EP3387267A1 - Electrohydraulic linear actuator - Google Patents

Electrohydraulic linear actuator

Info

Publication number
EP3387267A1
EP3387267A1 EP17723691.6A EP17723691A EP3387267A1 EP 3387267 A1 EP3387267 A1 EP 3387267A1 EP 17723691 A EP17723691 A EP 17723691A EP 3387267 A1 EP3387267 A1 EP 3387267A1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
linear actuator
housing
actuator according
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17723691.6A
Other languages
German (de)
French (fr)
Other versions
EP3387267B1 (en
Inventor
Matthias Grupp
Peter Roider
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.)
HAWE Altenstadt Holding GmbH
Original Assignee
Hoerbiger Automatisierungstechnik Holding 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 Hoerbiger Automatisierungstechnik Holding GmbH filed Critical Hoerbiger Automatisierungstechnik Holding GmbH
Publication of EP3387267A1 publication Critical patent/EP3387267A1/en
Application granted granted Critical
Publication of EP3387267B1 publication Critical patent/EP3387267B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F15B15/18—Combined units comprising both motor and pump
    • 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
    • F15B11/10—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor in which the servomotor position is a function of the pressure also pressure regulators as operating means for such systems, the device itself may be a position indicating system
    • 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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1428—Cylinders
    • 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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1485—Special measures for cooling or heating
    • 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
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20561—Type of pump reversible
    • 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
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3058—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F15B2211/7054—Having equal piston areas

Definitions

  • the present invention relates to an electro-hydraulic linear actuator.
  • Actuators are used to actuate mechanical consumers or other driven elements. Depending on the
  • Geometry of the movement of its output is to distinguish between - a rotating movement exporting or
  • Linear movement exporting or practicing - linear actuators on the other are electrohydraulic linear actuators with a purely electrical input interface and a mechanical output interface, all of which
  • Functional elements are part of a uniform, closed, pre-assembled module.
  • Electro-hydraulic linear actuators are known and used in various designs.
  • the state of the art includes, in particular, electrohydraulic linear actuators, as disclosed in WO 2015/187688 A1, US Pat. No. 6,543,223 B2, US Pat. No. 4,630,441 A, US Pat. No. 2,680,952 A, DE 102004036943 A1, US Pat. No. 5,144,801 A and US Pat. No. 5,519,995 ,
  • Usage may be more or less pronounced
  • various requirements include such as compact dimensions, high efficiency, high adjustment dynamics, low weight, high power at the mechanical output, high reliability and / or lifetime, low
  • Electro-hydraulic linear actuator which satisfies many of the requirements of typical applications in the sense of a particularly practicable compromise to a high degree, by the following combinatorially interacting features:
  • the linear actuator comprises a housing in which a hydraulic cylinder, a beank whges this
  • Hydraulic unit and a hydraulic oil tank are housed;
  • the hydraulic unit and the hydraulic oil reservoir are arranged adjacent to the hydraulic cylinder;
  • the housing consists of a housing shell
  • profile tube which is closed by means of two frontally attached to the housing shell housing cover end;
  • the hydraulic cylinder is as double-acting
  • Synchronization cylinder executed with one in one
  • the cylinder is through a first cavity of the
  • the housing has at least one opening for a mechanical interface to the piston unit of the hydraulic cylinder forming coupling element
  • the electric motor of the hydraulic unit is as
  • electrohydraulic linear actuators which do not require any external hydraulics and their environment alone via an electrical input interface and a
  • Hydraulic oil container is provided, an effective dissipation of heat from the corresponding (loss) heat sources done, the corresponding heat can be discharged through the housing effectively to the environment.
  • the profile tube can in particular made of aluminum
  • the electrical interface is preferably provided in the region of one of the two housing covers, particularly preferably in the region of that cover, the the electric motor of the (housed in the second cavity of the profile tube) hydraulic unit is adjacent.
  • Hydraulic cylinder directly in the housing is not mandatory. Rather, what is advantageous under certain conditions, even a separate, inserted into a cavity executed in the housing component form the cylinder of the hydraulic cylinder.
  • the hydraulic oil container is formed by the second cavity of the housing, which in which the housing shell forming
  • Hydraulic unit can directly in the cavity, which
  • heat-transmitting used in the corresponding cavity of the housing, for. B. pressed or shrunk.
  • Housing shell forming profile tube is inserted.
  • the hydraulic oil container is heat transfer surface on the inner wall of him
  • Hydraulic unit in the cavity of the housing proves incidentally also in this embodiment, d. H. in the case of a hydraulic oil container in the form of a separate, received in a cavity of the housing component advantageous.
  • the hydraulic oil container has a volume of at least twice the value of the sum of the volumes of the two working spaces. This dimensioning is favorable from the standpoint of a reliable heat balance.
  • Hydraulic unit is reversible. It can be dispensed with any control valves in particular between the hydraulic unit and the hydraulic cylinder.
  • the linear actuator is particularly preferably connected to the piston of the hydraulic cylinder, a position sensor. Under certain conditions regarding the physical dimensions and the integration of the electro-hydraulic linear actuator in the functional periphery may prove to be beneficial when not a conventional, end of the housing exiting piston rod is provided as the coupling element (or two end / front side of the housing
  • a manually operable directional control valve is provided, which is suitable, alternatively to a loading of the
  • Hydraulic cylinder through the hydraulic unit to establish a direct hydraulic connection between the two working spaces of the hydraulic cylinder.
  • Short circuit of the two work spaces is in case of failure, for example in case of power failure or caused by other reasons failure of the control of the linear actuator, a manual adjustment of the
  • Piston unit from the outside (via the coupling element) possible.
  • the position of the mechanical consumer can be set manually
  • Electro-hydraulic linear actuator is provided to influence, as quickly as possible and without consuming Measures such as a mechanical separation of the connection between coupling element of the linear actuator and mechanical consumer.
  • Brushless electric motor as external rotor motor contributes in a special way to the possibility of a
  • Electro-hydraulic linear actuator with very high power density d. H. a particularly favorable ratio between mechanical power at the output and size to realize.
  • the space required for the electro-hydraulic linear actuator is not the critical size or the limiting factor, so that it does not depend on a small size is crucial, the other advantages set forth above
  • inventive electro-hydraulic linear actuator achieve in a modification, namely using a brushless
  • This comprises a housing 1, which consists of three parts
  • the housing shell 2 is joined together, namely from a housing shell 2 and two frontally attached to this housing covers 3, 4.
  • the housing shell 2 is formed by a section of a running as an aluminum extruded profile tube.
  • a plurality of cavities 5, 6 are carried out, which is in accordance with the production of the housing shell as extruded profile continuously from one to the other
  • Housing cover 3, 4 extend.
  • a first, a circular cylindrical cross-section having cavity 5 forms the - directly in the housing first
  • the hydraulic cylinder 8 is designed as a double-acting constant-velocity cylinder, so that the piston unit 9 two cross-sectional hydraulic equal
  • Housing covers 3, 4 provided openings 16 extend therethrough.
  • the piston rod sections 14, 15 each represent a coupling element 17 which, as a mechanical output of the linear actuator, forms a mechanical interface with the piston unit 9 of the hydraulic cylinder 8.
  • two bellows 18 are illustrated.
  • a reversible hydraulic unit 22 which acts on the hydraulic cylinder 8, a hydraulic pump 20 and a brushless electric motor 21 driving the same
  • the pump housing 23 is sealingly inserted into the relevant cavity 6, so that it continues delimiting a hydraulic oil reservoir 24 formed in the second cavity 6.
  • the likewise the hydraulic oil tank 24 limiting housing cover 4 has a filling in the hydraulic oil tank filling and
  • Venting device 25 on.
  • the two pressure outputs 26 of the hydraulic pump 20 are via lines 27, each with a port 28 of the relevant hydraulic
  • the directional control valve 19 is manually operable.
  • the electric motor 21 of the hydraulic unit 22 comprises an external rotor 29 coupled to the pump rotor and an internal stator 30.
  • the latter is mounted on a control block 31 comprising the electronic control, which in turn is mounted on the associated housing cover 3.
  • the electrical input interface 32 At the housing cover 3 in question is the electrical input interface 32.
  • Hydraulic cylinder 8 based, an arrangement of
  • Hydraulic unit 22 and the hydraulic oil container 24 laterally adjacent to the hydraulic cylinder eighth In its region surrounding the hydraulic oil container 24, the housing jacket 2 has cooling ribs 33 on its outer side. Not only the hydraulic oil contained in the hydraulic oil tank 24 is tempered by these, but also the heat loss generated in the hydraulic pump 20 is dissipated. With regard to a favorable heat balance is by means of a projecting into the hydraulic oil tank 24, to the
  • Hydraulic pump 20 connected pipe 34 - under
  • a device for detecting the position of the piston unit comprises a housing-fixed position sensor 35 and a fixed to the piston unit 9 encoder 36.
  • the position signal of the position sensor 35 is connected via the signal line 37 to the electronic control.

Landscapes

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

Abstract

An electrohydraulic linear actuator comprises a housing (1) consisting of a tubular profile, which forms a housing shell (2) and in which there is a plurality of cavities (5, 6), and which is closed at the ends by means of two housing covers (3, 4) which are fitted to the ends of the housing shell (2). A first cavity (5) of the tubular profile forms a cylinder (7) which forms the hydraulic cylinder (8) of a double-acting synchronous cylinder; and a second cavity (6) of the tubular profile which extends parallel to the first cavity (5) accommodates a hydraulic unit (22) in addition to the hydraulic cylinder (8), and a hydraulic oil reservoir (24) is formed in said second cavity. Two working chambers (11, 12) of the hydraulic cylinder (8) are separated from each other by a piston unit (9). The housing (1) has at least one through-hole (16) for a coupling element (17) which forms a mechanical interface with the piston unit (9) of the hydraulic cylinder (8). The electric motor (21) of the hydraulic unit (22) is configured as a brushless outrunner motor.

Description

Elektrohydraulischer Linearaktuator  Electrohydraulic linear actuator
Die vorliegende Erfindung betrifft einen elektrohydraulischen Linearaktuator . The present invention relates to an electro-hydraulic linear actuator.
Zur Betätigung mechanischer Verbraucher bzw. sonstiger angetriebener Elemente dienen Aktuatoren. Je nach der Actuators are used to actuate mechanical consumers or other driven elements. Depending on the
Geometrie der Bewegung ihres Abtriebs ist zu unterscheiden zwischen - eine rotierende Bewegung ausführenden bzw. Geometry of the movement of its output is to distinguish between - a rotating movement exporting or
ausübenden - Drehaktuatoren einerseits und - eine performing - rotary actuators on the one hand and - one
Linearbewegung ausführenden bzw. ausübenden - Linearaktuatoren andererseits. Eine spezielle Gruppe unter letzteren bilden elektrohydraulische Linearaktuatoren mit einer rein elektrischen Eingangs-Schnittstelle und einer mechanischen Ausgangs-Schnittstelle, wobei sämtliche Linear movement exporting or practicing - linear actuators on the other. A special group among the latter are electrohydraulic linear actuators with a purely electrical input interface and a mechanical output interface, all of which
funktional zwischen der Eingangs-Schnittstelle und der functionally between the input interface and the
Ausgangs-Schnittstelle angeordneten Komponenten und Output interface arranged components and
Funktionselemente Teil einer einheitlichen, geschlossenen, vormontierten Baugruppe sind. Functional elements are part of a uniform, closed, pre-assembled module.
Elektrohydraulische Linearaktuatoren sind in verschiedenen Bauweisen bekannt und im Einsatz. Zum Stand der Technik zählen insbesondere elektrohydraulische Linearaktuatoren, wie sie in der WO 2015/187688 AI, der US 6543223 B2, der US 4630441 A, der US 2680952 A, der DE 102004036943 AI, der US 5144801 A und der US 5519995 A offenbart sind. Electro-hydraulic linear actuators are known and used in various designs. The state of the art includes, in particular, electrohydraulic linear actuators, as disclosed in WO 2015/187688 A1, US Pat. No. 6,543,223 B2, US Pat. No. 4,630,441 A, US Pat. No. 2,680,952 A, DE 102004036943 A1, US Pat. No. 5,144,801 A and US Pat. No. 5,519,995 ,
Im Lichte des bestehenden Standes der Technik ist die In the light of the existing state of the art is the
vorliegende Erfindung darauf gerichtet, einen present invention directed thereto
elektrohydraulischen Linearaktuator bereitzustellen, der sich durch eine besonders hohe Praxistauglichkeit auszeichnet. Je nach den spezifischen Randbedingungen der jeweiligen To provide electro-hydraulic linear actuator, which is characterized by a particularly high practicality. Depending on the specific boundary conditions of the respective
Verwendung können dazu mehr oder weniger ausgeprägt Usage may be more or less pronounced
verschiedene Anforderungen zählen wie beispielsweise kompaktes Baumaß, hoher Wirkungsgrad, hohe Verstelldynamik, geringes Gewicht, hohe Kraft am mechanischen Ausgang, hohe Zuverlässigkeit und/oder Lebensdauer, geringe various requirements include such as compact dimensions, high efficiency, high adjustment dynamics, low weight, high power at the mechanical output, high reliability and / or lifetime, low
Geräuschentwicklung, gute Handhabbarkeit, geringe Noise, good handling, low
Herstellungskosten, hohe Wartungsfreundlichkeit, etc. Production costs, high ease of maintenance, etc.
Gemäß der vorliegenden Erfindung zeichnet sich ein In accordance with the present invention will be apparent
elektrohydraulischer Linearaktuator, der vielen der bei typischen Anwendungen bestehenden Anforderungen im Sinne eines besonders praxistauglichen Kompromisses in hohem Maße genügt, durch die folgenden kombinatorisch zusammenwirkenden Merkmale aus : Electro-hydraulic linear actuator, which satisfies many of the requirements of typical applications in the sense of a particularly practicable compromise to a high degree, by the following combinatorially interacting features:
- der Linearaktuator umfasst ein Gehäuse, in welchem ein Hydraulikzylinder, ein diesen beaufschlagendes  - The linear actuator comprises a housing in which a hydraulic cylinder, a beaufschlagendes this
Hydraulikaggregat sowie ein Hydrauliköl-Behälter untergebracht sind;  Hydraulic unit and a hydraulic oil tank are housed;
- bezogen auf die Achse des Hydraulikzylinders sind das Hydraulikaggregat und der Hydrauliköl-Behälter neben dem Hydraulikzylinder angeordnet;  - Based on the axis of the hydraulic cylinder, the hydraulic unit and the hydraulic oil reservoir are arranged adjacent to the hydraulic cylinder;
- das Gehäuse besteht aus einem einen Gehäusemantel  - The housing consists of a housing shell
bildenden Profilrohr, welches mittels zweier stirnseitig an den Gehäusemantel angesetzter Gehäusedeckel endseitig verschlossen ist;  forming profile tube, which is closed by means of two frontally attached to the housing shell housing cover end;
- der Hydraulikzylinder ist als doppeltwirkender  - The hydraulic cylinder is as double-acting
Gleichlaufzylinder ausgeführt mit einer in einem  Synchronization cylinder executed with one in one
Zylinder geführten, zwei querschnittsgleiche  Cylinder guided, two cross section same
Arbeitsräume voneinander abgrenzenden Kolbeneinheit; Working spaces delimiting piston unit;
- der Zylinder ist durch einen ersten Hohlraum des - The cylinder is through a first cavity of the
Profilrohres ausgebildet;  Profile tube formed;
- das Gehäuse weist mindestens einen Durchbruch für ein eine mechanische Schnittstelle zur Kolbeneinheit des Hydraulikzylinders bildendes Koppelelement auf;  - The housing has at least one opening for a mechanical interface to the piston unit of the hydraulic cylinder forming coupling element;
- in einem sich parallel zum ersten Hohlraum erstreckenden zweiten Hohlraum des Profilrohrs ist das Hydraulikaggregat untergebracht und der Hydrauliköl- Behälter ausgeführt; - In a parallel to the first cavity extending second cavity of the profile tube is the Housed hydraulic unit and running the Hydrauliköl- container;
- der Elektromotor des Hydraulikaggregats ist als  - The electric motor of the hydraulic unit is as
bürstenloser Außenläufermotor ausgeführt.  brushless external rotor motor executed.
Trotz ausgesprochen kompakter Baumaße können erfindungsgemäße elektrohydraulische Linearaktuatoren, welche keinerlei externe Hydraulik benötigen und mit ihrer Umgebung allein über eine elektrische Eingangs-Schnittstelle und eine Despite extremely compact dimensions electrohydraulic linear actuators according to the invention, which do not require any external hydraulics and their environment alone via an electrical input interface and a
mechanische Ausgangs-Schnittstelle in funktionsrelevanter Verbindung stehen, bei einer hohen Verstelldynamik eine sehr hohe Verstellkraft bereitstellen. Zugleich kann durch das Hydrauliköl, für das ein in dem Gehäuse, nämlich in dem zweiten Hohlraum des Gehäusemantels, angeordneter mechanical output interface are in functionally relevant connection, provide a very high adjusting force at a high Verstelldynamik. At the same time can be arranged by the hydraulic oil, for one in the housing, namely in the second cavity of the housing shell
Hydrauliköl-Behälter vorgesehen ist, eine effektive Abfuhr von Wärme von den entsprechenden (Verlust- ) Wärmequellen erfolgen, wobei die entsprechende Wärme über das Gehäuse effektiv an die Umgebung abgegeben werden kann. Hydraulic oil container is provided, an effective dissipation of heat from the corresponding (loss) heat sources done, the corresponding heat can be discharged through the housing effectively to the environment.
Das Profilrohr kann dabei insbesondere aus Aluminium The profile tube can in particular made of aluminum
bestehen, namentlich aus den Abschnitt eines Aluminium- Strangpressprofils. Dies ist nicht nur insoweit vorteilhaft, als es die Herstellung eines formstabilen Gehäuses mit vergleichsweise geringem Aufwand ermöglicht; auch ist in diesem Falle die für den Wärmehaushalt entscheidende gute Wärmeübertragung gewährleistet. consisting, in particular, of the section of an extruded aluminum section. This is not only advantageous insofar as it allows the production of a dimensionally stable housing with comparatively little effort; Also in this case, the decisive for the heat balance good heat transfer is guaranteed.
Bei Ausführung des Gehäuses gemäß der vorliegenden Erfindung bietet sich auf vergleichsweise einfache Weise die In execution of the housing according to the present invention provides in a comparatively simple way the
Möglichkeit, dass der Zylinder des Hydraulikzylinders direkt in dem Gehäuse ausgeführt ist, wobei der Zylinder bevorzugt endseitig durch an den beiden Gehäusedeckeln angeformte Possibility that the cylinder of the hydraulic cylinder is designed directly in the housing, wherein the cylinder preferably integrally formed on the two housing covers end
Stopfen verschlossen ist. Die elektrische Schnittstelle ist dabei bevorzugt im Bereich eines der beiden Gehäusedeckel vorgesehen, besonders bevorzugt im Bereich jenes Deckels, der dem Elektromotor des (in dem zweiten Hohlraum des Profilrohrs untergebrachten) Hydraulikaggregats benachbart ist. Plug is closed. The electrical interface is preferably provided in the region of one of the two housing covers, particularly preferably in the region of that cover, the the electric motor of the (housed in the second cavity of the profile tube) hydraulic unit is adjacent.
Alternativ kann aber auch ein Versorgungskabel den Alternatively, however, a supply cable the
betreffenden Deckel durchdringen. penetrate the relevant lid.
Die vorstehend erwähne Ausführung des Zylinders des The above mentioned execution of the cylinder of
Hydraulikzylinders direkt in dem Gehäuse ist allerdings nicht zwingend. Vielmehr kann, was unter bestimmten Voraussetzungen seinerseits vorteilhaft ist, auch ein gesondertes, in einen in dem Gehäuse ausgeführten Hohlraum eingesetztes Bauteil den Zylinder des Hydraulikzylinders bilden. Hydraulic cylinder directly in the housing is not mandatory. Rather, what is advantageous under certain conditions, even a separate, inserted into a cavity executed in the housing component form the cylinder of the hydraulic cylinder.
Gemäß einer bevorzugten Weiterbildung der Erfindung ist der Hydrauliköl-Behälter durch den zweiten Hohlraum des Gehäuses gebildet, welcher in dem den Gehäusemantel bildenden According to a preferred embodiment of the invention, the hydraulic oil container is formed by the second cavity of the housing, which in which the housing shell forming
Profilrohr ausgeführt ist. Die Wärmeabfuhr aus dem System erfolgt in diesem Falle direkt durch das - im Bereich des Hydrauliköl-Behälters - mit dem Gehäuse des Linearaktuators in Berührung stehende Hydrauliköl. Zudem hat eine solche Ausführung des erfindungsgemäßen Linearaktuators auch Profile tube is executed. The heat removal from the system takes place in this case directly through the - in the hydraulic oil tank - in contact with the housing of the linear actuator in contact hydraulic oil. In addition, such an embodiment of the linear actuator according to the invention also
erhebliche bauliche Vorteile; denn die Pumpe des considerable structural advantages; because the pump of
Hydraulikaggregats kann direkt in dem Hohlraum, welcher Hydraulic unit can directly in the cavity, which
(auch) den Hydrauliköl-Behälter bildet, platziert werden. Besonders bevorzugt ist dabei die Hydraulikpumpe (also) forms the hydraulic oil tank, to be placed. Particularly preferred is the hydraulic pump
wärmeübertragend in den entsprechenden Hohlraum des Gehäuses eingesetzt, z. B. eingepresst oder eingeschrumpft. heat-transmitting used in the corresponding cavity of the housing, for. B. pressed or shrunk.
In abgewandelter Ausführungsform kommt allerdings ebenfalls in Betracht, dass der Hydrauliköl-Behälter ein gesondertes Bauteil bildet, das in den zweiten Hohlraum des den In a modified embodiment, however, also comes into consideration that the hydraulic oil container forms a separate component, which in the second cavity of the
Gehäusemantel bildenden Profilrohrs eingesetzt ist. Besonders bevorzugt liegt in diesem Fall der Hydrauliköl-Behälter flächig wärmeübertragend an der Innenwand des ihn Housing shell forming profile tube is inserted. Particularly preferably, in this case, the hydraulic oil container is heat transfer surface on the inner wall of him
aufnehmenden Hohlraums des Gehäuses an. Ggf. kann dabei im Interesse eines optimalen Wärmeübergangs zwischen dem Hydrauliköl-Behälter und dem Gehäuse eine Wärmeleitpaste oder dergleichen vorgesehen sein. Die weiter oben bereits erwähnte (bevorzugt wärmeübertragende) Aufnahme der Pumpe des receiving cavity of the housing. Possibly. can do this in the interest of optimal heat transfer between the Hydraulic oil container and the housing may be provided a thermal grease or the like. The already mentioned above (preferably heat-transferring) recording of the pump of the
Hydraulikaggregats in dem Hohlraum des Gehäuses erweist sich im Übrigen auch bei dieser Ausgestaltung, d. h. im Falle eines Hydrauliköl-Behälters in Form eines gesonderten, in einem Hohlraum des Gehäuses aufgenommenen Bauteils als vorteilhaft . Hydraulic unit in the cavity of the housing proves incidentally also in this embodiment, d. H. in the case of a hydraulic oil container in the form of a separate, received in a cavity of the housing component advantageous.
Eine andere bevorzugte Weiterbildung des erfindungsgemäßen elektrohydraulischen Linearaktuators zeichnet sich dadurch aus, dass das Gehäuse in räumlicher Nähe zum Hydrauliköl- Behälter an seiner Außenfläche eine flächenvergrößernde Another preferred development of the electro-hydraulic linear actuator according to the invention is characterized in that the housing in the vicinity of the hydraulic oil container on its outer surface a flächenvergrößernde
Oberflächenprofilierung (beispielsweise in Form von Rippen) aufweist. Auch unter extremen Belastungszuständen des elektrohydraulischen Linearaktuators lassen sich auf diese Weise bei besonders kompakten Linearaktuatoren sichere Surface profiling (for example in the form of ribs). Even under extreme load conditions of the electro-hydraulic linear actuator can be safe in this way with very compact linear actuators
Betriebstemperaturen garantieren . Guarantee operating temperatures.
Gemäß einer wiederum anderen bevorzugten Weiterbildung der Erfindung ist besonders vorteilhaft, wenn der Hydrauliköl- Behälter ein Volumen von mindestens dem doppelten Wert der Summe der Volumina der beiden Arbeitsräume aufweist. Auch diese Dimensionierung ist unter Gesichtspunkten eines zuverlässigen Wärmehaushalts günstig. According to yet another preferred embodiment of the invention is particularly advantageous if the hydraulic oil container has a volume of at least twice the value of the sum of the volumes of the two working spaces. This dimensioning is favorable from the standpoint of a reliable heat balance.
Für den Betrieb des erfindungsgemäßen elektrohydraulischen Linearaktuators erweist sich als vorteilhaft, wenn das For the operation of the electro-hydraulic linear actuator according to the invention proves to be advantageous if the
Hydraulikaggregat reversierbar ist. Dabei kann insbesondere zwischen dem Hydraulikaggregat und dem Hydraulikzylinder auf jegliche Steuerventile verzichtet werden. Für die Steuerung des Linearaktuators ist besonders bevorzugt mit dem Kolben des Hydraulikzylinders ein Positionssensor verbunden. Unter bestimmten Voraussetzungen betreffend die baulichen Abmessungen und die Integration des elektrohydraulischen Linearaktuators in die funktionale Peripherie kann sich als günstig erweisen, wenn als Koppelelement nicht eine übliche, endseitig aus dem Gehäuse austretende Kolbenstange vorgesehen ist (bzw. zwei endseitig/stirnseitig aus dem Gehäuse Hydraulic unit is reversible. It can be dispensed with any control valves in particular between the hydraulic unit and the hydraulic cylinder. For the control of the linear actuator is particularly preferably connected to the piston of the hydraulic cylinder, a position sensor. Under certain conditions regarding the physical dimensions and the integration of the electro-hydraulic linear actuator in the functional periphery may prove to be beneficial when not a conventional, end of the housing exiting piston rod is provided as the coupling element (or two end / front side of the housing
austretende Kolbenstangenabschnitte vorgesehen sind) , sondern wenn die mechanische Schnittstelle mit dem betreffenden exiting piston rod sections are provided), but when the mechanical interface with the relevant
Gehäusedurchbruch vielmehr anderweitig realisiert ist, beispielsweise zwischen den beiden hydraulischen Housing breakthrough is rather realized otherwise, for example, between the two hydraulic
Arbeitsräumen seitlich an dem Gehäuse angeordnet vergleichbar dem Konzept nach der WO 94/23231 AI, der CN 102853149 B und der CN 103791143 A. Durch einen Wegfall der den jeweiligen Arbeitsraum durchsetzenden Kolbenstange stünde in diesem Fall bei vorgegebenen Abmessungen eine maximale Kolbenfläche zur Verfügung mit dem Ergebnis einer besonders hohen Working spaces laterally arranged on the housing comparable to the concept according to WO 94/23231 AI, CN 102853149 B and CN 103791143 A. By eliminating the respective working space passing through the piston rod would in this case at given dimensions a maximum piston area available with the Result of a particularly high
Verstellkraft; und zudem würden Abdichtungen der Kolbenstange (bzw. der beiden Kolbenstangeabschnitte) an deren adjusting; and also seals the piston rod (or the two piston rod sections) at the
Durchführung (en) durch das Gehäuse entfallen. Passage through the housing omitted.
In abermals anderer bevorzugter Weiterbildung der Erfindung ist ein manuell betätigbares Wegeventil vorgesehen, welches geeignet ist, alternativ zu einer Beaufschlagung des In yet another preferred embodiment of the invention, a manually operable directional control valve is provided, which is suitable, alternatively to a loading of the
Hydraulikzylinders durch das Hydraulikaggregat eine direkte hydraulische Verbindung zwischen den beiden Arbeitsräumen des Hydraulikzylinders herzustellen. Durch einen solchen Hydraulic cylinder through the hydraulic unit to establish a direct hydraulic connection between the two working spaces of the hydraulic cylinder. By such
"Kurzschluss " der beiden Arbeitsräume ist im Falle einer Störung, beispielsweise bei einem Stromausfall oder einem durch sonstige Gründe hervorgerufenen Ausfall der Steuerung des Linearaktuators, eine manuelle Verstellung der "Short circuit" of the two work spaces is in case of failure, for example in case of power failure or caused by other reasons failure of the control of the linear actuator, a manual adjustment of the
Kolbeneinheit von außen (über das Koppelelement) möglich. So lässt sich - im Notfall - händisch auf die Stellung des mechanischen Verbrauchers, zu dessen Betätigung der Piston unit from the outside (via the coupling element) possible. Thus, in case of an emergency, the position of the mechanical consumer can be set manually
elektrohydraulische Linearaktuators vorgesehen ist, Einfluss nehmen, und zwar schnellstmöglich und ohne aufwändige Maßnahmen wie beispielsweise eine mechanische Trennung der Verbindung zwischen Koppelelement des Linearaktuators und mechanischem Verbraucher. Electro-hydraulic linear actuator is provided to influence, as quickly as possible and without consuming Measures such as a mechanical separation of the connection between coupling element of the linear actuator and mechanical consumer.
Die Ausführung des dem Hydraulikaggregat zugehörigen The execution of the hydraulic unit associated
bürstenlosen Elektromotors als Außenläufermotor trägt dabei in besonderer Weise zu der Möglichkeit bei, einen Brushless electric motor as external rotor motor contributes in a special way to the possibility of a
elektrohydraulischen Linearaktuator mit besonders hoher Leistungsdichte, d. h. einem besonders günstigen Verhältnis zwischen mechanischer Leistung am Ausgang und Baugröße, zu realisieren. Für Anwendungen, in denen der benötigte Bauraum des elektrohydraulischen Linearaktuators nicht die kritische Größe bzw. der limitierende Faktor ist, so dass es auf eine geringe Baugröße nicht entscheidend ankommt, lassen sich die übrigen weiter oben dargelegten Vorteile des Electro-hydraulic linear actuator with very high power density, d. H. a particularly favorable ratio between mechanical power at the output and size to realize. For applications in which the space required for the electro-hydraulic linear actuator is not the critical size or the limiting factor, so that it does not depend on a small size is crucial, the other advantages set forth above
erfindungsgemäßen elektrohydraulischen Linearaktuators (mit Ausnahme der nur minimalen Baumaße) in einer Abwandlung erreichen, nämlich unter Verwendung eines bürstenlosen inventive electro-hydraulic linear actuator (with the exception of only minimal dimensions) achieve in a modification, namely using a brushless
Innenläufermotors anstelle eines bürstenlosen Internal rotor motor instead of a brushless
Außenläufermotors . External rotor motor.
Im Folgenden wird die vorliegende Erfindung anhand eines in der Zeichnung in teilweise schematischer Weise In the following, the present invention will be described with reference to a drawing in a partially schematic manner
veranschaulichten bevorzugten Ausführungsbeispiels näher erläutert. Gezeigt ist dabei ein Längsschnitt durch einen die vorliegende Erfindung realisierenden elektrohydraulischen Linearaktuator . illustrated preferred embodiment explained in more detail. Shown here is a longitudinal section through an electrohydraulic linear actuator implementing the present invention.
Dieser umfasst ein Gehäuse 1, welches aus drei Teilen This comprises a housing 1, which consists of three parts
zusammengefügt ist, nämlich aus einem einen Gehäusemantel 2 und zwei stirnseitig an diesem angesetzten Gehäusedeckeln 3, 4. Der Gehäusemantel 2 ist dabei durch einen Abschnitt eines als Aluminium-Strangpressprofil ausgeführten Profilrohres gebildet. In diesem sind mehrere Hohlräume 5, 6 ausgeführt, welche sich entsprechend der Herstellung des Gehäusemantels als Strangpressprofil durchgehend von einem zum anderen is joined together, namely from a housing shell 2 and two frontally attached to this housing covers 3, 4. The housing shell 2 is formed by a section of a running as an aluminum extruded profile tube. In this a plurality of cavities 5, 6 are carried out, which is in accordance with the production of the housing shell as extruded profile continuously from one to the other
Gehäusedeckel 3, 4 erstrecken. Housing cover 3, 4 extend.
Ein erster, einen kreiszylindrischen Querschnitt aufweisender Hohlraum 5 bildet dabei den - direkt in dem Gehäuse 1 A first, a circular cylindrical cross-section having cavity 5 forms the - directly in the housing first
ausgeführten - Zylinder 7 eines Hydraulikzylinders 8, welcher weiterhin eine in dem Zylinder längs der Achse verschiebbar geführte Kolbeneinheit 9 mit zwei dichtend in dem Zylinder 7 geführten Kolben 10 umfasst. Der Hydraulikzylinder 8 ist als doppeltwirkender Gleichlaufzylinder ausgeführt, so dass die Kolbeneinheit 9 zwei querschnittsgleiche hydraulische executed - cylinder 7 of a hydraulic cylinder 8, which further comprises a displaceable in the cylinder along the axis guided piston unit 9 with two sealingly guided in the cylinder 7 piston 10. The hydraulic cylinder 8 is designed as a double-acting constant-velocity cylinder, so that the piston unit 9 two cross-sectional hydraulic equal
Arbeitsräume 11, 12 voneinander abgrenzt. Zum endseitigen dichten Abschluss der beiden Arbeitsräume 11, 12 ist an jedem der beiden Gehäusedeckel 3, 4 ein dichtend in den ersten Hohlraum 5 hineinragender Stopfen 13 ausgeführt. Workrooms 11, 12 separated from each other. For the end-tight sealing of the two working spaces 11, 12, a sealing plug 13 protruding into the first cavity 5 is provided on each of the two housing covers 3, 4.
Mit der Kolbeneinheit 9 sind zwei Kolbenstangenabschnitte 14, 15 verbunden, welche sich durch entsprechende, in den With the piston unit 9, two piston rod sections 14, 15 are connected, which by corresponding, in the
Gehäusedeckeln 3, 4 vorgesehene Durchbrüche 16 hindurch erstrecken. Die Kolbenstangenabschnitte 14, 15 stellen dabei jeweils ein Koppelelement 17 dar, welches - als mechanischer Ausgang des Linearaktuators - eine mechanische Schnittstelle zur Kolbeneinheit 9 des Hydraulikzylinders 8 bildet. Zum Schutz vor einer Verschmutzung der Kolbenstangenabschnitte 14, 15 im Bereich des jeweiligen Durchtritts durch den zugeordneten Gehäusedurchbruch 16 sind (nur beispielhaft) zwei Bälge 18 veranschaulicht. Housing covers 3, 4 provided openings 16 extend therethrough. The piston rod sections 14, 15 each represent a coupling element 17 which, as a mechanical output of the linear actuator, forms a mechanical interface with the piston unit 9 of the hydraulic cylinder 8. To protect against contamination of the piston rod sections 14, 15 in the region of the respective passage through the associated housing aperture 16 (only by way of example) two bellows 18 are illustrated.
