EP2107256A1 - Vérin pneumatique à fin de course amortie - Google Patents

Vérin pneumatique à fin de course amortie Download PDF

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Publication number
EP2107256A1
EP2107256A1 EP08006335A EP08006335A EP2107256A1 EP 2107256 A1 EP2107256 A1 EP 2107256A1 EP 08006335 A EP08006335 A EP 08006335A EP 08006335 A EP08006335 A EP 08006335A EP 2107256 A1 EP2107256 A1 EP 2107256A1
Authority
EP
European Patent Office
Prior art keywords
piston
seal
cylinder housing
pneumatic cylinder
endlagengedämpfter
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.)
Ceased
Application number
EP08006335A
Other languages
German (de)
English (en)
Inventor
Gonzalo Barillas
Harmut Näser
Patrick Kinsch
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
Application filed by Carl Freudenberg KG filed Critical Carl Freudenberg KG
Priority to EP08006335A priority Critical patent/EP2107256A1/fr
Publication of EP2107256A1 publication Critical patent/EP2107256A1/fr
Ceased 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
    • 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
    • F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads

Definitions

  • Pneumatic cylinders of this type consist of a cylinder housing in which a double-acting piston is housed axially movable.
  • the piston has sealing elements for sealing against the inner cylinder wall and stop elements for damping the end stop of the piston.
  • the stop elements are mounted on both sides of the piston.
  • magnetic elements On the outer wall of the cylinder housing magnetic elements may be mounted, which cooperate energized with the permanent magnets located on the piston and are used for position sensing of the piston.
  • Pneumatic cylinders of comparable design are also the DE 37 38 151 A1 and the DE 43 20 840 C1 refer to.
  • the sealing of the piston with respect to the inner cylinder wall can be done in various ways. Here are seals like those in the EP 0 660 015 B1 or the EP 1 847 736 A1 are shown to be advantageous.
  • the invention has for its object to provide an endlagengedämpften pneumatic cylinder with piston acted upon on both sides, which is as simple and inexpensive to produce, has a small number of components, allows a long period of operation and can be used very versatile.
  • the piston accommodated in the cylinder housing is therefore provided with only a double-acting seal, which is effective in both directions of the piston movement.
  • the seal is floatingly mounted in a piston groove on the circumference of the piston.
  • the piston has on its outer side a permanent magnet, which cooperates with a plurality of externally arranged on the cylinder housing measuring sensors, the latter recognize the position of the piston and pass it on to a display device.
  • the damping buffers for the end positions of the piston are attached to the covers of the cylinder housing, in such a way that they provide both a static seal to the cylinder housing and a dynamic seal against the piston rod.
  • Such a constructed pneumatic cylinder with cushioning of the piston is very simple and inexpensive in construction and can be used in a very diverse manner.
  • the gasket inserted in the piston is substantially T-shaped as seen in section, with the head bar of the T resting against the inner cylinder wall and providing a good seal in both directions of movement of the piston.
  • This seal also has a static sealing member which bears against the side walls of the groove in which the seal is housed.
  • the dynamic sealing part is formed by the head bar of the T * s.
  • the arranged on the outside of the cylinder housing measuring sensors can be changed in their position. They are mounted axially displaceable on the outside of the cylinder housing and can be locked in the desired position.
  • the damping buffers are connected to the covers of the cylinder housing and consist of an elastomeric material. They are also provided with passage openings, which are arranged cooperating with throttle bores in the covers of the cylinder housing.
  • the piston is provided on its outer surface with a guide ring made of a polymer which is designed to receive lateral forces and deflections. Such a guide ring is unnecessary if the piston itself is made of a polymer.
  • Fig. 1 is very schematically illustrated a Endlagengedämpfter pneumatic cylinder 1 with the essential parts of the invention.
  • the piston 3 is housed, which is held on the piston rod 4.
  • the double-acting seal 6 and the permanent magnet 7 is accommodated in corresponding grooves arranged on the circumference of the piston 3.
  • the cylinder housing 2 is provided with the covers 8 and 9, on which the damping buffers 10 and 11 are mounted for the piston 3.
  • the damping buffers 10 and 11 form with their outer edges 12, 13 static seals to the cylinder housing 2, while they form with their inner edges 14, 15, the dynamic seals against the piston rod 4.
  • a plurality of measuring sensors 17 are mounted, which detect the magnetic field of the permanent magnet 7 and in this way recognize the position of the piston 3. They measuring sensors 17 are connected to a not-known display, not shown, which indicates the position of the piston.
  • the guide ring 18 is made of a polymer with good sliding properties. This is favorable if the piston 3 itself consists of a metal.
  • the T-shaped seal 6 has the sealing part 19, which bears against the inner side 20 of the cylinder housing 2 and results in the dynamic seal.
  • the statistical seal is formed by the sealing member 21 which rests against the side walls 22, 23 of the groove 24.
  • the permanent magnet 7 is housed in the separate groove 22 and has a slight distance to Inner side 20 of the cylinder housing 2. At the permanent magnet 7, the guide ring 18 connects.
  • the throttle bore 26 is present, which connects to the passage opening 27 in the damping buffer 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
EP08006335A 2008-03-31 2008-03-31 Vérin pneumatique à fin de course amortie Ceased EP2107256A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08006335A EP2107256A1 (fr) 2008-03-31 2008-03-31 Vérin pneumatique à fin de course amortie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08006335A EP2107256A1 (fr) 2008-03-31 2008-03-31 Vérin pneumatique à fin de course amortie

