| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bearing device for a wheel in which circumferential play is suppressed, which facilitates connection workability between a hub ring and an outer coupling member of a constant velocity universal joint. <P>SOLUTION: In the bearing device for the wheel, the hub ring 1, a multirow rolling bearings 2, and the constant velocity universal joint 3 are unitized. The bearing device has a groove-ridge fitting structure M by which the hub ring 1 and a shaft section 12 of the outer coupling member of the constant velocity universal joint inserted into an opening section 22 of the hub ring 1 are integrated together. A centering tapered section 22d whose diameter is shrunk in a press-fitting direction is formed in the opening section 22 of the hub ring 1. The shaft section 12 of the outer coupling member is press-fit in the opening section 11 of the hub ring 1 through the tapered section 22d. The whole fitting contact portion 38 between ridges 35 on the outer diameter surface of the shaft section 12 of the outer coupling member and grooves 36 on the inner diameter surface of the hub ring 1 fitted to the ridges 35 is in an intimate contact. Accordingly, the groove-ridge fitting structure M is comprised. <P>COPYRIGHT: (C)2009,JPO&INPIT |
