EP0087816B1 - Hydraulic lifting device - Google Patents

Hydraulic lifting device Download PDF

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Publication number
EP0087816B1
EP0087816B1 EP83102029A EP83102029A EP0087816B1 EP 0087816 B1 EP0087816 B1 EP 0087816B1 EP 83102029 A EP83102029 A EP 83102029A EP 83102029 A EP83102029 A EP 83102029A EP 0087816 B1 EP0087816 B1 EP 0087816B1
Authority
EP
European Patent Office
Prior art keywords
chamber
geared pump
lifting device
pressure chamber
electric motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83102029A
Other languages
German (de)
French (fr)
Other versions
EP0087816A1 (en
Inventor
Jesus Iciz Arbeloa
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.)
Individual
Original Assignee
Individual
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
Priority claimed from ES1982263602U external-priority patent/ES263602Y/en
Priority claimed from ES1983270376U external-priority patent/ES270376Y/en
Application filed by Individual filed Critical Individual
Priority to AT83102029T priority Critical patent/ATE24875T1/en
Publication of EP0087816A1 publication Critical patent/EP0087816A1/en
Application granted granted Critical
Publication of EP0087816B1 publication Critical patent/EP0087816B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/44—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with self-contained electric driving motors

Definitions

  • the invention relates to a hydraulic lifting device according to the preamble of claim 1.
  • a hydraulic lifting device is known from US-A-1 690 181.
  • the electric motor and the gear pump are arranged in the axial extension of the lifting cylinder.
  • the invention has for its object to design a hydraulic lifting device according to the preamble of claim 1 so that there is a particularly compact design.
  • the hydraulic lifting device shown in the drawing contains, in a housing body 1, an electric motor 2, a gear pump 3 consisting of two meshing pinions and a lifting cylinder 10 'with a piston 11' slidably disposed therein.
  • the housing body 1 contains a chamber 27 for receiving the electric motor 2 and the gear pump 3 and two secondary chambers 30, 31 (cf. FIG. 2).
  • the lifting cylinder 10 ', the chamber 27 and the secondary chambers 30, 31 are arranged axially parallel (see. Fig. 2 and 3).
  • the electric motor 2 and the gear pump 3 are separated from one another by a transverse wall 28, the lower part of the chamber 27 receiving the gear pump 3 being connected to the two secondary chambers 30, 31 via openings 34, 37 and together with these two secondary chambers 30, 31 Storage space for the hydraulic fluid forms.
  • the upper region of the pressure chamber 12 'or of the lifting cylinder 10' is connected via an opening 36 to the secondary chamber 30, the lower region of which is connected via the above-mentioned opening 37 to the chamber 27 receiving the gear pump 3.
  • the electric motor 2 is a DC motor with an operating voltage of 12 V, so that a vehicle battery can be used as an energy source for the hydraulic lifting device.
  • the shaft 5 of the electric motor 2 is connected to the shaft 6 of the gear pump 3 via a coupling.
  • An annular seal 29 is provided on the circumference of the transverse wall 28.
  • a seal 24 is also located on the circumference of the piston 11 ', the piston rod 13' of which is guided through the cover 32 of the housing body 1 and carries a support head 19 for the object to be lifted.
  • a one-way valve is arranged in a collector 35 between the gear pump 3 and the pressure chamber 12 ', from which on the one hand a connecting line 23' leads to the pressure chamber 12 'and from which on the other hand a return line 39 leads to the chamber 27 receiving the gear pump 3.
  • a manually operated return valve 38 is arranged in this return line 39.
  • the line leading from the gear pump 3 to the collector 35 is labeled 40.
  • the return valve 38 is operated by hand. This creates a connection between the collector 35 and the return line 39, so that oil from the pressure chamber 12 'can flow back into the chamber 27 via the connecting line 23'. As a result, the piston 11 'drops.

Description

Die Erfindung betrifft eine hydraulische Hubvorrichtung entsprechend dem Oberbegriff des Anspruches 1.The invention relates to a hydraulic lifting device according to the preamble of claim 1.

Eine hydraulische Hubvorrichtung entsprechend dem Oberbegriff des Anspruches 1 ist durch die US-A-1 690 181 bekannt. Bei dieser bekannten Ausführung sind der Elektromotor und die Zahnradpumpe in axialer Verlängerung des Hubzylinders angeordnet.A hydraulic lifting device according to the preamble of claim 1 is known from US-A-1 690 181. In this known embodiment, the electric motor and the gear pump are arranged in the axial extension of the lifting cylinder.

Der Erfindung liegt die Aufgabe zugrunde, eine hydraulische Hubvorrichtung entsprechend dem Oberbegriff des Anspruches 1 so auszubilden, daß sich eine besonders kompakte Bauweise ergibt.The invention has for its object to design a hydraulic lifting device according to the preamble of claim 1 so that there is a particularly compact design.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.This object is achieved by the characterizing features of claim 1.

Eine zweckmäßige Ausgestaltung der Erfindung ist Gegenstand des Anspruches 2.An expedient embodiment of the invention is the subject of claim 2.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung veranschaulicht. Es zeigen

  • Fig.1 einen Schnitt durch eine Ausführungsform der erfindungsgemäßen hydraulischen Hubvorrichtung,
  • Fig. 2 einen schematischen Grundriß der Hubvorrichtung gemäß Fig. 1,
  • Fig. einen Vertikalschnitt längs der Linie A-B-C-D gemäß Fig. 2,
  • Fig. 4 einen Schnitt mit einem Rücklaufventil,
  • Fig. 5 eine schematische Perspektivansicht der Ausführung gemäß den Fig.1 bis 4.
An embodiment of the invention is illustrated in the drawing. Show it
  • 1 shows a section through an embodiment of the hydraulic lifting device according to the invention,
  • 2 shows a schematic plan view of the lifting device according to FIG. 1,
  • FIG. 2 shows a vertical section along the line ABCD according to FIG. 2,
  • 4 shows a section with a return valve,
  • 5 shows a schematic perspective view of the embodiment according to FIGS. 1 to 4.

Die in der Zeichnung dargestellte hydraulische Hubvorrichtung enthält in einem Gehäusekörper 1 einen Elektromotor 2, eine aus zwei miteinander kämmenden Ritzeln bestehende Zahnradpumpe 3 und einen Hubzylinder 10' mit einem darin gleitbeweglich angeordneten Kolben 11'.The hydraulic lifting device shown in the drawing contains, in a housing body 1, an electric motor 2, a gear pump 3 consisting of two meshing pinions and a lifting cylinder 10 'with a piston 11' slidably disposed therein.

Der Gehäusekörper 1 enthält außer der Druckkammer 12' des Hubzylinders 10' eine zur Aufnahme des Elektromotors 2 und der Zahnradpumpe 3 dienende Kammer 27 sowie zwei Nebenkammern 30, 31 (vgl. Fig.2).In addition to the pressure chamber 12 'of the lifting cylinder 10', the housing body 1 contains a chamber 27 for receiving the electric motor 2 and the gear pump 3 and two secondary chambers 30, 31 (cf. FIG. 2).

Der Hubzylinder 10', die Kammer 27 und die Nebenkammern 30, 31 sind achsparallel angeordnet (vgl. Fig.2 und 3).The lifting cylinder 10 ', the chamber 27 and the secondary chambers 30, 31 are arranged axially parallel (see. Fig. 2 and 3).

