Tyre tread for hgv trailer

Abstract

The invention relates to a tyre tread (1) for a HGV divided into a central portion (20) and edge portions (30), the central portion (20) having a width Lc at least equal to 40% of the total width W ofthe tread and at most equal to 90% of said width W, the edge portions (30) being free of any transverse cut, the central portion (20) being provided with a tread design determined by at least one incision having a circumferential orientation (21) and a plurality of incisions having a transverse orientation (22, 22', 22'') distributed over the perimeter of the tread, said circumferential and transverse incisions having a depth at least equal to 60% of the thickness E of wearing material and being interconnected with one another in order to constitute a network, said circumferential and transverse incisions being extended by hidden channels (210, 220). Said tread (1) is such that the central portion (20) is axially defined by transverse incisions (22', 22''), each of said transverse incisions (22', 22'') ending in an end channel (221', 221'') open onto the tread surface (10) and extending into the thickness of the thread, and such that each end channel (221', 221'') is connected to thenetwork formed by the hidden channels (210, 220, 220', 220'').

Description

technical field [0001] The present invention relates to tires for heavy vehicles, and more particularly to tires intended to be mounted to the load-bearing axles of trailer-type vehicles having two or three axles. More specifically, the invention also relates to a tread pattern for such tire treads, intended to improve the wear of this type of tire. Background technique [0002] Tires for heavy vehicles comprising beads intended to come into contact with the mounting rim, these beads being continued radially outwards by sidewalls which themselves are attached to either side of the crown portion covered by the tread , the function of the tread is to provide contact between the tire and the road when the tire is running. [0003] Such tires comprise a carcass reinforcement anchored in the beads, which reinforcement extends through the sidewalls up to the crown of the tyre. In the crown portion of the tyre, the radially outer portion of this carcass reinforcement (formed by o...

AI Technical Summary

Problems solved by technology

[0019] While these solutions provide an improvement in irregular wear, it has been found that for tires mounted on axles that do not follow a circular path, the outer portion of these tires (that is, the axially outer portion of its tread) part) is subject to a large amount of sliding relative to the road surface, which results in a more pronounced wear of the axially outer part

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