Sand tire

Abstract

The invention discloses a sand tire, and belongs to the technical field of tires of vehicles running on sand, the main points of the technical scheme are that the sand tire comprises a tire body, the tire body is connected with a plurality of digging blocks, and the plurality of digging blocks are distributed at intervals along the circumferential direction of the tire body; the digging block comprises a first digging part and a second digging part, the first end of the first digging part is connected with the tire body, the second digging part is connected with the second end of the first digging part, and the second digging part is located at the front end of the first digging part in the advancing direction; the first digging part, the second digging part and the tire body form a digging space with an opening in one side, sand can be dug in the running process of a vehicle, and the effect of enhancing the traction force and the anti-skid performance of the tire in the sand environment is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of tires for vehicles traveling on sandy terrain, and in particular to a sandy terrain tire. Background Art

[0002] When driving on sandy terrain, tires often slip or get stuck, which not only affects the driving experience but also may cause serious safety hazards. In order to improve the vehicle's passability and stability in sandy environments, researchers have been exploring various improvement methods.

[0003] Some sand tires usually adopt the following design solutions: First, increase the width and contact area of ​​the tire to disperse the weight of the vehicle and reduce the possibility of tire sinking. Second, add raised anti-slip blocks or adopt special tread pattern design to improve grip performance by increasing friction.

[0004] Although the above technical means have improved the performance of sand tires to a certain extent, there are still obvious shortcomings. Especially in the face of soft and complex sandy environments, the traditional wide tire design increases the contact area, but also brings additional weight burden, affecting the vehicle's handling and fuel economy. Simple anti-slip blocks or special tread pattern designs are difficult to provide sufficient grip in extreme cases, which can easily cause the vehicle to slip or get stuck. Therefore, how to further improve the anti-skid performance and traction of sand tires while ensuring lightweight is still a technical problem that needs to be solved urgently. Summary of the invention

[0005] In order to enhance the traction and anti-skid performance of a tire in a sandy environment, the present invention provides a sandy tire.

[0006] The present invention provides a sand tire adopting the following technical solution: A sand tire comprises a tire body, the tire body is connected to a plurality of digging blocks, the plurality of digging blocks are spaced apart along the circumference of the tire body; the digging blocks comprise a first digging part and a second digging part, a first end of the first digging part is connected to the tire body, the second digging part is connected to the second end of the first digging part, and the second digging part is located at the front end of the first digging part along the forward direction, the first digging part, the second digging part and the tire body form a digging space with an opening on one side, and can dig sand during vehicle driving.

[0007] By adopting the above technical solution, during the driving of the tire, the digging blocks quickly cut into the sand to form a stable support point, thereby reducing wheel slippage and improving the handling and stability of the vehicle. Among them, multiple digging blocks are spaced along the circumference of the tire body, so that the tire can evenly dig the sand during driving, improving grip and traction. The design of the position of the second digging part enables the second digging part to better cut into the sand when the vehicle is driving, further enhancing the digging ability and anti-skid performance of the tire. In summary, the sand tire can effectively improve the grip and traction when driving on soft sand.

[0008] Preferably, the excavation block is provided with a first excavation front side and a first excavation back side, the first excavation front side is provided with a first arc surface and a second arc surface, the first arc surface is located on the side of the second arc surface away from the tire body, and the diameter of the second arc surface is larger than the diameter of the first arc surface, and the first excavation back side is provided with a third arc surface, and the diameter of the third arc surface is larger than the diameter of the second arc surface.

[0009] By adopting the above technical solution, the design of the first digging front surface and the first digging back surface enables the digging block to cut into the sand more effectively during the driving process of the vehicle, thereby improving the grip and traction of the tire. Specifically, the design of the first curved surface and the second curved surface enables the digging block to cut into the sand quickly when it contacts the sand, thereby reducing the slipping phenomenon; and the diameter of the third curved surface is larger than the diameter of the second curved surface, thereby further enhancing the stability of the digging block in the sand, thereby improving the stability and passing ability of the entire tire.

[0010] Preferably, the digging block is located on the tread centerline of the tire body.

[0011] By adopting the above technical solution, it is possible to ensure that the digging block remains stable during vehicle driving, improve the vehicle's grip and traction on sand, and reduce the risk of tire deviation, allowing the vehicle to drive more smoothly.

[0012] Preferably, the tire body is connected with auxiliary pattern blocks, and the auxiliary pattern blocks are evenly distributed along the circumference of the tire body. The auxiliary pattern blocks include a pattern portion and an auxiliary digging portion, and the pattern portion is connected to the tire body. A plurality of auxiliary digging portions are provided, and the plurality of auxiliary digging portions are all connected to an end of the pattern portion away from the tire body, and the auxiliary digging portions are located at the front end of the pattern portion along the forward direction, and the auxiliary digging portions can dig sand during vehicle driving.

[0013] By adopting the above technical solution, the auxiliary pattern blocks can enhance the grip and traction performance of the tire, especially on soft roads such as sand. The auxiliary digging part on the auxiliary pattern blocks can further dig into the sand during the vehicle driving process, improving the anti-skid performance and stability of the tire. In addition, the design of the auxiliary pattern blocks uniformly distributed along the circumference of the tire body ensures that the tire is evenly stressed, reduces local wear, and extends the service life of the tire.

[0014] Preferably, a plurality of the auxiliary digging parts are symmetrically arranged about the tread centerline.

[0015] By adopting the above technical solution, the auxiliary digging part is symmetrically distributed to ensure that the left and right forces of the vehicle are balanced when driving on the sand, thereby improving the stability and controllability of the vehicle. At the same time, it also helps to reduce the unevenness of tire wear and extend the service life of the tire.

[0016] Preferably, the auxiliary tread block is provided with a second digging front side and a second digging back side, the second digging front side includes a fourth arc surface and a fifth arc surface, the fourth arc surface is arranged on the side of the fifth arc surface away from the tire body, and the diameter of the fourth arc surface is greater than the diameter of the fifth arc surface, the diameter of the fifth arc surface is greater than the diameter of the second arc surface, and the second digging back side is provided with a sixth arc surface, and the diameter of the sixth arc surface is greater than the diameter of the third arc surface.

[0017] By adopting the above technical solution, the second digging front and second digging back designs on the auxiliary pattern blocks can significantly improve the tire's grip and traction in the sand. Specifically, the design of the fourth and fifth curved surfaces enables the tire to better cut into the sand when driving, thereby reducing slippage. At the same time, the diameter of the sixth curved surface is greater than the diameter of the third curved surface, further enhancing the tire's support capacity and stability in the sand, improving the vehicle's passability and safety, while also improving driving comfort.

[0018] Preferably, the tire body is connected with a first pattern component and a second pattern group, the first pattern group and the second pattern group are respectively arranged on both sides of the digging block; the first pattern component is provided with multiple groups, and the multiple groups of the first pattern groups are arranged at intervals along the circumferential direction of the tire body; the second pattern component is provided with multiple groups, and the multiple groups of the second pattern groups are arranged at intervals along the circumferential direction of the tire body; The first pattern group and the second pattern group have the same structure. The top surface of the first pattern group is arranged along the circumferential arc of the tire body, and the height of the first pattern group gradually decreases along the forward direction. The lowest point of the top surface of the first pattern group is the same as the height of the digging block.

[0019] By adopting the above technical solution, during the driving process of the tire, the first pattern component and the second pattern group significantly increase the contact area between the tire and the ground, and the cambered surface design can better adapt to the sandy terrain, improving the tire's grip and anti-skid performance; at the same time, the cambered surface design can effectively disperse the force on the tire and reduce the wear caused by excessive local pressure on the tire. During the driving process of the tire, the digging block can quickly cut into and push the sand in front, effectively reducing the risk of the tire sinking. The first pattern component and the second pattern group work together with the digging block to improve the suspension force. This not only enhances the overall grip, but also enables the vehicle to have better handling stability and acceleration performance during driving, further improving the vehicle's passability and safety in sandy environments.

[0020] Preferably, the first pattern group includes a first pattern block and a second pattern block, the first pattern block and the second pattern block are arranged at intervals, and both are connected to the tire body, and the first pattern block is located at the front end of the second pattern block along the forward direction; The top end of the second pattern block is provided with an inclined portion, the inclined portion is inclined toward the shoulder direction, the inclined portion is provided with an inclined surface, and the area of ​​the inclined surface gradually increases from one end close to the first pattern block to the other end.

[0021] By adopting the above technical solution, the spacing between the first pattern block and the second pattern block can improve the drainage performance of the tire, reduce the accumulation of mud and sand, and thus improve the grip of the tire on wet or soft ground. The inclined portion arranged at the top of the second pattern block is inclined toward the shoulder of the tire to guide the sand and facilitate sand discharge. The inclined surface further guides the sand, further improving the sand discharge performance.

