Tire

Abstract

The utility model provides a tire, a tread center groove divides the tread of the tire into two tread parts, each tread part is provided with preset patterns, each preset pattern comprises a first longitudinal groove, a second longitudinal groove and a third longitudinal groove, the first longitudinal grooves extend along the circumferential direction of the tire, and the first longitudinal grooves and the tread center groove are arranged at intervals along the width direction of the tire; the grooves are sequentially formed in the circumferential direction of the tire at intervals, the first end of each groove extends to a tire shoulder of the tire, and the second end of each groove extends towards the tread center groove and is connected and communicated with the first longitudinal groove; the connecting grooves are sequentially formed in the circumferential direction of the tire at intervals, each connecting groove is formed between the first longitudinal groove and the tread center groove, the first end of each connecting groove is connected and communicated with the tread center groove, and the second end of each connecting groove is connected and communicated with the first longitudinal groove. The mining dump truck tire solves the problem that a mining dump truck tire in the prior art is difficult to have good controllability and better heat resistance at the same time.

Description

Technical Field

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

[0002] The climate conditions and road conditions of different mines in different regions of the world are different. Mining dump truck tires need to be suitable for the local mining environment. For example, Southeast Asia has a tropical rainforest climate with high temperatures and heavy rains all year round. In addition, mining roads are all unpaved roads in the wild. The road conditions are complex and diverse. The road surface is muddy and slippery, uneven and full of gravel. Tires are prone to slipping, resulting in thermal delamination, cutting delamination, and excessive wear, which cannot achieve the ideal service life.

[0003] However, the current market lacks comprehensive products with good controllability, good heat resistance, good wear resistance and good cutting resistance, which results in the inability to improve the mining efficiency of some mines and increases the cost of users. Utility Model Content

[0004] The main purpose of the utility model is to provide a tire to solve the problem that the tires for mining dump trucks in the prior art are difficult to have both good controllability and good heat resistance.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a tire, wherein a center groove of the tread extends along the circumferential direction of the tire to divide the tread of the tire into two tread portions, each tread portion is provided with a preset pattern, and the preset pattern includes: a first longitudinal groove, the first longitudinal groove extends along the circumferential direction of the tire, and the first longitudinal groove and the center groove of the tread are spaced apart along the width direction of the tire; a plurality of grooves spaced apart in sequence along the circumferential direction of the tire, the first end of each groove extends to the shoulder of the tire, the second end of each groove extends toward the center groove of the tread and is connected and penetrated with the first longitudinal groove; a plurality of connecting grooves spaced apart in sequence along the circumferential direction of the tire, each connecting groove is provided between the first longitudinal groove and the center groove of the tread, the first end of each connecting groove is connected and penetrated with the center groove of the tread, and the second end of each connecting groove is connected and penetrated with the first longitudinal groove.

[0006] Furthermore, the tire has a predetermined plane parallel to its central axis, the projection of the center line of the tread center groove on the predetermined plane is a symmetry line, and the projections of the preset patterns on the two tread portions on the predetermined plane are symmetrically arranged relative to the symmetry line.

[0007] Furthermore, the groove width of each groove gradually decreases from the first end to the second end of each groove, wherein the minimum groove width of each groove ranges from 50mm to 55mm, and the maximum groove width of each groove ranges from 70mm to 75mm.

[0008] Furthermore, along the width direction of each groove, each groove has a first groove wall and a second groove wall that are relatively arranged, the first groove wall is extended along a first preset straight line segment, and the second groove wall is extended along a second preset straight line segment, and from the first end of each groove to the second end of each groove, the first preset straight line segment gradually extends toward a direction close to the second groove wall, and the second preset straight line segment gradually extends toward a direction close to the first groove wall.

[0009] Furthermore, in the direction from the first end of each groove to the second end of each groove, the first preset straight line segment includes a first straight line segment and a second straight line segment arranged in sequence, the second preset straight line segment includes a third straight line segment and a fourth straight line segment arranged in sequence, the angle between the first straight line segment and the width direction of the tire is 3°, and the angle between the second straight line segment and the width direction of the tire is 10°; the angle between the third straight line segment and the width direction of the tire is 3°, and the angle between the fourth straight line segment and the width direction of the tire is 6°.

