Patent ID: 8104964
Filing Date: 2012-01-31
Classification: F16C

Abstract:
1. A fluid dynamic bearing unit including: a housing; a bearing sleeve accommodated in the housing; a shaft member inserted into an inner periphery of the bearing sleeve; and a radial bearing portion for supporting the shaft member in a radial direction without contact by a dynamic pressure effect of a lubricating fluid occurring in a radial bearing clearance between the inner periphery of the bearing sleeve and an outer periphery of the shaft member, the fluid dynamic bearing unit being characterized in that: the bearing sleeve comprises a plurality of bearing sleeves arranged axially separated from each other; a spacer part arranged between the axially-separated bearing sleeves; the spacer part is stationarily arranged on the housing; the plurality of bearing sleeves are fixed to the spacer part by adhesion at their respective ends opposed to ends of the spacer part; and an adhesive pocket having a circumferential groove shape along a circumferential direction is formed between the respective ends of said bearing sleeves and the ends of the spacer part.