CN107160948B - Tire tread pattern structure for motor two-wheeled vehicle - Google Patents
Tire tread pattern structure for motor two-wheeled vehicle Download PDFInfo
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- CN107160948B CN107160948B CN201710442597.9A CN201710442597A CN107160948B CN 107160948 B CN107160948 B CN 107160948B CN 201710442597 A CN201710442597 A CN 201710442597A CN 107160948 B CN107160948 B CN 107160948B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1259—Depth of the sipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1272—Width of the sipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The invention discloses a pneumatic tire tread pattern structure for a motorcycle, which consists of a plurality of pattern units symmetrically and alternately arranged along the equatorial plane of a tire, wherein each pattern unit comprises a main pattern groove and an auxiliary pattern groove; the main pattern groove comprises a first main pattern groove close to the equatorial plane, a third main pattern groove close to the tire shoulder and a second main pattern groove connecting the first main pattern groove and the third main pattern groove, the auxiliary pattern groove comprises a first auxiliary pattern groove far away from the first main pattern groove, a third auxiliary pattern groove close to the tire shoulder and a second auxiliary pattern groove connecting the first auxiliary pattern groove and the third auxiliary pattern groove, the main pattern groove and the auxiliary pattern groove are axially inclined and arranged towards the tire shoulder from being close to the equatorial plane, the pattern groove is front and rear, the width of the tail end is reduced, the main pattern groove and the front and rear end of the auxiliary pattern groove are additionally provided with expansion grooves, and the dry wet land driving control performance and the ground gripping performance can be taken into consideration.
Description
Technical Field
The invention relates to a pneumatic tire of a two-wheeled vehicle, in particular to a tread pattern structure of the pneumatic tire for the two-wheeled vehicle.
Background
Along with the continuous improvement of the domestic living standard, the market has increased year by year demand for leisure and entertainment large-displacement motorcycles in recent years, the large-displacement motorcycles are popular with more and more consumers, most drivers have higher requirements on the whole vehicle performance, and especially have higher requirements on the whole vehicle control performance, the ground gripping capability of tires and the over-bending stability. In the conventional large-displacement motor vehicle tire, in order to ensure the handling performance of the tire when the tire runs on dry ground, the tread is generally provided with an inclined groove-shaped pattern with a high land ratio (the land ratio is that the total area of a certain region of the tread is s, the block area of the region is a, the ratio of the block area a of the region to the total area s of the region is called the land ratio i of the region, namely, i = a/s.), and the inclined groove-shaped pattern with the high land ratio has few drainage channels and is easy to generate a slip phenomenon due to insufficient gripping force when the tire runs on wet ground. In order to ensure the grip performance of the tire when running on wet ground, the tread surface is generally provided with a low land ratio oblique groove pattern having a large number of drainage channels but a small contact surface, and therefore, when running on dry ground, the tire has poor handling performance and poor running stability. In order to satisfy both of the dry and wet steering and the grip performance, various studies have been made in the past, and as shown in fig. 6, a regular "eight" shaped inclined groove group 10 'is disposed on the tread surface to improve the wet grip performance, and an inverted "eight" shaped inclined groove group 20' is disposed in the traveling direction appropriately to exert the edge effect, and the combination of these two designs reduces the tread rigidity, reduces the steering stability when the vehicle is traveling straight and turning, and impairs the safety when the vehicle is traveling.
Based on the above problems, an optimized tread pattern structure of a pneumatic tire for a motorcycle is designed.
Disclosure of Invention
The invention aims to provide a pneumatic tire tread pattern structure for a motorcycle, which ensures the coexistence of dry performance and wet performance, particularly the coexistence of the wet gripping performance and the control performance at a higher level, and improves the safety of the pneumatic tire tread pattern structure used on various road surfaces.
In order to achieve the above purpose, the solution of the invention is:
a pneumatic tire tread pattern structure for a motorcycle, the tire tread comprising a plurality of pattern elements symmetrically disposed in a staggered manner along an equatorial plane of the tire, each pattern element comprising a main groove extending obliquely from near the equatorial plane to a tire shoulder and a sub groove disposed between two adjacent main grooves, the main groove comprising a first main groove near the equatorial plane, a third main groove near the tire shoulder and a second main groove connecting the first main groove and the third main groove, the sub groove comprising a first sub groove far from the first main groove, a third sub groove near the tire shoulder and a second sub groove connecting the first sub groove and the third sub groove; wherein: the main grooves and the auxiliary grooves from the position close to the equatorial plane to the tire shoulder are arranged from large to small in axial inclination angle, and the groove widths of the first main groove and the first auxiliary groove close to the equatorial plane, the groove widths of the third main groove and the third auxiliary groove close to the tire shoulder are reduced; meanwhile, expansion grooves are added on the first main groove, the first auxiliary groove, the third main groove and the third auxiliary groove.