Der Elektromotor 2 und die Zahnradpumpe 3 sind durch eine Querwand 28 voneinander getrennt, wobei der die Zahnradpumpe 3 aufnehmende untere Teil der Kammer 27 mit den beiden Nebenkammern 30, 31 über Öffnungen 34, 37 verbunden ist und zusammen mit diesen beiden Nebenkammern 30, 31 einen Vorratsraum für die Druckflüssigkeit bildet.The electric motor 2 and the gear pump 3 are separated from one another by a transverse wall 28, the lower part of the chamber 27 receiving the gear pump 3 being connected to the two secondary chambers 30, 31 via openings 34, 37 and together with these two secondary chambers 30, 31 Storage space for the hydraulic fluid forms.

Der obere Bereich der Druckkammer 12' bzw. des Hubzylinders 10' steht über eine Öffnung 36 mit der Nebenkammer 30 in Verbindung, deren unterer Bereich über die genannte Öffnung 37 an die die Zahnradpumpe 3 aufnehmende Kammer 27 angeschlossen ist.The upper region of the pressure chamber 12 'or of the lifting cylinder 10' is connected via an opening 36 to the secondary chamber 30, the lower region of which is connected via the above-mentioned opening 37 to the chamber 27 receiving the gear pump 3.

Der Elektromotor 2 ist ein Gleichstrommotor mit einer Betriebsspannung von 12 V, so daß als Energiequelle für die hydraulische Hubvorrichtung eine Fahrzeugbatterie verwendet werden kann.The electric motor 2 is a DC motor with an operating voltage of 12 V, so that a vehicle battery can be used as an energy source for the hydraulic lifting device.

Die Welle 5 des Elektromotors 2 ist über eine Kupplung mit der Welle 6 der Zahnradpumpe 3 verbunden.The shaft 5 of the electric motor 2 is connected to the shaft 6 of the gear pump 3 via a coupling.

Am Umfang der Querwand 28 ist eine Ringdichtung 29 vorgesehen. Eine Dichtung 24 befindet sich ferner am Umfang des Kolbens 11', dessen Kolbenstange 13' durch den Deckel 32 des Gehäusekörpers 1 hindurchgeführt ist und einen Auflagekopf 19 für das anzuhebende Objekt trägt. ,An annular seal 29 is provided on the circumference of the transverse wall 28. A seal 24 is also located on the circumference of the piston 11 ', the piston rod 13' of which is guided through the cover 32 of the housing body 1 and carries a support head 19 for the object to be lifted. ,

Zwischen der Zahnradpumpe 3 und der Druckkammer 12' ist ein Einwegventil in einem Kollektor 35 angeordnet, von dem einerseits eine Verbindungsleitung 23' zur Druckkanmer 12' führt und von dem andererseits eine Rücklaufleitung 39 zu der die Zahnradpumpe 3 aufnehmenden Kammer 27 führt. In dieser Rücklaufleitung 39 ist ein von Hand betätigbares Rücklaufventil 38 angeordnet. Die von der Zahnradpumpe 3 zum Kollektor 35 führende Leitung ist mit 40 bezeichnet.A one-way valve is arranged in a collector 35 between the gear pump 3 and the pressure chamber 12 ', from which on the one hand a connecting line 23' leads to the pressure chamber 12 'and from which on the other hand a return line 39 leads to the chamber 27 receiving the gear pump 3. In this return line 39, a manually operated return valve 38 is arranged. The line leading from the gear pump 3 to the collector 35 is labeled 40.

Die Funktion der hydraulischen Hubvorrichtung ist folgendermaßen:

