Tire

Abstract

The utility model provides a kind of tire, wherein, including: multiple circumferential grooves, interval setting on the outer circumferential surface of tire along the axial direction of tire and all along the circumferential direction of tire extends, to separate the outer circumferential surface of tire into multiple blocks;Circumferential groove includes two center grooves and two crown grooves;The width of center groove is W11, and the width of crown groove is W12, wherein, W11>W12;Multiple blocks include center block, two crown blocks and two shoulder blocks;The width of center block is W1, and the width of crown block is W2, wherein, W1>W2;The total length of crown arc of tire is TW, and the nominal section width of tire is SN;Wherein, 0.78≤TW / SN≤0.82, to solve the problem that the tire of city motion type multi-functional car in prior art is difficult to balance dry ground grip, wet ground handling and rolling resistance.

Description

Technical Field

[0001] This utility model relates to the field of tire technology, and more specifically, to a tire. Background Technology

[0002] With the development of the automotive industry, the urban SUV (sports utility vehicle) market continues to expand. Urban SUVs are often driven on paved urban roads and occasionally encounter complex road conditions, which places stringent requirements on tire performance.

[0003] However, existing urban SUV tires struggle to achieve an ideal balance in terms of dry grip, wet handling, and rolling resistance. Furthermore, current tires are also inadequate in meeting the high torque and heavy body characteristics of new energy SUVs. Utility Model Content

[0004] The main objective of this invention is to provide a tire that solves the problem of existing urban SUV tires having difficulty balancing dry grip, wet handling, and rolling resistance.

[0005] To achieve the above objectives, according to one aspect of the present invention, a tire is provided, comprising: a plurality of circumferential grooves, spaced apart along the axial direction of the tire on the outer circumferential surface of the tire and extending circumferentially to divide the outer circumferential surface of the tire into a plurality of tread blocks; the circumferential grooves include two central grooves and two crown grooves; the width of the central grooves is W11, and the width of the crown grooves is W12, wherein W11 > W12; the plurality of tread blocks include a central tread block, two crown tread blocks, and two shoulder tread blocks; the width of the central tread block is W1, and the width of the crown tread block is W2, wherein W1 > W2; the total length of the crown arc of the tire is TW, and the nominal section width of the tire is SN; wherein 0.78 ≤ TW / SN ≤ 0.82.

[0006] Furthermore, W1 = 0.133TW ± 0.005TW, W2 = 0.127TW ± 0.005TW; and / or, W11 = 0.055TW ± 0.003TW, W12 = 0.053TW ± 0.003TW.

[0007] Furthermore, the tire also includes multiple lateral groove groups, which are spaced apart along the circumference of the tire on its outer circumference surface to divide the tire's outer circumference surface into multiple pitches. Each lateral groove group includes multiple lateral groove modules, which are correspondingly arranged on multiple tread blocks. Each lateral groove module includes multiple lateral grooves spaced apart along the circumference of the tire. Each pair of adjacent pitches is designated as the first pitch and the second pitch, and the first pitch and the second pitch together form a pitch group. The tire includes multiple pitch groups with five widths PL, namely PA, PB, PC, PD, and PE. Among them, PA:PB:PC:PD:PE = 1:1.14±0.15:1.29±0.15:1.41±0.15:1.57±0.15.

[0008] Furthermore, the plurality of lateral groove modules include a first lateral groove module disposed on the center tread block. The first lateral groove module includes a first lateral groove, a second lateral groove, and a third lateral groove spaced apart along the circumference of the tire. The first lateral groove extends through the width direction of the center tread block. The first end of the second lateral groove extends to the first side of the center tread block, and the second end of the second lateral groove is spaced apart from the second side of the center tread block. The first end of the third lateral groove is spaced apart from the first side of the center tread block, and the second end of the second lateral groove extends to the second side of the center tread block. The length L1 of the first lateral groove is greater than that of the second lateral groove. The length L2 and the length L3 of the third lateral groove; and / or, the first lateral groove, the second lateral groove and the third lateral groove each include a first groove body and a second groove body connected together, the depth h1 of the first groove body is less than the depth h2 of the second groove body, and the width L11 of the first groove body is less than or equal to the width L12 of the second groove body; and / or, the first lateral groove, the second lateral groove and the third lateral groove each include a straight groove segment and an arc groove segment connected together, the straight groove segment is set at a first predetermined angle α with the center surface CL of the tire, and the arc groove segment is used to connect with one side of the center tread block; and / or, a first chamfer is provided on one side of the width direction of the first lateral groove.

[0009] Further, in the first transverse groove, L11 < L12 and L11 = 1 / 4L1; and / or, in the second and third transverse grooves, L2 = L3 and L11 = L12 = 1 / 2L2; and / or, the distance between the second end of the second transverse groove and the center plane CL is l3, and the distance between the first end of the third transverse groove and the center plane CL is l3; the distance between the second end of the second transverse groove and the second side of the center pattern block is l4, and the distance between the first end of the third transverse groove and the first side of the center pattern block is l4. The distance is l4; where l4 = 0.306W1 ± 0.003W1, l3 = l4 - 1.5 mm; and / or, α = 112 ± 4°; and / or, h1 = 0.5h2; and / or, the depth of the first chamfer is h11; where 1 mm ≤ h11 ≤ 1.5 mm; and / or, the distance between any two adjacent transverse grooves in the first transverse groove, the second transverse groove, and the third transverse groove is l5; where the ratio between l5 and the width PL of the corresponding pitch group is l5 / PL = 1 / 4.

