Block tread profile with fractal structure

Abstract

The invention provides a block-shaped tread pattern with a fractal structure, and relates to the technical field of vehicle tire tread patterns, the block-shaped tread pattern comprises a plurality of pattern blocks which are distributed on a tread at intervals along the circumferential direction of a tire, and the pattern blocks are symmetrically arranged by taking the center line of the tread as the center; deep grooves are formed among the pattern blocks; a plurality of fractal pattern grooves are formed in the pattern blocks; fractal pattern grooves formed in the edges of the pattern blocks extend to the deep grooves; the depth of each fractal pattern groove ranges from 1 mm to 1.5 mm. The technical problem that the performance of tread patterns in the prior art is reduced during long-time high-load work due to poor drainage and heat dissipation effects is solved, and the technical effect of improving the water skiing performance and the heat dissipation performance of the tire is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle tire tread patterns, and in particular to a block tread pattern with a fractal structure. Background Art

[0002] During vehicle operation, the tire, as the only component in contact with the ground, plays a crucial role in load-bearing, braking, and ensuring driving safety. When the vehicle is driving on a normal road surface, the actual contact area between the tire and the ground is similar to that between the sole of a shoe and the ground. Under such a limited contact area, the tread pattern on the tire determines the performance of the tire.

[0003] Currently, most heavy-duty trucks use longitudinal tread patterns, that is, a number of tread blocks are arranged circumferentially in the transverse direction on the tire tread, and the fractal tread grooves penetrate transversely; the longitudinal tread pattern performs well in terms of braking force and driving force, and can meet the load requirements of heavy-duty trucks to a certain extent.

[0004] However, when driving on a rainy or waterlogged road surface, the existing tread patterns cannot quickly and effectively drain the water between the tire and the ground. The formation of a water film will cause the "hydroplaning" phenomenon, greatly reducing the tire grip. Moreover, when a heavy-duty truck is driving, compared with ordinary vehicles, the tire bears greater pressure and friction, generating a large amount of heat. If the heat cannot be dissipated in time, the tire temperature will continue to rise. This not only accelerates the aging of the tire rubber and shortens the service life, but may also damage the internal structure of the tire, leading to serious accidents such as tire blowouts.

[0005] Therefore, due to the poor drainage and heat dissipation effects of the tread patterns of heavy-duty truck tires in the prior art, the performance of the tires deteriorates significantly during long-term high-load and high-duty work, and it is difficult to meet the frequent long-distance transportation and heavy-load requirements of heavy-duty trucks. Summary of the Invention

[0006] The purpose of the present invention is to provide a block tread pattern with a fractal structure to alleviate the technical problem that the tread pattern in the prior art deteriorates in performance during long-term high-load and high-duty work due to drainage and heat dissipation.

[0007] To achieve the above purpose, the technical solution of the present invention is as follows: The present invention provides a block tread pattern with a fractal structure, including: A number of tread blocks are distributed at intervals along the circumferential direction of the tire tread, and the tread blocks are symmetrically arranged with the center line of the tread as the center; deep grooves are provided between the tread blocks; A number of fractal tread grooves are opened on the tread blocks; the fractal tread grooves arranged at the edges of the tread blocks extend to the deep grooves; The depth of the fractal tread grooves is 1 mm to 1.5 mm.

[0008] Furthermore, the area ratio of the tread blocks to the tread surface is 70% - 80%. The tread blocks are in a round - head indication shape. There are stepped walls on both sides of the tread blocks, and the ends of the stepped walls extend to the bottom of the deep groove. There is a groove at the center position of the tail of the tread block, and there is a first convex block between the round - head ends of two adjacent tread blocks.

[0009] Furthermore, the depth of the stepped wall is 4 mm - 16 mm, and the included angle α of the stepped wall is 15° - 18°. The included angle α is the angle between the end face of the stepped wall and the central normal of the deep groove; The depth of the groove is 5 mm - 6 mm; the height of the first convex block is 5 mm - 6 mm; The depth of the deep groove is 21 mm - 22 mm, and the included angle β between the deep groove and the central normal is 8° - 10°.

[0010] Furthermore, the fractal tread grooves include first arrow - shaped grooves and second arrow - shaped grooves arranged alternately. The first arrow - shaped grooves have the same indication direction as the tread blocks, and the indication direction of the second arrow - shaped grooves is opposite to that of the first arrow - shaped grooves.

