EP0662568B1 - Linear driving cylinder - Google Patents

Linear driving cylinder Download PDF

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Publication number
EP0662568B1
EP0662568B1 EP94120983A EP94120983A EP0662568B1 EP 0662568 B1 EP0662568 B1 EP 0662568B1 EP 94120983 A EP94120983 A EP 94120983A EP 94120983 A EP94120983 A EP 94120983A EP 0662568 B1 EP0662568 B1 EP 0662568B1
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EP
European Patent Office
Prior art keywords
linear drive
end plug
drive cylinder
cylindrical tube
cylinder according
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
Application number
EP94120983A
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German (de)
French (fr)
Other versions
EP0662568A1 (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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    • 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 in which in an elongated, essentially closed or laterally slotted Guide tube is moved over a fluid pressure piston with suitable power transmission means, such as one Piston rod or the side slot of the guide tube machine elements to be driven by penetrating driver operated. With all these linear drives the end of the more or less long guide tube closed a lid or closure piece. This Lid serves to seal the rest of the piston and the guide tube limited chamber. For fixing the respective cover on the guide tube are mostly more extensive edits of the otherwise only from prepared semi-finished cut to length guide tube required.
  • a pressure fluid operated Linear actuator known. This has a longitudinal slit Guide tube that is sealed with a flexible band is and in which a piston is sealed and displaceable is stored, the side slot of the guide tube reaches through with a flat driver. At the end it is Guide tube closed with cylinder-head-like covers. For this purpose, the guide tube is provided with an external thread. Of the each cover has a corresponding internal thread on that engages with the external thread of the guide tube stands.
  • EP 0 113 790 A1 is a pressure medium cylinder with a likewise longitudinally slit, closed at the end Cylinder known.
  • This has a cylinder tube in which a piston is longitudinally displaceable and sealed is stored, the side slot with a reaches through the web-like part, which in connection with a Power transmission element serves as an output.
  • End is the cylinder is closed by a cover, the one something protruding into the interior of the cylinder tube has cylindrical section. Following the cylindrical section, the diameter increases of the lid so that it has an annular shoulder.
  • the Ring shoulder lies on the end face of the Cylinder tube.
  • DE-A-1954888 is a pneumatic Actuator with a cylinder tube known on the cylinder heads are screwed on both ends. Every cylinder head is each provided with a channel over which Pressure medium into and out of the cylinder tube can be directed hereus.
  • the cylinder barrel and the cylinder head must be on the cylinder barrel have a cylindrical outer surface at its end, the can be threaded.
  • One is at rodless cylinders mostly not available.
  • DE-A-2846027 which is the preamble of claim 1 discloses a pressure cylinder known with a cylinder tube in which a piston sealed and axially slidably mounted. To the Piston is attached to a piston rod, which acts as a power transmission means and downforce serves. The piston rod is out led out of the cylinder barrel.
  • the cylinder tube encloses an interior that connects to both ends of the cylinder tube, each with a plug is sealed.
  • Each plug has a cross hole, which is a through hole is trained.
  • the cross hole is aligned with cross holes, which are formed in the cylinder barrel.
  • This through fastening screws are laterally in the Screwed in plug.
  • Two fastening screws hold a sealing plug in pairs.
  • One of the Fastening screws are provided with a through channel, which opens into an interior of the sealing plug. From this a channel leads into the interior of the Cylinder tube.
  • the fastening screws require an internal thread in the cross hole of the sealing plug.
  • the cylinder bore formed in the cylinder tube has, because it has the task, the sliding To guide pistons, inherently a smooth wall.
