All-steel truck radial tire steel wire cap strip structure

Abstract

The utility model relates to the technical field of automobile tires, and discloses an all-steel truck radial tire steel wire cap strip structure which comprises a tire crown, tire sidewalls are fixedly connected to the two sides of the tire crown, a covering layer is fixedly connected to the inner side wall of the tire crown, and an outer belted layer is fixedly connected to the inner side wall of the covering layer. An inner belted layer is fixedly connected to the inner side wall of the outer belted layer, a cord fabric layer is fixedly connected to the inner side wall of the inner belted layer, an airtight layer is fixedly connected to the inner side wall of the cord fabric layer, steel wire ropes are wound on the two sides, close to the outer belted layer, of the inner belted layer, and the other ends of the steel wire ropes are wound outside the outer belted layer. According to the steel wire cap strip structure of the all-steel truck radial tire, the double-layer staggered winding steel wire rope (the winding turn ratio of the inner layer to the outer layer is 1: 2) is adopted, so that stress distribution between the inner belted layer and the outer belted layer is optimized, periodic change of stress at a joint caused by traditional single-layer winding is avoided, the risk that a sizing material is separated from a steel wire is remarkably reduced, and the service life of the steel wire cap strip is prolonged. The service life of tires is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of automobile tire technology, specifically to a steel wire crown strip structure for an all-steel radial truck tire. Background Technology

[0002] During operation, especially at high speeds on rough roads, all-steel radial truck tires are susceptible to significant impact forces on the tire crown, leading to punctures, damage to the tread, and even damage to the belt layer structure. In existing technology, the zero-degree belt layer of all-steel radial tires typically consists of more than ten steel wires, with the zero-degree wires on both shoulders at a 0° angle, wound twice. However, this structure has the following drawbacks:

[0003] 1. Stress concentration at the joint: Due to the uneven material distribution at the joint and non-joint areas, the stress at the joint changes periodically during tire rolling, which can easily cause the rubber compound to separate from the steel wire, reducing the tire's service life.

[0004] 2. Stress mismatch between belt layer and zero-degree material: The existing structure has uneven stress distribution, which leads to stress mismatch between belt layer and zero-degree material, further affecting tire durability and safety. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a steel wire crown strip structure for all-steel radial truck tires, thereby solving at least one of the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a steel wire crown strip structure for an all-steel radial truck tire, comprising a crown, sidewalls fixedly connected to both sides of the crown, a cover layer fixedly connected to the inner wall of the crown, an outer belt layer fixedly connected to the inner wall of the cover layer, an inner belt layer fixedly connected to the inner wall of the outer belt layer, a ply layer fixedly connected to the inner wall of the inner belt layer, an airtight layer fixedly connected to the inner wall of the ply layer, and steel wire ropes wound around both sides of the inner belt layer near the outer belt layer, with the other end of the steel wire ropes wound to the outside of the outer belt layer.

[0007] Furthermore, the width of the outer belt layer is smaller than that of the inner belt layer, and the wire rope wound on the inner belt layer is located at the difference in width between the inner and outer belt layers.

[0008] Furthermore, the wire rope is bonded to the inner and outer belt layers through an adhesive coating.

[0009] Furthermore, the wire rope is wound in two layers, an inner layer and an outer layer, with the ratio of the number of turns of the inner wire rope to the number of turns of the outer wire rope being 1:2.

[0010] Furthermore, the total number of turns of the inner layer steel wire rope shall not be less than two, and the total number of turns of the outer layer steel wire rope shall not be less than four.

[0011] Furthermore, the wire rope is composed of three parallel steel wires with a width of 6mm and a wire specification of 3×7×0.20HE.

[0012] Furthermore, the two layers of steel wire ropes are staggered.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This type of all-steel radial truck tire steel wire crown strip structure, by adopting double-layer staggered winding steel wire rope (the ratio of the number of inner and outer windings is 1:2), optimizes the stress distribution between the inner and outer belt layers, avoids the periodic stress changes at the joint caused by traditional single-layer wide winding, significantly reduces the risk of the rubber compound and steel wire separating, and extends the tire service life;

[0015] 2. This type of all-steel radial truck tire steel wire crown strip structure has an outer belt layer width smaller than the inner belt layer, with the steel wire rope located at the width difference between the two and fixed by adhesive bonding. This ensures uniform stress distribution between the belt layer and the steel wire rope, reduces local damage caused by stress mismatch, and improves the stability and safety of the tire at high speeds. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall appearance of the present utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the tire crown and sidewall of this utility model;

[0018] Figure 3 This is a cross-sectional schematic diagram of the tire crown and sidewall of this utility model;

[0019] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 This is a cross-sectional schematic diagram of the inner belt layer, outer belt layer, and wire rope of this utility model;

[0021] Figure 6 This utility model Figure 5 Enlarged diagram of point B in the middle.

[0022] In the diagram: 1. Tire crown; 2. Airtight layer; 3. Inner belt layer; 4. Outer belt layer; 5. Steel cord; 6. Cord layer; 7. Overlay layer; 8. Sidewall. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figures 1-6 A steel wire crown strip structure for an all-steel radial truck tire includes a crown 1, with sidewalls 8 fixedly connected to both sides of the crown 1. A cover layer 7 is fixedly connected to the inner wall of the crown 1. An outer belt layer 4 is fixedly connected to the inner wall of the cover layer 7. An inner belt layer 3 is fixedly connected to the inner wall of the outer belt layer 4. A ply layer 6 is fixedly connected to the inner wall of the inner belt layer 3. An airtight layer 2 is fixedly connected to the inner wall of the ply layer 6. Steel wire ropes 5 are wound around both sides of the inner belt layer 3 near the outer belt layer 4, and the other end of the steel wire ropes 5 is wound to the outside of the outer belt layer 4.

