EP0177850A1 - Rodless hydraulic ram - Google Patents

Rodless hydraulic ram Download PDF

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Publication number
EP0177850A1
EP0177850A1 EP85112239A EP85112239A EP0177850A1 EP 0177850 A1 EP0177850 A1 EP 0177850A1 EP 85112239 A EP85112239 A EP 85112239A EP 85112239 A EP85112239 A EP 85112239A EP 0177850 A1 EP0177850 A1 EP 0177850A1
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EP
European Patent Office
Prior art keywords
working cylinder
power take
cylinder
cylinder according
cylinder housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85112239A
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German (de)
French (fr)
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EP0177850B1 (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 fluid-driven rodless cylinder according to the preamble of claim 1.
  • Fluid-driven rodless working cylinders which have power take-offs guided on the outside of the cylinder tube, which can be magnetically or mechanically connected to the piston.
  • the mechanical connection is made via a circumferential transmission element, in particular a belt, or via a rigid holder which projects through a sealable slot in the cylinder tube.
  • the invention relates preferably, but not exclusively, to band cylinders which carry rollers on their end faces, over which a band is preferably guided, which connects the piston to the power consumer.
  • a known braking device for a band cylinder comprises the cylinder tube concentrically with at least one brake pad and is integrated in the power take-off.
  • the power take-off also comprises the cylinder tube concentrically.
  • the known braking device can then be designed as a bellows, which is fixed to the cylindrical inner wall of the power take-off comprising play and which concentrically surrounds the cylinder tube. By The bellows is expanded when a fluid is supplied, the brake linings coming to rest on the cylindrical outer circumference of the cylinder tube for braking or stopping the force transducer moved by the piston.
  • the known rodless cylinder must be provided to prevent rotation of the cylinder tube concentrically encompassing the consumer with an outer casing, which is held on the cylinder tube ends and on the profiled inner surfaces of the force transducer in the longitudinal direction of the cylinder tube is rotatably displaceable.
  • the object of the invention is to provide an improved rodless cylinder of the type mentioned, which takes up only a small space with largely simplified manufacture and assembly and in particular still has a relatively small diameter when the braking device is integrated in the power consumer.
  • 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.
  • Embodiments are band or rope cylinders. It is clear that they can be provided with a cylinder wall opening to thereby form slotted working cylinders, in which the power consumer is connected to the piston via the slot and which work together with a cover band.
  • the cylinder tube of a band cylinder is denoted by 1, which in the example is designed as an octagonal tube with flat surfaces.
  • a slide-like power take-off 8 is slidably mounted along the octagonal cylinder tube 1, a slide-like power take-off 8 is slidably mounted.
  • the power take-off 8 is connected to the piston in a manner known per se via a circulating belt.
  • the band can be divided in a known manner into two sections, one section of which engages with one end at the front longitudinal end of the sled-like body 6 and is guided in a pressure-tight manner via a first roller at the front end of the cylinder tube through a sealed slot in the front cylinder head to attack with its front end on one side of the piston.
  • the other section of the rim engages with its one end at the opposite rear longitudinal end of the sled-like body 6 and is pressure-tightly guided via a second roller at the rear cylinder tube end through a further sealed slot in the rear cylinder head, and with its other end at the opposite other Side of the piston.
  • Such a division and guidance of the band between a power take-off and the piston of a band cylinder is e.g. made known by DE-OS 29 45 133.
  • 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 tube need not have the profile shape shown in Fig.l.
  • the person skilled in the art recognizes that the cylinder tube can be profiled in various ways, the profile surfaces for the braking device being able to be made in one piece with the cylinder tube or can belong to housing parts which are held on the cylinder tube.
  • the forces acting on the power take-off 8 are essentially absorbed by a profile part on the cylinder housing 1, the surface dimensions of which are independent of the diameter of the cylinder tube 1.
  • the power take-off 8 contains the braking device without this includes the cylinder barrel.
  • Profile surfaces that are fixed to the housing can be selected regardless of the diameter of the cylinder tube in terms of their area size and surface shape in such a way that optimum braking and positioning of the force transducer 8 is possible, the friction influences of the brake device in the released state also exerting a largely minor influence on the easy displacement of the force transducer.
  • the profile part can also belong to a profile body connected to the cylinder tube 1.
  • the wedge-shaped braking device can be advantageous since the available braking surface is enlarged and the wedge effect can be used for braking depending on the wedge angle selected. It is clear that springs are then expediently present which move the brake bodies back into their release position after braking.
  • Fig.l shows in more detail an embodiment of a brake cylinder, in which the power take-off 8 comprises a cylinder tube 1 designed as an octagonal tube.
  • the power consumer is supported by four wheels or rollers 31-34 on diametrically opposite surfaces of the octagonal cylinder tube 1.
  • a pressure body 36 is displaceable in the upper part of the power take-off 8 in which a pressure body 36 is displaceable.
  • the pressure body 36 has on its front side inwardly drawn wedge surfaces for supporting a wedge-shaped brake pad 37.
  • On the back of the pressure body 36 a pressure pad-like sealing element 38 is provided, the outer edge of which is supported lip-like on the inner wall of the recess 35.
  • the profile surface 28 of the cylinder tube 1 between two adjacent profile surfaces serving as guide surfaces for the force transducer carries an angled profile plate 39 which forms wedge-shaped contact surfaces for the wedge-shaped brake pads.
  • the flat profile surface 28 itself can 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 profiled tube 1, which then has two profile surfaces which, on the one hand, serve for the rotationally secure guidance of the power take-off 8, and on the other hand serve as a system for the braking device 36-38 integrated in the power take-off 8.
  • the power take-off comprises the cylinder tube in the example, due to the special profile shape of the cylinder tube, rotation-proof guidance of the power pick-up is possible, so that special devices for securing the power take-off against rotation are no longer required.
  • the power take-off according to Fig.l can also be formed symmetrically, so that the part of the power take-off with the braking device 35-38 diametrically opposite the part of the power take-off can then have a similar braking device, the two braking devices during braking work against each other.
  • the pressure medium source is connected to actuate one or more braking devices via at least one flexible hose, not shown, and connection bores, also not shown, to the pressure-tight space 35 or spaces 35.
  • the guide rollers or guide wheels 31-34 can also be replaced by sliding bands or sliding linings which are attached to the profile surfaces of the cylinder tube or correspondingly on the power consumer. It is also clear that the power take-off 8 does not necessarily have to be guided by means of four guide wheels or guide rollers or along four sliding belts. In a similar construction, three guide rollers or slideways, which are offset by 120 ° to each other, can be sufficient.
  • the embodiment of the invention according to Fig.2 is similar to that of Fig.l. The main difference is that the cylinder tube 1 has a wedge-shaped profile part 40 which is placed on the cylinder tube 1 or forms a unit with it.
  • the wedge-shaped profile part 40 has such a shape that the wedge-shaped inward-facing inner surfaces of the profile part 40 serve as contact surfaces of a wedge-shaped braking device 35-38 which, in contrast to the embodiment according to FIG. 1, does not wedge-shaped inwards with respect to the pressure body 36, but instead are directed towards the outside in a corresponding wedge shape.
  • the outer counter surfaces 41 and 42 on the profile part 40 serve as non-rotatable guide surfaces for the power take-off 8, which is displaceably guided by rollers or sliding surfaces on the counter surfaces 41 and 42.
  • Two corresponding rollers and / or wheels 43 and 44 are shown in dashed lines in FIG.
  • the power take-off 8 is guided according to Fig.2 by means of two rollers or wheels or by means of two slideways.
  • the power take-off 8 according to FIG. 2 comprises the cylindrical outer surface of the cylinder tube. Thanks to the profile part 40 on the cylinder tube, a braking device 35-38 integrated in the power consumer can be provided, which does not concentrically encompass the cylinder tube.
  • the invention can be suitable for a band or rope cylinder as well as for a so-called slotted cylinder.
  • the tube profiles can be manufactured from aluminum using the extrusion process.
  • the exemplary embodiments show the designer basic ways of specifying profiles for a rodless working cylinder which can be produced from aluminum using the extrusion process and which require a low overall height. It is clear that the invention is not restricted to rodless working cylinders which have a braking device integrated in a carriage-like body of the power consumer.
  • the explanations show basic solutions that can be designed with or without a braking device. Without a braking device, the sled-like body can be made shorter and possibly also flatter.

