EP1437513A1 - Vérin à pression fluidique ayant un cylindre fendu - Google Patents

Vérin à pression fluidique ayant un cylindre fendu Download PDF

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Publication number
EP1437513A1
EP1437513A1 EP03020653A EP03020653A EP1437513A1 EP 1437513 A1 EP1437513 A1 EP 1437513A1 EP 03020653 A EP03020653 A EP 03020653A EP 03020653 A EP03020653 A EP 03020653A EP 1437513 A1 EP1437513 A1 EP 1437513A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
strip
stiffening
cross
longitudinal slot
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
EP03020653A
Other languages
German (de)
English (en)
Other versions
EP1437513B1 (fr
Inventor
Ulrich Wüstenhagen
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
Publication of EP1437513A1 publication Critical patent/EP1437513A1/fr
Application granted granted Critical
Publication of EP1437513B1 publication Critical patent/EP1437513B1/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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/082—Characterised by the construction of the motor unit the motor being of the slotted cylinder type

Definitions

  • the invention relates to a pressure medium cylinder with a in one longitudinally slotted cylinder tube longitudinally movable piston, with a through the cylinder longitudinal slot protruding piston connecting element is connected, with one the cylinder longitudinal slot on the cylinder inside tight Closing, elastically deformable sealing tape, which at the Cylinder inside adjacent band edge strips and one at least partially having embedded stiffening strips.
  • pressure medium cylinders of the cylinder tube is longitudinally movable Piston not over a frontally led out piston rod, but over the projecting through the cylinder longitudinal slot piston connecting element with the connected component to be driven.
  • the pressure cylinder can thus for relatively long strokes are designed without this one correspondingly long piston rod is required.
  • double-acting pressure medium cylinders the need for a Sealing the led out of the cylinder tube piston rod.
  • the cylinder longitudinal slot must be in the respectively pressurized Cylinder areas are sealed.
  • the purpose of serving elastic Sealing tape must withstand the internal pressures that occur.
  • the Cylinder tube is sealed at both ends by end flanges.
  • the tightly fitting on the inside of the cylinder sealing tape is in the range of Piston through an opening under the piston connection element passed through, so that the cylinder longitudinal slot in each case opened at the point is at which the piston connecting element through the cylinder longitudinal slot protrudes.
  • the elastic sealing band for higher internal cylinder pressures, is in a known pressure cylinder of the type mentioned (EP 0 260 344 A2) inserted in the sealing strip a flat stiffening strips of higher strength and at least partially embedded.
  • the stiffening strip is for Cylinder interior covered by the sealing tape.
  • On both sides of the ZylinderlNicolsschlitzes are bearing surfaces formed against the Stiffening tape is supportable.
  • the limits of the possible Pressurization of the sealing tape are in this case essentially by the Strength of the stiffening strip given.
  • the object of the invention is a pressure cylinder of the aforementioned Shape genus so that it designed for even higher internal pressure can be.
  • the curved cross-sectional design of the stiffening strip results in a higher dimensional stability and thus a higher compressive strength of the sealing strip.
  • the bending deformability of the sealing strip at the point of implementation of the piston connection element is not or only insignificantly influenced, because the curved in the stretched state stiffening strip locally takes on bending again straight in cross-section during bending.
  • the stiffening strip convexly curved in cross-section towards the cylinder interior is.
  • the increased stiffness of the stiffening strip results here by the arching effect of the convex cross-sectional shape.
  • the stiffening strip in cross-section to the cylinder interior concave is concave.
  • the concave curvature adapts to that through the Cylinder circumference predetermined curvature.
  • the cylinder tube 1 shown in Fig. 1 in a partial section of a Pressure medium cylinder has a cylinder longitudinal slot 2 at a circumferential location on.
  • a longitudinally movable in the cylinder tube 1 (not shown) piston is with a protruding through the cylinder longitudinal slot 2 piston connecting element connected.
  • an elastically deformable sealing strip. 3 made of an elastomeric material, for example polyurethane, to which the Cylinder longitudinal slot 2 tightly seals.
  • the sealing strip 3 has its wedge-shaped band edge stiffeners 4 in cross section on both longitudinal edges, the on one of the cylinder inner wall 5 to the cylinder longitudinal slot 2 sloping Sloping surface 6 abut.
  • a support surface 7 of the back of the band is supported for Transmission of the force exerted on the sealing tape 3 internal pressure forces also on this inclined surface 6 from.
  • the support surface 7 of the band back is of the adjacent band edge strip 4 separated by a longitudinal groove 8. This will be in particular, that the deformability of the wedge-shaped Tape edge strip 4 not by the on the support surfaces 7 of the sealing strip. 3 acting support forces is impaired.
  • a stiffening strip 11 is embedded, made of stiffer Material than the sealing strip 3 is, for example made of sheet metal, preferably Sheet steel.
  • the stiffening strip 11 is curved in cross section. He extends laterally approximated to the area of the support surfaces 7. A particular acting in the middle cross-sectional area on the sealing strip 3 Cylinder internal pressure is over the stiffening strip 11 laterally over the both support surfaces 7 supported on the inclined surfaces 6.
  • the stiffening strip 11 'in the embodiment 2 curved concave towards the cylinder interior in cross section. Also Here, the curvature causes an increased stiffness of the mold Stiffening strip 11 '.
  • Sealing strip 3 is the cylinder interior facing surface 12, the Mating surface for the piston seal forms, just executed. deviant thereof is in the embodiments of FIGS. 3 and 4 this Cylinder interior facing surface 12 'of the sealing strip 3 in adaptation to the cylinder radius is concave in cross-section. This will be a improved conditioning of the piston seal achieved.
  • Fig. 4 shows that by the concave curvature of the surface 12 'of the sealing strip. 3 and the concave curvature of the stiffening strip 11 'a particularly thin Execution of the sealing strip 3 can be achieved, but because of Supporting effect of the stiffening strip 11 'is nevertheless suitable, to absorb relatively high internal cylinder pressures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Tires In General (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
EP03020653A 2003-01-10 2003-09-11 Vérin à pression fluidique ayant un cylindre fendu Expired - Lifetime EP1437513B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10300600 2003-01-10
DE10300600A DE10300600B3 (de) 2003-01-10 2003-01-10 Druckmittelzylindler mit einem längsgeschlitzten Zylinderrohr

