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US 7,608,957 B2Granted
Spindle motor with oil impregnated bearings and a shaft with a groove
AssigneeLG Innotek Co., Ltd.
InventorGi Seok Yun
Life of this patent
Estimating the term…
Abstract
A spindle motor can include a base, a bearing housing supported by the base, a bearing installed in the bearing housing, where oil is impregnated in the bearing, a rotating shaft rotatably installed in the bearing and having a groove at a predetermined surface thereof facing the bearing, a stator installed around the bearing housing and having a core and a coil, and a rotor fixed to the rotating shaft and having a rotor yoke and a magnet.
Claims20
A spindle motor comprising:
- a bearing housing;
- a bearing installed in the bearing housing, the bearing being formed with oil-impregnated pores;
- a rotating shaft rotatably installed in the oil-impregnated bearing and having a groove at a predetermined surface thereof facing the bearing;
- a stator installed around the bearing housing and having a core and a coil;
- and
- a rotor fixed to the rotating shaft and having a rotor yoke and a magnet,
- wherein oil leaving the oil-impregnated bearing is directly re-supplied to the bearing from the interfacial surface between the bearing and the rotating shaft.
4 more elements
A spindle motor comprising:
- a base;
- a bearing housing installed in the base;
- a bearing installed in the bearing housing, the bearing being formed with oil-impregnated pores;
- a rotating shaft rotatably installed in the oil-impregnated bearing and having a groove at a predetermined surface thereof facing the bearing;
- a stator installed around the bearing housing and having a core and a coil;
- and
- a rotor fixed to the rotating shaft and having a rotor yoke and a magnet,
- wherein the rotor yoke surrounds the stator in an outer radial direction and wherein a portion of the rotor yoke is on a same horizontal plane as the groove.
5 more elements
A spindle motor comprising:
- a base;
- a bearing housing installed in the base;
- a bearing installed in the bearing housing;
- a rotating shaft rotatably installed in the bearing and having a groove at a predetermined surface thereof facing the bearing;
- a stopper attached to an outer peripheral surface of the rotating shaft that protrudes upward from the bearing;
- a stator installed around the bearing housing and having a core and a coil;
- and
- a rotor fixed to the rotating shaft and having a rotor yoke and a magnet,
- wherein the rotor yoke surrounds the stator in an outer radial direction and wherein the stopper is disposed between the rotor yoke and the bearing.
6 more elements
Dependencies are inferred from the claim text.