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Pneumatic tire

A technology for pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc. It can solve the problems of partial wear of block patterns and partial wear of block patterns in the shoulder area, and achieve Effects of improving partial wear, suppressing collapse, and improving braking performance

Active Publication Date: 2011-06-01
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, if a plurality of sipes are formed on the tread, the problem that partial wear (heel and toe wear) tends to occur on the blocks is unavoidable, especially with tires that are prone to high loads when cornering. Partial wear on the blocks in the shoulder area

Method used

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Examples

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Embodiment

[0052] Make separately figure 1 Inventive tires 1 and 2 (Examples 1, 2), Inventive tires 3 (Example 3), reference tires (reference example), and comparative tires (comparative examples) of the structure shown were used as test tires, in which the tires The size is set to 225 / 65R17; the tires 1 and 2 of the present invention are configured as ribbed patterns on the tire equatorial plane figure 2 Sipes formed in blocks in the shoulder area image 3 As shown in Table 1, the sipe spacing of the ribbed pattern and the sipe spacing of the block pattern are set as shown in Table 1. The tire 3 of the present invention is in addition to Figure 4 As shown, a pair of left and right sipe portions (the tire width direction length Lw of the separated portion is 14% of the sipe width direction length Ls) constitutes the rib pattern on the tire equatorial plane and the block shape of the shoulder area Except for the sipes of the pattern, it has the same structure as the tire 2 of the present i...

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Abstract

Provided is a pneumatic tire which can improve the braking performance on ice and the partial-wear resistance. Sipes (11X) provided in a rib (5) on the tire equatorial plane (TE) are arranged in a three-dimensional shape where the amount of collapse of the rib (5) by the external force becomes smaller in one rotational direction of the tire than in the other rotational direction of the tire. In the block (10) of a shoulder region (1S), the sipes (11Ma) on the block tread-in side (10A) have a three-dimensional shape where the amount of collapse of the block by the external force when the sipes(11Ma) are provided entirely in the block (10) becomes smaller in one rotational direction of the tire than in the other rotational direction of the tire, and the sipes (11Mb) on the block kick-out side (10B) have a three-dimensional shape where the amount of collapse of the block by the external force when the sipes (11Mb) are provided entirely in the block (10) becomes smaller in the other rotational direction of the tire than in one rotational direction of the tire.

Description

Technical field [0001] The present invention relates to a pneumatic tire used on icy and snowy roads, and more specifically, to a pneumatic tire with improved braking performance and uneven wear resistance on ice. Background technique [0002] Conventionally, pneumatic tires used on icy and snowy roads are provided with a plurality of sipes extending in the tire width direction on a tread formed with a block-based tread pattern, and the edge effect ensures good performance on ice. Furthermore, by setting the shape of the sipe into a three-dimensional shape, the collapse of the block pattern is suppressed, thereby ensuring a large contact area on an ice and snow road, and further improving performance on ice (for example, refer to Patent Document 1). [0003] However, if multiple sipes are formed on the tread, uneven wear (wear of the tire heel and toe) is unavoidable on the block pattern, especially for tires that tend to load higher loads when turning. The block pattern in the sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/12B60C11/01B60C11/11
CPCB60C2011/1213B60C2011/0388B60C2011/1295B60C2011/1254B60C11/0302B60C2011/1227B60C11/1218B60C11/12
Inventor 山川贵弘
Owner THE YOKOHAMA RUBBER CO LTD
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