Can repair tires.
Tires
Introduction:
Tires are ring-shaped elastic rubber products that roll on the ground and are assembled on various vehicles or machinery. In 1845, R.w. Thomson, a civil engineer born in Scotland, invented the pneumatic tire and obtained a patent from the British government under the title "Improvement of Wheels for Carriages and Other Vehicles". On December 10 of the same year, the first pneumatic tire was born. Tires are usually mounted on metal rims, which can support the vehicle body, buffer external impacts, achieve contact with the road and ensure the vehicle's driving performance. Tires are often used under complex and harsh conditions. They are subject to various deformations, loads, forces, and high and low temperature effects when driving. Therefore, they must have high load-bearing performance, traction performance, and cushioning performance. At the same time, high wear resistance and flex resistance, as well as low rolling resistance and heat generation are also required. Half of the world's rubber consumption is used in tire production, which shows that the tire's ability to consume rubber is not trivial.
Function introduction:
Tires are one of the most important components of a car. Its main functions are: supporting the entire weight of the vehicle, bearing the load of the car; transmitting traction and braking. dynamic torque to ensure the adhesion between the wheels and the road; reduce and absorb the vibration and impact of the car when driving, prevent the car parts from being violently shaken and early damaged, adapt to the high-speed performance of the vehicle and reduce the noise during driving, ensuring driving safety, control stability, comfort and energy saving economy.
Classification introduction:
1. Car tires - tires installed on cars. They are mainly used for high-speed driving on good roads, with a maximum driving speed of up to 200 kilometers/ For more than 1 hour, it is required to have a comfortable ride, low noise, and good maneuverability and stability. Most tire structures adopt radial structures. They are divided into different series according to the driving speed requirements. Commonly found in standards and manuals are 95 and 88 series for bias tires, and 80, 75, 70, and 65 series for radial tires.
2. Light truck tires - usually 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 driven on highways, and the driving speed can generally reach 80-100km/h.
3. Truck and truck tires usually refer to rim diameters of 18-24 inches, cross-section width of 7 inches and Its tires include trucks, dump trucks, various special purpose and trailers, etc. The driving roads are relatively complex, ranging from good asphalt roads to poor gravel roads, dirt roads, mud roads, ice and snow roads, and even no road conditions. The driving speed generally does not exceed 80km/h.
4. Engineering machinery tires - Engineering machinery tires are installed on engineering machinery vehicles for specialized operations, such as loaders, bulldozers, excavators, land levelers, road rollers and stonework machines, etc. The driving speed is not high, but the road conditions and load performance used are demanding. Tires mainly use bias tire structure, but French companies such as Michelin (Cantonese pronunciation, called Michelin in Mandarin) also use radial structures. According to the classification of tire section width, it can be divided into two series: standard tires and wide-base tires.
5. Off-road vehicle tires - Off-road vehicles are front and rear wheel drive. Off-road vehicle tires are mainly driven on bad roads such as deserts, muddy fields, soft soil or other roads without pavement. The tires are required to have high passing performance. Off-road tires often use low air pressure, and some also use pressure-adjusted tires. According to the road conditions to adjust the tire pressure. In order to improve off-road passability, measures such as widening the tire section and rim width, and reducing the rim diameter are generally adopted to increase the ground contact area and reduce the ground contact pressure. In addition to the bias tire structure, the tire structure also uses a radial structure.
6. Agricultural and forestry machinery tires - Agricultural tires are mainly used on tractors, combine harvesters and agricultural machinery vehicles. Forestry machinery tires are installed on forestry tractors and forestry machinery to carry out forestry operations such as logging, gathering, shoveling and excavation.
The characteristics of these two types of tires are that they do not require high driving speeds, but their use conditions are harsh. They are often driven on poor field roads, hard stubble fields or gravel mountain roads, or even roads without pavement. The tires are easily scratched. or cut. Another feature is intermittent operation, short mileage, but long service life, so the tires are required to have good flex crack resistance and aging resistance. Tires are mainly bias-ply structures, but radial structures are also used.
7. Industrial vehicle tires - mainly used for pneumatic tires, semi-solid tires and solid tires on industrial vehicles. Divided into battery car tires, forklift tires and flatbed truck tires, etc.
8. Motorcycle tires - tires used on motorcycles. Including motorcycle tires, moped tires and small wheel diameter motorcycle tires.
9. Aviation tires - pneumatic tires used on aviation aircraft.
10. Special vehicle tires - including gun truck tires, tank tires, armored vehicle tires, desert tires, explosion-proof vehicle tires, etc.
11. Liqi tires - pneumatic tires for bicycles, tricycles and trolleys.
12. Electric vehicle tires - tires used on electric bicycles.