EP1780420B1 - Hydraulische Druckversorgungseinheit und elektrohydraulische Arbeitseinheit - Google Patents

Hydraulische Druckversorgungseinheit und elektrohydraulische Arbeitseinheit Download PDF

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Publication number
EP1780420B1
EP1780420B1 EP06122576A EP06122576A EP1780420B1 EP 1780420 B1 EP1780420 B1 EP 1780420B1 EP 06122576 A EP06122576 A EP 06122576A EP 06122576 A EP06122576 A EP 06122576A EP 1780420 B1 EP1780420 B1 EP 1780420B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pump
supply unit
working
pumps
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP06122576A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1780420A2 (de
EP1780420A3 (de
Inventor
Manfred Kurz
Bertold Grimmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoerbiger Automatisierungstechnik Holding GmbH
Original Assignee
Hoerbiger Automatisierungstechnik Holding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoerbiger Automatisierungstechnik Holding GmbH filed Critical Hoerbiger Automatisierungstechnik Holding GmbH
Publication of EP1780420A2 publication Critical patent/EP1780420A2/de
Publication of EP1780420A3 publication Critical patent/EP1780420A3/de
Application granted granted Critical
Publication of EP1780420B1 publication Critical patent/EP1780420B1/de
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • 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
    • F15B11/022—Systems essentially incorporating special features for controlling the speed or actuating force of an output member in which a rapid approach stroke is followed by a slower, high-force working stroke
    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • 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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/001—With multiple inputs, e.g. for dual control
    • 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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/005—With rotary or crank input
    • F15B7/006—Rotary pump input
    • 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
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • 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
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20592—Combinations of pumps for supplying high and low 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/265—Control of multiple pressure sources
    • F15B2211/2654—Control of multiple pressure sources one or more pressure sources having priority
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-check valves
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid 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
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/575—Pilot pressure control
    • F15B2211/5756—Pilot pressure control for opening a valve
    • 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
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/775—Combined control, e.g. control of speed and force for providing a high speed approach stroke with low force followed by a low speed working stroke with high force, e.g. for a hydraulic press

