Reinforced light truck tire bead structure

Abstract

The invention relates to the technical field of tire design, and particularly discloses a reinforced light truck tire bead structure 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. Through innovative design of the structural form and material distribution of the tire ring part, the durability of the tire ring 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 invention relates to the technical field of tire design, in particular to a reinforced tire bead structure for a light truck. Background Art

[0002] Tires are circular elastic rubber products that roll on the ground and are installed on various vehicles or machines. They are usually installed on metal rims to support the vehicle body, buffer external impacts, achieve contact with the road surface and ensure the vehicle's driving performance. Under conditions such as high air pressure and long-term continuous use, the existing tire bead structure is greatly bent and deformed, and the turned-up carcass cord and bead wire cloth near the rim flange area are compressed and deformed, which easily forms stress concentration, resulting in tire quality problems such as tire ring emptying and ring cracking.

[0003] Existing tire bead structure such as Figure 1 , including an inner liner 1, an inner hard triangle rubber core 3, an outer soft triangle rubber core 9, a carcass cord 2, a sprocket steel wire reinforcement 4, a sprocket 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 an all-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. Summary of the invention

[0005] The purpose of the present invention 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 object, the present invention provides the following technical solutions:

[0007] A reinforced tire bead structure for a light truck tire comprises an inner liner, a carcass cord is attached to the outer side of the inner liner, a hard apex corresponding to a wire ring is arranged on the outer side of the carcass cord, a soft apex extending upward is arranged on the outer side of the hard apex, the bottom of the carcass cord goes around the wire ring and extends upward to form a wrapping structure, the outer end of the carcass cord is an end point of the carcass cord, a spigot-reinforcing nylon is arranged on the outer side of the inner end of the carcass cord, a spigot-reinforcing steel wire is arranged on the outer side of the carcass cord where the end point of the carcass cord is located, the upper end of the spigot-reinforcing steel wire is the outer end point of the spigot-reinforcing steel wire, and the lower end of the spigot-reinforcing steel wire is the inner end point of the spigot-reinforcing steel wire.

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

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

[0010] A special type of rubber is provided between the reinforcing steel wire of the sub-mouth and the soft triangle 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 an optional scheme: 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 an 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 present invention has the following beneficial effects:

[0016] The present invention improves the durability of the tire bead by innovatively designing the tire bead structure and material distribution. Compared with the prior art, the present invention improves the anti-deformation performance of the tire bead by applying a new bead reinforcement wire structure and special rubber, changing the difference between the carcass and the bead reinforcement wire, isolating the end points of each wire component, etc., eliminating the damage to the tire bead caused by the stress concentration of the carcass turn-up end point, and improving the overall durability of the bead area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the prior art of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of the present invention.

[0019] Notes on the accompanying drawings: 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 described embodiments 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, comprising an inner liner 1, a carcass cord 2 is attached to the outer side of the inner liner 1, a hard apex 3 corresponding to a wire bead 4 is arranged on the outer side of the carcass cord 2, a soft apex 10 extending upward is arranged on the outer side of the hard apex 3, the bottom of the carcass cord 2 bypasses the wire bead 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 arranged at the outer side of the inner end of the carcass cord 2, a spur reinforcing steel wire 5 is arranged 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 a spur reinforcing steel wire outer end point 13, the lower end of the spur reinforcing steel wire 5 is a spur reinforcing steel wire inner end point 12, and a sidewall rubber 11 is arranged 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 rubber 10;

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

[0026] A second type of special rubber 8 is provided between the third type of special rubber 9 and the wear-resistant rubber 6, and 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 end point 14 of the carcass cord is clamped by the type 1 special rubber 7 and the type 3 special rubber 9, the outer end point 13 of the reinforcing steel wire is clamped by the type 2 special rubber 8 and the type 3 special rubber 9, the inner end point 12 of the reinforcing steel wire is located at a vertical position of the outer edge of the wire ring 4, and the outer end point 13 of the reinforcing steel wire is higher than the end point 14 of the carcass cord;

[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 prone to aging12.

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

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

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

[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 stress shear between the steel wire components;

[0035] The novel 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, 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, and 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 by special rubber, which reduces the interlayer shear force of the steel wire components, thereby reducing shear heat generation; according to the description of the invention provided herein, variations of the invention are possible. Although certain typical embodiments and details have been shown to illustrate the subject invention patent, it is obvious to those skilled in the art that various changes and modifications can be made without departing from the scope of the subject invention. For example, the nylon reinforcement layer can be a single layer, a double layer or other types; the steel wire reinforcement layer can be a nylon material, a steel wire material, or other materials; the special rubber can wrap the end points of the steel wire component, can be laid flat on the component, or can be lapped on the edge of the steel wire component, and the overlap amount can be adjusted.

[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 substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A reinforced tire bead structure for a light truck, characterized in that: The invention comprises an inner liner (1), wherein a carcass cord (2) is laminated on the outer side of the inner liner (1), a hard apex rubber (3) corresponding to a wire ring (4) is arranged on the outer side of the carcass cord (2), a soft apex rubber (10) extending upward is arranged on the outer side of the hard apex rubber (3), the bottom of the carcass cord (2) bypasses 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 arranged on the outer side of the inner end of the carcass cord (2), a spur reinforcing steel wire (5) is arranged 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 a spur reinforcing steel wire outer end point (13), the lower end of the spur reinforcing steel wire (5) is a 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 at the sub-mouth is provided with wear-resistant rubber (6); A special rubber (7) is provided between the sub-mouth reinforcement steel wire (5) and the soft triangle rubber (10); A three-type special rubber (9) is provided between the soft apex rubber (10) and the end point (14) of the carcass cord fabric.

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

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 first type special rubber (7) and the third type special rubber (9), the outer end point (13) of the spigot reinforcing steel wire is clamped by the second type special rubber (8) and the third type special rubber (9), the inner end point (12) of the spigot reinforcing steel wire is located at a vertical position of the outer edge of the wire ring (4), and the outer end point (13) of the spigot reinforcing steel 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 special rubber (7), the type 2 special rubber (8), and the type 3 special rubber (9) are made of rubber materials with high modulus and strong resistance to permanent deformation.

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