| THK CO., LTD. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120097825 | BASE ISOLATION TABLE WITH DAMPING MECHANISM AND BASE ISOLATION TABLE UNIT USING THE SAME - Provided are a vibration isolating table ( | 04-26-2012 |
| 20120073396 | MOTION GUIDE DEVICE AND SCREW DEVICE - Provided are a motion guide device and a screw device each having a cover for protecting the device against moisture, such as coolant, and powder dust. The motion guide device has a raceway member | 03-29-2012 |
| 20120025635 | LINEAR MOTOR ACTUATOR - Provided is a linear motor actuator capable of oscillating a mover without using mechanical resilience of an elastic body. A first permanent magnet | 02-02-2012 |
| 20120024093 | BALL-SCREW SPLINE - Provided is a ball-screw spline which contributes to downsizing through reduction of an entire length of a spline shaft, while securing a sufficient stroke amount of a spline nut with respect to the entire length of the spline shaft. The ball-screw spline includes: a screw shaft; a ball-screw nut threadedly engaged with the screw shaft through intermediation of balls; and a spline nut assembled to an outside of the ball-screw nut through intermediation of balls to freely reciprocate in an axial direction of the ball-screw nut, in which the ball-screw nut includes a screw portion and an extended portion which are formed integrally with each other with the same outer diameter, in which the screw portion has an inner peripheral surface provided with: a load-rolling groove which forms a load path for the balls together with a ball rolling groove on the screw shaft side; and a ball return path coupling adjacent valley portions of the load-rolling groove so as to form an infinite circulation path corresponding to one loop around the screw shaft, and in which the ball-screw nut has an outer peripheral surface provided with a ball rolling groove for the spline nut, the ball rolling groove for the spline nut being formed over a range corresponding to the screw portion and the extended portion. | 02-02-2012 |
| 20120017713 | ROLLING ELEMENT SCREW DEVICE - Provided is a rolling-element screw device which does not sacrifice a stroke distance of a nut member ( | 01-26-2012 |
| 20110301540 | SYRINGE DRIVE UNIT - Provided is a syringe drive unit ( | 12-08-2011 |
| 20110181129 | LINEAR AND ROTARY ACTUATOR - Provided is a linear and rotary actuator capable of bearing moment and load from a movable body and downsizing its radial dimension. A spline shaft is held in housings to be movable linearly in the axial direction and rotatable about the axis. The spline shaft is connected to a mover shaft of a linear motor. The spline shaft is surrounded with a hollow rotor of a rotary motor. The rotor is connected to a spline nut which transmits rotation of the rotor to the spline shaft by rotating together with the rotor and allows linear movement of the spline shaft. The rotor of the rotary motor is rotated by a stator of the rotary motor. The spline nut, the stator of the rotary motor and a stator of the linear motor are arranged in this order from an end of the spline shaft and mover shaft along the axial direction. | 07-28-2011 |
| 20110156619 | LINEAR SYNCHRONOUS MOTOR CONTROL METHOD AND CONTROL APPARATUS - It makes possible to control a movable element to be smoothly movable by a sensor-less vector control in an equal speed area, without using a position sensor, and possible to perform a stop control and control it in a low speed area. In a case when a moving speed of the armature is faster than a predetermined speed preliminarily determined within a range in which the movable element is moved in synchronous with movement of the magnetic field generated by the armature by a predetermined sensor-less vector control, the current passing through the armature is controlled by the sensor-less vector control, and in a case when the moving speed of the armature is slower than the predetermined speed, in a d-q coordinate in which a d-axis represents a direction of a flux generated by field and a q-axis represents a phase advanced by π/2 with respect to the d-axis, a d-axis armature current and a q-axis armature current are controlled so that a d-axis electric angle is produced, and current passes through the d-axis armature and does not pass through the q-axis armature. | 06-30-2011 |
| 20110138942 | SEAL PLATE FOR A MOVEMENT GUIDE DEVICE - Provided is a seal plate ( | 06-16-2011 |
| 20110135226 | LINEAR MOTION GUIDANCE APPARATUS - A linear motion guidance apparatus suppresses a waving phenomenon, and includes a track rail with rolling member rolling grooves along the longitudinal direction, a movable block with loaded rolling member rolling grooves that face the rolling member rolling grooves, and a plurality of balls rollably provided in loaded rolling paths formed of the rolling member rolling grooves and the loaded rolling member rolling grooves. The movable block can make reciprocating motion in the longitudinal direction of the track rail. The linear motion guidance apparatus is configured so that the diameter of each of the balls is 1/10 of the width of the track rail or smaller and the movable block has a block length compliant with ISO. The number L of endless circulation paths is L=4×N (N is a natural number greater than or equal to two), and in particular, the number of paths L is preferably eight. | 06-09-2011 |
| 20110126648 | SEALED LINEAR ACTUATOR UNIT - A linear actuator unit has a slide plate which is allowed to freely move along the outer rail while causing a cover to retreat. The linear actuator unit includes: an outer rail, which is formed into a cylindrical shape, and includes the slit-opening portion formed along an axial direction thereof; the slide plate ( | 06-02-2011 |
| 20110110615 | TRACK RAIL AND MOTION GUIDANCE APPARATUS INCLUDING THE TRACK RAIL - Rigidity and precision of a motion guidance apparatus are increased by improving track rail shape. A track rail has at least two rolling member rolling grooves (RMRGs) on the upper surface and at least one RMRG on each side surface, the RMRGs extending in the longitudinal direction. When the RMRGs are taken along a cross-sectional plane perpendicular to the longitudinal direction of the track rail, and two imaginary lines extending vertically downward are drawn from ends of the respective grooves located on the outer sides among upper surface RMRGs, all the side surface RMRG are positioned in the rail but outside the corresponding one of the two imaginary lines, and at least portions of the upper surface and the side surfaces of the track rail, on which the RMRGs are formed, the portions being in the vicinity of the respective RMRGs, are formed with an inclination angle. | 05-12-2011 |
| 20110072667 | METHOD OF MANUFACTURING A SPHERICAL BEARING - Provided is a method of manufacturing a spherical bearing having an inside member with a metal ball portion and an outside member having a ball support portion enclosing and supporting the ball portion of the inside member and connected to the inside member swingably or rotatably relative to each other, including the steps of performing injection molding in which the ball portion of the inside member is inserted as a core in a mold to mold a resin liner covering the ball portion, molding the outside member covering the resin liner by a casting in which the ball portion and the resin liner are inserted as a core in the mold, and after the completion of the casting, heating the resin liner covering the ball portion through the ball portion of the inside member. | 03-31-2011 |
| 20110043159 | SERVO MOTOR POSITION CONTROL DEVICE - Provided is a technique to suppress hunting in a range of a minimum resolution of a pulse encoder when a servo motor has reached a target position and stopped, thereby maintaining a stable stop state. A servo motor position control device uses a cascade configuration having a position control loop as a main loop and a velocity and current control loop as a minor loop. A proportion control is performed for a position control while a proportion integration control is performed for a velocity control and a current control. When the servo motor position has reached the target position and stopped (S | 02-24-2011 |
| 20110041629 | MOTION DEVICE AND MOVING DEVICE - The present invention relates to a motion device and a moving device in which the total size in a direction perpendicular to the longitudinal direction of an orbital element can be reduced to extremely smaller sizes and miniaturization can be accomplished. A motion device | 02-24-2011 |
| 20110001282 | ROTARY TABLE DEVICE PROVIDED WITH COOLING STRUCTURE AND ROTARY BEARING PROVIDED WITH COOLING STRUCTURE - A rotary table device includes a cooling structure and a rotary bearing provided with a cooling structure. A rotary table device provided with a cooling structure includes a hollow motor as a drive source, a table rotated by the hollow motor, and a rotary bearing supporting rotational motion of the table, in which the rotary bearing includes an outer ring having an inner peripheral surface to which a rolling surface is formed, an inner ring having an outer peripheral surface to which a rolling surface facing the rolling surface of the outer ring is formed, and a number of rolling members in a rolling passage formed by the rolling surface of the outer ring and the rolling surface of the inner ring, and a heat sink is formed to either one of the inner and outer rings. | 01-06-2011 |
| 20100314006 | STEEL FOR INDUCTION HARDENING WITH EXCELLENT COLD WORKABILITY, ROLLING MEMBER MADE OF THE SAME, AND MOTION GUIDE DEVICE USING ROLLING MEMBER - This steel for induction hardening contains, by percent by mass, C: 0.7 to 0.9%, Si: 0.4 to 1.0%, Mn: 0.5 to 1.25%, P: 0.030% or less, S: 0.030% or less, Cr: 0.4% or less, Al: 0.05% or less, Ti: 0.003% or less, and O: 0.0020% or less, wherein [Mn]≦0.5+0.35/[Si] is met, the steel further contains Fe and unavoidable impurity and the steel has annealing hardness of 93 HRB or less, and wherein an induction hardening layer after induction hardening has residual austenite of 20 to 40% and hardness of 61 HRC or more. This makes it possible to provide steel for induction hardening in which lowering of a fatigue life hardly occurs even though foreign objects incorporates into lubricating oil of a motion guide device and concentration of stress on its dent causes flaking due to lubrication failure to be generated on a steel surface of a device, or even though rolling/sliding contact occurs. | 12-16-2010 |
| 20100284641 | ROTATION RING - Provided is a slewing ring which has a structure with a large slewing diameter, and is readily produced at low cost. The slewing ring includes: an outer ring ( | 11-11-2010 |
| 20100282011 | ROLLER SCREW AND METHOD OF CIRCULATING ROLLERS IN ROLLER SCREW - There is provided a roller screw in which a twisted amount of an unloaded return path is reduced. | 11-11-2010 |
| 20100263467 | ROLLER SCREW - Provided is a roller screw capable of preventing rollers moving from an unloaded return path to a loaded roller rolling path from coming into collision with a scooping portion. The roller screw has: a screw shaft | 10-21-2010 |
| 20100259209 | MULTI-AXIS DRIVER CONTROL METHOD, MULTI-AXIS DRIVER AND MULTI-AXIS DRIVE CONTROL SYSTEM HAVING THE SAME - Provided is a multi-axis driver control method that enables communications with drive-axis basis controllers of a multi-axis driver with use of a single general-purpose external interface. | 10-14-2010 |
| 20100242652 | BALL SCREW DEVICE - Provided is a ball screw device having a novel ball circulation structure suitable for a screw shaft with a large lead, optimum for downsizing and weight saving of a nut member, capable of being manufactured at low cost, and capable of exhibiting high reliability even under severe use conditions. In a ball screw device ( | 09-30-2010 |
| 20100242651 | ROLLING-ELEMENT SCREW DEVICE - Provided is a rolling-element screw device in which a recess can be easily formed in an outer diameter portion of a nut main body for receiving a circulation member. At both ends of a straight passage | 09-30-2010 |
| 20100236345 | ROLLING BODY SCREW DEVICE - There is provided a new rolling body screw device manufactured with cheap cost without degrading quality in comparison with a conventional device even for a device having any large dimension in an end-cap type rolling body screw device. The rolling body screw device includes the direction changing passages | 09-23-2010 |
| 20100207464 | LINEAR MOTOR AND LINEAR MOTOR COGGING REDUCTION METHOD - Provided is a linear motor capable of reducing cogging. | 08-19-2010 |
| 20100206102 | LINEAR ACTUATOR WITH DUSTPROOF MECHANISM - A linear actuator with a dustproof mechanism provides reliable dustproof capability over the entire stroke of the actuator. A linear actuator | 08-19-2010 |
| 20100194210 | LINEAR ACTUATOR UNIT - Provided is a linear actuator unit capable of suppressing flexure of a magnet rod ( | 08-05-2010 |
| 20100192711 | ROLLING DEVICE - A rolling device having high silencing effect and requiring no positional alignment working to the seal is provided. The rolling device includes an inner member, an outer member and a number of rolling members disposed between these inner and outer members to thereby allow the outer member to carry out relative rotational motion with respect to the inner member. In such rolling device, an end plate | 08-05-2010 |
| 20100171459 | LINEAR MOTOR POSITION DETECTION SYSTEM - Provided is a position detection system which is inexpensive and does not need to control the accuracy of mounting a sensor strictly. | 07-08-2010 |
| 20100164306 | LINEAR MOTOR - A linear motor is provided with a stator, a slider disposed to be movable relatively with respect to the stator with a gap, and a non-magnetic plate mounted to either one of the stator and the slider so as to define the gap between the stator and the slider. | 07-01-2010 |
| 20100158420 | METHOD OF MANUFACTURING MOTION GUIDE DEVICE AND MOTION GUIDE DEVICE MANUFACTURED BY THE METHOD - There is performed a treatment including a grinding working step of grinding at least a portion of a rolling surface and a sliding surface of a motion guide device using a rolling member by a grinding working using a grinding stone, and a surface treating step of effecting a peening treatment to a friction surface formed by the grinding working to render a defect on the friction surface caused by the grinding working harmless. By manufacturing a motion guide device through such treating steps, a defect such as flaw generated on the friction surface is made harmless, the fatigue strength, sliding performance and lifetime of the device can be improved. Even in a travelling distance test, a travelling distance largely over a calculated lifetime could be achieved. | 06-24-2010 |
| 20100158419 | SEALING MEMBER FOR ROLLING DEVICE AND ROLLING DEVICE - A sealing member for a rolling device is applied to a rolling device with inner and outer members and a plurality of rolling members between so the rolling members can roll to allow relative rotational or linear movement of the outer member with respect to the inner member. The sealing member includes an inner and outer lip parts that press the inner and outer members, respectively. The outer lip part is less rigid than the inner lip part. The sealing member may have a substantially circular shape and surround the inner member. Alternatively, the sealing member may have a substantially plate-like shape and extend in a direction of relative movement of the outer member with respect to the inner member. The sealing member for a rolling device configured as described above and a rolling device provided with the sealing member can be adequately used even in a hostile environment. | 06-24-2010 |
| 20100150483 | MOTION GUIDE DEVICE AND METHOD OF PRODUCING THE SAME - Provided is a motion guide device achieving both of high strength and weight reduction and yet having excellent mass-productivity. | 06-17-2010 |
| 20100127578 | X-Y TABLE ACTUATOR - Provided is an X-Y table actuator, which is capable of moving and positioning a movable table ( | 05-27-2010 |
| 20100102496 | ROTARY BEARING, ROTARY TABLE DEVICE AND TABLE DIAMETER DETERMINING METHOD - A rotary table device includes a hollow motor drive source, a table rotated thereby, and a rotary bearing supporting the table. The rotary bearing is provided an outer race having an inner surface to which a rolling surface is formed, an inner race having an outer peripheral surface to which a rolling surface opposing to the rolling surface of the outer race is formed, and a plurality of rolling members disposed in a rolling passage formed by the rolling surface of the outer race and the rolling surface of the inner race, and a cooling medium passage (α, β) is formed so as to be adjacent to either one of the inner race and outer race constituting a rotational driving side. According to the structure mentioned above, a rotary bearing and a rotary table device capable of achieving suitable cooling effect can be provided. | 04-29-2010 |
| 20100101348 | SCREW DEVICE MANUFACTURING METHOD AND SCREW DEVICE - A method of producing a screw device, having high productivity and capable of achieving sufficient strength of a nut. The method of producing a screw device has a groove forming step for previously forming a load ball rolling groove in a flat plate, which step is followed by a nut forming step for forming a nut by bending the flat plate into a ring. Since the method has, after the groove forming step in which the load rolling groove is formed in the flat plate, the nut forming step in which the flat plate is bent into a ring, sufficient strength of the nut can be easily achieved, and in addition, high compression stress is left in the load ball rolling groove in the inner diameter surface of the nut. | 04-29-2010 |
| 20100101347 | ROLLER SCREW AND METHOD OF MANUFACTURING THE SAME - The present invention provides a roller screw which bears loads in both directions along the axis of the screw shaft and which is also capable of preventing interference between each roller end surface and roller rolling grooves. Between roller rolling surfaces | 04-29-2010 |
| 20100098358 | BALL SPLINE DEVICE - Provided is a ball spline device, in which an outer diameter of a nut member can be downsized to the maximum while sufficiently performing an original function, and which can keep reliability while being capable of being simply manufactured at lower cost without involving time and effort in assembly, in which a nut member has a track groove which is formed on an inner peripheral surface facing a spline shaft, the balls circulating in the track groove, the track groove comprises: a linear load groove formed so as to face the ball rolling groove of the spline shaft; a linear non-load groove provided parallel to the linear load groove; and a pair of ball deflection grooves for communicably coupling the linear load groove and the linear non-load groove with each other so as to allow the balls to intercommunicate therebetween, and the ball deflection grooves forcibly change an advancing direction of the balls rolling in the ball rolling groove and cause the balls to depart from the ball rolling groove with use of a profile of the spline shaft. | 04-22-2010 |
| 20100095793 | STEERING DEVICE USING BALL SCREW - Provided is a steering device which can be reduced in size and weight and easily adapted even to a vehicle with a small engine room, such as a front-wheel-drive car. The steering device includes: a relay rod rotatably supported with respect to a gear casing and having a spiral ball rolling groove formed therein; an input shaft to which rotation of a steering shaft is transmitted; a rotation transmitting means for converting rotation of the input shaft into rotational movement of the relay rod and for allowing the relay rod to move in an axial direction thereof; a screw nut threadedly engaged with the ball rolling groove of the relay rod through an intermediation of a large number of balls and fixed to the gear casing, for allowing the relay rod to move in accordance with rotation of the relay rod in the axial direction thereof; a pair of tie rods for moving steerable wheels in accordance with axial movement of the relay rod; and a pair of spherical bearings for transmitting the axial movement of the relay rod to the tie rods without transmitting the rotational movement of the relay rod to the tie rods. | 04-22-2010 |
| 20100080496 | MOTION GUIDE DEVICE - Provided is a motion guide device capable of guiding a moving body smoothly without rattle and facilitating separation of the moving body from a main body. The motion guide device includes: a raceway rail having a rolling-element rolling part; a moving block having a rolling-element circulation path including a loaded rolling-element rolling part facing the rolling-element rolling part of the raceway rail and being mounted on the raceway rail movable relative to the raceway rail; a plurality of rolling elements arranged in the rolling-element circulation path of the moving block; and the raceway rail having a mounting member which does not have the rolling-element rolling part and is configured to be mounted onto a counterpart device, and a raceway rail main body which has the rolling-element rolling part and is configured to be mounted on the mounting member detachably. | 04-01-2010 |
| 20100072924 | METHOD FOR CONTROLLING AC LINEAR MOTORS, DEVICE FOR DRIVING AC LINEAR MOTORS, AND SYSTEM OF AC LINEAR MOTORS - Provided is a method for controlling a plurality of AC linear motors of identical specifications which are connected each other and operated synchronously so that they appear to operate as a single linear motor having desired power. | 03-25-2010 |
| 20100060087 | DRIVE GUIDE APPARATUS - A drive guide device capable of effectively releasing heat produced by a mover. The drive guide device has a movement unit | 03-11-2010 |
| 20100058885 | MOTION GUIDE DEVICE - A motion guide device is provided which comprises a chain of rollers in which retainers are interposed, in which the chain of rollers is given a degree of freedom of rotation. The motion guide device comprises a track member ( | 03-11-2010 |
| 20100031856 | WIRELESS ACTUATOR - A wireless actuator has a structure in which movement of a movable table ( | 02-11-2010 |
| 20100024587 | XY TABLE ACTUATOR - Provided is an XY table actuator that, while building-in a drive means for freely moving an object placed on a table within an XY-plane and positioning the object, can be significantly reduced in size and that helps to suppress an increase in table height. The actuator has: a stationary plate ( | 02-04-2010 |
| 20090322265 | AC MOTOR DRIVING APPARATUS AND CONTROL METHOD - Provided is an AC motor driving apparatus and an AC motor control method capable of utilizing the conventional PWM system as-is even in an ultra-compact AC motor having an extremely few turns of exciting coil and preventing occurring of vibration and noise. | 12-31-2009 |
| 20090309529 | POWER BRANCHING SYSTEM AND POWER BRANCHING METHOD - Provided is a power branching system for driving a plurality of motors by use of a single servo driver, the power branching system capable of protecting each of the motors. | 12-17-2009 |
| 20090307888 | JIG FOR DRIVING CLOSING CAP FOR BOLT INSTALLATION HOLE - Provided is a driving jig for a closing cap which makes it possible to drive a closing cap straight into a bolt installation hole ( | 12-17-2009 |
| 20090304312 | MOTION GUIDE DEVICE AND ATTACHMENT FOR MOTION GUIDE DEVICE - Provided is a motion guide device having a lubricating path usable for both of grease lubrication and oil lubrication. | 12-10-2009 |
| 20090301246 | SCREW DEVICE AND METHOD OF MANUFACTURING THE SAME - The present invention provides a screw device which takes a heavy load in one direction along the axis of the screw shaft and only a light load in the opposite direction, the screw device capable of providing ease of control of preloading. | 12-10-2009 |
| 20090293658 | LOW-NOISE SCREW DEVICE - Provided is a screw device capable of reducing noise generated therefrom. | 12-03-2009 |
| 20090288511 | ELECTRIC LINEAR ACTUATOR - Provided is an electric linear actuator advantageous in downsizing and weight reduction. The electric linear actuator includes: a housing; a motor held by the housing; a nut member rotatably held with respect to the housing; a screw shaft threadedly engaged with the nut member; a drive shaft directly coupled with the motor; a rotation transmitting member rotatably supported about the drive shaft; a rotary driven member fixed to the nut member and rotated in accordance with the rotation transmitting member; a clutch member to which rotation of the drive shaft is transmitted, and which is provided so as to freely advance and retract in an axial direction of the drive shaft, and in which meshing with the rotation transmitting member is effected at an engagement position, and meshing with the rotation transmitting member is cancelled at a retraction position; and a setting lever capable of setting the clutch member to one of the advance position and the retraction position. | 11-26-2009 |
| 20090282940 | ROLLING ELEMENT SCREW DEVICE - A rolling element screw device is provided with a power transmission mechanism for moving a retainer ring | 11-19-2009 |
| 20090279820 | SPHERICAL BEARING AND PROCESS FOR MANUFACTURING THE SAME - Provided are a spherical bearing in which a ball portion ( | 11-12-2009 |
| 20090278412 | LINEAR MOTOR ACTUATOR - Provided is a linear motor actuator which generates a sufficient thrust force and a retaining force and is remarkably smaller than conventional linear motor actuators. The linear motor actuator includes a base member ( | 11-12-2009 |
| 20090261663 | LINEAR MOTOR AND METHOD OF MANUFACTURING THE SAME - Provided is a linear motor capable of simplifying assembling of a coil unit and stabilizing a coil pitch and the overall length of the coil unit. | 10-22-2009 |
| 20090260468 | STEERING DEVICE AND MOVEMENT CONVERTING DEVICE USED THEREFOR - Provided is a novel steering device which can be formed to be compact, which is easily applicable to a vehicle with a small engine room such as a front-engine/front-drive car, and which is of neither the ball nut type nor the rack and pinion type. The steering device operates steerable wheels by converting rotation of a steering shaft to axial movement of a relay rod, the steering device including: a gear casing through which the relay rod is passed; a spiral ball rolling groove provided in the relay rod within the gear casing so as to exhibit a lead of a magnitude of 1 or more; a nut member threadedly engaged with the ball rolling groove of the relay rod through an intermediation of a large number of balls and supported rotatably with respect to the gear casing; an input shaft to which rotation of the steering shaft is transmitted and which is in an intersecting or offset relationship with the relay rod; and a first transmission gear for transmitting rotation of the input shaft to the nut member. | 10-22-2009 |
| 20090252442 | MOTION GUIDE DEVICE AND METHOD OF LUBRICATING THE SAME - A motion guide device is provided, which is able to not only lubricate rolling-element rolling surfaces with the use of a technique totally different from conventional lubricating techniques but also maintain a lubricating capability over a long period of time. The motion guide device for use in the vacuum environment a track member ( | 10-08-2009 |
| 20090249912 | ROLLER SCREW - The present invention provides a roller screw capable of circulating rollers smoothly. | 10-08-2009 |
| 20090249911 | SCREW DEVICE - The present invention provides a screw device enabling insulation of sounds occurring from the inside of the screw device when circulating rolling elements. | 10-08-2009 |
| 20090218894 | LINEAR MOTOR - A compact linear motor is provided which is able to limit a rod, which linearly moves relatively to coils, from revolving. | 09-03-2009 |
| 20090205425 | STATE DETECTION DEVICE, STATE DETECTION METHOD, STATE DETECTION PROGRAM, AND INFORMATION RECORDING MEDIUM - A state detecting apparatus S for detecting a current operating state of an LM (linear motion) system includes an AE sensor | 08-20-2009 |
| 20090185765 | LINEAR GUIDANCE DEVICE - Provided is a linear guidance device in which a track groove ( | 07-23-2009 |
| 20090169139 | MOTION GUIDE DEVICE AND METHOD OF ASSEMBLING MOTION GUIDE DEVICE - A motion guide device is provided which is able to damp the moving block from vibrating in a direction perpendicular to an axis of the raceway rail. | 07-02-2009 |
| 20090161996 | MOTION GUIDE DEVICE, TABLE APPARATUS, AND DAMPING METHOD FOR MOTION GUIDE DEVICE - A motion guide device that has a novel damping structure different from the conventional damping structure is provided. The present invention comprises a raceway member ( | 06-25-2009 |
| 20090154850 | MOTION GUIDE DEVICE, RELATIVE MOTION SYSTEM AND DISPLACEMENT ABSORBING MECHANISM - Provided is a motion guide device having a low rigidity in the vertical direction and a low rigidity in the horizontal direction. | 06-18-2009 |
| 20090154849 | MOTION GUIDE DEVICE - Provided is a motion guide device having a scooping portion that is not damaged even when a moving member is moved at high speed. | 06-18-2009 |
| 20090152960 | MICRO ACTUATOR - Disclosed is a micro actuator capable of being formed in compact as a whole, such as 10 mm in diameter by diminishing a difference between a stroke distance of a moving member and an overall length, and by reducing a sectional area taken in a direction orthogonal to a stroke direction. The micro actuator includes: a spline shaft formed as a cylinder with a hollow part and having an axially extending slit opening; a spline nut fit-engaged with the spline shaft and axially guiding the spline shaft; a pair of end caps fixed to openings at both ends of the spline shaft; a magnet rod supported at both ends within the hollow part of the spline shaft by the end caps; and a forcer loosely fit-engaged with a periphery of the magnet rod within the hollow part of the spline shaft to constitute a linear motor together with the magnet rod and connected with the spline nut through the slit opening. | 06-18-2009 |
| 20090151493 | ROLLING-ELEMENT SCREW DEVICE AND METHOD OF ASSEMBLING THE SAME - The present invention provides a rolling-element screw device capable of offering advantages of both an end cap type ball screw and a return pipe type ball screw and belonging to an intermediate new category between these ball screws. | 06-18-2009 |
| 20090149855 | POWER ASSIST CONTROL METHOD, POWER ASSIST CONTROL APPARATUS, AND REDUCTION APPARATUS - Power assist control capable of responding to feeling and sensibility when a man applies force to an object is performed. The power assist control outputs an assist force F or a speed F on the basis of an assist target force X detected by a force sensor | 06-11-2009 |
| 20090148083 | MOVEMENT GUIDING DEVICE FOR VACUUM ENVIRONMENT - A movement guiding device for a vacuum environment is provided so that the device is able to suppress a base oil vaporized in the vacuum environment from leaking to the outside. The movement guiding device for a vacuum environment according to the present invention comprises a track member ( | 06-11-2009 |
| 20090146507 | Linear Motor Actuator - A linear motor actuator includes a raceway member | 06-11-2009 |
| 20090127939 | LINEAR SYNCHRONOUS MOTOR AND LINEAR MOTOR ACTUATOR - Provided is a linear synchronous motor in which, when a three-phase alternating current passes through a coil of a mover, thrust forces generated by the alternating currents of each phase are equalized, thereby making it possible to minimize variation in thrust force, the linear synchronous motor including: a stator magnet ( | 05-21-2009 |
| 20090123096 | ROLLING GUIDE DEVICE AND METHOD OF MANUFACTURING THE SAME - Provided is a rolling guide device which can be produced easily and inexpensively by achieving a reduction in the number of parts constituting a slide member ( | 05-14-2009 |
| 20090100949 | MOTION GUIDE APPARATUS - A linear guide device ( | 04-23-2009 |
| 20090095099 | SPEED CHANGE MECHANISM AND ROTARY ACTUATOR - A rotary actuator | 04-16-2009 |
| 20090084212 | SCREW DEVICE AND METHOD OF MANUFACTURING THE SAME - Provided is a screw device capable of preventing occurrence of any elevation change at a joint between a ball return path of a circulation member and a loaded ball rolling groove of a nut. | 04-02-2009 |
| 20090070078 | ROLLER SCREW AND METHOD OF DESIGNING UNLOADED ROLLER RETURN PATH THEREOF - Provided is a roller screw having an unloaded roller return path of new shape capable of moving rollers smoothly. | 03-12-2009 |
| 20090064811 | BALL SCREW DEVICE - Provided is a ball screw device capable of downsizing a nut member ( | 03-12-2009 |
| 20090060645 | FIXING STRUCTURE OF TRACK RAIL IN GUIDING APPARATUS - Provided is a fixing structure of a track rail, which is capable of fixing the track rail to a base portion without using a fixing bolt, in a case of fixing a guiding apparatus composed of the track rail and a slider to the base portion, and particularly suitable for an extremely small-sized guiding apparatus in which it is difficult to process a tap hole. A structure for fixing a track rail ( | 03-05-2009 |
| 20090049938 | Electric Actuator - An electric actuator is provided with a power transmission mechanism capable of converting a rotating driving power supplied from an electric motor to a reciprocating motion. This power transmission mechanism is provided with a cylindrical member formed, in its inner peripheral surface, with at least one row of rolling member rolling groove, a nut member disposed to be reciprocally through the rolling members endlessly circulating in the inner peripheral surface of the cylindrical member, and a cylinder rod operatively connected to an end portion of the nut member to be axially movable with respect to the cylindrical member. The reciprocating motion of the nut member in the axial direction is guided by the circular cylindrical member. According to such structure, high output and high controllability can be realized, as well as realizing of a compact electric actuator of a size similar to a conventional hydraulic cylinder. | 02-26-2009 |
| 20090047063 | BALL JOINT - Provided is a ball joint which enhances a sealing performance between a boot seal ( | 02-19-2009 |
| 20090045711 | THIN SLIDE UNIT - Provided is a thin slide unit which allows, in a case where two ball plates each formed with a track-like ball groove are combined to thereby construct an endless circulation path for balls, by merely directly connecting the two ball plates without using a guide plate, balls to smoothly circulate, and a slider to smoothly reciprocate with respect to a guide rail. An endless circulation path for the balls of the slider is formed such that the two ball plates each formed with the track-like ball groove are caused to face each other, and that the ball plates are directly connected. Peripheral sides of the two ball plates oppose to each other, to thereby form a load opening portion for causing the balls in the endless circulation path to contact a rolling groove of the guide rail, and form a scooping-up portion for raising the balls from the rolling groove to guide the balls into the endless circulation path. | 02-19-2009 |
| 20090010577 | Structure for Closing a Rail Mounting Hole - The present invention provides a structure for closing a track rail mounting hole, which prevents a closing cap from being press-fitted with an inclined state into the rail mounting hole, thereby being capable of positively preventing formation of a gap between the rail mounting hole and the closing cap. The closing cap ( | 01-08-2009 |
| 20090001837 | Hollow Motor Drive Device - A hollow motor drive device includes a screw shaft provided with a spiral screw groove formed in an outer peripheral surface thereof, a nut member screw-engaged with the screw groove, a hollow drive shaft having an inner peripheral side on which the nut member is fixed and an outer peripheral side on which a permanent magnet is disposed, and a housing provided with a bearing portion rotatably supporting the hollow drive shaft and a coil portion. In the hollow drive shaft, the nut member and the permanent magnet are disposed so as not to be overlapped with each other in a direction perpendicular to the axial direction of the hollow drive shaft, and in the housing, the bearing portion is disposed to a position corresponding to the nut member, and the coil portion is disposed to a position corresponding to the permanent magnet. | 01-01-2009 |
| 20080303356 | Rod-Type Linear Motor - By reviewing a material of a forcer housing and an assembly structure of a coil member with respect to the forcer housing, a thrust force is increased, an optimum shape can be easily given to the forcer housing depending on a purpose of use, and a linear motor can be manufactured at low cost. The linear motor includes a magnet rod composed of a large number of magnetic poles arranged with predetermined pitches along an axial direction and a forcer having a through-hole into which the magnet rod is loosely inserted and reciprocatable relatively to the magnet rod according to an applied electric signal. The forcer is composed of a forcer housing in which the through-hole is defined and a coil member which is arranged on an inner peripheral surface of the through-hole of the forcer housing and to which the electric signal is applied. The forcer housing is formed by mold forming with an insulating nonmetal inorganic material. | 12-11-2008 |
| 20080253703 | Method of Manufacturing Linear Guide Device and Track Rail For the Linear Guide Device - Provided are a linear guide device and a method of manufacturing a track rail of the linear guide device which make it unnecessary to finish rolling contact surfaces for rolling bodies for the purpose of ensuring parallelism between the rolling contact surfaces after fixing a plurality of rail members, in which the rolling contact surfaces for the rolling bodies are formed, to a rail housing while making it possible to achieve a maximum possible improvement in production efficiency and a reduction in production cost in producing the track rail. The track rail is composed of a pair of the rail members in which rolling contact surfaces for rolling bodies are formed, respectively, and the rail housing equipped with a pair of rail mounting grooves in which those rail members are fitted, respectively. Each of the rail members is fixed within a corresponding one of the rail mounting grooves via an adhesive layer. A reference projection, formed on a bottom of one of the pair of the rail mounting grooves, is in contact with a corresponding one of the rail members without the intermediary of the adhesive layer. The rail member fitted in the one of the rail mounting grooves is adhesively fixed in a state of being abutted against the reference projection. The rail member fitted in the other rail mounting groove is adhesively fixed at a predetermined distance from the reference projection. | 10-16-2008 |
| 20080246349 | Drive guide apparatus - The present invention provides a drive guide apparatus capable of ensuring an increased lifetime by preventing heat generated from a primary side of a linear motor from being transferred to a rail or a moving member of a guide mechanism to which the primary side of the linear motor is connected, thereby preventing variation of rolling resistance or sliding resistance of the guide mechanism. The drive guide apparatus has a linear motor and a guide mechanism that has a rail and a moving member provided to be movable relative to the rail. A primary side of the linear motor is connected to the rail. Thermal insulators for blocking heat generated from the primary side of the linear motor are provided between the primary side and the rail of the guide mechanism to which the primary side is connected directly or indirectly. | 10-09-2008 |
| 20080245170 | Roller Screw - A roller screw is provided having a structure suitable for circulating rollers. The roller screw has a screw shaft | 10-09-2008 |
| 20080217828 | Xy Guide Table - Provided is an XY guide table in which rigidity of portions thereof where ball rolling surfaces are formed is enhanced to thereby eliminate clearances between balls and ball rolling grooves making it possible to guide an upper plate in an X-direction and Y-direction with respect to a lower plate without involving any rattling, and which can be formed in a very thin shape. The XY guide table includes the lower plate, an intermediate plate, and the upper plate assembled with each other through intermediation of the balls. Each of the lower plate and the upper plate has a pair of rail bodies of a substantially rectangular sectional configuration and a storage groove sandwiched between the rail bodies, and is formed in a substantially channel-like configuration. The ball rolling groove is formed in a side surface of each rail body facing the storage groove. The plates are stacked together, with the storage grooves being opposed and orthogonal to each other. The intermediate plate is formed in a substantially rectangular configuration, and has the lower half thereof loosely fitted into the storage groove of the lower plate and the upper half thereof loosely fitted into the storage groove of the upper plate. | 09-11-2008 |
| 20080212905 | Motion Guide Device - A motion guide device having a novel scoop section structure whose scoop section is not likely to break even if a movement member is moved at high speed. A scoop section ( | 09-04-2008 |
