Tyre crown for heavy goods vehicle of the civil engineering type

A technology for heavy-duty vehicles and tires, used in heavy-duty tires, tire treads/tread patterns, vehicle components, etc., to solve problems such as attacks

Active Publication Date: 2018-10-23
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The higher the volume-to-void ratio, the more the heat level of the crown is reduced, but the greater the risk of the crown being attacked by dents present in the road

Method used

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  • Tyre crown for heavy goods vehicle of the civil engineering type
  • Tyre crown for heavy goods vehicle of the civil engineering type
  • Tyre crown for heavy goods vehicle of the civil engineering type

Examples

Experimental program
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Effect test

Embodiment Construction

[0070] figure 1 Shows a meridian half-section of the crown of a tire 1 for a construction site type heavy vehicle comprising a tread 2 and a crown reinforcement 3 located radially inside the tread 2 , in the plane YZ. have a radial thickness H at least equal to 60 mm T The tread 2 consists of a width W D and radial depth H D The incision 21 and the relief element 22 separated by the incision 21. The width W of the notch 21 D At most equal to the radial depth H D 20% of the radial depth H D at least equal to the radial thickness H T 50% of , which is called the effective incision, and has a cumulative length L measured on the radially outer surface 23 of the tread 2 D (not shown in the figure). Tread 2 has m / m 2 Denoted surface notching TL, which is equal to the cumulative length L of the effective notch 21 D and the radially outer surface 23 of the tread is equal to 2ΠR E *W T The ratio between the area A, where R E is the outer radius of the tyre, measured in the...

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PUM

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Abstract

The invention relates to the crown of a tyre for a heavy goods vehicle for civil engineering. The aim of the invention is to desensitise said crown to stress. To this end, the tyre (1) comprises a tread (2) having a surface siping rate TL, expressed in m/m 2, which is equal to the ratio of the cumulated length L D of the cuts (21) to the area A of the radially outer surface (23) of the tread (2),and a protective reinforcement (4) comprising at least two protective layers (41, 42) consisting of elastic metal reinforcing elements and having a maximum tensile strength R max, expressed in daN/m,such that the surface siping rate TL of the tread (2) is at least equal to 3 m/m 2, and a coupling ratio C, equal to the ratio of the maximum tensile strength R max to the surface siping rate, is at least equal to 30000 daN.

Description

technical field [0001] The present invention relates to radial tires intended to be fitted to heavy vehicles of the construction site type, and more particularly to the crown of said tires. Background technique [0002] Radial tires for construction site type heavy vehicles are intended to fit on rims having a nominal diameter equal to at least 25 inches as defined by the ETRTO (European Tire and Rim Technical Organization) standard. Although not limited to this type of application, the invention is described more particularly with reference to large-sized radial tires intended to be mounted, for example, to dump trucks, vehicles for transporting material mined from quarries or from open pits. Large radial tires are understood as tires intended to be mounted on rims with a nominal diameter at least equal to 49 inches and which may be as large as 57 inches or even 63 inches. [0003] Since the geometry of the tire exhibits rotational symmetry about the axis of rotation, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/00B60C9/20B60C11/03
CPCB60C2011/0353B60C2011/0355B60C2200/065B60C11/00B60C2009/209B60C11/0311B60C1/0016B60C9/28B60C2011/0025B60C2011/0369
Inventor O·斯平恩莱尔F·尼吉耶A·多明戈
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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