Tire

Abstract

The utility model provides a tire which comprises four longitudinal grooves arranged at intervals along the axial direction of the tire, each longitudinal groove extends along the circumferential direction of the tire, the tire tread of the tire is divided into five tire tread parts by the four longitudinal grooves, a plurality of transverse grooves are arranged on each tire tread part, and the transverse grooves extend along the circumferential direction of the tire. Each transverse groove is provided with two transverse groove walls which are oppositely arranged in the circumferential direction of the tire, one side of at least one transverse groove wall is provided with a first shallow groove connected with the transverse groove wall, and the extending direction of the first shallow groove is the same as that of the transverse groove wall; each longitudinal groove is provided with two longitudinal groove walls which are oppositely arranged in the axial direction of the tire, one side of at least one longitudinal groove wall is provided with a second shallow groove connected with the longitudinal groove wall, and the extending direction of the second shallow groove is the same as that of the longitudinal groove wall. The utility model solves the problem that the controllability of a tire on a wet and slippery road surface in the prior art is poorer.

Description

Technical Field

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

[0002] As the sole contact point between a vehicle and the ground, tires shoulder crucial responsibilities, including load-bearing, braking, and driving safety. They impact not only the vehicle's driving and handling performance but also the safety of its occupants. Tire performance is closely linked to its tread pattern.

[0003] The performance of tires will directly affect people's riding experience. When the road is slippery, the friction between the tires and the road surface is reduced, and the tires are prone to slipping. The tires have poor handling, which seriously affects the user's riding comfort. Utility Model Content

[0004] The main purpose of the utility model is to provide a tire to solve the problem of poor handling performance of tires in the prior art on wet and slippery roads.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a tire, which includes: four longitudinal grooves arranged at intervals along the axial direction of the tire, each longitudinal groove extending along the circumferential direction of the tire, the four longitudinal grooves dividing the tread of the tire into five tread portions, and each tread portion is provided with a plurality of transverse grooves; wherein, each transverse groove has two transverse groove walls arranged opposite to each other along the circumferential direction of the tire, at least one side of the transverse groove wall is provided with a first shallow groove connected to the transverse groove wall, and the extension direction of the first shallow groove is the same as the extension direction of the transverse groove wall; each longitudinal groove has two longitudinal groove walls arranged opposite to each other along the axial direction of the tire, at least one side of the longitudinal groove wall is provided with a second shallow groove connected to the longitudinal groove wall, and the extension direction of the second shallow groove is the same as the extension direction of the longitudinal groove wall.

[0006] Furthermore, the first shallow groove has a first shallow groove wall and a second shallow groove wall which are relatively arranged along the circumferential direction of the tire, the first shallow groove wall and the second shallow groove wall are connected to each other to form the groove bottom of the first shallow groove, and the first shallow groove wall and the transverse groove wall of the transverse groove closest to the first shallow groove are arranged in a fit manner; the second shallow groove has a third shallow groove wall and a fourth shallow groove wall which are relatively arranged along the axial direction of the tire, the third shallow groove wall and the fourth shallow groove wall are connected to each other to form the groove bottom of the second shallow groove, and the third shallow groove wall and the longitudinal groove wall of the longitudinal groove closest to the second shallow groove are arranged in a fit manner; wherein, the value range of the angle θ1 between the second shallow groove wall and the first shallow groove wall is 30°≤θ1≤45°, and the value range of the maximum angle θ2 between the fourth shallow groove wall and the third shallow groove wall is 30°≤θ2≤45°.

[0007] Furthermore, the four longitudinal grooves are respectively the first longitudinal groove, the second longitudinal groove, the third longitudinal groove and the fourth longitudinal groove, and the five tread portions are respectively the first tread portion, the second tread portion, the third tread portion, the fourth tread portion and the fifth tread portion; wherein, the transverse grooves arranged on the first tread portion are the first transverse grooves, the transverse grooves arranged on the second tread portion are the second transverse grooves, the transverse grooves arranged on the third tread portion are the third transverse grooves, the transverse grooves arranged on the fourth tread portion are the fourth transverse grooves and the fifth transverse grooves, and the transverse grooves arranged on the fifth tread portion are the sixth transverse grooves and the seventh transverse grooves.

[0008] Furthermore, the first end of each first transverse groove extends to connect with and pass through the first longitudinal groove, the second end of each first transverse groove extends to the shoulder of the tire, at least one first steel sheet is arranged between any two adjacent first transverse grooves, and each first transverse groove has two first transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove is arranged on one side of each first transverse groove wall; wherein, the angle between the first transverse groove wall and the normal line of the groove bottom of the first transverse groove is 15°, the second shallow groove wall of the first shallow groove closest to the first transverse groove is an arc-shaped surface, and the groove depth of the second end of the first transverse groove is greater than the groove depth of the first end of the first transverse groove.

[0009] Furthermore, both ends of each second transverse groove extend to connect with and penetrate the first longitudinal groove and the second longitudinal groove respectively, at least one second steel sheet is arranged between any two adjacent second transverse grooves, and each second transverse groove has two second transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove is arranged on one side of each second transverse groove wall; wherein, the angle between the second transverse groove wall and the normal line of the groove bottom of the second transverse groove is 15°, the second shallow groove wall of the first shallow groove closest to the second transverse groove is an arc-shaped surface, and the groove depth at both ends of the second transverse groove is less than the groove depth in the middle position of the second transverse groove.

[0010] Furthermore, both ends of each third transverse groove extend to connect with and penetrate the second longitudinal groove and the third longitudinal groove respectively, at least one third steel sheet is arranged between any two adjacent third transverse grooves, and each third transverse groove has two third transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove is arranged on one side of each third transverse groove wall; wherein, the angle between at least one third transverse groove wall and the groove bottom normal line of the third transverse groove is 30°, and the second shallow groove wall of the first shallow groove closest to the third transverse groove is a plane.

[0011] Furthermore, the two ends of each fourth transverse groove extend to connect and penetrate the third longitudinal groove and the fourth longitudinal groove respectively, and a fifth transverse groove and a steel plate group are arranged between any two adjacent fourth transverse grooves, one end of the fifth transverse groove is connected and penetrates the third longitudinal groove, and the other end of the fifth transverse groove is arranged toward the fourth longitudinal groove, and each fifth transverse groove has two fifth transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove is arranged on one side of each fifth transverse groove wall; wherein, the angle between at least one fifth transverse groove wall and the groove bottom normal line of the fifth transverse groove is 30°, and the second shallow groove wall of the first shallow groove closest to the fifth transverse groove is a plane; each fourth transverse groove has two fourth transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove is arranged on one side of each fourth transverse groove wall; wherein, the angle between the fourth transverse groove wall and the groove bottom normal line of the fourth transverse groove is 15°, and the fourth shallow groove wall of the first shallow groove closest to the fourth transverse groove is an arc-shaped surface, and the groove depth at both ends of the fourth transverse groove is less than the groove depth at the middle position of the fourth transverse groove.

[0012] Furthermore, each steel sheet group includes a first short steel sheet, a second short steel sheet, a third short steel sheet, a fourth short steel sheet, a fifth short steel sheet, a sixth short steel sheet and a seventh short steel sheet. The first short steel sheet, the second short steel sheet and the third short steel sheet are spaced apart along the circumferential direction of the tire. The two ends of the second short steel sheet are respectively connected to and penetrate the third longitudinal groove and the fifth transverse groove. The two ends of the third short steel sheet are respectively connected to and penetrate the third longitudinal groove and a fourth transverse groove. Among them, the fourth short steel sheet, the fifth short steel sheet and the sixth short steel sheet are spaced apart along the circumferential direction of the tire. The two ends of the sixth short steel sheet are respectively connected to and penetrate the fourth longitudinal groove and the fifth transverse groove, and the two ends of the seventh short steel sheet are respectively connected to the end of the fifth transverse groove and another fourth transverse groove. The extension direction of the first short steel sheet, the extension direction of the second short steel sheet, the extension direction of the third short steel sheet, the extension direction of the fourth short steel sheet, the extension direction of the fifth short steel sheet and the extension direction of the sixth short steel sheet are arranged in parallel, and the extension direction of the seventh short steel sheet may intersect with the extension direction of the first short steel sheet.

[0013] Furthermore, the sixth transverse groove and the seventh transverse groove are alternately arranged along the circumferential direction of the tire, the first end of the sixth transverse groove and the first end of the seventh transverse groove both extend to the shoulder of the tire, the second end of the sixth transverse groove is closed, and the second end of the seventh transverse groove extends to connect with and penetrate the fourth longitudinal groove, and a fourth steel sheet and a fifth longitudinal groove are arranged between any adjacent sixth transverse grooves and seventh transverse grooves, one end of the fourth steel sheet is arranged toward the shoulder of the tire, the other end of the fourth steel sheet is connected to and penetrates the fourth longitudinal groove, and both ends of the fifth longitudinal groove are respectively connected to and penetrate the sixth transverse groove and the seventh transverse groove; wherein, the extension direction of the fourth steel sheet, the extension direction of the sixth transverse groove and the extension direction of the seventh transverse groove are arranged in parallel, and the extension direction of the fifth longitudinal groove and the extension direction of the fourth steel sheet may be arranged to intersect.

[0014] Furthermore, each tread portion includes a plurality of tread sub-portions sequentially arranged along the circumferential direction of the tire, the length of each tread sub-portion along the circumferential direction of the tire is a preset pitch, and the preset pitch of each tread sub-portion is any one of five different pitch lengths, the five pitch lengths being a first pitch length P1, a second pitch length P2, a third pitch length P3, a fourth pitch length P4 and a fifth pitch length P5, and among the plurality of tread sub-portions, at least one tread sub-portion has a pitch length of the first pitch length P1, a second pitch length P2, a third pitch length P3, a fourth pitch length P4 and a fifth pitch length P5. length P1, the pitch length of at least one tread sub-portion is a second pitch length P2, the pitch length of at least one tread sub-portion is a third pitch length p3, the pitch length of at least one tread sub-portion is a fourth pitch length p4, and the pitch length of at least one tread sub-portion is a fifth pitch length p5; wherein, P1:P2:P3:P4:P5=1:1.101±0.03:1.213±0.03:1.333±0.03:1.469±0.03.

