EP1857674A1 - Hydraulic assembly - Google Patents

Hydraulic assembly Download PDF

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Publication number
EP1857674A1
EP1857674A1 EP20070007284 EP07007284A EP1857674A1 EP 1857674 A1 EP1857674 A1 EP 1857674A1 EP 20070007284 EP20070007284 EP 20070007284 EP 07007284 A EP07007284 A EP 07007284A EP 1857674 A1 EP1857674 A1 EP 1857674A1
Authority
EP
European Patent Office
Prior art keywords
valve block
housing
hydraulic
tank housing
tank
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
EP20070007284
Other languages
German (de)
French (fr)
Other versions
EP1857674B1 (en
Inventor
Günter Dipl.-Ing. Hellmann
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.)
Jungheinrich AG
Original Assignee
Jungheinrich 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 Jungheinrich AG filed Critical Jungheinrich AG
Publication of EP1857674A1 publication Critical patent/EP1857674A1/en
Application granted granted Critical
Publication of EP1857674B1 publication Critical patent/EP1857674B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
    • F04B23/026—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir a pump-side forming a wall of the reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
    • F04B23/028—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir the pump being mounted on top of the reservoir
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump
    • Y10T137/86035—Combined with fluid receiver
    • Y10T137/86059—Hydraulic power unit

Definitions

  • the invention relates to a hydraulic unit according to the preamble of patent claim 1.
  • Hydraulic power units usually consist of a drive motor, a pump, a hydraulic tank and a valve block.
  • the drive motor is usually an electric motor.
  • the hydraulic power pack must be compact. It is therefore already known to immerse the hydraulic pump in the hydraulic medium within a tank housing and to connect the tank housing with the valve block.
  • the stator housing of the motor is flanged to the valve block.
  • the shaft of the electric motor extends through the valve block to the pump to drive it.
  • the valve block contains bores for receiving valves in order to implement a hydraulic circuit for supplying at least one hydraulic consumer.
  • Such compact hydraulic units are used in particular in industrial trucks, which provide little space available.
  • the hydraulic pump supplies e.g. a lifting cylinder, a hydraulic steering or other consumers.
  • the invention has for its object to provide a hydraulic unit, in which the production costs can be significantly reduced.
  • valve block and the stator housing are integrally formed, e.g. cast steel.
  • the stator housing needs no flange to be screwed to the valve block.
  • the processing of such a flange and the valve block is saved for the purpose of intimate connection of the two parts. It is therefore possible to create the hydraulic unit with a significantly low manufacturing and assembly costs.
  • valve block on the side facing the tank housing on an axial annular collar which fits approximately fitting into the interior of the tank housing, while the valve block facing the end of the tank housing engages in a recess on the outside of the annular collar, wherein the outer sides of stator and tank housing are approximately aligned.
  • the single figure shows hinted a hydraulic unit according to the invention.
  • a stator housing 10 is shown for an electric motor, not shown.
  • the stator housing 10 is closed at the upper end by a cover 12, are provided to the terminals 14, 16 for the power supply.
  • the stator housing 10 is formed integrally with a valve block 18.
  • a valve housing is shown at 20, which engages via an opening in the valve block 18.
  • the valve 20 is controllable and has a connection possibility for a supply line to a consumer.
  • annular collar 22 is formed on this. Its outer diameter is slightly smaller than the outer diameter of the valve block 18, so that a recess is provided. In this recess engages a thickened edge 24 of a tank housing 26 a.
  • the tank housing 26 is formed, for example, of plastic material. A connection of the two parts takes place with Help a strap that is placed around the thickened end 24 and tensioned. This is not shown in the drawing.
  • a pump is arranged, which is not shown.
  • the pump draws hydraulic medium from the tank housing 26 from the lower region and conveys the medium to the valve 20.
  • the shaft, not shown, of the electric motor, not shown extends through the valve block 18 through the pump, not shown, to drive them.
  • the return of the hydraulic medium to the tank 26 via a filter via which a filter cartridge is insertable and can be determined by means of a screw cap 30.
  • the filter cartridge is used to filter impurities in the hydraulic fluid in the return flow from the consumer to the tank 26th

Abstract

The unit has a valve block (18) abutting a hydraulic pump, and a controllable valve (20), which is arranged at a supply pipe to a hydraulic consumer. An electric motor has a stator housing (10) on one side of the block, which is opposite to a tank housing (26). A shaft of the motor is coupled with the pump through the block, where the block and the stator housing are formed as a single piece. The block has an axial bundled coil (22) on a side turning towards the tank housing, where the valve block and the stator housing are formed from metal casting.

Description

Die Erfindung bezieht sich auf ein Hydraulikaggregat nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a hydraulic unit according to the preamble of patent claim 1.

Hydraulikaggregate bestehen üblicherweise aus einem Antriebsmotor, einer Pumpe, einem Hydrauliktank und einem Ventilblock. Der Antriebsmotor ist üblicherweise ein Elektromotor. Bei räumlich beengten Verhältnissen ist das Hydraulikaggregat kompakt auszuführen. Es ist daher bereits bekannt geworden, die Hydraulikpumpe in das Hydraulikmedium innerhalb eines Tankgehäuses einzutauchen und das Tankgehäuse mit dem Ventilblock zu verbinden. Auf der gegenüberliegenden Seite wird das Statorgehäuse des Motors an den Ventilblock angeflanscht. Die Welle des Elektromotors erstreckt sich durch den Ventilblock hindurch zur Pumpe, um diese anzutreiben. Der Ventilblock enthält Bohrungen zur Aufnahme von Ventilen, um eine Hydraulikschaltung zur Versorgung mindestens eines hydraulischen Verbrauchers zu verwirklichen. Derartige Kompakt-Hydraulikaggregate werden insbesondere in Flurförderzeugen verwendet, die wenig Bauraum zur Verfügung stellen. Die Hydraulikpumpe versorgt z.B. einen Hubzylinder, eine hydraulische Lenkung oder sonstige Verbraucher.Hydraulic power units usually consist of a drive motor, a pump, a hydraulic tank and a valve block. The drive motor is usually an electric motor. In cramped conditions, the hydraulic power pack must be compact. It is therefore already known to immerse the hydraulic pump in the hydraulic medium within a tank housing and to connect the tank housing with the valve block. On the opposite side, the stator housing of the motor is flanged to the valve block. The shaft of the electric motor extends through the valve block to the pump to drive it. The valve block contains bores for receiving valves in order to implement a hydraulic circuit for supplying at least one hydraulic consumer. Such compact hydraulic units are used in particular in industrial trucks, which provide little space available. The hydraulic pump supplies e.g. a lifting cylinder, a hydraulic steering or other consumers.

Bei der Herstellung und der Montage derartiger Hydraulikaggregate müssen die einzelnen Komponenten, wie Motor, Ventilblock, Ventile, Pumpe, Tank und Filter, zusammenmontiert bzw. -geschraubt werden. Der Fertigungsaufwand ist daher entsprechend hoch.In the manufacture and assembly of such hydraulic power units, the individual components, such as the engine, valve block, valves, pump, tank and filter, must be assembled or bolted together. The production cost is therefore high.

Der Erfindung liegt die Aufgabe zugrunde, ein Hydraulikaggregat zu schaffen, bei dem die Fertigungskosten signifikant gesenkt werden können.The invention has for its object to provide a hydraulic unit, in which the production costs can be significantly reduced.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is solved by the features of patent claim 1.

Bei dem erfindungsgemäßen Hydraulikaggregat sind Ventilblock und Statorgehäuse einteilig geformt, z.B. aus Stahlguß.In the hydraulic unit according to the invention, the valve block and the stator housing are integrally formed, e.g. cast steel.

Bei dem erfindungsgemäßen Hydraulikaggregat braucht das Statorgehäuse keinen Flansch, um mit dem Ventilblock verschraubt zu werden. Darüber hinaus wird die Bearbeitung eines solchen Flansches und des Ventilblocks zwecks inniger Verbindung der beiden Teile gespart. Es ist daher möglich, das Hydraulikaggregat mit einem deutlich geringen Fertigungs- und Montageaufwand zu erstellen.In the hydraulic unit according to the invention, the stator housing needs no flange to be screwed to the valve block. In addition, the processing of such a flange and the valve block is saved for the purpose of intimate connection of the two parts. It is therefore possible to create the hydraulic unit with a significantly low manufacturing and assembly costs.

Nach einer Ausgestaltung der Erfindung weist der Ventilblock auf der dem Tankgehäuse zugekehrten Seite einen axialen Ringbund auf, der annähernd passend in das Innere des Tankgehäuses eingreift, während das dem Ventilblock zugekehrte Ende des Tankgehäuses in einer Ausnehmung an der Außenseite des Ringbunds eingreift, wobei die Außenseiten von Stator- und Tankgehäuse annähernd fluchten.According to one embodiment of the invention, the valve block on the side facing the tank housing on an axial annular collar which fits approximately fitting into the interior of the tank housing, while the valve block facing the end of the tank housing engages in a recess on the outside of the annular collar, wherein the outer sides of stator and tank housing are approximately aligned.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels näher erläutert.The invention will be explained in more detail with reference to an embodiment.

Die einzige Figur zeigt andeutungsweise ein Hydraulikaggregat nach der Erfindung.The single figure shows hinted a hydraulic unit according to the invention.

In der Figur ist ein Statorgehäuse 10 für einen nicht weiter dargestellten elektrischen Motor gezeigt. Das Statorgehäuse 10 ist am oberen Ende durch einen Deckel 12 geschlossen, an dem Anschlüsse 14, 16 für die Stromversorgung vorgesehen sind. Wie erkennbar, ist das Statorgehäuse 10 einteilig mit einem Ventilblock 18 geformt. In der Figur ist bei 20 ein Ventilgehäuse dargestellt, das über eine Öffnung in den Ventilblock 18 eingreift. Das Ventil 20 ist steuerbar und weist eine Anschlußmöglichkeit für eine Zuleitung zu einem Verbraucher auf.In the figure, a stator housing 10 is shown for an electric motor, not shown. The stator housing 10 is closed at the upper end by a cover 12, are provided to the terminals 14, 16 for the power supply. As can be seen, the stator housing 10 is formed integrally with a valve block 18. In the figure, a valve housing is shown at 20, which engages via an opening in the valve block 18. The valve 20 is controllable and has a connection possibility for a supply line to a consumer.

An der dem Statorgehäuse 10 gegenüberliegenden Seite des Ventilblocks 18 ist an diesem ein Ringbund 22 angeformt. Sein Außendurchmesser ist etwas geringer als der Außendurchmesser des Ventilblocks 18, so daß eine Ausnehmung geschaffen ist. In dieser Ausnehmung greift ein verdickter Rand 24 eines Tankgehäuses 26 ein. Das Tankgehäuse 26 ist z.B. aus Kunststoffmaterial geformt. Eine Verbindung der beiden Teile erfolgt mit Hilfe eines Spannbandes, das um das verdickte Ende 24 herum gelegt und gespannt wird. Dies ist in der Zeichnung nicht dargestellt.At the stator housing 10 opposite side of the valve block 18, an annular collar 22 is formed on this. Its outer diameter is slightly smaller than the outer diameter of the valve block 18, so that a recess is provided. In this recess engages a thickened edge 24 of a tank housing 26 a. The tank housing 26 is formed, for example, of plastic material. A connection of the two parts takes place with Help a strap that is placed around the thickened end 24 and tensioned. This is not shown in the drawing.

Im Tankgehäuse 26 ist eine Pumpe angeordnet, was nicht weiter dargestellt ist. Die Pumpe saugt Hydraulikmedium aus dem Tankgehäuse 26 aus dem unteren Bereich an und fördert das Medium zum Ventil 20. Die nicht gezeigte Welle des nicht gezeigten Elektromotors erstreckt sich durch den Ventilblock 18 hindurch zur nicht gezeigten Pumpe, um diese anzutreiben. Die Rückleitung des Hydraulikmediums zum Tank 26 erfolgt über einen Filter. In der Figur ist ein schräger Anschlußstutzen 28 gezeigt, über den eine Filterpatrone einführbar ist und mit Hilfe einer Schraubkappe 30 festgelegt werden kann. Die Filterpatrone dient zur Filterung von Verunreinigungen im Hydraulikmedium beim Rückfluß vom Verbraucher zum Tank 26.In the tank housing 26, a pump is arranged, which is not shown. The pump draws hydraulic medium from the tank housing 26 from the lower region and conveys the medium to the valve 20. The shaft, not shown, of the electric motor, not shown extends through the valve block 18 through the pump, not shown, to drive them. The return of the hydraulic medium to the tank 26 via a filter. In the figure, an oblique connection piece 28 is shown, via which a filter cartridge is insertable and can be determined by means of a screw cap 30. The filter cartridge is used to filter impurities in the hydraulic fluid in the return flow from the consumer to the tank 26th

Claims (3)

Hydraulikaggregat, mit einem Tankgehäuse zur Aufnahme eines Hydraulikmediums, in dem eine Hydraulikpumpe angeordnet ist und an das ein Ventilblock angrenzt, an dem mindestens ein steuerbares Ventil in einer Zuleitung zu einem hydraulischen Verbraucher angeordnet ist, und einem Elektromotor, der auf der dem Tankgehäuse gegenüberliegende Seite des Ventilblocks ein Statorgehäuse aufweist und dessen Welle durch den Ventilblock hindurch mit der Hydraulikpumpe gekoppelt ist, dadurch gekennzeichnet, daß Ventilblock (18) und Statorgehäuse (10) einteilig geformt sind.Hydraulic unit, comprising a tank housing for receiving a hydraulic medium, in which a hydraulic pump is arranged and adjacent to a valve block, on which at least one controllable valve is arranged in a supply line to a hydraulic consumer, and an electric motor, on the opposite side of the tank housing the valve block has a stator housing and whose shaft is coupled through the valve block with the hydraulic pump, characterized in that the valve block (18) and stator housing (10) are integrally formed. Hydraulikaggregat nach Anspruch 1, dadurch gekennzeichnet, daß der Ventilblock auf der dem Tankgehäuse (26) zugekehrten Seite einen axialen Ringbund (22) aufweist, der annähernd passend in das Innere des Tankgehäuses (26) eingreift, während das dem Ventilblock (18) zugekehrte Ende des Tankgehäuses (26) in einer Ausnehmung an der Außenseite des Ringbundes (22) eingreift, wodurch die Außenseiten von Statorgehäuse und Tankgehäuse annähernd fluchten.Hydraulic unit according to Claim 1, characterized in that the valve block has an axial annular collar (22) on the side facing the tank housing (26) which approximately fits into the interior of the tank housing (26), while the end facing the valve block (18) of the tank housing (26) engages in a recess on the outside of the annular collar (22), whereby the outer sides of the stator housing and the tank housing are approximately aligned. Hydraulikaggregat nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß Ventilblock (18) und Statorgehäuse (10) aus Metallguß geformt sind.Hydraulic unit according to claim 1 or 2, characterized in that the valve block (18) and stator housing (10) are formed from cast metal.
EP20070007284 2006-05-10 2007-04-07 Hydraulic assembly Expired - Fee Related EP1857674B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610021682 DE102006021682A1 (en) 2006-05-10 2006-05-10 hydraulic power unit

Publications (2)