The fall angle of each axial inclination angle of each main groove and each auxiliary groove from the position close to the equatorial plane to the tire shoulder is 10-30 degrees.
An inner expanding groove is added on the inner side in the axial direction of a first main groove in the main grooves, and an inner expanding groove and an outer expanding groove are respectively added on the inner side and the outer side in the axial direction of a third main groove; the expansion grooves of the first main grooves extend from the position close to the equatorial plane to the inner side of the second main grooves and are connected with each other; the inner expanding groove and the outer expanding groove are connected in an expanding mode from the tail end of the third main groove to the tail end of the second main groove, and the inner expanding groove and the outer expanding groove are triangular respectively.
The width of the expansion groove, the width of the inner expansion groove and the width of the outer expansion groove of the first main groove are 0.8-5 mm, and the ratio of the depth of the first main groove to the depth of the main groove is 0.1-0.35.
An inner expansion groove is added on the inner side in the axial direction of a first auxiliary pattern groove in the auxiliary pattern grooves, and a triangular inner expansion groove and a triangular outer expansion groove are added on the inner side and the outer side in the axial direction of a third auxiliary pattern groove; the expansion groove of first pair pattern groove extends and is connected from the inboard of the vice pattern groove of second toward the front end of first pair pattern groove, and interior expansion groove, outer expansion groove are from the tail end of the vice pattern groove of third toward the tail end of the vice pattern groove of second toward outer expansion and are connected, and interior expansion groove, outer expansion groove are triangle-shaped respectively.
The width of the expansion groove, the width of the inner expansion groove and the width of the outer expansion groove of the first secondary groove are 0.8-5 mm, and the ratio of the depth of the first secondary groove to the depth of the secondary groove is 0.1-0.35.
The section of the first main groove near the tail end of the inner side in the axial direction of the first main groove and the section of the front end of the adjacent first main groove on the other side are added with wavy thin grooves, and the section of the front end of the first main groove and the section of the front end of the adjacent auxiliary groove on the other side are added with wavy thin grooves.
The side wall of the wavy thin groove is formed by combining a straight line and a wavy line, the upper section of groove wall is arranged in a straight line, and the lower section of groove wall is arranged in a wavy line.
The ratio of the depth of the upper-section straight line groove in the thin groove to the depth of the lower-section wave groove is 0.5-0.85, and the width of the upper-section straight line groove is smaller than or equal to the width of the lower-section wave groove.
The invention is mainly improved by the optimized design of the tread pattern structure of the tire, the tire tread is composed of a plurality of pattern units symmetrically and alternately arranged along the circumferential direction of the tire, each pattern unit comprises a main pattern groove and an auxiliary pattern groove, the main pattern groove and the auxiliary pattern groove are arranged from the position close to the equatorial plane to the tire shoulder in an axially inclined and variable angle mode, the groove widths of the front end and the tail end of the pattern groove are arranged in a reducing mode, when the tire runs dry, the axial inclined angles of the main pattern groove and the auxiliary pattern groove from the position close to the equatorial plane to the tire shoulder are arranged from large to small, the straight driving stability and the over-bending ground gripping performance can be ensured, meanwhile, the groove widths of the main pattern groove and the auxiliary pattern groove are arranged in a mode that the two ends are narrow and the middle is wide, the tread rigidity can be ensured, and the driving stability of the straight driving and the over-bending can be improved. The expansion grooves are additionally arranged at the front and the tail ends of the main groove and the auxiliary groove, the expansion grooves are arranged at the front ends of the main groove and the auxiliary groove close to the inner side in the axial direction, so that the control performance during straight running on dry ground can be ensured, and the ground gripping performance during straight running on the wetland can be improved. The tail ends of the main groove and the auxiliary groove are provided with triangular expansion grooves close to the inner side and the outer side of the axial direction, so that the edge effect can be increased, the over-bent wet land gripping performance is improved, the depth of the expansion grooves and the depth of the main groove and the auxiliary groove are arranged in a high fall mode, the tread rigidity can be ensured, and the control performance and the land gripping performance of the dry land and the wet land are improved. Meanwhile, the fine grooves with the wavy teeth on the cross sections are added between the main grooves and the auxiliary grooves, the main grooves are crosslinked by the fine grooves, the straight traction performance can be further improved, the ground gripping performance of the wetland is improved, meanwhile, the auxiliary grooves are connected in series, the drainage branches can be increased, and the ground gripping performance of the wetland is further improved.
Drawings
FIG. 1 is a schematic view of a tire tread pattern configuration according to an embodiment of the present invention;
FIG. 2 is a schematic view of the arrangement of the primary and secondary grooves of a tire tread pattern according to an embodiment of the present invention;
FIG. 3 is a schematic view of the arrangement of the main and auxiliary grooves with expanding grooves of the tire tread pattern according to the embodiment of the present invention;
FIG. 4 isbase:Sub>A cross-sectional view A-A' of FIG. 3;
FIG. 5 is a cross-sectional view B-B' of FIG. 1;
FIG. 6 is a schematic view showing a tread pattern arrangement of a conventional tire.
Detailed Description
Embodiments of the present invention are explained below with reference to the drawings:
as shown in fig. 1 to 5, the present invention discloses a tread pattern structure of a pneumatic tire for a motorcycle, in which a lateral direction is a tire axial direction, a vertical direction is a tire circumferential direction, CL is an equatorial plane, and an arrow indicates a running direction of the tire.
As shown in FIG. 2, the tire tread 1 is composed of a plurality of pattern units symmetrically and alternately arranged along the tire equatorial plane, each pattern unit comprises a main groove 10 and a secondary groove 20, the main groove 10 obliquely extends from the position close to the equatorial plane to the tire shoulder and consists of a first main groove 10a close to the equatorial plane, a third main groove 10c close to the tire shoulder and a second main groove 10b connecting the first main groove 10a and the third main groove 10c, wherein each main groove from the position close to the equatorial plane to the tire shoulder is arranged from large to small with an axial inclination angle alpha, and the groove width of the front end of the first main groove 10a close to the equatorial plane and the groove width of the tail end of the third main groove 10c close to the tire shoulder are arranged in a decreasing manner along the direction. The auxiliary grooves 20 are arranged between two adjacent main grooves 10 and are composed of a first auxiliary groove 20a far away from the first main groove 10a, a third auxiliary groove 20c close to the tire shoulder and a second auxiliary groove 20b connecting the first auxiliary groove 20a and the third auxiliary groove 20c, the axial inclination angle beta of each auxiliary groove from the position close to the equatorial plane to the tire shoulder is also arranged from large to small, the groove width of the front end of the first main groove 20a close to the equatorial plane and the groove width of the tail end of the third main groove 20c close to the tire shoulder along the direction of the tire shoulder are arranged in a reducing mode, and the fall angle of each axial inclination angle alpha and beta of each main groove and each auxiliary groove from the position close to the equatorial plane to the tire shoulder is preferably 10-30 degrees. By the arrangement, when the tire runs dry, the axial inclination angles of the main groove and the auxiliary groove from the position close to the equatorial plane to the tire shoulder are arranged from large to small, so that the straight driving control stability and the over-bending ground gripping performance can be ensured, and meanwhile, the groove widths of the main groove and the auxiliary groove are arranged in a mode of narrow two ends and wide middle, so that the tread rigidity can be ensured, and the control stability of straight driving and over-bending is improved.
