EP0717199B1 - Vérin de travail du type plat - Google Patents

Vérin de travail du type plat Download PDF

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Publication number
EP0717199B1
EP0717199B1 EP95115590A EP95115590A EP0717199B1 EP 0717199 B1 EP0717199 B1 EP 0717199B1 EP 95115590 A EP95115590 A EP 95115590A EP 95115590 A EP95115590 A EP 95115590A EP 0717199 B1 EP0717199 B1 EP 0717199B1
Authority
EP
European Patent Office
Prior art keywords
chamber
working cylinder
cylinder according
piston
divider element
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 - Lifetime
Application number
EP95115590A
Other languages
German (de)
English (en)
Other versions
EP0717199A1 (fr
Inventor
Kurt Dr. Stoll
Georg Heid
Klaus Zoller
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 EP0717199A1 publication Critical patent/EP0717199A1/fr
Application granted granted Critical
Publication of EP0717199B1 publication Critical patent/EP0717199B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1414—Characterised by the construction of the motor unit of the straight-cylinder type with non-rotatable piston
    • F15B15/1419—Characterised by the construction of the motor unit of the straight-cylinder type with non-rotatable piston of non-circular cross-section
    • 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
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1457—Piston rods

Definitions

  • the invention relates to a working cylinder in a flat design, with an outside one at least essentially having a rectangular cross-sectional contour Cylinder housing, which is also at least one in essentially rectangular cross-sectional contour Recording space limited, in which a complementary contoured, axially movable piston is arranged, the with one on an open front face of the housing outstanding output rod is connected, whose length section located within the receiving space is contoured complementary to the receiving space and axially movable from the peripheral wall of the receiving space is performed, the opposite on the output rod Longitudinal section lying on the axial side of the piston of the recording space forms a first work space that with a connection opening for the supply and / or discharge of a communicates fluidic pressure medium.
  • EZH distributed working cylinders are characterized by their particularly flat design from the rectangular-like Contouring the cylinder housing, the piston and the output rod results.
  • this working cylinder are linear guide function and pneumatic drive function compactly combined. Due to the non-rotating The working cylinder can be used in many applications be used where high accuracy is required.
  • the extension stroke is the Output rod through the one supplied to the first work area caused fluidic fluid, which it expediently is compressed air.
  • fluidic fluid which it expediently is compressed air.
  • Will be the first Vented work space ensures that one acting on the piston mechanical spring arrangement for resetting in the starting position.
  • spring arrangement is limited from conceptual Establish the maximum possible stroke and leads to a certain length of the Working cylinder.
  • the restoring force is not variable, as it is fixed by the spring arrangement.
  • the piston and the output rod with an axial distance from each other arranged and via an intermediate connecting rod are motion-coupled, their cross-section is smaller is that of the piston and the guided longitudinal section the output rod that inside the receiving space, with an axial distance to the open front of the housing, where the output rod protrudes Room divider element is sealed, which is is located axially between the piston and the output rod and sealed axially penetrated by the connecting rod is, and that the space divider between the Piston and the open face of the housing Longitudinal section of the receiving space axially in one on the second working space located on the side facing the piston and one facing the open housing end face Subdivision leadership room, with the second work space with a connection opening for the supply and / or discharge of fluid
  • the pressure medium communicates and the leadership space within of the receiving space lying length section of the output rod records.
  • the space divider element expediently serves as a stroke limiting element for that from the piston, the connecting rod and the output rod existing, together movable unit. Depending on the stroke direction, preferably runs either the piston or the output rod at the stroke end on the room divider element, which is therefore a stop function Has.
  • the relevant end faces of the room divider element with a Be buffered preferably form the front end parts of the room divider element itself relevant buffer by the space divider expediently is designed as a plastic part overall, which has a certain elastic compliance.
  • the space divider element forms a combined stop and seal part, preferably made of elastomer material. In this case it seals the second workspace towards the lead room by using the peripheral wall of the receiving space and with the outer circumference the connecting rod is in sealing contact.
  • the supply and discharge of the print medium in and out of second work space is advantageously carried out via a in the space dividing fluid channel that in particular opens at the front and at least partially formed by a particularly annular longitudinal gap can be, which surrounds the connecting rod.
  • the cylinder housing can be made of metal, for example made of aluminum material.
  • the working cylinder shown in Fig. 1 to 3 has about a particularly flat design by making it overall has a cuboid-like outer shape, the rectangular cross section is chosen so that it has a comparison has a large long side to the narrow side, the extent of which in the exemplary embodiment at least twice big as that of the narrow side. It is because of it possible to pack several of these cylinders with to put their long sides together, the Center-to-center distance of cylinders in comparison to round-piston cylinders with the same piston area reduced about 40%.
  • the working cylinder has a cylinder housing 1, the outside is a rectangular cross-sectional contour with rounded corners. It has one Circumferential wall 2, which the radial limitation of one in the Cylinder housing 1 formed receiving space 3 forms. At the one, in Fig. 1 left end is this recording space 3 by a preferably in one piece with the peripheral wall 2 connected end wall 4 closed. This carries a mounting eye 5 for fixing the working cylinder on a component, not shown.
  • the cylinder housing 1 is open. Said end is referred to as the open housing end face 6.
  • the receiving space 3 has over its entire axial length, starting from the end wall 4 to its opening 7 on the open housing end 6, one continuously constant cross-sectional contour. At least this is the case here held substantially rectangular by two longer straight longitudinal sides 8, 8 'at a distance are parallel and the two narrow sides 9, 9 ' in particular are rounded off in a semicircle. Both Please note that the working cylinder in in practice can have a very small size, the longitudinal dimensions of the cross section e.g. 6.5 mm and the transverse dimensions e.g. 1.5 mm.
  • a complementary contoured, axially movable piston 15 added in the cylinder space 13 is a complementary contoured, axially movable piston 15 added. This sits firmly on a connecting rod 16, which is coaxial extends to the receiving space 3 and a central, axial continuous opening 17 of the room divider element 12 enforced. Your protruding into the guide room 14 outer end 18 is at one in the embodiment plate-shaped output rod 22 set that is axially displaceably mounted in the guide space 14 and with an operating section 23 at the opening 7 protrudes beyond the cylinder housing 1. On the operating section 23 can be moved, not shown Define component.
  • the cylinder housing 1 expediently Metal, for example made of aluminum material, is the exemplary output rod 22 is a plastic part.
  • Position (Fig. 1) is the output rod 22 with your inner end at the facing end portion 24 of the room divider element 12.
  • the whole inside of the guide space 14 lying length section of the output rod 22 has a complementary to the guide space 14 Cross-sectional contour. This expediently extends over the entire length of the output rod 22.
  • the output rod 22 and the connecting rod 16 could be formed in one piece in principle.
  • the connecting rod 16 by means of a connecting device 25 on the Output rod 22 is fixed.
  • 1 has the Output rod 22 on the room divider element 12 facing End face via a blind hole-like recess 26, in which the connecting rod with its outer end 18th protrudes.
  • a connecting device 25 transverse pin or bolt 25 ' is provided which the end 18 penetrates and ends in two opposite Boundary walls of the recess 26 on the Output rod 22 is set.
  • connection is preferably such that with respect to the Longitudinal axis of the bolt 25 'a degree of freedom between the output rod 22 and the connecting rod 16 are present, so that no tension can occur.
  • the connecting rod is 16 1 to 3 a flat component, which is a substantially rectangular cross-sectional contour has, with the narrow edges rounded are.
  • the main axes of all previously mentioned Rectangular components collapse.
  • the piston 15 of the embodiment sits on the End wall 4 facing inner end 27 of the connecting rod 16.
  • the piston 15 can be a plastic part be that directly by injection molding on the Connecting rod 16 is molded so that there are additional There is no need for fastening devices.
  • the outer circumference of the piston 15 carries a circumferential Sealing ring 28, which is conveniently in a Circumferential groove of the piston 15 is held and inside on the Circumferential wall 2 of the cylinder housing 1 bears sealingly.
  • the piston 15, the connecting rod 16 and the driven part 22 form an at least axially fixed to each other connected unit, which is axially related to each other Can move cylinder housing 1.
  • the piston 15 divides the cylinder space 13 into one first and a second working space 32, 33.
  • the front Limitation of the first working space 32 forms the End wall 4, that of the second work room 33 forms the room divider element 12.
  • Each work space 32, 33 communicates with its own connection opening 34, 35, via compressed air or another fluid pressure medium can be added or removed as required.
  • the resulting pressurization of the piston 15 results in an axial movement of the same, whichever Stroke an extension or a retraction the output rod 22 with reference to the guide space 14 evokes.
