阅读说明：本技术 一种低噪音的全路况轮胎 (Low-noise all-road-condition tire ) 是由 陈飞 李翠 蔡莹莹 余本祎 于 2019-09-18 设计创作，主要内容包括：本发明公开了一种低噪音的全路况轮胎,包括胎面,所述胎面沿轮胎周向开设有周向沟槽、沿轮胎宽度方向开设有横向沟槽,所述横向沟槽由内向外依次包括内侧肩部横向沟槽、内侧中央横向沟槽、中央横沟槽、外侧中央横向沟槽以及外侧肩部横向沟槽。本发明通过在轮胎胎面上沿着周向开设多条周向槽、沿着轮胎宽度方向开设多条横向沟槽,使得轮胎胎面保持花纹块较大、沟深较深等特征,以使得该轮胎具有良好的通过性能、排水性能及抓地性能；同时,通过将各个横向沟槽在轮胎胎面上整体布局合理、各个横向沟槽的形状及角度合理配置,降低轮胎在行驶过程中产生的噪音的目的,使其满足全路况类型轮胎噪音限值的规定。(The invention discloses a low-noise all-road-condition tire which comprises a tire tread, wherein the tire tread is provided with a circumferential groove along the circumferential direction of the tire, and a transverse groove along the width direction of the tire, and the transverse groove sequentially comprises an inner shoulder transverse groove, an inner central transverse groove, a central transverse groove, an outer central transverse groove and an outer shoulder transverse groove from inside to outside. According to the invention, the tire tread is provided with the plurality of circumferential grooves along the circumferential direction and the plurality of transverse grooves along the width direction of the tire, so that the tire tread keeps the characteristics of larger pattern blocks, deeper grooves and the like, and the tire has good passing performance, drainage performance and ground gripping performance; meanwhile, the transverse grooves are reasonably distributed on the tire tread as a whole, and the shapes and the angles of the transverse grooves are reasonably distributed, so that the purpose of reducing the noise generated by the tire in the running process is achieved, and the noise limit value of the tire in the whole road condition is met.)

1. A low-noise all-road-condition tire comprises a tire tread, wherein the tire tread is provided with a circumferential groove along the circumferential direction of the tire and a transverse groove along the width direction of the tire, and the circumferential groove and the transverse groove divide the tire tread into a plurality of pattern blocks; the circumferential groove sequentially comprises an inner shoulder circumferential groove (1), an inner central circumferential groove (2), an outer central circumferential groove (3) and an outer shoulder circumferential groove (4) from inside to outside; the method is characterized in that:

The transverse grooves sequentially comprise an inner shoulder transverse groove (5), an inner central transverse groove (6), a central transverse groove (7), an outer central transverse groove (8) and an outer shoulder transverse groove (9) from inside to outside;

The inner shoulder transverse groove (5) and the outer shoulder transverse groove (9) are both two-section transverse grooves comprising deep grooves and shallow grooves;

The inner central transverse groove (6) and the outer central transverse groove (8) are both horn-shaped transverse grooves;

The central transverse groove (7) comprises a fold-shaped transverse groove and a transverse groove penetrating through the transverse groove.

2. The low noise all-terrain tire of claim 1, wherein: the central transverse groove (7) is located between the inner central circumferential groove (2) and the outer central circumferential groove (3);

the two ends of the through transverse groove of the central transverse groove (7) are respectively communicated with the inner side central circumferential groove (2) and the outer side central circumferential groove (3), and the folded transverse groove of the central transverse groove (7) crosses the through transverse groove and cuts the through transverse groove into two sections.

3. a low-noise all-road tire according to claim 1 or 2, wherein: the depth of the through transverse groove is smaller than that of the folded transverse groove, and an included angle beta is formed between the center line of the tire along the circumferential direction and a section of center line of the through transverse groove close to the inner side of the tire;

The included angle beta is more than 30 degrees and less than 70 degrees.

4. The low noise all-terrain tire of claim 1, wherein: the inner side central transverse groove (6) and the outer side central transverse groove (8) are both two-section horn-shaped transverse grooves;

The width of the small end opening of the inner side central transverse groove (6) and the width of the small end opening of the outer side central transverse groove (8) are both D₁The width of the large end opening of the inner side central transverse groove (6) and the width of the large end opening of the outer side central transverse groove (8) are both D₂And a width D of the small end opening₁And the width D of the large end opening₂between areThe relationship (2) of (c).

5. the low noise all-terrain tire of claim 4, wherein: the small end opening of the inner side central transverse groove (6) is communicated with one side of the inner side central circumferential groove (2), the large end opening of the inner side central transverse groove (6) is communicated with one side of the inner side shoulder circumferential groove (1), and the small end opening and the large end opening of the inner side central transverse groove (6) are arranged at the upper part and the lower part in the width direction of the tire.

6. The low noise all-terrain tire of claim 4, wherein: the small end opening of the outer side central transverse groove (8) is communicated with one side of the outer side central circumferential groove (3), the large end opening of the outer side central transverse groove (8) is communicated with one side of the outer side shoulder circumferential groove (4), and the large end opening of the outer side central transverse groove (8) is opened at the upper end and the lower end in the width direction of the tire.

7. A low noise all-terrain tire according to any one of claims 4-6, wherein: the tire forms an included angle delta between the central line of the tire along the circumferential direction and a section of the central line of the inner side central transverse groove (6) with the small end opening section close to the inner side central circumferential groove (2) and between the central line of the tire along the circumferential direction and a section of the central line of the outer side central transverse groove (8) with the small end opening section close to the outer side central circumferential groove (3)₁The tire forms an included angle delta between a section of central line of the tire along the circumferential direction and a section of central line of the inner side central transverse groove (6) with the large end opening section close to the inner side central circumferential groove (2), and between a section of central line of the tire along the circumferential direction and a section of central line of the outer side central transverse groove (8) with the large end opening section close to the outer side central circumferential groove (3)₂；

The angle delta₁And the angle delta₂Has delta between₁＞δ₂And delta₁-δ₂The relation of less than or equal to 20 degrees.

8. the low noise all-terrain tire of claim 1, wherein: one end of a deep groove of the inner side shoulder transverse groove (5) is connected with one side of the inner side shoulder circumferential groove (1), one end of a deep groove of the outer side shoulder transverse groove (9) is connected with one side of the outer side shoulder circumferential groove (4), and one end of the deep groove of the inner side shoulder transverse groove (5) is arranged above the deep groove of the outer side shoulder transverse groove (9);

Depth H of the deep trench₁And the depth H of the shallow trench₂Between areThe relationship (2) of (c).

9. The low noise all-terrain tire of claim 8, wherein: the length of the deep groove of the inner shoulder transverse groove (5) in the tire width direction and the length of the deep groove of the outer shoulder transverse groove (9) in the tire width direction are both L₁The length of the shallow groove of the inner shoulder transverse groove (5) in the tire width direction and the length of the shallow groove of the outer shoulder transverse groove (9) in the tire width direction are both L₂；

The length L of the deep groove in the width direction of the tire₁The length L of the shallow trench in the width direction of the tire₂Between arethe relationship (2) of (c).

10. A low-noise all-road tire according to claim 8 or 9, wherein: included angles alpha are formed between the central line of the tire along the circumferential direction and a section of the central line of the inner shoulder transverse groove (5) of the shallow groove close to the inner shoulder circumferential groove (1), and between the central line of the tire along the circumferential direction and a section of the central line of the outer shoulder transverse groove (9) of the shallow groove close to the outer shoulder circumferential groove (4)₁included angles alpha are formed between the center line of the tire along the circumferential direction and a section of center line of the deep groove of the inner shoulder transverse groove (5) close to the inner shoulder circumferential groove (1), and between the center line of the tire along the circumferential direction and a section of center line of the deep groove of the outer shoulder transverse groove (9) close to the outer shoulder circumferential groove (4)₂；

The angle alpha₁and the included angle alpha₂Between is alpha₁＞α₂And alpha is₁-α₂The relation of less than or equal to 20 degrees.