  • Soll der Kolben 11' im Hubzylinder 10' angehoben werden, so wird der Elektromotor 2 eingeschaltet. Die Zahnradpumpe 3 fördert infolgedessen ÖI aus der Kammer 27 und aus den Nebenkammern 30, 31 über die Leitung 40, den Kollektor 35 und die Verbindungsleitung 23' in die Druckkammer 12' des Hubzylinders 10', wodurch der Kolben 11' nach oben gedrückt wird. Die oberste Hubstellung des Kolbens 11' wird durch die im oberen Bereich des Hubyzlinders 10' vorgesehene Öffnung 36 bestimmt. Wird diese Öffnung 36 vom Kolben 11' überfahren, so läßt sie das Drucköl aus der Druckkammer 12' in die Nebenkammer 30 abfließen. Von hier gelangt das Öl über die Öffnung 37 wieder in die Kammer 27.
The function of the hydraulic lifting device is as follows:
  • If the piston 11 'in the lifting cylinder 10' is to be raised, the electric motor 2 is switched on. As a result, the gear pump 3 delivers oil from the chamber 27 and from the secondary chambers 30, 31 via the line 40, the collector 35 and the connecting line 23 'into the pressure chamber 12' of the lifting cylinder 10 ', whereby the piston 11' is pushed upwards. The uppermost stroke position of the piston 11 'is determined by the opening 36 provided in the upper region of the stroke cylinder 10'. If this opening 36 is run over by the piston 11 ', it allows the pressure oil to flow out of the pressure chamber 12' into the secondary chamber 30. From here, the oil returns to the chamber 27 via the opening 37.

Will man den Kolben 11' absenken, so wird das Rücklaufventil 38 von Hand betätigt. Hierdurch wird eine Verbindung zwischen dem Kollektor 35 und der Rücklaufleitung 39 hergestellt, so daß Öl aus der Druckkammer 12' über die Verbindungsleitung 23' zurück in die Kammer 27 strömen kann. Der Kolben 11' sinkt hierdurch ab.If you want to lower the piston 11 ', the return valve 38 is operated by hand. This creates a connection between the collector 35 and the return line 39, so that oil from the pressure chamber 12 'can flow back into the chamber 27 via the connecting line 23'. As a result, the piston 11 'drops.

Claims (2)

1. Hydraulic lifting device containing
a) a lifting cylinder (10') with a piston (11') arranged so as to be slidably movable therein,
b) a storage chamber (27, 30, 31) for hydraulic fluid,
c) a geared pump (3) consisting of two mating pinions to convey the hydraulic fluid in the storage chamber (27, 30, 31) to a pressure chamber (12') of the lifting cylinder (10') defined by the piston (11'),
d) an electric motor (2) for driving the geared pump (3) which is coupled directly to this motor, characterised by the following features:
e) the pressure chamber (12') of the lifting cylinder (10') is moulded into a housing body (1) in which a chamber (27) serving to accommodate the electric motor (2) and the geared pump (3) and two auxiliary chambers (30, 31) are arranged with parallel axes;
f) the electric motor (2) and the geared pump (3) are separated from each other by a partition (28), and the lower part of the chamber (27) which accommodates the geared pump (3) is connected via openings (34, 37) to the two auxiliary chambers (30, 31) and together with these two auxiliary chambers forms the storage chamber for the hydraulic fluid;
g) the upper region of the pressure chamber (12') is connected via an opening (36) to one of the auxiliary chambers, the lower region of which is connected to the chamber (27) which accommodates the geared pump (3).
2. Hydraulic lifting device as claimed in claim 1, characterised in that between the geared pump (3) and the pressure chamber (12') a one-way valve is arranged in a collector (35) and from it a return pipe (39) leads to the chamber (27) which accommodates the geared pump (3), and a manually operated return valve (38) is arranged in this return pipe (39).
EP83102029A 1982-03-02 1983-03-02 Hydraulic lifting device Expired EP0087816B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83102029T ATE24875T1 (en) 1982-03-02 1983-03-02 HYDRAULIC LIFTING DEVICE.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ES263602U 1982-03-02
ES1982263602U ES263602Y (en) 1982-03-02 1982-03-02 ELECTRIC HYDRAULIC JACK.
ES270376U 1983-02-16
ES1983270376U ES270376Y (en) 1983-02-16 1983-02-16 NEW ELECTRIC HYDRAULIC JACK.

