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    Hydraulic circuit system for hydraulic excavator
    11.
    发明授权
    Hydraulic circuit system for hydraulic excavator 失效
    液压挖掘机液压回路系统

    公开(公告)号：US5673558A

    公开(公告)日：1997-10-07

    申请号：US596296

    申请日：1996-02-13

    申请人： Genroku Sugiyama ,  Toichi Hirata ,  Koji Ishikawa ,  Tsukasa Toyooka ,  Tsuyoshi Nakamura

    发明人： Genroku Sugiyama ,  Toichi Hirata ,  Koji Ishikawa ,  Tsukasa Toyooka ,  Tsuyoshi Nakamura

    IPC分类号： E02F3/43 ,  E02F3/85 ,  E02F9/22 ,  F16D31/02

    CPC分类号： E02F9/2282 ,  E02F9/2228 ,  E02F9/2242 ,  E02F9/2285

    摘要： For enabling a boom to be smoothly raised during the triple combined operation of boom-up, arm-crowd and bucket-crowd in a hydraulic circuit system for a hydraulic excavator, in a first valve group of a hydraulic valve apparatus (12), a variable throttle valve (70) is installed in a feeder passage (32) of a bucket directional control valve (21) downstream of a load check valve (32a), and a secondary pressure C as a boom-up operation command is introduced through a line (71) to a pilot control sector (70a) of the variable throttle valve (70) which sector operates in the throttling direction, so that when the secondary pressure C is 0 or small, the variable throttle valve (70) is fully opened and, as the secondary pressure C increases, an opening area of the variable throttle valve (70) is reduced to restrict the flow rate of a hydraulic fluid supplied through the bucket directional control valve (21).

    摘要翻译： PCT No.PCT / JP95 / 01258 Sec。 371日期1996年2月13日 102（e）日期1996年2月13日PCT提交1995年6月23日PCT公布。 公开号WO96 / 00820 日期1996年1月11日为了在液压挖掘机的液压回路系统中，在液压阀装置的第一阀组中，在起重臂，悬臂和斗斗的三重组合操作期间能够平稳地升高起重臂 （12）中，可变节流阀（70）安装在负载止回阀（32a）下游的铲斗方向控制阀（21）的供给通路（32）中，作为动臂上升操作的二次压力C 命令通过管线（71）引导到可变节流阀（70）的先导控制扇区（70a），该扇区在节流方向上操作，使得当二次压力C为0或小时，可变节流阀 70）完全打开，并且随着二次压力C增加，可变节流阀（70）的开口面积减小以限制通过铲斗方向控制阀（21）供给的液压流体的流量。

    Hydraulic driving device of civil engineering and construction machinery
    12.
    发明授权
    Hydraulic driving device of civil engineering and construction machinery 有权
    土木工程机械液压驱动装置

    公开(公告)号：US06619037B1

    公开(公告)日：2003-09-16

    申请号：US09889612

    申请日：2001-07-19

    申请人： Tsukasa Toyooka ,  Toichi Hirata ,  Genroku Sugiyama ,  Kouji Ishikawa ,  Masao Nishimura ,  Tsuyoshi Nakamura

    发明人： Tsukasa Toyooka ,  Toichi Hirata ,  Genroku Sugiyama ,  Kouji Ishikawa ,  Masao Nishimura ,  Tsuyoshi Nakamura

    IPC分类号： F16D3102

    CPC分类号： E02F9/2267 ,  E02F9/2239 ,  E02F9/2242 ,  E02F9/2271 ,  E02F9/2292

    摘要： Provided are hydraulic pumps 1,2, a control valve group 15a connected to the pump 1 and including a bypass on/off valve 7, a control valve group 15b connected to the pump 2 and including a reserve-actuator-controlling, directional control valve 11, a communication line 13 communicating a most upstream side of the control valve group 15a with a supply line 11a to the reserve-actuator-controlling, directional control valve 11, a merge control valve 14 for communicating or cutting off the communication line 13, an interlocked control means for changing over the merge control valve 14 to an open position and the bypass on/off valve 7 to a closed position in association with a change-over operation of the reserve-actuator-controlling, directional control valve 11, and a selective control valve 28 capable of taking one of a state, in which the operation to change over the merge control valve 14 by the interlocked control means is feasible, and another state in which the operation to change over the merge control valve by the interlocked control means is infeasible. The control valve group 15a, the control valve group 15b, the communication line 13 and the merge control valve 14 are arranged in a housing 15 such that a change or the like in a maximum value of an operating speed of an actuator, said operating speed being controlled by the reserve directional control valve, can be achieved.

    摘要翻译： 设有液压泵1,2，与泵1连接并包括旁通开闭阀7的控制阀组15a，连接到泵2的控制阀组15b，并且包括备用执行器控制方向控制阀 如图11所示，将控制阀组15a的最上游侧与供给管线11a连通的通信线路13配置到备用执行器控制用方向控制阀11，连通或切断通信线路13的合流控制阀14， 联合控制装置，用于将合并控制阀14转换到打开位置，旁路开/关阀7与备用执行器控制方向控制阀11的转换操作相关联地转换到关闭位置，以及 选择控制阀28，其能够采用其中一个状态，其中通过互锁控制装置切换合并控制阀14的操作是可行的;以及另一种状态，其中改变o的操作 通过互锁控制装置检查合并控制阀是不可行的。 控制阀组15a，控制阀组15b，连通管线13和合并控制阀14布置在壳体15中，使得在致动器的操作速度的最大值中的变化等，所述操作速度 由备用方向控制阀控制，可以实现。

    Hydraulic control system for hydraulic working machine
    13.
    发明授权
    Hydraulic control system for hydraulic working machine 失效
    液压作业机液压控制系统

    公开(公告)号：US5813311A

    公开(公告)日：1998-09-29

    申请号：US771158

    申请日：1996-12-20

    申请人： Tsukasa Toyooka ,  Toichi Hirata ,  Genroku Sugiyama ,  Shigehiro Yoshinaga ,  Kouji Ishikawa ,  Youichi Kowatari ,  Tsuyoshi Nakamura

    发明人： Tsukasa Toyooka ,  Toichi Hirata ,  Genroku Sugiyama ,  Shigehiro Yoshinaga ,  Kouji Ishikawa ,  Youichi Kowatari ,  Tsuyoshi Nakamura

    IPC分类号： E02F9/20 ,  E02F9/22 ,  F15B11/16

    CPC分类号： E02F9/2285 ,  E02F9/2228 ,  E02F9/2282

    摘要： A controller 520 has a data portion 520c in which the relationship between a pump delivery pressure and a target opening area of a variable throttle 300a of a control valve 300 is set such that the target opening area is large when the pump delivery pressure is low, and small when the pump delivery pressure is high. An input portion 520a takes in a detection signal from a pump pressure sensor 700, a processing portion 520b reads the data from the data portion 520c and calculates a signal output to a solenoid proportional valve 590, and an output portion 520d converts the calculated signal into a command signal for the solenoid proportional valve 590 and outputs the command signal. Upon receiving the command signal from the controller 520, the solenoid proportional valve 590 produces a command pilot pressure for the control valve 300 corresponding to the input signal and controls the opening area of the variable throttle 300a.

    摘要翻译： 控制器520具有数据部分520c，其中泵输送压力和控制阀300的可变节流阀300a的目标开口面积之间的关系被设定为当泵输送压力低时目标开口面积大， 并且当泵输送压力高时小。 输入部分520a从泵压力传感器700接收检测信号，处理部分520b从数据部分520c读取数据，并计算输出到电磁比例阀590的信号，输出部分520d将计算出的信号转换成 用于电磁比例阀590的命令信号并输出​​命令信号。 电磁比例阀590从控制器520接收到指令信号时，根据输入信号产生控制阀300的指令先导压力，并控制可变节流阀300a的开度面积。

    Hydraulic drive system for construction machines
    14.
    发明授权
    Hydraulic drive system for construction machines 失效
    施工机械液压驱动系统

    公开(公告)号：US5848531A

    公开(公告)日：1998-12-15

    申请号：US774725

    申请日：1997-01-03

    申请人： Tsuyoshi Nakamura ,  Toichi Hirata ,  Genroku Sugiyama ,  Tsukasa Toyooka ,  Youichi Kowatari ,  Kouji Ishikawa

    发明人： Tsuyoshi Nakamura ,  Toichi Hirata ,  Genroku Sugiyama ,  Tsukasa Toyooka ,  Youichi Kowatari ,  Kouji Ishikawa

    IPC分类号： E02F9/22 ,  F15B11/028 ,  F16D31/02

    CPC分类号： E02F9/2282 ,  E02F9/2228 ,  E02F9/2235 ,  E02F9/2296

    摘要： A hydraulic system for a construction machine includes a hydraulic pump driven by a prime mover, actuators driven by a hydraulic fluid delivered from the hydraulic pump, flow control valves for controlling flow of the hydraulic fluid to the actuators and operation means for operating the flow control valves. A relief value sets a relief pressure for limiting the maximum delivery pressure of the hydraulic pump and relief pressure change means increase or decrease the relief pressure set by the relief valve. The relief pressure change means automatically increase or decrease the relief pressure in accordance with the input amount of the operation means.

    摘要翻译： 用于建筑机械的液压系统包括由原动机驱动的液压泵，由从液压泵输送的液压流体驱动的致动器，用于控制液压流体到致动器的流量控制阀和用于操作流量控制的操作装置 阀门 释放值设定用于限制液压泵的最大输送压力的溢流压力，溢流压力改变装置增加或减少由安全阀设定的溢流压力。 溢流压力改变装置根据操作装置的输入量自动增加或减小溢流压力。

    Tournament oil path constituting apparatus
    17.
    发明授权
    Tournament oil path constituting apparatus 有权
    锦标赛油路构成装置

    公开(公告)号：US6161586A

    公开(公告)日：2000-12-19

    申请号：US267957

    申请日：1999-03-12

    申请人： Toichi Hirata ,  Genroku Sugiyama ,  Tsukasa Toyooka ,  Norio Onuma ,  Ikuo Inagaki ,  Masao Kashiwagi

    发明人： Toichi Hirata ,  Genroku Sugiyama ,  Tsukasa Toyooka ,  Norio Onuma ,  Ikuo Inagaki ,  Masao Kashiwagi

    IPC分类号： F15B11/16 ,  F15B13/00 ,  F15B13/08

    CPC分类号： F15B13/0807 ,  F15B11/16 ,  F15B13/081 ,  F15B2211/20553 ,  F15B2211/3116 ,  F15B2211/329 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/71 ,  Y10T137/2567 ,  Y10T137/87185 ,  Y10T137/87885

    摘要： A tournament oil path constituting apparatus in which while a laminated block is constituted by laminating a number of oil path plates, a number of shuttle valve holes and connection grooves made continuous to the shuttle valve holes are formed at overlap faces of the oil path plates, shuttle valves are integrated to the shuttle valve holes, introductory oil paths communicating with the shuttle valve holes are formed at both of the oil path plates formed with the shuttle valve holes and the oil path plates having match faces on sides of the shuttle valve holes and a high pressure oil is selected by the shuttle valves from pressure oils conducted both of the introductory oil paths and conducted to the connection grooves. The tournament oil path constituting apparatus also including a number of main paths penetrating the number of laminated oil path plates and branch grooves branched from the main paths.

    摘要翻译： 一种比赛油路构成装置，其中，通过层叠多个油路板而构成层叠块，在油路板的重叠面形成有多个往复阀孔和与梭阀孔连续的连接槽， 梭阀集成到梭阀孔中，与形成有梭阀孔的两个油路板和在梭阀孔的侧面上具有匹配面的油路板形成与梭阀孔连通的引导油路， 高压油由穿梭阀由导入两个导入油路的压力油选择并传导到连接槽。 比赛油路构成装置还包括穿过层叠油路板的数量的主要路径和从主路径分支的分支槽。

    Hydraulic drive system and directional control valve
    20.
    发明授权
    Hydraulic drive system and directional control valve 失效
    液压驱动系统和方向控制阀

    公开(公告)号：US5315826A

    公开(公告)日：1994-05-31

    申请号：US890590

    申请日：1992-07-13

    申请人： Toichi Hirata ,  Genroku Sugiyama

    发明人： Toichi Hirata ,  Genroku Sugiyama

    IPC分类号： E02F9/22 ,  F15B11/16 ,  F15B13/04 ,  F16D31/02

    CPC分类号： F15B13/0403 ,  E02F9/2232 ,  E02F9/2296 ,  F15B11/163 ,  F15B13/0417 ,  F15B2211/20546 ,  F15B2211/253 ,  F15B2211/30535 ,  F15B2211/30555 ,  F15B2211/31576 ,  F15B2211/45 ,  F15B2211/851

    摘要： A plurality of directional control valves (5, 6) respectively disposed between a hydraulic pump (50) and a plurality of actuators (3, 4) each comprises a pump port (9), a pressure chamber (10), a feeder passage (11), actuator ports (12a, 12b), a reservoir port (13), first meter-in variable restrictors (15a, 15b) disposed between the pump port and the pressure chamber, and a pressure compensating valve (16) disposed between the pressure chamber and the feeder passage and having a pair of opposite ends, one of which is subjected to a pressure in the pressure chamber and the other of which is subjected to a maximum load pressure among the plurality of actuators. The hydraulic pump (1) includes a pump flow control device (2) for controlling a delivery rate of the hydraulic pump so that a delivery pressure of the hydraulic pump is held higher by a predetermined value than the maximum pressure obtained, as a load sensing pressure, from load pressures of the plurality of actuators. At least one of the plurality of directional control valves has a bleed passage (21) for communicating between the feeder passage (11) and the reservoir port (13), and second variable restrictors (22a, 22b) disposed in the bleed passage and moved in conjunction with the first meter-in variable restrictors, making it possible to prevent abrupt operation of the actuator adapted for driving an inertial body, and suppress vibration produced in a circuit even when any of the pump delivery rate and the load pressure is fluctuated.

    摘要翻译： PCT No.PCT / JP91 / 01621 Sec。 371日期：1992年7月13日 102（e）日期1992年7月13日PCT 1991年11月26日PCT PCT。 公开号WO92 / 09809 分别设置在液压泵（50）和多个致动器（3,4）之间的多个方向控制阀（5,6）各自包括泵口（9），压力室（ 10），馈送通道（11），致动器端口（12a，12b），储存器端口（13），设置在泵口和压力室之间的第一计量可变节流器（15a，15b）和压力补偿 阀（16）设置在压力室和进料通道之间并且具有一对相对端，其中一个在压力室中承受压力，另一个在多个致动器之间经受最大负载压力 。 液压泵（1）包括用于控制液压泵的输送速率的泵流量控制装置（2），使得液压泵的输送压力比所获得的最大压力保持高达预定值，作为负载感测 来自多个致动器的负载压力。 所述多个方向控制阀中的至少一个具有用于在所述供给通道（11）和所述储存器端口（13）之间连通的排放通道（21）和设置在所述排出通道中并移动的第二可变节流器（22a，22b） 结合第一计量可变节流器，可以防止适用于驱动惯性体的致动器的突然操作，并且即使在任何一个泵输送速率和负载压力波动时也抑制在回路中产生的振动。