EP0588779B1 - Vérin hydraulique - Google Patents

Vérin hydraulique Download PDF

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Publication number
EP0588779B1
EP0588779B1 EP93890157A EP93890157A EP0588779B1 EP 0588779 B1 EP0588779 B1 EP 0588779B1 EP 93890157 A EP93890157 A EP 93890157A EP 93890157 A EP93890157 A EP 93890157A EP 0588779 B1 EP0588779 B1 EP 0588779B1
Authority
EP
European Patent Office
Prior art keywords
cylindrical tube
cover
hydraulic cylinder
groove
base
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
EP93890157A
Other languages
German (de)
English (en)
Other versions
EP0588779A1 (fr
Inventor
Wolfgang Kladiwa
Klaus Stolle
Gerhard Huber
Walter Kiefer
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.)
Hoerbiger Ventilwerke GmbH and Co KG
Original Assignee
Hoerbiger Ventilwerke GmbH and Co 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=3520391&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0588779(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hoerbiger Ventilwerke GmbH and Co KG filed Critical Hoerbiger Ventilwerke GmbH and Co KG
Publication of EP0588779A1 publication Critical patent/EP0588779A1/fr
Application granted granted Critical
Publication of EP0588779B1 publication Critical patent/EP0588779B1/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
    • F15B15/14—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/4927—Cylinder, cylinder head or engine valve sleeve making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49909—Securing cup or tube between axially extending concentric annuli
    • Y10T29/49911—Securing cup or tube between axially extending concentric annuli by expanding inner annulus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
    • Y10T29/4994—Radially expanding internal tube

Definitions

  • the invention relates to a hydraulic cylinder with a cylinder tube, which is provided at one end with a bottom and at the other end with a cover, wherein groove-shaped recesses are provided on the cover and bottom for connecting the cylinder tube on the one hand and the cover and the bottom, into which a Holding area of the respective end of the cylinder tube is pressed in under permanent deformation.
  • Hydraulic cylinders of the type mentioned are known, for example, from DE-A1 22 38 211 and DE-A1 40 02 558 and are used in particular in hydraulic actuated or controlled devices as working cylinders.
  • the aforementioned type of connection between the cylinder tube and the cover or base enables a simpler and more cost-effective production than the solutions of the connection by means of screw threads or soldering or welding, which are also common in this context, which offers advantages in particular in the case of mass articles.
  • the cylinder tube While in the known hydraulic cylinder mentioned above in the first place, the cylinder tube is narrowed by simple bending or flanging and thereby engages in a groove provided on the peripheral surface of the bottom or cover, which does not result in a particularly reliable connection and is not suitable for high working pressures, is formed in the second place as known known hydraulic cylinder one side of the groove-shaped recess frustoconical, the associated end of the cylinder tube is pressed into this recess by compression molding such that the material of the cylinder tube in the region of the groove an annular portion lying against the ground and then forms a conical section lying against the conical surface - the disadvantage here is that the cylinder tube can at least partially slip over said conical surface under higher loads, which results in at least one leak if not an egg n functional failure results.
  • a pressure medium working cylinder in particular for compressed air, is known in which the end of the smooth cylinder tube is fastened by deformation engaging in an annular groove of the cover, the pressure seal being provided by a separate one in the annular groove arranged sealing ring takes place.
  • the object of the present invention is to provide a hydraulic cylinder to improve the type mentioned in such a way that the disadvantages of the known devices are avoided and that, in particular, despite simple and inexpensive manufacture, a secure connection between the cylinder tube on the one hand and the cover and base on the other hand can be ensured.
  • This screwing and in particular its circumferential edge which is outer with respect to the longitudinal extent of the cylinder tube and which, according to a preferred development of the invention, is sharp-edged, claws to a certain extent during the pressing process into the lid or bottom and in particular over the associated inner edge of the groove-shaped recess, with which A highly resilient, positive connection results, according to which the hydraulic cylinder can still be operated safely even with much higher operating pressures than in the known hydraulic cylinders of the type mentioned. In this way, the cylinder tube can no longer simply slip over the pressed parts even when the hydraulic cylinder is subjected to high pressures.
  • a plurality of holding areas with recesses and a number of associated groove-shaped recesses can be provided, which further increases the permissible load capacity of the connection.
  • the cylinder tube consists of a relatively hard material, in particular steel, and the base and / or cover consists of a relatively soft material, in particular aluminum.
  • the base and / or cover consists of a relatively soft material, in particular aluminum.
  • Another preferred development of the invention is characterized in that the bottom and / or cover are designed to overlap the associated end of the cylinder tube and that the respective holding area is pressed from the inside into the groove-shaped recess, which is open on the inside, on the cylinder tube, which is what the design and thus application options increased while maintaining the benefits achieved.
  • FIG. 1 shows a longitudinal section through a hydraulic cylinder designed according to the invention
  • FIG. 2 shows an external view of part of the hydraulic cylinder according to FIG. 1
  • FIG. 3 shows a cylinder tube for use in a hydraulic cylinder according to FIGS. 1 and 2 before pressing Cover or bottom
  • FIG. 4 the enlarged detail IV from FIG. 3
  • FIG. 5 the enlarged detail V from FIG. 3
  • FIG. 6 a separate sectional drawing of the cover of the hydraulic cylinder from FIG. 1 on an enlarged scale
  • FIG. 7 an enlargement of detail VII from FIG. 6.
  • the hydraulic cylinder shown has a cylinder tube 1 in which a piston 2 is guided in the axial direction, the piston rod 3 of which protrudes outwards and is used via a screwed-in piston rod eye 4 to actuate units which are not shown here.
  • the hydraulic cylinder is closed on one side by means of a bottom 6 protruding into one end 5 of the cylinder tube 1 and at the other end 7 by means of a cover 8 which overlaps the cylinder tube 1, hydraulic connections 9 being provided on both the base 6 and the cover 8, which are provided via Lines 10 and 11 are connected to the interior 12 of the cylinder tube 1 and are used for the mutual application of hydraulic medium to actuate the piston 2.
  • a pivot hole 13 for fastening the bottom 6 and thus the entire hydraulic cylinder, for example at a housing location or the like, not shown here, as well as a seal 14 for sealing the piston 2 in the cylinder tube 1 and a seal 15 for sealing the piston rod 3 relative to the cover 8.
  • groove-shaped recesses 16, 17 are provided on cover 8 and base 6, into which a holding area 18, 19 of the respective end 7, 5 of the cylinder tube 1 is pressed with permanent deformation, which results in a positive, secure connection even at high operating pressures.
  • sealing rings 20, 21 are also inserted into associated grooves 22, 23 on the base 6 or cover 8.
  • Fig. 2 can be seen in the holding area 19 when pushing the end 5 of the cylinder 1 into the groove-shaped recess 17 from the outside occurring extrusion marks 24, which by a not shown here, in the radial direction at the same time in many places on the end 5 of the Cylinder tube 1 acting press tool arise, whereby a uniform contact of the holding area 19 and thus a firm and tight connection is achieved.
  • the holding region 18 is pressed evenly into the groove-shaped recess 16 - here, of course, from the inside.
  • the concrete design of the groove-shaped recess 16 including the inner edge 27 on the one hand and the indentations 26 including their outer edge 29 on the other hand are of course also conceivable and possible within the scope of the invention.
  • the bevel 30 on the left side of the groove-shaped recess 16 according to FIG. 7 serves to counteract the axial shortening of the cylinder tube 1 during expansion by the pressing and thus to eliminate play between the pressed parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)

