Tire

A tire and tire circumferential technology, applied to tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve the problems of lower land ratio and lower driving performance on dry roads, and prevent the reduction of ground contact area Small, the effect of improving driving performance

Active Publication Date: 2017-03-01
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the tire of the above-mentioned Patent Document 1 has a problem that the running performance on a dry road surface is greatly reduced due to a reduction in the land ratio due to the chamfered portion.

Method used

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Examples

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Embodiment Construction

[0038] Hereinafter, one embodiment of the present invention will be described based on the drawings.

[0039] figure 1 It is a developed view showing an example of the tread portion 2 of the tire 1 according to the present embodiment. figure 2 yes figure 1 A1-A1 sectional view. The tire 1 of the present embodiment is preferably used as a radial tire for passenger cars, for example.

[0040] A left-right asymmetrical tread pattern is formed on the tread portion 2 in which the direction of installation to a vehicle is specified. On the sidewall portion of the tire 1, etc., the direction of installation to the vehicle is clearly indicated by characters (for example, “INSIDE” and / or “OUTSIDE”) or the like (illustration omitted).

[0041]The tread part 2 is provided with: a pair of central main grooves 3A, 3B which are continuous along the tire circumferential direction; The interval extends continuously along the tire circumferential direction. Thus, the tread portion 2 is ...

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PUM

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Abstract

The present invention relates to a tire which is capable of taking into account snow running and running performance on a dry road surface.A tire comprises a tread portion provided with a first crown main groove (3A) continuous in the tire circumferential direction, a second crown main groove (3B) continuous in the tire circumferential direction, and a center land zone (6) defined therebetween. The center land zone (6) is provided with first center lug grooves (11) extending from the first crown main groove and terminating within the center land zone. Between the adjacent first center lug grooves (11, 11), a first corner portion (13a), which is formed between a ground contacting surface of the center land zone (6) and a groove wall (3AW) of the inboard first crown main groove, is provided with a first part (21a) and a second part (22a) which are arranged in the tire circumferential direction, wherein the first portion is chamfered, and the second part (22a) is not chamfered or less chamfered than the first part.

Description

technical field [0001] The present invention relates to a tire capable of achieving both running performance on snowy roads and dry roads. Background technique [0002] Patent Document 1 below proposes a tire in which a plurality of main grooves extending continuously in the tire circumferential direction are provided in a tread portion. The land portion divided between the main grooves is provided with a plurality of lateral grooves extending from the main grooves and forming terminations in the land portion. This type of tire compacts and shears snow by using the main grooves and the lug grooves, thereby exhibiting driving performance on snowy roads. [0003] In addition, a plurality of chamfered portions are provided in the corner portion between the ground contact surface of the tread portion and the groove wall of the main groove in the land portion, and these chamfered portions are continuous between a pair of lug grooves adjacent in the tire circumferential direction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/13
CPCB60C11/0306B60C11/1369B60C11/1392B60C2011/0358B60C2011/0388B60C2011/133B60C11/1384B60C2011/1209B60C2011/0341B60C2011/0369B60C2011/0383B60C2011/0372B60C11/0304B60C11/1236B60C2011/0365B60C2011/0353B60C2011/0355B60C2011/0367
Inventor 兼松义明
Owner SUMITOMO RUBBER IND LTD
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