To provide an improved counterweight system of a movable lift crane.SOLUTION: A lift crane 710 includes a car body 712, and a ground surface engagement member 714 which is mounted on the car body 712 and movable. A rotary bed 720 is rotatably connected to the car body 712, and includes a flange 739 and a rack on a lower surface of the rotary bed 720 on a side opposite to the surface of the flange 739. The counterweight unit 735 includes a trolley supported on the surface of the flange 739, and is movable to the rotary bed 720. The counterweight movement device is configured so as to move the counterweight unit 735 in a direction approaching the boom and a direction away from the boom. The counterweight movement device includes at least one motor for driving a first gear connected to the trolley, when the motor rotates the first gear, the trolley is moved to the rotary bed 720.SELECTED DRAWING: Figure 63

    【課題】改良された移動式吊り上げクレーンのカウンタウエイトシステムを提供する。【解決手段】吊り上げクレーン710は、カーボディ712と該カーボディ712に取り付けられた可動の地面係合部材714を含む。回転床720はカーボディ712に回転可能に連結され、フランジ739とフランジ739の表面の反対側で回転床720の下面にあるラックを含む。カウンタウエイトユニット735はフランジ739の表面によって支持されたトロリーを含み、回転床720に対して移動可能となっている。カウンタウエイト移動装置は、カウンタウエイトユニット735をブームに向かう方向及び該ブームから離れる方向に動かすように構成されている。カウンタウエイト移動装置はトロリーに連結された第1歯車を駆動する少なくとも1つのモーターを含み、モーターが第1歯車を回転させたときにトロリーが回転床720に対して移動する。【選択図】図63


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    Title :

    LIFT CRANE WITH IMPROVED MOVABLE COUNTERWEIGHT


    Additional title:

    改良された可動式カウンタウエイトを備えた吊り上げクレーン


    Contributors:

    Publication date :

    2024-11-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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