Pneumatic tire

A technology of pneumatic tires and tires, applied in tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve problems such as shoulder and land wear, and achieve improved wear resistance and excellent wear resistance. Sexuality, the effect of preventing lateral sliding

Active Publication Date: 2017-09-26
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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  • Pneumatic tire
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Examples

Experimental program
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Effect test

Embodiment Construction

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

[0029] figure 1 It is a development 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 cars, 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 central main groove 4 arranged between them.

[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 end Te side. The shoulder main groove 3 of the present embodiment has, for example, a linear shape along the tire circumferential direction. The shoulder main groove 3 may extend in a wave shape or a zigzag shape, for example.

[0032] "Tread end Te" is the outermost ground contact position i...

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Abstract

To provide a pneumatic tire that can improve wear resistance of shoulder land portions while suppressing sideslip on snow and ice. By providing shoulder main grooves 3 and a center main groove 4 in a tread part 2, the tread part 2 is divided into shoulder land portions 7 and middle land portions 8. A ratio (W1 / W2) of a width (W1) of each of the shoulder land portions 7 to a width (W2) of each of the middle land portions 8 is 1.6 - 2.4. In each of the shoulder land portions 7, on a shoulder main groove 3 side, a shoulder narrow groove 10 that continuously extends in a tire circumferential direction with a groove width smaller than that of each of the shoulder main grooves 3 is provided. A first camber amount (C1), which is a tire radial direction distance between a tire equator position and a tread edge (Te) in a tread profile in a tire cross section that includes a tire rotation axis in a normal state, is 5.3% - 6.5% of a tread ground contact width (TW).

Description

Technical field [0001] The present invention relates to a pneumatic tire capable of suppressing lateral sliding on ice and snow and improving the wear resistance of the shoulder and land portion. Background technique [0002] For example, Patent Document 1 below proposes a pneumatic tire in which shoulder grooves are provided in the shoulder land portion. The pneumatic tire of Patent Document 1 is the same as the conventional tires. The amount of camber in the tread profile is set to be as small as 5% or less of the tread width. The amount of camber is the difference between the tire equatorial position and the tread edge. The radial distance between the tires. Such a pneumatic tire of Patent Document 1 tends to act on the shoulder land portion with a large ground pressure acting on the shoulder land portion. Since the shoulder grooves relax the rigidity of the shoulder land portion, this tendency becomes obvious, and there is a problem of early wear of the shoulder land portio...

Claims

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Application Information

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Patent Type & Authority Applications(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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