Tire

Abstract

The utility model provides a tire, and a pattern structure on the tread of the tire comprises a plurality of circumferential grooves which divide the pattern structure into a plurality of pattern groups including a middle pattern group and two shoulder pattern groups; each pattern group is uniformly divided into a plurality of pattern blocks by the plurality of transverse grooves, each pattern block of the shoulder pattern group comprises an upper unit and a lower unit, and the plurality of pattern blocks of the shoulder pattern group are divided into a plurality of pattern parts comprising a first pattern block, a second pattern block, a third pattern block and a fourth pattern block; the lower unit of the second pattern block is of a mirror symmetry structure, and the symmetry plane A of the second pattern block passes through the rotating axis of the tire and is perpendicular to the tread; the lower units of the first pattern blocks and the third pattern blocks are in mirror symmetry about the symmetry plane A, and the shapes of the fourth pattern blocks are different from those of the lower units of the first pattern blocks, the second pattern blocks and the third pattern blocks, so that the problem that perfect balance between off-road performance and road performance of an RT tire in the prior art cannot be realized is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tires, in particular to a tire. Background Art

[0002] As tire manufacturers gain a deeper insight into consumer needs, people expect to have a tire that combines excellent off-road performance, road traction and ride comfort. In recent years, an innovative tire category has emerged in some large tire markets - RT tires (Rugged Terrain Tires), which perfectly combine all-terrain tires (All-Terrain) and mud tires (Mud Terrain). n )’s superior performance.

[0003] RT tires are designed for rough terrains, including loose soil, rocky terrain and extremely uneven roads, which are difficult for traditional all-terrain tires to adapt to. The tread design of RT tires is similar to that of mud-terrain tires (MT) to some extent. Its staggered tread pattern groups, high void ratio of sea to land and extension of the sidewall pattern work together to give the tires excellent traction on a variety of terrain surface conditions.

[0004] Unlike mud-terrain tires (MT), RT tires provide excellent off-road performance while ensuring good road performance. Their optimized tread pattern group and steel plate design can maintain the tire's grip on dry, wet and even snowy roads while helping to reduce the level of road noise inside the car during driving.

[0005] However, the current design of RT tires has not yet fully achieved the perfect combination of the advantages of all-terrain tires (AT) and mud-terrain tires (MT) patterns, which to some extent affects the realization of the perfect balance between off-road performance and road performance of RT tires. Utility Model Content

[0006] The main purpose of the utility model is to provide a tire to solve the problem that the RT tire in the prior art cannot achieve a perfect balance between off-road performance and road performance.

[0007] In order to achieve the above-mentioned object, the utility model provides a tire, wherein a pattern structure is arranged on the tread of the tire, and the pattern structure comprises: a plurality of circumferential grooves, wherein the plurality of circumferential grooves are arranged at intervals along the rotation axis of the tire to separate the pattern structure into a plurality of pattern groups including a middle pattern group and two shoulder pattern groups; a plurality of transverse grooves, wherein the plurality of transverse grooves are arranged at intervals along the circumference of the tire to separate each pattern group into a plurality of pattern blocks, wherein each pattern block of the shoulder pattern group comprises an upper unit and a lower unit connected to each other; and the plurality of pattern blocks of the shoulder pattern group are divided into Each of the treads comprises a plurality of pattern portions of a first pattern block, a second pattern block, a third pattern block and a fourth pattern block which are arranged in sequence; wherein the lower unit of the second pattern block is a mirror-symmetrical structure, and a symmetry plane A of the lower unit of the second pattern block passes through the rotation axis of the tire and is perpendicular to the tread; the lower unit of the first pattern block and the lower unit of the third pattern block are arranged in a mirror-symmetrical manner with respect to the symmetry plane A, and the shape of the lower unit of the fourth pattern block is different from the shapes of the lower unit of the first pattern block, the lower unit of the second pattern block and the lower unit of the third pattern block.

[0008] Further, the upper unit of the first pattern block and the upper unit of the third pattern block are the same in shape and size; and / or the upper unit of the second pattern block and the lower unit of the fourth pattern block are the same in shape and size.

