Combined non-pneumatic tire

Abstract

The invention discloses a combined flexible spoke non-pneumatic tire which comprises a tread, a combined support body, a combined outer rim, an inner rim and an adapter, the tread, the combined support body, the combined outer rim, the inner rim and the adapter are sequentially arranged from outside to inside in the radial direction of the tire; the combined support body comprises a lower arc, double arcs and an upper arc which are sequentially arranged from outside to inside in the radial direction of the tire; the combined outer rim and the inner rim comprise limiting clamping grooves and bolt holes; according to the combined non-pneumatic tire, the maintenance efficiency of the non-pneumatic tire is remarkably improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the design of tire structures, and particularly to a combined non-pneumatic tire, belonging to the field of automotive parts. Background Art

[0002] Traditional pneumatic tires require regular tire pressure maintenance, are prone to punctures and air leakage, and are likely to burst, causing traffic accidents. Pneumatic tires need to select appropriate materials to meet various usage requirements of the tires, and the materials do not have excellent environmental protection performance. In the military aspect, the disadvantage that traditional pneumatic tires cannot withstand weapon attacks can no longer meet people's requirements for various usage performances of tires. Therefore, major tire companies around the world have successively studied new types of tires. Among them, the most revolutionary in practice is the design, development, and application of non-pneumatic tires. It not only breaks the design process and concept of traditional pneumatic tires, improves the fuel economy, handling stability, and ride comfort of vehicles, but also effectively improves the impact of tire vibration on vehicle driving performance. At present, the production cost of non-pneumatic tires is high. For ordinary non-pneumatic tires, due to their one-piece molding, once the support structure is damaged, the entire tire needs to be replaced, resulting in a high usage cost. This combined non-pneumatic tire can effectively reduce the usage cost. When repairing the tire, only the damaged support unit needs to be replaced. This combined non-pneumatic tire can effectively improve the tire-changing efficiency, match various different-shaped supports, and enhance the universality of the wheel hub.

[0003] The combined support of the new combined non-pneumatic tire is made of thermoplastic polyurethane material, which has the advantages of high tear strength, high wear resistance, large load-bearing capacity, and long service life, and can better meet the usage requirements of automotive tires. Summary of the Invention

[0004] The technical problems to be solved by the present invention are as follows: After the non-pneumatic tire is damaged, only the damaged spoke support needs to be replaced, and the damaged tread needs to be repaired, so as to reduce the maintenance cost and resource waste; it is convenient to replace the tire, and only the combined support and the combined outer rim need to be disassembled.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A combined non-pneumatic tire, characterized in that it includes a tread, a combined support, a combined outer rim, an inner rim, and an adapter, which are arranged in sequence from inside to outside in the radial direction of the tire; the spoke support includes a lower arc, a double arc, and an upper arc, which are arranged in sequence from outside to inside in the radial direction of the tire. The thickness of the double arc part of the spoke support unit is 8 mm to meet the tire sinking requirement; the thickness of the lower arc part of the spoke support unit is 5 mm, and a polyurethane material shear layer with a thickness of 20 mm is added. The lower surface of the lower arc part of each support unit is fixed to the inner surface of the shear layer through an adhesive to increase the longitudinal stiffness of the tire and avoid movement interference.

[0007] Furthermore, the tread is made of rubber material.

[0008] Furthermore, the spoke support and the inner rim are made of high-modulus thermoplastic polyurethane material.

[0009] Furthermore, each spoke support is used as a structural unit, and its annular arrangement is such that 18 structural units with an angle of 20° each are annularly arrayed around the axis of the combined flexible spoke non-pneumatic tire.

[0010] Furthermore, for the spoke support, the distance and angle between the double arcs are determined through parametric structural design and finite element analysis and optimized to be rounded corners with a radius of 2 mm and a central angle of 120°, which can effectively avoid mutual shearing of the double arcs while ensuring strength.

[0011] Furthermore, the tread and the spoke support are connected together by means of a compression molding and vulcanization process.

[0012] Furthermore, each section of the spoke support is bonded with polyurethane glue.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] (1) By redesigning the structure of the non-pneumatic tire, the present invention has great strength, strong integrity and toughness, and superior shock absorption and load-bearing performance of the non-pneumatic tire under different speed driving conditions. There are 18 spoke supports arranged annularly around the axis, and the cavities of the support units have the functions of drainage, heat dissipation and lightweight. The combined flexible spoke spoke support is made of a thermoplastic polyurethane elastomer with a relatively high modulus, having the properties of high hardness, anti-fatigue, high elongation rate, high strength, strong load-bearing capacity, as well as excellent shock absorption characteristics, temperature resistance and flame resistance characteristics, radiation resistance, oil resistance and chemical resistance characteristics. The tread is made of a low-modulus rubber material, having the properties of wet skid resistance, wear resistance and adapting to different complex driving conditions. The combined flexible spoke non-pneumatic tire has the characteristics of puncture resistance and explosion-proof.