[0015] According to the technical solution of the present invention, the tire has four longitudinal grooves arranged at intervals along the axial direction of the tire, and the four longitudinal grooves divide the tread of the tire into five tread parts, and each tread part is provided with a plurality of transverse grooves, and each transverse groove has two transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and at least one transverse groove wall is provided with a first shallow groove connected to the transverse groove wall on one side; each longitudinal groove has two longitudinal groove walls arranged opposite to each other along the axial direction of the tire, and at least one longitudinal groove wall is provided with a second shallow groove connected to the longitudinal groove wall on one side; by arranging the transverse grooves, the contact area between the tire and the road surface can be increased, and the friction between the tire and the road surface can be increased. At the same time, the arrangement of the first shallow groove and the second shallow groove increases the envelope area of ​​the tire to water when passing through a wet and slippery road surface, avoids the tire from slipping, improves the handling of the tire, and makes the edges of the transverse grooves and the longitudinal grooves not too sharp, reducing the damage to the edges of the transverse grooves and the longitudinal grooves caused by the tire contacting the road surface, thereby solving the problem of poor handling of the tire on wet and slippery roads in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 A schematic structural diagram of an embodiment of a tire according to the present utility model is shown;

[0018] Figure 2 A schematic structural diagram of a tread sub-portion of a tire according to the present invention is shown;

[0019] Figure 3 Shown Figure 2 A schematic diagram of the partially enlarged cross-sectional structure at aa in the middle;

[0020] Figure 4 Shown Figure 2 A schematic diagram of the partially enlarged cross-sectional structure at the middle bb;

[0021] Figure 5 Shown Figure 2 A schematic diagram of the partially enlarged cross-sectional structure at cc in the middle;

[0022] Figure 6 Shown Figure 2 A schematic diagram of the partially enlarged cross-sectional structure at dd in the middle;

[0023] Figure 7 Shown Figure 2 A schematic diagram of a partially enlarged cross-sectional structure at ff in the middle;

[0024] Figure 8 Shown Figure 2 Schematic diagram of the locally enlarged cross-sectional structure at gg in the middle.

[0025] The above drawings include the following reference numerals:

[0026] 10. First shallow groove; 11. Second shallow groove; 1. First longitudinal groove; 2. Second longitudinal groove; 3. Third longitudinal groove; 4. Fourth longitudinal groove; 20. First tread portion; 30. Second tread portion; 40. Third tread portion; 50. Fourth tread portion; 60. Fifth tread portion; 21. First transverse groove; 31. Second transverse groove; 41. Third transverse groove; 51. Fourth transverse groove; 52. Fifth transverse groove; 61. Sixth transverse groove; 62. Seventh transverse groove; 22. First steel sheet; 32. Second steel sheet; 42. Third steel sheet; 551. First short steel sheet; 552. Second short steel sheet; 553. Third short steel sheet; 554. Fourth short steel sheet; 555. Fifth short steel sheet; 556. Sixth short steel sheet; 557. Seventh short steel sheet; 63. Fourth steel sheet; 64. Fifth longitudinal groove. DETAILED DESCRIPTION

[0027] 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, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0029] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0030] Please refer to Figures 1 to 8 The utility model provides a tire, the tire comprising four longitudinal grooves spaced apart in the axial direction of the tire, each longitudinal groove extending in the circumferential direction of the tire, the four longitudinal grooves dividing the tread of the tire into five tread portions, and each tread portion being provided with a plurality of transverse grooves; wherein each transverse groove has two transverse groove walls arranged opposite to each other in the circumferential direction of the tire, at least one side of the transverse groove wall being provided with a first shallow groove 10 connected to the transverse groove wall, and the extension direction of the first shallow groove 10 is the same as the extension direction of the transverse groove wall; each longitudinal groove has two longitudinal groove walls arranged opposite to each other in the axial direction of the tire, at least one side of the longitudinal groove wall being provided with a second shallow groove 11 connected to the longitudinal groove wall, and the extension direction of the second shallow groove 11 is the same as the extension direction of the longitudinal groove wall.

[0031] The tire of the present invention has four longitudinal grooves arranged at intervals along the axial direction of the tire, and the four longitudinal grooves divide the tread of the tire into five tread portions, and each tread portion is provided with a plurality of transverse grooves, each transverse groove has two transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and at least one transverse groove wall is provided with a first shallow groove 10 connected to the transverse groove wall on one side; each longitudinal groove has two longitudinal groove walls arranged opposite to each other along the axial direction of the tire, and at least one longitudinal groove wall is provided with a second shallow groove 11 connected to the longitudinal groove wall on one side; by arranging the transverse grooves, the contact area between the tire and the road surface can be increased, and the friction between the tire and the road surface can be increased. At the same time, the arrangement of the first shallow groove 10 and the second shallow groove 11 increases the envelope area of ​​the tire to water when passing through a wet and slippery road surface, avoids the tire from slipping, improves the handling of the tire, and makes the edges of the transverse grooves and the longitudinal grooves not too sharp, thereby reducing the damage to the edges of the transverse grooves and the longitudinal grooves caused by the tire contacting the road surface, thereby solving the problem of poor handling of the tire on wet and slippery roads in the prior art.

[0032] In this embodiment, the first shallow groove 10 has a first shallow groove wall and a second shallow groove wall arranged opposite to each other along the circumferential direction of the tire, the first shallow groove wall and the second shallow groove wall are connected to each other to form the groove bottom of the first shallow groove 10, and the first shallow groove wall and the transverse groove wall of the transverse groove closest to the first shallow groove 10 are arranged in a fit manner; the second shallow groove 11 has a third shallow groove wall and a fourth shallow groove wall arranged opposite to each other along the axial direction of the tire, the third shallow groove wall and the fourth shallow groove wall are connected to each other to form the groove bottom of the second shallow groove 11, and the third shallow groove wall and the longitudinal groove wall of the longitudinal groove closest to the second shallow groove 11 are arranged in a fit manner; wherein, the value range of the angle θ1 between the second shallow groove wall and the first shallow groove wall is 30°≤θ1≤45°, and the value range of the maximum angle θ2 between the fourth shallow groove wall and the third shallow groove wall is 30°≤θ2≤45°.