[0009] Furthermore, each pattern block of the middle pattern group is provided with an oblique groove to separate each pattern block of the middle pattern group into two central blocks; in two adjacent pattern blocks of the middle pattern group, the two central blocks of one pattern block are centrally symmetrical with the two central blocks of the other pattern block about the first symmetry center B; wherein the first symmetry center B is located between the corresponding two pattern blocks of the middle pattern group.

[0010] Furthermore, the multiple pattern portions of the first shoulder pattern group are arranged in one-to-one correspondence with the multiple pattern portions of the second shoulder pattern group, and each pattern portion of the first shoulder pattern group and the corresponding pattern portion of the second shoulder pattern group are arranged centrally symmetrically about the second symmetry center C.

[0011] Furthermore, the area of ​​the two shoulder pattern groups located between the two shoulder lines of the tire is S1, and the area of ​​the middle pattern group is S2; wherein, S1 / S2=0.9 to 1.1; and / or the depth of the portion of the transverse groove located at the lower unit ranges from 3 mm to 10 mm; and / or a straight groove is provided on the upper unit, in which a straight steel sheet is embedded; and / or a nail hole is provided on the upper unit, in which a nail is embedded.

[0012] Furthermore, between two adjacent pattern blocks of the shoulder pattern group, there are provided: a transverse groove protrusion, the two ends of which are respectively connected to the corresponding two pattern blocks; and a main mud strip, one end of which is connected to the transverse groove protrusion, and the other end of which extends in a direction away from the middle pattern group.

[0013] Furthermore, the pattern structure includes a transition mud-slinging strip arranged around a portion of the circumference of the lower unit of the second pattern block, and two ends of the transition mud-slinging strip are respectively connected to two main mud-slinging strips located on opposite sides of the corresponding second pattern block.

[0014] Furthermore, a strip groove extending along the circumference of the tire is provided on the upper unit, a first side of the strip groove is located on a side of the tire shoulder line close to the middle pattern group, and a second side of the strip groove is located on a side of the tire shoulder line away from the middle pattern group.

[0015] Further, the distance between the first side of the strip-shaped groove and the shoulder line is a, and the width of the running surface of the tire is L; wherein a / L=0.02 to 0.04.

[0016] Furthermore, in two adjacent pattern blocks of the shoulder pattern group, a first transverse groove is arranged on the upper unit of one pattern block, and the first transverse groove is located on the side of the corresponding pattern block close to the middle pattern group; a second transverse groove is arranged on each pattern block of the middle pattern group, and the second transverse groove is located on the side of the corresponding pattern block close to the shoulder pattern group where the first transverse groove is arranged, so as to correspond to the first transverse groove; wherein the depth of the first transverse groove and the depth of the second transverse groove are both variable values.

[0017] By applying the technical solution of the utility model, a pattern structure is arranged on the tread of the tire of the utility model, and the pattern structure includes: a plurality of circumferential grooves, the plurality of circumferential grooves are arranged at intervals along the rotation axis of the tire to separate the pattern structure into a plurality of pattern groups including a middle pattern group and two shoulder pattern groups; a plurality of transverse grooves, the plurality of transverse grooves are arranged at intervals along the circumference of the tire to separate each pattern group into a plurality of pattern blocks, each pattern block of the shoulder pattern group includes an upper unit and a lower unit connected to each other; the plurality of pattern blocks of the shoulder pattern group are divided into The tire comprises a plurality of pattern parts, which are arranged in sequence, including a first pattern block, a second pattern block, a third pattern block and a fourth pattern block; wherein the lower unit of the second pattern block is a mirror-symmetrical structure, and the symmetry plane A of the lower unit of the second pattern block passes through the rotation axis of the tire and is perpendicular to the tread; the lower unit of the first pattern block and the lower unit of the third pattern block are arranged in a mirror-symmetrical manner about the symmetry plane A, and the shape of the lower unit of the fourth pattern block is different from the shapes of the lower unit of the first pattern block, the lower unit of the second pattern block and the lower unit of the third pattern block. In this way, the various performances of the tire of the utility model can be more balanced, and while ensuring that the tire has sufficient traction under various road conditions, the quiet comfort of the tire when driving on the road is optimized, and the problem that the RT tire in the prior art cannot achieve a perfect balance between off-road performance and road performance is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of a tread pattern structure of a tire according to an embodiment of the utility model is shown.

