Disk drive motor with labyrinth seal

Details Disk drive motor with labyrinth seal Disk drive motor with labyrinth seal

1995-08-15

1996-12-31

Hannon, Thomas R.

Bearings

Rotary bearing

Antifriction bearing

384480, F16C 3380

Patent

active

055887538

ABSTRACT:
A disk drive motor having a center shaft, a pair of ball bearings inner rings thereof being fixedly fitted with the center shaft while interposing a predetermined distance therebetween, a hub being supported so as to be rotatable about the center shaft while having outer rings of the ball bearings fixed to an inner hole thereof, a drive magnet integrally rotating the hub, a stator core being arranged so as to confront the drive magnet, and a first seal means and a second seal means being respectively arranged along ways to a space outside the motor to constitute seal mechanisms while communicating the respective ball bearings with the space outside the motor, wherein an annular spacer is fixedly fitted with the center shaft between the inner rings of the pair of ball bearings and an outer circumferential surface of the spacer confronts an inner circumferential surface of the inner hole of the hub while interposing a small gap therebetween, so that a labyrinth seal mechanism is formed.

REFERENCES:
patent: 3109066 (1962-01-01), Decker
patent: 3978801 (1976-09-01), Forte
patent: 4898480 (1990-02-01), Raj et al.

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