Belted layer separation structure of all-steel radial wide-base tire
By introducing filler rubber sheets to replace steel cords in the A belt layer of wide-base tires, combined with the synergistic effect of other belt layers, the problem of uneven bulges in the center of the tire crown is solved, improving tire life and performance, and saving material costs.
Patent Information
- Application Number
- CN202520793884.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-24
AI Technical Summary
In existing wide-base tire structures, the rigid constraint of steel cords in the center of the tread causes uneven inner contours, affecting tire performance and service life.
The tire adopts a separate belt layer structure for all-steel radial wide-base tires. By introducing filler film into the A belt layer to replace the three-part middle section of the steel cord, and combining the synergistic effect of the B, C, and D belt layers, the tire structure is optimized.
It effectively solves the problem of bulging in the inner contour crown, improves tire lifespan and saves on steel cord material costs, while also improving overall tire performance and handling.
Smart Images

Figure CN223919041U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wide-base tire technology, and in particular to a belt layer separation structure for an all-steel radial wide-base tire. Background Technology
[0002] Wide-base tires are a type of tire with unique design and performance characteristics. Compared to ordinary tires, they have a wider tread and a larger contact patch. This provides vehicles with better stability and handling during driving, especially at high speeds and when cornering, offering more reliable grip and reducing the risk of skidding. At the same time, the larger contact patch of wide-base tires effectively distributes vehicle weight, reducing pressure on the ground, thus reducing tire wear to some extent, extending tire life, and better adapting to various road conditions, providing a safer and more comfortable driving experience.
[0003] Existing technologies often have the following drawbacks: the existing structure of wide-base tires is a conventional four-layer belt structure, consisting of an inner liner, carcass cord, four belt layers, and tread from the inside out. However, the center of the tire crown is rigidly bound by steel cords, resulting in varying degrees of unevenness in the tire's inner contour, with the center of the crown bulging.
[0004] Therefore, this utility model provides a belt layer separation structure for all-steel radial wide-base tires. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies where the center of the tire crown is rigidly bound by steel cords, and to propose a belt layer separation structure for all-steel radial wide-base tires.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a separation structure for the belt layer of an all-steel radial wide-base tire, comprising a main body, wherein the main body comprises, from the inside to the outside, an inner liner, a carcass ply, an A belt layer, a B belt layer, a C belt layer, a D belt layer, and a tread, wherein the A belt layer is composed of symmetrical steel cords separated and then filled with a filler film in the middle, and the filler film replaces the three equal middle sections of the steel cords of the A belt layer.
[0007] The effects achieved by the above components are: while maintaining the overall structural strength of the tire, effectively solving the common problem of uneven tire interior caused by bulging in the inner contour crown of wide-base tires, saving the cost of steel cord materials, and improving tire service life.
[0008] Preferably, the filler film is made of rubber.
[0009] The aforementioned components achieve the following effects: they can both buffer and transition when the tire is under stress, and adapt to tire deformation, thus avoiding a decline in tire performance due to issues with the rubber material.
[0010] Preferably, the steel wire cord in the A belt layer is combined with the filler film.
[0011] The effect achieved by the above-mentioned components is that, while ensuring the rigidity and strength of the tire, the steel cord, in conjunction with the filler rubber, can achieve reasonable adjustment of the rigidity of the tire shoulder area, while meeting the overall mechanical performance requirements of the tire.
[0012] Preferably, the B belt layer, C belt layer, D belt layer and A belt layer work together.
[0013] The effect achieved by the above components is to work in synergy with the A belt layer to optimize tire performance under different road conditions.
[0014] Preferably, the inner lining layer protects the tire carcass fabric.
[0015] The effects achieved by the above components are: the inner liner can effectively prevent air leakage from the tire, while protecting the tire carcass ply and extending the tire's service life.
[0016] Preferably, the inner liner is made of butyl rubber material.
[0017] The effect achieved by the above components is that the material has good airtightness and aging resistance, which can better meet the functional requirements of the inner liner and ensure the normal use of the tire.
[0018] Preferably, the tread pattern is a buoyancy-type pattern.
[0019] The effects achieved by the above components are: the buoyancy-type tread pattern can improve the tire's grip, enhance the tire's driving performance on different road surfaces, and ensure the safety of vehicle driving.
[0020] In summary:
[0021] In this invention, the structure still maintains a four-layer belt structure. From the inside out, the tire consists of an inner liner, carcass cord, A belt layer, B belt layer, C belt layer, D belt layer, and tread. The difference from the traditional four-layer belt structure lies in separating the steel cords of the belt layer. The middle section, divided into three equal parts, is replaced with a rubber sheet for transition. From left to right, the layers are steel cord, rubber sheet filler, and steel cord again. The A belt layer is composed of symmetrically separated steel cords with a rubber sheet filling. Separating the steel cords of the A belt layer, replacing the middle section with a rubber sheet, ensures the rigidity of the tire shoulder while effectively solving the common problem of uneven tire surface and bulges in the inner crown of wide-base tires. This improves tire lifespan while saving on steel cord material costs. Attached Figure Description
[0022] Figure 1This is a three-dimensional structural diagram of the present invention.
