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1. 发明申请

WO1998006946A1 APPARATUS FOR DIAGNOSING FAILURE OF HYDRAULIC PUMP FOR WORK MACHINE 审中-公开
标题翻译：用于诊断工作机械液压泵故障的装置
公开(公告)号：WO1998006946A1
公开(公告)日：1998-02-19
申请号：PCT/JP1997002771
申请日：1997-08-07
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , TANAKA, Yasuo , OCHIAI, Masami , YAGYU, Takashi , HASHIMOTO, Akira , FURUNO, Yoshinori , WATANABE, Yutaka , SUGIYAMA, Yukihiko
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F04B51/00
CPC分类号： F15B20/004 , E02F9/2235 , E02F9/226 , E02F9/2282 , E02F9/2292 , E02F9/2296 , E02F9/26 , F04B49/065 , F04B51/00 , F04B2205/063
摘要： An apparatus for diagnosing failure of hydraulic pumps for a work machine, which apparatus is inexpensive and capable of surely specifying a faulty hydraulic pump or pumps. Pressure sensors (61-64) are provided on lines (30, 40) leading to a tank (T) from locations leaving center bypasses of flow control valves (21, 231-234, 451-454, 26) connected to hydraulic pumps (1-6), and respective solenoid directional control valves (51-56) are provided on input circuits of respective regulators (11-16) to permit, when excited, pressure from a pilot pump (7) to be introduced into the regulators (11-16). When a switch (80) commands judgement with all the flow control valves in neutral positions, a signal from a processing device (70) energizes one of the solenoid directional control valves to cause a corresponding hydraulic pump to discharge a fluid at a maximum flow rate. A detected value from an associated pressure sensor at this time is converted into a flow rate and stored, and this sequence is carried out with respect to the respective hydraulic pumps. On the basis of flow rates obtained from every judgement, failure of a specified hydraulic pump or pumps is diagnosed.
摘要翻译：一种用于诊断作业机械的液压泵的故障的装置，该装置便宜并能够确定地指定故障的液压泵或泵。压力传感器（61-64）设置在从连接到液压泵的流量控制阀（21,231-234,451-454,26）的中心旁路的位置通向罐（T）的管线（30,40） 1-6），并且各个电磁换向控制阀（51-56）设置在相应的调节器（11-16）的输入电路上，以允许当被激励时来自先导泵（7）的压力被引入调节器 11-16）。当开关（80）命令所有流量控制阀在中立位置的判断时，来自处理装置（70）的信号使电磁方向控制阀之一通电，使相应的液压泵以最大流量排出流体。此时，来自相关压力传感器的检测值被转换为流量并存储，并且该顺序相对于相应的液压泵执行。根据从每个判断获得的流量，诊断指定的液压泵或泵的故障。

2. 发明申请

WO1997047826A1 HYDRAULIQUE DRIVE DEVICE 审中-公开
标题翻译： HYDRAULIQUE驱动装置
公开(公告)号：WO1997047826A1
公开(公告)日：1997-12-18
申请号：PCT/JP1997001103
申请日：1997-03-31
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , TANAKA, Sotaro , YASUDA, Gen , OCHIAI, Masami , NOZAWA, Yusaku , KATO, Hideyo
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： E02F09/22
CPC分类号： E02F9/2296 , E02F9/2242 , E02F9/2292
摘要： Oil hydraulic pumps (3a, 3b) are connected to main pipe lines (105, 116, 107) through a delivery pipe line (102) and a feed pipe line (100). Branches (150A, 150C, 150E) are provided with flow control valves (15, 17, 19), which permit a pressure oil to flow to hydraulic oil cylinders (5a, 5b, 6, 7) from the oil hydraulic pumps (3a, 3b). A pressure oil tank (2) is connected to the main pipe lines (105, 116, 107) through a tank pipe line (103) and a discharge pipe line (101). Branches (151A, 151C, 151E) are provided with flow control valves (16, 18, 20), which permit a pressure oil to flow to the pressure oil tank (2) from the hydraulic cylinders (5a, 5b, 6, 7). A pipe line (104) branched from the delivery pipe line (102) is provided with a bypass valve (21), which serves to feed a desired amount of an oil delivered from the oil hydraulic pumps (3a, 3b) to the feed pipe line (100) and return the remainder of the oil to the pressure oil tank (2).
摘要翻译：油压泵（3a，3b）通过输送管线（102）和进料管线（100）连接到主管线（105,116,107）。分支（150A，150C，150E）设置有流量控制阀（15,17,19），其允许压力油从油压泵（3a，3b）流到液压油缸（5a，5b，6,7）图3b）。压力油箱（2）通过油箱管路（103）和排放管路（101）与主管路（105,116,107）连接。分支（151A，151C，151E）设置有流量控制阀（16,18,20），其允许压力油从液压缸（5a，5b，6,7）流到压力油箱（2）。从输送管线（102）分支的管路（104）设置有旁通阀（21），其用于将从油压泵（3a，3b）输送的所需量的油供给到进料管（100）并将剩余的油返回到压力油箱（2）。

