EP0123088B1 - Hydraulic directional valve for controlling a double-acting servo motor - Google Patents

Hydraulic directional valve for controlling a double-acting servo motor Download PDF

Info

Publication number
EP0123088B1
EP0123088B1 EP84102571A EP84102571A EP0123088B1 EP 0123088 B1 EP0123088 B1 EP 0123088B1 EP 84102571 A EP84102571 A EP 84102571A EP 84102571 A EP84102571 A EP 84102571A EP 0123088 B1 EP0123088 B1 EP 0123088B1
Authority
EP
European Patent Office
Prior art keywords
chamber
control valve
channel
valve
housing
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.)
Expired
Application number
EP84102571A
Other languages
German (de)
French (fr)
Other versions
EP0123088A1 (en
Inventor
Wolfgang Dipl.-Ing. Kötter
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
Publication of EP0123088A1 publication Critical patent/EP0123088A1/en
Application granted granted Critical
Publication of EP0123088B1 publication Critical patent/EP0123088B1/en
Expired legal-status Critical Current

Links

Images

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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87177—With bypass
    • Y10T137/87185—Controlled by supply or exhaust valve

Definitions

  • the invention is based on a hydraulic directional control valve for controlling a double-acting motor with a 3-way flow control valve according to the preamble of the main claim.
  • a hydraulic directional control valve is already known from US Pat. No. 3,901,264 which, for control in an open circuit, has a three-chamber neutral circulation channel which is arranged in the housing in the middle between the motor chambers and the return chambers.
  • a 3-way flow control valve is arranged perpendicular to the control slide, the associated adjustment device of which protrudes outwards at the top of the valve housing between the two motor connections.
  • the disadvantage of this directional control valve is that the adjustment device is difficult to access due to its location between the pipes leading to the motor connections.
  • a hydraulic directional control valve is known from US Pat. No. 3,415,265, in which both motor connections can be supplied with a constant current from the 3-way flow control valve.
  • the chambers for supply, motor and return are arranged symmetrically to a three-chamber neutral circulation channel, so that the directional control valve can be used for a so-called left or right version.
  • a disadvantage of this directional control valve is that the two flow control valves are arranged in the hollow control slide and are therefore not adjustable from the outside. The excess residual current from a current controller is also fed into the return duct.
  • This directional valve too, cannot be changed with simple means in such a way that the constant current of the flow control valves is available for a block section from several directional valves.
  • the hydraulic directional control valve according to the invention with the characterizing features of the main claim has the advantage that its adjustment device of the flow control valve is easily accessible from the outside and also enables the same basic design for both types of circuit of the flow control valve.
  • a simple directional control valve can be implemented with simple measures from the basic design, in which only the relevant directional control valve is supplied with the constant current of the flow control valve, or a design can be achieved in which the constant current is available to a block section consisting of several directional control valves.
  • the residual current of the current controller is fed into the neutral circulation channel.
  • the adjustment device of the current regulator is now far away from the pipelines leading to the motor connections and can therefore be operated well.
  • An embodiment according to claim 2 is particularly advantageous because this favors the installation of additional valves, such as check valves in the housing in the area of the motor connections.
  • An embodiment according to claim 3 can be achieved in an expedient manner in which the constant current of the flow control valve is available for a block section of several directional control valves, which according to claim 4 is particularly compact.
  • According to claim 5 can be achieved in an advantageous manner in which the constant current of the flow control valve is available to a single directional control valve.
  • An expedient training results in claim 6, whereby the constant current to both motor connections can be controlled.
  • an embodiment can be realized in which different constant currents are possible for both motor connections. Further advantageous embodiments result from the remaining claims, the description as well as the drawing.
  • FIG. 1 shows a control device 10, in which a first, second and third directional control valve 11, 12, 13 are flanged between a connecting plate 14 and an end plate 15. All directional control valves 11 to 13 are designed as 6-way 3-position valves and are connected in series in a neutral circulation channel 16 which is guided by a pump 17 via the connecting plate 14 and the directional control valve to the end plate 15 and back into a tank 18.
  • the connecting plate 14 branches off from the neutral circulation channel 16, an inlet channel 19, to which the individual directional control valves 11 to 13 are each connected in parallel via a supply channel 21, 22 and 23.
  • a 3-way flow control valve 24 is formed in the inlet channel 19, which is adjustable from the outside. Its input 25 is connected to the upstream section of the inlet channel 19, while its constant current output 26 is connected to the downstream inlet channel 19 in such a way that the supply channels 22 and 23 run parallel to one another.
  • a residual flow duct 28 leads from a residual flow output 27 of the flow control valve 24 to the neutral circulation passage 16 in the area between the second (12) and third directional control valve 13.
  • the second directional valve 12 has a first flange surface 29 facing the first directional valve 11 and a second flange surface 31 facing the third directional valve 13.
  • the inlet channel 19 and the neutral circulation channel 16 form the respective upstream openings 32 and 33, respectively the same channels 19, 16 in the second flange surface 31 form the outlet-side openings 34 and 35, respectively.
  • FIG. 2 shows in more detail as a longitudinal section through the second directional valve 12, it has a continuous longitudinal bore 37 in a housing 36, in which a control slide 38 is guided in a tight and sliding manner.
  • a total of nine chambers are formed in the longitudinal bore 37 by annular extensions for the pressure medium control.
  • the two outer circulation chambers 39, 42 are connected to the upstream opening 33 in the first flange surface 29, while the middle circulation chamber 41 is connected to the downstream opening 35 in the second flange surface 31.
  • a first (43) and a second supply chamber 44, a first (45) and a second motor chamber 46 as well as a first (47) and a second return chamber 48 lie on both sides of the circulation chambers 39, 41, 42.
  • the two return chambers 47 , 48 are connected to one another via a transverse channel 49, which in turn is connected to a return channel 51.
  • Motor connections 52 and 53 are assigned to the two motor chambers 45, 46 in a manner known per se. All of the chambers 39 to 48 in the longitudinal bore 37 are thus formed symmetrically with respect to a central axis which runs through the central circulation chamber 41.
  • FIG. 2 also shows, in the housing 36, starting from the middle circulation chamber 41, a bridge channel 54 branching out in a fork shape runs downward, with respect to the longitudinal bore 37 in a direction opposite to the position of the motor connections 52, 53.
  • the bridge channel 54 forks into two branches 55, 56, the mutually parallel ends of which cross a first (57) and a second auxiliary bore 58 and form residual flow chambers 59 and 61 there.
  • the two auxiliary bores 57, 58 lie in the housing 36 coaxially to one another and run parallel to the longitudinal bore 37.
  • auxiliary bores 57, 58 introduced from both end faces of the housing end in a central inlet chamber 62 which is enclosed by both branches 55, 56 and which via the opening 32 to the upstream section of the inlet channel 19. Adjacent to the residual flow chambers 59, 61, a first (63) or a second constant flow chamber 64 is arranged on the outside.
  • the two auxiliary bores 57, 58 and the chambers assigned to them are thus also symmetrical to the central axis mentioned.
  • the two constant current chambers 63, 64 are connected to each other by a transverse bore closed to the outside.
  • the transverse bore 65 also runs parallel to the longitudinal bore 37 in the housing 36 and in a region between the latter (37) and the auxiliary bores 57, 58.
  • FIG. 3 shows in more detail, the downstream portion of the inlet channel 19 leads from the transverse bore 65 to the associated opening 34 in the second flange surface 31.
  • two blind holes 66, 67 are arranged in the housing 36 symmetrically to a central plane, each of which extends into the transverse bore 65.
  • the control slide 38 guided in the longitudinal bore 37 is symmetrical in a manner known per se and has five piston sections 71 to 75. At the end 75 protruding from the housing 36, it is assigned to the operating side 76 of the directional control valve 12, while a double-acting return device 77 is assigned to its opposite piston section 71. With its central piston sections 72 to 74, it keeps the neutral circulation channel 16 open in the neutral position shown and the two motor chambers 45, 46 are hydraulically blocked. In the event of deflections in working positions lying on both sides of the neutral position, the neutral circulation channel 16 is closed and one of the supply chambers 43 or 44 is connected to the motor chamber 45 or 46, while the other motor chamber 46 or 45 is connected to the associated return chamber 48 or 47.
  • a valve insert 78 is built into the housing 36 in the first auxiliary bore 57 and forms part of the 3-way flow control valve 24.
  • the valve insert 78 has an outwardly projecting adjusting device 79 screwed into the housing 36, which is arranged on the same side as the double-acting return device 77.
  • the valve insert 78 includes a hollow slide 81 which slides in the first auxiliary bore 57 and serves as a control slide, and which is guided axially movable but secured against rotation by a bolt 82 fixed to the housing.
