| 摘要 |
A drive shaft and driven chain sprocket are interconnected by an overload clutch embodying a shear pin. The overload clutch includes a first clutch element fixed for rotation with the shaft, a second clutch element mounted on the shaft next to the first clutch element for axial and rotational movement relative to the first clutch element. The second clutch element includes a circular flange disposed against a flat circular surface of the sprocket and coupled for rotation therewith by a shear pin extending through aligned holes in the flange and sprocket. The sprocket is mounted for rotation about a cylindrical shoulder provided on one side of the circular flange of the second clutch element. The first and second clutch elements respectively have positive engaging surface elements that are normally held in locking engagement with each other by a coil compression spring acting between the shaft and the sprocket. After load condition causes the a shear pin to shear, a realignment of holes in the second clutch element flange and the sprocket is achieved by overcoming the force holding the first and second clutch elements in engagement with each other and then rotating the second clutch element relative to the first clutch element and the sprocket.
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