Tire

Abstract

The invention provides a tire, the tread of the tire is provided with a preset pattern, the preset pattern comprises a plurality of resistance reducing grooves, the plurality of resistance reducing grooves are sequentially arranged along the circumferential direction of the tire, each resistance reducing groove comprises a first broken line groove and a second broken line groove, and the first broken line groove and the second broken line groove are arranged in a crossed manner; the first end of the first broken line groove of each resistance reducing groove is communicated with the first end of the second broken line groove of each resistance reducing groove, each first broken line groove is provided with a plurality of first groove sections, each second broken line groove is provided with a plurality of second groove sections, the extension directions of any two first groove sections are arranged in an intersecting manner, and the extension directions of any two second groove sections are arranged in an intersecting manner; a first communicating groove is formed between any two adjacent resistance reducing grooves, the two ends of the first communicating groove communicate with the two resistance reducing grooves correspondingly, and the tire solves the problem that in the prior art, a tire used on mixed road conditions is difficult to have good wet skid resistance and low rolling resistance at the same time.

Description

Technical Field

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

[0002] More and more countries have placed special emphasis on the importance of reducing fuel consumption and exhaust emissions. Reducing tire rolling resistance is the main way to achieve energy conservation and emission reduction. At the same time, in view of the objective natural environment of the target market, it is also very necessary to enhance the wet grip and driving ability of tires on slippery roads. Finally, considering the complexity of road conditions and driving comfort, high technical requirements are also placed on tire wear resistance and noise.

[0003] However, there is a lack of tires on the market that can meet the requirements of mixed road conditions, with good anti-skid performance, high wear resistance and low noise, while also taking low rolling resistance into account. Summary of the invention

[0004] The main purpose of the present invention is to provide a tire to solve the problem in the prior art that tires used in mixed road conditions are difficult to have both good anti-skid performance and low rolling resistance.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a tire, wherein the tread of the tire has a tread centerline, the tread centerline extends along the circumferential direction of the tire, and a preset pattern is arranged on the tread of the tire, the preset pattern includes: a plurality of drag reducing grooves, the plurality of drag reducing grooves are arranged in sequence along the circumferential direction of the tire, each drag reducing groove includes a first fold line groove and a second fold line groove arranged crosswise, the first end of the first fold line groove of each drag reducing groove and the first end of the second fold line groove are connected, the second end of the first fold line groove and the second end of the second fold line groove of each drag reducing groove both extend to the shoulder of the tire, the first fold line groove has a plurality of first groove segments, the second fold line groove has a plurality of second groove segments, the extension directions of any two first groove segments can be arranged to intersect, and the extension directions of any two second groove segments can be arranged to intersect; a first connecting groove is arranged between any two adjacent drag reducing grooves, and the two ends of the first connecting groove are respectively connected to the two drag reducing grooves.

[0006] Furthermore, the drag reduction grooves are in a herringbone shape, and a second connecting groove and a third connecting groove are also arranged between any two adjacent drag reduction grooves, the two ends of the second connecting groove are respectively connected to the two drag reduction grooves, and the two ends of the third connecting groove are respectively connected to the two drag reduction grooves, the first connecting groove, the second connecting groove and the third connecting groove are arranged at intervals along the axial direction of the tire, and the groove width of the first connecting groove, the groove width of the second connecting groove and the groove width of the third connecting groove gradually increase, and the groove depth of the first connecting groove, the groove depth of the second connecting groove and the groove depth of the third connecting groove gradually increase.

[0007] Furthermore, a fourth connecting groove is arranged between the third connecting groove and the second connecting groove located between two adjacent resistance reduction grooves, and both ends of the fourth connecting groove are respectively connected to the third connecting groove and the second connecting groove. The fourth connecting groove includes three groove sections connected in sequence, and the extension directions of the three groove sections can be arranged to intersect.

[0008] Furthermore, the groove width of the fourth connecting groove is greater than the groove width of the first connecting groove, and smaller than the groove width of the second connecting groove; the groove depth of the fourth connecting groove is greater than the groove depth of the first connecting groove, and smaller than the groove depth of the second connecting groove.