Publications (1)

Publication Number Publication Date
EP2107256A1 true EP2107256A1 (fr) 2009-10-07

Family

ID=39709123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08006335A Ceased EP2107256A1 (fr) 2008-03-31 2008-03-31 Vérin pneumatique à fin de course amortie

Country Status (1)

Country Link
EP (1) EP2107256A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012103595A1 (de) 2012-04-24 2013-10-24 Parker Hannifin Manufacturing Germany GmbH & Co. KG Dichtungsanordnung für eine Zylinderabdichteinrichtung
CN104154067A (zh) * 2014-07-25 2014-11-19 宁波索诺工业自控设备有限公司 气缸

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738151A1 (de) 1986-11-13 1988-05-26 Ckd Corp Kolbenpositionsdetektor fuer druckmittelzylinder
FR2658872A1 (fr) * 1990-02-27 1991-08-30 Joucomatic Sa Perfectionnements apportes aux verins pour fluide sous pression.
DE4320840C1 (de) 1993-06-23 1994-12-15 Freudenberg Carl Fa Dichtung für einen pneumatisch angetriebenen Kolben
EP0660015B1 (fr) 1993-12-22 1998-05-13 Firma Carl Freudenberg Dispositif d'étanchéité pour deux pièces de machine mobiles en translation l'une relativement par rapport à l'autre
EP1528266A1 (fr) * 2003-11-03 2005-05-04 Rexroth Mecman GmbH Joint d'étanchéité pour tube cylindrique et piston
EP1447571B1 (fr) 2003-02-12 2005-09-07 Rexroth Mecman GmbH Cylindre à amortissement de fin de course réglable
EP1847736A1 (fr) 2006-04-19 2007-10-24 Carl Freudenberg KG Dispositif d'étanchéité

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3738151A1 (de) 1986-11-13 1988-05-26 Ckd Corp Kolbenpositionsdetektor fuer druckmittelzylinder
FR2658872A1 (fr) * 1990-02-27 1991-08-30 Joucomatic Sa Perfectionnements apportes aux verins pour fluide sous pression.
DE4320840C1 (de) 1993-06-23 1994-12-15 Freudenberg Carl Fa Dichtung für einen pneumatisch angetriebenen Kolben
EP0660015B1 (fr) 1993-12-22 1998-05-13 Firma Carl Freudenberg Dispositif d'étanchéité pour deux pièces de machine mobiles en translation l'une relativement par rapport à l'autre
EP1447571B1 (fr) 2003-02-12 2005-09-07 Rexroth Mecman GmbH Cylindre à amortissement de fin de course réglable
EP1528266A1 (fr) * 2003-11-03 2005-05-04 Rexroth Mecman GmbH Joint d'étanchéité pour tube cylindrique et piston
EP1847736A1 (fr) 2006-04-19 2007-10-24 Carl Freudenberg KG Dispositif d'étanchéité

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012103595A1 (de) 2012-04-24 2013-10-24 Parker Hannifin Manufacturing Germany GmbH & Co. KG Dichtungsanordnung für eine Zylinderabdichteinrichtung
EP2657541A2 (fr) 2012-04-24 2013-10-30 Parker Hannifin Manufacturing Germany GmbH & Co. KG Agencement d'étanchéité pour un système d'étanchéification de cylindre
DE102012103595B4 (de) * 2012-04-24 2015-10-15 Parker Hannifin Manufacturing Germany GmbH & Co. KG Dichtungsanordnung für eine Zylinderabdichteinrichtung eines Pneumatikzylinders
CN104154067A (zh) * 2014-07-25 2014-11-19 宁波索诺工业自控设备有限公司 气缸

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