Tire tread structure

Abstract

The utility model provides a tire tread structure. The tire tread structure comprises a plurality of longitudinal grooves extending in the circumferential direction of the tire, and the longitudinal grooves are formed in the width direction of the tire at intervals so that the tire tread of the tire can be divided into two tire shoulder pattern parts and a middle pattern part located between the two tire shoulder pattern parts; the plurality of transverse grooves comprise first transverse grooves and communicating grooves; the first transverse groove is formed in the tire shoulder pattern part and comprises a first sub transverse groove and a second sub transverse groove which are communicated with each other, the end, away from the first sub transverse groove, of the second sub transverse groove is communicated with the longitudinal groove, and the depth G1 of the first sub transverse groove is larger than the depth G2 of the second sub transverse groove; the communicating groove is formed in the middle pattern part, and at least part of the communicating groove is arranged in a bent shape; wherein the width W of the transverse groove is larger than or equal to 0.6 mm and smaller than or equal to 1.5 mm. The tire of the new energy automobile effectively solves the problem that in the prior art, the tire of the new energy automobile generates loud noise in the driving process of the automobile.

Description

Technical Field

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

[0002] At present, tires are the only contact parts between vehicles and the driving surface. They have a direct impact on the vehicle's driving performance (such as handling performance, braking performance, comfort performance, driving noise, etc.), especially the pattern structure on the tire tread, which directly determines the relevant performance of the tire.

[0003] However, new energy vehicles, which have become popular, are still using traditional fuel vehicle tires. Compared with traditional fuel vehicles, new energy vehicles use electric motors to replace the engines of traditional fuel vehicles, and the running noise of the motor is much smaller than the running noise of the engine, which causes the noise emitted by the tires during the vehicle's driving to be severely amplified, seriously affecting the driving experience of passengers. Utility Model Content

[0004] The main purpose of the utility model is to provide a tire tread structure to solve the problem in the prior art that tires of new energy vehicles generate relatively loud noise during vehicle driving.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a tire tread structure, comprising: a plurality of longitudinal grooves, each longitudinal groove extending along the circumference of the tire, and the plurality of longitudinal grooves being spaced apart along the width direction of the tire to separate the tire tread into two shoulder pattern portions and an intermediate pattern portion located between the two shoulder pattern portions; a plurality of transverse grooves, comprising a first transverse groove and a connecting groove; the first transverse groove is arranged on the shoulder pattern portion and comprises a first sub-transverse groove and a second sub-transverse groove that are connected to each other, the second sub-transverse groove being arranged close to the longitudinal groove relative to the first sub-transverse groove, the second sub-transverse groove being connected to the longitudinal groove at one end away from the first sub-transverse groove, the depth G1 of the first sub-transverse groove being greater than the depth G2 of the second sub-transverse groove; the connecting groove is arranged on the intermediate pattern portion for connecting the longitudinal grooves located on both sides of the intermediate pattern portion, and at least part of the connecting groove is arranged in a bent shape; wherein, the width W of the transverse groove satisfies: 0.6mm≤W≤1.5mm.

[0006] Furthermore, there are multiple intermediate pattern portions including a central pattern portion, at least part of the central pattern portion coincides with the center plane S of the tire, and the multiple transverse grooves also include: a first pattern structure, a first pattern structure is provided on the central pattern portion, the first pattern structure includes a first transverse groove and a second transverse groove spaced apart along the width direction of the tire, an end of the first transverse groove away from the second transverse groove is connected to the longitudinal groove located on one side of the central pattern portion, and an end of the second transverse groove away from the first transverse groove is connected to the longitudinal groove located on the other side of the central pattern portion.

[0007] Furthermore, the second transverse groove includes a straight segment and a bent segment that are interconnected, and the bent segment is arranged close to the first transverse groove relative to the straight segment; wherein, the straight segment is arranged at a first angle A1 with the width direction of the tire, and the extension direction of the first transverse groove is arranged at a second angle A2 with the width direction of the tire, and the first angle A1 and the second angle A2 satisfy: 28°≤A1≤32°, 28°≤A2≤32°.

[0008] Furthermore, along the direction from the second transverse groove to the first transverse groove, the second transverse groove includes a first sub-transverse groove, a second sub-transverse groove and a third sub-transverse groove that are connected in sequence, and the depth G8 of the first sub-transverse groove, the depth G9 of the second sub-transverse groove and the depth G10 of the third sub-transverse groove satisfy: 0.4G9≤G8≤0.6G9, 0.4G9≤G10≤0.6G9.

[0009] Furthermore, there are multiple first pattern structures, and the multiple first pattern structures are arranged at intervals along the circumference of the tire. The tire tread structure also includes: a first pattern group, including two adjacent first pattern structures; wherein, within a group of first pattern groups, a straight segment of a first pattern structure and a first transverse groove of another first pattern structure are connected to the longitudinal groove located on one side of the central pattern portion, and the bent sections of the two first pattern structures are bent toward each other.

[0010] Furthermore, the plurality of intermediate tread portions further include a crown pattern portion located between the center pattern portion and the shoulder pattern portion, the crown pattern portion arranged close to the outer side of the tire is the outer crown pattern portion, the outer crown pattern portion is provided with a plurality of first pattern structures, the plurality of first pattern structures are arranged at intervals along the circumference of the tire, the plurality of transverse grooves further include: a second pattern structure located between two adjacent first pattern structures, the second pattern structure includes a third transverse groove and a fourth transverse groove arranged at intervals along the width direction of the tire, the third transverse groove is away from one end of the fourth transverse groove and the position The longitudinal groove on one side of the outer crown pattern portion is connected, and the fourth transverse groove is connected to the longitudinal groove on the other side of the outer crown pattern portion at one end away from the third transverse groove, and the ends of the third transverse groove and the fourth transverse groove close to each other are bent to form a bent end; wherein, a second pattern group is formed between the second pattern structure and a first pattern structure adjacent to it, and in a group of second pattern groups, the bent end of the third transverse groove and the bent section of the first pattern structure are bent toward each other, and the bent end of the fourth transverse groove is bent toward the side away from the first pattern structure.

[0011] Furthermore, the extension direction of the straight end of the third transverse groove is set at a third angle A3 with the width direction of the tire, and the extension direction of the straight end of the fourth transverse groove is set at a fourth angle A4 with the width direction of the tire. The third angle A3 and the fourth angle A4 satisfy: 32°≤A3≤38°, 32°≤A4≤38.

[0012] Furthermore, the second pattern group also includes: a first recess, which, in a group of second pattern groups, is arranged on the side of the fourth transverse groove away from the first pattern structure; wherein the first recess is arranged in a polygonal shape; and a separating groove, which is arranged between the bent end of the fourth transverse groove and the first recess.

[0013] Furthermore, the crown pattern portion arranged near the inner side of the tire is the inner crown pattern portion, and the connecting grooves are arranged on the inner crown pattern portion. There are multiple connecting grooves, and the multiple connecting grooves are arranged at intervals along the circumference of the tire. The multiple transverse grooves also include: a third pattern structure, located between two adjacent connecting grooves, the third pattern structure includes a fifth transverse groove and a sixth transverse groove arranged at intervals along the width direction of the tire, the fifth transverse groove is connected to the longitudinal groove on one side of the inner crown pattern portion at one end away from the sixth transverse groove, and the sixth transverse groove is connected to the longitudinal groove on the other side of the inner crown pattern portion at one end away from the fifth transverse groove; wherein the fifth transverse groove is arc-shaped; and / or the sixth transverse groove is arc-shaped.

[0014] Furthermore, the fifth transverse groove and the sixth transverse groove are both arranged in an arc shape; wherein, the extension direction of the third pattern structure and the width direction of the tire form a fifth angle A5, and the extension direction of the connecting groove and the width direction of the tire form a sixth angle A6, and the fifth angle A5 and the sixth angle A6 satisfy: 38°≤A5≤42°, 38°≤A6≤42°.