  • the hollow slide 81 bears against this bolt 82 in its starting position under the force of the control spring 83, wherein it interrupts the connection from the inlet chamber 62 to the first residual flow chamber 54 with a control edge 84.
  • the hollow slide 81 is open at the end toward the inlet chamber 62 and has radial control openings 85 located in the region of the first constant-current chamber 63, a throttle piston 86 adjustable from the outside by the adjusting device 79 forming the adjustable measuring orifice 87.
  • a plug 88 is arranged, which separates the inlet chamber 62 from the second residual flow chamber 61 and from the second constant flow chamber 64 and blocks them from the outside.
  • control spool 38 of the second directional control valve 12 If the control spool 38 of the second directional control valve 12 is moved to the right into its first working position 89, the control spool 38 interrupts the neutral circulation channel 16.
  • the pump now conveys pressure medium into the supply channel 19, which via the opening 32 in the first flange surface 29 into the supply chamber 62 streams. From there, pressure medium passes through the hollow slide 81 and via the measuring orifice 87 into the first constant-current chamber 63 and further via the first check valve 68 into the first supply chamber 43 and via the first motor chamber 45 to the first motor connection 52.
  • the size of this for the motor connection 52 flowing constant current can be varied from the outside with the aid of the adjusting device 79 by adjusting the orifice 87.
  • the residual current going beyond the constant current into the branch 55 of the bridge channel 54 is controlled when the control edge 84 on the hollow slide 81 opens the connection from the inlet chamber 62 to the first residual current chamber 59.
  • This residual flow passes from the bridge channel 54 into the middle circulation chamber 41 and thus to the downstream opening 35 of the neutral circulation channel in the second flange surface 31 and further via the open neutral circulation channel 16 in the third directional control valve 13 back to the tank 18.
  • the first motor connection 52 is included is supplied with a constant current, the pressure medium flow coming back from the consumer flows simultaneously from the second motor connection 53 via the second motor chamber 46, the second Return chamber 48, the transverse channel 49 and the return channel 51 to the tank 18.
  • the second motor connection 53 is now supplied with a constant current in a corresponding manner, while the first motor connection 52 to the tank 18 is relieved.
  • the constant current coming from the inlet chamber 62 via the flow control valve 24 into the first constant flow chamber 63 now flows through the transverse bore 65 and the second check valve 69 into the second supply chamber 44.
  • No pressure medium can flow through the outlet 34 in the second flange surface 31 flow out, since the downstream section of the inlet channel 19 and the supply channel 23 to the third directional control valve 13 are blocked hydraulically.
  • the remaining pressure medium flow controlled by the flow control valve 24 via the circulation chamber 41 into the neutral circulation channel 16 flows to the tank 18.
  • the third directional control valve 13 If the third directional control valve 13 is actuated alone, its associated consumer is also supplied with a constant current from the flow control valve 24 via the third supply channel 23. Since the neutral circulation channel 16 in the third directional control valve 13 is interrupted and the residual flow channel 28 is also hydraulically blocked, the flow control valve 24 now works as a 2-way control valve. In addition, both directional control valves 12 and 13 can also be actuated simultaneously, the consumer being supplied with lower load pressure first in a manner known per se.
  • FIG. 6 now shows a partial longitudinal section through the second directional valve 101, the housing 102 of which differs from the housing 36 of the second directional valve 12 in a simple manner in that the inlet channel 19 penetrating the inlet chamber 62 is now designed as a continuous bore which the two associated openings 32 and 34 in the flange surfaces 29 and 31 connects to each other. So that this inlet channel 19 can now be formed continuously, the function of the transverse bore 65 in the housing 36 according to FIG. 2 is now taken over by a constant current channel 103 which connects the two constant current chambers 63, 64 to one another. This channel 103 is now below the auxiliary bores 57, 58.
  • the mode of operation of the second directional valve 101 within the second control device 100 differs from that of the second directional valve 12 in the control device 10 only in that the constant current of the flow control valve 24 is now only available to the single directional valve 101.
  • FIG. 7 shows a partial longitudinal section through a third embodiment of a second directional control valve 110, which differs from that according to FIG. 6 as follows, the same reference symbols being used for the same parts:
  • the directional control valve 110 has a housing 111 which is separate from the housing 101 differs only in that the constant current channel 103 is omitted.
  • a second valve insert 112 is installed there, so that constant currents of different sizes can be set for both motor connections 52 and 53. Otherwise, the operation of the directional valve 110 corresponds to that of the directional valve 101.
  • the directional valves 12, 101, 110 shown can thus be implemented in an advantageous manner by slight changes from a single basic housing in such a way that two different circuit arrangements of the flow control valve are possible and its adjustment device is always easily accessible from the outside. It is also advantageous that the directional control valves 12 and 101 can be easily changed from the drawn left-hand version to a right-hand version, with the accessibility of the adjusting device 79 being retained. If, in a right-hand version, the return device 77 comes to rest on the end face of the housing assigned to the piston section 75, the valve insert 78 can also be moved into the second auxiliary bore 58 and the first auxiliary bore 57 can accommodate a sealing plug 88.
  • valve inserts with hollow slide 81 enables a compact, variable construction and avoids multiple guiding of the hollow slide.
  • different constant currents for both motor connections can be used to freely select the speed of forward and backward movement. This can be done by simply replacing one plug with another Reach valve insert.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Multiple-Way Valves (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem hydraulischen Wegeventil zum Steuern eines doppeltwirkenden Motors mit einem 3Wege-Stromregelventil nach der Gattung des Hauptanspruchs. Es ist schon ein solches hydraulisches Wegeventil aus der US-A-3 3 901 264 bekannt, das für eine Steuerung im offenen Kreis einen mit drei Kammern ausgebildeten Neutralumlaufkanal aufweist, der im Gehäuse mittig zwischen den Motorkammern und den Rücklaufkammern angeordnet ist. In der gleichen Querschnittsebene wie die Umlaufkammern ist senkrecht zum Steuerschieber ein 3-Wege-Stromregelventil angeordnet, dessen zugehörige Verstelleinrichtung an der Oberseite des Ventilgehäuses zwischen den beiden Motoranschlüssen nach außen ragt. Von Nachteil bei diesem Wegeventil ist, daß die Verstelleinrichtung durch ihre Lage zwischen den an die Motoranschlüsse heranführenden Rohrleitungen schlecht zugänglich ist. Zudem führt die nach oben herausgeführte Verstelleinrichtung auch häufig zu Einbauproblemen beim Wegeventil. Die zueinander senkrechte Lage von Steuerschieber und Stromregelventil führt ferner dazu, daß Schieberbohrungen in zwei zueinander senkrecht stehenden Achsen bearbeitet werden müssen, was sich kostenerhöhend ausvirkt. Weiterhin führt diese senkrechte Anordnung zu einer relativ komplizierten und damit teueren Bauart des Stromregelventils, bei der ferner enge Querschnitte auftreten können. Diese Anordnung des Stromregelventils hat ferner den Nachteil, daß sie sich schlecht zur Anordnung von Zusatzventilen im Bereich der Motoranschlüsse eignet. Auch können bei der bekannten Bauart nur gleich große Konstantströme zu den Motoranschlüssen gesteuert verden. Darüber hinaus hat dieses Wegeventil vor allem den Nachteil, daß der Konstantstrom des Stromreglers nur zu dem betreffenden, einen Wegeventil gesteuert werden kann und nicht für einen Blockabschnitt aus mehreren Wegeventilen zur Verfügung steht.The invention is based on a hydraulic directional control valve for controlling a double-acting motor with a 3-way flow control valve according to the preamble of the main claim. Such a hydraulic directional control valve is already known from US Pat. No. 3,901,264 which, for control in an open circuit, has a three-chamber neutral circulation channel which is arranged in the housing in the middle between the motor chambers and the return chambers. In the same cross-sectional plane as the circulation chambers, a 3-way flow control valve is arranged perpendicular to the control slide, the associated adjustment device of which protrudes outwards at the top of the valve housing between the two motor connections. The disadvantage of this directional control valve is that the adjustment device is difficult to access due to its location between the pipes leading to the motor connections. In addition, the adjustment device led upwards also frequently leads to installation problems with the directional control valve. The mutually perpendicular position of the control spool and flow control valve also means that spool bores have to be machined in two mutually perpendicular axes, which increases costs. Furthermore, this vertical arrangement leads to a relatively complicated and therefore expensive type of flow control valve, in which narrow cross sections can also occur. This arrangement of the flow control valve also has the disadvantage that it is poorly suited for the arrangement of additional valves in the area of the motor connections. Also, in the known type, only constant currents of the same size can be controlled to the motor connections. In addition, this directional control valve has the particular disadvantage that the constant current of the current regulator can only be controlled to the relevant directional control valve and is not available for a block section consisting of several directional control valves.