[0020] The above drawings include the following reference numerals:

[0021] 10. Circumferential groove;

[0022] 20, pattern group; 21, middle pattern group; 210, center block; 22, shoulder pattern group; 23, upper unit; 24, lower unit; 25, shoulder line; 200, pattern block; 201, first pattern block; 202, second pattern block; 203, third pattern block; 204, fourth pattern block;

[0023] 30. Transverse grooves;

[0024] 40. Oblique grooves;

[0025] 50. Nail holes;

[0026] 60, transverse groove convex;

[0027] 70. Mainly throw mud strips;

[0028] 80. Transition mud strips;

[0029] 90, strip groove;

[0030] 100, a first transverse groove;

[0031] 110, second transverse groove;

[0032] 120. Step section. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] like Figure 1 As shown, the utility model provides a tire, a tread of the tire is provided with a pattern structure, the pattern structure comprising: a plurality of circumferential grooves 10, the plurality of circumferential grooves 10 are arranged at intervals along the rotation axis of the tire to separate the pattern structure into a plurality of pattern groups 20 including a middle pattern group 21 and two shoulder pattern groups 22; a plurality of transverse grooves 30, the plurality of transverse grooves 30 are arranged at intervals along the circumference of the tire to separate each pattern group 20 into a plurality of pattern blocks 200, each pattern block 200 of the shoulder pattern group 22 comprises an upper unit 23 and a lower unit 24 connected to each other; the plurality of pattern blocks 200 of the shoulder pattern group 22 are divided into a plurality of first pattern blocks 200 and a plurality of second pattern blocks 200, each of which comprises a first pattern block 200 and a second pattern block ... The invention relates to a plurality of pattern portions of a first pattern block 201, a second pattern block 202, a third pattern block 203 and a fourth pattern block 204; wherein, the lower unit 24 of the second pattern block 202 is a mirror-symmetrical structure, and a symmetry plane A of the lower unit 24 of the second pattern block 202 passes through the rotation axis of the tire and is perpendicular to the tread; the lower unit 24 of the first pattern block 201 and the lower unit 24 of the third pattern block 203 are mirror-symmetrically arranged about the symmetry plane A, and the shape of the lower unit 24 of the fourth pattern block 204 is different from the shapes of the lower unit 24 of the first pattern block 201, the lower unit 24 of the second pattern block 202 and the lower unit 24 of the third pattern block 203.

[0035] In this way, the various performances of the tire of the utility model can be made more balanced. While ensuring that the tire has sufficient traction under various road conditions, the quietness and comfort of the tire when driving on the road are optimized, solving the problem that the RT tire in the prior art cannot achieve a perfect balance between off-road performance and road performance.

[0036] Specifically, the continuous distribution of the upper unit 23 and the lower unit 24 and the specific arrangement of the first pattern block 201, the second pattern block 202, the third pattern block 203 and the fourth pattern block 204 provide additional support and protection for the tire. In this way, when the tire is running at low pressure, it can provide additional traction on soft roads; when the tire is running on sharp gravel roads, it can prevent the "side cut" phenomenon caused by cutting the sidewall.

[0037] like Figure 1 As shown, the upper unit 23 of the first pattern block 201 and the upper unit 23 of the third pattern block 203 have the same shape and size; and / or the upper unit 23 of the second pattern block 202 and the lower unit 24 of the fourth pattern block 204 have the same shape and size.

[0038] like Figure 1 As shown, each pattern block 200 of the middle pattern group 21 is provided with an oblique groove 40 to separate each pattern block 200 of the middle pattern group 21 into two central blocks 210; in two adjacent pattern blocks 200 of the middle pattern group 21, the two central blocks 210 of one pattern block 200 and the two central blocks 210 of the other pattern block 200 are centrally symmetrically arranged about the first symmetry center B; wherein the first symmetry center B is located between the corresponding two pattern blocks 200 of the middle pattern group 21. In this way, each pattern block 200 of the middle pattern group 21 has strong rigidity and a large angle arrangement, which can quickly transmit the generated circumferential force, provide excellent traction and response performance, thereby reducing impact noise and ensuring smooth drainage.

[0039] Specifically, each tread block 200 of the middle tread group 21 is provided with a step portion 120 at its edge, which can reduce noise to a certain extent, prevent collision, scratching and the like, increase the effective edge of each tread block 200 of the middle tread group 21, and improve some snow performance of the tire.

