DE2847926A1 - VEHICLE TIRES - Google Patents

Description

2847826

Continental Gummi-Werke AG, Hanover Pneumatic vehicle tires

The invention relates to a pneumatic vehicle tire with a belt, the edges of which are enclosed by tapes consisting of thread-like reinforcing elements.

It is known in radial tires with a coarse tread pattern to cover the belt edges with additional stiffening layers. These band-shaped stiffening layers exist from threads running in the circumferential direction of the tire, which consist of a heat-shrinking material, including polyamides, polyester and polyvinyl alcohol can be used. These stiffening layers have the task of unevenness in the tire surface and Avoid structural changes in the tire if the tire surface is embossed or depressed due to its coarse tread.

Mese 7ereteifun £ sJ & gen have however ir. Reif-jr.uir.l'-r.gEri-rr.tur.jT Mr ^: ib «-> r '.'ir.e limited elastic deformability; =. ·; /: Er j err. We hindered the necessary * - Durchrr.esserär.derur 3 on the belt rsri during production. Also f. Τ. finished, vulcanized. More mature, we i'i by the strong ur.terscniedlichf Verfornmi- ^ sverr.-ilte :. des G ^ r ^ elrandevS eir.erf ^: --itH ur. Eier belt middle on the other hand or.s Führ- and h'cri ebvern-i _t * er. of the tire is affected.

030020/0230 _{BATHROOM 0RK3INAL}

2847928

The invention is based on the object of eliminating this deficiency. Thus, a tire is to be created which, during its manufacture, advantageously still has small increases in diameter in the area of its belt section allows. A radial tire, in which the belt edges are also secured, is still aimed for however, at the same time, elastic deformability in the tire zone can be achieved to a greater extent without fear must that signs of detachment occur in the area of the belt edges.

To solve this problem, according to the invention, the strips located on the belt edges consist of tensile threads or the like running approximately at right angles to one another in the manner of a full fabric, but the thread-like reinforcement elements of one inclined direction and those of the other inclined direction with the tire circumferential direction at an angle of about JO to 60, but preferably form angles of k $.

These reinforcement inserts can be formed by two superimposed cord fabric layers with a corresponding thread course. Preferably, however, a full fabric, in particular a lattice-like structure made of thread-like reinforcing inserts, is used, in which the reinforcement inserts are firmly connected to each other at the crossing points, e.g. by welding.

030020 / U230

This lattice-like reinforcing element, which is solid in itself, can therefore a relatively large elastic deformation, because the thread-like reinforcing inserts under the aforementioned comparatively large Angles run to the tire circumferential direction. It can then be a Occurrence diamond shift, as it is known and possible in diamond associations in tire construction. This deformability enables it also, the individual stripes in the tire assembly or in the To deform winding on the green tire in the desired manner, around the strip then fed up on such documents of the green tire to be able to hang up, which largely depends on the cylindrical shape differ.

Further details of the invention are explained with reference to the drawing. Show it:

1 shows a radial partial section through a pneumatic vehicle tire,

Fig. 2 is a partial plan view of the between Tread and carcass of the tire according to FIG. 1 located reinforcement of the tire body and

Fig. 3 is a partial view of the representation

according to FIG. 2 in an enlarged diagrammatic representation.

030020/0230

The tire body made of rubber or gourami-like materials is reinforced by a radial carcass 1, the edges of which are anchored in the tire beads 5 by looping around the bead cores 2.

Between the tread h and the carcass 1 there is a belt 5, which extends essentially over the width of the tread, made of parallel, guffied, tensile threads, preferably steel cables, which are arranged in two superimposed layers 6, in such a way that the steel cables 8 of the two layers 6, 7 cross each other and, in a symmetrical arrangement, enclose an angle a of approximately 18 to 25 with the tire circumferential direction.

The edges of this belt 5 are surrounded by bands 9 like a bandage, which are shown in dashed lines in FIG. These bands 9 have a width of about 1/8 to 1/5 of the width of the Belt 5; their laterally outer edge 10 is located at half the distance A between the two edges 11, 12 of the two layers 6, 7-

The bands 9, which are made in one layer according to the embodiment, consist of each other at an angle of practically 90 crossing tensile threads 13, e.g. made of artificial silk. These threads 1_5 However, they are not arranged in the manner of a full fabric with a crimp, i.e. to a large extent in the area of the intersection points displaceable, but essentially at the intersection points 1 ^

030020/0230

non-displaceably connected to one another, which can be achieved by mutual penetration of the threads 13, but optionally also by welding. The threads 13 each rise below approximately h3 towards the tire circumferential direction.

Accordingly, the steel cables 8 run at a much smaller angle to the tire circumferential direction than the threads 13 - In addition, these are not laid in two layers one above the other, but practically in one plane or one layer, so that a sufficiently elastic elongation of the bands 9 once in the circumferential direction, on the other hand, it can also occur in the case of local deformations, in that the angles between mutually crossing threads 13 change in the manner of Nuremberg scissors. These bands exert a favorable influence on the edge zones of the belt. They calm the freely running edges, prevent peeling phenomena and still allow sufficient elastic deformations. In this respect, the belts 9, which are predominantly made of rayon or a similarly soft material, form a transition between the comparatively rigid belt edges and the rubber layers of the tread edge sections that are favorable in terms of strength and dynamics.

This deformability is also in the tire production of To use. It allows diameter changes during tire manufacture the tire zenite area, for example, when the still unvulcanized Green tire with a certain increase in diameter on the outside Perimeter is to be profiled so molded.

030020/0230

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Claims (2)

Expectations: .yVehicle pneumatic tires with a belt located between the tread and the carcass, extending essentially over the width of the tread, with tensile strength in the circumferential direction, effecting the lateral stabilization of the tire, the edges of which are surrounded by bands consisting of thread-like reinforcing inserts, characterized in that the reinforcing inserts (threads 13) the belts (9) in the manner of a full fabric enclose angles of approximately 90 with one another, but with the tire circumferential direction angles of approximately ~ *> 0 to 60, preferably however angles of ^ 5. 2. Tire according to claim 1, characterized in that the reinforcing inserts (13) form single-layer tapes (9) and ^{are connected to one another immovably at their intersection points (1 1} O, for example by mutual penetration or welding. 3 · Tire according to claim 1, characterized in that in one two-layer belt (5), stepped at its edges, on the side the outer edge (1O) of the strips (9) ends at about half the length, which is determined by the edge distance (A) between the two edges (11, 12) is determined on a belt edge. H. Tire according to Claim 1, characterized in that the width of the belts (9) corresponds approximately to 1/5 to Ι / δ of the belt width. 030020/0230 ORIGINAL INSPECTED 5- tire according to claim 1, characterized in that the reinforcing inserts (13) ribbons (9) made of textiles, e.g. rayon consist, while the belt layers in a known manner from steel cables (8) or reinforcements similarly high tensile strength and bending stiffness exist. Hanover, September 28, 1978 D / Fr 78-W P / D 030020/0230