Pattern structure and radial tire

Abstract

The invention provides a pattern structure and a radial tire so as to meet the driving safety, comfort and controllability of an electric automobile. The pattern structure comprises a third pattern arranged on the third tread part; the third pattern comprises a plurality of first inclined grooves which are distributed in the circumferential direction of the radial tire at intervals, the first inclined grooves comprise a plurality of first groove units which are sequentially distributed in the circumferential direction of the radial tire, and each first groove unit comprises two first inclined grooves which are sequentially distributed in the circumferential direction of the radial tire; the two first inclined grooves of the first groove unit are respectively a second inclined groove and a second cutter groove; one end of the second inclined groove extends to the second longitudinal groove, and the other end of the second inclined groove and the third longitudinal groove are arranged at intervals; the groove width of the second inclined groove is gradually reduced in the direction from the connecting end of the second inclined groove to the free end of the second inclined groove; one end of the second cutter groove extends to the third longitudinal groove, and the other end of the second cutter groove and the second longitudinal groove are arranged at intervals.

Description

Technical Field

[0001] The present invention relates to the technical field of tires, and in particular to a pattern structure and a radial tire. Background Art

[0002] The power system and transmission system of new energy vehicles are quite different from those of traditional vehicles, which leads to different requirements for tires. There are very high requirements in terms of rolling resistance, lightweight, grip, wear resistance, noise, load-bearing capacity and other performance.

[0003] Ordinary tires commonly found on the market cannot fully take into account all the performance requirements. It is necessary to balance all the performance requirements according to the requirements of electric vehicles for tires to meet the driving safety, comfort and controllability of electric vehicles. Summary of the invention

[0004] The main purpose of the present invention is to provide a pattern structure and a radial tire to meet the driving safety, comfort and controllability of electric vehicles.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a pattern structure is provided, which is applied to a radial tire, wherein four longitudinal grooves of the pattern structure divide the tread of the radial tire into a first tread portion, a second tread portion, a third tread portion, a fourth tread portion, and a fifth tread portion which are arranged in sequence; the four longitudinal grooves include a first longitudinal groove, a second longitudinal groove, a third longitudinal groove, and a fourth longitudinal groove which are arranged in sequence; the pattern structure includes a third pattern arranged in the third tread portion; the third pattern includes a plurality of first oblique grooves spaced apart along the circumference of the radial tire The plurality of first oblique grooves include a plurality of first groove units sequentially distributed along the circumference of the radial tire, and the first groove unit includes two first oblique grooves sequentially distributed along the circumference of the radial tire; the two first oblique grooves of the first groove unit are respectively a second oblique groove and a second knife groove; one end of the second oblique groove extends to the second longitudinal groove, and the other end is spaced apart from the third longitudinal groove; the groove width of the second oblique groove gradually decreases from the connecting end to the free end of the second oblique groove; one end of the second knife groove extends to the third longitudinal groove, and the other end is spaced apart from the second longitudinal groove.

[0006] Furthermore, the free end of the second oblique groove is a pointed end.

[0007] Furthermore, both side walls of the second oblique groove are arc surfaces.

[0008] Furthermore, along the axial direction of the radial tire, the distance between the free end of the second oblique groove and the third longitudinal groove is W 10 The distance between the free end of the second sipe and the second longitudinal groove is W8, which is smaller than W 10 .

[0009] Furthermore, the pattern structure also includes a second pattern arranged on the second tread portion; the second pattern includes a plurality of fourth oblique grooves spaced apart along the circumference of the radial tire, the plurality of fourth oblique grooves include a plurality of second groove units sequentially distributed along the circumference of the radial tire, the second groove unit includes two fourth oblique grooves sequentially distributed along the circumference of the radial tire; the two fourth oblique grooves of the second groove unit are respectively a fifth oblique groove and a sixth oblique groove; the fifth oblique groove includes a first groove segment and a fourth knife groove, the first end of the first groove segment extends to the first longitudinal groove, the second end of the first groove segment is connected to the first end of the fourth knife groove, and the second end of the fourth knife groove extends to the second longitudinal groove; the sixth oblique groove includes a third groove segment and a first knife groove, the first end of the first knife groove extends to the first longitudinal groove, the second end of the first knife groove is spaced apart from the first end of the third groove segment, and the second end of the third groove segment extends to the second longitudinal groove.

[0010] Furthermore, the pattern structure also includes a fourth pattern arranged on the fourth tread portion; the fourth pattern includes a plurality of seventh oblique grooves spaced apart along the circumference of the radial tire, the plurality of seventh oblique grooves include a plurality of third groove units sequentially distributed along the circumference of the radial tire, the third groove unit includes two seventh oblique grooves sequentially distributed along the circumference of the radial tire; the two seventh oblique grooves of the third groove unit are respectively a third knife groove and a ninth oblique groove; one end of the third knife groove extends to the third longitudinal groove, and the other end of the third knife groove is spaced apart from the fourth longitudinal groove; the ninth oblique groove includes a fourth groove segment and a fifth groove segment, the first end of the fourth groove segment extends to the third longitudinal groove, and the second end of the fifth groove segment extends to the fourth longitudinal groove; the second end of the fourth groove segment is spaced apart from the first end of the fifth groove segment.

[0011] Further, along the extension direction of the fourth groove segment, the fourth groove segment includes a first groove segment and a second groove segment connected to each other, an end of the first groove segment away from the second groove segment is the first end of the fourth groove segment, and an end of the second groove segment away from the first groove segment is the second end of the fourth groove segment; the groove depth of the first groove segment is greater than the groove depth of the second groove segment.

[0012] Furthermore, the pattern structure also includes a first pattern arranged on the first tread portion; the first pattern includes a plurality of first transverse grooves spaced apart along the circumference of the radial tire; the first transverse groove includes a sixth groove segment and a fifth knife groove, the first end of the sixth groove segment extends toward the sidewall, the second end of the sixth groove segment is connected to the first end of the fifth knife groove, and the second end of the fifth knife groove extends to the first longitudinal groove.

