CN111016547B - Giant radial tire with improved tire bead durability - Google Patents
Giant radial tire with improved tire bead durability Download PDFInfo
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- CN111016547B CN111016547B CN201911365447.8A CN201911365447A CN111016547B CN 111016547 B CN111016547 B CN 111016547B CN 201911365447 A CN201911365447 A CN 201911365447A CN 111016547 B CN111016547 B CN 111016547B
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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
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
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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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
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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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles
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Abstract
The invention discloses a giant radial tire with improved tire bead durability, which comprises a tire crown, a tire side, an inner liner, a belt ply and a tire bead, wherein the tire body comprises a main tire body and a turn-up tire body, the tire bead comprises a steel wire ring, an upper triangular rubber, a lower triangular rubber, a bead opening protecting rubber, a steel wire bead opening wrapping cloth, a nylon bead opening wrapping cloth and a molding rubber, the tire body cord fabric of the tire is turned up and wrapped by the steel wire ring, the outer side of the steel wire bead opening wrapping cloth is positioned between the turn-up tire body cord fabric, the molding rubber and the bead opening protecting rubber, and the inner side of the steel wire bead opening wrapping cloth is positioned between the tire body cord fabric and the nylon bead opening wrapping cloth. According to the giant radial tire, the structural design of the tire bead is optimized, so that all parts in the tire bead structure act synergistically, the durability of the tire bead of the giant radial tire is obviously improved, the performance of the tire bead of the giant radial tire is improved, and the service life of the tire bead of the giant radial tire is prolonged. The giant radial tire has the characteristics of simple preparation process and high production efficiency, is suitable for large-scale production of enterprises, and has remarkable economic and social benefits.
Description
Technical Field
The invention belongs to the technical field of tire preparation, and particularly relates to a giant radial tire with improved tire bead durability.
Background
The mining tire is developed to the present day, and the medium and small-sized engineering radial tire can not meet the mining requirement of a mine. In order to provide labor productivity and adapt to relevant operating conditions, the national mining equipment giant heads such as carter, pinus xiao, libehal and the like produce mining rigid dump trucks with the load of more than 90 tons, and the mining rigid dump trucks have very strict requirements on the performance of giant radial tires, particularly have the characteristics of high load, special use environment and stress of tire bead positions and have higher requirements on the durability of the tire beads. Even if the tires such as the leading pristine and michelin in the industry cross the country, the problem of bead bulge failure often occurs in the market. The bead drum is a huge radial tire and is a worldwide problem.
Tire enterprises in China start late in the field of giant radial tire research, are obviously insufficient in the field of technical and scientific innovation, and bead bulges frequently occur in the market, so that the quality of giant radial tires in China is seriously affected, and the market competitiveness with international brands is weakened. To change this situation, it is urgently required to improve the durability of the bead of the giant radial tire.
Disclosure of Invention
In order to solve the above problems, a giant radial tire having improved bead durability has been proposed.
The invention provides the following technical scheme:
the giant radial tire with the improved tire bead durability comprises a tire crown, a tire side, an inner liner, a belt ply, a tire bead and a tire body, wherein the tire body comprises a main tire body and a turn-up tire body, the tire bead comprises a steel wire ring, an upper triangular rubber, a lower triangular rubber, a bead opening protecting rubber, a steel wire bead opening wrapping cloth, a nylon bead opening wrapping cloth and a molding rubber, the tire body curtain cloth of the tire is turned up to wrap the steel wire ring, the outer side of the steel wire bead opening wrapping cloth is located between the turn-up tire body curtain cloth, the molding rubber and the bead opening protecting rubber, and the inner side of the steel wire bead opening wrapping cloth is located between the tire body curtain cloth and the nylon bead opening wrapping cloth.
Further, the height Hc = Ht + alpha of the steel wire ring for reversely wrapping the tire body cord fabric of the tire, Ht is the radius of the widest point of the section of the tire, and the coefficient alpha is 0-100 mm.
Further, the number of the steel wire mouth wrapping cloth is 1-2, the difference level is 15-30 mm, the outer end point of the steel wire mouth wrapping cloth is located on the top horizontal edge of the steel wire ring, the distance between the outer end point and the top horizontal edge of the steel wire ring is Hwo = Hb beta, Hb is the height of the tire bead, the coefficient beta is 0.2-0.6, the inner end point of the steel wire mouth wrapping cloth is located on the top horizontal edge of the steel wire ring, the distance between the inner end point and the top horizontal edge of the steel wire ring is Hwi = Hb gamma, and the coefficient gamma is 1-2.5.
Furthermore, the nylon bead filler cloth comprises 2-6 layers, the difference level is 15-30 mm, the upper end point of the nylon bead filler cloth is located above the horizontal edge of the top of the steel wire ring, the distance between the upper end point of the nylon bead filler cloth and the horizontal edge of the top of the steel wire ring is Hno = Hwi + delta, the coefficient delta is 30-100 mm, the lower end point of the nylon bead filler cloth is located between the intersection point of the horizontal edge of the bottom of the steel wire ring and the nylon bead filler cloth and the right lower side of the center of the steel wire ring, the length from the horizontal edge of the bottom of the steel wire ring to the bottom of the steel wire ring is Lnd = Bw/2 & epsilon, and the coefficient epsilon is 0-1.
Further, the lower end point of the upper triangular glue is arranged above the horizontal edge of the top of the bead ring, and the distance coefficient zeta between the lower end point of the upper triangular glue and the horizontal edge of the top of the bead ring is 0-50 mm; and the height of an end point on the lower triangular glue is Hau = Hf 1.18+ eta, Hf is the height of the wheel rim, and the coefficient eta is-20-60 mm.
