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
CN102802967AActive Publication Date: 2012-11-28MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
Publication Date
2012-11-28

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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.
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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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