PROBLEM TO BE SOLVED: To provide an upright front fork capable of increasing a responsiveness of air reaction force against a compression stroke and an extension stroke.SOLUTION: This invention relates to an upright front fork 1 including an attenuation force generating mechanism for generating attenuation force by a flow resistance of oil as an outer tube 2 and an inner tube 3 are extended or retracted by supporting the inner tube 3 in an upward or downward slidable manner by guide bushes 4, 5 fitted to an upper part and a lower part of an inner circumference of the outer tube 2, filling oil inside of each of the outer tube 2 and the inner tube 3 to form an air chamber Sa at the upper part within the inner tube 3. The side wall of the inner tube 3 is formed with a lateral hole 21 for communicating an annular clearance Sδ defined by the outer tube 2 and the inner tube 3 as well as the upper and lower guide bushes 4, 5 with the inside of the inner tube 3.

    【課題】圧縮及び伸長ストロークに対するエア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】アウタチューブ2内周の上下に嵌着されたガイドブッシュ4,5によってインナチューブ3を上下摺動可能に支持するとともに、前記アウタチューブ2と前記インナチューブ3の内部にオイルを封入して前記インナチューブ3内の上部にエア室Saを形成し、前記アウタチューブ2と前記インナチューブ3の伸縮動に伴う前記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、前記インナチューブ3の側壁に、前記アウタチューブ2と前記インナチューブ3及び上下の前記ガイドブッシュ4,5によって画成される環状隙間Sδと前記インナチューブ3の内部とを連通させる横孔21を形成する。【選択図】図1


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    Title :

    UPRIGHT FRONT FORK AND WHEEL SUSPENSION DEVICE WITH UPRIGHT FRONT FORK


    Additional title:

    正立型フロントフォークとこれを備える車輪懸架装置


    Contributors:

    Publication date :

    2015-09-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16F SPRINGS , Federn / B62K Fahrräder , CYCLES



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