Truck radial tubeless tire
By combining the L-shaped wire reinforcement layer and the carcass ply in the tire, the cracks and air leakage problems caused by unreasonable wrapping methods in the traditional tire structure are solved, and higher load bearing and durability are achieved, while reducing costs.
Patent Information
- Application Number
- CN202422137663.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In traditional tire structures, the wrapping method of the carcass ply and wire reinforcement layer is not reasonable enough, resulting in cracks that are prone to occur during long-term and large load loads, which leads to air leakage or bloating and tire bursting.
The inner and outer layers of the steel wire reinforcement layer wrapped in L-shaped and carcass ply include the method. The steel wire reinforcement layer consists of multiple wire cords with a density of 4.0-6.0 pieces/cm. The single breaking force is between 1100N-1800N, the diameter is between 0.95-1.34mm, and the cutting construction angle is between 15-21 degrees.
It effectively controls the extension and deformation of the bead, reduces the occurrence of cracks in the bead part, improves the load-bearing and durability of the tire, and saves materials and reduces costs.
Smart Images
Figure CN222946471U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tires, and in particular relates to a load-bearing radial tubeless tire. Background Art
[0002] Tires are used on cars to directly contact the ground and achieve car movement by generating friction power through friction between the tires and the ground.
[0003] Tires are mostly made of rubber. Specifically, rubber tires can not only form a buffer during vehicle driving, but also have a higher grip on the ground, making it less likely to slip on the ground during high-speed rotation.
[0004] Since the tire bears the weight of the entire vehicle body, the requirements for the tire structure performance strength are relatively high. Therefore, most tires disclosed in the prior art are composite layer structures to meet their performance requirements.
[0005] Specifically, the tire of the prior art mainly includes a tire bead, a tire bead wire for increasing the rigidity of the tire structure, and a tire carcass cord for increasing the tearing and breaking resistance of the tire.
[0006] However, there is a fatal flaw in the traditional tire structure, which is reflected in the unreasonable way of wrapping the carcass cord and the steel wire reinforcement layer in the existing technology. The steel wire reinforcement layer is wrapped from the inside to the outside along the carcass cord layer at the bead part. After wrapping, due to the existence of the inner end point of the steel wire reinforcement layer, when the tire is loaded for a long time and with a large load, cracks will occur in the tire, and then the gas in the tire cavity will penetrate into the tire, eventually causing the tire to leak or bulge and burst.
[0007] The tire bead is the main stress-bearing area. The inner end point can be avoided by increasing or decreasing the height of the reinforcement layer, or some technical solutions introduce reinforcing filling materials at the inner end point of the reinforcement layer to disperse this stress concentration phenomenon. However, the cost is greatly increased, and the increase in the size of the tire bead will also cause heat dissipation problems. The above measures cannot solve the problem well. Utility Model Content
[0008] Based on the above background, the purpose of the utility model is to provide a load-bearing radial tubeless tire.
[0009] In order to achieve the above objectives, the utility model adopts the following technical solutions:
[0010] A load-carrying radial tubeless tire, comprising a tire, wherein the tire comprises beads arranged at intervals on both sides, and after the tire is installed, the beads are engaged with the rim;
[0011] A carcass ply is integrally formed between the tire beads. The carcass ply starts from the tire beads and passes through the tire sidewalls, the tire shoulders and the tire crown, and is arranged between the tire beads on both sides in a circular ring structure.
[0012] The carcass cord layer is turned up around the tire bead from the inside to the outside;
[0013] The tire also includes a steel wire reinforcement layer wrapped on the carcass cord layer from the inside to the outside;
[0014] The wrapping method of the steel wire reinforcement layer is L-shaped wrapping;
[0015] The steel wire reinforcement layer is composed of a plurality of steel cords arranged in parallel.
[0016] Preferably, the height of the turned-up end point of the steel wire reinforcement layer reaching the tire section is h1;
[0017] The lower sidewall height of the tire is H1, and h1 is 0.3-0.35 times of H1.
