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Tire for motorcycle for rough terrain

一种摩托车、轮胎的技术，应用在摩托车轮胎、摩托车、越野车轮胎等方向，能够解决转弯性能不利、胎肩块刚性降低等问题，达到优异转弯性能、横向抓地力增加、转弯力增加的效果

Active Publication Date: 2019-07-05
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of using the thin grooves in the proposed tire, the rigidity of the shoulder blocks decreases due to the thin grooves, which is disadvantageous for cornering performance.

Method used

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  • Tire for motorcycle for rough terrain
  • Tire for motorcycle for rough terrain
  • Tire for motorcycle for rough terrain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Hereinafter, embodiments of the present invention will be described in detail.

[0027] Such as figure 1 As shown, the uneven terrain motorcycle tire 1 (sometimes simply referred to as the tire 1 ) of this embodiment is a tire for off-road motorcycle racing, and has a block pattern composed of a plurality of blocks 13 on the tread portion 2 . Each block 13 protrudes from the bottom surface 2A of the sea portion of the tread portion 2 .

[0028] The blocks 13 include: a row Rs of shoulder blocks 13s forming the tread end Te; and a row Rm of intermediate blocks 13m arranged axially inward of the shoulder blocks 13s. In this example, the case where the row Rc of the center block 13c which is arrange|positioned in the tire axial direction inner side of the said intermediate block 13m is shown is shown.

[0029] In detail, such as Figure 4 As shown, when the width region Y between the tread ends Te and Te is divided into five equal parts, the shoulder region Ys, Ys, the ...

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PUM

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Abstract

The invention provides a tire for motorcycle for a rough terrain, capable of improving turning performance. A tire comprises shoulder blocks 13s and middle blocks 13m having ground contacting surfaces(S) respectively provided with narrow grooves 15s and 15m each including a circumferential groove portion 16. The tire further comprises bead apex rubbers 8 each extending from respective one of beadcores 5 and each of the bead apex rubbers 8 includes an extended portion 8B extending to a position on an inner side in a tire axial direction of a first reference line x1 perpendicular to the groundcontacting surface S of each of the shoulder blocks 13s and passing through the circumferential groove portion 16 of each of the shoulder blocks 13s.

Description

technical field [0001] The present invention relates to a motorcycle tire for uneven ground with improved cornering performance. Background technique [0002] Patent Document 1 below proposes a tire for motorcycles for rough terrain that is excellent in shock absorbing performance and cornering performance. [0003] This proposed tire has a plurality of blocks (including shoulder blocks) standing up from the main body outer surface of the tread and a bead apex extending from the bead core toward the radially outer side. The radially outer end of the bead apex terminates between the boundary end and the intersection point. The boundary end is defined as the axially outer end of the tire on the boundary surface between the main body outer surface of the tread and the shoulder blocks. In addition, the intersection point is defined as a point where a straight line passing through the tire axially outer end of the tread of the shoulder block and extending perpendicularly to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C15/06B60C15/00B60C11/11
CPCB60C15/06B60C15/0009B60C11/11B60C2200/14B60C15/0045B60C15/04B60C2200/10B60C11/0309B60C11/1259B60C11/01B60C2015/061
Inventor 宫崎友
Owner SUMITOMO RUBBER IND LTD
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