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.

The air winch is a kind of winch that uses the compressed gas provided by the air compressor as the power source. Compared with the traditional electric winch, the air winch has the characteristics of explosion-proof, dust-proof and liquid splash proof, which is more suitable for working in harsh environments. Therefore, the air winch is widely used in ships, oil mining, mining and electric power industries.