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Tires with reinforced beads for heavy goods vehicles

A technology for goods and tires, which is applied to vehicle parts, tire parts, tire edges, etc. to achieve the effect of enhancing bonding

Inactive Publication Date: 2015-08-26
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] Although such a structure significantly reduces bead deterioration, there are still areas on the radially inner side of the anchoring structure that experience high concentrations of crack initiation stress

Method used

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  • Tires with reinforced beads for heavy goods vehicles
  • Tires with reinforced beads for heavy goods vehicles
  • Tires with reinforced beads for heavy goods vehicles

Examples

Experimental program
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Embodiment Construction

[0043] It is important for those skilled in the art to distinguish between several different uses of the term "radial". First, the expression refers to the radius of the tire. In this sense, a point P1 is said to be "radially inside" a point P2 (or "radially inside" a point P2) if it is closer to the axis of rotation of the tire than a point P2. Conversely, a point P3 is said to be "radially outside" a point P4 (or "radially outside" a point P4) if it is farther from the axis of rotation of the tire than a point P4 is. Extension in the direction of the smaller (or larger) radius is referred to as "radially inward (or outward)" extension. This meaning of the term also applies to radial distances.

[0044] In contrast, a thread or reinforcement is said to be "radial" when the reinforcing elements of the thread or reinforcement form an angle greater than or equal to 80° and less than or equal to 90° with the circumferential direction. It should be noted that in this context th...

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PUM

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Abstract

Tyre (10) for a heavy goods vehicle comprising a radial carcass reinforcement (60) anchored in each of the beads (50) to an anchoring structure (700), comprising a circumferential reinforcement (70), the carcass reinforcement (60) being partially wrapped around the anchoring structure (700), the tyre (10) also comprising a coupling reinforcement (150) comprising a first part (151) in contact with the carcass reinforcement (60) and being extended by a second part (152) in contact with the anchoring structure (700) as far as a point (157) radially on the outside of the anchoring structure (700), located axially between the axially innermost point (702) and the axially outermost point (704) of the anchoring structure (700), the tyre (10) also comprising a stiffening reinforcement (160) surrounding the coupling reinforcement (150) and running radially on the inside of the anchoring structure (700) and of the coupling reinforcement (150), wherein the axially outside end point (166) of said stiffening reinforcement (160) is located at a radial distance DR from the radially innermost point (73) of the circumferential reinforcement (70), the radial distance DR being greater than or equal to 0.2 times and less than or equal to 0.6 times the distance DC between the radially outermost and radially innermost points (62, 63) of the carcass reinforcement, and wherein, radially on the outside of the anchoring structure (700), the minimum distance DT between the axially external portion (162) of the stiffening reinforcement (160) and the carcass reinforcement (60) is greater than or equal to 2 mm.

Description

technical field [0001] The invention relates to tires having radial carcass reinforcements and designed to be fitted to heavy goods vehicles. More particularly, the invention relates to the bead structure of these tires. Background technique [0002] Heavy goods vehicle tires comprise a crown portion which is extended on each side by sidewalls terminating in beads. Such tires comprise a plurality of reinforcements, including in particular carcass reinforcements, whose function is to withstand the forces generated by the internal inflation pressure of the tyre. The carcass reinforcement is located in the crown and sidewalls of the tyre, and the ends of the carcass reinforcement are anchored to suitable anchoring structures located in the beads. The carcass reinforcement is essentially composed of a plurality of reinforcing elements arranged parallel to each other and forming an angle with the circumferential direction close to or equal to 90 degrees (in which case the carca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C15/06B60C15/00
CPCB60C15/06B60C15/0027
Inventor P·约翰逊B·格里森O·勒内弗
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN