EP0155592B1 - Fluid pump - Google Patents

Fluid pump Download PDF

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Publication number
EP0155592B1
EP0155592B1 EP19850102519 EP85102519A EP0155592B1 EP 0155592 B1 EP0155592 B1 EP 0155592B1 EP 19850102519 EP19850102519 EP 19850102519 EP 85102519 A EP85102519 A EP 85102519A EP 0155592 B1 EP0155592 B1 EP 0155592B1
Authority
EP
European Patent Office
Prior art keywords
fluid
pump
pump head
valve
duct
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
EP19850102519
Other languages
German (de)
French (fr)
Other versions
EP0155592A1 (en
Inventor
Gisela Weber
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.)
Bucher GmbH Maschinenfabrik
Original Assignee
Bucher GmbH Maschinenfabrik
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Filing date
Publication date
Application filed by Bucher GmbH Maschinenfabrik filed Critical Bucher GmbH Maschinenfabrik
Publication of EP0155592A1 publication Critical patent/EP0155592A1/en
Application granted granted Critical
Publication of EP0155592B1 publication Critical patent/EP0155592B1/en
Expired legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00Pumping installations or systems
    • F04B23/04Combinations of two or more pumps
    • F04B23/06Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/14Pumps characterised by muscle-power operation

Description

Die Erfindung bezieht sich auf ein Notaggregat für Fluidpumpen, insbesondere für im Fahrzeugbau verwendbare Kompakt-Fluidpumpen.The invention relates to an emergency unit for fluid pumps, in particular for compact fluid pumps that can be used in vehicle construction.

Im Kraftfahrzeugbau werden Fahrzeuge vielfach mit Ladebordwänden, Hebebühnen und dgl. Einrichtungen ausgestattet, die in der Regel hydraulisch angetrieben werden, wobei die Hydraulikpumpe über die Fahrzeugbatterie betätigt wird. Probleme treten auf, wenn der Pumpenantrieb ausfällt, weil dann die fluidbetätigte Einrichtung, z. B. die Ladebordwand, nicht mehr angehoben werden kann, was zu kostenaufwendigen Verzögerungen führt.In motor vehicle construction, vehicles are often equipped with tail lifts, lifting platforms and the like. Devices which are generally driven hydraulically, the hydraulic pump being actuated by the vehicle battery. Problems arise when the pump drive fails because the fluid operated device, e.g. B. the tail lift can no longer be raised, which leads to costly delays.

Die Erfindung zielt darauf ab, eine Fluidpumpe zu schaffen, die bei geringem konstruktivem Aufwand und kompaktem Aufbau eine Notbetätigung der Fluidpumpe von Hand ermöglicht.The invention aims to provide a fluid pump that enables manual actuation of the fluid pump with little design effort and compact structure.

Gegenstand der Erfindung ist eine Fluidpumpe, insbesondere Hydraulikpumpe, mit einem Pumpenkopf, in dem ein Verbraucheranschluss, ein mit diesem in Verbindung stehender Druckfluidkanal, in welchen ein Rückschlagventil und gegebenenfalls ein Sicherheitsventil eingeschaltet sind, und ein Fluidablasskanal mit einem Fluidablassventil vorgesehen sind; diese Fluidpumpe zeichnet sich erfindungsgemäss dadurch aus, dass im Pumpenkopf ferner ein mit einem Fluid-Vorratsbehälter in Verbindung stehender Ansaugkanal ausgebildet ist, der im Pumpenkopf einerseits mit einem einen handbetätigten Kolben enthaltenden Zylinderraum und anderseits über ein Rückschlagventil mit dem Druckfluidkanal sowie dem Fluidablassventil in Verbindung steht.The invention relates to a fluid pump, in particular a hydraulic pump, with a pump head, in which a consumer connection, a pressure fluid channel connected to it, in which a check valve and possibly a safety valve are switched on, and a fluid drain channel with a fluid drain valve are provided; According to the invention, this fluid pump is characterized in that a suction channel connected to a fluid reservoir is also formed in the pump head, which is connected in the pump head on the one hand to a cylinder chamber containing a manually operated piston and on the other hand via a check valve to the pressure fluid channel and the fluid drain valve .

Gemäss einer bevorzugten Ausführungsform der Erfindung ist der Betätigungskolben zur Handbetätigung mit einem an der Aussenseite des Pumpenkopfes gelagerten Handhebel gekuppelt.According to a preferred embodiment of the invention, the actuating piston for manual actuation is coupled to a hand lever mounted on the outside of the pump head.

Nach einem weiteren Merkmal der Erfindung liegen der Betätigungskolben und das zugeordnete Rückschlagventil dem Rückschlagventil und dem Ablassventil sowie dem Verbraucheranschluss bezüglich der eine Pumpenwellenantriebsbohrung enthaltenden Pumpenkopfachse im wesentlichen gegenüber.According to a further feature of the invention, the actuating piston and the associated check valve lie essentially opposite the check valve and the drain valve and the consumer connection with respect to the pump head axis containing a pump shaft drive bore.

Auf diese Weise wird mit geringem Raumaufwand in den Pumpenkopf eine Notbetätigungsvorrichtung integriert, die es ermöglicht, im Bedarfsfall das Fluid aus dem Fluidbehälter zum Verbraucher zu fördern, wobei die Notbetätigungsvorrichtung dabei mit der normalen Ablassleitung und dem zugeordneten Ablassventil im Pumpenkopf in Verbindung steht.In this way, an emergency actuation device is integrated into the pump head with a small amount of space, which makes it possible, if necessary, to convey the fluid from the fluid container to the consumer, the emergency actuation device being connected to the normal drain line and the associated drain valve in the pump head.

Die Erfindung eignet sich speziell für sogenannte Kompaktgeräte, die als Antriebspumpen für Hebebühnen und Ladebordwände von Kraftfahrzeugen, für Gabelstapler, Scherenhubtische, Koppfahrzeuge, Klein-Aufzüge, u.s.w. Anwendung finden und geringen Raumbedarf sowie geringes Gewicht haben sollen.The invention is particularly suitable for so-called compact devices, which are used as drive pumps for car lifts and tail lifts of motor vehicles, for forklifts, scissor lift tables, head vehicles, small elevators, etc. Find application and should have low space requirements and low weight.

Die Erfindung wird nachfolgend an einem Ausführungsbeispiel unter Bezugnahme auf die Zeichnung näher erläutert, in der ein Querschnitt durch den Kopf einer Hydraulikpumpe gemäss der Erfindung dargestellt ist.The invention is explained in more detail below using an exemplary embodiment with reference to the drawing, in which a cross section through the head of a hydraulic pump according to the invention is shown.

Der gezeigte Pumpenkopf 1 ist mittels eines Flansches 2 an einem nicht gezeigten Vorratsbehälter für das Hydrauliköl befestigbar. Der Pumpenkopf 1 weist eine zentrale Bohrung 3 für die Aufnahme der Antriebswelle einer z. B. als Innenzahnradpumpe ausgebildeter Pumpe (nicht gezeigt) auf. Neben der zentralen Bohrung 3 mündet in den Pumpenkopf eine achsparallele Druckölbohrung 4, die über einen vertikalen Kanal 5 mit einem im oberen Teil des Pumpenkopfes ausgebildeten Drucköl-Querkanal 6 in Verbindung steht. In diesem Querkanal 6 ist an einem Ende desselben ein Rückschlagventil 7 angeordnet und am gegenüberliegenden Ende desselben ein sowohl elektromagnetisch als auch handbetätigbares Ablassventil 8 mit dem Ablasskanal 8'. Zwischen diesen beiden Ventilen geht vom Querkanal 6 ein Verbraucheranschluss 9 ab und parallel dazu, im Bereich des Rückschlagventiles 7 ein Anschluss 10 für ein Sicherheitsventil (nicht gezeigt).The pump head 1 shown can be fastened by means of a flange 2 to a reservoir for the hydraulic oil, not shown. The pump head 1 has a central bore 3 for receiving the drive shaft of a z. B. trained as an internal gear pump (not shown). In addition to the central bore 3, an axially parallel pressure oil bore 4 opens into the pump head, which is connected via a vertical channel 5 to a pressure oil cross channel 6 formed in the upper part of the pump head. A check valve 7 is arranged in this transverse channel 6 at one end thereof and a discharge valve 8 with the discharge channel 8 ′, which can be actuated both electromagnetically and manually, is arranged at the opposite end thereof. Between these two valves, a consumer connection 9 extends from the transverse channel 6 and, parallel to this, a connection 10 for a safety valve (not shown) in the area of the check valve 7.

Parallel zum Querkanal 6 ist in der unteren Pumpenkopfhälfte ein querliegender Zylinder 11 für einen Kolben 12 vorgesehen, dessen aus dem Pumpenkopf 1 herausragendes freies Ende mit einem am Pumpenkopf schwenkbar gelagerter Betätigungshandhebel 13 gekuppelt ist. Die Stirnseite des Zylinders 11 steht über einen Querkanal 14 mit einer achsparallelen Bohrung 15 in Verbindung, die an den Vorrat für Hydrauliköl angeschlossen ist. Der Querkanal 14 steht ausserdem über einem Rückschlagventil 16 und einem Kanal 17 mit dem oberen Querkanal 6 in Verbindung.Parallel to the transverse channel 6, a transverse cylinder 11 for a piston 12 is provided in the lower half of the pump head, the free end of which protrudes from the pump head 1 is coupled to an actuating hand lever 13 pivotably mounted on the pump head. The end face of the cylinder 11 is connected via a transverse channel 14 to an axially parallel bore 15, which is connected to the supply of hydraulic oil. The transverse channel 14 is also connected to the upper transverse channel 6 via a check valve 16 and a channel 17.

