EP0080579A1 - Dispositif de freinage en fin de course d'un piston de cylindre à double effet - Google Patents

Dispositif de freinage en fin de course d'un piston de cylindre à double effet Download PDF

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Publication number
EP0080579A1
EP0080579A1 EP82109146A EP82109146A EP0080579A1 EP 0080579 A1 EP0080579 A1 EP 0080579A1 EP 82109146 A EP82109146 A EP 82109146A EP 82109146 A EP82109146 A EP 82109146A EP 0080579 A1 EP0080579 A1 EP 0080579A1
Authority
EP
European Patent Office
Prior art keywords
piston rod
pressure medium
region
sealing element
piston
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.)
Withdrawn
Application number
EP82109146A
Other languages
German (de)
English (en)
Inventor
Axel Kemner
Helmut Göttling
Rolf Heise
Werner Dannenberg
Hans-Jürgen Pfeifer
Wolf-Dietrich Kamke
Walter Ortmann
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.)
Wabco Westinghouse Steuerungstechnik and Co GmbH
Original Assignee
Wabco Westinghouse Steuerungstechnik and Co GmbH
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 Wabco Westinghouse Steuerungstechnik and Co GmbH filed Critical Wabco Westinghouse Steuerungstechnik and Co GmbH
Publication of EP0080579A1 publication Critical patent/EP0080579A1/fr
Withdrawn legal-status Critical Current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
    • F15B15/223—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 a device for the end braking of the working piston of a double-acting working cylinder according to the preamble of claim 1.
  • Such double-acting working cylinders with end deceleration are used wherever it is necessary to first transmit a rapid movement in two directions and then to decelerate the movement relatively strongly. This is e.g. B. required for automatic door locking devices.
  • a known device of the type mentioned above (door cylinder 422 802 Europe catalog from WABCOissemsen GmbH) is constructed in such a way that each chamber of the double-acting working cylinder is constantly connected to a first vent during venting and relative to each with a second vent via a valve large cross section is connectable.
  • the valve is designed and arranged such that it is automatically closed when a predetermined position of the working piston is reached, so that the chamber to be vented is then only vented via the first vent.
  • the stepwise ventilation described in the piston rod-side chamber takes place in that the piston rod is stepped, the thicker region of the piston rod facing the piston, with an intermediate wall of the cylinder, forming the desired valve for blocking the second ventilation from the piston rod side chamber.
  • the invention is therefore based on the object of providing a device of the type mentioned at the beginning in which the described extension of the cylinder is avoided with simple means.
  • the device according to the invention is characterized by a compact and short construction of the working cylinder.
  • the illustration shows a double-acting working cylinder, the piston rod of which has a polygonal profile, the piston rod forming a valve with a correspondingly designed sealing element.
  • the figure shows a double-acting working cylinder which is divided by a working piston 17 provided with a piston rod 1 into a first pressure medium chamber 13 on the piston rod side and a second pressure medium chamber 18 arranged on the other side of the working piston 17 with respect to the first pressure medium chamber 13.
  • a sealing ring 32 arranged on the circumference of the working piston 17 seals the first pressure medium chamber 13 against the second pressure medium chamber 18.
  • the piston rod 1 is of polygonal design and has a first area 15 adjoining the working piston 17 and a second area 38 with a smaller cross section with the same enveloping circle, which adjoins the first area 15.
  • a stepped bore 34, 37 is arranged coaxially to the first region 15 of the piston rod 1 in the end wall of the working cylinder on the piston rod side.
  • the bore 34, 37 serves as a feedthrough for the piston rod 1: in the stepped part 34 of the bore 34, 37 there is a first sealing element 33 which surrounds the piston rod 1 and is designed such that the piston rod 1 is only within its first region 15 seals and forms with this a valve 33, 15. Within the second region 38 of the piston rod 1, the first sealing element 33 abuts only a part of the circumference of the piston rod 1.
  • a second sealing element 36 surrounding the piston rod 1 is arranged with respect to the first sealing element 33 on the side facing away from the working piston 17 and lies against the shoulder 37 of the stepped bore 34, 37.
  • the second sealing element 36 is designed and arranged in such a way that it seals the piston rod 1 both within its first region 15 and within its second region 38.
  • To enable by the second sealing element 36 this is designed so that it does not rest with its entire width on the circumference of the second region 38 of the piston rod 1, which is smaller in cross section, but only with an elastically deformable, lip-shaped part 3.
  • the part with a smaller diameter the stepped bore 34, 37 is adapted to the diameter of the first region 15 of the piston rod 1, so that there is a gap 2 between the piston rod bushing and the second region 38 of the piston rod 1, which is, however, sealed by the lip-shaped part 3 of the second sealing element 36, so that the pressure medium cannot escape through the gap 2 to the atmosphere from the piston rod-side pressure medium chamber 13.
  • the two sealing elements 36 and 33 enclose a valve chamber 35 formed from the stepped part 34 of the bore 34, 37.
