EP1936208B1 - Dispositif de levage actionné par pression fluidique avec un axe fileté autobloquant - Google Patents

Dispositif de levage actionné par pression fluidique avec un axe fileté autobloquant Download PDF

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Publication number
EP1936208B1
EP1936208B1 EP20070021865 EP07021865A EP1936208B1 EP 1936208 B1 EP1936208 B1 EP 1936208B1 EP 20070021865 EP20070021865 EP 20070021865 EP 07021865 A EP07021865 A EP 07021865A EP 1936208 B1 EP1936208 B1 EP 1936208B1
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EP
European Patent Office
Prior art keywords
piston rod
pressure flow
threaded spindle
pressure
consumer
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.)
Expired - Fee Related
Application number
EP20070021865
Other languages
German (de)
English (en)
Other versions
EP1936208A2 (fr
EP1936208A3 (fr
Inventor
Josef Büter
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.)
Buemach Engineering International BV
Original Assignee
Buemach Engineering International BV
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 Buemach Engineering International BV filed Critical Buemach Engineering International BV
Publication of EP1936208A2 publication Critical patent/EP1936208A2/fr
Publication of EP1936208A3 publication Critical patent/EP1936208A3/fr
Application granted granted Critical
Publication of EP1936208B1 publication Critical patent/EP1936208B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F15B15/264—Screw mechanisms attached to the piston

