Tire tread structure

Abstract

The utility model provides a tire tread structure. The tire tread structure comprises a plurality of longitudinal grooves which extend in the circumferential direction of a tire and are arranged at intervals in the width direction of the tire so as to divide a tire tread into two tire shoulder pattern parts and a plurality of middle pattern parts located between the two tire shoulder pattern parts, the longitudinal grooves located between every two adjacent middle pattern parts comprise a plurality of linear grooves and a plurality of arc-shaped grooves which are communicated with each other, and each arc-shaped groove is located between every two adjacent linear grooves; the first transverse groove is formed in the tire shoulder pattern part, one end of the first transverse groove is located in the tire shoulder pattern part, and the other end of the first transverse groove is communicated with the longitudinal groove; wherein a first concave part is arranged at the bottom of the first transverse groove. According to the wide-base tire, the problem that the service life of the wide-base tire in the prior art is relatively short is effectively solved.

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, as the world pays more and more attention to energy conservation and environmental protection, reducing tire rolling resistance has become an important development direction of the tire industry. Wide-base tires with lightweight and low rolling resistance characteristics have received strong support and promotion at the regulatory level, especially in the fields of freight vehicles, passenger vehicles and new energy vehicles.

[0003] However, for freight and passenger vehicles, the service life of the wide-base tires they are equipped with is relatively short. The main reasons include:

[0004] 1. Due to the heavy load of freight and passenger vehicles, the bottom of the groove of the tire tread pattern structure is prone to cracks and damage, and the tire pattern structure wears out quickly, especially in the case of stone sandwiches. Irregularly shaped stones will rub violently against the inner wall of the groove under the heavy weight of the squeeze and the rolling process of the tire, seriously affecting the service life of the tire.

[0005] 2. The heat generated by wide-base tires during rolling is easily accumulated at the tire shoulders. When the temperature rises, the tire shoulders wear faster under the action of heavy loads, seriously affecting the service life of the tire. Utility Model Content

[0006] The main purpose of the utility model is to provide a tire tread structure to solve the problem of short service life of wide-base tires in the prior art.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a tire tread structure, comprising: a plurality of longitudinal grooves, the longitudinal grooves extending along the circumference of the tire, the plurality of longitudinal grooves being arranged at intervals along the width direction of the tire to separate the tread into two shoulder pattern portions and a plurality of intermediate pattern portions located between the two shoulder pattern portions, the longitudinal grooves located between two adjacent intermediate pattern portions comprising a plurality of mutually connected straight grooves and a plurality of arc-shaped grooves, the arc-shaped grooves being located between two adjacent straight grooves; a first transverse groove, arranged on the shoulder pattern portion, one end of the first transverse groove being located in the shoulder pattern portion, and the other end of the first transverse groove being connected to the longitudinal groove; wherein a first recess is provided at the bottom of the first transverse groove.

[0008] Furthermore, one end of the first recess extends to the side surface of the shoulder pattern portion to communicate with the longitudinal groove; and / or the longitudinal groove adjacent to the shoulder pattern portion is a linear groove.

[0009] Furthermore, there are multiple first transverse grooves and include: multiple first transverse grooves, which are arranged at intervals along the circumference of the tire; multiple second transverse grooves, which are arranged at intervals along the circumference of the tire; wherein the second transverse groove is located between two adjacent first transverse grooves, and the length of the first transverse groove is greater than the length of the second transverse groove.

[0010] Further, the first transverse groove includes a first sub-transverse groove, a second sub-transverse groove and a third sub-transverse groove that are interconnected, the second sub-transverse groove is located between the first sub-transverse groove and the third sub-transverse groove, the first sub-transverse groove is arranged away from the longitudinal groove relative to the third sub-transverse groove, the third sub-transverse groove is connected to the longitudinal groove, the third sub-transverse groove and the second sub-transverse groove are arranged at a first angle A1, and the first sub-transverse groove and the second sub-transverse groove are arranged at a second angle A2; and / or, the second transverse groove includes a fourth sub-transverse groove and a fifth sub-transverse groove that are interconnected, the fourth sub-transverse groove is arranged away from the longitudinal groove relative to the fifth sub-transverse groove, the fifth sub-transverse groove is connected to the longitudinal groove, and the fourth sub-transverse groove and the fifth sub-transverse groove are arranged at a third angle A3.

[0011] Furthermore, there are multiple first recesses including shoulder recesses and middle recesses, the shoulder recesses are arranged at the bottom of the first transverse groove, and the tire tread structure also includes: a connecting groove, which is arranged on the middle pattern portion, and the connecting groove is used to connect the two longitudinal grooves adjacent to the middle pattern portion; wherein, the middle recess is arranged at the bottom of the connecting groove.

