WO2001014751A1 - Shaft mounting - Google Patents

Shaft mounting Download PDF

Info

Publication number
WO2001014751A1
WO2001014751A1 PCT/EP2000/008191 EP0008191W WO0114751A1 WO 2001014751 A1 WO2001014751 A1 WO 2001014751A1 EP 0008191 W EP0008191 W EP 0008191W WO 0114751 A1 WO0114751 A1 WO 0114751A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
piston
actuator according
cylinder
know
Prior art date
Application number
PCT/EP2000/008191
Other languages
German (de)
French (fr)
Inventor
Peter Hessling
Original Assignee
Alfa Laval Flow 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
Application filed by Alfa Laval Flow Gmbh filed Critical Alfa Laval Flow Gmbh
Priority to AT00958486T priority Critical patent/ATE242433T1/en
Priority to DE50002472T priority patent/DE50002472D1/en
Priority to EP00958486A priority patent/EP1212537B1/en
Priority to AU69985/00A priority patent/AU6998500A/en
Publication of WO2001014751A1 publication Critical patent/WO2001014751A1/en

Links

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
    • F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
    • F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
    • F15B15/065—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement the motor being of the rack-and-pinion type

Definitions

  • the present invention relates to a pneumatic actuator with the features of the preamble of claim 1.
  • Such an actuator is known from German utility model G9014487.2.
  • the output shaft is mounted in the housing with two end shields.
  • the end shields are inserted into the housing from the inside, which forms the cylinder, and the shaft is also fixed in its axial direction from the inside with external circlips or snap rings.
  • the assembly of the bearings and the circlips from the working space of the cylinder is a relatively difficult manual operation that causes undesirable costs. It is therefore an object of the present invention to improve a pneumatic actuator in such a way that the assembly of the shaft and the piston in the housing can be carried out more easily and fewer components are required overall.
  • the piston positively fixes the shaft in its axial direction, the shaft can be moved axially until the piston is inserted and can thus be brought into position without additional fixing elements. As soon as the piston is inserted, the positive locking results in the axial fixation, which is achieved in the prior art by end shields and locking rings.
  • the shaft has at least one groove aligned in the circumferential direction, which is in engagement with a web of the piston extending in the axial direction.
  • the shaft also has two bearing areas, which form areas of the largest diameter of the shaft, the shaft can be easily inserted into the housing from the outside and fitted in the area of the bearing points. There is essentially no need for separate bearings if the shaft is mounted in two bearing points directly in the housing. The bearing of the shaft remains almost force-free if the bearing points of the shaft have essentially the same diameter and the pressure load in both directions is thereby canceled out. This also requires the service life of the shaft to be fixed in the area of the webs and grooves.
  • the groove can be made particularly easily when manufacturing the shaft if it is a circumferentially pierced groove.
  • a symmetrical arrangement, which allows the use of two identical pistons, is obtained if each piston has a total of two webs adjacent to the toothing. It can also be provided that the working space in the area of the bearing points of the shaft is sealed against the outside space by means of m sealing rings made of rubber or a plastic which are each m in a groove of the shaft.
  • a particularly advantageous method for mounting an actuator described so far is obtained if the shaft m is inserted into the bearing points and then the piston or pistons are brought into engagement with the shaft, so that the shaft is fixed in the axial direction without further fastening means and in particular in the Bearing is held.
  • FIG. 1 a cross section through an actuator according to the invention along the axial direction of the shaft when viewed in the direction of the longitudinal axis of the cylinder; such as
  • Figure 2 shows a cross section through an actuator along the longitudinal axis of the cylinder, the viewing direction coinciding with the axial direction of the shaft.
  • 1 shows a pneumatic actuator according to the invention with a housing 1, a shaft 3 rotatably mounted in the housing about an axis 2, and two pneumatic pistons 4 and 5.
  • the housing 1 forms on its inside a cylindrical bore 6, in which the pistons 4 and 5 are inserted sealingly to form a working space.
  • the longitudinal axis of the bore 6 is oriented perpendicular to the plane of the drawing in FIG. 1.
