Tread tread with curved fractal structure

Abstract

The invention provides a tread pattern with a curve type fractal structure, and relates to the technical field of vehicle tire tread pattern structures, four longitudinal grooves formed in the circumferential direction of a tire divide a tread into a tire shoulder pattern block, an inner side pattern block and a middle pattern block; the middle pattern block is the center line of the tire, and the four longitudinal grooves are symmetrical about the center line of the middle pattern block; the two tire shoulder pattern blocks are provided with first curve fractal grooves which are symmetrical about the center of the middle pattern block and extend to the tire side wall and the groove bottom of the longitudinal groove; second curve fractal grooves which are symmetrical about the center of the middle pattern block are formed in the two inner side pattern blocks and extend to the groove bottoms of the longitudinal grooves in the two sides respectively; third curve fractal grooves are symmetrically formed in the middle pattern block with respect to the center line and extend to the groove bottoms of the longitudinal grooves on the two sides. The technical problem that the tire temperature continuously rises due to limited air flowing channels and insufficient heat dissipation capacity is solved, and the technical effect of better heat dissipation under the high-speed driving or load condition is achieved.

Description

Technical Field

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

[0002] As the only direct contact component between a vehicle and the ground, the performance of a tire directly affects the safety, handling, and driving experience of the vehicle. With the rapid development of the automotive industry, the driving speed of vehicles has been continuously increasing, and the driving conditions have become increasingly complex and diverse.

[0003] Currently, most existing tire tread patterns adopt basic geometric shapes such as traditional straight lines and simple arcs. Although they can meet the basic driving requirements and play a certain role under ordinary road conditions, their drawbacks gradually become prominent under harsh conditions such as high-speed driving and long-term high-load operation. When a vehicle is driving at high speed, the intense friction between the tire and the ground and the high-speed flow of air will generate a large amount of heat. For tires with traditional simple patterns, the air flow channels are limited, and the heat dissipation capacity is insufficient, resulting in a continuous increase in the tire temperature. High temperature not only accelerates the aging and wear of the tire rubber but also causes a decline in the internal structural performance of the tire, thereby reducing the tire's grip and handling stability and seriously affecting driving safety.

[0004] The fractal structure has unique self-similarity and infinite complexity. Compared with traditional patterns, it can construct more air flow channels on the tire surface. There is a lack of a tire tread pattern in the prior art that utilizes the fractal structure to promote the air circulation on the tire surface and inside and reduce the performance degradation caused by overheating. Summary of the Invention

[0005] The purpose of the present invention is to provide a tread pattern with a curved fractal structure to alleviate the technical problems existing in the prior art, where the tire tread pattern adopts basic straight lines or geometric shapes, the air flow channels are limited, the heat dissipation capacity is insufficient, and the tire temperature continues to rise.

[0006] To achieve the above purpose, the technical solution of the present invention is as follows: The present invention provides a tread pattern with a curved fractal structure, including: Four longitudinal grooves opened along the circumferential direction of the tire, which divide the tread into shoulder tread blocks, inner tread blocks, and middle tread blocks; The middle tread block is the center line of the tire, and the four longitudinal grooves are symmetric with respect to the center line of the middle tread block; First curved fractal grooves symmetrically centered on the center of the middle tread block are opened on the two shoulder tread blocks, and the first curved fractal grooves extend to the sidewall of the tire and the bottom of the longitudinal grooves; Two inner tread blocks are provided with second curve fractal grooves that are symmetric about the center of the middle tread block, and the second curve fractal grooves respectively extend to the bottoms of the longitudinal grooves on both sides; The middle tread block is symmetrically provided with third curve fractal grooves about the center line, and the third curve fractal grooves extend to the bottoms of the longitudinal grooves on both sides.

