Reinforced light truck tire bead structure

Abstract

The utility model relates to the technical field of tire design, and particularly discloses a reinforced tire bead structure of a light truck tire, which is used for solving the problem of poor performance of a tire structure in the prior art. Comprising a lining, a carcass ply is attached to the outer side of the lining, hard bead filler corresponding to a steel wire ring is arranged on the outer side of the carcass ply, soft bead filler extending upwards is arranged on the outer side of the hard bead filler, the bottom of the carcass ply bypasses the steel wire ring and extends upwards to form a wrapping structure, and the outer end of the carcass ply is a carcass ply end point. According to the utility model, the structural form and material distribution of the tire bead part are innovatively designed, so that the durability of the tire bead part is improved; compared with the prior art, by applying the novel seam allowance reinforcing steel wire structure and the special rubber, changing the difference level between the tire body and the seam allowance reinforcing steel wires, isolating the end points of all steel wire components and the like, the deformation resistance of the tire bead position is improved, the damage to the tire bead caused by the stress concentration of the tire body turn-up end points is eliminated, and the overall durability of the tire bead position is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tire design, in particular to a reinforced tire bead structure for light trucks. Background Art

[0002] Tires are circular, ground-engaging, rolling, elastic rubber products installed on various vehicles and machinery. Typically mounted on metal rims, they support the vehicle body, cushion external impacts, maintain contact with the road, and ensure vehicle performance. However, under conditions such as high air pressure and long-term continuous use, existing tire bead structures can experience significant bending and deformation. The turned-up carcass cord and bead wire wrap near the rim flange can compress and deform, leading to stress concentration and potentially causing tire quality issues such as bead voids and cracks.

[0003] Existing tire bead structure such as Figure 1 , including an inner liner 1, an inner hard apex rubber core 3, an outer soft apex rubber core 9, a carcass cord 2, a spur wire reinforcement 4, a spur rubber 6, a sidewall rubber 8, an isolation pad rubber 7, and a wire ring 5.

[0004] The technical problem to be solved by the present invention is to provide a full-steel radial tire bead structure that resists deformation, eliminates stress concentration and improves durability through innovative design of the tire bead structure and material distribution, thereby meeting the requirements of the ultra-long service life market. Utility Model Content

[0005] The purpose of the utility model is to provide a reinforced tire bead structure for a light truck, which solves the problem of poor tire structure performance in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A reinforced tire bead structure for a light truck tire includes an inner liner, a carcass cord adhered to the outer side of the inner liner, a hard apex corresponding to a wire ring provided on the outer side of the carcass cord, a soft apex extending upward provided on the outer side of the hard apex, the bottom of the carcass cord wraps around the wire ring and extends upward to form a wrapping structure, the outer end of the carcass cord is a carcass cord endpoint, a spur-reinforcing nylon is provided at the outer side of the inner end of the carcass cord, a spur-reinforcing steel wire is provided on the outer side of the carcass cord where the carcass cord endpoint is located, the upper end of the spur-reinforcing steel wire is the outer spur-reinforcing steel wire endpoint, and the lower end of the spur-reinforcing steel wire is the inner spur-reinforcing steel wire endpoint.

[0008] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In one optional solution: wear-resistant rubber is provided on the outer side of the outer end of the reinforcing steel wire at the spigot;

[0010] A special rubber is provided between the reinforcing steel wire of the sub-mouth and the soft apex rubber;

[0011] Three types of special rubber are provided between the soft apex rubber and the end point of the carcass cord.

[0012] In an optional solution: a type 2 special rubber is provided between the type 3 special rubber and the wear-resistant rubber, and the type 2 special rubber is located outside the outer end point of the sub-mouth reinforcing steel wire.

[0013] In one optional solution: the end point of the carcass cord is clamped by type 1 special rubber and type 3 special rubber, the outer end point of the spigot reinforcement wire is clamped by type 2 special rubber and type 3 special rubber, the inner end point of the spigot reinforcement wire is located at a vertical position on the outer edge of the wire ring, and the outer end point of the spigot reinforcement wire is higher than the end point of the carcass cord.

[0014] In one optional solution, the type 1 special rubber, the type 2 special rubber, and the type 3 special rubber are made of rubber materials with high modulus and strong resistance to permanent deformation.