[0013] Furthermore, the groove width of the sixth groove segment gradually increases from the first end to the second end of the sixth groove segment.

[0014] Further, along the groove width direction of the sixth groove segment, two ends of the sixth groove segment are respectively the third end and the fourth end, and the fifth grooving is connected to the fourth end of the sixth groove segment.

[0015] Furthermore, the pattern structure also includes a fifth pattern arranged on the fifth tread portion; the fifth pattern includes a plurality of second transverse grooves spaced apart along the circumferential direction of the radial tire; the plurality of second transverse grooves include a plurality of fourth groove units sequentially distributed along the circumference of the radial tire, the fourth groove unit includes two second transverse grooves sequentially distributed along the circumference of the radial tire; the two second transverse grooves of the fourth groove unit are respectively a third transverse groove and a fourth transverse groove; the first end of the third transverse groove is spaced apart from the fourth longitudinal groove, and the second end of the third transverse groove extends toward the sidewall; the fourth transverse groove includes a sixth knife groove and a ninth groove segment, the first end of the sixth knife groove extends to the fourth longitudinal groove, the second end of the sixth knife groove is connected to the first end of the ninth groove segment, and the second end of the ninth groove segment extends toward the sidewall.

[0016] Furthermore, the groove width of the third transverse groove gradually decreases from the first end to the second end of the third transverse groove.

[0017] Furthermore, the groove width of the ninth groove segment gradually decreases from the first end to the second end of the ninth groove segment.

[0018] Further, along the groove width direction of the ninth groove segment, two ends of the ninth groove segment are respectively the third end and the fourth end, and the sixth grooving is connected to the third end of the ninth groove segment.

[0019] Furthermore, the fifth pattern also includes a plurality of preset grooves spaced apart along the circumference of the radial tire, and the plurality of preset grooves are arranged one-to-one with the plurality of fourth groove units; the preset grooves include a tenth groove segment, an eleventh groove segment and a twelfth groove segment, the first end of the tenth groove segment is a free end, the second end of the tenth groove segment is spaced apart from the first end of the eleventh groove segment, the second end of the eleventh groove segment is spaced apart from the first end of the twelfth groove segment, and the second end of the twelfth groove segment is connected to the second end of the ninth groove segment of the corresponding fourth groove unit; the extension direction of the preset groove is arranged at an angle to the extension direction of the second transverse groove of the corresponding fourth groove unit; the second end of the third transverse groove is connected to the tenth groove segment of the corresponding preset groove.

[0020] Further, according to another aspect of the present invention, a radial tire is provided, which includes the above-mentioned pattern structure.

[0021] By applying the technical solution of the present invention, the pattern structure is optimized and improved to meet the driving safety, comfort and controllability of electric vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 A schematic structural diagram of an embodiment of a pattern structure according to the present invention is shown;

[0024] Figure 2 Shows Figure 1 A schematic diagram of the structure of the first transverse groove of the pattern structure;

[0025] Figure 3 Shows Figure 1 A schematic structural diagram of a fourth oblique groove of the pattern structure;

[0026] Figure 4 Shows Figure 1 A schematic structural diagram of a first oblique groove of the pattern structure;

[0027] Figure 5 Shows Figure 1 A schematic diagram of the structure of the seventh oblique groove of the pattern structure;

[0028] Figure 6 Shows Figure 1 A schematic diagram of the structure of the second transverse groove and the preset groove of the pattern structure;

[0029] Figure 7 Shows Figure 1 A cross-sectional view of CC of the second oblique groove of the pattern structure;

[0030] Figure 8 Shows Figure 1 Cross-sectional view of BB of the fourth groove segment of the pattern structure.

[0031] The above drawings include the following reference numerals:

[0032] 111, first longitudinal groove; 112, second longitudinal groove; 113, third longitudinal groove; 114, fourth longitudinal groove;

[0033] 20, fourth oblique groove; 21, first groove section; 22, fourth grooving; 221, third cutting angle; 23, third groove section; 24, first grooving;

[0034] 30, first oblique groove; 31, second oblique groove; 311, first cutting angle; 32, second grooving; 321, second cutting angle;

[0035] 40, seventh oblique groove; 41, third sipe; 411, fourth cutting angle; 42, fourth groove section; 421, first groove section; 422, second groove section; 423, second end wall; 43, fifth groove section;

[0036] 50, second transverse groove; 51, third transverse groove; 511, fifth cutting angle; 52, sixth grooving groove; 521, ninth cutting angle; 53, ninth groove segment; 531, sixth cutting angle; 54, preset groove; 541, tenth groove segment; 542, eleventh groove segment; 543, twelfth groove segment;

[0037] 61, first tread portion; 62, second tread portion; 63, third tread portion; 64, fourth tread portion; 65, fifth tread portion;

[0038] 70, first transverse groove; 71, sixth groove segment; 711, seventh cutting angle; 72, fifth sipe; 721, eighth cutting angle. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] The present invention provides a pattern structure, which is applied to radial tires, please refer to Figures 1 to 8 The pattern structure includes four longitudinal grooves arranged at intervals along the axial direction of the radial tire. Each longitudinal groove is extended along the circumferential direction of the radial tire and connected end to end. The four longitudinal grooves include a first longitudinal groove 111, a second longitudinal groove 112, a third longitudinal groove 113 and a fourth longitudinal groove 114 which are arranged in sequence.

[0043] The four longitudinal grooves divide the tread of the radial tire into a first tread portion 61 , a second tread portion 62 , a third tread portion 63 , a fourth tread portion 64 , and a fifth tread portion 65 which are arranged in sequence.

