EP3447313A1 - Vérin à position intermédiaire et procédé d'actionnement d'un tel vérin - Google Patents

Vérin à position intermédiaire et procédé d'actionnement d'un tel vérin Download PDF

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Publication number
EP3447313A1
EP3447313A1 EP18189854.5A EP18189854A EP3447313A1 EP 3447313 A1 EP3447313 A1 EP 3447313A1 EP 18189854 A EP18189854 A EP 18189854A EP 3447313 A1 EP3447313 A1 EP 3447313A1
Authority
EP
European Patent Office
Prior art keywords
piston
intermediate position
cylinder
fluid
actuating
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Withdrawn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
EP18189854.5A
Other languages
German (de)
English (en)
Inventor
Felix Weber
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.)
Putzmeister Engineering GmbH
Original Assignee
Putzmeister Engineering 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 Putzmeister Engineering GmbH filed Critical Putzmeister Engineering GmbH
Publication of EP3447313A1 publication Critical patent/EP3447313A1/fr
Withdrawn legal-status Critical Current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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
    • F15B11/121—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions

Definitions

  • an identical intermediate position must be approached as on the way back of the piston on the way out of the piston.
  • the fluid is displaced by a first channel and displaced on the return path of the piston through a second channel.
  • the first channel may be closed by a sealing engagement between the piston and the cylinder wall when the piston reaches the intermediate position on the way there.
  • the second channel may be closed by a sealing engagement between the piston and the cylinder wall when the piston reaches the intermediate position on the return path.
  • the intermediate position on the way from the intermediate position on the return path would usually deviate.
  • the extent of the deviation may in particular depend on the extent that the piston has along its direction of movement. Included in the disclosure content as independent inventive idea are those embodiments in which the intermediate position deviates on the way back from the intermediate position on the way back.
  • the intermediate position can be arranged centrally between the two end positions, so that the intermediate position has an identical distance to each of the two end positions. It is also possible that the intermediate position has a greater distance to one of the end positions than to the other.
  • the adjusting cylinder according to the invention can be designed as a linear drive.
  • the piston of the linear drive may have a circular cross section and be designed to seal with the cylinder over its entire circumferential surface.
  • This embodiment can be designed as a linear drive or as a rotary drive.
  • a first outlet opening 26 and a second outlet opening 27 are formed in the cylinder wall 15.
  • a first outlet valve 28 is connected to the first outlet opening 26 .
  • a second outlet valve 29 is connected to the second outlet opening 27 .
  • the exhaust valves 28, 29 each have two valve states. In a first valve state 30, the outlet valve 28, 29 releases a connection between the outlet opening 26, 27 and the hydraulic fluid tank 32. In the second switching state 31, the outlet valve 28, 29 closes the outlet opening 26, 27.
  • the first exhaust valve 28 is brought into the closed state 31.
  • the first control valve 17 is brought into the state 21 in which the first control valve 17 connects to the hydraulic fluid tank 32.
  • the piston 14 is set in motion by the hydraulic fluid flowing in from the second control valve 18, whereby hydraulic fluid passes through the second control valve 17 is displaced into the hydraulic fluid tank 32. The movement ends in an adjacent to the first control valve 17 end position.
  • FIG. 6 an alternative embodiment of a hydraulic cylinder according to the invention is shown.
  • the hydraulic cylinder comprises a piston 14 with a stepped cross-section.
  • the section of the piston 14 with the largest cross section is guided in a section 56 of the cylinder wall 15.
  • two outlet openings 46, 47, two connection openings 50, 51 and two additional openings 59, 60 are formed.
  • To the piston 14, starting from the in FIG. 6A shown in position to move, is supplied via the first port 50 hydraulic fluid.
  • the piston 14 moves to the right and displaces hydraulic fluid through the port 51 therethrough.
  • About check valves 58 also enters through the additional opening 59 and through the outlet port 46 hydraulic fluid in the hydraulic cylinder.
  • the outlet opening 47 and the additional opening 60 are closed.
  • the hydraulic cylinder comprises a first end-side control valve 17 and a second end-side control valve 18.
  • the control valves 17, 18 each comprise three valve states. In a first valve state 19, the control valve releases a connection between a pump 22 and a first connection opening 23 or a second connection opening 24 arranged in the cylinder wall 15. In a second valve state 20, the control valve 17, 18 is closed. In a third valve state 21, the control valve 17, 18 is a connection between the first port opening 23 and the second port opening 24 and a hydraulic fluid tank 32 free.
  • a first outlet opening 26 and a second outlet opening 27 are also formed.
  • an outlet valve 61 is connected in the form of a 3/3-way valve. Either one of the outlet openings 26, 27 can be connected to the hydraulic fluid tank 32 with the outlet valve 61, or both outlet openings 26, 27 can be closed.
  • the rotary drive comprises two cylinder walls 65, which cooperate with two sealing surfaces of the rotary piston 64.
  • the angle of rotation between the two end positions of the rotary piston is less than 180 °.
  • the first control valve 17 is connected to the first connection openings 23 of both cylinder walls 65.
  • the second control valve 18 is connected to the second connection openings 24 of both cylinder walls.
  • the 3/3-way valve 61 is connected to the two first outlet openings 26 and the two second outlet openings 27, so that they are each placed in the same switching state.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
EP18189854.5A 2017-08-21 2018-08-21 Vérin à position intermédiaire et procédé d'actionnement d'un tel vérin Withdrawn EP3447313A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017214526.9A DE102017214526A1 (de) 2017-08-21 2017-08-21 Fluidgetriebener Stellzylinder mit einer Zwischenposition und Verfahren zum Betätigen eines solchen Stellzylinders

Publications (1)

Publication Number Publication Date
EP3447313A1 true EP3447313A1 (fr) 2019-02-27

Family

ID=63407061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18189854.5A Withdrawn EP3447313A1 (fr) 2017-08-21 2018-08-21 Vérin à position intermédiaire et procédé d'actionnement d'un tel vérin

Country Status (2)

Country Link
EP (1) EP3447313A1 (fr)
DE (1) DE102017214526A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022157013A1 (fr) * 2021-01-19 2022-07-28 Putzmeister Engineering Gmbh Soupape pour matière épaisse et procédé d'actionnement d'une soupape pour matière épaisse

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR848883A (fr) * 1938-01-14 1939-11-08 Commande d'un piston servomoteur
US2954755A (en) * 1957-10-23 1960-10-04 Ibm Hydraulic positioning device
JPH03305A (ja) * 1989-05-26 1991-01-07 F I T:Kk シリンダ
DE4117735C1 (fr) * 1991-05-30 1992-10-29 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
CN103452945A (zh) * 2013-08-23 2013-12-18 浙江亿太诺气动科技有限公司 一种动态平衡多工作位置气缸

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2050417A1 (de) * 1970-10-14 1972-04-20 Licentia Gmbh Hydrostatischer oder pneumatischer Positionierantrieb
DE29518636U1 (de) * 1995-11-24 1997-03-20 Heuft Systemtechnik Gmbh, 56659 Burgbrohl Vorrichtung zum Ausleiten von einzelnen rotationssymmetrischen Behältern aus einem unter Staudruck geförderten Strom der rotationssymmetrischen Behälter und Zylinder mit gesteuert ausfahrbarem Kolben
SE536688C2 (sv) * 2012-10-03 2014-05-27 Scania Cv Ab Manövercylinder för en växellåda, en växellåda med sådan manövercylinder, samt ett fordon med en sådan växellåda

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR848883A (fr) * 1938-01-14 1939-11-08 Commande d'un piston servomoteur
US2954755A (en) * 1957-10-23 1960-10-04 Ibm Hydraulic positioning device
JPH03305A (ja) * 1989-05-26 1991-01-07 F I T:Kk シリンダ
DE4117735C1 (fr) * 1991-05-30 1992-10-29 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
CN103452945A (zh) * 2013-08-23 2013-12-18 浙江亿太诺气动科技有限公司 一种动态平衡多工作位置气缸

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022157013A1 (fr) * 2021-01-19 2022-07-28 Putzmeister Engineering Gmbh Soupape pour matière épaisse et procédé d'actionnement d'une soupape pour matière épaisse

Also Published As

Publication number Publication date
DE102017214526A1 (de) 2019-02-21

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