Ferner ist aus der US-A-3 415 265 ein hydraulisches Wegeventil bekannt, bei dem beide Motoranschlüsse mit einem Konstantstrom vom 3-Wege-Stromregelventil versorgbar sind. Dabei sind die Kammern für Versorgung, Motor und Rücklauf symmetrisch zu einem aus drei Kammern bestehenden Neutralumlaufkanal angeordnet, so daß das Wegeventil für eine sogenannte Links- oder Rechtsausführung verwendbar ist. Nachteilig bei diesem Wegeventil ist jedoch, daß die beiden Stromregelventile in dem hohlen Steuerschieber angeordnet und damit von außen nicht verstellbar sind. Der überschüssige Reststrom eines Stromreglers wird zudem in den Rücklaufkanal geleitet. Auch dieses Wegeventil ist nicht mit einfachen Mitteln so veränderbar, daß der Konstantstrom der Stromregelventile für einen Blockabschmitt aus mehreren Wegeventilen zur Verfügung steht.Furthermore, a hydraulic directional control valve is known from US Pat. No. 3,415,265, in which both motor connections can be supplied with a constant current from the 3-way flow control valve. The chambers for supply, motor and return are arranged symmetrically to a three-chamber neutral circulation channel, so that the directional control valve can be used for a so-called left or right version. A disadvantage of this directional control valve, however, is that the two flow control valves are arranged in the hollow control slide and are therefore not adjustable from the outside. The excess residual current from a current controller is also fed into the return duct. This directional valve, too, cannot be changed with simple means in such a way that the constant current of the flow control valves is available for a block section from several directional valves.

Vorteile der ErfindungAdvantages of the invention

Das erfindungsgemäße hydraulische Wegeventil mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß seine Verstelleinrichtung des Stromregelventils von außen leicht zugänglich ist und zudem eine gleiche Grundausführung für beide Schaltungsarten des Stromregelventils ermöglicht. So läßt sich lediglich mit einfachen Maßnahmen aus der Grundausführung ein Wegeventil realisieren, bei dem nur das betreffende Wegeventil mit dem Konstantstrom des Stromregelventils versorgt wird oder es läßt sich eine Ausführung erreichen, bei welcher der Konstantstrom einem Blockabschnitt aus mehreren Wegeventilen zur Verfügung steht. In jedem Fall wird dabei der Reststrom des Stromreglers in den Neutralumlaufkanal geleitet. Die Verstelleinrichtung des Stromreglers ist nun von den zu den Motoranschlüssen führenden Rohrleitungen weit entfernt und kann deshalb gut bedient werden. Alle Schieberbohrungen im Gehäuse sind nun von der gleichen Stirnfläche aus bearbeitbar, was sich kostensenkend auswirkt. Zweckmäßig ist ferner, daß sich die Ausdehnung des Gehäuses in Längsachse des Steuerschiebers durch diese Anordnung des Stromregelventils nicht vergrößert. Besonders vorteilhaft ist ferner, daß sich diese Bauart für die sogenannte Links- und Rechtsausführung eignet.The hydraulic directional control valve according to the invention with the characterizing features of the main claim has the advantage that its adjustment device of the flow control valve is easily accessible from the outside and also enables the same basic design for both types of circuit of the flow control valve. Thus, a simple directional control valve can be implemented with simple measures from the basic design, in which only the relevant directional control valve is supplied with the constant current of the flow control valve, or a design can be achieved in which the constant current is available to a block section consisting of several directional control valves. In any case, the residual current of the current controller is fed into the neutral circulation channel. The adjustment device of the current regulator is now far away from the pipelines leading to the motor connections and can therefore be operated well. All slide bores in the housing can now be machined from the same end face, which reduces costs. It is also expedient that the expansion of the housing in the longitudinal axis of the control slide is not increased by this arrangement of the flow control valve. It is also particularly advantageous that this type of construction is suitable for the so-called left and right-hand versions.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Wegeventils möglich. Besonders vorteilhaft ist eine Ausbildung gemäß Anspruch 2, weil dies einen Einbau von Zusatzventilen wie z.B. Sperrventilen im Gehäuse im Bereich der Motor-anschlüsse begünstigt. Gemäß Anspruch 3 läßt sich in zweckmäßiger Weise eine Ausführung erreichen, bei welcher der Konstantstrom des Strom regelventils für einen Blockabschnitt aus mehreren Wegeventilen zur Verfügung steht, wobei gemäß Anspruch 4 diese besonders kompakt baut. Gemäß Anspruch 5 läßt sich in vorteilhafter Weise eine Ausführung erreichen, bei welcher der Konstantstrom des Stromregelventils einem einzelnen Wegeventil zur Verfügung steht. Eine zweckmäßige Ausbildung ergibt Anspruch 6, wodurch der Konstantstrom zu beiden Motoranschlüssen gesteuert werden kann. Gemäß Anspruch 7 läßt sich eine Ausführung realisieren, bei der für beide Motoranschlüsse unterschiedliche Konstantströme möglich sind. Weitere vorteilhafte Ausgestaltungen ergeben sich aus den übrigen Ansprüchen, der Beschreibung sowie der Zeichnung.Advantageous further developments and improvements of the directional valve specified in the main claim are possible through the measures listed in the subclaims. An embodiment according to claim 2 is particularly advantageous because this favors the installation of additional valves, such as check valves in the housing in the area of the motor connections. According to claim 3 can be achieved in an expedient manner in which the constant current of the flow control valve is available for a block section of several directional control valves, which according to claim 4 is particularly compact. According to claim 5 can be achieved in an advantageous manner in which the constant current of the flow control valve is available to a single directional control valve. An expedient training results in claim 6, whereby the constant current to both motor connections can be controlled. According to claim 7, an embodiment can be realized in which different constant currents are possible for both motor connections. Further advantageous embodiments result from the remaining claims, the description as well as the drawing.

Zeichnungdrawing

Drei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen

  • Figur 1 eine Steuereinrichtung mit einem ersten Ausführungsbeispiel des erfindungsgemäßen Wegeventils in vereinfachter Darstellung
  • Figur 2 einen Längsschnitt durch das erfindungsgemäße Wegeventil nach Figur 1,
    • Figur 3 einen Querschnitt nach I-I in Figur 2 und
    • Figur 4 einen Querschnitt nach II-II in Figur 2.
    • Figur 5 zeigt eine Steuereinrichtung mit einer zweiten Ausführungsform des erfindungsgemäßen Wegeventils in vereinfachter Darstellung,
    • Figur 6 einen teilweisen Längsschnitt durch das erfindungsgemäße Wegeventil nach Figur 5 und
    • Figur 7 einen teilweisen Längsschnitt durch eine dritte Ausführungsform des Wegeventils.
Three embodiments of the invention are shown in the drawing and explained in more detail in the following description. Show it
  • Figure 1 shows a control device with a first embodiment of the directional control valve according to the invention in a simplified representation
  • FIG. 2 shows a longitudinal section through the directional valve according to the invention according to FIG. 1,
    • 3 shows a cross section according to II in Figure 2 and
    • FIG. 4 shows a cross section according to II-II in FIG. 2.
    • FIG. 5 shows a control device with a second embodiment of the directional valve according to the invention in a simplified representation,
    • Figure 6 is a partial longitudinal section through the directional control valve according to the invention according to Figure 5 and
    • 7 shows a partial longitudinal section through a third embodiment of the directional valve.

