Consists of a bridge and hoisting trolley of two parts. By running the device on both ends of the bridge, bearing in the workshop or elevated above the open yard of orbit, along the rail longitudinal running; Lifting the car on the bridge girders along the trolley track horizontal run.
Lifting mechanism on lifting the car, the car running and organization in bridge rack cart running mechanism and so on three kinds of work, usually for the electric drive. General cart orbit for the straight line, crane in the work in a rectangle;
Bridge crane type diversity, the most common, the most typical is gm bridge crane. It refers to electromagnetic sucker hook, grab bucket or fetch the general use of bridge crane.