EP3344881B1 - Vérin de blocage hydromécanique et système de commande hydraulique pour l'actionner - Google Patents

Vérin de blocage hydromécanique et système de commande hydraulique pour l'actionner Download PDF

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Publication number
EP3344881B1
EP3344881B1 EP17791292.0A EP17791292A EP3344881B1 EP 3344881 B1 EP3344881 B1 EP 3344881B1 EP 17791292 A EP17791292 A EP 17791292A EP 3344881 B1 EP3344881 B1 EP 3344881B1
Authority
EP
European Patent Office
Prior art keywords
locking
pressure chamber
valve
piston
cylinder according
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.)
Active
Application number
EP17791292.0A
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German (de)
English (en)
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EP3344881A1 (fr
Inventor
Norbert Beinl
Hubert Reiser
Rainer Schenk
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.)
Fbr Facondrehteile GmbH
Original Assignee
Fbr Facondrehteile 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.)
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Publication of EP3344881A1 publication Critical patent/EP3344881A1/fr
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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
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
    • 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
    • F15B11/003—Systems with load-holding valves
    • 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
    • F15B15/264—Screw mechanisms attached to the piston
    • 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
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3052—Shuttle valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40584—Assemblies of multiple valves the flow control means arranged in parallel with a check 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure

Definitions

  • the invention relates to a hydromechanical locking cylinder - which is also referred to as a locking cylinder - according to the preamble of claim 1 and a hydraulic control system for its actuation according to claim 12.
  • a hydromechanical locking cylinder is from the EP 1 864 024 B1 known.
  • a rotary sleeve connected to a spindle for locking the spindle is secured by radially engaging locking pin.
  • the locking pins are biased by compression springs into their engaged position and disengaged by acting on the locking pin pressure medium.
  • EP 2 039 944 A2 is a generic hydromechanical locking cylinder known.
  • the locking bolt is actuated by means of a locking slide, which is movable by means of an additional hydraulically actuated control.
  • the actuating mechanism for the locking slide is an additional overhead on components.
  • the object of the invention is to provide a hydromechanical locking cylinder with a simplified structure.
  • the locking cylinder according to the invention is characterized in that in a one-piece design or firmly connected two-part design of the spindle with a locking part of the locking engagement by means of at least one frontally arranged on the locking part, radially and axially open Arret michsnut the front side with fixed locking bolt.
  • no moving parts are required between the spindle and locking part.
  • the frontal engagement allows a sliding, low-wear locking or unlocking by means of only a very slight axial lifting movement of the locking part.
  • the detent grooves provided for this purpose on the locking part are preferably provided with at least one chamfer and directly adjoin one another in such a way that locking pins provided in the region of a cylinder bottom engage in each rotational position of the spindle even with very little rotation. This ensures a quick and low-wear inlet and outlet of the locking bolt in the locking grooves.
  • a one-sided load of a single locking bolt and the associated Danger of breakage and jamming, as in an engagement of several radially movable locking bolt (see EP 1 864 024 B1 ) occur again and again by a minimal offset in the movement is excluded in the locking cylinder according to the invention. As a result, its reliability is significantly increased.
  • the locking grooves are chamfered on both sides, so that the engagement and disengagement of the locking bolt takes place equally easily in both directions of rotation.
  • three locking bolts are arranged at 120 ° offset on the cylinder bottom.
  • the number of locking grooves on the locking part is preferably a natural multiple of the number of locking bolts, that is, for example, preferably six or better even nine locking grooves in the case of three locking bolts.
  • the locking cylinder according to the invention has a separate from a working space for actuating the piston unlocking pressure chamber in the region of the front end of the locking part.
  • the hydromechanical locking cylinder is preferably provided with a hydraulic control system, which acts on a valve for acting on the working space only with the required working pressure for lifting the piston when the locking member is lifted by the pressure in the unlocking pressure chamber from the locking bolt.
