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EP0029188A2 - Brake mechanism for ram cylinders without piston rod - Google Patents

Brake mechanism for ram cylinders without piston rod Download PDF

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Publication number
EP0029188A2
EP0029188A2 EP80106882A EP80106882A EP0029188A2 EP 0029188 A2 EP0029188 A2 EP 0029188A2 EP 80106882 A EP80106882 A EP 80106882A EP 80106882 A EP80106882 A EP 80106882A EP 0029188 A2 EP0029188 A2 EP 0029188A2
Authority
EP
European Patent Office
Prior art keywords
braking device
cylinder
fluid
pistons
piston
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
EP80106882A
Other languages
German (de)
French (fr)
Other versions
EP0029188A3 (en
EP0029188B1 (en
Inventor
Oskar Dr.-Ing. Dipl.-Ing. Peter
Anton Stahr
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to AT80106882T priority Critical patent/ATE4741T1/en
Publication of EP0029188A2 publication Critical patent/EP0029188A2/en
Publication of EP0029188A3 publication Critical patent/EP0029188A3/en
Application granted granted Critical
Publication of EP0029188B1 publication Critical patent/EP0029188B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/082—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents
    • Y10T74/2066—Friction

Definitions

  • the invention relates to a brake device for rodless working cylinders, preferably for stopping, holding and positioning fluid-driven piston rodless working cylinders, which are operated, for example, by means of a rotating transmission element, e.g. a steel belt, a power bridge, a magnetic field or the like. Transfer the driving force of the piston to a decrease in force, this braking device being actuated by a fluid, a spring or the like.
  • a rotating transmission element e.g. a steel belt, a power bridge, a magnetic field or the like.
  • Actuators in general such as fluid-driven piston rodless drives, for example, must be able to be stopped, held and also positioned precisely if they are to be able to fully perform a variety of tasks.
  • the braking of such a drive for example a pneumatic cylinder, a so-called band cylinder or the like. is practically difficult to solve. This is due to the nature of these drives, especially if the drive means is a compressive fluid, for example a gas, and in addition changing loads on the drive have an additional effect.
  • the parking brake consists essentially of an aluminum housing attached to the cylinder head, an eccentric with clutch lever and a single or double-acting pneumatic cylinder.
  • the piston rod of the drive is guided within the eccentric and slidably supported within the aluminum housing.
  • Systems which act as safety devices and are dependent on the internal pressure in the cylinder are also known, in this case a spring element responds to a specific differential pressure and the piston only runs to a standstill.
  • rodless working cylinders e.g. Band cylinder, rope cylinder or the like
  • a locking device acting on the piston rod of the drive cannot be used due to the lack thereof. It can also not be modified so that it can be movably attached to the cylinder tube of a band cylinder or the like.
  • the locking device is fastened to the cylinder tube of a band cylinder, namely immovably, then it would have to have the movable transmission member, e.g. brake the steel belt, i.e. a link that is intrinsically difficult to handle and is loaded to the limit of its permanent load.
  • a braking device for a band cylinder should follow the movements of the band or another transmission element and be able to support itself on the cylinder tube.
  • the invention is therefore based on the object of possessing a braking device for stopping, holding and positioning for fluid-driven cylinder drives, for example belt cylinders or the like, which requires particularly little space and certainly avoids the disadvantages of the known devices of this type.
  • the braking device concentrically surrounds the cylinder tube with at least one brake pad and is integrated in the power take-off.
  • the braking device consists of a bellows which is placed around the cylinder tube and can be filled with a fluid as a drive for the brake linings.
  • Another advantageous embodiment provides that one or more pistons which can be acted upon by a fluid are arranged, which act on the brake linings via a cone and are held in their rest positions by spring force.
  • the brake device proposed according to the invention and integrated into the power take-off of a rodless working cylinder and comprising the cylinder tube with at least one brake pad is to be seen in particular in that overstressing of the transmission member, i.e. the belt, rope or the like, is avoided with certainty will, with full usability of the available braking energy and further to the fact that the braking device can be used universally, which is to be understood as the possibility of being able to place the braking device on a wide variety of fluid-driven drive systems. It is thus even possible to master the so-called load limit case, that is, if the deceleration is greater than the force for which the drive element, in particular the transmission element, is designed.
  • the braking force available can be greater than the driving force, so the braking device then acts completely independently of the pressure prevailing in the cylinder. It is also advantageous that the braking device acts on the outer circumference of the cylinder tube and not by means of spring-loaded rollers on the inner running surface of the cylinder, which must not be exposed to any foreign bodies.
  • Rodless working cylinders for which the object proposed by the invention is particularly suitable, are understood to mean drives in which the force of the cylinder, ie the drive element, either via a power bridge through a slot in the cylinder tube or via magnets or via circumferential belts, ropes, Steel wire-plastic straps or combinations thereof is transferred from the piston to the outside.
  • a rodless cylinder is shown in the form of a band cylinder.
  • the cylinder tube itself is labeled “1”
  • the piston "2” which is shown in a broken window of the cylinder tube "1”.
  • the transmission link is shown as a steel belt.
  • This steel belt “3” is attached to the piston “2” on the right and left and runs over rollers "4" and “5" in the cylinder heads "6" and “7”.
  • the power take-off "8” is fixed with the tape “3” connected.
  • the braking device “9” is firmly integrated into this power take-off "8".
  • With “10” is a nozzle for the supply of fluid for the ' braking device.
  • FIG. 3 shows an embodiment variant of the braking device.
  • a bellows "11” there are two annular pistons “13a” and “13b”.
  • the two ring pistons “13a” and “13b” are clamped against each other by means of a spring “14” and pressed into their end positions.
  • the pistons “13a” and “13b” act on the actual brake element, which consists of one or more brake pads “12, via transmission members” 15a “and” 15b ", which have a conical running surface, via correspondingly shaped counter-members” 16a “and” 16b “ “consists of.
  • "17” and "18” denote sliding bands with which the braking device "9” can slide on the cylinder tube "1".
  • the fluid is fed in the braking direction via feeds "19” and "20".
  • FIG. 4 shows a section through the braking device according to FIG. 3. From both figures it can be seen that the braking device of this embodiment variant serves to hold the power take-off "8" at a specific location and to cancel this positioning when the fluid is fed through the feeders "19" and "20". Thus, the power take-off "8" can be moved again by the piston "2" until the pressure of the fluid in the braking device is released.
  • Figure 5 shows a longitudinal section through an embodiment with one or more pistons "26a” and “26b” instead of the annular pistons "13a” and “13b". If several are provided, these pistons "26” are arranged in a circle around the cylinder tube.
  • FIG. 6 acts in the opposite way to that described in FIGS. 3 and 4, that is to say corresponding to FIG. 2.
  • the annular piston “13a” and “13b” is also tensioned in the outer position by the spring “14” held, however, that is conical Transfer member of the image 3/4 shown "15a” and “15b” as the transmission member "21” or “22” responsive to a G egenglied “23” act, but in a reverse manner, namely so that, when acting upon the piston “ 13a “or” 13b “are pressed by a fluid, the transmission members” 21 “and” 22 "against the conical surface of the counter member” 23 “and thus the brake pads” 12 "are pressed onto the cylinder tube” 1 ", ie the decrease in force” 8 "is brought to a standstill.
  • FIG. 7 and 8 show a further embodiment variant in which, instead of the annular pistons "13a” and “13b", several individual pistons “24", “25”, “26”, “27” and “28” occur. Two individual pistons work together. From Fig. 7 it can be seen that the transmission members press the brake cone by means of spring tension, the brake "12" is thus fixed, i.e. pistons "26a” and “26b" are not under fluid pressure.
  • the rodless drive as shown in these two figures, consists of a slotted cylinder tube "29" in which there is a piston "30” which forms a unit with the power bridge "30a".
  • Braking by means of electromagnets is a further possibility, not shown, of equipping the subject of the invention, it also being possible here to advantageously use the cone principle used.
  • the function of the brake device proposed by the invention is independent of the pressure conditions prevailing on the piston “2” or in the cylinder tube “1”.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Braking Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

