The earliest tires were made of wood, which can be seen from the ancient chariots in China and the gentry carriages abroad. Tire photo album (20 photos) Later, explorer Columbus explored the New World for the second time in 1493- 1496. When he arrived at Haiti Island in the West Indies, he found the rubber pimples that local children were playing with, which surprised him. Later, he brought this wonderful thing back to the motherland. After several years, rubber was widely used, and the wheel gradually changed from wood to hard rubber. But at this time, the rubber tire is still solid, and it is still very uncomfortable and noisy to walk. It was not until 1845 that R·w· Thomson, a Scottish-born civil engineer, invented pneumatic tires and obtained a patent from the British government on the topic of "wheel improvement of vehicles such as carriages". The first pneumatic tire was born in February 10 of the same year. The first person to buy pneumatic tires was named Li Luo, a nobleman. The total price of the four tires is 44 pounds and 2 shillings. 1847, Scientific American magazine introduced Thomson's pneumatic tire, calling it an epoch-making improvement. However, Britain at that time paid too much attention to the traditional middle class. In order to protect cars and limit the development of steam cars, the speed of cars is limited to 2 miles per hour (about 3.2 kilometers) in urban areas and 4 miles per hour (about 6.4 kilometers) in suburbs. In this way, Thomson's invention has no market, and it is slowly forgotten by people. That is to say, Thomson's first tire revolution did not bring the same light as the sun to mankind, because the darkness that human beings should experience seems to be not over yet. But the sun will always come out, because human beings and everything need it. More than 40 years later, in 1888, Deng Lupu, an Irish doctor of medicine, obtained the patent of pneumatic tire. At that time, Johnny, the son of Mr. J·B· Deng Lupu, who was 10 years old, bought a three-wheeled bicycle, but because the tires at that time were all solid tires made of hard rubber, it was very uncomfortable to walk on the stone road. His son's complaint inspired Mr. Deng Lupu, so the pneumatic tire that had been forgotten for more than 40 years came out again. With the progress of the times, the pneumatic tire invented by Mr. Deng Lupu was quickly applied to bicycles and quickly entered the automobile field, contributing to the development of the world automobile industry.

pneumatic tyre

Early pneumatic tires used rubber-coated canvas as the carcass, because the longitudinal and transverse lines of the canvas crossed each other, and the tire deformation caused the lines to rub against each other when walking, which made the lines easily worn off. At this time, the tires can only run 200-300 kilometers. 1903, Mr. J. F. Palmer invented twill textiles, which promoted the development of cross-ply tire and made the tire life take a big step forward. Because the carcass of the fork will no longer be rubbed by the running of the tire, the cord is not easy to be worn off, so the service life is greatly prolonged. Michelin made the first tubeless tire at 1930; 1946, invented the world-famous radial tire. Therefore, the development of tires has gone through a long process. In this long night, I don't know how many generations have paid hard work and superb wisdom for this.

Edit the function of this tire.

Tire is a kind of product, it is a high-tech composite product, it contains about 20 kinds of ingredients, and consists of more than 200 different materials and products; Tire is also a kind of culture, which contains human intelligence and wisdom; Tire is a kind of safety, which is related to everyone's life safety in the automobile age. It is a consumer product that you and I must treat with caution. But in the final analysis, tires are for cars. Tire is one of the most important parts in a car. Its main functions are: supporting the overall weight of the car and bearing the load of the car; Transfer traction and braking torque to ensure the adhesion between the wheel and the road surface; Lighten and absorb the vibration and impact when the car is running, prevent the early violent vibration and damage of the car parts, adapt to the high-speed performance of the car and reduce the noise when driving, and ensure the driving safety, handling stability, comfort and energy saving and economy.

Edit the tire composition in this paragraph.

Longitudinal tread tire

A tire usually consists of three parts: outer tire, inner tube and cushion belt. There are also those that don't need inner tubes, and the inner layer of the carcass has a rubber layer with good air tightness, which requires special rims. Tire structures all over the world are developing in the direction of tubeless, radial structure, flattening (small aspect ratio of tire section) and lightweight.