Design method of light truck tire

Abstract

The invention provides a light truck tire design method, and relates to the technical field of tire design, and the method comprises the following steps: collecting the use environment data of a light truck tire, and generating the working parameter requirements of the light truck tire; further generating contour data of the light truck tire; size data and preliminary material selection of each part structure of the light truck tire are generated; finally generating a preliminary model; performing simulation analysis on the preliminary model, and then performing adjustment to obtain a production model; selecting a tread pattern and a use air pressure range of the light truck tire based on working parameter requirements of the light truck tire; the tread patterns and the use air pressure range of the light truck tire are added into the production model; sample tires are produced based on the production model, and the design effect is detected and verified on site. By investigating the use environment of the light truck tire, the accuracy of working parameter requirements of the light truck tire is improved, and by comprehensively considering a plurality of factors such as materials, structures and patterns of the tire and comprehensively considering the mutual influence relationship among structures of all parts, all properties of the tire are comprehensively improved.

Description

Technical Field

[0001] The invention relates to the technical field of tire design, and in particular to a design method for a light truck tire. Background Art

[0002] As a key component connecting the vehicle to the road, the performance of light truck tires directly affects the vehicle's driving safety, stability and comfort. However, traditional tire design methods often focus on improving the performance of a single structure, while ignoring the balance and optimization between the various parts of the tire structure. Summary of the invention

[0003] The present invention provides a light truck tire design method to solve the defect that the traditional tire design method in the prior art often focuses on improving the performance of a single structure, while ignoring the balance and optimization between the structures of various parts of the tire.

[0004] In one aspect, the present invention provides a method for designing a light truck tire, comprising the following steps: S1: Collect the usage environment data of light truck tires and generate the working parameter requirements of light truck tires; S2: Generate profile data of the light truck tire based on the working parameter requirements of the light truck tire; S3: Generate the size data and preliminary material selection of each part of the light truck tire structure based on the light truck tire profile data and the light truck tire working parameter requirements. The light truck tire structure includes a carcass, a belt layer, a tread, a apex strip and a sidewall; S4: Generate a preliminary model based on the light truck tire profile data, the size data of each part of the light truck tire structure and the preliminary material selection; S5: Simulate and analyze the preliminary model, adjust the size data and material selection of each part of the light truck tire structure, and obtain the production model; S6: Select the tread pattern based on the working parameter requirements of the light truck tire; S7: generating a use air pressure range of the light truck tire based on the working parameter requirements of the light truck tire; S8: Added tread pattern and operating pressure range for light truck tires to production models; S9: Produce sample tires based on the production model and conduct field tests to verify the design effect.

[0005] Preferably, step S5 comprises: S51: Simulate and analyze the preliminary model to determine whether the preliminary model meets the working parameter requirements of the light truck tire. If the preliminary model meets the working parameter requirements of the light truck tire, the preliminary model is directly used as a pending model. S52: If the preliminary model cannot meet the working parameter requirements of the light truck tire, adjust the size data and material selection of each part of the preliminary model to obtain a pending model; S53: Perform material verification on the pending model. If the material verification of the pending model passes, the pending model is output as the production model. If the material verification of the pending model fails, the part of the pending model that fails the material verification is corrected and then output as the production model.

[0006] Preferably, step S52 includes: S521: adjusting the structural dimensions of each part of the light truck tire to determine whether the working parameter requirements of the light truck tire are met; if the working parameter requirements of the light truck tire are met, no adjustment is made to the material selection of each part of the light truck tire; S522: If only adjusting the structural dimensions of each part of the light truck tire cannot meet the working parameter requirements of the light truck tire, then the structural dimensions of each part of the light truck tire are not adjusted, and only the material selection of each part of the light truck tire is adjusted to determine whether the working parameter requirements of the light truck tire are met; S523: If only adjusting the material selection of each part of the light truck tire cannot meet the working parameter requirements of the light truck tire, redesign the structural dimensions and material selection of each part of the light truck tire.

[0007] Preferably, the material verification step includes: S531: Determine whether the material selection of the rubber material under the belt layer and the main rubber material of the sidewall are the same. If they are the same, the material verification fails; S532: Determine whether the material composition of the apex rubber strip is equal to two. If the material composition of the apex rubber strip is not two, the material verification fails.

[0008] Preferably, the method further includes step S54: verifying the size data of the apex rubber strip, and step S54 includes: S541: Check the height of the triangle rubber strip; ; Wherein, SH is the height of the light truck tire cross section; a is the cross section height of the triangle rubber strip; S542: Verify the composite shape of the triangle rubber strip: ;in, It is the cross-sectional height of the colloid on the rim side of the triangle rubber strip.

[0009] Preferably, step S7 includes: S71: Calculate the minimum operating pressure of light truck tires; S72: Calculate the maximum operating pressure of light truck tires; S73: Generate a use air pressure range of the light truck tire according to the minimum working pressure of the light truck tire and the maximum working pressure of the light truck tire.

[0010] Preferably, step S71 calculates the minimum working pressure of the light truck tire based on the following formula; ;in, It is the minimum working pressure of light truck tires; The maximum permissible speed of the vehicle; A calculation reference value for a preset driving speed; is the safety factor of the light truck tire's load-bearing capacity; The total weight of the vehicle under the preset unloaded state; is the maximum load of the vehicle; N is the total number of light truck tires required to be loaded on the preset vehicle; g is the acceleration of gravity; B is the width of the light truck tire; F is the aspect ratio of the light truck tire; ln is the logarithmic function with e as the base; e is the natural base; It is the calculated reference value of the preset ambient temperature; The preset minimum allowable operating ambient temperature for light truck tires; is the unit temperature.

[0011] Preferably, step S72 calculates the maximum working pressure of the light truck tire based on the following formula: ;in, is the maximum working pressure of light truck tires; ln is the logarithmic function with e as the base; e is the natural base; It is the calculated reference value of the preset ambient temperature; The lowest ambient temperature when the light truck tire is working; is the unit temperature; is the minimum tensile strength of the materials in each part of the light truck tire structure; B is the width of the light truck tire; F is the aspect ratio of the light truck tire; D is the diameter of the light truck tire; The maximum permissible speed of the vehicle; A calculation reference value for a preset driving speed; are the weighted coefficients of the service life of the light truck tire and the mileage of the light truck tire respectively; S is the service life of the light truck tire; is the classification benchmark value of the light truck tire’s service life; L is the mileage of the light truck tire; It is the classification benchmark value of the mileage of light truck tires; It is the safety factor of the maximum working pressure of light truck tires; For unit area.

[0012] Compared with the prior art, the present invention has the following beneficial effects: By investigating the use environment of light truck tires, the working parameter requirements of light truck tires are more in line with the actual use needs of light truck tires. By comprehensively considering multiple factors such as the material, structure, pattern, etc. of the tire, and by comprehensively considering the mutual influence between the various parts of the structure, the comprehensive improvement of various tire performances is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a flow chart of the design method of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0016] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features 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 considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0017] Example 1 An embodiment of the present invention provides a method for designing a light truck tire, comprising the following steps: S1: Collect the usage environment data of light truck tires and generate the working parameter requirements of light truck tires; S2: Generate profile data of the light truck tire based on the working parameter requirements of the light truck tire; S3: Generate the size data and preliminary material selection of each part of the light truck tire structure based on the light truck tire profile data and the light truck tire working parameter requirements. The light truck tire structure includes a carcass, a belt layer, a tread, a apex strip and a sidewall; S4: Generate a preliminary model based on the light truck tire profile data, the size data of each part of the light truck tire structure and the preliminary material selection; S5: Simulate and analyze the preliminary model, adjust the size data and material selection of each part of the light truck tire structure, and obtain the production model; S6: Select the tread pattern based on the working parameter requirements of the light truck tire; S7: generating a use air pressure range of the light truck tire based on the working parameter requirements of the light truck tire; S8: Added tread pattern and operating pressure range for light truck tires to production models; S9: Produce sample tires based on the production model and conduct field tests to verify the design effect.

[0018] Preferably, step S5 comprises: S51: Simulate and analyze the preliminary model to determine whether the preliminary model meets the working parameter requirements of the light truck tire. If the preliminary model meets the working parameter requirements of the light truck tire, the preliminary model is directly used as a pending model. S52: If the preliminary model cannot meet the working parameter requirements of the light truck tire, adjust the size data and material selection of each part of the preliminary model to obtain a pending model; S53: Perform material verification on the pending model. If the material verification of the pending model passes, the pending model is output as the production model. If the material verification of the pending model fails, the part of the pending model that fails the material verification is corrected and then output as the production model.

[0019] In this embodiment, the use environment data of the light truck tire includes driving road conditions, load requirements, and vehicle driving speed range.

[0020] In this embodiment, the working parameter requirements include: the structure of the light truck tire installation position, the support and load-bearing performance of the light truck tire, the traction and braking performance of the light truck tire, the cushioning performance of the light truck tire, the wear resistance of the light truck tire, the environmental protection of the light truck tire, the maximum allowable driving speed of the light truck tire, and the allowable working environment temperature of the light truck tire.

[0021] In this embodiment, the profile data of the light truck tire includes: tire width, aspect ratio, and wheel hub outer diameter.

[0022] In this embodiment, the dimension data of each part of the light truck tire structure are all cross-sectional shapes of each part of the light truck tire structure.

[0023] The beneficial effects of the above technical solution are: By investigating the use environment of light truck tires, the working parameter requirements of light truck tires are more in line with the actual use requirements of light truck tires. By comprehensively considering multiple factors such as tire materials, structures, patterns, and the mutual influence between various parts of the structure, the comprehensive improvement of various tire performances is achieved. Specifically, the durability and wear resistance of the tire are improved, and the service life of the tire is extended; the handling performance and stability of the tire are optimized, and the driving safety of the vehicle is improved; the rolling resistance and noise level of the tire are reduced.

[0024] By integrating the independent designs of the various parts of the light truck tire structure to generate a preliminary model and performing simulation analysis on the preliminary model, the rationality of the overall structure of the tire in the theoretical design stage is ensured, and the situation that the various parts of the tire structure cannot reach the expected performance indicators after being combined, resulting in the overall performance of the light truck tire being unable to meet the working parameter requirements of the light truck tire, is avoided. Timely adjustments are made in the theoretical design stage, which reduces the cost of model verification, saves time for model verification, and improves the efficiency of the light truck tire design process.

[0025] After verifying and modifying the static working performance of the preliminary model, the pending model was obtained. By performing material verification on the pending model, it was ensured that the material selection of each part of the tire structure can be combined to meet the matching requirements of the material selection between different parts of the tire, thereby ensuring that the overall heat dissipation performance and mechanical transfer performance of the light truck tire meet the use requirements and reducing the probability of shoulder hollow and tire lip bulge problems in light truck tires.

[0026] Example 2 Based on Example 1, step S52 includes: S521: adjusting the structural dimensions of each part of the light truck tire to determine whether the working parameter requirements of the light truck tire are met; if the working parameter requirements of the light truck tire are met, no adjustment is made to the material selection of each part of the light truck tire; S522: If only adjusting the structural dimensions of each part of the light truck tire cannot meet the working parameter requirements of the light truck tire, then the structural dimensions of each part of the light truck tire are not adjusted, and only the material selection of each part of the light truck tire is adjusted to determine whether the working parameter requirements of the light truck tire are met; S523: If only adjusting the material selection of each part of the light truck tire cannot meet the working parameter requirements of the light truck tire, redesign the structural dimensions and material selection of each part of the light truck tire.

[0027] The beneficial effects of the above technical solution are: When adjusting the preliminary model, we choose to adjust only the structural dimensions, adjust only the material selection of each part, and redesign the structural dimensions and material selection of each part of the light truck tire in turn, thereby ensuring that the impact of the modification on the tire as a whole can be minimized during the modification process, thereby reducing the occurrence of secondary problems, avoiding an increase in the engineering workload of the light truck tire design process, and affecting the efficiency of the light truck tire design.

[0028] Example 3 Based on Example 1 or 2, the steps of material verification include: S531: Determine whether the material selection of the rubber material under the belt layer and the main rubber material of the sidewall are the same. If they are the same, the material verification fails; S532: Determine whether the material composition of the apex rubber strip is equal to two. If the material composition of the apex rubber strip is not two, the material verification fails.

[0029] The beneficial effects of the above technical solution are: The use of a three-composite sidewall and composite apex strip design can disperse the stress at the shoulder and bead positions, reducing the risk of shoulder voids and bead bulges. The composite apex rubber can reduce heat concentration and ensure a smooth transition of force, thereby improving the durability of the shoulder and bead positions of the tire under high load conditions, improving the premature occurrence of shoulder voids and bead bulges, and improving driving safety.

[0030] Example 4 On the basis of any one of the embodiments 1-3, the method further includes step S54: verifying the size data of the apex rubber strip, and step S54 includes: S541: Check the height of the triangle rubber strip; ; Wherein, SH is the height of the light truck tire cross section; a is the cross section height of the triangle rubber strip; S542: Verify the composite shape of the triangle rubber strip: ;in, It is the cross-sectional height of the colloid on the rim side of the triangle rubber strip.

[0031] The beneficial effects of the above technical solution are: By limiting the height and composite shape of the apex rubber strip, the extended design of the apex rubber increases the stress transmission from the bead to the sidewall, and disperses the stress of the bead area to smoothly transition to the soft sidewall. The composite shape design must meet the needs of strengthening the rigid support and stress transmission of the bead, and improve the working performance of the light truck tire.

[0032] Example 5 Based on any one of Embodiments 1-4, step S7 includes: S71: Calculate the minimum operating pressure of light truck tires; S72: Calculate the maximum operating pressure of light truck tires; S73: Generate a use air pressure range of the light truck tire according to the minimum working pressure of the light truck tire and the maximum working pressure of the light truck tire.

[0033] Preferably, step S71 calculates the minimum working pressure of the light truck tire based on the following formula; ;in, It is the minimum working pressure of light truck tires; The maximum permissible speed of the vehicle; A calculation reference value for a preset driving speed; is the safety factor of the light truck tire's load-bearing capacity (the value is greater than 1); The total weight of the vehicle under the preset unloaded state; is the maximum load of the vehicle; N is the total number of light truck tires required to be loaded on the preset vehicle; g is the acceleration of gravity; B is the width of the light truck tire; F is the aspect ratio of the light truck tire; ln is the logarithmic function with e as the base; e is the natural base; It is the calculated reference value of the preset ambient temperature; The preset minimum allowable operating ambient temperature for light truck tires; is the unit temperature.

[0034] Preferably, step S72 calculates the maximum working pressure of the light truck tire based on the following formula: ;in, is the maximum working pressure of light truck tires; ln is the logarithmic function with e as the base; e is the natural base; It is the calculated reference value of the preset ambient temperature; The lowest ambient temperature when the light truck tire is working; is the unit temperature; is the minimum tensile strength of the materials in each part of the light truck tire structure; B is the width of the light truck tire; F is the aspect ratio of the light truck tire; D is the diameter of the light truck tire; The maximum permissible speed of the vehicle; A calculation reference value for a preset driving speed; are the weighted coefficients of the service life of the light truck tire and the mileage of the light truck tire respectively; S is the service life of the light truck tire; is the classification benchmark value of the light truck tire’s service life; L is the mileage of the light truck tire; It is the classification benchmark value of the mileage of light truck tires; is the safety factor of the maximum working pressure of light truck tires (the value is greater than 1); For unit area.

