| 摘要 |
The object of the present invention is to improve the formability of a reinforcing ring by providing a dust cover(1) for a ball joint in which decrease in the tracking property of a shaft side attaching portion(12) against an oscillation of a ball stud is prevented. In order to achieve this object, the reinforcing ring(15) is buried in the shaft side attaching portion(12) which is closely fitted and fixed to an outer peripheral surface of a shaft portion(203b) of the ball stud(203) of the ball joint(200), a first inner peripheral projection and a second inner peripheral projection are formed at different axial positions in the reinforcing ring(15) at predetermined intervals in a circumferential direction, the first inner peripheral projection(151) and the second inner peripheral projection(152) having diameters which are slightly greater than an inner peripheral surface of the shaft side attaching portion(12) in their end portions in an inner diameter side as well as extending to the inner diameter side, and the first inner peripheral projection (151) and the second inner peripheral projection(152) exist on phases which do not lap over each other in an axial direction. |
