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Pneumatic tire

A technology of pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc. It can solve the problems of land column rigidity reduction, etc., so as to improve the shearing force of snow columns and suppress the reduction of rigidity , the effect of suppressing partial wear

Active Publication Date: 2019-06-21
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is effective to increase the groove volume of the tread to improve snow performance, but there is a tendency for the rigidity of the land row to decrease as the groove volume increases.

Method used

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Examples

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Embodiment Construction

[0028] Embodiments of the present invention will be described below with reference to the drawings.

[0029] Such as figure 1 As shown, the tread Tr of the pneumatic tire of this embodiment is provided with a plurality of main grooves 1 extending continuously in the tire circumferential direction and a plurality of land portion rows 2 divided by the plurality of main grooves 1 . In the example shown in this embodiment, four main grooves 1 are provided in the tread Tr, and five land portion rows 2 are defined by the four main grooves 1 . The number of main grooves 1 is preferably three or more.

[0030] The four main grooves 1 are constituted by a pair of shoulder main grooves 11 , 11 located outermost in the tire width direction and a pair of center main grooves 12 , 12 located therebetween. The pair of shoulder main grooves 11, 11 are respectively formed by linear grooves. A pair of central main grooves 12, 12 are respectively formed by zigzag grooves. A pair of central m...

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Abstract

The invention provides a pneumatic tire capable of improving snow performance. A tread (Tr) is provided with a plurality of main grooves (1) continuously extending in the tire circumferential direction, and a plurality of land rows (2) divided by the plurality of main grooves (1). The land row (2) is provided with a snow hole (3) formed in the center of the land row (2) in the width direction, andsipes (4) for connecting the main groove (1), the ground contact end (CE) or the lateral groove to the snow hole (3). Therefore, the shearing force of the snow column during the driving on the ice and snow covered road surface can be improved, the occurrence of snow inclusion can be inhibited, and the snow performance is improved.

Description

technical field [0001] The present invention relates to a pneumatic tire having excellent snow performance characterized by a tread structure, and is particularly useful as a studless tire. Background technique [0002] The tread of a pneumatic tire is provided with a plurality of main grooves extending continuously in the tire circumferential direction, and a plurality of land portion rows divided by the plurality of main grooves, and various grooves are formed according to the required tire performance and service conditions. Kind of tread pattern. In addition, for example, as described in Patent Documents 1 and 2, for the purpose of improving snow performance (running performance on icy and snowy roads), etc., grooves called sipes are sometimes formed on the surface of the land portion rows. [0003] It is effective to increase the groove volume of the tread in order to improve the snow performance, but there is a tendency for the rigidity of the land portion row to decr...

Claims

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Application Information

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IPC IPC(8): B60C11/03B60C11/12
Inventor 藤冈刚史
Owner TOYO TIRE & RUBBER CO LTD
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