[0007] Further, the longitudinal groove includes a first groove wall and a second groove wall, and both the first groove wall and the second groove wall are in a broken line shape; the first groove wall angle α formed by the first groove wall and the tread surface is 18° - 23°, the second groove wall angle β is 10° - 15°, the third groove wall angle γ formed by the second groove wall and the tread surface is 10° - 15°, and the fourth groove wall angle θ is 18° - 23°; The width of the longitudinal groove is 11 mm - 15 mm, and the depth of the longitudinal groove is 13 mm - 20 mm; The bottom of the longitudinal groove is in a semi-circular shape, and the diameter of the semi-circular shape at the bottom of the longitudinal groove is 3 - 8 mm.

[0008] Further, the first curve fractal groove includes two wave-shaped transverse grooves that respectively extend to the tire side and the longitudinal groove, the ends of the two wave-shaped transverse grooves are connected, and the first curve fractal groove further includes an independent first arc-shaped transverse groove; The widths of the wave-shaped transverse groove and the first arc-shaped transverse groove are both 1 mm - 2 mm; the end spacing of the two wave-shaped transverse grooves is 3 mm - 4 mm, and the bending angle of the first arc-shaped transverse groove is 40° - 45°.

[0009] Further, the second curve fractal groove includes a first wave-peak transverse groove extending from one side to the longitudinal groove and a second wave-peak transverse groove extending to the longitudinal groove on the other side; the second curve fractal groove further includes an independent second arc-shaped transverse groove; The widths of the first wave-peak transverse groove, the second wave-peak transverse groove, and the second arc-shaped transverse groove are all 1 mm - 2 mm; the end spacing of the first wave-peak transverse groove is 6 mm - 7 mm, the end spacing of the second wave-peak transverse groove is 1.5 mm - 2 mm, and the bending angle of the second wave-peak transverse groove is 40° - 45°.

[0010] Further, the third curve fractal groove includes a wave-shaped transverse groove symmetric about the center line and a third arc-shaped transverse groove distributed on the curved surface of the wave-shaped transverse groove, and the wave front of the wave-shaped transverse groove extends to the longitudinal groove; The widths of the wave-shaped transverse groove and the third arc-shaped transverse groove are both 1 mm - 2 mm.

[0011] Further, the first curve fractal groove includes a first canyon line transverse groove, seven gentle slope line transverse grooves extending to the tire side, and a flat valley line transverse groove; the first canyon line transverse groove extends to the longitudinal groove; The middle width of the first canyon line transverse groove near the longitudinal groove side is 11 mm - 13 mm; the included angle between the gentle slope line transverse groove and the horizontal line perpendicular to the tire side increases from 53° to 80°.

[0012] Furthermore, the second curve fractal groove includes a peak line transverse groove, and the outer periphery of the peak line transverse groove is surrounded by a gully line transverse groove, a second canyon line transverse groove, and a platform line transverse groove; the gully line transverse groove extends to the bottom of one longitudinal groove, the second canyon line transverse groove extends to the bottom of the other longitudinal groove, and the platform line transverse groove extends to the bottoms of both longitudinal grooves.

[0013] Furthermore, the third curve fractal groove includes two third canyon line transverse grooves that are centrosymmetric.

[0014] Furthermore, the widths of the first curve fractal groove, the second curve fractal groove, and the third curve fractal groove are all 1 mm to 1.5 mm.

[0015] Beneficial effects: The present invention provides a tread pattern with a curve fractal structure, including: four longitudinal grooves opened along the circumferential direction of the tire, and the four longitudinal grooves divide the tread into shoulder tread blocks, inner tread blocks, and middle tread blocks; the middle tread block is the center line of the tire, and the four longitudinal grooves are symmetric about the center line of the middle tread block; the four longitudinally opened longitudinal grooves can quickly and effectively drain the water between the tire and the ground on rainy days or in waterlogged roads, reducing the occurrence probability of hydroplaning.

