| 摘要 |
A driving-wheel bearing device includes: an outer race (50) having double-row outer raceway surfaces (52, 54) formed on an inner periphery thereof; a hub wheel (10) and an inner race (20) having a wheel attachment flange (14) at one end thereof and double-row inner raceway surfaces (12, 22) on an outer periphery thereof; and double-row rolling elements (30, 40) interposed between the outer raceway surfaces (52, 54) of the outer race (50) and the inner raceway surfaces (12, 22) of the hub wheel (10) and the inner race (20), the hub wheel (10) having a shaft hole into which a stem section (66) extending from an outer joint member (62) of a constant velocity universal joint (60) is spline-fitted by being press-fitted, in which a plate (80) having a molybdenum coating layer or a fluorine-resin coating layer (81) formed thereon and having a plate thickness ranging from 0.5 mm to 2 mm is interposed between opposite surfaces of a shoulder portion (61) of the outer joint member (62) and an crimped portion (13) of the hub wheel (10). |
