A super high performance tire with asymmetric tread patterns

Abstract

The present invention relates to the field of tires, and in particular to a super high performance tire with an asymmetric tread pattern. The tread pattern structure of the tire includes a first shoulder tread block, a first longitudinal main groove, a first side rib tread block, a second longitudinal main groove, a middle tread block, a third longitudinal main groove, a second side rib tread block, a fourth longitudinal main groove, and a second shoulder tread block arranged in sequence from the inside side to the outside side; by providing a plurality of steel sheet grooves in the middle tread block, the first side rib tread block, and the second side rib tread block to replace the ordinary grooves in the tread pattern of a normal high performance tire, the noise is effectively reduced. At the same time, the pitch lengths and numbers of the inside and outside of the tread pattern are different, improving the handling performance of the tire.

Description

Technical Field

[0001] The present invention relates to the field of tires, and more particularly to a super high performance tire with an asymmetric tread pattern. Background Art

[0002] In recent years, with the increasing share of high-performance sports SUVs and high-performance sports cars, these models are increasingly equipped with high-performance tires, and the sales of high-performance tires have become a new growth point for tire companies. Consumers of high-performance tires have high requirements for tire performance. Mainly, the tire should have precise steering and stable cornering performance, as well as good traction and braking performance. When meeting these requirements, the tire should also comply with the label certifications of noise, wet grip, rolling resistance, etc. of the EU, the United States, and national standards, which poses challenges in the process of designing tire tread patterns for us. Summary of the Invention

[0003] To solve the above problems, the object of the present invention is to provide a super high performance tire with an asymmetric tread pattern, which improves the handling performance and noise reduction performance by setting different pitch numbers on the inside and outside of the tire tread pattern, and setting different steel sheet grooves and transverse grooves on the tread blocks.

[0004] For the purpose of the present invention, the following technical solutions are adopted for implementation:

[0005] A super high performance tire with an asymmetric tread pattern, the tread pattern structure of the tire includes an intermediate tread block in the middle, a first shoulder tread block on the inside side, a second shoulder tread block on the outside side, a second side rib tread block between the intermediate tread block and the first shoulder tread block, and a first side rib tread block between the intermediate tread block and the second shoulder tread block; a first longitudinal main groove is provided between the first shoulder tread block and the first side rib tread block, a second longitudinal main groove is provided between the first side rib tread block and the intermediate tread block, a third longitudinal main groove is provided between the intermediate tread block and the second side rib tread block, and a fourth longitudinal main groove is provided between the second side rib tread block and the second shoulder tread block; the tread blocks and the main grooves all extend along the circumferential direction of the tire;

[0006] A plurality of first shoulder transverse grooves extending transversely and communicating with the first longitudinal main groove are provided in the first shoulder tread block, and a chamfer is provided at the top of the groove;

[0007] A plurality of first steel sheet grooves are provided in the first side rib tread block, the first steel sheet grooves are not communicated with the first longitudinal main groove and are communicated with the second longitudinal main groove; the first steel sheet grooves are in a √-shaped form, and a chamfer is provided at the top position;

[0008] Multiple second steel sheet grooves that are connected to both the first longitudinal main groove and the second longitudinal main groove are provided inside the middle tread block, and the number of pitches of the middle tread block is the same as that of the inside side;

[0009] Multiple third steel sheet grooves that are connected to both the third longitudinal main groove and the fourth longitudinal main groove are provided inside the second side rib tread block;

[0010] Multiple second shoulder transverse grooves that extend horizontally and are connected to the fourth longitudinal main groove are provided inside the second shoulder tread block, and chamfers are provided at the top of the grooves.

[0011] Preferably, the inside pitch length is pitchlengthA, the outside pitch length is pitchlengtha; the number of inside pitches is N, and the number of outside pitches is n; where pitchlengthA = 22 - 32 mm, pitchlengtha = 26 - 38 mm, N = 78, and n = 64.

[0012] Preferably, from the inside side to the outside side, the width size relationship of the four longitudinal main grooves is L2 = L3 > L1 > L4; where L1 is the width of the first longitudinal main groove, L2 is the width of the second longitudinal main groove, L3 is the width of the third longitudinal main groove, and L4 is the width of the fourth longitudinal main groove.

