Pneumatic tire

Abstract

The purpose of the present invention is to provide a pneumatic tire that can achieve, in a well-balanced manner, steering stability and abrasion resistance on a wet road surface. Provided is a pneumatic tire in which inner land-sections (21), formed between a center main-groove (11) and outer main-grooves (12) that are on both sides of the center main groove, are divided into a plurality of blocks (21A) by a plurality of sub-grooves (30), wherein: a pair of the sub-grooves (30) which are positioned at both sides of the center main-groove (11) are caused to be slanted in the same direction as the tire width-direction, and sub-groove openings on the center main-groove (11) side overlap in the tire circumferential direction; the sub-grooves (30) are disposed so that circumferential-direction components of the sub-grooves (30) are continuous along the entire circumference of the tire; each of the sub-grooves (30) is configured so that the groove-width thereof changes at a mid-way section in the length direction, and so as to include a narrow-width section (31) which is positioned on the outer main-groove (12) side and which has a relatively small groove-width (W1), and a wide-width section (32) which is positioned on the center main-groove (11) side and which has a relatively large groove-width (W2); and in each block (21A), formed is a sipe (40) that connects the narrow-width section (31) and the most narrow-width section (31) side point of the wide-width section (32).

Description

technical field [0001] The present invention relates to a pneumatic tire, and more specifically, to a pneumatic tire capable of balancing driving stability and wear resistance on wet roads. Background technique [0002] In general, pneumatic tires mainly used for small trucks and the like are mainly used in local driving, and stop and go at medium and low speeds are repeated, so excellent driving stability and resistance to uneven wear are required. performance tendencies. In addition, it is also required to respond to various road surface conditions and suppress noise such as passing sounds. [0003] Therefore, for example, in the pneumatic tire described in Patent Document 1, it has been proposed that the plurality of rows of lands defined by the plurality of circumferential main grooves extending in the tire circumferential direction are divided by the plurality of sub grooves extending in the tire width direction. In the case of a plurality of blocks, the groove width ...

AI Technical Summary

Problems solved by technology

[0004] However, in recent years, when such pneumatic tires are used especially in developing countries, there are many opportunities to use them under heavy loads. In addition, as the use environment, it is assumed that driving on slippery roads is often the case, but especially In the state where a heavy load is applied, not only the burden on the blocks becomes large, and wear tends to occur on the entire tire, but also the blocks are deformed and the grooves are crushed, thus, the groove volume tends to decrease and the drainage performance tends to decrease. Therefore, in the above-mentioned pneumatic tire, there is a problem that wear resistance and wet performance are insufficient.

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