EP0177850B1 - Rodless hydraulic ram - Google Patents

Rodless hydraulic ram Download PDF

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Publication number
EP0177850B1
EP0177850B1 EP85112239A EP85112239A EP0177850B1 EP 0177850 B1 EP0177850 B1 EP 0177850B1 EP 85112239 A EP85112239 A EP 85112239A EP 85112239 A EP85112239 A EP 85112239A EP 0177850 B1 EP0177850 B1 EP 0177850B1
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EP
European Patent Office
Prior art keywords
cylinder housing
rolling
working cylinder
brake
power consumer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85112239A
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German (de)
French (fr)
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EP0177850A1 (en
Inventor
Dieter Mai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knorr Bremse AG
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Knorr Bremse AG
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Publication date
Priority claimed from DE19823229305 external-priority patent/DE3229305A1/en
Application filed by Knorr Bremse AG filed Critical Knorr Bremse AG
Publication of EP0177850A1 publication Critical patent/EP0177850A1/en
Application granted granted Critical
Publication of EP0177850B1 publication Critical patent/EP0177850B1/en
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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
    • F15B15/082—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
    • F15B15/084—Characterised by the construction of the motor unit the motor being of the rodless piston type, e.g. with cable, belt or chain

Definitions

  • the invention relates to a rodless cylinder according to the preamble of claim 1.
  • Rod-free band and slot working cylinders are known (EP-A 29188), which have force transducers guided on the outside of the cylinder body which they grip, which are mechanically connected to the piston.
  • the mechanical connection takes place via a circumferential band, which runs over rollers arranged on the end faces of the band cylinder and connects the piston to the power take-off, or, in the case of the slit cylinder, via a rigid holder which projects through a sealable slot in the cylinder body.
  • a brake device is integrated in the power take-off, which concentrically surrounds the cylinder body with at least one brake pad.
  • the known braking device can be designed as a bellows, which is fastened to the cylindrical inner wall of the power take-off comprising the cylinder body with play and which concentrically surrounds the cylinder tube.
  • the bellows is expanded by supplying a fluid, the brake linings coming to bear against the cylindrical outer circumference of the cylinder tube for braking or stopping the force transducer moved by the piston.
  • the object of the invention is to provide an improved rodless cylinder of the type mentioned, which takes up only a small space and has a relatively small diameter with simple manufacture and assembly, and whose easily movable power take-off can be easily braked and positioned by the braking device.
  • the exemplary embodiments show working cylinders according to the invention in cross section through the power consumer.
  • the same reference symbols in the figures denote the same or corresponding parts.
  • the exemplary embodiments are band or rope cylinders.
  • so-called slot cylinders can also be provided, the working cylinder of which is provided with a slot-shaped cylinder wall opening, through which a part connecting the power consumer to the piston engages and which can be sealed by a cover strip.
  • the cylinder body 1 of a band cylinder forming a cylinder tube is designed, for example, as an octagonal tube with flat surfaces.
  • a sled-like power take-off 8 encompassing it is slidably arranged on the octagonal cylinder body 1.
  • the power take-off 8 is connected in a manner known per se via a circulating belt to a piston arranged in the cylinder body 1. Neither the band nor the piston are shown in Fig. 1.
  • the band can be divided in a known manner into two sections, one section of which engages with its one end on the front end face of the power take-off 8 and is pressure-tightly guided via a first roller at the front end of the cylinder body through a sealed slot in the front cylinder head in order to to attack its other end on one side of the piston. Accordingly, the other section of the band engages with its one end on the opposite end face of the power take-off 8 and is pressure-tightly guided via a second roller at the rear end of the cylinder body through a further sealed slot in the rear cylinder head in order to have its other end on the opposite other side of the Attack piston.
  • the axial length, not shown in FIG. 1, of the force transducer 8 can be selected in accordance with the axial length of the force transducer of known band cylinders.
  • the cylinder body does not have to have the profile shape shown in Fig. 1, it can rather be profiled in different ways, the profile surfaces which form friction surfaces for the installation of a braking device, which can be integral with the cylinder body or can belong to separate housing or profile parts that are held on the cylinder body.
  • the power take-off 8 contains the braking device, which does not include the cylinder body 1.
  • a wedge-shaped shape of the friction or braking surfaces of the braking device can be advantageous, since this increases the available braking surface and the Wedge effect depending on the selected wedge angle can be used for brake reinforcement. It is then expedient to have springs which move the brake bodies back into their release position after braking.
  • the forces acting on the force collector 8 can essentially be absorbed by a profile part on the cylinder body 1, the surface dimensions of which are independent of the diameter of the cylinder body 1.
  • the profile surfaces are independent of the diameter of the cylinder body 1 can be selected in terms of its area size and area shape in such a way that an optimal braking and positioning of the force transducer 8 is possible, the friction influences of the braking device in the released state also exerting a largely minor influence on the easy displaceability of the force transducer 8.
  • the power take-off 8 is supported with four wheels or rollers 31 to 34 on diametrically opposite surfaces of the octagonal cylinder body 1 forming runways.
  • a pressure body 36 is displaceable radially to the piston body 1.
  • the pressure body 36 has wedge surfaces drawn inwards on the piston body side for carrying a wedge-shaped brake lining 37.
  • the pressure body 36 carries a pressure pad-like sealing element 38, the outer edge of which is supported lip-like on the inner wall of the recess 35.
  • the profile surface 28 of the cylinder body 1 between two adjacent profile surfaces serving as rolling surfaces for the force transducer 8 carries an angled profile plate 39 which forms wedge-shaped contact surfaces for the wedge-shaped brake pads 37.
  • the flat profile surface 28 itself can also serve as a contact surface for the braking device if a wedge-shaped braking device is dispensed with.
  • the profiled sheet 39 can be an integral part of the profile body 1, it can then have two profile surfaces, which serve on the one hand for the rotationally secure guidance of the power take-off 8, and on the other hand serve as a system for the braking device 36 to 38 integrated in the power take-off 8.
  • the power take-off 8 comprises the cylinder body 1 in the example, the special shape of the profile means that the power take-off 8 is secured against rotation, so that special devices for securing the power take-off against rotation are no longer required.
  • a pressure medium source is connected to actuate the braking devices via at least one flexible hose, not shown, and a connection bore 27 to the pressure-tight space 35.
  • the part of the power take-off with the braking device 35 to 38 diametrically opposite the part of the power take-off has a similar braking device, the two braking devices acting spatially against each other during braking.
  • rollers or wheels 31 to 34 can be replaced by slideways or sliding linings, which are to be attached to the profile surfaces of the cylinder body or, accordingly, to the power consumer.
  • the power take-off 8 does not necessarily have to be guided by means of four wheels or rollers or along four slideways.
  • three rollers or slideways, which are offset by 120 ° to each other, can be sufficient.
  • the cylinder body 1 has a wedge-shaped profile part 40 which is placed on the cylinder body 1 or forms a unit with it.
  • the wedge-shaped profile part 40 has such a shape that the wedge-shaped opposite inner surfaces of the profile part 40 serve as contact surfaces of a wedge-shaped braking device 35 to 38, the brake pads 37 of which, in contrast to the embodiment according to FIG are arranged approximately correspondingly wedge-shaped outward.
  • the outer counter surfaces 41 and 42 on the profile part 40 serve as anti-rotation roller or slideways for the power take-off 8, which is displaceably guided thereon with rollers or lubricants.
  • Two corresponding rollers or wheels 43 and 44 are shown in dashed lines in FIG. 2.
  • the force collector 8 according to FIG. 2 is therefore guided by means of two rollers or wheels or by means of two slideways.
  • the invention is suitable for band or rope cylinders as well as for so-called slotted rodless working cylinders.
  • the tubular profiles of the cylinder bodies can be produced from aluminum using the extrusion process; the exemplary embodiments show basic profile examples, the working cylinders made from these, without piston rods, requiring only a small overall height.

Description

Die Erfindung bezieht sich auf einen kolbenstangenlosen Arbeitszylinder gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a rodless cylinder according to the preamble of claim 1.

Es sind kolbenstangenlose Band- und Schlitz-Arbeitszylinder bekannt (EP-A 29188), die außen auf dem von ihnen umgriffenen Zylinderkörper geführte Kraftabnehmer aufweisen, welche mechanisch mit dem Kolben in Verbindung stehen. Die mechanische Verbindung erfolgt über ein umlaufendes Band, welches über an den Stirnseiten des Bandzylinders angeordnete Rollen läuft und den Kolben mit dem Kraftabnehmer verbindet, oder beim Schlitzzylinder über eine starre Halterung, die durch einen abdichtbaren Schlitz im Zylinderkörper ragt. In den Kraftabnehmer ist dabei eine Bremseinrichtung integriert, die den Zylinderkörper mit wenigstens einem Bremsbelag konzentrisch umfaßt. Die bekannte Bremseinrichtung kann als Balg ausgebildet sein, der an der den Zylinderkörper mit Spiel umfassenden, zylindrischen Innenwand des Kraftabnehmers befestigt ist und das Zylinderrohr konzentrisch umfaßt. Durch Zuführung eines Fluids wird der Balg aufgeweitet, wobei die Bremsbeläge zum Bremsen oder Anhalten des durch den Kolben bewegten Kraftabnehmers am zylindrischen Außenumfang des Zylinderrohres zur Anlage kommen.Rod-free band and slot working cylinders are known (EP-A 29188), which have force transducers guided on the outside of the cylinder body which they grip, which are mechanically connected to the piston. The mechanical connection takes place via a circumferential band, which runs over rollers arranged on the end faces of the band cylinder and connects the piston to the power take-off, or, in the case of the slit cylinder, via a rigid holder which projects through a sealable slot in the cylinder body. A brake device is integrated in the power take-off, which concentrically surrounds the cylinder body with at least one brake pad. The known braking device can be designed as a bellows, which is fastened to the cylindrical inner wall of the power take-off comprising the cylinder body with play and which concentrically surrounds the cylinder tube. The bellows is expanded by supplying a fluid, the brake linings coming to bear against the cylindrical outer circumference of the cylinder tube for braking or stopping the force transducer moved by the piston.

Für Schlitzzylinder wurde gemäß der EP-A 68 088 und der gleichlautenden DE-A 31 24 915 bereits vorgeschlagen, am Zylinderkörper längsverlaufende, profilierte Gleitbahnen vorzusehehn, an welchen am Kraftabnehmer justierbar angeordnete Gleitschuhe geführt sind, wodurch der Kraftabnehmer eine verdrehsichere Längsführung erfährt. Weiterhin ist es für Schlitzzylinder aus der DE-B 707 679 bekannt, den Kraftabnehmer mittels in Rollbahnen eines einen oder mehrere Zylinderkörper tragenden Gestells eingreifende Rollen zu führen; die DE-A 24 04 244 zeigt eine ähnliche Führung mittels in Rollbahnen eingreifenden Wälzlagern für Bandzylinder. Keiner dieser Zylinder ist mit einer am Kraftabnehmer angeorndeten Bremseinrichtung ausgestattet.According to EP-A 68 088 and the equivalent DE-A 31 24 915, it has already been proposed for slotted cylinders to provide profiled slideways which run longitudinally on the cylinder body and on which slide shoes which are arranged on the power take-off are guided, whereby the power take-off is guided in a rotationally secure manner. Furthermore, it is known for slot cylinders from DE-B 707 679 to guide the power take-off by means of rollers engaging in roller tracks of a frame carrying one or more cylinder bodies; DE-A 24 04 244 shows a similar guidance by means of roller bearings for band cylinders engaging in roller conveyors. None of these cylinders is equipped with a braking device arranged on the power consumer.

Aufgabe der Erfindung ist es, einen verbesserten kolbenstangenlosen Zylinder der eingangs genannten Art anzugeben, der bei einfacher Fertigung und Montage nur einen geringen Raum beansprucht und einen relativ kleinen Durchmesser aufweist, und dessen leichtbeweglicher Kraftabnehmer durch die Bremseinrichtung gut abbrems- und positionierbar ist.The object of the invention is to provide an improved rodless cylinder of the type mentioned, which takes up only a small space and has a relatively small diameter with simple manufacture and assembly, and whose easily movable power take-off can be easily braked and positioned by the braking device.

