EP2541073A2 - Cylindre pneumatique avec amortissement de fin de course à auto-ajustage - Google Patents

Cylindre pneumatique avec amortissement de fin de course à auto-ajustage Download PDF

Info

Publication number: EP2541073A2
Authority: EP; European Patent Office
Prior art keywords: damping; pressure; control; chamber; control valve
Prior art date: 2011-06-28
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.): Granted

Application number

EP12171413A

Other languages

German (de)

English (en)

Other versions

EP2541073B1 (fr

EP2541073A3 (fr

Inventor

Axel Dr. Fröschle

Peter Rohatschek

Thomas Henke

Rainer Schweizer

Alexander Buchhauser

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.)

Parker Hannifin Manufacturing Germany GmbH and Co KG

Original Assignee

Parker Hannifin Manufacturing Germany GmbH 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.)

2011-06-28

Filing date

2012-06-11

Publication date

2013-01-02

2012-06-11 Application filed by Parker Hannifin Manufacturing Germany GmbH and Co KG filed Critical Parker Hannifin Manufacturing Germany GmbH and Co KG

2013-01-02 Publication of EP2541073A2 publication Critical patent/EP2541073A2/fr

2016-11-02 Publication of EP2541073A3 publication Critical patent/EP2541073A3/fr

2020-08-05 Application granted granted Critical

2020-08-05 Publication of EP2541073B1 publication Critical patent/EP2541073B1/fr

Status Active legal-status Critical Current

2032-06-11 Anticipated expiration legal-status Critical

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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
- F15B15/222—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 throttles the main fluid outlet as the piston approaches its end position
- 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
- F15B15/204—Control means for piston speed or actuating force without external control, e.g. control valve inside the piston

