The electric hoist overhead crane is composed of four parts: bridge box frame, trolley drive mechanism, trolley and electrical equipment. A stationary electric hoist is installed on the trolley frame as a lifting mechanism. LD Type Transmission The operation of the trolley is divided into two types: LD type transmission and QD type transmission. The structure is simple and lightweight, with a small overall height and light weight. It is suitable for factories, mines, workshops, warehouses and other work places in the light to medium load range. There are three operating modes: ground handle, wireless remote control and driver's cab. There are two types of cabins: open and closed.