Tire tread structure

Abstract

The invention provides a tire tread structure. The tire tread structure comprises strip-shaped protrusions arranged on a tire tread of a tire, and the strip-shaped protrusions are annularly arranged; the transverse groove groups are arranged at intervals in the width direction of the tire, each transverse groove group comprises a plurality of transverse grooves, and the transverse grooves are arranged at intervals in the circumferential direction of the tire; in two adjacent transverse groove groups, the plurality of transverse grooves in one transverse groove group and the plurality of transverse grooves in the other transverse groove group are arranged in a one-to-one correspondence manner, and a first included angle A1 is formed between each transverse groove and the corresponding transverse groove; the longitudinal grooves are formed in the width direction of the tire at intervals, extend in the circumferential direction of the tire and penetrate through the transverse grooves; wherein the tread is divided into a plurality of pattern blocks by the longitudinal grooves and the transverse grooves, and sheet structures are arranged in the pattern blocks. The snow tire effectively solves the problem that in the prior art, a snow tire is poor in control performance under dry and wet road conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of tires, and in particular to a tire tread structure. Background Art

[0002] At present, tires are one of the key components of automobiles, which directly affect the safety, comfort and handling of vehicles during driving, especially the pattern structure on the tire tread, which has a direct impact on tire performance. At the same time, in winter in cold areas, roads are easily covered with snow. When ordinary tires face snowy road conditions, their grip will be greatly reduced, which will lead to reduced driving stability, handling and safety of the vehicle.

[0003] In the prior art, areas that often face snowy road conditions are usually equipped with snow tires. Compared with traditional household tires, the tread pattern of snow tires will adopt a design with increased pattern depth and width and simplified pattern structure, so as to increase the rigidity of the pattern blocks to increase the friction between the tread and the snow (tire grip).

[0004] However, although the above design improves the handling performance of the tire on snow to a certain extent, in fact, with the gradual development of society, for most areas, the duration of snow on the road is not long (cities will quickly carry out snow removal work), and during and after the snow removal process, the tires will travel on wet roads and dry roads where the snow has melted. Especially when driving on wet roads, traditional snow tires are very likely to produce water film between the ground, which will greatly reduce the handling performance of the vehicle and seriously affect the driving safety of people. Summary of the invention

[0005] The main purpose of the present invention is to provide a tire tread structure to solve the problem of poor handling performance of snow tires in the prior art under dry and wet road conditions.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a tire tread structure, comprising: strip-shaped protrusions, which are arranged on the tread of the tire, and the strip-shaped protrusions are arranged in a ring shape; at least two groups of transverse groove groups, which are arranged at intervals along the width direction of the tire, and each transverse groove group includes a plurality of transverse grooves, and the plurality of transverse grooves are arranged at intervals along the circumference of the tire; in two adjacent transverse groove groups, the plurality of transverse grooves in one transverse groove group are arranged one-to-one with the plurality of transverse grooves in the other transverse groove group, and the transverse grooves and the corresponding transverse grooves are arranged at a first angle A1; a plurality of longitudinal grooves, which are arranged at intervals along the width direction of the tire, and the longitudinal grooves extend along the circumference of the tire and penetrate the transverse grooves; wherein the longitudinal grooves and the transverse grooves divide the tread into a plurality of pattern blocks, and a sheet structure is arranged in the pattern blocks.

[0007] Furthermore, one end of the lateral groove away from the center plane S of the tire is connected to the side of the tire; and / or, the lateral groove group is divided into two groups, and the end of the lateral groove in one group of lateral grooves away from the side is located between two lateral grooves of the other group of lateral grooves.

[0008] Furthermore, the sheet structure includes a plurality of interconnected straight segments and a plurality of inclined segments, wherein the inclined segment is located between two adjacent straight segments; wherein the inclined segment and the straight segment are arranged at a second angle A2 so that the distance between two adjacent inclined segments gradually increases.

[0009] Furthermore, a plurality of longitudinal grooves separate the tread into two shoulder pattern portions and a middle pattern portion between the two shoulder pattern portions; the transverse grooves within the shoulder pattern portion are shoulder transverse grooves; the shoulder transverse grooves include a first sub-transverse groove and a second sub-transverse groove which are interconnected; an end of the first sub-transverse groove away from the second sub-transverse groove is connected to the side of the tire; wherein the first sub-transverse groove extends along the width direction of the tire, and an extension direction of the second sub-transverse groove forms a third angle A3 with the width direction of the tire, and the third angle A3 satisfies: 0°<A3≤15°; the shoulder transverse groove has a length L1, the first sub-transverse groove has a length L2, and the length L1 and the length L2 satisfy: 0.3L1≤L2≤0.4L1.

[0010] Further, the middle tread portion includes a center tread portion and a crown tread portion, at least part of the center tread portion coincides with the center plane S of the tire, the crown tread portion is located between the center tread portion and the shoulder tread portion, the transverse grooves located in the crown tread portion are crown transverse grooves, the crown transverse grooves include a third sub-transverse groove, a fourth sub-transverse groove and a fifth sub-transverse groove that are interconnected, the fourth sub-transverse groove is located between the third sub-transverse groove and the fifth sub-transverse groove, and the third sub-transverse groove is arranged away from the center plane S of the tire relative to the fifth sub-transverse groove; wherein, the extension direction of the third sub-transverse groove forms a fourth angle A4 with the width direction of the tire, the extension direction of the fifth sub-transverse groove forms a fifth angle A5 with the width direction of the tire, and the fourth angle A4 and the fifth angle A5 satisfy: 15°<A4≤30°, 25°≤A5≤50°.

[0011] Furthermore, the transverse groove located in the central pattern portion is a central transverse groove, and a sixth angle A6 is formed between the central transverse groove and the width direction of the tire, and the sixth angle A6 satisfies: 25°≤A6≤50°.

[0012] Furthermore, in the direction from the side of the tire to the center plane of the tire, the width of at least part of the shoulder transverse grooves gradually increases; and / or, the width of at least part of the crown transverse grooves gradually increases; and / or, the width of the center transverse grooves gradually increases.

[0013] Further, there is a first angle difference A7 between the extension direction of one groove wall of the second sub-transverse groove and the extension direction of the other groove wall, so that the width of the second sub-transverse groove gradually increases, and the first angle difference A7 satisfies: 1°≤A7≤3°; and / or,

[0014] There is a second angle difference A8 between the extension direction of one groove wall of the third sub-transverse groove and the extension direction of the other groove wall, so that the width of the third sub-transverse groove gradually increases, and the second angle difference A8 satisfies: 1°≤A8≤3°; and / or,

[0015] There is a third angle difference A9 between the extension direction of one groove wall of the fifth sub-transverse groove and the extension direction of the other groove wall, so that the width of the fifth sub-transverse groove gradually increases, and the third angle difference A9 satisfies: 2°≤A9≤4°; and / or,

[0016] There is a fourth angular difference A10 between the extending direction of one groove wall of the central transverse groove and the extending direction of the other groove wall, so that the width of the central transverse groove gradually increases, and the fourth angular difference A10 satisfies: 4°≤A10≤6°.

[0017] Further, the sheet-like structure located in the middle pattern portion is a first sheet-like structure, and the first sheet-like structure has N first accommodating recesses; N first matching protrusions are arranged on the bottom of the groove portion for accommodating the first sheet-like structure, and at least part of the first matching protrusions are located in the first accommodating recess and are limited and stopped by the inner wall of the first accommodating recess; wherein, N satisfies: L-15mm≤N·15mm<L, N is a natural number, L is the length of the first sheet-like structure, and when N is greater than or equal to 2, the N first accommodating recesses are spaced apart along the length direction of the first sheet-like structure, and the N first matching protrusions and the N first accommodating recesses are arranged one-to-one.

