| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device for a wheel can reduce a sudden slip generated between a caulking part and a shoulder part of an outer joint member, and prevent production of a stick slip sound. SOLUTION: In the bearing device for the wheel, the outer joint member 14 is connected to a hub ring 2 with an inner wheel 3 fixed thereto by the caulking part 6 so as to transmit torque via serration and to be attachable/detachable in the axial direction. A cap 17 formed of a steel plate by pressing is mounted on the caulking part 6. The cap 17 includes: a disk-shaped abutting part 17a; a cylinder part 17b axially extending from an outer diameter of the abutting part 17a; and an engagement part 17c projecting internally in a diameter direction from the end of the cylinder part 17b, whose inner diameter is set to be slightly smaller than the outer diameter of the caulking part 6. A low friction film 19 by penetrating diffusion plating of molybdenum disulfide is formed on the surface of the cap 17. COPYRIGHT: (C)2009,JPO&INPIT |
