WO2004085855A1 - 液圧装置 - Google Patents
液圧装置 Download PDFInfo
- Publication number
- WO2004085855A1 WO2004085855A1 PCT/JP2004/002657 JP2004002657W WO2004085855A1 WO 2004085855 A1 WO2004085855 A1 WO 2004085855A1 JP 2004002657 W JP2004002657 W JP 2004002657W WO 2004085855 A1 WO2004085855 A1 WO 2004085855A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydraulic
- pressure
- electric motor
- flow path
- control circuit
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/082—Servomotor systems incorporating electrically operated control means with different modes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
- F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
- F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
- F15B9/09—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor with electrical control means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20561—Type of pump reversible
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
- F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6658—Control using different modes, e.g. four-quadrant-operation, working mode and transportation mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/76—Control of force or torque of the output member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/765—Control of position or angle of the output member
Definitions
- the present invention relates to a hydraulic device in which both ports of a hydraulic pump driven by an electric motor and rotatable in both directions and both ports of a hydraulic actuator are connected via a pair of flow paths, respectively.
- both ports of a hydraulic pump driven by an electric motor and rotatable in both directions are connected to a liquid.
- a hydraulic device is known in which both ports of a pressure chamber are connected to each other via a pair of flow paths.
- the operating direction of the hydraulic actuator is switched by switching the rotation direction of the electric motor.
- the rotation speed of the electric motor is controlled, the driving speed of the hydraulic actuator is controlled, and the stop position of the hydraulic actuator is controlled. And so on.
- An object of the present invention is to provide a hydraulic device capable of performing stable pressing. Disclosure of the invention
- the present invention has taken the following means to solve the object. That is,
- a hydraulic pump driven by an electric motor and rotatable in both directions; connecting both ports of the hydraulic pump and both ports of the hydraulic pump via a pair of flow paths, respectively, In a hydraulic device that is pressed against the fixed side by driving overnight,
- a throttle is interposed in a leak flow path that communicates a high-pressure side flow path of the pair of flow paths to a low-pressure side. That is it.
- a position control means for controlling the electric motor based on a position detected by a movement detection sensor for detecting movement by the hydraulic pressure actuator
- Pressure control means for controlling the electric motor based on a pressure detected by a pressure sensor for detecting a pressure of the high-pressure side flow path
- a switching means for switching the control of the electric motor by the position control means to the control by the pressure control means may be provided.
- the switching means may switch control of the electric motor by the position control means to control by the pressure control means based on detection by the movement detection sensor.
- the hydraulic actuator may be either a single rod type hydraulic cylinder, a double rod type hydraulic cylinder, or a hydraulic motor, and the hydraulic pump is a piston pump. Is also good.
- the Lee An electromagnetic on-off valve may be interposed in the flow passage.
- FIG. 1 is a circuit diagram of a hydraulic device as one embodiment of the present invention
- FIG. 2 is a graph showing a pressure change in a conventional control in which driving and stopping of an electric motor are repeated.
- reference numeral 1 denotes a hydraulic pump, which is a swash plate type piston pump that can rotate in both directions.
- hydraulic pump When the pump is rotated forward, hydraulic fluid is sucked from the first port 2 side and the second port is pumped. The hydraulic fluid is discharged to the fourth port, and when it is rotated in the reverse direction, the hydraulic fluid is sucked from the second port 4 and discharged from the first port 2.
- the hydraulic pump is connected so as to be rotationally driven by an electric motor 6 such as a saponomo.
- the first port 2 and the second port 4 are connected to a rod-side flow path 8 and a head-side flow path 10, respectively.
- the rod side flow path 8 is connected to the rod side port 14 of the single rod type hydraulic cylinder 12, and the head side flow path 10 is connected to the head side port of the hydraulic cylinder 12. It is connected to U16. It is to be noted that the present invention is not limited to the single rod type hydraulic cylinders 12 and may be a double rod type hydraulic cylinder or a hydraulic motor, and can be implemented as long as the hydraulic actuator is used.
- a low pressure side tank 18 is connected to the inlet side flow path 8 via a pilot check valve 20, and the pilot check valve 20 flows out of the tank 18 to the rod side flow path 8. Is provided in a direction that allows The pilot check valve 20 introduces the hydraulic pressure in the head side flow path 10 as the pilot pressure, and opens when the hydraulic pressure in the head side flow path 10 rises, and the rod is opened. Sidestream The road 8 and the tank 18 are connected so as to communicate with each other.
- the head side flow path 10 is connected to the tank 18 via a pilot check valve 22, and the pilot check valve 22 is connected from the tank 18 to the head side flow path 10. It is provided in a direction that allows outflow.
