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Tyre comprising a layer of circumferential reinforcement elements

A technology for reinforcing elements and reinforcements, which is applied to the reinforcement layers of pneumatic tires, special tires, heavy-duty tires, etc., can solve the problems of adverse effects on the durability of the crown reinforcements, increased driving distance, etc., and achieves simplified manufacturing and storage. The effect of low tire manufacturing costs

Active Publication Date: 2017-02-22
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of conditions in which such tires are driven undoubtedly results in increased distances traveled and reduced wear on the tires; on the other hand, the durability of the tires, especially the durability of the crown reinforcement, is adversely affected

Method used

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  • Tyre comprising a layer of circumferential reinforcement elements
  • Tyre comprising a layer of circumferential reinforcement elements
  • Tyre comprising a layer of circumferential reinforcement elements

Examples

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Embodiment Construction

[0170] For easier understanding, the drawings are not shown to scale. These figures show only half of the figure of the tire, which continues symmetrically with respect to the axis XX' representing the circumferential median or equatorial plane of the tire.

[0171] exist figure 1 where the tire 1 of size 315 / 70R 22.5 has an aspect ratio H / S equal to 0.70, where H is the height of the tire 1 on its mounted rim and S is its maximum axial width. Said tire 1 comprises radial carcass reinforcements 2 fixed in two beads (not shown in the figures). The carcass reinforcement is formed from a single layer of metal cords. Said carcass reinforcement 2 is hooped by a crown reinforcement 4 formed radially from the inside to the outside by:

[0172] - a first working layer 41 formed of unencapsulated inextensible 9.28 metal cords continuous over the entire width of the ply and oriented at an angle of 24°,

[0173] - a layer 42 of circumferential reinforcing elements formed from 21x23 s...

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Abstract

Tyre comprising a crown framework formed from at least two working crown layers having unequal axial widths, one layer C of a rubber mixture being disposed between at least the ends of said working layers, a second layer S of polymer mixture being in contact with at least one working layer and the carcass framework, and the crown framework comprising at least one layer of circumferential reinforcement elements radially arranged between two working layers. The distance between the end of the axially narrowest working layer and the working layer separated from same by layer C is such that 1.1 < d < 2.2 , being the diameter of the reinforcement elements of the circumferential layer; in a meridian plane, the thickness of layer C is essentially constant and the complex dynamic shear modulus G* of said second layer S, measured at 10% and 60 DEG on the return cycle, is greater than 1.35 MPa.

Description

technical field [0001] The present invention relates to tires with radial carcass reinforcements, in particular tires intended to be fitted to vehicles carrying heavy loads, such as vans, tractors, trailers or buses, travelling at sustained speeds. Background technique [0002] In tires of the heavy duty type, the carcass reinforcement is usually anchored on both sides in the bead region and is covered radially by a crown reinforcement consisting of at least two layers overlapping and consisting of Wires or cords are formed which are parallel in each layer and cross from one layer to the next, forming an angle between 10° and 45° with the circumferential direction. Said working layer forming the working reinforcement can be further 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 metal wires or cords with low extensibility f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C1/00B60C9/18
CPCB60C1/00B60C9/1835B60C2001/0066B60C2009/1828B60C2200/06B60C9/185B60C2009/1857B60C2009/1878B60C2001/0075
Inventor H·雷哈布J-F·帕尔芒捷
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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