[0012] Furthermore, there are multiple intermediate recesses, at least one intermediate recess is provided at both ends of the connecting groove, and at least two intermediate recesses are respectively connected to the two longitudinal grooves adjacent to the intermediate pattern portion. The tire tread structure also includes: a second recess, provided at the bottom of the connecting groove, and a second recess is provided between the intermediate recesses at both ends of the connecting groove; wherein the length of the second recess is greater than the length of the intermediate recess.

[0013] Furthermore, the connecting groove includes a first sub-connecting groove, a second sub-connecting groove and a third sub-connecting groove that are connected to each other, the second sub-connecting groove is located between the first sub-connecting groove and the third sub-connecting groove, and the first sub-connecting groove and the third sub-connecting groove are respectively connected to the longitudinal groove adjacent to the middle pattern portion; wherein, the first sub-connecting groove and the second sub-connecting groove are set at a fourth angle A4, and the second sub-connecting groove and the third sub-connecting groove are set at a fifth angle A5.

[0014] Furthermore, there are multiple connecting grooves, and the multiple connecting grooves are arranged at intervals along the circumference of the tire to separate the middle pattern portion into multiple middle pattern blocks. The tire tread structure also includes: a third recess, arranged on the middle pattern block, the third 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 middle pattern portion at one end away from the second sub-recess at one end to be connected with the longitudinal groove, and the second sub-recess is located in the middle pattern block at one end away from the first sub-recess; wherein, an middle recess is provided on the bottom wall of the end where the first sub-recess is connected to the longitudinal groove.

[0015] Furthermore, the multiple intermediate tread portions include a crown tread portion and a center tread portion, the crown tread portion is adjacent to the shoulder tread portion, the center tread portion is located between the two crown tread portions, and a preset distance S1 is provided between the end of the second recess provided on the crown tread portion and the side of the crown tread portion, and the preset distance S1 satisfies: S1>8mm; the second recess provided on the center tread portion has a depth G1, the middle recess provided on the center tread portion has a depth G2, the longitudinal groove has a depth G3, and the depth G1, the depth G2 and the depth G3 satisfy: G1≥0.7G3, G2≥0.7G3; the second recess provided on the center tread portion has a length L1, the center tread portion has a width W2, and the length L and the width W2 satisfy: 0.2W2≤L1≤0.3W2.

[0016] Furthermore, the tire tread structure further comprises a plurality of pitch units arranged along the circumference of the tire, the plurality of pitch units comprising a first pitch unit, a second pitch unit, and a third pitch unit, wherein 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: 0.92P2≤P1≤0.95P2, and 1.05P1≤P3≤1.1P2. A third recess is provided on both the crown tread portion and the center tread portion; alternatively, the third recess is provided on the crown tread portion. The tire tread structure further comprises a zigzag groove provided on an intermediate tread block within the center tread portion, a preset distance being provided between the end of the zigzag groove and the side of the intermediate tread block, and a fourth recess is provided on the bottom of the zigzag groove.

[0017] According to the technical solution of the present invention, a plurality of longitudinal grooves of a tire tread structure extend along the circumference of the tire. The plurality of longitudinal grooves are spaced apart along the width direction of the tire to separate the tread into two shoulder pattern portions and a plurality of intermediate pattern portions located between the two shoulder pattern portions. The longitudinal grooves located between two adjacent intermediate pattern portions include a plurality of interconnected linear grooves and a plurality of arcuate grooves, wherein the arcuate grooves are located between two adjacent linear grooves. A first transverse groove is provided on the shoulder pattern portion, one end of the first transverse groove is located within the shoulder pattern portion, and the other end of the first transverse groove is connected to the longitudinal groove. A first recess is provided at the bottom of the first transverse groove. Thus, the arrangement of the linear grooves and the arcuate grooves results in the longitudinal grooves at the position where the tire contacts the ground (the intermediate pattern portion) being arranged in a zigzag shape. While reducing the probability of stone trapping and improving the tire's stone removal performance, the arcuate bending transition zone can reduce the strain at the bottom of the longitudinal grooves, thereby reducing the possibility of groove cracking, thereby preliminarily extending the service life of the tire. At the same time, the design of the first transverse groove and the first recess can ensure that the total depth of the first transverse groove and the first recess is large enough to improve the heat dissipation performance of the shoulder pattern portion and reduce the risk of damage to the shoulder pattern portion caused by heat accumulation. At the same time, it avoids the depth of the first transverse groove with a larger width from being too large, thereby improving the overall rigidity of the shoulder pattern portion, reducing the wear rate of the shoulder pattern portion, further extending the service life of the tire, and thus solving the problem of short service life of wide-base tires in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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:

[0019] Figure 1 A partial front view of a first embodiment of a tire tread structure according to the present invention is shown;

[0020] Figure 2 Shown Figure 1 A partial enlarged schematic diagram of a portion of the tire tread structure;

[0021] Figure 3 Shown Figure 1 A partial front view of a second embodiment of the tire tread structure;

[0022] Figure 4 Shown Figure 3 An enlarged schematic diagram of the tire tread structure at point b.