- the pilot check valve 22 introduces the fluid pressure in the rod-side flow path 8 as pilot pressure, and opens when the fluid pressure in the rod-side flow path 8 rises to open the head-side flow path 10. It is connected so that it communicates with evening 18.
- the hydraulic cylinder 12 is configured to move the transported object 26 via the rod 24, and the moved transported object 26 is fixed to a fixed side such as a wall 28. It is configured to press.
- the fixed side is not limited to a wall, but may be a configuration in which the rod 24 is pressed against a not-shown stall as the fixed side.
- a leak channel 30 communicating with the tank 18 is connected to the head-side channel 10.
- the leak passage 30 is provided with an electromagnetic on-off valve 31 and a variable throttle 32.
- the rod 24 is protruded and pressed against the fixed side.
- a leak passage 30, a solenoid on-off valve 31, and a variable throttle 32 may be provided in the mouth-side passage 8.
- a movement detection sensor 34 for detecting the movement of the transferred object 26 by the hydraulic cylinder 12 is provided, and the movement detection sensor 34 outputs a movement position signal corresponding to the movement of the transferred object 26. Output.
- a pressure sensor 36 is provided in the head-side flow path 10, and the pressure sensor 36 detects the pressure of the pressurized liquid in the head-side flow path 10 and outputs a pressure signal.
- the movement detection sensor 34 is connected to the position control circuit 38 and has a pressure sensor.
- the sensor 36 is connected to the pressure control circuit 40.
- the position control circuit 38 and the pressure control circuit 40 are connected to the electric motor 6 via the switching circuit 42. These circuits may be configured by hardware or software.
- the position control circuit 38 is configured to control the electric motor 6 based on the movement position signal from the movement detection sensor 34 to move the transfer target 26 to a preset movement position. I have.
- the pressure control circuit 40 is configured to control the electric motor 6 such that the pressure of the hydraulic fluid in the head-side flow path 10 detected by the pressure sensor 36 becomes a predetermined specified pressure. Have been. That is, by rotating the electric motor 6 forward, the hydraulic fluid is discharged from the hydraulic pump 1 to the head side flow path 10 so that the pressure of the pressure liquid in the head side flow path 10 becomes the specified pressure. Control.
- the switching circuit 42 switches between controlling the electric motor 6 with a signal from the position control circuit 38 and controlling the electric motor 6 with a signal from the pressure control circuit 40. For example, when the movement position of the transported object 26 detected by the movement detection sensor 34 becomes a state of being pressed against the wall 28, the control by the position control circuit 38 and the pressure control circuit It is configured to switch to control by 40.
- the difference between the amount of hydraulic fluid discharged from the head-side port 16 and the amount of hydraulic fluid flowing from the rod-side port 14 corresponds to the volume of the rod 24. Occurs.
- the excess hydraulic fluid is discharged from the rod-side flow path 8 to the tank 18 from the head-side flow path 10 by opening the pie-mouth check valve 22 by the action of the pie-port pressure. You.
- the hydraulic cylinder 12 is of a double-head type, there is no need to provide the pilot check valves 20 and 22.
- the electric motor 6 When the electric motor 6 is connected to the position control circuit 38 by the switching circuit 42, the transferred object 26 is moved by the movement detecting sensor 34 so as to move to a preset position.
- the rotation position of the electric motor 6 is controlled such that the moving position of the motor 6 is detected and the moving speed of the transported object 26 becomes a preset speed.
- the pressure control circuit 40 is controlled by the switching circuit 42. And electric motor 6 to be connected.
- the switching of the connection by the switching circuit 42 is performed based on the movement position of the transported object 26 detected by the movement detection sensor 34 or the pressure detected by the pressure sensor 36 is set to a predetermined value. Perform when the value exceeds It is good to do.
- the pressure control circuit 40 controls the electric motor 6 based on the pressure of the hydraulic fluid in the head-side flow path 10 detected by the pressure sensor 36.
- an excitation signal is output to the electromagnetic opening / closing valve 31 to open the electromagnetic opening / closing valve 31.
- the pressurized liquid returns from the leak flow path 30 to the tank 18 via the electromagnetic on-off valve 31 and the variable throttle valve 32.
- the pressure control circuit 40 controls the rotation of the electric motor 6 so that the pressure detected by the pressure sensor 36 becomes a preset specified pressure. If the amount of hydraulic fluid discharged from hydraulic pump 1 is larger than the amount of hydraulic fluid due to internal leak of hydraulic pump 1 or the amount of hydraulic fluid returning from leak channel 30 to tank 18, the head The pressure in the side channel 10 increases. On the other hand, if the discharge amount is small, the pressure in the head-side flow path 10 decreases. Therefore, the pressure in the head-side flow path 10 can be controlled even when the pressurized liquid is returned from the leak flow path 30 to the tank 18.