[0018] Preferably, the outer end point of the steel wire reinforcement layer is h2, and the height of h2 is 8-15 mm higher than h1;
[0019] The distance between the outer end point h2 of the steel wire reinforcement layer and the outer surface of the tire sidewall is 6.0-7.0 mm.
[0020] Preferably, the inner endpoint of the steel wire reinforcement layer is h3, and the inner endpoint h3 of the steel wire reinforcement layer is located between +5 mm and -5 mm of the tire bead width centerline.
[0021] Preferably, the arrangement density of the steel cords is 4.0-6.0 cords / cm.
[0022] Preferably, the breaking strength of a single steel cord is between 1100N and 1800N.
[0023] Preferably, the diameter of the steel cord is between 0.95-1.34 mm.
[0024] Preferably, the cutting angle of the steel cord is between 15 and 21 degrees.
[0025] Preferably, a layer of protective rubber is provided at the contact area between the tire bead and the rim;
[0026] The outer height of the protective rubber is 5-15 mm higher than the outer end point h2 of the carcass cord layer;
[0027] A sealant layer is coated on the inner side wall of the tire;
[0028] The inner end of the protective glue is connected to the sealant layer with a width of 8-15 mm.
[0029] Preferably, the thickness of the sealant layer is 2.5-5.0 mm.
[0030] The utility model has the following beneficial effects:
[0031] In the tire structure disclosed by the utility model, the carcass cord layer and the steel wire reinforcement layer are wrapped in an L-shaped wrapping manner, and the inner and outer layers of the carcass cord layer are included in the L-shaped wrapping manner. This not only saves the defect of excessive use of materials in traditional wrapping methods, which leads to high tire cost.
[0032] At the same time, the L-type wrapping method and the carcass cord layer wrapping method not only effectively control the tire bead extension deformation, but also reduce the defect of cracks in the bead portion of the load-bearing radial tubeless tire during use, which leads to reduced load-bearing capacity of the bead portion of the load-bearing radial tubeless tire. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0034] Figure 1 It is a schematic diagram of the overall structure in an embodiment of the utility model;
[0035] Figure 2 It is a schematic diagram of the structure of a tire in an embodiment of the utility model.
[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0038] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0039] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0040] Example 1
[0041] like Figure 1-2 As shown, a radial pneumatic tire includes a tire, and the tire includes tire beads 2 spaced apart on both sides. After the tire is installed, the tire beads 2 are attached to the rim, which is the same as the tire beads 2 of the existing tire. The tire beads 2 are composed of a wire ring and a triangular filling rubber 7.
[0042] The tire further includes a carcass ply 5A (the carcass ply 5A is a single-layer structure) and a steel wire reinforcement layer 5B (the steel wire reinforcement layer 5B and the carcass ply 5A together form a carcass 5a structure of the tire).
[0043] The carcass ply 5A is arranged in a circular ring shape between the two tire beads 2, starting from the tire bead 2, passing through the tire sidewall, the tire shoulder and the tire crown. The carcass ply 5A is turned up around the tire bead 2 from the inside to the outside, and the height of the turned-up end point of the carcass ply 5A on the tire section is h1, and the value of h1 is 0.3-0.35 of the lower sidewall height H1. Specifically, the lower sidewall height H1 is 118mm, and correspondingly, the height of h1 is set to 38-40mm.
[0044] Specifically, the carcass ply 5A is formed by carcass cords arranged in parallel at a predetermined density, and the carcass cords are arranged in a meridian direction inside the tire.
[0045] The steel wire reinforcement layer 5B is wrapped in an L-shape from the inside to the outside on the tire bead 2 part 5a along the carcass cord layer (the L-shape wrapping method not only saves the traditional wrapping method's excessive use of materials, which leads to a large cost of the tire. At the same time, the L-shape wrapping method and the carcass cord layer's wrapping method not only effectively control the tensile deformation of the tire bead 2, but also reduce the cracks in the tire bead 2 part of the load-bearing radial tubeless tire during use, which leads to the defect of reduced load-bearing capacity of the tire bead 2 part).