[0023] The above drawings include the following reference numerals:

[0024] 1. Longitudinal groove; 11. Straight groove; 12. Arc groove;

[0025] 2. Shoulder tread;

[0026] 3. Middle tread portion; 31. Middle tread block; 32. Crown tread portion; 33. Center tread portion;

[0027] 4, first transverse groove; 41, first transverse groove; 411, first sub-transverse groove; 412, second sub-transverse groove; 413, third sub-transverse groove; 42, second transverse groove; 421, fourth sub-transverse groove; 422, fifth sub-transverse groove;

[0028] 5. First recess; 51. Shoulder recess; 52. Middle recess;

[0029] 6, connecting groove; 61, first sub-connecting groove; 62, second sub-connecting groove; 63, third sub-connecting groove;

[0030] 7. The second concave part;

[0031] 8. The third recess; 81. The first sub-recess; 82. The second sub-recess;

[0032] 9. Broken line groove;

[0033] 10. The fourth concave part. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] 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.

[0037] In order to solve the problem of short service life of wide-base tires in the prior art, the present application provides a tire tread structure.

[0038] Example 1

[0039] like Figure 1 and Figure 2 As shown, the tire tread structure includes a plurality of longitudinal grooves 1 and first transverse grooves 4. The longitudinal grooves 1 extend along the circumference of the tire and are spaced apart along the width of the tire to divide the tread into two shoulder pattern sections 2 and a plurality of intermediate pattern sections 3 located between the two shoulder pattern sections 2. The longitudinal grooves 1 located between two adjacent intermediate pattern sections 3 include a plurality of interconnected straight grooves 11 and a plurality of arcuate grooves 12, with the arcuate grooves 12 located between two adjacent straight grooves 11. The first transverse groove 4 is provided on the shoulder pattern section 2, with one end of the first transverse groove 4 located within the shoulder pattern section 2 and the other end of the first transverse groove 4 communicating with the longitudinal groove 1. A first recess 5 is provided at the bottom of the first transverse groove 4.

[0040] Applying the technical solution of this embodiment, the tire tread structure comprises a plurality of longitudinal grooves 1 extending along the circumference of the tire. The plurality of longitudinal grooves 1 are spaced apart along the width direction of the tire to divide the tread into two shoulder pattern portions 2 and a plurality of intermediate pattern portions 3 located between the two shoulder pattern portions 2. The longitudinal grooves 1 located between two adjacent intermediate pattern portions 3 include a plurality of interconnected linear grooves 11 and a plurality of arcuate grooves 12, with the arcuate grooves 12 located between two adjacent linear grooves 11. A first transverse groove 4 is provided on the shoulder pattern portion 2, with one end of the first transverse groove 4 located within the shoulder pattern portion 2 and the other end of the first transverse groove 4 communicating with the longitudinal groove 1. A first recess 5 is provided at the bottom of the first transverse groove 4. In this way, the arrangement of the straight groove 11 and the arc-shaped groove 12 makes the longitudinal groove 1 at the contact point between the tire and the ground core (the middle pattern portion 3) zigzag. While the above arrangement reduces the probability of stone clamping and improves the stone removal performance of the tire, the arc-shaped bending transition zone can reduce the groove bottom strain of the longitudinal groove 1 to reduce the possibility of groove cracking, thereby preliminarily extending the service life of the tire. At the same time, the design of the first transverse groove 4 and the first recess 5 can ensure that the total depth of the first transverse groove 4 and the first recess 5 is large enough to improve the heat dissipation performance of the shoulder pattern portion 2 and reduce the risk of damage to the shoulder pattern portion 2 due to heat accumulation. At the same time, the first transverse groove 4 with a larger width is prevented from being too deep, thereby improving the overall rigidity of the shoulder pattern portion 2 and reducing the wear rate of the shoulder pattern portion 2, further extending the service life of the tire, and thus solving the problem of the short service life of wide-base tires in the prior art.

[0041] In this embodiment, there are five longitudinal grooves 1 , which are spaced apart in the width direction of the tire to divide the tread into two shoulder pattern portions 2 and four middle pattern portions 3 between the two shoulder pattern portions 2 .

