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Tyre comprising working layers formed by individual wires

A technology for working tire canopy and tires, applied in heavy tires, tire parts, reinforcement layers of pneumatic tires, etc., can solve the problems of reducing tire quality and cost, and achieve the effect of light weight and low manufacturing cost

Active Publication Date: 2018-02-27
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, it is possible to reduce the quality and cost of said tires, despite the need to compensate for the lack of reinforcing elements through the use of polymeric materials, compared to tires comprising layers of circumferential reinforcing elements distributed at a constant pitch

Method used

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  • Tyre comprising working layers formed by individual wires
  • Tyre comprising working layers formed by individual wires
  • Tyre comprising working layers formed by individual wires

Examples

Experimental program
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Embodiment Construction

[0131] To simplify understanding, the figures are not drawn to scale. The figures represent only a half-view of a tyre, which extends symmetrically with respect to an axis XX' representing its circumferential median plane or equatorial plane.

[0132] In the figure, tire 1-41 of size 385 / 55R 22.5 has an aspect ratio H / S equal to 0.55, H being the height of tire 1-41 on its mounted rim and S being the maximum axial width. Said tire 1-41 comprises radial carcass reinforcements 2-42 anchored in two beads (not shown in the figures). The carcass reinforcement 2-42 is formed from a single layer of metal cords. They further include treads 5–45.

[0133] exist figure 1 , according to the invention, the carcass reinforcement 2 is hooped by a crown reinforcement 4 formed radially from the inside to the outside by:

[0134] - a first working layer 41 formed by wires oriented at an angle equal to -18°,

[0135] - a second working layer 42 formed by wires oriented at an angle equal to...

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Abstract

The invention relates to a tyre comprising a crown ply formed by at least three working crown layers, at least two rubber blend layers Ci being disposed between the ends of the layers. According to the invention, in a meridian plane, the thickness of the working crown layers, measured in the equatorial plane, is less than 5 mm; the reinforcing elements of these layers are individual metal wires having a diameter of less than 0.50 mm; the distance between the reinforcing elements is strictly less than 1 mm; the axial width of each of the working crown layers is greater than 60% of the axial width of the tread; at least a distance di between two working layers separated by a rubber blend layer Ci, measured at the end of the axially narrowest working layer on contact, is such that 0.5 < di <2.5 mm; and the thickness of at least one rubber blend layer Ci is substantially constant across the axial width between the axially inner end of a rubber blend layer Ci and the end of the axially narrowest working layer on contact.

Description

technical field [0001] The present invention relates to tires with radial carcass reinforcement, and more particularly to tires intended to be mounted to vehicles carrying heavy loads, such as trucks, tractors, trailers or coaches. Background technique [0002] Usually, in tires for heavy goods vehicles, the carcass reinforcement is anchored on each side in the bead area and is radially covered by a crown reinforcement consisting of at least two superimposed layers Formed by parallel threads or cords in each layer, which cross from one layer to another and form an angle with the circumferential direction of between 10° and 45°. Said working layer forming the working reinforcement may further be covered by at least one layer called protective layer formed by reinforcing elements, advantageously metallic and stretchable and called elastic reinforcing elements . It may also comprise a layer of low-stretch metal threads or cords forming an angle of between 45° and 90° with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/18B60C9/20
CPCB60C9/1835B60C9/185B60C9/2006B60C2009/1842B60C9/20B60C2009/2016B60C2009/2019B60C2009/2038B60C2009/2064B60C2009/2077B60C2200/06
Inventor C·纳瓦罗-洛萨达J-F·帕尔芒V·马丁A·拉德简
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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