Non-pneumatic tire and vehicle

Abstract

A non-pneumatic tire comprises a negative Poisson's ratio unit arranged on a tire side wall, the negative Poisson's ratio unit is annular, the negative Poisson's ratio unit comprises first open holes and second open holes which are formed by hollowing out the tire side wall in the Y direction, the first open holes and the second open holes are alternately formed in the negative Poisson's ratio unit at intervals, and the first open holes and the second open holes are communicated with the negative Poisson's ratio unit. The first open hole and the second open hole are each in an isosceles triangle shape, the bottom edge of the first open hole is close to the outer ring of the negative Poisson's ratio unit and away from the inner ring of the negative Poisson's ratio unit, and the bottom edge of the second open hole is close to the inner ring of the negative Poisson's ratio unit and away from the outer ring of the negative Poisson's ratio unit. And the opening size of the first opening is smaller than that of the second opening.

Description

Technical Field

[0001] The utility model relates to the technical field of tires, in particular to a non-pneumatic tire and a vehicle. Background Art

[0002] A non-pneumatic tire is a tire that uses solid materials instead of pneumatic carcasses, usually tubeless tires. Currently, common non-pneumatic tires are usually formed as a whole using solid materials, and most of them are solid or have a few holes in the structure, which has poor ride smoothness and comfort. When the load or speed is large, the deformation amplitude of non-pneumatic tires is large, the stress concentration phenomenon is serious, the elastic deformation and fatigue strength of its supporting components increase, which easily leads to rubber aging and damage, and the product life is generally short. Summary of the invention

[0003] The utility model provides a non-pneumatic tire with high strength and durability, comprising a negative Poisson's ratio unit arranged on a sidewall, the negative Poisson's ratio unit is annular, the negative Poisson's ratio unit comprises a first opening and a second opening formed by hollowing out the sidewall along the Y direction, the first opening and the second opening are alternately arranged at intervals on the negative Poisson's ratio unit, the opening shapes of the first opening and the second opening are both isosceles triangles, the bottom edge of the first opening is close to the outer ring of the negative Poisson's ratio unit and away from the inner ring of the negative Poisson's ratio unit, the bottom edge of the second opening is close to the inner ring of the negative Poisson's ratio unit and away from the outer ring of the negative Poisson's ratio unit, and the opening size of the first opening is smaller than the opening size of the second opening.

[0004] Furthermore, the non-pneumatic tire comprises a plurality of layers of the negative Poisson's ratio units, each of which is a concentric ring with the wheel center as the center, and the outer ring of the negative Poisson's ratio unit located relatively inside is fixedly connected to the inner ring of the negative Poisson's ratio unit located relatively outside.

[0005] Further, the non-pneumatic tire includes a first negative Poisson's ratio unit, a second negative Poisson's ratio unit and a third negative Poisson's ratio unit, the first negative Poisson's ratio unit, the second negative Poisson's ratio unit and the third negative Poisson's ratio unit are all concentric rings with the wheel center as the center, the second negative Poisson's ratio unit is located outside the first negative Poisson's ratio unit, the third negative Poisson's ratio unit is located outside the second negative Poisson's ratio unit, and isolation parts for isolating stress between adjacent negative Poisson's ratio units are respectively arranged between the first negative Poisson's ratio unit and the second negative Poisson's ratio unit and between the second negative Poisson's ratio unit and the third negative Poisson's ratio unit.

[0006] Further, the isolation portion includes a first isolation portion and a second isolation portion, the first isolation portion is located between the outer ring of the first negative Poisson's ratio unit and the inner ring of the second negative Poisson's ratio unit, the first negative Poisson's ratio unit and the second negative Poisson's ratio unit are fixedly connected as a whole through the first isolation portion, the second isolation portion is located between the outer ring of the second negative Poisson's ratio unit and the inner ring of the third negative Poisson's ratio unit, the second negative Poisson's ratio unit and the third negative Poisson's ratio unit are fixedly connected as a whole through the second isolation portion, the first isolation portion is used to isolate the stress between the first negative Poisson's ratio unit and the second negative Poisson's ratio unit, and the second isolation portion is used to isolate the stress between the second negative Poisson's ratio unit and the third negative Poisson's ratio unit.

