Tyre with radial ply reinforcement

A technology of reinforcement and reinforcement elements, applied in tire parts, reinforcement layers of pneumatic tires, wheels, etc., can solve problems such as fatigue failure of auxiliary ply cables

Inactive Publication Date: 2004-06-02
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the problems concerning the splitting between the working plies and the fatigue resistance of the carcass reinforcement cables seem to have been resolved, if the operating temperature is greatly reduced, regardless of the aspect ratio of the tire, on the other hand, regardless of the so-called The presence or absence of triangular plies, such a structure and a tire with a shape ratio of up to 0.60, on long journeys without directional movement lead to the occurrence of fatigue failures of the cables of the auxiliary ply, especially those at the edges of said ply

Method used

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  • Tyre with radial ply reinforcement
  • Tyre with radial ply reinforcement
  • Tyre with radial ply reinforcement

Examples

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Embodiment Construction

[0016] A tire P of size 385 / 55.R.22.5X has an H / S shape ratio of 0.55, H being the height of the tire P on its mounted rim and S its maximum axial width. Said tire P comprises a radial carcass reinforcement 1 anchored in each bead to at least one bead wire forming an inverted portion and formed by a single ply of metal cables. The carcass reinforcement 1 is surrounded by a crown reinforcement 3 formed radially from the inside to the outside by:

[0017] - a first working crown ply 32 formed by steel inextensible metal cables oriented at an angle α, in the case shown equal to 18°;

[0018] - an auxiliary ply 33 mounted on the first working crown ply 32, formed of inextensible steel metal elements oriented at 90° relative to the circumferential direction, the first working crown ply The axially outer edge of the ply is separated from the auxiliary ply 33 of the radial element by a profiled part 4 of substantially triangular cross-section, between the ply 32 and the ply 33 measu...

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Abstract

The invention concerns a tyre with radial casing (1), a breaker ply reinforcement (3) comprising at least two working breaker plies (32, 34) made of inextensible elements crisscrossed from one ply to the other, while forming with the circumferential direction angles ranging between 10 DEG and 45 DEG , and an axially continuous additional ply (33) made of inextensible and substantially radial continuous metal steel reinforcing elements, said ply being radially placed between the working plies (32, 34), and having an axial width L33 not less than 1.1 times the axial width L32, L34 of the wider working breaker ply (32, 34).

Description

technical field [0001] The invention relates to a tire having a radial carcass reinforcement anchored to at least one bead wire in each bead and comprising a crown reinforcement consisting of Consisting of at least two so-called working plies, which are superimposed and made of wires or cables that run parallel to each other in each ply and are crossed from one ply to the other , forms an angle of at most 45° in absolute value with the circumferential direction of the tire. Background technique [0002] French patent application FR 2,728,510 relates to such a tire, more particularly to a "heavy vehicle" type tire having a ratio of height H above the rim to maximum axial width S of 0.60. In order to increase the service life of the crown reinforcement of such tires and the regularity of its tread wear, said application proposes a structure of the crown reinforcement, characterized in that in said reinforcement there is jointly a non-extensible cable Axially continuous ply a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/18B60C9/20B60C9/28
CPCB60C9/2009B60C9/2006B60C9/28Y10T152/10792Y10T152/10801B60C9/20
Inventor 居伊·克吕泽尔
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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