CN114801592B - Heavy-duty tire - Google Patents
Heavy-duty tire Download PDFInfo
- Publication number
- CN114801592B CN114801592B CN202210547293.XA CN202210547293A CN114801592B CN 114801592 B CN114801592 B CN 114801592B CN 202210547293 A CN202210547293 A CN 202210547293A CN 114801592 B CN114801592 B CN 114801592B
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- CN
- China
- Prior art keywords
- steel wire
- annular belt
- symmetrical
- tread
- belt layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 78
- 239000010959 steel Substances 0.000 claims abstract description 78
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000010008 shearing Methods 0.000 abstract description 11
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract 1
- 150000001875 compounds Chemical group 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Classifications
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/0007—Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal
-
- 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
-
- 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
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The invention discloses a truck tire, which comprises a rubber structure and a steel wire annular belt arranged in the rubber structure, wherein the steel wire annular belt comprises a first steel wire annular belt layer, a second steel wire annular belt layer and a third steel wire annular belt layer which are sequentially distributed from inside to outside, the third steel wire annular belt layer is of a split structure and comprises first symmetrical structures symmetrically arranged on two sides of a tread center line, and steel wires in the first symmetrical structures on two sides are symmetrical with respect to the tread center line. According to the invention, the third steel wire annular belt layer structure is improved, so that the shearing force born by the first symmetrical structure is reduced, rubber materials close to the center end point and the tire shoulder end point of the first symmetrical structure bear the shearing force, the shearing force is dispersed in the tire shoulder and the center, the separation of the rubber materials and the third steel wire annular belt layer caused by heating is effectively improved, the damage risk of the tire is further reduced, and the high-speed running performance of the tire is improved.
Description
Technical Field
The invention relates to a truck tire, in particular to adjustment of a steel wire annular belt structure.
Background
In the high-speed running of a load-carrying vehicle, sudden tire burst is a dangerous event, and a malignant accident which often causes the death of a vehicle is caused, so that how to improve the safety of the vehicle in the high-speed running is still a technical problem to be solved by the person skilled in the art.
Disclosure of Invention
The invention aims to provide a truck tire which can effectively improve the high-speed performance of transverse groove patterns and ensure the safety of vehicles at high speed.
Another object of the present invention is to provide a truck tire that reduces tire failure due to sudden tire temperature rise during high speed travel of a vehicle under high load.
In order to solve the technical problems, the invention provides a truck tire, which comprises a rubber material structure and steel wire annular belts arranged in the rubber material structure, wherein the steel wire annular belts comprise a first steel wire annular belt layer, a second steel wire annular belt layer and a third steel wire annular belt layer which are sequentially distributed from inside to outside, the third steel wire annular belt layer is of a split structure and comprises first symmetrical structures symmetrically arranged on two sides of a tread center line, and steel wires in the first symmetrical structures on two sides are symmetrical with respect to the tread center line.
According to the high-speed performance test on the prior art truck tires, it can be found that most of the tire failure modes under high speed are caused by the separation of rubber materials at two ends of the steel belts 2 and 3 layers from the steel belts, specifically, in the prior art, the steel belts 2 and 3 layers are tire working layers, the angles of the steel wires are opposite to the center line of the tire tread, the former is inclined leftwards, the latter is inclined rightwards, the rubber materials at the tail ends of the steel belts 2 and 3 layers are subjected to larger shearing force, meanwhile, the tail ends of the steel belts 2 and 3 layers are positioned at the thicker positions of tire shoulders, when the tire rolls, the deformation of the tire shoulders is large, the temperature rise is fast, the rubber materials at the tail ends of the steel belts 2 and 3 layers are separated from the steel wires, and finally the tire tread is exploded.
Based on the above, the truck tire of the invention improves the structure of the third steel wire annular belt layer, the third steel wire annular belt layer adopts a split structure in the transverse direction of the tire, the split structure is hereinafter called as a first symmetrical structure, the extending directions of steel wires in the first symmetrical structures on two sides are symmetrical about the center line of the tire tread, so that the shearing force born by rubber materials at two ends of the first symmetrical structure is greatly reduced compared with the prior art, the rubber materials near the center end point of the first symmetrical structure are close to the end point of the tire shoulder and bear the shearing force, the shearing force is not concentrated at the tire shoulder any more, the rubber materials are prevented from being separated from the steel wire annular belt, the risk of tire damage is reduced, and the high-speed performance of the tire is improved.