[0007] Furthermore, the non-pneumatic tire also includes a first curved surface arranged on the tread and a second curved surface arranged on the sidewall, the first curved surface is used to contact the ground, a tread pattern is arranged on the first curved surface, and the first opening and the second opening are opened in the second curved surface along the Y direction.

[0008] Furthermore, the circle where the first arc surface is located and the circle where the second arc surface is located are tangent at the connection between the tread and the sidewall.

[0009] Furthermore, the first opening is an isosceles right triangle.

[0010] Furthermore, the bottom angle of the second opening is 50°.

[0011] Furthermore, the first opening and the second opening have the same opening shape, and the opening size of the second opening is 1.36 times the opening size of the first opening.

[0012] Furthermore, the utility model also includes a vehicle, which includes the aforementioned non-pneumatic tire.

[0013] The non-pneumatic tire provided by the utility model forms a negative Poisson's ratio structure through the first opening and the second opening that are arranged alternately in an isosceles triangle shape, providing sufficient strength and rigidity for the tire, ensuring the smoothness and comfort of driving, and also facilitating lightweighting. The utility model also uses a plurality of negative Poisson's ratio units arranged as concentric rings to make each negative Poisson's ratio unit as independent of each other as possible when the tire is stressed, so that the negative Poisson's ratio structure deforms more fully, avoiding the reduction of tire life due to stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a non-pneumatic tire provided by the utility model.

[0015] Figure 2 It is a YZ plane cross-sectional view of the non-pneumatic tire in the present invention.

[0016] Figure 3 It is a schematic diagram of the negative Poisson's ratio unit in the present invention.

[0017] Figure 4 It is a schematic diagram of the first curved surface in the present invention.

[0018] Figure 5 It is a schematic diagram of the first curved surface and the second curved surface in the present invention. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the present invention is described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0020] It should be noted that the terms "first", "second", "third", "fourth", etc. in the specification and claims of the utility model are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0021] The directional terms "X direction", "Y direction" and "Z direction" in this specification refer to the "body X direction", "body Y direction" and "body Z direction" commonly seen in the automotive field, respectively. The "body X direction" refers to the length direction of the body, and is also the front-to-back direction, with the front direction as the negative direction, i.e., X-; the "body Y direction" refers to the width direction of the body, with the direction from the cab side to the left door side as the negative direction, i.e., Y-; the "body Z direction" refers to the height direction of the body, and is also the gravity direction and the up-down direction, with the gravity direction as the negative direction, i.e., Z-.

[0022] See also Figure 1 to Figure 2The utility model provides a non-pneumatic tire, which is mainly suitable for electric two-wheeled vehicles, and is also suitable for bicycles or cars. The non-pneumatic tire in the utility model includes a negative Poisson's ratio unit 1 located on the sidewall, the negative Poisson's ratio unit 1 is annular, and includes a first opening 1a and a second opening 1b formed along the Y-direction hollow sidewall, the first opening 1a and the second opening 1b are alternately arranged on the negative Poisson's ratio unit 1, and the opening shapes of the first opening 1a and the second opening 1b are both isosceles triangles, the bottom edge of the first opening 1a is close to the outer ring of the negative Poisson's ratio unit 1 and away from the inner ring of the negative Poisson's ratio unit 1, the bottom edge of the second opening 1b is close to the inner ring of the negative Poisson's ratio unit 1 and away from the outer ring of the negative Poisson's ratio unit 1, and the opening size of the first opening 1a is smaller than the opening size of the second opening 1b. Specifically, the first opening 1a and the second opening 1b are hollow inverted triangles and hollow regular triangles arranged alternately on the sidewall, which form a negative Poisson's ratio structure on the non-pneumatic tire of the utility model. When the negative Poisson's ratio unit 1 is squeezed by an external force, the surrounding materials gather toward the force-bearing area to make the density of the material greater, thereby providing sufficient strength and rigidity for the tire, while also ensuring the smoothness and comfort of driving. In addition, this hollow opening design can minimize the weight of the tire, which is conducive to lightweighting. The size, setting interval and number of the first opening 1a and the second opening 1b in the utility model can be adjusted according to the actual size of the tire. In the present embodiment, the opening shapes of the first opening 1a and the second opening 1b are the same, both of which are isosceles triangles with a base angle of 50°. The opening size of the second opening 1b is obtained by scaling the opening size of the first opening 1a by 1.36 times, which reduces the weight by more than 30% compared with a solid non-pneumatic tire; in other embodiments of the utility model, the opening shape of the first opening 1a can also be set to an isosceles right triangle, and the corresponding opening shape of the second opening 1b is set to an isosceles triangle with a base angle of 50°.

[0023] Please also read Figure 3 and Figure 4Furthermore, the non-pneumatic tire of the present invention comprises a plurality of layers of negative Poisson's ratio units 1, each of which is a concentric ring with the wheel center as the center, and the outer ring of the negative Poisson's ratio unit 1 located relatively inside is fixedly connected to the inner ring of the negative Poisson's ratio unit 1 located relatively outside. Specifically, in the present embodiment, there are three layers of negative Poisson's ratio units 1 evenly arranged on the non-pneumatic tire of the present invention from inside to outside, namely, the first negative Poisson's ratio unit 11, the second negative Poisson's ratio unit 12 and the third negative Poisson's ratio unit 13, the first negative Poisson's ratio unit 11, the second negative Poisson's ratio unit 12 and the third negative Poisson's ratio unit 13 are all concentric rings with the wheel center as the center, the second negative Poisson's ratio unit 12 is located outside the first negative Poisson's ratio unit 11, and the third negative Poisson's ratio unit 13 is located outside the second negative Poisson's ratio unit 12, the three negative Poisson's ratio units 1 are mutually concentric rings, and the force deformation is independent of each other, so that the strength and durability of the tire are stronger. It is easy to understand that the opening size of the first opening 1a and the second opening 1b on the negative Poisson's ratio unit 1 located relatively on the inner side is smaller than the opening size of the first opening 1a and the second opening 1b on the negative Poisson's ratio unit 1 located relatively on the outer side. The negative Poisson's ratio unit 1 arranged in this way is conducive to reducing stress concentration and further improving the strength of the tire. In other embodiments of the utility model, the opening shapes of the second openings 1b on the first negative Poisson's ratio unit 11, the second negative Poisson's ratio unit 12 and the third negative Poisson's ratio unit 13 can be different, for example: the bottom angle of the second opening 1b on the negative Poisson's ratio unit 1 located relatively on the outer side is greater than the bottom angle of the second opening 1b on the negative Poisson's ratio unit 1 located relatively on the inner side, that is, the opening shapes of the second openings 1b on the first negative Poisson's ratio unit 11, the second negative Poisson's ratio unit 12 and the third negative Poisson's ratio unit 13 can be adjusted according to the actual size and design purpose of the tire.

