EP1429037B1 - Vérin fluidique rotatif à trois positions - Google Patents

Vérin fluidique rotatif à trois positions Download PDF

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Publication number
EP1429037B1
EP1429037B1 EP20030024778 EP03024778A EP1429037B1 EP 1429037 B1 EP1429037 B1 EP 1429037B1 EP 20030024778 EP20030024778 EP 20030024778 EP 03024778 A EP03024778 A EP 03024778A EP 1429037 B1 EP1429037 B1 EP 1429037B1
Authority
EP
European Patent Office
Prior art keywords
rotary actuator
housing
driven shaft
piston
relative
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP20030024778
Other languages
German (de)
English (en)
Other versions
EP1429037A1 (fr
Inventor
Herbert Frisch
Manfred Moritz
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.)
Festo SE and Co KG
Original Assignee
Festo SE and Co 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 Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP1429037A1 publication Critical patent/EP1429037A1/fr
Application granted granted Critical
Publication of EP1429037B1 publication Critical patent/EP1429037B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F15B15/12—Characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type
    • F15B15/125—Characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type of the curved-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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
    • F15B11/121—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions
    • F15B11/123—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions by means of actuators with fluid-operated stops
    • 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
    • F15B15/12—Characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type

Definitions

  • the invention relates to a fluid-operated three-position rotary drive, with the possibility of having an output shaft optionally in one of two end positions or one Position intermediate position.
  • Fluid operated rotary actuators with which an output shaft to an oscillating movement between two end positions can be driven, go for example from DE 195 11 488 C2 or from DE 691 13 967 T2.
  • the rotary actuator designed as a rotary piston drive and has a piston pivotable in a housing, which is rotatably connected to an output shaft.
  • By Fluid loading of the rotary piston this becomes a Pivoting motion driven, from the a tappable rotary motion the output shaft results.
  • the functional principle in the Case of DE 691 13 967 T2 is similar, where there is the rotary drive However, designed as an annular piston drive, with a ring-like plunger designed in a complementary housing is adjustable.
  • variable adjustable limit stops different end positions Specify output shaft. In both cases, on the other hand no way the output shaft when needed in a lying between the two end positions intermediate position to position.
  • Such positioning offers indeed in the DE 41 24 273 A1 described rotary drive. More precisely, it acts it is there a four-position rotary actuator, the allows two end positions and two intermediate positions.
  • the rotary actuator contains two rotary drive units whose housing are firmly connected, the resulting Housing unit is adjustable relative to a piston and wherein the other piston in turn relative to the housing unit is rotatable. Through coordinated activation can thus the output shaft in a total of four positions be positioned.
  • one Positioning in three positions is sufficient Building for such cases too complex and too expensive to be profitable to be.
  • the object of the present invention to provide a To create a fluid-operated rotary drive, the cost-effective and compact design offers the possibility of the output shaft to position in a total of three positions.
  • the three-position rotary drive has two rotary drive units, operated in a coordinated manner can be used to select the output shaft in either one of to position three possible positions.
  • the second rotary drive unit in the unpressurized freewheeling state can the output shaft by operating only the first Rotary drive unit rotated between the two end positions and positioned in each of the two end positions.
  • the second rotary drive unit is functionless, wherein by the freewheeling property obstructing the movement the output shaft is excluded. That with the output shaft mitbewegte coupling member is easily in the Location due to the non-pressurized state of the second rotary drive unit to move unfixed driver.
  • the second rotary drive unit is in the positioning state offset, which has the consequence that the two drivers approach each other until they reach the one between them Intermediate stop from opposite sides comparable apply a pliers. In this pliers closing movement this will also be between the two drivers protruding coupling member taken and thus the Driven output shaft in the intermediate position.
  • the first rotary drive unit in turn put in a depressurized freewheeling state, so that the resistance caused by the coupler to be towed is low.