Furthermore, the height of the outer end point of the bead protection rubber is Hpo = Hf 1.18+ theta, the coefficient theta is-20-60 mm, the inner end point of the bead protection rubber is located above the horizontal edge of the top of the steel wire ring, the distance from the horizontal edge of the top of the steel wire ring is Hpi = Hb iota, and the coefficient iota is 0.5-2.
Further, the sidewall lower endpoint height Hsd = Hf 1.18-kappa and the coefficient kappa is 0-120 mm.
Furthermore, the lower end point of the molding compound is arranged above the horizontal edge of the top of the steel wire ring, and the distance coefficient lambda between the lower end point of the molding compound and the horizontal edge of the top of the steel wire ring is 0-30 mm.
Furthermore, the vertical distance Lg = Lrl mu between the outer side of the tire and the center of the turn-up tire body at the height Hf 1.18, the Lrl is the vertical distance between the outer side of the tire and the center of the main tire body at the height Hf 1.18, and the coefficient mu is 0.6-0.8.
Further, the vertical distance Lu = Lrld v between the outer side of the tire and the center of the turnup carcass at the height Hf 1.18 0.75, Lrld is the vertical distance between the outer side of the tire and the center of the main carcass at the height Hf 1.18 0.75, and the coefficient v is 0.3-0.7.
Advantageous effects
The invention provides a giant radial tire with improved tire bead durability, which is characterized in that the tire bead structure design of the tire is optimized, so that all parts in the tire bead structure act synergistically, the tire bead durability of the giant radial tire is obviously improved, the tire bead performance of the tire is improved, and the service life of the tire is prolonged. The giant radial tire has the characteristics of simple preparation process and high production efficiency, is suitable for large-scale production of enterprises, and has remarkable economic and social benefits.
Drawings
FIG. 1 is a schematic structural view of a giant radial tire according to embodiments 1-4 of the present invention.
FIG. 2 is a schematic view of the structure of giant radial tires of examples 5 and 6 of the present invention.
In the drawings: 1-steel wire ring, 2-lower apex, 3-upper apex, 4-tire body, 5-belt ply, 6-steel wire bead filler, 7-nylon bead filler, 8-inner liner, 9-tire crown, 10-tire side, 11-type rubber and 12-bead protection rubber.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustrating the present invention and not for limiting the present invention.
The invention adopts a method for improving the durability of the giant radial tire bead to manufacture a 27.00R49 giant radial tire, and a 19.5/4.0 inch standard rim is installed. The tire comprises a tire crown, a tire side, a tire body (a main tire body and a reversely wrapped tire body), an inner liner (an airtight layer and a transition layer), a belt ply, a tire bead and the like, wherein the tire bead comprises a steel wire ring, an upper triangular rubber, a lower triangular rubber, a bead mouth protecting rubber, a steel wire bead mouth wrapping cloth, a nylon bead mouth wrapping cloth, the main tire body, the reversely wrapped tire body, a molding rubber, the tire side, the airtight layer and the transition layer.
Further, the tyre carcass cord fabric is reversely wrapped on the steel wire ring, the reverse wrapping height Hc = Ht + alpha, Ht is the radius of the widest point of the tyre section, the coefficient alpha is 0-100 mm, and preferably, the coefficient alpha is 0-60 mm.
Further, the bead filler cloth is 1-2 layers (preferably 1 layer), the difference level is 15-30 mm, the outer side of the bead filler cloth is located between the turned-over carcass cord fabric, the molding compound and the bead filler, the outer end point of the bead filler cloth is located above the horizontal edge of the top of the bead ring, the distance between the outer end point of the bead filler cloth and the horizontal edge of the top of the bead ring is Hwo = Hb beta, Hb is the height of the bead ring, and the coefficient beta is 0.2-0.6 (as an optimal coefficient beta, 0.3-0.5). The inner side of the steel wire bead wrapping cloth is located between the tire body cord fabric and the nylon bead wrapping cloth, the inner end point of the steel wire bead wrapping cloth is located above the horizontal edge of the top of the steel wire ring, the distance between the inner end point of the steel wire bead wrapping cloth and the horizontal edge of the top of the steel wire ring is Hwi = Hb gamma, the coefficient gamma is 1-2.5, and the optimal coefficient gamma is 1-1.5.
Further, the nylon bead filler cloth is 2-6 layers (preferably 2-4 layers), the difference is 15-30 mm (preferably 20-25 mm), the upper end point of the nylon bead filler cloth is located above the horizontal edge of the top of the steel wire ring, the distance from the upper end point of the nylon bead filler cloth to the horizontal edge of the top of the steel wire ring is Hno = Hwi + delta, the coefficient delta is 30-100 mm (40-80 mm as the preferred coefficient delta), the lower end point of the nylon bead filler cloth is located between the intersection point of the horizontal edge of the bottom of the steel wire ring and the nylon bead filler cloth and the center of the steel wire ring, the length from the horizontal edge of the bottom of the steel wire ring is Lnd = Bw/2 epsilon, the Bw is the width of the steel wire ring, and the coefficient epsilon is 0-1 (0.2-0.8 as the preferred coefficient epsilon).
Further, the lower end point of the upper triangular glue is arranged above the horizontal edge of the top of the bead ring, and the distance coefficient zeta between the lower end point of the upper triangular glue and the horizontal edge of the top of the bead ring is 0-50 mm (as the optimal coefficient zeta, 10-30 mm); the height of the upper triangular glue end point is Hau = Hf 1.18+ eta, Hf is the height of the wheel rim, and the coefficient eta is-20-60 mm (the preferable coefficient eta is-15-50 mm).
