Semi-steel radial limo tire with high-load and high-tire-bead durable structure

Abstract

The utility model discloses a semi-steel radial limo tire with a high-load and high-tire-bead durable structure, which relates to the technical field of tires and comprises a tire body, a tire bead is arranged on the outer side of the tire body, a tire side is arranged on one side, far away from the tire bead, of the tire body, a tire tread is arranged on one side of the tire side, a belted layer is arranged at the lower end of the tire tread, and a reinforcing layer is arranged between the tire body and the tire side. According to the semi-steel radial limo tire with the high-load and high-tire-bead durable structure, the tire side part adopts a multi-composite structure, so that the friction force between the tire bead part and the wear-resistant rubber and the friction force between the belted layer and the upper end of the tire side part under high load can be reduced, the heat generation is low, the premature wear and delamination of the shoulder part of the tire are reduced, and the service life of the tire is prolonged. The double-bead filler structure is arranged, the supporting effect of the ring part is provided, transmission of stress of the ring part to the tire side half part is borne, the nylon wrapping cloth is wound on the outer side of the steel wire, the adhesiveness is increased, the tire body and the tire side structure are fastened, dispersion of circumferential attaching force of the ring part is facilitated, and the durability of the tire bead is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of tires, in particular to a semi-steel radial caravan tire with a high-load and high-bead durability structure. Background Art

[0002] When heavy-duty off-road vehicles travel alternately on multiple road conditions such as highways, deserts, and muddy unpaved roads, in order to ensure the load resistance, tire bead durability and traction performance of the tire, methods such as strengthening the carcass structure at the bead position and improving the transmission performance of the friction force between the bead and the rim are usually adopted, thereby improving the tire bead durability, tread cut resistance, and vehicle load-bearing capacity. When ordinary tires are used for off-road driving, the existing ordinary tires have only two layers of carcass structure wrapped around the wire ring at the bead position, resulting in weak transmission force of the single bead sandwich, poor sidewall rigidity and pressure-bearing capacity. Because the unpaved road has many sharp edges and corners, the tire tread under high load has insufficient cut resistance due to the tread design shape, belt rigidity, large deformation of the belt and sidewall under high load, and high heat generation, which affects the tire's load-bearing capacity, puncture resistance and impact resistance, as well as the driving comfort of vehicles used alternately on multiple road conditions.

[0003] When a heavy off-road vehicle is stuck, it is usually necessary to reduce the tire pressure to increase the tire's contact area and improve grip to facilitate escape. However, the corresponding ordinary tires will have their axial rigidity further weakened under low pressure conditions, and the rim and tire bead will be prone to problems such as bead unseating and bulging due to the reduced pressure and increased load.

[0004] Based on this, a semi-steel radial RV tire with a high load-carrying capacity and high bead durability structure is now provided, which can eliminate the disadvantages of existing tires. Utility Model Content

[0005] The purpose of the utility model is to provide a semi-steel radial RV tire with a high-load and high-bead durability structure, so as to solve the problems in the background technology that the tread of the tire under high load affects the tire's load-bearing capacity, puncture resistance and impact resistance, and the driving comfort of vehicles used alternately on multiple road conditions, and is prone to bead unseating, bulging, etc.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A semi-steel radial RV tire with high load and high bead durability structure comprises a carcass, a bead is arranged on the outer side of the carcass, a sidewall is arranged on the side of the carcass away from the bead, a tread is arranged on one side of the sidewall, a belt layer is arranged at the lower end of the tread, and a reinforcement layer is arranged between the carcass and the sidewall.

[0008] Preferably, a high-strength fracture-resistant polyester fiber cord layer is provided inside the carcass. The high-strength fracture-resistant polyester fiber cord layer has a structure of 2 high and 1 low. The first cord layer is arranged on the outermost side inside the carcass. The overlapping amount of the carcass folding part on the inner circumferential side of the first cord layer and the maximum breaking width point on the inner circumference is w1, and w1 is 20 mm to 30 mm. The overlapping amount of the carcass folding part on the inner circumferential side of the second cord layer and the maximum breaking width point on the inner circumference is w2, and w2 is 5 mm to 10 mm. The overlapping amount of the carcass folding part on the inner circumferential side of the third cord layer and the maximum breaking width point on the inner circumference is w3, and w3 is 15 mm to 25 mm.

