EP1416166B1 - Endlagengedämpfter Pneumatikzylinder - Google Patents
Endlagengedämpfter Pneumatikzylinder Download PDFInfo
- Publication number
- EP1416166B1 EP1416166B1 EP20030103653 EP03103653A EP1416166B1 EP 1416166 B1 EP1416166 B1 EP 1416166B1 EP 20030103653 EP20030103653 EP 20030103653 EP 03103653 A EP03103653 A EP 03103653A EP 1416166 B1 EP1416166 B1 EP 1416166B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- cylinder
- travel
- pneumatic cylinder
- damping
- 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
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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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/227—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having an auxiliary cushioning piston within the main piston or the cylinder end face
Definitions
- the invention relates to a endlagengedämpften pneumatic cylinder with a through end cap cylinder closed cylinder housing in which a piston over a at least one-sided Druckschbeetzschung is arranged axially movable, on which a piston rod is attached, which seals at least one of the cylinder cover penetrates, further comprising means for cushioning the piston are provided.
- Such pneumatic cylinders are used as a linear drive unit in many areas of the Mechanical and plant engineering, especially in handling technology used.
- a End position damping is required for a pneumatic cylinder when the concrete Application case controlled lowering of the stroke speed shortly before reaching the end position requires.
- the stress on the pneumatic cylinder is reduced and it will be Vibrations in the support structure in which the pneumatic cylinder is installed, reduced.
- a reliably functioning cushioning is especially at Applications with high speeds and large masses necessary.
- a first principle is used an elastomeric body to realize a simple stop cushioning.
- shock absorbers are used.
- the third principle uses a purely pneumatic damping.
- the present invention is the latter Assign pneumatic damping principle.
- the pneumatic cylinder corresponds to the Standard DIN ISO 6431 and consists essentially of a tubular Cylinder housing, which is closed on both sides with cylinder covers. The two Cylinder covers are detachably fastened to the cylinder housing via four external tie rods. Within the cylinder housing is a piston acted upon by pressure medium on both sides arranged. The pressure medium is applied here in the two cylinder covers each trained pressure medium connections. From the piston extends a piston rod, which the one cylinder cap sealed penetrates to the over the Pressure medium applied to direct the generated linear force to the outside. Further is the pneumatic cylinder is equipped with pneumatic cushioning on both sides.
- EP 1 041 293 A2 is a generic endlagengedämpfter pneumatic cylinder out.
- For double-end cushioning are two slidably mounted on the piston Sockets provided on the piston via a coil spring from the end face is attached protruding.
- the bushing is overcoming the spiral spring generated reaction force in the piston retractable.
- the so arranged on the piston socket accomplishes the cushioning by closing a corresponding annular exhaust port as the main flow cross section in the associated cylinder cover, so that in the Endlagendämpfungs Scheme only a parallel further exhaust port smaller diameter remains, which by a delay of the air outlet the End position damping causes.
- the length of Endanschlagsweg Schemes is here by the Length of the spiral spring determined.
- a disadvantage of this solution is the susceptibility to corrosion the spring made of a spring steel spiral spring.
- Humidity of the compressed air can for Oxidation of the coil spring lead, which in extreme cases to the break of the coil spring after certain Operating time and thus can lead to failure of the end position damping.
- This hollow cylinder section requires space in the form of a corresponding recess on the part of the associated cylinder cover, so that the width of the cylinder cover depends on the desired damping length.
- this solution for a cushioning so also leads to a fairly large Length of the pneumatic cylinder.
- US 2,642,845 discloses another solution for a Endlagegedämpften Pneumatic cylinder.
- cushioning used here is a piston attached approximately hat-shaped rubber sleeve, which in the same manner as in the above-explained State of the art cooperates with the associated cylinder cover to the To realize cushioning.
- a disadvantage of this solution is that the Rubber boot can lose elasticity after prolonged use, so that the Available damping length because of the occurring Material fatigue phenomena shortened after longer service life.
- the object of the present invention to provide a pneumatic cylinder, the reliable acting pneumatic means for cushioning has the simple are constructed and do not increase the length of the pneumatic cylinder.
- the invention includes the technical teaching that the means for cushioning a coaxially slidably mounted on the piston sleeve, which in the starting position protruding from an end face of the piston and overcoming a Reaction force in the piston is retractable, wherein the distal end of the bushing the End position damping by closing a corresponding annular Exhaust opening as the main flow cross section in the associated cylinder lid initiates, so that in Endanschlagsweg Switzerland only a parallel exhaust port as Remaining flow cross section remains.
- the advantage of the solution according to the invention is in particular that on the part of the Cylinder on additional recesses for receiving components of the End position damping can be completely dispensed with.
