Tread tread with linear fractal structure

Abstract

The invention provides a tread pattern with a linear fractal structure, and relates to the technical field of vehicle tire tread pattern structures, the tread pattern comprises four longitudinal grooves which are longitudinally formed, and a tread is sequentially divided into an inner side tire shoulder pattern block, a left side pattern block, a middle pattern block, a right side pattern block and an outer side tire shoulder pattern block in the horizontal direction; every two of the four longitudinal grooves are symmetrical about the center line of the middle pattern block; the inner side tire shoulder pattern blocks and the outer side tire shoulder pattern blocks are provided with first linear fractal transverse grooves which are in central symmetry and extend to the tire side walls and the groove bottoms of the longitudinal grooves. Second linear fractal transverse grooves which are centrosymmetric are formed in the left pattern block and the right pattern block and extend to the groove bottoms of the longitudinal grooves in the two sides; third linear fractal transverse grooves extending to the groove bottoms of the longitudinal grooves on the two sides are formed in the middle pattern block, so that the technical problems that a water film is easily formed, the friction force between the tire and the ground is sharply reduced, and the water slip phenomenon is generated are solved, and the technical effect of improving the drainage performance and the road holding 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 tread pattern with a linear fractal structure. Background Art

[0002] In transportation, as a key component for a vehicle to contact the ground, the performance of a tire directly affects driving safety and comfort. Especially when driving on a wet and slippery road surface, the drainage performance of the tire is particularly important.

[0003] Currently, common tire tread patterns mainly adopt simple geometric shapes. Although they can achieve the drainage function to a certain extent, due to diverse vehicle driving scenarios, the drainage ability of the tread pattern is unstable under complex road conditions and different water accumulation depths. When a vehicle is driving at high speed on a waterlogged road surface, it is easy to form a water film between the tire and the ground, resulting in a sharp drop in the friction force between the tire and the ground and generating the "hydroplaning" phenomenon, threatening driving safety.

[0004] However, as a geometric form with self-similarity and infinite complexity, in the prior art, there is a lack of a tire tread pattern that utilizes a fractal structure to increase the number and complexity of drainage groove channels, thereby enhancing the drainage ability of the tire on a wet and slippery road surface and reducing the occurrence of the "hydroplaning" phenomenon. Summary of the Invention

[0005] The purpose of the present invention is to provide a tread pattern with a linear fractal structure, so as to alleviate the technical problems in the prior art that the tire tread pattern adopts a simple geometric shape, is easy to form a water film, resulting in a sharp drop in the friction force between the tire and the ground and generating the hydroplaning phenomenon.

[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 linear fractal structure, including four longitudinally opened longitudinal grooves. The four longitudinal grooves divide the tread into an inner shoulder tread block, a left tread block, a middle tread block, a right tread block, and an outer shoulder tread block in sequence along the horizontal direction; The four longitudinal grooves are symmetrically arranged in pairs with the center line of the middle tread block; First linear fractal transverse grooves that are centrosymmetric are opened on both the inner shoulder tread block and the outer shoulder tread block, and the first linear fractal transverse grooves extend to the sidewall of the tire and the bottom of the longitudinal grooves; Second linear fractal transverse grooves that are centrosymmetric are opened on both the left tread block and the right tread block, and the second linear fractal transverse grooves extend to the bottoms of the two side longitudinal grooves; A third linear fractal transverse groove that extends to the bottoms of the two side longitudinal grooves is opened on the middle tread block.

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

[0008] Further, the first straight fractal transverse groove includes a V-shaped transverse groove formed by fractal and a first fine groove; one end of the V-shaped transverse groove extends to the tire side, and the other end of the V-shaped transverse groove communicates with the first fine groove; the first fine groove extends to the tire side and the bottom of the longitudinal groove; The second straight fractal transverse groove includes two sets of C-shaped transverse grooves formed by fractal and a second fine groove; the two sets of C-shaped transverse grooves are symmetrically arranged, one side of the C-shaped transverse groove extends to the bottom of the longitudinal groove, the other side of the C-shaped transverse groove communicates with the second fine groove, and both ends of the third side of the C-shaped transverse groove communicate with the second fine groove and the bottom of the longitudinal groove; The third straight fractal transverse groove includes a rectangular transverse groove formed by fractal, a third fine groove formed by fractal, and an angular transverse groove formed by fractal; both corners of the rectangular transverse groove extend to the bottom of the longitudinal groove, both ends of the third fine groove extend to the bottoms of the two longitudinal grooves on both sides, and one side of the angular transverse groove extends to the bottom of the longitudinal groove.

[0009] Further, the included angles of the V-shaped transverse groove, the C-shaped transverse groove, and the angular transverse groove are all 45° - 60°; The widths of the grooves on the first straight fractal transverse groove, the second straight fractal transverse groove, and the third straight fractal transverse groove are all 0.5 mm - 2 mm, and the depths are 0.5 mm - 2 mm.

[0010] Further, the first straight fractal transverse groove is a first rectangular transverse groove formed by fractal. The first rectangular transverse groove includes five first narrow grooves and a second narrow groove perpendicular to the first narrow grooves. Two of the first narrow grooves extend to the tire side and the bottom of the longitudinal groove; The second straight fractal transverse groove is a second rectangular transverse groove formed by fractal. The second rectangular transverse groove includes four third narrow grooves and three fourth narrow grooves perpendicular to the third narrow grooves. Both ends of one of the third narrow grooves extend to the bottom of the longitudinal groove; The third straight fractal transverse groove is a third rectangular transverse groove formed by fractal. The third rectangular transverse groove includes three fifth narrow grooves and a sixth narrow groove perpendicular to the fifth narrow grooves. Both ends of one of the fifth narrow grooves extend to the bottom of the longitudinal groove.