[0018] Furthermore, the sheet-like structure located on the shoulder pattern portion is a second sheet-like structure, which includes a main body portion and an extension portion that are connected to each other, the main body portion having a second accommodating recess, and a second matching protrusion is arranged on the bottom of the groove portion for accommodating the second sheet-like structure, at least part of the second matching protrusion is located in the second accommodating recess and is limited in position with the inner wall of the second accommodating recess; wherein at least part of the extension portion is arranged in an arc shape, and the extension portion is located on the side of the main body away from the center plane S of the tire.

[0019] Furthermore, there are multiple groups of strip protrusions, in one group of strip protrusions, multiple strip protrusions are arranged in sequence, and the strip protrusions are arranged in an arc shape away from the upper surface of the tread; and / or, the height H1 of the strip protrusions satisfies: 0.3mm≤H1≤1mm.

[0020] Furthermore, the tire tread structure also includes: a first recess, which is arranged on the pattern block, one end of the first recess is located in the pattern block, and the other end of the first recess extends to the side of the pattern block to communicate with the longitudinal groove and / or the transverse groove; wherein the first recess includes a first sub-recess and a second sub-recess that are connected to each other, the first sub-recess extends to the side of the pattern block, and along the direction from the first sub-recess to the second sub-recess, the depth of at least part of the first sub-recess gradually increases, and the depth of at least part of the second sub-recess gradually increases, and the maximum depth G1max of the first sub-recess and the maximum depth G2max of the second sub-recess satisfy: 4mm≤G1max≤5mm, 1mm≤G2max≤2mm.

[0021] Furthermore, the first recess located in the center tread portion is a center recess, the center recess is connected to the longitudinal groove, and the width of the first sub-recess of the center recess is greater than the width of the second sub-recess; the first recess located in the crown tread portion is a crown recess, at least one crown recess is connected to the longitudinal groove, and at least another crown recess is connected to the transverse groove; wherein, the crown recess connected to the longitudinal groove is arranged opposite to the center recess.

[0022] Furthermore, the tire tread structure also includes: a second recess, which is arranged on the side of the pattern block located in the shoulder pattern portion, the second recess is located in the transverse groove and extends to the tread; a third recess, which is arranged on the side of the pattern block located in the shoulder pattern portion, the third recess is located in the longitudinal groove and extends to the tread; wherein, the transverse groove located in the shoulder pattern portion has a length L3, the pattern block located in the shoulder pattern portion has a length L4, the length L5 of the second recess satisfies the length L3: 0.5L4≤L5≤0.7L4; the length L6 of the third recess satisfies the length L4: 0.3L4≤L6≤0.4L4.

[0023] Furthermore, pattern groups are formed between pattern blocks located between at least three adjacent lateral grooves. There are multiple pattern groups, including a first pattern group, a second pattern group and a third pattern group. The pitch size of the first pattern group, the pitch size of the second pattern group and the pitch size of the third pattern group are different.

[0024] Furthermore, the tire tread structure also includes: a fourth recess, which is arranged on a pattern block located in the shoulder pattern portion, the fourth recess is located on a side of the sheet structure away from the center plane of the tire, one end of the fourth recess is located in the pattern block, and the other end of the fourth recess extends to the side of the pattern block to form a connecting port connected to the transverse groove; a serrated protrusion, which is arranged on the bottom wall of the fourth recess; wherein, within a pattern group, the connecting ports of two adjacent fourth recesses on the pattern blocks located in the shoulder pattern portion are arranged opposite to each other.

[0025] Further, the serrated protrusion includes a plurality of serrated structures arranged along the extension direction of the fourth recess, the outer surface of the serrated structure has a first plane and a second plane connected to each other, the first plane is set at an eleventh angle A11 with the bottom wall of the fourth recess, the second plane is set at a twelfth angle A12 with the bottom wall of the fourth recess, the eleventh angle A11 and the twelfth angle A12 satisfy: 70°≤A11≤90°, 10°≤A12≤30°, and the second plane is arranged opposite to the connecting port; wherein, the depth G3 of the fourth recess satisfies: 0.5mm≤G3≤2mm, the width W1 of the fourth recess satisfies: 1.5mm: ≤W1≤5.5mm, and the height H2 of the serrated structure satisfies: 0.4mm≤H2≤0.6mm.

[0026] Furthermore, the contact surface between the tread and the driving surface has a width B, and both sides of the center plane S of the tire are provided with: a first longitudinal groove and a second longitudinal groove arranged in sequence from the side of the tire to the center plane S, and the width W2 of the first longitudinal groove, the width W3 of the second longitudinal groove and the width B satisfy: 0.03B≤W2≤0.05B, 0.01B≤W3≤0.03B; and / or, the tread has an area S1, the pattern block has an area S2, and the area S1 and the area S2 satisfy: 0.25S1≤S2≤0.4S1.

[0027] Furthermore, the second longitudinal groove is a linear groove, and the width W2 of the first longitudinal groove gradually increases along the circumferential direction of the tire; wherein, there is a fifth angle difference A13 between the extension direction of the first groove wall of the first longitudinal groove and the extension direction of the other groove wall, and the fifth angle difference A13 satisfies: 0°<A13≤5°.

[0028] According to the technical solution of the present invention, the strip-shaped protrusions of the tire tread structure are arranged on the tread of the tire, the strip-shaped protrusions are arranged in a ring shape, at least two groups of transverse grooves are arranged at intervals along the width direction of the tire, each transverse groove group includes a plurality of transverse grooves, and the plurality of transverse grooves are arranged at intervals along the circumference of the tire, in two adjacent transverse groove groups, the plurality of transverse grooves in one transverse groove group are arranged one-to-one with the plurality of transverse grooves in the other transverse groove group, the transverse grooves and the transverse grooves arranged corresponding thereto are arranged at a first angle A1, the plurality of longitudinal grooves are arranged at intervals along the width direction of the tire, the longitudinal grooves extend along the circumference of the tire, and penetrate the transverse grooves. Among them, the longitudinal grooves and the transverse grooves divide the tread into a plurality of pattern blocks, and the pattern blocks are provided with a sheet structure. In this way, the strip-shaped protrusions arranged on the outer surface of the tread can actually form a "dark pattern" structure, thereby increasing the tread roughness of the tire, and then comprehensively improving the tire's grip performance under different road conditions (snow, wet roads and dry land), which helps to initially improve the tire's handling performance under different road conditions, and the above-mentioned arrangement of the transverse groove group and the transverse groove actually forms a "V"-shaped single guide pattern on the tread, which can improve the tire's drainage and snow discharge performance while allowing the tire to "bite" the ground during driving, further improving the tire's grip performance and reducing slipping. At the same time, the sheet structure arranged in the pattern block can cut the snow surface or water film to avoid the formation of a complete medium film between the tread and the driving surface, which leads to a decrease in the friction coefficient of the tread, further improving the grip performance of the tire. The above three designs interact and complement each other, greatly increasing the interaction force between the tread and the driving surface, ensuring that the tire has high handling performance under different road conditions, thereby solving the problem of poor handling performance of snow tires in dry and wet road conditions in the prior art, and improving the driving safety of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a 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 of the present invention. In the drawings:

[0030] Figure 1 A partial front view showing an embodiment of a tire tread structure according to the present invention;

[0031] Figure 2 Shows Figure 1 An enlarged schematic diagram of the tire tread structure at point C;

[0032] Figure 3 Shows Figure 1 A front view of a pattern group of a tire tread structure;

[0033] Figure 4 Shows Figure 1A cross-sectional view of a first concave portion of a tire tread structure;

[0034] Figure 5 Shows Figure 1 A front view of the first sheet structure of the tire tread structure when N is 0;

[0035] Figure 6 Shows Figure 1 A front view of the first sheet structure of the tire tread structure when N is 1;

[0036] Figure 7 Shows Figure 1 A front view of the first sheet structure of the tire tread structure when N is 2;

[0037] Figure 8 Shows Figure 1 A front view of a second sheet structure of a tire tread structure;

[0038] Fig. 9 Shows Figure 1 A cross-sectional view of a strip-shaped protrusion of a tire tread structure;

[0039] Fig.10 Shows Figure 1 A cross-sectional view of a shoulder transverse groove of a tire tread structure in FIG.

