Entries |
Document | Title | Date |
20080197735 | Rotor and stator fixture of electric motor - The present invention discloses a stator and rotor fixture of an electric motor, and the fixture includes a frame, a stator and a rotor, both contained in the frame. The center of the stator installs a sheathing portion, and the sheathing portion has an embedding groove extended inwardly from an internal lateral side of an opening disposed at a free end of the sheathing portion, and a bearing sheathed into the sheathing portion. The center of the rotor installs an axle, and the axle is sheathed into the bearing, and the rotor has a latch extended outward and corresponding to the embedding groove, such that the corresponding embedding groove and latch fix the stator and the rotor securely together, so as to facilitate installing and removing an electric motor. | 08-21-2008 |
20080203838 | Dynamic Bearing Device - A dynamic pressure generation portion is formed on the outer circumferential surface | 08-28-2008 |
20080203839 | BEARING UNIT AND MOTOR USING BEARING UNIT - A bearing unit includes a radial bearing; a thrust bearing; a path forming member; a housing; viscous fluid; and a communicating path. The communicating path has an axial path formed in the axis direction on a circumferential face of the radial bearing and a second end side path formed on the second end side face of the radial bearing. The second end side path is formed by a plurality of projections formed on one of the second end side face of the radial bearing and a face of the housing opposing to the second end side face of the radial bearing. The cross section of the second end side path has a cross sectional area greater than that of the cross section of the axial path. | 08-28-2008 |
20080203840 | Drive Unit with a Rotationally Fixed Bearing Element - The invention relates to a drive unit ( | 08-28-2008 |
20080211333 | Disk drive compatible new esters for FDB applications with optimized viscosity - An embodiment of the invention relates to a spindle motor of a magnetic recording storage device, the spindle motor comprising a fluid dynamic bearing comprising a lubricant comprising di-2-ethyl hexyl pimelate, di-2-ethyl hexyl suberate, or combinations thereof. | 09-04-2008 |
20080211334 | SPINDLE MOTOR - A spindle motor comprises a fixed shaft member, a sleeve, and an annular chucking portion. The fixed shaft member has an annular collar protruding outward from and substantially perpendicular to the outer peripheral surface of said fixed shaft member, and also has a thrust flange provided a specific distance away from said annular collar. The sleeve component is monolithic with a hub component The annular chucking portion is formed to include a surface along an axial direction outside said thrust flange in a diameter direction of said thrust flange. The annular chucking portion is disposed at a position in an axial direction that includes a vertical position of a surface to which said disk is attached. | 09-04-2008 |
20080218016 | Electronic motor apparatus capable of reducing friction - This invention discloses an electric motor apparatus including a frame, a stator and a rotor in the frame, an axle sleeve at the center of the stator and having an embedded groove extended inwardly and at a free end apart from the connecting position of the frame, a bearing sheathed into the axle sleeve, an axle at the center of the rotor and sheathed into the bearing, a latch at an internal side of the rotor and protruded outward for securing the stator and the rotor, and a ball embedded in the bearing and apart from the free end. By the embedded groove and latch, the stator and rotor are combined, and the axle is pressed against the ball. When the axle is rotated, the ball is driven to roll to reduce the friction, noises and wearing as well as enhancing the life expectancy and efficiency of the electric motor. | 09-11-2008 |
20080218017 | Enhanced thermal deformation resisting bearing of electric motor - This invention discloses an enhanced thermal deformation resisting bearing of an electric motor. The bearing includes a frame for containing a stator and a rotor. The stator has an axle sleeve sheathed with a bearing. The bearing has a hole groove for dividing the bearing into inner and outer layers. A connecting portion maintains an appropriate interval between the inner and outer layers. An embedded groove is extended inward and disposed at a free end of the axle sleeve. The rotor has an axle, and the periphery of the axle has a groove. The groove corresponds with the connecting portion of the bearing. The rotor has a protruding latch disposed proximate to the axle and embedded into the embedded groove. If the axle rotates in the bearing, the thinner inner layer will be expanded by high temperature, but the thicker connecting portion still maintains the bearing in its position. | 09-11-2008 |
20080218018 | COOLING FAN AND METHOD OF FABRICATION - A cooling fan includes a fan housing ( | 09-11-2008 |
20080218019 | FLUID DYNAMIC PRESSURE BEARING AND SPINDLE MOTOR - A fluid dynamic bearing includes a shaft, a stationary portion supporting the shaft in a rotatable manner, a lubricating oil arranged in a radial gap defined between an outer circumferential surface of the shaft and a surface of the stationary portion, opposing each other. The fluid dynamic bearing includes a first seal portion arranged radially outside of the radial gap, and a second seal portion arranged at an axially upper end of the radial gap. The axial length of the first seal portion is greater than that of the second seal portion. | 09-11-2008 |
20080218020 | Shaft assembly - A shaft assembly includes a rotatable shaft, an upper supporting frame having a bearing cavity, a lower supporting frame coupling with the upper supporting frame, a bearing assembly, and a shaft guider. The bearing assembly includes a first bearing rotor disposed in the bearing cavity to coaxially engage with the rotatable shaft and a second bearing rotor coaxially engaging with the rotatable shaft, wherein a circumferential size of the bearing cavity is larger than an outer diameter of the bearing module. The shaft guider is coupled between the first and second bearing rotors to retain a position of the bearing assembly with respect to the rotatable shaft, wherein the shaft guider has an outer diameter smaller than the circumferential size of the bearing cavity and an inner diameter smaller than an outer diameter of each of the first and second bearing rotors. | 09-11-2008 |
20080224554 | BEARING ASSEMBLY AND MOTOR USING THE BEARING ASSEMBLY - In a bearing assembly, a shaft is inserted into a sleeve, and a lower end of the shaft is attracted to a magnet chip which is held by an auxiliary yoke. A retaining member and an auxiliary washer are sandwiched between a lower end surface of the sleeve and a contact portion of the auxiliary yoke so as to retain the shaft in the sleeve. The auxiliary washer has an inner diameter larger than that of the retaining member and a maximum diameter of the lower end of the shaft. | 09-18-2008 |
20080238228 | MAGNETIC SHAFT OF A COOLING FAN - The present invention provides an improved structure of the magnetic shaft of a cooling fan. A magnetic attraction component is comprised of a magnetic ring, a magnetic inductive bottom board, and a magnetic inductive ring. The magnetic field generated by the magnetic ring is guided from the upper and lower side by the magnetic inductive ring and the magnetic inductive bottom board respectively, so that the range of magnetic field scattered by the magnetic ring is effectively and reliably guided and suppressed. The range of the magnetic field is reduced to the smallest possible, and interference with other components is minimized within the cooling fan, working stability and quality of the cooling fan being enhanced. | 10-02-2008 |
20080238229 | MOTOR - A motor may include a rotor provided with a rotor shaft, a cylindrical bearing made of resin material and provided with a bearing part for rotatably supporting a shaft end of the rotor shaft, and a bearing holder provided with a through-hole into which the cylindrical bearing is inserted. The cylindrical bearing is slidably held in the through-hole and at least one of a first end face where the bearing part is formed and a second end face which is an opposite end face to the first end face is formed with a ring-shaped groove. Therefore, a wall thickness of resin for forming the bearing can be made thinner and thus shrinkage of the side wall part of the bearing which faces an inner peripheral face of the through-hole of the bearing holder is reduced. | 10-02-2008 |
20080265702 | Permanent magnetic brushless motor with length adjustable air gap based on load - A permanent magnetic brushless motor with a length adjustable air gap comprises: a body; a stator secured to one end of the body; a spindle pivotally installed to the body; a part of the spindle protruding from the body; a rotor being axially movable with respect to the spindle by using a sliding unit; the rotor being pivoted in the body and an air gap being formed between the rotor and the stator; a length of the air gap being adjustable; at least one connecting unit two ends of which are connected to the rotor and the spindle; the orientation of the connecting unit being changeable with the rotation angle between the rotor and the spindle; and an elastic unit capable of pushing the rotor to move away from the stator so that the connecting unit moves to a straight state. In the motor, the adjustment of the air gap is automatically performed during the operation of the motor without needing any manual action. | 10-30-2008 |
20080265703 | PRODUCTION METHOD OF FLUID DYNAMIC-PRESSURE BEARING AND SPINDLE MOTOR FURNISHED WITH THE FLUID DYNAMIC-PRESSURE BEARING - A gas is fed, so as to cause a gas flow to occur from a lower opening of a bearing hole of a sleeve | 10-30-2008 |
20080284266 | ELECTRIC MOTOR - An electric motor has a wound rotor having a shaft, a rotor core, a commutator and windings wound about the rotor core and connected to the commutator. It has a stator confronting the rotor; brush gear connecting the commutator to motor terminals; first and second bearings for rotatably supporting the rotor, and an oil stopper fitted to the shaft between the commutator and the first bearing for preventing oil migrating along the shaft from the first bearing reaching the commutator. The oil stopper is of high temperature material, preferably a metal such as brass, aluminum and steel. | 11-20-2008 |
20080303366 | Electric fan and casing thereof - The present invention discloses an electric fan and a casing thereof, wherein the casing wall can be arbitrarily detached to from an air flow inlet. The four corner elements of the casing define an assembly space where the electric fan is accommodated. First fixing members and second fixing members matching each other are respectively formed in the corner elements and the casing walls; the first and second fixing members can thus be assembled together or separated apart. Thereby, an electric fan casing having detachable casing walls is thus achieved. | 12-11-2008 |
20080309183 | Dynamic Bearing Device - Disclosed is a dynamic bearing device which allows production of a smaller housing at low cost and which suppresses ion elution from the resin portion to thereby maintain cleanliness in the dynamic bearing device and exert a desired bearing performance. A dynamic bearing device | 12-18-2008 |
20090009016 | Spindle Motor - A spindle motor is provided. The spindle motor comprises a base, a bearing housing, a bearing, a rotatable rotating shaft, a stator, and a rotor. The base comprises a coupling area protruding therefrom. The bearing housing is fixed to the coupling area. The bearing is disposed within the bearing housing. The rotatable rotating shaft has one side and the other side. The one side is fixed to the bearing, and the other side is exposed toward an outside of the bearing housing. The stator is disposed around the bearing housing. The rotor is fixed to the rotating shaft to rotate by interaction with the stator. | 01-08-2009 |
20090015085 | Vibration damping for a rotating shaft - The invention provides damping techniques for a rotating shaft. The rotating shaft is supported by rotary bearings. The damping techniques control vibration of the rotating shaft by creating a fluid film in a support element of the rotating shaft. For example, the fluid film may be created between a housing and the rotary bearings. The fluid may be supplied by a pump, and the supply amount of fluid to create the fluid film is relative to the rotational velocity of the shaft. Vibration can be prevented for every operational rotational velocity of the rotating shaft. In some embodiments, the rotating shaft may be powered by or part of an electric motor for a vehicle. | 01-15-2009 |
20090033164 | WEAR REDUCTION IN FDB BY ENHANCING LUBRICANTS WITH NANOPARTICLES - An embodiment of the invention relates to a spindle motor of a magnetic recording storage device, the spindle motor comprising a fluid dynamic bearing comprising a lubricant comprising at least one of an organic and inorganic nanomaterial. | 02-05-2009 |
20090039722 | ESP Motor Design - A submersible pump motor having an electroless nickel-boron coating applied to the sleeve and/or bearing. | 02-12-2009 |
20090066178 | ELECTRIC MOTOR APPARATUS CAPABLE OF REDUCING FRICTION - This invention discloses an electric motor apparatus including a frame, a stator and a rotor in the frame, an axle sleeve at the center of the stator and having an embedded groove extended inwardly and at a free end apart from the connecting position of the frame, a bearing sheathed into the axle sleeve, an axle at the center of the rotor and sheathed into the bearing, a latch at an internal side of the rotor and protruded outward for securing the stator and the rotor, and a ball embedded in the bearing and apart from the free end. By the embedded groove and latch, the stator and rotor are combined, and the axle is pressed against the ball. When the axle is rotated, the ball is driven to roll to reduce the friction, noises and wearing as well as enhancing the life expectancy and efficiency of the electric motor. | 03-12-2009 |
20090072642 | SPINDLE MOTOR AND DISK DRIVE DEVICE USING THE SAME - A spindle motor and a disk drive device are provided that has a high operation efficiency of the motor, that does not leak oil, and that has an improved stability by decreasing a runout component in the direction of the rotation axis. The spindle motor includes rotor hub ( | 03-19-2009 |
20090072643 | BEARING UNIT, MOTOR USING THE BEARING UNIT, AND ELECTRONIC EQUIPMENT USING THE MOTOR - Disclosed herein is a bearing unit including a shaft; a radial bearing for supporting the outer circumferential surface of the shaft; a housing for accommodating the radial bearing, the housing having an open end from which the shaft is inserted and a closed end opposite to the open end in the axial direction of the shaft; a lubricating oil filled in the housing to reduce rotational friction of the shaft; a holding member provided at the open end of the housing for holding the lubricating oil; and a sealing member for closing the open end of the housing to prevent the leakage of the lubricating oil; wherein the sealing member having a side wall portion interposed between the holding member and the shaft and opposed to the outer circumferential surface of the shaft. | 03-19-2009 |
20090079283 | Fluid dynamic bearing motor with a lubricated contact surface - A fluid dynamic bearing motor is provided having relatively rotatable facing surfaces that are reliably lubricated. A radial gap is defined between the relatively rotatable facing surfaces, wherein a first axial end of a fluid dynamic bearing has a larger radial gap as compared to a central region of the fluid dynamic bearing. In an aspect, a fluid recirculation passageway is established between the first axial end and the central region of the fluid dynamic bearing. In an aspect, a fluid reservoir is formed axially above the first axial end of the fluid dynamic bearing. Robustness of the FDB motor is increased, and sensitivity to external loads or mechanical shock events is reduced. Dry surface-to-surface contact of bearing surfaces and reduced performance or failure of the motor or disc drive components is averted. The use of diamond-like coating on relatively rotatable fluid bearing surfaces may also be reduced or eliminated. | 03-26-2009 |
20090091203 | RETAINER BEARING FOR AN ELECTRIC MACHINE, AND ELECTRIC MACHINE COMPRISING AT LEAST ONE SUCH RETAINER BEARING - Disclosed is a retainer bearing ( | 04-09-2009 |
20090102300 | Spindle motor for a hard disk drive - The invention relates to a spindle motor for a hard disk drive comprising a baseplate ( | 04-23-2009 |
20090102301 | ELECTRIC MOTOR - An electric motor has a wound rotor having a shaft, a rotor core, a commutator and windings wound about the rotor core and connected to the commutator. The motor has a stator confronting the rotor; brush gear electrically connecting the commutator to motor terminals; first and second bearings for rotatably supporting the rotor, and an oil collector fitted to the shaft between the commutator and the first bearing for preventing oil migrating along the shaft from the first bearing reaching the commutator. The oil collector is of high temperature material, preferably a metal such as brass, aluminum and steel. The oil collector returns the collected oil to the first bearing. | 04-23-2009 |
20090108691 | HYDRODYNAMIC BEARING DEVICE, MOTOR AND INFORMATION RECORDING AND REPRODUCING APPARATUS IN WHICH SAME IS USED, AND METHOD FOR MANUFACTURING SHAFT USED IN HYDRODYNAMIC BEARING DEVICE - A hydrodynamic bearing device is provided for a spindle motor used in a hard disk drive or the like with a good state of fastening and good fastening strength between a shaft and a fixed member. The hydrodynamic bearing device includes a shaft that has a cylindrical main shaft portion and a fixing portion provided at one end of the main shaft portion, a sleeve that has a bearing hole in which the main shaft portion is inserted in a rotatable state, and a fixed member that is fixed to the fixing portion of the shaft. A nitride layer is formed on the main shaft portion, and a nitride layer non-forming film is formed on the fixing portion. | 04-30-2009 |
20090115275 | SPINDLE MOTOR, INFORMATION RECORDING AND REPRODUCING APPARATUS THAT MAKES USE OF SAME, AND METHOD FOR MANUFACTURING SPINDLE MOTOR - A spindle motor, comprising a base having a cylindrical drawn portion formed by plastic working, a sleeve that is inserted in the drawn portion, a shaft that is inserted in a state of being rotatable relative to the sleeve, and a lubricant that fills the gap between the sleeve and the shaft, in which the sleeve is affixed with an adhesive agent to the drawn portion inner periphery, wherein there are adhesive reservoirs around the inner periphery of the drawn portion. These adhesive reservoirs are formed during a series of plastic working steps in which the cylindrical drawn portion is formed. | 05-07-2009 |
20090115276 | Outer rotor motor - An outer rotor motor has a bearing housing with reduced machining and material costs, can be assembled with high accuracy, and has favorable durability. A bearing is attached to an inner circumferential surface of a housing main body that has been formed in a cylindrical shape by plastic deformation caused by press molding a metal matrix. At least one protruding surface is formed by plastic deformation so as to protrude further outward than the housing main body, and the stator core is attached to the outer circumference-side of the at least one protruding surface. | 05-07-2009 |
20090115277 | MOTOR MOUNTED WITH IMPROVED DYNAMIC PRESSURE FLUID BEARING MECHANISM - A motor is composed of a rotor and a stator. The rotor includes a shaft, a hub having a cylindrical wall and a thrust ring. The stator includes a motor base, an inner seal and a sleeve having a flange section. The rotor is supported in a thrust direction by a first thrust dynamic pressure fluid bearing constituted by a top surface of the thrust ring, a surface of the flange section with having a first gap between them, and lubrication fluid filled in the first gap and a second thrust dynamic pressure fluid bearing constituted by a bottom surface of the thrust ring, an end surface of the inner seal with having a second gap between them, and the lubrication fluid filled in the second gap, and supported in a radial direction by a radial dynamic pressure fluid bearing constituted by an inner circumferential surface of the sleeve, an outer circumferential surface of the shaft with having a third gap between them, and the lubrication fluid filled in the third gap. The motor is further composed of a taper seal section constituted by an inner circumferential surface of the cylindrical wall and an outer circumferential surface of the inner seal, a main lubrication route linking the taper seal section, the second gap, the first gap and the third gap, and a bypass route linking the third gap and an intermediate point between the second and first gaps, wherein both routes are filled with the lubrication fluid. | 05-07-2009 |
20090121570 | MOTOR FOR AN ELECTRIC POWER STEERING APPARATUS - A motor for an electric power steering apparatus can ensure an appropriate preload to an outer race of a rolling element bearing by adjusting the thickness of a spacer without replacement of a wave washer for a change in an axial dimension between a bottom surface of a bearing box and the bearing. The motor includes a rotor, a casing that receives the rotor and has the bearing box in which the bearing rotatably supporting a shaft of the rotor is received, an annular wave washer that is arranged between the bottom surface of the bearing box and the bearing, and applies a preload to the outer race of the bearing, and an annular spacer that is arranged between the bottom surface of the bearing box and the bearing so as to be in abutment with the wave washer for adjusting the preload applied to the outer race. | 05-14-2009 |
20090127954 | MOTOR-TYPE POWER DEVICE - Due to a centrifugal force in a vehicle width direction due to turning of an automobile, oil in an electric motor housing chamber housing an electric motor and oil in a transmission housing chamber housing a reduction gear and a differential gear flows to-and-fro via oil communication passages that penetrate a partitioning wall. An opening on the transmission housing chamber side of the oil communication passages is spaced from the partitioning wall. Hence, when oil moves from the transmission housing chamber side to the electric motor housing chamber side, it is possible to prevent the oil quantity on the electric motor housing chamber side from increasing excessively and suppress an increase in resistance to oil stirring by a rotor of the electric motor while retaining a constant oil amount on the transmission housing chamber side to ensure lubricating performance for the reduction gear and the differential gear. | 05-21-2009 |
20090127955 | MOTOR - A motor may include a rotor provided with a rotation shaft, a stator, a frame fixed to the stator and provided with a bearing part that rotatably supports an output side of the rotation shaft, and an urging member mounted on the bearing part for urging the rotation shaft. The bearing part may include a bearing, formed with a protruded part protruded from a flat plate part of the frame. The urging member may include a bottom face part provided with a spring part for urging the rotation shaft, a pair of side plate parts bent from side edge parts of the bottom face part, and a pair of hook parts bent on inner sides from the pair of the side plate parts to be engaged with the protruded part. The urging member is mounted on the bearing part such that the hook parts are engaged with the protruded part. | 05-21-2009 |
20090140587 | Spindle motor having a fluid dynamic bearing system and a stationary shaft - The invention relates to a spindle motor having a fluid dynamic bearing system comprising axial and radial bearings that contains a rotor component ( | 06-04-2009 |
20090140588 | Spindle motor having a fluid dynamic bearing system and a stationary shaft - The invention relates to a spindle motor having a fluid dynamic bearing system that contains a rotor component taking the form of an integrated hub/bearing bush arrangement which encloses a straight, stationary shaft, which in turn is connected at both its ends to axially aligned bearing components, formed in such a way that they seal the fluid dynamic bearing system formed between the shaft and the rotor component and open at both ends. The open ends of the bearing gap are sealed by capillary seals or pumping seals or a combination of capillary and pumping seal. | 06-04-2009 |
20090152966 | BEARING SEALS - Bearing arrangement ( | 06-18-2009 |
20090152967 | Brushless motor and manufacturing method thereof - A second ball bearing is installed from a first axial side toward a second axial side into an interior of a bearing holder of a rotor through an opening of the bearing holder, so that an outer race of the second ball bearing is press fitted to an inner peripheral portion of the interior of the bearing holder. A first ball bearing is inserted from the first axial side toward the second axial side into the interior of the bearing holder of the rotor through the opening of the bearing holder after the installing of the second ball bearing, so that an outer race of the first ball bearing is press fitted to the inner peripheral portion of the interior of the bearing holder and is axially spaced from the outer race of the second ball bearing. | 06-18-2009 |
20090152968 | Spindle motor - A spindle motor including a rotor hub which is rotationally driven by a magnetic action of a rotational magnetic field generated when a current is applied to a wire wound around teeth of a stator core and a magnetic field of a magnet provided on a rotor. Herein, the stator core formed by laminating magnetic steel plates is mounted to an outer periphery of a supporting part of a rotation support shaft of the rotor hub, and the supporting part is made of sintered metal containing a ferromagnetic material. This spindle motor can suppress generation of vibration and noise even when it is reduced in size. | 06-18-2009 |
20090152969 | OIL-REPELLENT FILM FORMING METHOD, MOTOR MANUFACTURING METHOD AND MOTOR - A method is for forming an oil-repellent film on a metallic part in a dynamic fluid pressure bearing mechanism used for a motor. The method includes applying a flowable oil-repellent agent on an application region of the metallic part; arranging an induction coil in the vicinity of the metallic part; and affixing the oil-repellent agent onto the metallic part by applying an induction heating to the metallic part by supplying an AC current with a frequency of about 5 to 100 kHz to the induction coil. Further, a motor includes a dynamic fluid pressure bearing mechanism including a metallic part on which an oil-repellent film is formed by the above method; a stator unit; and a rotor unit supported by the dynamic fluid pressure bearing mechanism in a manner rotatable with respect to the stator unit. | 06-18-2009 |
20090160277 | Fluid Dynamic Pressure Bearing - A fluid dynamic bearing ( | 06-25-2009 |
20090160278 | MOTOR ASSEMBLY - Provided is a motor assembly including a supporting body; a bearing member including an inner race and an outer race; and a supporting unit for supporting the bearing member onto the supporting body, wherein the supporting body comprises: a receiving portion with an opening on a portion in the diameter direction of the output shaft for receiving the bearing member having a first supporting surface disposed perpendicularly to the output shaft of the motor and a second supporting surface separated from the first supporting surface in parallel to the first supporting surface; a side surface of the outer race of the bearing member contacts the first supporting surface, the supporting unit includes a bearing sheet that is forcedly inserted between the other side surface of the outer race in the bearing member that is received in the receiving portion and the second supporting surface, wherein the bearing sheet includes a radial supporting portion contacting an outer circumferential surface of the bearing member received in the receiving portion so as to prevent the bearing member from escaping from the receiving portion. | 06-25-2009 |
20090174269 | BEARING DEVICE FOR MAIN ELECTRIC MOTOR FOR VEHICLE - Oil is supplied to bearing | 07-09-2009 |
20090200882 | ORBITAL HYBRID MAGNETIC ELECTRONIC ENGINE AND GENERATOR - A motor configuration between the rotor and the commutation system, comprising rotor coils energized by mechanical or electrical ways wherein a positive charge, negative charge and a no-charge section is applied in order to reduce the heat and energy consumption and therefore increasing the motor life. | 08-13-2009 |
20090212648 | SPINDLE MOTOR AND STORAGE DISK DRIVE APPARATUS - A spindle motor includes a rotor unit and a stator unit arranged to rotatably support the rotor unit about a central axis through a fluid dynamic pressure generated in a lubricant held within a bearing gap between the rotor unit and the stator unit. The bearing gap has an annular opening coaxial or substantially coaxial with the central axis, the lubricant defining a capillary seal near the opening within the bearing gap. An oil buffer continuously expanding outwards from the opening of the bearing gap is provided between the rotor unit and the stator unit, the oil buffer being used in temporarily storing the lubricant when the lubricant is filled into the bearing gap, and an oleophobic treatment is performed on a surface of the rotor unit and a surface of the stator unit outside the oil buffer. | 08-27-2009 |
20090230799 | Fixing strcture of motor spindle - The present invention relates to a fixing structure of motor spindle, which includes a spindle and a snap ring. One end of the spindle has a snap slot with a reduced diameter, and the inner hole of the snap ring shall be slightly greater than the maximum outer diameter of the snap slot, thereby maintaining a gap with a radius difference between the inner hole of the snap ring and the snap slot of the spindle in size of less than or equivalent to 0.37 mm. Meanwhile, by means of the holding effect of a bearing and a bottom cap, the snap ring of the present invention won't rotate with the spindle and won't generate noise due to abrasion with the spindle. Not only can the snap ring stably hold and fix the spindle to prevent the spindle from disengaging, but also it is free of the noise issue out of abrasion. | 09-17-2009 |
20090243411 | Transmission Systems of Continuously Variable Transmission Ratio - A transmission system with continuously variable transmission ratio includes an input shaft ( | 10-01-2009 |
20090243412 | MOTOR - A motor may include a bearing for supporting a rotation shaft, a bearing holder which is formed with a bearing holding hole on which the bearing is mounted, and a spring member which is mounted on an outer end face of the bearing holder for urging the bearing toward the rotation shaft. The spring member includes a plurality of hook parts which engages with an inner end face of the bearing holder through an outer peripheral side of the bearing holder, and a portion of the inner end face of the bearing holder is formed with a recessed engaging part with which the plurality of the hook parts is engaged. The recessed engaging part includes a cut-out part which reaches to an aperture edge of the bearing holding hole. | 10-01-2009 |
20090256441 | Motor structure - The present invention relates to a motor structure, which includes a base having a shaft tube centrally, in which a bottom portion of the shaft tube is sealed for placing a bearing therein, and at least a reference plane is provided on the outer periphery of the shaft tube; a rotor having a spindle disposed centrally therein for passing through the bearing and rotating therein; a stator module disposed on the outer periphery and positioned on the reference plane. Besides, an urging part is disposed on an inner periphery of the top insulation sleeve of the stator module to urge against the bearing so that the precise assembling position of the stator module can be definitely defined to prevent the bearing from getting loose due to high assembling position and to prevent the fracture of the urging part due to low assembling position. | 10-15-2009 |
20090256442 | Generator and wind turbine - A generator for a wind turbine including a rotor arrangement and a stator arrangement is provided. The rotor arrangement includes a cylinder barrel or a sleeve enclosing a rotor element provided for the production of energy and having an outer cylinder barrel shaped surface in relation to a centre axis of the generator acting as a bearing surface of the rotor arrangement. The stator arrangement includes a cylinder barrel or a sleeve covering a stator element provided for the production of energy and having an inner cylinder barrel shaped surface in relation to the centre axis of the generator acting as a bearing surface of the stator arrangement. The bearing surfaces of the rotor arrangement and the stator arrangement are arranged oppositely to each other with a substantially cylinder barrel shaped air gap in-between, wherein the air gap comprises a lubricant. Also, a wind turbine including a generator is provided. | 10-15-2009 |
20090261672 | BEARING POSITIONING STRUCTURE FOR MOTOR - A bearing positioning structure for a motor includes an axial tube and a positioning member. The positioning member includes a pressing portion and a coupling portion. The coupling portion of the positioning member is engaged with a coupling section of the axial tube for securely mounting the positioning member to the axial tube, with the pressing portion of the positioning member pressing against a bearing to position the bearing in the axial tube. In another example, the coupling portion of the positioning member engages with a coupling section on a stator. | 10-22-2009 |
20090267435 | Submersible Motor - A submersible motor is provided for the drive of a submersible pump, with a rotor ( | 10-29-2009 |
20090273250 | ELECTRIC MOTOR, IN PARTICULAR FOR MOTOR VEHICLE WINDSHIELD WIPER DRIVE WITH IMPROVED SEATING FOR THE ARMATURE SHAFT BEARING - The invention relates to an electric motor ( | 11-05-2009 |
20090302697 | HOUSING FOR FLUID DYNAMIC BEARING DEVICE - Provided is a housing for a resin fluid dynamic bearing device in which deterioration with time of a fixing force for another member is mitigated and which can maintain a high bearing performance for a long period of time. The housing formed of a resin composition exhibiting a compression creep amount of 8% or less when a compressive pressure of 80 MPa is applied for 168 hours at an atmosphere temperature of 80° C., provides a sufficient fixing force for the another member fixed with a press-fitting force, for example, a bearing sleeve press-fitted into an inner periphery of the housing even after a long term use. Thus, there is no fear of fixing positions of the another member with respect to the housing being deviated and a high bearing performance is maintained for a long period of time. | 12-10-2009 |
20090309437 | Motor - A motor includes a housing, a rotor and a stator. The housing includes a shaft tube receiving a bearing. The rotor includes a shaft rotatably extending through the bearing and having an annular groove in a neck shape formed on an outer periphery thereof. The stator includes an assembling hole receiving the outer periphery of the shaft tube, with the stator including an upper bobbin, a lower bobbin, a plurality of silicon steel plates sandwiched between the upper and lower bobbins, and a winding wound around the plurality of silicon steel plates. The upper bobbin includes an abutting member formed on an inner periphery thereof. The abutting member abuts against the bearing and extends into the annular groove of the shaft to avoid the bearing and the rotor disengaging from the shaft tube. Consequently, assembling convenience and rotating stability of the motor are enhanced. | 12-17-2009 |
20090309438 | Motor Structure - A motor structure includes a housing having a shaft tube receiving a bearing. The shaft tube includes a positioning section on an outer periphery thereof. A rotor includes a shaft rotatably extending through the bearing. A stator is mounted around the shaft tube and includes an upper bobbin having an abutting portion and a lower bobbin having an engaging portion. The positioning section of the shaft tube provides the engaging portion of the lower bobbin with an axial supporting force along a longitudinal axis of the shaft tube to position the stator in a fixed axial position relative to the bearing along a longitudinal axis of the shaft tube. Also, the abutting portion of the upper bobbin abuts the bearing to prevent the bearing from disengaging from the shaft tube. | 12-17-2009 |
20090309439 | HYDRODYNAMIC BEARING DEVICE - A hydrodynamic bearing device includes a rotary part including a shaft and a rotor hub; a stationary part including a bearing member, which has an inner peripheral surface radially confronting with an outer peripheral surface of the shaft, a bearing bore, and an upper surface axially confronting with a bottom surface of the rotor hub; a radial bearing portion formed between the outer peripheral surface of the shaft and the inner peripheral surface of the bearing member; a thrust bearing portion formed between the bottom surface of the rotor hub and the upper surface of the bearing member; and a communication hole having a first end opened radially outwardly at the thrust bearing portion and a second end opened toward a closed side of the first gap, the communication hole being formed at the bearing member. | 12-17-2009 |
20090322170 | Rolling Bearing, Spindle Support Structure of Main Motor for Railway Vehicle, and Bearing Structure - A cylindrical roller bearing | 12-31-2009 |
20090322171 | Motor bearing preload mechanism - A motor bearing preload mechanism is a modulized object composed of a screw, a resilient pad and a connecting pad to be fixed in a motor housing of a motor so as to apply a pre-pressure to a motor shaft of the motor. | 12-31-2009 |
20100001603 | POLYGON MIRROR SCANNER MOTOR AND METHOD OF MANUFACTURING THE SAME - The rotor of this polygon mirror scanner motor is composed of a rotor magnet provided in the inner wall of a rotor frame, a rotor boss having a circular tube part and provided in the rotor frame, and a polygon mirror mounted on the rotor boss. The stator is composed of a stator core formed by laminating magnetic members and disposed oppositely to the rotor magnet, a stator coil wound in the stator core, and an iron plate circuit board having a through-hole. A dynamic pressure bearing is composed by forming a dynamic pressure groove in either one of the shaft fixed in the through-hole by laser welding, and the circular tube part of the rotor boss, and the circular tube part of the rotor boss is supported by the shaft. | 01-07-2010 |
20100007230 | Motor with sheet-like coil - A spindle motor includes: a stator yoke having a circular cylinder shape; a rotor magnet disposed opposite to the stator yoke with an air gap therebetween; a sheet-like coil disposed at a surface of the stator yoke opposing the rotor magnet; and a bearing structure, wherein the sheet-like coil includes a plurality of individual coils having a spiral-shape and arrayed in a circumferential direction, and a pattern made of a same material as the individual coils and disposed between two adjacent individual coils. | 01-14-2010 |
20100026118 | DIRECT CURRENT MOTOR - A direct current motor includes: a stator ( | 02-04-2010 |
20100026119 | MOTOR MOUNTED WITH STOPPER FITTING FOR FIXING BALL BEARING - A motor, in which a creep phenomenon can be prevented and a ball bearing can readily be mounted, is provided. A pair of end brackets each have a bearing hole in which a ball bearing is fitted. A pair of ball bearings are fitted into the bearing holes of the end brackets such that an outer race portion of each ball bearing may abut on a first wall surface and a second wall surface of the end bracket. A stopper fitting is pushed into a recessed portion of the end bracket until a ring portion of the stopper fitting abuts on the outer race portion of the ball bearing. Six engaging pieces of the stopper fitting are engaged in a fourth wall surface defining the recessed portion due to a restoring force of the engaging pieces, which have been resiliently bent or warped, to restore from the bent or warped state. Thus, each ball bearing is tightly fixed in the bearing hole by means of the stopper fitting. | 02-04-2010 |
20100045129 | SPINDLE MOTOR - A spindle motor is disclosed, wherein the spindle motor is integrally formed by a one side-exposed cylindrical bearing housing by pressing a metal sheet plate to save material costs and to simplify an assembly process of constituent elements, whereby the manufacturing cost can be reduced, and a bearing housing is press-fitted or bonded to a base without caulking process to make a perpendicularity of the bearing housing against the base accurate, whereby a perpendicularity of a rotation shaft against the base is also accurate, and whereby noise and vibration are reduced, and the integral formation of the bearing housing inhibits oil discharged from the bearing from leaking toward a lower surface of the beating housing, thereby prolonging the life of the product. | 02-25-2010 |
20100052446 | Fluid dynamic bearing system - The invention relates to a fluid dynamic bearing system that comprises a first conical bearing and a second conical bearing working in opposition to the first conical bearing, the conical bearings being disposed along a stationary shaft. The first conical bearing has a first bearing cone disposed on the shaft having bearing surfaces extending at an angle α to the rotational axis, and a first bearing bush having a tapered bearing bore and bearing surfaces that are separated by a first bearing gap filled with bearing fluid from the bearing surfaces of the first bearing cone. The second conical bearing has a second bearing cone disposed on the shaft having bearing surfaces extending at an angle β to the rotational axis, and a second bearing bush having a tapered bearing bore and bearing surfaces that are separated by a second bearing gap filled with bearing fluid from the bearing surfaces of the second bearing cone. According to the invention, the bearing surfaces of the first conical bearing are smaller in surface area than the bearing surfaces of the second conical bearing and the angle α is greater than the angle β. | 03-04-2010 |
20100052447 | HYDRODYNAMIC BEARING DEVICE, SPINDLE MOTOR, AND INFORMATION DEVICE - The hydrodynamic bearing device has a sleeve composed of a sintered material and having a compression-absorbing space inside the sleeve, the sleeve having a bearing hole in the center thereof; a shaft rotatably inserted into the bearing hole; a bearing portion formed between the bearing hole and the shaft; a hydrodynamic groove formed on at least one of the internal peripheral surface of the bearing hole and the external peripheral surface of the shaft; a concavity having one or more steps and formed to one end of the sleeve in the axial direction; a convexity formed to the other end of the sleeve in the axial direction, the convexity having a shape similar to the concavity; and a lubricating fluid filled in the gap of the bearing portion. The hydrodynamic bearing device has a readily obtainable predetermined shape precision, the internal density of the sintered material is made uniform, and lubricating fluid therein does not leak from the surface. | 03-04-2010 |
20100060094 | DIRECT-CURRENT MOTOR - [PROBLEMS] To provide a DC motor in which the rattling and the axial deviation of a rotor are restrained without increasing the axial dimension of the motor. | 03-11-2010 |
20100060095 | SPINDLE MOTOR AND APPARATUS FOR INHIBITING OIL LEAKAGE IN SPINDLE MOTOR - An apparatus for inhibiting oil leakage is disclosed by which the oil leakage can be effectively inhibited with a simple structure, where the apparatus is extensively formed along an outer periphery of a rotation shaft at a position higher than at least an upper end of a bearing and is formed with an oil barrier that restrains oil rise. | 03-11-2010 |
20100072843 | Motor - A motor includes a bearing having first and second end faces spaced along a longitudinal axis thereof. A longitudinal hole extends from the first end face through the second end face and includes a recessed portion having first and second peripheral edges respectively contiguous to the first end face and an inner periphery of the longitudinal hole. A retaining member is mounted to the first end face. A radial spacing between an inner periphery of a through-hole of the retaining member and the inner periphery of the longitudinal hole of the bearing in a radial direction is not greater than an axial spacing from the first end face to the second peripheral edge. The retaining member further includes a plurality retaining plates. The recessed portion provides a space sufficient to allow deformation of the retaining plates when inserting a shaft through the through-hole into the longitudinal hole of the bearing. | 03-25-2010 |
20100072844 | MOTOR - A motor is disclosed. The motor in accordance with an embodiment of the present invention can include: a shaft; a bearing supporting the shaft to rotate; a thrust plate supporting a lower end of the shaft a boss joined to the shaft and having a ring-shaped groove on a side facing the bearing; and a rotor joined to the boss. | 03-25-2010 |
20100079022 | HYDRODYNAMIC BEARING DEVICE, AND SPINDLE MOTOR AND INFORMATION APPARATUS EQUIPPED WITH SAME - With a hydrodynamic bearing device | 04-01-2010 |
20100102661 | Rotating shaft for ultra slim spindle motor - Disclosed herein is a rotating shaft for an ultra slim spindle motor which reduces a frictional area between the rotating shaft and a bearing, thus being capable of reducing consumption current consumed during the rotation of the rotating shaft. The ultra slim spindle motor includes a rotating shaft for axially supporting a rotor casing and a bearing for rotatably supporting the rotating shaft. The rotating shaft includes a coupling part which is press-fitted into the rotor casing, upper and lower contact parts which are supported, respectively, by an upper portion and a lower portion of the bearing, and a non-contact part which is provided between the upper and lower contact parts in such a way that the non-contact part is not in contact with the bearing. | 04-29-2010 |
20100109460 | Motor - A motor includes a base, a stator, a retaining seat, a bearing, a retaining ring and a rotor. The base has a shaft tube with an assembling hole. The stator is mounted around the shaft tube. The retaining seat, bearing and retaining ring are received in the assembling hole. Outer diameters of the retaining seat and the retaining ring are equal to a diameter of the assembling hole. The bearing is sandwiched and positioned between the retaining ring and the retaining seat. Radial and axial movement of the retaining seat, the bearing and the retaining ring is avoided effectively after being mounted into the shaft tube, so that the rotor is smoothly coupled to the retaining ring, the nearing and the retaining seat. Consequently, convenience of assembling and a simplified structure are provided. | 05-06-2010 |
20100109461 | Vehicle drive device - A vehicle drive device includes a partition wall defining at least a part of a space where the rotating electrical machine is accommodated; a rotor support member that rotates about the rotation shaft center and supports the rotor; a bearing disposed between the rotor support member and the partition wall; a first seal member that forms a first oil chamber that is in contact with one side end of the bearing; a second seal member that forms a second oil chamber that is in contact with the other side end of the bearing; a supply oil passage that supplies oil to the first oil chamber; and a discharge oil passage that discharges oil from the second oil chamber. | 05-06-2010 |
20100109462 | TRANSVERSE AND/OR COMMUTATED FLUX SYSTEM STATOR CONCEPTS - Disclosed are transverse and/or commutated flux machines and components thereof, and methods of making and using the same. Certain exemplary stators for use in transverse and commutated flux machines may be configured with gaps therebetween, for example in order to counteract tolerance stackup. Other exemplary stators may be configured as partial stators having a limited number of magnets and/or flux concentrators thereon. Partial stators may facilitate ease of assembly and/or use with various rotors. Additionally, exemplary floating stators can allow a transverse and/or commutated flux machine to utilize an air gap independent of the diameter of a rotor. Via use of such exemplary stators, transverse and/or commutated flux machines can achieve improved performance, efficiency, and/or be sized or otherwise configured for various applications. | 05-06-2010 |
20100123361 | MOTOR - A motor is disclosed. The motor in accordance with an embodiment of the present invention includes: a rotor, a shaft, which is coupled to the rotor; a plate, which is coupled to an outer circumference of the shaft; a bearing, which supports the shaft such that the shaft can rotate; a cap, which is coupled to the bearing such that an edge of the plate is covered; a lubricant, which is filled between the shaft and the bearing; and a sealing part, which is coupled to an inner side of the cap and in which the sealing part is made of a transparent material such that an amount of the lubricant filled can be checked. Therefore, the amount of the lubricant filled between the shaft and the bearing can be directly checked. | 05-20-2010 |
20100123362 | HYDROSTATIC BEARING PAD TYPE ROTATING DEVICE - A hydrostatic bearing pad type rotating device includes: a stationary body; an axial pad and a radial pad each attached to the stationary body; a rotating body supported by the axial pad and the radial pad at least in the radial direction toward an axis thereof so as to be rotatable about the axis; and a motor for providing a driving force to rotate the rotating body. The motor includes a stator attached to the stationary body, and a rotor attached to the rotating body to be opposite to the stator with a gap interposed therebetween. At least one of the stator and the rotor is attached such that its location is adjustable in the radial direction toward the axis and the axial direction along the axis. In this way, a hydrostatic bearing pad type rotating device having highly precise rotation performance can be provided. | 05-20-2010 |
20100127588 | Motor - A motor includes a base, a stator, a bearing, a positioning member and a rotor. The base includes a shaft tube. The stator is mounted around the shaft tube. The bearing is received in the shaft tube. The positioning member is fixed to an end of the shaft tube and has a pressing portion to prevent movement of the bearing in the shaft tube. A plurality of retaining plates is formed on the positioning member. Each retaining plate has a retaining end. The rotor includes a shaft having an annular groove formed in an outer periphery thereof. The retaining ends of the retaining plates are in the annular groove to avoid departure of the rotor from the base. Consequently, by a single-component design of the positioning member, departures of the rotor and the bearing are both avoided. | 05-27-2010 |
20100141070 | MOTOR WITH RAISED ROTOR - A motor has a stator, a rotor having a shaft, and a sleeve bearing in contact with the rotor shaft. The sleeve bearing also is fixedly secured to the stator. Additionally, the motor also has a movable support member axially supporting the shaft. The movable support member illustratively is movable relative to the shaft. The rotor center of gravity coincides approximately with the opening in the bearing-shaft interface. | 06-10-2010 |
20100141071 | MOTOR ASSEMBLY WITH MULTIFUNCTIONAL COMPONENTS - Multifunctional components enable the construction of economical motor assemblies. A first embodiment of the present invention provides a hub, cup, spindle, and base assembly for a motor assembly having at least one journal bearing, at least one thrust bearing, and at least one fluid seal. A second embodiment of the present invention provides a hub, spindle, and base with integrated cup assembly for a disc drive bearing having at least one journal bearing, at least one thrust bearing, and at least one fluid seal. In a third embodiment, a hub is rotatably assembled with a spindle coupled to a thrust bearing, prior to assembly with a base. In further embodiments, motor assemblies comprise the above embodiments combined with stator and rotor assemblies. | 06-10-2010 |
20100148606 | Spindle motor - The present invention provides a spindle motor which has superior operating characteristics. The spindle motor includes a stationary support shaft which is fastened to a base plate, a thrust plate which is fitted over the stationary support shaft, a sleeve which is rotatably provided around the stationary support shaft and is coupled to a rotor casing, and an annular stopper which is fastened to the sleeve or the rotor casing to support the lower surface of the thrust plate and prevent the sleeve from being removed. A first fluid sealing part is formed between the stopper and the thrust plate. The spindle motor further includes an annular sealing cap which is coupled to the sleeve or the rotor casing to store fluid between the sealing cap and an upper surface of the sleeve. A second fluid sealing part is formed between the sealing cap and the stationary support shaft. | 06-17-2010 |
20100148607 | BEARING DEVICE, SPINDLE MOTOR AND DISK DRIVE APPARATUS - A bearing device includes a shaft, a sleeve and a thrust plate. The shaft includes a convex portion having a curved surface provided at one end thereof. The sleeve includes an inner circumferential surface opposed to an outer circumferential surface of the shaft. The thrust plate includes a concave portion having a curved surface and arranged to make contact with the convex portion of the shaft. The shaft is supported by the sleeve and the thrust plate such that it may rotate about the central axis with respect to the sleeve and the thrust plate. A curvature radius of the concave portion is greater than a curvature radius of the convex portion but equal to or smaller than about 2.0 times of the curvature radius of the convex portion. | 06-17-2010 |
20100148608 | SPINDLE MOTOR - The spindle motor includes a rotating shaft, a rotor cover which is secured to the rotating shaft and rotates the rotating shaft, a bearing for rotatably supporting the rotating shaft, a holder for holding the bearing, and a holding magnet which is directly mounted to an inner wall of the rotor cover. In this case, the holding magnet is positioned above the bearing to prevent oil from being discharged from the bearing to the outside. | 06-17-2010 |
20100156218 | Spindle motor - Disclosed herein is a spindle motor which prevents a sleeve from being deformed because of residual stress during the welding of a stopper for preventing the removal of a rotating shaft to which a thrust plate is coupled. The spindle motor includes a rotating shaft having a thrust plate which is fitted over the upper portion of the rotating shaft to be perpendicular to the rotating shaft. A sleeve accommodates the rotating shaft to rotatably support the rotating shaft. A stopper is coupled to the sleeve to support the upper surface of the thrust plate, thus preventing the removal of the rotating shaft. A stress-blocking groove is formed in the sleeve in such a way as to be adjacent to the stopper, and prevents the sleeve from being deformed by residual stress generated when the stopper is coupled to the sleeve. | 06-24-2010 |
20100164313 | AXIAL FLUX ELECTRICAL MACHINE - An axial flux electrical machine including a housing, a stator located within the housing, a rotatable shaft carried by the housing by means of at least a main bearing, and a rotor fixed to the shaft within the housing. Magnetic attractive forces between the rotor and the stator produce an axial thrust on the main bearing and a biasing means (preferably in the form of a spring) is arranged to urge the shaft in a direction opposite to the axial thrust so as to reduce the net load on the main bearing. This reduction in net load on the main bearing increases bearing life and improves motor efficiency. | 07-01-2010 |
20100164314 | MOTOR - A motor may include a rotation shaft, a bearing for supporting a shaft end of the rotation shaft, a bearing holder for supporting the bearing, and an urging member provided with a spring part for urging the bearing toward the rotation shaft. The urging member is slid in a mounting direction intersecting the motor axial line direction to be mounted on the bearing holder. The urging member includes a bottom plate part, a side plate part protruded from the bottom plate part and a hook part engaged with the bearing holder. A detachment prevention mechanism is provided for preventing the urging member from detaching from the bearing holder and the detachment prevention mechanism is provided with an engaging projection protruded from the hook part and an engaging recessed part recessed from a front end face of the bearing holder. | 07-01-2010 |
20100187927 | SPINDLE MOTOR - Disclosed herein is a spindle motor which is capable of more easily controlling an axial gap and levelness between the thrust plate of a rotating shaft and a sealing cap. The spindle motor includes a rotating shaft having a thrust plate which is perpendicularly inserted into the upper portion of the rotating shaft. A sleeve accommodates the rotating shaft and rotatably supports the rotating shaft. The sleeve is secured to a plate. A sealing cap is secured to the sleeve through laser welding in such a way as to face the upper surface of the thrust plate. At least part of the sealing cap is stepped towards the thrust plate to correspond to a degree of deformation occurring during the laser welding. | 07-29-2010 |
20100187928 | MOTOR - A motor is disclosed. The motor can include a shaft, a bearing that rotatably supports the shaft, a rotor that is coupled to the shaft and to which at least one magnet is coupled, a stator having one side facing the magnet, a base supporting the bearing, and an attachment portion interposed between the base and one side of the stator. The spindle motor may be used to firmly secure the stator to the base, while minimizing the transfer of vibrations from the stator to the base to improve the noise and vibration properties of the spindle motor. | 07-29-2010 |
20100207469 | COOLING FAN WITH QUICK ASSEMBLING STRUCTURE - A cooling fan includes a base having a hollow bearing cup for receiving a bearing therein, a motor winding support mounted to a top of the bearing cup, and a blade hub mounted atop the motor winding support. The bearing cup is externally provided with channels and stop portions communicating with the channels. Each of the stop portions includes a recess and a projection. The motor winding support is internally provided with stoppers corresponding to the stop portions. Each of the radial stoppers includes a raised portion for engaging with the recess, and a sideward extended portion for abutting on a bottom of the projection. The motor winding support can be rotated to lock to the bearing cup through engagement of the stop portions with the radial stoppers. No glue dispensing is needed, and the problems of a deformed bearing and noise during fan operation are avoided. | 08-19-2010 |
20100231074 | FLUID DYNAMIC BEARING DEVICE AND MANUFACTURING METHOD THEREFOR - To provide a fluid dynamic pressure bearing device that achieves high rigidity against moment without degradation in assembly precision and bearing performance, bearing sleeves are arranged in an axial direction and coaxiality of radial bearing surfaces formed on inner peripheral surfaces of the bearing sleeves is set to 3 μm or less. This secures width precision between the radial bearing gaps to prevent a degradation in bearing performance and a failure such as wear etc. caused by contact between a shaft member and the bearing sleeves. Further, a first radial bearing surface and a second radial bearing surface are provided on at least one sleeve, and this allows a sleeve assembly constructed from the bearing sleeves to be supported at least three positions in the axial direction in a process of assembling the sleeve assembly. As a result, assembly work can be carried out with two bearing sleeves prevented from being bent at a midway thereof, and highly accurate coaxiality between both the bearing sleeves is secured. | 09-16-2010 |
20100237730 | MOTOR - A motor is disclosed. The motor in accordance with an embodiment of the present invention can include: a shaft; a bearing supporting the shaft to rotate; a thrust plate supporting a lower end of the shaft a boss joined to the shaft and having a ring-shaped groove on a side facing the bearing; and a rotor joined to the boss. | 09-23-2010 |
20100244601 | FLUID DYNAMIC BEARING DEVICE - Provided is a fluid dynamic bearing device, which fixes a lid member ( | 09-30-2010 |
20100244602 | TUBULAR INDUCTION MOTOR WITH TWO DIRECTIONS OF ROTATION FOR HOME-AUTOMATION APPLICATIONS - Tubular induction motor ( | 09-30-2010 |
20100264767 | Bearing and Spindle Motor - Provided is a sintered bearing with oil for a spindle motor. The bearing is characterized in that at least one portion of upper and lower sides of the bearing is denser than other portions of the bearing. | 10-21-2010 |
20100264768 | PERMANENT MAGNET MACHINE WITH CONICAL STATOR - A permanent magnet machine includes a stator, a rotor configured to coaxially rotate with respect to the stator and having a plurality of permanent magnets coupled thereto, and an air gap between the stator and the rotor having a magnitude that is continuously adjustable. The air gap may be adjusted to optimize torque, minimize back EMF, or optimize any characteristic of the permanent magnet machine during rotation. | 10-21-2010 |
20100270881 | FLUID DYNAMIC BEARING - The invention relates to a fluid dynamic bearing system having a stationary bearing component and a moving bearing component, that are separated from one another by a bearing gap filled with a bearing fluid. There are two radial bearing regions separated from one another and marked by radial bearing grooves. A separator region having a larger bearing gap width is disposed between the radial bearing regions. The radial bearing grooves of the two radial bearing regions have inner ends facing each other and outer ends facing away from each other. At least the outer ends of the radial bearing grooves are connected to each other by connecting grooves. According to the invention, wear zones provided especially for this purpose are disposed adjoining the connecting grooves, so as to prevent material wear at other regions of the bearing. | 10-28-2010 |
20100277019 | Electric Motor Endshield Having Variable Bearing Arrangement - An electric motor assembly includes a stator assembly and a rotor assembly having a shaft disposed within a motor case. The motor case includes an endshield with a centrally disposed bearing-receiving core that is configured to receive any one of a plurality of bearing assemblies, including at least a ball bearing and a self-aligning bearing, for rotatably supporting the shaft. The core includes a bearing assembly engagement surface with a generally cylindrical first portion and a generally frustoconical second portion, such that any of the selected bearings received therein directly contacts and engages the first surface portion or the second surface portion. | 11-04-2010 |
20100283344 | Inner-Rotor-Type Motor - An inner-rotor-type motor according to the preferred teachings of the present invention includes a housing, a stator, a rotor and a bearing seat. The stator is received in an assembly space of the housing. The rotor is rotatably positioned in the housing via a bearing and extends through a through-hole of the stator. The bearing seat includes a socket having a first recess and second recess and couples to the assembly opening of the assembly space. A stopper is at least a part of the upper wall of the socket and arranged between the first recess and the second recess. The bearing can pass through an end of the socket and be positioned in the first recess, while a circuit board can pass through another end of the socket and be positioned in the second recess. Accordingly, the assembly is simplified and the assembly convenience is improved. | 11-11-2010 |
20100289361 | Cryogenic submerged turbine generator with hydrostatic bearings - A cryogenic submerged turbomachine equipped with one or more combinations of hydrostatic bearings, touchdown ball bearings, thrust bearings, and bushings. The pressurized fluid or gas introduced to the hydrostatic bearing creates a film of lubrication around at least one shaft of the turbomachine. A first combination includes at least a hydrostatic bearing or a pressurized journal bearing. A second combination includes a ball bearing and a thrust disk type bearing acting as a touchdown bearing. This second combination supports the rotor system of the turbine during transient periods when the Thrust Equalizing Mechanism device is not active, and decreases the axial thrust load during operation. A third combination uses a hydrostatic bearing with a sleeve that is joined as a unit with one or more ball bearings acting as touchdown ball bearings on the hydrostatic bearing sleeve. | 11-18-2010 |
20100289362 | ELECTRIC MOTOR WITH ULTRASONIC NON-CONTACT BEARING - A piezoelectric ultrasonic suspension in gas for creating a contactless bearing support of a precision instrument and specifically an electromagnetic motor. A gas micro-film of elevated pressure is formed between the adjoining surfaces of a spherical saddle and a spherical trunnion. The spherical trunnion is spaced apart from the spherical surface of a saddle by a gas micro-film when the piezoresonator is excited. | 11-18-2010 |
20100295397 | Electromechanical Machine - An electromechanical machine capable of functioning as an electric motor or generator/alternator with a wound rotor fitted between wound coaxial stator elements that engage magnetically both the inner and outer circumference of the rotor. The rotor is excited via conduction thru the ball bearings via a commutation device that provides for simultaneous excitation of the stator elements and the rotor. | 11-25-2010 |
20100295398 | MOTOR - A motor may include a rotation member, a bearing which is fixed to the rotation member, and a support shaft by which the rotation member is rotatably supported through the bearing. The bearing may include a first bearing part, which rotatably supports the rotation member, and a second bearing part which rotatably supports the rotation member by an urging part that is urged on a rotation center side. A first end part of the rotation member may have a third bearing part which rotatably supports the rotation member. The first bearing part may be provided at a second end part of the rotation member, a lubricant filling space filled with a lubricant may be formed between the first bearing part and the third bearing part, and the second bearing part may be disposed within the lubricant filling space. | 11-25-2010 |
20100314958 | BRUSHLESS MOTOR - A brushless motor is provided which has excellent anti-impact properties and is easily assembled even if the brushless motor is reduced in size. A stator ( | 12-16-2010 |
20100314959 | ROLLING BEARING DEVICE AND ELECTRIC GENERATOR - The invention is aimed, in a rolling bearing device, to improve its durability by appropriately attenuating vibration of a rotating shaft by means of a high level of dumping performance, and thereby to reduce the load imposed on the rolling bearing and/or the overall system. A rolling bearing device of the present invention comprises a rolling bearing ( | 12-16-2010 |
20100327686 | Rolling Bearing having Internal Lubrication - Rolling bearing having an inner ring ( | 12-30-2010 |
20110001378 | STEP MOTOR - Disclosed herein is a PM type step motor used to move a camera or an optical pickup lens of media related equipment. In the step motor, coupling holes are formed in the central portions of both sides of a casing unit thereof, a bushing is press-fitted or inserted into an associated coupling hole, and a ring member is press-fitted over the outer circumference of the bushing protruding outward from the coupling hole such that the bushing is secured to the casing unit, thus preventing the bushing from becoming separated from the casing unit. The step motor can be freely applied to peripheral device modules of various outer diameters using the ring member. | 01-06-2011 |
20110012455 | Bearing - A bearing ( | 01-20-2011 |
20110025151 | Fluid Dynamic Bearing Motor For Use With A Range Of Rotational Speed Rated Disc Drive Memory Device Products - A fluid dynamic bearing motor and method are provided for use with various disc drive memory device products differently rated by operational rotational speed. The operational speeds are those speeds measured during reading and writing memory operations to the memory device. In an aspect, the present invention meets full operating requirements, including stiffness and power requirements, at multiple rated speeds for use with either standard or high-end performance disc drive products. Costs associated with a dedicated manufacturing line for high-end products are substantially reduced. A single manufacturing line can serve both standard and high-end disc drive memory device products. The present invention is especially useful in reducing costs of 2.5 inch notebook products that are typically marketed in two levels of performance, namely, 5400 RPM standard performance products and 7200 RPM high performance products. | 02-03-2011 |
20110025152 | COMPACT HIGH POWER ALTERNATOR - An apparatus for converting between mechanical and electrical energy, particularly suited for use as a compact high power alternator for automotive use and “remove and replace” retrofitting of existing vehicles. The apparatus comprises a rotor with permanent magnets, a stator with a winding, and a cooling system. Mechanisms to prevent the rotor magnets from clashing with the stator by minimizing rotor displacement, and absorbing unacceptable rotor displacement are disclosed. The cooling system directs coolant flow into thermal contact with at least one of the winding and magnets, and includes at least one passageway through the stator core. Various open and closed cooling systems are described. Cooling is facilitated by, for example, loosely wrapping the winding end turns, use of an asynchronous airflow source, and/or directing coolant through conduits extending through the stator into thermal contact with the windings. | 02-03-2011 |
20110031832 | FAN SEAT STRUCTURE - A fan seat structure includes a seat and a snap-fitting member. The seat is formed on a top with a supporting face, from where a bearing cup is upward extended; and a portion of the seat corresponding to the bearing cup is formed into a central passage. The snap-fitting member is assembled to the seat at the central passage, and is integrally formed with a hollow tubular section upward extended toward the bearing cup; and a limiting section and a pressure-proof section are integrally provided in the hollow tubular section. With the snap-fitting member, a cooling fan can have simplified structure and be more stably and reliably assembled, ensuring the cooling fan to have enhanced performance and be manufactured at reduced time, labor and cost. | 02-10-2011 |
20110031833 | Motor and driving device for recording disk - A motor includes a sleeve supporting a shaft such that an upper end of the shaft protrudes upwardly along an axial direction, a sleeve housing in which an outer diameter portion of the sleeve is inserted and supported, an oil sealing cap covering the sleeve at an opposite side of the sleeve housing, and having a sealing protrusion protruding from a top surface thereof to form a capillary seal of oil between the shaft and the sleeve, and a hub base pressure-fitted and fixed on the upper end of the shaft, and having a hub-base outer diameter portion facing the sealing protrusion and forming a first oil sealing part with the sealing protrusion. | 02-10-2011 |
20110031834 | MOTOR - A motor is disclosed. In accordance with an embodiment of the present invention, the motor includes a rotational axis, a rotating body, which rotates together with the rotational axis as one unit, a hub having a ring-shaped body and a protruding part, in which the ring-shaped body is interposed between the rotational axis and the rotating body and the protruding part is protruded from the ring-shaped body towards the rotational axis and is in contact with the rotating body so as to extend an outer circumferential surface of the ring-shaped body coupled to the rotating body, and a housing, which supports and rotates the rotational axis, in which the housing having a supporting part is interposed between the rotational axis and the protruding part of the hub and supports the rotational axis. Thus, the rotor can be safely supported, providing the rotational stability of the rotor. | 02-10-2011 |
20110031835 | MOTOR - An automated manual transmission comprises a hydraulic pump and a motor for driving the hydraulic pump. The motor comprises a stator and a rotor rotatably mounted to the stator, the stator comprising a housing and a motor end cap fixed to the housing, the rotor comprising a rotatable shaft rotatably supported by a bearing which is installed to the end cap. The bearing comprises an inner race, an outer race, rollers disposed between the inner race and the outer race, and roll holder for holding the rollers. A ring-shaped seal member is arranged at one axial end of the bearing to seal the gap between the inner race and outer race. The end cap is molded at outer peripheral surface of the outer race. | 02-10-2011 |
20110050015 | Hydrodynamic bearing assembly and motor including the same - A hydrodynamic bearing assembly includes a sleeve rotatably supporting a shaft, a thrust plate housing portion extending to an upper side of the sleeve in an axial direction so as to house a thrust plate, and a stopper ring housing portion stepped in an upper side of the thrust plate housing portion in the axial direction and housing a stopper ring for fixing the thrust plate. The stopper ring protrudes from the stopper ring housing portion such that an outer circumferential surface of the stopper ring has a larger height than an inner circumferential surface of the stopper ring housing portion. | 03-03-2011 |
20110057527 | HYDRODYNAMIC TYPE OIL-IMPREGNATED SINTERED BEARING - A hydrodynamic type oil-impregnated sintered bearing includes a porous bearing body of sintered metal having a bearing surface in which hydrodynamic pressure generating grooves slating against an axial direction are provided. Lubricating oil or the base oil of lubricating grease to be impregnated into the bearing body is selected from among (a) mixtures of poly-α-olefin or hydrogenated compound thereof and ester and (b) ester. The ester is preferably polyol ester. In the cases of the lubricating grease, the thickener of the lubricating grease is preferably composed of urea compound. A plurality of bearing surfaces may be formed on the inner periphery of the bearing body so as to be separated from one another. The hydrodynamic type oil-impregnated sintered bearing may be suitably applied to a spindle motor for information equipment. | 03-10-2011 |
20110068649 | BRUSHLESS DC MOTOR - A brushless direct current motor for use in a HVAC system, has a stator and a rotor rotatably mounted to the stator. The stator has a stator core, field windings wound on the stator core and a bushing. The rotor has a shaft rotatably supported by the bushing and adapted to connect with a valve adjuster of the HVAC system. The rotor also has at least one permanent magnet fixed with respect to the shaft. The bushing is a monolithic construction with two journal portions and one middle portion. The two journal portions support the shaft and are formed at respective axial ends of the middle portion. The middle portion has an inner diameter larger than an outer diameter of the shaft at portions corresponding to the middle portion, so as to form a gap between the middle portion and the shaft. | 03-24-2011 |
20110068650 | Fluid dynamic bearing motor, and recording-medium driving apparatus - A fluid dynamic bearing includes a shaft member engaged with a circular plate extending radially outward therefrom; a support including a cylinder rotatably accommodating the shaft member, an outer surface of the support having a tapered portion toward an axial upper surface thereof opposing the circular plate; a stopper, an inner surface of the stopper having a constant diameter in an axial direction in a portion opposite to the tapered portion of the support so as to form a tapered gap with respect to an outer surface of the support located under the axial upper surface of the support; and a working fluid placed between the inner surface of the stopper and the outer surface of the support. | 03-24-2011 |
20110074236 | Self Contained Bearing Lubrication System for High Speed Induction Motor Operating on Oil Ring Lubricated Hydrodynamic Bearings - A lubrication system for an electrodynamic machine, for example an induction motor that has a housing including therein an internal oil sump and at least one oil ring hydrodynamic bearing, wherein the oil ring is in fluid communication with oil in the internal oil sump and replenishes oil in the bearing. The lubrication system functions independently and in parallel to the oil ring lubrication system and includes an electrically powered oil sump pump that is oriented within the internal oil sump. An oil intake is coupled to the oil sump pump and is in fluid communication with oil in the internal sump. An oil discharge line having a proximal end is coupled to the sump pump discharge. The distal end of the discharge line is oriented proximal the motor bearing, so that oil discharged therefrom replenishes oil in the bearing and shaft journal interface. The lubrication system oil discharge parameters are independent of the motor speed, load or physical orientation, and may be varied by a controller coupled to the oil sump pump. | 03-31-2011 |
20110095631 | SPINDLE MOTOR - A spindle motor is provided. The spindle motor includes a base, a bearing housing, a bearing, a rotation shaft, a stator, a bushing, and a rotor. The bearing housing is installed on the base. The bearing is fixed inside the bearing housing. The rotation shaft is installed to be supported by and rotate on the bearing. The stator is disposed around the bearing housing. The bushing is coupled to the rotation shaft. The rotor is coupled to the bushing to rotate through interaction with the stator. | 04-28-2011 |
20110095632 | MECHANICAL PART AND MANUFACTURING METHOD FOR THE SAME - Reliability of a mechanical part including two parts fixed to each other by an anaerobic adhesive is improved, at least one of the two parts being made of a resin material. After UV treatment is performed on an adhesive surface ( | 04-28-2011 |
20110101807 | Hydrodynamic bearing assembly and motor having the same - A hydrodynamic bearing assembly according to an aspect of the invention may include: a sleeve against which a shaft is supported so that an upper end of the shaft, being compressed and inserted into a hub base of a rotor case, protrudes upwardly in an axial direction; a first oil sealing unit having a first oil interface provided between the hub base and a counterpart component arranged downwardly in the axial direction; and a second oil sealing unit communicating with the first oil sealing unit through a communication channel and being tapered to form a second oil interface inside or outside the sleeve, wherein oil in the first oil sealing unit moves toward the second oil sealing unit along an inner diameter direction by a rotation of the rotor case. | 05-05-2011 |
20110115323 | Hydrodynamic bearing assembly and motor having the same - There is provided a hydrodynamic bearing assembly including: a sleeve against which a shaft is supported so that an upper end of the shaft, being compressed and inserted into a hub base of a rotor case, protrudes upwardly in an axial direction; a first thrust dynamic pressure generating part formed in at least one of a protrusion and the hub base corresponding to the protrusion, the protrusion being formed at an end of the sleeve along an inner diameter direction; and a second thrust dynamic pressure generating part formed around a protruding end portion of the sleeve, the protruding end portion facing an upper portion of a stopper part in the axial direction and the stopper part rotating together with the rotor case. Also, an oil sealing part has an oil interface between an outer circumferential surface of the sleeve along an outer diameter direction and an inner surface of the stopper part. | 05-19-2011 |
20110115324 | Bearing unit, and motor using same - A bearing unit is provided which includes a shaft ( | 05-19-2011 |
20110121671 | SINGLE BEARING MOTOR WITH MAGNETIC ELEMENT - A single bearing motor comprises a fan blade set, a motor set and a fan blade base. The fan blade set has a fan blade hub to join with a spindle fitting with a bearing on the outside thereof. The motor set is attached to the fan blade base and a hollow axial seat is provided in the center of the fan blade base to receive the bearing. Further, magnetic elements are disposed at the axial seat to avoid internal clearances being created for lack of a preset pressure acting on the bearing casing and balls therein. The balls and the bearing itself can run smoothly to effectively enhance motor operation. | 05-26-2011 |
20110127865 | MOTOR - A motor is disclosed. The motor in accordance with an embodiment of the present invention includes a base, a shaft, which has an end part coupled to the base, a housing, which has a hollow part formed therein in such a way that the shaft rotatably supports the housing and in which the other end part of the base is inserted into the hollow part, and a rotor case, which includes an insertion hole and a supporting wall. The insertion hole has the housing inserted therein, and the supporting wall supports an outer circumferential surface of the inserted housing. | 06-02-2011 |