[0011] Further, the widths of the grooves on the first rectangular transverse groove, the second rectangular transverse groove, and the third rectangular transverse groove are all 0.5 mm to 2 mm, the depths are 0.5 mm to 2 mm, and the inclination angles are 40° to 45°.

[0012] Further, the first linear fractal transverse groove is a first parallelogram transverse groove formed by fractal. The first parallelogram transverse groove includes eight first grooves extending from the tire side to the bottom of the longitudinal groove and second grooves perpendicular to the first grooves. The second linear fractal transverse groove is a second parallelogram transverse groove formed by fractal. The second parallelogram transverse groove includes eight third grooves extending to the bottom of the longitudinal groove, and eight fourth grooves are vertically and staggeredly arranged with the third grooves. The third linear fractal transverse groove is a third parallelogram transverse groove formed by fractal. The third parallelogram transverse groove includes six fifth grooves extending to the bottom of the longitudinal groove, and six sixth grooves are vertically arranged with the fifth grooves. Further, the widths of the grooves on the first parallelogram transverse groove, the second parallelogram transverse groove, and the third parallelogram transverse groove are all 0.5 mm to 2 mm, the depths are 1 mm to 2 mm, and the inclination angles are 50° to 55°.

[0013] Further, the first linear fractal transverse groove is a first Z-shaped transverse groove formed by fractal. The first Z-shaped transverse groove includes three first shallow grooves extending to the tire side and six second shallow grooves extending to the bottom of the longitudinal groove. The second linear fractal transverse groove is a triangular transverse groove formed by fractal. The triangular transverse groove includes eight third shallow grooves extending to the bottom of the longitudinal groove and three fourth shallow grooves communicating with the third shallow grooves. The third linear fractal transverse groove is a second Z-shaped transverse groove formed by fractal. The second Z-shaped transverse groove includes four fifth shallow grooves extending to the bottom of the longitudinal groove and sixth shallow grooves communicating with the fifth shallow grooves.

[0014] The widths of the first linear fractal transverse groove, the second linear fractal transverse groove, and the third linear fractal transverse groove are 2.5 mm to 3 mm.

[0015] Further, the first linear fractal transverse groove is a broken-line transverse groove. The two ends of the broken-line transverse groove extend to the tire side and the bottom of the longitudinal groove respectively, and an iron sheet fine groove is provided at the bending part of the broken-line transverse groove. The second linear fractal transverse groove is a goose-beak-shaped transverse groove formed by fractal. The two ends of the goose-beak-shaped transverse groove extend to the bottom of the longitudinal groove. The third linear fractal transverse groove is a goose-wing-shaped transverse groove formed by fractal. The two ends of the goose-wing-shaped transverse groove extend to the bottom of the longitudinal groove, and a vertical vertical groove is communicated with the goose-wing-shaped transverse groove.

[0016] The folding angle of the broken-line transverse groove is 45° to 47°; the sharp angle α of the goose-beak-shaped transverse groove is 95° to 97°, and the sharp angle β is 35° to 40°. The widths of the zigzag transverse grooves, the goosebill-shaped transverse grooves, and the goose-wing-shaped transverse grooves are 1 mm to 2 mm.

[0017] Beneficial effects: The present invention provides a tread pattern with a linear fractal structure, including four longitudinally opened longitudinal grooves. The four longitudinal grooves sequentially divide the tread into an inner shoulder tread block, a left tread block, a middle tread block, a right tread block, and an outer shoulder tread block along the horizontal direction; the four longitudinal grooves are symmetrically arranged in pairs with 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 on waterlogged roads, reducing the occurrence probability of the hydroplaning phenomenon.

[0018] The inner shoulder tread block and the outer shoulder tread block are both provided with first linear fractal transverse grooves that are centrosymmetric, and the first linear fractal transverse grooves extend to the sidewall of the tire and the bottom of the longitudinal grooves; the left tread block and the right tread block are both provided with second linear fractal transverse grooves that are centrosymmetric, and the second linear fractal transverse grooves extend to the bottoms of the two longitudinal grooves on both sides; the middle tread block is provided with a third linear fractal transverse groove that extends to the bottoms of the two longitudinal grooves on both sides. The fractal transverse grooves extend from the tread to the bottom of the tread longitudinal grooves, which helps to quickly drain water on rainy days or on slippery roads, reduce the formation of the water film, thereby improving the anti-hydroplaning performance of the tire, and can achieve the purpose of synergistically improving the noise performance and hydroplaning performance of the tire tread grooves.

[0019] The present invention utilizes the self-similarity and infinite complexity of the fractal structure to more evenly distribute the wear of the tire during use, extend the service life of the tire. By fracturing the grooves on the tread blocks, the contact area between the tire and the air is widened, which helps the heat generated during the use of the tire to dissipate faster, reducing the performance degradation caused by overheating; at the same time, the evenly distributed fine grooves are more conducive to draining water on the tread, reducing the formation of the water film, and increasing the grip of the tire.

[0020] In addition, the fractal pattern can not only provide functional advantages, but also serve as a visual identification of the tire brand, increasing the market attractiveness of the product. Description of the drawings

[0021] 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 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.

[0022] Figure 1 It is a schematic structural diagram of the tread pattern with a linear fractal structure provided by the first embodiment of the present invention; Figure 2 Schematic diagram of the left longitudinal groove in the tread pattern with a linear fractal structure provided by the first embodiment of the present invention; Figure 3 Schematic diagram of the right longitudinal groove in the tread pattern with a linear fractal structure provided by the first embodiment of the present invention; Figure 4 Schematic diagram of the transverse groove in the tread pattern with a linear fractal structure provided by the first embodiment of the present invention; Figure 5 Schematic diagram of the transverse groove in the tread pattern with a linear fractal structure provided by the first embodiment of the present invention; Figure 6 Schematic diagram of the transverse groove in the tread pattern with a linear fractal structure provided by the second embodiment of the present invention; Figure 7 Schematic diagram of the transverse groove in the tread pattern with a linear fractal structure provided by the third embodiment of the present invention; Figure 8 Schematic diagram of the transverse groove in the tread pattern with a linear fractal structure provided by the fourth embodiment of the present invention; Figure 9 Schematic diagram of the transverse groove in the tread pattern with a linear fractal structure provided by the fifth embodiment of the present invention.