[0016] The two shoulder tread blocks are provided with first curve fractal grooves that are centrosymmetric about the center of the middle tread block, and the first curve fractal grooves extend to the sidewall and the bottoms of the longitudinal grooves; the two inner tread blocks are provided with second curve fractal grooves that are centrosymmetric about the center of the middle tread block, and the second curve fractal grooves respectively extend to the bottoms of the two longitudinal grooves; the middle tread block is symmetrically provided with third curve fractal grooves about the center line, and the third curve fractal grooves extend to the bottoms of the two longitudinal grooves.

[0017] By respectively opening the first curve fractal groove, the second curve fractal groove, and the third curve fractal groove on the shoulder tread block, the inner tread block, and the middle tread block, the contact area between the tire and the air is greatly widened. During the use of the tire, a large amount of heat will be generated by friction, and the larger air contact area can make the heat dissipate to the surrounding air faster. The fractal grooves effectively reduce the degradation of tire performance caused by overheating. At the same time, the stable tire temperature helps to maintain the tire's grip and handling performance, ensuring driving safety.

[0018] The curve fractal grooves optimize the stress distribution of the tire. When the tire is subjected to various forces, these grooves can disperse the stress, avoiding stress concentration in certain specific parts, making the tire more stable during driving, and further improving the overall durability of the tire.

[0019] The fractal pattern not only gives the tire performance but also can be used as a unique visual identifier for the brand, strengthening the brand recognition. Description of the drawings

[0020] 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 drawings in the following description 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.

[0021] Figure 1 Structural schematic diagram of a tread pattern with a curved fractal structure provided by an embodiment of the present invention; Figure 2 Structural schematic diagram of the left longitudinal groove in the tread pattern with a curved fractal structure provided by an embodiment of the present invention; Figure 3 Structural schematic diagram of the right longitudinal groove in the tread pattern with a curved fractal structure provided by an embodiment of the present invention; Figure 4 Another structural schematic diagram of a tread pattern with a curved fractal structure provided by an embodiment of the present invention.

[0022] Icon: 1 - longitudinal groove; 2 - shoulder tread block; 3 - inner tread block; 4 - intermediate tread block; 5 - first curved fractal groove; 6 - second curved fractal groove; 7 - third curved fractal groove; 101 - first groove wall; 102 - second groove wall; 501 - wave transverse groove; 502 - first arc transverse groove; 601 - first wave peak transverse groove; 602 - second wave peak transverse groove; 603 - second arc transverse groove; 701 - wave tide transverse groove; 702 - third arc transverse groove; 503 - first canyon line transverse groove; 504 - gentle slope line transverse groove; 505 - flat valley line transverse groove; 604 - mountain top line transverse groove; 605 - gully line transverse groove; 606 - platform line transverse groove; 607 - second canyon line transverse groove; 703 - third canyon line transverse groove. Specific embodiments

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention 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.

[0024] Accordingly, 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 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 in the present invention without creative efforts fall within the scope of protection of the present invention.

[0025] It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0026] 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, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0027] 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.

[0028] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", "coupled" 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 elements. 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.

[0029] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0030] Embodiment 1 The present invention provides a tread pattern having a curved fractal structure, including: Four longitudinal grooves 1 opened along the circumferential direction of the tire, and the four longitudinal grooves 1 divide the tread into shoulder tread blocks 2, inner tread blocks 3 and intermediate tread blocks 4; The middle tread block 4 is the center line of the tire, and the four longitudinal grooves 1 are symmetric with respect to the center line of the middle tread block 4; On the two shoulder tread blocks 2, first curve fractal grooves 5 that are symmetric with respect to the center of the middle tread block 4 are provided, and the first curve fractal grooves 5 extend to the sidewall and the bottom of the longitudinal groove 1; On the two inner tread blocks 3, second curve fractal grooves 6 that are symmetric with respect to the center of the middle tread block 4 are provided, and the second curve fractal grooves 6 respectively extend to the bottoms of the two side longitudinal grooves 1; The middle tread block 4 is symmetrically provided with third curve fractal grooves 7 with respect to the center line, and the third curve fractal grooves 7 extend to the bottoms of the two side longitudinal grooves 1.

