Tire is a round elastic rubber product that is assembled on various vehicles or machinery and rolls on the ground. 1845, R·w· Thomson, a Scottish-born civil engineer, invented pneumatic tires, and obtained a patent from the British government. The patent name was "Wheel Improvement of Carriage and Other Vehicles".
The first pneumatic tire was born in February 10 of the same year. Tires are usually installed on metal rims, which can support the car body, buffer external shocks, achieve contact with the road surface and ensure the driving performance of the vehicle.
Tires are often used in complex and harsh conditions. They are subjected to various deformations, loads, forces and high and low temperatures during driving, so they must have high bearing performance, traction performance and cushioning performance.
At the same time, it also requires high wear resistance and bending flexibility, as well as low rolling resistance and heat generation. Half of the world's rubber consumption is used for tire production, which shows that the ability of tire to consume rubber is no small matter.
In early pneumatic tires, the carcass was coated canvas. Because the longitudinal and transverse lines of canvas cross each other, the lines rub against each other because of tire deformation when walking; This is easy to wear off the line, and the tire can only run 200-300km at this time.
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.