3. 发明申请

WO1994010456A1 HYDRAULIC CONTROL VALVE DEVICE AND HYDAULICALLY DRIVING DEVICE 审中-公开
标题翻译：液压控制阀装置和液压驱动装置
公开(公告)号：WO1994010456A1
公开(公告)日：1994-05-11
申请号：PCT/JP1993001558
申请日：1993-10-28
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , SUGIYAMA, Genroku , HIRATA, Toichi , NOZAWA, Yusaku , OCHIAI, Masami
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/00
CPC分类号： E02F9/2225 , F15B13/0417
摘要： A hydraulic control valve device provided with spool type flow rate control valves (200A, 201A; 200; 204), wherein in order to control a flow rate of pressure oil supplied from a pump path (5) to a pair of main variable throttles (16A, 16B) through a feeder path (7) and to control a flow rate of pressure oil flowing into a pair of load paths (6A, 6B) in an auxiliary manner, direction changing-over valve devices (100A; 101A; 102A; 103A; 105A; 106A; 107A; 108A; 110A; 111A; 112A; 113A; 114A) comprises: (a) seat valves (300, 301) provided in the feeder path, having a seat valve body (20) movably provided in a housing (1) and forming an auxiliary variable throttle (28) in the feeder path and a variable control throttle (33) formed on the seat valve body, for varying an opening area in response to a distance of move of the seat valve body; (b) pilot lines (24, 29 - 31, 35 - 37) for allowing communication between the upstream side (7C) of the auxiliary variable throttle of the feeder path and the downstream sides (7A, 7B) of the feeder path through the variable control throttle to determine a distance of move of the seat valve body by a flow rate of pressure oil flowing through the above-described lines; and (c) pilot flow rate control valves (400; 401; 403; 405; 406; 407; 408) each having a pilot variable throttle (45) in a pilot line and means for receiving flow rate control signals to be input (800, 52 - 59, 159, 54 - 59, 231A, 231B, 251, 252), for varying an opening area of the pilot variable throttle in response to input flow rate control signals to thereby control flow rates of pressure oil flowing through the pilot lines.
摘要翻译：一种具有阀芯型流量控制阀（200A，201A; 200; 204）的液压控制阀装置，其中为了控制从泵通路（5）供给到一对主可变节流阀通过馈送路径（7）进行控制，并且以辅助方式控制流入一对负载路径（6A，6B）的压力油的流量，方向转换阀装置（100A; 101A; 102A; 103A; 105A; 106A; 107A; 108A; 110A; 111A; 112A; 113A; 114A）包括：（a）设置在所述馈送路径中的座阀（300,301），具有座位阀体（20）壳体（1），并且在供给路径中形成辅助可变节流阀（28）和形成在座阀体上的可变控制节流阀（33），用于响应于座阀主体的移动距离改变开口面积; （b）用于允许馈送路径的辅助可变节流阀的上游侧（7C）与馈送通路的下游侧（7A，7B）之间的连通的先导管路（24,29,31,35-37），通过可变控制节气门，以通过流过上述管线的压力油的流量来确定座阀主体的移动距离; 和（c）在先导管路中各自具有先导可变节流阀（45）的先导流量控制阀（400; 401; 403; 405; 406; 407; 408）和用于接收要输入的流量控制信号的装置（800 ，52-59,159,54-59,231A，231B，251,252），用于响应于输入流量控制信号改变所述先导可变节流阀的开口面积，从而控制流过所述导向件的压力油流量线。

4. 发明申请

WO1992001163A1 HYDRAULIC DRIVE SYSTEM AND VALVE DEVICE 审中-公开
标题翻译：液压驱动系统和阀门装置
公开(公告)号：WO1992001163A1
公开(公告)日：1992-01-23
申请号：PCT/JP1991000903
申请日：1991-07-04
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , OCHIAI, Masami , KANAI, Takashi
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/16
CPC分类号： E02F9/2232 , E02F9/2296 , F15B11/163 , F15B11/165 , F15B13/0417 , F15B2211/20546 , F15B2211/30555 , F15B2211/31576 , F15B2211/6052
摘要： A hydraulic drive system wherein a plurality of direction change-over valves (38, 39) include pressure control valves (70, 71) which are respectively disposed between the first paths (44, 45) interconnectable to supply paths (42, 43) through variable restriction portions (52, 53:54, 55) and the second paths (50, 51) interconnectable to load paths (46, 47:48, 49); and control the pressures in the first paths. The pressure control valves include valve bodies (70a, 71a) which have first pressure receiving portions (72a, 73a) being operable in the valve opening direction and disposed in the first control chambers (74a, 75a) for receiving pressures in the first paths and second pressure receiving portions (72b, 73b) being operable in the valve closing direction and disposed in the second control chambers (74b, 75b) for receiving the maximum load pressure as the first control pressure; and third pressure receiving portions (72c, 73c) being operable in the valve closing direction and disposed in the third control chambers (74c, 75c) for receiving the second control pressures and fourth pressure receiving portions (72d, 73d) being operable in the valve opening direction and disposed in the fourth control chambers (74d, 75d) for receiving the third control pressures, respectively.

5. 发明申请

WO1994004828A1 HYDRAULIC DRIVE UNIT OF HYDRAULIC WORKING MACHINE 审中-公开
标题翻译：液压机械液压驱动装置
公开(公告)号：WO1994004828A1
公开(公告)日：1994-03-03
申请号：PCT/JP1993001188
申请日：1993-08-25
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HIRATA, Toichi , SUGIYAMA, Genroku , ISHIKAWA, Koji , OCHIAI, Masami
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/00
CPC分类号： B01D53/28 , B01D53/40 , B01D53/46 , E02F9/2235 , E02F9/2282 , E02F9/2296 , F15B11/055 , F15B11/165 , F15B21/087 , F15B2211/20553 , F15B2211/253 , F15B2211/30505 , F15B2211/3116 , F15B2211/351 , F15B2211/40507 , F15B2211/41554 , F15B2211/6058 , F15B2211/63 , F15B2211/6309 , F15B2211/6316 , F15B2211/6333 , F15B2211/6355 , F15B2211/6652 , F15B2211/7053 , F15B2211/71
摘要： A hydraulic drive unit of a hydraulic working machine comprising: a hydraulic pump (2) of a variable capacity; at least one actuator (3) driven by pressure oil discharged from said hydraulic pump; a center bypass type direction changeover valve (1) for controlling the flow of the pressure oil supplied from said hydraulic pump to the actuator; a center bypass line (20) for connecting the center bypass path of said direction changeover valve to a tank; a first signal generating means having a fixed throttle (4) provided on the center bypass line, for generating a first control signal for determining a first target capacity of said hydraulic pump by use of pressure generated by said fixed throttle; and a pump regulator (6) for controlling a displacement capacity of said hydraulic pump on the basis of the first control signal, which unit further comprises: a second signal generating means (32 - 26) for generating a second control signal for determining a second target capacity of said hydraulic pump; and a selecting means for selecting one control signal larger in target capacity out of the first and the second control signals as a third control signal to send it to said pump regulator (6). With this arrangement, satisfactory metering characteristics similar to those in the past can be obtained under a light load and satisfactory metering characteristics can be also obtained under a heavy load.
摘要翻译：一种液压工程机械的液压驱动装置，包括：具有可变容量的液压泵（2）; 由所述液压泵排出的压力油驱动的至少一个致动器（3）; 中心旁路式方向切换阀（1），用于控制从所述液压泵向致动器供给的压力油的流量; 用于将所述方向切换阀的中心旁路连接到罐的中心旁通管线（20）第一信号发生装置，具有设置在中心旁路管线上的固定节气门（4），用于通过使用由所述固定节流阀产生的压力产生用于确定所述液压泵的第一目标容量的第一控制信号; 以及泵调节器（6），用于根据第一控制信号控制所述液压泵的排量，该单元还包括：第二信号发生装置（32-26），用于产生用于确定第二控制信号的第二控制信号所述液压泵的目标容量; 以及选择装置，用于从第一和第二控制信号中选出一个目标容量较大的一个控制信号作为第三控制信号，以将其发送到所述泵调节器（6）。通过这种布置，可以在轻负载下获得与过去类似的令人满意的计量特性，并且在重负载下也可以获得令人满意的计量特性。