  • a pressure medium connection 10 or 19 is provided on each of the two end walls of the working cylinder.
  • the two pressure medium connections 10, 19 are connected to a pressure medium source via a multi-way valve (not shown).
  • the pressure medium connection 10 is part of a quick exhaust valve, which has a sealing seat 9, an outlet seat 7 and a cantilevered valve closure member 8.
  • the pressure medium connection 19 is part of a quick exhaust valve, which has a sealing seat 20, an outlet seat 22 and a cantilevered valve closure member 21. Both quick exhaust valves 7, 8, 9 and 20, 21, 22 each have a pressure medium outlet 6 and 23 leading to the atmosphere.
  • the quick exhaust valve 7, 8, 9 assigned to the piston rod-side pressure medium chamber 13 is connected to the valve chamber 35 via a channel 4.
  • a throttle bore 11 serving as a bypass leads from the channel 4 to the pressure medium chamber 13.
  • the cross section of the throttle bore 11 can be changed by means of an adjusting screw 5.
  • the first region 15 of the piston rod 1 has a bore 30 which runs in the axial direction, penetrates the working piston 17 and is enclosed in its free end region by a sealing ring 31, which bore 30 cooperates in a plug-like manner with a mandrel 28 arranged on the end face closing the second pressure medium chamber 18 of the working cylinder.
  • the mandrel 28 has a longitudinal bore 29 through which the second pressure medium chamber 18 can be connected to a channel 24 and further to the pressure medium outlet 23 of the quick exhaust valve 20, 21, 22 leading to the atmosphere.
  • a throttle bore 26 establishes a permanent connection between the second pressure medium chamber 18 and the channel 24.
  • the cross section of the throttle bore 26 can be changed by means of an adjusting screw 25.
  • the working cylinder has a fastening eyelet 27 on its right end.
  • first pressure medium chamber 13 of the working cylinder is vented and the second pressure medium chamber 18 of the working cylinder is vented, so that the working piston 17 is in its right end position.
  • the mandrel 28 is received by the bore arranged in the first region 15 of the piston rod 1.
  • Pressure medium is present at the connection 10 of the quick exhaust valve 7, 8, 9 belonging to the first pressure medium chamber 13 and in the first pressure medium chamber 13.
  • the valve closure body 8 of the quick exhaust valve 7, 8, 9 is held by the pressure medium at the pressure medium connection 10 on the outlet seat 7, so that the pressure medium cannot escape from the first pressure medium chamber 13 via the pressure medium outlet 6.
  • the multi-way valve also not shown, which is arranged between the pressure medium source, not shown, and the pressure medium connections 10, 19 is switched over.
  • the second pressure medium chamber 18 is vented via the pressure medium connection 19, the quick exhaust valve 20, 21, 22 and the channel 24, the throttle bore 26 and the bore 29. At the same time, the pressure medium line leading to the pressure medium connection 10 is vented.
  • the pressure medium inlet (pressure medium connection 10) is now closed and the pressure medium outlet 6 is open.
  • the pressure medium from the first pressure medium chamber 13 quickly escapes to the atmosphere. If the piston rod 1 is extended so far from the working cylinder that the first region 15 of the piston rod 1 dips into the sealing element 33, so that the gap 12 between the first sealing element 33 and the piston rod 1 is closed, the pressure medium displaced from the first pressure medium chamber 13 arrives now only via the throttle bore 11 to the pressure medium outlet 6 of the quick exhaust valve 7, 8, 9.
  • the first region 15 of the piston rod 1 deforms the lip-shaped part 3 of the second sealing element 36 serving as a piston rod guide in the axial and radial direction and emerges from the working cylinder.
  • the pressure medium connection 10 of the quick exhaust valve 7, 8, 9 is connected to the pressure medium source and the line leading to the pressure medium connection 19 is vented. Due to the force of the pressure medium, the valve closure body 8 of the quick exhaust valve 7, 8, 9 is lifted off the sealing seat 9 and pressed against the outlet seat 7. The pressure medium flowing into the channel 4 through the quick exhaust valve 7, 8, 9 passes through the throttle bore 11 into the first pressure medium chamber 13, whereby a displacement of the working piston 17 in the direction of the second pressure medium chamber 18 is brought about. As soon as the first region of the piston rod 1 serving as the valve body has emerged from the first sealing element 33, the first pressure medium chamber 13 is additionally ventilated via the valve chamber 35 and the gap 12.
  • the pressure in the second pressure medium chamber 18 is first quickly reduced via the bore 29 provided in the mandrel 28 and the throttle bore 26 and the pressure medium outlet 23. As soon as the mandrel 28 is received by the bore 30 arranged in the working piston 17 and in the first region 15 of the piston rod 1, the pressure medium can only escape from the second pressure medium chamber 18 via the throttle bore 26. Consequently, the working piston 17 now slows down to its right end position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
EP82109146A 1981-11-26 1982-10-04 Dispositif de freinage en fin de course d'un piston de cylindre à double effet Withdrawn EP0080579A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3146845 1981-11-26
DE19813146845 DE3146845A1 (de) 1981-11-26 1981-11-26 Einrichtung zur endabbremsung des arbeitskolbens eines doppeltwirkenden arbeitszylinders

