Hoop reinforcements for tires of heavy civil engineering vehicles

A technology for heavy-duty vehicles and crown reinforcements, which is applied in the field of tire crown reinforcements, and can solve the problems of negative impact on tire manufacturing costs, material loss, etc.

Active Publication Date: 2021-07-13
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 presence of such layer waste leads to a loss of material, which has a negative impact on the manufacturing costs of the tire

Method used

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  • Hoop reinforcements for tires of heavy civil engineering vehicles
  • Hoop reinforcements for tires of heavy civil engineering vehicles
  • Hoop reinforcements for tires of heavy civil engineering vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0064] figure 1 Shown is a cutaway perspective view of a tire crown 1 according to the prior art, said tire crown 1 having:

[0065] - a tread 2 radially outside the carcass reinforcement 4,

[0066] - a crown reinforcement 3 comprising a protective reinforcement 5, a working reinforcement 6 and a hoop reinforcement 7,

[0067] - said protective reinforcement 5 is located radially outermost of the crown reinforcement 3 and comprises two protective layers (51, 52), each protective layer (51, 52) comprising a metallic reinforcement, said metallic reinforcement forming an angle at least equal to 10° with the circumferential direction (XX') which is tangent to the tire circumference,

[0068] - said working reinforcement 6 comprises two working layers (61, 62), each working layer (61, 62) comprising a metal reinforcement forming at least equal to 15° with the circumferential direction (XX') while at most an angle equal to 45° and one working layer intersects the next,

[0069...

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Abstract

The present invention relates to hoop reinforcements for tires of heavy civil engineering vehicles, with the aim of reducing the manufacturing costs thereof. The tire has a crown reinforcement (3) located radially on the inside of the tread (2), comprising a protective reinforcement (6), a working reinforcement (5) and a hooping reinforcement (7). Said hoop reinforcement (7) is composed of at least two hoop layers (71, 72), each hoop layer (71, 72) comprising a metal reinforcement coated with an elastomeric coating material and associated with The circumferential direction (XX') forms an angle equal to at most 2.5°. According to the invention, each hoop layer ( 71 , 72 ) is formed by circumferentially winding at least one portion of a metal reinforcement ply ( 81 , 82 ) annularly in a circumferential direction (XX'), said The metal reinforcement ply (81, 82) extends from a starting end (811, 821) to a terminating end (812, 822) such that the hooping layer (71, 72) includes at least one discontinuity (91, 92).

Description

technical field [0001] The subject of the present invention is a radial tire intended to be fitted to heavy vehicles of the construction site type, and more particularly the crown reinforcement of such a tire. Background technique [0002] Generally, radial tires for heavy vehicles of the construction site type in the sense of the European Tire and Rim Technical Organization or ETRTO standard are intended to be mounted on rims with a diameter at least equal to 25 inches. Although not limited to this type of application, the present invention describes large radial tires intended to be mounted by rims on dump trucks (vehicles used to transport material extracted from quarries or opencast mines), so The diameter of said rim is at least equal to 49 inches, and may be as much as 57 inches, or even 63 inches. [0003] Since the geometry of the tire exhibits rotational symmetry about the axis of rotation, the geometry of the tire is usually described in a meridian plane including...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/20B60C9/22
CPCB60C9/2006B60C2009/2223B60C2009/2238B60C2200/06B60C9/0007B60C9/12B60C9/185B60C9/22B60C9/24B60C2009/0021B60C2009/2012B60C2009/2045B60C2009/2214B60C2200/065
Inventor A·多明戈E·勒舍纳德克
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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