A noise-reducing tread pattern structure for all-steel tires

Abstract

The present invention relates to the technical field of tire tread design, and discloses a noise-reducing tread structure for all-steel tires. 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 communicate 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 noise reduction tread structure for all-steel tires. Background Art

[0002] The tire tread pattern is also known as the tread pattern. It is molded or engraved on the outer tire tread. 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 on unpaved roads, also known as off-road tread patterns, and the proportion of the pattern block area in the total crown area is relatively large; the middle part of the tire tread driving surface is a highway pattern, and the two sides are off-road patterns, which is called a mixed pattern, also known as a universal pattern or all-purpose pattern, and the pattern contact area accounts for about sixty-five percent of the total driving surface area; patterns with driving direction requirements are called directional patterns, and their patterns are in a herringbone or diagonal shape, suitable for engineering machinery and agricultural tractor tires. It can provide good traction and self-cleaning properties. When installing a tire with this pattern, the apex of the herringbone or diagonal shape must be consistent with the driving direction, and an arrow is marked on the tire side to indicate the driving direction. If used in the reverse direction, the mud will fill the grooves and the traction performance will be lost; the snow and mud pattern, also known as the winter tread pattern, suitable for driving on muddy and snowy roads, is a kind 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. It needs to consider many factors. If it is biased towards grip, it is easy to generate relatively large noise. If it is biased towards drainage performance, it is easy to hinder the high-speed rotation of the tire. That is, when it is biased towards a certain specific ability, other performances will have great deficiencies.

[0004] Chinese Invention Patent (Publication No.: CN219969314U; Publication Date: November 7, 2023) discloses a tread pattern structure for an all-steel load-carrying tubeless radial tire. The tire body includes a wheel disc and a tire tread. The tire tread is composed of nine equal parts of a flexible 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 tread 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 oblique 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 noise reduction tread structure for all-steel tires.

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

[0007] A noise-reducing tread pattern structure for all-steel tires, the tread pattern structure includes 5 tread blocks and 4 tread grooves arranged alternately, horizontally disposed along the tire tread. The 5 tread blocks from left to right include a first tread block, a second tread block, a third tread block, a fourth tread block and a fifth tread block. The 4 tread grooves from left to right include a first tread groove, a second tread groove, a third tread groove and a fourth tread groove;

[0008] The first tread block and the fifth tread block are shoulder tread blocks. The first tread block is provided with a circumferentially arranged annular first shallow groove; a number of spaced first contours are also provided circumferentially on the first tread block. The first contours extend from the first tread groove into the first tread block. The first contours and the first tread groove enclose a parallelogram; a second shallow groove is circumferentially arranged outside the first contours. 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 first tread block. The fourth end is the terminating end and is connected to the first tread groove. The shallow groove connecting the second end and the third end is connected to the first shallow groove; a number of mutually parallel inclined shallow grooves are arranged inside the first contours;

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

[0010] The second tread block and the fourth tread block are intermediate tread blocks. A number of spaced second contours are provided circumferentially 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 and the first tread groove enclose a parallelogram. A third shallow groove is circumferentially arranged outside the second contours. The third shallow groove includes a first end, a second end, a third end and a fourth end connected in sequence. The first end is above the fourth end. 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;

[0011] A number of spaced third contours are provided circumferentially 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 and the second tread groove enclose a parallelogram; a fourth shallow groove is circumferentially arranged outside the third contours. The fourth shallow groove includes a first end, a second end, a third end and a fourth end connected in sequence. The first end is above the fourth end. 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 number of mutually parallel inclined shallow grooves are arranged inside the third contours;

[0012] The tread pattern on the fourth tread block is centrosymmetric with the tread pattern on the second tread block;

[0013] The third tread block is the central tread block, and the third tread block is provided with a circumferentially arranged annular fifth shallow groove.

[0014] Preferably, the cross-section of the first shallow groove, the second shallow groove, the third shallow groove, the fourth shallow groove or the fifth shallow groove is an inverted arch shape, the groove depth is 1 mm, the groove width is 1 mm, the lower half of the cross-section is a semi-circle, and the radius of the semi-circle is 0.5 mm;

[0015] The inclined shallow groove has a groove depth of 1 mm and a groove width of 1 mm.

[0016] Preferably, the groove patterns of the first tread groove and the fourth tread groove are symmetric about the left and right, and the bottoms of the grooves are both rounded; the first tread groove has a groove depth of 18 mm, 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.

[0017] Preferably, the groove patterns of the second tread groove and the third tread groove are symmetric about the left and right, and the bottoms of the grooves are both rounded; the second tread groove has a groove depth of 18 mm, a groove width of 12 mm, the depth of the rounded corner is 3 mm, the left groove wall is inclined 19° from the center, and the right groove wall is inclined 13° from the center; preferably, the radius of the circle where the arc of the rounded corner is located is 5 mm.