[0046] Specifically, the outer end point h2 of the steel wire reinforcement layer 5B is 8-15mm higher than h1, and the specific height is 50mm; the inner end point h3 of the steel wire reinforcement layer 5B is set within the range of +5-5mm (specifically, the midpoint of the center line is the reference point, one side is a positive value and the other side is a negative value) of the width center line of the tire bead 2. At the same time, the distance from the outer end height h2 of the steel wire reinforcement layer 5B to the outer surface of the tire sidewall is 6.0-7.0mm.
[0047] The steel wire reinforcement layer 5B is formed by arranging a plurality of steel cords in parallel at a predetermined density.
[0048] At the same time, the cutting angle of the steel cord is 18 degrees. The laying density of the steel cord is: the steel cord density is 4.0-6.0 strands / cm, and 6 strands / cm is used specifically.
[0049] Meanwhile, the breaking strength of a single steel cord 3 is between 1100N and 1800N; and the diameter of a single steel cord is between 0.95mm and 1.34mm.
[0050] A protective rubber is provided in the contact area between the bead 2 and the rim of the above-mentioned tire, and the outer height of the protective rubber is controlled to be 5-15mm high at h2; the inner end of the protective rubber is arranged to be in contact with the sealing rubber layer on the inner surface of the tire by 8-15mm (specifically, a 2.5-5.0 thick sealing rubber layer 6 is coated on the inner surface of the tire in the same way as the existing tire sealing method).
[0051] Example 2
[0052] like Figure 1-2 As shown, the tire of the above embodiment is mounted on 17.5", 19.5", 22.5", and 24.5" rims with a 15-degree deep groove.
[0053] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.
Claims
1. A load-carrying radial tubeless tire, characterized in that: The tire comprises tire beads spaced at two sides, and after the tire is installed, the tire beads are engaged with the wheel rim; A carcass ply is integrally formed between the tire beads. The carcass ply starts from the tire beads and passes through the tire sidewalls, the tire shoulders and the tire crown, and is arranged between the tire beads on both sides in a circular ring structure. The carcass cord layer is turned up around the tire bead from the inside to the outside; The tire also includes a steel wire reinforcement layer wrapped on the carcass cord layer from the inside to the outside; The wrapping method of the steel wire reinforcement layer is L-shaped wrapping; The steel wire reinforcement layer is composed of a plurality of steel cords arranged in parallel.
2. A load-carrying radial tubeless tire according to claim 1, characterized in that: The height of the turned-up end point of the steel wire reinforcement layer reaching the tire section is h1; The lower sidewall height of the tire is H1, and h1 is 0.3-0.35 times of H1.
3. A load-carrying radial tubeless tire according to claim 2, characterized in that: The outer end point of the steel wire reinforcement layer is h2, and the height of h2 is 8-15mm higher than h1; The distance between the outer end point h2 of the steel wire reinforcement layer and the outer surface of the tire sidewall is 6.0-7.0 mm.
4. A load-carrying radial tubeless tire according to claim 3, characterized in that: The inner endpoint of the steel wire reinforcement layer is h3, and the inner endpoint h3 of the steel wire reinforcement layer is located between +5mm and -5mm of the tire bead width center line.
5. A load-carrying radial tubeless tire according to claim 2, characterized in that: The arrangement density of the steel cord is 4.0-6.0 cords / cm.
6. A load-carrying radial tubeless tire according to claim 2, characterized in that: The breaking strength of a single steel cord is between 1100N and 1800N.
7. A load-carrying radial tubeless tire according to claim 2, characterized in that: The diameter of the steel cord is between 0.95-1.34 mm.
8. The load-carrying radial tubeless tire according to claim 2, characterized in that: The cutting construction angle of the steel cord is between 15 and 21 degrees.
9. The load-carrying radial tubeless tire according to claim 3, characterized in that: A layer of protective rubber is provided at the contact area between the tire bead and the rim; The outer height of the protective rubber is 5-15 mm higher than the outer end point h2 of the carcass cord layer; A sealant layer is coated on the inner side wall of the tire; The inner end of the protective glue is connected to the sealant layer with a width of 8-15 mm.
10. A load-carrying radial tubeless tire according to claim 9, characterized in that: The thickness of the sealant layer is 2.5-5.0 mm.