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Tires for motorcycles

A technology for motorized two-wheeled vehicles and tires, which is applied to motor vehicles, motorcycle tires, road vehicle tires, etc., can solve the problems of deterioration of handling stability, inability to fully ensure tire stiffness, and decrease of tire shoulder stiffness, etc., to achieve improved The effect of wet grip and good handling stability

Active Publication Date: 2022-03-29
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, there is a problem that the stiffness of the shoulder portion of the tread is lowered, the stiffness in the straight direction of the tire cannot be ensured sufficiently when cornering, and the steering stability is deteriorated.

Method used

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  • Tires for motorcycles
  • Tires for motorcycles
  • Tires for motorcycles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Made according to tire size 110 / 80R19MC figure 1 The cross-sectional configuration shown and has a figure 2 The motorcycle tire of Example 1 having the tread pattern as shown.

[0060] The tread portion forming the tire contact portion is formed of a center rubber arranged across the tire equator and both side rubbers arranged outside the center rubber in the tire width direction. The position is 5 / 8 of the half width of the outer edge length. In addition, the 300% modulus M at 100°C of the central rubber 300 (C) and 300% modulus M of the rubber on both sides at 100°C 300 (S) Satisfy M 300 (C)>M 300 (S).

[0061] In addition, the curved portion of the first groove exists at a position of 1 / 4 of the half width of the outer edge length from the tire equator, and the curved portion of the second groove exists at a position of 3 / 8 of the half width of the outer edge length from the tire equator. position, the inner end of the tire width direction of the second groo...

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PUM

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Abstract

The present invention provides a tire for motorcycles that further improves wet grip performance when cornering while ensuring stiffness when cornering. The tread part is formed by the central rubber (11C) and the rubber on both sides (11S) with lower modulus. The ground surface includes the first groove, the second groove, and the third groove, the bent portion of the first groove and the second groove, the widthwise inner end and the widthwise outer end of the second groove, and the widthwise inner end of the third groove Parts are located at 1 / 8~3 / 8, 1 / 4~1 / 2, 1 / 16~3 / 16, 5 / 8~7 / 8, 1 / 2~ The range of 5 / 8, the angles θ1, θ2, θ3, θ4 formed by the long groove part and short groove part of the first groove, the outer groove part and inner groove part of the second groove, and the third groove relative to the tire circumferential direction respectively , θ5 satisfy θ1≈θ2≈θ3≈θ5, θ1>θ4, the distances a, b, and c between the first groove to the second groove, the second groove to the third groove, and the third groove to the first groove satisfy a ≈b≈c.

Description

technical field [0001] The present invention relates to a tire for motorcycles (hereinafter also simply referred to as "tire"). wheel tires. Background technique [0002] Unlike four-wheeled vehicles such as cars, trucks, and buses, one of the characteristics of two-wheeled vehicles is that they turn by tilting the vehicle body. Therefore, tires for motorcycles have a crown portion whose curvature radius is larger than that of tires for four-wheeled vehicles. A tire shape with a small radius of curvature and a relatively round cross section. That is, in a pneumatic tire for a motorcycle, the center portion of the tread mainly contacts the ground when the vehicle is running straight, and the shoulder portion of the tread contacts the ground when the vehicle is turning. [0003] Based on the characteristics of such motorcycle tires, as a method of ensuring grip performance when cornering in motorcycle tires, it can be cited that the shoulder portion of the tread used when co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/00B60C11/03
CPCB60C11/00B60C11/03B60C11/032B60C11/0302B60C2200/10B60C2200/04B60C11/0304B60C2011/0362B60C2011/0372
Inventor 中村贵光时任泰史岛村直贵
Owner BRIDGESTONE CORP
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