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1. 发明申请

WO1992004505A1 HYDRAULIC CONTROL SYSTEM IN CONSTRUCTION MACHINE 审中-公开
标题翻译：建筑机械液压控制系统
公开(公告)号：WO1992004505A1
公开(公告)日：1992-03-19
申请号：PCT/JP1991001204
申请日：1991-09-11
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , NAKAMURA, Kazunori , KAJITA, Yusuke , HIRATA, Toichi , SUGIYAMA, Genroku , ONOUE, Hiroshi , TANAKA, Hideaki , TOMIKAWA, Osamu , HAGA, Masakazu , WATANABE, Hiroshi
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： E02F03/43
CPC分类号： E02F9/2285 , E02F9/2232 , E02F9/2235 , E02F9/2296
摘要： In a controller (229) of a hydraulic control system in a construction machine, a valve control signal calculating function (301), when an operation pattern signal (A-1) of an actuator (201, 202...) is outputted, selects an output pattern from a plurality of output patterns of auxiliary valve control pressure stored in association with the operation pattern signal as a function of a signal of the difference between a discharge pressure of a pump and a maximum load pressure, calculates an auxiliary valve control pressure (Pc) corresponding to the differential signal based on this output pattern, selects a set of corresponding changing speeds (K...K...) from a plurality of sets of changing speeds of auxiliary valve control pressures stored in association with the operation pattern signal, and calculates valve control signals (S21-S26) by combining these auxiliary valve control pressures and changing speeds. A pump control signal calculating function (300), when the operation pattern signal (A-1) is outputted, selects corresponding sets of control gains (LSD, LSU) and of target differential pressures from a plurality of sets of control gains (LSD, LSU) and a plurality of sets of target differential pressures stored in association with the operation pattern signal (A-1), determines a deviation between a differential signal and its target differential pressure, and calculates pump control signals (S11, S12) for decreasing this deviation of differential pressure by use of this deviation of the differential pressure and the selected set of control gains (LSD, LSU), to thereby control a displacement of the hydraulic pump (220).

2. 发明申请

WO1990011413A1 HYDRAULIC DRIVE UNIT FOR CIVIL ENGINEERING AND CONSTRUCTION MACHINERY 审中-公开
标题翻译：民用工程及建筑机械液压驱动装置
公开(公告)号：WO1990011413A1
公开(公告)日：1990-10-04
申请号：PCT/JP1990000375
申请日：1990-03-20
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , TANAKA, Hideaki , HIRATA, Toichi , SUGIYAMA, Genroku , HAGA, Masakazu , KAJITA, Yusuke
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： E02F03/43
CPC分类号： E02F9/2235 , E02F9/2228 , E02F9/2285 , E02F9/2292 , E02F9/2296
摘要： A hydraulic drive unit provided with a hydraulic pump (11, 11A), a plurality of actuators (4-6) driven by a pressure oil supplied from the hydraulic pump, which include an arm cylinder (5) and a boom cylinder (4), a plurality of flow rate control valves (12, 14, 16) adapted to control the flows of the pressure oil supplied to these actuators, which include an arm direction control valve (14) and a boom direction control valve (12), and a plurality of divided flow compensating valves (13, 15, 17; 13A, 15A, 17A) adapted to control the pressure differences across these flow rate control valves and having driving means (13d, 15d, 17d; 13e, 13f, 15e, 15f, 17e, 17f) for setting target levels of pressure differences across the corresponding flow rate control valves. It is characterized in that it has a first means (21) for detecting an arm crowding action made by driving the arm cylinder (5), and second means (24, 30, 31; 24, 30A, 31) for controlling the driving means (15d, 15f) for the corresponding divided flow compensating valves (15; 15A) so that the target level of pressure difference across at least the flow rate control vale (14) related to the arm cylinder decrease when an arm crowding action is detected.

