A biomimetic snake scale tire tread structure

Abstract

The present invention relates to the technical field of tire tread design, and discloses a tire tread structure for anti-slip and noise reduction. The tire tread structure includes 5 tread blocks and 4 tread grooves arranged alternately, which are arranged horizontally along the tire tread. A number of independent shallow grooves or parallel and dense shallow grooves are provided on the tread blocks. All the shallow grooves are communicated with the tread grooves, and the width of the shallow grooves is only 1 mm and the depth is 1 mm. This design can avoid blocking air when the tread contacts the ground, reduce the number of closed tread grooves when the tread block touches the ground, thereby reducing resonance and noise. At the same time, the wave structure formed by the parallel and dense shallow grooves can increase drainage, effectively break the water film on wet or water-covered roads, enable the tire to have excellent grip when contacting the road surface, and ensure the driving safety of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of tire tread design, and specifically, to a bionic snake scale tire tread structure. Background Art

[0002] The tire tread pattern is also called the tread pattern. It is formed on the outer tire tread by molding or engraving. Its main functions are to improve the driving performance of the tire and enhance its aesthetics. The main types are: highway patterns suitable for driving on paved roads, also known as ordinary patterns; off-road patterns suitable for driving under unpaved conditions, also known as off-road tread patterns, where the area of the pattern blocks accounts for a relatively large proportion of the total area of the tire crown; a pattern with a highway pattern in the middle of the tread running surface and off-road patterns on both sides, called a mixed pattern, also known as a general pattern or all-purpose pattern, where the pattern contact area accounts for about sixty-five percent of the total area of the running surface; patterns with a requirement for the driving direction are called directional patterns, whose patterns are in a herringbone or oblique stripe shape, suitable for engineering machinery and agricultural tractor tires. It can provide good traction and self-cleaning performance. When installing a tire with this pattern, the apex of the herringbone or oblique stripe must be aligned with the driving direction, and an arrow indicating the driving direction should be marked on the tire side. If used in the reverse direction, mud will fill the grooves and the traction performance will be lost; snow and mud patterns suitable for driving on muddy and snowy roads, also known as winter tread patterns, which are a type of block pattern with sharp edges. This pattern has good anti-slip performance and can ensure the safe driving of the tire on ice, snow, and muddy roads.

[0003] Tire patterns need to be selected according to different requirements, but tire patterns are the most complex and difficult to handle in design. Many factors need to be considered. If it is biased towards grip, it is likely to generate relatively large noise. If it is biased towards drainage performance, it is likely to hinder the high-speed rotation of the tire. That is, when it is biased towards a certain specific ability, other performances will have significant deficiencies.

[0004] Chinese Invention Patent Publication No.: CN219969314U; Publication Date: November 7, 2023 discloses a steel radial tubeless tire tread pattern structure. The tire body includes a wheel disc and a tire tread. The tire tread is composed of a nine-equal-part loose mold. Main tread grooves and main tread blocks are evenly distributed on the tire tread. The main tread grooves include two central tread grooves and two side tread grooves. The main tread blocks include one central tread block and two side tread blocks, forming a pattern structure. Rectangular secondary tread blocks are evenly distributed longitudinally at intervals on the central tread block and the side tread blocks, with the long side along the longitudinal direction, and secondary block diagonal grooves are provided inside. However, the distribution of the secondary tread blocks is relatively dense towards the center, and there are no tread grooves on the shoulder tread blocks, and it does not focus on tire drainage and noise reduction. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a bionic snake scale tire tread structure.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A bionic snake scale tire tread structure, the tire tread structure includes 5 tread blocks and 4 tread grooves arranged alternately, arranged horizontally along the tire tread. The 5 tread blocks include a first tread block, a second tread block, a third tread block, a fourth tread block and a fifth tread block from left to right. The 4 tread grooves include a first tread groove, a second tread groove, a third tread groove and a fourth tread groove from left to right;

[0008] The first tread block and the fifth tread block are shoulder tread blocks. A number of first contours are arranged at intervals in the circumferential direction of the first tread block. The first contours extend from the first tread groove into the first tread block and enclose a triangle with the first tread groove; A first shallow groove is arranged around the outer circle of the first contour, and both ends of the first shallow groove are respectively connected to the first tread groove;