Definitions

the invention relates to a pneumatic cylinder with a cylinder housing and a cylinder piston reciprocating there under pressure, which is acted upon in its one direction of movement via a mutually acting as a pressure line and vent line connecting line with a working pressure and on its respective opposite side in the cylinder interior with a lower exhaust pressure pending air displaced from the cylinder interior, wherein at least one end of Zylinderkolbenweges a damping arrangement is arranged with an in-cylinder space and limited by the moving cylinder piston damping chamber, which is vented to the end position damping of the cylinder piston via a vent path with a control valve turned on, wherein the pneumatically controlled control valve comprises a control piston whose control side facing away from the venting path from one in a control chamber pending pneumatic pressure is applied.
a provided with a cushioning for his cylinder piston pneumatic cylinder with the aforementioned features is from the EP 1 998 054 A2 known.
an axially extending into the cylinder housing Dämpfzapfen provided on the cylinder housing in the reciprocating cylinder piston runs up with a recess formed in it.
Through the damper pin extends a connecting line for the cylinder interior, by means of either compressed air at a working pressure can be supplied to cause the movement of the cylinder piston away from the damper pin, or on the displaced during the movement of the cylinder piston on Dämpfzapfen to the cylinder interior Air is derived.
the damping chamber is connected to the connecting line by means of a ventilation channel forming a ventilation path.
a pneumatically controlled control valve is switched on with a movable in its displacement control piston, which is acted upon on its control side in each case by the force acting on the cylinder piston working pressure.
the invention is therefore an object of the invention to improve in a pneumatic cylinder with the generic features its damping behavior in the end position damping.
control chamber of the control valve is connected by means of a line connection to a region of the damping arrangement which is under aeration pressure, and a closing arrangement with a controlled connection is provided in the line connection Closing element is turned on, by means of which in the control chamber of the control valve at the characterized by a pressure increase in the damping chamber damping start each currently pending venting pressure in the control chamber is included and as such fixed control pressure on the control piston, the control valve acts and determines the opening time of the control valve to release the venting path ,
the invention is thus based on the advantageous principle that the respectively present at the beginning of damping damping in the damping chamber, which is usually lower than the working pressure is used as a threshold for the beginning of the damping with a derivative of the pending in the damping chamber air by this each currently used at the beginning of damping in the damping chamber or in the connecting line existing pressure for controlling the venting path for the damping chamber releasing control valve.
the vent side pressure is established via the created between the control chamber of the control valve and the area under venting portion of the damping arrangement line connection as the control pressure for the control valve, and this line connection is interrupted by the controlled movement of the closing element at the beginning of damping and thus the control pressure for the Control valve fixed.
the operation of the end position damping is independent of the driving style of the pneumatic cylinder, whether with faster or slower piston travel, since it arrives according to the invention exclusively on the vent side pending at the time of damping start.
the energy range or working range of the damping device according to the invention is significantly expanded.
the controlled movement of the closing element can be carried out according to embodiments of the invention in different ways.
the movement of the closing element is electrically controlled as a function of a control signal picked up at the beginning of damping.
the pressure rise in the damping chamber is detected separately, in response to a corresponding signal, the closing element is moved to a position in which it closes the control chamber of the control valve.
the movement of the closing element is mechanically controlled by the relative movement of the cylinder piston to the cylinder housing.
a closing element mechanically acted upon and displaced in its closed position with respect to the control chamber of the control valve pin be arranged such that upon reaching a position of the cylinder piston, in which the beginning of the damping is to take place, the pin comes into contact with the closing element and this at a further movement of the cylinder piston shifts.
the movement of the closing element of the closing arrangement is controlled pneumatically in its closing position, which closes the control chamber of the control valve, by the pressure increasing in the damping chamber at the beginning of the damping.
the closing element is designed as a longitudinally movable piston element in a displacement, wherein at the side facing away from the direction of the closing movement pressure side of the closing element in each case applied pressure in the damping chamber and the lying on the opposite side of the closing element pressure chamber is connected to the control chamber of the control valve.
the piston member may be formed according to embodiments of the invention thereby as a solid piston or as a membrane.
control valve and closing arrangement are arranged in the cylinder cover of the pneumatic cylinder.
the end position damping in the cylinder cover is provided according to a first embodiment of the invention, that the line connection between the control chamber of the control valve and the venting pressure-containing portion of the damping arrangement formed by a connected between the control room with the pressure chamber of the closing arrangement and the Anschlußleittng extending connecting channel is, and that the vent path from one of the damping chamber outgoing and over the pressure-side displacement of the closing arrangement and the control valve to the connecting line extending venting channel is closed before the start of damping by the closing arrangement against the damping chamber.
both the line connection to the control chamber of the control valve and the vent path are each connected to the connecting line.
a check valve is turned on with a directed from the control valve to the connection line forward direction.
the line connection between the control chamber of the control valve and the damping chamber having the venting pressure damping space is formed by a connecting arrangement receiving the connecting channel, and that the vent path from one outgoing from the damping chamber and the control valve to the connecting line extending venting channel exists.
the vent path is in turn connected to the connection bore, while the line connection is now connected to the initiation of the pending at the beginning of damping pressure in the control chamber of the control valve to the damping chamber.
control valve and closing arrangement are arranged in the cylinder piston of the pneumatic cylinder.
the same arrangement of control valve and closing arrangement and the same conduction paths can be made, as described for the above embodiment.
the line connection between the control chamber of the control valve and the venting pressure-containing region of the damping arrangement is formed by a connected between the control room with the pressure chamber of the closing arrangement and the recess of the cylinder piston connecting channel, and that the vent path of one of outgoing the damping chamber and via the pressure-side displacement of the closing arrangement and via the control valve into the recess of the cylinder piston extending vent channel is closed before the start of damping by the closing arrangement against the damping chamber.
the line connection between the control chamber of the control valve and the damping chamber having the venting pressure damping space is formed by a connection channel receiving the closing arrangement, and that the vent path extending from one of the damping chamber and the control valve to the recess of the cylinder piston Venting channel exists.
control piston of the control valve is arranged without a seal relative to the venting path in the valve housing of the control valve.
control piston of the control valve and the closing element of the closing arrangement are each held in a defined starting position before the start of damping by associated spring arrangements.
a defined initial position of control piston and closing element can be achieved in alternative embodiments by the involvement of controls, such as check valves or the like, in the corresponding flow paths, or by setting appropriate area ratios or the use of differential pistons or membranes.
control piston of the control valve and the closing element of the closing arrangement are each arranged in a pressure-balanced manner by arranging additional line connections before the start of damping.
a cylinder piston 13 In a both sides by cylinder cover 12 closed cylinder housing 11, a cylinder piston 13 is guided as a carrier of a mass m back and forth movable. For its movement to the left in the direction of the arrow 14, compressed air at working pressure is introduced into the cylinder interior 16 via a connection line 15 passing through the right-hand cylinder cover 12. On the opposite side of the cylinder an end position damping for the cylinder piston 13 is formed. For this purpose, a damping pin 17 projecting in the axial direction from the cylinder cover 12 into the cylinder interior 16 is formed, onto which the cylinder piston 13 ascends with a recess 18 formed in it.
a damping chamber 20 is divided between the cylinder cover 12 and the cylinder piston 13, in which the initially prevailing venting pressure increases by the further movement of the cylinder piston 13 in the direction of arrow 14, wherein the execution of the cushioning in the damping chamber 20 pending air also over a still is to be discharged to be described vent path.
FIG. 2 A first embodiment of such a venting path including a cushioning for the movement of the cylinder piston 13 is in FIG. 2 represented in which the components of the cushioning in the off FIG. 1 apparent left cylinder cover 12 are arranged.
a control valve 21 is arranged in the cylinder cover 12, in the piston chamber 22, a control piston 23 is slidably disposed.
the control piston On its one side, the control piston has a projection 24 as an end stop for its movement in the piston chamber 22.
a control chamber 25 On the opposite side of the control piston 23, a control chamber 25 is arranged as part of the piston chamber 22, will be discussed below.
a closing arrangement 26 is formed in the cylinder cover 12, with a displaceable in a displacement 27 arranged closing element 28.
a pressure chamber 29 is formed, on the one hand via a line connection 30 to the formed in the Dämpfzapfen 17 connecting line 19th connected.
the pressure chamber 29 is further connected by means of a connecting bore 31 with the Control chamber 25 of the control valve 21 is connected, wherein this connection bore 31 in a corresponding position of the closing element 28 by means of a lock element 28 formed on the closing projection 32 and a sealing region 33 formed thereon can be closed.
control piston 23 of the control valve 21 is biased by means disposed in the control chamber 25 spring 34, biased in its neutral position of the control piston 23 by the spring 34 in its end position with a stop of the projection 24 against the wall of the piston chamber 22 is.
the closing element 28 is biased by means disposed in the pressure chamber 29 of the closing assembly 26 spring 35 in its still-to-explain closing position in which the closing lug 32 of the closing element 28, the connecting hole 31 between the pressure chamber 29 and the control chamber 25 of the control valve 21 releases.
the cylinder cover 12 is finally formed of three sections 36a, b, c existing venting channel.
the first portion 36a of the damping chamber 20 in the displacement 27 of the closure assembly 26, wherein in the starting position due to the bias of the spring 35, the closing element 28 closes with a sealing region 38 formed on the displacement 27 against the first portion 36a of the venting channel, from the displacement 27 then performs a second portion 36 b of the venting channel to the control chamber 25 oppositely disposed venting chamber 37 of the control valve 21 such that the departure of the second portion 36 b from the displacement 27 of the closure assembly 26 is releasable from the closing element 28 in its displaced position.