[0009] Preferably, the sidewall includes a chafer, steel wires, sidewall rubber, and wear-resistant rubber. The chafer is arranged at the end of the carcass. Steel wires are inserted inside the chafer. The sidewall rubber is arranged outside the chafer. The wear-resistant rubber is arranged at the lower end of the sidewall rubber.

[0010] Preferably, a first composite rubber reinforcing member is provided at the upper end of the sidewall. The first composite rubber reinforcing member is arranged between the belt layer and the carcass. The width of the first composite rubber reinforcing member is c, and c is 15 to 20 mm. The thickness of the first composite rubber reinforcing member is d, and d is 2 to 6 mm. A second composite rubber reinforcing member is provided at the lower end of the sidewall. The second composite rubber reinforcing member is arranged between the reinforcing layer and the wear-resistant rubber. The width of the second composite rubber reinforcing member is a, and a ≥ 1 / 3SH1 mm. The distance between the center point of the second composite rubber reinforcing member and the rim protection point is b, and b is 15 ± 3 mm.

[0011] Preferably, the belt layer has a double-layer outer "eight" - shaped structure. The angle of the outer "eight" is α, and α is 19° to 22°. The thickness of the belt layer is 1.50 to 1.80 mm. The diameter of the belt layer is 1.50 to 1.85 mm. A reinforcing member is provided between the belt layers. The reinforcing members are arranged on the surface of the lower belt layer evenly according to the α angle.

[0012] Preferably, the reinforcing layer has a double-layer reinforcing layer structure. The length of the staggered difference between the endpoints of the two reinforcing layers is l, and l is 15 to 20 mm. The length of any one of the reinforcing layers is G, and G ≥ 1 / 2SH1.

[0013] Preferably, the chafer has a double-chafer structure. The chafer includes an upper chafer composite rubber reinforcing member and a lower chafer composite rubber reinforcing member. The radial distance of the upper chafer composite rubber reinforcing member is e, and 15% < e / SH1 < 25%. The radial distance of the lower chafer composite rubber reinforcing member is f, and 40% < f / SH1 < 55%.

[0014] Preferably, the diameter of the steel wire is n, where n is 1.55-1.85 mm, and a nylon sheath is provided on the outside of the steel wire, where the thickness of the nylon sheath is m, where m≥0.8 mm.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The utility model provides a semi-steel radial RV tire with a high-load and high-bead durability structure. The sidewall structure adopts a multi-composite structure. This design can reduce the friction between the bead and the wear-resistant rubber, and the friction between the belt layer and the upper end of the sidewall under high load. The heat generation is low, and the premature wear and delamination of the tire shoulder is reduced. A double triangle rubber structure is provided to provide support for the bead and to undertake the transmission of the bead stress to the sidewall semi-components. Nylon wrapping cloth is wrapped around the outside of the steel wire to increase the adhesiveness and tightly lock the tire body and the sidewall structure, which is beneficial to the dispersion of the circumferential fitting force of the bead and enhances the durability of the bead. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the tire profile and the structure of the polyester fiber cord layer of the tire body of the utility model.

[0019] Figure 3 It is a schematic structural diagram of the sidewall of the utility model.

[0020] Figure 4 It is a schematic structural diagram of the tire sidewall upper portion of the utility model.

[0021] Figure 5 It is a schematic structural diagram of the lower part of the tire sidewall of the present invention.

[0022] Figure 6 It is a schematic diagram of laying out the belt layer of the utility model.

[0023] Figure 7 It is a schematic cross-sectional view of the belt layer of the utility model.

[0024] Figure 8 It is an enlarged schematic diagram of the reinforcing layer of the utility model.

[0025] Fig. 9 It is a structural schematic diagram of the reinforcement layer of the utility model.

[0026] Fig.10 It is a schematic structural diagram of the tread of the utility model.

[0027] Fig.11 It is an enlarged schematic diagram of the double apex adhesive of the utility model.

[0028] Fig.12 It is an enlarged schematic diagram of the steel wire of the present utility model.

[0029] Notes on figure numbers: 1. carcass; 2. bead; 3. sidewall; 4. tread; 5. belt layer; 6. reinforcement layer; 31. apex rubber; 32. steel wire; 33. sidewall rubber; 34. wear-resistant rubber; 35. first composite rubber reinforcement; 36. second composite rubber reinforcement; 37. reinforcement; 311. upper apex rubber composite rubber reinforcement; 312. lower apex rubber composite rubber reinforcement. DETAILED DESCRIPTION

[0030] 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.

[0031] Example 1

[0032] In this embodiment, if Figure 1-Figure 10 As shown, a semi-steel radial RV tire with a high-load and high-bead durability structure comprises a carcass 1, a bead 2 is arranged on the outer side of the carcass 1, a sidewall 3 is arranged on the side of the carcass 1 away from the bead 2, a tread 4 is arranged on one side of the sidewall 3, and the tread 4 is a semi-crescent-shaped meshing structure, which is convenient for increasing the rigidity of the middle part of the tread 4, making the force more uniform, and improving the grip performance of the tire during non-paved high-load use, improving the traction on gravel roads, enhancing the grip, improving the controllability, and improving the load capacity of heavy-duty off-road RVs, a belt layer 5 is arranged at the lower end of the tread 4, and a reinforcement layer 6 is arranged between the carcass 1 and the sidewall 3, which protects the tire and prolongs the service life of the tire;

[0033] Among them Figure 2 As shown, three layers of high-strength breaking force polyester fiber cord layers are arranged inside the carcass 1, and the three layers of high-strength breaking force polyester fiber cord layers are fully wrapped with steel wires 32. The high-strength breaking force polyester fiber cord layers are of a 2-high-1-low structure, the first cord layer and the third cord layer are of a high structure, and the second cord layer is of a low structure. This structure stabilizes the internal pressure of the tire during inflation, uniformly amplifies the inflation process, and avoids delamination of the bead portion. The first cord layer is arranged on the outermost side of the carcass 1, and the overlap amount of the inner peripheral side carcass folding portion of the first cord layer and the inner peripheral maximum breaking width point is The overlap between the inner circumference of the second layer of the carcass and the maximum width of the inner circumference is w2, w2 is 5mm-10mm, and the overlap between the inner circumference of the third layer of the carcass and the maximum width of the inner circumference is w3, w3 is 15mm-25mm. Compared with the two-layer carcass steel wire of the existing ordinary tire, the structural design has higher cord durability and carcass strength, while reducing the deformation of the bead, enhancing the rigidity of the sidewall 3 and taking into account comfort, and improving the durability of the bead.

[0034] Among them Figure 3-Figure 5As shown, the sidewall 3 includes an apex rubber 31, a steel wire 32, a sidewall rubber 33 and a wear-resistant rubber 34. The apex rubber 31 is arranged at the end of the carcass 1, and the steel wire 32 is inserted inside the apex rubber 31. The steel wire 32 inside the bead 2 can firmly fix the tire on the rim and make them combined together. The sidewall rubber 33 is arranged on the outside of the apex rubber 31, and the wear-resistant rubber 34 is arranged at the lower end of the sidewall rubber 33 to prevent the carcass 1 from being mechanically damaged, atmospherically affected and affected by moisture.