The height of the outer end point of the bead protection glue is Hpo = Hf 1.18+ theta, the coefficient theta is-20-60 mm (10-50 mm is taken as the optimal coefficient theta), the inner end point of the bead protection glue is located above the top horizontal edge of the steel wire ring, the distance between the inner end point of the bead protection glue and the top horizontal edge of the steel wire ring is Hpi = Hb iota, and the coefficient iota is 0.5-2 (1-1.5 is taken as the optimal coefficient iota).
Further, the sidewall lower endpoint height Hsd = Hf 1.18- κ, and the coefficient κ is 0 to 120mm (preferably, the coefficient κ is 40 to 120 mm).
Furthermore, the lower end point of the molding compound is arranged above the horizontal edge of the top of the steel wire ring, and the distance coefficient lambda between the lower end point of the molding compound and the horizontal edge of the top of the steel wire ring is 0-30 mm (the preferable coefficient lambda is 10-30 mm).
Further, the outer side of the tire at the height Hf 1.18 is perpendicular to the center of the turn-up carcass by the distance Lg = Lrl μ, Lrl is perpendicular to the center of the main carcass at the height Hf 1.18, and the coefficient μ is 0.6 to 0.8 (preferably, the coefficient μ is 0.65 to 0.75).
Further, the vertical distance Lu = Lrld v between the outer side of the tire and the center of the turn-up carcass at the height Hf 1.18 x 0.75, Lrld is the vertical distance between the outer side of the tire and the center of the main carcass at the height Hf 1.18 x 0.75, and the coefficient v is 0.3-0.7 (preferably, the coefficient v is 0.45-0.65).
The invention aims to improve the durability of a giant radial tire bead. In the technical scheme, the giant radial tire comprises a tire crown, a tire side, a tire body (a main tire body and a reverse tire body), an inner liner (an airtight layer and a transition layer), a belt ply, a tire bead and other components, wherein the tire bead structure comprises a steel wire ring, an upper triangular rubber, a lower triangular rubber, a bead mouth protecting rubber, a steel wire bead mouth wrapping cloth, a nylon bead mouth wrapping cloth, the main tire body, the reverse tire body, a molding rubber, the tire side, the airtight layer and the transition layer which are in synergistic action, and the durability of the tire bead of the giant radial tire is improved jointly. The bead ring, the lower triangular rubber and the upper triangular rubber are matched, the bead ring with the highest hardness is gradually transited to the upper rubber core with the low hardness, the position of the bead ring is deformed when the bead ring is loaded, the hardness of the lower triangular rubber of the bead ring is high, the rigidity is high, the deformation of the bead ring is reduced, and meanwhile, the lower triangular rubber and the upper triangular rubber are effectively combined, so that the uneven stress distribution and poor transition are avoided; the tire bead wrapping cloth, the nylon bead wrapping cloth and the main tire body wrap the tire body, when the tire is loaded, the tire bead position deforms, the steel bead wrapping cloth, the nylon bead wrapping cloth and the tire body restrain excessive deformation, excessive shearing of the main tire body and the reversely wrapped tire body is avoided, and excessive extrusion deformation of a rim to the outer contour of the tire bead is reduced; the rubber compound, the tire side and the bead protection rubber ensure that the thickness from a turned tire body to the outer contour of the tire bead is proper, the extrusion deformation of the rim to the outer contour of the tire bead is reduced, the complex stress of shearing, extrusion deformation and the like of the rubber compound, the tire side and the bead protection rubber is shared, the heat generation is reduced, the fatigue resistance time of the rubber compound is prolonged, and the service life of the tire bead is prolonged.
The tire can be processed based on the existing manufacturing equipment, and the tire bead durability is obviously improved by optimizing the structural design of the tire bead, so that the performance of the tire bead is improved, and the service life of the tire bead is prolonged. Meanwhile, the giant radial tire of the invention also has the advantages of simple preparation process, high production efficiency, suitability for mass production of enterprises and remarkable economic and social benefits.
The technical solution of the present invention is further illustrated by the following examples.
