| 摘要 |
The sheave and cable assembly includes a center sheave plate having an arcuate, cable-wrapping track and an exterior shoulder truncating the cable-wrapping track to accommodate a cable end fitting that is supported between adjacent sheave side plates for rotation relative to the sheave. The end fitting includes an outer, arcuate cable-wrapping shoulder which is generally contiguous with the cable-wrapping track on the center sheave plate when the end fitting is in a "cable wrap/unwrap" position in cooperative relation to the sheave center plate. This position of the cable end fitting permits wrapping of the cable on the track by rotation of the sheave in one direction and paying off (unwrapping) of the cable by rotation of the sheave in the opposite direction. When the cable is payed off the track and the sheave is rotated in a "wrong" direction (i.e., what normally is the cable unwrapping direction) in an attempt to wrap the cable on the track, the cable end fitting is rotatable to an "anti-reverse" position in non-cooperative relation to the center sheave plate. In the "anti-reverse" position, a shoulder on the cable end fitting bindingly engages the exterior shoulder on the sheave center plate to resist wrapping of the cable on the cable-wrapping track by rotation of the sheave in the "wrong" direction (cable unwrapping direction). This anti-reverse action of the cable end fitting supplements or replaces anti-reverse action provided by an anti-reverse pawl on the winch housing.
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