| 摘要 |
PROBLEM TO BE SOLVED: To restrain abrasion of a sliding surface while reducing frictional resistance in the sliding surface of a bearing of a ball joint. SOLUTION: Since at least one maximum height roughness Rz of an outer surface S1 of a head part 31a of a ball stud 31 and an inner surface S2 of the bearing 33 of a ball joint 24 mutually sliding via a spherical surface-shaped sliding surface is set in a range of 2.0±0.5, a proper quantity of grease can be held without increasing contact bearing pressure by securing the contact area of the sliding surface, and relative rotation of the head part 31a of the ball stud 31 and the bearing 33 can be smoothly performed while preventing abrasion of the sliding surface. COPYRIGHT: (C)2009,JPO&INPIT
|