3. 发明申请

WO1990000683A1 HYDRAULIC DRIVING APPARATUS 审中-公开
标题翻译：液压驱动装置
公开(公告)号：WO1990000683A1
公开(公告)日：1990-01-25
申请号：PCT/JP1989000691
申请日：1989-07-07
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HIRATA, Toichi , SUGIYAMA, Genroku , KAJITA, Yusuke , AOYAGI, Yukio , YASUDA, Tomohiko , YASUDA, Gen , WATANABE, Hiroshi , IZUMI, Eiki , TANAKA, Yasuo , ONOUE, Hiroshi , NAKAMURA, Shigetaka
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/00
CPC分类号： F15B21/087 , E02F9/2228 , E02F9/2235 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F04B2205/05 , F04B2207/01 , F15B11/163 , F15B2211/20553 , F15B2211/25 , F15B2211/30535 , F15B2211/3111 , F15B2211/40515 , F15B2211/40569 , F15B2211/428 , F15B2211/455 , F15B2211/6052 , F15B2211/6309 , F15B2211/6313 , F15B2211/6355 , F15B2211/65 , F15B2211/6653 , F15B2211/6654 , F15B2211/71 , F15B2211/78
摘要： This invention relates to a hydraulic driving apparatus for construction machines which includes at least first and second hydraulic actuators (23-28) driven by a pressure oil supplied from a hydraulic pump (22), first and second flow rate control valves (29-34) for controlling the flow of the pressure oil supplied to these first and second actuators, respectively, and first and second branch flow compensation valves (35-40) for controlling first pressure differences (ΔPv1-Pv6) occurring between the inlets and outlets of the first and second flow rate control valves respectively. The first and second branch flow compensation valves apply control forces (Fc1-Fc6) based on second pressure differences to the corresponding branch flow compensation valves, respectively. The apparatus of the invention includes also driving means (45-50; 35c-40c) for setting a target value of the first pressure difference. The hydraulic driving apparatus includes further first means (59) for obtaining the second pressure difference (ΔP1s) from the discharge pressure (Ps) of the hydraulic pump (22) and the maximum load pressures (Pamax) of the first and second actuators, second means for calculating individual values (Fc1-Fc6) at least on the basis of the second pressure difference obtained by the first means as the values of the control force to be applied by the respective driving means (45-50; 35c-40c) of the first and second branch flow compensation valves (35-40) and first and second control pressure generation means (62a-62f) disposed so as to correspond to the first and second branch flow compensation valves, respectively, for generating the control pressures (Pc1-Pc6) in accordance with the individual values determined by the second means and outputting them to the driving means (35c-40c) of the first and second branch flow compensation valves, respectively.

4. 发明申请

WO1991005958A1 HYDRAULIC DRIVING APPARATUS OF CIVIL ENGINEERING/CONSTRUCTION EQUIPMENT 审中-公开
标题翻译：民用工程/建筑设备液压驱动装置
公开(公告)号：WO1991005958A1
公开(公告)日：1991-05-02
申请号：PCT/JP1990001310
申请日：1990-10-11
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HIRATA, Toichi , TANAKA, Hideaki , SUGIYAMA, Genroku , KAJITA, Yusuke , NAKAMURA, Kazunori
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/00
CPC分类号： F15B13/0417 , E02F9/2232 , E02F9/2296 , Y10T137/7858
摘要： This invention provides a hydraulic driving apparatus of civil engineering/construction equipment including a hydraulic pump (1), an actuator (2) driven by the pressure oil discharged from this hydraulic pump, a flow rate regulation valve (5) disposed between the hydraulic pump and the actuator, pressure compensation valves (8; 8A; 8B) equipped with a valve spool (23; 23A; 23B) for controlling the pressure difference (PZ - PLS) across this flow rate regulation valve and pump flow rate control means (9) for controlling the discharge flow rate of the hydraulic pump in accordance with the pressure difference (Pd - PLS)) between the pump pressure and the load pressure of the actuator, wherein the pressure compensation valves each include a first control chamber (30; 30A) into which the load pressure (PLS) of the actuator is introduced and which biases the valve spool in the valve opening direction by causing this load pressure to act on the first pressure receiving portion (28; 28A) of the valve spool, a second control chamber (29; 29A) into which the inlet pressure (PZ) of the flow rate regulation valve is introduced and which biases the valve spool in the valve closing direction by causing this inlet pressure to act on the second pressure receiving portion (27; 27A) of the valve spool and target pressure difference setting means (31; 50, 51; 31B, 51) for biasing the valve spool in the valve opening direction and setting the target value of the pressure difference across the flow rate regulation valve. In order to provide the actuator (2) with damping performance, the pressure receiving area (AZ) of the second pressure receiving portion (27; 27A) is made greater than the pressure receiving area (ALS) of the first pressure receiving portion (28; 28A).