  • the adjustable By means of an intermediate position stop, the adjustable is and is stationary in different positions fix the first housing, the position of the Intermediate position can be varied.
  • You can, for example, a Specify center position, which is angularly exactly between the two end positions is.
  • any other rotational position can be specified, which is realized both continuously or in a graduated manner can be.
  • the Three-position rotary drive expediently with a suitable Control circuit equipped, in particular at least includes a valve device.
  • one or both end positions can be variable be predeterminable.
  • the fluid-operated unit designated in its entirety by reference numeral 1
  • Three-position rotary drive is particularly suitable for operation with compressed air, albeit a hydraulic one Pressure medium used to provide the driving force can be.
  • the rotary drive 1 contains two combined first and second rotary drive units 2, 3, which are at Actually known drive types can act.
  • the first rotary drive unit 2 as a rotary piston drive 2a
  • the second rotary drive unit 3 as a so-called annular piston drive 3a form.
  • the other Description of the embodiment done although be noted that it is the two Rotary drive units 2, 3 readily by the same Drive type or other than the mentioned drive types can act.
  • the first rotary drive unit 2 includes a first housing 4, in which a first housing interior 5 is located, at least partially has a circular outline.
  • first piston 7 is rotatably connected.
  • This here formed as a rotary piston or swing wing first piston 7 divides the first housing interior 5 into two working chambers 8, 9, in each case a the wall of the first housing 4 passing fluid channel 12, 13 leads over which the fed during operation fluidic pressure medium or is dissipated.
  • a first valve device 15 connected, which in particular is electromagnetically activated (Figure 7). Is at a feed port 16 of the first valve device 15 pressure medium, can by appropriate Control of the first valve device 15 in the respective a working chamber supplied pressure medium and from each other working chamber pressure medium are discharged. This leads to a direction indicated by a double arrow pivoting movement 17 of the first piston 7, which is a simultaneous, again indicated by a double arrow rotational movement 18th the output shaft 6 has the consequence.
  • the axis of rotation is referred to as the central axis 22 and coincides with the longitudinal axis the output shaft 6 together.
  • first rotary drive unit 2 By the operation of the first rotary drive unit 2 leaves to position the output shaft 6 either in two end positions. These end positions are in the embodiment by two lying in the pivoting path of the first piston 7 fixed to the housing end stops 24 given the pivoting limit the first piston 7. In the embodiment are the end stops 24 directly from the end walls of the two working chambers 8, 9 formed. It may, however, be also act on separate slings.
  • variable end positions of the output shaft one or both end stops 24 relative to the first Housing 4 be designed adjustable. There are, too Agent present, which is a fixed fixing the end stops 24 in the set position.
  • Adjustable end stops are dash-dotted in Figure 2 at 24 'indicated. Deviating from the presentation, these can End stops also outside the working chambers 8, 9 effective be, for example, have a structure as in the DE 19511488 C2 is described.
  • the second rotary drive unit 3 is located on the second Axialseite 26 of the first housing 4 and sits there, with respect the central axis 22 freely rotatable on the output shaft 6th
  • the second rotary drive unit 3 has over a second housing 27, which has the shape of a longitudinal section has a torus.
  • the radius of curvature lies on the central axis 22.
  • a first bearing part 28 which is the output shaft 6 concentrically surrounds, the second housing 27 is on the output shaft 6 rotatably mounted.
  • the second housing 27 defines a second housing interior 32, which follows the shape of the torus section and the closed at one end and open at the other end.
  • the first bearing part 28 engages in particular in the area of the closed End on. Dive through the open end a designed according to the length of a ring ring plunger-like second piston 33 in the second housing space 32 and thus defines a curved working chamber 34, whose length depends on how far the second piston 33 in the second housing interior 32 dips.
  • the second piston 33 At its rear end, opposite to that in the second housing 27 engaging end, is the second piston 33 via a second bearing part 35 also on the output shaft 6, relative to this rotatable, stored.
  • the first bearing part 28 also has the second bearing part 35 via a coaxial to the output shaft 6 annular bearing portion 36th
  • the second housing 27 and the second piston 33 are relative to each other about the central axis 22 rotatable. In addition, you can independently of each other, again about the central axis 22, relative to the first housing 4 of the first rotary drive unit 2 to be twisted.
