A tire is a ground-rolling, circular-ring elastic rubber product assembled on various vehicles or machinery. Usually mounted on metal rims, it can support the vehicle body, cushion external impacts, achieve contact with the road surface, and ensure the driving performance of the vehicle. Tires are often used under complex and harsh conditions. They must withstand various deformations, loads, forces, and high and low temperatures during driving. Therefore, they must have high load-carrying performance, traction performance, and cushioning performance. At the same time, high abrasion resistance and flex resistance are required, as well as low rolling resistance and heat generation. Half of the world’s rubber consumption is used for tire production, showing the ability of tires to consume rubber.
Car tires-tires installed on cars. It is mainly used for high-speed driving on good roads. The maximum driving speed can reach 200 kilometers per hour or more.
Light-duty truck tires—generally refers to truck tires with a rim diameter of 16 inches or less and a cross-section width of 9 inches or more. This type of tire is mainly used on highways, and its driving speed can generally reach 80 ～ 100km / h.
Truck and bus tires generally refer to tires for trucks, dump trucks, various special and trailer tires with a rim diameter of 18 to 24 inches and a section width of 7 inches or more. Its driving roads are more complex, with good asphalt roads and poor gravel roads, dirt roads, muddy roads, ice and snow roads, and even road conditions.
Construction machinery tires-Construction machinery tires are mounted on special-purpose construction machinery vehicles, such as loaders, bulldozers, excavators, levelers, road rollers, and stone working machines. The driving speed is not high, but the road conditions and load performance used are demanding.
Agricultural and forestry machinery tires-Agricultural tires are mainly used on tractors, Combein combine harvesters and agricultural machinery vehicles. Forestry machinery tires are mounted on forestry tractors and forestry machinery for forestry logging, skidding, shovel and excavation. These two types of tires are not required to travel at high speeds, but they are used in harsh conditions. They often travel on poor field roads, hard stubble fields or stone roads, and even roads without roads. The tires are easily scratched. Or cut. Another feature is the intermittent operation and short mileage, but the long service life, so the tire is required to have good resistance to flex cracking and aging resistance. Tires are mainly skewed, but they also use a radial structure.
Industrial vehicle tires-Pneumatic tires, semi-solid tires and solid tires mainly used in industrial vehicles. Battery car tires, forklift tires and flatbed tires.
Motorcycle tires-tires used on motorcycles. Includes motorcycle tires, moped tires, and small wheel motorcycle tires.
Aviation tires-pneumatic tires used in aviation aircraft.
Special vehicle tires-including gun tires, tank tires, armored vehicle tires, desert tires, explosion-proof vehicle tires, etc.
Rally tires-pneumatic tires for bicycles, tricycles and pushcarts.
Electric vehicle tires-tires used in electric bicycles.
According to the structural design Divided into diagonal tires, radial tires. The fundamental difference between radial and diagonal tires lies in the carcass. The carcass of a diagonal tire is a diagonal ply; the carcass of a radial tire is a polymer multi-layer cross material. The top layer is several layers of steel cord cord made of steel wire, which can reduce the puncture of the tire by foreign objects. Odds.
The cords of diagonal tires are arranged according to the diagonal crossing, hence the name. The characteristic is that the strength of the tread and the sidewall is large, but the stiffness of the sidewall is large, and the comfort is poor. Due to the large movement and friction between the plies at high speed, it is not suitable for high speed driving. With the continuous improvement of radial tires, bias tires will be basically eliminated.
Compared with ordinary diagonal tires, radial tires have greater elasticity, good wear resistance, small rolling resistance, good adhesion, good cushioning performance, large load capacity, and difficult to puncture; the disadvantage is that the tire side is easy to crack, due to the large lateral deformation As a result, the lateral stability of the car is slightly worse, the manufacturing technology is high, and the cost is higher.
1. Support the full weight of the vehicle, bear the load of the vehicle, and transmit forces and moments in other directions;
2. Transmission of traction and braking torque to ensure good adhesion between the wheel and the road to improve the vehicle’s power, braking and passing properties; work with the vehicle suspension to alleviate the impact of the vehicle while driving, And attenuate the resulting vibrations;
3. Prevent the automobile parts from being subject to severe vibration and early damage, adapt to the high-speed performance of the vehicle and reduce the noise during driving, and ensure driving safety, handling stability, comfort and energy saving economy.