[0009] The pattern on the fifth tread block is centrosymmetric with the pattern on the first tread block;

[0010] The second tread block and the fourth tread block are intermediate tread blocks. A number of second contours are arranged at intervals in the circumferential direction on the left side of the second tread block. The second contours extend from the first tread groove into the second tread block. The second contours enclose a quadrilateral with the first tread groove. A second shallow groove is arranged around the outer circle of the second contours;

[0011] The second shallow groove includes a first end, a second end, a third end and a fourth end connected in sequence. The first end is the starting end and is connected to the first tread groove. The second end and the third end are located inside the second tread block. The fourth end is the terminating end and is connected to the first tread groove. A third shallow groove extends from the shallow groove connecting the second end and the third end to the first tread groove. The third shallow groove is connected to the first tread groove and the first end of the adjacent second shallow groove. The area enclosed by the groove connecting the fourth end and the third end of the second shallow groove, the third shallow groove and the first tread groove forms a triangle, and this triangle is symmetric about the left and right with the pattern on the first tread block; And a number of fourth shallow grooves parallel to the shallow groove connecting the second end and the third end are arranged inside the second contour;

[0012] The pattern on the right side of the second tread block is centrosymmetric with the pattern on the left side of the second tread block. A number of third contours are arranged at intervals in the circumferential direction on the right side of the second tread block. The third contours extend from the second tread groove into the second tread block. The third contours are opposite to the orientation of the second contours. The third contours enclose a quadrilateral with the second tread groove. A fifth shallow groove is arranged around the outer circle of the third contours;

[0013] The fifth shallow groove includes a first end, a second end, a third end, and a fourth end connected in sequence. The first end is the starting end and is connected to the second tread groove. The second end and the third end are located inside the second tread block. The fourth end is the terminating end and is connected to the second tread groove. A sixth shallow groove extends from the shallow groove connecting the second end and the third end towards the second tread groove. The sixth shallow groove is connected to the second tread groove and the first end of the adjacent fifth shallow groove. The area enclosed by the groove connecting the fourth end and the third end of the fifth shallow groove, the sixth shallow groove, and the second tread groove forms a triangle. And a number of fourth shallow grooves parallel to the shallow groove connecting the second end and the third end are provided within the third contour.

[0014] A seventh shallow groove extends from the second end of the second shallow groove towards the second end of the fifth shallow groove. The seventh shallow groove connects the second shallow groove and the fifth shallow groove.

[0015] The pattern on the fourth tread block is centrosymmetric with the pattern on the second tread block.

[0016] The third tread block is the central tread block. A number of fourth contours are circumferentially arranged on the left side of the third tread block at intervals. The fourth contour extends from the second tread groove towards the inside of the third tread block and encloses a triangle with the second tread groove, which is the same as the pattern on the fifth tread block. An eighth shallow groove is circumferentially arranged outside the fourth contour, and both ends of the eighth shallow groove are connected to the second tread groove.

[0017] A number of fifth contours are circumferentially arranged on the right side of the third tread block at intervals. The fifth contour extends from the third tread groove towards the inside of the third tread block and encloses a triangle with the third tread groove, which is the same as the pattern on the first tread block. A ninth shallow groove is circumferentially arranged outside the fifth contour, and both ends of the ninth shallow groove are connected to the third tread groove.

[0018] The cross-section of the first shallow groove, the second shallow groove, the third shallow groove, the fifth shallow groove, the sixth shallow groove, the seventh shallow groove, the eighth shallow groove, or the ninth shallow groove is an inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the cross-section is a semi-circle with a radius of 0.5 mm.

[0019] The fourth shallow groove has a groove depth of 1 mm and a groove width of 1 mm.

[0020] Preferably, the groove patterns of the first tread groove and the fourth tread groove are left-right symmetric, and the bottoms of the grooves are both rounded. The first tread groove has a groove depth of 18 mm and a groove width of 13 mm. The left groove wall is inclined 18°50′ from the center, and the right groove wall is inclined 13°10′ from the center.