In dem zweiten Hohlraum 6 des Gehäusemantels 2, welcher sich parallel zu dem ersten Hohlraum 5 erstreckt, ist ein den Hydraulikzylinder 8 beaufschlagendes, eine Hydraulikpumpe 20 und einen diese antreibenden, bürstenlosen Elektromotor 21 umfassendes reversierbares Hydraulikaggregat 22 In the second cavity 6 of the housing shell 2, which extends parallel to the first cavity 5, is a reversible hydraulic unit 22 which acts on the hydraulic cylinder 8, a hydraulic pump 20 and a brushless electric motor 21 driving the same
untergebracht. Das Pumpengehäuse 23 ist dabei dichtend in den betreffenden Hohlraum 6 eingesetzt, so dass es weiterhin einen in dem zweiten Hohlraum 6 ausgeführten, durch diesen gebildeten Hydrauliköl-Behälter 24 begrenzt. Der ebenfalls den Hydrauliköl-Behälter 24 begrenzende Gehäusedeckel 4 weist eine in dem Hydrauliköl-Behälter mündende Befüll- und accommodated. The pump housing 23 is sealingly inserted into the relevant cavity 6, so that it continues delimiting a hydraulic oil reservoir 24 formed in the second cavity 6. The likewise the hydraulic oil tank 24 limiting housing cover 4 has a filling in the hydraulic oil tank filling and
Entlüftungseinrichtung 25 auf. Die beiden Druckausgänge 26 der Hydraulikpumpe 20 sind über Leitungen 27 mit jeweils einem Anschluss 28 des betreffenden hydraulischen Venting device 25 on. The two pressure outputs 26 of the hydraulic pump 20 are via lines 27, each with a port 28 of the relevant hydraulic
Arbeitsraums 11, 12 verbunden. Veranschaulicht ist weiterhin ein optional vorgesehenes Wegeventil 19, welches Working space 11, 12 connected. Illustrated is also an optionally provided directional control valve 19, which
strömungstechnisch zwischen den beiden Druckausgängen 26 der Hydraulikpumpe 20 und den Anschlüssen 28 der hydraulischen Arbeitsräume 11, 12 vorgesehen und dazu geeignet ist, fluidically provided between the two pressure outputs 26 of the hydraulic pump 20 and the terminals 28 of the hydraulic working spaces 11, 12 and is suitable,
alternativ zu einer Beaufschlagung des Hydraulikzylinders 8 durch das Hydraulikaggregat 22 - über die entsprechenden Abschnitte der Leitungen 27 - eine direkte hydraulische Alternatively to an admission of the hydraulic cylinder 8 by the hydraulic unit 22 - via the corresponding sections of the lines 27 - a direct hydraulic
Verbindung zwischen den beiden Arbeitsräumen 11 und 12 herzustellen. Das Wegeventil 19 ist manuell betätigbar. Make connection between the two working spaces 11 and 12. The directional control valve 19 is manually operable.
Hierzu ist ein außerhalb des Gehäuses 1 angeordneter, auf das Wegeventil 19 wirkender Betätigungshebel vorgesehen. For this purpose, arranged outside the housing 1, acting on the directional control valve 19 actuating lever is provided.
Der Elektromotor 21 des Hydraulikaggregats 22 umfasst einen mit dem Pumpenrotor gekoppelten Außenläufer 29 und einen Innenstator 30. Letzterer ist auf einen die elektronische Steuerung umfassenden Steuerblock 31 aufgesetzt, welcher seinerseits an dem zugeordneten Gehäusedeckel 3 angebracht ist. An dem betreffenden Gehäusedeckel 3 befindet sich die elektrische Eingangs-Schnittstelle 32. Durch die The electric motor 21 of the hydraulic unit 22 comprises an external rotor 29 coupled to the pump rotor and an internal stator 30. The latter is mounted on a control block 31 comprising the electronic control, which in turn is mounted on the associated housing cover 3. At the housing cover 3 in question is the electrical input interface 32. By the
Unterbringung des Hydraulikzylinders 8 einerseits und der Funktionsgruppe Hydrauliköl-Behälter 24 und Hydraulikaggregat 22 andererseits in zwei zueinander parallelen Hohlräumen 5, 6 des Gehäuses 1 ergibt sich, auf die Achse X des Housing the hydraulic cylinder 8 on the one hand and the functional group hydraulic oil tank 24 and hydraulic unit 22 on the other hand in two mutually parallel cavities 5, 6 of the housing 1 results, on the axis X of the
Hydraulikzylinders 8 bezogen, eine Anordnung des Hydraulic cylinder 8 based, an arrangement of
Hydraulikaggregats 22 und des Hydrauliköl-Behälters 24 seitlich neben dem Hydraulikzylinders 8. Der Gehäusemantel 2 weist in seinem den Hydrauliköl-Behälter 24 umgebenden Bereich an seiner Außenseite Kühlrippen 33 auf. Über diese wird nicht nur das in dem Hydrauliköl-Behälter 24 befindliche Hydrauliköl temperiert, sondern auch die in der Hydraulikpumpe 20 entstehende Verlustwärme abgeführt. Im Hinblick auf einen günstigen Wärmehaushalt wird mittels eines in den Hydrauliköl-Behälter 24 hineinragenden, an die Hydraulic unit 22 and the hydraulic oil container 24 laterally adjacent to the hydraulic cylinder eighth In its region surrounding the hydraulic oil container 24, the housing jacket 2 has cooling ribs 33 on its outer side. Not only the hydraulic oil contained in the hydraulic oil tank 24 is tempered by these, but also the heat loss generated in the hydraulic pump 20 is dissipated. With regard to a favorable heat balance is by means of a projecting into the hydraulic oil tank 24, to the
Hydraulikpumpe 20 angeschlossenen Rohres 34 - unter Hydraulic pump 20 connected pipe 34 - under
Vermeidung eines hydraulischen Kurzschlusses - eine Umwälzung des in dem Hydrauliköl-Behälter 24 befindlichen Hydrauliköls während des Pumpbetriebs der Hydraulikpumpe 20 erreicht. Avoiding a hydraulic short circuit - a circulation of the present in the hydraulic oil tank 24 hydraulic oil during the pumping operation of the hydraulic pump 20 achieved.
Gezeigt ist schließlich eine Einrichtung zur Erfassung der Position der Kolbeneinheit. Diese umfasst einen gehäusefesten Positionssensor 35 und einen an der Kolbeneinheit 9 fixierten Geber 36. Das Positionssignal des Positionssensors 35 wird über die Signalleitung 37 auf die elektronische Steuerung geschaltet . Finally, a device for detecting the position of the piston unit is shown. This comprises a housing-fixed position sensor 35 and a fixed to the piston unit 9 encoder 36. The position signal of the position sensor 35 is connected via the signal line 37 to the electronic control.