Optionally, the steel wire annular belt further comprises a fourth steel wire annular belt layer, the fourth steel wire annular belt layer is of a split structure and comprises second symmetrical structures symmetrically arranged on two sides of the tread center line, the second symmetrical structures are correspondingly distributed on the radial outer sides of the first symmetrical structures, the width of the second symmetrical structures is smaller than that of the first symmetrical structures, and the extending directions of the steel wires in the second symmetrical structures are consistent with those of the corresponding first symmetrical structures.
Optionally, the rubber material structure forms a tread part on the radial outer side of the fourth steel wire annular belt layer, the tread part is of a transverse pattern groove structure, a first main groove and a second main groove which extend along the circumferential direction are further arranged on two sides of the tread central line, the first main groove is close to the tread central line, and the transverse pattern groove extends from the tread center to the tread shoulder part to form a first central pattern block, a second central pattern block and a tire shoulder pattern block;
and a tire shoulder groove is formed in the outer side of the tire shoulder pattern block, and the end part of the second steel wire ring belt layer extends to the radial inner end of the tire shoulder groove.
Optionally, the first main groove comprises a first groove section and a second groove section, both communicating with the same lateral groove, the inner end of the first symmetrical structure being located radially between the first groove section and the second groove section.
Optionally, in the first symmetrical structure and the second symmetrical structure, the inner end is located in the area range of the first central block in the radial direction, the inner end is located in the area range of the second central block in the radial direction, and the outer ends are located in the area range of the shoulder block in the radial direction.
Optionally, an included angle between the extending direction of the steel wire line and the central line of the tread in the first symmetrical structure is α, and a range of values of α is: 18 ° < α <53 °.
Optionally, from a midpoint of the second wire ring belt layer to an end point of the second wire ring belt layer, the second wire ring belt layer is inclined radially inward by an angle θ1, and from a center of the tread portion to an end point of the tread portion, the tread portion is inclined radially inward by an angle θ2, θ1> θ2.
Drawings
FIG. 1 is a schematic view of one embodiment of a wire loop in a truck tire according to the present invention;
FIG. 2 is a radial cross-sectional view of a truck tire provided by the present invention;
FIG. 3 is a tread pattern appearance of a truck tire provided by the present invention;
FIG. 4 is a schematic view of the structure of FIG. 2 to the left of the tread centerline;
FIG. 5 is a schematic view of the structure of FIG. 2 to the right of the tread centerline;
FIG. 6 is a schematic view of the structure of FIG. 3 to the left of the tread centerline;
FIG. 7 is a schematic view of the structure of FIG. 3 to the right of the tread centerline;
Wherein reference numerals in fig. 1-7 are described as follows:
11-tread portion; 11 a-transverse grooves; 11 b-a first main trench; b1-a first trench section; b2-a second trench section; 11 c-a second main trench; 12 a-shoulder grooves; b1-a first center block; b2-a second center block; b3-shoulder blocks;
21-a first steel wire belt layer;
22-a second wire band layer;
23-a third wire band layer; 23 a-a first symmetrical structure;
24-a fourth steel wire ring belt layer; 24 a-a second symmetrical structure;
l-tread centerline.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The terms "first," "second," and the like, herein are merely used for convenience in describing two or more structures or components that are identical or functionally similar, and do not denote any particular limitation of order and/or importance.
Herein, in the radial direction of the tire, the side close to the tread pattern is the "outer side".
Herein, in the width direction of the tire, the direction toward the tire center is "inside", and the direction away from the tire center is "outside".
Referring to fig. 1, the present invention provides a truck tire, which comprises a rubber compound structure, and a steel wire annular belt disposed inside the rubber compound structure, wherein the steel wire annular belt comprises a first steel wire annular belt layer 21, a second steel wire annular belt layer 22 and a third steel wire annular belt layer 23 which are sequentially distributed from inside to outside, the third steel wire annular belt layer 23 is in a split structure, and comprises two first symmetrical structures 23a, the first symmetrical structures 23a are symmetrically distributed on two sides of a tread center line l, and steel wire wires in the two first symmetrical structures 23a are symmetrically distributed about the tread center line l.
According to the high-speed performance test on the prior art truck tires, it can be found that most of the tire failure modes under high speed are caused by the separation of rubber materials at two ends of the steel belts 2 and 3 layers from the steel belts, specifically, in the prior art, the steel belts 2 and 3 layers are tire working layers, the angles of the steel wires are opposite to the center line of the tire tread, the former is inclined leftwards, the latter is inclined rightwards, the rubber materials at the tail ends of the steel belts 2 and 3 layers are subjected to larger shearing force, meanwhile, the tail ends of the steel belts 2 and 3 layers are positioned at the thicker positions of tire shoulders, when the tire rolls, the deformation of the tire shoulders is large, the temperature rise is fast, the rubber materials at the tail ends of the steel belts 2 and 3 layers are separated from the steel wires, and finally the tire tread is exploded.
Based on the above, the truck tire of the invention improves the structure of the third steel wire annular layer 23, the third steel wire annular layer 23 adopts a split structure in the transverse direction of the tire, and steel wires in the first symmetrical structures 23a at two sides are symmetrical about the center line l of the tire tread, so that the shearing force born by rubber materials at two ends of the first symmetrical structures 23a is greatly reduced compared with the prior art, the first symmetrical structures 23a are close to the center end point, rubber materials close to the tire shoulder end point bear the shearing force, the shearing force is not concentrated at the tire shoulder any more, the rubber materials are prevented from being separated from the steel wire annular layer, the risk of tire damage is reduced, and the high-speed performance of the tire is further improved.
Further, the steel wire annular belt further comprises a fourth steel wire annular belt layer 24, the fourth steel wire annular belt layer 24 is also of a split structure and comprises two second symmetrical structures 24a, the two second symmetrical structures 24a are symmetrically arranged on two sides of the tread center line l and correspondingly distributed on the radial outer side of the first symmetrical structure 23a, the width of the second symmetrical structure 24a is smaller than that of the first symmetrical structure 23a, and the extending direction of steel wires in the second symmetrical structure 24a is consistent with that of the corresponding first symmetrical structure 23 a.
In this embodiment, the number of the second symmetrical structures 24a and the first symmetrical structures 23a is two, and the two symmetrical structures are distributed on both sides of the tread center line l. It is understood that the number of the second symmetrical structures 24a and the first symmetrical structures 23a is not limited, and may be more than two, as long as they are symmetrically distributed about the tread center line l.
Referring to fig. 2-3, in the present invention, the rubber compound structure forms a tread portion 11 radially outside the fourth wire ring belt layer 24, the tread portion 11 is of a lateral groove structure, first main grooves 11B and second main grooves 11c extending in the circumferential direction are further provided on both sides of the tread center line l, the first main grooves 11B are close to the tread center line l, the lateral grooves 11a extend from the tread center to the tread shoulder portion to form a first center block B1, a second center block B2, and a shoulder block B3,
A shoulder groove 12a is provided outside the shoulder block B3, and an end portion of the second wire belt layer 22 extends to a radially inner end of the shoulder groove 12 a.
The end of the second steel wire annular belt layer 22 is thinner than the corresponding rubber structure, so that the heat dissipation performance is good, and the high-speed performance of the truck tire is further improved.
As will be understood in conjunction with fig. 3 and 4, the first main groove 11b includes a first groove section b1 and a second groove section b2, which are located on both sides of the same lug groove 11a and communicate with the same lug groove 11a, and the inner end of the first symmetrical structure 23a is located between the first groove section b1 and the second groove section b2 in the radial direction.
The above arrangement is merely illustrative, and in practical applications, the position of the inner end of the first symmetrical structure 23a is not limited, and may be located on the inner side of the first groove section b1 or on the outer side of the second groove section b 2.
As shown in fig. 3,5, in the first symmetrical structure 23a and the second symmetrical structure 24a, the inner end is located in the radial direction within the region of the first center block B1, and the inner end is located in the radial direction within the region of the second center block B2, and both the outer ends are located in the radial direction within the region of the shoulder block B3.
From fig. 3 and fig. 5, in order to prevent cracking at the thinnest part of the rubber material after separating the steel wire from the rubber material and damaging the tread portion 11, the first symmetrical structure 23a and the second symmetrical structure 24a are arranged as described above, avoiding the second main groove 11c, and ensuring that the tread portion 11 has sufficient thickness at the corresponding positions of the ends of the first symmetrical structure 23a and the second symmetrical structure 24 a.
Referring to fig. 3, 6 and 7, in the present invention, the angle between the extending direction of the steel wire in the first symmetrical structure 23a and the tread center line l is α, and the value range of α is: 18 ° < α <53 °.
Further, as will be understood from fig. 5, from the midpoint of the second wire belt layer 22 to the end points of the second wire belt layer 22, the second wire belt layer 22 is inclined radially inward by an angle θ1, and from the midpoint of the tread portion 11 to the end points of the tread portion 11, the tread portion 11 is also inclined radially inward by an angle θ2, θ1> θ2.
Because the tread part 11 is necessarily extruded in the ground direction in the running process, the strain of the end point edge can be effectively reduced, and the separation opportunity of the steel belt and the sizing material is reduced.
The above description of a truck tire provided by the present invention has been provided in detail, and specific examples have been applied herein to illustrate the principles and embodiments of the present invention, and the above examples are only for aiding in the understanding of the method of the present invention and its core concept. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (4)
1. The heavy duty tire comprises a rubber material structure and a steel wire annular belt arranged in the rubber material structure, wherein the steel wire annular belt comprises a first steel wire annular belt layer (21), a second steel wire annular belt layer (22) and a third steel wire annular belt layer (23) which are sequentially distributed from inside to outside,
The third steel wire annular belt layer (23) is of a split structure and comprises first symmetrical structures (23 a) symmetrically arranged on two sides of a tread center line (l), and steel wires in the first symmetrical structures (23 a) on two sides are symmetrical about the tread center line (l);
The steel wire annular belt further comprises a fourth steel wire annular belt layer (24), the fourth steel wire annular belt layer (24) is of a split structure and comprises second symmetrical structures (24 a) symmetrically arranged on two sides of the tread center line (l), the second symmetrical structures (24 a) are correspondingly distributed on the radial outer sides of the first symmetrical structures (23 a), the width of the second symmetrical structures (24 a) is smaller than that of the first symmetrical structures (23 a), and the extending directions of the steel wire lines in the second symmetrical structures (24 a) and the corresponding first symmetrical structures (23 a) are consistent;
The rubber material structure forms a tread part (11) on the radial outer side of the fourth steel wire annular belt layer (24), the tread part (11) is of a transverse pattern groove structure, a first main groove (11B) and a second main groove (11 c) which extend along the circumferential direction are further arranged on two sides of the tread center line (l), the first main groove (11B) is close to the tread center line (l), the transverse pattern groove (11 a) extends from the tread center to the tread shoulder part to form a first central pattern block (B1), a second central pattern block (B2) and a tire shoulder pattern block (B3),
A shoulder groove (12 a) is formed in the outer side of the shoulder pattern block (B3), and the end part of the second steel wire annular belt layer (22) extends to the radial inner end of the shoulder groove (12 a);
The first main groove (11 b) comprises a first groove section (b 1) and a second groove section (b 2), which are communicated with the same transverse groove (11 a), and the inner end of the first symmetrical structure (23 a) is positioned between the first groove section (b 1) and the second groove section (b 2) in the radial direction.
2. A truck tyre according to claim 1, wherein, in said first symmetrical structure (23 a) and said second symmetrical structure (24 a), the inner end is radially located in the area of said first central block (B1) and the inner end is radially located in the area of said second central block (B2), the outer ends of both being radially located in the area of said shoulder block (B3).
3. A truck tyre according to claim 1, wherein the angle α between the direction of extension of the wire line and the tread centre line (l) in the first symmetrical structure (23 a) is in the range: 18 ° < α <53 °.
4. A truck tyre according to any one of claims 1-3, wherein said second wire band layer (22) is inclined radially inwards from a midpoint of said second wire band layer (22) to an end point of said second wire band layer (22), with an inclination angle θ1, from a midpoint of said tread portion (11) to an end point of said tread portion (11), with said tread portion (11) being inclined radially inwards with an inclination angle θ2, θ1> θ2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210547293.XA CN114801592B (en) | 2022-05-19 | 2022-05-19 | Heavy-duty tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210547293.XA CN114801592B (en) | 2022-05-19 | 2022-05-19 | Heavy-duty tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114801592A CN114801592A (en) | 2022-07-29 |
| CN114801592B true CN114801592B (en) | 2024-04-30 |
Family
ID=82514893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210547293.XA Active CN114801592B (en) | 2022-05-19 | 2022-05-19 | Heavy-duty tire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114801592B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0616009A (en) * | 1991-07-01 | 1994-01-25 | Sumitomo Rubber Ind Ltd | Radial tire |
| JPH1053007A (en) * | 1996-08-09 | 1998-02-24 | Sumitomo Rubber Ind Ltd | Radial tire for motorcycle |
| JP2001187514A (en) * | 2000-12-08 | 2001-07-10 | Sumitomo Rubber Ind Ltd | Radial tire for motorcycle |
| JP2006273161A (en) * | 2005-03-29 | 2006-10-12 | Bridgestone Corp | Pneumatic tire |
| JP5486109B1 (en) * | 2013-05-10 | 2014-05-07 | 株式会社ブリヂストン | Tire and manufacturing method thereof |
| JP2015089744A (en) * | 2013-11-06 | 2015-05-11 | 住友ゴム工業株式会社 | Heavy load tire |
| JP2016043896A (en) * | 2014-08-26 | 2016-04-04 | 住友ゴム工業株式会社 | Pneumatic tire for heavy load |
| JP2016043897A (en) * | 2014-08-26 | 2016-04-04 | 住友ゴム工業株式会社 | Pneumatic tire for heavy load |
| CN109866555A (en) * | 2017-12-04 | 2019-06-11 | 正新橡胶工业股份有限公司 | A kind of tire of tyre surface optimization structure |
| CN211995014U (en) * | 2020-03-19 | 2020-11-24 | 晋勇（清远）橡胶工业有限公司 | Steel wire tire |
| CN214984646U (en) * | 2021-05-14 | 2021-12-03 | 青岛双星轮胎工业有限公司 | Tire pattern and trailer tire |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4943830B2 (en) * | 2006-12-20 | 2012-05-30 | 株式会社ブリヂストン | Pneumatic tires for motorcycles |
| US20110114239A1 (en) * | 2009-11-13 | 2011-05-19 | Gayathri Venkataramani | Heavy duty tire |
| EP3381716B1 (en) * | 2013-11-07 | 2019-07-31 | Sumitomo Rubber Industries, Ltd. | Heavy-duty tire |
| JP2021167177A (en) * | 2020-04-13 | 2021-10-21 | 住友ゴム工業株式会社 | tire |
-
2022
- 2022-05-19 CN CN202210547293.XA patent/CN114801592B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0616009A (en) * | 1991-07-01 | 1994-01-25 | Sumitomo Rubber Ind Ltd | Radial tire |
| JPH1053007A (en) * | 1996-08-09 | 1998-02-24 | Sumitomo Rubber Ind Ltd | Radial tire for motorcycle |
| JP2001187514A (en) * | 2000-12-08 | 2001-07-10 | Sumitomo Rubber Ind Ltd | Radial tire for motorcycle |
| JP2006273161A (en) * | 2005-03-29 | 2006-10-12 | Bridgestone Corp | Pneumatic tire |
| JP5486109B1 (en) * | 2013-05-10 | 2014-05-07 | 株式会社ブリヂストン | Tire and manufacturing method thereof |
| JP2015089744A (en) * | 2013-11-06 | 2015-05-11 | 住友ゴム工業株式会社 | Heavy load tire |
| JP2016043896A (en) * | 2014-08-26 | 2016-04-04 | 住友ゴム工業株式会社 | Pneumatic tire for heavy load |
| JP2016043897A (en) * | 2014-08-26 | 2016-04-04 | 住友ゴム工業株式会社 | Pneumatic tire for heavy load |
| CN109866555A (en) * | 2017-12-04 | 2019-06-11 | 正新橡胶工业股份有限公司 | A kind of tire of tyre surface optimization structure |
| CN211995014U (en) * | 2020-03-19 | 2020-11-24 | 晋勇（清远）橡胶工业有限公司 | Steel wire tire |
| CN214984646U (en) * | 2021-05-14 | 2021-12-03 | 青岛双星轮胎工业有限公司 | Tire pattern and trailer tire |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114801592A (en) | 2022-07-29 |
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