The winch converts electrical energy into mechanical energy through motor 1, that is, the rotor of the motor rotates and outputs, and drives drum 6 to rotate after decelerating through V-belt 2, shaft 3, gear 4 and gear 5. The drum winds the steel wire rope 7 and passes the pulley blocks 8 and 9 to make the crane hook 10 lift or drop the load Q, convert the mechanical energy into mechanical work, and complete the vertical transportation and loading and unloading of the load.

Winch, a small and light lifting equipment that uses a drum to wind steel wire rope or chain to lift or pull heavy objects, is also called a winch. The winch can lift the heavy object vertically, horizontally or obliquely. Winches are divided into manual winch, electric winch and hydraulic winch. Mainly electric winch. It can be used alone or as a component of hoisting, road building, mine hoisting and other machinery. It is widely used because of its simple operation, large amount of rope winding and convenient displacement. It is mainly used for lifting or hauling materials in buildings, water conservancy projects, forestry, mines, docks, etc.