HYDRAULIC CONTROLLER
    42.
    发明申请
    HYDRAULIC CONTROLLER 审中-公开
    液压控制器

    公开(公告)号:WO02029256A1

    公开(公告)日:2002-04-11

    申请号:PCT/JP2001/008284

    申请日:2001-09-25

    Abstract: A hydraulic controller improved to prevent a hunching from occurring and reduce a size and used for a multiple hydraulic control system (1) having a load sensing function, comprising a PLS port allowing the maximum negative pressure in the system to be supplied therein, wherein a restriction is provided in a compensator, and a function equivalent to a check valve is provided to the restriction, the function of a shuttle valve (selector valve) is provided to the compensator, and the shuttle valve is operated independently of the compensator to always regulate a PLS.

    Abstract translation: 改进了液压控制器,以防止发生砰击并且减小尺寸并用于具有负载感测功能的多重液压控制系统(1),该多重液压控制系统(1)包括允许系统中的最大负压在其中供应的PLS端口,其中 在补偿器中设置限制,并且对限制提供与止回阀相当的功能,向补偿器提供梭阀(选择阀)的功能,并且梭阀独立于补偿器操作以总是调节 一个PLS。

    HYDRAULIC DRIVE DEVICE OF WORKING MACHINE
    44.
    发明申请
    HYDRAULIC DRIVE DEVICE OF WORKING MACHINE 审中-公开
    液压驱动装置

    公开(公告)号:WO01077532A1

    公开(公告)日:2001-10-18

    申请号:PCT/JP2001/003043

    申请日:2001-04-09

    Abstract: A hydraulic drive device of working machine, comprising a merge valve (2) connected to a directional control valve (1) of a first directional control valve group through a center bypass passage (3), a merge circuit (5) communicating the merge valve (2) with the supply port of a directional control valve for merge (4), an actuator for merge (20) controlled by the directional control valve for merge (4), and a release valve (10) releasing the merge by the merge valve (2) when the load pressure of the actuator for merge (20) exceeds a specified value, wherein a total horse power is controlled so that the total value of the input torques of two hydraulic pumps (15) and (18) does not exceed the output torque of an engine (30), whereby a merge is stopped forcibly when the load pressure of the actuator for merge where the pressure oils from two hydraulic pumps are merged with each other becomes higher than a specified pressure and the actuator for merge is driven only by the pressure oil from one hydraulic pump.

    Abstract translation: 一种工作机械的液压驱动装置,包括通过中心旁通通路(3)连接到第一方向控制阀组的方向控制阀(1)的合并阀(2),将合并阀 (2)具有用于合并的方向控制阀(4)的供给口,用于合并的方向控制阀(4)控制的用于合并的致动器(20);以及通过合并释放合并的释放阀(10) 阀门(2)当合并执行器(20)的负载压力超过规定值时,其中控制总马力,使得两个液压泵(15)和(18)的输入转矩的总值不为 超过发动机(30)的输出转矩,从而当来自两个液压泵的压力油彼此合并的合并致动器的负载压力变得高于指定压力并且用于合并的致动器时强制停止合并 仅由压力油驱动 一个液压泵。

    HYDRAULIC CIRCUIT DEVICE
    45.
    发明申请
    HYDRAULIC CIRCUIT DEVICE 审中-公开
    液压电路装置

    公开(公告)号:WO00065238A1

    公开(公告)日:2000-11-02

    申请号:PCT/JP2000/002170

    申请日:2000-04-04

    Abstract: An oil passage slit (20) that is formed in the valve disc (50) of a flow dividing valve (5-1), a control chamber (70) and oil passage (31-1) are connected to a signal transmission oil passage (9), the oil passage slit (20) being formed with a lap portion (32) having a check valve function with a lap quantity X at the shut-off position of the valve disc (50), the oil passage (31-1) having a 2-position 3-way valve (11) installed therein. The valve (11) connects the control chamber (70) of the flow dividing valve (5-1) to the signal transmission oil passage (9) alone when there is no external signal (F), while when the external signal (F) is applied, it connects the control chamber (70) both to the signal transmission oil passage (9) and to a low pressure detection oil passage (35) connected to the outlet passage (5b) of a flow dividing valve (5-2) on the side of a hydraulic actuator (3-2). This ensures that during composite operation driving an inertial body, the pressure on the low load pressure side is detected as a signal pressure without shutting off a load pressure detection oil passage on the high load pressure side and that the portion for detecting the load pressure is simplified and the flow dividing function is not impaired.

    Abstract translation: 形成在分流阀(5-1)的阀盘(50),控制室(70)和油路(31-1)中的油路狭缝(20)连接到信号传递油路 (9)中,油路狭缝(20)形成有具有在阀盘(50)的切断位置具有搭接量X的止回阀功能的搭接部(32),油路(31- 1)具有安装在其中的2位三通阀(11)。 当没有外部信号(F)时,阀(11)将分流阀(5-1)的控制室(70)单独连接到信号传输油通道(9),而当外部信号(F) ,将控制室(70)与信号传递油路(9)连接到与分流阀(5-2)的出口通路(5b)连接的低压检测油路(35) 在液压执行机构(3-2)的一侧。 这确保了在复合操作期间驱动惯性体时,低负载压力侧的压力被检测为信号压力而不关闭高负载压力侧的负载压力检测油路,并且用于检测负载压力的部分是 简化,分流功能不受损害。

    PRESSURE OIL SUPPLYING APPARATUS
    46.
    发明申请
    PRESSURE OIL SUPPLYING APPARATUS 审中-公开
    压力油供应装置

    公开(公告)号:WO98046888A1

    公开(公告)日:1998-10-22

    申请号:PCT/JP1998/001662

    申请日:1998-04-10

    Abstract: When a boom cylinder (11) and an arm cylinder (18) are to be actuated simultaneously, the arm cylinder (18) is actuated after the boom cylinder (11) is actuated. A pressure reducing valve (30) is provided on a circuit which connects a hydraulic pilot valve (13) for an arm and a first pressure receiving section (16) of an arm operating valve (4) to each other. A throttle (40) and an accumulator (41) are provided on a circuit (23) connected to an output circuit of a hydraulic pilot valve (5) for a boom. The pressure reducing valve (30) is reduced in pressure by a pressure difference across the throttle (40). Thus a pressure oil flows to the accumulator (41) to produce a pressure difference across the throttle (40), so that the pressure reducing valve (30) is reduced in pressure until the pressure oil fills up the accumulator (41), and the arm operating valve (4) is switchingly actuated after a boom operating valve (3) has been switched.

    Abstract translation: 当动臂缸(11)和臂缸(18)同时致动时,臂缸(18)在动臂缸(11)被致动之后被致动。 在将臂的液压先导阀(13)和臂操作阀(4)的第一压力接收部(16)彼此连接的回路上设置有减压阀(30)。 在与用于悬臂的液压先导阀(5)的输出回路连接的回路(23)上设有节流阀(40)和蓄能器(41)。 减压阀(30)通过节流阀(40)的压力差而减小压力。 因此,压力油流入蓄能器(41)以产生横跨节流阀(40)的压力差,使得减压阀(30)的压力降低,直到压力油填满蓄能器(41),并且 手臂操作阀(4)在动臂操作阀(3)被切换之后被切换地致动。

    POSITIONING DRIVE, IN PARTICULAR FOR A MACHINE TOOL
    47.
    发明申请
    POSITIONING DRIVE, IN PARTICULAR FOR A MACHINE TOOL 审中-公开
    定位,特别是用于机床

    公开(公告)号:WO1996003586A1

    公开(公告)日:1996-02-08

    申请号:PCT/EP1995002467

    申请日:1995-06-24

    Abstract: The invention concerns a positioning drive which is used in particular for machine tools and which comprises a hydraulic motor (10). The hydraulic motor comprises: a control disc (17) which is rotatable with a motor shaft (18) and is provided with a radial cam (19); a control valve (12) which, with the hydraulic motor (10), forms a unit with a preferably multi-part housing (37, 46) and comprises a valve piston (15) which can be displaced between a plurality of settings; a control component (16) by means of which the valve piston (15) can be supported on the control disc (17); and an adjusting component (65) which is operatively disposed between the control component (16) and the valve piston (15) and is coaxial to the latter. The relative position between the valve piston (15) and control component (16) can be varied by the relative adjustment of the adjusting component (65) to the valve piston (15). The position of the adjusting component (65) relative to the valve piston (15) can be secured by a releasable securing component. In order to be able to adjust the position between the valve piston (15) and the control component (16) very simply, the outer of the two parts, valve piston (15) and adjusting component (65), is guided outwards through the housing and the securing component (72, 80) is accessible externally of the housing.

    Abstract translation: 本发明涉及一种具有一马达轴(18)可旋转地并与设有控制盘(17),控制阀的控制凸轮(19)的定位驱动器,其特别用于机床,和液压马达(10)(12) 与所述液压马达(10)有优选的多部件外壳中的结构单元(37,46)和在多个位置之间的可滑动阀活塞(15),控制元件(16),通过该阀活塞(15)的凸轮盘(17)上 可被支持,且可操作地连接所述控制元件(16)和所述阀活塞(15)和同轴的阀活塞(15)之间布置成穿过阀活塞(15)的阀活塞(15)之间的相对位置的相对位移调节元件(65)和 控制元件(16)是可改变的和它的位置到阀活塞(15)通过可释放的固定元件(72,80)可固定。 至阀活塞(15)之间的控制元件(16)在非常简单的方式将位置,以便能够调整和,阀活塞的两个部分的通过外壳向外部引导的外(15)和调节件(65),并且固定元件(72, 80)从壳体的外部访问。

    TRAVELLING HYDRAULIC DEVICE
    48.
    发明申请
    TRAVELLING HYDRAULIC DEVICE 审中-公开
    旅行液压装置

    公开(公告)号:WO1995023260A1

    公开(公告)日:1995-08-31

    申请号:PCT/JP1995000317

    申请日:1995-02-28

    Abstract: A travelling hydraulic device characterized in that a spool hole having a pump port, an actuator port and a return port is formed in a first valve block, that a spool for establishing and blocking communication between the respective ports is fittingly inserted into the spool hole so as to constitute a leftward switching valve, that a spool hole having a pump port, an actuator port and a return port is formed in a second valve block, that a spool for establishing and blocking communication between the respective ports is fittingly inserted into the spool hole so as to constitute a rightward switching valve, that a spool hole having a main port and a drain port is formed in a third valve block, that a spool for establishing and blocking communication between the respective ports is fittingly inserted into the spool hole so as to constitute a switching valve and that the first and second blocks are connected to the third valve block, respectively, so as to establish communication between the return ports and drain port, respectively.

    Abstract translation: 一种行驶液压装置,其特征在于,在第一阀块中形成有具有泵口,致动器端口和返回口的卷轴孔,用于建立和阻挡各个端口之间的连通的卷轴被适当地插入卷轴孔中, 为了构成向左的切换阀,在第二阀块中形成有具有泵口,致动器端口和返回端口的阀芯,用于建立和阻断各个端口之间的连通的阀芯适合地插入阀芯 孔构成向右的切换阀,在第三阀块中形成具有主端口和排出口的卷筒孔,用于建立和阻断各个端口之间的连通的卷轴被适当地插入卷轴孔中, 构成切换阀,并且第一和第二块分别连接到第三阀块,以便建立连通 返回端口和排水口。

    HYDRAULIC CIRCUIT FOR WORKING MACHINES
    49.
    发明申请
    HYDRAULIC CIRCUIT FOR WORKING MACHINES 审中-公开
    液压电路用于工作机械

    公开(公告)号:WO1990009528A1

    公开(公告)日:1990-08-23

    申请号:PCT/JP1990000193

    申请日:1990-02-19

    Abstract: This invention relates to a hydraulic circuit for working machines, provided with a hydraulic fluid source (1), at least one hydraulic actuator (3 or 13) adapted to be driven by the hydraulic fluid supplied from the hydraulic fluid source, flow rate control valves (4; 4A or 14; 14A) adapted to control a flow of the hydraulic fluid supplied to the actuator, and pressure control means (5; 5A or 15; 15A) for maintaining the pressure differences across the flow rate control valves on predetermined levels. The apparatus according to this invention has a first means (20; 23; 35, 36) for selectively producing one of a pressure equal to a load pressure and an intermediate pressure higher than the load pressure but lower than a supply pressure, on the basis of a load pressure on the actuator (3 or 13) and a supply pressure in the hydraulic fluid source (1), and outputting the resultant pressure as a control pressure; a second means (21; 27; 29; 34, 36) for operating the first means to specify a pressure to be selected as a control pressure, i.e. one of the pressure equal to the load pressure and the intermediate pressure; and a communication means (22) for introducing the control pressure to the pressure control means (5; 5A or 15; 15A). The pressure control means is adapted to maintain the above-mentioned pressure difference on the above-mentioned predetermined level when the control pressure is equal to the load pressure, and set the pressure difference to one lower than the predetermined level when the control pressure is the intermediate pressure.

    CONTROLLED PRESSURE UPSTAGING AND FLOW REDUCTION
    50.
    发明申请
    CONTROLLED PRESSURE UPSTAGING AND FLOW REDUCTION 审中-公开
    控制压力上升和流量减少

    公开(公告)号:WO1981000742A1

    公开(公告)日:1981-03-19

    申请号:PCT/US1979000735

    申请日:1979-09-17

    Abstract: An improvement in a hydraulic system (10) having a variable displacement pump (12) and being capable of delivering pressurized fluid from the pump (12) to selectively engage at least three work circuits (18) with a first (20) of the circuits (18) being normally operable up to a first pressure and a second (22) of the circuits (18) being normally operable up to a second and lower pressure. The improvement comprises circuitry (80, 92, 94, 98, 108, 120, 122, 124, 126) for selectively operating a third (24) of the circuits (18) atone of the first or second pressures or at an upstaged pressure which exceeds the first pressure and circuitry (128) for reducing the displacement of the pump (12) in response to the third circuit (24) being operated at the upstaged pressure. Such upstaged pressure is available in a controlled manner for working against particularly heavy loads. Thus, a third and higher operating level is added to a system which already operates at at least two pressure levels.

    Abstract translation: 具有可变排量泵(12)并且能够从泵(12)输送加压流体的液压系统(10)的改进,以选择性地与至少三个工作回路(18)接合,其中第一(20)个回路 (18)通常可操作到第一压力,并且电路(18)的第二(22)通常可操作到第二和较低压力。 该改进包括电路(80,92,94,98,108,120,122,124,126),用于选择性地操作第一或第二压力的第三(24)个电路(18)或在上升压力下 超过第一压力和电路(128),用于响应于在上升压力下操作的第三回路(24)减小泵(12)的位移。 这种升级压力可以以受控的方式提供,以对特别重的负载进行工作。 因此,第三和更高的操作级别被添加到已经在至少两个压力水平上操作的系统中。

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