[0018] Furthermore, the present invention also discloses a steel radial tire, and the tread pattern of the steel radial tire adopts the tire tread pattern structure described above.

[0019] The beneficial effects of the present invention are as follows: a plurality of independent shallow grooves or parallel and dense shallow grooves are arranged on the tread block, all the shallow grooves are communicated with the tread grooves, and the groove width of the shallow grooves is only 1 mm and the groove 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 a wet or water road surface, enable the tire to have excellent grip when contacting the road surface, and ensure the driving safety of the vehicle. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the tire tread pattern structure.

[0021] 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 fourth shallow groove or the fifth shallow groove.

[0022] Figure 3 It is a schematic partial A-A cross-sectional view of the first contour and the third contour.

[0023] Figure 4It is a schematic cross-sectional view of the tread groove. A: Schematic cross-sectional view of the first tread groove D-D. B: Schematic cross-sectional view of the second tread groove C-C. C: Schematic cross-sectional view of the third tread groove E-E. D: Schematic cross-sectional view of the fourth tread groove F-F.

[0024] Figure 5 It is a schematic diagram of the tire tread pattern structure of the reference example. Specific implementation manners

[0025] Next, in combination with the embodiments of the present invention, 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.

[0026] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are 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 thus should not be construed as a limitation to the present application.

[0027] The following embodiments are described by combining Figures 1 - 4 Explanation.

[0028] As Figure 1 shown, a noise-reducing tread pattern structure for all-steel tires, the tire tread pattern structure includes 5 tread blocks and 4 tread grooves arranged alternately, 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.

[0029] The first tread block 11 and the fifth tread block 15 are shoulder tread blocks. The first tread block 11 is provided with a circumferentially arranged annular first shallow groove 31. As Figure 2 shown, the cross-section of the first shallow groove 31 is an inverted arch shape, the groove depth is 1 mm, the groove width is 1 mm, and the lower half of the first shallow groove 31 is a semi-circle with a radius of 0.5 mm.

[0030] A number of first contours are also provided circumferentially on the first tread block 11 at intervals. The first contours extend from the first tread grooves 21 into the first tread block 11. The first contours and the first tread grooves 21 enclose a parallelogram. A second shallow groove 32 is provided around the outer circle of the first contour. 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 first tread block 11. 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 is connected to the first shallow groove 31. 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.

[0031] A number of mutually parallel inclined shallow grooves 4 are provided inside the first contour. As Figure 3 shown, the inclined shallow grooves 4 have a groove depth of 1 mm and a groove width of 1 mm. The interval between every two inclined shallow grooves 4 is 1 mm. The local cross-section inside the first contour is integrally wavy, and each wave is a semi-circle with a radius of 0.5 mm. The tread pattern design inside the first contour can prevent the fine grooves of the tread from blocking air when the tread contacts the ground, reduce the number of closed tread grooves when the tread block contacts the ground, reduce resonance, and reduce noise. At the same time, the wavy structure can effectively break the water film on a wet or water-covered road surface, enabling the tire to produce excellent grip when contacting the road surface and ensuring the driving safety of the vehicle.

[0032] The tread pattern on the fifth tread block 15 is centrosymmetric with the tread pattern on the first tread block 11.

[0033] The second tread block 12 and the fourth tread block 14 are intermediate tread blocks. A number of second contours are provided circumferentially on the left side of the second tread block 12 at intervals. The second contours extend from the first tread grooves 21 into the second tread block 12. The second contours and the first tread grooves 21 enclose a parallelogram. A third shallow groove 33 is provided around the outer circle of the second contour. The third shallow groove 33 includes a first end, a second end, a third end, and a fourth end connected in sequence. The first end is located above the fourth end. 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. As Figure 2 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.

[0034] On the right side of the second tread block 12, a number of third contours are circumferentially arranged at intervals. The third contours extend from the second tread groove 22 into the second tread block 12. The third contours and the second tread groove 22 enclose a parallelogram. Around the outer circle of the third contours, a fourth shallow groove 34 is arranged. The fourth shallow groove 34 includes a first end, a second end, a third end, and a fourth end that are connected in sequence. The first end is above the fourth end. The first end is the starting end and is connected to the second tread groove 22. The second end and the third end are inside the second tread block 12. The fourth end is the terminating end and is connected to the second tread groove 22. As Figure 2 shown, the cross-section of the fourth shallow groove 34 is an inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the fourth shallow groove 34 is a semi-circle with a radius of 0.5 mm.

