EP0662568A1 - Linear driving cylinder - Google Patents

Linear driving cylinder Download PDF

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Publication number
EP0662568A1
EP0662568A1 EP94120983A EP94120983A EP0662568A1 EP 0662568 A1 EP0662568 A1 EP 0662568A1 EP 94120983 A EP94120983 A EP 94120983A EP 94120983 A EP94120983 A EP 94120983A EP 0662568 A1 EP0662568 A1 EP 0662568A1
Authority
EP
European Patent Office
Prior art keywords
linear drive
cylinder tube
drive device
sealing plug
bore
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.)
Granted
Application number
EP94120983A
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German (de)
French (fr)
Other versions
EP0662568B1 (en
Inventor
Reinhard Lipinski
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Invest Tech AG
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Invest Tech AG
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Publication date
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1433—End caps
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/082—Characterised by the construction of the motor unit the motor being of the slotted cylinder type
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1438—Cylinder to end cap assemblies
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/222—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which throttles the main fluid outlet as the piston approaches its end position

Definitions

  • the invention relates to a linear drive cylinder with the features of the preamble of claim 1.
  • linear modules are known from practice as linear drives, in which a piston is moved in an elongated, essentially closed or laterally slotted guide tube by means of pressure means or by means of traction means, which piston is used with suitable force transmission means, such as a piston rod or one that passes through the side slot of the guide tube Machine elements to be driven operated.
  • suitable force transmission means such as a piston rod or one that passes through the side slot of the guide tube Machine elements to be driven operated.
  • the more or less long guide tube is closed at the end with a cover or closure piece.
  • this cover serves to seal the chamber which is otherwise delimited by the piston and the guide tube.
  • a gear and a motor such as a stepper motor, are arranged on the closure piece.
  • To attach the respective Lids on the guide tube usually require extensive machining of the guide cylinder, which is otherwise only cut to length from prepared semi-finished products.
  • a linear actuator actuated by pressure medium is known.
  • This has a longitudinally slotted guide tube, which is sealed by a flexible band and in which a piston is sealed and slidably mounted, which engages through the side slot of the guide tube with a flat driver.
  • the guide tube is closed with cylinder-head-like covers.
  • the guide tube is provided with an external thread.
  • the respective cover has a corresponding internal thread, which is in engagement with the external thread of the guide tube.
  • a pressure medium cylinder with a likewise longitudinally slit cylinder which is closed at the end is known.
  • This has a cylinder tube in which a piston is mounted in a longitudinally displaceable and sealed manner, which engages through the lateral slot with a web-like part which serves as an output in connection with a force transmission element.
  • the cylinder is closed by a cover which has a cylindrical section projecting somewhat into the interior of the cylinder tube. Following the cylindrical section, the diameter of the cover increases so that it has an annular shoulder. The ring shoulder rests on the end face of the cylinder tube.
  • To fix the lid on the Pressure fluid cylinders are threaded holes in the end face of the cylinder tube, into which fastening screws penetrating the cover are screwed.
  • the cylinder bore formed in the cylinder tube inherently has a smooth wall because it has the task of guiding the sliding piston.
  • This smooth wall offers a defined contact surface for the closure designed as a stopper, without the need to machine the cut or end face that is produced when the cylinder tube is cut to length.
  • the at least one transverse bore provided for fastening the sealing plug in the wall of the cylinder tube can be introduced into the cylinder tube without problems and with little effort.
  • the thickness of the wall hardly plays a role here. Even if the wall should be relatively thin, and so thin that a stronger stud or a larger threaded hole can no longer be easily drilled in the longitudinal direction in the wall, the cross hole offers this penetrating fasteners secure hold.
  • the fastener which can be, for example, a bolt or a holding tube, is inserted transversely in the sealing plug and the transverse bore of the cylinder tube.
  • the cylinder tube can have two cross bores, which are diametrically opposed and aligned with the cross bore of the stopper.
  • a single fastening means for example a pipe or bolt, can be pushed through the transverse bores and fixed therein, other embodiments also being conceivable. All have in common that the end of the cylinder tube is achieved with a few, inexpensive to produce and easy to assemble parts.
  • the sealing plug has one or more blind bores which correspond to corresponding transverse bores in the cylinder tube.
  • Fasteners which both penetrate the transverse bores of the cylinder walls and protrude into the blind bores, fix the sealing plug in the axial direction.
  • the cross bore of the sealing plug is a through bore. This makes it possible to use a single fastening means which completely engages through the cylinder tube and the sealing plug.
  • the cross bore of the sealing plug can be smooth-walled. If the transverse bore is a through bore, a bolt can be pushed through all the transverse bores, for example, and secured on both sides of the cylinder tube with nuts. However, it is also possible to provide the cross bores of the cylinder tube with an internal thread into which bolts with external threads are screwed, which engage with a pin section in the cross bore of the sealing plug and thus secure it.
  • a threadless bolt can be inserted through the cross holes and secured in it by caulking, riveting or gluing. This is regardless of whether the bolt is full or hollow, i.e. is designed as a holding tube.
  • the transverse bore of the sealing plug can also be provided with an internal thread. This makes it possible to screw bolts through the cross bore of the cylinder tube into the cross bore of the sealing plug, which are shorter than the radius of the cylinder tube. It is possible to use only two diametrically opposed bolts as well as several bolts distributed around the circumference of the cylinder tube.
  • the fastening means has a through hole. This is connected to the channel.
  • the fastening means also forms a connecting flange for the compressed air, which is preferably used as pressure medium, so that the compressed air connection is also prepared when the sealing plug is mounted on the cylinder tube.
  • the channel can be a bore lying coaxially to the cylinder tube. This can extend through a damping pin provided coaxially to the cylinder tube and the sealing plug, which can be received by a corresponding blind bore provided on the piston.
  • the damping pin provides in connection with the blind bore provided on the piston for the outflowing Pressure medium represents an increased flow resistance as soon as the pin protrudes into the blind hole. This slows down the piston movement towards the sealing plug and prevents the piston from hitting hard on the sealing plug.
  • the interior enclosed by the cylinder tube is cylindrical in order to enable a good sealing of the piston against the wall of the cylinder tube.
  • the plug is also cylindrical.
  • a seal is provided to seal the sealing plug against the cylinder tube. In a simple manner, this can be an O-ring inserted into an annular groove provided on the sealing plug. If this seal is arranged between the transverse bore and the end face of the sealing plug facing the piston, an additional sealing of the fastening means against the cylinder tube is unnecessary.
  • the sealing plug is provided with an axial through hole lying coaxially to the cylinder tube. This is particularly useful if the cylinder tube has no lateral slot for leading out a web for power transmission.
  • a piston rod can then be guided in a sealed manner through the through bore.
  • the fastener does not reach the center of the plug.
  • Two bolts are then screwed into the threaded cross bore of the sealing plug, leaving the passage for the piston rod free in the middle. If at least one of the bolts is provided with a through hole, it can also serve as a pressure medium connection in this embodiment.
  • the leading through the plug The longitudinal bore is then sealed on the outside against the piston rod, while it forms an annular gap with the piston rod towards the cylinder interior, through which the pressure medium can flow in and out to the bolt with the through bore.
  • the piston is provided with two piston rods which are parallel to one another and which are guided through corresponding parallel through-bores in the sealing plug.
  • the piston rods thus form an anti-rotation device for the piston.
  • a continuous fastening means such as a holding tube, can again be used.
  • the sealing plug is a plastic injection molded part.
  • the plug can be integrally formed with the damping pin, which reduces the manufacturing effort.
  • a linear drive cylinder 1 serving as a linear module or linear drive, in which a cylinder tube 2 consisting of an extruded aluminum profile forms a base body. With a smooth wall 3 describing a cylinder, the cylinder tube 2 encloses an interior 4. In this a piston 5 is axially displaceable and is sealed against the wall 3. The end of the cylinder tube 2 is closed by a plug 6, only one end of the cylinder tube 2 being shown in FIG. 1.
  • the cylinder tube 2 as can also be seen in particular from FIG. 2, is provided with a longitudinal slot 7 which is penetrated by a web 8 which is fastened to the piston 5 and is not shown in detail.
  • the web 8 is connected to an essentially plate-shaped or cuboid output part 9, which can carry out a linear movement along the longitudinal extent 10 of the linear drive cylinder 1 in accordance with the piston movement.
  • the longitudinal slot 7 is sealed off by a sealing tape 11 for excess pressures prevailing in the interior 4, the sealing tape 11 being guided inwards in the web 8 in a non-pressurized area of the linear drive cylinder 1.
  • This enables the power transmission from the piston 5 via the web 8 to the driven part 9.
  • the sealing strip 11 is held stationary on the end face of the cylinder tube 2 by means of a screw connection which is only indicated schematically at 12.
  • the sealing plug 6 is essentially cylindrical and is sealed against the wall 3 of the cylinder tube 2 by means of an O-ring 16 located in an annular groove 15.
  • the sealing plug 6 has two circular flat surfaces 17, 18 which are parallel to one another and at a distance, the flat surface 18 facing the interior 4 and the flat surface 17 being flush with the end face of the cylinder tube 2.
  • the sealing plug 6 is provided with a transverse bore 20 which, as can be seen in particular from FIG. 2, is aligned with two mutually opposite transverse bores 21, 22 of the cylinder tube 2.
  • the cross bores 20, 21, 22 have mutually matching diameters and are penetrated by a holding tube 23, the length of which is greater than the distance between the outer sides of the cylindrical tube 2, which is essentially rectangular in cross section.
  • the holding tube 23 is provided with an external thread, onto which the nuts 24 are screwed.
  • the holding tube 23 has a through bore 27 and is additionally provided approximately in the middle with a total of four outlet bores 28, 29, 30, 31.
  • the outlet bores 28, 29, 30, 31 open into a flat groove 32 provided in the holding tube 23.
  • the groove 32 communicates with an axial opening provided in the sealing plug 6 or a channel 33 which leads into the interior 4.
  • the channel 33 extends through a damping pin 34 formed on the sealing plug 6.
  • the damping pin 34 is arranged coaxially with the sealing plug 6 and the cylinder tube 2 and extends towards the piston 5.
  • a blind bore 35 is provided in the piston 5, the depth of which is greater than the length of the damping pin 34 and the inner diameter of which is greater than the outer diameter of the damping pin 34.
  • the retaining tube 23 is provided with an internal thread 35 in its through bore 27, into which an external connection can be screwed.
  • ring grooves 36, 37 are provided, in which O-rings are inserted.
  • FIGS. 3 and 4 another embodiment of the linear drive cylinder 1 is shown, which is also a rodless pressure medium cylinder with a slotted cylinder tube 2.
  • 3 shows the linear drive cylinder 1 cut along the section line III-III
  • FIG. 4 shows the end section of the linear drive cylinder 1 cut along the line IV-IV.
  • the representation of the slot closed with the sealing tape 11 has been omitted in FIGS. 3 and 4.
  • the cylinder tube 2 is closed at the end with the sealing plug 6, which sits in the cylinder tube 2 in a sealed manner on the wall 3 via the O-ring 16.
  • the transverse bore of the sealing plug 6 is provided with a continuous internal thread 41 into which both the cross hole 21 through screw 42 and, from the other side, a screw through the cross hole 22 screw 43 are screwed. The screws 42, 43 are tightened and fix the sealing plug 6 in the axial direction.
  • Both the screw 42 and the screw 43 are provided with a through hole 44, 45, both of which communicate with the channel 33.
  • both screws 42, 43 are provided with threads 46, 47 in their through bores 44, 45.
  • the screws 42, 43 thus serve both as a fastening means for the sealing plug 6 in the cylinder tube 2 and as a pressure medium supply line into the interior 4.
  • the sealing plug 6 can be inserted into an unslotted cylinder tube and serve as a closure thereon. If a through bore between the screws 42, 43 is provided in the sealing plug 6, it can receive a piston rod, a corresponding seal being provided in the area between the transverse bore 20 and the end face 17.
  • piston rods In order to secure the piston 5 against rotation, two mutually parallel piston rods can be used, both of which are connected to the piston 5.
  • the piston rods go eccentrically through corresponding through holes provided in the sealing plug 6, in which they are guided in a sealed manner.
  • transverse bore 20 remains free, i.e. the through holes for the piston rod do not intersect the transverse bore 20.
  • a continuous holding tube 23 can thus be used as a fastening element.
  • the linear drive cylinder 1 can also be actuated by traction means.
  • the screws 42, 43 are designed without a through hole and a sealing of the sealing plug 6 with respect to the wall 3 of the cylinder tube 2 can be dispensed with.
  • a wind device sits on the sealing plug 6 at the flat surface 17 and actuates a traction means which is guided through an axial opening provided in the sealing plug 6 and is fastened to the piston 5.
  • the traction means can be a toothed belt, the wind device being an electric motor that is connected to the toothed belt via gear means.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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  • Pipe Accessories (AREA)
  • Valve Device For Special Equipments (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

