Working principle of hand-cranked hoist

Working principle of the hand-cranked hoist:
Hand-cranked hoists play multiple roles in construction environments, often serving as versatile tools for loading, unloading, and installing small equipment, components, and pipelines. Their working principle relies on two pairs of smoothly self-locking clamps, which act like strong steel claws, alternately gripping steel wire ropes and performing linear back-and-forth movements to achieve traction. Whether in horizontal, vertical directions, or in sloping, rugged, narrow alleys, or twisting and turning work environments, hand-cranked hoists can operate flexibly and even function in environments without power supply.