Dynamic air pressure bearing

Details Dynamic air pressure bearing Dynamic air pressure bearing

1994-10-11

1996-07-09

Footland, Lenard A.

Bearings

Rotary bearing

Fluid bearing

384292, 384909, F16C 3320

Patent

active

055338135

ABSTRACT:
Disclosed is the improvement in a dynamic air pressure bearing in which a rotor is supported at high speed in the non-contact state. In an optical deflector, a stationary shaft is planted at the center portion of a housing. A stator core is disposed on a stud. A magnet yoke is integrated with a sleeve rotated relative to the stationary shaft. The magnet yoke contains an inner magnet and an outer magnet. A rotary polygonal mirror is mounted on a flange fixed on the sleeve by means of a center screw and a mirror cap. The rotary polygonal mirror is rotated at high speed together with the sleeve relative to the stationary shaft, thus constituting a dynamic air pressure bearing between the shaft and the sleeve. The stationary shaft is constituted of a main body and a ring-like bearing member fitted in the main body. The bearing member is formed of a ceramic material and formed with grooves for generating dynamic air pressure. The sleeve is preferably constituted of a main body and a bearing member of ceramic.

REFERENCES:
patent: 4797009 (1989-01-01), Yamazaki
patent: 5127744 (1992-07-01), White et al.
patent: 5129739 (1992-07-01), Asai et al.

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