[0035] In this embodiment, the calculation reference value of the driving speed is the vehicle driving speed under ideal experimental conditions, which is 60 km / h in this embodiment.

[0036] In this embodiment, the calculation reference value of the ambient temperature is the ambient temperature under a standard environment, which is 23°C±1°C in this embodiment.

[0037] The beneficial effects of the above technical solution are: By calculating the minimum working pressure of the light truck tire, the excellent performance of the light truck tire during use is ensured. By calculating the maximum working pressure of the light truck tire, the safety of the light truck tire during use is ensured. By obtaining the operating air pressure range of the light truck tire and providing the operating air pressure range of the light truck tire to the user, the user can quickly determine whether the actual air pressure of the light truck tire is within a reasonable range when testing the actual air pressure of the light truck tire during use, thereby ensuring the safety of the light truck tire during use and maintaining excellent working performance.

[0038] When calculating the minimum working pressure of a light truck tire, the maximum load of the light truck tire is calculated based on The minimum working pressure required for light truck tires under ideal experimental conditions is calculated, and then the maximum allowable driving speed and minimum operating temperature required for light truck tires are respectively measured by and The minimum working pressure under ideal experimental conditions is corrected to ensure that light truck tires can maintain excellent working performance within a reasonable working range.

[0039] When calculating the maximum working pressure of a light truck tire, The maximum allowable working pressure of the weakest position of the light truck tire under ideal experimental conditions is calculated, and then and The maximum allowable working pressure under ideal experimental conditions is corrected to obtain the maximum allowable working pressure at the weakest position of the light truck tire under actual working conditions. The maximum allowable working pressure at the weakest position of the light truck tire under actual working conditions is used to represent the maximum allowable working pressure of the light truck tire as a whole under actual working conditions, thereby ensuring the safety of the light truck tire during use. The maximum working pressure of the light truck tire is corrected according to the service life of the light truck tire and the mileage of the light truck tire, so as to obtain the maximum working pressure of the light truck tire under different usage levels (in actual use, several representative service lives and mileages of the light truck tire are selected for calculation, so as to obtain the maximum working pressure of the light truck tire corresponding to several different service lives and mileage ranges of the light truck tire), thereby realizing the estimation of the maximum allowable working pressure of the light truck tire without having to conduct detailed inspection of the light truck tire, so as to facilitate vehicle users to easily understand the changes in the maximum allowable working pressure of the light truck tire, so as to timely discover the hidden dangers in the use of the light truck tire, and further ensure the safety of the use of the light truck tire.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for designing a light truck tire, characterized in that: The steps include: S1: Collect the usage environment data of light truck tires and generate the working parameter requirements of light truck tires; S2: Generate profile data of the light truck tire based on the working parameter requirements of the light truck tire; S3: Generate the size data and preliminary material selection of each part of the light truck tire structure based on the light truck tire profile data and the light truck tire working parameter requirements. The light truck tire structure includes a carcass, a belt layer, a tread, a apex strip and a sidewall; S4: Generate a preliminary model based on the light truck tire profile data, the size data of each part of the light truck tire structure and the preliminary material selection; S5: Simulate and analyze the preliminary model, adjust the size data and material selection of each part of the light truck tire structure, and obtain the production model; S6: Select the tread pattern based on the working parameter requirements of the light truck tire; S7: generating a use air pressure range of the light truck tire based on the working parameter requirements of the light truck tire; S8: Added tread pattern and operating pressure range for light truck tires to production models; S9: Produce sample tires based on the production model and conduct field tests to verify the design effect.

2. A method for designing a light truck tire according to claim 1, characterized in that: Step S5 includes: S51: Simulate and analyze the preliminary model to determine whether the preliminary model meets the working parameter requirements of the light truck tire. If the preliminary model meets the working parameter requirements of the light truck tire, the preliminary model is directly used as a pending model. S52: If the preliminary model cannot meet the working parameter requirements of the light truck tire, adjust the size data and material selection of each part of the preliminary model to obtain a pending model; S53: Perform material verification on the pending model. If the material verification of the pending model passes, the pending model is output as the production model. If the material verification of the pending model fails, the part of the pending model that fails the material verification is corrected and then output as the production model.