[0013] Preferably, the width relationship of the first side rib tread block, the middle tread block, and the second side rib tread block is: L6 ≈ L7 ≈ L8.

[0014] Preferably, the width relationship of the first shoulder tread block and the second shoulder tread block is: L9 / L5 = 1.05 - 1.07.

[0015] Preferably, the distance L11 between the first shoulder transverse groove in the first shoulder tread block and the inside tread edge is 5 - 8 mm; the angle A1 between the first shoulder transverse groove and the horizontal direction is 5 - 8°; the longitudinal width H1 of the groove of the first shoulder transverse groove is 3 - 3.8 mm; the chamfer widths of the a1 and a2 sides of the chamfer at the top of the groove of the first shoulder transverse groove are 1 mm, and the chamfer widths of the a3 and a4 sides change uniformly from 1 mm to 0 mm in the direction from the center line to the tread line.

[0016] Preferably, the distance L12 between the second shoulder transverse groove in the second shoulder tread block and the outside tread edge is 5 - 8 mm; the angle A5 between the second shoulder transverse groove and the horizontal direction is 5 - 8°; the longitudinal width H5 of the groove of the second shoulder transverse groove is 3 - 3.8 mm; the chamfer widths of the a5 and a6 sides of the chamfer at the top of the groove of the second shoulder transverse groove are 1 mm, and the chamfer widths of the a7 and a8 sides change uniformly from 1 mm to 0 mm in the direction from the center line to the tread line.

[0017] Preferably, the groove width H2 of the first steel sheet groove in the first side rib tread block is 0.6 or 0.7 mm, the ratio L10 / L6 of the transverse length L10 of the first steel sheet groove to the transverse length L6 of the first side rib tread block is 2 / 3, the angle A2 between the a9 side and the horizontal direction is 60 - 65°, and the angle A3 between the a10 side and the horizontal direction is 15 - 18°; the chamfer of the a9 side is 0.7 mm, and the chamfer of the a10 side varies uniformly from 0.7 mm to 0 mm in the direction from the tread line to the center line.

[0018] Preferably, the groove width H3 of the second steel sheet groove in the middle tread block is 0.8 mm, and the angle A4 between the second steel sheet groove and the horizontal direction is 7 - 10°.

[0019] Preferably, the groove width H4 of the third steel sheet groove in the second side rib tread block is 0.8 mm, the ratio L13 / L8 of the left transverse length L13 of the third steel sheet groove to the transverse length L8 of the second side rib tread block is 2 / 3, the angle A5 between the left side of the third steel sheet groove and the horizontal direction is 4 - 6°, and the angle A6 between the right side of the third steel sheet groove and the horizontal direction is 4 - 7°.

[0020] In summary, the advantage of the present invention is that multiple steel sheet grooves are provided in the middle tread block, the first side rib tread block, and the second side rib tread block to replace the ordinary grooves in the normal high-performance tire tread, effectively reducing the noise. At the same time, the pitch lengths and numbers of the inside and outside of the tread are different, improving the handling performance of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 and Figure 2 is a plan view of the tire tread structure.

[0022] Figure 3 is a detailed view of the first shoulder transverse groove.

[0023] Figure 4 is a detailed view of the second shoulder transverse groove.

[0024] Figure 5 is a detailed view of the first steel sheet groove.

[0025] Figure 6 is a schematic diagram of the transverse stiffness. DETAILED DESCRIPTION OF THE INVENTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0027] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0028] At the same time, it should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] Next, based on the attached Figures 1 to 5 , a specific embodiment of the present invention will be described in detail. However, it should be understood that, without further elaboration, the elements, structures, and features in one embodiment can also be beneficially combined with those in other embodiments.