A closure (6) is provided for the cylinder tube (2), which with at least one section extends into the cylinder tube and is held by fixtures on the cylinder tube. The closure is formed as a closure plug, which is inserted in the cylinder tube. It has at least one cross-bore (20), which coincides with a cross-bore in the cylinder tube crossways to the longitudinal direction (10). The fixtures extend crossways to the longitudinal direction of the cylinder tube and in the at least one cross-bore of the closure plug. They also engage through the corresp. cross-bore of the cylinder tube. The cross-bore of the closure plug is a through passage bore.

Description

Die Erfindung betrifft einen Linearantriebszylinder mit den Merkmalen des Oberbegriffs des Patentanspruches 1.The invention relates to a linear drive cylinder with the features of the preamble of claim 1.

Als Linearantriebe sind aus der Praxis sogenannte Linearmodule bekannt, bei denen in einem langgestreckten, im wesentlichen geschlossenen oder seitlich geschlitzten Führungsrohr über Druckmittel oder über Zugmittel ein Kolben bewegt wird, der mit geeigneten Kraftübertragungsmitteln, wie beispielsweise einer Kolbenstange oder einen den seitlichen Schlitz des Führungsrohrs durchgreifenden Mitnehmer anzutreibende Maschinenelemente betätigt. Bei allen diesen Linearantrieben ist das mehr oder weniger lange Führungsrohr endseitig mit einem Deckel oder Verschlußstück verschlossen. Dieser Deckel dient, wenn der Linearantrieb druckmittelbetätigt ist, der Abdichtung der im übrigen von dem Kolben und dem Führungsrohr begrenzten Kammer. Ist der Linearantrieb zugmittelbetätigt, sind an dem Verschlußstück ein Getriebe und ein Motor, wie beispielsweise ein Schrittmotor, angeordnet. Zur Befestigung der jeweiligen Deckel an dem Führungsrohr sind meist umfangreichere Bearbeitungen des ansonsten lediglich von vorbereiteten Halbzeugen abgelängten Führungszylinders erforderlich.So-called linear modules are known from practice as linear drives, in which a piston is moved in an elongated, essentially closed or laterally slotted guide tube by means of pressure means or by means of traction means, which piston is used with suitable force transmission means, such as a piston rod or one that passes through the side slot of the guide tube Machine elements to be driven operated. In all of these linear drives, the more or less long guide tube is closed at the end with a cover or closure piece. When the linear drive is actuated by pressure medium, this cover serves to seal the chamber which is otherwise delimited by the piston and the guide tube. If the linear drive is actuated by traction means, a gear and a motor, such as a stepper motor, are arranged on the closure piece. To attach the respective Lids on the guide tube usually require extensive machining of the guide cylinder, which is otherwise only cut to length from prepared semi-finished products.

Aus der GB-13 29 629 ist ein druckmittelbetätigter Linearantrieb bekannt. Dieser weist ein längsgeschlitztes Führungsrohr auf, das über ein flexibles Band abgedichtet ist und in dem ein Kolben abgedichtet und verschiebbar gelagert ist, der den seitlichen Schlitz des Führungsrohrs mit einem flachen Mitnehmer durchgreift. Endseitig ist das Führungsrohr mit zylinderkopfartigen Deckeln verschlossen. Dazu ist das Führungsrohr mit Außengewinde versehen. Der jeweilige Deckel weist ein entsprechendes Innengewinde auf, das mit dem Außengewinde des Führungsrohres in Eingriff steht.From GB-13 29 629 a linear actuator actuated by pressure medium is known. This has a longitudinally slotted guide tube, which is sealed by a flexible band and in which a piston is sealed and slidably mounted, which engages through the side slot of the guide tube with a flat driver. At the end, the guide tube is closed with cylinder-head-like covers. For this purpose, the guide tube is provided with an external thread. The respective cover has a corresponding internal thread, which is in engagement with the external thread of the guide tube.

Bei diesem Linearantrieb ist es nach dem Ablängen des Führungsrohres erforderlich, auf die Enden desselben ein Außengewinde aufzubringen.With this linear drive, after the guide tube has been cut to length, it is necessary to apply an external thread to the ends thereof.

Aus der EP-0 113 790 A1 ist ein Druckmittelzylinder mit einem ebenfalls längsgeschlitzten, endseitig verschlossenen Zylinder bekannt. Dieser weist ein Zylinderrohr auf, in dem ein Kolben längsverschieblich und abgedichtet gelagert ist, der den seitlichen Schlitz mit einem stegartigen Teil durchgreift, das in Verbindung mit einem Kraftübertragungselement als Abtrieb dient. Endseitig ist der Zylinder durch einen Deckel verschlossen, der einen etwas in den Innenraum des Zylinderrohres hineinragenden zylinderförmigen Abschnitt aufweist. Im Anschluß an den zylinderförmigen Abschnitt vergrößert sich der Durchmesser des Deckels, so daß dieser eine Ringschulter aufweist. Die Ringschulter liegt an der endseitigen Stirnfläche des Zylinderrohres an. Zur Fixierung des Deckels an dem Druckmittelzylinder sind in die Stirnfläche des Zylinderrohres Gewindebohrungen eingebracht, in die den Deckel durchgreifende Befestigungsschrauben eingeschraubt sind.From EP-0 113 790 A1 a pressure medium cylinder with a likewise longitudinally slit cylinder which is closed at the end is known. This has a cylinder tube in which a piston is mounted in a longitudinally displaceable and sealed manner, which engages through the lateral slot with a web-like part which serves as an output in connection with a force transmission element. At the end, the cylinder is closed by a cover which has a cylindrical section projecting somewhat into the interior of the cylinder tube. Following the cylindrical section, the diameter of the cover increases so that it has an annular shoulder. The ring shoulder rests on the end face of the cylinder tube. To fix the lid on the Pressure fluid cylinders are threaded holes in the end face of the cylinder tube, into which fastening screws penetrating the cover are screwed.

Bei der Herstellung des Zylinderrohres ist es nach dem Ablängen von entsprechend vorbereitetem Halbzeug erforderlich, mehrere Gewindebohrungen über die Stirnfläche verteilt in das Zylinderrohr einzubringen. Dies setzt eine Mindestwandstärke voraus, die nicht unterschritten werden kann.In the manufacture of the cylinder tube, it is necessary, after the correspondingly prepared semi-finished product has been cut to length, to introduce a plurality of threaded bores into the cylinder tube distributed over the end face. This requires a minimum wall thickness that cannot be undercut.

Davon ausgehend ist es Aufgabe der Erfindung, einen Linearantriebzylinder zu schaffen, dessen Aufbau eine hohe Freizügigkeit bei der Bemessung zuläßt und der kostengünstig zu fertigen ist.Proceeding from this, it is an object of the invention to provide a linear drive cylinder, the construction of which allows a high degree of freedom of movement in the dimensioning and which is inexpensive to manufacture.

Diese Aufgabe wird durch einen Linearantriebzylinder mit den Merkmalen des kennzeichnenden Teiles des Patentanspruches 1 gelöst.This object is achieved by a linear drive cylinder with the features of the characterizing part of patent claim 1.

Die in dem Zylinderrohr ausgebildete Zylinderbohrung hat, weil sie die Aufgabe hat, den gleitend gelagerten Kolben zu führen, von Haus aus eine glatte Wandung. Diese glatte Wandung bietet eine definierte Anlagefläche für den als Verschlußstopfen ausgebildeten Verschluß, ohne daß eine Bearbeitung der bei dem Ablängen des Zylinderrohres entstandenen Schnitt- oder Stirfläche erforderlich wäre. Die zur Befestigung des Verschlußstopfens in der Wandung des Zylinderrohres vorgesehene wenigstens eine Querbohrung, ist problemlos und ohne größeren Aufwand in das Zylinderrohr einbringbar. Dabei spielt die Dicke der Wandung kaum eine Rolle. Selbst wenn die Wandung relativ dünn sein sollte, und zwar so dünn, daß ein stärkerer Stehbolzen oder eine größere Gewindebohrung nicht mehr ohne weiteres in Längsrichtung in die Wandung gebohrt werden kann, bietet die Querbohrung einem diese durchgreifenden Befestigungsmittel sicheren Halt. Das Befestigungsmittel, das beispielsweise ein Bolzen oder ein Halterohr sein kann, steckt dabei quer in dem Verschlußstopfen und der Querbohrung des Zylinderrohres. Das Zylinderrohr kann dabei zwei Querbohrungen aufweisen, die sich diametral gegenüberliegen und mit der Querbohrung des Stopfens fluchten. In diesem Falle kann ein einziges Befestigungsmittel, beispielsweise ein Rohr oder Bolzen, durch die Querbohrungen durchgesteckt und darin fixiert werden, wobei auch andere Ausführungsformen denkbar sind. Allen ist gemeinsam, daß der Abschluß des Zylinderrohres mit wenigen, kostengünstig herzustellenden und einfach zu montierenden Teilen erreicht wird.The cylinder bore formed in the cylinder tube inherently has a smooth wall because it has the task of guiding the sliding piston. This smooth wall offers a defined contact surface for the closure designed as a stopper, without the need to machine the cut or end face that is produced when the cylinder tube is cut to length. The at least one transverse bore provided for fastening the sealing plug in the wall of the cylinder tube can be introduced into the cylinder tube without problems and with little effort. The thickness of the wall hardly plays a role here. Even if the wall should be relatively thin, and so thin that a stronger stud or a larger threaded hole can no longer be easily drilled in the longitudinal direction in the wall, the cross hole offers this penetrating fasteners secure hold. The fastener, which can be, for example, a bolt or a holding tube, is inserted transversely in the sealing plug and the transverse bore of the cylinder tube. The cylinder tube can have two cross bores, which are diametrically opposed and aligned with the cross bore of the stopper. In this case, a single fastening means, for example a pipe or bolt, can be pushed through the transverse bores and fixed therein, other embodiments also being conceivable. All have in common that the end of the cylinder tube is achieved with a few, inexpensive to produce and easy to assemble parts.