[0015] Furthermore, the tire tread structure also includes: a structural reinforcement protrusion, which is arranged on the bottom of the fifth lateral groove away from one end of the sixth lateral groove to connect the two groove walls of the fifth lateral groove; and / or, the structural reinforcement protrusion is arranged on the bottom of the sixth lateral groove away from one end of the fifth lateral groove to connect the two groove walls of the sixth lateral groove.

[0016] Furthermore, in the direction from the shoulder pattern portion to the center plane S of the tire, the connecting groove includes a first sub-connecting groove, a second sub-connecting groove and a third sub-connecting groove that are connected in sequence, and the first sub-connecting groove and the third sub-connecting groove are used to connect the longitudinal grooves; wherein, the depth G3 of the first sub-connecting groove, the depth G4 of the second sub-connecting groove and the depth G5 of the third sub-connecting groove satisfy: G4<G3, G4<G5.

[0017] Furthermore, the two shoulder pattern portions include an inner shoulder pattern portion arranged close to the inner side of the tire, and the first transverse groove is arranged on the inner shoulder pattern portion; wherein, the depth G1 of the first sub-transverse groove and the depth G2 of the second sub-transverse groove satisfy: 0.25G1≤G2≤0.5G1; and / or, the extension direction of the first transverse groove and the width direction of the tire are arranged at a seventh angle A7, and the seventh angle A7 satisfies: 7°≤A7≤11°.

[0018] Furthermore, the two shoulder pattern portions also include an outer shoulder pattern portion arranged near the outer side of the tire, and the tire tread structure also includes: a longitudinal groove, which is arranged on the outer shoulder pattern portion and extends along the circumference of the tire; a seventh transverse groove, which is arranged on the outer shoulder pattern portion and is located on a side of the longitudinal groove away from the longitudinal groove, and one end of the seventh transverse groove close to the longitudinal groove is connected to the longitudinal groove; an eighth transverse groove, which is arranged on the outer shoulder pattern portion, and at least part of the eighth transverse groove is located on a side of the longitudinal groove away from the longitudinal groove, and the eighth transverse groove The end of the groove close to the longitudinal groove passes through the longitudinal groove; the recess group is arranged on the outer shoulder pattern portion and is located on the side of the longitudinal groove close to the longitudinal groove, and the recess group includes a plurality of second recesses, and the plurality of second recesses are arranged in a surrounding manner, and the second recesses are arranged in a polygonal shape; wherein, the width W1 of the longitudinal groove, the width W2 of the seventh transverse groove and the width W3 of the eighth transverse groove satisfy: 0.6mm≤W1≤1.5mm, 0.6mm≤W2≤1mm, 1.5mm<W3≤2.5mm.

[0019] Furthermore, there is a contact area between the tread and the driving surface, the outer shoulder pattern portion located on the side of the longitudinal groove close to the longitudinal groove has a width W4, and the outer shoulder pattern portion located on the side of the longitudinal groove away from the longitudinal groove has a width W5, and the width W4 and the width W5 satisfy: W5>W4; the extension direction of the part of the seventh transverse groove located in the contact area is set at an eighth angle A8 with the width direction of the tire, and the extension direction of the part of the eighth transverse groove located in the contact area is set at a ninth angle A9 with the width direction of the tire, and the eighth angle A8 and the ninth angle A9 satisfy: 6°≤A8≤8°, 6°≤A9≤8°.

[0020] Furthermore, the tire tread structure includes a plurality of pitch units arranged along the circumference of the tire, the plurality of pitch units including a first pitch unit, a second pitch unit and a third pitch unit, and the pitch P1 of the first pitch unit, the pitch P2 of the second pitch unit and the pitch P3 of the third pitch unit satisfy: 1.142P1≤P2≤1.202P1, 1.384P1≤P3≤1.444P1.

[0021] According to the technical solution of the present invention, a tire tread structure includes a plurality of longitudinal grooves extending circumferentially of the tire, the plurality of longitudinal grooves being spaced apart along the width of the tire to separate the tire tread into two shoulder pattern portions and an intermediate pattern portion located between the two shoulder pattern portions. The plurality of transverse grooves include a first transverse groove and a connecting groove. The first transverse groove is provided on the shoulder pattern portion and includes a first sub-transverse groove and a second sub-transverse groove that are interconnected. The second sub-transverse groove is provided adjacent to the longitudinal groove relative to the first sub-transverse groove. An end of the second sub-transverse groove that is distal to the first sub-transverse groove is connected to the longitudinal groove. The depth G1 of the first sub-transverse groove is greater than the depth G2 of the second sub-transverse groove. The connecting groove is provided on the intermediate pattern portion to connect the longitudinal grooves located on both sides of the intermediate pattern portion. At least a portion of the connecting groove is arranged in a curved shape. The width W of the transverse groove satisfies the following conditions: 0.6 mm ≤ W ≤ 1.5 mm. In this way, compared with traditional tires, the present application designs a large number of transverse grooves set in the tread for balancing the rigidity of the pattern portion, increasing the ground contact area, and improving the handling performance of the tire as narrow grooves (0.6mm≤W≤1.5mm). Balancing the rigidity of the pattern portion can reduce the impact noise between the tire and the driving surface, and the design of the narrow grooves can overall reduce the air storage volume in the tire tread (in the transverse grooves), thereby reducing the flow rate and flow rate of the airflow generated by the tread extrusion when the tire rolls, and further reducing the driving noise of the tire. At the same time, the depth design of the first sub-transverse groove and the second sub-transverse groove helps to further reduce the air storage volume and weaken the tube noise of the tire. Since the depth of the second sub-transverse groove connected to the longitudinal groove is smaller and its connecting area is also smaller, the second sub-transverse groove can block the airflow with large flow rate and flow velocity in the longitudinal groove, thereby weakening the noise generated by the airflow flowing into the first transverse groove during severe friction (the first transverse groove has a smaller volume). The curved connecting groove can make the noise reflect multiple times during the transmission process to reduce the noise energy and reduce the noise level, thereby comprehensively reducing the driving noise of the tire, thereby solving the problem of high noise generated by the tires of new energy vehicles during vehicle driving in the existing technology, and improving the user's driving experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 A partial front view of an embodiment of a tire tread structure according to the present invention is shown;

[0024] Figure 2 Shown Figure 1 A partial front view of the tire tread structure with other annotations;

[0025] Figure 3 Shown Figure 1 A schematic cross-sectional view of the communicating grooves of the tire tread structure;

[0026] Figure 4 Shown Figure 1 A schematic cross-sectional view of a fifth transverse groove of the tire tread structure;

[0027] Figure 5 Shown Figure 1 A schematic cross-sectional view of a second transverse groove of a tire tread structure;

[0028] Figure 6 Shown Figure 1 Schematic cross-sectional view of the first transverse groove of the tire tread structure.

[0029] The above drawings include the following reference numerals:

[0030] 1. Center tread; 2. Outer crown tread; 3. Inner crown tread; 4. Inner shoulder tread; 5. Outer shoulder tread;

[0031] 10. Longitudinal groove; 20. Transverse groove; 21. First transverse groove; 211. First sub-transverse groove; 212. Second sub-transverse groove; 22. Connecting groove; 221. First sub-connecting groove; 222. Second sub-connecting groove; 223. Third sub-connecting groove; 23. First pattern structure; 231. First transverse groove; 232. Second transverse groove; 2321. Straight segment; 2322. Bend segment; 2323. First sub-transverse groove; 2324. Second sub-transverse groove; 2325. Third sub-transverse groove Grooves; 24. Second pattern structure; 241. Third transverse grooves; 242. Fourth transverse grooves; 243. Bending end; 244. Straight end; 25. Third pattern structure; 251. Fifth transverse grooves; 252. Sixth transverse grooves; 30. First pattern group; 40. Second pattern group; 41. First recess; 42. Separating grooves; 50. Structural reinforcement protrusions; 60. Seventh transverse grooves; 70. Eighth transverse grooves; 80. Recess group; 81. Second recess; 90. Longitudinal grooves; 100. Strip cut corners. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this 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.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0034] In the present invention, unless otherwise specified, directional words such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are generally used with respect 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.

