Tires comprising working layers formed from separate 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: 2019-08-30
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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  • Tires comprising working layers formed from separate wires
  • Tires comprising working layers formed from separate wires
  • Tires comprising working layers formed from separate wires

Examples

Experimental program
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Embodiment Construction

[0131] To simplify understanding, the drawings are not drawn to scale. The drawings only show a half view of the tire, which extends symmetrically with respect to the axis XX', which represents the circumferential median plane or equatorial plane of the tire.

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

[0133] in figure 1 According to the present invention, the carcass reinforcement 2 is hooped by the crown reinforcement 4, which is formed from the inside to the outside in the radial direction as follows:

[0134] -A first working layer 41 formed of metal wires oriented at an angle equal to -18°,

[0135] -A second working layer...

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Abstract

The invention relates to a tire comprising a crown ply formed from at least three working crown layers, at least two layers of rubber blend being arranged between the ends of said layers Ci. According to the invention, in the 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 wires with a diameter of less than 0.50 mm; the distance between the reinforcing elements is strictly less than 1 mm; the working The axial width of each of the crown layers is greater than 60% of the axial width of the tread; the end of the axially narrowest working layer in contact with it between the two working layers separated by the rubber blend layer Ci part of at least one distance d i meet 0.5 <di<2.5mm; and at least one rubber blend layer Ci has a thickness substantially constant.< / d

Description

Technical field [0001] The present invention relates to tires with radial carcass reinforcements, and more specifically to tires intended to be mounted to vehicles carrying heavy loads, such as trucks, tractors, trailers or buses. Background technique [0002] Generally, in the tires of heavy cargo vehicles, the carcass reinforcement is anchored in the bead area on each side and is radially covered by a crown reinforcement composed of at least two superimposed layers, the at least two superimposed layers It is formed by parallel threads or cords in each layer that cross from one layer to the other and form an angle between 10° and 45° with the circumferential direction. The working layer forming the working reinforcement may be further covered by at least one layer called a protective layer, said layer being formed by reinforcing elements, which are advantageously metallic and stretchable and are called elastic reinforcing elements . It may also include a layer of metal wires o...

Claims

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Application Information

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Patent Type & Authority Patents(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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