[0031] Specifically, as Figure 1 shown, the four longitudinal grooves 1 opened along the circumferential direction of the tire, and the four longitudinal grooves 1 undertake important functions of drainage and heat dissipation. The four longitudinal grooves 1 divide the tread into different regions, namely two shoulder tread blocks 2, two inner tread blocks 3 and a middle tread block 4. Among them, the middle tread block 4 is located at the center line position of the tire, and the four longitudinal grooves 1 are symmetrically distributed with the center line of the middle tread block 4 as the axis of symmetry. The symmetric structure ensures the uniform force of the tire during driving and effectively improves the straight-line driving stability of the tire.

[0032] On the two shoulder tread blocks 2, first curve fractal grooves 5 that are symmetric with respect to the center of the middle tread block 4 are provided. The curved grooves not only communicate with the sidewall but also extend to the bottom of the longitudinal groove 1. The other side extends to the sidewall, which can enhance the lateral support force of the tire when turning, make the tire better fit the road surface, and reduce the risk of side slip; communicating with the longitudinal groove 1 greatly improves the drainage ability. When driving on a wet road surface, it can quickly drain the accumulated water between the tire and the ground, effectively reducing the occurrence probability of hydroplaning, thereby improving the handling safety of the tire in a wet environment.

[0033] On the two inner tread blocks 3, second curve fractal grooves 6 that are symmetric with respect to the center of the middle tread block 4 are also provided, and the second curve fractal grooves 6 respectively extend to the bottoms of the two side longitudinal grooves 1. It increases the drainage path of the tire, enables the accumulated water to be discharged more efficiently from the inside, and at the same time optimizes the ground contact pressure distribution of the tire, improves the wear resistance of the tire, and extends the service life of the tire.

[0034] The middle tread block 4 is symmetrically provided with third curve fractal grooves 7 with respect to the center line, which respectively extend to the two side longitudinal grooves 1. During the driving of the vehicle, it can better disperse stress, reduce the deformation of the tread block, improve the handling response speed of the tire, and enable the driver to control the vehicle more precisely.

[0035] The first curve fractal groove 5, the second curve fractal groove 6, and the third curve fractal groove 7. These curve-shaped fractal grooves have complexity, and compared with traditional tire tread grooves, their shape and layout can provide more air flow channels. When the vehicle is traveling at high speed, air can flow rapidly in these intricate grooves, forming an efficient convective heat dissipation mechanism. Under load conditions, the tire generates more heat due to the large pressure it bears. At this time, the air channels of the fractal pattern can quickly transfer the heat out, effectively reducing the decline in tire performance caused by overheating.

[0036] When traveling at high speed, the tire rubs against the ground frequently, and the generated heat increases sharply. The complex channels of the fractal pattern can guide a large amount of air into the tire interior, quickly taking away the heat and preventing problems such as rubber aging, increased wear, and decreased grip caused by overheating of the tire. Under heavy load conditions, the heat generated by the tire deformation can also be quickly dissipated through these channels, maintaining the good performance of the tire and ensuring the driving safety of the vehicle.

[0037] The longitudinal groove 1 includes a first groove wall 101 and a second groove wall 102, and both the first groove wall 101 and the second groove wall 102 are in a broken line shape; the first groove wall angle α formed by the first groove wall 101 and the tread is 18° - 23°, the second groove wall angle β is 10° - 15°, the third groove wall angle γ formed by the second groove wall 102 and the tread is 10° - 15°, and the fourth groove wall angle θ is 18° - 23°; The width of the longitudinal groove is 11mm - 15mm, and the depth of the longitudinal groove is 13mm - 20mm; the bottom of the longitudinal groove is in a semi-circular shape, and the diameter of the semi-circular shape at the bottom of the longitudinal groove is 3 - 8mm.