[0035] In order to solve the problem in the prior art that tires of new energy vehicles generate a lot of noise during vehicle driving, the present application provides a tire tread structure.

[0036] like Figures 1 to 6 As shown, the tire tread structure includes a plurality of longitudinal grooves 10 and a plurality of transverse grooves 20. Each longitudinal groove 10 extends along the circumference of the tire. The plurality of longitudinal grooves 10 are spaced apart along the width direction of the tire to separate the tire tread into two shoulder pattern portions and an intermediate pattern portion located between the two shoulder pattern portions. The plurality of transverse grooves 20 include a first transverse groove 21 and a connecting groove 22. The first transverse groove 21 is provided on the shoulder pattern portion and includes a first sub-transverse groove 211 and a second sub-transverse groove 212 that are interconnected. The second sub-transverse groove 212 is provided near the longitudinal groove 10 relative to the first sub-transverse groove 211. The second sub-transverse groove 212 is connected to the longitudinal groove 10 at one end away from the first sub-transverse groove 211. The depth G1 of the first sub-transverse groove 211 is greater than the depth G2 of the second sub-transverse groove 212. The connecting groove 22 is provided on the middle tread portion to connect the longitudinal grooves 10 on both sides of the middle tread portion. At least a portion of the connecting groove 22 is bent. The width W of the transverse groove 20 satisfies the following conditions: 0.6 mm ≤ W ≤ 1.5 mm.

[0037] Applying the technical solution of this embodiment, the multiple longitudinal grooves 10 of the tire tread structure all extend along the circumference of the tire, and the multiple longitudinal grooves 10 are spaced apart along the width direction of the tire to separate the tire tread into two shoulder pattern portions and an intermediate pattern portion located between the two shoulder pattern portions. The multiple transverse grooves 20 include a first transverse groove 21 and a connecting groove 22. The first transverse groove 21 is arranged on the shoulder pattern portion and includes a first sub-transverse groove 211 and a second sub-transverse groove 212 that are connected to each other. The second sub-transverse groove 212 is arranged close to the longitudinal groove 10 relative to the first sub-transverse groove 211, and the second sub-transverse groove 212 is connected to the longitudinal groove 10 at one end away from the first sub-transverse groove 211. The depth G1 of the first sub-transverse groove 211 is greater than the depth G2 of the second sub-transverse groove 212. The connecting groove 22 is arranged on the intermediate pattern portion to connect the longitudinal grooves 10 located on both sides of the intermediate pattern portion, and at least part of the connecting groove 22 is arranged in a bent shape. The width W of the transverse grooves 20 satisfies the following: 0.6mm≤W≤1.5mm. Thus, compared to conventional tires, the present application designs the numerous transverse grooves 20 provided in the tread to balance the rigidity of the tread portion, increase the contact patch, and enhance the handling performance of the tire as narrow grooves (0.6mm≤W≤1.5mm). Balancing the rigidity of the tread portion inherently reduces the impact noise between the tire and the driving surface, while the narrow groove design can overall reduce the amount of air stored in the tire tread (within the transverse grooves 20), thereby reducing the flow rate and velocity of the airflow generated by tread compression during tire rolling, further reducing the tire's driving noise. At the same time, the depth design of the first sub-transverse groove 211 and the second sub-transverse groove 212 helps to further reduce the air storage volume and weaken the tube cavity noise of the tire. Since the depth of the second sub-transverse groove 212 connected to the longitudinal groove 10 is smaller and its connecting area is also smaller, the second sub-transverse groove 212 can block the airflow with large flow rate and flow velocity in the longitudinal groove 10, thereby weakening the noise generated by the airflow flowing into the first transverse groove 21 during severe friction (the first transverse groove 21 is relatively small in volume). The curved connecting groove 22 can make the noise reflect multiple times during the transmission process to reduce the noise energy and reduce the noise level, thereby comprehensively reducing the driving noise of the tire, thereby solving the problem of high noise generated by the tires of new energy vehicles during vehicle driving in the existing technology, and improving the user's driving experience.

[0038] In this embodiment, four longitudinal grooves 10 are arranged at intervals along the width direction of the tire to divide the tread of the tire into two shoulder pattern portions and three middle pattern portions located between the two shoulder pattern portions.

[0039] It should be noted that the number of longitudinal grooves 10 is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, the number of longitudinal grooves 10 is three, four, six, seven, or more.

[0040] Specifically, the narrow transverse grooves 20 can cut the water film, that is, when the tire is running on a wet road, water will form a complete water film between the tread and the running surface, thereby reducing the friction coefficient between the tread and the running surface and making the tire prone to slipping. The narrow transverse grooves 20 can cut the water film during the extrusion deformation process of the tread to avoid the performance of the complete water film, thereby improving the tire's anti-slip performance.

[0041] like Figure 1 As shown, there are multiple intermediate tread sections, including a central tread section 1. At least a portion of the central tread section 1 coincides with the tire's center plane S. The multiple transverse grooves 20 also include a first tread structure 23. The central tread section 1 is provided with the first tread structure 23, which includes a first transverse groove 231 and a second transverse groove 232 spaced apart along the tire's width. The first transverse groove 231, distal from the second transverse groove 232, communicates with the longitudinal groove 10 on one side of the central tread section 1, while the second transverse groove 232, distal from the first transverse groove 231, communicates with the longitudinal groove 10 on the other side of the central tread section 1. This arrangement results in a complete tread block between the first transverse groove 231 and the second transverse groove 232, i.e., the first transverse groove 231 and the second transverse groove 232 are not connected. This results in greater rigidity in the center of the central tread section 1 than at the edges, providing the tire with a better sense of centering during handling and improving steering performance. At the same time, the non-through first pattern structure 23 also helps to reduce the pumping noise of the tire.

[0042] like Figure 1 As shown, the second transverse groove 232 includes a connected straight segment 2321 and a curved segment 2322. The curved segment 2322 is located closer to the first transverse groove 231 relative to the straight segment 2321. The straight segment 2321 forms a first angle A1 with the tire's width, and the first transverse groove 231 extends at a second angle A2 with the tire's width. The first angle A1 and the second angle A2 satisfy the following conditions: 28° ≤ A1 ≤ 32°, and 28° ≤ A2 ≤ 32°. Thus, the curved segment 2322 of the second transverse groove 232 balances the circumferential rigidity of the complete tread block at the center. This ensures that the circumferential rigidity of the center tread portion 1 is balanced with its widthwise rigidity, preventing excessive rigidity at the center and further improving the tire's steering performance.

[0043] In this embodiment, the extending direction of the end of the bent segment 2322 away from the straight segment 2321 is approximately parallel to the circumferential direction of the tire, so as to balance the rigidity of the center tread portion 1 in the circumferential direction of the tire.

[0044] In this embodiment, the first angle A1 and the second angle A2 are both 30°.

[0045] Specifically, the inclined groove structure has a certain weight in both the tire width direction and the tire circumferential direction, that is, it has the effect of balancing the rigidity of the pattern portion in the tire circumferential direction and the rigidity in the tire width direction.

