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A noise reducing tread

A technology for treads and tires, applied in tire treads/tread patterns, tire parts, vehicle parts, etc., can solve the problems of reduced tread productivity, difficulty in molding and demolding flexible baffles, and weakening. To achieve the effect of improving drainage capacity

Active Publication Date: 2018-08-21
OCIETE DE TECH MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with this configuration, the coverage of the section of the groove by the flexible baffle is weakened by said notches, and there are difficulties in molding and demoulding such a flexible baffle, which leads to the productivity of this tread reduce

Method used

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  • A noise reducing tread
  • A noise reducing tread
  • A noise reducing tread

Examples

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Embodiment Construction

[0049] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0050] will refer to figure 1 , figure 2 and image 3 A tread 1 of a tire according to a first embodiment of the present invention is described. figure 1 is a schematic view of a part of a tread 1 according to a first embodiment of the invention. figure 2 is an enlarged schematic diagram showing the figure 1 The part indicated as II in . image 3 is along figure 1 A schematic cross-sectional view taken along line III-III in .

[0051] Tread 1 is that of a tire having dimensions 225 / 45R17 and includes a contact surface 2 intended to come into contact with the ground during rolling, a plurality of main grooves extending in the tire circumferential direction indicated as XX' 3. The main groove 3 is delimited by two groove side walls 31 , 32 facing each other and connected by a groove bottom 33 . The main groove 3 has a width at the level of t...

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PUM

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Abstract

The present invention provides a tread for a tire having a primary groove (3) being provided with a plurality of closing devices (4) including at least two flexible fences (41, 42), at least one firstflexible fence (41) having thickness t1 and extending from a groove bottom (33) in a radially outward direction, and at least one second flexible fence (42) having thickness t2 and extending from onegroove sidewall toward the other groove sidewall, the second flexible fence being shaped so as to form an angle A1 between an imaginary line connecting a free end of a top edge of the second flexiblefence and a free end of a bottom edge of the second flexible fence and an imaginary line extending from the free end of the top edge in a tire radial direction, a width wb1 of the first flexible fence at the groove bottom is at most equal to 45% of a width WB of the groove bottom of the primary groove, and a width wb2 of the second flexible fence at the bottom edge is at most equal to 40% of thewidth WB.

Description

technical field [0001] The present invention relates to a tread for tyres, in particular to a tread for tyres, having closing means that make it possible to attenuate the noise generated by groove resonance in the main grooves. Background technique [0002] Groove resonance results from resonance in the column of air defined between the grooves in the tread and the road surface in contact with the tire. The frequency of this groove resonance depends on the length of the air column formed between the groove and the road surface in the contact zone. [0003] This groove resonance causes, on vehicles equipped with such tires, internal and external noises, the frequencies of which are usually around 1 kHz, to which the human ear is sensitive. [0004] In order to reduce such groove resonances, it is known to provide in each main groove a plurality of closing means in the form of flexible baffles made of rubber-based material and relatively thin in thickness. Effectively, each ...

Claims

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Application Information

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IPC IPC(8): B60C11/04B60C19/00
CPCB60C11/047B60C19/002B60C2011/1338B60C2011/1361B60C11/1307B60C11/1353
Inventor 手塚隆
Owner OCIETE DE TECH MICHELIN