Definitions

  • the invention relates to a hydraulic pressure supply unit, with two alternately pressurized outputs, with a reversible pump unit with at least two pumps and all pumps together driving reversible electric motor, possibly with mutually unblocking check valves in front of the outputs, and a supply for hydraulic medium, wherein a pump as a low pressure pump and a pump is designed as a high-pressure pump, wherein the pressurized outputs of both pumps are connected to the same output of the pressure supply unit, further comprising an electro-hydraulic working unit comprising a double-acting hydraulic cylinder, an electro-hydraulic pressure supply unit for alternately pressurizing a respective working space of the working cylinder, and a connection for the external power supply.
  • the object of the present invention was therefore a pressure supply unit with which a large amount of hydraulic medium can be made available until a predefinable pressure level is reached, while after reaching this pressure level hydraulic medium with high pressure can be made available, this function is fulfilled in two simple alternately pressurized outputs.
  • Another task was then a hydraulic working unit, the working cylinder can be reversed easily reversible first in both directions, then subsequently increases the load, which may also be applied stationary, the working cylinder exerts a high force.
  • the pressure supply unit is characterized in that both outputs of the high pressure pump from the low pressure pump are separated by check valves and each pump is connected via its own shuttle valve with the supply of hydraulic fluid, and that both outputs of the low pressure pump via pressure switching valves connected to the tank are, wherein the control terminals of the pressure switching valves are connected to the outputs of the high pressure pump such that the control terminal of that Druckschaltventils is acted upon on the currently pressurized side of the currently pressurized output of the high pressure pump.
  • the low-pressure pump is switched off by this valve and the consumer then only supplied with the delivery volume of the high-pressure pump.
  • this functionality can be achieved by simply reversing the direction of rotation of the pumps at both outputs of the pressure supply unit, the check valves operating between the different pressure stages of the pressure supply unit on both sides of the pumps independently of the other side. This ensures the greatest possible independence and thus flexibility for the design of the pressure supply unit on both sides.
  • the electric motor used to drive the pumps can be just for the desired highest system pressure, i. be designed for the high-pressure pump, since at lower pressure levels even when operating both pumps in parallel with the same engine Ausmaschine can be found.
  • At least one, preferably both, of the pressure switching valves has an independently adjustable from the other pressure switching valve switching point. This allows different characteristics to be set on both outputs.
  • the pumps are designed as constant pumps, which greatly simplifies the system in terms of manufacturing as well as operation.
  • a tank for the hydraulic medium in the pressure supply unit integrated and each pump is connected to its own shuttle valve for pressure tank switching.
  • an electro-hydraulic working unit with a double-acting hydraulic cylinder whose working spaces are alternately pressurized, characterized in that the pressure supply unit formed according to one of the preceding paragraphs and each working space of the working cylinder is always connected to the same output of the pressure supply unit ,
  • This can be achieved with simple control without complicated Umschaltventilan Aunt and compact design for the working cylinder fast rapid by initially supply of hydraulic medium by both pumps together and then a high level of force, if by increasing the load on the working cylinder, the pressure level rises so much that the low pressure pump is switched off. The flow rate is then reduced to the amount provided by the high pressure pump.
  • the working cylinder is designed as a differential cylinder.
  • a correspondingly opposite adjustment of the switching points of the pressure switching valves may be advantageous.
  • the working cylinder is designed as a synchronous cylinder with extendible on both sides piston rods.
  • the system can be made completely symmetrical.
  • a different force / displacement characteristic in the different directions of movement also due to different requirements, for example, high power only required in one direction, be provided.
  • the unimpeded power stroke in the connecting lines between the pump unit of the pressure supply unit and the working chambers of the working cylinder by the pressure in the respective other line unlockable check valves intended.
  • the drawing figure shows the hydraulic circuit diagram of an electro-hydraulic working unit according to the invention, as it can be used for a wide variety of applications.
  • the electro-hydraulic working unit consists of at least one working cylinder 1, the two working chambers 2, 3, alternately acted upon by hydraulic medium and in such a way the piston 4 and the piston rod 5 off or retract.
  • a connection for the external power supply is not shown.
  • other types of working cylinders 1 possible, for example, synchronous cylinder with extendable on both sides of the piston rods.
  • releasable check valves 8 in known per se. These check valves 8 can be provided as separate components in the lines 6, 7, but also on the working cylinder 1 itself or integrated in the pressure supply unit described below.
  • the hydraulic pressure supply unit in the illustrated embodiment which can be advantageously used in such working units, has two alternately pressurized outlets, which are formed by the lines 6, 7, or connected to these lines 6, 7.
  • a reversible pump unit with at least two pumps 9, 10 and a common all reversible electric motor 11 driving all pumps 9, 10 is provided for the promotion and the pressure build-up in the hydraulic medium of the system.
  • the pressure supply unit can either be connected to an external supply for hydraulic medium or can be provided with a tank 12 integrated in the unit (shown twice in the figure in order to simplify the illustration), as a result of which the unit is as self-sufficient as possible.
  • one of the pumps 10 is designed as a low pressure pump and another pump 9 as a high pressure pump, the pressurized outputs of both pumps 9, 10 are placed on the same output 6 and 7 of the pressure supply unit. This adds up the flow rates of both pumps 9, 10 and there is a lot of hydraulic fluid in the working spaces 2 and 3 promoted, so that the piston 4 and piston rod 5 are rapidly retracted or extended with little load.
  • the high pressure pump 9 is separated from the low pressure pump 10 by 10 in the direction of the low pressure pump check valves 13.
  • Each pump 9, 10 is also connected via its own shuttle valve 14, 15 with the supply for hydraulic medium or the tank 12.
  • the two outputs of the low-pressure pump 10 are connected via a respective pressure switching valve 16, 17 to the tank 12, wherein the control terminals of the pressure switching valves 16, 17 are connected to the outputs of the high pressure pump 9 such that the control terminal of that pressure switching valve 16, 17 on the currently pressurized Side is also acted upon by the currently pressurized output of the high pressure pump 9.
  • This is due to the respective control terminal of the pressure switching valve 16, 17 of the respectively prevailing in the line 6 and 7 system pressure, which reflects the load conditions on the piston rod 5 of the working cylinder 1.
  • the pumps 9, 10 are preferably designed as constant pumps and the delivery volume of the low pressure pump 10 is greater than or equal to the delivery volume of the high pressure pump 9.
  • the terms high pressure pump 9 and low pressure pump 10 can be seen in the relative ratio of the pressures generated by the pumps 9, 10, the yes also influenced by the motor power of the drive 11 of the pump.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
EP06122576A 2005-10-28 2006-10-19 Hydraulische Druckversorgungseinheit und elektrohydraulische Arbeitseinheit Ceased EP1780420B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0074205U AT8986U1 (de) 2005-10-28 2005-10-28 Hydraulische druckversorgungseinheit, sowie elektrohydraulische arbeitseinheit und spannsystem mit einer derartigen druckversorgungseinheit

