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pneumatic tire

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

Active Publication Date: 2021-02-02
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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Embodiment Construction

[0030]Hereinafter, embodiments of the present invention will be described with reference to the drawings.figure 1 Is a tire meridian half cross-sectional view schematically showing an example of the pneumatic tire of the present invention, which corresponds tofigure 2 The C-C profile.figure 2 It is a development view schematically showing the shoulder area and the sidewall area of ​​the pneumatic tire. infigure 2 Here, the left-right direction is the tire circumferential direction, the lower 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~3DAre respectivelyfigure 2 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 for the purpose of driving on harsh roads including muddy and rocky areas. Such asfigure 1 As shown, the pneumatic tire T includes a pair of bead portions 1, a pair of sidewall portions 2 respectively exten...

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Abstract

Technical problem: To provide a pneumatic tire capable of improving the protection effect of the sidewall area and improving the trauma resistance. Solution: a plurality of lug grooves (8) extending outward in the tire width direction from a shoulder area (3S) of the tread portion (3) and reaching a sidewall area (2B) of the sidewall portion (2), and A block divided by the plurality of pattern grooves (8). The blocks divided by the grooves (8) include shoulder blocks (31) and sidewall blocks (21). At least a part of the pattern grooves (8A) among the plurality of pattern grooves (8) are closer to the position that is 50% of the tire radial length (L21) of the sidewall block (21) than the upper end position of the sidewall block (21) The connecting portion (23) provided on the inner side in the tire radial direction ends. A step (24) having a maximum bulge height of the sidewall block (21) based on the outer surface (2a) of the sidewall portion (2) is provided at a position in the tire radial direction of the connecting portion (23).

Description

Technical field[0001]The present invention relates to a pneumatic tire for driving on harsh 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 the sidewall region of the sidewall for the purpose of improving the running performance on rough roads such as muddy ground and rocky areas. In a tire equipped with such a sidewall block, since it is possible to obtain a traction effect (traction effect) based on a shearing resistance when driving on a bad road, the off-road performance on bad roads can be improved. In addition, by providing the sidewall block, an effect (protective effect) of keeping traumatic factors such as angular portions of the rock surface away from the outer surface of the sidewall portion is obtained, and the trauma resistance is improved.[0003]Patent Documents 1 and 2 each describe a pneumatic tire having annular ribs that traverse sidewall blocks and extend annularl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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