[0010] Furthermore, the plurality of lateral groove modules include a second lateral groove module disposed on the crown tread block. The second lateral groove module includes a fourth, a fifth, and a sixth lateral groove spaced apart along the circumference of the tire. The fourth and fifth lateral grooves are both disposed through the width direction of the crown tread block. The first end of the sixth lateral groove extends to the first side of the crown tread block, and the second end of the sixth lateral groove is spaced apart from the second side of the crown tread block. The length L4 of the fourth lateral groove is greater than the length L5 of the fifth lateral groove, and the length L5 of the fifth lateral groove is greater than the length L6 of the sixth lateral groove. And / or, the fourth lateral groove... The groove, the fifth lateral groove, and the sixth lateral groove all include a third groove and a fourth groove connected to each other. The depth h3 of the third groove is less than the depth h4 of the fourth groove, and the width L13 of the third groove is less than or equal to the width L14 of the fourth groove. And / or, the extension trajectories of the fourth lateral groove, the fifth lateral groove, and the sixth lateral groove are all arc-shaped. The line connecting the two ends of the fifth lateral groove is set at a second predetermined angle β with the center plane CL of the tire, and the line connecting the two ends of the sixth lateral groove is set at a third predetermined angle γ with the center plane CL. And / or, a second chamfer is provided on one side of the width direction of the fourth lateral groove and the fifth lateral groove.

[0011] Further, in the fourth transverse groove, L13 < L14 and L13 = 0.25L4; and / or, in the fifth transverse groove, L13 < L14 and L13 = 0.25L5; and / or, in the sixth transverse groove, L13 = L14 = 0.5L6 and / or, γ = 65° ± 3°; and / or, β = 60° ± 3°; and / or, h3 = h4; and / or, the depth of the second chamfer is h12; wherein, 1mm ≤ h12 ≤ 1.5mm; and / or, the distance between the second end of the sixth transverse groove and the second side of the crown pattern block is l2; wherein, l 2 = 0.5W2-1mm; and / or, the distance between the ends of any two adjacent transverse grooves in the fourth, fifth, and sixth transverse grooves that are away from the center plane CL is l6, wherein the ratio between l6 and the width PL of the corresponding pitch group is l6 / PL = 1 / 6; and / or, the distance between the end of the fourth transverse groove near the center plane CL and the end of any one of the two adjacent fifth transverse grooves near the center plane CL is l7, wherein the ratio between l7 and the width PL of the corresponding pitch group is l7 / PL = 0.25.

[0012] Furthermore, the plurality of lateral groove modules include a third lateral groove module disposed on the shoulder tread block. The third lateral groove module includes a seventh lateral groove and two eighth lateral grooves spaced apart along the circumference of the tire. The first end of the seventh lateral groove extends to the first side of the shoulder tread block, and the second end of the seventh lateral groove is spaced apart from the second side of the shoulder tread block. The first end of the eighth lateral groove is spaced apart from the first side of the shoulder tread block, and the second end of the eighth lateral groove extends to the second side of the shoulder tread block. The length L7 of the seventh lateral groove is equal to the length L8 of the eighth lateral groove, and the width w7 of the seventh lateral groove is greater than that of the eighth lateral groove. The width of the lateral groove is w8; and / or, the extension trajectories of the seventh and eighth lateral grooves are both arc-shaped, and the line connecting the intersection of the seventh lateral groove and the side line of the total length of the tire crown arc and the second end of the seventh lateral groove is set at a fourth predetermined angle δ2 with the center plane CL of the tire; the line connecting the intersection of the eighth lateral groove and the side line of the total length of the tire crown arc and the second end of the eighth lateral groove is set at a fifth predetermined angle δ1 with the center plane CL of the tire; and / or, a third chamfer is provided on both opposite sides of the width direction of the seventh lateral groove; and / or, a fourth chamfer is provided on one side of the width direction of the eighth lateral groove.

[0013] Further, δ1 = 81 ± 2°; and / or, δ2 = 83 ± 2°; and / or, δ1 - δ2 = 2°; and / or, the depth of the third chamfer is h13; where 1 mm ≤ h13 ≤ 1.5 mm; and / or, the depth of the fourth chamfer is h14; where 1 mm ≤ h14 ≤ 1.5 mm; and / or, the distance between the second end of the seventh transverse groove and the second side of the shoulder pattern block is l1; where l1 = 7 mm ± 2 mm.

[0014] Furthermore, the circumferential groove has rounded chamfers on both sides, with a radius of R1; where R1 = 1 mm to 2 mm; and / or, the width of the circumferential groove gradually increases along the direction close to the outer circumferential surface of the tire, and each side of the circumferential groove is set at a sixth predetermined angle ε with the center surface CL of the tire; where 5° ≤ ε ≤ 15°.

[0015] Applying the technical solution of this utility model, the tire of this utility model includes: multiple circumferential grooves, which are spaced apart along the axial direction of the tire on the outer circumferential surface of the tire and all extend along the circumferential direction of the tire to divide the outer circumferential surface of the tire into multiple tread blocks; the circumferential grooves include two central grooves and two crown grooves; the width of the central grooves is W11, and the width of the crown grooves is W12, wherein W11 > W12; the multiple tread blocks include a central tread block, two crown tread blocks, and two shoulder tread blocks; the width of the central tread block is W1, and the width of the crown tread block is W2, wherein W1 > W2; the total length of the crown arc of the tire is TW, and the nominal section width of the tire is SN; wherein 0.78 ≤ TW / SN ≤ 0.82. This invention not only improves tire drainage efficiency by setting the width of the center groove to be greater than the width of the crown groove (W11 > W12), especially on wet and slippery roads, enabling faster breaking of the water film between the tread and the ground, thus enhancing wet handling and braking performance, but also increases the contact area between the tire and the ground by setting the width of the center tread block to be greater than the width of the crown tread block (W1 > W2). This provides stronger grip and braking effect under dry conditions, improving driving safety and handling. Furthermore, by controlling the ratio of the total crown arc length TW to the nominal section width SN (0.78 ≤ TW / SN ≤ 0.82), the stability and fit of the tire under various road conditions are ensured, thereby optimizing rolling resistance, reducing energy consumption, and improving vehicle comfort and quietness. In this way, it solves the problem of existing urban SUV tires struggling to balance dry grip, wet handling, and rolling resistance, providing structural support for stable driving in complex road conditions. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of an embodiment of the tire according to the present invention is shown with some parts of the structure marked.

[0018] Figure 2 It shows Figure 1 The diagram shows a tire with another part of its structure marked.

[0019] Figure 3 It shows Figure 1 A schematic cross-sectional view of the first transverse groove along its own extension direction.

[0020] Figure 4 It shows Figure 1 A schematic cross-sectional view of the second or third transverse groove along its own extension direction.

[0021] Figure 5 It shows Figure 1 A cross-sectional view of the fourth or fifth transverse groove along its own extension direction.

[0022] Figure 6 It shows Figure 1 A schematic cross-sectional view of the sixth transverse groove along its own extension direction.

[0023] Figure 7 It shows Figure 1 A cross-sectional schematic diagram of the first, fourth, fifth, or eighth transverse groove shown.

[0024] Figure 8 It shows Figure 1 A cross-sectional schematic diagram of the seventh transverse groove shown;

[0025] Figure 9 A cross-sectional schematic diagram of the circumferential groove of this utility model is shown;

[0026] Figure 10 It shows Figure 1 A magnified view of a portion of the tire shown.

[0027] The above figures include the following reference numerals:

[0028] 1. Circumferential groove; 11. Central groove; 12. Crown groove; 2. Pattern block; 21. Central pattern block; 22. Crown pattern block; 23. Shoulder pattern block; 3. Transverse groove group; 4. Transverse groove module; 41. First transverse groove module; 42. Second transverse groove module; 43. Third transverse groove module; 5. Transverse groove; 51. First transverse groove; 52. Second transverse groove; 53. Third transverse groove 54. Fourth transverse groove; 55. Fifth transverse groove; 56. Sixth transverse groove; 57. Seventh transverse groove; 58. Eighth transverse groove; 61. First groove body; 62. Second groove body; 63. Third groove body; 64. Fourth groove body; 71. Straight groove segment; 72. Curved groove segment; 81. First chamfer; 82. Second chamfer; 83. Third chamfer; 84. Fourth chamfer; 9. Pitch; 91. Pitch group. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figures 1 to 10 As shown, this utility model provides a tire, including: multiple circumferential grooves 1, which are spaced apart along the axial direction of the tire on the outer circumferential surface of the tire and extend along the circumferential direction of the tire to divide the outer circumferential surface of the tire into multiple tread blocks 2; the circumferential grooves 1 include two central grooves 11 and two crown grooves 12; the width of the central grooves 11 is W11, and the width of the crown grooves 12 is W12, wherein W11 > W12; the multiple tread blocks 2 include a central tread block 21, two crown tread blocks 22, and two shoulder tread blocks 23; the width of the central tread block 21 is W1, and the width of the crown tread block 22 is W2, wherein W1 > W2; the total length of the crown arc of the tire is TW, and the nominal section width of the tire is SN; wherein 0.78 ≤ TW / SN ≤ 0.82.

[0031] This invention not only improves tire drainage efficiency by setting the width of the central groove 11 to be greater than the width of the crown groove 12 (W11 > W12), especially on wet and slippery roads, but also enhances wet handling and braking performance by setting the width of the central tread block 21 to be greater than the width of the crown tread block 22 (W1 > W2). This increases the contact area between the tire and the ground, providing stronger grip and braking effect on dry roads, thus improving driving safety and handling. Furthermore, by controlling the ratio of the total crown arc length TW to the nominal section width SN (0.78 ≤ TW / SN ≤ 0.82), the stability and fit of the tire under various road conditions are ensured, thereby optimizing the rolling resistance, reducing energy consumption, and improving vehicle comfort and quietness. This solves the problem of existing urban SUV tires struggling to balance dry grip, wet handling, and rolling resistance, providing structural support for stable driving in complex road conditions.

[0032] exist Figure 1 and Figure 2 In the diagram, the inner side is the side of the tire closest to the center of the vehicle, and the outer side is the side of the tire furthest from the center of the vehicle.

[0033] like Figure 2 As shown, W1 = 0.133TW ± 0.005TW, W2 = 0.127TW ± 0.005TW; and / or, W11 = 0.055TW ± 0.003TW, W12 = 0.053TW ± 0.003TW.

[0034] These dimensional proportions ensure a more ideal balance between the elastic deformation and rigid support of the tread blocks when the tire tread is subjected to various loads. In practical applications, the width setting of the center tread block 21 helps maintain the tire's handling stability and braking performance under dry conditions, while the width of the crown tread block 22 ensures sufficient water drainage efficiency and lateral grip when dealing with wet conditions. This invention significantly improves the tire's overall performance in complex urban road conditions through precise control of the tread block width parameters, including better fuel economy, ride comfort, reduced cabin noise, and excellent handling and braking capabilities on both wet and dry roads.

[0035] like Figure 2As shown, the tire also includes multiple lateral groove groups 3, which are spaced apart along the circumference of the tire on its outer circumference surface to divide the tire's outer circumference surface into multiple pitches 9. Each lateral groove group 3 includes multiple lateral groove modules 4, which are correspondingly arranged on multiple tread blocks 2. Each lateral groove module 4 includes multiple lateral grooves 5 spaced apart along the circumference of the tire. Each pair of adjacent pitches 9 is a first pitch and a second pitch, and the first pitch and the second pitch together form a pitch group 91. The tire includes multiple pitch groups 91 with five widths PL, namely PA, PB, PC, PD, and PE. Among them, PA:PB:PC:PD:PE = 1:1.14±0.15:1.29±0.15:1.41±0.15:1.57±0.15.

[0036] This invention relates to a tire that achieves dynamic balance during rolling by incorporating multiple pitch groups 91 with five different widths. This not only improves fuel economy but also significantly enhances dry and wet handling performance by optimizing the tire's contact patch and pressure distribution, while simultaneously reducing rolling resistance and saving energy. Furthermore, by controlling the depth and width of the lateral grooves 5 and the distribution of the pitches 9, the tire exhibits superior overall performance, including but not limited to improved handling stability and braking safety on both wet and dry surfaces, as well as significant effects in noise reduction and comfort enhancement, fully meeting the high-performance requirements of urban SUVs in complex road conditions.

[0037] like Figure 2 and Figure 4As shown, the plurality of lateral groove modules 4 include a first lateral groove module 41 disposed on the central tread block 21. The first lateral groove module 41 includes a first lateral groove 51, a second lateral groove 52, and a third lateral groove 53 spaced apart along the circumference of the tire. The first lateral groove 51 extends through the width direction of the central tread block 21. The first end of the second lateral groove 52 extends to the first side of the central tread block 21, and the second end of the second lateral groove 52 is spaced apart from the second side of the central tread block 21. The first end of the third lateral groove 53 is spaced apart from the first side of the central tread block 21, and the second end of the second lateral groove 52 extends to the second side of the central tread block 21. The length L1 of the first lateral groove 51 is greater than the length L2 of the second lateral groove 52 and the length L3 of the third lateral groove 53. The length L3 of 3; and / or, the first lateral groove 51, the second lateral groove 52 and the third lateral groove 53 each include a first groove 61 and a second groove 62 connected together, the depth h1 of the first groove 61 is less than the depth h2 of the second groove 62, and the width L11 of the first groove 61 is less than or equal to the width L12 of the second groove 62; and / or, the first lateral groove 51, the second lateral groove 52 and the third lateral groove 53 each include a straight groove segment 71 and an arc groove segment 72 connected together, the straight groove segment 71 is set at a first predetermined angle α with the center surface CL of the tire, and the arc groove segment 72 is used to connect with one side of the center tread block 21; and / or, a first chamfer 81 is provided on one side of the width direction of the first lateral groove 51, the second lateral groove 52 and the third lateral groove 53.

[0038] Specifically, the first transverse groove 51 includes a first groove 61 and a second groove 62. The first groove 61 is used to connect to the side of the central patterned block 21. The second transverse groove 52 and the third transverse groove 53 each include a second groove 62 and two first grooves 61 located at their respective ends.

[0039] Specifically, the first side of the center tread block 21 is the side closest to the inner side of the tire, and the second side of the center tread block 21 is the side closest to the outer side of the tire.

[0040] The layout and characteristics of the multiple lateral groove modules 4 of the tire in this invention have been meticulously optimized. Particularly on the central tread block 21, the first lateral groove module 41 includes a first lateral groove 51, a second lateral groove 52, and a third lateral groove 53 of varying lengths, which are spaced apart along the circumference of the tire. The first lateral groove 51 extends through the width of the central tread block 21, and its length L1 is designed to be longer than the lengths L2 and L3 of the second and third lateral grooves 52 and 53, respectively. Furthermore, the depth and width of the lateral grooves exhibit a gradual change. The first groove 61 is connected to the second groove 62, with the former having a smaller depth h1 and width L11 than the latter. This helps to improve the balance between the rigidity of the tread block and drainage efficiency. Moreover, the groove design formed by the straight groove segment 71 and the curved groove segment 72 allows the curved groove segment 72 to intersect the tire's center plane CL at a first predetermined angle α, enhancing stability when in contact with the ground, especially on corners or wet / slippery surfaces. Finally, the first chamfer 81 is applied to one side of the width of the first lateral groove 51, the second lateral groove 52, and the third lateral groove 53, which helps to reduce stress concentration on the tread blocks and prevent crack propagation at the groove ends. This improves the tire's grip and handling stability under various road conditions, while reducing noise during driving, achieving a comprehensive improvement in tire performance.

[0041] like Figure 3 , Figure 7 and Figure 10 As shown, in the first transverse groove 51, L11 < L12 and L11 = 1 / 4L1; and / or, in the second transverse groove 52 and the third transverse groove 53, L2 = L3 and L11 = L12 = 1 / 2L2; and / or, the distance between the second end of the second transverse groove 52 and the center surface CL is l3, and the distance between the first end of the third transverse groove 53 and the center surface CL is l3; the distance between the second end of the second transverse groove 52 and the second side of the center pattern block 21 is l4, and the distance between the first end of the third transverse groove 53 and the first side of the center pattern block 21 is l4. The distance between them is l4; where l4 = 0.306W1 ± 0.003W1, l3 = l4 - 1.5 mm; and / or, α = 112 ± 4°; and / or, h1 = 0.5h2; and / or, the depth of the first chamfer 81 is h11; where 1 mm ≤ h11 ≤ 1.5 mm; and / or, the distance between any two adjacent transverse grooves 5 in the first transverse groove 51, the second transverse groove 52 and the third transverse groove 53 is l5; where the ratio between l5 and the width PL of the corresponding pitch group 91 is l5 / PL = 1 / 4.

[0042] This invention achieves a comprehensive improvement in tire performance through precise control of the width, depth, angle, and spacing of each groove. While ensuring handling performance on both wet and dry surfaces, it effectively reduces noise and enhances overall comfort. Through meticulous parameter design and optimization, the tire exhibits superior handling stability and safety in complex urban road conditions, both dry and wet, while reducing driving noise to provide a quieter driving environment and ensuring optimal tire performance under various operating conditions.

[0043] like Figure 1 and Figure 10 As shown, the plurality of lateral groove modules 4 include a second lateral groove module 42 disposed on the crown tread block 22. The second lateral groove module 42 includes a fourth lateral groove 54, a fifth lateral groove 55, and a sixth lateral groove 56 disposed at intervals along the circumference of the tire. The fourth lateral groove 54 and the fifth lateral groove 55 are both disposed through the width direction of the crown tread block 22. The first end of the sixth lateral groove 56 extends to the first side of the crown tread block 22, and the second end of the sixth lateral groove 56 is spaced apart from the second side of the crown tread block 22. The length L4 of the fourth lateral groove 54 is greater than the length L5 of the fifth lateral groove 55, and the length L5 of the fifth lateral groove 55 is greater than the length L6 of the sixth lateral groove 56. And / or, the fourth lateral groove... 54. Both the fifth lateral groove 55 and the sixth lateral groove 56 include a connected third groove 63 and a fourth groove 64. The depth h3 of the third groove 63 is less than the depth h4 of the fourth groove 64, and the width L13 of the third groove 63 is less than or equal to the width L14 of the fourth groove 64. And / or, the extension trajectories of the fourth lateral groove 54, the fifth lateral groove 55 and the sixth lateral groove 56 are all arc-shaped. The line connecting the two ends of the fifth lateral groove 55 is set at a second predetermined angle β with the center plane CL of the tire, and the line connecting the two ends of the sixth lateral groove 56 is set at a third predetermined angle γ with the center plane CL. And / or, a second chamfer 82 is provided on one side of the width direction of the fourth lateral groove 54 and the fifth lateral groove 55.

