CN112428751A - Low flat wide base all-steel radial tire - Google Patents

Low flat wide base all-steel radial tire Download PDF

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Publication number
CN112428751A
CN112428751A CN202011402085.8A CN202011402085A CN112428751A CN 112428751 A CN112428751 A CN 112428751A CN 202011402085 A CN202011402085 A CN 202011402085A CN 112428751 A CN112428751 A CN 112428751A
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China
Prior art keywords
tire
tread
belt
layer
section
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CN202011402085.8A
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Chinese (zh)
Inventor
谷裕
张金船
何金华
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Anhui Giti Radial Tire Co Ltd
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Anhui Giti Radial Tire Co Ltd
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Priority to CN202011402085.8A priority Critical patent/CN112428751A/en
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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
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • 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
    • 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
    • B60C2009/2016—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 comprising cords at an angle of 10 to 30 degrees to the circumferential direction
    • 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
    • B60C2009/2019—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 comprising cords at an angle of 30 to 60 degrees to the circumferential direction

Abstract

The invention discloses a low flat wide-base all-steel radial tire, which relates to the field of radial tires and comprises a tire tread and four belt layers, wherein the four belt layers comprise a first belt layer, a second belt layer, a third belt layer and a fourth belt layer, the tire axial section outer contour of the tire tread is formed by sequentially and smoothly connecting n sections of tread arcs, n is more than or equal to 6, the n sections of tread arcs are respectively and symmetrically distributed along the center point of the tread, and the axial horizontal widths of the n sections of tread arcs are respectively L1、L2、L3…LnThe tire tread has the tread width of L, the structure is simple, the modulus of the belt compound is increased and the thickness ratio of the tread to the shoulder is controlled by simultaneously optimizing the tread profile and the belt structure, the end shear strain of the belt compound of the tire can be reduced, the grounding shape of the tire is ensured to be uniform, the durability of the tire is improved, and the failure rate of the tire is reduced.

Description

Low flat wide base all-steel radial tire
Technical Field
The invention relates to the field of radial tires, in particular to a low-flat wide-base all-steel radial tire.
Background
With the issuance of the Chinese market regulation GB1589-2016 and the implementation of the new policy of 921 treatment, the total weight of the vehicle needs to be reduced and the bearing capacity of the vehicle needs to be improved in the domestic whole vehicle factory, so that the market competitiveness of the vehicle is improved. Meanwhile, the development of Chinese electronic commerce is rapid, and the development of express logistics industry is greatly driven. And the timeliness of express delivery is the first index of competitiveness. The low flat wide base tire replaces double tires with single tires for use, effectively reduces the weight of the whole vehicle, reduces the height of a chassis of a trailer, and increases the volume of a container, thereby improving the bearing capacity of the vehicle.
However, the single tire replaces the double tires for use, which also means that the single tire has higher load, larger tire deformation and higher heat generation, and once a single tire fails, the single tire can greatly affect the timeliness of the vehicle, so that the low flat wide base tire has higher requirement on the durability, and the low flat wide base tire in the prior art cannot meet the actual use requirement.
Disclosure of Invention
The present invention has an object to provide a low flat wide base all-steel radial tire which solves the problems presented in the above-mentioned background art by improving the tread size and the belt size of the radial tire.
In order to achieve the purpose, the invention provides the following technical scheme:
a low flat wide base all steel radial tire comprising a tire tread and four belt layers comprising a first belt layer, a second belt layer, a third belt layer and a fourth belt layer,
the thickness range of the first belted layer is 1.6-2.0 mm, and the width of the first belted layer meets the following requirements: (80-95%) wide cross section, and the angle range of the cross section and the circumferential direction is 45-60 degrees;
the second band layer is formed by winding a single or a plurality of steel wires side by side, the thickness range of the second band layer is 1.6-2.0 mm, and the width of the second band layer satisfies the following requirements: (75% -90%) wide in cross section, and the angle between the cross section and the circumferential direction is 0 degree;
the thickness range of the third belted layer is 1.8-2.2 mm, and the width of the third belted layer meets the following requirements: (70% -85%) wide in cross section, the included angle between the cross section and the circumferential direction is 10-24 degrees, and the extension direction of the third belt layer is opposite to that of the first belt layer;
the thickness range of the fourth belted layer is 1.8-2.2 mm, and the width of the fourth belted layer meets the following requirements: (40% -60%) wide in cross section, and the included angle between the wide cross section and the circumferential direction is 10-24 degrees, and the extending direction of the fourth belt layer is opposite to that of the first belt layer.
