| 摘要 |
PROBLEM TO BE SOLVED: To provide a dust cover for ball joint which suppresses the occurrence of so-called a port opening phenomenon of a small-sized opening part that contact between a lip part of the small-sized opening part and a shaft is lost even in a low-temperature environment and has satisfactory seal performance of the lip part.SOLUTION: In a dust cover for ball joint, a head bulb part formed on one end of a ball stud is retained within a socket, a shaft of the other end of the ball stud is fastened and fixed to a knuckle, one end large size opening part is fixed and retained to an outer circumferential surface of the socket, and other end small-sized opening part in which a reinforcing ring is embedded is retained to the shaft. Therein, the reinforcing ring is a multi-layer structure. |
