Spindle motor with bearing system having fluid sealing and leaka

Details Spindle motor with bearing system having fluid sealing and leaka Spindle motor with bearing system having fluid sealing and leaka

1997-10-08

1999-03-09

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 384100, 384112, 384114, 384107, 360 9807, 360 9904, 360 9908, 277 53, 277 57, H02K 708, F16C 1710, G11B 1702

Patent

active

058805451

ABSTRACT:
The invention is a spindle motor including a rotor hub bearing a rotational load, lubricant-containing bearing systems rotatably supported by the rotor hub, and stator windings wound on a stationary member, so as to oppose the rotor magnet. At least a portion of the rotor hub is in a clean environment, with the motor substantially sealed by a sealing unit. The spindle motor has a leakage prevention unit which prevents the lubricant trying to leak out the bearing systems and out the motor, when centrifugal forces produced by a rotor hub rotating at a high speed are exerted on the lubricant.

REFERENCES:
patent: 4458957 (1984-07-01), Greener
patent: 4922406 (1990-05-01), Schuh
patent: 4996613 (1991-02-01), Hishida
patent: 5347189 (1994-09-01), Chuta et al.
patent: 5503407 (1996-04-01), McNickle
patent: 5596235 (1997-01-01), Yazaki et al.
patent: 5663602 (1997-09-01), Shimizu et al.
patent: 5770906 (1998-06-01), Hazelton et al.

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