WO2009049768A1 - Hydraulic spring-loaded drive - Google Patents

Hydraulic spring-loaded drive Download PDF

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Publication number
WO2009049768A1
WO2009049768A1 PCT/EP2008/008285 EP2008008285W WO2009049768A1 WO 2009049768 A1 WO2009049768 A1 WO 2009049768A1 EP 2008008285 W EP2008008285 W EP 2008008285W WO 2009049768 A1 WO2009049768 A1 WO 2009049768A1
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WO
WIPO (PCT)
Prior art keywords
spring
pressure body
pressure
guide ring
working cylinder
Prior art date
Application number
PCT/EP2008/008285
Other languages
German (de)
French (fr)
Inventor
Henrik Lohrberg
Joachim Eggers
Claus Sticker
Original Assignee
Abb Technology 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 Abb Technology Ag filed Critical Abb Technology Ag
Priority to CN200880111985.8A priority Critical patent/CN101933109B/en
Priority to EP08802713.1A priority patent/EP2198442B1/en
Priority to JP2010529262A priority patent/JP5512526B2/en
Priority to KR1020107008104A priority patent/KR101537021B1/en
Publication of WO2009049768A1 publication Critical patent/WO2009049768A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/34—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator hydraulic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H01H3/301—Charging means using a fluid actuator

Definitions

  • the invention relates to a hydraulic spring accumulator drive according to the preamble of claim 1.
  • a storage spring pressurizes a fluid via a pressure body and at least two pressure pistons. By means of this fluid, a drive rod is moved, which is attached to a slidable in a working cylinder drive piston.
  • the pressure body is preferably annular and arranged concentrically around the working cylinder housing around.
  • the hydraulic system When installing the spring-loaded actuator and during maintenance, the hydraulic system is depressurized.
  • the memory spring is merely biased in this state and expands axially maximum.
  • the storage spring presses the pressure body against a stop on the working cylinder housing, whereby the pressure body between the stop and the storage spring is clamped.
  • the hydraulic system is under pressure.
  • the storage spring is further tensioned in this state, which is referred to as charged in the following, and their axial extent is reduced.
  • the Memory spring presses the pressure body against the pressure piston, which thereby put the fluid under pressure.
  • the pressure body is clamped between the pressure piston and the storage spring.
  • the stop on the working cylinder housing exerts a force on the pressure body in a radially inward direction in the direction of the accumulator spring.
  • the fluid exerts forces in the direction of the accumulator spring via the pressure pistons on the pressure body in a radially outer region.
  • the storage spring exerts a respective equal, oppositely directed counterforce on the pressure body.
  • the counterforce engages radially on the pressure body, the counterforce is offset radially in the case of a hydraulic system under pressure to the forces exerted by the pressure piston. If this counterforce engages radially on the outside of the pressure body, the counterforce is offset radially in the case of a pressureless hydraulic system to the force exerted by the stop.
  • Such a radial force offset can lead to bent at relatively high forces of the pressure body.
  • the object of the invention is to further develop a hydraulic spring-loaded drive of the type mentioned above such that a radial force offset on the pressure body is avoided.
  • a guide ring is arranged radially between the pressure body and the working cylinder housing such that during clamping and while relaxing the storage spring of the guide ring is axially free of force, and that in prestressed storage spring, the pressure body is axially free of force.
  • the storage spring presses radially outward on the pressure body, and that at the same distance to the central axis of the working cylinder housing as the pressure piston.
  • the storage spring presses radially outward on the pressure body, and that at the same distance to the central axis of the working cylinder housing as the pressure piston.
  • the storage spring presses radially inward on the guide ring, and that at the same distance from the central axis of the cylinder housing as the stop.
  • a radial force offset on the pressure body and on the guide ring is avoided.
  • a guide tape is inserted in the guide ring.
  • the guide band improves the sliding properties of the guide ring on working cylinder housing.
  • Fig. 1 A hydraulic spring accumulator drive according to the invention.
  • FIG. 1 an inventive hydraulic spring accumulator drive is shown in a sectional view at pressure-less hydraulic system.
  • the storage spring 12 is designed as a plate spring package.
  • Other types of storage springs are conceivable, for example a spiral spring.
  • the memory spring 10 presses with its head end, which lies opposite the foot end, on a guide ring 14 and presses it against a stop 24.
  • the stop 24 is located in the vicinity of the head portion 26 of the working cylinder housing 12, which is the foot portion 20 axially opposite.