[0021] Preferably, the groove patterns of the second tread groove and the third tread groove are left-right symmetric, and the bottoms of the grooves are both rounded. The second tread groove has a groove depth of 18 mm and a groove width of 12 mm, with a rounded corner depth of 3 mm. The left groove wall is inclined 19° from the center, and the right groove wall is inclined 13° from the center. More preferably, the radius of the circle where the arc of the rounded corner is located is 5 mm.

[0022] Furthermore, the present invention also discloses a all-steel tire, and the tread pattern of the all-steel tire adopts the tire pattern structure described above.

[0023] The beneficial effects of the present invention are as follows: A number of independent shallow grooves or parallel and dense shallow grooves are provided on the tread blocks, and all the shallow grooves are connected to the tread grooves, and the width of the shallow grooves is only 1 mm and the depth is 1 mm. This design can avoid blocking air when the tread contacts the ground, reduce the number of closed tread grooves when the tread block contacts the ground, thereby reducing resonance and noise; at the same time, the wave structure formed by the parallel and dense shallow grooves can increase drainage, effectively break the water film on wet or water-covered roads, and produce excellent grip when the tire contacts the road surface, ensuring the driving safety of the vehicle. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the tire pattern structure.

[0025] Figure 2 It is a schematic B-B cross-sectional view of the first shallow groove, the second shallow groove, the third shallow groove, the fifth shallow groove, the sixth shallow groove, the seventh shallow groove, the eighth shallow groove and the ninth shallow groove.

[0026] Figure 3 It is a partial A-A cross-sectional view of the second contour and the third contour.

[0027] Figure 4 It is a cross-sectional view of the tread groove. A: Schematic D-D cross-sectional view of the first tread groove, B: Schematic C-C cross-sectional view of the second tread groove, C: Schematic E-E cross-sectional view of the third tread groove, D: Schematic F-F cross-sectional view of the fourth tread groove.

[0028] Figure 5 It is a schematic diagram of the tire pattern structure of the reference example. Detailed Embodiments

[0029] Combined with the embodiments of the present invention below, the technical solutions in the embodiments will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0031] The following embodiments are described by combining Figures 1 - 4 illustrations.

[0032] A bionic snake scale tire tread structure, as Figure 1 shown, the tire tread structure includes 5 alternately arranged tread blocks and 4 tread grooves, which are arranged horizontally along the tire tread. The 5 tread blocks include the first tread block 11, the second tread block 12, the third tread block 13, the fourth tread block 14, and the fifth tread block 15 from left to right. The 4 tread grooves include the first tread groove 21, the second tread groove 22, the third tread groove 23, and the fourth tread groove 24 from left to right.

[0033] The first tread block 11 and the fifth tread block 15 are shoulder tread blocks. A number of first contours are arranged at intervals in the circumferential direction of the first tread block 11. The first contours extend from the first tread groove 21 into the first tread block 11 and enclose a triangle with the first tread groove 21. A first shallow groove 31 is arranged around the outer circle of the first contour. The two ends of the first shallow groove 31 are respectively connected to the first tread groove 21. As Figure 2 shown, the cross-section of the first shallow groove 31 is an inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the first shallow groove 31 is a semi-circle with a radius of 0.5 mm. This shoulder tread design can increase the shoulder grip while ensuring low noise.

[0034] The pattern on the fifth tread block 15 is centrosymmetric with the pattern on the first tread block 11.

[0035] The second tread block 12 and the fourth tread block 14 are intermediate tread blocks. A number of second contours are arranged at intervals in the circumferential direction on the left side of the second tread block 12. The second contours extend from the first tread groove 21 into the second tread block 12. The second contours enclose a quadrilateral with the first tread groove 21. A second shallow groove 32 is arranged around the outer circle of the second contour. As Figure 2 shown, the cross-section of the second shallow groove 32 is an inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the second shallow groove 32 is a semi-circle with a radius of 0.5 mm.

[0036] The second shallow groove 32 includes a first end, a second end, a third end, and a fourth end connected in sequence. The first end is the starting end and is connected to the first tread groove 21. The second end and the third end are located inside the second tread block 12. The fourth end is the terminating end and is connected to the first tread groove 21. A third shallow groove 33 extends from the shallow groove connecting the second end and the third end towards the first tread groove 21. As Figure 2As shown, the cross-section of the third shallow groove 33 is an inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the third shallow groove 33 is a semi-circle with a radius of 0.5 mm. The third shallow groove 33 is connected to the first pattern groove 21 and the first end of the adjacent second shallow groove 32. The area enclosed by the groove connecting the fourth end and the third end of the second shallow groove 32, the third shallow groove 33, and the first pattern groove 21 forms a triangle, and the pattern on this triangle and the first pattern block 11 are symmetrical left and right.

[0037] A number of fourth shallow grooves 34 parallel to the shallow grooves connecting the second end and the third end are arranged within the second contour. As Figure 4 shown, the fourth shallow groove 34 has a groove depth of 1 mm and a groove width of 1 mm, and the interval between every two fourth shallow grooves 34 is 1 mm. The local cross-section within the second contour is overall wavy, and each wave is a semi-circle with a radius of 0.5 mm. The pattern design within the second contour can prevent the fine grooves of the tread from blocking air when the tread contacts the ground, reduce the number of closed pattern grooves when the pattern block touches the ground, reduce resonance, and lower noise. At the same time, the wavy structure can effectively break the water film on wet or water-covered roads, enabling the tire to produce excellent grip when contacting the road surface and ensuring the driving safety of the vehicle.

[0038] The pattern on the right side of the second pattern block 12 is centrosymmetric with the pattern on the left side of the second pattern block 12. A number of third contours are circumferentially arranged on the right side of the second pattern block 12 at intervals. The third contour extends from the second pattern groove 22 into the second pattern block 12. The third contour is in the opposite direction to the second contour. The third contour and the second pattern groove 22 enclose a quadrilateral, and a fifth shallow groove 35 is arranged around the outer circle of the third contour. As Figure 2 shown, the cross-section of the fifth shallow groove 35 is an inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the fifth shallow groove 35 is a semi-circle with a radius of 0.5 mm.

[0039] The fifth shallow groove 35 includes a first end, a second end, a third end, and a fourth end connected in sequence. The first end is the starting end and is connected to the second pattern groove 22. The second end is connected to the first pattern groove 21. The second end and the third end are located inside the second pattern block 12. The fourth end is the terminating end and is connected to the second pattern groove 22. A sixth shallow groove 36 is extended from the shallow groove connecting the second end and the third end towards the second pattern groove 22. As Figure 2 shown, the cross-section of the sixth shallow groove 36 is an inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the sixth shallow groove 36 is a semi-circle with a radius of 0.5 mm. The sixth shallow groove 36 is connected to the second pattern groove 22 and the first end of the adjacent fifth shallow groove 35. The area enclosed by the groove connecting the fourth end and the third end of the fifth shallow groove 35, the sixth shallow groove 36, and the second pattern groove 22 forms a triangle. And a number of fourth shallow grooves 34 parallel to the shallow grooves connecting the second end and the third end are arranged within the third contour.

[0040] The second end of the second shallow groove 32 extends to the second end of the fifth shallow groove 35 to be provided with a seventh shallow groove 37, and the seventh shallow groove 37 communicates with the second shallow groove 32 and the fifth shallow groove 35; as Figure 2 shown, the cross-section of the seventh shallow groove 37 is an inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the seventh shallow groove 37 is a semi-circle with a radius of 0.5 mm.

[0041] The pattern on the fourth tread block 14 and the pattern on the second tread block 11 are centrosymmetric with each other.

[0042] The third tread block 13 is a central tread block. A plurality of fourth contours are circumferentially arranged on the left side of the third tread block 13 at intervals. The fourth contours extend from the second tread groove 22 into the third tread block 13 and enclose a triangle with the second tread groove 22, and are the same as the pattern on the fifth tread block 15. An eighth shallow groove 38 is circumferentially arranged on the outer circle of the fourth contours, and both ends of the eighth shallow groove 38 communicate with the second tread groove 22; as Figure 2 shown, the cross-section of the eighth shallow groove 38 is an inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the eighth shallow groove 38 is a semi-circle with a radius of 0.5 mm.

