Integrated hydrodynamic bearing/motor assembly

Details Integrated hydrodynamic bearing/motor assembly Integrated hydrodynamic bearing/motor assembly

1994-03-10

1995-09-05

LaBalle, Clayton E.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 360 9807, 384110, H02K 708, H02K 714, F16C 3206, G11B 1708

Patent

active

054481201

ABSTRACT:
A spindle and hub assembly in a disk drive having an integrated motor including a housing having a cylindrical sleeve and two end flanges, the cylindrical sleeve and the upper end flange being one piece and forming the hub and the lower end flange being pressed into the hub and a shaft being rotatably supported in the end flanges by means of hydrodynamic bearings, where the hydrodynamic bearings have conical bearing surfaces converging towards the interior of the housing, whereby a high precision and low cost spindle and hub assembly is provided.

REFERENCES:
patent: 3851933 (1974-12-01), Jacobson
patent: 4712031 (1987-12-01), Anderson
patent: 4717977 (1988-01-01), Brown
patent: 4795275 (1989-01-01), Titcomb et al.
patent: 4828403 (1989-05-01), Schwartzman
patent: 4919547 (1990-04-01), Schwartzman
patent: 4998033 (1991-03-01), Hisabe et al.
patent: 5001581 (1991-03-01), Elsasser et al.
patent: 5019738 (1991-05-01), Weilbach et al.
patent: 5031061 (1991-07-01), Hatch
patent: 5112142 (1992-05-01), Titcomb et al.
patent: 5173797 (1992-12-01), Zedekar et al.
patent: 5200866 (1993-04-01), Fruge et al.
patent: 5323076 (1994-06-01), Hajec
IEEE Transaction on Magnetics. vol. 23, No. 5, pp. 3687-3689, Sep. 1987, New York, US, Bouchard et al.; "An Investigation of Non-Repeatable Spindle Runout".

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