| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a bearing unit for a driving wheel where a serration of a hub ring is not affected by the deformation generated in press-fitting and caulking process of an inner ring and a wheel drive unit incorporating the bearing unit for driving wheel. <P>SOLUTION: The bearing unit 2 for the driving wheel is equipped with the hub ring 4 which has a mounting flange 5 of the wheel and a cylindrical small diameter stepped part 4b on an outer periphery and a serration 7 formed on an inner periphery, an inner ring 9 externally fitted to the hub ring 4, an outer member 10 having the mounting flange 10b of the vehicle body on the outer periphery, and a double-row rolling bearing 6 having a double-row rolling body 12 housed between the outer member 10, the hub ring 4, and the inner ring 9, and fixes the inner ring 9 at the caulking part 8 formed by plastically deforming the end part of the small diameter stepped part 4b in outward radial direction. In the manufacturing method of the bearing unit 2, a hub ring material 4' is rotated in a state supporting the mounting flange 10b of the vehicle body after assembling and caulking the unit 2, and the serration 7 is formed after finishing the inside diameter. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