[0011] Furthermore, the longitudinal spacing between two adjacent second arrow - shaped grooves is 2 mm - 3 mm. The tip angle γ of the first arrow - shaped grooves and the second arrow - shaped grooves is 90° - 95°, and the transverse lengths of both the first arrow - shaped grooves and the second arrow - shaped grooves are 15 mm - 16 mm.

[0012] Furthermore, the area ratio of the tread blocks to the tread surface is 60% - 70%. There is a second convex block between two adjacent longitudinal tread blocks; the groove wall of the deep groove is in a zigzag shape.

[0013] Furthermore, the height of the second convex block is 5 mm - 6 mm; The depth of the deep groove is 11 mm - 12 mm. The included angle θ1 between the top end of the deep groove and the central normal is 22° - 23°, and the included angle θ2 between the zigzag part of the deep groove and the central normal is 11° - 12.5°.

[0014] Furthermore, the fractal tread grooves include wave - shaped transverse grooves and arc - shaped transverse grooves. The ends of two relatively arranged wave - shaped transverse grooves are connected, and the arc - shaped transverse grooves are arranged on one side of the wave - shaped transverse grooves.

[0015] Furthermore, the end - to - end spacing of the wave - shaped transverse grooves is 3 mm - 4 mm, and the bending angle of the arc - shaped transverse grooves is 40° - 45°.

[0016] Beneficial effects: The present invention provides a block tread pattern with a fractal structure, including a plurality of tread blocks distributed at intervals along the circumferential direction of the tire, and the tread blocks are symmetrically arranged with the tread center line as the center; deep grooves are provided between the tread blocks; deep grooves are provided between the tread blocks, and the fractal pattern grooves at the edges of the tread blocks extend to the deep grooves, forming a drainage system. When a heavy vehicle travels on a waterlogged road surface, the accumulated water in the contact area between the tire and the ground can quickly flow through the fractal pattern grooves to the deep grooves, preventing the formation of a water film between the tire and the ground, thereby effectively preventing the vehicle from experiencing hydroplaning, ensuring sufficient friction between the tire and the ground, and guaranteeing driving safety.

[0017] A number of fractal pattern grooves are provided on the tread blocks; the fractal pattern grooves provided at the edges of the tread blocks extend to the deep grooves; by setting the fractal structure pattern grooves, a complex and delicate shape is presented. Compared with traditional simple pattern grooves, the fractal pattern grooves increase the contact area between the tire and the outside air; at the same time, the irregular shape and staggered layout of the fractal pattern grooves will disrupt the flow of the surrounding air when the tire rotates. During the driving process of a heavy vehicle, a large amount of heat is generated by the friction between the tire and the ground. The larger contact area and air flow can efficiently transfer the heat to the air, accelerating the heat dissipation process and preventing the problem of performance degradation of the tire due to overheating.

[0018] The depth of the fractal pattern grooves is 1 mm to 1.5 mm. The depth of the fractal pattern grooves ensures that the pattern grooves have sufficient space to accommodate the accumulated water without affecting the structural strength of the tire due to being too deep. Brief Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of a block tread pattern with a fractal structure provided by an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a tread block in a block tread pattern with a fractal structure provided by an embodiment of the present invention; Figure 3 It is a schematic structural diagram of a stepped wall in a block tread pattern with a fractal structure provided by an embodiment of the present invention; Figure 4 It is a schematic structural diagram of a first convex block in a block tread pattern with a fractal structure provided by an embodiment of the present invention; Figure 5Schematic diagram of the groove in the block tread pattern with a fractal structure provided by an embodiment of the present invention; Figure 6 Schematic diagram of the deep groove in the block tread pattern with a fractal structure provided by an embodiment of the present invention; Figure 7 Schematic diagram of another block tread pattern with a fractal structure provided by an embodiment of the present invention; Figure 8 Schematic diagram of the tread block in another block tread pattern with a fractal structure provided by an embodiment of the present invention; Figure 9 Schematic diagram of the deep groove in another block tread pattern with a fractal structure provided by an embodiment of the present invention.

