Tire tread structure and tire with same

Abstract

The utility model discloses a tire tread structure and a tire with the same. The tire tread structure is provided with three main grooves which are parallel to one another and surround in the circumferential direction, and the main grooves are divided into two central pattern ribs in the middle and two tire shoulder pattern ribs on the two sides by the main grooves. A plurality of first lateral grooves are formed in the central pattern rib in the circumferential direction at unequal intervals, the central pattern rib is divided into a plurality of first pattern blocks which are distributed in the circumferential direction and have unequal lengths, and the first lateral grooves are obliquely arranged. A plurality of second lateral grooves are formed in the tire shoulder pattern rib in the circumferential direction at unequal intervals, and the tire shoulder pattern rib is divided into a plurality of second pattern blocks which are distributed in the circumferential direction and have unequal lengths. The first pattern block is provided with a first cutter groove pattern and a second cutter groove pattern which are inclined and have the same inclination angle, the second pattern block is provided with a third cutter groove pattern and a fourth cutter groove pattern in a crossed mode, and every two first pattern blocks adjacent in the axial direction and the first cutter groove pattern and the second cutter groove pattern on the first pattern blocks are arranged in a point symmetry mode; the tire provided by the utility model has the advantages of controllability, low noise and good road holding performance.

Description

Technical Field

[0001] The present application relates to the field of tire technology, and in particular to a tire tread structure and a tire having the same. Background Art

[0002] During the use of vehicles, the grip performance and wear performance of tires have always been the focus of market attention. However, with the continuous development of automobile industry technology and the continuous improvement of people's automobile concepts, higher and higher requirements have been put forward for tires that provide load-bearing capacity and transmit driving force. Especially with the development of new energy vehicles in recent years, the noise performance, ride comfort, fuel economy performance, etc. of tires have received more and more attention. Among the existing tires, according to different use requirements, the pitch width of the tire pattern used by the vehicle, the difference in pattern types, the number of fine sipes on the tread, etc. have a certain impact on the performance. If the tread pattern block has a small rigidity, it is conducive to reducing the noise of the tire and improving the ride comfort performance and wetland drainage performance, but it will reduce the wear performance and driving performance of the tire. On the contrary, if the tread pattern block has a large rigidity, it is conducive to improving the driving performance and wear performance of the tire, but it will increase noise and reduce ride comfort and wetland drainage performance. The design of fewer or no fine sipes on the tread ribs is beneficial to the handling performance and wear performance of the tire, but it will increase the noise of the tire and reduce the grip performance on icy and snowy roads; the design of more fine sipes on the tread ribs is beneficial to the comfort performance of the tire, reduces the noise of the tire, and improves the grip performance on icy and snowy roads, but is not conducive to the handling performance and wear performance of the tire;

[0003] Therefore, there is a need for a tire product that can improve riding comfort, wet performance, and grip performance on icy and snowy roads, while also maximizing the tire's handling performance and wear performance, thereby achieving a relatively balanced performance of the tires. Utility Model Content

[0004] The present application aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the first aspect of the present application provides a tire tread structure that can ensure good wear and handling performance, as well as low noise, good comfort, and grip performance on wet and snowy roads.

[0005] A second aspect of the present application provides a tire.

[0006] According to the tire tread structure of the first aspect of the present application, the tire tread structure surrounds the tire body circumferentially;

[0007] The tire tread structure is provided with three main grooves which are parallel to each other and surround the circumference of the tire body;

[0008] The three main grooves divide the tire tread structure into two central pattern ribs located in the middle and two shoulder pattern ribs located on both sides along the axial direction of the tire body;

[0009] The two central pattern ribs are each provided with a plurality of first lateral grooves at unequal intervals along the circumferential direction, the plurality of first lateral grooves divide the central pattern rib into a plurality of first pattern blocks of unequal lengths distributed along the circumferential direction, and the plurality of first lateral grooves are each arranged to be inclined at a certain angle along the axial direction;

[0010] The two shoulder pattern ribs are each provided with a plurality of second lateral grooves at unequal intervals along the circumferential direction, and the plurality of second lateral grooves divide the shoulder pattern rib into a plurality of second pattern blocks of unequal lengths distributed along the circumferential direction;

[0011] Each of the first pattern blocks is provided with an oblique first sipe and an oblique second sipe, and the oblique direction of the first sipe is the same as the oblique direction of the second sipe;

[0012] Each of the second pattern blocks is provided with a third sipe and a fourth sipe, wherein the fourth sipe is arranged crosswise with the third sipe, and one end of the fourth sipe is connected to the second lateral groove, and the other end of the fourth sipe is connected to the third sipe;

[0013] Two first pattern blocks adjacent to each other in the axial direction and the first sipes and the second sipes arranged thereon are arranged in point symmetry and have a staggered distance in the circumferential direction.

