| 摘要 |
The invention relates to a mechanical transmission device for transmitting a threshold force, the device comprising a first element (1; 101) and a second element (2; 102) rotatably mounted relative to each other about an axis of rotation (X), and having a transmitter member (10; 110) interposed between them to constrain the two elements to rotate together when a torque is imparted to one of the elements for transmitting the torque to the other one of the elements, up to a threshold torque beyond which the two elements become movable in rotation against an opposing torque equal to the threshold torque, the transmitter member comprising: at least a first friction disk (11; 111) constrained to rotate with the first element, and a second friction disk (12; 112) facing the first disk; a bearing member (13; 113) that is axially movable to press the disks together and against a bearing turntable (15; 115) of the first element under drive from a presser member; and rotary drive means (20, 21; 120, 121) interposed between the bearing member and the second element, which rotary drive means are arranged to cause the bearing member to move axially against the spring member during rotation.
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