Technical Field

The invention relates to the technical field of all-road-condition tires, in particular to a low-noise all-road-condition tire.

Background

Energy conservation and environmental protection are requirements for the current tire, noise generated by an automobile in the driving process is one of main sources of traffic noise, and tests show that the tire noise is one of main factors forming the driving noise of the automobile. When the running speed of the automobile is more than 50km/h, the noise of the tire gradually appears; when the vehicle speed exceeds 80km/h, the tire noise becomes a main component of the vehicle running noise. Further, the faster the vehicle speed and the larger the load, the higher the energy level of the tire noise and the larger the proportion of the tire noise to the vehicle running noise.

The tyre is the only part of the vehicle in contact with the ground, and the noise radiation and vibration characteristics of the tyre directly influence the riding comfort and the stability of the automobile. At present, the label law implemented in China stipulates the noise limit values of different types of tires, and most of the current domestic all-road-condition type tire products cannot meet the requirement of the limit value of the label law, so that the noise reduction of the products is trending.

Disclosure of Invention

The present invention is directed to a low noise all-terrain tire that solves the problems set forth in the background above.

In order to achieve the purpose, the invention provides the following technical scheme:

A low-noise all-road-condition tire comprises a tire tread, wherein the tire tread is provided with a circumferential groove along the circumferential direction of the tire and a transverse groove along the width direction of the tire, and the circumferential groove and the transverse groove divide the tire tread into a plurality of pattern blocks; the circumferential groove sequentially comprises an inner shoulder circumferential groove, an inner central circumferential groove, an outer central circumferential groove and an outer shoulder circumferential groove from inside to outside;

The transverse grooves sequentially comprise an inner shoulder transverse groove, an inner central transverse groove, a central transverse groove, an outer central transverse groove and an outer shoulder transverse groove from inside to outside;

The inner shoulder transverse groove and the outer shoulder transverse groove are both two-section transverse grooves comprising deep grooves and shallow grooves;

The inner side central transverse groove and the outer side central transverse groove are both horn-shaped transverse grooves;

The central transverse groove comprises a fold-shaped transverse groove and a transverse groove communicated with the transverse groove.

As a further scheme of the invention: the central transverse groove is located between the inner central circumferential groove and the outer central circumferential groove;

The two ends of the through transverse groove of the central transverse groove are respectively communicated with the inner side central circumferential groove and the outer side central circumferential groove, and the folded transverse groove of the central transverse groove crosses the through transverse groove and cuts the through transverse groove into two sections.

As a further scheme of the invention: the depth of the through transverse groove is smaller than that of the folded transverse groove, and an included angle beta is formed between the center line of the tire along the circumferential direction and a section of center line of the through transverse groove close to the inner side of the tire;

the included angle beta is more than 30 degrees and less than 70 degrees.

As a further scheme of the invention: the inner side central transverse groove and the outer side central transverse groove are both two-section horn-shaped transverse grooves;

The width of the small end opening of the inner side central transverse groove and the width of the small end opening of the outer side central transverse groove are both D₁The width of the large end opening of the inner side central transverse groove and the width of the large end opening of the outer side central transverse groove are both D₂And a width D of the small end opening₁And the width D of the large end opening₂between arethe relationship (2) of (c).

as a further scheme of the invention: the small end opening of the inner side central transverse groove is communicated with one side of the inner side central circumferential groove, the large end opening of the inner side central transverse groove is communicated with one side of the inner side shoulder circumferential groove, and the small end opening and the large end opening of the inner side central transverse groove are arranged at the upper part and the lower part in the width direction of the tire.

As a further scheme of the invention: the small end opening of the outer side central transverse groove is communicated with one side of the outer side central circumferential groove, the large end opening of the outer side central transverse groove is communicated with one side of the outer side shoulder circumferential groove, and the large end opening of the outer side central transverse groove is opened at the upper end and the lower end in the width direction of the tire.