[0044] In the present application, the pattern structure includes a third pattern arranged on the third tread portion 63; the third pattern includes a plurality of first oblique grooves 30 spaced apart along the circumference of the radial tire to form a third pattern block on the third tread portion 63, and the third pattern block is a middle pattern block.

[0045] The multiple first oblique grooves 30 include multiple first groove units distributed in sequence along the circumference of the radial tire, and the first groove unit includes two adjacent first oblique grooves 30 distributed in sequence along the circumference of the radial tire; the two first oblique grooves 30 of the first groove unit are respectively a second oblique groove 31 and a second grooving 32.

[0046] One end of the second oblique groove 31 extends to the second longitudinal groove 112, and the other end is spaced apart from the third longitudinal groove 113. One end of the second sipe 32 extends to the third longitudinal groove 113, and the other end is spaced apart from the second longitudinal groove 112.

[0047] The two ends of the first oblique groove 30 are a connecting end and a free end respectively; and the groove width of the second oblique groove 31 gradually decreases from the connecting end to the free end.

[0048] Optionally, the free end of the first oblique groove 30 is a pointed end.

[0049] Specifically, the extension directions of the plurality of second sipes 32 are all parallel.

[0050] Optionally, along the groove width direction of the second oblique groove 31 , the second oblique groove 31 has two groove side walls; both groove side walls of the second oblique groove 31 are arc surfaces.

[0051] Optionally, relative to the central axis of the radial tire, the inclination angle α of the second oblique groove 31 ranges from 25 degrees to 30 degrees.

[0052] Optionally, relative to the central axis of the radial tire, the inclination angle β of the second sipe 32 ranges from 20 degrees to 25 degrees.

[0053] Optionally, α-β=5°. In this way, the rigidity of the inner side of the central pattern block can be ensured to be less than that of the outer side, the support of the outer pattern block can be ensured, the drainage of the inner side of the pattern can be improved to a certain extent, the dry and wet performance of the tire can be ensured, and the product safety can be improved.

[0054] Optionally, a first cut angle 311 is set on a groove side wall of the second oblique groove 31, and the angle of the first cut angle 311 is 45 degrees, that is, Figure 7 The angle e in the middle is 45 degrees. By setting the first cut angle 311, the rigidity of the middle pattern block of the tire can be ensured, and the wetland drainage of the tire can be increased at the same time.

[0055] Optionally, along the groove width direction of the second groove 32, the second groove 32 has two groove side walls; one groove side wall of the second groove 32 is beveled, that is, one groove side wall of the second groove 32 is provided with a second cutting angle 321, and the angle of the second cutting angle 321 is 45 degrees.

[0056] Specifically, along the axial direction of the radial tire, the width of the third tread portion 63 is W6, and the distance between the free end of the second oblique groove 31 and the third longitudinal groove 113 is W. 10 The distance between the free end of the second knife groove 32 and the second longitudinal groove 112 is W8, and the distance between the free end of the second knife groove 32 and the third longitudinal groove 113 is W9.

[0057] Optionally, W8 is less than W 10 In this way, the central rigidity of the middle tread block can be guaranteed to be greater, and the center area of ​​the ground contact can maintain a higher sense of center during steering, thereby improving the handling of the tire.

[0058] Optionally, W 10 =K1*W6; the value range of K1 is 0.42 to 0.46.

[0059] Optionally, W9=K2*W6; the value range of K2 is 0.64 to 0.68; W8=K3*W6; the value range of K3 is 0.36 to 0.62.

[0060] The second oblique grooves 31 and the second sipes 32 are arranged alternately to ensure balanced pressure in the contact area of ​​the central tread block, thereby improving the driving stability and handling performance of the tire.

[0061] In the present application, the pattern structure further includes a second pattern provided on the second tread portion 62 .

[0062] The second pattern includes a plurality of fourth oblique grooves 20 spaced apart in the circumferential direction of the radial tire to form a second pattern block on the second tread portion 62 , and the second pattern block is an inner crown pattern block.

[0063] The multiple fourth oblique grooves 20 include multiple second groove units distributed in sequence along the circumference of the radial tire, and the second groove unit includes two adjacent fourth oblique grooves 20 distributed in sequence along the circumference of the radial tire; the two fourth oblique grooves 20 of the second groove unit are respectively the fifth oblique groove and the sixth oblique groove.

[0064] The fifth oblique groove includes a first groove segment 21 and a fourth groove 22 . The first end of the first groove segment 21 extends to the first longitudinal groove 111 , the second end of the first groove segment 21 is connected to the first end of the fourth groove 22 , and the second end of the fourth groove 22 extends to the second longitudinal groove 112 .

[0065] The sixth oblique groove includes a third groove segment 23 and a first grooving groove 24 . The first end of the first grooving groove 24 extends to the first longitudinal groove 111 . The second end of the first grooving groove 24 is spaced apart from the first end of the third groove segment 23 . The second end of the third groove segment 23 extends to the second longitudinal groove 112 .

[0066] Specifically, the extension directions of the plurality of fourth oblique grooves 20 are all parallel.

[0067] Specifically, the extending direction of the first groove segment 21 is the same as the extending direction of the fifth oblique groove, and the extending direction of the fourth siping 22 is the same as the extending direction of the fifth oblique groove.

[0068] Specifically, the extending direction of the third groove segment 23 is the same as the extending direction of the sixth oblique groove, and the extending direction of the first siping 24 is the same as the extending direction of the sixth oblique groove.

[0069] Optionally, a third cutting angle 221 is set on a groove sidewall of the fourth sipe 22; the angle of the third cutting angle 221 is 45 degrees. In this way, not only the contact area between the tire and the ground is increased, but also the effect of the tire tread blocks cutting the water film is improved, providing stronger grip on slippery roads.

