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pneumatic tire

A pneumatic tire, tire circumferential technology, applied in tire parts, tire tread/tread pattern, vehicle parts, etc., can solve the problem of increased wear, and achieve the effect of inhibiting partial wear and uniform ground pressure

Active Publication Date: 2021-08-03
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, uneven wear may occur in which the amount of wear near the ground contact edge of the shoulder land portion becomes larger than that of other land portions of the tread portion.

Method used

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  • pneumatic tire
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Experimental program
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no. 1 approach

[0028] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[0029] figure 1 It is a right side half sectional view obtained by cutting the pneumatic tire 10 according to the embodiment along a meridian section including the tire shaft. Here, since the tire is bilaterally symmetrical, illustration of the left half is omitted.

[0030] figure 1 The pneumatic tire 10 includes: a pair of left and right bead portions 12; a pair of left and right sidewall portions 14 extending radially outward from the bead portions 12; a tread portion 16 constituting a tread surface; and a pair of left and right The support portions 18 are disposed on the inner side of the tread portion 16 in the tire radial direction. Here, the support portion 18 is a boundary region between the tread portion 16 and the sidewall portion 14 , and is provided to connect the tread portion 16 and the sidewall portion 14 .

[0031] The pneumatic tire 10 includ...

no. 2 approach

[0050] Next, based on Figure 4 and Figure 5 , the second embodiment of the present invention will be described. In addition, description of the same parts as those of the first embodiment will be omitted, and different parts will be described.

[0051] In the present embodiment, in addition to the small hole 50 , a narrow groove 60 is provided on the inner side Wi in the tire width direction of the ground contact edge E of the shoulder land portion 42 .

[0052] Specifically, the narrow groove 60 extends in the tire circumferential direction between the ground contact end E of the shoulder land portion 42 and the plurality of small holes 50 . The narrow groove 60 divides the shoulder land portion 42 into a main body land portion 421 on the inner side Wi in the tire width direction and a sacrificial land portion 422 on the outer side Wo in the tire width direction. In the main body land portion 421 , a plurality of small holes 50 are provided on the outer side Wo of the na...

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PUM

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Abstract

A pneumatic tire (10) comprising, on a tread portion (16), a plurality of main grooves (36) extending along the tire circumferential direction, and a plurality of land portions (38, 40) divided by the main grooves (36). , 42), wherein the main groove (36) includes: a shoulder main groove (36B) provided on the outer side Wo in the tire width direction, and the land portion (38, 40, 42) includes: a shoulder main groove (36B) The shoulder land portion (42) on the outer side Wo in the tire width direction is provided with a plurality of small holes ( 50), the small hole (50) has a curved portion (53) curved toward the inner side Wi in the tire width direction with respect to the depth direction.

Description

technical field [0001] The present invention relates to pneumatic tires. Background technique [0002] Pneumatic tires tend to have a high ground contact pressure in the vicinity of the ground contact edge of the shoulder land portion of the tread portion in general during running. As a result, uneven wear may occur in which the amount of wear near the ground contact edge of the shoulder land portion becomes larger than that of other land portions of the tread portion. As a method of suppressing such uneven wear, as disclosed in Japanese Patent Application Laid-Open No. 8-258513 and Japanese Patent Laid-Open No. 5-294112, sometimes an opening in the tread surface is provided near the ground contact edge of the shoulder land portion. of multiple small holes. According to this method, the rigidity in the vicinity of the ground contact edge of the shoulder land portion can be reduced, and the ground contact pressure can be made uniform. Contents of the invention [0003] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/01
Inventor 横枕圣二
Owner TOYO TIRE & RUBBER CO LTD