A brake assembly is provided for a fluid operated piston and cylinder device having a force applying cross head operating through a slot in the cylinder wall. The brake assembly is integrated with the cross head and consists of brake lining concentrically arranged about the cylinder for engagement with the outer surface of the cylinder. The brake assembly is actuated by a drive mechanism to engage the cylinder outer surface so as to stop, lock and/or position the piston as required.

Description

Die Erfindung bezieht sich auf eine Bremseinrichtung für kolbenstangenlose Arbeitszylinder,'vorzugsweise für das Anhalten, Festhalten und Positionieren von fluidgetriebenen kolbenstangenlosen Arbeitszylindern, die beispielsweise mittels eines umlaufenden Ubertragungsgliedes, z.B. eines Stahlbandes, einer Kraftbrükke, eines Magnetfeldes oder dgl. die Antriebskraft des Kolbens auf eine Kraftabnahme übertragen, wobei diese Bremseinrichtung von einem Fluid, einer Feder oder dgl. betätigt wird.The invention relates to a brake device for rodless working cylinders, preferably for stopping, holding and positioning fluid-driven piston rodless working cylinders, which are operated, for example, by means of a rotating transmission element, e.g. a steel belt, a power bridge, a magnetic field or the like. Transfer the driving force of the piston to a decrease in force, this braking device being actuated by a fluid, a spring or the like.