[0023] Icon: 1 - longitudinal groove; 2 - inner shoulder tread block; 3 - left tread block; 4 - middle tread block; 5 - right tread block; 6 - outer shoulder tread block; 7 - first linear fractal transverse groove; 8 - second linear fractal transverse groove; 9 - third linear fractal transverse groove; 101 - first groove wall; 102 - second groove wall; 701 - V-shaped transverse groove; 702 - first narrow groove; 801 - C-shaped transverse groove; 802 - second narrow groove; 901 - rectangular transverse groove; 902 - third narrow groove; 903 - angular transverse groove; 703 - first rectangular transverse groove; 704 - first narrow ditch; 705 - second narrow ditch; 803 - second rectangular transverse groove; 804 - third narrow ditch; 805 - fourth narrow ditch; 904 - third rectangular transverse groove; 905 - fifth narrow ditch; 906 - sixth narrow ditch; 706 - first parallelogram transverse groove; 707 - first ditch; 708 - second ditch; 806 - second parallelogram transverse groove; 807 - third ditch; 808 - fourth ditch; 907 - third parallelogram transverse groove; 908 - fifth ditch; 909 - sixth ditch; 709 - First Z-shaped transverse groove; 710 - First shallow groove; 711 - Second shallow groove; 809 - Triangular transverse groove; 810 - Third shallow groove; 811 - Fourth shallow groove; 910 - Second Z-shaped transverse groove; 911 - Fifth shallow groove; 912 - Sixth shallow groove; 712 - Broken line transverse groove; 713 - Thin iron sheet groove; 812 - Goosebill-shaped transverse groove; 913 - Goose wing-shaped transverse groove; 914 - Vertical groove. Specific embodiments

[0024] 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.

[0025] 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.

[0026] Embodiment 1 As Figure 1 shown, the present invention provides a tread pattern with a linear fractal structure, including four longitudinally opened longitudinal grooves 1. The four longitudinal grooves 1 sequentially divide the tread into an inner shoulder tread block 2, a left tread block 3, a middle tread block 4, a right tread block 5, and an outer shoulder tread block 6 along the horizontal direction; The four longitudinal grooves 1 are symmetrically arranged in pairs with the center line of the middle tread block 4; Both the inner shoulder tread block 2 and the outer shoulder tread block 6 are provided with first linear fractal transverse grooves 7 that are centrosymmetric, and the first linear fractal transverse grooves 7 extend to the tread side and the bottom of the longitudinal groove 1; Both the left tread block 3 and the right tread block 5 are provided with second linear fractal transverse grooves 8 that are centrosymmetric, and the second linear fractal transverse grooves 8 extend to the bottoms of the two longitudinal grooves 1 on both sides; The middle tread block 4 is provided with a third linear fractal transverse groove 9 that extends to the bottoms of the two longitudinal grooves 1 on both sides.

[0027] Specifically, the four longitudinal grooves 1 divide the tire tread into five tread blocks; the four longitudinal grooves 1 are symmetrically arranged in pairs with the center line of the middle tread block 4, that is, the groove wall angles of the two longitudinal grooves 1 on the left are different from those of the two longitudinal grooves 1 on the right. By providing the longitudinal grooves 1 on the tire tread, abnormal wear of the tire can be prevented. Among them, the inner shoulder tread block 2 and the outer shoulder tread block 6 are symmetrically arranged, the left tread block 3 and the right tread block 5 are symmetrically arranged, and the tread patterns on the five tread blocks adopt a fractal structure.

[0028] The longitudinal groove 1 can effectively prevent abnormal wear of the tire and balance the tire ground contact pressure. During vehicle driving, the longitudinal groove 1 can disperse the acting force from the road surface, avoid excessive pressure on a certain area of the tire, and make the wear of each part of the tire more uniform. When turning, the pressure on the outer tire of the vehicle will increase. At this time, the longitudinal groove 1 can disperse this part of the extra pressure to other parts, preventing excessive wear of the outer tread block 6. At the same time, the longitudinal groove 1 can also guide the deformation of the tire during rolling, making the deformation of the tire more reasonable. In addition to preventing abnormal wear, on a wet and slippery road surface, the longitudinal groove 1 can quickly drain water, reduce the risk of hydroplaning, and improve the driving safety on wet ground; the four different tread blocks through fractal design cooperate with each other, enhancing the tire's grip on various road conditions, and ensuring the vehicle's handling stability and driving smoothness.

[0029] The first straight fractal transverse grooves 7 that are centrosymmetric on the inner tread block 2 and the outer tread block 6, the second straight fractal transverse grooves 8 that are centrosymmetric on the left tread block 3 and the right tread block 5, and the third straight fractal transverse groove 9 on the middle tread block 4; The first straight fractal transverse groove 7, the second straight fractal transverse groove 8, and the third straight fractal transverse groove 9 are all fractal in a straight-line shape; the irregularity of the fractal structure enables the tire to better adapt to different road conditions when in contact with the ground. Whether it is a flat road or a road with slight undulations, it can closely fit, thus significantly enhancing the tire's grip and improving the vehicle's handling stability and safety during driving.

