Spindle motor with hybrid air/oil hydrodynamic bearing

Details Spindle motor with hybrid air/oil hydrodynamic bearing Spindle motor with hybrid air/oil hydrodynamic bearing

1998-12-30

2000-06-06

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384100, F16C 3206

Patent

active

060710144

ABSTRACT:
The present disclosure relates to a spindle motor including a shaft having an outer circumferential surface. The spindle motor also includes a thrust plate fixedly connected to the shaft. The thrust plate projects radially outward from the outer circumferential surface of the shaft and includes top and bottom surfaces. The spindle motor also includes a hub assembly mounted on the shaft. The hub assembly is adapted for mounting a storage disk. The spindle motor further includes a liquid hydrodynamic bearing and an aerodynamic bearing. The liquid hydrodynamic bearing is formed along the top and bottom surfaces of the thrust plate and is adapted for transferring loads in an axial direction relative to the shaft. The aerodynamic bearing is formed along a portion of the hub assembly and is adapted for transferring loads in a radial direction relative to the shaft.

REFERENCES:
patent: 4200344 (1980-04-01), Binns et al.
patent: 4573807 (1986-03-01), Asada et al.
patent: 5112141 (1992-05-01), Asada et al.
patent: 5358339 (1994-10-01), Konno et al.
patent: 5504637 (1996-04-01), Asada et al.
patent: 5516212 (1996-05-01), Titcomb
patent: 5664889 (1997-09-01), Gustafson
patent: 5707154 (1998-01-01), Ichiyama
patent: 5770906 (1998-06-01), Hazelton et al.
patent: 5839833 (1998-11-01), Zang
patent: 5847479 (1998-12-01), Wang et al.

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