  • a valve for acting on the working pressure chamber is preferably counter-motionically coupled with a valve for acting on or relieving the unlocking pressure chamber.
  • all valves used for actuating the piston and the locking part are in a hydraulic control block integrated, which is preferably flanged on the outer casing or housing of the locking cylinder.
  • the locking cylinder according to the invention can be designed as a single-acting plunger cylinder but also as a double-acting cylinder. Described is in the embodiments, only a single-acting locking cylinder. For a conversion into a double-acting cylinder, the working pressure chamber in the upper area only needs to be connected to another hydraulic line.
  • An in Fig. 1 illustrated locking cylinder 10 is formed by a cylinder tube 12 that is closed at the top of a termination part 11 and bottom of a bottom 14.
  • the end part 11 is screwed by means of a thread 1110 with the cylinder tube 12 and additionally sealed by means of a seal 1112.
  • a housing 14 including the bottom 14 wherein the connection also preferably via a unspecified screw thread and an additional seal by means of at least one unspecified seal is done.
  • a needle bearing 33 covered upwardly by a support disk 330 is inserted when screwing in.
  • a fastening eye 15 is designed for connection, for example, to a machine frame, to a vehicle frame or to a foundation.
  • a tubular piston rod 20 is arranged, which is provided at its lower end with a piston 22.
  • the upper end of the piston rod 20 is provided with a mounting eye 21.
  • the piston 22 has an internal thread 23 that is in engagement with an external thread 31 of a spindle 30 arranged centrally in the cylinder tube 12.
  • the thread 23 or 31 is preferably designed as a trapezoidal thread. Below the piston 22, this limits a working pressure space 24 in conjunction with the inner wall of the cylinder tube 12.
  • the spindle 30 is fixedly connected to a locking part 32 that connects down to this.
  • the locking member 32 has on its downwardly directed end side a plurality of radially outwardly open and also in the axial direction downwardly open locking grooves 34.
  • the locking grooves 34 are in FIG. 1 with locking bolt 18 in engagement, which are fixedly arranged above the bottom 14 substantially horizontally laterally in the housing 19.
  • the locking grooves 34 are in detail in the FIGS. 2 to 4 shown.
  • the locking member 32 is as far axially movable in a separate from the working pressure chamber 24 unlocking pressure chamber 16 when acted upon by means of a Entriegelungs Kunststoffs that the Arret michsnuten 34 can get out of engagement with the locking pin 18.
  • the underside of the needle bearing 33 forms a rotatable stop for the locking part 32.
  • the locking part 32 allows a rotation of the spindle 30 to, which causes an axial displacement of the piston 22 and the piston rod 20 upward due to the hydraulic pressure in the working pressure chamber 24 and the engagement of the external thread 31 in the internal thread 23.
  • a locking member 32 is shown in detail.
  • Several on the circumference uniformly distributed locking grooves 34 have in this embodiment on one side a chamfer 36, on which the locking member 32 lifts when subjected to an unlocking of the locking bolt 18 and again slidably engaged in a reverse locking.
  • the locking member 32 has a plurality of recesses 38 in the middle region.
  • a magnetic switch 13 is arranged on the housing 19, which measures the number of revolutions of the locking part 32 and thereby determines the exact stroke position of the piston 20.
  • Fig. 3 an alternative embodiment of a locking member 32 is shown, in which the locking grooves 34 are provided on both sides with chamfer 36. This embodiment is preferred because the engagement of the locking pin 18 or disengaged with the locking pin 18 in both directions is sliding.
  • nine locking grooves 34 are arranged uniformly distributed in the embodiment shown on the circumference. In this case, three offset by 120 ° to each other arranged locking pin 18 for engagement in these locking grooves 34 are provided.
  • the piston 22 thus performs at a locking of the locking member 32 only a maximum of 1/9 of a pitch of its thread as expiring axial movement. These are in practice only a few millimeters.
  • FIG. 4 is one also in the embodiment according to Fig. 2 existing bypass bore 35 indicated schematically.
  • This provided in the locking part 32 at least one bypass hole communicates with an arranged in the region of the locking grooves 34 inlet opening 35X with the below the first seal 161 arranged unlocking pressure chamber 16.
  • the side of the locking part 32 provided outlet opening 35S is locked in the locking position by resting against the wall. After lifting off the locking part 32 of the locking pin 18, the outlet opening 35 S communicates with the hydraulic line S, so that the pressure applied in the unlocking pressure chamber 16 pressure on the acting as a control pressure line hydraulic line S also for driving the valves 110 and 120 is effective.