  • a fluid channel 37 which via a fluid line 38th is connected to a second valve device 42. Also this is expediently electrically activated. she can be spent in two switch positions, where in an off Figure 7 resulting first switching position a pressure source P is connected through, so that the working chamber 34 with Pressure medium is applied. In a second switching position the working chamber 34 is depressurized.
  • first and second driver 43a, 43b On the second housing 27 and the second piston 33 is respectively a first and second driver 43a, 43b provided, the the rotational movement of the respective component participates.
  • the drivers 43a, 43b for example, in unit with the two bearing parts 28, 35 are executed.
  • the two Carrier 43a, 43b At the in the Direction of rotation facing each other have the two Carrier 43a, 43b each have a driver surface 44a, 44b.
  • Coupled to the output shaft 6 Coupling member 45 into it. It can be one integral part of the output shaft 6 act, wherein but for the sake of easier manufacture and assembly a separate embodiment comparable to the embodiment is preferred.
  • the coupling member 45 with a fastening part 46 axially between the output shaft 6 and the second Rotary drive unit 3 is turned on, wherein the pivot bearing of the second housing 27 and the second piston 33 at the fastening part 46, which in turn rotatably on the output shaft 6 is fixed.
  • the coupling member 45 may be angled in an L-shape. Becomes the output shaft 6 through the first rotary drive 2 to a Driven rotary motion, performs the motion coupled coupling member 45 a corresponding, indicated by double arrow Pivoting movement 47 about the central axis 22 from. In reverse Way leads exerted on the coupling member 45 Torque that the coupling member 45 is pivoted and Thus, the associated output shaft 6 is rotated.
  • the rotary drive 1 further has an intermediate position stop 48, which like the coupling member 45 between the two drivers 43a, 43b protrudes. He is re fixed to the first housing 4 fixed.
  • the intermediate position stop 48 with an annular storage section 52 freely rotatable on the output shaft 6 and contains a fixedly connected to the storage section 52, radially protruding, angled stop arm 53, in the adjustment the two drivers 43a, 43b protrudes.
  • fastening means 54 is the stop arm 53 so attached to the first housing 4, that he respect this are not twisted about the central axis 22 can.
  • the intermediate position stop 48 takes a certain intermediate position default position, depending on Embodiment of the rotary drive a fixed default position or a variable default position.
  • a variability by the Intermediate stop 48 with dissolved fasteners 54 according to double arrow 55 relative to the first housing 4 to the Central axis 22 is rotatable and gradually in different Default positions fixed relative to the first Housing 44 can fix, with such default positions exemplary indicated by dots at 56.
  • the second rotary drive unit by appropriate actuation of the second valve device 42 depressurized, so that they have a freewheeling state in which without obstruction by trapped Compressed air a relative rotation between the second housing 27 and the second piston 33 is possible.
  • the output shaft 6 performs a rotational movement, wherein the co-moving coupling member 45 on the upstream in the direction of rotation Driver 43a and 43b acts and this before to move around.
  • the co-moving coupling member 45 on the upstream in the direction of rotation Driver 43a and 43b acts and this before to move around.
  • the output shaft 6 becomes the first driver connected to the second housing 27 43a (FIG. 6) or that connected to the second piston 33 second driver 43b ( Figure 5) acted upon. Since the each not acted upon by the coupling member 45 driver is supported on the stationary intermediate position stop 48 can in this movement, the second piston 33 in the second housing 27 dive.
  • the second rotary drive unit 3 fed with pressure medium, so that they are in one Positioning state goes.
  • the coupling member 45 becomes one Driver and pushed in front of him, in whose travel currently stands out.
  • the rotational movement of the coupling member 45 ends when both drivers 43a, 43b with their facing driver surfaces 44a, 44b of opposite Sides sides abut the intermediate position stop 48 and at the same time the coupling member 45 between them hold.
  • a big advantage of the rotary drive is that each the three positions as part of a continuous movement approached from any previously taken position can be without a prior mechanical unlocking any components needed and without that a stopover of the movement would be required.
  • the two valve devices 15, 42 are expediently Part of a total denoted by reference numeral 58 Control circuit, to the expediently even one not shown sensors and an electronic Control device belongs to the movements exactly to each other to be able to vote.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Actuator (AREA)