[0044] In this invention, the first side of each crown pattern block 22 is the side away from the center surface CL of the tire, and the second side of each crown pattern block 22 is the side close to the center surface CL of the tire.

[0045] Specifically, the fourth transverse groove 54 and the fifth transverse groove 55 each include a fourth groove body 64 and two third groove bodies 63 located at their respective ends; the sixth transverse groove 56 includes a third groove body 63 and a fourth groove body 64, the third groove body 63 being used to connect to the side of the crown pattern block 22.

[0046] In the tire of this invention, the arrangement of multiple lateral groove modules 4 further refines the structure of the crown tread block 22. By introducing the fourth lateral groove 54, the fifth lateral groove 55, and the sixth lateral groove 56, a multi-layered and multi-dimensional drainage and grip optimization system is formed. The fourth lateral groove 54 and the fifth lateral groove 55 extend across the entire width of the crown tread block 22, while the sixth lateral groove 56 only partially extends to both sides of the crown tread block 22. This effectively improves drainage efficiency in wet conditions and grip in dry conditions. Specifically, the length L4 of the fourth lateral groove 54 is greater than the length L5 of the fifth lateral groove 55, and the length L5 of the fifth lateral groove 55 is greater than the length L6 of the sixth lateral groove 56. This gradient distribution of lengths enables the tread block to more efficiently break through the water film during tire contact, improving wet handling. Simultaneously, due to the difference in groove lengths, the rigidity of the crown tread block 22 can be fine-tuned to optimize dry handling performance.

[0047] Furthermore, the difference in depth and width between the third groove 63 and the fourth groove 64 further optimizes the stability and wear resistance of the tread structure. The depth h3 of the third groove 63 is less than the depth h4 of the fourth groove 64, and its width L13 is also less than or equal to the width L14 of the fourth groove 64. This allows the tire to maintain a good ground pressure distribution under different road conditions, avoiding excessive wear of the tread blocks and improving the overall durability of the tire. The arc-shaped extension trajectory of the fifth lateral groove 55 and the sixth lateral groove 56, combined with the second predetermined angle β and the third predetermined angle γ between them and the tire center plane CL, not only strengthens the structural rigidity of the tread blocks but also optimizes the tire's contact pattern with the ground. This allows the tire to make more stable contact with the ground at high speeds, reducing unnecessary tire deformation and thus improving driving stability and comfort. The second chamfer 82 set on one side of the width direction of the fourth lateral groove 54 and the fifth lateral groove 55 reduces stress concentration at the groove edge by changing the groove edge shape, preventing damage to the tread blocks under heavy loads and improving tire lifespan. This achieves a balanced improvement in driving performance on both wet and dry surfaces, while reducing tire noise during driving, providing drivers with a safer, more comfortable, and more efficient driving experience.

[0048] like Figure 5 , Figure 8 and Figure 10As shown, in the fourth transverse groove 54, L13 < L14 and L13 = 0.25L4; and / or, in the fifth transverse groove 55, L13 < L14 and L13 = 0.25L5; and / or, in the sixth transverse groove 56, L13 = L14 = 0.5L6 and / or, γ = 65° ± 3°; and / or, β = 60° ± 3°; and / or, h3 = h4; and / or, the depth of the second chamfer 82 is h12; wherein, 1mm ≤ h12 ≤ 1.5mm; and / or, the distance between the second end of the sixth transverse groove 56 and the second side of the crown pattern block 22 is l2; wherein, l2 = 0.5W2-1mm; and / or, the distance between the ends of any two adjacent transverse grooves 5 of the fourth transverse groove 54, the fifth transverse groove 55 and the sixth transverse groove 56 away from the center plane CL is l6, wherein the ratio between l6 and the width PL of the corresponding pitch group 91 is l6 / PL=1 / 6; and / or, the distance between the end of the fourth transverse groove 54 near the center plane CL and the end of any one of the two adjacent fifth transverse grooves 55 near the center plane CL is l7, wherein the ratio between l7 and the width PL of the corresponding pitch group 91 is l7 / PL=0.25.

[0049] In the tire of this invention, the specific numerical settings of L13 and L14 in the fourth lateral groove 54, the fifth lateral groove 55, and the sixth lateral groove 56 reflect the precise control of the groove geometry to optimize tire performance. In the fourth lateral groove 54 and the fifth lateral groove 55, L13 < L14 and L13 = 0.25 times L4 or L5. This facilitates the formation of a small water storage space at the end of the groove, improving drainage efficiency under wet conditions, while maintaining sufficient rigidity of the tread blocks, ensuring stable handling performance of the vehicle on slippery roads. For the sixth lateral groove 56, setting L13 = L14 = 0.5L6 balances the drainage of the groove and the support of the tread blocks, maintaining the tire's overall performance under various road conditions. Setting groove angles of γ=65°±3° and β=60°±3° to match the contact angle between the tread block and the road surface enhances tire grip during cornering and promotes rapid water rupture, improving safety in wet conditions. The equal depths of h3 and h4 ensure uniform groove wear, maintaining long-term performance stability. Introducing a second chamfer 82 with a depth h12 between 1mm and 1.5mm further enhances the edge rigidity of the tread block, reducing the risk of slippage on wet surfaces. The distance l2 between the second end of the sixth lateral groove 56 and the second side of the crown tread block 22 is determined to be 0.5W2-1mm, optimizing the stress distribution of the crown tread block 22 and improving the tire's structural durability. The ratio of the distance l6 between the ends of adjacent fourth lateral grooves 54 and fifth lateral grooves 55 furthest from the centerline CL to the width PL of the corresponding pitch group 91 is 1 / 6, and the ratio of the interval l7 between the ends of fourth lateral grooves 54 and fifth lateral grooves 55 closest to the centerline CL to PL is 0.25. This makes the force distribution of the tire more uniform during rolling, while reducing the noise generated by the tire contacting the ground, thus enhancing the comfort and quietness of the vehicle. In this way, the tire of this invention achieves lower rolling resistance and better durability while maintaining good handling, providing users with a safe and reliable driving experience.