  • the area at which the accumulator spring 10 presses on the guide ring 14 is located in the radial direction at the level of the stopper 24. A radial force offset between the force exerted by the accumulator spring 10 and the counterforce exerted by the stop 24 in the opposite direction is thus avoided.
  • a container body 30 is arranged, which has an axially, that is parallel to the central axis of the working cylinder housing 12, extending bore 32, in which a pressure piston 34 is slidably disposed.
  • a piston rod 36 At which the storage spring 12 facing the end of the plunger 34 is a piston rod 36 which protrudes from the bore 32 of the container body 30.
  • the hydraulic spring storage drive has at least two, preferably three container body, each with a bore and located therein pressure piston with piston rod. These container bodies are arranged around the working cylinder housing 12, wherein the central axes of the said bores are equidistant from the central axis of the working cylinder housing 12. In this sectional view, only one container body is shown.
  • the pressure body 16 and the guide ring 14 are axially interlocked with each other so that the pressure body 16 in a movement on the foot portion 20 of the cylinder housing 12 to the guide ring 14 entrains, and that the guide ring 14 in a movement on the head portion 26 of the cylinder housing 12 to the Pressure body 16 entrains.
  • the pressure body 16 and the guide ring 14 are arranged side by side without play. A movement of the pressure body 16 in the radial direction with respect to the guide ring 14 is thus not possible.
  • a guide belt 18 is inserted into the guide ring 14.
  • the accumulator spring 10 is merely biased.
  • the pressure body 16 is axially free of force. The pressure body 16 is thus displaceable in the axial direction between the accumulator spring 10 and the piston rod 36.
  • the accumulator spring 10 For tensioning the accumulator spring 10 is pumped by a pump, not shown here, fluid through a channel 38 into the bore 32, in the memory spring 10 facing away from the area. The fluid forces the accumulator piston 34 and attached piston rod 36 out of the bore 32 toward the accumulator spring 10.
  • the piston rod 36 exerts an axial force on the pressure body 16, which further transmits this force to the accumulator spring 10, whereby the accumulator spring 10 is compressed and thus tensioned.
  • the pressure body 16 is clamped between the accumulator spring 10 and the piston rod 36 and moves in the direction of the foot region 20 of the cylinder housing 12.
  • the pressure body 16 takes along the guide ring 14, which thus also moves in the direction of the foot region 20 of the working cylinder housing 12.
  • the pump stops.
  • the accumulator spring 10 is charged, the accumulator piston 34, the piston rod 36, the pressure body 16 and the guide ring 14 rest.
  • the guide ring 14 is axially free of force. The guide ring 14 is thus displaceable in the axial direction between the accumulator spring 10 and the pressure body 16.
  • the accumulator spring 10 is gradually relaxed and expands axially.
  • the storage spring 10 presses the pressure body 16 and thus also the piston rod 36 and the accumulator piston 34 into the bore 32 in the direction of the head region 26 of the working cylinder housing 12.
  • the pressure body 16 is clamped between the accumulator spring 10 and the piston rod 36 and moves in the direction of the head portion 26 of the cylinder housing 12 to.
  • the accumulator spring 10 takes along the guide ring 14, which thus also moves in the direction of the head region 26 of the working cylinder housing 12.
  • the guide ring 14 is axially free of force during operation of the spring-loaded drive and is thus displaceable in the axial direction between the accumulator spring 10 and the pressure body 16.
  • the accumulator spring 10 presses with its head end on the pressure body 16 and presses it against the piston rod 36.
  • a support spring 28 is provided in the head region of the accumulator spring 10.
  • the support spring 28 is part of the storage spring 10 and is rigid, that is, the support spring 28 is not or only slightly deformed during clamping and during the relaxation of the accumulator spring 10.
  • the support spring 28 is arranged so that it touches the guide ring 14 and / or the pressure body 16 at all times.
  • the support spring 28 presses the guide ring 14 against the stop 24. During clamping and during the relaxation of the accumulator spring 10, the support spring 28 presses the pressure body 16 against the piston rod 36th
  • the storage spring 10 is guided in the prestressed state and during clamping and during relaxation by means of the guide ring 14 and the pressure body 16 at its head end in the axial direction. An evasion of the head end the accumulator spring 10 in a different direction, in particular in the radial direction, is thus prevented.

