| 摘要 |
A clutch assembly 10 for use in a housing 26 has a race surface 32 and includes a shaft 13 ; an output structure 11 ; a cam 16 ; and a clutch plate 18 . Follower structure 28 is associated with the cam. An input structure 14 is mounted on the shaft for rotation with respect to the shaft. The input structure 14 receives an input motion such that rotation of the input structure causes rotation of the cam 16 and shaft 13 so as to drive the output structure 11 . During a back drive condition of the motor, when the output structure 11 is driving and torque is transmitted to the shaft 13 and thus to the cam 16 , the cam causes the follower structure 28 to contact and exert pressure on the race surface 32 thereby preventing rotation of the shaft 13.
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