[0035] Inside the third contours, a number of mutually parallel inclined shallow grooves 4 are arranged. As Figure 3 shown, the groove depth of the inclined shallow groove 4 is 1 mm and the groove width is 1 mm. The interval between every two inclined shallow grooves 4 is 1 mm. The local cross-section inside the first contour is integrally wavy, and each wave is a semi-circle with a radius of 0.5 mm. The tread pattern design inside the first contour can prevent the fine grooves of the tread from blocking air when the tread contacts the ground, reduce the number of closed tread grooves when the tread 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 waterlogged roads, enabling the tire to produce excellent grip when contacting the road surface and ensuring the driving safety of the vehicle.

[0036] The tread pattern on the fourth tread block 14 is centrosymmetric with the tread pattern on the second tread block 11.

[0037] The third tread block 13 is the central tread block. The third tread block 13 is provided with a circumferentially arranged annular fifth shallow groove 35. 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.

[0038] 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 groove depth of the first tread groove 21 is 18 mm and the groove width is 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 groove depth of the fourth tread groove 24 is 18 mm and the groove width is 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.

[0039] 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 (B), the second tread groove 22 has a groove depth of 18 mm, a groove width of 12 mm, a chamfer 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 (C), the third tread groove 23 has a groove depth of 18 mm, a groove width of 12 mm, a chamfer 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 chamfer is 5 mm.

[0040] <Noise performance>

[0041] Based on the analysis of the noise generation mechanism of tire treads, 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.

[0042] 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.

[0043] The test results are shown in Table 1.

[0044] Table 1

[0045] Reference Example Example 1 Tire Tread Saturation Rate (%) 72.57 74.60 Noise (dB) 71 70

[0046] 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 noise-reducing tread pattern structure for all-steel tires. The tread pattern structure includes 5 tread blocks and 4 tread grooves arranged alternately, and is set horizontally along the tire tread. The 5 tread blocks from left to right include a first tread block (11), a second tread block (12), a third tread block (13), a fourth tread block (14), and a fifth tread block (15). The 4 tread grooves from left to right include a first tread groove (21), a second tread groove (22), a third tread groove (23), and a fourth tread groove (24). It is characterized in that The first tread block (11) and the fifth tread block (15) are shoulder tread blocks. The first tread block (11) is provided with a circumferentially arranged annular first shallow groove (31). A number of spaced first contours are also arranged circumferentially on the first tread block (11). The first contours extend from the first tread groove (21) into the interior of the first tread block (11). The first contours and the first tread groove (21) enclose a parallelogram. A second shallow groove (32) is arranged to surround the outer circle of the first 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 first tread block (11). 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 is connected to the first shallow groove (31). A number of mutually parallel inclined shallow grooves (4) are arranged inside the first contours. The tread pattern on the fifth tread block (15) is centrosymmetric with the tread 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 spaced second contours are arranged circumferentially on the left side of the second tread block (12). The second contours extend from the first tread groove (21) into the interior of the second tread block (12). The second contours and the first tread groove (21) enclose a parallelogram. A third shallow groove (33) is arranged to surround the outer circle of the second contours. The third shallow groove (33) includes a first end, a second end, a third end, and a fourth end connected in sequence. The first end is above the fourth end. 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 number of spaced third contours are arranged circumferentially on the right side of the second tread block (12). The third contours extend from the second tread groove (22) into the interior of the second tread block (12). The third contours and the second tread groove (22) enclose a parallelogram. A fourth shallow groove (34) is arranged to surround the outer circle of the third contours. The fourth shallow groove (34) includes a first end, a second end, a third end, and a fourth end connected in sequence. The first end is above the fourth end. 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 number of mutually parallel inclined shallow grooves (4) are arranged inside the third contours. The tread pattern on the fourth tread block (14) is centrosymmetric with the tread pattern on the second tread block (11). The third tread block (13) is a central tread block, and the third tread block (13) is provided with a circumferentially arranged annular fifth shallow groove (35); The cross-section of the first shallow groove (31), the second shallow groove (32), the third shallow groove (33), the fourth shallow groove (34) or the fifth shallow groove (35) is an inverted arch shape, the groove depth is 1 mm, the groove width is 1 mm, the lower half of the cross-section is a semi-circle, and the radius of the semi-circle is 0.5 mm; The inclined shallow groove (4) has a groove depth of 1 mm and a groove width of 1 mm.

2. The all-steel tire noise reduction tread pattern structure according to claim 1, wherein 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 chamfered; the first tread groove (21) has a groove depth of 18 mm, 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 all-steel tire noise-reducing tread pattern structure according to claim 1, characterized in that, 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 chamfered; the second tread groove (22) has a groove depth of 18 mm, a groove width of 12 mm, the chamfered depth is 3 mm, the left groove wall is inclined 19° from the center, and the right groove wall is inclined 13° from the center.

4. The all-steel tire noise-reducing tread pattern structure according to claim 3, characterized in that, The radius of the circle where the arc included in the chamfered corner is located is 5 mm.

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

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