Hydrodynamic bearing device and spindle motor having the...

Details Hydrodynamic bearing device and spindle motor having the... Hydrodynamic bearing device and spindle motor having the...

2006-04-20

2009-11-24

Le, Thanh-Tam T (Department: 2839)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S06700R

Reexamination Certificate

active

07622837

ABSTRACT:
A set of radial dynamic pressure generating grooves constitute a radial bearing, and an entire width (L) of the radial dynamic pressure generating groove is reduced. A set of thrust dynamic pressure generating grooves constituting a thrust bearing are formed so that an area where a maximal thrust dynamic pressure is generated (diameter) is increased, and a bearing angle stiffness of the thrust bearing is increased. The thrust bearing having the high bearing angle stiffness shares a moment load applied to a shaft to thereby compensate for a bearing angle stiffness of the radial bearing whose bearing stiffness is small because an entire width of the radial bearing is small. Thus, a thin-shaped hydrodynamic bearing capable of withstanding a large moment load is obtained.

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patent: 2000-215589 (2000-08-01), None
patent: 2003-092867 (2003-03-01), None
English Language Abstract of JP 2000-215589.
English Language Abstract of JP 2003-092867.

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