  • This smooth wall offers a defined contact surface for the formed as a plug, without a processing of the cut to length of the cylinder tube resulting cut or face would be required.
  • the one for fastening the sealing plug in the wall provided at least one transverse bore of the cylinder tube is easy and without much effort in it Cylinder tube can be inserted.
  • the thickness of the Wall hardly matters. Even if the wall is relative should be thin, so thin that a stronger one Stud bolts or a larger threaded hole no longer easily drilled in the longitudinal direction in the wall the cross hole offers you a penetrating one Fasteners secure hold.
  • the fastener that a bolt with a hole or a Can be holding tube, is inserted transversely in the plug and the transverse bore of the cylinder tube.
  • the cylinder barrel has two cross holes, which are diametrically opposite and with the cross hole of the Stopper cursed.
  • the only fastener is inserted through the cross holes and fixed in it. This completes the cylinder tube with a few, inexpensive to manufacture and easy to assemble Sharing achieved.
  • the outlet bores provide a fluid connection between the bore and the channel. Consequently can the linear drive cylinder fluid via a as a fastener serving holding element are supplied.
  • the fastener also forms a connection for the preferably used as a pressure medium Compressed air, so that at the same time as the plug is installed also the compressed air connection on the cylinder tube is prepared.
  • the cross hole of the sealing plug can be smooth-walled be executed.
  • the bolt or the holding tube is then inserted through all cross holes and to both Secured sides of the cylinder barrel with nuts.
  • a threadless bolt can pass through the cross holes inserted and by caulking, riveting or Glue be secured in it. This is regardless whether the bolt is full or hollow, i.e. designed as a holding tube is.
  • the channel can be coaxial to that Be cylindrical bore. This can be through a coaxial to the cylinder tube and the plug provided damping pin through extend from a corresponding one on the piston provided blind hole can be added.
  • the Damping pin connects in conjunction with that on the Piston provided blind bore for the outflowing Pressure medium an increased flow resistance as soon as the pin enters the blind hole protrudes. So that is directed to the plug Piston movement slowed down and a hard hit of the piston on the plug prevented.
  • the of the interior of the cylinder tube is cylindrical, to ensure a good seal between the piston and the wall to enable the cylinder tube.
  • the plug is also cylindrical.
  • a seal is provided for sealing the plug against the cylinder barrel . This can be done in simpler Way in a provided on the plug Ring groove inserted O-ring. If this seal between the transverse bore and the one facing the piston End face of the sealing plug is arranged, superfluous an additional seal of the fastener against the cylinder barrel.
  • sealing plug is a plastic injection molded part.
  • the Sealing plug with the damping pin in one piece be trained, which reduces the manufacturing effort.
  • the plug it is also possible to use the plug as Automat parts, for example made of metal.
  • Fig. 1 is as a linear module or linear drive serving linear drive cylinder 1 shown, in which a cylinder tube made of extruded aluminum 2 forms a base body. With a smooth one Wall 3 describing the cylinder closes the cylinder tube 2 an interior 4. In this is a piston 5 axially displaceable and sealed against the wall 3 stored. The end of the cylinder tube 2 is by a plug 6 closed, only in Fig. 1 one end of the cylinder tube 2 is shown.
  • the cylinder tube 2 is, as in particular, made of 2 can be seen, provided with a longitudinal slot 7, that of one attached to the piston 5, in detail Web 8 is not shown.
  • the web 8 is with a substantially plate or cuboidal driven part 9 connected along the longitudinal extent 10 of the linear drive cylinder 1 a Carry out linear movement according to the piston movement can.
