Patent ID: 8323117
Filing Date: 2012-12-04
Classification: B60B,B60Y,F16C,F16D,Y02T,Y10T

Abstract:
1. A wheel bearing device comprising: an outer member having double row raceway surfaces on an inner periphery; an inner member having double row raceway surfaces opposing the double row raceway surfaces of the outer member, a wheel attaching flange on an outer periphery on an out-board side end, and double row rolling elements interposed between the raceway surfaces of the outer member and the raceway surfaces of the inner member; and an outer joint member including a stem and a stem shaft section, wherein the inner member is configured by a hub having the flange and an inner ring press-fitted onto a shaft section of the hub, and the stem shaft section of the outer joint member is fitted into the hole section of the hub so as to be integrated with the hub by a projection and recess mating structure, wherein the outer joint member has a stepped surface and a groove configured to enable a boot to be attached therein, the stepped surface and the groove are disposed on an outer diameter surface of the outer joint member; and the stepped surface is disposed on the outer diameter surface of the outer joint member so as to be closer to the out-board side than the groove, and wherein the projection and recess mating structure is configured by a projection extending in an axial direction and being disposed on one of the stem shaft section of the outer joint member and an inner diameter surface of the hole section of the hub, and being press-fitted into the other of the stem shaft section of the outer joint member and an inner diameter surface of the hole section of the hub by an axial direction load being applied onto the stepped surface, such that the projection forms a recess that mates in close contact with the projection disposed on the one of the stem shaft section of the outer joint member and the inner diameter surface of the hole section of the hub.