Publication Number Publication Date
EP1857674A1 true EP1857674A1 (en) 2007-11-21
EP1857674B1 EP1857674B1 (en) 2009-12-09

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EP20070007284 Expired - Fee Related EP1857674B1 (en) 2006-05-10 2007-04-07 Hydraulic assembly

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US (1) US20070261741A1 (en)
EP (1) EP1857674B1 (en)
CN (1) CN101070830B (en)
DE (2) DE102006021682A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010004650A1 (en) * 2010-01-13 2011-07-14 Jungheinrich AG, 22047 Hydraulic unit for industrial trucks
DE102010062936A1 (en) 2010-12-13 2012-06-14 Jungheinrich Aktiengesellschaft hydraulic power unit
US10317855B2 (en) * 2016-05-31 2019-06-11 Yokogawa Electric Corporation Method for detection of diagnosing control valve stiction
DE102016114635B4 (en) * 2016-08-08 2018-09-20 Hoerbiger Automatisierungstechnik Holding Gmbh processing machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199356A5 (en) * 1972-09-09 1974-04-05 Frankl & Kirchner
DE29519941U1 (en) * 1995-12-15 1997-04-17 Wagner Paul Heinz Hydraulic pump unit
EP1008750A1 (en) * 1998-12-07 2000-06-14 Robert Bosch Gmbh Compact hydraulic power unit
EP1106827A2 (en) * 1999-12-07 2001-06-13 Hoerbiger Hydraulik GmbH Hydraulic pump unit
EP1231385A1 (en) * 2001-02-07 2002-08-14 Robert Bosch Gmbh Device for supply of hydraulic oil, lubricating oil or similar

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US3515167A (en) * 1968-08-22 1970-06-02 Ernest J Svenson Hydraulic and electrical power unit
DE3839689C2 (en) * 1988-11-24 1998-03-19 Rudolf Pickel Hydraulic pump unit that can be assembled as a modular system and driven by an electric motor
US5620309A (en) * 1995-01-27 1997-04-15 Todden; Terry J. Fluid pump priming system
DE29809935U1 (en) * 1998-06-03 1998-10-08 Heilmeier & Weinlein Hydraulic motor pump unit
GB9916947D0 (en) * 1999-07-21 1999-09-22 Smiths Industries Plc Hydraulic units
US6435846B1 (en) * 1999-10-22 2002-08-20 Wagner Spray Tech Corporation Piston pump having housing with a pump housing and a pump assembly drive housing formed therein
DE20007554U1 (en) * 2000-04-26 2000-08-10 Heilmeier & Weinlein Motor pump unit
DE10028957C2 (en) * 2000-06-16 2002-07-11 Lukas Hydraulik Gmbh & Co Kg Portable hydraulic pump unit
ITRE20020002A1 (en) * 2002-01-11 2003-07-11 Bucher Hydraulics S P A COMPLEX VALVE GROUP FOR HYDRAULIC CIRCUITS, IN PARTICULAR FOR THE POWER UNIT

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2199356A5 (en) * 1972-09-09 1974-04-05 Frankl & Kirchner
DE29519941U1 (en) * 1995-12-15 1997-04-17 Wagner Paul Heinz Hydraulic pump unit
EP1008750A1 (en) * 1998-12-07 2000-06-14 Robert Bosch Gmbh Compact hydraulic power unit
EP1106827A2 (en) * 1999-12-07 2001-06-13 Hoerbiger Hydraulik GmbH Hydraulic pump unit
EP1231385A1 (en) * 2001-02-07 2002-08-14 Robert Bosch Gmbh Device for supply of hydraulic oil, lubricating oil or similar

Also Published As

Publication number Publication date
CN101070830A (en) 2007-11-14
EP1857674B1 (en) 2009-12-09
DE502007002235D1 (en) 2010-01-21
DE102006021682A1 (en) 2007-11-15
US20070261741A1 (en) 2007-11-15
CN101070830B (en) 2012-05-30

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