A large block pattern tire provided with a steel sheet groove

Abstract

The present application relates to the technical field of tire manufacturing, and discloses a large block pattern tire provided with a steel sheet groove, which comprises a tread, wherein the tread is provided with a steel sheet groove, a block and a main groove, the main groove is arranged between the blocks, and the steel sheet groove is arranged on the block; the steel sheet groove is symmetrical, the profiles on both sides of the steel sheet groove are mirror images, the two ends of any side profile are equal-length straight lines, the straight lines at the two ends are connected by a first curve, the first curve comprises two fillets and an arc, the two ends of the arc are connected to the corresponding straight lines through the fillets, and the opening of the arc faces the groove; the straight line profiles at the two ends of the steel sheet groove form straight grooves, and the first curve profile in the middle forms a circular groove, and the second cross section of the circular groove is in the shape of a trumpet mouth water drop; the design of the steel sheet groove of the tread can improve the heat dissipation performance, the grip, the anti-skid performance and the envelope performance on the road of the tire, can improve the ground pressure distribution and the driving comfort of the tire, and prolong the service life of the tire.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tire manufacturing technology, in particular to a large block pattern tire provided with steel sheet grooves. BACKGROUND

[0002] Tires are an important component of automobiles, and their performance directly affects the driving safety and comfort of the automobile. The tread is the main structure of the tire. However, traditional tires have some problems, such as poor heat generation performance, insufficient grip, etc.

[0003] In order to solve these problems, the existing technology mainly improves the performance of the tire by changing the material and structure design of the tire. For example, by changing the pattern design of the tire to improve the grip and drainage performance of the tire. However, it is difficult to make breakthroughs in these two aspects at present, and it requires a lot of research and development resources or manpower.

[0004] Although the existing technology has made some progress, there are still some problems and shortcomings, such as insufficient heat dissipation performance, further improved grip. In large block pattern tires such as mining tires, the application of steel sheets is less, but steel sheets can improve the rigidity of the tire surface, improve the grip and the inclusion of road obstacles of the tire, and improve the heat dissipation effect of the tire. However, how to design the steel sheet of the large block pattern tire so that it can improve the heat generation performance, grip performance and ground pressure distribution of the large block pattern tire is still a problem to be solved in tire design. SUMMARY

[0005] The present application provides a large block pattern tire provided with steel sheet grooves, which can improve the heat dissipation performance, grip, anti-skid performance and envelope performance of the tire, improve the ground pressure distribution and driving comfort of the tire, and prolong the service life of the tire.

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

[0007] A large block pattern tire provided with steel sheet grooves, comprising a tread, the tread is provided with steel sheet grooves, pattern blocks and pattern main grooves, the pattern main grooves are arranged between the pattern blocks, and the steel sheet grooves are arranged on the pattern blocks, the steel sheet grooves are symmetrical, the profiles on both sides of the steel sheet grooves are mirror images of each other, the two ends of any side profile are equal-length straight lines, the straight lines at both ends are connected by a first curve, the first curve includes two round corners and an arc, the two ends of the arc are connected to the corresponding straight lines through the round corners, and the opening of the arc faces the groove; the straight line profiles at both ends of the steel sheet groove form a straight groove, and the first curve profile in the middle forms a round groove.

[0008] The direction of the straight line where the line connecting the two ends of the steel sheet groove is located is the y direction, the median of the line connecting the two ends of the steel sheet groove is the x direction, the maximum length of the opening of the middle circular groove in the x direction is b, and the opening length of the two straight grooves is a, and b>a.

[0009] The first cross section of the straight groove in the x direction is in the shape of a water droplet, the bottom profile of the water droplet is in the shape of a circular arc, the two ends of the circular arc are connected by an arc line respectively, and the arc line is connected instead of a straight line because the arc line can further reduce the stress concentration of the tire during driving.

[0010] The second cross section of the circular groove in the x direction is in the shape of a water droplet with a horn mouth, that is, the bottom profile is in the shape of a circular arc, the two ends of the circular arc are connected by an arc line respectively, and the arc line is connected instead of a straight line because the arc line can further reduce the stress concentration of the tire during driving; the curve extends obliquely upward to the outside, and the two curves form a horn mouth, which can further improve the effective flow of gas or liquid in the steel sheet and improve the heat dissipation efficiency of the tire.

[0011] The diameters of the bottom circular arc of the first cross section and the bottom circular arc of the second cross section of the steel sheet groove are consistent.

[0012] As a preferred, the second curve on the second cross section is composed of multiple arc lines, forming a stepped horn mouth, which not only effectively improves the effective flow of gas or liquid in the steel sheet and improves the heat dissipation efficiency of the tire, but also further reduces the stress concentration of the tire during driving.