Prinzipiell genügt es, wenn der Verschlußstopfen ein oder mehrere Sackbohrungen aufweist, die mit entsprechenden Querbohrungen des Zylinderrohres übereinstimmen. Befestigungsmittel, die sowohl die Querbohrungen der Zylinderwandungen durchgreifen als auch in die Sackbohrungen hineinragen, fixieren den Verschlußstopfen in axialer Richtung. Jedoch ist es vorteilhaft, wenn die Querbohrung des Verschlußstopfens eine Durchgangsbohrung ist. Das ermöglicht es nämlich, ein einziges Befestigungsmittel zu verwenden, das das Zylinderrohr und den Verschlußstopfen ganz durchgreift.In principle, it is sufficient if the sealing plug has one or more blind bores which correspond to corresponding transverse bores in the cylinder tube. Fasteners, which both penetrate the transverse bores of the cylinder walls and protrude into the blind bores, fix the sealing plug in the axial direction. However, it is advantageous if the cross bore of the sealing plug is a through bore. This makes it possible to use a single fastening means which completely engages through the cylinder tube and the sealing plug.

Die Querbohrung des Verschlußstopfens kann glattwandig ausgeführt sein. Ist die Querbohrung dabei eine Durchgangsbohrung, kann beispielsweise ein Bolzen durch alle Querbohrungen durchgesteckt und zu beiden Seiten des Zylinderrohres mit Muttern gesichert sein. Jedoch ist es auch möglich, die Querbohrungen des Zylinderrohres mit Innengewinde zu versehen, in die mit Außengewinde versehene Bolzen eingeschraubt werden, die mit einem Zapfenabschnitt in die Querbohrung des Verschlußstopfens eingreifen und diesen somit sichern.The cross bore of the sealing plug can be smooth-walled. If the transverse bore is a through bore, a bolt can be pushed through all the transverse bores, for example, and secured on both sides of the cylinder tube with nuts. However, it is also possible to provide the cross bores of the cylinder tube with an internal thread into which bolts with external threads are screwed, which engage with a pin section in the cross bore of the sealing plug and thus secure it.

Überdies kann ein gewindeloser Bolzen durch die Querbohrungen gesteckt und durch Verstemmen, Vernieten oder Kleben darin gesichert werden. Dies ist unabhängig davon, ob der Bolzen voll oder hohl, d.h. als Halterohr ausgebildet ist.In addition, a threadless bolt can be inserted through the cross holes and secured in it by caulking, riveting or gluing. This is regardless of whether the bolt is full or hollow, i.e. is designed as a holding tube.

Es kann jedoch auch die Querbohrung des Verschlußstopfens mit Innengewinde versehen sein. Dies ermöglicht es, Schraubenbolzen durch die Querbohrung des Zylinderrohes in die Querbohrung des Verschlußstopfens einzuschrauben, die kürzer als der Radius des Zylinderrohres sind. Dabei ist es sowohl möglich, lediglich zwei sich diametral gegenüberliegende Bolzen als auch mehrere um den Umfang des Zylinderrohres verteilte Bolzen zu verwenden.However, the transverse bore of the sealing plug can also be provided with an internal thread. This makes it possible to screw bolts through the cross bore of the cylinder tube into the cross bore of the sealing plug, which are shorter than the radius of the cylinder tube. It is possible to use only two diametrically opposed bolts as well as several bolts distributed around the circumference of the cylinder tube.

Wenn in dem Verschlußstopfen wenigstens ein die Querbohrung mit dem von dem Zylinderrohr umschlossenen Innenraum verbindender Kanal vorgesehen ist, kann über die in dem Zylinderrohr und dem Verschlußstopfen vorgesehenen Querbohrungen Druckmittel in das Zylinderrohr ein- bzw. herausgeleitet werden. Dazu ist es vorteilhaft, wenn das Befestigungsmittel eine Durchgangsbohrung aufweist. Diese steht mit dem Kanal in Verbindung. Somit bildet das Befestigungsmittel zugleich einen Anschlußflansch für die vorzugsweise als Druckmittel verwendete Druckluft, so daß zugleich mit der Montage des Verschlußstopfens an dem Zylinderrohr auch der Druckluftanschluß vorbereitet ist.If at least one channel connecting the transverse bore with the interior space enclosed by the cylinder tube is provided in the sealing plug, pressure medium can be introduced into and out of the cylinder tube via the transverse bores provided in the cylinder tube and the sealing plug. For this purpose, it is advantageous if the fastening means has a through hole. This is connected to the channel. Thus, the fastening means also forms a connecting flange for the compressed air, which is preferably used as pressure medium, so that the compressed air connection is also prepared when the sealing plug is mounted on the cylinder tube.

In einfacher Weise kann der Kanal eine koaxial zu dem Zylinderrohr liegende Bohrung sein. Diese kann sich durch einen koaxial zu dem Zylinderrohr und dem Verschlußstopfen vorgesehenen Dämpfungszapfen hindurch erstrecken, der von einer entsprechenden, an dem Kolben vorgesehenen Sackbohrung aufgenommen werden kann. Der Dämpfungszapfen stellt in Verbindung mit der an dem Kolben vorgesehenen Sackbohrung für das ausströmende Druckmittel einen vergrößerten Strömungswiderstand dar, sobald der Zapfen in die Sackbohrung ragt. Damit wird die auf den Verschlußstopfen zu gerichtete Kolbenbewegung abgebremst und ein hartes Aufschlagen des Kolbens an dem Verschlußstopfen verhindert.In a simple manner, the channel can be a bore lying coaxially to the cylinder tube. This can extend through a damping pin provided coaxially to the cylinder tube and the sealing plug, which can be received by a corresponding blind bore provided on the piston. The damping pin provides in connection with the blind bore provided on the piston for the outflowing Pressure medium represents an increased flow resistance as soon as the pin protrudes into the blind hole. This slows down the piston movement towards the sealing plug and prevents the piston from hitting hard on the sealing plug.

Ist der Linearantrieb druckmittelbetätigt, ist der von dem Zylinderrohr umschlossene Innenraum zylinderförmig, um eine gute Abdichtung des Kolbens gegenüber der Wandung des Zylinderrohres zu ermöglichen. In diesem Fall ist auch der Verschlußstopfen zylinderförmig. Zum Abdichten des Verschlußstopfens gegen das Zylinderrohr ist eine Dichtung vorgesehen. Diese kann in einfacher Weise ein in eine an dem Verschlußstopfen vorgesehene Ringnut eingelegter O-Ring sein. Wenn diese Dichtung zwischen der Querbohrung und der dem Kolben zugewandten Stirnfläche des Verschlußstopfens angeordnet ist, erübrigt sich eine zusätzliche Abdichtung des Befestigungsmittels gegen das Zylinderrohr.If the linear drive is actuated by pressure medium, the interior enclosed by the cylinder tube is cylindrical in order to enable a good sealing of the piston against the wall of the cylinder tube. In this case the plug is also cylindrical. A seal is provided to seal the sealing plug against the cylinder tube. In a simple manner, this can be an O-ring inserted into an annular groove provided on the sealing plug. If this seal is arranged between the transverse bore and the end face of the sealing plug facing the piston, an additional sealing of the fastening means against the cylinder tube is unnecessary.

In einer anderen Ausführungsform ist der Verschlußstopfen mit einer koaxial zu dem Zylinderrohr liegendenden axialen Durchgangsbohrung versehen. Dies ist insbesondere dann sinnvolle wenn das Zylinderrohr keinen seitlichen Schlitz zum Herausführen eines Steges zur Kraftübertragung aufweist. Durch die Durchgangsbohrung kann dann eine Kolbenstange abgedichtet geführt sein. Bei diesem Ausführungsbeispiel erreicht das Befestigungsmittel nicht die Mitte des Verschlußstopfens. Es sind dann zwei Bolzen in die mit Gewinde versehene Querbohrung des Verschlußstopfens eingeschraubt, wobei sie in der Mitte den Durchgang für die Kolbenstange frei lassen. Wenn wenigstens einer der Bolzen mit einer Durchgangsbohrung versehen ist, kann er auch bei dieser Ausführungsform als Druckmittelanschluß dienen. Die durch den Verschlußstopfen führende Längsbohrung ist dann an der außen liegenden Seite gegen die Kolbenstange abgedichtet, während sie zu dem Zylinderinnenraum hin mit der Kolbenstange einen Ringspalt bildet, durch den das Druckmittel zu dem Bolzen mit der Durchgangsbohrung ein- und ausströmen kann.In another embodiment, the sealing plug is provided with an axial through hole lying coaxially to the cylinder tube. This is particularly useful if the cylinder tube has no lateral slot for leading out a web for power transmission. A piston rod can then be guided in a sealed manner through the through bore. In this embodiment, the fastener does not reach the center of the plug. Two bolts are then screwed into the threaded cross bore of the sealing plug, leaving the passage for the piston rod free in the middle. If at least one of the bolts is provided with a through hole, it can also serve as a pressure medium connection in this embodiment. The leading through the plug The longitudinal bore is then sealed on the outside against the piston rod, while it forms an annular gap with the piston rod towards the cylinder interior, through which the pressure medium can flow in and out to the bolt with the through bore.