[0070] Optionally, relative to the central axis of the radial tire, the inclination angle δ of the fourth oblique groove 20 ranges from 25 degrees to 31 degrees. For example, δ is 28 degrees.

[0071] Specifically, along the axial direction of the radial tire, the width of the second tread portion 62 is W5, and the distance between the second end of the first groove segment 21 and the first longitudinal groove 111 is W. 18 The distance between the second end of the first groove segment 21 and the second longitudinal groove 112 is W 28 , that is, the distance between the first end of the fourth sipe 22 and the second longitudinal groove 112 is W 28 The distance between the first end of the third groove segment 23 and the second longitudinal groove 112 is W 17 The distance between the second end of the first sipe 24 and the first longitudinal groove 111 is W 27 .

[0072] Optionally, W 18 =W 28 ; W 18 =0.5W5;W 28 =0.5W5.

[0073] Optionally, W 17 =W 27 ; W 17 =1 / 3W5;W 27 =1 / 3W5.

[0074] The fifth oblique groove and the sixth oblique groove are arranged alternately to ensure that the pressure in the contact surface of the inner crown pattern block is balanced.

[0075] In the present application, the pattern structure further includes a fourth pattern provided on the fourth tread portion 64 .

[0076] The fourth pattern includes a plurality of seventh oblique grooves 40 spaced apart in the circumferential direction of the radial tire to form a fourth block on the fourth tread portion 64 , the fourth block being an outer crown block.

[0077] The multiple seventh oblique grooves 40 include multiple third groove units distributed in sequence along the circumference of the radial tire, and the third groove unit includes two adjacent seventh oblique grooves 40 distributed in sequence along the circumference of the radial tire; the two seventh oblique grooves 40 of the third groove unit are respectively the third knife groove 41 and the ninth oblique groove.

[0078] One end of the third sipe 41 extends to the third longitudinal groove 113 , and the other end of the third sipe 41 is spaced apart from the fourth longitudinal groove 114 .

[0079] The ninth oblique groove includes a fourth groove segment 42 and a fifth groove segment 43 . The first end of the fourth groove segment 42 extends to the third longitudinal groove 113 , and the second end of the fifth groove segment 43 extends to the fourth longitudinal groove 114 . The second end of the fourth groove segment 42 is spaced apart from the first end of the fifth groove segment 43 .

[0080] Specifically, the extension directions of the plurality of seventh oblique grooves 40 are all parallel.

[0081] Specifically, the extending direction of the fourth groove segment 42 is the same as the extending direction of the ninth oblique groove, and the extending direction of the fifth groove segment 43 is the same as the extending direction of the ninth oblique groove.

[0082] Optionally, the first end surface of the fifth groove segment 43 is an arc-shaped surface.

[0083] Optionally, both groove side walls of the third grooving groove 41 are provided with a fourth cutting angle 411 , and the angle of the fourth cutting angle 411 is 45 degrees.

[0084] Optionally, the inclination angle of the fourth oblique groove 20 is the same as the inclination angle of the seventh oblique groove 40 with respect to the central axis of the radial tire.

[0085] Optionally, relative to the central axis of the radial tire, the inclination angle θ of the seventh oblique groove 40 ranges from 25 degrees to 31 degrees. For example, θ is 28 degrees.

[0086] Specifically, along the axial direction of the radial tire, the width of the fourth tread portion 64 is W7, and the distance between the free end of the third sipe 41 and the fourth longitudinal groove 114 is W. 11The distance between the free end of the fourth groove segment 42 and the third longitudinal groove 113 is W 12 The distance between the free end of the fifth groove segment 43 and the fourth longitudinal groove 114 is W 14 .

[0087] Optionally, W 11 =0.75W7;W 12 =2 / 3W7;W 14 =1 / 5W7.

[0088] Optionally, along the extension direction of the fourth groove segment 42, the fourth groove segment 42 includes a first groove segment 421 and a second groove segment 422 connected to each other, an end of the first groove segment 421 away from the second groove segment 422 is the first end of the fourth groove segment 42, and an end of the second groove segment 422 away from the first groove segment 421 is the second end of the fourth groove segment 42; the groove depth of the first groove segment 421 is greater than the groove depth of the second groove segment 422.

[0089] For example, the difference between the groove depth of the first groove section 421 and the groove depth of the second groove section 422 is d, and d is 1.5 mm.

[0090] Optionally, the second end wall 423 of the fourth groove segment 42 is arranged at an obtuse angle with the tread. For example, the angle f between the second end wall 423 of the fourth groove segment 42 and the tread is 115 degrees.

[0091] Optionally, a circular chamfer is provided between the bottom wall of the second groove segment 422 and the second end wall 423 of the fourth groove segment 42, and the radius of the circular chamfer is 4 mm.

[0092] This application increases the overall rigidity of the outer crown pattern, providing strong grip, especially on dry roads. The outer pattern has better support when turning, effectively preventing deformation of the crown when turning at high speed and reducing the risk of skidding.

[0093] like Figure 1 , Figures 3 to 5 As shown, the free end of the second oblique groove 31 is located on the upper side of its connection end, and the connection end of the second groove 32 is located on the upper side of its free end; the second end of the first groove segment 21 is located on the upper side of its first end, and the second end of the fourth groove 22 is located on the upper side of its first end; the second end of the third groove segment 23 is located on the upper side of its first end, and the second end of the first groove 24 is located on the upper side of its first end; the free end of the third groove 41 is located on the upper side of its connection end; the second end of the fourth groove segment 42 is located on the upper side of its first end, and the second end of the fifth groove segment 43 is located on the upper side of its first end. The same inclination direction can reduce noise to a certain extent and improve comfort.