Diese Aufgabe wird erfindungsgemäß mit den kennzeichnenden Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte Ausführungen und Weiterbildungen der Erfindung ergeben sich aus den Merkmalen der Unteransprüche und/oder den nachstehenden Beschreibungen für Ausführungsbeispiele, die in einer zugehörigen Zeichnung nur skizzenhaft angedeutet sind. Hierin zeigt

  • Fig. 1 einen Querschnitt durch ein erstes Ausführungsbeispiel und
  • Fig. 2 einen Querschnitt durch ein zweites Ausführungsbeispiel ähnlich dem nach Fig. 1.
This object is achieved with the characterizing features of claim 1. Advantageous embodiments and further developments of the invention result from the features of the subclaims and / or the descriptions below for exemplary embodiments which are only sketched out in an associated drawing. Here shows
  • Fig. 1 shows a cross section through a first embodiment and
  • 2 shows a cross section through a second embodiment similar to that of FIG. 1st

Die Ausführungsbeispiele zeigen erfindungsgemäße Arbeitszylinder im Querschnitt durch den Kraftabnehmer. Gleiche Bezugszeichen in den Figuren bezeichnen gleiche oder entsprechende Teile. Bei den Ausführungsbeispielen handelt es sich um Band- bzw. Seilzylinder. Es können jedoch auch soggenannte Schlitzzylinder vorgesehen sein, deren Arbeitszylinder mit einer schlitzförmigen Zylinderwanddurchbrechnung versehen ist, durch welche ein den Kraftabnehmer mit dem Kolben verbindendes Teil greift und welche durch ein Abdeckband abdichtbar ist.The exemplary embodiments show working cylinders according to the invention in cross section through the power consumer. The same reference symbols in the figures denote the same or corresponding parts. The exemplary embodiments are band or rope cylinders. However, so-called slot cylinders can also be provided, the working cylinder of which is provided with a slot-shaped cylinder wall opening, through which a part connecting the power consumer to the piston engages and which can be sealed by a cover strip.

Nach Fig. 1 ist der ein Zylinderrohr bildende Zylinderkörper 1 eines Bandzylinders beispielsweise als Achtkantrohr mit planen Flächen ausgebildet. Auf dem achtkantigen Zylinderkörper 1 ist ein diesen umgreifender, schlittenartiger Kraftabnehmer 8 verschieblich angeordnet. Der Kraftabnehmer 8 steht in an sich bekannter Weise über ein umlaufendes Band mit einem im Zylinderkörper 1 angeordneten Kolben in Verbindung. Weder das Band noch der Kolben sind in Fig. 1 dargestellt. Das Band kann in bekannter Weise in zwei Abschnitte geteilt sein, von denen der eine Abschnitt mit seinem einen Ende an der vorderen Stirnseite des Kraftabnehmers 8 angreift und über eine erste Rolle am vorderen Zylinderkörperende durch einen abgedichteten Schlitz im vorderen Zylinderkopf druckdicht geführt ist, um mit seinem anderen Ende an der einen Seite des Kolbens anzugreifen. Entsprechend greift der andere Abschnitt des Bandes mit seinem einen Ende an der entgegengesetzten Stirnseite des Kraftabnehmers 8 an und ist über eine zweite Rolle am hinteren Zylinderkörperende durch einen weiteren abgedichteten Schlitz im hinteren Zylinderkopf druckdicht geführt, um mit seinem anderen Ende an der gegenüberliegenden anderen Seite des Kolbens anzugreifen.1, the cylinder body 1 of a band cylinder forming a cylinder tube is designed, for example, as an octagonal tube with flat surfaces. On the octagonal cylinder body 1, a sled-like power take-off 8 encompassing it is slidably arranged. The power take-off 8 is connected in a manner known per se via a circulating belt to a piston arranged in the cylinder body 1. Neither the band nor the piston are shown in Fig. 1. The band can be divided in a known manner into two sections, one section of which engages with its one end on the front end face of the power take-off 8 and is pressure-tightly guided via a first roller at the front end of the cylinder body through a sealed slot in the front cylinder head in order to to attack its other end on one side of the piston. Accordingly, the other section of the band engages with its one end on the opposite end face of the power take-off 8 and is pressure-tightly guided via a second roller at the rear end of the cylinder body through a further sealed slot in the rear cylinder head in order to have its other end on the opposite other side of the Attack piston.