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  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Lubricants (AREA)
  • Actuator (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention relates to a hydraulic spring-loaded drive comprising a working cylinder arranged in a working cylinder housing (12), at least one pre-loaded spring (10), at least two pressure pistons (34) that are each arranged in a bore (32) in a sliding displaceable way, and a pressure body (16) arranged concentrically around the working cylinder housing (12), wherein the pre-loaded spring (10) puts fluid present in the bores (32) under pressure by way of the pressure body (16) and the pressure pistons (34). A guide ring (14) is arranged radially between the pressure body (16) and the working cylinder housing (12) such that during tensioning and during release of the pre-loaded spring (10) the guide ring (14) is axially without force and that the pressure body (16) is axially without force when the pre-loaded spring (10) is pre-tensioned.

Description

Hydraulischer Federspeicherantrieb Hydraulic spring accumulator drive
Beschreibungdescription
Die Erfindung betrifft einen hydraulischen Federspeicherantrieb gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a hydraulic spring accumulator drive according to the preamble of claim 1.
Ein solcher Federspeicherantrieb ist aus der Patentanmeldung EP 0829892 A1 , insbesondere Fig. 3, bekannt. Dabei setzt eine Speicherfeder über einen Druckkörper und mindestens zwei Druckkolben ein Fluid unter Druck. Mittels dieses Fluids wird eine Antriebsstange bewegt, welche an einem in einem Arbeitszylinder gleitend verschiebbaren Antriebskolben befestigt ist. Der Druckkörper ist dabei vorzugsweise ringförmig ausgebildet und konzentrisch um das Arbeitszylindergehäuse herum angeordnet.Such a spring drive is known from the patent application EP 0829892 A1, in particular Fig. 3, known. In this case, a storage spring pressurizes a fluid via a pressure body and at least two pressure pistons. By means of this fluid, a drive rod is moved, which is attached to a slidable in a working cylinder drive piston. The pressure body is preferably annular and arranged concentrically around the working cylinder housing around.
Bei der Montage des Federspeicherantriebs sowie während Wartungsarbeiten ist das Hydrauliksystem drucklos. Die Speicherfeder ist in diesem Zustand lediglich vorgespannt und dehnt sich axial maximal aus. Die Speicherfeder presst dabei den Druckkörper gegen einen Anschlag am Arbeitszylindergehäuse, wodurch der Druckkörper zwischen dem Anschlag und der Speicherfeder festgeklemmt ist.When installing the spring-loaded actuator and during maintenance, the hydraulic system is depressurized. The memory spring is merely biased in this state and expands axially maximum. The storage spring presses the pressure body against a stop on the working cylinder housing, whereby the pressure body between the stop and the storage spring is clamped.
Während des Betriebs des Federspeicherantriebs steht das Hydrauliksystem unter Druck. Die Speicherfeder ist in diesem Zustand weiter gespannt, was im folgenden als aufgeladen bezeichnet wird, und ihre axiale Ausdehnung ist verringert. Die Speicherfeder presst dabei den Druckkörper gegen die Druckkolben, welche dadurch das Fluid unter Druck setzen. Der Druckkörper ist zwischen den Druckkolben und der Speicherfeder festgeklemmt.During operation of the spring accumulator drive, the hydraulic system is under pressure. The storage spring is further tensioned in this state, which is referred to as charged in the following, and their axial extent is reduced. The Memory spring presses the pressure body against the pressure piston, which thereby put the fluid under pressure. The pressure body is clamped between the pressure piston and the storage spring.
Bei drucklosem Hydrauliksystem übt der Anschlag am Arbeitszylindergehäuse auf den Druckkörper in einem radial innen liegenden Bereich eine Kraft in Richtung auf die Speicherfeder hin aus. Bei unter Druck stehendem Hydrauliksystem übt das Fluid über die Druckkolben auf den Druckkörper in einem radial außen liegenden Bereich Kräfte in Richtung auf die Speicherfeder hin aus. In beiden Fällen übt die Speicherfeder eine jeweils gleich große, entgegengesetzt gerichtete Gegenkraft auf den Druckkörper aus.When the hydraulic system is depressurized, the stop on the working cylinder housing exerts a force on the pressure body in a radially inward direction in the direction of the accumulator spring. When the hydraulic system is under pressure, the fluid exerts forces in the direction of the accumulator spring via the pressure pistons on the pressure body in a radially outer region. In both cases, the storage spring exerts a respective equal, oppositely directed counterforce on the pressure body.
