RU167208U1 - AIRLESS TIRE WITH MECHANICAL RIGIDITY ADJUSTMENT - Google Patents

Abstract

Traction wheel equipped with an airless tire made of elastic material with elastic deformable spokes connecting the outer ring with the tread and the inner ring mounted on the metal rim of the wheel, and the tread is made of elastomer with the addition of powder to improve adhesion to the supporting surface, characterized in that the spokes are made in three rows with a width that provides uniform radial stiffness and strength of the tire, with the middle row at one end attached to the coupling mounted with ozhnostyu rotation around the wheel axis at an angle of not more than 15º with respect to the remaining rows, with the average number of the spokes are angled relative to the side, forming a crisscrossing structure, which, when the coupling rotation is able to change the stiffness characteristics.

Description

Airless tire with mechanical stiffness control

The solution relates to the field of transport engineering, in particular to the design of airless tires with elastic deformable spokes.

Currently known designs of airless tires made of elastic polyurethane with elastic deformable knitting needles [1, 2, 3].

The structural bearing tire [1] includes a tread portion coming into contact with the ground, a reinforced annular belt located radially from the inside of the tread portion, and a plurality of jumper spokes extending in the transverse direction and radially inward from the reinforced annular belt and attached to the wheel or hub.

A disadvantage of the known design is the lack of a device for changing the deformation characteristics of jumper spokes and a constant value of tire stiffness.

The wheel [2] consists of inner and outer rims, interconnected by elastic elements arranged in two rows. Elastic knitting needles are made of polyurethane of variable thickness, gradually decreasing from the edges to the middle. The width of the cross section of the spokes is in the form of an annular sector or crescent, together with the outer and inner rims form an annular profile in the transverse plane of the wheel.

The disadvantage of the technical solution is that the configuration of the elastic elements provides a constant value of the radial, tangential, lateral and angular stiffnesses of the tire.

The closest of these analogues is the patent No. 2397977RF [3]. The tire [3] is made of elastic polyurethane with elastic deformable spokes that connect the outer ring to the tread and the inner ring fixed to the metal rim of the wheel. The tread is made of elastic polyurethane with the addition of a powder of material that improves adhesion to the road surface.

The main drawback of the tire design [3] is the inability to adjust the stiffness characteristics during operation, and, therefore, to change the area of the contact spot with the supporting surface.

The task to which the claimed technical solution is directed is to increase the reference patency and reduce fuel consumption of wheeled transport and technological vehicles.

The technical result is a decrease in the coefficient of rolling resistance and a decrease in tire pressure on the supporting surface.

The technical result is achieved by the fact that in the traction wheel equipped with an airless tire made of elastic material, elastic deformable spokes connecting the outer ring with the tread and the inner ring mounted on the metal rim of the wheel, and the tread is made of elastomer with the addition of powder to improve adhesion with a supporting surface, made in three rows, with a width providing uniform radial stiffness and strength of the tire, moreover, the middle row is attached at one end to the coupling constant with the possibility of incremental rotation about a wheel axis by an angle not exceeding 15 degrees with respect to the remaining rows. When turning counterclockwise, additional tension of all the spokes occurs, thereby stiffening the tire discretely, which leads to a decrease in the coefficient of rolling resistance. When turning the coupling of the hourly hand, the tension of the spokes decreases, as a result, the stiffness decreases stepwise and the area of the contact patch of the tire increases, thereby reducing pressure on the bearing surface. In this case, the middle row of needles are directed at an angle relative to the side, forming a crossover structure.

The invention is illustrated by drawings, which depict:

In FIG. 1 - traction wheel assembly with a tire with elastic deformation spokes from elastomer;

In FIG. 2 - tire cross-sectional profile with mechanical stiffness adjustment.

The airless tire is attached to the metal rim of the wheel 1 due to the high adhesive properties of the elastomer and is an outer 2 with a tread 3 and an inner 4 ring, which are interconnected by elastic deformable spokes. The spokes are made in three rows, the spokes 5 are fixed relative to the wheel, in contrast to the spokes 6, which are connected to a stiffness adjustment sleeve 7, mounted for rotation relative to the metal rim 1.

The device operates as follows, under the load of the vehicle, elastic deformable spokes 3 and 4, located outside the sector above the contact spot, experience tensile forces, and the rest are compressed. When the stiffness adjusting coupling 7 is rotated, an additional tension or weakening of the spokes 5 and 6 occurs, as a result of which the tire stiffness over the entire volume changes.

The advantages of this device are that, in addition to eliminating the possibility of puncture, as well as subsequent destruction of the tire, it can improve the support patency on weakly bearing surfaces of movement, as well as reduce fuel consumption when moving on hard surfaces, which increases the mobility and efficiency of transport - technological machines.

Information sources

1. Patent No. 2269425 of the Russian Federation Non-pneumatic tire / Societe De Technology Michelin (Fr), Michelin Reshers E Technic SA (ch), Ryan Timothy B. (Us), Thompson Ronald H. (Us), Cron Stephen M. (Us), Demino Kenneth W. (Us) - Priority from 08.24.2001

2. Patent No. 2336178 of the Russian Federation. Wheel of a vehicle with elastic spokes / Bratsk State University, V.V. Mazur - Priority of 02.27.2007.

3. Patent No. 2397877 of the Russian Federation Automobile tire made of elastic polyurethane with elastic deformable knitting needles / Bratsk State University, V.V. Mazur, - Priority dated 07/08/2009

Claims (1)

Traction wheel equipped with an airless tire made of elastic material with elastic deformable spokes connecting the outer ring with the tread and the inner ring mounted on the metal rim of the wheel, and the tread is made of elastomer with the addition of powder to improve adhesion to the supporting surface, characterized in that the spokes are made in three rows with a width that ensures uniform radial stiffness and strength of the tire, with the middle row at one end attached to the coupling mounted with ozhnostyu rotation around the wheel axis at an angle of not more than 15º with respect to the remaining rows, with the average number of the spokes are angled relative to the side, forming a crisscrossing structure, which, when the coupling rotation is able to change the stiffness characteristics.

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