Abstract

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, characterized 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 ways as to take up the radial forces occuring in the power consumer (8) during braking.

Description

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

Es sind fluidgetriebene kolbenstangenlose Arbeitszylinder bekannt, die außen auf dem Zylinderrohr geführte Kraftabnehmer aufweisen, welche magnetisch oder mechanisch mit dem Kolben in Verbindung stehen können. Die mechanische Verbindung erfolgt über ein umlaufendes Übertragungsglied, insbesondere ein Band, oder über eine starre Halterung, die durch einen abdichtbaren Schlitz im Zylinderrohr ragt.Fluid-driven rodless working cylinders are known which have power take-offs guided on the outside of the cylinder tube, which can be magnetically or mechanically connected to the piston. The mechanical connection is made via a circumferential transmission element, in particular a belt, or via a rigid holder which projects through a sealable slot in the cylinder tube.

Die Erfindung bezieht sich vorzugsweise, jedoch nicht ausschließlich, auf Bandzylinder, die an ihren Stirnseiten Rollen tragen, über die vorzugsweise ein Band geführt ist, das den Kolben mit dem Kraftabnehmer verbindet.The invention relates preferably, but not exclusively, to band cylinders which carry rollers on their end faces, over which a band is preferably guided, which connects the piston to the power consumer.

Eine bekannte Bremseinrichtung für einen Bandzylinder umfaßt das Zylinderrohr konzentrisch mit wenigstens einem Bremsbelag und ist in die Kraftabnahme integriert.A known braking device for a band cylinder comprises the cylinder tube concentrically with at least one brake pad and is integrated in the power take-off.

