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Reinforced tyre for heavy goods vehicle

A tire and reinforcing layer technology, applied to the reinforcing layer of pneumatic tires, wheels, tire parts, etc., can solve problems such as cracking, metal reinforcing elements reduce the ultimate tensile strength, etc., to reduce impact effects, avoid excessive bending, The effect of reducing the circumferential length

Active Publication Date: 2011-04-13
OCIETE DE TECH MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This fatigue wear of the metal reinforcing elements reduces their ultimate tensile strength and can lead to rupture when the tire is reinflated to its nominal pressure, especially immediately following repairs

Method used

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  • Reinforced tyre for heavy goods vehicle
  • Reinforced tyre for heavy goods vehicle
  • Reinforced tyre for heavy goods vehicle

Examples

Experimental program
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Effect test

Embodiment Construction

[0039] exist figure 2 A tire 10 of size 315 / 80R 22.5 shown in a meridian cross-section of , ie in a plane containing the axis of rotation of the tyre, comprises sidewalls 1 on each side of the crown 3 , each sidewall 1 terminating in a In the bead 4 in contact with the mounting rim (not depicted in this figure). The tire is reinforced with a carcass reinforcement 2 which itself is formed by a plurality of reinforcing elements 21 arranged in a circumferential direction (perpendicular to figure 2 The direction of the plane) is oriented at an angle of 90°. The reinforcing elements 21 of the carcass reinforcement have a concentration of 19 cords with a diameter of 0.18 mm without tapes wrapped around said reinforcing elements. The carcass reinforcement extends into the crown 3 and is covered radially on the outside with a crown reinforcement 31 on top;

[0040] For a tire of this size, the volume of the internal chamber containing the inflation pressure is 140 liters.

[004...

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Abstract

Tyre (10) comprising a radial carcass reinforcement (2) anchored in beads, the tyre (10) comprising two sidewalls (1), each sidewall (1) extending between a bead (4) and a crown (3), the two sidewalls comprising a first additional reinforcement (6) positioned either between the carcass reinforcement and the internal cavity of the tyre or axially on the outside of the carcass reinforcement, and atleast one of the sidewalls comprising a second additional reinforcing reinforcement (5), this tyre being characterized in that the first additional reinforcement comprises a plurality of reinforcing elements of a textile nature directed at an angle of at least 80 degrees and at most 90 degrees with respect to the circumferential direction, and in that the second additional reinforcement (5) comprises, in the circumferential direction and alternating, a plurality of first parts (51) and of second parts (52), these second parts (52) having a mean width at least equal to 20 mm, these first and second parts having rupture strengths, that is to say rupture forces per unit width of reinforcement, which are such that the rupture strength of the second parts (52) is lower than the rupture strength of the first parts, and in that the first and second additional reinforcements are positioned on either side of the carcass reinforcement.

Description

technical field [0001] The present invention relates to tires having metal carcass reinforcements, and more particularly to the means of reinforcing tires in the sidewalls of said tires. Background technique [0002] In the usual way, tires for use on heavy goods vehicles comprise a carcass reinforcement formed by at least one layer of metallic reinforcing elements wrapped in rubber material, which reinforcement has the additional function of resisting the inflation pressure inside the tyre. This carcass reinforcement is anchored at its ends in beads intended to come into contact with the seat on which the rim is mounted. The carcass reinforcement can be anchored notably by winding it on circumferential bead reinforcing elements such as bead wires. A carcass reinforcement is said to be radial in this document when the reinforcing elements in it form an average angle with the circumferential direction of greater than 75 degrees. [0003] Furthermore, the tire comprises a si...

Claims

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Application Information

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IPC IPC(8): B60C9/08
CPCB60C9/08B60C9/09Y10T152/10864
Inventor V·埃斯特恩M·科涅
Owner OCIETE DE TECH MICHELIN
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