As we all know, screw elevator is developing fast and fast, and its application scope is becoming wider and wider, because it is not only small in size, light in weight, but also easy to use and install. It is often used in lifting links of mechanical equipment. It can be used in driving or multiple links, and its source is very many. Can be manual, can be directly connected to the motor, can also be directly connected to the motor, can also be connected to the reducer, planetary reducer and so on.