  • a first hydraulic line A opens with a line branch A112.
  • this junction is indicated only schematically by the arrow A.
  • a hydraulic line X opens in the lower part of the locking cylinder 10 of the unlocking pressure chamber 16 in the below the first seal 161, a hydraulic line X and between the first seal 161 and the second seal 162, a further hydraulic line S opens.
  • these confluence points are indicated only schematically by the arrow X and S.
  • the hydraulic lines A, X and S are represented by a in the right part of the FIG. 5 controlled hydraulic control block 102, which forms a hydraulic control system 100 in conjunction with a multi-way valve 105 and controlled by this controlled hydraulic lines A and B.
  • the hydraulic control block 102 is in FIG. 1 flanged to the right side of the housing 19.
  • valves 110, 120 and 130 are arranged in the hydraulic control block 102.
  • the first valve 110 is connected on the right side via a branch line A110 with the first hydraulic line A.
  • the first valve 110 is connected on the left side via the branch line A112 with the working pressure chamber 24.
  • the first valve 110 is connected to the hydraulic line S and on its upper side, the first valve 110 is connected via a control line 118 to the second valve 120, wherein the control line 118 causes a mutually opposite circuit of the valves 110 and 120.
  • the second valve 120 is connected on its left side via a branch line B120 with the second hydraulic line B.
  • the second valve 120 is connected via a line branch B130 to the third valve 130, which on the input side has a shuttle valve 134 in this area, which inhibits or releases flow to the line branch B130.
  • the line branch B120 and the line branch B130 are additionally connected to one another by a bypass line 124 which bypasses the second valve 120 and into which a check valve 122 blocking the flow to the line branch B130 is inserted.
  • the third valve 130 is connected at its bottom via a check valve 132 with the first hydraulic line A, wherein the check valve 132 allows only a flow from the first hydraulic line A to the third valve 130.
  • the third valve 130 On its left side, the third valve 130 is connected to the hydraulic line X leading to the unlocking pressure chamber 16.
  • the first hydraulic line A is pressurized.
  • the third valve 130 controls this pressure in the hydraulic line X, whereby the check valve 132 opens and the shuttle valve 134 blocks the path to the branch line 132.
  • the hydraulic line S is in this case still depressurized, so that the first valve 110 still prevents the connection from the line branch A110 to the line branch A112. Therefore, starting from the hydraulic line A, initially only one unlocking pressure is built up in the unlocking pressure chamber 16, but still no pressure in the working pressure chamber 24. The unlocking is thus unequivocally uncoupled from the working stroke.
  • the unlocking pressure fed in via the hydraulic line X into the unlocking pressure chamber 16 causes the locking part 32 to be lifted off the locking bolt 18.
  • the hydraulic line S acting as the control pressure line becomes the unlocking pressure via the bypass bore 35 and its free outlet opening 35S applied.
  • This controls the first valve 110 in the through position, in which the line branch A110 is connected to the line branch A112.
  • the required working pressure is now also fed into the working pressure chamber 24 from the first hydraulic line A.
  • the piston 22 is thereby moved by rotation of the spindle 30 upwards.
  • the second hydraulic line B is pressurized by the multi-way valve 105 and the first hydraulic line A is simultaneously relieved.
  • the pressure is fed via the third valve 130 into the hydraulic line X.
  • the hydraulic line S is also subjected to pressure simultaneously via the unlocking pressure chamber 16.
  • This pressure causes a reversal of the first valve 110 and at the same time via the control line 118, a reversal of the second valve 120.
  • the instantaneous mechanical lock provides the locking grooves 34 engaged with the locking pins 18 for safe interception of the load in any intermediate position.
  • the bypass line 122 with the opening check valve 122 provides for a controlled pressure reduction after completion of a lifting or lowering operation.
  • the pending in the unlocking pressure chamber 16 pressure is reduced via the hydraulic line X, via the third valve 130 with its now upwardly opening shuttle valve 134 and via the bypass line 122 to the then pressureless hydraulic line B120 and B out.
  • the inventive innovative hydraulic control system 100 thus provides in a simple manner for a very advantageous, minimizing wear decoupling of the unlocking of the working stroke of a hydromechanical locking cylinder.

