A tire tread structure for noise reduction

Abstract

The present invention relates to the technical field of tire tread design, specifically a noise-reducing tire tread structure. The structure comprises five alternating tread blocks and four tread grooves arranged transversely along the tire tread. The tread blocks are provided with a number of independent shallow grooves or parallel, closely spaced shallow grooves, all interconnected with the tread grooves. The shallow grooves are only 1-2 mm wide and 1 mm deep. This design prevents air from being trapped when the tread contacts the ground, reducing the number of closed grooves when the tread blocks touch the ground, thereby reducing resonance and noise. Furthermore, the wavy structure formed by the parallel, closely spaced shallow grooves enhances drainage and effectively breaks up the water film on wet or flooded roads, resulting in excellent tire-road grip and ensuring safe driving.

Description

Technical Field

[0001] The present invention relates to the technical field of tire pattern design, in particular to a noise-reducing tire pattern structure. Background Art

[0002] Tire tread pattern is also called tread pattern. It is molded or engraved on the outer tread, and its main function is to improve the driving performance of the tire while also enhancing its appearance. The main types are: road pattern suitable for driving on paved roads, also known as ordinary pattern; off-road pattern suitable for driving under unpaved conditions, also known as off-road tread pattern, whose pattern block area accounts for a large proportion of the total crown area; the middle part of the tread driving surface is a road pattern, and the two sides are off-road patterns, which is called a mixed pattern, also known as a universal pattern or a universal pattern, and its pattern contact area accounts for about 65% of the total driving surface area; the pattern with driving direction requirements is called a directional pattern, and its pattern is in the shape of a herringbone or oblique stripes, suitable for Used in tires for construction machinery and agricultural tractors, it can provide good traction and self-cleaning properties. When installing tires with this pattern, the apex of the herringbone or oblique strips must be consistent with the direction of travel, and the direction of travel must be marked with an arrow on the sidewall. If mud is used in the opposite direction, the grooves will be filled and traction performance will be lost. The snow and mud pattern suitable for driving on muddy and icy roads is also called the winter tread pattern. This is a block pattern with sharp edges. This pattern has good anti-slip properties and can ensure the safe driving of the tire on icy, snowy and muddy roads.

[0003] Tire treads require different models based on specific needs, but they are the most complex and challenging to design. Many factors must be considered: favoring grip can lead to louder noise, while favoring drainage can hinder high-speed tire rotation. In other words, favoring one specific performance factor can significantly compromise other performance factors.

[0004] A Chinese invention patent (publication number: CN219969314U; publication date: November 7, 2023) discloses a tread pattern structure for an all-steel, load-bearing, tubeless radial tire. The tire body comprises a wheel disc and a tread. The tread is constructed from a nine-part flexible mold. The tread is evenly distributed with primary grooves and primary blocks. The primary grooves comprise two central grooves and two side grooves, while the primary blocks comprise one central block and two side blocks, forming a tread structure. Rectangular secondary blocks are evenly spaced longitudinally above the central and side blocks, with their long edges running longitudinally and internally provided with diagonal secondary block grooves. However, the secondary blocks are densely distributed toward the center, and the shoulder blocks lack grooves, indicating a lack of emphasis on water drainage and noise reduction. Summary of the Invention

[0005] The present invention aims to overcome the deficiencies of the prior art and provides a tire tread structure with reduced noise.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] A noise-reducing tire pattern structure, comprising five alternating tread blocks and four tread grooves arranged transversely along the tire tread, the five tread blocks comprising, from left to right, a first tread block, a second tread block, a third tread block, a fourth tread block, and a fifth tread block, and the four tread grooves comprising, from left to right, a first tread groove, a second tread groove, a third tread groove, and a fourth tread groove;

[0008] The first and fifth tread blocks are shoulder tread blocks;

[0009] A plurality of first profiles are provided at intervals on the right circumference of the second pattern block. The first profile extends from the second pattern groove to the first pattern groove, forming a deformed and tilted inverted "Z" shape. The oblique line in the middle of the "Z" shape is deformed to be perpendicular to the two horizontal lines. A first shallow groove is provided around the outer circle of the first profile.

[0010] The first shallow groove includes a first endpoint, a second endpoint, a third endpoint, a fourth endpoint, a fifth endpoint, and a sixth endpoint connected in sequence, the second endpoint being connected to the first pattern groove, the fifth endpoint being connected to the second pattern groove, and the remaining endpoints being located within the second pattern block, with the first endpoint and the fourth endpoint being located on the same circumferential loop line; a circumferentially arranged second shallow groove is provided within the first profile, connecting the first endpoint and the fourth endpoint, and a plurality of circumferentially arranged third shallow grooves are also provided; a third auxiliary shallow groove is provided at the third endpoint of the first shallow groove, extending toward the first groove and connecting to the first groove; a fourth auxiliary shallow groove is provided at the sixth endpoint of the first shallow groove, extending toward the second groove and connecting to the second groove;

[0011] The second shallow groove is extended to the left and right sides respectively to form a first secondary shallow groove and a second secondary shallow groove; the first secondary shallow groove and the second secondary shallow groove are quadrilaterals, the first secondary shallow groove is close to the sixth end point, and the second secondary shallow groove is close to the third end point;

[0012] The pattern on the fourth pattern block is centrally symmetrical to the pattern on the second pattern block;

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

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

[0015] The cross section of the second shallow groove is a rounded rectangle with a groove depth of 1 mm, a groove width of 2 mm, and a fillet radius of 0.5 mm;

[0016] The third shallow groove has a depth of 1 mm and a width of 1 mm.

[0017] Preferably, the first and fourth grooves are bilaterally symmetrical, and the groove bottoms are both rounded; the first groove is 18 mm deep and 13 mm wide, the left groove wall is inclined 18°50′ from the center, and the right groove wall is inclined 13°10′ from the center.

[0018] Preferably, the second and third grooves are bilaterally symmetrical, and the groove bottoms are both chamfered; the second groove is 18 mm deep, 12 mm wide, and 3 mm deep in the chamfer; 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 containing the arc of the chamfer is 5 mm.

[0019] Furthermore, the present invention also discloses an all-steel tire, the tread pattern of which adopts the tire pattern structure.

[0020] The beneficial effects of this invention are as follows: The tread blocks are provided with a number of independent shallow grooves or parallel, densely packed shallow grooves, all of which are interconnected with the tread grooves. The shallow grooves are only 1-2 mm wide and 1 mm deep. This design prevents air from being trapped when the tread contacts the ground, reducing the number of closed grooves when the tread blocks touch the ground, thereby reducing resonance and noise. Furthermore, the wavy structure formed by the densely packed shallow grooves enhances drainage and effectively breaks up the water film on wet or flooded roads, allowing the tire to maintain excellent grip on the road and ensuring safe driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of tire pattern structure.

[0022] Figure 2 This is a schematic diagram of the BB cross-section of the first shallow groove, the fourth shallow groove, the first auxiliary shallow groove, the second auxiliary shallow groove, the third auxiliary shallow groove and the fourth auxiliary shallow groove.

[0023] Figure 3 Schematic diagram of the GG cross section of the second shallow groove.

[0024] Figure 4 Schematic diagram of the local AA section of the first and third contours.

[0025] Figure 5 Schematic cross-sectional views of the grooves, A: schematic cross-sectional view of the first groove DD, B: schematic cross-sectional view of the second groove CC, C: schematic cross-sectional view of the third groove EE, D: schematic cross-sectional view of the fourth groove FF.

[0026] Figure 6 Schematic diagram of the tire tread structure for the reference example. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0028] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0029] The following examples are combined Figure 1-Figure 5 illustrate.

[0030] A noise-reducing tire pattern structure includes five alternating tread blocks and four tread grooves arranged laterally along the tire tread. The five tread blocks include, from left to right, 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 four tread grooves include, from left to right, a first tread groove 21, a second tread groove 22, a third tread groove 23, and a fourth tread groove 24.

[0031] The first block 11 and the fifth block 15 are shoulder blocks.

[0032] A plurality of first profiles are provided at intervals on the right circumference of the second tread block 12. The first profile extends from the second groove 22 to the first groove 21 and is a deformed and tilted inverted "Z" shape. The oblique line in the middle of the "Z" shape is deformed to be perpendicular to the two horizontal lines. A first shallow groove 31 is provided around the outer circle of the first profile. Figure 2 As 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 semicircle with a semicircle radius of 0.5 mm.

[0033] The first shallow groove 31 includes a first endpoint, a second endpoint, a third endpoint, a fourth endpoint, a fifth endpoint and a sixth endpoint connected in sequence. The second endpoint is connected to the first pattern groove 21, the fifth endpoint is connected to the second pattern groove 22, and the remaining endpoints are all located inside the second pattern block 12. The first endpoint and the fourth endpoint are located on the same circumferential loop line. A circumferentially arranged second shallow groove 32 is provided inside the first profile to connect the first endpoint and the fourth endpoint, and a plurality of circumferentially arranged third shallow grooves 33 are also provided. A third auxiliary shallow groove 43 is provided at the third endpoint of the first shallow groove 31 extending toward the first groove 21 and connected to the first groove 21. A fourth auxiliary shallow groove 44 is provided at the sixth endpoint of the first shallow groove 31 extending toward the second groove 22 and connected to the second groove 22. Figure 3 As shown, the cross section of the second shallow groove 32 is a rounded rectangle with a groove depth of 1 mm, a groove width of 2 mm, and a fillet radius of 0.5 mm; Figure 4 As shown, the third shallow groove 33 has a depth of 1 mm and a width of 1 mm, and the interval between each two third shallow grooves 33 is 1 mm. The local cross section within the first profile is wavy as a whole, and each wave is a semicircle with a radius of 0.5 mm; Figure 2 As shown, the third and fourth shallow grooves 43 and 44 have an inverted arch-shaped cross-section, with a depth of 1mm and a width of 1mm. The lower half of the third and fourth shallow grooves 43 and 44 is a semicircle with a radius of 0.5mm. The first profile inner pattern design prevents air from being trapped by the grooves when the tread contacts the ground, reducing the number of closed grooves when the tread blocks touch the ground, thereby reducing resonance and noise. Furthermore, the wavy structure effectively breaks up the water film on wet or flooded roads, allowing the tire to maintain contact with the road and produce excellent grip, ensuring driving safety.

[0034] The second shallow groove 32 extends to the left and right sides respectively to form a first secondary shallow groove 41 and a second secondary shallow groove 42; the first secondary shallow groove 41 and the second secondary shallow groove 42 are quadrilaterals, the first secondary shallow groove 41 is close to the sixth end point, and the second secondary shallow groove 42 is close to the third end point; Figure 2 As shown, the cross-section of the first and second shallow grooves 41, 42 is inverted arch shape, with a groove depth of 1 mm and a groove width of 1 mm. The lower half of the first and second shallow grooves 41, 42 is a semicircle with a semicircle radius of 0.5 mm.

[0035] The pattern on the fourth pattern block 14 and the pattern on the second pattern block 11 are centrally symmetrical to each other.

[0036] The third pattern block 13 is a central pattern block, and the third pattern block 13 is provided with a circumferentially arranged fourth annular shallow groove 34, such as Figure 2 As 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 semicircle with a semicircle radius of 0.5 mm.

[0037] like Figure 5 As shown, the first groove 21 and the fourth groove 24 are bilaterally symmetrical, and the groove bottoms are both rounded; Figure 5 As shown, the first 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; Figure 5 As shown, the fourth 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.

[0038] like Figure 5 As shown, the second groove 22 and the third groove 23 are bilaterally symmetrical, and the groove bottoms are both rounded; Figure 5 As shown, the second groove 22 has a groove depth of 18 mm, a groove width of 12 mm, a chamfer depth of 3 mm, a groove wall on the left side inclined 19° from the center, and a groove wall on the right side inclined 13° from the center; Figure 5 As shown, the third groove 23 has a depth of 18 mm, a width of 12 mm, and 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. The radius of the circle tangent to the groove wall in the fillet is 5 mm.

[0039] <Noise performance>

[0040] 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 noise simulation analysis was carried out at a speed of 80 km / h.

[0041] Test objects: tires described in the reference example and embodiment 1, the tires are of the same specifications, and the tire pattern used in the reference example is as follows Figure 6 shown.

[0042] The test results are shown in Table 1.