[0040] Fig.11 Shows Figure 1 A cross-sectional view of a third concave portion of the tire tread structure;

[0041] Fig.12 Shows Figure 1 Cross-sectional view of the fourth concave portion of the tire tread structure in FIG.

[0042] The above drawings include the following reference numerals:

[0043] 1. Strip-shaped protrusions;

[0044] 2. transverse groove group; 21. shoulder transverse groove; 211. first sub-transverse groove; 212. second sub-transverse groove; 22. crown transverse groove; 221. third sub-transverse groove; 222. fourth sub-transverse groove; 223. fifth sub-transverse groove; 23. center transverse groove;

[0045] 3. longitudinal groove; 31. first longitudinal groove; 32. second longitudinal groove;

[0046] 4. Pattern blocks;

[0047] 5. sheet structure; 51. straight line segment; 52. inclined segment; 53. first sheet structure; 531. first receiving recess; 54. second sheet structure; 541. main body; 542. second receiving recess; 543. extension portion;

[0048] 6. Shoulder pattern;

[0049] 7. Center pattern part;

[0050] 8. Crown pattern part;

[0051] 9. First recess; 91. First sub-recess; 92. Second sub-recess; 93. Central recess; 94. Crown recess;

[0052] 10. The second concave part;

[0053] 11. The third concave part;

[0054] 12. Pattern group;

[0055] 13. The fourth concave part;

[0056] 15. serrated protrusion; 151. first plane; 152. second plane. DETAILED DESCRIPTION

[0057] 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 invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0058] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0059] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0060] In order to solve the problem of poor handling performance of snow tires in the prior art under dry and wet road conditions, the present application provides a tire tread structure.

[0061] like Figures 1 to 12As shown, the tire tread structure includes a strip-shaped protrusion 1, at least two groups of transverse groove groups 2 and a plurality of longitudinal grooves 3. The strip-shaped protrusion 1 is arranged on the tread of the tire and is arranged in a ring shape. At least two groups of transverse groove groups 2 are arranged at intervals along the width direction of the tire. Each transverse groove group 2 includes a plurality of transverse grooves, and the plurality of transverse grooves are arranged at intervals along the circumference of the tire. In two adjacent transverse groove groups 2, the plurality of transverse grooves in one transverse groove group 2 are arranged one-to-one with the plurality of transverse grooves in the other transverse groove group 2, and the transverse grooves and the corresponding transverse grooves are arranged at a first angle A1. The plurality of longitudinal grooves 3 are arranged at intervals along the width direction of the tire, and the longitudinal grooves 3 extend along the circumference of the tire and penetrate the transverse grooves. The longitudinal grooves 3 and the transverse grooves divide the tread into a plurality of pattern blocks 4, and the pattern blocks 4 are provided with a sheet structure 5.

[0062] According to the technical solution of this embodiment, the strip-shaped protrusion 1 of the tire tread structure is arranged on the tread of the tire, and the strip-shaped protrusion 1 is arranged in a ring shape. At least two groups of transverse groove groups 2 are arranged at intervals along the width direction of the tire. Each transverse groove group 2 includes a plurality of transverse grooves, and the plurality of transverse grooves are arranged at intervals along the circumference of the tire. In two adjacent transverse groove groups 2, the plurality of transverse grooves in one transverse groove group 2 are arranged one-to-one with the plurality of transverse grooves in the other transverse groove group 2, and the transverse grooves and the corresponding transverse grooves are arranged at a first angle A1. The plurality of longitudinal grooves 3 are arranged at intervals along the width direction of the tire, and the longitudinal grooves 3 extend along the circumference of the tire and penetrate the transverse grooves. Among them, the longitudinal grooves 3 and the transverse grooves divide the tread into a plurality of pattern blocks 4, and the pattern blocks 4 are provided with a sheet structure 5. In this way, the strip-shaped protrusions 1 arranged on the outer surface of the tread can actually form a "dark pattern" structure, thereby increasing the tread roughness of the tire, and then comprehensively improving the tire's grip performance under different road conditions (snow, wet roads and dry land), which helps to initially improve the tire's handling performance under different road conditions, and the above-mentioned arrangement of the transverse groove group 2 and the transverse grooves actually forms a "V"-shaped single-guide pattern on the tread, which can improve the tire's drainage and snow discharge performance while allowing the tire to "bite" the ground during driving, further improving the tire's grip performance and reducing slipping. At the same time, the sheet structure 5 arranged in the pattern block 4 can cut the snow surface or water film to avoid the formation of a complete medium film between the tread and the running surface, which leads to a decrease in the friction coefficient of the tread, and further improves the grip performance of the tire. The above three designs interact and complement each other, greatly increasing the interaction force between the tread and the running surface, ensuring that the tire has high handling performance under different road conditions, thereby solving the problem of poor handling performance of snow tires in dry and wet road conditions in the prior art, and improving the driving safety of users.

[0063] Specifically, there are multiple sheet structures 5 on each pattern block 4, and the multiple sheet structures 5 are arranged at intervals along the circumference of the tire, so that the sheet structures 5 can improve the cutting area of ​​the sheet structures 5 while making good balance on the rigidity of the pattern blocks 4.

[0064] In this embodiment, the distance between two adjacent sheet structures 5 is 8 mm to 9 mm.

[0065] Optionally, one end of the transverse groove away from the center plane S of the tire is connected to the side of the tire; and / or, the transverse groove group 2 is divided into two groups, and the end of the transverse groove in one transverse groove group 2 away from the side is located between the two transverse grooves of the other transverse groove group 2. In this way, the above arrangement, on the one hand, enables the water and snow in the transverse grooves and longitudinal grooves 3 to move to the ends of the transverse grooves during the rolling process of the tire, and finally be discharged to the side of the tire (outside the tire), further improving the tire's drainage and snow discharge performance; on the other hand, the "V"-shaped transverse grooves adopt a staggered through design, and the single-guide pattern butterfly mark at the center plane S of the tire is optimized to a partially circular mark, further improving the tire's wetland drainage performance.

[0066] In this example, the tire pattern structure on both sides of the center plane S of the tire is actually staggered (i.e. Figure 1 As shown in the figure, by translating the pattern structure on either side upward or downward by a certain distance, a symmetrical pattern structure can be generated). This staggered design can optimize the tire footprint and improve the wetland drainage performance of the tire.

[0067] like Figures 1 to 3 As shown, the sheet structure 5 includes a plurality of interconnected straight segments 51 and a plurality of inclined segments 52, wherein the inclined segment 52 is located between two adjacent straight segments 51. The inclined segment 52 is arranged at a second angle A2 with the straight segment 51 so that the distance between two adjacent inclined segments 52 gradually increases. In this way, the above-mentioned design of the sheet structure 5 can form a 3D structural steel sheet to further increase the cutting area of ​​the sheet structure 5, improve the tire's grip performance and water film cutting ability, and also help improve the tire's performance in steering actions such as turning, acceleration and braking. At the same time, compared with the traditional "Z"-shaped steel sheet, the straight segment 51 in this embodiment can form a trapezoidal structure with two adjacent inclined segments 52 to avoid the corner being too sharp, thereby extending the service life of the sheet structure 5.

