CN102381143A - Reinforcing structure for all-steel cross-country radial tire bead - Google Patents

Abstract

An all-steel cross-country radial tire spout reinforcement structure, comprising a steel traveler (7) and a composite filling rubber (2, 6), and a steel wire carcass is arranged outside the steel traveler (7) and the composite filling rubber (2, 6) The cord (5), the steel wire carcass cord (5) is provided with a slit nylon cloth (3A, 3B, 3C, 3D), and the end point of the steel wire carcass cord (5) is higher than the slit nylon cloth (3A, 3B, 3C, 3D) at the outer end point, there is a layer of wear-resistant glue (4) and sidewall rubber (1) outside the slit nylon cloth (3), and it is characterized in that: the slit nylon cloth (3) adopts At least two layers of nylon cords are formed by crossing, and the included angle between the nylon cords and the circumferential direction is between 30° and 90°.

Description

An all-steel cross-country radial tire spout reinforcement structure

technical field

The invention relates to tire slit reinforcement, which can be applied to all types of all-steel off-road radial tires, especially to adjustable-pressure tires designed for off-road hilly or desert roads.

technical background

The spigot part of the all-steel radial tire with ordinary structure is composed of steel ring, steel wire carcass cord, external or U-shaped steel wire spigot reinforcement layer and wear-resistant rubber. Damage to the slit part is easy to occur under certain conditions, which is mainly due to the following reasons: the rigidity of the carcass cord and the steel wire cloth is large, and when the deformation of the tire is relatively large, the end point of the carcass cord at the slit part and the end point of the slit cloth The stress concentration is obvious, and the strain at the end point is serious. When the tire is constantly rotating, this large strain causes huge heat to be generated at this part. The continuous accumulation of heat will eventually cause the rubber material to age and become brittle and cause cracks. When the crack increases with the strain Repeatedly and constantly expanding until the outside of the tire will cause the slit of the tire to burst and completely lose the performance of the tire. The greater the aforementioned strain, the shorter the service life and poorer the performance of the tire.

At present, increasing the service life of the spigot is mainly achieved by increasing the strength of the bead. For example, Chinese patent 00207683.7 adopts a U-shaped steel wire cloth reinforcement layer, Chinese patent 02234433.0 adds a layer of nylon cloth reinforcement layer outside the steel wire cloth, and Chinese patent 200820149422.5 Adding sealing glue to the outer end of the reinforcement layer, etc., the above-mentioned scheme has a certain effect on solving the strength of the slit part, but for the low air pressure problem of off-road radial tires, not only the slit must have sufficient strength, but also must have certain toughness, Thereby reducing the early damage of the spigot part of the cross-country radial tire.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings in the prior art, and provide a reinforcement structure for the rim of an all-steel off-road radial tire, which will enable the rim of the tire to have sufficient strength and good toughness , the structure is suitable for off-road radial tires, which can be used for pressure regulation in non-road conditions.

The purpose of the present invention is achieved by the following technical solutions

The all-steel off-road radial tire spout reinforcement structure of the present invention includes a bead ring and a compound bead filler, a steel wire carcass cord is arranged outside the bead ring and the compound filler rubber, and a bead nylon wrapping cloth is arranged outside the carcass cord , each layer of nylon cloth is equidifferentially distributed, and there is a layer of mouth wear-resistant glue outside the mouth nylon cloth.

The all-steel cross-country radial tire has a reinforced structure at the notch part, and the overall thickness of the notch nylon wrapping cloth is too uniform, and the thickness difference between the thickest point and the thinnest point is 2-5mm.

The reinforcing structure of the slit part adopts the bonding method of equal width and staggered bonding, and the adjacent layers are distributed in a cross manner, and the angle α between the cord angle of each layer and the circumferential direction is between 30° and 90°.

The reinforced structure of the slit part, the slit nylon wrapping cloth adopts a U-shaped structure wrapping the steel traveler, and the highest point of the outer end is 10-50mm lower than the highest point of the inner side.

The beneficial effects of the present invention are as follows: (1) the neutron mouth nylon wrapping cloth of the present invention adopts two adjacent layers to be cross-arranged to form a mesh structure at the mouth of the tire, which will ensure sufficient strength at the mouth of the tire; (2) due to Multi-layer slit nylon wrapping cloth is used, and the distribution between each layer is equal, so that the thickness of the slit part is excessively uniform, and the thickness difference between the thickest part and the thinnest part is 2 ~ 5mm, and the stress transition of the slit part is more accurate when the tire is in use. Uniform, reducing the stress concentration of the slit; (3) The slit nylon wrap adopts the form of a U-shaped wrapping steel traveler, which is high on the inside and low on the outside, which effectively strengthens the internal strength of the slit and makes the strength distribution of the slit even , Reduce the early damage of the spigot part when the tire is low in pressure.