Um eine solche Bremseinrichtung in die Kraftabnahme zu integrieren, umfaßt auch die Kraftabnahme das Zylinderrohr konzentrisch. Die bekannte Bremseinrichtung kann dann als Balg ausgebildet sein, der an der das Zylinderrohr mit Spiel umfassenden, zylindrischen Innenwand des Kraftabnehmers fest 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. Der bekannte kolbenstangenlose Zylinder muß zur Verdrehsicherung des das Zylinderrohr konzentrisch umfassenden Kraftabnehmers mit einer äußeren Verschalung versehen sein, die an den Zylinderrohrenden festgehalten ist und an deren profilierten Innenflächen der Kraftabnehmer in Längsrichtung des Zylinderrohres drehsicher verschieblich ist.In order to integrate such a braking device into the power take-off, the power take-off also comprises the cylinder tube concentrically. The known braking device can then be designed as a bellows, which is fixed to the cylindrical inner wall of the power take-off comprising play and which concentrically surrounds the cylinder tube. By The bellows is expanded when a fluid is supplied, the brake linings coming to rest on the cylindrical outer circumference of the cylinder tube for braking or stopping the force transducer moved by the piston. The known rodless cylinder must be provided to prevent rotation of the cylinder tube concentrically encompassing the consumer with an outer casing, which is held on the cylinder tube ends and on the profiled inner surfaces of the force transducer in the longitudinal direction of the cylinder tube is rotatably displaceable.

Bei den bekannten kolbenstangenlosen Zylindern werden daher die auf den Kraftabnehmer einwirkenden Kräfte nur zum Teil vom Gehäuse des Arbeitszylinders wirksam aufgenommen.In the known rodless cylinders, therefore, the forces acting on the power take-off are only partially absorbed by the housing of the working cylinder.

Aufgabe der Erfindung ist es, einen verbesserten kolbenstangenlosen Zylinder der eingangs genannten Art anzugeben, der bei weitgehend vereinfachter Fertigung und Montage nur einen geringen Raum beansprucht und insbesondere auch dann noch einen relativ kleinen Durchmesser aufweist, wenn die Bremseinrichtung in den Kraftabnehmer integriert ist.The object of the invention is to provide an improved rodless cylinder of the type mentioned, which takes up only a small space with largely simplified manufacture and assembly and in particular still has a relatively small diameter when the braking device is integrated in the power consumer.

Die Aufgabe wird erfindungsgemäß mit den kennzeichnenden Merkmalen des Anspruches 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.l einen Querschnitt durch ein erstes Ausführungsbeispiel und
  • Fig.2 einen Querschnitt durch ein zweites Ausführungsbeispiel ähnlich dem nach Fig.l.
The 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.l shows a cross section through a first embodiment and
  • 2 shows a cross section through a second embodiment similar to that of Fig.l.

Die Ausführungsbeispiele zeigen erfindungsgemäße Arbeitszylinder im Querschnitt durch den Kraftabnehmer. Gleiche Bezugszeichen in den Figuren bezeichnen gleiche oder entsprechende Teile. Bei denThe 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. Both

Ausführungsbeispielen handelt es sich um Band- bzw. Seilzylinder. Es ist klar, daß sie mit einer Zylinderwanddurchbrechung versehen sein können, um dadurch geschlitzte Arbeitszylinder zu bilden, bei denen der Kraftabnehmer über den Schlitz mit dem Kolben verbunden ist und die mit einem Abdeckband zusammenarbeiten. In Fig.l ist das Zylinderrohr eines Bandzylinders mit 1 bezeichnet, das im Beispielsfalle als Achtkantrohr mit planen Flächen ausgebildet ist.Embodiments are band or rope cylinders. It is clear that they can be provided with a cylinder wall opening to thereby form slotted working cylinders, in which the power consumer is connected to the piston via the slot and which work together with a cover band. In Fig.l, the cylinder tube of a band cylinder is denoted by 1, which in the example is designed as an octagonal tube with flat surfaces.

Entlang dem achtkantigen Zylinderrohr 1 ist ein schlittenartiger Kraftabnehmer 8 verschieblich angebracht. Der Kraftabnehmer 8 steht in an sich bekannter Weise über ein umlaufendes Band mit dem Kolben in Verbindung. Weder das Band noch der Kolben sind in Fig.l dargestellt. Das Band kann in bekannter Weise in zwei Abschnitte geteilt sein, von denen der eine Abschnitt mit seinem einen Ende am vorderen längsseitigen Ende des schlittenartigen Körpers 6 angreift und über eine erste Rolle am vorderen Zylinderrohrende durch einen abgedichteten Schlitz im vorderen Zylinderkopf druckdicht geführt ist, um mit seinem vorderen Ende an der einen Seite des Kolbens anzugreifen. Entsprechend greift der andere Abschnitt des Randes mit seinem einen Ende am entgegengesetzten hinteren längsseitigen Ende des schlittenartigen Körpers 6 an und ist über eine zweite Rolle am hinteren Zylinderrohrende durch einen weiteren abgedichteten Schlitz im hinteren Zylinderkopf druckdicht geführt, um mit seinem anderen Ende an der gegenüberliegenden anderen Seite des Kolbens anzugreifen.Along the octagonal cylinder tube 1, a slide-like power take-off 8 is slidably mounted. The power take-off 8 is connected to the piston in a manner known per se via a circulating belt. Neither the band nor the piston are shown in Fig.l. The band can be divided in a known manner into two sections, one section of which engages with one end at the front longitudinal end of the sled-like body 6 and is guided in a pressure-tight manner via a first roller at the front end of the cylinder tube through a sealed slot in the front cylinder head to attack with its front end on one side of the piston. Correspondingly, the other section of the rim engages with its one end at the opposite rear longitudinal end of the sled-like body 6 and is pressure-tightly guided via a second roller at the rear cylinder tube end through a further sealed slot in the rear cylinder head, and with its other end at the opposite other Side of the piston.

