The winch is driven by the motor, and the power is transmitted to the reducer through the coupling, and then to the big gear driven by the open gear pair and the main shaft. The outer conical surface riveted with asbestos belt and the inner conical surface of the drum form a conical clutch. When the brake is released to operate the clutch handle to combine the conical clutch, the big gear will drive the drum to rotate, roll up the steel wire rope to lift or drag the heavy object; When the conical clutch is disengaged, the drum rotates freely on the main shaft under the gravity of the heavy object, so as to lower the heavy object or slide the hammer head. When the conical clutch is disengaged and the stop handle is operated, the brake belt can brake the drum, and the lowering speed of the heavy object can also be controlled. When the heavy object needs to be suspended at a certain position in the air, it can be supported by the brake, Operate the handle to insert the pawl into the ratchet teeth of the ratchet wheel to prevent the drum from reversing; If you want to continue to lower the weight, first combine the conical clutch to lift the weight slightly upward. At this time, immediately disengage the pawl and release the conical clutch, and the weight can continue to lower.