CN202764614U

CN202764614U - Tire bead structure of engineering radial tire

Info

Publication number: CN202764614U
Application number: CN201220436922.3U
Authority: CN
Inventors: 梁金招; 刘亮亮
Original assignee: Triangle Tyre Co Ltd
Current assignee: Triangle Tyre Co Ltd
Priority date: 2012-08-30
Filing date: 2012-08-30
Publication date: 2013-03-06
Anticipated expiration: 2022-08-30

Abstract

The utility model relates to a tire bead structure of an engineering radial tire and belongs to the field of tires. The tire bead structure of the engineering radial tire comprises an engineering radial tire bead, a tire body steel wire, a steel wire ring, seam allowance rubber, a lower triangular rubber core and a tire bead heel waterproof line. The tire bead structure of the engineering radial tire is characterized in that a bead heel vertical height numerical value is increased by 2-5mm than that obtained through standard calculation, and a lower tire sidewall arc radius numerical value is increased by 35%-40% than that obtained through standard calculation. The tire bead structure of the engineering radial tire can effectively prevent quality problems of bead cracking, bead empty and the like due to overload or large deflection of actual use of the tire bead structure in a mine, leads early damage failure, prolongs service life of tires, can guarantee that the tire bead and a rim are appropriately matched in size, has enough fit pressure, guarantees air tightness of the tires, avoids relative sliding between the tire bead and the rim in usage, and cannot bring too much troubles in tire assembly and disassembly.

Description

The bead structure of engineering radial tire

Technical field

The utility model relates to the tire field, at length says it is a kind of bead structure of engineering radial tire.

Background technology

As everyone knows, novel, the advanced tire product that engineering radial tire uses as the mine engineering motor vehicles and machines, the handling characteristics of this class tire is the characteristics such as the tire oad is large, load-carrying ability large, the research and development difficulty is large, and the forming process difficulty is large.Engineering radial tire only has Michelin (Michelin), Bridgestone (Bridgestone), solid special (Goodyear) tire Big Three to monopolize technology and market, the situation of domestic project radial-ply tyre whole dependence on import in 2002 in the world.Higher engineering radial tire Design and manufacture level directly affects its service life, particularly as the tyre bead of main force part, the mine is actual use in because overload or the large problem of deflection and the normal circle that occurs splits, enclose the quality problems such as sky, cause earlier period damage to lose efficacy, have a strong impact on Using Life of Tyre and personal security.The problems such as breach for the appearance of engineering radial tire tyre bead, foreign project radial-ply tyre on the 16th giant Goodyear application October in 1993 US Patent (application number 153726) is by seeking to solve the tyre bead problem with the tyre heel arc radius 9 of production-release design greater than flange radius 7 unique design.As shown in Figure 2, the standard value of the tire of production-release design heel vertical dimension 10 is that flange height G deducts flange radius 7 and adding that then the magnitude of interference (2.5-4mm) that closes diameter 2 calculates.As shown in Figure 2 tyre bead and tight consistent cooperation of tangent curve of wheel rim, such design is feasible, for tyre air tightness in normal non-overloading situation, load and unload all better, but under the larger or overweight serious operating mode of deflection, easily contact interlock with wheel rim end points place near the tire heel water-

proof wire

12,1 place forms circumferential breach at the engineering radial tire tyre bead, along with time lapse, breach is deepened, even rubs tire heel position carcass steel wire, causes the extreme failure mode of the quick-fried grade of circle.

Summary of the invention

In order to overcome the deficiencies in the prior art, the utility model provides a kind of bead structure of engineering radial tire, prevent following problem: the mine is actual use in because overload or the large problem of deflection and the normal circle that occurs splits, enclose the quality problems such as sky, cause earlier period damage to lose efficacy, have a strong impact on Using Life of Tyre and personal security.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of bead structure of engineering radial tire, comprise engineering radial tire tyre bead, carcass steel wire, bead coil, bead adhesive, lower triangular rubber core and tire heel water-proof wire, it is characterized in that, the tire heel vertical dimension numerical value that the numeric ratio criterion calculation of tire heel vertical dimension obtains increases 2-5mm, and the numerical value of the lower sidewall arc radius that the numeric ratio criterion calculation of lower sidewall arc radius obtains increases 35%-40%.

The utility model also can be achieved by the following measures: the thickness B of lower triangular rubber core root accounts for the 68-72% of the gross thickness C of lower triangular rubber core root.

The thickness curve of tire heel water-proof wire virgin chewing-gum from tyre bead than the uniform rounding off in softer zone, territory, hard area to sidewall, gradually attenuate.

The beneficial effects of the utility model are, can effectively prevent the mine is actual use in because overload or the large problem of deflection and the normal circle that occurs splits, enclose the quality problems such as sky, cause earlier period damage to lose efficacy, improve the service life of tire, and the dimensional fits that can guarantee tire bead and wheel rim is suitable, existing enough driving fit pressure, the air-tightness of assurance tire, guarantee in use not produce between the two relatively to draw and move, can not make again in the tyre fixing operation and bring too large difficulty.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of the utility model background technology.

Among the figure 1, the engineering radial tire tyre bead; 2, and close diameter; 3, carcass; 4, bead coil; 5, bead adhesive; 6, lower triangular rubber core; 7, flange radius; 8, engineering tire standard rim; 9, tyre heel arc radius; 10, tire heel vertical dimension; 11, lower sidewall arc radius; 12, tire heel water-proof wire; 13, adhesive glue; 14, air-retaining liner; G. flange height; A. bead adhesive thickness; B. descend the thickness of triangular rubber core root; C. descend the gross thickness of triangular rubber core root.

The specific embodiment

In Fig. 1, the utility model comprises engineering radial tire tyre bead 1, carcass steel wire 3, bead coil 4, bead adhesive 5, lower triangular rubber core 6 and tire heel water-proof wire 12, the tire heel vertical dimension numerical value that the numeric ratio criterion calculation of tire heel vertical dimension 10 obtains increases 2-5mm, and the numerical value of the lower sidewall arc radius that the numeric ratio criterion calculation of lower sidewall arc radius 11 obtains increases 35%-40%.The utility model need not changing and closes diameter 2, can have in engineering tire standard rim 8 and the design of engineering radial tire tyre bead cooperation position the gap of 2-4mm.Tire heel vertical dimension 10 such as Fig. 1 18.00R33 scale engineering radial-ply tyre is increased to 32.2mm by standard value 28.6mm, and lower sidewall arc radius 11 is adjusted into 145mm by standard value 105mm.

Increase the thickness of lower triangular rubber core 6 roots, the gross thickness C(that the thickness B of lower triangular rubber core root accounts for lower triangular rubber core root comprises two-layer carcass 3, adhesive glue 13, air-retaining liner 14, bead adhesive 5) 68-72%.Improve glue kind hardness, the physical property hardness Shao Shi of glue kind reaches the 78-82 degree.The thickness of lower triangular rubber core 6 roots of 18.00R33 scale engineering radial-ply tyre is adjusted into 36mm by standard value 32mm as shown in Figure 1, the thickness B that reaches lower triangular rubber core root account for lower triangular rubber core root gross thickness C 69%, physical property hardness Shao Shi 75 degree of glue kind increase to 80 degree.

The thickness of tire heel water-proof wire 12 virgin's chewing-gums is from the engineering tire small dimension to large specifications design difference large (3-12mm), and principle of design is that the curve of bead adhesive thickness A should be from tyre bead than the uniform rounding off in softer zone, territory, hard area to sidewall, gradually attenuate.The thickness A of the tire of 18.00R33 scale engineering radial-ply tyre tire heel water-proof wire 12 vertical carcass steel wire virgin chewing-gums 5 is adjusted into 6mm by standard value 9mm as shown in Figure 1, and curve is with regard to the rounder and more smooth stress dispersion that is conducive to behind the attenuate.

Do not falling in the low intensive situation, carcass steel wire 3 employing calendering density are little, high, the large diameter structure of steel wire of individual wire intensity, (recommend the engineering radial tire product to use 7*7*0.22+0.15HT, 7*7*0.25+0.15HT carcass structure of steel wire, steel wire diameter is respectively 2.24mm, 2.52mm, calendering density 30--33 root/10cm).The body cord 3+9+15*0.22+0.15HT intensity 2700N of 18.00R33 scale engineering radial-ply tyre tire as shown in Figure 1, single diameter is 1.62mm, 55/10cm of calendering density is replaced by 7*7*0.22+0.15HT intensity 5120N, and single diameter is 2.24mm, 33/10cm of calendering density.

Following table 1 is that indoor lathe is used the structure design of the utility model tyre bead and the evaluation table of background technology tyre bead design durability contrast at engineering radial tire 18.00R33.Can find out that therefrom the utility model is improved significantly from the properties of product of tire bead outline curve and the optimization of tyre bead portion distribution of material, circle occur and split, enclose sky, enclose the Problem of Failure such as quick-fried.

Table 1:

Test condition:

1, load is by 65% standard load, continues to increase progressively according to 5%, and increasing to 140% load no longer increases; Speed is also increased progressively with 5% by 10km/h simultaneously, increases to be decremented to 10km/h after 30km/h no longer increases operation 24h, until tyre failure.

2, inflation pressure constant voltage 700kPa.

The engineering radial tire that the utility model tyre bead designs is tested in the actual entrucking in certain mine at home in addition, has moved 1900 hours, and tyre bead portion is intact; Background technical design tire moves more than 700 hour tyre bead and circumferential breach occurs under equal road conditions, vehicle, and thereupon time lapse is more and more darker until lost efficacy and damage.

Total the above, the design of the utility model engineering radial tire bead structure, effectively solve engineering radial tire under the abominable road conditions such as mine because the early stage circle that occurs of the engineering radial tire tyre bead that overload or deflection cause greatly splits, enclose the tyre bead quality problems such as sky, improved by a relatively large margin product life and the Combination property of engineering radial tire.

Claims

1. the bead structure of an engineering radial tire, comprise engineering radial tire tyre bead, carcass steel wire, bead coil, bead adhesive, lower triangular rubber core and tire heel water-proof wire, it is characterized in that: the tire heel vertical dimension numerical value that the numeric ratio criterion calculation of tire heel vertical dimension obtains increases 2-5mm, and the numerical value of the lower sidewall arc radius that the numeric ratio criterion calculation of lower sidewall arc radius obtains increases 35%-40%.

2. the bead structure of described engineering radial tire according to claim 1 is characterized in that the thickness B of said lower triangular rubber core root accounts for the 68-72% of the gross thickness C of lower triangular rubber core root.

3. the bead structure of described engineering radial tire according to claim 1, the thickness curve that it is characterized in that said tire heel water-proof wire virgin chewing-gum from tyre bead than the uniform rounding off in softer zone, territory, hard area to sidewall, gradually attenuate.