The screw jack, also known as the screw transmission mechanism, is primarily used to convert rotational motion into linear motion or vice versa. There are types that focus on transmitting motion, such as the feed screw of machine tool tables, and others that adjust the relative positions of parts. Screw jacks are differentiated by sliding friction and rolling friction mechanisms. The sliding screw and nut mechanism is simple in structure, easy to process, and has a low manufacturing cost, featuring an automatic locking function, but it has a high friction torque and low transmission efficiency. The ball screw and nut mechanism, although more complex in structure and higher in manufacturing cost and not self-locking, boasts its significant advantages: low friction torque, high transmission efficiency, high precision, good system rigidity, reversible motion, and a long service life. The screw jack consists of a worm gear reducer and a screw, with the reduction component being the worm gear that drives the worm wheel to achieve reduction. The worm wheel is equivalent to the nut of the lifting screw and is matched with the lifting screw.