Antriebe allgemein, so auch fluidgetriebene kolbenstangenlose Antriebe müssen z.B. exakt angehalten, festgehalten und auch positioniert werden können, sollen sie einer Vielzahl von Aufgaben voll gerecht werden. Das Abbremsen eines solchen Antriebes, z.B. eines Pneumatikzylinders, eines sogenannten Bandzylinders odgl. ist praktisch schwierig zu lösen. Dies liegt in der Natur dieser Antriebe bedingt, vor allem, wenn das Antriebsmittel ein kompressives Fluid, z.B. ein Gas ist und außerdem sich noch ändernde Belastungen des Antriebes zusätzlich auswirken.Actuators in general, such as fluid-driven piston rodless drives, for example, must be able to be stopped, held and also positioned precisely if they are to be able to fully perform a variety of tasks. The braking of such a drive, for example a pneumatic cylinder, a so-called band cylinder or the like. is practically difficult to solve. This is due to the nature of these drives, especially if the drive means is a compressive fluid, for example a gas, and in addition changing loads on the drive have an additional effect.

So wurde bereits vorgeschlagen, für die axialbewegbare Kolbenstange eines Pneumatikzylinderantriebes eine Feststellbremse festsitzend auf dessen Zylinderkopf anzubringen. Die Feststellbremse besteht dabei im wesentlichen aus einem am Zylinderkopf befestigten Aluminiumgehäuse, einem Exzenter mit Kupplungshebel und einem einfach- oder doppeltwirkenden Pneumatikzylinder. Dabei wird die Kolbenstange des Antriebes innerhalb des Exzenters geführt und innerhalb des Aluminiumgehäuses gleitend gelagert. Auch vom Innendruck im Zylinder abhängige, als Sicherheitseinrichtungen wirkende Systeme sind bekannt, dabei spricht ein Federelement auf einen bestimmten Differenzdruck an und der Kolben läuft nur noch bis zum Stillstand.It has already been proposed, for the axially movable piston rod of a pneumatic cylinder drive, to apply a parking brake firmly to its cylinder head. The parking brake consists essentially of an aluminum housing attached to the cylinder head, an eccentric with clutch lever and a single or double-acting pneumatic cylinder. The piston rod of the drive is guided within the eccentric and slidably supported within the aluminum housing. Systems which act as safety devices and are dependent on the internal pressure in the cylinder are also known, in this case a spring element responds to a specific differential pressure and the piston only runs to a standstill.

Für sogenannte kolbenstangenlose Arbeitszylinder, wie z.B. Bandzylinder, Seilzylinder oder dergleichen ist eine solche auf die Kolbenstange des Antriebes wirkende Feststelleinrichtung wegen Fehlens desselbens nicht einsetzbar. Sie kann auch nicht so abgewandelt werden, daß sie auf dem Zylinderrohr eines Bandzylinders oder dergleichen beweglich anbringbar ist.For so-called rodless working cylinders, e.g. Band cylinder, rope cylinder or the like, such a locking device acting on the piston rod of the drive cannot be used due to the lack thereof. It can also not be modified so that it can be movably attached to the cylinder tube of a band cylinder or the like.

Wird die Feststelleinrichtung auf dem Zylinderrohr eines Bandzylinders, nämlich unbeweglich, befestigt, dann müßte sie das bewegliche Ubertragungsglied, z.B. das Stahlband, abbremsen, also ein Glied, das an sich schon in der Handhabung diffizil ist und bis in den Grenzbereich seiner Dauerbelastung belastet ist. Eine Bremseinrichtung für einen Bandzylinder sollte die Bewegungen des Bandes bzw. eines sonstigen übertragungsgliedes mitmachen und sich dabei auf dem Zylinderrohr abstützen können.If the locking device is fastened to the cylinder tube of a band cylinder, namely immovably, then it would have to have the movable transmission member, e.g. brake the steel belt, i.e. a link that is intrinsically difficult to handle and is loaded to the limit of its permanent load. A braking device for a band cylinder should follow the movements of the band or another transmission element and be able to support itself on the cylinder tube.

Es ist zwar schon vorgeschlagen worden (DE OS 2453 948) eine Bremseinrichtung innen auf die Innenwand des Zylinders einwirken zu lassen. Eine solche Bremseinrichtung besitzt den gravierenden Nachteil, als Rollenbremse auf die inneren Lauffläche eines Zylinders einzuwirken, wobei sie die Lauffläche beschädigen wird und nur als Fallsicherung wirken kann, wenn eine Betriebsstörung des Arbeitszylinders vorliegt. Derartige federbelastete Rollenbremsen sind darüberhinaus für das Anhalten und Positionieren eines kolbenstangenlosen Arbeitszylinders nicht brauchbar.It has already been proposed (DE OS 2453 948) to have a braking device act on the inside of the inner wall of the cylinder. Such a braking device has the serious disadvantage that it acts as a roller brake on the inner tread of a cylinder, wherein it will damage the tread and can only act as a fall protection if there is a malfunction of the working cylinder. Such spring-loaded roller brakes are also not useful for stopping and positioning a rodless cylinder.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Bremseinrichtung zum Anhalten, Festhalten und Positionieren für fluidgetriebene Zylinderantriebe, beispielsweise Bandzylinder oder dgl., zu besitzen, die besonders wenig Platz benötigt und die Nachteile der bekannten Einrichtungen dieser Art mit Sicherheit vermeidet.The invention is therefore based on the object of possessing a braking device for stopping, holding and positioning for fluid-driven cylinder drives, for example belt cylinders or the like, which requires particularly little space and certainly avoids the disadvantages of the known devices of this type.

Erfindungsgemäß wird dies dadurch erreicht, daß die Bremseinrichtung mit mindestens einem Bremsbelag das Zylinderrohr konzentrisch umfaßt und in die Kraftabnahme integriert ist.According to the invention this is achieved in that the braking device concentrically surrounds the cylinder tube with at least one brake pad and is integrated in the power take-off.

Vorteilhafterweise besteht die Bremseinrichtung aus einem um das Zylinderrohr herumgelegten, von einem Fluid auffüllbaren Balg als Antrieb für die Bremsbeläge.Advantageously, the braking device consists of a bellows which is placed around the cylinder tube and can be filled with a fluid as a drive for the brake linings.

Eine weitere vorteilhafte Ausführungsvariante sieht vor, daß ein oder mehrere von einem Fluid beaufschlagbare Kolben angeordnet sind, die über einen Konus auf die Bremsbeläge einwirken und durch Federkraft in ihren Ruhelagen gehalten werden.Another advantageous embodiment provides that one or more pistons which can be acted upon by a fluid are arranged, which act on the brake linings via a cone and are held in their rest positions by spring force.

Der Vorteil einer solchen Anordnung, der erfindungsgemäß vorgeschlagenen, in die Kraftabnahme eines kolbenstangenlosen Arbeitszylinders integrierten und das Zylinderrohr mit mindestens einem Bremsbelag umfassenden Bremseinrichtung ist insbesondere darin zu sehen, daß eine Überbeanspruchung des übertragungsgliedes, also des Bandes, Seiles oder dgl., mit Sicherheit vermieden wird, bei voller Nutzbarkeit der zur Verfügung stehenden Bremsenergie und weiterhin dahin, daß die Bremseinrichtung universell einsetzbar ist, worunter die Möglichkeit zu verstehen ist, die Bremseinrichtung auf die unterschiedlichsten fluidgetriebenen Antriebssysteme aufsetzen zu können. Es ist damit sogar möglich, den sogenannten Belastungsgrenzfall zu beherrschen, also wenn die Verzögerung größer als die Kraft ist, für die das Antriebselement, insbesondere das übertragungsglied ausgelegt ist. Die zur Verfügung stehende Bremskraft kann größer als die Antriebskraft sein, die Bremseinrichtung wirkt dann also völlig unabhängig vom im Zylinder herrschenden Druck. Außerdem ist es von Vorteil, daß die Bremseinrichtung auf den äußeren Umfang des Zylinderrohres einwirkt und nicht mittels federbelasteter Rollen auf die innere Lauffläche des Zylinders, die keinerlei Einwirkungen von Fremdkörpern ausgesetzt werden darf.The advantage of such an arrangement, the brake device proposed according to the invention and integrated into the power take-off of a rodless working cylinder and comprising the cylinder tube with at least one brake pad, is to be seen in particular in that overstressing of the transmission member, i.e. the belt, rope or the like, is avoided with certainty will, with full usability of the available braking energy and further to the fact that the braking device can be used universally, which is to be understood as the possibility of being able to place the braking device on a wide variety of fluid-driven drive systems. It is thus even possible to master the so-called load limit case, that is, if the deceleration is greater than the force for which the drive element, in particular the transmission element, is designed. The braking force available can be greater than the driving force, so the braking device then acts completely independently of the pressure prevailing in the cylinder. It is also advantageous that the braking device acts on the outer circumference of the cylinder tube and not by means of spring-loaded rollers on the inner running surface of the cylinder, which must not be exposed to any foreign bodies.

Ein weiterer Vorteil der erfindungsgemäß vorgeschlagenen Bremseinrichtung liegt darin, daß damit außer einer Brems- bzw. Anhalte- und Positionierungseinrichtung, auch eine Lösung des Problemes von Sicherheitseinrichtungen für solche Antriebssysteme gegeben ist, die auf den Antrieb wirken, wenn z.B. der Druck im Fluidsystem abfällt, wobei es keine Rolle spielt, ob der Arbeitszylinder sich senkrecht oder in einer anderen Lage befindet. Unter kolbenstangenlosen Arbeitszylindern, für die der mit der Erfindung vorgeschlagene Gegenstand besonders geeignet ist, werden solche Antriebe verstanden, bei denen die Kraft des Zylinders, d.h. des Antriebselementes entweder über eine Kraftbrücke durch einen Schlitz im Zylinderrohr oder über Magnete oder über umlaufende Bänder, Seile, Stahlseile- Kunststoff-Bänder oder Kombinationen davon vom Kolben nach außen übertragen wird.Another advantage of the braking device proposed according to the invention is that, in addition to a braking or stopping and positioning device, there is also a solution to the problem of safety devices for those drive systems which act on the drive if, for example, the pressure in the fluid system drops, it does not matter whether the cylinder is vertical or in a different position. Rodless working cylinders, for which the object proposed by the invention is particularly suitable, are understood to mean drives in which the force of the cylinder, ie the drive element, either via a power bridge through a slot in the cylinder tube or via magnets or via circumferential belts, ropes, Steel wire-plastic straps or combinations thereof is transferred from the piston to the outside.

Die Erfindung ist nachstehend anhand eines in den Abbildungen dargestellten Ausführungsbeispieles näher erläutert.The invention is explained below with reference to an embodiment shown in the figures.

Es zeigt

  • Fig. 1 - eine Ansicht des kolbenstangenlosen Arbeitszylinders in der Ausbildung als Bandzylinder
  • Fig. 2 - einen Schnitt in Richtung A - A der Abbildung 1
  • Fig. 3 - eine Ausführungsvariante der Bremseinrichtung
  • Fig. 4 - ein Schnitt durch Fig. 3 in Richtung B - B
  • Fig. 5 -,
  • Fig. 6 - und
  • Fig. 7 - weitere Ausführungsvarianten
  • Fig. 8 - einen Schnitt durch die Fig. 7 in Richtung C - C
It shows
  • Fig. 1 - a view of the rodless working cylinder in the form of a band cylinder
  • 2 - a section in the direction A - A of Figure 1
  • Fig. 3 - an embodiment of the braking device
  • Fig. 4 - a section through Fig. 3 in the direction B - B
  • Fig. 5 -,
  • Fig. 6 - and
  • Fig. 7 - further variants
  • Fig. 8 - a section through Fig. 7 in the direction C - C

In Fig. 1 ist ein kolbenstangenloser Arbeitszylinder in der Ausbildung als Bandzylinder dargestellt. In der Abbildung ist das Zylinderrohr selbst mit "1" bezeichnet, der Kolben mit "2", der in einem aufgebrochenen Fenster des Zylinderrohres "1" dargestellt ist. Mit "3" ist das Übertragungsglied als Stahlband dargestellt. Dieses Stahlband "3" ist am Kolben "2" rechts und links befestigt und läuft über Rollen "4" und "5" in den Zylinderköpfen "6" und "7". Die Kraftabnahme "8" ist mit dem Band "3" fest verbunden. In diese Kraftabnahme "8" ist die Bremseinrichtung "9" fest integriert. Mit "10" ist ein Stutzen für die Zuleitung des Fluids für die'Bremseinrichtung bezeichnet.In Fig. 1 a rodless cylinder is shown in the form of a band cylinder. In the figure, the cylinder tube itself is labeled "1", the piston "2", which is shown in a broken window of the cylinder tube "1". With "3" the transmission link is shown as a steel belt. This steel belt "3" is attached to the piston "2" on the right and left and runs over rollers "4" and "5" in the cylinder heads "6" and "7". The power take-off "8" is fixed with the tape "3" connected. The braking device "9" is firmly integrated into this power take-off "8". With "10" is a nozzle for the supply of fluid for the ' braking device.

Wird der Kolben "2" durch Einleiten eines Fluids in das Zylinderrohr "1", beispielsweise von links nach rechts, bewegt, so bewegt sich gleichzeitig die Kraftabnahme "8" durch Band "3", von rechts nach links.If the piston "2" is moved by introducing a fluid into the cylinder tube "1", for example from left to right, the power take-off "8" through band "3" moves from right to left at the same time.

Soll auf dem Wege, den die Kraftabnahme "8" zurücklegt, dieselbe angehalten werden, so wird durch den Stutzen "10" ein Fluid in die Bremseinrichtung "9" gepreßt, wodurch sich der Balg "11" ausdehnt und über die Bremsbeläge "12", die dadurch gegen das Zylinderrohr "1" gepreßt werden, die Kraftabnahme zum Stoppen bringt. Wird der Druck im Balg "11" wieder aufgehoben, läßt sich die Kraftabnahme zusammen mit dem Kolben "2" wieder bewegen. Die Bremseinrichtung gleitet dabei stets auf dem Zylinderrohr "1", mittels in den Abbildungen 1 und 2 nicht dargestellten Gleitbändern. Anstelle von Gleitbändern können selbstverständlich auch andere geeignete Einrichtungen dafür eingesetzt werden.If the same is to be stopped on the way that the power take-off "8" travels, a fluid is pressed into the braking device "9" through the connector "10", whereby the bellows "11" expands and via the brake pads "12" , which are pressed against the cylinder tube "1", which stops the power take-off. If the pressure in bellows "11" is released again, the power take-off can be moved together with piston "2". The braking device always slides on the cylinder tube "1" by means of sliding bands, not shown in Figures 1 and 2. Instead of sliding bands, other suitable devices can of course also be used for this.

Die Fig. 3 zeigt eine Ausführungsvariante der Bremseinrichtung. Anstelle eines Balges "11" sind dort zwei Ringkolben "13a" und "13b" vorgesehen. Die beiden Ringkolben "13a" und "13b" sind mittels einer Feder "14" gegeneinander verspannt und in ihre Endlagen gepreßt. Die Kolben "13a" und "13b" wirken über Übertragungsglieder "15a" und "15b", die eine konische Lauffläche besitzen, über entsprechend geformte Gegenglieder "16a" und "16b" auf das eigentliche Bremselement, das aus einem oder mehreren Bremsbelägen "12" besteht, ein. Mit "17" und "18" sind Gleitbänder bezeichnet, mit denen die Bremseinrichtung "9" auf dem Zylinderrohr "1" gleiten kann. Die Zuführung des Fluids in die Bremsrichtung erfolgt über Zuführungen "19" und "20".3 shows an embodiment variant of the braking device. Instead of a bellows "11" there are two annular pistons "13a" and "13b". The two ring pistons "13a" and "13b" are clamped against each other by means of a spring "14" and pressed into their end positions. The pistons "13a" and "13b" act on the actual brake element, which consists of one or more brake pads "12, via transmission members" 15a "and" 15b ", which have a conical running surface, via correspondingly shaped counter-members" 16a "and" 16b " "consists of. "17" and "18" denote sliding bands with which the braking device "9" can slide on the cylinder tube "1". The fluid is fed in the braking direction via feeds "19" and "20".

Die in der Abbildung 3 dargestellte Ruhestellung des Bremselementes zeigt den Zustand ohne Bremswirkung, in dem das Fluid durch die Zuführungen "19" und "20" auf die Kolben "13a" und "13b" einwirkt und gegen die Federspannung nach innen drückt und die Gegenglieder (Konen) "16a" und "16b" freigibt. Wird der Druck des Fluids auf die Kolben "13a" und "13b" aufgehoben, drückt die Feder "14" die Kolben über die Übertragungsglieder "15a" und "15b" in die Endlagen und die Bremswirkung tritt wieder ein.The rest position of the braking element shown in Figure 3 shows the state without braking effect, in which the fluid acts through the feeds "19" and "20" on the pistons "13a" and "13b" and presses inward against the spring tension and the counterparts (Cones) "16a" and "16b" releases. If the pressure of the fluid on the pistons "13a" and "13b" is released, the spring "14" presses the pistons into the end positions via the transmission members "15a" and "15b" and the braking effect reappears.

In Fig. 4 ist ein Schnitt durch die Bremseinrichtung gemäß Fig. 3 dargestellt. Aus beiden Abbildungen ist ersichtlich, daß die Bremseinrichtung dieser Ausführungsvariante dazu dient, die Kraftabnahme "8" an einem bestimmten Ort festzuhalten und bei Zuführung des Fluids durch die Zuführungen "19" und "20" diese Positionierung aufzuheben. Somit ist durch den Kolben "2" auch die Kraftabnahme "8" wieder bewegbar und zwar solange, bis der Druck des Fluids in der Bremseinrichtung aufgehoben wird.FIG. 4 shows a section through the braking device according to FIG. 3. From both figures it can be seen that the braking device of this embodiment variant serves to hold the power take-off "8" at a specific location and to cancel this positioning when the fluid is fed through the feeders "19" and "20". Thus, the power take-off "8" can be moved again by the piston "2" until the pressure of the fluid in the braking device is released.

Abbildung 5 zeigt einen Längsschnitt durch eine Ausführungsvariante mit einem oder mehreren Kolben "26a" und "26b" anstelle der Ringkolben "13a" und "13b". Diese Kolben "26" sind, falls mehrere dafür vorgesehen, kreisförmig um das Zylinderrohr angeordnet.Figure 5 shows a longitudinal section through an embodiment with one or more pistons "26a" and "26b" instead of the annular pistons "13a" and "13b". If several are provided, these pistons "26" are arranged in a circle around the cylinder tube.