Bei einer weiteren Ausführungsform ist der Kolben mit zwei zueinander parallelen Kolbenstangen versehen, die durch entsprechende parallele Durchgangsbohrungen in dem Verschlußstopfen geführt sind. Die Kolbenstangen bilden damit eine Verdrehsicherung für den Kolben. Außerdem kann wiederum ein durchgehendes Befestigungsmittel,wie beispielsweise ein Halterohr, verwendet werden.In a further embodiment, the piston is provided with two piston rods which are parallel to one another and which are guided through corresponding parallel through-bores in the sealing plug. The piston rods thus form an anti-rotation device for the piston. In addition, a continuous fastening means, such as a holding tube, can again be used.

Eine besonders kostengünstige Fertigung, insbesondere bei höheren Stückzahlen, ergibt sich, wenn der Verschlußstopfen ein Kunststoffspritzteil ist. Dabei kann der Verschlußstopfen mit dem Dämpfungszapfen einstückig ausgebildet sein, was den Fertigungsaufwand reduziert. Jedoch ist es auch möglich, den Verschlußstopfen als Automatenteil, beispielsweise aus Metall, herzustellen.A particularly cost-effective production, especially in the case of larger quantities, is obtained if the sealing plug is a plastic injection molded part. The plug can be integrally formed with the damping pin, which reduces the manufacturing effort. However, it is also possible to produce the sealing plug as an automatic part, for example made of metal.

In der Zeichnung sind Ausführungsbeispiele des Gegenstandes der Erfindung dargestellt. Es zeigen:

Fig. 1
einen Linearantriebszylinder in einer ausschnittsweisen und teilweise aufgebrochenen Darstellung,
Fig. 2
den Linearantriebszylinder nach Fig. 1 in teilweise entlang der Schnittlinie II-II geschnittenen Darstellung mit Blickrichtung auf die Stirnseite,
Fig. 3
eine andere Ausführungsform des Linearantriebszylinders in Schnittdarstellung und
Fig. 4
den Linearantriebszylinder nach Fig. 3 in einer ausschnittsweisen, teilweise aufgebrochenen Seitenansicht.
Exemplary embodiments of the subject matter of the invention are shown in the drawing. Show it:
Fig. 1
a linear drive cylinder in a partial and partially broken representation,
Fig. 2
1 in a partially sectioned view along section line II-II with a view towards the front side,
Fig. 3
another embodiment of the linear drive cylinder in a sectional view and
Fig. 4
the linear drive cylinder of FIG. 3 in a partial, partially broken side view.

In Fig. 1 ist ein als Linearmodul oder Linearantrieb dienende Linearantriebszylinder 1 dargestellt, bei dem ein aus Aluminiumstrangpreßprofil bestehendes Zylinderrohr 2 einen Grundkörper bildet. Mit einer glatten, einen Zylinder beschreibenden Wandung 3 schließt das Zylinderrohr 2 einen Innenraum 4 ein. In diesem ist ein Kolben 5 axial verschiebbar und gegenüber der Wandung 3 abgedichtet gelagert. Endseitig ist das Zylinderrohr 2 durch Verschlußstopfen 6 verschlossen, wobei in Fig. 1 lediglich ein Ende des Zylinderrohres 2 dargestellt ist.1 shows a linear drive cylinder 1 serving as a linear module or linear drive, in which a cylinder tube 2 consisting of an extruded aluminum profile forms a base body. With a smooth wall 3 describing a cylinder, the cylinder tube 2 encloses an interior 4. In this a piston 5 is axially displaceable and is sealed against the wall 3. The end of the cylinder tube 2 is closed by a plug 6, only one end of the cylinder tube 2 being shown in FIG. 1.

Das Zylinderrohr 2 ist, wie insbesondere auch aus Fig. 2 ersichtlich ist, mit einem Längsschlitz 7 versehen, der von einem an dem Kolben 5 befestigten, im einzelnen nicht weiter dargestellten Steg 8 durchgriffen ist.The cylinder tube 2, as can also be seen in particular from FIG. 2, is provided with a longitudinal slot 7 which is penetrated by a web 8 which is fastened to the piston 5 and is not shown in detail.

Der Steg 8 ist mit einem im wesentlichen platten-oder quaderförmigen Abtriebsteil 9 verbunden, das entlang der Längserstreckung 10 des Linearantriebszylinders 1 eine Linearbewegung entsprechend der Kolbenbewegung ausführen kann.The web 8 is connected to an essentially plate-shaped or cuboid output part 9, which can carry out a linear movement along the longitudinal extent 10 of the linear drive cylinder 1 in accordance with the piston movement.

Der Längsschlitz 7 ist durch ein Dichtungsband 11 für in dem Innenraum 4 herrschende überdrücke dicht verschlossen, wobei das Dichtungsband 11 bei dem Steg 8 in einem drucklosen Bereich des Linearantriebszylinders 1 nach innen geführt ist. Damit wird die Kraftübertragung von dem Kolben 5 über den Steg 8 auf das Abtriebsteil 9 ermöglicht. Das Dichtungsband 11 ist bei der Stirnseite des Zylinderrohres 2 mittels einer bei 12 lediglich schematisch angedeuteten Schraubverbindung ortsfest gehalten.The longitudinal slot 7 is sealed off by a sealing tape 11 for excess pressures prevailing in the interior 4, the sealing tape 11 being guided inwards in the web 8 in a non-pressurized area of the linear drive cylinder 1. This enables the power transmission from the piston 5 via the web 8 to the driven part 9. The sealing strip 11 is held stationary on the end face of the cylinder tube 2 by means of a screw connection which is only indicated schematically at 12.

Der Verschlußstopfen 6 ist im wesentlichen zylinderförmig und mittels eines in einer Ringnut 15 liegenden O-Ringes 16 gegen die Wandung 3 des Zylinderrohres 2 abgedichtet. Der Verschlußstopfen 6 weist dabei zwei zueinander im Abstand parallelliegende kreisförmige Planflächen 17, 18 auf, wobei die Planfläche 18 dem Innenraum 4 zugekehrt ist und die Planfläche 17 mit der Stirnfläche des Zylinderrohres 2 abschließt.The sealing plug 6 is essentially cylindrical and is sealed against the wall 3 of the cylinder tube 2 by means of an O-ring 16 located in an annular groove 15. The sealing plug 6 has two circular flat surfaces 17, 18 which are parallel to one another and at a distance, the flat surface 18 facing the interior 4 and the flat surface 17 being flush with the end face of the cylinder tube 2.

