CN112440626A - All-steel radial tire - Google Patents

All-steel radial tire Download PDF

Info

Publication number
CN112440626A
CN112440626A CN202011402179.5A CN202011402179A CN112440626A CN 112440626 A CN112440626 A CN 112440626A CN 202011402179 A CN202011402179 A CN 202011402179A CN 112440626 A CN112440626 A CN 112440626A
Authority
CN
China
Prior art keywords
tread
tire
belt layer
section part
belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011402179.5A
Other languages
Chinese (zh)
Inventor
谷裕
张金船
何金华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Giti Radial Tire Co Ltd
Original Assignee
Anhui Giti Radial Tire Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Giti Radial Tire Co Ltd filed Critical Anhui Giti Radial Tire Co Ltd
Priority to CN202011402179.5A priority Critical patent/CN112440626A/en
Publication of CN112440626A publication Critical patent/CN112440626A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—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
    • B60C2009/1828—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers characterised by special physical properties of the belt ply
    • 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
    • B60C2009/2048—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by special physical properties of the belt plies
    • 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
    • B60C2009/2061—Physical properties or dimensions of the belt coating rubber
    • B60C2009/2064—Modulus; Hardness; Loss modulus or "tangens delta"

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

The invention discloses an 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 first belt layer comprises a left section part, a middle section part and a right section part, 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 central 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 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 belted layer of the tire can be reduced, the uniform grounding shape of the tire is ensured, the tire tread stress is reduced, the durability of the tire is improved, and therefore the tire is reducedThe failure rate.

