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　　Crane hook is also called a lifting pulley. It is a hook pulley group connected by a wire rope and a crane. It consists of a wire rope bypassing several pulleys at a time.

　　The basic structural form of the lifting hook is mainly composed of straight handle double hooks, safety card plates, hook beams, thrust centering roller bearings, hook nuts, pulleys, pulley shafts, deep groove ball bearings, pulley covers, shaft baffles, pulley plates, oil cups and other components. The sling is hung in a straight-handled double hook, the sling is connected to the object to be lifted, and the wire rope is connected to the pulley group from the crane output. The purpose of lifting is achieved by controlling the lifting and translation function of the crane. The double hook form can ensure overall stability.

　　The hook can achieve passive rotation function through the thrust centering roller bearing on the hook beam. But it must be based on external forces. The object being suspended will rotate only when the staff exerts lateral rotation force on the object being suspended. For some large and heavy products, the staff must apply a lot of force to rotate, and sometimes multiple staff members need to rotate together. Due to the effect of inertia, the expected rotation effect is often not achieved, and the work efficiency is low, which increases the labor intensity of the staff. Shaking and inertia during rotation cannot guarantee the personal safety of staff.

　　Crane hook is also called a lifting pulley. It is a hook pulley group connected by a wire rope and a crane. It consists of a wire rope bypassing several pulleys at a time.

　　The basic structural form of the lifting hook is mainly composed of straight handle double hooks, safety card plates, hook beams, thrust centering roller bearings, hook nuts, pulleys, pulley shafts, deep groove ball bearings, pulley covers, shaft baffles, pulley plates, oil cups and other components. The sling is hung in a straight-handled double hook, the sling is connected to the object to be lifted, and the wire rope is connected to the pulley group from the crane output. The purpose of lifting is achieved by controlling the lifting and translation function of the crane. The double hook form can ensure overall stability.

　　The hook can achieve passive rotation function through the thrust centering roller bearing on the hook beam. But it must be based on external forces. The object being suspended will rotate only when the staff exerts lateral rotation force on the object being suspended. For some large and heavy products, the staff must apply a lot of force to rotate, and sometimes multiple staff members need to rotate together. Due to the effect of inertia, the expected rotation effect is often not achieved, and the work efficiency is low, which increases the labor intensity of the staff. Shaking and inertia during rotation cannot guarantee the personal safety of staff.