EP0097751A1 - Druckluftzylinder mit Geschwindigkeitssteuerung - Google Patents

Druckluftzylinder mit Geschwindigkeitssteuerung Download PDF

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Publication number
EP0097751A1
EP0097751A1 EP82401722A EP82401722A EP0097751A1 EP 0097751 A1 EP0097751 A1 EP 0097751A1 EP 82401722 A EP82401722 A EP 82401722A EP 82401722 A EP82401722 A EP 82401722A EP 0097751 A1 EP0097751 A1 EP 0097751A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
conduit
bore
needle
interior
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Withdrawn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
EP82401722A
Other languages
English (en)
French (fr)
Inventor
Robert Andrieu
Gérard Canu
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.)
Compagnie Parisienne dOutillage a Air Comprime SA
Original Assignee
PARISIENNE OUTILLAGE
Compagnie Parisienne dOutillage a Air Comprime SA
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 PARISIENNE OUTILLAGE, Compagnie Parisienne dOutillage a Air Comprime SA filed Critical PARISIENNE OUTILLAGE
Publication of EP0097751A1 publication Critical patent/EP0097751A1/de
Withdrawn legal-status Critical Current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 present invention relates to a pneumatic cylinder whose displacement speed of the rod can be adjustable.
  • An object of the present invention is to provide a pneumatic cylinder whose stroke speed can be adjustable and which does not have the drawbacks mentioned above.
  • the invention relates to a pneumatic cylinder with adjustable operating speed comprising a cylinder, a piston, two end bottoms and in each bottom a bore for the supply and the exhaust, characterized in that at least the one of said bores communicates with the interior of the cylinder by a conduit partially closable by a needle.
  • the needle is screwed into a threaded hole in the bottom.
  • the conduit comprises a first portion in the extension of the bore communicating with the interior of the cylinder and a second portion substantially at right angles opening into the bore.
  • the conduit communicates with the interior of the cylinder by opening into a damping chamber formed in the bottom of the cylinder, said chamber cooperating with a dash-pot.
  • the jack comprises a needle partially closing a conduit formed in the bottom and connecting the internal face of the bottom with the interior of the damping chamber.
  • the piston represented in the figures comprises a cylinder 1 two bottoms 2 and 3 secured to the bottoms by tie rods, 4, 5, 6 and 7. Inside the cylinder slides a piston 8 displacing a rod 9 of which one end 10 crosses the background 2.
  • the invention is described with reference to a jack whose rod comes out only on one side, but it applies of course to a jack whose rod emerges at each end of the jack.
  • Each bottom has a bore intended to be connected to a supply line of air or compressed gas, and thus serving for the exhaust; these bores 21, 22 in conventional cylinders, respectively open into cylindrical chambers 31, 32 formed in the bottoms and into which dash pots 41, 42 can engage for the damping of the mobile equipment. As will be seen later, according to the present invention, the bores 21 and 22 do not communicate directly with the chambers.
  • Each bottom is fitted with a make-up valve.
  • valve with ball (51, 61) and spring (52, 62) allows thanks to the conduits 53, 63 (towards the cylinder) and the conduits 54, 64 (towards the chambers 31, 32) to put the pressure on the piston on one side and avoid exhaust on the other, and vice versa.
  • References 55 and 65 designate plugs for closing the valve bores.
  • one of the bottoms of the jack is provided a device for adjusting the speed of movement of the piston when the latter moves in the direction which brings it closer to said bottom. It is here the bottom 2 which is provided with such a device, making it possible to adjust the speed of the piston when the latter moves from right to left by looking at the figures.
  • each of the two bottoms is provided with the same device if it is desired to adjust the speed of the piston for its two directions of movement;
  • the speed adjusting device associated with the bottom 1 comprises a needle 70 whose end 71 opens into a conduit 75A - 75B connecting the supply-exhaust bore 21 to the internal chamber 31 of the jack .
  • the conduit 75A - 75B consists of two bores substantially at right angles, one 75A in the extension of the bore 72, the other 75B opening on one side of the bottom 2.
  • the end 71 of the needle 70 more or less closes the conduit 75A, and creates a pressure drop which limits the speed of escape of the air or gas and consequently, the speed of the movable member of the jack.
  • This pressure drop is adjustable by pressing the needle more or less large, which is screwed into a threaded bore 72 and opens outside the bottom 2 on one of its sides.
  • a seal 73 and a needle stop plate 74 complete the device. It is found that the adjustment device is simple and makes it possible to adjust the speed of the piston by simple rotation of the head of the needle accessible from the outside. No member protrudes from the bottom of the jack, which allows a very significant saving of space, in particular allowing the stacking of several jacks.
  • This system comprises a conduit 80 pierced in the bottom 2 parallel to the axis of the piston and opens into a bore 81 partially closed by a needle 82 accessible on one of the sides of the bottom.
  • the conduit 80 is extended by a conduit 84 which opens into the interior of the chamber 31.
  • the air path is represented by arrows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Fluid-Damping Devices (AREA)
EP82401722A 1982-06-29 1982-09-23 Druckluftzylinder mit Geschwindigkeitssteuerung Withdrawn EP0097751A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8211381A FR2529265B1 (fr) 1982-06-29 1982-06-29 Verin pneumatique a vitesse de fonctionnement reglable
FR8211381 1982-06-29

