pneumatic tire

A pneumatic tire, tire circumferential technology, applied to tire parts, tire tread/tread pattern, transportation and packaging, etc. The effect of braking performance on ice and improving driving stability on snow

Inactive Publication Date: 2018-02-09
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, as disclosed in Patent Document 1, if a plurality of sipes or fine grooves are provided in the tread portion, the tread portion will be subdivided, which may reduce the rigidity of the tread portion.
Therefore, there is a problem that it is difficult to maintain the stability performance on snow, which requires a high level of rigidity of the tread portion.

Method used

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no. 1 approach

[0026] Hereinafter, a pneumatic tire 1 according to a first embodiment of the present invention will be described with reference to the drawings. figure 1 It is a meridian sectional view of the pneumatic tire 1 according to the first embodiment of the present invention. In addition, the meridian cross-sectional shape of the pneumatic tire 1 according to the first embodiment is the same as that of a conventional pneumatic tire. Here, the meridian cross-sectional shape of the pneumatic tire refers to the cross-sectional shape of the pneumatic tire appearing on a plane perpendicular to the tire equatorial plane CL.

[0027] In the following description, the tire radial direction refers to a direction perpendicular to the rotation axis AX of the pneumatic tire 1 . The tire circumferential direction refers to the direction that rotates around the above-mentioned rotation axis AX (see figure 2 ). In addition, the tire width direction refers to a direction parallel to the above-m...

no. 2 approach

[0050] Below, refer to Figure 4 , the pneumatic tire 1 according to the second embodiment of the present invention will be described. Figure 4 It is a schematic development plan view showing a part of the tread portion 10 of the pneumatic tire 1 according to the second embodiment of the present invention. In addition, regarding the second embodiment, only the points of difference from the first embodiment will be described.

[0051] Such as Figure 4 As shown, in the pneumatic tire 1 according to the second embodiment, like the pneumatic tire 1 according to the first embodiment, lug grooves 14 are provided to communicate the circumferential main grooves 12 with each other or connect the circumferential main grooves 12 to the ground. Terminal CE is connected. Here, in the pneumatic tire 1 according to the first embodiment, the distance between lug grooves 14 adjacent in the tire circumferential direction is constant. On the other hand, in the pneumatic tire 1 according to...

no. 3 approach

[0057] Below, refer to Figure 5 , the pneumatic tire 1 according to the third embodiment of the present invention will be described. Figure 5 It is a schematic development plan view showing a part of the tread portion 10 of the pneumatic tire 1 according to the third embodiment of the present invention. In addition, regarding the third embodiment, only the points of difference from the first embodiment will be described. The pneumatic tire 1 according to the third embodiment is different from the pneumatic tire 1 according to the first embodiment in that the shape of the small blocks 20 is an arrow-feather shape directed toward the tire circumferential direction.

[0058] In the pneumatic tire 1 according to the third embodiment, as Figure 5 As shown, the small block 20 has a convex portion 20P on one side in the tire circumferential direction that is convex toward the small block adjacent in the tire circumferential direction, and has a convex portion 20P on the other si...

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PUM

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Abstract

The invention relates to a pneumatic tire (1), which is divided by a plurality of linear circumferential thin grooves (16) and a plurality of width direction thin grooves (18) communicating with the circumferential thin grooves to form a plurality of small pattern blocks (20), Between adjacent thin grooves in the circumferential direction, small pattern block rows (22) are formed which are arranged along the tire circumferential direction. The area of ​​the small block is different from the area of ​​at least one small block included in the adjacent small block row on at least one side in the tire width direction and overlapping the tire circumferential area (CA). In addition, the area of ​​the small blocks is not less than 20 mm2 and not more than 400 mm2.

Description

technical field [0001] The invention relates to a pneumatic tire, in particular to a studless antiskid tire with improved performance on ice and snow. Background technique [0002] In studless tires, it is common to provide a plurality of sipes or fine grooves on the tread portion to improve the edge effect, thereby improving the braking performance on ice especially at high temperatures (near 0°C) (for example, refer to Patent Document 1) . [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent No. 3690836 [0006] Summary of the invention [0007] The problem to be solved by the invention [0008] However, as disclosed in Patent Document 1, if a plurality of sipes or fine grooves are provided in the tread portion, the tread portion will be subdivided, which may reduce the rigidity of the tread portion. Therefore, there has been a problem that it is difficult to maintain the stability performance on snow, which is a perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/11
CPCB60C11/11B60C2011/036B60C2011/1213B60C2011/0348B60C2011/1245B60C11/0302B60C11/0306B60C11/0327B60C2011/0358B60C2011/0374
Inventor 古泽浩史
Owner THE YOKOHAMA RUBBER CO LTD
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