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Tyre bead for a large goods vehicle

A technology for tires and trucks, which is applied to tire beads and radial tires, and can solve problems such as tire degradation

Active Publication Date: 2012-11-28
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, these bending cycles introduce compressive and tensile loads into the polymer material of the filler profiled element, more particularly in the immediate vicinity of the free ends of the foldbacks and additional reinforcement reinforcing elements, which compressive and tensile loads The tensile loads create stresses and thermal deformations which, over time, are likely to degrade the tire, necessitating replacement

Method used

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  • Tyre bead for a large goods vehicle
  • Tyre bead for a large goods vehicle
  • Tyre bead for a large goods vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0064] figure 1 A bead of a tire for heavy goods vehicles according to a preferred first embodiment of the invention is depicted.

[0065] This preferred first embodiment comprises in each bead:

[0066] - a main carcass reinforcement portion 161 comprising a single layer of metallic reinforcing elements, which is wrapped around a bead wire core forming a turnback 162,

[0067] - The bead wire core comprises a circumferential reinforcing element made of metal 171 surrounded by a polymer material 172 .

[0068] - additional reinforcement 163,

[0069] - a filler forming element such that the bead wire core extends radially outwards, having a triangular cross-section in any meridian plane and being stacked in radial direction by three polymer materials 11 , 12 , 13 Formed, the three polymer materials 11, 12, 13 are in contact with each other respectively along contact surfaces which intersect any meridian plane along the meridians 112, 123,

[0070] - the polymer material 1...

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PUM

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Abstract

The invention relates to a tyre for a large goods vehicle, including two beads and a carcass reinforcement including a main portion (161) winding around a bead wire core (171, 172) in each bead to form a ply turn-up (162), each bead including an additional reinforcement (163) and a filling profile extending the bead wire core radially outward, said filling profile having a triangular section in every meridian plane and consisting of a stack of at least two polymer materials (11, 12, 13) in the radial direction, in contact according to a contact surface crossing every meridian plane along an at least partially convex meridian line (112, 123). The modulus of elasticity of the polymer material (11) of the filling profile in contact with the bead wire core is higher than the modulus of elasticity of any other polymer material (12, 13) of the filling profile.

Description

technical field [0001] The invention relates to a tire fitted to a heavy goods vehicle, such as a commercial vehicle intended to transport heavy loads. More specifically, the present invention relates to radial tires. [0002] The invention covers more particularly the beads of the tyre, that is to say those parts of the tire which provide a mechanical connection between the tire and the rim on which it is mounted. This tire comprises two beads connected respectively by two sidewalls to a tread strip intended to come into contact with the ground through the tread surface. Background technique [0003] The following definitions are used below: [0004] - "Meridian plane": the plane containing the axis of rotation of the tyre. [0005] - "equatorial plane": the plane passing through the middle of the tread surface and perpendicular to the axis of rotation of the tyre. [0006] - "radial direction": a direction perpendicular to the axis of rotation of the tyre. [0007] - ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C15/06
CPCB60C15/06B60C15/0607Y10T152/10837Y10T152/10819Y10T152/10846B60C15/0603B60C15/0628
Inventor B·格里森C·布瓦耶
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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