[0015] (2) The combined spoke support is composed of 18 identical support units. When a support is damaged, it can be repaired by replacing the damaged unit alone, thereby reducing the maintenance cost and saving resources. During the production process, the problem of the entire tire being scrapped due to defects can also be avoided. The supports are bonded with polyurethane glue, increasing the overall strength of the tire; eliminating the gaps between the supports and avoiding mutual shearing between the supports during driving.

[0016] (3)It is obtained through finite element simulation analysis that the shape of the contact patch of the combined flexible spoke non-pneumatic tire is similar to a rectangle. As the load increases, the contact width remains basically unchanged, while the contact length and contact area increase. The contact area of the combined flexible spoke non-pneumatic tire in the free rolling state is increased compared to that of the traditional pneumatic tire of the same specification, and the contact area during acceleration and braking is also increased. The grip performance of the combined flexible spoke non-pneumatic tire is improved, the uniformity of the contact distribution of the non-pneumatic tire is improved, and the wear resistance is enhanced; the unique structure of the combined flexible spoke support body of the non-pneumatic tire greatly improves the shock absorption characteristics of the non-pneumatic tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall tire structure;

[0018] Figure 2 is a schematic diagram of the combined support body unit;

[0019] Figure 3 is a schematic diagram of the overall combined non-pneumatic tire with multiple support body structures; SPECIFIC IMPLEMENTATION MODE

[0020] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0021] As Figure 1 shown, the combined non-pneumatic tire includes a tread 1, a combined support body 2, a combined outer rim 3, an inner rim 4, and an adapter 5, which are arranged in sequence from the outside to the inside in the radial direction of the tire. Among them, the tread and the combined support body are bonded together by polyurethane glue. Each support body and the outer rim are used as a structural unit, and their arrangement is a circular arrangement. The angle between adjacent structural units is 20°, and 18 structural units are circularly arrayed with the tire axis as the center. Adjacent support body units are combined by polyurethane glue. The inner rim 4 and the adapter 5 are connected by bolts; the adapter 5 is connected to the axle, and the type of the adapter is determined by the axle.

[0022] As Figure 2 shown, the support body unit includes a lower arc 21, a double arc 22, and an upper arc 23, which are arranged in sequence from the outside to the inside in the radial direction of the tire. The lower arc 21, the double arc 22, and the upper arc 23 all have dimensional requirements to reduce the interference between the support bodies while meeting the strength requirements; each support body unit is combined with the outer rim unit through an adhesive, and the outer rim unit is combined with the bolts 42 and the limit blocks 41 of the inner rim 4 through bolts 32 and slides 31.

[0023] As Figure 3As shown, the combined non-pneumatic tire can be replaced with various types of combined supports, which are double-arc type, X type, and honeycomb type from left to right in the figure. In actual use, different supports can be quickly replaced to meet the usage requirements, reduce the amount of spare tires carried, and increase the vehicle's adaptability to the road surface; without replacing the inner hub, the same type of hub can match more types of vehicles, making the parts more general.

[0024] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A combined flexible spoke non-pneumatic tire, characterized in that: The invention comprises a tread (1), a combined support body (2), a combined outer rim (3), an inner rim (4) and an adapter (5), which are arranged in sequence from the outside to the inside in the radial direction of the tire; the tread (1) and the combined support body (2) are bonded together by polyurethane glue; the combined support body (2) and the combined outer rim (3) are characterized in that each support body and the outer rim are arranged as a structural unit in an annular arrangement, the angle between adjacent structural units is 20 degrees, and 18 structural units are arranged in an annular array with the tire axis as the center, and adjacent support body units are bonded by polyurethane glue; the support body unit The invention relates to a tire, characterized in that the support body unit comprises a lower arc (21), a double arc (22) and an upper arc (23), which are arranged in sequence from the outside to the inside in the radial direction of the tire, and the lower arc (21), the double arc (22) and the upper arc (23) all have size requirements, which can reduce the interference between the support bodies while meeting the strength requirements; each support body unit is combined with the outer rim unit by an adhesive, and the outer rim unit is combined with the bolts (6) and the limit block (41) of the inner rim (4) by bolts (6) and a slideway (31); the inner rim (4) and the adapter (5) are connected by bolts, and the adapter (5) is fixed to the axle by bolts.

2. A combined non-pneumatic tire according to claim 1, characterized in that: The combined support body (2) may have an X-shaped structure, a honeycomb-shaped structure, or the like.

3. A combined non-pneumatic tire according to claim 1, characterized in that: The tread (1) is made of rubber material; the combined support body (2) and the combined outer rim (3) are made of thermoplastic polyurethane material; and the inner rim and the adapter are made of aluminum alloy material.

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