a third section 36c of the venting channel leads from the venting chamber 37 of the control valve 21 to the connecting line 19 in the damping pin 17 such that in the starting position the outlet of the third section 36c of the Venting ducts from the venting chamber 37 covered by the control piston 23, but can be released from this in the shifted position.
the spring 35 ensures the closed position of the closing element 28 with respect to the first portion 36a of the ventilation channel. As far as equally in the control chamber 25 of the control valve 21 pending the venting pressure, it is ensured by a deliberate lack of sealing of the control piston 23 against the third portion 36c of the venting channel that connected to the connecting line 19 third section 36c of the venting channel also the venting pressure in Venting space 37 of the control valve is present, wherein the control piston 23 is held by the spring 34 acting on it in the defined starting position.
the venting pressure still present in the system at the moment of the beginning of the damping is in particular in the control chamber 25 of the control valve 21 as well as in the pressure chamber 29 of the closing arrangement 26.
the rising from the beginning of damping in the damping chamber 20 pressure now leads via first section 36a of the venting channel to pressurize the closing element 28, so that the closing element is moved to its closed position, in which its closing approach 32 with sealing region 33, the connecting hole 31 to the scatter chamber 25 of the control valve 21 closes.
the pending at the time of pressure increase in the damping chamber 20 in the control chamber 25 venting pressure is fixed as a control pressure for the control piston 23.
the second section 36b of the ventilation channel leading away from the displacement 27 of the closing arrangement 26 is released by the closing movement of the closing element 28, so that the air displaced with increasing pressure from the damping space 20 via the sections 36a, b of the ventilation channel into the venting chamber 37 of the control valve 21 occurs and here also ensures a pressure increase.
control piston 23 biasing spring 34 may be omitted if in the third section 36c of the venting channel a check valve is turned on with a directed by the control valve 21 to the connection line 19 passage direction. In this case, there is no pressure in the venting chamber 37 of the control valve 21 before the end cushioning begins, so that the control piston 23 is held in its defined venting position by the venting pressure introduced into its control chamber 25, initially blocking the third section of the venting duct extending from the venting chamber 37.
FIG. 3 illustrated embodiment differs from the Aus technologicalutigsbeispiel described above by a modified arrangement of control valve 21 and closing assembly 26 in the cylinder cover 12 and by connecting the line connection 30 between the pressure chamber 29 of the closing assembly 26 and thus also the control chamber 25 of the control valve 21 directly to the damping chamber 20th
the venting channel is no longer guided by the closing arrangement, but only one of the damping chamber 20 to the venting chamber 37 of the control valve 21 leading section 36a of the venting channel and provided by the venting chamber 37 to the connecting line 19 leading portion 36c of the damping channel.
This vent is blocked before Dampfungsbeginn by the control valve 21 and its control piston 23 substantially against the damping chamber 20, but as to FIG.
the arranged in the cylinder cover 12 closing assembly 26 is connected via a feed line 50 with the damping chamber 20.
the closing element 28 is guided in the displacement 27 of the closing arrangement 26 in a non-sealed manner, so that the air present in the damping space 20 can first flow past the closing element 28 into a line section 45 connected to the control space 25 of the control valve 21.
the closed position of the closing element 28 for completing the control chamber 25 against the damping chamber 20 is through a sealing seat 46 between the displacement 27 of the closing assembly 26 and the line section 45th formed on which the closing element 28 is seated in its closed position with the sealing region 38a formed on it.
Beitungsabites 45 soublasägig connected to the portion 36c of the vent passage, wherein in the located between the portion 36c of the vent passage and the connection of the control chamber 25 control valve 21 portion of the line section 45 sealingly connected to the closing element 28 via a rod 47 pressure piston 48 is, in turn, biased by a spring 35a in a position of the closing element 28, in which the closing element 28 is lifted from the sealing seat 46 and thus releases the flow path from the damping chamber 20 into the control chamber 25 of the control valve 21.
the closing element 28 is in turn displaced into the bearing of its sealing region 38a on the sealing seat 46, so that the pending in the control chamber 25 of the control valve 21 at the time of beginning of the damping venting pressure in the control chamber 25 is included and acts here as a fixed control pressure for the control piston 23.
the in the damping chamber 20 pressure is on the section 36a of the vent passage in the vent chamber 37 control valve 21, and as soon as the damping pressure exceeds the control pressure indicated by the venting control valve 21, the control piston 23 is moved to its position in which he the connection of the section 36e of the venting channel releases, so that the pending in the damping chamber 20 air can flow through the venting path 36a, 36c in the connecting line 19.
FIGS. 4 and 5 are the embodiments described above Figures 2 and 3 corresponding arrangements of control element 21 and Schi mananordtiung 26 including the associated line paths now from the cylinder cover 12 (FIGS. FIGS. 2, 3 ) in the cylinder piston 13 with the proviso that in the embodiment according to FIG. 2 corresponding embodiment according to FIG. 4 the conduit connection 30 as well as the third section 36c of the venting channel each end in the recess formed in the cylinder piston 13 recess 18, which is part of the running in the damping pin 17 connecting bore 19 from the start of damping circling cylinder piston 13 on the damper pin 17, via the venting of the damping chamber 20 takes place. Otherwise, the same processes happen as to FIG. 2 described.

