Unlock instant, AI-driven research and patent intelligence for your innovation.

Tyre with a reduced-weight bead region

A technology for tires and bead wires, which is applied to heavy-duty tires, tire parts, reinforcement layers of pneumatic tires, etc., and can solve problems such as complex design

Active Publication Date: 2020-03-24
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The presence of these layers of reinforcing elements or rei

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Tyre with a reduced-weight bead region
  • Tyre with a reduced-weight bead region
  • Tyre with a reduced-weight bead region

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0104] exist figure 1 In , the size of tire 1 is 12R 22.5. Said tire 1 comprises a radial carcass reinforcement 2 anchored in two beads 3 . The carcass reinforcement 2 is wrapped at the crown of the tire by a crown reinforcement 5 which itself is covered by the tread.

[0105] The carcass reinforcement 2 formed of a single layer of metal cords is wound around the bead wires 4a, 4b in each bead 3 and forms in each bead 3 a roll of the carcass reinforcement layer with an end 8 Side 7.

[0106] The carcass reinforcement 2 is composed of reinforcing elements between two skins having a tensile modulus of elasticity at 10% elongation equal to 9.8 MPa.

[0107] The reinforcing elements of the carcass reinforcement 2 are cords of 19.18 construction with an elongation at break equal to 2.5%.

[0108] The cords of the carcass reinforcement of tire 1 are non-wrapped layered cords of 1+6+12 structure, comprising a central core formed by one wire, an intermediate layer formed by six w...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Tensile modulus of elasticityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a tyre with a radial carcass ply, consisting of a single layer (7) of reinforcement elements, which is turned up around a bead wire (4) such as to be anchored in each of the beads. According to the invention, the turn-up of the carcass ply layer (7) and the main part of the carcass ply layer are the only layers of reinforcement elements with elongation at break lower than6% present in the sidewall, said turn-up and the main part being coupled and then uncoupled, and any point of the profile of the outer surface S of the tyre between points F and E is at a distance ofless than 2.5 mm from the spline P, at least 95% of the points of the spline P being axially inside the points of a spline W.

Description

technical field [0001] The present invention relates to tires with radial carcass reinforcement, and more particularly to tires intended to equip vehicles carrying heavy loads and traveling at sustained speeds, such as trucks, tractors, trailers, or coaches. Background technique [0002] In tires of the heavy-duty type, the carcass reinforcement is usually anchored on both sides in the bead area and is covered radially by a crown reinforcement consisting of at least two overlapping and made of threads or cords The resulting layers consist of said threads or cords being parallel in each layer and crossing from one layer to the other, forming an angle with the circumferential direction of between 10° and 45°. Said working layer forming the working reinforcement may also be covered with at least one layer called protective layer, the reinforcing elements forming said protective layer being advantageously metallic and stretchable and called elastic reinforcing elements. It may ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B60C15/00B60C15/024B60C9/02
CPCB60C15/0054B60C15/0063B60C15/024B60C2009/0276B60C2015/009B60C2200/06
Inventor L·贝斯滕W·利桑塞
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN