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公开(公告)号：EP3444484A1
公开(公告)日：2019-02-20
申请号：EP18187228.4
申请日：2018-08-03
摘要： A hydraulic driving device of an industrial vehicle includes: a tank which stores hydraulic oil; a hydraulic pump which includes a suction port sucking the hydraulic oil and a discharge port discharging the hydraulic oil; a hydraulic cylinder which is driven by the hydraulic oil discharged from the discharge port of the hydraulic pump; a direction switching valve which is disposed among the hydraulic pump, the tank, and the hydraulic cylinder and switches a hydraulic oil flow direction in response to an operation state of operation means for driving the hydraulic cylinder; in which the direction switching valve includes a main spool which moves in response to the operation state of the operation means and a flow regulator which is disposed inside the main spool to control a flow rate of the hydraulic oil flowing from the hydraulic cylinder to the tank.
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公开(公告)号：EP2818446B1
公开(公告)日：2016-05-04
申请号：EP14172280.1
申请日：2014-06-13
CPC分类号： F04B35/045 , B60L1/003 , B60L1/20 , B60L2200/42 , B60L2240/36 , B66F9/22 , F15B21/14 , F15B2211/20515 , F15B2211/20538 , F15B2211/20569 , F15B2211/30595 , F15B2211/40569 , F15B2211/41572 , F15B2211/4159 , F15B2211/50536 , F15B2211/7142 , F15B2211/88
摘要： A hydraulic drive device (16) for cargo handling vehicle has: a tank (19); a pump (17) for drawing in a hydraulic oil from the tank and supplying the hydraulic oil to hydraulic cylinders; an electric motor (18) for driving the pump; a solenoid-controlled proportional valve (48) disposed between an inlet port of the pump and a bottom chamber of an up-and-down hydraulic cylinder (4) and configured to open with a valve travel depending upon a control input of a descent control of an up-and-down control member; a pressure compensation valve (50) disposed between a branch portion located between the pump and the solenoid-controlled proportional valve and the tank and configured to open with a valve travel depending upon a pressure difference between pressures upstream and downstream of the solenoid-controlled proportional valve; and a valve (53) disposed between the pressure compensation valve and the tank and configured to be switched between an open position and a close position.
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3.发明公开Hydraulic drive device for cargo handling vehicle 有权Hydraulisch angetriebene VorrichtungfürFrachtumschlagfahrzeug
公开(公告)号：EP2818446A1
公开(公告)日：2014-12-31
申请号：EP14172280.1
申请日：2014-06-13
CPC分类号： F04B35/045 , B60L1/003 , B60L1/20 , B60L2200/42 , B60L2240/36 , B66F9/22 , F15B21/14 , F15B2211/20515 , F15B2211/20538 , F15B2211/20569 , F15B2211/30595 , F15B2211/40569 , F15B2211/41572 , F15B2211/4159 , F15B2211/50536 , F15B2211/7142 , F15B2211/88
摘要： A hydraulic drive device (16) for cargo handling vehicle has: a tank (19); a pump (17) for drawing in a hydraulic oil from the tank and supplying the hydraulic oil to hydraulic cylinders; an electric motor (18) for driving the pump; a solenoid-controlled proportional valve (48) disposed between an inlet port of the pump and a bottom chamber of an up-and-down hydraulic cylinder (4) and configured to open with a valve travel depending upon a control input of a descent control of an up-and-down control member; a pressure compensation valve (50) disposed between a branch portion located between the pump and the solenoid-controlled proportional valve and the tank and configured to open with a valve travel depending upon a pressure difference between pressures upstream and downstream of the solenoid-controlled proportional valve; and a valve (53) disposed between the pressure compensation valve and the tank and configured to be switched between an open position and a close position.
摘要翻译： 用于货物处理车辆的液压驱动装置（16）具有：罐（19）; 用于从油箱中抽出液压油并将液压油供给液压缸的泵（17）; 用于驱动所述泵的电动机（18）; 设置在泵的入口和上下液压缸（4）的底部室之间的电磁控制比例阀（48），其构造成根据下降控制器的控制输入以阀行程打开 一个上下控制的成员; 压力补偿阀（50），其设置在位于泵和电磁控制的比例阀之间的分支部分和罐之间，并且构造成根据电磁控制比例的上游和下游的压力差与阀行程打开 阀; 以及阀（53），其配置在所述压力补偿阀和所述箱体之间并构造成在打开位置和关闭位置之间切换。
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