| 摘要 |
The present invention relates to a bearing apparatus for a wheel of vehicle for supporting a driven wheel of vehicle such as an automobile rotatably relative to its suspension apparatus, and more particularly to improve the strength and durability of a hub wheel and an inner ring press-fitted on the hub wheel used in the bearing apparatus for a wheel of vehicle. According to the present invention, there is provided a bearing apparatus for a wheel of vehicle comprising; an outer member (10) formed with double row outer raceway surfaces on the inner peripheral surface thereof; an inner member (1) including a hub wheel (52) having a wheel mounting flange (4) integrally formed therewith at one end of the inner member and a cylindrical portion axially extending from the wheel mounting flange (4) and further including at least one inner ring formed with at least one of double row inner raceway surfaces (2a,3a) opposed to the double row outer raceway surfaces (10a) and adapted to be press-fitted onto the cylindrical portion of the hub wheel; and double row rolling elements contained freely rollably between the outer and inner raceway surfaces respectively of the outer and inner members, the inner ring being secured axially immovably relative to the hub wheel by a caulked portion (2c) by plastically deforming the end of the axially extending cylindrical portion radially outward characterized in that: a partition wall (11) is formed in the axially extending cylindrical portion of the hub wheel at a portion subjected to a load applied to at least the inner raceway surface of inboard side of the double row inner raceway surfaces and a hollow portion (13) is formed within the cylindrical portion at a portion outboard side from the partition wall (11). |
