- May 10, 2018 -
Why hand hoist can save effort？
First, the hand hoist, as the fixed pulley of the upgraded version, fully inherits the advantages of the fixed pulley. At the same time, it adopts the combination of the reverse reverse stop brake and the chain pulley group, and the symmetrical arrangement of the two stage positive gear rotation structure is simple, durable and efficient.
Secondly, the fixed pulley is invented based on the mechanical formula. In formula M=F*L, when the force F is used as variable, the constant L of force arm is positively related to the moment M. That is, when the torque is amplified, the force arm is relatively constant, and it will save effort.
Then, the hand hoist is used to drive the arm zipper by manpower to produce the linear traction that matches the load. It acts on the transmission machinery composed of the gear and other parts. The small gear drives the large gear and passes the magnified torque out, in order to drive the lifting chain to complete the lifting operation of the heavy objects.
Finally, the manual hoist force is a manual manual hoist which is composed of a wheel shaft and a movable pulley, also called a magic gourd or a hand-held chain.