| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 310156040 | Separate portion of the rotor magnet used as a thrust bearing | 14 |
| 20090009020 | MOTOR HAVING SUCTION RING - A suction ring is fixed to a motor base and is provided with an outer circumferential section having a first outer diameter that is smaller than an inner diameter of a wall section of the motor base. A plurality of protruded sections each have a second outer diameter larger than the inner diameter of the wall section of the motor base and protrudes outward in a radial direction from the outer circumferential section of the suction ring. The plurality of protruded sections of the suction ring are press fitted into a wall section of the motor base and secures the suction ring to the motor base. One surface of the suction ring coincides with a bottom surface of the ring magnet covering a whole range of a projected area of the ring magnet that is projected onto the surface of the suction ring. | 01-08-2009 |
| 20090051240 | Permanent magnetic motor having a magnetic axial bearing - A permanent magnetic motor having a magnetic axial bearing and one or more fluid bearings, wherein a stator unit is disposed on a baseplate, the stator unit being disposed opposite a magnet ring made up of permanent magnets and being separated from the magnet ring by an air gap, and the magnet ring is fixed to the inside circumference of a circumferential hub that is supported with respect to a bearing bush by means of the fluid bearings via a shaft, and at least one fluid dynamic axial bearing is preloaded with an axial attractive force component that is at least partly generated by a ferromagnetic pull ring that is fixed to the baseplate and disposed below the magnet ring and permeated by its field lines, characterized in that, seen magnetically, the stator unit is centered with respect to the magnet ring and has no significant axial offset and that the pull ring has no or only relatively low electrical conductivity at high magnetic permeability. | 02-26-2009 |
| 20090174272 | MOTOR AND DISK DRIVE USING THE SAME - A thrust yoke is fixed into a second recessed portion of a base with adhesive. The second recessed portion has a first surface to be in contact with the bottom surface of the thrust yoke, and a second surface axially opposing the bottom surface of the thrust yoke with a gap therebetween. The thrust yoke has a bent portion at its radial end. The bent portion is bent downward. The thrust yoke also has a protruding portion extending downward from the bent portion. The protruding portion axially opposes the second surface of the second recessed portion of the base with a gap therebetween. | 07-09-2009 |
| 20110006629 | MOTOR - A motor including a rotor and a stator that supports and rotates the rotor is disclosed. In accordance with an embodiment of the present invention, the motor includes a magnetic member, which is installed in the rotor such that the magnetic member faces the stator, and a stator magnetic body, which is a part of the stator and has a part corresponding to the magnetic member formed asymmetrically therein. In this way, the motor can prevent a whirling effect by installing the magnetic member, which forms a preload, even the motor is thinner. | 01-13-2011 |
| 20120139376 | Brushless motor - In a brushless motor comprising: a stator S having a stator core | 06-07-2012 |
| 20130076186 | SPINDLE MOTOR - 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, fixedly coupled to the base, 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 stator further includes a pulling plate disposed to face the magnet in an axial direction of a shaft, coupled to the base, and protruded upwardly toward the core in a axial direction of a shaft. | 03-28-2013 |
| 20130106224 | BASE ASSEMBLY FOR MOTOR AND FAN MOTOR INCLUDING THE SAME | 05-02-2013 |
| 20130106225 | SPINDLE MOTOR | 05-02-2013 |
| 20130113321 | BASE ASSEMBLY FOR MOTOR AND SPINDLE MOTOR INCLUDING THE SAME - There is provided a base assembly for a motor, the base assembly including: a base supporting rotation of a rotating member of the motor; and a pulling plate provided to the base to thereby prevent excessive floating of the rotating member, wherein the pulling plate includes a body part not in contact with the base and an extension part extended from the body part to thereby contact the base. | 05-09-2013 |
| 20130113322 | ELECTROMAGNETIC MODULE AND SPINDLE MOTOR HAVING THE SAME - Disclosed herein are an electromagnetic module for a spindle motor including a shaft and a spindle motor having the same. The electromagnetic module includes: an armature including a core and a coil wound around the core; and a magnet facing the armature, wherein the magnet is provided with a protrusion part disposed over the core. The spindle motor includes: a rotor part including a shaft, a hub, and a magnet; a stator part including a sleeve rotatably supporting the shaft, a base having the sleeve coupled thereto, and an armature facing the magnet, fixedly coupled to the base, and including a core and a coil; and a fluid dynamic bearing part formed between the rotor part and the stator part by being filled with oil, wherein the magnet is provided with a protrusion part disposed over the core. | 05-09-2013 |
| 20130127281 | PULLING PLATE FOR SPINDLE MOTOR AND SPINDLE MOTOR HAVING THE SAME - There is provided a pulling plate for a spindle motor, the pulling plate including: a body having a circular ring shape; and a plastic deformation part protruding upwardly from the body and plastically deformed when being mounted. Since the pulling plate is installed in the base member by deforming the plating deformation part, a coupling strength between the pulling plate and the base member may be improved. In addition, since the pulling plate may be installed in the base member only through the deformation of the plastic deformation part, an amount of deformation may be reduced. Further, contamination generated in the case that the puling plate clips the base member may be reduced as compared to a case in which the entire pulling plate is press-fitted into the base member. | 05-23-2013 |
| 20130147300 | SPINDLE MOTOR - Disclosed herein is a spindle motor. The spindle motor includes a main magnet formed to have an asymmetrical cross section without a pulling magnet according to the prior art that has been installed on an upper end of a core in order to prevent floating of a rotor, such that the main magnet may prevent the floating of the rotor instead of the pulling magnet. | 06-13-2013 |
| 20130193794 | SPINDLE MOTOR - Disclosed herein is a spindle motor in which the center of a main magnet configuring a rotor is positioned at a position higher than that of the center of a core configuring an armature, such that magnetic force generated in the main magnet acts downwardly, thereby easily preventing the floating of the rotor. | 08-01-2013 |
| 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 |
