EP1447571B1 - Endlagengedämpfter Pneumatikzylinder mit verstellbarer Endlagendämpfung - Google Patents
Endlagengedämpfter Pneumatikzylinder mit verstellbarer Endlagendämpfung Download PDFInfo
- Publication number
- EP1447571B1 EP1447571B1 EP20040100496 EP04100496A EP1447571B1 EP 1447571 B1 EP1447571 B1 EP 1447571B1 EP 20040100496 EP20040100496 EP 20040100496 EP 04100496 A EP04100496 A EP 04100496A EP 1447571 B1 EP1447571 B1 EP 1447571B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- travel
- damping
- pneumatic cylinder
- stop 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
Links
- 238000013016 damping Methods 0.000 claims description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000013536 elastomeric material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
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
- F15B15/223—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which completely seals the main fluid outlet as the piston approaches its end position
Definitions
- the invention relates to an endlagengedämpften pneumatic cylinder, in whose Cylinder housing an at least one side acted upon piston axially movable is accommodated, wherein at least one of the two pressure chambers formed thereby Means is equipped for an adjustable end position damping of the piston.
- damping is the speed of the piston shortly before reaching the end position by braked corresponding components, which usually form an additional throttle point in principle, through which the compressed air to be displaced from the pneumatic cylinder flow must, so that the desired delay arises.
- From DE 196 45 701 A1 is another generic endlagegedämpfter Pneumatic cylinder with variable damping length out.
- the damping is here by means of a control valve arrangement generates, through which the compressed air flowing through at least is temporarily throttled.
- the control valve assembly has compressed air connections and Control terminals connected to an electronic control unit.
- Throttling of the compressed air flow has the control valve arrangement in addition to a first Passage cross section still a second, smaller passage cross-section and a Change-over valve for switching between the two passage cross-sections.
- the Switching to the smaller passage cross-section is a temporary throttling of the Compressed air supply in the pressure cylinder for cushioning causes.
- About the electronic control unit is because of a cooperating with this permanent Position detection of the piston the onset of cushioning, that is the here Switching between the two passage cross sections, flexibly adjustable. Indeed This solution requires a fairly high amount of additional valve technology as well Control electronics.
- the invention includes the technical teaching that as a means for an adjustable End position damping a frontally spaced on the piston via compression spring means attached, at least partially iron metallic stop element is provided, which in a piston near basic position G by the magnetic force of at least one Permanent magnet is fixed to the piston, and which in a piston remote working position A protrudes into the adjacent pressure chamber for cushioning, with an outside along the cylinder housing for determining the damping length adjustable Magnetic element for the generation of a relative to the magnetic field of the permanent magnet is provided in substantially inverted magnetic field to a change in position of the To achieve stop element from the basic position G in the working position A, when the Piston passes shortly before reaching the end position of the magnetic element.
- the advantage of the solution according to the invention lies in the fact that with a Adjustment of the outside of the cylinder housing attached magnetic element Damping length is flexibly adaptable to every application. This adjustment takes place in easy way manually, without the need for control engineering effort is required.
- the damping strength can also be adjusted manually via an adjustable throttle in conventional Be customized.
- the two are the end position damping Parameter damping length and damping strength directly on the pneumatic cylinder by light understandable operating steps adjustable.
- the inventive mechanical solution for End position damping requires only a small additional component cost, the Compactness of the pneumatic cylinder is not affected. This is how the length of the Pneumatic cylinder thereby not increased.
- a particularly reliable holding the iron metal stop member in the piston-close basic position G results when the permanent magnet is a hollow cylinder is formed, adapted to a preferably annular formation of the stop element, wherein the pressure spring means carrying the stop element from the hollow cylindrical Permanent magnet is at least partially enclosed.
- This relative arrangement of said components to each other also ensures their compact Housing within the limited space in the piston.
- the compression spring means in the manner of a coil spring or in the manner of a Elastomer bellows formed, which is attached on the one hand to the piston and on the other carries the stop element. It is conceivable that the compression spring itself by his Spring effect contributes to cushioning.
- the compression spring means only a small specific spring constant, which is such that a Axial movement of the stop element of the piston near basic position G springing in the piston-distant working position A is ensured.
- the cushioning is preferably such that the stop element in the far away from working position A when approaching the piston to the end position from reaching one defined by the axial spacing of the stop element from the piston Damping distance X a arranged in the associated cylinder cover corresponding Closes opening, so that for the rest of the pressure chamber escaping exhaust air only the residual flow cross-section provided by a second bypass opening remains.
- the stop element advantageously consists of different Materials, namely to the piston side facing iron and to the opposite, the cylinder cover facing side of an elastomeric material.