[0040] like Figure 1 As shown, the multiple pattern portions of the first shoulder pattern group 22 are arranged one-to-one with the multiple pattern portions of the second shoulder pattern group 22, and each pattern portion of the first shoulder pattern group 22 and the corresponding pattern portion of the second shoulder pattern group 22 are arranged centrally symmetrically about the second symmetry center C.

[0041] Specifically, the area of ​​the two shoulder pattern groups 22 located between the two shoulder lines 25 of the tire is S1, and the area of ​​the middle pattern group 21 is S2; wherein, S1 / S2=0.9 to 1.1; and / or the depth of the portion of the transverse groove 30 located at the lower unit 24 ranges from 3 mm to 10 mm; and / or a straight groove is provided on the upper unit 23, in which a straight steel sheet is embedded; and / or a nail hole 50 is provided on the upper unit 23, in which a nail is embedded.

[0042] like Figure 1 As shown, since the depth of the portion of the transverse groove 30 located at the lower unit 24 is less than 3 mm and cannot provide good protection, and greater than 10 mm is not conducive to lightweight design, the depth range of the portion of the transverse groove 30 located at the lower unit 24 is set to 3 mm to 10 mm.

[0043] like Figure 1 As shown, each tread block 200 of the upper unit 23 is provided with a linear groove, and a linear steel sheet is embedded in the linear groove to balance the rigidity between multiple tread groups and improve the drainage performance of the tire. The linear steel sheet can be a 3D design, which can not only improve the overall handling performance of the tire, but also increase the connected snow traction ability.

[0044] like Figure 1 As shown, each pattern block 200 of the upper unit 23 is provided with a nail-inserting hole 50 , in which a nail is embedded.

[0045] Specifically, the nails may be studs to increase the traction capability of the tire on ice and snow.

[0046] like Figure 1 As shown, disposed between two adjacent pattern blocks 200 of the shoulder pattern group 22 are: a transverse groove protrusion 60, the two ends of which are respectively connected to the corresponding two pattern blocks 200, thereby increasing the rigidity of the tire shoulder, improving the handling ability of the tire, and reducing the noise of the tire; a main mud strip 70, one end of which is connected to the transverse groove protrusion 60, and the other end of which extends in a direction away from the middle pattern group 21, thereby increasing the self-cleaning performance of the tire on muddy ground, and reducing the risk of stones getting stuck in the transverse groove 30, further ensuring the off-road performance of the tire.

[0047] like Figure 1 As shown, the pattern structure includes a transition mud strip 80 arranged around a portion of the circumference of the lower unit 24 of the second pattern block 202, and both ends of the transition mud strip 80 are respectively connected to two main mud strips 70 located on opposite sides of the corresponding second pattern block 202.

[0048] like Figure 1As shown, the upper unit 23 is provided with a strip groove 90 extending along the circumference of the tire, the first side of the strip groove 90 is located on the side of the tire shoulder line 25 close to the middle pattern group 21, and the second side of the strip groove 90 is located on the side of the tire shoulder line 25 away from the middle pattern group 21. In this way, it is conducive to forming a dual-travel width setting, which can provide strong traction for the tire on gravel roads and muddy roads.

[0049] Specifically, the distance between the first side of the strip groove 90 and the shoulder line 25 is a, and the width of the running surface of the tire is L; wherein a / L=0.02 to 0.04.

[0050] like Figure 1 As shown, in two adjacent tread blocks 200 of the shoulder pattern group 22, a first transverse groove 100 is provided on the upper unit 23 of one tread block 200, and the first transverse groove 100 is located on the side of the corresponding tread block 200 close to the middle pattern group 21; each tread block 200 of the middle pattern group 21 is provided with a second transverse groove 110, and the second transverse groove 110 is located on the side of the corresponding tread block 200 close to the shoulder pattern group 22 where the first transverse groove 100 is provided, so as to be arranged corresponding to the first transverse groove 100; wherein, the depth of the first transverse groove 100 and the depth of the second transverse groove 110 are both variable values.