[0068] Specifically, the sheet structure 5 is a steel sheet.

[0069] Specifically, at temperatures close to 0°C or lower or in slippery road conditions, a layer of ice or water film is easily formed between the snowy or flooded road surface and the tire, which can seriously hinder the tire's grip. The setting of the steel sheet can cut off this layer of ice or water film like a micro blade, and absorb residual moisture through the grooves on its surface and the internal groove gaps, so that the contact surface between the tire and the ground remains dry, thereby increasing the tread friction.

[0070] Specifically, when turning, the sheet-like structure 5 of the shoulder portion can provide additional support to help the vehicle maintain a stable driving posture. When braking, the tortuous sheet-like structure 5 can more effectively transmit the braking force to the ground, shorten the braking distance and improve the braking performance.

[0071] Specifically, ordinary snow tire steel sheets are usually arranged in a Z-shaped or wavy steel sheet, which will produce multiple small-angle sharp corners. The design of the sheet structure 5 in this example can eliminate such sharp corners and increase the contact area between the tire and the ground.

[0072] Specifically, the above arrangement of the sheet structure 5 also helps to disperse the force on the pattern block 4, so that the wear degree of the pattern block 4 is more uniform, thereby extending the service life of the tire.

[0073] like Figure 1 and Figure 3 As shown, a plurality of longitudinal grooves 3 separate the tread into two shoulder pattern portions 6 and an intermediate pattern portion located between the two shoulder pattern portions 6. The transverse groove located in the shoulder pattern portion 6 is a shoulder transverse groove 21. The shoulder transverse groove 21 includes a first sub-transverse groove 211 and a second sub-transverse groove 212 that are interconnected. One end of the first sub-transverse groove 211 away from the second sub-transverse groove 212 is connected to the side of the tire. The first sub-transverse groove 211 extends along the width direction of the tire, and the extension direction of the second sub-transverse groove 212 is arranged at a third angle A3 with the width direction of the tire. The third angle A3 satisfies: 0°<A3≤15°; the shoulder transverse groove 21 has a length L1, and the first sub-transverse groove 211 has a length L2. The length L1 and the length L2 satisfy: 0.3L1≤L2≤0.4L1.

[0074] In this way, when the inclination angle of the shoulder transverse groove 21 is designed to be too large, the edge angle of the pattern block 4 will be too sharp, the overall rigidity of the pattern block 4 located in the shoulder pattern portion 6 will be weak, the sharp edge of the pattern block 4 will be seriously damaged during the driving of the vehicle, and the tire will have poor grip when turning. In order to avoid such problems, the above-mentioned shoulder transverse groove 21 is designed to increase the contact area between the shoulder and the snow, especially when turning or under lateral force, which helps to improve the lateral grip of the tire and reduce the risk of skidding. At the same time, in addition to enhancing the grip performance on snow, the drainage of the shoulder is also equally important. The smaller transverse groove angle (i.e., the above-mentioned design of A3) helps to quickly remove water or snow from the tire during driving on snow, and maintain effective contact between the tire and the ground.

[0075] Optionally, the third angle A3 satisfies: 4°<A3≤6°.

[0076] like Figure 1 and Figure 2 As shown, the middle pattern portion includes a center pattern portion 7 and a crown pattern portion 8, at least a portion of the center pattern portion 7 coincides with the center plane S of the tire, the crown pattern portion 8 is located between the center pattern portion 7 and the shoulder pattern portion 6, the transverse grooves located in the crown pattern portion 8 are crown transverse grooves 22, the crown transverse grooves 22 include a third sub-transverse groove 221, a fourth sub-transverse groove 222 and a fifth sub-transverse groove 223 which are interconnected, the fourth sub-transverse groove 222 is located between the third sub-transverse groove 221 and the fifth sub-transverse groove 223, and the third sub-transverse groove 221 is arranged away from the center plane S of the tire relative to the fifth sub-transverse groove 223. Among them, the extension direction of the third sub-lateral groove 221 is set at a fourth angle A4 with the width direction of the tire, and the extension direction of the fifth sub-lateral groove 223 is set at a fifth angle A5 with the width direction of the tire, and the fourth angle A4 and the fifth angle A5 satisfy: 15°<A4≤30°, 25°≤A5≤50°. The lateral groove located in the central pattern portion 7 is the central lateral groove 23, and the central lateral groove 23 is set at a sixth angle A6 with the width direction of the tire, and the sixth angle A6 satisfies: 25°≤A6≤50°.

[0077] In this way, the above arrangement helps to quickly drain water and snow from the contact area between the tread and the ground when the vehicle is driving at high speed or encounters deep water and snow, reducing the water film effect and improving the wet handling and safety of the tire. In addition, the larger middle lateral groove angle (i.e. the above arrangement of A4, A5 and A6) can also improve the handling performance of the tire to a certain extent. Through the above reasonable lateral groove layout and angle design, the tire can maintain relatively stable handling characteristics at different speeds, reducing safety hazards caused by tire slippage or loss of control.

[0078] Optionally, the fourth angle A4, the fifth angle A5 and the sixth angle A6 satisfy: 18°<A4≤23°, 28°≤A5≤32°, 26°≤A6≤32°.

[0079] like Figure 1 and Figure 3 As shown, the fourth sub-lateral groove 222 is arranged at a fourteenth angle A14 with respect to the circumference of the tire, and the fourteenth angle A14 is 16°. Thus, the above arrangement increases the contact area between the tire and the ground, helps to increase the adhesion of the tire, and makes the tire more stable when driving in snow.

[0080] like Figure 1 and Figure 3 As shown, along the direction from the side of the tire to the center plane of the tire, the width of at least part of the shoulder transverse groove 21 gradually increases; and / or, the width of at least part of the crown transverse groove 22 gradually increases; and / or, the width of the center transverse groove 23 gradually increases. In this way, along the direction from the center plane S of the tire to the side of the tire, the above-mentioned arrangement makes the width of the transverse groove gradually increase to form a "trumpet-mouth" structure, so that snow or water can enter from the narrow side more effectively when the tire rolls, and then be discharged from the wide side. As the width of the transverse groove increases, its drainage and snow discharge area also increases accordingly, so that when the tire is running on a slippery and snowy road, it can discharge the accumulated water or snow between the tread and the ground more quickly, further reducing the influence of the water film effect on the tire's grip.

[0081] Optionally, there is a first angle difference A7 between the extension direction of one groove wall of the second sub-transverse groove 212 and the extension direction of the other groove wall, so that the width of the second sub-transverse groove 212 gradually increases, and the first angle difference A7 satisfies: 1°≤A7≤3°; and / or, there is a second angle difference A8 between the extension direction of one groove wall of the third sub-transverse groove 221 and the extension direction of the other groove wall, so that the width of the third sub-transverse groove 221 gradually increases, and the second angle difference A8 satisfies: 1°≤A8≤3° ; and / or, there is a third angle difference A9 between the extension direction of one groove wall of the fifth sub-transverse groove 223 and the extension direction of the other groove wall, so that the width of the fifth sub-transverse groove 223 gradually increases, and the third angle difference A9 satisfies: 2°≤A9≤4°; and / or, there is a fourth angle difference A10 between the extension direction of one groove wall of the central transverse groove 23 and the extension direction of the other groove wall, so that the width of the central transverse groove 23 gradually increases, and the fourth angle difference A10 satisfies: 4°≤A10≤6°. In this way, the above-mentioned setting makes the width increase of the second sub-transverse groove 212, the third sub-transverse groove 221, the fifth sub-transverse groove 223 and the central transverse groove 23 more appropriate, so as to further improve the discharge speed of accumulated water or snow, and ensure that the tire has good handling performance under different road conditions.