[0042] Specifically, compared to a conventional three-longitudinal groove design, the five longitudinal grooves 1 in this embodiment significantly enhance the tire's drainage performance, reducing the water film effect (i.e., the formation of a complete water film between the road surface and the tire tread, which reduces the friction coefficient of the tire tread) when the tire is driving on slippery roads. This improves the adhesion between the tire and the ground, thereby enhancing the vehicle's driving stability. It also provides the tire with better anti-skid capabilities when turning.

[0043] In this embodiment, the first recess 5 is a narrow groove formed by a steel sheet mold during the tire molding process.

[0044] In this embodiment, the arc-shaped groove 12 is a circular arc groove, and its diameter R satisfies: 20 mm ≤ R ≤ 30 mm.

[0045] Specifically, the arc-shaped groove can provide better grip when the vehicle is turning to reduce the risk of slipping, improve braking and cornering performance, require less driving force when the vehicle is driving, and reduce fuel consumption.

[0046] In this embodiment, two linear grooves 11 adjacent to the arc-shaped groove 12 are arranged at a sixth angle A6 therebetween, and the sixth angle A6 satisfies: 150°≤A6≤160°.

[0047] Optionally, one end of the first recess 5 extends to the side of the shoulder pattern portion 2 to communicate with the longitudinal groove 1; and / or the longitudinal groove 1 adjacent to the shoulder pattern portion 2 is a linear groove. Thus, when heat within the shoulder pattern portion 2 is transferred to the first recess 5, the connection between the first recess 5 and the longitudinal groove 1 allows the heat to be quickly carried away by the airflow within the longitudinal groove 1, further improving the tire's heat dissipation performance. Furthermore, by designing the longitudinal groove 1 adjacent to the shoulder pattern portion 2 as a linear groove, the airflow velocity within the longitudinal groove 1 is increased, helping to reliably dissipate heat from the entire shoulder pattern portion 2, further preventing abnormal wear caused by heat accumulation and extending the tire's service life.

[0048] like Figure 1As shown, the first transverse grooves 4 are multiple and include multiple first transverse grooves 41 and multiple second transverse grooves 42. The multiple first transverse grooves 41 are spaced apart along the circumference of the tire. The multiple second transverse grooves 42 are spaced apart along the circumference of the tire. The second transverse grooves 42 are located between two adjacent first transverse grooves 41, and the length of the first transverse grooves 41 is greater than the length of the second transverse grooves 42. In this way, the first transverse grooves 4 arranged at intervals of long (first transverse grooves 41) and short (second transverse grooves 42) can balance the rigidity of the shoulder pattern portion 2 while ensuring that the shoulder pattern portion 2 has sufficient rigidity (avoiding the rigidity of the shoulder pattern portion 2 being too low due to the full-length first transverse grooves 4), thereby enhancing the driving stability of the vehicle and ensuring that the shoulder pattern portion 2 can provide sufficient grip when the vehicle is turning.

[0049] Optionally, the first transverse groove 41 includes a first sub-transverse groove 411, a second sub-transverse groove 412 and a third sub-transverse groove 413 that are interconnected, the second sub-transverse groove 412 is located between the first sub-transverse groove 411 and the third sub-transverse groove 413, the first sub-transverse groove 411 is arranged away from the longitudinal groove 1 relative to the third sub-transverse groove 413, the third sub-transverse groove 413 is connected to the longitudinal groove 1, and the third sub-transverse groove 413 and the second sub-transverse groove 412 are connected to each other. An angle A1 is set, and the first sub-transverse groove 411 and the second sub-transverse groove 412 are set at a second angle A2; and / or, the second transverse groove 42 includes a fourth sub-transverse groove 421 and a fifth sub-transverse groove 422 that are connected to each other, the fourth sub-transverse groove 421 is set away from the longitudinal groove 1 relative to the fifth sub-transverse groove 422, the fifth sub-transverse groove 422 is connected to the longitudinal groove 1, and the fourth sub-transverse groove 421 and the fifth sub-transverse groove 422 are set at a third angle A3.

[0050] Specifically, the first transverse groove 41 and the second transverse groove 42 in this embodiment actually adopt a broken line groove design to increase the heat dissipation area of ​​the first transverse groove 41 and the second transverse groove 42 within a limited length, thereby further improving the heat dissipation performance of the tire.

[0051] In this embodiment, the first sub-transverse groove 411 and the third sub-transverse groove 413 extend along the width of the tire, and the values ​​of the first angle A1 and the second angle A2 can be adjusted adaptively based on the actual size of the tire. The first angle A1 and the second angle A2 should be obtuse to buffer stress concentration at the groove corners and extend the service life of the tire.

