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1. 发明公开

EP0425684A4 VALVE DEVICE AND HYDRAULIC DRIVING APPARATUS 失效
标题翻译：阀门装置和液压驱动装置
公开(公告)号：EP0425684A4
公开(公告)日：1991-08-21
申请号：EP90904937
申请日：1990-03-23
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： HIRATA, TOICHI , SUGIYAMA, GENROKU
IPC分类号： F15B13/00 , F15B13/06 , F15B13/08 , F16K11/07
CPC分类号： F15B13/0842 , F15B13/06 , Y10T137/87185

2. 发明公开

EP0366815A4 HYDRAULIC DRIVE UNIT FOR CONSTRUCTION MACHINERY 失效
标题翻译：建筑机械液压驱动装置
公开(公告)号：EP0366815A4
公开(公告)日：1990-09-26
申请号：EP89905762
申请日：1989-05-10
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： HIRATA, TOICHI , SUGIYAMA, GENROKU , KAJITA, YUSUKE KAWARABA-APARTMENT 101
IPC分类号： E02F9/22 , F15B11/16 , F15B13/04 , F15B21/08 , 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.

3. 发明公开

EP0362402A4 METHOD AND APPARATUS FOR DRIVING HYDRAULIC MACHINE 失效
标题翻译：驱动液压机的方法与装置
公开(公告)号：EP0362402A4
公开(公告)日：1993-09-29
申请号：EP89903244
申请日：1989-03-02
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： HIRATA, TOICHI , YOSHIDA, KUNIAKI , TANAKA, HIDEAKI , SUGIYAMA, GENROKU , HAGA, MASAKAZU
IPC分类号： E02F9/22 , F15B11/04 , F15B11/16
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.

4. 发明公开

EP0427865A4 HYDRAULIC DRIVING DEVICE OF CONSTRUCTION EQUIPMENT 失效
标题翻译：建筑设备液压驱动装置
公开(公告)号：EP0427865A4
公开(公告)日：1992-03-04
申请号：EP90907385
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： E02F9/22 , F15B13/04 , F15B11/05 , F15B11/00
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.

5. 发明公开

EP0354972A4 VALVE DEVICE 失效
标题翻译：阀门设备
公开(公告)号：EP0354972A4
公开(公告)日：1990-09-19
申请号：EP89902812
申请日：1989-02-23
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： SUGIYAMA, GENROKU , HIRATA, TOICHI , TANAKA, HIDEAKI , YUASA, KAZUMASA , NOZAWA, YUSAKU
IPC分类号： F15B13/04 , F16K15/18 , F16K17/04 , F15B11/02
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.

6. 发明公开

EP0477370A4 VALVE DEVICE AND HYDRAULIC DRIVING DEVICE 有权
标题翻译：阀门装置和液压驱动装置
公开(公告)号：EP0477370A4
公开(公告)日：1993-05-26
申请号：EP90916057
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： E02F9/22 , F15B13/04 , 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.

7. 发明公开

EP0503073A4 HYDRAULIC CONTROL SYSTEM IN CONSTRUCTION MACHINE 有权
标题翻译：施工机械液压控制系统
公开(公告)号：EP0503073A4
公开(公告)日：1993-04-14
申请号：EP91915982
申请日：1991-09-11
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： NAKAMURA, KAZUNORI , KAJITA, YUSUKE , HIRATA, TOICHI , SUGIYAMA, GENROKU , ONOUE, HIROSHI , TANAKA, HIDEAKI , TOMIKAWA, OSAMU , HAGA, MASAKAZU , WATANABE, HIROSHI
IPC分类号： E02F9/22 , E02F3/43 , E02F9/20
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).
摘要翻译：在施工机械的液压控制系统的控制器（229）中，当输出致动器（201,202 ...）的操作模式信号（AI）时，阀控制信号计算功能（301）选择一个与作为泵的排出压力和最大负载压力之间的差的信号的函数的与操作模式信号相关联地存储的辅助阀控制压力的多个输出模式的输出模式计算辅助阀控制压力 Pc）基于该输出模式对应于差分信号，从与操作模式相关联地存储的辅助阀控制压力的多组变速组中选择一组相应的变化速度（K ... K ...）信号，并通过组合这些辅助阀控制压力和变化速度来计算阀控制信号（S21-S26）。当输出操作模式信号（AI）时，泵控制信号计算功能（300）从多组控制增益（LSD，LSU）中选择相应的一组控制增益（LSD，LSU）和目标压差，和与操作模式信号（AI）相关联地存储的多组目标压差，确定差分信号与其目标压差之间的偏差，并且计算用于减小差分偏差的泵控制信号（S11，S12）通过使用差压的偏差和所选择的一组控制增益（LSD，LSU）来施加压力，从而控制液压泵（220）的位移。

8. 发明公开

EP0411151A4 HYDRAULIC CIRCUIT FOR WORKING MACHINES 失效
标题翻译：液压电路用于工作机械
公开(公告)号：EP0411151A4
公开(公告)日：1992-03-11
申请号：EP90903218
申请日：1990-02-19
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： SUGIYAMA, GENROKU , HIRATA, TOICHI
IPC分类号： E02F9/22 , F15B11/16 , F15B11/00
CPC分类号： E02F9/2296 , E02F9/2221 , E02F9/2232 , E02F9/2282 , E02F9/2285 , E02F9/2292 , F15B11/163 , F15B11/168 , F15B2211/20553 , F15B2211/25 , F15B2211/30535 , F15B2211/30555 , F15B2211/3111 , F15B2211/329 , F15B2211/50518 , F15B2211/5159 , F15B2211/55 , F15B2211/6054 , F15B2211/71 , F15B2211/78
摘要： This invention relates to a hydraulic circuit for working machines, provided with a hydraulic fluid source (1), at least one hydraulic actuator (3 or 13) adapted to be driven by the hydraulic fluid supplied from the hydraulic fluid source, flow rate control valves (4; 4A or 14; 14A) adapted to control a flow of the hydraulic fluid supplied to the actuator, and pressure control means (5; 5A or 15; 15A) for maintaining the pressure differences across the flow rate control valves on predetermined levels. The apparatus according to this invention has a first means (20; 23; 35, 36) for selectively producing one of a pressure equal to a load pressure and an intermediate pressure higher than the load pressure but lower than a supply pressure, on the basis of a load pressure on the actuator (3 or 13) and a supply pressure in the hydraulic fluid source (1), and outputting the resultant pressure as a control pressure; a second means (21; 27; 29; 34, 36) for operating the first means to specify a pressure to be selected as a control pressure, i.e. one of the pressure equal to the load pressure and the intermediate pressure; and a communication means (22) for introducing the control pressure to the pressure control means (5; 5A or 15; 15A). The pressure control means is adapted to maintain the above-mentioned pressure difference on the above-mentioned predetermined level when the control pressure is equal to the load pressure, and set the pressure difference to one lower than the predetermined level when the control pressure is the intermediate pressure.

9. 发明公开

EP0379595A4 HYDRAULIC DRIVING APPARATUS 失效
标题翻译：液压驱动装置
公开(公告)号：EP0379595A4
公开(公告)日：1990-12-05
申请号：EP89908279
申请日：1989-07-07
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： HIRATA, TOICHI , SUGIYAMA, GENROKU , KAJITA, YUSUKE,KAWARABA-APARTMENT 101 , AOYAGI, YUKIO,2425-6, OAZA SHIMOINAYOSHI , YASUDA, TOMOHIKO , YASUDA, GEN,TSUKUBA-RYO,2625, OAZA SIMOINAYOSHI , WATANABE, HIROSHI , IZUMI, EIKI,2613-343, OAZA SHIMOINAYOSHI , TANAKA, YASUO , ONOUE, HIROSHI,TSUKUBA-RYO , NAKAMURA, SHIGETAKA
IPC分类号： E02F9/22 , F15B11/16 , F15B21/08 , F15B11/00 , F15B11/05
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.

10. 发明公开

EP0362409A4 HYDRAULIC DRIVING UNIT 失效
标题翻译：液压驱动单元
公开(公告)号：EP0362409A4
公开(公告)日：1990-10-03
申请号：EP89903799
申请日：1989-03-22
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： HIRATA, TOICHI , TANAKA, HIDEAKI , SUGIYAMA, GENROKU , NOZAWA, YUSAKU
IPC分类号： E02F9/22 , F15B11/16 , F15B13/04 , F15B11/00
CPC分类号： F15B11/165 , E02F9/2225 , E02F9/2232 , E02F9/2296 , F15B11/163 , F15B13/0417 , F15B2211/20553 , F15B2211/253 , F15B2211/30505 , F15B2211/30535 , F15B2211/3055 , F15B2211/3111 , F15B2211/324 , F15B2211/351 , F15B2211/353 , F15B2211/6051 , F15B2211/6054 , F15B2211/7053 , F15B2211/7135 , Y10T137/87193
摘要： A hydraulic driving unit having at least one hydraulic pump (1), a plurality of hydraulic actuators (2, 3) adapted to be driven by the pressure oil discharged from the hydraulic pump, tanks (4) into which the return oil from the hydraulic actuators is discharged, flow rate control valve means (14, 18) provided in the hydraulic actuators and including first main variable throttle means (23A, 23B) for controlling the flow rate of the pressure oil supplied from the hydraulic pump to the hydraulic actuators, and second main variable throttle means (24A, 24B) for controlling the flow rate of the return oil discharged from the hydraulic actuators to the tanks, a pump control means (22) for controlling the discharge rate of the hydraulic pump normally in response to a difference between the discharge pressure of the hydraulic pump and a maximum load pressure of the hydraulic actuators so that the discharge pressure of the pump becomes higher than the maximum load pressure by a certain quantity, and first pressure compensation control means (15, 19) adapted to be operated with a value, which is determined by the difference between the discharge pressure of the pump and the maximum load pressure, as a target compensation differential pressure and control the pressure compensation of the first main variable throttle means in the flow rate control valve means, wherein the hydraulic driving unit further includes second pressure compensation control means (16, 20) adapted to be operated with a value, which is determined by a longitudinal differential pressure of the first main variable throttle means (23A, 23B), as a target compensation differential pressure and control the second main variable throttle means (24A, 24B) in the flow rate control valve means (14, 18).

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