Fluid dynamic bearing cartridge design incorporating a rotating

Details Fluid dynamic bearing cartridge design incorporating a rotating Fluid dynamic bearing cartridge design incorporating a rotating

1998-06-30

1999-12-21

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384112, F16C 3206

Patent

active

06004036&

ABSTRACT:
A fluid dynamic bearing cartridge including a sleeve and a counterplate captured within a shoulder on the sleeve and including a threaded mounting extension for mounting the assembly from a base or the like. A rotating shaft is incorporated within the sleeve; the shaft includes a thrust plate which rotates in a recess defined between the counterplate and the sleeve. To incorporate this assembly into a disc drive or the like, the threaded mounting extension only needs to be mounted within a base, with a nut screwed over the threaded mounting. The base typically includes a raised portion; the sleeve is cantilevered from this base for further stability and eliminate the possibility of vibration of the shaft and sleeve with rotation of the shaft. The end of the shaft distal from the threaded mounting supports a hub which in turn supports a backiron and magnet. The base supports a stator aligned with the magnet; energization of the stator will cause rotation of the hub and the shaft.

REFERENCES:
patent: 4557610 (1985-12-01), Asada et al.
patent: 4573807 (1986-03-01), Asada et al.
patent: 5357163 (1994-10-01), Minakuchi et al.
patent: 5417507 (1995-05-01), Uno et al.
patent: 5559382 (1996-09-01), Oku et al.
patent: 5675200 (1997-10-01), Hayashi

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