[0009] Furthermore, from the shoulder of the tire to the center line of the tread, the groove width of the first fold line groove gradually decreases, and the groove width of the second fold line groove gradually decreases. The value range of the groove width d1 of the first fold line groove is 14.5mm≤d1≤20mm, and the value range of the groove width d2 of the second fold line groove is 14.5mm≤d2≤20mm.

[0010] Furthermore, along the groove width direction of the first fold line groove, the first fold line groove has a first groove wall and a second groove wall arranged opposite to each other, the first groove wall is extended along the first preset fold line segment, the first preset fold line segment includes a first straight line segment, a second straight line segment, a third straight line segment and a fourth straight line segment connected in sequence, the fourth straight line segment is arranged close to the tread center line relative to the first straight line segment, the angle between the first straight line segment and the axis of the tire is θ1, the angle between the second straight line segment and the axis of the tire is θ2, the angle between the third straight line segment and the axis of the tire is θ3, and the angle between the fourth straight line segment and the axis of the tire is θ4; wherein, θ1<θ2<θ4<θ3.

[0011] Further, the second groove wall is extended along a second preset fold line segment, the second preset fold line segment includes a fifth straight line segment, a sixth straight line segment, a seventh straight line segment and an eighth straight line segment connected in sequence, the eighth straight line segment is arranged close to the tread center line relative to the fifth straight line segment, the angle between the fifth straight line segment and the axis of the tire is θ5, the angle between the sixth straight line segment and the axis of the tire is θ6, the angle between the seventh straight line segment and the axis of the tire is θ7, and the angle between the eighth straight line segment and the axis of the tire is θ8; wherein, θ5<θ6<θ8<θ7.

[0012] Furthermore, the angle between the first groove wall and the mid-vertical plane of the groove bottom of the first fold line groove is a first preset angle β1, and the angle between the second groove wall and the mid-vertical plane of the groove bottom of the first fold line groove is a second preset angle β2, β1>β2.

[0013] Furthermore, a first reinforcing rib is provided in a groove section of the first fold line groove of each drag reducing groove close to the tread centerline, and a second reinforcing rib is provided in a groove section of the first fold line groove of each drag reducing groove close to the tire shoulder.

[0014] Furthermore, the treads include a plurality of tread portions arranged in sequence along the circumferential direction of the tire, the length of each tread portion along the circumference of the tire being a preset pitch, the preset pitch of each tread portion being any one of three different pitch lengths, the three pitch lengths being respectively a first pitch length, a second pitch length and a third pitch length; among the plurality of tread portions, at least one tread portion has a pitch length of the first pitch length, at least one tread portion has a pitch length of the second pitch length, and at least one tread portion has a pitch length of the third pitch length; wherein the ratio of the first pitch length, the second pitch length and the third pitch length is: 1.095:1:0.933.

[0015] By applying the technical solution of the present invention, a preset pattern is arranged on the tread of the tire, and the preset pattern includes: a plurality of drag reducing grooves, the plurality of drag reducing grooves are arranged in sequence along the circumferential direction of the tire, each drag reducing groove includes a first fold line groove and a second fold line groove arranged crosswise, the first end of the first fold line groove of each drag reducing groove is connected to the first end of the second fold line groove, the second end of the first fold line groove of each drag reducing groove and the second end of the second fold line groove both extend to the shoulder of the tire, the extension directions of any two first groove sections can be arranged to intersect, the extension directions of any two second groove sections can be arranged to intersect, and the drag reducing The provision of the grooves not only reduces the rolling resistance of the tire, but also improves the drainage, mud discharge and other performances of the tire, thereby ensuring the self-cleaning and wear resistance of the tire; a first connecting groove is provided between any two adjacent resistance-reducing grooves, and both ends of the first connecting groove are respectively connected to the two resistance-reducing grooves. The provision of the first connecting groove can improve the wet grip ability of the tire, so that the tire of the present invention has both good anti-wet skid performance and low rolling resistance, thereby solving the problem in the prior art that tires used in mixed road conditions are difficult to have both good anti-wet skid performance and low rolling resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

[0018] Figure 2 Shows Figure 1 Schematic cross-sectional view of the first fold line groove at AA shown in FIG.