[0014] Based on the above technical scheme, the first aspect embodiment of the present application has at least the following beneficial effects: the present application avoids the problem of easy loud resonance caused by equidistantly arranged pattern blocks by unequally arranged first lateral grooves and second lateral grooves, thereby achieving the purpose of reducing noise; at the same time, through the design of sipes in different directions, the softness of the tread pattern ribs is increased, and when the vehicle is driving, the vibration absorption of adjacent tread rubber pattern blocks is increased, thereby improving ride comfort and improving the grip on icy and snowy roads. It effectively maintains the handling performance of the tire on icy and snowy roads, and ensures that the tire can provide good traction and braking force in both longitudinal and lateral directions to prevent skidding.

[0015] According to the tire tread structure of the first embodiment of the present application, both ends of the first lateral groove are connected to the main groove, one end of the second lateral groove is connected to the outside of the tire body, and the other end is connected to the main groove.

[0016] According to the tire tread structure of the embodiment of the first aspect of the present application, the plurality of second lateral grooves are all arranged obliquely, and the inclination directions of the first lateral grooves and the second lateral grooves are opposite.

[0017] According to the tire tread structure of the first aspect embodiment of the present application, the ratio of the width of the three main grooves and the two center pattern ribs to the width of the tire body is limited between 0.46 and 0.7, and the ratio of the width of each shoulder pattern rib to the width of the tire body is limited between 0.17 and 0.3.

[0018] According to the tire tread structure of the first embodiment of the present application, the sidewalls of the main groove are inclined, and the opening width of the main groove along the axial direction gradually decreases from the opening to the groove bottom.

[0019] According to the tire tread structure of the embodiment of the first aspect of the present application, the depth of each of the first sipes and each of the second sipes along the radial direction of the tire body is not exactly the same, the depth of each of the third sipes and each of the fourth sipes along the radial direction is not exactly the same, and the depth of the first sipes, the second sipes, the third sipes and the fourth sipes along the radial direction are all limited to between 1 mm and 6.5 mm.

[0020] According to the tire tread structure of the embodiment of the first aspect of the present application, the main groove, the first lateral groove, the second lateral groove or the first sipe is provided with a wedge-shaped decorative edge at a local position.

[0021] According to the tire tread structure of the first aspect embodiment of the present application, the first sipes are straight, the second sipes are wavy along the axial direction, one of the first sipes and two of the second sipes are evenly spaced on each of the first pattern blocks, and the first sipe is located between the two third sipes.

[0022] According to the tire tread structure of the embodiment of the first aspect of the present application, the pitch of the center pattern rib along the circumferential direction between two adjacent first pattern blocks is limited to 15 mm to 35 mm, the number of the first pattern blocks in the circumferential direction of each center pattern rib is limited to 50 to 80 blocks, and there are at least three different pitches between two adjacent first pattern blocks along the circumferential direction on the center pattern rib.

[0023] According to the tire of the second aspect of the present application, the tire includes a tire body and the above-mentioned tire tread structure.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic plan view of the tread structure of a tire in an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the structure of a wedge-shaped decorative edge on the first lateral groove in an embodiment of the present application;

[0028] Figure 3 for Figure 2 Cross-sectional view of the AA section;

[0029] Figure 4 This is a schematic diagram of the structure of the wedge-shaped decorative edge on the first sipe in one embodiment of the present application;

[0030] Figure 5 for Figure 4 Cross-sectional view of the middle BB section;

[0031] Figure numerals: tire tread structure 100; main groove 110; center pattern rib 120, first lateral groove 121, first pattern block 122, first sipe 1221, second sipe 1222; shoulder pattern rib 130, second lateral groove 131, second pattern block 132, third sipe 1321, fourth sipe 1322; wedge-shaped decorative edge 140. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0034] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0035] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0037] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0038] The embodiment of the present application provides a tire that can effectively solve the technical problem in the prior art that it is difficult to balance several performances of tires, such as comfort, wet and slippery performance, grip performance on icy and snowy roads, handling performance, and wear performance. It can ensure that the tire has good wear and handling performance, and can also ensure that the tire has good low-noise comfort, wet and slippery and icy and snowy road grip performance.