[0033] In this embodiment, the four longitudinal grooves are respectively the first longitudinal groove 1, the second longitudinal groove 2, the third longitudinal groove 3 and the fourth longitudinal groove 4, and the five tread portions are respectively the first tread portion 20, the second tread portion 30, the third tread portion 40, the fourth tread portion 50 and the fifth tread portion 60; wherein, the transverse grooves provided on the first tread portion 20 are the first transverse grooves 21, the transverse grooves provided on the second tread portion 30 are the second transverse grooves 31, the transverse grooves provided on the third tread portion 40 are the third transverse grooves 41, the transverse grooves provided on the fourth tread portion 50 are the fourth transverse grooves 51 and the fifth transverse grooves 52, and the transverse grooves provided on the fifth tread portion 60 are the sixth transverse grooves 61 and the seventh transverse grooves 62.

[0034] Specifically, the tire tread width is TAW, and the groove width of the first longitudinal groove 1, the groove width of the second longitudinal groove 2, the groove width of the third longitudinal groove 3 and the groove width of the fourth longitudinal groove 4 are 6.4%±0.3%TAW, 5.9%±0.3%TAW, 5.9%±0.3%TAW and 5.6%±0.3%TAW respectively. The sum of the groove width of the first longitudinal groove 1, the groove width of the second longitudinal groove 2, the groove width of the third longitudinal groove 3 and the groove width of the fourth longitudinal groove 4 is 23.8%TAW, which can improve the drainage performance on wet roads.

[0035] Specifically, the angles between the two longitudinal groove walls of the first longitudinal groove 1 and the normal line of the groove bottom of the first longitudinal groove 1 are 10° and 12° respectively, the angles between the two longitudinal groove walls of the fourth longitudinal groove 4 and the normal line of the groove bottom of the fourth longitudinal groove 4 are 10° and 12° respectively, the angles between the two longitudinal groove walls of the third longitudinal groove 3 and the normal line of the groove bottom of the third longitudinal groove 3 are both 8°, and the angles between the two longitudinal groove walls of the second longitudinal groove 2 and the normal line of the groove bottom of the second longitudinal groove 2 are both 8°; the groove depth of the second longitudinal groove 2 and the groove depth of the third longitudinal groove 3 are both 8.2mm, the groove depth of the first longitudinal groove 1 and the groove depth of the fourth longitudinal groove 4 are both 8mm. By increasing the groove depths of the first longitudinal groove 1, the second longitudinal groove 2, the third longitudinal groove 3 and the fourth longitudinal groove 4, the wear resistance of the tire can be improved.

[0036] Specifically, the first tread portion 20 and the fifth tread portion 60 have larger areas, while the second tread portion 30 , the third tread portion 40 , and the fourth tread portion 50 have smaller areas, which makes the tire more rigid and improves the handling of the tire.

[0037] Specifically, the projection of the connecting wall of the groove bottom and the longitudinal groove wall of the first longitudinal groove 1 on the normal plane of the groove bottom, the projection of the connecting wall of the groove bottom and the longitudinal groove wall of the second longitudinal groove 2 on the normal plane of the groove bottom, the projection of the connecting wall of the groove bottom and the longitudinal groove wall of the third longitudinal groove 3 on the normal plane of the groove bottom, and the projection of the connecting wall of the groove bottom and the longitudinal groove wall of the fourth longitudinal groove 4 on the normal plane of the groove bottom are all arcs with a radius of 2.5 mm.

[0038] In this embodiment, the first end of each first transverse groove 21 extends to connect with and pass through the first longitudinal groove 1, and the second end of each first transverse groove 21 extends to the shoulder of the tire. At least one first steel sheet 22 is provided between any two adjacent first transverse grooves 21. Each first transverse groove 21 has two first transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove 10 is provided on one side of each first transverse groove wall; wherein, the angle between the first transverse groove wall and the normal line of the groove bottom of the first transverse groove 21 is 15°, the second shallow groove wall of the first shallow groove 10 closest to the first transverse groove 21 is an arc-shaped surface, and the groove depth of the second end of the first transverse groove 21 is greater than the groove depth of the first end of the first transverse groove 21.

[0039] Specifically, the provision of the first steel sheet 22 can increase the tire's ability to cut through water film when driving on wet ground, improve the tire's wet-slip performance, shorten the vehicle's braking distance, and help improve the tire's snow traction ability; the design of more steel sheets is conducive to reducing the rigidity of the tread, reducing stress, and improving ride comfort; at the same time, the first steel sheet 22 is a 3D steel sheet with a thickness of 0.6 mm. While enhancing the creeping properties of the pattern blocks, it can also increase the rigidity of the pattern blocks and enhance the handling performance of the tire.

[0040] Specifically, the groove depth of the second end of the first transverse groove 21 is greater than the groove depth of the first end of the first transverse groove 21 , which can increase the rigidity of the first tread portion 20 and ensure the drainage performance of the tire while ensuring the handling performance of the tire.

