Hydrodynamic bearing and spindle motor and information...

Details Hydrodynamic bearing and spindle motor and information... Hydrodynamic bearing and spindle motor and information...

2011-01-04

2011-01-04

Hannon, Thomas R (Department: 3656)

Bearings

Rotary bearing

Fluid bearing

C384S114000

Reexamination Certificate

active

07862237

ABSTRACT:
As axis direction dimensions become smaller in HDD spindle motors as a result of thinner and more compact designs, there is a demand for hydrodynamic bearings with a long lifespan. As a means of solving this problem, a lubricant reservoir section is formed between a sleeve side surface and a cover side surface with a depth varying in a circumferential direction, lubricant is circulated in a bearing gap section, a sleeve end face gap section larger than a bearing gap between a sleeve end face and the cover, and a connecting channel, and the lubricant reservoir section and the sleeve end face gap section are connected via an introducing gap section having a bubble separation function.

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