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tire

A tire and tire circumferential technology, applied in tire parts, tire tread/tread pattern, vehicle parts, etc., can solve the problems of deterioration of heel and toe wear, deterioration of tire wear life, etc. The effect of improving the anti-stone performance

Active Publication Date: 2021-01-22
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, since the rigidity of the tread portion decreases, there is a problem that the wear life of the tire deteriorates.
In particular, on the land portion on the axially outer side of the tire having a smaller tire outer diameter than the tire equator, since the slip of the land portion increases, for example, heel toe wear tends to deteriorate.

Method used

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Embodiment Construction

[0029] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

[0030] figure 1 A developed view showing the tread portion 2 of the tire 1 according to one embodiment of the present invention is shown. The tire 1 of the present embodiment can be used in various types of tires, such as pneumatic tires for passenger cars and heavy loads, and non-pneumatic tires in which pressurized air is not filled inside the tire. The tire 1 of the present embodiment is preferably used as a pneumatic tire for heavy loads.

[0031] In the tread portion 2 of the present embodiment, a pair of crown main grooves 3 and 3 extending continuously in the tire circumferential direction on both outer sides of the tire equator C are provided, and a pair of crown main grooves 3 are provided on the outer side of the tire axial direction of the crown main groove 3 along the tire circumferential direction. A pair of shoulder main grooves 4, 4 extending continu...

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Abstract

The present invention provides a tire aimed at improving wear life performance, stone trap resistance performance, and wet performance in a balanced manner. The tire (1) is provided with crown main grooves (3) and tire shoulder main grooves (4). The crown main grooves (3) are saw-toothed, and the saw-tooth shape is alternately formed by crown long sides (3A) and crown short sides (3B) in the tire circumferential direction. The shoulder main grooves (4) have a zigzag shape, and the zigzag shape is alternately formed by shoulder long sides (4A) and shoulder short sides (4B) in the tire circumferential direction. The ratio of the length (La) of the long side of the crown (3A) to the length (Lb) of the short side of the crown (3B), that is, the ratio of the length of the crown (La / Lb) is greater than that of the long side of the shoulder (4A) The ratio of the length (Lc) to the length (Ld) of the shoulder short side (4B), that is, the shoulder length ratio (Lc / Ld).

Description

technical field [0001] The present invention relates to a tire which improves wear life performance, stone chip resistance performance and wet performance in a balanced manner. Background technique [0002] On tires with many opportunities to run on non-paved roads other than paved roads, such as gravel roads with mixed pebbles, in order to ensure traction, tread grooves divide the tread portion into multiple blocks. Pattern, the tread grooves consist of main grooves extending in the circumferential direction of the tire, and transverse grooves in the intersecting direction. When driving on such non-paved roads, gravel or pebbles are embedded in the grooves of the tread portion, that is, stone embedded is prone to occur. In particular, stone embedded is highly likely to occur in the main groove near the tire equator, which is subjected to a large ground contact pressure. Therefore, when running in this rock-embedded state, the bottom of the groove is damaged by gravel or t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/04B60C11/12
CPCB60C11/0302B60C11/042B60C11/1236B60C2011/1213B60C2011/0346B60C2011/0353B60C2011/0365B60C11/11B60C11/0318B60C11/0304B60C11/04B60C11/1353B60C2011/1361
Inventor 前原敦史
Owner SUMITOMO RUBBER IND LTD
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