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US 8,508,087 B2Granted
Mounting device for disk in spindle motor
AssigneeLG Innotek Co., Ltd.
InventorsJae Hyun Park, Jin Seung Yoo
Life of this patent
Estimating the term…
Abstract
A spindle motor including a base, a bearing housing supported on the base, a bearing provided within the bearing housing, a rotating shaft rotatably supported by the bearing, a stator including a core fixed to the bearing housing and coils wound around the core, a rotor including a rotor yoke fixed to the rotating shaft, and a first magnet installed on the rotor yoke facing the stator, a turntable positioned on the rotor yoke, rotating together with the rotating shaft, a center guide member coupled to the rotating shaft at an upper side of the turntable, an elastic member disposed between the turntable and the center guide member for elastically supporting the center guide member.
Claims20
A spindle motor comprising:
- a base;
- a bearing housing supported on the base;
- a bearing provided within the bearing housing;
- a rotating shaft rotatably supported by the bearing;
- a stator including a core fixed to the bearing housing and coils wound around the core;
- a rotor including a rotor yoke fixed to the rotating shaft, and a first magnet installed on the rotor yoke facing the stator;
- a turntable positioned on the rotor yoke, rotating together with the rotating shaft;
- and
- a center guide member coupled to the rotating shaft at an upper side of the turntable,
- wherein the center guide member comprises:
- a plate into which the rotating shaft is inserted, to be capable of rising and descending;
- a wall formed to extend upward from an outer circumference of the plate;
- and a band formed to extend downward from the wall,
- wherein a first portion of the plate adjacent to the rotating shaft is thicker than a second portion of the plate adjacent to the wall,
- wherein the turntable includes
- a first upper surface adjacent to the rotating shaft;
- a first wall directly connected to the first upper surface and perpendicular to the first upper surface;
- a second upper surface directly connected to the first wall and perpendicular to the first wall;
- and
- a second wall directly connected to the second upper surface and extended upward.
17 more elements
A spindle motor comprising:
- a base;
- a bearing housing supported on the base;
- a bearing provided within the bearing housing;
- a rotating shaft rotatably supported by the bearing;
- a stator including a core fixed to the bearing housing and coils wound around the core;
- a rotor including a rotor yoke fixed to the rotating shaft, and a first magnet installed on the rotor yoke facing the stator;
- a turntable positioned on the rotor yoke, rotating together with the rotating shaft;
- a center guide member directly coupled to the rotating shaft at an upper side of the turntable;
- a back yoke fixed on the rotating shaft at an upper side of the center guide member, for preventing a disengaging of the center guide member from the rotating shaft;
- and
- a second magnet coupled to the back yoke,
- wherein a lower surface of the second magnet is partially contacted with an upper surface of the back yoke,
- wherein an upper surface of the back yoke includes a recess, wherein the recess faces a lower surface of the second magnet,
- wherein the center guide member includes:
- a plate into which the rotating shaft is inserted, to be capable of rising and descending;
- a wall formed to extend upward from an outer circumference of the plate to form a first recess to receive the back yoke;
- and
- a band formed to extend downward from the wall and progressively extended farther from a center of the rotating shaft in a downward direction,
- wherein the plate includes a second recess on an upper surface thereof,
- wherein the inner diameter of the second recess is spaced from the rotating shaft.
17 more elements
A spindle motor comprising:
- a base;
- a bearing housing supported on the base;
- a bearing provided within the bearing housing;
- a rotating shaft rotatably supported by the bearing;
- a stator including a core fixed to the bearing housing and coils wound around the core;
- a rotor including a rotor yoke fixed to the rotating shaft, and a first magnet installed on the rotor yoke facing the stator;
- a turntable positioned on the rotor yoke, rotating together with the rotating shaft;
- and
- a center guide member coupled to the rotating shaft at an upper side of the turntable,
- wherein the center guide member comprises:
- a plate into which the rotating shaft is inserted, to be capable of rising and descending;
- a wall formed to extend upward from an outer circumference of the plate;
- and
- a band formed to extend downward from the wall,
- wherein a first portion of the plate adjacent to the rotating shaft is thicker than a second portion of the plate adjacent to the wall,
- wherein an outer circumference surface of the first portion of the plate is closer to the rotating shaft than an outer circumference surface of a contact portion of the bearing housing,
- wherein the contact portion of the bearing housing is directly in contact with the core,
- wherein the turntable includes:
- an inner circumferential surface;
- an outer circumferential surface;
- and
- a disk supporting portion disposed at an upper portion of the outer circumferential surface and protruded outward in the radial direction,
- wherein the rotor yoke includes:
- a first portion coupled to the rotating shaft;
- a second portion connected to an upper portion of the first portion and extended outward in a radial direction;
- and
- a third portion connected to the second portion and extended downward in a vertical direction,
- wherein a vertical distance between a bottom surface of the first portion and a top surface of the second portion is greater than a vertical length of the inner circumference surface of the turntable.
25 more elements
Dependencies are inferred from the claim text.