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Pneumatic tire

A technology of pneumatic tires and tires, which is applied to off-road vehicle tires, tire parts, tire treads/tread patterns, etc. Effect

Active Publication Date: 2019-09-03
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in such a tire, there is a problem that the groove area is set to be large in order to sufficiently bite into mud and the like, and the sipe is provided in each block to increase the edge component, so the rigidity of the block tends to decrease, making it difficult to Improvement of running performance on unpaved roads (especially, traction performance and starting performance) and securing of damage resistance of blocks are highly considered

Method used

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Examples

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Embodiment

[0050] The tire size is LT265 / 70R17, with figure 1 The illustrated basic structure, with figure 2 Taking the tread pattern as a reference, 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 average of the respective sipe patterns of the first region, the second region and the third region The angle, the presence or absence of the bending portion of each sipe, the presence or absence of communication with the end groove and / or notch and / or shallow groove, the presence or absence of variation in groove depth, and the angle of the bending portion are shown in Table 1. 18 kinds of pneumatic tires of Comparative Examples 1 to 5 and Examples 1 to 12 set as in 1 and 2.

[0051] In Tables 1 and 2, "sipe 1" means, in figure 2 In the tread pattern of , the sipe is arranged on the tire equator side among the pair of sipe formed in the central block, and "sipe 2" means, in figur...

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Abstract

The present invention provides a pneumatic tire that is suitable for use as a tire for traveling on unpaved roads, and that improves traveling performance and damage resistance 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; andthe average angle of sipes, which are respectively formed in the center blocks 10 and shoulder blocks 20, lies within 90 degrees + / -10 degrees in a first region C, lies within 130 degrees + / -10 degrees in a second region M, and lies within 70 degrees + / -10 degrees in a third region S with respect to the tire equator CL. Each sipe is configured to have at least one curved portion.

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 damage resistance on unpaved roads. Background technique [0002] Pneumatic tires used for driving on uneven, muddy, snowy, sandy, rocky, and other non-paved roads generally use tires whose tread pattern is mainly composed of horizontal grooves and / or blocks with many edge components. Pneumatic tires with large surface pattern and groove area. In such tires, traction performance is obtained by biting into mud, snow, sand, stones, rocks, etc. (hereinafter, these are collectively referred to as "mud, etc.") The running performance on non-paved roads has been improved (for example, refer to Patent Document 1). [0003] However, in such a tire, there is a problem that the groove area is set to be large in order to sufficiently bite into mud and the like, and the sipe is provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/01B60C11/12
CPCB60C11/01B60C11/11B60C2011/0346B60C2011/0372B60C2200/14B60C11/1236B60C11/1263B60C11/1392
Inventor 铃木勇平
Owner THE YOKOHAMA RUBBER CO LTD
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