Tire for a vehicle carrying heavy loads

A technology for heavy loads and tires, which is applied to heavy tires, heavy vehicles, vehicle parts, etc., and can solve problems such as failures

Active Publication Date: 2012-10-24
OCIETE DE TECH MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For heavy load-carrying machines such as construction machines used in mines, it is a known fact that the tread band of the tire fitted to said vehicle is subjected to repeated impacts which may apart from...

Method used

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  • Tire for a vehicle carrying heavy loads
  • Tire for a vehicle carrying heavy loads
  • Tire for a vehicle carrying heavy loads

Examples

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Embodiment Construction

[0034] figure 1 The rolling surface 10 of the tread band 1 of the tire according to the invention is shown. The tread band has an overall width W and has a median plane that divides the tread band substantially into two halves of equal axial width (which is the same as figure 1 The line of intersection of the planes is represented by line XX').

[0035] This tread band 1 comprises, on each side of the median plane XX', a plurality of transverse grooves oriented substantially in the transverse direction (that is to say at an angle of less than 45° to the axis of rotation (the axis whose direction is perpendicular to the direction XX') Slot 2. Each transverse groove 2 has an average depth and two ends 21, 22 of which one, the axially outer end 21, opens to the edge of the tread band and the other, the axially inner end 22 is not open laterally. This inner end 22 is located at a non-zero distance from the median plane. An intermediate portion of width Lc extending axially be...

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Abstract

The invention relates to a tire to be mounted on a vehicle carrying heavy loads, including a tread (10) provided with a plurality of grooves having a general transverse orientation (2), said tread being characterized in that it comprises at least three rubber-based materials: a first material M1 in the middle portion of the tread, having a secant modulus at a 10% extension as measured at a temperature of 23 DEG C of at least 4.0 MPa and hysteretic losses tan(d)max higher than 0.19; a second material M2 on the edge portions, having a secant modulus at a 10% extension as measured at 23 DEG C lower than that of the first material and a hysteretic loss value tan(d)max lower than that of the first material and of at least 0.15; and a third material M3 provided radially under materials M1 and M2 and having a hysteretic loss value tan(d)max lower than 0.12. The first material M1 further has a wear resistance at 15% higher than that of the second and third materials, the latter two materials having substantially the same wear resistance.

Description

technical field [0001] The present invention relates to tread bands (or tread tapes) for tires of heavy load-carrying machines, such as construction (or construction) machines, and more particularly to the material from which said tread bands are made. Background technique [0002] Tires for construction machines generally comprise a carcass reinforcement anchored in the beads, this reinforcement consisting of at least one ply of reinforcing elements capped radially on the outside by a crown reinforcement. This crown reinforcement is made of a plurality of plies of reinforcing elements crossed from one ply to the other and covered radially on the outside by the tread band, the purpose of which is to provide protection between the tire and its running Contact is provided between the surfaces and loads are transferred between the tire and the surfaces. [0003] In use, it is found that there are at least two desirable performance aspects, namely good resistance of the tread b...

Claims

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Application Information

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IPC IPC(8): B60C11/00B60C11/04
CPCB60C2011/0033B60C11/005B60C2200/06B60C2011/0025B60C11/0311B60C11/0058B60C11/0309
Inventor D·比雅维
Owner OCIETE DE TECH MICHELIN
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