| 摘要 |
The invention concerns a torsional vibration damper for a clutch, comprising an input element coupled to an output element (14) by a main damper (20) and a pre-damper (22), the pre-damper comprising a substantially cylindrical element (36) forming an outer cage wherein are mounted springs (40), said element (36) consisting of a metal part (50) whereof part is covered with overmoulded plastic (52) to form friction surfaces on the hub (14) and on a guide washer (10) and a bearing centring the guide washer (10). The invention is particularly applicable to motor vehicle clutches.
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