  • the extension stroke of the output rod 22 is through the space divider element 12 limited. This forms a stroke limit stop for the piston 15, which at the end of its extension movement on the assigned end section 24 'of the room divider element 12.
  • the arrangement is taken so that the output rod 22 in the maximum extended Always a little way in the lead room 14 protrudes and is supported in the transverse direction.
  • the cross-sectional area of the connecting rod 16 is less than that of the piston 15 or the output rod 22. Your cross-sectional length and their cross-sectional width is smaller than the corresponding ones Dimensions of the receiving space 3, so that all around a space on all sides between the connecting rod 16 and the peripheral wall 2 is present.
  • the room divider element 12 is in the present case with respect to the Cylinder housing 1 separate component, the kind of a Partition wall with a seal to the peripheral wall 2 inside of the receiving space 3 is set.
  • the fluid tight Sealing prevents pressure medium from escaping the adjacent second work space 33 Sealing contact between the room divider element 12 and the Connecting rod 16 before, so that in the area of Breakthrough 17 a fluid leak is excluded.
  • the room divider element 12 has on the outer circumference a circumferential outer sealing projection 36, the rests on the inside against the peripheral wall 2. Furthermore is also in the interior of the opening 17 integrally formed on the room divider element 12 all-round inner sealing projection 37, which the connecting rod 16 coaxially encloses under sealing contact.
  • the sealing projections 36, 37 can be in the manner of sealing lips be formed that have a certain inclined course have, with their free end to the second to be sealed Working space 33 points.
  • the room divider element 12 on the outer circumference in addition to the outer sealing projection 36 at least one complementary to the receiving space 3 contoured bearing section 38 has that for the transverse fixation of the room divider element 12 serves and over which the room divider element 12 tired in the recording room 3 sits.
  • Said bearing section 38 extends 1 in the exemplary embodiment according to FIG a partial length of the room dividing element 12.
  • a fastening device 39 which is also a positive Fixation with respect to the cylinder housing 1 causes.
  • the fastening device 39 comprises these two as dowel pins trained cross pins that the space divider element 12 preferably diametrically opposite points across enforce and with their end areas, not shown are fixed in position in the peripheral wall 2.
  • the space divider element 12 preferably consists entirely of Plastic material with the described properties, see above that it is with integrally molded outer and inner sealants 36, 37 can represent a single component, in which the stroke limitation function and the sealing function are combined.
  • Such a room divider element 12 can be manufactured inexpensively by injection molding.
  • the two first and second connection openings mentioned 34, 35 are in the exemplary embodiment on connecting pieces 42, 43 provided, which is attached to the cylinder housing 1 are.
  • the end wall 4 has one to the first Work space 32 open central recess 44, in the Circumferential area to the outside of the cylinder housing 1 open transverse bore 45 is provided.
  • the first connection piece 42 with a pin-like end section 46 used. It can be a press and / or There is an adhesive connection, as well as a screw connection.
  • a penetrating the first connecting piece 42 Channel 47 opens into recess 44 on the inside and ends on the outside with the first connection opening 34.
  • the first connecting piece 42 is preferred as a plug nipple trained on which a pressure medium line can be plugged via which the fluidic pressure medium is supplied and discharged becomes.
  • the second connection opening 35 is on the correspondingly designed second connecting piece 43 is provided.
  • the Fluid channel is preferably formed by a longitudinal gap 53, the radially between the connecting rod 16th and the surrounding wall of the opening 17 is located. This longitudinal gap 53 extends in the embodiment over the entire circumference of the connecting rod 16.
  • the mentioned inner sealing projection 37 is located between the mouth of the transverse recess 48 and the front end portion 24 lying area of the Opening 17.
  • FIG. 4 is essentially identical to that of FIGS. 1 to 3, so that the above Description applies accordingly. differences are only in the design of the Room divider element 12 and the connecting rod 16 and the connecting device 25. To improve the Fluid flow is in the connecting rod 16 surrounding wall of the opening 17 a groove-like Longitudinal recess 54 introduced into the transverse recess 48 empties, and an enlargement of the available standing flow cross section of the associated fluid channel 52 causes.
  • the connecting rod 16 via a threaded connection on the output rod 22 fixed. Your outer end 18 is with one External thread 25 '' provided that in a complementary Internal thread of the recess 26 is screwed.
  • the connecting rod 16 expediently a circular cross-section over its entire length.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Soil Working Implements (AREA)