Claims (5)

  1. Cylindre hydraulique, comportant un tube cylindrique qui est pourvu à une extrémité d'un fond et à l'autre extrémité d'un couvercle, dans lequel, pour la liaison entre le tube cylindrique d'une part et le couvercle et le fond d'autre part, on prévoit des évidements en forme de gorge sur le couvercle et sur le fond, dans lesquels est enfoncée une région de retenue de l'extrémité respective du tube cylindrique sous une déformation permanente, caractérisé en ce que dans la région (25) de l'extrémité, située à l'extérieur par rapport à l'étendue longitudinale du tube cylindrique (1), de chaque région de retenue (18, 19) du tube cylindrique non déformé (1), on prévoit une gorge tournée dans la masse (26) qui s'engage à l'état déformé du tube cylindrique (1) par dessus l'arête intérieure associée (27, 28) de l'évidement en forme de gorge (16, 17).
  2. Cylindre hydraulique selon la revendication 1, caractérisé en ce que l'arête (29), située à l'extérieur par rapport à l'étendue longitudinale du tube cylindrique (1), de la gorge tournée dans la masse (26), est réalisée de façon acérée.
  3. Cylindre hydraulique selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que l'on prévoit à chaque extrémité (5, 7) du tube cylindrique (1) plusieurs régions de retenue (18, 19) comportant des gorges tournées dans la masse (26), ainsi que plusieurs évidements associés en forme de gorge (16, 17).
  4. Cylindre hydraulique selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le tube cylindrique (1) est constitué en une matière relativement dure, en particulier en acier, et en ce que le fond (6) et/ou le couvercle (8) est constitué en une matière relativement ductile, en particulier en aluminium.
  5. Cylindre hydraulique selon l'une ou plusieurs des revendications 1 à 4, caractérisé en ce que le fond (6) et/ou le couvercle (8) sont réalisés de façon à recouvrir l'extrémité associée (5, 7) du tube cylindrique (1), et en ce que la région de retenue respective (18, 19) avec sa gorge tournée dans la masse (26) logée à l'extérieur sur le tube cylindrique (26) est enfoncée depuis l'intérieur dans l'évidement en forme de gorge (16, 17) ouvert vers l'intérieur.
EP93890157A 1992-09-02 1993-08-19 Vérin hydraulique Expired - Lifetime EP0588779B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1759/92 1992-09-02
AT0175992A AT401677B (de) 1992-09-02 1992-09-02 Hydraulikzylinder

