CN204550897U - Full-steel radial ply engineering tyre all-steel cord - Google Patents

Abstract

The utility model discloses a steel wire cord for an all-steel radial engineering tire, which is formed by weaving and twisting seven strands. The middle monofilament is 1, the inner monofilament is 6, uniformly twisted on the middle monofilament to form a core wire, and the outer layer monofilament is 12, uniformly braided and twisted on the core wire, so The strands, inner monofilaments and outer monofilaments are twisted in the same direction. The contact between the monofilaments is line contact, which greatly increases the breaking force of the steel cord, improves the fatigue resistance and load-bearing performance of the steel cord, makes the tire better adaptable to the harsh road conditions, and improves the tire performance. service life.

Description

Steel cords for all-steel radial OTR tires

technical field

The utility model relates to a steel cord, in particular to a steel cord for an all-steel radial engineering tire.

Background technique

In the prior art, all-steel radial engineering tires use steel cords 7*(3+9+15*0.245)+0.245HT, and the whole strand of steel cords consists of 7 strands of 3+9+15*0.245 steel cords , the strands need to be produced in three steps, and the lay lengths are: 6.3, 12.5, and 18mm respectively. The disadvantages are that the steel cord processing steps are complicated, the efficiency is low, the breaking force is small, and the whole strand is 7*(3+9+15* 0.245)+0.245HT The breaking force is 22300N, the diameter is 4.84mm, and the whole strand of steel cord is alternately twisted left and right, so that there is point contact between the monofilaments, resulting in a decrease in the fatigue performance of the steel cord and affecting the use of the tire life.

Utility model content

In order to overcome the deficiencies of the prior art, the purpose of this utility model is to provide a steel cord for all-steel radial engineering tires, the contact between the monofilaments is line contact, which greatly improves the breaking force of the steel cord and improves the The fatigue resistance and load-bearing performance of the steel cord make the tire better adaptable to harsh road conditions and prolong the service life of the tire.

In order to solve the above problems, the technical scheme adopted in the utility model is as follows:

The steel cord for all-steel radial engineering tires is composed of 7 strands twisted and twisted. The strands are twisted from the middle monofilament, inner monofilament and outer monofilament. There are 6 monofilaments in the inner layer, which are uniformly twisted and twisted to form a core wire on the middle monofilament, and 12 monofilaments in the outer layer are uniformly twisted and twisted on the core wire. The yarn and the outer monofilament are twisted in the same direction.

Preferably, one of the 7 strands is used as a core strand, and the other 6 strands are evenly braided and twisted on the core strand.

Preferably, the middle monofilament, the inner monofilament and the outer monofilament are steel monofilaments with a carbon content of 0.90-0.92%.

Preferably, the twist direction of the strands, the monofilaments in the inner layer and the monofilaments in the outer layer is Z twist.

Preferably, the lay lengths of the monofilaments in the inner layer and the monofilaments in the outer layer are the same, and the lay lengths of the monofilaments in the inner layer and the strands are different.

Preferably, the lay length of the monofilament in the inner layer and the monofilament in the outer layer is 15-20 mm, and the lay length of the strands is 50-60 mm.

Preferably, the diameter of the middle monofilament is 0.33mm, and the diameters of the inner monofilament and the outer monofilament are both 0.30mm.

Compared with the prior art, the beneficial effect of the utility model is that: in the utility model, the steel cord for the all-steel radial engineering vehicle tire is formed by intertwining 19 monofilaments in each strand, and the core strand diameter of each strand is 0.33mm, the diameter of the middle layer and the outer monofilament is 0.30mm, when forming the whole steel cord, it is composed of 7 strands, and the raw steel with 0.90-0.90% carbon content is used, on the one hand, the breaking force is improved, and on the other hand On the one hand, the winding distance of each of the 7 strands is 15-20mm, and each strand of steel cord is formed at one time. The winding distance of the entire strand of steel cord is 50-60mm, and the diameter is 4.32mm. All are twisted in the same direction, which improves the fatigue performance of the steel cord and improves the service life of the all-steel radial engineering tire. Due to the high strength and small diameter of the steel cord, the steel cord and the The amount of rubber used meets the breaking force required for the steel cord used in all-steel radial engineering tires while reducing the manufacturing cost of the tire. It has high production efficiency, increased unit output, and reduces the production cost of the steel cord. The durability and load capacity of the tires have reached a high level.

Description of drawings

Fig. 1 is a schematic cross-sectional view of a steel cord for an all-steel radial engineering tire in the utility model;

Wherein, 1 is a strand, 101 is a middle monofilament, 102 is an inner monofilament, and 103 is an outer monofilament.

Detailed ways

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

As shown in Figure 1, the steel cord for all-steel radial engineering tires is formed by twisting seven strands 1, and the strand 1 is twisted by the middle monofilament 101, the inner monofilament 102 and the outer monofilament 103. The middle monofilament 101 is 1, the inner monofilament 102 is 6, uniformly twisted on the middle monofilament 101 to form a core wire, and the outer layer monofilament 103 is 12, uniformly braided and twisted on the core wire, the strands Thread 1, inner layer monofilament 102 and outer layer monofilament 103 are twisted in the same direction.

Example 1

The steel cord for all-steel radial engineering tires is made of 7 strands 1 twisted, 7 strands 1 take 1 strand 1 as the core strand, and the remaining 6 strands are evenly twisted on the core strand; the strand 1 is formed by the middle The monofilament 101, the inner layer monofilament 102 and the outer layer monofilament 103 are braided and twisted, the middle monofilament 101 is 1, the inner layer monofilament 102 is 6, and the core wire is formed by uniform knitting and twisting on the middle monofilament 101, There are 12 outer layer monofilaments 103, which are evenly braided and twisted on the core wire. Silk 103 is the steel wire monofilament that carbon content is 0.90%; Strand 1, inner layer monofilament 102 and outer layer monofilament 103 twist direction all are Z twist; Inner layer monofilament 102 and outer layer monofilament 103 twist lengths are 15mm, strand 1 twist length is 50mm; the diameter of the middle monofilament 101 is 0.33mm, and the diameters of the inner monofilament 102 and the outer monofilament 103 are 0.30mm.

Example 2

Steel cords for all-steel radial engineering tires are made of 7 strands 1 twisted, 7 strands 1 with 1 strand and 1 wire as the core strand, and the remaining 6 strands are evenly twisted on the core strand; the strand 1 is formed by the middle The monofilament 101, the inner layer monofilament 102 and the outer layer monofilament 103 are braided and twisted, the middle monofilament 101 is 1, the inner layer monofilament 102 is 6, and the core wire is formed by uniform knitting and twisting on the middle monofilament 101, There are 12 outer layer monofilaments 103, which are evenly braided and twisted on the core wire, and the strands 1, inner layer monofilaments 102 and outer layer monofilaments 103 are twisted in the same direction; Silk 103 is the steel wire monofilament that carbon content is 0.92%; Strand 1, inner layer monofilament 102 and outer layer monofilament 103 twist direction all are Z twist; Inner layer monofilament 102 and outer layer monofilament 103 twist lengths are 18mm, strand 1 twist length is 55mm; the diameter of the middle monofilament 101 is 0.33mm, and the diameters of the inner monofilament 102 and the outer monofilament 103 are 0.30mm.

Example 3

The steel cord for all-steel radial engineering tires is made of 7 strands 1 twisted, 7 strands 1 take 1 strand 1 as the core strand, and the remaining 6 strands are evenly twisted on the core strand; the strand 1 is formed by the middle The monofilament 101, the inner layer monofilament 102 and the outer layer monofilament 103 are braided and twisted, the middle monofilament 101 is 1, the inner layer monofilament 102 is 6, and the core wire is formed by uniform knitting and twisting on the middle monofilament 101, There are 12 outer layer monofilaments 103, which are evenly braided and twisted on the core wire. Silk 103 is the steel wire monofilament that carbon content is 0.92%; Strand 1, inner layer monofilament 102 and outer layer monofilament 103 twist direction all are Z twist; Inner layer monofilament 102 and outer layer monofilament 103 twist lengths are 20mm, strand 1 twist length is 60mm; the diameter of the middle monofilament 101 is 0.33mm, and the diameters of the inner monofilament 102 and the outer monofilament 103 are 0.30mm.

After testing, the breaking force of the steel cords for all-steel radial OTR tires produced in Examples 1-3 all reached above 25000N.

For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and ideas described above, and all these changes and deformations should fall within the protection scope of the claims of the present utility model.

Claims (6)

1. full-steel radial ply engineering tyre all-steel cord, it is characterized in that, compile sth. made by twisting by 7 strands (1) to form, described strand (1) is by middle monofilament (101), internal layer monofilament (102) and outer monofilament (103) are compiled sth. made by twisting and are formed, described middle monofilament (101) is 1, described internal layer monofilament (102) is 6, even volume is twisted with the fingers and form heart yearn on middle monofilament (101), described outer monofilament (103) is 12, even volume is twisted with the fingers on heart yearn, described strand (1), internal layer monofilament (102) is twisted with the fingers to identical with outer monofilament (103).

2. full-steel radial ply engineering tyre all-steel cord as claimed in claim 1, is characterized in that, described 7 strands (1) for core stock with 1 strand (1), are evenly compiled for all the other 6 and twisted with the fingers on core stock.

3. full-steel radial ply engineering tyre all-steel cord as claimed in claim 1, is characterized in that, described strand (1), internal layer monofilament (102) and outer monofilament (103) are twisted with the fingers and twisted with the fingers to being Z.

4. full-steel radial ply engineering tyre all-steel cord as claimed in claim 1, it is characterized in that, described internal layer monofilament (102) is identical with outer monofilament (103) lay pitch, and internal layer monofilament (102) is different with strand (1) lay pitch.

5. full-steel radial ply engineering tyre all-steel cord as claimed in claim 4, it is characterized in that, described internal layer monofilament (102) and outer monofilament (103) lay pitch are 15-20mm, and described strand (1) lay pitch is 50-60mm.

6. the full-steel radial ply engineering tyre all-steel cord as described in any one of claim 1-5, it is characterized in that, described middle monofilament (101) diameter is 0.33mm, and described internal layer monofilament (102) and outer monofilament (103) diameter are 0.30mm.