[0082] Specifically, the extension direction of one groove wall of the second sub-lateral groove 212 is set at a fifteenth angle A71 with the width direction of the tire, and the extension direction of the other groove wall is set at a sixteenth angle A72 with the width direction of the tire. The value ranges of the fifteenth angle A71 and the sixteenth angle A72 are consistent with the third angle A3, but there is a first angle difference A7 between their specific values.

[0083] Specifically, the extension direction of one groove wall of the third sub-lateral groove 221 is set at a seventeenth angle A81 with the width direction of the tire, and the extension direction of the other groove wall is set at an eighteenth angle A82 with the width direction of the tire. The value ranges of the seventeenth angle A81 and the eighteenth angle A82 are consistent with the fourth angle A4, but there is a second angle difference A8 between their specific values.

[0084] Specifically, the extension direction of one groove wall of the fifth sub-lateral groove 223 is set at a nineteenth angle A91 with the width direction of the tire, and the extension direction of the other groove wall is set at a twentieth angle A92 with the width direction of the tire. The value ranges of the nineteenth angle A91 and the twentieth angle A92 are consistent with the fifth angle A5, but there is a third angle difference A9 between their specific values.

[0085] Specifically, the extension direction of one groove wall of the central transverse groove 23 is set at a twenty-first angle A101 with the width direction of the tire, and the extension direction of the other groove wall is set at a twenty-second angle A102 with the width direction of the tire. The value ranges of the twenty-first angle A101 and the twenty-second angle A102 are consistent with the sixth angle A6, but there is a fourth angle difference A10 between their specific values.

[0086] like Figures 5 to 7As shown, the sheet structure 5 located in the middle pattern portion is a first sheet structure 53, and the first sheet structure 53 has N first accommodating recesses 531. N first matching protrusions are arranged on the bottom of the groove portion for accommodating the first sheet structure 53, and at least part of the first matching protrusions are located in the first accommodating recess 531 and are limited and stopped by the inner wall of the first accommodating recess 531. Wherein, N satisfies: L-15mm≤N·15mm<L, N is a natural number, and L is the length of the first sheet structure 53. When N is greater than or equal to 2, the N first accommodating recesses 531 are arranged at intervals along the length direction of the first sheet structure 53, and the N first matching protrusions and the N first accommodating recesses 531 are arranged one by one. In this way, while the first accommodating recess 531 cooperates with the first matching protrusion to improve the assembly stability of the first sheet structure 53, the above-mentioned arrangement enables the specific structure of the first sheet structure 53 (the number of first accommodating recesses 531) to be adjusted accordingly according to the length of the first sheet structure 53 to ensure that the first sheet structure 53 can maintain the rigidity balance of each pattern block 4, thereby increasing the mutual friction between the first sheet structures 53, reducing the tread deformation during the tire's driving and turning, and greatly improving the tire's steering stability and handling stability.

[0087] In this embodiment, the overall extension direction of the first sheet structure 53 is set at 30° with the width direction of the tire.

[0088] Table 1

[0089]

[0090] It can be seen that after simulation optimization and comparison, when the overall extension direction of the first sheet structure 53 is set at 30° to the width direction of the tire, it is more compatible with the pattern style and formula rubber, and has better comfort and wet performance.

[0091] like Figure 8As shown, the sheet structure 5 located on the shoulder pattern portion 6 is a second sheet structure 54, which includes a main body 541 and an extension 543 connected to each other, the main body 541 having a second accommodating recess 542, a second matching protrusion is arranged on the bottom of the groove portion for accommodating the second sheet structure 54, at least part of the second matching protrusion is located in the second accommodating recess 542, and is limited by the inner wall of the second accommodating recess 542; wherein, at least part of the extension 543 is arranged in an arc shape, and the extension 543 is located on the side of the main body 541 away from the center plane S of the tire. In this way, while the assembly stability of the second sheet structure 54 is improved through the mutual cooperation between the second accommodating recess 542 and the second matching protrusion, and its effect is stably exerted, the above-mentioned arrangement of the main body 541 and the extension 543 enables the structure of the second sheet structure 54 to match the structure of the shoulder portion, further improving its effect of cutting the water film.

[0092] like Figure 1 , Figure 3 and Fig. 9 As shown, the strip protrusions 1 are multiple groups, and in one group of strip protrusions 1, multiple strip protrusions 1 are sequentially arranged, and the strip protrusions 1 are arranged in an arc shape away from the upper surface of the tread; and / or the height H1 of the strip protrusions 1 satisfies: 0.3mm≤H1≤1mm. In this way, the above arrangement further increases the surface roughness of the tread (multiple strip protrusions are sequentially arranged); on the other hand, it helps to extend the service life of the strip protrusions.

[0093] In this embodiment, the height H1 of the strip protrusion 1 is 0.3 mm.

[0094] Specifically, the height setting of the strip protrusion 1 can prevent it from causing adverse effects such as excessive deformation and falling off during driving, and the upper surface of the strip protrusion 1 with a full arc design provides a buffering effect for the protrusion during driving, preventing deformation and falling off, and greatly extending the service life of the strip protrusion 1.

[0095] In this example, the distance between two adjacent strip-shaped protrusions 1 is 1 mm.

[0096] Specifically, the special pattern of the strip protrusion 1 and the trapezoidal serrated sheet structure 5 can comprehensively improve the surface roughness of the pattern block 4, increase the friction area and friction coefficient when the tire contacts the ground, and help provide better traction and braking force on icy and snowy roads. This design can cut off this layer of water film and absorb or discharge the water film through the pressure shock wave generated by the combined action of the edge of the strip protrusion 1, the edge of the pattern block 4 and the microscopic rough surface of the road surface, so that the contact surface always remains dry, thereby improving the tire's grip on icy and snowy roads.

[0097] In this embodiment, a plurality of strip-shaped protrusions 1 which are arranged in sequence are designed in a "U" shape, or a "triangle" design, or an "L" shape design, so as to improve the overall aesthetics of the tire.

[0098] like Figure 1 , Figure 3 and Figure 4 As shown, the tire tread structure also includes a first recess 9, which is arranged on the pattern block 4, one end of the first recess 9 is located in the pattern block 4, and the other end of the first recess 9 extends to the side of the pattern block 4 to communicate with the longitudinal groove 3 and / or the transverse groove. The first recess 9 includes a first sub-recess 91 and a second sub-recess 92 that are connected to each other, and the first sub-recess 91 extends to the side of the pattern block 4. In the direction from the first sub-recess 91 to the second sub-recess 92, the depth of at least part of the first sub-recess 91 gradually increases, and the depth of at least part of the second sub-recess 92 gradually increases. The maximum depth G1max of the first sub-recess 91 and the maximum depth G2max of the second sub-recess 92 meet: 4mm≤G1max≤5mm, 1mm≤G2max≤2mm. In this way, the above arrangement can, on the one hand, discharge turbulent airflow from the opening of the transverse groove close to the tread through the gradually changing bottom surface of the recess, so as to reduce the noise of the tire during driving; on the other hand, it can effectively cushion the impact of the tire with the ground during driving, further reduce the tire driving noise, and improve the tire driving stability and comfort.

[0099] In this example, a large number of cut corners (chamfered angles) are provided at the edges and corners of the pattern block 4 to prevent the top corners of the pattern block 4 from being too sharp, thereby reducing the possibility of wear and tear of the pattern block 4 and further extending the service life of the tire.