Description of drawings

Fig. 1 is a cross-sectional view of an all-steel off-road radial tire with a spigot reinforcement structure of the present invention.

FIG. 2 is a partially enlarged view of the selected area in FIG. 1 .

Figure 3 shows the lamination method and differential method of the slit nylon cloth.

Detailed ways

As shown in the figure, the reinforced structure of the all-steel cross-country radial tire of the present invention includes a steel traveler (7), a composite filling rubber (2, 6), and a steel traveler (7) and a composite filling rubber (2, 6) There is a steel wire carcass cord (5) on the outside, and the steel wire carcass cord (5) is provided with a slit nylon wrapping cloth (3A, 3B, 3C, 3D) on the outside, and the end point of the steel wire carcass cord (5) is higher than the slit Nylon cloth (3A, 3B, 3C, 3D) at the outer end point, there is a layer of mouth wear-resistant rubber (4) and sidewall rubber (1) outside the mouth nylon cloth (3), it is characterized in that: mouth nylon The wrapper (3) is formed by crossing at least two layers of nylon cords, and the included angle α between the nylon cords and the circumferential direction is between 30° and 90°.

The reinforced structure of the spout of the all-steel off-road radial tire is characterized in that the overall thickness of the spout nylon cloth (3) is excessively uniform, and the thickness difference between the thickest point and the thinnest point is 2-5 mm.

The reinforced structure of the all-steel cross-country radial tire is characterized in that: the nylon cloth (3A, 3B, 3C, 3D) adopts the same width and staggered pasting method, and the outer inner and outer equal difference can be used. The forming method (the example figure is in the form of outside and outside equal difference).

The reinforced structure of the all-steel cross-country radial tire spout is characterized in that: the spout nylon cloth (3) adopts a U-shaped structure wrapping the traveler (7), and the highest point of the outer end is lower than the highest point of the inner side by 10~ 50mm.

In the present invention, the slit nylon cloth 3 is cut into a certain angle and width after being calendered by a fiber cord calender, and then laminated on the molding machine in the manner shown in Figure 3. The difference G between the layers is the same, and the width of each layer is the same. L is the same. After laminating all the tire parts on the molding machine, the tire blank is molded, and the all-steel off-road radial tire with the structure of the present invention is made after being vulcanized by a vulcanizing machine.

Claims (4)

1. position, all steel cross-country radial-ply tyre rim of the mouth additional strengthening comprises bead coil (7), composite filled glue (2,6), at bead coil (7) and composite filled glue (2; 6) the outer steel wire carcass cord (5) that is provided with, outer rim of the mouth nylon infantees (3A, the 3B of being provided with of steel wire carcass cord (5); 3C, 3D), steel wire carcass cord (5) anti-package end points is higher than rim of the mouth nylon infantees (3A; 3B, 3C, 3D) outer end points; Wear-resisting glue in one deck rim of the mouth (4) and sidewall rubber (1) are arranged outside rim of the mouth nylon infantees (3), it is characterized in that: rim of the mouth nylon infantees (3) adopts at least 2 layers of nylon cord to intersect to form, and nylon cord and circumferential angle are between 30 to 90 °.

2. position, all steel according to claim 1 cross-country radial-ply tyre rim of the mouth additional strengthening is characterized in that: rim of the mouth nylon infantees (3) present position integral thickness is excessively even, and thickest point differs 2～5mm with the thinnest dot thickness.

3. position, all steel according to claim 1 cross-country radial-ply tyre rim of the mouth additional strengthening; It is characterized in that: nylon infantees (3A, 3B, 3C; 3D) adopt wide wrong subsides and mode of pasting, can adopt the molding mode (the instance figure is an equal difference form outside the outside) of interior equal difference in the outside and outer equal difference.

4. position, all steel according to claim 1 cross-country radial-ply tyre rim of the mouth additional strengthening is characterized in that: rim of the mouth nylon infantees (3) adopts the U type structure of wrapped wire circle (7), and its outer end highest point is lower than uppermost 10～50mm.

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