Patent ID: 6342743
Filing Date: 2002-01-29
Classification: F16C,H02K

Abstract:
A bearing mechanism, comprising:first and second bearings disposed at different positions in an axial direction, each of the bearings having an inner race, an outer race, and balls, wherein the balls have a coefficient of linear expansion that is different from a coefficient of linear expansion of the inner and outer races; a shaft holding the inner races of both bearings in an axially separated manner; a supporting member for axially separating the outer races of the bearings, wherein, as a temperature of the bearing member changes, the supporting member has a compensation member that changes a distance between the outer races in a changing ratio that differs from a changing ratio of a distance between the inner races; wherein the inner and outer races of each of the bearings are fixed in an axially shifted manner, whereby pre-loaded pressures are applied between the inner races and the balls and between the outer races and the balls; and wherein the supporting member is free of contact with the inner races.