EP0838616A3 - Piston for a pneumatic or hydraulic power cylinder - Google Patents

Piston for a pneumatic or hydraulic power cylinder Download PDF

Info

Publication number
EP0838616A3
EP0838616A3 EP97890197A EP97890197A EP0838616A3 EP 0838616 A3 EP0838616 A3 EP 0838616A3 EP 97890197 A EP97890197 A EP 97890197A EP 97890197 A EP97890197 A EP 97890197A EP 0838616 A3 EP0838616 A3 EP 0838616A3
Authority
EP
European Patent Office
Prior art keywords
pneumatic
piston
cylinder
sealing rings
rings
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Withdrawn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
EP97890197A
Other languages
German (de)
French (fr)
Other versions
EP0838616A2 (en
Inventor
Jürgen Wolf
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.)
Hygrama AG
Original Assignee
Hygrama AG
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 Hygrama AG filed Critical Hygrama AG
Publication of EP0838616A2 publication Critical patent/EP0838616A2/en
Publication of EP0838616A3 publication Critical patent/EP0838616A3/en
Withdrawn legal-status Critical Current

Links

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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches
    • 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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means

Landscapes

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

Abstract

Ein Kolben (2) für einen pneumatischen oder hydraulischen Arbeitszylinder (1) ist außer mit Dichtungsringen (15,16) und einem Ringmagnet (17), um eine berührungsfreie Abtastung der jeweiligen Kolbenposition zu ermöglichen, zwischen den Dichtungsringen (15,16) und dem Ringmagneten (17) mit zusätzlichen Führungsringen (18,19) versehen. Diese Führungsringe (18,19) bestehen aus widerstandsfähigem Material und liegen an der Innenwand des Zylinders (1) führend und zentrierend an. Durch diese Führung und Zentrierung sind die einfach ausgebildeten Kolben (2) auch für Zylinder mit längeren Hüben und größeren Nenndurchmessern geeignet, ohne daß dabei die Gefahr von Beschädigungen der Dichtungsringe (15,16) und von durch schlechte Führung entstehenden Undichtheiten des Zylinders besteht. A piston (2) for a pneumatic or hydraulic working cylinder (1) is in addition to the sealing rings (15,16) and a ring magnet (17) to enable contact-free scanning of the respective piston position between the sealing rings (15,16) and the Provide ring magnets (17) with additional guide rings (18, 19). These guide rings (18, 19) are made of resistant material and lie in a leading and centering manner on the inner wall of the cylinder (1). Through this guidance and centering, the simply designed pistons (2) are also suitable for cylinders with longer strokes and larger nominal diameters, without the risk of damage to the sealing rings (15, 16) and of leaks in the cylinder resulting from poor guidance.

EP97890197A 1996-10-28 1997-10-03 Piston for a pneumatic or hydraulic power cylinder Withdrawn EP0838616A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1879/96 1996-10-28
AT0187996A AT404290B (en) 1996-10-28 1996-10-28 PISTON FOR A PNEUMATIC OR HYDRAULIC WORKING CYLINDER

Publications (2)

Publication Number Publication Date
EP0838616A2 EP0838616A2 (en) 1998-04-29
EP0838616A3 true EP0838616A3 (en) 1998-05-13

Family

ID=3522996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97890197A Withdrawn EP0838616A3 (en) 1996-10-28 1997-10-03 Piston for a pneumatic or hydraulic power cylinder

Country Status (3)

Country Link
EP (1) EP0838616A3 (en)
AT (1) AT404290B (en)
CZ (1) CZ343497A3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10323797B4 (en) * 2003-05-23 2005-05-25 Zf Sachs Ag Piston-cylinder unit with a sensor system
JP2006242341A (en) * 2005-03-04 2006-09-14 Smc Corp Actuator equipped with position detecting mechanism

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH483569A (en) * 1968-05-17 1969-12-31 Hoerbiger Ventilwerke Ag Umsteuereinrichtung für verschiebbare Maschinenteile, insbesondere für pneumatische und hydraulische Zylinder
DE2614263A1 (en) * 1976-04-02 1977-10-13 Walter Hunger Piston seal ring located by axial bearing bushes - has coaxial expansion ring to produce contact pressure
DE2917232A1 (en) * 1978-05-03 1979-11-08 Hydro Pneumatic Ab Permanent magnet indicator for piston in cylinder - has piston coated on sliding surfaces with permanent magnetic plastics material
DE3015258A1 (en) * 1980-04-21 1981-10-29 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Operating cylinder piston position transducer - has transducer ring forming standard sealing or slider ring
EP0093859A2 (en) * 1982-04-02 1983-11-16 Robert Bosch Gmbh Piston for the contactless sensing of the piston position
EP0301845A1 (en) * 1987-07-31 1989-02-01 Norgren Martonair Limited Sensing system
DE4122481A1 (en) * 1991-07-06 1993-01-07 Kuhnke Gmbh Kg H Piston-cylinder arrangement with damped piston - uses external contactless sensor to determine piston position

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115071A (en) * 1961-10-06 1963-12-24 Hough Co Frank Reciprocating hydraulic motor
DE7722958U1 (en) * 1977-07-22 1977-12-29 Specken Ag, Urdorf (Schweiz) Pneumatic cylinder with contactless limit switch
JPS5876804U (en) * 1981-11-19 1983-05-24 焼結金属工業株式会社 rodless cylinder

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH483569A (en) * 1968-05-17 1969-12-31 Hoerbiger Ventilwerke Ag Umsteuereinrichtung für verschiebbare Maschinenteile, insbesondere für pneumatische und hydraulische Zylinder
DE2614263A1 (en) * 1976-04-02 1977-10-13 Walter Hunger Piston seal ring located by axial bearing bushes - has coaxial expansion ring to produce contact pressure
DE2917232A1 (en) * 1978-05-03 1979-11-08 Hydro Pneumatic Ab Permanent magnet indicator for piston in cylinder - has piston coated on sliding surfaces with permanent magnetic plastics material
DE3015258A1 (en) * 1980-04-21 1981-10-29 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Operating cylinder piston position transducer - has transducer ring forming standard sealing or slider ring
EP0093859A2 (en) * 1982-04-02 1983-11-16 Robert Bosch Gmbh Piston for the contactless sensing of the piston position
EP0301845A1 (en) * 1987-07-31 1989-02-01 Norgren Martonair Limited Sensing system
DE4122481A1 (en) * 1991-07-06 1993-01-07 Kuhnke Gmbh Kg H Piston-cylinder arrangement with damped piston - uses external contactless sensor to determine piston position

Also Published As

Publication number Publication date
CZ343497A3 (en) 1998-05-13
EP0838616A2 (en) 1998-04-29
ATA187996A (en) 1998-02-15
AT404290B (en) 1998-10-27

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