PROBLEM TO BE SOLVED: To provide an upright type front fork capable of improving responsibility of a reaction force against a compression stroke and an extention stroke.SOLUTION: This invention relates to an upright type front fork 1 including an attenuation force generating mechanism in which a vehicle body side inner tube 3 is supported by guide bushings 4, 5 fitted to an upper part and a lower part of an inner circumference of an axle side outer tube 2 in such a way that it can be slide upwardly and downwardly, oil is filled within the outer tube 2 and the inner tube 3 to form an air chamber Sa at the upper part in the inner tube 3 and an attenuation force is generated by fluid resistance of oil accompanied with extending or retracting motion of the outer tube 3 and the inner tube 3. A fitting surface of the guide bushing 5 below the inner circumference of the outer tube 2 is formed with a vertical groove 21 communicating an annular clearance defined by the outer tube 2, the inner tube and upper and lower guide bushings with the inside part of the outer tube 3.

    【課題】圧縮及び伸長ストロークに対する反力の応答性を高めることができる正立型フロントフォークを提供すること。【解決手段】車軸側のアウタチューブ2の内周の上下に嵌着されたガイドブッシュ4,5によって車体側のインナチューブ3を上下摺動可能に支持するとともに、アウタチューブ2とインナチューブ3の内部にオイルを封入してインナチューブ3内の上部にエア室Saを形成し、アウタチューブ2とインナチューブ3の伸縮動に伴うオイルの流動抵抗によって減衰力を発生する減衰力発生機構を備えた正立型フロントフォーク1において、前記アウタチューブ2内周の下側の前記ガイドブッシュ5の嵌着面に、前記アウタチューブ2と前記インナチューブ及び上下の前記ガイドブッシュによって画成される環状隙間と前記アウタチューブ3の内部とを連通させる縦溝21を形成する。【選択図】図1


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    Titel :

    UPRIGHT TYPE FRONT FORK AND WHEEL SUSPENSION DEVICE WITH UPRIGHT TYPE FRONT FORK


    Weitere Titelangaben:

    正立型フロントフォークとこれを備える車輪懸架装置


    Beteiligte:

    Erscheinungsdatum :

    05.10.2015


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B62K Fahrräder , CYCLES / F16F SPRINGS , Federn



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