- the stop element can thus be produced in a simple manner as a rubber-metal part become.
- the preferably annular stop element corresponds to the in Cylinder cover provided opening, which, for example, as an annular gap or as an in a circular array arranged hole series can be formed.
- this is along the cylinder housing for determining the damping length adjustable magnetic element an electric solenoid, which is opposite to that in the piston integrated permanent magnet is aligned so that when energized opposite to the magnetic field of the permanent magnet substantially inverted magnetic field results, which disturbs the magnetic field of the permanent magnet by this partially will be annulled.
- the energization of the solenoid can via an electronic Control unit, which is an optional switching on or off the End position damping allows.
- the control of the solenoid can together with the control of a solenoid valve acting on the solenoid valve, so that a separate control device is not required.
- the figure shows a longitudinal section through an endlagengedämpften pneumatic cylinder with variable damping length.
- the pneumatic cylinder consists essentially of a cylinder housing 1, in which a piston 2 is housed axially displaceable.
- the piston 2 is provided with two annular Sealing elements 3a and 3b provided, which on the inner wall of the cylinder housing. 1 come into contact via corresponding sealing lip sections.
- the piston 2 divides the Interior of the cylinder housing 1 in two pressure chambers 4a and 4b.
- the pressure chambers 4a and 4b are further limited by sealingly attached to the cylinder housing 1 at the end Cylinder cover 5a and 5b.
- a piston rod 6 runs.
- the piston rod 6 penetrates sealed by the cylinder cover 5b.
- For sealing the cylinder cover 5b opposite the piston rod 6 is an annular sealing element 7 in the cylinder cover 5b arranged. Axially adjacent to the sealing element 7, the cylinder cover 5b continues to have a Guide bush 8, which serves a precise axial guidance of the piston rod 6.
- two pressure medium connections 9a and 9b are provided in the cylinder cover 5a and 5b, respectively.
- the pressure medium connection 9a is in communication with the pressure chamber 4a, whereas the Pressure medium connection 9b for acting on the pressure chamber 4b is used.
- annular stop elements 10a, 10b correspond to the execution of the End position damping with associated openings 12a and 12b, which here take the form of a Have annular gaps, the shape of the acting as a closure element stop element 10a or 10b is adjusted.
- the stop element 10a, 10b to the opening 12a or 12b facing side of an elastomeric material, whereas the opposite side is made of iron.
- An adjustable end position damping is achieved in that the stop element 10a, 10b both a piston-near basic position G and a piston-distant working position A. can take. (In the figure, both positions are shown, which are equally for both damping sides apply.)
- the piston-near basic position G is the iron-metallic Stop element 10b by the magnetic force of a hollow cylindrical permanent magnet 15a, 15b fixed to the piston 2.
- piston-distant working position A stands out Stop element 10a - in the manner described above - in the adjacent Pressure chamber 4a into it.
- a magnetic element 16a, 16b manually adjustable along the cylinder housing 1 and releasably secured thereto arranged.
- the magnetic elements 16a, 16b are designed here as electrical magnetic coils, which are powered by a - not shown - electronic control unit. When the magnetic elements 16a and 16b are energized, they develop a magnetic field which is in its polarization with respect to the magnetic field generated by the permanent magnet 15a, 15b is inverted. By this disturbing weakening of the magnetic field of the permanent magnet 15a or 15b dissolves due to the pressing force of the Druckededemlittel 11a and 11b the Stop element 10a or 10b from its magnetic force held near the piston Basic position G and gets into its working position A. Now is the stop element 10a and 10b ready to perform a damping function in the sense explained above.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Description
- 1
- Zylindergehäuse
- 2
- Kolben
- 3
- Dichtelement
- 4
- Druckkammer
- 5
- Zylinderdeckel
- 6
- Kolbenstange
- 7
- Dichtelement
- 8
- Führungsbuchse
- 9
- Anschluss
- 10
- Anschlagelement
- 11
- Druckfedermittel
- 12
- Öffnung
- 13
- Bypassöffnung
- 14
- Drosselschraube
- 15
- Permanentmagnet
- 16
- Magnetelement
- A
- Arbeitsposition
- G
- Grundposition
- X
- Dämpfungsabstand
Claims (10)
- Endlagengedämpfter Pneumatikzylinder, in dessen Zylindergehäuse (1) ein zumindest einseitig beaufschlagbarer Kolben (2) axial bewegbar untergebracht ist, wobei mindestens eine der beiden hierdurch gebildeten Druckkammern (4a, 4b) mit Mitteln für eine verstellbare Endlagendämpfung des Kolbens (2) ausgestattet ist,
dadurch gekennzeichnet, dass als Mittel für eine verstellbare Endlagendämpfung ein stirnseitig am Kolben (2) über Druckfedermittel (11a, 11b) beabstandet angebrachtes, zumindest bereichsweise eisenmetallisches Anschlagelement (10a, 10b) vorgesehen ist, welches in einer kolbennahen Grundposition G durch die Magnetkraft mindestens eines Permanentmagneten (15a, 15b) am Kolben (2) fixiert ist, und welches in einer kolbenfernen Arbeitsposition A zur Endlagendämpfung in die benachbarte Druckkammer (4a, 4b) hineinragt, wobei ein außen entlang des Zylindergehäuses (1) zur Bestimmung des Dämpfungslänge verstellbares Magnetelement (16a, 16b) für die Erzeugung eines gegenüber dem Magnetfeld des Permanentmagneten (15a, 15b) im wesentlichen invertierten Magnetfelds vorgesehen ist, um eine Positionsänderung des Anschlagelements (10a, 10b) aus der Grundposition G in die Arbeitsposition A zu erzielen, wenn der Kolben (2) kurz vor Erreichen der Endlage das Magnetelement (16a, 16b) passiert. - Endlagengedämpfter Pneumatikzylinder gemäß Anspruch 1,
dadurch gekennzeichnet, dass der Permanentmagnet (15a, 15b) hohlzylinderförmig ausgebildet ist und stirnseitig in den Kolben (2), das Druckfedermittel (11a, 11b) zumindest teilweise umschließend, eingelassen ist. - Endlagengedämpfter Pneumatikzylinder gemäß Anspruch 1 oder 2,
dadurch gekennzeichnet, dass das Druckfedermittel (11a, 11b) nach Art einer Spiraldruckfeder oder nach Art eines Elastomerfaltenbalgs ausgebildet ist, welches einerseits am Kolben (2) befestigt ist und andererseits das Anschlagelement (10a, 10b) trägt. - Endlagengedämpfter Pneumatikzylinder nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass das Anschlagelement (10a, 10b) in der kolbenfernen Arbeitsposition A bei Annäherung des Kolbens (2) an die Endlage ab Erreichen eines durch die axiale Beabstandung des Anschlagelements (10a, 10b) vom Kolben (2) definierten Dämpfungsabstandes X eine im zugeordneten Zylinderdeckel (5a, 5b) angeordnete korrespondierende Öffnung (12a bzw. 12b) verschließt, so dass für die restliche aus der Druckkammer (4a bzw. 4b) entweichende Abluft nur der durch eine zweite Bypassöffnung (13a, 13b) zur Verfügung gestellte Restströmungsquerschnitt verbleibt. - Endlagengedämpfter Pneumatikzylinder nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass das Anschlagelement (10a, 10b) zu der dem Kolben (2) zugewandten Seite aus Eisen besteht und zu der gegenüberliegenden, dem Zylinderdeckel (5a, 5b) zugewandten Seite aus einem Elastomermaterial besteht. - Endlagengedämpfter Pneumatikzylinder nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die mit dem ringförmigen Anschlagelement (10a, 10b) korrespondierende Öffnung (12a, 12b) aus einem Ringspalt oder einer in einer Kreisform angeordneten Bohrungsreihe besteht. - Endlagengedämpfter Pneumatikzylinder nach Anspruch 1,
dadurch gekennzeichnet, dass das entlang des Zylindergehäuses (1) zur Bestimmung des Dämpfungslänge verstellbare Magnetelement (16a, 16b) ein Permanentmagnet ist. - Endlagengedämpfter Pneumatikzylinder nach Anspruch 1,
