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Pneumatic Tire

A technology for pneumatic tires and tires, which is applied to road vehicle tires, off-road vehicle tires, tire parts, etc. It can solve the problems of increased weight of the sidewall, deterioration of the durability of the bead, and deflection of the bead, and achieves the suppression Effect of cutting, maintaining durability, suppressing increase in mass

Active Publication Date: 2017-09-26
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned method has a problem in that the mass of the sidewall portion of the tire is excessively increased, and further, the bead portion is greatly deflected, thereby deteriorating the durability of the bead portion.

Method used

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Examples

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Comparison scheme
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Embodiment Construction

[0022] Hereinafter, one embodiment of the present invention will be described based on the drawings.

[0023] figure 1 It is a tire meridian cross-sectional view showing a pneumatic tire (hereinafter, sometimes simply referred to as a "tire") 1 according to an embodiment of the present invention, including a tire rotation axis (not shown) in a normal state. The "normal state" is a no-load state in which the tire 1 is assembled to a normal rim (not shown) and filled with a normal internal pressure. In this specification, unless otherwise specified, the dimensions and the like of each part of the tire 1 are values ​​measured in this regular state.

[0024] "Regular rims" are rims of various specifications for each tire in the specification system including the specifications on which the tires are based. For example, if it is JATMA, it is "standard rim", and if it is TRA, it is "Design Rim” or “Measuring Rim” for ETRTO. In addition, the "regular internal pressure" is the air ...

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Abstract

The invention provides a pneumatic tire for evenly improving endurance quality, off-road performance and cut resistance of a tire bead part. The pneumatic tire comprises a sidewall portion provided in its radially outer region B with side protectors protruding axially outwardly from the outer surface Ba of the radially outer region B. The side protectors are arranged in the tire circumferential direction at intervals so that grooved portions are formed between the side protectors. The width W1 in the tire circumferential direction of the grooved portion is in a range of from 50% to 70% of the width W2 in the tire circumferential direction of the side protector when measured at the same radial position.

Description

technical field [0001] The present invention relates to a pneumatic tire in which durability performance, off-road performance, and cut resistance performance of bead portions are improved in a balanced manner. Background technique [0002] For example, in a pneumatic tire mounted on a four-wheel drive vehicle, etc., it is preferable to have muddy performance as running performance on a muddy ground, and rock (rock) performance as running performance on a rocky road (hereinafter, these two performances are used). Incorporating a condition known as "off-road performance".). In order to improve off-road performance, a pneumatic tire has been proposed in which a plurality of side protectors (side protectors) protruding in the tire axial direction are provided on a sidewall portion. This pneumatic tire exhibits traction performance by hooking and friction between the side rails and rocks, and traction performance by cutting mud that has entered the groove-like portion formed be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C13/02
CPCB60C13/02B60C2200/04B60C13/002B60C13/023B60C11/01B60C2200/14
Inventor 景山尚纪
Owner SUMITOMO RUBBER IND LTD
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