EP0519185B2 - Fluid pressure operated actuator - Google Patents

Fluid pressure operated actuator Download PDF

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Publication number
EP0519185B2
EP0519185B2 EP92107083A EP92107083A EP0519185B2 EP 0519185 B2 EP0519185 B2 EP 0519185B2 EP 92107083 A EP92107083 A EP 92107083A EP 92107083 A EP92107083 A EP 92107083A EP 0519185 B2 EP0519185 B2 EP 0519185B2
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EP
European Patent Office
Prior art keywords
longitudinal
cylinder
flange plate
working cylinder
cylinder liner
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 - Lifetime
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EP92107083A
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German (de)
French (fr)
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EP0519185A1 (en
EP0519185B1 (en
Inventor
Philippe Ducrettet
Christian . Tour
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • F15B15/1428Cylinders

Definitions

  • the invention is based on a pressure medium actuable Working cylinder according to the in the upper of claim 1 specified genus.
  • the working cylinder therefore requires a relatively large number of components and also results in a large number of sealing points, in particular the transition points from the tie rods loaded with high forces into the Cylinder covers are critical.
  • the working cylinder builds therefore relatively expensive, with the risk of leakage is relatively large.
  • a pressure fluid operated Working cylinder known in which the cylinder tube installed between two cylinder covers designed as a profile tube with external channels is that with the help of additional components for different functions, such as pressure medium Circulation channels or fastening channels can be used are.
  • a disadvantage of this cylinder is that the outer channels run across their entire Length must have a longitudinal slot, so that profiled components depending on the corresponding Function can be installed. This leads to one high construction costs and a risk of Leakage. It is also unfavorable that when using a outer channel as a pressure medium channel Sealing or pressure medium connection via the front cylinder cover must be made which also means the number of fluid-carrying Components is increased. Otherwise, there will be none Notes on installing a flange plate with directional valve given.
  • Cylinder sleeve has a transition opening from the channel into the Pressure chamber of the cylinder.
  • flange plate for mounting a Valve is not taught here.
  • the fluid pressure actuatable according to the invention has the advantage that he arranged a compact unit with integrated Pressure medium channels allowed, the danger leak pressure medium is particularly reduced.
  • the working cylinder comes with fewer components off, especially those with pressurization.
  • the working cylinder is easy to handle and versatile. It can be space-saving and thus produce inexpensively.
  • FIG. 1 An embodiment of the invention is in the Drawing shown and in the description below 1 shows a Perspective view of the pressure medium actuated Working cylinder in a simplified way
  • Figure 2 is a front view of the cylinder Figure 1 partially in longitudinal section
  • Figure 3 is a plan view of the working cylinder of Figure 2
  • Figure 4 a Side view according to A in Figure 2.
  • FIG. 1 shows a perspective, schematic Representation of a pressure-actuated working cylinder 10, for its explanation also on the Figures 2 to 4 is referred to.
  • the working cylinder 10 has a housing in the essentially tubular cylinder liner 11, on the outside of which a flange plate 12 is attached, which in turn is a flanged directional valve 13 wears.
  • the cylinder liner 11 has one through guide bore 14 in which a piston 15 is guided axially longitudinally.
  • a piston 15 is guided axially longitudinally.
  • the piston rod 16 is attached to a piston rod 16, which in a first, front cylinder cover 17 tight and is slidably guided and through the latter protrudes outside.
  • the first cylinder cover 17 is on the piston rod side in the guide bore 14 of the cylinder liner 11 used and axially fastened there and together with the piston 15 delimits a first front pressure chamber 18.
  • Cylinder cover 19 firmly and tightly installed and limited with the piston 15 a second pressure chamber 21.
  • the tubular cylinder liner particularly clearly 11 on its outer surface parallel to Four longitudinal struts 22 to 25 running along the longitudinal axis on, of which the two longitudinal struts 22, 23 as Guide elements for the flange plate 12 used will.
  • the longitudinal struts 22 to 25 are on the Outer circumference of the cylinder liner 11 evenly distributed so that they are in cross section the cylinder liner 11 seen on the corners of a Squares.
  • the longitudinal struts 22 to 25 are each in one piece in the manner of profile rails on the Molded outer surface of the cylinder liner 11, so that the cylinder liner 11 easily from a profile tube can be produced.
  • the outer surface of the cylinder liner 11 is essentially seen in cross section formed as an octagon, in which the vertical and horizontally lying four longitudinal surfaces 26 continuously and just go through while at the four sloping longitudinal surfaces 27 each in the middle the longitudinal struts 22 to 25 are integrally formed. Any of these Longitudinal struts 22 to 25 form an outward approximately semicircular guide surface 28, each over two roughly parallel to each other Guide surfaces 29, 31 in the oblique longitudinal surface 27 passes.
  • the two have axial end regions of each longitudinal bore 32 introduced into the face in the axial direction running blind holes 33, 34 on.
  • Longitudinal struts 22, 23 are in the threaded holes 33 and 34 respectively from the relevant end faces forth sealing plug 35 screwed in, so that the longitudinal bore 32 a first in the first longitudinal strut 22 Pressure medium channel 36 forms.
  • This first pressure medium channel 36 stands over an arranged in the cylinder liner 11 first oblique bore 37 with the second Pressure chamber 21 in connection.
  • the flange plate 12 on its underside two mounting grooves 41, 42 open on one side, the Shape of the outer contour of the longitudinal struts 21, 22 is precisely adjusted so that the flange plate 12 is flawless and axially displaceable on the longitudinal struts 21, 22 is guided.
  • the flange plate 12 will from one end of the cylinder liner 11 to the Longitudinal struts 22, 23 pushed on and in a predetermined Position with locking screws 43 locked.
  • the flange plate has in the locked position 12 such a position that the first pressure medium channel 36 in the longitudinal strut 22 via a first transition opening 44 (FIG. 2) and in the flange plate 12 extending transverse channels 45 with a first motor connection 46 in a flange 47 connection Has.
  • One in the flange surface 47 between the two Motor connections 46, 48 lying pump pressure connection 52 is connected to an inlet connection 53, which in a rear end face 54 the flange plate 12 is formed.
  • the two transfer openings 44, 51 between the flange plate 12 and the two Longitudinal struts 22, 23 are on the cylinder liner 11 sealed by suitable seals, so that on Transition of the pressure medium channels from the flange plate 12 in the cylinder liner 11 no pressure medium can lick outside.
  • FIG. 1 is in a simplified form with arrows the course of the pressure medium flow is given as he with a correspondingly switched directional valve 13 and 16 when the piston rod extends.
  • a serving to actuate the working cylinder 10 pressurized fluid is at the inlet connection 53 inserted into the flange plate 12 where it reaches the inlet connection 52 in the flange surface 47.
  • the pressure medium now flows in the directional control valve 13 itself from the pump pressure port 52 to the first Motor connection 46 in the flange surface 47, whereupon it through the flange plate 12 through the transverse channels 45 and the first transition opening 44 in the first Pressure medium channel 36 in the first longitudinal strut 22 flows.
  • the 5/2-way valve 13 switches.
  • the directional control valve 13 controls Pressure medium from the pump pressure connection 52 to second motor connection 48 and thus in the first, front pressure chamber 18, followed by that on the front pressure-loaded piston 15, the piston rod 16 drives in.
  • pressure medium becomes the second Pressure chamber 21 via the first motor connection 46 again controlled to the return port 56 and can escape through the exhaust caps 59.
  • the flange plate 12 is in perfect and captive manner guided on the cylinder liner 11 and can in their axial position adapted to the respective circumstances only by the two transfer openings 44 and 51 on the two longitudinal struts 22 or 23 are drilled accordingly.
  • the cylinder liner 11 can be done in a simple and inexpensive manner Manufacture way from a profile tube, the two Pressure medium channels 36 and 38 in any way in two adjacent longitudinal struts 22 up to 25 can be installed.
  • the oblique bores 37 and 39 can be manufactured in the profile tube easy to manufacture.
  • the flange plate 12 with directional valve 13 can be dismantled without the cylinder cover 17, 19 removed from the cylinder liner 11 Need to become.
  • the working cylinder 10 is therefore versatile and can be manufactured inexpensively.
  • the longitudinal struts 22 to 25 as integrated Components of the cylinder liner 11 take over Variety of functions; they are not just for guidance and mounting the flange plate 12, but also form pressure medium-carrying channels Control of the working cylinder 10. Furthermore, let them if necessary also for the function of tie rods Use if parts of the cylinder covers shown other types of covers can be used. Of course, are shown on the embodiment Changes possible without thinking to deviate from the invention.
  • the working cylinder is not for use as a pneumatic cylinder limited, but can also with hydraulic Pressure medium are operated.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem druckmittelbetätigbaren Arbeitszylinder nach der im Oberbegrifl des Anspruchs 1 naher angegebenen Gattung.The invention is based on a pressure medium actuable Working cylinder according to the in the upper of claim 1 specified genus.