[0030] For example Figure 1As shown in the figure, a super high-performance tire is provided with an asymmetric tire tread pattern. The tire tread pattern includes an intermediate tread block 1 with the circumferential center line coinciding with the tread equator plane, a first shoulder tread block 4 located at the inside shoulder position, a second shoulder tread block 5 located at the outside shoulder position, a first side rib tread block 2 located between the intermediate tread block 1 and the first shoulder tread block 4, and a second side rib tread block 3 located between the intermediate tread block 1 and the second shoulder tread block 5. A first longitudinal main groove 6 is provided between the first shoulder tread block 4 and the first side rib tread block 2, a second longitudinal main groove 7 is provided between the first side rib tread block 2 and the intermediate tread block 1, a third longitudinal main groove 8 is provided between the intermediate tread block 1 and the second side rib tread block 3, and a fourth longitudinal main groove 9 is provided between the second side rib tread block 3 and the second shoulder tread block 5. From the inside side to the outside side, the width size relationship of the four longitudinal main grooves is L2 = L3 > L1 > L4. The first shoulder tread block 4 is evenly arranged with a plurality of first shoulder transverse grooves 10 along the tire circumference. The top of the first shoulder transverse groove 10 is provided with a chamfer and the first shoulder transverse groove 10 communicates with the first longitudinal main groove 6. The second shoulder tread block 5 is evenly arranged with a plurality of second shoulder transverse grooves 11 along the tire circumference. The top of the second shoulder transverse groove 11 is provided with a chamfer and the second shoulder transverse groove 11 communicates with the fourth longitudinal main groove 9.

[0031] As Figure 1 and Figure 2 shown, a plurality of second steel sheet grooves 13 extending transversely and communicating with both the second longitudinal main groove 7 and the third longitudinal main groove 8 are provided in the intermediate tread block 1. The angle A4 between the second steel sheet groove 13 and the horizontal direction is 7 - 10°, and the width of the second steel sheet groove 13 along the tire circumference is 0.7 - 1 mm.

[0032] As Figure 1 、 Figure 2 、 Figure 5 shown, a plurality of first steel sheet grooves 12 are provided in the first side rib tread block 2. The first steel sheet grooves 12 do not communicate with the first longitudinal main groove 6 and communicate with the second longitudinal main groove 7. The first steel sheet grooves 12 are in a √ shape and have a chamfer at the top. The width of the first steel sheet groove 12 along the tire circumference is 0.5 - 0.8 mm. The ratio L10 / L6 of the transverse length L10 of the first steel sheet groove 12 to the transverse length L6 of the first side rib tread block 2 is 0.6 - 0.7. The chamfer width at the top of the first steel sheet groove 12 is as Figure 5 shown, the chamfer of side a9 is 0.7 mm, and the chamfer of side a10 varies uniformly from 0.7 → 0 mm from the tread line to the center line direction. The angle A2 between side a9 and the horizontal direction is 60 - 65°, and the angle A3 between side a10 and the horizontal direction is 15 - 18°.

[0033] As Figure 1 、Figure 2 As shown, multiple third steel sheet grooves 14 extending horizontally are provided in the second side rib tread block 3, and the third steel sheet grooves 14 communicate with both the third longitudinal main groove 8 and the fourth longitudinal main groove 9. The ratio L13 / L8 of the horizontal length L13 on the left side of the third steel sheet groove 14 to the horizontal length L8 of the second side rib tread block 3 is 0.6 - 0.7. The angle A5 between the left side of the third steel sheet groove 14 and the horizontal direction is 4 - 6°. The angle A6 between the right side of the third steel sheet groove 14 and the horizontal direction is 4 - 7°. The width of the third steel sheet groove 14 along the circumferential direction of the tire is 0.7 - 1 mm.

[0034] Steel sheets are provided in the intermediate tread block 1, the first side rib tread block 2, and the second side rib tread block 3 to replace the transverse grooves in ordinary tires, increasing the tread grounding area, enhancing the rigidity of the tread blocks, improving the dry braking performance and handling performance of the tire. At the same time, the use of steel sheets also reduces the generation of noise, achieving a good sound insulation effect.

