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28 条记录 (耗时 0.011 秒)

    HYDRAULIC CONTROL VALVE, DUAL-CYLINDER EXTENSION SYSTEM AND AERIAL WORK ENGINEERING MACHINE
    1.
    发明公开
    HYDRAULIC CONTROL VALVE, DUAL-CYLINDER EXTENSION SYSTEM AND AERIAL WORK ENGINEERING MACHINE 审中-公开
    水力发电机组，ZWEI-ZYLINDER-AUSZIEHSYSTEM UND HUBARBEITSMANIPULATIONSMASCHINE

    公开(公告)号：EP2759714A4

    公开(公告)日：2015-09-02

    申请号：EP12834004

    申请日：2012-02-16

    申请人： XUZHOU HEAVY MACHINERY CO LTD

    发明人： SHI XIANXIN ,  XU XIAODONG ,  KONG DEMEI ,  LU LIANGWEI

    IPC分类号： F15B11/22 ,  B66F11/04 ,  B66F17/00

    CPC分类号： F15B11/22 ,  B66F11/04 ,  B66F17/006 ,  F15B21/001 ,  F15B2211/31588 ,  F15B2211/327 ,  F15B2211/4053 ,  F15B2211/7057 ,  F15B2211/7114 ,  Y10T137/87265 ,  Y10T137/87507

    摘要： A hydraulic control valve, a dual-cylinder extension system and an aerial work engineering machine. The control valve comprises a flow distributing and collecting valve, and control valve body is provided with a first oil opening, a second oil opening and a third oil opening. A first oil opening, a second oil opening and a third oil opening of said flow distributing and collecting valve are respectively communicated with the first oil opening, the second oil opening and the third oil opening of the valve body. The control valve has two working states, wherein, in the first working state, the oil path between the second oil opening and the third oil opening of the valve body is blocked; and in the second working state, the oil path between the second oil opening and the third oil opening of the valve body is opened. The hydraulic control valve is able to make the two cylinders of the dual-cylinder extension system extend synchronously so as to shorten the action time of the extension system, thereby improving the working efficiency.

    摘要翻译： 液压控制阀，双缸延伸系统和高空作业工程机械。 控制阀包括流量分配和收集阀，并且控制阀体设置有第一油开口，第二油开口和第三油口。 分流回收阀的第一开油口，第二油口和第三油口分别与阀体的第一油口，第二油口和第三油口连通。 控制阀具有两个工作状态，其中在第一工作状态下，第二油口与阀体的第三油口之间的油路被堵塞; 并且在第二工作状态下，打开第二油口与阀体的第三油口之间的油路。 液压控制阀能够使双缸延伸系统的两个气缸同步延伸，以缩短延伸系统的动作时间，从而提高工作效率。

    HYDRAULIC DRIVE UNIT
    3.
    发明公开
    HYDRAULIC DRIVE UNIT 有权
    液压天然气

    公开(公告)号：EP1541872A4

    公开(公告)日：2005-10-05

    申请号：EP03762902

    申请日：2003-07-09

    申请人： HITACHI CONSTRUCTION MACHINERY

    发明人： KAJITA YUSUKE ,  NAKAMURA KAZUNORI ,  HIRATA TOICHI

    IPC分类号： E02F9/22 ,  F15B11/024 ,  F15B11/028 ,  F15B11/06 ,  F15B21/14 ,  F15B11/00

    CPC分类号： F15B11/06 ,  E02F9/2228 ,  E02F9/226 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/024 ,  F15B11/028 ,  F15B21/14 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/30525 ,  F15B2211/3058 ,  F15B2211/3116 ,  F15B2211/31576 ,  F15B2211/329 ,  F15B2211/40507 ,  F15B2211/40515 ,  F15B2211/41545 ,  F15B2211/428 ,  F15B2211/6355 ,  F15B2211/7114 ,  F15B2211/88

    摘要： In order to release an excessive rod pressure in a first hydraulic cylinder and make effective use of the pressure oil in the rod-side chamber thereof at the time of operation when pressure oil is supplied to the bottom-side chamber of a second hydraulic cylinder, the hydraulic drive unit comprises a boom cylinder (6), an arm cylinder (7), a communication passage (40) establishing communication between the rod-side chamber (6b) of the boom cylinder (6) and the bottom-side chamber (7a) of the arm cylinder (7), and a switching valve (57) installed in the communication passage (40) for opening or closing the communication passage (40) according to the rod pressure in the boom cylinder (6), wherein an arm crowd single-operation is performed, in which when the reaction force of excavation causes the rod pressure in the boom cylinder (6) to take a predetermined high pressure value or above, a switching valve (57) switches from the cut-off position to the communication position, whereupon the pressure oil in the rod-side chamber (6b) of the boom cylinder (6) is supplied to the bottom-side chamber (7a) of the arm cylinder (7), and the boom cylinder (6) is automatically extended, thereby precluding the possibility of the vehicle body of the hydraulic shovel floating up.

    摘要翻译： 为了允许从第一液压缸释放过大的杆压力，并且在执行将压力油供给到第二液压缸的底部室的操作时，还可以有效地使用其杆室的压力油，液压驱动单元设置有 动臂缸6，斗杆缸7，将动臂缸6的杆室6b和斗杆缸7的底部室7a相互连通的连通路40以及设置在通信线40上的交换阀57， 或者根据动臂缸6的杆压力切断通信线40.当进行搂抱单一操作并且通过其挖掘反作用力时，动臂缸6的杆压力至少上升到高压 在预定压力下，切换阀57从关闭位置切换到连通位置，以将压力油从动臂缸6的杆室6b供给到 因此，动臂缸6自动延伸，从而避免了液压挖掘机的主体的升降。

    HYDRAULIC DRIVE UNIT
    4.
    发明公开
    HYDRAULIC DRIVE UNIT 有权
    液压驱动单元

    公开(公告)号：EP1541872A1

    公开(公告)日：2005-06-15

    申请号：EP03762902.9

    申请日：2003-07-09

    申请人： Hitachi Construction Machinery Co., Ltd.

    发明人： KAJITA, Yusuke ,  NAKAMURA, Kazunori ,  HIRATA, Toichi

    IPC分类号： F15B11/00 ,  E02F9/22

    CPC分类号： F15B11/06 ,  E02F9/2228 ,  E02F9/226 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/024 ,  F15B11/028 ,  F15B21/14 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/30525 ,  F15B2211/3058 ,  F15B2211/3116 ,  F15B2211/31576 ,  F15B2211/329 ,  F15B2211/40507 ,  F15B2211/40515 ,  F15B2211/41545 ,  F15B2211/428 ,  F15B2211/6355 ,  F15B2211/7114 ,  F15B2211/88

    摘要： To permit releasing an excessive rod pressure from a first hydraulic cylinder and also effectively using pressure oil of its rod chamber upon performing such an operation that pressure oil is fed to a bottom chamber of a second hydraulic cylinder, a hydraulic drive unit is provided with a boom cylinder 6, an arm cylinder 7, a communication line 40 communicating a rod chamber 6b of the boom cylinder 6 and a bottom chamber 7a of the arm cylinder 7 with each other, and a switching valve 57 arranged on the communication line 40 for communicating or shutting off the communication line 40 in accordance with a rod pressure of the boom cylinder 6. When an arm-crowding single operation is performed and by its digging counterforce, a rod pressure of the boom cylinder 6 rises to a high pressure of at least a predetermined pressure, the switching valve 57 is changed over from a shut-off position to a communicating position to feed pressure oil from the rod chamber 6b of the boom cylinder 6 to the bottom chamber 7a of the arm cylinder 7. The boom cylinder 6 is hence caused to automatically extend, thereby avoiding lifting of a body of a hydraulic excavator.

    摘要翻译： 为了在第一液压缸释放过大的杆压并且在执行将压力油供给到第二液压缸的底部室的操作时有效地利用其杆腔的压力油，液压驱动单元设置有 动臂缸6，斗杆缸7，使动臂缸6的活塞杆室6b与斗杆缸7的底室7a连通的连通管40，以及配置在连通管40上的切换阀57， 或者根据动臂油缸6的杆压力关闭通信线路40.当进行斗杆单独操作并且通过其挖掘反作用力时，动臂油缸6的杆压力上升到至少高压 在预定的压力下，切换阀57从关闭位置切换到连通位置，以将动臂油缸6的活塞杆室6b的压力油输送到 因此使动臂缸6自动地伸长，从而避免了液压挖掘机的主体的抬起。

    ANTRIEBSSYSTEM FÜR HYDRAULISCHE PRESSEN
    6.
    发明公开
    ANTRIEBSSYSTEM FÜR HYDRAULISCHE PRESSEN 审中-公开
    驱动系统，液压机

    公开(公告)号：EP2183096A1

    公开(公告)日：2010-05-12

    申请号：EP08801211.7

    申请日：2008-08-21

    申请人： Wieber, Christian

    发明人： Wieber, Christian

    IPC分类号： B30B15/24 ,  B21D28/20 ,  F15B7/00

    CPC分类号： B30B15/245 ,  B30B15/24 ,  F15B11/22 ,  F15B2211/7114

    摘要： The invention relates to a drive system for hydraulic presses, which allows constant and symmetrical prestressing of the press frame (1), said prestressing being independent of the required forming force, and thus precise guidance of the slide (2), wherein the drive (20) must only apply the energy in fact required for the forming operation. By rigidly coupling (19c) a plurality of movable separating elements (18a, 18b) having a common drive (20), through an appropriate association of the counter-acting cylinders (9a, 9b) with the hydraulic coupling device (17a, 17b) passive and force-neutral parallelism control of the slide (2) can be achieved, whereby for one the maximum slide tilt during eccentric load is limited, and secondly the force to be applied by the drive (20) furthermore is proportional to the forming force in fact required. If increased requirements are placed on the parallelism of the slide (2), said parallelism control may be superimposed by an active parallelism control (25, 26), which has high dynamics due to the low volume currents. Due to the prestressing of the press frame (1) being constant during the entire press stroke, elastic deformations are minimized, and furthermore, as a result of the constant pressure in the slide cylinder (6), the hydraulic medium volume enclosed therein has no influence on efficiency and cycle times. By minimizing the hydraulic fluid volumes enclosed in the counter-acting cylinders (9a, 9b) and the pressure chambers directly connected thereto, particularly during short working strokes high efficiency and short cycle times are achieved, and during cutting and stamping operations low cutting impact energy is achieved.