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Pneumatic tire

A technology for pneumatic tires and tires, which is applied to pneumatic tires, tire parts, tires, etc., can solve the problems of strip-shaped sound-absorbing parts that are easy to peel off, cannot fully relax tension, and strip-shaped sound-absorbing parts are broken, so as to improve durability and increase High-speed durability, anti-friction effect

Active Publication Date: 2018-09-28
THE YOKOHAMA RUBBER CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, in this case, since the belt-shaped sound absorbing material is directly attached to the inner surface of the tire, heat accumulation occurs in the tread portion, and there is a problem that high-speed durability deteriorates due to the heat accumulation.
In addition, when the tape-shaped sound-absorbing material is directly attached to the inner surface of the tire, there is a problem that the tape-shaped sound-absorbing material cannot follow the deflection of the tire and break when the tire rotates.
[0005] On the other hand, when grooves are provided on the inner peripheral surface of the belt-shaped sound absorbing member, although it can follow the deformation of the tire when the tire rotates, it cannot sufficiently alleviate the deformation caused by the increase in the outer diameter of the tire when the tire is inflated. The tension in the circumferential direction of the ribbon-shaped sound-absorbing parts, there is a problem that the ribbon-shaped sound-absorbing parts are easy to peel off

Method used

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  • Pneumatic tire
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Examples

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Effect test

Embodiment

[0040] Tires of Conventional Examples, Comparative Examples, and Examples 1 to 12 were manufactured. The tires had a tire size of 275 / 34ZR20 and were provided with: a tread portion extending in the tire circumferential direction and formed in an annular shape; a pair of sidewall portions disposed on Both sides of the tread portion; and a pair of bead portions, arranged on the inner side of the tire radial direction of these sidewall portions, a belt-shaped sound absorbing member is bonded along the tire circumferential direction on the inner surface of the tread portion, wherein, as shown in Table 1 and As shown in Table 2, whether there is a groove, the configuration of the groove, the angle θ of the groove, the depth of the groove (depth d / thickness D×100%), the width of the groove (width a / width A×100%) %) to set.

[0041] The high-speed durability of these test tires and the durability of the belt-shaped sound absorbing material at high deflection were evaluated by the fol...

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Abstract

Provided is a pneumatic tire in which notches are formed in the outer peripheral surface of a belt-shaped sound-absorbing member bonded to the tire inner surface, whereby it is possible to mitigate stress occurring in the belt-shaped sound-absorbing member, the stress accompanying growth in the outer diameter of the tire during inflation of the tire, to improve the durability of the belt-shaped sound-absorbing member, to promote dissipation of heat from the belt-shaped sound-absorbing member, and to improve high-speed durability. A pneumatic tire provided with a tread section 1 extending in the tire circumference direction and having an annular shape, a pair of sidewall sections 2 disposed on both sides of the tread section 1, and a pair of bead sections 3 disposed on the inner sides of the sidewall sections 2 in the tire-diameter direction, a belt-shaped sound-absorbing member 6 being bonded to the inner surface of the tread section 1 along the tire circumference direction, wherein the pneumatic tire has a plurality of notches 7 on the outer peripheral surface of the belt-shaped sound-absorbing member 6, and at least one end of each notch 7 terminates on the inner side of the belt-shaped sound-absorbing member 6.

Description

technical field [0001] The present invention relates to a pneumatic tire, and more specifically, relates to a device capable of alleviating the increase in the outer diameter of the tire accompanying tire inflation by adding grooves to the outer peripheral surface of a belt-shaped sound absorbing member bonded to the inner surface of the tire. The tension generated in the sound-absorbing belt improves the durability of the sound-absorbing belt and promotes heat dissipation from the sound-absorbing belt to improve the high-speed durability of the pneumatic tire. Background technique [0002] One of the causes of tire noise is cavity resonance sound caused by vibration of air filling the tire cavity. When the vehicle is running, the tread portion of the tire in contact with the road surface vibrates due to unevenness of the road surface, and the vibration vibrates the air in the tire cavity to generate the cavity resonance sound. There is a frequency range constituting noise ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C5/00
CPCB60C5/00B29D30/0061B29D2030/0682B60C19/002B60C5/002B60C5/142
Inventor 干场崇史
Owner THE YOKOHAMA RUBBER CO LTD
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