Definitions

  • the invention relates to a pressure-medium-operated lifting device which can be used in hydraulically operated lifting devices, in which in the case of failure of the pressure energy, a mechanical blocking of the movement of a piston rod is required.
  • the barrier systems known from the prior art for blocking the movement of a piston rod can be divided into two main groups.
  • the first group can be associated with such locking systems, in which a locking device interacts directly with the piston rod of a linear pressure electricity consumer.
  • a locking device for a continuously variable cylinder with a mechanical locking device which is able to keep its position under load in any intermediate position reliable.
  • This effect is achieved by means of a hollow piston rod with an inner profiling, in which a displaceable, axially spring-loaded rod with a recirculating ball channel with balls, which engage in the profiling of the piston rod, is arranged.
  • the rod is connected to an actuating piston in an actuating cylinder, which ververschiebt the rod when pressurized with the pressure medium of the working cylinder so that the balls can rotate freely and are brought in the event of pressure drop in the blocking position, thus the piston rod is prevented from further movement.
  • clamping heads which act on the piston rod and prevent their movement
  • Clamping heads are coupled as external units with a working cylinder, the clamping element, a spring-biased and displaceable by a servo piston for unlocking clamping body, acts in case of failure of the pressure of a medium from the outside to the piston rod and this fixed.
  • the device for clamping an axially moving rod is based DE 37 07 046 A1 ,
  • the clamping takes place by means of a clamping sleeve with outer cone, on which the inner cone of a spring-biased, axially displaceable piston acts.
  • the pressure of a fluid is applied to the piston, whereby the clamping sleeve displaced against the spring bias, the clamping is released and the rod is thereby axially displaceable.
  • a working cylinder with a hollow piston rod, the blocking surface is arranged inside, is in the document DE 33 07 644 A1 described.
  • a device for frictional clamping is installed, wherein clamping segments with friction linings on a support tube by a cone on an actuating rod which is connected to a control piston in a control cylinder and biased by a spring into the clamping position, for blocking against the inner wall of the Piston rod to be pressed.
  • a further clamping device for locking a piston rod of a piston-cylinder assembly is in the document DE 38 10 183 A1 described.
  • the clamping device is in the piston arranged, wherein pressure-dependent radially movable inner disk segments unlock the piston. With applied pressure of the working fluid, the free movement of the piston is given. In case of pressure failure, the disk segments are moved by means of springs radially in the direction of the inner circumferential surface of the cylinder tube, act clamped and have a blocking of the movement of the piston rod to the sequence.
  • EP 1 170 512 B1 is a fluid-operated cylinder with mechanical path blocking in the unpressurized state, in which the blocking takes place by means of the interaction of the teeth of two spur gears as blocking elements.
  • One of the spur gears is stationary with the housing of the working cylinder and the other with a rotatingly arranged threaded spindle of large pitch or the spindle of a ball screw.
  • the arranged on the threaded spindle spur gear is mounted with this form-fitting, displaceable and axially resilient. In case of pressure failure shifts by the action of a spring this spur gear so that its teeth with that of the fixed spur gear is engaged, whereby it comes to blocking, blocking the movement of the piston rod.
  • Belonging to the second group are locking systems that act indirectly via a positive coupling of the piston rod with a threaded spindle drive with self-locking as a locking device.
  • the coupling of the piston rod with a threaded spindle is usually carried out by means of a threaded spindle suitable nut, which may be fixedly mounted, wherein the threaded spindle causes the axial movement of the piston rod, or the nut is designed as a running nut and the axial movement of the piston rod is effected by this.
  • a to be moved by means of the piston rod load is thus always coupled to the axial movement of the piston rod causing the gear member of the spindle drive.
  • the self-locking spindle is set in rotating motion via an intermediate gear unit and by means of a suitable drive unit, whereby the load is moved to the piston rod via a guided nut or axial.verschobene spindle. Due to the positive coupling of the movable part of the lifting device with self-locking spindle, the movement of the piston rod is blocked in case of failure of the pressure energy and then held a load in the current position.
  • FR 2 150 595 A is known based on this principle fuse for a fluid cylinder.
  • a partially hollow piston rod with a piston is coupled via a nut in this with a threaded spindle.
  • the threaded spindle is coupled to an auxiliary motor which drives the threaded spindle.
  • the auxiliary motor may be a hydraulic vane motor which may have separate ports for the pressure medium or its ports are connected to the ports of the cylinder.
  • a double-acting bypass line is provided, are arranged in the spring-loaded pressure relief valves.
  • the limitation of the torque acting on the threaded spindle of the auxiliary motor is thus not adjustable for the achievement of a synchronism of piston movement and speed of the threaded spindle.
  • the fuse is thus suitable only for a narrow range of a to be moved with the piston rod load. If the load on the piston rod is too low, the piston will rush forward, causing it to jam in the thread mating between the nut and threaded spindle as well as at too large loads, in which the threaded spindle nachschiebt.
  • roller screw drives which act kinematically similar to spindle drives and can be designed as a planetary roller drive or roller screw drive.
  • the difference between the two types consists only in the execution of the roles and their storage in a running nut.
  • the roles of planetary roller drives have a thread, the rollers as locking elements of roller screws are provided with grooves on the circumference.
  • the object of the invention is the volume flow for a pressure-medium-operated lifting device with self-locking threaded spindle, which cooperates with a threaded partner on a hollow piston rod of a working cylinder, as a linear Druckstrom redesigner, and with a drive shaft of a coupled rotating pressure electricity consumer, so vote between two pressure stream consumers that a synchrony of the speed of the axial movement of the piston rod with the speed of the threaded spindle is ensured.
  • a pressure-medium-operated lifting device with self-locking threaded spindle essentially consists of a linear pressure flow consumer in the form of a working cylinder whose partially hollow piston rod cooperates positively with a threaded spindle drive with self-locking as a locking device and is coupled with a rotating Druckstrom redesigner with an output shaft.
  • the piston rod of the linear pressure power consumer is coupled via the self-locking threaded spindle, which is positively and non-positively connected to the output shaft of the rotating pressure power consumer, with the rotating pressure flow consumer.
  • the movement of the load on the piston rod takes place exclusively by means of the linear pressure flow consumer by controlling the flow of fluid to the respective pressure consumer is controlled so that the rotating Druckstromromeer only the self-locking screw speed controlled, according to the speed of the axial movement of the piston rod with the least friction.
  • the speed of the self-locking threaded spindle is thus adapted to the speed of the axial movement of the piston rod and depends on the pitch of the thread of the self-locking threaded spindle.
  • the amount of fluid to be supplied to the rotating pressure flow consumer is thereby determined, thus ensuring the balance between the axial movement of the piston rod and the tracking of the self-locking threaded spindle is and the load on the piston rod only or almost only, by means of the linear Druckstromsomeers on the piston rod is moved.
  • the advantages of the invention are in particular that the overall efficiency of the fluid-operated lifting device is substantially greater than that of a rotating Druckstromsomeers of about 35 percent, if the load would be moved to the piston rod alone on the self-locking screw. It may be achieved an overall efficiency in the vicinity of the lying for a linear pressure flow consumer size, which is usually at least 90 percent.
  • FIG.1 An example executed pressure-medium-operated lifting device is after Fig.1 essentially of a linear pressure current consumer 1 and a rotating pressure current consumer 2, which are designed as a structural unit and coupled directly to one another.
  • the linear Druckstromceter 1 has a conventional, partially hollow piston rod 3, in which a self-locking threaded spindle 4 is arranged, which cooperates with a threaded partner 5 in a working piston 6.
  • the threaded spindle 4 is connected by means of a non-positive and positive connection 7 with an output shaft 8 of the rotating Druckstromsomemers 2.
  • the supply and discharge of a pressure medium for operating the pressure-medium-operated lifting device takes place in a known manner via a first connection 9 and a second connection 10, which in Fig.2 is shown.
  • the speed of the extending piston rod 3 and the rotational speed at the output shaft 8 of the rotating Druckstromsomeers 2 synchronized by the piston chamber 14 to be supplied amount of the pressure medium is adjusted by means of a first flow control valve 15 in the flow.
  • the existing in a piston rod chamber 16 pressure medium is passed upon extension of the piston rod 3 via a bore 17 and a gap 18 of a double-walled cylinder tube 19 in a circulation channel 20 and after Fig.2 further via a drain hole 21 and a check valve 22 in a drain passage 23, in which also via the bores 24 from the rotating Druckstromsomeer 2 effluent pressure medium to the drain-oriented second port 9 is performed.
  • the efficiency of the pressure-medium-operated lifting device with self-locking threaded spindle 4 is optimal when the load is carried on the piston rod 3 exclusively from the linear Druckstromsomeer 1 and the threaded spindle 4 is followed by the rotating Druckstromceter 2 only the extension movement of the piston rod 3.
  • the supply of the pressure medium via the second port 10 and the outflow of the pressure medium via the first port 9 takes place.
  • the pressure medium is here after Fig.2 Via a further channel 25, the circulation channel 20, the intermediate space 18 and the bore 17, the pressure medium passes into the piston rod chamber 16.
  • a second flow control valve 26 is via the drain passage 23 to the linear Druckstromsomeer 1 and fed via the bores 24 the rotating Druckstrom redesigner the amount of pressure medium to be supplied to the piston rod chamber 16 adapted to again synchronize the rotational speed of the output shaft 8 of the rotating Druckstromsomeers 2 with the speed of the retracting piston rod 3 of the linear Druckstromceters 1.
  • the power control valves 15; 26 are also when draining the pressure medium from the rooms 14; 16 effective.
  • the threaded spindle 4 is mounted, for example via tapered roller bearings 27 of the output shaft 8 of the rotating Druckstromsomeers 2, wherein the tapered roller bearings 27 are mounted in a left outer housing 28.
  • the left outer housing 28 is positively and positively connected via a center housing 29 and the cam 13 with a right outer housing 30.
  • the present in the left outer housing 28, the middle housing 29 and the right outer housing 30 existing inlet and outlet channels in the form of the drain hole 21 and the further channel 25 are coupled to each other via connecting pipes 31.

