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Tire/wheel assembly

An assembly and wheel technology, applied to wheels, tire parts, vehicle parts, etc., can solve the problems of large impact, large impact, and difficulty in inserting the support body for deflated driving, etc., to achieve small impact, good assembly, and improved The effect of durability

Inactive Publication Date: 2005-08-31
THE YOKOHAMA RUBBER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the inner diameter of the support body for running flat is the same as the inner diameter of the bead (tire bead) portion of the pneumatic tire, the outer diameter is formed to be larger than the inner diameter of the bead portion. Inserts into the inside of the pneumatic tire
[0005] Therefore, if the outer diameter of the run-flat support body is too large, not only will it become difficult to insert the run-flat support body into the tire, but also the impact received from the road surface will increase during run-flat running. There is a problem that the impact becomes very large when passing over a protrusion such as a reflector (road sign) during left and right low pressure driving

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029]Set the tire size and rim size to 205 / 55R16 and 16×6 1 / 2JJ, respectively, and set the radial difference B between the inner diameter end of the annular shell of the run-flat support body and the outer diameter end of the rim flange to 5mm , taking the above points as the same conditions, and making the ratio of the cross-sectional height A of the support body for run-flat with respect to the tire cross-sectional height SH different as shown in Table 1, seven kinds of tire / wheel assemblies were produced ( Conventional Example, Comparative Examples 1 to 3, and Examples 1 to 3).

[0030] For these seven types of tire / wheel assemblies, run-flat durability, low-pressure impact resistance, and run-flat impact resistance were measured according to the following measurement methods, and the results are shown in Table 1.

[0031] Run-flat durability

[0032] The tire pressure is set to 0, and the test tire / wheel assembly is installed on the left side of the front wheel of a pa...

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PUM

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Abstract

A tire / wheel assembly, wherein a run-flat support body ( 3 ) comprising an annular shell ( 4 ) having an outer peripheral side as a support surface and an inner peripheral side formed in fork-shaped open legs and elastic rings ( 5 ) supporting the ends of the fork-shaped open legs on a rim is inserted into the hollow part of a pneumatic tire ( 2 ), and the height (A) of the run-flat support body ( 3 ) in the cross section thereof is 40 to 47% of the height (SH) of the pneumatic tire ( 2 ) in the cross section thereof.

Description

technical field [0001] The present invention relates to a tire / wheel assembly, and more specifically, to a tire / wheel assembly capable of suppressing low shock during run-flat running and low-pressure running and improving run-flat (run-flat) durability. Background technique [0002] Due to market demands, various technologies have been proposed that enable emergency driving of several hundreds of kilometers even when a pneumatic tire is punctured while the vehicle is running. Among the above-mentioned proposals, the technology proposed in JP-A-10-297226 and JP-A-2001-519279 is to install a core body on the rim inside the cavity of a pneumatic tire mounted on the rim. A technology that realizes run-flats by supporting a punctured tire with this core. [0003] The run-flat core (support body) is composed of an annular casing having a fork leg structure in which the inner peripheral side is bifurcated while the outer peripheral side is used as a support surface, and elastic r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C17/04B60C17/06
CPCB60C17/06B60C17/043Y10T152/10009B60C17/04
Inventor 志村一浩关口巧内藤充
Owner THE YOKOHAMA RUBBER CO LTD
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