[0039] refer to Figures 1 to 5 The present application provides a tire, including a tire body (not shown in the figure) and a tire tread structure 100 surrounding the circumference of the tire body.

[0040] in, Figure 1 is a plan view of the tire tread structure 100 in this application, refer to Figure 1 The directions indicated by the arrows in the figure, wherein the horizontal direction is the axial direction of the tire body (hereinafter directly referred to as the axial direction), the vertical direction is the circumferential direction of the tire body (hereinafter directly referred to as the circumferential direction), and the direction perpendicular to the paper plane and inward is the radial direction of the tire body (not shown in the figure, hereinafter directly referred to as the radial direction). It should be noted that in this application, the dimension of each part of the tire tread structure 100 extending in the axial direction is called the width, the dimension extending in the circumferential direction is called the length, and the dimension extending in the radial direction is called the depth.

[0041] See also Figure 1The tire tread structure 100 is provided with three main grooves 110 that are parallel to each other and surround the circumference. The three main grooves 110 divide the tire tread structure 100 into two central pattern ribs 120 and two shoulder pattern ribs 130 located on both sides in the axial direction. The two central pattern ribs 120 are provided with a plurality of first lateral grooves 121 at unequal intervals in the circumferential direction. The plurality of first lateral grooves 121 divide the central pattern ribs 120 into a plurality of first pattern blocks 122 of unequal lengths distributed in the circumferential direction. The plurality of first lateral grooves 121 are all arranged at a certain angle along the axial direction. Figure 1 , that is, the direction in which the first lateral groove 121 extends in the axial direction forms a certain angle with the horizontal line.

[0042] It can be understood that each central pattern rib 120 is circumferentially distributed with first pattern blocks 122 of different lengths, and the distance between the center lines of two adjacent first pattern blocks 122 along the circumferential direction is the pitch between the two. Since the circumferential lengths of the first pattern blocks 122 are different, the pitch between two adjacent first pattern blocks 122 along the circumferential direction is also different.

[0043] Furthermore, the two shoulder pattern ribs 130 are provided with a plurality of second lateral grooves 131 at unequal intervals in the circumferential direction, and the plurality of second lateral grooves 131 divide the shoulder pattern ribs 130 into a plurality of second pattern blocks 132 of unequal lengths distributed along the circumferential direction. It can be understood that the pitch between two adjacent second pattern blocks 132 along the circumferential direction is also different.

[0044] In the present application, the first lateral groove 121 and the second lateral groove 131 are provided as the pitch dividing lines of the center pattern rib 120 and the shoulder pattern rib 130, respectively, so as to improve the drainage performance and operability of the tire. Since the first lateral groove 121 and the second lateral groove 131 are provided at unequal intervals along the circumferential direction, the problem that the pattern block is prone to loud resonance is solved, and the effect of reducing tire noise is achieved.

[0045] Furthermore, each first pattern block 122 is provided with an oblique first sipe 1221 and an oblique second sipe 1222, and the oblique direction of the first sipe 1221 is the same as the oblique direction of the second sipe 1222. Figure 1 The first sipe 1221 and the second sipe 1222 are parallel to each other along the axial extension direction on the first pattern block 122, and both are at a certain angle to the horizontal line. By arranging the first lateral groove 121, the first sipe 1221 and the second sipe 1222 on the circumference of the central pattern rib 120, the tread stiffness of the central pattern rib 120 can be effectively reduced, and the comfort of the tire and the grip on icy and snowy roadsides can be improved.

[0046] Furthermore, each second pattern block 132 is provided with a third sipe 1321 and a fourth sipe 1322, the fourth sipe 1322 is arranged crosswise with the third sipe 1321, and one end of the fourth sipe 1322 is connected to the second lateral groove 131, and the other end is connected to the third sipe 1321. The design of the third sipe 1321 and the fourth sipe 1322 can reduce the rigidity of the shoulder pattern rib 130 to a certain extent, improve comfort, and reduce tire noise and enhance tire drainage performance.

[0047] Furthermore, the two first tread blocks 122 adjacent in the axial direction and the first sipes 1221 and the second sipes 1222 arranged thereon are arranged in point symmetry and have a staggered distance in the circumferential direction. It can be understood that the intervals between the first tread blocks 122 on the two central tread ribs 120 are consistent, which improves the aesthetics of the tire. It can be understood that the two first lateral grooves 121 adjacent in the axial direction are staggered in the circumferential direction. In other words, the two adjacent endpoints of the two first lateral grooves 121 adjacent in the axial direction are not on the same horizontal line. Figure 1 That is, the right end point of the left first lateral groove 121 and the left end point of the right first lateral groove 121 are not on the same horizontal line, but are distributed up and down along the circumference. With this design, when the tread contacts the ground, the contact part of the central pattern rib 120 with the ground is not entirely the first lateral groove 121, that is, the contact part of a part of the central pattern rib 120 with the ground is the first lateral groove 121, and the contact part of another part of the central pattern rib 120 with the ground is the first pattern block 122. This arrangement can ensure the support strength of the tire and ensure that the tire has good stability on the ground.

[0048] Optionally, refer to Figure 1 , both ends of the first lateral groove 121 are connected to the main groove 110, and one end of the second lateral groove 131 is connected to the outside of the tire body, and the other end is connected to the main groove 110. In other words, the first lateral groove 121 axially penetrates the center pattern rib 120 and connects the main grooves 110 on both sides of the center pattern rib 120; the second lateral groove 131 axially penetrates the shoulder pattern rib 130 and connects the tire outside and the main groove 110 on both sides of the shoulder pattern rib 130.

[0049] Optionally, refer to Figure 1 The second lateral groove 131 is also obliquely arranged, that is, the axial extension direction of the second lateral groove 131 also forms a certain angle with the horizontal line, and the inclination directions of the first lateral groove 121 and the second lateral groove 131 are opposite.

[0050] Optionally, the center line of the first lateral groove 121 is defined as a straight line, and the center line of the second lateral groove 131 is not defined as a straight line, but may be set as a curve extending along the axial direction, which is not specifically limited in the present application.

[0051] Optionally, refer to Figure 1 The shoulder pattern ribs 130 on the left and right sides along the axial direction are designed to be point symmetrical.

[0052] Optionally, refer to Figure 1 , the inclination angles of the first sipe 1221 and the second sipe 1222 can be set to be the same as the inclination angle of the first lateral groove 121, that is, the first lateral groove 121, the first sipe 1221 and the second sipe 1222 are parallel to each other along the axial extension direction. It should be noted that the inclination angles of the first sipe 1221 and the second sipe 1222 can also be set to be different from the inclination angles of the first lateral groove 121, and this application does not make specific limitations here.

[0053] In some embodiments, reference Figure 1 The first sipe 1221 is linear along the axial direction, and the second sipe 1222 is wavy along the axial direction. It should be noted that the shapes of the first sipe 1221 and the second sipe 1222 can be linear, wavy or other curved arcs. The embodiment of the present application only exemplifies an optimal pattern shape selection, and does not specifically limit the shapes of the first sipe 1221 and the second sipe 1222.

[0054] Optionally, in the present application, the circumferential lengths of the first sipe 1221 and the second sipe 1222 are both less than 2.0 mm.

[0055] Optionally, refer to Figure 1 The three main grooves 110 are provided with wedge-shaped decorative edges 140 at local positions.

[0056] Optionally, refer to Figure 2 and Figure 3 A wedge-shaped decorative edge 140 is provided at a local position of the first lateral groove 121 .

[0057] Optionally, refer to Figure 1 A wedge-shaped decorative edge 140 is provided at a local position of the second lateral groove 131 .

[0058] Optionally, refer to Figure 4 and Figure 5 The first knife groove 1221 is provided with a wedge-shaped decorative edge 140 at a local position.

[0059] It should be noted that the wedge-shaped decorative edge 140 is an oblique triangle shape with a side length of 2mm to 10mm and a depth of 1mm to 6mm. When the vehicle is driving, the sharp corners of the pattern blocks are prone to friction with the ground, which will not only cause surface wear of the tire, but also generate noise. In the present application, by setting a first wedge-shaped decorative edge 140 at a local position of the main groove 110 and setting a second wedge-shaped decorative edge 140 at a local position of the first lateral groove 121 and the second lateral groove 131, the sharp edge of the tire tread can be removed, and excessive deformation when the tire contacts the ground can be reduced, thereby reducing abnormal friction between the tire and the ground, increasing the ground contact area, and reducing tire wear, reducing tire noise, and improving handling performance. Furthermore, when a car is driving on a wet road, water will be squeezed into the tire. The first wedge-shaped decorative edge 140 set at a local position of the main groove 110 and the second wedge-shaped decorative edge 140 set at a local position of the first lateral groove 121 and the second lateral groove 131 can increase the drainage channel of the tire, improve the drainage performance of the tire, and thereby enhance the wetland safety performance.

[0060] For example, reference Figure 1 The first pattern block 122 is provided with two second sipes 1222 and one first sipe 1221, wherein the first sipe 1221 is arranged between the two second sipes 1222, and the first sipe 1221 and the second sipe 1222 can be arranged with equal spacing or unequal spacing in the circumferential direction, which is not specifically limited in the present application.

[0061] Optionally, refer to Figure 1 , the width of the second lateral groove 131 along the axial direction is greater than the width of the third sipe 1321 .

[0062] Optionally, refer to Figure 1 , three third sipes 1321 are provided on each second pattern block 132, and the three third sipes 1321 are arranged at equal intervals along the circumferential direction. It should be noted that the number of third sipes 1321 on each second pattern block 132 may be 2, 4 or other numbers, and the plurality of third sipes 1321 may be arranged at unequal intervals along the circumferential direction, which is not further limited in the present application.

[0063] Optionally, the radial depths of each first sipe 1221 and each second sipe 1222 are not completely the same, and the depths of each first sipe 1221 and each second sipe 1222 are limited to between 1 mm and 6.5 mm. The small first sipes 1221 and second sipes can effectively reduce the rigidity of the middle part of the tire, improve comfort and grip on icy and snowy roads, and the depths of the first sipes 1221 and second sipes 1222 are specifically designed according to actual needs.

[0064] Optionally, in the present application, the radial depths of each third knife groove 1321 and each fourth knife groove 1322 are not exactly the same, and the depths of each third knife groove 1321 and each fourth knife groove 1322 are limited between 1 mm and 6.5 mm. The fine third knife grooves 1321 and fourth knife grooves 1322 can effectively reduce the stiffness of the tire shoulder and improve the comfort. Specifically, the depths of the third knife grooves 1321 and the fourth knife grooves 1322 are designed according to actual needs.

[0065] In some embodiments, the side walls of the main groove 110 are inclined, that is, the axial opening width of the main groove 110 gradually decreases from the opening to the bottom of the groove. This design can not only improve the self-cleaning performance of the tire to prevent stones from being pinched, but also the maximum width of the opening of the main groove 110 can quickly drain water, which can provide excellent wet anti-skid performance and cornering stability and precise steering responsiveness, which is beneficial to improving the wet safety performance of the tire.

[0066] Optionally, the radial opening width of the main groove 110 is limited to 5 mm to 14 mm, and the inclination angle of the side wall of the main groove 110 is limited to 6° to 12°. The main groove 110 within this range has good drainage performance and anti-stone clamping performance.

[0067] In some embodiments, the ratio of the sum of the widths of the three main grooves 110 and the two center pattern ribs 120 to the width of the tire body is limited to between 0.46 and 0.7. Optionally, the ratio of the width of each shoulder pattern rib 130 to the width of the tire body is limited to between 0.17 and 0.3. This width design can balance the ratio between the area of ​​the middle part of the tire tread and the area of ​​the tire shoulder, ensuring that the middle part of the tread and the shoulder have sufficient area to support the entire tire, thereby ensuring the support strength of the entire tread.

[0068] It can be understood that each central pattern rib 120 is circumferentially distributed with first pattern blocks 122 of different lengths, and the distance between the center lines of two adjacent first pattern blocks 122 along the circumferential direction is the pitch between the two. Since the circumferential lengths of the first pattern blocks 122 are different, the pitch between two adjacent first pattern blocks 122 along the circumferential direction is also different.