[0052] Optionally, the first angle A1 and the second angle A2 satisfy: 140°≤A1≤150°, 140°≤A2≤150°.

[0053] In this embodiment, the fifth sub-transverse groove 422 extends along the width of the tire, and the value of the third angle A3 can be adjusted adaptively based on the actual tire size. The third angle A3 should be an obtuse angle to buffer stress concentration at the groove corners and extend the tire's service life.

[0054] Optionally, the third angle A3 satisfies: 140°≤A3≤150°.

[0055] Optionally, the first recesses 5 are multiple and include shoulder recesses 51 and intermediate recesses 52. The shoulder recesses 51 are located at the bottom of the first transverse grooves 4. The tire tread structure also includes a connecting groove 6, which is located on the intermediate tread portion 3 and serves to connect the two longitudinal grooves 1 adjacent to the intermediate tread portion 3. The intermediate recess 52 is located at the bottom of the connecting groove 6. This allows the connecting groove 6 to circulate accumulated water and gas, thereby improving the tire's drainage and heat dissipation performance. Furthermore, the intermediate recess 52 located at the bottom of the connecting groove 6 also helps increase the overall depth of the connecting groove 6 and the intermediate recess 52, thereby providing deep heat dissipation for the tire and improving the rigidity of the intermediate tread portion 3, thereby enhancing the tire's grip and driving stability.

[0056] Specifically, the edge of the connecting groove 6 can also play a role in cutting the water film, that is, during the rolling process of the tire, the edge of the connecting groove 6 (the ridge of the pattern block) is like a blade, cutting the water film between the tire and the driving surface, thereby avoiding the formation of a complete water film and further improving the tire's anti-skid performance.

[0057] Optionally, there are multiple intermediate recesses 52, with at least one intermediate recess 52 provided at each end of the connecting groove 6, and at least two intermediate recesses 52 respectively communicating with the two longitudinal grooves 1 adjacent to the intermediate pattern portion 3. The tire tread structure further includes a second recess 7, which is provided at the bottom of the connecting groove 6 and located between the intermediate recesses 52 at both ends of the connecting groove 6. The length of the second recess 7 is greater than that of the intermediate recess 52. In this way, the heat transferred from the intermediate recesses 52 at both ends of the connecting groove 6 can be carried away by the two longitudinal grooves 1, respectively, to further enhance the heat dissipation performance of the tire. Furthermore, the provision of the longer second recess 7 allows new grooves to be formed in the middle and late stages of the tire's use (when the tread has been partially worn and deformed by tread pressure, the second recess 7 can come into contact with the ground) to compensate for the tire's braking performance and muddy performance, further extending the tire's service life.

[0058] In this embodiment, the second recess 7 is a narrow groove formed by a steel sheet mold during the tire molding process.

[0059] In this embodiment, the connecting groove 6 includes a first sub-connecting groove 61, a second sub-connecting groove 62, and a third sub-connecting groove 63, which are interconnected. The second sub-connecting groove 62 is located between the first sub-connecting groove 61 and the third sub-connecting groove 63. The first sub-connecting groove 61 and the third sub-connecting groove 63 are each connected to the longitudinal groove 1 adjacent to the middle tread portion 3. The first sub-connecting groove 61 and the second sub-connecting groove 62 are arranged at a fourth angle A4, while the second sub-connecting groove 62 and the third sub-connecting groove 63 are arranged at a fifth angle A5. Thus, the connecting groove 6 also adopts a broken line design, increasing the heat dissipation area of ​​the connecting groove 6 within a limited length, further improving the heat dissipation performance of the tire. This arrangement also enhances the tire's appearance.

[0060] In this embodiment, the first sub-connecting groove 61 and the third sub-connecting groove 63 extend along the width direction of the tire, and the fourth angle A4 and the fifth angle A5 should be obtuse angles to buffer the stress concentration at the groove corners, avoid damage such as gnawing of the middle pattern portion 3, and further extend the service life of the tire.

[0061] Optionally, the fourth angle A4 and the fifth angle A5 satisfy: 140°≤A4≤150°, 140°≤A5≤150°.