[0023] Legend: 1. Inner liner; 2. Tread; 3. A belt layer; 4. B belt layer; 5. C belt layer; 6. D belt layer; 7. Carcass ply. Detailed Implementation
[0024] Reference Figure 1 As shown, this utility model provides a technical solution: a separation structure for the belt layer of an all-steel radial wide-base tire, comprising a main body.
[0025] The following is a detailed explanation of its overall setup and function.
[0026] In this implementation plan, the main body, from the inside out, includes an inner liner layer 1, a carcass ply 7, an A belt layer 3, a B belt layer 4, a C belt layer 5, a D belt layer 6, and a tread 2. The A belt layer 3 is composed of symmetrically separated steel cords with a filler film in the middle. The filler film replaces the three equal sections of the steel cords in the A belt layer. While maintaining the overall structural strength of the tire, this effectively solves the common problem of uneven tire interior caused by bulging in the inner crown of wide-base tires, and also saves on steel cord material costs and improves tire lifespan.
[0027] Specifically, the filler layer is made of rubber. It provides cushioning and transition when the tire is under stress, and adapts to tire deformation, preventing performance degradation due to filler material issues. In belt layer A (3), the steel cords work in conjunction with the filler layer. These steel cords, while ensuring tire rigidity and strength, work with the filler layer to achieve reasonable adjustment of the shoulder rigidity, while meeting the overall mechanical performance requirements of the tire. Belt layers B (4), C (5), and D (6) work synergistically with belt layer A to optimize tire performance under different road conditions. The inner liner 1 protects the tire carcass ply. It effectively prevents air leakage and protects the tire carcass ply, extending tire lifespan. Inner liner 1 is made of butyl rubber. This material has good airtightness and aging resistance, better meeting the functional requirements of the inner liner and ensuring normal tire use. The tread pattern 2 is a buoyancy-type tread pattern. Buoyancy-type tread patterns can improve tire grip, enhance tire performance on different road surfaces, and ensure vehicle safety.
[0028] Working principle: When a vehicle is in motion, the tire is subjected to various forces from the road surface. Traditional wide-base tires, due to the rigid constraint of steel cords in the center of the tread, suffer from an uneven inner tread surface with a raised center, affecting tire performance and lifespan. In the all-steel radial wide-base tire belt layer separation structure of this invention, belt layer A 3 adopts a design with steel cords separated and filled with a rubber sheet in the middle. During tire pressure and deformation, the rubber sheet in belt layer A 3 acts as a buffer and transition. When the tire tread is subjected to vertical pressure from the road surface, the rubber sheet can distribute the pressure more evenly to the steel cords on both sides and the entire belt layer structure, avoiding stress concentration in the center of the tread caused by the rigid constraint of the steel cords. This effectively solves the problem of an uneven inner tread surface with a raised center. Simultaneously, belt layers B 4, C 5, and D... The belt layers 6 work together according to a specific steel cord arrangement angle. They cooperate with belt layer A 3 to maintain the overall structural stability of the tire. Under different driving conditions such as turning, acceleration, and braking, each belt layer can reasonably distribute and transmit stress to ensure that the tire has good handling performance and grip. The inner liner layer 1 can effectively prevent air leakage inside the tire and ensure stable air pressure inside the tire, providing a basic condition for the normal operation of the tire. The tread pattern design of the tread 2 provides the necessary grip for the vehicle through friction with the road surface according to different driving needs, ensuring safe driving of the vehicle under various road conditions. By combining the coordinated work of these components, the tire structure of this utility model improves the overall performance and service life of the tire while ensuring the rigidity of the tire shoulder area, and saves the cost of steel cord materials.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
Claims
1. A full steel radial wide base tire belt separation structure comprising a main body, characterized by: The main body comprises, from inside to outside, an inner liner (1), a carcass ply (7), an A belt layer (3), a B belt layer (4), a C belt layer (5), a D belt layer (6) and a tread (2), the A belt layer (3) is composed of symmetric steel cord separated by filling rubber sheets, and the filling rubber sheets replace the middle third section of the steel cord of the A belt layer.
2. The full steel radial wide base tire belt separation structure of claim 1, wherein: The filling rubber sheet is made of rubber material.
3. The full steel radial wide base tire belt separation structure of claim 1, wherein: The steel cord in the A belt layer (3) cooperates with the filling rubber sheet.
4. The full steel radial wide base tire belt separation structure of claim 1, wherein: The B belt layer (4), the C belt layer (5), the D belt layer (6) and the A belt layer cooperate with each other.
5. The full steel radial wide base tire belt separation structure of claim 1, wherein: The inner liner (1) protects the carcass ply.
6. The full steel radial wide base tire belt separation structure of claim 1, wherein: The inner liner (1) is made of butyl rubber material.
7. The full steel radial wide base tire belt separation structure of claim 1, wherein: The tread (2) is of a buoyancy pattern.