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Pneumatic tire

A pneumatic tire, tire circumferential technology, applied in tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve the problems of tire snow performance reduction, snow traction reduction, etc., to improve snow performance The effect of improving ground performance, improving stability, and improving uneven wear resistance

Active Publication Date: 2010-08-25
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if ribs are placed on the shoulders, the snow traction performance of the tire decreases due to the sipes, and the snow performance of the tire decreases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Examples 1 to 7 are examples in which the number of pitches of each chamfered portion is 3 pitches, and the largest chamfered portion is arranged in the middle of the sipe groove. Furthermore, in Example 1, the depth of the maximum chamfered portion was 20% of the maximum main groove depth. In Example 2, the depth of the maximum chamfered portion was 30% of the maximum main groove depth. In Example 3, the depth of the maximum chamfered portion was 40% of the maximum main groove depth. In Example 4, the depth of the largest chamfered portion was 50% of the maximum main groove depth. In Example 5, the depth of the maximum chamfered portion was 60% of the maximum main groove depth. In Example 6, the depth of the maximum chamfered portion was 70% of the maximum main groove depth. In Example 7, the depth of the maximum chamfer was 45% of the maximum main groove depth.

[0058] In addition, Examples 8 to 11 are examples in which the depth of the maximum chamfer is 45% of ...

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PUM

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Abstract

This invention provides a pneumatic tire with directional tread pattern which can improve the anti-irregular wear performance without reducing the snow operational stability. Said tire form a tread pattern array through the multiple main grooves (1,2) extending along the circumferential direction of the tire and the tread pattern groves(3) that slantingly communicates with the main grooves insidethe external main grooves (2). There arranged multiple cut pattern (7) in these pattern blocks (5), therefore, forming directional tread patterns which is characterized in that there formed half-closing tire pattern (4) and strip patterns(6) that are arranged with cut pattern (7) in the tire shoulder S outside the external main grooves (2), and there intermittently and continuously formed multiple chamfer section (8) in the inner edge of the strip patterns(6) along the tire width direction. Said chamfer section (8) has a shape, of which the chamfering valve is periodically changed along the circumferential direction of the tire.

Description

technical field [0001] The present invention relates to a pneumatic tire, and more particularly, to a pneumatic tire which can improve uneven wear resistance without deteriorating handling stability on snow, and is particularly suitable for a light truck tire. Background technique [0002] Generally, on the tread pattern of a pneumatic tire, the sipes inclined with respect to the tire circumferential direction have an extended component in the tire circumferential direction and an extended component in the tire width direction. Brake drive effect and anti-skid effect on the vehicle. Therefore, blocks having such inclined sipes are often used in winter tires that require excellent snow performance (for example, refer to Japanese Patent Laid-Open Publication No. 2002-274126). [0003] On the other hand, the wear characteristics of the tires differ depending on the front and rear wheels of the vehicle and the tire installation positions, so it is necessary to periodically chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03
CPCB60C2011/0369B60C11/0302B60C2011/1245B60C11/12B60C2011/1213
Inventor 永吉胜智
Owner THE YOKOHAMA RUBBER CO LTD
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