[0035] As Figure 1 、 Figure 2 、 Figure 3 shown, multiple first shoulder transverse grooves 10 extending horizontally and communicating with the first longitudinal main groove 6 are provided in the first shoulder tread block 4. The distance L11 between the first shoulder transverse groove 10 and the inside tread edge is 5 - 8 mm; the angle A1 between the first shoulder transverse groove 10 and the horizontal direction is 5 - 8°; the longitudinal width H1 of the groove of the first shoulder transverse groove 10 is 2.6 - 3.4 mm. The chamfer widths of the top of the groove of the first shoulder transverse groove 10 for the a1 and a2 sides are 1 mm, and the chamfer widths for the a3 and a4 sides vary uniformly from 1 → 0 mm in the direction from the center line to the tread surface line.

[0036] As Figure 1 、 Figure 2 、 Figure 4 shown, multiple second shoulder transverse grooves 11 extending horizontally and communicating with the fourth longitudinal main groove 9 are provided in the second shoulder tread block 5. The distance L12 between the second shoulder transverse groove 11 and the outside tread edge is 5 - 8 mm; the angle A7 between the second shoulder transverse groove 11 and the horizontal direction is 5 - 8°; the longitudinal width H5 of the groove of the second shoulder transverse groove 11 is 2.6 - 3.4 mm. The chamfer widths of the top of the groove of the second shoulder transverse groove 11 for the a5 and a6 sides are 1 mm, and the chamfer widths for the a7 and a8 sides vary from 1 → 0 mm.

[0037] As Figure 1As shown, the number and size of pitches on the inside and outside sides of this asymmetric tire tread are different. The pitch length on the inside is pitchlengthA, and the pitch length on the outside is pitchlengtha. The number of pitches on the inside is N, and the number of pitches on the outside is n. N > n. The number of pitches, pitch length, and pitch arrangement are all optimized by simulation software. pitchlengthA = 22 - 32 mm, pitchlengtha = 26 - 38 mm, N = 78, and n = 64.

[0038] The number of pitches and pitch size of Inside and outside are different. The saturation degree of the Inside side of the tire is 74% - 75%, and that of the outside side is 78% - 79%. Therefore, when the tire is running and the tread contacts the ground, the contact area of the outside side is larger, which improves the grip performance and handling stability during high-speed turning.

[0039] The tread lines B on both sides of the center line A are the outermost grounding positions in the axial direction of the tire when a regular load is applied to the tire in a regular state and it contacts the plane with a 0° camber angle. The regular state is when the tire rim is installed on a regular rim, filled with regular internal pressure, and in a load-free state. In this specification, unless otherwise specified, the dimensions of each part of the tire are values measured in the regular state.

[0040] "Regular rim" is the rim that specifies the tire's specifications in the specification system to which the tire belongs. For example, if it is JATMA, it is the "standard rim". If it is TRA, it is the "Design Rim". If it is ETRTO, it is the "Measuring Rim".

[0041] "Regular internal pressure" is the air pressure specified for each specification of the tire in the specification system to which the tire belongs. If it is JATMA, it is the "maximum air pressure". If it is TRA, it is the maximum value recorded in the TIRE table "LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES". If it is ETRTO, it is the "INFLATION PRESSURE".

[0042] "Regular load" is the load specified for each specification of the tire in the specification system to which the tire belongs. If it is JATMA, it is the "maximum applied capacity". If it is TRA, it is the maximum value recorded in the TIRE table "LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES". If it is ETRTO, it is the "LOAD CAPACITY".

[0043] The tread contact width TAW is the distance in the axial direction of the tire between the tread lines B of the tire in the above-mentioned normal state.

[0044] The common specifications for each tire are 235 / 30R20. MAX. LOAD 560 kg (1235 LBS), MAX. PRESS. 350 kPa (51 PSI), TREAD PLIES: 1 POLYESTER + 2 STEEL + 2 NYLON, SIDEWALL PLY: 1 POLYESTER.

[0045] As far as we know, the handling performance of the tire has a great relationship with the lateral stiffness LS (lateral stiffness) and cornering stiffness CS (cornering stiffness) of the tire tread pattern. The calculation formula for the lateral stiffness LS of the tire tread pattern is as follows:

[0046]

[0047] When there are fewer steel sheets on the tire tread and the groove width is smaller, the lateral displacement of the tire will be less and the lateral stiffness of the pattern will be greater.

