Spindle motor with precision bearings

Details Spindle motor with precision bearings Spindle motor with precision bearings

1989-06-05

1990-12-25

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 384551, 384585, H02K 516, F16C 35067

Patent

active

049805878

ABSTRACT:
A spindle motor comprises a central shaft, a hub rotatable about the shaft and having a central bore which is open at one end, a first bearing fitted in the bore to surround the shaft, a second bearing disposed within the bore to surround the shaft and axially spaced from the first bearing to be positioned closer to the open end of the bore, and an auxiliary bush fitted in the bore to fittingly receive the second bearing. The bush has an inward flange axially interposed between the first and second bearings. The flange provides a first surface in face-to-face contact with an outer race of the first bearing. The flange further provides a second surface parallel to the first surface and in face-to-face contact with an outer race of the second bearing.

REFERENCES:
patent: 2804359 (1957-08-01), Chauvel
patent: 4480881 (1984-11-01), Fujimori
patent: 4519010 (1985-05-01), Elsaesser
patent: 4607182 (1986-08-01), Ballhaus
patent: 4612468 (1986-09-01), Sturm et al.
patent: 4752847 (1988-06-01), Harris
patent: 4900958 (1990-02-01), Kitahara et al.

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