[0100] In this embodiment, the first recess 9 in the central pattern portion 7 is a central recess 93, which is connected to the longitudinal groove 3, and the width of the first sub-recess 91 of the central recess 93 is greater than the width of the second sub-recess 92 thereof. The first recess 9 in the crown pattern portion 8 is a crown recess 94, at least one crown recess 94 is connected to the longitudinal groove 3, and at least another crown recess 94 is connected to the transverse groove. The crown recess 94 connected to the longitudinal groove 3 is arranged opposite to the central recess 93.

[0101] In this example, the tire tread structure also includes: a second recess 10 is provided on the side of the pattern block 4 located in the shoulder pattern portion 6, the second recess 10 is located in the transverse groove and extends to the tread. A third recess 11 is provided on the side of the pattern block 4 located in the shoulder pattern portion 6, the third recess 11 is located in the longitudinal groove 3 and extends to the tread. Among them, the transverse groove located in the shoulder pattern portion 6 has a length L3, the pattern block 4 located in the shoulder pattern portion 6 has a length L4, the length L5 of the second recess 10 satisfies the length L3: 0.5L4≤L5≤0.7L4; the length L6 of the third recess 11 satisfies the length L4: 0.3L4≤L6≤0.4L4.

[0102] In this embodiment, the second recess 10 and the third recess 11 form a step-like structure on the side of the pattern block 4 to effectively cushion the impact of the tire with the ground during driving, reduce tire driving noise, and improve tire driving stability and comfort.

[0103] like Figure 10 As described above, in this embodiment, the third recess 11 actually includes two sub-recesses that are interconnected along the depth direction of the longitudinal groove 3 (from the tread surface to the bottom of the longitudinal groove 3) to form a double-step structure.

[0104] In this embodiment, a pattern group 12 is formed between the pattern blocks 4 located between at least three adjacent transverse grooves. There are multiple pattern groups 12, and the multiple pattern groups 12 include a first pattern group, a second pattern group, and a third pattern group. The pitch size of the first pattern group, the pitch size of the second pattern group, and the pitch size of the third pattern group are different. In this way, the above-mentioned setting makes the tire tread structure adopt a multi-unequal pitch design as a whole, so that the pattern structure is more complex, greatly reducing the driving noise of the tire and improving the driving comfort of the user. At the same time, for a single group of pattern groups, it also adopts an internal multi-pitch design (a pattern group 12 is formed between the pattern blocks 4 located between at least three adjacent transverse grooves), which further reduces the driving noise of the tire.

[0105] In this embodiment, the first pattern group has a pitch P1, the second pattern group has a pitch P2, and the third pattern group has a pitch P3.

[0106] A pattern group 12 is formed between the pattern blocks 4 located between three adjacent transverse grooves, that is, a pattern group 12 is formed between two groups of adjacent pattern blocks 4. As for the overall pitch of the tread, a double pitch design is also adopted in a single pitch unit to further reduce the driving noise of the tire.

[0107] like Figure 1 , Figure 3 and Fig.12As shown, the tire tread structure also includes: a fourth recess 13, which is arranged on the pattern block 4 located in the shoulder pattern portion 6, the fourth recess 13 is located on the side of the sheet structure 5 away from the center plane of the tire, one end of the fourth recess 13 is located in the pattern block 4, and the other end of the fourth recess 13 extends to the side of the pattern block 4 to form a connecting port connected to the transverse groove; a sawtooth protrusion 15, which is arranged on the bottom wall of the fourth recess 13; wherein, in a set of pattern groups 12, the connecting ports of the fourth recess 13 on the pattern blocks 4 located in the shoulder pattern portion 6 of two adjacent ones are arranged oppositely. In this way, the above arrangement helps to quickly discharge the snow accumulated on the shoulder portion, so as to further improve the snow discharge performance of the tire.

[0108] Optionally, the sawtooth protrusion 15 includes a plurality of sawtooth structures arranged along the extension direction of the fourth recess 13, the outer surface of the sawtooth structure has a first plane 151 and a second plane 152 connected to each other, the first plane 151 is arranged at an eleventh angle A11 with the bottom wall of the fourth recess 13, the second plane 152 is arranged at a twelfth angle A12 with the bottom wall of the fourth recess 13, the eleventh angle A11 and the twelfth angle A12 satisfy: 70°≤A11≤90°, 10°≤A12≤30°, and the second plane 152 is arranged opposite to the connecting port. Among them, the depth G3 of the fourth recess 13 satisfies: 0.5mm≤G3≤2mm, the width W1 of the fourth recess 13 satisfies 1.5mm: ≤W1≤5.5mm, and the height H2 of the sawtooth structure satisfies: 0.4mm≤H2≤0.6mm.

[0109] Specifically, Fig.12 As shown, the cross-sectional shape of the serrated protrusion 15 is similar to the barbed serrations on the tentacles of insects, so as to effectively remove snow from the shoulder of the tire, especially when driving in deep snow or water. When the snow and water submerge the tread and cover the shoulder of the tire, the snow and water will be quickly removed along the inclined surface of the serrations, thereby providing a certain snow removal capacity under the shoulder, further improving the driving performance of the tire in snow and wetlands.

[0110] like Figure 1 and 3 As shown, the contact surface between the tread and the driving surface has a width B, and both sides of the center plane S of the tire are provided with: a first longitudinal groove 31 and a second longitudinal groove 32 arranged in sequence from the side of the tire to the center plane S, and the width W2 of the first longitudinal groove 31, the width W3 of the second longitudinal groove 32 and the width B satisfy: 0.03B≤W2≤0.05B, 0.01B≤W3≤0.03B; and / or, the tread has an area S1, the pattern block 4 has an area S2, and the area S1 and the area S2 satisfy: 0.25S1≤S2≤0.4S1.

[0111] Optionally, the width W2 of the first longitudinal groove 31 and the width W3 of the second longitudinal groove 32 satisfy: 7 mm ≤ W2 ≤ 12 mm, 3 mm ≤ W3 ≤ 8 mm.

[0112] Preferably, the width W2 of the first longitudinal groove 31 satisfies: 9.5 mm≤W2≤10 mm.

[0113] Specifically, in the grooves of the entire tread pattern (longitudinal grooves 3 and transverse grooves), the above arrangement makes the area of ​​the longitudinal grooves 3 relatively appropriate relative to the entire pattern grooves. When the tire is in the process of driving, if the width of the longitudinal grooves 3 is designed to be too narrow, the volume of snow removed from the circumferential direction of the tread will be too small, which is not conducive to improving the snow performance. If the width of the longitudinal grooves 3 is designed to be too large, although the snow performance is improved, due to the excessive width, the area of ​​the pattern blocks 4 becomes narrower, the rigidity becomes weaker, the handling performance is reduced, and it may also change the vibration frequency when the tire contacts the road surface, making it easier to excite and amplify vibrations of certain frequencies, forming resonance. The resonance phenomenon will aggravate the generation of tire noise, causing the driver and passengers to feel stronger noise interference. Therefore, the first longitudinal grooves 31 and the second longitudinal grooves 32 designed in this embodiment can improve the snow removal performance of the tire in a relatively balanced manner and ensure that the driving noise of the tire is low.

[0114] In this example, the second longitudinal groove 32 is a linear groove, and the width W2 of the first longitudinal groove 31 gradually increases along the circumference of the tire. There is a fifth angle difference A13 between the extension direction of the first groove wall of the first longitudinal groove 31 and the extension direction of the other groove wall, and the fifth angle difference A13 satisfies: 0°<A13≤5°. In this way, the above setting makes the width of the first longitudinal groove 31 gradually increase, so as to increase the flow speed of snow or water in the first longitudinal groove 31, and further improve the drainage and snow removal performance of the tire.

[0115] Table 2

[0116]

[0117] In this embodiment, the width W2 of the first longitudinal groove 31 is 9.5 mm, and the width W3 of the second longitudinal groove 32 is 5 mm.