[0051] In this way, by providing the first transverse groove 100 and the second transverse groove 110, the traction in multiple directions can be improved and the rigidity of multiple pattern groups can be balanced. In addition, by setting the depth of the first transverse groove 100 and the depth of the second transverse groove 110 to variable values, and making the depth of the first transverse groove 100 and the opening of the second transverse groove 110 gradually increase in the direction close to the corresponding circumferential groove 10, it is possible to make the water in the pattern structure flow more easily in the direction of the opening, thereby improving the drainage performance of the tire.

[0052] Preferably, the pattern structure of the tread of the tire of the present invention includes three pattern pitches arranged irregularly along the circumference of the tire, and the pattern styles of different pattern pitches are the same and the widths are set in a certain ratio to minimize the occurrence of resonance phenomenon of the pattern structure.

[0053] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0054] The tread of the tire of the utility model is provided with a pattern structure, and the pattern structure comprises: a plurality of circumferential grooves 10, the plurality of circumferential grooves 10 are arranged at intervals along the rotation axis of the tire to separate the pattern structure into a plurality of pattern groups 20 including a middle pattern group 21 and two shoulder pattern groups 22; a plurality of transverse grooves 30, the plurality of transverse grooves 30 are arranged at intervals along the circumference of the tire to separate each pattern group 20 into a plurality of pattern blocks 200, each pattern block 200 of the shoulder pattern group 22 comprises an upper unit 23 and a lower unit 24 connected to each other; the plurality of pattern blocks 200 of the shoulder pattern group 22 are divided into a first pattern block 201, a lower pattern block 202, and a lower pattern block 203, a lower pattern block 204, and a lower pattern block 205, each of which comprises a first pattern block 201, a lower pattern block 206, a lower pattern block 207, a lower pattern block 208, a lower pattern block 209, a lower pattern block 2010, a lower pattern block 2011, a lower pattern block 2012, a lower pattern block 2013, a lower pattern block 2014, a lower pattern block 2015, a lower pattern block 2016, a lower pattern block 2017, a lower pattern block 2018, a lower pattern block 2020, a lower pattern block 2021, a lower pattern block 2022, a lower pattern block 2023, a lower pattern block 2024, a lower pattern block 2025, a lower pattern block 2026, a lower pattern block 2027, a lower pattern block 203, a lower pattern block 2030, a lower pattern block 2031, a lower pattern block 2032, a lower pattern block The second pattern block 202, the third pattern block 203 and the fourth pattern block 204 are multiple pattern parts; wherein the lower unit 24 of the second pattern block 202 is a mirror symmetrical structure, and the symmetry plane A of the lower unit 24 of the second pattern block 202 passes through the rotation axis of the tire and is perpendicular to the tread; the lower unit 24 of the first pattern block 201 and the lower unit 24 of the third pattern block 203 are arranged in a mirror symmetrical manner about the symmetry plane A, and the shape of the lower unit 24 of the fourth pattern block 204 is different from the shape of the lower unit 24 of the first pattern block 201, the lower unit 24 of the second pattern block 202 and the lower unit 24 of the third pattern block 203. In this way, the various performances of the tire of the utility model can be more balanced, while ensuring that the tire has sufficient traction under various road conditions, the quiet comfort of the tire when driving on the road is optimized, and the problem that the RT tire in the prior art cannot achieve a perfect balance between off-road performance and road performance is solved.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0057] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0058] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0059] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0060] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A tire, characterized in that: The tire tread is provided with a pattern structure, and the pattern structure comprises: A plurality of circumferential grooves (10), the plurality of circumferential grooves (10) being arranged at intervals along the rotation axis of the tire to divide the pattern structure into a plurality of pattern groups (20) including a middle pattern group (21) and two shoulder pattern groups (22); a plurality of transverse grooves (30), the plurality of transverse grooves (30) being arranged at intervals along the circumferential direction of the tire so as to separate each of the pattern groups (20) into a plurality of pattern blocks (200), each of the pattern blocks (200) of the shoulder pattern group (22) comprising an upper unit (23) and a lower unit (24) connected to each other; the plurality of pattern blocks (200) of the shoulder pattern group (22) being divided into a plurality of pattern portions each comprising a first pattern block (201), a second pattern block (202), a third pattern block (203) and a fourth pattern block (204) arranged in sequence; The lower unit (24) of the second pattern block (202) is a mirror-symmetrical structure, and a symmetry plane A of the lower unit (24) of the second pattern block (202) passes through the rotation axis of the tire and is perpendicular to the tread; the lower unit (24) of the first pattern block (201) and the lower unit (24) of the third pattern block (203) are arranged in a mirror-symmetrical manner with respect to the symmetry plane A, and the shape of the lower unit (24) of the fourth pattern block (204) is different from the shape of the lower unit (24) of the first pattern block (201), the lower unit (24) of the second pattern block (202), and the lower unit (24) of the third pattern block (203).