[0030] At the same time, the first straight fractal transverse groove 7 extends to the tire sidewall and the bottom of the longitudinal groove 1, forming an efficient drainage channel. When driving on a wet and slippery road surface, the accumulated water can flow to the tire sidewall through the first straight fractal transverse groove 7, and at the same time, through the connection with the bottom of the longitudinal groove 1, the accumulated water can be quickly drained, greatly reducing the risk of the vehicle hydroplaning. The second straight fractal transverse groove 8 extends to the bottom of the two longitudinal grooves 1 on both sides, enabling the accumulated water in the middle area of the tire to be quickly drained horizontally. Cooperating with the longitudinal drainage of the longitudinal groove 1, a crisscross drainage network is formed, accelerating the drainage speed. The third straight fractal transverse groove 9 on the middle tread block 4 that extends to the bottom of the two longitudinal grooves 1 on both sides ensures that when the tire is driving at high speed, the accumulated water can also be drained in time, always maintaining good grip on wet ground. The fractal transverse grooves on the three tread blocks extend from the tread surface to the bottom of the tread longitudinal groove, effectively reducing the formation of the water film between the tire and the ground, being able to drain the accumulated water in time, breaking the continuity of the water film, and keeping the effective contact between the tire and the ground all the time, improving the anti-hydroplaning performance of the tire, and ensuring the safety and stability of the vehicle when driving on a wet and slippery road surface.

[0031] Therefore, by utilizing the self-similarity and infinite complexity of the fractal structure, the wear of the tire during use can be more evenly distributed, extending the service life of the tire. By fracturing the grooves on the tread blocks, the contact area between the tire and the air is widened, which helps the heat generated during tire use to dissipate more quickly, reducing the performance degradation caused by overheating. At the same time, the evenly distributed fine grooves are more conducive to draining water on the tread surface, reducing the formation of water films, and increasing the tire's grip.

[0032] In addition, the transverse groove pattern of the fractal structure can not only provide functional advantages but also serve as a visual identification of the tire brand, increasing the market attractiveness of the product.

[0033] In Embodiment 1 of the present invention, as Figure 2 、 Figure 3 shown, 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 13 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.

[0034] Specifically, 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 3 shown, the two longitudinal grooves on the left and right are respectively shown. The longitudinal groove 1 includes a first groove wall 101 and a second groove wall 102 in a broken line shape, and the height from the broken line to the tread is 3 mm - 6 mm. 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 as the included angle at the broken line 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 also the included angle at the broken line, with an angle of 18° - 23°. During the wear process of the tire, abnormal wear is likely to occur. Once wear starts at a certain position, the wear area will continuously expand outward from that position. The longitudinal grooves with different angles can effectively relieve the repeated wear of the same position of the tread block, enabling the tire to achieve uniform wear, thereby greatly extending the service life of the tire and effectively alleviating the problem of abnormal tire wear.

[0035] Although the groove wall angles are exchanged, the width of the longitudinal groove is 13mm to 15mm. The width ensures the drainage performance of the longitudinal groove. Compared with the drainage effect when the groove wall angles are not exchanged, when driving on rainy days or slippery roads, the longitudinal groove 1 can drain the accumulated water between the tire and the ground, reducing the risk of hydroplaning and ensuring the safety and stability of vehicle driving.

[0036] The depth of the longitudinal groove 1 is 13mm to 20mm, and the bottom is a narrow semicircular groove with a semicircular diameter of 3 to 8mm. It can effectively prevent stones from getting stuck in the groove, greatly improving the tire's stone clamping prevention rate. When the vehicle is driving on a road with more complicated road conditions, reducing the stones from getting stuck in the groove can not only avoid damage to the tire, but also reduce the noise caused by stone friction, and improve the driving comfort of the vehicle.

[0037] In embodiment 1 of the present invention, Figure 5 As shown, the first linear fractal transverse groove 7 is arranged on the inner shoulder pattern block 2 and the outer shoulder pattern block 6, as shown in FIG. Figure 5 As shown, it is composed of a fractal V-shaped transverse groove 701 and a first fine groove 702. One end of the V-shaped transverse groove 701 extends to the sidewall, and the other end is connected to the first fine groove 702, and the first fine groove 702 extends to the sidewall and the bottom of the longitudinal groove 1. Compared with setting only a single coarse groove at the same position, the noise reduction effect is improved. When the tire rolls, the vibration of the transverse groove will generate noise, and the fractal structure of the V-shaped transverse groove 701 and the first fine groove 702 can effectively disperse the vibration energy, thereby reducing the noise value caused by the vibration of the transverse groove. At the same time, the transverse groove is connected to the longitudinal groove 1. When driving on rainy days, the accumulated water can quickly flow into the longitudinal groove 1 through the V-shaped transverse groove 701 and the first fine groove 702, and then be discharged between the tire and the ground, which effectively improves the drainage of the tire and reduces the risk of hydroplaning when the vehicle is driving on slippery roads.

[0038] The second linear fractal transverse groove 8 is arranged on the surface of the left pattern block 3 and the right pattern block 5, and includes two groups of fractal C-shaped transverse grooves 801 and second fine grooves 802. The two groups of C-shaped transverse grooves 801 are symmetrically arranged, one side of the C-shaped transverse groove 801 extends to the bottom of the longitudinal groove 1, the other side is connected to the second fine groove 802, and the two ends of the third side are connected to the bottom of the second fine groove 802 and the longitudinal groove 1. When the tire contacts the flooded road surface, the accumulated water can flow into the longitudinal groove 1 from multiple directions through the C-shaped transverse groove 801 and the second fine groove 802, which speeds up the drainage speed. The fine grooves that are convenient to connect can better discharge gas when contacting the ground.

[0039] The third straight-line fractal transverse groove 9 is arranged on the surface of the middle tread block 4 and is composed of rectangular grooves 901 formed by fractal, third fine grooves 902, and angular grooves 903. The two corners of the rectangular groove 901 extend to the bottom of the longitudinal groove 1, the two ends of the third fine groove 902 extend to the bottoms of the longitudinal grooves 1 on both sides, and one side of the angular groove 903 extends to the bottom of the longitudinal groove 1. This not only enhances the drainage capacity of the tire but also improves the overall stability of the tire. During the drainage process, the rectangular groove 901 and the angular groove 903 can guide the accumulated water to quickly flow towards the longitudinal groove 1, and the third fine groove 902 further ensures the smooth flow of the accumulated water between the longitudinal grooves 1 on both sides.

[0040] Specifically, the included angles of the V-shaped transverse groove 701, the C-shaped transverse groove 801, and the angular groove 903 are all within 45° to 60°. As Figure 4 shown, the groove widths of the first straight-line fractal transverse groove 7, the second straight-line fractal transverse groove 8, and the third straight-line fractal transverse groove 9 are all 0.5 mm to 2 mm, and the depths are 0.5 mm to 2 mm, which not only ensures the effectiveness of the fractal transverse grooves in drainage and noise reduction but also does not affect the overall strength of the tire.

[0041] 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 tread transverse grooves on the inner shoulder tread block 2, the left tread block 3, the middle tread block 4, the right tread block 5, and the outer shoulder tread block 6 are as Figure 6 shown.

[0042] Specifically, the first straight-line fractal transverse groove 7 is a first rectangular groove 703 formed by fractal, that is, the first straight-line fractal transverse groove 7 is formed by fractal of multiple rectangles, and the length and width of the composed rectangles include five first narrow grooves 704 (the slanting lines tilting to the left in the figure) and second narrow grooves 705 (the slanting lines tilting to the right in the figure) perpendicular to the first narrow grooves 704, and two of the first narrow grooves 704 extend to the tread side and the bottom of the longitudinal groove 1. An efficient drainage network is formed. When the vehicle is driving on a waterlogged road surface, the accumulated water can quickly pass through the first narrow grooves 704 and the second narrow grooves 705 and flow into the longitudinal groove 1 through multiple channels and be discharged, greatly reducing the risk of hydroplaning and ensuring the safety of the vehicle when driving on a wet road surface. The first rectangular groove 703 increases the contact area between the tire and the ground, and the first narrow grooves 704 and the second narrow grooves 705 in different directions make the friction force distribution between the tire and the ground more uniform. Whether it is during acceleration, deceleration, or turning, it can provide more stable and reliable grip, significantly improving the handling stability of the vehicle. When the tire rolls, the vibration of the transverse groove will generate noise, and the first rectangular groove 703 can disperse the vibration energy in multiple directions, effectively reducing the generation of noise and providing a quieter and more comfortable environment.

[0043] The second straight fractal transverse groove 8 is the second rectangular transverse groove 803 formed by fractal, that is, formed by fractal of multiple rectangles. The length and width of the constituent rectangles include four third narrow grooves 804 and three fourth narrow grooves 805 arranged perpendicular to the third narrow grooves 804. The two ends of one third narrow groove 804 extend to the bottom of the longitudinal groove 1. In terms of drainage, accumulated water can flow into the longitudinal groove 1 through the third narrow grooves 804 and the fourth narrow grooves 805 from multiple angles, improving the drainage efficiency and enabling the tire to drain accumulated water in a timely manner even when driving at high speed.

[0044] The third straight fractal transverse groove 9 is the third rectangular transverse groove 904 formed by fractal, that is, formed by fractal of two rectangles and a diagonal line. It includes three fifth narrow grooves 905 and sixth narrow grooves 906 arranged perpendicular to the fifth narrow grooves 905. The two ends of one fifth narrow groove 905 extend to the bottom of the longitudinal groove 1, which not only improves the drainage system to ensure that accumulated water can be drained quickly and effectively, but also plays a role in strengthening the structural stability of the tire. During the driving process of the vehicle, the tire will bear various complex stresses. The third straight fractal transverse groove 9 can better disperse these stresses, reduce abnormal wear caused by local stress concentration of the tire, and thus extend the service life of the tire.

[0045] The groove widths of the first rectangular transverse groove 703, the second rectangular transverse groove 803, and the third rectangular transverse groove 904 are all 0.5 mm to 2 mm, the depths are 0.5 mm to 2 mm, and the inclination angles are 45° to 60°. It is determined on the basis of fully considering performance requirements such as drainage, grip, and noise reduction, as well as tire manufacturing processes and costs, ensuring that while the fractal structure plays various advantages, it has good practicality and economy.

[0046] It should be noted that the width of the small rectangle formed by the first rectangular transverse groove 703 is 7 mm to 8 mm, and the width of the large rectangle is 14 mm to 16 mm; the width of the rectangle formed by the second rectangular transverse groove 803 is 7 mm to 8 mm; the width of the small rectangle formed by the third rectangular transverse groove is 3.5 mm to 4 mm. This makes the patterns on each tread block fractal and increase in multiples. The large and small rectangles are in multiples, and the complex channels composed of rectangles of different sizes improve the fractal structure of the entire tire tread. In terms of drainage, rectangles of different sizes cooperate with each other to guide accumulated water into the longitudinal groove from different angles, ensuring no dead angle in drainage. In terms of structural stability, the distribution of rectangles of different sizes but in a multiple relationship enhances the overall strength of the tire, better coping with various stresses during driving, reducing abnormal wear, and extending the service life of the tire.

[0047] Embodiment 3 In Embodiment 3 of the present invention, the size and shape of the longitudinal groove 1 are the same as those in Embodiment 1, while the transverse grooves on the inner shoulder tread block 2, the left tread block 3, the middle tread block 4, the right tread block 5, and the outer shoulder tread block 6 are as shown in Figure 7 shown.