Die in Fig. 1 nicht gezeigte, axiale Länge des Kraftabnehmers 8 kann entsprechend der axialen Länge der Kraftabnehmer bekannter Bandzylinder gewählt sein.The axial length, not shown in FIG. 1, of the force transducer 8 can be selected in accordance with the axial length of the force transducer of known band cylinders.

Der Zylinderkörper muß nicht die in Fig. 1 gezeigte Profilgestalt aufweisen, er kann vielmehr in verschiedener Weise profiliert sein, wobei die Profilflächen, die zur Anlage einer Bremseinrichtung Reibflächen bilden, die einstückig mit dem Zylinderkörper sein oder zu gesonderten Gehäuse- bzw. Profilteilen gehören können, die am Zylinderkörper festgehalten sind. Der Kraftabnehmer 8 beinhaltet die Bremseinrichtung, welche den Zylinderkörper 1 nicht umfaßt. Eine keilförmige Gestalt der Reib- bzw. Bremsflächen der Bremseinrichtung kann vorteilhaft sein, da hierdurch die zur Verfügung stehende Bremsfläche vergrößert wird und die Keilwirkung in Abhängigkeit von dem gewählten Keilwinkel zur Bremsverstärkung ausgenutzt werden kann. Es sind dann zweckmäßigerweise Federn vorhanden, die die Bremskörper nach einer Bremsung in ihre Lösestellung zurückbewegen.The cylinder body does not have to have the profile shape shown in Fig. 1, it can rather be profiled in different ways, the profile surfaces which form friction surfaces for the installation of a braking device, which can be integral with the cylinder body or can belong to separate housing or profile parts that are held on the cylinder body. The power take-off 8 contains the braking device, which does not include the cylinder body 1. A wedge-shaped shape of the friction or braking surfaces of the braking device can be advantageous, since this increases the available braking surface and the Wedge effect depending on the selected wedge angle can be used for brake reinforcement. It is then expedient to have springs which move the brake bodies back into their release position after braking.

Anhand der Ausführungsbeispiele wird außerdem deutlich, daß die auf den Kraftabnehmer 8 einwirkenden Kräfte im wesentlichen von einem Profilteil am Zylinderkörper 1 aufgenommen werden können, das in seinen Flächenabmessungen unabhängig ist von dem Durchmesser des Zylinderkörpers 1. Die Profilflächen sind dabei unabhängig vom Durchmesser des Zylinderkörpers 1 in ihrer Flächengröße und Flächengestalt derart wählbar, daß eine optimale Abbremsung und Positionierung des Kraftabnehmers 8 möglich ist, wobei außerdem die Reibungseinflüsse der Bremseinrichtung im gelösten Zustand auf die leichte Verschieblichkeit des Kraftabnehmers 8 einen weitgehend geringen Einfluß ausüben.On the basis of the exemplary embodiments, it is also clear that the forces acting on the force collector 8 can essentially be absorbed by a profile part on the cylinder body 1, the surface dimensions of which are independent of the diameter of the cylinder body 1. The profile surfaces are independent of the diameter of the cylinder body 1 can be selected in terms of its area size and area shape in such a way that an optimal braking and positioning of the force transducer 8 is possible, the friction influences of the braking device in the released state also exerting a largely minor influence on the easy displaceability of the force transducer 8.

