An all-steel radial high-mileage long-distance truck tire

Abstract

The present application belongs to the field of tire patterns, and discloses an all-steel radial high-mileage long-distance truck tire. The tire tread portion is provided with a plurality of circumferential main grooves extending continuously along the circumference of the tire, and the circumferential main grooves divide the tread portion into a plurality of land portions, and a circumferential fine knife groove and a first inclined groove are formed in the land portion, the circumferential fine knife groove is located on the center line of the land portion and extends continuously in an S-shape along the circumference of the tire, the first inclined groove extends from the circumferential main groove to the inner side of the tire axial direction and bends to one side of the tire rotation direction, and the first inclined groove is interrupted near the circumferential fine knife groove. The tire can reduce the rolling resistance of high-mileage long-distance truck tires and meet high mileage requirements.

Description

Technical Field

[0001] The present application relates to the technical field of tire patterns, and in particular to an all-steel radial high-mileage long-distance truck tire. Background Art

[0002] At present, the world has increasingly higher requirements for automobile emissions. As the only part in contact with the ground, the rolling resistance of automobile tires is an important factor in fuel consumption and is widely concerned. Countries have introduced green tire regulations one after another. In addition, with the increasing requirements for particulate matter pollution and the concern about resource consumption, the service life of tires is also required to be extended.

[0003] In the related art, 5Rib (rib) can be used in long-distance guide pattern design in combination with a matching groove or slot design. Its advantages are excellent drainage performance, good direction maintenance, and good performance for medium and long distance use. However, it cannot take into account the requirements of lower rolling resistance and higher mileage when used at high speeds.

[0004] In the related technology, 4Rib can also be used in the design of long-distance guide patterns. It is mainly used for mixed patterns and has advantages in resisting block falling and improving wear performance, but is not conducive to reducing tire heat generation and improving high-speed performance.

[0005] Therefore, there is an urgent need to provide an all-steel radial high-mileage long-distance truck tire that has lower rolling resistance and higher mileage. Summary of the invention

[0006] In order to solve the technical problem in the prior art that high-mileage long-distance truck tires have high rolling resistance and cannot meet high mileage requirements, the present application provides an all-steel radial high-mileage long-distance truck tire.

[0007] In order to solve the above technical problems, this application adopts the following technical solutions:

[0008] An all-steel radial high-mileage long-distance truck tire has a tread portion, wherein the tread portion is provided with a plurality of circumferential main grooves extending continuously along the circumference of the tire, wherein the circumferential main grooves divide the tread portion into a plurality of land portions, wherein circumferential fine knife grooves and first inclined grooves are formed in the land portions, wherein the circumferential fine knife grooves are located on the center lines of the land portions and extend continuously in an S-shape along the circumference of the tire, wherein the first inclined grooves extend from the circumferential main grooves toward the inner side of the tire axial direction and bend toward one side of the tire rotation direction, and wherein the first inclined grooves are interrupted near the circumferential fine knife grooves.

[0009] The circumferential main groove of the present application can effectively increase the ground contact area of ​​the tread, increase the pattern footprint, thereby reducing the ground contact pressure per unit area, and improving the wear resistance of the tire. Preferably, the width of the circumferential main groove is 10-15 mm, and the widened circumferential continuous Rib pattern design improves the overall rigidity and ground contact rate of the pattern block, which can effectively improve its wear resistance; the groove wall of the circumferential main groove forms an angle θ with the tire radial direction. 2 Tilt, preferably θ 2 The angle range is 10-20°, which not only ensures the stability of the pattern blocks, but also reduces the occurrence of stone clamping. The circumferential main groove can not only increase the drainage of the center of the tread, but also ensure its stability in straight-line driving.

[0010] The land portion has a second inclined groove extending axially outward from a circumferential main groove of the tire and bending toward one side of the tire rotation direction. The first inclined groove and the second inclined groove are alternately arranged along the circumference of the tire in the land portion. The land portion is formed as a vine-shaped rib continuous along the circumference of the tire in the tread portion.

[0011] The angle θ of the first inclined groove relative to the tire circumferential direction of the present invention 1 As the angle gradually decreases toward the side of the circumferential fine knife groove, the first inclined groove near the circumferential fine knife groove is approximately parallel to the tire circumference; the preferred angle θ 1 28-75°.