20110127866 | MOTOR - A motor is disclosed. In accordance with an embodiment of the present invention, the motor includes a base, a shaft, which has an end part thereof coupled to the base, a stopper, which is coupled to the shaft and has a latch protruded in a direction of diameter of the shaft, a housing, which includes a hollow part, a ledge and an entrance and exit groove, and a rotor case, which is coupled with the housing. Here, the other end part of the shaft is inserted into the hollow part, the ledge is protruded inwardly in the hollow part such that the latch is caught, and the entrance and exit groove is penetrated through the ledge so as to allow the latch to enter and exit the entrance and exit groove | 06-02-2011 |
20110127867 | Bearing assembly and scanning motor - There is provided a bearing assembly including: a sleeve having a hole; a shaft rotatably disposed in the hole; a thrust plate in contact with the end of the shaft to reduce friction in rotation of the shaft; and a holder accommodating the sleeve and the thrust plate and having a contact surface in contact with the thrust plate. | 06-02-2011 |
20110133586 | Arrangement to Compensate a Non-Uniform Air Gap of an Electric Machine - An arrangement to compensate a non-uniform air gap, which is located in an electric machine is provided. The electrical machine includes a stator arrangement and a rotor arrangement. The rotor arrangement rotates around a longitudinal axis. At least parts of the rotor arrangement interact with parts of the stator arrangement to generate electrical power. The air gap is defined by the distance between the parts of the rotor arrangement and the parts of the stator arrangement. The parts of the stator arrangement are opposite to the parts of the rotor arrangement along a certain length. The cross section of the air gap changes along this length thus the air gap is not uniform in view to the referred certain length. The flux density of magnets, which are part of the rotor arrangement, is changed in dependency to the cross section of the air-gap. | 06-09-2011 |
20110156516 | Motor - A motor comprises a base, a stator and a rotor. The base is equipped with a non-metal shaft tube having an outer circumferential wall and an inner circumferential wall opposite to the outer circumferential wall. An opening is formed on an end of the non-metal shaft tube. At least one bearing is fitted inside the non-metal shaft tube and has an axial hole. A plurality of close-fitting portions is formed between an outer circumferential surface of the bearing and the inner circumferential wall of the non-metal shaft tube. An adjustment gap is formed between each two adjacent close-fitting portions within a circumference of the non-metal shaft tube. The stator is equipped on the base. The rotor has a shaft coupled with the axial hole of the at least one bearing. | 06-30-2011 |
20110156517 | STEP MOTOR - Provided is a step motor including a rotor in which a lead screw is coupled with a magnet; a stator in which the rotor is rotatably inserted and which applies a magnetic field to the rotor; a thrust bearing which supports an end of the lead screw; a housing in which the stator is received, and a guide part opened at one side thereof is protruded, and the thrust bearing is inserted into the guide part; a plate spring which is provided at an opened portion of the guide part so as to apply elastic force to the thrust bearing and thus inhibit deviation of the lead screw and the thrust bearing; and a plate spring guide which is fixed to an outside of the guide part of the housing so that the plate spring is inserted therein. | 06-30-2011 |
20110163621 | SPINDLE MOTOR AND MANUFACTURING METHOD THEREOF - A spindle motor is provided, the motor including a bearing assembly including an upper end-opened cylindrical bearing housing and a bearing inserted into the bearing housing and formed with a rotation shaft hole, a stator including a core coupled to a periphery of the bearing housing and formed with at least one core through hole that passes an upper surface and a bottom surface, and a coil wound on the core, a base plate including a floor plate opposite to the bottom surface of the core and a core fixture protruded from the floor plate to be coupled to the core through hole, and a rotor including a rotation shaft coupled to the rotation shaft hole, a yoke coupled to the rotation shaft, and a magnet formed at the yoke in opposition to the core. | 07-07-2011 |
20110169359 | ASSEMBLY STRUCTURE OF BEARING AND HOLDER OF BRUSHLESS DC MOTOR - Disclosed herein is an assembly structure of a bearing and a holder of a brushless DC motor. The bearing is forcibly fitted into a hollow space formed through the holder. A beveled mouth edge is formed on the upper end of the circumferential inner surface of the holder through which the bearing enters the holder. Therefore, the assembly structure can enhance the workability of the process of assembling the bearing with the holder. | 07-14-2011 |
20110187216 | HYDRODYNAMIC DISC DRIVE SPINDLE MOTORS HAVING HYDRO BEARING WITH LUBRICANT INCLUDING CONDUCTIVITY INDUCING AGENT - Disc drive spindle motor having hydro bearing including a stationary member; a rotatable member which is rotatable with respect to the stationary member; and a hydro bearing interconnecting the stationary member and the rotatable member and having working surfaces separated by a lubricating fluid, wherein the lubricating fluid includes at least one synthetic ester base fluid having a viscosity index of at least 110; from 10 to 5000 ppm of at least one conductivity inducing agent; from 0.01% to 5% by weight, based on the total weight of the lubricating fluid, of at least one antioxidant; and from 0.01% to 5% by weight, based on the total weight of the lubricating fluid, of at least one antiwear additive. | 08-04-2011 |
20110193437 | DRIVING DEVICE, IN PARTICULAR ELECTRIC MOTOR, FOR DRIVING A UNIT - A driving device ( | 08-11-2011 |
20110210630 | PLASTIC PACKAGE MOTOR - A plastic package motor, including at least a plastic package stator ( | 09-01-2011 |
20110254395 | ELECTRICAL MOTOR HAVING ROTOR SUPPORT SHIELD - A bearing change in an electrical motor and in particular a generator having permanent magnetic excitation should be able to be carried out safely. To this end, the invention relates to an electrical motor having a shaft ( | 10-20-2011 |
20110285231 | FLUID DYNAMIC BEARING SYSTEM AND A SPINDLE MOTOR HAVING THIS KIND OF BEARING SYSTEM - The invention relates to a fluid dynamic bearing system having a bearing bush and a shaft that are rotatable with respect to one another about a common rotational axis and form a bearing gap filled with bearing fluid between associated bearing surfaces. The bearing surfaces form at least one fluid dynamic radial bearing. A rotor component is disposed on the shaft. A stopper ring is disposed on the shaft or on the rotor component and adjoins the bearing bush, wherein a gap is formed between the mutually facing surfaces of the bearing bush and the stopper component that is filled with a bearing fluid and connected to the bearing gap and extends substantially in a radial direction. According to the invention, the surfaces of the bearing bush and/or the stopper component are formed such that the gap is tapered, narrowing radially outwards. Moreover, a recirculation channel may be provided in the bearing bush that connects a gap region between the bearing gap and the sealing gap radially outside the axial bearing to a gap region radially outside the stopper component. | 11-24-2011 |
20110285232 | SHOCK RESISTANT FLUID DYNAMIC BEARING MOTOR - A system, method and means is provided for withstanding mechanical shock for use with fluid dynamic bearings. A sealing system is provided that withstands | 11-24-2011 |
20110309701 | MOTOR ASSEMBLY - A motor assembly includes a flexible base mount having an axial tube, a rigid outer mounting shell member inserted into and retained to the axial tube by retaining and retained members disposed therebetween, a stator winding subassembly surrounding the outer mounting shell member and supported by resting on a surrounding ledge of the axial tube, a plug member engaging in a socket cavity of the outer mounting shell member, a flexible inner mounting shell member inserted into the outer mounting shell member, a rotating shaft of a rotor subassembly received in the inner mounting shell member and rotatably born by an antifriction bearing, and an upper positioning ring resting on the bearing. Leakage of lubricant and deformation of the inner mounting shell member can be prevented. | 12-22-2011 |
20120013213 | Hydrodynamic bearing assembly and motor having the same - There is provided a hydrodynamic bearing assembly and a motor having the same. The hydrodynamic bearing assembly includes a sleeve having a shaft inserted thereinto; a hub base coupled to an upper portion of the shaft and rotating together with the shaft; a stopper plate fixedly coupled to an upper surface of the sleeve and preventing the shaft from lifting while the shaft rotates; and a thrust dynamic pressure generating groove formed on at least one of an upper surface of the stopper plate and a lower surface of the hub base corresponding thereto. | 01-19-2012 |
20120013214 | Bearing Assembly - A bearing assembly for an electrical motor, including a shaft, a housing, and a main bearing between the shaft and the housing, the shaft being surrounded by a rigid sleeve for functioning as an auxiliary bearing in case of a breakdown of the main bearing and as a grease sealing under normal operation. | 01-19-2012 |
20120025647 | SPINDLE MOTOR - Disclosed herein is a spindle motor. The spindle motor includes a rotor and a stator. The rotor includes a rotating shaft and a rotor casing which is provided with a magnet. The stator rotatably supports the rotor. The stator includes an armature facing the magnet. When the rotor casing rotates at a low speed, the rotating shaft rotates in a state of being inclined at a predetermined angle with respect to the vertical direction in which the rotating shaft is upright on the stator. Therefore, because the rotating shaft rotates in the state of being inclined with respect to the stator, the rotor can uniformly rotate. If the spindle motor is used in an optical disk apparatus for forming a label surface on an optical disk, the quality of the image on the label surface of the optical disk can be enhanced. | 02-02-2012 |
20120032543 | OIL COMPOSITION COMPRISING FUNCTIONALIZED NANOPARTICLES - An improved oil composition is disclosed. The oil composition includes a base oil comprising a hydrocarbon, the base oil having a base thermal conductivity. The oil composition also includes a first additive comprising a plurality of derivatized first additive nanoparticles dispersed within the base oil to form a modified oil having a modified thermal conductivity, wherein the modified thermal conductivity is greater than the base thermal conductivity. Alternately, an improved oil composition includes a base oil comprising a hydrocarbon and a first additive comprising a plurality of derivatized first additive nanoparticles dispersed within the base oil to form a modified oil comprising a stabilized suspension of the derivatized first additive nanoparticles in the base oil. | 02-09-2012 |
20120032544 | VEHICLE DRIVE DEVICE - In a rotating electrical machine configured with a rotor and stator, a lubricant supply portion is configured to supply a lubricant from within. A communication passage is provided in either the rotor support member or the sensor rotor, and is configured so as to provide a passage from a first space, which extends radially outward from the axial first direction side of the sensor rotor and is formed between the support wall and the rotor support member, with a second space, which is formed between the sensor rotor and the rotor support member. The case of the machine has a support wall extending at least in a radial direction to an axial first direction side, which is one side in an axial direction of the rotating electrical machine, and after lubricating the bearing, the lubricant is discharged from the second space to the first space through the communication passage. | 02-09-2012 |
20120038231 | MOTOR DEVICE - Provided is a motor device in which the entire length of a motor can be shortened as much as possible while the positional deviation of a shaft in a thrust direction is prevented and a shaft length sufficient to suppress the inclination of the shaft can be ensured. A motor device provided with a shaft with a rotor fixed on the outer surface thereof, and a thrust pressurization unit that supports an end opposite the output side of the shaft while pressurizing the end in an axial direction may be configured so that the thrust pressurization unit may be provided with a coil spring that pressurizes the end opposite the output side of the shaft in the axial direction and the thrust pressurization unit may be disposed inside the rotor. | 02-16-2012 |
20120043842 | Hydrodynamic bearing assembly and motor including the same - Disclosed are a hydrodynamic bearing assembly and a motor including the same. The hydrodynamic bearing assembly may include a sleeve supporting a shaft to allow a top portion of the shaft to be protruded upwardly in an axial direction and including a coupling part of which a bottom end is protrusively formed, a base cover coupled with a bottom of the sleeve in the axial direction while maintaining a gap therebetween, and support part formed at an outer end portion of the base cover and formed to be protruded in the axial direction such that an outer peripheral surface thereof is in contact with and coupled to an inner peripheral surface of the coupling part of the sleeve. | 02-23-2012 |
20120056501 | ROTOR SHAFT AND AC GENERATOR FOR VEHICLE - A rotor shaft is supported in a rotatable manner at both ends by bearings respectively disposed to a housing forming a part of a stator and provided with a positioning portion of the bearing in at least one shaft end. The positioning portion is formed of an annular step-like rise portion that abuts on a circular arc surface provided to an inner ring corner of the bearing. A rotor shaft capable of holding the bearing in a stable manner over a long period is thus obtained without increasing the number of components and the numbers of working processes and assembly man-hours for the shaft. It thus becomes possible to solve problems, such as an increase in cost due to a large amount of working margin and increases of the direct material cost and in weight due to a larger finishing diameter of the shaft. | 03-08-2012 |
20120068564 | HYDRODYNAMIC DISC DRIVE SPINDLE MOTOR HAVING HYDRO BEARING WITH LUBRICANT - A lubricating fluid contains a synthetic ester base fluid having a viscosity index of at least 110, from 0.01% to 5% by weight, based on the total weight of the lubricating fluid, of at least one tri-C | 03-22-2012 |
20120091842 | Hydrodynamic bearing assembly and motor including the same - There is provided a fluid dynamic bearing assembly including: a hub coupled to a shaft and rotating together with the shaft; a sleeve supporting the shaft and including a storage groove formed in an upper surface thereof to thereby store oil between the sleeve and the hub; and a protrusion part protruding from one surface of the hub corresponding to the upper surface of the sleeve, allowing the oil to be sealed between the protrusion part and the sleeve, and having an oil interface formed in an outer radial direction thereof. | 04-19-2012 |
20120104889 | Spindle motor - There is provided a spindle motor including: a sleeve including a hollow part having a shaft inserted thereinto and rotatably supporting the shaft; a thrust plate coupled to a lower portion of the shaft in an axial direction to thereby rotate together with the shaft; a cover plate coupled to a lower portion of the sleeve in the axial direction and covering the hollow part; and a step part stepped upwardly from a lower surface of the thrust plate in the axial direction so that the shaft and the thrust plate are easily coupled to each other and having surface roughness greater than that of other portions of the thrust plate. | 05-03-2012 |
20120112587 | Hydrodynamic bearing assembly and motor including the same - Disclosed is a hydrodynamic bearing assembly including: a rotary member fixed to a shaft and rotating in linkage with the shaft; and a sleeve supporting the shaft, wherein a coating film is formed by spraying, at high pressure, a solid lubricant having a single component onto one surface of at least one of the sleeve and the rotary member corresponding to the sleeve. | 05-10-2012 |
20120112588 | ELECTRIC MOTOR AND ELECTRIC DEVICE PROVIDED THEREWITH - Provided is an electric motor driven by an inverter of PWM method, and devised to retard electrolytic corrosion in a bearing. A rotating body of a rotor comprises an outer iron core configuring an outer peripheral portion of the rotating body, an inner iron core configuring an inner peripheral portion connected to a shaft, a dielectric layer disposed between the outer iron core and the inner iron core, a plurality of insertion holes penetrating the outer iron core in the axial direction, and permanent magnets inserted individually in the plurality of insertion holes. It thus becomes possible to increase impedance of the rotor side (inner ring side of bearing) to approximate it to impedance of the stator side (outer ring side of the bearing) to thereby bring high frequency potentials balanced between the inner ring side and the outer ring side of the bearing, so as to provide the electric motor that retards electrolytic corrosion liable to occur in the bearing, and an electric device equipped with the same. | 05-10-2012 |
20120133226 | SLIDE BEARING, SLIDE BEARING UNIT WITH SAME, AND MOTOR WITH THE BEARING UNIT - Provided is a bearing capable of satisfying demands for cost reduction and further quietness, and stably maintaining high support accuracy. A sliding bearing ( | 05-31-2012 |
20120161563 | ELECTRICAL MACHINE HAVING A ROLLER BEARING, WHICH IS PROTECTED AGAINST ELECTRICAL BREAKDOWNS, AND A GEARED MOTOR HAVING SUCH A ROLLER BEARING - In an electrical machine having a roller bearing, whose inner ring is seated on the rotor shaft of the electrical machine, whose outer ring is seated in a housing and which is located in a closed area, the roller bearing is intended to be protected against electrical breakdowns. For this purpose, the area contains a liquid on an aqueous basis, whose level overhangs the external contour of the inner ring at its lowest point. The inner ring and the outer ring are therefore conductively connected and the voltage can be equalized between the rotor and the housing of the electrical machine, without any impediment and without breakdowns. In an application as a geared motor, the lubricant for the gearbox is also a liquid on an aqueous basis. | 06-28-2012 |
20120169165 | SPINDLE MOTOR - There is provided a spindle motor including: a sleeve rotatably supporting a shaft and having an insertion groove provided in a top surface thereof; and a rotor case mounted on a top end of the shaft and including a protruding wall part inserted into the insertion groove, wherein a lubricant, provided to generate a dynamic pressure when the shaft rotates, forms an interface with air in a clearance formed by the protruding wall part and the insertion groove. | 07-05-2012 |
20120169166 | BEARING HAVING A POWER GENERATION UNIT - A bearing, which has a first bearing ring, a second bearing ring and a claw pole generator-type power generation unit. The bearing has a substantially space-neutral power generation unit, which has a high filling factor for the induction coil. Every claw ring is connected to a section of the body of the first bearing ring in a magnetically conducting fashion and the magnetic circuit is substantially closed via the section of the body of the first bearing ring. | 07-05-2012 |
20120175983 | BEARING HAVING A POWER GENERATION UNIT - A bearing, which has a first bearing ring, a second bearing ring, a rolling element interposed between the two bearing rings and a claw pole generator-type power generation unit. The bearing has a substantially space-neutral power generation unit which has a high filling factor for the induction coil. The first claw of the claw ring is connected to a magnetically conducting section of the body of the first bearing ring in a magnetically conducting fashion. The magnetic poles of the pole pairs are mounted so as to be connected to a magnetically conducting section of the body of the second bearing ring in a magnetically conducting fashion and the magnetic circuit is substantially closed via the two magnetic sections and the rolling element. | 07-12-2012 |
20120175984 | DYNAMIC BEARING DEVICE - Disclosed is a dynamic bearing device which allows production of a smaller housing at low cost and which suppresses ion elution from the resin portion to thereby maintain cleanliness in the dynamic bearing device and exert a desired bearing performance. A dynamic bearing device | 07-12-2012 |
20120187789 | Hydrodynamic bearing assembly and motor including the same - There is provided a hydrodynamic bearing assembly including: a sleeve having a shaft inserted thereinto and supported thereby; a thrust plate coupled to one end of the shaft; an extension part formed at the thrust plate to be extended in an axial direction so as to be coupled to the shaft; and a coupling part formed at the shaft to contact an inner surface of the extension part so as to be coupled to the extension part. | 07-26-2012 |
20120205999 | ELECTRIC MOTOR HAVING AN END FRAME - An end frame for an electro-dynamic machine. The end frame includes a radial bearing support surface disposed concentrically about the axis and an axial bearing support surface substantially perpendicular to the axis. A base wall is substantially perpendicular to the axis. A first annular wall is disposed concentrically about the axis and extends from the base wall to the axial bearing support surface. A second annular wall is disposed radially outward of the first annular wall and cooperates therewith to define an annular space that extends from the base wall to the axial bearing support surface. A first boundary wall extends across the annular space from the base wall to the axial bearing support surface. A metering wall extends across the annular space a portion of a distance from the base wall to the axial bearing support surface. The base wall, the axial bearing support surface, the first annular wall, the second annular wall, the first boundary wall and the metering wall cooperate to define a first chamber for receiving grease. | 08-16-2012 |
20120212092 | ROTATING DEVICE HAVING A ROTOR AND A STATOR - The rotating device comprises the rotor to which the magnetic recording disk is to be mounted and a stator rotatably supporting the rotor. The stator includes: a bearing unit rotatably supporting the rotor by generating dynamic pressure in lubricant that intervenes between the rotor and the stator; and a base on which a central hole is formed, the center of the central hole being along the rotational axis of the rotor and the bearing unit being fixed to the central hole. The bearing unit includes the housing and the sleeve. The housing includes: a first outer surface joining the central hole; and a second outer surface formed more radially outward from the rotational axis than the first outer surface, the second outer surface partly overlapping the first outer surface in the axial direction. | 08-23-2012 |
20120217831 | SYSTEMS AND METHODS FOR IMPROVED DIRECT DRIVE GENERATORS - Systems and methods for improved generators are described. One embodiment includes an assembly for an axial flux generator, the assembly comprising an arc-shaped rotor section that includes a rotor support configured to rotate around an axis of a generator, and an at least one rotor element for power generation that is connected to the rotor support; an arc-shaped stator section comprising a stator support and an at least one stator element for power generation connected to the stator support; wherein the rotor section and the stator section are configured to provide an axial air gap between the at least one rotor element and the at least one stator element, and wherein the at least one rotor element and the at least one stator element are positioned to be at substantially the same radial distance from the axis of the generator. | 08-30-2012 |
20120217832 | HYDRODYNAMIC BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - Disclosed herein are a hydrodynamic bearing assembly and a motor including the same. The hydrodynamic bearing assembly includes: a sleeve supporting a shaft; and a sleeve housing combined with the sleeve to prevent the leakage of oil; and at least one stepped part formed on at least one of the sleeve and the sleeve housing in order to align an axis of the sleeve with an axis of the shaft and provide a bonding space with the sleeve therebetween. | 08-30-2012 |
20120235526 | FAN AND MOTOR THEREOF - A motor includes a base, a bushing, a bearing structure, a stator structure, a rotor structure and a magnetic element. The base has a supporting platform. The bushing is connected with the base. The bearing structure is disposed in the bushing. The bushing is threaded through the stator structure. The rotor structure has a shaft, and the shaft threads through the bearing structure. The magnetic element corresponds to the shaft and is disposed on the supporting platform, and the magnetic element magnetically interacts with the shaft. A fan equipped with the motor is also disclosed. | 09-20-2012 |
20120248911 | MOLDED MOTOR - Provided is a molded motor that hardly causes electric corrosion in bearings and produces less noise and vibration. Electrical continuity between a bracket | 10-04-2012 |
20120286607 | VEHICLE DRIVE DEVICE - A vehicle drive device including a rotating electrical machine; a through shaft extending through a rotor shaft of the electrical machine; a power transmission mechanism that transmits power between the rotor shaft and the through shaft; a lubricant supply that supplies lubricant inside of the rotor shaft by rotation of the power transmission mechanism; a first bearing placed radially outward of the rotor shaft to support the rotor shaft; and a second bearing placed radially outward of the through shaft to support the through shaft. The lubricant supply includes a lubricant storing portion located between the first bearing and the second bearing at a position below a rotation central axis of the through shaft. The lubricant storing portion has a portion that communicates with an opening located on an axial first direction side of the rotor shaft, at a position above a lowermost part of the opening. | 11-15-2012 |
20120286608 | ROLLING BEARING FOR INVERTER-DRIVEN MOTOR AND INVERTER-DRIVEN MOTOR THEREWITH - A rolling bearing for an inverter-driven motor has the thickness of an oil film in a steady operation condition stably maintained in a specific range, by which the withstand voltage can be controlled, and the discharge due to the shaft voltage of the inverter-driven motor is prevented and electrolytic corrosion can be suppressed. The rolling bearing for an inverter-driven motor has an inner ring, an outer ring, a rolling element, and grease, wherein a root mean square roughness of a raceway surface of at least one of the inner ring and the outer ring is 4 to 16 nm, and an oil film parameter Λ in steady operation is at least 17.5. | 11-15-2012 |
