PROBLEM TO BE SOLVED: To provide a hydraulic driving device for a cargo handling vehicle capable of suppressing variation in a lowering speed of a lifting hydraulic cylinder.SOLUTION: A command rotation speed deceleration Ab which is a deceleration of a commanded rotation speed set in a command rotation speed setting part 67 is larger than an actual rotation speed deceleration Bb which is a deceleration of an actual rotation speed of an electric motor 18 by control output of a motor driver 61. Since the actual rotation speed deceleration Bb is smaller than the command rotation speed deceleration Ab, the actual rotation speed can be gently reduced. Therefore, a reduction in cylinder flow rate can be suppressed gently in accordance with the reduction in the actual rotation speed. Since the command rotation speed deceleration Ab is larger than the actual rotation speed deceleration Bb, the command rotation speed can be immediately reduced. Therefore, the actual rotation speed becomes equal to the command rotation speed immediately so that an increase in actual rotation speed can be suppressed. Accordingly, an increase in the cylinder flow rate can be suppressed.SELECTED DRAWING: Figure 4

    【課題】昇降用の油圧シリンダの下降速度の変動を抑制することができる荷役車両の油圧駆動装置を提供する。【解決手段】指令回転数設定部67で設定される指令回転数の減速度である指令回転数減速度Abは、モータドライバ61の制御出力による電動モータ18の実回転数の減速度である実回転数減速度Bbに比して大きい。実回転数減速度Bbが指令回転数減速度Abよりも小さいため、実回転数を緩やかに低下させることができる。従って、シリンダ流量の低下を実回転数の低下に合わせて緩やかに抑えることができる。指令回転数減速度Abが実回転数減速度Bbよりも大きいため、指令回転数を速やかに低下させることができる。従って、実回転数が速やかに指令回転数と等しくなり、実回転の上昇を抑えることができる。それに伴い、シリンダ流量の増加を抑えることができる。【選択図】図4


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    Title :

    HYDRAULIC DRIVING DEVICE FOR CARGO HANDLING VEHICLE


    Additional title:

    荷役車両の油圧駆動装置


    Contributors:

    Publication date :

    2018-05-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last



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