How to replace the spiral spring on the car?

If the vehicle vibrates violently during slow driving and emergency braking, there is something wrong with the shock absorber. Remove the shock absorber, place it vertically, clamp the lower connecting ring in a vise, and pull and press the shock absorber rod several times. There should be steady resistance at this time. The resistance to pulling up should be greater than the resistance to pressing down. If the resistance is unstable or there is no resistance, it may be that the shock absorber is short of oil or the valve element is damaged, so it should be repaired or replaced. Stop after driving 10 km on the road with bad road conditions, and touch the shock absorber housing with your hands. If the temperature is not high enough, it means that there is no resistance inside the shock absorber and the shock absorber does not work. At this time, appropriate lubricating oil can be added before the test. If the shell is very hot, it means that the shock absorber is short of oil and needs to be replenished with enough oil; Otherwise, the shock absorber will fail.

The spring is deformed by external force. After the external force is removed, the spring can be restored. Many tools and equipment are reset by using the characteristics of springs. For example, the door hinges of many buildings are equipped with return springs. The door will automatically reset after people enter and leave. People also use this function to make automatic umbrellas, mechanical pencil and other products, which is very convenient. In addition, various buttons and keys also need return springs.

Mechanical clocks, clocks and watches, and clockwork toys are all driven by winding. When the spring is tensioned, it bends and deforms, and stores some elastic potential energy. After release, the elastic potential energy is converted into kinetic energy, which is driven by the transmission device to rotate. One of the characteristics of the spring is also used in toy guns, starting guns and military guns.

Observing various electrical switches, it will be found that one of the two contacts of the switch must be equipped with a spring to ensure that the two contacts are in close contact and conduct electricity well. If the contact is poor, the resistance at the contact will increase, and the heat generated when the current passes will also increase. In severe cases, the metal at the contact will melt. Many machines automatically supply bullets, and the bullets in automatic rifles are automatically loaded by the action of springs. In addition, the clips on ballpoint pens and pen covers are clamped on clothes through the fastening effect of springs, just like the clips on clothes.