EP0269905A2 - Unité de cylindre de levage - Google Patents

Unité de cylindre de levage Download PDF

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Publication number
EP0269905A2
EP0269905A2 EP87116374A EP87116374A EP0269905A2 EP 0269905 A2 EP0269905 A2 EP 0269905A2 EP 87116374 A EP87116374 A EP 87116374A EP 87116374 A EP87116374 A EP 87116374A EP 0269905 A2 EP0269905 A2 EP 0269905A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
head part
lifting cylinder
longitudinal bore
pressure
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
EP87116374A
Other languages
German (de)
English (en)
Other versions
EP0269905B1 (fr
EP0269905A3 (en
Inventor
Franco Toss
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0269905A2 publication Critical patent/EP0269905A2/fr
Publication of EP0269905A3 publication Critical patent/EP0269905A3/de
Application granted granted Critical
Publication of EP0269905B1 publication Critical patent/EP0269905B1/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
    • F15B15/1471—Guiding means other than in the end cap
    • 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
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages

Definitions

  • the invention relates to a lifting cylinder unit consisting of a cylinder with a longitudinal bore in which a piston which can be pressurized pneumatically or hydraulically on both sides and which is connected via a piston rod led out at one end of the cylinder to a head part, on which a part to be moved Part can be fastened, the cylinder and the head part having approximately the same length, opposite fastening surfaces and on their long sides with guide surfaces of a linear guide.
  • Such a lifting cylinder unit is described in EP-A1-134 398. It represents an alternative to the most common design of Hubyzlinder units, e.g. B. according to FR-A-22 77 260 and US-A-394 539, in which the head partly not radially, but axially next to the piston rod and the cylinder.
  • the design described at the outset offers the advantage of relatively large fastening surfaces not only on the cylinder, but also on the head part, as well as simple, reliable absorption of loads from lateral forces with a very compact design at the same time.
  • the invention has for its object to further reduce the space required for such lifting cylinder units and at the same time to ensure better accessibility of the pressure fluid connections.
  • the above object is achieved in that the longitudinal bore of the cylinder is lined with a sleeve, both pressure connections are arranged at the same end and the pressure fluid is guided from one pressure connection to the opposite end of the cylinder through a channel that partially through the outer surface of the Rifle is limited.
  • the additional bush provided according to the invention does not normally need to bring about an increase in the cross-sectional dimensions. At the same time you can achieve in this simple way that no more pressure connections are required at both ends of the cylinder.
  • the proposed attachment of the pressurized fluid connections to the same end of the cylinder only requires the necessary space for the connections there, while the opposite end of the lifting cylinder unit can be attached in any way to other components or can be attached or moved directly next to these without, how so far, a pressure connection is disturbing at this end. Since both pressure connections are accessible at the same end of the cylinder according to the invention, assembly is also made considerably easier, since one end of the lifting cylinder units is usually easy to get to.
  • the pressure connections are arranged on the end of the cylinder opposite the passage of the piston rod. It is thereby achieved that the axial space between the axially opposite surfaces of the cylinder and the head part and also, if appropriate, the longitudinally extending fastening surface of the cylinder can be kept free of pressure connections.
  • the flow channel for the pressure fluid to be conducted from the one pressure connection to the cylinder chamber located on the opposite side of the piston is formed by at least one longitudinal groove in the longitudinal bore of the cylinder, which is then only radially tightly covered by the sleeve needs to be.
  • each relatively small grooves can be machined and molded into the longitudinal bore of the cylinder and / or the outer lateral surface of the sleeve and through an annular channel which are connected to a pressure connection.
  • the lifting cylinder unit shown in the drawing consists of a cylinder 10 and a head part 12 which is mounted and guided longitudinally displaceably on the cylinder 10 in the manner of a slide.
  • the head part 12 is U-shaped in cross section and partially overlaps the cylinder 10, as can be seen from FIGS. 2 and 3.
  • the linear guide preferably consists of balls or other rolling elements that run in opposite longitudinal grooves of the two parts 10 and 12.
  • the cylinder 10 can be fastened to a machine frame with its lower, longitudinally extending fastening surface or also with its free end surface, for example by means of screws. On the top of the head part 12, where there are three threaded holes according to FIG. 3 in the example, z. B. with the help of a tool, a workpiece or a measuring instrument. Parts that are to be moved relative to the cylinder 10 can also be attached to the outer end face of the head part 12.
  • the cylinder 10 has front and rear end walls 14 and 16, respectively.
  • a cylinder bore 18 extends from its front to the rear end.
  • a piston 20 is guided in the longitudinal bore 18 and divides it into a front cylinder chamber 22 and a rear cylinder chamber 24.
  • the head part 12 has an L-shape in longitudinal section according to FIG. 1, the longer leg being approximately as long as the cylinder 10, and the shorter leg being connected to the piston rod 26.
  • FIGS. 4 and 5 show that the longitudinal bore 18 of the cylinder 10 is lined with a sleeve 28.
  • the piston 20 On the inner wall of the sleeve 18, the piston 20. With its outer circumferential surface, the sleeve 18 sits so firmly in the cylinder 10 that it extends from one end wall 14, 16 of the cylinder into the longitudinal bore 18 before the insertion of the Bush 28 incorporated longitudinal groove 30 closes radially inward tight.
  • the channel 30 is connected to an external pressure connection via a connection bore 32.
  • the pneumatic or hydraulic pressure fluid introduced above into the channel 30 flows directly in front of the rear end wall 16 via a radial opening 34 in the bush 28 into the rear cylinder chamber 24.
  • connection bore 36 in the front end wall 14 forms a connection between the front cylinder chamber 22 and another external pressure connection.
  • the non-pressurized connection bore 32 or 36 serves as a return line for the fluid displaced from the respectively relieved cylinder chamber 22 or 24.
  • FIG. 1 shows an alternative in that at least one of the pressure connections can be attached on the side of the lower, longitudinally extending fastening surface of the cylinder 10.
  • FIG. 3 shows an alternative in that at least one of the pressure connections can be attached on the side of the lower, longitudinally extending fastening surface of the cylinder 10.
  • the pressure connections there is the further possibility of applying the pressure connections on one side or on opposite sides of the front end wall 14, compare the connection bore indicated in FIG. 3.
  • the rear end wall 16 is more accessible from below or from the side than the front end wall 14. In this case, the pressure connections would be attached to the rear end wall 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
EP87116374A 1986-12-02 1987-11-06 Unité de cylindre de levage Expired - Lifetime EP0269905B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US93675786A 1986-12-02 1986-12-02
US936757 1986-12-02

