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Pneumatic tires for two-wheeled motor vehicles

A technology for motorized two-wheeled vehicles and pneumatic tires, which is applied in the directions of motor vehicles, motorcycle tires, tire parts, etc.

Active Publication Date: 2021-07-23
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To deal with this, conventionally, the operation of increasing the ratio of grooves in the tread pattern or increasing the low-temperature loss of the tread rubber has been mainly carried out. However, there is a problem that these methods have a large adverse effect on the wear performance.

Method used

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  • Pneumatic tires for two-wheeled motor vehicles
  • Pneumatic tires for two-wheeled motor vehicles
  • Pneumatic tires for two-wheeled motor vehicles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] According to the conditions shown in the table below, according to the tire size MCR120 / 70ZR17M / C figure 1 , figure 2 A pneumatic radial tire for motorcycles according to Example 1 having the cross-sectional structure and tread pattern shown. The carcass 1 has two layers, and rayon is used as a reinforcing cord. In addition, as the belt layer 2 , a single helix belt in which rubber-coated steel cords are helically wound is used.

[0045] In the tire of Example 1, the first inclined groove extending obliquely in the same direction as the tire rotation direction from the vicinity of the tire equator toward the outer side in the tire width direction, and the tire width arranged on the first inclined groove are provided on the tire contact surface portion. Short slot in extension of direction outboard end. In addition, the outer end in the tire width direction of the first inclined groove is located near a point offset from the tire equator to the outside in the tire w...

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Abstract

The present invention provides a pneumatic tire for a motorcycle with improved wet grip while ensuring steering stability during cornering. The pneumatic tire for motorcycles has first inclined grooves (21) and short grooves (22) on the ground contact portion, and the first inclined grooves are inclined in the same direction as the tire rotation direction from the vicinity of the tire equator to the outer side in the tire width direction. The short groove is arranged on the extension line of the outer end in the tire width direction of the first inclined groove (21). In the vicinity of the point of / 4, the inner end in the tire width direction of the short groove is located in the range of 1 / 4 to 5 / 16 of the tread width TW from the tire equator to the outer side in the width direction, and the inclination of the first inclined groove with respect to the tire circumferential direction The angle increases toward the outer side in the width direction, and the angle θ formed by the groove wall at the outer end in the width direction of the first inclined groove with respect to the direction perpendicular to the tire surface A The angle θ formed by the groove wall at the inner end in the width direction of the short groove with respect to the direction perpendicular to the tire surface B satisfy theta A >θ B Relationship.

Description

technical field [0001] The present invention relates to a pneumatic tire for a motorcycle (hereinafter also simply referred to as a "tyre"). Specifically, the present invention relates to a pneumatic tire for a motorcycle involving improvement of a tread portion. Background technique [0002] Unlike four-wheeled vehicles such as passenger cars, trucks, and buses, due to the characteristics of two-wheeled vehicles that turn by tilting the body, pneumatic tires for two-wheeled vehicles have crowns that have a smaller curvature than tires for four-wheeled vehicles The cross-section of the radius is rounder than the tire shape. 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] In connection with the characteristics of such pneumatic tires for motorcycles, in the tread pattern of pneumatic ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/03
CPCB60C2200/10B60C2011/0381B60C2011/0372B60C11/1315B60C11/0302B60C11/1323
Inventor 高桥淳一内田光则
Owner BRIDGESTONE CORP
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