A tire triangle rubber design method and tire triangle rubber structure

Abstract

This application relates to the technical field of automobile tires, and more particularly to a tire triangular rubber design method and structure. The first geometric parameter is the ratio of the straight-line distance from the upper end to the lower end of the vertical cross-section of the triangular rubber to the vertical height from the widest point of the tire cross-section to the heel. The second geometric parameter is the ratio of the sum of the maximum widths at various points after dividing the vertical cross-section of the triangular rubber into several equal parts along the vertical direction to the length of the vertical cross-section. A finite element model is constructed based on this to analyze and obtain durability data. The first and second geometric parameters are then optimized based on the durability data. By using the vertical cross-section of the triangular rubber to parametrically describe its shape and performing finite element analysis, the width and height parameters of the triangular rubber are optimized. This solves the technical problem of the lack of standard triangular rubber structure shape parameters in existing technologies, which makes it difficult to provide an efficient and accurate reference in actual design, thus providing a design reference for tire durability performance.

Description

Technical Field

[0001] This application relates to the field of automotive tire technology, and in particular to a tire triangle rubber design method and tire triangle rubber structure. Background Technology

[0002] Improving tire durability has always been a key challenge in tire research. The real-world environment and road conditions in which tires are used are complex. Prolonged exposure to outdoor elements, including road abrasion and weathering, leads to tire aging and various defects, directly impacting tire lifespan. Several technologies exist to improve tire durability, such as using a three-layer belt structure with two layers of zero-degree winding, or altering the belt ply gradient. Most methods improve tire durability by modifying the tire crown structure.

[0003] In fact, the structure and size of the tire bead also affect tire durability. Located in the tire bead area, the bead primarily bears the tire's weight and cushions impacts to the bead. Current tire bead design methods mainly involve finite element modeling and analysis based on the tire model to be designed, and then optimizing the bead structure based on the strain data obtained from the finite element analysis.

[0004] However, existing tire triangular rubber structure design methods lack standard triangular rubber structure shape parameters, and the relationship between triangular rubber shape parameters and triangular rubber structure strain parameters is vaguely described, making it difficult to provide an efficient and accurate reference in actual design. Summary of the Invention

[0005] The purpose of this application is to provide a tire triangle rubber design method and tire triangle rubber structure. The existing tire triangle rubber structure design methods lack standard triangle rubber structure shape parameters, and the relationship between triangle rubber shape parameters and triangle rubber structure strain parameters is vaguely described, making it difficult to provide an efficient and accurate reference effect in actual design.

[0006] In a first aspect, this application provides a tire triangular rubber design method, wherein the tire triangular rubber design method uses a first geometric parameter and a second geometric parameter of the vertical cross section of the triangular rubber to describe the triangular rubber structure.

[0007] The first geometric parameter is the ratio of the straight-line distance from the upper end point to the lower end point of the vertical cross-section of the triangular rubber to the vertical height from the widest point of the tire cross-section to the heel.

[0008] The second geometric parameter is the ratio of the sum of the maximum widths at various points after the vertical section of the triangular adhesive is divided into several equal parts along the vertical direction to the length of the vertical section of the triangular adhesive.

[0009] The tire triangular rubber design method includes the following steps:

[0010] Step 1: For the tire model to be designed, obtain the material distribution diagram of any single-core tire structure, and confirm the vertical height from the widest part of the tire section to the heel, the first geometric parameter, and the second geometric parameter.

[0011] Step 2: Construct a finite element model for the single-core tire structure and analyze it to obtain the durability data of any single-core tire structure.

[0012] Step 3: Optimize the first geometric parameters and the second geometric parameters based on the durability data.

[0013] Furthermore, the second geometric parameter is the ratio of the sum of the maximum widths at each point after the vertical cross-section of the triangular adhesive is divided into four equal parts along the vertical direction to the length of the vertical cross-section of the triangular adhesive.

[0014] Furthermore, the durability data includes the rectangularity coefficient of the tire contact patch, the average tire contact pressure, the tire bead temperature, the maximum stress of the tire carcass wires, and the maximum stress of the tire steel-clad wires.

[0015] Furthermore, the durability data also includes tire durability time.

[0016] Secondly, the present invention also provides a tire triangular rubber structure, designed using the above-mentioned tire triangular rubber design method, wherein the range of the first geometric parameter is 0.8-1; and the range of the second geometric parameter is 0.3-0.5.

