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    Hydraulic control device for working machine
    33.
    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

    申请人： KOBELCO CONSTRUCTION MACHINERY CO., LTD.

    发明人： Toji, Yutaka ,  Oka, Hidekazu

    IPC分类号： F15B11/042 ,  F15B11/16 ,  E02F9/22 ,  F15B20/00

    CPC分类号： F15B20/008 ,  E02F9/2228 ,  E02F9/2235 ,  E02F9/226 ,  E02F9/2282 ,  F15B11/0423 ,  F15B2211/20553 ,  F15B2211/30525 ,  F15B2211/3056 ,  F15B2211/3122 ,  F15B2211/3127 ,  F15B2211/329 ,  F15B2211/40515 ,  F15B2211/428 ,  F15B2211/45 ,  F15B2211/50536 ,  F15B2211/5151 ,  F15B2211/55 ,  F15B2211/6652 ,  F15B2211/6654 ,  F15B2211/7053 ,  F15B2211/7058 ,  F15B2211/71 ,  F15B2211/7741

    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。

    HYDRAULISCHER ANTRIEB MIT MEHREREN AUCH EINEN DIFFERENTIALZYLINDER UMFASSENDEN HYDRAULISCHEN VERBRAUCHERN
    37.
    发明授权
    HYDRAULISCHER ANTRIEB MIT MEHREREN AUCH EINEN DIFFERENTIALZYLINDER UMFASSENDEN HYDRAULISCHEN VERBRAUCHERN 有权
    具有多也是一个差动缸综合液压消耗液压驱动

    公开(公告)号：EP1181458B1

    公开(公告)日：2004-02-25

    申请号：EP00940261.1

    申请日：2000-05-23

    申请人： Bosch Rexroth AG

    发明人： PÜSCHEL, Reiner

    IPC分类号： F15B11/16 ,  B29C45/68

    CPC分类号： F15B21/14 ,  B29C45/82 ,  B29C2045/828 ,  F04B49/002 ,  F04B49/08 ,  F15B11/162 ,  F15B11/17 ,  F15B2211/20553 ,  F15B2211/3057 ,  F15B2211/3059 ,  F15B2211/3111 ,  F15B2211/327 ,  F15B2211/6309 ,  F15B2211/6654

    摘要： The invention relates to a hydraulic drive having several hydraulic consumers (10, 40, 41, 42, 43) also comprising a differential cylinder (10) and located especially in a plastic injection molding machine. A first (25) and a second (26) hydraulic machines are provided, both of which can operate as a pump and as a motor. The first of the two hydraulic machines is connected to a tank (30) by means of a second connection (29) and communicates with a pressure line (19) by means of a first connection (28). The pressure line can be connected to the working chamber (13) of the differential cylinder located on the rear side of the piston rod by means of a check valve (17). The second hydraulic machine is also connected to the pressure line by means of a first connection (32) and can be connected by means of a second connection (33) to a tank via a non-return valve (34) that opens in the direction of the second connection and to the working chamber (14) of the differential cylinder located on the rear side of the piston rod. According to the invention, both hydraulic machines (25, 26) can also be used to supply pressurized medium to at least one additional hydraulic consumer (40, 41, 42, 43). To this end, the at least one additional consumer can be connected to the pressure line by means of the distributing valve (44, 45, 46, 47).

    HYDRAULIC CONTROL CIRCUIT OF BOOM CYLINDER OF WORKING MACHINE
    38.
    发明公开
    HYDRAULIC CONTROL CIRCUIT OF BOOM CYLINDER OF WORKING MACHINE 有权
    HYDRAULISCHER STEUERKREISFÜREINEN AUSLEGERZYLINDER EINER BAUMSCHINE

    公开(公告)号：EP1375759A1

    公开(公告)日：2004-01-02

    申请号：EP01273679.9

    申请日：2001-12-14

    申请人： Shin Caterpillar Mitsubishi Ltd.

