EP0692639A1 - Compact pneumatic cylinder - Google Patents

Compact pneumatic cylinder

Info

Publication number
EP0692639A1
EP0692639A1 EP95110632A EP95110632A EP0692639A1 EP 0692639 A1 EP0692639 A1 EP 0692639A1 EP 95110632 A EP95110632 A EP 95110632A EP 95110632 A EP95110632 A EP 95110632A EP 0692639 A1 EP0692639 A1 EP 0692639A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
head
piece
central body
pneumatic cylinder
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Withdrawn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
EP95110632A
Other languages
German (de)
English (en)
French (fr)
Inventor
Luciano Migliori
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.)
Univer SpA
Original Assignee
Univer SpA
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 Univer SpA filed Critical Univer SpA
Publication of EP0692639A1 publication Critical patent/EP0692639A1/en
Withdrawn legal-status Critical Current

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Images

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 present invention relates to pneumatic actuators and in particular concerns a short-stroke cylinder comprising modular components, by means of which it is possible to change the stroke length while maintaining the overall longitudinal dimensions of a pneumatic cylinder of conventional type.
  • the cylinder is made as a single body from a suitable tubular section which is cut to the desired length and on which then all the mechanical operations necessary for obtaining the air passages and for completing the cylinder itself are performed. Since in general the working stroke of the cylinder cannot be varied and since the ports for supplying and discharging the compressed air must have predetermined positions on the body, it is entirely impossible to modify or vary the structure of the actuator unless its overall dimensions are varied or modified, compared to a normal cylinder of standardized type.
  • each cylinder has to be suitably set-up for the necessary machining operations, for formation of the air passages and for the necessary seals at both ends thereof.
  • pneumatic cylinders which retain standardized dimensions and which at the same time allow varied programming and management of production, making it possible to satisfy at any time unexpected requirements, without having to have large warehouse supplies available.
  • composable pneumatic cylinders in which the cylinder comprises a central barrel which can be obtained from a tubular section, and two closing head-pieces which are sealingly screw fastened against the ends of the same central barrel.
  • the object of the present invention is therefore to provide a composable pneumatic cylinder having a compact structure which allows one to form pneumatic cylinders of any length having separate head-pieces, while retaining standardized dimensions and the advantages of composable cylinders of conventional type.
  • each head-piece of the cylinder with a protruding part on one side in which the compressed-air supply and discharge port is formed, and in which this protrusion is seated in a cavity provided in a corresponding peripheral wall portion of the central tubular body of the cylinder, to correspondingly reduce the overall dimension of the cylinder while maintaining unchanged the piston-stroke.
  • a pneumatic cylinder substantially comprises a central body 10 obtained from a tubular section of suitable cross-section, as well as two closing head-pieces 11 and 12 which together the body 10 define a chamber 13 of the cylinder, inside which a reciprocable piston 14 slides.
  • An axially protruding piston rod 15 is fixed to the piston 14 and emerges in sealed manner from one of the head-pieces of the cylinder, for example the head-piece 11 provided with a guide bush 16 and a sealing gasket 17.
  • References 18 and 19 in Figure 3 respectively denote, moreover, two elastically yielding annular members for damping the piston 14 at the end of the stroke, which are arranged in suitable seats in the closing head-pieces 11 and 12.
  • Each of the head-pieces 11 and 12 is sealingly fastened to the central body 10 by means of screws 20 which are screwed into axially aligned holes 21 and 22 of the head-pieces 11, 12 and the central body 10, as shown.
  • Each head-piece 11 and 12 is provided, on the upper side of the cylinder, with an internally threaded hole or port 23, 24 which continues into a passage 23' and 24' opening out into a corresponding side of the chamber 13 of the cylinder for supplying and discharging compressed air.
  • each air inlet/outlet port 23 and 24, with the respective passage 23' and 24' for supplying and discharging the compressed air is formed in correspondence of a respective rib portion 25 and 26 protruding from a corresponding side facing from the abutting surface of the head-piece 11 and 12, said rib portion being aligned with and seated in a corresponding cavity 27, 28 in a peripheral wall portion of the central body 10, opening on one side of respective abutting surface 29 and 30 between the head-piece 11,12 and the central body 10 of the cylinder.
  • the rib portions 25, 26 are orthogonally extending to the cylinder axis, for a length smaller than the thickness of the wall portion of the cylinder body 10 in which the seating cavities 27 and 28 have been provided.
  • a conventional head-piece should have a thickness A sufficient to allow the formation of the air port 23, which would be added to the entire length of the central body 10, corresponding to the working stroke.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
EP95110632A 1994-07-13 1995-07-07 Compact pneumatic cylinder Withdrawn EP0692639A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI940502 IT233859Y1 (it) 1994-07-13 1994-07-13 Cilindro pneumatico compatto
ITMI940502 1994-07-13

Publications (1)

Publication Number Publication Date
EP0692639A1 true EP0692639A1 (en) 1996-01-17

Family

ID=11368246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110632A Withdrawn EP0692639A1 (en) 1994-07-13 1995-07-07 Compact pneumatic cylinder

Country Status (3)

Country Link
EP (1) EP0692639A1 (it)
CA (1) CA2153640A1 (it)
IT (1) IT233859Y1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0812991A3 (de) * 1996-06-14 1998-07-22 Robert Bosch Gmbh Druckmittelbetätigbarer Arbeitszylinder
US6152015A (en) * 1997-09-23 2000-11-28 Migliori; Luciano One-side fed, double-acting, pneumatic actuator
EP1199480A2 (en) 2000-10-16 2002-04-24 Luciano Migliori Compact pneumatic cylinder, with cushioning device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2020746B (en) * 1978-05-12 1982-07-07 Parisienne Outillage Jack
EP0384948A1 (de) * 1989-03-03 1990-09-05 Festo KG Zylinder für ein Kolben-Zylinder-Aggregat
DE4041992A1 (de) * 1990-12-21 1992-07-02 Mannesmann Ag Verfahren zum herstellen eines fluidischen hubzylinders sowie eine kolben-zylinder-einheit
WO1994000706A1 (en) * 1992-06-26 1994-01-06 Ab Rexroth Mecman Fluid pressure cylinder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2020746B (en) * 1978-05-12 1982-07-07 Parisienne Outillage Jack
EP0384948A1 (de) * 1989-03-03 1990-09-05 Festo KG Zylinder für ein Kolben-Zylinder-Aggregat
DE4041992A1 (de) * 1990-12-21 1992-07-02 Mannesmann Ag Verfahren zum herstellen eines fluidischen hubzylinders sowie eine kolben-zylinder-einheit
WO1994000706A1 (en) * 1992-06-26 1994-01-06 Ab Rexroth Mecman Fluid pressure cylinder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0812991A3 (de) * 1996-06-14 1998-07-22 Robert Bosch Gmbh Druckmittelbetätigbarer Arbeitszylinder
US6152015A (en) * 1997-09-23 2000-11-28 Migliori; Luciano One-side fed, double-acting, pneumatic actuator
EP1199480A2 (en) 2000-10-16 2002-04-24 Luciano Migliori Compact pneumatic cylinder, with cushioning device
US6553889B2 (en) 2000-10-16 2003-04-29 Luciano Migliori Compact pneumatic cylinder, with cushioning device

Also Published As

Publication number Publication date
ITMI940502U1 (it) 1996-01-13
CA2153640A1 (en) 1996-01-14
ITMI940502V0 (it) 1994-07-13
IT233859Y1 (it) 2000-02-10

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