[0035] Among them Figure 3-Figure 5 As shown, a first composite rubber reinforcement 35 is provided at the upper end of the sidewall 3, and the first composite rubber reinforcement 35 is arranged between the belt layer 5 and the carcass 1. The width of the first composite rubber reinforcement 35 is c, c is 15-20 mm, and the thickness of the first composite rubber reinforcement 35 is d, d is 2-6 mm, which can increase the overall thickness of the shoulder, improve the strength of the shoulder, and increase the cut resistance and puncture resistance of the tire. A second composite rubber reinforcement 36 is provided at the lower end of the sidewall 3, and the second composite rubber reinforcement 36 is arranged between the reinforcement layer 6 and the wear-resistant rubber 34. The width of the second composite rubber reinforcement 36 is a, a≥1 / 3SH1mm, SH 1 represents the nominal lower break height, and the distance between the center point of the second composite rubber reinforcement 36 and the rim protection point is b, b is 15±3mm, which can reduce the friction between the tire bead 2 and the wear-resistant rubber 34, so that the second composite rubber reinforcement 36 has the characteristics of low heat generation and high viscosity modulus.

[0036] Among them Figure 6 and Figure 7 As shown, the belt layer 5 is a double-layer outer "eight" structure, the angle of the outer "eight" is α, α is 19°~22°, the thickness of the belt layer 5 is 1.50~1.80mm, the diameter of the belt layer 5 is 1.50~1.85mm, the breaking strength is greater than 1300N, and reinforcements 37 are arranged between the belt layers 5. The reinforcements 37 are evenly arranged on the surface of the belt layer 5 located below at an angle of α. Compared with the direct two-layer flat laying of the existing ordinary tire at an angle of 23°~29°, the structure of the belt layer 5 is more conducive to ensuring the shear stress dispersion between the belt layers 5 and the uniform distribution of the high-load downforce between the belt layer 5 and the tread 4, ensuring the stiffness of the tread 4 in the circumferential direction, and avoiding stress concentration causing premature shoulder delamination;

[0037] Among them Figure 8 and Fig. 9As shown, the reinforcing layer 6 has a double-layer reinforcing layer structure. The length of the staggered difference between the endpoints of the two reinforcing layers 6 is l, where l is 15 - 20 mm. The length of any one reinforcing layer 6 is G, and G ≥ 1 / 2SH1, where SH1 represents the nominal lower cut height. The reinforcing layer 6 uses high-viscosity rubber coating, enabling the fastening of the viscosity between the carcass 1 and the bead 3 at the lower part of the tire, thereby reducing the shear force, improving the dispersion of the circumferential adhesion force of the bead part, improving the premature delamination and separation of the bead part, and enhancing the bead durability.

[0038] Example 2

[0039] Differing from Example 1, as Fig.11 shown, the apex 31 has a double-apex structure. The apex 31 includes an upper apex composite rubber reinforcement 311 and a lower apex composite rubber reinforcement 312. The radial distance of the upper apex composite rubber reinforcement 311 is e, where 15% < e / SH1 < 25%. The radial distance of the lower apex composite rubber reinforcement 312 is f, where 40% < f / SH1 < 55%. The lower apex composite rubber reinforcement 312 provides a strong supporting effect, and the upper apex composite rubber reinforcement 311 has an elongated structure, enabling the transmission of the bead 2 stress to the sidewall 3 components.

[0040] Wherein, as Fig.12 shown, the diameter of the steel wire 32 is n, where n is 1.55 - 1.85 mm. The steel wire 32 has a hexagonal wire bead outer wrapping design. The breaking strength of the steel wire 32 ≥ 388 kg, the total number of roots ≥ 31, and the widest arrangement dimension ≥ 12 mm. A nylon wrapper is provided on the outer side of the steel wire 32, which tightly箍紧 the steel wire 32, capable of reducing the dispersion deformation of the steel wire bead force under high tire load, improving the bead load-bearing capacity. The thickness of the nylon wrapper is m, where m ≥ 0.8 mm. A rubber with low heat generation, high modulus, and high adhesion composite properties is used between the sidewall 3 and the bead 2 positions, which is more conducive to the dispersion of the circumferential shear force of the bead part and improves the bead durability of high-load tires under various road conditions.

[0041] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A semi-steel radial RV tire with a high load-bearing and high-bead durability structure, comprising a carcass (1), characterized in that: A bead (2) is provided on the outer side of the carcass (1), a side of the carcass (1) away from the bead (2) is provided with a sidewall (3), a tread (4) is provided on one side of the sidewall (3), a belt layer (5) is provided at the lower end of the tread (4), and a reinforcement layer (6) is provided between the carcass (1) and the sidewall (3).

