EP0377898A1 - Vérin à un étage avec dispositif de verrouillage pour la tige - Google Patents

Vérin à un étage avec dispositif de verrouillage pour la tige Download PDF

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Publication number
EP0377898A1
EP0377898A1 EP89124047A EP89124047A EP0377898A1 EP 0377898 A1 EP0377898 A1 EP 0377898A1 EP 89124047 A EP89124047 A EP 89124047A EP 89124047 A EP89124047 A EP 89124047A EP 0377898 A1 EP0377898 A1 EP 0377898A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
valve
clamping
piston rod
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
EP89124047A
Other languages
German (de)
English (en)
Other versions
EP0377898B1 (fr
Inventor
Günter Bartmann
Gerd BRÄCKELMANN
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.)
Montanhydraulik GmbH
Original Assignee
Montanhydraulik GmbH
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 Montanhydraulik GmbH filed Critical Montanhydraulik GmbH
Priority to AT89124047T priority Critical patent/ATE66052T1/de
Publication of EP0377898A1 publication Critical patent/EP0377898A1/fr
Application granted granted Critical
Publication of EP0377898B1 publication Critical patent/EP0377898B1/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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/262—Locking mechanisms using friction, e.g. brake pads
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • F15B13/015—Locking-valves or other detent i.e. load-holding devices using an enclosed pilot flow valve
    • 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
    • F15B15/202—Externally-operated valves mounted in or on the actuator

Definitions

  • the invention relates to a single-stage cylinder operable in differential circuit with a piston rod clamping device of the type outlined in the preamble of claim 1.
  • a piston rod clamping device of the type outlined in the preamble of claim 1.
  • the loosening of the clamping device which is a prerequisite for the method of rolling in the cylinder and the associated extension or retraction of the piston rod, is achieved by feeding pressure medium into an independent pressure space that is shielded from the annular space of the cylinder causes the clamping cone, under the action of which the clamping cone is displaced out of the clamping position against the pressure of the compression spring which converts and holds it in the clamping position while removing the clamping.
  • This requires an independent pressure medium supply line that extends along the circumference of the cylinder into the area of the clamping device at the head of the cylinder and then also an independent control element for this.
  • the object of the invention is to design such a cylinder provided with a piston rod clamping device in a structurally simpler manner, in which case there is also a seamless transition from the system between releasing the clamping device and moving the piston rod or the piston results.
  • the object is achieved according to the invention in a generic cylinder in such a way that the chamber receiving the components of the clamping device is connected on the cylinder side to the annular space of the cylinder and As a valve to be inserted into the extension pressure medium line, a preload valve with load pressure compensation for both flow directions and with a preload which at least largely compensates for the force of the compression spring acting on the clamping cone is provided.
  • the piston rod clamping device is at least largely loosened when a driving process is initiated by the pressure medium pressure building up in the annular space of the cylinder, which continues into this chamber through the connection to the components of the clamping device and the loosening of the clamping cone and so that the clamping piece then also acts against the pressure of the adjusting spring acting on the clamping cone before the pressure medium pressure applied to the working piston of the cylinder comes into play in the sense of the piston movement.
  • the valve securing the extension pressure medium line can then also be a preload brake valve.
  • the closing body of the valve is provided with control grooves.
  • the preload valve securing the extension pressure medium line is expediently adjustable.
  • a preload controllable pressure compensation valve is assigned to the preload valve.
  • the single-stage cylinder consists of the actual cylinder 11, in which the piston 12 can be displaced in the direction of the double arrow A.
  • the piston rod 121 extends from the piston 12 and protrudes from the cylinder 11 through the cylinder head 112 on the side facing away from the cylinder base 111.
  • Piston 12 and piston rod 121 form the so-called cylinder pressure chamber 113 in the cylinder 11 on the one hand and the so-called annular chamber 114 on the other hand.
  • the outlet pressure medium line 13 is connected to the cylinder pressure chamber 113, on the bottom side, and the inlet pressure medium line 14 is connected to the annular space 114 directly below the cylinder head 112.
  • Circuit diagram I) and switchable for extending or retracting in a corresponding manner circuit diagrams II and III).
  • the piston rod clamping device is integrated in the cylinder head 112. It consists in a manner known per se from a clamping piece 171, a clamping cone 172 and a pressure spring 173 which are accommodated in the chamber 17, 17 'formed in the cylinder head 112, the leading on the piston rod 121 being overlapped by the clamping cone 172 Axial direction fixed clamping piece 171 comes under the action of the compression spring 173 in the direction of arrow B clamping cone 172 by the clamping cone 172 clamping against the piston rod 121 to the system.
  • the portion 17 of the chamber 17, 17 ' is directly connected to the annular space 114 of the cylinder 11, from the portion 17' is a ventilation line 174.
  • the preload valve therefore only opens when the pressure medium pressure applied to the control piston 21 via the cable 14, 141 outweighs the set spring force (the preload).
  • the spring force is set so that the pressure medium pressure which is present at the same time on the connecting cone 172 and the clamping piece 171 of the clamping device via the connecting line 18 first presses the clamping cone 172 against the pressure of those acting on it
  • the plunger 211 of the control piston 21 acts directly on the component 191 of the closing body 191 of the preload valve 19, the closing body 191 and the valve 194 being in pressure compensation via the bore 196 with reference to the pressure medium pressure in the cylinder pressure chamber 113.
  • a compensating valve is provided, the closing body 198 of which is removed from its closed position from the offset end 212 of the plunger 211 emanating from the control piston 21 when the control piston 21 is pressurized with pressure medium to bring about pressure compensation at the preload valve.
  • a ventilation line on the control piston 21 is designated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jigs For Machine Tools (AREA)
  • Actuator (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Fluid-Pressure Circuits (AREA)
EP89124047A 1989-01-07 1989-12-28 Vérin à un étage avec dispositif de verrouillage pour la tige Expired - Lifetime EP0377898B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89124047T ATE66052T1 (de) 1989-01-07 1989-12-28 Einstufiger zylinder mit kolbenstangenklemmvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3900344 1989-01-07
DE3900344A DE3900344A1 (de) 1989-01-07 1989-01-07 Einstufiger zylinder mit kolbenstangen-klemmvorrichtung