[0094] Optionally, θ is greater than β; the difference between θ and β ranges from 4 to 8 degrees. For example, θ-β = 6 degrees. Optionally, δ is greater than β; the difference between δ and β ranges from 4 to 8 degrees. For example, δ-β = 6 degrees. The rigidity matching of the center tread block, the outer crown tread block and the inner crown tread block can be further optimized. When the groove angle is larger, the length of the groove becomes longer, the tread block is cut into smaller pieces, and the rigidity of the tread block becomes smaller. The β angle setting ensures that the rigidity of the center tread block is maximized and that the center sense is strong during tire steering control. Table 1 shows a comparison of tire performance at different values ​​of θ-β or δ-β.

[0095] Table 1

[0096] θ-β or δ-β Comfort noise Dry handling -12 98 98 96 -8 100 97 102 -4 97 98 101 0 100 100 100 4 105 107 103 8 104 105 102 12 105 106 98

[0097] In the present application, the pattern structure also includes a first pattern arranged on the first tread portion 61; the first pattern includes a plurality of first transverse grooves 70 distributed at intervals along the circumference of the radial tire to form a first pattern block on the first tread portion 61, and the first pattern block is an inner shoulder pattern block.

[0098] The first transverse groove 70 includes a sixth groove segment 71 and a fifth sipe 72 . The first end of the sixth groove segment 71 extends toward the sidewall, the second end of the sixth groove segment 71 is connected to the first end of the fifth sipe 72 , and the second end of the fifth sipe 72 extends to the first longitudinal groove 111 .

[0099] Optionally, the groove width of the sixth groove segment 71 gradually increases from the first end to the second end of the sixth groove segment 71 .

[0100] Optionally, both groove side walls of the sixth groove segment 71 are provided with a seventh cut corner 711 , and the angle of the seventh cut corner 711 is 45 degrees.

[0101] Optionally, a groove side wall of the fifth knife groove 72 is provided with an eighth cutting angle 721, and the angle of the eighth cutting angle 721 is 45 degrees.

[0102] Optionally, along the groove width direction of the sixth groove segment 71, the two ends of the sixth groove segment 71 are respectively the third end and the fourth end, and the fifth grooving 72 is connected to the fourth end of the sixth groove segment 71. Figure 1 and Figure 2 As shown, the fifth sipe 72 is connected to the lower end of the sixth groove segment 71 .

[0103] Optionally, the first transverse groove 70 is arranged obliquely relative to the central axis of the radial tire. Figure 1 and Figure 2 As shown, the left end of the first transverse groove 70 is located above the right end thereof.

[0104] Optionally, relative to the central axis of the radial tire, the inclination angle γ of the first transverse groove 70 ranges from 3 degrees to 7 degrees. For example, γ is 5 degrees.

[0105] Optionally, along the axial direction of the radial tire, the distance W between the second end of the sixth groove segment 71 and the first longitudinal groove 111 is 16 The value range of W is 5 mm to 7 mm; for example, 16 It is 6mm.

[0106] In the present application, the pattern structure further includes a fifth pattern provided in the fifth tread portion 65 .

[0107] The fifth pattern includes a plurality of second lateral grooves 50 spaced apart in the circumferential direction of the radial tire to form a fifth block on the fifth tread portion 65 , and the fifth block is an outer shoulder block.

[0108] The multiple second transverse grooves 50 include multiple fourth groove units distributed in sequence along the circumference of the radial tire, and the fourth groove unit includes two adjacent second transverse grooves 50 distributed in sequence along the circumference of the radial tire; the two second transverse grooves 50 of the fourth groove unit are respectively the third transverse groove 51 and the fourth transverse groove.

[0109] The first end of the third lateral groove 51 is spaced apart from the fourth longitudinal groove 114 , and the second end of the third lateral groove 51 extends toward the sidewall.

[0110] The fourth transverse groove includes a sixth sipe 52 and a ninth groove segment 53. The first end of the sixth sipe 52 extends to the fourth longitudinal groove 114. The second end of the sixth sipe 52 is connected to the first end of the ninth groove segment 53. The second end of the ninth groove segment 53 extends toward the sidewall.

[0111] Optionally, the width of the third transverse groove 51 gradually decreases from the first end to the second end of the third transverse groove 51 .

[0112] Optionally, the groove width of the ninth groove segment 53 gradually decreases from the first end to the second end of the ninth groove segment 53 .

[0113] Optionally, along the groove width direction of the ninth groove segment 53, the two ends of the ninth groove segment 53 are respectively the third end and the fourth end, and the sixth grooving 52 is connected to the third end of the ninth groove segment 53. Figure 1 and Figure 6 As shown, the sixth sipe 52 is connected to the upper end of the ninth groove segment 53 .

[0114] Optionally, both groove side walls and the first end wall of the third transverse groove 51 are provided with a fifth cut angle 511 , and the angle of the fifth cut angle 511 is 45 degrees.

[0115] Optionally, both groove side walls and the first end wall of the ninth groove segment 53 are provided with a sixth cut angle 531 , and the angle of the sixth cut angle 531 is 45 degrees.

[0116] Optionally, a groove side wall of the sixth grove 52 is provided with a ninth cutting angle 521 , and the angle of the ninth cutting angle 521 is 45 degrees.

[0117] Optionally, the second transverse groove 50 is arranged obliquely relative to the central axis of the radial tire. Figure 1 and Figure 6 As shown, the left end of the second transverse groove 50 is located above the right end thereof.

[0118] Optionally, the third transverse groove 51 is arranged obliquely relative to the central axis of the radial tire. Figure 1 and Figure 6 As shown, the left end of the third lateral groove 51 is located above the right end thereof.

[0119] Optionally, the ninth groove segment 53 is arranged obliquely relative to the central axis of the radial tire. Figure 1 and Figure 6 As shown, the left end of the ninth groove segment 53 is located above the right end thereof.

[0120] Optionally, the sixth sipe 52 is arranged obliquely relative to the central axis of the radial tire. Figure 1 and Figure 6 As shown, the left end of the sixth sipe 52 is located above the right end thereof.

