Ring part structure for improving internal crack of tire bead seam allowance
By setting up a U-shaped steel wire, reinforcement film and second steel wire reinforcement between the inner lined composite part of the tire and the wear-resistant adhesive on the sidewall, the problem of circumferential cracking of the inner lined composite part caused by overload or improper use of the tire ring part is solved, which improves tear resistance and reduces quality risks.
Patent Information
- Application Number
- CN202411979920.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-02-25
AI Technical Summary
The existing ring structure of all-steel load radial tires is prone to overload or improper use during use, causing stress concentration at the inner reverse wrap point of the steel wire reinforcement, resulting in the problem of circumference cracking of the inner lining composite parts.
By providing a U-shaped first steel wire between the inner lined composite member and the sidewall wear-resistant glue, and connecting the reinforcement film on the outer side and adding the second steel wire reinforcement on the inner side, an improvement mechanism is formed to improve the modulus at the inner reverse wrap point on the first steel wire and tear resistance of the inner lined composite member.
It effectively improves the stress resistance at the inner reverse wrap point of the steel wire reinforcement during use, reduces the quality risk of cracking in the mouth of the inner lining composite parts, and avoids the problem of circumferential cracking.
Smart Images
Figure CN119502608A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of radial tires, in particular to a tire bead structure for improving inner cracks of a tire bead. Background Art
[0002] Tires are donut-shaped elastic rubber products installed on various vehicles or machinery, usually installed on metal rims, used to support the vehicle body, cushion external impacts, and achieve contact with the road surface, thereby ensuring the vehicle's driving performance. Tires are generally composed of an inner tube and an outer tube. Modern tires are mostly tubeless designs, that is, radial tires, and the tire rim usually refers to the bead part of the tire, which is the key area where the tire contacts and fixes the rim (wheel rim). It mainly consists of three parts: cord layer edging, steel ring (also called rim) and bead cover (also called bead cloth).
[0003] The existing common all-steel load-bearing radial tire bead structure design often has the problem of stress concentration at the end point of the steel wire reinforcement inner turn-up point due to vehicle overloading or improper use during use, resulting in cracks in the circumference of the liner composite part. Based on this, a bead structure for improving the internal cracks at the bead edge is now provided, which can eliminate the disadvantages of the existing device. Summary of the invention
[0004] The object of the present invention is to provide a bead structure for improving the inner crack of the bead edge, so as to solve the problems in the background technology.
[0005] To achieve the above object, the present invention provides the following technical solutions:
[0006] A ring structure for improving inner cracking of a tire bead, comprising a tire, wherein a steel ring for support is provided on the tire, a rubber core is sleeved on the outer side of the steel ring, an inner lining composite is sleeved on the outer wall of the rubber core, a sidewall wear-resistant rubber is sleeved on the outer wall of the inner lining composite, a carcass outer turn-up point is formed on the inner lining composite, the carcass outer turn-up point is located above one end of a steel wire reinforced outer turn-up point, and an improvement mechanism for improving inner cracking of a tire bead bead is provided on the inner lining composite.
[0007] On the basis of the above technical solution, the present invention also provides the following optional technical solution:
[0008] In an optional solution: the improvement mechanism includes:
[0009] A support assembly disposed on the liner composite;
[0010] The support component is a first steel wire disposed between the inner liner composite and the sidewall wear-resistant rubber. The first steel wire is U-shaped. One end of the first steel wire is formed with a steel wire reinforcement outer turn-up point, and the other end of the first steel wire is formed with a steel wire reinforcement inner turn-up point.
[0011] A first reinforcement component is arranged on the first steel wire.
[0012] In an optional solution: the first reinforcing component is a reinforcing rubber sheet arranged on the outside of the first steel wire, the reinforcing rubber sheet is completely in contact with the outer wall of the first steel wire, the reinforcing rubber sheet is sleeved on the outer wall of the inner turn-up point of the steel wire reinforcement on the first steel wire, the reinforcing rubber sheet is completely in contact with the inner wall of the lining composite part, one end of the reinforcing rubber sheet is formed with a reinforcing rubber sheet lower end point, and the other end of the reinforcing rubber sheet is formed with a reinforcing rubber sheet upper end point;
[0013] A second reinforcement component is arranged on the first steel wire.
[0014] In an optional solution: the second reinforcement component is a second steel wire arranged inside the first steel wire, one end of the second steel wire is formed with a newly added reinforcement steel wire lower endpoint, and the other end of the second steel wire is formed with a newly added reinforcement steel wire upper endpoint.