[0038] Specifically, as Figure 2 、 Figure 3 shown, the four longitudinal grooves 1 are symmetrically distributed in pairs with the center line of the middle tread block 4 as the axis of symmetry, that is, the groove wall angles of the two longitudinal grooves 1 on the left and the two longitudinal grooves 1 on the right are exchanged, as Figure 2 and Figure 3As shown, two longitudinal grooves on the left and right sides are respectively shown. The longitudinal groove 1 includes a first groove wall 101 and a second groove wall 102 in a broken line shape. The height from the broken line to the tread is 3 mm to 6 mm. The first groove wall angle α formed by the first groove wall 101 and the tread is 18° to 23°. The second groove wall angle β, which is the included angle at the broken line, is 10° to 15°. The third groove wall angle γ formed by the second groove wall 102 and the tread is 10° to 15°. The fourth groove wall angle θ is also the included angle at the broken line, and the angle is 18° to 23°. During the wear process of the tire, abnormal wear is very likely to occur. Once wear starts at a certain position, the wear area will continuously expand outward along that position. The longitudinal grooves with different angles can effectively relieve the same position of the repeated wear pattern blocks of the tire, enabling the tire to achieve uniform wear, thus greatly extending the service life of the tire and effectively alleviating the problem of abnormal tire wear.

[0039] Although the angles of the groove walls are exchanged, the width of the longitudinal groove is 13 mm to 15 mm. The width ensures the drainage performance of the longitudinal groove. The groove depth of the longitudinal groove 1 is 13 mm to 20 mm, and its bottom is a narrow groove in a semi-circular shape, and the diameter of the semi-circle is 3 to 8 mm. It can effectively prevent stones from getting stuck in the groove, greatly improving the anti-stone-clamping rate of the tire. When the vehicle is driving on a road surface with relatively complex conditions, reducing the stones getting stuck in the groove can not only avoid damage to the tire, but also reduce the noise generated by the friction of the stones, improving the comfort of vehicle driving.

[0040] Embodiment 2 In Embodiment 2 of the present invention, the size and shape of the longitudinal groove 1 are the same as those in Embodiment 1, while the first curve fractal groove 5, the second curve fractal groove 6, and the third curve fractal groove 7 are as Figure 1 shown.

[0041] The first curve fractal groove 5 includes two wave-shaped transverse grooves 501 extending to the tire side and the longitudinal groove 1 and connected at the ends, and an independent first arc-shaped transverse groove 502. The widths of the wave-shaped transverse grooves 501 and the first arc-shaped transverse groove 502, that is, the transverse widths of the grooves, are both 1 mm to 2 mm. The distance between the ends of the two wave-shaped transverse grooves 501, that is, the distance between the adjacent two wave-shaped transverse grooves 501 close to the longitudinal groove 1 side after fractal, is 3 mm to 4 mm. The bending angle of the first arc-shaped transverse groove 502 is 40° to 45°. The first curve fractal groove 5 constructs a local air circulation channel on the tire surface. When the vehicle is driving, air can flow in the channel formed by the wave-shaped transverse grooves 501 and the first arc-shaped transverse groove 502, increasing the air circulation volume in the area and taking away the heat generated by the contact between the tire and the ground and inside. At the same time, the surface area of the tire edge near the tire side is increased. Based on heat transfer, the larger surface area enables the heat to be transferred to the air more efficiently. Therefore, it can effectively prevent uneven wear caused by local frictional overheating in this area and achieve a good tire heat dissipation effect.