Greift diese Gegenkraft radial innen an dem Druckkörper an, so ist die Gegenkraft bei unter Druck stehendem Hydrauliksystem radial zu den von den Druckkolben ausgeübten Kräften versetzt. Greift diese Gegenkraft radial außen an dem Druckkörper an, so ist die Gegenkraft bei drucklosem Hydrauliksystem radial zu der von dem Anschlag ausgeübten Kraft versetzt.If this counterforce engages radially on the pressure body, the counterforce is offset radially in the case of a hydraulic system under pressure to the forces exerted by the pressure piston. If this counterforce engages radially on the outside of the pressure body, the counterforce is offset radially in the case of a pressureless hydraulic system to the force exerted by the stop.
Ein solcher radialer Kraftversatz kann dazu führen, dass bei verhältnismäßig hohen Kräften der Druckkörper verbogen wird.Such a radial force offset can lead to bent at relatively high forces of the pressure body.
Aufgabe der Erfindung ist es, einen hydraulischen Federspeicherantrieb der Eingangs genannten Art derart weiter zu bilden, dass ein radialer Kraftversatz an dem Druckkörper vermieden ist.The object of the invention is to further develop a hydraulic spring-loaded drive of the type mentioned above such that a radial force offset on the pressure body is avoided.
Erfindungsgemäß ist radial zwischen dem Druckkörper und dem Arbeitszylindergehäuse ein Führungsring derart angeordnet, dass beim Spannen sowie beim Entspannen der Speicherfeder der Führungsring axial kraftfrei ist, und dass bei vorgespannter Speicherfeder der Druckkörper axial kraftfrei ist.According to the invention, a guide ring is arranged radially between the pressure body and the working cylinder housing such that during clamping and while relaxing the storage spring of the guide ring is axially free of force, and that in prestressed storage spring, the pressure body is axially free of force.
Beim Spannen sowie beim Entspannen der Speicherfeder drückt die Speicherfeder radial außen auf den Druckkörper, und zwar im gleichen Abstand zu der Mittelachse des Arbeitszylindergehäuses wie die Druckkolben. Somit ist beim Spannen und beim Entspannen der Speicherfeder ein radialer Kraftversatz an dem Druckkörper und an dem Führungsring vermieden.When clamping and while relaxing the storage spring, the storage spring presses radially outward on the pressure body, and that at the same distance to the central axis of the working cylinder housing as the pressure piston. Thus, when clamping and at Relax the memory spring a radial force offset on the pressure body and avoided on the guide ring.
Bei vorgespannter Speicherfeder drückt die Speicherfeder radial innen auf den Führungsring, und zwar im gleichen Abstand zu der Mittelachse des Arbeitszylindergehäuses wie der Anschlag. Somit ist auch bei vorgespannter Speicherfeder ein radialer Kraftversatz an dem Druckkörper und an dem Führungsring vermieden.When preloaded memory spring, the storage spring presses radially inward on the guide ring, and that at the same distance from the central axis of the cylinder housing as the stop. Thus, even with preloaded memory spring, a radial force offset on the pressure body and on the guide ring is avoided.
Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist ein Führungsband in den Führungsring eingelegt.According to an advantageous embodiment of the invention, a guide tape is inserted in the guide ring.
Das Führungsband verbessert die Gleiteigenschaften des Führungsrings auf Arbeitszylindergehäuse.The guide band improves the sliding properties of the guide ring on working cylinder housing.
Anhand der Zeichnung, in der ein Ausführungsbeispiel der Erfindung dargestellt ist, werden die Erfindung, vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung, sowie Weitere Vorteile näher erläutert und beschrieben.Reference to the drawing, in which an embodiment of the invention is shown, the invention, advantageous refinements and improvements of the invention, and further advantages are explained and described in detail.
Es zeigt:It shows:
Fig. 1 : Einen erfindungsgemäßen hydraulischen Federspeicherantrieb.Fig. 1: A hydraulic spring accumulator drive according to the invention.
In Fig. 1 ist ein erfindungsgemäßer hydraulischer Federspeicherantrieb in einer Schnittansicht bei drucklosem Hydrauliksystem dargestellt.In Fig. 1, an inventive hydraulic spring accumulator drive is shown in a sectional view at pressure-less hydraulic system.
Um ein Arbeitszylindergehäuse 12 herum ist eine Speicherfeder 10 angeordnet, welche sich mit ihrem Fußende an einem Abstützring 22 abstützt, welcher sich in der Nähe des Fußbereichs 20 des Arbeitszylindergehäuses 12 befindet. In diesem Beispiel ist die Speicherfeder 12 als Tellerfederpaket ausgeführt. Auch andere Arten von Speicherfedern sind denkbar, beispielsweise eine Spiralfeder.Around a working cylinder housing 12 around a memory spring 10 is arranged, which is supported with its foot on a support ring 22 which is located in the vicinity of the foot portion 20 of the cylinder housing 12. In this example, the storage spring 12 is designed as a plate spring package. Other types of storage springs are conceivable, for example a spiral spring.
Die Speicherfeder 10 drückt mit ihrem Kopfende, welches dem Fußende gegenüber liegt, auf einen Führungsring 14 und presst diesen gegen einen Anschlag 24. Der Anschlag 24 befindet sich in der Nähe des Kopfbereichs 26 des Arbeitszylinder- gehäuses 12, welcher dem Fußbereich 20 axial gegenüber liegt. Der Bereich, an welchem die Speicherfeder 10 auf den Führungsring 14 drückt, liegt in radialer Richtung auf Höhe des Anschlags 24. Ein radialer Kraftversatz zwischen der von der Speicherfeder 10 ausgeübten Kraft und der von dem Anschlag 24 in entgegengesetzter Richtung ausgeübten Gegenkraft ist damit vermieden.The memory spring 10 presses with its head end, which lies opposite the foot end, on a guide ring 14 and presses it against a stop 24. The stop 24 is located in the vicinity of the head portion 26 of the working cylinder housing 12, which is the foot portion 20 axially opposite. The area at which the accumulator spring 10 presses on the guide ring 14 is located in the radial direction at the level of the stopper 24. A radial force offset between the force exerted by the accumulator spring 10 and the counterforce exerted by the stop 24 in the opposite direction is thus avoided.
Zwischen dem Anschlag 24 und dem Kopfbereich 26 ist ein Behälterkörper 30 angeordnet, welcher eine axial, das heißt parallel zu der Mittelachse des Arbeitszylindergehäuses 12, verlaufende Bohrung 32 aufweist, in welcher ein Druckkolben 34 gleitend verschiebbar angeordnet ist. An dem der Speicherfeder 12 zugewandten Ende des Druckkolbens 34 befindet sich eine Kolbenstange 36, welche aus der Bohrung 32 des Behälterkörpers 30 herausragt.Between the stop 24 and the head portion 26, a container body 30 is arranged, which has an axially, that is parallel to the central axis of the working cylinder housing 12, extending bore 32, in which a pressure piston 34 is slidably disposed. At which the storage spring 12 facing the end of the plunger 34 is a piston rod 36 which protrudes from the bore 32 of the container body 30.
Der hydraulische Federspeicherantrieb verfügt über mindestens zwei, vorzugsweise drei Behälterkörper mit je einer Bohrung und darin befindlichem Druckkolben mit Kolbenstange. Diese Behälterköper sind um das Arbeitszylindergehäuse 12 herum angeordnet, wobei die Mittelachsen der besagten Bohrungen den gleichen Abstand zu der Mittelachse des Arbeitszylindergehäuses 12 besitzen. In dieser Schnittansicht ist nur ein Behälterkörper dargestellt.The hydraulic spring storage drive has at least two, preferably three container body, each with a bore and located therein pressure piston with piston rod. These container bodies are arranged around the working cylinder housing 12, wherein the central axes of the said bores are equidistant from the central axis of the working cylinder housing 12. In this sectional view, only one container body is shown.
Konzentrisch um das Arbeitszylindergehäuse 12 und um den Führungsring 14 herum ist ein Druckkörper 16 vorgesehen. Der Druckkörper 16 und der Führungsring 14 sind axial derart miteinander verzahnt, dass der Druckkörper 16 bei einer Bewegung auf den Fußbereich 20 des Arbeitszylindergehäuses 12 zu den Führungsring 14 mitnimmt, und dass der Führungsring 14 bei einer Bewegung auf den Kopfbereich 26 des Arbeitszylindergehäuses 12 zu den Druckkörper 16 mitnimmt.Concentrically around the working cylinder housing 12 and around the guide ring 14 around a pressure body 16 is provided. The pressure body 16 and the guide ring 14 are axially interlocked with each other so that the pressure body 16 in a movement on the foot portion 20 of the cylinder housing 12 to the guide ring 14 entrains, and that the guide ring 14 in a movement on the head portion 26 of the cylinder housing 12 to the Pressure body 16 entrains.
Radial sind der Druckkörper 16 und der Führungsring 14 spielfrei nebeneinander angeordnet. Eine Bewegung des Druckkörpers 16 in radialer Richtung bezüglich des Führungsrings 14 ist somit nicht möglich.Radially, the pressure body 16 and the guide ring 14 are arranged side by side without play. A movement of the pressure body 16 in the radial direction with respect to the guide ring 14 is thus not possible.
