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Pneumatic tire

A technology of pneumatic tires and tires, which is applied in the direction of off-road vehicle tires, tire parts, tire tread/tread pattern, etc., and can solve the problem that the height of the tire wall blocks is not so large

Active Publication Date: 2019-07-12
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors of the present invention focused on the fact that, in the vicinity of the lower end position of the sidewall block, although the outer surface of the sidewall portion is exposed, the bulge height of the sidewall block is not so large, and found that there is a possibility of improving the protective effect by improving it. room for

Method used

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  • Pneumatic tire
  • Pneumatic tire
  • Pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Embodiments of the present invention will be described below with reference to the drawings. figure 1 It is a tire meridian semi-sectional view schematically showing an example of the pneumatic tire of the present invention, corresponding to figure 2 The C-C profile. figure 2 It is a developed view schematically showing the shoulder region and the sidewall region of the pneumatic tire. exist figure 2 Herein, the left-right direction is the tire circumferential direction, the downward direction is the outer side in the tire width direction, and the upper direction is the inner side in the tire width direction. Figure 3A-3D are respectively figure 2 A schematic diagram of the A-A, B-B, C-C, and D-D sections of .

[0031] The pneumatic tire T is a pneumatic radial tire for off-road use intended for driving on bad roads including muddy ground and rocky areas. Such as figure 1 As shown, the pneumatic tire T includes a pair of bead portions 1, a pair of sidewall po...

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Abstract

The invention provides a pneumatic tire. The protection effect of the tire wall is improved, and the scratch resistant performance is strengthened. The pneumatic tire has a plurality of lug grooves (8) extending from a shoulder area (3S) of the tread portion (3) to reach a buttress area (2B) of the sidewall portion (2), and a block defined by the plurality of lug grooves (8). The block includes ashoulder block (31) and a buttress block (21). At least some (8A) of the plurality of lug grooves (8) end at a connecting portion (23), the connecting portion (23) is provided on an inner side in thetire diametrical direction of position that are 50% of length (L21) in the tire diametrical direction of the buttress block (21) from upper end position of the buttress block (21). A step (24) where the buttress block (21) has a largest upraised height is provided in the tire diametrical position of the connecting portion (23) by taking the outer surface (2a) of the sidewall portion (2) as the reference.

Description

technical field [0001] The present invention relates to a pneumatic tire for running on bad roads such as muddy ground and rocky areas. Background technique [0002] A pneumatic tire is known in which a plurality of sidewall blocks are arranged in a sidewall region of a sidewall for the purpose of improving running performance on bad roads such as muddy ground and rocky areas. In a tire having such a sidewall block, since the effect of generating traction due to shear resistance (traction effect) can be obtained when the tire is running on a bad road, the off-road performance on bad roads can be improved. In addition, by providing the sidewall blocks, an effect (protection effect) of keeping trauma factors such as angular portions of the rock surface away from the outer surface of the sidewall portion is obtained, thereby improving trauma resistance. [0003] Patent Documents 1 and 2 each describe a pneumatic tire including an annular rib extending annularly across a sidewa...

Claims

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Application Information

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IPC IPC(8): B60C13/02B60C11/01
CPCB60C13/02B60C11/01B60C2011/013B60C11/1369B60C11/0311B60C2200/14B60C2011/0358B60C11/032
Inventor 桒野慎吾
Owner TOYO TIRE & RUBBER CO LTD