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Pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, vehicle components, etc., and can solve the problem of difficulty in balancing driving stability and snow performance, reduced driving stability on dry roads, and rigidity of the surrounding bank Reduce the problems such as improving moisture resistance and snow performance, maintaining driving stability, and increasing edge components

Active Publication Date: 2021-04-09
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]However, when lug grooves having curved portions are provided on the land portion of the tread portion, there is a reduction in the rigidity of the land portion, which leads to driving on dry roads. Issues with reduced stability
Therefore, it is difficult to balance driving stability on dry roads and performance on snow

Method used

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  • Pneumatic tire
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Examples

Experimental program
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Effect test

Embodiment

[0047]The tires of Conventional Example, Comparative Examples 1 to 3, and Examples 1 to 5 were manufactured in the following manner, the tire size was 235 / 55R19, the In a pneumatic tire with a pair of sidewall portions on both sides and a pair of bead portions provided on the inner side in the tire radial direction of such sidewall portions, in the tread portion is formed a tire extending in the tire circumferential direction on both sides of the tire equator line. A pair of inner main grooves and a pair of outer main grooves extending in the tire circumferential direction outside the inner main grooves, the central land portion is divided between the pair of inner main grooves, and the middle land portion is divided between the inner main grooves and the inner main grooves. Between the outer main grooves, the shoulder land is divided on the outer side of the outer main groove, and a plurality of sipes are formed in the central land, and a plurality of sipes and a plurality of ...

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Abstract

Provided is a pneumatic tire in which steering stability on a dry road surface is maintained and snow performance can be improved. In this pneumatic tire, a pair of inner main grooves 11 and a pair of outer main grooves 12 are formed in a tread portion 1, a center land portion 21 is formed between the two inner main grooves 11, intermediate land portions 22 are sectioned between the inner main grooves 11 and the outer main grooves 12, shoulder land portions 23 are sectioned on the outer sides of the outer main grooves 12, a plurality of sipes 31-33 having three-dimensional shapes are formed in the land portions 21-23, a plurality of lug grooves 42 each having a bent part are formed in the intermediate land portions 22, one end of each of the lug grooves 42 having a bent part opens into an outer main groove 12 while the other end terminates within an intermediate land portion 22, the groove width W1 of the inner main grooves 11 is in a range of 28% to 33% relative to both the width WL1 of the center land portion 21 and the width WL2 of the intermediate land portions 22, and the groove width W2 of the outer main grooves 12 is in a range of 28% to 33% relative to both the width WL1 of the center land portion 21 and the width WL2 of the intermediate land portions 22.

Description

technical field [0001] The present invention relates to a pneumatic tire suitable as an all-season tire, and more particularly, to a pneumatic tire capable of maintaining good driving stability on dry roads and improving snow performance. Background technique [0002] For all-season tires, excellent snow performance is required in snow conditions. Therefore, in a conventional all-season tire, a plurality of main grooves extending in the tire circumferential direction are provided on the tread portion, and a plurality of sipes or lateral grooves extending in the tire width direction are provided on the land portion divided by these main grooves. The grooves are such that traction on snow is ensured based on such sipe or lug grooves (for example, refer to Patent Documents 1 to 2). [0003] In addition, it is proposed to form a plurality of lug grooves having curved portions on the land portion of the tread portion, and to diversify the extending directions of the edge compone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/12B60C11/13
CPCB60C11/0306B60C2011/0388B60C2011/0381B60C2011/1213B60C2011/0374B60C2011/0372B60C2011/0395B60C2011/0353B60C11/1218
Inventor 长桥祐辉
Owner THE YOKOHAMA RUBBER CO LTD
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