Pneumatic tire

A technology of pneumatic tires and tires, applied in the direction of heavy tires, off-road vehicle tires, tire parts, etc., to achieve the effect of improving driving performance, improving traction performance, and improving discharge performance

Active Publication Date: 2019-09-06
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even with such tires, it cannot be said that sufficient running performance on unpaved roads (particularly, traction performance and starting performance) can be obtained, and further improvement is required.

Method used

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  • Pneumatic tire
  • Pneumatic tire
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] The tire size is LT265 / 70R17 and has figure 1 The basic structure of the example is based on 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, and the structure of the inclined groove (the presence or absence of the see-through part, the expansion part, and the expansion part ), the ratio of the width SW of the see-through area to the tread width TW (SW / TW×100%), the ratio of the width W1 of the see-through part to the width W3 of the widening part W3 / W1, the connecting part of the wall surface of the central block The angle α with respect to the see-through part, the inclination angle β of the see-through part with respect to the tire equator, and the angle of the connecting groove are set as shown in Tables 1 and 2 respectively. Conventional Example 1, Comparative Examples 1 to 5, and Examples 1 to 14 These 20 types of pne...

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Abstract

Provided is a pneumatic tire that is suitable for use as a tire for traveling on unpaved roads and that improves traveling performance on unpaved roads. Center blocks 10, which are provided in a center region of a tread section 1, are arrayed so as to form a pair of center blocks 10 between which there are interposed inclined grooves 30 that extend in an inclined direction with respect to a tire circumferential direction. The center blocks 10 are made to extend so as to straddle a tire equator CL from one side to the other side of the tire equator CL. Notches 11, which are each composed of a first wall 11a and a second wall 11b connected to each other in a V shape, are provided in treads in each center block CL. The first walls 11a are made to extend at an angle within + / -20 degrees with respect to the tire circumferential direction. The second walls 11b are made to extend at an angle of + / -10 degrees with respect to a tire width direction. Inclined grooves 20 are each constituted by asee-through portion 21 and an expanded portion 22 having a larger groove width than the see-through portion 21. A width SW of a see-through region S that can extend without intersecting an extensionline of the see-through portion 21 is made to be equal to or greater than 30% of a tread width TW.

Description

Technical field [0001] The present invention relates to a pneumatic tire suitable as a tire for running on an unpaved road, and more specifically, relates to a pneumatic tire having improved running performance on an unpaved road. Background technique [0002] Pneumatic tires used on unpaved roads such as uneven ground, muddy ground, snowy roads, sandy ground, rocky ground, etc., generally use horizontal grooves (Japanese: ラグ沟) with many edges, blocks as the main body and grooves. Large tread pattern. In such tires, mud, snow, sand, rocks, rocks, etc. (hereinafter, collectively referred to as "mud, etc.") on the road surface are bitten to obtain traction performance, and mud etc. are prevented from being clogged in the groove, thereby improving Driving performance on unpaved roads (for example, refer to Patent Document 1). However, even with such tires, it cannot be said that the running performance (especially traction performance and starting performance) on unpaved roads can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/13
CPCB60C2011/133B60C2200/06B60C2200/14B60C11/0309B60C11/033B60C11/1236B60C2011/0383B60C11/11B60C11/13
Inventor 铃木勇平
Owner THE YOKOHAMA RUBBER CO LTD
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