EP0508973B2 - Zylinder-Kolben-Stelleinrichtung - Google Patents

Zylinder-Kolben-Stelleinrichtung Download PDF

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Publication number
EP0508973B2
EP0508973B2 EP19920850083 EP92850083A EP0508973B2 EP 0508973 B2 EP0508973 B2 EP 0508973B2 EP 19920850083 EP19920850083 EP 19920850083 EP 92850083 A EP92850083 A EP 92850083A EP 0508973 B2 EP0508973 B2 EP 0508973B2
Authority
EP
European Patent Office
Prior art keywords
cylinder tube
end wall
piston
cylinder
peripheral
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.)
Expired - Lifetime
Application number
EP19920850083
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English (en)
French (fr)
Other versions
EP0508973A1 (de
EP0508973B1 (de
Inventor
Folke Lennart Röllgardh
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.)
Parker Hannifin AB
Original Assignee
Parker Hannifin AB
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
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Application filed by Parker Hannifin AB filed Critical Parker Hannifin AB
Publication of EP0508973A1 publication Critical patent/EP0508973A1/de
Publication of EP0508973B1 publication Critical patent/EP0508973B1/de
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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
    • F15B15/14—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

Definitions

  • the invention relates to a piston-cylinder type actuator in which a cylinder tube is fitted with at least one end wall which at least partly is received in the cylinder tube.
  • end walls to cylinder tubes in actuators usually comprise bolt joints, either short bolts extending through flanges on the cylinder tube and the end walls or tension rods bridging both end walls and the entire length of the cylinder tube.
  • Other common end wall mountings comprise mating threads cut directly on the cylinder tube and on the end walls, or lock rings securing the end walls relative to the cylinder tube.
  • This known device comprises not only a machined weakened portion of the cylinder tube but requires at least two assembling steps.
  • the main object of the invention is to create an end wall mounting method and a piston-cylinder type actuator by which the end wall and cylinder tube design as well as the assembly work is substantially simplified and, thereby, less costly.
  • Fig 1 shows a longitudinal section through a piston-cylinder type actuator according to the invention.
  • Figs 2a-c illustrate in three steps the end wall mounting method according to the invention.
  • Fig 3 shows the completed end wall mounting carried through as illustrated in Figs 2a-c.
  • Fig 4 shows an enlarged fraction of Fig 3.
  • Fig. 5 shows an end view of the device in Fig 3
  • the actuator shown in Fig 1 comprises a cylinder tube 10 with pressure medium communication ports 11, 12 and two end walls 13, 14.
  • One of the end walls 14 has a central opening 16 through which a piston rod 17 extends.
  • the latter has a threaded bore 18 at its outer end for connection to an external load and a threaded inner portion 19 by which a piston 20 is rigidly attached.
  • the piston 20 carries both a seal ring 22 and guide elements 23 for contact with the cylindrical inner surface 24 of the cylinder tube 10.
  • a seal ring 25 is mounted in the end wall opening 16 to sealingly cooperate with the piston rod 17.
  • a coil spring 27 is inserted between the front end wall 14 and the piston 20 to exert a bias load on the latter towards the rear end wall 13.
  • the end walls 13, 14 are formed with circumferential grooves 28 and 29, respectively, for supporting seal rings 30, 31.
  • the end walls 13, 14 are also formed with circumferential mounting grooves 33, 34, which are engaged by lock lugs 35, 36 extending radially inwardly from the inner surface 24 of the cylinder tube 10.
  • the lugs 35, 36 which extend throughout the inner circumference of the cylinder tube 10, are formed by plastic deformation of the latter and form together with the grooves 33, 34 a rigid and permanent mounting means for the end walls 13, 14. Thereby, the flat end surfaces 37, 38 of the end walls 13, 14 are flush with the end surfaces of the cylinder tube 10.
  • the end wall mounting is carried out by means of a mounting tool 40 which serves both as an end wall guiding and introduction means and as a cylinder tube upsetting pressing tool.
  • the tool 40 is formed with a flat front surface 41 and an annular ridge 42 of substantially rectangular cross section and protruding in front of the front surface 41.
  • This ridge 42 has an inner diameter to fit the outside surface 37 of the end wall 13, and the axial extent of the ridge 42 is equal to the distance between the outer end surface 37 of the end wall 13 and the mounting groove 33.
  • the width of the ridge 42 is chosen so as to generate a lug 35 of a correct size to match the groove 33 when pressed against and into the end surface of the cylinder tube 10.
  • the deformation ridge 42 engages the end surface portion 43 of the cylinder tube 10 located at the inner circumference of the latter. See Fig 2b.
  • the embodiments of the invention are not limited to the above described example which includes the formation of a single annular lock lug 35 extending over the entire circumference of the cylinder tube 10.
  • the lock means may comprise a number of shorter lugs distributed over the circumference of the cylinder tube 10, and the mounting groove 33 may as well be replaced by a number of shorter grooves to match the lugs.
  • the mounting tool 40 is formed with a number of short ridge portions for producing such lugs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Claims (5)