Mehr im einzelnen zeigt Fig. 1, daß der Kraftabnehmer 8 sich mit vier Rädern bzw. Rollen 31 bis 34 an diametral gegenüberliegenden, Rollbahnen bildenden Flächen des achteckigen Zylinderkörpers 1 abstützt. Im oberen Teil des Kraftabnehmers 8 ist ein druckdichter Raum 35 vorhanden, in dem ein Druckkörper 36 radial zum Kolbenkörper 1 verschieblich ist. Der Druckörper 36 besitzt kolbenkörperseitig nach innen gezogene Keilflächen zum Tragen eines keilförmigen Bremsbelages 37. Andererseits trägt der Druckkörper 36 ist ein druckkissenartiges Abdichtungselement 38, dessen äußerer Rand sich lippenartig an der Innenwand der Ausnehmung 35 abstützt.1 shows that the power take-off 8 is supported with four wheels or rollers 31 to 34 on diametrically opposite surfaces of the octagonal cylinder body 1 forming runways. In the upper part of the power take-off 8 there is a pressure-tight space 35 in which a pressure body 36 is displaceable radially to the piston body 1. The pressure body 36 has wedge surfaces drawn inwards on the piston body side for carrying a wedge-shaped brake lining 37. On the other hand, the pressure body 36 carries a pressure pad-like sealing element 38, the outer edge of which is supported lip-like on the inner wall of the recess 35.

Die Profilfläche 28 des Zylinderkörpers 1 zwischen zwei benachbarten, als Rollflächen für den Kraftabnehmer 8 dienenden Profilflächen trägt ein winkliges Profilblech 39, das keilförmige Anlageflächen für die keilförmigen Bremsbeläge 37 bildet. Abweichend hierzu kann auch die flache Profilfläche 28 selbst als Anlagefläche für die Bremseinrichtung dienen, wenn auf eine keilförmige Bremseinrichtung verzichtet wird. Außerdem kann das Profilblech 39 integraler Bestandteil des Profilkörpers 1 sein, es kann dann zwei Profilflächen aufweisen, die einerseits zur drehsicheren Führung des Kraftabnehmers 8 dienen, zum anderen als Anlage für die in den Kraftabnehmer 8 integrierte Bremseinrichtung 36 bis 38 dienen. Obwohl der Kraftabnehmer 8 im Beispielsfalle den Zylinderkörper 1 umfaßt, ist aufgrund dessen besonderer Profilgestalt eine verdrehsichere Führung des Kraftabnehmers 8 gegeben, so daß besondere Vorrichtungen zur Verdrehsicherung des Kraftabnehmers nicht mehr erforderlich sind.The profile surface 28 of the cylinder body 1 between two adjacent profile surfaces serving as rolling surfaces for the force transducer 8 carries an angled profile plate 39 which forms wedge-shaped contact surfaces for the wedge-shaped brake pads 37. Deviating from this, the flat profile surface 28 itself can also serve as a contact surface for the braking device if a wedge-shaped braking device is dispensed with. In addition, the profiled sheet 39 can be an integral part of the profile body 1, it can then have two profile surfaces, which serve on the one hand for the rotationally secure guidance of the power take-off 8, and on the other hand serve as a system for the braking device 36 to 38 integrated in the power take-off 8. Although the power take-off 8 comprises the cylinder body 1 in the example, the special shape of the profile means that the power take-off 8 is secured against rotation, so that special devices for securing the power take-off against rotation are no longer required.

Eine nicht dargestellte Druckmittelquelle ist zum Betätigen der Bremseinrichtungen über wenigstens einen nicht dargestellten, flexiblen Schlauch und eine Anschlußbohrung 27 an den druckdichten Raum 35 angeschlossen.A pressure medium source, not shown, is connected to actuate the braking devices via at least one flexible hose, not shown, and a connection bore 27 to the pressure-tight space 35.

Weiterhin kann der Kraftabnehmer nach Fig. 1 auch symmetrisch ausgebildet werden, so daß der dem Teil des Kraftabnehmers mit der Bremseinrichtung 35 bis 38 diametral gegenüberliegende Teil des Kraftabnehmers eine gleichartige Bremseinrichtung aufweist, wobei die beiden Bremseinrichtungen bei einer Bremsung räumlich gegeneinander wirken.1 can also be formed symmetrically, so that the part of the power take-off with the braking device 35 to 38 diametrically opposite the part of the power take-off has a similar braking device, the two braking devices acting spatially against each other during braking.

