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    HYDRAULIC DRIVE DEVICE FOR CONSTRUCTION MACHINE
    21.
    发明公开
    HYDRAULIC DRIVE DEVICE FOR CONSTRUCTION MACHINE 审中-公开
    HYDRAULISCHE ANTRIEBSVORRICHTUNGFÜREINE BAUMASCHINE

    公开(公告)号：EP3076027A1

    公开(公告)日：2016-10-05

    申请号：EP14866109.3

    申请日：2014-11-26

    申请人： Hitachi Construction Machinery Co., Ltd.

    发明人： TSURUGA Yasutaka ,  TAKAHASHI Kiwamu ,  OKAZAKI Yasuharu ,  NOBEZAWA Hiroyuki ,  YAMADA Kenji

    IPC分类号： F15B11/02 ,  E02F9/22 ,  F15B11/00

    CPC分类号： E02F9/2235 ,  E02F3/325 ,  E02F9/2228 ,  E02F9/2232 ,  E02F9/2267 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/17 ,  F15B13/025 ,  F15B13/026 ,  F15B13/0803 ,  F15B20/007 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/25 ,  F15B2211/6652 ,  F15B2211/6655

    摘要： It is an object of the present invention to accurately detect the absorption torque of the other of two hydraulic pumps by a purely hydraulic structure and feed the absorption torque to one of the two hydraulic pumps, thereby to accurately perform a total torque control, effectively utilize a rated output torque of a prime mover, and enhance mountability. To achieve the object, there are provided: a torque feedback circuit 31 to which the delivery pressure of a first hydraulic pump 1a and a load sensing drive pressure are introduced, which modifies the delivery pressure of a second hydraulic pump 1b to provide a characteristic simulating the absorption torque of the second hydraulic pump 1b, and which outputs the modified pressure; and torque feedback pistons 32a, 32b to which the output pressure of the torque feedback circuit 31 is introduced, and which control the capacity of the first hydraulic pump 1a to decrease the capacity of the first hydraulic pump 1a and decrease a maximum torque T1max as the output pressure becomes higher. The torque feedback circuit 31 includes pressure dividing restrictor parts 34a, 34b, pressure dividing valves 35a, 35b, and relief valves 37a, 37b.

    摘要翻译： 本发明的目的是通过纯水力结构精确地检测两个液压泵中的另一个的吸收扭矩，并将吸收扭矩馈送到两个液压泵中的一个，从而精确地执行总转矩控制，有效地利用 原动机的额定输出转矩，并增强了安装性。 为了实现该目的，提供了一种扭矩反馈电路31，第一液压泵1a的输送压力和负载感测驱动压力被引入到该扭矩反馈电路31，该第二液压泵1b的输送压力改变第二液压泵1b的输送压力，以提供模拟的特性 第二液压泵1b的吸收转矩，并输出修正压力; 以及引入扭矩反馈回路31的输出压力的扭矩反馈活塞32a，32b，并且控制第一液压泵1a的容量，以降低第一液压泵1a的容量，并将最大转矩T1max减小为 输出压力变高。 扭矩反馈回路31包括分压限制部34a，34b，分压阀35a，35b，溢流阀37a，37b。

    FLOW CONTROL DEVICE AND FLOW CONTROL METHOD FOR CONSTRUCTION MACHINE
    22.
    发明公开
    FLOW CONTROL DEVICE AND FLOW CONTROL METHOD FOR CONSTRUCTION MACHINE 有权
    FLUSSSTEUERUNGSVORRICHTUNG FLUSSSTEUERUNGSVERFAHRENFÜREINE BAUMASCHINE

    公开(公告)号：EP2947211A1

    公开(公告)日：2015-11-25

    申请号：EP13871736.8

    申请日：2013-01-18

    申请人： Volvo Construction Equipment AB

    发明人： JOUNG, Hea-Gyoon ,  KIM, Sung-Gon

    IPC分类号： E02F9/22 ,  F02D29/04

    CPC分类号： F15B11/024 ,  E02F9/2217 ,  E02F9/2225 ,  E02F9/2228 ,  E02F9/2282 ,  E02F9/2296 ,  F15B13/026 ,  F15B13/027 ,  F15B2211/20546 ,  F15B2211/3133 ,  F15B2211/505

    摘要： Disclosed are a flow control device and a flow control method for a construction machine for preventing the loss of fluid exhausted from a hydraulic pump when a boom and an arm of an excavator are operated in combination. The flow control device for a construction machine according to the present invention includes: an engine; a variable capacity hydraulic pump connected to the engine; a first hydraulic cylinder and a second hydraulic cylinder connected to the hydraulic pump; a first control valve disposed in a center bypass channel of the hydraulic pump, the first control valve, in neutral, returning the fluid exhausted from the hydraulic pump to a hydraulic tank and, when switched, controlling the driving, stopping, and direction change of the first hydraulic cylinder; a second control valve disposed downstream of the center bypass channel of the hydraulic pump, the second control valve, in neutral, returning the fluid exhausted from the hydraulic pump to the hydraulic tank and, when switched, controlling the driving, stopping, and direction change of the second hydraulic cylinder; a regeneration fluid channel for supplementing and reusing fluid returned to the hydraulic tank during a compression stroke of the first hydraulic cylinder, and a regeneration valve disposed in the regeneration fluid channel; and a pressure-compensated flow control valve which is disposed in a meter-in fluid channel of a spool of the first control valve and limits the quantity of working fluid supplied from the hydraulic pump to the first hydraulic cylinder when the first hydraulic cylinder and the second hydraulic cylinder are operated in combination.

    摘要翻译： 公开了一种施工机械的流量控制装置和流量控制方法，用于防止当挖掘机的悬臂和臂组合操作时从液压泵排出的流体的损失。 根据本发明的施工机械的流量控制装置包括：发动机; 连接到发动机的可变容量液压泵; 连接到液压泵的第一液压缸和第二液压缸; 第一控制阀，设置在液压泵的中心旁通通道中，第一控制阀处于空档状态，将从液压泵排出的液体返回到液压箱，并且当切换时，控制驱动，停止和方向变化 第一液压缸; 设置在液压泵的中心旁通通道下游的第二控制阀，第二控制阀处于空档状态，将从液压泵排出的流体返回到液压缸，并且当切换时控制驱动，停止和方向变化 的第二液压缸; 再生流体通道，用于在第一液压缸的压缩冲程期间补充和重新使用返回到液压缸的流体;以及再生阀，设置在再生流体通道中; 以及压力补偿流量控制阀，其设置在所述第一控制阀的阀芯的流入通道中，并且当所述第一液压缸和所述第一液压缸和所述第二液压缸 第二液压缸组合操作。

    PRESSURE COMPENSATION VALVE
    23.
    发明公开
    PRESSURE COMPENSATION VALVE 审中-公开
    压力补偿系统

    公开(公告)号：EP2944829A1

    公开(公告)日：2015-11-18

    申请号：EP13898030.5

    申请日：2013-12-25

    申请人： Jiangsu Hengli Hydraulic Co., Ltd.

    发明人： WANG, Liping ,  YUAN, Caifu ,  LU, Qiang ,  CHEN, Zhan ,  LIU, Hongguang

    IPC分类号： F15B13/02

    CPC分类号： E02F9/2225 ,  E02F9/2267 ,  F15B13/01 ,  F15B13/026 ,  F15B13/0405 ,  F15B2211/6052 ,  F16K1/307 ,  F16K1/526 ,  F16K15/18 ,  F16K31/1221 ,  Y10T137/7762 ,  Y10T137/7764 ,  Y10T137/7842

    摘要： A pressure compensation valve comprises a valve body, a valve sleeve fixedly mounted on the valve body, and a spool disposed in a valve hole of the valve body and capable of moving. The valve sleeve and the spool are sequentially provided with a piston and a return spring. The piston is placed on an inner hole of the valve sleeve. The return spring is internally provided within a pressure chamber formed between the piston and the valve sleeve, and acts on a transverse end surface of the piston. A check valve only allowing a single-direction flow to an LS flow channel is disposed in an oil feeding chamber of the valve body. The spool establishes or blocks a connection between the oil feeding chamber and an oil discharging chamber. The pressure compensation valve changes a pressure compensation feature, that is, changes an effective pressure acting surface (A1); for example, if the effective pressure acting surface (A1) is increased, force pushing the piston is increased with respect to blocking, and the pressure in the oil feeding chamber is increased, thereby making a pressurized liquid difficult to flow; on the contrary, if the effective pressure acting surface (A1) is decreased, the pressurized liquid becomes easy to flow. The structure is simple, requires low cost, and increases the utilization rate of a product.

    FLOW CONTROL VALVE FOR CONSTRUCTION MACHINE
    25.
    发明公开
    FLOW CONTROL VALVE FOR CONSTRUCTION MACHINE 审中-公开
    DURCHFLUSSREGELVENTILFÜREINE BAUMASCHINE

    公开(公告)号：EP2644905A1

    公开(公告)日：2013-10-02

    申请号：EP10860029.7

    申请日：2010-11-25

    申请人： Volvo Construction Equipment AB

    发明人： KU, Bon-Seuk ,  JOUNG, Hea-Gyoon ,  JEON, Man-Seuk

    IPC分类号： F15B13/02 ,  E02F9/22 ,  F16K11/07

    CPC分类号： F15B13/026 ,  E02F9/2267 ,  F15B13/0418 ,  F15B13/06 ,  F16K11/0716 ,  Y10T137/8671

    摘要： A flow control valve for a construction machine is provided, which can constantly control a flow rate of hydraulic fluid supplied to a hydraulic actuator through a flow control spool in a spool. The flow control valve for a construction machine, having a valve body in which a supply passage communicating with a pump passage and actuator ports connected to a hydraulic actuator are formed, and a spool installed in the valve body to be shifted, includes a flow control spool shifted in the spool to variably control a cross-sectional area of a passage connected to the one actuator port if a flow rate of the hydraulic fluid that flows through the supply passage is higher than a set flow rate, a first passage formed on the spool to communicate with the supply passage, a second passage formed on the spool to communication with the one actuator port and having a cross-sectional area that is varied depending on the shifting of the flow control spool, a third passage formed on the flow control spool to communicate with the first and second flow control passages, a first signal pressure passage formed on the flow control spool to make a first flow control passage and a pressure chamber communicate with each other, and a second signal pressure passage formed on the flow control spool to make the third passage and a back pressure chamber communicate with each other.

    摘要翻译： 提供了一种用于建筑机械的流量控制阀，其可以通过阀芯中的流量控制阀轴来恒定地控制供给到液压致动器的液压流体的流量。 一种用于建筑机械的流量控制阀，其具有阀体，其中形成有与泵通道连通的供给通道和连接到液压致动器的致动器端口的阀体，以及安装在要移动的阀体中的阀芯，包括流量控制 如果流过供应通道的液压流体的流量高于设定的流量，则在阀芯中移动的阀芯可变地控制连接到一个致动器端口的通道的横截面面积，形成在第一通道上的第一通道 阀芯与供给通道连通，第二通道形成在阀芯上以与一个致动器端口连通并且具有根据流量控制阀芯的变速而变化的横截面积;形成在流量控制器上的第三通道 阀芯与第一和第二流量控制通道连通，第一信号压力通道形成在流量控制阀芯上以形成第一流量控制通道和压力腔室 并且形成在流量控制阀芯上以使第三通道和背压室彼此连通的第二信号压力通道。

    DIRECTIONAL CONTROL VALVE
    30.
    发明公开
    DIRECTIONAL CONTROL VALVE 审中-公开
    方向控制阀

    公开(公告)号：EP3201475A2

    公开(公告)日：2017-08-09

    申请号：EP15779117.9

    申请日：2015-09-29

    申请人： Parker Hannifin Corporation

    发明人： COOLIDGE, Gregory

    IPC分类号： F15B11/16

    CPC分类号： F15B11/161 ,  E02F3/32 ,  E02F9/2225 ,  E02F9/2267 ,  F15B13/026 ,  F15B13/027 ,  F15B2211/3105 ,  F15B2211/3122 ,  F16K11/07 ,  F16K31/426

    摘要： Exemplary control valves that may be configured as a load sense, closed-center, and/or open-center valve. The control valve may include optional individual valve force sensing to potentially allow an operator to smoothly operate devices operating on low-load work ports even when a variable displacement pump is inducing pressure to operate a device connected to a high-load work port of a separate valve or worksection in the same stack. This optional force sensing may be employed on any or all worksections associated with any valve stack, and may further be included on one or both workports for any given worksection. Each worksection may include parallel and variable paths of fluid supplied by the pump. Also, flow priority to one or more worksections or external valves in a corresponding hydraulic system is optional and can be customized using the variable flow path and a corresponding fixed restriction.

    摘要翻译： 示例性的控制阀可以构造为负载传感器，封闭式中心和/或开中心阀。 控制阀可以包括可选的单独的阀力感测，以潜在地允许操作者平稳地操作在低负载工作端口上操作的装置，即使当可变排量泵正在感应压力以操作连接到单独的高负载工作端口的装置时 阀门或工作区域在同一个堆栈中。 这种可选的力感测可以用在与任何阀组相关联的任何或所有工作部位上，并且可以进一步包括在一个或两个工作部位上用于任何给定的工作部位。 每个工作部分可以包括由泵供应的平行和可变的流体路径。 而且，对于相应液压系统中的一个或多个工作部分或外部阀的流量优先是可选的，并且可以使用可变流动路径和相应的固定限制来定制。