The hand chain hoist is an upgraded version of the pulley, which fully inherits the advantages of the pulley. The labor-saving principle of the chain hoist is to use the mechanical principle to drive the chain to generate traction. Using the gear transmission method, the pinion drives the large gear and the torque is amplified. Passed out to drive the lifting chain to complete lifting and lifting of the weight.
When the chain hoist lifts the cargo upwards, the bracelet is pulled down to rotate the bracelet wheel clockwise, the hand wheel rotates, the friction plate ratchet and the brake are pressed together to rotate together, so the hand wheel drives the transmission gears to make the lifting sprocket The chain is driven to smoothly lift the cargo. The ratchet friction plate type one-way brake is used to automatically brake under load. The pawl is engaged with the gear under the action of the spring to ensure that the cargo stays in the air and does not fall by itself.
When descending, pull down another bracelet to make the bracelet rotate counterclockwise. At this time, the claws release the ratchet, and under the weight of the lower hook, it can be smoothly lowered. When the bracelet stops pulling, the brake is immediately The brake function is restored so that the cargo can be stopped at any position.