Spindle motor

Details Spindle motor Spindle motor

1992-03-05

1993-07-13

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 42, 360 9908, H02K 516, G11B 1702

Patent

active

052276864

ABSTRACT:
A spindle motor includes a shaft, a hub assembly unit rotatable relative to the shaft, an upper bearing structure and a lower bearing structure both interposed between the shaft and the hub assembly unit, and a stator disposed between the upper and lower bearing structures. The stator, the hub assembly unit, and the upper and lower bearing structures are attached to a specific side of the shaft. The hub assembly unit has an aluminum-made hub and an iron-made yoke, both of which are joined together through a pair of fixing portions. One fixing portion has a relatively strong fitting force, whereas the other fixing portion has a relatively weak fitting force.

REFERENCES:
patent: 4717977 (1988-01-01), Brown
patent: 4905110 (1990-02-01), Krum et al.
patent: 4928029 (1990-05-01), Wright
patent: 5061868 (1991-10-01), Iwazaki et al.

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