DE2301607A1 - HYDRAULIC CONTROL DEVICE - Google Patents

HYDRAULIC CONTROL DEVICE

Info

Publication number
DE2301607A1
DE2301607A1 DE2301607A DE2301607A DE2301607A1 DE 2301607 A1 DE2301607 A1 DE 2301607A1 DE 2301607 A DE2301607 A DE 2301607A DE 2301607 A DE2301607 A DE 2301607A DE 2301607 A1 DE2301607 A1 DE 2301607A1
Authority
DE
Germany
Prior art keywords
valve
control device
throttle
hydraulic control
pressure
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.)
Pending
Application number
DE2301607A
Other languages
German (de)
Inventor
Walter Hermann
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE2301607A priority Critical patent/DE2301607A1/en
Priority to IT2858573A priority patent/IT993872B/en
Priority to GB4227273A priority patent/GB1397914A/en
Priority to JP10255973A priority patent/JPS4965465A/ja
Priority to FR7332657A priority patent/FR2199071B1/fr
Priority to US422596A priority patent/US3910045A/en
Publication of DE2301607A1 publication Critical patent/DE2301607A1/en
Pending legal-status Critical Current

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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • 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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple 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
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31523—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
    • F15B2211/31541—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member having a single pressure source and multiple 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
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31552—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line
    • F15B2211/31564—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line having multiple 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
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single 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
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional 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
    • F15B2211/30—Directional control
    • F15B2211/355—Pilot pressure 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40584—Assemblies of multiple valves the flow control means arranged in parallel with a check 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41581—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a 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
    • F15B2211/505—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
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a 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
    • F15B2211/55—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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/634—Electronic controllers using input signals representing a state of 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed

Description

Anlage zurAttachment to

Patent- undPatent and

GebrauchsmusterhilfsanmeldungUtility model registration

EOBERT BOSCH GMBH, STUTTGART EOBERT BOSCH GMBH, STUTTGART

Hydraulische Steuereinri chtung Hydraulic control device

Zusatz zu Patent Nr (Patentanmeldung P 22-44 445.7)Addition to patent no (patent application P 22-44 445.7)

Die Hauptpatentanmeldung betrifft eine hydraulische Steuereinrichtung mit wenigstens einem zum Steuern eines einfachwirkenden Verbrauchers dienenden Wegeventil in Sitzventilbauart, das in einer Neutralstellung eine zu einem Verbraucher führende erste Arbeitsleitung absperrt und in zwei Arbeitsstellungen wahlweise mit einem Zulauf oder einem Rücklauf verbindet sowie eine Steuerleitung beeinflußt, die einem Umschaltventil zur unmittelbaren Rückleitung des von der Druckmittelquelle kommenden Druckmittels in einen BehälterThe main patent application relates to a hydraulic control device with at least one directional valve of the poppet type used to control a single-acting consumer, that in a neutral position one to a consumer leading first working line shut off and in two working positions optionally with an inlet or a return connects and influences a control line, which is a switching valve for the immediate return line of the Pressure medium source coming pressure medium in a container

- 2 409829/0156 - 2 409829/0156

zugeordnet ist, und bei der in die "Verbindung zwischen Umsehaltventil und Behälter zusätzliche, den Druck steuernde Ventilmittel geschaltet sind, und ferner von dem doppeltwirkend ausgebildeten Verbraucher eine zweite Arbeitsleitung, mit dem Abschnitt der Verbindung zwischen Umschaltventil und Ventilmittel verbunden ist nach Patent ..... (Patentanmeldung P 22 44 445.7).is assigned, and in the case of the "connection between changeover valve and reservoirs additional pressure controlling valve means are connected, and furthermore double-acting from the trained consumers a second working line, is connected to the section of the connection between the switching valve and valve means according to patent ..... (patent application P 22 44 445.7).

Bei dieser Steuereinrichtung sind die den Druck steuernden Vehtilmittel als Ventile oder Kombinationen von Ventilen ausgeführt. Solche Ventile erlauben zwar eine genaue Drucksteuerung, sind aber relativ aufwendig. In manchen Änwendungsfälien können nun viskositäts- und mengenabhängige Druckschwankungen in Kauf, genommen werden, ohne dadurch die Einsatzfähigkeit der Steuereinrichtung zu verringern.In the case of this control device, the valve means controlling the pressure are designed as valves or combinations of valves. Such valves allow precise pressure control, but are relatively complex. In some cases of application pressure fluctuations dependent on viscosity and quantity can now be accepted without the operational capability to reduce the control device.

Aufgabe der Erfindung ist es, eine derartige Steuereinrichtung hoch weiter zu vereinfachen, wenn Druckschwankungen in begrenztem Maße möglich sind.The object of the invention is to provide such a control device to be simplified further if pressure fluctuations are possible to a limited extent.

Dies wird gemäß der Erfindung dadurch erreicht, daß die Ventilmittel als eine Drossel und ein dazu parallel geschaltetes, die zweite Arbeitsleitung absicherndes Eückschlagventil ausgebildet sind.This is achieved according to the invention in that the valve means designed as a throttle and a check valve connected in parallel to protect the second working line are.