Description

All-steel radial tire
Technical Field
The invention relates to the field of radial tires, in particular to an 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 invention aims to provide an all-steel radial tire, which solves the problems in the background technology by combining the improvement of the tread size of the radial tire and the size of a belted layer.
In order to achieve the purpose, the invention provides the following technical scheme:
an all-steel radial tire comprises a tire tread and four belted layers,
the four belt layers comprise a first belt layer, a second belt layer, a third belt layer and a fourth belt layer, the first belt layer comprises a left section part, a middle section part and a right section part, the left section part and the right section part of the first belt layer have the same width, the width ranges are 20-30% of the section width, the extending directions of the left section part, the middle section part and the right section part are the same as the circumferential direction of the tire, the thicknesses of the left section part and the right section part and the included angles between the left section part and the right section part and the circumferential direction are the same, the thickness ranges from 1.6 mm to 2.0mm, the extending direction of the middle section part is the same as the extending direction of the left and right section parts, the thickness range of the middle section part is 1.6-2.2 mm, the thickness ranges of the second belt ply, the third belt ply and the fourth belt ply are 1.8-2.2 mm, the extending direction of the second belt layer is the same as the middle section of the first belt layer, and the extending directions of the third belt layer and the fourth belt layer are opposite to the middle section of the first belt layer.
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 included angle ranges of the left section and the right section of the first belt layer and the circumferential direction are both 0-15 degrees, the included angle range of the middle section of the first belt layer and the circumferential direction is 45-60 degrees, and the included angle ranges of the second belt layer, the third belt layer and the fourth belt layer and the circumferential direction are all 10-24 degrees.
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 is respectivelySatisfy 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, and the thickness ratio range of the shoulder portion to the tire tread is as follows: 1.0 to 1.3.
Compared with the prior art, the invention has the beneficial effects that: the tire belt structure is novel in structure, the tire tread profile and the belt structure are optimized, the modulus of the belt rubber is increased, the thickness ratio of the tire tread to the shoulder is controlled, the end point shear strain of the tire belt can be reduced, the uniformity of the grounding shape of the tire is ensured, the durability of the tire is improved, and the failure rate of the tire 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 an embodiment of the present invention, an all-steel radial tire includes a tire tread and four belt layers, where the four belt layers include: the tire comprises a first belt ply 1, a second belt ply 2, a third belt ply 3 and a fourth belt ply 4, wherein the first belt ply comprises a left section part, a middle section part and a right section part, the extension directions of the left section part and the right section part are the same as the circumferential direction of the tire, the thicknesses of the left section part and the right section part are the same as the included angle of the circumferential direction, the thickness ranges from 1.6 mm to 2.0mm, the included angle ranges from 0 degree to 15 degree with the circumferential direction, the extension direction of the middle section part is the same as the extension directions of the left section part and the right section part, the thickness range of the middle section part is 1.6 mm to 2.2mm, the included angle range from 45 degree to 60 degree with the circumferential direction, the extension direction of the second belt ply is the same as the middle section part, the thickness range of the second belt ply is 1.8 mm to 2.2mm, the included angle ranges from 10 degree to 24 degree with the circumferential direction, the extension direction of the third belt ply is opposite to the middle section part, and the thickness range of the third belt ply is 1.8 mm to 2, the included angle range of the fourth belt layer with the circumferential direction is 10-24 degrees, the extending direction of the fourth belt layer is opposite to that of the middle section, the thickness range of the fourth belt layer is 1.8-2.2 mm, and the included angle range of the fourth belt layer with the circumferential direction is 10-24 degrees.
The tire axial section outer contour of the tire tread is formed by sequentially and smoothly connecting n sections of tread arcs, and when n is 6, the radiuses of the 6 sections of tread arcs respectively satisfy 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 (1) is 3.5-4.0, and the axial level of the 6 sections of tread arcsWidth respectively satisfying L1＝L6、L2＝L5Wide cross section (10-20%), L3＝L4The 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。
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:
in the prior art, both a belt ply and a tire tread are improved experimental parts; comparative example 1 is the experimental part with only the tread changed, still using the belt of the prior art; comparative example 2 is the experimental part where only the belt was changed and the tire tread of the prior art was still used; examples 1-3, are the experimental sections of the combination of a belt with a tire tread.
Figure BDA0002817316110000041
Figure BDA0002817316110000051
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 BDA0002817316110000061
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.
Example 2:
in an embodiment of the present invention, an all-steel radial tire includes a tire tread and four belt layers, where the four belt layers include: the tire comprises a first belt ply 1, a second belt ply 2, a third belt ply 3 and a fourth belt ply 4, wherein the first belt ply comprises a left section part, a middle section part and a right section part, the extension directions of the left section part and the right section part are the same as the circumferential direction of the tire, the thicknesses of the left section part and the right section part are the same as the included angle of the circumferential direction, the thickness ranges from 1.6 mm to 2.0mm, the included angle ranges from 0 degree to 15 degree with the circumferential direction, the extension direction of the middle section part is the same as the extension directions of the left section part and the right section part, the thickness range of the middle section part is 1.6 mm to 2.2mm, the included angle range from 45 degree to 60 degree with the circumferential direction, the extension direction of the second belt ply is the same as the middle section part, the thickness range of the second belt ply is 1.8 mm to 2.2mm, the included angle ranges from 10 degree to 24 degree with the circumferential direction, the extension direction of the third belt ply is opposite to the middle section part, and the thickness range of the third belt ply is 1.8 mm to 2, the included angle range of the fourth belt layer with the circumferential direction is 10-24 degrees, the extending direction of the fourth belt layer is opposite to that of the middle section, the thickness range of the fourth belt layer is 1.8-2.2 mm, and the included angle range of the fourth belt layer with the circumferential direction is 10-24 degrees.
The tire axial section outer contour of the tire tread is formed by sequentially and smoothly connecting n sections of tread arcs, and when n is 8, 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 (2) is 3.8-4.2, and the axial horizontal widths of the 8 sections of tread arcs respectively satisfy L1＝L8、L2＝L7Wide cross section (8-12%) and L3＝L6Wide cross section (6-11%), L4＝L5The cross section is wide, and the 8 segments of tread arcs are connected with the tireThe maximum height difference of the central point of the 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 BDA0002817316110000081
Figure BDA0002817316110000091
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 range of the four-layer belt ply is not changed, the crown size corresponding to the tire tread is only improved, the grounding shape of the tire is optimized, and the maximum shear strain and the tire tread stress of the belt ply 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 1 with comparative example 1 gives: the tire treads in example 2 and the comparative example are both tire treads with crown size modification, and the two sets of experiments differ only in that: the four belt layers in the embodiment 2 are all the improved four belt layers of the present invention, wherein the amount of the belt glue film is 6.5MPa, the four belt layers in the comparative example 1 are the belt layers adopted in the prior art, wherein the amount of the belt glue film is less than 6MPa, and the results of two sets of experimental data show that: the tire belt shear strain in the example 2 with the belt rubber film amount increased is obviously smaller than that of the tire with the rubber film amount in the comparative example 1, and further verification can be carried out to obtain: the invention can increase the amount of the belt rubber film to ensure the shear strain and the strain energy density of the endpoint of the belt of a doctor.
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: through the improved design of the crown arc of the belted layer and the tire tread, the end point shear strain of the belted layer can be reduced, the grounding shape can be optimized, the uniformity of the grounding shape of the tire is ensured, and the tire tread stress is reduced.
The invention is 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 BDA0002817316110000101
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 tire tread structure is novel in structure and stable in operation, the tread profile and the belt structure are optimized, the modulus of the belt rubber is increased, the thickness ratio of the tread to the shoulder is controlled, the end point shear strain of the tire belt can be reduced, the uniformity of the grounding shape of the tire is ensured, the tire tread stress is reduced, the durability of the tire is improved, and the failure rate of the tire is reduced.
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. An all-steel radial tire, which comprises a tire tread and four layers of belted layers, and is characterized in that,
the four-layer belt layer comprises a first belt layer (1), a second belt layer (2), a third belt layer (3) and a fourth belt layer (4), the first belt layer comprises a left section part, a middle section part and a right section part, the left section part of the first belt layer is the same as the right section part in width, the width range is 20% -30% of the section width, the extending directions of the left section part, the middle section part and the right section part are the same as the circumferential direction of the tire, the thicknesses of the left section part and the right section part and the included angles between the thicknesses and the circumferential direction are the same, the thickness ranges are 1.6-2.0 mm, the extending direction of the middle section part is the same as the extending directions of the left section part and the right section part, the thickness range of the middle section part is 1.6-2.2 mm, the thickness ranges of the second belt layer, the third belt layer and the fourth belt layer are 1.8-2.2 mm, the extending direction of the second belt layer is the same as the middle section part of the first belt layer, the third belt layer and the fourth belt layer extend in the opposite direction to the middle section of the first belt layer.
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.
2. The all-steel radial tire according to claim 1, wherein the included angles of the left and right sections of the first belt layer with the circumferential direction are both 0 ° to 15 °, the included angle of the middle section of the first belt layer with the circumferential direction is 45 ° to 60 °, and the included angles of the second belt layer, the third belt layer and the fourth belt layer with the circumferential direction are all 10 ° to 24 °.
3. An all-steel radial tire according to claim 1, wherein n is 6, and the radii of the 6 tread arcs satisfy R, respectively1＝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. An all-steel radial tire according to claim 3, wherein the axial horizontal widths of said 6 tread segments arc satisfy L1＝L6、L2＝L5Wide cross section (10-20%), L3＝L4The 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. An all-steel radial tire according to claim 1, 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. An all-steel radial tire according to claim 5, wherein the 8 segments of tread arc respectively satisfy L in axial horizontal width1＝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. The all-steel radial tire according to claim 1, wherein the value range of n is: n is more than or equal to 6 and less than or equal to 8.
8. The all-steel radial tire according to claim 1, wherein a rubber material is attached to the surface of the four belt layers, and the tensile modulus of the rubber material is 6.0-7.0 MPa.
9. An all-steel radial tire as in claim 8, wherein said tire further comprises a shoulder, said shoulder to tire tread thickness ratio ranging from: 1.0 to 1.3.
CN202011402179.5A 2020-12-04 2020-12-04 All-steel radial tire Pending CN112440626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011402179.5A CN112440626A (en) 2020-12-04 2020-12-04 All-steel radial tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011402179.5A CN112440626A (en) 2020-12-04 2020-12-04 All-steel radial tire