Publications (3)

Publication Number Publication Date
EP1780420A2 EP1780420A2 (de) 2007-05-02
EP1780420A3 EP1780420A3 (de) 2008-04-02
EP1780420B1 true EP1780420B1 (de) 2009-10-14

Family

ID=37592021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06122576A Ceased EP1780420B1 (de) 2005-10-28 2006-10-19 Hydraulische Druckversorgungseinheit und elektrohydraulische Arbeitseinheit

Country Status (6)

Country Link
US (1) US7493757B2 (zh)
EP (1) EP1780420B1 (zh)
KR (1) KR101311009B1 (zh)
CN (1) CN1971068B (zh)
AT (1) AT8986U1 (zh)
DE (1) DE502006005089D1 (zh)

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DE102007040345A1 (de) * 2007-07-18 2009-01-22 Robert Bosch Gmbh Verfahren zum Ansteuern eines Hubwerks und Hubwerk
DE102007040344A1 (de) * 2007-07-19 2009-01-22 Robert Bosch Gmbh Hubwerk und Verfahren zum Ansteuern eines derartigen Hubwerks
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DE202008003500U1 (de) * 2008-03-12 2009-07-30 Wagner Vermögensverwaltungs-GmbH & Co. KG Hydraulische Druckliefereinheit für einen Kraftschrauber
DE102009040347A1 (de) * 2009-09-05 2011-03-10 Alpha Fluid Hydrauliksysteme Müller GmbH Schaltungs-,Ansteuerungs- und Regelkonzeption für autarke, weggeregelte elektrohydraulische Aktoren
KR102198076B1 (ko) 2011-02-23 2021-01-05 섀플러 테크놀로지스 아게 운트 코. 카게 클러치의 작동을 위한 유압 장치
US9174632B2 (en) 2013-11-12 2015-11-03 American Axle & Manufacturing, Inc. Hydraulically operated clutch
CN104675991B (zh) * 2013-11-29 2017-06-06 天津萨克赛斯机械技术开发有限公司 一种液压同步换挡系统
CN105443462A (zh) * 2014-08-12 2016-03-30 安钛医疗设备股份有限公司 双向输出的混合液压动力系统
DE102014218884B4 (de) * 2014-09-19 2020-12-10 Voith Patent Gmbh Hydraulischer Antrieb mit Eilhub und Lasthub
DE102014218885A1 (de) * 2014-09-19 2016-03-24 Voith Patent Gmbh Hydraulischer Antrieb mit Eilhub und Lasthub
JP6449641B2 (ja) * 2014-12-16 2019-01-09 株式会社ショーワ ポンプ装置、船外機のチルト・トリム装置
JP6497925B2 (ja) * 2014-12-16 2019-04-10 株式会社ショーワ ポンプ装置、船外機のチルト・トリム装置
CN105003481B (zh) * 2015-07-01 2017-02-01 天津大学 集成式变阻尼液压支撑系统
CN107313999B (zh) * 2016-09-27 2023-05-05 湖南汽车工程职业学院 自动竹席编织机进篾、顶压篾液压驱动系统及其驱动方法
CN106763722A (zh) * 2017-03-06 2017-05-31 同济大学 双离合自动变速器液压系统
DE102017106693B3 (de) * 2017-03-29 2018-05-30 Voith Patent Gmbh Vorrichtung zum Regeln einer hydraulischen Maschine
JP7182441B2 (ja) * 2018-12-05 2022-12-02 日本電産トーソク株式会社 油圧制御装置
CN114294303A (zh) * 2022-01-05 2022-04-08 三一汽车起重机械有限公司 可调节功率的液压系统、调节方法及作业机械

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Also Published As

Publication number Publication date
US20070095060A1 (en) 2007-05-03
DE502006005089D1 (de) 2009-11-26
KR101311009B1 (ko) 2013-09-24
AT8986U1 (de) 2007-03-15
KR20070046015A (ko) 2007-05-02
CN1971068B (zh) 2010-07-21
EP1780420A2 (de) 2007-05-02
EP1780420A3 (de) 2008-04-02
CN1971068A (zh) 2007-05-30
US7493757B2 (en) 2009-02-24

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