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motorcycle tires

A technology for motorcycles and tires, which is applied to motorcycle tires, motorcycles, bicycle tires, etc. It can solve the problems of reduced vibration absorption, low ride comfort, and excessive rigidity, achieving large traction, improving rigidity, and Balanced ride comfort performance and handling stability performance

Active Publication Date: 2021-02-02
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, although the above-mentioned tires have high steering stability performance, the rigidity is partially too large, and the vibration absorption during running is reduced, so there is a problem of low ride comfort performance.

Method used

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  • motorcycle tires
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0056] Prototyped according to the specifications in Table 1 with figure 1 The basic structure of motorcycle tires with a size of 190 / 50ZR17 was used, and the handling stability and ride comfort performance of each tire were tested. Common specifications and test methods for each test tire are as follows.

[0057] Width Wa / TWe of tread reinforcement: 84%

[0058] Number of reinforcing cords: three

[0059] Material of reinforcement cord: steel

[0060] Separation distance La between reinforcing cords: 3.3mm

[0061] Initial elongation of first reinforcing cord: 0.8%

[0062]

[0063]Each test tire was mounted on the rear wheel of a motorcycle with a displacement of 1300 cc under the following conditions. A test driver drives the above-mentioned vehicle on a test road on a dry asphalt road. By testing the driver's senses, the steering wheel responsiveness, traction, grip, and other related cornering characteristics and vibration absorption during driving are evaluated. ...

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PUM

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Abstract

The present invention provides a tire (1) for motorcycles which improves handling stability performance and ride comfort performance in a balanced manner. The motorcycle tire (1) includes: a carcass (6) extending from a tread portion (2) through a sidewall portion (3) to a bead core (5) of a bead portion (4); and a tread reinforcement A layer (7) arranged outside the carcass (6) in the tire radial direction and inside the tread portion (2). The tread reinforcement layer (7) is a strip-shaped cord (10) in which a plurality of reinforcing cords (11) are arranged side by side and covered with a rubber (12) and is spirally wound around the above-mentioned carcass. It is formed on the outside of the radial direction of the tire. The winding pitch Pm of the tape ply (10) in the middle region (Mi) is smaller than the winding pitch Pc of the tape ply (10) in the crown region (Cr) and the winding pitch of the tape ply (10) in the shoulder region (Sh) The winding pitch Ps.

Description

technical field [0001] The present invention relates to a tire for motorcycles in which steering stability performance and riding comfort performance are improved in a balanced manner. Background technique [0002] The motorcycle tire includes a carcass and a tread reinforcing layer arranged outside the carcass in the tire radial direction and between both tread ends. Conventionally, as a method of forming this tread reinforcing layer, for example, a method of spirally winding a belt-shaped cord in which a plurality of reinforcing cords are arranged is known. The winding of the belt-like cord is formed, for example, by bringing the side surfaces of the belt-like cord adjacent in the tire axial direction into close contact with each other. A tire having such a tread reinforcement layer tightens the carcass with a large force inside and outside the tread portion in the tire axial direction to increase rigidity, thereby exhibiting excellent steering stability. [0003] Howeve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C9/22B29D30/60
CPCB29D30/60B60C9/22B60C2200/12B60C2200/10B60C2009/2295B60C2009/2252B60C2009/2223B29D30/38B29D2030/383B60C2009/2271B60C9/2204B29B15/08B60C9/0042B60C9/08B60C9/20B60C11/00
Inventor 栃木祐纪
Owner SUMITOMO RUBBER IND LTD