[0019] The above drawings include the following reference numerals:

[0020] 1. First fold line groove; 2. Second fold line groove; 5. First connecting groove; 3. Second connecting groove; 4. Third connecting groove; 6. Fourth connecting groove; 11. First groove wall; 12. Second groove wall; 13. First straight line segment; 14. Second straight line segment; 15. Third straight line segment; 151. Fourth straight line segment; 16. Fifth straight line segment; 17. Sixth straight line segment; 18. Seventh straight line segment; 19. Eighth straight line segment; 7. First reinforcing rib; 8. Second reinforcing rib; 9. Shoulder pattern block; 10. Secondary edge pattern block; 101. Middle pattern block. DETAILED DESCRIPTION

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps 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 accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0023] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present 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, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0024] Please refer to Figure 1 and Figure 2The present invention provides a tire, wherein the tread of the tire has a tread center line, the tread center line extends along the circumferential direction of the tire, and a preset pattern is arranged on the tread of the tire, the preset pattern includes: a plurality of drag reducing grooves, the plurality of drag reducing grooves are arranged in sequence along the circumferential direction of the tire, each drag reducing groove includes a first fold line groove 1 and a second fold line groove 2 which are arranged crosswise, the first end of the first fold line groove 1 of each drag reducing groove is connected to the first end of the second fold line groove 2, the second end of the first fold line groove 1 and the second end of the second fold line groove 2 of each drag reducing groove extends to the shoulder of the tire, the first fold line groove 1 has a plurality of first groove segments, the second fold line groove 2 has a plurality of second groove segments, the extension directions of any two first groove segments can be arranged to intersect, and the extension directions of any two second groove segments can be arranged to intersect; a first connecting groove 5 is arranged between any two adjacent drag reducing grooves, and the two ends of the first connecting groove 5 are respectively connected to the two drag reducing grooves.

[0025] The tread of the tire of the present invention is provided with a preset pattern, and the preset pattern includes: a plurality of drag reducing grooves, the plurality of drag reducing grooves are sequentially arranged along the circumferential direction of the tire, each drag reducing groove includes a first fold line groove 1 and a second fold line groove 2 arranged crosswise, the first end of the first fold line groove 1 of each drag reducing groove is connected to the first end of the second fold line groove 2, the second end of the first fold line groove 1 of each drag reducing groove and the second end of the second fold line groove 2 extend to the shoulder of the tire, the extension directions of any two first groove sections can be arranged to intersect, the extension directions of any two second groove sections can be arranged to intersect, and the drag reducing grooves The setting not only reduces the rolling resistance of the tire, but also improves the drainage, mud discharge and other performances of the tire, ensuring the self-cleaning and wear resistance of the tire; a first connecting groove 5 is provided between any two adjacent resistance reducing grooves, and the two ends of the first connecting groove 5 are respectively connected to the two resistance reducing grooves. The setting of the first connecting groove 5 can improve the wet grip ability of the tire, so that the tire of the present invention has both good anti-wet skid performance and low rolling resistance, thereby solving the problem in the prior art that it is difficult for tires used in mixed road conditions to have both good anti-wet skid performance and low rolling resistance.

[0026] Specifically, from the shoulder of the tire to the center line of the tread, the tread of the tire has a shoulder pattern block 9, a secondary edge pattern block 10 and an intermediate pattern block 101 arranged in sequence. On the shoulder pattern block 9, the secondary edge pattern block 10 and the intermediate pattern block 101, the angles between the extension directions of the first fold line groove 1 and the second fold line groove 2 and the axial direction of the tire are all different. Such an arrangement can improve the rigidity of the intermediate pattern block 101 and reduce the rolling resistance of the tire.