As a further scheme of the invention: included angles delta are formed between the central line of the tire along the circumferential direction and a section of central line of the small end opening section of the inner side central transverse groove close to the inner side central circumferential groove, between the central line of the tire along the circumferential direction and a section of central line of the small end opening section of the outer side central transverse groove close to the outer side central circumferential groove₁The tire forms an included angle delta between the central line of the tire along the circumferential direction and a section of the central line of the inner side central transverse groove large end opening section close to the inner side central circumferential groove, and between the central line of the tire along the circumferential direction and a section of the central line of the outer side central transverse groove large end opening section close to the outer side central circumferential groove₂；

The angle delta₁And the angle delta₂Has delta between₁＞δ₂And delta₁-δ₂The relation of less than or equal to 20 degrees.

As a further scheme of the invention: one end of the deep groove of the inner side shoulder transverse groove is connected with one side of the inner side shoulder circumferential groove, one end of the deep groove of the outer side shoulder transverse groove is connected with one side of the outer side shoulder circumferential groove, and one end of the deep groove of the inner side shoulder transverse groove is arranged above the other end of the deep groove of the outer side shoulder transverse groove;

Depth H of the deep trench₁And the depth H of the shallow trench₂Between areThe relationship (2) of (c).

As a further scheme of the invention: the length of the deep groove of the inner shoulder transverse groove in the tire width direction and the length of the deep groove of the outer shoulder transverse groove in the tire width direction are both L₁The length of the shallow trench of the inner shoulder transverse groove in the tire width direction and the length of the shallow trench of the outer shoulder transverse groove in the tire width direction are both L₂；

The deep groove is arranged in the tireLength L in width direction₁The length L of the shallow trench in the width direction of the tire₂Between arethe relationship (2) of (c).

As a further scheme of the invention: included angles alpha are formed between the central line of the tire along the circumferential direction and a section of the central line of the inner shoulder transverse groove, close to the inner shoulder circumferential groove, of the shallow groove, and between the central line of the tire along the circumferential direction and a section of the central line of the outer shoulder transverse groove, close to the outer shoulder circumferential groove, of the shallow groove₁Included angles alpha are formed between the center line of the tire along the circumferential direction and a section of center line of the deep groove of the inner shoulder transverse groove, which is close to the inner shoulder circumferential groove, and between the center line of the tire along the circumferential direction and a section of center line of the deep groove of the outer shoulder transverse groove, which is close to the outer shoulder circumferential groove₂；

The angle alpha₁And the included angle alpha₂Between is alpha₁＞α₂And alpha is₁-α₂The relation of less than or equal to 20 degrees.

Compared with the prior art, the invention has the beneficial effects that:

The tire tread is provided with a plurality of circumferential grooves along the circumferential direction and a plurality of transverse grooves along the width direction of the tire, so that the tire tread keeps the characteristics of larger pattern blocks, deeper grooves and the like, the tire can use various different road surfaces, and has good passing performance, drainage performance and ground gripping performance; meanwhile, the transverse grooves are reasonably distributed on the tire surface of the tire, and the shapes and the angles of the transverse grooves are reasonably distributed, so that the purpose of reducing the noise generated by the tire in the driving process under the condition of keeping the original performance of the tire unchanged is achieved, the noise limit value of the tire under the whole road condition is met, and the riding comfort and the stability of the automobile are improved.

the method comprises the following steps: (1) the central transverse groove is set into a two-section structure comprising a through groove and a folded transverse groove, and an included angle beta formed between the central line of the tire along the circumferential direction and a section of central line of the through transverse groove close to the inner side of the tire is limited within the range of 30 degrees < beta < 70 degrees, so that the noise generated when the tire tread is grounded along the circumferential middle position is reduced;