[0046] like Figure 5 As shown, along the direction from the second transverse groove 232 to the first transverse groove 231, the second transverse groove 232 includes a first sub-transverse groove 2323, a second sub-transverse groove 2324, and a third sub-transverse groove 2325, which are connected in sequence. The depth G8 of the first sub-transverse groove 2323, the depth G9 of the second sub-transverse groove 2324, and the depth G10 of the third sub-transverse groove 2325 satisfy the following conditions: 0.4G9≤G8≤0.6G9, and 0.4G9≤G10≤0.6G9. This arrangement further ensures greater rigidity of the tread block at the center of the central tread portion 1. That is, the first sub-transverse groove 2323 and the third sub-transverse groove 2325, which have smaller depths, have less ability to reduce rigidity. This further ensures greater rigidity at the center of the central tread portion 1, thereby improving the tire's steering performance.

[0047] In this embodiment, the depth G8 of the first sub-transverse groove 2323 and the depth G10 of the third sub-transverse groove 2325 are half the depth G9 of the second sub-transverse groove 2324 .

[0048] In this embodiment, the first sub-transverse groove 2323 with a smaller depth can increase the rigidity of the junction between the second transverse groove 232 and the longitudinal groove 10 to prevent the rigidity of the junction from being too low, which may cause the edge of the pattern block to fall off, thereby extending the service life of the tire.

[0049] In this embodiment, the first transverse groove 231 has a length L1 in the width direction of the tire, and the second transverse groove 232 has a length L2 in the width direction of the tire. The length L1 and the length L2 satisfy: L2 = 2L1, so as to further ensure that the rigidity at the middle position of the center pattern portion 1 is greater.

[0050] In this embodiment, there are multiple first pattern structures 23, which are spaced apart along the circumference of the tire. The tire tread structure also includes a first pattern group 30, which includes two adjacent first pattern structures 23. Within a first pattern group 30, the straight segment 2321 of one first pattern structure 23 and the first transverse groove 231 of another first pattern structure 23 communicate with the longitudinal groove 10 located on one side of the central pattern portion 1, and the bent segments 2322 of the two first pattern structures 23 bend toward each other. In this way, the two first pattern structures 23 in the first pattern group 30 will surround a complete pattern block, and because the straight segment 2321 of one first pattern structure 23 and the first transverse groove 231 of the other first pattern structure 23 are connected with the longitudinal groove 10 located on one side of the central pattern portion 1, the two first pattern structures 23 are centrally symmetrical, so as to ensure that the bent segments 2322 of the two first pattern structures 23 can provide a more balanced rigidity balance to the central pattern portion 1 in the circumferential direction of the tire.

[0051] Specifically, within a first pattern group 30 , the endpoints of two first pattern structures 23 are cross-connected to form an intersection, and the two first pattern structures 23 are centrally symmetrical with the intersection as the center point.

[0052] Specifically, the above arrangement of the first pattern group 30 also makes the pattern structure on the central pattern portion 1 more beautiful.

[0053] like Figure 1As shown, the multiple intermediate pattern portions also include a crown pattern portion located between the center pattern portion 1 and the shoulder pattern portion. The crown pattern portion arranged near the outer side of the tire is the outer crown pattern portion 2. The outer crown pattern portion 2 is provided with a plurality of first pattern structures 23. The plurality of first pattern structures 23 are arranged at intervals along the circumferential direction of the tire. The multiple transverse grooves 20 also include a second pattern structure 24. The second pattern structure 24 is located between two adjacent first pattern structures 23. The second pattern structure 24 includes a third transverse groove 241 and a fourth transverse groove 242 arranged at intervals along the width direction of the tire. The end of the third transverse groove 241 away from the fourth transverse groove 242 is connected to the longitudinal groove 10 located on one side of the outer crown pattern portion 2, and the end of the fourth transverse groove 242 away from the third transverse groove 241 is connected to the longitudinal groove 10 located on the other side of the outer crown pattern portion 2. The ends of the third transverse groove 241 and the fourth transverse groove 242 close to each other are bent to form a bent end 243. A second pattern group 40 is formed between the second pattern structure 24 and an adjacent first pattern structure 23. Within each second pattern group 40, the bent ends 243 of the third transverse grooves 241 and the bent sections 2322 of the first pattern structure 23 are bent toward each other, while the bent ends 243 of the fourth transverse grooves 242 are bent away from the first pattern structure 23. This arrangement results in a structure of the second pattern group 40 located on the outer crown pattern portion 2 similar to that of the first pattern group 30, resulting in a more balanced rigidity of the outer crown pattern portion 2 along the tire circumferential direction and along the tire width, thereby improving the tire's steering, handling, and braking performance. Furthermore, unlike the first pattern group 30, the bent ends 243 of the fourth transverse grooves 242 are bent away from the first pattern structure 23, further balancing the circumferential rigidity of the pattern blocks between the two second pattern groups 40.

[0054] Specifically, compared with the center tread portion 1, the crown tread portion has less influence on the steering performance of the tire, so the crown tread portion focuses more on optimizing and balancing the rigidity to increase the interaction force between the tire and the driving surface.

[0055] like Figure 1 As shown, the straight ends 244 of the third transverse grooves 241 extend at a third angle A3 with the tire width, and the straight ends 244 of the fourth transverse grooves 242 extend at a fourth angle A4 with the tire width. The third angle A3 and the fourth angle A4 satisfy the following conditions: 32°≤A3≤38°, and 32°≤A4≤38°. This arrangement further ensures a balance between the rigidity of the outer crown pattern portion 2 along the tire circumference and its rigidity along the tire width, thereby further improving the tire's handling and braking performance.

[0056] Specifically, the second tread group 40 also includes a first recess 41 and a separation groove 42. In one second tread group 40, the first recess 41 is located on the side of the fourth transverse groove 242 away from the first tread structure 23. The first recess 41 is polygonal in shape. The separation groove 42 is located between the bent end 243 of the fourth transverse groove 242 and the first recess 41. The arrangement of the first recess 41 and the separation groove 42 enhances the tread's ability to cut through water, further improving the tire's wet performance.

[0057] In this embodiment, the first recess 41 is a triangular recess to enhance the overall aesthetics of the outer crown pattern portion 2 .

[0058] In this embodiment, the first recess 41 is a shallow recess with a depth of 1 mm to avoid excessive influence on the rigidity of the outer crown pattern portion 2 .

[0059] In this embodiment, the straight end 244 of the fourth transverse groove 242 is a straight groove, and a strip cut angle 100 (actually a chamfered angle structure) is provided on the groove wall of the straight groove to remove the sharper corners at the edge of the groove, thereby avoiding the phenomenon of block falling and extending the service life of the tire. At the same time, the contact area between the outer crown pattern portion 2 and the driving surface is increased, thereby improving the handling performance of the tire.

[0060] In this embodiment, a large number of narrow grooves (i.e., first and second tread structures 23 and 24) are used to segment the tread sections, balancing tread rigidity while reducing gas storage within the grooves and alleviating pumping noise. Furthermore, optimizing the inclination angles of the first and second tread structures 23 and 24 further mitigates lumen noise, significantly enhancing ride comfort.

[0061] like Figure 1As shown, the crown pattern portion located near the inner side of the tire is the inner crown pattern portion 3. A plurality of connecting grooves 22 are provided on the inner crown pattern portion 3. The connecting grooves 22 are spaced apart along the circumference of the tire. The plurality of transverse grooves 20 also include a third pattern structure 25 located between two adjacent connecting grooves 22. The third pattern structure 25 includes a fifth transverse groove 251 and a sixth transverse groove 252 spaced apart along the width direction of the tire. The end of the fifth transverse groove 251 away from the sixth transverse groove 252 communicates with the longitudinal groove 10 located on one side of the inner crown pattern portion 3, and the end of the sixth transverse groove 252 away from the fifth transverse groove 251 communicates with the longitudinal groove 10 located on the other side of the inner crown pattern portion 3. The fifth transverse groove 251 is arc-shaped, and / or the sixth transverse groove 252 is arc-shaped. In this way, while the connecting groove 22 connects two adjacent longitudinal grooves 10 to enhance the tire's drainage function, the third pattern structure 25 located between the two adjacent connecting grooves 22 can further balance the rigidity of the pattern blocks between the two connecting grooves 22. Furthermore, the curved connecting groove, the arcuate fifth transverse groove 251, and the arcuate sixth transverse groove 252 can all balance the rigidity of the inner crown pattern portion 3 in both the tire circumferential and tire width directions, further increasing the interaction force between the tire and the running surface, thereby improving the tire's handling performance.

