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Pneumatic tire

A technology for pneumatic tires and tires, applied in tire parts, tire treads/tread patterns, transportation and packaging, etc., can solve the problems of reduced handling stability on dry roads, easy to reduce rigidity of land parts, etc., to prevent rigidity from reducing. , improve driving performance, improve the effect of friction

Active Publication Date: 2013-05-01
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned pneumatic tire, there is a problem that the rigidity of the land portion tends to decrease due to the plurality of sipes, which further reduces the steering stability on a dry road surface.

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0069] Based on the specifications in Table 1, a trial-manufactured form has figure 1 Pneumatic tires with tread pattern and tire size 225 / 65R17. like Figure 5 As shown, the crown land portion of the test tire is provided with a sipe group 18, and the sipe group 18 is configured with five sipe patterns 17, and the angle of the lowermost sipe pattern relative to the tire axial direction is set to For θ3, a and b are the tire circumferential distances between one end and the other end of adjacent sipes. The braking performance on ice and the handling and stability performance on dry road surface of each test tire were tested. In addition, for comparison, the land portion edge of the crown land portion was formed in a linear shape along the tire circumferential direction, and the tire (Comparative Example 1) in which all sipes were provided parallel to the tire axial direction was also tested in the same manner. test. The test method is as follows.

[0070]

[0071] Insta...

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Abstract

The present invention provides a pneumatic tire which can keep control stability on dry road and improve driving performance on snowy road and ice. The pneumatic tire is provided with a landing part on a tread part (2), wherein the landing part extends in a circumferential direction of the tire. The landing part is provided with a sawteeth edge (14) which comprises a circumferential sheet (12) and an axial sheet (13). The landing part is provided with a cutter groove pattern set (18) which is obtained through nearly arranging more than three semi-open cutter groove patterns (17) which do not intersect with one another. One end of each cutter groove pattern (17) is open at the landing part edge (11), and the other end forms a terminal in the landing part. The distance between adjacent cutter groove patterns (17) in the cutter groove pattern set (18) in the circumferential direction of the tire gradually reduces from one end to the other end.

Description

technical field [0001] The present invention relates to a pneumatic tire capable of maintaining steering stability on a dry road surface and improving running performance on icy and snowy roads. Background technique [0002] Conventionally, there are known pneumatic tires in which edge components are increased by providing sipes extending parallel to each other in land portions of a tread portion in order to improve running performance on icy and snowy roads. As related technologies, there are the following Patent Documents 1 and 2. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2006-51891 [0004] Patent Document 2: Japanese Patent Laid-Open No. 2006-160107 [0005] However, in the above-mentioned pneumatic tire, there is a problem that the rigidity of the land portion tends to be lowered due to the plurality of sipes, and the steering stability on a dry road surface is lowered. Contents of the invention [0006] The present invention has been made in view o...

Claims

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Application Information

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IPC IPC(8): B60C11/12
CPCB60C11/1236B60C11/04B60C11/12
Inventor 川内保范
Owner SUMITOMO RUBBER IND LTD