  • the shaft 3 is essentially rotationally symmetrical and has the following areas from bottom to top in FIG. 1:
  • the lower end of the shaft forms a bearing area 10, which also represents a location of the largest diameter of the shaft 3.
  • a pierced groove 11 adjoins the bearing area 10 and is provided with a box-shaped cross section. Adjacent to the groove 11 is a toothing 12 in the manner of a pinion with tooth flanks oriented parallel to the axis 2. The upper end of the toothing 12 in turn borders on a circumferentially recessed groove 13, which in turn borders on a bearing area 14.
  • the bearing area 14 of the shaft 3, like the bearing area 10, is flush with the outside of the housing 1.
  • a double flat 15 is provided as the output of the actuator, as is usually used.
  • the pistons 4 and 5 are cut in the illustration according to FIG. 1 in the area of their engagement with the shaft 3.
  • the pistons 4 and 5 each have a toothing 20 directed straight ahead in the manner of a toothed rack, which meshes with the toothing 12 of the shaft 3 m stands.
  • the axial edges of the toothing 20 each adjoin a web 21 which is integrally formed with the piston 4 or 5 and which engages the grooves 11 or 13.
  • the housing 1 itself has a through hole running in the direction of the axis 2, which intersects the central axis of the cylinder 6 in the middle and vertically.
  • This bore forms bearing points 22 which, together with the bearing points 10 and 14 of the shaft 3, form a sliding bearing for the rotation of the shaft 3 about the axis 2.
  • the interior of the cylinder 6 is sealed from the atmosphere with sealing means, not shown, for example in the form of O-rings.
  • FIG. 2 shows the actuator according to FIG. 1 in a cross section along the axis of the cylinder 6.
  • the axis 2 of the shaft 3 is oriented perpendicular to the plane of the drawing in the illustration according to FIG.
  • the same components have the same reference numbers.
  • FIG. 2 illustrates how the pistons 4 and 5 surround the shaft 3 symmetrically, the pistons 4 and 5 carry piston bottoms 30, which cooperate sealingly with the cylinder 6 and to which the rack-like region with the toothing 20 adjoins.
  • the housing 1 itself is closed on the end faces of the cylinder bore 6 with plate-shaped cylinder heads 31.
  • the pistons 4, 5, the cylinder bore 6 and the cylinder heads 31 limit a total of three working spaces 32, 33 and 34, of which the working spaces 32 and 34 are pneumatically connected in parallel and the working space 33 can be pressurized separately.
  • Corresponding connection bores for the working spaces 32, 33 and 34 are identified by the reference numbers 35, 36 and 37.
  • the present actuator is assembled by first inserting the housing 1, more precisely, the shaft 3 in the direction of the axis 2 into the through bore with the bearing points 22 until the position of FIG. 1 is reached. Then a piston is inserted from each of the open ends of the cylinder bore 6 to each side of the shaft 3 hm, so that the toothings 20 engage synchronously with the toothing 12. At the same time, the webs 21 running parallel to the toothing 12 engage in the grooves 11, 13. The pistons 4, 5 are then symmetrically pressed into the bore 6, as a result of which the shaft 3 is rotated about its axis 2, the toothings 12 and 20 engage in one another and the webs 21 slide into the grooves 11, 13. Due to the positive engagement of the webs 21 in the grooves 11, 13, the shaft is fixed in the direction of the axis 2 without the need for further fastening means. The cylinder 6 is now closed with the cylinder heads 31 and the required pneumatic connections are provided.
  • the working space 33 is now pressurized, so that the pistons 4 and 5 are pushed outward.
  • this leads to a rotation of the shaft 3 counterclockwise, while the working spaces 32 and 34 are vented.
  • the working spaces 32 and 34 are pressurized, while the working space 33 is vented. This mode of operation is known from the prior art.
  • the grooves are on the side Adjacent toothing 12 and the pistons 4 and 5 each have two webs 21.
  • the outer boundary of the webs 21 should come into contact with the outer walls of the grooves 11, 13 during operation, while the webs 21 are at a short distance from the toothing 12.
  • the axial guidance of the shaft 3 is then effected only by the flanks of the pistons during operation.
  • Aluminum materials for the housing 1 and the shaft 3 and plastic for the pistons 4 and 5 are currently preferred as materials for an actuator according to the invention. Sealing in the area of the bearing points can be done using self-lubricating plastics. However, other materials or material combinations are also conceivable.
  • the bearing itself is only slightly stressed in operation, since it is an actuator as used for the actuation of valves.