Eine derartige Aufteilung und Führung des Bandes zwischen einem Kraftabnehmer und dem Kolben eines Bandzylinders ist z.B. durch die DE-OS 29 45 133 bekanntgeworden.Such a division and guidance of the band between a power take-off and the piston of a band cylinder is e.g. made known by DE-OS 29 45 133.

Es gehört weiterhin zum Stand der Technik der Bandzylinder, die Enden der beiden Abschnitte des zweigeteilten Bandes am Schlitten und am Kolben nicht fest einzuspannen, sondern gelenkig angreifen zu lassen. Die erforderliche Bandspannung kann allein vom Band oder teilweise vom Band und durch zusätzliche Federn aufgebracht werden, die auf die verstärkten Bandenden am Kraftabnehmer und/oder am Kolben einwirken. Es ist auch schon bekannt, im Kraftabnehmer eine spannschloßartige Vorrichtung anzuordnen, an die die Bandenden gelenkig anschließen und mit der der Verspannungsgrad des Bandes im Verhältnis zur Federspannung einstellbar ist.It also belongs to the state of the art of the band cylinder not to clamp the ends of the two sections of the two-part band on the slide and on the piston, but rather to allow them to engage in an articulated manner. The required belt tension can be applied solely from the belt or partly from the belt and by means of additional springs which act on the reinforced belt ends on the power consumer and / or on the piston. It is also known to arrange a turnbuckle-like device in the power take-off, to which the band ends are connected in an articulated manner and with which the degree of tensioning of the band in relation to the spring tension can be adjusted.

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.

Es ist klar, daß das Zylinderrohr nicht die in Fig.l gezeigte Profilgestalt aufweisen muß. Aufgrund der erfindungsgemäßen Lehre erkennt der Fachmann, daß das Zylinderrohr in verschiedener Weise profiliert sein kann, wobei die Profilflächen zur Anlage der Bremseinrichtung einstückig mit dem Zylinderrohr sein können oder zu Gehäuseteilen gehören können, die am Zylinderrohr festgehalten sind. Anhand der Ausführungsbeispiele wird außerdem deutlich, daß die auf den Kraftabnehmer 8 einwirkenden Kräfte im wesentlichen von einem Profilteil am Zylindergehäuse 1 aufgenommen werden, das in seinen Flächenabmessungen unabhängig ist von dem Durchmesser des Zylinderrohres 1. Der Kraftabnehmer 8 beinhaltet dabei die Bremseinrichtung, ohne daß diese das Zylinderrohr umfaßt. Gehäusefeste Profilflächen sind dabei unabhängig vom Durchmesser des Zylinderrohres 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 einen weitgehend geringen Einfluß ausüben.It is clear that the cylinder tube need not have the profile shape shown in Fig.l. On the basis of the teaching according to the invention, the person skilled in the art recognizes that the cylinder tube can be profiled in various ways, the profile surfaces for the braking device being able to be made in one piece with the cylinder tube or can belong to housing parts which are held on the cylinder tube. Based on the exemplary embodiments it is also clear that the forces acting on the power take-off 8 are essentially absorbed by a profile part on the cylinder housing 1, the surface dimensions of which are independent of the diameter of the cylinder tube 1. The power take-off 8 contains the braking device without this includes the cylinder barrel. Profile surfaces that are fixed to the housing can be selected regardless of the diameter of the cylinder tube in terms of their area size and surface shape in such a way that optimum braking and positioning of the force transducer 8 is possible, the friction influences of the brake device in the released state also exerting a largely minor influence on the easy displacement of the force transducer.

Es ist natürlich klar, daß das Profilteil auch zu einem mit dem Zylinderrohr 1 verbundenen Profilkörper gehören können. Die keilförmig ausgebildete Bremseinrichtung kann vorteilhaft sein, da die zur Verfügung stehende Bremsfläche vergrößert ist und die Keilwirkung in Abhängigkeit von dem gewählten Keilwinkel zur Bremsung ausgenutzt werden kann. Es ist klar, daß dann zweckmäßigerweise Federn vorhanden sind, die die Bremskörper nach einer Bremsung in ihre Lösestellung zurückbewegen.It is of course clear that the profile part can also belong to a profile body connected to the cylinder tube 1. The wedge-shaped braking device can be advantageous since the available braking surface is enlarged and the wedge effect can be used for braking depending on the wedge angle selected. It is clear that springs are then expediently present which move the brake bodies back into their release position after braking.

Mehr im einzelnen zeigt Fig.l eine Ausführung eines Bremszylinders, in der der Kraftabnehmer 8 ein als Achteckrohr ausgebildetes Zylinderrohr 1 umfaßt. Der Kraftabnehmer stützt sich mit vier Rädern bzw. Rollen 31-34 an diametral gegenüberliegenden Flächen des achteckigen Zylinderrohres 1 ab. Im oberen Teil des Kraftabnehmers 8 ist ein druckdichter Raum 35 vorhanden, in dem ein Druckkörper 36 verschieblich ist. Der Druckörper 36 besitzt an seiner vorderen Seite nach innen gezogene Keilflächen zum Tragen eines keilförmigen Bremsbelages 37. An der Rückseite des Druckkörpers 36 ist ein druckkissenartiges Abdichtungselement 38 vorgesehen, dessen äußerer Rand sich lippenartig an der Innenwand der Ausnehmung 35 abstützt.Fig.l shows in more detail an embodiment of a brake cylinder, in which the power take-off 8 comprises a cylinder tube 1 designed as an octagonal tube. The power consumer is supported by four wheels or rollers 31-34 on diametrically opposite surfaces of the octagonal cylinder tube 1. 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. The pressure body 36 has on its front side inwardly drawn wedge surfaces for supporting a wedge-shaped brake pad 37. On the back of the pressure body 36 a pressure pad-like sealing element 38 is provided, the outer edge of which is supported lip-like on the inner wall of the recess 35.

