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    Ventilanordnung
    2.
    发明公开
    Ventilanordnung 审中-公开
    阀组件

    公开(公告)号：EP2719903A3

    公开(公告)日：2017-12-20

    申请号：EP13004271.6

    申请日：2013-08-29

    申请人： ROBERT BOSCH GMBH

    发明人： Engert, Holger ,  Schmidt, Stefan ,  Foersterling, Heino

    IPC分类号： F15B13/043 ,  F16K31/42

    CPC分类号： F15B13/0431 ,  F15B2013/0409 ,  F15B2211/30575 ,  F15B2211/328 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/40592 ,  F15B2211/6355 ,  F15B2211/67 ,  F16K31/1225 ,  F16K31/42

    摘要： Offenbart ist, insbesondere erfindungsgemäß, eine Ventilanordnung mit einem Proportionalventil das über eine Vorsteuerschaltung vorgesteuert ist. Diese hat zum Verstellen eines Ventilschiebers des Proportionalventils in eine erste Richtung zumindest zwei Schaltventile mit unterschiedlichen Nenngrößen. Zum Verstellen des Ventilschiebers in entgegengesetzter Richtung sind ebenfalls zumindest zwei Schaltventile in unterschiedlichen Nenngrößen vorgesehen. Das jeweils größere Schaltventil dient zum schnellen Verstellen des Ventilschiebers und führt somit zu kurzen Stellzeiten, während die jeweils kleineren Schaltventile zur Feinpositionierung des Ventilschiebers eingesetzt werden.

    摘要翻译： 特别是根据本发明公开了一种具有比例阀的阀装置，该比例阀通过先导控制回路被预先控制。 这用于在第一方向上调节比例阀的阀芯至少两个具有不同公称尺寸的开关阀。 为了在相反的方向上调节阀芯，还提供至少两个不同尺寸的开关阀。 相应较大的开关阀用于快速调节阀芯，并由此导致较短的定位时间，而各个较小的开关阀用于阀芯的精确定位。

    CONTROL DEVICE FOR ZERO-LEAK DIRECTIONAL CONTROL VALVES
    4.
    发明公开
    CONTROL DEVICE FOR ZERO-LEAK DIRECTIONAL CONTROL VALVES 审中-公开
    用于零泄漏方向控制阀的控制装置

    公开(公告)号：EP3191716A2

    公开(公告)日：2017-07-19

    申请号：EP15756469.1

    申请日：2015-07-15

    申请人： Walvoil S.p.A.

    发明人： MUSIANI, Massimiliano ,  MESTURINI, Davide

    IPC分类号： F15B11/00

    CPC分类号： F15B11/16 ,  E02F3/325 ,  E02F9/2267 ,  E02F9/2271 ,  F15B11/003 ,  F15B13/01 ,  F15B2211/30515 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/6355

    摘要： Hydraulic system, distributor and bidirectional valve to activate the hydraulic actuators (3; 3a, 3b) of an operating machine; the hydraulic system (1) having: a first high-pressure oil delivery (4); an oil drain (8); a slide valve with a spool, which is axially sliding and is suited to control a hydraulic actuator (3); a second low-pressure oil delivery (6); an activation valve (15); and a bidirectional valve (21) with a first passage opening (22) that can be hydraulically connected, by the slide valve (9) to the first delivery (4) and a second passage opening (23) hydraulically connected to the actuator (3); wherein, the bidirectional valve has an inlet opening (24) that can be connected, by the activation valve (15) to the second delivery (6) and an outlet opening (25) that can be connected, by the spool (12) to the drain (8).

    摘要翻译： 液压系统，分配器和双向阀，用于启动操作机器的液压执行器（3; 3a，3b）; 所述液压系统（1）具有：第一高压油递送件（4）; 一个排油口（8）; 带有一个轴向滑动并适于控制液压致动器（3）的滑阀的滑阀; 第二低压输油器（6）; 一个启动阀（15）; 和具有第一通道开口（22）的双向阀（21），所述第一通道开口能够通过所述滑阀（9）液压连接到所述第一输送装置（4）和液压连接到所述致动器的第二通道开口（23） （3）; 其中所述双向阀具有能够通过所述致动阀（15）连接到所述第二输送装置（6）的入口开口（24）和能够借助于所述阀芯连接的出口开口（25） （12）连接到排水管（8）。

    CONSTRUCTION EQUIPMENT
    8.
    发明公开
    CONSTRUCTION EQUIPMENT 有权
    BAUMASCHINE

    公开(公告)号：EP2955279A4

    公开(公告)日：2016-09-07

    申请号：EP13874576

    申请日：2013-12-13

    申请人： HYUN DAI HEAVY IND CO LTD

    发明人： CHOI KYE HYUN ,  YIM JONG HYUNG ,  LEE SANG HOON ,  LEE HO YOUN

    IPC分类号： E02F3/43 ,  E02F3/32 ,  E02F9/22

    CPC分类号： E02F9/2203 ,  E02F3/32 ,  E02F3/435 ,  E02F9/2285 ,  E02F9/2292 ,  F15B2211/355 ,  F15B2211/41581 ,  F15B2211/426 ,  F15B2211/6316 ,  F15B2211/6355 ,  F15B2211/6658

    摘要： Construction equipment, according to the present invention, comprises: a boom operating unit including a boom, a boom cylinder, and a boom head and rod return solenoids for controlling the extension of the boom by controlling the ascending and descending of the boom cylinder; an arm operating unit comprising an arm and an arm cylinder so as to move the arm by controlling the extension of the arm cylinder; and a control unit for generating a flow path connection signal in at least a part of the boom head and rod return solenoids upon operation of an arm lever in a boom float mode so as to control the boom cylinder. An operation of simultaneously driving the boom and the arm of the construction equipment can be performed even by only an arm lever operation of an operator, and thus does not require skilled work and can lessen fatigue from repetitive work.

    摘要翻译： 根据本发明的施工设备包括：起重臂操作单元，其包括吊臂，动臂缸，以及用于通过控制悬臂液压缸的上升和下降来控制悬臂的延伸的悬臂头和杆返回螺线管; 臂操作单元，其包括臂和臂气缸，以通过控制臂气缸的延伸来移动臂; 以及控制单元，用于在臂悬臂模式下操作臂杆时，在动臂头和杆返回螺线管的至少一部分中产生流路连接信号，以控制动臂缸。 即使通过操作者的手臂操作也可以进行同时驱动施工设备的动臂和臂的操作，因此不需要熟练的工作，并且可以减轻重复工作的疲劳。

    FLOW CONTROL VALVE FOR CONSTRUCTION MACHINERY
    9.
    发明公开
    FLOW CONTROL VALVE FOR CONSTRUCTION MACHINERY 审中-公开

    公开(公告)号：EP2876306A4

    公开(公告)日：2016-05-25

    申请号：EP12881324

    申请日：2012-07-19

    申请人： VOLVO CONSTR EQUIP AB

    发明人： KIM JIN-WOOK

    IPC分类号： F15B13/043 ,  E02F9/22 ,  F15B13/02 ,  F16K11/07

    CPC分类号： F15B11/024 ,  E02F9/2267 ,  F15B11/0406 ,  F15B11/0426 ,  F15B13/021 ,  F15B13/0403 ,  F15B2211/205 ,  F15B2211/20576 ,  F15B2211/30565 ,  F15B2211/3133 ,  F15B2211/31582 ,  F15B2211/355 ,  F16K11/07 ,  Y10T137/87193

    摘要： Disclosed is a flow control valve for construction machinery, the flow control valve being adapted to reduce pressure loss due to flow on return to a hydraulic tank during the boom-down operation of a large-scale excavator. The flow control valve for construction machinery according to the present invention comprises: first and second boom spools which are respectively coupled to first and second boom valve blocks, and which regulate working fluid that is respectively supplied from first and second hydraulic pumps to a boom cylinder during direction reversal; a boom-up flow-adjusting means which, in direction reversal of the first and second boom spools for boom-up drive, supplies working fluid from the first and second hydraulic pumps into a large chamber of the boom cylinder via the first and second boom spools respectively, and causes part of the flow of working fluid from the second hydraulic pump to pass via the second boom spool so as to be combined with working fluid being supplied from the first hydraulic pump to the large chamber of the boom cylinder due to direction reversal of the first boom spool; and a boom-down flow-adjusting means which, in direction reversal of the first and second boom spools for boom-down drive, causes part of the flow of working fluid coming back from the large chamber of the boom cylinder to return to the hydraulic tank via the first and second boom spools respectively, and causes part of the flow of working fluid coming back from the large chamber of the boom cylinder to combine as respective regenerative flows for working fluid on the small chamber side of the boom cylinder.

    HYDRAULIC CONTROL VALVE FOR CONSTRUCTION MACHINERY
    10.
    发明公开
    HYDRAULIC CONTROL VALVE FOR CONSTRUCTION MACHINERY 审中-公开
    建筑机械的液压控制阀

    公开(公告)号：EP2886878A4

    公开(公告)日：2016-04-06

    申请号：EP12891371

    申请日：2012-08-16

    申请人： VOLVO CONSTR EQUIP AB

    发明人： KU BON-SEUK

    IPC分类号： F15B13/042 ,  E02F9/22 ,  F15B13/02 ,  F15B20/00

    CPC分类号： F15B13/0426 ,  E02F9/2267 ,  E02F9/2285 ,  F15B13/025 ,  F15B13/0422 ,  F15B20/005 ,  F15B2013/0428 ,  F15B2211/30525 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/6355 ,  Y10T137/7762

    摘要： The present invention relates to a hydraulic control valve for construction machinery that is used to maintain secondary pilot pressure which is formed proportionally to the switching of a switching device so as to be equal to or below a setting pressure of a pilot pump. The hydraulic control valve of the present invention includes: a port of the pilot pump into which the pilot pressure flows; a tank port to which the pilot pressure is drained; a valve body at which a secondary pilot pressure port that selectively communicates with the port of the pilot pump and the tank port is formed; the switching device that is pivotally mounted on the valve body; a pilot control valve that is linked through pressurization of the switching device and has a spool which forms the secondary pilot pressure proportional to the amount of switching of the switching device by communicating the port of the pilot pump and the secondary pilot pressure port with each other during the switching; a valve spring that elastically supports the spool so as to communicate the secondary pilot pressure port and the tank port with each other; and a check poppet that is disposed in an openable and closable manner at a pilot passage whose inlet side communicates with the secondary pilot pressure port and whose outlet side communicates with the port of the pilot pump.