An asymmetric ply and belt synergistic reinforcement tire

Abstract

The utility model discloses a kind of asymmetric ply and belt layer synergic reinforced tire, belong to automobile tire technical field, including carcass, crown belt layer, belt layer and asymmetric ply, the outermost side of carcass is provided with tread rubber layer, the innermost side is provided with air-tight layer, crown belt layer is set in the downside of tread rubber layer, belt layer is set in the downside of crown belt layer, the both ends of belt layer are covered with rubber-coated structure, asymmetric ply is set between belt layer and air-tight layer. Solve the problem in prior art due to traditional ply is symmetrical uniform weaving structure and the interface adhesion strength between belt layer and ply is insufficient, and the stress concentration of tire shoulder area is prone to under the action of dynamic load, accelerate wear and delamination and prone to delamination failure. The utility model improves the durability and high-speed performance of tire, with significant progress.

Description

Technical Field

[0001] This utility model relates to the field of automobile tire technology, specifically to a tire with synergistic reinforcement of asymmetric ply and belt layer. Background Technology

[0002] Radial tires are a modern tire construction where the cords of the carcass layers are arranged radially, perpendicular to the centerline of the tire crown, resembling the meridians of the Earth. This structure makes the sidewalls more flexible, thereby improving ride comfort, reducing rolling resistance, and enhancing fuel economy. Simultaneously, the belt layers typically use high-strength steel cords to tightly bind the tire crown, effectively increasing tread rigidity, wear resistance, and handling stability. Currently, radial tires have become the mainstream product in both passenger and commercial vehicle markets.

[0003] However, existing radial tires still have some shortcomings in their structural design. On the one hand, traditional ply layers often use a symmetrical uniform weave structure, which makes the tire shoulder area prone to stress concentration under dynamic loads, exacerbating uneven wear and the risk of delamination. On the other hand, the interfacial bonding strength between the belt layer and the ply layer is insufficient, especially under high-speed and high-load conditions, which can easily lead to delamination failure, affecting the overall durability of the tire and high-speed driving safety.

[0004] Therefore, how to provide a tire with synergistic reinforcement of asymmetric ply and belt layer to overcome the defects in the existing technology is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] To address this issue, the present invention provides an asymmetric ply and belt layer synergistically reinforced tire, which solves the problems in the prior art where the traditional ply has a symmetrical uniform weave structure and the interfacial bonding strength between the belt layer and the ply is insufficient, leading to stress concentration in the tire shoulder area under dynamic load, accelerated wear and delamination, and easy delamination failure.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses an asymmetric ply and belt layer synergistically reinforced tire, comprising:

[0008] The tire body has a tread rubber layer on the outermost side and an airtight layer on the innermost side.

[0009] The crown layer is disposed on the underside of the tread rubber layer;

[0010] A belt layer is disposed on the underside of the crown belt layer, and both ends of the belt layer are covered with an adhesive structure.

[0011] An asymmetric fabric layer is disposed between the belt layer and the airtight layer.

[0012] Furthermore, the asymmetric ply includes a high-density portion, a transition portion, and a low-density portion. The high-density portion is disposed in the crown region of the tire carcass, the low-density portion is disposed in the shoulder and sidewall regions of the tire carcass, and the transition portion is disposed between the high-density portion and the low-density portion.

[0013] Furthermore, the high-density section has 200 cords, the low-density section has 150 cords, and the transition section has a cord count that gradually decreases from 200 to 150, with a gradual change in angle.

[0014] Furthermore, the high-density section employs double rib knitting, while the low-density section employs single rib knitting.

[0015] Furthermore, the overmolded structure covers the end of the belt layer in a "C" shape.

[0016] Furthermore, the length of the overmolded structure is 50 mm.

[0017] This utility model has the following advantages:

[0018] This invention, by setting an asymmetric ply layer, enhances the rigidity and impact resistance of the tire crown area, while increasing the flexibility of the shoulder and sidewall areas. This effectively disperses stress, significantly reduces stress concentration in the shoulder area, thereby slowing down irregular wear and fatigue cracking, and extending the tire's service life.

[0019] By setting up an adhesive-coated structure, the bonding strength and synergy between the belt layer and the asymmetric fabric layer are enhanced, effectively suppressing interlayer shear stress and preventing delamination under harsh conditions such as high-speed operation, sharp turns, or heavy loads.

[0020] The synergistic effect of the asymmetric ply and rubber coating structure makes the tire more robust and enhances its high-speed durability, exhibiting excellent high-speed durability performance. Attached Figure Description

[0021] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0023] Figure 1 A cross-sectional view of the asymmetric ply and belt layer synergistically reinforced tire provided by this utility model;

[0024] Figure 2 A diagram of the asymmetric fabric layer structure provided by this utility model;

[0025] Figure 3 A schematic diagram of the coating structure provided by this utility model.

[0026] In the diagram: 1. Tire carcass; 2. Tread rubber layer; 3. Airtight layer; 4. Crown layer; 5. Belt layer; 6. Rubber-coated structure; 7. Asymmetric ply; 71. High-density section; 72. Transition section; 73. Low-density section. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Please refer to Figures 1-3 The present invention discloses a tire with synergistic reinforcement of asymmetric ply and belt layer. The present invention consists of four parts, as follows: Figure 1 As shown, the tire includes a carcass 1, a crown belt layer 4, a belt layer 5, and an asymmetric ply layer 7. The outermost part of the carcass 1 is provided with a tread rubber layer 2, and the innermost part is provided with an airtight layer 3. The crown belt layer 4 is located below the tread rubber layer 2, and the belt layer 5 is located below the crown belt layer 4. Both ends of the belt layer 5 are covered with rubber-coated structures 6. The asymmetric ply layer 7 is located between the belt layer 5 and the airtight layer 3.

[0029] In this embodiment, the tire carcass 1, tread rubber layer 2, crown belt layer 4, belt layer 5, and airtight layer 3 are all common tire structures in the prior art. The tire carcass 1 is divided into a crown area and a shoulder / sidewall area according to its structure. According to its layer structure, it is divided into tread rubber layer 2, crown belt layer 4, belt layer 5, asymmetric ply layer 7, and airtight layer 3 from top to bottom.

[0030] By setting the asymmetric ply layer 7, the impact resistance of the crown area is enhanced, and the flexibility of the shoulder and sidewall areas is increased, so that the stress can be effectively dispersed, significantly reducing the stress concentration phenomenon in the shoulder area, thereby slowing down the irregular wear and fatigue cracks and extending the service life of the tire.

[0031] By setting the overcoating structure 6, the bonding strength and synergy between the belt layer 5 and the asymmetric fabric layer 7 are enhanced, effectively suppressing interlayer shear stress and preventing delamination under harsh working conditions such as high-speed operation, sharp turns or heavy loads.

[0032] Through the synergistic effect of the asymmetric ply 7 and the rubber coating structure 6, the tire has stronger overall integrity and enhanced high-speed durability, exhibiting excellent high-speed durability performance.

[0033] like Figure 2 As shown, the asymmetric ply 7 includes a high-density section 71, a transition section 72, and a low-density section 73. The high-density section 71 is located in the crown area of ​​the tire carcass 1, the low-density section 73 is located in the shoulder and sidewall areas of the tire carcass 1, and the transition section 72 is located between the high-density section 71 and the low-density section 73. Preferably, the high-density section 71 has 200 cords, the low-density section 73 has 150 cords, and the number of cords in the transition section 72 decreases from 200 to 150 in a stepped manner with a gradual change in angle. Preferably, the high-density section 71 uses double rib weave, and the low-density section 73 uses single rib weave.

[0034] In this embodiment, the high-density section 71 is made of 200 cords woven in a double rib pattern, and the low-density section 73 is made of 150 cords woven in a single rib pattern. The transition section 72 adopts a stepped decreasing structure, combined with a gradual change in angle, to connect the high-density section 71 and the low-density section 73, achieving a smooth transition and matching of stiffness between the crown area and the shoulder / sidewall area. The high-density section 71 is concentrated in the crown area and bears the main impact load; the low-density section 73 covers the shoulder and sidewall, increasing the flexibility of the shoulder and sidewall, so that stress can be effectively dispersed, bending deformation can be reduced, and tire wear and delamination can be significantly delayed.

[0035] The transition zone adopts a layout with a step-by-step decrease in cord density and a gradual transition in weaving angle, which achieves a smooth transition in mechanical properties from the high-density zone to the low-density zone, avoids sudden stress changes, and improves the overall reliability and durability of the tire structure.

[0036] like Figure 3 As shown, the overlay structure 6 is C-shaped and covers the end of the belt layer 5. Preferably, the length of the overlay structure 6 is 50 mm.

[0037] In this embodiment, the specific combination of the overmolding structure 6 and the belt layer 5 is as follows: Figure 3 As shown, the belt layer 5 is coated with adhesive through the cut area. The adhesive coating structure 6 has the same coating length and thickness on both the upper and lower sides of the belt layer 5. The C-shaped adhesive coating structure 6 enhances the bonding strength and synergy between the belt layer 5 and the fabric layer. This structure can effectively suppress interlayer shear stress and prevent delamination under harsh conditions such as high-speed operation, sharp turns, or heavy loads.

[0038] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A tire with synergistic reinforcement of asymmetric ply and belt layer, characterized in that, include: The tire body (1) has a tread rubber layer (2) on the outermost side and an airtight layer (3) on the innermost side. The crown layer (4) is disposed on the underside of the tread rubber layer (2); A belt layer (5) is disposed on the underside of the crown belt layer (4), and both ends of the belt layer (5) are covered with an adhesive structure (6). An asymmetric fabric layer (7) is disposed between the belt layer (5) and the airtight layer (3).

2. The asymmetric ply and belt layer synergistically reinforced tire as described in claim 1, characterized in that, The asymmetric ply (7) includes a high-density portion (71), a transition portion (72) and a low-density portion (73). The high-density portion (71) is disposed in the crown area of ​​the carcass (1), the low-density portion (73) is disposed in the shoulder and sidewall areas of the carcass (1), and the transition portion (72) is disposed between the high-density portion (71) and the low-density portion (73).

3. The asymmetric ply and belt layer synergistically reinforced tire as described in claim 2, characterized in that, The high-density section (71) has 200 cords, the low-density section (73) has 150 cords, and the transition section (72) has cords that gradually decrease from 200 to 150 with a progressively changing angle.

4. The asymmetric ply and belt layer synergistically reinforced tire as described in claim 3, characterized in that, The high-density section (71) is double rib knitted, and the low-density section (73) is single rib knitted.

5. The asymmetric ply and belt layer synergistically reinforced tire as described in claim 1, characterized in that, The overcoating structure (6) covers the end of the belt layer (5) in a "C" shape.

6. The asymmetric ply and belt layer synergistically reinforced tire as described in claim 5, characterized in that, The length of the encapsulated structure (6) is 50 mm.

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