(2) By defining the width D of the small end opening of the central transverse groove₁And the width D of the large end opening₂Ratio of (a) to (b)In the range of 0.3-0.7 and defining an included angle delta₁At an angle delta from₂Has delta between₁＞δ₂And delta₁-δ₂The relation of less than or equal to 20 degrees reduces the noise generated when the tire runs and is grounded on the ground between the inner shoulder circumferential groove and the inner central circumferential groove and the ground between the outer central circumferential groove and the outer shoulder circumferential groove;

(3) By defining the depth H of the deep trench₁depth H of shallow trench₂Ratio of (a) to (b)In the range of 0.3-0.7, and defines the length L of the deep groove in the width direction of the tire₁Length L of the shallow groove in the width direction of the tire₂Ratio of (a) to (b)Within the range of 0.5-0.9 and an included angle alpha₁And angle alpha₂The difference between them alpha₁-α₂The angle is less than or equal to 20 degrees, and the noise generated when the tire is grounded in a running process, wherein the ground contact surface of the inner shoulder circumferential groove close to the inner side of the tire, and the ground contact surface of the outer shoulder circumferential groove close to the outer side of the tire are reduced;

(4) By defining angles beta and alpha₁、α₂、δ₁、δ₂In the opposite direction, keeping beta and alpha₁、α₂、δ₁And delta₂Under the condition that the value range is not changed, the noise generated in the running process of the tire is further reduced, so that the tire under the whole road condition can meet the noise limit value of the tire under the whole road condition by a label methodThe noise generated when the tire runs at different speeds is improved, the noise energy level of the tire under the whole road condition is reduced, and the using effect of the tire is improved.

Drawings

FIG. 1 is a partial schematic view one of the treads of the tire of the present invention;

FIG. 2 is a second partial schematic view of a tire tread of the present invention;

FIG. 3 is a third schematic partial view of a tire tread of the present invention.

In the figure:

1-inner shoulder circumferential groove, 2-inner central circumferential groove, 3-outer central circumferential groove, 4-outer shoulder circumferential groove;

5-medial shoulder transverse groove, 6-medial central transverse groove, 7-central transverse groove, 8-lateral central transverse groove, 9-lateral shoulder transverse groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a low-noise all-terrain tire includes a tread, the tread is provided with a circumferential groove along a circumferential direction of the tire, and is provided with a transverse groove along a width direction of the tire, and the circumferential groove and the transverse groove divide the tread into a plurality of pattern blocks; the circumferential groove sequentially comprises an inner shoulder circumferential groove 1, an inner central circumferential groove 2, an outer central circumferential groove 3 and an outer shoulder circumferential groove 4 from inside to outside; the transverse grooves sequentially comprise an inner shoulder transverse groove 5, an inner central transverse groove 6, a central transverse groove 7, an outer central transverse groove 8 and an outer shoulder transverse groove 9 from inside to outside; the inner shoulder transverse groove 5 and the outer shoulder transverse groove 9 are both two-section transverse grooves comprising deep grooves and shallow grooves; the inner central transverse groove 6 and the outer central transverse groove 8 are both horn-shaped transverse grooves;

the central transverse groove 7 comprises a fold-shaped transverse groove and a transverse groove penetrating through the transverse groove.

The tire tread is provided with an inner shoulder circumferential groove 1, an inner central circumferential groove 2, an outer central circumferential groove 3 and an outer shoulder circumferential groove 4 along the circumferential direction, and is provided with an inner shoulder transverse groove 5, an inner central transverse groove 6, a central transverse groove 7, an outer central transverse groove 8 and an outer shoulder transverse groove 9 along the width direction of the tire, so that the circumferential grooves and the transverse grooves sequentially define a plurality of inner shoulder blocks, inner side central blocks, middle blocks, outer side central blocks and outer shoulder blocks, and the tire tread keeps the characteristics of larger pattern blocks, deeper groove depth and the like, so that the tire can use various different road surfaces and has good passing performance, drainage performance and ground gripping performance; meanwhile, the inner side shoulder transverse groove 5 and the outer side shoulder transverse groove 9 are both set to be two-section type transverse grooves comprising a deep groove and a shallow groove, the inner side center transverse groove 6 and the outer side center transverse groove 8 are both set to be horn-shaped transverse grooves, and the center transverse groove 7 is set to be a transverse groove comprising a folded transverse groove and a through transverse groove, so that the whole layout of all the transverse grooves on the tire tread is reasonable, the shapes of all the transverse grooves are reasonably configured, the purpose of reducing the noise generated in the running process of the tire under the condition of keeping the original performance of the tire unchanged is achieved, namely, the energy level of the tire noise is reduced, and the requirements of the noise limit value of the tire under the whole road condition are met.

