EP0449803A1 - Entraînement pivotant - Google Patents

Entraînement pivotant Download PDF

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Publication number
EP0449803A1
EP0449803A1 EP91890058A EP91890058A EP0449803A1 EP 0449803 A1 EP0449803 A1 EP 0449803A1 EP 91890058 A EP91890058 A EP 91890058A EP 91890058 A EP91890058 A EP 91890058A EP 0449803 A1 EP0449803 A1 EP 0449803A1
Authority
EP
European Patent Office
Prior art keywords
stop
piston
pinion
drive
end positions
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.)
Withdrawn
Application number
EP91890058A
Other languages
German (de)
English (en)
Inventor
Erich Vörös
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.)
Hoerbiger Fluidtechnik KG
Original Assignee
Hoerbiger Fluidtechnik KG
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 Hoerbiger Fluidtechnik KG filed Critical Hoerbiger Fluidtechnik KG
Publication of EP0449803A1 publication Critical patent/EP0449803A1/fr
Withdrawn legal-status Critical Current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
    • F15B15/02—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 invention relates to a swivel drive, in particular for pneumatic actuation, with at least one drive piston acting on a pinion via a toothed rack and which can be adjusted between two end positions relative to its cylinder when pressure is applied.
  • Such swivel drives work with limited angles of rotation and generate the swivel movement from the linear piston movement via the rack and pinion gear.
  • hydraulic swivel drives of the type mentioned can also move and hold intermediate positions relatively securely and also under load with a good seal, there is a serious disadvantage, particularly for pneumatic drives of this type, that only the two end positions can be really clamped securely and without play.
  • the object of the present invention is to design a swivel drive of the type mentioned, in particular for pneumatic actuation, in such a way that intermediate positions can be approached in any order in a simple manner and also in normal operation without modification of the arrangement, and with a small angular tolerance even under Are durable.
  • a stop element provided with a further toothed rack also engages with the pinion and in that at least one adjustable in a stop cylinder when pressure is applied between two end positions Stop piston is provided which limits the movement of the stop element at least in one of its end positions.
  • the stop positions of the pinion are thus decoupled from the actual end positions of the drive piston in its cylinder. If the stop pistons are in their one end position outside the range of movement of the stop element, the end positions of the drive pistons also form the end positions of the swivel drive.
  • the respective position of the stop pistons also determines the position of the swivel drive. It is particularly advantageous that the pressurized drive piston tightly clamps the pinion against the stop piston via the two racks, so that any backlash between the racks and the pinion is also eliminated. In this way, intermediate positions are possible in each swivel direction, in which the swivel drive is kept clamped largely free of play and with a small angular tolerance. It is irrelevant in what order and from which direction the possible positions are approached. All positions can be approached in any order simply by pressurizing the corresponding connections.
  • the stop piston has a larger cross section than the drive piston with the same pressurization.
  • the stop piston can thus be held securely in position without the need for a separate, higher pressurization of the same or another lock.
  • a separate drive piston for the reciprocating movement of the pinion is provided in a separate cylinder and the stop element for the back and forth movement cooperates with a stop piston which is separately adjustable in its stop cylinder.
  • two drive pistons are connected to the one toothed rack, which are arranged essentially parallel to the stop element with the further toothed rack interacting with two stop pistons and in a common housing opposite this with respect to the pinion.
  • the pinion or its bearing is loaded symmetrically or centrally, which is favorable for installation and operation.
  • the most important advantage is that the swivel drive is fully tensioned in every position, since the power transmission from the racks to the pinion takes place in opposite directions, so that any backlash that may exist between the racks and the pinion cannot be effective.
  • the part-turn actuator always takes exactly the same position and is securely clamped in it, regardless of the direction from which the position is approached.
  • the drive pistons for the back and forth movement of the pinion have separate racks which are essentially parallel with respect to the pinion and which cooperate with the stop pistons opposite the drive pistons and each serve simultaneously as a stop element for the movement of the pinion caused by the other rack.
  • the two swivel directions are thus covered by arrangements opposite one another with respect to the pinion; both in terms of actuation via the drive piston and in terms of limiting the movement via the stop piston.
  • At least one further stop piston is provided according to a preferred further embodiment of the invention, which can be adjusted between two end positions when pressure is applied and in one of its end positions the movement of one directly with a stop element interacting stop piston limited.