[0013] As a preferred, the horn mouth is double-layer stepped, the second curve on the second cross section constitutes the inner wall curve of the steel sheet groove, the arc line presented by the upper layer curve in the overhead direction is the arc line in the first curve in the middle of the steel sheet groove profile, and the radius of the arc line is 1-2.5 mm; the radius of the arc line presented by the lower layer curve in the overhead direction is 0.5 mm larger than that of the upper layer, and the lower layer arc line is inside the upper layer arc line.

[0014] As a preferred, the depth of the steel sheet groove is 28-35% of the main groove depth.

[0015] As a preferred, the main groove depth is 20-35 mm.

[0016] As a preferred, the range of b is a-8a.

[0017] As a preferred, the radius of the bottom circular arc of the first cross section and the second cross section is a / 2-2a.

[0018] As a preferred, the range of a is 0.5-3 mm.

[0019] As a preferred, the radius of the arc line in the first curve is 1-2.5 mm.

[0020] As preferred, the pattern main groove communicating the two sides of the pattern block at both ends of the steel sheet groove helps to further dissipate heat.

[0021] The tire steel sheet groove design of the present application can effectively improve the heat dissipation performance of the tire, avoid the temperature being too high when the tire is running at high speed, thereby prolonging the service life of the tire; can improve the tire grip, especially the performance on rainy days or wet road surface, effectively prevent the skidding phenomenon, and improve the driving safety; can relieve the rigidity of the tire tread, improve the ground pressure distribution of the tire, enhance the envelope performance of the tire on the debris on the poor road, and improve the driving comfort. And the design of the trumpet mouth in the steel sheet groove can further improve the heat dissipation performance of the tire. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic view of the cross section of A-A in the embodiment 1.

[0023] Figure 2 It is a schematic view of the cross section of B-B in the embodiment 1. Figure 1

[0024] Figure 3 It is a schematic view of the cross section of B-B in the embodiment 1. Figure 1

[0025] Figure 4 It is an enlarged schematic view of the steel sheet groove in the embodiment 1. Figure 1

[0026] Figure 5 It is a top view schematic view of the steel sheet groove of the present application.

[0027] Figure 6 It is a schematic view of the cross section of C-C in the embodiment 1. Figure 5 DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments will be described clearly and completely in combination with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0030] ​​​​A large block pattern tire provided with a steel sheet groove, comprising a tread, the tread is provided with a steel sheet groove, a block and a main groove, the main groove is arranged between the blocks, and the steel sheet groove is arranged on the block, the steel sheet groove is symmetrical, the profiles on both sides of the steel sheet groove are mirror images, the two ends of any side profile are equal-length straight lines, the straight lines at the two ends are connected by a first curve, the first curve comprises two fillets and an arc, the two ends of the arc are connected with the corresponding straight lines through the fillets, and the opening of the arc faces the groove Figure 5 . In some embodiments, the two ends of the steel sheet groove can communicate with the main grooves on both sides of the block Figure 1 , or one end of the steel sheet groove communicates with the main groove on one side of the block. In other embodiments, neither end of the steel sheet groove can communicate with the main grooves on both sides of the block. The steel sheet groove with both ends communicating with the main grooves on both sides of the block is the best design, which helps to further dissipate heat.

[0031] The straight line direction where the line connecting the two ends of the steel sheet groove is located is the y direction, the median line of the line connecting the two ends of the steel sheet groove is the x direction, the maximum opening length of the x direction of the middle circular groove of the steel sheet groove is b, and the opening length of the two straight grooves is a, b > a, and the range of a can be set to 0.5-3 mm.

[0032] In some embodiments, the radius of the arc in the first curve is 1-2.5 mm.

[0033] The first cross section of the straight groove in the x direction presents a water drop shape, the bottom profile of the water drop shape is a circular arc shape, and the two ends of the circular arc are connected with the straight line perpendicular to the bottom surface through an arc respectively.

[0034] The second cross section of the circular groove in the x direction is a horn-shaped water drop shape Figure 6 , that is, the bottom profile is a circular arc shape, and the two ends of the circular arc are connected with the second curve through an arc respectively, the curve extends obliquely upward outward, and the two curves form a horn shape.

[0035] The diameters of the bottom circular arc shapes of the first cross section and the second cross section of the steel sheet groove are consistent.

[0036] In some embodiments, the radius of the bottom circular arc of the first cross section and the second cross section is a / 2-2a.

[0037] In some embodiments, the range of b is a-8a.

