Patent ID: 8393798
Filing Date: 2013-03-12
Classification: B60B,F16C,F16D,Y10T

Abstract:
1. A bearing device for a wheel, comprising: a roller bearing having an outer member having on an inner circumference thereof double row raceway surfaces; an inner member having on an outer circumference thereof double row raceway surfaces; and double row rolling elements interposed between the raceway surfaces of the outer member and the raceway surfaces of the inner member, wherein the inner member comprising on an outer surface thereof a hub wheel having a wheel attaching flange, the hub wheel being integrated with, via a convex and concave fitting structure, a shaft portion of an outer joint member of a constant velocity universal joint fitted and inserted to a hole portion of the hub wheel, wherein a convex portion extending in an axial direction and provided on one of an outer diameter surface of the shaft portion of the outer joint member of the constant velocity universal joint and an inner diameter surface of the hole portion of the hub wheel is press-fitted to another of the outer diameter surface of the shaft portion of the outer joint member of the constant velocity universal joint and the inner diameter surface of the hole portion of the hub wheel along the axial direction, and a concave portion intimately attached and fitted to the convex portion is formed on the other of the outer diameter surface of the shaft portion of the outer joint member of the constant velocity universal joint and the inner diameter surface of the hole portion of the hub wheel by the convex portion, thereby configuring the convex and concave fitting structure where an entire area of fitting and contact between the convex portion and the concave portion is in an intimate contact state, while providing a shaft portion come-off preventing structure between the shaft portion of the outer joint member and an inner surface of the hub wheel.