[0062] In this embodiment, the communication groove 22 is arranged in an “S” shape.

[0063] like Figure 1 As shown, the fifth transverse groove 251 and the sixth transverse groove 252 are both arranged in an arc shape. The third pattern structure 25 extends at a fifth angle A5 with the tire width, and the connecting groove 22 extends at a sixth angle A6 with the tire width. The fifth angle A5 and the sixth angle A6 satisfy the following conditions: 38°≤A5≤42°, and 38°≤A6≤42°. This arrangement further enhances the rigidity optimization effect of the third pattern structure 25 and the connecting groove 22 on the inner crown tread portion 3, ensuring balanced ground contact pressure on the inner crown tread portion 3 and preventing abnormal wear. This not only improves the tire's handling performance but also extends its service life.

[0064] Specifically, the fifth transverse groove 251 and the sixth transverse groove 252 have opposite protruding directions, and the fifth angle A5 and the sixth angle A6 are the same in size, so that the third pattern structure 25 as a whole forms an "S"-shaped structure parallel to the connecting groove 22.

[0065] Specifically, if the inclination angle of the third pattern structure 25 and the connecting groove 22 is too large or too small, it will lead to an imbalance between the rigidity of the inner crown pattern portion 3 in the tire circumferential direction and the rigidity in the tire width direction, which will not only affect the magnitude of the interaction force between the tread and the driving surface, but also cause uneven extrusion deformation of the inner crown pattern portion 3, and thus cause abnormal wear.

[0066] Specifically, the length L3 of the fifth lateral groove 251 in the tire width direction, the length L4 of the sixth lateral groove 252 in the tire width direction, and the width w3 of the inner crown pattern portion 3 satisfy: L3=0.396w3, L4=0.479w3.

[0067] like Figure 4 As shown, the tire tread structure further includes a structural reinforcement protrusion 50, which is disposed on the bottom of the fifth transverse groove 251 at the end away from the sixth transverse groove 252, for connecting the two groove walls of the fifth transverse groove 251; and / or, the structural reinforcement protrusion 50 is disposed on the bottom of the sixth transverse groove 252 at the end away from the fifth transverse groove 251, for connecting the two groove walls of the sixth transverse groove 252. Thus, the above-described arrangement of the structural reinforcement protrusion 50 ensures greater rigidity at the junction of the inner crown pattern portion 3 and the longitudinal groove 10, while less rigidity at the middle of the inner crown pattern portion 3. This further reduces deformation of the edge of the inner crown pattern portion 3 during intense tire manipulation, reduces the probability of tread block loss in the inner crown pattern portion 3, and extends the service life of the tire.

[0068] In this embodiment, the depth of the fifth and sixth transverse grooves 251 and 252 is G6, and the height of the structural reinforcement protrusion 50 is H1, where H1 = (2 / 3) G6. This configuration optimizes the airflow direction within the fifth and sixth transverse grooves 251 and 252, thereby preventing pumping noise.

[0069] like Figure 3As shown, in the direction from the shoulder tread portion to the tire's center plane S, the connecting groove 22 includes a first sub-connecting groove 221, a second sub-connecting groove 222, and a third sub-connecting groove 223, which are connected in sequence. The first sub-connecting groove 221 and the third sub-connecting groove 223 are used to connect to the longitudinal groove 10. The depth G3 of the first sub-connecting groove 221, the depth G4 of the second sub-connecting groove 222, and the depth G5 of the third sub-connecting groove 223 satisfy the following conditions: G4 < G3, and G4 < G5. Thus, the smaller depths of the first and second sub-connecting grooves 221, 222, which are connected to the longitudinal groove 10, increase the rigidity at the junction of the connecting groove 22 and the longitudinal groove 10, while reducing the rigidity in the middle of the inner crown tread portion 3. This prevents the edge of the inner crown tread portion 3 from deforming during aggressive tire handling, reducing the likelihood of tread block loss in the inner crown tread portion 3 and extending the tire's service life.

[0070] In this embodiment, the depth G3 of the second sub-connecting groove 222 is consistent with the depth G6 of the fifth transverse groove 251. The depth G3 of the first sub-connecting groove 221 and the depth G5 of the third sub-connecting groove 223 are consistent and both equal to (1 / 3) G6. This arrangement optimizes the airflow direction within the connecting groove 22, preventing the generation of pumping noise. Furthermore, this arrangement ensures that the depths of the connecting groove 22, the fifth transverse groove 251, and the sixth transverse groove 252 are consistent, optimizing the rigidity balance of the inner crown pattern portion 3.

[0071] In this embodiment, a strip-shaped cut angle 100 (actually a chamfered angle structure) is provided on the groove wall of the fifth transverse groove 251 and the sixth transverse groove 252 to remove the sharper corners at the groove edge, thereby avoiding the phenomenon of block falling and extending the service life of the tire. At the same time, the contact area between the inner crown pattern portion 3 and the driving surface is increased, thereby improving the handling performance of the tire.

[0072] like Figure 1 and Figure 6As shown, the two shoulder pattern portions include an inner shoulder pattern portion 4 disposed near the inner side of the tire, and the first transverse groove 21 is disposed on the inner shoulder pattern portion 4. The depth G1 of the first sub-transverse groove 211 and the depth G2 of the second sub-transverse groove 212 satisfy the following relationship: 0.25G1≤G2≤0.5G1; and / or the extending direction of the first transverse groove 21 forms a seventh angle A7 with the width direction of the tire, and the seventh angle A7 satisfies the following relationship: 7°≤A7≤11°. On the one hand, the above-mentioned setting makes the inclination angle of the first transverse groove 21 more appropriate, ensuring that the rigidity balance with the inner shoulder pattern portion 4 is more appropriate, so as to improve the handling performance of the tire, while avoiding the shoulder impact noise problem caused by excessive rigidity of the inner shoulder pattern portion 4, thereby reducing the driving noise of the tire; on the other hand, the setting of the depth G1 and the depth G2 can not only avoid the increase in noise problem caused by excessive gas storage in the inner shoulder pattern portion 4, but also ensure that the penetration between the inner shoulder pattern portion 4 and the inner side of the tire is more appropriate, so as to improve the wet driving performance of the tire.

[0073] In this embodiment, the depth G1 of the first sub-transverse groove 211 and the depth G2 of the second sub-transverse groove 212 satisfy the following relationship: G2 = (1 / 3) G1.

[0074] Specifically, multiple sets of engraved tire comparisons were set with different ratios of depth G1 and depth G2 to conduct evaluation tests. The comfort, noise, dry handling, and wet handling of the engraved tires were scored, and the following evaluation test results were obtained:

[0075] Table 1:

[0076]

[0077]

[0078] It can be seen that when G2 = (1 / 3) G1, the performance scores of the tire are more balanced.

[0079] In this embodiment, one end of the first transverse groove 21 away from the longitudinal groove 10 actually extends to the tire shoulder to communicate with the outer side of the tire, that is, the longitudinal groove 10 can drain water through the first transverse groove 21 .