[0043] A plurality of fifth contours are circumferentially arranged on the right side of the third tread block 13 at intervals. The fifth contours extend from the third tread groove 23 into the third tread block 13 and enclose a triangle with the third tread groove 23, and are the same as the pattern on the first tread block 11. A ninth shallow groove 39 is circumferentially arranged on the outer circle of the fifth contours, and both ends of the ninth shallow groove 39 communicate with the third tread groove 23; as Figure 2 shown, the cross-section of the ninth shallow groove 39 is an inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the ninth shallow groove 39 is a semi-circle with a radius of 0.5 mm.

[0044] As Figure 4 shown, the groove patterns of the first tread groove 21 and the fourth tread groove 24 are left-right symmetric, and the bottoms of the grooves are both rounded; as Figure 4 shown in A, the first tread groove 21 has a groove depth of 18 mm and a groove width of 13 mm. The left groove wall is inclined 18°50′ from the center, and the right groove wall is inclined 13°10′ from the center; as Figure 4 shown in D, the fourth tread groove 24 has a groove depth of 18 mm and a groove width of 13 mm. The left groove wall is inclined 13°10′ from the center, and the right groove wall is inclined 18°50′ from the center.

[0045] As Figure 4 shown, the groove patterns of the second tread groove 22 and the third tread groove 23 are left-right symmetric, and the bottoms of the grooves are both rounded; as Figure 4As shown in Figure B, the second tread groove 22 has a groove depth of 18 mm, a groove width of 12 mm, a fillet depth of 3 mm, the left groove wall is inclined 19° from the center, and the right groove wall is inclined 13° from the center; as Figure 4 As shown in Figure C, the third tread groove 23 has a groove depth of 18 mm, a groove width of 12 mm, a fillet depth of 3 mm, the left groove wall is inclined 13° from the center, and the right groove wall is inclined 19° from the center. Among them, the radius of the circle where the arc tangent to the groove wall in the fillet is 5 mm.

[0046] Simulation software: tread design analysis system.

[0047] <Noise performance>

[0048] Based on the analysis of the sound generation mechanism of tire tread noise, a physical test model of tire tread noise suitable for computer simulation analysis was established. The tire was subjected to noise simulation analysis at a speed of 80 km / h.

[0049] Test object: The tires described in the reference example and Example 1 are of the same specification. The tire tread used in the reference example is as Figure 5 shown.

[0050] The test results are shown in Table 1.

[0051] Table 1

[0052] Reference Example Example 1 Tire Tread Saturation % 72.57 74.55 Noise dB 71 70

[0053] The above is the description of the embodiments of the present invention. Through the above description of the disclosed embodiments, those skilled in the art can implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel points disclosed herein.

