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Pneumatic tire

A technology of pneumatic tires and tires, which is applied to off-road vehicle tires, tire parts, tire treads/tread patterns, etc., can solve problems such as weakening rigidity, and achieve the effect of improving decorative effects

Active Publication Date: 2019-07-02
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding the tire having such an annular rib, the inventors of the present invention have found that the rigidity of the annular rib is weakened in the lug grooves that define the buttress blocks. There is room for improving the protection effect
In addition, it was also found that sometimes it is considered that the buttress pattern block is divided by the annular rib as the dividing line, which also has room for improvement in terms of decorative effect

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. figure 1 A tire meridian semi-sectional view schematically showing an example of a pneumatic tire according to the present invention corresponds to figure 2 The A-A section. figure 2 It is a developed view showing the shoulder area and the buttress area of ​​the pneumatic tire. exist figure 2 Here, the left-right direction is the tire circumferential direction, the downward direction is the outer side in the tire width direction, and the upward direction is the inner side in the tire width direction. Figure 3A-3D are respectively figure 2 Schematic diagrams of A-A, B-B, C-C, and D-D sections.

[0029] The pneumatic tire T is a pneumatic radial tire for non-paved roads intended to run on rough roads including muddy areas and rocky fields. Such as figure 1 As shown, the pneumatic tire T includes: a pair of bead portions 1, a pair of sidewall portions 2 ext...

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PUM

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Abstract

A pneumatic tire has paired bead portions, paired sidewall portions, a tread portion, a plurality of lug grooves extending from a shoulder area of the tread portion to reach a buttress area of the sidewall portion, and a block defined by the plurality of lug grooves. The block includes a shoulder block provided in the shoulder area, and a buttress block provided in the buttress area. The buttressarea is provided with an annular rib annularly extending along a tire circumferential direction. The lug grooves are comparted into an outside lug groove positioned in an outer side of the annular rib, and an inside lug groove positioned in an inner side of the annular rib. A widened portion is provided in at least part of the plurality of lug grooves so as to enlarge a width of the annular rib.

Description

technical field [0001] The present invention relates to a pneumatic tire intended to be able to run on bad roads such as muddy sections or rocky fields. Background technique [0002] Such a pneumatic tire is known in which a plurality of buttress blocks are arranged in a buttress region of a sidewall portion in order to improve running performance on muddy ground, rocky ground, and other poor road surfaces. According to the tire provided with such buttress blocks, since the traction effect (traction effect) due to shear resistance generated when running on a bad road surface can be obtained, the bad road surface passing performance can be improved. In addition, an effect (protective effect) of keeping the outer surface of the sidewall portion away from traumatic factors such as sharp-edged portions of the rock surface can be obtained, thereby improving trauma resistance. In addition, a decorative effect (appearance decorative effect) due to the concavo-convex shape of the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/01B60C13/00
CPCB60C11/03B60C11/01B60C13/00B60C13/02B60C2200/14B60C11/1236B60C11/1369B60C11/0327B60C11/11B60C2011/013B60C2011/0358B60C2011/1213B60C2011/1254B60C11/1204
Inventor 桒野慎吾
Owner TOYO TIRE & RUBBER CO LTD