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The principle of the hand chain hoist is: the hand-drawn chain drives the active pinion to rotate, the pinion drives the large gear to rotate, and the amplified torque is output to lift the heavy object. Inside the hand zipper strip there is a ratchet pawl mechanism that allows the sprocket to rotate in only one direction.
What is the difference between lever hoist and chain hoist?
The principle of labor saving of the hand chain hoist and the lever hoist is the same as that of the differential pulley; the difference is that the chain hoist is driven by a hand zipper strip, which is mostly used for vertically lifting heavy objects; the lever hoist is carried out by means of a moving handle. Drive, mostly used to move heavy objects horizontally.