| 摘要 |
Provided is a bearing device for a wheel, including a bearing (20) for a wheel including: 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 bearing (20) for a wheel having a constant velocity universal joint (6) separably coupled thereto with a screw fastening structure (N), 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 convex portions (37) extending in an axial direction are formed on the stem section (30) of the outer joint member (24), and a plurality of concave portions (39) having an interference with respect to only circumferential side wall portions of each of the plurality of convex 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 only the circumferential side wall portions of the each of the convex portions (37) is transferred to the hub wheel (1), to thereby provide a convex and concave fitting structure in which the convex portions (37) and the concave portions are brought into close contact with each other at an entire fitting contact portion therebetween. |