[0050] like Figure 1 , Figure 9 and Figure 10As shown, the plurality of lateral groove modules 4 include a third lateral groove module 43 disposed on the shoulder tread block 23. The third lateral groove module 43 includes a seventh lateral groove 57 and two eighth lateral grooves 58 spaced apart along the circumference of the tire. The first end of the seventh lateral groove 57 extends to the first side of the shoulder tread block 23, and the second end of the seventh lateral groove 57 is spaced apart from the second side of the shoulder tread block 23. The first end of the eighth lateral groove 58 is spaced apart from the first side of the shoulder tread block 23, and the second end of the eighth lateral groove 58 extends to the second side of the shoulder tread block 23. The length L7 of the seventh lateral groove 57 is equal to the length L8 of the eighth lateral groove 58, and the width w of the seventh lateral groove 57 is... 7 is greater than the width w8 of the eighth lateral groove 58; and / or, the extension trajectories of the seventh lateral groove 57 and the eighth lateral groove 58 are both arc-shaped, and the line connecting the intersection of the seventh lateral groove 57 and the side line of the total length of the crown arc of the tire and the second end of the seventh lateral groove 57 is set at a fourth predetermined angle δ2 with the center plane CL of the tire; the line connecting the intersection of the eighth lateral groove 58 and the side line of the total length of the crown arc of the tire and the second end of the eighth lateral groove 58 is set at a fifth predetermined angle δ1 with the center plane CL of the tire; and / or, a third chamfer 83 is provided on both opposite sides of the width direction of the seventh lateral groove 57; and / or, a fourth chamfer 84 is provided on one side of the width direction of the eighth lateral groove 58.

[0051] In this invention, the first side of each shoulder tread block 23 is the side away from the center surface CL of the tire, and the second side of each shoulder tread block 23 is the side close to the center surface CL of the tire.

[0052] In this invention, the length and width design of the seventh lateral groove 57 and the eighth lateral groove 58 optimizes drainage efficiency and tread block rigidity in different areas. Furthermore, the extension trajectories of both the seventh lateral groove 57 and the eighth lateral groove 58 are arc-shaped, forming a fourth predetermined angle δ2 and a fifth predetermined angle δ1 with the tire center plane CL, respectively. This helps guide water flow to the tire edge, reducing water film formation and thus improving wet grip performance. The seventh lateral groove 57 has a third chamfer 83 on each side, while the eighth lateral groove 58 has a fourth chamfer 84 on one side, enhancing the drainage capacity of the grooves and improving the overall strength of the tread blocks, ensuring tire handling stability and wear resistance under complex road conditions. This effectively improves the tire's overall performance, including better wet and dry braking, more stable dry and wet handling, and superior comfort and fuel economy, fully meeting the driving needs of urban SUVs on paved roads and in some complex road conditions.

[0053] like Figure 10As shown, δ1 = 81 ± 2°; and / or, δ2 = 83 ± 2°; and / or, δ1 - δ2 = 2°; and / or, the depth of the third chamfer 83 is h13; where 1 mm ≤ h13 ≤ 1.5 mm; and / or, the depth of the fourth chamfer 84 is h14; where 1 mm ≤ h14 ≤ 1.5 mm; and / or, the distance between the second end of the seventh transverse groove 57 and the second side of the shoulder pattern block 23 is l1; where l1 = 7 mm ± 2 mm.

[0054] In the tire of this invention, a precise 2° angle difference (δ1-δ2) is formed between the inclination angle δ1 of the eighth lateral groove 58 and the inclination angle δ2 of the seventh lateral groove 57. A third chamfer 83 is provided on both sides of the seventh lateral groove 57, and a fourth chamfer 84 is provided on one side of the eighth lateral groove 58. Simultaneously, the second end of the seventh lateral groove 57 maintains a distance l1 of 7±2mm from the second side of the shoulder tread block 23. Through the coordinated arrangement of these dimensions, effective dispersion of tread stress is achieved, preventing wear and deformation of the shoulder tread block due to stress concentration during high-speed cornering, thereby improving the tire's lateral force carrying capacity and dry cornering performance. Furthermore, the depth settings of the third chamfer 83 and the fourth chamfer 84 not only promote water flow guidance under wet conditions but also enhance tread rigidity, thus ensuring wet grip performance while optimizing handling stability and braking safety on slippery surfaces. The design of distance l1 ensures an appropriate gap between the groove and the edge of the tread block, avoiding excessive vibration of the groove during driving, reducing tire noise and improving comfort. Overall, this invention achieves a dual improvement in handling stability and comfort of high-performance tires under both dry and wet conditions through precise control of the groove angle, cutting angle depth, and the distance between the groove and the tread block 23 of the shoulder tread block.

[0055] like Figure 9 As shown, the circumferential groove 1 has rounded chamfers on both sides, with a radius of R1; where R1 = 1 mm to 2 mm; and / or, the width of the circumferential groove 1 gradually increases along the direction close to the outer circumferential surface of the tire, and each side of the circumferential groove 1 is set at a sixth predetermined angle ε with the center surface CL of the tire; where 5° ≤ ε ≤ 15°.

[0056] In this tire, the circumferential groove 1 has rounded chamfers on both sides, with a radius R1 set between 1mm and 2mm. Based on fluid dynamics principles, this effectively facilitates drainage, reduces the buoyancy interference of accumulated water on the tire tread, thereby reducing the risk of hydroplaning during wet driving and improving wet handling stability. Simultaneously, the width of the circumferential groove 1 gradually increases along the outer circumference of the tire. The sixth predetermined angle ε between the first groove sidewall of the circumferential groove 1 and the tire's center plane CL is ε1, and the sixth predetermined angle ε between the second groove sidewall of the circumferential groove 1 and the tire's center plane CL is ε2, both ε1 and ε2 being within the range of 5° to 15°. This width and angle setting disperses pressure at the groove edges, reduces stress concentration, and positively impacts tire wear resistance and lifespan. It also significantly reduces tire rolling resistance, lowers peak tire noise frequency, effectively reduces in-vehicle noise, and significantly improves driving comfort. Furthermore, the circumferential grooves 1 with their gradually widened and inclined design optimize the tire's grip, handling, and braking performance in both wet and dry conditions.