6. 发明申请

WO1993013271A1 HYDRAULIC DRIVING APPARATUS FOR CONSTRUCTION MACHINES 审中-公开
标题翻译：液压驱动装置
公开(公告)号：WO1993013271A1
公开(公告)日：1993-07-08
申请号：PCT/JP1992001676
申请日：1992-12-22
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HIRATA, Toichi , SUGIYAMA, Genroku , OCHIAI, Masami
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： E02F03/43
CPC分类号： E02F9/2239 , E02F9/2292
摘要： A hydraulic driving apparatus for construction machines, wherein a first flow rate control means has first and second flow rate control valves (11a, 11b), and first interlocking means (54, 55) for interlocking the first and second flow rate control valves with a first direction control means (7). The second flow rate control valve has third and fourth flow rate control valves (12a, 12b), and second interlocking means (56, 57) for interlocking the third and fourth flow rate control valves with a second direction control means (9). A first pressure control means has at least a first pressure control valve (13a) adapted to be operated in a closing direction in accordance with a pressure signal, while a second pressure control means has only a second pressure control valve (15b) adapted to be operated in a closing direction in accordance with a pressure signal. A first hydraulic pump (25a) is connected to a first actuator (19) via the first flow rate control valve (11a), first pressure control valve (13a) and first direction control means (7), while a second hydraulic pump (25b) is connected to the first actuator (19) via the second flow rate control valve (11b) and first direction control means (7). The first hydraulic pump (25a) is connected in parallel with first actuator (19) to a second actuator (21) via the third flow rate control valve (12a) and second direction control means (9) but not via the pressure control valve. The second hydraulic pump (25b) is connected in parallel with the first actuator (19) to the second actuator (21) via the fourth flow rate Control valve (12b), second pressure control valve (15b) and second direction control means (9).

7. 发明申请

WO1997003292A1 HYDRAULIC DRIVING DEVICE 审中-公开
标题翻译：液压驱动装置
公开(公告)号：WO1997003292A1
公开(公告)日：1997-01-30
申请号：PCT/JP1996001888
申请日：1996-07-08
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , KATO, Hideyo , OCHIAI, Masami
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/00
CPC分类号： F15B11/168 , E02F9/2225 , E02F9/2228 , E02F9/2285 , E02F9/2296 , F15B11/165 , F15B2211/20553 , F15B2211/255 , F15B2211/30555 , F15B2211/3111 , F15B2211/31576 , F15B2211/329 , F15B2211/351 , F15B2211/36 , F15B2211/40515 , F15B2211/41563 , F15B2211/428 , F15B2211/45 , F15B2211/50518 , F15B2211/5156 , F15B2211/56 , F15B2211/6052 , F15B2211/6316 , F15B2211/6346 , F15B2211/635 , F15B2211/6355 , F15B2211/7135
摘要： The pressure on an outlet side of a variable throttle portion (8a) of closed centre type directional selection valves (8A, 8B) is controlled by pressure regulating valves (9A, 9B) to be substantially equal to a maximum loaded pressure detected in a detection line (13), and a variable throttle valve (40) and a pressure regulating valve (41) are provided along a by-pass passageway (5) branched from a pump supply line (3) and the pressure on an outlet side of the variable throttle valve (40) is also controlled to be substantially equal to the maximum loaded pressure. The variable throttle valve (40) is controlled in such a manner that its opening area becomes smaller in accordance with the control input of an operation lever, and the pump discharge flow rate is controlled by a tilt-rotation control device (2n) in accordance to the control input of the tilt-rotation control device.
摘要翻译：闭合中心型方向选择阀（8A，8B）的可变节流部分（8a）的出口侧的压力由压力调节阀（9A，9B）控制为与检测中检测到的最大负载压力基本相等沿着从泵供给管线（3）分支出的旁路通路（5）和压力调节阀（41）的出口侧的压力设置有可变节流阀（40）和压力调节阀（41）可变节流阀（40）也被控制为基本上等于最大负载压力。根据操作杆的控制输入，可变节流阀（40）的开口面积减小，泵排出流量由倾斜旋转控制装置（2n）按照到倾斜旋转控制装置的控制输入。

