Patent ID: 6200035
Filing Date: 2001-03-13
Classification: F16C

Abstract:
A hydrodynamic gas bearing structure, comprising:a shaft body;a hollow cylindrical bearing body opposing to the shaft body with a radial space kept therebetween; anda plate-shaped member having an opposing surface opposing to an end surface in axial direction of one of said shaft body and said bearing body; whereinthe opposing surface of said plate-shaped member has a groove for generating dynamic pressure between said plate-shaped member and one of said shaft body and said bearing body, a protruded portion formed at an inner peripheral portion, and a recessed portion formed shallower than said groove, extending from the protruded portion toward an outer peripheral portion, andtop surface of said protruded portion is at a position of a first height from the bottom of said recessed portion, and an outer peripheral portion of said opposing surface includes a portion positioned at a second height lower than said first height from the bottom of said recessed portion.