CN114714821B - Pneumatic radial tire with improved durability - Google Patents
Pneumatic radial tire with improved durability Download PDFInfo
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- CN114714821B CN114714821B CN202210334461.7A CN202210334461A CN114714821B CN 114714821 B CN114714821 B CN 114714821B CN 202210334461 A CN202210334461 A CN 202210334461A CN 114714821 B CN114714821 B CN 114714821B
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- 238000000034 method Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 238000011161 development Methods 0.000 claims abstract description 4
- 238000005538 encapsulation Methods 0.000 claims description 12
- 239000011324 bead Substances 0.000 claims 2
- 238000010073 coating (rubber) Methods 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000020169 heat generation Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000000465 moulding Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 5
- 238000007493 shaping process Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 210000001161 mammalian embryo Anatomy 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- B60C11/01—Shape of the shoulders between tread and sidewall, e.g. rounded, stepped or cantilevered
-
- 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
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
-
- 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
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C2009/2012—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel with particular configuration of the belt cords in the respective belt layers
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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
Abstract
The invention discloses a pneumatic radial tire with improved durability, which relates to the field of tires, and has simple structure, and by adjusting the tire wings of the tire to be wide wings, the end points of the tire wings move downwards, avoid a sidewall bending area and extend to a lower sidewall area, so that the durability of the tire can be improved, the wide wings can be formed through a TOS (total internal standard) process according to the structural form of the tire after adjustment, the development and production complexity of the sidewalls are reduced, and the forming efficiency is improved; meanwhile, the tread design of the wide-large wing rubber is adopted, so that the tire wings replace part of the tire side functions, the tire side rubber pad technology is simplified in molding, the tire side rubber pad part is compounded to the lower end of the tire belt to form the tire belt rubber coating, the production steps are reduced, and meanwhile, the formed tire belt rubber coating can effectively reduce the heat generation of the tire structure; in addition, in order to match the tire structural form after adjustment, the invention adaptively adjusts the tire pressing treatment steps, and further improves the durability of the tire.
Description
Technical Field
The invention relates to the field of tires, in particular to a pneumatic radial tire with improved durability.
Background
The existing high-performance tire is formed by a crown side (TOS) and a side cap (SOT), wherein the SOT forming mode has complex process and low efficiency; in the TOS forming mode, the UHP tire performance requires wide belt ply, so that the difficult pressing is easily caused, and the durable faults are easily generated at the tire wing end points.
Existing high performance tires: the tire adopting the TOS forming mode has the tire wing end points in the upper deflection area of the tire side, and for the tire with the UHP tire flatness lower than 45%, the tire adopting the TOS forming mode has the belt layer, the tire wing, the cap ply and the like concentrated in a narrow area in the upper tire side area, and is easy to crack and the like to cause failure; the tire adopting the SOT molding mode has low production efficiency.
Disclosure of Invention
The present invention has been made in view of the above-described problems occurring in the prior art, and an object of the present invention is to provide a pneumatic radial tire having improved durability, which is formed into a wide tire wing by limiting the tire wing size.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the pneumatic radial tire with improved durability comprises tire wings and two layers of belt layers, wherein the tire wing end points are positioned on the inner side of a tire SW line in the radial direction of the tire, the distance from a tire crown end point to a tire crown rubber end point along the radial direction of the tire tread is the width A of an upper tire wing, the value range of the width A of the upper tire wing is 8 mm-12 mm, the tire wing end points extend to a lower tire side area, the distance from the tire crown rubber end point to the tire wing end point along the radial direction of the tire tread is the width B of the lower tire wing, the width B= (SH-TTM-SDH+ 2+a)/B, SH is the height of a tire section, TTM is the thickness of a tire crown, SDH is the height of a horizontal axis of a tire section, a is more than or equal to 0 and less than or equal to 1.05 and less than or equal to 1.15.
As a further scheme of the invention: the tire wing surface forms up>A tire wing thinning inflection point D, the distance C=PDW-TDW-A+3 between the tire crown rubber end point and the tire wing thinning inflection point along the tire radial direction, PDW is the axial expansion width of up>A tire pattern, and TDW is the tire grounding width.
As a further scheme of the invention: the thickness of the tire wing at the tire wing end point along the radial direction of the tire is H, and the value range of H is 0.6 mm-1.0 mm.
As a further scheme of the invention: the tire is molded by a TOS process, and the tire pressing section is not less than 4 sections.
As a further scheme of the invention: the tire comprises a first belt layer and a second belt layer, wherein the two ends of the first belt layer along the radial direction of the tire are both provided with belt layer encapsulation.
As a further scheme of the invention: the width of the rubberized edge of the radially outer end of the tire of the belt ply is M= (W) G1B –W G2B ) /2+K, said W G1B For the width of the first belt layer in the axial direction of the tire, the W G2B And the width of the second belt ply along the axial direction of the tire is K which is the width coefficient of the upper film, and the value range of K is more than or equal to 10 and less than or equal to 25mm.
As a further scheme of the invention: the width of the lower rubber edge of one end of the belt ply rubber coating along the radial direction of the tire is as follows: n is more than or equal to 10 and less than or equal to 20mm, and the encapsulation thickness of the belt ply layer meets G is more than or equal to 0.8 and less than or equal to 2.0mm.
Compared with the prior art, the invention has the beneficial effects that: the tire wing adjusting device is novel in structure, the tire wing is adjusted to be a wide tire wing, so that the tire wing end points move downwards, the sidewall bending area is avoided, the tire wing extends to the lower sidewall area, the durability of the tire can be improved, the adjusted tire structure form can be used for forming the wide tire wing through a TOS (total internal standard) process, the sidewall development and production complexity is reduced, and the forming efficiency is improved; meanwhile, the tread design of the wide-large wing rubber is adopted, so that the tire wings replace part of the tire side functions, the tire side rubber pad technology is simplified in molding, the tire side rubber pad part is compounded to the lower end of the tire belt to form the tire belt rubber coating, the production steps are reduced, and meanwhile, the formed tire belt rubber coating can effectively reduce the heat generation of the tire structure; in addition, in order to match the tire structural form after adjustment, the invention adaptively adjusts the tire pressing treatment steps, and further improves the durability of the tire.
Drawings
FIG. 1 is a schematic view of a portion of a tire cross-section;
FIG. 2 is a schematic view of a tire cross-section;
FIG. 3 is a schematic view of a tire area distribution;
FIG. 4 is a schematic view of a tire cross-section of the prior art;
FIG. 5 is a schematic view of a cross-section of a tire of the present application;
FIG. 6 is a schematic view of the deployment of a wide tire wing;
FIG. 7 is a schematic view of a tire width greatly reduced wing deployment configuration;
FIG. 8 is a schematic view of the belt and encapsulation structure in a tire.
In the figure: 10-crown, 11-crown end point, 12-crown cap end point, 13-winged, 14-winged end point, 21-first belt, 22-second belt, 23-belt encapsulation.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
the pneumatic radial tire with improved durability comprises a tire wing 13 and two layers of belt layers, wherein the end points of the tire wing 13 are positioned on the inner side of a tire SW line in the radial direction of the tire, the tire wing is designed to be a wide tire wing, and can avoid a sidewall bending area, extend to a lower sidewall area and improve the durability of the tire.
The distance from the crown end point 11 to the crown rubber end point 12 along the radial direction of the tread is an upper tire wing width A, the range of the upper tire wing width A is 8 mm-12 mm, the tire wing end point 14 extends to a lower tire side area, the distance from the crown rubber end point 12 to the tire wing end point 14 along the radial direction of the tread is a lower tire wing width B, the lower tire wing width satisfies B= (SH-TTM-SDH+ 2+a)/B, SH is the tire section height, TTM is the tire crown thickness, SDH is the tire lower section horizontal axis height, a satisfies 0.ltoreq.a.ltoreq.SDH/2 (a is the position interval of the tire wing section in the lower tire side area), and B satisfies 1.05.ltoreq.b.ltoreq.1.15. Through changing tire wing size design, make the tire can adopt the fashioned mode of TOS, combine the adjustment of tire wing extreme point position, this application can effectively avoid last sidewall region belted layer, child wing, cap ply etc. to concentrate in a narrow region, prevent that the tire from producing the fracture and causing the inefficacy.
To verify the validity and specificity of the above formulas and the value ranges of a and b, tires of two specifications were selected and subjected to durability experiments. (after the specification of the tire is determined, SH, TTM, SDH is a constant value)
The method comprises the following steps:
TABLE 1
From the above experimental data, it can be derived that:
after the tire specification is determined, the SH/TTM/SDH is a fixed value, and the values of a and b are changed, so that the validity and the specificity of the value ranges of a and b can be verified. As can be derived from examples 1-3 and examples 4-6, when a and b are within the above-defined ranges, the tire wing end points are located on the SW line or the lower sidewall region, and compared with the prior art, the present invention effectively improves the endurance performance of the tire; when the tire is beyond the range defined by the a and the b, the tire wing end points enter the rim protection area, so that the durability of the tire is reduced; when the tire wing end points are smaller than the range defined by the a and the b, the tire wing end points are still positioned in the flexing area on the tire, and similar to the existing design, the durability of the tire cannot be effectively improved.
In summary, a and b in the lower wing width formula can produce the effect of improving the endurance performance of the tire only in a limited range, and the validity and accuracy of the limited range are verified again.
The tire wing 13 is provided with up>A tire wing thinning inflection point D on the surface, the distance C=PDW-TDW-A+3 between the tire crown rubber end point 12 and the tire wing thinning inflection point along the radial direction of the tire, PDW is the axial expansion width of the tire pattern, and TDW is the grounding width of the tire. The tire wing surface forms a tire wing thinning endpoint, the tire shoulder part sizing material is thinned, the tire sidewall thickness is thinned, the heat dissipation effect is increased, the weight of the tire can be lightened, and the rolling resistance performance is improved.
In order to ensure that the wide tire wing is not cracked when being extruded and smooth tire wing pressing in the forming process is ensured, the thickness range of the end point of the tire wing is limited, the end point of the tire wing is too thin, the tire tread is easy to crack when being extruded, the end point of the tire wing is too thick, steps are easy to appear on the tire embryo, and defects occur in vulcanization.
According to the tire tread rubber, the wide-large wing rubber tread is adopted, so that the tire wing replaces part of the tire side function, the tire side rubber pad process is attached during molding for simplifying, the tire side rubber pad part is compounded to the lower end of the belt layer to form the belt layer rubber coating, the production steps are reduced, and meanwhileThe formed belt encapsulation can isolate the first belt layer 21 from the second belt layer 22, the first belt layer 21 from the ply, and prevent heat generation, specifically: the tire comprises a first belt layer and a second belt layer, wherein both ends of the first belt layer are provided with belt rubber coating 23, and the belt rubber coating is arranged at the end part of the first belt layer so as to reduce heat generation at the end part of the belt layer, and meanwhile, the belt layer and a carcass ply can be separated, and heat generation is prevented. The belt ply encapsulation isolates the first belt ply from the second belt ply along the upper encapsulation of the radial outer side of the tire, abnormal heat generation caused by mutual contact between the first belt ply and the second belt ply is avoided, and the encapsulation width is required to extend to 10-20 mm below the second belt ply; the lower rubber coating of the belt rubber coating along the radial inner side of the tire isolates the end part of the first belt layer from the ply layer to prevent friction, and the width of the rubber sheet below the first belt layer is 10-20 mm. The belt package size is too wide to cause material waste and tire performance degradation, and the package size is too narrow to prevent heat generation between material and material, for avoiding the above-mentioned circumstances, the application defines the size of package: the width of the rubberizing edge of the belt ply encapsulation is M= (W) G1B –W G2B ) /2+K, said W G1B For the width of the first belt layer in the axial direction of the tire, the W G2B The width of the second belt layer along the axial direction of the tire is K, which is the width coefficient of the upper film and satisfies that K is more than or equal to 10 and less than or equal to 25mm; the width of the lower rubber edge of the belt ply rubber coating meets the following conditions: n is more than or equal to 10 and less than or equal to 20mm, and the encapsulation thickness of the belt ply layer meets G is more than or equal to 0.8 and less than or equal to 2.0mm.
In order to verify the accuracy of the principle and effect of the encapsulation provided at both ends of the first belt layer, the following verification experiment was made:
TABLE 3 Table 3
From the experimental result data in table 3, it can be derived that: the tire is characterized in that the tire side rubber pad is compounded to the lower end of the belt layer to form the belt layer rubber coating, and meanwhile, the rubber coating is limited relative to the first belt layer in size, so that the tire side rubber pad attaching process during molding can be simplified, and the durability of the tire can be effectively improved. From comparison of experimental data of example 1, example 2, example 3 with comparative example 1, comparative example 2, it can be derived that: when K is more than or equal to 10 and less than or equal to 25mm, N is more than or equal to 10 and less than or equal to 20mm, G is more than or equal to 0.8 and less than or equal to 2.0mm, the tire performance is obviously reduced, and meanwhile, compared with the existing tire, the durability of the improved tire in the application is obviously improved.
According to the tire wing widening method, the tire wing is widened to form the normal wide tire wing and the thinned wide tire wing, meanwhile, the thickness of the tire wing end point is limited, the tire wing end point of the finished tire can be located in the area below the SW line and above the rim protecting device, the tire wing end point is enabled to avoid the tire side bending area, and the purpose of improving the durability of the tire is achieved. This application has increased tire child wing, makes low flat rate tire shaping mode can be by complicated SOT adjustment to simpler TOS technology, adopts the fashioned wide tire wing of TOS, compares in prior art's adoption SOT fashioned mode, and this application has effectively promoted the shaping efficiency of wide tire wing, compares ordinary tire wing in prior art simultaneously and adopts TOS fashioned mode, and this application has avoided regional belted layer of last side wall, tire wing and cap ply etc. to concentrate in a constrictive region, has reduced the possibility of tire fracture, has promoted the durability of tire.
For the pressfitting shaping of the wide large tire wing in the cooperation this application, the shaping is suppressed the process and has been adjusted among the prior art, is suppressed the section by four sections adjustment to five sections with the shaping, controls each section simultaneously and suppresses the pressure, improves the low flat rate specification shaping and suppresses the difficult problem, has further promoted the durability of tire.
Above-mentioned tire is through TOS shaping and tire is suppressed and is not less than 4 sections, one section is suppressed the rotational speed scope and is: 5-12 Hz, wherein the pressure range of the first-stage compression roller is as follows: 1.5 to 2.5kgf/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The two-section pressing rotating speed range is as follows: 5-12 Hz, the pressure range of the two-stage press roller is 1.5-2.5 kgf/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The three-section pressing rotating speed range is as follows: 5-12 Hz, the pressure range of the three-section press roller is 1.5-2.5 kgf/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The four-section pressing rotating speed range is as follows: 13-24 Hz, the pressure range of the four-section press roller is 2.5-3.5 kgf/cm 2 The method comprises the steps of carrying out a first treatment on the surface of the The five-section pressing rotating speed range is as follows: 25-36 Hz, the pressure range of the five-stage press roller is 0.5-1.0 kgf/cm 2 . As shown in table 2:
| stage(s) | Spindle speed | Pressure of press roller |
| T0→T1 | Low speed | Medium pressure (1.5-2.5 kgf/cm) 2 ) |
| T1→T2 | Low speed | Medium pressure (1.5-2.5 kgf/cm) 2 ) |
| T2→T3 | Low speed | Medium pressure (1.5-2.5 kgf/cm) 2 ) |
| T3→T4 | Medium speed | High pressure (2.5-3.5 kgf/cm) 2 ) |
| T4→T5 | Gao Su | Low pressure (0.5-1.0 kgf/cm) 2 ) |
TABLE 2
Through the definition to wing size scope, the position of wing extreme point has been changed, simultaneously through the change of position can make this tire adopt TOS shaping technology, compare in prior art adopts SOT shaping technology, can further promote the shaping efficiency of tire, for overcoming the tire that produces among the TOS technology and beat difficulty, shaping 2nd embryo and beat and press and easily cause the wing to beat the pole, this application has increased T5 and has beaten, simultaneously to playing the rotational speed of beating the effect roller and beat the adjustment of pressing pressure, can effectively improve the durability of wing extreme point department.
TABLE 3 Table 3
From the experimental data results in table 3 above, it can be derived that: in the application, the TOS forming process of the wide tire wing is adopted, so that the production efficiency of the low-flatness-ratio tire is effectively improved.
The tire wing adjusting device is novel in structure and stable in operation, the tire wing is adjusted to be a wide tire wing, so that the tire wing end points move downwards, the tire wing bending area is avoided, the tire wing extends to the lower tire side area, the durability of the tire can be improved, the adjusted tire structure form can be used for forming the wide tire wing through a TOS (total internal standard) process, the development and production complexity of the tire side is reduced, and the forming efficiency is improved; meanwhile, the tread design of the wide-large wing rubber is adopted, so that the tire wings replace part of the tire side functions, the tire side rubber pad technology is simplified in molding, the tire side rubber pad part is compounded to the lower end of the tire belt to form the tire belt rubber coating, the production steps are reduced, and meanwhile, the formed tire belt rubber coating can effectively reduce the heat generation of the tire structure; in addition, in order to match the tire structural form after adjustment, the invention adaptively adjusts the tire pressing treatment steps, and further improves the durability of the tire.