[0024] Furthermore, an isolation portion 2 for isolating the stress between adjacent negative Poisson's ratio units 1 is provided between the first negative Poisson's ratio unit 11 and the second negative Poisson's ratio unit 12 , and between the second negative Poisson's ratio unit 12 and the third negative Poisson's ratio unit 13 . Specifically, the isolation portion 2 includes a first isolation portion 21 and a second isolation portion 22. The first isolation portion 21 is located between the outer ring of the first negative Poisson's ratio unit 11 and the inner ring of the second negative Poisson's ratio unit 12. The first negative Poisson's ratio unit 11 and the second negative Poisson's ratio unit 12 are fixedly connected as a whole through the first isolation portion 21. The second isolation portion 22 is located between the outer ring of the second negative Poisson's ratio unit 12 and the inner ring of the third negative Poisson's ratio unit 13. The second negative Poisson's ratio unit 12 and the third negative Poisson's ratio unit 13 are fixedly connected as a whole through the second isolation portion 22. The first isolation portion 21 is used to isolate the stress between the first negative Poisson's ratio unit 11 and the second negative Poisson's ratio unit 12. The second isolation portion 22 is used to isolate the stress between the second negative Poisson's ratio unit 12 and the third negative Poisson's ratio unit 13. In this embodiment, the first negative Poisson's ratio unit 11, the second negative Poisson's ratio unit 12, the third negative Poisson's ratio unit 13, the first isolation portion 21 and the second isolation portion 22 are integrally formed. The first isolation portion 21 and the second isolation portion 22 make the first negative Poisson's ratio unit 11, the second negative Poisson's ratio unit 12 and the third negative Poisson's ratio unit 13 as independent of each other as possible when subjected to force, so that the negative Poisson's ratio structure deforms more fully, avoiding a decrease in tire life due to stress concentration.

[0025] Please also read Figure 5 Furthermore, the non-pneumatic tire further comprises a first curved surface 3 arranged on the tread and a second curved surface 4 arranged on the sidewall, the first curved surface 3 is used to contact the ground, a tread pattern 31 is arranged on the first curved surface 3, and the first opening 1a and the second opening 1b are opened in the second curved surface 4 along the Y direction. Specifically, the specification is attached Figure 5 The schematic diagram of the YZ section of the non-pneumatic tire in the utility model, the two circles in the figure respectively show the circles where the first arc surface 3 and the second arc surface 4 are located, the tread pattern 31 set on the first arc surface 3 is conducive to improving the friction and drainage performance of the tire, the second arc surface 4 is essentially the area where the first opening 1a and the second opening 1b are hollowed out on the sidewall, the first opening 1a and the second opening 1b pass through the non-pneumatic tire in the utility model along the Y direction, and the second arc surface 4 is the wheel hub installation area below the Z direction, which is used to be directly assembled with the wheel hub, that is, the non-pneumatic tire in the utility model can be used as a tire alone. In this embodiment, the circle where the first arc surface 3 is located and the circle where the second arc surface 4 is located are tangent at the connection between the tread and the sidewall, the diameter of the first arc surface 3 is 192mm, and the diameter of the second arc surface 4 is 62mm. The non-pneumatic tire of the utility model makes the tire grounding footprint present an ellipse or square shape through the first arc surface 3 located on the tread and the second arc surface 4 located on the sidewall, which increases the tire grounding area, helps to reduce tire wear, and improve product life.

[0026] Furthermore, the utility model also includes a vehicle, which includes the aforementioned non-pneumatic tire.

[0027] In summary, the non-pneumatic tire of the utility model forms a negative Poisson's ratio structure by means of the first opening and the second opening that are arranged alternately in an isosceles triangle shape, which provides sufficient strength and rigidity for the tire, ensures the smoothness and comfort of driving, and is also conducive to lightweighting. The utility model also uses a plurality of negative Poisson's ratio units arranged as concentric rings to make each negative Poisson's ratio unit as independent of each other as possible when the tire is subjected to force, so that the negative Poisson's ratio structure deforms more fully, avoiding the reduction of tire life due to stress concentration.