[0027] In this embodiment, the drag reduction grooves are in a herringbone shape, and a second connecting groove 3 and a third connecting groove 4 are further arranged between any two adjacent drag reduction grooves, the two ends of the second connecting groove 3 are respectively connected to the two drag reduction grooves, and the two ends of the third connecting groove 4 are respectively connected to the two drag reduction grooves, the first connecting groove 5, the second connecting groove 3 and the third connecting groove 4 are arranged at intervals along the axial direction of the tire, and the groove width of the first connecting groove 5, the groove width of the second connecting groove 3 and the groove width of the third connecting groove 4 gradually increase, and the groove depth of the first connecting groove 5, the groove depth of the second connecting groove 3 and the groove depth of the third connecting groove 4 gradually increase.

[0028] Specifically, connecting the first fold line groove 1 and the second fold line groove 2 through the first connecting groove 5, the second connecting groove 3 and the third connecting groove 4 helps the tire to break the water film, improves the wet grip of the tire, and also allows the deformation of each tread block of the tire to be more uniform, thereby enhancing the ride comfort of the tire.

[0029] Specifically, the value ranges of the groove width k1 of the first connecting groove 5, the groove width k2 of the second connecting groove 3 and the groove width k3 of the third connecting groove 4 are respectively: 3mm≤k1≤8mm, 3mm≤k2≤8mm, 3mm≤k3≤8mm; the value ranges of the groove depth s1 of the first connecting groove 5, the groove depth s2 of the second connecting groove 3 and the groove depth s3 of the third connecting groove 4 are respectively: 6mm≤s1≤15mm, 6mm≤s2≤15mm, 6mm≤s3≤15mm.

[0030] In this embodiment, a fourth connecting groove 6 is arranged between the third connecting groove 4 and the second connecting groove 3 located between two adjacent resistance reduction grooves. Both ends of the fourth connecting groove 6 are respectively connected to the third connecting groove 4 and the second connecting groove 3. The fourth connecting groove 6 includes three groove sections connected in sequence, and the extension directions of the three groove sections can be arranged to intersect.

[0031] Specifically, the provision of the fourth connecting groove 6 not only further improves the drainage performance of the tire, but also enhances the overall aesthetic effect of the tire.

[0032] In this embodiment, the groove width of the fourth connecting groove 6 is greater than the groove width of the first connecting groove 5 and less than the groove width of the second connecting groove 3; the groove depth of the fourth connecting groove 6 is greater than the groove depth of the first connecting groove 5 and less than the groove depth of the second connecting groove 3.

[0033] Specifically, such a configuration not only further improves the drainage performance of the tire, but also enhances the overall aesthetic effect of the tire.

[0034] In this embodiment, from the shoulder of the tire to the center line of the tread, the groove width of the first fold line groove 1 gradually decreases, and the groove width of the second fold line groove 2 gradually decreases. The value range of the groove width d1 of the first fold line groove 1 is 14.5mm≤d1≤20mm, and the value range of the groove width d2 of the second fold line groove 2 is 14.5mm≤d2≤20mm.

[0035] Specifically, such a setting can ensure the self-cleaning and drivability of the tire in various application scenarios. Under the premise of ensuring straight and stable driving, compared with non-directional and common style grooves, the tire has low rolling resistance and good self-cleaning properties, while ensuring the driving performance of the tire.

[0036] In this embodiment, along the groove width direction of the first fold line groove 1, the first fold line groove 1 has a first groove wall 11 and a second groove wall 12 which are arranged opposite to each other, and the first groove wall 11 is extended along the first preset fold line segment, and the first preset fold line segment includes a first straight line segment 13, a second straight line segment 14, a third straight line segment 15 and a fourth straight line segment 151 which are connected in sequence, and the fourth straight line segment 151 is arranged close to the tread center line relative to the first straight line segment 13, and the angle between the first straight line segment 13 and the axis of the tire is θ1, the angle between the second straight line segment 14 and the axis of the tire is θ2, the angle between the third straight line segment 15 and the axis of the tire is θ3, and the angle between the fourth straight line segment 151 and the axis of the tire is θ4, wherein θ1<θ2<θ4<θ3.