[0080] Specifically, if the inclination angle of the first transverse groove 21 is too large, the rigidity of the inner shoulder pattern portion 4 will be seriously lost. Although the tire comfort is improved, the handling performance is lost too much, the steering stability of the tire is seriously insufficient, and it may even affect the user's riding safety. If the inclination angle of the first transverse groove 21 is too small, although the rigidity of the inner shoulder pattern portion 4 is improved and the handling can be guaranteed, the impact between the inner shoulder pattern portion 4 with excessive rigidity and the driving surface is too severe, which not only increases the rolling noise of the tire, but also reduces the user's riding comfort (increased bumpiness).

[0081] In this embodiment, a strip-shaped cut angle 100 (actually a chamfered angle structure) is provided on the groove wall of the first transverse groove 21 to remove the sharper corners at the edge of the groove, thereby avoiding the phenomenon of block falling, thereby extending the service life of the tire and increasing the contact area between the inner shoulder pattern portion 4 and the driving surface, thereby improving the handling performance of the tire.

[0082] In this embodiment, the maximum depth of the strip chamfer angles provided in the first transverse grooves 21 is 1 mm.

[0083] In this embodiment, the two shoulder tread portions further include an outer shoulder tread portion 5 disposed near the outer side of the tire. The tire tread structure further includes a longitudinal groove 90, a seventh transverse groove 60, an eighth transverse groove 70, and a recess group 80. The longitudinal groove 90 is disposed on the outer shoulder tread portion 5 and extends along the circumference of the tire. The seventh transverse groove 60 is disposed on the outer shoulder tread portion 5 and is located on the side of the longitudinal groove 90 away from the longitudinal groove 10. The end of the seventh transverse groove 60 proximal to the longitudinal groove 90 communicates with the longitudinal groove 90. The eighth transverse groove 70 is disposed on the outer shoulder tread portion 5. At least a portion of the eighth transverse groove 70 is located on the side of the longitudinal groove 90 away from the longitudinal groove 10. The end of the eighth transverse groove 70 proximal to the longitudinal groove 10 extends through the longitudinal groove 90. The recess group 80 is provided on the outer shoulder tread portion 5 and is located on the side of the longitudinal groove 90 near the longitudinal groove 10. The recess group 80 includes a plurality of second recesses 81, which are arranged in a circumferential manner and are arranged in a polygonal shape. The width W1 of the longitudinal groove 90, the width W2 of the seventh transverse groove 60, and the width W3 of the eighth transverse groove 70 satisfy the following conditions: 0.6 mm ≤ W1 ≤ 1.5 mm, 0.6 mm ≤ W2 ≤ 1 mm, and 1.5 mm < W3 ≤ 2.5 mm. In this way, by adopting the seventh transverse groove 60, the eighth transverse groove 70 and the longitudinal groove 90 designed with the above-mentioned width to divide the outer shoulder pattern portion 5, on the one hand, the rigidity of the outer shoulder pattern portion 5 can be balanced to improve the handling performance of the tire, reduce the impact of the tire on the driving surface, and thus optimize the shoulder impact noise of the tire; on the other hand, the air storage amount at the outer shoulder pattern portion 5 can be reduced, weakening the vibration caused by the change of the internal air flow and air pressure of the outer shoulder pattern portion 5 when it touches the ground, thereby further reducing the rolling noise of the tire.

[0084] like Figure 1 As shown, there is a contact area between the tread and the running surface. The outer shoulder pattern portion 5 located on the side of the longitudinal groove 90 closer to the longitudinal groove 10 has a width W4, and the outer shoulder pattern portion 5 located on the side of the longitudinal groove 90 farther from the longitudinal groove 10 has a width W5. The relationship between width W4 and width W5 satisfies: W5>W4. The extension direction of the portion of the seventh transverse groove 60 located within the contact area forms an eighth angle A8 with the width direction of the tire. The extension direction of the portion of the eighth transverse groove 70 located within the contact area forms a ninth angle A9 with the width direction of the tire. The eighth angle A8 and the ninth angle A9 satisfy: 6°≤A8≤8°, and 6°≤A9≤8°. Thus, the above angle settings help improve the tire's handling performance and reduce the tire's rolling noise.

[0085] Specifically, if the inclination angle of the seventh lateral groove 60 and the eighth lateral groove 70 is too large, the length of the two will be longer, the air storage volume in the grooves will be larger, and the noise generated by air vibration and air compression will increase; if the inclination angle of the seventh lateral groove 60 and the eighth lateral groove 70 is too small, the rigidity of the outer shoulder pattern portion 5 will easily be too large, which will not only affect the handling performance of the tire, but also increase the impact noise.

[0086] Specifically, during the turning process of the tire vehicle (vehicle rolling), the outer shoulder pattern portion 5 is subjected to greater pressure than other pattern portions, and the grip it needs to provide is also greater. The overall rigidity of the outer shoulder pattern portion 5 should be smaller than the overall rigidity of other pattern portions. Therefore, in the embodiment, an eighth transverse groove 70 with a larger width is provided and an additional longitudinal groove 90 is added to further balance the rigidity of the outer shoulder pattern portion 5.

[0087] In this embodiment, the depth G7 of the longitudinal groove 90 is 2 mm.

[0088] In this embodiment, the width W4 of the outer shoulder pattern portion 5 located on the side of the longitudinal groove 90 close to the longitudinal groove 10 is 9 mm to 12 mm. The outer shoulder pattern portion 5 of this part is a whole pattern block, and the recess group 80 arranged thereon can play a role in cutting the water film to further increase the wet driving performance of the outer shoulder pattern portion 5.

[0089] In this embodiment, the second recess 81 is a triangular recess with a depth of 1 mm to avoid affecting the rigidity of the outer shoulder pattern portion 5 located on the side of the longitudinal groove 90 close to the longitudinal groove 10 .

[0090] In this embodiment, the end of the eighth transverse groove 70 at a smaller distance is away from the through longitudinal groove 90 , and the second recess 81 is arranged around the end to form a star-shaped pattern, thereby making the outer shoulder pattern portion 5 more beautiful.

[0091] In this embodiment, the tire tread structure includes multiple pitch units arranged along the tire's circumference. The multiple pitch units include a first pitch unit, a second pitch unit, and a third pitch unit. The pitch P1 of the first pitch unit, the pitch P2 of the second pitch unit, and the pitch P3 of the third pitch unit satisfy the following conditions: 1.142P1≤P2≤1.202P1, and 1.384P1≤P3≤1.444P1. This arrangement creates a more intricate and complex tread pattern. Finite element simulation analysis shows that this pitch arrangement helps reduce the likelihood of noise resonance, effectively reducing tire rolling noise and improving driving comfort.

[0092] In this embodiment, the total crown arc length TAW of the tread and the nominal section width SN of the tire satisfy the following relationship: 0.82≤TAW / SN≤0.86.

[0093] In this embodiment, the width w3 of the inner crown pattern portion 3, the width w1 of the center pattern portion, the width w2 of the outer crown pattern portion 2 and the total crown arc length TAW satisfy: 0.102TAW≤(w3=w1=w2)≤0.122TAW.

[0094] In this embodiment, the width w4 of the longitudinal groove 10 satisfies the following relationship with the total crown arc length TAW: 0.041TAW≤w4≤0.047TAW. Thus, the above-described groove width and tread width ensure both dry handling and wet drainage performance, as well as vehicle safety and stability during cornering and straight-line driving.

[0095] In this embodiment, within a pitch unit, the inner shoulder pattern blocks of the inner shoulder pattern portion 4 within the pitch unit, the inner crown pattern blocks of the inner crown pattern portion 3 within the pitch unit, the center pattern blocks of the center pattern portion 1 within the pitch unit, the outer crown pattern blocks of the outer crown pattern portion 2 within the pitch unit and the outer shoulder pattern blocks of the outer shoulder pattern portion 5 within the pitch unit are staggered along the circumferential direction of the tire to form a staggered frequency unequal pitch pattern structure, which further reduces the rolling noise of the tire.