Claims (17)

  1. Cylindre de travail de construction plate, comportant un boítier (1) qui présente un contour de section transversale de forme au moins sensiblement rectangulaire et qui délimite une chambre de réception (3) qui présente également un contour de section transversale de forme au moins sensiblement rectangulaire et dans laquelle est disposé un piston (15) de contour complémentaire et déplaçable axialement, qui est relié à une tige menée (22) qui sort de la chambre de réception (3) sur un côté frontal (6) ouvert du boítier et dont le segment de longueur, se trouvant à l'intérieur de la chambre de réception (3), présente un contour complémentaire de la chambre de réception (3), et qui est monté déplaçable axialement, le segment de longueur de la chambre de réception (3), qui se situe sur le côté axial du piston (15) opposé à la tige menée (22), formant une première chambre de travail (32) qui communique avec une ouverture de raccordement (34) pour l'arrivée et/ou le départ d'un fluide sous pression, caractérisé en ce que le piston (15) et la tige menée (22) sont disposés à distance axiale l'un de l'autre et sont accouplés en déplacement par une tige de liaison (16) située entre eux dont la section transversale est inférieure à celle du piston (15) et du segment de longueur guidé de la tige menée (22), en ce qu'à l'intérieur de la chambre de réception (3), à distance axiale du côté frontal (6) ouvert du boítier, sur lequel sort la tige menée (22), est fixé de manière étanche un élément diviseur (12) qui se trouve axialement entre le piston (15) et la tige menée (22) et qui est traversé axialement et de manière étanche par la tige de liaison (16), et en ce que l'élément diviseur (12) divise axialement le segment de longueur de la chambre de réception (3), qui se trouve entre le piston (15) et le côté frontal (6) ouvert du boítier, en une deuxième chambre de travail (33) se trouvant sur le côté tourné vers le piston (15) et une chambre de guidage (14) tournée vers le côté frontal (6) ouvert du boítier, la deuxième chambre de travail (33) communiquant avec une ouverture de raccordement (35) pour l'arrivée et/ou le départ d'un fluide sous pression, et la chambre de guidage (14) recevant le segment de longueur de la tige menée (22), qui se trouve à l'intérieur de la chambre de réception (3).
  2. Cylindre de travail selon la revendication 1, caractérisé en ce que la tige de liaison (16) présente un contour de section transversale au moins sensiblement rectangulaire.
  3. Cylindre de travail selon la revendication 1 ou 2, caractérisé en ce que l'élément diviseur (12) sert d'élément de limitation de course sur lequel le piston (15) et/ou la tige menée (22) bute pour limiter la course d'entrée ou de sortie.
  4. Cylindre de travail selon l'une des revendications 1 à 3, caractérisé en ce que l'élément diviseur (13) est un élément en matière plastique, de préférence un élément en élastomère.
  5. Cylindre de travail selon la revendication 4, caractérisé en ce que sur le pourtour extérieur de l'élément diviseur (12) est formée au moins une saillie d'étanchéité (36) extérieure et périphérique qui s'applique contre la paroi périphérique (2) de la chambre de réception (3).
  6. Cylindre de travail selon la revendication 4 ou 5, caractérisé en ce qu'à l'ajour (17) de l'élément diviseur (12), traversé par la tige de liaison (16), est associée au moins une saillie d'étanchéité intérieure (37) formée sur l'élément diviseur, qui s'applique périphériquement contre le pourtour extérieur de la tige de liaison (16).
  7. Cylindre de travail selon la revendication 6, caractérisé en ce que la saillie d'étanchéité intérieure (37) se trouve à l'intérieur de l'ajour (17).
  8. Cylindre de travail selon l'une des revendications 1 à 7, caractérisé en ce que l'élément diviseur (12) est introduit dans la chambre de réception (3) et est maintenu en place par au moins une goupille transversale (39) ancrée par une extrémité dans le boítier (1) du cylindre.
  9. Cylindre de travail selon l'une des revendications 1 à 8, caractérisé en ce que la liaison fluidique entre la deuxième chambre de travail (33) et l'ouverture de raccord (35) correspondante s'effectue par un canal de fluide (52), qui s'étend dans l'élément diviseur (12) et qui débouche sur la face frontale, tournée vers la deuxième chambre de travail (33), de l'élément diviseur (12).
  10. Cylindre de travail selon la revendication 9, caractérisé en ce qu'au moins un tronçon du canal de fluide (52) est constitué par une fente longitudinale (53) formée entre la tige de liaison (16) et la paroi de l'ajour (17) entourant cette tige.
  11. Cylindre de travail selon l'une des revendications 1 à 10, caractérisé en ce que l'ouverture de raccordement (35), affectée à la deuxième chambre de travail (33), est prévue sur une tubulure de raccordement (43) qui traverse la paroi périphérique (2) de la chambre de réception (3) et qui s'engage, par un segment terminal (46), dans un évidement transversal (48) de l'élément diviseur (12).
  12. Cylindre de travail selon l'une des revendications 1 à 11, caractérisé en ce que la tige menée (22) et la tige de liaison (16) sont réalisées sous la forme de composants séparés fixés l'un à l'autre au moyen d'un dispositif de liaison (25, 25', 25").
  13. Cylindre de travail selon la revendication 12, caractérisé en ce que la tige de liaison (16) s'engage dans un évidement frontal (26) de la tige menée (22) et est fixée dans celle-ci.
  14. Cylindre de travail selon l'une des revendications 1 à 13, caractérisé en ce que la tige menée (22) est un élément en matière plastique notamment du type plaque.
  15. Cylindre de travail selon l'une des revendications 1 à 14, caractérisé en ce que le piston (15) est un élément en matière plastique fixé par une opération de moulage sur la tige de piston (16).
  16. Cylindre de travail selon l'une des revendications 1 à 15, caractérisé en ce que les petits côtés d'au moins un élément desdits composants, de contour au moins sensiblement rectangulaire, sont arrondis.
  17. Cylindre de travail selon la revendication 16, caractérisé en ce que les composants de contour au moins sensiblement rectangulaire présentent une section transversale avec des côtés longitudinaux (8, 8') rectilignes et parallèles entre eux et des petits côtés (9, 9') de contour en forme de demi-cercle.
EP95115590A 1994-12-16 1995-10-04 Vérin de travail du type plat Expired - Lifetime EP0717199B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9420116U DE9420116U1 (de) 1994-12-16 1994-12-16 Arbeitszylinder in Flachbauweise
DE9420116U 1994-12-16