[0038] In some embodiments, the depth of the steel sheet groove is 28-35% of the depth of the main groove, and the depth of the main groove is generally 20-35 mm.

[0039] In some embodiments, the trumpet mouth is stepped, i.e. the second curve on the second cross section is composed of multiple arcs, forming a stepped trumpet mouth, and the arcs form arc surfaces, and the wall surface of the trumpet mouth of the circular groove is composed of multiple arc surfaces. Specifically, the trumpet mouth can be double-layer stepped, can be three-layer stepped, or can be any multi-layer stepped. Specifically, from the cross-sectional view, the double-layer stepped trumpet mouth is composed of two arc surfaces connected in an upper and lower manner, as shown in Figure 3 , 4 From the top view, the arc line presented by the upper layer curve in the top direction is the arc line of the first curve in the middle of the steel sheet groove profile, and the radius of the arc line is 1-2.5 mm; the radius of the arc line presented by the lower layer curve in the top direction is 0.5 mm larger than that of the upper layer, and the lower layer arc line is inside the upper layer arc line.

[0040] Embodiment 1

[0041] In this embodiment, the large block flower tire tread is as shown in Figure 1 The pattern blocks extend from the center of the tread crown to the shoulder, and the curved pattern grooves are arranged between the upper and lower adjacent pattern blocks. Three crown steel sheet grooves 1 are arranged on each pattern block, and each steel sheet groove 1 is in communication with the pattern grooves on both sides of the pattern block. The middle steel sheet groove 1 is distributed along the center line of the tread, and the steel sheet grooves 1 on both sides form an angle of 0-90° with the center line. The steel sheet groove 1 is specifically as shown in Figure 1 , 4 .

[0042] The first cross section is specifically as shown in Figure 2 , and the overall shape is a water drop shape, the bottom profile of the water drop shape is a circular arc shape, and the two ends of the circular arc are connected to the straight line perpendicular to the bottom surface through an arc line.

[0043] The second cross section is specifically as shown in Figure 3 , and the overall shape is a trumpet mouth-shaped water drop shape, i.e. the bottom profile is a circular arc shape, and the two ends of the circular arc are connected to the second curve through an arc line, and the curve extends upward and outward, and the two curves form a trumpet mouth shape.

[0044] In this embodiment, the trumpet mouth is double-layer stepped, as shown in Figure 3 , 4 The second curve on the second cross section forms the inner wall curve surface of the steel sheet groove, and the trumpet mouth is connected by two arc surfaces. The arc line presented by the upper layer curve in the top direction is the arc line of the first curve in the middle of the steel sheet groove 1 profile, and the radius of the arc line is 1.5 mm; the radius of the arc line presented by the lower layer curve in the top direction is 2.0 mm larger than that of the upper layer.

[0045] The depth of the main pattern groove is set to 27 mm, the depth of the steel sheet groove 1 is set to 9 mm, a is set to 2 mm, and b is set to 8 mm. The bottom circular arc radius of the first cross section and the second cross section is 2 mm.

[0046] Comparative Example 1

[0047] The difference from Example 1 is that the cross section of the steel groove in the x direction is the first cross section at any position.

[0048] Comparative Example 2

[0049] The difference from Example 1 is that the steel groove is not provided.

[0050] The test is carried out using 12.00R20 size tires, sample 1 uses the steel groove design of Example 1, sample 2 uses the steel groove design of Comparative Example 1, and sample 3 uses the no steel groove design of Comparative Example 2. The tire is run at a speed of 50km / h under standard load, and the infrared temperature test data of the crown surface is recorded, as shown in Table 1.

