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pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, vehicle components, etc., and can solve problems such as tire shoulder wear and tear

Active Publication Date: 2020-10-20
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the rigidity of the shoulder land portion is eased by the shoulder grooves, this tendency becomes apparent, and there is a problem that the shoulder land portion wears out prematurely.

Method used

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Examples

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Effect test

Embodiment Construction

[0028] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

[0029] figure 1 It is a developed view of the tread portion 2 of the pneumatic tire (hereinafter, sometimes simply referred to as "tire") 1 of the present embodiment. The pneumatic tire 1 of the present embodiment is preferably used for passenger vehicles, for example.

[0030] Such as figure 1 As shown, the tread portion 2 of the tire 1 is provided with a pair of shoulder main grooves 3 and a center main groove 4 arranged therebetween.

[0031] Each shoulder main groove 3 continuously extends in the tire circumferential direction on each side of the tire equator line C and on the tread edge Te side. The shoulder main groove 3 of the present embodiment is, for example, linear along the tire circumferential direction. The shoulder main grooves 3 may also extend in a wave shape or a zigzag shape, for example.

[0032] "Tread end Te" is the tire axially outermost g...

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Abstract

The present invention provides a pneumatic tire capable of suppressing lateral sliding on snow and ice and improving the wear resistance of a shoulder land portion. The tread portion (2) is provided with shoulder main grooves (3) and center main grooves (4), thereby dividing a shoulder land portion (7) and a middle land portion (8). The ratio (W1 / W2) of the width (W1) of the shoulder land portion (7) to the width (W2) of the middle land portion (8) is 1.6 to 2.4. On the shoulder land portion (7), there are provided shoulder thin grooves (10) extending continuously in the tire circumferential direction with a smaller groove width than the shoulder main grooves (3) on the side of the shoulder main grooves (3). In the tread profile on the cross-section of the tire including the tire rotation axis in the normal state, the first camber amount (C1), which is the distance in the tire radial direction between the tire equator position and the tread end (Te), is the tire 5.3% to 6.5% of the surface ground width (TW).

Description

technical field [0001] The present invention relates to a pneumatic tire capable of suppressing lateral sliding on snow and ice and improving the wear resistance of a shoulder land portion. Background technique [0002] For example, Patent Document 1 below proposes a pneumatic tire in which shoulder thin grooves are provided on shoulder land portions. The pneumatic tire of Patent Document 1 is the same as the conventional tire, and the amount of camber in the tread profile is set to be as small as 5% or less of the tread contact width. The amount of camber is the distance between the tire equator position and the tread end The distance in the radial direction of the tire. Such a pneumatic tire of Patent Document 1 tends to have a large ground contact pressure acting on the shoulder land portion. Since the rigidity of the shoulder land portion is eased by the shoulder grooves, this tendency becomes conspicuous, and there is a problem that the shoulder land portion wears pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/12
CPCB60C11/12B60C11/0083B60C2011/0344B60C2011/0381B60C11/04B60C11/125B60C2011/0348B60C11/0332B60C2011/0353B60C2011/0355B60C2011/036B60C2011/0365B60C2011/0372
Inventor 大场亮
Owner SUMITOMO RUBBER IND LTD
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