[0069] Optionally, the pitch between two circumferentially adjacent first pattern blocks 122 of each central pattern rib 120 is limited to 15 mm to 35 mm. Optionally, the number of circumferentially adjacent first pattern blocks 122 of each central pattern rib 120 is limited to 50 to 80. Optionally, there are at least three different pitches between two circumferentially adjacent first pattern blocks 122 on each central pattern rib 120. The central pattern rib 120 adopts a multi-pattern block design with more than three pitches, which is beneficial to reducing tire noise and improving ride comfort performance. Specifically, the pitch between two circumferentially adjacent first pattern blocks 122 of each central pattern rib 120 and the number of circumferentially arranged first pattern blocks 122 on each central pattern rib 120 can be designed according to actual needs, and this application does not give examples one by one.

[0070] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A tire tread structure, characterized in that: The tire tread structure surrounds the tire body circumferentially; The tire tread structure is provided with three main grooves which are parallel to each other and surround the circumference of the tire body; The three main grooves divide the tire tread structure into two central pattern ribs located in the middle and two shoulder pattern ribs located on both sides along the axial direction of the tire body; The two central pattern ribs are each provided with a plurality of first lateral grooves at unequal intervals along the circumferential direction, the plurality of first lateral grooves divide the central pattern rib into a plurality of first pattern blocks of unequal lengths distributed along the circumferential direction, and the plurality of first lateral grooves are each arranged to be inclined at a certain angle along the axial direction; The two shoulder pattern ribs are each provided with a plurality of second lateral grooves at unequal intervals along the circumferential direction, and the plurality of second lateral grooves divide the shoulder pattern rib into a plurality of second pattern blocks of unequal lengths distributed along the circumferential direction; Each of the first pattern blocks is provided with an oblique first sipe and an oblique second sipe, and the oblique direction of the first sipe is the same as the oblique direction of the second sipe; Each of the second pattern blocks is provided with a third sipe and a fourth sipe, wherein the fourth sipe is arranged crosswise with the third sipe, and one end of the fourth sipe is connected to the second lateral groove, and the other end of the fourth sipe is connected to the third sipe; Two first pattern blocks adjacent to each other in the axial direction and the first sipes and the second sipes arranged thereon are arranged in point symmetry and have a staggered distance in the circumferential direction.

2. The tire tread structure according to claim 1, characterized in that: Both ends of the first lateral groove are communicated with the main groove, and one end of the second lateral groove is communicated with the outside of the tire body, and the other end is communicated with the main groove.

3. The tire tread structure according to claim 1, characterized in that: The plurality of second lateral grooves are all arranged obliquely, and the first lateral grooves and the second lateral grooves have opposite inclination directions.

4. The tire tread structure according to claim 1, characterized in that: The ratio of the width of the three main grooves and the two central pattern ribs to the width of the tire body is limited to between 0.46 and 0.7, and the ratio of the width of each shoulder pattern rib to the width of the tire body is limited to between 0.17 and 0.

3.

5. The tire tread structure according to claim 1, characterized in that: The sidewalls of the main groove are inclined, and the opening width of the main groove along the axial direction gradually decreases from the opening to the groove bottom.

6. The tire tread structure according to claim 1, characterized in that: The depths of each of the first sipes and each of the second sipes along the radial direction of the tire body are not exactly the same, the depths of each of the third sipes and each of the fourth sipes along the radial direction are not exactly the same, and the depths of the first sipes, the second sipes, the third sipes and the fourth sipes along the radial direction are all limited to between 1 mm and 6.5 mm.

7. The tire tread structure according to claim 1, characterized in that: The main groove, the first lateral groove, the second lateral groove or the first sipe is provided with a wedge-shaped decorative edge at a local position.

8. The tire tread structure according to claim 1, characterized in that: The first sipes are straight, the second sipes are wavy along the axial direction, one first sipe and two second sipes are evenly spaced on each of the first pattern blocks, and the first sipe is located between the two third sipes.

9. The tire tread structure according to claim 1, characterized in that: The pitch between two adjacent first pattern blocks along the circumferential direction of the central pattern rib is limited to 15 mm to 35 mm, the number of the first pattern blocks in the circumferential direction of each central pattern rib is limited to 50 to 80, and there are at least three different pitches between two adjacent first pattern blocks along the circumferential direction on the central pattern rib.

10. A tire, characterized in that: The invention comprises a tire body and the tire tread structure according to any one of claims 1 to 9.

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