EP0896159A2 - Pneumatischer Stellzylinder mit nicht drehbarer Kolbenstange - Google Patents

Pneumatischer Stellzylinder mit nicht drehbarer Kolbenstange Download PDF

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Publication number
EP0896159A2
EP0896159A2 EP98200300A EP98200300A EP0896159A2 EP 0896159 A2 EP0896159 A2 EP 0896159A2 EP 98200300 A EP98200300 A EP 98200300A EP 98200300 A EP98200300 A EP 98200300A EP 0896159 A2 EP0896159 A2 EP 0896159A2
Authority
EP
European Patent Office
Prior art keywords
pneumatic cylinder
shaft
rotating
rolling elements
sleeve member
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Withdrawn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
EP98200300A
Other languages
English (en)
French (fr)
Other versions
EP0896159A3 (de
Inventor
Abele Bertola
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.)
Waircom Mbs SpA
Original Assignee
Waircom Mbs 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 Waircom Mbs SpA filed Critical Waircom Mbs SpA
Publication of EP0896159A2 publication Critical patent/EP0896159A2/de
Publication of EP0896159A3 publication Critical patent/EP0896159A3/de
Withdrawn legal-status Critical Current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
    • F15B15/1414—Characterised by the construction of the motor unit of the straight-cylinder type with non-rotatable piston

Definitions

  • the present invention relates to the field of pneumatic equipment and more particularly a pneumatic cylinder of the kind having a non rotating shaft.
  • Pneumatic cylinders with non rotating shaft of state of the art are generally provided with shaped bushings, for instance of triangular or quadrangular cross-section or with lobes and a shaft that has a cross-sectional shape corresponding to that of the bushing.
  • Object of the present invention is to remove the above mentioned drawbacks and to provide a pneumatic cylinder with non rotating shaft, having great precision and performances that are considerably higher than those of the known pneumatic cylinders.
  • the pneumatic cylinder according to the present invention substantially employs a splined shaft and a sleeve, friction between these two members being rolling friction, thus considerably lower than the sliding friction of the known devices.
  • the pneumatic cylinder 10 comprises, in addition to the liner or tube (not shown for sake of clarity): a stem 12, a front head 14, a front dampening ogive 16, a piston 18, a threaded portion 20 of the shaft 48, a back ogive 22, having not only the dampening function but also that of containing a sleeve 24 (which will be described in detail hereinafter), a back head 26, a splined bar 28, an end plate 30 provided with a threaded portion 32 for matching a corresponding threaded portion 34 of the back head 26 and one or more pins 36 for locking the end plate to the back head.
  • a stem 12 a front head 14
  • a front dampening ogive 16 a piston 18, a threaded portion 20 of the shaft 48
  • a back ogive 22 having not only the dampening function but also that of containing a sleeve 24 (which will be described in detail hereinafter)
  • a back head 26 a splined
  • the back ogive is screwed on the threaded portion of the shaft and the sleeve 24 is pressed inside the ogive, while the splined bar 28 may slide but not rotate inside the ogive.
  • the splined bar 28 is an elongated rod member provided with a plurality of longitudinal grooves 40, preferably spaced equally along the circumference.
  • the sleeve 24 is a cylindrical member provided with a number of sets 42 of rotating or rolling elements 44 such as balls, rollers, needles, possibly having some taper, and the like.
  • the number of sets of rotating or rolling elements corresponds to the number of grooves 40 of the splined bar and conversely, and the sets 42 of rotating or revolving elements 44 are also spaced equally along the circumference.
  • each set 42 of rotating or rolling elements 44 comprises a number of freely rotating and circulating balls 44.
  • Some of these balls 44 are caged and in turn partially project radially inwardly with respect to the inner surface of the sleeve 24 and engage the grooves 40.
  • Lubrication means are of course provided in the sleeve 24, such as little holes 46.
  • a second embodiment of the invention provides the sleeve 24 integral with the front head 14 and the shaft having longitudinal grooves like the splined bar 28.
  • pneumatic cylinder should be understood as having a broader and general meaning than the mere literal one.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Transmission Devices (AREA)
  • Golf Clubs (AREA)
  • Jib Cranes (AREA)
EP98200300A 1997-08-04 1998-02-02 Pneumatischer Stellzylinder mit nicht drehbarer Kolbenstange Withdrawn EP0896159A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97MI000593 IT237848Y1 (it) 1997-08-04 1997-08-04 Cilindrico pneumatico con albero non rotante
ITMI970593U 1997-08-04

Publications (2)

Publication Number Publication Date
EP0896159A2 true EP0896159A2 (de) 1999-02-10
EP0896159A3 EP0896159A3 (de) 2000-09-27

Family

ID=11376453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98200300A Withdrawn EP0896159A3 (de) 1997-08-04 1998-02-02 Pneumatischer Stellzylinder mit nicht drehbarer Kolbenstange

Country Status (2)

Country Link
EP (1) EP0896159A3 (de)
IT (1) IT237848Y1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2825766A1 (fr) * 2001-06-08 2002-12-13 Lacroix Soc E Mecanisme a liberation controlee par un effet thermique
CN114645916A (zh) * 2022-03-18 2022-06-21 上汽通用五菱汽车股份有限公司 一种传动机构的对接结构及其对接传动方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4119017A (en) * 1977-03-23 1978-10-10 Phd, Inc. Non-rotatable fluid power cylinder
FR2607877B1 (fr) * 1986-12-05 1993-02-12 Forest Line Sa Verin hydraulique ou pneumatique dont l'element mobile en translation est immobilise en rotation autour de son axe longitudinal
DE3814184A1 (de) * 1988-04-27 1989-11-09 Festo Kg Vorschubeinrichtung
DE3820337A1 (de) * 1988-06-15 1989-12-21 Expert Maschbau Kolben-zylinder-einheit mit gegen verdrehung gesicherter kolbenstange
DE29517615U1 (de) * 1995-11-07 1995-12-21 Festo Kg, 73734 Esslingen Fluidbetätigter Arbeitszylinder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2825766A1 (fr) * 2001-06-08 2002-12-13 Lacroix Soc E Mecanisme a liberation controlee par un effet thermique
EP1264999A3 (de) * 2001-06-08 2004-02-25 Etienne Lacroix - Tous Artifices Sa Thermisch gesteuerter Entriegelungsmechanismus
CN114645916A (zh) * 2022-03-18 2022-06-21 上汽通用五菱汽车股份有限公司 一种传动机构的对接结构及其对接传动方法

Also Published As

Publication number Publication date
IT237848Y1 (it) 2000-09-29
EP0896159A3 (de) 2000-09-27
ITMI970593U1 (it) 1999-02-04

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