Die in der Abbildung 6 dargestellte Ausführungsvariante wirkt umgekehrt wie die in der Fig. 3 und 4 beschriebene, also entsprechend der Fig. 2. Der Ringkolben "13a" und "13b" wird durch die Feder "14" zwar ebenfalls in der äußeren Lage verspannt gehalten, jedoch ist das konische Übertragungsglied "15a" bzw. "15b" der Abbildung 3 / 4 als Übertragungsglied "21" bzw. "22" dargestellt, die auf ein Gegenglied "23" einwirken, jedoch in umgekehrter Weise, nämlich so, daß bei Beaufschlagung der Kolben "13a" bzw. "13b" durch ein Fluid die Ubertragungsglieder "21" und "22" gegen die konische Fläche des Gegengliedes "23" gepreßt werden und somit die Bremsbeläge "12" auf das Zylinderrohr "1" gepreßt werden, d.h. die Kraftabnahme "8" zum Stillstand gebracht wird.The embodiment variant shown in FIG. 6 acts in the opposite way to that described in FIGS. 3 and 4, that is to say corresponding to FIG. 2. The annular piston “13a” and “13b” is also tensioned in the outer position by the spring “14” held, however, that is conical Transfer member of the image 3/4 shown "15a" and "15b" as the transmission member "21" or "22" responsive to a G egenglied "23" act, but in a reverse manner, namely so that, when acting upon the piston " 13a "or" 13b "are pressed by a fluid, the transmission members" 21 "and" 22 "against the conical surface of the counter member" 23 "and thus the brake pads" 12 "are pressed onto the cylinder tube" 1 ", ie the decrease in force" 8 "is brought to a standstill.

In den Fig. 7 und 8 ist eine weitere Ausführungsvariante dargestellt, bei der anstelle der Ringkolben "13a" und "13b" mehrere Einzelkolben "24", "25", "26", "27" und "28" treten. Je zwei Einzelkolben wirken zusammen. Aus der Fig. 7 ist ersichtlich, daß die übertragungsglieder mittels Federspannung auf den Bremskonus drükken, die Bremse "12" ist somit fest, d.h. die Kolben "26a" und "26b" stehen nicht unter Fluiddruck.7 and 8 show a further embodiment variant in which, instead of the annular pistons "13a" and "13b", several individual pistons "24", "25", "26", "27" and "28" occur. Two individual pistons work together. From Fig. 7 it can be seen that the transmission members press the brake cone by means of spring tension, the brake "12" is thus fixed, i.e. pistons "26a" and "26b" are not under fluid pressure.

Die Fig. 7 und 8 zeigen deutlich, daß die mit der Erfindung vorgeschlagene Bremseinrichtung universell einsetzbar ist. Der kolbenstangenlose Antrieb, wie er in diesen beiden Abbildungen dargestellt ist, besteht aus einem geschlitzten Zylinderrohr "29", in dem sich ein Kolben "30" befindet, der mit der Kraftbrücke "30a" eine Einheit bildet.7 and 8 clearly show that the braking device proposed with the invention can be used universally. The rodless drive, as shown in these two figures, consists of a slotted cylinder tube "29" in which there is a piston "30" which forms a unit with the power bridge "30a".

Eine Abbremsung mittels Elektromagneten ist eine weitere, nicht dargestellte Möglichkeit, den Erfindungsgegenstand auszustatten, wobei auch hierbei vorteilhafterweise das angewandte Konusprinzip benutzt werden kann.Braking by means of electromagnets is a further possibility, not shown, of equipping the subject of the invention, it also being possible here to advantageously use the cone principle used.

Die mit der Erfindung vorgeschlagene Bremseinrichtung ist in ihrer Funktion von den am Kolben "2" bzw. im Zylinderrohr "1" herrschenden Druckverhältnissen unabhängig.The function of the brake device proposed by the invention is independent of the pressure conditions prevailing on the piston “2” or in the cylinder tube “1”.

Claims (6)