  • one of the stop pistons acting directly on the stop element can either be adjusted directly between its end positions determined by the interaction with the associated cylinder, or indirectly between the positions determined by the further stop piston and its interaction with its cylinder. This results in an intermediate position for each of the stop pistons acting directly on the stop element, so that two intermediate positions are added to the swivel drive for each direction of movement. It is It is easy to see that any number of additional intermediate positions could be realized within wide limits by connecting further such stop pistons in series, to which all applies that the position of the swivel drive thereby achieved can be kept clamped practically without play.
  • the position of at least one of the end positions of at least one stop piston can be adjustable relative to the stop element in a further embodiment of the invention, e.g. by means of adjustment stops that can be screwed into the stop piston on its end faces.
  • adjustable stops can also be provided on the stop element or in the stop cylinder. This gives you the opportunity to fine-tune certain, precisely defined angular positions.
  • throttle points are arranged in the supply and / or discharge of the pressure medium of at least some of the cylinders, making it possible to carry out the different movements between the individual positions even at different speeds.
  • FIG. 1 shows a schematic section through a swivel drive designed according to the invention
  • FIG. 2 shows a section corresponding to FIG. 1 through another exemplary embodiment
  • FIG. 3 shows a partial section through a functionally according to the embodiment 1 corresponding other exemplary embodiment
  • FIG. 4 a further exemplary embodiment of the invention with additional stop pistons for further intermediate positions
  • FIG. 5 a further exemplary embodiment corresponding to the function of the embodiment according to FIG. 4 in section.
  • the housing 1 is housed in a housing 1, which here - as in FIGS. 2, 4, 5 is only indicated schematically and has connections A, B, C, D for supplying pressure medium, in particular compressed air.
  • the housing 1 contains in the lower area 2 via a rack 2 on a pinion 3 acting drive pistons 4, 5, which are pressurized via the ports A, B relative to their cylinders 6, 7 between two design end positions and thus in the same way cause the pinion 3 to pivot between two end positions.
  • a stop element 9 provided with a further toothed rack 8 likewise engages with the pinion 3 and is thus taken along when the latter is pivoted in opposition to the movement of the toothed rack 2.
  • stop pistons 12, 13 are arranged which, in contrast to the drive pistons 4, 5, are not connected to the rack 8 lying between them and, when pressure is applied via the connections C, D, between their two by the stop cylinders 10, 11 certain end positions are adjustable.
  • the stop piston 12 like the stop piston 13 in its outer, unpressurized end position and in this does not limit the movement of the stop element 9, so that here the pivoting movement is practically limited in cooperation with the drive pistons 4, 5 with their cylinders 6, 7. If pressure medium is supplied at port C, the stop piston 12 moves into its right-hand end position and limits the swing movement of the pinion 3 on one side. The same can be achieved on the other side by adjusting the stop piston 13 into its left-hand end position.
  • Fig. 2 differs from Fig. 1 only in that here the drive pistons 4, 5 for the back and forth movement of the pinion 3 separate, with respect to the pinion 3 substantially parallel racks 2, 8, which with the Drive pistons 4, 5 opposite stop pistons 12, 13 cooperate and serve each other simultaneously as stop element for the movement of the pinion 3 caused by the other rack. It is also provided here that the toothed racks 2, 8 on the side of the drive pistons 4, 5 are firmly connected to them, whereas on the opposite side they are not connected to the stop pistons 12, 13 and only cooperate on a case-by-case basis. With regard to the arrangement or pressurization of the connections A to D, there are completely identical functions to the embodiment according to FIG. 1, so that the description of the mode of operation is not repeated.
  • the position of the end positions of the stop piston 12 is adjustable relative to the stop element 9.
  • adjustment stops 14, 15 can be screwed into threaded recesses 16, 17 of the stop piston 12 and can be adjusted by turning such that the desired angles are achieved very precisely.
  • the outer adjustment stop 15 is designed so that it projects over the edge of the stop piston 12, with which the respective end stop can be adjusted.
  • the inner adjustment stop 14 is set back in the stop piston 12, so that the stop position of the stop element 9 can thus be adjusted.
  • FIGS. 3 also refer to seals 16 and 17 and to the housing cover 18.
  • two further stop pistons 19, 20 are provided which, when pressurized via separate ports E, F, in turn between two end positions (due to their cylinders 21 , 22) are adjustable and each in their limit the movement of the associated stop pistons 12, 13 which interact directly with the stop element 9 in the inner end position.
  • the piston rods 23 must be free of the pistons at least on one side.
  • the stop piston 12 can be actuated either directly via its connection C or indirectly via the connection E and the further stop piston 19, which leads to outer end positions of this stop piston 12 which are dependent on the design, and which thus result in certain intermediate positions of the pivoting of the pinion 3 result.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
EP91890058A 1990-03-28 1991-03-25 Entraînement pivotant Withdrawn EP0449803A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT715/90 1990-03-28
AT71590 1990-03-28

