Fluid dynamic bearing apparatus and a motor using the same

Details Fluid dynamic bearing apparatus and a motor using the same Fluid dynamic bearing apparatus and a motor using the same

2005-05-16

2010-10-26

Hannon, Thomas R (Department: 3656)

Bearings

Rotary bearing

Fluid bearing

C384S107000

Reexamination Certificate

active

07819585

ABSTRACT:
Assembly precision in a motor is improved and greater cost reduction is achieved. A fluid dynamic bearing apparatus includes a housing and bearing sleeve as fixed-side members, a shaft member as a rotational-side member having a portion for mounting a rotor magnet, and a disk hub. The shaft member is supported by the bearing sleeve in the radial direction in a non-contact manner by the hydrodynamic effect of a lubricating oil produced in a radial bearing gap between the inner circumferential surface of the bearing sleeve and the outer circumferential surface9of the shaft member while the shaft member is in rotation. The apparatus includes a disk hub which is fixed on the shaft member and has a portion for mounting the rotor magnet, and the disk hub is a molded resin article formed by insert-molding using the shaft member as an insert piece.

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