Die Profilfläche 28 des Zylinderrohrs 1 zwischen zwei benachbarten, als Führungsflächen für den Kraftabnehmer dienenden Profilflächen trägt ein winkliges Profilblech 39, das keilförmige Anlageflächen für die keilförmigen Bremsbeläge bildet. Es ist klar, daß auch die flache Profilfläche 28 selbst als Anlagefläche für die Bremseinrichtung dienen kann, wenn auf eine keilförmige Bremseinrichtung verzichtet wird. Außerdem ist klar, daß das Profilblech 39 integraler Bestandteil des Profilrohres 1 sein kann, das dann zwei Profilflächen aufweist, die einerseits zur drehsicheren Führung des Kraftabnehmers 8 dienen, zum anderen als Anlage für die in den Kraftabnehmer 8 integrierte Bremseinrichtung 36-38 dienen. Obwohl der Kraftabnehmer im Beispielsfalle das Zylinderrohr umfaßt, ist aufgrund der besonderen Profilgestalt des Zylinderrohres eine verdrehsichere Führung des Kraftabnehmers möglich, so daß besondere Vorrichtungen zur Verdrehsicherung des Kraftabnehmers nicht mehr erforderlich sind.The profile surface 28 of the cylinder tube 1 between two adjacent profile surfaces serving as guide surfaces for the force transducer carries an angled profile plate 39 which forms wedge-shaped contact surfaces for the wedge-shaped brake pads. It is clear that the flat profile surface 28 itself can serve as a contact surface for the braking device if a wedge-shaped braking device is dispensed with. In addition, it is clear that the profiled sheet 39 can be an integral part of the profiled tube 1, which then has two profile surfaces which, on the one hand, serve for the rotationally secure guidance of the power take-off 8, and on the other hand serve as a system for the braking device 36-38 integrated in the power take-off 8. Although the power take-off comprises the cylinder tube in the example, due to the special profile shape of the cylinder tube, rotation-proof guidance of the power pick-up is possible, so that special devices for securing the power take-off against rotation are no longer required.

Es ist weiterhin klar, daß der Kraftabnehmer nach Fig.l sich auch symmetrisch ausbilden läßt, so daß dann der dem Teil des Kraftabnehmers mit der Bremseinrichtung 35-38 diametral gegenüberliegende Teil des Kraftabnehmers eine gleichartige Bremseinrichtung aufweisen kann, wobei die beiden Bremseinrichtungen bei der Bremsung gegeneinander wirken.It is also clear that the power take-off according to Fig.l can also be formed symmetrically, so that the part of the power take-off with the braking device 35-38 diametrically opposite the part of the power take-off can then have a similar braking device, the two braking devices during braking work against each other.

Die nicht dargestellte Druckmittelquelle ist zum Betätigen einer oder mehrerer Bremseinrichtungen über wenigstens einen nicht dargestellten, flexiblen Schlauch und ebenfalls nicht dargestellte Anschlußbohrungen an den druckdichten Raum 35 bzw. Räume 35 angeschlossen.The pressure medium source, not shown, is connected to actuate one or more braking devices via at least one flexible hose, not shown, and connection bores, also not shown, to the pressure-tight space 35 or spaces 35.

