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Pneumatic tire

A technology of pneumatic tires and tires, applied in off-road vehicle tires, tire parts, tire treads/tread patterns, etc., can solve the problems of easy damage and cutting resistance at the bottom of grooves, difficulty in maintaining uniformity, etc., and improve locking performance. , Improve uniformity, improve the effect of cutting resistance

Active Publication Date: 2019-08-23
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in such tires, since the groove area is also large in the shoulder region and the sidewall region, there is a problem that stones, rocks, and foreign matter on the road surface are likely to enter the grooves provided in the shoulder region or the sidewall region. In the groove, the bottom of the groove is easily damaged (poor cutting resistance)
In addition, there is a problem that it is difficult to maintain uniformity due to the complicated irregularities formed from the shoulder area to the sidewall area depending on the presence or absence of blocks on the tire circumference.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0043] Made a tire size LT265 / 70R17 with figure 1 The basic structure of the example and the figure 2The tread pattern is the keynote, and the shape of the sidewall block, the presence or absence of overlapping of the circumferential part of the sidewall block, the positional relationship between the inner / outer block and the first / second block, the tire circumferential direction of the first block The relationship between the length LA of the portion and the length LB of the tire radial portion of the second block (the relationship between the lengths LA and LB), the position of the tread portion side end of the sidewall block, and the bead portion side end of the sidewall block The position of the sidewall block, the inclination angle θ of the radial part of the sidewall block relative to the tire radial direction, the presence or absence of the groove bottom protrusion of the sidewall groove, and the positional relationship of the inner / outer block on one side / the other si...

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PUM

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Abstract

Provided is a pneumatic tire suitable for traveling unsealed roads and capable of achieving a balanced improvement in traveling performance on unsealed roads, cut resistance, and uniformity. Side blocks are provided at each extension position on the tire width direction sides of a shoulder block. Each side block is configured in an L shape in which a radial direction section extending in the tireradial direction and a circumferential direction section extending in the tire circumferential direction are coupled in a hook shape. A first block and a second block among the side blocks are configured so as to face each other and form a pair such that the circumferential direction sections of each overlap, said first block having the circumferential direction section thereof facing the shoulderblock side and said second block having the radial direction section thereof facing the shoulder block side. The side block pair comprising this first block and second block is arranged in the tire circumferential direction.

Description

technical field [0001] The present invention relates to a pneumatic tire suitable as a tire for running on unpaved roads, and more specifically, to a pneumatic tire capable of improving running performance on unpaved roads, cut resistance, and uniformity in a well-balanced manner. Background technique [0002] In the pneumatic tires used for driving on unpaved roads such as uneven ground, muddy ground, snowy road, sandy ground, and rocky ground, horizontal grooves (Japanese: rag grooves) with many edge components are generally used. Large tread pattern. In such tires, mud, snow, sand, stones, rocks, etc. (hereinafter, collectively referred to as "mud, etc.") on the road surface are bitten to obtain traction performance, and mud, etc. Driving performance on unpaved roads. In particular, in tires intended to run on rocky ground, the running performance on rocky ground (lock performance) is improved by providing blocks also in the sidewall area on the outer side in the tire w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/01B60C11/03
CPCB60C11/01B60C2200/14B60C11/11B60C13/02B60C2011/1361
Inventor 村田尚久
Owner THE YOKOHAMA RUBBER CO LTD
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