With reference to fig. 2 and 3, the central transverse groove 7 is located between the inner central circumferential groove 2 and the outer central circumferential groove 3; the two ends of the through transverse groove of the central transverse groove 7 are respectively communicated with the inner side central circumferential groove 2 and the outer side central circumferential groove 3, and the folded transverse groove of the central transverse groove 7 crosses the through transverse groove and cuts the through transverse groove into two sections.

The depth of the through transverse groove is smaller than that of the folded transverse groove, and an included angle beta is formed between the center line of the tire along the circumferential direction and a section of center line of the through transverse groove close to the inner side of the tire; the included angle beta is more than 30 degrees and less than 70 degrees.

The central transverse groove 7 is set to be a structure comprising a through groove and a folded transverse groove, the depth of the through transverse groove is limited to be smaller than that of the folded transverse groove, good drainage performance and ground gripping performance of the tire can be ensured, meanwhile, an included angle beta formed between a central line of the tire along the circumferential direction and a section of central line of the through transverse groove close to the inner side of the tire is limited to be within a range of more than 30 degrees and less than 70 degrees, namely, the angle of the central transverse groove 7 is reasonably set to form and reasonably configure the structure, and noise generated when the tire tread is grounded along the circumferential middle position is reduced.

Referring to fig. 2 and 3, the inner central transverse groove 6 and the outer central transverse groove 8 are both two-segment horn-shaped transverse grooves;

The small end opening of the inner central lateral groove 6 communicates with one side of the inner central circumferential groove 2, the large end opening of the inner central lateral groove 6 communicates with one side of the inner shoulder circumferential groove 1, and the small end opening of the inner central lateral groove 6 is open at the upper and lower sides in the tire width direction.

The small end opening of the outer central lateral groove 8 communicates with one side of the outer central circumferential groove 3, the large end opening of the outer central lateral groove 8 communicates with one side of the outer shoulder circumferential groove 4, and the large end opening of the outer central lateral groove 8 opens downward at the upper and lower ends in the tire width direction.

By providing the inner central lateral groove 6 and the outer central lateral groove 8 as two lateral grooves that are symmetrical about the center, it is possible to reduce noise generated when the tire is in driving contact with the ground between the inner shoulder circumferential groove 1 and the inner central circumferential groove 2, and the ground between the outer central circumferential groove 3 and the outer shoulder circumferential groove 4 to some extent while ensuring good drainage performance and grip performance of the tire during driving.

The width of the small end opening of the inner central transverse groove 6 and the width of the small end opening of the outer central transverse groove 8 are both D₁Of said inner central transverse groove 6The width of the large end opening and the width of the large end opening of the outer side central transverse groove 8 are both D₂. In order to further reduce noise generated when the tire is in running contact with the ground between the inner shoulder circumferential groove 1 and the inner central circumferential groove 2 and the ground between the outer central circumferential groove 3 and the outer shoulder circumferential groove 4, the width D of the small-end opening is defined₁And the width D of the large end opening₂Between areThe relationship (2) of (c).

please refer to the following table one:

From table one, it can be seen that: when the width D of the small end opening is reduced₁And the width D of the large end opening₂Ratio of (a) to (b)When the width is limited to 0.3 to 0.7, the noise generated during the running of the tire is small, and the noise generated during the running ground of the tire in the ground contact between the inner shoulder circumferential groove 1 and the inner central circumferential groove 2 and the ground contact between the outer central circumferential groove 3 and the outer shoulder circumferential groove 4 is further reduced, that is, the noise generated during the running of the tire as a whole is further improved.