Claims

1. A bionic snake scale tire tread structure, which includes 5 tread blocks and 4 tread grooves arranged alternately and transversely along the tire tread. The 5 tread blocks include the first tread block (11), the second tread block (12), the third tread block (13), the fourth tread block (14), and the fifth tread block (15) from left to right. The 4 tread grooves include the first tread groove (21), the second tread groove (22), the third tread groove (23), and the fourth tread groove (24) from left to right. It is characterized in that The first tread block (11) and the fifth tread block (15) are shoulder tread blocks. A number of first contours are arranged at intervals in the circumferential direction of the first tread block (11). The first contours extend from the first tread groove (21) into the first tread block (11) and enclose a triangle with the first tread groove (21). A first shallow groove (31) is arranged around the outer circle of the first contour, and both ends of the first shallow groove (31) are respectively connected to the first tread groove (21). The pattern on the fifth tread block (15) is centrosymmetric with the pattern on the first tread block (11). The second tread block (12) and the fourth tread block (14) are intermediate tread blocks. A number of second contours are arranged at intervals in the circumferential direction on the left side of the second tread block (12). The second contours extend from the first tread groove (21) into the second tread block (12). The second contours enclose a quadrilateral with the first tread groove (21), and a second shallow groove (32) is arranged around the outer circle of the second contours. The second shallow groove (32) includes a first end, a second end, a third end, and a fourth end connected in sequence. The first end is the starting end and is connected to the first tread groove (21). The second end and the third end are located inside the second tread block (12). The fourth end is the terminating end and is connected to the first tread groove (21). The shallow groove connecting the second end and the third end extends towards the first tread groove (21) and is provided with a third shallow groove (33). The third shallow groove (33) is connected to the first tread groove (21) and the first end of the adjacent second shallow groove (32). The area enclosed by the groove connecting the fourth end and the third end of the second shallow groove (32), the third shallow groove (33), and the first tread groove (21) forms a triangle, and this triangle is symmetric about the left and right with the pattern on the first tread block (11). And a number of fourth shallow grooves (34) parallel to the shallow groove connecting the second end and the third end are arranged inside the second contour. The pattern on the right side of the second tread block (12) is centrosymmetric with the pattern on the left side of the second tread block (12). A number of third contours are arranged at intervals in the circumferential direction on the right side of the second tread block (12). The third contours extend from the second tread groove (22) into the second tread block (12). The third contours are opposite to the orientation of the second contours. The third contours enclose a quadrilateral with the second tread groove (22), and a fifth shallow groove (35) is arranged around the outer circle of the third contours. The fifth shallow groove (35) includes a first end, a second end, a third end, and a fourth end connected in sequence. The first end is the starting end and is connected to the second tread groove (22). The second end and the third end are located inside the second tread block (12). The fourth end is the terminating end and is connected to the second tread groove (22). A sixth shallow groove (36) extends from the shallow groove connecting the second end and the third end towards the second tread groove (22). The sixth shallow groove (36) is connected to the second tread groove (22) and the first end of the adjacent fifth shallow groove (35). The area enclosed by the groove connecting the fourth end and the third end of the fifth shallow groove (35), the sixth shallow groove (36), and the second tread groove (22) forms a triangle. And a number of fourth shallow grooves (34) parallel to the shallow groove connecting the second end and the third end are provided within the third contour; A seventh shallow groove (37) extends from the second end of the second shallow groove (32) towards the second end of the fifth shallow groove (35). The seventh shallow groove (37) connects the second shallow groove (32) and the fifth shallow groove (35); The pattern on the fourth tread block (14) and the pattern on the second tread block (11) are centrosymmetric with each other; The third tread block (13) is the central tread block. A number of spaced fourth contours are circumferentially provided on the left side of the third tread block (13). The fourth contour extends from the second tread groove (22) into the third tread block (13) and forms a triangle with the second tread groove (22), which is the same as the pattern on the fifth tread block (15). An eighth shallow groove (38) is circumferentially provided on the outer circle of the fourth contour. Both ends of the eighth shallow groove (38) are connected to the second tread groove (22); A number of spaced fifth contours are circumferentially provided on the right side of the third tread block (13). The fifth contour extends from the third tread groove (23) into the third tread block (13) and forms a triangle with the third tread groove (23), which is the same as the pattern on the first tread block (11). A ninth shallow groove (39) is circumferentially provided on the outer circle of the fifth contour. Both ends of the ninth shallow groove (39) are connected to the third tread groove (23); The cross-section of the first shallow groove (31), the second shallow groove (32), the third shallow groove (33), the fifth shallow groove (35), the sixth shallow groove (36), the seventh shallow groove (37), the eighth shallow groove (38), or the ninth shallow groove (39) is an inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the cross-section is a semi-circle with a radius of 0.5 mm; The fourth shallow groove (34) has a groove depth of 1 mm and a groove width of 1 mm.

2. The tire tread structure according to claim 1, characterized in that, The groove shapes of the first tread groove (21) and the fourth tread groove (24) are left-right symmetric, and the bottoms of the grooves are both rounded. The first tread groove (21) has a groove depth of 18 mm and a groove width of 13 mm. The left groove wall is inclined 18°50′ from the center, and the right groove wall is inclined 13°10′ from the center.

3. The tire tread structure according to claim 1, characterized in that, The groove shapes of the second tread groove (22) and the third tread groove (23) are left-right symmetric, and the bottoms of the grooves are both rounded. The second tread groove (22) has a groove depth of 18 mm and a groove width of 12 mm, with a rounded corner depth of 3 mm. The left groove wall is inclined 19° from the center, and the right groove wall is inclined 13° from the center.

4. A all-steel tire, characterized in that, The tread pattern of this all-steel tire adopts the tire tread pattern structure described in any one of claims 1-3.

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