Patent ID: 8944694
Filing Date: 2015-02-03
Classification: B60B,F16C,F16D,Y10T

Abstract:
1. A bearing device for a driving wheel, comprising: an outer member having an inner periphery in which double-row outer raceway surfaces are formed; an inner member comprising a hub wheel provided with a flange to be attached to the driving wheel, and an inner race, and having an outer periphery in which double-row inner raceway surfaces are formed so as to oppose the outer raceway surfaces; double-row rolling elements interposed between the outer raceway surfaces of the outer member and the inner raceway surfaces of the inner member; and an outer joint member of a constant velocity universal joint having a stem section which is coupled to an inner surface of the hub wheel by a recess-projection fitting structure, wherein the recess-projection fitting structure includes a plurality of projections which are formed on one of the hub wheel and the stem section and extend in an axial direction, and a plurality of recesses which are formed in another one of the hub wheel and the stem section by press-fitting the projections thereinto so as to transfer shapes of the projections such that the recesses and the projections fit with interference at an entire fitting region thereof, the recesses having portions cut by the projections, respectively, wherein the hub wheel and the outer joint member coupled by the recess-projection fitting structure are separable from each other, and wherein an end surface of each projection on a side of the one of the hub wheel and the stem section at which press-fitting is started is brought into contact in the axial direction with the another one of the hub wheel and the stem section having the recesses while not being allowed to pass through the another one of the hub wheel and the stem section having the recesses.