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

[0016] This new design improves tire bead durability through innovative design of the tire bead structure and material distribution. Compared with existing technologies, by using a new bead reinforcement wire structure and special rubber, changing the difference between the tire body and the bead reinforcement wire, and isolating the endpoints of each wire component, it improves the tire bead's deformation resistance, eliminates damage to the tire bead caused by stress concentration at the tire body turnup endpoint, and improves the overall durability of the bead area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the prior art of the utility model.

[0018] Figure 2 This is a schematic structural diagram of the utility model.

[0019] Notes on the accompanying figures: Inner liner 1, carcass cord 2, hard apex rubber 3, wire ring 4, bead reinforcing steel wire 5, wear-resistant rubber 6, type 1 special rubber 7, type 2 special rubber 8, type 3 special rubber 9, soft apex rubber 10, sidewall rubber 11, inner end point of bead reinforcing steel wire 12, outer end point of bead reinforcing steel wire 13, carcass cord end point 14, bead reinforcing nylon 15. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1

[0022] like Figure 2 As shown, the embodiment of the present invention provides a reinforced tire bead structure for a light truck, including an inner liner 1, a carcass ply 2 is attached to the outer side of the inner liner 1, a hard apex 3 corresponding to the wire bead 4 is provided on the outer side of the carcass ply 2, a soft apex 10 extending upward is provided on the outer side of the hard apex 3, the bottom of the carcass ply 2 passes over the wire bead 4 and extends upward to form a wrapping structure, the outer end of the carcass ply 2 is a carcass ply end point 14, a spur reinforcing nylon 15 is provided at the outer side of the inner end of the carcass ply 2, a spur reinforcing steel wire 5 is provided on the outer side of the carcass ply 2 where the carcass ply end point 14 is located, the upper end of the spur reinforcing steel wire 5 is the spur reinforcing steel wire outer end point 13, the lower end of the spur reinforcing steel wire 5 is the spur reinforcing steel wire inner end point 12, and a sidewall rubber 11 is provided on the upper outer surface of the inner liner 1;

[0023] The outer side of the outer end point 13 of the reinforcing steel wire of the sub-mouth is provided with a wear-resistant rubber 6;

[0024] A special rubber 7 is provided between the sub-mouth reinforcement wire 5 and the soft apex 10;

[0025] A three-type special rubber 9 is provided between the soft apex 10 and the carcass cord end point 14;

[0026] A second type of special rubber 8 is provided between the third type of special rubber 9 and the wear-resistant rubber 6. The second type of special rubber 8 is located outside the outer end point 13 of the reinforcing steel wire at the sub-mouth;

[0027] The carcass cord end point 14 is clamped by the type 1 special rubber 7 and the type 3 special rubber 9, the outer end point 13 of the spigot reinforcement wire is clamped by the type 2 special rubber 8 and the type 3 special rubber 9, the inner end point 12 of the spigot reinforcement wire is located at a vertical position on the outer edge of the wire ring 4, and the outer end point 13 of the spigot reinforcement wire is higher than the carcass cord end point 14;

[0028] Type 1 special rubber 7, Type 2 special rubber 8, and Type 3 special rubber 9 use rubber materials with high modulus and strong resistance to permanent deformation:

[0029] The rubber compounds with high modulus and strong resistance to permanent deformation mainly include the following:

[0030] Natural rubber (NR): Natural rubber has a high modulus, excellent resilience, tensile strength, and elongation, and excellent abrasion and tear resistance. However, natural rubber has poor oil resistance and is susceptible to aging.

[0031] Styrene butadiene rubber (SBR): Styrene butadiene rubber is the most widely produced general-purpose synthetic rubber. It has better wear resistance and aging resistance than natural rubber, but has lower elasticity and poorer tear resistance.