[0042] The second-curve fractal grooves 6 respectively extend to the first peak transverse groove 601 and the second peak transverse groove 602 of the longitudinal grooves 1 on both sides. The so-called "respectively extend" means that the first peak transverse groove 601 and the second peak transverse groove 602 are not connected to each other, but respectively extend to the bottom of the longitudinal grooves 1 on both sides. There is also an independent second arc transverse groove 603. The widths of all three, that is, the transverse lengths of the transverse grooves, are 1 mm to 2 mm. The distance between the ends of the first peak transverse groove 601, that is, the distance on the side close to the longitudinal groove 1, is 6 mm to 7 mm. The distance from the end of the second peak transverse groove 602, that is, the distance on the side close to the longitudinal groove 1, is 1.5 mm to 2 mm. The bending angle of the second peak transverse groove 602 is 40° to 45°. Different end distances cause changes in the flow velocity and flow direction of air in the transverse grooves, forming turbulent flow, which greatly enhances the heat exchange efficiency between the air and the tire surface. Heat can be quickly diffused to the entire tire surface through the channels connected by these transverse grooves and the longitudinal grooves 1, and then dissipated through air convection, avoiding the influence of heat accumulation in the middle of the tire on the overall performance and achieving efficient heat dissipation.

[0043] The third-curve fractal groove 7 is composed of the wave transverse grooves 701 symmetric about the center line and the third arc transverse grooves 702 distributed on its curved surface. The front end of the wave of the wave transverse groove 701 extends to the longitudinal groove 1. The widths of the wave transverse groove 701 and the third arc transverse groove 702 are both 1 mm to 2 mm. The structure symmetric about the center line, combined with the connection between the wave transverse groove 701 and the longitudinal groove 1, enables air to form a stable and continuous air flow along the wavy grooves during the rotation of the tire. On the one hand, it helps to directly carry away the heat on the tire surface; on the other hand, it transfers the heat to other parts of the tire through the longitudinal groove 1, optimizing the heat conduction path, achieving all-round heat conduction and heat dissipation, effectively maintaining the uniformity of the tire temperature, and enhancing the stability of the tire during high-speed driving and long-term use.

[0044] It should be noted that in Embodiment 2, the first-curve fractal groove 5, the second-curve fractal groove 6, and the third-curve fractal groove 7 are all fractal designed with the ocean as the element. While ensuring the performance, the grooves on each tread block also have similarity and aesthetics.

[0045] Embodiment 3 As Figure 4 shown, the size and shape of the longitudinal groove 1 are the same as those in Embodiment 1, while the first-curve fractal groove 5, the second-curve fractal groove 6, and the third-curve fractal groove 7 are as Figure 4 shown.

[0046] Specifically, the first curve fractal groove 5 includes a first canyon line transverse groove 503, seven gentle slope line transverse grooves 504, and a flat valley line transverse groove 505. Multiple transverse grooves form a dense drainage network, and numerous channels can quickly disperse the water in the tire-ground contact area, increasing the drainage path and improving the drainage efficiency. The first canyon line transverse groove 503 extends to the longitudinal groove 1, that is, a canyon-like transverse groove composed of multiple contour lines. The middle width on the side close to the longitudinal groove 1, that is, the highest point of the canyon, is 11 mm to 13 mm; a width of 11 mm to 13 mm can enable a large amount of water in the transverse groove to be quickly discharged into the longitudinal groove, and then the longitudinal groove efficiently discharges the water from the tire contact area, effectively preventing the formation of a water film and reducing the risk of vehicle skidding. The gentle slope line transverse groove 504 is a long inclined line, and the angle with the horizontal line perpendicular to the tire side increases from 53° to 80°. The angle change, combined with the groove width, facilitates the water to be discharged more smoothly and quickly from the tire surface to the tire side under the action of centrifugal force and gravity, accelerating the drainage speed.

[0047] The first canyon line transverse groove 503 and other transverse grooves work together to greatly increase the contact area between the tire and the air. When the vehicle is running, the air can fully flow in these grooves, efficiently taking away the heat generated by the tire and improving the heat dissipation efficiency. The gentle slope line transverse groove 504, combined with the groove width, forms a complex air flow movement, strengthening air convection and enhancing the heat dissipation effect.