Publications (3)

Publication Number Publication Date
EP0269905A2 true EP0269905A2 (fr) 1988-06-08
EP0269905A3 EP0269905A3 (en) 1989-10-11
EP0269905B1 EP0269905B1 (fr) 1992-04-29

Family

ID=25469035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87116374A Expired - Lifetime EP0269905B1 (fr) 1986-12-02 1987-11-06 Unité de cylindre de levage

Country Status (2)

Country Link
EP (1) EP0269905B1 (fr)
DE (1) DE3778655D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013791A1 (fr) * 1990-03-06 1991-09-19 Zahnradfabrik Friedrichshafen Ag Mecanisme hydraulique de direction a cremaillere
BE1011346A3 (nl) * 1997-09-01 1999-07-06 Dhollander Jan Jozef Prudence Verbeterde hydraulische cilinder.
CN102062131A (zh) * 2010-10-29 2011-05-18 无锡迪奥机械有限公司 可转向可分速液压阻尼缸

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686448A (en) * 1950-07-31 1954-08-17 Gisholt Machine Co Hydraulic screw feed
DE2939422A1 (de) * 1979-09-28 1981-04-16 Helmut Dipl.-Ing. Dr. 7064 Remshalden Wiesner Zylinderblock
EP0134398B1 (fr) * 1983-08-27 1988-07-20 Franco Toss Elément modulaire á déplacement linéaire par piston
WO1986002054A1 (fr) * 1984-10-03 1986-04-10 FUSSEDER, Günther Servomoteur de direction
DE8606976U1 (de) * 1986-03-13 1986-07-17 Index-Werke Kg Hahn & Tessky, 7300 Esslingen Vorschubgerät für einen Werkzeugschlitten einer Werkzeugmaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013791A1 (fr) * 1990-03-06 1991-09-19 Zahnradfabrik Friedrichshafen Ag Mecanisme hydraulique de direction a cremaillere
BE1011346A3 (nl) * 1997-09-01 1999-07-06 Dhollander Jan Jozef Prudence Verbeterde hydraulische cilinder.
CN102062131A (zh) * 2010-10-29 2011-05-18 无锡迪奥机械有限公司 可转向可分速液压阻尼缸
CN102062131B (zh) * 2010-10-29 2013-04-17 无锡迪奥机械有限公司 可转向可分速液压阻尼缸

Also Published As

Publication number Publication date
EP0269905B1 (fr) 1992-04-29
DE3778655D1 (de) 1992-06-04
EP0269905A3 (en) 1989-10-11

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