Publications (1)

Publication Number Publication Date
EP0080579A1 true EP0080579A1 (fr) 1983-06-08

Family

ID=6147237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82109146A Withdrawn EP0080579A1 (fr) 1981-11-26 1982-10-04 Dispositif de freinage en fin de course d'un piston de cylindre à double effet

Country Status (2)

Country Link
EP (1) EP0080579A1 (fr)
DE (1) DE3146845A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199556A1 (fr) * 1985-04-20 1986-10-29 Colt International Limited Vérin pneumatique
FR2641342A1 (fr) * 1989-01-04 1990-07-06 Roux Roger Verin d'actionnement a fluide
EP0450518A1 (fr) * 1990-04-05 1991-10-09 Knorr-Bremse Ag Vérin à air comprimé
EP0622331A1 (fr) * 1993-03-19 1994-11-02 FIAT OM CARRELLI ELEVATORI S.p.A. Unité de levage pour les fourches de chariots élévateurs
GB2282414A (en) * 1993-08-25 1995-04-05 Blatchford & Sons Ltd Artificial limb component
WO2011085283A1 (fr) 2010-01-11 2011-07-14 Faro Technologies, Inc. Procédé et appareil pour la synchronisation de mesures effectuées par de multiples dispositifs de métrologie

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29615799U1 (de) * 1996-09-11 1996-10-31 Festo Kg, 73734 Esslingen Vorrichtung zur Endlagendämpfung
TW468005B (en) * 1998-11-06 2001-12-11 Smc Corp Pneumatic cylinder with cushion mechanism
JP3469525B2 (ja) * 2000-03-03 2003-11-25 Ｓｍｃ株式会社 クッション機構付空気圧ロータリアクチュエータ
DE202004011993U1 (de) * 2004-07-30 2005-12-08 Liebherr-Werk Nenzing Ges.M.B.H. Kolben-/Zylindereinheit
CN106224325A (zh) * 2016-08-25 2016-12-14 北汽福田汽车股份有限公司 柱塞缸、泵送系统摆阀机构和混凝土泵送设备

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH448645A (de) * 1965-12-13 1967-12-15 Festo Maschf Stoll G Arbeitszylinder mit einem hin und her gehenden Kolben

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6942419U (de) * 1969-10-31 1970-05-21 Kiekert Soehne Pneumatischer stellantrieb.
DE2355593C3 (de) * 1973-11-07 1979-08-09 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Arbeitszylinder zum Ausführen einer jeweils im Bereich der Endlagen gedämpften Arbeitskolbenbewegung
DE2519251A1 (de) * 1975-04-30 1976-11-11 Reinhold Pilzecker Arbeitsgeraet, bestehend aus kolbenstange und zylinder
DE2851291A1 (de) * 1978-11-27 1980-06-12 Wabco Fahrzeugbremsen Gmbh Daempfungseinrichtung zur endabbremsung von kolben

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH448645A (de) * 1965-12-13 1967-12-15 Festo Maschf Stoll G Arbeitszylinder mit einem hin und her gehenden Kolben

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EUROPA-KATALOG DER FIRMA WABCO FAHRZEUGBREMSEN, Januar 1979, "Türzylinder 422 802" *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199556A1 (fr) * 1985-04-20 1986-10-29 Colt International Limited Vérin pneumatique
FR2641342A1 (fr) * 1989-01-04 1990-07-06 Roux Roger Verin d'actionnement a fluide
EP0377529A1 (fr) * 1989-01-04 1990-07-11 Roger Roux Vérin d'actionnement à fluide
EP0450518A1 (fr) * 1990-04-05 1991-10-09 Knorr-Bremse Ag Vérin à air comprimé
EP0622331A1 (fr) * 1993-03-19 1994-11-02 FIAT OM CARRELLI ELEVATORI S.p.A. Unité de levage pour les fourches de chariots élévateurs
GB2282414A (en) * 1993-08-25 1995-04-05 Blatchford & Sons Ltd Artificial limb component
WO2011085283A1 (fr) 2010-01-11 2011-07-14 Faro Technologies, Inc. Procédé et appareil pour la synchronisation de mesures effectuées par de multiples dispositifs de métrologie

Also Published As

Publication number Publication date
DE3146845A1 (de) 1983-06-01

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19830421

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: WABCO WESTINGHOUSE STEUERUNGSTECHNIK GMBH & CO.

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850319

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ORTMANN, WALTER

Inventor name: PFEIFER, HANS-JUERGEN

Inventor name: KAMKE, WOLF-DIETRICH

Inventor name: DANNENBERG, WERNER

Inventor name: HEISE, ROLF

Inventor name: KEMNER, AXEL

Inventor name: GOETTLING, HELMUT