If the jack is subdivided, it should be divided into several types. However, if it is only differentiated from the working principle, the jack is mainly divided into mechanical jack and hydraulic jack. Today, we will focus on introducing the mechanical jack.

Our so-called mechanical jacks are usually screw jacks, but not all mechanical jacks must be screw jacks. First of all, we want to understand the concept of mechanical jack. The so-called mechanical jack does not need to rely on the output of hydraulic oil as the source of power, but relies on the interaction between machines and mutual transmission to complete.

Screw jack, scissor jack and rack jack are all mechanical jacks. Screw and scissor jack increase torque through the transmission of screw rod, but screw jack is vertical screw rod, scissor jack is horizontal screw rod. The rack jack completes transmission through the interaction between gears. All three are transmission between mechanical components, which is the definition of mechanical jack.