As shown in fig. 3 and 4, in order to achieve both the dry and wet driving controllability and the ground gripping performance, an inner expanding groove 11 is added on the axially inner side of a first main groove 10a in the main groove 10, inner and outer expanding grooves 12 and 13 are respectively added on the axially inner side and the axially outer side of a third main groove 10c in the main groove 10, the expanding groove 11 of the first main groove 10a in the main groove 10 is arranged on the axially inner side and extends from the position close to the equatorial plane to the inner side of a second main groove 10b and is connected, the expanding width W1 of the expanding groove 11 is 0.8mm to 5mm, the inner and outer expanding grooves 12 and 13 are expanded from the tail end of the third main groove 10c to the tail end of the second main groove 10b and are connected, the expanding grooves 12 and 13 are triangular on both sides, the expanding widths W2 and W3 of the expanding grooves 12 and 13 are respectively 0.8mm to 5mm, and the ratio of the depths of the expanding grooves 11, 12 and 13 to the main groove 10H 1 is 0.35. If the width of the expansion groove is too large and the depth thereof is too deep, the steering performance during dry running is affected, and if the width of the expansion groove is too small and the depth thereof is too shallow, the grip performance during wet running is affected. Similarly, an inner expanding groove 21 is added to the axially inner side of a first sub groove 20a in the sub groove 20, triangular inner and outer expanding grooves 22, 23 are added to the axially inner and outer sides of a third sub groove 20c in the sub groove 20, the expanding groove 21 of the first sub groove 20a in the sub groove 20 is arranged axially inner side, extends from the inner side of the second sub groove 20b to the front end of the first sub groove 20a and is connected thereto, the expanding width W4 of the expanding groove 21 is 0.8mm to 5mm, the inner and outer expanding grooves 22, 23 are expanded from the tail end of the third sub groove 20c to the tail end of the second sub groove 20b and are connected thereto, the expanding grooves 22, 23 are triangular, the expanding widths W5, W6 of the two side expanding grooves 22, 23 are 0.8 to 5mm, respectively, and the ratio of the depth H1 of each expanding groove 21, 22, 23 to the depth H of the sub groove 20 is 0.1 to 0.35. The front ends of the main and auxiliary pattern grooves are provided with the expansion grooves close to the inner sides in the axial direction, so that the control performance when the wetland straightly moves dry land can be ensured, and the ground gripping performance when the wetland straightly moves is improved. The tail ends of the main pattern groove and the auxiliary pattern groove are provided with triangular expansion grooves close to the inner side and the outer side of the axial direction, so that the edge effect can be increased, the grip performance of the over-bent wetland is improved, and meanwhile, the depth of the expansion grooves on the main pattern groove and the auxiliary pattern groove is arranged in a high fall way, so that the rigidity of the tread can be ensured, and the control performance and the grip performance of the dry and wetland are improved.
As shown in fig. 1 and 5, in order to further improve the dry and wet grip performance, the end of the first main groove 10a on the inner side in the axial direction among the main grooves 10 and the front end of the first main groove 10a adjacent to the other side are added with fine grooves 30 having a wavy cross section, and the front end of the first main groove 10a and the front end of the sub groove 20 adjacent to the other side are added with fine grooves 40 having a wavy cross section, the side walls of the wavy fine grooves 30 and 40 are formed by combining straight lines and wavy lines, the upper groove wall is provided with a straight line, and the lower groove wall is provided with a wavy line. The ratio of the depth H2 of the upper linear groove to the depth H3 of the lower wave groove in the thin grooves 30 and 40 is 0.5 to 0.85, the width W7 of the upper linear groove is smaller than or equal to the width W8 of the lower wave groove, the width W7 of the upper linear groove and the width W8 of the lower wave groove are designed to be equal in width, and the thin groove 30 and the thin groove 40 are connected to form an inclined 7 shape, so that the tread rigidity can be ensured, and the ground gripping performance of the wetland can be improved. By the arrangement, the main pattern grooves and the auxiliary pattern grooves on the two sides of the tread are crosslinked by the thin grooves, so that drainage branches can be increased, and the wet land gripping performance is further improved.
The tire of the example of the present invention is superior to the conventional example in both the handling performance and the wet grip performance after the technique of the present invention is used.
The above description is only exemplary of the present invention and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above exemplary embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (7)
1. A pneumatic tire tread pattern structure for a motorcycle, the tire tread comprising a plurality of pattern elements symmetrically disposed in a staggered manner along an equatorial plane of the tire, each pattern element comprising a main groove extending obliquely from near the equatorial plane to a tire shoulder and a sub groove disposed between two adjacent main grooves, the main groove comprising a first main groove near the equatorial plane, a third main groove near the tire shoulder and a second main groove connecting the first main groove and the third main groove, the sub groove comprising a first sub groove far from the first main groove, a third sub groove near the tire shoulder and a second sub groove connecting the first sub groove and the third sub groove; the method is characterized in that: the main grooves and the auxiliary grooves from the position close to the equatorial plane to the tire shoulder are arranged from large to small in axial inclination angle, and the groove widths of the first main groove and the first auxiliary groove close to the equatorial plane, the groove widths of the third main groove and the third auxiliary groove close to the tire shoulder are reduced; simultaneously, expanding grooves are added on the first main groove, the first auxiliary groove, the third main groove and the third auxiliary groove; the fall angle of each axial inclination angle of each main groove and each auxiliary groove from the position close to the equatorial plane to the tire shoulder is 10-30 degrees; an inner expanding groove is added on the axial inner side of a first main groove in the main grooves, and an inner expanding groove and an outer expanding groove are respectively added on the axial inner side and the axial outer side of a third main groove; the expansion grooves of the first main grooves extend from the position close to the equatorial plane to the inner side of the second main grooves and are connected with each other; the inner expanding groove and the outer expanding groove are connected in an expanding mode from the tail end of the third main groove to the tail end of the second main groove, and the inner expanding groove and the outer expanding groove are triangular respectively.