  1. Verfahren zum starren Befestigen einer Stirnwand (13, 14) an einem Zylinderrohr (10) eines Kolben-Zylinder-Stellgliedes, bei welchem die Stirnwand (13, 14) wenigstens teilweise in dem Zylinderrohr (10) aufgenommen und mit einer oder mehreren Umfangsnuten (33, 34) ausgebildet wird, gekennzeichnet durch einen einstufigen Verfahrensschritt, in welchem die Stirnwand (13, 14) unter gleichzeitiger Anwendung einer Druckkraft (F) auf einen oder mehrere Bereiche (43) am inneren Umfang der betreffenden Stirnfläche des Zylinderrohrs (10) in dieses eingeführt wird, um durch plastische Deformation des Bereiches bzw. der Bereiche (43) eine oder mehrere radial nach innen weisende Vorsprünge (35, 36) zum verriegelnden Eingreifen in die Umfangsnut bzw. -nuten (33, 34) in der Stirnwand (13, 14) auszuformen.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Stirnwand (13, 14) in das Zylinderrohr (10) mittels eines Montagewerkzeuges (40) eingeführt wird, das mit Verformungsmitteln (42) zum gleichzeitigen Angreifen und Verformen der Stirnflächenbereiche (43) ausgebildet ist.
  3. Kolben-Zylinder-Stellglied mit einem Zylinderrohr (10), einem Kolben (20), der in dem Zylinderrohr (10) hin- und hergehend geführt ist, und wenigstens einer Stirnwand (13, 14), die jeweils eine äußere Stirnfläche (37, 38) besitzt und zumindest teilweise in dem Zylinderrohr (10) aufgenommen ist, wobei das Zylinderrohr (10) einen oder mehrere radial nach innen weisende Umfangsvorsprünge (35, 36) aufweist, der bzw. die im Wege plastischer Deformation eines oder mehrerer Bereiche (43) der betreffenden Stirnfläche des Zylinderrohrs (10) ausgeformt und so angeordnet sind, daß sie an der Stirnwand (13, 14) angreifen und diese in Bezug auf das Zylinderrohr (10) verriegeln, dadurch gekennzeichnet, daß die wenigstens eine Stirnwand (13, 14) mit einer oder mehreren Umfangsnuten (33, 34) versehen ist, die in axialem Abstand zur Stirnfläche (37, 38) angeordnet sind, wobei die Umfangsnut bzw. Umfangsnuten (33, 34) mit dem Vorsprung bzw. den Vorsprüngen (35, 36) in Eingriff stehen, um starre und dauerhafte Befestigungsmittel der Stirnwand (13, 14) relativ zu dem Zylinderrohr (10) zu bilden.
  4. Stellglied nach Anspruch 3, dadurch gekennzeichnet, daß die eine oder die mehreren Umfangsnuten (33, 34) aus einer einzigen Nut bestehen, die sich durchgehend über den Umfang der Stirnwand (13, 14) erstreckt.
  5. Stellglied nach Anspruch 4, dadurch gekennzeichnet, daß der eine oder die mehreren Umfangsvorsprünge (35, 36) aus einem einzigen Vorsprung bestehen, der sich durchgehend über den inneren Umfang des Zylinderrohrs (10) erstreckt.
EP19920850083 1991-04-11 1992-04-10 Zylinder-Kolben-Stelleinrichtung Expired - Lifetime EP0508973B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9101083 1991-04-11
SE9101083A SE468326B (sv) 1991-04-11 1991-04-11 Kolv- cylinderanordning

Publications (3)

Publication Number Publication Date
EP0508973A1 EP0508973A1 (de) 1992-10-14
EP0508973B1 EP0508973B1 (de) 1996-07-17
EP0508973B2 true EP0508973B2 (de) 1999-09-22

Family

ID=20382429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920850083 Expired - Lifetime EP0508973B2 (de) 1991-04-11 1992-04-10 Zylinder-Kolben-Stelleinrichtung

Country Status (3)

Country Link
EP (1) EP0508973B2 (de)
DE (1) DE69212197T3 (de)
SE (1) SE468326B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4414583A1 (de) * 1994-04-27 1995-11-02 Teves Gmbh Alfred Ventil
DE4433649A1 (de) * 1994-09-21 1995-11-02 Fichtel & Sachs Ag Verfahren zur Montage eines Kolben-Zylinderaggregats
DE19537038B4 (de) * 1995-10-05 2006-05-24 Stephan Thies Geberzylinder
DE19603384A1 (de) * 1996-01-31 1997-08-07 Teves Gmbh Alfred Befestigungsvorrichtung
JP4246631B2 (ja) 2001-08-29 2009-04-02 ボッシュ レックスロート アクチエンゲゼルシャフト 油圧シリンダ
DE10152414B4 (de) * 2001-08-29 2013-01-17 Bosch Rexroth Aktiengesellschaft Hydraulikzylinder

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487512A (en) * 1946-01-10 1949-11-08 Automotive & Aircraft Hydrauli Cylinder and cylinder head construction
DE1939707C3 (de) * 1969-08-05 1975-05-07 Robert Bosch Gmbh, 7000 Stuttgart Arbeitszylinder für Druckmittelanlagen
DE2115053A1 (de) * 1971-03-29 1972-10-05 Knapp Mikrohydraulik Gmbh Hydraulik oder Pneumatikzylinder
DE4002558C2 (de) * 1989-02-22 1995-06-29 Knapp Mikrohydraulik Gmbh Hydraulikzylinder

Also Published As

Publication number Publication date
EP0508973A1 (de) 1992-10-14
SE468326B (sv) 1992-12-14
SE9101083L (sv) 1992-10-12
DE69212197T3 (de) 2000-05-25
EP0508973B1 (de) 1996-07-17
DE69212197D1 (de) 1996-08-22
DE69212197T2 (de) 1997-03-06
SE9101083D0 (sv) 1991-04-11

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