Double S-shaped reinforced spoke and tire for non-pneumatic tire

Abstract

The present invention relates to a double S-shaped reinforced wheel spoke and tire for a non-pneumatic tire, wherein the reinforced wheel spoke comprises a first leg structure, a second leg structure and a double S-shaped glass fiber reinforced structure, wherein the first leg structure and the second leg structure are in a non-connected V-shaped structure, wherein the opposite ends of the first leg structure and the second leg structure are smoothly connected through a nose joint, wherein the opposite ends of the first leg structure and the second leg structure are respectively bent toward the outer surface direction of the first leg structure and the second leg structure to form an arc structure matching the two ends of the glass fiber reinforced structure, wherein the glass fiber reinforced structure is embedded in the first leg structure, the second leg structure and the nose joint and extends to the opposite ends of the first leg structure and the second leg structure. The leg structure of the present invention can provide a stronger bearing capacity and effectively avoid the generation of tensile stress by adopting a double S-shaped glass fiber reinforced structure, thereby improving the fatigue life of the reinforced wheel spoke.

Description

Technical Field

[0001] The present invention relates to the technical field of tire support structures, and more particularly to a double S-shaped reinforced spoke for a non-pneumatic tire and a tire. Background Art

[0002] With the improvement of people's living standards, various industries are making rapid progress. Safety and low energy consumption are important magic weapons for survival in every industry. In the automotive industry, vehicle safety is of paramount importance. The safety of vehicle driving directly affects the sales prospects of the vehicle and the performance index of the whole vehicle.

[0003] At present, the automobile industry is booming. Safety, new energy, energy saving, and environmental protection are called the development trends of automobiles. For this reason, automobile companies pay more and more attention to the research on automobile lightweight and safety. During the driving process of the car, the wheels need to deal with the stress generated by the weight load of the car body and various dynamic loads at the same time. Therefore, wheel safety has become one of the important indicators for judging the performance of the whole vehicle. As automobile parts develop towards high performance, safety, energy saving, and consumption reduction, high-strength wheels have become the focus of wheel lightweight safety research.

[0004] At present, both domestic and foreign wheels are developing towards lightweight in design and manufacturing. The long shoulder and short shoulder rims of the wheel are most susceptible to impact deformation. In actual use, wheel damage is often caused by deformation of the wheel rims. However, whether the wheel rims will be impacted depends on the strength of the vehicle spokes supporting the non-pneumatic tire.

[0005] In the design of spoke structures of non-pneumatic tires at home and abroad, the basic theoretical basis is usually to embed rubber materials into high-strength linear load-bearing structures. Among them, the high-strength load-bearing structures that provide the main load-bearing effect are often embedded in the rubber body in a linear form, and provide the load-bearing effect through coupling with the rubber. The linear load-bearing structures provide load-bearing capacity in the form of bending under stress. This form of stress can easily cause a lever effect, resulting in stress amplification and low load-bearing efficiency. Secondly, when the linear load-bearing structure is embedded in the rubber body and subjected to stress, its ends are very likely to crack due to the warping effect caused by the stress, and then fatigue damage occurs, causing spoke failure. Summary of the invention

[0006] The present invention aims to overcome the problems of stress amplification caused by the lever effect, low load-bearing efficiency and easy cracking and fatigue damage of the rubber structure caused by the warping of the end parts of the linear load-bearing structure adopted by the vehicle wheel spokes in the prior art, and provide a double S-shaped reinforced wheel spoke and tire for non-pneumatic tires.

[0007] A double S-shaped reinforced wheel spoke for a non-pneumatic tire, comprising a first leg structure, a second leg structure and a double S-shaped glass fiber reinforced structure, wherein the first leg structure and the second leg structure are unconnected V-shaped structures, the opposite ends of the first leg structure and the second leg structure are smoothly connected by a nose combination body, the opposite ends of the first leg structure and the second leg structure are respectively bent toward the outer surface direction of the first leg structure and the second leg structure to form an arc structure matching the two ends of the glass fiber reinforced structure, and the glass fiber reinforced structure is embedded in the first leg structure, the second leg structure and the nose combination body and extends to the opposite ends of the first leg structure and the second leg structure.

[0008] Furthermore, as a preferred technical solution, a first corner structure connected to the first leg structure and a second corner structure connected to the second leg structure are respectively provided on inner sides of opposite ends of the first leg structure and the second leg structure.

[0009] Furthermore, as a preferred technical solution, the inner side surface of the first corner structure and the inner side surface of the first leg structure are located in the same plane, and the inner side surface of the second corner structure and the inner side surface of the second leg structure are located in the same plane.

[0010] Furthermore, as a preferred technical solution, the glass fiber reinforced structure is close to the outer side surface of the first leg structure and the second leg structure, and the thickness of the rubber layer located on the surface of the glass fiber reinforced structure is greater than or equal to 0.1 mm.

[0011] Furthermore, as a preferred technical solution, the glass fiber reinforced structure includes a plurality of glass fiber reinforced members arranged along the radial direction of the tire, and the plurality of glass fiber reinforced members are arranged in parallel.

[0012] Furthermore, as a preferred technical solution, the diameter of the glass fiber reinforcement is set to 0.8-2 mm, and the spacing between two adjacent glass fiber reinforcements is set to 0.2-1 mm.

[0013] Furthermore, as a preferred technical solution, the glass fiber reinforcement is prepared by compounding continuous glass fiber and epoxy vinyl resin.

[0014] Furthermore, as a preferred technical solution, a hollow structure is provided on the end face of the first corner structure or the second corner structure, and the hollow structure is close to the inner side surface of the first corner structure or the second corner structure.

[0015] Furthermore, as a preferred technical solution, the radius of the hollowed-out structure is 3-6 mm.

[0016] A non-pneumatic tire comprises a tread band, a wheel hub matching the tread band, and a plurality of the above-mentioned reinforced wheel spokes, wherein the plurality of the reinforced wheel spokes are distributed between the tread band and the wheel hub along a circumference of the wheel hub.

[0017] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0018] The leg structure of the reinforced spoke of the present invention adopts a double S-shaped glass fiber reinforced structure, thereby avoiding the straight load-bearing structure adopted by the vehicle spokes in the prior art, which causes stress amplification due to the lever effect during use, low load-bearing efficiency, and the rubber structure is prone to cracks and fatigue damage due to warping due to the force on its ends. The double S-shaped glass fiber reinforced structure adopted in the present invention can provide stronger load-bearing capacity and effectively avoid the generation of tensile stress, thereby improving the fatigue life of the reinforced spoke.

[0019] The non-pneumatic tire of the present invention can provide a stronger load-bearing capacity during use by adopting the reinforced spokes, effectively avoid the generation of tensile stress, and improve the fatigue life of the non-pneumatic tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the reinforced spoke structure of the present invention.

[0021] Figure 2 A cross-sectional view of the spokes enhanced for the present invention.

[0022] Figure 3 It is a schematic diagram of the load-bearing curve of the reinforced wheel spoke using discontinuous glass fiber reinforcement in the prior art.

[0023] Figure 4 It is a schematic diagram of the load-bearing curve of the reinforced spoke of the present invention using a continuous double S-shaped glass fiber reinforcement.

[0024] Figure 5 It is a schematic diagram of the deformation of the continuous double S-shaped glass fiber reinforcement member used in the reinforced spoke of the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the non-pneumatic tire of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with specific implementation modes.

[0027] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent.

[0028] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes, mainly to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components, and cannot be understood as indicating or implying relative importance.

[0029] Example 1

[0030] In order to solve the problems in the prior art that the support leg portion of the vehicle wheel spoke adopts a linear reinforcement as the load-bearing structure, which amplifies the stress due to the lever effect during use and has low load-bearing efficiency, and the linear reinforcement as the load-bearing structure, the ends of which are very likely to cause cracks in the rubber structure due to the warping effect caused by the force, and then fatigue damage occurs, causing spoke failure, etc., this embodiment discloses a double S-shaped reinforced spoke for a non-pneumatic tire to effectively avoid the above defects. At the same time, the double S-shaped reinforced spoke can provide a stronger load-bearing capacity and effectively avoid the generation of tensile stress, thereby further improving the fatigue life of the reinforced spoke.

[0031] The specific structure of the double S-shaped reinforced spokes for the non-pneumatic tire of this embodiment is as follows: Figure 1 As shown, it includes a first leg structure 1, a second leg structure 2, a double S-shaped glass fiber reinforced structure 3, a nose combination body 4, a first corner structure 5 and a second corner structure 6. The first leg structure 1 and the second leg structure 2 are in a non-connected V-shaped structure. The opposite ends of the first leg structure 1 and the second leg structure 2 are smoothly connected through the nose combination body 4. The opposite ends of the first leg structure 1 and the second leg structure 2 are respectively bent toward the outer surface direction of the first leg structure 1 and the second leg structure 2 to form an arc structure matching the two ends of the glass fiber reinforced structure 3. The glass fiber reinforced structure 3 is embedded in the first leg structure 1, the second leg structure 2 and the nose combination body 4 and extends to the opposite ends of the first leg structure 1 and the second leg structure 2. The first corner structure 5 is arranged on the inner side surface of the first leg structure 1 opposite to the end of the second leg structure 2, and the second corner structure 6 is arranged on the inner side surface of the second leg structure 2 opposite to the first leg structure 1.

[0032] In this embodiment, the inner side surface of the first angle structure 5 and the inner side surface of the first leg structure 1 are located in the same plane, the inner side surface of the second angle structure 6 and the inner side surface of the second leg structure 2 are located in the same plane, and the opposite ends of the first leg structure 1 and the second leg structure 2 are smoothly connected by the nose combination body 4, so that the inner side surfaces of the first leg structure 1 and the second leg structure 2 are V-shaped surfaces with an arc-shaped bottom, and the outer side surfaces of the first leg structure 1 and the second leg structure 2 are also V-shaped surfaces with an arc-shaped bottom, and the opposite ends of the first leg structure 1 and the second leg structure 2 are bent toward the outer surface directions of the first leg structure 1 and the second leg structure 2 respectively, forming an arc structure matching the two ends of the glass fiber reinforced structure 3. Therefore, the opposite ends of the outer side surfaces of the first leg structure 1 and the second leg structure 2 are arc-shaped surfaces, so that the reinforced spokes are a continuous double S-shaped integrated structure.

[0033] Since the first corner structure 5 is arranged on the inner side surface of the first leg structure 1 opposite to the second leg structure 2, and the second corner structure 6 is arranged on the inner side surface of the second leg structure 2 opposite to the first leg structure 1, the outer side surface of the first corner structure 5 is the outer side surface of the first leg structure 1 opposite to the second leg structure 2, and the outer side surface of the second corner structure 6 is the outer side surface of the second leg structure 2 opposite to the first leg structure 1. The outer side surfaces of the first corner structure 5 and the second corner structure 6 are arc-shaped structures that match the two ends of the glass fiber reinforced structure 3.

[0034] In this embodiment, the glass fiber reinforced structure 3 is embedded in the first leg structure 1, the second leg structure 2 and the nose combination 4 in an inlaid form, and both ends of the glass fiber reinforced structure 3 extend to the opposite ends of the first leg structure 1 and the second leg structure 2.

[0035] As a preferred embodiment, the glass fiber reinforced structure 3 is in line with the outer contour of the entire reinforced spoke, so the embedded position of the glass fiber reinforced structure 3 is close to the outer side surfaces of the first leg structure 1 and the second leg structure 2 so as to be wrapped by the rubber body.

[0036] Further, as a preferred embodiment, the thickness of the rubber layer located on the surface of the glass fiber reinforced structure 3 is greater than or equal to 0.1 mm. Preferably, the thickness of the rubber layer located on the surface of the glass fiber reinforced structure 3 is 0.2-0.3 mm.

[0037] In this embodiment, the glass fiber reinforced structure 3 includes a plurality of glass fiber reinforced members 31 arranged along the radial direction of the tire, and the plurality of glass fiber reinforced members 31 are arranged in parallel and at equal intervals.

[0038] As a preferred embodiment, the spacing between two adjacent glass fiber reinforcement pieces 31 is set to 0.2-1 mm. Preferably, the spacing between two adjacent glass fiber reinforcement pieces 31 is set to 0.4-0.6 mm.

[0039] In this embodiment, the glass fiber reinforcement member 31 is prepared by compounding continuous glass fiber and epoxy resin.

