Noise-reducing and air-leakage-preventing tire structure

Abstract

The utility model discloses a noise-reducing and air-leakage-preventing tire structure which comprises a tire body, the inner side of the tire body is provided with a tire tread inner wall and a tire bead inner wall, an in-tire cavity is formed in the tire body, and the in-tire cavity is defined by the tire tread inner wall and the tire bead inner wall; the foaming body is attached to the inner wall of the tread, a hot melt adhesive layer is arranged between the foaming body and the inner wall of the tread, and the hot melt adhesive layer is used for attaching the foaming body to the inner wall of the tread. The noise reduction and air leakage prevention tire structure has good noise reduction and air leakage prevention effects.

Description

Technical Field

[0001] The present application relates to the field of tires, and in particular to a noise-reducing and air-leakage-proof tire structure. Background Art

[0002] Vehicles running on the road, whether cars, motorcycles or bicycles, mostly move forward, backward or turn by rolling wheels, and the tires of the wheels are in direct contact with the ground to roll. Therefore, the tires must absorb the impact force from the ground when rolling, so the material of the tires is rubber with elastic and buffering properties, which is used to effectively improve the comfort during driving; in addition, the tires also have a certain degree of support requirements to withstand the gravity of the upper vehicle body, passengers and objects.

[0003] The main problems faced by tires on the market during use are foreign body puncture and wheel noise. When a tire on the market runs over a sharp foreign body, the sharp foreign body will easily puncture the tire, causing the gas inside the tire to leak quickly or slowly from the hole, resulting in insufficient tire pressure, which in turn leads to driving difficulties and dangers. In addition, tire noise has always been a troubling problem. In addition to the friction between the tire tread and the road surface, another reason is that when the tire rotates and drives, the tread repeatedly contacts the road surface to produce deformation and vibrate. The vibration of the tread causes the air inside the tire to vibrate, deriving tire cavity resonance sound. Tire cavity resonance sound is a low-frequency noise, especially the tire cavity resonance phenomenon is more obvious around 200Hz~250Hz, or when crossing the road expansion joint or uneven road surface, it is easier to stimulate the tire cavity resonance sound. Therefore, in order to provide drivers and passengers with a more comfortable riding experience, in addition to safety, reducing tire noise is one of the main goals pursued by various tire manufacturers.

[0004] How to solve the above-mentioned problems and deficiencies is the direction of efforts of the applicant's invention team and related manufacturers in this industry. Utility Model Content

[0005] Purpose of the utility model: In order to solve the above-mentioned problems, the present application provides a noise-reducing and air-leakage-proof tire structure.

[0006] Technical solution: The embodiment of the present application provides a noise reduction and air leakage prevention tire structure, comprising a carcass, wherein the inner side of the carcass has a tread inner wall and a sidewall inner wall, and the interior of the carcass has a tire cavity, wherein the tire cavity is surrounded by the tread inner wall and the sidewall inner wall;

[0007] A foam body is attached to the inner wall of the tread, and a hot melt adhesive layer is provided between the foam body and the inner wall of the tread, and the hot melt adhesive layer is used to attach the foam body to the inner wall of the tread.

[0008] In some embodiments, the tire body includes a tread and a tire edge, the tire edge is located on both sides of the tread, the foam body is attached to the inner wall of the tire edge at the same time, and a hot melt adhesive layer is provided between the foam body and the inner wall of the tire edge.

[0009] In some embodiments, the tread inner wall is disposed around the inner side of the carcass, and the foam is disposed around the inner side of the carcass along the tread inner wall.

[0010] In some embodiments, the density of the foaming material of the foam body is 30 kg / m 3 ~40kg / m 3 .

[0011] In some embodiments, the foaming material is selected from at least one of thermoplastic polyurethane, thermoplastic elastomer, ethylene-vinyl acetate copolymer, polyethylene and rubber.

[0012] In some embodiments, the material of the hot melt adhesive layer is selected from at least one of rosin resin hot melt adhesive, ethylene-vinyl acetate copolymer hot melt adhesive and polyolefin hot melt adhesive.

[0013] In some embodiments, the material of the hot melt adhesive layer is nano hot melt adhesive.

[0014] In some embodiments, the material of the hot melt adhesive layer has a melt viscosity of 18000 cps within a temperature range of -35°C to 120°C.