Abweichend zur beschriebenen Ausführungsform können die Rollen oder Räder 31 bis 34 durch Gleitbahnen oder Gleitbeläge ersetzt sein, die an den Profilflächen des Zylinderkörpers oder auch entsprechend am Kraftabnehmer anzubringen sind. Außerdem muß der Kraftabnehmer 8 nicht notwendigerweise mittels vier Rädern oder Rollen bzw. entlang von vier Gleitbahnen geführt werden. So können in einer ähnlichen Konstruktion auch schon drei Rollen bzw. Gleitbahnen ausreichend sein, die zueinander um 120° versetzt angeordnet sind.In a departure from the described embodiment, the rollers or wheels 31 to 34 can be replaced by slideways or sliding linings, which are to be attached to the profile surfaces of the cylinder body or, accordingly, to the power consumer. In addition, the power take-off 8 does not necessarily have to be guided by means of four wheels or rollers or along four slideways. In a similar construction, three rollers or slideways, which are offset by 120 ° to each other, can be sufficient.

Die Ausführung des Arbeitszylinders nach Fig. 2 ist ähnlich derjenigen nach Fig. 1. Der wesentliche Unterschied besteht darin, daß der Zylinderkörper 1 ein keilförmiges Profilteil 40 aufweist, das auf den Zylinderkörper 1 aufgesetzt ist oder mit diesem eine Einheit bildet. Das keilförmige Profilteil 40 weist eine derartige Gestalt auf, daß die keilförmig einander gegenübersthenden Innenflächen des Profilteiles 40 als Anlageflächen einer keilförmigen Bremseinrichtung 35 bis 38 dienen, deren Bremsbeläge 37 im Gegensatz zu der Ausführung nach Fig. 1 bezüglich des Druckkörpers 36 nicht keilförmig eingezogen, sondern etwa entsprechend keilförmig nach außen gerichtet angeordnet sind. Die äußeren Gegenflächen 41 und 42 an dem Profilteil 40 dienen als verdrehsichernde Roll- oder Gleitbahnen für den Kraftabnehmer 8, der an diesen mit Rollen oder Gleitmitteln verschieblich geführt ist. Zwei entsprechende Rollen bzw. Räder 43 und 44 sind in Fig. 2 gestrichelt dargestellt. Im Gegensatz zu der Ausführung nach Fig. 1 ist der Kraftabnehmer 8 nach Fig. 2 also mittels zweier Rollen oder Räder bzw. mittels zweier Gleitbahnen geführt.2 is similar to that of FIG. 1. The main difference is that the cylinder body 1 has a wedge-shaped profile part 40 which is placed on the cylinder body 1 or forms a unit with it. The wedge-shaped profile part 40 has such a shape that the wedge-shaped opposite inner surfaces of the profile part 40 serve as contact surfaces of a wedge-shaped braking device 35 to 38, the brake pads 37 of which, in contrast to the embodiment according to FIG are arranged approximately correspondingly wedge-shaped outward. The outer counter surfaces 41 and 42 on the profile part 40 serve as anti-rotation roller or slideways for the power take-off 8, which is displaceably guided thereon with rollers or lubricants. Two corresponding rollers or wheels 43 and 44 are shown in dashed lines in FIG. 2. In contrast to the embodiment according to FIG. 1, the force collector 8 according to FIG. 2 is therefore guided by means of two rollers or wheels or by means of two slideways.

Im übrigen umfaßt der Kraftabnehmer 8 nach Fig. 2 die im weiteren zylindrisch ausgebildete Außenfläche des Zylinderkörpers 1. Dank des Profilteiles 40 an dem Zylinderkörper 1 kann eine in den Kraftabnehmer 8 integrierte Bremseinrichtung 35 bis 38 vorgesehen werden, die den Zylinderkörper 1 nicht konzentrisch umfaßt.2 includes the further cylindrical outer surface of the cylinder body 1. Thanks to the profile part 40 on the cylinder body 1, an integrated braking device 35 to 38 can be provided in the power take-off 8, which does not concentrically surround the cylinder body 1.

