An irregular tire pattern structure for noise reduction

Abstract

The present invention relates to the technical field of tire tread design, disclosing an irregular tire pattern structure for noise reduction. The tire pattern 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, dense shallow grooves, all of which are interconnected with the tread grooves. The shallow grooves are only 1 mm wide and 1 mm deep. This design prevents air from being trapped when the tread contacts the ground, reduces the number of grooves closed when the tread blocks touch the ground, and thus reduces resonance and noise. Furthermore, the wavy structure formed by the parallel, dense 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.

Description

Technical Field

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

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

[0007] An irregular noise reduction tire pattern structure, comprising five alternating tread blocks and four tread grooves arranged transversely along the tire tread, wherein the five tread blocks comprise, 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 comprise, 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 and is an irregular shape with wide ends and narrow in the middle. The upper profile of the first profile is a downwardly concave curve, and the lower profile of the first profile is an upwardly convex curve. A first shallow groove is provided around the outer circle of the first profile.

[0010] The first shallow groove includes a first end, a second end, a third end, and a fourth end connected in sequence, the first end and the fourth end being connected to the first tread groove, and the second end and the third end being connected to the second tread groove; a plurality of circumferentially arranged third shallow grooves are provided within the first profile, and a curved second shallow groove is provided within the first profile, the second shallow groove dividing the third shallow groove into upper and lower portions;

[0011] The pattern on the fourth pattern block is centrally symmetrical to the pattern on the second pattern block;

[0012] The third pattern block is a central pattern block, and the third pattern block is provided with a circumferentially arranged annular fourth shallow groove.

[0013] Preferably, the cross section of the first shallow groove, the second shallow groove or the fourth 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;

[0014] The third shallow groove has a depth of 1 mm and a width of 1 mm.

[0015] 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.

[0016] 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.

[0017] Furthermore, the present invention also discloses an all-steel tire, the tread pattern of which adopts the tire pattern structure.

[0018] 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 1mm wide and 1mm deep. This design prevents air from being trapped when the tread contacts the ground, reduces the number of closed grooves when the tread blocks touch the ground, and thus reduces 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

[0019] Figure 1 Schematic diagram of tire pattern structure.

[0020] Figure 2 BB cross-sectional schematic diagram of the first shallow groove, the second shallow groove or the fourth shallow groove.

[0021] Figure 3 It is a schematic diagram of the local AA cross section of the first contour.

[0022] Figure 4 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.

[0023] Figure 5 Schematic diagram of the tire tread structure for the reference example. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] The following examples are combined Figures 1-4 illustrate.

[0027] like Figure 1 As shown, an irregular noise reduction tire pattern structure includes 5 alternating tread blocks and 4 tread grooves, which are arranged laterally along the tire tread. The 5 tread blocks 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 from left to right, and the 4 tread grooves include a first tread groove 21, a second tread groove 22, a third tread groove 23 and a fourth tread groove 24 from left to right.

[0028] The first block 11 and the fifth block 15 are shoulder blocks.

[0029] The right side of the second tread block 12 is circumferentially provided with a plurality of first profiles arranged at intervals. The first profile extends from the second groove 22 to the first groove 21 and is an irregular shape with wide ends and narrow in the middle. The upper profile of the first profile is a downward concave curve, and the lower profile of the first profile is an upward convex curve. A first shallow groove 31 is arranged around the outer circle of the first profile, as shown in FIG. 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.

[0030] The first shallow groove 31 includes a first end, a second end, a third end and a fourth end connected in sequence, the first end and the fourth end are connected to the first pattern groove 21, and the second end and the third end are connected to the second pattern groove 22; a plurality of circumferentially arranged third shallow grooves 33 are provided in the first profile, and a curved second shallow groove 32 is provided inside the third profile, and the second shallow groove 32 separates the third shallow groove 33 into two upper and lower parts.

[0031] like Figure 2 As shown, the cross section of the second shallow groove 32 is an inverted arch shape, with a groove depth of 1mm and a groove width of 1mm. The lower half of the second shallow groove 32 is a semicircle with a semicircle radius of 0.5mm. Figure 3As shown, the third shallow grooves 33 have a depth of 1mm and a width of 1mm, with a 1mm gap between each third shallow groove 33. The partial cross-section within the first profile is wavy, with each wave forming a semicircle with a radius of 0.5mm. The pattern design within the first profile 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.

[0032] The pattern on the fourth pattern block 14 and the pattern on the second pattern block 11 are centrally symmetrical to each other.

[0033] 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.

[0034] like Figure 4 As shown, the first groove 21 and the fourth groove 24 are bilaterally symmetrical, and the groove bottoms are both rounded; Figure 4 As shown in (A), the first groove 21 has a depth of 18 mm and a width of 13 mm, with the left groove wall inclined 18°50′ from the center and the right groove wall inclined 13°10′ from the center; Figure 4 As shown in (D), 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.

[0035] like Figure 4 As shown, the second groove 22 and the third groove 23 are bilaterally symmetrical, and the groove bottoms are both rounded; Figure 4 As shown in (B), the second groove 22 has a groove depth of 18 mm, a groove width of 12 mm, a fillet depth of 3 mm, a groove wall on the left side tilted 19° from the center, and a groove wall on the right side tilted 13° from the center; Figure 4 As shown in Figure (C), the third groove 23 has a depth of 18mm, a width of 12mm, and a 3mm rounded corner. The left groove wall is tilted 13° from the center, and the right groove wall is tilted 19° from the center. The radius of the circle tangent to the groove wall in the rounded corner is 5mm.

[0036] <Noise performance>

[0037] 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.

[0038] 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 5 shown.

[0039] The test results are shown in Table 1.

[0040] Table 1

[0041] Reference example Example 1 Tire tread saturation (%) 72.57 75.60 Noise (dB) 71 70

[0042] 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. An irregular noise reduction tire pattern structure, 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 side of the second pattern block (12), the first profile extending from the second pattern groove (22) to the first pattern groove (21), and being an irregular shape with wide ends and narrow in the middle, the profile on one side of the circumferential direction of the first profile being a curve concave toward the other side of the circumferential direction, and the profile on the other side of the circumferential direction of the first profile being a curve convex toward one side of the circumferential direction, and a first shallow groove (31) being provided around the outer circle of the first profile; the concave portion of the profile on one side is close to the first pattern groove (21), and the convex portion of the profile on the other side is close to the second pattern groove (22); The first shallow groove (31) includes a first end, a second end, a third end, and a fourth end connected in sequence, the first end and the fourth end are connected to the first pattern groove (21), and the second end and the third end are connected to the second pattern groove (22); the shallow groove connecting the first end and the second end forms a one-side profile, and the shallow groove connecting the third end and the fourth end forms the other-side profile, a plurality of circumferentially arranged third shallow grooves (33) are provided in the first profile, a curved second shallow groove (32) is provided inside the first profile, and the second shallow groove (32) divides the third shallow groove (33) into two parts in the circumferential direction; the curved second shallow groove (32) has a convex shape toward one side in the circumferential direction; 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 second shallow groove (32) or the fourth shallow groove (34) 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 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 arc included in the rounded corner is 5 mm.

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.

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