[0022] Preferably, the first pattern group and the second pattern group are staggered.

[0023] By adopting the above technical solution, the staggered arrangement of the first pattern group and the second pattern group can effectively improve the tire's grip and traction performance in sand, reduce the problem of local pressure concentration caused by pattern group alignment, thereby reducing tire slippage and improving the vehicle's driving stability in sandy environments.

[0024] In summary, the present invention has the following beneficial effects: 1. During the driving process of the tire, the digging blocks quickly cut into the sand to form a stable support point, thereby reducing wheel slippage and improving the handling and stability of the vehicle. Among them, multiple digging blocks are spaced along the circumference of the tire body, so that the tire can evenly dig the sand during driving, improving grip and traction. The design of the position of the second digging part enables the second digging part to better cut into the sand when the vehicle is driving, further enhancing the digging ability and anti-skid performance of the tire. In summary, this sand tire can effectively improve grip and traction when driving on soft sand; 2. The use of auxiliary tread blocks and digging blocks further enhances the anti-skid performance of the tire and improves the driving safety and efficiency of the vehicle in complex sandy environments; 3. During the driving process, the digging block can quickly cut into and push the sand in front, effectively reducing the risk of tire sinking. The first pattern component and the second pattern group work together with the digging block to improve the suspension force. This not only enhances the overall grip, but also makes the vehicle have better handling stability and acceleration performance during driving, further improving the vehicle's ability to pass and safety in sandy environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of a sand tire in Example 1.

[0026] Figure 2 It is a schematic diagram of the structure of mining blocks.

[0027] Figure 3 It is a schematic diagram of the overall structure of a sand tire in Example 2.

[0028] Figure 4 It is a schematic diagram of the structure of the auxiliary pattern block.

[0029] Figure 5 It is a schematic diagram of the overall structure of a sand tire in Example 3.

[0030] Figure 6 It is a schematic diagram of the arc of the first pattern component.

[0031] Figure 7 It is a schematic diagram of the position of the inclined portion.

[0032] Description of reference numerals: 1. Tire body; 2. Digging block; 21. First digging part; 22. Second digging part; 23. First digging front side; 231. First arc surface; 232. Second arc surface; 24. First digging back side; 241. Third arc surface; 3. Auxiliary tread block; 31. Tread part; 32. Auxiliary digging part; 33. Second digging front side; 331. Fourth arc surface; 332. Fifth arc surface; 34. Second digging back side; 341. Sixth arc surface; 4. First tread group; 41. First tread block; 42. Second tread block; 421. Inclined part; 4211. Inclined surface; 5. Second tread group. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0034] A sand tire, referring to Figure 1 and Figure 2 , including a tire body 1, the tire body 1 is connected with a plurality of digging blocks 2, and the plurality of digging blocks 2 are distributed at intervals along the circumference of the tire body 1. The digging block 2 includes a first digging part 21 and a second digging part 22. The first end of the first digging part 21 is connected to the tire body 1, the second digging part 22 is connected to the second end of the first digging part 21, and the second digging part 22 is located at the front end of the first digging part 21 along the forward direction. The first digging part 21, the second digging part 22 and the tire body 1 are integrally formed. Among them, the first digging part 21, the second digging part 22 and the tire body 1 form an excavation space with an opening on one side, which can dig sand during the driving of the vehicle.

[0035] During the driving process of the tire, the digging block 2 can quickly cut into the sand to form a stable support point, thereby reducing wheel slippage and improving the handling and stability of the vehicle. Among them, multiple digging blocks 2 are distributed at intervals along the circumference of the tire body 1, so that the tire can evenly dig the sand during driving, improving grip and traction. The design of the position of the second digging part 22 enables the second digging part 22 to better cut into the sand when the vehicle is driving, further enhancing the digging ability and anti-skid performance of the tire.

[0036] Reference Figure 1 and Figure 2 , the height of the digging block 2 is 10 mm. A plurality of digging blocks 2 are all located on the tread center line of the tire body 1.

[0037] It can ensure that the digging block 2 remains stable during the driving of the vehicle, improve the grip and traction of the vehicle on the sand, and reduce the risk of tire deviation, so that the vehicle can drive more smoothly.

[0038] Reference Figure 1 and Figure 2 The thickness of the second digging part 22 at one end away from the first digging part 21 is 2 mm-5 mm, preferably 2.5 mm.

[0039] Reference Figure 1 and Figure 2 The excavation block 2 is provided with a first excavation front face 23 and a first excavation back face 24, the first excavation front face 23 is provided with a first arc surface 231 and a second arc surface 232, the first arc surface 231 is located on the side of the second arc surface 232 away from the tire body 1, and the diameter of the second arc surface 232 is greater than the diameter of the first arc surface 231. The radius of the first arc surface 231 is preferably 3 mm, and the radius of the second arc surface 232 is preferably 4 mm.

[0040] The design of the first curved surface 231 and the second curved surface 232 enables the excavating block 2 to quickly cut into the sand when in contact with the sand. The larger arc of the second curved surface 232 can ensure that the contact with the sand remains relatively stable during the excavation process, thereby reducing slippage.

[0041] Reference Figure 1 and Figure 2 The first digging back surface 24 is provided with a third camber 241, and the diameter of the third camber 241 is greater than the diameter of the second camber 232. This further enhances the stability of the digging block 2 in the sand, and improves the stability and passing capacity of the entire tire. The radius of the third camber 241 is preferably 10 mm.

[0042] The application principle of the present invention is as follows: by arranging a plurality of digging blocks 2 on the tire body 1, the sand can be effectively dug, and the tire's grip and passability can be improved. This design not only solves the problem of traditional tires being prone to slipping and getting stuck when driving on sand, but also improves the adaptability and safety of the vehicle in complex terrain.

[0043] Example 2 A sand tire, which is different from Example 1 in that Figure 3 The tire body 1 is connected with an auxiliary pattern block 3, and the auxiliary pattern block 3 is integrally formed with the tire body 1. A plurality of auxiliary pattern blocks 3 are provided, and the plurality of auxiliary pattern blocks 3 are evenly distributed along the circumference of the tire body 1.

[0044] The auxiliary pattern blocks 3 can enhance the grip and traction performance of the tire, especially on soft roads such as sand.

[0045] Reference Figure 3 Every two adjacent excavating blocks 2 are set as a group, every two adjacent auxiliary pattern blocks 3 are set as a group, and a group of excavating blocks 2 is arranged between each group of auxiliary pattern blocks 3.

[0046] Too many digging blocks 2 may reduce the contact area between the tire and the sand, which may lead to insufficient traction. Therefore, the number design of this embodiment can ensure the traction of the tire and improve the anti-skid performance.

[0047] Reference Figure 4 The auxiliary pattern block 3 includes a pattern portion 31 and an auxiliary digging portion 32. The first end of the pattern portion 31 is connected to the tire body 1, and the second end is connected to the auxiliary digging portion 32. A plurality of auxiliary digging portions 32 are provided, and the plurality of auxiliary digging portions 32 are all provided at the front end of the pattern portion 31 along the forward direction. The auxiliary digging portions 32 can further dig sand during the driving of the vehicle, thereby improving the anti-skid performance and stability of the tire.

[0048] Reference Figure 3 and Figure 4 The maximum height of the pattern portion 31 is located on the crown centerline of the tire body 1, and the maximum height is 25 mm. The height of the pattern portion 31 gradually decreases from the crown centerline to the shoulder.

[0049] Reference Figure 3 and Figure 4 In this embodiment, three auxiliary digging parts 32 are provided, and the three auxiliary digging parts 32 are symmetrically arranged about the tread centerline. The thickness of the free end of the auxiliary digging part 32 away from the pattern part 31 is 2mm-5mm, preferably 3mm. The height of the auxiliary digging part 32 changes with the change of the pattern part 31.

[0050] The three auxiliary digging parts 32 are symmetrically distributed on both sides of the tire, thereby ensuring that the left and right forces of the vehicle are balanced when driving on sand, thereby improving the stability and controllability of the vehicle.

[0051] Reference Figure 3 and Figure 4 The auxiliary pattern block 3 is provided with a second excavation front face 33, the second excavation front face 33 includes a fourth arc surface 331 and a fifth arc surface 332, the fourth arc surface 331 is provided on the side of the fifth arc surface 332 away from the tire body 1, and the diameter of the fourth arc surface 331 is greater than the diameter of the fifth arc surface 332, and the diameter of the fifth arc surface 332 is greater than the diameter of the second arc surface 232. Among them, the preferred radius of the fourth arc surface 331 is 9 mm, and the radius of the fifth arc surface 332 is preferably 8 mm.