[0048] The cornering stiffness CS of the tire is related to the aspect ratio of the tire. For low aspect ratio tires, the cornering stiffness will be greater.

[0049] The handling performance of the tire is jointly affected by the lateral stiffness of the tread pattern and the cornering stiffness of the tire. To improve the handling performance of the tire, it is necessary to increase the lateral stiffness and cornering stiffness of the tire. The following factors can be considered: ① Increase the hardness of the tread formula; ② Reduce the depth of the tread grooves; ③ Use a low aspect ratio for the tire carcass to increase the cornering stiffness of the tire; ④ Reduce the number of steel sheets and lateral grooves, reduce the number of tire pitches, and reduce the width of the tread grooves.

[0050] As a high-performance tire product, this tire product adopts a brand-new high-performance tire formula. The middle rib is replaced by steel sheet grooves instead of tread grooves, and a low aspect ratio carcass design is adopted, effectively improving the handling performance of the tire. According to the actual test results, the handling performance of this tire is excellent, exceeding the handling performance level of general high-performance tires.

[0051] Above, the ultra-high performance tire with an asymmetric pattern of the present invention has been described in detail. However, the present invention is not limited to the above specific embodiments and can be implemented in various modified ways. Simple modifications and deformations made according to this invention still fall within the protection scope of the technical solution of this invention patent.

Claims

1. An ultra-high performance tire with asymmetric patterns, characterized in that, The tread pattern structure of the tire includes a central tread block (1) located in the middle, a first shoulder tread block (4) located on the inner side, a second shoulder tread block (5) located on the outer side, a first side rib tread block (2) located between the central tread block (1) and the first shoulder tread block (4), and a second side rib tread block (3) located between the central tread block (1) and the second shoulder tread block (5); a first longitudinal main groove (6) is provided between the first shoulder tread block (4) and the first side rib tread block (2), a second longitudinal main groove (7) is provided between the first side rib tread block (2) and the central tread block (1), a third longitudinal main groove (8) is provided between the central tread block (1) and the second side rib tread block (3), and a fourth longitudinal main groove (9) is provided between the second side rib tread block (3) and the second shoulder tread block (5); the tread blocks and the main grooves all extend along the circumferential direction of the tire; A plurality of first shoulder transverse grooves (10) extending transversely and communicating with the first longitudinal main groove (6) are provided in the first shoulder tread block (4), and chamfers are provided at the tops of the grooves; A plurality of first steel sheet grooves (12) are provided in the first side rib tread block (2), the first steel sheet grooves (12) are not communicated with the first longitudinal main groove (6) but are communicated with the second longitudinal main groove (7); the first steel sheet grooves (12) are in a √-shape and chamfers are provided at the top positions; the first steel sheet grooves (12) include short grooves and long grooves, the long grooves are communicated with the second longitudinal main groove (7), both the short grooves and the long grooves are inclined towards the center line, the angle A2 between the short grooves and the horizontal direction is 60-65°, and the angle A3 between the long grooves and the horizontal direction is 15-18°; the chamfer width of the short grooves is 0.7 mm, and the chamfer width of the long grooves varies uniformly from 0.7 mm to 0 mm in the direction from the tread line to the center line; A plurality of second steel sheet grooves (13) that are communicated with both the first longitudinal main groove (6) and the second longitudinal main groove (7) are provided in the central tread block (1), the second steel sheet grooves (13) are inclined, and the pitch number of the central tread block (1) is the same as that of the inner side; A plurality of third steel sheet grooves (14) that are communicated with both the third longitudinal main groove (8) and the fourth longitudinal main groove (9) are provided in the second side rib tread block (3); the left-side grooves and the right-side grooves of the third steel sheet grooves are inclined in opposite directions, the angle A5 between the left-side grooves and the horizontal direction is 4-6°, the angle A6 between the right-side grooves and the horizontal direction is 4-7°, and the ratio L13 / L8 of the transverse length L13 of the left-side grooves to the transverse length L8 of the second side rib tread block (3) is 2 / 3; A plurality of second shoulder transverse grooves (11) extending transversely and communicating with the fourth longitudinal main groove (9) are provided in the second shoulder tread block (5), and chamfers are provided at the tops of the grooves; Wherein the tread line is the outermost grounding position in the axial direction of the tire when the tire in the normal state is applied with a normal load and grounded on a plane with a 0° camber angle; The inner pitch length is pitchlengthA, and the outer pitch length is pitchlengtha; the number of inner pitches is N, and the number of outer pitches is n; where pitchlengthA = 22 - 32 mm, pitchlengtha = 26 - 38 mm, N = 78, and n = 64.

