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Tires with weight-reducing bead areas

A tire and bead technology, which is applied to tire parts, reinforcement layers of pneumatic tires, bead edges, etc., can solve problems such as complex design

Active Publication Date: 2020-12-08
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The presence of these reinforcing element layers or reinforcements complicates the design of these bead areas of the tire

Method used

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  • Tires with weight-reducing bead areas
  • Tires with weight-reducing bead areas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0072] figure 1 Only a half view of a tire is shown which extends symmetrically with respect to the circumferential mid-plane or equatorial plane of the tire.

[0073] exist figure 1 In , the size of tire 1 is 12R 22.5, and its aspect ratio H / L is equal to 0.90. Said tire 1 comprises a radial carcass reinforcement 2 anchored in two beads 3 . The carcass reinforcement 2 is wrapped at the crown of the tire by a crown reinforcement 5 , which is itself covered by a tread 6 .

[0074] A carcass reinforcement 2 formed of a single layer of metal cords is wound around a bead wire 4 in each bead 3 and forms a turn-up 7 of a carcass reinforcement layer in each bead 3, the carcass reinforcement The bead 7 of the layer has an end 8 .

[0075] The carcass reinforcement 2 is composed of reinforcing elements between two calendered layers having a tensile modulus of elasticity at 10% elongation equal to 9.8 MPa.

[0076] The reinforcing elements of the carcass reinforcement 2 are cords 1...

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Abstract

The invention relates to a tyre (1) with a radial carcass reinforcement formed by a single ply of reinforcement elements (2), turned up around a bead wire (4) such as to be anchored in each of the beads (3). According to the invention, the turn-up (7) of the carcass reinforcement ply and the main part of the carcass reinforcement ply are coupled to one another and then uncoupled, and these are the only plies of reinforcement elements present in the sidewall with an elongation at rupture of less than 6 %. The arrangement and selection of the polymer blends in the region of the bead (3) of the tyre enhance the endurance performance.

Description

technical field [0001] The present invention relates to a tire with radial carcass reinforcement, and more particularly to a tire for equipping vehicles carrying heavy loads and traveling at sustained speeds, such as trucks, tractors, trailers or buses. Background technique [0002] In heavy-duty tyres, the carcass reinforcement is usually anchored on both sides in the bead area and is radially covered by a crown reinforcement consisting of at least Composed of two layers, said threads or cords are parallel in each layer and cross from one layer to the other, forming an angle with the circumferential direction of between 10° and 45°. Said working layer forming the working reinforcement may also be covered with at least one layer called protective layer, the reinforcing elements forming said protective layer being advantageously metallic and stretchable and called elastic reinforcing elements. It may also comprise a layer of metal threads or cords having low elongation and f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C15/06B60C9/02B60C15/00
CPCB60C15/06B60C15/0603B60C2009/0276B60C2015/009B60C2015/061B60C2015/0614B60C2015/0621
Inventor E·茹兰J-L·盖贝尔-朱贝尔
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN