EP1918592B1 - Joint d'étanchéité avec amortisseur de fin de course, fond avec joint d'étanchéité et vérin pneumatique avec fond et joint d'étanchéité - Google Patents

Joint d'étanchéité avec amortisseur de fin de course, fond avec joint d'étanchéité et vérin pneumatique avec fond et joint d'étanchéité Download PDF

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Publication number
EP1918592B1
EP1918592B1 EP06022912A EP06022912A EP1918592B1 EP 1918592 B1 EP1918592 B1 EP 1918592B1 EP 06022912 A EP06022912 A EP 06022912A EP 06022912 A EP06022912 A EP 06022912A EP 1918592 B1 EP1918592 B1 EP 1918592B1
Authority
EP
European Patent Office
Prior art keywords
sealing
sealing ring
ring arrangement
piston
arrangement according
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.)
Active
Application number
EP06022912A
Other languages
German (de)
English (en)
Other versions
EP1918592A1 (fr
EP1918592B2 (fr
Inventor
Gonzalo Barillas
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg 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.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37891698&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1918592(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Carl Freudenberg KG filed Critical Carl Freudenberg KG
Priority to AT06022912T priority Critical patent/ATE484682T1/de
Priority to DE502006008098T priority patent/DE502006008098D1/de
Priority to EP06022912.7A priority patent/EP1918592B2/fr
Priority to TW096136999A priority patent/TW200837297A/zh
Priority to US11/982,158 priority patent/US7866252B2/en
Priority to JP2007286928A priority patent/JP4847431B2/ja
Publication of EP1918592A1 publication Critical patent/EP1918592A1/fr
Publication of EP1918592B1 publication Critical patent/EP1918592B1/fr
Priority to US12/958,859 priority patent/US8234970B2/en
Publication of EP1918592B2 publication Critical patent/EP1918592B2/fr
Application granted granted Critical
Active legal-status Critical Current
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
    • F15B15/223—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
    • 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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1438—Cylinder to end cap assemblies
    • F15B15/1442—End cap sealings

Definitions

  • the invention relates to a sealing ring arrangement with a lid and a sealing ring for a pneumatic cylinder.
  • Sealing rings that are used in pneumatic cylinders for application and seal end caps against the cylinder tube of the pneumatic cylinder, are well known, for example from the EP 1 447 571 B1 .
  • the sealing rings which seal the frontal cover in each case with respect to the cylinder tube, are formed by conventional O-rings.
  • the piston has the front side on both sides in each case a dynamically stressed seal, for mutual sealing of the acted upon by a pressure medium spaces.
  • At least partially iron metallic stop element is provided, which is fixed in a piston near basic position by the magnetic force of at least one permanent magnet on the piston and which in a piston remote working position for cushioning in the respective adjacent Protruding pressure chamber, wherein an externally arranged on the cylinder housing adjustable magnetic element for generating a relative to the magnetic field of the permanent magnet substantially inverted magnetic field is provided to achieve a change in position of the stop element from the basic position to the working position when the piston shortly before reaching the end position Magnetic element happens.
  • the previously known pneumatic cylinder has a variety of items, which is unsatisfactory in manufacturing and economic terms.
  • a generic sealing ring assembly is made FR 2658872 known.
  • the invention has for its object to further develop a sealing ring, a lid with a sealing ring and a pneumatic cylinder with cover and sealing ring such that the respective parts are simple and inexpensive to produce.
  • the sealing ring should be multifunctional with a simple structure. Due to the small number of parts, the risk of assembly errors should be reduced to a minimum.
  • the material of the sealing ring which is not the subject of the invention, can be formed by a sealing material known per se and can thus be adapted to the particular circumstances of the application,
  • the damping buffer, the static seal and the dynamic seal may be integral with each other and formed of the same material. By combining in one component, the risk of assembly errors is kept to a minimum.
  • the static seal is bead-shaped and can be snapped into a congruently formed undercut of the lid.
  • the static seal and the lid are thus captive connected to each other and form a preassembled unit that can be easily installed.
  • the sealing lip may comprise a first sealing edge, wherein the first sealing edge is sealingly applied to the cover when the sealing lip is applied to the sealing lip.
  • the sealing of the sealing edge on the lid is required for that builds up a sufficiently high pressure within the sealed space for the cushioning and then the piston moves damped in its final position until it applies to the damping buffer.
  • the sealing lip may comprise a second sealing edge which is sealingly applied to the cover when the sealing lip is applied to the sealing lip, wherein the second sealing edge of the first sealing edge is connected upstream in the direction of the pressurized cylinder tube.
  • the first sealing edge may be enclosed at a radial distance on the outside of the second sealing edge.
  • the sealing edges can limit an axially opposite the piston open, C-shaped groove.
  • the sealing lip may be bulged axially in the direction of the piston.
  • This lip design has a pressure-activating effect. The pressure-facing portion of the seal and the lid can be carried out so that no gap extrusion can occur.
  • connection opening may comprise at least one bore arranged on the front side on the circumference and, on the other hand, an annular channel on the face side which can be fluidically connected to a throttle bore in the cylinder tube.
  • the connection opening within the sealing ring can be formed immediately with the production of the sealing ring, so that it no longer requires complicated, subsequent process steps for the preparation of the connection opening.
  • the end faces of the sealing ring can be connected by a ventilation opening, wherein the ventilation opening connects the cylinder tube and the cylinder tube facing side of the second sealing edge in a flow-conducting manner.
  • the sealing lip is acted upon by the overpressure to be sealed so that the pressure on both sealing edges compensates and create these sealing and without risk of lifting on the surfaces to be sealed by damping pin and cover.
  • the medium that is sealed is air.
  • the invention relates to a sealing ring assembly with a cover for a pneumatic cylinder, which is connected to a sealing ring, as described above, and forms with this a preassemblable unit.
  • the undercut in the cover may be formed by a radially outwardly open groove in which the bead-shaped static seal is sealingly arranged.
  • FIGS. 1 to 3 show the sealing ring according to the invention, the lid according to the invention and the pneumatic cylinder in different operating states.
  • FIG. 4 Another embodiment is in Fig. 4 shown.
  • FIGS. 1 and 2 a section of a pneumatic cylinder is shown schematically. Due to the inventive design of the Sealing ring consists of the pneumatic cylinder only a few parts, which is advantageous in manufacturing technology and economic terms. The risk of assembly errors is reduced by the low-part construction.
  • the sealing ring is multifunctional and comprises a damping buffer 1, which from the piston 2, when this is in its end position ( Fig. 3 ) is touched adjacent.
  • the sealing ring has a static seal 4, with which the front side of the pneumatic cylinder arranged cover 5 is sealed relative to the cylinder tube 3.
  • the sealing ring has a dynamic seal 6 with a dynamically stressed sealing lip 7, which can be applied to the surface 8 to be sealed of the damping pin 9 ( Fig. 2 and Fig. 3 ).
  • the sealing ring has a flow-conducting connection opening 10 which connects the end faces 11, 12 of the sealing ring, wherein the connecting opening 10 in the embodiment shown here consists of a bore 16, which the piston 2 axially facing end face 11 of the sealing ring with an annular channel 17th connects, which is arranged on the cover 5 facing the end face 12 and is flow-conducting with the throttle bore 18 in communication.
  • Fig. 1 the piston 2 and the damping pin 9 are shown in a position shortly before the onset of cushioning. At the end of the stroke of the damping pin 9 dives into the dynamic seal 6 with its sealing lip 7, thereby closing off the remaining pressure chamber to be vented, which only via the connection opening 10, which consists of the bore 16 and the annular channel 17, and via the throttle bore 18 of the pneumatic cylinder can be relaxed.
  • connection opening 10 can be given, for example, by the fact that the bore 16, as described above, forms part of the sealing ring, the annular channel 17 but not in the sealing ring but in the lid 5 is located.
  • Such a design is significantly more complicated compared to the described as advantageous, since it requires a machining of the cover 5 for producing an annular channel or a precise shaping of the lid.
  • the annular channel 17, preferably as part of the sealing ring, is advantageous because it does not require the sealing ring to be positioned at an exact angular position in its installation space.
  • At least one ventilation opening 19 is provided, wherein preferably a plurality of evenly distributed in the circumferential direction arranged ventilation openings can be provided.
  • the static first seal 4 is snapped by its bead-shaped holding portion positively and sealingly into a congruently formed undercut 13 of the lid 5 and forms with this a preassembled unit.
  • the dynamic seal 6 comprises the dynamically stressed sealing lip 7, which has two sealing edges 14, 15, wherein the second sealing edge 15 shuts off the flow of air through the ventilation openings 19 during retraction into the end position.
  • the second sealing edge 15 When applied to the damping pin 9 sealing lip 7, the second sealing edge 15 is sealingly applied to the lid 5, wherein the second sealing edge 15 of the first sealing edge 14 is connected upstream in the direction of the pressurized cylinder tube 3.
  • Fig. 2 the piston 2 is shown, the end position damping has already used and the piston 2 at a significantly reduced speed in the direction of its in Fig. 3 moved shown end position.
  • Fig. 3 the piston 2 is shown in its end position on the damping buffer 1 fitting.
  • Fig. 4 a deviating embodiment is shown, in which the sealing lip 7 is bulged axially in the direction of the piston 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasket Seals (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Fluid-Damping Devices (AREA)
  • Actuator (AREA)
  • Sealing Devices (AREA)

Claims (12)

  1. Agencement de joint d'étanchéité pour un vérin pneumatique, ledit agencement de joint d'étanchéité comprenant un fond (5) et un tampon amortisseur (1) pour un piston (2) pouvant être chargé par un agent de pression, ledit piston (2) pouvant être déplacé selon un mouvement de va-et-vient axial dans un tube de vérin (3) et l'agencement de joint d'étanchéité comprenant en outre au moins un joint statique (4) pour étanchéifier le tube de vérin (3) par rapport au fond (5) relié côté frontal au tube de vérin (3) et un joint dynamique (6) doté d'au moins une lèvre d'étanchéité (7) à action dynamique pouvant être appuyée pendant l'utilisation du joint d'étanchéité contre la surface (8) à étanchéifier d'un tenon d'amortissement (9) relié au piston (2) et pouvant être déplacée selon un mouvement de va-et-vient dans le plan axial, ledit tenon d'amortissement (9) s'élargissant dans son diamètre à proximité du piston, l'agencement de joint d'étanchéité comprenant au moins une ouverture de liaison (10) conductrice reliant les faces frontales (11, 12) axiales du joint d'étanchéité, caractérisé en ce que le joint statique (4) prend la forme d'un bourrelet et s'enclipse dans une contre-dépouille (13) réalisée dans le fond (5) de façon à coïncider avec elle.
  2. Agencement de joint d'étanchéité selon la revendication 1, caractérisé en ce que le tampon amortisseur (1), le joint statique (4) et le joint dynamique (6) sont réalisés à partir du même matériau et s'encastrent en passant de l'un à l'autre d'un seul tenant.
  3. Agencement de joint d'étanchéité selon l'une quelconque des revendications 1 à 2, caractérisé en ce que la lèvre d'étanchéité (7) comprend une première arête d'étanchéité (14) et que la première arête d'étanchéité (14) appuie contre le fond (5) lorsque la lèvre d'étanchéité (7) appuie contre le tenon d'amortissement (9).
  4. Agencement de joint d'étanchéité selon la revendication 3, caractérisé en ce que la lèvre d'étanchéité (7) comprend une deuxième arête d'étanchéité (15) qui appuie de façon étanchéifiante contre le fond (5) lorsque la lèvre d'étanchéité (7) appuie contre le tenon d'amortissement (9) et que la deuxième arête d'étanchéité (15) est positionnée en amont de la première arête d'étanchéité (14) en direction du tube de vérin (3) chargé en pression.
  5. Agencement de joint d'étanchéité selon la revendication 4, caractérisé en ce que la première arête d'étanchéité (14) est entourée à une certaine distance radiale côté extérieur par la deuxième arête d'étanchéité (15).
  6. Agencement de joint d'étanchéité selon l'une quelconque des revendications 4 à 5, caractérisé en ce que les arêtes d'étanchéité (14, 15) délimitent une rainure en C ouverte dans le plan axial par rapport au piston (2).
  7. Agencement de joint d'étanchéité selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la lèvre d'étanchéité (7) est prétombée dans le plan axial en direction du piston (2).
  8. Agencement de joint d'étanchéité selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'ouverture de liaison (10) comprend au moins un alésage (16) disposé côté frontal d'un côté au niveau de la périphérie et un canal annulaire (17) disposé côté frontal de l'autre côté et pouvant être relié de façon conductrice à un alésage d'étranglement (18) dans le tube de vérin (3).
  9. Agencement de joint d'étanchéité selon la revendication 8 et l'une quelconque des revendications 4 à 6, caractérisé en ce que les côtés frontaux (11, 12) sont reliés par une ouverture d'aération (19) et que l'ouverture d'aération (19) relie de façon conductrice le tube de vérin (3) et le côté de la deuxième arête d'étanchéité (15) orientée vers le tube de vérin (3).
  10. Agencement de joint d'étanchéité, selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'air sert d'agent étanchéifiant.
  11. Agencement de joint d'étanchéité selon l'une quelconque des revendications 1 à 10, le fond étant relié au joint d'étanchéité et formant avec lui une unité prémontée.
  12. Agencement de joint d'étanchéité selon la revendication 11, caractérisé en ce que la contre-dépouille (13) est formée par une rainure ouverte vers l'extérieur dans le plan radial.
EP06022912.7A 2006-11-03 2006-11-03 Ensemble de joint d'étanchéité avec joint, amortisseur de fin de course et fond pour un vérin pneumatique Active EP1918592B2 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT06022912T ATE484682T1 (de) 2006-11-03 2006-11-03 Dichtring mit integrierter endlagendämpfung, deckel mit dichtring und pneumatikzylinder mit deckel und dichtring
DE502006008098T DE502006008098D1 (de) 2006-11-03 2006-11-03 Dichtring mit integrierter Endlagendämpfung, Deckel mit Dichtring und Pneumatikzylinder mit Deckel und Dichtring
EP06022912.7A EP1918592B2 (fr) 2006-11-03 2006-11-03 Ensemble de joint d'étanchéité avec joint, amortisseur de fin de course et fond pour un vérin pneumatique
TW096136999A TW200837297A (en) 2006-11-03 2007-10-03 Sealing ring, cap with sealing ring and pneumatic cylinder with cap and sealing ring
US11/982,158 US7866252B2 (en) 2006-11-03 2007-11-01 Gasket, cover with gasket, and pneumatic cylinder with cover and gasket
JP2007286928A JP4847431B2 (ja) 2006-11-03 2007-11-05 シールリング、シールリングを備えたキャップ並びに、キャップ及びシールリングを備えた空気圧シリンダ
US12/958,859 US8234970B2 (en) 2006-11-03 2010-12-02 Gasket, cover with gasket, and pneumatic cylinder with cover and gasket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06022912.7A EP1918592B2 (fr) 2006-11-03 2006-11-03 Ensemble de joint d'étanchéité avec joint, amortisseur de fin de course et fond pour un vérin pneumatique

Publications (3)

Publication Number Publication Date
EP1918592A1 EP1918592A1 (fr) 2008-05-07
EP1918592B1 true EP1918592B1 (fr) 2010-10-13
EP1918592B2 EP1918592B2 (fr) 2014-01-01

Family

ID=37891698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06022912.7A Active EP1918592B2 (fr) 2006-11-03 2006-11-03 Ensemble de joint d'étanchéité avec joint, amortisseur de fin de course et fond pour un vérin pneumatique

Country Status (6)

Country Link
US (2) US7866252B2 (fr)
EP (1) EP1918592B2 (fr)
JP (1) JP4847431B2 (fr)
AT (1) ATE484682T1 (fr)
DE (1) DE502006008098D1 (fr)
TW (1) TW200837297A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009014817B4 (de) 2009-03-25 2011-07-21 FESTO AG & Co. KG, 73734 Fluidbetätigter Linearantrieb
IT1401377B1 (it) * 2010-08-09 2013-07-18 Skf Ab Unita' di guida e tenuta, in particolare per uno stelo di un ammortizzatore monotubo e complesso anulare di tenuta per la stessa
TWI401376B (zh) * 2011-01-21 2013-07-11 Chime Ball Technology Co Ltd Piston airtight device
JP5793346B2 (ja) * 2011-05-31 2015-10-14 日立オートモティブシステムズ株式会社 シリンダ装置
DE102012103595B4 (de) 2012-04-24 2015-10-15 Parker Hannifin Manufacturing Germany GmbH & Co. KG Dichtungsanordnung für eine Zylinderabdichteinrichtung eines Pneumatikzylinders
CN107076304B (zh) * 2014-05-19 2018-10-09 微线科技有限责任公司 具有密封表面延伸部的环密封
CN114087360A (zh) * 2021-10-18 2022-02-25 东风汽车集团股份有限公司 一种封堵装置和零件

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100907B (de) † 1958-01-24 1961-03-02 Cie Parisienne D Outil A Air C Druckmittelbetaetigter Hebebock
BE793149A (fr) * 1971-12-27 1973-06-21 Westinghouse Bremsen Apparate Dispositif d'amortissement de fin de course
JPS57205403A (en) 1981-06-12 1982-12-16 Hitachi Ltd Formation of polymer film
JPS6128086Y2 (fr) † 1981-06-24 1986-08-21
FR2658872A1 (fr) * 1990-02-27 1991-08-30 Joucomatic Sa Perfectionnements apportes aux verins pour fluide sous pression.
DE29501243U1 (de) † 1995-01-27 1995-04-20 Festo Kg, 73734 Esslingen Arbeitszylinder
DE10305954B3 (de) 2003-02-12 2004-07-01 Rexroth Mecman Gmbh Endlagengedämpfter Pneumatikzylinder mit verstellbarer Endlagendämpfung

Also Published As

Publication number Publication date
EP1918592A1 (fr) 2008-05-07
JP4847431B2 (ja) 2011-12-28
JP2008116050A (ja) 2008-05-22
US20080122187A1 (en) 2008-05-29
US7866252B2 (en) 2011-01-11
TW200837297A (en) 2008-09-16
US8234970B2 (en) 2012-08-07
EP1918592B2 (fr) 2014-01-01
ATE484682T1 (de) 2010-10-15
US20110074114A1 (en) 2011-03-31
DE502006008098D1 (de) 2010-11-25

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