| 摘要 |
Provided is a wheel bearing device, comprising a constant velocity universal joint (6) and a wheel bearing (20) comprising: an outer race (5) having double-row outer raceway surfaces (13, 14) formed on an inner periphery thereof; a hub wheel (1) and an inner race (2) having double-row inner raceway surfaces (7, 8) formed on outer peripheries thereof so as to be opposed to the outer raceway surfaces (13, 14); and double-row rolling elements (3, 4) interposed between the outer raceway surfaces (13, 14) of the outer race (5) and the inner raceway surfaces (7, 8) of the hub wheel (1) and the inner race (2), the wheel bearing (20) having the constant velocity universal joint (6) separably coupled thereto with a screw fastening structure (M), in which a stem section (30) of an outer joint member (24) of the constant velocity universal joint (6) is fitted to an inner diameter portion of the hub wheel (1), in which a plurality of projecting portions (37) extending in an axial direction are formed on the stem section (30) of the outer joint member (24), and a plurality of depressed portions (39) having an interference with respect to the plurality of projecting portions (37) are formed on the hub wheel (1), and the stem section (30) of the outer joint member (24) is press-fitted to the hub wheel (1), and a shape of the projecting portions (37) is transferred to the other, to thereby provide a projection and depression fitting structure in which the projecting portions (37) and the depressed portions are brought into close contact with each other at an entire fitting contact portion therebetween. |