Die Erfindung ist sowohl für Band- bzw. Seilzylinder als auch für sogenannte geschlitzte, kolbenstangenlose Arbeitszylinder geeignet. Die Rohrprofile der Zylinderköper sind aus Aluminium im Strangpreßverfahren herstellbar, die Ausführungsbeispiele zeigen hierzu grundsätzliche Profilbeispiele auf, wobei die aus diesen gefertigen, kolbenstangelosen Arbeitszylinder nur eine geringe Bauhöhe beanspruchen.The invention is suitable for band or rope cylinders as well as for so-called slotted rodless working cylinders. The tubular profiles of the cylinder bodies can be produced from aluminum using the extrusion process; the exemplary embodiments show basic profile examples, the working cylinders made from these, without piston rods, requiring only a small overall height.

Claims (9)

1. Working cylinder without a piston rod, having a power consumer (8) enclosing the cylinder housing (1), constructed as a slide and guided along the cylinder housing (1) without being able to rotate, in which consumer a brake device (35 to 38) with a brake lining (37) cooperating with an external friction surface of the cylinder housing (1) is integrated, characterised in that the cylinder housing (1) has a plurality of flat rolling or sliding ways (41, 42) extending in the longitudinal direction, against which rolling or sliding means (31 to 34; 43 and 44) arranged in the power consumer (8) rest so as to prevent rotation thereof, in that the brake lining (37) engages on one side with the cylinder housing (1), and in that at least some of the rolling or sliding means (31 and 32; 43 and 44) or slideways (41, 42) are arranged in such a way as to take up the radial forces occurring in the power consumer (8) during braking.
2. Working cylinder according to claim 1, characterised in that the rolling or sliding ways (41, 42) are located on profiled surfaces of the cylinder housing (1).
3. Working cylinder according to claim 1, characterised in that the power consumer (8) encloses the cylinder housing (1) and in that the power consumer (8) has four wheels or rollers (31-34) which rest against diametrically opposite rolling ways of the cylinder housing (1).
4. Working cylinder according to claim 3, characterised in that the cylinder housing (1) is constructed on the outside as a polygonal, possibly octagonal, cylindrical tube.
5. Working cylinder according to one of the preceding claims, characterised in that the power consumer (8) has at least one chamber-like recess (35) which can be connected to a pressure medium, in which recess there is arranged a movable brake body (36) with a brake lining (37) which can be pressed against the friction surface of the cylinder housing (1).
6. Working cylinder according to claim 5, characterised in that the brake body (36) has, facing the cylinder housing (1), inwardly inclined wedge surfaces for carrying a wedge-shaped brake lining (37).
7. Working cylinder according to claim 6, characterised in that the external surface (28) of the cylindrical tube (1) lying between two adjacent rolling or sliding ways carries the friction surface.
8. Working cylinder according to claim 7, characterised in that the external surface (28) carries a wedge-shaped profiled part (39) for the wedge-shaped brake linings (37) of the brake body (36) to press against.
9. Working cylinder according to claim 5, characterised in that on the cylinder housing (1) there are two radially projecting profiled parts (40), where in each case one of its surfaces is a friction surface for the brake device (35-36) and the opposite other surface (41, 42) is a rolling or sliding way (41,42).
EP85112239A 1982-08-05 1983-08-01 Rodless hydraulic ram Expired EP0177850B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19823229305 DE3229305A1 (en) 1982-08-05 1982-08-05 Brake device for fluid-driven rodless working cylinders
DE3229305 1982-08-05
DE3313206 1983-04-12
DE3313206 1983-04-12

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP83107549.4 Division 1983-08-01

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EP0177850A1 EP0177850A1 (en) 1986-04-16
EP0177850B1 true EP0177850B1 (en) 1987-11-25

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EP85112239A Expired EP0177850B1 (en) 1982-08-05 1983-08-01 Rodless hydraulic ram
EP83107549A Expired EP0104364B1 (en) 1982-08-05 1983-08-01 Rodless fluidic motor with brake means

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Application Number Title Priority Date Filing Date
EP83107549A Expired EP0104364B1 (en) 1982-08-05 1983-08-01 Rodless fluidic motor with brake means

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DE (2) DE3363754D1 (en)

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Also Published As

Publication number Publication date
DE3363754D1 (en) 1986-07-03
EP0177850A1 (en) 1986-04-16
EP0104364B1 (en) 1986-05-28
EP0104364A1 (en) 1984-04-04
DE3374707D1 (en) 1988-01-07

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