[0015] Beneficial effect: The embodiment of the present application provides a noise-reducing and air-leak-proof tire structure, comprising a carcass, wherein the inner side of the carcass has a tread inner wall and a sidewall inner wall, and the interior of the carcass has a tire cavity, and the tire cavity is surrounded by the tread inner wall and the sidewall inner wall; a foam body, wherein the foam body is attached to the tread inner wall, and a hot-melt adhesive layer is provided between the foam body and the tread inner wall, and the hot-melt adhesive layer is used to attach the foam body to the tread inner wall. The noise-reducing and air-leak-proof tire structure of the present application has good noise reduction and air-leak-proof effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of the noise reduction and air leakage prevention tire structure in an embodiment of the present application;

[0017] Figure 2 A cross-sectional schematic diagram of a noise-reducing and air-leak-proof tire structure in an embodiment of the present application;

[0018] Figure 3 A cross-sectional schematic diagram of a noise-reducing and air-leak-proof tire structure in an embodiment of the present application;

[0019] Figure 4 A schematic diagram of the noise reduction and air leakage prevention tire structure in the embodiment of the present application during implementation;

[0020] Figure 5 A schematic diagram of the noise reduction and air leakage prevention tire structure in the embodiment of the present application during implementation;

[0021] Figure 6 A schematic diagram of the noise reduction and air leakage prevention tire structure in the embodiment of the present application during implementation;

[0022] Figure 7 A cross-sectional schematic diagram of another structure of the noise reduction and air leakage prevention tire structure in the embodiment of the present application;

[0023] Figure 8 It is a schematic diagram of another structure of the noise reduction and air leakage prevention tire structure in the embodiment of the present application during implementation. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0025] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] Example 1: Figure 1 As shown, the noise-reducing and air-leak-proof tire structure 1 of the present application includes a carcass 2. The carcass 2 is generally a circular structure, and the carcass 2 can be combined with a wheel frame.

[0028] The tire body 2 includes a tread 21 and a sidewall 22. The tread 21 is the part where the noise-reducing and air-leak-proof tire structure 1 contacts the ground. The sidewalls 22 are located on both sides of the tread 21. The tire body 2 has a tread inner wall 23 on the inner side of the tread 21. The tread inner wall 23 surrounds the inner side of the tire body 2.

[0029] In addition, the carcass 2 has a sidewall inner wall 24 on the inner side relative to the sidewall 22 , and the interior of the carcass 2 has a tire cavity 25 defined by the tread inner wall 23 and the sidewall inner wall 24 , and the tire cavity 25 can accommodate the wheel frame.

[0030] The noise reduction and air leakage prevention tire structure 1 in the embodiment of the present application includes a foam body 3, which is attached to the inner wall 23 of the tread. In some specific embodiments, the inner wall 23 of the tread surrounds the inner side of the tread 21, and the foam body 3 surrounds the inner side of the tire body 2 along the inner wall 23 of the tread. In some embodiments, the density of the foam material selected for the foam body 3 is 30kg / m 3 ~40kg / m 3 The foaming material is formed of a physical foaming material, and the foaming material can be thermoplastic polyurethane (TPU), thermoplastic elastomer (TPE), ethylene-vinyl acetate copolymer (EVA), polyethylene (PE), rubber, or a combination thereof.

[0031] In some embodiments, there is a hot melt adhesive layer 31 between the foam body 3 and the inner wall 23 of the tread, so that the foam body 3 is stably attached to the inner wall 23 of the tread. The hot melt adhesive layer 31 can be one or more of rosin resin hot melt adhesive, ethylene-vinyl acetate copolymer hot melt adhesive, and polyolefin hot melt adhesive. In some embodiments, the hot melt adhesive layer 31 of the present application is a nano hot melt adhesive, and the material of the hot melt adhesive layer 31 has a melt viscosity of 18000cps within a temperature range of -35°C to 120°C.

[0032] In some embodiments, after the tread inner wall 23 of the present application is attached to the foam body 3 in a surrounding manner, the tire body 2 can be combined with the wheel frame by the tire inner cavity 25, the tire body 2 is wrapped around the wheel frame, and the foam body 3 is arranged between the wheel frame and the tread inner wall 23.

[0033] like Figure 3 , Figure 4 , Figure 5This is a specific embodiment of the noise-reducing and air-leak-proof tire structure 1 of the present application. The tire body 2 of the present application is assembled on the outer periphery of the wheel frame. When the tread 21 rubs against the ground and generates vibration, the foam 3 on the inner wall 23 of the tread can absorb the vibration frequency, and the foam 3 can also absorb the air vibration inside the tire body 2, thereby reducing the noise generated by the vibration of the tire body 2, thereby achieving the effect of noise reduction. Figure 6 As shown, when the tire body 2 presses over a sharp foreign object and the sharp foreign object 4 punctures the tread 21, the sharp foreign object 4 will pass through the hot melt adhesive layer 31 and directly puncture the foam body 3. The foam body 3 is elastic and has a certain thickness to cover the sharp foreign object 4, so that the sharp foreign object 4 will not puncture the foam body 3 and will be completely covered in the foam body 3. At the same time, the hot melt adhesive layer 31 will adhere to the sharp foreign object 4 and enter the foam body 3 to fill it, and enter the tread inner wall 23 to fill the tread 21, thereby achieving the function of preventing penetration and filling the gap between the tread inner wall 23 and the tread 21 and the sharp foreign object 4, and at the same time, it can also avoid the problem of being unable to drive normally due to air leakage.

[0034] Furthermore, even if the length of the sharp foreign object 4 is greater than the thickness of the foam body 3, the hot melt adhesive layer 31 will adhere to the sharp foreign object 4 and enter the foam body 3 to fill it, and enter the inner wall 23 of the tread to fill the tread 21, thereby achieving the function of preventing penetration and filling the gaps between the inner wall 23 of the tread and the tread 21 and the sharp foreign object 4, and at the same time, it can also avoid the problem of being unable to drive normally due to air leakage.

[0035] like Figure 7 and Figure 8As shown, the embodiment of the present application provides another embodiment structure of a noise-reducing and air-leakage-proof tread structure. In this embodiment, the foam body 3 is simultaneously attached to the inner wall 24 of the sidewall, so that the foam body 3 surrounds the inner side of the tire body 2 along the inner wall 23 of the tread and the inner wall 24 of the sidewall, and a hot-melt adhesive layer 31 is provided between the foam body 3 and the inner wall 23 of the tread and the inner wall 24 of the sidewall, so that the foam body 3 is stably attached to the inner wall 23 of the tread and the inner wall 24 of the sidewall. When the tire body 2 and the wheel frame are assembled and the tread 21 rubs against the ground to generate vibration, the foam body 3 on the inner wall 23 of the tread can absorb its vibration frequency, and the foam body 3 can also absorb the air vibration inside the tire body 2 to reduce the noise generated by the vibration of the tire body 2. When a sharp foreign object 4 punctures the tread 21, the foam body 3 with a certain thickness can absorb the vibration due to its elasticity. The sharp foreign matter 4 is covered, and the hot melt adhesive layer 31 thereof will adhere to the sharp foreign matter 4 and enter the foam body 3 to fill it, and enter the inner wall 23 of the tread and the tread 21 to fill it. In addition, when the sharp foreign matter 4 punctures the tire edge 22, the foam body 3 having a certain thickness elastically covers the sharp foreign matter 4, and the hot melt adhesive layer 31 will adhere to the sharp foreign matter 4 and enter the foam body 3 to fill it, and enter the inner wall 24 of the tire edge and the tire edge 22 to fill it, thereby achieving the function of preventing penetration and filling the gap. In addition, when the tire edge 22 is cut or slashed by a foreign matter, the tire edge 22 can be tightly bonded between the foam body 3 and the inner wall 24 of the tire edge, and the cut or slash can be filled with the hot melt adhesive material 31 to avoid the cut or slash of the tire edge 22 from causing an instantaneous explosion or continuous expansion, thereby increasing the strength of the tire body 2.

[0036] The above are only preferred embodiments of the present application and cannot limit the scope of protection of the present application. All changes and modifications made within the scope of the present application belong to the scope of protection of the present application.

Claims

1. A noise-reducing and air-leak-proof tire structure, characterized in that: include: A carcass (2), wherein the carcass (2) has a tread inner wall (23) and a sidewall inner wall (24) on its inner side, and the carcass (2) has an intra-tire cavity (25) inside, wherein the intra-tire cavity (25) is surrounded by the tread inner wall (23) and the sidewall inner wall (24); A foam body (3), the foam body (3) is attached to the inner wall of the tread (23), and a hot melt adhesive layer (31) is provided between the foam body (3) and the inner wall of the tread (23), and the hot melt adhesive layer (31) is used to attach the foam body (3) to the inner wall of the tread (23).

2. The noise-reducing and air-leak-proof tire structure according to claim 1, characterized in that: The tire body (2) comprises a tread (21) and a tire sidewall (22), wherein the tire sidewall (22) is located on both sides of the tread (21), and the foam body (3) is simultaneously attached to the tire sidewall inner wall (24), and a hot melt adhesive layer (31) is provided between the foam body (3) and the tire sidewall inner wall (24).

3. The noise-reducing and air-leak-proof tire structure according to claim 1, characterized in that: The tread inner wall (23) is disposed on the inner side of the carcass (2), and the foam body (3) is disposed on the inner side of the carcass (2) along the tread inner wall (23).

4. The noise-reducing and air-leak-proof tire structure according to claim 1, characterized in that: The density of the foaming material of the foam (3) is 30 kg / m 3 ~40kg / m 3 .

5. The noise-reducing and air-leak-proof tire structure according to claim 4, characterized in that: The foaming material is selected from at least one of thermoplastic polyurethane, thermoplastic elastomer, ethylene-vinyl acetate copolymer, polyethylene and rubber.

6. The noise-reducing and air-leak-proof tire structure according to claim 1, characterized in that: The material of the hot melt adhesive layer (31) is selected from at least one of rosin resin hot melt adhesive, ethylene-vinyl acetate copolymer hot melt adhesive and polyolefin hot melt adhesive.

7. The noise-reducing and air-leak-proof tire structure according to claim 6, characterized in that: The material of the hot melt adhesive layer (31) is nano hot melt adhesive.

8. The noise-reducing and air-leak-proof tire structure according to claim 7, characterized in that: The material of the hot melt adhesive layer (31) has a melting viscosity of 18000 cps within a temperature range of -35°C to 120°C.

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