PROBLEM TO BE SOLVED: To provide an engine stall prevention device capable of preventing occurrence of engine stall due to insufficient engine torque when switching from an unload state to an on-load state; and a crane including the engine stall prevention device.SOLUTION: A controller included in a crawler crane (corresponding to an engine stall prevention device) brings a hook relief solenoid 172a into an ON state so as to actuate a hook relief valve 172b and limit a pressure upper limit of a pressure oil to a low setting pressure lower than a main setting pressure during a normal operation, until duration time of an operation input is not less than preset setting time, according to an operation input when an operational state of a hydraulic pump 60 is an unload state.SELECTED DRAWING: Figure 3

    【課題】アンロード状態からオンロード状態へと切り換わった際のエンジントルクの不足によるエンジンストールの発生を防止し得るエンジンストール防止装置及びこれを備えるクレーンを提供する。【解決手段】クローラクレーンの備えるコントローラ(エンジンストール防止装置に対応)は、油圧ポンプ60の運転状態がアンロード状態のときの操作入力に応じて、操作入力の継続時間が予め設定した設定時間以上となるまでは、フックリリーフソレノイド172aをON状態にしてフックリリーフ弁172bを作動して圧油の圧力上限を通常作動時のメイン設定圧よりも低い低設定圧に制限する。【選択図】図3


    Access

    Download


    Export, share and cite



    Title :

    CRANE AND ENGINE STALL PREVENTION DEVICE


    Additional title:

    クレーン及びエンジンストール防止装置


    Contributors:
    SAKATA YOJI (author) / ONO MASATO (author) / MEGURO YUTA (author)

    Publication date :

    2017-08-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



    Stall protection crane

    GUO YUANJUN / GUO XINGGANG / GUO XINGTONG | European Patent Office | 2020

    Free access

    Crane stall self-locking device

    LI GUANWU / LI GUANGCHAO / LI ZHENMIN et al. | European Patent Office | 2023

    Free access

    Crane stall self-locking device

    LIANG DAWEI / XU CONGZHU / XIE YANQU et al. | European Patent Office | 2024

    Free access

    Stall protection traveling crane

    GUO YUANJUN / GUO XINGGANG / GUO XINGTONG | European Patent Office | 2020

    Free access

    Stall self-locking device for crane

    LIANG DAWEI / XU CONGZHU / XIE YANQU et al. | European Patent Office | 2024

    Free access