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US 8,552,606 B1Granted
Spindle motor
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsShin Young Cheong, Hyun Chul Lee
Life of this patent
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Abstract
There is provided a spindle motor including: a shaft; a first sleeve rotatably supporting the shaft by fluid dynamic pressure; a second sleeve provided outwardly of the first sleeve; a stator core mounted on an outer surface of the second sleeve; and a base member including a mounting part protruding upwardly in an axial direction and fixed to at least one of the first and second sleeves.
Claims10
A spindle motor comprising:
- a shaft;
- a first sleeve rotatably supporting the shaft by fluid dynamic pressure;
- a second sleeve provided outwardly of the first sleeve;
- a stator core mounted on an outer surface of the second sleeve;
- and
- a base member including a mounting part protruding upwardly in an axial direction and fixed to at least one of the first and second sleeves,
- wherein a hub is coupled to the upper end of the shaft, a thrust dynamic pressure bearing is formed between the hub and a surface of the first sleeve facing the hub, and a radial dynamic pressure bearing is formed between the shaft and a surface of the first sleeve facing the shaft,
- the hub includes a main wall portion extended downwardly in the axial direction, the main wall portion is extended between the first sleeve and the second sleeve, and a lower surface of the main wall portion is positioned below an upper surface of the first sleeve and the second sleeve, and
- the second sleeve is provided with a core seating part protruding outwardly in the radial direction and at least a part of an upper surface of the stator core is seated on the core seating part.
6 more elements
Dependencies are inferred from the claim text.