2. The ultra-high performance tire with asymmetric patterns according to claim 1, wherein From the inner side to the outer side, the width relationship of the four longitudinal main grooves is L2 = L3 > L1 > L4; where L1 is the width of the first longitudinal main groove (6), L2 is the width of the second longitudinal main groove (7), L3 is the width of the third longitudinal main groove (8), and L4 is the width of the fourth longitudinal main groove (9).

3. The ultra-high performance tire with asymmetric patterns according to claim 1, characterized in that, The width L6 of the first side rib tread block (2), the width L7 of the middle tread block (1), and the width L8 of the second side rib tread block (3) are in the relationship: L6 ≈ L7 ≈ L8.

4. The ultra-high performance tire with asymmetric patterns according to claim 1, wherein The width L5 of the first shoulder tread block (4) and the width L9 of the second shoulder tread block (5) are in the relationship: L9 / L5 = 1.05 - 1.

07.

5. The super high performance tire with asymmetric patterns according to claim 4, characterized in that, The distance L11 between the first shoulder transverse groove (10) in the first shoulder tread block (4) and the inner tread edge is 5 - 8 mm; the angle A1 between the first shoulder transverse groove (10) and the horizontal direction is 5 - 8°; the longitudinal groove width H1 of the first shoulder transverse groove (10) is 3 - 3.8 mm; the first shoulder transverse groove (10) includes two short sides communicating with the first longitudinal main groove (6), two long sides respectively communicating with the two short sides, and another short side connecting the two long sides. Chamfers are provided at the tops of the two short sides and the two long sides. The chamfer width of the two short sides is 1 mm, and the chamfer width of the two long sides varies uniformly from 1 mm to 0 mm in the direction from the center line to the tread line.

6. The ultra-high performance tire with asymmetric patterns according to claim 4, characterized in that, The distance L12 between the second shoulder transverse groove (11) in the second shoulder tread block (5) and the outer tread edge is 5 - 8 mm; the angle A5 between the second shoulder transverse groove (11) and the horizontal direction is 5 - 8°; the longitudinal groove width H5 of the second shoulder transverse groove (11) is 3 - 3.8 mm. The second shoulder transverse groove (11) includes two short sides communicating with the fourth longitudinal main groove (9), two long sides respectively communicating with the two short sides, and another short side connecting the two long sides. Chamfers are provided at the tops of the two short sides and the two long sides. The chamfer width of the two short sides is 1 mm, and the chamfer width of the two long sides varies uniformly from 1 mm to 0 mm in the direction from the center line to the tread line.

7. An ultra-high performance tire with asymmetric patterns according to claim 3, characterized in that, The groove width H2 of the first steel sheet groove (12) in the first side rib tread block (2) is 0.6 or 0.7 mm, and the ratio L10 / L6 of the transverse length L10 of the first steel sheet groove (12) to the transverse length L6 of the first side rib tread block (2) is 2 / 3.

8. The super high performance tire with asymmetric patterns according to claim 3, characterized in that, The groove width H3 of the second steel sheet groove (13) in the middle tread block (1) is 0.8 mm, and the angle A4 between the second steel sheet groove (13) and the horizontal direction is 7 - 10°.

9. The ultra-high performance tire with asymmetric patterns according to claim 3, characterized in that, The groove width H4 of the third steel sheet groove (14) in the second side rib tread block (3) is 0.8 mm.

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