How jacks work

Reading: There are car owners of friends, some of the superb technology will repair their own problems, their own tires will use jacks, of course, the safest way is to go to 4s store slightly, the following is the working principle of the jack.

Jacks are generally divided into hydraulic jacks, rack jacks, screw jacks and inflatable jacks. There are special support points for supporting jacks at the bottom of the car body. The support point of a family car is usually on the inside of the side skirt.

The working principle of the jacks is different. The basic principle on which the hydraulic transmission is based is the Pascal principle. That is to say, the pressures across the liquid are consistent, so that in a balanced system, the pressure exerted on the relatively small piston is compared. Small, large pistons exert greater pressure, which keeps the liquid still. Therefore, different pressures on different ends can be obtained through the transfer of liquid, so that a change can be achieved. The hydraulic jack that we usually use is to use this principle to achieve the transmission of force. The mechanical principle of the screw jack reciprocates the handle, the claws push the ratchet wheel to rotate, the small bevel gear drives the large bevel gear, and the weight lifting screw rotates, so that the lifting sleeve can be lifted or lowered, and the lifting pulling function can be achieved. . But not as easy as hydraulic jacks.