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Pneumatic tire

A technology for pneumatic tires and tires, which is applied in the direction of pneumatic tires, tire parts, tire treads/tread patterns, etc., can solve the problems of handling stability and quietness reduction, and achieve the purpose of suppressing the reduction of rigidity, improving grip, and suppressing Easy to clog effect

Inactive Publication Date: 2012-06-20
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in this pneumatic tire, the steering stability and quietness when running on a dry road may be reduced.

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

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Embodiment Construction

[0024] Below, refer to the appendix Figures 1 to 3 An embodiment of the pneumatic tire of the present invention will be described. A plurality of circumferential main grooves 11 extending in the tire circumferential direction R are formed on a tread portion 10a of the pneumatic tire 10 at intervals along the tire width direction H, and a plurality of land portion rows 14 are defined by these circumferential main grooves 11 .

[0025] In the example shown in the figure, three circumferential main grooves 11 are formed, one of which is arranged so that its widthwise center portion is located on the tire equator portion CL, and the other two are arranged from the tire equator portion CL to the vehicle outer side X and the vehicle inner side Y, respectively. Separate the positions at equal distances. As a result, the plurality of land portion rows 14 are arranged at four positions away from the tire equator portion CL on the tread surface portion 10a. Specifically, two of the ...

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Abstract

A pneumatic tire 10 in which a plurality of circumferential main grooves 11 that extend in the tire circumferential direction are formed in a tread surface portion, and a plurality of land portion rows 14 are partitioned by the circumferential main grooves 11, in which in at least one of the plurality of the land portion rows 14a circumferential auxiliary groove 15 extending in the tire circumferential direction and having a narrower width and shallower depth than those of the circumferential main grooves 11 is formed in a position avoiding the tire centerline CL, and among both side faces 15a and 15b defining the circumferential auxiliary groove 15, one side face on the tire centerline side extends along the normal direction of the tread surface portion or is inclined to the tire centerline side by 5 DEG or less with respect to the normal direction, and the other side face on the side opposite to the tire centerline side is inclined to the side opposite to the tire centerline side by 10 DEG to 30 DEG with respect to the normal direction. In accordance with the present invention, it is possible to improve the turning performance on snowy roads without decreasing the steering stability or quietness during travel on a dry road surface.

Description

technical field [0001] The present invention relates to a pneumatic tire. [0002] This application claims priority based on Japanese Patent Application No. 2007-36266 filed in Japan on February 16, 2007, the content of which is incorporated herein by reference. Background technique [0003] Conventionally, in order to improve the running performance on icy and snowy road surfaces, various methods such as those shown in the following Patent Document 1 have been proposed. In recent years, in order to improve the cornering performance that suppresses the side-slip of the pneumatic tire during cornering, among various running performances on icy and snowy roads, for example, it has been studied to increase the width and depth of the circumferential main groove formed in the upper part of the tread surface. Size or number of strips to reduce the ground contact area of ​​the tread portion or to reduce the rigidity of the row of land portions formed on the tread portion. [0004...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/04B60C5/00B60C11/13
CPCB60C11/0309B60C11/12B60C11/1323B60C11/0306
Inventor 永井仁
Owner BRIDGESTONE CORP
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