Bearing mechanism for spindle motor in magnetic disk drive

Details Bearing mechanism for spindle motor in magnetic disk drive Bearing mechanism for spindle motor in magnetic disk drive

2005-12-19

2008-10-28

Hannon, Thomas R (Department: 3682)

Bearings

Rotary bearing

Antifriction bearing

C384S526000, C360S099080

Reexamination Certificate

active

07441959

ABSTRACT:
Embodiments of the invention prevent trouble caused by an increase in viscosity of grease generated when a ball bearing operates at a low temperature, and fretting that an inner ring and/or an outer ring comes in contact with balls to produce wear when vibration is applied thereto. In one embodiment, a ball bearing is configured such that a plurality of balls are arranged between an outer ring and an inner ring. Grease is filled between the balls, the inner ring and the outer ring. A holder is provided with a spring plate, and an extreme end thereof is always in contact with the balls. The spring plate is formed of a sufficiently softer material than the balls so as not to damage the balls. The mounted direction is one along the direction in which the balls are desired to be rotated. Appropriate spring pressurization can be applied to the balls at an angle defined by the holder and the spring plate in the root at which the holder is attached to the spring plate.

REFERENCES:
patent: 3913993 (1975-10-01), Ernst
patent: 5667312 (1997-09-01), Grunze et al.
patent: 6302588 (2001-10-01), Brown
patent: 6394656 (2002-05-01), Williams
patent: 6435325 (2002-08-01), Miller et al.
patent: 2000-105983 (2000-04-01), None

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