[0010] Furthermore, the groove depth of each groove ranges from 75mm to 85mm, and the groove depths of multiple grooves in each tread portion are equal; the groove bottom of each groove in a cross section perpendicular to its extension direction is a portion of an arc segment of a first preset circle; along the width direction of each groove, each groove has a first groove side wall and a second groove side wall that are relatively arranged, and the angle between the first groove side wall and the second groove side wall is 20° to 30°.

[0011] Furthermore, the groove depth of each first longitudinal groove ranges from 55mm to 65mm, and the groove depths of the first longitudinal grooves of the two tread portions are equal; the groove bottom of each first longitudinal groove in a cross section perpendicular to its extension direction is a portion of an arc segment of a second preset circle; along the width direction of each first longitudinal groove, each first longitudinal groove has a third groove side wall and a fourth groove side wall that are relatively arranged, and the angle between the third groove side wall and the fourth groove side wall is 4° to 8°.

[0012] Furthermore, the groove depth of the center groove of the tread ranges from 30 mm to 40 mm; the groove bottom of the cross section of the center groove of the tread perpendicular to its extension direction is a portion of an arc segment of a third preset circle; along the width direction of the center groove of the tread, the center groove of the tread has a fifth groove sidewall and a sixth groove sidewall that are relatively arranged, and the angle between the fifth groove sidewall and the sixth groove sidewall is 4° to 6°.

[0013] Furthermore, from the first end of each connecting groove to the second end of each connecting groove, the width of each connecting groove remains unchanged, and the value range of the width of each connecting groove is 3mm to 5mm; the value range of the groove depth of each connecting groove is 40mm to 50mm; the groove bottom of each connecting groove in the cross section perpendicular to its extension direction is a part of the arc segment of the fourth preset circle; along the width direction of each connecting groove, each connecting groove has a seventh groove side wall and an eighth groove side wall that are relatively arranged, and the seventh groove side wall and the eighth groove side wall are parallel to the normal extension surface of the groove bottom of the connecting groove.

[0014] Furthermore, each preset pattern on the tread portion also includes a plurality of transverse grooves arranged in sequence and at intervals along the circumferential direction of the tire, the first end of each transverse groove extends to the shoulder of the tire, the second end of each transverse groove extends toward the center groove of the tread and is connected to and penetrates the first longitudinal groove; wherein, along the circumferential direction of the tire, each transverse groove and each concave groove are alternately arranged.

[0015] By applying the technical solution of the utility model, the tire of the utility model improves the rigidity and traction performance of the tire and enhances the handling of the tire by arranging multiple grooves on each tread portion, and enhances the handling of the tire by arranging a first longitudinal groove on each tread portion; by arranging multiple connecting grooves on each tread portion to connect the tread center groove and the first longitudinal groove, the two connecting grooves (a connecting groove on each tread portion) and the tread center groove form a "cross" shape, which effectively improves the air flow, so that the heat generated by the middle tread of the tire is quickly taken away by the flowing air, thereby achieving a better heat dissipation effect and reducing the probability of thermal delamination of the tire, that is, it plays a role in improving the heat dissipation of the tire, reducing the heat generation of the tire, and increasing the handling of the tire. The tire of the present application is a mining dump truck tire, thereby solving the problem that mining dump truck tires in the prior art are difficult to have both good handling and good heat resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting 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 on the present invention. In the drawings:

[0017] Figure 1 A schematic diagram showing an embodiment of a preset pattern of a tire according to the utility model;

[0018] Figure 2 Shows Figure 1 A partial cross-sectional view of the section at AA;

[0019] Figure 3 Shows Figure 1 A partial cross-sectional view of the section at BB;

[0020] Figure 4 Shows Figure 1 A partial cross-sectional view of the section at CC;

[0021] Figure 5 Shows Figure 1 Partial cross-sectional view of the section at DD in the middle.

[0022] The above drawings include the following reference numerals:

[0023] 10. Center groove of tread; 20. First longitudinal groove; 30. Concave groove; 40. Connecting groove; 31. First groove wall; 32. Second groove wall; 33. First straight line segment; 34. Second straight line segment; 35. Third straight line segment; 36. Fourth straight line segment; 38. First groove sidewall; 39. Second groove sidewall; 21. Third groove sidewall; 22. Fourth groove sidewall; 13. Fifth groove sidewall; 14. Sixth groove sidewall; 41. Seventh groove sidewall; 42. Eighth groove sidewall; 60. Transverse groove; 311. Wear mark; 61. Fifth straight line segment; 62. First arc segment; 63. Sixth straight line segment; 64. Second arc segment; 65. Seventh straight line segment; 1. First tread sub-portion; 2. Second tread sub-portion. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Please refer to Figures 1 to 5 The utility model provides a tire, wherein a tread center groove 10 extends along the circumferential direction of the tire to divide the tread of the tire into two tread portions, each tread portion being provided with a preset pattern, the preset pattern comprising: a first longitudinal groove 20, the first longitudinal groove 20 extending along the circumferential direction of the tire, the first longitudinal groove 20 and the tread center groove 10 being spaced apart along the width direction of the tire; a plurality of grooves 30 spaced apart in sequence along the circumferential direction of the tire, the first end of each groove 30 extending to the shoulder of the tire, the second end of each groove 30 extending toward the tread center groove 10 and connected to and penetrating the first longitudinal groove 20; a plurality of connecting grooves 40 spaced apart in sequence along the circumferential direction of the tire, each connecting groove 40 being provided between the first longitudinal groove 20 and the tread center groove 10, the first end of each connecting groove 40 being connected to and penetrating the tread center groove 10, and the second end of each connecting groove 40 being connected to and penetrating the first longitudinal groove 20.

[0028] The utility model improves the rigidity and traction performance of the tire and enhances the handling of the tire by arranging a plurality of grooves 30 on each tread portion, and enhances the handling of the tire by arranging a first longitudinal groove 20 on each tread portion; and enhances the handling of the tire by arranging a plurality of connecting grooves 40 on each tread portion to connect the tread center groove 10 and the first longitudinal groove 20, so that two connecting grooves 40 (a connecting groove 40 on each tread portion) and the tread center groove 10 form a "cross" shape, which effectively improves the air flow, so that the heat generated by the middle tread of the tire is quickly taken away with the flowing air, thereby achieving a better heat dissipation effect and reducing the probability of thermal delamination of the tire, that is, it plays a role in improving the heat dissipation of the tire, reducing the heat generation of the tire, and increasing the handling of the tire. The tire of the present application is a mining dump truck tire, thereby solving the problem that mining dump truck tires in the prior art are difficult to have both good handling and good heat resistance.

[0029] Specifically, Figure 1As shown, the first longitudinal groove 20 on each tread portion divides each tread portion into a first tread sub-portion 1 and a second tread sub-portion 2, the second tread sub-portion 2 is arranged between the first longitudinal groove 20 and the tread center groove 10, and the area jointly formed by the second tread sub-portions 2 on the two tread portions is defined as the central wear heat generating area (that is, the edge line of the first longitudinal groove 20 on each tread portion close to the tread center groove 10 is the boundary line, and the area jointly surrounded by the boundary lines on the two tread portions is the central wear heat generating area), that is Figure 1 The area in the dashed box.

[0030] Due to the effect of centrifugal force when the tire is running, the ground contact footprint becomes smaller and is mainly concentrated in the central wear heat generating area. Therefore, the sea-to-land ratio in the central wear heat generating area has a greater impact on the wear resistance and heat dissipation performance of the tire, especially on harsh roads and under heavy load conditions. The sea-to-land ratio in the central wear heat generating area has a greater impact on the wear resistance and heat dissipation traction performance of the tire. If the sea-to-land ratio in the central wear heat generating area is too large, the heat dissipation and traction performance will deteriorate. If the sea-to-land ratio in the central wear heat generating area is too small, the wear resistance and puncture resistance will deteriorate. Therefore, in the tire of the present application, while ensuring that the overall sea-to-land ratio of the tire remains unchanged, the total area of ​​the transverse cross-section of the pattern block formed by the tread center groove 10, all the first longitudinal grooves 20 and all the connecting grooves 40 in the central wear heat generating area is made to be 70% to 75% of the tread area of ​​the central wear heat generating area, so that the central wear heat generating area of ​​the tire of the present application has an optimal sea-to-land ratio, and thus the tire of the present application achieves the optimal heat dissipation and wear resistance on the basis of meeting the traction performance and puncture resistance. Among them, the transverse cross-section of the pattern block is parallel to the tread portion, the sea-to-land ratio of the central wear heat generating zone refers to the percentage of the total area of ​​all pattern blocks in the central wear heat generating zone to the tread area of ​​the central wear heat generating zone, and the overall sea-to-land ratio of the tire refers to the percentage of the total area of ​​all pattern blocks in the tire to the overall tread area.

[0031] like Figure 1 As shown, L3 is the lateral width of each tread portion. The lateral width L1 of the first tread sub-portion 1 accounts for 58% to 62% of L3, and the lateral width L2 of the second tread sub-portion 2 accounts for 38% to 42% of L3. This is the optimal ratio for improving tire rigidity and handling, thereby improving the tire's wear resistance, cut resistance and driving safety.

[0032] In this embodiment, if Figure 1 As shown, the tire has a predetermined plane parallel to its central axis, the projection of the center line of the tread center groove 10 on the predetermined plane is a symmetry line, and the projections of the preset patterns on the two tread portions on the predetermined plane are symmetrically arranged relative to the symmetry line.

[0033] Specifically, the lateral widths of the two tread portions are equal, and the lateral width direction of each tread portion is parallel to the extending direction of the central axis of the tire.

[0034] Specifically, the preset patterns on the two tread portions are symmetrically arranged relative to the symmetry line, which helps to reduce the rolling resistance of the tire.

[0035] In this embodiment, if Figure 1 As shown, the groove width of each groove 30 gradually decreases from the first end of each groove 30 to the second end of each groove 30, wherein the minimum groove width of each groove 30 ranges from 50mm to 55mm, and the maximum groove width of each groove 30 ranges from 70mm to 75mm.

[0036] Specifically, by optimizing the groove width of each groove 30 , it is ensured that each groove 30 can improve the rigidity and traction performance of the tire and enhance the handling of the tire.

[0037] In this embodiment, along the width direction of each groove 30, each groove 30 has a first groove wall 31 and a second groove wall 32 that are relatively arranged, the first groove wall 31 is extended along a first preset straight line segment, and the second groove wall 32 is extended along a second preset straight line segment. From the first end of each groove 30 to the second end of each groove 30, the first preset straight line segment gradually extends toward the direction close to the second groove wall 32, and the second preset straight line segment gradually extends toward the direction close to the first groove wall 31.

[0038] Specifically, by optimizing the extension direction of the first groove wall 31 and the second groove wall 32 , it is ensured that each groove 30 can improve the rigidity and traction performance of the tire and enhance the handling of the tire.

[0039] In this embodiment, if Figure 1 As shown, in the direction from the first end of each groove 30 to the second end of each groove 30, the first preset straight line segment includes a first straight line segment 33 and a second straight line segment 34 arranged in sequence, and the second preset straight line segment includes a third straight line segment 35 and a fourth straight line segment 36 arranged in sequence, the angle between the first straight line segment 33 and the width direction of the tire is 3°, and the angle between the second straight line segment 34 and the width direction of the tire is 10°; the angle between the third straight line segment 35 and the width direction of the tire is 3°, and the angle between the fourth straight line segment 36 and the width direction of the tire is 6°.

