| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bearing device for a driving wheel in which the weight and size of the device is reduced by plastic coupling and the surface accuracy of a flange for fitting a wheel is improved. <P>SOLUTION: In the bearing device for the driving wheel, a hub wheel 1 and an outer coupling member 14 are integrated by plastic coupling by unitizing the hub wheel 1, a constant velocity universal joint 3, and a double-row rolling bearing 2, fitting the hub wheel 1 and the outer coupling member 14 of the constant velocity universal joint 3 with each other, forming a hardened recessed and protruded part 5 on the inner peripheral surface of the hub wheel 1 in the fitting part, and causing a fitting part 17b of the outer coupling member 14 to bite into the recessed and protruded part 5 by increasing the diameter of the fitting part 17b. The adverse effect of deformation by plastic coupling on the surface accuracy of the side surface of the flange 4 for fitting the wheel is inhibited by making the amount of increasing of the diameter of an outboard side smaller than that of an inboard side in the fitting part 17b of the outer coupling member 14. <P>COPYRIGHT: (C)2003,JPO |