As a further scheme of the invention: the tire axial section outer contour of the tire tread is formed by sequentially and smoothly connecting n sections of tread arcs, wherein n is more than or equal to 6, the n sections of tread arcs are respectively and symmetrically distributed along the center point of the tread, and the axial horizontal widths of the n sections of tread arcs are respectively L1、L2、L3…LnThe tread width of the tire tread is L, and the maximum height difference between the n sections of tread arcs and the central point of the tire tread is h1、h2、h3…hnThe radius of the n sections of tread arcs respectively satisfy R1＝Rn＝K1*(L/2)2/8h1、R2＝Rn-1＝K2*(L/2-L1)2/8h2、R3＝Rn-2＝K3*(L/2-L1-L2)2/8h3、…、R2/n＝R(2/n)+1＝K2/n*(2/L-L1-L2-…-L(2/n)-1)2/8h2/nSaid K is1、K2、K3、…、K2/nThe values of (A) are all within 0.8-4.2.
As a further scheme of the invention: the n is 6, and the radius of the 6 sections of tread arcs respectively satisfies R1＝R6＝K1*(L/2)2/8h1、R2＝R5＝K2*((L/2-L1))2/8h2、R3＝R4＝K3*(L/2-L1-L2)2/8h3Said K is1Has a value range of 0.8 to 0.9, K2The value range of (A) is 2.0-3.0, K3The value range of (A) is 3.5-4.0.
As a further scheme of the invention: the n is 8, and the radius of the 8 sections of tread arcs respectively satisfies R1＝R8＝K1*(L/2)2/8h1、R2＝R7＝K2*(L/2-L1)2/8h2、R3＝R6＝K3*(L/2-L1-L2)2/8h3、R4＝R5＝K4*(L/2-L1-L2-L3)2/8h4Said K is1Has a value range of 1.0 to 1.4, K2Has a value range of 1.0 to 1.4, K3Has a value range of 1.3 to 2.0, K4The value range of (A) is 3.8-4.2.
As a further scheme of the invention: the value range of n is as follows: n is more than or equal to 6 and less than or equal to 8.
As a further scheme of the invention: the surface of the four-layer belt layer is attached with a sizing material, and the tensile modulus of the sizing material is 6.0-7.0 MPa.
As a further scheme of the invention: the tire further comprises a shoulder portion, wherein the thickness ratio of the shoulder portion to the tire tread ranges from: 1.0 to 1.3.
Compared with the prior art, the invention has the beneficial effects that: the tire tread structure is novel in structure, the tread profile and the belted layer structure are optimized, the modulus of the belted layer rubber material is increased, the thickness ratio of the tread to the shoulder is controlled, the end point shear strain of the tire belted layer can be reduced, the uniformity of the ground shape of the tire is ensured, the tire tread stress is reduced, the tire durability is improved, and therefore the tire failure rate is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a tread profile of an all-steel radial tire;
FIG. 2 is a partial structural view of a belt of an all-steel radial tire;
in the figure: 1-a first belt layer, 2-a second belt layer, 3-a third belt layer, 4-a fourth belt layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
in the embodiment of the invention, the low flat wide-base all-steel radial tire comprises a tire tread and four belt layers, wherein the four belt layers comprise a first belt layer 1, a second belt layer 2, a third belt layer 3 and a fourth belt layer 4, the thickness range of the first belt layer is 1.6-2.0 mm, and the width of the first belt layer meets the following requirements: (80-95%) wide cross section, and the angle range of the cross section and the circumferential direction is 45-60 degrees; the second band layer is formed by winding a single or a plurality of steel wires side by side, the thickness range of the second band layer is 1.6-2.0 mm, and the width of the second band layer satisfies the following requirements: (75% -90%) wide in cross section, and the angle between the cross section and the circumferential direction is 0 degree; the thickness range of the third belted layer is 1.8-2.2 mm, and the width of the third belted layer meets the following requirements: (70% -85%) wide in cross section, the included angle between the cross section and the circumferential direction is 10-24 degrees, and the extension direction of the third belt layer is opposite to that of the first belt layer; the thickness range of the fourth belted layer is 1.8-2.2 mm, and the width of the fourth belted layer meets the following requirements: (40% -60%) wide in cross section, and the included angle between the wide cross section and the circumferential direction is 10-24 degrees, and the extending direction of the fourth belt layer is opposite to that of the first belt layer.