[0062] Optionally, multiple connecting grooves 6 are provided, spaced apart along the circumference of the tire to separate the middle tread portion 3 into a plurality of middle tread blocks 31. The tire tread structure further includes a third recess 8 disposed on the middle tread block 31. The third recess 8 comprises a first sub-recess 81 and a second sub-recess 82, interconnected with each other. The end of the first sub-recess 81, distal from the second sub-recess 82, extends to the side of the middle tread portion 3 to communicate with the longitudinal groove 1. The end of the second sub-recess 82, distal from the first sub-recess 81, is located within the middle tread block 31. An intermediate recess 52 is provided on the bottom wall of the end of the first sub-recess 81 that communicates with the longitudinal groove 1. This arrangement, on the one hand, further enhances the tire's wet skid resistance by cutting through the water film between the tread and the running surface through the third recess 8. On the other hand, the design of the third recess 8 and the intermediate recess 52, as described above, also enhances the tire's heat dissipation while ensuring sufficient rigidity of the tread portion.

[0063] In this embodiment, the included angle between the first sub-recess 81 and the second sub-recess 82 is also an obtuse angle, and the first sub-recess 81 extends along the width direction of the tire.

[0064] Optionally, the width W1 of the third recess 8 satisfies: 1 mm ≤ W1 ≤ 3 mm.

[0065] Optionally, the plurality of intermediate tread sections 3 include a crown section 32 and a center section 33. The crown section 32 is adjacent to the shoulder sections 2, and the center section 33 is located between the two crown sections 32. A predetermined distance S1 is defined between the end of the second recess 7 provided in the crown section 32 and the side of the crown section 32. The predetermined distance S1 satisfies: S1 > 8 mm. The second recess 7 provided in the center section 33 has a depth G1, the intermediate recess 52 provided in the center section 33 has a depth G2, and the longitudinal groove 1 has a depth G3. The depths G1, G2, and G3 satisfy the following conditions: G1 ≥ 0.7G3, and G2 ≥ 0.7G3. The second recess 7 provided in the center section 33 has a length L1, and the center section 33 has a width W2. The length L and width W2 satisfy the following conditions: 0.2W2 ≤ L1 ≤ 0.3W2. In this way, the above-mentioned size limitation enables the size of each structure to match the actual size of the tire, so as to ensure that the function of each structure can be stably realized.

[0066] Optionally, the depth G1 and the depth G2 satisfy: 9 mm ≤ G1 ≤ 12 mm, 9 mm ≤ G2 ≤ ​​12 mm.

[0067] Optionally, the length L2 of the middle recess 52 provided on the center tread portion 33 satisfies: 3 mm ≤ L2 ≤ 5 mm.

[0068] Specifically, the above-mentioned structural design in this embodiment actually forms a pattern structure on the tread of the tire. With the center plane S of the tire as the boundary, the pattern structure adopts a centrally symmetrical design, that is, the pattern structure on one side of the center plane S can be rotated 180° and then overlap with the pattern structure on the other side of the center plane S.

[0069] Specifically, with Figure 1 For example, the first transverse groove 4 on the shoulder pattern portion 2 located on the left side of the center plane S is inclined downward, the connecting groove 6 and the third recess 8 on the crown pattern portion 32 located on the left side of the center plane S are inclined upward, the connecting groove 6 and the third recess 8 on the center pattern portion 33 located on the left side of the center plane S are inclined downward, and the pattern structure located on the right side of the center plane S is centrally symmetrical with the pattern structure on the left side to form a non-guided pattern structure.

[0070] In this embodiment, the third recessed portion 8 is provided on both the crown pattern portion 32 and the center pattern portion 33 .

[0071] Optionally, the tire tread structure further comprises a plurality of pitch units arranged along the circumference of the tire, the plurality of pitch units comprising a first pitch unit, a second pitch unit, and a third pitch unit, wherein 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: 0.92P2≤P1≤0.95P2, and 1.05P1≤P3≤1.1P2. This arrangement makes the pattern structure on the tire tread more complex, thereby interfering with noise and preventing the occurrence of noise resonance, thereby reducing tire driving noise and improving driving comfort for the driver.

[0072] This embodiment also provides a tire (not shown), which includes the tire tread structure described above.

[0073] Example 2

[0074] The difference between the tire tread structures in the second embodiment and the first embodiment is that the structure of the center pattern portion 33 is different.

[0075] like Figure 3 and Figure 4 As shown, the third recess 8 in this embodiment is only provided on the crown pattern portion 32. The tire tread structure further includes a zigzag groove 9, which is provided on the intermediate pattern block 31 located within the central pattern portion 33. A preset distance is provided between the end of the zigzag groove 9 and the side surface of the intermediate pattern block 31. A fourth recess 10 is provided on the bottom of the zigzag groove 9. In this embodiment, the third recess 8 is eliminated at the core contact position between the tread and the ground (the central pattern portion 33). Instead, the zigzag groove 9 actually adopts a non-through design (the two ends of the zigzag groove 9 located within the central pattern portion 33 are not connected to the two side surfaces of the central pattern portion 33). This non-through design can further enhance the structural strength and rigidity of the central pattern portion 33, thereby preventing damage such as falling blocks and further extending the service life of the tire.

