| 摘要 |
The pulley device for a belt or chain tensioning or guide roller comprises a pulley 12, a rolling bearing 14, a spacer 18 supporting the rolling bearing and comprising a transverse mounting surface 48 adapted to allow the device to be attached against an external element, an attachment screw 20 that is immobilized axially relative to the spacer and that comprises a threaded portion 58, and a retaining ring 22 for retaining the relative axial position of the attachment screw and of the spacer. The retaining ring 22 has, in the free state, an internal diameter that is smaller than the diameter of the threaded portion and is open at a point of its circumference so as to be radially elastic. |
