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Pneumatic tyre

A technology for pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc., and can solve problems such as insufficient rigidity of pattern blocks, insufficient handling stability on dry roads, and insufficient wear resistance , to achieve the effect of rigidity optimization

Active Publication Date: 2009-08-12
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such pneumatic tires for icy and snowy roads, excellent running performance on icy and snowy roads can be exhibited by setting the groove area large. Insufficient handling stability and wear resistance on dry roads

Method used

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  • Pneumatic tyre
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0051] Among the pneumatic tires for ice and snow roads with a tire size of 205 / 55R16, tires of Conventional Example and Examples 1 to 3 were produced, respectively, in which only the tread patterns were different.

[0052] In a conventional example, five main grooves extending in the tire circumferential direction and a plurality of lug grooves extending in the tire width direction are provided in the tread portion, and a plurality of rectangular blocks are defined by these main grooves and lug grooves. On the other hand, Example 1 has figure 1 The tread pattern shown, Example 2 has Figure 4 The tread pattern shown, Example 3 has Figure 5 Tread pattern shown. In Examples 1 to 3, the width of the first land portion was set to 56% of half the tread width in contact with the tread, the width of the second land portion was set to 27% of half the tread width in contact with the tread, and the ratio of the inclined groove to the The inclination angle in the tire circumferentia...

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Abstract

A pneumatic tire whose front and rear sides need to be oriented to specific directions when it is mounted on a vehicle. The tire has, on a tread section, a first groove extending in the circumferential direction of the tire, a second main groove extending in the circumferential direction of the tire, in a shoulder region that is closer to the inner side of a vehicle than the first groove, a third main groove extending in the circumferential direction of the tire, in a shoulder region that is closer to the outer side of the vehicle than the first main groove, and lug grooves extending from one shoulder side to the other shoulder side. The width of a first land section segmented between the first main groove and the second main groove is set greater than the width of a second land section segmented between the first main groove and the third main groove. Inclined grooves are formed in the first land section, and the grooves communicate with at least three lug grooves while inclining relative to the circumferential direction of the tire. One end of each inclined groove is opened in the lug grooves and the other end is ended in a block.

Description

technical field [0001] The present invention relates to a pneumatic tire suitable as a studless tire. More specifically, the present invention relates to a pneumatic tire capable of improving running performance on ice and snow roads and improving steering stability and wear resistance on dry roads. Background technique [0002] For pneumatic tires, it is generally difficult to balance the driving performance on ice and snow roads and the driving performance on dry roads. For example, in a pneumatic tire for icy and snowy roads, a plurality of main grooves extending in the tire circumferential direction and a plurality of lug grooves extending in the tire width direction are provided in the tread portion, and these main grooves and lug grooves divide a plurality of Blocks (for example, refer to Patent Document 1). In such pneumatic tires for icy and snowy roads, excellent running performance on icy and snowy roads can be exhibited by setting the groove area to a large size....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/04B60C11/12
CPCB60C2011/1213B60C11/0306B60C11/0304B60C11/12B60C2011/0374Y10S152/902
Inventor 岸添勇
Owner THE YOKOHAMA RUBBER CO LTD
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