The working principle of the reciprocating hoist is to lift and lower the items through the lifting device, usually driven by the chain, and control the motor through frequency conversion speed control to move the lifting car up and down. The reciprocating elevator is driven by a chain, and the motor controls the car up and down. The lift car is equipped with a transmission mechanism so that the conveyor automatically enters the lift car of the lift. This kind of elevator has advanced control, reliable performance, and high positioning accuracy of the car