Claims (9)

  1. Entraínement en rotation à trois positions, actionné par un fluide,
    comportant une première unité d'entraínement en rotation (2) qui comporte un premier boítier (4), un premier piston (7) pouvant tourner par rapport au premier boítier (4) et un arbre de sortie (6) relié solidairement en rotation au premier piston (7), l'arbre de sortie (6) pouvant être entraíné par action du fluide sur le premier piston (7) en un mouvement de rotation oscillant autour d'un axe central (22), entre deux positions terminales,
    comportant un organe d'accouplement (45) relié à l'arbre de sortie (6), décrivant un mouvement de pivotement par rapport à l'axe central (22), lors du mouvement de rotation de l'arbre de sortie (6),
    comportant une deuxième unité d'entraínement en rotation (3) coaxiale à la première unité d'entraínement en rotation (2), qui comporte un deuxième boítier (27) et un deuxième piston (33) définissant avec celui-ci une chambre de travail (34), lesquels peuvent tourner l'un par rapport à l'autre et par rapport au premier boítier (4) autour de l'axe central (22), et qui comportent chacun un entraíneur (43a, 43b) décrivant un mouvement de pivotement par rapport à l'axe central (22), lors du mouvement de rotation,
    comportant une butée de position intermédiaire (48) fixe par rapport au premier boítier (4) qui, comme l'organe d'accouplement (45), s'étend entre les deux entraíneurs (43a, 43b),
    et comportant des moyens d'action de la pression sur la chambre de travail (34), ce qui fait que la deuxième unité d'entraínement en rotation (3) peut commuter au choix dans un état de roue libre, hors pression, permettant la libre mobilité en pivotement des entraíneurs (43a, 43b) et donc la libre possibilité de rotation de l'arbre de sortie (6) entre les deux positions terminales, ou dans un état de positionnement soumis à la pression, dans lequel les entraíneurs (43a, 43b) s'approchent l'un de l'autre à la manière d'une pince jusqu'à venir s'appliquer contre la butée de position intermédiaire (48), l'arbre de sortie (6), relié à l'organe d'accouplement (45), étant tourné, par entraínement de l'organe d'accouplement (45), dans une position intermédiaire située entre les deux positions terminales.
  2. Entraínement en rotation selon la revendication 1, caractérisé en ce qu'au moins une unité d'entraínement en rotation (2) est réalisée en tant qu'entraínement à piston pivotant (2a).
  3. Entraínement en rotation selon la revendication 1 ou 2, caractérisé en ce qu'au moins une unité d'entraínement en rotation (3) est réalisée en tant qu'entraínement à piston annulaire (3a).
  4. Entraínement en rotation selon l'une des revendications 1 à 3, caractérisé en ce que la butée de position intermédiaire (48) peut être réglée et fixée dans différentes positions, de façon fixe par rapport au premier boítier (4).
  5. Entraínement en rotation selon la revendication 4, caractérisé en ce que la butée de position intermédiaire (48) est montée de manière à pouvoir tourner librement sur l'arbre de sortie (6) et comporte un bras de butée (53) partant de celui-ci, qui peut être fixé de façon séparable par rapport au premier boítier (4).
  6. Entraínement en rotation selon l'une des revendications 1 à 5, caractérisé en ce que le deuxième boítier (27) comme le deuxième piston (33) sont montés sur l'arbre de sortie (6), de façon à pouvoir tourner librement.
  7. Entraínement en rotation selon l'une des revendications 1 à 6, caractérisé par un circuit de commande (58) par lequel la deuxième unité d'entraínement en rotation (3) peut être placée au choix dans l'état de roue libre ou dans l'état de positionnement, et par lequel la première unité d'entraínement en rotation (2) peut commuter, pendant l'état de positionnement de la deuxième unité d'entraínement en rotation (3), de son côté, dans un état de roue libre, hors pression, garantissant la libre mobilité de l'arbre de sortie (6).
  8. Entraínement en rotation selon la revendication 7, caractérisé en ce que le circuit de commande (58) contient au moins un dispositif à soupape (15, 42).
  9. Entraínement en rotation selon l'une des revendications 1 à 8, caractérisé en ce que pour sélectionner des positions terminales variables de l'arbre de sortie (6), il est prévu au moins une butée terminale (24, 24') réglable et pouvant être fixée dans différentes positions, de façon fixe, par rapport au premier boítier (4).
EP20030024778 2002-12-13 2003-10-30 Vérin fluidique rotatif à trois positions Expired - Fee Related EP1429037B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20219367U DE20219367U1 (de) 2002-12-13 2002-12-13 Fluidbetätigter Dreistellungs-Drehantrieb
DE20219367U 2002-12-13

Publications (2)

Publication Number Publication Date
EP1429037A1 EP1429037A1 (fr) 2004-06-16
EP1429037B1 true EP1429037B1 (fr) 2005-11-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030024778 Expired - Fee Related EP1429037B1 (fr) 2002-12-13 2003-10-30 Vérin fluidique rotatif à trois positions

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EP (1) EP1429037B1 (fr)
DE (2) DE20219367U1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1896730B1 (fr) * 2005-06-30 2013-04-10 James Antony Kells Actionneur de piston hydraulique toroïdal
US9816537B2 (en) 2013-02-27 2017-11-14 Woodward, Inc. Rotary piston type actuator with a central actuation assembly
US9234535B2 (en) 2013-02-27 2016-01-12 Woodward, Inc. Rotary piston type actuator
US9631645B2 (en) 2013-02-27 2017-04-25 Woodward, Inc. Rotary piston actuator anti-rotation configurations
CN107002722B (zh) * 2014-09-19 2019-09-10 伍德沃德有限公司 旋转活塞促动器防旋转构造
US11199248B2 (en) 2019-04-30 2021-12-14 Woodward, Inc. Compact linear to rotary actuator
CN115667734A (zh) 2020-04-08 2023-01-31 伍德沃德有限公司 带有中心致动组件的旋转活塞型致动器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE871557C (de) * 1945-08-24 1953-03-23 Von Roll Ag Gelenklose, hydraulische Ringkolben-Antriebseinrichtung
US2974645A (en) * 1957-10-15 1961-03-14 Allmama Svenska Elek Ska Aktie Hydraulic servo-motors
JPH034004A (ja) * 1989-05-31 1991-01-10 Akashi Seisakusho Co Ltd ロータリアクチュエータ
JPH0739572Y2 (ja) * 1990-07-31 1995-09-13 黒田精工株式会社 多段開度チャック装置

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Publication number Publication date
DE20219367U1 (de) 2003-02-13
DE50301729D1 (de) 2005-12-29
EP1429037A1 (fr) 2004-06-16

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