Es ist dem Fachmann klar, daß die Führungsrollen oder Führungsräder 31-34 auch durch Gleitbänder oder Gleitbeläge ersetzt sein können, die an den Profilflächen des Zylinderrohres oder auch entsprechend am Kraftabnehmer angebracht sind. Außerdem ist klar, daß der Kraftabnehmer 8 nicht notwendigerweise mittels vier Führungsräder oder Führungsrollen bzw. entlang von vier Gleitbändern geführt werden muß. So können in einer ähnlichen Konstruktion auch schon drei Führungsrollen bzw. Gleitbahnen ausreichend sein, die zueinander um 120° versetzt angeordnet sind. Die Ausführung der Erfindung nach Fig.2 ist ähnlich der nach Fig.l. Der wesentliche Unterschied besteht darin, daß das Zylinderrohr 1 ein keilförmiges Profilteil 40 aufweist, das auf das Zylinderrohr 1 aufgesetzt ist oder mit diesem eine Einheit bildet. Das keilförmige Profilteil 40 weist eine derartige Gestalt auf, daß die keilförmig nach innen weisenden Innenflächen des Profilteiles 40 als Anlageflächen einer keilförmigen Bremseinrichtung 35-38 dienen, die im Gegensatz zu der Ausführung nach Fig.l bezüglich des Druckkörpers 36 nicht keilförmig nach innen, sondern etwa entsprechend keilförmig nach außen gerichtet sind. Die äußeren Gegenflächen 41 und 42 an dem Profilteil 40 dienen als verdrehsichere Führungsflächen für den Kraftabnehmer 8, der mit Rollen oder Gleitflächen an den Gegenflächen 41 und 42 verschieblich geführt ist. Zwei entsprechende Rollen und/oder Räder 43 und 44 sind in Fig.2 gestrichelt dargstellt. Im Gegensatz zu der Ausführung nach Fig.l ist der Kraftabnehmer 8 nach Fig.2 mittels zweier Rollen oder Räder bzw. mittels zweier Gleitbahnen geführt.It is clear to the person skilled in the art that the guide rollers or guide wheels 31-34 can also be replaced by sliding bands or sliding linings which are attached to the profile surfaces of the cylinder tube or correspondingly on the power consumer. It is also clear that the power take-off 8 does not necessarily have to be guided by means of four guide wheels or guide rollers or along four sliding belts. In a similar construction, three guide rollers or slideways, which are offset by 120 ° to each other, can be sufficient. The embodiment of the invention according to Fig.2 is similar to that of Fig.l. The main difference is that the cylinder tube 1 has a wedge-shaped profile part 40 which is placed on the cylinder tube 1 or forms a unit with it. The wedge-shaped profile part 40 has such a shape that the wedge-shaped inward-facing inner surfaces of the profile part 40 serve as contact surfaces of a wedge-shaped braking device 35-38 which, in contrast to the embodiment according to FIG. 1, does not wedge-shaped inwards with respect to the pressure body 36, but instead are directed towards the outside in a corresponding wedge shape. The outer counter surfaces 41 and 42 on the profile part 40 serve as non-rotatable guide surfaces for the power take-off 8, which is displaceably guided by rollers or sliding surfaces on the counter surfaces 41 and 42. Two corresponding rollers and / or wheels 43 and 44 are shown in dashed lines in FIG. In contrast to the embodiment according to Fig.l, the power take-off 8 is guided according to Fig.2 by means of two rollers or wheels or by means of two slideways.

Im übrigen umfaßt der Kraftabnehmer 8 nach Fig.2 die zylindrische Außenfläche des Zylinderrohres. Dank des Profilteiles 40 an dem Zylinderrohr kann eine in den Kraftabnehmer integrierte Bremseinrichtung 35-38 vorgesehen werden, die das Zylinderrohr nicht konzentrisch umfaßt.Otherwise, the power take-off 8 according to FIG. 2 comprises the cylindrical outer surface of the cylinder tube. Thanks to the profile part 40 on the cylinder tube, a braking device 35-38 integrated in the power consumer can be provided, which does not concentrically encompass the cylinder tube.

Die Erfindung kann sowohl für einen Band- oder Seilzylinder als auch für einen sogenannten geschlitzten Zylinder geeignet sein. Die Rohrprofile sind aus Aluminium im Strangpreßverfahren herstellbar.The invention can be suitable for a band or rope cylinder as well as for a so-called slotted cylinder. The tube profiles can be manufactured from aluminum using the extrusion process.

Durch die Ausführungsbeispiele sind dem Konstrukteur grundsätzliche Wege aufgezeigt, Profile für einen kolbenstangenlosen Arbeitszylinder anzugeben, die sich im Strangpreßverfahren aus Aluminium herstellen lassen und eine geringe Bauhöhe beanspruchen. Es ist klar, daß die Erfindung nicht auf kolbenstangenlose Arbeitszylinder beschränkt ist, die in einem schlittenartigen Körper des Kraftabnehmers eine Bremseinrichtung integriert haben. Die Ausführungen zeigen grundsätzliche Lösungswege, die mit oder ohne Bremseinrichtung ausgebildet sein können. Ohne Bremseinrichtung kann der schlittenartige Körper kürzer und gegebenenfalls auch flacher ausgebildet sein.The exemplary embodiments show the designer basic ways of specifying profiles for a rodless working cylinder which can be produced from aluminum using the extrusion process and which require a low overall height. It is clear that the invention is not restricted to rodless working cylinders which have a braking device integrated in a carriage-like body of the power consumer. The explanations show basic solutions that can be designed with or without a braking device. Without a braking device, the sled-like body can be made shorter and possibly also flatter.

Claims (18)

