To provide a counterweight system of an improved movable lift crane.SOLUTION: A lift crane 710 includes a car body 712 and a movable ground engaging member 714 mounted on the car body 712. A rotary floor 720 is rotatably connected to the car body 712 and includes a rack directly coupled to a lower surface of a counterweight support frame 732 of the rotary floor 720. A counterweight unit 735 includes a trolley and is movable with respect to the rotary floor 720. A counterweight moving device is configured such that the counterweight unit 735 is moved in a direction getting closer to a boom and in a direction getting away from the boom. The counterweight moving device includes at least one motor for driving a first gear connected to the trolley such that the trolley is moved with respect to the rotary floor 720 when the first gear is rotated by the motor.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、回転床720のカウンタウエイト支持フレーム732の下面に直接結合されたラックを含む。カウンタウエイトユニット735はトロリーを含み、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 INCLUDING 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 :

    2021-07-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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