[0121] Optionally, relative to the central axis of the radial tire, the inclination angle ζ of the second transverse groove 50 ranges from 3 degrees to 7 degrees. For example, ζ is 5 degrees.

[0122] Optionally, along the axial direction of the radial tire, the spacing W between the first end of the third transverse groove 51 and the fourth longitudinal groove 114 is 15 The value range is 7mm to 9mm; for example, W 15 It is 8mm.

[0123] Optionally, along the axial direction of the radial tire, the spacing W between the first end of the ninth groove segment 53 and the fourth longitudinal groove 114 is 25 The value range is 7mm to 9mm; for example, W 25 It is 8mm.

[0124] W 15 , W 25 , W 16 The width setting ensures that the outer side of the tire is more rigid and increases the penetration of the inner groove of the tire; thereby improving the support of the outer side of the tire and enhancing the tire's handling when turning; in order to ensure the tire's wet performance, the penetration of the inner lateral groove is increased.

[0125] In the present application, the fifth pattern further includes a plurality of preset grooves 54 spaced apart along the circumferential direction of the radial tire, and the plurality of preset grooves 54 are arranged in one-to-one correspondence with the plurality of fourth groove units.

[0126] The preset groove 54 includes a tenth groove segment 541, an eleventh groove segment 542 and a twelfth groove segment 543, the first end of the tenth groove segment 541 is a free end, the second end of the tenth groove segment 541 is spaced apart from the first end of the eleventh groove segment 542, the second end of the eleventh groove segment 542 is spaced apart from the first end of the twelfth groove segment 543, and the second end of the twelfth groove segment 543 is connected to the second end of the ninth groove segment 53 of the corresponding fourth groove unit.

[0127] The extension direction of the preset groove 54 is arranged at an angle to the extension direction of the second transverse groove 50 of the corresponding fourth groove unit.

[0128] The second end of the third transverse groove 51 is connected to the tenth groove segment 541 of the corresponding preset groove 54 , and the connection position between the second end of the third transverse groove 51 and the tenth groove segment 541 of the corresponding preset groove 54 is located between the first end and the second end of the tenth groove segment 541 .

[0129] Specifically, the extending direction of the tenth groove segment 541 is the same as the extending direction of the preset groove 54 , the extending direction of the eleventh groove segment 542 is the same as the extending direction of the preset groove 54 , and the extending direction of the twelfth groove segment 543 is the same as the extending direction of the preset groove 54 .

[0130] In the present application, along the circumference of the radial tire, the tread of the radial tire is divided into a plurality of pitches arranged in sequence; the pitch is the circumferential length of the radial tire. On the first tread portion 61, there is a first block between two adjacent first transverse grooves 70; each pitch includes a first transverse groove 70 and a first block adjacent to the first transverse groove 70. On the second tread portion 62, there is a second block between two adjacent fourth oblique grooves 20; each pitch includes a fourth oblique groove 20 and a second block adjacent to the fourth oblique groove 20. On the third tread portion 63, there is a third block between two adjacent first oblique grooves 30; each pitch includes a first oblique groove 30 and a third block adjacent to the first oblique groove 30. On the fourth tread portion 64, there is a fourth block between two adjacent seventh oblique grooves 40; each pitch includes a seventh oblique groove 40 and a fourth block adjacent to the seventh oblique groove 40. In the fifth tread portion 65 , there is a fifth block between two adjacent second transverse grooves 50 ; each pitch includes a second transverse groove 50 and a fifth block adjacent to the second transverse groove 50 .

[0131] The multiple pitches are arranged in disorder to balance the overall rigidity and vibration of the tire and improve the quiet performance. The multiple pitches include multiple pitch units arranged in sequence along the circumference of the radial tire, and each pitch unit includes four pitches arranged in sequence along the circumference of the radial tire; the four pitches of each pitch unit are arranged in one-to-one correspondence with the first pattern pitch P1, the second pattern pitch P2, the third pattern pitch P3, and the fourth pattern pitch P4, and each of the four pitches of each pitch unit is randomly selected from the first pattern pitch P1, the second pattern pitch P2, the third pattern pitch P3, and the fourth pattern pitch P4. P4 is greater than P3, P3 is greater than P2, and P2 is greater than P1.

[0132] Optionally, P1:P2:P3:P4=1:(1.149±0.03):(1.370±0.03):(1.50±0.02); that is, P4:P1=1.50±0.02; P3:P1=1.370±0.03; P2:P1=1.149±0.03.

[0133] In this application, the total length T of the tire crown arc is the width of the tire's contact patch; the relationship between the total length T of the tire crown arc and the nominal section width S of the tire is: 0.81≤T / S≤0.85. Figure 1 As shown, the width between the inner side and the outer side is the nominal section width S of the tire.

[0134] In the present application, the ratio of the width of the third tread portion 63 to the total length T of the tire crown arc is (12.7±0.5)%; the ratio of the width of the second tread portion 62 to the total length T of the tire crown arc is (12.8±0.5)%; the ratio of the width of the fourth tread portion 64 to the total length T of the tire crown arc is (11.5±0.5)%; the width direction of the third tread portion 63, the width direction of the second tread portion 62, and the width direction of the fourth tread portion 64 are all parallel to the axial direction of the radial tire.

[0135] In the present application, the ratio of the width W1 of the first longitudinal groove 111 to the total length T of the tire crown arc is (6.4±0.3)%; the ratio of the width W2 of the second longitudinal groove 112 to the total length T of the tire crown arc is (7.4±0.3)%; the ratio of the width W3 of the third longitudinal groove 113 to the total length T of the tire crown arc is (7.9±0.3)%; the ratio of the width W4 of the fourth longitudinal groove 114 to the total length T of the tire crown arc is (5.7±0.3)%; the width direction of the first longitudinal groove 111, the width direction of the second longitudinal groove 112, the width direction of the third longitudinal groove 113, and the width direction of the fourth longitudinal groove 114 are all parallel to the axial direction of the radial tire.

