Vehicle tires

Abstract

The invention relates to a vehicle tire (1) with a belt assembly (2) having at least two superimposed belt layers (3) having reinforcing elements (4) embedded in a belt rubber, parallel to each other, wherein the belt layers (3) have a radially inner working position (5) and a radially outer working position (6), wherein a carcass (7) with a carcass layer (8) having a reinforcing element is arranged radially within the belt assembly (2).

Description

[0001] The invention relates to a vehicle tire with a belt assembly comprising at least two superimposed belt layers having reinforcing elements embedded in a belt rubber, running parallel to each other, wherein the belt layers have a radially inner working position and a radially outer working position, wherein a carcass with a carcass layer comprising a reinforcing element is arranged radially within the belt assembly.

[0002] Vehicle tires of the described type are known. The belt plies of known vehicle tires change their contour during use, particularly during the running-in and running-out phases of the tire's contact patch. A relative movement occurs, especially in the radial direction. The radial ends of the belt plies, particularly in a working position, exhibit a particularly large change in contour. This results in high stresses in these areas of the vehicle tire, which can negatively affect the tire's durability and resistance.

[0003] Against this background, the invention is based on the objective of designing a vehicle tire in such a way that it is improved in terms of durability and wear.

[0004] This problem is solved with a vehicle tire according to the features of claim 1. The dependent claims relate to particularly advantageous further developments of the invention.

[0005] According to the invention, a vehicle tire, particularly a commercial vehicle tire, is provided with a belt assembly comprising at least two superimposed belt layers and reinforcing elements, in particular cords, embedded in a belt rubber layer and running parallel to each other. The belt layers have a radially inner working layer and a radially outer working layer, wherein a carcass with a carcass layer comprising reinforcing elements is arranged radially within the belt assembly, the carcass layer having two radially inwardly directed protrusions extending around the circumference of the tire. In a cross-section in the lateral and axial directions of the vehicle tire, the carcass layer has two inflection points in the region of each protrusion. The lateral distance between the two inflection points of a protrusion corresponds to the lateral extension of the protrusion.The protrusions extend laterally over lateral end regions of the inner working position and / or the outer working position and / or a 0° position, the cross-section being a cross-section of a remounted, in the sense of never having been mounted, and undamaged vehicle tire.

[0006] The two radially inward-facing protrusions extending around the tire's circumference are characterized by their location in the shoulder areas of the vehicle tire. Laterally, these protrusions are limited by the turning points of the carcass ply.

[0007] A preferred embodiment provides that the lateral protrusion has a length of at least 5 mm, preferably at least 8 mm, and more preferably at least 12 mm. It has been shown that a greater protrusion length results in a greater improvement in durability.

[0008] Another preferred embodiment provides that the protrusion has a radial extension of at least 5 mm, preferably at least 7 mm, more preferably at least 9 mm, and more preferably at least 12 mm. A greater radial extension of the protrusion has proven advantageous with regard to improving durability.

[0009] Another preferred embodiment provides that a tire component extending around the circumference of the tire, in particular a rubber-containing tire component, extends over a region of the lateral protrusion, wherein the lateral extension of the tire component corresponds to 0.5 to 3 times the lateral extension of the protrusion.

[0010] Another preferred embodiment provides that the tire component is a tire component independent of a shoulder pad.

[0011] Another preferred embodiment provides that the tire component has a rubber compound that differs from the surrounding rubber compound, wherein the rubber compound of the tire component, in particular, has a higher strength. It has been shown that a rubber compound that differs from the surrounding rubber compound is advantageous for improving durability, especially if it has a higher strength.

[0012] Another preferred embodiment provides that the belt assembly has at least three belt layers and preferably exactly three belt layers, and thus the radially inner working position, the radially outer working position and a 0° position.

[0013] The invention allows for numerous embodiments. To further illustrate its basic principle, one of these is shown in the drawings and described below. This shows in Fig. 1 a partial area of ​​a cross-section of a vehicle tire with a protrusion.

[0014] Fig. Figure 1 shows a vehicle tire 1 with a belt assembly 2 comprising at least two superimposed belt layers 3, the reinforcing elements 4 in the form of cords being embedded in a belt rubber layer and running parallel to each other. The belt layers 3 have a radially inner working layer 5 and a radially outer working layer 6. Radially within the belt assembly 2, a carcass 7 with a carcass layer 8 comprising reinforcing elements is arranged.

[0015] The carcass layer 8 has two radially inwardly directed protrusions 9 extending along the tire circumference U. In a cross-section in the lateral direction of the vehicle tire 1, the carcass layer 8 has two turning points 10, 11 in the area of ​​each protrusion 9, wherein the lateral distance of the two turning points 10, 11 of a protrusion 9 corresponds to the lateral extension of the protrusion.

[0016] The protrusions 9 extend laterally over the lateral end regions of the inner working position 5 and / or the outer working position 6 and / or a 0° position. The carcass 7 surrounds a bead core 12 and forms a carcass fold 13. Reference symbol list 1 vehicle tire 2 belt bandage 3 belt layer 4 reinforcing elements 5 internal working position 6 external working position 7 Carcass 8 carcass layers 9 Protrusion 10 Turning Point 11 Turning Point 12 bead core 13 Carcass wrap Tire circumference

Claims

[1] Vehicle tires (1), in particular commercial vehicle tires, comprising a belt assembly (2) having at least two superimposed belt layers (3) and reinforcing elements (4), in particular cords, embedded in a belt rubber, running parallel to each other. wherein the belt layers (3) have a radially inner working position (5) and a radially outer working position (6), wherein radially within the belt assembly (2) a carcass (7) with a carcass layer (8) having a reinforcing element is arranged, characterized by , that the carcass layer (8) has two radially inwardly directed protrusions (9) extending around the circumference of the tire, wherein the carcass layer (8) in a cross-section in the lateral direction of the vehicle tire (1) has two turning points (10, 11) in the area of ​​each protrusion (9), wherein the lateral distance of the two turning points (10, 11) of a protrusion (9) corresponds to the lateral protrusion extension, wherein the protrusions (9) extend laterally over lateral end regions of the inner working position (5) and / or the outer working position (6) and / or a 0° position, wherein the cross-section is a cross-section of a remounted and undamaged vehicle tire (1). [2] Vehicle tires (1) according to claim 1, characterized by that the lateral protrusion extent is at least 5 mm, preferably at least 8 mm, more preferably at least 12 mm. [3] Vehicle tires (1) according to claim 1, characterized bythat the protrusion (9) has a radial extent of at least 5 mm, preferably at least 7 mm, more preferably at least 9 mm and more preferably at least 12 mm. [4] Vehicle tires (1) according to any of the preceding claims, characterized by , that a tire component extending along the tire circumference (U), in particular a tire component comprising rubber, extends over a region of the lateral protrusion extension, wherein the lateral extension of the tire component corresponds to 0.5 times to 3 times the lateral extension of the protrusion (9). [5] Vehicle tires (1) according to claim 4, characterized by that the tire component has a rubber compound that differs from the surrounding rubber compound, wherein the rubber compound of the tire component in particular has a higher strength. [6] Vehicle tires (1) according to any of the preceding claims, characterized bythat the tire component is a tire component independent of a shoulder pad. [7] Vehicle tires (1) according to any of the preceding claims, characterized by , that the belt bandage (2) has at least three belt layers and preferably exactly three belt layers and thus the radial inner working position (5), the radial outer working position (6) and a 0° position.

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