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Pneumatic tire

A technology for pneumatic tires and tires, which is applied to heavy-duty tires, off-road vehicle tires, tire parts, etc. It can solve the problems of easy damage to the middle block, large groove area, and difficulty in ensuring block rigidity, so as to maintain block rigidity and improve durability. Damage resistance, the effect of improving traction performance

Active Publication Date: 2019-08-30
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, such tires have problems in that due to the large groove area, it is difficult to secure sufficient block rigidity, the block itself cannot be sufficiently scratch-resistant, and the block is easily chipped while running on an unpaved road.

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] Made a tire size LT265 / 70R17 with figure 1 The basic structure of the example and the figure 2 The tread pattern is the basic tone, and the angle θa of the first wall relative to the tire circumferential direction, the angle θb of the second wall relative to the tire width direction, the wall surface angles of the first wall and the second wall, and the length La of the first wall The ratio Lb / La to the length Lb of the second wall, the area of ​​the cutout relative to the ground contact area of ​​the central block, the angle of the connecting groove with respect to the tire width direction, the magnitude relationship between the length La of the first wall and the distance Db, the second The relationship between the wall length Lb and the distance Da, the inclination direction of the shoulder inclined groove, the wall angle of the shoulder block, the groove width change of the shoulder inclined groove, the position of the outer end of the groove bottom protrusion, and...

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Abstract

Provided is a pneumatic tire suitable for traveling unsealed roads and capable of maintaining high levels of both traveling performance on unsealed roads and resistance to block damage. Center blocksprovided in a center region of a tread 1 are arranged so as to form a pair sandwiching therebetween an inclined groove extending inclined relative to the tire circumferential direction. Each center block is extended so as to straddle the tire equator from one side of the tire equator to the other side. A notch comprising a first wall and a second wall connected in a V shape in the tread road surface is formed in each center block. The first wall is extended in the tread road surface at an angle of no more than + / -20 DEG relative to the tire circumferential direction and the second wall is extended at an angle of + / -10 DEG relative to the tire width direction. The wall surface angles for both the first wall and the second wall are made greater than the wall surface angle of the wall surfacehaving the notch provided therein.

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 achieving a high balance between running performance on unpaved roads and damage resistance to blocks. 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. Running performance on unpaved roads (for example, refer to Patent Document 1). [0003] However, such tires have the following problems: due to the large groove area, it is difficult to ensure sufficient block rigidity, the block itself cannot s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/12B60C11/13
CPCB60C2200/06B60C2200/14B60C13/02B60C2011/1361B60C11/0306B60C2011/0346B60C2011/0372B60C11/1236B60C11/12B60C11/1353B60C2011/0341B60C2011/1213B60C11/11B60C2011/0365B60C11/1263
Inventor 村田尚久
Owner THE YOKOHAMA RUBBER CO LTD
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