| 摘要 |
The present invention relates to a dust cover for a ball joint which improves a following performance relative to a swinging motion of a ball stud, thereby improving a sealing performance. A dust cover (1) for a ball joint which is provided with a seal portion (3) fitted to an outer periphery of a ball stud at a time of mounting is provided in one end of a membrane portion (2) made of a rubber-like elastic element, and a reinforcing ring (21) which is embedded in the seal portion (3), the reinforcing ring (21) having such a shape that a collar portion (23) is integrally provided on an inner peripheral side of a cylindrical main body (22) to be extended in a diametrically inward direction, and an inner diameter of the collar portion (23) being set to have such a dimension that there exists no play in a diametrical direction relative to an outer diameter of the ball stud (41), Further, an inner peripheral seal projection (6) capable of coming in tight contact with an outer peripheral surface of the ball stud (41) at a time of mounting is provided in an inner peripheral surface of a portion arranged in an upper side of the collar portion (23) in an inner peripheral side of the cylindrical main body (22) in the reinforcing ring in the rubber-like elastic element (21). |
