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Tire

A tire, tire width direction technology, applied in tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve problems such as the impact of block grounding performance, and achieve the effect of improving sports performance

Active Publication Date: 2015-12-09
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, in this prior art tire, it should be noted that the ground contact performance of the blocks is affected due to the ground contact-related load and deformation concentrated on the lands of the blocks.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0028] figure 1 is a plan view showing the tread pattern of the tire 1 of the first embodiment, which schematically shows a part of the tread portion 2 in the tire circumferential direction S. FIG.

[0029] As shown, the tread portion 2 of the tire 1 is formed symmetrically with respect to the center line CL in the tire width direction H. As shown in FIG. Also, the tire 1 includes a plurality of circumferential grooves 10 to 12 , a plurality of land portions 20 to 23 , and a plurality of widthwise grooves 13 and 14 formed on the tread portion 2 . Multiple ( figure 1 three) circumferential grooves 10 to 12 are main grooves extending in the tire circumferential direction S, and consist of the central circumferential groove 10 located on the center line CL and the central circumferential groove located in the tire width direction H Two outer circumferential grooves 11 and 12 on the outer side of the groove 10 are formed.

[0030] The tread portion 2 is partitioned in the tread...

no. 2 approach

[0082] Next, a tire of the second embodiment will be described. The tire of the second embodiment basically includes a configuration similar to that of the tire 1 of the first embodiment, and exerts effects similar to those of the tire 1 of the first embodiment. Regarding the tire of the second embodiment, the same configuration as that of the tire 1 is used in a configuration corresponding to that of the tire 1 of the first embodiment.

[0083] Figure 7 It is a plan view showing the tread pattern of the tire 51 according to the second embodiment, and schematically shows a part of the tread portion 52 in the tire circumferential direction S.

[0084] As shown, the tread portion 52 of the tire 51 is formed symmetrically with respect to the center line CL in the tire width direction H. As shown in FIG. Furthermore, the tire 51 includes a plurality of circumferential grooves 60 to 62 on the tread portion 52 , a plurality of widthwise grooves 63 and 64 , a plurality of land por...

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PUM

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Abstract

A tire is configured so as to improve the motion performance of the tire on a dry road surface and so as to improve the motion performance of the tire on a wet road surface by enhancing the water discharge performance of a land. A tire (1) has a land (20) formed on the tread (2). In a cross-section of the land (20) taken at least in the width direction (H) of the tire, the ground contact surface (30) of the land (20) has a convex shape in which curve sections (31-33) having predetermined curvatures (Rc, Re, Rm) are smoothly connected. If the curvature of the center curve section (31) which includes the center section (35) of the ground contact surface (30) is Rc, and the curvature of the end curve sections (32) which include the end sections (34) of the ground contact surface (30) is Re, the relationship of Rc < Re is satisfied. The curvature (Rm) of the curve sections (33) located between the center curve section (31) and the end curve sections (32) is within the range of Rc to Re.

Description

technical field [0001] The present invention relates to a tire provided with a land portion formed on a tread portion. Background technique [0002] In the tire provided with the land portion, the sport performance on a dry road surface is improved by increasing the contact area of ​​the land portion. Also, by suppressing local shear deformation of the tread rubber generated at the end of the land portion, slipping between the road surface and the tread rubber is reduced, and the sports performance of the tire is improved. In addition to this, by removing the water between the contact patch of the land portion and the road surface, the actual contact area of ​​the land portion is increased, and the sports performance of the tire on slippery road surfaces is improved. [0003] In order to effectively remove water on the ground contact surface, it is necessary to reliably drain water from the ground contact surface of the land portion to the lug grooves in addition to drainin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/11B60C11/04B60C11/13
CPCB60C11/1376B60C11/11B60C11/1369B60C11/0306B60C11/0332B60C11/1353B60C2011/1361
Inventor 小林史贵
Owner BRIDGESTONE CORP