RU17307U1 - TIRE OF A PNEUMATIC TIRE - Google Patents

Description

Pneumatic tire tire.

The utility model relates to the field of automobile tires, in particular, to the design of the side zone of the carcass of truck radial tires.

Known radial truck tires containing a carcass of 4-6 layers of rubberized textile cord with rubber layers, a belt, tread, sidewalls, side tapes, side rings (Technical Documentation No. 84-80D for the industrial production of truck tires with quality 1985. Radial tires It is registered in the library of FDI of the tire industry 12.11.80). The pedad of these tires is their low working capacity, as well as increased material consumption of the carcass.

The prototype of the proposed technical solution is a truck tire 10.00 R20 (Technical documentation No. 28-85D for the industrial production of truck tires with a quality of 1990. Radial construction tires. Registered in the library of FDI of the tire industry on December 29, 1985). 10.00 R20 mod. Bel-25. This pneumatic tire tire with a landing diameter of 20 inches contains a tread, sidewalls, a breaker, a carcass of 5 layers of rubberized cord, a bead, wing tapes. The first, second, third and fourth layers of the frame are made of cord of the first grade 25KPTS, and the fifth of the cord of the second grade 252KPTS. In the tire bead are two side wings, consisting of rings with filler cords. In this case, the first and second layers of the frame are wrapped on the first wing, the third and

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the fourth layer of the frame is wrapped on the second wing, and the fifth layer of the frame is wrapped under the wing.

The disadvantage of the prototype is the increased material consumption of the tire carcass and the increased complexity and energy consumption of its manufacture.

The technical result of the proposed solution is to reduce the weight of the reinforcing tire, its material in the bead area while maintaining the overall performance of the tire, reducing the complexity and energy consumption of tire manufacturing.

To achieve a technical result, in a tire of a pneumatic tire with a landing diameter of 20 inches, it contains a tread, sidewalls, belt, frame of 5 layers of rubberized cord, a board, wing tapes, according to a utility model, a board is made with one wing, the frame is made of two groups the outer and inner layers of the rubberized cord with a breaking load of the warp yarn is not more than 35 kgf / thread, and the number of carcass layers not wrapped around the wing is no more than 2, and two layers of the outer group are made of the second brand of cord.

The proposed technical solution provides a reduction in material consumption due to the more efficient use of structural materials in the airborne zone, while a single airborne wing is used in the tire bead, and the fourth and fifth layers of the carcass are made of the second grade of cord, whose density is less than the density of the other layers of the carcass. This solution allows you to reduce the energy consumption and the complexity of tire production.

Sush; the technical solution is illustrated by drawings. In FIG. 1 shows a meridional section of a tire of a pneumatic tire; FIG. 2 is a breakout I of FIG. 1. The tire cover contains: tread 1, sidewall 2, side 3 with side wing 4, belt

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5, carcass 6, rubberized cord layers 7 wrapped around the side wings 4 in the outer direction (on the wing), rubberized cord layers 8 wrapped around the side wing 4 in the inner direction (under the wing), side ribbon 9, wing ribbon 10.

Thus, the frame 6 is made of two groups of the outer 7 and the inner 8 layers of rubberized cord with a breaking load of the warp yarn of not more than 35 kgf / thread, and the number of layers of the carcass not wrapped around the wing is no more than 2, and two layers of the outer group are made of second brand of cord.

With a larger number of layers of the carcass of the cord of the second brand and the layers of the cord not wrapped around the wing, the side zone does not have a sufficient margin of safety, which leads to a decrease in tire performance.

With fewer carcass layers of the second cord mark and cord layers not wrapped around the wing, there is an increase in the mass of the carcass reinforcing material in the side zone of the tire pneumatic tire, as well as a decrease in the overall tire performance.

According to the invention, experimental tires of size 10.00 R20 were manufactured at BShK 2 Belshina. These tires contain one side wing in the side. Frame of five layers of rubberized cord. The first three layers of the frame are made of cord of the first grade 25KPTS with tensile strength of 25 kG / thread. The fourth and fifth layers are made of cord of the second (rarefied) grade 252KPTS with tensile strength of 25 kG / thread. The first three layers of the frame are wrapped on the wing, and the fourth and fifth layers are wrapped under the wing.

The test results of the experimental batch of tires showed their reliable performance, while the weight of the carcass is less than that of

prototype, a general performance remained at the level of the prototype.

Table 1 shows the comparative characteristics of tires of pneumatic tires 10.00 R20 - prototype and made in accordance with the proposed technical solution. Comparative characteristics of pneumatic tire tires №№ Indicators Prototype Offered

1. The number of groups of layers of the frame, 32

2. The number of groups of layers of the cord frame,

wrapped out

(on the wing), pcs. 21

3. The number of layer groups of the frame cord,

wrapped inward

(under the wing), pcs. 11

4. The number of wings in the tire bead, pcs. 21

5. The number of layers of the frame, pcs. 55

6. The width of the layers of the frame, mm:

1870880

2830840

3890810

4840700

5750725 7. Number of carcass layers, edge

which is located above the heel

Table 1

10.00R20.

W # Indicators Prototype Offered

8.Cord type:

the first (dense) brand of cord 25KPTS (1-4sl) 25KPTS (1-Zsl) the second (rarefied) brand of cord 252KPTS (5sl) 252KPTS (4-5sl)

9. The number of layers of the frame, pcs.

first (dense) brand of cord43

second (rarefied) mark of cord 12

10. Tire weight, calculated, kg 55,4350,63

11. Technological complexity

the manufacture of tire tires,% 10095

12. Energy costs for

tire tire manufacturing,% 10094

13. General tire performance

(mileage) when running on machines, km30003175

The implementation of the proposed technical solution will reduce the consumption of materials by 8-9%, reduce the technological complexity of their production by 4-6%, energy costs for the manufacture of tires by 5-7% without reducing the quality of the manufactured tires.

Claims (1)

Pneumatic tire tire with a landing diameter of 20 inches, comprising a tread, sidewalls, a belt, a carcass of 5 layers of rubberized cord, a bead, wing tapes, characterized in that the bead is made with one wing, the carcass is made of two groups, the outer and the inner, layers of rubberized cords with a breaking load of the warp yarn of not more than 35 kG / thread, the number of carcass layers not wrapped around the wing is not more than 2, and two layers of the outer group are made of the second cord mark.