  • the longitudinal slot 7 is through a sealing tape 11 for the overpressures prevailing in the interior 4 are sealed, the sealing tape 11 in the web 8 in one depressurized area of the linear drive cylinder 1 after is guided inside. So that the power transmission from the Piston 5 allows via the web 8 on the driven part 9.
  • the sealing tape 11 is at the front of the Cylinder tube 2 only schematically by means of a 12 indicated screw connection held stationary.
  • the sealing plug 6 is essentially cylindrical and by means of a lying in an annular groove 15 O-ring 16 against the wall 3 of the cylinder tube 2 sealed.
  • the plug 6 has two Circular flat surfaces parallel to each other at a distance 17, 18, with the flat surface 18 the interior 4 faces and the flat surface 17 with the end face of the cylinder tube 2 completes.
  • the Stopper 6 provided with a transverse bore 20 which, as emerges in particular from Fig. 2, with two each other opposite transverse bores 20, 21 of the cylinder tube 2 is aligned.
  • the transverse bores 20, 21, 22 face each other matching diameter and are from a holding tube 23 penetrated, the length of which is greater than the distance the outer sides of the cross section which is essentially rectangular Cylinder tube 2 is.
  • the holding tube is at the end 23 provided with an external thread, screwed onto the nuts 24 are.
  • the holding tube 23 has a through hole 27 and is also approximately in the middle with a total of four outlet bores 28, 29, 30, 31 provided.
  • the outlet bores 28, 29, 30, 31 open into one provided in the support tube 23 shallow groove 32.
  • Die Groove 32 communicates with one in the plug 6 provided axial opening or a channel 33 which in leads the interior 4.
  • the channel 33 extends through one at the Sealing plug 6 integrally formed damping pin 34.
  • the damping pin 34 is coaxial with the sealing plug 6 and the cylinder tube 2 arranged and extends towards piston 5, one for receiving of the damping pin provided blind hole.
  • the damping pin 34 is in connection with the blind bore provided on the piston for the outflowing Pressure medium represents an increased flow resistance, as soon as the damping pin 34 protrudes into the blind hole. So that is directed towards the plug 6 Piston movement slowed down and a hard hit of the Prevents piston on the plug 6.
  • the damping pin 34 is in the piston 5 provided provided blind hole 35, the depth of which is greater than the length of the damping pin 34 and its inner diameter larger than the outer diameter of the damping pin 34 are.
  • the holding tube 23 In order to supply and discharge pressure medium via the Holding tube 23 in the interior 4 and out of this enable, the holding tube 23 is in its through hole 27 provided with an internal thread 35 into which an outer Connection can be screwed. In addition, Avoiding pressure losses following the groove 32 of the holding tube 23 ring grooves 36, 37 provided in the O-rings are inserted.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • 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 Patentanspruchs 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 ein Kolben bewegt wird, der mit geeigneten Kraftübertragungsmitteln, wie bspw. einer Kolbenstange oder einem den seitlichen Schlitz des Führungsrohres 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 der Abdichtung der im übrigen von dem Kolben und dem Führungsrohr begrenzten Kammer. Zur Befestigung der jeweiligen Deckel an dem Führungsrohr sind meist umfangreichere Bearbeitungen des ansonsten lediglich von vorbereiteten Halbzeugen abgelängten Führungsrohres erforderlich.As linear drives are so-called from practice Linear modules are known in which in an elongated, essentially closed or laterally slotted Guide tube is moved over a fluid pressure piston with suitable power transmission means, such as one Piston rod or the side slot of the guide tube machine elements to be driven by penetrating driver operated. With all these linear drives the end of the more or less long guide tube closed a lid or closure piece. This Lid serves to seal the rest of the piston and the guide tube limited chamber. For fixing the respective cover on the guide tube are mostly more extensive edits of the otherwise only from prepared semi-finished cut to length guide tube required.

