Structure and Working Principle of Hand cranked Screw Lift

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The hand cranked screw lift is mainly based on the lever principle and human input, and 

its working

 principle is mainly:

By rotating the handwheel, human input is transmitted to the lifting device, and the screw pushes the 

nut up or down through the threaded hole of the nut, thereby raising or lowering the lifting platform. 

The direction of rotation of the screw determines the direction of movement of the nut, and the faster

 the rotating handle, the faster the lifting platform rises or falls.

Hand cranked screw lift movement mode:

When the hand cranking device is operated, the rotation of the handwheel is transmitted to the screw

 through the transmission system. The nut will move along the spiral path of the screw, thereby driving

 the lifting of the lifting platform. According to the spiral direction of the screw and nut, two different 

motion modes can be achieved: raising and lowering. When the screw rotates clockwise, the nut moves

 upward along the screw, and the lifting platform rises accordingly; On the contrary, when the screw

 rotates counterclockwise, the nut moves downwards along the screw, and the lifting platform descends

 accordingly