Included angles delta are formed between the central line of the tire along the circumferential direction and a section of central line of the small end opening section of the inner side central transverse groove 6 close to the inner side central circumferential groove 2 and between the central line of the tire along the circumferential direction and a section of central line of the small end opening section of the outer side central transverse groove 8 close to the outer side central circumferential groove 3₁An included angle delta is formed between the central line of the tire along the circumferential direction and a section of central line of the inner side central transverse groove 6 with the large end opening section close to the inner side central circumferential groove 2, and between the central line of the tire along the circumferential direction and a section of central line of the outer side central transverse groove 8 with the large end opening section close to the outer side central circumferential groove 3₂. To further reduce the tyre insidenoise generated when the ground surface between the side shoulder circumferential groove 1 and the inner side central circumferential groove 2 and the ground surface between the outer side central circumferential groove 3 and the outer side shoulder circumferential groove 4 are grounded during running is generated by limiting the included angle delta₁And the angle delta₂Has delta between₁＞δ₂And delta₁-δ₂The relation of less than or equal to 20 degrees.

Please see table two below:

as can be seen from Table II: when making the included angle delta₁At an angle delta from₂Is defined as delta₁＞δ₂and delta₁-δ₂when the angle is less than or equal to 20 degrees, the noise generated during the running of the tire is smaller, and the noise generated during the running grounding of the tire between the inner shoulder circumferential groove 1 and the inner central circumferential groove 2 and the noise generated during the running grounding of the tire between the outer central circumferential groove 3 and the outer shoulder circumferential groove 4 are further reduced, so that the noise generated during the running of the whole tire is further improved.

Referring to fig. 2 and 3, one end of the deep trench of the inner shoulder transverse trench 5 is connected to one side of the inner shoulder circumferential trench 1, one end of the deep trench of the outer shoulder transverse trench 9 is connected to one side of the outer shoulder circumferential trench 4, and one end of the deep trench of the inner shoulder transverse trench 5 is above and one end of the deep trench of the outer shoulder transverse trench 9 is below; depth H of the deep trench₁And the depth H of the shallow trench₂Between areThe relationship (2) of (c).

by arranging the inner shoulder lateral grooves 5 and the outer shoulder lateral grooves 9 symmetrically with respect to the center, it is possible to ensure good grip performance and drainage performance of the tire during running, and at the same time, see table three:

From the third table, it can be seen that: by defining the depth H of the deep trench₁depth H of shallow trench₂ratio of (a) to (b)Within the range of 0.3 to 0.7, the noise generated during the running of the tire is small, and the noise generated during the running ground of the tire in the ground contact surface of the inner shoulder circumferential groove 1 close to the inner side of the tire and the noise generated during the running ground of the ground contact surface of the outer shoulder circumferential groove 4 close to the outer side of the tire are reduced, so that the noise generated during the running of the whole tire is improved.

The length of the deep groove of the inside shoulder lateral groove 5 in the tire width direction and the length of the deep groove of the outside shoulder lateral groove 9 in the tire width direction are both L₁The length of the shallow groove of the inner shoulder transverse groove 5 in the tire width direction and the length of the shallow groove of the outer shoulder transverse groove 9 in the tire width direction are both L₂. In order to further reduce the noise generated when the tire is in running contact with the ground surface of the inner shoulder circumferential groove 1 close to the inner side of the tire and the ground surface of the outer shoulder circumferential groove 4 close to the outer side of the tire, the length L of the deep groove in the tire width direction is defined₁The length L of the shallow trench in the width direction of the tire₂Between areThe relationship (2) of (c).