2. The semi-steel radial RV tire with high load capacity and high bead durability structure according to claim 1, characterized in that: The carcass (1) is provided with three layers of high-strength breaking force polyester fiber cord layers, the high-strength breaking force polyester fiber cord layers are of a 2-high 1-low structure, the first cord layer is arranged at the outermost side of the carcass (1), the overlap amount between the inner circumference side carcass folded back portion of the first cord layer and the inner circumference maximum breaking width point is w1, w1 is 20mm-30mm, the overlap amount between the inner circumference side carcass folded back portion of the second cord layer and the inner circumference maximum breaking width point is w2, w2 is 5mm-10mm, and the overlap amount between the inner circumference side carcass folded back portion of the third cord layer and the inner circumference maximum breaking width point is w3, w3 is 15mm-25mm.

3. The semi-steel radial RV tire with high load capacity and high bead durability structure according to claim 1, characterized in that: The sidewall (3) comprises an apex rubber (31), a steel wire (32), a sidewall rubber (33) and a wear-resistant rubber (34); the apex rubber (31) is arranged at the end of the carcass (1); the steel wire (32) is inserted inside the apex rubber (31); the sidewall rubber (33) is arranged on the outside of the apex rubber (31); and the wear-resistant rubber (34) is arranged at the lower end of the sidewall rubber (33).

4. The semi-steel radial RV tire with high load capacity and high bead durability structure according to claim 1, characterized in that: A first composite rubber reinforcement (35) is provided at the upper end of the sidewall (3), the first composite rubber reinforcement (35) is arranged between the belt layer (5) and the carcass (1), the width of the first composite rubber reinforcement (35) is c, c is 15-20 mm, the thickness of the first composite rubber reinforcement (35) is d, d is 2-6 mm, a second composite rubber reinforcement (36) is provided at the lower end of the sidewall (3), the second composite rubber reinforcement (36) is arranged between the reinforcing layer (6) and the wear-resistant rubber (34), the width of the second composite rubber reinforcement (36) is a, a≥1 / 3 SH 1 mm, the distance between the center point of the second composite rubber reinforcement (36) and the rim protection point is b, b is 15±3 mm.

5. The semi-steel radial RV tire with high load capacity and high bead durability structure according to claim 1, characterized in that: The belt layer (5) is a double-layer outer "eight" structure, the outer "eight" angle is α, α is 19°~22°, the thickness of the belt layer (5) is 1.50~1.80 mm, the diameter of the belt layer (5) is 1.50~1.85 mm, and reinforcements (37) are arranged between the belt layers (5), and the reinforcements (37) are evenly arranged on the surface of the belt layer (5) located below at an angle α.

6. The semi-steel radial RV tire with high load capacity and high bead durability structure according to claim 1, characterized in that: The reinforcing layer (6) is a double-layer reinforcing layer structure, the length of the interlaced difference between the end points of the two reinforcing layers (6) is l, l is 15-20 mm, and the length of any one of the reinforcing layers (6) is G, G≥1 / 2 SH 1.

7. The semi-steel radial RV tire with high load capacity and high bead durability structure according to claim 3, characterized in that: The chafer (31) has a double-chafer structure. The chafer (31) includes an upper chafer composite rubber reinforcement (311) and a lower chafer composite rubber reinforcement (312). The radial distance of the upper chafer composite rubber reinforcement (311) is e, and 15% < e / SH 1 < 25%. The radial distance of the lower chafer composite rubber reinforcement (312) is f, and 40% < f / SH 1 < 55%.

8. The semi-steel radial RV tire with high load capacity and high bead durability structure according to claim 3, characterized in that: The diameter of the steel wire (32) is n, where n is 1.55 to 1.85 mm. A nylon wrapper is provided on the outer side of the steel wire (32), and the thickness of the nylon wrapper is m, where m ≥ 0.8 mm.

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