| 摘要 |
PROBLEM TO BE SOLVED: To provide an axle bearing device such as a vehicular hub unit allowing the joint of an outer ring of a constant velocity universal joint to a hollow shaft portion of a hub wheel without backlash in the axial direction to prevent the operation of a compressive load on the hollow shaft portion in the axial direction. SOLUTION: The hub wheel 1 is provided with plural-line rolling bearings 2 and a constant velocity universal joint 3. The vehicle inner side shaft end of the hollow shaft portion 12 of the hub wheel is caulked to the outer end face of a vehicle inner side inner ring 25. A peripheral groove 12d is provided on the vehicle outer side of the hollow shaft portion. The outer ring of the constant velocity universal joint is joined to the hollow shaft portion without backlash in the axial direction by fitting a snap ring 50 being elastically increased in diameter into the peripheral groove with the outer ring shaft portion 36 spline-fitted into the hollow shaft portion. The snap ring being positioned in the axial direction is fixed to the vehicle outer side shaft end of the outer ring shaft portion. Thus, the elastic force for spreading diameter of the snap ring in the peripheral groove is converted into the force for pulling the outer ring shaft portion to the vehicle outer side to prevent a compressive load in the axial direction from applying to the hollow shaft portion. |