[0136] The setting of the above-mentioned width ratio can balance the overall ground contact stability of the pattern, ensure balanced pressure in the tire contact patch, comprehensively balance the tire's dry and wet performance, ensure the rigidity of the middle pattern block and the pressure distribution of the contact patch, ensure that the pattern block is not easy to tip over when the tire is loaded, and ensure the stability of the tire during driving; the width of the longitudinal groove on the outer side of the tire is smaller, which further improves the rigidity of the outer side of the tire, ensures the support of the outer side of the tire, reduces the deformation of the outer side of the tread during tire manipulation, and increases the lateral force of the tire when turning, thereby improving the handling.

[0137] In the present application, in each pitch, along the circumference of the radial tire, the offset spacing between the second end of the first transverse groove 70 and the second end of the fourth oblique groove 20 is H3, the offset spacing between the second end of the fourth oblique groove 20 and the first end of the first oblique groove 30 is H1, the offset spacing between the first end of the first oblique groove 30 and the first end of the seventh oblique groove 40 is H2; the offset spacing between the first end of the seventh oblique groove 40 and the center line of the second transverse groove 50 is H4. In this way, through the offset design, the pressure distribution balance and the ground contact rate of the ground contact area can be further balanced, and the driving stability can be improved.

[0138] The second end of the first transverse groove 70 extends to the first longitudinal groove 111; the second end of the fourth oblique groove 20 extends to the second longitudinal groove 112. The first end of the first oblique groove 30 is the connecting end of the second oblique groove 31; when the first oblique groove 30 is the second sipe 32, the position of the second oblique groove 31 can be assumed. The first end of the seventh oblique groove 40 extends to the third longitudinal groove 113. The center line of the second transverse groove 50 is parallel to the center axis of the radial tire.

[0139] Optionally, H1=0.6962P2, H2=0.717P2, H3=0.611P2, H4=0.138P2.

[0140] Table 2 is a performance test comparison between the new and old products of this design. The performance of the test vehicle is evaluated when driving at a specified speed on a simulated urban road in a professional test field. The larger the value, the better the performance and the better the driving stability.

[0141] Table 2

[0142] Evaluation Project Old products New products of this design Comfort 100 101 Wet handling 100 108 Dry handling 100 110 Wet braking 100 104 Dry braking 100 106

[0143] According to another aspect of the present invention, a radial tire is provided, comprising the above-mentioned pattern structure.

[0144] The radial tire of the present application is used to meet the driving safety, comfort and controllability of electric vehicles.

[0145] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0146] The present invention aims to provide a high-performance and comfortable tire, taking into account other properties of the tire, and optimizing and improving the design direction of the pattern.

[0147] The settings of the first cut angle 311, the second cut angle 321, the third cut angle 221, the fourth cut angle 411, the fifth cut angle 511, the sixth cut angle 531, the seventh cut angle 711, the eighth cut angle 721, and the ninth cut angle 521 not only increase the contact area between the tire and the ground, but also provide stronger grip on wet and slippery roads.

[0148] This application optimizes the groove ratio and the effective ground contact rate so that the pattern blocks can fully contact the ground, increase the ground contact area, shorten the braking distance, and improve safety performance.

[0149] The present application improves the handling by optimizing the groove inclination angle, thereby increasing the rigidity of the tread during driving and increasing the lateral force of the tire when turning.

[0150] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0151] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0152] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pattern structure, applied to a radial tire, wherein four longitudinal grooves of the pattern structure divide the tread of the radial tire into a first tread portion (61), a second tread portion (62), a third tread portion (63), a fourth tread portion (64), and a fifth tread portion (65) arranged in sequence; the four longitudinal grooves include a first longitudinal groove (111), a second longitudinal groove (112), a third longitudinal groove (113), and a fourth longitudinal groove (114) arranged in sequence; the pattern structure includes a third pattern arranged in the third tread portion (63); characterized in that, The third pattern comprises a plurality of first oblique grooves (30) spaced apart along the circumference of the radial tire, the plurality of first oblique grooves (30) comprising a plurality of first groove units sequentially distributed along the circumference of the radial tire, the first groove unit comprising two first oblique grooves (30) sequentially distributed along the circumference of the radial tire; the two first oblique grooves (30) of the first groove unit are respectively a second oblique groove (31) and a second sipe (32); One end of the second oblique groove (31) extends to the second longitudinal groove (112), and the other end is spaced apart from the third longitudinal groove (113); the groove width of the second oblique groove (31) gradually decreases from the connecting end to the free end of the second oblique groove (31); One end of the second slit (32) extends to the third longitudinal groove (113), and the other end is spaced apart from the second longitudinal groove (112).

2. The pattern structure according to claim 1, characterized in that: The free end of the second oblique groove (31) is a pointed end; and / or Both side walls of the second oblique groove (31) are arc surfaces; and / or Along the axial direction of the radial tire, the distance between the free end of the second oblique groove (31) and the third longitudinal groove (113) is W. 10 The distance between the free end of the second slit (32) and the second longitudinal groove (112) is W8, and W8 is less than W 10 .