[0037] In this embodiment, the second groove wall 12 is extended along the second preset fold line segment, and the second preset fold line segment includes a fifth straight line segment 16, a sixth straight line segment 17, a seventh straight line segment 18 and an eighth straight line segment 19 which are connected in sequence. The eighth straight line segment 19 is arranged close to the tread center line relative to the fifth straight line segment 16. The angle between the fifth straight line segment 16 and the axis of the tire is θ5, the angle between the sixth straight line segment 17 and the axis of the tire is θ6, the angle between the seventh straight line segment 18 and the axis of the tire is θ7, and the angle between the eighth straight line segment 19 and the axis of the tire is θ8; wherein, θ5<θ6<θ8<θ7.

[0038] Specifically, 14°≤θ1≤42°, 14°≤θ2≤42°, 14°≤θ3≤42°, and 14°≤θ4≤42°.

[0039] Specifically, 14°≤θ5≤42°, 14°≤θ6≤42°, 14°≤θ7≤42°, and 14°≤θ8≤42°.

[0040] Specifically, such a setting can ensure the self-cleaning and drivability of the tire in various application scenarios. Under the premise of ensuring straight and stable driving, compared with non-directional and common style grooves, the tire has low rolling resistance and good self-cleaning properties, while ensuring the driving performance of the tire.

[0041] Specifically, the preset pattern on the left side of the tread centerline is first centrally symmetrical to form the right side pattern, and then the right side pattern moves a certain distance along the circumferential direction of the tire to finally form the preset pattern on the right side, so the first fold line groove 1 and the second fold line groove 2 have the same structure.

[0042] In this embodiment, the angle between the first groove wall 11 and the mid-vertical plane of the groove bottom of the first fold line groove 1 is a first preset angle β1, and the angle between the second groove wall 12 and the mid-vertical plane of the groove bottom of the first fold line groove 1 is a second preset angle β2, β1>β2.

[0043] Specifically, such an arrangement makes the groove wall angle of the drag-reducing groove an asymmetric design, which helps to improve the driving performance of the tire.

[0044] In this embodiment, a first reinforcing rib 7 is provided in the groove section of the first fold line groove 1 of each drag reducing groove close to the tread centerline, and a second reinforcing rib 8 is provided in the groove section of the first fold line groove 1 of each drag reducing groove close to the shoulder.

[0045] Specifically, the first reinforcing rib 7 connects the middle pattern block 101 as a whole, thereby improving the rigidity of the middle pattern block 101; the shoulder is a large open shoulder and is provided with a second reinforcing rib 8, which can effectively connect the various pattern blocks while reducing the heat generated in the shoulder of the tire, thereby improving the integrity of the shoulder pattern block 9 and reducing the heat generated by the tread deformation during tire driving, especially during turning. The combination of the two reduces the rolling resistance of the tire and achieves energy conservation and emission reduction.

[0046] In this embodiment, the tread includes a plurality of tread portions arranged in sequence along the circumferential direction of the tire, the length of each tread portion along the circumference of the tire being a preset pitch, the preset pitch of each tread portion being any one of three different pitch lengths, the three pitch lengths being respectively a first pitch length, a second pitch length and a third pitch length; among the plurality of tread portions, at least one tread portion has a pitch length of the first pitch length, at least one tread portion has a pitch length of the second pitch length, and at least one tread portion has a pitch length of the third pitch length; wherein the ratio of the first pitch length, the second pitch length and the third pitch length is: 1.095:1:0.933.

[0047] Specifically, Figure 1 As shown, the first pitch length, the second pitch length and the third pitch length are L, M and S respectively, and the first pitch length, the second pitch length and the third pitch length are arranged irregularly along the circumference of the tire, which can better disperse the sound wave energy and reduce the noise peak, so that the tire of the present application has lower noise; wherein the quantity ratio is 12:21:11.

[0048] Specifically, the sea-to-land ratio of the preset pattern is 78%. In mixed road conditions, the overall sea-to-road ratio is at a higher ratio, so the overall rigidity of the tire is greater, which can effectively reduce rolling resistance. At the same time, the sea-to-land ratio in the center of the tread is higher, which increases the handling stability of the tire, and the sea-to-land ratio at the shoulder is smaller, which enhances the drainage, self-cleaning and driving capabilities of the tire.

[0049] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0050] The present invention adopts a directional pattern combined with a drag-reducing groove design, and a first connecting groove 5, a second connecting groove 3, a third connecting groove 4 and a fourth connecting groove 6 are arranged on the tread to improve the rigidity of the middle pattern block 101. At the same time, the overall pattern block is integrated and the groove depths of the first connecting groove 5, the second connecting groove 3, the third connecting groove 4 and the fourth connecting groove 6 are different, which can reduce the creep deformation of the tire during use, effectively ensure the tear resistance of the tire pattern and reduce the rolling resistance of the tire; at the same time, the arrangement of the first connecting groove 5, the second connecting groove 3, the third connecting groove 4 and the fourth connecting groove 6 can also increase the wet grip performance of the tire; on the shoulder pattern block 9, the secondary edge pattern block 10 and the middle pattern block 101, the angles between the extension directions of the first fold line groove 1 and the second fold line groove 2 and the axial direction of the tire are different, and the groove widths of the first fold line groove 1 and the second fold line groove 2 are different, which ensures the driving performance and self-cleaning performance of the tire; the tire noise can be reduced by arranging the first pitch length, the second pitch length and the third pitch length irregularly along the circumference of the tire.

[0051] The tread of the tire of the present invention is provided with a preset pattern, and the preset pattern includes: a plurality of drag reducing grooves, the plurality of drag reducing grooves are sequentially arranged along the circumferential direction of the tire, each drag reducing groove includes a first fold line groove 1 and a second fold line groove 2 arranged crosswise, the first end of the first fold line groove 1 of each drag reducing groove is connected to the first end of the second fold line groove 2, the second end of the first fold line groove 1 of each drag reducing groove and the second end of the second fold line groove 2 extend to the shoulder of the tire, the extension directions of any two first groove sections can be arranged to intersect, the extension directions of any two second groove sections can be arranged to intersect, and the drag reducing grooves The setting not only reduces the rolling resistance of the tire, but also improves the drainage, mud discharge and other performances of the tire, ensuring the self-cleaning and wear resistance of the tire; a first connecting groove 5 is provided between any two adjacent resistance reducing grooves, and the two ends of the first connecting groove 5 are respectively connected to the two resistance reducing grooves. The setting of the first connecting groove 5 can improve the wet grip ability of the tire, so that the tire of the present invention has both good anti-wet skid performance and low rolling resistance, thereby solving the problem in the prior art that it is difficult for tires used in mixed road conditions to have both good anti-wet skid performance and low rolling resistance.

[0052] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0053] 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.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tire, characterized in that: The tire tread has a tread centerline, and the tread centerline extends along the circumferential direction of the tire. The tire tread is provided with a preset pattern, and the preset pattern includes: A plurality of drag reducing grooves, wherein the plurality of drag reducing grooves are sequentially arranged along the circumferential direction of the tire, each of the drag reducing grooves comprises a first fold line groove (1) and a second fold line groove (2) arranged crosswise, the first end of the first fold line groove (1) of each of the drag reducing grooves is connected to the first end of the second fold line groove (2), the second end of the first fold line groove (1) of each of the drag reducing grooves and the second end of the second fold line groove (2) of each of the drag reducing grooves both extend to the shoulder of the tire, the first fold line groove (1) has a plurality of first groove segments, the second fold line groove (2) has a plurality of second groove segments, the extension directions of any two of the first groove segments can be arranged to intersect, and the extension directions of any two of the second groove segments can be arranged to intersect; A first connecting groove (5) is provided between any two adjacent resistance reducing grooves, and both ends of the first connecting groove (5) are respectively connected to the two resistance reducing grooves.

2. The tire according to claim 1, characterized in that The drag reduction grooves are in a herringbone shape, and a second connecting groove (3) and a third connecting groove (4) are further provided between any two adjacent drag reduction grooves; the two ends of the second connecting groove (3) are respectively connected to the two drag reduction grooves, and the two ends of the third connecting groove (4) are respectively connected to the two drag reduction grooves; the first connecting groove (5), the second connecting groove (3) and the third connecting groove (4) are arranged at intervals along the axial direction of the tire; the groove widths of the first connecting groove (5), the second connecting groove (3) and the third connecting groove (4) gradually increase, and the groove depths of the first connecting groove (5), the second connecting groove (3) and the third connecting groove (4) gradually increase.