Es ist schon ein solcher druckmittelbetätigbarer Arbeitszylinder aus der DE 37 06 952 A1 bekannt, bei dem ein den Arbeitszylinder steuerndes Wegeventil auf einer Flanschplatte montierbar ist, die auf zwei parallel verlaufenden, nebeneinanderliegenden Zugankern dieses Arbeitszylinders angeordnet ist. Um bei diesem Arbeitszylinder eine kompakte Bauweise zu erreichen, werden von den insgesamt vier Zugankern die beiden die Flanschplatte durchdringenden Zuganker hohl ausgebildet und als Druckmittelkanäle benutzt, über welche das von dem Wegeventil in die beiden Druckräume beiderseits des Kolbens gesteuerte Druckmittel geführt wird. Bei diesem Arbeitszylinder ist nun von Nachteil, daß hier Druckmittelkanäle extern vom eigentlichen Zylinderrohr geführt werden und Übertrittsöffnungen für das Druckmittel vom hohlen Zuganker im Deckelbereich vorgesehen werden müssen, wobei eine gegenüber den Zylinderdeckeln zusätzliche Aufnahmeplatte erforderlich ist. Der Arbeitszylinder benötigt daher relativ viele Bauelemente und ergibt zudem eine Vielzahl von Dichtstellen, wobei insbesondere die Übergangstellen von den mit hohen Kräften belasteten Zugankern in die Zylinderdeckel kritisch sind. Der Arbeitszylinder baut daher relativ aufwendig, wobei das Risiko von Leckverlusten verhältnismäßig groß ist.It is already such a pressure fluid operated Working cylinder known from DE 37 06 952 A1, at a directional control valve that controls the working cylinder can be mounted on a flange plate on two parallel, adjacent tie rods this working cylinder is arranged. Around a compact design for this working cylinder can be reached from a total of four tie rods the two penetrating the flange plate Tie rods hollow and as pressure medium channels used, via which the from the directional valve in the controlled two pressure chambers on both sides of the piston Pressure medium is guided. With this working cylinder is now a disadvantage that here pressure medium channels be guided externally from the actual cylinder tube and transfer openings for the pressure medium from hollow tie rods can be provided in the lid area need, one opposite the cylinder covers additional mounting plate is required. The working cylinder therefore requires a relatively large number of components and also results in a large number of sealing points, in particular the transition points from the tie rods loaded with high forces into the Cylinder covers are critical. The working cylinder builds therefore relatively expensive, with the risk of leakage is relatively large.

Ferner ist aus der DE 29 18 294 C2 ein druckmittelbetätigbarer Arbeitszylinder bekannt, bei dem das zwischen zwei Zylinderdeckeln eingebaute Zylinderrohr als Profilrohr mit außenliegenden Kanälen ausgebildet ist, die mit Hilfe zusätzlicher Bauelemente für unterschiedliche Funktionen, wie druckmittelführende Umlaufkanäle oder Befestigungskanäle verwendbar sind. Von Nachteil bei diesem Arbeitszylinder ist, daß die außenliegenden Kanäle über ihre gesamte Länge einen Längsschlitz aufweisen müssen, so daß profilierte Bauelemente je nach der entsprechenden Funktion einbaubar sind. Dies führt zu einem hohen Bauaufwand und zu einer Gefahr von Leckage. Ungünstig ist ferner, daß bei Benutzung eines außenliegenden Kanals als Druckmittelkanal eine Abdichtung oder Druckmittelverbindung über die stirnseitigen Zylinderdeckel hergestellt werden muß, wodurch auch die Anzahl der druckmittelführenden Bauelemente erhöht wird. Im übrigen wird hier kein Hinweis zum Anbau einer Flanschplatte mit Wegeventil gegeben.Furthermore, from DE 29 18 294 C2 is a pressure fluid operated Working cylinder known in which the cylinder tube installed between two cylinder covers designed as a profile tube with external channels is that with the help of additional components for different functions, such as pressure medium Circulation channels or fastening channels can be used are. A disadvantage of this cylinder is that the outer channels run across their entire Length must have a longitudinal slot, so that profiled components depending on the corresponding Function can be installed. This leads to one high construction costs and a risk of Leakage. It is also unfavorable that when using a outer channel as a pressure medium channel Sealing or pressure medium connection via the front cylinder cover must be made which also means the number of fluid-carrying Components is increased. Otherwise, there will be none Notes on installing a flange plate with directional valve given.

Weiterhin ist aus der FR-A-2 573 490 ein druckmittelbetätigbarer Arbeitszylinder bekannt, bei dem eine Zylinderbuchse zwischen zwei Deckeln angeordnet ist und durch Zuganker verspannt wird. Um bei diesem für mobile Einsatzzwecke vorgesehenen Arbeitszylinder eine Beschädigung von extern geführten Druckmittelleitungen zu vermeiden und die Leckagegefahr zu senken, sind beide Druckmittelanschlüsse des doppeltwirkenden Arbeitszylinders an denselben ortsfest gelagerten Deckel herangeführt, wobei die Druckmittelbeaufschlagung der von dem Deckel abgewandten Kolbenseite über einen in der Zylinderbuchse integrierten Kanal erfolgt. An der Zylinderbuchse sind an deren Außenseite mehrere parallel zur Längsachse verlaufende, einstückig mit ihr ausgebildete Längsstreben angeformt, die für die Funktionen als Zuganker und als Druckmittelkanal verwendbar sind. In einer Ausführungsform, bei welcher der Zuganker konzentrisch im Kanal verläuft, weist die Zylinderbuchse eine Übertrittsöffnung vom Kanal in den Druckraum des Zylinders auf. Eine auf dem Arbeitszylinder verschiebbar angeordnete Flanschplatte zum Anbau eines Ventils wird hier nicht gelehrt.Furthermore, from FR-A-2 573 490 pressure-operated cylinder known, in which a cylinder liner is arranged between two lids and is tensioned by tie rods. In order for this for mobile Working cylinders provided damage to be avoided by externally guided pressure medium lines and both are reducing the risk of leakage Pressure medium connections of the double-acting working cylinder brought up to the same stationary lid, whereby the pressurization of those facing away from the cover Piston side via an integrated in the cylinder liner Channel takes place. There are others on the cylinder liner Outside several parallel to the longitudinal axis, integrally formed with it formed longitudinal struts, the for the functions as tie rod and pressure medium channel are usable. In an embodiment in which the The tie rod runs concentrically in the channel Cylinder sleeve has a transition opening from the channel into the Pressure chamber of the cylinder. One on the cylinder slidably arranged flange plate for mounting a Valve is not taught here.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße, druckmittelbetätigbare Arbeitszylinder mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß er eine kompakte Baueinheit mit integriert angeordneten Druckmittelkanälen erlaubt, wobei die Gefahr von Leckdruckmittel besonders verringert wird. Der Arbeitszylinder kommt mit weniger Bauelementen aus, insbesondere solchen mit Druckbeaufschlagung. Zudem ist der Arbeitszylinder leicht handhabbar und vielseitig anwendbar. Er läßt sich platzsparend und damit kostengtünstig herstellen.The fluid pressure actuatable according to the invention Working cylinder with the characteristic features the main claim has the advantage that he arranged a compact unit with integrated Pressure medium channels allowed, the danger leak pressure medium is particularly reduced. The working cylinder comes with fewer components off, especially those with pressurization. In addition, the working cylinder is easy to handle and versatile. It can be space-saving and thus produce inexpensively.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen druckmittelbetätigbaren Arbeitszylinders möglich. Besonders günstig ist eine Bauweise nach Anspruch 2, wodurch sich ein relativ einfaches und kostengünstiges Profilrohr für den Arbeitszylinder verwenden läßt. Ferner ist es günstig, wenn der Arbeitszylinder gemäß Anspruch 3 ausgebildet wird, so daß die Längsstreben bei Bedarf auch die Funktion von Zugankern übernehmen können. Ferner ist es vorteilhaft, wenn der Arbeitszylinder gemäß den Ansprüchen 4 und 9 ausgebildet, wird, wodurch eine einwandfreie Führung und Halterung der Flanschplatte erzielbar ist. Außerdem ist es günstig, wenn gemäß Anspruch 5 die Anschlüsse für Zulauf und Rücklauf unmittelbar an der Flanschplatte ausgebildet werden. Weiter vorteilhafte Ausgestaltungen ergeben sich aus den übrigen Ansprüchen, der Beschreibung sowie der Zeichnung.By those listed in the subclaims Measures are advantageous training and Improvements to that specified in claim 1 working cylinder actuated by pressure medium possible. A construction according to claim is particularly favorable 2, making it a relatively simple and inexpensive Use profile tube for the working cylinder leaves. It is also advantageous if the working cylinder is formed according to claim 3, so that the Longitudinal struts can also function as tie rods if required can take over. It is also advantageous if the working cylinder according to the claims 4 and 9 is formed, making a flawless Guide and bracket of the flange plate is achievable. It is also beneficial if according to Claim 5 the connections for inlet and return be formed directly on the flange plate. Further advantageous configurations result from the other claims, the description and the drawing.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert Es zeigen Figur 1 eine perspektivische Darstellung des druckmittel betätigbaren Arbeitszylinders in einer vereinfachten Weise, Figur 2 eine Vorderansicht des Arbeitszylinders nach Figur 1 teilweise im Längsschnitt, Figur 3 eine Draufsicht des Arbeitszylinders nach Figur 2 und Figur 4 eine Seitenansicht nach A in Figur 2.An embodiment of the invention is in the Drawing shown and in the description below 1 shows a Perspective view of the pressure medium actuated Working cylinder in a simplified way Figure 2 is a front view of the cylinder Figure 1 partially in longitudinal section, Figure 3 is a plan view of the working cylinder of Figure 2 and Figure 4 a Side view according to A in Figure 2.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Die Figur 1 zeigt in perspektivischer, schematischer Darstellung einen druckmittelbetätigbaren Arbeitszylinder 10, zu dessen Erläuterung auch auf die Figuren 2 bis 4 Bezug genommen wird.Figure 1 shows a perspective, schematic Representation of a pressure-actuated working cylinder 10, for its explanation also on the Figures 2 to 4 is referred to.

Der Arbeitszylinder 10 weist als Gehäuse eine im wesentlichen rohrförmig ausgebildete Zylinderbuchse 11 auf, an deren Außenseite eine Flanschplatte 12 angebaut ist, die ihrerseits ein angeflanschtes Wegeventil 13 trägt. Die Zylinderbuchse 11 weist eine durchgehende Führungsbohrung 14 auf, in welcher ein Kolben 15 axial längsverschiebbar geführt ist. Am Kolben 15 ist eine Kolbenstange 16 befestigt, welche in einem ersten, vorderen Zylinderdeckel 17 dicht und gleitend geführt ist und durch letzteren hindurch nach außen ragt. Der erste Zylinderdeckel 17 ist kolbenstangenseitig in die Führungsbohrung 14 der Zylinderbuchse 11 eingesetzt und dort axial befestigt und begrenzt zusammen mit dem Kolben 15 einen ersten, vorderen Druckraum 18. Auf der Rückseite der Zylinderbuchse 11 ist in die Führungsbohrung 14 ein zweiter Zylinderdeckel 19 fest und dicht eingebaut und begrenzt mit dem Kolben 15 einen zweiten Druckraum 21. Wie die Figur 1 vor allem in Verbindung mit Figur 4 besonders deutlich zeigt, weist die rohrförmige Zylinderbuchse 11 an ihrer Außenoberfläche parallel zur Längsachse verlaufend vier Längsstreben 22 bis 25 auf, von denen die beiden Längsstreben 22, 23 als Führungselemente für die Flanschplatte 12 verwendet werden. Die Längsstreben 22 bis 25 sind auf dem Außenumfang der Zylinderbuchse 11 gleichmäßig verteilt angeordnet, so daß sie im Querschnitt durch die Zylinderbuchse 11 gesehen auf den Ecken eines Quadrates liegen. Die Längsstreben 22 bis 25 sind jeweils einstückig nach Art von Profilschienen an der Außenoberfläche der Zylinderbuchse 11 angeformt, so daß die Zylinderbuchse 11 leicht aus einem Profilrohr herstellbar ist. Die Außenoberfläche der Zylinderbuchse 11 ist im Querschnitt gesehen im wesentlichen als Achteck ausgebildet, bei dem die vertikal und horizontal liegenden vier Längsflächen 26 ununterbrochen und eben durchgehen, während an den vier schräg liegenden Längsflächen 27 jeweils mittig die Längsstreben 22 bis 25 angeformt sind. Jede dieser Längsstreben 22 bis 25 bildet nach außen hin eine etwa halbkreisförmige Führungsfläche 28, die jeweils über zwei etwa parallel zueinander verlaufende Führungsflächen 29, 31 in die schräge Längsfläche 27 übergeht.The working cylinder 10 has a housing in the essentially tubular cylinder liner 11, on the outside of which a flange plate 12 is attached, which in turn is a flanged directional valve 13 wears. The cylinder liner 11 has one through guide bore 14 in which a piston 15 is guided axially longitudinally. At the Piston 15 is attached to a piston rod 16, which in a first, front cylinder cover 17 tight and is slidably guided and through the latter protrudes outside. The first cylinder cover 17 is on the piston rod side in the guide bore 14 of the cylinder liner 11 used and axially fastened there and together with the piston 15 delimits a first front pressure chamber 18. On the back of the cylinder liner 11 is a second in the guide bore 14 Cylinder cover 19 firmly and tightly installed and limited with the piston 15 a second pressure chamber 21. Like the figure 1 especially in connection with figure 4 shows the tubular cylinder liner particularly clearly 11 on its outer surface parallel to Four longitudinal struts 22 to 25 running along the longitudinal axis on, of which the two longitudinal struts 22, 23 as Guide elements for the flange plate 12 used will. The longitudinal struts 22 to 25 are on the Outer circumference of the cylinder liner 11 evenly distributed so that they are in cross section the cylinder liner 11 seen on the corners of a Squares. The longitudinal struts 22 to 25 are each in one piece in the manner of profile rails on the Molded outer surface of the cylinder liner 11, so that the cylinder liner 11 easily from a profile tube can be produced. The outer surface of the cylinder liner 11 is essentially seen in cross section formed as an octagon, in which the vertical and horizontally lying four longitudinal surfaces 26 continuously and just go through while at the four sloping longitudinal surfaces 27 each in the middle the longitudinal struts 22 to 25 are integrally formed. Any of these Longitudinal struts 22 to 25 form an outward approximately semicircular guide surface 28, each over two roughly parallel to each other Guide surfaces 29, 31 in the oblique longitudinal surface 27 passes.