20120293028 | BEARING ASSEMBLY AND SPINDLE MOTOR INCLUDING THE SAME - Disclosed herein are a bearing assembly and a spindle motor including the same. The bearing assembly includes: a shaft having a first magnet formed on an outer circumferential surface thereof; and a sleeve having a second magnet formed on an inner circumferential surface thereof, and spaced apart from the first magnet to face the first magnet, the sleeve supporting the shaft, wherein a spaced gap between the first magnet and the second magnet is filled with oil. According to the present invention, power consumption due to driving of the spindle motor can be reduced by using the bearing assembly included in the magnetic bearing. | 11-22-2012 |
20120293029 | LOCOMOTIVE STARTER MOTOR - In accordance with the present invention, provided is starter motor including a robust end housing or casing for carrying a needle bearing arrangement. The needle bearing arrangement is generally elongated and includes a plurality of rotatable members or rollers which allows wear to spread amongst all its members, thus increasing the field service life of the starter motor. In one aspect, the needle bearing arrangement is one roller bearing. In another aspect, the needle bearing comprises two roller bearings. Also, the drive end housing is longer and larger in diameter to accommodate the larger needle bearing arrangement. | 11-22-2012 |
20120299418 | Bearing assembly and motor including the same - There is provided a bearing assembly and a motor including the same, bearing assembly including: a shaft including a first magnet provided thereon; a sleeve including a second magnet provided therein and disposed to face the first magnet so as to support the shaft; and a damping part disposed at a position at which the first and second magnets have maximum magnetic flux density in order to damp vibrations of the first and second magnets. | 11-29-2012 |
20120299419 | LUBRICATION STRUCTURE OF POWER TRANSMISSION APPARATUS - PROBLEM TO BE SOLVED: A lubrication structure of a power transmission apparatus is provided with a lubricating liquid transport pipe for cooling a rotating electrical machine used to allow a lubricated member positioned axially outwardly of the rotating electrical machine to be lubricated in the axial direction. | 11-29-2012 |
20120299420 | BEARING ARRANGEMENT FOR AN ELECTRIC ENGINE - A bearing assembly for an electric machine with a stator ( | 11-29-2012 |
20120299421 | ELECTRODYNAMIC ENGINE WITH A THREE-POINT SUSPENDED SHAFT AND USAGE OF A THIRD BEARING AS AN ASSISTING SHAFT MOUNT - The electro dynamic machine ( | 11-29-2012 |
20120306303 | SPINDLE MOTOR - Disclosed herein is a spindle motor including a rotating part including a rotating shaft, a hub, and a magnet and a fixing part including a sleeve supporting the rotating shaft and an armature opposite to the magnet, wherein a working fluid is injected between the rotating shaft and the sleeve so as to form a fluid dynamic bearing part, and the sleeve is as a sintered sleeve by sintering and a top and a bottom of an inner peripheral surface of the sleeve is protruded toward the rotating shaft, whereby the spindle motor improving dynamic pumping capability and extending a span of a radial bearing part to a top end and a bottom end of the sleeve as compared with the spindle motor according to the prior art can be provided. | 12-06-2012 |
20120313470 | Motor - There is provided a motor including: a sleeve supporting a shaft and a thrust plate coupled to the shaft through oil; a hub operating together with the shaft and including a magnet coupled thereto; a base including the sleeve and a core coupled thereto, the core including a coil wound therearound; and a base cover coupled to the sleeve to thereby close a lower portion of the sleeve, wherein an interval between the sleeve and the hub is smaller than an interval between the thrust plate and the base cover in order to maintain a state of non-contact between the thrust plate and the base cover. | 12-13-2012 |
20120313471 | THRUST BEARING ASSEMBLY - A thrust bearing assembly for supporting an end surface against an axial load, includes a first part with a chamber; a second part disposed in the chamber and having a load surface facing the end surface; and a third part fixed with the first part and spaced from the second part. A reservoir for storing lubricant is formed in the chamber between the second part and third part. A narrow passage communicates the reservoir with the load surface to allow the lubricant to flow from the reservoir to the load surface to lubricate the interface between the load surface and the end surface when the axial load rotates. | 12-13-2012 |
20120319515 | SPINDLE MOTOR - There is provided a spindle motor including: a sleeve supporting a shaft; and a rotor hub coupled to an upper portion of the shaft to thereby form a bearing clearance with the sleeve, wherein the sleeve and the rotor hub are provided with a plurality of sealing parts for preventing a leakage of a lubricating fluid. | 12-20-2012 |
20120319516 | Shield restricting axial movement - In one example, an FDB motor having a shield member is provided. In one example, the method includes disposing a first member and a second member for relative rotation about an axis of rotation. An annular shield member is attached to the first member, the shield member disposed adjacent a fluid reservoir for containing a bearing fluid. The reservoir is filled through an aperture (e.g., a fill hole) in the shield member. Thereafter, the aperture is at least partially sealed. The aperture may be hermetically sealed via one or more laser pulses. In other examples, a two piece shield is provided for shielding a reservoir without a fill hole. | 12-20-2012 |
20120326542 | EXTERNAL ROTOR MOTOR - An electronically commutated external-rotor motor has an internal stator ( | 12-27-2012 |
20120326543 | BEARING APPARATUS, SPINDLE MOTOR, AND DISK DRIVE APPARATUS - A bearing apparatus includes a stationary shaft, a first annular member, and a rotating member. The rotating member includes a first inner circumferential surface arranged opposite to the outer circumferential surface of the stationary shaft, and a second inner circumferential surface arranged opposite to an outer circumferential surface of the first annular member. A lubricating oil is arranged in a gap between a surface of a stationary member and the rotating member. On an upper side of an upper surface of the lubricating oil, the first annular member and the rotating member are arranged radially opposite to each other with a slight gap defined therebetween, so that a labyrinth seal is defined. The labyrinth seal and a fixing range over which the stationary shaft and the first annular member are fixed to each other are arranged to overlap with each other in a radial direction. | 12-27-2012 |
20130009499 | BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - There is provided a bearing assembly including: a sleeve supporting a shaft; a stopper coupled to the shaft to thereby prevent excessive floating of the shaft; a base cover maintaining a clearance with the stopper to thereby provide a space in which oil is filled and coupled to the sleeve; and a flow prevention part protruding from at least one of the stopper and the base cover to thereby prevent a flowing of the oil. | 01-10-2013 |
20130009500 | SPINDLE MOTOR - There is provided a spindle motor including: a sleeve including a shaft rotatably mounted therein and a circulation hole formed therein; and a cover member mounted on a lower end portion of the sleeve and including an opening/closing part opening and closing the circulation hole. | 01-10-2013 |
20130020893 | Electrical Machines - An electrical machine | 01-24-2013 |
20130020894 | FLUID DYNAMIC BEARING MOTOR, AND RECORDING MEDIUM DRIVING APPARATUS - A motor includes a rotor having a permanent magnet; a sleeve rotatably supporting the rotor; fluid provided in a gap between the rotor and the sleeve; a stator having a electromagnet disposed opposite to the permanent magnet to rotate the rotor relative to the stator; and a boss interposed between the sleeve and the stator. In the motor, the sleeve, the stator, and the boss are provided as separate members. | 01-24-2013 |
20130033137 | Spindle motor - A spindle motor including: a lower thrust member fixedly coupled to a base member; a shaft fixedly coupled to at least one of the lower thrust member and the base member; a sleeve disposed on an upper portion of the lower thrust member and rotatably installed on the shaft; a rotor hub coupled to the sleeve to thereby rotate together with the sleeve; an upper thrust member fixedly coupled to an upper end portion of the shaft and forming a liquid-vapor interface together with the sleeve; and a cover member fixedly coupled to the shaft so as to be disposed on an upper portion of the upper thrust member, wherein the upper thrust member includes a stepped jaw part having a lower surface supported by an upper surface of the shaft and an upper surface pressed by the cover member, so as to increase coupling strength with the shaft. | 02-07-2013 |
20130033138 | Spindle motor - There is provided a spindle motor including: a shaft fixedly coupled to a base member; a stationary unit coupled to the shaft so as to be disposed over the base member; and a sleeve member forming a bearing clearance with the stationary unit to be filled with lubricating fluid, wherein the stationary unit includes a plurality of stationary members and the plurality of stationary members are disposed to be opposed to each other while being spaced apart from each other by a predetermined interval so as to have the lubricating fluid interposed therebetween, the stationary members including a liquid-vapor interface formed therebetween. | 02-07-2013 |
20130033139 | Method of Securing a Sealing Device to a Housing with a Limited Bore Diameter - An apparatus including a seal and a grounding ring along with methods for securing such an apparatus to the housing of a motor. The apparatus comprises an electrically conductive stator including a groove formed in a face thereof. A rotor mates with the stator, wherein the rotor includes a seal groove formed around an inner radius thereof and further comprising a rotor seal disposed in the seal groove. A seal ring is interposed between the stator and the rotor. The stator engages the seal ring around an inner circumference of the seal ring and the rotor engages the seal ring around an outer circumference of the seal ring. A grounding ring is interposed between the stator and the rotor, wherein the grounding ring is electrically coupled to the stator. An electrically conductive adhesive is included for application into the groove and onto the face. | 02-07-2013 |
20130049505 | DISK-ROTATING MOTOR AND DISK-DRIVING DEVICE - A disk-rotating motor includes a rotor section including a rotor magnet attached to a rotor frame and a shaft fixed to a center of the rotor frame, and a stator section including a shaft-bearing which bears the shaft, wherein the stator section includes the shaft-bearing, a shaft-bearing housing which holds the shaft-bearing, a thrust plate which bears the shaft in an axis direction, a stator core which is arranged to face the rotor magnet and provided with wire-winding, a core holder which holds the stator core, and a bracket which holds the shaft-bearing housing. The bracket has a projecting part which fixes the shaft-bearing at a central part thereof, an inner diameter part of the shaft-bearing is press-fitted to be tightened to the projecting part, and an outer diameter part of the shaft-bearing housing is adhered to be tightened to an inner diameter part of the core holder. | 02-28-2013 |
20130049506 | PLAIN BEARING - A plain bearing of a shaft, in particular of an electric-motor drive unit of a motor vehicle, contains a first plain bearing part that surrounds the shaft and a second plain bearing part connected axially to the first plain bearing part. The thermal expansion coefficient of the second plain bearing part is greater than the thermal expansion coefficient of the first plain bearing part. | 02-28-2013 |
20130062981 | Vertical hydraulically suspended armature generator - A power generator ( | 03-14-2013 |
20130069463 | ELECTRIC MOTOR - An electric motor for moving a vehicle part, the electric motor having a stator with a stator housing, a drive shaft rotatable with respect to the stator, a rotor on the drive shaft and having a rotor winding, a commutator on the drive shaft for supplying an electric current to the rotor winding, at least two brushes mounted on the stator housing, the brushes in sliding contact with the commutator for supplying electric current to the rotor winding, a bushing mounted on the drive shaft adjacent to the commutator, and a cone element mounted on the drive shaft adjacent to the bushing on a side of the bushing facing away from the commutator, the cone element having an outer surface which conforms to the shape of a cone concentrical to the drive shaft and having a tip pointing away from the bushing. | 03-21-2013 |
20130069464 | SPINDLE MOTOR AND METHOD FOR MANUFACTURING THE SAME - Disclosed herein is a spindle motor including: a rotor including a shaft, a hub, and a magnet; a stator including a sleeve rotatably supporting the shaft, a base having the sleeve coupled thereto, and an armature facing the magnet and including a core and a coil; and a fluid dynamic bearing part formed between the rotor and the stator by being filled with oil, wherein the armature is coupled to an outer peripheral portion of the sleeve. | 03-21-2013 |
20130069465 | ADHESIVE RESIN COMPOSITION FOR HDD MOTOR AND HDD MOTOR FABRICATED USING THE SAME - There are provided an adhesive resin composition for a hard disk drive (HDD) motor and a HDD motor fabricated by using the same. The adhesive resin composition for a HDD motor adheres fixed members and rotating members of the HDD motor to each other and includes 100 parts by weight of a first resin, 25 to 80 parts by weight of a second resin, a hardness of which after hardening is lower than that of the first resin, and 40 to 100 parts by weight of a hardener. The HDD motor is fabricated by using the adhesive resin composition for a HDD motor including a flexible epoxy resin, whereby reliability of the motor against external impacts may be improved. | 03-21-2013 |
20130076179 | BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - There is provided a bearing assembly including: a sleeve supporting a shaft and including a circulation hole through which oil is circulated; a thrust plate coupled to the shaft and generating dynamic pressure in the oil; and a base cover coupled to the sleeve to thereby close a lower portion of the sleeve, wherein the oil passes through the circulation hole and is then supplemented between the thrust plate and the base cover in order to suppress bubblegeneration due to leakage of the oil filled between the thrust plate and the base cover at the time of rotation of the shaft. | 03-28-2013 |
20130076180 | ROTATING MEMBER FOR MOTOR AND BASE ASSEMBLY FOR MOTOR, AND MOTOR INCLUDING THE SAME - There is provided a rotating member for a motor, the rotating member including: a hub coupled to a shaft system of the motor and rotating together therewith; a main wall portion protruding from one surface of the hub and allowing oil to be sealed between the main wall portion and a sleeve supporting the shaft system; and a pumping portion formed in a lower surface of the main wall portion and generating fluid pressure for preventing a leakage of the oil. | 03-28-2013 |
20130082554 | SPINDLE MOTOR - There is provided a spindle motor including: a lower thrust member fixed to a base member; a shaft fixed to at least one of the lower thrust member and the base member; a sleeve formed above the lower thrust member and provided to be rotatable with the shaft, wherein the sleeve, together with the lower thrust member, forms a lubricating fluid liquid-vapor interface and a lower sealing portion; a rotor hub coupled to the sleeve and rotating together therewith; and an upper thrust member fixed to an upper end portion of the shaft, wherein the upper thrust member, together with the sleeve, forms a lubricating fluid liquid-vapor interface and an upper sealing portion, wherein either of the upper sealing portion and the lower sealing portion has a greater volume of sealed lubricating fluid than the other. | 04-04-2013 |
20130082555 | SPINDLE MOTOR - Disclosed herein is a spindle motor in which oil sealing parts are surface-treated stepwise with respect to oil used as a fluid dynamic bearing, such that sealing of the oil sealing part is enhanced, thereby preventing scattering, or the like, of the oil. According to preferred embodiments of the present invention, oil contact surfaces are surface-treated stepwise in the direction from the inner side of the oil interface formed in the oil sealing part of a fluid dynamic bearing part toward the outer side thereof, thereby making it possible to enhance maintenance of the oil interface. | 04-04-2013 |
20130082556 | HYDRODYNAMIC DISC DRIVE SPINDLE MOTOR HAVING HYDRO BEARING WITH LUBRICANT - A lubricating fluid contains a synthetic ester base fluid having a viscosity index of at least 110, from 0.01% to 5% by weight, based on the total weight of the lubricating fluid, of at least one tri-C | 04-04-2013 |
20130082557 | SPINDLE MOTOR - There is provided a spindle motor including: a sleeve rotatably supporting a shaft; a base member including a protrusion part having the sleeve fixed thereto; and a rotor hub coupled to the shaft and including an extension wall part allowing an interface between a lubricating fluid and air to be formed, together with an outer peripheral surface of the sleeve, wherein an outer peripheral surface of the extension wall part is inclined in order to prevent a scattering of leaked lubricating fluid, together with one end portion of the protrusion part of the base member. | 04-04-2013 |
20130088109 | MOTOR SUPPORT FOR A HYBRID ELECTRIC TRANSMISSION - An assembly for supporting a motor of a vehicle powertrain includes a housing, a stator secured to the housing, a bearing having a radial position established by the housing, a member contacting the bearing, and a rotor secured to the member and including a radial outer surface spaced radially from the stator by an air gap established by contact between the bearing and the member. | 04-11-2013 |
20130099613 | SPINDLE MOTOR - There is provided a spindle motor including: upper and lower thrust parts fixedly installed on a shaft; a reception part formed in the rotor hub to thereby receive an end portion of the upper thrust part and form an oil interface together with the upper thrust part; and a clamp fixing part inserted into the reception part while having a clearance with the upper thrust part, and guiding a position of a clamp for fixing the recording medium. | 04-25-2013 |
20130099614 | Hobby servo blocks - Hobby servo blocks are provided. In certain circumstances, servo blocks may increase a servo's load-bearing capabilities by helping to isolate the lateral load from the servo spline and case. The extreme versatility of servo blocks allow users to create complex, extremely rigid, structures with ease using standard servos. The robust framework acts as a servo exoskeleton, greatly enhancing the mechanical loads the servo can withstand. Additionally, servo blocks may include a hub pattern that is repeated throughout the framework to allow endless attachment options. | 04-25-2013 |
20130106220 | BEARING ASSEMBLY AND SPINDLE MOTOR INCLUDING THE SAME | 05-02-2013 |
20130106221 | Motor | 05-02-2013 |
20130113315 | BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - There is provided a bearing assembly including: a sleeve supporting a shaft; a base cover coupled to the sleeve by press-fitting and closing a lower portion of the sleeve; and at least one deformation prevention part formed to be depressed from an outer peripheral surface of the base cover in an inner diameter direction and preventing deformation of the base cover when the base cover is press-fitted into the sleeve. | 05-09-2013 |
20130113316 | BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - There is provided a bearing assembly including: herringbone-shaped first and second fluid dynamic pressure parts formed in upper and lower portions of at least one of an outer peripheral surface of a shaft and an inner peripheral surface of a sleeve in an axial direction to be spaced apart from each other; and a first auxiliary fluid dynamic pressure part formed to be bent upwardly from an end portion of a lower groove of the herringbone-shaped first fluid dynamic pressure part in an axial direction. | 05-09-2013 |
20130119801 | BEARING ASSEMBLY AND FAN MOTOR INCLUDING THE SAME - There is provided a bearing assembly including: a sleeve supporting a rotation of a shaft via dynamic fluid pressure generated in oil interposed therebetween; a boss rotating together with the shaft; and a sealing part including an oil sealing part disposed above the sleeve to seal the oil between the oil sealing part and the shaft and a gap forming part extended upwardly in an axial direction from the oil sealing part to form a gap preventing a leakage of the oil between the gap forming part and the boss. | 05-16-2013 |
20130119802 | AIR GAP CONTROL SYSTEMS AND METHODS - In one embodiment, an apparatus includes a first member that supports a magnetic flux carrying member and a second member that supports a magnetic flux generating member disposed for movement relative to the first member. An air gap control system is coupled to at least one of the first member or the second member and includes an air gap control device that is separate from a primary magnetic flux circuit formed between the first member and the second member. The air gap control device is configured to exert a force on one of the first and second members in response to movement of the other of the first and second members in a direction that reduces a distance between the first and second members to maintain a minimum distance between the first and second members and/or substantially center the one of the first and second members within the other. | 05-16-2013 |
20130127273 | HYDRODYNAMIC BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - There are provided a hydrodynamic bearing assembly and a motor including the same. The hydrodynamic bearing assembly includes: a sleeve having a shaft hole into which a shaft is rotatably inserted; and a hub fixed to an upper end of the shaft and extended in an outer radial direction, wherein an upper surface of the sleeve and a lower surface of the hub have an oil interface formed therebetween to seal oil. | 05-23-2013 |
20130127274 | SPINDLE MOTOR - There is provided a spindle motor including: a hub operating together with a shaft and including a magnet; a base coupled to a sleeve supporting the shaft and including a core having a coil wound therearound, the coil generating rotational driving force; and a shielding part provided on the magnet and blocking magnetic flux introduced from the magnet into the base to thereby increase magnetic flux density between the magnet and the core, wherein the shaft and the hub rotate while descending via oil when power is applied to the coil. | 05-23-2013 |
20130127275 | ELECTRIC MOTOR ASSEMBLY - An axial flux electric motor is disclosed. The motor includes a rotor having a first rotor face, a second rotor face, a primary bearing locator on the first rotor face and one or more permanent magnets mounted to the first rotor face. Also included is a stator having a first stator face, a second stator face, a secondary bearing locator on the first stator face, a stator winding having one or more conductors and a connector for connection of the stator winding to a power source. A bearing assembly is also provided and positioned between the first face of the rotor and the first face of the stator for rotationally supporting movement of the rotor relative to the stator, the bearing assembly axially displacing the rotor from the stator to provide an air gap therebetween. The bearing assembly is engaged by the primary and secondary bearing locators to correctly position the bearing assembly. | 05-23-2013 |
20130127276 | HYDRODYNAMIC BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - There are provided a hydrodynamic bearing assembly and a motor including the same. The hydrodynamic bearing assembly includes: a sleeve having a shaft rotatably inserted therein; a hub provided on an upper end of the shaft and having a main wall part protruding downwarly in an axial direction; and a stopper provided at an inner side of the main wall part to limit floatation of the hub and form an oil interface between an inner surface thereof in an inner radial direction and an outer surface of the sleeve, wherein the stopper has a lower porosity in a portion filled with oil than that of other portions thereof. | 05-23-2013 |
20130127277 | FLAT MOTOR - A flat motor has a standard cylindrical bearing and the structure for fastening the bearing by sufficient strength. The flat motor has a rotor frame that is rotatably supported by a bearing through which the shaft passes, and a rotor frame has: flat portion which is formed by a flat plate and which has central hole; outer cylindrical portion which is formed in a cylindrical shape on the side of central hole of flat portion by bending the flat plate and lengthening in an axial direction of the shaft; and inner cylindrical portion to which bearing is fastened, and which is formed in a cylindrical shape on the inner circumstance side of outer cylindrical portion by bending the flat plate at the end opposite to the end of flat portion on the inside of rotor frame and lengthening in a direction contrary to the direction in which outer cylindrical portion lengthens. Since inner cylindrical portion is formed by bending the flat plate at the end of outer cylindrical portion on the inside of rotor frame, and lengthening in a direction contrary to the direction in which outer cylindrical portion lengthens, in inner cylindrical portion the force is generated, as reaction force generated based on mainly bending, toward the inside of rotor frame with a focus on the end opposite to the end of outer cylindrical portion, and cylindrical bearing is elastically fastened by the force generated toward the inside. | 05-23-2013 |
20130134812 | SPINDLE MOTOR AND METHOD OF MANUFACTURING THE SAME - There is provided a spindle motor including: a shaft connected directly or indirectly to a base member and having a depression groove formed in a central portion of an outer peripheral surface thereof; a sleeve rotatably installed on the shaft and having a communication hole formed so as to be connected to the depression groove; and a rotor hub fixedly installed on the sleeve to thereby rotate together therewith, wherein the communication hole is inclined so that lubricating fluid may be easily injected into the depression groove, and the sleeve has a fluid storage part formed on an outer peripheral surface thereof, the fluid storage part being connected to the communication hole and temporarily storing the lubricating fluid therein. | 05-30-2013 |
20130134813 | SPINDLE MOTOR - There is provided a spindle motor including: a sleeve rotatably supporting a shaft; a thrust plate fixedly installed on the shaft to be disposed above the sleeve; a cap member fixedly installed on the sleeve and forming a liquid-vapor interface between a lubricating fluid and surrounding air together with the thrust plate; and a buffering member installed on a lower surface of the cap member. | 05-30-2013 |