[0076] In this embodiment, the fourth recess 10 is a narrow groove formed by a steel sheet mold during the tire molding process.

[0077] In this embodiment, the fourth recess 10 is similar to the broken line groove 9 and is also a non-through design.

[0078] In this embodiment, the zigzag groove 9 is designed in a "Z" shape (basically the same structure as the connecting groove 6), and a fourth recess 10 is also provided on the groove bottom at the middle end.

[0079] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0080] The tire tread structure comprises a plurality of longitudinal grooves extending circumferentially along the tire. The plurality of longitudinal grooves are spaced apart along the width of the tire to separate the tread into two shoulder pattern sections and a plurality of intermediate pattern sections located between the two shoulder pattern sections. The longitudinal grooves located between two adjacent intermediate pattern sections include a plurality of interconnected linear grooves and a plurality of arcuate grooves, wherein the arcuate grooves are located between two adjacent linear grooves. A first transverse groove is provided on the shoulder pattern section, one end of the first transverse groove being located within the shoulder pattern section, and the other end of the first transverse groove being connected to the longitudinal groove. A first recess is provided at the bottom of the first transverse groove. Thus, the arrangement of the linear grooves and the arcuate grooves results in the longitudinal grooves being arranged in a zigzag shape at the contact point between the tire and the ground (the intermediate pattern section). While reducing the probability of stone trapping and improving the tire's stone removal performance, the arcuate bending transition zone can reduce the strain at the bottom of the longitudinal grooves, thereby reducing the possibility of groove cracking, thereby preliminarily extending the tire's service life. At the same time, the design of the first transverse groove and the first recess can ensure that the total depth of the first transverse groove and the first recess is large enough to improve the heat dissipation performance of the shoulder pattern portion and reduce the risk of damage to the shoulder pattern portion caused by heat accumulation. At the same time, it avoids the depth of the first transverse groove with a larger width from being too large, thereby improving the overall rigidity of the shoulder pattern portion, reducing the wear rate of the shoulder pattern portion, further extending the service life of the tire, and thus solving the problem of short service life of wide-base tires in the prior art.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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 (1), the longitudinal grooves (1) extending along the circumference of the tire, the plurality of longitudinal grooves (1) being spaced apart along the width direction of the tire to separate the tread into two shoulder pattern portions (2) and a plurality of intermediate pattern portions (3) located between the two shoulder pattern portions (2), the longitudinal grooves (1) located between two adjacent intermediate pattern portions (3) comprising a plurality of mutually connected straight grooves (11) and a plurality of arc-shaped grooves (12), the arc-shaped grooves (12) being located between two adjacent straight grooves (11); a first transverse groove (4) provided on the shoulder tread portion (2), one end of the first transverse groove (4) being located in the shoulder tread portion (2), and the other end of the first transverse groove (4) being connected to the longitudinal groove (1); Wherein, a first recess (5) is provided at the bottom of the first transverse groove (4).

2. The tire tread structure according to claim 1, characterized in that: One end of the first recess (5) extends to the side of the shoulder pattern portion (2) to communicate with the longitudinal groove (1); and / or, The longitudinal groove (1) adjacent to the shoulder pattern portion (2) is a linear groove.

3. The tire tread structure according to claim 1 or 2, characterized in that: The first transverse grooves (4) are multiple and include: A plurality of first transverse grooves (41) are arranged at intervals along the circumference of the tire; a plurality of second transverse grooves (42) spaced apart along the circumference of the tire; The second transverse groove (42) is located between two adjacent first transverse grooves (41), and the length of the first transverse groove (41) is greater than the length of the second transverse groove (42).

4. The tire tread structure according to claim 3, characterized in that: The first transverse groove (41) includes a first sub-transverse groove (411), a second sub-transverse groove (412) and a third sub-transverse groove (413) which are interconnected, the second sub-transverse groove (412) is located between the first sub-transverse groove (411) and the third sub-transverse groove (413), the first sub-transverse groove (411) is arranged away from the longitudinal groove (1) relative to the third sub-transverse groove (413), the third sub-transverse groove (413) is connected to the longitudinal groove (1), the third sub-transverse groove (413) and the second sub-transverse groove (412) are arranged at a first angle A1, and the first sub-transverse groove (411) and the second sub-transverse groove (412) are arranged at a second angle A2; and / or, The second transverse groove (42) includes a fourth sub-transverse groove (421) and a fifth sub-transverse groove (422) that are connected to each other, the fourth sub-transverse groove (421) is arranged away from the longitudinal groove (1) relative to the fifth sub-transverse groove (422), the fifth sub-transverse groove (422) is connected to the longitudinal groove (1), and the fourth sub-transverse groove (421) and the fifth sub-transverse groove (422) are arranged at a third angle A3.

