The QD type hook bridge crane is a general-purpose bridge crane with a single trolley. The crane operates by relying on the longitudinal movement along the supporting track direction of the factory's overhead beam, the lateral movement of the trolley, and the lifting and lowering of the hook to complete its work process. The commonly used lifting capacity ranges from 5 to 50 tons, with a working grade of A5 to A7. There are three types of control methods available for users to choose from: ground control, cabin control, and remote control. Level A5 is suitable for general machining and assembly workshops, metal structure workshops, and mechanical maintenance workshops where the workload is not very high.