[0057] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0058] The tire of this utility model includes: multiple circumferential grooves 1, which are spaced apart along the axial direction of the tire on the outer circumferential surface of the tire and extend along the circumferential direction of the tire to divide the outer circumferential surface of the tire into multiple tread blocks 2; the circumferential grooves 1 include two central grooves 11 and two crown grooves 12; the width of the central grooves 11 is W11, the width of the crown grooves 12 is W12, wherein W11 > W12; the multiple tread blocks 2 include a central tread block 21, two crown tread blocks 22 and two shoulder tread blocks 23; the width of the central tread block 21 is W1, the width of the crown tread block 22 is W2, wherein W1 > W2; the total length of the crown arc of the tire is TW, and the nominal section width of the tire is SN; wherein 0.78 ≤ TW / SN ≤ 0.82. This invention not only improves tire drainage efficiency by setting the width of the central groove 11 to be greater than the width of the crown groove 12 (W11 > W12), especially on wet and slippery roads, but also enhances wet handling and braking performance by setting the width of the central tread block 21 to be greater than the width of the crown tread block 22 (W1 > W2). This increases the contact area between the tire and the ground, providing stronger grip and braking effect on dry roads, thus improving driving safety and handling. Furthermore, by controlling the ratio of the total crown arc length TW to the nominal section width SN (0.78 ≤ TW / SN ≤ 0.82), the stability and fit of the tire under various road conditions are ensured, thereby optimizing the rolling resistance, reducing energy consumption, and improving vehicle comfort and quietness. This solves the problem of existing urban SUV tires struggling to balance dry grip, wet handling, and rolling resistance, providing structural support for stable driving in complex road conditions.

[0059] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0060] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0061] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0062] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0063] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0064] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tire, characterized in that, include: Multiple circumferential grooves (1) are spaced along the axial direction of the tire on the outer circumferential surface of the tire and extend along the circumferential direction of the tire to divide the outer circumferential surface of the tire into multiple tread blocks (2). The circumferential groove (1) includes two central grooves (11) and two crown grooves (12); the width of the central groove (11) is W11, and the width of the crown groove (12) is W12, wherein W11 > W12; The plurality of pattern blocks (2) include a central pattern block (21), two crown pattern blocks (22) and two shoulder pattern blocks (23); the width of the central pattern block (21) is W1, and the width of the crown pattern block (22) is W2, wherein W1 > W2; The total length of the crown arc of the tire is TW, and the nominal section width of the tire is SN; wherein, 0.78≤TW / SN≤0.

82.

2. The tire according to claim 1, characterized in that, W1 = 0.133TW ± 0.005TW, W2 = 0.127TW ± 0.005TW; and / or, W11=0.055TW±0.003TW, W12=0.053TW±0.003TW.

3. The tire according to claim 1, characterized in that, The tire also includes a plurality of lateral groove groups (3), which are spaced apart along the circumference of the tire on the outer circumferential surface of the tire to divide the outer circumferential surface of the tire into a plurality of pitches (9). Each of the lateral groove groups (3) includes multiple lateral groove modules (4), and the multiple lateral groove modules (4) are arranged one-to-one on the multiple tread blocks (2). Each of the lateral groove modules (4) includes multiple lateral grooves (5) arranged at intervals along the circumference of the tire. In the plurality of pitches (9), each two adjacent pitches (9) are respectively the first pitch and the second pitch, and the first pitch and the second pitch together form a pitch group (91). The tire includes a plurality of pitch groups (91) with five widths PL, namely PA, PB, PC, PD and PE. in, PA:PB:PC:PD:PE=1:1.14±0.15:1.29±0.15:1.41±0.15:1.57±0.

15.

4. The tire according to claim 3, characterized in that, The plurality of lateral groove modules (4) includes a first lateral groove module (41) disposed on the central tread block (21). The first lateral groove module (41) includes a first lateral groove (51), a second lateral groove (52), and a third lateral groove (53) disposed at intervals along the circumference of the tire. The first lateral groove (51) is disposed through the width direction of the central tread block (21). The first end of the second lateral groove (52) extends to the first side of the central tread block (21), and the second end of the second lateral groove (52) is spaced apart from the second side of the central tread block (21). The first end of the third lateral groove (53) is spaced apart from the first side of the central tread block (21), and the second end of the second lateral groove (52) extends to the second side of the central tread block (21). The length L1 of the first transverse groove (51) is greater than the length L2 of the second transverse groove (52) and the length L3 of the third transverse groove (53); and / or, The first transverse groove (51), the second transverse groove (52), and the third transverse groove (53) each include a first groove body (61) and a second groove body (62) connected to each other. The depth h1 of the first groove body (61) is less than the depth h2 of the second groove body (62), and the width L11 of the first groove body (61) is less than or equal to the width L12 of the second groove body (62); and / or, The first lateral groove (51), the second lateral groove (52), and the third lateral groove (53) each include a connected straight groove segment (71) and an arc groove segment (72). The straight groove segment (71) is set at a first predetermined angle α with the center surface CL of the tire, and the arc groove segment (72) is used to connect to one side of the center tread block (21); and / or, A first chamfer (81) is provided on one side of the width direction of the first transverse groove (51).

