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Run-flat tire

A run-flat and tire technology, applied in the direction of pneumatic tires, tire parts, vehicle parts, etc., can solve the problems of reduced high-speed durability of tires and increased heat storage, so as to suppress the deterioration of high-speed durability and reduce heat storage , The effect of improving durability

Active Publication Date: 2019-04-02
THE YOKOHAMA RUBBER CO LTD
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Problems solved by technology

[0005] However, since the strip-shaped sound-absorbing material is arranged in the central region of the tread portion, the heat storage amount during running is relatively large in the central region of the tread portion, and there is a possibility that the heat storage may be caused by the heat storage. And the high-speed durability of the tire is easy to decrease

Method used

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example

[0049] In the tire size 245 / 50R19, a carcass layer mounted between a pair of bead portions and a run-flat reinforcing layer with a crescent-shaped cross-section on the inside of the carcass layer in the sidewall portion in the tire width direction are provided, and the tire In the run-flat tire in which a belt-shaped sound-absorbing material extending in the tire circumferential direction is bonded to the area corresponding to the tread portion of the inner surface, the presence or absence of the belt-shaped sound-absorbing material, the presence or absence of the belt-shaped sound-absorbing material, and the The location of the parts, the ratio of the thickness D to the width W of the band-shaped sound-absorbing parts (D / W), the ratio of the thickness D of the band-shaped sound-absorbing parts to the tire section height SH (D / SH×100%), and the ratio of the band-shaped sound-absorbing parts The presence or absence of grooves in the material and the shape of the circumferential ...

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Abstract

Provided is a run-flat tire in which run-flat durability is improved by the arrangement position and shape of a band-shaped sound-absorbing member bonded to the tire inner surface, and the deterioration of high-speed durability can be suppressed. A run-flat tire provided with a carcass layer 10 mounted between a pair of bead sections 3, and a cross-sectionally crescent-shaped run-flat reinforcement layer 17 on the inner side of the carcass layer 10 in the sidewall sections 2 in the tire width direction, the band-shaped sound-absorbing member 6, which extends in the tire circumferential direction, being bonded in a region of the tire inner surface corresponding to a tread section 1, wherein the band-shaped sound-absorbing member 6 is disposed locally in at least one shoulder region among the regions corresponding to the tread section 1.

Description

technical field [0001] The present invention relates to a run-flat tire having a run-flat reinforcing layer having a crescent-shaped cross-section on a side wall, and more specifically, relates to a method for disposing a sound-absorbing material in the form of a belt bonded to the inner surface of the tire. The run-flat tire which designs it with a shape, and can improve the run-flat durability, and suppresses deterioration of the high-speed durability. Background technique [0002] As a pneumatic tire capable of running in a flat state, a side-reinforced run-flat tire is proposed in which a run-flat reinforcing layer having a crescent-shaped cross section is disposed inside a sidewall portion (for example, refer to Patent Documents 1 and 2). In such a side-reinforced run-flat tire, since the load can be held by the rigidity of the side wall reinforced by the run-flat reinforcing layer, it is possible to run for a predetermined distance even when the internal pressure is ze...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C5/00B60C17/00
CPCB60C17/00B60C5/00B60C19/002B60C17/0009
Inventor 干场崇史
Owner THE YOKOHAMA RUBBER CO LTD
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