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    • 2. 发明专利
    • Hydraulic driving device for working machine
    • 液压驱动装置
    • JP2013124763A
    • 2013-06-24
    • JP2011275726
    • 2011-12-16
    • Kobelco Cranes Co Ltdコベルコクレーン株式会社Kobe Steel Ltd株式会社神戸製鋼所
    • KONDO DAIYUMICHIDA TAKAHARUYAMAGATA KATSUMIHORI NAOTOKITAKADO NAOYAMAEKAWA TOMOHITOSUGANO NAOKI
    • F15B11/04B66D1/44F15B11/08
    • F15B9/08F15B11/044F15B21/047F15B2211/3116F15B2211/3157F15B2211/329F15B2211/353F15B2211/46F15B2211/7058F15B2211/75F15B2211/761F15B2211/8609
    • PROBLEM TO BE SOLVED: To provide a hydraulic driving device for working machine, preventing an excessive decrease in pressure on a meter-in side and moving a load at a stable speed in a lowering direction, without using a counterbalance valve.SOLUTION: The hydraulic driving device for working machine includes: a hydraulic pump 2; a hydraulic actuator 4 which is driven in a direction of lowering a load; an operation device 6 which is operated in order to specify operation speed; a working hydraulic circuit including a meter-in flow passage for guiding hydraulic oil to the hydraulic actuator when driven in the direction of lowering the load and a meter-out flow passage for guiding the hydraulic oil discharged from the hydraulic actuator to a tank; a control valve 5 which changes the supply state of the hydraulic oil so as to actuate the hydraulic actuator at a speed specified by the operation device; meter-in flow adjusters 3, 9 and a meter-out flow adjuster 10 which adjust a meter-in flow rate and meter-out flow rate to flow rates corresponding to the speeds specified by the operation devices respectively; and a relief valve 16.
    • 要解决的问题:为了提供一种用于作业机械的液压驱动装置,在不使用平衡阀的情况下,防止在进入侧的压力的过度降低和以下降方向以稳定的速度移动负载。 解决方案:工作机械的液压驱动装置包括:液压泵2; 液压致动器4,其在降低负载的方向上被驱动; 操作装置6,其操作以指定操作速度; 工作液压回路,其包括用于在将液压致动器沿着降低负载的方向驱动时将液压油引导到液压致动器的流入通道,​​以及用于将从液压致动器排出的液压油引导到罐的出口流路; 控制阀5,其改变液压油的供给状态,以便以由操作装置指定的速度致动液压致动器; 流量调节器3,9和流出量流量调节器10,其将流量和流出流量调节到分别对应于由操作装置指定的速度的流量; 和安全阀16.版权所有(C)2013,JPO&INPIT