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Crown reinforcement with shoulder ply

A technology of ply and reinforcement, applied in tire parts, reinforcement layers of pneumatic tires, tire edges, etc., can solve the problems of high cost and damage, and achieve the effect of improving the impact resistance of tire shoulders

Inactive Publication Date: 2008-01-02
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, this option of changing one property of this rubber is expensive on the one hand and compromises other equally desirable properties on the other hand

Method used

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  • Crown reinforcement with shoulder ply
  • Crown reinforcement with shoulder ply

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Experimental program
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Effect test

Embodiment Construction

[0041] To simplify understanding, the figures are not shown to scale.

[0042] Figure 1 depicts a tire P of size 315 / 80R 22.5 having a radial carcass reinforcement with a single ply 1 of inextensible metal cores, that is to say the cores are The maximum elongation is 0.2% at 10% of the breaking load; in the case shown it is 27 x 23 cores (27 cores of 23 / 100 mm). The carcass reinforcement is fixed to the bead wire 2 in each bead, forming an inversion 10, the radially outer side of which is in turn surrounded by a crown reinforcement 3 covered by a tread 4 .

[0043] The crown reinforcement radially from inside to outside has:

[0044] - two crown half-plies 30, forming a triangular ply and consisting of 9 x 28 metal cores (9 cores of 28 / 100) at an angle α 0 orientation, in the case shown the α 0 is equal to 65°,

[0045] - a first crown working ply 31 radially covering this ply 30, consisting of 11×35 metal cores (11 cores 35 / 100) forming an angle α equal to 26° with the c...

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Abstract

The invention relates to a tyre that is intended to be mounted on a vehicle supporting a heavy load, such as a truck, a civil engineering vehicle and / or an aircraft, said tyre comprising a carcass reinforcement whereon is radially mounted a crown reinforcement and a tyre tread. According to the invention, the crown reinforcement (3) comprises at least two plies (31, 32) of metallic reinforcing elements which are mutually parallel in each ply and criss-crossed from one ply to the next, forming an angle of between 10 and 35 DEG with the circumferential direction. Said crown reinforcement also comprises a ply (5) of reinforcing elements at least in each shoulder which are mutually parallel in the ply and which are oriented radially. Moreover, the axially inner edge (51) of said ply (5) is disposed such that it is radially adjacent to at least one edge of one of the plies (30, 31, 32, 33) of the crown reinforcement (3) while the axially outer edge (52) of said ply (5) is radially lower than the edge of the above-mentioned adjacent ply.

Description

technical field [0001] The invention relates to a tire for mounting on heavy-duty vehicles, such as trucks, construction vehicles and / or aircraft, having a carcass reinforcement radially surrounded by a crown reinforcement and a tread. Background technique [0002] Such tires are subjected to repeated stresses and deformations caused by the internal pressure of the tire carried by the working plies of the many reinforcements, in particular the crown reinforcement. These working plies usually have reinforcements, which are arranged parallel to each other in the same ply and arranged at an included angle with reinforcements in adjacent working plies. [0003] The function of the working ply is mainly to provide a certain stiffness to the tire. These known plies have at their ends vulnerable areas formed by the free ends of the reinforcing elements. [0004] It is known, in order to avoid contact between the ends of the core wires of the various plies, to place a thick rubber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/20B60C15/06B60C9/22
CPCB60C15/06B60C9/2009B60C9/2006Y10T152/10765Y10T152/10792Y10T152/10837Y10T152/10828Y10T152/10864B60C9/08
Inventor O·费兰
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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