1. Bremseinrichtung für kolbenstangenlose Arbeitszylinder, vorzugsweise für das Anhalten, Festhalten und Positionieren von fluidgetriebenen kolbenstangenlosen Arbeitszylindern, die beispielsweise mittels eines umlaufenden Übertragungsgliedes, z.B. eines Stahlbandes, einer Kraftbrücke, eines Magnetfeldes oder dgl. die Antriebskraft des Kolbens auf eine Kraftabnahme übertragen, wobei diese Bremseinrichtung von einem Fluid, Feder oder dgl. betätigt wird, dadurch gekennzeichnet, daß die Bremseinrichtung (9) mit mindestens einem Bremsbelag (12) das Zylinderrohr (1) konzentrisch umfaßt und in die Kraftabnahme (8) integriert ist.1. Braking device for rodless working cylinders, preferably for stopping, holding and positioning fluid-driven piston rodless working cylinders, for example by means of a rotating transmission member, e.g. of a steel band, a power bridge, a magnetic field or the like. Transfer the driving force of the piston to a decrease in force, this braking device being actuated by a fluid, spring or the like, characterized in that the braking device (9) with at least one brake pad (12) the cylinder tube (1) comprises concentrically and is integrated in the power take-off (8). 2. Bremseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie aus einem um das Zylinderrohr (1) herumgelegten, von einem Fluid auffüllbaren Balg (11) zur Betätigung der Bremsbeläge (12) besteht.2. Braking device according to claim 1, characterized in that it consists of a around the cylinder tube (1), of a fluid-filled bellows (11) for actuating the brake pads (12). 3. Bremseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß ein oder mehrere von einem Fluid beaufschlagbare Kolben (13, 24-28) vorgesehen sind, die über Konusglieder (15, 16, 22, 23) auf die Bremsbeläge (12) einwirken und mittels einer Feder (14) in ihren Endlagen gehalten werden.3. Braking device according to claim 1, characterized in that one or more pistons (13, 24-28) can be acted upon by a fluid, which act on the brake pads (12) via cone members (15, 16, 22, 23) and by means of a spring (14) are held in their end positions. 4. Bremseinrichtung nach Anspruch 1 und 3, dadurch gekennzeichnet, daß der bzw. die Kolben konzentrisch das Zylinderrohr (1) umfassende Ringkolben (13a, 13b) sind.4. Braking device according to claim 1 and 3, characterized in that the piston or pistons are concentrically the cylinder tube (1) comprising annular pistons (13a, 13b). 5. Bremseinrichtung nach Anspruch 1 und 3, dadurch gekennzeichnet, daß die Kolben konzentrisch um das Zylinderrohr (1) angeordnete einzelne Kolben (26a, 26b) sind.5. Braking device according to claim 1 and 3, characterized in that the pistons are arranged concentrically around the cylinder tube (1) individual pistons (26a, 26b). 6. Bremseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß ein elektromagnetisches Betätigungsglied für die Bremsbeläge (12) vorgesehen ist.6. Braking device according to claim 1, characterized in that an electromagnetic actuator for the brake pads (12) is provided.
EP80106882A 1979-11-08 1980-11-08 Brake mechanism for ram cylinders without piston rod Expired EP0029188B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80106882T ATE4741T1 (en) 1979-11-08 1980-11-08 BRAKE DEVICE FOR RODLESS WORK CYLINDER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2945133 1979-11-08
DE2945133A DE2945133C2 (en) 1979-11-08 1979-11-08 Braking device for fluid-driven, rodless working cylinders

Publications (3)

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EP0029188A2 true EP0029188A2 (en) 1981-05-27
EP0029188A3 EP0029188A3 (en) 1981-06-03
EP0029188B1 EP0029188B1 (en) 1983-09-21

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EP80106882A Expired EP0029188B1 (en) 1979-11-08 1980-11-08 Brake mechanism for ram cylinders without piston rod

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US (1) US4419924A (en)
EP (1) EP0029188B1 (en)
JP (1) JPS56134605A (en)
AT (1) ATE4741T1 (en)
CA (1) CA1145687A (en)
DE (2) DE2945133C2 (en)
SU (1) SU1064875A3 (en)
YU (1) YU285580A (en)
ZA (1) ZA806848B (en)

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EP0104364A1 (en) * 1982-08-05 1984-04-04 Knorr-Bremse Ag Rodless fluidic motor with brake means
EP0177850A1 (en) * 1982-08-05 1986-04-16 Knorr-Bremse Ag Rodless hydraulic ram
EP0103852A1 (en) * 1982-09-20 1984-03-28 IMI Norgren AG Rectilinear command
DE3403830A1 (en) * 1983-04-12 1984-10-18 Knorr-Bremse GmbH, 8000 München Fluid-operated, rodless working cylinder
EP0136436A1 (en) * 1983-08-05 1985-04-10 Robert Bosch Gmbh Working cylinder without piston rod
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FR2758164A1 (en) * 1997-01-08 1998-07-10 Parker Hannifin Sa Braking unit for rodless jack with external slide

Also Published As

Publication number Publication date
CA1145687A (en) 1983-05-03
DE3064973D1 (en) 1983-10-27
ZA806848B (en) 1981-11-25
JPS56134605A (en) 1981-10-21
DE2945133C2 (en) 1983-09-01
DE2945133A1 (en) 1981-06-11
ATE4741T1 (en) 1983-10-15
EP0029188A3 (en) 1981-06-03
SU1064875A3 (en) 1983-12-30
EP0029188B1 (en) 1983-09-21
YU285580A (en) 1983-01-21
US4419924A (en) 1983-12-13

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