[0043] Table 1

[0044] Reference example Example 1 Tire tread saturation (%) 72.57 72.80 Noise (dB) 71 70

[0045] The above is a description of the embodiments of the present invention. The above description of the disclosed embodiments will enable professionals in the field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals in the field. 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 the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tire pattern structure for reducing noise, the tire pattern structure comprising five alternately arranged pattern blocks and four pattern grooves, arranged transversely along the tire tread, the five pattern blocks comprising, from left to right, a first pattern block (11), a second pattern block (12), a third pattern block (13), a fourth pattern block (14) and a fifth pattern block (15), and the four pattern grooves comprising, from left to right, a first pattern groove (21), a second pattern groove (22), a third pattern groove (23) and a fourth pattern groove (24); characterized in that, The first pattern block (11) and the fifth pattern block (15) are shoulder pattern blocks; A plurality of first profiles are provided at intervals on the right circumference of the second pattern block (12), the first profile extending from the second pattern groove (22) to the first pattern groove (21) and forming a deformed and tilted inverted "Z" shape, wherein the oblique line in the middle of the "Z" shape is deformed to be perpendicular to the two horizontal lines, and a first shallow groove (31) is provided around the outer ring of the first profile; The first shallow groove (31) includes a first endpoint, a second endpoint, a third endpoint, a fourth endpoint, a fifth endpoint and a sixth endpoint connected in sequence, the second endpoint is connected to the first pattern groove (21), the fifth endpoint is connected to the second pattern groove (22), and the remaining endpoints are all located inside the second pattern block (12), and the first endpoint and the fourth endpoint are located on the same circumferential loop line; a circumferentially arranged second shallow groove (32) is provided inside the first profile, and the second shallow groove (32) connects the first endpoint, the sixth endpoint, the third endpoint and the fourth endpoint in sequence, and connects the first endpoint The shallow grooves at the first point, the second end point, and the third end point form a first triangle, and the shallow grooves connecting the fourth end point, the fifth end point, and the sixth end point form a second triangle. A plurality of circumferentially arranged third shallow grooves (33) are further provided inside the first profile; a third auxiliary shallow groove (43) is provided at the third end point of the first shallow groove (31) extending toward the first pattern groove (21) and communicating with the first pattern groove (21); a fourth auxiliary shallow groove (44) is provided at the sixth end point of the first shallow groove (31) extending toward the second pattern groove (22) and communicating with the second pattern groove (22); The second shallow groove (32) is extended to the left and right sides respectively to form a first auxiliary shallow groove (41) and a second auxiliary shallow groove (42); the first auxiliary shallow groove (41) extends from the second shallow groove (32) to the inside of the first triangle, and the second auxiliary shallow groove (42) extends from the second shallow groove (32) to the inside of the second triangle. The first auxiliary shallow groove (41) and the second auxiliary shallow groove (42) respectively form a quadrilateral with the second shallow groove (32), the first auxiliary shallow groove (41) is close to the sixth end point, and the second auxiliary shallow groove (42) is close to the third end point; The pattern on the fourth pattern block (14) and the pattern on the second pattern block (11) are centrally symmetrical to each other; The third pattern block (13) is a central pattern block, and the third pattern block (13) is provided with a circumferentially arranged annular fourth shallow groove (34).

2. The tire tread structure according to claim 1, characterized in that: The cross section of the first shallow groove (31), the fourth shallow groove (34), the first auxiliary shallow groove (41), the second auxiliary shallow groove (42), the third auxiliary shallow groove (43) or the fourth auxiliary shallow groove (44) is in the shape of an inverted arch, with a groove depth of 1 mm and a groove width of 1 mm, and the lower half of the cross section is a semicircle with a semicircle radius of 0.5 mm; The cross section of the second shallow groove (32) is a rounded rectangular shape with a groove depth of 1 mm, a groove width of 2 mm, and a fillet radius of 0.5 mm; The third shallow groove (33) has a groove depth of 1 mm and a groove width of 1 mm.

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

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

5. The tire tread structure according to claim 4, characterized in that: The radius of the circle where the rounded corners are located is 5mm.

6. An all-steel tire, characterized in that: The tread pattern of the all-steel tire adopts the tire pattern structure described in any one of claims 1 to 5.

Images