​How to Use Household Vehicle Jack Correctly

Cars in the convenience of people's day, but also brought some dangers, so travel is the most important, in people's travel, car carrying things are indispensable, in the event of emergencies car owners can solve some minor problems. Below to explain the use of household car equipment several common jacks.
 Generally speaking, jacks are used when replacing tires and checking the chassis of vehicles. They can be divided into rack jacks, screw (mechanical) jacks, hydraulic (hydraulic) jacks and pneumatic jacks.           
 This is the most common jacking method in household cars. Manpower drives the rack to lift weights through lever and gear. There are two kinds of jacks, one is herringbone and the other is rhombus. Their advantages are light weight, small folded volume and good storage. Helical jacks are used to support heavy objects by the self-locking effect of threads. Advantages: This kind of Jack is simple in structure, reliable in life and has a relatively large load-bearing component. Defects: however, this kind of jacks are widespread in self-weight and low in transmission power. The journey is slow.           
 This kind of jack using oil pressure to lift is more time-saving and labor-saving. The principle is to manually press the oil in the oil storage chamber into the cylinder through a one-way valve to lift weights. Advantages: the speed of lifting and lowering is very fast, and the maximum load is very large, about 3 tons. Defects: But the volume of this kind of Jack is more important than the above two kinds of jacks. It is much larger and inconvenient to carry, so it will not appear in the boxes of household cars basically. If there is demand, it can only be done by itself.
 Now let's talk about the precautions for using the household car jack.            

 Handbrakes are pulled up by manual gearbox, and the gearbox is put into gear 1 or reverse together (don't forget  when starting again); automatic gearbox is also pulled up by hand brake, and the gearbox is put into gear P position together. The jack is put under the car for lifting operation.
 Because the jack of a family car usually supports a wheel alone, if it is parked on the sloping ground, the relative position of the jack and the body may change after the jack is raised. On the sloping slope with a larger viewpoint, the change of the viewpoint will be greater, simple slippage or damage. If the defective address happens to be on the slope, it is advocated. Clamp the wheels with bricks or wood to prevent them from sliding.           
 The Jack must be used on the solid and flat road surface. If it is on the soft ground, such as mud road or sand road, it is advocated to use wooden or stone pad under the jack before using the jack to reduce the pressure so as to prevent the jack from falling into the soft ground.            

 When using the jack, we must pay attention to the special support point of the chassis. The support point of the family car is usually on the inside of the skirt on the side, just like the two fins on both sides of the chassis. It is about 20 centimeters behind the front of the front wheel and about 20 centimeters ahead of the rear wheel. This fin is protruded from the chassis steel plate and can accept relatively large ones. Pressure. If not operated according to the correct method, supporting the jack on the steel plate of the chassis may cause unnecessary harm to the chassis, and other support on the suspended pendulum arm is also incorrect operation. If the jack slips and the vehicle falls down, the chassis and the jack will be harmed.