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1. 发明授权

US07434394B2 Hydraulic drive device 有权
标题翻译：液压驱动装置
公开(公告)号：US07434394B2
公开(公告)日：2008-10-14
申请号：US10553414
申请日：2004-04-16
申请人： Kouji Ishikawa , Yusuke Kajita , Kazunori Nakamura , Genroku Sugiyama , Hideo Karasawa
发明人： Kouji Ishikawa , Yusuke Kajita , Kazunori Nakamura , Genroku Sugiyama , Hideo Karasawa
IPC分类号： F16D31/02 , F15B13/06
CPC分类号： E02F9/2235 , E02F9/2285 , E02F9/2296
摘要： To permit using hold-side pressure oil in a first hydraulic cylinder for the acceleration of a second hydraulic cylinder upon performing a combined operation of the first and second hydraulic cylinders, a hydraulic drive system is provided with a main hydraulic pump 21, a boom cylinder 6 and an arm cylinder 7, a directional control valve 23 for a boom and a directional control valve 24 for an arm, and a boom control device 25 and an arm control device 26. The hydraulic drive system is also provided with a pressure oil feed means for feeding pressure oil in a rod chamber 6b of the boom cylinder 6 to an upstream side of the directional control valve 24 for the arm when a bottom pressure of the arm cylinder 7 has increased to a high pressure equal to or higher than a predetermined pressure. This pressure oil feed means includes a flow combiner valve 44 arranged in a reservoir line 42 which can communicate to the rod chamber 6b of the boom cylinder 6. When the bottom pressure of the arm cylinder 7 is the predetermined pressure or higher, the flow combiner valve 44 maintains a communication line 40, which communicates the reservoir line 42 and the upstream side of the directional control valve 24 for the arm with each other, in a state that pressure oil can be fed to the upstream side of the directional control valve 24 for the arm.
摘要翻译：为了在执行第一和第二液压缸的组合操作时允许在第一液压缸中使用保持侧压力油来加速第二液压缸，液压驱动系统设置有主液压泵21，动臂缸悬臂气缸7，用于悬臂的方向控制阀23和用于臂的方向控制阀24，以及起重臂控制装置25和臂控制装置26。液压驱动系统还设置有压力油进给装置，用于当臂缸7的底部压力向臂的方向控制阀24的上游侧供给动臂缸6的杆室6b中的压力油时已经增加到等于或高于预定压力的高压。该压力供油装置包括设置在储存管路42中的流动组合器阀44，该储存管路42可与动臂缸6的杆室6b连通。当气缸7的底部压力为预定压力或更高压力时，组合阀44保持连通管路40，该连通管路40将储存管路42和臂的方向控制阀24的上游侧彼此连通，在压力油可以供给到用于臂的方向控制阀24的上游侧的状态下。

2. 发明申请

US20070028607A1 Hydraulic drive device 有权
标题翻译：液压驱动装置
公开(公告)号：US20070028607A1
公开(公告)日：2007-02-08
申请号：US10553414
申请日：2004-04-16
申请人： Kouji Ishikawa , Yusuke Kajita , Kazunori Nakamura , Genroku Sugiyama , Hideo Karasawa
发明人： Kouji Ishikawa , Yusuke Kajita , Kazunori Nakamura , Genroku Sugiyama , Hideo Karasawa
IPC分类号： F03C1/00
CPC分类号： E02F9/2235 , E02F9/2285 , E02F9/2296
摘要： To permit using hold-side pressure oil in a first hydraulic cylinder for the acceleration of a second hydraulic cylinder upon performing a combined operation of the first and second hydraulic cylinders, a hydraulic drive system is provided with a main hydraulic pump 21, a boom cylinder 6 and an arm cylinder 7, a directional control valve 23 for a boom and a directional control valve 24 for an arm, and a boom control device 25 and an arm control device 26. The hydraulic drive system is also provided with a pressure oil feed means for feeding pressure oil in a rod chamber 6b of the boom cylinder 6 to an upstream side of the directional control valve 24 for the arm when a bottom pressure of the arm cylinder 7 has increased to a high pressure equal to or higher than a predetermined pressure. This pressure oil feed means includes a flow combiner valve 44 arranged in a reservoir line 42 which can communicate to the rod chamber 6b of the boom cylinder 6. When the bottom pressure of the arm cylinder 7 is the predetermined pressure or higher, the flow combiner valve 44 maintains a communication line 40, which communicates the reservoir line 42 and the upstream side of the directional control valve 24 for the arm with each other, in a state that pressure oil can be fed to the upstream side of the directional control valve 24 for the arm.
摘要翻译：为了在执行第一和第二液压缸的组合操作时允许在第一液压缸中使用保持侧压力油来加速第二液压缸，液压驱动系统设置有主液压泵21，动臂缸悬臂气缸7，用于悬臂的方向控制阀23和用于臂的方向控制阀24，以及悬臂控制装置25和臂控制装置26.液压驱动系统还设有压力油进给用于当臂缸7的底部压力增加到等于或高于其的高压时将臂架缸6的杆室6b中的压力油供给到用于臂的方向控制阀24的上游侧的装置预定压力。该压力供油装置包括配置在储存管路42中的流动组合器阀44，其可与臂缸6的杆室6b连通。当臂缸7的底部压力为预定压力或更高时，组合阀44保持连通管线40，该连通管线40在压力油可以被供给到方向控制阀的上游侧的状态下将储存管路42和用于臂的方向控制阀24的上游侧彼此连通 24为手臂。

3. 发明申请

US20090199552A1 HYDRAULIC WORKING MACHINE 有权
标题翻译：液压工作机
公开(公告)号：US20090199552A1
公开(公告)日：2009-08-13
申请号：US12428203
申请日：2009-04-22
申请人： Toshihiro Abe , Yusuke Kajita , Kazunori Nakamura , Kouji Ishikawa , Hideo Karasawa
发明人： Toshihiro Abe , Yusuke Kajita , Kazunori Nakamura , Kouji Ishikawa , Hideo Karasawa
IPC分类号： F15B13/042
CPC分类号： F15B11/024 , E02F9/2203 , E02F9/2217 , E02F9/2235 , E02F9/2239 , E02F9/2285 , E02F9/2296 , F15B2211/20546 , F15B2211/20576 , F15B2211/3052 , F15B2211/3116 , F15B2211/3133 , F15B2211/31576 , F15B2211/31582 , F15B2211/329 , F15B2211/6313 , F15B2211/6316 , Y02P80/13
摘要： A hydraulic circuit for a hydraulic working machine is composed of a main pump 21, a boom cylinder 11 arranged for extension or contraction by pressure oil from the main pump 21, a directional control valve 22 for controlling flows of pressure oil to be fed from the main pump 21 to a bottom chamber 11a and rod chamber 12b of the boom cylinder 11, a control unit 23 for performing a change-over control of the directional control valve 22, a pilot pump 24, a jack-up selector valve 25 for controlling a flow of pressure oil delivered from the pilot pump 24, a flow control valve 26 connected on an upstream side of the directional control valve 22 to a meter-in port of the directional control valve 22 such that the flow control valve 26 can be changed over by the jack-up selector valve 25, and a center bypass selector valve 27 connected on a downstream side of the directional control valve 22 to a center bypass port of the directional control valve 22 such that the center bypass selector valve 27 can be changed over by the jack-up selector valve 25. The hydraulic circuit performs a change-over of the jack-up selector valve 25 in accordance with a bottom pressure on the boom cylinder 11.
摘要翻译：用于液压作业机的液压回路由主泵21，由主泵21的压力油而设置成伸缩的动臂缸11，用于控制从主泵21供给的压力油的流量的方向控制阀22 主泵21连接到动臂缸11的底室11a和杆室12b，用于执行方向控制阀22的转换控制的控制单元23，先导泵24，用于控制的自升式选择阀25 从先导泵24输送的压力油流，连接在方向控制阀22的上游侧的流量控制阀26到方向控制阀22的计量口，使得可以改变流量控制阀26 以及由方向控制阀22的下游侧连接到方向控制阀22的中心旁通口的中央旁通选择阀27，使得中心旁通选择阀valv e 27可以由升降选择阀25切换。液压回路根据悬臂液压缸11的底部压力进行自升式换向阀25的切换。

4. 发明申请

US20060162543A1 Hydraulic working machine 有权
标题翻译：液压作业机
公开(公告)号：US20060162543A1
公开(公告)日：2006-07-27
申请号：US10542201
申请日：2004-01-14
申请人： Toshihiro Abe , Yusuke Kajita , Kazunori Nakamura , Kouji Ishikawa , Hideo Karasawa
发明人： Toshihiro Abe , Yusuke Kajita , Kazunori Nakamura , Kouji Ishikawa , Hideo Karasawa
IPC分类号： F15B13/04
CPC分类号： F15B11/024 , E02F9/2203 , E02F9/2217 , E02F9/2235 , E02F9/2239 , E02F9/2285 , E02F9/2296 , F15B2211/20546 , F15B2211/20576 , F15B2211/3052 , F15B2211/3116 , F15B2211/3133 , F15B2211/31576 , F15B2211/31582 , F15B2211/329 , F15B2211/6313 , F15B2211/6316 , Y02P80/13
摘要： A hydraulic circuit for a hydraulic working machine is composed of a main pump 21, a boom cylinder 11 arranged for extension or contraction by pressure oil from the main pump 21, a directional control valve 22 for controlling flows of pressure oil to be fed from the main pump 21 to a bottom chamber 11a and rod chamber 12b of the boom cylinder 11, a control unit 23 for performing a change-over control of the directional control valve 22, a pilot pump 24, a jack-up selector valve 25 for controlling a flow of pressure oil delivered from the pilot pump 24, a flow control valve 26 connected on an upstream side of the directional control valve 22 to a meter-in port of the directional control valve 22 such that the flow control valve 26 can be changed over by the jack-up selector valve 25, and a center bypass selector valve 27 connected on a downstream side of the directional control valve 22 to a center bypass port of the directional control valve 22 such that the center bypass selector valve 27 can be changed over by the jack-up selector valve 25. The hydraulic circuit performs a change-over of the jack-up selector valve 25 in accordance with a bottom pressure on the boom cylinder 11.
摘要翻译：用于液压作业机的液压回路由主泵21，由主泵21的压力油而设置成伸缩的动臂缸11，用于控制从主泵21供给的压力油的流量的方向控制阀22 主泵21到动臂缸11的底部室11a和杆室12b，用于执行方向控制阀22的转换控制的控制单元23，先导泵24，自升式选择阀25 用于控制从先导泵24输送的压力油的流量，连接在方向控制阀22的上游侧的流量控制阀26到方向控制阀22的计量口，使得流量控制阀26可以由上升换向阀25和由方向控制阀22的下游侧连接到方向控制阀22的中心旁通口的中央旁通选择阀27进行切换，使得中心旁路塞转子阀27可以由自升式选择阀25切换。液压回路根据悬臂液压缸11的底部压力进行自升式换向阀25的切换。

5. 发明授权

US07562615B2 Hydraulic working machine 有权
标题翻译：液压作业机
公开(公告)号：US07562615B2
公开(公告)日：2009-07-21
申请号：US10542201
申请日：2004-01-14
申请人： Toshihiro Abe , Yusuke Kajita , Kazunori Nakamura , Kouji Ishikawa , Hideo Karasawa
发明人： Toshihiro Abe , Yusuke Kajita , Kazunori Nakamura , Kouji Ishikawa , Hideo Karasawa
IPC分类号： F15B13/04
CPC分类号： F15B11/024 , E02F9/2203 , E02F9/2217 , E02F9/2235 , E02F9/2239 , E02F9/2285 , E02F9/2296 , F15B2211/20546 , F15B2211/20576 , F15B2211/3052 , F15B2211/3116 , F15B2211/3133 , F15B2211/31576 , F15B2211/31582 , F15B2211/329 , F15B2211/6313 , F15B2211/6316 , Y02P80/13
摘要： A hydraulic circuit for a hydraulic working machine is composed of a main pump 21, a boom cylinder 11 arranged for extension or contraction by pressure oil from the main pump 21, a directional control valve 22 for controlling flows of pressure oil to be fed from the main pump 21 to a bottom chamber 11a and rod chamber 12b of the boom cylinder 11, a control unit 23 for performing a change-over control of the directional control valve 22, a pilot pump 24, a jack-up selector valve 25 for controlling a flow of pressure oil delivered from the pilot pump 24, a flow control valve 26 connected on an upstream side of the directional control valve 22 to a meter-in port of the directional control valve 22 such that the flow control valve 26 can be changed over by the jack-up selector valve 25, and a center bypass selector valve 27 connected on a downstream side of the directional control valve 22 to a center bypass port of the directional control valve 22 such that the center bypass selector valve 27 can be changed over by the jack-up selector valve 25. The hydraulic circuit performs a change-over of the jack-up selector valve 25 in accordance with a bottom pressure on the boom cylinder 11.
摘要翻译：用于液压作业机的液压回路由主泵21，由主泵21的压力油而设置成伸缩的动臂缸11，用于控制从主泵21供给的压力油的流量的方向控制阀22 主泵21连接到动臂缸11的底室11a和杆室12b，用于执行方向控制阀22的转换控制的控制单元23，先导泵24，用于控制的自升式选择阀25 从先导泵24输送的压力油流，连接在方向控制阀22的上游侧的流量控制阀26到方向控制阀22的计量口，使得可以改变流量控制阀26 以及由方向控制阀22的下游侧连接到方向控制阀22的中心旁通口的中央旁通选择阀27，使得中心旁通选择阀valv e 27可以由升降选择阀25切换。液压回路根据悬臂液压缸11的底部压力进行自升式换向阀25的切换。

6. 发明授权

US08336443B2 Hydraulic working machine 有权
标题翻译：液压作业机
公开(公告)号：US08336443B2
公开(公告)日：2012-12-25
申请号：US12428203
申请日：2009-04-22
申请人： Toshihiro Abe , Yusuke Kajita , Kazunori Nakamura , Kouji Ishikawa , Hideo Karasawa
发明人： Toshihiro Abe , Yusuke Kajita , Kazunori Nakamura , Kouji Ishikawa , Hideo Karasawa
IPC分类号： F15B11/024
CPC分类号： F15B11/024 , E02F9/2203 , E02F9/2217 , E02F9/2235 , E02F9/2239 , E02F9/2285 , E02F9/2296 , F15B2211/20546 , F15B2211/20576 , F15B2211/3052 , F15B2211/3116 , F15B2211/3133 , F15B2211/31576 , F15B2211/31582 , F15B2211/329 , F15B2211/6313 , F15B2211/6316 , Y02P80/13
摘要： A hydraulic circuit for a hydraulic working machine is composed of a main pump 21, a boom cylinder 11 arranged for extension or contraction by pressure oil from the main pump 21, a directional control valve 22 for controlling flows of pressure oil to be fed from the main pump 21 to a bottom chamber 11a and rod chamber 12b of the boom cylinder 11, a control unit 23 for performing a change-over control of the directional control valve 22, a pilot pump 24, a jack-up selector valve 25 for controlling a flow of pressure oil delivered from the pilot pump 24, a flow control valve 26 connected on an upstream side of the directional control valve 22 to a meter-in port of the directional control valve 22 such that the flow control valve 26 can be changed over by the jack-up selector valve 25, and a center bypass selector valve 27 connected on a downstream side of the directional control valve 22 to a center bypass port of the directional control valve 22 such that the center bypass selector valve 27 can be changed over by the jack-up selector valve 25. The hydraulic circuit performs a change-over of the jack-up selector valve 25 in accordance with a bottom pressure on the boom cylinder 11.
摘要翻译：用于液压作业机的液压回路由主泵21，由主泵21的压力油而设置成伸缩的动臂缸11，用于控制从主泵21供给的压力油的流量的方向控制阀22 主泵21连接到动臂缸11的底室11a和杆室12b，用于执行方向控制阀22的转换控制的控制单元23，先导泵24，用于控制的自升式选择阀25 从先导泵24输送的压力油流，连接在方向控制阀22的上游侧的流量控制阀26到方向控制阀22的计量口，使得可以改变流量控制阀26 以及由方向控制阀22的下游侧连接到方向控制阀22的中心旁通口的中央旁通选择阀27，使得中心旁通选择阀valv e 27可以由升降选择阀25切换。液压回路根据悬臂液压缸11的底部压力进行自升式换向阀25的切换。

7. 发明授权

US5267440A Hydraulic control system for construction machine 失效
标题翻译：施工机械液压控制系统
公开(公告)号：US5267440A
公开(公告)日：1993-12-07
申请号：US854668
申请日：1992-05-04
申请人： Kazunori Nakamura , Yusuke Kajita , Toichi Hirata , Genroku Sugiyama , Hiroshi Onoue , Hideaki Tanaka , Osamu Tomikawa , Masakazu Haga , Hiroshi Watanabe
发明人： Kazunori Nakamura , Yusuke Kajita , Toichi Hirata , Genroku Sugiyama , Hiroshi Onoue , Hideaki Tanaka , Osamu Tomikawa , Masakazu Haga , Hiroshi Watanabe
IPC分类号： E02F9/22 , F16D31/02 , F15B11/08 , F15B13/00
CPC分类号： E02F9/2285 , E02F9/2232 , E02F9/2235 , E02F9/2296
摘要： In a controller (229) of a hydraulic control system for construction machines, a valve control signal calculating function (301) works such that when an operation pattern signal (A-I) for actuators (201, 202 . . . ) is outputted, it selects corresponding one of plural output patterns for an auxiliary valve control pressure stored, as a function of a differential pressure signal between a pump delivery pressure and a maximum load pressure, in relation to the operation pattern signals, followed by calculating an auxiliary valve control pressure (Pc) dependent upon the differential pressure signal based on the selected output pattern, and also selects corresponding one of plural sets of rates of change (K . . . , K . . . ) for the auxiliary valve control pressure stored in relation to the operation pattern signals, followed by combining the calculated auxiliary valve control amount with the selected set of speed changes to calculate each of valve control signals (S21-S26).

8. 发明授权

US5152140A Pressure compensating valve spool positioned by difference in pressure receiving areas for load and inlet pressures 失效
标题翻译：压力补偿阀由压力接收区域负载和入口压力的差异定位
公开(公告)号：US5152140A
公开(公告)日：1992-10-06
申请号：US640440
申请日：1991-02-06
申请人： Toichi Hirata , Hideaki Tanaka , Genroku Sugiyama , Yusuke Kajita , Kazunori Nakamura
发明人： Toichi Hirata , Hideaki Tanaka , Genroku Sugiyama , Yusuke Kajita , Kazunori Nakamura
IPC分类号： E02F9/22 , F15B13/04
CPC分类号： F15B13/0417 , E02F9/2232 , E02F9/2296 , Y10T137/7858
摘要： A hydraulic drive system has a hydraulic pump (1), an actuator (2), a flow control valve (5) disposed between the hydraulic pump and the actuator, a pressure compensating valve (8; 8A; 8B) having a valve spool (23; 23A; 23B) that controls the differential pressure (Pz-PLS) across the flow control valve, and a pump delivery rate control device (9) for controlling a flow rate of the hydraulic fluid delivered from the hydraulic pump dependent on a differential pressure (Pd-PLS) between a pump pressure and a load pressure of the actuator. The pressure compensating valve has a first control chamber (30; 30A) subjected to the load pressure (PLS) of the actuator such that the load pressure acts on a first pressure receiving section (28; 28A) of the valve spool to urge the valve spool in the valve-opening direction, a second control chamber (29; 29A) subjected to the inlet pressure (Pz) of the flow control valve such that the inlet pressure acts on a second pressure receiving section (27; 27A) of the valve spool to urge the valve spool in the valve-closing direction, and a target differential pressure setting arrangement (31, 50, 51; 31B, 51) for urging the valve spool in the valve-opening direction. A damping capability to the actuator (2) is provided by setting pressure receiving area (Az) of the second pressure receiving section (27; 27A) to be greater than a pressure receiving area (ALS) of the first pressure receiving section (28; 28A).
摘要翻译： PCT No.PCT / JP90 / 01310 Sec。 371日期1991年2月6日 102（e）日期1991年2月6日PCT 1990年10月11日PCT PCT。出版物WO91 / 05958 日期：1991年5月2日。液压驱动系统具有液压泵（1），致动器（2），设置在液压泵和致动器之间的流量控制阀（5），压力补偿阀（8; 8A; 8B ）具有控制跨过流量控制阀的差压（Pz-PLS）的阀芯（23; 23A; 23B）和用于控制从所述流量控制阀输送的液压流体的流量的泵输送速率控制装置（9）液压泵取决于泵压力和执行器的负载压力之间的压差（Pd-PLS）。压力补偿阀具有受到致动器的负载压力（PLS）的第一控制室（30; 30A），使得负载压力作用在阀芯的第一压力接收部分（28; 28A）上，以推动阀阀门处于阀打开方向，第二控制室（29; 29A）经受流量控制阀的入口压力（Pz），使得入口压力作用在阀的第二压力接收部分（27; 27A）上阀芯沿阀关闭方向推压阀芯，以及用于沿阀打开方向推压阀芯的目标压差设定装置（31,50,51; 31B，51）。通过将第二受压部分（27; 27A）的压力接收面积（Az）设定为大于第一压力接收部分（28; 27）的受压面积（ALS）来提供致动器（2）的阻尼能力。 28A）。

9. 发明授权

US5930996A Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump 有权
标题翻译：液压工程机械原动机自动加速系统，原动机和液压泵控制系统
公开(公告)号：US5930996A
公开(公告)日：1999-08-03
申请号：US164365
申请日：1998-10-01
申请人： Kazunori Nakamura , Ei Takahashi , Tsukasa Toyooka , Kouji Ishikawa , Tsuyoshi Nakamura , Yoichi Kowatari , Tadatoshi Shimamura , Genroku Sugiyama , Toichi Hirata
发明人： Kazunori Nakamura , Ei Takahashi , Tsukasa Toyooka , Kouji Ishikawa , Tsuyoshi Nakamura , Yoichi Kowatari , Tadatoshi Shimamura , Genroku Sugiyama , Toichi Hirata
IPC分类号： B60K25/02 , E02F9/22 , F02D29/04 , F04B49/00 , F16D31/02
CPC分类号： E02F9/2296 , E02F9/2235 , E02F9/2246 , E02F9/2282 , E02F9/2285 , E02F9/2292
摘要： In the arm-crowding or track operation, a calculating portion (700d2 or 700d4) calculates a modification gain (KAC or KTR) depending on an operation pilot pressure and a calculating portion (700g) calculates a decrease modification (DND) based on the KAC or KTR, while a calculating portion (700m or 700p) calculates a modification gain (KACH or KTRH) depending on an operation pilot pressure and calculating portions (700q-700s) calculate an increase modification (DNH) based on the KACH or KTRH. A reference target engine revolution speed NR0 is modified using the DND and DNH. In other operations than the arm-crowding and track operations, NR0 is modified using only the decrease modification (DND) calculated from the modification gain just depending on the operation pilot pressure. In the operation where an engine revolution speed is desired to become higher as an actuator load increases, the engine revolution speed can be controlled in accordance with change of the actuator load as well. In other operations, the engine revolution speed can be controlled just depending on the direction and input amount in and by which corresponding operation instructing apparatus is operated.
摘要翻译：在手臂拥挤或轨道操作中，计算部分（700d2或700d4）根据操作先导压力计算修正增益（KAC或KTR），并且计算部分（700g）基于KAC计算减小修改（DND）或KTR，而计算部分（700m或700p）根据操作先导压力计算修正增益（KACH或KTRH），并且计算部分（700q-700s）基于KACH或KTRH计算增加修改（DNH）。使用DND和DNH修改参考目标发动机转速NR0。在除了拥挤和跟踪操作之外的其他操作中，NR0仅使用根据操作先导压力从修改增益计算的减少修改（DND）进行修改。在致动器负载增加时希望发动机转速变高的操作中，也可以根据致动器负载的变化来控制发动机转速。在其他操作中，可以根据相应的操作指示装置的操作方向和输入量来控制发动机转速。

10. 发明授权

US5940997A Hydraulic circuit system for hydraulic working machine 有权
标题翻译：液压工程机液压回路系统
公开(公告)号：US5940997A
公开(公告)日：1999-08-24
申请号：US145158
申请日：1998-09-01
申请人： Tsukasa Toyooka , Toichi Hirata , Genroku Sugiyama , Kazunori Nakamura , Kouji Ishikawa , Tsuyoshi Nakamura
发明人： Tsukasa Toyooka , Toichi Hirata , Genroku Sugiyama , Kazunori Nakamura , Kouji Ishikawa , Tsuyoshi Nakamura
IPC分类号： E02F9/22
CPC分类号： E02F9/2267 , E02F9/2221 , E02F9/2232 , E02F9/2242 , E02F9/2271 , E02F9/2282 , E02F9/2285 , E02F9/2292 , E02F9/2296
摘要： A hydraulic circuit system includes a shuttle block, and shuttle valves are arranged and connected within the shuttle block. The maximum pressure in a predetermined operation signal pressure group selected from operation signal pressures generated by pilot operating units is selected to produce a control signal pressure within the shuttle block. The control signal pressure is output to control devices such as a track communicating valve, a swing brake cylinder, and regulators for hydraulic pumps.
摘要翻译：一个液压回路系统包括一个梭子块，并且梭阀布置并连接在梭子块内。从由先导操作单元产生的操作信号压力中选择的预定操作信号压力组中的最大压力被选择以产生梭模块内的控制信号压力。控制信号压力输出到诸如轨道连通阀，回转制动缸和液压泵调节器之类的控制装置。

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