Beschreibung derdescription of AusführungsbeispieleEmbodiments

Die Figur 1 zeigt eine Steuereinrichtung 10, bei der ein erstes, zweites bzw. drittes Wegeventil 11, 12, 13 zwischen eine Anschlußplatte 14 und eine Endplatte 15 geflanscht sind. Alle Wegeventile 11 bis 13 sind als 6-Wege-3Stellungs-Ventile ausgebildet und hintereinander in einen Neutralumlaufkanal 16 geschaltet, der von einer Pumpe 17 über die Anschlußplatte 14 und die Wegeventile hinweg zur Endplatte 15 und wieder zurück in einen Tank 18 geführt ist. In der Anschlußplatte 14 zweigt von dem Neutralumlaufkanal 16 ein Zulaufkanal 19 ab, an den die einzelnen Wegeventile 11 bis 13 jeweils über einen Versorgungskanal 21, 22 bzw. 23 parallel angeschlossen sind.1 shows a control device 10, in which a first, second and third directional control valve 11, 12, 13 are flanged between a connecting plate 14 and an end plate 15. All directional control valves 11 to 13 are designed as 6-way 3-position valves and are connected in series in a neutral circulation channel 16 which is guided by a pump 17 via the connecting plate 14 and the directional control valve to the end plate 15 and back into a tank 18. In the connecting plate 14 branches off from the neutral circulation channel 16, an inlet channel 19, to which the individual directional control valves 11 to 13 are each connected in parallel via a supply channel 21, 22 and 23.

In dem erfindungsgemäßen Wegeventil 12 ist in den Zulaufkanal 19 ein 3Wege-Stromregelventil 24 geschalet, das von außen verstellbar ist. Sein Eingang 25 ist mit dem stromaufwärts liegenden Abschnitt des Zulaufkanals 19 verbunden, während sein Konstantstrom-Ausgang 26 so mit dem stromabwärts liegenden Zulaufkanal 19 verbunden ist, daß die Versorgungskanäle 22 und 23 parallel zueinander verlaufen. Von einem Reststrom-Ausgang 27 des Stromregelventils 24 führt ein Reststromkanal 28 zum Neutralumlaufkanal 16 im Bereich zwischen zweitem (12) und drittem Wegeventil 13.In the directional control valve 12 according to the invention, a 3-way flow control valve 24 is formed in the inlet channel 19, which is adjustable from the outside. Its input 25 is connected to the upstream section of the inlet channel 19, while its constant current output 26 is connected to the downstream inlet channel 19 in such a way that the supply channels 22 and 23 run parallel to one another. A residual flow duct 28 leads from a residual flow output 27 of the flow control valve 24 to the neutral circulation passage 16 in the area between the second (12) and third directional control valve 13.

Das zweite Wegeventi) 12 hat eine dem ersten Wegeventil 11 zugewandte erste Flanschfläche 29 sowie eine dem dritten Wegeventil 13 zugewandte zweite Flanschfläche 31. In der ersten Flanschfläche 29 bilden der Zulaufkanal 19 sowie der Neutralumlaufkanal 16 die jeweils stromaufwärts liegenden Öffnungen 32 bzw. 33, während die gleichen Kanäle 19, 16 in der zweiten Flanschfläche 31 die ablaufseitigen Öffnungen 34 bzw. 35 bilden.The second directional valve 12 has a first flange surface 29 facing the first directional valve 11 and a second flange surface 31 facing the third directional valve 13. In the first flange surface 29, the inlet channel 19 and the neutral circulation channel 16 form the respective upstream openings 32 and 33, respectively the same channels 19, 16 in the second flange surface 31 form the outlet-side openings 34 and 35, respectively.

Wie Figur 2 als Längsschnitt durch das zweite Wegeventil 12 näher zeigt, weist es in einem Gehäuse 36 eine durchgehende Längsbohrung 37 auf, im der ein Steuerschieber 38 dicht und gleitend geführt ist. In der Längsbohrung 37 sind durch ringförmige Erweiterungen für die Druckmittelsteuerung insgesamt neun Kammern ausgebildet. Davon dienen drei, in der Mitte des Gehäuses 36 angeordnete Kammern als Umlaufkammern 39,41,42, welche dem Neutralumlaufkanal 16 zugeordnet sind. Wie dabei Figur 4 näher zeigt, sind die beiden äußeren Umlaufkammern 39,42 mit der stromaufwärts liegenden Öffnung 33 in der ersten Flanschfläche 29 verbunden, während die mittlere Umlaufkammer4l mit der stromabwärts liegenden Öffnung 35 in der zweiten Flanschfläche 31 Verbindung hat. Zu beiden Seiten der Umlaufkammern 39, 41, 42 liegen angrenzend an letzere eine erste (43) bzw. zweite Versorgungskammer44, eine erste (45) bzw. zweite Motorkammer 46 sowie eine erste (47) bzw. zweite Rücklaufkammer 48. Die beiden Rücklaufkammern 47,48 sind über einen Querkanal 49 miteinander verbunden, der seinerseits mit einem Rücklaufkanal 51 in Verbindung steht. Den beiden Motorkammern 45, 46 sind in an sich bekannter Weise Motoranschlüsse 52 bzw. 53 zugeordnet. Sämtliche Kammern 39 bis 48 in Längsbohrung 37 sind somit symmetrisch zu einer Mittelachse ausgebildet, die durch die mittlere Umlaufkammer41 verläuft.As FIG. 2 shows in more detail as a longitudinal section through the second directional valve 12, it has a continuous longitudinal bore 37 in a housing 36, in which a control slide 38 is guided in a tight and sliding manner. A total of nine chambers are formed in the longitudinal bore 37 by annular extensions for the pressure medium control. Three of these, in the middle of the housing 36, serve as circulation chambers 39, 41, 42, which are assigned to the neutral circulation channel 16. As shown in FIG. 4 in more detail, the two outer circulation chambers 39, 42 are connected to the upstream opening 33 in the first flange surface 29, while the middle circulation chamber 41 is connected to the downstream opening 35 in the second flange surface 31. A first (43) and a second supply chamber 44, a first (45) and a second motor chamber 46 as well as a first (47) and a second return chamber 48 lie on both sides of the circulation chambers 39, 41, 42. The two return chambers 47 , 48 are connected to one another via a transverse channel 49, which in turn is connected to a return channel 51. Motor connections 52 and 53 are assigned to the two motor chambers 45, 46 in a manner known per se. All of the chambers 39 to 48 in the longitudinal bore 37 are thus formed symmetrically with respect to a central axis which runs through the central circulation chamber 41.

Wie Figur 2 ferner zeigt, verläuft im Gehäuse 36 ausgehend von der mittleren Umlaufkammer 41 ein gabelförmig sich verzweigender Bruckenkanal 54 nach unten, in bezug auf die Längsbohrung 37 also in eine zur Lage der Motoranschlüsse 52, 53 entgegengesetzt verlaufende Richtung. Der Brückenkanal 54 gabelt sich in zwei Zweige 55, 56, deren zueinander parallel verlaufende Enden eine erste (57) bzw. eine zweite Hilfsbohrung 58 kreuzen und dort Reststromkammern 59 bzw. 61 bilden. Die beiden Hilfsbohrungen 57, 58 liegen im Gehäuse 36 koaxial zueinander und verlaufen parallel zur Längsbohrung 37. Die von beiden Stirnseiten des Gehäuses her eingebrachten Hilfsbohrungen 57, 58 enden in einer mittig liegenden Zulaufkammer 62, die von beiden Zweigen 55,56 eingeschlossen wird und die über die Öffnung 32 mit dem stromaufwärts liegenden Abschnitt des Zulaufkanals 19 Verbindung hat. Angrenzend an die Reststromkammern 59, 61 ist nach außen hin eine erste (63) bzw. eine zweite Konstantstrom-Kammer 64 angeordnet. Die beiden Hilfsbohrungen 57, 58 sowie die diesen zugeordneten Kammern liegen somit ebenfalls symmetrisch zu der erwähnten Mittelachse.As FIG. 2 also shows, in the housing 36, starting from the middle circulation chamber 41, a bridge channel 54 branching out in a fork shape runs downward, with respect to the longitudinal bore 37 in a direction opposite to the position of the motor connections 52, 53. The bridge channel 54 forks into two branches 55, 56, the mutually parallel ends of which cross a first (57) and a second auxiliary bore 58 and form residual flow chambers 59 and 61 there. The two auxiliary bores 57, 58 lie in the housing 36 coaxially to one another and run parallel to the longitudinal bore 37. The auxiliary bores 57, 58 introduced from both end faces of the housing end in a central inlet chamber 62 which is enclosed by both branches 55, 56 and which via the opening 32 to the upstream section of the inlet channel 19. Adjacent to the residual flow chambers 59, 61, a first (63) or a second constant flow chamber 64 is arranged on the outside. The two auxiliary bores 57, 58 and the chambers assigned to them are thus also symmetrical to the central axis mentioned.

Wie die Figur 2 in Verbindung mit Figur 3 und 4 näher zeigt, sind die beiden Konstantstrom-Kammern 63, 64 durch eine nach außen verschlossene Quernbohrung mit einander verbunden. Die Querbohrung 65 verläuft im Gehäuse 36 ebenfalls parallel zur Längsbohrung 37 und in einem Bereich zwischen letzterer (37) und den Hilfsbohrungen 57, 58. Wie Figur 3 näher zeigt, führt von der Querbohrung 65 der stromabwärts liegende Abschnitt des Zulaufkanals 19 zu der zugeordneten Öffnung 34 in der zweiten Flanschfläche 31. Von der ersten Flanschfläche 29 ausgehend sind im Gehäuse 36 symmetrisch zu einer Mittelebene zwei Sacklochbohrungen 66, 67 angeordnet, die jeweils in die Querbohrung 65 hinein verlaufen. Diese beiden Sacklochbohrungen 66, 67 nehmen ein erstes (68) bzw. ein zweites Rückschlagventil 69 auf, welche die zugeordneten Versorgungskammern 43,44 absichern. Die erste Konstantstrom-Kammer 63 steht auf diese Weise über die Querbohrung 65 und die beiden Rückschlagventile 68, 69 mit beiden Versorgungskammern 43, 44 in Verbindung. Wie Figur 3 somit näher zeigt, ist im Gehäuse 36 die unmittelbare Verbindung zwischen den zugeordneten Öffnungen 32 und 34 des Zulaufkanals 19 unterbrochen.Like FIG. 2 in connection with FIGS. 3 and 4 shows in more detail, the two constant current chambers 63, 64 are connected to each other by a transverse bore closed to the outside. The transverse bore 65 also runs parallel to the longitudinal bore 37 in the housing 36 and in a region between the latter (37) and the auxiliary bores 57, 58. As FIG. 3 shows in more detail, the downstream portion of the inlet channel 19 leads from the transverse bore 65 to the associated opening 34 in the second flange surface 31. Starting from the first flange surface 29, two blind holes 66, 67 are arranged in the housing 36 symmetrically to a central plane, each of which extends into the transverse bore 65. These two blind holes 66, 67 receive a first (68) and a second check valve 69, which protect the assigned supply chambers 43, 44. In this way, the first constant flow chamber 63 is connected to the two supply chambers 43, 44 via the transverse bore 65 and the two check valves 68, 69. As FIG. 3 thus shows in more detail, the direct connection between the associated openings 32 and 34 of the inlet channel 19 is interrupted in the housing 36.

Der in der Längsbohrung 37 geführte Steuerschieber 38 ist in an sich bekannter Weise symmetrisch ausgebildet und weist fünf Kolbenabschnitte 71 bis 75 auf. An dem aus dem Gehäuse 36 herausragenden Ende 75 ist er der Bedienseite 76 des Wegeventils 12 zugeordnet, während seinem gegenüberliegenden Kolbenabschnitt 71 eine doppeltwirkende Rückholeinrichtung 77 zugeordnet ist. Mit seinen mittleren Kolbenabschnitten 72 bis 74 hält er in der gezeichneten Neutralstellung den Neutralumlaufkanal 16 offen und die beiden Motorkammern 45,46 sind hydraulisch blockiert. Bei Auslenkungen in beiderseits der Neutralstellung liegende Arbeitsstellungen wird der Neutralumlaufkanal 16 zugesteuert und eine der Versorgungskammern 43 bzw. 44 mit der Motorkammer 45 bzw. 46 verbunden, während die andere Motorkammern 46 bzw. 45 mit der zugeordneten Rücklaufkammer 48 bzw. 47 Verbindung erhält.The control slide 38 guided in the longitudinal bore 37 is symmetrical in a manner known per se and has five piston sections 71 to 75. At the end 75 protruding from the housing 36, it is assigned to the operating side 76 of the directional control valve 12, while a double-acting return device 77 is assigned to its opposite piston section 71. With its central piston sections 72 to 74, it keeps the neutral circulation channel 16 open in the neutral position shown and the two motor chambers 45, 46 are hydraulically blocked. In the event of deflections in working positions lying on both sides of the neutral position, the neutral circulation channel 16 is closed and one of the supply chambers 43 or 44 is connected to the motor chamber 45 or 46, while the other motor chamber 46 or 45 is connected to the associated return chamber 48 or 47.

Im Gehäuse 36 ist in die erste Hilfsbohrung 57 ein an sich bekannter Ventileinsatz 78 eingebaut, der ein Teil des 3Wege-Stromregelventils 24 bildet. Der Ventileinsatz 78 weist eine nach außen ragende, im Gehäuse 36 eingeschraubte Verstelleinrichtung 79 auf, die auf der gleichen Seite wie die doppeltwirkende Rückholeinrichtüng 77 angeordnetist. Zu dem Ventileinsatz 78 gehört ein in der ersten Hilfsbohrung 57 gleitender, als Regelschieber dienender Hohlschieber 81, der durch einen gehäusefesten Bolzen 82 axial beweglich aber gegen Verdrehung gesichert geführt ist. Der Hohlschieber 81 legt sich unter der Kraft der Regelfeder 83 an diesen Bolzen 82 in seiner Ausgangsstellung an, wobei er mit einer Steuerkante 84 die Verbindung von der Zulaufkammer 62 zur ersten Reststromkammer 54 unterbricht. Der Hohlschieber 81 ist stirnseitig zur Zulaufkammer 62 hin offen und weist im Bereich der ersten Konstantstrom-Kammer 63 liegende, radiale Steueröffnungen 85 auf, wobei ein von außen durch die Verstelleinrichtung 79 verstellbarer Drosselkolben 86 die verstellbare Meßblende 87 bildet.A valve insert 78, known per se, is built into the housing 36 in the first auxiliary bore 57 and forms part of the 3-way flow control valve 24. The valve insert 78 has an outwardly projecting adjusting device 79 screwed into the housing 36, which is arranged on the same side as the double-acting return device 77. The valve insert 78 includes a hollow slide 81 which slides in the first auxiliary bore 57 and serves as a control slide, and which is guided axially movable but secured against rotation by a bolt 82 fixed to the housing. The hollow slide 81 bears against this bolt 82 in its starting position under the force of the control spring 83, wherein it interrupts the connection from the inlet chamber 62 to the first residual flow chamber 54 with a control edge 84. The hollow slide 81 is open at the end toward the inlet chamber 62 and has radial control openings 85 located in the region of the first constant-current chamber 63, a throttle piston 86 adjustable from the outside by the adjusting device 79 forming the adjustable measuring orifice 87.

