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Pneumatic-tyre

A technology for pneumatic tires and axles, which is applied to tire components, tire edges, wheels, etc., and can solve the problems of pneumatic tires biting rocks and improper geometric relationships

Inactive Publication Date: 2006-08-02
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the geometric relationship between the flange coverage and the rim flange is not proper, its pneumatic tire can still produce stone bite phenomenon

Method used

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  • Pneumatic-tyre
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  • Pneumatic-tyre

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] An example of implementation of the present invention will be described below based on drawings.

[0035] figure 1 Shown is a cross-sectional view of an assembly of a pneumatic tire 1 and a normal rim J mounted on a normal rim J and filled with normal air pressure while having no load under normal internal pressure, figure 2 An enlarged view of the bead portion is shown, image 3 shown as figure 2 oblique view. The so-called "regular rim" is the rim specified for each tire in the specification system containing the specifications on which the tire is based, such as the "standard rim" for JATMA, and the "Measuring Rim" for TRA. )", or in the case of ETRTO, "Measuring Rim". The so-called "regular internal pressure" is the air pressure specified by each specification for each tire in the specification system containing the specifications on which the tire is based. For example, JATMA is the highest air pressure, and TRA is the table "in different cold expansion The...

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PUM

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Abstract

The invention provides a pneumatic-tyre. To reduce the weight of a tire,this pneumatic tire 1 is provided with a rim protector 9 at a bead part 4, projecting outwardly in the tire axial direction and extending continuously in the tire circumferential direction. The rim protector 9 is provided with, on a tire meridian cross section assembled to a normal rim J and including a tire axis in the normal inner pressure state filled with a normal inner pressure without a load, a flange covering face 10 extending from a separation point P where the bead part 4 and a rim flange JF begin to separate outwardly in the tire radial direction along the rim flange via a gap to reach the outside in the tire axial direction more outside than the rim flange JF. On this flange covering face 10, a recess part 13 with the depth of 0.5 to 7.0 mm is provided.

Description

technical field [0001] The present invention relates to a pneumatic tire having a guard for protecting a rim flange. Background technique [0002] In recent years, in order to enhance the side rigidity of the tire and improve the sports performance, the flattening of the tire has been developed. For example, various tires with a flattening rate of less than 50% have appeared. As the flattening of tires develops, the section height of tires becomes relatively smaller, so the rim flange of the rim (rim) and the like pass relatively close to the road surface. For this reason, for example, when the vehicle is brought too close to a road cliff, the rim flange may come into contact with a curb or the like, or may be damaged by the impact of passing over a reflective nail on the road during driving. [0003] To prevent damage to such rim flanges, such as Figure 9 As shown, in the bead portion b, as covering the rim flange jf, it is proposed to provide a rim guard d protruding out...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C15/024B60C13/02B60C15/00B60C15/02
CPCB60C15/024Y10T152/10819B60C15/0242
Inventor 半谷正裕
Owner SUMITOMO RUBBER IND LTD