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Pneumatic radial tire

A radial tire and tire technology, applied in the reinforcement layer of pneumatic tires, heavy-duty tires, special tires, etc., can solve the problems of poor durability of the belt layer, prevent air bubbles, reduce shear stress, and inhibit separation. Effect

Inactive Publication Date: 2008-11-19
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the latter tire, there arises a problem that interlayer separation is formed between each laterally outer end portion of the belt reinforcing layer and the belt layer, so that the durability of the belt layer deteriorates.

Method used

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  • Pneumatic radial tire
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  • Pneumatic radial tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] A test example will be described below. The following tires are provided for this test: A conventional tire in which all reinforcements constituting the belt reinforcement have a width of figure 1 narrower than the width of the belt layer as shown; the tire in Example 1, wherein only the inner belt layer is wider than the width of the belt reinforcement layer, and the elastic rubber layer is not provided therebetween; the tire in Example 2, Among them, only the width of the inner belt layer is wider than that of the belt reinforcement layer, and the elastic rubber layer such as figure 2 set therebetween as shown; the tire in embodiment 3, wherein only the width of the inner belt layer is wider than the width of the belt reinforcement layer, and as Figure 5 As shown, the elastic rubber layer is disposed therebetween on the entire area; tires in embodiments 4, 5, and 6, wherein only the width of the outer belt layer is wider than the width of the belt reinforcement lay...

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PUM

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Abstract

A belt durability is improved by effectively suppressing an interlayer separation between each widthwise outer end portion of a belt reinforcing layer 41 and a belt layer 34, in which each widthwise outer end 45 of one widest-width inner belt ply 35a is located outward from each widthwise outer end 46 of widest-width reinforcing plies 42a, 42b in the widthwise direction and hence reinforcing elements of the belt plies are not crossed with each other at the outside from the each widthwise outer end 46 in the widthwise direction. Therefore, the each widthwise outer end portion of the inner belt ply 35a is easily reduced in the widthwise direction, whereby shearing deformation in section to the each widthwise outer end portion of the reinforcing ply 42a, 42b is reduced.

Description

[0001] This application is a divisional application of the application dated November 14, 2002, the application number is 02825210.1, and the invention title is "Pneumatic radial tire". technical field [0002] The present invention relates to a pneumatic radial tire in which a belt reinforcing layer is arranged between a carcass ply and a belt layer in which reinforcing elements extending substantially in the circumferential direction are embedded, and the invention proposes a A technique capable of suppressing interlayer separation between a laterally outer end portion of a belt reinforcing layer and a belt layer. Background technique [0003] In recent years, as the speed of automobiles has increased, the bottom plate has become lower and lower, and pneumatic radial tires have become flatter. Therefore, attempts have been made to increase the radial dimension growth of the tread portion by filling the internal pressure. Such an increase in the amount of growth in the radi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/18B60C1/00B60C15/00B60C9/20B60C9/22B60C9/28
CPCB60C9/18B60C9/22B60C9/28B60C2200/06B60C9/2006B60C2009/1842Y10T152/10783Y10T152/1081
Inventor 鹤田诚
Owner BRIDGESTONE CORP
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