The tire axial section outer contour of the tire tread is formed by sequentially and smoothly connecting 6 sections of tread arcs, the 6 sections of tread arcs are sequentially and smoothly connected, and the radiuses of the 6 sections of tread arcs respectively meet the requirement of R1＝R6＝K1*(L/2)2/8h1、R2＝R5＝K2*((L/2-L1))2/8h2、R3＝R4＝K3*(L/2-L1-L2)2/8h3Said K is1Has a value range of 0.8 to 0.9, K2The value range of (A) is 2.0-3.0, K3The value range of (A) is 3.5-4.0; the axial horizontal widths of the 6 sections of tread arcs respectively satisfy L1＝L6、L2＝L5Wide cross section (10-20%), L3＝L4The maximum section width of the 6 segments of tread arcs and the tire tread central point is 15-20 percentThe height difference respectively satisfies h1＝h6Outer diameter h (1% to 2%)2＝h5＝(20％～50％)*h1、h3＝h4＝(5％～15％)*h1。
The tensile modulus of the rubber material attached to the belted layer is 6.0-7.0 MPa, the higher modulus of the rubber material can inhibit the shear strain and the strain energy density of the end point of the belted layer, and the durability of the tire is improved. When the modulus is lower than 6.0MPa, the end shear strain and the strain energy density of the belted layer can be increased; when the modulus is higher than 7.0MPa, the strength and fatigue properties of the rubber compound are reduced, resulting in reduced tire performance.
The belt ply structure can reduce the end point shear strain of the belt ply, ensure the even grounding shape of the tire, improve the durability of the tire and ensure the abrasion performance of the tire; through the design of the crown arc, the ground contact shape of the tire can be optimized, and the stress of the tire surface is reduced.
To verify that the four belts and the 6-arc tire tread in the present embodiment can achieve the practical effects described after the tire is improved, the present embodiment makes the following experiments:
examples 1-3, are the experimental sections of the combination of a belt with a tire tread.
Figure BDA0002817299580000041
Figure BDA0002817299580000051
According to the experimental results, the following results can be obtained:
1. comparison of the experimental data from the prior art with comparative example 1 can give: on the premise that the size of the four-layer belt ply is the same as that of the prior art, only the corresponding size of the tire tread is improved, the grounding shape of the tire is optimized, and the two groups of experimental results also verify that the maximum shearing strain and the tread stress of the belt ply of the tire with the improved tire tread are obviously smaller than those of the tire with the non-improved tire tread in the actual use process.
2. Comparison of the experimental data according to the prior art with comparative example 2 can give: on the premise of adopting the tire tread size of the tire in the prior art, four belted layers of the tire are improved, compared with the belted layers in the prior art, the rubber modulus of the belted layers is increased, the higher rubber modulus can inhibit the shear strain and the strain energy density of the end points of the belted layers, and the durability of the tire is improved.
3. Comparison of the experimental data from example 2 with comparative example 1 can give: the tire treads in example 2 and comparative example 1 are both tire treads with crown size improvement, and the two sets of experiments differ only in that: the four belt layers in the embodiment 2 are the four belt layers improved by the inventor, wherein the rubber modulus of the belt layer is 6.5MPa, the four belt layers in the comparative example 1 are the belt layers adopted in the prior art, wherein the rubber modulus of the belt layer is less than 6MPa, and the results can be obtained through two sets of experimental data: the shear strain of the tire belt layer for increasing the rubber modulus of the belt layer is obviously smaller than that of the tire with smaller rubber modulus.