[0118] Specifically, the above simulation optimization comparison shows that the values ​​of W2 and W3 in this embodiment are the optimal solution, so as to ensure that the tire has a high snow removal performance while also making the tire have good comfort. Although the continuous increase of W2 and W3 can continuously improve the snow removal performance, it can be seen from Table 2 that its comfort performance is gradually decreasing. In fact, the continuous increase of W2 and W3 also means that the contact area between the tire and the driving surface is decreasing, and the tire's grip performance, braking performance, etc. will also be adversely affected.

[0119] Specifically, the groove wall of the first longitudinal groove 31 in this embodiment also adopts an asymmetric design, so that the first longitudinal groove 31 forms a gradual width design by adjusting the angle between the groove wall surface and the center plane S of the tire, so as to increase the flow speed of snow or water in the first longitudinal groove 31.

[0120] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0121] The strip-shaped protrusions of the tire tread structure are arranged on the tread of the tire, and the strip-shaped protrusions are arranged in a ring shape. At least two groups of transverse grooves are arranged at intervals along the width direction of the tire, and each transverse groove group includes a plurality of transverse grooves, and the plurality of transverse grooves are arranged at intervals along the circumference of the tire. In two adjacent transverse groove groups, the plurality of transverse grooves in one transverse groove group are arranged one-to-one with the plurality of transverse grooves in the other transverse groove group, and the transverse grooves and the corresponding transverse grooves are arranged at a first angle A1, and the plurality of longitudinal grooves are arranged at intervals along the width direction of the tire, and the longitudinal grooves extend along the circumference of the tire and penetrate the transverse grooves. Among them, the longitudinal grooves and the transverse grooves divide the tread into a plurality of pattern blocks, and a sheet structure is arranged in the pattern block. In this way, the strip-shaped protrusions arranged on the outer surface of the tread can actually form a "dark pattern" structure, thereby increasing the tread roughness of the tire, and then comprehensively improving the tire's grip performance under different road conditions (snow, wet roads and dry land), which helps to initially improve the tire's handling performance under different road conditions, and the above-mentioned arrangement of the transverse groove group and the transverse groove actually forms a "V"-shaped single guide pattern on the tread, which can improve the tire's drainage and snow discharge performance while allowing the tire to "bite" the ground during driving, further improving the tire's grip performance and reducing slipping. At the same time, the sheet structure arranged in the pattern block can cut the snow surface or water film to avoid the formation of a complete medium film between the tread and the driving surface, which leads to a decrease in the friction coefficient of the tread, further improving the grip performance of the tire. The above three designs interact and complement each other, greatly increasing the interaction force between the tread and the driving surface, ensuring that the tire has high handling performance under different road conditions, thereby solving the problem of poor handling performance of snow tires in dry and wet road conditions in the prior art, and improving the driving safety of users.

[0122] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0123] 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.

[0124] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0125] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tire tread structure, characterized in that: include: A strip-shaped protrusion (1) is arranged on the tread of the tire, and the strip-shaped protrusion (1) is arranged in a ring shape; At least two groups of transverse groove groups (2) are arranged at intervals along the width direction of the tire, each of the transverse groove groups (2) comprises a plurality of transverse grooves, and the plurality of transverse grooves are arranged at intervals along the circumferential direction of the tire; in two adjacent transverse groove groups (2), the plurality of transverse grooves in one transverse groove group (2) are arranged one-to-one with the plurality of transverse grooves in the other transverse groove group (2), and the transverse grooves and the corresponding transverse grooves are arranged at a first angle A1; A plurality of longitudinal grooves (3) are arranged at intervals along the width direction of the tire, and the longitudinal grooves (3) extend along the circumference of the tire and penetrate the transverse grooves; wherein the longitudinal grooves (3) and the transverse grooves divide the tread into a plurality of pattern blocks (4), and a sheet structure (5) is arranged in the pattern block (4).

2. The tire tread structure according to claim 1, characterized in that: One end of the transverse groove away from the center plane S of the tire is connected to the side of the tire; and / or, There are two groups of transverse groove groups (2), and the end of the transverse groove in one group of transverse groove groups (2) away from the side portion is located between two transverse grooves in the other group of transverse groove groups (2).

3. The tire tread structure according to claim 1, characterized in that: The sheet-like structure (5) comprises a plurality of mutually connected straight segments (51) and a plurality of inclined segments (52), wherein the inclined segment (52) is located between two adjacent straight segments (51); The inclined section (52) and the straight section (51) are arranged at a second angle A2, so that the distance between two adjacent inclined sections (52) gradually increases.

4. The tire tread structure according to claim 1 or 3, characterized in that: The plurality of longitudinal grooves (3) divide the tread into two shoulder pattern portions (6) and an intermediate pattern portion located between the two shoulder pattern portions (6); the transverse grooves located in the shoulder pattern portions (6) are shoulder transverse grooves (21). The shoulder transverse groove (21) comprises a first sub-transverse groove (211) and a second sub-transverse groove (212) which are connected to each other, wherein one end of the first sub-transverse groove (211) away from the second sub-transverse groove (212) is connected to the side of the tire; The first sub-transverse groove (211) extends along the width direction of the tire, and the extension direction of the second sub-transverse groove (212) forms a third angle A3 with the width direction of the tire, and the third angle A3 satisfies: 0°<A3≤15°; the shoulder transverse groove (21) has a length L1, and the first sub-transverse groove (211) has a length L2, and the length L1 and the length L2 satisfy: 0.3L1≤L2≤0.4L1.

5. The tire tread structure according to claim 4, characterized in that: The intermediate tread portion comprises a central tread portion (7) and a crown tread portion (8), at least a portion of the central tread portion (7) coincides with a center plane S of the tire, and the crown tread portion (8) is located between the central tread portion (7) and the shoulder tread portion (6). The transverse grooves located in the crown pattern portion (8) are crown transverse grooves (22), the crown transverse grooves (22) comprising a third sub-transverse groove (221), a fourth sub-transverse groove (222) and a fifth sub-transverse groove (223) which are interconnected, the fourth sub-transverse groove (222) being located between the third sub-transverse groove (221) and the fifth sub-transverse groove (223), the third sub-transverse groove (221) being arranged away from the center plane S of the tire relative to the fifth sub-transverse groove (223); The extension direction of the third sub-transverse groove (221) is set at a fourth angle A4 with the width direction of the tire, the extension direction of the fifth sub-transverse groove (223) is set at a fifth angle A5 with the width direction of the tire, and the fourth angle A4 and the fifth angle A5 satisfy: 15°<A4≤30°, 25°≤A5≤50°.

6. The tire tread structure according to claim 5, characterized in that: The transverse groove located in the central tread portion (7) is a central transverse groove (23), and the central transverse groove (23) is arranged at a sixth angle A6 with respect to the width direction of the tire, and the sixth angle A6 satisfies: 25°≤A6≤50°.

7. The tire tread structure according to claim 6, characterized in that: In the direction from the side of the tire to the center plane of the tire, the width of at least part of the shoulder transverse grooves (21) gradually increases; and / or, the width of at least part of the crown transverse grooves (22) gradually increases; and / or, the width of the center transverse grooves (23) gradually increases.

8. The tire tread structure according to claim 7, characterized in that: There is a first angle difference A7 between the extension direction of one groove wall of the second sub-transverse groove (212) and the extension direction of the other groove wall, so that the width of the second sub-transverse groove (212) gradually increases, and the first angle difference A7 satisfies: 1°≤A7≤3°; and / or, There is a second angle difference A8 between the extension direction of one groove wall of the third sub-transverse groove (221) and the extension direction of the other groove wall, so that the width of the third sub-transverse groove (221) gradually increases, and the second angle difference A8 satisfies: 1°≤A8≤3°; and / or, There is a third angle difference A9 between the extension direction of one groove wall of the fifth sub-transverse groove (223) and the extension direction of the other groove wall, so that the width of the fifth sub-transverse groove (223) gradually increases, and the third angle difference A9 satisfies: 2°≤A9≤4°; and / or, There is a fourth angle difference A10 between the extension direction of one groove wall of the central transverse groove (23) and the extension direction of the other groove wall, so that the width of the central transverse groove (23) gradually increases, and the fourth angle difference A10 satisfies: 4°≤A10≤6°.

