| 摘要 |
An input disk and a clutch disk are supported by an output shaft in such a manner that the input disk is rotatable relative to the output shaft, and the clutch disk is non-rotatable relative to and is axially movable relative to the output shaft. When a large load torque is exerted about the output shaft, relative rotation between the input disk and the clutch disk occurs. A connecting rod has one end connected to a worm wheel, and is reciprocally swung through rotation of the worm wheel. A rotatable lever has one end, which is connected to the other end of the connecting rod, and has the other end, which is engaged with and is secured integrally with the gear teeth of the input disk.
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