[0096] In this embodiment, within one pitch unit, the inner shoulder pattern block and the inner crown pattern block have a first offset p1, the inner crown pattern block and the center pattern block have a second offset p2, the center pattern block and the outer crown pattern block have a third offset p3, and the outer crown pattern block and the outer shoulder pattern block have a fourth offset p4. The relationship between p1, p2, p3 and p4 and the circumference l of the tire satisfies: p1 = 0.002064l, p2 = 0.002981l, p3 = 0.007201l, p4 = 0.00602l, further optimizing the relationship between the ground contact position and the groove position of the tire ground contact surface and reducing the generation of tire cavity noise and pumping noise.

[0097] In this embodiment, the contact ratio F of the tread of the tire using the tire tread structure of this embodiment satisfies 74±2% to ensure a balance between the dry performance and wet performance of the tire.

[0098] Specifically, to verify the performance of the tire tread structure in this embodiment, optimized parameter design was performed according to the above parameters. Evaluation tests were conducted on engraved tires using the tire tread structure in this embodiment and engraved tires of existing products. The test evaluation results are as follows:

[0099] Table 2:

[0100] Evaluation Project Old products This embodiment Fuel economy 100 108 Comfort 100 112 Noise inside the car 100 110 Wet handling 100 105 Dry handling 100 108 Wet braking performance 100 102 Dry braking performance 100 106

[0101] The above results are expressed as a score based on the performance of the old product being 100 points, with larger values indicating better performance.

[0102] Specifically, the test method is to evaluate the performance of the test vehicle when it is driving at a specified speed on a professional test site simulating an urban road.

[0103] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0104] The tire tread structure comprises a plurality of longitudinal grooves extending circumferentially of the tire. The plurality of longitudinal grooves are spaced apart along the width of the tire to divide the tire tread into two shoulder pattern portions and an intermediate pattern portion located between the two shoulder pattern portions. The plurality of transverse grooves include a first transverse groove and a connecting groove. The first transverse groove is provided on the shoulder pattern portion and includes a first sub-transverse groove and a second sub-transverse groove that are interconnected. The second sub-transverse groove is provided adjacent to the longitudinal groove relative to the first sub-transverse groove. The second sub-transverse groove is connected to the longitudinal groove at one end distal from the first sub-transverse groove. The depth G1 of the first sub-transverse groove is greater than the depth G2 of the second sub-transverse groove. The connecting groove is provided on the intermediate pattern portion to connect the longitudinal grooves located on both sides of the intermediate pattern portion. At least a portion of the connecting groove is arranged in a curved shape. The width W of the transverse groove satisfies the following conditions: 0.6 mm ≤ W ≤ 1.5 mm. In this way, compared with traditional tires, the present application designs a large number of transverse grooves set in the tread for balancing the rigidity of the pattern portion, increasing the ground contact area, and improving the handling performance of the tire as narrow grooves (0.6mm≤W≤1.5mm). Balancing the rigidity of the pattern portion can reduce the impact noise between the tire and the driving surface, and the design of the narrow grooves can overall reduce the air storage volume in the tire tread (in the transverse grooves), thereby reducing the flow rate and flow rate of the airflow generated by the tread extrusion when the tire rolls, and further reducing the driving noise of the tire. At the same time, the depth design of the first sub-transverse groove and the second sub-transverse groove helps to further reduce the air storage volume and weaken the tube noise of the tire. Since the depth of the second sub-transverse groove connected to the longitudinal groove is smaller and its connecting area is also smaller, the second sub-transverse groove can block the airflow with large flow rate and flow velocity in the longitudinal groove, thereby weakening the noise generated by the airflow flowing into the first transverse groove during severe friction (the first transverse groove has a smaller volume). The curved connecting groove can make the noise reflect multiple times during the transmission process to reduce the noise energy and reduce the noise level, thereby comprehensively reducing the driving noise of the tire, thereby solving the problem of high noise generated by the tires of new energy vehicles during vehicle driving in the existing technology, and improving the user's driving experience.

[0105] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. 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.

[0106] 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, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0107] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0108] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A tire tread structure, characterized in that: include: A plurality of longitudinal grooves (10), each of the longitudinal grooves (10) extending along the circumference of the tire, and the plurality of longitudinal grooves (10) being arranged at intervals along the width direction of the tire to separate the tread of the tire into two shoulder pattern portions and an intermediate pattern portion located between the two shoulder pattern portions; A plurality of transverse grooves (20), including a first transverse groove (21) and a connecting groove (22); The first transverse groove (21) is arranged on the shoulder pattern portion and includes a first sub-transverse groove (211) and a second sub-transverse groove (212) that are connected to each other, the second sub-transverse groove (212) is arranged close to the longitudinal groove (10) relative to the first sub-transverse groove (211), and one end of the second sub-transverse groove (212) away from the first sub-transverse groove (211) is connected to the longitudinal groove (10), and the depth G1 of the first sub-transverse groove (211) is greater than the depth G2 of the second sub-transverse groove (212); The connecting groove (22) is provided on the middle tread portion to connect the longitudinal grooves (10) located on both sides of the middle tread portion, and at least a portion of the connecting groove (22) is provided in a bent shape; Wherein, the width W of the transverse groove (20) satisfies: 0.6 mm ≤ W ≤ 1.5 mm.

2. The tire tread structure according to claim 1, characterized in that: The intermediate tread portions are multiple and include a central tread portion (1), at least part of the central tread portion (1) coincides with the center plane S of the tire, and the multiple transverse grooves (20) further include: A first tread structure (23), wherein the first tread structure (23) is provided on the central tread portion (1), and the first tread structure (23) comprises a first transverse groove (231) and a second transverse groove (232) spaced apart along the width direction of the tire, wherein one end of the first transverse groove (231) away from the second transverse groove (232) is connected to the longitudinal groove (10) located on one side of the central tread portion (1), and one end of the second transverse groove (232) away from the first transverse groove (231) is connected to the longitudinal groove (10) located on the other side of the central tread portion (1).

3. The tire tread structure according to claim 2, wherein: The second transverse groove (232) comprises a straight section (2321) and a bent section (2322) that are interconnected, and the bent section (2322) is arranged closer to the first transverse groove (231) relative to the straight section (2321); The straight line segment (2321) is arranged at a first angle A1 with the width direction of the tire, and the extension direction of the first transverse groove (231) is arranged at a second angle A2 with the width direction of the tire, and the first angle A1 and the second angle A2 satisfy: 28°≤A1≤32°, 28°≤A2≤32°.

4. The tire tread structure according to claim 2, wherein: Along the direction from the second transverse groove (232) to the first transverse groove (231), the second transverse groove (232) includes a first sub-transverse groove (2323), a second sub-transverse groove (2324) and a third sub-transverse groove (2325) connected in sequence, and the depth G8 of the first sub-transverse groove (2323), the depth G9 of the second sub-transverse groove (2324) and the depth G10 of the third sub-transverse groove (2325) satisfy: 0.4G9≤G8≤0.6G9, 0.4G9≤G10≤0.6G9.

5. The tire tread structure according to claim 3, wherein: There are a plurality of the first pattern structures (23), and the plurality of the first pattern structures (23) are arranged at intervals along the circumference of the tire. The tire tread structure further comprises: A first pattern group (30) comprising two adjacent first pattern structures (23); In one group of the first pattern groups (30), a straight line segment (2321) of one first pattern structure (23) and a first transverse groove (231) of another first pattern structure (23) are connected to the longitudinal groove (10) located on one side of the central pattern portion (1), and the bent segments (2322) of the two first pattern structures (23) are bent toward each other.