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

Claims (3)

  1. Dispositif de levage entraîné par un fluide sous pression comportant une broche filetée autobloquante (4), coopérant avec un élément fileté complémentaire (5) d'une tige de piston partiellement creuse (3) d'un vérin, comme consommateur linéaire (1) de fluide sous pression, ce consommateur linéaire de fluide sous pression (1) étant couplé à un consommateur rotatif de fluide sous pression (2) ayant un arbre entraîné (8), cet arbre entraîné (8) étant relié à la broche filetée (4) du consommateur linéaire (1) de fluide sous pression par une liaison par la forme et la force, une synchronisation entre la vitesse du mouvement axial de la tige de piston (3) du consommateur linéaire de fluide sous pression (1) et la vitesse de rotation de la broche filetée (4) entrainée par le consommateur rotatif de fluide sous pression (2) étant obtenue,
    caractérisé en ce que
    le courant de fluide sous pression alimentant le dispositif de levage entrainé par un fluide sous pression est subdivisé en des courants partiels vers le consommateur linéaire de fluide sous pression (1) et le consommateur rotatif de fluide sous pression (2), le débit du courant partiel devant être transféré vers une chambre de piston ou une chambre de tige de piston (14, 16) du consommateur linéaire de fluide sous pression (1) étant étranglé par une première vanne de réglage de débit (15) ou d'une seconde vanne de réglage de débit (26) dans des conduites d'alimentation (11, 25) vers le consommateur linéaire de fluide sous pression (1).
  2. Dispositif de levage entraîné par un fluide sous pression et ayant une broche filetée autobloquante selon la revendication 1,
    caractérisé en ce que
    le fluide sous pression sollicite simultanément le consommateur linéaire de fluide sous pression (1) et le consommateur rotatif de fluide sous pression (2).
  3. Dispositif de levage entraîné par un fluide sous pression et ayant une broche filetée autobloquante selon les revendications 1 et 2,
    caractérisé en ce que
    la synchronisation de la vitesse du mouvement axial de la tige de piston (3) et de la vitesse de rotation de la broche filetée autobloquante (4) est telle que le mouvement d'une charge appliquée à la tige de piston (3) ne se traduit que par la fourniture de fluide sous pression à la chambre de travail respective du consommateur linéaire de fluide sous pression (1) et la broche filetée (4) est asservie en fonction de la vitesse du mouvement axial de la tige de piston (3) dans l'élément de filetage complémentaire (5) du piston de travail (6) par l'arbre de sortie (8) du consommateur rotatif de fluide sous pression (2), avec le frottement le plus faible.
EP20070021865 2006-12-23 2007-11-10 Dispositif de levage actionné par pression fluidique avec un axe fileté autobloquant Expired - Fee Related EP1936208B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200620019452 DE202006019452U1 (de) 2006-12-23 2006-12-23 Druckmittelbetriebene Hubvorrichtung mit selbsthemmender Gewindespindel

Publications (3)

Publication Number Publication Date
EP1936208A2 EP1936208A2 (fr) 2008-06-25
EP1936208A3 EP1936208A3 (fr) 2009-04-08
EP1936208B1 true EP1936208B1 (fr) 2012-07-11

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ID=37913326

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Application Number Title Priority Date Filing Date
EP20070021865 Expired - Fee Related EP1936208B1 (fr) 2006-12-23 2007-11-10 Dispositif de levage actionné par pression fluidique avec un axe fileté autobloquant

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EP (1) EP1936208B1 (fr)
DE (1) DE202006019452U1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008011467U1 (de) 2008-08-28 2008-11-06 Bümach Engineering International B.V. Hubvorrichtung mit selbsthemmender Gewindespindel
GB2516427A (en) * 2013-07-18 2015-01-28 Lb Bentley Ltd Actuator
DE102015108829A1 (de) * 2015-06-03 2016-12-08 Neumeister Hydraulik Gmbh Doppeltwirkender Verriegelungszylinder und Verfahren zum Betreiben eines doppeltwirkenden Verriegelungszylinders

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2150595A1 (fr) 1971-08-27 1973-04-13 Langet Maurice
DE3629677A1 (de) 1986-09-01 1988-03-10 Kontec Gmbh Vorrichung zur verriegelung des kolbens einer kolben-zylinderanordnung
DE19633412A1 (de) * 1996-08-19 1998-03-05 Wolfram Sielemann Druckmittelbetriebener Antrieb

Also Published As

Publication number Publication date
EP1936208A2 (fr) 2008-06-25
DE202006019452U1 (de) 2007-03-29
EP1936208A3 (fr) 2009-04-08

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