    发明人： YOSHINO, T. c/o Shin Caterpillar Mitsubishi Ltd. ,  SHIMADA, Y. c/o Shin Caterpillar Mitsubishi Ltd.

    IPC分类号： E02F9/22 ,  F15B11/02 ,  F15B11/024

    CPC分类号： F15B11/024 ,  E02F9/2203 ,  E02F9/2228 ,  E02F9/2282 ,  F15B2211/30525 ,  F15B2211/3058 ,  F15B2211/3116 ,  F15B2211/31576 ,  F15B2211/329 ,  F15B2211/6313 ,  F15B2211/6316 ,  F15B2211/6346 ,  F15B2211/6355 ,  F15B2211/6654 ,  F15B2211/78

    摘要： The invention relates to a hydraulic control circuit of a boom cylinder for a work machine, which, when controlling supply and discharge of pressurized oil with respect to a boom cylinder, improves fuel efficiency, work efficiency in combined operations, and improves work efficiency and operationality in work of difficult boom operations such as debris raking-up work and bumping work, etc., wherein the hydraulic control circuit of a boom cylinder 8 is provided with a first change valve 19 for holding the boom control valve 13 in the neutral position N, a communication line E for causing the head side oil chamber 8a and the rod side oil chamber 8b to communicate with each other, an opening and closing valve 18 for opening and closing the communication line, and a pilot operating check valve 20 that is changed to an unidirectional state where, although an oil flow from the head side oil chamber to the rod side oil chamber is permitted, a reverse flow is hindered, and a bi-directional state is permitted where oil flows in both directions.

    摘要翻译： 本发明涉及一种用于作业机械的动臂缸的液压控制回路，其在控制压力油相对于动臂缸的供给和排出时，提高了燃油效率，组合操作中的工作效率，并提高了工作效率和操作性 在诸如碎屑耙作业和碰撞作业等困难的斗杆操作的工作中，其中动臂缸8的液压控制回路设置有用于将动臂控制阀13保持在中立位置N的第一换向阀19 用于使头侧油室8a和杆侧油室8b相互连通的通信线E，用于打开和关闭通信线路的打开和关闭阀18以及改变的先导操作止回阀20 到单向状态，其中虽然允许从头侧油室到杆侧油室的油流动，但是逆流被阻碍，并且双向sta 石油在双向流动时允许使用。

    Hydraulic circuit for construction machine
    39.
    发明公开
    Hydraulic circuit for construction machine 有权
    Hydraulischer Schaltkreis einer Arbeitsmaschine

    公开(公告)号：EP1172565A3

    公开(公告)日：2003-11-12

    申请号：EP01302794.1

    申请日：2001-03-26

    申请人： SHIN CATERPILLAR MITSUBISHI LTD.

    发明人： Shimada, Yoshiyuki, c/o Shin Caterpillar Mit. Ltd.

    IPC分类号： F15B11/16 ,  E02F9/22

    CPC分类号： F15B11/162 ,  E02F9/2228 ,  E02F9/2292 ,  F15B2211/20576 ,  F15B2211/40515 ,  F15B2211/4053 ,  F15B2211/428 ,  F15B2211/455 ,  F15B2211/50563 ,  F15B2211/528 ,  F15B2211/57 ,  F15B2211/6313 ,  F15B2211/6355 ,  F15B2211/6654 ,  F15B2211/7142 ,  F15B2211/781

    摘要： To provide a way to ensure the supply of a necessary amount of hydraulic fluid to the established actuator circuits even if the pressure in the independent attachment circuit becomes excessively high. Hydraulic fluid fed from hydraulic pumps 2,3 is controlled by means of established actuator circuits 5,6 to operate established actuators of a construction machine. A flow dividing control valve 10 causes a part of the hydraulic fluid fed to the established actuator circuits 5,6 to branch off and be fed to the independent attachment circuit 7 with its amount controlled by variable throttles 39,40, thereby driving the attachment of the construction machine. Pressure compensation valves 11,12 respectively control the variable throttles 39,40 of the flow dividing control valve 10 to maintain a constant differential pressure between the inlet and the outlet of each variable throttle. When a controller 53 detects by a pressure sensor 51 that the circuit pressure in the independent attachment circuit 7 has increased to an excessively high level, the controller 53 controls an electromagnetic proportional control valve 57 regardless of operation signals from an attachment operation lever 54 so as to reduce the aperture areas of the variable throttles 39,40 of the flow dividing control valve 10.

    摘要翻译： 为了提供一种确保向所建立的致动器电路供应必要量的液压流体的方法，即使独立安装回路中的压力变得过高。 从液压泵2,3供给的液压油通过已建立的执行器电路5,6来控制，以操作建筑机械的已建立的致动器。 分流控制阀10使得供给到已建立的致动器电路5,6的液压流体的一部分分支并且被供给到独立的附接回路7，其量由可变节流阀39,40控制，由此驱动附件 施工机械。 压力补偿阀11,12分别控制分流控制阀10的可变节流阀39,40，以在每个可变节气门的入口和出口之间保持恒定的差压。 当控制器53由压力传感器51检测到独立安装回路7中的回路压力升高到过高时，控制器53控制电磁比例控制阀57，而与来自安装操纵杆54的操作信号无关，因此 以减小分流控制阀10的可变节流孔39,40的孔径面积

    Method and apparatus for controlling fluid pressure in a hydraulically-actuated device
    40.
    发明公开
    Method and apparatus for controlling fluid pressure in a hydraulically-actuated device 审中-公开
    Verfahren und Einrichtung zur Druckregelung在einer hydraulischbetätigtenVorrichtung

    公开(公告)号：EP1231387A2

    公开(公告)日：2002-08-14

    申请号：EP02090049.4

    申请日：2002-02-06

    申请人： HydraForce, Inc.

    发明人： Cannestra, Michael

    IPC分类号： F15B21/08 ,  F15B11/16

    CPC分类号： F15B11/165 ,  F15B21/08 ,  F15B2211/20538 ,  F15B2211/20546 ,  F15B2211/305 ,  F15B2211/3111 ,  F15B2211/31576 ,  F15B2211/327 ,  F15B2211/50518 ,  F15B2211/526 ,  F15B2211/6336 ,  F15B2211/634 ,  F15B2211/6346 ,  F15B2211/6653 ,  F15B2211/6654

    摘要： A method and system for controlling fluid pressure in a hydraulically actuated device is provided, in which the device receives an input indicating the amount of work that the device is to perform, and the threshold pressure of a relief valve (16) is adjusted so that the pressure of the fluid is appropriate for the amount of work indicated by the input. In one implementation, the device receives a user input representing the amount of work to be performed by the device. Based on the user input, a setting for a relief valve (16) that is sufficient to maintain the fluid pressure at a level appropriate for the amount of work required is determined. An electrical signal is then sent to the relief valve (16) to adjust it to the determined setting. Determining the proper setting for the relief valve (16) may involve referencing a look-up table that maps user input values to electrical signal values. It may also involve calculating the value of the signal needed to adjust the relief valve (16) to the determined setting, by, for example, inputting the value of the user input into a function and obtaining the signal value as a result.

    摘要翻译： 提供了一种用于控制液压致动装置中的流体压力的方法和系统，其中装置接收指示装置要执行的工作量的输入，并且调节安全阀（16）的阈值压力，使得 流体的压力适合于由输入指示的工作量。 在一个实现中，设备接收表示由设备执行的工作量的用户输入。 基于用户输入，确定足以将流体压力保持在适合所需工作量的水平的安全阀（16）的设定。 然后将电信号发送到安全阀（16）以将其调整到所确定的设置。 确定安全阀（16）的正确设置可能涉及参考将用户输入值映射到电信号值的查找表。 还可以包括通过例如将用户输入的值输入到功能中并且作为结果获得信号值来计算将安全阀（16）调节到所确定的设置所需的信号的值。