4. Comparison of the experimental data according to examples 1 to 3 and comparative example 2 can give: under the condition that the sizes of the four layers of belt layers are kept the same, the size improvement of the tire tread is added, and the maximum shearing strain of the belt layers and the tire tread stress can be further reduced.
5. Comparison of the experimental data between examples 1-3 and prior art, comparative examples 1-2 can give: the invention can verify the conclusion derived from the theory through experimental data, namely: the tire can reduce the end point shear strain of the belt layer and improve the durability by improving the belt layer independently, can optimize the ground contact shape of the tire and reduce the tire surface stress by improving the crown arc of the tire tread independently, and can further reduce the maximum shear strain of the belt layer and the tire surface stress compared with a tire only changing the tire surface or only changing the belt layer when the experimental tire simultaneously improves the tire tread and the tire belt layer.
For verification: the method limits the particularity that the tensile modulus of rubber materials attached to the belt ply is 6.0-7.0 MPa, and limits the particularity that the thickness ratio of the tire shoulder to the tire tread is 1.0-1.3, and the method makes the following verification experiments:
Prior Art Comparative example 3 Example 1 Example 2 Example 3
Modulus of glue 5.0 8.0 6.0 6.5 7.0
Thickness ratio of tire shoulder to tire tread 1.37 1.4 1.0 1.15 1.3
Stress of tread 1.902 1.936 1.855 1.873 1.862
Maximum shear strain of belt 63.1 53.3 52.7 51.2 49.7
According to the experimental results, the following results can be verified:
compared with the tire in the prior art, the tire with the belt ply attached with the rubber compound tensile film amount of 6.0-7.0 MPa and the thickness ratio range of the shoulder part and the tire of 1.0-1.3, which is defined in the invention, effectively reduces the tire tread stress and the maximum shear strain of the belt ply, and when the adhesive film tensile modulus attached to the belt ply and the thickness ratio of the shoulder part and the tire exceed the above ranges, the tire tread stress and the maximum shear strain of the belt ply are increased by a certain value, and through comparison of the experimental data, the ranges of the defined belt ply attached with the rubber compound tensile modulus and the thickness ratio ranges of the shoulder part and the tire tread can be verified to have certain particularity, and the tensile modulus of the belt ply attached with the rubber compound can be proved to be 6.0-7.0 MPa, the shear strain energy density of the belt ply end point can be inhibited by the higher rubber compound modulus, the durability of the tire is improved. When the modulus is lower than 6.0MPa, the end point shear strain and the strain energy density of the belted layer can be increased; when the modulus is higher than 7.0MPa, the strength and fatigue properties of the compound are lowered, resulting in a decrease in tire performance.
Example 2:
in the embodiment of the invention, the low flat wide-base all-steel radial tire comprises a tire tread and four belt layers, wherein the four belt layers comprise a first belt layer 1, a second belt layer 2, a third belt layer 3 and a fourth belt layer 4, the thickness range of the first belt layer is 1.6-2.0 mm, and the width of the first belt layer meets the following requirements: (80-95%) wide cross section, and the angle range of the cross section and the circumferential direction is 45-60 degrees; the second band layer is formed by winding a single or a plurality of steel wires side by side, the thickness range of the second band layer is 1.6-2.0 mm, and the width of the second band layer satisfies the following requirements: (75% -90%) wide in cross section, and the angle between the cross section and the circumferential direction is 0 degree; the thickness range of the third belted layer is 1.8-2.2 mm, and the width of the third belted layer meets the following requirements: (70% -85%) wide in cross section, the included angle between the cross section and the circumferential direction is 10-24 degrees, and the extension direction of the third belt layer is opposite to that of the first belt layer; the thickness range of the fourth belted layer is 1.8-2.2 mm, and the width of the fourth belted layer meets the following requirements: (40% -60%) wide in cross section, and the included angle between the wide cross section and the circumferential direction is 10-24 degrees, and the extending direction of the fourth belt layer is opposite to that of the first belt layer.