[0051] Table 1

[0052] Time / min 30 60 90 120 150 180 210 240 270 300 Sample 1 (°C) 39.85 41.37 42.73 43.56 43.00 43.49 43.93 43.19 43.63 43.83 Sample 2 (°C) 41.48 43.58 45.15 48.78 48.20 48.47 49.58 49.73 48.75 49.58 Sample 3 (°C) 47.89 52.52 54.09 55.87 55.01 54.05 54.68 55.60 53.86 55.66 Time / min 330 360 390 420 450 480 510 540 570 600 Sample 1 (°C) 43.44 43.26 43.92 42.83 60.91 53.43 51.29 55.23 55.30 55.57 Sample 2 (°C) 48.60 49.56 50.70 50.58 66.28 58.45 53.64 59.28 58.05 60.08 Sample 3 (°C) 54.07 53.66 53.37 53.78 71.37 60.64 57.97 63.46 62.25 64.55 Time / min 650 700 751 801 851 901 951 1001 1051 1101 Sample 1 (°C) 55.34 57.60 54.67 56.50 55.25 57.31 55.16 57.12 55.37 55.89 Sample 2 (°C) 60.48 62.95 58.94 61.50 59.60 60.80 58.26 61.15 57.50 59.05 Sample 3 (°C) 63.43 66.95 61.16 64.65 61.95 63.52 61.44 66.16 60.58 62.73 Time / min 1151 1201 1251 1301 1351 1401 1451 1501 1550 1600 Sample 1 (°C) 54.89 55.81 54.93 55.84 56.59 54.21 56.87 56.72 57.51 57.41 Sample 2 (°C) 58.25 59.08 58.58 59.97 59.87 57.37 60.89 60.18 60.84 60.84 Sample 3 (°C) 61.61 63.04 61.62 63.12 62.96 60.53 64.91 64.45 64.17 63.76 Time / min 1650 1700 / / / / / / / / Sample 1 (°C) 57.04 57.92 / / / / / / / / Sample 2 (°C) 60.18 63.29 / / / / / / / / Sample 3 (°C) 64.91 67.43 / / / / / / / /

[0053] As can be seen from Table 1, the steel groove can improve the heat dissipation performance of the tire, and the steel groove with the bell mouth design has better heat dissipation effect.

[0054] The above describes the embodiments of the present application, and through the above description of the disclosed embodiments, the person skilled in the art can realize or use the present application. Various modifications to these embodiments will be apparent 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 application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A large block pattern tire provided with a steel sheet groove, comprising a tread on which a steel sheet groove, a block, and a main groove are provided, the main groove being provided between the blocks, the steel sheet groove being provided on the block, the steel sheet groove being of a symmetric type, characterized in that, The profiles on both sides of the steel sheet groove are mirror images of each other, the two ends of the profile on either side are equal-length straight lines, the straight lines at the two ends are connected by a first curve, the first curve comprises two fillets and an arc, the two ends of the arc are connected to the corresponding straight lines through the fillets, and the opening of the arc faces the groove; the straight line profiles at the two ends of the steel sheet groove form straight grooves, and the first curve profile in the middle forms a circular groove; The straight line direction of the connecting line at the two ends of the steel sheet groove is the y direction, the median line of the connecting line at the two ends of the steel sheet groove is the x direction, the maximum opening length of the circular groove in the middle of the steel sheet groove in the x direction is b, and the opening length of the straight grooves on both sides is a, b > a; The first cross section of the straight groove in the x direction presents a water drop shape, the bottom profile of the water drop shape is a circular arc shape, and the two ends of the circular arc are connected to the straight lines perpendicular to the bottom surface through arcs respectively; The second cross section of the circular groove in the x direction is a water drop shape with a horn mouth, that is, the bottom profile is a circular arc shape, the two ends of the circular arc are connected to a second curve through arcs respectively, the curve extends obliquely upward to the outside, and the two curves form a horn mouth; The diameters of the bottom circular arcs of the first cross section and the second cross section of the steel sheet groove are consistent; The second curve on the second cross section is composed of multiple arcs, forming a stepped horn mouth.

2. A large block pattern tire provided with a steel sheet groove according to claim 1, characterized in that, The horn mouth is double-stepped, the second curve on the second cross section forms the inner wall curve of the steel sheet groove, the arc presented by the upper curve in the top view direction is the arc in the first curve in the middle of the profile of the steel sheet groove, and the radius of the arc is 1-2.5 mm; the radius of the arc presented by the lower curve in the top view direction is 0.5 mm larger than that of the upper curve.

3. A large block pattern tire provided with a steel sheet groove according to any one of claims 1 to 2, characterized in that, The depth of the steel sheet groove is 28-35% of the main groove depth.

4. A large block pattern tire provided with a steel sheet groove according to claim 3, characterized in that, The main groove depth is 20-35 mm.

5. A large block pattern tire provided with a steel sheet groove according to any one of claims 1 to 2, characterized in that, The range of b is a-8a.

6. A large block pattern tire provided with a steel sheet groove according to any one of claims 1 to 2, characterized in that, The radius of the bottom circular arc of the first cross section and the second cross section is a / 2-2a.

7. A large block pattern tire provided with a steel sheet groove according to any one of claims 1 to 2, characterized in that, The range of a is 0.5-3 mm.

8. The large block tread pattern tire provided with a steel sheet groove according to claim 1, wherein The radius of the arc in the first curve is 1-2.5 mm.

9. A large block pattern tire provided with a steel sheet groove according to any one of claims 1 to 2, characterized in that, The steel sheet groove is connected to the main grooves on both sides of the pattern block at the two ends.

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