Please see table four:

As can be seen from Table four: by defining the length L of the deep groove in the width direction of the tire₁length L of the shallow groove in the width direction of the tire₂ratio of (a) to (b)When the content is in the range of 0.5-0.9, the tire is produced during runningthe noise is less, the noise generated when the tire is in the ground contact surface of the inner shoulder circumferential groove 1 close to the inner side of the tire and the noise generated when the tire is in the ground contact surface of the outer shoulder circumferential groove 4 close to the outer side of the tire during running is further reduced, and the noise generated in the whole tire during running is further improved.

And included angles alpha are formed between the center line of the tire along the circumferential direction and a section of the center line of the inner shoulder transverse groove 5, close to the inner shoulder circumferential groove 1, of the shallow groove, and between the center line of the tire along the circumferential direction and a section of the center line of the outer shoulder transverse groove 9, close to the outer shoulder circumferential groove 4, of the shallow groove₁Included angles alpha are formed between the center line of the tire along the circumferential direction and a section of center line of the deep groove of the inner shoulder transverse groove 5, which is close to the inner shoulder circumferential groove 1, and between the center line of the tire along the circumferential direction and a section of center line of the deep groove of the outer shoulder transverse groove 9, which is close to the outer shoulder circumferential groove 4₂。

In order to further reduce the noise generated when the tire is in the ground contact with the inner shoulder circumferential groove 1 close to the inner side of the tire and the ground contact with the outer shoulder circumferential groove 4 close to the outer side of the tire during running, the included angle alpha is defined₁And angle alpha₂Between is alpha₁＞α₂And alpha is₁-α₂the relation of less than or equal to 20 degrees.

Please see table five:

From table five, it can be seen that: by defining an included angle alpha₁And angle alpha₂The difference between them alpha₁-α₂when the angle is less than or equal to 20 degrees, the noise generated when the tire runs is less than 74dB, namely the noise generated by the tire at the moment is less, and the noise generated when the tire runs and is grounded by the grounding surface of the inner shoulder circumferential groove 1 close to the inner side of the tire and the grounding surface of the outer shoulder circumferential groove 4 close to the outer side of the tire is further reduced, namely the noise generated by the whole tire in the running process is further improved.

according to the invention, the inner side shoulder transverse groove 5 and the outer side shoulder transverse groove 9 are set to be two-section transverse grooves comprising a deep groove and a shallow groove, the inner side central transverse groove 6 and the outer side central transverse groove 8 are set to be two-section horn-shaped transverse grooves, and the central transverse groove 7 is set to be a transverse groove comprising a folded transverse groove and a through transverse groove, so that the through transverse groove is also a two-section transverse groove, the angles of the transverse grooves are reasonably configured, the noise generated by the tire in the whole ground contact surface in the driving process is reduced, and the noise generated by the tire in the whole driving process is greatly improved. Further, an angle α formed by the tire circumferential direction center line being close to the tire outer side is set₁、α₂、δ₁And delta₂Is positive such that an angle beta with a tire circumferential center line near the inner side of the tire is negative, i.e., defines an angle alpha₁、α₂、δ₁And delta₂In contrast to the direction between the angles β, see table six below:

From table six, it can be seen that: when the angles beta and alpha are₁、α₂、δ₁、δ₂When the directions are opposite, the noise generated when the tire runs is less than 74 dB; when the angles beta and alpha are equal₁、α₂、δ₁、δ₂When the direction is the same, the noise generated when the tire runs is larger than 74 dB. By contrast, the values of beta and alpha are limited₁、α₂、δ₁and delta₂Under the condition of unchanged value range, the angles beta and alpha are enabled to be₁、α₂、δ₁、δ₂When the directions are opposite, the noise generated by the tire at the moment is small, the noise generated by the tire in the running process is reduced, the all-road-condition tire can further meet the regulation of a label method on the noise limit value of the all-road-condition tire, the noise generated when the tire runs at different speeds is further improved, the noise energy level of the all-road-condition tire is reduced, and the using effect of the tire is improved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.