Zwischen der Ringnut 15 und der Planfläche 17 ist der Verschlußstopfen 6 mit einer Querbohrung 20 versehen, die, wie insbesondere aus Fig. 2 hervorgeht, mit zwei einander gegenüberliegenden Querbohrungen 21, 22 des Zylinderrohres 2 fluchtet. Die Querbohrungen 20, 21, 22 weisen miteinander übereinstimmende Durchmesser auf und sind von einem Halterohr 23 durchgriffen, dessen Länge größer als der Abstand der Außenseiten des im Querschnitt im wesentlichen rechteckigen Zylinderrohres 2 ist. Endseitig ist das Halterohr 23 mit Außengewinde versehen, auf das Muttern 24 aufgeschraubt sind.Between the annular groove 15 and the flat surface 17, the sealing plug 6 is provided with a transverse bore 20 which, as can be seen in particular from FIG. 2, is aligned with two mutually opposite transverse bores 21, 22 of the cylinder tube 2. The cross bores 20, 21, 22 have mutually matching diameters and are penetrated by a holding tube 23, the length of which is greater than the distance between the outer sides of the cylindrical tube 2, which is essentially rectangular in cross section. At the end, the holding tube 23 is provided with an external thread, onto which the nuts 24 are screwed.

Das Halterohr 23 weist eine Durchgangsbohrung 27 auf und ist zusätzlich etwa mittig mit insgesamt vier Auslaßbohrungen 28, 29, 30, 31 versehen.The holding tube 23 has a through bore 27 and is additionally provided approximately in the middle with a total of four outlet bores 28, 29, 30, 31.

Die Auslaßbohrungen 28, 29, 30, 31 münden in eine bei ihnen in dem Halterohr 23 vorgesehene flache Nut 32. Die Nut 32 kommuniziert mit einer indem Verschlußstopfen 6 vorgesehenen axialen Öffnung oder einen Kanal 33, der in den Innenraum 4 führt.The outlet bores 28, 29, 30, 31 open into a flat groove 32 provided in the holding tube 23. The groove 32 communicates with an axial opening provided in the sealing plug 6 or a channel 33 which leads into the interior 4.

Der Kanal 33 erstreckt sich dabei durch einen an dem Verschlußstopfen 6 angeformten Dämpfungszapfen 34.The channel 33 extends through a damping pin 34 formed on the sealing plug 6.

Der Dämpfungszapfen 34 ist koaxial zu dem Verschlußstopfen 6 und dem Zylinderrohr 2 angeordnet und erstreckt sich in Richtung auf den Kolben 5 zu.The damping pin 34 is arranged coaxially with the sealing plug 6 and the cylinder tube 2 and extends towards the piston 5.

Dem Dämpfungszapfen 34 ist eine in dem Kolben 5 vorgesehene Sackbohrung 35 zugeordnet, deren Tiefe größer als die Länge des Dämpfungszapfens 34 und deren Innendurchmesser größer als der Außendurchmesser des Dämpfungszapfens 34 sind.A blind bore 35 is provided in the piston 5, the depth of which is greater than the length of the damping pin 34 and the inner diameter of which is greater than the outer diameter of the damping pin 34.

Um ein Zu- und Abführen von Druckmittel über das Halterohr 23 in den Innenraum 4 und aus diesem heraus zu ermöglichen, ist das Halterohr 23 bei seiner Durchgangsbohrung 27 mit Innengewinde 35 versehen, in das ein äußerer Anschluß eingeschraubt werden kann. Außerdem sind zur Vermeidung von Druckverlusten im Anschluß an die Nut 32 des Halterohres 23 Ringnuten 36, 37 vorgesehen, in die O-Ringe eingelegt sind.In order to allow a supply and discharge of pressure medium via the holding tube 23 into the interior 4 and out of it, the retaining tube 23 is provided with an internal thread 35 in its through bore 27, into which an external connection can be screwed. In addition, to avoid pressure losses following the groove 32 of the holding tube 23, ring grooves 36, 37 are provided, in which O-rings are inserted.

In den Fig. 3 und 4 ist ein anderes Ausführungsbeispiel des Linearantriebszylinders 1 dargestellt, wobei es sich auch hier um einen kolbenstangenlosen Druckmittelzylinder mit geschlitztem Zylinderrohr 2 handelt. Während in Fig. 3 der Linearantriebszylinder 1 geschnitten entlang der Schnittlinie III-III dargestellt ist, zeigt Fig. 4 den Endabschnitt des Linearantriebszylinders 1, geschnitten entlang der Linie IV-IV. Auf die Darstellung des mit dem Dichtungsband 11 abgeschlossenen Schlitzes wurde in den Fig. 3 und 4 verzichtet.3 and 4, another embodiment of the linear drive cylinder 1 is shown, which is also a rodless pressure medium cylinder with a slotted cylinder tube 2. 3 shows the linear drive cylinder 1 cut along the section line III-III, FIG. 4 shows the end section of the linear drive cylinder 1 cut along the line IV-IV. The representation of the slot closed with the sealing tape 11 has been omitted in FIGS. 3 and 4.

Wie bei dem vorausgegangenen Ausführungsbeispiel ist das Zylinderrohr 2 endseitig mit dem Verschlußstopfen 6 verschlossen, der über den O-Ring 16 an der Wandung 3 abgedichtet in dem Zylinderrohr 2 sitzt. Abweichend von dem vorausgegangenen Ausführungsbeispiel ist die Querbohrung des Verschlußstopfens 6 mit einem durchgehenden Innengewinde 41 versehen, in das sowohl eine die Querbohrung 21 durchgreifende Schraube 42 als auch, von der anderen Seite, eine die Querbohrung 22 durchgreifende Schraube 43 eingeschraubt sind. Die Schrauben 42, 43 sind fest angezogen und fixieren den Verschlußstopfen 6 in axialer Richtung.As in the previous embodiment, the cylinder tube 2 is closed at the end with the sealing plug 6, which sits in the cylinder tube 2 in a sealed manner on the wall 3 via the O-ring 16. Deviating from the previous embodiment, the transverse bore of the sealing plug 6 is provided with a continuous internal thread 41 into which both the cross hole 21 through screw 42 and, from the other side, a screw through the cross hole 22 screw 43 are screwed. The screws 42, 43 are tightened and fix the sealing plug 6 in the axial direction.

Sowohl die Schraube 42 als auch die Schraube 43 ist mit einer Durchgangsbohrung 44, 45 versehen, die beide mit dem Kanal 33 kommunizieren. Um sowohl ein Verschließen der jeweiligen Schraube 42, 43 als auch das Anschließen einer Druckleitung zu ermöglichen, sind beide Schrauben 42, 43 bei ihren Durchgangsbohrungen 44, 45 mit Gewinde 46, 47 versehen. Die Schrauben 42, 43 dienen somit sowohl als Befestigungsmittel für den Verschlußstopfen 6 in dem Zylinderrohr 2 als auch der Druckmittelzuleitung in den Innenraum 4.Both the screw 42 and the screw 43 are provided with a through hole 44, 45, both of which communicate with the channel 33. In order to enable both the respective screw 42, 43 and the connection of a pressure line, both screws 42, 43 are provided with threads 46, 47 in their through bores 44, 45. The screws 42, 43 thus serve both as a fastening means for the sealing plug 6 in the cylinder tube 2 and as a pressure medium supply line into the interior 4.

Darüber hinaus ist es möglich, lediglich eine der beiden Schrauben 42, 43 mit einer Durchgangsbohrung zu versehen, die dann als Anschluß für das Druckmittel dient. Außerdem kann der Verschlußstopfen 6 in ein ungeschlitztes Zylinderrohr eingesetzt werden und an diesem als Abschluß dienen. Wird eine zwischen den Schrauben 42, 43 durchgehende Axialbohrung in dem Verschlußstopfen 6 vorgesehen, kann diese eine Kolbenstange aufnehmen, wobei eine entsprechende Dichtung im Bereiche zwischen der Querbohrung 20 und der stirnseitigen Planfläche 17 vorzusehen ist.In addition, it is possible to provide only one of the two screws 42, 43 with a through hole, which then serves as a connection for the pressure medium. In addition, the sealing plug 6 can be inserted into an unslotted cylinder tube and serve as a closure thereon. If a through bore between the screws 42, 43 is provided in the sealing plug 6, it can receive a piston rod, a corresponding seal being provided in the area between the transverse bore 20 and the end face 17.

