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Pneumatic tire

A technology of pneumatic tires and tires, which is applied in the direction of off-road vehicle tires, tire parts, tire treads/tread patterns, etc., which can solve the problems of easy decline in wear resistance and improve block rigidity and partial wear resistance , well-balanced effect

Active Publication Date: 2020-03-24
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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  • Pneumatic tire
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] 27 kinds of pneumatic tires of the following conventional example 1, comparative example 1, and examples 1 to 25 were produced: the tire size was 35×12.50R17 and had figure 1 The basic structure of the example and the figure 2 The tread pattern is the keynote, and, regarding the platform, the number of blocks existing on the platform, the ratio of the raised height H1 of the platform to the maximum groove depth GD1 of the transverse groove (the ratio of the raised height), and the total The ratio of the area to the projected area of ​​the platform (the ratio of the area), whether it has a shape that protrudes to both sides of the tire circumferential direction relative to the block (the presence or absence of circumferential protrusion), whether there is a groove between the bottom of the transverse groove and the top of the platform The stepped structure with a step between the surfaces (the presence or absence of the stepped structure), the presence or absence of a V...

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Abstract

Provided is a pneumatic tire that is favorable for traveling on an unpaved road and shows improved traveling performance and anti-wear performance on an unpaved road. Of a plurality of blocks 13 formed in a tread portion, at least three blocks 13 that include an outermost block 13o located outermost in a tire width direction and are adjacent to each other in the tire width direction, and at leasttwo vertical grooves 11 located between these blocks 13, are arranged on a platform 15 that protrudes from a groove bottom of a horizontal groove 12, has a flat top surface, and projects to either side in a tire circumferential direction with respect to the at least three blocks 13, and a bottom raising portion 16 protruding from a groove bottom of the vertical groove 11 adjacent to the outermostblock 13o is provided on the groove bottom of the vertical groove 11, to connect the outermost block 13o to the block 13 adjacent to the outermost block 13o.

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 having improved running performance and wear resistance on unpaved roads. Background technique [0002] In the pneumatic tires used for driving on uneven ground, muddy ground, snow track, sandy ground, rocky ground and other unpaved roads, horizontal grooves (Japanese: rag grooves) and blocks with many edge components are generally used. Large tread pattern. In such tires, the traction performance is obtained by biting into mud, snow, sand, stones, rocks, etc. on the road surface (hereinafter, they are collectively referred to as "mud, etc."), and prevents mud, etc. from clogging in the grooves, thereby improving The driving performance on unpaved roads has been 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/13
CPCB60C11/03B60C11/13B60C11/1369B60C11/1376B60C2011/1361B60C11/1353B60C11/0306B60C2011/0341B60C2011/0358B60C2200/14B60C11/0309B60C11/11B60C2011/0372B60C2011/1338
Inventor 吉田泰之
Owner THE YOKOHAMA RUBBER CO LTD
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