The tire axial section outer contour of the tire tread is formed by sequentially and smoothly connecting 8 sections of tread arcs, the 8 sections of tread arcs are sequentially and smoothly connected, n is 8, and the radiuses of the 8 sections of tread arcs respectively satisfy R1＝R8＝K1*(L/2)2/8h1、R2＝R7＝K2*(L/2-L1)2/8h2、R3＝R6＝K3*(L/2-L1-L2)2/8h3、R4＝R5＝K4*(L/2-L1-L2-L3)2/8h4Said K is1Has a value range of 1.0 to 1.4, K2Has a value range of 1.0 to 1.4, K3Has a value range of 1.3 to 2.0, K4The value range of (a) is 3.8-4.2; the axial horizontal width of the 8 sections of tread arcs respectively meets L1＝L8、L2＝L7Wide cross section (8-12%) and L3＝L6Wide cross section (6-11%), L4＝L5The maximum height difference between the 8 segments of tread arcs and the central point of the tire tread respectively satisfies h1＝h8Outer diameter h (1% to 2%)2＝h7＝(30％～45％)*h1、h3＝h6＝(5％～15％)*h1、h4＝h5＝(1％～5％)*h1。
To verify that the practical effects described after the tire is improved can be achieved by combining the four belt layers with the tire tread with the arc of 8 segments in the embodiment, the following experiments are made in the embodiment:
the related experimental data analysis of the combination of the segment arc 8 of the tire and the belt layer can be referred to the related experimental data analysis of the combination of the segment arc 6 and the belt layer.
Figure BDA0002817299580000071
Figure BDA0002817299580000081
Figure BDA0002817299580000091
According to the experimental results, the following results can be obtained:
1. comparison of the experimental data from the prior art with comparative example 1 can give: on the premise of keeping the size of the four-layer belt ply layer to be the same as that of the prior art, only the corresponding size of the tire tread is improved, the grounding shape of the tire is optimized, and the maximum shearing strain and the tread stress of the belt ply layer can be effectively reduced.
2. Comparison of the experimental data according to the prior art with comparative example 2 can give: on the premise of adopting the tire tread size of the tire in the prior art, the four-layer belt ply of the tire is improved, compared with the belt ply in the prior art, the rubber modulus of the belt ply is increased, and the maximum shear strain and the tire tread stress of the belt ply are effectively reduced.
3. Comparison of the experimental data from example 2 with comparative example 1 can give: the tire treads in example 2 and comparative example 1 are both tire treads with crown size improvement, and the two sets of experiments differ only in that: the four belt layers in example 2 are all the improved four belt layers of the present invention, wherein the rubber modulus of the belt layer is 6.5MPa, and the four belt layers in comparative example 1 are the belt layers adopted in the prior art, wherein the rubber modulus of the belt layer is less than 6MPa, and it can be seen from the results of two sets of experimental data that: the tire belt shear strain in example 2, which increases the belt rubber modulus, is significantly less than the tire with the smaller rubber modulus in comparative example 1, and further can be verified to be: the invention can inhibit the shear strain and the strain energy density of the end point of the belt ply by increasing the modulus of the belt ply rubber.
4. Comparison of the experimental data according to examples 1 to 3 and comparative example 2 can give: under the condition that the sizes of the four layers of belt layers are kept the same, the size improvement of the tire tread is added, and the maximum shearing strain and the tread stress of the belt layers can be further reduced.
5. Comparison of the experimental data between examples 1-3 and prior art, comparative examples 1-2 can give: the invention can verify the conclusion derived from the theory through experimental data, namely: the tire can reduce the end point shear strain of the belt layer and improve the durability by improving the belt layer independently, can optimize the ground contact shape of the tire and reduce the tire surface stress by improving the crown arc of the tire tread independently, and can further reduce the maximum shear strain of the belt layer and the tire surface stress compared with a tire only changing the tire surface or only changing the belt layer when the experimental tire simultaneously improves the tire tread and the tire belt layer.