[0021] Icon: 1 - Tread block; 2 - Deep groove; 3 - Fractal pattern groove; 101 - Step wall; 102 - Groove; 103 - First convex block; 301 - First arrow groove; 302 - Second arrow groove; 104 - Second convex block; 303 - Wave cross groove; 304 - Arc cross groove. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0024] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0026] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0027] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0029] Embodiment 1 The present invention provides a block tread pattern having a fractal structure, including: A plurality of tread blocks 1 are distributed at intervals along the circumferential direction of the tire, and the tread blocks 1 are symmetrically arranged with the tread center line as the center; deep grooves 2 are provided between the tread blocks 1; A plurality of fractal pattern grooves 3 are formed on the tread blocks 1; the fractal pattern grooves 3 provided at the edges of the tread blocks 1 extend to the deep grooves 2; The depth of the fractal pattern grooves 3 is 1 mm to 1.5 mm.

[0030] Specifically, as Figure 1As shown in the figure, several tread blocks 1 are distributed at intervals along the circumferential direction of the tire of the present invention, that is, they are arranged around the tread of the tire; the tread blocks 1 on the tread are symmetrically arranged with the tread center line as the center, that is, the shapes and sizes of the tread blocks 1 on the left and right sides are the same. The symmetrical layout ensures the balanced force of the tire in all directions, thus improving the driving stability. During the vehicle driving process, the pressure and friction force borne by the tire can be evenly dispersed to each tread block 1, avoiding local excessive wear.

[0031] There are intervals between two adjacent tread blocks 1 longitudinally and transversely, that is, deep grooves 2. In terms of drainage performance, when the vehicle is driving on a waterlogged road surface, the deep grooves 2 can quickly drain the water between the tire and the ground, preventing the vehicle from hydroplaning due to the formation of a water film caused by the accumulated water, ensuring good adhesion between the tire and the ground, and guaranteeing driving safety. From the perspective of heat dissipation, the deep grooves 2 increase the contact area between the tire and the air, which is beneficial to quickly dissipating the heat generated by friction into the air during the operation of the tire, reducing the temperature of the tire, and improving the durability and reliability of the tire.

[0032] On the tread block 1, several fractal pattern grooves 3 are opened. The fractal pattern grooves 3 are formed by a fractal structure and have complexity. Compared with the traditional tire transverse grooves, their shapes and layouts can provide more air flow channels. The fractal pattern grooves 3 further increase the surface area of the tire, not only strengthening the drainage ability, enabling the accumulated water to converge into the deep grooves 2 faster through these fine fractal patterns 3 and be discharged, but also greatly improving the heat dissipation effect. Due to the increase in the surface area, the heat exchange between the tire and the air is more sufficient, and the heat can be dissipated more effectively. At the same time, the fractal pattern grooves 3 arranged at the edge of the tread block 1 extend to the deep grooves 2, forming a drainage network. The accumulated water can smoothly flow from the fractal pattern grooves 3 into the deep grooves 2 and then be discharged from the contact area between the tire and the ground.

[0033] The depth of the fractal pattern grooves 3 is all 1 mm to 1.5 mm. This ensures that the fractal pattern grooves 3 have enough space to accommodate the accumulated water to cope with waterlogged road surfaces of different degrees, and will not affect the structural strength of the tread block 1 due to excessive depth, ensuring that the tire can still maintain its performance when bearing the vehicle weight and various acting forces during driving.

[0034] Embodiment 2 In Embodiment 2 of the present invention, the area ratio of the tread block 1 to the tread is 70% - 80%. The tread block 1 is in a round-head indication shape. There are stepped walls 101 on both sides of the tread block 1, and the ends of the stepped walls 101 extend to the bottom of the deep groove 2. There is a groove 102 at the center position of the tail of the tread block 1. There is a first convex block 103 between the round-head ends of two adjacent tread blocks 1.

[0035] The depth of the stepped wall 101 is 14 mm to 16 mm, and the included angle α of the stepped wall 101 is 15° to 18°. The included angle α is the included angle between the end face of the stepped wall 101 and the central normal of the deep groove 2; The depth of the groove 102 is 5 mm to 6 mm; the height of the first bump 103 is 5 mm to 6 mm; The depth of the deep groove 2 is 21 mm to 22 mm, and the included angle β between the deep groove 2 and the central normal is 8° to 10°.