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

Claims (13)

  1. Cylindre de verrouillage hydromécanique (10) doté d'un piston (22) qui peut être actionné hydrauliquement dans un tube cylindrique (12) et qui est en prise, grâce à un filetage (23), avec un filetage (31) disposé sur une tige (30), dans lequel la tige (30) peut être bloquée à l'aide d'un élément de verrouillage (32) pour interrompre un mouvement du piston (22), la tige (30) et l'élément de verrouillage (32) étant formés d'une seule pièce ou étant fixés rigidement l'une à l'autre et l'élément de verrouillage (32) étant réalisé pouvant être mise en prise avec au moins un boulon de verrouillage (18) faisant partie du cylindre de verrouillage grâce à au moins une rainure de verrouillage (34) disposée du côté frontal et ouverte radialement et axialement, caractérisé en ce que le boulon de verrouillage (18) est fixé rigidement.
  2. Cylindre de verrouillage selon la revendication 1, caractérisé en ce qu'une pluralité de rainures de verrouillage (34) sont disposés sur la circonférence du côté frontal de l'élément de verrouillage (32) à une distance uniforme les unes des autres.
  3. Cylindre de verrouillage selon l'une des revendications précédentes, caractérisé en ce qu'une pluralité de boulons de verrouillage (18) sont prévus à intervalles réguliers les uns des autres.
  4. Cylindre de verrouillage selon la revendication 3, caractérisé en ce que le nombre de rainures de verrouillage (34) correspond à un multiple entier du nombre de boulons de verrouillage (18).
  5. Cylindre de verrouillage selon l'une des revendications précédentes, caractérisé en ce que les rainures de verrouillage (34) sont pourvues d'un chanfrein (36) sur au moins un côté dans la direction circonférentielle.
  6. Cylindre de verrouillage selon la revendication 5, caractérisé en ce que les rainures de verrouillage (34) sont respectivement munies d'un chanfrein (36) des deux côtés dans la direction circonférentielle.
  7. Cylindre de verrouillage selon l'une des revendications précédentes, caractérisé en ce qu'au moins un joint (161, 162) est disposé sur la paroi intérieure du tube cylindrique (12) dans la zone de l'élément de verrouillage (32), lequel joint sépare une chambre de pression de travail (24) limitant le mouvement du piston (22) d'une chambre de pression de déblocage (16) limitant le mouvement de l'élément de verrouillage (32).
  8. Cylindre de verrouillage selon la revendication 7, caractérisé en ce que la chambre de pression de déverrouillage (16) est fixée à deux conduites hydrauliques (S, X).
  9. Cylindre de verrouillage selon la revendication 8, caractérisé en ce qu'au moins l'une des conduites hydrauliques (S, X) fixées à la chambre de pression de déverrouillage (16) peut être fixée à au moins une soupape (110 ; 120 ; 130) qui commande la pressurisation de la chambre de pression de travail (24).
  10. Cylindre de verrouillage selon la revendication 9, caractérisé en ce que les deux conduites hydrauliques (S, X) peuvent être fixées dans la position de déblocage grâce à au moins un alésage de dérivation (35) disposé dans l'élément de verrouillage (32).
  11. Cylindre de verrouillage selon l'une des revendications précédentes, caractérisé en ce qu'un roulement à aiguilles (33), formant une butée pour l'élément de verrouillage (32) dans la position de déblocage, est disposé sur le tube cylindrique (12).
  12. Ensemble comprenant un cylindre de verrouillage (10) selon l'une des revendications précédentes et un système de commande hydraulique (100), dans lequel le système de commande (100) comprend au moins une soupape (110) destinée à agir sur une chambre de pression de travail (24) permettant d'actionner le piston (22) et couplée de manière à se déplacer dans le sens contraire d'une soupape (120) pour agir sur ou décharger une chambre de pression (16) destinée à actionner l'élément de verrouillage (32) qui freine ou relâche le mouvement de levage du piston (22).
  13. Ensemble selon la revendication 12, caractérisé en ce que toutes les soupapes (110 ; 120 ; 130) permettant d'actionner le piston (22) et l'élément de verrouillage (32) sont intégrés dans un bloc de commande hydraulique (112) pouvant être bridé sur la gaine extérieure ou le boîtier (19) du cylindre de verrouillage (10).
EP17791292.0A 2016-10-10 2017-10-05 Vérin de blocage hydromécanique et système de commande hydraulique pour l'actionner Active EP3344881B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016119251.1A DE102016119251A1 (de) 2016-10-10 2016-10-10 Hydromechanischer Verriegelungszylinder und hydraulisches Steuersystem zu dessen Betätigung
PCT/EP2017/075297 WO2018069128A1 (fr) 2016-10-10 2017-10-05 Vérin de blocage hydromécanique et système de commande hydraulique pour l'actionner

Publications (2)

Publication Number Publication Date
EP3344881A1 EP3344881A1 (fr) 2018-07-11
EP3344881B1 true EP3344881B1 (fr) 2019-05-22

Family

ID=60190796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17791292.0A Active EP3344881B1 (fr) 2016-10-10 2017-10-05 Vérin de blocage hydromécanique et système de commande hydraulique pour l'actionner

Country Status (3)

Country Link
EP (1) EP3344881B1 (fr)
DE (1) DE102016119251A1 (fr)
WO (1) WO2018069128A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR102020000380A2 (pt) 2019-01-09 2020-09-24 Cnh Industrial America Llc Sistema de travamento de cilindro
CN114508521A (zh) * 2022-03-04 2022-05-17 烟台星辉航空液压有限公司 一种用于任意位置抱紧轴类的锁紧装置

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
NL7004075A (fr) * 1970-03-20 1971-09-22
DE20216197U1 (de) * 2002-10-22 2004-03-04 Bümach Engineering International B.V. Hydraulischer Arbeitszylinder
DE10356598B3 (de) * 2003-12-04 2005-06-02 Neumeister Hydraulik Gmbh Verriegelungszylinder
DE10356597B3 (de) * 2003-12-04 2005-06-02 Neumeister Hydraulik Gmbh Verriegelungszylinder
DE10356596B3 (de) * 2003-12-04 2005-06-02 Neumeister Hydraulik Gmbh Verriegelungszylinder
DE102004022203B3 (de) * 2004-05-05 2005-08-11 Neumeister Hydraulik Gmbh Verriegelungszylinder mit Gewinde-Freilauf
DE102005015059A1 (de) * 2005-03-31 2006-10-05 Aros Hydraulik Gmbh Verriegelbarer Arbeitszylinder
DE102007024736B3 (de) * 2007-05-25 2008-06-12 Neumeister Hydraulik Gmbh Verriegelungszylinder mit Fluidgleitlagerung
AT505793B1 (de) * 2007-09-21 2010-03-15 Weber Hydraulik Gmbh Zylinder-kolben-einheit mit sperranordnung

Non-Patent Citations (1)

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Title
None *

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Publication number Publication date
EP3344881A1 (fr) 2018-07-11
WO2018069128A1 (fr) 2018-04-19
DE102016119251A1 (de) 2018-04-12

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