1. Fluidgetriebener kolbenstangenloser Arbeitszylinder mit längs des Zylindergehäuses (1) verdrehsicher geführtem Kraftabnehmer, dadurch gekennzeichnet, daß der Kraftabnehmer (8) schlittenartig ausgebildet ist und sich außen am Zylindergehäuse mittels Gleit- oder Rollkörpern abstützt.1. Fluid-driven rodless working cylinder with along the cylinder housing (1) rotatably guided power take-off, characterized in that the power take-off (8) is sledge-like and is supported on the outside of the cylinder housing by means of sliding or rolling elements. 2. Arbeitszylinder nach Anspruch 1, dadurch gekennzeichnet, daß im Kraftabnehmer (8) Räder oder Rollen (31-34) gelagert sind, die sich außen an gegenüberliegenden Flächenabschnitten des Zylindergehäuses (1) abstützen.2. Working cylinder according to claim 1, characterized in that in the power take-off (8) wheels or rollers (31-34) are mounted, which are supported on the outside on opposite surface sections of the cylinder housing (1). 3. Arbeitszylinder nach Anspruch 2, dadurch gekennzeichnet, daß die Räder oder Rollen (31-34) durch Gleitbänder oder Gleitbeläge ersetzt sind.3. Working cylinder according to claim 2, characterized in that the wheels or rollers (31-34) are replaced by sliding bands or sliding linings. 4. Arbeitszylinder nach Anspruch 3, dadurch gekennzeichnet, daß die Gleitbänder oder Gleitbeläge an Profilflächen des Zylindergehäuses (1) und/oder am Kraftabnehmer (8) angebracht sind.4. Working cylinder according to claim 3, characterized in that the sliding bands or sliding linings on profile surfaces of the cylinder housing (1) and / or on the power take-off (8) are attached. 5. Arbeiszylinder nach Anspruch 1 dadurch gekennzeichnet, daß der Kraftabnehmer (8) das Zylindergehäuse (1) umfaßt.5. working cylinder according to claim 1, characterized in that the power take-off (8) comprises the cylinder housing (1). 6. Arbeitszylinder nach Anspruch 2 dadurch gekennzeichnet, daß der Kraftabnehmer (8) vier Räder oder Rollen (31-34) aufweist, die sich an diametral gegenüberliegenden Außenflächen des Zylindergehäuses (1) abstützen.6. Working cylinder according to claim 2, characterized in that the power take-off (8) has four wheels or rollers (31-34) on Support diametrically opposite outer surfaces of the cylinder housing (1). 7. Arbeitszylinder nach Anspruch 6, dadurch gekennzeichnet, daß das Zylindergehäuse (1) außenseitig als vieleckiges (achteckiges) Zylinderrohr ausgebildet ist.7. Working cylinder according to claim 6, characterized in that the cylinder housing (1) is formed on the outside as a polygonal (octagonal) cylinder tube. 8. Arbeitszylinder nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Zylindergehäuse (1) Führungsflächen für den Kraftabnehmer (8) aufweist.8. Working cylinder according to one of the preceding claims, characterized in that the cylinder housing (1) has guide surfaces for the power take-off (8). 9. Arbeitszylinder nach Anspruch 9, dadurch gekennzeichnet, daß sich Gleit- oder Rollkörper (43,44) an den Führungsflächen abstützen.9. Working cylinder according to claim 9, characterized in that sliding or rolling bodies (43, 44) are supported on the guide surfaces. 10. Arbeitszylinder nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Kraftabnehmer (8) wenigstens eine an ein Druckmedium anschließbare kammerartige Ausnehmung (35) aufweist, in der ein Bremskörper (36) verschieblich angeordnet ist, der mit dem Zylindergehäuse (1) reibschlüssig zusammenwirkt.10. Working cylinder according to one of the preceding claims, characterized in that the power take-off (8) has at least one chamber-like recess (35) which can be connected to a pressure medium and in which a brake body (36) is arranged displaceably and frictionally with the cylinder housing (1) cooperates. 11. Arbeitszylinder nach Anspruch 11, dadurch gekennzeichnet, daß der Bremskörper (36) an seiner Vorderseite nach innen gezogene Keilflächen zum Tragen eines keilförmigen Bremsbelages (37) aufweist.11. Working cylinder according to claim 11, characterized in that the brake body (36) on its front side has inwardly drawn wedge surfaces for carrying a wedge-shaped brake pad (37). 12. Arbeitszylinder nach Anspruch 11, dadurch gekennzeichnet, daß an der Rückseite des Bremskörpers (36) zum druckmitteldichten Abschluß der Ausnehmung (35) zum Bremskörper (36) ein druckkissenartiges Abdichtungselement (38) vorgesehen ist, dessen äußerer Rand sich lippenartig an der Innenwand der Ausnehmung abstützt.12. Working cylinder according to claim 11, characterized in that a pressure pad-like sealing element (38) is provided on the back of the brake body (36) for the fluid-tight closure of the recess (35) to the brake body (36), the outer edge of which is lip-like on the inner wall of the Support recess. 13. Arbeitszylinder nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, daß die zwischen zwei benachbarten Führungsflächen für das Kraftabnehmer (8) liegende äußere Zylinderrohrfläche (28) des Zylinderrohres (1) Anlagefläche für den Bremskörper ist.13. Working cylinder according to one of claims 8 to 11, characterized in that the lying between two adjacent guide surfaces for the power take-off (8) outer cylinder tube surface (28) of the cylinder tube (1) is contact surface for the brake body. 14. Arbeitszylinder nach Anspruch 11 und 13, dadurch gekennzeichnet, daß die Zylinderrohrfläche (28) ein keilförmiges Profilteil (39) zur Anlage für die keilförmigen Bremsbeläge (37) des Bremskörpers (36) trägt.14. Working cylinder according to claim 11 and 13, characterized in that the cylinder tube surface (28) carries a wedge-shaped profile part (39) for abutment for the wedge-shaped brake pads (37) of the brake body (36). 15. Arbeitszylinder nach Anspruch 14, dadurch gekennzeichnet, daß das Profilteil (39) integraler Bestandteil des Zylinderrohres ist.15. Working cylinder according to claim 14, characterized in that the profile part (39) is an integral part of the cylinder tube. 16. Arbeitszylinder nach Anspruch 10, dadurch gekennzeichnet, daß außenseitig am Zylinderrohr wenigstens zwei Profilflächen vorhanden sind, von denen die eine zur drehsicheren Führung des Kraftabnehmers (8) dient und die andere als Anlage für die im Kraftabnehmer (8) integrierte Bremseinrichtung (36-38) vorgesehen ist.16. Working cylinder according to claim 10, characterized in that there are at least two profile surfaces on the outside of the cylinder tube, one of which serves for the rotationally secure guidance of the power consumer (8) and the other as a system for the brake device (8) integrated in the power consumer (8). 38) is provided. 17. Arbeitszylinder nach Anspruch 16, dadurch gekennzeichnet, daß am Zylindergehäuse (1) ein Profilteil (40) vorhanden ist, dessen eine Fläche reibschlüssige Anlagefläche für die Bremseinrichtung (35-36) ist und dessen gegenüberliegende andere Fläche (41,42) verdrehsichere Führungsfläche für den Kraftabnehmer (8) ist.17. Working cylinder according to claim 16, characterized in that a profile part (40) is present on the cylinder housing (1), one surface of which is a frictional contact surface for the braking device (35-36) and the opposite other surface (41, 42) of a non-rotatable guide surface for the power consumer (8). 18. Arbeitszylinder nach Anspruch 10, dadurch gekennzeichnet, daß der das Zylindergehäuse (1) umfassende Kraftabnehmer (8) zwei Bremseinrichtungen aufweist, die mit zwei diametral gegenüberliegenden Flächenabschnitten des Zylindergehäuses (1) reibschlüssig zusammenwirken.18. Working cylinder according to claim 10, characterized in that the cylinder housing (1) comprehensive power take-off (8) has two braking devices which cooperate with two diametrically opposite surface sections of the cylinder housing (1) frictionally.
EP85112239A 1982-08-05 1983-08-01 Rodless hydraulic ram Expired EP0177850B1 (en)