Publications (2)

Publication Number Publication Date
EP0377898A1 true EP0377898A1 (fr) 1990-07-18
EP0377898B1 EP0377898B1 (fr) 1991-08-07

Family

ID=6371704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89124047A Expired - Lifetime EP0377898B1 (fr) 1989-01-07 1989-12-28 Vérin à un étage avec dispositif de verrouillage pour la tige

Country Status (3)

Country Link
EP (1) EP0377898B1 (fr)
AT (1) ATE66052T1 (fr)
DE (2) DE3900344A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0589863A1 (fr) * 1992-09-15 1994-03-30 Hoerbiger Ventilwerke Aktiengesellschaft Vérin hydraulique
DE4421861C2 (de) * 1993-10-07 1999-07-01 Hoerbiger Gmbh Hydraulikzylinder
DE102005001234A1 (de) * 2005-01-11 2006-07-20 Wabco Gmbh & Co.Ohg Bremszylinder mit Parkbremsfunktion
EP2345815A1 (fr) * 2010-01-14 2011-07-20 Bosch Rexroth Oil Control S.p.A. Vanne hydraulique pour supporter et contrôler la descente d'une charge

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4445960C1 (de) * 1994-12-22 1996-07-11 Grau Gmbh Bremszylinder für eine druckluftbetätigte Fahrzeugbremse
JP7211687B2 (ja) * 2018-10-17 2023-01-24 キャタピラー エス エー アール エル 降下防止弁装置、ブレード装置および作業機械

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3498182A (en) * 1968-05-07 1970-03-03 Sheffer Corp The Locking cylinder
FR2248229A1 (en) * 1973-10-17 1975-05-16 Samiia Hydraulic winch safety device - has adjustable spring-loaded throttle in fluid return passage used when lowering
EP0097739A1 (fr) * 1982-06-30 1984-01-11 Hydro-Gerätebau GmbH & Co. KG Hebezeuge Dispositif d'appui hydraulique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8505101U1 (de) * 1985-02-22 1986-02-27 Montan-Hydraulik GmbH, 4755 Holzwickede Kolbenstangen-Klemmvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3498182A (en) * 1968-05-07 1970-03-03 Sheffer Corp The Locking cylinder
FR2248229A1 (en) * 1973-10-17 1975-05-16 Samiia Hydraulic winch safety device - has adjustable spring-loaded throttle in fluid return passage used when lowering
EP0097739A1 (fr) * 1982-06-30 1984-01-11 Hydro-Gerätebau GmbH & Co. KG Hebezeuge Dispositif d'appui hydraulique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0589863A1 (fr) * 1992-09-15 1994-03-30 Hoerbiger Ventilwerke Aktiengesellschaft Vérin hydraulique
DE4421861C2 (de) * 1993-10-07 1999-07-01 Hoerbiger Gmbh Hydraulikzylinder
DE102005001234A1 (de) * 2005-01-11 2006-07-20 Wabco Gmbh & Co.Ohg Bremszylinder mit Parkbremsfunktion
US8944527B2 (en) 2005-01-11 2015-02-03 Wabco Gmbh Brake cylinder with parking brake function
EP2345815A1 (fr) * 2010-01-14 2011-07-20 Bosch Rexroth Oil Control S.p.A. Vanne hydraulique pour supporter et contrôler la descente d'une charge

Also Published As

Publication number Publication date
DE3900344A1 (de) 1990-07-12
ATE66052T1 (de) 1991-08-15
DE58900207D1 (de) 1991-09-12
EP0377898B1 (fr) 1991-08-07

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