Um den Kolben 5 gegen Verdrehungen zu sichern, können zwei zueinander parallele Kolbenstangen verwendet werden, die beide mit dem Kolben 5 verbunden sind. Die Kolbenstangen gehen außermittig durch entsprechende, in dem Verschlußstopfen 6 vorgesehene Durchgangsbohrungen, in denen sie abgedichtet geführt sind.In order to secure the piston 5 against rotation, two mutually parallel piston rods can be used, both of which are connected to the piston 5. The piston rods go eccentrically through corresponding through holes provided in the sealing plug 6, in which they are guided in a sealed manner.

Bei dieser Ausführungsform bleibt die Querbohrung 20 frei, d.h. die Durchgangsbohrungen für die Kolbenstange schneiden die Querbohrung 20 nicht. Somit kann ein durchgehendes Halterohr 23 als Befestigungselement verwendet werden.In this embodiment, the transverse bore 20 remains free, i.e. the through holes for the piston rod do not intersect the transverse bore 20. A continuous holding tube 23 can thus be used as a fastening element.

Schließlich kann der Linearantriebszylinder 1 auch zugmittelbetätigt sein. In diesem Fall sind die Schrauben 42, 43 ohne Durchgangsbohrung ausgeführt und auf eine Abdichtung des Verschlußstopfens 6 gegenüber der Wandung 3 des Zylinderrohres 2 kann verzichtet werden. Dafür sitzt auf dem Verschlußstopfen 6 bei der Planfläche 17 eine Windeinrichtung, die ein Zugmittel betätigt, das durch eine in dem Verschlußstopfen 6 vorgesehene Axialöffnung geführt und an dem Kolben 5 befestigt ist. Das Zugmittel kann ein Zahnriemen sein, wobei die Windeinrichtung ein über Getriebemittel mit dem Zahnriemen in Verbindung stehender Elektromotor ist.Finally, the linear drive cylinder 1 can also be actuated by traction means. In this case, the screws 42, 43 are designed without a through hole and a sealing of the sealing plug 6 with respect to the wall 3 of the cylinder tube 2 can be dispensed with. For this purpose, a wind device sits on the sealing plug 6 at the flat surface 17 and actuates a traction means which is guided through an axial opening provided in the sealing plug 6 and is fastened to the piston 5. The traction means can be a toothed belt, the wind device being an electric motor that is connected to the toothed belt via gear means.

Claims (29)