Claims

Ansprüche claims
1. Elektrohydraulischer Linearaktuator mit den folgenden Merkmalen : 1. Electrohydraulic linear actuator with the following features:
- der Linearaktuator umfasst ein Gehäuse (1), in welchem ein Hydraulikzylinder (8), ein diesen beaufschlagendes Hydraulikaggregat (22) sowie ein Hydrauliköl-Behälter (24) untergebracht sind;  - The linear actuator comprises a housing (1) in which a hydraulic cylinder (8), a hydraulic unit acting on this (22) and a hydraulic oil container (24) are housed;
- bezogen auf die Achse (X) des Hydraulikzylinders (8) sind das Hydraulikaggregat (22) und der Hydrauliköl- Behälter (24) neben dem Hydraulikzylinder (8)  - relative to the axis (X) of the hydraulic cylinder (8) are the hydraulic unit (22) and the hydraulic oil container (24) adjacent to the hydraulic cylinder (8)
angeordnet ;  arranged;
- das Gehäuse (1) besteht aus einem einen Gehäusemantel (2) bildenden Profilrohr, in dem mehrere Hohlräume (5, 6) ausgeführt sind und welches mittels zweier  - The housing (1) consists of a housing shell (2) forming profile tube, in which a plurality of cavities (5, 6) are executed and which by means of two
stirnseitig an den Gehäusemantel (2) angesetzter Gehäusedeckel (3, 4) endseitig verschlossen ist; the end face of the housing shell (2) attached housing cover (3, 4) is closed at the end;
- der Hydraulikzylinder (8) ist als doppeltwirkender - The hydraulic cylinder (8) is as double-acting
Gleichlaufzylinder ausgeführt mit einer in einem Zylinder (7) geführten, zwei querschnittsgleiche Arbeitsräume (11, 12) voneinander abgrenzenden Kolbeneinheit (9);  Synchronization cylinder running with a in a cylinder (7) out, two cross-section equal working spaces (11, 12) delimiting each piston unit (9);
- der Zylinder (7) ist durch einen ersten Hohlraum (5) des Profilrohres ausgebildet;  - The cylinder (7) is formed by a first cavity (5) of the profile tube;
- das Gehäuse (1) weist mindestens einen Durchbruch (16) für ein eine mechanische Schnittstelle zur  - The housing (1) has at least one opening (16) for a mechanical interface to
Kolbeneinheit (9) des Hydraulikzylinders (8) bildendes Koppelelement (17) auf;  Piston unit (9) of the hydraulic cylinder (8) forming the coupling element (17);
- in einem sich parallel zum ersten Hohlraum (5)  in a parallel to the first cavity (5)
erstreckenden zweiten Hohlraum (6) des Profilrohrs ist das Hydraulikaggregat (22) untergebracht und der Hydrauliköl-Behälter (24) ausgeführt; - der Elektromotor (21) des Hydraulikaggregats (22) ist als bürstenloser Außenläufermotor ausgeführt. extending second cavity (6) of the profile tube, the hydraulic unit (22) is housed and the hydraulic oil tank (24) executed; - The electric motor (21) of the hydraulic unit (22) is designed as a brushless external rotor motor.
2. Elektrohydraulischer Linearaktuator nach Anspruch 1, dadurch gekennzeichnet, dass die Gehäusedeckel (3, 4) in den ersten Hohlraum (5) hineinragende Stopfen (13) aufweisen . 2. Electro-hydraulic linear actuator according to claim 1, characterized in that the housing cover (3, 4) in the first cavity (5) protruding plug (13).
3. Elektrohydraulischer Linearaktuator nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass an einem 3. Electro-hydraulic linear actuator according to claim 1 or claim 2, characterized in that on a
Gehäusedeckel (3) ein eine elektronische Steuerung umfassender Steuerblock (31) angebracht ist.  Housing cover (3) an electronic control comprehensive control block (31) is mounted.
4. Elektrohydraulischer Linearaktuator nach Anspruch 3, dadurch gekennzeichnet, dass der Innenstator (30) des Elektromotors (21) auf den Steuerblock (31) aufgesetzt ist . 4. Electro-hydraulic linear actuator according to claim 3, characterized in that the inner stator (30) of the electric motor (21) is mounted on the control block (31).
5. Elektrohydraulischer Linearaktuator nach Anspruch 3 oder Anspruch 4, dadurch gekennzeichnet, dass sich an dem Gehäusedeckel (3), an dem der Steuerblock (31) 5. Electro-hydraulic linear actuator according to claim 3 or claim 4, characterized in that on the housing cover (3) on which the control block (31)
angebracht ist, eine elektrische Eingangsschnittstelle (32) befindet.  is mounted, an electrical input interface (32) is located.
6. Elektrohydraulischer Linearaktuator nach einem der 6. Electro-hydraulic linear actuator according to one of
Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Gehäuse (1) in räumlicher Nähe zum Hydrauliköl-Behälter (24) an seiner Außenfläche eine flächenvergrößernde Oberflächenprofilierung aufweist .  Claims 1 to 5, characterized in that the housing (1) in spatial proximity to the hydraulic oil container (24) on its outer surface has a flächenvergrößernde surface profiling.
7. Elektrohydraulischer Linearaktuator nach einem der 7. Electro-hydraulic linear actuator according to one of
Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Hydrauliköl-Behälter (24) ein Volumen von mindestens dem doppelten Wert der Summe der Volumina der beiden  Claims 1 to 6, characterized in that the hydraulic oil container (24) has a volume of at least twice the value of the sum of the volumes of the two
Arbeitsräume (11, 12) aufweist. Working spaces (11, 12).
8. Elektrohydraulischer Linearaktuator nach einem der 8. Electrohydraulic linear actuator according to one of
Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Profilrohr aus Aluminium besteht.  Claims 1 to 7, characterized in that the profile tube consists of aluminum.
9. Elektrohydraulischer Linearaktuator nach einem der 9. Electro-hydraulic linear actuator according to one of
Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Profilrohr aus dem Abschnitt eines Strangpressprofils besteht .  Claims 1 to 8, characterized in that the profile tube consists of the section of an extruded profile.
10. Elektrohydraulischer Linearaktuator nach einem der 10. Electrohydraulic linear actuator according to one of
Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Zylinder (7) des Hydraulikzylinders (8) direkt in dem Gehäuse (1) ausgeführt ist.  Claims 1 to 9, characterized in that the cylinder (7) of the hydraulic cylinder (8) is designed directly in the housing (1).
11. Elektrohydraulischer Linearaktuator nach einem der 11. Electrohydraulic linear actuator according to one of
Ansprüche 1 bis 10, dadurch gekennzeichnet, dass das Hydraulikaggregat (22) reversierbar ist.  Claims 1 to 10, characterized in that the hydraulic unit (22) is reversible.
12. Elektrohydraulischer Linearaktuator nach einem der 12. Electrohydraulic linear actuator according to one of
Ansprüche 1 bis 11, dadurch gekennzeichnet, dass  Claims 1 to 11, characterized in that
zwischen dem Hydraulikaggregat (22) und dem  between the hydraulic unit (22) and the
Hydraulikzylinder (8) keine Proportional-Steuerventile vorhanden sind.  Hydraulic cylinder (8) no proportional control valves are present.
13. Elektrohydraulischer Linearaktuator nach einem der 13. Electro-hydraulic linear actuator according to one of
Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Kolbeneinheit (9) des Hydraulikzylinders (8) mit einem Positionssensor (35) wirkverbunden ist.  Claims 1 to 12, characterized in that the piston unit (9) of the hydraulic cylinder (8) with a position sensor (35) is operatively connected.
14. Elektrohydraulischer Linearaktuator nach einem der 14. Electrohydraulic linear actuator according to one of
Ansprüche 1 bis 13, dadurch gekennzeichnet, dass der mindestens eine Durchbruch (16) des Gehäuses (1) für das Koppelelement (17) stirnseitig an dem Gehäuse (1) angeordnet ist. Elektrohydraulischer Linearaktuator nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass ein manuell betätigbares Wegeventil (19) vorgesehen ist, mittels dessen eine direkte hydraulische Verbindung zwischen den beiden Arbeitsräumen (11, 12) herstellbar ist . Claims 1 to 13, characterized in that the at least one opening (16) of the housing (1) for the coupling element (17) on the front side of the housing (1) is arranged. Electro-hydraulic linear actuator according to one of claims 1 to 14, characterized in that a manually operable directional control valve (19) is provided, by means of which a direct hydraulic connection between the two working spaces (11, 12) can be produced.
EP17723691.6A 2016-05-18 2017-05-15 Electrohydraulic linear actuator Active EP3387267B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016109103.0A DE102016109103A1 (en) 2016-05-18 2016-05-18 Electrohydraulic linear actuator
PCT/EP2017/061625 WO2017198625A1 (en) 2016-05-18 2017-05-15 Electrohydraulic linear actuator

Publications (2)

Publication Number Publication Date
EP3387267A1 true EP3387267A1 (en) 2018-10-17
EP3387267B1 EP3387267B1 (en) 2020-03-25

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ID=58709476

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Application Number Title Priority Date Filing Date
EP17723691.6A Active EP3387267B1 (en) 2016-05-18 2017-05-15 Electrohydraulic linear actuator

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US (1) US10619653B2 (en)
EP (1) EP3387267B1 (en)
JP (1) JP6905996B2 (en)
CN (1) CN108779788B (en)
DE (1) DE102016109103A1 (en)
WO (1) WO2017198625A1 (en)

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Also Published As

Publication number Publication date
DE102016109103A1 (en) 2017-11-23
CN108779788A (en) 2018-11-09
EP3387267B1 (en) 2020-03-25
CN108779788B (en) 2021-03-16
US10619653B2 (en) 2020-04-14
JP2019516926A (en) 2019-06-20
WO2017198625A1 (en) 2017-11-23
US20190085873A1 (en) 2019-03-21
JP6905996B2 (en) 2021-07-21

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