Pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc. It can solve the problems of not necessarily sufficient durability, not necessarily significant durability effects, and increased ground pressure, etc. problem, achieve high performance on ice and improve durability

Inactive Publication Date: 2011-07-13
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, for the former, the effect of improving durability is not necessarily significant because the blocks are made smaller by providing intersecting sipes.
In addition, for the latter, although there are countermeasures for durability, since blocks of different heights are formed, the contact pressure of the high block increases, so there is a problem that wear is likely to occur, so the durability of the latter is also limited. not necessarily sufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] The specifications of the manufactured tires are 225 / 65R17 101Q, all of which have figure 1 The tread patterns shown are conventional examples 1 and 2 and tires of examples 1 to 3 having different forms as shown in Table 1.

[0047] In Conventional Example 1, the sipes had the same depth and were open sipes, the sipe was not divided and the block consisted of only one layer of rubber composition. In Conventional Example 2, only the sipe depths were shifted, and all were undivided sipes, and the blocks consisted of only one layer of the rubber composition. Example 1 is an example in which open sipes and closed sipes are alternately arranged, and the open sipe is shifted shallower than the closed sipe, and this example corresponds to image 3 . Embodiment 2 is an embodiment in which the sipe is divided on the basis of Embodiment 1, and this embodiment corresponds to Figure 4 . Example 3 is an example with a two-layer structure in which the block is formed into a rubb...

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Abstract

The present invention provides a pneumatic tire simultaneously achieving both enhanced on-ice performance and enhanced durability. The pneumatic tire, wherein sipes (6) extending in the width direction of the tire are arranged at intervals in the circumferential direction of the tire in shoulder blocks (5a) divided by longitudinal grooves (2) extending at least in the circumferential direction and by lateral grooves (3) extending in the width direction. Open sipes (6a) and closed sipes (6b) are alternately arranged, and the depth of the open sipes (6a) is less than the depth of the closed sipes (6b).

Description

technical field [0001] The present invention relates to a pneumatic tire, and more specifically, to a pneumatic tire having a block row at least less than a shoulder portion, and a plurality of sipes extending in the tire width direction are provided on the block, without damage to the tire. A pneumatic tire that improves durability while performing on ice. Background technique [0002] In general, blocks are used for the tread pattern of winter tires (studless tires). The blocks allow snow to be easily packed between adjacent blocks in the tire circumferential direction, thereby improving on-snow performance. In addition, by providing the block with a sipe along the tire width direction, it is possible to improve the braking performance on icy roads (performance on ice) due to the water film removal effect and the edge effect. [0003] Among them, in order to further improve the on-ice performance, as a countermeasure, the number of sipes in the circumferential direction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/12B60C11/00B60C11/01
CPCB60C11/0302Y10S152/03B60C2011/1268B60C2011/0388B60C2011/1209B60C11/005B60C11/12B60C11/0306B60C2011/1254B60C2011/1213B60C2011/0025B60C11/03
Inventor 山川贵弘
Owner THE YOKOHAMA RUBBER CO LTD
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