2. The tire according to claim 1, characterized in that The upper unit (23) of the first pattern block (201) and the upper unit (23) of the third pattern block (203) have the same shape and size; and / or The upper unit (23) of the second pattern block (202) and the lower unit (24) of the fourth pattern block (204) have the same shape and size.

3. The tire according to claim 1, characterized in that Each of the pattern blocks (200) of the middle pattern group (21) is provided with an oblique groove (40) so as to separate each of the pattern blocks (200) of the middle pattern group (21) into two central blocks (210); In two adjacent pattern blocks (200) of the middle pattern group (21), the two central blocks (210) of one pattern block (200) and the two central blocks (210) of the other pattern block (200) are centrally symmetrically arranged about a first symmetry center B; Wherein, the first symmetry center B is located between the corresponding two pattern blocks (200) of the middle pattern group (21).

4. The tire according to claim 3, characterized in that The plurality of pattern portions of the first shoulder pattern group (22) are arranged in one-to-one correspondence with the plurality of pattern portions of the second shoulder pattern group (22), and each pattern portion of the first shoulder pattern group (22) and the corresponding pattern portion of the second shoulder pattern group (22) are arranged in a centrally symmetrical manner about a second symmetry center C.

5. The tire according to claim 1, characterized in that The area of ​​the two shoulder pattern groups (22) between the two shoulder lines (25) of the tire is S1, and the area of ​​the middle pattern group (21) is S2; wherein S1 / S2=0.9 to 1.1; and / or The depth of the portion of the transverse groove (30) located at the lower unit (24) ranges from 3 mm to 10 mm; and / or The upper unit (23) is provided with a linear groove, in which a linear steel sheet is embedded; and / or The upper unit (23) is provided with a nail embedding hole (50), and a nail is embedded in the nail embedding hole (50).

6. The tire according to claim 1, characterized in that Disposed between two adjacent pattern blocks (200) of the shoulder pattern group (22): A transverse groove protrusion (60), wherein two ends of the transverse groove protrusion (60) are respectively connected to two corresponding pattern blocks (200); A main mud-throwing strip (70), one end of which is connected to the transverse groove protrusion (60), and the other end of which extends in a direction away from the middle pattern group (21).

7. The tire according to claim 6, characterized in that The tread structure comprises a transition mud-slinging strip (80) arranged around a portion of the circumferential side of the lower unit (24) of the second tread block (202), and two ends of the transition mud-slinging strip (80) are respectively connected to two main mud-slinging strips (70) located on opposite sides of the corresponding second tread block (202).

8. The tire according to claim 1, characterized in that The upper unit (23) is provided with a strip groove (90) extending along the circumference of the tire, a first side of the strip groove (90) is located on a side of the shoulder line (25) of the tire close to the middle pattern group (21), and a second side of the strip groove (90) is located on a side of the shoulder line (25) of the tire away from the middle pattern group (21).

9. The tire according to claim 8, characterized in that The distance between the first side of the strip-shaped groove (90) and the shoulder line (25) is a, and the width of the running surface of the tire is L; wherein a / L=0.02 to 0.

04.

10. The tire according to claim 1, characterized in that In two adjacent pattern blocks (200) of the shoulder pattern group (22), a first transverse groove (100) is provided on the upper unit (23) of one of the pattern blocks (200), and the first transverse groove (100) is located on a side of the corresponding pattern block (200) close to the middle pattern group (21); Each of the pattern blocks (200) of the middle pattern group (21) is provided with a second transverse groove (110), and the second transverse groove (110) is located on a side of the corresponding pattern block (200) close to the shoulder pattern group (22) provided with the first transverse groove (100), so as to be arranged corresponding to the first transverse groove (100); Wherein, the depth of the first transverse groove (100) and the depth of the second transverse groove (110) are both variable values.

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