| 摘要 |
The invention relates to a hydrokinetic coupling device comprising a lock-up clutch which comprises: - at least one friction disc (50, 50A, 50B) mounted such that it can slide axially with respect to a first rotary shaft; - at least one first backing disc (58, 58A, 58B, 58C) rotating as one with a secondary rotary shaft; - a support ring (66) to support the backing disc (58, 58A, 58B, 58C) and which comprises at least one axial guide groove (62B) circumferentially delineated by an upstream face and by a downstream face, a radial guide tooth (60B) of each backing disc (58, 58A, 58B, 58C) being housed such that it can slide axially in the groove (62B); characterized in that it comprises elastic preload means (82) which are able to exert a preload torque to clamp the guide tooth of each backing disc (58, 58A, 58B, 58C) circumferentially against one of either the upstream (68) or downstream (70) faces of the guide groove (62B). |