[0048] The second curve fractal groove 6 is centered on the mountaintop line transverse groove 604, that is, the springhead similar to the mountaintop in the attached drawing, and its outer periphery is surrounded by the gully line transverse groove 605, the second canyon line transverse groove 607, and the platform line transverse groove 606. It collects the water on the tire surface in all directions like a "surrounding circle", and then guides and discharges the water through different transverse grooves.

[0049] The gully line transverse groove 605, that is, a groove with multiple lines extending to the bottom of the longitudinal groove 1 on one side, the second canyon line transverse groove 607 extends to the bottom of the longitudinal groove 1 on the other side, and the platform line transverse groove 606 extends to the bottom of the longitudinal grooves 1 on both sides. Combining the width of each groove of 1 mm to 1.5 mm, the water can be quickly discharged into the longitudinal groove from multiple directions. No matter what driving state the tire is in, it can ensure good drainage ability, effectively disperse the water flow, and avoid water accumulation.

[0050] Multiple transverse grooves are connected to the longitudinal groove, constructing a three-dimensional heat dissipation channel on the tire surface and inside. The width of each transverse groove is 1 mm to 1.5 mm, and the network formed by their interconnection allows the air to flow freely therein, taking away the heat generated by different parts of the tire and improving the uniformity and effectiveness of heat dissipation. The surrounding groove structure greatly increases the contact area and contact time between the tire and the air. Combined with the groove width, it makes the heat exchange between the tire and the air more sufficient, which is conducive to the rapid dissipation of heat and reduces the tire temperature.

[0051] The third curved fractal groove 7 includes two third canyon line transverse grooves 703 that are centrally symmetrical. The symmetrical structure ensures that the drainage capacity on both sides of the tire is always balanced during rotation. No matter how the tire rotates, water can be evenly discharged from the center of the tire to both sides to avoid slipping due to poor drainage on one side. In addition, the central symmetrical structure on the middle pattern block 4 ensures more balanced heat dissipation of the tire. The third canyon line transverse grooves 703 on both sides allow air to flow evenly through both sides of the tire, taking away an equal amount of heat, avoiding local overheating, and maintaining the stability of the overall temperature of the tire.

[0052] It should be noted that the widths of the first curved fractal groove 5, the second curved fractal groove 6 and the third curved fractal groove 7 are all 1 mm to 1.5 mm. The sizes and spacings of the first canyon line transverse groove 503, the second canyon line transverse groove 607 and the third canyon line transverse groove 703 are all the same. That is, the different transverse grooves on the five pattern blocks are all designed in a fractal shape based on the contour mountain terrain. While ensuring performance, the grooves on each pattern block also have similarity and aesthetics.

[0053] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tread pattern with a curved fractal structure, characterized in that, Comprising: Four longitudinal grooves (1) opened along the circumferential direction of the tire, and the four longitudinal grooves (1) divide the tread into shoulder tread blocks (2), inner tread blocks (3) and intermediate tread blocks (4); The intermediate tread block (4) is the center line of the tire, and the four longitudinal grooves (1) are symmetrical about the center line of the intermediate tread block (4); On two of the shoulder tread blocks (2), there are first curve fractal grooves (5) symmetrical about the center of the intermediate tread block (4), and the first curve fractal grooves (5) extend to the tire side and the bottom of the longitudinal grooves (1); On two of the inner tread blocks (3), there are second curve fractal grooves (6) symmetrical about the center of the intermediate tread block (4), and the second curve fractal grooves (6) respectively extend to the bottoms of the longitudinal grooves (1) on both sides; The intermediate tread block (4) is symmetrically provided with third curve fractal grooves (7) about the center line, and the third curve fractal grooves (7) extend to the bottoms of the longitudinal grooves (1) on both sides.