For verification: the method limits the particularity that the tensile modulus of rubber materials attached to the belt ply is 6.0-7.0 MPa, and limits the particularity that the thickness ratio of the tire shoulder to the tire tread is 1.0-1.3, and the method makes the following verification experiments:
Figure BDA0002817299580000101
according to the experimental results, the following results can be verified:
compared with the tire in the prior art, the tire with the belt ply attached with the rubber compound tensile film amount of 6.0-7.0 MPa and the thickness ratio range of the shoulder part and the tire of 1.0-1.3, which is defined in the invention, effectively reduces the tire tread stress and the maximum shear strain of the belt ply, and when the adhesive film tensile modulus attached to the belt ply and the thickness ratio of the shoulder part and the tire exceed the above ranges, the tire tread stress and the maximum shear strain of the belt ply are increased by a certain value, and through comparison of the experimental data, the ranges of the defined belt ply attached with the rubber compound tensile modulus and the thickness ratio ranges of the shoulder part and the tire tread are proved to have certain particularity, and the tensile modulus of the belt ply attached with the rubber compound is proved to be 6.0-7.0 MPa, and the shear strain energy belt density of the end point of the rubber compound with higher rubber compound modulus can be inhibited, the durability of the tire is improved. When the modulus is lower than 6.0MPa, the end shear strain and the strain energy density of the belted layer can be increased; when the modulus is higher than 7.0MPa, the strength and fatigue properties of the rubber compound are reduced, resulting in reduced tire performance.
The improved tire tread belt structure has the advantages that the structure is novel, the running is stable, the improved tire tread belt layer can be matched with the improved six-segment arc tire tread or the improved eight-segment arc tire tread through the combination improvement of the tire tread belt layer and the tire tread, and compared with the common tire in the prior art, the tire tread belt structure can reduce the maximum shearing strain of the tire belt layer, optimize the grounding shape of the tire tread, reduce the tire tread stress and further improve 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 attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (9)

1. A low flat wide base all steel radial tire comprising a tire tread and four belt layers, characterized in that the four belt layers comprise a first belt layer (1), a second belt layer (2), a third belt layer (3) and a fourth belt layer (4),
the thickness range of the first belted layer is 1.6-2.0 mm, and the width of the first belted layer meets the following requirements: (80-95%) wide cross section, and the angle range of the cross section and the circumferential direction is 45-60 degrees;
the second band layer is formed by winding a single or a plurality of steel wires side by side, the thickness range of the second band layer is 1.6-2.0 mm, and the width of the second band layer satisfies the following requirements: (75% -90%) wide in cross section, and the angle between the cross section and the circumferential direction is 0 degree;
the thickness range of the third belted layer is 1.8-2.2 mm, and the width of the third belted layer meets the following requirements: (70% -85%) wide in cross section, the included angle between the cross section and the circumferential direction is 10-24 degrees, and the extension direction of the third belt layer is opposite to that of the first belt layer;
the thickness range of the fourth belted layer is 1.8-2.2 mm, and the width of the fourth belted layer meets the following requirements: (40% -60%) wide in cross section, and the included angle between the wide cross section and the circumferential direction is 10-24 degrees, and the extending direction of the fourth belt layer is opposite to that of the first belt layer.
2. A low aspect wide base all steel radial tire as in claim 1, wherein said tire is a flat tireThe outer contour of the axial section of the tire of the surface is formed by sequentially and smoothly connecting n sections of tire tread arcs, wherein n is more than or equal to 6, the n sections of tire tread arcs are respectively and symmetrically distributed along the center point of the tire tread, and the axial horizontal widths of the n sections of tire tread arcs are respectively L1、L2、L3…LnThe tread width of the tire tread is L, and the maximum height difference between the n sections of tread arcs and the central point of the tire tread is h1、h2、h3…hnThe radius of the n sections of tread arcs respectively satisfy R1＝Rn＝K1*(L/2)2/8h1、R2＝Rn-1＝K2*(L/2-L1)2/8h2、R3＝Rn-2＝K3*(L/2-L1-L2)2/8h3、…、R2/n＝R(2/n)+1＝K2/n*(2/L-L1-L2-…-L(2/n)-1)2/8h2/nSaid K is1、K2、K3、…、K2/nThe values of (A) are all within 0.8-4.2.
3. A low flat wide base all steel radial tire according to claim 2, wherein said n is 6, and the radius of said 6 tread arcs satisfies R each1＝R6＝K1*(L/2)2/8h1、R2＝R5＝K2*((L/2-L1))2/8h2、R3＝R4＝K3*(L/2-L1-L2)2/8h3Said K is1Has a value range of 0.8 to 0.9, K2The value range of (A) is 2.0-3.0, K3The value range of (A) is 3.5-4.0.