5. 发明申请

WO1990008910A1 HYDRAULIC DRIVING RUNNING APPARATUS 审中-公开
标题翻译：液压驱动运行装置
公开(公告)号：WO1990008910A1
公开(公告)日：1990-08-09
申请号：PCT/JP1990000097
申请日：1990-01-26
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , TANAKA, Hideaki , HIRATA, Toichi , SUGIYAMA, Genroku , KAGIWADA, Hitoshi , YASUOKA, Tomohiko , WATANABE, Hiroshi , IZUMI, Eiki , ONOUE, Hiroshi
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F16H61/42
CPC分类号： E02F9/2235 , E02F9/2253 , E02F9/2296 , F16H61/4069 , F16H61/4148 , F16H61/421 , F16H61/425 , F16H61/435 , F16H61/46 , F16H61/47
摘要： This invention relates to a hydraulic driving running apparatus comprising a hydraulic pump (8, 8A), at least one variable capacity type hydraulic motor (1) driven by the pressure oil discharged from this hydraulic pump, a flow rate regulating valve (11) having a pressure compensation function for controlling the flow rate of the pressure oil supplied to the hydraulic motor in accordance with an operation quantity of an operation lever (11c), the regulation valve (11) being interposed between the hydraulic pump and the hydraulic motor, and a motor controller (13, 17) for switching the hydraulic motor between a first capacity and a second capacity which is smaller than the first capacity. The motor controller includes first means (600A) for detecting a value (Υr) related with a required running speed of the hydraulic motor and second means (601, 602, 603, 17) for controlling the hydraulic motor between the first capacity and the second capacity by use of the value described above.

6. 发明申请

WO1989008200A1 METHOD AND APPARATUS FOR DRIVING HYDRAULIC MACHINE 审中-公开
标题翻译：驱动液压机的方法与装置
公开(公告)号：WO1989008200A1
公开(公告)日：1989-09-08
申请号：PCT/JP1989000218
申请日：1989-03-02
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HIRATA, Toichi , YOSHIDA, Kuniaki , TANAKA, Hideaki , SUGIYAMA, Genroku , HAGA, Masakazu
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/04
CPC分类号： E02F9/2235 , F16H61/4061 , G05B2219/35392 , G05B2219/41302 , G05B2219/42241 , G05B2219/43203
摘要： This invention relates to a method and an apparatus for driving a hydraulic machine equipped with a plurality of hydraulic actuators such as hydraulic shovel, which can operate all of the hydraulic actuators with normal operation speed characteristics (first mode), can change the operation speed characteristics of at least part of the hydraulic actuator(s) among these hydraulic actuators to other characteristics (second mode) in accordance with the work requirements and can operate the part of the hydraulic actuator(s) with the operation speed characteristics of the second mode without affecting the operation speed characteristics of the other hydraulic actuators.

7. 发明申请

WO1991010833A1 VALVE DEVICE AND HYDRAULIC DRIVING DEVICE 审中-公开
标题翻译：阀门装置和液压驱动装置
公开(公告)号：WO1991010833A1
公开(公告)日：1991-07-25
申请号：PCT/JP1990001407
申请日：1990-11-01
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , SUGIYAMA, Genroku , HIRATA, Toichi , KAJITA, Yusuke
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/00
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.

8. 发明申请

WO1990002268A1 HYDRAULIC DRIVING APPARATUS 审中-公开
标题翻译：液压驱动装置
公开(公告)号：WO1990002268A1
公开(公告)日：1990-03-08
申请号：PCT/JP1989000893
申请日：1989-08-31
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , KAJITA, Yusuke , HIRATA, Toichi , SUGIYAMA, Genroku
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/05
CPC分类号： E02F9/2246 , E02F9/2228 , E02F9/2235 , E02F9/2292 , E02F9/2296
摘要： This invention relates to a hydraulic driving apparatus including a prime mover (21), a hydraulic pump (22) driven by the prime mover, a plurality of hydraulic actuators (23-28) driven by a pressure oil supplied from this hydraulic pump, flow rate control valves (29-34) for controlling the pressure oil supplied to these actuators and pressure compensation valves (35-40) for controlling the pressure differences of these flow rate control valves, whereby each pressure compensation valve is equipped with driving means (45-50, 35c-40c) for providing control force (f-Fc) in a valve opening direction for setting a target value of the pressure difference across each flow control valve. There are also provided first detection means (60) for detecting a target number of revolutions (No) of the prime mover (21) and control means (61, 62, 63) for controlling driving means (45-50, 35c-40c) in such a manner as to decrease the control force (f-Fc) with the decrease in the target number of revolutions at least on the basis of the target number of revolutions detected by the first detection means.
摘要翻译：所述液压驱动装置包括原动机（21），由原动机驱动的液压泵（22），多个由从发动机气门的液压泵输送的加压油驱动的液压致动器（23-28）。用于调节供给致动器的压力油的流量调节器（29-34）以及用于调节流量控制阀的压力差的压力补偿阀（35-40）。每个压力补偿阀设置有用于在阀打开方向上产生控制力（f-Fc）的驱动构件（45-50,35c-40c），以便建立值每个流量控制阀中的压差目标。还提供了用于检测原动机（21）的目标转数（No）的第一检测构件（60），以及用于调节致动器（21）的调节构件（61,62,63）当目标转数至少基于由第一感测元件检测到的目标转数时驱动（45-50,35c-40c）以降低控制力（f-Fc）。

