EP1416166A1 - Vérin pneumatique avec dispositif amortisseur de fin de course - Google Patents

Vérin pneumatique avec dispositif amortisseur de fin de course Download PDF

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Publication number
EP1416166A1
EP1416166A1 EP03103653A EP03103653A EP1416166A1 EP 1416166 A1 EP1416166 A1 EP 1416166A1 EP 03103653 A EP03103653 A EP 03103653A EP 03103653 A EP03103653 A EP 03103653A EP 1416166 A1 EP1416166 A1 EP 1416166A1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
endlagengedämpfter
pneumatic cylinder
cushioning
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.)
Granted
Application number
EP03103653A
Other languages
German (de)
English (en)
Other versions
EP1416166B1 (fr
Inventor
Philippe Ducrettet
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.)
Bosch Rexroth AG
Original Assignee
Bosch Rexroth AG
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 Bosch Rexroth AG filed Critical Bosch Rexroth AG
Publication of EP1416166A1 publication Critical patent/EP1416166A1/fr
Application granted granted Critical
Publication of EP1416166B1 publication Critical patent/EP1416166B1/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
    • F15B15/20—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.
  • General are distinguished three principles of Endlagendämpfept. A first principle is used an elastomeric body to realize a simple stop cushioning. At a second principle 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.
  • 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 O-ring can be used for example in a corresponding annular groove of the socket and sealingly cooperates with the inner surface of the cylinder cover.
  • 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.
EP20030103653 2002-10-07 2003-10-02 Vérin pneumatique avec dispositif amortisseur de fin de course Expired - Lifetime EP1416166B1 (fr)

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 true EP1416166A1 (fr) 2004-05-06
EP1416166B1 EP1416166B1 (fr) 2005-12-28

Family

ID=32086853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030103653 Expired - Lifetime EP1416166B1 (fr) 2002-10-07 2003-10-02 Vérin pneumatique avec dispositif amortisseur de fin de course

Country Status (2)

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EP (1) EP1416166B1 (fr)
DE (2) DE10246766B3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
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
DE102010032359A1 (de) 2010-07-27 2012-02-02 Robert Bosch Gmbh Vorrichtung und Verfahren zur geschwindigkeitsabhängigen Endlagendämpfung eines Kolbens
US8596431B2 (en) 2007-05-24 2013-12-03 Parker Origa Holding Ag Pneumatic cylinder with a self-adjusting end position damping arrangement, and method for self-adjusting end position damping

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (7)

* Cited by examiner, † Cited by third party
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
FR2370907A1 (fr) * 1976-11-11 1978-06-09 Festo Maschf Stoll G Ensemble piston-cylindre pneumatique ou hydraulique
DE3920293A1 (de) * 1989-06-21 1991-01-10 Festo Kg Kolben-zylinder-aggregat
EP0530541A1 (fr) * 1991-09-05 1993-03-10 Hydraulik Techniek Cylindre hydraulique
US5309817A (en) * 1993-03-05 1994-05-10 Sims James O Linear brake for fluid actuator
EP1041293A2 (fr) * 1999-03-29 2000-10-04 Luciano Migliori Vérin pneumatique avec dispositif d'amortissement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9111000U1 (fr) * 1991-09-05 1991-10-17 Hydraulik Techniek, Emmen, Nl
DE29615799U1 (de) * 1996-09-11 1996-10-31 Festo Kg Vorrichtung zur Endlagendämpfung
DE29706364U1 (de) * 1997-04-10 1997-06-19 Buemach Engineering Internatio Endlagengedämpfter Arbeitszylinder
JP2002048108A (ja) * 2000-08-04 2002-02-15 Smc Corp 位置検出センサの取付構造

Patent Citations (7)

* Cited by examiner, † Cited by third party
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
FR2370907A1 (fr) * 1976-11-11 1978-06-09 Festo Maschf Stoll G Ensemble piston-cylindre pneumatique ou hydraulique
DE3920293A1 (de) * 1989-06-21 1991-01-10 Festo Kg Kolben-zylinder-aggregat
EP0530541A1 (fr) * 1991-09-05 1993-03-10 Hydraulik Techniek Cylindre hydraulique
US5309817A (en) * 1993-03-05 1994-05-10 Sims James O Linear brake for fluid actuator
EP1041293A2 (fr) * 1999-03-29 2000-10-04 Luciano Migliori Vérin pneumatique avec dispositif d'amortissement

Cited By (3)

* Cited by examiner, † Cited by third party
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
US8596431B2 (en) 2007-05-24 2013-12-03 Parker Origa Holding Ag Pneumatic cylinder with a self-adjusting end position damping arrangement, and method for self-adjusting end position damping
DE102010032359A1 (de) 2010-07-27 2012-02-02 Robert Bosch Gmbh Vorrichtung und Verfahren zur geschwindigkeitsabhängigen Endlagendämpfung eines Kolbens

Also Published As

Publication number Publication date
DE50302047D1 (de) 2006-02-02
EP1416166B1 (fr) 2005-12-28
DE10246766B3 (de) 2004-07-01

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