Jede der Längsstreben 22 bis 25, die über die gesamte Länge der Zylinderbuchse 11 verlaufen, weist eine durchgehende Längsbohrung 32 auf. Die beiden axialen Endbereiche jeder Längsbohrung 32 weisen stirnseitig in sie eingebrachte, in axialer Richtung verlaufende, sacklochartige Gewindebohrungen 33, 34 auf. Bei den als Führungselemente benutzten Längsstreben 22, 23 sind in die Gewindebohrungen 33 bzw. 34 jeweils von den betreffenden Stirnseiten her Dichtstopfen 35 eingeschraubt, so daß die Längsbohrung 32 in der ersten Längsstrebe 22 einen ersten Druckmittelkanal 36 bildet. Dieser erste Druckmittelkanal 36 steht über eine in der Zylinderbuchse 11 angeordnete erste Schrägbohrung 37 mit dem zweiten Druckraum 21 in Verbindung. In entsprechender Weise ist in der zweiten Längsstrebe 23 ein zweiter Druckmittelkanal 38 ausgebildet, der über eine zweite Schrägbohrung 39, welche im Bereich des ersten Zylinderdeckels 17 liegt, mit dem ersten, vorderen Druckraum 18 verbunden ist. Die beiden Schrägbohrungen 37, 39 lassen sich in der profilierten Zylinderbuchse 11 einfach herstellen und bilden sogenannte Übertrittsöffnungen zu den beiden Druckräumen beiderseits des Kolbens 15.Each of the longitudinal struts 22 to 25, which over the entire The length of the cylinder liner 11 extends a continuous longitudinal bore 32. The two have axial end regions of each longitudinal bore 32 introduced into the face in the axial direction running blind holes 33, 34 on. In the used as guide elements Longitudinal struts 22, 23 are in the threaded holes 33 and 34 respectively from the relevant end faces forth sealing plug 35 screwed in, so that the longitudinal bore 32 a first in the first longitudinal strut 22 Pressure medium channel 36 forms. This first pressure medium channel 36 stands over an arranged in the cylinder liner 11 first oblique bore 37 with the second Pressure chamber 21 in connection. In a similar way is a second in the second longitudinal strut 23 Pressure medium channel 38 formed, the second Oblique bore 39, which in the area of the first Cylinder cover 17 lies with the first, front Pressure chamber 18 is connected. The two oblique holes 37, 39 can be in the profiled cylinder liner 11 simply manufacture and form so-called Transfer openings to the two pressure rooms on both sides the piston 15.

Wie die Figur 1 mit Figur 4 vor allem deutlich zeigt, weist die Flanschplatte 12 an ihrer Unterseite zwei einseitig offene Halterungsnuten 41, 42 auf, deren Form der Außenkontur der Längsstreben 21, 22 genau angepaßt ist, so daß die Flanschplatte 12 einwandfrei und axial längsverschieblich auf den Längstreben 21, 22 geführt ist. Die Flanschplatte 12 wird von einer Stirnseite der Zylinderbuchse 11 her auf die Längsstreben 22, 23 aufgeschoben und in einer vorbestimmten Stellung durch Sicherungsschrauben 43 arretiert. Wie Figur 4 näher zeigt, verlaufen die Mittelebenen der beiden Halterungsnuten 41, 42 senkrecht zueinander, so daß die Flanschplatte 12 die Längsstreben 22, 23 hintergreift und somit in radialer Richtung unverlierbar auf der Zylinderbuchse 11 gehalten ist. In der arretierten Lage hat die Flanschplatte 12 eine solche Stellung, daß der erste Druckmittelkanal 36 in der Längsstrebe 22 über eine erste Übertrittsöffnung 44 (Figur 2) und in der Flanschplatte 12 verlaufende Querkanäle 45 mit einem ersten Motoranschluß 46 in einer Flanschfläche 47 Verbindung hat. Ein in der Flanschfläche 47 zwischen den beiden Motoranschlüssen 46, 48 liegender Pumpendruckanschluß 52 steht mit einem Zulauf-Anschluß 53 in Verbindung, welcher in einer rückwärtigen Stirnseite 54 der Flanschplatte 12 ausgebildet ist. Bei dem Arbeitszylinder nach den Figuren 2 bis 4 ist in diesem Zulauf-Anschluß 53 zusätzlich ein Winkelstutzen 55 eingeschraubt, der in Figur 1 einfachheitshalber nicht dargestellt ist. Ferner sind in der Flanschfläche 47 zwei Rücklaufanschlüsse 56, 57 angeordnet, von denen einfachheitshalber in Figur 1 lediglich die Verbindung vom Rücklaufanschluß 56 zu einem in der Seitenwand der Flanschplatte 12 liegenden Ablaufanschluß 58 dargestellt ist. Wie insbesondere Figur 3 näher zeigt, sind entsprechend den beiden Rücklaufanschlüssen 56, 57 auch zwei Ablaufanschlüsse vorhanden, in die jeweils eine Abluftkappe 59 geschraubt ist. Die beiden Übertrittsöffnungen 44, 51 zwischen der Flanschplatte 12 und den beiden Längsstreben 22, 23 an der Zylinderbuchse 11 sind durch geeignete Dichtungen abgedichtet, so daß am Übergang der Druckmittelkanäle von der Flanschplatte 12 in die Zylinderbuchse 11 kein Druckmittel nach außen lecken kann.As Figure 1 with Figure 4 above all clearly shows, the flange plate 12 on its underside two mounting grooves 41, 42 open on one side, the Shape of the outer contour of the longitudinal struts 21, 22 is precisely adjusted so that the flange plate 12 is flawless and axially displaceable on the longitudinal struts 21, 22 is guided. The flange plate 12 will from one end of the cylinder liner 11 to the Longitudinal struts 22, 23 pushed on and in a predetermined Position with locking screws 43 locked. As FIG. 4 shows in more detail, the middle planes run of the two mounting grooves 41, 42 vertically to each other, so that the flange plate 12 Longitudinal struts 22, 23 engage behind and thus in a radial Direction captively held on the cylinder liner 11 is. The flange plate has in the locked position 12 such a position that the first pressure medium channel 36 in the longitudinal strut 22 via a first transition opening 44 (FIG. 2) and in the flange plate 12 extending transverse channels 45 with a first motor connection 46 in a flange 47 connection Has. One in the flange surface 47 between the two Motor connections 46, 48 lying pump pressure connection 52 is connected to an inlet connection 53, which in a rear end face 54 the flange plate 12 is formed. At the working cylinder according to Figures 2 to 4 is in this inlet connection 53 additionally screwed in an elbow 55 not shown in FIG. 1 for the sake of simplicity is. Furthermore, there are two in the flange surface 47 Return connections 56, 57 arranged, of which For the sake of simplicity, only the connection in FIG. 1 from the return port 56 to one in the side wall the flange plate 12 lying drain connection 58 is shown. As in particular Figure 3 closer shows are corresponding to the two return connections 56, 57 there are also two drain connections, screwed into each exhaust cap 59 is. The two transfer openings 44, 51 between the flange plate 12 and the two Longitudinal struts 22, 23 are on the cylinder liner 11 sealed by suitable seals, so that on Transition of the pressure medium channels from the flange plate 12 in the cylinder liner 11 no pressure medium can lick outside.