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 is a pressure fluid operated Linear actuator known. This has a longitudinal slit Guide tube that is sealed with a flexible band is and in which a piston is sealed and displaceable is stored, the side slot of the guide tube reaches through with a flat driver. At the end it is Guide tube closed with cylinder-head-like covers. For this purpose, the guide tube is provided with an external thread. Of the each cover has a corresponding internal thread on that engages with the external thread of the guide tube stands.

Bei diesem Linearantrieb ist es nach dem Ablängen des Führungsrohres erforderlich, auf die Enden desselben ein Außengewinde aufzubringen.With this linear drive it is after cutting the Guide tube required on the ends of the same Apply external thread.

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.EP 0 113 790 A1 is a pressure medium cylinder with a likewise longitudinally slit, closed at the end Cylinder known. This has a cylinder tube in which a piston is longitudinally displaceable and sealed is stored, the side slot with a reaches through the web-like part, which in connection with a Power transmission element serves as an output. End is the cylinder is closed by a cover, the one something protruding into the interior of the cylinder tube has cylindrical section. Following the cylindrical section, the diameter increases of the lid so that it has an annular shoulder. The Ring shoulder lies on the end face of the Cylinder tube. For fixing the cover to the pressure cylinder are in the end face of the cylinder barrel Threaded holes introduced into the through the cover Fastening screws are screwed in.

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. It is after in the manufacture of the cylinder tube the cutting of appropriately prepared semi-finished products required, several threaded holes over the end face distributed into the cylinder barrel. This requires a minimum wall thickness that is not less than can be.

Aus dem DE-U-7734682 ist ein Druckluft- und/oder Hydraulikzylinder mit einem zylinderförmigen Rohr bekannt, das endseitig mit einem Stopfen verschlossen ist. Der Stopfen ist mit einem Querbolzen an dem Zylinderrohr gesichert. Der Querbolzen durchgreift dabei sowohl das Zylinderrohr als auch den Stopfen bei entsprechenden Querbohrungen.From DE-U-7734682 is a compressed air and / or Known hydraulic cylinder with a cylindrical tube, which is closed at the end with a stopper. Of the Plug is with a cross bolt on the cylinder barrel secured. The cross bolt reaches through both Cylinder tube as well as the plug if appropriate Cross holes.

Außerdem ist aus der DE-A-1954888 ein pneumatischer Stellantrieb mit einem Zylinderrohr bekannt, auf das beidenends Zylinderköpfe aufgeschraubt sind. Jeder Zylinderkopf ist mit jeweils einem Kanal versehen, über den Druckmittel in das Zylinderrohr hinein und aus diesem hereus geleitet werden kann.In addition, from DE-A-1954888 is a pneumatic Actuator with a cylinder tube known on the cylinder heads are screwed on both ends. Every cylinder head is each provided with a channel over which Pressure medium into and out of the cylinder tube can be directed hereus.

Zur Herstellung einer Schraubverbindung zwischen dem Zylinderrohr und dem Zylinderkopf muß das Zylinderrohr an seinem Ende eine zylindrische Außenfläche aufweisen, die mit Gewinde versehen werden kann. Eine solche ist bei kolbenstangenlosen Zylindern meist nicht vorhanden.To establish a screw connection between the The cylinder barrel and the cylinder head must be on the cylinder barrel have a cylindrical outer surface at its end, the can be threaded. One is at rodless cylinders mostly not available.

Darüberhinaus ist aus der DE-A-2846027, die den Oberbegriff des Patentanspruchs 1 offenbart, ein Druckmittelzylinder mit einem Zylinderrohr bekannt, in dem ein Kolben abgedichtet und axial verschiebbar gelagert ist. An dem Kolben ist eine Kolbenstange befestigt, die als Kraftübertragungsmittel und Abtrieb dient. Die Kolbenstange ist aus dem Zylinderrohr herausgeführt.Furthermore, from DE-A-2846027, which is the preamble of claim 1 discloses a pressure cylinder known with a cylinder tube in which a piston sealed and axially slidably mounted. To the Piston is attached to a piston rod, which acts as a power transmission means and downforce serves. The piston rod is out led out of the cylinder barrel.

Das Zylinderrohr umschließt einen Innenraum, der an beiden Enden des Zylinderrohrs mit jeweils einem Verschlußstopfen abgedichtet ist. Jeder Verschlußstopfen weist eine Querbohrung auf, die als Durchgangsbohrung ausgebildet ist. Die Querbohrung fluchtet mit Querbohrungen, die in dem Zylinderrohr ausgebildet sind. Diese durchgreifend sind Befestigungsschrauben seitlich in die Verschlußstopfen eingeschraubt. Zwei Befestigungsschrauben halten jeweils paarweise einen Verschlußstopfen. Eine der Befestigungsschrauben ist mit einem Durchgangskanal versehen, der in einen Innenraum des Verschlußstopfens mündet. Von diesem führt ein Kanal in den Innenraum des Zylinderrohrs.The cylinder tube encloses an interior that connects to both ends of the cylinder tube, each with a plug is sealed. Each plug has a cross hole, which is a through hole is trained. The cross hole is aligned with cross holes, which are formed in the cylinder barrel. This through fastening screws are laterally in the Screwed in plug. Two fastening screws hold a sealing plug in pairs. One of the Fastening screws are provided with a through channel, which opens into an interior of the sealing plug. From this a channel leads into the interior of the Cylinder tube.

