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　　Crane hook, also known as a lifting pulley, is a hook pulley set connected to a crane through a wire rope, and has a device composed of a wire rope bypassing several pulleys at a time.

　　The basic structural form of the hook of a crane 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 end baffles, pulley plates, oil cups and other components. Hang a sling in the straight-handled double hook, the sling is connected to the object to be lifted, and the wire rope is output from the crane and is connected to the pulley set. The purpose of lifting is achieved by controlling the lifting and translation functions of the crane. The double hook form can ensure overall stability.

　　The lifting hook can achieve passive rotation through the thrust centering roller bearing on the hook beam. But it must be based on the exertion of external forces. Only when the staff exerts lateral rotation force on the object to be held, will the object to be held rotate. For some products with large volume and heavy weight, staff must apply a lot of force to rotate them, and sometimes multiple staff members are even needed to rotate them together. Due to the effect of inertia, the expected rotation effect is often not achieved, and the work efficiency is low, and the labor intensity is also increased to help staff. Shaking and inertia during rotation cannot guarantee the personal safety of the staff.

　　Crane hook, also known as a lifting pulley, is a hook pulley set connected to a crane through a wire rope, and has a device composed of a wire rope bypassing several pulleys at a time.

　　The basic structural form of the hook of a crane 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 end baffles, pulley plates, oil cups and other components. Hang a sling in the straight-handled double hook, the sling is connected to the object to be lifted, and the wire rope is output from the crane and is connected to the pulley set. The purpose of lifting is achieved by controlling the lifting and translation functions of the crane. The double hook form can ensure overall stability.

　　The lifting hook can achieve passive rotation through the thrust centering roller bearing on the hook beam. But it must be based on the exertion of external forces. Only when the staff exerts lateral rotation force on the object to be held, will the object to be held rotate. For some products with large volume and heavy weight, staff must apply a lot of force to rotate them, and sometimes multiple staff members are even needed to rotate them together. Due to the effect of inertia, the expected rotation effect is often not achieved, and the work efficiency is low, and the labor intensity is also increased to help staff. Shaking and inertia during rotation cannot guarantee the personal safety of the staff.