Patent ID: 6502992
Filing Date: 2003-01-07
Classification: F16C

Abstract:
A hydrodynamic bearing unit comprising a shaft member and a bearing member opposed to an outer periphery of the shaft member via a bearing clearance, and supporting said shaft member without contact by means of hydrodynamic pressure produced in said bearing clearance during the relative rotation between the shaft member and the bearing member, wherein:said shaft member comprises a plurality of parts and said bearing clearance comprises a first clearance on one axial side and a second clearance on the other axial side, said first and second clearances being mutually oppositely inclined relative to a longitudinal axis of said shaft member, wherein the first and second clearances are displaced greater inward toward an axial center of said bearing member, wherein the shaft member comprises a first shaft member and a second shaft member, wherein a width between the first and second clearances is adjusted by moving axial positions of the first and second shaft members toward or away relative to each other.