In der zweiten Hilfsbohrung 58 ist ein Verschlußstopfen 88 angeordnet, der die Zulaufkammer 62 von der zweiten Reststromkammer 61 sowie von der zweiten Konstantstrom-Kammer 64 trennt und diese nach außen hin absperrt.In the second auxiliary bore 58, a plug 88 is arranged, which separates the inlet chamber 62 from the second residual flow chamber 61 and from the second constant flow chamber 64 and blocks them from the outside.

Die Wirkungsweise des Wegeventils 12 innerhalb der Steuereinrichtung 10 wird wie folgt erläutert, wobei auf die Figuren 1 bis4 Bezug genommen wird:

  • Befindet sich der Steuerschieber 38 des zweiten Wegeventils 12 ebenso wie die Steuerschieber der anderen Wegeventile 11 und 13 in ihren jeweiligen Mittelstellungen, so fließt das von der Pumpe 17 geförderte Druckmittel über den Neutralumlaufkanal 16 zur Endplatte 15 und über den Rücklaufkanal 51 zurück zum Tank 18. Im Wegeventil 36 sind dabei die beiden Zweige 55, 56 des Brückenkanals 54 einmal durch den Hohlschieber 81 des Stromregelventils 24 und zum anderen durch den Verschlußstopfen 88 hydraulisch blockiert.
The operation of the directional valve 12 within the control device 10 is explained as follows, reference being made to FIGS. 1 to 4:
  • If the control spool 38 of the second directional valve 12, like the control spool of the other directional control valves 11 and 13, is in its respective middle positions, the pressure medium conveyed by the pump 17 flows via the neutral circulation channel 16 to the end plate 15 and via the return channel 51 back to the tank 18. In the directional valve 36, the two branches 55, 56 of the bridge channel 54 are blocked hydraulically on the one hand by the hollow slide 81 of the flow control valve 24 and on the other hand by the sealing plug 88.

Wird allein der Steuerschieber 38 des zweiten Wegeventils 12 nach rechts bewegt in seine erste Arbeitsstellung 89, so unterbricht der Steuerschieber 38 den Neutralumlaufkanal 16. Die Pumpe fördert nun Druckmittel in den Zulaufkanal 19, das über die Öffnung 32 in der ersten Flanschfläche 29 in die Zulaufkammer 62 strömt. Von dort gelangt Druckmittel durch den Hohlschieber 81 hindurch und über die Meßblende 87 in die erste Konstantstrom-Kammer 63 und weiter über das erste Rückschlagventil 68 in die erste Versorgungskammer 43, sowie über die erste Motorkammer 45 zum ersten Motoranschluß 52. Die Größe dieses zum Motoranschluß 52 fließenden Konstantstroms kann von außen mit Hilfe der Verstelleinrichtung 79 durch Einstellen der Meßblende 87 variiert werden. Zugleich wird der über den Konstantstrom hinausgehende Reststrom in den Zweig 55 des Brückenkanals 54 gesteuert, wenn die Steuerkante 84 am Hohlschieber 81 die Verbindung von der Zulaufkammer 62 zur ersten Reststromkammer 59 aufsteuert. Dieser Reststrom gelangt vom Brückenkanal 54 weiter in die mittlere Umlaufkammer 41 und somit zu der stromabwärts liegenden öffnung 35 des Neutralumlaufkanals in der zweiten Flanschfläche 31 und weiter über den offenen Neutralumlaufkanal 16 im dritten Wegeventil 13 zurück zum Tank 18. Während also der erste Motoranschluß 52 mit einem Konstantstrom versorgt wird, fließt gleichzeitig der vom Verbraucher zurückkommende Druckmittelstrom vom zweiten Motoranschluß 53 über die zweite Motorkammer 46, die zweite Rücklaufkammer 48, den Querkanal 49 und den Rücklaufkanal 51 zum Tank 18.If the control spool 38 of the second directional control valve 12 is moved to the right into its first working position 89, the control spool 38 interrupts the neutral circulation channel 16. The pump now conveys pressure medium into the supply channel 19, which via the opening 32 in the first flange surface 29 into the supply chamber 62 streams. From there, pressure medium passes through the hollow slide 81 and via the measuring orifice 87 into the first constant-current chamber 63 and further via the first check valve 68 into the first supply chamber 43 and via the first motor chamber 45 to the first motor connection 52. The size of this for the motor connection 52 flowing constant current can be varied from the outside with the aid of the adjusting device 79 by adjusting the orifice 87. At the same time, the residual current going beyond the constant current into the branch 55 of the bridge channel 54 is controlled when the control edge 84 on the hollow slide 81 opens the connection from the inlet chamber 62 to the first residual current chamber 59. This residual flow passes from the bridge channel 54 into the middle circulation chamber 41 and thus to the downstream opening 35 of the neutral circulation channel in the second flange surface 31 and further via the open neutral circulation channel 16 in the third directional control valve 13 back to the tank 18. Thus, the first motor connection 52 is included is supplied with a constant current, the pressure medium flow coming back from the consumer flows simultaneously from the second motor connection 53 via the second motor chamber 46, the second Return chamber 48, the transverse channel 49 and the return channel 51 to the tank 18.

Wird der Steuerschieber 38 des zweiten Wegeventils 12 aus seiner Mittelstellung nach links bewegt in seine zweite Arbeitsstellung 91, so wird in entsprechender Weise nun der zweite Motoranschluß 53 mit einem Konstantstrom versorgt, während der erste Motoranschluß 52 zum Tank 18 entlastet wird. Der von der Zulaufkammer 62 über das Stromregelventil 24 in die erste Konstantstrom-Kammer 63 gelangende Konstantstrom fließt hierbei über die Querbohrung 65 und das zweite Rückschlagventil 69 nun in die zweite Versorgungskammer 44. Uber die ablaufseitige Öffnung 34 in der zweiten Flanschfläche 31 kann hierbei kein Druckmittel abströmen, da der stromabwärts liegende Abschnitt des Zulaufkanals 19 sowie der Versorgungskanal 23 zum dritten Wegeventil 13 hydraulisch blockiert sind. Auch in der zweiten Arbeitsstellung 91 fließt der vom Stromregelventil 24 über die Umlaufkammer 41 in den Neutralumlaufkanal 16 gesteuerte restliche Druckmittelstrom zum Tank 18 ab.If the control slide 38 of the second directional valve 12 is moved from its central position to the left into its second working position 91, then the second motor connection 53 is now supplied with a constant current in a corresponding manner, while the first motor connection 52 to the tank 18 is relieved. The constant current coming from the inlet chamber 62 via the flow control valve 24 into the first constant flow chamber 63 now flows through the transverse bore 65 and the second check valve 69 into the second supply chamber 44. No pressure medium can flow through the outlet 34 in the second flange surface 31 flow out, since the downstream section of the inlet channel 19 and the supply channel 23 to the third directional control valve 13 are blocked hydraulically. Also in the second working position 91, the remaining pressure medium flow controlled by the flow control valve 24 via the circulation chamber 41 into the neutral circulation channel 16 flows to the tank 18.

Wird das dritte Wegeventil 13 allein betätigt, so wird dessen zugeordneter Verbraucher ebenfalls mit einem Konstantstrom vom Stromregelventil 24 über den dritten Versorgungskanal 23 versorgt. Da hierbei der Neutralumlaufkanal 16 im dritten Wegeventil 13 unterbrochen wird und somit auch der Reststromkanal 28 hydraulisch blockiert ist, arbeitet das Stromregelventil 24 nun als 2Wege-Regelventil. Darüber hinaus können beide Wegeventile 12 und 13 auch gleichzeitig betätigt werden, wobei in an sich bekannter Weise zuerst der Verbraucher mit niedrigerem Lastdruck versorgt wird.If the third directional control valve 13 is actuated alone, its associated consumer is also supplied with a constant current from the flow control valve 24 via the third supply channel 23. Since the neutral circulation channel 16 in the third directional control valve 13 is interrupted and the residual flow channel 28 is also hydraulically blocked, the flow control valve 24 now works as a 2-way control valve. In addition, both directional control valves 12 and 13 can also be actuated simultaneously, the consumer being supplied with lower load pressure first in a manner known per se.

