| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device for a wheel, wherein a spigot fitted in is not pulled out even if load fluctuation is repeated. <P>SOLUTION: A hole 1d is formed at the center of a flange part of a hub shaft 1, the spigot 12 is press-fitted into the hole 1d. A press-fitted part 12f is formed to an outer peripheral surface of a tubular part 12a of the spigot 12 press-fitted in the hole 1d in a serration form inclined in relation to an axial direction. The press-in part 12f includes a recess and a projection of a surface in the axial direction, and a recess and a projections of a surface in a circumferential direction. <P>COPYRIGHT: (C)2008,JPO&INPIT |