[0017] Compared with the prior art, the tire triangular rubber design method provided in this application uses a first geometric parameter and a second geometric parameter of the vertical cross-section of the triangular rubber to describe the triangular rubber structure. The first geometric parameter is the ratio of the straight-line distance from the upper end point to the lower end point of the vertical cross-section of the triangular rubber to the vertical height from the widest point of the tire cross-section to the heel. The second geometric parameter is the ratio of the sum of the maximum widths of the vertical cross-section of the triangular rubber after being divided into several equal parts along the vertical direction to the length of the vertical cross-section of the triangular rubber. The tire triangular rubber design method includes the following steps: for the tire model to be designed, obtain the material distribution diagram of any single-core tire structure, confirm the vertical height from the widest point of the tire cross-section to the heel, the first geometric parameter, and the second geometric parameter. The first and second geometric parameters are determined; a finite element model is constructed and analyzed for single-core tire structures to obtain durability data for any single-core tire structure; the first and second geometric parameters are optimized based on the durability data; the shape of the triangular rubber is described by using a vertical cross-section of the triangular rubber, and the width and height parameters of the triangular rubber are optimized based on the finite element analysis results. This solves the technical problem that the existing technology lacks standard triangular rubber structure shape parameters, and the relationship between the triangular rubber shape parameters and the triangular rubber structure strain parameters is vaguely described, making it difficult to provide an efficient and accurate reference in actual design. The triangular rubber structure design method is optimized, providing a design reference for tire durability performance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a structural cross-sectional view of the tire provided in the embodiments of this application;

[0020] Figure 2 This is a cross-sectional view of the tire triangular rubber structure provided in the embodiments of this application.

[0021] Figure label:

[0022] 100. Triangle rubber;

[0023] 200. Tire cross-section;

[0024] 300. Fetal heel. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] like Figure 1 and Figure 2 As shown, this application embodiment provides a design method for a triangular rubber 100, which uses a first geometric parameter and a second geometric parameter of the vertical cross-section of the triangular rubber to describe the triangular rubber structure. The first geometric parameter is the ratio of the straight-line distance from the upper end point to the lower end point of the vertical cross-section of the triangular rubber to the vertical height from the widest point of the tire section 200 to the heel 300. The second geometric parameter is the ratio of the sum of the maximum widths of the vertical cross-section of the triangular rubber after it is divided into several equal parts along the vertical direction to the length of the vertical cross-section of the triangular rubber. The design method for the tire triangular rubber includes the following steps: Step 1: For the tire model to be designed, obtain the material distribution diagram of any single-core tire structure, and confirm the vertical height from the widest point of the tire section 200 to the heel 300, the first geometric parameter, and the second geometric parameter; Step 2: Analyze the single-core tire structure by constructing a finite element model, and obtain the durability data of any single-core tire structure; Step 3: Optimize the first geometric parameter and the second geometric parameter based on the durability data.

[0033] The triangular rubber structure design method provided by this invention describes the shape of the triangular rubber 100 by using the vertical cross-section of the triangular rubber and optimizes the width and height parameters of the triangular rubber 100 based on the finite element analysis results. This solves the technical problem in the prior art that there is a lack of standard triangular rubber structure shape parameters and the relationship between the shape parameters of the triangular rubber 100 and the strain parameters of the triangular rubber structure is vague and difficult to provide an efficient and accurate reference in actual design. This method optimizes the triangular rubber structure design method and provides a design reference for the durability performance of tires.

[0034] Specifically, increasing the height of the triangular rubber 100 increases the buffer area against external impacts to the bead, improves the rigidity of the bead area, and disperses the heat accumulated in the bead due to tire hysteresis, thus improving tire durability and handling stability. Increasing the thickness of the triangular rubber 100 reduces the shear force generated by various components in the bead, preventing bead cracking and effectively buffering external impacts. From the perspective of stress-relieving stepped structure design, it reduces the stress on the tire carcass and steel sheath to a certain extent, alleviating steel wire deformation. In this embodiment, the vertical height H from the widest point of the tire section 200 to the heel 300 is the lower sidewall height. Different tire specifications have national standard ranges for their outer contour designs (driving width, section width, tire outer diameter, rim size; tire height is determined based on outer diameter and rim height), while the upper and lower sidewall heights need to be designed according to the tire type and actual production requirements. Therefore, after confirming the tire model to be designed, a material distribution diagram of any single-core tire structure is obtained, and the vertical height from the widest point of the tire section 200 to the heel 300 is confirmed. In this embodiment, the vertical height from the widest point of the section to the heel 300 is H, the straight line from the upper end to the lower end of the triangular rubber 100 is h1, the vertical straight line from the upper end of the triangular rubber 100 to the horizontal axis passing through the lower end is h2, and the angle between h1 and the horizontal axis passing through the lower end is β. The three line segments that pass through the intersection of the three horizontal lines that equally divide h2 and h1 and are perpendicular to h1 are a, b, and c, respectively. The sum of the lengths of the three line segments a, b, and c is the sum of the maximum widths of the vertical section of the triangular rubber after being divided into several equal parts along the vertical direction in the second geometric parameter. Thus, the first geometric parameter ω1 is h2 / H, and the second geometric parameter ω2 is (a+b+c) / h1. After confirming the aforementioned combination parameters, a finite element model can be constructed to analyze the single-core tire structure and obtain durability data for any single-core tire structure. Specifically, the finite element analysis can be set up to perform inflation loading and rolling analysis on the single-core tire structure to obtain tire durability data. By continuously modifying the first and second geometric parameters and repeating the analysis test, multiple sets of tire durability data under different first and second geometric parameters can be obtained. Then, through mathematical methods such as regression analysis, the optimal range of the first and second geometric parameters can be obtained.

