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Pneumatic tire

一种充气轮胎、轮胎的技术，应用在充气轮胎的增强层、轮胎零部件、轮胎胎面/胎面花纹等方向，达到改善冰地性能、良好冰地性能、优异旋转性能的效果

Inactive Publication Date: 2013-03-06
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Contents of the invention

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
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Effect test

example

[0049] The tires of Examples 1 to 9 were produced, the tire size was 205 / 55R16, and they were provided with an annular tread portion extending in the tire circumferential direction, a pair of sidewall portions disposed on both sides of the tread portion, and a pair of sidewall portions disposed on these sidewall portions. A pair of bead portions on the inner side in the tire radial direction of the portion, wherein, such as figure 1 As shown, a plurality of drainage grooves composed of circumferential grooves are provided on the tread portion, and the land portion is divided by these drainage grooves. At the same time, a plurality of annular thin grooves are arranged concentrically on the land portion. The starting point of the thin grooves is The rotation angle to the end point is more than 90° and less than 360°, so that at least one end of these thin grooves opens to a common drainage groove, and according to Table 1, make the rotation angle of the thin grooves, the presence...

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Abstract

In a pneumatic tire including a tread portion (1), side wall portions (2), and bead portions (3), a plurality of drainage grooves formed from circumferential grooves or width direction grooves is provided in the tread portion (1). The drainage grooves (11) partition land portions (12). A plurality of loop-shaped narrow grooves (13) formed so that a pivot angle from a starting point to a terminating point is not less than 90 DEG and less than 360 DEG is concentrically disposed in the land portions (12). At least one end of the narrow grooves (13) is open to a common drainage groove (11). The present invention provides the pneumatic tire which can improve the braking performance and rotation performance on ice ground.

Description

technical field [0001] The present invention relates to a pneumatic tire in which a plurality of annular thin grooves are arranged concentrically on a tread portion, and more specifically, to a pneumatic tire capable of improving braking performance and rotation performance on ice. Background technique [0002] Conventionally, in pneumatic tires expected to run on ice, many drainage grooves or sipes are provided in the tread portion, and the performance on ice is improved by the edge effects of these drainage grooves or sipes. In particular, the tire width direction edge component that resists tire circumferential slip contributes to improvement of braking performance on ice, and the tire circumferential edge component that resists tire width direction slip contributes to improvement of ice spin performance. [0003] In view of this insight, in order to diversify the extension direction of the tread edge components and improve the braking performance and rotation performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C9/02
CPCB60C2011/129B60C11/1204B60C2011/0388B60C11/03B60C2011/1254B60C2011/039B60C2011/0386B60C11/1222B60C11/1272B60C2011/1227B60C11/12B60C11/0306B60C11/1259Y10S152/03
Inventor 甲田启
Owner THE YOKOHAMA RUBBER CO LTD