Die Figur 5 zeigt eine zweite Steuereinrichtung 100 mit einem erfindungsgemäßen zweiten Wegeventil 101, das sich vom zweiten Wegeventil 12 nach Figur 1 wie folgt unterscheidet, wobei für gleiche Teile auch gleiche Bezugszeichen verwendet werden:

  • Im zweiten Wegeventil 101 ist das Stromregelventil 24 nicht mehr in den Zulaufkanal 19, sondern in den davon abgehenden, stichförmigen Versorgungskanal 22 geschaltet. Auf diese Weise wird der Konstantstrom des Stromregelventils 24 lediglich dem zweiten Wegeventil 101 zugeführt.
FIG. 5 shows a second control device 100 with a second directional valve 101 according to the invention, which differs from the second directional valve 12 according to FIG. 1 as follows, the same reference numerals being used for the same parts:
  • In the second directional control valve 101, the flow control valve 24 is no longer connected to the inlet channel 19, but rather to the branch-shaped supply channel 22 extending therefrom. In this way, the constant flow of the flow control valve 24 is only supplied to the second directional valve 101.

Figur 6 zeigt nun einen teilweisen Längsschnitt durch das zweite Wegeventil 101, wobei sich dessen Gehäuse 102 vom Gehäuse 36 des zweiten Wegeventils 12 in einfacher Weise dadurch unterscheidet, daß der die Zulaufkammer 62 durchdringende Zulaufkanal 19 nun als eine durchgehende Bohrung ausgebildet ist, welche die beiden zugeordneten Öffnungen 32 bzw. 34 in den Flanschflächen 29 und 31 miteinander verbindet. Damit dieser Zulaufkanal 19 nun durchgehend ausgebildet werden kann, wird die Funktion der Querbohrung 65 im Gehäuse 36 nach Figur 2 nun von einem Konstantstrom-Kanal 103 übernommen, der beide Konstantstrom-Kammern 63, 64 miteinander verbindet. Dieser Kanal 103 liegt nun unterhalb der Hilfsbohrungen 57, 58.Figure 6 now shows a partial longitudinal section through the second directional valve 101, the housing 102 of which differs from the housing 36 of the second directional valve 12 in a simple manner in that the inlet channel 19 penetrating the inlet chamber 62 is now designed as a continuous bore which the two associated openings 32 and 34 in the flange surfaces 29 and 31 connects to each other. So that this inlet channel 19 can now be formed continuously, the function of the transverse bore 65 in the housing 36 according to FIG. 2 is now taken over by a constant current channel 103 which connects the two constant current chambers 63, 64 to one another. This channel 103 is now below the auxiliary bores 57, 58.

Die Wirkungsweise des zweiten Wegeventils 101 innerhalb der zweiten Steuereinrichtung 100 unterscheidet sich von derjenigen des zweiten Wegeventils 12 in der Steuereinrichtung 10 lediglich dadurch, daß nun der Konstantstrom des Stromregelventils 24 lediglich dem einzigen Wegeventil 101 zur Verfügung steht.The mode of operation of the second directional valve 101 within the second control device 100 differs from that of the second directional valve 12 in the control device 10 only in that the constant current of the flow control valve 24 is now only available to the single directional valve 101.

Die Figur 7 zeigt einen teilweisen Längsschnitt durch eine dritte Ausführungsform eines zweiten Wegeventils 110, daß sich von demjenigen nach Figur 6 wie folgt unterscheidet, wobei für gleiche Teile gleiche Bezugs-Zeichen verwendet werden: Das Wegeventil 110 hat ein Gehäuse 111, das sich vom Gehäuse 101 nur dadurch unterscheidet, daß der Konstantstrom-Kanal 103 entfällt. Anstelle des Verschlußstopfens 88 in der zweiten Hilfsbohrung 58 ist dort ein zweiter Ventileinsatz 112 eingebaut, so daß für beide Motoranschlüsse 52 bzw. 53 verschieden große Konstantströme einstellbar sind. Im übrigen entspricht die Wirkungsweise des Wegeventils 110 derjenigen des Wegeventils 101.FIG. 7 shows a partial longitudinal section through a third embodiment of a second directional control valve 110, which differs from that according to FIG. 6 as follows, the same reference symbols being used for the same parts: The directional control valve 110 has a housing 111 which is separate from the housing 101 differs only in that the constant current channel 103 is omitted. Instead of the sealing plug 88 in the second auxiliary bore 58, a second valve insert 112 is installed there, so that constant currents of different sizes can be set for both motor connections 52 and 53. Otherwise, the operation of the directional valve 110 corresponds to that of the directional valve 101.

Die aufgezeigten Wegeventile 12, 101, 110 lassen sich somit in vorteilhafter Weise durch geringfügige änderungen aus einem einzigen Grundgehäuse in einer Weise realisieren, daß zwei unterschiedliche Schaltungsanordnungen des Stromregelventils möglich sind und dessen Verstelleinrichtung von außen stets leicht zugänglich ist. Vorteilhaft ist ferner, daß die Wegeventile 12 und 101 von der gezeichneten Linksausführung leicht in eine Rechtsausführung umstellbar sind, Hobei die Zugänglichkeit der Verstelleinrichtung 79 erhalten bleibt. Wenn bei einer Rechtsausführung die Rückholeinrichtung 77 auf die dem Kolbenabschnitt 75 zugeordnete Stirnseite des Gehäuses zu liegen kommt, so kann auch der Ventileinsatz 78 in die zweite Hilfsbohrung 58 verlegt werden und die erste Hilfsbohrung 57 einen Verschlußstopfen 88 aufnehmen. Die Anordnung von Stromregelventil und Motoranschlüssen aufeinander gegenuberliegenden Seiten relativ vom Steuerschieber 38 ergibt im Bereich der Motoranschlüsse ausreichend Raum, um dort Zusatzventile wie z.B. Sperrventile im Gehäuse anzuordnen. Ferner führt die durchgehend ausgebildete Längsbohrung 37 sowie die Anordnung der Hilfsbohrungen 57, 58 zu einer kostengünstigen, leicht herstellbaren Lösung. Die Verwendung eines Ventileinsatzes mit Hohlschieber 81 ermöglicht eine kompakte, variable Bauweise und vermeidet Mehrfachführungen des Hohlschiebers. Bei derjenigen Variante, bei der nur einem einzigen Wegeventil ein Konstantstrom zur Verfügung gestellt werden soll, kann durch unterschiedliche Konstantströme für beide Motoranschlüsse die freie Wahl der Geschwindigkeit von Vorwärts-und Rückwärtsbewegung ermöglicht werden. Dies läßt sich durch einfaches Austauschen eines Verschlußstopfens durch einen zweiten Ventileinsatz erreichen.The directional valves 12, 101, 110 shown can thus be implemented in an advantageous manner by slight changes from a single basic housing in such a way that two different circuit arrangements of the flow control valve are possible and its adjustment device is always easily accessible from the outside. It is also advantageous that the directional control valves 12 and 101 can be easily changed from the drawn left-hand version to a right-hand version, with the accessibility of the adjusting device 79 being retained. If, in a right-hand version, the return device 77 comes to rest on the end face of the housing assigned to the piston section 75, the valve insert 78 can also be moved into the second auxiliary bore 58 and the first auxiliary bore 57 can accommodate a sealing plug 88. The arrangement of the flow control valve and the motor connections on opposite sides relative to the control slide 38 provides sufficient space in the area of the motor connections to arrange additional valves such as shut-off valves in the housing. Furthermore, the continuous longitudinal bore 37 and the arrangement of the auxiliary bores 57, 58 lead to an inexpensive, easy to manufacture solution. The use of a valve insert with hollow slide 81 enables a compact, variable construction and avoids multiple guiding of the hollow slide. In the variant in which only a single directional valve is to be provided with a constant current, different constant currents for both motor connections can be used to freely select the speed of forward and backward movement. This can be done by simply replacing one plug with another Reach valve insert.

Selbstverständlich sind an den gezeigten Ausführungsformen änderungen möglich, ohne vom Gedanken der Erfindung abzuweichen.Of course, changes can be made to the embodiments shown without departing from the spirit of the invention.