[0040] The specific shape of the glass fiber reinforcement 31 is as follows: Figure 2 As shown: it includes a first reinforcement part 311 arranged in parallel with the outer surface of the first leg structure 1, a second reinforcement part 312 arranged in parallel with the outer surface of the second leg structure 2, and an arc-shaped third reinforcement part 313 cocentric with the outer surface of the nose combination body 4. The opposite ends of the first reinforcement part 311 and the second reinforcement part 312 are transitionally connected through the third reinforcement part 313, and the end of the first reinforcement part 311 opposite to the second reinforcement part 312 is bent toward the outer surface of the first leg structure 1 to form a fourth reinforcement part 314 with the same outer surface shape as the end of the first leg structure 1, and the end of the second reinforcement part 312 opposite to the first reinforcement part 311 is bent toward the outer surface of the second leg structure 2 to form a fifth reinforcement part 315 with the same outer surface shape as the end of the second leg structure 2. The first reinforcement part 311, the second reinforcement part 312, the third reinforcement part 313, the fourth reinforcement part 314 and the fifth reinforcement part 315 are continuously integrally formed, so that the entire glass fiber reinforcement part 31 presents an S-shaped structure matching the reinforced spoke structure.

[0041] In addition, in this embodiment, the glass fiber reinforcement 31 is a columnar structure, and the third reinforcement part 313, the fourth reinforcement part 314 and the fifth reinforcement part 315 are all columnar and bent into an arc shape. Therefore, the outer surface of the nose combination 4 of the entire reinforced spoke, the outer surface of the first corner structure 5 and the second corner structure 6 are all arc-shaped surfaces.

[0042] In this embodiment, the diameter of the glass fiber reinforcement 31 is set to 0.8-2 mm. As a preferred embodiment, the diameter of the glass fiber reinforcement 31 is set to 1.2-1.6 mm.

[0043] The reinforced spokes of this embodiment use a continuous double S-shaped glass fiber reinforced structure 3 as their load-bearing structure, and the structure of the reinforced spokes is also set to a double S shape that matches the glass fiber reinforced structure 3 to provide stronger load-bearing capacity, effectively avoid the generation of tensile stress, thereby avoiding the generation of lever effect, improving the load-bearing efficiency and reinforcing the fatigue life of the spokes; at the same time, the curved structure avoids the problem of end warping and spoke failure caused by rubber cracks caused by end warping.

[0044] Specifically, Figure 3-4As shown, the double S-shaped reinforced spokes of this embodiment have a bearing capacity that increases according to the driving distance during use, which is better than the conventional spokes with discontinuous glass fiber reinforcements; at the same time, the polar deformation of the reinforced spokes is as shown in FIG. Figure 5 As shown, the tensile strain is reduced from 44.7% to 28.38% compressive strain, which greatly enhances the fatigue resistance of the rubber reinforcing the spoke.

[0045] Among them, the compression fatigue resistance of rubber is better than its tensile fatigue resistance.

[0046] Example 2

[0047] In order to further relieve the stress and bearing capacity problems of the reinforced spokes due to the lever effect, the present embodiment optimizes the structure of the double S-shaped reinforced spokes for the non-pneumatic tire described in Embodiment 1.

[0048] In this embodiment, if Figure 2 As shown, a hollow structure 61 is provided on the end surface of the first corner structure 5 or the second corner structure 6, and the hollow structure 61 is close to the inner side surface of the first corner structure 5 or the second corner structure 6. Thus, the end surface of the first corner structure 5 or the second corner structure 6 provided with the hollow structure 61 is composed of an arc and a line segment tangent thereto.

[0049] In this embodiment, the hollow structure 61 is determined according to the stress condition of the reinforced spoke, so as to release the tensile stress of the bottom bonding surface of the reinforced spoke, thereby improving the fatigue strength of the reinforced spoke.

[0050] Therefore, as a preferred embodiment, the hollow structure 61 is arranged opposite to the wheel hub of the tire. The radius of the hollow structure 61 is set to 3-6 mm, preferably, the radius of the hollow structure 61 is set to 4-5 mm.

[0051] Therefore, this embodiment further avoids the generation of tensile stress in the reinforced spokes and improves the fatigue life of the reinforced spokes.

[0052] Example 3

[0053] This embodiment discloses a non-pneumatic tire, such as Figure 6 As shown, it includes a tread band 7, a hub 8 matching the tread band 7, and a plurality of reinforced spokes as described in Example 2, wherein the plurality of reinforced spokes are distributed between the tread band 7 and the hub 8 along a circle of the hub 8.

[0054] Specifically, the first leg structure 1 of the reinforced spoke is connected to the radial inner surface of the outer tread band 7 through the first angle structure 5 , and the second leg structure 2 is connected to the outer surface of the hub 8 through the second angle structure 6 .

[0055] Since the hollow structure 61 is arranged opposite to the wheel hub of the tire, the hollow structure 61 is arranged on the end surface of the second corner structure 6 .

[0056] The non-pneumatic tire of this embodiment adopts double S-shaped reinforced spokes, which can provide stronger load-bearing capacity during its use and effectively avoid the generation of tensile stress. It also avoids the warping of the reinforced spoke ends due to force and the spoke failure caused by rubber cracks caused by the warping of the ends, thereby improving the fatigue life of the non-pneumatic tire.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A double S-shaped reinforced spoke for a non-pneumatic tire, characterized in that: The invention comprises a first leg structure (1), a second leg structure (2) and a double S-shaped glass fiber reinforced structure (3), wherein the first leg structure (1) and the second leg structure (2) are in a non-connected V-shaped structure, the opposite ends of the first leg structure (1) and the second leg structure (2) are smoothly connected via a nose joint (4), the opposite ends of the first leg structure (1) and the second leg structure (2) are respectively bent toward the outer surface of the first leg structure (1) and the second leg structure (2) to form an arc structure matching the two ends of the glass fiber reinforced structure (3), and the glass fiber reinforced structure (3) is embedded in the first leg structure (1), the second leg structure (2) and the nose joint (4) and extends to the opposite ends of the first leg structure (1) and the second leg structure (2); The glass fiber reinforced structure (3) is close to the outer side surface of the first leg structure (1) and the second leg structure (2), and the thickness of the rubber layer located on the surface of the glass fiber reinforced structure (3) is greater than or equal to 0.1 mm; A first supporting angle structure (5) connected to the first supporting leg structure (1) and a second supporting angle structure (6) connected to the second supporting leg structure (2) are respectively provided on the inner side surfaces of the opposite ends of the first supporting leg structure (1) and the second supporting leg structure (2); The inner side surface of the first corner structure (5) and the inner side surface of the first leg structure (1) are located in the same plane, and the inner side surface of the second corner structure (6) and the inner side surface of the second leg structure (2) are located in the same plane.

2. The double S-shaped reinforced spoke for a non-pneumatic tire according to claim 1, characterized in that: The glass fiber reinforced structure (3) comprises a plurality of glass fiber reinforced members (31) arranged along the radial direction of the tire, and the plurality of glass fiber reinforced members (31) are arranged in parallel.

3. The double S-shaped reinforced spoke for a non-pneumatic tire according to claim 2, characterized in that: The diameter of the glass fiber reinforcement piece (31) is set to 0.8-2 mm, and the spacing between two adjacent glass fiber reinforcement pieces (31) is set to 0.2-1 mm.

4. The double S-shaped reinforced spoke for a non-pneumatic tire according to claim 2, characterized in that: The glass fiber reinforcement (31) is prepared by compounding continuous glass fibers and epoxy resin.

5. The double S-shaped reinforced spoke for a non-pneumatic tire according to claim 2, characterized in that: A hollow structure (61) is provided on the end surface of the first corner structure (5) or the second corner structure (6), and the hollow structure (61) is close to the inner side surface of the first corner structure (5) or the second corner structure (6).

6. The double S-shaped reinforced spoke for a non-pneumatic tire according to claim 5, characterized in that: The radius of the hollow structure (61) is 3-6 mm.

7. A non-pneumatic tire, characterized in that: It comprises a tread band (7), a hub (8) matching the tread band (7), and a plurality of reinforced spokes as claimed in any one of claims 1 to 6, wherein the plurality of reinforced spokes are distributed between the tread band (7) and the hub (8) along a circle of the hub (8).

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