Publications (1)

Publication Number Publication Date
EP0097751A1 true EP0097751A1 (de) 1984-01-11

Family

ID=9275505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401722A Withdrawn EP0097751A1 (de) 1982-06-29 1982-09-23 Druckluftzylinder mit Geschwindigkeitssteuerung

Country Status (3)

Country Link
EP (1) EP0097751A1 (de)
ES (1) ES275448Y (de)
FR (1) FR2529265B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009016198A1 (de) * 2009-04-03 2010-10-07 Festo Ag & Co. Kg Fluidbetätigter Linearantrieb mit Endlagendämpfung
EP2107257A3 (de) * 2008-03-31 2012-12-26 FESTO AG & Co. KG Fluidbetätigter Arbeitszylinder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833312A (en) * 1955-10-26 1958-05-06 Flick Reedy Corp Orificed fluid flow controller
GB1036498A (en) * 1963-12-30 1966-07-20 Pneumatic Hydraulic Dev Compan Fluid power cylinder
FR1472663A (fr) * 1966-03-25 1967-03-10 Festo Maschf Stoll G Vérin à simple effet pour fluides pneumatiques sous pression

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2833312A (en) * 1955-10-26 1958-05-06 Flick Reedy Corp Orificed fluid flow controller
GB1036498A (en) * 1963-12-30 1966-07-20 Pneumatic Hydraulic Dev Compan Fluid power cylinder
FR1472663A (fr) * 1966-03-25 1967-03-10 Festo Maschf Stoll G Vérin à simple effet pour fluides pneumatiques sous pression

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2107257A3 (de) * 2008-03-31 2012-12-26 FESTO AG & Co. KG Fluidbetätigter Arbeitszylinder
DE102009016198A1 (de) * 2009-04-03 2010-10-07 Festo Ag & Co. Kg Fluidbetätigter Linearantrieb mit Endlagendämpfung
DE102009016198B4 (de) * 2009-04-03 2013-01-17 Festo Ag & Co. Kg Fluidbetätigter Linearantrieb mit Endlagendämpfung

Also Published As

Publication number Publication date
ES275448Y (es) 1984-10-01
ES275448U (es) 1984-03-01
FR2529265A1 (fr) 1983-12-30
FR2529265B1 (fr) 1985-06-28

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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 BE CH DE FR GB IT LI LU NL SE

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

Owner name: COMPAGNIE PARISIENNE D'OUTILLAGE A AIR COMPRIME SO

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: 19841228

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CANU, GERARD

Inventor name: ANDRIEU, ROBERT