dadurch gekennzeichnet, dass das entlang des Zylindergehäuses (1) zur Bestimmung des Dämpfungslänge verstellbare Magnetelement (16a, 16b) eine elektrische Magnetspule ist. - Endlagengedämpfter Pneumatikzylinder nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass von mindestens einer Stirnseite des Kolbens (2) eine Kolbenstange (6) ausgeht, die einen zugeordneten Zylinderdeckel (5b) abgedichtet durchdringt, oder dass der Kolben mit Mitteln zur Bildung eines kolbenstangenlosen Zylinders zusammenwirkt. - Endlagengedämpfter Pneumatikzylinder nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die krafterzeugende Druckkammer (4a, 4b) über einen äußeren Anschluss (9a, 9b) zur Krafterzeugung mit Druckluft beaufschlagbar ist oder ein Federelement zur Krafterzeugung enthält.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003105954 DE10305954B3 (de) | 2003-02-12 | 2003-02-12 | Endlagengedämpfter Pneumatikzylinder mit verstellbarer Endlagendämpfung |
DE10305954 | 2003-02-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1447571A1 EP1447571A1 (de) | 2004-08-18 |
EP1447571B1 true EP1447571B1 (de) | 2005-09-07 |
Family
ID=32404441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20040100496 Expired - Lifetime EP1447571B1 (de) | 2003-02-12 | 2004-02-10 | Endlagengedämpfter Pneumatikzylinder mit verstellbarer Endlagendämpfung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1447571B1 (de) |
DE (2) | DE10305954B3 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1918592A1 (de) * | 2006-11-03 | 2008-05-07 | Carl Freudenberg KG | Dichtring mit integrierter Endlagendämpfung, Deckel mit Dichtring und Pneumatikzylinder mit Deckel und Dichtring |
EP2107256A1 (de) | 2008-03-31 | 2009-10-07 | Carl Freudenberg KG | Endlagengedämpfter Pneumatikzylinder |
EP2107255A1 (de) | 2008-03-31 | 2009-10-07 | Carl Freudenberg KG | Endlagengedämpfter Pneumatikzylinder |
DE102017117000A1 (de) * | 2017-07-27 | 2019-01-31 | Schunk Gmbh & Co. Kg Spann- Und Greiftechnik | Verfahren zum Steuern eines Aktuators sowie Aktuator |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1729015A1 (de) | 2005-06-03 | 2006-12-06 | FESTO AG & Co | Fluidgerät, insbesondere fluidbetätigter Antrieb |
CN101504019B (zh) * | 2008-12-17 | 2012-05-02 | 国营第三八八厂 | 一种永磁缓冲液压缸 |
DE102009034790B4 (de) * | 2009-07-25 | 2024-02-01 | Aventics Gmbh | Zylinder mit Endlagendämpfung |
DE102010015081A1 (de) | 2010-04-15 | 2011-10-20 | Robert Bosch Gmbh | Endlagengedämpfter Druckmittelzylinder |
CN105422542B (zh) * | 2015-12-22 | 2017-07-28 | 扬州捷迈锻压机械有限公司 | 一种双层退料气缸 |
CN109530652A (zh) * | 2018-11-08 | 2019-03-29 | 贵州华昌汽车电器有限公司 | 一种压铸模具用的接插式不锈钢感应油缸 |
CN118188634B (zh) * | 2024-03-13 | 2024-12-10 | 浙江沃德尔科技集团股份有限公司 | 一种液压执行器行程缓冲结构及其使用方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06100208B2 (ja) * | 1987-05-29 | 1994-12-12 | シ−ケ−デイ株式会社 | 流体圧シリンダ |
DE4322255C2 (de) * | 1993-07-05 | 1996-02-01 | Festo Kg | Dämpfungsvorrichtung |
DE4410103C1 (de) * | 1994-03-21 | 1995-08-31 | Mannesmann Ag | Antrieb der fluidischen oder elektrischen Bauart mit einer Steuerung |
DE19645701A1 (de) * | 1996-11-06 | 1998-05-07 | Wabco Gmbh | Ventileinrichtung für eine durch ein Druckmittel betätigbare Türanlage |
DE29706364U1 (de) * | 1997-04-10 | 1997-06-19 | Bümach Engineering International B.V., Emmen | Endlagengedämpfter Arbeitszylinder |
-
2003
- 2003-02-12 DE DE2003105954 patent/DE10305954B3/de not_active Expired - Fee Related
-
2004
- 2004-02-10 DE DE200450000056 patent/DE502004000056D1/de not_active Expired - Lifetime
- 2004-02-10 EP EP20040100496 patent/EP1447571B1/de not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1918592A1 (de) * | 2006-11-03 | 2008-05-07 | Carl Freudenberg KG | Dichtring mit integrierter Endlagendämpfung, Deckel mit Dichtring und Pneumatikzylinder mit Deckel und Dichtring |
EP2107256A1 (de) | 2008-03-31 | 2009-10-07 | Carl Freudenberg KG | Endlagengedämpfter Pneumatikzylinder |
EP2107255A1 (de) | 2008-03-31 | 2009-10-07 | Carl Freudenberg KG | Endlagengedämpfter Pneumatikzylinder |
DE102017117000A1 (de) * | 2017-07-27 | 2019-01-31 | Schunk Gmbh & Co. Kg Spann- Und Greiftechnik | Verfahren zum Steuern eines Aktuators sowie Aktuator |
Also Published As
Publication number | Publication date |
---|---|
DE502004000056D1 (de) | 2005-10-13 |
DE10305954B3 (de) | 2004-07-01 |
EP1447571A1 (de) | 2004-08-18 |
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