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Radial tyre crown reinforcement

A technology of reinforcing parts and reinforcing parts, which is applied to the reinforcement layer of pneumatic tires, tire parts, heavy-duty tires, etc., can solve the problems of high material cost and suboptimal fatigue resistance.

Inactive Publication Date: 2006-09-20
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The fatigue strength of the ring part is not optimal unless the minimum density of the part at the edge of the ply and the minimum resistance to fracture of the part are taken into account, which results in high material costs

Method used

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  • Radial tyre crown reinforcement
  • Radial tyre crown reinforcement

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Experimental program
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Embodiment Construction

[0030] exist figure 1 In , a tire of size 495 / 45R 22.5X has a shape ratio H / S of 0.45, where H is the height of the tire mounted on the rim and S is its maximum axial width. The tire has a radial carcass reinforcement 1 fixed on both sides of at least one bead wire forming an upturn and consisting of a single ply of metal cords. This carcass reinforcement 1 is hooped by a crown reinforcement formed radially from the inside out:

[0031] A first working ply 32 consisting of inextensible 27.23 (which means consisting of 27 steel wires each equal to 0.23 mm in diameter) ring metal cords, continuous across the width of the ply, and oriented in a An included angle α equal to 18°, as shown, said ply has a modulus of elasticity per unit width, taking into account the chosen spacing between wires, of 5300 daN / mm 2 ;

[0032] An auxiliary reinforcement surrounds the first working ply 32, the auxiliary reinforcement consisting of:

[0033] * An intermediate part 33' in the form of a...

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PUM

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Abstract

A tire having a crown reinforcement formed of at least two working crown plies (32, 34) having axial widths L32, L34 greater than the width L33 of an additional reinforcement (33) of inextensible, substantially radial reinforcement elements, which reinforcement is arranged radially between said plies (32, 34) and is axially composed of three parts, a central part (33') in the form of a ply formed of inextensible, substantially radial reinforcement elements and two lateral parts in the form of strips (33''), each formed of circumferential reinforcement elements, the modulus of elasticity upon traction per unit of width of a lateral strip being at most equal to the modulus of elasticity upon traction, measured under the same conditions, of the most extensible working ply.

Description

technical field [0001] The invention relates to a tire with radial carcass reinforcement fixed on at least one of its sides on bead wires and having at least two so-called working cords superimposed and made of wires or ropes A crown reinforcement made of plies, the wires or cables running parallel in each ply, and one ply intersecting the next ply, forming an angle with the tire circumferential direction of up to 45° in absolute value. Background technique [0002] It relates in particular to "truck" tires having a ratio of height H on the rim to the maximum axial width S of at most approximately 0.8 and mounted on vehicles of medium or heavy tonnage, such as trucks, buses, trailers, etc. [0003] Due to the improvement of the road network and the growth of fast lanes around the world, some popular tires, the so-called "road" tires, tend to travel longer and longer distances at high speeds. A tire under all these conditions needs to be able to reduce tire wear and increase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/20B60C9/22B60C9/18
CPCB60C2200/06B60C2009/2041B60C9/22B60C9/2006Y10T152/10801Y10T152/10765
Inventor G·格鲁泽
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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