[0052] The design of the fourth curved surface 331 and the fifth curved surface 332 enables the tire to cut into the sand better during driving, thereby reducing slipping.

[0053] Reference Figure 3 and Figure 4 The auxiliary tread block 3 is provided with a second excavation back surface 34, and the second excavation back surface 34 is provided with a sixth arc surface 341. The diameter of the sixth arc surface 341 is greater than the diameter of the third arc surface 241, and the radius of the sixth arc surface 341 is preferably 20 mm.

[0054] The design of the sixth curved surface 341 further enhances the supporting capacity and stability of the tire in sand, improves the passability and safety of the vehicle, and enhances driving comfort.

[0055] In this embodiment, this design is used for the rear tire of the vehicle.

[0056] The application principle of the present invention is as follows: by providing auxiliary pattern blocks 3 on the tire body 1, especially pattern blocks with auxiliary digging parts 32, the tire's grip and passability can be further enhanced, and the vehicle's adaptability in complex terrain can be improved. This design not only improves the vehicle's driving performance, but also extends the tire's service life and reduces maintenance costs.

[0057] Example 3 A sand tire, which is different from Example 1 in that Figure 5 The tire body 1 is connected with a first pattern group 4 and a second pattern group 5, and the first pattern group 4 and the second pattern group 5 are respectively arranged on both sides of the excavation block 2. The first pattern group 4 is provided with multiple groups, and the multiple groups of first pattern groups 4 are arranged at intervals along the circumference of the tire body 1. The second pattern group 5 is provided with multiple groups, and the multiple groups of second pattern groups 5 are arranged at intervals along the circumference of the tire body 1. The first pattern group 4 and the second pattern group 5 are both integrally formed with the tire body 1.

[0058] During the driving process of the tire, the first pattern group 4 and the second pattern group 5 significantly increase the contact area between the tire and the ground, and the curved surface design can better adapt to the sandy terrain, thereby improving the tire's grip and anti-skid performance.

[0059] Reference Figure 5 The first pattern group 4 and the second pattern group 5 are staggered. This can effectively improve the tire's grip and traction performance in the sand, reduce the problem of local pressure concentration caused by pattern group alignment, thereby reducing tire slippage and improving the vehicle's driving stability in the sand environment.

[0060] Reference Figure 5 In this embodiment, the first pattern group 4 and the second pattern group 5 have the same structure, so this embodiment only describes the first pattern group 4 in detail.

[0061] Reference Figure 6 The top surface of the first pattern group 4 is set to have an arc, and its arc is located on the arc surface a. The height of the first pattern group 4 gradually decreases along the advancing direction, and the lowest point of the top surface of the first pattern group 4 is the same as the height of the digging block 2.

[0062] The cambered surface design can effectively disperse the force on the tire and reduce the wear caused by excessive local pressure on the tire. When the tire is driving, the digging block 2 can quickly cut into and push the sand in front, effectively reducing the risk of the tire sinking. The first pattern group 4 and the second pattern group 5 work together with the digging block 2 to improve the suspension force. This not only enhances the overall grip, but also makes the vehicle have better handling stability and acceleration performance when driving, further improving the vehicle's passability and safety in sandy environments.

[0063] Reference Figure 5 and Figure 7 The first pattern group 4 includes a first pattern block 41 and a second pattern block 42. The first pattern block 41 and the second pattern block are arranged at intervals, and both are connected to the tire body 1. The first pattern block 41 is located at the front end of the second pattern block 42 along the forward direction.

[0064] Reference Figure 7 The top of the second tread block 42 is provided with an inclined portion 421, which is inclined toward the shoulder. The inclined portion 421 is provided with an inclined surface 4211, which is provided on a side close to the digging block 2 and is inclined from one end close to the tire body 1 to the other end away from the digging block 2, and the area of ​​the inclined surface 4211 gradually increases from one end close to the first tread block 41 to the other end.

[0065] The first pattern block 41 is located at the front end of the second pattern block 42 along the forward direction, and the inclined portion 421 arranged at the top end of the second pattern block 42 is inclined toward the tire shoulder. The inclined surface 4211 has a guiding property for sand, thereby increasing the sand discharge performance.

[0066] In this embodiment, this design is used for the front tire of the vehicle.

[0067] The application principle of the present invention is as follows: by providing the first pattern group 4 and the second pattern group 5 on the tire body 1, the tire's grip and sand removal performance can be further optimized, and the vehicle's driving performance in sand can be improved. This design not only improves the vehicle's driving safety and comfort, but also extends the tire's service life and reduces maintenance costs.