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 characteristics 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 disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. The pneumatic radial tire with improved durability comprises tire wings and two layers of belt layers, and is characterized in that the tire wing end points are positioned on the inner side of a tire SW line in the radial direction of the tire, the distance from the tire crown end points to the tire crown rubber end points along the radial direction of the tire tread is the width A of an upper tire wing, the value range of the width A of the upper tire wing is 8 mm-12 mm, the tire wing end points extend to a lower sidewall area, the distance from the tire crown rubber end points to the tire wing end points along the radial direction of the tire tread is the width B of a lower tire wing, the width B= (SH-TTM-SDH+ 2+a)/B, SH is the height of a tire section, TTM is the thickness of a tire crown and SDH is the height of a horizontal axis of the tire section, a is the position interval of the tire wing section in the lower sidewall area, a is more than or equal to 0 and less than or equal to/2, B is more than or equal to 1.05 and less than or equal to 1.15.
2. up>A pneumatic radial tire with improved durability according to claim 1, wherein said wing surface forms up>A wing thinning inflection point D, said crown rubber end point and said wing thinning inflection point being located at up>A distance c=pdw-TDW-a+3 in the tire radial direction, said PDW being the tire tread axial development width, and said TDW being the tire ground contact width.
3. A pneumatic radial tire for improving durability according to claim 1 or 2, wherein the thickness of the wing at the end point of the wing in the tire radial direction is H, and the value of H is in the range of 0.6mm to 1.0mm.
4. A pneumatic radial tire with improved durability according to claim 1 or 2, wherein said tire is formed by TOS process and the tire pressing section is not less than 4 sections.
5. A pneumatic radial tire having improved durability according to claim 1 or 2, wherein said tire comprises a first belt layer and a second belt layer, said first belt layer being formed with a belt cap at both ends in a tire radial direction.
6. A pneumatic radial tire having improved durability as in claim 5, wherein said belt package has a bead width at an outward end in the tire radial direction of m= (W) G1B –W G2B ) /2+K, said W G1B For the width of the first belt layer in the axial direction of the tire, the W G2B And the width of the second belt ply along the axial direction of the tire is K, the width coefficient of the rubberizing edge is K, and the value range of K is more than or equal to 10 and less than or equal to 25mm.
7. The pneumatic radial tire of claim 6 wherein said belt cap has a bead width at an inward end in the tire radial direction that satisfies: n is more than or equal to 10 and less than or equal to 20mm, and the encapsulation thickness of the belt ply layer meets G is more than or equal to 0.8 and less than or equal to 2.0mm.
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| CN202210334461.7A CN114714821B (en) | 2022-03-31 | 2022-03-31 | Pneumatic radial tire with improved durability |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210334461.7A CN114714821B (en) | 2022-03-31 | 2022-03-31 | Pneumatic radial tire with improved durability |
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| CN114714821B true CN114714821B (en) | 2024-02-09 |
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| JPH08318713A (en) * | 1995-05-23 | 1996-12-03 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
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| CN112428751A (en) * | 2020-12-04 | 2021-03-02 | 安徽佳通乘用子午线轮胎有限公司 | Low flat wide base all-steel radial tire |
| CN214396273U (en) * | 2020-12-29 | 2021-10-15 | 安徽佳通乘用子午线轮胎有限公司 | All-steel radial tire with improved shoulder pad rubber |
| CN214396274U (en) * | 2020-12-04 | 2021-10-15 | 安徽佳通乘用子午线轮胎有限公司 | Low flat wide base all-steel radial tire |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1320422B1 (en) * | 2000-06-09 | 2003-11-26 | Bridgestone Firestone Tech | RADIAL TIRE FOR HEAVY TRANSPORT. |
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2022
- 2022-03-31 CN CN202210334461.7A patent/CN114714821B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08318713A (en) * | 1995-05-23 | 1996-12-03 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| CN103978843A (en) * | 2013-02-07 | 2014-08-13 | 住友橡胶工业株式会社 | Heavy load pneumatic tire |
| CN112373246A (en) * | 2020-11-19 | 2021-02-19 | 安徽佳通乘用子午线轮胎有限公司 | Load-carrying radial tire capable of resisting shoulder cracks |
| CN112428751A (en) * | 2020-12-04 | 2021-03-02 | 安徽佳通乘用子午线轮胎有限公司 | Low flat wide base all-steel radial tire |
| CN214396274U (en) * | 2020-12-04 | 2021-10-15 | 安徽佳通乘用子午线轮胎有限公司 | Low flat wide base all-steel radial tire |
| CN214396273U (en) * | 2020-12-29 | 2021-10-15 | 安徽佳通乘用子午线轮胎有限公司 | All-steel radial tire with improved shoulder pad rubber |
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| CN114714821A (en) | 2022-07-08 |
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