Abstract

The invention relates to a pneumatic actuator comprising a housing (1), which has a pneumatic cylinder (6), and comprising at least one piston (4, 5). Said piston can move inside the cylinder (6) in the direction of the axis of the cylinder (6) and, together with the cylinder (6), delimits a working space (32, 33, 34). The piston (4, 5) has a gearing (20) which extends in a direction of the axis. The inventive pneumatic actuator also comprises a shaft (3) which can rotate around an axial direction (2), whose axial direction (2) is vertical in relation to the axis, and which has a gearing (12) that engages with the gearing (20) of the piston (4, 5). A less complex structure is obtained by virtue of the fact that the piston (4, 5) fixes the shaft (3) with positive engagement in the axial direction thereof (2).

Description

Wellenlagerungshaft bearing
Die vorliegende Erfindung betrifft einen pneumatischen Aktuator mit den Merkmalen des Oberbegriffs des Anspruchs 1.The present invention relates to a pneumatic actuator with the features of the preamble of claim 1.
Ein derartiger Aktuator ist aus dem deutschen Gebrauchsmuster G9014487.2 bekannt. Bei den bekannten Aktuatoren wird die Abtriebswelle mit zwei Lagerschilden in dem Gehäuse gelagert. Die Lagerschilde werden von der Innenseite, die den Zylinder bildet, in das Gehäuse eingesetzt, und die Welle wird ebenfalls von innen her mit Außensicherungsringen oder Sprengringen in ihrer Axialrichtung fixiert. Die Montage der Lager und der Sicherungsringe vom Arbeitsraum des Zylinders her ist eine relativ schwierig auszuführende manuelle Tätigkeit, die unerwünschte Kosten verursacht. Es ist deshalb Aufgabe der vorliegenden Erfindung, einen pneumatischen Aktuator dahingehend zu verbessern, daß die Montage der Welle und der Kolben m dem Gehäuse einfacher erfolgen kann und insgesamt weniger Bauelemente benotigt werden .Such an actuator is known from German utility model G9014487.2. In the known actuators, the output shaft is mounted in the housing with two end shields. The end shields are inserted into the housing from the inside, which forms the cylinder, and the shaft is also fixed in its axial direction from the inside with external circlips or snap rings. The assembly of the bearings and the circlips from the working space of the cylinder is a relatively difficult manual operation that causes undesirable costs. It is therefore an object of the present invention to improve a pneumatic actuator in such a way that the assembly of the shaft and the piston in the housing can be carried out more easily and fewer components are required overall.
Diese Aufgabe wird von einem Aktuator mit den Merkmalen des Anspruchs 1 gelost.This object is achieved by an actuator with the features of claim 1.
Weil vorgesehen ist, daß der Kolben die Welle m ihrer Axialrichtung formschlussig fixiert, kann die Welle bis zum Einfuhren des Kolbens axial bewegt werden und so ohne zusätzliche Fixierungselemente an ihre Position gebracht werden. Sobald der Kolben eingesetzt wird, ergibt sich aus dem Formschluß die axiale Fixierung, die im Stand der Technik durch Lagerschilde und Sicherungsringe bewirkt wird.Because it is provided that the piston positively fixes the shaft in its axial direction, the shaft can be moved axially until the piston is inserted and can thus be brought into position without additional fixing elements. As soon as the piston is inserted, the positive locking results in the axial fixation, which is achieved in the prior art by end shields and locking rings.
Dabei ergibt sich eine besonders einfache Ausfuhrungsform, wenn die Welle wenigstens eine in ümfangsπchtung ausgerichtete Nut aufweist, die mit einem m Achsrichtung verlaufenden Steg des Kolbens in Eingriff steht. Wenn weiter die Welle zwei Lagerbereiche aufweist, die Bereiche des größten Durchmessers der Welle bilden, so kann die Welle ohne weiteres von außen her in das Gehäuse eingeführt und im Bereich der Lagerstellen eingepaßt werden. Auf separate Lager kann im wesentlichen verzichtet werden, wenn die Welle m zwei Lagerstellen unmittelbar m dem Gehäuse gelagert ist. Die Lagerung der Welle bleibt nahezu kraftefrei, wenn die Lagerstellen der Welle im wesentlichen den gleichen Durchmesser aufweisen und sich dadurch die Druckbelastung in beiden Richtungen aufhebt. Dies fordert auch die Standzeit der Fixierung der Welle im Bereich der Stege und Nuten. Die Nut kann besonders einfach bei der Fertigung der Welle angebracht werden, wenn es sich um eine umlaufend eingestochene Nut handelt. Eine symmetrische Anordnung, die eine Verwendung von zwei identischen Kolben erlaubt, ergibt sich, wenn jeder Kolben insgesamt zwei der Verzahnung benachbarte Stege aufweist. Es kann auch vorgesehen sein, daß der Arbeitsraum im Bereich der Lagerstellen der Welle mittels m jeweils m einer Nut der Welle einliegenden Dichtringen aus Gummi oder einem Kunststoff gegenüber dem Außenraum abgedichtet ist.This results in a particularly simple embodiment if the shaft has at least one groove aligned in the circumferential direction, which is in engagement with a web of the piston extending in the axial direction. If the shaft also has two bearing areas, which form areas of the largest diameter of the shaft, the shaft can be easily inserted into the housing from the outside and fitted in the area of the bearing points. There is essentially no need for separate bearings if the shaft is mounted in two bearing points directly in the housing. The bearing of the shaft remains almost force-free if the bearing points of the shaft have essentially the same diameter and the pressure load in both directions is thereby canceled out. This also requires the service life of the shaft to be fixed in the area of the webs and grooves. The groove can be made particularly easily when manufacturing the shaft if it is a circumferentially pierced groove. A symmetrical arrangement, which allows the use of two identical pistons, is obtained if each piston has a total of two webs adjacent to the toothing. It can also be provided that the working space in the area of the bearing points of the shaft is sealed against the outside space by means of m sealing rings made of rubber or a plastic which are each m in a groove of the shaft.
Ein besonders vorteilhaftes Verfahren zur Montage eines insoweit beschriebenen Aktuators ergibt sich, wenn zunächst die Welle m die Lagerstellen eingeführt wird und danach der oder die Kolben m Eingriff mit der Welle gebracht werden, so daß die Welle ohne weitere Befestigungsmittel in Axialrichtung fixiert und insbesondere in den Lagerstellen gehalten wird.A particularly advantageous method for mounting an actuator described so far is obtained if the shaft m is inserted into the bearing points and then the piston or pistons are brought into engagement with the shaft, so that the shaft is fixed in the axial direction without further fastening means and in particular in the Bearing is held.
Im folgenden wird ein Ausfuhrungsbeispiel der vorliegenden Erfindung anhand der Zeichnungen beschrieben .An exemplary embodiment of the present invention is described below with reference to the drawings.
Es zeigen:Show it:
Figur 1: Einen Querschnitt durch einen erfmdungsgemaßen Aktuator entlang der Axialrichtung der Welle bei Betrachtung m Richtung der Langsachse des Zylinders; sowieFIG. 1: a cross section through an actuator according to the invention along the axial direction of the shaft when viewed in the direction of the longitudinal axis of the cylinder; such as
Figur 2: einen Querschnitt durch einen Aktuator entlang der Langsachse des Zylinders, wobei die Betrachtungsrichtung mit der Axialrichtung der Welle zusammenfallt. In der Figur 1 ist ein erfmdungsgemaßer pneumatischer Aktuator mit einem Geh use 1, einer in dem Gehäuse um eine Achse 2 drehbar gelagerten Welle 3 sowie zwei Pneumatikkolben 4 und 5 veranschaulicht. Das Gehäuse 1 bildet an seiner Innenseite eine zylindrische Bohrung 6, in die die Kolben 4 und 5 zur Bildung eines Arbeitsraumes dichtend eingesetzt sind. Die Langsachse der Bohrung 6 ist in der Figur 1 senkrecht zur Zeichenebene orientiert.Figure 2 shows a cross section through an actuator along the longitudinal axis of the cylinder, the viewing direction coinciding with the axial direction of the shaft. 1 shows a pneumatic actuator according to the invention with a housing 1, a shaft 3 rotatably mounted in the housing about an axis 2, and two pneumatic pistons 4 and 5. The housing 1 forms on its inside a cylindrical bore 6, in which the pistons 4 and 5 are inserted sealingly to form a working space. The longitudinal axis of the bore 6 is oriented perpendicular to the plane of the drawing in FIG. 1.
Die Welle 3 ist im wesentlichen rotationssymmetrisch ausgebildet und weist von unten nach oben m der Figur 1 folgende Bereiche auf:The shaft 3 is essentially rotationally symmetrical and has the following areas from bottom to top in FIG. 1:
Das untere Ende der Welle bildet einen Lagerbereich 10, der auch eine Stelle des größten Durchmessers der Welle 3 darstellt. An den Lagerbereich 10 schließt eine eingestochene Nut 11 an, die mit einem kastenförmigen Querschnitt versehen ist. Angrenzend an die Nut 11 ist eine Verzahnung 12 nach Art eines Ritzels mit parallel zur Achse 2 orientierten Zahnflanken vorgesehen. Das obere Ende der Verzahnung 12 grenzt wiederum an eine umlaufend eingestochene Nut 13 an, die ihrerseits an einen Lagerbereich 14 grenzt. Der Lagerbereich 14 der Welle 3 schließt ebenso wie der Lagerbereich 10 mit der Außenseite des Gehäuses 1 bundig ab. An dem in Figur 1 oben dargestellten Ende der Welle 3 ist schließlich als Abtrieb des Aktuators ein Zweiflach 15 vorgesehen, wie es üblicherweise verwendet wird.The lower end of the shaft forms a bearing area 10, which also represents a location of the largest diameter of the shaft 3. A pierced groove 11 adjoins the bearing area 10 and is provided with a box-shaped cross section. Adjacent to the groove 11 is a toothing 12 in the manner of a pinion with tooth flanks oriented parallel to the axis 2. The upper end of the toothing 12 in turn borders on a circumferentially recessed groove 13, which in turn borders on a bearing area 14. The bearing area 14 of the shaft 3, like the bearing area 10, is flush with the outside of the housing 1. Finally, at the end of the shaft 3 shown in FIG. 1, a double flat 15 is provided as the output of the actuator, as is usually used.
Die Kolben 4 und 5 sind bei der Darstellung gemäß Figur 1 im Bereich ihres Eingriffs mit der Welle 3 geschnitten. In diesem Bereich tragen die Kolben 4 und 5 jeweils eine nach Art einer Zahnstange geradeaus gerichtete Verzahnung 20, die mit der Verzahnung 12 der Welle 3 m Eingriff steht. Die axialen Rander der Verzahnung 20 grenzen an jeweils einen Steg 21 an, der mit dem Kolben 4 bzw. 5 emstuckig geformt ist und der m die Nuten 11 bzw. 13 eingreift. Das Gehäuse 1 selbst weist eine in Richtung der Achse 2 verlaufende Durchgangsbohrung auf, die die Mittenachse des Zylinders 6 mittig und vertikal schneidet. Diese Bohrung bildet Lagerstellen 22, die mit den Lagerstellen 10 und 14 der Welle 3 zusammen eine Gleitlagerung für die Drehung der Welle 3 um die Achse 2 bildet. Im Bereich der Lagerstellen 22 ist der Innenraum des Zylinders 6 gegenüber der Atmosphäre mit nicht dargestellten Dichtmitteln, beispielsweise in Gestalt von O-Rmgen, abgedichtet.The pistons 4 and 5 are cut in the illustration according to FIG. 1 in the area of their engagement with the shaft 3. In this area, the pistons 4 and 5 each have a toothing 20 directed straight ahead in the manner of a toothed rack, which meshes with the toothing 12 of the shaft 3 m stands. The axial edges of the toothing 20 each adjoin a web 21 which is integrally formed with the piston 4 or 5 and which engages the grooves 11 or 13. The housing 1 itself has a through hole running in the direction of the axis 2, which intersects the central axis of the cylinder 6 in the middle and vertically. This bore forms bearing points 22 which, together with the bearing points 10 and 14 of the shaft 3, form a sliding bearing for the rotation of the shaft 3 about the axis 2. In the area of the bearing points 22, the interior of the cylinder 6 is sealed from the atmosphere with sealing means, not shown, for example in the form of O-rings.
Die Figur 2 zeigt den Aktuator gemäß Figur 1 in einem Querschnitt entlang der Achse des Zylinders 6. Die Achse 2 der Welle 3 ist in der Darstellung gemäß Figur 2 senkrecht zur Zeichenebene orientiert. Gleiche Bauelemente tragen gleiche Bezugsziffern.FIG. 2 shows the actuator according to FIG. 1 in a cross section along the axis of the cylinder 6. The axis 2 of the shaft 3 is oriented perpendicular to the plane of the drawing in the illustration according to FIG. The same components have the same reference numbers.
Die Figur 2 veranschaulicht, wie die Kolben 4 und 5 die Welle 3 symmetrisch umgeben, die Kolben 4 und 5 tragen dichtend mit dem Zylinder 6 zusammenwirkende Kolbenboden 30, an denen sich der zahnstangenartige Bereich mit der Verzahnung 20 anschließt. Das Gehäuse 1 selbst ist an den Stirnseiten der Zylinderbohrung 6 mit plattenformigen Zylinderkopfen 31 verschlossen. Die Kolben 4, 5, die Zylinderbohrung 6 und die Zylinderkopfe 31 begrenzen dabei insgesamt drei Arbeitsraume 32, 33 und 34, von denen die Arbeitsraume 32 und 34 pneumatisch parallel geschaltet werden und der Arbeitsraum 33 separat mit Druck beaufschlagbar ist. Entsprechende Anschlußbohrungen für die Arbeitsraume 32, 33 und 34 sind mit den Bezugsziffern 35, 36 und 37 gekennzeichnet. In der Praxis wird der vorliegende Aktuator montiert, indem zunächst m das Gehäuse 1, genauer gesagt, in die Durchgangsbohrung mit den Lagerstellen 22 die Welle 3 in Richtung der Achse 2 eingeführt wird, bis die Position der Figur 1 erreicht wird. Sodann wird von den offenen Enden der Zylinderbohrung 6 her je ein Kolben zu jeder Seite der Welle 3 hm eingeführt, so daß die Verzahnungen 20 synchron mit der Verzahnung 12 in Eingriff kommen. Gleichzeitig greifen die parallel zur Verzahnung 12 verlaufenden Stege 21 in die Nuten 11, 13 ein. Die Kolben 4, 5 werden dann symmetrisch die Bohrung 6 hineingedruckt, wodurch die Welle 3 um ihre Achse 2 gedreht wird, die Verzahnungen 12 und 20 ineinander eingreifen und die Stege 21 in die Nuten 11, 13 gleiten. Durch den formschlussigen