[0028] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A non-pneumatic tire, characterized in that: The non-pneumatic tire comprises a negative Poisson's ratio unit (1) arranged on the sidewall, the negative Poisson's ratio unit (1) is annular, and comprises a first opening (1a) and a second opening (1b) formed by hollowing out the sidewall along the Y direction, the first opening (1a) and the second opening (1b) are alternately arranged at intervals on the negative Poisson's ratio unit (1), the opening shapes of the first opening (1a) and the second opening (1b) are both isosceles triangles, the bottom edge of the first opening (1a) is close to the outer ring of the negative Poisson's ratio unit (1) and away from the inner ring of the negative Poisson's ratio unit (1), the bottom edge of the second opening (1b) is close to the inner ring of the negative Poisson's ratio unit (1) and away from the outer ring of the negative Poisson's ratio unit (1), and the opening size of the first opening (1a) is smaller than the opening size of the second opening (1b).

2. The non-pneumatic tire according to claim 1, characterized in that: The non-pneumatic tire comprises a plurality of layers of negative Poisson's ratio units (1), each of the negative Poisson's ratio units (1) being concentric rings with the wheel center as the center, and the outer ring of the negative Poisson's ratio unit (1) located relatively inside is fixedly connected to the inner ring of the negative Poisson's ratio unit (1) located relatively outside.

3. The non-pneumatic tire according to claim 2, characterized in that: The non-pneumatic tire comprises a first negative Poisson's ratio unit (11), a second negative Poisson's ratio unit (12) and a third negative Poisson's ratio unit (13); the first negative Poisson's ratio unit (11), the second negative Poisson's ratio unit (12) and the third negative Poisson's ratio unit (13) are all concentric rings with the wheel center as the center; the second negative Poisson's ratio unit (12) is located outside the first negative Poisson's ratio unit (11); the third negative Poisson's ratio unit (13) is located outside the second negative Poisson's ratio unit (12); and an isolation portion (2) for isolating stress between adjacent negative Poisson's ratio units (1) is provided between the first negative Poisson's ratio unit (11) and the second negative Poisson's ratio unit (12) and between the second negative Poisson's ratio unit (12) and the third negative Poisson's ratio unit (13).

4. The non-pneumatic tire according to claim 3, characterized in that: The isolating portion (2) comprises a first isolating portion (21) and a second isolating portion (22); the first isolating portion (21) is located between an outer ring of the first negative Poisson's ratio unit (11) and an inner ring of the second negative Poisson's ratio unit (12); the first negative Poisson's ratio unit (11) and the second negative Poisson's ratio unit (12) are fixedly connected as a whole through the first isolating portion (21); the second isolating portion (22) is located between an outer ring of the second negative Poisson's ratio unit (12) and an inner ring of the third negative Poisson's ratio unit (13); the second negative Poisson's ratio unit (12) and the third negative Poisson's ratio unit (13) are fixedly connected as a whole through the second isolating portion (22); the first isolating portion (21) is used to isolate the stress between the first negative Poisson's ratio unit (11) and the second negative Poisson's ratio unit (12); and the second isolating portion (22) is used to isolate the stress between the second negative Poisson's ratio unit (12) and the third negative Poisson's ratio unit (13).

5. The non-pneumatic tire according to claim 1, characterized in that: The non-pneumatic tire further comprises a first curved surface (3) arranged on the tread and a second curved surface (4) arranged on the sidewall, the first curved surface (3) being used for contacting the ground, a tread pattern (31) being arranged on the first curved surface (3), and the first opening (1a) and the second opening (1b) being arranged in the second curved surface (4) along the Y direction.

6. The non-pneumatic tire according to claim 5, characterized in that: The circle on which the first arc surface (3) is located and the circle on which the second arc surface (4) is located are tangent at the connection between the tread and the sidewall.

7. The non-pneumatic tire according to claim 1, characterized in that: The first opening (1a) is an isosceles right triangle.

8. The non-pneumatic tire according to claim 1, wherein: The bottom angle of the second opening (1b) is 50°.

9. The non-pneumatic tire according to claim 1, characterized in that: The first opening (1a) and the second opening (1b) have the same opening shape, and the opening size of the second opening (1b) is 1.36 times the opening size of the first opening (1a).

10. A vehicle, characterized in that: The vehicle comprises a non-pneumatic tire as claimed in any one of claims 1 to 9.

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