Pneumatic tire

A technology of pneumatic tires and tires, which is applied to off-road vehicle tires, tire parts, tire treads/tread patterns, etc., which can solve the problems of easy decline in wear resistance and achieve the effect of maintaining wear resistance

Active Publication Date: 2020-04-03
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 a tire, since the groove area is set to be large in order to sufficiently bite into mud or the like, or the sipe is provided in each block to increase the edge component, there is a problem that the block rigidity tends to decrease and it is difficult to achieve a high degree of stability. The problem of taking into account the improvement of driving performance (especially traction performance and starting performance) on unpaved roads and ensuring the wear resistance of the blocks

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0044] Made a tire size 35×12.50R17 and has figure 1 The basic structure illustrated and with figure 2 The tread pattern is based on the notch, and the presence or absence of the notch, the position of the notch, the shape of the notch, the type of elements other than the notch provided in each block, and the notch width Wc of the notch are relative to the tire width direction of the block. The ratio of the length Wb (Wc / Wb×100%), the ratio of the height H of the part with the largest notch depth from the groove bottom of the vertical groove to the maximum groove depth Dg of the vertical groove (H / Dg×100%), the tread surface of the block The ratio of the area of ​​the notch to the projected area of ​​the tread surface of the block, the ratio of the notch length Lc of the notch to the tire circumferential length Lb of the block (Lc / Lb×100), the amount of the bottom of the notch There were no 25 types of pneumatic tires of Conventional Example 1, Comparative Example 1, and Exa...

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Abstract

Provided is a pneumatic tire that is suitable as a tire for unpaved-road travel, and that has improved travel performance on unpaved roads and wear-resistant performance. Formed in a tread part 1 area plurality of longitudinal grooves 11 extending in a tire circumference direction, a plurality of transverse grooves 12 extending in a tire width direction, and a plurality of blocks 13 divided by the longitudinal grooves 11 and the transverse grooves 12. Cut-away parts 20 are formed in each of the longitudinal groove 11-facing portions of a pair of blocks 13 that are adjacent on either side of any longitudinal groove 11. The cut-away parts 20 are caused to face each other across the longitudinal groove 11. The cut-away width Wc and cut-away depth Dc of the cut-away parts 20 are greater toward the center along the extension direction of the longitudinal groove 11 than toward the outer side along the extension 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, relates to a pneumatic tire with improved running performance and wear resistance on unpaved roads. Background technique [0002] Pneumatic tires used for driving on unpaved roads such as uneven ground, muddy ground, snowy roads, sandy ground, and rocky ground are generally used. Large area tread pattern. In such tires, mud, snow, sand, stones, rocks, etc. (hereinafter, these are collectively referred to as "mud, etc.") on the road surface are bitten to obtain traction performance, and mud and the like are prevented from clogging in grooves, thereby improving The driving performance on unpaved roads is improved (for example, refer to Patent Document 1). [0003] However, in such a tire, since the groove area is set to be large in order to sufficiently bite into mud or the like, or each block is provided with sipes in order to incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/12B60C2200/14B60C11/0306B60C2011/0358B60C11/1376B60C11/1392B60C2011/0341B60C2011/133B60C11/1307B60C11/125B60C2011/0362B60C2011/036B60C11/01B60C11/11B60C11/1204B60C11/1236B60C11/1259B60C11/1272B60C2011/1213
Inventor 吉田泰之
Owner THE YOKOHAMA RUBBER CO LTD
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