Claims (9)

1. Hydraulic directional control valve (12; 101; 110) for controlling a double-acting motor, having a housing (36; 102; 111) which accommodates in a longitudinal bore (37) an axially movable control slide valve (38) which, in a neutral postion, controls a neutral circulation channel (16) for a pressure medium flow flowing from the pump (17) to the tank (18) and separates two motor chambers (45, 46) in each case from a supply chamber (43, 44) and a return chamber (47, 48) and also closes the neutral circulation channel (16) in two working positions and connects one of the motor chamber to one of the supply chambers and the other motor chamber to one of the return chambers, and having a three-way flow regulating valve (24) which is adjustable from outside and is connected between a feed channel (19) arranged in the housing (36; 102; 111) and the supply chambers (43,44) and supplies the latter with a constant flow, whereas its residual flow is fed into the circulation chamber (41) of the neutral circulation channel (16), which circulation chamber (41) is located downstream and is a part of the symmetrically made neutral circulation channel (16) having three chambers (39, 41, 42), characterised in that two auxiliary bores (57, 58) running parallel to the longitudinal bore (37) are arranged in the housing (36; 102; 111), which auxiliary bores (57, 58) run from both end faces of the housing (36; 102; 111) into a centrally arranged feed chamber (62), that a fork-shaped, branching bridge channel (54) emerges from the centre circulation chamber (41), the two branches (55,56) of which bridge channel (54) enclose the feed chamber (62) in between them and in each case cross one of the auxiliary bores (57, 58), that, next to each branch (55, 56), a constant flow chamber (63, 64) is made in each auxiliary bore (57, 58), which constant flow chamber (63, 64) can in each case be connected to the allocated supply chamber (43, 44), and that at least one auxiliary bore (57) accommodates a valve insert (78) having a hollow slide valve (81), which valve insert (78) forms a part of the flow regulating valve (24) adjustable from outside, with the hollow slide valve controlling the connnection between the feed chamber (62), the constant flow chamber (63) and the residual flow chamber (59).
2. Directional control valve according to Claim 1, characterised in that the motor connections (52, 53) on the one hand and the auxiliary bores (57, 58) on the other hand are arranged on opposite sides in the housing (36) relative to the longitudinal bore (37) of the control slide valve (38).
3. Directional control valve according to CLaim 1 or 2, characterised in that the housing (36), in its two flange surfaces (29, 31), in each case has an opening (32, 34) allocated to the feed channel (19), that the feed channel (19) is interrupted between both openings (32, 34) and the opening (32) located upstream is connected to the feed chamber (62), whereas the opening (34) located on the discharge side is connected to a transverse bore (65) which connects the two constant flow chambers (63, 64) with one another.
4. Directional control valve according to Claim 3, characterised in that the transverse bore (65) is arranged between the longitudinal bore (37) and the auxiliary bores (57, 58) and parallel to the latter.
5. Directional control valve according to CLaim 1 or 2, characterised in that an opening (32, 34) allocated to the feed channel (19) is in each case located in the two flange surfaces (29, 31) of the housing (102), which openings (32, 34) are connected to one another by the feed channel (19) penetrating through the feed chamber (62).
6. Directional control valve according to Claim 5, characterised in that the two constant flow chambers (63, 64) are connected to one another via a channel (103) and one of the auxiliary bores (57) accommodates the valve insert (78), whereas the other auxiliary bore (58) is closed by a plug (88).
7. Directional control valve according to Claim 5, characterised in that a valve insert (78, 112) is arranged in each auxiliary bore (57, 58).
8. Directional control valve according to one of claims 1 to 7, characterised in that each supply chamber (43, 44) is safeguarded by a non-return valve (68, 69) which in each case is arranged between the control slide valve (38) and the auxiliary bore (57, 58) and which is located in particular in a blind bore (66, 67) which is open towards one flange surface (29).
9. Directional control valve according to one of claims 1 to 6, characterised in that the adjusting device (79) of the flow regulating valve (24) and the restoring device (77) of the control slide valve (38) are located on the same end face of the housing (36).
EP84102571A 1983-03-25 1984-03-09 Hydraulic directional valve for controlling a double-acting servo motor Expired EP0123088B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833310863 DE3310863A1 (en) 1983-03-25 1983-03-25 HYDRAULIC DIRECTIONAL VALVE FOR CONTROLLING A DOUBLE ACTING ENGINE
DE3310863 1983-03-25

Publications (2)

Publication Number Publication Date
EP0123088A1 EP0123088A1 (en) 1984-10-31
EP0123088B1 true EP0123088B1 (en) 1986-01-15

Family

ID=6194610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102571A Expired EP0123088B1 (en) 1983-03-25 1984-03-09 Hydraulic directional valve for controlling a double-acting servo motor

Country Status (4)

Country Link
US (1) US4537218A (en)
EP (1) EP0123088B1 (en)
JP (1) JPS59183102A (en)
DE (2) DE3310863A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0262403A (en) * 1988-08-29 1990-03-02 Kayaba Ind Co Ltd Control valve
JP2544803Y2 (en) * 1991-01-24 1997-08-20 豊興工業株式会社 Laminated pressure control valve
JP6338428B2 (en) * 2014-04-11 2018-06-06 Ｋｙｂ株式会社 Valve structure
DE102018204854A1 (en) * 2018-03-29 2019-10-02 Robert Bosch Gmbh Valve assembly with a main spool and two spools

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415265A (en) * 1966-03-03 1968-12-10 Parker Hannifin Corp Directional control valve with priority flow divider
DE1253539B (en) * 1966-03-04 1967-11-02 Bosch Gmbh Robert Control device with multiple valve for quantity limitation and switching of the pressure medium
DE1750096A1 (en) * 1968-03-29 1971-04-22 Parker Hannifin Corp Control valve
US3901264A (en) * 1972-03-06 1975-08-26 Gresen Manufacturing Co Adjustable flow control for hydraulic valves having high pressure main supply and controls fluid flow to cylinder and exhaust ports

Also Published As

Publication number Publication date
EP0123088A1 (en) 1984-10-31
DE3310863A1 (en) 1984-09-27
JPS59183102A (en) 1984-10-18
US4537218A (en) 1985-08-27
JPH0350124B2 (en) 1991-07-31
DE3460021D1 (en) 1986-02-27

Similar Documents

Publication Publication Date Title
DE3114437C2 (en) Pressure control valve
DE3634728C2 (en)
DE3537760C2 (en)
DE2514624A1 (en) CONTROL DEVICE FOR A HYDRAULICALLY OPERATED CONSUMER
DE2852382A1 (en) FLOW SYSTEM
DE3507121A1 (en) MULTI-WAY VALVE WITH PRESSURE SCALE
DE10027382A1 (en) Hydraulic control device
DE4396842C2 (en) Control valve assembly with electromagnetic metering pressure reducing valve
DE1550589A1 (en) Fluid flow regulator
DE3813020C2 (en) Device for controlling the feed of a hydraulic actuating device
DE2804045C2 (en)
DE3117815C2 (en)
EP0123088B1 (en) Hydraulic directional valve for controlling a double-acting servo motor
DE3422978C2 (en) Device for controlling a hydraulic actuating device
DE2349620C2 (en) Remote control system for a hydraulic power transmission device
DE3415621C2 (en) Hydraulic multi-way control valve
DE3603811C2 (en) Hydraulic directional valve
DE102008052338B3 (en) Hydrostatic adjustment unit for stepless adjustment of flow rate of hydraulic conveyor device, has servo system directed over permanent hydraulic connections that are guided from pressure level between control edges to low pressure level
DE3625058A1 (en) VALVE
DE3040041A1 (en) DISTRIBUTOR FOR A HYDRAULIC CIRCUIT
DE3222106C2 (en)
DE3308576C2 (en)
DE3629471A1 (en) Hydraulic control arrangement
DE3106532C2 (en)
DE3234820C2 (en) Hydraulic control device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19840309

AK Designated contracting states

Designated state(s): DE FR GB IT

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3460021

Country of ref document: DE

Date of ref document: 19860227

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980217

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980320

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990309

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990309

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010525

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021001