Publications (1)

Publication Number Publication Date
EP0449803A1 true EP0449803A1 (fr) 1991-10-02

Family

ID=3497901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91890058A Withdrawn EP0449803A1 (fr) 1990-03-28 1991-03-25 Entraînement pivotant

Country Status (1)

Country Link
EP (1) EP0449803A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0663261A1 (fr) * 1993-12-17 1995-07-19 Montech AG Entraînement pour actionner un arbre de pignon
DE4428302A1 (de) * 1994-08-10 1996-02-15 Marseille Georg Pneumatisch betätigbares Drehmodul
DE19803819A1 (de) * 1998-01-31 1999-08-12 Festo Ag & Co Fluidbetätigte Drehantriebsvorrichtung
DE202014104693U1 (de) 2014-09-30 2015-10-06 Willig Fahrzeugbau Gmbh Öffnungs- und Schließmechanismus für eine Klappenanordnung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1053778A (fr) *
GB933424A (en) * 1961-12-14 1963-08-08 Mathews Engineering Company Lt Improvements in or relating to rotary fluid pressure actuators
WO1984003128A1 (fr) * 1983-02-11 1984-08-16 Wm Regler Ab Dispositif d'actionnement a fluide pour le reglage pas-a-pas de vannes
FR2555675A1 (fr) * 1983-11-25 1985-05-31 Vernet Henri Dispositif et procede pour la commande a distance d'appareillages comportant un arbre entraine en rotation ou en translation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1053778A (fr) *
GB933424A (en) * 1961-12-14 1963-08-08 Mathews Engineering Company Lt Improvements in or relating to rotary fluid pressure actuators
WO1984003128A1 (fr) * 1983-02-11 1984-08-16 Wm Regler Ab Dispositif d'actionnement a fluide pour le reglage pas-a-pas de vannes
FR2555675A1 (fr) * 1983-11-25 1985-05-31 Vernet Henri Dispositif et procede pour la commande a distance d'appareillages comportant un arbre entraine en rotation ou en translation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0663261A1 (fr) * 1993-12-17 1995-07-19 Montech AG Entraînement pour actionner un arbre de pignon
DE4428302A1 (de) * 1994-08-10 1996-02-15 Marseille Georg Pneumatisch betätigbares Drehmodul
DE19803819A1 (de) * 1998-01-31 1999-08-12 Festo Ag & Co Fluidbetätigte Drehantriebsvorrichtung
US6170384B1 (en) 1998-01-31 2001-01-09 Festo Ag & Co. Fluid power rotary drive device
DE19803819B4 (de) * 1998-01-31 2004-05-13 Festo Ag & Co Fluidbetätigte Drehantriebsvorrichtung
DE202014104693U1 (de) 2014-09-30 2015-10-06 Willig Fahrzeugbau Gmbh Öffnungs- und Schließmechanismus für eine Klappenanordnung

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