[0035] Preferably, the second geometric parameter is the ratio of the sum of the maximum widths at each point after the vertical section of the triangular adhesive is divided into four equal parts along the vertical direction to the length of the vertical section of the triangular adhesive 100.

[0036] Specifically, in this embodiment, three line segments are set from bottom to top, passing through the intersection points of three horizontal lines that equally divide h2 and h1, and perpendicular to h1. The sum of these three line segments is the sum of the maximum widths at each point after the vertical cross-section of the triangular adhesive is divided into four equal parts along the vertical direction, with the second geometric parameter being... This ensures the accuracy of the 100mm width data description for the triangular adhesive while avoiding excessive calculations that could affect design efficiency.

[0037] Furthermore, durability data include the rectangularity factor of the tire contact patch, the average tire contact pressure, the tire bead temperature, the maximum stress of the carcass wires, and the maximum stress of the tire steel-clad wires.

[0038] Specifically, by recording the rectangular coefficient of the tire contact patch, the average ground pressure, the tire bead temperature, the maximum stress of the carcass wires, and the maximum stress of the steel-clad wires, the durability of the tire can be effectively observed. A slight increase in the rectangular coefficient of the contact patch, a slight increase in the average ground pressure, a decrease in the bead temperature, and a decrease in the maximum stress of both the carcass wires and the steel-clad wires indicate that the tire has better durability.

[0039] Furthermore, durability data also includes tire durability time, which allows for a precise understanding of a tire's lifespan.

[0040] Secondly, the present invention also provides a tire triangular rubber structure, designed using the above-mentioned tire triangular rubber design method, wherein the range of the first geometric parameter is 0.8-1; and the range of the second geometric parameter is 0.3-0.5.

[0041] Specifically, in this embodiment, a=19.78mm, b=14.32mm, c=3.23mm, H=119mm, h2=109mm, ω1=0.92, and ω2=0.34. When the first geometric parameter is in the range of 0.8-1 and the second geometric parameter is in the range of 0.3-0.5, the imprint rectangle coefficient is slightly larger, the average ground contact pressure is slightly larger, the bead temperature is reduced, the maximum stress of the carcass steel wire and the steel-clad steel wire is reduced, and the tire durability time is longer, effectively improving the tire durability performance.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for designing a tire triangle rubber lining, characterized in that, The tire triangular rubber design method uses the first and second geometric parameters of the vertical cross section of the triangular rubber to describe the triangular rubber structure. The first geometric parameter is the ratio of the straight-line distance from the upper end point to the lower end point of the vertical section of the triangular rubber to the vertical height from the widest point of the tire section (200) to the heel (300); The second geometric parameter is the ratio of the sum of the maximum widths at various points after the vertical section of the triangular adhesive is divided into several equal parts along the vertical direction to the length of the vertical section of the triangular adhesive; The tire triangular rubber design method includes the following steps: Step 1: For the tire model to be designed, obtain the material distribution diagram of any single-core tire structure, and confirm the vertical height from the widest point of the tire section (200) to the heel (300), the first geometric parameter, and the second geometric parameter; Step 2: Construct a finite element model for the single-core tire structure and analyze it to obtain the durability data of any single-core tire structure. Step 3: Optimize the first geometric parameters and the second geometric parameters based on the durability data.

2. The tire triangle rubber design method according to claim 1, characterized in that, The second geometric parameter is the ratio of the sum of the maximum widths at each point after the vertical section of the triangular adhesive is divided into four equal parts along the vertical direction to the length of the vertical section of the triangular adhesive.

3. The tire triangle rubber design method according to claim 1, characterized in that, The durability data includes the rectangularity coefficient of the tire contact patch, the average tire contact pressure, the tire bead temperature, the maximum stress of the tire carcass wires, and the maximum stress of the tire steel-clad wires.

4. The tire triangle rubber design method according to claim 1, characterized in that, The durability data also includes tire durability time.

5. A tire triangular rubber structure, designed using the tire triangular rubber design method as described in any one of claims 1-4, characterized in that, The first geometric parameter has a range of 0.8-1; the second geometric parameter has a range of 0.3-0.5.

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