[0025] like Figures 1 to 6 As shown, in the production of the steel wire crown strip structure of the all-steel radial truck tire of this utility model, when the steel wire rope 5 is first wound and connected to the inner belt layer 3 and the outer belt layer 4, it is wound around the inner belt layer 3 and the outer belt layer 4 in a circumferential direction. First, it is wound outward several times at the edge of the outer belt layer 4 (i.e. the upper surface of the inner belt layer 3), and then wound back in the opposite direction until the steel wire rope 5 is wound above the outer belt layer 4. After winding one side, the other side is wound, and finally a continuous and bilaterally symmetrical steel wire rope 5 is formed.

[0026] Next, the components such as the tire crown 1, tire sidewall 8, cover layer 7, cord layer 6, airtight layer 2, assembled steel wire rope 5, inner belt layer 3, and outer belt layer 4 are stacked sequentially on the molding machine. The cylindrical green tire is formed by rotating the bonding drum, ensuring that there is no slippage or air bubbles in each layer. Then, a high pressure of 20-30 bar is used to tightly bond the layers together, and the temperature is maintained at 150-160℃ for 10-30 minutes to allow the rubber to undergo a cross-linking reaction and form the final structure.

[0027] Through the spirally wound steel cord 5, during tire inflation or vulcanization stretching, the steel cord 5 automatically straightens or slightly bends according to parameter changes, integrating with the inner belt layer 3 and outer belt layer 4 or adjacent cover layer 7. This structure effectively suppresses the radial expansion and circumferential deformation of the shoulder (the arc surface between the tire crown 1 and the sidewall 8) after tire inflation, reduces creep at the center of the tire crown 1, and lowers the mutual stress between the inner belt layer 3 and outer belt layer 4, thereby significantly improving tire safety and extending overall service life.

[0028] In addition, the crown 1 uses a blend of synthetic rubber (such as styrene-butadiene rubber and cis-butadiene rubber) and natural rubber to enhance wear resistance and wet skid resistance;

[0029] The covering layer 7 is made of polyester or nylon fiber cord, which is treated with RFL impregnation (a mixture of resorcinol-formaldehyde resin and latex) to enhance its adhesion to rubber.

[0030] The fabric layer 6 can be made of polyester or nylon.

[0031] The airtight layer 2 is made of butyl rubber or halogenated butyl rubber, which has extremely low air permeability.

[0032] In a preferred embodiment of this invention, the width of the outer belt layer 4 is smaller than that of the inner belt layer 3, and the steel wire rope 5 wound on the inner belt layer 3 is located at the width difference between the inner belt layer 3 and the outer belt layer 4. The steel wire rope 5 is bonded to the inner belt layer 3 and the outer belt layer 4 by adhesive coating.

[0033] More specifically, this arrangement can improve the connection stability between the wire rope 5 and the inner belt layer 3 and the outer belt layer 4.

[0034] In a preferred embodiment of this invention, the wire rope 5 is wound in two layers, an inner layer 3 and an outer layer 4. The ratio of the number of turns in the inner layer to the outer layer is 1:2. The inner layer has at least two turns, and the outer layer has at least four turns. The wire rope 5 is composed of three parallel steel wires, each 6mm wide, with a wire specification of 3×7×0.20HE.

[0035] More specifically, the more steel wire ropes 5 there are, the better the effect will be.

[0036] As a preferred embodiment of this utility model, the two layers of steel wire ropes 5 are staggered.

[0037] More specifically, the staggered arrangement of the two layers of steel wire rope 5 allows them to fit together more tightly, further improving the overall effect.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A structure of steel cord for the crown of a steel radial truck tire, characterized in that: The device includes a tread (1), with sidewalls (8) fixedly connected to both sides of the tread (1). A cover layer (7) is fixedly connected to the inner wall of the tread (1). An outer belt layer (4) is fixedly connected to the inner wall of the cover layer (7). An inner belt layer (3) is fixedly connected to the inner wall of the outer belt layer (4). A ply layer (6) is fixedly connected to the inner wall of the inner belt layer (3). An airtight layer (2) is fixedly connected to the inner wall of the ply layer (6). Steel wire ropes (5) are wound around both sides of the inner belt layer (3) near the outer belt layer (4). The other end of the steel wire ropes (5) is wound to the outside of the outer belt layer (4).

2. The structure of the steel crown band of the all-steel truck and radial tire according to claim 1, characterized in that: The width of the outer belt layer (4) is smaller than that of the inner belt layer (3), and the wire rope (5) wound on the inner belt layer (3) is located at the difference in width between the inner belt layer (3) and the outer belt layer (4).

3. The structure of the steel crown band of the all-steel truck radial tire according to claim 2, characterized in that: The wire rope (5) is bonded to the inner belt layer (3) and the outer belt layer (4) by adhesive coating.

4. The structure of steel cord strip of the all-steel truck radial tire according to claim 3, characterized in that: The wire rope (5) is wound in two layers on the inner belt layer (3) and the outer belt layer (4), wherein the ratio of the number of turns of the inner wire rope (5) to the number of turns of the outer wire rope (5) is 1:

2.

5. The structure of steel cord strip of the all-steel truck radial tire according to claim 4, wherein: The total number of turns of the inner layer steel wire rope (5) shall not be less than two, and the total number of turns of the outer layer steel wire rope (5) shall not be less than four.

6. The structure of steel cord strip of the all-steel truck radial tire according to claim 5, characterized in that: The steel wire rope (5) is composed of three steel wires arranged side by side, with a width of 6mm and a wire specification of 3×7×0.20HE.

7. The structure of steel cord strip of the all-steel truck radial tire according to claim 6, characterized in that: The two layers of steel wire rope (5) are staggered.

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