Publications (2)

Publication Number Publication Date
EP0717199A1 EP0717199A1 (fr) 1996-06-19
EP0717199B1 true EP0717199B1 (fr) 2000-04-19

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Application Number Title Priority Date Filing Date
EP95115590A Expired - Lifetime EP0717199B1 (fr) 1994-12-16 1995-10-04 Vérin de travail du type plat

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EP (1) EP0717199B1 (fr)
DE (2) DE9420116U1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812472C2 (de) 1998-03-23 2000-12-14 Lukas Hydraulik Gmbh & Co Kg Hebeeinrichtung zum Anheben schwerer Lasten, insbesondere entgleister Schienenfahrzeuge
DE59910653D1 (de) * 1999-03-24 2004-11-04 Lukas Hydraulik Gmbh & Co Kg Hebeeinrichtung zum Anheben schwerer Lasten, insbesondere entgleister Schienenfahrzeuge

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2926258C2 (de) * 1979-06-29 1981-08-13 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Einfach wirkender Stellantrieb
DE3242788C2 (de) * 1982-11-19 1985-02-07 Tünkers Maschinenbau GmbH, 4030 Ratingen Druckmittelbetätigbare Kniehebelspannvorrichtung
JPS6263204A (ja) * 1985-09-13 1987-03-19 Hongou Seisakusho:Kk シリンダ
CH674058A5 (fr) * 1986-10-22 1990-04-30 Festo Kg
JP2710724B2 (ja) * 1992-02-18 1998-02-10 シーケーディ株式会社 角形偏平シリンダ

Also Published As

Publication number Publication date
DE59508193D1 (de) 2000-05-25
EP0717199A1 (fr) 1996-06-19
DE9420116U1 (de) 1995-02-02

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