How tie down ratchet works
When a moving part makes a rotational movement, it is prevented from moving in the opposite direction. The outer circle of the moving part is made into a tooth shape, and a pawl is installed. When the moving part is to make a reverse movement, the pawl is on the tooth (outside The circle tangent direction) achieves one direction of movement of the object. Such as flyman used by repairman, chain hoist, tube hinged machine, coiler, bicycle flywheel, etc.
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