9. The tire tread structure according to claim 5, characterized in that: The sheet-like structure (5) located in the middle pattern portion is a first sheet-like structure (53), and the first sheet-like structure (53) has N first accommodating recesses (531); N first matching protrusions are arranged on the bottom of the groove portion for accommodating the first sheet-like structure (53), and at least some of the first matching protrusions are located in the first accommodating recess (531) and are limited and stopped by the inner wall of the first accommodating recess (531); Wherein, N satisfies: L-15mm≤N·15mm<L, N is a natural number, L is the length of the first sheet structure (53), and when N is greater than or equal to 2, the N first accommodating recesses (531) are arranged at intervals along the length direction of the first sheet structure (53), and the N first matching protrusions and the N first accommodating recesses (531) are arranged one-to-one.

10. The tire tread structure according to claim 9, characterized in that: The sheet-like structure (5) located on the shoulder pattern portion (6) is a second sheet-like structure (54), the second sheet-like structure (54) comprising a main body (541) and an extension portion (543) connected to each other, the main body (541) having a second accommodating recess (542), a second matching protrusion being arranged on the bottom of a groove portion for accommodating the second sheet-like structure (54), at least a portion of the second matching protrusion being located in the second accommodating recess (542) and being limited in position with the inner wall of the second accommodating recess (542); wherein at least a portion of the extension portion (543) is arranged in an arc shape, and the extension portion (543) is located on a side of the main body (541) away from the center plane S of the tire.

11. The tire tread structure according to claim 1, characterized in that: The strip-shaped protrusions are in groups, and in one group of strip-shaped protrusions, multiple strip-shaped protrusions are arranged in sequence. The strip-shaped protrusion (1) is arranged in an arc shape away from the upper surface of the tread; and / or, The height H1 of the strip-shaped protrusion (1) satisfies: 0.3 mm ≤ H1 ≤ 1 mm.

12. The tire tread structure according to claim 5, characterized in that: The tire tread structure further comprises: A first recess (9) is arranged on the tread block (4), one end of the first recess (9) is located in the tread block (4), and the other end of the first recess (9) extends to the side of the tread block (4) to communicate with the longitudinal groove (3) and / or the transverse groove; The first recess (9) comprises a first sub-recess (91) and a second sub-recess (92) which are interconnected, the first sub-recess (91) extending to the side of the pattern block (4), and in the direction from the first sub-recess (91) to the second sub-recess (92), the depth of at least part of the first sub-recess (91) gradually increases, and the depth of at least part of the second sub-recess (92) gradually increases, and the maximum depth G1max of the first sub-recess (91) and the maximum depth G2max of the second sub-recess (92) satisfy: 4mm≤G1max≤5mm, 1mm≤G2max≤2mm.

13. The tire tread structure according to claim 12, characterized in that: The first recess (9) located in the central pattern portion (7) is a central recess (93), the central recess (93) is connected to the longitudinal groove (3), and the width of the first sub-recess (91) of the central recess (93) is greater than the width of the second sub-recess (92) thereof; The first recess (9) located in the crown pattern portion (8) is a crown recess (94), at least one of the crown recess (94) is connected to the longitudinal groove (3), and at least another of the crown recess (94) is connected to the transverse groove; Wherein, the crown recess (94) and the central recess (93) connected to the longitudinal groove (3) are arranged opposite to each other.

14. The tire tread structure according to claim 12, characterized in that: The tire tread structure further comprises: A second recess (10) is arranged on a side surface of a pattern block (4) located in the shoulder pattern portion (6), wherein the second recess (10) is located in the transverse groove and extends to the tread; A third recess (11) is arranged on a side surface of a pattern block (4) located in the shoulder pattern portion (6), wherein the third recess (11) is located in the longitudinal groove (3) and extends to the tread; The transverse groove in the shoulder tread portion (6) has a length L1, the tread block (4) in the shoulder tread portion (6) has a length L4, the length L5 of the second recess (10) satisfies the following relationship with the length L1: 0.5L1≤L5≤0.7L1; the length L6 of the third recess (11) satisfies the following relationship with the length L4: 0.3L4≤L6≤0.4L4.

15. The tire tread structure according to claim 5, characterized in that: A pattern group (12) is formed between pattern blocks (4) located between at least three adjacent transverse grooves. The pattern groups (12) are multiple, and the multiple pattern groups (12) include a first pattern group, a second pattern group, and a third pattern group. The pitch size of the first pattern group, the pitch size of the second pattern group, and the pitch size of the third pattern group are different.

16. The tire tread structure according to claim 15, characterized in that: The tire tread structure further comprises: A fourth recess (13) is arranged on a tread block (4) located in the shoulder tread portion (6), the fourth recess (13) being located on a side of the sheet-like structure (5) away from the center plane of the tire, one end of the fourth recess (13) being located in the tread block (4), and the other end of the fourth recess (13) extending to a side surface of the tread block (4) to form a communication port communicating with the transverse groove; A sawtooth-shaped protrusion (15) is arranged on the bottom wall of the fourth recess (13); In one pattern group (12), the communication openings of the fourth recessed portions (13) on two adjacent pattern blocks (4) located in the shoulder pattern portion (6) are arranged opposite to each other.

17. The tire tread structure according to claim 16, characterized in that: The sawtooth protrusion (15) comprises a plurality of sawtooth structures arranged along the extension direction of the fourth recess (13); the outer surface of the sawtooth structure comprises a first plane (151) and a second plane (152) connected to each other; the first plane (151) and the bottom wall of the fourth recess (13) are arranged at an eleventh angle A11; the second plane (152) and the bottom wall of the fourth recess (13) are arranged at a twelfth angle A12; the eleventh angle A11 and the twelfth angle A12 satisfy: 70°≤A11≤90°, 10°≤A12≤30°; the second plane (152) is arranged opposite to the communication port; The depth G3 of the fourth concave portion (13) satisfies: 0.5 mm ≤ G3 ≤ 2 mm, the width W1 of the fourth concave portion (13) satisfies: 1.5 mm ≤ W1 ≤ 5.5 mm, and the height H2 of the sawtooth structure satisfies: 0.4 mm ≤ H2 ≤ 0.6mm.

18. The tire tread structure according to claim 1, characterized in that: The contact surface between the tread and the running surface has a width B, Both sides of the center plane S of the tire are provided with: a first longitudinal groove (31) and a second longitudinal groove (32) arranged in sequence along the side of the tire to the center plane S, the width W2 of the first longitudinal groove (31), the width W3 of the second longitudinal groove (32) and the width B satisfying: 0.03B≤W2≤0.05B, 0.01B≤W3≤0.03B; and / or, The tread has an area S1, the pattern block (4) has an area S2, and the area S1 and the area S2 satisfy the following relationship: 0.25S1≤S2≤0.4S1.

19. The tire tread structure according to claim 18, characterized in that: The second longitudinal groove (32) is a linear groove, and the width W2 of the first longitudinal groove (31) gradually increases along the circumference of the tire; There is a fifth angle difference A13 between the extension direction of the first groove wall of the first longitudinal groove (31) and the extension direction of the other groove wall, and the fifth angle difference A13 satisfies: 0°<A13≤5°.

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