Hydraulic jacks are very common, do you understand the principle?
In a balanced system, the smaller piston exerts less pressure and the larger piston exerts more pressure, keeping the fluid at rest. Therefore, through the transmission of liquid, different pressures on different ends can be obtained, so that a transformation can be achieved.
Let's take a look at the working principle of the hydraulic jack through a short video.
mechanical jack
The mechanical jack pulls the handle back and forth, pulls out the pawl to push the ratchet to rotate, and the small bevel gear drives the large bevel gear to rotate the lifting screw, so that the lifting sleeve can be lifted or lowered to achieve the function of lifting force.
scissor jack
This kind of mechanical jack is relatively small and is often used in life, and its strength is definitely not as strong as that of hydraulic jacks. In fact, we often see a mechanical jack in life, which we call a scissor jack.
picture
It just shakes the handle back and forth to make the top move up and down, which is easy to understand.
Let me show you another very interesting jack: the inflatable jack.
