CN201158277Y - Oblique giant engineering tire - Google Patents

Abstract

The utility model relates to a bias giant engineering tyre, which comprises buffer layers and a carcass ply made of band. The carcass ply comprises a carcass ply inner layer, a carcass ply central layer and a carcass ply outer layer, wherein the carcass ply central layer comprises a turn-down carcass ply outer layer and a carcass ply outer layer of a turn-up steel wire rope, and at least one layer in the buffer layers is made from aramid-material cord and taken as an enhanced buffer layer. Furthermore, the band of at least one layer in the turn-down carcass ply outer layer is an enhanced layer of aramid cord. The bias giant engineering tyre has the advantages that the penetrating resistance, the anti-cutting performance and the service life of the tyre tread of the tyre are improved to a large extent, and compared with the tyre of the cord of the cord fabric adopting nylon material as the buffer layer, the safety driving mileage of the tyre can be improved by more than 30 percent.

Description

A kind of oblique giant-scale engineering tyre

(1) technical field:

The utility model relates to a kind of tire, particularly a kind of oblique giant-scale engineering tyre.

(2) background technology:

The cushion layer and the casingply of existing oblique giant-scale engineering machinery tire generally all adopt Dipped Nylon Tyre Cord Fabric (hereinafter to be referred as nylon) to make framework material, as application number be: 96104413.6, name is called the Chinese invention patent of " radially Medium Truck tire ", a kind of radially Medium Truck tire is disclosed, it has tire band or the cushion layer of strengthening cord or fiber yarn reinforcement with organic matter, majority in described tire band or the cushion layer is strengthened with steel wire or cord, other tire band or cushion layer then use the fiber yarn or the cord that are made of organic polymer to be strengthened, wherein top tire belt or cushion layer are strengthened with a kind of organic polymer fiber silk or cord, and described organic fiber silk or cord are to be made of the nylon monofilament that is used in carcass and/or the cushion layer carcass plies.But because the nylon cord brute force is low, heat dispersion is relatively poor, and the required cushion layer number of plies of the tire that rim diameter is big is too many, add that tire is at mine operation, when particularly on iron ore, copper mine, using, because operating condition is extremely harsh, and load carrying ability is big, production time is long, cause the tire in use easy stabbing bundle of carcass, cutting, very easily producing tire stabs in early days, punctures and scrap, therefore to make the tyre crown rigidity of cushion layer low for nylon, and carcass strength is low, thereby has influence on the safe application performance and the service life of tire.

(3) utility model content:

The utility model will disclose a kind of long service life, anti-puncture, the extremely strong oblique giant-scale engineering tyre of anti-cutting power.

The utility model oblique giant-scale engineering tyre, comprise cushion layer, the casingply of making by bandage, described casingply comprises carcass cord internal layer, carcass cord middle level, carcass cord skin, carcass cord skin comprises the carcass cord skin of the outer and anti-package bead coil of the carcass cord that just wrapping, existing oblique off-the-road tyre cushion layer and casingply all adopt the same elastic modulus material, the general nylon cord that adopts, unlike the prior art be, the cord that has one deck in the cushion layer of the present invention at least is an aramid fiber, i.e. cushion layer of Jia Qianging makes the modulus of elasticity of the cord that has one deck in the cushion layer at least greater than the modulus of elasticity of the bandage cord material of carcass cord middle level and carcass cord internal layer like this; Certainly, cushion layer also can be the cushion layer of the modulus of elasticity of cord greater than the reinforcement of the modulus of elasticity of the bandage cord of carcass cord middle level and carcass cord internal layer, and promptly cushion layer is the cushion layer that cord is the reinforcement of aramid fiber material.The cushion layer of described reinforcement preferably is arranged at the radially outermost end of carcass.0.76～0.8mm is generally selected in the line footpath of described aramid fiber for use; The cord density of the cushion layer bandage of described reinforcement is generally 70～90/10cm.Cushion layer cord of the present invention has adopted the material of modulus of elasticity greater than nylon, makes it possess higher intensity, hardness, and stronger shock resistance, tear-resistant, cutting property, has correspondingly also increased the rigidity and the carcass strength of tyre crown.In general, for mining rim diameter 35 " more than the oblique off-the-road tyre, its carcass cushion layer is 2～4 layers, when the cord of cushion layer uses the aramid fiber material; can be that wherein one deck uses the aramid fiber material; also can be more than one deck, or even all cushion layer all adopts the aramid fiber material, compare as cushion layer with adopting nylon material; under the identical situation of performance; can reduce the cushion layer number of plies, as not reducing the cushion layer number of plies, then greatly increase the service life of carcass.In addition, the cord material of this novel casingply can be identical with existing heterotropic giant tire, as select nylon cord for use.

In order further to improve anti-thorn, the cutting resistance energy of carcass, the cord that has 1 layer bandage in the carcass cord skin that is just wrapping of this novel tire at least is the modulus of elasticity enhancement Layer identical with the cord modulus of elasticity of the cushion layer of reinforcement of cord, and having 1 layer bandage at least in the promptly described carcass cord skin that is just wrapping is the enhancement Layer of aromatic polyamide cord; The number of plies of enhancement Layer can be determined according to actual needs, generally can be 2～4 layers, described enhancement Layer preferably is located at the outermost end of casingply, so that carcass possesses better anti-thorn, cutting resistance energy, certainly also can be, the described outer field bandage of carcass cord that is just wrapping is the enhancement Layer of aromatic polyamide cord.0.76～0.8mm is generally selected in the line footpath of described aramid fiber for use; The cord density of the bandage of described enhancement Layer is generally 70～90/10cm.And outer field bandage cord of the carcass cord of anti-package bead coil and carcass cord internal layer, carcass cord middle level cord can be the modulus of elasticity identical materials, as can be identical with existing heterotropic giant tire, select nylon cord for use.In general, mining rim diameter is 35 " more than the oblique off-the-road tyre; its casingply is 22～40 layers; when the outer field bandage cord material of its carcass cord that is just wrapping uses aramid fiber, and a carcass cord that only needs just to wrap uses the aramid fiber materials for outer field 2～4 layers, and adopts nylon material to make carcass cord skin to compare; under the identical situation of performance; can reduce the carcass number of plies, as not reducing the carcass number of plies, then greatly increase the service life of carcass.

Have at least the cord of one deck to use high strength, aramid fiber material that coefficient of strain is little in this novel tire cushion layer, improved to a great extent tyre crown and carcass intensity, reduced the rolling resistance of tire, make carcass to bear higher impact force and various pressure; Though the material hardness that cushion layer is selected for use is big, coefficient of strain is little, it can not cause adverse effect to bead coil and casingply yet after bearing bigger pressure and impulsive force; In addition,,, find that it is the cushion layer that cushion layer can replace two-layer at least employing nylon material that one deck adopts the aramid fiber material, can reduce the number of plies of cushion layer like this, saved productive costs according to applicant's test owing to the hardness of aramid fiber, the height of intensity ratio nylon.In addition, the crown part of this novel tire resists thorn, anti-cutting power, service life to be improved significantly, compares with the existing tire that adopts nylon material to make the cord of cushion layer cord, and the safety traffic mileage of tire can improve more than 30%.

(4) description of drawings:

Fig. 1 is the structural representation of 1 described novel oblique giant-scale engineering tyre of embodiment.

Accompanying drawing sign: 1, casingply; 2, the carcass cord skin that is just wrapping; 3, cushion layer.

(5) specific embodiment:

As shown in Figure 1, this novel oblique giant-scale engineering tyre, its rim diameter is 〉=35 "; it comprises 1～4 layer of cushion layer 3; 22～40 layers of casingply 1 of being made by bandage; described casingply 1 comprises 2～10 layers of carcass cord internal layer; 16～36 layers of carcass cord middle level; 2～10 layers of carcass cord skin, carcass cord skin comprises the carcass cord skin of 2～4 layers of outer 2 and 4～8 layers of anti-package steel coil of the carcass cord that is just wrapping, wherein, the cord of casingply 1 adopts nylon material, and described cushion layer 3 is the cushion layer that cord material adopts the reinforcement of aramid fiber material, and the aramid line that is adopted directly is 0.76-0.8mm; The cord density of the bandage of the cushion layer of described reinforcement is 70-90 root/10cm.

In another embodiment, this novel oblique giant-scale engineering tyre, its rim diameter is 〉=35 "; comprise 1～4 layer of cushion layer 3; 22～40 layers of casingply 1 of making by bandage; described casingply 1 comprises 2～10 layers of carcass cord internal layer; 16～36 layers of carcass cord middle level; 2～10 layers of carcass cord skin, carcass cord skin comprises the carcass cord skin of 2～4 layers of outer 2 and 4～8 layers of anti-package steel coil of the carcass cord that is just wrapping, carcass cord internal layer wherein, the outer field bandage cord of the carcass cord of carcass cord middle level and anti-package bead coil all adopts nylon material, and have 1～4 layer to be cord employing aramid fiber material in the described cushion layer 3, be the cushion layer of strengthening, the aramid line that is adopted directly is 0.76-0.8mm; The cord density of the bandage of the cushion layer of described reinforcement is 70-90 root/10cm, and 3 of other which floor cushion layers still adopt nylon material; In addition, the bandage that has 2～4 layers in the carcass cord skin 2 that is just wrapping is that cord material is the enhancement Layer of aramid fiber, and this enhancement Layer is located at the outermost end of casingply 1, and the aramid line that is adopted directly is 0.76-0.8mm; The cord density of the bandage of described enhancement Layer is 70-90 root/10cm.

Claims (8)

1, a kind of oblique giant-scale engineering tyre, the casingply (1) that comprises cushion layer (3), makes by bandage, described casingply (1) comprises carcass cord internal layer, carcass cord middle level, carcass cord skin, carcass cord skin comprises the carcass cord skin (2) that just wrapping and the carcass cord skin of anti-package bead coil, it is characterized in that: the cord that has one deck in the described cushion layer (3) at least is the aramid fiber material, is the cushion layer of strengthening.

2, oblique giant-scale engineering tyre according to claim 1 is characterized in that: described cushion layer (3) is the cushion layer that cord is the reinforcement of aramid fiber material.

3, oblique giant-scale engineering tyre according to claim 1 is characterized in that: the cushion layer of reinforcement is arranged at the outermost end of carcass.

4, according to any one described oblique giant-scale engineering tyre in the claim 1～3, it is characterized in that: the line of described aramid fiber directly is 0.76～0.8mm.

5, according to any one described oblique giant-scale engineering tyre in the claim 1～3, it is characterized in that: the cord density of the cushion layer cord of described reinforcement is 70～90/cm.

6, according to any one described oblique giant-scale engineering tyre in the claim 1～3, it is characterized in that: the cord material of described casingply (1) is a nylon material.

7, according to any one described oblique giant-scale engineering tyre in the claim 1～3, it is characterized in that: having 1 layer bandage at least in the described carcass cord skin (2) that is just wrapping is the enhancement Layer of aromatic polyamide cord.

8, oblique giant-scale engineering tyre according to claim 7 is characterized in that: described enhancement Layer is 2～4 layers.