DD157688A1 - VEHICLE AIR TIRES WITH IMPROVED GUERTONE CONSTRUCTION - Google Patents

Abstract

The invention relates to pneumatic vehicle tire with improved belt structure, which contains a barrier layer, and is applicable to light and heavy truck tires and transport tires, regardless of the strength carrier (reinforcement) of the carcass. Without an excess consumption of material, early rollovers of the tires should be avoided as much as possible by the invention due to the inability to support the belt by creating favorable composite body properties. The invention relates to the barrier layer, which represents an orthotropic layer and contains a reinforcement of organic cords or glass cord or organic or inorganic monofilaments and is characterized by perimeter diameter, Elastmatrix and geometry.

Description

The invention relates to pneumatic vehicle tires with improved 'belt structure containing a barrier layer' and is in light and heavy truck tires and transport tires _? regardless of the reinforcement (reinforcement) of the carcass applicable *

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Belt and carcass are heterogeneous tire composite structural elements made of an elastomeric matrix, and reinforcement (strength support) ₉ in which the strength member is substantially the. To absorb static and dynamic forces _e : Yerbundaufbauelemente possess nonlinear. _? viscoelastic: anisotropic properties «

Belts, and carcasses can be seen as multi-layer or multi-layer bundles «. A small belt or carcass (as a flat bandage considered -thickness small compared to other geometrischen.Abmessungen) _s is made, individual unidirectional. Layers or layers _P in which the. Direction of the reinforcements in the different layers based on an axis equal to (carcass. Of tires in Radia1-type) 'or may be different (carcass ₉ breaker in bias tires _s belt in radial tires) «· Within a:

individual .Schichtelementes run .: Reinforcements usually parallel and straight to each other »Under special conditions, the. heterogeneous layer with viscoelastic and anisotropic properties by a linear elastic, homogeneous, ortho tropes; Material model explain »The properties of the layer element (as well as the multilayer composite element) depend on the geometric structure of the layer element as well as; The viscoelastic properties of matrix, and .Armierung,. For more heavily loaded radial tires, such as Z ₀ B, truck tires, several belt cords made of steel cord are applied to the carcass. In the equatorial plane, the first belt layer is provided as a blocked layer with a thread angle of 55 ° -75%, preferably 65 ° j. The belt structure of the known tire designs differs in the other technical parameters such as steel cord construction., Thread density, 'belt layers, gradation; the layers, layer count as well as geometric. Arrangement of the layers *

In the known belt constructions, the first belt layer has the. Task to increase the lateral stiffness and thus favorably influence the lateral force behavior of the: tire and the Poisson adaptation between the acute-angled. This first belt layer can be formed due to the fulfillment of the above tasks only as a non-load-bearing layer or "layer with respect to the absorption of circumferential forces." It is not capable of tensile stresses, the. z "B", from: Centrifugal stress or internal load result, absorb ",.

The theory for calculating belt stiffness neglects this situation. , A disadvantage of this first belt layer, the limited penetration (penetration) of the elastmatrix in the steel cord, which entails air and moisture inclusions and promotes corrosion, '

Furthermore, the unattended S.tahlkoräendf laugh due to the low adhesion there between reinforcement and elast matrix poor adhesion and separations on the belt · "edge with the associated early failure of the tire, can occur«

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The aim of the invention is the development of a GürtelkonstruktioBj reduced-without an increase in consumption of material, the above-mentioned disadvantages and thus weitest- premature failure of the tire due to .Unzulänglichkeiten in the belt range: continuously avoids _e.

The object of the invention is to provide opportunities for the construction of a barrier layer with favorable Verbundkörpereigensohaften »

According to the invention this object is achieved by a barrier layer, which represents an orthotropic layer: _s . which contains a reinforcement of organic cords or glass cord or organic or inorganic monofilaments _? which is characterized by the Umlcreisäurchmesser a ₅ . Furthermore, an elastmatrix with a Sohubmoäul Gvr _{9 has} the between

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G _n = O ₅ 8 and 1.6 - -? lies _? as well as in geometry a shape

^Ά ' mm · ..'factor'k- from 1 _$ 4 to 1.9 has _f where the form factor

out ·, '

ti) c '/ M. °

Surrender-t,

where ^ is the thread density jj, d _{Q is} the circumference diameter of the reinforcement rmmj and h is the. Layer thickness: jmmj represent »

The invention will be explained in more detail below using an exemplary embodiment.

According to the invention, the barrier layer is characterized as: orthotropic layer by the reinforcement of: organic cords or of glass cord or "of organic or inorganic monofilaments and of an elastic matrix" _:

There is the characteristic of reinforcement in perimeter.

diameter d ♦ (Young's modulus E_ in the axial direction

can be neglected as experimentella shows) "The elastic matrix has a shear modulus Gtt, which can vary between 0.8 and 1.6 - ^ -, ¹¹ mm

The geometry is determined by the form factor k ^, which must obey the following condition:; ^:

(f

ff "the thread dense ---- I. d "the circumference diameter

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the reinforcement £ mny and h the layer thickness; £ jnm7darstellen.

According to a concrete embodiment according to the invention set forth, the barrier layer in the case of a tire of the dimension 11.00 E 20 can be constructed of the strength carrier viscose cord 184 tex 1x3 super 2: with 85 threads / 10 cm and a layer thickness of 1.25 mm.

The angle size is 63 ° * -The width of the barrier layer

O _S 9 is the width of the second layer arranged above it, y being the steel belt in a known manner, and also the other belt layers *. · ... .. ', * _v It's out of it. possible, the barrier layer; in compliance with: divided conditions shown: with widths of 0 _s 3. the second layer to be arranged, whereby the distance, between both TeilperrlagenÄbenfalls is 0.3 *. The invention in no way extends to the "illustrated concrete embodiment * but is generally to be carried out, that in any case, by the use according to the invention of the said fasteners, compared to the hitherto customary use of steel cord in the locked position : a 'more economical solution was found' which, in addition, leads to a substantial increase in the usefulness of tires. *

Claims (1)

 A pneumatic vehicle tire having an improved belt structure containing a barrier layer, characterized in that an element, the barrier layer, is an orthotropic layer. a reinforcement of organic cords or glass cord or organic or inorganic monofilaments containing dia is characterized by the perimeter diameter d, furthermore an elastmatrix with. a shear modulus G ^ lying between Gtt = 0.8 and i, 6 - ^, and, in geometry,. , , ·. mm. , ... , , has a form factor k _f : of: 1 ^ 4 to 1.9, where the form factor is. gives, where ff _{a is} the thread density] --- /, d _{o is} the perimeter diameter of the L "S / lliliL I G-. Reinforcement / mm ") and h to divide the layer thickness fmmjdars.