5. The tire according to claim 4, characterized in that, In the first transverse groove (51), L11 < L12 and L11 = 1 / 4L1; and / or, In the second transverse groove (52) and the third transverse groove (53), L2=L3 and L11=L12=1 / 2L2 and / or, The distance between the second end of the second transverse groove (52) and the center surface CL is l3, and the distance between the first end of the third transverse groove (53) and the center surface CL is l3; the distance between the second end of the second transverse groove (52) and the second side of the center pattern block (21) is l4, and the distance between the first end of the third transverse groove (53) and the first side of the center pattern block (21) is l4; wherein, l4 = 0.306W1 ± 0.003W1, l3 = l4 - 1.5 mm; and / or, α = 112 ± 4°; and / or, h1 = 0.5h2; and / or, The depth of the first chamfer (81) is h11; where 1mm ≤ h11 ≤ 1.5mm; and / or, The distance between any two adjacent transverse grooves (5) in the first transverse groove (51), the second transverse groove (52) and the third transverse groove (53) is l5; wherein, the ratio between l5 and the width PL of the corresponding pitch group (91) is l5 / PL=1 / 4.

6. The tire according to claim 3, characterized in that, The plurality of lateral groove modules (4) includes a second lateral groove module (42) disposed on the crown tread block (22). The second lateral groove module (42) includes a fourth lateral groove (54), a fifth lateral groove (55), and a sixth lateral groove (56) disposed at intervals along the circumference of the tire. The fourth lateral groove (54) and the fifth lateral groove (55) are both disposed through the width direction of the crown tread block (22). The first end of the sixth lateral groove (56) extends to the first side of the crown tread block (22), and the second end of the sixth lateral groove (56) is spaced apart from the second side of the crown tread block (22). The length L4 of the fourth transverse groove (54) is greater than the length L5 of the fifth transverse groove (55), and the length L5 of the fifth transverse groove (55) is greater than the length L6 of the sixth transverse groove (56); and / or, The fourth transverse groove (54), the fifth transverse groove (55), and the sixth transverse groove (56) each include a connected third groove (63) and a fourth groove (64). The depth h3 of the third groove (63) is less than the depth h4 of the fourth groove (64), and the width L13 of the third groove (63) is less than or equal to the width L14 of the fourth groove (64); and / or, The extension trajectories of the fourth lateral groove (54), the fifth lateral groove (55), and the sixth lateral groove (56) are all arc-shaped. The line connecting the two ends of the fifth lateral groove (55) forms a second predetermined angle β with the center plane CL of the tire, and the line connecting the two ends of the sixth lateral groove (56) forms a third predetermined angle γ with the center plane CL; and / or, The fourth transverse groove (54) and the fifth transverse groove (55) are each provided with a second chamfer (82) on one side in the width direction.

7. The tire according to claim 6, characterized in that, In the fourth transverse groove (54), L13 < L14 and L13 = 0.25L4; and / or, In the fifth transverse groove (55), L13 < L14 and L13 = 0.25L5; and / or, In the sixth transverse groove (56), L13 = L14 = 0.5L6 and / or, γ = 65° ± 3°; and / or, β = 60° ± 3°; and / or, h3=h4; and / or, The depth of the second chamfer (82) is h12; where 1mm ≤ h12 ≤ 1.5mm; and / or, The distance between the second end of the sixth transverse groove (56) and the second side of the crown pattern block (22) is l2; where l2 = 0.5W2 - 1 mm; and / or, The distance between the ends of any two adjacent transverse grooves (5) of the fourth transverse groove (54), the fifth transverse groove (55), and the sixth transverse groove (56) away from the center plane CL is l6, wherein the ratio between l6 and the width PL of the corresponding pitch group (91) is l6 / PL = 1 / 6; and / or, The distance between the end of the fourth transverse groove (54) near the center surface CL and the end of any one of the two adjacent fifth transverse grooves (55) near the center surface CL is l7, wherein the ratio between l7 and the width PL of the corresponding pitch group (91) is l7 / PL=0.

25.

8. The tire according to claim 3, characterized in that, The plurality of lateral groove modules (4) includes a third lateral groove module (43) disposed on the shoulder tread block (23), the third lateral groove module (43) including a seventh lateral groove (57) and two eighth lateral grooves (58) spaced apart along the circumference of the tire; the first end of the seventh lateral groove (57) extends to the first side of the shoulder tread block (23), and the second end of the seventh lateral groove (57) is spaced apart from the second side of the shoulder tread block (23); the first end of the eighth lateral groove (58) is spaced apart from the first side of the shoulder tread block (23), and the second end of the eighth lateral groove (58) extends to the second side of the shoulder tread block (23); wherein, The length L7 of the seventh transverse groove (57) is equal to the length L8 of the eighth transverse groove (58), and the width w7 of the seventh transverse groove (57) is greater than the width w8 of the eighth transverse groove (58); and / or, The extension trajectories of the seventh lateral groove (57) and the eighth lateral groove (58) are both arc-shaped. The line connecting the intersection of the seventh lateral groove (57) and the side line of the total crown arc of the tire, and the second end of the seventh lateral groove (57), forms a fourth predetermined angle δ2 with the center plane CL of the tire; the line connecting the intersection of the eighth lateral groove (58) and the side line of the total crown arc of the tire, and the second end of the eighth lateral groove (58), forms a fifth predetermined angle δ1 with the center plane CL of the tire; and / or, The seventh transverse groove (57) has a third chamfer (83) on each of its opposite sides in the width direction; and / or, The eighth transverse groove (58) has a fourth chamfer (84) on one side in the width direction.

9. The tire according to claim 8, characterized in that, δ1 = 81 ± 2°; and / or, δ2 = 83 ± 2°; and / or, δ1-δ2=2°; and / or, The depth of the third chamfer (83) is h13; wherein 1mm ≤ h13 ≤ 1.5mm; and / or, The depth of the fourth chamfer (84) is h14; wherein 1mm ≤ h14 ≤ 1.5mm; and / or, The distance between the second end of the seventh transverse groove (57) and the second side of the shoulder pattern block (23) is l1; where l1 = 7mm ± 2mm.

10. The tire according to claim 1, characterized in that, Both sides of the circumferential groove (1) are provided with rounded chamfers, the radius of which is R1; wherein, R1 = 1mm to 2mm; and / or, The width of the circumferential groove (1) gradually increases along the direction close to the outer circumferential surface of the tire, and each side of the circumferential groove (1) is set at a sixth predetermined angle ε with the center surface CL of the tire; wherein, 5°≤ε≤15°.

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