Publications (2)

Publication Number Publication Date
EP0087816A1 EP0087816A1 (en) 1983-09-07
EP0087816B1 true EP0087816B1 (en) 1987-01-14

Family

ID=26155503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102029A Expired EP0087816B1 (en) 1982-03-02 1983-03-02 Hydraulic lifting device

Country Status (6)

Country Link
US (1) US4667932A (en)
EP (1) EP0087816B1 (en)
BR (1) BR8300997A (en)
CA (1) CA1202614A (en)
DE (1) DE3369109D1 (en)
MX (1) MX152865A (en)

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FR2743047B1 (en) * 1995-12-27 1998-02-20 Renault Vehicules Ind DEVICE FOR TILTING A CAB SUPPORTED BY A CHASSIS
DE10106714A1 (en) * 2001-02-14 2002-08-22 Bosch Gmbh Robert lifting cylinder
US6719099B2 (en) 2002-05-13 2004-04-13 Inventio Ag Integral elevator hydraulic power unit
ITRM20030007A1 (en) * 2003-01-10 2004-07-11 Otis Elevator Co PISTON LIFTING DEVICE, IN PARTICULAR
DE202005005598U1 (en) * 2005-04-08 2005-06-09 Atrium Enterprises Gmbh Jacking unit for especially motor vehicles has pump unit with drive motor in rotational communication with swashplate connected to pump push rod
US20090045380A1 (en) * 2007-08-13 2009-02-19 Mark Aiken Lift stand
US9073516B2 (en) * 2009-01-22 2015-07-07 Lippert Components Manufacturing Inc. Leveling jack for vehicle
EP2343223B1 (en) * 2010-01-06 2016-05-04 Lippert Components Manufacturing, Inc. Leveling jack for vehicle
US8840164B2 (en) 2011-10-26 2014-09-23 Lippert Components Manufacturing, Inc. Slide-out room system having wall-mounted drive mechanisms
US8991890B2 (en) 2011-10-26 2015-03-31 Lippert Components Manufacturing, Inc. Slide-out room system having wall-mounted drive mechanisms
CN103072920A (en) * 2013-01-05 2013-05-01 常熟通润汽车零部件股份有限公司 Oil pressure elevation device for carrying and transporting vehicle parts
US10336584B2 (en) 2015-02-24 2019-07-02 Larry R. DeBattiste Lifting and transporting system
CN109437040A (en) * 2018-12-27 2019-03-08 宁波市奉化区南方机械制造有限公司 A kind of gear-type hydraulic jack
CN109775603A (en) * 2019-03-25 2019-05-21 南通科技职业学院 Portable vehicle hydraulic jack
CN113148892A (en) * 2021-05-13 2021-07-23 上海航空机械有限公司 Electric hydraulic jack and synchronous lifting control system

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US1353244A (en) * 1917-06-18 1920-09-21 Cora A Joerns Hydraulic hoist
US1546997A (en) * 1924-04-26 1925-07-21 William A Reschke Motor-driven portable oil-transfer pump
US1690181A (en) * 1924-05-12 1928-11-06 American Hoist & Derrick Co Hydraulic hoist
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US2034605A (en) * 1935-05-13 1936-03-17 Carman Clifford Hydraulic jack
US2293071A (en) * 1940-08-03 1942-08-18 Jr Otto Morgensen Multiple ram hydraulic jack
US2333530A (en) * 1942-04-25 1943-11-02 Hydraulic Dev Corp Inc Hydraulic system
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FR920424A (en) * 1945-10-01 1947-04-08 Hydro-electric cylinder
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US2485240A (en) * 1946-06-10 1949-10-18 Carlton L Jackson Reversible variable-speed rotary pump and motor hydraulic transmission
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Also Published As

Publication number Publication date
EP0087816A1 (en) 1983-09-07
BR8300997A (en) 1983-11-16
MX152865A (en) 1986-06-23
DE3369109D1 (en) 1987-02-19
CA1202614A (en) 1986-04-01
US4667932A (en) 1987-05-26

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