Tire

A tire, tire circumferential technology, applied in tire parts, tire tread/tread pattern, transportation and packaging, etc., can solve problems such as insufficient handling stability, achieve superior wet road performance, and improve handling stability , the effect of improving rigidity

Pending Publication Date: 2020-09-04
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the tire of Patent Document 1, the rigidity of the land portion on the outer side of the tire axial direction of the above-mentioned middle block tends to be insufficient, and the steering stability in cornering in particular tends to be insufficient.

Method used

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Embodiment Construction

[0029] Hereinafter, one embodiment of the present invention will be described based on the drawings.

[0030] figure 1 A developed view of the tread portion 2 of the tire 1 according to the present embodiment is shown. Such as figure 1 As shown, the tire 1 of the present embodiment is, for example, a pneumatic tire for passenger cars. In a more preferable mode, the tire 1 of the present embodiment is suitable as a rain tire for racing on a circular track. In addition, the tire 1 of the present embodiment has, for example, a tread width of 300 to 350 mm, an outer diameter of 700 to 730 mm, and a rim diameter of 17 to 19 inches, and is used for so-called touring car racing. However, the tire of the present invention is not limited to such an embodiment.

[0031] The tire 1 of the present embodiment is assigned a rotational direction R, for example. The rotation direction R is indicated on the sidewall portion (not shown) or the like by letters or symbols, for example.

[0...

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PUM

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Abstract

The invention provides a tire with improved wet performance and handling stability. A tread part (2) is divided into 5 land parts (4) by 4 main grooves (3). The five land parts (4) are composed of twoshoulder land parts (7), two middle land parts (8), and one crown land part (9). Each middle land part (8) is a half-block row including a rib pattern area (13) and a block area (14) divided by a plurality of middle lateral grooves (12). Each shoulder land part (7) is a block row divided by a plurality of shoulder transverse grooves (15). The total area S1 of the tread of each shoulder land part(7) is larger than the total area S2 of the tread of the middle land part (8) adjacent to the shoulder land part (7) via a main shoulder groove (5).

Description

technical field [0001] The present invention relates to tires. Background technique [0002] A tire proposed in Patent Document 1 below includes: a linear rib disposed on the tread center side and extending linearly and continuously in the tire circumferential direction; and an intermediate block connected to the linear rib. The above-mentioned middle blocks are divided by inclined transverse grooves. In the tire, the linear rib pattern suppresses the collapse of the middle block, thereby preventing a decrease in the groove volume of the inclined lateral grooves, and further improving wet performance is expected. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2015-171872 [0004] In the tire of Patent Document 1, the rigidity of the land portion on the outer side of the tire axial direction of the above-mentioned middle block tends to be insufficient, and the steering stability especially when cornering tends to be insufficient. Therefore, the tire of Patent Do...

Claims

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Application Information

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IPC IPC(8): B60C11/03B60C11/12
CPCB60C11/03B60C11/1236B60C2011/0341B60C11/0302B60C2011/0386B60C11/1259B60C2011/0381B60C11/033
Inventor 松浦公治
Owner SUMITOMO RUBBER IND LTD
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