A lift crane includes a carbody and movable ground engaging members mounted on the carbody. A rotating bed is rotatably connected to the carbody and includes a counterweight support frame including a rack coupled directly to a lower surface of the rotating bed. A boom is pivotally mounted to the rotating bed. A counterweight unit movement device is configured to move the counterweight unit toward and away from the boom. At least one auxiliary member includes a counterweight pad that is configured to not touch the ground during a pick, move, and set operation. A linear actuator is configured to adjust a distance that the counterweight pad is above the ground.

    L'invention concerne une grue de levage comprenant une carrosserie et des éléments de contact au sol mobiles montés sur la carrosserie. Un plateau tournant est connecté en rotation à la carrosserie et comprend un cadre de support de contrepoids comprenant un râtelier couplé directement à une surface inférieure du plateau tournant. Une flèche est montée pivotante sur le plateau tournant. Un dispositif de mouvement d'unité de contrepoids est conçu pour déplacer l'unité de contrepoids vers la flèche ou l'écarter de celle-ci. Au moins un élément auxiliaire comprend un plateau de contrepoids conçu pour ne pas entrer en contact avec le sol pendant un prise, un mouvement et une opération définie. Un actionneur linéaire est conçu pour ajuster la distance à laquelle le plateau de contrepoids se situe au-dessus du sol.


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    Title :

    HEIGHT ADJUSTMENT MECHANISM FOR AN AUXILIARY MEMBER ON A CRANE


    Additional title:

    MÉCANISME D'AJUSTEMENT DE HAUTEUR POUR UN ÉLÉMENT AUXILIAIRE SUR UNE GRUE



    Publication date :

    2015-10-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES



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