Die Wirkungsweise des Arbeitszylinders 10 wird wie folgt erläutert, wobei vor allem auf die Figuren 1 und 2 Bezug genommen wird:The operation of the working cylinder 10 is explained as follows, with particular reference to FIGS and 2 is referred to:

In der Figur 1 ist in vereinfachter Form mit Pfeilen der Verlaufder Druckmittelströmung angegeben, wie er sich bei entsprechend geschaltetem Wegeventil 13 und bei ausfahrender Kolbenstange 16 ergibt. Ein zum Betätigen des Arbeitszylinders 10 dienendes, unter Druck stehende Druckmittel wird am Zulaufanschluß 53 in die Flanschplatte 12 eingeführt, wo sie zum Zulauf-Anschluß 52 in der Flanschfläche 47 gelangt. Im Wegeventil 13 selbst strömt nun das Druckmittel von dem Pumpendruck-Anschluß 52 zum ersten Motoranschluß 46 in die Flanschfläche 47, worauf es durch die Flanschplatte 12 durch die Querkanäle 45 und die erste Übertrittsöffnung 44 in den ersten Druckmittelkanal 36 in der ersten Längsstrebe 22 strömt. Von dort gelangt es über eine erste Schrägbohrung 37 in den zweiten Druckraum 21 auf die Rückseite des Kolbens 15, so daß der sich dort aufbauende Druck über den Kolben 15 die Kolbenstange 16 nach außen verschiebt. Gleichzeitig muß aus dem vorderen Druckraum 18 Druckmittel entweichen. Dies geschieht dadurch, daß der erste Druckraum 18 über die zweite Schrägbohrung 39 mit dem zweiten Druckmittelkanal 38 in der zweiten Längsstrebe 23 verbunden wird. Von dort kann Druckmittel über die zweite Übertrittsöffnung 51 in die Flanschplatte 12 gelangen und über deren Querkanäle 49 zum zweiten Motoranschluß 48 strömen. Das abströmende Druckmittel im zweiten Motoranschluß 48 gelangt durch das Wegeventil 13 hindurch zu den Rücklaufanschlüssen 56, 57 und kann anschließend über den Ablaufanschluß 58 und die Abluftkappe 59 ins Freie gelangen.In Figure 1 is in a simplified form with arrows the course of the pressure medium flow is given as he with a correspondingly switched directional valve 13 and 16 when the piston rod extends. A serving to actuate the working cylinder 10, pressurized fluid is at the inlet connection 53 inserted into the flange plate 12 where it reaches the inlet connection 52 in the flange surface 47. The pressure medium now flows in the directional control valve 13 itself from the pump pressure port 52 to the first Motor connection 46 in the flange surface 47, whereupon it through the flange plate 12 through the transverse channels 45 and the first transition opening 44 in the first Pressure medium channel 36 in the first longitudinal strut 22 flows. From there it arrives via a first one Inclined bore 37 in the second pressure chamber 21 the back of the piston 15, so that the there building pressure over the piston 15 the piston rod 16 moves outwards. At the same time 18 pressure medium escape from the front pressure chamber. This happens because the first pressure chamber 18 via the second oblique bore 39 with the second pressure medium channel 38 in the second longitudinal strut 23 is connected. From there, pressure medium via the second transition opening 51 into the flange plate 12 arrive and through their transverse channels 49 flow to the second motor connection 48. The outflow Pressure medium arrives in the second motor connection 48 through the directional valve 13 to the return connections 56, 57 and can then over the drain port 58 and the exhaust cap 59 ins Get free.

