Lightweight tyre

A technology for tires and carcass, which is applied to heavy tires, tire parts, tire edges, etc. It can solve the problems of changing tire performance and increasing production costs, achieving light crown and bead areas, reducing curing time, and low cost Effect

Active Publication Date: 2020-02-14
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is possible to vary the polymer compound in the crown and bead regions of the tire in order to change the time it takes to polymerize, but this risks changing the performance of the tire due to these components
Furthermore, there is a risk of increased production costs, especially since the compound has to be adjusted to size; this means that different polymer compounds have to be manufactured and stocked to produce tires of different sizes

Method used

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  • Lightweight tyre
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Examples

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Embodiment Construction

[0125] In order to make them easier to understand, the figures are not shown to scale.

[0126] figure 1 Only a half-view of a tire is shown, which extends symmetrically with respect to an axis XX' representing its circumferential mid-plane or equatorial plane.

[0127] figure 1 A tire 1 of size 12R 22.5 is shown. Said tire 1 comprises a radial carcass reinforcement 2 anchored in two beads. A carcass reinforcement 2 formed of a single layer of metal cords is wound around a bead wire 4 in each bead 3 and a turn-up 7 of the carcass reinforcement having an end 8 is formed in each bead 3 . The tire also has a tread 5 .

[0128] exist figure 1 , the carcass reinforcement 2 is hooped according to the invention by a crown reinforcement 6 formed radially from the inside to the outside by:

[0129] - a first working layer 61 formed by metal cords oriented at an angle equal to 16°,

[0130] - a second working layer 62 formed of metal cords oriented at an angle equal to 30° and cr...

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PUM

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Abstract

The invention concerns a heavy goods vehicle tyre, intended to be mounted on a hollow, 15-degree drop center rim. According to the invention, the two working crown layers alone constitute the crown reinforcement over at least 40% of the width of the tread, the absolute value of the difference between the absolute values of the angles [alpha]2 and [alpha]1 being greater than 4-degree, [alpha]2 being greater than [alpha]1 in absolute value, the mean angle [alpha] satisfying the relationship 14+131*exp(-L/100) < [alpha] < 20+164*exp(-L/100), and, in meridian cross-section of said tyre, the turnupof the carcass reinforcement layer and the main part of the carcass reinforcement layer are coupled and then uncoupled, and the turnup of the carcass reinforcement layer and the main part of the carcass reinforcement layer are the only layers of reinforcing elements of which the elongation at break is less than 6% present in the sidewall.

Description

technical field [0001] The present invention relates to tires with radial carcass reinforcement, and more particularly to tires intended to equip vehicles carrying heavy loads and traveling at sustained speeds, such as trucks, tractors, trailers, or coaches. Background technique [0002] In tires of the heavy-duty type, the carcass reinforcement is usually anchored on both sides in the bead area and is covered radially by a crown reinforcement consisting of at least two overlapping and made of threads or cords The resulting layers consist of said threads or cords being parallel in each layer and crossing from one layer to the next, 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 formed by reinforcing elements, advantageously metallic and stretchable and called elastic reinforcement element. It may also comprise a layer of wire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/20B60C15/06
CPCB60C9/2006B60C15/06B60C2015/009B60C2015/061B60C2015/0621B60C2200/06
Inventor E·茹兰O·富尼耶J-L·盖贝尔-朱贝尔
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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