Tire bead structure of all-steel radial tire

Abstract

The utility model discloses a tire bead structure of an all-steel radial tire, which belongs to the field of tire structures and comprises a sidewall rubber area, a wear-resistant rubber area, a steel wire wrapping cloth area, a reinforced steel wire wrapping cloth area, an isolation rubber area, a tire body steel cord area, a steel wire ring area, a lower apex area, a lining layer area and an upper apex area. A layer of reinforced steel wire wrapping cloth is additionally arranged between the steel wire wrapping cloth area and the tire body steel cord area, and the height values of all end points of the steel wire wrapping cloth area, the reinforced steel wire wrapping cloth area, the tire body steel cord area, the upper apex area and the lower apex area are configured in a staggered difference level mode, so that the stress concentration problem of all component materials can be solved; wherein the end point of the inner side of the reinforced steel wire wrapping cloth area is located in the center of the bottom of the steel wire ring area, the purpose of reinforcing the tire bead can be achieved, stretching from the tire sidewall to the tire bead part can be reduced, and the risk that the tire sidewall cracks is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tire technology, and mainly to a bead structure for an all-steel radial tire. Background Technology

[0002] With the increasing popularity of all-steel radial tires, tire bead structure technology is developing rapidly. Currently, most tires use a design where wear-resistant rubber wraps around steel wires and transitions to the carcass steel cords. The reverse-wrap portion of the carcass steel cords directly contacts the triangular rubber core inside the bead, and the contact between the carcass steel cords and the bottom of the steel bead is too tight. This results in a significant number of all-steel radial tires being damaged at the reverse-wrap end of the carcass and at the bottom of the steel bead.

[0003] Currently, nylon fiber is used as a transition material to reinforce the rubber and reinforcing skeleton material in the tire bead area, achieving stress transition between the tire carcass steel cord and the steel bead. However, due to the water absorption and poor heat resistance of nylon fibers, the adhesion between the rubber and nylon fibers is affected. Furthermore, the low strength and poor thermal stability of nylon fibers lead to large deformation of the tire sidewall material, limiting the overall strength improvement of the bead area. Utility Model Content

[0004] This invention aims to solve some problems existing in the prior art. Therefore, the purpose of this invention is to propose a bead structure for an all-steel radial tire. It employs a method of adding a layer of reinforcing steel wire wrapping between the inner sidewall of the protective rubber and the reinforcing material in the bead area. The various reinforcing materials in the bead area are distributed in a staggered manner to achieve stress dispersion. This not only effectively reduces deformation caused by stress tension in the tire sidewall but also enhances the strength of the bead area. By adjusting the height of the steel cord wrapping to form a staggered distribution, the goal of stress dispersion can be effectively achieved.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] A bead structure for an all-steel radial tire includes a sidewall rubber area, a wear-resistant rubber area, a steel wire wrapped area, a reinforcing steel wire wrapped area, a separator rubber area, a carcass steel cord area, a steel wire bead area, a lower triangular rubber area, an inner liner area, and an upper triangular rubber area.

[0007] The lower triangular rubber area and the upper triangular rubber area together form a triangular rubber area. The lower triangular rubber area is located inside the bead structure, and the upper triangular rubber area is located near the end face of the bead structure.

[0008] The steel wire ring area is located at the bottom of the lower triangular rubber area;

[0009] The carcass steel cord area is wrapped around the outside of the triangular rubber area;

[0010] The reinforcing steel wire wrapping area is wrapped around the outside of the tire carcass steel cord area and the triangular rubber area;

[0011] The steel wire wrapped area is wrapped around the outside of the reinforcing steel wire wrapped area;

[0012] The wear-resistant rubber area and the inner lining area are wrapped around the outside of the reinforcing steel wire wrapped area and the steel wire wrapped area;

[0013] The insulating rubber zone is located between the abrasion-resistant rubber zone and the steel wire-wrapped area;

[0014] The sidewall rubber area is located outside the wear-resistant rubber area.

[0015] Preferably, the wear-resistant rubber area, the steel wire covering area, the lower triangular rubber area, and the tire carcass steel cord area all have height values, including the height of the inner end point of the wear-resistant rubber area, the height of the outer wrapping of the steel wire covering area, the height of the lower triangular area, the height of the outer wrapping of the reinforcing steel wire covering area, the height of the outer wrapping of the tire carcass steel cord area, the height of the inner wrapping of the reinforcing steel wire covering area, and the height of the inner wrapping of the steel wire covering area.

[0016] Preferably, the height of the inner end point of the wear-resistant rubber area is greater than the height of the outer reverse wrapping of the steel wire covering area, the height of the lower triangular area, the height of the outer reverse wrapping of the reinforcing steel wire covering area, the height of the reverse wrapping of the carcass steel cord area, the height of the inner reverse wrapping of the reinforcing steel wire covering area, and the height of the inner reverse wrapping of the steel wire covering area.

[0017] Preferably, the height of the reinforcing steel wire covering area is higher than that of the steel wire covering area, and the cutting angle of the steel wire covering area is 30°.

[0018] Preferably, the steel wire wrapped area forms a certain angle with the carcass steel cord area, and the cutting angle of the steel wire wrapped area is 30° and the cutting width is 100m.

[0019] Preferably, the wire coil area is composed of several wire coils arranged from bottom to top as 7-8-9-10-9-8-7.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] Adding a layer of reinforcing steel wire wrapping between the steel wire wrapping area and the carcass steel cord area, and staggering the height values ​​of each endpoint of the steel wire wrapping area, reinforcing steel wire wrapping area, carcass steel cord area, upper triangular rubber area and lower triangular rubber area, can disperse the stress concentration problem of each component material. The inner endpoint of the reinforcing steel wire wrapping area is located at the bottom center of the steel wire bead area, which not only strengthens the tire bead, but also reduces the stretching of the tire sidewall to the bead area and reduces the risk of sidewall cracking.

[0022] The features and advantages of this utility model will be described in detail through embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the tire bead structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the steel wire ring area of ​​this utility model.

[0025] Figure label:

[0026] 1-Sidewall rubber area, 2-Abrasion-resistant rubber area, 3-Steel wire wrapped area, 4-Reinforced steel wire wrapped area, 5-Insulating rubber area, 6-Carcass steel cord area, 7-Steel wire bead area, 71-Steel wire bead, 8-Lower triangle rubber area, 9-Inner liner area, 10-Upper triangle rubber area;

[0027] H1 - Height of the inner end of the wear-resistant rubber zone; H2 - Height of the outer reverse wrap of the steel wire covering zone; H3 - Height of the lower triangular zone; H4 - Height of the outer reverse wrap of the reinforcing steel wire covering zone; H5 - Height of the reverse wrap of the carcass steel cord zone; H6 - Height of the inner reverse wrap of the reinforcing steel wire covering zone; H7 - Height of the inner reverse wrap of the steel wire covering zone. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0029] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses consistent with some aspects of this application as detailed in the appended claims.

[0030] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this utility model pertains. The words “a” or “one” and similar terms used in this application specification and claims do not indicate a limitation of quantity, but rather indicate the presence of at least one. “A plurality” includes two, equivalent to at least two. The words “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” covers the element or object listed following “comprising” or “including” and its equivalents, and does not exclude other elements or objects. The words “connected” or “linked” and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0031] Please refer to the following for details. Figure 1-2 A bead structure for an all-steel radial tire includes a sidewall rubber area 1, a wear-resistant rubber area 2, a steel wire wrapped area 3, a reinforcing steel wire wrapped area 4, a separator rubber area 5, a carcass steel cord area 6, a steel wire bead area 7, a lower triangular rubber area 8, an inner liner area 9, and an upper triangular rubber area 10. The lower triangular rubber area 8 and the upper triangular rubber area 10 form a triangular rubber area, with the lower triangular rubber area 8 located inside the bead structure and the upper triangular rubber area 10 located near the end face of the bead structure. 7 is located at the bottom of the lower triangular rubber area 8; the carcass steel cord area 6 is wrapped around the outside of the triangular rubber area; the reinforcing steel wire wrapping area 4 is wrapped around the outside of the carcass steel cord area 6 and the triangular rubber area; the steel wire wrapping area 3 is wrapped around the outside of the reinforcing steel wire wrapping area 4; the wear-resistant rubber area 2 and the inner liner area 9 are wrapped around the outside of the reinforcing steel wire wrapping area 4 and the steel wire wrapping area 3; the isolation rubber area 5 is located between the wear-resistant rubber area 2 and the steel wire wrapping area 3; the sidewall rubber area 1 is located outside the wear-resistant rubber area 2.

[0032] Based on the above implementation method, the tire sidewall rubber, wear-resistant rubber, steel wire wrapping, reinforcing steel wire wrapping, isolation rubber, carcass steel cord, upper triangular rubber, lower triangular rubber, and steel wire bead 71 are used as materials for the tire bead area. By adjusting the parameters of each component material, a material distribution variation level combination is achieved. Specifically, the wear-resistant rubber area 2, steel wire wrapping area 3, lower triangular rubber area 8, and carcass steel cord area 6 all have height values, including the inner end height H1 of the wear-resistant rubber area, the outer wrapping height H2 of the steel wire wrapping area, the lower triangular area height H3, the outer wrapping height H4 of the reinforcing steel wire wrapping area, the wrapping height H5 of the carcass steel cord area, the inner wrapping height H6 of the reinforcing steel wire wrapping area, and the inner wrapping height H7 of the steel wire wrapping area. Among them, the height of the inner end point of the wear-resistant rubber area H1 > the height of the outer reverse wrapping of the steel wire covering area H2 > the height of the lower triangular area H3 > the height of the outer reverse wrapping of the reinforcing steel wire covering area H4 > the height of the reverse wrapping of the carcass steel cord area H5 > the height of the inner reverse wrapping of the reinforcing steel wire covering area H6 > the height of the inner reverse wrapping of the steel wire covering area H7.

[0033] Furthermore, the reinforced steel wire wrapped area 4 is made of 2+2×0.25HT steel cord, and its height is higher than that of the steel wire wrapped area 3, which serves to protect the end point of the steel wire wrapped area 3. The single layer overlap is about 17mm, the cutting angle is 30°, and the forming adopts an external positioning method.

[0034] Furthermore, the steel wire covering area 3 uses high-strength 3×7×0.20HE steel cord as material. The steel wire covering material forms a certain angle with the carcass steel cord area 6. The height distribution on the inner and outer sides adopts the method of lower inner and higher outer. The highest point on the outer side is about 12mm away from the reverse end point of the carcass steel cord area 6. The steel wire covering calendering density is 45 strands / 100mm, the cutting angle is 30°, and the cutting width is 100m.

[0035] Furthermore, the tire carcass steel cord area 6, as the main component for tire load-bearing strength, has a reverse wrapping height point slightly lower than that of the steel wire wrapping area 3. It uses 3×0.22 / 9×0.20CCUT steel cord as material, with a calendering density of 63 cords / 100mm, a cutting angle of 90°, a cutting width of 665mm, and is symmetrically fitted at the center.

[0036] Furthermore, the height of the lower triangular rubber end point (highest point) is located between the outer wrapping height H4 of the reinforcing steel wire wrapping area and the wrapping height H5 of the carcass steel cord area. Its thickness ensures that the wrapping end point of the carcass steel cord area 6 is close to the center of the overall thickness of the bead, achieving the filling and reinforcement effect.

[0037] Furthermore, the wire loop 71 is wound with a 1400dtex / 2V2 single-layer winding method. Specifically, the wire loop area 7 is composed of several wire loops 71, which are arranged from bottom to top as 7-8-9-10-9-8-7.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bead structure for an all-steel radial tire, characterized in that, It includes the sidewall rubber area, wear-resistant rubber area, steel wire wrapped area, reinforced steel wire wrapped area, isolation rubber area, carcass steel cord area, steel wire bead area, lower triangle rubber area, inner liner area, and upper triangle rubber area; The lower triangular rubber area and the upper triangular rubber area together form a triangular rubber area. The lower triangular rubber area is located inside the bead structure, and the upper triangular rubber area is located near the end face of the bead structure. The steel wire ring area is located at the bottom of the lower triangular rubber area; The carcass steel cord area is wrapped around the outside of the triangular rubber area; The reinforcing steel wire wrapping area is wrapped around the outside of the tire carcass steel cord area and the triangular rubber area; The steel wire wrapped area is wrapped around the outside of the reinforcing steel wire wrapped area; The wear-resistant rubber area and the inner lining area are wrapped around the outside of the reinforcing steel wire wrapped area and the steel wire wrapped area; The insulating rubber zone is located between the abrasion-resistant rubber zone and the steel wire-wrapped area; The sidewall rubber area is located outside the wear-resistant rubber area.

2. The bead structure of the all-steel radial tire according to claim 1, characterized in that, The wear-resistant rubber area, steel wire covering area, lower triangular rubber area, and tire carcass steel cord area all have height values, including the inner end height of the wear-resistant rubber area, the outer reverse wrap height of the steel wire covering area, the height of the lower triangular area, the outer reverse wrap height of the reinforcing steel wire covering area, the reverse wrap height of the tire carcass steel cord area, the inner reverse wrap height of the reinforcing steel wire covering area, and the inner reverse wrap height of the steel wire covering area.

3. The bead structure of the all-steel radial tire according to claim 2, characterized in that, The height of the inner end point of the wear-resistant rubber zone > the height of the outer reverse wrapping of the steel wire covering zone > the height of the lower triangular zone > the height of the outer reverse wrapping of the reinforcing steel wire covering zone > the height of the reverse wrapping of the carcass steel cord zone > the height of the inner reverse wrapping of the reinforcing steel wire covering zone > the height of the inner reverse wrapping of the steel wire covering zone.

4. The bead structure of the all-steel radial tire according to claim 1, characterized in that, The height of the reinforcing steel wire wrapped area is higher than that of the steel wire wrapped area, and the cutting angle of the steel wire wrapped area is 30°.

5. The bead structure of the all-steel radial tire according to claim 1, characterized in that, The steel wire wrapped area forms a certain angle with the carcass steel cord area, and the cutting angle of the steel wire wrapped area is 30° and the cutting width is 100m.

6. The bead structure of the all-steel radial tire according to claim 1, characterized in that, The wire coil area is composed of several wire coils.

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