Eingriff der Stege 21 in die Nuten 11, 13 ist die Welle in Richtung der Achse 2 fixiert, ohne daß weitere Befestigungsmittel erforderlich waren. Der Zylinder 6 wird nun mit den Zylinderkopfen 31 verschlossen und die erforderlichen pneumatischen Anschlüsse vorgesehen.FIG. 2 illustrates how the pistons 4 and 5 surround the shaft 3 symmetrically, the pistons 4 and 5 carry piston bottoms 30, which cooperate sealingly with the cylinder 6 and to which the rack-like region with the toothing 20 adjoins. The housing 1 itself is closed on the end faces of the cylinder bore 6 with plate-shaped cylinder heads 31. The pistons 4, 5, the cylinder bore 6 and the cylinder heads 31 limit a total of three working spaces 32, 33 and 34, of which the working spaces 32 and 34 are pneumatically connected in parallel and the working space 33 can be pressurized separately. Corresponding connection bores for the working spaces 32, 33 and 34 are identified by the reference numbers 35, 36 and 37. In practice, the present actuator is assembled by first inserting the housing 1, more precisely, the shaft 3 in the direction of the axis 2 into the through bore with the bearing points 22 until the position of FIG. 1 is reached. Then a piston is inserted from each of the open ends of the cylinder bore 6 to each side of the shaft 3 hm, so that the toothings 20 engage synchronously with the toothing 12. At the same time, the webs 21 running parallel to the toothing 12 engage in the grooves 11, 13. The pistons 4, 5 are then symmetrically pressed into the bore 6, as a result of which the shaft 3 is rotated about its axis 2, the toothings 12 and 20 engage in one another and the webs 21 slide into the grooves 11, 13. Due to the positive engagement of the webs 21 in the grooves 11, 13, the shaft is fixed in the direction of the axis 2 without the need for further fastening means. The cylinder 6 is now closed with the cylinder heads 31 and the required pneumatic connections are provided.
Bei der Benutzung des Aktuators wird nun beispielsweise der Arbeitsraum 33 mit Druck beaufschlagt, so daß die Kolben 4 und 5 ause andergedrangt werden. In der Darstellung gemäß Figur 2 fuhrt dies zu einer Drehung der Welle 3 gegen den Uhrzeigersinn, wahrend die Arbeitsraume 32 und 34 entlüftet werden. Für eine Drehung der Welle 3 im Uhrzeigersinn werden die Arbeitsraume 32 und 34 mit Druck beaufschlagt, wahrend der Arbeitsraum 33 entlüftet wird. Diese Arbeitsweise ist aus dem Stand der Technik bekannt .When using the actuator, for example, the working space 33 is now pressurized, so that the pistons 4 and 5 are pushed outward. In the illustration according to FIG. 2, this leads to a rotation of the shaft 3 counterclockwise, while the working spaces 32 and 34 are vented. For a rotation of the shaft 3 clockwise, the working spaces 32 and 34 are pressurized, while the working space 33 is vented. This mode of operation is known from the prior art.
Es wird derzeit bevorzugt, daß die Nuten wie diesem Ausfuhrungsbeispiel dargestellt seitlich an die Verzahnung 12 angrenzen und die Kolben 4 und 5 jeweils zwei Stege 21 aufweisen. Dabei soll die äußere Begrenzung der Stege 21 im Betrieb mit den äußeren Wandungen der Nuten 11, 13 gleitend Anlage kommen, wahrend die Stege 21 von der Verzahnung 12 einen geringen Abstand aufweisen. Die axiale Fuhrung der Welle 3 wird dann im Betrieb lediglich von den Flanken der Kolben bewirkt.It is currently preferred that the grooves, as shown in this exemplary embodiment, are on the side Adjacent toothing 12 and the pistons 4 and 5 each have two webs 21. The outer boundary of the webs 21 should come into contact with the outer walls of the grooves 11, 13 during operation, while the webs 21 are at a short distance from the toothing 12. The axial guidance of the shaft 3 is then effected only by the flanks of the pistons during operation.
Als Materialien für einen erf dungsgemaßen Aktuator werden derzeit Aluminium für das Gehäuse 1 und die Welle 3 sowie Kunststoff für die Kolben 4 und 5 bevorzugt. Die Abdichtung im Bereich der Lagerstellen kann durch selbstschmierende Kunststoffe erfolgen. Andere Materialien oder Mateπalpaarungen sind jedoch ebenso denkbar. Die Lagerung selbst ist im Betrieb nur gering beansprucht, da es sich hier um ein Stellglied handelt, wie es für die Betätigung von Ventilen verwendet wird. Aluminum materials for the housing 1 and the shaft 3 and plastic for the pistons 4 and 5 are currently preferred as materials for an actuator according to the invention. Sealing in the area of the bearing points can be done using self-lubricating plastics. However, other materials or material combinations are also conceivable. The bearing itself is only slightly stressed in operation, since it is an actuator as used for the actuation of valves.