3. A method for designing a light truck tire according to claim 2, characterized in that: Step S52 includes: S521: adjusting the structural dimensions of each part of the light truck tire to determine whether the working parameter requirements of the light truck tire are met; if the working parameter requirements of the light truck tire are met, no adjustment is made to the material selection of each part of the light truck tire; S522: If only adjusting the structural dimensions of each part of the light truck tire cannot meet the working parameter requirements of the light truck tire, then the structural dimensions of each part of the light truck tire are not adjusted, and only the material selection of each part of the light truck tire is adjusted to determine whether the working parameter requirements of the light truck tire are met; S523: If only adjusting the material selection of each part of the light truck tire cannot meet the working parameter requirements of the light truck tire, redesign the structural dimensions and material selection of each part of the light truck tire.

4. A method for designing a light truck tire according to claim 2, characterized in that: The steps of material verification include: S531: Determine whether the material selection of the rubber material under the belt layer and the main rubber material of the sidewall are the same. If they are the same, the material verification fails; S532: Determine whether the material composition of the apex rubber strip is equal to two. If the material composition of the apex rubber strip is not two, the material verification fails.

5. The method for designing a light truck tire according to claim 2, characterized in that: The step S54 is also included: verifying the size data of the apex rubber strip, and the step S54 includes: S541: Check the height of the triangle rubber strip; ; Wherein, SH is the height of the light truck tire cross section; a is the cross section height of the triangle rubber strip; S542: Verify the composite shape of the triangle rubber strip: ;in, It is the cross-sectional height of the colloid on the rim side of the triangle rubber strip.

6. The method for designing a light truck tire according to claim 1, characterized in that: Step S7 includes: S71: Calculate the minimum operating pressure of light truck tires; S72: Calculate the maximum operating pressure of light truck tires; S73: Generate a use air pressure range of the light truck tire according to the minimum working pressure of the light truck tire and the maximum working pressure of the light truck tire.

7. A method for designing a light truck tire according to claim 6, characterized in that: Step S71 calculates the minimum working pressure of the light truck tire based on the following formula; ;in, It is the minimum working pressure of light truck tires; The maximum permissible speed of the vehicle; A calculation reference value for a preset driving speed; is the safety factor of the light truck tire's load-bearing capacity; The total weight of the vehicle under the preset unloaded state; is the maximum load of the vehicle; N is the total number of light truck tires required to be loaded on the preset vehicle; g is the acceleration of gravity; B is the width of the light truck tire; F is the aspect ratio of the light truck tire; ln is the logarithmic function with e as the base; e is the natural base; It is the calculated reference value of the preset ambient temperature; The preset minimum allowable operating ambient temperature for light truck tires; is the unit temperature.

8. The method for designing a light truck tire according to claim 6, characterized in that: Step S72 calculates the maximum operating pressure of the light truck tire based on the following formula; ;in, is the maximum working pressure of light truck tires; ln is the logarithmic function with e as the base; e is the natural base; It is the calculated reference value of the preset ambient temperature; The lowest ambient temperature when the light truck tire is working; is the unit temperature; is the minimum tensile strength of the materials in each part of the light truck tire structure; B is the width of the light truck tire; F is the aspect ratio of the light truck tire; D is the diameter of the light truck tire; The maximum permissible speed of the vehicle; A calculation reference value for a preset driving speed; are the weighted coefficients of the service life of the light truck tire and the mileage of the light truck tire respectively; S is the service life of the light truck tire; is the classification benchmark value of the light truck tire’s service life; L is the mileage of the light truck tire; It is the classification benchmark value of the mileage of light truck tires; It is the safety factor of the maximum working pressure of light truck tires; For unit area.

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