Spindle motor with an improved hub

Details Spindle motor with an improved hub Spindle motor with an improved hub

1991-10-21

1993-06-01

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 88, 360 9808, G11B 1714, H02K 714, H02K 510

Patent

active

052163040

ABSTRACT:
A spindle motor has a stationary member, a hub rotatable relative to the hub, a stator mounted on the stationary member and a rotor magnet carried by the hub and facing the stator. The hub is provided with female-threaded holes for receiving screws for fixing a disk clamp member to the hub, and also with communication holes communicating with the female-threaded holes and opening to the exterior of the hub. The hub further has a seal member for sealing the openings of the communication holes. The hub is rotatably supported by the shaft member through a pair of bearings. The stator has a stator stack of a stack height or thickness greater than the spacing of the pair of bearings.

REFERENCES:
patent: 4088001 (1978-05-01), Ishikawa et al.
patent: 4734606 (1988-03-01), Hajec
patent: 4739425 (1988-04-01), Dierkes et al.
patent: 4739427 (1988-04-01), Kilmer et al.
patent: 4967465 (1990-11-01), Frank
patent: 5031061 (1991-07-01), Hatch
patent: 5092144 (1992-03-01), Fleming et al.
patent: 5097164 (1992-03-01), Nakasugi et al.

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