Zur Verbesserung der Gleiteigenschaften des Führungsrings 14 auf dem Arbeitszylindergehäuse 12 ist in den Führungsring 14 ein Führungsband 18 eingelegt. In der gezeigten Darstellung, das heißt bei drucklosem Hydrauliksystem, ist die Speicherfeder 10 lediglich vorgespannt. Bei vorgespannter Speicherfeder 10 des Federspeicherantriebs, ist der Druckkörper 16 axial kraftfrei. Der Druckkörper 16 ist somit in axialer Richtung zwischen der Speicherfeder 10 und der Kolbenstange 36 verschiebbar.To improve the sliding properties of the guide ring 14 on the working cylinder housing 12, a guide belt 18 is inserted into the guide ring 14. In the illustration shown, that is, in a pressureless hydraulic system, the accumulator spring 10 is merely biased. When preloaded memory spring 10 of the spring drive, the pressure body 16 is axially free of force. The pressure body 16 is thus displaceable in the axial direction between the accumulator spring 10 and the piston rod 36.
Zum Spannen der Speicherfeder 10 wird von einer hier nicht dargestellten Pumpe Fluid durch einen Kanal 38 in die Bohrung 32 gepumpt, und zwar in den der Speicherfeder 10 abgewandten Bereich. Das Fluid drückt den Speicherkolben 34 und die daran befestigte Kolbenstange 36 aus der Bohrung 32 heraus in Richtung auf die Speicherfeder 10 zu.For tensioning the accumulator spring 10 is pumped by a pump, not shown here, fluid through a channel 38 into the bore 32, in the memory spring 10 facing away from the area. The fluid forces the accumulator piston 34 and attached piston rod 36 out of the bore 32 toward the accumulator spring 10.
Die Kolbenstange 36 übt dabei eine axiale Kraft auf den Druckkörper 16 aus, welcher diese Kraft weiter auf die Speicherfeder 10 überträgt, wodurch die Speicherfeder 10 zusammengedrückt und damit gespannt wird. Während des Spannens der Speicherfeder 10 ist der Druckkörper 16 zwischen der Speicherfeder 10 und der Kolbenstange 36 festgeklemmt und bewegt sich in Richtung auf den Fußbereich 20 des Arbeitszylindergehäuses 12 zu. Bei dieser Bewegung nimmt der Druckkörper 16 den Führungsring 14 mit, welcher sich somit auch in Richtung auf den Fußbereich 20 des Arbeitszylindergehäuses 12 zu bewegt.The piston rod 36 exerts an axial force on the pressure body 16, which further transmits this force to the accumulator spring 10, whereby the accumulator spring 10 is compressed and thus tensioned. During the tensioning of the accumulator spring 10, the pressure body 16 is clamped between the accumulator spring 10 and the piston rod 36 and moves in the direction of the foot region 20 of the cylinder housing 12. During this movement, the pressure body 16 takes along the guide ring 14, which thus also moves in the direction of the foot region 20 of the working cylinder housing 12.
Nachdem ein vorgegebener Arbeitsdruck in dem Hydrauliksystem erreicht ist stoppt die Pumpe. Die Speicherfeder 10 ist aufgeladen, der Speicherkolben 34, die Kolbenstange 36, der Druckkörper 16 und der Führungsring 14 ruhen. Der Führungsring 14 ist axial kraftfrei. Der Führungsring 14 ist somit in axialer Richtung zwischen der Speicherfeder 10 und dem Druckkörper 16 verschiebbar.After a predetermined working pressure has been reached in the hydraulic system, the pump stops. The accumulator spring 10 is charged, the accumulator piston 34, the piston rod 36, the pressure body 16 and the guide ring 14 rest. The guide ring 14 is axially free of force. The guide ring 14 is thus displaceable in the axial direction between the accumulator spring 10 and the pressure body 16.
Während des Betriebs des Federspeicherantriebs wird die Speicherfeder 10 schrittweise entspannt und dehnt sich dabei axial aus. Dabei drückt die Speicherfeder 10 den Druckkörper 16 und damit auch die Kolbenstange 36 und den Speicherkolben 34 in die Bohrung 32 hinein in Richtung auf den Kopfbereich 26 des Arbeitszylindergehäuses 12 zu. Während des Entspannens der Speicherfeder 10 ist der Druckkörper 16 zwischen der Speicherfeder 10 und der Kolbenstange 36 festgeklemmt und bewegt sich in Richtung auf den Kopfbereich 26 des Arbeitszylindergehäuses 12 zu. Bei dieser Bewegung nimmt die Speicherfeder 10 den Führungsring 14 mit, welcher sich somit auch in Richtung auf den Kopfbereich 26 des Arbeitszylindergehäuses 12 zu bewegt.During operation of the spring-loaded drive, the accumulator spring 10 is gradually relaxed and expands axially. The storage spring 10 presses the pressure body 16 and thus also the piston rod 36 and the accumulator piston 34 into the bore 32 in the direction of the head region 26 of the working cylinder housing 12. During the relaxation of the accumulator spring 10, the pressure body 16 is clamped between the accumulator spring 10 and the piston rod 36 and moves in the direction of the head portion 26 of the cylinder housing 12 to. During this movement, the accumulator spring 10 takes along the guide ring 14, which thus also moves in the direction of the head region 26 of the working cylinder housing 12.
Der Führungsring 14 ist auch während des Betriebs des Federspeicherantriebs axial kraftfrei und ist somit in axialer Richtung zwischen der Speicherfeder 10 und dem Druckkörper 16 verschiebbar.The guide ring 14 is axially free of force during operation of the spring-loaded drive and is thus displaceable in the axial direction between the accumulator spring 10 and the pressure body 16.
Während des Spannens sowie während des Entspannens der Speicherfeder 10 drückt die Speicherfeder 10 mit ihrem Kopfende auf den Druckkörper 16 und presst diesen gegen die Kolbenstange 36. Der Bereich, an welchem die Speicherfeder 10 auf den Druckkörper 16 drückt, liegt in radialer Richtung auf Höhe der Kolbenstange 36. Ein radialer Kraftversatz zwischen der von der Speicherfeder 10 ausgeübten Kraft und der von der Kolbenstange 36 in entgegengesetzter Richtung ausgeübten Gegenkraft ist damit vermieden.During the tensioning as well as during the relaxing of the accumulator spring 10, the accumulator spring 10 presses with its head end on the pressure body 16 and presses it against the piston rod 36. The area at which the accumulator spring 10 presses on the pressure body 16, lies in the radial direction at the level of Piston rod 36. A radial force offset between the force exerted by the accumulator spring 10 and the force exerted by the piston rod 36 in the opposite direction counterforce is thus avoided.
Im Kopfbereich des Speicherfeder 10 ist eine Stützfeder 28 vorgesehen. Die Stützfeder 28 ist Teil der Speicherfeder 10 und ist starr ausgeführt, das heißt, die Stützfeder 28 wird während des Spannens sowie während des Entspannens der Speicherfeder 10 nicht oder nur unwesentlich verformt. Die Stützfeder 28 ist so angeordnet, dass sie jederzeit den Führungsring 14 und/oder den Druckkörper 16 berührt.In the head region of the accumulator spring 10, a support spring 28 is provided. The support spring 28 is part of the storage spring 10 and is rigid, that is, the support spring 28 is not or only slightly deformed during clamping and during the relaxation of the accumulator spring 10. The support spring 28 is arranged so that it touches the guide ring 14 and / or the pressure body 16 at all times.
Im vorgespannten Zustand der Speicherfeder 10 drückt die Stützfeder 28 den Führungsring 14 gegen den Anschlag 24. Während des Spannens sowie während des Entspannens der Speicherfeder 10 drückt die Stützfeder 28 den Druckkörper 16 gegen die Kolbenstange 36.In the prestressed state of the accumulator spring 10, the support spring 28 presses the guide ring 14 against the stop 24. During clamping and during the relaxation of the accumulator spring 10, the support spring 28 presses the pressure body 16 against the piston rod 36th
Die Speicherfeder 10 ist im vorgespannten Zustand sowie während des Spannens und während des Entspannens mittels des Führungsrings 14 und des Druckkörpers 16 an ihrem Kopfende in axialer Richtung geführt. Ein Ausweichen des Kopfendes der Speicherfeder 10 in eine andere Richtung, insbesondere in radiale Richtung, ist somit verhindert. The storage spring 10 is guided in the prestressed state and during clamping and during relaxation by means of the guide ring 14 and the pressure body 16 at its head end in the axial direction. An evasion of the head end the accumulator spring 10 in a different direction, in particular in the radial direction, is thus prevented.