[0041] In this embodiment, the two ends of each second transverse groove 31 extend to connect with and penetrate the first longitudinal groove 1 and the second longitudinal groove 2 respectively, and at least one second steel sheet 32 ​​is arranged between any two adjacent second transverse grooves 31. Each second transverse groove 31 has two second transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove 10 is arranged on one side of each second transverse groove wall; wherein, the angle between the second transverse groove wall and the groove bottom normal line of the second transverse groove 31 is 15°, the second shallow groove wall of the first shallow groove 10 closest to the second transverse groove 31 is an arc-shaped surface, and the groove depth at both ends of the second transverse groove 31 is less than the groove depth at the middle position of the second transverse groove 31.

[0042] Specifically, the provision of the second steel sheet 32 ​​can increase the tire's ability to cut through water film when driving on wet ground, improve the tire's wet-slip performance, shorten the vehicle's braking distance, and help improve the tire's snow traction ability; the design with more steel sheets is conducive to reducing the rigidity of the tread, reducing stress, and improving ride comfort; at the same time, the second steel sheet 32 ​​is a 3D steel sheet with a thickness of 0.6 mm. While enhancing the creeping performance of the pattern block, it can also increase the rigidity of the pattern block and enhance the handling performance of the tire.

[0043] Specifically, the groove depth at both ends of the second transverse groove 31 is smaller than the groove depth in the middle of the second transverse groove 31 , which can increase the rigidity of the second tread portion 30 and ensure the drainage performance of the tire while ensuring the handling performance of the tire.

[0044] In this embodiment, both ends of each third transverse groove 41 extend to connect with and penetrate the second longitudinal groove 2 and the third longitudinal groove 3 respectively, and at least one third steel sheet 42 is provided between any two adjacent third transverse grooves 41. Each third transverse groove 41 has two third transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove 10 is provided on one side of each third transverse groove wall; wherein, the angle between at least one third transverse groove wall and the groove bottom normal line of the third transverse groove 41 is 30°, and the second shallow groove wall of the first shallow groove 10 closest to the third transverse groove 41 is a plane.

[0045] Specifically, the provision of the third steel sheet 42 can increase the tire's ability to cut through water film when driving on wet ground, thereby improving the tire's wet-slip performance, shortening the vehicle's braking distance, and helping to improve the tire's snow traction capability; the design with more steel sheets is conducive to reducing the rigidity of the tread, reducing stress, and improving ride comfort; at the same time, the third steel sheet 42 is a 3D steel sheet with a thickness of 0.6 mm. While enhancing the creeping properties of the pattern blocks, it can also increase the rigidity of the pattern blocks and enhance the handling performance of the tire.

[0046] In this embodiment, both ends of each fourth transverse groove 51 extend to connect and penetrate the third longitudinal groove 3 and the fourth longitudinal groove 4, respectively. A fifth transverse groove 52 and a steel plate group are provided between any two adjacent fourth transverse grooves 51. One end of the fifth transverse groove 52 is connected and penetrates the third longitudinal groove 3, and the other end of the fifth transverse groove 52 is arranged toward the fourth longitudinal groove 4. Each fifth transverse groove 52 has two fifth transverse groove walls arranged opposite to each other in the circumferential direction of the tire, and one side of each fifth transverse groove wall is provided with a first shallow groove 10; wherein, at least one fifth transverse groove wall is connected to the fifth The angle between the normal lines of the bottom of the transverse groove 52 is 30°, and the second shallow groove wall of the first shallow groove 10 closest to the fifth transverse groove 52 is a plane; each fourth transverse groove 51 has two fourth transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove 10 is arranged on one side of each fourth transverse groove wall; wherein, the angle between the fourth transverse groove wall and the normal line of the bottom of the fourth transverse groove 51 is 15°, the fourth shallow groove wall of the first shallow groove 10 closest to the fourth transverse groove 51 is an arc-shaped surface, and the groove depth at both ends of the fourth transverse groove 51 is less than the groove depth in the middle position of the fourth transverse groove 51.

[0047] In this embodiment, the steel sheet group includes a first short steel sheet 551, a second short steel sheet 552, a third short steel sheet 553, a fourth short steel sheet 554, a fifth short steel sheet 555, a sixth short steel sheet 556 and a seventh short steel sheet 557. The first short steel sheet 551, the second short steel sheet 552 and the third short steel sheet 553 are spaced apart along the circumferential direction of the tire. The two ends of the second short steel sheet 552 are respectively connected to and penetrate the third longitudinal groove 3 and the fifth transverse groove 52. The two ends of the third short steel sheet 553 are respectively connected to and penetrate the third longitudinal groove 3 and the fourth transverse groove 51. 556 are arranged at intervals along the circumferential direction of the tire, the two ends of the sixth short steel sheet 556 are respectively connected to and penetrate the fourth longitudinal groove 4 and the fifth transverse groove 52, the two ends of the seventh short steel sheet 557 are respectively connected to the end of the fifth transverse groove 52 and another fourth transverse groove 51, the extension direction of the first short steel sheet 551, the extension direction of the second short steel sheet 552, the extension direction of the third short steel sheet 553, the extension direction of the fourth short steel sheet 554, the extension direction of the fifth short steel sheet 555 and the extension direction of the sixth short steel sheet 556 are arranged in parallel, and the extension direction of the seventh short steel sheet 557 may be arranged to intersect with the extension direction of the first short steel sheet 551.

[0048] Specifically, the setting of the steel plate group can increase the tire's ability to cut through the water film when driving on wet ground, improve the tire's wet performance, shorten the vehicle's braking distance, and help improve the tire's snow traction ability; the design with more steel plates is conducive to reducing the rigidity of the tread, reducing stress, and improving ride comfort; at the same time, each steel plate in the steel plate group is a 3D steel plate with a thickness of 0.6mm. While enhancing the creeping properties of the pattern blocks, it can also increase the rigidity of the pattern blocks and enhance the handling performance of the tire.

