Hydraulic control apparatus for hydraulic excavators
    2.
    发明公开
    Hydraulic control apparatus for hydraulic excavators 审中-公开
    Hydraulischer Steuerkreis fuer Bagger

    公开(公告)号:EP1743980A2

    公开(公告)日:2007-01-17

    申请号:EP06116314.3

    申请日:2006-06-29

    发明人: Oka, Hidekazu

    IPC分类号: E02F9/22

    摘要: A first group (G1) is supplied with hydraulic power from a first hydraulic pump (7). In the first group (G1), an arm control valve (12) is disposed at the most downstream position. A throttle (20) is provided at the entrance of the arm control valve. Thus, a circuit is configured to give priority to boom raising or bucket excavation. During a combined operation, according to the operation amount of boom pulling or bucket excavation, a controller (35) decreases the upper limit of the discharge amount of the first hydraulic pump (7) determined by the operation amount of arm pulling and increases the recycling rate of oil to the expansion side of an arm cylinder (4).

    摘要翻译: 第一组(G1)由第一液压泵(7)供给液压动力。 在第一组(G1)中,臂控制阀(12)设置在最下游位置。 在臂控制阀的入口处设有节流阀(20)。 因此,电路被配置为优先考虑吊杆升高或铲斗挖掘。 在组合动作中,根据动臂牵引或铲斗挖掘的操作量,控制器(35)减少由手臂拉动的操作量确定的第一液压泵(7)的排出量的上限,并且增加回收 油流到臂缸(4)的膨胀侧。

    Hydraulic control apparatus of working machine
    3.
    发明公开
    Hydraulic control apparatus of working machine 审中-公开
    工作机械的液压控制装置

    公开(公告)号:EP1830066A3

    公开(公告)日:2017-07-19

    申请号:EP07103320.3

    申请日:2007-03-01

    摘要: With respect to a method of controlling a pump flow rate of a hydraulic pump, a method having a small flow rate command value is selected between a pressure feedback control for controlling the pump flow rate based on a set pressure (a cutoff pressure) and a pump pressure, and, an ordinary control for controlling the pump flow rate based on operation information, and in a case that the pressure feedback control is selected, a flow rate increasing control for increasing the flow rate command value after the case with the passage of time is performed.

    摘要翻译: 关于控制液压泵的泵流量的方法,在用于基于设定压力(截止压力)控制泵流量的压力反馈控制和用于控制基于设定压力的泵流量的压力反馈控制(截止压力)之间选择具有小流量命令值的方法 根据运转信息控制泵流量的通常控制,在选择了压力反馈控制的情况下进行流量增加控制,以使流量指令值增加 时间被执行。

    Hydraulic control device for hydraulic excavator
    5.
    发明公开
    Hydraulic control device for hydraulic excavator 有权
    Hydraulische SteuervorrichtungfürHydraulikbagger

    公开(公告)号:EP1577447A1

    公开(公告)日:2005-09-21

    申请号:EP05102015.4

    申请日:2005-03-15

    发明人: Oka, Hidekazu

    IPC分类号: E02F9/22

    摘要: A hydraulic control system comprising a boom control valve (7) in a first oil path (LCB) providing oil from a first hydraulic pump (2) to a boom cylinder (13), an arm control valve (10) in a second oil path (RCB) for providing oil from a second hydraulic pump (3) to an arm cylinder (16), a confluence switching valve (17) having a position (b) for joining the paths and a position (a) for stopping the confluence, a flow control valve (18) for returning pressure oil in the first oil path to a tank (28), and a control means (24,34) for switching the confluence switching valve to the confluence position and closing the flow control valve when the arm operating means (25) is operated independently and for switching the confluence switching valve to the confluence stop position and opening the flow control valve when the arm and boom operating means (25,22) are operated simultaneously.

    摘要翻译: 本发明的液压挖掘机的液压控制系统包括:第一油路中的起重臂控制阀,用于根据动臂操作装置的操作从第一液压泵提供压力油与动臂缸;动臂控制阀, 第二油路,用于根据臂操作装置的操作从具有臂缸的第二液压泵提供压力油;具有用于接合路径的汇合位置的汇合切换阀和用于停止汇合的汇合停止位置;流量控制 用于将第一油路中的压力油返回到罐的阀,以及用于控制阀的控制装置,以便当臂操作装置独立地操作时将汇流切换阀切换到汇合位置并关闭流量控制阀, 以便将汇流切换阀切换到汇合停止位置,并且当两个操作的操作都打开时,打开流量控制阀 ns同时运行,从而独立地进行手臂牵引操作,臂缸速度增加,并且调平效率提高。

    Hydraulic control device for working machine
    7.
    发明公开
    Hydraulic control device for working machine 有权
    工作机械的液压控制装置

    公开(公告)号:EP1577563A3

    公开(公告)日:2005-12-28

    申请号:EP05102017.0

    申请日:2005-03-15

    摘要: A hydraulic control device for a working machine includes hydraulic actuators (1,2,3), a hydraulic pump (10) which functions as a hydraulic power source, control valves (7,8,9) which control the actuators on the basis of operations by an operating unit, a common bleed-off valve (15) which returns excess oil to a tank via an unload passage on the basis of the operations by the operating unit, and a control unit (17) which controls the common bleed-off valve. The common bleed-off valve (15) is capable of setting a position for closing the unload passage when the common bleed-off valve is in a non-operating state. The control valves (7,8,9) have center bypass passages which function as individual bleed-off passages which open when the control valves are in neutral states. Opening characteristics of the control valves are set such that the center bypass passages are closed in initial stroke periods in which the control valves move toward operating positions.

    摘要翻译: 一种作业机械的液压控制装置,其特征在于,具有液压执行机构(1,2,3),作为液压动力源发挥功能的液压泵(10),根据液压执行机构控制执行机构的控制阀(7,8,9) 根据操作单元的操作,通过操作单元的操作,经由卸载通道将过量的油返回到箱的通用泄放阀(15),以及控制单元(17) 关阀。 当普通泄放阀处于非工作状态时,普通泄放阀(15)能够设定用于关闭卸载通道的位置。 控制阀(7,8,9)具有中心旁路通道,其起到当控制阀处于中立状态时打开的单独泄放通道的作用。 控制阀的打开特性设定为使得在控制阀向操作位置移动的初始行程期间中心旁路通道关闭。

    Hydraulic control system for working machine
    8.
    发明公开
    Hydraulic control system for working machine 有权
    工作机械的液压控制系统

    公开(公告)号:EP1577564A2

    公开(公告)日:2005-09-21

    申请号:EP05102016.2

    申请日:2005-03-15

    摘要: A hydraulic control system for a working machine according to the present invention includes a regulator control valve for controlling an operation of a pump regulator and a controller for sending a control signal for changing a discharge quantity of the pump to the regulator control valve in accordance with an operation amount of an operating means. On the basis of the control signal, a secondary pressure in the regulator control valve is fed to the pump regulator. This system further includes a fail-safe valve disposed in a control line joining the pump regulator and the regulator control valve. The fail-safe valve has an ordinary position for sending the secondary pressure to the pump regulator and a fail-safe position for sending an oil pressure from a path other than the regulator control valve to the pump regulator in such a manner that a predetermined discharge amount is ensured. The fail-safe valve is configured so as to switch from the ordinary position to the fail-safe position in accordance with a failure signal indicative of failure in the regulator control valve. According to this, while adopting an electronic control system for the pump, it is possible to continue a work even in the failed condition of the system.

    摘要翻译: 根据本发明的用于工作机械的液压控制系统包括用于控制泵调节器的操作的调节器控制阀和用于根据下述信号发送用于改变泵的排出量的控制信号到调节器控制阀的控制器: 操作装置的操作量。 基于控制信号,调节器控制阀中的次级压力被供应给泵调节器。 该系统还包括布置在连接泵调节器和调节器控制阀的控制线中的故障安全阀。 故障安全阀具有用于将次级压力发送到泵调节器的普通位置和用于从调节器控制阀以外的路径将油压发送到泵调节器的故障 - 安全位置,使得预定的放电 数量得​​到保证。 根据指示调节器控制阀故障的故障信号,故障安全阀被配置为从常规位置切换到故障安全位置。 据此,当泵采用电子控制系统时,即使在系统发生故障的情况下也可以继续工作。