Load-carrying radial tire with low rolling resistance and high abrasion

Abstract

The invention discloses a low-rolling-resistance and high-abrasion truck radial tire, and relates to the technical field of tire design, the truck radial tire comprises a tire body, a tread, a tire body, a sidewall, a tire bead, a belted layer, a steel wire ring and apex, the relation of the outer contour of the tire body is h / D > = 1.2% and < = 5.2%, the radial height difference between the end point of the outer contour of the tread and the middle point of the outer contour of the tread is h, and the width of the tire body is 0.5 mm. The vertical distance from the widest end point position in the belted layer to the grounding contour is D, the relationship of the inner contour of the tire body is (Gs-h) / Gc is greater than or equal to 0.98 and less than or equal to 1.02, the vertical distance from the end point of the outer contour of the tread to the inner contour is Gs, and the vertical distance from the midpoint of the outer contour of the tread to the inner contour is Gc. The design scheme of the low-rolling-resistance and high-abrasion truck radial tire is obtained by starting from key design elements of the tire and considering the relation between the rolling resistance and the abrasion of the tire, more fuel oil can be saved, and the abrasion mileage is longer.

Description

Technical Field

[0001] The invention relates to the technical field of tire design, in particular to a low rolling resistance and high wear load-bearing radial tire. Background Art

[0002] In order to reduce fuel consumption, countries around the world continue to set new labeling regulations, emission standards, and tighten market access standards. The development of low rolling resistance tires and core technology research is bound to become a wrestling point for tire companies' future competitiveness. When major OEMs are working on lightweighting vehicles and improving fuel economy, they will inevitably put forward lightweight and low rolling resistance performance requirements for their components - tires. At the same time, in order to improve the economic benefits of transportation, the demand for increasing the wear life of tires has also come along. At present, the main design principles of low rolling resistance tires are: first, reducing the rolling resistance by lightweighting the tire, reducing the use of materials or reducing the pattern depth and tread contact width; second, reducing the hysteresis loss of the rubber compound and optimizing the formula to achieve the effect of reducing rolling resistance.

[0003] The disadvantage of the prior art is that by reducing the use of materials, especially by reducing the pattern depth and the tread contact width, the amount of tread rubber can be quickly reduced, but the service life of the tire will be directly lost. The use of rubber with low hysteresis loss will lead to poor cut resistance of the tire, thus affecting the life of the tire.

[0004] Based on this, a low rolling resistance and high wear load-bearing radial tire is now provided, which can eliminate the disadvantages of the existing device. Summary of the invention

[0005] The object of the present invention is to provide a low rolling resistance and high wear load-bearing radial tire to solve the problems in the background technology.

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

[0007] A low rolling resistance and high wear load-bearing radial tire, a low rolling resistance and high wear load-bearing radial tire, comprising a tire body, the tire body comprising a tread, a carcass, a sidewall, a bead, a belt layer, a wire ring and an apex rubber, a carcass is provided at the bottom of the tread, a sidewall is provided on the outer side of the carcass, a bead is adhered to the inner side, a belt layer is adhered between the carcass and the bead by means of a cushion adhesive, a wire ring is provided at the bottom of the carcass, and the carcass is adhered to the belt layer by means of a cushion adhesive. The interior of the tire bead is filled with apex rubber, the relationship of the outer contour of the tire body is h / D ≥ 1.2% and ≤ 5.2%, the radial height difference from the end point of the tread outer contour to the midpoint of the tread outer contour is h, the vertical distance from the widest end point in the belt layer to the ground contact contour is D, the relationship of the inner contour of the tire body is (Gs-h) / Gc ≥ 0.98 and ≤ 1.02, the vertical distance from the end point of the tread outer contour to the inner contour is Gs, and the vertical distance from the midpoint of the tread outer contour to the inner contour is Gc.

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

[0009] In an optional solution: there is a widest belt layer in the belt layer along the transverse direction of the tread, and the widest belt layer is the working layer of the finished tire. The expansion rate from the semi-finished product to the finished tire includes the expansion rate Lc at the center position and the expansion rate Le at the end position. The expansion rate Lc at the center position is ≤3%, where Lc is obtained by controlling the circumference of the belt layer fitting drum.

[0010] In an optional solution: the expansion rate Le at the end point position cannot be negative and has a value range of 0-1%, wherein Le is adjusted by designing the cushion rubber and profile rubber in the belt layer.

[0011] In an optional scheme: the expansion rate of the endpoint position Le = (OD-2*h*Wf*Wf / TDW / TDW)-2*Gwt*F / Dwt-1, wherein OD is the outer diameter, h is the radial height difference from the end point of the tread outer contour to the midpoint of the tread outer contour, Wf is the width of the widest beam layer, TDW is the tire running surface width, Gwt is the radial height from the end point of the widest beam layer to the outer contour of the tread, F is the correction factor, and Dwt is the diameter of the middle position of the widest beam layer.

[0012] In an optional scheme: the correction factor is F = sin(A)*TAN(A)+cos(A), where h is the radial height difference from the end point of the tread outer contour to the midpoint of the tread outer contour, Wf is the width of the widest belt layer, TDW is the tire running surface width, A is an angle, and ATAN is the inverse tangent value.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention takes into account the relationship between the rolling resistance and wear of the tire by starting from the key design elements of the tire. The outer contour of the tire is obtained by controlling the ground contact contour design, and the inner contour design method is to obtain the inner contour of the tire by controlling the vertical distance of the key position. The structural design controls the expansion rate from the semi-finished product to the finished tire, including the expansion rate Lc at the center position and the expansion rate Le at the end position, so as to obtain the design scheme of the low rolling resistance and high wear load-bearing radial tire. Then, through the above test comparison, it can be concluded that the rolling resistance label grade of the low rolling resistance and high wear tire and the ordinary low rolling resistance tire can both reach the EU A grade, but its durability is 23% higher than that of the ordinary low rolling resistance tire. The low rolling resistance and high wear tire described in the present invention can save more fuel and have a longer wear mileage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of the outline design of the present invention.

[0017] Notes on the accompanying drawings: 11. Tire body; 1. Tread; 2. Carcass; 3. Sidewall; 4. Bead; 5. Belt; 6. Wire bead; 7. Apex rubber. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] In one embodiment, Figure 1-Figure 2As shown, a low rolling resistance and high wear load-bearing radial tire includes a tire body 11, and the tire body 11 includes a tread 1, a carcass 2, a sidewall 3, a bead 4, a belt layer 5, a wire ring 6 and an apex rubber 7. The bottom of the tread 1 is provided with a carcass 2, the outer side of the carcass 2 is provided with a sidewall 3, and the inner side is adhered with a bead 4, the belt layer 5 is adhered between the carcass 2 and the bead 4 by cushion glue, the bottom of the carcass 4 is provided with a wire ring 6, and the carcass 4 is adhered with the belt layer 5 by cushion glue. The tire bead 4 is filled with an apex rubber 7, characterized in that: the relationship between the outer contour of the tire body 11 is h / D≥1.2% and ≤5.2%, the radial height difference from the outer contour end point of the tread 1 to the outer contour midpoint of the tread 1 is h, the vertical distance from the widest end point in the belt layer 5 to the ground contour is D, the relationship between the inner contour of the tire body 11 is (Gs-h) / Gc≥0.98 and ≤1.02, the vertical distance from the outer contour end point of the tread 1 to the inner contour is Gs, and the vertical distance from the outer contour midpoint of the tread 1 to the inner contour is Gc. The tire contour design includes an outer contour and an inner contour. The outer contour of the tire is obtained by controlling the ground contour design through the outer contour design method, and the inner contour of the tire is obtained by controlling the vertical distance of the key position through the inner contour design method.

[0020] In one embodiment, Figure 1-Figure 2 As shown, there is a widest belt layer in the belt layer 5 along the transverse direction of the tread, and the widest belt layer 5 is the working layer of the finished tire, and its expansion rate is calculated based on this. The expansion rate from the semi-finished product to the finished tire includes the expansion rate Lc at the center position and the expansion rate Le at the end position, and the expansion rate Lc at the center position is ≤3%, wherein Lc is obtained by controlling the circumference of the belt layer bonding drum, and is used to control the expansion rate at the center position of the semi-finished product to the finished tire.

[0021] In one embodiment, Figure 1-Figure 2 As shown, the expansion rate Le at the end point position cannot be negative and has a value range of 0-1%, wherein Le is adjusted by designing the cushion rubber and the profile rubber in the belt layer 5 to ensure that the end point is not in a compressed state, thereby improving durability.

[0022] In one embodiment, Figure 1-Figure 2 As shown, the expansion rate of the endpoint position Le = (OD-2*h*Wf*Wf / TDW / TDW)-2*Gwt*F / Dwt-1, wherein OD is the outer diameter, h is the radial height difference from the end point of the outer contour of tread 1 to the midpoint of the outer contour of tread 1, Wf is the width of the widest beam layer, TDW is the tire running surface width, Gwt is the radial height from the end point of the widest beam layer 5 to the outer contour of tread 1, F is the correction factor, and Dwt is the diameter of the middle position of the widest beam layer 5, which is used to control the expansion rate of the endpoint position of the semi-finished product to the finished tire.

[0023] In one embodiment, Figure 1-Figure 2 As shown, the correction factor is F = sin(A)*TAN(A)+cos(A), where h is the radial height difference from the end point of the outer contour of tread 1 to the midpoint of the outer contour of tread 1, Wf is the width of the widest beam layer 5, TDW is the tire running surface width, A is an angle, and ATAN is the inverse tangent value.