[0040] Specifically, the width direction of the tire is Figure 1 In the horizontal direction shown in , by optimizing the angle between the first preset straight line segment and the second preset straight line segment and the horizontal direction, it is ensured that each groove 30 can improve the tire rigidity and traction performance, and enhance the handling of the tire.

[0041] Specifically, Figure 1As shown, two wear marks 311 are further provided in each groove 30 . The two wear marks 311 are both provided at one end of each groove 30 close to the tread center groove 10 . The distribution direction of the two wear marks 311 is perpendicular to the extension direction of each groove 30 .

[0042] In this embodiment, if Figure 2 As shown, the groove depth of each groove 30 ranges from 75 mm to 85 mm, and the groove depths of the multiple grooves 30 of each tread portion are equal; the groove bottom of each groove 30 in a cross section perpendicular to its extension direction is a portion of an arc segment of a first preset circle; along the width direction of each groove 30, each groove 30 has a first groove side wall 38 and a second groove side wall 39 that are oppositely arranged, and the angle between the first groove side wall 38 and the second groove side wall 39 is 20° to 30°.

[0043] Specifically, by optimizing the groove depth of each groove 30 , it is ensured that each groove 30 can improve the rigidity and traction performance of the tire and enhance the handling of the tire.

[0044] In this embodiment, if Figure 3 As shown, the groove depth of each first longitudinal groove 20 ranges from 55 mm to 65 mm, and the groove depths of the first longitudinal grooves 20 of the two tread portions are equal; the groove bottom of each first longitudinal groove 20 in a cross section perpendicular to its extension direction is a portion of an arc segment of a second preset circle; along the width direction of each first longitudinal groove 20, each first longitudinal groove 20 has a third groove side wall 21 and a fourth groove side wall 22 that are relatively arranged, and the angle between the third groove side wall 21 and the fourth groove side wall 22 is 4° to 8°.

[0045] Specifically, each first longitudinal groove 20 is sawtooth-shaped. By optimizing the first longitudinal groove 20, it is ensured that the first longitudinal groove 20 can enhance the handling performance of the tire.

[0046] In this embodiment, if Figure 4 As shown, the groove depth of the tread center groove 10 ranges from 30 mm to 40 mm; the groove bottom of the cross section of the tread center groove 10 perpendicular to its extension direction is a partial arc segment of a third preset circle; along the width direction of the tread center groove 10, the tread center groove 10 has a fifth groove sidewall 13 and a sixth groove sidewall 14 that are relatively arranged, and the angle between the fifth groove sidewall 13 and the sixth groove sidewall 14 is 4° to 6°.

[0047] Specifically, by optimizing the tread center groove 10, it is ensured that the tread center groove 10 can enhance the handling of the tire, while ensuring that the tread center groove 10 helps the air flow in the middle tread and enhances the heat dissipation of the tire.

[0048] In this embodiment, if Figure 5As shown, from the first end of each connecting groove 40 to the second end of each connecting groove 40, the width of each connecting groove 40 remains unchanged, and the value range of the width of each connecting groove 40 is 3mm to 5mm; the value range of the groove depth of each connecting groove 40 is 40mm to 50mm; the groove bottom of each connecting groove 40 in a cross section perpendicular to its extension direction is a portion of an arc segment of a fourth preset circle; along the width direction of each connecting groove 40, each connecting groove 40 has a seventh groove side wall 41 and an eighth groove side wall 42 that are relatively arranged, and the seventh groove side wall 41 and the eighth groove side wall 42 are both parallel to the normal extension surface of the groove bottom of the connecting groove 40.

[0049] Specifically, by optimizing the connection groove 40, the heat in the middle of the tread can be dispersed to the left and right sides through the connection groove 40, ensuring that the connection groove 40 can fully promote the air flow in the middle tread and enhance the heat dissipation of the tire.