- the cylinder cover can be right be formed flat, so that the overall length of the endlagegedämpften Pneumatic cylinder is minimal.
- the attenuation path determining Components of the end position damping integrated into the piston.
- many individual components for the production of both Variants are used. This refers in particular to the production of the Cylinder housing and the piston rods, which are identical for both variants Application can come.
- Another advantage of the invention is that the provided by the piston means for cushioning in a simple manner in Injection molding of plastic are manufacturable, which significantly reduces the manufacturing cost lowers.
- the Endlagendämpfung proves to be extremely robust, since this completely according to Art realized a pneumatic principle.
- the reaction force which brings and holds the bush in the extended starting position, is to be dimensioned so that a reliable extension of the socket from the retracted position is guaranteed out.
- the reaction force is via one in the piston trained opposite the bush rear chamber applied, which has a Pressure medium applied to the piston driving cylinder chamber with acted upon becomes.
- the admission of the rear pressure chamber by means of a for Cylinder chamber leading through simple through-hole can be realized in the piston.
- reaction force via a piston used in and to apply the bushing acting on the rear compression spring.
- the piston is for Housing the piston-side means for cushioning constructed in several parts.
- the piston consists of a support member which connects to the piston rod manufactures. This can be done by screwing or pressing the piston rod into one Corresponding coaxial recess in the carrier part done.
- the guide part forms a part of the inside radially rearward pressure chamber in which the sleeve is mounted axially displaceable.
- the degree of damping of the end position damping can by means of a cylinder cover to be arranged manually adjustable damping screw can be realized adjustable by via a screwing in or out of the damping screw a corresponding change the residual flow cross-section of the parallel exhaust port.
- the inventive means for cushioning can in a pneumatic cylinder either provided only by a cylinder cover or both sides of the cylinder cover become. It is so far a combination with differently constructed means for End position damping possible with one and the same pneumatic cylinder.
- An alternative Means for cushioning represents, for example, the above-explained pneumatic Locking Radiator Lip Seal Concept.
- the endlagengedämpfte pneumatic cylinder according to Figure 1 consists essentially of an extruded cylinder housing 1 made of light metal, the end face side with Cylinder covers 2 and 3 is closed. Both cylinder covers 2 and 3 are about diverse Screwed screws 4 to the cylinder housing 1.
- Within the cylinder housing 1 is a Piston 5 mounted axially movable. From the piston 5 from a piston rod 6, which runs the a cylinder cover 2 penetrates sealed by a through hole 7. The Piston rod 6 performs a retraction movement in the pneumatic cylinder when the piston 5 via a formed in the cylinder cover 2 pressure medium connection 8 with compressed air is charged. Analogously, the piston rod 6 performs an extension movement when the piston 5 is acted upon via the pressure medium connection 3 with compressed air.
- the present pneumatic cylinder double acting.
- the pneumatic cylinder is equipped with a double-sided cushioning, wherein each cylinder cover 2 and 3 corresponding damping screws 10 and 11 for Setting the degree of damping are assigned.
- the two damping screws 10 and 11 are in corresponding - not visible here - threaded sections Can be screwed in to narrow the channel.
- the inventive means for cushioning are only here one-sided, namely provided on the sides of the cylinder cover 2. These have one on the piston 5 slidably mounted socket 12.
- the socket 12 is here in its starting position shown and is from the cylinder cover 2 toward facing end face 13 of the Piston 5 forth.
- the dimension X determines the Endanschlagsweg Scheme in which the Damping works.
- the bushing 12 is retractable within a piston 5 formed in the rearward pressure chamber 14 stored.
- the piston 5 consists in detail of a Support member 15 which is pressed or screwed tightly on the piston rod 6.
- an annular guide member 16 is attached. External radial on the guide member 16 is a elastomeric piston seal 17 is held.
- the piston seal 17 seals the piston 5 from the inner wall of the cylinder housing 1 from.
- Inner Radial is through the Shaping the guide member 16 a majority of the rear pressure chamber 14 of the socket 12 formed. Between the support member 15 and the guide member 16 is still a circumferential outer radial groove formed, which for receiving an annular Magnet 19 is used.
- the magnet 19 is part of a known electronic Device for detecting the piston position via a corresponding inductive induction sensor.
- the annular magnet 19 is covered by a guide band 18 to the sliding friction between the piston 5 and the inner wall of the cylinder housing 1 to minimize.
- the bush closes 12 via an end face side arranged annular seal 22 an annular Exhaust port 27, which the main flow cross-section for the out of the cylinder chamber 20th forms escaping exhaust air.
- the Endlagendämpfung sets in that only the right lower residual flow cross-section of the remaining parallel exhaust port 24 to Available.