Example 1:
as shown in FIG. 1, a 27.00R49 giant radial tire was made and mounted on a 19.5/4.0 inch standard rim as follows. The tire comprises a tire crown, a tire side, a tire body (a main tire body and a reversely wrapped tire body), an inner liner (an airtight layer and a transition layer), a belt ply, a tire bead and other components, wherein the tire bead structure comprises a steel wire ring, an upper triangular rubber, a lower triangular rubber, a bead mouth protecting rubber, a steel wire bead mouth wrapping cloth, a nylon bead mouth wrapping cloth, the main tire body, the reversely wrapped tire body, a molding rubber, the tire side, the airtight layer and the transition layer. The tyre body cord fabric of the tyre is reversely wrapped by the steel wire ring, the reverse wrapping height Hc = Ht + alpha, Ht is the radius of the widest point of the section of the tyre, and the coefficient alpha is 50 mm; the steel wire bead wrapping cloth is 1 layer, the difference level is 25mm, the outer side of the steel wire bead wrapping cloth is positioned between the reversely wrapped tire body cord cloth, the molding compound and the bead protecting compound, the outer end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the outer end point and the horizontal edge of the top of the steel wire ring is Hwo = Hb beta, the height of the Hb tire bead is 0.35, the inner side of the steel wire bead wrapping cloth is positioned between the tire body cord cloth and the nylon bead wrapping cloth, the inner end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the inner end point and the horizontal edge of the top of the steel wire ring is Hwi = Hb gamma, and the coefficient gamma is 1.3; the nylon bead wrapping cloth is 2 layers, the difference level is 25mm, the upper end point of the nylon bead wrapping cloth is positioned above the horizontal edge of the top of the steel wire ring, the distance between the upper end point and the horizontal edge of the top of the steel wire ring is Hno = Hwi + delta, the coefficient delta is 60mm, the lower end point of the nylon bead wrapping cloth is positioned between the intersection point of the horizontal edge of the bottom of the steel wire ring and the nylon bead wrapping cloth and the right lower part of the center of the steel wire ring, the length from the horizontal edge of the bottom of the steel wire ring to the bottom of the steel wire ring is Lnd = Bw/2 epsilon, and the coefficient epsilon is 0.5; the lower end point of the upper triangular glue is positioned above the horizontal edge of the top of the bead ring, and the distance coefficient zeta between the lower end point of the upper triangular glue and the horizontal edge of the top of the bead ring is 20 mm; the height of an end point on the lower triangular glue is Hau = Hf 1.18+ eta, Hf is the height of a wheel rim, and the coefficient eta is 30 mm; the height of an outer end point of the bead protection glue is Hpo = Hf 1.18+ theta, the coefficient theta is 30mm, an inner end point of the bead protection glue is positioned above the horizontal edge of the top of the steel traveler, the distance between the inner end point and the horizontal edge of the top of the steel traveler is Hpi = Hb iota, and the coefficient iota is 1; the sidewall lower endpoint height, Hsd = Hf 1.18- κ, coefficient κ of 80 mm; the lower end point of the molding compound is arranged above the horizontal edge of the top of the steel wire ring, and the distance coefficient lambda between the lower end point of the molding compound and the horizontal edge of the top of the steel wire ring is 20 mm. The outer side of the tire at the height of Hf 1.18 is vertically distant from the center of the turnup carcass, Lg = Lrl μ, Lrl is the vertical distance between the outer side of the tire at the height of Hf 1.18 and the center of the main carcass, and the coefficient μ is 0.7; and the outer side of the tire at the height of Hf 1.18 0.75 is vertically distant from the center of the turnup carcass, Lu = Lrld v, and Lrld is the vertical distance between the outer side of the tire at the height of Hf 1.18 0.75 and the center of the main carcass, and the coefficient v is 0.5.
Through experimental tests, the endurance of the bead of the 27.00R49 giant radial tire is 335h, 553 pieces of 27.00R49 are produced in batches, the maximum service hour of the copper molybdenum ore in Manchuria is 6573h, the average service hour is 5100h, the tread is polished and forcibly scrapped, meanwhile, the bead is frequently assembled and disassembled, and the bead failure rate is less than 5%; 24 strips of 27.00R49 are produced in batches, the average service hours in Yimin river coal mines is 12000h, and the treads are polished and discarded.
Example 2:
as shown in FIG. 1, a 27.00R49 giant radial tire was made and mounted on a 19.5/4.0 inch standard rim as follows. The tire comprises a tire crown, a tire side, a tire body (a main tire body and a reversely wrapped tire body), an inner liner (an airtight layer and a transition layer), a belt ply, a tire bead and other components, wherein the tire bead structure comprises a steel wire ring, an upper triangular rubber, a lower triangular rubber, a bead mouth protecting rubber, a steel wire bead mouth wrapping cloth, a nylon bead mouth wrapping cloth, the main tire body, the reversely wrapped tire body, a molding rubber, the tire side, the airtight layer and the transition layer. The tyre body cord fabric of the tyre is reversely wrapped on the steel wire ring, the reverse wrapping height Hc = Ht + alpha, Ht is the radius of the widest point of the section of the tyre, and the coefficient alpha is 30 mm; the steel wire bead wrapping cloth is 1 layer, the difference level is 25mm, the outer side of the steel wire bead wrapping cloth is positioned between the reversely wrapped tire body cord cloth, the molding compound and the bead protecting compound, the outer end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the outer end point and the horizontal edge of the top of the steel wire ring is Hwo = Hb beta, the height of the Hb tire bead is 0.4, the inner side of the steel wire bead wrapping cloth is positioned between the tire body cord cloth and the nylon bead wrapping cloth, the inner end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the inner end point and the horizontal edge of the top of the steel wire ring is Hwi = Hb gamma, and the coefficient gamma is 1.2; the nylon bead wrapping cloth is 4 layers, the difference level is 25mm, the upper end point of the nylon bead wrapping cloth is positioned above the horizontal edge of the top of the steel wire ring, the distance between the upper end point and the horizontal edge of the top of the steel wire ring is Hno = Hwi + delta, the coefficient delta is 70 mm, the lower end point of the nylon bead wrapping cloth is positioned between the intersection point of the horizontal edge of the bottom of the steel wire ring and the nylon bead wrapping cloth and the right lower part of the center of the steel wire ring, the length from the horizontal edge of the bottom of the steel wire ring to the bottom of the steel wire ring is Lnd = Bw/2 epsilon, and the coefficient epsilon is 0.3; the lower end point of the upper triangular glue is positioned above the horizontal edge of the top of the bead ring, and the distance coefficient zeta between the lower end point of the upper triangular glue and the horizontal edge of the top of the bead ring is 20 mm; the height of an end point on the lower triangular glue is Hau = Hf 1.18+ eta, Hf is the height of a wheel rim, and the coefficient eta is 30 mm; the height of an outer end point of the bead protection glue is Hpo = Hf 1.18+ theta, the coefficient theta is 30mm, an inner end point of the bead protection glue is located above the horizontal edge of the top of the steel traveler, the distance between the inner end point and the horizontal edge of the top of the steel traveler is Hpi = Hb iota, and the coefficient iota is 1.5; the sidewall lower endpoint height, Hsd = Hf 1.18- κ, coefficient κ of 60 mm; the lower end point of the molding compound is arranged above the horizontal edge of the top of the steel wire ring, and the distance coefficient lambda between the lower end point of the molding compound and the horizontal edge of the top of the steel wire ring is 10 mm. The outer side of the tire at the height of Hf 1.18 is vertically distant from the center of the turnup carcass, Lg = Lrl μ, Lrl is the vertical distance between the outer side of the tire at the height of Hf 1.18 and the center of the main carcass, and the coefficient μ is 0.66; the outer side of the tire at the height of Hf 1.18 0.75 is vertically distant from the center of the turnup carcass, Lu = Lrld v, Lrld is the vertical distance between the outer side of the tire at the height of Hf 1.18 0.75 and the center of the main carcass, and the coefficient v is 0.55; the 27.00R49 giant radial tire has a bead endurance of 322 h.