[0050] Specifically, Figure 1 As shown, from the second end of each connection groove 40 to the first end of each connection groove 40 , each connection groove 40 gradually extends downward.

[0051] In this embodiment, if Figure 1 As shown, the preset patterns on each tread portion also include a plurality of transverse grooves 60 arranged in sequence and at intervals along the circumferential direction of the tire, the first end of each transverse groove 60 extends to the shoulder of the tire, the second end of each transverse groove 60 extends toward the tread center groove 10 and is connected to and passes through the first longitudinal groove 20; wherein, along the circumferential direction of the tire, each transverse groove 60 and each groove 30 are alternately arranged.

[0052] Specifically, Figure 1 As shown, each transverse groove 60 gradually extends downward from the first end of each transverse groove 60 to the second end of each transverse groove 60. Each transverse groove 60 extends along a fourth preset line segment, which includes a fifth straight line segment 61, a first arc segment 62, a sixth straight line segment 63, a second arc segment 64 and a seventh straight line segment 65, wherein the angles between the fifth straight line segment 61 and the seventh straight line segment 65 and the horizontal direction are both 6°, and the angle between the sixth straight line segment 63 and the horizontal direction is 62°.

[0053] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0054] The utility model improves the rigidity and traction performance of the tire and enhances the handling of the tire by arranging a plurality of grooves 30 on each tread portion, and enhances the handling of the tire by arranging a first longitudinal groove 20 on each tread portion; and enhances the handling of the tire by arranging a plurality of connecting grooves 40 on each tread portion to connect the tread center groove 10 and the first longitudinal groove 20, so that two connecting grooves 40 (a connecting groove 40 on each tread portion) and the tread center groove 10 form a "cross" shape, which effectively improves the air flow, so that the heat generated by the middle tread of the tire is quickly taken away with the flowing air, thereby achieving a better heat dissipation effect and reducing the probability of thermal delamination of the tire, that is, it plays a role in improving the heat dissipation of the tire, reducing the heat generation of the tire, and increasing the handling of the tire. The tire of the present application is a mining dump truck tire, thereby solving the problem that mining dump truck tires in the prior art are difficult to have both good handling and good heat resistance.

[0055] 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.

[0056] 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.

[0057] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A tire, characterized in that: The tread center groove (10) extends along the circumferential direction of the tire to divide the tread of the tire into two tread parts, each of which is provided with a preset pattern, and the preset pattern includes: A first longitudinal groove (20), the first longitudinal groove (20) extending in the circumferential direction of the tire, the first longitudinal groove (20) and the tread center groove (10) being spaced apart in the width direction of the tire; A plurality of grooves (30) arranged in sequence and spaced apart in the circumferential direction of the tire, wherein the first end of each of the grooves (30) extends to the shoulder of the tire, and the second end of each of the grooves (30) extends toward the tread center groove (10) and is connected to and penetrates the first longitudinal groove (20); A plurality of connecting grooves (40) are arranged in sequence and at intervals along the circumferential direction of the tire, each of the connecting grooves (40) is arranged between the first longitudinal groove (20) and the tread center groove (10), a first end of each of the connecting grooves (40) is connected to and penetrates the tread center groove (10), and a second end of each of the connecting grooves (40) is connected to and penetrates the first longitudinal groove (20).

2. The tire according to claim 1, characterized in that The tire has a predetermined plane parallel to its central axis, the projection of the center line of the tread center groove (10) on the predetermined plane is a symmetry line, and the projections of the preset patterns on the two tread portions on the predetermined plane are symmetrically arranged relative to the symmetry line.

3. The tire according to claim 1, characterized in that From the first end of each of the grooves (30) to the second end of each of the grooves (30), the groove width of each of the grooves (30) gradually decreases, wherein the minimum groove width of each of the grooves (30) ranges from 50 mm to 55 mm, and the maximum groove width of each of the grooves (30) ranges from 70 mm to 75 mm.