Auf diese Weise kann anstelle eines Ventils z. B. in Form eines Druckbegrenzungsventils eine einfache Drossel treten, deren DruckSchwankungen keine nachteiligen Folgen auf die Funktion der Steuereinrichtung in bestimmten Anxfendungsfallen haben. Über das parallel zur Drossel geschaltete Eückschlagventil kann der Verbraueher bei Bedarf Druckmittel aus dem Behälter nachsaugen-. In this way, instead of a valve z. B. occur in the form of a pressure relief valve, a simple throttle whose Pressure fluctuations have no adverse effects on the function the control device in certain application cases. Via the check valve connected in parallel to the throttle, the consumer can suck in pressure medium from the container if necessary.

Ein Aus führung sb ex spiel des Erf indungsgegeristandes ist in der Zeichnung wiedergegeben. Diese zeigt eine hydraulische Steuereinrichtung in vereinfachter Darstellung.A version sb ex game of the subject matter of the invention is in the Drawing reproduced. This shows a hydraulic control device in a simplified representation.

- 3 -409829/0156- 3 -409829/0156

- 3 - R.I 2 7 9- 3 - R.I 2 7 9

Die 3?ig. zeigt eine Steuereinriclatung 120, bei der gleiche Teile wie bei der Steuereinrichtung 70 nach der Hauptpatentanmeldung P 22 44- 445·7ι Fig. 3 auch mit gleichen Bezugszeichen versehen sind. Die Steuereinrichtung 120 unterscheidet sich von der erwähnten Steuereinrichtung 70 durch eine andere Anschlußplatte 121, "bei der die Verbindung zwischen Umschaltventil 32 und Behälter 37 als Kanal 122 ausgeführt ist, der in der Anschlußplatte 121 in den Rücklauf 21 mündet. In den Kanal 122 sind eine Drossel 123 und parallel zur Drossel 123 ein die zweite Arbeitsleitung 72 absicherndes Rückschlagventil 124 geschaltet. Die Drossel 123 ist so ausgelegt, daß das in der zweiten Arbeitsstellung 22 der Wegeventile 16, 17 "bei laufender Pumpe 35 und offenem Umschaltventil über die Drossel 123 in den Rücklauf 21 strömende Druckmittel auf einen Druck angedrosselt \d.rd, der zur Betätigung des Hubzylinders 13 und/oder des Neigezylinders 12 ausreicht. Die Höhe dieses Drucks ist ferner derart gewählt, daß Druckschwankungen infolge Viskositäts- und/oder Mengenänderungen nicht stören. Im übrigen ist die Wirkungsweise der Einrichtung 120 wie diejenige der erwähnten Einrichtung 70.The 3? Figure 12 shows a control device 120 in the same Parts as in the control device 70 according to the main patent application P 22 44-445 · 7ι Fig. 3 are also provided with the same reference numerals. The control device 120 distinguishes from the mentioned control device 70 by a Another connection plate 121 "in which the connection between the switching valve 32 and the container 37 is designed as a channel 122 which opens into the return 21 in the connection plate 121. In the channel 122 are a throttle 123 and parallel to Throttle 123 securing the second working line 72 Check valve 124 switched. The throttle 123 is designed so that in the second working position 22 of the directional control valves 16, 17 "with the pump 35 running and the switching valve open via the Throttle 123 in the return 21 flowing pressure medium throttled to a pressure \ d.rd, which is used to actuate the lifting cylinder 13 and / or the tilt cylinder 12 is sufficient. The level of this pressure is also chosen so that pressure fluctuations as a result Do not interfere with changes in viscosity and / or quantity. Otherwise, the operation of the device 120 is like that of the device 70 mentioned.

Um die Druckeinstellung mit Hilfe der Drossel 123 zu erleichtern, kann es zweckmäßig sein, diese austauschbar in der Anschlußplatte 121 anzuordnen oder verstellbar auszubilden.In order to facilitate the pressure setting with the aid of the throttle 123, it may be expedient to have it replaceable in the connection plate 121 to be arranged or to be adjustable.

4 -4 -

409829/015409829/015

Claims (5)

- 4 - E. 12 7 9- 4 - E. 12 7 9 AnsprücheExpectations Λ J Hydraulische Steuereinrichtung mit wenigstens einem zum Steuern eines einfachwirkenden Verbrauchers dienenden Wegeventil in Sitzventilbauart, das in einer Neutralstellung ei-•ne zu einem Verbraucher führende erste Arbeitsleitung absperrt und in zwei Arbeitsstellungen wahlweise mit einem Zulauf oder einem Rücklauf verbindet sowie eine Steuerleitung beeinflußt, die einem Umschaltventil zur unmittelbaren Rückleitung des von der Druckmittelquelle kommenden Druckmittels in einen Behälter zugeordnet ist, und bei der in die Verbindung zwischen Umschaltventil und Behälter zusätzliche, den Druck steuernde Ventilmittel geschaltet sind, und ferner von dem doppeltwirkend ausgebildeten Verbraucher eine zweite Arbeitsleitung mit dem Abschnitt der Verbindung zwischen Umschaltventil und Ventilmittel verbunden ist nach Patent'..... (Patentanmeldung P 22 44 445-7), dadurch gekennzeichnet, daß die Ventilmittel als eine Drossel (123) und ein dazu parallel geschaltetes, die zweite Arbeitsleitung (72) absicherndes Rückschlagventil (124) ausgebildet sind. - · Λ J Hydraulic control device with at least one directional control valve of the poppet-type design that serves to control a single-acting consumer and that in a neutral position shuts off a first working line leading to a consumer and, in two working positions, optionally connects it to an inlet or a return and influences a control line which a switching valve is assigned to the direct return of the pressure medium coming from the pressure medium source into a container, and in which additional, pressure-controlling valve means are connected in the connection between the switching valve and the container, and also a second working line with the section of the double-acting consumer Connection between switching valve and valve means is connected according to patent '..... (patent application P 22 44 445-7), characterized in that the valve means as a throttle (123) and a connected in parallel, the second working line (72) a Back-up check valve (124) are formed. - · 2. Hydraulische Steuereinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Drossel (123) und das Rückschlagventil (124) gemeinsam mit dem Druckbegrenzungsventil (32) im Gehäuse der Anschlußplatte (121) angeordnet sind.2. Hydraulic control device according to claim 1, characterized in that that the throttle (123) and the check valve (124) together with the pressure relief valve (32) in the Housing of the connection plate (121) are arranged. 409 8 2 9/0156 - 5 -409 8 2 9/0156 - 5 - - 5 - R. 1 2 7 9 - 5 - row 1 2 7 9 5. Hydraulische Steuereinrichtung nach. Anspruch 1 oder 2, dadurch gekennzeichnet, daß' die Drossel (123) verstellbar ausgebildet ist. · . A 5. Hydraulic control device according to. Claim 1 or 2, characterized in that the throttle (123) is adjustable. ·. A. 409829/0156409829/0156 Leers ei teBlank page
DE2301607A 1972-09-11 1973-01-13 HYDRAULIC CONTROL DEVICE Pending DE2301607A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE2301607A DE2301607A1 (en) 1973-01-13 1973-01-13 HYDRAULIC CONTROL DEVICE
IT2858573A IT993872B (en) 1972-09-11 1973-09-05 HYDRAULIC CONTROL DEVICE
GB4227273A GB1397914A (en) 1972-09-11 1973-09-07 Hydraulic control device
JP10255973A JPS4965465A (en) 1972-09-11 1973-09-11
FR7332657A FR2199071B1 (en) 1972-09-11 1973-09-11
US422596A US3910045A (en) 1973-01-13 1973-12-12 Hydraulic control apparatus for hydraulic-lift end gates of moving vans and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2301607A DE2301607A1 (en) 1973-01-13 1973-01-13 HYDRAULIC CONTROL DEVICE

Publications (1)

Publication Number Publication Date
DE2301607A1 true DE2301607A1 (en) 1974-07-18

Family

ID=5868925

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2301607A Pending DE2301607A1 (en) 1972-09-11 1973-01-13 HYDRAULIC CONTROL DEVICE

Country Status (2)

Country Link
US (1) US3910045A (en)
DE (1) DE2301607A1 (en)

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US4411189A (en) * 1977-07-18 1983-10-25 The Scott And Fetzer Company Fluid flow controlling device
DE2757660A1 (en) * 1977-12-23 1979-06-28 Bosch Gmbh Robert HYDRAULIC CONTROL DEVICE WITH AT LEAST ONE DIRECTIONAL VALVE
DE2903988C2 (en) * 1979-02-02 1986-09-11 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Hydraulic power steering, in particular for motor vehicles
JPS59909Y2 (en) * 1980-06-18 1984-01-11 株式会社 モリタ製作所 Drive control circuit for dental treatment table
US4481770A (en) * 1982-03-22 1984-11-13 Caterpillar Tractor Co. Fluid system with flow compensated torque control
EP0110876B1 (en) * 1982-06-08 1987-10-07 Intreprinderea De Utilaj Greu 'progresul' Method and control device for a hydraulic hammer
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DE4439667C2 (en) * 1994-11-07 1998-07-02 Festo Ag & Co Working cylinder
US20090283160A1 (en) * 2008-05-02 2009-11-19 James Fishwick Fluid flow control device and control circuit

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GB1137347A (en) * 1965-12-02 1968-12-18 Gewerk Eisenhuette Westfalia Hydraulic drive system
US3455209A (en) * 1967-02-23 1969-07-15 Eaton Yale & Towne Hydraulic control circuit
US3604205A (en) * 1969-06-19 1971-09-14 Caterpillar Tractor Co Hydraulic fluid circuit
US3761123A (en) * 1971-12-10 1973-09-25 Applied Power Ind Inc Flow control of tilt cab in free fall
DE2244445C3 (en) * 1972-09-11 1981-06-25 Robert Bosch Gmbh, 7000 Stuttgart Hydraulic device for controlling the pressure medium paths in a system with at least one double-acting servomotor

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