BezuqszeichenlisteLIST OF REFERENCES
Speicherfederstorage spring
ArbeitszylindergehäuseWorking cylinder housing
Führungsringguide ring
Druckkörperpressure vessels
Führungsbandguide band
Fußbereich desFoot area of the
ArbeitszylindergehäusesCylinder housing
Abstützringsupport ring
Anschlagattack
Kopfbereich desHead area of the
ArbeitszylindergehäusesCylinder housing
Stützfedersupport spring
Behälterkörpercontainer body
Bohrungdrilling
Druckkolbenpressure piston
Kolbenstangepiston rod
Kanal channel

Claims

Patentansprüche claims
1. Hydraulischer Federspeicherantrieb, umfassend einen Arbeitszylinder, welcher in einem Arbeitszylindergehäuse (12) angeordnet ist, mindestens eine Speicherfeder (10), mindestens zwei Druckkolben (34), welche in je einer Bohrung (32) gleitend verschiebbar angeordnet sind, und einen Druckkörper (16), welcher konzentrisch um das Arbeitszylindergehäuse (12) herum angeordnet ist, wobei die Speicherfeder (10) über den Druckkörper (16) und die Druckkolben (34) in den Bohrungen (32) befindliches Fluid unter Druck setzt, dadurch gekennzeichnet, dass radial zwischen dem Druckkörper (16) und dem Arbeitszylindergehäuse (12) ein Führungsring (14) derart angeordnet ist, dass beim Spannen sowie beim Entspannen der Speicherfeder (10) der Führungsring (14) axial kraftfrei ist, und dass bei vorgespannter Speicherfeder (10) der Druckkörper (16) axial kraftfrei ist.1. Hydraulic spring accumulator drive, comprising a working cylinder, which is arranged in a working cylinder housing (12), at least one accumulator spring (10), at least two pressure pistons (34), which are arranged in a respective bore (32) slidably displaceable, and a pressure body ( 16) which is arranged concentrically around the working cylinder housing (12) around, wherein the storage spring (10) via the pressure body (16) and the pressure piston (34) in the bores (32) fluid under pressure sets, characterized in that radially between the pressure body (16) and the working cylinder housing (12) a guide ring (14) is arranged such that when clamping and while relaxing the storage spring (10) of the guide ring (14) is axially free of force, and that in preloaded memory spring (10) Pressure body (16) is axially free of force.
2. Hydraulischer Federspeicherantrieb nach Anspruch 1 , dadurch gekennzeichnet, dass im Kopfbereich des Speicherfeder (10) eine Stützfeder (28) derart angeordnet ist, dass sie jederzeit den Führungsring (14) und/oder den Druckkörper (16) berührt.2. Hydraulic spring drive according to claim 1, characterized in that in the head region of the storage spring (10) has a support spring (28) is arranged such that it touches at any time the guide ring (14) and / or the pressure body (16).
3. Hydraulischer Federspeicherantrieb nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass in den Führungsring (14) ein Führungsband (18) eingelegt ist. 3. Hydraulic spring accumulator drive according to one of the preceding claims, characterized in that in the guide ring (14) a guide strip (18) is inserted.
PCT/EP2008/008285 2007-10-16 2008-09-30 Hydraulic spring-loaded drive WO2009049768A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN200880111985.8A CN101933109B (en) 2007-10-16 2008-09-30 Hydraulic spring-loaded drive
EP08802713.1A EP2198442B1 (en) 2007-10-16 2008-09-30 Hydraulic spring-loaded drive
JP2010529262A JP5512526B2 (en) 2007-10-16 2008-09-30 Hydraulic spring loaded drive
KR1020107008104A KR101537021B1 (en) 2007-10-16 2008-09-30 Hydraulic spring-loaded drive

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DE102007049758 2007-10-16
DE102007049758.1 2007-10-16
DE102007062291.2 2007-12-21
DE102007062291A DE102007062291A1 (en) 2007-10-16 2007-12-21 Hydraulic spring accumulator drive

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JP (1) JP5512526B2 (en)
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HU (1) HUE024572T2 (en)
WO (1) WO2009049768A1 (en)

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CN101933109A (en) 2010-12-29
HUE024572T2 (en) 2016-02-29
JP2011501057A (en) 2011-01-06
KR20100077164A (en) 2010-07-07
EP2198442B1 (en) 2014-12-17
DE102007062291A1 (en) 2009-04-23
JP5512526B2 (en) 2014-06-04
CN101933109B (en) 2013-08-28
EP2198442A1 (en) 2010-06-23
KR101537021B1 (en) 2015-07-15

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