| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent an inner ring from coming off in an assembling step without affecting bearing functions. <P>SOLUTION: This bearing device comprises an outer member 1 having a double row raceway surface 3 on its inner periphery, an inner member 2 having a raceway surface 4 facing the raceway surface 3, and double row rolling elements 5 interposed between the raceway surfaces 3 and 4 facing each other, and supports a drive wheel. The inner member 2 comprises a hub wheel 9 having a hub flange 9a on its outer periphery and an inner ring 10 fitted to the inboard side end outer periphery of the hub wheel 9. The raceway surface 4 for each row is formed on the hub wheel 9 and the inner ring 10. A step part 16 continued to the inboard side end face 10a of the inner ring 10 and having a depth equal to the height of the inner peripheral edge of the end face 10a is formed at the inner peripheral surface inboard side end of the inner ring 10. A caulked tube part 9b formed on the hub ring 9 is processed to increase its diameter and engaged with the locking surface of the inner ring 10 facing in the axial direction of the step part 16. The caulked tube part 9b must not be projected from the end face 10a of the inner ring 10. The wall thickness t of the caulked tube part 9b is set to 1.5 to 4 mm. <P>COPYRIGHT: (C)2007,JPO&INPIT |