9. 发明申请

WO1989011041A1 HYDRAULIC DRIVE UNIT FOR CONSTRUCTION MACHINERY 审中-公开
标题翻译：建筑机械液压驱动装置
公开(公告)号：WO1989011041A1
公开(公告)日：1989-11-16
申请号：PCT/JP1989000479
申请日：1989-05-10
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HIRATA, Toichi , SUGIYAMA, Genroku , KAJITA, Yusuke
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F15B11/05
CPC分类号： F15B21/087 , E02F9/2225 , E02F9/2232 , E02F9/2296 , F15B11/163 , F15B13/0417 , F15B2211/20553 , F15B2211/25 , F15B2211/30535 , F15B2211/3057 , F15B2211/3111 , F15B2211/329 , F15B2211/50527 , F15B2211/50536 , F15B2211/5157 , F15B2211/526 , F15B2211/55 , F15B2211/6054 , F15B2211/6313 , F15B2211/6654 , F15B2211/7058 , F15B2211/71
摘要： A hydraulic drive unit comprises a hydraulic pump (1), a plurality of hydraulic actuators (2, 3) driven by the hydraulic oil supplied from the hydraulic pump, a plurality of flow rate control valves (4, 5) for controlling the flow of the hydraulic oil, and a plurality of branch flow compensating valves (6, 7) for respectively controlling the differential pressure preceding or following each of the flow rate control valves, the plurality of actuators (2, 3) including a first actuator (2) whose load pressure tends to become relatively large and a second actuator (3) whose load pressure is smaller than that of the first actuator. Branch flow control means (22, 33) are provided to control the branch flow compensating valve (7) involved in controlling the second actuator in such a manner that, while the first and second actuators (2, 3) are being driven on a multiplicable basis, the preceding and following pressure (Pz2-P12) of the flow rate control valve (5) involved in the second actuator (3) is made greater than the pressure (Pz1-P11) thereof.

10. 发明申请

WO1989008213A1 VALVE DEVICE 审中-公开
标题翻译：阀门设备
公开(公告)号：WO1989008213A1
公开(公告)日：1989-09-08
申请号：PCT/JP1989000184
申请日：1989-02-23
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , SUGIYAMA, Genroku , HIRATA, Toichi , TANAKA, Hideaki , YUASA, Kazumasa , NOZAWA, Yusaku
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F16K17/04
CPC分类号： F15B13/0405 , F16K15/18
摘要： An actuator control valve (6) is fitted on a hydraulic machine having a hydraulic pump (1) and a hydraulic actuator (2) driven by a pressure oil discharged from this hydraulic pump. This valve device has a meter-in circuit (4) adapted to introduce the pressure oil discharged from the hydraulic pump into the actuator, and a meter-out circuit (5) adapted to introduce a return oil from the actuator into a tank (3). The meter-out circuit is provided with pilot circuits (24a, 24b) including a main valve (22) for controlling the return oil from the actuator, and a variable throttle means (23), which main valve is adapted to be closed when the pilot circuits are closed, and to vary the degree of opening of itself in accordance with the throttling rate of the variable throttle means, and control means (27-31) adapted to vary the throttling rate of the variable throttle means in accordance with the driving pressure of the actuator.
摘要翻译：执行器控制阀（6）安装在具有液压泵（1）和由从该液压泵排出的压力油驱动的液压致动器（2）的液压机上。该阀装置具有适于将从液压泵排出的压力油引入致动器的计量回路（4），以及用于将来自致动器的回油引入罐（3）中的出口回路（5））。出口电路设置有包括用于控制来自致动器的返回油的主阀（22）和可变节流装置（23）的先导电路（24a，24b），该主阀适于在先导电路关闭，并且根据可变节流装置的节流率来改变其自身的开度;以及控制装置（27-31），其适于根据驾驶改变可变节流装置的节流速度执行机构的压力。

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