Provided is a jack device (20) rendering an operation of changing the posture of a jack cylinder (41) easy without using a device that actively changes the posture. The jack device (20) includes an arm (30), a jack body (40) including the jack cylinder (41), and a reaction-force application unit (60) supported by the arm (30). The reaction-force application unit (60) makes a reaction-force moment act on the jack body (40) in all postures from the upright posture to the storage posture in response to a force applied from the jack body (40). The reaction-force application unit (60) makes a reaction-force moment (Mr) greater than a self-weight moment (Ms) act on the jack body (40) in the storage posture and makes a reaction-force moment (Mr) smaller than the self-weight moment (Ms) act on the jack body (40) in the upright posture.


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    Titel :

    JACK DEVICE AND WORK MACHINE EQUIPPED WITH SAME


    Weitere Titelangaben:

    BUCHSENVORRICHTUNG UND ARBEITSMASCHINE DAMIT
    DISPOSITIF DE VÉRIN ET MACHINE DE TRAVAIL ÉQUIPÉE DE CELUI-CI


    Beteiligte:
    ARITA RYUICHI (Autor:in)

    Erscheinungsdatum :

    26.03.2025


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    B66C Krane , CRANES / E02F Baggern , DREDGING



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