Example 3
As shown in FIG. 1, a 27.00R49 giant radial tire was made and mounted on a 19.5/4.0 inch standard rim as follows. The tire comprises a tire crown, a tire side, a tire body (a main tire body and a reversely wrapped tire body), an inner liner (an airtight layer and a transition layer), a belt ply, a tire bead and other components, wherein the tire bead structure comprises a steel wire ring, an upper triangular rubber, a lower triangular rubber, a bead mouth protecting rubber, a steel wire bead mouth wrapping cloth, a nylon bead mouth wrapping cloth, the main tire body, the reversely wrapped tire body, a molding rubber, the tire side, the airtight layer and the transition layer. The tyre body cord fabric of the tyre is reversely wrapped by the steel wire ring, the reverse wrapping height Hc = Ht + alpha, Ht is the radius of the widest point of the section of the tyre, and the coefficient alpha is 0; the steel wire bead wrapping cloth is 1 layer, the outer side of the steel wire bead wrapping cloth is positioned between the reversely wrapped tire body cord fabric, the molding compound and the bead protection compound, the outer end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the outer end point and the horizontal edge of the top of the steel wire ring is Hwo = Hb beta, the height of the Hb tire bead is 0.2, the inner side of the steel wire bead wrapping cloth is positioned between the tire body cord fabric and the nylon bead wrapping cloth, the inner end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the inner end point and the horizontal edge of the top of the steel wire ring is Hwi = Hb gamma, and the coefficient gamma is 1; the nylon seam allowance wrapping cloth is 2 layers, the difference is 15, the upper end point of the nylon seam allowance wrapping cloth is positioned above the horizontal edge of the top of the steel wire ring, the distance between the upper end point and the horizontal edge of the top of the steel wire ring is Hno = Hwi + delta, the coefficient delta is 30mm, the lower end point of the nylon seam allowance wrapping cloth is positioned between the intersection point of the horizontal edge of the bottom of the steel wire ring and the nylon seam allowance wrapping cloth and the right lower part of the center of the steel wire ring, the length from the horizontal edge of the bottom of the steel wire ring to the bottom of the steel wire ring is Lnd = Bw/2 epsilon, and the coefficient epsilon is 0; the lower end point of the upper triangular glue is positioned above the horizontal edge of the top of the bead ring, and the distance coefficient zeta between the lower end point of the upper triangular glue and the horizontal edge of the top of the bead ring is 0; the height of an end point on the lower triangular glue is Hau = Hf 1.18+ eta, Hf is the height of a wheel rim, and the coefficient eta is-20; the height of an outer end point of the bead protection glue is Hpo = Hf 1.18+ theta, the coefficient theta is-20, an inner end point of the bead protection glue is positioned above the top horizontal edge of the steel wire ring, the distance between the inner end point and the top horizontal edge of the steel wire ring is Hpi = Hb iota, and the coefficient iota is 0.5; the sidewall lower endpoint height, Hsd = Hf 1.18- κ, coefficient κ being 0; the lower end point of the molding compound is positioned above the horizontal edge of the top of the steel wire ring, and the distance coefficient lambda between the lower end point of the molding compound and the horizontal edge of the top of the steel wire ring is 0; the outer side of the tire at the height of Hf 1.18 is vertically distant from the center of the turnup carcass, Lg = Lrl μ, Lrl is the vertical distance between the outer side of the tire at the height of Hf 1.18 and the center of the main carcass, and the coefficient μ is 0.6; the outer side of the tire at the height of Hf 1.18 0.75 is vertically distant from the center of the turnup carcass, Lu = Lrld v, Lrld is the vertical distance between the outer side of the tire at the height of Hf 1.18 0.75 and the center of the main carcass, and the coefficient v is 0.4; the 27.00R49 giant radial tire has a bead endurance of 253 h.
Example 4
As shown in FIG. 1, a 27.00R49 giant radial tire was made and mounted on a 19.5/4.0 inch standard rim as follows. The tire comprises a tire crown, a tire side, a tire body (a main tire body and a reversely wrapped tire body), an inner liner (an airtight layer and a transition layer), a belt ply, a tire bead and other components, wherein the tire bead structure comprises a steel wire ring, an upper triangular rubber, a lower triangular rubber, a bead mouth protecting rubber, a steel wire bead mouth wrapping cloth, a nylon bead mouth wrapping cloth, the main tire body, the reversely wrapped tire body, a molding rubber, the tire side, the airtight layer and the transition layer. The tyre body cord fabric of the tyre is reversely wrapped by the steel wire ring, the reverse wrapping height Hc = Ht + alpha, Ht is the radius of the widest point of the section of the tyre, and the coefficient alpha is 100 mm; the steel wire bead wrapping cloth is 2 layers, the difference level is 30mm, the outer side of the steel wire bead wrapping cloth is positioned between the reversely wrapped tire body cord cloth, the molding compound and the bead protecting compound, the outer end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the outer end point and the horizontal edge of the top of the steel wire ring is Hwo = Hb beta, the height of the Hb tire bead is 0.6, the inner side of the steel wire bead wrapping cloth is positioned between the tire body cord cloth and the nylon bead wrapping cloth, the inner end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the inner end point and the horizontal edge of the top of the steel wire ring is Hwi = Hb gamma, and the coefficient gamma is 2.5; the nylon seam allowance wrapping cloth is 6 layers, the difference level is 30mm, the upper end point of the nylon seam allowance wrapping cloth is positioned above the horizontal edge of the top of the steel wire ring, the distance between the upper end point and the horizontal edge of the top of the steel wire ring is Hno = Hwi + delta, the coefficient delta is 100mm, the lower end point of the nylon seam allowance wrapping cloth is positioned between the intersection point of the horizontal edge of the bottom of the steel wire ring and the nylon seam allowance wrapping cloth and the right lower part of the center of the steel wire ring, the length from the horizontal edge of the bottom of the steel wire ring to the bottom of the steel wire ring is Lnd = Bw/2 epsilon, and the coefficient epsilon is 1; the lower end point of the upper triangular glue is positioned above the horizontal edge of the top of the bead ring, and the distance coefficient zeta between the lower end point of the upper triangular glue and the horizontal edge of the top of the bead ring is 50 mm; the height of an end point on the lower triangular glue is Hau = Hf 1.18+ eta, Hf is the height of a wheel rim, and the coefficient eta is 60 mm; the height of an outer end point of the bead protection glue is Hpo = Hf 1.18+ theta, the coefficient theta is 60mm, an inner end point of the bead protection glue is positioned above the top horizontal edge of the steel wire ring, the distance between the inner end point and the top horizontal edge of the steel wire ring is Hpi = Hb iota, and the coefficient iota is 2; the sidewall lower endpoint height, Hsd = Hf 1.18- κ, coefficient κ of 120 mm; the lower end point of the molding compound is positioned above the horizontal edge of the top of the steel wire ring, and the distance coefficient lambda between the lower end point of the molding compound and the horizontal edge of the top of the steel wire ring is 30 mm. The outer side of the tire at the height of Hf 1.18 is vertically distant from the center of the turnup carcass, Lg = Lrl μ, Lrl is the vertical distance between the outer side of the tire at the height of Hf 1.18 and the center of the main carcass, and the coefficient μ is 0.8; the outer side of the tire at the height of Hf 1.18 0.75 is vertically distant from the center of the turnup carcass, Lu = Lrld v, Lrld is the vertical distance between the outer side of the tire at the height of Hf 1.18 0.75 and the center of the main carcass, and the coefficient v is 0.7; the 27.00R49 giant radial tire has a bead endurance of 288 h.
Example 5
As shown in FIG. 2, a 27.00R49 giant radial tire was made and mounted on a 19.5/4.0 inch standard rim as follows. The tire comprises a tire crown, a tire side, a tire body (a main tire body and a reversely wrapped tire body), an inner liner (an airtight layer and a transition layer), a belt ply, a tire bead and other components, wherein the tire bead structure comprises a steel wire ring, an upper triangular rubber, a lower triangular rubber, a bead mouth protecting rubber, a steel wire bead mouth wrapping cloth, a nylon bead mouth wrapping cloth, the main tire body, the reversely wrapped tire body, a molding rubber, the tire side, the airtight layer and the transition layer. The tyre body cord fabric of the tyre is reversely wrapped by the steel wire ring, the reverse wrapping height Hc = Ht + alpha, Ht is the radius of the widest point of the section of the tyre, and the coefficient alpha is 0 mm; the steel wire bead wrapping cloth is 1 layer, the difference level is 25mm, the outer side of the steel wire bead wrapping cloth is positioned between the reversely wrapped tire body cord cloth, the molding compound and the bead protecting compound, the outer end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the outer end point and the horizontal edge of the top of the steel wire ring is Hwo = Hb beta, the height of the Hb tire bead is 0.35, the inner side of the steel wire bead wrapping cloth is positioned between the tire body cord cloth and the nylon bead wrapping cloth, the inner end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the inner end point and the horizontal edge of the top of the steel wire ring is Hwi = Hb gamma, and the coefficient gamma is 1.3; the nylon bead wrapping cloth is 2 layers, the difference level is 25mm, the upper end point of the nylon bead wrapping cloth is positioned above the horizontal edge of the top of the steel wire ring, the distance between the upper end point and the horizontal edge of the top of the steel wire ring is Hno = Hwi + delta, the coefficient delta is 60mm, the lower end point of the nylon bead wrapping cloth is positioned between the intersection point of the horizontal edge of the bottom of the steel wire ring and the nylon bead wrapping cloth and the right lower part of the center of the steel wire ring, the length from the horizontal edge of the bottom of the steel wire ring to the bottom of the steel wire ring is Lnd = Bw/2 epsilon, and the coefficient epsilon is 0.5; the lower end point of the upper triangular glue is positioned above the horizontal edge of the top of the bead ring, and the distance coefficient zeta between the lower end point of the upper triangular glue and the horizontal edge of the top of the bead ring is 20 mm; the height of an end point on the lower triangular glue is Hau = Hf 1.18+ eta, Hf is the height of a wheel rim, and the coefficient eta is 30 mm; the height of an outer end point of the bead protection glue is Hpo = Hf 1.18+ theta, the coefficient theta is 30mm, an inner end point of the bead protection glue is positioned above the horizontal edge of the top of the steel traveler, the distance between the inner end point and the horizontal edge of the top of the steel traveler is Hpi = Hb iota, and the coefficient iota is 1; the sidewall lower endpoint height, Hsd = Hf 1.18- κ, coefficient κ of 80 mm; the lower end point of the molding compound is arranged above the horizontal edge of the top of the steel wire ring, and the distance coefficient lambda between the lower end point of the molding compound and the horizontal edge of the top of the steel wire ring is 20 mm. The outer side of the tire at the height of Hf 1.18 is vertically distant from the center of the turnup carcass, Lg = Lrl μ, Lrl is the vertical distance between the outer side of the tire at the height of Hf 1.18 and the center of the main carcass, and the coefficient μ is 0.5; the outer side of the tire at the height of Hf 1.18 0.75 is vertically distant from the center of the turnup carcass, Lu = Lrld v, Lrld is the vertical distance between the outer side of the tire at the height of Hf 1.18 0.75 and the center of the main carcass, and the coefficient v is 0.3; the bead durability of the 27.00R49 giant radial tire was 197 h.
Example 6
As shown in FIG. 2, a 27.00R49 giant radial tire was made and mounted on a 19.5/4.0 inch standard rim as follows. The tire comprises a tire crown, a tire side, a tire body (a main tire body and a reversely wrapped tire body), an inner liner (an airtight layer and a transition layer), a belt ply, a tire bead and other components, wherein the tire bead structure comprises a steel wire ring, an upper triangular rubber, a lower triangular rubber, a bead mouth protecting rubber, a steel wire bead mouth wrapping cloth, a nylon bead mouth wrapping cloth, the main tire body, the reversely wrapped tire body, a molding rubber, the tire side, the airtight layer and the transition layer. The tyre body cord fabric of the tyre is reversely wrapped by the steel wire ring, the reverse wrapping height Hc = Ht + alpha, Ht is the radius of the widest point of the section of the tyre, and the coefficient alpha is 0 mm; the steel wire bead wrapping cloth is 1 layer, the difference level is 25mm, the outer side of the steel wire bead wrapping cloth is positioned between the reversely wrapped tire body cord cloth, the molding compound and the bead protecting compound, the outer end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the outer end point and the horizontal edge of the top of the steel wire ring is Hwo = Hb beta, the height of the Hb tire bead is 0.35, the inner side of the steel wire bead wrapping cloth is positioned between the tire body cord cloth and the nylon bead wrapping cloth, the inner end point is positioned above the horizontal edge of the top of the steel wire ring, the distance between the inner end point and the horizontal edge of the top of the steel wire ring is Hwi = Hb gamma, and the coefficient gamma is 1.3; the nylon bead wrapping cloth is 2 layers, the difference level is 25mm, the upper end point of the nylon bead wrapping cloth is positioned above the horizontal edge of the top of the steel wire ring, the distance between the upper end point and the horizontal edge of the top of the steel wire ring is Hno = Hwi + delta, the coefficient delta is 60mm, the lower end point of the nylon bead wrapping cloth is positioned between the intersection point of the horizontal edge of the bottom of the steel wire ring and the nylon bead wrapping cloth and the right lower part of the center of the steel wire ring, the length from the horizontal edge of the bottom of the steel wire ring to the bottom of the steel wire ring is Lnd = Bw/2 epsilon, and the coefficient epsilon is 0.5; the lower end point of the upper triangular glue is positioned above the horizontal edge of the top of the bead ring, and the distance coefficient zeta between the lower end point of the upper triangular glue and the horizontal edge of the top of the bead ring is 20 mm; the height of an end point on the lower triangular glue is Hau = Hf 1.18+ eta, Hf is the height of a wheel rim, and the coefficient eta is 30 mm; the height of an outer end point of the bead protection glue is Hpo = Hf 1.18+ theta, the coefficient theta is 30mm, an inner end point of the bead protection glue is positioned above the horizontal edge of the top of the steel traveler, the distance between the inner end point and the horizontal edge of the top of the steel traveler is Hpi = Hb iota, and the coefficient iota is 1; the sidewall lower endpoint height, Hsd = Hf 1.18- κ, coefficient κ of 80 mm; the lower end point of the molding compound is arranged above the horizontal edge of the top of the steel wire ring, and the distance coefficient lambda between the lower end point of the molding compound and the horizontal edge of the top of the steel wire ring is 20 mm. The outer side of the tire at the height of Hf 1.18 is vertically distant from the center of the turnup carcass, Lg = Lrl μ, Lrl is the vertical distance between the outer side of the tire at the height of Hf 1.18 and the center of the main carcass, and the coefficient μ is 0.85; the outer side of the tire at the height of Hf 1.18 0.75 is vertically distant from the center of the turnup carcass, Lu = Lrld v, Lrld is the vertical distance between the outer side of the tire at the height of Hf 1.18 0.75 and the center of the main carcass, and the coefficient v is 0.75; the 27.00R49 giant radial tire has a bead endurance of 235 h.
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (9)
1. A giant radial tire with improved tire bead durability comprises a tire crown, a tire side, an inner liner, a belt ply, a tire bead and a tire body, wherein the tire body comprises a main tire body and a turn-up tire body; the steel wire bead opening wrapping cloth is 1-2 layers, the difference level is 15-30 mm, the outer end point of the steel wire bead opening wrapping cloth is located on the top horizontal edge of the steel wire ring, the distance between the outer end point and the top horizontal edge of the steel wire ring is Hwo = Hb beta, Hb is the height of the tire bead, the coefficient beta is 0.2-0.6, the inner end point of the steel wire bead opening wrapping cloth is located on the top horizontal edge of the steel wire ring, the distance between the inner end point and the top horizontal edge of the steel wire ring is Hwi = Hb gamma, and the coefficient gamma is 1-2.5.
2. The giant radial tire with the improved bead endurance performance of claim 1, wherein the height Hc = Ht + α of the tire body cord reverse-wrapped bead ring, Ht is the radius of the widest point of the tire section, and the coefficient α is 0-100 mm.
3. The giant radial tire with the improved bead durability as claimed in claim 1, wherein the nylon bead filler is 2-6 layers, the difference is 15-30 mm, the upper end point of the nylon bead filler is located above the horizontal edge of the top of the bead ring, the distance from the upper end point of the nylon bead filler to the horizontal edge of the top of the bead ring is Hno = Hwi + δ, the coefficient δ is 30-100 mm, the lower end point of the nylon bead filler is located between the intersection point of the horizontal edge of the bottom of the bead ring and the nylon bead filler and the center of the bead ring, the length from the horizontal edge of the bottom of the bead ring is Lnd = Bw/2 ∈, Bw is the width of the bead ring, and the coefficient ε is 0-1.
4. The giant radial tire with improved bead durability as claimed in claim 1, wherein the lower apex of the upper bead filler is above the bead ring top horizontal edge, and the distance ζ between the lower apex of the upper bead filler and the bead ring top horizontal edge is 0-50 mm; and the height of an end point on the lower triangular glue is Hau = Hf 1.18+ eta, Hf is the height of the wheel rim, and the coefficient eta is-20-60 mm.
5. The giant radial tire with improved bead durability as claimed in claim 4, wherein the outer end point height of the bead filler is Hpo = Hf 1.18+ theta, the coefficient theta is-20-60 mm, the inner end point of the bead filler is located above the top horizontal edge of the bead, the distance from the top horizontal edge of the bead is Hpi = Hb iota, and the coefficient iota is 0.5-2.
6. The giant radial tire having improved bead endurance as claimed in claim 4, wherein the sidewall lower end point height Hsd = Hf 1.18-k, coefficient k is 0-120 mm.
7. The giant radial tire with improved bead durability as claimed in claim 4, wherein the lower end of the molding compound is above the top horizontal edge of the bead ring, and the distance λ between the lower end of the molding compound and the top horizontal edge of the bead ring is 0-30 mm.
8. The giant radial tire having improved bead endurance as claimed in claim 4, wherein the outer side of the tire at the height of Hf 1.18 is vertically distanced from the center of the turn-up carcass by Lg = Lrl μ, where Lrl is the vertical distance from the outer side of the tire at the height of Hf 1.18 to the center of the main carcass, and the coefficient μ is 0.6 to 0.8.
9. The giant radial tire having improved bead endurance as claimed in claim 4, wherein the outer side of the tire at the height of Hf 1.18 0.75 is perpendicular to the turn-up carcass center by Lu = Lrld v, Lrld is perpendicular to the main carcass center at the height of Hf 1.18 0.75, and the coefficient v is 0.3-0.7.
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| CN111845209A (en) * | 2020-06-02 | 2020-10-30 | 山东玲珑轮胎股份有限公司 | Tyre for vehicle |
| CN114851780A (en) * | 2022-06-02 | 2022-08-05 | 通力轮胎有限公司 | Mining tire and manufacturing method thereof |
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| JPH1024711A (en) * | 1996-07-10 | 1998-01-27 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire |
| KR100821550B1 (en) * | 2006-12-28 | 2008-04-15 | 금호타이어 주식회사 | The heavy-duty pneumatic radial tire improving the durability of the bead section |
| CN202163250U (en) * | 2010-12-01 | 2012-03-14 | 青岛光明轮胎有限公司 | Reinforcing structure for seam allowance of loading radial ply tire |
| CN202357805U (en) * | 2011-12-16 | 2012-08-01 | 双钱集团(重庆)轮胎有限公司 | All-steel radial tire stopping opening structure |
| CN203611659U (en) * | 2013-10-16 | 2014-05-28 | 双钱集团股份有限公司 | All-steel radial tire bead structure |
-
2019
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1024711A (en) * | 1996-07-10 | 1998-01-27 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire |
| KR100821550B1 (en) * | 2006-12-28 | 2008-04-15 | 금호타이어 주식회사 | The heavy-duty pneumatic radial tire improving the durability of the bead section |
| CN202163250U (en) * | 2010-12-01 | 2012-03-14 | 青岛光明轮胎有限公司 | Reinforcing structure for seam allowance of loading radial ply tire |
| CN202357805U (en) * | 2011-12-16 | 2012-08-01 | 双钱集团(重庆)轮胎有限公司 | All-steel radial tire stopping opening structure |
| CN203611659U (en) * | 2013-10-16 | 2014-05-28 | 双钱集团股份有限公司 | All-steel radial tire bead structure |
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