Fluid dynamic bearing motor design for mounting a rotating shaft

Details Fluid dynamic bearing motor design for mounting a rotating shaft Fluid dynamic bearing motor design for mounting a rotating shaft

1998-06-30

2000-09-19

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 384112, 384123, 384121, H02H 700, F16C 3200

Patent

active

061217034

ABSTRACT:
A fluid dynamic bearing 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: 3870382 (1975-03-01), Reinhoudt
patent: 5559382 (1996-09-01), Oku et al.
patent: 5577842 (1996-11-01), Parsoneault et al.
patent: 5653540 (1997-08-01), Heine et al.
patent: 5666716 (1997-09-01), Parsoneault et al.
patent: 5678929 (1997-10-01), Parsoneault et al.
patent: 5795074 (1998-08-01), Rahman et al.

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