Patent application number | Description | Published |
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 |
20130155548 | RECORDING DISK DRIVING DEVICE - There is provided a recording disk driving device including a rotor including a rotor hub on which at least one disk is installed, a stator for rotatably supporting the rotor, and a housing including a base member on which the stator is fixedly installed, and an upper case coupled to the base member to form an internal space, wherein the housing is provided with a contact preventing portion formed on a surface of the housing, facing the disk. | 06-20-2013 |
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 |
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 |
20130257216 | STATOR CORE ASSEMBLY AND SPINDLE MOTOR INCLUDING THE SAME - There is provided a stator core assembly including: a body having a circular ring shape; a teeth part including a plurality of teeth extended from the body; and a plurality of coils wound around the plurality of teeth, wherein the coils are wound n+3 | 10-03-2013 |
20130322792 | 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 including a shaft hole to have a shaft rotatably installed therein; and a cover member covering the shaft hole at a lower portion of the shaft hole in an axial direction, wherein an inner surface of the sleeve is provided with depression parts depressed in an outer diameter direction between upper and lower portions of the sleeve and portions in which radial bearings are formed, such that the portions in which the radial bearings are formed are provided with bearing closure adhesion parts allowing the portions in which the radial bearings are formed to be closer to the shaft than portions other than the portions in which the radial bearings are formed. | 12-05-2013 |
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 |
20140175913 | SPINDLE MOTOR - A spindle motor includes a stator including a base member having a stator core installed thereon; and a rotor including a rotor hub in which a driving magnet facing the stator core is installed. The rotor hub includes a disk-shaped body, a magnet mounting part extended from edge of the body in a downward axial direction and having the driving magnet installed on an inner surface thereof, and a disk support part extended from the magnet mounting part in radial direction. A magnetic center of the driving magnet is higher than that of the stator core in the axial direction in order to generate force directed in the downward axial direction through interaction with the stator core. The magnet mounting part includes a vortex generation suppressing part disposed on a lower edge portion thereof to decrease noise and vibrations generated by flow of air during rotation of the rotor hub. | 06-26-2014 |
20140175928 | SPINDLE MOTOR - There is provided a spindle motor including a stator including a base member in which a stator core is fixedly installed, and a rotor including a rotor hub in which a driving magnet disposed to face the stator core is installed, wherein the driving magnet is installed on a magnet mounting part provided in the rotor hub so that the magnetic center thereof in an axial direction is disposed in a position higher than that of the magnetic center of the stator core in the axial direction in order to generate force directed in a downward axial direction by interaction with the stator core, and the stator core is formed of a soft magnetic material and includes protrusion parts formed at a front end portion thereof disposed to face the driving magnet and extended therefrom in the axial direction. | 06-26-2014 |