2. The tread pattern with a curve fractal structure according to claim 1, characterized in that The longitudinal groove (1) includes a first groove wall (101) and a second groove wall (102), and both the first groove wall (101) and the second groove wall (102) are in a broken line shape; the first groove wall angle α formed by the first groove wall (101) and the tread is 18° - 23°, the second groove wall angle β is 10° - 15°, the third groove wall angle γ formed by the second groove wall (102) and the tread is 10° - 15°, and the fourth groove wall angle θ is 18° - 23°; The width of the longitudinal groove (1) is 11 mm - 15 mm, and the groove depth of the longitudinal groove (1) is 13 mm - 20 mm; The bottom of the longitudinal groove (1) is in a semi-circular shape, and the diameter of the semi-circular shape at the bottom of the longitudinal groove (1) is 3 - 8 mm.

3. The tread pattern with a curve fractal structure according to claim 2, characterized in that The first curve fractal groove (5) includes two wave-shaped transverse grooves (501) respectively extending to the tire side and the longitudinal groove (1), and the ends of the two wave-shaped transverse grooves (501) are connected; the first curve fractal groove (5) further includes an independent first arc-shaped transverse groove (502); The widths of the wave-shaped transverse groove (501) and the first arc-shaped transverse groove (502) are both 1 mm - 2 mm; the end spacing of the two wave-shaped transverse grooves (501) is 3 mm - 4 mm, and the bending angle of the first arc-shaped transverse groove (502) is 40° - 45°.

4. The tread pattern with a curve fractal structure according to claim 3, characterized in that The second curve fractal groove (6) includes a first wave crest transverse groove (601) extending to one side of the longitudinal groove (1) and a second wave crest transverse groove (602) extending to the other side of the longitudinal groove (1); the second curve fractal groove (6) further includes an independent second arc-shaped transverse groove (603); The widths of the first crest transverse groove (601), the second crest transverse groove (602), and the second arc-shaped transverse groove (603) are all 1 mm to 2 mm; the end spacings of the first crest transverse groove (601) are 6 mm to 7 mm, the end spacings of the second crest transverse groove (602) are 1.5 mm to 2 mm, and the bending angle of the second crest transverse groove (602) is 40° to 45°.

5. The tread pattern with a curved fractal structure according to claim 4, wherein the third curved fractal groove (7) includes a wave transverse groove (701) symmetric about the center line and a third arc-shaped transverse groove (702) distributed on the curved surface of the wave transverse groove (701), and the wave front end of the wave transverse groove (701) extends to the longitudinal groove (1); the widths of the wave transverse groove (701) and the third arc-shaped transverse groove (702) are both 1 mm to 2 mm.

6. The tread pattern with a curved fractal structure according to claim 2, wherein the first curved fractal groove (5) includes a first canyon line transverse groove (503), seven gentle slope line transverse grooves (504) extending to the tire side, and a flat valley line transverse groove (505); the first canyon line transverse groove (503) extends to the longitudinal groove (1); the middle width of the first canyon line transverse groove (503) on the side close to the longitudinal groove (1) is 11 mm to 13 mm; the included angle between the gentle slope line transverse groove (504) and the horizontal line perpendicular to the tire side increases from 53° to 80°.

7. The tread pattern with a curved fractal structure according to claim 6, wherein the second curved fractal groove (6) includes a mountaintop line transverse groove (604), and the mountaintop line transverse groove (604) is surrounded by a gully line transverse groove (605), a second canyon line transverse groove (607), and a platform line transverse groove (606); the gully line transverse groove (605) extends to the bottom of the longitudinal groove (1) on one side, the second canyon line transverse groove (607) extends to the bottom of the longitudinal groove (1) on the other side, and the platform line transverse groove (606) extends to the bottoms of the longitudinal grooves (1) on both sides.

8. The tread pattern with a curved fractal structure according to claim 7, wherein the third curved fractal groove (7) includes two third canyon line transverse grooves (703) that are centrosymmetric.

9. The tread pattern with a curved fractal structure according to claim 8, wherein the widths of the first curved fractal groove (5), the second curved fractal groove (6), and the third curved fractal groove (7) are all 1 mm to 1.5 mm.

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