6. The tire tread structure according to claim 3, characterized in that: The plurality of intermediate tread portions further include a crown tread portion located between the central tread portion (1) and the shoulder tread portion, the crown tread portion disposed close to the outer side of the tire being an outer crown tread portion (2), the outer crown tread portion (2) being provided with a plurality of the first tread structures (23), the plurality of the first tread structures (23) being disposed at intervals along the circumference of the tire, and the plurality of the transverse grooves (20) further including: a second tread structure (24) located between two adjacent first tread structures (23), the second tread structure (24) comprising a third transverse groove (241) and a fourth transverse groove (242) spaced apart in the width direction of the tire, the end of the third transverse groove (241) away from the fourth transverse groove (242) being connected to the longitudinal groove (10) located on one side of the outer crown tread portion (2), the end of the fourth transverse groove (242) away from the third transverse groove (241) being connected to the longitudinal groove (10) located on the other side of the outer crown tread portion (2), and the ends of the third transverse groove (241) and the fourth transverse groove (242) close to each other being bent to form a bent end (243); A second pattern group (40) is formed between the second pattern structure (24) and a first pattern structure (23) adjacent thereto. In one of the second pattern groups (40), the bent end (243) of the third transverse groove (241) and the bent section (2322) of the first pattern structure (23) are bent toward each other, and the bent end (243) of the fourth transverse groove (242) is bent toward a side away from the first pattern structure (23).

7. The tire tread structure according to claim 6, characterized in that: The extension direction of the straight end (244) of the third transverse groove (241) is set at a third angle A3 with the width direction of the tire, and the extension direction of the straight end (244) of the fourth transverse groove (242) is set at a fourth angle A4 with the width direction of the tire, and the third angle A3 and the fourth angle A4 satisfy: 32°≤A3≤38°, 32°≤A4≤38.

8. The tire tread structure according to claim 6, wherein: The second pattern group (40) further includes: a first recess (41), in one set of the second pattern groups (40), the first recess (41) being arranged on a side of the fourth transverse groove (242) away from the first pattern structure (23); wherein the first recess (41) is arranged in a polygonal shape; A separation groove (42) is provided between the bent end (243) of the fourth transverse groove (242) and the first recess (41).

9. The tire tread structure according to claim 6, wherein: The crown pattern portion arranged near the inner side of the tire is an inner crown pattern portion (3), the connecting groove (22) is arranged on the inner crown pattern portion (3), there are a plurality of connecting grooves (22), and the plurality of connecting grooves (22) are arranged at intervals along the circumference of the tire, and the plurality of transverse grooves (20) further include: a third tread structure (25) located between two adjacent connecting grooves (22), the third tread structure (25) comprising a fifth transverse groove (251) and a sixth transverse groove (252) spaced apart in the width direction of the tire, the end of the fifth transverse groove (251) away from the sixth transverse groove (252) being connected to the longitudinal groove (10) located on one side of the inner crown pattern portion (3), and the end of the sixth transverse groove (252) away from the fifth transverse groove (251) being connected to the longitudinal groove (10) located on the other side of the inner crown pattern portion (3); Wherein, the fifth transverse groove (251) is arc-shaped; and / or the sixth transverse groove (252) is arc-shaped.

10. The tire tread structure according to claim 9, characterized in that: The fifth transverse groove (251) and the sixth transverse groove (252) are both arranged in an arc shape; The extending direction of the third pattern structure (25) and the width direction of the tire form a fifth angle A5, and the extending direction of the connecting groove (22) and the width direction of the tire form a sixth angle A6, and the fifth angle A5 and the sixth angle A6 satisfy: 38°≤A5≤42°, 38°≤A6≤42°.

11. The tire tread structure according to claim 9, wherein: The tire tread structure further comprises: a structural reinforcement protrusion (50), the structural reinforcement protrusion (50) being arranged on the groove bottom of the fifth transverse groove (251) at one end away from the sixth transverse groove (252) to connect the two groove walls of the fifth transverse groove (251); and / or, The structural reinforcement protrusion (50) is arranged on the groove bottom of the sixth transverse groove (252) at one end away from the fifth transverse groove (251) to connect the two groove walls of the sixth transverse groove (252).

12. The tire tread structure according to claim 9, wherein: In the direction from the shoulder pattern portion to the center plane S of the tire, the connecting groove (22) includes a first sub-connecting groove (221), a second sub-connecting groove (222) and a third sub-connecting groove (223) which are connected in sequence, and the first sub-connecting groove (221) and the third sub-connecting groove (223) are used to connect the longitudinal groove (10); wherein the depth G3 of the first sub-connecting groove (221), the depth G4 of the second sub-connecting groove (222) and the depth G5 of the third sub-connecting groove (223) satisfy the following conditions: G4<G3, G4<G5.

13. The tire tread structure according to claim 1, wherein: The two shoulder pattern portions include an inner shoulder pattern portion (4) arranged close to the inner side of the tire, The first transverse groove (21) is provided on the inner shoulder pattern portion (4); wherein the depth G1 of the first sub-transverse groove (211) and the depth G2 of the second sub-transverse groove (212) satisfy the following relationship: 0.25G1≤G2≤0.5G1; and / or, The extending direction of the first transverse groove (21) forms a seventh angle A7 with the width direction of the tire, and the seventh angle A7 satisfies: 7°≤A7≤11°.

14. The tire tread structure according to claim 13, wherein: The two shoulder pattern portions further include an outer shoulder pattern portion (5) arranged close to the outer side of the tire, and the tire tread structure further includes: A longitudinal groove (90) is provided on the outer shoulder pattern portion (5) and extends along the circumference of the tire; a seventh transverse groove (60) disposed on the outer shoulder pattern portion (5) and located on a side of the longitudinal groove (90) away from the longitudinal groove (10), wherein one end of the seventh transverse groove (60) close to the longitudinal groove (90) is connected to the longitudinal groove (90); an eighth transverse groove (70) disposed on the outer shoulder pattern portion (5), wherein at least a portion of the eighth transverse groove (70) is located on a side of the longitudinal groove (90) away from the longitudinal groove (10), and an end of the eighth transverse groove (70) close to the longitudinal groove (10) passes through the longitudinal groove (90); A recess group (80) is provided on the outer shoulder pattern portion (5) and is located on a side of the longitudinal groove (90) close to the longitudinal groove (10), the recess group (80) includes a plurality of second recesses (81), the plurality of second recesses (81) are arranged in a circumferential manner, and the second recesses (81) are arranged in a polygonal shape; The width W1 of the longitudinal groove (90), the width W2 of the seventh transverse groove (60), and the width W3 of the eighth transverse groove (70) satisfy the following conditions: 0.6 mm ≤ W1 ≤ 1.5 mm, 0.6 mm ≤ W2 ≤ 1 mm, and 1.5 mm < W3 ≤ 2.5 mm.

15. The tire tread structure according to claim 14, characterized in that: There is a contact area between the tread and the running surface, The outer shoulder pattern portion (5) located on the side of the longitudinal groove (90) close to the longitudinal groove (10) has a width W4, and the outer shoulder pattern portion (5) located on the side of the longitudinal groove (90) away from the longitudinal groove (10) has a width W5, and the width W4 and the width W5 satisfy: W5>W4; The seventh transverse groove (60) is arranged at an eighth angle A8 between the extension direction of the portion located in the contact area and the width direction of the tire, and the eighth transverse groove (70) is arranged at a ninth angle A9 between the extension direction of the portion located in the contact area and the width direction of the tire, and the eighth angle A8 and the ninth angle A9 satisfy the following conditions: 6°≤A8≤8°, 6°≤A9≤8°.

16. The tire tread structure according to claim 1, wherein: The tire tread structure includes a plurality of pitch units arranged along the circumference of the tire, the plurality of pitch units including a first pitch unit, a second pitch unit and a third pitch unit, and the pitch P1 of the first pitch unit, the pitch P2 of the second pitch unit and the pitch P3 of the third pitch unit satisfy the following conditions: 1.142P1≤P2≤1.202P1, 1.384P1≤P3≤1.444P1.

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