Patent ID: 6502990
Filing Date: 2003-01-07
Classification: F16C

Abstract:
A hydrodynamic bearing device comprising:a cylindrical bearing sleeve which has a first dynamic pressure generating surface; a shaft member which has a second dynamic pressure generating surface and is rotably attached to said bearing sleeve; a lubricant filled in a gap between said first and second dynamic pressure generating surfaces; a covering member which is fixed by adhesive to one of the openings of said bearing sleeve to prevent said lubricant from leaking; and an adhesive which is applied in a joining portion between said bearing sleeve and said covering member to seal a gap therebetween; wherein said adhesive is a two-part liquid epoxy resin adhesive that satisfies the condition,n/2&lE;m&lE;2n where m is the molecular-weight of a primary agent and n is the molecular-weight of a curing agent.