[0036] Specifically, as Figure 1 、 Figure 2 shown, the tread block 1 occupies 70% to 80% of the tread area. The relatively high proportion enables the tire to have a larger effective support area when in contact with the ground, thereby enhancing the load-bearing capacity of the tire and meeting the higher requirements for the load-bearing performance of the tire for heavy-duty vehicles.

[0037] As Figure 3 shown, on the left and right sides of the tread block 1, there are stepped walls 101. The ends of the stepped walls 101 extend to the deep groove 2. The stepped wall 101 is divided into two sections of steps, with the depth of each section being 7 mm to 8 mm and the total depth being between 14 mm and 16 mm. When the tire is running on a waterlogged road surface, the accumulated water can flow into the deep groove 2 along the surface of the stepped wall 101, accelerating the drainage process. Its included angle α is between 15° and 18°. This included angle α is the included angle between the end face of the stepped wall 101 and the central normal of the deep groove 2, enabling the accumulated water to flow more efficiently into the deep groove 2. At the same time, it also reasonably adjusts the force distribution on the side of the tire, enhancing the durability of the tire under complex road conditions.

[0038] As Figure 5 shown, at the center position of the tail of the surface of the tread block 1, there is a groove 102 extending to the tire sidewall. The depth of the groove 102 is 5 mm to 6 mm. It can not only further increase the drainage capacity of the tire, allowing the accumulated water to quickly drain from the central part of the tread block 1, but also relieve the stress concentration problem caused by the force at the tail during the rolling process of the tire to a certain extent, improving the overall strength and service life of the tread block 1.

[0039] As Figure 4 shown, between the round head ends of two adjacent tread blocks 1, there is a first bump 103. The height of the first bump 103 is 5 mm to 6 mm. The first bump 103 plays a role in enhancing the connection stability between the tread blocks 1 during the running of the tire, reducing the damage or deformation of the tread blocks 1 caused by uneven force.

[0040] As Figure 6As shown, the deep groove 2 in this embodiment has a depth of 21 mm to 22 mm, ensuring that in the case of a large amount of accumulated water, the deep groove 2 can prevent the accumulated water from accumulating between the tire and the ground, effectively avoiding the occurrence of hydroplaning. The included angle β between the deep groove 2 and the central normal is 8° to 10°, and this angle improves the flow direction of the accumulated water in the deep groove 2, enabling the accumulated water to be discharged more quickly from the side of the tire, further enhancing the drainage performance of the tire and ensuring the safety of the vehicle when driving on a wet road surface.

[0041] In an embodiment of the present invention, the fractal pattern groove 3 includes a first arrow groove 301 and a second arrow groove 302 arranged in an interleaved manner. The first arrow groove 301 has the same indicating direction as the tread block 1, and the indicating direction of the second arrow groove 302 is opposite to that of the first arrow groove 301.

[0042] The longitudinal distance between two adjacent second arrow grooves 302 is 2 mm to 3 mm. The tip angle γ of the first arrow groove 301 and the second arrow groove 302 is 90° to 95°, and the transverse lengths of both the first arrow groove 301 and the second arrow groove 302 are 15 mm to 16 mm.

[0043] Specifically, as Figure 2 shown, the fractal pattern groove 3 includes an interleaved arrangement of the first arrow groove 301 and the second arrow groove 302, that is, one row of the first arrow groove 301 and one row of the second arrow groove 302. Utilizing the complexity of the fractal structure of multiple arrow shapes provides more air flow channels, helping the tire to dissipate heat better under high-speed driving or load conditions and reducing the performance degradation caused by overheating.

[0044] When the vehicle is driving on a waterlogged road surface, the first arrow groove 301 that is in the same indicating direction as the tread block 1 can quickly guide the accumulated water to flow along its direction. The second arrow groove 302 with the opposite indicating direction collects the accumulated water from the opposite direction, allowing the accumulated water to cross and accelerate between the two arrow grooves and finally be quickly discharged from the tire. The longitudinal distance between two adjacent second arrow grooves 302 is controlled within 2 mm to 3 mm, enabling the water flow to flow quickly in the narrow gap, further improving the drainage efficiency and ensuring the safety of the vehicle when driving on a wet road surface.

[0045] The tip angle γ of the first arrow groove 301 and the second arrow groove 302 is 90° to 95°, and the transverse lengths of both the first arrow groove 301 and the second arrow groove 302 are 15 mm to 16 mm, increasing the contact area between the tire and the air. When the tire rotates at high speed, a large amount of air can come into contact with the inner surface of the arrow groove more fully, accelerating the heat transfer speed and quickly dissipating the large amount of heat generated by the friction between the tire and the ground into the air.