[0012] More preferably, the width of the first inclined groove is 1.5-3mm, the depth is 1.5-3mm, the groove wall of the first inclined groove is perpendicular to the tire tread; the width of the circumferential fine knife groove is 1-2mm, and the bottom of the inclined knife groove is a full arc structure; the first inclined groove and the circumferential fine knife groove are located in the central land portion.

[0013] Preferably, the bottom of the first inclined groove is inlaid with an inclined knife groove in the same inclination direction as the first inclined groove, and the inclined knife groove can maintain the rolling resistance and wet grip performance of the tire in the middle and late stages of use, and maintain the handling performance of the tire throughout its life; in order to drain water in the middle and late stages of the tire, the starting and ending ends of the inclined knife groove are connected to the starting and ending ends of the first inclined groove, so that there is no cavity between the two, and the drainage function of the tire in the middle and late stages remains unchanged. More preferably, the width of the inclined knife groove is 0.4-1mm, and its depth is 1.5mm deeper than the depth of the first inclined groove.

[0014] The land portion is provided with an arc-shaped shallow groove extending obliquely from a circumferential main groove toward the outer side of the tire axial direction, the arc-shaped shallow groove is interrupted near the center line of the land portion, the groove wall of the arc-shaped shallow groove is perpendicular to the tire tread, and the bottom of the arc-shaped shallow groove is inlaid with an arc-shaped knife groove with the same inclination direction as the arc-shaped shallow groove.

[0015] Preferably, the length of the arc-shaped shallow groove and the arc-shaped knife groove is 1 / 2-4 / 5 of the width of the land portion where they are located, there is no cavity between the arc-shaped shallow groove and the arc-shaped knife groove, and the drainage function of the tire in the middle and late stages remains unchanged. The width of the arc-shaped shallow groove is 1.5-2.5mm, and the depth is 1.5-3mm; the width of the arc-shaped knife groove is 0.4-1mm, and its depth is 1.5mm deeper than the depth of the arc-shaped shallow groove, and the bottom of the arc-shaped knife groove is a full arc structure. The arc-shaped shallow groove on the shoulder land portion can further improve the drainage performance of the new tire, thereby improving the wet grip of the tire. The main purpose of the arc-shaped knife groove is to maintain the wet grip performance of the tire in the middle and late stages of use, and to maintain the handling performance of the tire throughout its life.

[0016] The land portion is provided with transverse fine knife grooves extending from the circumferential main grooves in the axial direction of the tire, the width of the transverse fine knife grooves is 0.4-0.8 mm, the length is 2-5 mm, and the depth of the transverse fine knife grooves is 40-80% of the depth of the circumferential main grooves. The transverse fine knife grooves can reduce the rigidity of the edge of the tread strip in the land portion, improve wear, and reduce deformed wear; more quickly break the water film on the tread contact surface, remove the moisture on the surface, improve the wet grip performance, and provide additional grip on snowy roads; at the same time, the transverse fine knife grooves can absorb the pumping noise generated when the tread grooves touch the ground during driving, making the ride more comfortable and more environmentally friendly. More preferably, the spacing between adjacent transverse fine knife grooves in the tire circumferential direction is 1 / 4-1 / 10 of the spacing between adjacent first inclined grooves in the tire circumferential direction.

[0017] The tire of the present application is provided with a plurality of circumferential main grooves extending continuously along the circumference of the tire in the tread portion, and the circumferential main grooves divide the tread portion into a plurality of land portions, and the land portions are provided with a first inclined groove, and the first inclined groove is close to the circumference at a position close to the S-shaped circumferential fine grooves extending continuously, so that the rolling resistance of the tire is lower during driving, the drainage performance of the new tire is improved, the water film on the ground can be effectively broken, and a better wet grip performance is provided. The S-shaped circumferential fine grooves extending continuously can reduce the impact noise between the pattern blocks and the road surface, and improve driving comfort. At the same time, it can also reduce the rigidity of the edge of the pattern groove, prevent local wear of the pattern blocks, and extend the service life of the tire.

[0018] The first inclined grooves and the arc-shaped shallow grooves are provided with a variety of pattern pitches, and the width of each pitch is set according to a certain ratio. The pitches are arranged irregularly along the circumference of the tire, which can effectively reduce the pitch noise caused by pitch resonance.

[0019] The foregoing and other objects, features and advantages of the present application will become apparent from the following more particular description of certain embodiments of the present application as illustrated in the accompanying drawings in which like reference numerals represent like parts of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An expanded view of a tire tread portion of an embodiment provided in the present application;

[0021] Figure 2 for Figure 1 BB line cross-sectional view;

[0022] Figure 3 for Figure 1 B'-B' line cross-sectional view;

[0023] Figure 4 for Figure 1 DD line cross-sectional view;

[0024] Figure 5 The present invention is a development diagram of the tread portion of a high-mileage long-distance truck tire provided in the related art. DETAILED DESCRIPTION

[0025] The present application discloses an all-steel radial high-mileage long-distance truck tire. Those skilled in the art can refer to the content of this article and make appropriate improvements to implement it. It is particularly important to point out that all similar replacements and modifications are obvious to those skilled in the art, and they are all deemed to be included in this application. The methods and applications of this application have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the methods and applications described herein without departing from the content, spirit and scope of this application to implement and apply the technology of this application.

[0026] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with specific implementation methods.

[0027] Figure 5 The following is an expanded view of the tread of a high-mileage long-distance truck tire provided in the related art. 11 in the figure is the main groove of the pattern, which generally occupies 20%-30% of the floor space; 12 in the figure is the tread strip, which generally occupies 70%-80% of the floor space. In this way, the width is relatively narrow, which has the advantage of better drainage performance, but it will reduce the effective rubber usage of the tire at the same tread depth, which is not conducive to improving wear; and because the narrow tread strip is easily subjected to force and creeps during driving, the tire wear and rolling resistance performance are further reduced. Therefore, under the same wear requirements, ordinary patterns require a deeper tread groove depth, which further increases the rolling resistance of the tire.

[0028] In order to solve the above-mentioned technical problem that the high-mileage long-distance truck tire has high rolling resistance and cannot meet the high mileage requirements, the all-steel radial high-mileage long-distance truck tire provided by the present application is now introduced in detail.

[0029] Figure 1-Figure 4 For the preferred embodiment of this application, Figure 1As shown, an all-steel radial high-mileage long-distance truck tire has a tread portion, wherein the tread portion is provided with a plurality of circumferential main grooves 1 extending continuously along the circumference of the tire, and the circumferential main grooves divide the tread portion into a plurality of land portions 2. The circumferential main grooves in this embodiment include central circumferential main grooves 1a and shoulder circumferential main grooves 1b, and the tread portion is divided into a central land portion 2a and a shoulder land portion 2b by the central circumferential main grooves 1a and the shoulder circumferential main grooves 1b. The areas between the shoulder land portions 2b on both sides and the central circumferential main grooves 1a on the equator C are the central land portions 2a, and the areas between the shoulder circumferential main grooves 1b on both sides and a tread end Te are the shoulder land portions 2b.

[0030] In a preferred embodiment, the width of the circumferential main groove 1 is 10-15 mm, and the widened circumferential continuous Rib pattern design improves the overall rigidity and ground contact rate of the pattern block, and can effectively improve its wear resistance; Figure 4 As shown, the groove wall of the circumferential main groove forms an angle θ with the tire radial direction. 2 Tilt, preferably θ 2 The angle range is 10-20°, which not only ensures the stability of the pattern block, but also reduces the occurrence of stone clamping. The circumferential main groove 1 in this embodiment preferably adopts a linear design or a serrated design, but is not limited to a linear or serrated design. In addition to increasing the drainage of the center part of the tread, the circumferential main groove 1 can also ensure its stability in straight-line driving.

[0031] The all-steel radial high-mileage long-distance truck tire provided in the present application has a circumferential thin knife groove 3 and a first inclined groove 4a formed in the land portion, the circumferential thin knife groove 3 is located on the center line of the land portion and extends continuously in an S-shape along the tire circumference, the first inclined groove 4a extends from a circumferential main groove to the inner side of the tire axial direction and bends to one side of the tire rotation direction R, and the first inclined groove 4a is interrupted near the circumferential thin knife groove. In this preferred embodiment, the first inclined groove 4a and the circumferential thin knife groove 3 are located in the central land portion 2a.

[0032] A second inclined groove 4b is formed in the central land portion 2a, extending from the central circumferential main hook 1a toward the outer side of the tire axial direction and bending toward one side of the tire rotation direction R. The second inclined groove 4b has substantially the same structure as the first inclined groove 4a. Therefore, unless otherwise specified, the structure of the first inclined groove 4a can be applied to the second inclined groove 4b. Figure 1 As shown, the first inclined grooves 4a and the second inclined grooves 4b are alternately arranged in the tire circumferential direction in the central land portion 2a, and the central land portion 2a is formed as a vine-shaped rib that is continuous in the tire circumferential direction in the tread portion.

[0033] The angle θ of the first inclined groove 4a relative to the tire circumferential direction 1As it gradually decreases toward the side of the circumferential fine knife 3, the first inclined groove 4a in front of the circumferential fine knife groove 3 is approximately parallel to the tire circumference. The first inclined groove 4a is close to the circumference at a position close to the circumferential fine knife groove 3 that continues to extend in an S-shaped manner, and the tire rolling resistance is lower during driving, which improves the drainage performance of the new tire, can effectively break the water film on the ground, and provide better wet grip performance. The circumferential fine knife groove 3 can reduce the impact noise between the pattern block and the road surface, improve driving comfort, and at the same time, it can also reduce the rigidity of the edge of the pattern groove, prevent local wear of the pattern block, and extend the service life of the tire; Angle θ 1 Preferably it is 28-75°.

[0034] like Figure 2 As shown, in a preferred embodiment, the width L1 of the first inclined groove 4a is 1.5-3mm, the depth H1 is 1.5-3mm, and the groove wall of the first inclined groove 4a is arranged perpendicular to the tire tread; the width of the circumferential fine knife groove is 1-2mm. Such first inclined groove and circumferential fine knife groove are more helpful in reducing rolling resistance during driving.

[0035] Considering the rolling resistance and high mileage requirements of the tire in the middle and late stages of use, the bottom of the first inclined groove 4a is inlaid with an inclined knife groove 5 in the same direction as the first inclined groove 4a, that is, the inclined knife groove 5 is arranged on the radial inner side of the first inclined groove 4a. The inclined knife groove 5 can maintain the rolling resistance and wet grip performance of the tire in the middle and late stages of use, and maintain the handling performance of the tire throughout its life; in order to drain water in the middle and late stages of the tire, the starting and ending ends of the inclined knife groove 5 are connected to the starting and ending ends of the first inclined groove 4a, so that there is no cavity between the two, and the drainage function of the tire in the middle and late stages remains unchanged. Figure 2 As shown, the preferred width L2 of the inclined knife groove 5 is 0.4-1 mm, and its depth H2 is 1.5 mm deeper than the depth H1 of the first inclined groove 4a. The bottom of the inclined knife groove 5 is a full arc structure, that is, the inclined knife groove 5 is cut at the bottom of the first inclined groove 4a.

[0036] The land portion is provided with an arc-shaped shallow groove 6 which extends obliquely from a circumferential main groove toward the outer side of the tire axial direction, the arc-shaped shallow groove 6 is interrupted near the center line of the land portion, the groove wall of the arc-shaped shallow groove 6 is perpendicular to the tire tread, and the bottom of the arc-shaped shallow groove 6 is inlaid with an arc-shaped knife groove 7 with the same inclination direction as the arc-shaped shallow groove 6; the arc-shaped shallow groove 6 and the arc-shaped knife groove 7 are preferably arranged in the shoulder land portion 2b, and the length of the arc-shaped shallow groove 6 and the arc-shaped knife groove 7 of this embodiment is 1 / 2-4 / 5 of the width of the land portion where they are located, and there is no cavity between the arc-shaped shallow groove 6 and the arc-shaped knife groove 7, thereby ensuring that the low rolling resistance performance and high drainage function of the tire remain unchanged in the middle and late stages.

[0037] like Figure 3As shown, the preferred width L3 of the arc-shaped shallow groove 6 is 1.5-2.5mm, and the depth H3 is 1.5-3mm; the preferred width L4 of the arc-shaped sipe is 0.4-1mm, and its depth H4 is 1.5mm deeper than the depth H3 of the arc-shaped shallow groove, that is, the arc-shaped sipe 7 is cut at the bottom of the arc-shaped line groove 6, and the bottom of the arc-shaped sipe 7 is a full arc structure. The arc-shaped shallow groove 6 in the shoulder land portion 2b can further improve the low rolling resistance and high drainage performance of the new tire, thereby improving the wet grip of the tire. The main purpose of the arc-shaped sipe 7 is to maintain the low rolling resistance and better wet grip performance of the tire in the middle and late stages of use, and maintain the handling performance of the tire throughout its life.

[0038] Each land portion is provided with a transverse fine knife groove 8 extending from the circumferential main groove to the tire axial direction. The preferred width of the transverse fine knife groove 8 is 0.4-0.8 mm, the length is 2-5 mm, and the depth of the transverse fine knife groove is 40-80% of the depth of the circumferential main groove. The transverse fine knife groove 8 can reduce the rigidity of the edge of the tread strip in the land portion, improve wear, and reduce deformed wear; more quickly break the water film of the tread contact surface, remove the moisture on the surface, improve the wet grip performance, and provide additional grip on snowy roads; at the same time, the transverse fine knife groove 8 can absorb the pumping noise generated when the tread groove contacts the ground during driving, making the ride more comfortable and more environmentally friendly. The spacing between adjacent transverse fine knife grooves 8 in the tire circumferential direction is 1 / 4-1 / 10 of the spacing between adjacent first inclined grooves 4a in the tire circumferential direction.

[0039] The first inclined grooves 4a and the arc-shaped shallow grooves 6 are arranged with a variety of pattern pitches, that is, respective pitches are arranged in the circumferential direction of the tire, and the width of each pitch is set according to a certain ratio. The first inclined grooves 4 and the arc-shaped shallow grooves 6 in this embodiment are alternately arranged in the circumferential direction of the tire, and respective pitches are arranged in the circumferential direction of the tire, which can effectively reduce the pitch noise caused by pitch resonance.

[0040] The long-distance truck tire of the present application has been described above by way of example, but the present application is not limited to the above-mentioned specific embodiments and can be implemented in various modified embodiments.

[0041] Tire Test Example

[0042] Based on the specifications in Table 1, a prototype with Figure 1 The basic tread pattern shown is a 315 / 70R22.5 specification all-steel radial high mileage long-haul truck tire with Figure 5 The tires with the pattern shown in the figure were tested for various properties of the tires. The test method is as follows. The test results are shown in Table 1.

[0043] Table 1 Performance test of long-distance truck tires

[0044]

[0045] The data in Table 1 show that Figure 5 The tire with the tread pattern shown has poor rolling resistance, noise and wet performance. Figure 5 For the automobile tire with the tire pattern shown, the rolling resistance of the long-distance truck tire provided by the present application is reduced by 33%, and the rolling resistance reaches Class A.

[0046] According to existing experience, every 20-30% reduction in rolling resistance can save 6%-8% of fuel consumption. Under normal circumstances, a truck consumes about 30L of fuel per 100 kilometers. Based on this calculation, 30*8% = 2.4L of fuel can be saved per 100 kilometers. Based on 100,000 kilometers per year, each truck can save 2,400L of fuel per year, reducing CO 2 Emissions are 6.4 tons. Based on a fleet of 200 trucks, this can save 480,000L of fuel per year and reduce CO 2 Emissions: 1,280 tons.

[0047] The noise level reaches A-level, 71dB, which is 2-3dB lower than that of ordinary B-level products, which is equivalent to half the noise caused by the tire excitation of a vehicle passing by that a person on the roadside hears.

[0048] The wet test performance reached B level, and the snow performance reached 1.81, which is much higher than the winter tire limit of 1.25, indicating that the safety performance of the product described in this application has reached the first-class level on various road surfaces. The European label grade of the tire product provided in this application reaches ABA and passes the snow test.

Claims

1. An all-steel radial high-mileage long-distance truck tire, comprising a tread portion, wherein the tread portion is provided with a plurality of circumferential main grooves extending continuously along the circumference of the tire, wherein the circumferential main grooves divide the tread portion into a plurality of land portions, wherein: A circumferential fine knife groove and a first inclined groove are formed in the land portion, the circumferential fine knife groove is located on the center line of the land portion and extends continuously in an S-shape along the circumference of the tire, the width of the circumferential fine knife groove is 1-2mm; the first inclined groove extends from a circumferential main groove toward the inner side of the tire axial direction and bends toward one side of the tire rotation direction, the first inclined groove is interrupted near the circumferential fine knife groove: the angle θ1 of the first inclined groove relative to the tire circumference gradually decreases toward the side of the circumferential fine knife groove, and the first inclined groove near the circumferential fine knife groove is approximately parallel to the tire circumference; the angle θ1 is 28-75°.

2. The all-steel radial high mileage long-distance truck tire according to claim 1, characterized in that: The land portion has a second inclined groove extending axially outward from a circumferential main groove of the tire and bending toward one side of the tire rotation direction. The first inclined groove and the second inclined groove are alternately arranged along the circumference of the tire in the land portion. The land portion is formed as a vine-shaped rib continuous along the circumference of the tire in the tread portion.

3. The all-steel radial high mileage long-distance truck tire according to claim 1, characterized in that: The first inclined groove has a width of 1.5-3 mm and a depth of 1.5-3 mm. The groove wall of the first inclined groove is perpendicular to the tire tread. The first inclined groove and the circumferential thin sipe are located in the central land portion.

4. The all-steel radial high mileage long-distance truck tire according to claim 1, characterized in that: An inclined knife groove having the same inclination direction as the first inclined groove is embedded at the bottom of the first inclined groove; the starting end and the ending end of the inclined knife groove are connected to the starting end and the ending end of the first inclined groove.

5. The all-steel radial high mileage long-haul truck tire according to claim 4, characterized in that: The width of the inclined knife groove is 0.4-1 mm, and its depth is 1.5 mm deeper than the depth of the first inclined groove; the bottom of the inclined knife groove is a full arc structure.

6. The all-steel radial high mileage long-haul truck tire according to claim 1, characterized in that: The land portion is provided with an arc-shaped shallow groove extending obliquely from a circumferential main groove toward the outer side of the tire axial direction, and the depth of the arc-shaped shallow groove is 1.5-3mm; the arc-shaped shallow groove is interrupted near the center line of the land portion, the groove wall of the arc-shaped shallow groove is perpendicular to the tire tread, and the bottom of the arc-shaped shallow groove is inlaid with an arc-shaped knife groove with the same inclination direction as the arc-shaped shallow groove.

7. The all-steel radial high mileage long-haul truck tire according to claim 6, characterized in that: The lengths of the arc-shaped shallow groove and the arc-shaped knife groove are 1 / 2-4 / 5 of the width of the land portion where they are located, the width of the arc-shaped shallow groove is 1.5-2.5 mm, the width of the arc-shaped knife groove is 0.4-1 mm, and its depth is 1.5 mm deeper than the depth of the arc-shaped shallow groove; the bottom of the arc-shaped knife groove is a full arc structure.

8. The all-steel radial high mileage long-haul truck tire according to claim 1, characterized in that: A transverse fine knife groove is provided in the land portion and extends axially from the circumferential main groove to the tire. The width of the transverse fine knife groove is 0.4-0.8mm, the length is 2-5mm, and the depth of the transverse fine knife groove is 40-80% of the depth of the circumferential main groove; the spacing between adjacent transverse fine knife grooves in the tire circumferential direction is 1 / 4-1 / 10 of the spacing between adjacent first inclined grooves in the tire circumferential direction.

9. The all-steel radial high mileage long-haul truck tire according to claim 1, characterized in that: The width of the circumferential main groove is 10-15 mm, and the groove wall of the circumferential main groove is inclined at an angle θ2 with the tire radial direction; the angle θ2 is 10-20°.

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