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Tire/wheel assembly

A technology for assembling bodies and wheels, applied to pneumatic tires, tire parts, tires, etc., can solve the problems of difficult, unsolved, and unsolved tire problems in tire assembly, improve drivability and durability, and ensure driving stability. The effect of excellent performance and rim assembly

Inactive Publication Date: 2019-02-05
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, it is necessary to manufacture a wheel with a special shape of a rim having a higher inner flange than usual, and since there are run-flat supports provided in advance along the outer circumference of the rim, it is necessary to attach the tire to the This is very difficult and mostly impossible due to the shape and size of the tire
In addition, in Patent Document 4, a polyurethane foam elastic body is also proposed for the structure and material of the run-flat support body. In addition, in Patent Document 5 and Patent Document 6, a method including a plastic material made of resin is proposed for durability and the like. A composite structure of a base material part formed of a foamed body, and a non-foamed resin outer layer part or its reinforcement layer, but these do not solve the problem of tire installation at all
[0005] In addition, in documents such as Patent Document 7, Patent Document 8, and Patent Document 9, a support body having the following structure is proposed as a run-flat tire running support body for the effects of weight reduction and ride comfort improvement. The ribs (rib) are combined radially between the inner peripheral body and the outer peripheral body of the outer peripheral surface, but these do not solve the problem when the tire is attached to the wheel rim

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1～3

[0059] The foamable compound which consists of the formulation of "foams 1-3" described in Table 1 was weighed, and it stirred at room temperature (25 degreeC) for 1 minute. Immediately after pouring into a mold of a predetermined shape, foaming was not observed for about 30 minutes after foaming started. This reactant was further left still for 24 hours to complete foaming and polymerization reaction, and foams 1 to 3 were obtained.

[0060] Using the foams 1 to 3 obtained above, the compressive strength and flexural strength were measured by the following measuring methods.

[0061] compressive strength

[0062] Using the obtained foam, the test piece for a measurement was produced based on JIS A9511. Using this test piece for measurement, a compression test was performed under the conditions of a temperature of 23° C. and a strain rate of 5 mm / min in accordance with JIS A9511, and the compressive strength at a strain of 10% was measured.

[0063] Bending strength

[006...

example 4

[0071] use form figure 2 The mold for the run-flat support body 3 shown in FIG. The obtained tire / wheel assembly was subjected to a run-flat driving test and its weight was measured by the method described above.

example 5

[0073] use form image 3 The mold for the run-flat support body 3 shown in , molds the run-flat support body composed of the above-mentioned foam body 3 . The obtained tire / wheel assembly was subjected to a run-flat driving test and its weight was measured by the method described above.

[0074] [Table 1]

[0075]

[0076] In addition, the kind of raw material used in Table 1 is as follows.

[0077] ・Polyol compound: polycarbonate diol, T5651 manufactured by Asahi Kasei Co., Ltd.

[0078] ・Amine compound: 1,4-diazabicyclo[2.2.2]octane, manufactured by Tokyo Chemical Industry Co., Ltd.

[0079] Catalyst: tin octoate, Neostan U-28 manufactured by Nitto Kasei Co., Ltd.

[0080] Foam stabilizer: silicone oil, FZ3703 manufactured by Toray Dow Corning Corporation

[0081] ・Isocyanate compound 1: polymethylene polyphenyl polyisocyanate, NCO group content rate 31%, Sumidur 44V10 manufactured by Sumika Bayer Urethane Co., Ltd.

[0082] ・Isocyanate compound 2: polymethylene pol...

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Abstract

Provided is a tire / wheel assembly with which durability during run-flat travel is improved to at least the level in the prior art. The tire / wheel assembly is obtained by providing a run-flat support 3to the inside of a tread part of a pneumatic tire 2, and is characterized in that: the run-flat support 3 comprises a foam; the height h of the run-flat support is at least 1 / 2 of the height H of theinner cavity of the pneumatic tire 2; when the internal pressure of the pneumatic tire is higher than a prescribed air pressure, the run-flat support 3 is not in contact with a rim 1 of a wheel, andside parts 5 and the inner circumferential surfaces of bead parts 6 of the pneumatic tire; and when the internal pressure of the pneumatic tire 2 is equal to or less than the prescribed air pressure,the inside of the run-flat support 3 in the radial direction of the tire is in contact with the outer circumference of the rim 1 of the wheel and / or the inner circumferential surfaces of the bead parts 3 of the pneumatic tire 2.

Description

technical field [0001] The present invention relates to a tire / wheel assembly that improves durability during run flat running. Background technique [0002] Conventionally, as run-flat tires that can run in emergencies such as when the internal pressure of a pneumatic tire decreases or when an air leak occurs, a structure in which a reinforcing layer that reinforces the sidewall portion supports the tire tread portion when the internal pressure decreases is generally adopted, However, the tire has higher rigidity than a normal tubeless tire, and there is a concern that handling, ride comfort, tire noise, and the like may deteriorate due to an increase in tire weight or the like. In addition, the following methods have been proposed: designing the shape of the inner flange part provided on the rim main body, forming a structure in which the tread part is supported by the inner rim flange part in an emergency; or providing a separate body from the tire inside the tire. A cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C17/06
CPCB60C17/06B29D30/0681B29D2030/0683
Inventor 木村和资岛田源一郎影山裕一
Owner THE YOKOHAMA RUBBER CO LTD
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