8. 发明申请

WO1994013959A1 HYDRAULIC REGENERATOR 审中-公开
标题翻译：液压再生器
公开(公告)号：WO1994013959A1
公开(公告)日：1994-06-23
申请号：PCT/JP1993001763
申请日：1993-12-03
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HIRATA, Toichi , SUGIYAMA, Genroku , OCHIAI, Masami
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/02
CPC分类号： E02F9/2282 , E02F9/2217 , E02F9/2221 , E02F9/2296 , F15B11/024 , F15B2011/0243 , F15B2011/0246 , F15B2211/20546 , F15B2211/20576 , F15B2211/30505 , F15B2211/30525 , F15B2211/3058 , F15B2211/3116 , F15B2211/31576 , F15B2211/329 , F15B2211/6303 , F15B2211/6309 , F15B2211/6313 , F15B2211/6316 , F15B2211/6346 , F15B2211/6654 , F15B2211/6655 , F15B2211/67 , F15B2211/7053 , F15B2211/7058 , F15B2211/71 , F15B2211/75 , F15B2211/88
摘要： A hydraulic regenerator provided in a hydraulic driving unit which is provided with a plurality of actuators (4, 5) operated by a pressure oil supplied from a capacity-variable type hydraulic pump (1), and a plurality of direction change-over valves (2, 3) respectively provided between the hydraulic pump and actuators and adapted to control a flow of the pressure oil supplied to the corresponding actuators; and having variable resistance means (6, 60) provided in a first line (12), via which a tank port (23) of at least one direction change-over valve (2) out of the direction change-over valves and a tank (9) communicate with each other, and adapted to control the flow rate of the pressure oil flowing from a tank port to the tank in accordance with a control signal (Px), a third line (14) via which a portion on the upstream side of the variable resistance means in the first line and a second line (10C) connected to pump port (24) of the above-mentioned direction change-over valve communicate with each other, and a check valve (7) provided in the third line and allowing only a flow of the pressure oil running from the first line to the second line. This hydraulic regenerator is further provided with (a) means (101, 106, 102a, 102b, 103a, 103b) for detecting the quantities of state (Pd, Ph, Pia1, Pia2, Pib1, Pib2) associated with the operation of the above actuators, (b) control means (100, 100A-100H) receiving signals from the detecting means and generating on the basis of the preregistered relation driving signals (i, i*) corresponding to the above-mentioned quantities of state, and (c) a control signal generating means (105) adapted to receive the above-mentioned driving signals and generate the above-mentioned control signal (Px) in accordance with the same driving signals, and it is designed so as to enable the characteristics of the variable resistance means to be set arbitrarily, and sudden variation of a regeneration flow rate to be prevented.
摘要翻译：液压再生器设置在液压驱动单元中，该液压驱动单元设置有由从容量可变型液压泵（1）供应的压力油操作的多个致动器（4,5）和多个方向转换阀（分别设置在液压泵和致动器之间并且适于控制供应到相应致动器的压力油的流动; 并且具有设置在第一管线（12）中的可变阻力装置（6,60），通过所述第一管路将至少一个方向转换阀（2）的罐口（23）从所述方向转换阀和罐（9）彼此连通，并且适于根据控制信号（Px）控制从罐口流向罐的压力油的流量;第三管线（14），上游的一部分第一线中的可变电阻装置的侧面和与上述方向转换阀的泵口（24）连接的第二线路（10C）彼此连通，并且设置在第三线路中的止回阀（7）并且仅允许从第一线路运行到第二线路的压力油的流动。该液压再生器还设置有（a）用于检测与上述操作相关联的状态量（Pd，Ph，Pia1，Pia2，Pib1，Pib2）的装置（101,106,102a，102b，103a，103b）致动器，（b）从检测装置接收信号并基于与上述数量的状态相对应的预注册关系驱动信号（i，i *）产生的控制装置（100,100A-100H）和（c ）控制信号发生装置（105），其适于接收上述驱动信号并根据相同的驱动信号产生上述控制信号（Px），并且被设计成使得可变的特性电阻装置被任意设定，并且可防止再生流量的突然变化。

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