2. A pneumatic tire tread pattern structure for a motorcycle as claimed in claim 1, wherein: the widths of the expansion groove, the inner expansion groove and the outer expansion groove of the first main groove are 0.8to 5mm, and the ratio of the depth of the first main groove to the depth of the main groove is 0.1 to 0.35.
3. A tread pattern structure of a pneumatic tire for a motorcycle according to claim 1, wherein: an inner expansion groove is added on the inner side in the axial direction of a first auxiliary pattern groove in the auxiliary pattern grooves, and a triangular inner expansion groove and a triangular outer expansion groove are added on the inner side and the outer side in the axial direction of a third auxiliary pattern groove; the expansion groove of first pair pattern groove extends and is connected from the inboard of the vice pattern groove of second toward the front end of first pair pattern groove, and interior expansion groove, outer expansion groove are from the tail end of the vice pattern groove of third toward the tail end of the vice pattern groove of second toward outer expansion and are connected, and interior expansion groove, outer expansion groove are triangle-shaped respectively.
4. A pneumatic tire tread pattern structure for a motorcycle as claimed in claim 3, wherein: the width of the expansion groove, the width of the inner expansion groove and the width of the outer expansion groove of the first secondary groove are 0.8-5 mm, and the ratio of the depth of the first secondary groove to the depth of the secondary groove is 0.1-0.35.
5. A tread pattern structure of a pneumatic tire for a motorcycle according to claim 1 or 3, wherein: the section of the first main groove near the tail end of the inner side in the axial direction of the first main groove and the section of the front end of the adjacent first main groove on the other side are added with wavy thin grooves, and the section of the front end of the first main groove and the section of the front end of the adjacent auxiliary groove on the other side are added with wavy thin grooves.
6. The pneumatic tire tread pattern structure for a motorcycle of claim 5, wherein: the side wall of the wavy thin groove is formed by combining a straight line and a wavy line, the upper section of groove wall is arranged in a straight line, and the lower section of groove wall is arranged in a wavy line.
7. A pneumatic tire tread pattern structure for a motorcycle as claimed in claim 6, wherein: the ratio of the depth of the upper-section straight line groove in the thin groove to the depth of the lower-section wave groove is 0.5-0.85, and the width of the upper-section straight line groove is smaller than or equal to the width of the lower-section wave groove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710442597.9A CN107160948B (en) | 2017-06-13 | 2017-06-13 | Tire tread pattern structure for motor two-wheeled vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710442597.9A CN107160948B (en) | 2017-06-13 | 2017-06-13 | Tire tread pattern structure for motor two-wheeled vehicle |
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| CN107160948A CN107160948A (en) | 2017-09-15 |
| CN107160948B true CN107160948B (en) | 2023-01-10 |
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|---|---|---|---|---|
| CN108509673B (en) * | 2018-02-05 | 2021-09-07 | 哈尔滨工业大学 | Image processing technology-based tread pattern block sea-land ratio calculation method |
| JP7126968B2 (en) * | 2019-03-01 | 2022-08-29 | 株式会社ブリヂストン | motorcycle tires |
| TWI690434B (en) * | 2019-04-12 | 2020-04-11 | 正新橡膠工業股份有限公司 | Tire with enhanced drainage ability |
| CN110143104A (en) * | 2019-06-21 | 2019-08-20 | 厦门正新橡胶工业有限公司 | Pneumatic tire for bicycle tread pattern structure |
| CN114905892B (en) * | 2022-01-28 | 2023-10-24 | 正新（漳州）橡胶工业有限公司 | Electric vehicle tire |
| CN115027183B (en) * | 2022-03-15 | 2023-11-03 | 厦门正新橡胶工业有限公司 | Tread pattern structure of tire |
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