[0068] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sand tire, characterized by: It comprises a tire body (1), the tire body (1) is connected to a plurality of digging blocks (2), and the plurality of digging blocks (2) are distributed at intervals along the circumference of the tire body (1); The digging block (2) comprises a first digging part (21) and a second digging part (22), wherein a first end of the first digging part (21) is connected to the tire body (1), and the second digging part (22) is connected to a second end of the first digging part (21), and the second digging part (22) is located at the front end of the first digging part (21) along the forward direction, and the first digging part (21), the second digging part (22) and the tire body (1) form a digging space with an opening on one side, so as to dig sand while the vehicle is driving.

2. A sand tire according to claim 1, characterized in that: The excavating block (2) is provided with a first excavating front face (23) and a first excavating back face (24); the first excavating front face (23) is provided with a first arc surface (231) and a second arc surface (232); the first arc surface (231) is located on a side of the second arc surface (232) away from the tire body (1), and the diameter of the second arc surface (232) is greater than the diameter of the first arc surface (231); the first excavating back face (24) is provided with a third arc surface (241), and the diameter of the third arc surface (241) is greater than the diameter of the second arc surface (232).

3. A sand tire according to claim 1, characterized in that: The digging block (2) is located on the tread center line of the tire body (1).

4. A sand tire according to claim 2, characterized in that: The tire body (1) is connected to an auxiliary tread block (3), the auxiliary tread blocks (3) are evenly distributed along the circumference of the tire body (1), the auxiliary tread blocks (3) include a tread portion (31) and an auxiliary digging portion (32), the tread portion (31) is connected to the tire body (1), a plurality of the auxiliary digging portions (32) are provided, the plurality of the auxiliary digging portions (32) are all connected to one end of the tread portion (31) away from the tire body (1), and the auxiliary digging portions (32) are located at the front end of the tread portion (31) along the forward direction, and the auxiliary digging portions (32) can dig sand during the driving of the vehicle.

5. A sand tire according to claim 4, characterized in that: A plurality of auxiliary digging parts (32) are symmetrically arranged about the tread center line.

6. A sand tire according to claim 4, characterized in that: The auxiliary tread block (3) is provided with a second excavation front face (33) and a second excavation back face (34), the second excavation front face (33) includes a fourth arc surface (331) and a fifth arc surface (332), the fourth arc surface (331) is provided on a side of the fifth arc surface (332) away from the tire body (1), and the diameter of the fourth arc surface (331) is greater than the diameter of the fifth arc surface (332), the diameter of the fifth arc surface (332) is greater than the diameter of the second arc surface (232), and the second excavation back face (34) is provided with a sixth arc surface (341), the diameter of the sixth arc surface (341) is greater than the diameter of the third arc surface (241).

7. A sand tire according to any one of claims 1 to 3, characterized in that: The tire body (1) is connected with a first pattern group (4) and a second pattern group (5), the first pattern group (4) and the second pattern group (5) are respectively arranged on both sides of the digging block (2); the first pattern group (4) is provided with a plurality of groups, and the plurality of groups of the first pattern groups (4) are arranged at intervals along the circumference of the tire body (1); the second pattern group (5) is provided with a plurality of groups, and the plurality of groups of the second pattern groups (5) are arranged at intervals along the circumference of the tire body (1); The first pattern group (4) and the second pattern group (5) have the same structure, the top surface of the first pattern group (4) is arranged along the circumferential arc of the tire body (1), and the height of the first pattern group (4) gradually decreases along the forward direction, and the lowest point of the top surface of the first pattern group (4) is the same as the height of the digging block (2).

8. A sand tire according to claim 7, characterized in that: The first pattern group (4) comprises a first pattern block (41) and a second pattern block (42), the first pattern block (41) and the second pattern block (42) are arranged at intervals, and both are connected to the tire body (1), and the first pattern block (41) is located at the front end of the second pattern block (42) along the forward direction; The top end of the second tread block (42) is provided with an inclined portion (421), the inclined portion (421) is inclined towards a direction close to the tread shoulder, the inclined portion (421) is provided with an inclined surface (4211), and the area of ​​the inclined surface (4211) gradually increases from one end close to the first tread block (41) to the other end.

9. A sand tire according to claim 7, characterized in that: The first pattern group (4) and the second pattern group (5) are arranged in a staggered manner.

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