| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball joint in which an internal pressure of a dust cover can be raised locally and a lubricant such as grease can be supplied smoothly to a lubrication surface between a sphere part of a ball stud and a ball seat, when a stem part of the ball stud is inclined. SOLUTION: The ball joint 1 comprising a socket 2, a ball seat 3 accommodated in the socket 2, a ball stud 4 having a sphere part 40 seated revolvably on the ball seat 3 and a stem part 41 connected integrally to the sphere part 40, dust cover 5a which is disposed between the stem part 41 of the ball stud 4 and the socket 2 and covers a pipe-shaped body 6 into which a part of the stem part 41 and/or the stem part 41 is inserted, and a lubricant g which is enclosed in the dust cover 5a and is supplied between the sphere part 40 and the ball seat 3, is characterized in that the dust cover 5a is provided with a plurality of partition vane parts 53a which face the outer circumferential surface 42a of the stem part 41 of the ball stud 4 and are arranged radially and the outer circumferential surface 42a, in inclination, abuts on at least two partition vane parts 53a, 53a.
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