- the pressure increases in the room 23, the speed of the piston rod 6 decreases. In the course of cushioning the bush 12 is in the pressure chamber 14 of the piston 15 is moved until finally the piston 5 with its end face 13 completely on the cylinder cover 2 comes to rest.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Fluid-Damping Devices (AREA)
Description
- Figur 1
- eine Explosionsdarstellung eines doppeltwirkenden Pneumatikzylinders mit beidseitiger Endlagendämpfung,
- Figur 2
- einen Längsschnitt durch den endlagengedämpften Pneumatikzylinder nach Figur 1 in der Ausgangsposition, und
- Figur 3
- einen Längsschnitt durch den endlagengedämpften Pneumatikzylinder nach Figur 1 in der Dämpfungsposition.
- 1
- Zylindergehäuse
- 2
- Zylinderdeckel
- 3
- Zylinderdeckel
- 4
- Schraube
- 5
- Kolben
- 6
- Kolbenstange
- 7
- Durchgangsöffnung
- 8
- Druckmittelanschluss
- 9
- Druckmittelanschluss
- 10
- Dämpfungsschraube
- 11
- Dämpfungsschraube
- 12
- Buchse
- 13
- Stirnseitenfläche
- 14
- Druckkammer
- 15
- Trägerteil
- 16
- Führungsteil
- 17
- Kolbendichtung
- 18
- Führungsband
- 19
- Magnet
- 20
- Zylinderkammer
- 21
- Durchgangsbohrung
- 22
- Dichtung
- 23
- Zylinderkammer
- 24
- Abluftöffnung
- 25
- Ansatzzapfen
- 26
- Radiallippendichtung
- 27
- Abluftöffnung
Claims (8)
- Endlagengedämpfter Pneumatikzylinder mit einem durch endseitige Zylinderdeckel (2, 3) verschlossenen Zylindergehäuse (1) in dem ein Kolben (5) über eine zumindest einseitige Druckmittelbeaufschlagung axial bewegbar angeordnet ist, an welcher eine Kolbenstange (6) angebracht ist, die zumindest einen der Zylinderdeckel (2) abgedichtet durchdringt, wobei Mittel zur Endlagendämpfung des Kolbens (5) vorgesehen sind,
die eine koaxial am Kolben (5) verschiebbar befestigte Buchse (12) aufweisen, die in der Ausgangsposition von einer Stirnseitenfläche (13) des Kolbens (5) hervorsteht und unter Überwindung einer Reaktionskraft in den Kolben (5) versenkbar ist, wobei das distale Ende der Buchse (12) die Endlagendämpfung durch Verschließen einer korrespondierenden ringförmigen Abluftöffnung (27) als Hauptströmungsquerschnitt im zugeordneten Zylinderdeckel (2) einleitet, so dass im Endanschlagswegbereich (X) nur eine parallele Abluftöffnung (24) als Restströmungsquerschnitt verbleibt,
dadurch gekennzeichnet, dass die Reaktionskraft über eine im Kolben (5) ausgebildete gegenüber der Buchse (12) rückwärtige Druckkammer (14) aufbringbar ist, die über eine Druckmittelbeaufschlagung der den Kolben (5) antreibenden Zylinderkammer (20) mit beaufschlagbar ist. - Endlagengedämpfter Pneumatikzylinder nach Anspruch 1,
dadurch gekennzeichnet, dass die Beaufschlagung der rückwärtigen Druckkammer (14) bei Beaufschlagung der Zylinderkammer (20) mittels einer die Druckkammer (14) mit der Zylinderkammer (20) verbindenden Durchgangsbohrung (21) im Kolben (5) realisiert ist. - Endlagengedämpfter Pneumatikzylinder nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass am distalen Ende der Buchse (12) eine elastomere Dichtung (22) nach Art eines O-Rings angebracht ist. - Endlagengedämpfter Pneumatikzylinder nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass der mehrteilig aufgebaute Kolben (5) ein Trägerteil (15) aufweist, das die Verbindung zur Kolbenstange (6) herstellt, und das ein am Trägerteil (15) befestigtes ringförmiges Führungsteil (16) zur außenradialen Aufnahme einer elastomeren Kolbendichtung (17) vorgesehen ist, welches innenradial zumindest einen Teil der rückwärtigen Druckkammer (14) in welcher die Buchse (12) axial verschiebbar angeordnet ist bildet. - Endlagengedämpfter Pneumatikzylinder nach Anspruch 4
dadurch gekennzeichnet, dass der Kolben (5) weiterhin eine zwischen dem Trägerteil (15) und dem Führungsteil (16) ausgebildete außenradiale Nut zur Aufnahme eines ringförmigen Magneten (18) zur induktiven Detektion der Kolbenstellung aufweist. - Endlagengedämpfter Pneumatikzylinder nach Anspruch 5
dadurch gekennzeichnet, dass die mit dem Magneten (19) versehene Nut durch ein Führungsband (18) verschlossen ist, um die Gleitreibung zwischen dem Kolben (5) und dem Zylindergehäuse (1) zu minimieren. - Endlagengedämpfter Pneumatikzylinder nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass zur Einstellung des Dämpfungsgrades eine im Zylinderdeckel (2, 3) angeordnete Dämpfungsschraube (10, 11) vorgesehen ist, deren Hinein- oder Herausdrehen den Strömungsquerschnitt der Abluftöffnung (24) ändert. - Endlagengedämpfter Pneumatikzylinder nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Mittel zur Endlagendämpfung seitens eines Zylinderdeckels (2) oder seitens beider Zylinderdeckel (2, 3) vorgesehen sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002146766 DE10246766B3 (de) | 2002-10-07 | 2002-10-07 | Endlagengedämpfter Pneumatikzylinder |
DE10246766 | 2002-10-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1416166A1 EP1416166A1 (de) | 2004-05-06 |
EP1416166B1 true EP1416166B1 (de) | 2005-12-28 |
Family
ID=32086853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030103653 Expired - Lifetime EP1416166B1 (de) | 2002-10-07 | 2003-10-02 | Endlagengedämpfter Pneumatikzylinder |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1416166B1 (de) |
DE (2) | DE10246766B3 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT504592B1 (de) * | 2007-05-24 | 2008-06-15 | Hoerbiger Origa Holding Ag | Pneumatikzylinder mit einer und verfahren zur selbsteinstellenden endlagendämpfung |
EP1998054B1 (de) | 2007-05-24 | 2014-08-13 | Parker Origa Holding AG | Pneumatikzylinder mit einer selbsteinstellenden Endlagendämpfung und entsprechendes Verfahren |
DE102010032359A1 (de) | 2010-07-27 | 2012-02-02 | Robert Bosch Gmbh | Vorrichtung und Verfahren zur geschwindigkeitsabhängigen Endlagendämpfung eines Kolbens |
CN111946587B (zh) * | 2020-08-24 | 2022-04-22 | 中国石油化工集团有限公司 | 一种自卸压可调缓冲气体增压缸 |
DE102022134281A1 (de) | 2022-12-21 | 2024-06-27 | Amazonen-Werke H. Dreyer SE & Co. KG | Fluidzylinder für eine landwirtschaftliche Maschine, sowie eine landwirtschaftliche Maschine |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2642845A (en) * | 1950-12-20 | 1953-06-23 | Westinghouse Air Brake Co | Piston cushioning apparatus |
FR1290632A (fr) * | 1961-05-26 | 1962-04-13 | Maxam Power Ltd | Perfectionnements aux dispositifs à piston et cylindre pour moutons et appareils analogues actionnés par un fluide |
DE7635587U1 (de) * | 1976-11-11 | 1977-03-10 | Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen | Pneumatische oder hydraulische Kolbenzylinder-Einheit |
DE3920293A1 (de) * | 1989-06-21 | 1991-01-10 | Festo Kg | Kolben-zylinder-aggregat |
DE9111009U1 (de) * | 1991-09-05 | 1993-01-14 | Hydraulik Techniek, Emmen | Hydraulikzylinder |
DE9111000U1 (de) * | 1991-09-05 | 1991-10-17 | Hydraulik Techniek, Emmen | Hydraulischer Hubzylinder |
US5309817A (en) * | 1993-03-05 | 1994-05-10 | Sims James O | Linear brake for fluid actuator |
DE29615799U1 (de) * | 1996-09-11 | 1996-10-31 | Festo Kg, 73734 Esslingen | Vorrichtung zur Endlagendämpfung |
DE29706364U1 (de) * | 1997-04-10 | 1997-06-19 | Bümach Engineering International B.V., Emmen | Endlagengedämpfter Arbeitszylinder |
IT1312235B1 (it) * | 1999-03-29 | 2002-04-09 | Luciano Migliori | Dispositivo ammortizzatore per cilindri pneumatici. |
JP2002048108A (ja) * | 2000-08-04 | 2002-02-15 | Smc Corp | 位置検出センサの取付構造 |
-
2002
- 2002-10-07 DE DE2002146766 patent/DE10246766B3/de not_active Expired - Fee Related
-
2003
- 2003-10-02 EP EP20030103653 patent/EP1416166B1/de not_active Expired - Lifetime
- 2003-10-02 DE DE50302047T patent/DE50302047D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1416166A1 (de) | 2004-05-06 |
DE50302047D1 (de) | 2006-02-02 |
DE10246766B3 (de) | 2004-07-01 |
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