3. The pattern structure according to claim 1, characterized in that: The pattern structure further comprises a second pattern arranged on the second tread portion (62); the second pattern comprises a plurality of fourth oblique grooves (20) spaced apart along the circumference of the radial tire; the plurality of fourth oblique grooves (20) comprise a plurality of second groove units sequentially distributed along the circumference of the radial tire; the second groove unit comprises two fourth oblique grooves (20) sequentially distributed along the circumference of the radial tire; the two fourth oblique grooves (20) of the second groove unit are respectively a fifth oblique groove and a sixth oblique groove; The fifth oblique groove comprises a first groove segment (21) and a fourth groove (22), the first end of the first groove segment (21) extends to the first longitudinal groove (111), the second end of the first groove segment (21) is connected to the first end of the fourth groove (22), and the second end of the fourth groove (22) extends to the second longitudinal groove (112); The sixth oblique groove comprises a third groove segment (23) and a first knife groove (24), wherein a first end of the first knife groove (24) extends to the first longitudinal groove (111), a second end of the first knife groove (24) is spaced apart from a first end of the third groove segment (23), and a second end of the third groove segment (23) extends to the second longitudinal groove (112).

4. The pattern structure according to claim 1, characterized in that: The pattern structure further comprises a fourth pattern arranged on the fourth tread portion (64); the fourth pattern comprises a plurality of seventh oblique grooves (40) spaced apart along the circumference of the radial tire; the plurality of seventh oblique grooves (40) comprise a plurality of third groove units sequentially distributed along the circumference of the radial tire; the third groove unit comprises two seventh oblique grooves (40) sequentially distributed along the circumference of the radial tire; the two seventh oblique grooves (40) of the third groove unit are respectively a third sipe (41) and a ninth oblique groove; One end of the third knife groove (41) extends to the third longitudinal groove (113), and the other end of the third knife groove (41) is spaced apart from the fourth longitudinal groove (114); The ninth oblique groove comprises a fourth groove segment (42) and a fifth groove segment (43); the first end of the fourth groove segment (42) extends to the third longitudinal groove (113), and the second end of the fifth groove segment (43) extends to the fourth longitudinal groove (114); the second end of the fourth groove segment (42) is spaced from the first end of the fifth groove segment (43).

5. The pattern structure according to claim 4, characterized in that: Along the extension direction of the fourth groove segment (42), the fourth groove segment (42) comprises a first groove segment (421) and a second groove segment (422) connected to each other, an end of the first groove segment (421) away from the second groove segment (422) is the first end of the fourth groove segment (42), and an end of the second groove segment (422) away from the first groove segment (421) is the second end of the fourth groove segment (42); The groove depth of the first groove section (421) is greater than the groove depth of the second groove section (422).

6. The pattern structure according to claim 1, characterized in that: The pattern structure further includes a first pattern arranged on the first tread portion (61); the first pattern includes a plurality of first transverse grooves (70) spaced apart along the circumference of the radial tire; The first transverse groove (70) comprises a sixth groove segment (71) and a fifth sipe (72), wherein a first end of the sixth groove segment (71) extends toward the sidewall, a second end of the sixth groove segment (71) is connected to a first end of the fifth sipe (72), and a second end of the fifth sipe (72) extends to the first longitudinal groove (111).

7. The pattern structure according to claim 6, characterized in that: In a direction from the first end to the second end of the sixth groove segment (71), the groove width of the sixth groove segment (71) gradually increases; and / or Along the groove width direction of the sixth groove segment (71), the two ends of the sixth groove segment (71) are respectively a third end and a fourth end, and the fifth grooving groove (72) is connected to the fourth end of the sixth groove segment (71).

8. The pattern structure according to claim 1, characterized in that: The pattern structure further comprises a fifth pattern arranged on the fifth tread portion (65); the fifth pattern comprises a plurality of second transverse grooves (50) spaced apart along the circumferential direction of the radial tire; the plurality of second transverse grooves (50) comprise a plurality of fourth groove units sequentially distributed along the circumferential direction of the radial tire, the fourth groove unit comprises two second transverse grooves (50) sequentially distributed along the circumferential direction of the radial tire; the two second transverse grooves (50) of the fourth groove unit are respectively a third transverse groove (51) and a fourth transverse groove; The first end of the third transverse groove (51) is spaced apart from the fourth longitudinal groove (114), and the second end of the third transverse groove (51) extends toward the sidewall; The fourth transverse groove includes a sixth sipe (52) and a ninth groove segment (53), the first end of the sixth sipe (52) extends to the fourth longitudinal groove (114), the second end of the sixth sipe (52) is connected to the first end of the ninth groove segment (53), and the second end of the ninth groove segment (53) extends toward the sidewall.

9. The pattern structure according to claim 8, characterized in that: From the first end to the second end of the third transverse groove (51), the groove width of the third transverse groove (51) gradually decreases; and / or In a direction from the first end to the second end of the ninth groove segment (53), the groove width of the ninth groove segment (53) gradually decreases; and / or Along the groove width direction of the ninth groove segment (53), the two ends of the ninth groove segment (53) are respectively a third end and a fourth end, and the sixth grooving groove (52) is connected to the third end of the ninth groove segment (53).

10. The pattern structure according to claim 8, characterized in that: The fifth pattern further comprises a plurality of preset grooves (54) spaced apart along the circumference of the radial tire, wherein the plurality of preset grooves (54) are arranged in one-to-one correspondence with the plurality of fourth groove units; The preset groove (54) comprises a tenth groove segment (541), an eleventh groove segment (542) and a twelfth groove segment (543); the first end of the tenth groove segment (541) is a free end; the second end of the tenth groove segment (541) is spaced apart from the first end of the eleventh groove segment (542); the second end of the eleventh groove segment (542) is spaced apart from the first end of the twelfth groove segment (543); and the second end of the twelfth groove segment (543) is connected to the second end of the ninth groove segment (53) of the corresponding fourth groove unit; The extension direction of the preset groove (54) is arranged at an angle to the extension direction of the second transverse groove (50) of the corresponding fourth groove unit; The second end of the third transverse groove (51) is connected to the tenth groove segment (541) of the corresponding preset groove (54).

11. A radial tire, characterized in that: The invention comprises the pattern structure as claimed in any one of claims 1 to 10.

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