Die Befestigungsschrauben erfordern ein Innengewinde in der Querbohrung der Verschlußstopfen.The fastening screws require an internal thread in the cross hole of the sealing plug.

Davon ausgehend ist es Aufgabe der Erfindung, einen kolbenstangenlosen Linearantriebzylinder zu schaffen, dessen Aufbau eine hohe Freizügigkeit bei der Bemessung zuläßt und der einfach und kostengünstig zu fertigen ist.Proceeding from this, it is an object of the invention to to create rodless linear drive cylinders its structure has a high degree of freedom of movement in the design allows and which is easy and inexpensive to manufacture.

Diese Aufgabe wird durch einen Linearantriebzylinder mit den Merkmalen des Patentanspruches 1 gelöst.This task is accomplished by a linear drive cylinder solved with the features of 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 ein Bolzen mit einer Bohrung oder ein Halterohr sein kann, steckt dabei quer in dem Verschlußstopfen und der Querbohrung des Zylinderrohres. Das Zylinderrohr weist dabei zwei Querbohrungen auf, die sich diametral gegenüberliegen und mit der Querbohrung des Stopfens fluchten. Das einzige Befestigungsmittel wird durch die Querbohrungen durchgesteckt und darin fixiert. Dadurch wird der Abschluß des Zylinderrohres mit wenigen, kostengünstig herzustellenden und einfach zu montierenden Teilen erreicht. Die Auslaßbohrungen stellen eine Fluidverbindung zwischen der Bohrung und dem Kanal her. Somit kann dem Linearantriebszylinder Fluid über ein als Befestigungsmittel dienendes Halteelement zugeführt werden. Somit bildet das Befestigungsmittel zugleich einen Anschluß für die vorzugsweise als Druckmittel verwendete Druckluft, so daß zugleich mit der Montage des Verschlußstopfens an dem Zylinderrohr auch der Druckluftanschluß vorbereitet ist.The cylinder bore formed in the cylinder tube has, because it has the task, the sliding To guide pistons, inherently a smooth wall. This smooth wall offers a defined contact surface for the formed as a plug, without a processing of the cut to length of the cylinder tube resulting cut or face would be required. The one for fastening the sealing plug in the wall provided at least one transverse bore of the cylinder tube is easy and without much effort in it Cylinder tube can be inserted. The thickness of the Wall hardly matters. Even if the wall is relative should be thin, so thin that a stronger one Stud bolts or a larger threaded hole no longer easily drilled in the longitudinal direction in the wall the cross hole offers you a penetrating one Fasteners secure hold. The fastener, that a bolt with a hole or a Can be holding tube, is inserted transversely in the plug and the transverse bore of the cylinder tube. The cylinder barrel has two cross holes, which are diametrically opposite and with the cross hole of the Stopper cursed. The only fastener is inserted through the cross holes and fixed in it. This completes the cylinder tube with a few, inexpensive to manufacture and easy to assemble Sharing achieved. The outlet bores provide a fluid connection between the bore and the channel. Consequently can the linear drive cylinder fluid via a as a fastener serving holding element are supplied. Thus, the fastener also forms a connection for the preferably used as a pressure medium Compressed air, so that at the same time as the plug is installed also the compressed air connection on the cylinder tube is prepared.

Die Querbohrung des Verschlußstopfens kann glattwandig ausgeführt sein. Der Bolzen oder das Halterohr ist dann durch alle Querbohrungen durchgesteckt und zu beiden Seiten des Zylinderrohres mit Muttern gesichert. The cross hole of the sealing plug can be smooth-walled be executed. The bolt or the holding tube is then inserted through all cross holes and to both Secured sides of the cylinder barrel with nuts.

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 pass through the cross holes inserted and by caulking, riveting or Glue be secured in it. This is regardless whether the bolt is full or hollow, i.e. designed as a holding tube is.

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 coaxial to that Be cylindrical bore. This can be through a coaxial to the cylinder tube and the plug provided damping pin through extend from a corresponding one on the piston provided blind hole can be added. Of the Damping pin connects in conjunction with that on the Piston provided blind bore for the outflowing Pressure medium an increased flow resistance as soon as the pin enters the blind hole protrudes. So that is directed to the plug Piston movement slowed down and a hard hit of the piston on the plug prevented.

Der von dem Zylinderrohr umschlossene Innenraum ist zylinderförmig, um eine gute Abdichtung des Kolbens gegenüber der Wandung des Zylinderrohres zu ermöglichen. Auch der Verschlußstopfen ist 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. The of the interior of the cylinder tube is cylindrical, to ensure a good seal between the piston and the wall to enable the cylinder tube. The plug is also cylindrical. For sealing the plug against the cylinder barrel a seal is provided. This can be done in simpler Way in a provided on the plug Ring groove inserted O-ring. If this seal between the transverse bore and the one facing the piston End face of the sealing plug is arranged, superfluous an additional seal of the fastener against the cylinder barrel.

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 inexpensive manufacture, in particular with higher quantities, results when the sealing plug is a plastic injection molded part. The Sealing plug with the damping pin in one piece be trained, which reduces the manufacturing effort. However, it is also possible to use the plug as Automat parts, 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 und
Fig. 2
den Linearantriebszylinder nach Fig. 1 in teilweise entlang der Schnittlinie II-II geschnittenen Darstellung mit Blickrichtung auf die Stirnseite.
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 and
Fig. 2
the linear drive cylinder of FIG. 1 in a partially cut along the section line II-II with a view towards the front.

In Fig. 1 ist ein als Linearmodul oder Linearantrieb dienender 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.In Fig. 1 is as a linear module or linear drive serving linear drive cylinder 1 shown, in which a cylinder tube made of extruded aluminum 2 forms a base body. With a smooth one Wall 3 describing the cylinder closes the cylinder tube 2 an interior 4. In this is a piston 5 axially displaceable and sealed against the wall 3 stored. The end of the cylinder tube 2 is by a plug 6 closed, only in Fig. 1 one end of the cylinder tube 2 is shown.

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 is, as in particular, made of 2 can be seen, provided with a longitudinal slot 7, that of one attached to the piston 5, in detail Web 8 is not shown.

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 with a substantially plate or cuboidal driven part 9 connected along the longitudinal extent 10 of the linear drive cylinder 1 a Carry out linear movement according to the piston movement can.

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 through a sealing tape 11 for the overpressures prevailing in the interior 4 are sealed, the sealing tape 11 in the web 8 in one depressurized area of the linear drive cylinder 1 after is guided inside. So that the power transmission from the Piston 5 allows via the web 8 on the driven part 9. The sealing tape 11 is at the front of the Cylinder tube 2 only schematically by means of a 12 indicated screw connection held stationary.

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 by means of a lying in an annular groove 15 O-ring 16 against the wall 3 of the cylinder tube 2 sealed. The plug 6 has two Circular flat surfaces parallel to each other at a distance 17, 18, with the flat surface 18 the interior 4 faces and the flat surface 17 with the end face of the cylinder tube 2 completes.

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 20, 21 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 is the Stopper 6 provided with a transverse bore 20 which, as emerges in particular from Fig. 2, with two each other opposite transverse bores 20, 21 of the cylinder tube 2 is aligned. The transverse bores 20, 21, 22 face each other matching diameter and are from a holding tube 23 penetrated, the length of which is greater than the distance the outer sides of the cross section which is essentially rectangular Cylinder tube 2 is. The holding tube is at the end 23 provided with an external thread, screwed onto the nuts 24 are.

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 hole 27 and is also approximately in the middle with a total of four outlet bores 28, 29, 30, 31 provided.

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 in dem Verschlußstopfen 6 vorgesehenen axialen Öffnung oder einem Kanal 33, der in den Innenraum 4 führt.The outlet bores 28, 29, 30, 31 open into one provided in the support tube 23 shallow groove 32. Die Groove 32 communicates with one in the plug 6 provided axial opening or a channel 33 which in leads the interior 4.

Der Kanal 33 erstreckt sich dabei durch einen an dem Verschlußstopfen 6 angeformten Dämpfungszapfen 34.The channel 33 extends through one at the Sealing plug 6 integrally formed damping pin 34.

Der Dämpfungszapfen 34 ist koaxial zu dem Verschlußstopfen 6 und dem Zylinderrohr 2 angeordnet und erstreckt sich in Richtung auf den Kolben 5 zu, der eine zur Aufnahme des Dämpfungszapfens vorgesehene Sackbohrung aufweist.The damping pin 34 is coaxial with the sealing plug 6 and the cylinder tube 2 arranged and extends towards piston 5, one for receiving of the damping pin provided blind hole.

Der Dämpfungszapfen 34 stellt in Verbindung mit der an dem Kolben vorgesehenen Sackbohrung für das ausströmende Druckmittel einen vergrößerten Strömungswiderstand dar, sobald der Dämpfungszapfen 34 in die Sackbohrung ragt. Damit wird die auf den Verschlußstopfen 6 zu gerichtete Kolbenbewegung abgebremst und ein hartes Aufschlagen des Kolbens an dem Verschlußstopfen 6 verhindert.The damping pin 34 is in connection with the blind bore provided on the piston for the outflowing Pressure medium represents an increased flow resistance, as soon as the damping pin 34 protrudes into the blind hole. So that is directed towards the plug 6 Piston movement slowed down and a hard hit of the Prevents piston on the plug 6.

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.The damping pin 34 is in the piston 5 provided provided blind hole 35, the depth of which is greater than the length of the damping pin 34 and its inner diameter larger than the outer diameter of the damping pin 34 are.

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 supply and discharge pressure medium via the Holding tube 23 in the interior 4 and out of this enable, the holding tube 23 is in its through hole 27 provided with an internal thread 35 into which an outer Connection can be screwed. In addition, Avoiding pressure losses following the groove 32 of the holding tube 23 ring grooves 36, 37 provided in the O-rings are inserted.

Claims (19)

  1. A linear drive cylinder (1) with a cylindrical tube (2) which at at least one end is provided with two mutually opposed and aligned transverse bores (21,22), with a piston (5) which is mounted displaceably in a longitudinal direction in the inner chamber (4) of the cylindrical tube (2), with a force-transmitting means (8) which forms an output, which is connected to the piston (5) and which extends out of the cylindrical tube (2), with at least one end plug (6) which at the end is fitted fluidtightly in the inner chamber (4) of the cylindrical tube (2) and has a transverse bore (20) which is in the form of a through-bore and is aligned with the transverse bores (21,22) of the cylindrical tube (2), and which end plug has a passage (33) which is in communication with its transverse bore (20) and which discharges into the inner chamber (4), and with at least one elongate fastening means (23) which both extends transversely to the longitudinal direction of the cylindrical tube (2) into the transverse bore (20) of the end plug (6) and passes through a transverse bore (21) of the cylindrical tube (2), wherein in the end plug (6) at least one passage (33) is provided which connects the transverse bore (20) of the end plug with the inner chamber (4) surrounded by the cylindrical tube (2), and wherein the fastening means (23) is fitted with the end plug (6) fluidtightly in its transverse bore (20) and has a bore (27), characterised in that the bore (27) of the fastening means (23) is in communication with the passage (33) via an outlet bore (28), wherein the fastening means (23) passes both through the two transverse bores (21,22) of the cylindrical tube (2) and through the transverse bore of the end plug in such a way that the end plug (6) is retained non-displaceably in the inner chamber (4).
  2. A linear drive cylinder according to Claim 1, characterised in that the fastening means (23) is provided with an annular groove (32) and has two annular grooves (36,37) which are adjacent the annular groove (32) and which serve to accommodate a respective O-ring for sealing the fastening means (23) with respect to the smooth-walled transverse bore (20), wherein the annular groove (32) communicates with the passage (33).
  3. A linear drive cylinder according to Claim 1, characterised in that the transverse bore (20) of the end plug (6) is smooth-walled.
  4. A linear drive cylinder according to Claim 1, characterised in that the transverse bore (20) of the end plug (6) is provided with an internal thread.
  5. A linear drive cylinder according to Claim 1, characterised in that the fastening means (23) is a bolt which passes through the cylindrical tube (2) and the end plug (6) and which is secured with at least one nut (24).
  6. A linear drive cylinder according to Claims 2 and 3, characterised in that the bolt (23) extends into the end plug (6) and is in engagement with an internal thread which is provided in the transverse bore (21) of the cylindrical tube (2).
  7. A linear drive cylinder according to Claim 1, characterised in that the fastening means (23) is staked to the cylindrical tube (2).
  8. A linear drive cylinder according to Claim 1, characterised in that the fastening means (23) is rivetted to the cylindrical tube (2).
  9. A linear drive cylinder according to Claim 1, characterised in that the fastening means (23) is bonded to the cylindrical tube (2) and/or to the end plug (6).
  10. A linear drive cylinder according to Claim 1, characterised in that the passage (33) is a bore disposed coaxially to the cylindrical tube (2).
  11. A linear drive cylinder according to Claim 1, characterised in that a damping peg (34), which is disposed coaxially to the cylindrical tube (2) and which is directed towards the piston (5), is provided on the end plug (6).
  12. A linear drive cylinder according to Claims 10 and 11, characterised in that the bore extends through the damping peg (34).
  13. A linear drive cylinder according to Claim 1, characterised in that the end plug (6) is substantially cylindrical.
  14. A linear drive cylinder according to Claim 1, characterised in that the end plug (6) is provided with a seal (16) for effecting sealing with respect to the cylindrical tube (2).
  15. A linear drive cylinder according to Claim 14, characterised in that the seal (16) is an O-ring (16) inserted into an annular groove (is) provided on the end plug (6).
  16. A linear drive cylinder according to Claim 14, characterised in that the seal (16) is disposed on the end plug (6) between the transverse bore (20) and an end face (18) of the end plug (6) facing the piston (5).
  17. A linear drive cylinder according to Claim 1, characterised in that the cylindrical tube (2) has a continuous inner chamber (4) and a longitudinal slot (7) extending along its entire length, and/or in that the longitudinal slot (7) is sealed by a flexible sealing strip (11) retained stationary at the end with respect to the cylindrical tube (2).
  18. A linear drive cylinder according to Claim 1, characterised in that the end plug (6) is an injection-moulded component.
  19. A linear drive cylinder according to Claim 11, characterised in that the end plug (6) is formed integrally with the damping peg (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 EP0662568A1 (en) 1995-07-12
EP0662568B1 true EP0662568B1 (en) 1999-08-11

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ID=6507661

Family Applications (1)

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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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JP5757976B2 (en) * 2013-06-12 2015-08-05 株式会社コガネイ Fluid pressure cylinder
JP5746281B2 (en) * 2013-07-26 2015-07-08 Ｋｙｂ−Ｙｓ株式会社 Fluid pressure cylinder
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ATE183287T1 (en) 1999-08-15
DE4400483A1 (en) 1995-07-20
DE4400483C2 (en) 1996-12-19
DE59408614D1 (en) 1999-09-16
EP0662568A1 (en) 1995-07-12
US5507218A (en) 1996-04-16

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