Applications Claiming Priority (4)

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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

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JPS61241506A (en) * 1985-02-08 1986-10-27 ヒグラマ・アクチエンゲゼルシヤフト Pressure medium cylinder
DE3822103A1 (en) * 1988-06-30 1990-02-08 Winkler Duennebier Kg Masch DEVICE FOR MOVING PARTS
JPH02278003A (en) * 1989-02-28 1990-11-14 Hygrama Ag Pressure cylinder
EP0447379A1 (en) * 1990-02-09 1991-09-18 Bo Granbom A braking arrangement in operating devices for linear motion
EP0536799A1 (en) * 1991-10-11 1993-04-14 Smc Kabushiki Kaisha Rodless cylinder
EP0540015A2 (en) * 1991-11-01 1993-05-05 Smc Kabushiki Kaisha Rodless cylinder
EP0542211A1 (en) * 1991-11-11 1993-05-19 Smc Kabushiki Kaisha Rodless cylinder
EP0582782A1 (en) * 1992-07-21 1994-02-16 Smc Kabushiki Kaisha Rodless cylinder
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DE8424035U1 (en) * 1984-08-13 1984-11-22 Herion-Werke Kg, 7012 Fellbach PISTONLESS CYLINDER
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JPH0765602B2 (en) * 1987-01-30 1995-07-19 豊和工業株式会社 Rotless dress cylinder
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JPS61241506A (en) * 1985-02-08 1986-10-27 ヒグラマ・アクチエンゲゼルシヤフト Pressure medium cylinder
DE3822103A1 (en) * 1988-06-30 1990-02-08 Winkler Duennebier Kg Masch DEVICE FOR MOVING PARTS
JPH02278003A (en) * 1989-02-28 1990-11-14 Hygrama Ag Pressure cylinder
EP0447379A1 (en) * 1990-02-09 1991-09-18 Bo Granbom A braking arrangement in operating devices for linear motion
EP0536799A1 (en) * 1991-10-11 1993-04-14 Smc Kabushiki Kaisha Rodless cylinder
US5275088A (en) * 1991-10-11 1994-01-04 Smc Kabushiki Kaisha Rodless cylinder
US5311810A (en) * 1991-11-01 1994-05-17 Smc Kabushiki Kaisha Rodless cylinder
EP0540015A2 (en) * 1991-11-01 1993-05-05 Smc Kabushiki Kaisha Rodless cylinder
EP0540015A3 (en) * 1991-11-01 1993-12-22 Smc Kk Rodless cylinder
EP0542211A1 (en) * 1991-11-11 1993-05-19 Smc Kabushiki Kaisha Rodless cylinder
US5279207A (en) * 1991-11-11 1994-01-18 Smc Kabushiki Kaisha Rodless cylinder
EP0582782A1 (en) * 1992-07-21 1994-02-16 Smc Kabushiki Kaisha Rodless cylinder
US5333535A (en) * 1992-07-21 1994-08-02 Smc Kabushiki Kaisha Rodless cylinder
US6336393B1 (en) 1998-07-01 2002-01-08 Parker-Hannifin Corporation Rodless pneumatic cylinder

Also Published As

Publication number Publication date
DE3374707D1 (en) 1988-01-07
DE3363754D1 (en) 1986-07-03
EP0104364B1 (en) 1986-05-28
EP0104364A1 (en) 1984-04-04
EP0177850B1 (en) 1987-11-25

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