[0024] 1. Referring to the present invention, the profile and structure of 315 / 80R22.5 are designed according to the design parameters in Table 1;

[0025] Table 1 Key design parameters of low rolling resistance and high wear tires

[0026]

[0027] 2. The following is a test comparison of the low rolling resistance and high wear tire of the present invention with the traditional structure tire and the ordinary low rolling resistance tire. Taking 315 / 80R22.5 as an example, the rubber material is all low rolling resistance formula, and the rolling resistance test, durability performance test and high-speed performance test are carried out before and after adjustment;

[0028] Table 2 Comparison of rolling resistance coefficients of low rolling resistance and high wear tires, traditional tires, and ordinary low rolling resistance tires

[0029]

[0030] Table 3 Durability test standards for radial truck tires

[0031]

[0032]

[0033]

[0034] Table 4 Comparison of the durability performance of low rolling resistance and high wear tires, traditional tires, and ordinary low rolling resistance tires

[0035]

[0036] Table 5 High-speed performance test standard for radial truck tires

[0037]

[0038] Table 6 Comparison of high-speed performance of low rolling resistance and high wear tires, traditional tires, and ordinary low rolling resistance tires

[0039]

[0040] The above embodiment discloses a low rolling resistance and high wear load-bearing radial tire, wherein the contour design method and the structural design method are respectively adopted, and the outer contour and inner contour design method are adopted, the outer contour of the tire is obtained by controlling the ground contact contour design, and the inner contour of the tire is obtained by controlling the vertical distance of the key position, and at the same time, in the structural design, the expansion rate of the center position and the end position of the semi-finished product to the finished tire is controlled, so as to obtain the design scheme of the low rolling resistance and high wear load-bearing radial tire, and then through the above test comparison, it can be concluded that the rolling resistance label grade of the low rolling resistance and high wear tire and the ordinary low rolling resistance tire can reach the EU A grade, but its durability is improved by 23% compared with the ordinary low rolling resistance tire. The low rolling resistance and high wear tire described in the present invention can save more fuel and have a longer wear mileage.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A low rolling resistance and high wear load-bearing radial tire, comprising a tire body (11), the tire body (11) comprising a tread (1), a carcass (2), a sidewall (3), a bead (4), a belt layer (5), a wire bead (6) and an apex rubber (7), the bottom of the tread (1) being provided with a carcass (2), the outer side of the carcass (2) being provided with a sidewall (3), the inner side of the bead (4) being adhered with a wire bead (5), the carcass (2) and the bead (4) being adhered with a cushioning agent, the bottom of the carcass (4) being provided with a wire bead (6), the carcass (4) being adhered with a belt layer (2) by means of a cushioning agent, the interior of the bead (4) being filled with an apex rubber (7), characterized in that: The relationship of the outer contour of the tire body (11) is h / D≥1.2% and ≤5.2%, the radial height difference from the outer contour end point of the tread (1) to the outer contour midpoint of the tread (1) is h, the vertical distance from the widest end point position in the belt layer (5) to the ground contact contour is D, and the relationship of the inner contour of the tire body (11) is (Gs-h) / Gc≥0.98 and ≤1.02, the vertical distance from the outer contour end point of the tread (1) to the inner contour is Gs, and the vertical distance from the outer contour midpoint of the tread (1) to the inner contour is Gc.

2. A low rolling resistance and high wear load-bearing radial tire according to claim 1, characterized in that: The belt layer (5) has the widest belt layer in the transverse direction of the tread, and the widest belt layer (5) is the working layer of the finished tire. The expansion rate from the semi-finished product to the finished tire includes the expansion rate Lc at the center position and the expansion rate Le at the end position. The expansion rate Lc at the center position is ≤3%, wherein Lc is obtained by controlling the circumference of the belt layer laminating drum.

3. A low rolling resistance and high wear load-bearing radial tire according to claim 2, characterized in that: The expansion rate Le at the end point position cannot be negative and has a value range of 0-1%, wherein Le is adjusted by the design of the cushion rubber and the profile rubber in the belt layer (5).

4. The low rolling resistance and high wear load-bearing radial tire according to claim 2, characterized in that: The expansion rate at the end point position Le = (OD-2*h*Wf*Wf / TDW / TDW)-2*Gwt*F / Dwt-1, wherein OD is the outer diameter, h is the radial height difference from the end point of the outer contour of the tread (1) to the midpoint of the outer contour of the tread (1), Wf is the width of the widest beam layer, TDW is the tire running surface width, Gwt is the radial height from the end point of the widest beam layer (5) to the outer contour of the tread (1), F is the correction factor, and Dwt is the diameter of the middle position of the widest beam layer (5).

5. The low rolling resistance and high wear load-bearing radial tire according to claim 4, characterized in that: The correction factor is F=sin(A)*TAN(A)+cos(A), wherein h is the radial height difference from the end point of the outer contour of the tread (1) to the midpoint of the outer contour of the tread (1), Wf is the width of the widest beam layer (5), TDW is the tire running surface width, A is an angle, and ATAN is the inverse tangent value.

Images