[0049] In this embodiment, the sixth transverse groove 61 and the seventh transverse groove 62 are alternately arranged along the circumferential direction of the tire, the first end of the sixth transverse groove 61 and the first end of the seventh transverse groove 62 both extend to the shoulder of the tire, the second end of the sixth transverse groove 61 is closed, and the second end of the seventh transverse groove 62 extends to connect with and penetrate the fourth longitudinal groove 4, and a fourth steel sheet 63 and a fifth longitudinal groove 64 are provided between any adjacent sixth transverse groove 61 and seventh transverse groove 62, one end of the fourth steel sheet 63 is arranged toward the shoulder of the tire, the other end of the fourth steel sheet 63 is connected to and penetrates the fourth longitudinal groove 4, and the two ends of the fifth longitudinal groove 64 are respectively connected to and penetrate the sixth transverse groove 61 and the seventh transverse groove 62; wherein, the extension direction of the fourth steel sheet 63, the extension direction of the sixth transverse groove 61 and the extension direction of the seventh transverse groove 62 are arranged in parallel, and the extension direction of the fifth longitudinal groove 64 and the extension direction of the fourth steel sheet 63 may be arranged to intersect.

[0050] Specifically, the provision of the fourth steel sheet 63 can increase the tire's ability to cut through water film when driving on wet ground, thereby improving the tire's wet-slip performance, shortening the vehicle's braking distance, and helping to improve the tire's snow traction capability. The design with more steel sheets is conducive to reducing the rigidity of the tread, reducing stress, and improving ride comfort. At the same time, the fourth steel sheet 63 is a 3D steel sheet with a thickness of 0.6 mm. While enhancing the creeping properties of the tread blocks, it can also increase the rigidity of the tread blocks and enhance the handling performance of the tire.

[0051] Specifically, the groove depth of the second end of the seventh transverse groove 62 is less than the groove depth of the first end of the seventh transverse groove 62, which can increase the rigidity of the fifth tread portion 60, ensuring the drainage performance of the tire while ensuring the handling performance of the tire; the second end of the sixth transverse groove 61 is closed, which can increase the rigidity of the fifth tread portion 60.

[0052] Specifically, each seventh transverse groove 62 has two seventh transverse groove 62 walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove 10 is provided on one side of each seventh transverse groove 62 wall; wherein, the angle between the seventh transverse groove 62 wall and the groove bottom normal line of the seventh transverse groove 62 is 15°, and the second shallow groove wall of the first shallow groove 10 closest to the seventh transverse groove 62 is an arc-shaped surface.

[0053] Specifically, each sixth transverse groove 61 has two sixth transverse groove 61 walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove 10 is provided on one side of each sixth transverse groove 61 wall; wherein, the angle between the sixth transverse groove 61 wall and the groove bottom normal line of the sixth transverse groove 61 is 30°, and the second shallow groove wall of the first shallow groove 10 closest to the sixth transverse groove 61 is a plane.

[0054] In this embodiment, each tread portion includes a plurality of tread sub-portions sequentially arranged along the circumferential direction of the tire, and the length of each tread sub-portion along the circumferential direction of the tire is a preset pitch. The preset pitch of each tread sub-portion is any one of five different pitch lengths, and the five pitch lengths are respectively a first pitch length P1, a second pitch length P2, a third pitch length P3, a fourth pitch length P4 and a fifth pitch length P5. Among the plurality of tread sub-portions, at least one tread sub-portion has a pitch length of the first pitch length P1, a second pitch length P2, a third pitch length P3, a fourth pitch length P4 and a fifth pitch length P5. The pitch length of at least one tread sub-portion is a second pitch length P1, the pitch length of at least one tread sub-portion is a second pitch length P2, the pitch length of at least one tread sub-portion is a third pitch length p3, the pitch length of at least one tread sub-portion is a fourth pitch length p4, and the pitch length of at least one tread sub-portion is a fifth pitch length p5; wherein, P1:P2:P3:P4:P5=1:1.101±0.03:1.213±0.03:1.333±0.03:1.469±0.03.

[0055] Specifically, such a setting can make the overall pattern of the tire more detailed and meticulous, and the deformation and creep of the pattern blocks on the tread are more uniform when the tire touches the ground, which can effectively improve the braking performance of the tire. At the same time, more preset pitches can disperse and reduce the impact of the road on the tire, improve ride comfort, and reduce the noise of the tire when driving.

[0056] Specifically, when the preset pitch of the tread sub-portion is less than 25 mm, and the number of the first steel sheet 22, the second steel sheet 32, the third steel sheet 42 and the fourth steel sheet 63 is 1, the first steel sheet 22, the second steel sheet 32, the third steel sheet 42 and the fourth steel sheet 63 are all located in the middle position of the tread portion; when the preset pitch of the tread sub-portion is greater than 25 mm, and the number of the first steel sheet 22, the second steel sheet 32, the third steel sheet 42 and the fourth steel sheet 63 are all 2, the first steel sheet 22, the second steel sheet 32, the third steel sheet 42 and the fourth steel sheet 63 are all located in the third equal part of the tread portion, so that the tread sub-portion division is more regular and uniform, and the stress distribution is balanced.

