Tyre bead without bead core
A tire and carcass technology, applied in tire parts, tire rims, wheels, etc., can solve problems such as increased cost, time-consuming, difficult to control, etc.
Inactive Publication Date: 2005-04-20
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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- Abstract
- Description
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- Application Information
AI Technical Summary
Problems solved by technology
[0007] Currently, although tire production methods are quite highly developed, application of bead wire requires separate production and treatment (e.g. coating) of said bead wire, transport of the bead wire, and placing it in the building drum or a given support to produce the bead, all of which are time-consuming and require multiple protection measures, thus increasing costs
In addition, current tires are subject to increasing driving torque, and the compromise between the tightening on the rim necessary to avoid undue rotation and the maximum tightening to be mounted on the rim, currently has a bead wire In the construction of tires, the carcass reinforcement is wound around the bead wire, which is difficult for the technicians of this technology to control
Method used
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Embodiment Construction
[0033] Agricultural tractor tires of size 540 / 65 R26 ( figure 1 ) has an H / S shape ratio of 0.65. The tread (not shown) of said tire is connected to the bead 3 by means of two sidewalls 2 . Said tire is reinforced with a radial carcass reinforcement 1 whose top surface is covered with a top reinforcement (not shown), and said carcass reinforcement is made of nylon strings 11 and 12 of 140×2 Constructed of two radial fabric wire mesh layers. Seen in meridian section, the meridian section of the geometric center line of the stiffener (shown in dashed lines) is constituted by a first concave circular arc AB, said section being considered to lie on a line XX parallel to the axis of rotation on which the rim and tire are mounted ', and through the point in the rim flange corresponding to the bead of the tire in question that is furthest from the axis of rotation. The arc AB is tangent at A to the meridian section of the carcass reinforcement in the sidewall 2, and at B to the se...
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The invention relates to a tire for mounting on a rim, the rim flange having a circular groove, the tire comprising a tread connected to two bead by means of two sides and at least one main body ply reinforcement. Each bead is free of bead wires, the body ply reinforcement has in each bead a meridian section that is axially and radially curved outwardly inwardly to form an axially inner edge, It lies within an angle α open axially and radially inwards, one side of which is parallel to the axis of rotation, and whose value is not less than 25°, the main ply reinforcement in the tire bead at least radially Outwardly and axially inwardly reinforced by at least a first auxiliary continuous layer having a meridian section parallel to the meridian section of the main ply reinforcement in the bead and comprising at least a first portion formed by the Consists of plies formed of inextensible reinforcing elements circumferentially angled between -2.5° and +2.5°.
Description
technical field [0001] The present invention relates to a tire comprising at least one tread and a carcass reinforcement connected by means of two sidewalls to two beads, said tire being applicable with or without a separate inner tube and used in Mounted on standardized rims and inflated, it can be used as equipment on any rolling vehicle. Background technique [0002] Tires can be mounted on several types of standardized rims. The rim may have a frustoconical base inclined relative to the axis of rotation forming an angle with said axis of between 4° and 16°. Among the latter are solid rims, which will hereafter be referred to as hollow, semi-hollow or even concave-centre rims, or rims made up of several segments, which are referred to as transitional or "front" rims. The rim in question may also have a rim seat with parallel axes of rotation, commonly referred to as a planar-based rim. [0003] The most commonly used rims are so-called hollow or grooved rims, which inc...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B60C15/00B60C15/02B60C15/024
CPCB60C15/0018B60C15/0203B60C15/024Y10T152/10828Y10T152/10855Y10T152/10846Y10T152/10819B60C15/00
Inventor 让·比埃皮埃尔·迪里夫
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN