利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

20 条记录 (耗时 0.02 秒)

    HYDRAULIC DRIVING DEVICE OF CONSTRUCTION EQUIPMENT
    13.
    发明授权
    HYDRAULIC DRIVING DEVICE OF CONSTRUCTION EQUIPMENT 失效
    用夹具的液压驱动装置。

    公开(公告)号：EP0427865B1

    公开(公告)日：1994-08-03

    申请号：EP90907385.0

    申请日：1990-05-01

    申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

    发明人： HIRATA, Toichi ,  TANAKA, Hideaki ,  SUGIYAMA, Genroku ,  KAJITA, Yusuke

    IPC分类号： F15B11/05

    CPC分类号： F15B13/0417 ,  E02F9/2232 ,  E02F9/2296

    摘要： A hydraulic driving device of construction equipment in accordance with the present invention includes a hydraulic pump (1), an actuator (2) operated by a pressure oil discharged from this hydraulic pump, a flow rate control valve (5) disposed between the pump and the actuator, pressure compensation valves (8, 8A, 8B) for controlling pressure difference (Pz - PLS) across this flow rate control valve and pump flow rate control means (9) for controlling the flow rate discharged from the pump in accordance with the pressure difference (Pd - PLS) between the pump pressure and the load pressure of the actuator. The pressure compensation valve is equipped with valve body (23, 23A, 23B), first control means for imparting a first control force based on pressure difference across the flow rate control valve to the valve body and biasing it in a valve closing direction, and second control means (31, 50, 51) for imparting a predetermined second control force to the valve body and biasing it in a valve opening direction. The pressure compensation valve (8, 8A, 8B) is equipped with third control means (32, 35; 62) for imparting a third control force based on the pressure difference (Pd - PLS) between the pump pressure and the load pressure of the actuator and biasing it in the valve opening direction.

    VALVE DEVICE AND HYDRAULIC DRIVING DEVICE
    14.
    发明公开
    VALVE DEVICE AND HYDRAULIC DRIVING DEVICE 失效
    VENTIL UND HYDRAULISCHE ANTRIEBVORRICHTUNG。

    公开(公告)号：EP0477370A1

    公开(公告)日：1992-04-01

    申请号：EP90916057.4

    申请日：1990-11-01

    申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

    发明人： SUGIYAMA, Genroku ,  HIRATA, Toichi ,  KAJITA, Yusuke

    IPC分类号： F15B11/00 ,  F15B11/05

    CPC分类号： E02F9/2232 ,  E02F9/2296 ,  F15B13/0417 ,  F15B2211/30535 ,  F15B2211/5756 ,  Y10T137/87185

    摘要： This invention relates to a valve device comprising a flow control valve (8; 8A-8G) including supply passages (11; 11a, 11b) connected to pressure oil supply sources (1, 2), load passages (12; 12a, 12b) connected to an actuator (4) and first meter-in variable throttle portions (14; 14a, 14b) disposed between the supply passages and the load passages for providing an opening in accordance with an operation quantity; first signal passages (18; 16a, 17a, 16b, 17b, 18) disposed downstream of the first variable throttle portion for detecting the load pressure of the actuator; tank passages (13; 13a, 13b) connected to a tank (56); exhaust passages (30; 16b, 17b, 16a, 17a) for connecting the first signal passage to the tank passage; and second variable throttle portions (21; 21a, 21b) disposed in the exhaust passages, for changing the degree of opening in accordance with the operation quantity of the flow regulation valve to generate a control pressure different from the loadd pressure in the first signal passage, wherein the control pressure of the first signal passage is transmitted to the oil pressure supply source through the second signal passage (19). Auxiliary throttle means (22; 22a, 22b) are disposed in the first signal passage (18; 16a, 17a, 16b, 17b, 18),the load pressure detected at the passage portion (15; 15a, 15b) of the first signal passage is reduced and a pressure lower than the load pressure is generated as the control pressure in the first signal passage.

    摘要翻译： 本发明涉及一种阀装置，其包括流量控制阀（8; 8A-8G），其包括连接到压力供油源（1,2）的供应通道（11; 11a，11b），负载通道（12; 12a，12b） 连接到致动器（4）和设置在供给通道和负载通道之间的第一入口可变节流部分（14; 14a，14b），用于根据操作量提供开口; 第一信号通道（18; 16a，17a，16b，17b，18）设置在第一可变节流部分的下游，用于检测致动器的负载压力; 连接到罐（56）的油箱通道（13; 13a，13b） 用于将第一信号通道连接到油箱通道的排气通道（30; 16b，17b，16a，17a） 以及设置在排气通道中的第二可变节流部分（21; 21a，21b），用于根据流量调节阀的操作量改变开度，以产生与第一信号通道中的负载压力不同的控制压力 ，其中所述第一信号通道的控制压力经由所述第二信号通道（19）传递到所述油压供应源。 辅助节流装置（22; 22a，22b）设置在第一信号通道（18; 16a，17a，16b，17b，18）中，在第一信号的通道部分（15; 15a，15b） 通道减少，并且产生低于负载压力的压力作为第一信号通道中的控制压力。

    HYDRAULIC DRIVE APPARATUS
    17.
    发明公开
    HYDRAULIC DRIVE APPARATUS 有权
    HYDRAULISCHE ANTRIEBSVORRICHTUNG

    公开(公告)号：EP1662151A1

    公开(公告)日：2006-05-31

    申请号：EP04771548.7

    申请日：2004-08-05

    申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

    发明人： KAJITA, Yusuke ,  ISHIKAWA, Koji ,  KARASAWA, Hideo

    IPC分类号： F15B11/00 ,  E02F9/22

    CPC分类号： F15B11/024 ,  E02F9/2225 ,  E02F9/2296 ,  F15B11/16 ,  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： A hydraulic drive system is mounted on a hydraulic excavator, and is provided with a directional control valve 23 for a boom, a directional control valve 24 for an arm, a boom control device 25 for selectively controlling the directional control valve 23 for the boom, and an arm control device 26 for selectively controlling the directional control valve 24 for the arm. The directional control valves 23,24 control a boom cylinder 6 and an arm cylinder 7, respectively, which are driven by pressure oil delivered from a main hydraulic pump 21. The hydraulic drive system is provided with a communication control means for communicating a rod chamber 6b of the boom cylinder 6 and a bottom chamber 7a of the arm cylinder 7 with each other when a stroke of the arm control device 26 has become a predetermined amount S or greater. The communication control means has made it possible to effectively use pressure oil in the rod chamber of the first hydraulic cylinder, which was conventionally drained into a reservoir, irrespective of the level of a bottom pressure in the second hydraulic cylinder upon performing a combined operation that pressure oil is fed to a bottom chamber of the first hydraulic cylinder and the bottom chamber of the second hydraulic cylinder.

    摘要翻译： 液压驱动系统安装在液压挖掘机上，设有用于起重臂的方向控制阀23，用于臂的方向控制阀24，用于选择性地控制动臂用方向控制阀23的动臂控制装置25， 以及用于选择性地控制臂的方向控制阀24的臂控制装置26。 方向控制阀23,24分别控制由从主液压泵21输送的压力油驱动的动臂缸6和斗杆缸7.液压驱动系统设有连通控制装置， 当臂控制装置26的行程变为预定量S以上时，臂缸6的6b和臂缸7的底部室7a彼此相对。 通信控制装置使得可以有效地使用常规排放到储存器中的第一液压缸的杆室中的压力油，而不管第二液压缸中的底部压力的水平如何，在执行组合操作时 压力油被供给到第一液压缸的底部室和第二液压缸的底部室。

    INTERFERENCE PREVENTING DEVICE FOR TWO-PIECE BOOM TYPE HYDRAULIC EXCAVATOR
    19.
    发明公开
    INTERFERENCE PREVENTING DEVICE FOR TWO-PIECE BOOM TYPE HYDRAULIC EXCAVATOR 失效
    Kollisionsverhütungsvorrichtungfüreinen Hydraulischen Bagger mit einem zweiteiligen Arm

    公开(公告)号：EP0915208A1

    公开(公告)日：1999-05-12

    申请号：EP98900050.0

    申请日：1998-01-06

    申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

    发明人： TAKAHASHI, Ei ,  SUNAMURA, Kazuhiro ,  KAJITA, Yusuke

    IPC分类号： E02F3/43

    CPC分类号： E02F9/2292 ,  E02F3/435 ,  E02F9/2033 ,  E02F9/2285 ,  E02F9/2296

    摘要： When an arm end moves beyond a border line (K2) and into a speed reducing area (R1), a solenoid proportional pressure reducing valve (13) is actuated to reduce a pilot pressure and a speed of a first boom cylinder (1A) to thereby reduce a speed of the arm end, and when the arm end moves beyond a border line (K1) and into a recovery area (R2), a control gain block (200) calculates a recovery gain in accordance with a distance over which the arm end moves into the recovery area, and respective functions (204, 205, 206, 207, 208, 209) calculate feedback gains in accordance with an arm end speed at that time. These gains cause a second boom (2) to automatically dump in accordance with a distance over which the arm end moves into the recovery area, and an arm end speed at that time, and move and return an arm end position to the speed reducing area. Accordingly, an operation for moving a working front toward this side is performed smoothly to improve a work efficiency.

    摘要翻译： 当臂端移动超过边界线（K2）并进入减速区域（R1）时，致动电磁比例减压阀（13）以将第一起重臂液压缸（1A）的先导压力和速度降低到 从而降低臂端的速度，并且当臂端移动超过边界线（K1）并进入恢复区域（R2）时，控制增益块（200）根据距离 臂端移动到恢复区域中，并且相应的功能（204,205,206,207,208,209）根据当时的臂端速度来计算反馈增益。 这些增益使得第二起重臂（2）根据臂端移动到恢复区域中的距离和当时的臂端速度自动倾倒，并且将臂端位置移动并返回到减速区域 。 因此，平稳地进行向该侧移动作业前端的动作，提高作业效率。

    HYDRAULIC DRIVING DEVICE OF CONSTRUCTION EQUIPMENT
    20.
    发明公开
    HYDRAULIC DRIVING DEVICE OF CONSTRUCTION EQUIPMENT 失效
    HYDRAULISCHE ANTRIEBSANORDNUNG EINER BAUVORRICHTUNG。

    公开(公告)号：EP0427865A1

    公开(公告)日：1991-05-22

    申请号：EP90907385.0

    申请日：1990-05-01

    申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

    发明人： HIRATA, Toichi ,  TANAKA, Hideaki ,  SUGIYAMA, Genroku ,  KAJITA, Yusuke

    IPC分类号： F15B11/05

    CPC分类号： F15B13/0417 ,  E02F9/2232 ,  E02F9/2296

    摘要： A hydraulic driving device of construction equipment in accordance with the present invention includes a hydraulic pump (1), an actuator (2) operated by a pressure oil discharged from this hydraulic pump, a flow rate control valve (5) disposed between the pump and the actuator, pressure compensation valves (8, 8A, 8B) for controlling pressure difference (Pz - PLS) across this flow rate control valve and pump flow rate control means (9) for controlling the flow rate discharged from the pump in accordance with the pressure difference (P d - PLS) between the pump pressure and the load pressure of the actuator. The pressure compensation valve is equipped with valve body (23,23A, 23B), first control means for imparting a first control force based on pressure difference across the flow rate control valve to the valve body and biasing it in a valve closing direction, and second control means (31, 50, 51) for imparting a predetermined second control force to the valve body and biasing it in a valve opening direction. The pressure compensation valve (8, 8A, 8B) is equipped with third control means (32, 35; 62) for imparting a third control force based on the pressure difference (P d - PLS) between the pump pressure and the load pressure of the actuator and biasing it in the valve opening direction.

    摘要翻译： 根据本发明的施工设备的液压驱动装置包括液压泵（1），由从该液压泵排出的压力油操作的致动器（2），流量控制阀（5），设置在泵和 致动器，用于控制该流量控制阀两端的压力差（Pz-PLS）的压力补偿阀（8,8A，8B）和泵流量控制装置（9），用于控制从泵排出的流量 泵压力与执行器的负载压力之间的压力差（Pd-PLS）。 压力补偿阀配备有阀体（23,23A，23B），第一控制装置，用于基于流量控制阀上的压力差向阀体施加第一控制力，并将其按关闭方向偏压;以及 第二控制装置（31,50,51），用于向阀体施加预定的第二控制力并将其偏压在阀打开方向上。 压力补偿阀（8,8A，8B）配备有第三控制装置（32,35; 62），用于基于泵压力和泵压力之间的压力差（Pd-PLS）来施加第三控制力 致动器并将其偏压在阀打开方向上。