Linearantriebszylinder (1),
mit einem Zylinderrohr (2), in dem ein Kolben (5) in Längsrichtung verschiebbar gelagert ist,
mit einem einen Abtrieb bildenden Kraftübertragungsmittel, das mit dem Kolben (5) verbunden und das aus dem Zylinderrohr (2) herausgeführt ist,
mit einem das Zylinderrohr (2) abschließenden Verschluß (6), der mit wenigstens einem Abschnitt in das Zylinderrohr (2) hineinragt und der durch Befestigungsmittel (23) an dem Zylinderrohr (2) gehalten ist,
dadurch gekennzeichnet,
daß der Verschluß (6) als Verschlußstopfen (6) ausgebildet ist, der in das Zylinderrohr (2) eingeführt ist,
daß der Verschlußstopfen (6) wenigstens eine Querbohrung (20) aufweist, die mit einer quer zu der Längsrichtung (10) in dem Zylinderrohr (2) vorgesehenen Querbohrung (21) übereinstimmt, und
daß das Befestigungsmittel (23) quer zu der Längsrichtung des Zylinderrohres (2) sowohl sich in die wenigstens eine Querbohrung (20) des Verschlußstopfens (6) erstreckt als auch die entsprechende Querbohrung (21) des Zylinderrohres (2) durchgreift.Linear drive cylinder (1),
with a cylinder tube (2) in which a piston (5) is mounted so as to be displaceable in the longitudinal direction,
with a power transmission means forming an output, which is connected to the piston (5) and which is led out of the cylinder tube (2),
with a closure (6) which closes the cylinder tube (2), which projects into the cylinder tube (2) with at least one section and which is held on the cylinder tube (2) by fastening means (23),
characterized,
that the closure (6) is designed as a closure plug (6) which is inserted into the cylinder tube (2),
that the sealing plug (6) has at least one transverse bore (20) which corresponds to a transverse bore (21) provided in the cylinder tube (2) transversely to the longitudinal direction (10), and
that the fastening means (23) transversely to the longitudinal direction of the cylinder tube (2) both extends into the at least one transverse bore (20) of the sealing plug (6) and also extends through the corresponding transverse bore (21) of the cylinder tube (2). Linearantriebszylinder nach Anspruch 1, dadurch gekennzeichnet, daß die Querbohrung (20) des Verschlußstopfens (6) eine Durchgangsbohrung (20) ist.Linear drive cylinder according to claim 1, characterized in that the transverse bore (20) of the sealing plug (6) is a through bore (20). Linearantriebszylinder nach Anspruch 1, dadurch gekennzeichnet, daß die Querbohrung (20) des Verschlußstopfens (6) glattwandig ist.Linear drive cylinder according to claim 1, characterized in that the transverse bore (20) of the sealing plug (6) is smooth-walled. Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Querbohrung (20) des Verschlußstopfens (6) mit Innengewinde (41) versehen ist.Linear drive device according to claim 1, characterized in that the transverse bore (20) of the sealing plug (6) is provided with an internal thread (41). Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Befestigungsmittel (23) eine in den Querbohrungen (21) sitzende Schraube (42) ist.Linear drive device according to claim 1, characterized in that the fastening means (23) is a screw (42) seated in the transverse bores (21). Linearantriebseinrichtung nach den Ansprüchen 2, 3 und 5, dadurch gekennzeichnet, daß der Bolzen (23) das Zylinderrohr (2) und den Verschlußstopfen (6) durchgreift und mit wenigstens einer Mutter (24) gesichert ist.Linear drive device according to claims 2, 3 and 5, characterized in that the bolt (23) passes through the cylinder tube (2) and the sealing plug (6) and is secured with at least one nut (24). Linearantriebseinrichtung nach den Ansprüchen 2, 3 und 5, dadurch gekennzeichnet, daß sich der Bolzen (23) in den Verschlußstopfen (6) hinein erstreckt und mit einem Innengewinde in Eingriff steht, das in der Querbohrung (21) des Zylinderrohres (2) vorgesehen ist.Linear drive device according to claims 2, 3 and 5, characterized in that the bolt (23) extends into the sealing plug (6) and is in engagement with an internal thread which is provided in the transverse bore (21) of the cylinder tube (2) . Linearantriebseinrichtung nach den Ansprüchen 4 und 5, dadurch gekennzeichnet, daß die Schraube (42) kürzer als der Außenradius des Zylinderrohres (2) ist.Linear drive device according to claims 4 and 5, characterized in that the screw (42) is shorter than the outer radius of the cylinder tube (2). Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Befestigungsmittel (23) mit dem Zylinderrohr (2) verstemmt ist.Linear drive device according to claim 1, characterized in that the fastening means (23) is caulked to the cylinder tube (2). Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Befestigungsmittel (23) mit dem Zylinderrohr (2) vernietet ist.Linear drive device according to claim 1, characterized in that the fastening means (23) is riveted to the cylinder tube (2). Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Befestigungsmittel (23) mit dem Zylinderrohr (2) und/oder dem Verschlußstopfen (6) verklebt ist.Linear drive device according to claim 1, characterized in that the fastening means (23) is glued to the cylinder tube (2) and / or the sealing plug (6). Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß in dem Verschlußstopfen (6) wenigstens ein die Querbohrung (20) mit den von dem Zylinderrohr (2) umschlossenen Innenraum (4) verbindender Kanal (33) vorgesehen ist.Linear drive device according to Claim 1, characterized in that at least one channel (33) connecting the transverse bore (20) with the interior (4) enclosed by the cylinder tube (2) is provided in the sealing plug (6). Linearantriebseinrichtung nach Anspruch 1 oder 5, dadurch gekennzeichnet, daß das Befestigungsmittel (23, 41) eine Durchgangsbohrung (27, 44) aufweist.Linear drive device according to claim 1 or 5, characterized in that the fastening means (23, 41) has a through hole (27, 44). Linearantriebseinrichtung nach den Ansprüchen 13 und 9, dadurch gekennzeichnet, daß die in dem Befestigungsmittel (23, 41) vorgesehene Durchgangs bohrung (27, 44) mit dem Kanal (33) in Verbindung steht.Linear drive device according to claims 13 and 9, characterized in that the through bore (27, 44) provided in the fastening means (23, 41) is connected to the channel (33). Linearantriebseinrichtung nach Anspruch 12, dadurch gekennzeichnet, daß der Kanal (33) eine koaxial zu dem Zylinderrohr (2) liegende Bohrung ist.Linear drive device according to claim 12, characterized in that the channel (33) is a bore lying coaxially to the cylinder tube (2). Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß an dem Verschlußstopfen (6) eine koaxial zu dem Zylinderrohr (2) liegender und auf den Kolben (5) zu gerichteter Dämpfungszapfen (34) vorgesehen ist.Linear drive device according to Claim 1, characterized in that a damping pin (34) lying coaxially to the cylinder tube (2) and directed towards the piston (5) is provided on the sealing plug (6). Linearantriebseinrichtung nach den Ansprüchen 15 und 17, dadurch gekennzeichnet, daß sich die Bohrung durch den Dämpfungszapfen (34) erstreckt.Linear drive device according to claims 15 and 17, characterized in that the bore extends through the damping pin (34). Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Verschlußstopfen (6) im wesentlichen zylinderförmig ist.Linear drive device according to claim 1, characterized in that the sealing plug (6) is essentially cylindrical. Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Verschlußstopfen (6) zum Abdichten gegenüber dem Zylinderrohr (2) mit einer Dichtung (16) versehen ist.Linear drive device according to claim 1, characterized in that the sealing plug (6) is provided with a seal (16) for sealing against the cylinder tube (2). Linearantriebseinrichtung nach Anspruch 19, dadurch gekennzeichnet, daß die Dichtung (16) ein in eine an dem Verschlußstopfen (6) vorgesehene Ringnut (15) eingelegter O-Ring (16) ist.Linear drive device according to claim 19, characterized in that the seal (16) is an O-ring (16) inserted into an annular groove (15) provided on the sealing plug (6). Linearantriebseinrichtung nach Anspruch 19, dadurch gekennzeichnet, daß die Dichtung (16) an dem Verschlußstopfen (6) zwischen der Querbohrung (20) und einer dem Kolben (5) zugewandten Stirnfläche (18) des Verschlußscopfens (6) angeordnet ist.Linear drive device according to claim 19, characterized in that the seal (16) is arranged on the closure plug (6) between the transverse bore (20) and an end face (18) of the closure head (6) facing the piston (5). Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Verschlußstopfen (6) eine koaxial zu dem Zylinderrohr (2) liegende axiale Durchgangsbohrung (44, 45) aufweist.Linear drive device according to claim 1, characterized in that the sealing plug (6) has an axial through bore (44, 45) lying coaxially to the cylinder tube (2). Linearantriebseinrichtung nach Anspruch 22, dadurch gekennzeichnet, daß von der Durchgangsbohrung (44, 45) eine Kolbenstange abgedichtet aufgenommen ist.Linear drive device according to claim 22, characterized in that a piston rod is received in a sealed manner from the through bore (44, 45). Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Verschlußstopfen (6) zwei parallel zueinander liegende axiale Durchgangsbohrungen aufweist.Linear drive device according to claim 1, characterized in that the sealing plug (6) has two axial through bores lying parallel to one another. Linearantriebseinrichtung nach Anspruch 24, dadurch gekennzeichnet, daß von den Durchgangsbohrungen zwei parallele, mit dem Kolben (5) verbundene Kolbenstangen abgedichtet aufgenommen sind.Linear drive device according to claim 24, characterized in that two parallel piston rods connected to the piston (5) are received in a sealed manner from the through bores. Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Zylinderrohr (2) einen Längsschlitz (7) aufweist, der von einem mit dem Kolben (5) verbundenen Steg (8) durchgriffen ist.Linear drive device according to claim 1, characterized in that the cylinder tube (2) has a longitudinal slot (7) which is penetrated by a web (8) connected to the piston (5). Linearantriebseinrichtung nach Anspruch 26, dadurch gekennzeichnet, daß der Längsschlitz (7) von einem flexiblen, endseitig bezüglich des Zylinderrohres (2) ortsfest gehaltenen Dichtungsband (11) abgedichtet ist.Linear drive device according to claim 26, characterized in that the longitudinal slot (7) is sealed by a flexible sealing tape (11) which is held at the end with respect to the cylinder tube (2). Linearantriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Verschlußstopfen (6) ein Kunststoffspritztell ist.Linear drive device according to claim 1, characterized in that the sealing plug (6) is a plastic injection molding. Linearantriebseinrichtung nach Anspruch 16, dadurch gekennzeichnet, daß der Verschlußstopfen (6) mit dem Dämpfungszapfen (34) einstückig ausgebildet ist.Linear drive device according to claim 16, characterized in that the sealing plug (6) is formed in one piece with the damping pin (34).
EP94120983A 1994-01-11 1994-12-31 Linear driving cylinder Expired - Lifetime EP0662568B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4400483 1994-01-11
DE4400483A DE4400483C2 (en) 1994-01-11 1994-01-11 Linear drive cylinder

Publications (2)

Publication Number Publication Date
EP0662568A1 true EP0662568A1 (en) 1995-07-12
EP0662568B1 EP0662568B1 (en) 1999-08-11

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ID=6507661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94120983A Expired - Lifetime EP0662568B1 (en) 1994-01-11 1994-12-31 Linear driving cylinder

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US (1) US5507218A (en)
EP (1) EP0662568B1 (en)
AT (1) ATE183287T1 (en)
DE (2) DE4400483C2 (en)

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US6314863B1 (en) 1998-07-01 2001-11-13 Smc Kabushiki Kaisha End-closing structure for an actuator
EP2813735B1 (en) * 2013-06-12 2018-08-08 Koganei Corporation Fluid pressure cylinder

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DE29814578U1 (en) * 1998-08-14 1998-10-22 Festo AG & Co, 73734 Esslingen linear actuator
US6439103B1 (en) * 1999-09-07 2002-08-27 Vector Engineering Co. Hydraulic and pneumatic cylinder construction
DE10105432A1 (en) * 2001-02-07 2002-08-08 Suspa Holding Gmbh Piston rod-cylinder housing unit has piston rod protruding from housing, seal, cylindrical pin at one end, and threaded pin holding fixture at other end.
US6805038B2 (en) 2002-10-16 2004-10-19 Clark Equipment Company Hydraulic cylinder pivot pin
US20070074964A1 (en) * 2005-10-03 2007-04-05 Vector Engineering Co. Telescoping fluid actuator
US20070272077A1 (en) * 2006-05-24 2007-11-29 Genie Industries, Inc. Linear actuator assembly
JP5746281B2 (en) * 2013-07-26 2015-07-08 Ｋｙｂ−Ｙｓ株式会社 Fluid pressure cylinder
IT201800008058A1 (en) 2018-08-10 2020-02-10 Sunstar Eng Gmbh HYDRAULIC DRIVE DEVICE FOR A MOTORCYCLE INCLUDING A FLOAT VALVE.

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Also Published As

Publication number Publication date
DE59408614D1 (en) 1999-09-16
ATE183287T1 (en) 1999-08-15
EP0662568B1 (en) 1999-08-11
DE4400483A1 (en) 1995-07-20
DE4400483C2 (en) 1996-12-19
US5507218A (en) 1996-04-16

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