CN114312169B - Support adhesive and run-flat tire - Google Patents
Support adhesive and run-flat tire Download PDFInfo
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- CN114312169B CN114312169B CN202210099464.7A CN202210099464A CN114312169B CN 114312169 B CN114312169 B CN 114312169B CN 202210099464 A CN202210099464 A CN 202210099464A CN 114312169 B CN114312169 B CN 114312169B
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- supporting
- end point
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- tire
- glue
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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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Abstract
The application discloses a support adhesive and an explosion-proof tire, and belongs to the field of explosion-proof tires. The supporting glue is arranged between the inner liner layer and the carcass layer; the width of the supporting glue is L=SW+N+k+L2; wherein SW is the nominal cross-sectional width; n is the flattening ratio; k is a Safort factor, and the value range is 0.73-0.75; l2 is the distance that the upper end point of the support gum overlaps the No. 1 belt. The width of the support adhesive and the mouth shape used can be rapidly confirmed according to different specifications by providing the width determining mode, so that the research and development and production efficiency is improved. Meanwhile, the positioning of the upper end point and the lower end point of the supporting rubber is further limited, the anti-explosion tire is applied to the anti-explosion tire, the technical problem of stress concentration under zero-pressure running of the existing anti-explosion tire due to the defect of the supporting rubber structure is solved, and the durability during zero-pressure running is improved.
Description
Technical Field
The application belongs to the field of run-flat tires, and particularly relates to a supporting adhesive and a run-flat tire.
Background
In the running process of an automobile, the tire provides friction force for the automobile through contact with the ground, and the safety of the tire has an important influence on the safety of the automobile. With the improvement of the living standard of people and the continuous enhancement of safety consciousness, the market demand of the safety tire is increasingly expanded.
Currently, self-supporting run-flat tires have become the main stream of the run-flat tire market, and the existing self-supporting tires (run-flat tires) ensure the durability at zero air pressure by adding a strong and hard supporting rubber to the sidewall. However, too narrow a design of the supporting glue results in insufficient supporting property, while too wide a design results in material waste and too high rigidity resulting in poor comfort. Meanwhile, in the prior art, when the supporting glue structure is designed, the width and the positioning are long, and the width of the supporting glue, the positions of the upper end point and the lower end point are difficult to accurately confirm.
Disclosure of Invention
The application provides a support adhesive and an explosion-proof tire, which solve the technical problems that the width of the support adhesive is long in time consumption and difficult to accurately confirm in the existing explosion-proof tire.
The application provides a supporting adhesive, which is arranged between an inner liner layer and a carcass layer;
the width of the supporting glue is L=SW+N+k+L2;
wherein SW is the nominal cross-sectional width;
n is the flattening ratio;
k is a Safort factor, and the value range is 0.73-0.75;
l2 is the distance that the upper end point of the support gum overlaps the No. 1 belt.
Preferably, the upper end point of the supporting glue is arranged below the No. 1 belt ply, the supporting glue is partially overlapped with the No. 1 belt ply, L2 is more than or equal to 12mm and less than or equal to 20mm, and L2-L1 is more than or equal to 8mm;
wherein L1 is the distance between the upper end point of the sidewall and the upper end of the supporting rubber.
Preferably, the vertical distance between the lower end point of the supporting glue and the plane of the steel wire ring is L3, and L3 is more than or equal to 5mm and less than or equal to 10.
Preferably, the hardness of the sizing material of the supporting glue is HS 69-HS 75.
Preferably, the elastic modulus of the supporting glue is 5.1-6.1 Mpa.
The application also provides a run-flat tire comprising the support adhesive according to any one of the schemes.
Preferably, the run-flat tire further comprises a tread, a cap ply, a 1# belt layer, a sidewall, a carcass layer, a reinforcing layer, an outer jacket, a apex, a bead ring and an inner liner.
Compared with the prior art, the application has the beneficial effects that:
the application provides a support adhesive and a run-flat tire, wherein the width of the support adhesive is limited to be L=SW x N x k+L2, and the radial rigidity and the comfort of the support adhesive can be balanced moderately by limiting the width of the support adhesive, so that insufficient support performance caused by too narrow design and poor comfort caused by material waste and too large rigidity caused by too large width are avoided. Meanwhile, the application of the formula can rapidly confirm the width of the supporting glue and the mouth shape according to different specifications, and improves the research and development and production efficiency.
Furthermore, the application defines the embedding position (the positioning of the upper end point and the lower end point of the supporting glue) of the supporting glue, so that the supporting glue can disperse the stress of the position while providing enough supporting force, and the durability of the supporting glue during zero tire pressure driving is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of corresponding positions of L-L3 in a supporting glue structure according to an embodiment of the present application;
FIG. 2 is a schematic view of an embodiment of the present application;
description of the drawings: (1) tread, (2) cap ply, (3)1 # belt ply, (4) sidewall, (5) carcass ply, (6) reinforcing layer, (7) supporting rubber, (8) outer protection, (9) triangular rubber, and the coatingThe steel wire ring is provided with a plurality of steel wire rings,an inner liner layer.
Detailed Description
The present application will be described and illustrated with reference to the accompanying drawings and examples in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments provided by the present application without making any inventive effort, are intended to fall within the scope of the present application.
It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is possible for those of ordinary skill in the art to apply the present application to other similar situations according to these drawings without inventive effort. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by those of ordinary skill in the art that the described embodiments of the application can be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "a," "an," "the," and similar referents in the context of the application are not to be construed as limiting the quantity, but rather as singular or plural. The terms "comprising," "including," "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in connection with the present application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., "a and/or B" may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The terms "first," "second," "third," and the like, as used herein, are merely distinguishing between similar objects and not representing a particular ordering of objects.
The embodiment of the application provides a supporting rubber and an anti-explosion tire, and fig. 1 is a schematic structural view of the supporting rubber (7) in the embodiment of the application. Referring to fig. 1-2, the supporting glue (7) is arranged on the inner liner layerAnd a carcass layer (5);
the width of the supporting glue (7) is L=SW+N+k+L2;
wherein SW is the nominal cross-sectional width;
n is the flattening ratio;
k is a Safort factor, and the value range is 0.73-0.75;
l2 is the distance that the upper end point of the support gum overlaps the No. 1 belt.
In the application, the width of the supporting glue (7) considers the position and the effect of the supporting glue (7), and the selection of the width of the supporting glue (7) comprehensively considers the design section height of the tire, the framework material and the application of the half parts. Tire section height h=sw×n, and width L of the support paste (7) is calculated according to the Safort factor: l=sw×n×k+l2. The radial rigidity and the comfort of the support adhesive (7) can be balanced moderately by limiting the width of the support adhesive (7), so that insufficient support caused by too narrow design and poor comfort caused by too large width and material waste caused by too large rigidity are avoided. Meanwhile, the application of the formula can rapidly confirm the width of the supporting glue (7) and the mouth shape according to different specifications, and improves the research and development and production efficiency. When k is smaller than 0.73, the design of the supporting glue (7) is narrower, the supporting glue can not support load under the state of zero air pressure or low air pressure, and good zero air pressure supporting performance can not be achieved, when k is larger than 0.75, the design of the supporting glue (7) is too wide, the weight of the tire is increased, the fuel-saving effect is poor, the material can not be efficiently utilized, and the law of fuel efficiency is not met. The phenomenon of controlling k to be more than 0.73-0.75 can be obviously improved.
In the application, further, the upper end point of the supporting glue (7) is arranged below the No. 1 belt ply (3), the supporting glue (7) is partially overlapped with the No. 1 belt ply (3), L2 is more than or equal to 12mm and less than or equal to 20mm, and L2-L1 is more than or equal to 8mm; wherein L1 is the distance between the upper end point of the sidewall and the upper end of the supporting rubber (7). The application can prevent the problems of concentrated shoulder stress and excessive shoulder rigidity by limiting the position of the upper end point of the supporting glue (7).
When L2 is smaller than 12mm, the supporting glue (7) is too small to be padded, so that on one hand, the supporting glue is easy to coincide with the padding points of the side walls (4), the endpoints of the parts of the shoulder parts are too concentrated, the heat at the shoulder parts is concentrated, and on the other hand, delamination can occur at the positions due to the fact that the supporting glue (7) is too small to be padded; when L2 is more than 20mm, the cushion rubber (7) is too large, on one hand, the cushion rubber (7) is too large in cushion, and the cushion rubber material at the tire shoulder part increases the cushion part of the cushion rubber (7), so that the deformation is too thick and rapid heat generation occurs; on the other hand, the rigidity of the tire shoulder part is increased due to the fact that the supporting rubber (7) is too large in padding, so that the average grounding length of the tire crown part is smaller than that of the shoulder part, the grounding trace is biased to a butterfly shape, the trace has good steering performance in cornering, but the straight running performance is poor, meanwhile, abnormal abrasion of the tire shoulder part is caused, and the service life of the tire is reduced.
In the application, the vertical distance between the lower end point of the supporting glue (7) and the upper plane of the bead ring is L3, and L3 is more than or equal to 5mm and less than or equal to 10. The application can ensure that the supporting glue (7) can disperse the stress at the position while providing enough supporting force by limiting the position of the lower end point of the supporting glue (7), can solve the problem that the stress concentration causes the heat generation at the position of the lower sidewall (4) in the normal running process of the full explosion-proof passenger car tire, and can improve the durability during the zero tire pressure running.
Further, the hardness of the rubber material of the supporting rubber (7) is HS 69-HS 75, and the elastic modulus of the rubber material is 5.1-6.1 MPa. The supporting rubber of the full explosion-proof tire mainly provides enough supporting performance for the running of the tire under the pressure of 0 air, so the rubber material needs to have very high elastic modulus, hardness and strength performance, if the hardness and the elastic modulus are too high, the rigidity of the tire side is too high, the comfort of the tire is poor, and if the hardness and the elastic modulus are too low, the supporting rubber (7) has no supporting performance. In the embodiment, the hardness of the rubber material of the supporting rubber (7) is limited to be HS 69-HS 75, the elastic modulus of the rubber material is 5.1-6.1 Mpa, and the 0 air pressure continuous running function and the comfort of the full-passenger car system can be balanced moderately.
The application also provides a run-flat tire comprising the support rubber (7) according to any one of the schemes.
In the application, the run-flat tire further comprises a tread (1), a cap ply (2), a 1# belt layer (3), a sidewall (4), a carcass layer (5), a reinforcing layer (6), an outer cover (8), a apex (9), a bead ring and an inner liner layer
Performance testing
1. Support glue width and positioning test
Taking 225/55R17 as an example, the hardness of the supporting glue is HS70, the elastic modulus is 5.8Mpa, the specific scheme is shown in table 1, and the performance test result is shown in table 2.
Table 1 width and positioning test protocol
Table 2 supporting glue performance test data
As can be seen from table 2, the scheme 1 and the scheme 2 are fixed support rubber, the scheme 1 adopts k=0.71 (too narrow support rubber) for performance test, the scheme 2 adopts k=0.78 (too wide support rubber) for performance test, the high-speed performance of the too narrow support rubber is slightly better, but the 0 air pressure durability and the real vehicle 0 air pressure running performance can not meet the performance requirement; although the supporting performance of the support adhesive with too wide is slightly better due to the fact that the support adhesive is wide, the running performance of the 0-air-pressure real vehicle is slightly better, the support adhesive with too wide can cause material waste, meanwhile, the lower end point of the support adhesive is too close to the plane distance of the steel wire ring, the damage patterns are mostly the sub-opening damage, and the indoor machine tool test cannot meet the requirements due to high heat generation.
In the scheme 3 and the scheme 4, the performance test is performed by adopting the too small padding amount and the too large padding amount for the optimal supporting rubber width, so that even if the proper supporting rubber width is selected, if the padding amount is too small or too large, the indoor conventional durability and the 0 air pressure durability are not ideal, and the 0 air pressure running performance cannot achieve the best effect.
The scheme 5 is the optimal supporting glue width, and by adopting proper padding amount, according to the tire performance test, the indoor performance can reach the regulation requirement, the running distance of the 0-air-pressure real vehicle can reach 80km, and the user requirement can be met.
2. Supporting gum hardness and elastic modulus Performance test
Taking 225/55R17 as an example, the width of the supporting glue is 110mm, the upper end point is positioned below the belt layer, L1 is 6mm, L2 is 18mm, and the vertical distance between the lower end point and the plane of the bead ring is 8mm. The specific protocols and test results are shown in table 3.
Table 3 hardness and elastic modulus performance schemes and test data
As can be seen from Table 3, in scheme 1, the supporting rubber has lower hardness and elastic modulus, and although the comfort is better, the durability in the 0 air pressure chamber and the running distance of the 0 air pressure real vehicle are far from the requirements.
Scheme 2, supporting gum hardness, elastic modulus are too high, although durable in 0 atmospheric pressure room and 0 atmospheric pressure real car travel distance can satisfy the requirement, radial rigidity is big, and the travelling comfort is poor, does not have different with traditional explosion-proof child to do not reach the effect of improving the travelling comfort.
Scheme 3, selecting the hardness and the elastic modulus of the supporting glue in a proper range, and obtaining the following test results: when the supporting rubber with hardness and elastic modulus in a specified range is selected, compared with the scheme 1, the tire comfort is slightly poorer, but the durability in the 0 air pressure chamber and the running distance of a 0 air pressure real vehicle meet the requirements, and the result of the scheme 1 is far exceeded; the tire comfort is better than in scheme 2.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (7)
1. A support gel, characterized in that: the support glue is arranged between the inner liner layer and the carcass layer,
the width of the supporting glue is L=SW+N+k+L2;
wherein SW is the nominal cross-sectional width;
n is the flattening ratio;
k is a Safort factor, and the value range is 0.73-0.75;
l2 is the distance that the upper end point of the support gum overlaps the No. 1 belt.
2. The supporting gum according to claim 1, wherein the upper end point of the supporting gum is arranged below the No. 1 belt layer, the supporting gum is partially overlapped with the No. 1 belt layer, L2 is more than or equal to 12mm and less than or equal to 20mm, and L2-L1 is more than or equal to 8mm;
wherein L1 is the distance between the upper end point of the sidewall and the upper end point of the supporting rubber.
3. The supporting glue according to claim 1, wherein the vertical distance between the lower end point of the supporting glue and the plane of the bead ring is L3, and L3 is 5 mm-10.
4. The backup gum of claim 1, wherein the backup gum has a gum hardness of HS 69-HS 75.
5. The supporting gum according to claim 1, wherein the elastic modulus of the supporting gum is 5.1-6.1 Mpa.
6. An explosion-proof tire, characterized in that: a support gel comprising the support gel of any one of claims 1 to 5.
7. The run-flat tire of claim 6, further comprising a tread, cap ply, # 1 belt, sidewall, carcass layer, reinforcing layer, outer jacket, apex, bead filler, and innerliner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210099464.7A CN114312169B (en) | 2022-01-27 | 2022-01-27 | Support adhesive and run-flat tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210099464.7A CN114312169B (en) | 2022-01-27 | 2022-01-27 | Support adhesive and run-flat tire |
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| Publication Number | Publication Date |
|---|---|
| CN114312169A CN114312169A (en) | 2022-04-12 |
| CN114312169B true CN114312169B (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210099464.7A Active CN114312169B (en) | 2022-01-27 | 2022-01-27 | Support adhesive and run-flat tire |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004299670A (en) * | 2003-03-14 | 2004-10-28 | Bridgestone Corp | Run-flat tire |
| JP2007296871A (en) * | 2006-04-27 | 2007-11-15 | Sumitomo Rubber Ind Ltd | Run flat tire and its manufacturing method |
| JP2012096656A (en) * | 2010-11-02 | 2012-05-24 | Yokohama Rubber Co Ltd:The | Pneumatic run flat tire |
| CN106739842A (en) * | 2017-01-11 | 2017-05-31 | 赛轮金宇集团股份有限公司 | Run-flat tire |
| CN109501530A (en) * | 2018-10-15 | 2019-03-22 | 安徽佳通乘用子午线轮胎有限公司 | A kind of run-flat tire improving endurance quality |
| CN110303827A (en) * | 2019-07-22 | 2019-10-08 | 东营市方兴橡胶有限责任公司 | A kind of all steel run-flat radial and its manufacturing method |
| KR20190118822A (en) * | 2018-04-11 | 2019-10-21 | 넥센타이어 주식회사 | Run-flat tire and method of designing run-flat tire |
-
2022
- 2022-01-27 CN CN202210099464.7A patent/CN114312169B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004299670A (en) * | 2003-03-14 | 2004-10-28 | Bridgestone Corp | Run-flat tire |
| JP2007296871A (en) * | 2006-04-27 | 2007-11-15 | Sumitomo Rubber Ind Ltd | Run flat tire and its manufacturing method |
| JP2012096656A (en) * | 2010-11-02 | 2012-05-24 | Yokohama Rubber Co Ltd:The | Pneumatic run flat tire |
| CN106739842A (en) * | 2017-01-11 | 2017-05-31 | 赛轮金宇集团股份有限公司 | Run-flat tire |
| KR20190118822A (en) * | 2018-04-11 | 2019-10-21 | 넥센타이어 주식회사 | Run-flat tire and method of designing run-flat tire |
| CN109501530A (en) * | 2018-10-15 | 2019-03-22 | 安徽佳通乘用子午线轮胎有限公司 | A kind of run-flat tire improving endurance quality |
| CN110303827A (en) * | 2019-07-22 | 2019-10-08 | 东营市方兴橡胶有限责任公司 | A kind of all steel run-flat radial and its manufacturing method |
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| CN114312169A (en) | 2022-04-12 |
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