| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bearing device for a driving wheel which improves a durability of a caulking part against a moment load in the bending direction. <P>SOLUTION: A small-diameter inner circumference surface 14 and outer circumference surface 16 of a hub wheel 10 are fitted into an outer coupling member 40. By this, supporting reaction forces in the direction of the inner diameter and the outer diameter are applied to the hub wheel 10 from the outer coupling member 40 when the moment load in the bending direction is applied. Since a bending phenomenon between the hub wheel 10 and the outer coupling member 40 is restrained by these two supporting reaction forces, stress generated at the caulking part A is decreased, and the durability of the caulking part A is improved. <P>COPYRIGHT: (C)2008,JPO&INPIT |