- a torque at least equal to the sum of the reverse rotation torque caused by the pressure of the head side flow path 10 and the friction torque when driving the hydraulic pump 1 is required.
- the electric motor 6 is driven with a torque slightly larger than this torque to discharge the hydraulic fluid from the hydraulic pump 1. Then, by adjusting the opening degree of the variable throttle 32 to return the excess pressure fluid to the tank 18 and constantly rotating the electric motor 6 at a low speed, the head side flow path 1 The pressure in 0 is controlled to the specified pressure. Further, since the electric motor 6 keeps rotating at all times, there is no control to repeat the rotation and stop of the electric motor 6.
- the opening degree of the variable throttle 32 may be set by experiments or the like. If the opening degree is determined in advance, it can be implemented even with a fixed throttle.
- the solenoid on-off valve 31 may be provided as needed, and without the solenoid on-off valve 31, regardless of the switching of the switching circuit 42, the tank is always tanned from the leak passage 30.
- the present invention is also applicable to a configuration in which the pressurized liquid leaks to the pump 18.
- the present invention is not limited to such embodiments at all, and can be implemented in various modes without departing from the gist of the present invention.
- the hydraulic device of the present invention returns the hydraulic fluid in the high-pressure side flow path from the leak flow path to the low-pressure side through the throttle while pressing the hydraulic pressure apparatus. Since the control in which the driving and the stopping of the motor are not repeated is not performed, there is an effect that stable pressing can be performed. Industrial applicability
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04716710A EP1600641A4 (en) | 2003-03-03 | 2004-03-03 | HYDRAULIC DEVICE |
US10/520,890 US20050200195A1 (en) | 2003-03-03 | 2004-03-03 | Hydraulic device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003056259A JP2004263645A (ja) | 2003-03-03 | 2003-03-03 | 液圧装置 |
JP2003-056259 | 2003-03-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004085855A1 true WO2004085855A1 (ja) | 2004-10-07 |
Family
ID=33094801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/002657 WO2004085855A1 (ja) | 2003-03-03 | 2004-03-03 | 液圧装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050200195A1 (ja) |
EP (1) | EP1600641A4 (ja) |
JP (1) | JP2004263645A (ja) |
KR (1) | KR20050105970A (ja) |
WO (1) | WO2004085855A1 (ja) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100790364B1 (ko) * | 2006-07-04 | 2008-01-02 | 울산대학교 산학협력단 | 전기유압식 능동형 부하 시뮬레이터 장치 |
JP4837477B2 (ja) * | 2006-07-31 | 2011-12-14 | 株式会社青木固研究所 | 射出装置の油圧回路及び背圧制御方法 |
JP4823832B2 (ja) * | 2006-09-20 | 2011-11-24 | 住友重機械工業株式会社 | 型締装置及び型締装置の制御方法 |
DE102009025707B4 (de) * | 2009-06-20 | 2021-06-02 | Robert Bosch Gmbh | Vorrichtung zur Steuerung einer Anlage mit Hydraulikkreisen |
EP2316639B1 (de) * | 2009-10-27 | 2015-12-02 | Hermann Schwelling | Verfahren und Einrichtung zur Regelung des Antriebes von Ballenpressen |
CN101793275B (zh) * | 2010-03-30 | 2015-01-07 | 宁波安信数控技术有限公司 | 高精度液压伺服控制系统 |
TWI590631B (zh) * | 2012-03-15 | 2017-07-01 | 微軟技術授權有限責任公司 | 無線網路上的多模態通信優先性 |
CN105201940A (zh) * | 2015-10-22 | 2015-12-30 | 太原科技大学 | 一种基于单边压力反馈的新型液压直驱系统 |
JP6511010B2 (ja) | 2016-05-11 | 2019-05-08 | 川崎重工業株式会社 | アクチュエータ装置および制御方法 |
US12117024B2 (en) * | 2017-05-31 | 2024-10-15 | ClearMotion, Inc. | Pilot operated blow-off valves for hydraulic actuators |
CN115324952B (zh) * | 2022-08-12 | 2023-07-04 | 山东兖矿智能制造有限公司 | 一种阀体检测液压系统及阀体检测试验装置 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4041704A (en) * | 1975-06-18 | 1977-08-16 | Haemmerle, A. G. Maschinenfabrik | Stop mechanism for a bending press, plate shear or the like machines |
JPS5416634B2 (ja) * | 1971-12-25 | 1979-06-23 | ||
JPS58102807A (ja) * | 1981-12-05 | 1983-06-18 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | 電気−液圧操作駆動装置 |
JPH1026101A (ja) | 1996-07-10 | 1998-01-27 | Opton Co Ltd | 液圧装置 |
JPH10331803A (ja) * | 1997-05-30 | 1998-12-15 | Nkk Corp | 油圧駆動装置及び同装置を使用したフラッシュ溶接機 |
JPH11156412A (ja) * | 1997-12-01 | 1999-06-15 | Nkk Corp | 液圧圧下式圧延機 |
JP2000264034A (ja) * | 1999-03-19 | 2000-09-26 | Kayaba Ind Co Ltd | アクティブサスペンションの制御装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3877347A (en) * | 1973-03-13 | 1975-04-15 | Res Engineering Company | Hydraulic control |
JPS5416634A (en) * | 1977-07-08 | 1979-02-07 | Nippon Telegraph & Telephone | Circuit for charging battery |
US4667472A (en) * | 1984-12-28 | 1987-05-26 | The Boeing Company | Electric integrated actuator with variable gain hydraulic output |
DE3600364A1 (de) * | 1986-01-09 | 1987-07-16 | Rexroth Mannesmann Gmbh | Verfahren und vorrichtung zum ausgleich des auf einen hydraulischen antrieb wirkenden veraenderlichen gewichtes einer masse, insbesondere fuer den senkrecht stehenden antriebszylinder einer laeppmaschine |
JPS6323002A (ja) * | 1986-07-16 | 1988-01-30 | Daiichi Denki Kk | 油圧パワ−サ−ボシステム |
DE3734329A1 (de) * | 1987-10-10 | 1989-04-20 | Bosch Gmbh Robert | Hydraulische steuereinrichtung fuer eine presse |
JPH0238020A (ja) * | 1988-07-29 | 1990-02-07 | Hiroshi Sato | プラスチック成形機の電気的液圧制御装置と方法 |
US5410842A (en) * | 1993-11-12 | 1995-05-02 | Asi Technologies, Inc. | Two speed hydraulic door operator |
EP0665381B1 (de) * | 1994-01-28 | 1998-09-02 | PAUL PLEIGER Maschinenfabrik GmbH & Co. KG | Vorrichtung zum Betreiben von hydraulisch betätigten Armaturen |
JP3248821B2 (ja) * | 1994-11-18 | 2002-01-21 | 敏男 福田 | アクチュエータの作動方法及び装置 |
JP3967394B2 (ja) * | 1995-10-31 | 2007-08-29 | 石川島播磨重工業株式会社 | ワークの組立方法及びその装置 |
JP3833291B2 (ja) * | 1995-12-22 | 2006-10-11 | 豊興工業株式会社 | 液圧作動加圧加工装置 |
AT410010B (de) * | 2001-01-29 | 2003-01-27 | Hoerbiger Hydraulik | Hydraulische betätigungsanordnung und hydraulisch sperrbares rückschlagventil |
-
2003
- 2003-03-03 JP JP2003056259A patent/JP2004263645A/ja active Pending
-
2004
- 2004-03-03 US US10/520,890 patent/US20050200195A1/en not_active Abandoned
- 2004-03-03 KR KR1020057001345A patent/KR20050105970A/ko not_active Application Discontinuation
- 2004-03-03 WO PCT/JP2004/002657 patent/WO2004085855A1/ja active Application Filing
- 2004-03-03 EP EP04716710A patent/EP1600641A4/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5416634B2 (ja) * | 1971-12-25 | 1979-06-23 | ||
US4041704A (en) * | 1975-06-18 | 1977-08-16 | Haemmerle, A. G. Maschinenfabrik | Stop mechanism for a bending press, plate shear or the like machines |
JPS58102807A (ja) * | 1981-12-05 | 1983-06-18 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | 電気−液圧操作駆動装置 |
JPH1026101A (ja) | 1996-07-10 | 1998-01-27 | Opton Co Ltd | 液圧装置 |
JPH10331803A (ja) * | 1997-05-30 | 1998-12-15 | Nkk Corp | 油圧駆動装置及び同装置を使用したフラッシュ溶接機 |
JPH11156412A (ja) * | 1997-12-01 | 1999-06-15 | Nkk Corp | 液圧圧下式圧延機 |
JP2000264034A (ja) * | 1999-03-19 | 2000-09-26 | Kayaba Ind Co Ltd | アクティブサスペンションの制御装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1600641A4 * |
Also Published As
Publication number | Publication date |
---|---|
JP2004263645A (ja) | 2004-09-24 |
EP1600641A1 (en) | 2005-11-30 |
KR20050105970A (ko) | 2005-11-08 |
US20050200195A1 (en) | 2005-09-15 |
EP1600641A4 (en) | 2007-04-04 |
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