Soll die Kolbenstange 16 am Arbeitszylinder 10 eingefahren werden, so wird das 5/2-Wegeventil 13 umgeschaltet. Das Wegeventil 13 steuert dann Druckmittel vom Pumpendruck-Anschluß 52 zum zweiten Motoranschluß 48 und somit in den ersten, vorderen Druckraum 18, worauf der auf der Vorderseite druckbelastete Kolben 15 die Kolbenstange 16 einfährt. Gleichzeitig wird Druckmittel aus dem zweiten Druckraum 21 über den ersten Motoranschluß 46 wiederum zum Rücklaufanschluß 56 gesteuert und kann damit über die Abluftkappen 59 entweichen.If the piston rod 16 on the working cylinder 10 are retracted, the 5/2-way valve 13 switched. The directional control valve 13 then controls Pressure medium from the pump pressure connection 52 to second motor connection 48 and thus in the first, front pressure chamber 18, followed by that on the front pressure-loaded piston 15, the piston rod 16 drives in. At the same time, pressure medium becomes the second Pressure chamber 21 via the first motor connection 46 again controlled to the return port 56 and can escape through the exhaust caps 59.

Bei vorliegendem Arbeitszylinder 10 liegen somit sämtliche druckbeaufschlagten Kanäle innerhalb weniger Bauelemente, wozu im einzelnen das Wegeventil 13, die Flanschplatte 12 und die Zylinderbuchse 11 zählen. Die Gefahr, daß Leckdruckmittel austritt, wird damit äußerst niedrig gehalten. Die Flanschplatte 12 ist in einwandfreier und unverlierbarer Weise an der Zylinderbuchse 11 geführt und kann in ihrer axialen Lage an die jeweiligen Gegebenheiten angepaßt werden, indem lediglich die beiden Übertrittsöfnungen 44 und 51 an den beiden Längsstreben 22 bzw. 23 entsprechend gebohrt werden. Die Zylinderbuchse 11 läßt sich in einfacher und kostengünstiger Weise aus einem Profilrohr herstellen, wobei die beiden Druckmittelkanäle 36 und 38 in beliebiger Weise in zwei nebeneinanderliegenden Längsstreben 22 bis 25 einbaubar sind. Die Schrägbohrungen 37 und 39 lassen sich dabei im Profilrohr fertigungstechnisch leicht herstellen. Die Flanschplatte 12 mit Wegeventil 13 läßt sich demontieren, ohne daß die Zylinderdeckel 17, 19 aus der Zylinderbuchse 11 entfernt werden müssen. Der Arbeitszylinder 10 ist daher vielseitig anwendbar und läßt sich kostengünstig herstellen. Die Längsstreben 22 bis 25 als integrierte Bauteile der Zylinderbuchse 11 übernehmen eine Vielzahl von Funktionen; sie dienen nicht nur zur Führung und Halterung der Flanschplatte 12, sondern bilden zugleich auch druckmittelführende Kanäle zur Steuerung des Arbeitszylinders 10. Ferner lassen sie sich bei Bedarf auch für die Funktion von Zugankern verwenden, wenn ansteile der gezeichneten Zylinderdeckel andere Deckelbauarten verwendet werden. Selbestverständlich sind an der gezeigten Ausführungsform Änderungen möglich, ohne vom Gedanken der Erfindung abzuweichen. Der Arbeitszylinder ist nicht auf eine Anwendung als Pneumatikzylinder begrenzt, sondern kann auch mit hydraulischem Druckmittel betrieben werden.In the present cylinder 10 are thus all pressurized channels within a few Components, including the directional valve 13, the flange plate 12 and the cylinder liner Count 11. The risk that leak pressure medium escapes is kept extremely low. The flange plate 12 is in perfect and captive manner guided on the cylinder liner 11 and can in their axial position adapted to the respective circumstances only by the two transfer openings 44 and 51 on the two longitudinal struts 22 or 23 are drilled accordingly. The cylinder liner 11 can be done in a simple and inexpensive manner Manufacture way from a profile tube, the two Pressure medium channels 36 and 38 in any way in two adjacent longitudinal struts 22 up to 25 can be installed. The oblique bores 37 and 39 can be manufactured in the profile tube easy to manufacture. The flange plate 12 with directional valve 13 can be dismantled without the cylinder cover 17, 19 removed from the cylinder liner 11 Need to become. The working cylinder 10 is therefore versatile and can be manufactured inexpensively. The longitudinal struts 22 to 25 as integrated Components of the cylinder liner 11 take over Variety of functions; they are not just for guidance and mounting the flange plate 12, but also form pressure medium-carrying channels Control of the working cylinder 10. Furthermore, let them if necessary also for the function of tie rods Use if parts of the cylinder covers shown other types of covers can be used. Of course, are shown on the embodiment Changes possible without thinking to deviate from the invention. The working cylinder is not for use as a pneumatic cylinder limited, but can also with hydraulic Pressure medium are operated.

Claims (11)

  1. Working cylinder (10) which can be actuated by a pressure medium,
    a) having a substantially tubular configuration of cylinder liner (11), which accommodates a piston (15) guided so that it slides in the axial direction and which is closed at both end surfaces by cylinder covers (17, 19) of which at least one is penetrated by a piston rod (16),
    b) having a plurality of guide elements (22 to 25), which extend outside the cylinder liner and parallel to its longitudinal centre line, which are distributed substantially uniformly around its periphery and of which two (22, 23) adjacent guide elements act as supports for a flange plate (12) which can be displaced in the longitudinal direction and on which a directional valve controlling the working cylinder can be attached,
    c) for which purpose the two guide elements carrying the flange plate have a hollow configuration and have transfer openings (37, 39, 44, 51) in the region of the flange plate and the cylinder covers so that pressure medium can be directed from the directional valve into the pressure spaces (18, 21) on both sides of the piston,
    characterized in that
    d) the guide elements are configured as longitudinal spurs (22, 23) of the cylinder liner (11), integral with it and extending on the outside thereof parallel to the longitudinal centre line,
    e) in that of the longitudinal spurs (22 to 25) formed integrally with the cylinder liner (11), the two adjacent longitudinal spurs (22, 23) have the guide surfaces (28, 29, 31) holding the flange plate (12), which is pushed on in the longitudinal direction, on the cylinder liner (11) so that it is held captive
    f) and in that the transfer openings (37, 39) from the two longitudinal spurs (22, 23) serving for the mounting to the two pressure spaces (18, 21) are arranged in the cylinder liner (11).
  2. Working cylinder according to Claimÿ1, characterized in that the cylinder liner (11) is configured as an extruded part in the form of a profiled tube which has on its outside, viewed in cross-section, four longitudinal spurs (22, 23, 24, 25) distributed at the corners of a rectangle, which longitudinal spurs (22, 23, 24, 25) are arranged, in particular, at the corners of a square and each have a through longitudinal hole (32).
  3. Working cylinder according to Claimÿ2, characterized in that the end regions of the longitudinal holes (32) in the longitudinal spurs (22 to 25) are in each case configured as holes (33, 34) threaded from the ends of the cylinder liner (11).
  4. Working cylinder according to one of Claimsÿ1 to 3, characterized in that the retention grooves (41, 42), associated with the two longitudinal spurs (22, 23), in the flange plate (12) are open at one end and are configured in such a way that the flange plate (12) is held radially captive on the cylinder liner (11).
  5. Working cylinder according to one of Claimsÿ1 to 4, characterized in that the connections for the supply (53) and the return (58) are configured on the flange plate (12).
  6. Working cylinder according to one of Claimsÿ2 to 5, characterized in that the cylinder liner (11) has the shape in cross-section of a substantially regular octagon at the outside, the longitudinal spurs (22 to 25) in each case being arranged centrally in the four longitudinal surfaces (27) lying in diametric pairs relative to one another.
  7. Working cylinder according to one or more of the preceding claims, characterized in that a locking device (43) to prevent axial displacement on the longitudinal spurs (22, 23) is arranged on the flange plate (12).
  8. Working cylinder according to one of Claimsÿ1 to 7, characterized in that the cylinder covers (17, 19) are respectively arranged so that they are axially secured in the cylinder liner (11).
  9. Working cylinder according to one of Claimsÿ1 to 8, characterized in that the longitudinal spurs (22 to 25) of the profiled tube have, viewed in cross-section, an approximately semi-circular guide surface (28) which merges into a longitudinal surface (27) of the cylinder liner (11) by means of guide surfaces (29, 31) which are essentially parallel to one another.
  10. Working cylinder according to Claimÿ8, characterized in that the two cylinder covers (17, 19) are installed in a guide bore (14) accommodating the piston (15).
  11. Working cylinder according to Claimÿ8 or 10, characterized in that the maximum external diameter of the cylinder covers (17, 19) corresponds to the diameter of the guide bore (14).
EP92107083A 1991-06-19 1992-04-25 Fluid pressure operated actuator Expired - Lifetime EP0519185B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4120170 1991-06-19
DE4120170A DE4120170A1 (en) 1991-06-19 1991-06-19 PRESSURE-OPERABLE WORKING CYLINDER

Publications (3)

Publication Number Publication Date
EP0519185A1 EP0519185A1 (en) 1992-12-23
EP0519185B1 EP0519185B1 (en) 1994-10-19
EP0519185B2 true EP0519185B2 (en) 1999-08-11

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EP92107083A Expired - Lifetime EP0519185B2 (en) 1991-06-19 1992-04-25 Fluid pressure operated actuator

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2710372B1 (en) * 1993-09-22 1995-11-17 Alain Bourgeois Hydraulic control device for a double-acting cylinder.
JP3131570B2 (en) * 1996-10-14 2001-02-05 エスエムシー株式会社 Rotary actuator
DE10043647B4 (en) * 2000-09-05 2004-02-05 Robert Bosch Gmbh Actuator actuatable by pressure medium
DE10112637A1 (en) * 2001-03-14 2002-09-19 Continental Teves Ag & Co Ohg Blank for main cylinder is cut from pressed strand
US11009048B1 (en) 2020-09-09 2021-05-18 Robert Bosch Gmbh Boom lift system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3060901A (en) * 1960-05-31 1962-10-30 Ling Temco Vought Inc Hydraulic actuator with integrally housed valve
US3571883A (en) * 1968-04-19 1971-03-23 Westinghouse Air Brake Co Method of making a fluid operated cylinder device
DE3246970A1 (en) * 1982-12-18 1984-06-20 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen PRESSURE-OPERABLE WORKING CYLINDER
DE8315785U1 (en) * 1983-05-28 1986-06-26 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Pressure medium-operated piston-cylinder unit with magnetic shoe to prevent rotation
DE3436946C2 (en) * 1984-10-09 1994-06-09 Mannesmann Ag linear actuator
FR2573490B1 (en) * 1984-11-19 1988-08-26 Telemecanique Electrique CYLINDER HAVING A TRANSFER CHANNEL INTEGRATED IN THE CYLINDER
AT386656B (en) * 1986-04-01 1988-09-26 Hoerbiger Pneumatic Gmbh PRESSURE-OPERABLE WORKING CYLINDER
ES2045272T3 (en) * 1989-03-03 1994-01-16 Festo Kg CYLINDER FOR ONE CYLINDER-PISTON UNIT.

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DE4120170A1 (en) 1992-12-24
DE59200647D1 (en) 1994-11-24
EP0519185A1 (en) 1992-12-23
EP0519185B1 (en) 1994-10-19

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