[0015] In an optional scheme: auxiliary line a and auxiliary line b are respectively provided on the tire, and the auxiliary line a and auxiliary line b intersect each other. The intersection of the auxiliary line a and auxiliary line b is located at the end of the outer turn-up point of the carcass body, the auxiliary line a is the horizontal height of the outer turn-up point of the carcass body, and the auxiliary line b is the outer turn-up point of the carcass body perpendicular to the inner contour line of the carcass body.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] By improving the mechanism, the present invention can increase the modulus of the inner turn-up end point of the first steel wire during use of the tire, improve the tear resistance of the liner composite at the inner end point of the first steel wire, reduce the quality risk of internal cracking of the product mouth, and effectively improve the problem of stress concentration at the end point of the steel wire reinforcement inner turn-up point due to vehicle overloading or improper use during use of the tire, thereby causing circumferential cracking of the liner composite. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the present invention.
[0019] Figure 2 This is a schematic diagram of the newly added reinforcement structure of the present invention.
[0020] Notes on the accompanying figures: 1. External turn-up point for tire body; 2. External turn-up point for steel wire reinforcement; 3. Rubber core; 4. Steel rim; 5. Wear-resistant rubber for sidewall; 6. Composite lining; 7. Internal turn-up point for steel wire reinforcement; 8. Lower end point for reinforcing rubber sheet; 9. Upper end point for reinforcing rubber sheet; 10. Lower end point for newly added reinforcing steel wire; 11. Upper end point for newly added reinforcing steel wire. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0022] In one embodiment, Figure 1-Figure 2 As shown, a tire ring structure for improving the inner crack of the tire bead, comprising a tire, a steel ring 4 for support is provided on the tire, a rubber core 3 is sleeved on the outer side of the steel ring 4, an inner lining composite 6 is sleeved on the outer wall of the rubber core 3, a sidewall wear-resistant rubber 5 is sleeved on the outer wall of the inner lining composite 6, a tire outer turn-up point 1 is formed on the inner lining composite 6, the tire outer turn-up point 1 is located above one end of the steel wire reinforcement outer turn-up point 2, and an improvement mechanism for improving the inner crack of the tire bead is provided on the inner lining composite 6;
[0023] The improved mechanism includes: a support assembly disposed on the liner composite member 6;
[0024] The supporting component is a first steel wire disposed between the inner liner composite 6 and the sidewall wear-resistant rubber 5. The first steel wire is U-shaped. One end of the first steel wire is formed with a steel wire reinforcement outer turn-up point 2, and the other end of the first steel wire is formed with a steel wire reinforcement inner turn-up point 7.
[0025] A first reinforcement component is arranged on the first steel wire;
[0026] The first reinforcing component is a reinforcing film arranged outside the first steel wire, the reinforcing film is completely in contact with the outer wall of the first steel wire, the reinforcing film is sleeved on the outer wall of the steel wire reinforcement inner turn-up point 7 on the first steel wire, the reinforcing film is completely in contact with the inner wall of the lining composite part 6, one end of the reinforcing film is formed with a reinforcing film lower end point 8, and the other end of the reinforcing film is formed with a reinforcing film upper end point 9;
[0027] A second reinforcement component is arranged on the first steel wire;
[0028] The second reinforcement component is a second steel wire arranged inside the first steel wire, one end of the second steel wire is formed with a newly added reinforcement steel wire lower end point 10, and the other end of the second steel wire is formed with a newly added reinforcement steel wire upper end point 11;
[0029] In this embodiment, it is necessary to particularly explain: Figure 1 This is a schematic diagram of the existing tire structure without additional reinforcement;
[0030] The inner end point of the first steel wire is protected by adding a reinforcing rubber sheet on the carcass side of the steel wire reinforcement inner turn-up point 7 and adding a second steel wire reinforcement on the inner side, so that the modulus of the reinforced inner turn-up point 7 on the first steel wire is increased during the use of the tire, the tear resistance of the liner composite part 6 at the inner end point of the first steel wire is improved, and the quality risk of the product inner crack is reduced, which effectively solves the problem that the stress concentration at the end point of the steel wire reinforcement inner turn-up point 7 during the actual use of the tire is easily caused by overloading or improper use, resulting in circumferential cracking of the liner composite part 6;
[0031] The reinforcing film needs to use a high modulus formula, which is the same as the formula for the end coating of ordinary steel wire parts. The second steel wire needs to be made of a material with a smaller wire diameter than the U-shaped steel cloth and a lower calendering density, but not less than 30epd.
[0032] In one embodiment, Figure 2 As shown, auxiliary lines a and b are respectively arranged on the tire, and the auxiliary lines a and b intersect each other. The intersection of the auxiliary lines a and b is located at the end of the outer turn-up point 1 of the carcass body. The auxiliary line a is the horizontal height of the outer turn-up point 1 of the carcass body, and the auxiliary line b is the outer turn-up point 1 of the carcass body perpendicular to the inner contour line of the carcass body.
[0033] The above embodiment discloses a bead structure for improving the inner crack of the bead, wherein the inner end point of the first steel wire is protected by adding a reinforcing rubber sheet on the carcass side of the steel wire reinforcement inner turn-up point 7 and adding a second steel wire reinforcement on the inner side, so that during the use of the tire, the modulus of the reinforced inner turn-up point 7 on the first steel wire is increased, the tear resistance of the liner composite 6 at the inner end point on the first steel wire is improved, and the quality risk of the product bead crack is reduced, effectively solving the problem that the stress concentration at the end point of the steel wire reinforcement inner turn-up point 7 during actual use of the tire due to overloading or improper use, etc., causes the circumferential cracking of the liner composite 6;
[0034] During production, the height of the steel wire reinforcement inner turn-up point 7 can preferably be within a certain range of the auxiliary line a. The height of the steel wire reinforcement inner turn-up point 7 can float up and down within a certain range of the auxiliary line a, but cannot be lower than the inner end point of the sidewall wear-resistant rubber 5 + 10mm, and cannot be higher than the auxiliary line b + 15mm;
[0035] The reinforcing film needs to use a high modulus formula, which is the same as the formula for the end of ordinary steel wire parts, with a thickness of 0.5-2.0mm. The width setting is to add a new upper end point 11 of the reinforcing steel wire, which must be higher than the upper end point 9 of the reinforcing film by more than 10mm. The new lower end point 10 of the reinforcing steel wire must be lower than the inner reverse point 7 of the steel wire reinforcement, and there is no lower limit. Based on cost considerations, the total width can be controlled to ≤100mm;
[0036] The second steel wire needs to be made of a material with a smaller wire diameter than the U-shaped steel cloth and a lower calendering density, but not less than 30epd. The width of the reinforcement material is set by the upper end point 9 of the reinforcement film, which must be higher than the inner turn-up point 7 of the steel wire reinforcement by more than 15mm, and the lower end point 8 of the reinforcement film must be lower than the inner turn-up point 7 of the steel wire reinforcement by more than 15mm. The total width is ≤60mm.
[0037] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A tire structure for improving the inner crack of the tire bead, comprising a tire, wherein a steel ring (4) for support is provided on the tire, a rubber core (3) is sleeved on the outer side of the steel ring (4), an inner lining composite (6) is sleeved on the outer wall of the rubber core (3), a sidewall wear-resistant rubber (5) is sleeved on the outer wall of the inner lining composite (6), a tire outer turn-up point (1) is formed on the inner lining composite (6), and the tire outer turn-up point (1) is located above one end of a steel wire reinforcement outer turn-up point (2), characterized in that: The inner lining composite part (6) is provided with an improvement mechanism for improving the internal cracking of the tire bead.
2. A bead structure for improving inner cracking of bead bead according to claim 1, characterized in that: The improvement mechanism comprises: a support assembly arranged on the lining composite component (6); The support component is a first steel wire arranged between the inner lining composite component (6) and the sidewall wear-resistant rubber (5), the first steel wire is U-shaped, one end of the first steel wire is formed with a steel wire reinforcement outer turn-up point (2), and the other end of the first steel wire is formed with a steel wire reinforcement inner turn-up point (7); A first reinforcement component is arranged on the first steel wire.
3. A bead structure for improving inner cracking of bead bead according to claim 2, characterized in that: The first reinforcing component is a reinforcing rubber sheet arranged on the outside of the first steel wire, the reinforcing rubber sheet is completely in contact with the outer wall of the first steel wire, the reinforcing rubber sheet is sleeved on the outer wall of the steel wire reinforcement inner turn-up point (7) on the first steel wire, the reinforcing rubber sheet is completely in contact with the inner wall of the lining composite part (6), one end of the reinforcing rubber sheet is formed with a reinforcing rubber sheet lower end point (8), and the other end of the reinforcing rubber sheet is formed with a reinforcing rubber sheet upper end point (9); A second reinforcement component is arranged on the first steel wire.
4. A bead structure for improving inner cracking of bead bead according to claim 3, characterized in that: The second reinforcement component is a second steel wire arranged inside the first steel wire, one end of the second steel wire is formed with a newly added reinforcement steel wire lower end point (10), and the other end of the second steel wire is formed with a newly added reinforcement steel wire upper end point (11).
5. A bead structure for improving inner cracking of bead bead according to claim 4, characterized in that: The tire is provided with auxiliary lines a and b, respectively. The auxiliary lines a and b intersect each other. The intersection of the auxiliary lines a and b is located at the end of the outer turn-up point (1) of the tire body. The auxiliary line a is at the horizontal height of the outer turn-up point (1) of the tire body, and the auxiliary line b is at the outer turn-up point (1) of the tire body perpendicular to the inner contour line of the tire body.