Claims

P a te n tan s p rü cheGodfather sayings
Pneumatischer Aktuator mit einem Gehäuse (1), das einen pneumatischen Zylinder (6) umfaßt, mit wenigstens einem in dem Zylinder (6) in Richtung der Achse des Zylinders (6) beweglichen Kolben (4,5), der mit dem Zylinder (6) einen Arbeitsraum (32,33,34) begrenzt, wobei der Kolben (4,5) eine in Richtung der Achse verlaufende Verzahnung (20) tragt, und mit einer um eine Axialrichtung (2) drehbaren Welle (3), deren Axialrichtung (2) senkrecht zu der Achse ausgerichtet ist und die eine Verzahnung (12) tragt, die mit der Verzahnung (20) des Kolbens (4,5) im Eingriff steht, da du r ch ge k e n n z e i chn e t , daß der Kolben (4,5) die Welle (3) in ihrer Axialrichtung Pneumatic actuator with a housing (1), which comprises a pneumatic cylinder (6), with at least one piston (4,5) movable in the cylinder (6) in the direction of the axis of the cylinder (6), which is connected to the cylinder (6 ) delimits a working space (32,33,34), the piston (4,5) carrying a toothing (20) running in the direction of the axis, and with a shaft (3) rotatable about an axial direction (2), the axial direction ( 2) is aligned perpendicular to the axis and which carries a toothing (12) which engages with the toothing (20) of the piston (4,5), since it is indicated that the piston (4, 5) the shaft (3) in its axial direction
(2) formschlussig fixiert .(2) fixed in a form-fitting manner.
Aktuator nach Anspruch 1, da du r c h ge k e n n z e i ch n e t , daß die Welle (3) wenigstens eine in Umfangsrichtung ausgerichtete Nut (11,13) aufweist, die mit einem Achsrichtung verlaufenden Steg (21) des Kolbens (4,5) in Eingriff steht . Actuator according to claim 1, since it is characterized in that the shaft (3) has at least one groove (11, 13) aligned in the circumferential direction, which engages with a web (21) of the piston (4, 5) running in the axial direction stands .
3. Aktuator nach einem der vorhergehenden Ansprüche, da du r c h ge k e nn z e i chn e t , daß die3. Actuator according to one of the preceding claims, since you know that the
Welle (3) zwei Lagerbereiche (10,14) aufweist, die Bereiche des größten Durchmesser der Welle (3) bilden .Shaft (3) has two bearing areas (10,14), which form areas of the largest diameter of the shaft (3).
4. Aktuator nach einem der vorhergehenden Ansprüche, da du r ch ge k e nn z e i chn e t , daß die4. Actuator according to one of the preceding claims, since you know that the
Welle (3) zwei Lagerstellen (22) unmittelbar in dem Gehäuse (1) gelagert ist.Shaft (3) has two bearing points (22) mounted directly in the housing (1).
5. Aktuator nach einem der vorhergehenden Ansprüche, da du r c h ge k e n n z e i ch n e t , daß die5. Actuator according to one of the preceding claims, since you r c h ge k e n n z e i ch n e t that the
Lagerstellen (10, 14) der Welle (3) im wesentlichen den gleichen Durchmesser aufweisen.Bearing points (10, 14) of the shaft (3) have essentially the same diameter.
6. Aktuator nach einem der vorhergehenden Ansprüche, da du r ch ge k e n n z e i chn e t , daß die6. Actuator according to one of the preceding claims, since you know that the
Nut (11,13) eine umlaufend eingestochene Nut ist.Groove (11,13) is a circumferentially pierced groove.
7. Aktuator nach einem der vorhergehenden Ansprüche, da du r ch ge k e n n z e i ch ne t , daß jeder Kolben (4,5) insgesamt zwei der Verzahnung (20) benachbarte Stege (21) aufweist.7. Actuator according to one of the preceding claims, since you know that each piston (4,5) has a total of two webs (21) adjacent to the toothing (20).
8. Aktuator nach einem der vorhergehenden Ansprüche, da du r ch ge k e nn z e i chn e t , daß der8. Actuator according to one of the preceding claims, since you know that the
Kolben (4,5) aus einem Kunststoff gefertigt ist.Piston (4.5) is made of plastic.
9. Aktuator nach einem der vorhergehenden Ansprüche, da du r ch ge k e nn z e i ch n e t , daß der9. Actuator according to one of the preceding claims, since you know that the
Arbeitsraum (33) im Bereich der Lagerstellen (11,14) der Welle (3) mittels in jeweils einer Nut der Welle (3) einliegenden Dichtringen gegenüber dem Außenraum abgedichtet ist. Working space (33) in the area of the bearing points (11, 14) of the shaft (3) is sealed from the outside space by means of sealing rings located in a groove in the shaft (3).
10. Verfahren zur Montage eines Aktuators nach einem der vorhergehenden Ansprüche, d a du r c h ge k e n n z e i c h n e t , daß zunächst die Welle10. Method for assembling an actuator according to one of the preceding claims, so that first the shaft
(3) die Lagerstellen (22) eingeführt wird und danach der oder die Kolben (4,5) in Eingriff mit der Welle (3) gebracht werden.(3) the bearing points (22) are inserted and then the piston or pistons (4,5) are brought into engagement with the shaft (3).
11. Verfahren nach Anspruch 10, dadu r ch ge k e n n z e i c h n e t , daß die Welle (3) ohne weitere Befestigungsmittel m den Lagerstellen (22) gehalten wird. 11. The method according to claim 10, so that the shaft (3) is held in the bearing points (22) without further fastening means.
PCT/EP2000/008191 1999-08-26 2000-08-22 Shaft mounting WO2001014751A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT00958486T ATE242433T1 (en) 1999-08-26 2000-08-22 SHAFT BEARING
DE50002472T DE50002472D1 (en) 1999-08-26 2000-08-22 WAVE STORAGE
EP00958486A EP1212537B1 (en) 1999-08-26 2000-08-22 Shaft mounting
AU69985/00A AU6998500A (en) 1999-08-26 2000-08-22 Shaft mounting

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19940644A DE19940644A1 (en) 1999-08-26 1999-08-26 Shaft bearing
DE19940644.8 1999-08-26

Publications (1)

Publication Number Publication Date
WO2001014751A1 true WO2001014751A1 (en) 2001-03-01

Family

ID=7919777

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/008191 WO2001014751A1 (en) 1999-08-26 2000-08-22 Shaft mounting

Country Status (6)