Publications (1)

Publication Number Publication Date
CN112440626A true CN112440626A (en) 2021-03-05

Family

ID=74739998

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011402179.5A Pending CN112440626A (en) 2020-12-04 2020-12-04 All-steel radial tire

Country Status (1)

Country Link
CN (1) CN112440626A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116502507A (en) * 2023-06-25 2023-07-28 广饶县计量测试检定所(广饶县产品质量检验所、广饶县橡胶轮胎产品与材料质量检验中心) Simulation evaluation method for delamination damage performance in truck meridian wheel crown

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116502507A (en) * 2023-06-25 2023-07-28 广饶县计量测试检定所(广饶县产品质量检验所、广饶县橡胶轮胎产品与材料质量检验中心) Simulation evaluation method for delamination damage performance in truck meridian wheel crown
CN116502507B (en) * 2023-06-25 2023-08-29 广饶县计量测试检定所(广饶县产品质量检验所、广饶县橡胶轮胎产品与材料质量检验中心) Simulation evaluation method for delamination damage performance in truck meridian wheel crown

Similar Documents

Publication Publication Date Title
CN214396274U (en) Low flat wide base all-steel radial tire
EP2065511B1 (en) Rubber reinforcing steel cord and pneumatic radial tire
CN112440626A (en) All-steel radial tire
JPH04314603A (en) Pneumatic radial tire for passenger car
AU671400B2 (en) Heavy duty pneumatic radial tires
WO2014129380A1 (en) Tire
CN1809474A (en) Pneumatic tire
CN102407736A (en) A pneumatic tire and method for making the pneumatic tire
WO2007083761A1 (en) Rubber-steel cord composite and tire using the same
JP5078055B2 (en) Rubber-steel cord composite
CN112428751A (en) Low flat wide base all-steel radial tire
CN214396275U (en) All-steel radial tire
KR101601202B1 (en) Passenger radial tires with ultra fine steel cord
JP2019217899A (en) Pneumatic tire
JPH04314605A (en) Pneumatic radial tire for passenger car
WO2012105268A1 (en) Cord for reinforcing rubber article, and pneumatic tyre
JPH0596907A (en) Pneumatic tire
CN214112186U (en) Tire tread and pneumatic tire
JP5072226B2 (en) Pneumatic radial tire for motorcycles
CN203818934U (en) All steel radial tire adopting winding steel wire belt ply reinforcement at shoulder part
CN1264700C (en) Automoblie tyre
JP2012020673A (en) Pneumatic tire
JPH04169304A (en) Pneumatic tire
JPH04110206A (en) Automotive radial tire
JPH0379403A (en) Pneumatic radial tire

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination