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    HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE
    1.
    发明公开
    HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE 有权
    HYDRAULIKSCHALTUNGFÜREINE BAUMASCHINE

    公开(公告)号：EP3026181A4

    公开(公告)日：2017-03-01

    申请号：EP13890170

    申请日：2013-07-24

    Applicant: VOLVO CONSTR EQUIP AB

    Inventor： JOUNG HEA-GYOON ,  KIM SUNG-GON

    IPC: E02F9/22 ,  F15B13/02

    CPC classification number: F15B11/16 ,  E02F9/2225 ,  E02F9/2228 ,  E02F9/2267 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2296 ,  F15B2211/35 ,  F15B2211/355 ,  F15B2211/36 ,  F15B2211/40515 ,  F15B2211/41554 ,  F15B2211/45 ,  F15B2211/575 ,  F15B2211/6316 ,  F15B2211/6654 ,  F15B2211/67

    Abstract: A hydraulic circuit for a construction machine is disclosed, which can prevent a loss of pressure during a combined work. The hydraulic circuit includes a variable displacement hydraulic pump, at least two hydraulic actuators driven by hydraulic fluid that is supplied from the hydraulic pump, control valves installed in a center bypass path of the hydraulic pump and shifted to control a start, a stop, and a direction change of the hydraulic actuators, parallel flow paths having inlets branched and connected to predetermined positions on an uppermost stream side of the center bypass path and outlets connected to inlet ports of the control valves, bleed-off paths formed on the control valves other than the lowermost downstream side control valve among the control valves to selectively communicate with the center bypass path, the bleed-off paths communicating with the center bypass path when the plurality of control valves are shifted for a combined work, and a switching valve installed on a lowermost downstream side of the center bypass path to intercept the center bypass path when pilot signal pressure is applied.

    Abstract translation: 公开了一种用于建筑机械的液压回路，其可以防止在组合作业期间的压力损失。 液压回路包括可变排量液压泵，由液压泵供给的至少两个由液压流体驱动的液压致动器，安装在液压泵的中心旁通路径中的控制阀，并转移以控制起动，停止和 液压致动器的方向变化，具有分流并连接到中心旁路路径的最上游侧的预定位置的入口的平行流路和连接到控制阀的入口的出口，形成在控制阀上的排出路径其他 所述控制阀中的最下游侧控制阀与所述中心旁通路径选择性地连通，所述排出路径在所述多个控制阀被移动以进行组合作业时与所述中心旁路通路连通，并且切换阀安装在 中心旁路路径的最下游侧，用于当导频信号压力时截取中心旁路路径 应用。

    HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE
    3.
    发明公开
    HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE 有权
    建筑机械液压回路

    公开(公告)号：EP3026181A1

    公开(公告)日：2016-06-01

    申请号：EP13890170.7

    申请日：2013-07-24

    Applicant: Volvo Construction Equipment AB

    Inventor： JOUNG, Hea-Gyoon ,  KIM, Sung-Gon

    IPC: E02F9/20 ,  F15B13/02

    CPC classification number: F15B11/16 ,  E02F9/2225 ,  E02F9/2228 ,  E02F9/2267 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2296 ,  F15B2211/35 ,  F15B2211/355 ,  F15B2211/36 ,  F15B2211/40515 ,  F15B2211/41554 ,  F15B2211/45 ,  F15B2211/575 ,  F15B2211/6316 ,  F15B2211/6654 ,  F15B2211/67

    Abstract: A hydraulic circuit for a construction machine is disclosed, which can prevent a loss of pressure during a combined work. The hydraulic circuit includes a variable displacement hydraulic pump, at least two hydraulic actuators driven by hydraulic fluid that is supplied from the hydraulic pump, control valves installed in a center bypass path of the hydraulic pump and shifted to control a start, a stop, and a direction change of the hydraulic actuators, parallel flow paths having inlets branched and connected to predetermined positions on an uppermost stream side of the center bypass path and outlets connected to inlet ports of the control valves, bleed-off paths formed on the control valves other than the lowermost downstream side control valve among the control valves to selectively communicate with the center bypass path, the bleed-off paths communicating with the center bypass path when the plurality of control valves are shifted for a combined work, and a switching valve installed on a lowermost downstream side of the center bypass path to intercept the center bypass path when pilot signal pressure is applied.

    Abstract translation: 公开了一种用于建筑机械的液压回路，其能够防止组合工作期间的压力损失。 该液压回路包括可变排量液压泵，由从液压泵供应的液压流体驱动的至少两个液压致动器，安装在液压泵的中心旁路路径中并且被移位以控制起动，停止的控制阀，以及 液压致动器的方向改变，具有分支并连接到中心旁路路径的最上游侧上的预定位置的入口的平行流动路径，以及连接到控制阀的入口的出口，形成在其他控制阀上的排出路径 当控制阀中的最下游侧控制阀选择性地与中央旁路路径连通时，当多个控制阀移位以进行组合工作时，与中心旁路路径连通的旁路路径和安装在中央旁路路径上的切换阀 当导频信号压力为时，中心旁路路径的最下游侧截取中心旁路路径 应用。

    SHOCK-ABSORBING VALVE
    4.
    发明公开
    SHOCK-ABSORBING VALVE 审中-公开
    STOSSDÄFFENDESVENTIL

    公开(公告)号：EP2977659A1

    公开(公告)日：2016-01-27

    申请号：EP14768244.7

    申请日：2014-03-07

    Applicant: Kawasaki Jukogyo Kabushiki Kaisha

    Inventor： MATSUO, Masahiro ,  KAWAKAMI, Ryo

    IPC: F16K47/04 ,  F15B11/00 ,  F15B11/08 ,  F16K3/26 ,  F16K11/10

    CPC classification number: F15B13/0422 ,  F15B13/0402 ,  F15B13/0407 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/8606 ,  F16K11/10 ,  F16K47/023 ,  F16K47/04 ,  Y10T137/87193

    Abstract: A cushion valve (1) includes a housing (2) having a pair of primary chambers (25A and 25B) and a pair of secondary chambers (26A and 26B). A first spool (3) and a pair of second spools (4A and 4B) are arranged in the housing (2). Biasing members (6) are respectively arranged between the first spool (3) and the second spool (4A) and between the first spool (3) and the second spool (4B). A first internal passage (35) communicating with a tank port (23) is formed at the first spool (3). Each of the second spools includes a land portion (43) configured to open or close an opening (27A or 27B) formed between the primary chamber and the corresponding secondary chamber. A second internal passage (45) including a restrictor (46) is formed at each of the second spools. When one of the second spools moves toward the first spool (3), the first internal passage (35) communicates with the secondary chamber located at the other second spool side.

    Abstract translation: 缓冲阀（1）包括具有一对初级室（25A和25B）和一对二级室（26A和26B）的壳体（2）。 第一卷轴（3）和一对第二卷轴（4A和4B）布置在壳体（2）中。 偏置构件（6）分别布置在第一卷轴（3）和第二卷轴（4A）之间以及第一卷轴（3）和第二卷轴（4B）之间。 在第一卷轴（3）上形成有与罐口（23）连通的第一内部通道（35）。 每个第二线轴包括被构造成打开或关闭形成在主腔室和相应辅助腔室之间的开口（27A或27B）的陆部（43）。 在每个第二卷轴上形成包括节流器（46）的第二内部通道（45）。 当第二卷轴中的一个向第一卷轴（3）移动时，第一内部通道（35）与位于另一个第二卷轴侧的副室连通。

    HYDRAULIC PRESSURE CONTROL DEVICE
    5.
    发明公开
    HYDRAULIC PRESSURE CONTROL DEVICE 审中-公开
    HYDRAULIKDRUCKSTEUERUNGSVORRICHTUNG

    公开(公告)号：EP2916011A1

    公开(公告)日：2015-09-09

    申请号：EP13850117.6

    申请日：2013-10-30

    Applicant: Kawasaki Jukogyo Kabushiki Kaisha

    Inventor： KONDO, Akihiro ,  ITO, Makoto ,  FUJIYAMA, Kazuto ,  SAKASHITA, Koji

    IPC: F15B11/08 ,  E02F9/22 ,  F15B21/04

    CPC classification number: E02F9/2228 ,  E02F9/2203 ,  E02F9/2235 ,  E02F9/226 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/08 ,  F15B11/166 ,  F15B13/026 ,  F15B13/0426 ,  F15B21/045 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/6343 ,  F15B2211/6346 ,  F15B2211/6355 ,  F15B2211/665 ,  F15B2211/67

    Abstract: A liquid-pressure control device 1 includes a switching valve 26, a manipulation valve 36, a first back pressure output mechanism 42, and a second shuttle valve 41. When a manipulation lever 37 is manipulated, the manipulation valve 36 outputs a first output pressure P01 corresponding to a manipulation amount of the manipulation lever 37. When a predetermined operation state is satisfied, the first back pressure output mechanism 42 outputs a first back pressure pb1. The first output pressure P01 its input as a first pilot pressure P1 to the switching valve 26, and the first back pressure pb1 is input as a second pilot pressure P2 to the switching valve 26. The switching valve 26 supplies a liquid pressure to a boom cylinder 7 at a flow rate corresponding to a differential pressure between the first and second pilot pressures P1 and P2.

    Abstract translation: 液压控制装置1包括切换阀26，操作阀36，第一背压输出机构42和第二梭阀41.当操纵操作杆37时，操作阀36输出第一输出压力 P01对应于操作杆37的操作量。当满足预定操作状态时，第一背压输出机构42输出第一背压pb1。 第一输出压力P01作为第一先导压力P1输入到切换阀26，第一后压力pb1作为第二先导压力P2输入到切换阀26.切换阀26将液体压力供应到起重臂 气缸7以与第一和第二先导压力P1和P2之间的压差相对应的流量。

    Power beyond valve assembly for an agricultural implement
    6.
    发明公开
    Power beyond valve assembly for an agricultural implement 有权
    Power-Beyond-Ventilanordnungfürein landwirtschaftlichesAnbaugerät

    公开(公告)号：EP2886877A1

    公开(公告)日：2015-06-24

    申请号：EP14197255.4

    申请日：2014-12-10

    Applicant: CNH Industrial Italia S.p.A.

    Inventor： Brinkley, Jerry L. ,  Stoever, Guy T. ,  Restaino, III, Gerard

    IPC: F15B11/028

    CPC classification number: E02F9/2285 ,  F15B11/028 ,  F15B13/025 ,  F15B2211/50554 ,  F15B2211/5158 ,  F15B2211/526 ,  F15B2211/528 ,  F15B2211/6355 ,  F15B2211/665 ,  F15B2211/6653 ,  F15B2211/67 ,  F15B2211/7058 ,  F16H61/12 ,  F16H61/4017 ,  F16H61/4078 ,  F16H61/47 ,  Y10T137/87193 ,  Y10T137/87209

    Abstract: A power beyond valve assembly for an agricultural implement includes a pressure compensation spool that receives hydraulic fluid from a hydraulic supply and selectively provides the hydraulic fluid to a hydraulic system of the agricultural implement. The position of the pressure compensation spool is adjustable between an open position that facilitates flow of the hydraulic fluid to the hydraulic system and a closed position that blocks flow of the hydraulic fluid to the hydraulic system. Additionally, two fluid connections provide the hydraulic fluid to either end of the pressure compensation spool to urge the pressure compensation spool to an open or a closed position. Further, a pressure relief valve is fluidly coupled to one of the fluid connections, and the pressure relief value is adjustable to vary hydraulic pressure within the hydraulic system.

    Abstract translation: 超过用于农具的阀组件的功率包括压力补偿阀芯，其从液压供应器接收液压流体并且选择性地将液压流体提供给农具的液压系统。 压力补偿阀芯的位置在有助于液压流体流向液压系统的打开位置和阻止液压流体流向液压系统的关闭位置之间是可调节的。 另外，两个流体连接将液压流体提供给压力补偿阀芯的任一端以将压力补偿阀芯推动到打开或关闭位置。 此外，泄压阀流体地联接到流体连接中的一个，并且压力释放值可调节以改变液压系统内的液压。

    LIQUID PRESSURE MOTOR
    7.
    发明公开
    LIQUID PRESSURE MOTOR 有权
    FLÜSSIGKEITSDRUCKMOTOR

    公开(公告)号：EP2397702A1

    公开(公告)日：2011-12-21

    申请号：EP09840020.3

    申请日：2009-06-24

    Applicant: Nabtesco Corporation

    Inventor： SATAKE, Teruhiko ,  KARINO, Takuhiro

    IPC: F15B11/00

    CPC classification number: F15B11/08 ,  F15B2211/50518 ,  F15B2211/5154 ,  F15B2211/528 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/7058 ,  F15B2211/755 ,  F15B2211/853 ,  F15B2211/8616 ,  F16H61/4043 ,  F16H61/4157 ,  F16H2063/3033

    Abstract: A hydraulic motor 100 includes a switching valve 3 which is connected to a pilot passage 54 by which a pressure fluid is introduced into a back pressure chamber 21 of a relief valve 2 and takes a first changeover position 3a where the back pressure chamber 21 is connected to a tank 102 or a second changeover position 3b where the pilot passage 54 is connected to the back pressure chamber 21. By this switching valve 3, the pressure fluid supplied to a hydraulic motor mechanism 1 is introduced into the back pressure chamber 21 via the pilot passage 54 when the hydraulic motor mechanism 1 is in operation, whereas the back pressure chamber 21 is connected to the tank 102 as the pressure in the pilot passage 54 becomes not higher than a predetermined pressure when the hydraulic motor mechanism 1 is being braked.

    Abstract translation: 液压马达100包括切换阀3，该切换阀3连接到先导通道54，通过该导阀通道54将压力流体引入安全阀2的背压室21中并且采取第一转换位置3a，其中背压室21连接 引导通路54连接到背压室21的罐102或第二切换位置3b。通过该切换阀3，供给到液压马达机构1的压力流体经由 当液压马达机构1正在运行时，导向通道54，而当液压马达机构1正在制动时，背压室21与导向通道54中的压力变得不高于预定压力而连接到箱体102。

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