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Pneumatic tire

A technology of pneumatic tires and tires, applied in tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve the problems of partial wear and slow wear, and achieve the effect of partial wear improvement

Inactive Publication Date: 2007-11-14
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is a problem that, when such a tire is used for loop running, the edge portion on the kick-out side of the block will wear out more slowly than the edge portion on the rolling-in side.

Method used

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  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Set the tire size to 235 / 45ZR17 to be the same, set the tread pattern to be the same as shown in Figure 1, and create the inclination angle α of the side groove wall surface in the tire rotation direction of the block in the shoulder area and the side groove wall surface in the tire counter rotation direction. The relationship of the inclination angle β is set to β>α, and the tire of the present invention in which the side edge in the tire rotation direction is chamfered into an arc shape, and a comparative tire in which the tire of the present invention is not chamfered at the side edge in the tire rotation direction, And the conventional tire in which the inclination angle α is greater than the inclination angle β among the comparative tires.

[0036] In the tire of the present invention, the inclination angle α is 0.30×tan -1 (W / 2D), the tilt angle β is 0.85×tan -1 (W / 2D), the radius of curvature r of the chamfered surface is 3mm. The inclination angles α and β of conven...

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Abstract

A tread surface the tire rotational direction of which is specified in one direction has a center region and shoulder regions on both sides of the center region. Blocks are defined in at least one of the shoulder regions by at least one first circumferential groove which extends in a circumferential direction of the tire, and first lateral grooves which extend in a widthwise direction of the tire and are disposed at predetermined intervals in the tire circumferential direction. Each block includes a tire rotational direction side groove wall surface having an inclination angle alpha , and a tire reverse rotation direction side groove wall surface having an inclination angle beta , and the inclination angle beta is greater than the inclination angle alpha . Each block has a tire rotational direction side edge portion which is chamfered.

Description

Technical field [0001] The present invention relates to a pneumatic tire, and more specifically, to a pneumatic tire that is intended to improve uneven wear that occurs in loop driving and the like in which lateral acceleration is large during cornering. Background technique [0002] In the past, various proposals have been made for pneumatic tires having a directional tread pattern that designates a rotation direction as one direction on the tread. Among the pneumatic tires with such a directional tread pattern, there is a pneumatic tire as described below, which is defined by a circumferential groove extending in the tire circumferential direction and a circumferential groove extending in the tire circumferential direction in the shoulder area of ​​the tread. The transverse grooves extending in the tire width direction arranged at intervals are divided into blocks (for example, refer to JP 11-91313 A). [0003] However, in recent years, the loop track has also been opened to ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/13B60C11/11B60C11/03B60C11/04
CPCB60C11/13B60C11/0316B60C11/0302B60C11/1384B60C11/04B60C11/11
Inventor 山根贤司
Owner THE YOKOHAMA RUBBER CO LTD
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