The working principle of Jack is widely used in work

Principle of hydraulic jack

In a balanced system, the pressure exerted by the smaller piston is relatively small, while the pressure exerted by the larger piston is also relatively large, which can keep the liquid static. Therefore, through the transmission of liquid, different pressures on different ends can be obtained, so as to achieve the purpose of a transformation.

Mechanical jack

The mechanical jack pulls the handle back and forth, pulls out the claw, that is, it pushes the ratchet clearance to rotate, and the small bevel gear drives the big bevel gear to rotate the lifting screw, so that the lifting sleeve can be lifted or lowered to achieve the function of lifting tension.

Scissor jack

This kind of mechanical jack is relatively small, which is often used in life, and its strength is certainly not as strong as that of hydraulic jack. In fact, we often see a kind of mechanical jack in life, which is called scissors jack. It is light and fast to use. It is an on-board product of major automobile manufacturers in China.

The utility model is composed of an upper supporting rod and a lower supporting rod made of metal plates, and the working principles are different. The cross section of the upper support rod and the cross section of the lower support rod at the tooth and its adjacent part are rectangular with one side opening, and the metal plates on both sides of the opening are bent inward. The teeth on the upper support rod and the lower support rod are made of metal plates bent on both sides of the opening, and the tooth width is greater than the thickness of the metal plate.