To provide an undercarriage that is equipped with an expansion/contraction mechanism and suppresses deformation when a suspended cargo is suspended from a revolving super structure in front of or behind the undercarriage.SOLUTION: Each of a plurality of coupling members is configured to permit the displacement of a crawler frame from an expansion position to a contraction position by changing a relative position with respect to at least one of a car body and the crawler frame from an expansion connection state while being connected to at least the one of the car body and the crawler frame, and is disposed in a restraint state in which it is restrained by the crawler frame and the car body disposed at the contraction position.SELECTED DRAWING: Figure 3

    【課題】拡縮機構を備えながら、下部走行体よりも前側又は後側において吊り荷が上部旋回体から吊るされたときの変形が小さい下部走行体を提供する。【解決手段】複数の連結部材のそれぞれは、カーボディ及びクローラフレームの少なくとも一方に接続されたままでカーボディ及びクローラフレームの少なくとも一方に対する相対位置が拡大接続状態から変化することによりクローラフレームが拡大位置から縮小位置に変位することを許容し、縮小位置に配置されたクローラフレーム及びカーボディにより拘束される状態である拘束状態で配置されることが可能なように構成される。【選択図】図3


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    Title :

    UNDERCARRIAGE OF MOBILE CRANE


    Additional title:

    移動式クレーンの下部走行体


    Contributors:

    Publication date :

    2022-12-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES / B62D MOTOR VEHICLES , Motorfahrzeuge / E02F Baggern , DREDGING



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