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Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Fluid Mechanics (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Fluid-Damping Devices (AREA)
Fluid-Pressure Circuits (AREA)

EP12171413.3A 2011-06-28 2012-06-11 Cylindre pneumatique avec amortissement de fin de course à auto-ajustage Active EP2541073B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102011051400A DE102011051400B3 (de)	2011-06-28	2011-06-28	Pneumatikzylinder mit selbstjustierender Endlagendämpfung

Publications (3)

Publication Number	Publication Date
EP2541073A2 true EP2541073A2 (fr)	2013-01-02
EP2541073A3 EP2541073A3 (fr)	2016-11-02
EP2541073B1 EP2541073B1 (fr)	2020-08-05

Family

ID=46083178

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP12171413.3A Active EP2541073B1 (fr)	2011-06-28	2012-06-11	Cylindre pneumatique avec amortissement de fin de course à auto-ajustage

Country Status (3)

Country	Link
US (1)	US9080584B2 (fr)
EP (1)	EP2541073B1 (fr)
DE (1)	DE102011051400B3 (fr)

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US10822752B2 (en) *	2015-06-15	2020-11-03	Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College	Thermoplastic cellulosic fiber granules useful as infill materials for artificial turf
CN109084967A (zh) *	2017-06-14	2018-12-25	鸿富锦精密电子(天津)有限公司	推拉测试装置
CN115095576B (zh) *	2022-08-01	2025-02-11	泸州合成液压件有限公司	一种往返缓冲液压缸

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Publication number	Priority date	Publication date	Assignee	Title
AT213677B (de) *	1958-07-23	1961-02-27	Hydraulik Rochlitz Veb	Hydraulische Dämpfungseinrichtung an geradlinigen Kolbengetrieben
GB1351958A (en) *	1971-09-14	1974-05-15	Martonair Ltd	Pneumatic actuators
DE2326417C3 (de) *	1973-05-24	1980-01-10	Maschinenfabrik Glueckauf Beukenberg Gmbh & Co, 4650 Gelsenkirchen	Hydraulik-Zylinder mit Endlagendämpfung
JP2598210B2 (ja) *	1992-12-01	1997-04-09	エスエムシー株式会社	シリンダ装置
FR2781016B1 (fr) *	1998-07-08	2002-03-08	Aro	Verin a precourse d'approche et course de travail, pour la manoeuvre d'un outil
US6612410B1 (en) *	2001-10-17	2003-09-02	Yevgeny Antonovsky	High frequency shock absorber and accelerator
DE102006041707B4 (de) *	2006-05-10	2009-01-02	Tünkers Maschinenbau Gmbh	Kolben-Zylinder-Einheit (Arbeitszylinder) zum Spannen, und/oder Pressen, und/oder Fügen, und/oder Stanzen, und/oder Prägen, und/oder Lochen und/oder Schweißen, zum Beispiel unter Zwischenschaltung einer Kniehebelgelenkanordnung
EP1998054B1 (fr) *	2007-05-24	2014-08-13	Parker Origa Holding AG	Cylindre pneumatique avec amortissement à réglage automatique en position finale et procédé
US8850952B2 (en) *	2009-02-23	2014-10-07	David E. Albrecht	Cylinder phaser valves

2011
- 2011-06-28 DE DE102011051400A patent/DE102011051400B3/de active Active
2012
- 2012-06-11 EP EP12171413.3A patent/EP2541073B1/fr active Active
- 2012-06-26 US US13/533,333 patent/US9080584B2/en active Active

Also Published As

Publication number	Publication date
EP2541073B1 (fr)	2020-08-05
US9080584B2 (en)	2015-07-14
EP2541073A3 (fr)	2016-11-02
DE102011051400B3 (de)	2012-06-06
US20130001031A1 (en)	2013-01-03

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