The car jack is placed in the car’s toolbox and is used to jack up the body when replacing the spare tire. Automobile jacks include pneumatic jacks, electric jacks, hydraulic jacks, and mechanical jacks. Hydraulic and mechanical jacks are commonly used. Car jacks are used to replace spare tires, which can be replaced easily if the tires are damaged when driving out.
One type of automobile jack: rack jack; it is composed of rack, gear, and handle, which rely on shaking the handle to make the rack rise and fall; this is also a type of automobile jack common to ordinary cars. It’s small and easy to store. But it is also because of this that it has limited its support weight.
Types of automobile jacks 2: hydraulic jacks; hydraulic jacks are divided into general hydraulic jacks and special hydraulic jacks. Its working principle is more complicated, so I won’t go into details here. The advantages of its use are fast lifting speed and greater load bearing capacity than rack jacks. But again, such a powerful jack is definitely not convenient to carry, so this is not a common type of car jack;
Types of automobile jacks 3: screw jacks; screw jacks rely on self-locking threads to support heavy objects. The structure is not complicated, but its support weight is large. However, the work efficiency of this kind of screw jack is slow, it rises slowly, and it falls quickly.
Four types of car jacks: inflatable jacks; this kind of jack may be a bit strange to everyone, because the type of car jack is not common. It relies on vehicle exhaust to inflate it, so the conditions of use are relatively special and little known.
Hydraulic There are vertical jacks and horizontal jacks: the advantages and disadvantages of vertical jacks: Pros: Lightweight and cheap Disadvantages: 1: No steel plate structure, just one oil pump, low safety 2: The lifting speed is slow and the height is not enough. 3: Oil pump is prone to oil leakage and short life 4: Because the body is relatively small, it is easy to sink on soft roads, affecting use. Machinery is also called scissors jack, scissors jack
Scissor jack Pros: Lightweight and cheap Disadvantages: 1: Mechanical principle It ’s too tiring to use, so it ’s hard to eat. Men use sweat all the time, and women even more. 2: Without a round top plate, the tires are easy to slip out. 3: Because it is not a high-quality steel plate, and it is small, it is easy to break and crooked neck. 4: The safety is too low, it often slips out easily, and it can hurt people if you are not careful.