5. The tire tread structure according to claim 1, wherein: The first recesses (5) are multiple and include shoulder recesses (51) and middle recesses (52), the shoulder recesses (51) being arranged at the bottom of the first transverse groove (4), and the tire tread structure further includes: a connecting groove (6) provided on the middle tread portion (3), the connecting groove (6) being used to connect two longitudinal grooves (1) adjacent to the middle tread portion (3); Wherein, the middle recess (52) is provided at the bottom of the connecting groove (6).

6. The tire tread structure according to claim 5, characterized in that: There are a plurality of intermediate recesses (52), at least one intermediate recess (52) is provided at each end of the connecting groove (6), at least two intermediate recesses (52) are respectively connected to two longitudinal grooves (1) adjacent to the intermediate pattern portion (3), and the tire tread structure further comprises: A second recess (7) is provided at the bottom of the connecting groove (6), and the second recess (7) is provided between the middle recesses (52) at both ends of the connecting groove (6); Wherein, the length of the second recess (7) is greater than the length of the middle recess (52).

7. The tire tread structure according to claim 5, characterized in that: The connecting groove (6) comprises a first sub-connecting groove (61), a second sub-connecting groove (62) and a third sub-connecting groove (63) which are connected to each other, the second sub-connecting groove (62) is located between the first sub-connecting groove (61) and the third sub-connecting groove (63), and the first sub-connecting groove (61) and the third sub-connecting groove (63) are respectively connected to the longitudinal groove (1) adjacent to the middle tread portion (3); The first sub-connecting groove (61) and the second sub-connecting groove (62) are arranged at a fourth angle A4, and the second sub-connecting groove (62) and the third sub-connecting groove (63) are arranged at a fifth angle A5.

8. The tire tread structure according to claim 7, characterized in that: There are a plurality of connecting grooves (6), and the plurality of connecting grooves (6) are arranged at intervals along the circumference of the tire to separate the intermediate pattern portion (3) into a plurality of intermediate pattern blocks (31). The tire tread structure further comprises: a third recess (8) provided on the middle tread block (31), the third recess (8) comprising a first sub-recess (81) and a second sub-recess (82) which are in communication with each other, wherein one end of the first sub-recess (81) away from the second sub-recess (82) extends to the side surface of the middle tread portion (3) to be in communication with the longitudinal groove (1), and one end of the second sub-recess (82) away from the first sub-recess (81) is located within the middle tread block (31); The middle recess (52) is provided on the bottom wall of one end of the first sub-recess (81) communicating with the longitudinal groove (1).

9. The tire tread structure according to claim 8, characterized in that: The plurality of intermediate tread portions (3) include a crown tread portion (32) and a center tread portion (33), wherein the crown tread portion (32) is adjacent to the shoulder tread portion (2), and the center tread portion (33) is located between the two crown tread portions (32). There is a preset distance S1 between the end of the second recess (7) provided on the crown pattern portion (32) and the side surface of the crown pattern portion (32), and the preset distance S1 satisfies: S1>8mm; The second recess (7) provided on the central tread portion (33) has a depth G1, the intermediate recess (52) provided on the central tread portion (33) has a depth G2, the longitudinal groove (1) has a depth G3, and the depths G1, G2, and G3 satisfy the following conditions: G1≥0.7G3, G2≥0.7G3; The second recess (7) provided on the central tread portion (33) has a length L1, the central tread portion (33) has a width W2, and the length L and the width W2 satisfy the following relationship: 0.2W2≤L1≤0.3W2.

10. The tire tread structure according to claim 9, characterized in that: The tire tread structure further comprises a plurality of pitch units arranged along the circumference of the tire, the plurality of pitch units comprising a first pitch unit, a second pitch unit and a third pitch unit, wherein 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: 0.92P2≤P1≤0.95P2, 1.05P1≤P3≤1.1P2; The third recess (8) is provided on both the crown pattern portion (32) and the center pattern portion (33); or, the third recess (8) is provided on the crown pattern portion (32), and the tire tread structure further comprises a broken line groove (9), the broken line groove (9) is provided on an intermediate pattern block (31) located in the center pattern portion (33), a preset distance is provided between the end of the broken line groove (9) and the side surface of the intermediate pattern block (31), and a fourth recess (10) is provided on the groove bottom of the broken line groove (9).

Images