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Pneumatic tire

A technology for pneumatic tires and tires, applied in tire parts, tire treads/tread patterns, vehicle parts, etc., can solve problems such as deterioration of ride comfort, and achieve the effect of improving ride comfort and achieving on-ice performance.

Pending Publication Date: 2022-06-07
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, when driving on roads other than icy and snowy roads (especially dry paved roads), the impact of hard studs touching the paved road is transmitted as a shock feeling, which may cause deterioration of ride comfort.

Method used

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  • Pneumatic tire
  • Pneumatic tire
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Examples

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Embodiment

[0038] Made tire size 205 / 55R16 94T with figure 1 The basic construction illustrated, with figure 2 11 types of pneumatic tires, conventional Example 1, Comparative Examples 1 to 2, and Examples 1 to 8, whose tread pattern was the basic tone and whose structures were set as shown in Table 1.

[0039]In Table 1, "total N" is the total number of studs provided in the entire tire, and "n" is the number of studs included in each dense area. Regarding the "maximum value of n in the belt region", the conditions of the upper limit value defined in the present invention (4.0% of the total number N=0.04N), the measured values ​​in each tire, and their magnitude relationship are shown. In particular, regarding the magnitude relationship, the case where the measured value is below the upper limit condition (0.04N) is represented by "0", and the case where the measured value exceeds the upper limit condition (0.04N) is represented by "x". The "standard arrangement area" means a band-sh...

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Abstract

Provided is a pneumatic tire in which studs are implanted on a tread surface of a tread portion, and which is capable of improving riding comfort performance on dry road surfaces while improving performance on ice. In a pneumatic tire in which studs (P) are implanted on a tread surface of a tread portion (1), a plurality of belt-shaped regions (A) are arranged on the entire circumference of the tire while being sequentially staggered by 1 degree in the circumferential direction of the tire, where a region defined between a pair of tire meridians disposed so that the interval on the tire equator (CL) is 1 / 4 of the ground contact length of the tire is a belt-shaped region (A). Among all of the plurality of belt-shaped regions (A), the number n of studs (P) included in each belt-shaped region (A) is 4.0% or less of the total number N of studs (P) over the entire circumference of the tire, and in at least 2 / 3 of the plurality of belt-shaped regions (A), the number n of studs (P) included in the belt-shaped region (A) is 2.0% or more of the total number N.

Description

technical field [0001] The present invention relates to a pneumatic tire in which a stud is planted on a tread surface of a tread portion. Background technique [0002] In severe winter regions such as Northern Europe and Russia, studded tires are mainly used as winter tires. In a studded tire, a plurality of implant holes for implanting studs are provided in the tread portion, and studs are implanted in these implant holes (for example, refer to Patent Document 1). When driving on icy and snowy roads, such a cleat exerts the effect of scratching the icy and snowy road surface, so that the performance on ice can be improved. On the other hand, when driving on a road other than icy and snowy roads (especially dry pavement roads), the impact of the hard cleat contacting the paved road surface is transmitted as a shock feeling, which may be a factor that deteriorates riding comfort. . In addition, even in winter in severe winter areas, there is a chance to drive on paved roa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/16
CPCB60C11/03B60C11/16B60C11/1236B60C11/1625B60C11/1643
Inventor 芝井孝志
Owner THE YOKOHAMA RUBBER CO LTD
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