[0048] Specifically, the first linear fractal transverse groove 7 is a first parallelogram transverse groove 706 formed by fractal. As shown in Figure 7 shown, it includes a parallelogram formed by fractalizing three sides and a group of single-sided parallelograms; among them, it includes eight first grooves 707 (the slanting lines tilting to the left in the figure) extending to the sidewall and the bottom of the longitudinal groove 1, and a second groove 708 (the slanting lines tilting to the right in the figure) perpendicular to the first groove 707. The first groove 707 and the second groove 708 form a parallelogram-shaped structure. The groove width of this transverse groove is 0.5 mm to 2 mm, the depth is 1 mm to 2 mm, and the inclination angle is between 50° and 55°. Since the first groove 707 extends to the sidewall and the bottom of the longitudinal groove 1, the accumulated water can quickly flow in from the sidewall and be quickly discharged to the longitudinal groove 1 through the crisscrossing channels. The multi-channel drainage design greatly improves the drainage efficiency and effectively reduces the occurrence of hydroplaning. In terms of grip, the grid structure of the parallelogram increases the contact area between the tire and the ground, and the grooves in different directions enable the tire to better grip the ground in all directions, providing stable and reliable grip whether accelerating, braking, or turning.

[0049] The second linear fractal transverse groove 8 is a second parallelogram transverse groove 806 formed by fractal. As shown in Figure 7 shown, it includes a parallelogram formed by fractalizing three sides and a group of single-sided parallelograms stacked together, containing eight third grooves 807 extending to the bottom of the longitudinal groove 1, and eight fourth grooves 808 are vertically and staggeredly arranged with the third grooves 807, constituting a dense parallelogram fractal structure. Its groove width, depth, and inclination angle are the same as those of the first linear fractal transverse groove 7. The staggered parallelograms further enhance the drainage performance. When driving in rainy weather, the accumulated water can quickly flow into the longitudinal groove 1 from multiple directions, with a faster drainage speed, enabling the tire to always maintain good contact with the ground.

[0050] The third linear fractal transverse groove 9 is a third parallelogram transverse groove 907 formed by fractal. As can be seen from the figure, as shown in Figure 7 shown, it includes a parallelogram formed by fractalizing three sides, which is composed of six fifth grooves 908 extending to the bottom of the longitudinal groove 1 and six sixth grooves 909 arranged vertically. Since it is arranged on the middle tread block 4, although the number of grooves is small, in terms of grip, the structural design of the parallelogram makes the contact between the tire and the ground more directional, and can provide stable grip under specific driving conditions, such as straight driving or small-angle turning.

[0051] It should be noted that the width between the parallelogram formed by three sides in the first parallelogram transverse groove 706 and a group of single-sided parallelograms is 7 mm to 8 mm; the width of the parallelogram in the second parallelogram transverse groove 806 is 3.5 mm to 4 mm; the width of the parallelogram in the third parallelogram transverse groove 907 is 14 mm to 16 mm.

[0052] In terms of drainage performance, the dimensions of the three fractal transverse grooves are interrelated and act together, enabling the tire to drain water in a timely and effective manner on a wet road surface, reducing the risk of hydroplaning, and maintaining good grip and driving stability.

[0053] Example 4 In Example 4 of the present invention, the dimensions and shapes of the longitudinal grooves 1 are the same as those in Example 1, and the tread transverse grooves on the inner shoulder tread blocks 2, left tread blocks 3, middle tread blocks 4, right tread blocks 5, and outer shoulder tread blocks 6 are as Figure 8 shown.

[0054] The first Z-shaped transverse groove 709 presents the shape of the letter Z. Its structure includes three first shallow grooves 710 extending to the tire side (the slanting lines tilting to the left in the figure) and six second shallow grooves 711 extending to the bottom of the longitudinal groove 1 (the slanting lines tilting to the right in the figure). These shallow grooves intersect with each other to form a complex drainage and grip network. The three first shallow grooves 710 extending to the tire side are like "water diversion channels", which can quickly introduce the water on the tire side into the transverse groove system when the tire contacts the waterlogged road surface. And the six second shallow grooves 711 extending to the bottom of the longitudinal groove 1 further guide the water to be discharged through the longitudinal groove. This multi-channel improves the drainage efficiency and effectively reduces the possibility of hydroplaning.

[0055] The triangular transverse groove 809 presents a triangular shape and is composed of eight third shallow grooves 810 extending to the bottom of the longitudinal groove 1 and three fourth shallow grooves 811 communicating with the third shallow grooves 810. It can collect the water on the tire surface and direct it to be discharged through the longitudinal groove. And the three fourth shallow grooves 811 communicating with the third shallow grooves 810 optimize the drainage path, enabling the water to be discharged from the tire more smoothly. In terms of grip, the triangular structural design increases the roughness of the tire surface and has a greater frictional force with the ground. When the vehicle encounters different road conditions during driving, it can better adapt to the road surface changes, provide reliable grip, and ensure the driving stability of the vehicle. At the same time, the structure of the triangular transverse groove also helps to disperse the stress during vehicle driving, reduce the local wear of the tire, and extend the service life of the tire.

[0056] The second Z-shaped transverse groove 910 includes four fifth shallow grooves 911 extending to the bottom of the longitudinal groove 1 and a sixth shallow groove 912 connected to the fifth shallow groove 911. Its Z-shaped structure echoes the first Z-shaped transverse groove 709, but has different components. The four fifth shallow grooves 911 extending to the bottom of the longitudinal groove 1 provide an important channel for the drainage of accumulated water, and can quickly guide the accumulated water on the tire surface to the longitudinal groove. The sixth shallow groove 912 connected to the fifth shallow groove 911 further improves the drainage and grip structure of the transverse groove.

[0057] It should be noted that the first Z-shaped transverse groove 709 and the second Z-shaped transverse groove 910 are in the shape of a letter Z, and the spacing between the two fractal Z shapes is 4.8mm to 5.5mm; the spacing formed by the triangular transverse groove 809 is 2.3mm to 2.6mm; these three fractal transverse grooves cooperate with each other on the tire to form similar fractal structures and work together. In terms of drainage, through their respective drainage channels and interconnected structures, the accumulated water can be drained quickly and effectively to ensure that the tire can maintain good grip performance even on slippery roads. In terms of grip, transverse groove structures of different shapes increase the complexity and diversity of the contact between the tire and the ground, adapt to various road conditions, and provide stable and reliable grip. At the same time, these transverse groove structures can also disperse vibration and stress to a certain extent, reduce noise, and reduce tire wear, thereby improving the overall performance and service life of the tire.

[0058] Example 5 In the fifth embodiment of the present invention, the size and shape of the longitudinal groove 1 are the same as those in the first embodiment, while the transverse grooves on the inner shoulder pattern block 2, the left pattern block 3, the middle pattern block 4, the right pattern block 5 and the outer shoulder pattern block 6 are as follows: Figure 9 shown.

[0059] The first linear fractal transverse groove 7 is a fold line transverse groove 712, and the fold line transverse groove 712 has a fold angle, that is, an angle between the bend and the longitudinal horizontal line of 45° to 47°, so that the fold line transverse groove 712 forms a unique flow guide path on the tread. The iron sheet groove 713 at the bend is a groove formed when the steel sheet is inserted during tire vulcanization, and after the vulcanization is completed and the steel sheet is pulled out; the iron sheet groove 713 increases the complexity and diversity of the overall transverse groove and increases the rigidity of the tire.

[0060] The second linear fractal transverse groove 8 is a fractal goose-beak-shaped transverse groove 812, and the sharp angle α of the goose-beak-shaped transverse groove 812, i.e., the end of a large triangle, is 95° to 97°, and the sharp angle β, i.e., the end of a small triangle, is 35° to 40°. This allows the opening of the transverse groove to effectively collect accumulated water and, during the rolling process of the tire, to use the inertia of the water flow to quickly guide the accumulated water to the longitudinal groove. Moreover, when in contact with the ground, it can provide friction in different directions to increase the stability of the tire's grip.

[0061] The third straight-line fractal transverse groove 9 is fractally formed into a wild-goose-wing-shaped transverse groove 913. The way the wild-goose-wing-shaped transverse groove 913 extends to the bottom of the longitudinal groove 1 and the connected vertical grooves 914 form a three-dimensional drainage and stress conduction system. The transverse wild-goose-wing-shaped structure can disperse stress when the tire is stressed transversely, reducing the deformation of the tread blocks; while the vertical grooves 914 provide additional support and drainage channels in the vertical direction, further enhancing the comprehensive performance of the tire.

[0062] In addition, the widths of all three transverse grooves are controlled within 1 mm to 2 mm, ensuring sufficient drainage space while not overly weakening the rigidity of the tread blocks.

[0063] The zigzag transverse groove 712, the wild-goose-beak-shaped transverse groove 812, and the wild-goose-wing-shaped transverse groove 913 use the fractal structure formed by the straight-line shape, which is similar to the shape of a wild goose. When forming a drainage network, they reduce the thickness of the water film between the tire and the ground, significantly enhancing the drainage ability of the tire on a wet and slippery road surface, effectively reducing the risk of skidding while increasing the aesthetic appearance.

[0064] 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 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 linear fractal structure, characterized in that, Including: Four longitudinally opened longitudinal grooves (1), and the four longitudinal grooves (1) divide the tread into an inner shoulder tread block (2), a left tread block (3), a middle tread block (4), a right tread block (5) and an outer shoulder tread block (6) in sequence along the horizontal direction; The four longitudinal grooves (1) are symmetrically arranged in pairs with the center line of the middle tread block (4); The inner shoulder tread block (2) and the outer shoulder tread block (6) are both provided with first linear fractal transverse grooves (7) that are centrosymmetric, and the first linear fractal transverse grooves (7) extend to the tire side and the groove bottom of the longitudinal groove (1); The left tread block (3) and the right tread block (5) are both provided with second linear fractal transverse grooves (8) that are centrosymmetric, and the second linear fractal transverse grooves (8) extend to the groove bottoms of the two longitudinal grooves (1) on both sides; The middle tread block (4) is provided with third linear fractal transverse grooves (9) that extend to the groove bottoms of the two longitudinal grooves (1) on both sides.

2. The tread pattern with a linear 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 zigzag 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 13 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 linear fractal structure according to claim 2, characterized in that The first linear fractal transverse groove (7) includes a V-shaped transverse groove (701) formed by fractal and a first fine groove (702); one end of the V-shaped transverse groove (701) extends to the tire side, and the other end of the V-shaped transverse groove (701) is communicated with the first fine groove (702); the first fine groove (702) extends to the tire side and the groove bottom of the longitudinal groove (1); The second linear fractal transverse groove (8) includes two groups of C-shaped transverse grooves (801) formed by fractal and a second fine groove (802); the two groups of C-shaped transverse grooves (801) are symmetrically arranged, one side of the C-shaped transverse groove (801) extends to the groove bottom of the longitudinal groove (1), the other side of the C-shaped transverse groove (801) is communicated with the second fine groove (802), and the two ends of the third side of the C-shaped transverse groove (801) communicate the second fine groove (802) and the groove bottom of the longitudinal groove (1); The third linear fractal transverse groove (9) includes a rectangular transverse groove (901) formed by fractal, a third fine groove (902) formed by fractal, and an angular transverse groove (903) formed by fractal; two corners of the rectangular transverse groove (901) extend to the bottom of the longitudinal groove (1), both ends of the third fine groove (902) extend to the bottom of the longitudinal grooves (1) on both sides, and one side of the angular transverse groove (903) extends to the bottom of the longitudinal groove (1).

4. The tread pattern with a linear fractal structure according to claim 3, characterized in that the included angles of the V-shaped transverse groove (701), the C-shaped transverse groove (801), and the angular transverse groove (903) are all 45° to 60°; the widths of the grooves on the first linear fractal transverse groove (7), the second linear fractal transverse groove (8), and the third linear fractal transverse groove (9) are all 0.5 mm to 2 mm, and the depths are 0.5 mm to 2 mm.

5. The tread pattern with a linear fractal structure according to claim 2, characterized in that the first linear fractal transverse groove (7) is a first rectangular transverse groove (703) formed by fractal, the first rectangular transverse groove (703) includes five first narrow grooves (704) and second narrow grooves (705) perpendicular to the first narrow grooves (704), and two of the first narrow grooves (704) extend to the tire side and the bottom of the longitudinal groove (1); the second linear fractal transverse groove (8) is a second rectangular transverse groove (803) formed by fractal, the second rectangular transverse groove (803) includes four third narrow grooves (804) and three fourth narrow grooves (805) perpendicular to the third narrow grooves (804), and both ends of one of the third narrow grooves (804) extend to the bottom of the longitudinal groove (1); the third linear fractal transverse groove (9) is a third rectangular transverse groove (904) formed by fractal, the third rectangular transverse groove (904) includes three fifth narrow grooves (905) and sixth narrow grooves (906) perpendicular to the fifth narrow grooves (905), and both ends of one of the fifth narrow grooves (905) extend to the bottom of the longitudinal groove (1).

6. The tread pattern with a linear fractal structure according to claim 5, characterized in that the widths of the grooves on the first rectangular transverse groove (703), the second rectangular transverse groove (803), and the third rectangular transverse groove (904) are all 0.5 mm to 2 mm, the depths are 0.5 mm to 2 mm, and the inclination angles are 40° to 45°.

7. The tread pattern with a linear fractal structure according to claim 2, characterized in that the first linear fractal transverse groove (7) is a first parallelogram transverse groove (706) formed by fractal, the first parallelogram transverse groove (706) includes eight first grooves (707) extending to the tire side and the bottom of the longitudinal groove (1) and second grooves (708) perpendicular to the first grooves (707); The second linear fractal transverse groove (8) is a second parallelogram transverse groove (806) formed by fractal. The second parallelogram transverse groove (806) includes eight third grooves (807) extending to the bottom of the longitudinal groove (1), and eight fourth grooves (808) are vertically and staggeredly arranged in the third grooves (807); The third linear fractal transverse groove (9) is a third parallelogram transverse groove (907) formed by fractal. The third parallelogram transverse groove (907) includes six fifth grooves (908) extending to the bottom of the longitudinal groove (1), and six sixth grooves (909) are vertically arranged in the fifth grooves (908).

8. The tread pattern with a linear fractal structure according to claim 7, wherein The widths of the grooves on the first parallelogram transverse groove (706), the second parallelogram transverse groove (806) and the third parallelogram transverse groove (907) are all 0.5 mm to 2 mm, the depths are 1 mm to 2 mm, and the inclination angles are 50° to 55°.

9. The tread pattern with a linear fractal structure according to claim 2, wherein The first linear fractal transverse groove (7) is a first Z-shaped transverse groove (709) formed by fractal. The first Z-shaped transverse groove (709) includes three first shallow grooves (710) extending to the tire side and six second shallow grooves (711) extending to the bottom of the longitudinal groove (1); The second linear fractal transverse groove (8) is a triangular transverse groove (809) formed by fractal. The triangular transverse groove (809) includes eight third shallow grooves (810) extending to the bottom of the longitudinal groove (1) and three fourth shallow grooves (811) communicating with the third shallow grooves (810); The third linear fractal transverse groove (9) is a second Z-shaped transverse groove (910) formed by fractal. The second Z-shaped transverse groove (910) includes four fifth shallow grooves (911) extending to the bottom of the longitudinal groove (1) and sixth shallow grooves (912) communicating with the fifth shallow grooves (911); The widths of the first linear fractal transverse groove (7), the second linear fractal transverse groove (8) and the third linear fractal transverse groove (9) are 2.5 mm to 3 mm.

10. The tread pattern with a linear fractal structure according to claim 2, wherein The first linear fractal transverse groove (7) is a broken-line transverse groove (712). The two ends of the broken-line transverse groove (712) extend to the tire side and the bottom of the longitudinal groove (1) respectively, and an iron sheet fine groove (713) is provided at the bending part of the broken-line transverse groove (712); The second linear fractal transverse groove (8) is a goose-beak-shaped transverse groove (812) formed by fractal. The two ends of the goose-beak-shaped transverse groove (812) extend to the bottom of the longitudinal groove (1); The third linear fractal transverse groove (9) is a goose-wing-shaped transverse groove (913) formed by fractal. The two ends of the goose-wing-shaped transverse groove (913) extend to the bottom of the longitudinal groove (1), and a vertical vertical groove (914) is communicated with the goose-wing-shaped transverse groove (913); The folding angle of the folded transverse groove (712) is 45° to 47°; the sharp angle α of the goose-beak-shaped transverse groove (812) is 95° to 97°, and the sharp angle β is 35° to 40°; The widths of the folded transverse groove (712), the goose-beak-shaped transverse groove (812) and the goose-wing-shaped transverse groove (913) are 1 mm to 2 mm.

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