[0032] Butadiene rubber (BR): Butadiene rubber has excellent elasticity and wear resistance, good low temperature resistance, but it generates less heat under dynamic load and has poor tear resistance;

[0033] The outer endpoint 13 of the upper bead reinforcing steel wire is higher than the carcass cord endpoint 14, and the inner endpoint 12 of the bead reinforcing steel wire is located at a vertical position on the outer edge of the bead ring 4, forming a special bead wire reinforcement method; the bead reinforcing steel wire 5 protects the carcass cord endpoint 14, and the height of the carcass cord endpoint 14 is reduced, so the stress of the bead is dispersed to the entire bead reinforcing steel wire 5. At the same time, the bead reinforcing nylon 15 is used on the inner side of the bead ring to improve the inner side rigidity of the bead, thereby improving the overall load-bearing performance of the bead;

[0034] The carcass cord end point 14 and the outer end point 13 of the reinforcing steel wire at the spigot are separated by a rubber material with a high modulus and strong resistance to permanent deformation, which reduces the end point shear stress between the carcass cord end point 14 and the outer end point 13 of the reinforcing steel wire at the spigot under overload conditions and reduces the heat generated by the end point shear stress between the steel wire components;

[0035] The new tire bead structure adopts a brand-new bead reinforcement ring structure design. The steel wire reinforcement layer is located on the outside of the steel wire ring, and the nylon reinforcement layer is located on the inside of the steel wire ring. The soft apex rubber end point, the nylon reinforcement layer end point, the wear-resistant rubber end point, the steel wire reinforcement layer end point, the tire body end point, and the hard apex rubber end point are all distributed on different horizontal planes. The component end points are distributed in a gradient manner, so that the stress on the ring part is evenly dispersed to the entire tire bead component, avoiding stress concentration at the end points of each component. At the same time, the end points of the steel wire components are isolated with special rubber, which reduces the interlayer shear force of the steel wire components, thereby reducing shear heat generation. According to the description of the utility model provided herein, variations of the utility model are possible. Although certain typical embodiments and details have been shown for the purpose of illustrating the subject utility model, it is obvious to those skilled in the art that various changes and modifications may be made without departing from the scope of the subject utility model. For example, the nylon reinforcement layer may be a single layer, a double layer, or other types; the steel wire reinforcement layer may be made of nylon material, steel wire material, or other materials; the special rubber may wrap around the end points of the steel wire component, may be laid flat on the component, or may be draped over the edge of the steel wire component, and the overlap amount may be adjustable.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reinforced light truck tire bead structure, characterized by: The invention comprises an inner liner (1), wherein a carcass cord (2) is attached to the outer side of the inner liner (1), a hard apex rubber (3) corresponding to the wire ring (4) is provided on the outer side of the carcass cord (2), a soft apex rubber (10) extending upward is provided on the outer side of the hard apex rubber (3), the bottom of the carcass cord (2) passes over the wire ring (4) and extends upward to form a wrapping structure, the outer end of the carcass cord (2) is a carcass cord end point (14), a spur reinforcing nylon (15) is provided at the outer side of the inner end of the carcass cord (2), a spur reinforcing steel wire (5) is provided on the outer side of the carcass cord (2) where the carcass cord end point (14) is located, the upper end of the spur reinforcing steel wire (5) is the spur reinforcing steel wire outer end point (13), the lower end of the spur reinforcing steel wire (5) is the spur reinforcing steel wire inner end point (12), and the upper outer surface of the inner liner (1) is provided with a sidewall rubber (11).

2. The reinforced light truck tire bead structure according to claim 1, characterized in that: The outer side of the outer end point (13) of the reinforcing steel wire of the sub-mouth is provided with a wear-resistant rubber (6); A type of rubber (7) is provided between the sub-mouth reinforcement steel wire (5) and the soft triangle rubber (10); A three-type rubber (9) is provided between the soft apex rubber (10) and the end point (14) of the carcass cord.

3. The reinforced light truck tire bead structure according to claim 1, characterized in that: A second type of rubber (8) is provided between the third type of rubber (9) and the wear-resistant rubber (6), and the second type of rubber (8) is located outside the outer end point (13) of the sub-mouth reinforcing steel wire.

4. The reinforced light truck tire bead structure according to claim 1, characterized in that: The end point (14) of the carcass cord is clamped by the type 1 rubber (7) and the type 3 rubber (9), the outer end point (13) of the sprocket reinforcing wire is clamped by the type 2 rubber (8) and the type 3 rubber (9), the inner end point (12) of the sprocket reinforcing wire is located at a vertical position on the outer edge of the wire ring (4), and the outer end point (13) of the sprocket reinforcing wire is higher than the end point (14) of the carcass cord.

5. The reinforced light truck tire bead structure according to claim 1, characterized in that: The type 1 rubber (7), type 2 rubber (8) and type 3 rubber (9) are made of rubber materials with high modulus and strong resistance to permanent deformation.

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