Publications (2)

Publication Number Publication Date
EP1437513A1 true EP1437513A1 (fr) 2004-07-14
EP1437513B1 EP1437513B1 (fr) 2006-06-28

Family

ID=32049659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03020653A Expired - Lifetime EP1437513B1 (fr) 2003-01-10 2003-09-11 Vérin à pression fluidique ayant un cylindre fendu

Country Status (3)

Country Link
EP (1) EP1437513B1 (fr)
AT (1) ATE331893T1 (fr)
DE (2) DE10300600B3 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4545290A (en) * 1983-12-23 1985-10-08 Tol-O-Matic, Inc. Pressure cylinder
EP0260344A2 (fr) * 1986-09-17 1988-03-23 NORGREN MARTONAIR EUROPA GmbH Cylindre pour fluide sous pression
US4829881A (en) * 1987-03-12 1989-05-16 Ckd Corporation Rod-less cylinder
EP0531131A1 (fr) * 1991-09-06 1993-03-10 Smc Corporation Vérin sans tige
US5241897A (en) * 1991-04-18 1993-09-07 Hygrama Ag Pressurized medium cylinder

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4545290A (en) * 1983-12-23 1985-10-08 Tol-O-Matic, Inc. Pressure cylinder
US4545290B1 (fr) * 1983-12-23 1993-03-30 Tol O Matic Inc
EP0260344A2 (fr) * 1986-09-17 1988-03-23 NORGREN MARTONAIR EUROPA GmbH Cylindre pour fluide sous pression
US4829881A (en) * 1987-03-12 1989-05-16 Ckd Corporation Rod-less cylinder
US5241897A (en) * 1991-04-18 1993-09-07 Hygrama Ag Pressurized medium cylinder
EP0531131A1 (fr) * 1991-09-06 1993-03-10 Smc Corporation Vérin sans tige

Also Published As

Publication number Publication date
DE50304044D1 (de) 2006-08-10
EP1437513B1 (fr) 2006-06-28
DE10300600B3 (de) 2004-04-29
ATE331893T1 (de) 2006-07-15

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