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Motorcycle tire

一种摩托车、轮胎的技术，应用在摩托车轮胎、摩托车、轮胎零部件等方向，能够解决侧抗力降低、过渡特性变差、转弯性能降低等问题，达到抑制热熔融、保持寿命、提高散热性的效果

Active Publication Date: 2013-09-11
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the motorcycle tires described above, since the maximum width of the groove is arranged within the ground contact patch during cornering, there is a possibility that the cornering performance may be lowered, such as reduced cornering force and poor transition characteristics during rollover.

Method used

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  • Motorcycle tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0079] Manufacturing has figure 1 The basic structure of the rear tires for motorcycles based on the specifications in Table 1, and their performance was tested. In addition, for comparison, the same test was performed on a commercially available tire having the same basic structure as a conventional example. Among them, the common specifications are as follows.

[0080] Tire size:

[0081] Front wheel: 120 / 70ZR17

[0082] Rear wheel: 180 / 55ZR17

[0083] Rim size:

[0084] Front wheel: 17×MT3.50

[0085] Rear wheel: 17×MT5.50

[0086] Internal pressure:

[0087] Front wheel: 250kPa

[0088] Rear wheel: 290kPa

[0089] The test method is as follows.

[0090]

[0091] The test tire is mounted on the rear wheel of a motorcycle with a displacement of 600cc, and a test run is carried out on a circuit with a lap length of 3700m. By testing the driver's senses, the "tire life", "heat fusion performance", comfort", "initial cornering pe...

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Abstract

A motorcycle tire in the invention maintains turning performance and tire life and inhibits thermal fusion of a tread portion. The tread portion (2) is provided with a plurality of inner inclined grooves (10) and inclined narrow grooves (11) in both sides of a tire equator (C), wherein each inner inclined groove (10) extends with an angle of 0-20 degrees with respect to the tire circumferential direction; the inner end (10i) of the inner inclined groove is located in a developed length within 5% of the tread half developed-width (TWh) from the tire equator; the first and the second inner inclined grooves (10A, 10B) are alternately arranged in the circumferential direction of the tire; each inner inclined groove (10) has a circumferential length of 70-85 % of a first pitch (P); inclined narrow grooves (11) each of which has a groove width of 0.5-2.0 mm is arranged in the area between adjacent inner inclined grooves (10, 10). Each inclined narrow groove has an inner end (11i) which is located in a developed length within 10% of the read half developed-width from the tire equator, and extends to the outer end (11o) with an angle larger than that of the inner inclined grooves. The outer ends (11o) of the inclined narrow grooves is located at the outer side of a ground plane (S1) while a motorcycle goes straight. The land proportion (Rc) of the ground plane while the motorcycle goes straight is 85-95%.

Description

technical field [0001] The present invention relates to a tire for motorcycles capable of maintaining cornering performance and tire life, and capable of suppressing heat fusion of a tread portion. Background technique [0002] In recent years, with the increase in output of motorcycles, a large load acts on the tread portion of motorcycle tires at the time of straight running on the ground contact surface. Therefore, it is required to increase the land ratio of the central portion of the tread portion. Such a tire for motorcycles can obtain the effect of improving wear resistance and extending the life of the tire in addition to exhibiting high straight running stability. However, such tires for motorcycles have a problem that heat dissipation tends to occur early because the central part of the tread portion has a relatively high land area, so that heat dissipation is reduced, for example, when continuously running under a high load. [0003] In response to such a problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03
CPCB60C11/0302B60C11/033B60C2011/0348B60C2011/036B60C2011/0372B60C2011/0376B60C2200/10B60C11/03B60C11/04B60C11/0304
Inventor 芝本升平
Owner SUMITOMO RUBBER IND LTD
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