The working principle of chain block for lifting heavy objects is actually very simple.
The chain block rotates by pulling the manual chain and hand chain wheel to press the friction plate ratchet and brake seat into a whole and rotate together. The tooth long shaft rotates the plate gear, the tooth short shaft and the spline hole gear.
In this way, the lifting chain wheel installed on the spline hole gear drives the lifting chain, so as to steadily lift the heavy object. The one-way brake with ratchet friction plate is adopted, which can brake automatically under load. The pawl is engaged with the ratchet under the action of spring, and the brake works safely.
As an upgraded fixed pulley, the chain block completely inherits the advantages of the fixed pulley. At the same time, it adopts the combination of the reducer of the reverse check brake and the chain pulley block, and symmetrically arranges the secondary spur gear rotation structure, which is simple, durable and efficient.
