Content
Arched tires are a type of special tubeless automobile tires with a profile in the form of an arch of considerable width [1] [2] [3] . Their main purpose is to increase the patency of vehicles when driving on soils with low bearing capacity (sands, wetlands, virgin snow, etc.) [1] .
General Description
A typical arched tire has a cross section in the form of an arch with variable curvature and low sides [2] . The ratio of the height of the profile of the arch tire to its width is in the range of 0.35-0.5; the profile width is 2.5-3.5 times greater than that of a conventional tire [2] . The frame of the arch tires is made of polyamide cord, strong and thin layer, with low bending resistance, as a result, the magnitude of the radial deformation of the arch tires is about 2 times higher [2] . The internal pressure is 0.005-0.15 MPa [2] .
As a rule, such tires are equipped with rarely planted powerful involute- shaped lugs over the entire profile width [1] [2] . Their total area can be about 17–35% of the total support area, the height can reach 35–40 mm, and the pitch between them is 100–250 mm [2] . In the central part of the tread pattern along the tire circumference there is a special belt consisting of one or several rows of lugs, the purpose of which is to reduce tire wear when driving on paved roads [2] .
Large width, high lugs, low pressure and elasticity of the arch tire contribute to the formation of a large contact area with the supporting surface area [2] . In addition, when rolling, such a tire has the property of compacting the soil towards the center of the contact zone, which in total gives a small specific pressure on the soil, low rolling resistance and the achievement of large values of the tensile moment on a soft surface [2] .
History
Developed in 1952 by Nicholas Straussler in the UK [4] [5] .
Application
Arched tires are used as a seasonal means of increasing patency; they are mounted only on the rear axles of trucks, one at a time instead of two conventional tires, which dramatically increases the ability of the equipment to overcome areas of soft soil [1] [3] .
The use of arch tires on roads with ordinary hard surface is highly discouraged [1] . When operating in mixed road conditions, the average resource of arched tires reaches 40–45 thousand km, and when driving on ordinary roads it decreases to 20–30 thousand km. [2] [3]
Notes
- ↑ 1 2 3 4 5 Section "Arched tires" in the chapter "Types and purpose of tires" // Brief automobile reference / State. Research Institute of Automotive transp .. - Ed. 8th, rev. and additional .. - Moscow: Transport, 1979. - S. 350. - 464 p.
- ↑ 1 2 3 4 5 6 7 8 9 10 11 Vishnyakov N.N., Vakhlamov V.K., Narbut A.N. et al. Wheels // Automobile: fundamentals of construction. - Ed. 2nd, rev. and additional .. - Moscow: Engineering, 1986. - S. 178-179. - 304 p.
- ↑ 1 2 3 Ivanov I. Arched tires // Car tires: yesterday, today, tomorrow .... - Infra-Engineering, 1979. - P. 350.
- ↑ THE STRAUSSLER- “LYPSOID” TIRE
- ↑ Putin V.A. Automobile wheels with arch tires : (Design, research results, operational features) .— [Chelyabinsk]: South Ural. Prince Publishing House, 1968. — 163 pp.
Further reading
- Pliev I.A., Saykin A.M., Arkhipov A.V. Tire sizes for motor vehicles of northern performance (Russian) // Engineering: electronic journal. - 2012. - April ( No. 04 ). - S. 1-15 .
Links
- Karasev A. Tires for fields (Development of arched tires in the US) . Information site www.os1.ru. Date of treatment October 19, 2016.
- Chassis . Information site tezcar.ru . Date of treatment October 19, 2016.
- Means of increasing the patency of cars in winter Information site ustroistvo-avtomobilya.ru . Date of treatment October 19, 2016.
- Archive TV movie "Arched Tires"
- Video showing off-road capabilities of the GAZ-66 with arch tires