Publications (2)

Publication Number Publication Date
EP0588779A1 EP0588779A1 (fr) 1994-03-23
EP0588779B1 true EP0588779B1 (fr) 1995-05-17

Family

ID=3520391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93890157A Expired - Lifetime EP0588779B1 (fr) 1992-09-02 1993-08-19 Vérin hydraulique

Country Status (6)

Country Link
US (1) US5375507A (fr)
EP (1) EP0588779B1 (fr)
AT (1) AT401677B (fr)
DE (1) DE59300205D1 (fr)
ES (1) ES2072173T3 (fr)
FI (1) FI933820A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5651303A (en) * 1994-11-14 1997-07-29 Polygon Company Fluid cylinder end cap assembly
US5465647A (en) * 1994-11-14 1995-11-14 Polygon Company Fluid cylinder end cap assembly
US5622098A (en) * 1996-03-08 1997-04-22 Amalga Composites, Inc. High pressure cylinder with locking end caps
US5680808A (en) * 1996-05-09 1997-10-28 Ingersoll-Rand Company Fluid cylinder and method of assembly
DE19721227A1 (de) * 1997-05-21 1998-11-26 Bosch Gmbh Robert Kolbenpumpe
FR2790298B1 (fr) * 1999-02-25 2001-05-11 Serta Dispositif de fermeture de l'extremite formant le fond ou le guide de tige du fut d'un cylindre de travail
US6439103B1 (en) 1999-09-07 2002-08-27 Vector Engineering Co. Hydraulic and pneumatic cylinder construction
EP1128073A1 (fr) * 2000-02-28 2001-08-29 Serta Procédé de fermeture de l'extrémité formant le fond ou le guide de tige du fût d'un cylindre de travail
AT408209B (de) * 2000-03-23 2001-09-25 Hoerbiger Hydraulik Betätigungsanordnung für bewegbare teile an fahrzeugen
US20070074964A1 (en) * 2005-10-03 2007-04-05 Vector Engineering Co. Telescoping fluid actuator

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7909401U1 (de) * 1980-09-18 Robert Bosch Gmbh, 7000 Stuttgart Arbeitszylinder
US1658553A (en) * 1922-11-09 1928-02-07 Gen Motors Res Corp Method of making engine cylinders
FR945273A (fr) * 1947-04-17 1949-04-29 Perfectionnements aux pompes fonctionnant à la main, par exemple aux pompes de bicyclettes
US2832130A (en) * 1953-10-16 1958-04-29 Harvey Machine Co Inc Method of securing an end piece to a tube
US3848325A (en) * 1972-05-01 1974-11-19 C Bimba Method for assembling body and end sections for fluid power cylinder
DE2238211A1 (de) * 1972-08-03 1974-02-14 Haenchen Kg Herbert Mit druckmittel beaufschlagbarer zylindrischer behaelter
DE3020390C2 (de) * 1980-05-29 1983-03-24 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Arbeitszylinder
JPS57157863A (en) * 1981-03-26 1982-09-29 Showa Mfg Co Ltd Formation of closed end of cylinder
JPS57149659A (en) * 1982-01-11 1982-09-16 Taiyo Tekko Kk Cylinder cover to cylinder tube joining method for liquid pressure cylinder
DE3432443C2 (de) * 1984-09-04 1986-08-14 Klaus Ing.(grad.) 4232 Xanten Dietzel Verfahren zum Herstellen einer Schlauchpreßhülse für die Hochdruckanwendung und Vorrichtung zum Durchführen dieses Verfahrens
US4867043A (en) * 1986-06-30 1989-09-19 Tayco Developments, Inc. End cap for fluid cylinder
DE4002558C2 (de) * 1989-02-22 1995-06-29 Knapp Mikrohydraulik Gmbh Hydraulikzylinder

Also Published As

Publication number Publication date
EP0588779A1 (fr) 1994-03-23
US5375507A (en) 1994-12-27
ES2072173T3 (es) 1995-07-01
FI933820A (fi) 1994-03-03
AT401677B (de) 1996-11-25
FI933820A0 (fi) 1993-09-01
ATA175992A (de) 1996-03-15
DE59300205D1 (de) 1995-06-22

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