3. The tire according to claim 2, characterized in that A fourth connecting groove (6) is arranged between the third connecting groove (4) and the second connecting groove (3) between two adjacent resistance reducing grooves, and both ends of the fourth connecting groove (6) are respectively connected to the third connecting groove (4) and the second connecting groove (3), and the fourth connecting groove (6) comprises three groove sections connected in sequence, and the extension directions of the three groove sections can be arranged to intersect.

4. The tire according to claim 3, characterized in that The groove width of the fourth connecting groove (6) is greater than the groove width of the first connecting groove (5) and less than the groove width of the second connecting groove (3); the groove depth of the fourth connecting groove (6) is greater than the groove depth of the first connecting groove (5) and less than the groove depth of the second connecting groove (3).

5. The tire according to claim 1, characterized in that In the direction from the shoulder of the tire to the center line of the tread, the groove width of the first fold line groove (1) gradually decreases, and the groove width of the second fold line groove (2) gradually decreases. The value range of the groove width d1 of the first fold line groove (1) is 14.5mm≤d1≤20mm, and the value range of the groove width d2 of the second fold line groove (2) is 14.5mm≤d2≤20mm.

6. The tire according to claim 1, characterized in that Along the groove width direction of the first fold line groove (1), the first fold line groove (1) has a first groove wall (11) and a second groove wall (12) arranged opposite to each other, the first groove wall (11) is extended along a first preset fold line segment, the first preset fold line segment comprises a first straight line segment (13), a second straight line segment (14), a third straight line segment (15) and a fourth straight line segment (151) connected in sequence, the fourth straight line segment (151) is arranged close to the tread center line relative to the first straight line segment (13), the angle between the first straight line segment (13) and the axis of the tire is θ1, the angle between the second straight line segment (14) and the axis of the tire is θ2, the angle between the third straight line segment (15) and the axis of the tire is θ3, and the angle between the fourth straight line segment (151) and the axis of the tire is θ4; wherein θ1<θ2<θ4<θ3.

7. The tire according to claim 6, characterized in that The second groove wall (12) is extended along a second preset fold line segment, the second preset fold line segment comprises a fifth straight line segment (16), a sixth straight line segment (17), a seventh straight line segment (18) and an eighth straight line segment (19) which are connected in sequence, the eighth straight line segment (19) being arranged close to the tread centerline relative to the fifth straight line segment (16), the angle between the fifth straight line segment (16) and the axis of the tire is θ5, the angle between the sixth straight line segment (17) and the axis of the tire is θ6, the angle between the seventh straight line segment (18) and the axis of the tire is θ7, and the angle between the eighth straight line segment (19) and the axis of the tire is θ8; wherein θ5<θ6<θ8<θ7.

8. The tire according to claim 6, characterized in that The angle between the first groove wall (11) and the mid-vertical plane of the groove bottom of the first fold line groove (1) is a first preset angle β1, and the angle between the second groove wall (12) and the mid-vertical plane of the groove bottom of the first fold line groove (1) is a second preset angle β2, β1>β2.

9. The tire according to claim 1, characterized in that A first reinforcing rib (7) is arranged in a groove section close to the tread centerline of the first fold line groove (1) of each of the drag reducing grooves, and a second reinforcing rib (8) is arranged in a groove section close to the tire shoulder of the first fold line groove (1) of each of the drag reducing grooves.

10. The tire according to claim 1, characterized in that The treads each include a plurality of tread portions sequentially arranged along the circumferential direction of the tire, the length of each tread portion along the circumferential direction of the tire being a preset pitch, the preset pitch of each tread portion being any one of three different pitch lengths, the three pitch lengths being a first pitch length, a second pitch length and a third pitch length, respectively; among the plurality of tread portions, at least one tread portion has a pitch length of the first pitch length, at least one tread portion has a pitch length of the second pitch length, and at least one tread portion has a pitch length of the third pitch length; wherein the ratio of the first pitch length, the second pitch length and the third pitch length is: 1.095：1：0.933。

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