[0057] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0058] The tire of the present invention has four longitudinal grooves arranged at intervals along the axial direction of the tire, and the four longitudinal grooves divide the tread of the tire into five tread portions, and each tread portion is provided with a plurality of transverse grooves, each transverse groove has two transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and at least one transverse groove wall is provided with a first shallow groove 10 connected to the transverse groove wall on one side; each longitudinal groove has two longitudinal groove walls arranged opposite to each other along the axial direction of the tire, and at least one longitudinal groove wall is provided with a second shallow groove 11 connected to the longitudinal groove wall on one side; by arranging the transverse grooves, the contact area between the tire and the road surface can be increased, and the friction between the tire and the road surface can be increased. At the same time, the arrangement of the first shallow groove 10 and the second shallow groove 11 increases the envelope area of ​​the tire to water when passing through a wet and slippery road surface, avoids the tire from slipping, improves the handling of the tire, and makes the edges of the transverse grooves and the longitudinal grooves not too sharp, thereby reducing the damage to the edges of the transverse grooves and the longitudinal grooves caused by the tire contacting the road surface, thereby solving the problem of poor handling of the tire on wet and slippery roads in the prior art.

[0059] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0060] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0061] 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, characterized in that: The tire comprises: Four longitudinal grooves are arranged at intervals along the axial direction of the tire, each of the longitudinal grooves extends along the circumferential direction of the tire, and the four longitudinal grooves divide the tread of the tire into five tread portions, each of the tread portions is provided with a plurality of transverse grooves; Each of the transverse grooves has two transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and a first shallow groove (10) connected to the transverse groove wall is provided on one side of at least one of the transverse groove walls, and the extension direction of the first shallow groove (10) is the same as the extension direction of the transverse groove wall; each of the longitudinal grooves has two longitudinal groove walls arranged opposite to each other along the axial direction of the tire, and a second shallow groove (11) connected to the longitudinal groove wall is provided on one side of at least one of the longitudinal groove walls, and the extension direction of the second shallow groove (11) is the same as the extension direction of the longitudinal groove wall.

2. The tire according to claim 1, wherein The first shallow groove (10) has a first shallow groove wall and a second shallow groove wall arranged opposite to each other along the circumferential direction of the tire, the first shallow groove wall and the second shallow groove wall are connected to each other to form a groove bottom of the first shallow groove (10), and the first shallow groove wall is arranged in close contact with the transverse groove wall of the transverse groove closest to the first shallow groove (10); The second shallow groove (11) has a third shallow groove wall and a fourth shallow groove wall arranged opposite to each other in the axial direction of the tire, the third shallow groove wall and the fourth shallow groove wall are connected to each other to form the groove bottom of the second shallow groove (11), and the third shallow groove wall is arranged in close contact with the longitudinal groove wall of the longitudinal groove closest to the second shallow groove (11); The angle θ1 between the second shallow groove wall and the first shallow groove wall has a value range of 30°≤θ1≤45°, and the maximum angle θ2 between the fourth shallow groove wall and the third shallow groove wall has a value range of 30°≤θ2≤45°.

3. The tire according to claim 1, wherein: The four longitudinal grooves are respectively a first longitudinal groove (1), a second longitudinal groove (2), a third longitudinal groove (3) and a fourth longitudinal groove (4); the five tread portions are respectively a first tread portion (20), a second tread portion (30), a third tread portion (40), a fourth tread portion (50) and a fifth tread portion (60); The transverse grooves provided on the first tread portion (20) are first transverse grooves (21), the transverse grooves provided on the second tread portion (30) are second transverse grooves (31), the transverse grooves provided on the third tread portion (40) are third transverse grooves (41), the transverse grooves provided on the fourth tread portion (50) are fourth transverse grooves (51) and fifth transverse grooves (52), and the transverse grooves provided on the fifth tread portion (60) are sixth transverse grooves (61) and seventh transverse grooves (62).

4. The tire according to claim 3, characterized in that The first end of each first transverse groove (21) extends to connect with and pass through the first longitudinal groove (1), the second end of each first transverse groove (21) extends to the shoulder of the tire, at least one first steel sheet (22) is provided between any two adjacent first transverse grooves (21), each first transverse groove (21) has two first transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and the first shallow groove (10) is provided on one side of each first transverse groove wall; The angle between the first transverse groove wall and the normal line of the groove bottom of the first transverse groove (21) is 15°, the second shallow groove wall of the first shallow groove (10) closest to the first transverse groove (21) is an arc-shaped surface, and the groove depth of the second end of the first transverse groove (21) is greater than the groove depth of the first end of the first transverse groove (21).

5. The tire according to claim 3, characterized in that Both ends of each second transverse groove (31) extend to connect with and penetrate the first longitudinal groove (1) and the second longitudinal groove (2), at least one second steel sheet (32) is provided between any two adjacent second transverse grooves (31), each second transverse groove (31) has two second transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and one side of each second transverse groove wall is provided with the first shallow groove (10); The angle between the second transverse groove wall and the groove bottom normal line of the second transverse groove (31) is 15°, the second shallow groove wall of the first shallow groove (10) closest to the second transverse groove (31) is an arc-shaped surface, and the groove depth at both ends of the second transverse groove (31) is smaller than the groove depth at the middle position of the second transverse groove (31).

6. The tire according to claim 3, characterized in that Both ends of each of the third transverse grooves (41) extend to connect with and penetrate the second longitudinal groove (2) and the third longitudinal groove (3), at least one third steel sheet (42) is provided between any two adjacent third transverse grooves (41), each of the third transverse grooves (41) has two third transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and one side of each of the third transverse groove walls is provided with the first shallow groove (10); The angle between at least one of the third transverse groove walls and the groove bottom normal line of the third transverse groove (41) is 30°, and the second shallow groove wall of the first shallow groove (10) closest to the third transverse groove (41) is a plane.

