A hand-cranked winch crane, usually referred to as a hand-cranked winch or a hand-cranked winch, is a simple lifting device that drives a gear set by a hand crank to pull or lift heavy objects. It does not require electric or hydraulic drive, and its core value lies in using human power to achieve several times or even dozens of times the pull force. 

How does it work? 

Its working principle is based on the gear reduction mechanism and the self-locking brake system. You can think of it as a power amplifier：

·Labor-saving principle: The hand crank drives a small gear, and the small gear then drives the large gear connected to the reel. This combination of large and small gears forms a powerful mechanical gain system. Therefore, even if a person exerts a force on the handle, hundreds of kilograms of tension can be generated on the wire rope. · Safety self-locking: Most hand-cranked winches are equipped with ratchet pawls or automatic load holding brakes. When you stop shaking, the brakes will automatically lock immediately to prevent heavy objects from slipping and ensure safety.