4. A low aspect wide base all steel radial tire according to claim 3, wherein the axial horizontal widths of said 6 tread segments arc satisfy L respectively1＝L6、L2＝L5Wide cross section (10-20%), L3＝L4Section of ═ 15% -20%The maximum height difference between the 6 segments of tread arcs and the central point of the tire tread respectively satisfies h1＝h6Outer diameter h (1% to 2%)2＝h5＝(20％～50％)*h1、h3＝h4＝(5％～15％)*h1。
5. A low flat wide base all steel radial tire according to claim 2, wherein n is 8, and the radii of the 8 tread arcs satisfy R, respectively1＝R8＝K1*(L/2)2/8h1、R2＝R7＝K2*(L/2-L1)2/8h2、R3＝R6＝K3*(L/2-L1-L2)2/8h3、R4＝R5＝K4*(L/2-L1-L2-L3)2/8h4Said K is1Has a value range of 1.0 to 1.4, K2Has a value range of 1.0 to 1.4, K3Has a value range of 1.3 to 2.0, K4The value range of (A) is 3.8-4.2.
6. A low aspect wide base all steel radial tire according to claim 5, wherein the axial horizontal widths of said 8 tread segments respectively satisfy L1＝L8、L2＝L7Wide cross section (8-12%) and L3＝L6Wide cross section (6-11%), L4＝L5The maximum height difference between the 8 segments of tread arcs and the central point of the tire tread respectively satisfies h1＝h8Outer diameter h (1% to 2%)2＝h7＝(30％～45％)*h1、h3＝h6＝(5％～15％)*h1、h4＝h5＝(1％～5％)*h1。
7. A low aspect wide base all steel radial tire according to claim 2, wherein said n has a value in the range of: n is more than or equal to 6 and less than or equal to 8.
8. The low flat wide base all-steel radial tire according to claim 1, wherein a rubber material is attached to the surface of the four-layer belt layer, and the tensile modulus of the rubber material is 6.0-7.0 MPa.
9. A low aspect wide base all steel radial tire according to claim 8, wherein the tire further comprises a shoulder portion, the thickness ratio of the shoulder portion to the tire tread ranges from: 1.0 to 1.3.
CN202011402085.8A 2020-12-04 2020-12-04 Low flat wide base all-steel radial tire Pending CN112428751A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114714821A (en) * 2022-03-31 2022-07-08 安徽佳通乘用子午线轮胎有限公司 Pneumatic radial tire with improved durability

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GB1474381A (en) * 1973-06-28 1977-05-25 Dunlop Ltd Tyres
CN1994763A (en) * 2005-11-22 2007-07-11 住友橡胶工业株式会社 Heavy duty radial tire
CN201371710Y (en) * 2009-02-23 2009-12-30 杭州中策橡胶有限公司 All-steel radial tire with zero-degree belted layer
CN203957737U (en) * 2014-05-13 2014-11-26 安徽佳通轮胎有限公司 A kind of all-steel load-bearing radial tire
CN207257259U (en) * 2017-09-12 2018-04-20 安徽佳通乘用子午线轮胎有限公司 A kind of racing-car tyre of equation
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

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Publication number Priority date Publication date Assignee Title
GB1474381A (en) * 1973-06-28 1977-05-25 Dunlop Ltd Tyres
CN1994763A (en) * 2005-11-22 2007-07-11 住友橡胶工业株式会社 Heavy duty radial tire
CN201371710Y (en) * 2009-02-23 2009-12-30 杭州中策橡胶有限公司 All-steel radial tire with zero-degree belted layer
CN203957737U (en) * 2014-05-13 2014-11-26 安徽佳通轮胎有限公司 A kind of all-steel load-bearing radial tire
CN207257259U (en) * 2017-09-12 2018-04-20 安徽佳通乘用子午线轮胎有限公司 A kind of racing-car tyre of equation
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114714821A (en) * 2022-03-31 2022-07-08 安徽佳通乘用子午线轮胎有限公司 Pneumatic radial tire with improved durability
CN114714821B (en) * 2022-03-31 2024-02-09 安徽佳通乘用子午线轮胎有限公司 Pneumatic radial tire with improved durability

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