4. The tire according to claim 1, characterized in that Along the width direction of each of the grooves (30), each of the grooves (30) has a first groove wall (31) and a second groove wall (32) which are arranged opposite to each other, the first groove wall (31) is extended along a first preset straight line segment, and the second groove wall (32) is extended along a second preset straight line segment, and in the direction from the first end of each of the grooves (30) to the second end of each of the grooves (30), the first preset straight line segment gradually extends in a direction close to the second groove wall (32), and the second preset straight line segment gradually extends in a direction close to the first groove wall (31).

5. The tire according to claim 4, characterized in that In a direction from the first end of each of the grooves (30) to the second end of each of the grooves (30), the first preset straight line segment includes a first straight line segment (33) and a second straight line segment (34) which are arranged in sequence, the second preset straight line segment includes a third straight line segment (35) and a fourth straight line segment (36) which are arranged in sequence, the angle between the first straight line segment (33) and the width direction of the tire is 3°, the angle between the second straight line segment (34) and the width direction of the tire is 10°; the angle between the third straight line segment (35) and the width direction of the tire is 3°, the angle between the fourth straight line segment (36) and the width direction of the tire is 6°.

6. The tire according to claim 1, characterized in that The groove depth of each groove (30) ranges from 75 mm to 85 mm, and the groove depths of the plurality of grooves (30) of each tread portion are equal; the groove bottom of each groove (30) in a cross section perpendicular to its extension direction is a partial arc segment of a first preset circle; along the width direction of each groove (30), each groove (30) has a first groove side wall (38) and a second groove side wall (39) that are arranged opposite to each other, and the angle between the first groove side wall (38) and the second groove side wall (39) is 20° to 30°.

7. The tire according to claim 1, characterized in that The groove depth of each of the first longitudinal grooves (20) ranges from 55 mm to 65 mm, and the groove depths of the first longitudinal grooves (20) of the two tread portions are equal; the groove bottom of each of the first longitudinal grooves (20) in a cross section perpendicular to its extension direction is a partial arc segment of a second preset circle; along the width direction of each of the first longitudinal grooves (20), each of the first longitudinal grooves (20) has a third groove side wall (21) and a fourth groove side wall (22) that are arranged opposite to each other, and the angle between the third groove side wall (21) and the fourth groove side wall (22) is 4° to 8°.

8. The tire according to claim 1, characterized in that The groove depth of the tread center groove (10) ranges from 30 mm to 40 mm; the groove bottom of the cross section of the tread center groove (10) perpendicular to its extension direction is a partial arc segment of a third preset circle; along the width direction of the tread center groove (10), the tread center groove (10) has a fifth groove side wall (13) and a sixth groove side wall (14) arranged opposite to each other, and the angle between the fifth groove side wall (13) and the sixth groove side wall (14) is 4° to 6°.

9. The tire according to claim 1, characterized in that In the direction from the first end of each of the connecting grooves (40) to the second end of each of the connecting grooves (40), the width of each of the connecting grooves (40) remains unchanged, and the value range of the width of each of the connecting grooves (40) is 3 mm to 5 mm; the value range of the depth of each of the connecting grooves (40) is 40 mm to 50 mm; the bottom of each of the connecting grooves (40) in a cross section perpendicular to its extension direction is a portion of an arc segment of a fourth preset circle; along the width direction of each of the connecting grooves (40), each of the connecting grooves (40) has a seventh groove side wall (41) and an eighth groove side wall (42) that are arranged opposite to each other, and the seventh groove side wall (41) and the eighth groove side wall (42) are both parallel to the normal extension surface of the bottom of the connecting groove (40).

10. The tire according to claim 1, characterized in that The preset patterns on each of the tread portions also include a plurality of transverse grooves (60) arranged in sequence and at intervals along the circumferential direction of the tire, the first end of each of the transverse grooves (60) extending to the shoulder of the tire, the second end of each of the transverse grooves (60) extending toward the tread center groove (10) and connected to and penetrating the first longitudinal groove (20); wherein, along the circumferential direction of the tire, each of the transverse grooves (60) and each of the grooves (30) are alternately arranged.

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