Country Link
EP (1) EP1212537B1 (en)
AT (1) ATE242433T1 (en)
AU (1) AU6998500A (en)
DE (2) DE19940644A1 (en)
ES (1) ES2195932T3 (en)
WO (1) WO2001014751A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982725A (en) * 1974-06-27 1976-09-28 Keystone International, Inc. Valve actuator
US4167897A (en) * 1975-06-19 1979-09-18 Bunyard Alan D Rotary actuators
US4545288A (en) * 1982-05-25 1985-10-08 Rodyne Limited Quarter turn actuators
EP0344126A1 (en) * 1988-05-24 1989-11-29 Aurelio Messina Improved actuator for actuating valves
US4970944A (en) * 1985-02-07 1990-11-20 Conbraco Industries, Inc. Rotary actuator
DE9014487U1 (en) * 1990-10-19 1991-05-02 Hertlein, Walter, 4050 Moenchengladbach, De
EP0434935A1 (en) * 1989-12-28 1991-07-03 Hoke Incorporated Geared air actuator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL174580C (en) * 1975-10-21 1984-07-02 El O Matic Bv DEVICE FOR A SWIVEL-PROVEN DRIVE.
SE470496B (en) * 1992-10-16 1994-06-06 Ingf Rason Ab Rotary actuators
DE9314410U1 (en) * 1993-09-24 1994-10-13 Revo Antriebstechnik Gmbh Pressure actuated actuator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982725A (en) * 1974-06-27 1976-09-28 Keystone International, Inc. Valve actuator
US4167897A (en) * 1975-06-19 1979-09-18 Bunyard Alan D Rotary actuators
US4545288A (en) * 1982-05-25 1985-10-08 Rodyne Limited Quarter turn actuators
US4970944A (en) * 1985-02-07 1990-11-20 Conbraco Industries, Inc. Rotary actuator
EP0344126A1 (en) * 1988-05-24 1989-11-29 Aurelio Messina Improved actuator for actuating valves
EP0434935A1 (en) * 1989-12-28 1991-07-03 Hoke Incorporated Geared air actuator
DE9014487U1 (en) * 1990-10-19 1991-05-02 Hertlein, Walter, 4050 Moenchengladbach, De

Also Published As

Publication number Publication date
ES2195932T3 (en) 2003-12-16
EP1212537B1 (en) 2003-06-04
DE19940644A1 (en) 2001-03-01
EP1212537A1 (en) 2002-06-12
AU6998500A (en) 2001-03-19
DE50002472D1 (en) 2003-07-10
ATE242433T1 (en) 2003-06-15

Similar Documents

Publication Publication Date Title
DE102007030006B4 (en) vacuum valve
DE60038335T2 (en) jig
DE19950582B9 (en) Actuating device for a rotatable closure part of a valve
DE102011117407A1 (en) Parallel pneumatic gripper
DE102017108030A1 (en) Switching module of an automatic gearbox
DE102006050651B3 (en) Pneumatic five/three-way valve for controlling e.g. pneumatic cylinders, has valve gate arranged in housing, where middle resting position is realized by spring units that are arranged at both sides of valve gate and between spring plates
DE4118030A1 (en) Balanced piston cylinder shock absorber - has by=pass valve with spring valve plate assembly in by=pass channel
EP3561346B1 (en) Seal, sealing arrangement and multiway fluid valve
DE202016003670U1 (en) Connection plate and pneumatic cylinder with integrated connection plate
EP1160113A2 (en) Driving assembly for swingable parts of soft tops
DE1054859B (en) Power transmission device, especially for steering gears with a manual actuation supporting power amplifier, e.g. B. for motor vehicles
DE2821635A1 (en) LIFTING DEVICE
EP0253086A2 (en) Sealing device of two engine parts being in relative mouvement against each other, in particular a piston sealing of a working cylinder
WO2001014751A1 (en) Shaft mounting
DE2925642A1 (en) AXIAL ON THE PISTON ROD OF MOBILE DAMPING PISTON
AT380819B (en) SWIVEL JOINT FOR MANIPULATORS
WO1994026574A1 (en) Sliding vane rotaty valve for assisted steering systems of motor vehicles
EP2495451A1 (en) Fluid-actuated rotary drive
AT407730B (en) Activation arrangement for pivoting parts on vehicles
DE2233304C3 (en) Power-assisted rack and pinion steering for motor vehicles
AT406135B (en) CONNECTING LINK FOR CONNECTING THE RELEVANT VALVES OF THE TWO TIRES OF A TWIN TIRE AND COMPENSATING CAP
DE3544107C2 (en)
DE4215074A1 (en) Piston for rack of servo steering in motor vehicle - with rigid holder between cylinder and rack, with elastic device around rack, for good seal
WO2001056862A1 (en) Servo motor with a working piston, in particular for power-assisted steering gear for motor vehicles
DE102006022505B4 (en) Gap cover on the outside of a motor vehicle

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU IN US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2000958486

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 2000958486

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 10069830

Country of ref document: US

WWG Wipo information: grant in national office

Ref document number: 2000958486

Country of ref document: EP