[0046] The fractal structure of the repetitive similarity complexity of the first arrow groove 301 and the second arrow groove 302 in the fractal pattern groove 3 improves the drainage, grip and heat dissipation performance, enhancing the comprehensive performance of the truck tire under various road conditions.

[0047] Example 3 In Example 3 of the present invention, the area ratio of the tread block 1 to the tread surface is 60% - 70%, and a second convex block 104 is provided between two adjacent longitudinal tread blocks 1; the groove wall of the deep groove 2 is in a broken line shape.

[0048] The height of the second convex block 104 is 5 mm - 6 mm; The depth of the deep groove 2 is 11 mm - 12 mm, the angle θ1 between the top of the deep groove 2 and the central normal is 22° - 23°, and the angle θ2 between the broken line of the deep groove 2 and the central normal is 11° - 12.5°.

[0049] Specifically, as Figure 7 、 Figure 8 and Figure 9 shown, the area ratio of the tread block 1 to the tread surface is 60% - 70%. This ratio ensures a certain grip while reserving sufficient space for the deep groove 2 for drainage and heat dissipation. A second convex block 104 with a height of 5 mm - 6 mm is provided between two adjacent longitudinal tread blocks 1. The second convex block 104 not only enhances the connection stability between the tread blocks 1, but also helps the tread blocks 1 better disperse the forces from the road surface during vehicle driving, effectively reducing the damage to the tread blocks 1 caused by excessive local stress and extending the overall service life of the tire.

[0050] In the present invention, the broken line of the deep groove 2 can significantly increase the stone trapping prevention rate. When the vehicle is driving on complex road conditions, especially when the road surface is covered with stones, ordinary straight-wall deep grooves are prone to stone embedding. However, the broken-line groove wall of the deep groove 2 can change the movement trajectory of the stones when they enter the deep groove. When the stones contact the broken line, due to the angle change, it is difficult for them to stay stably in the deep groove, and most of them will be thrown out of the deep groove during the rolling of the tire. The depth of the deep groove 2 is 11 mm - 12 mm, the angle θ1 between the top and the central normal is 22° - 23°, and the angle θ2 between the broken line and the central normal is 11° - 12.5°. The combination of the angles and the broken-line shape makes it impossible for the stones to easily find a position to embed and stay stably after entering the deep groove. Compared with traditional straight-wall deep grooves, the broken-line deep groove greatly reduces the probability of stone embedding, effectively increasing the stone trapping prevention rate. This not only reduces the wear of the tire caused by stone embedding, but also avoids potential safety hazards caused by the rolling and friction of the stones in the deep groove, ensuring that the tire can continuously and stably perform under various road conditions.

[0051] The fractal pattern groove 3 includes wave-shaped transverse grooves 303 and arc-shaped transverse grooves 304. The ends of two relatively arranged wave-shaped transverse grooves 303 are connected, and the arc-shaped transverse grooves 304 are arranged on one side of the wave-shaped transverse grooves 303.

[0052] The end spacing of the wave-shaped transverse grooves 303 is 3 mm to 4 mm, and the bending angle of the arc-shaped transverse grooves 304 is 40° to 45°.

[0053] Specifically, as Figure 7 shown, the fractal pattern groove 3 adopts a repetitive and similar fractal structure composed of wave-shaped transverse grooves 303 and arc-shaped transverse grooves 304.

[0054] Two relatively arranged wave-shaped transverse grooves 303 with connected ends form a water flow guiding path. When the tire travels on a waterlogged road surface, the accumulated water flows into the wave-shaped transverse grooves 303, and the connected end design enables the accumulated water to flow between different areas of the wave-shaped transverse grooves 303, accelerating the diffusion and discharge of the accumulated water. The end spacing, that is, the longitudinal difference at the end of one wave-shaped transverse groove 303, is maintained at 3 mm to 4 mm. This spacing can effectively prevent debris blockage and ensure the rapid flow of the accumulated water in a limited space, avoiding the accumulation of the accumulated water between the tire and the ground, thereby reducing the risk of hydroplaning and improving the safety of the vehicle when driving on a wet road surface.

[0055] The arc-shaped transverse grooves 304 cooperating with the wave-shaped transverse grooves 303 are arranged on one side of the wave-shaped transverse grooves 303. Their bending angle of 40° to 45° enables the edge of the pattern groove to fit the micro-undulations of the road surface when the tire contacts the ground.

[0056] The fractal combination of the wave-shaped transverse grooves 303 and the arc-shaped transverse grooves 304 similar to ocean waves, while ensuring strength, increases the contact area between the tire and the air. When the tire rotates at high speed, the air can more fully contact the surface of the fractal pattern groove 3, accelerating heat transfer. A large amount of heat generated by the friction between the tire and the ground can be quickly dissipated into the air, effectively preventing the performance degradation of the tire due to overheating, extending the service life of the tire, and ensuring that the tire always maintains a good performance state during long-term use.

[0057] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A block tread pattern with a fractal structure, characterized in that, Including: A plurality of tread blocks (1) are circumferentially spaced along the tread of the tire, and the tread blocks (1) are symmetrically arranged with the tread center line as the center; deep grooves (2) are provided between the tread blocks (1); A plurality of fractal tread grooves (3) are formed in the tread blocks (1); the fractal tread grooves (3) provided at the edges of the tread blocks (1) extend to the deep grooves (2); The depth of the fractal tread grooves (3) is 1 mm to 1.5 mm.

2. The block tread pattern with a fractal structure according to claim 1, characterized in that The area ratio of the tread blocks (1) to the tread is 70% to 80%, the tread blocks (1) are in a round head indication shape, stepped walls (101) are provided on both sides of the tread blocks (1), the ends of the stepped walls (101) extend to the bottom of the deep grooves (2), a groove (102) is provided at the center position of the tail of the tread blocks (1), and a first convex block (103) is provided between the round head ends of two adjacent tread blocks (1).

3. The block tread pattern with a fractal structure according to claim 2, characterized in that The depth of the stepped walls (101) is 14 mm to 16 mm, the included angle α of the stepped walls (101) is 15° to 18°, and the included angle α is the included angle between the end face of the stepped walls (101) and the central normal of the deep grooves (2); The depth of the groove (102) is 5 mm to 6 mm; the height of the first convex block (103) is 5 mm to 6 mm; The depth of the deep grooves (2) is 21 mm to 22 mm, and the included angle β between the deep grooves (2) and the central normal is 8° to 10°.

4. The block tread pattern with a fractal structure according to claim 3, characterized in that The fractal tread grooves (3) include first arrow grooves (301) and second arrow grooves (302) arranged in an alternating manner, the first arrow grooves (301) have the same indication direction as the tread blocks (1), and the indication direction of the second arrow grooves (302) is opposite to that of the first arrow grooves (301).

5. The block tread pattern with a fractal structure according to claim 4, characterized in that The longitudinal distance between two adjacent second arrow grooves (302) is 2 mm to 3 mm, the tip angle γ of the first arrow grooves (301) and the second arrow grooves (302) is 90° to 95°, and the transverse lengths of the first arrow grooves (301) and the second arrow grooves (302) are both 15 mm to 16 mm.

6. The block tread pattern with a fractal structure according to claim 1, characterized in that The area ratio of the tread blocks (1) to the tread is 60% to 70%, and a second convex block (104) is provided between two adjacent longitudinal tread blocks (1); The groove walls of the deep grooves (2) are in a polygonal shape.

7. The block tread pattern with a fractal structure according to claim 6, characterized in that The height of the second convex block (104) is 5 mm to 6 mm; The depth of the deep groove (2) is 11 mm to 12 mm, the angle θ1 between the top end of the deep groove (2) and the central normal line is 22° to 23°, and the angle θ2 between the fold line of the deep groove (2) and the central normal line is 11° to 12.5°.

8. The block tread pattern with a fractal structure according to claim 7, characterized in that the fractal pattern groove (3) includes a wave cross groove (303) and an arc cross groove (304), the ends of two oppositely arranged wave cross grooves (303) are connected, and the arc cross groove (304) is arranged on one side of the wave cross groove (303).

9. The block tread pattern with a fractal structure according to claim 8, characterized in that the end spacing of the wave cross groove (303) is 3 mm to 4 mm, and the bending angle of the arc cross groove (304) is 40° to 45°.

Images