7. The tire according to claim 3, characterized in that Both ends of each of the fourth transverse grooves (51) extend to connect with and penetrate the third longitudinal groove (3) and the fourth longitudinal groove (4), respectively; a fifth transverse groove (52) and a steel plate group are provided between any two adjacent fourth transverse grooves (51); one end of the fifth transverse groove (52) is connected with and penetrates the third longitudinal groove (3), and the other end of the fifth transverse groove (52) is arranged toward the fourth longitudinal groove (4); each of the fifth transverse grooves (52) has two fifth transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and one side of each of the fifth transverse groove walls is provided with the first shallow groove (10); wherein the angle between at least one of the fifth transverse groove walls and the groove bottom normal line of the fifth transverse groove (52) is 30°, and the second shallow groove wall of the first shallow groove (10) closest to the fifth transverse groove (52) is a plane; each of the fourth transverse grooves (51) has two fourth transverse groove walls arranged opposite to each other along the circumferential direction of the tire, and the first shallow groove (10) is arranged on one side of each of the fourth transverse groove walls; wherein the angle between the fourth transverse groove wall and the groove bottom normal line of the fourth transverse groove (51) is 15°, and the fourth shallow groove wall of the first shallow groove (10) closest to the fourth transverse groove (51) is an arc-shaped surface, and the groove depth at both ends of the fourth transverse groove (51) is less than the groove depth at the middle position of the fourth transverse groove (51).

8. The tire according to claim 7, characterized in that The steel sheet group includes a first short steel sheet (551), a second short steel sheet (552), a third short steel sheet (553), a fourth short steel sheet (554), a fifth short steel sheet (555), a sixth short steel sheet (556) and a seventh short steel sheet (557); the first short steel sheet (551), the second short steel sheet (552) and the third short steel sheet (553) are arranged at intervals along the circumferential direction of the tire; two ends of the second short steel sheet (552) are respectively connected to and penetrate the third longitudinal groove (3) and the fifth transverse groove (52); two ends of the third short steel sheet (553) are respectively connected to and penetrate the third longitudinal groove (3) and one of the fourth transverse grooves (51); The fourth short steel sheet (554), the fifth short steel sheet (555) and the sixth short steel sheet (556) are arranged at intervals along the circumferential direction of the tire, the two ends of the sixth short steel sheet (556) are respectively connected to and penetrate the fourth longitudinal groove (4) and the fifth transverse groove (52), the two ends of the seventh short steel sheet (557) are respectively connected to the end of the fifth transverse groove (52) and another fourth transverse groove (51), the extension direction of the first short steel sheet (551), the extension direction of the second short steel sheet (552), the extension direction of the third short steel sheet (553), the extension direction of the fourth short steel sheet (554), the extension direction of the fifth short steel sheet (555) and the extension direction of the sixth short steel sheet (556) are arranged in parallel, and the extension direction of the seventh short steel sheet (557) and the extension direction of the first short steel sheet (551) can be arranged to intersect.

9. The tire according to claim 3, characterized in that The sixth transverse groove (61) and the seventh transverse groove (62) are alternately arranged along the circumferential direction of the tire, the first end of the sixth transverse groove (61) and the first end of the seventh transverse groove (62) both extend to the shoulder of the tire, the second end of the sixth transverse groove (61) is closed, the second end of the seventh transverse groove (62) extends to connect with and penetrate the fourth longitudinal groove (4), and a fourth steel sheet (63) and a fifth longitudinal groove (64) are arranged between any adjacent sixth transverse groove (61) and the seventh transverse groove (62), one end of the fourth steel sheet (63) is arranged toward the shoulder of the tire, the other end of the fourth steel sheet (63) is connected to and penetrates the fourth longitudinal groove (4), and both ends of the fifth longitudinal groove (64) are connected to and penetrate the sixth transverse groove (61) and the seventh transverse groove (62) respectively; The extension direction of the fourth steel sheet (63), the extension direction of the sixth transverse groove (61) and the extension direction of the seventh transverse groove (62) are arranged in parallel, and the extension direction of the fifth longitudinal groove (64) and the extension direction of the fourth steel sheet (63) can be arranged to intersect.

10. The tire according to claim 1, wherein Each of the tread portions includes a plurality of tread sub-portions sequentially arranged along the circumferential direction of the tire, the length of each of the tread sub-portions along the circumferential direction of the tire being a preset pitch, the preset pitch of each of the tread sub-portions being any one of five different pitch lengths, the five pitch lengths being a first pitch length P1, a second pitch length P2, a third pitch length P3, a fourth pitch length P4 and a fifth pitch length P5, and among the plurality of tread sub-portions, at least one of the tread sub-portions has a pitch length of the first pitch length P1, a second pitch length P2, a third pitch length P3, a fourth pitch length P4 and a fifth pitch length P5. The pitch length of at least one tread sub-portion is a second pitch length P1, the pitch length of at least one tread sub-portion is a third pitch length p3, the pitch length of at least one tread sub-portion is a fourth pitch length p4, and the pitch length of at least one tread sub-portion is a fifth pitch length p5; wherein, P1:P2:P3:P4:P5=1:1.101±0.03:1.213±0.03:1.333±0.03:1.469±0.03.

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