20130140931 | SPINDLE MOTOR - There is provided a spindle motor including: a base part including a base member and a lower thrust member fixedly installed on the base member; a shaft having a lower end portion fixedly installed on the base part; an upper thrust member fixedly installed on an upper end portion of the shaft; a sleeve disposed between the upper and lower thrust members and rotatably installed on the shaft; and a rotor hub fixedly installed on the sleeve to thereby rotate together therewith, wherein the sleeve includes a connection hole formed therein in order to connect an inner diameter portion thereof to an outer peripheral surface thereof. | 06-06-2013 |
20130147294 | SPINDLE MOTOR - The present invention has been made in an effort to provide a spindle motor using a fluid dynamic pressure bearing, in which sealing of a sealing part including an operating fluid interface may be more effectively performed at the time of operation or non-operation of the spindle motor. | 06-13-2013 |
20130147295 | BEARING DEVICE AND ELECTRIC MOTOR HAVING THE SAME - A radial bearing is received in and is fixed to a bearing receiving portion of a yoke housing, which includes large and small diameter parts, to rotatably support a rotatable shaft. A thrust ball and a thrust plate are received in the bearing receiving portion on an axial side of the radial bearing, which is opposite from the rotatable shaft. The large diameter part receives and holds the radial bearing. The small diameter part holds the thrust ball. The thrust plate is held by an axial end area of the small diameter part. | 06-13-2013 |
20130154416 | SPINDLE MOTOR - There is provided a spindle motor including: a lower thrust member fixedly installed on a base member and including an extension part extended upwardly in an axial direction; a shaft having a lower end portion fixedly installed on the lower thrust member; a sleeve rotatably installed with respect to the shaft; an upper thrust member fixedly installed on the shaft to correspond to an upper portion of the sleeve; and a rotor hub rotating together with the sleeve, wherein an end portion of the extension part and a surface of the sleeve opposed thereto are provided with rounded surfaces. | 06-20-2013 |
20130154417 | SPINDLE MOTOR - There is provided a spindle motor, including: a shaft directly or indirectly fixed to a base; a rotor hub rotatably disposed via oil while maintaining a bearing gap from the shaft and including a communicating part in communication with the outside so that a fluid-air interface is formed between the rotor hub and the shaft; and a compensating part formed by allowing a predetermined area of the rotor hub to be depressed so as to compensate for mass unbalance of the rotor hub due to the communicating part. | 06-20-2013 |
20130154418 | SPINDLE MOTOR - There is provided a spindle motor, including: a hub rotated together with a shaft; a sleeve supporting rotation of the shaft via oil; and a stopper mounted on the hub to prevent the hub from overfloating with respect to the sleeve, wherein one of opposing surfaces of the stopper and the hub is provided with at least one press-fitting groove for press-fitting the stopper in the hub, and the other of the opposing surfaces of the stopper and the hub is provided with at least one press-fitting protrusion press-fitted to the press-fitting groove. | 06-20-2013 |
20130154419 | SLIDING MEMBER AND FLUID DYNAMIC PRESSURE BEARING APPARATUS - There is provided a sliding member including: a substrate; and a protective film provided on the substrate, wherein the protective film is composed only of a metal base layer provided on the substrate, a low-hardness diamond-like carbon layer provided as a single layer on the metal base layer, and a high-hardness diamond-like carbon layer provided as a single layer directly on the low-hardness diamond-like carbon layer. The sliding member has the protective film which has excellent frictional wear resistance property and satisfactory adhesion property to the substrate, regardless of having a simple structure. | 06-20-2013 |
20130154420 | SPINDLE MOTOR - There is provided a spindle motor, including: a hub rotating together with a shaft; a sleeve supporting rotation of the shaft via oil; and a pumping part formed in at least one of the sleeve and the hub to pump the oil leaked outside of an interface of the oil in a normal state in a direction toward the interface of the oil in the normal state, wherein a portion of the pumping part may contact the oil in the normal state and the remainder of the pumping part does not contact the oil in the normal state. | 06-20-2013 |
20130154421 | SPINDLE MOTOR - Disclosed herein is a spindle motor in which a corresponding surface of a cover member that an operating fluid circulated from a radial bearing part of the spindle motor contacts is formed to be tapered. A taper part is formed on the corresponding surface of the cover member that the operating fluid forming a fluid dynamic pressure bearing is circulated to contact to improve durability of the cover member and increase a circulation speed of the operating fluid, thereby making it possible to improve current characteristics. | 06-20-2013 |
20130162078 | SPINDLE MOTOR - Disclosed herein is a coupling structure for coupling a stopper supporting a hub and a sleeve of a spindle motor to a protrusion part of the hub. Particularly, coupling force between the stopper and the protrusion part of the hub is improved, thereby making it possible to improve reliability in coupling between the hub and the sleeve. In addition, it is possible to maintain coupling reliability of an assembly of the hub and the sleeve against vibration generated at the time of driving of the motor, external impact, or the like. | 06-27-2013 |
20130162079 | SPINDLE MOTOR - Disclosed herein is a spindle motor. In the spindle motor according to the present invention, a thrust part is disposed at a lower portion of a shaft, and a support part surface-contacting a lower end of the shaft is formed at the thrust part so as to have a round shape, thereby making it possible to easily prevent a wobble phenomenon of a rotor due to a gap in a shaft system. In addition, a guide part is formed to be protruded at the thrust part to lock the shaft including a narrow part formed therein, thereby making it possible to easily prevent floating of the rotor. | 06-27-2013 |
20130162080 | HYDRODYNAMIC BEARING ASSEMBLY AND SPINDLE MOTOR INCLUDING THE SAME - There are provided a hydrodynamic bearing assembly and a motor including the same. The hydrodynamic bearing assembly includes: a sleeve supporting a shaft and forming a bearing clearance filled with a lubricating fluid; a housing enclosing an outer peripheral surface of the sleeve and including a flange part formed in an upper end portion thereof and extended outwardly; a rotor hub coupled to an upper end portion of the shaft and including an extension wall part extended to be disposed outwardly of the housing; a stopper member fixed to the extension wall part while being disposed under the flange part of the housing, and forming, together with an outer peripheral surface of the housing, a space in which a liquid-vapor interface is formed; and a cover member coupled to a lower end portion of the housing. The sleeve and the housing include first and second circulation holes formed therebetween. | 06-27-2013 |
20130162081 | HYDRODYNAMIC BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - There are provided a hydrodynamic bearing assembly and a motor including the same. The hydrodynamic bearing assembly includes: a fixed member; a rotating member forming, together with the fixed member, a bearing clearance filled with a lubricating fluid and rotating relatively with respect to the fixed member; upper and lower radial dynamic pressure grooves formed in at least one of the fixed member and the rotating member forming the bearing clearance therebetween while facing each other in order to generate hydrodynamic pressure at the time of rotation of the rotating member; and an auxiliary groove formed in at least one of the fixed member and the rotating member between the upper and lower radial dynamic pressure grooves in order to pump the lubricating fluid upwardly or downwardly. | 06-27-2013 |
20130162082 | SPINDLE MOTOR - There is provided a spindle motor including: a sleeve forming a dynamic pressure generation space with a shaft; a hub including a main wall portion surrounding a circumference of the sleeve; and a cover disposed between the sleeve and the hub, wherein the sleeve and the cover have a storage unit formed therebetween, the storage unit storing a lubricating fluid. | 06-27-2013 |
20130162083 | SPINDLE MOTOR - Disclosed herein is a spindle motor including a shaft forming a rotation center of the motor; a sleeve receiving the shaft therein and rotatably supporting the shaft; a thrust plate coupled to the sleeve in a direction vertical to an axial direction, wherein the thrust plate includes a friction reducing coating layer formed thereon. According to the present invention, the coating layer for reducing friction force is formed on the thrust plate of the spindle motor, such that friction force generated when the spindle motor is repeatedly and sequentially stopped, operated, and stopped may be effectively reduced, such that operational performance of the spindle motor may be improved. | 06-27-2013 |
20130162084 | SPINDLE MOTOR - Disclosed herein is a spindle motor including: a shaft; a sleeve having a hollow cylindrical shape so as to rotatably support the shaft; and a base including a cylindrical support part and having the sleeve inserted into and fixed to a hollow part formed at the center of the support part, wherein the sleeve includes a sleeve upper end portion and a sleeve lower portion. The sleeve includes the sleeve upper end portion and the sleeve lower end portion that are arranged to face each other and includes a thrust plate disposed between the sleeve upper end portion and the sleeve lower end portion. | 06-27-2013 |
20130169091 | HYDRODYNAMIC BEARING MODULE AND SPINDLE MOTOR HAVING THE SAME - Disclosed herein is a hydrodynamic bearing module including: a shaft having a flange part formed at a lower portion thereof; a sleeve rotatably supporting the shaft; a cover coupled to a lower end portion of the sleeve and supporting the shaft; a radial bearing formed between the shaft and the sleeve in a radial direction of the shaft; and an upper thrust bearing formed between the flange part and the sleeve and a lower thrust bearing formed between the flange part and the cover, in an axial direction of the shaft. | 07-04-2013 |
20130169092 | BEARING HOLDER - A bearing holder for fixing a bearing to a support structure such as a casing of a gearbox uses a single plate-like body. The body has a through hole, a plurality of hooks extending from a first side of the body and defining a first axial step limiting the axial movement of the bearing through the hole, and a plurality of projections extending from a second side of the body and arranged to be radially deformed to define a second axial step limiting the axial movement of the bearing through the hole in a second axial direction. Centering lips extending inwardly from the edge of the hole may be provided to fix the lateral position of the bearing. | 07-04-2013 |
20130169093 | ASSEMBLY FOR LUBRICATING A BEARING - The invention regards an assembly ( | 07-04-2013 |
20130181557 | FLUID INJECTING METHOD AND APPARATUS FOR IMPLEMENTING THE SAME, AND MOTOR MANUFACTURED USING THE SAME - There are provided a fluid injecting method capable of easily injecting oil into a motor and an apparatus for implementing the same, and a motor manufactured using the same. The fluid injecting method includes: connecting a shaft and a sleeve to each other to thereby assemble a bearing assembly; disposing at least one bearing assembly under a dispenser in a state in which the bearing assembly is tilted at a predetermined angle; and injecting a fluid into the bearing assembly. | 07-18-2013 |
20130181558 | ROTATING DEVICE - A rotating device comprises a stator configured to rotatably support a rotor via a lubricant. A first zonal region is formed on an inner surface of a sleeve. A plurality of grooves along a direction that crosses the first zonal region are formed on the first zonal region from each of both sides of the first zonal region. A groove formed from one side of the first zonal region is formed so that the closer a position in the groove is to the other side of the first zonal region, the shallower and the narrower the groove at the position will be. A groove formed from the other side is formed so that the closer a position in the groove is to the one side, the shallower and the narrower the groove at the position will be. | 07-18-2013 |
20130181559 | ROTARY ELECTRIC MACHINE, BEARING ATTACHING AND DETACHING JIG, AND BEARING REPLACEMENT METHOD - To provide a rotary electric machine including a stator iron core, a rotor including a lamination core that is arranged within the stator iron core and is constituted by laminating electromagnetic steel plates and iron core holders that cover both ends of the lamination core, a frame including a cylindrical portion that encloses the stator iron core and the rotor and a rotor-shaft supporting unit that extends in the direction of a rotor shaft and supports the rotor shaft, and cartridges that are detachably attached to the rotor-shaft supporting unit and rotatably support the rotor shaft, in which on the iron core holder and the iron core holder, recessed portions are circumferentially provided, into which end portions of jigs that are inserted through the rotor-shaft supporting unit to enable the cartridges to be detached and attached are fitted. | 07-18-2013 |
20130187498 | MOTOR - A motor includes a bearing holder having a substantially cylindrical shape and a surrounding member fixed to a radial outer surface of the bearing holder. The bearing holder includes a plurality of holder protrusion portions each including a radial outer surface at least partially making contact with the surrounding member and a plurality of holder recess portions positioned radially inward of the plurality of holder protrusion portions. The plurality of holder protrusion portions and the plurality of holder recess portions are alternately arranged along a circumferential direction. A central angle of a portion of an inner circumferential surface of the surrounding member remaining out of contact with each of the plurality of holder protrusion portions is equal to or larger than a central angle of a portion of an outer circumferential surface of a bearing unit. | 07-25-2013 |
20130187499 | MOTOR - A motor includes a bearing holder and an attachment plate fixed to a radial outer surface of the bearing holder. The attachment plate includes a flat portion including a circular hole and a burring portion axially protruding from the circular hole. The bearing holder includes holder protrusion portions each including a radial outer surface at least partially making contact with the burring portion and holder recess portions and the holder protrusion portions and the holder recess portions are alternately arranged along a circumferential direction. The burring portion includes a plurality of caulking sections extending radially outward to make contact with the circuit board and the plurality of caulking sections are arranged radially outward of the holder recess portions. | 07-25-2013 |
20130193790 | GENERATOR BALL BEARING SUPPORT - A bearing support plate for use in a generator has a radially enlarged flange with a first cylindrical portion extending from the flange in one direction which will provide a bearing support for an outer race of a ball bearing, and a radially inner cylindrical portion extending in an opposed direction that will be away from the ball bearing relative to the flange. The flange is generally cylindrical but has a truncated portion over a circumferential extent. The first cylindrical portion is formed with radially enlarged portions with intermediate radially thinner portions. The flange includes bolt holes circumferentially aligned with the radially thinner portions. | 08-01-2013 |
20130193791 | BEARING ASSEMBLY AND SPINDLE MOTOR INCLUDING THE SAME - There is provided a bearing assembly including: a sleeve supporting a shaft via oil; a sleeve supporting a shaft via oil; a sleeve housing surrounding the sleeve to prevent leakage of the oil; and at least one circulation part formed such that upper and lower surfaces of at least one of the sleeve and the sleeve housing are in communication with each other, wherein at least one of an outer peripheral surface of the sleeve and an inner peripheral surface of the sleeve housing has a maximum radius of curvature at a portion adjacent to the circulation part. | 08-01-2013 |
20130193792 | SPINDLE MOTOR - There is provided a spindle motor capable of reducing generation of negative pressure. The spindle motor includes: a sleeve fixedly installed on a base member; a shaft rotatably supported by the sleeve; a rotor hub fixedly installed on an upper end portion of the shaft to rotate together therewith; and a thrust plate fixedly coupled to the sleeve so as to be disposed to face a lower surface of the rotor hub and having a ring shape, wherein the thrust plate includes a channel part formed therein in order to reduce a difference in pressure between a bearing clearance on an inner side thereof and a bearing clearance on an outer side thereof. | 08-01-2013 |
20130200738 | Motor with Oil Storage Function - The invention discloses a motor with oil storage funciton. The motor includes a base, a bearing, a stator unit and a rotor. The base includes a shaft tube portion having a closed end and an open end. The bearing is received in the shaft tube portion of the base. The stator unit is fixed to the base and has an insulation unit. The insulation unit has a blocking portion extending towards the open end of the shaft tube portion. The rotor includes a hub having a shaft and a permanent magnet. The shaft is rotatably coupled with the bearing, and an air gap is formed between the permanent magnet and the stator unit. The blocking portion of the insulation unit, the shaft tube portion and the bearing jointly form an enlarged oil chamber at the open end of the shaft tube portion. | 08-08-2013 |
20130214628 | WIND TURBINE GENERATORS - A wind turbine generator has a drive end at which one or more turbine blades are mountable and a non-drive end. The wind turbine generator comprises an external stator having a radially inner surface and an internal rotor having a radially outer surface, an air gap being defined between the rotor and the stator. A main bearing arrangement is provided at the drive end and acts between the rotor and the stator to mount the rotor for rotation about the stator and a stabiliser beating is provided at the non-drive end and acts between the rotor and the stator to stabilise the rotor and stator and maintain and control the air gap therebetween. | 08-22-2013 |
20130214629 | FLUID DYNAMIC BEARING MOTOR INCLUDING PLASTIC COMPONENT - Provided herein is a motor including a plastic component; a stationary component having a thrustplate; and a rotatable component having a sleeve and a counterplate, wherein the plastic component is positioned outside the sleeve, and wherein the thrustplate and the counterplate are positioned to form a fluid dynamic bearing (“FDB”) at a top portion of the sleeve. Also provided is a motor comprising a plastic component; a stationary component comprising a thrustplate; and a rotatable component comprising a sleeve; wherein the plastic component is affixed to the sleeve, and wherein the thrustplate and the plastic component are positioned to form a FDB. Also provided is a motor comprising a plastic component; a stationary component comprising an inner component; and a rotatable component comprising the plastic component and a supporting means for supporting the inner component, wherein the inner component and the supporting means are positioned to form a FDB. | 08-22-2013 |
20130221782 | BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - There are provided a bearing assembly and a motor including the same capable of securing shaft system reliability while maintaining motor slimness. The bearing assembly includes a sleeve supporting a shaft via oil; and a sleeve holder having the sleeve inserted thereinto and fixedly supporting the sleeve, wherein an upper end of the sleeve is protruded from the sleeve holder to be higher than an upper end of the sleeve holder in an upward axial direction. | 08-29-2013 |
20130221783 | OUTER ROTOR-TYPE BRUSHLESS MOTOR - The outer rotor-type blushless motor comprises: a stator including a cylindrical housing, a stator core having stator pole teeth and a bearing coaxially incorporated in a cylindrical hole of the hosing; and a rotor including a rotor yoke, a rotor hub provided to the rotor yoke and a rotor shaft rotatably supported by the bearing. A first resin washer, through which the rotor shaft is pierced and which contacts an end face of the rotor hub, and a second resin washer, which contacts an end face of the bearing incorporated in a center hole of the stator core, contact each other. The second resin washer has an elastic projected section fitted in a concave section formed in the center hole of the stator core. | 08-29-2013 |
20130221784 | Permanent Magnet Rotating Electric Machine - A permanent magnet rotating electric machine includes a rotor and a stator. The rotor includes: a permanent magnet forming a single pole within a rotor core of the rotor, the permanent magnet being divided into two across a magnetic pole center and arranged such that the magnetic pole center and a magnetization direction of the permanent magnet extend in parallel with each other; a connecting portion assuming an electrical steel sheet disposed between the two divided permanent magnets; and magnet insertion holes in which the permanent magnets are inserted. In the rotor, the magnet insertion hole is shaped to include: air gaps at both end portions in a width direction of the permanent magnet, each air gap being formed between a surface of the permanent magnet extending perpendicularly to the magnetization direction and a surface of the electrical steel sheet facing the surface of the permanent magnet; a shoulder portion disposed on the facing surface, the shoulder portion having a length shorter than a thickness in the magnetization direction of the permanent magnet; and another air gap extending toward a rotor outside diameter side and the magnetic pole center side in a direction perpendicular to the shoulder portion on an outside of the shoulder portion. | 08-29-2013 |
20130221785 | IDLER GEAR AND JOURNAL BEARING ASSEMBLY FOR A GENERATOR - A journal bearing for a generator idler gear assembly which includes an impregnated carbon body that has an inner diameter and an outer diameter that provides a bearing thickness. The body includes a height, wherein outer diameter to inner diameter provides a first ratio of approximately 1.3-1.5 and the inner diameter to height provides a second ratio of approximately 1.5-1.9. | 08-29-2013 |
20130229076 | Miniature Motor and Bearing Arrangement - Electric miniature motor, comprises bearings; stationary assemblies having end faces; and metallic configurations for seating the bearings are formed at the end faces. At least one of the bearings is a roller bearing wherein the outer diameter of the roller bearing is smaller than the inner diameter of the corresponding configuration for seating the bearing; and the roller bearing is connected by at least one welded joint to the configuration. | 09-05-2013 |
20130229077 | Miniature Motor and Bearing Arrangement - Electric miniature motor comprises bearings; stationary assemblies having end faces; metallic configurations for seating the bearings are formed at the end faces of the stationary assemblies; and at least one of the bearings is a roller bearing wherein an inner ring of the roller bearing is connected by at least one welded joint to a shaft of the motor. | 09-05-2013 |
20130234551 | HYDRODYNAMIC BEARING ASSEMBLY AND SPINDLE MOTOR INCLUDING THE SAME - There are provided a hydrodynamic bearing assembly and a spindle motor including the same. The hydrodynamic bearing assembly includes: a sleeve supporting a shaft and forming a bearing clearance between the sleeve and the shaft, the bearing clearance filled with a lubricating fluid; a housing partially enclosing an outer peripheral surface of the sleeve; a rotor hub coupled to the upper end portion of the shaft and including an extension wall part partially facing an upper end portion of the sleeve and partially extended to be disposed outwardly of the housing; a stopper provided on a lower end portion of the shaft to be protruded outwardly in a radial direction to be caught by a lower end portion of the sleeve; and a circulation hole provided between the sleeve and the housing to allow a lower portion of the sleeve to communicate with an upper end portion of the housing. | 09-12-2013 |
20130234552 | ROTATING DEVICE - A rotating device includes a base having a peripheral wall with a fastened top cover, an axial body with one end fixed to the base and another end joined with the top cover, a freely rotatable bearing body with the axial body thereinside, a radial dynamic pressure generating groove in either one of surfaces of the axial body, the axial and bearing bodies facing each other in a radial direction, a lubricating medium in a space between the axial and bearing bodies, a radially outward extending lower flange on the one-end side face of the axial body, and a radially outward extending upper flange on the another-end side face of the axial body, a bearing unit in a space between the upper and lower flanges in an axial direction, a lower rod fastened to the lower flange, and an upper rod encircling the lower rod fastened to the upper flange. | 09-12-2013 |
20130241332 | ROTATING MEMBER ASSEMBLY AND SPINDLE MOTOR INCLUDING THE SAME - There are provided a rotating member assembly and a spindle motor including the same. The rotating member assembly includes: a shaft including an outer surface step part provided in an outer surface thereof; and a rotor hub including an insertion hole into which the shaft is inserted, the insertion hole including an inner surface step part provided in an inner surface thereof and corresponding to the outer surface step part, such that the inner surface step part and the outer surface step part are fittingly-coupled to each other. | 09-19-2013 |
20130249337 | HYDRODYNAMIC BEARING MODULE AND SPINDLE MOTOR HAVING THE SAME - Disclosed herein is a hydrodynamic bearing module, including: a shaft; a sleeve having the shaft rotatably and insertedly coupled thereinto and forming a micro-interval together with the shaft; oil injected in order to form a hydrodynamic bearing part between the shaft and the sleeve; a cover coupled to a lower end portion of the sleeve and sealing the oil; and a protrusion member positioned between the shaft and the cover in an axial direction of the shaft and selectively mounted on the cover or the shaft. | 09-26-2013 |
20130257203 | SPINDLE MOTOR - There is provided a spindle motor including: a shaft; a first sleeve rotatably supporting the shaft by fluid dynamic pressure; a second sleeve provided outwardly of the first sleeve; a stator core mounted on an outer surface of the second sleeve; and a base member including a mounting part protruding upwardly in an axial direction and fixed to at least one of the first and second sleeves. | 10-03-2013 |
20130257204 | MOTOR - A motor may include a rotor having a rotation shaft, a stator formed in a tube shape and disposed around the rotor, a bearing member rotatably supporting the rotor, and an end plate with a spring part urging the rotation shaft in the motor axial line direction and holding the bearing member between the stator and the end plate. The bearing member may include a plate-shaped part whose outer shape dimension is smaller than an inner shape dimension of the stator and at least a part of the plate-shaped part is located on an inner side of the stator and an engagement part protruded from the plate-shaped part to an outer side in a radial direction and is overlapped with an end face of the stator. The end plate may be overlapped with the plate-shaped part on an opposite side to the stator. | 10-03-2013 |
20130257205 | ECCENTRIC CIRCLING DRIVE DEVICE - [Object] To provide an eccentric circling drive device that is capable of performing appropriate lubrication and cooling by means of a processing liquid while preventing energy loss and damage to members due to friction. | 10-03-2013 |
20130270945 | AXIAL LOAD SHARING BEARING SYSTEM AND ASSOCIATED METHOD OF USE - An axial flux electric machine and associated method of use that includes a shaft, a rotor attached to the shaft, a plurality of permanent magnets positioned underneath the rotor, an electrical winding positioned below the plurality of permanent magnets, a stator that encircles the shaft that is located below the rotor, a first bearing assembly located below the stator and encircling the shaft of the rotor, a second bearing assembly located below the first bearing assembly and encircling the shaft, and a spring mechanism, located between the first bearing assembly and the second bearing assembly, to distribute load placed on the shaft between the first bearing assembly and the second bearing assembly. | 10-17-2013 |
20130278100 | POWER GENERATING APPARATUS - A wind power generator includes: an input rotor provided so as to be rotatable together with an output shaft of a speed increaser; an output rotor provided so as to be rotatable together with a drive shaft of a generator; and a one-way clutch arranged between the input and output rotors. The one-way clutch connects the input rotor to the output rotor such that the input rotor and the output rotor are rotatable together with each other when a rotation speed of the input rotor exceeds a rotation speed of the output rotor, and that disconnects the input rotor from the output rotor when the rotation speed of the input rotor falls below the rotation speed of the output rotor. The one-way clutch has a rotation speed limiter that disconnects the input rotor from the output rotor when the rotation speed of the output shaft exceeds a predetermined value. | 10-24-2013 |
20130285495 | Motor - A motor includes a base, a stator, and a rotor. The base includes a shaft tube having an open end and receiving an inner assembly. The stator is mounted to an outer periphery of the shaft tube. The rotor is rotatably coupled to the inner assembly. The stator includes an insulating bobbin unit having an extension extending in a radial direction to the open end of the shaft tube. The extension includes an engagement hole. The shaft tube includes a positioning member having an engaging section engaged in the engagement hole. The insulating bobbin unit is fixed by an end of the engaging section. The engagement stability of the stator is enhanced by engagement of the positioning member of the base and the insulating bobbin unit. | 10-31-2013 |
20130285496 | Miniature Motor and Bearing Arrangement - Electric miniature motor comprises bearings; stationary assemblies having end faces; and metallic configurations disposed at the end faces for seating the bearings. At least one of the bearings is a sleeve bearing of sintered material inserted into a massive ring of weldable material, the outer diameter of which is smaller than the inner diameter of the corresponding configuration for seating; and the ring is connected by at least one welded joint to the configuration for seating. | 10-31-2013 |
20130293048 | HYDRODYNAMIC BEARING APPARATUS AND SPINDLE MOTOR HAVING THE SAME - There is provided a hydrodynamic bearing apparatus, including: a shaft; and a sleeve rotatably supporting the shaft; wherein at least one of an outer circumferential surface of the shaft and an inner circumferential surface of the sleeve is provided with upper and lower dynamic pressure grooves having a herringbone-shaped pattern provided therein so as to generate fluid dynamic pressure at the time of rotation of the shaft, and at least one of the upper and lower dynamic pressure grooves is formed such that a width of a pattern portion disposed in an upper portion thereof is different from that of a pattern portion disposed in a lower portion thereof, based on a center line. | 11-07-2013 |
20130307361 | FAN MOTOR SILICON STEEL SHEET STRUCTURE AND FAN MOTOR THEREOF - A fan motor silicon steel sheet structure and a fan motor thereof. The silicon steel sheet structure includes a silicon steel sheet assembly having multiple silicon steel sheets, which overlap one another. The silicon steel sheets include at least one first silicon steel sheet and multiple second silicon steel sheets. The first silicon steel sheet has a first bore and at least one protrusion section. The protrusion section inward protrudes from an inner circumference of the first bore. The first silicon steel sheet is overlaid on one side of the second silicon steel sheets. Each of the second silicon steel sheets has a second bore in communication with the first bore. The fan motor silicon steel sheet structure is able to effectively secure the bearing and provide a dustproof effect. With such structure, the manufacturing cost of the fan motor is lowered. | 11-21-2013 |
20130313931 | BEARING LUBRICANT AND USE THEREOF - A bearing lubricant of the present invention contains a compound represented by the following general formula: | 11-28-2013 |
20130320793 | SPINDLE MOTOR - Disclosed herein is a spindle motor including: a shaft forming the center of rotation of the motor; a sleeve receiving the shaft therein and rotatably supporting the shaft; a thrust plate press-fitted into the shaft so as to be perpendicular to an axial direction of the shaft; and a sealing cap spaced apart from the thrust plate in an upward axial direction and bent to enclose an outer side surface of the sleeve to thereby be coupled to the thrust plate, wherein the sealing cap is provided with a sealing part having concave parts and convex parts alternately formed along an inner peripheral surface thereof in a radial direction. | 12-05-2013 |
20130320794 | ARRANGEMENT TO ENSURE AN AIR GAP IN AN ELECTRIC MACHINE - An arrangement to ensure an air gap in an electrical machine is provided. The electrical machine has a stator arrangement and a rotor arrangement, the rotor arrangement rotating around a longitudinal axis. An air gap is defined by a distance between parts of the rotor arrangement and parts of the stator arrangement, wherein the parts of the stator arrangement are opposite to the parts of the rotor arrangement along a certain length. The stator arrangement includes a lamination stack which is constructed to support a winding of a stator-coil, and the rotor arrangement includes a plurality of permanent magnets. A cross section of the air gap changes along the certain length such that the air gap is not uniform in view to the certain length. The cross section of the air gap is configured by a change in a shape of the lamination stack along the certain length. | 12-05-2013 |
20130342060 | SOLID-LUBRICATED BEARING ASSEMBLY - A solid-lubricated ball, roller, or plain bearing assembly with solid rings made of solid lubricant loosely fitted inside the bearing envelope for replenishing the solid-lubricant films on the bearing contacting surfaces for the life of the bearing without the need for any re-lubrication. A method is also provided for mounting all-ceramic bearing rings on metal shafts and housings for operation at extremely high temperatures and solid-lubricant idler gears to replenish lubricant films on gear teeth. Cages may be used at extremely high speeds or with very large ceramic balls or rollers and when used the cages require pocket clearances in the circumferential direction several times larger than in the axial direction. | 12-26-2013 |
20130342061 | SPINDLE MOTOR - There is provided a spindle motor including a lower thrust member fixed to a base member; a shaft having a lower end portion fixed to the lower thrust member; a rotating member rotating around the shaft; an upper thrust member fixed to an upper end portion of the shaft and forming a bearing clearance together with the rotating member; and a cover member fixed to the upper thrust member. | 12-26-2013 |
20130342062 | MOTOR FOR ROTATIONALLY SUPPORTING A HARD DISK - The present invention reduces contamination on a hard disk by adopting a new structural design for a motor. The motor of the present invention includes an adsorption plate portion in a magnetic space of the motor at a radially inward location relative to a disk placing portion on which hard disks are installed. The magnetic space of the motor is defined by a ceiling portion of a rotor hub and the adsorption plate portion. A liquid surface of lubricant of the fluid dynamic bearing mechanism is arranged radially inwardly relative to the adsorption plate portion, and a gap to which the liquid surface is exposed is connected to the magnetic space. The adsorption plate portion is preferably made of stainless steel. At least a portion of the surface of the adsorption plate portion is not covered with paint or other material so as to be utilized as an adsorption area. | 12-26-2013 |
20140001902 | ELECTRIC MOTOR ASSEMBLY | 01-02-2014 |
20140001903 | SECURING DEVICE FOR USE IN AN ELECTRIC MACHINE | 01-02-2014 |
20140001904 | FLUID DYNAMIC BEARING ASSEMBLY AND SPINDLE MOTOR HAVING THE SAME, AND METHOD OF ASSEMBLING SHAFT AND STOPPER | 01-02-2014 |
20140009019 | SPINDLE MOTOR - A spindle motor includes a base member formed of a magnetic material; a lower thrust member installed in the base member; a shaft fixedly installed on at least one of the lower thrust member and the base member; a sleeve rotatably supporting the shaft by fluid dynamic pressure and disposed above the lower thrust member to form a thrust dynamic pressure bearing together with the lower thrust member at the time of rotation thereof; a rotor hub coupled to the sleeve to rotate together therewith; and an upper thrust member fixedly installed on the shaft to be positioned above the sleeve and forming a thrust dynamic pressure bearing together with the sleeve at the time of rotation of the sleeve, wherein upward thrust dynamic pressure generated between the lower thrust member and the sleeve is greater than downward thrust dynamic pressure generated between the upper thrust member and the sleeve. | 01-09-2014 |
20140015360 | MOTOR STRUCTURE - Disclosed herein is a motor structure including a case provided with a predetermined inner space defined by coupling of a front housing and a rear housing, a rotor arranged within the case and provided with a circular yoke to which a plurality of magnets is mounted, a rotating shaft having a predetermined length and coupled to a center of the rotor, one end of the rotating shaft penetrating the front housing and the other end of the rotating shaft provided with a hole formed in a longitudinal direction of the rotating shaft, a stator spaced a distance apart from the rotor and provided with a coil wound therearound and surrounding the rotor, and a support arranged at the rear housing and inserted into the hole of the rotating shaft to support the rotating shaft to allow the rotating shaft to rotate. | 01-16-2014 |
20140028134 | ACTUATOR - An actuator includes: a coil; a permanent magnet rotor secured to and rotatably supported by an output shaft inside the coil; a bobbin made of a non-magnetic material and around which the coil is wound; a first stator inserted into and secured to the bobbin in one direction, and including an inner magnetic pole portion and an outer magnetic pole portion extending inside and outside the coil in an axial direction of the rotor, respectively; and a second stator inserted into and secured to the bobbin in a direction opposite to the one direction, and including an inner magnetic pole portion and an outer magnetic pole portion extending inside and outside the coil in the axial direction of the rotor, respectively. | 01-30-2014 |
20140035409 | BALL BEARING PARTICULARLY FOR USE IN HIGH SPEED GENERATOR - A ball bearing has an outer race and an inner race A plurality of ball members are supported radially between the inner and outer races. A pair of bearing cage halves are placed at axial ends of the balls. The bearing cage halves are formed of a first relatively hard material, and have a plating of a softer material on some surfaces The bearing cage halves have pockets facing the balls and with the soft plating The bearing cage halves are riveted together along a contact surface, not including the soft plating. The rivets extend through an aperture in each of the bearing cage halves, not provided with the soft plating. The rivets have heads extending into a ditch, not provided with the soft plating. A rotor sub-assembly, a generator, and a method of maintaining a generator are also disclosed. | 02-06-2014 |
20140035410 | ROTATING DEVICE - A rotating device is a device in which a sleeve of a rotor surrounds a shaft of a fixed body, a lubricant intervening between the shaft and the sleeve. A gap between the shaft and the sleeve includes two dynamic pressure generation portions spaced apart from each other in an axial direction. The rotor and the fixed body are arranged such that a center of gravity of the rotor having a plurality of magnetic recording disks mounted thereon is positioned between the two dynamic pressure generation portions. | 02-06-2014 |
20140042847 | SPINDLE MOTOR - A spindle motor includes a sleeve fixed to a base member, a shaft rotatably inserted into a shaft hole of the sleeve, and a rotor hub fixed to an upper end of the shaft. A protrusion having a corresponding inclined surface that defines a bearing clearance together with an outer circumferential surface of the sleeve is disposed on an inner diameter part of the rotor hub. | 02-13-2014 |
20140042848 | BRUSHLESS MOTOR - A brushless motor is provided including: a rotor housing including a circular-cylinder-shaped bearing housing portion and an outer cylinder portion; a rotor magnet provided at an inner peripheral face of the outer cylinder portion; a bearing housed in the bearing housing portion and assembled to a motor shaft; a stator core including a ring-shaped core main body provided in the radial direction between the bearing housing portion and the rotor magnet and a ring-shaped wall portion formed in a ring-shape along an inner peripheral portion of the core main body, extending from the core main body inner peripheral portion towards the radial direction inside, and facing one opening of the bearing housing portion; and a center piece including a main body portion facing one opening of the outer cylinder portion, and a close contact portion closely contacting in the stator core axial direction with the ring-shaped wall portion. | 02-13-2014 |
20140054994 | HYDRODYNAMIC BEARING MODULE AND SPINDLE MOTOR HAVING THE SAME - Disclosed herein is a hydrodynamic bearing module including: a hydrodynamic bearing part formed by filling oil in a micro-clearance between a rotating part and a fixed part including a sleeve; a first radial dynamic pressure bearing part formed in a micro-clearance between an inner diameter portion of the sleeve and the rotating part; a second radial dynamic pressure bearing part formed in a micro-clearance between an outer diameter portion of the sleeve and the rotating part; and a thrust dynamic pressure bearing part formed between the sleeve and the rotating part and positioned between the first and second radial dynamic pressure bearing parts. | 02-27-2014 |
20140054995 | FLUID DYNAMIC BEARING ASSEMBLY AND MOTOR HAVING THE SAME - The fluid dynamic bearing assembly of including: a sleeve formed to have a hollow into which a shaft is inserted; a sleeve housing formed to insert the sleeve therein; a bypass passage formed to axially communicate the upper portion and the lower portion of the sleeve between the sleeve and the sleeve housing and dispersing pressure of a lubricating fluid in the hollow; an oil sealing cap having an oil passage communicated with the bypass passage and taper-sealing the lubricating fluid within the oil passage; and a thrust plate formed to have a hole corresponding to a shape of the outer peripheral surface of the shaft and axially disposed under the sleeve. | 02-27-2014 |
20140070648 | THRUST WASHER FOR AN ELECTRIC MACHINE - The invention relates to a thrust washer ( | 03-13-2014 |
20140077643 | SPINDLE MOTOR - There is provided a spindle motor including: a shaft having a lower end portion fixed to one of a base member and a lower thrust member and provided with an installation groove depressed downwardly from an upper surface thereof; an upper thrust member including an insertion part inserted into and fixed to the installation groove of the shaft; and a rotating part forming a bearing clearance together with the upper and lower thrust members and the shaft and rotating around the shaft. | 03-20-2014 |
20140077644 | AC GENERATOR FOR VEHICLES - An AC generator for vehicles includes a rotor, a stator, a frame, a bearing retaining portion, and a resin-made cylindrical member. The bearing retaining portion is disposed in the frame, and retains a bearing that rotatably supports the rotor. The resin-made cylindrical member is disposed between the bearing and the bearing retaining portion, and an inner circumferential surface thereof has a simple cylindrical shape while an outer circumferential surface thereof has a thick portion in a part thereof. | 03-20-2014 |
20140084724 | HYDRODYNAMIC BEARING ASSEMBLY AND SPINDLE MOTOR INCLUDING THE SAME - There are provided a hydrodynamic bearing assembly and a spindle motor including the same, the hydrodynamic bearing assembly including a sleeve having a shaft inserted therein, a rotor coupled to an upper portion of the shaft in an axial direction to rotate together with the shaft, and a stopper plate including a horizontal portion coupled to an upper surface of the sleeve in the axial direction and a vertical portion extending downwardly in the axial direction from an outer surface of the horizontal portion to be fixed to an outer surface of the sleeve in an outer diameter direction, and preventing the shaft from floating at a time of rotation of the shaft. | 03-27-2014 |
20140091660 | MOTOR - There is provided a motor including: a sleeve rotatably supporting a shaft via a lubricating fluid; a base plate having the sleeve fixed thereto; a stator coupled to the base plate and including a core having a coil wound therearound in order to generate rotational driving force; and a rotor fixed to the shaft to be rotatable with respect to the stator and including a magnet facing the core, wherein the base plate includes a fixing part having the sleeve fixed thereto, an extension part extended from one end of the fixing part in an outer diameter direction, a seating part extended from one end of the extension part upwardly and downwardly in an axial direction, and a body part extended from the seating part in the outer diameter direction. | 04-03-2014 |
20140097717 | FLUID DYNAMIC PRESSURE BEARING APPARATUS AND SPINDLE MOTOR - There is provided a fluid dynamic pressure bearing apparatus including a shaft, a bearing sleeve rotatably supporting the shaft, and a lubricating oil filled between the shaft and the bearing sleeve, wherein at least one of the shaft and the bearing sleeve is formed of a copper alloy containing 0.8 wt % to 5 wt % of lead, and a base oil of the lubricating is a member selected from the group consisting of monoester, dibasic acid diester, diol ester and mixtures thereof, and the lubricating oil contains 0.1 wt % to 1 wt % of condensed phosphate ester. The fluid dynamic pressure bearing apparatus is capable of suppressing the hydrolysis of the lubricating oil, and the wear of the shaft and the bearing sleeve. | 04-10-2014 |
20140103764 | ELECTRIC MACHINE HAVING AN AXIAL SPRING ELEMENT - The invention relates to an axial spring element ( | 04-17-2014 |
20140111046 | INSULATED BEARING RING - An insulated bearing, a dynamoelectric machine including the insulated bearing, and a method of forming the insulated bearing are disclosed. In an embodiment, the bearing includes an outer ring, an inner ring disposed within the outer ring and concentric therewith. An insulating ring is disposed between the inner ring and the outer ring, and includes an outer circumferential serration extending radially outward from an outer surface of the insulating ring, and an inner circumferential serration extending radially inward from an inner surface of the insulating ring. These serrations mate with features of respective surfaces of the outer and inner rings. | 04-24-2014 |
20140117800 | LASER-WELDED JOINT STRUCTURE BETWEEN INSULATION FRAME AND BEARING CUP OF FAN AND METHOD OF FORMING SAME - A laser-welded joint structure between insulation frame and bearing cup of fan includes a base having a bearing cup and a stator having at least one insulation frame. The insulation frame includes a sleeve portion defining a bore axially extending therethrough. The sleeve portion is provided on an inner wall surface with at least one pressing section that radially projects into the bore to press a lower side against an upper end of the bearing cup and a bearing received therein. A portion of at least one lateral side of each pressing section that is in contact with the upper end of the bearing cup is melted by laser beam to form a laser-welded joint, so that the insulation frame and the bearing cup are integrally connected together at reduced manufacturing cost and have increased structural strength. A method of forming the laser-welded joint structure is also disclosed. | 05-01-2014 |
20140125175 | SPINDLE MOTOR AND HARD DISK DRIVE INCLUDING THE SAME - There are provided a spindle motor and a hard disk drive including the same, the spindle motor includes: a shaft fixedly installed on a base member and including an upper thrust member provided in an upper portion thereof and protruded outwardly in a radial direction, a sleeve supported by fluid dynamic pressure so as to be rotatable with respect to the shaft, a hub extended from the sleeve outwardly in the radial direction, and a sealing cap mounted on the hub and extended to an upper portion of the upper thrust member so as to cover a space between the upper thrust member and the hub formed in the axial direction. | 05-08-2014 |
20140145533 | SEALING MODULE OF HYDRODYNAMIC BEARING AND SPINDLE MOTOR HAVING THE SAME - Disclosed herein is a sealing module of a hydrodynamic bearing in which oil is filled in a micro gap between a shaft and a sleeve to form a hydrodynamic bearing part, wherein the shaft is fixedly coupled to a holder, the sleeve is rotatably supported by the shaft, the sleeve and the holder include bent parts formed at facing surfaces thereof in a direction perpendicular to an axial direction of the shaft respectively, and a maze type sealing part is formed by the bent parts. | 05-29-2014 |
20140152133 | SPINDLE MOTOR - There is provided a spindle motor, including: a sleeve fixed to a base member; a shaft rotatably inserted into the sleeve; and a rotor hub fixed to a top end portion of the shaft to be rotated together therewith and provided with an extension wall to form a liquid-vapor interface together with an outer circumferential surface of the sleeve, wherein the extension wall is provided with a protrusion portion protruded in an inner radial direction so as to reduce leakage of a lubricating fluid. | 06-05-2014 |
20140159525 | HYDRODYNAMIC BEARING ASSEMBLY AND MOTOR INCLUDING THE SAME - There are provided a hydrodynamic bearing assembly and a motor including the same. The hydrodynamic bearing assembly includes a sleeve rotatably supporting a shaft and including a first circulation hole formed therein, the first circulation hole penetrating between an inner peripheral surface thereof and an outer peripheral surface thereof; a sleeve housing into which the sleeve is inserted; and a second circulation hole formed between the outer peripheral surface of the sleeve and an inner peripheral surface of the sleeve housing to be in communication with the first circulation hole, wherein an upper portion of the second circulation hole has a larger diameter than a lower portion thereof in an axial direction. | 06-12-2014 |
20140175924 | HYDRODYNAMIC BEARING ASSEMBLY AND SPINDLE MOTOR HAVING THE SAME - There is provided a hydrodynamic bearing assembly including a sleeve; and a shaft rotatably inserted into a shaft hole and constituting a bearing clearance, wherein at least one of an inner circumferential surface of the sleeve and an outer circumferential surface of the shaft includes upper and lower radial dynamic pressure grooves having a herringbone pattern, and conditional expressions a+b>c+d and b−a>c−d>0 are satisfied. | 06-26-2014 |
20140183999 | SPINDLE MOTOR - There is provided a spindle motor including: a rotating member including a shaft having a fixation groove provided in a lower portion thereof, a hub base extended from an upper end of the shaft in an outer radial direction, and a magnet support part extended downwardly from an outer edge of the hub base in an axial direction; a sleeve rotatably supporting the rotating member and including a reception groove depressed downwardly from an upper surface thereof in the axial direction; and a stopper member including a fixation part inserted into the fixation groove and a flange part extended from the fixation part in the outer radial direction, wherein the hub base includes a protrusion part protruding from one surface of the hub base and received in the reception groove. | 07-03-2014 |
20140184000 | SPINDLE MOTOR - There is provided a spindle motor including: a sleeve rotatably supporting a shaft; a rotor coupled to an upper end of the shaft and rotating in conjunction with the shaft; a stopper portion coupled to a main wall portion protruded from one surface of the rotor and facing an outer circumferential surface of the sleeve; a stator holder having a fixed portion coupled to an outer circumferential surface of the sleeve, an installation portion to which a core having a coil wound therearound is fixed, and a connection portion connecting an upper end of the fixed portion and an upper end of the installation portion; and a base member fixedly coupled to the stator holder. | 07-03-2014 |
20140184001 | SPINDLE MOTOR - There is provided a spindle motor including a shaft including a body part and an extension part extended from an upper portion of the body part in an outer diameter direction, a sleeve rotatably supporting the shaft, and a rotor rotating together with the shaft and including a stopper part facing an outer peripheral surface of the sleeve, wherein the extension part and the rotor are coupled to each other outwardly of the outer peripheral surface of the sleeve in the outer diameter direction. | 07-03-2014 |
20140184002 | PLANETARY PUSH-PULL ELECTRIC MOTOR - A planetary push-pull electric motor comprising a ring stator fixedly mounted on the central axis of the planetary push-pull electric motor; a planetary rotor arranged to be magnetically movable around an inner circumference of the ring stator, the planetary rotor rotatably mounted on an eccentric rotor axis in respect to the central axis of the ring stator; a series of electromagnets radially mounted about the ring stator for generating magnetic fields; and a means for transferring rotation of the eccentric planetary rotor axis to directly power an output shaft, wherein when the series of electromagnets are activated, the planetary rotor is magnetically impelled to pivot and roll from one temporary, moving contact line to an adjacent one, creating a rotary moment upon each of the temporary, moving contact lines, providing a power output. | 07-03-2014 |
20140184003 | SYSTEMS AND METHODS FOR ROTATIONAL ALIGNMENT OF A DEVICE UNDER TEST - Systems and methods for rotational alignment of a device under test are disclosed herein. These systems include a chuck that includes a rotational positioning assembly that includes a lower section and an upper section that is configured to selectively rotate relative to the lower section about a rotational axis. The rotational positioning assembly further includes a first bearing that is configured to support a radial load between the upper section and the lower section and a second bearing that is configured to support a thrust load between the upper section and the lower section. The methods include providing a fluid stream to the second bearing to permit rotation of the upper section relative to the lower section, rotating the upper section relative to the lower section, and ceasing the providing the fluid stream to the second bearing to restrict rotation of the upper section relative to the lower section. | 07-03-2014 |
20140184004 | ELECTRIC MOTOR - An electric motor includes a rotor having a rotary shaft, a pair of ball bearings for supporting the rotary shaft, and two brackets having bearing housings for holding the ball bearings. The motor further includes a washer between one of the ball bearings and an end wall of one of the bearing housings. The washer includes a plurality of claws. The washer is configured including a ring-shaped yoke and the claws the center parts of which are fastened to the yoke. These claws are configured to be bent in a U-shape, and the center part of the U-shape is fastened to the yoke. | 07-03-2014 |
20140246936 | FAN MOTOR - Disclosed therein is a fan motor including: a lower bracket having a lower protrusion which is located at the central portion and has a lower bearing insertion portion therein and a space which is formed around the lower protrusion; an upper bracket having an upper protrusion which is located at the central portion and has an upper bearing insertion portion therein; a rotor located between the lower protrusion and the upper protrusion and rotating together with a shaft; and a stator core surrounded by a lower insulator which is located above the lower protrusion and an upper insulator which is located below the upper protrusion. | 09-04-2014 |
20140265685 | ELECTRIC MACHINE AND METHOD OF MANUFACTURING THE SAME - A bearing assembly cooperates with a bearing seat formed in a bearing housing. The assembly includes a bearing having an inner ring, an outer ring and a rolling element in engagement with the inner ring and the outer ring, and an anti-rotation device. The anti-rotation device engages the outer ring of the bearing and with the bearing housing to limit the rotation of the outer ring of the bearing within the bearing seat formed in the bearing housing. The anti-rotation device includes a first feature for engagement with the outer ring of the bearing and a second feature for engagement with the bearing housing. The first feature and the second feature limit the rotation of the outer ring of the bearing within the bearing seat formed in the bearing housing | 09-18-2014 |
20140265686 | ELECTRIC MACHINE AND ASSOCIATED METHOD - A bearing assembly cooperates with a bearing seat formed in a bearing housing and includes a bearing having an inner ring, an outer ring and a rolling element in engagement with the rings and an anti-rotation device. The anti-rotation device engages the outer ring to the bearing housing limiting rotation of the outer ring within the bearing seat. The anti-rotation device includes a first feature engaging the outer ring and a second feature engaging the bearing housing. The features limit the rotation of the outer ring within the bearing seat. The first feature has a resilient protrusion with a contact surface for engagement with the outer ring. | 09-18-2014 |
20140265687 | SPINDLE MOTOR - There is provided a spindle motor including: a rotating body including a sleeve part disposed between a thrust member and a flange part of a shaft, a connection part extended from the sleeve part, and a rotor hub part extended from the connection part, 0.5 mm09-18-2014 | |
20140292129 | THIN MOTOR - A thin motor includes a rotor | 10-02-2014 |
20140300231 | DOWNHOLE ELECTRIC SUBMERSIBLE PUMPS WITH HIGH ROTORDYNAMIC STABILITY MARGIN - An electric submersible pump is provided which has improved vibrational characteristics relative to conventional electric submersible pumps. The improved electric submersible pumps comprise an electric motor mechanically coupled to a pumping section. The improved vibrational characteristics of the electric submersible pump are attributed to the presence of one or more rotor bearings selected from the group consisting of herringbone patterned rotor bearings, pressure dam rotor bearings, circumferential groove rotor bearings, and combinations of two or more of any of the foregoing rotor bearings. | 10-09-2014 |
20140306564 | STANDPIPE ASSEMBLY - A standpipe assembly to connect to a starter/generator housing includes a standpipe with a first end that sits within the housing and a second end that connects to the standpipe base; and one or more brackets to secure the standpipe to the housing. The housing includes a standpipe base formed integral to the housing. | 10-16-2014 |
20140306565 | Coaxial Motor - An electric motor design is described including coaxial, concentric multiple cylindrical stators and rotors with air gap registration maintained and rotor rotation and fixed stator position facilitated by use of one or more precision bearings mounted on a common shaft. The multiphase stator winding routing is facilitated by the use of multilayer printed circuit boards to allow multiphase excitation of the stator winding to provide induction motor drive to the rotor. The rotor is a double squirrel cage design that allows supplemental resistors and inductors to augment the construction materials inherent physical resistance and inductance of the squirrel cage. The design is further enhanced for high torque startup by construction superposition of a reluctance motor feature incorporated into the squirrel cage rotor construction. | 10-16-2014 |
20140312727 | ROTATING ELECTRIC MACHINE - Provided is a rotating electric machine capable of preventing an outer race of a bearing from rotating because of a reduction in force for coupling a bearing housing portion and the outer race of the bearing. A resin case ( | 10-23-2014 |
20140346908 | ELECTRIC MACHINE COMPRISING A DEFORMABLE STATOR - An electric machine, in particular a generator for a wind turbine, is provided. The electric machine has a rotor and a stator, wherein the rotor is arranged rotatably relative to the stator about an axis of rotation. The rotor and the stator are arranged in such a way that a stator surface of the stator and a rotor surface of the rotor are spaced apart from one another. The rotor surface is circular about the axis of rotation. The stator is deformable in such a way that the stator surface has a non-circular surface profile about the axis of rotation without any magnetic interactions between the rotor and the stator being exerted within at least one segment of the stator, and that, in the event that magnetic interactions between the rotor and the stator are exerted, the stator is deformed in such a way that the stator surface is circular about the axis of rotation, with the result that a spacing between the stator surface and the rotor surface is constant. | 11-27-2014 |
20140354097 | ROTATING ELECTRIC MACHINE - To obtain a rotating electric machine with a simple configuration, including a clearance filling member which can be easily assembled to a bearing housing portion without requiring time and does not adversely affect an outer race of a bearing, provided is an AC generator for a vehicle including a resin case ( | 12-04-2014 |
20150008780 | MOTOR ROTOR BEARING WITH TEMPERATURE-ACTIVATED STABILIZERS - A bearing assembly for use in an electric motor has a temperature-activated stabilizer to reduce vibration. The electric motor has a stator assembly and a rotor assembly and the bearing assembly includes a collar that has an outer diameter that is less than an inner diameter of the stator assembly. The bearing assembly further includes a temperature-activated stabilizer assembly that includes an extensible member positioned within the stabilizer recess. Under a first temperature the extensible member has a first volume and under a second temperature the extensible member expands to a second volume that is larger than the first volume. As the extensible member expands, the extensible member comes into contact with the stator assembly. | 01-08-2015 |
20150015106 | SPINDLE MOTOR, ELECTRONICS DEVICE AND DISK DRIVE APPARATUS - A rotating portion of a spindle motor includes a rotor magnet, a circular plate portion, and an annular raised portion that projects downward from the circular plate portion. A stationary portion includes a stator, a base portion, and an annular recessed portion configured to accommodate the raised portion. The raised portion includes an inner circumferential surface and an outer circumferential surface. The inner circumferential surface is positioned radially opposite a first side surface of the recessed portion with a first minute gap intervening therebetween. The outer circumferential surface is positioned radially opposite a second side surface of the recessed portion with a second minute gap intervening therebetween. The first minute gap has an axial dimension greater than an axial dimension of a seal portion. | 01-15-2015 |
20150035401 | Motor - A motor includes a base, a stator unit and a rotor. The base includes a shaft tube receiving a sleeve bearing and a positioning member. The positioning member positions the sleeve bearing and includes a hole having a minimal diameter. The stator unit is arranged on the base. The rotor includes a shaft and a permanent magnet. The shaft extends through the hole of the positioning member and rotatably couples with the sleeve bearing. An air gap is formed between the permanent magnet and the stator unit. The shaft has a maximal diameter, and the minimal diameter of the hole of the positioning member is larger than 1.05 times of the maximal diameter of the shaft but is smaller than or equal to two times of the maximal diameter of the shaft. | 02-05-2015 |
20150054367 | METHOD OF AND A DEVICE FOR PROTECTING A MOTOR IN A POD AGAINST SHAFT BENDING SHOCKS - A method of and a device for protecting an electric motor ( | 02-26-2015 |
20150084461 | INNER-ROTOR MOTOR - A motor includes a shaft supported by upper and lower bearings and rotatable about an axis; a rotor magnet fixed to the shaft; a stator arranged radially outside and opposite to the rotor magnet with a gap therebetween; an upper bracket holding the upper bearing; and a lower bracket holding the lower bearing. The upper bracket includes an upper cylindrical cover press fitted to a stator core from above, an upper bearing holding portion, and a top plate portion arranged to join the upper cylindrical cover and the upper bearing holding portion. The lower bracket includes a lower cylindrical cover press fitted to the stator core from below, a lower bearing holding portion, and a bottom plate portion arranged to join the lower cylindrical cover and the lower bearing holding portion. Each of the upper and lower brackets is fixed to the stator core through press fitting. | 03-26-2015 |
20150084462 | ROTOR STRUCTURE OF ROTARY ELECTRIC MACHINE - Provided is a rotor structure of a rotary electric machine, which is easily adaptable to offer a wide variety of products. The rotor structure of a rotary electric machine includes at least: a rotor shaft ( | 03-26-2015 |
20150084463 | BEARING MECHANISM, SPINDLE MOTOR INCLUDING THE BEARING MECHANISM AND ELECTRONIC EQUIPMENT INCLUDING THE SPINDLE MOTOR - A bearing mechanism includes a stationary portion and a rotating portion. The stationary portion includes a shaft portion and a plate portion. The rotating portion includes a sleeve including an annular portion, a cylindrical portion, an annular bottom surface, and a first communication hole. The rotating portion includes a ring member arranged to cover at least a portion of an opening of the first communication hole, and faces the plate portion via a first gap. A pumping groove array is disposed in the plate portion or the ring member. A second communication hole is disposed between the ring member and the annular bottom surface, and connected to the first communication hole. At least a portion of the opening of the second communication hole is positioned on a farther radial direction inner side than the pumping groove array. | 03-26-2015 |
20150137641 | MOTOR - A motor includes a stator, a rotor tube which is disposed inside the stator, a rotor core assembly which is coupled to an outer circumferential surface of the rotor tube, and a shaft which is coupled in the rotor tube. The rotor tube is divided into at least two stepped regions having different diameters. A multiple-row bearing has an inner wheel coupled to an outer circumferential surface of any one of the at least two stepped regions, and rotatably supports the rotor tube. Such a configuration ensures structural stability of the motor and minimizes a space occupied by a bearing. | 05-21-2015 |
20150295466 | METHOD FOR SEALING ELECTRIC MOTORS FOR THE APPLICATION OF LUBRICATION BY MIST - A sealing arrangement for an electric motor having a drive shaft passing through a back cover and through a housing chamber holding bearings that surround the drive shaft, the sealing arrangment including a bushing disposed within the back cover and surrounding the drive shaft for preventing leakage of lubricant and supporting the drive shaft, the bushing made from a composite material that includes carbon fibers suspended in a PTFE matrix. | 10-15-2015 |
20150311767 | MOTOR - A motor includes a stator unit, a rotor unit, and an anti-friction bearing unit. The stator unit includes a coil winding assembly. The rotor unit includes a permanent magnet assembly disposed to radially confront the coil winding assembly, and is rotatable relative to the stator unit as a result of electromagnetic forces acting between the permanent magnet assembly and the coil winding assembly. The anti-friction bearing unit is disposed between the stator and rotor units so as to stabilize rotation of the rotor unit. | 10-29-2015 |
20150318754 | ROTOR-HOLDING STRUCTURE OF ROTATING ELECTRICAL MACHINE FOR HYBRID VEHICLE - It is an object of the present invention, to provide a rotor-holding structure of a rotating electrical machine for hybrid-vehicle, the structure being capable of ensuring a space is present between a stator and a rotor. A rotating electrical machine includes a stator and a rotor, the stator being fixed to a housing, and the rotor being disposed opposite to stator across a predetermined space, wherein the rotor has a rotor boss section, a rotor core, and a permanent magnet. The rotor boss section is rotatably attached to the housing through a bearing. The rotor core and the permanent. magnet are attached to the rotor boss section. Multiple through-holes are provided at the respective corresponding locations of the housing and the rotor boss section. A supporting member is passed through each of the through-holes, thereby holding the rotor boss section. | 11-05-2015 |
20150318755 | FITTING OF A STATOR BODY IN A BEARING OF A ROTARY ELECTRICAL MACHINE, AND ROTARY ELECTRICAL MACHINE COMPRISING FITTING OF THIS TYPE - The fitting of a stator ( | 11-05-2015 |
20150318756 | FAN MOTOR - A fan motor including: a lower bracket through which a rotary shaft passes and having a lower bearing insertion space formed around the rotary shaft; an upper bracket through which the rotary shaft passes and having an upper bearing insertion space formed around the rotary shaft; a lower bearing forcedly pressed and fixed at a lower bearing seating portion formed above the lower bearing insertion space; an upper bearing forcedly pressed and fixed at an upper bearing seating portion formed above the upper bearing insertion space; a rotor rotatably joined to the rotary shaft inside the upper bracket; a stator located around the rotor; a lower felt cover having a lower bearing supporting portion for supporting the lower portion of the lower bearing; and an upper felt cover having an upper bearing supporting portion for supporting the lower portion of the upper bearing. | 11-05-2015 |
20150357875 | ACTUATOR - To provide an actuator in which an unstable movement of a rotor is controlled. An actuator includes a coil, a bobbin around which the coil is wound, a rotor positioned inside the bobbin, a shaft to which the rotor is fixed and which is rotatably supported, a stator including a base portion positioned on one end side of the shaft, outer magnetic pole portions extending from the base portion along the shaft and positioned outside the bobbin and inner magnetic pole portions extending from the base portion along the shaft and positioned between the rotor and the inside of the bobbin, a stator including a base portion positioned on the other end side of the shaft, outer magnetic pole portions extending from the base portion along the shaft and positioned outside the bobbin and inner magnetic pole portions extending from the base portion along the shaft and positioned between the rotor and the inside of the bobbin and a cover positioned between the rotor and the stator and contacting tip portions of the inner magnetic pole portions to regulate the approach of the inner magnetic pole portions to the rotor. | 12-10-2015 |
20150372550 | MOTOR ROTOR ASSEMBLY AND MOTOR COMPRISING THE SAME - A motor rotor assembly including: a rotor core, a plurality of permanent magnets, and end plates. The permanent magnets are disposed on the rotor core, and the end plates are disposed at two end surfaces of the rotor core, respectively. A plurality of grooves is disposed at the outer edge of the top surface of the end plates, a plurality of convex columns protrudes from the bottom wall of the end plates. | 12-24-2015 |
20160020663 | BEARING UNIT AND MOTOR - The bearing unit comprises: a bearing housing, which is composed of resin, being formed into a cylindrical shape and having an outer periphery, on which a stator core will be integrally attached; a rotation stopper section being formed in an outer wall face of the bearing housing, the rotation stopper section being capable of fitting to the stator core so as to prohibit the stator core from rotating in a circumferential direction; and a retainer section being formed in the outer wall face of the bearing housing, the retainer section being formed by thermally deforming an outer wall section of the bearing housing to overlap an end face of the stator core so as to retain the stator core. | 01-21-2016 |
20160036307 | CLOSED LOOP LEVERAGING ELECTROMAGNETIC MOTOR - The invention is a high torque and energy efficient electric motor. With a larger diameter shaft and shortened length, the design of the motor is pancaked. With high torque, the electric motor can operate efficiently by taking advantage of repelling and attracting forces from magnetic fields. Two embodiments of the invention for the high torque motor are designed to be energy efficient utilizing lifting design electromagnets, and low current flow in relation to the magnetic field produced is a key element of the invention. | 02-04-2016 |
20160040712 | FLUID DYNAMIC BEARING DEVICE AND MOTOR PROVIDED WITH SAME - Provided is a fluid dynamic bearing device ( | 02-11-2016 |
20160047420 | BEARING UNIT AND MOTOR - The bearing unit comprises: a cylindrical bearing housing composed of resin; and a metallic bearing section provided in the bearing housing. Recessed grooves and projected stripes are formed in an inner wall surface of a cylindrical hole of the bearing housing and an outer circumferential surface of the bearing section. The recessed grooves and the projected stripes are recession/projection-fitted to each other. Number of the recessed grooves is greater than that of the projected stripes. The bearing section is fitted into the bearing housing in a state where the recessed grooves are aligned with the projected stripes. The recessed groove not recession/projection-fitted to the projected stripe forms a space communicating to the cylindrical hole. | 02-18-2016 |
20160061254 | BEARING ASSEMBLY AND METHOD FOR ASSEMBLING AND MOUNTING SAID BEARING ASSEMBLY WITH A COMPONENT SUPPORTING SAID BEARING ASSEMBLY - A bearing assembly includes at least one ring arranged between first and second components, and the second component is mounted for rotation relatively to the first component. The bearing assembly includes at least one layer of expandable material disposed radially between a first ring of the at least one ring and one of the first and second components. The at least one layer of expandable material has been irreversibly expanded by heating it to a temperature above a first temperature threshold. | 03-03-2016 |
20160065009 | External Rotor Motor - An external rotor motor includes: a shaft, an insulator and a core, wherein the insulator is coupled with an outer peripheral surface of the shaft, the core is arranged on an outer periphery of the insulator, and the insulator is formed between the shaft and the core, so that no electrically conductive route can be formed between the core and the shaft; and a rotor having a housing rotatably coupling with the shaft, with an inner peripheral wall of the housing having a permanent magnet module. | 03-03-2016 |
20160065029 | OUTER ROTOR TYPE BRUSHLESS MOTOR - A brushless motor is provided with: a shaft; a rotor; a stator; a cylindrical oil-retaining bearing; a bearing holding part; an attraction magnet disposed at a position facing one end of the shaft and configured to attract the shaft by a magnetic force; and a thrust plate disposed between the attraction magnet and the one end of the shaft, wherein a magnet holder made of a magnetic material is formed integrally to the bearing holding part, the magnet holder being installed with the attraction magnet, and wherein a side of the magnet holder, on which the attraction magnet is installed, is covered by a material for forming the bearing holding part, except for an installation surface on which the attraction magnet is installed, or for a proximity of the installation surface. | 03-03-2016 |
20160072357 | FAN MOTOR - Provided is a fan motor that includes: a rotor that is coupled with a shaft to rotate together; a stator that is installed at a position facing the rotor; a first bracket on a central upper portion of which a first bearing insertion space into which a first bearing coupled to an upper portion of the shaft is inserted is formed; a second bracket which is hermetically coupled to the first bracket and on a central lower portion of which a second bearing insertion space into which a second bearing coupled to a lower portion of the shaft is inserted is formed; a first bearing cover that covers the first bearing insertion space; and a second bearing cover that covers the second bearing insertion space and has an accommodation space formed to extend to the central lower portion. | 03-10-2016 |
20160087505 | AXIAL FLUX ELECTRICAL MACHINE BEARING MOUNT SYSTEM AND METHODS - An axial flux electrical machine includes a housing having a center portion with a cylindrical wall, a stator assembly attached to the housing, a bearing assembly attached to the stator assembly, and a rotor assembly rotatably attached to the bearing assembly. A bearing mount system includes a bearing isolator that is attached to the wall of the housing, and a bearing cup that is attached to the bearing assembly and the bearing isolator. | 03-24-2016 |
20160099626 | DRIVE UNIT, ESPECIALLY AN ACTUATOR UNIT IN A VEHICLE - A drive unit, especially an actuator unit in a vehicle, comprises an electric drive motor the motor shaft of which is rotatably mounted in bearings. A clamping ring is arranged in a housing and axially supports a bearing of the motor shaft. | 04-07-2016 |
20160102706 | Fluid-Dynamic Bearing System - The invention relates to a fluid-dynamic bearing system, in particular for the rotary support of a spindle motor, the bearing system comprising: a first conical bearing and a second conical bearing counteracting the first conical bearing, a fixed shaft along which the two conical bearings are arranged, a sleeve, a first and a second conical bearing component, which together with the sleeve form the first and second conical bearings, bearing structures applied to the sleeve and/or the conical bearing components, a bearing gap filled with a bearing fluid extending between the sleeve and the shaft and between the sleeve and the conical bearing components and sealed at each of its ends by a conical capillary seal, and a hub which rotates together with the sleeve about a rotation axis. The invention is characterized in that a pump seal is arranged between the first conical bearing and the adjacent capillary seal. | 04-14-2016 |
20160118856 | MOTOR ABLE TO PREVENT ENTRY OF FOREIGN MATTER INSIDE HOUSING - A motor which prevents the generation of noise from a bearing and prevents shortening of the life of the bearing while preventing the entry of foreign matter inside of a housing. The motor | 04-28-2016 |
20160138651 | SINTERED BEARING AND METHOD OF MANUFACTURING SAME - A sintered bearing includes a sintered metal formed by using a metal powder mixture containing copper powder and iron powder. The metal powder mixture contains 80 wt % or more of particles having an average particle diameter of less than 45 μm. The copper powder contains electrolytic copper powder. The electrolytic copper powder contains 40 number % or more of particles having a circularity of 0.64 or more. | 05-19-2016 |
20160164353 | Halbach Array Electric Motor with Substantially Contiguous Electromagnetic Cores - Halbach array electric motor with substantially contiguous electromagnetic cores, comprised of rotors and stators usually configured as permanent magnet and electromagnetic Halbach arrays respectively, wherein the enhanced magnetic forces of said Halbach arrays are focused between said rotors and stators. | 06-09-2016 |
20160172924 | MOTOR WITH ADHESIVE STRUCTURE BETWEEN BASE AND SHAFT SUPPORTING MEMBER | 06-16-2016 |
20160172931 | Alternator rotor to stator integrated hrdrodynamic bearing | 06-16-2016 |
20160254714 | MOTOR | 09-01-2016 |
20160376741 | WASHING MACHINE MOTOR AND WASHING MACHINE COMPRISING SAME - Provided is a washing machine motor including: an inner rotor connected with an outer shaft; an outer rotor connected with an inner shaft; and a stator disposed with an air gap between the inner rotor and the outer rotor,wherein the outer shaft is rotated at the same speed as that of the inner rotor, and the rotational speed of the inner shaft is decelerated compared to that of the outer rotor so as to increase a torque, and wherein a first bearing and a second bearing are disposed on an outer surface of the outer shaft in order to rotatably support the outer shaft, and the first bearing is mounted in the stator. The washing machine motor includes a planetary gear set that decelerates the rotational speed of the inner shafts and increases the torque, to thereby implement a large-capacity washing machine. | 12-29-2016 |
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