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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., can solve the problems of easy damage and cutting resistance of the groove bottom, achieve good configuration, improve driving performance, and improve The effect of locking performance

Pending 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 tires, blocks are formed in the shoulder area and the sidewall area, but on the other hand, since the groove area is also increased in these areas, stones, rocks, and foreign objects on the road surface are easy to enter. Installed in the grooves in the shoulder area and sidewall area, the bottom of the groove is easily damaged (poor cut resistance)

Method used

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  • Pneumatic tire
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] 23 kinds of pneumatic tires of the following conventional example 1, comparative examples 1-2, and embodiments 1-20 were produced: the tire size was 35×12.50R17 and had figure 1 The basic structure of the example and the figure 2The tread pattern is the basic tone, and, regarding the structure of the sidewall region, the presence or absence of the stepped portion of the sidewall block, the presence or absence of the bottom raised portion in the sidewall groove, and the The ratio A / SH of the vertical distance A measured from the ground contact end position of the tread portion to the radial inner end of the sidewall block to the tire section height SH measured in the radial direction of the tire, and the distance between the reference plane of the sidewall block and the sidewall groove Protrusion amount H1 of the groove bottom, ratio of protrusion amount H2 of the step portion of the sidewall block from the groove bottom of the sidewall groove to the protrusion amount H...

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Abstract

Provided is a pneumatic tire that is suitable as a tire for traveling on an unpaved road and that allows improvement of traveling performance and cut resistance on the unpaved road. A pair of side blocks 21, which extend in the tire width direction and face each other with a side groove 22 interposed therebetween, are provided in side regions located on the outer sides in the tire width directionof shoulder regions of a tread portion 1. Repetition elements 20 each comprising the side groove 22 and the pair of side blocks 21 are arranged at an interval in the tire circumferential direction. Atread of each of the side blocks 21 is formed into a protrusion and recess shape that comprises a reference surface 21a located on the side groove 22 side and a step portion 21b which is located on the side opposite to the side groove 22 side and protrudes from the reference surface 21a. A bottom raising portion 22a, which protrudes from the groove bottom and couples the pair of side blocks 21, isprovided in the side groove 22.

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 cut 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 driving performance on unpaved roads. Especially in tires intended to run on rocky ground, blocks are also provided in the sidewall area on the outer side of the tire width direction than the shoulder a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C13/00B60C11/01B60C11/03
CPCB60C11/01B60C2011/013B60C2011/1361B60C11/0306B60C2011/0358B60C2011/0369B60C11/1369B60C11/1376B60C11/1392B60C2200/14B60C13/002B60C11/11B60C13/02
Inventor 吉田泰之
Owner THE YOKOHAMA RUBBER CO LTD
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