Fällt der normale Pumpenantrieb oder die Pumpe aus irgendeinem Grund aus, so kann der Verbraucher mit Hilfe des Handhebels 13 gespeist werden. Das Hydrauliköl wird mittels des Kolbens 12 über die Bohrung 14 aus dem Ölvorratsbehälter angesaugt und über das Ventil 16 und die Kanäle 17 und 6 zum Verbraucher gedrückt. Soll das Hydrauliköl vom Verbraucher abgelassen werden, so wird wie im Normalfall das Ablassventil 8 elektrisch oder von Hand aus betätigt.If the normal pump drive or the pump fails for any reason, the consumer can be fed using the hand lever 13. The hydraulic oil is sucked out of the oil reservoir via the bore 14 by means of the piston 12 and pressed to the consumer via the valve 16 and the channels 17 and 6. If the hydraulic oil is to be drained by the consumer, the drain valve 8 is actuated electrically or by hand, as is normally the case.

Es versteht sich, dass die Erfindung nicht auf das dargestellte Ausführungsbeispiel beschränkt ist, dieses vielmehr im Rahmen des Erfindungsgedankens abgewandelt werden kann. So ist die Erfindung nicht auf die Verwendung eines hydraulischen Mediums beschränkt, sondern kann auch mit einem pneumatischen Medium angewendet werden. Ferner kann die Erfindung in Verbindung mit verschiedenartigen Pumpenkonstruktionen verwirklicht werden. Auch kann die Anordnung der einzelnen Ventile und des handbetätigbaren Kolbens von der dargestellten abweichen; wesentlich ist, dass der handbetätigbare Kolben und das diesem nachgeschaltete Rückschlagventil bzw. der gesamt Notbetätigungskreise im Pumpenkopf gemeinsam mit dem normalen Speisekreis und insbesondere mit dem Medium-Ablassventil integriert ist, das sowohl im Normalbetrieb als auch im Notbetrieb in gleicher Weise betätigt werden kann.It goes without saying that the invention is not limited to the exemplary embodiment shown, but that it can be modified within the scope of the inventive concept. Thus, the invention is not limited to the use of a hydraulic medium, but can also be used with a pneumatic medium. Furthermore, the invention can be implemented in connection with various types of pump constructions. The arrangement of the individual valves and the manually operable piston can also differ from that shown; it is essential that the Manually operated pistons and the check valve connected downstream of this or the entire emergency actuation circuits in the pump head are integrated together with the normal feed circuit and in particular with the medium drain valve, which can be actuated in the same way both in normal operation and in emergency operation.

Claims (3)

1. A fluid pump, particularly a hydraulic pump, having a pump head provided with a connection for a consumer device, a pressure-fluid duct in communication therewith and in which are inserted a non-return valve and possibly a safety valve, and a fluid outlet duct with a fluid outlet valve, characterised in that there is also formed in the pump head (1) an intake duct (15) which is in communication with a fluid supply tank and, in the pump head (1), on the one hand with a cylinder compartment (11) containing a manually actuated piston (12) and on the other hand, through a non-return valve (16), with the pressure fluid duct (6) and the fluid outlet valve (8).
2. A fluid pump as claimed in Claim 1, characterised in that the manually actuated piston (12) is coupled to a hand lever (13) mounted outside of the pump head (1).
3. A fluid pump as claimed in Claim 1 or 2, characterised in that the manually actuated piston (12) and the associated non-return valve (16) are situated, with respect to the pump head axis along a pump drive-shaft bore (3), substantially opposite the pressure-fluid non-return valve (7) and the fluid outlet valve (8), as well as the connection (9) of the normal feed circuit for the consumer device.
EP19850102519 1984-03-08 1985-03-06 Fluid pump Expired EP0155592B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT78284A AT378580B (en) 1984-03-08 1984-03-08 FLUID PUMP
AT782/84 1984-03-08

Publications (2)

Publication Number Publication Date
EP0155592A1 EP0155592A1 (en) 1985-09-25
EP0155592B1 true EP0155592B1 (en) 1987-07-22

Family

ID=3499616

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850102519 Expired EP0155592B1 (en) 1984-03-08 1985-03-06 Fluid pump

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EP (1) EP0155592B1 (en)
AT (1) AT378580B (en)
DE (1) DE3560372D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399130B (en) * 1992-03-18 1995-03-27 Hoerbiger Fluidtechnik Gmbh ARRANGEMENT FOR HYDRAULICALLY OPERATING A VEHICLE TOP
CN105526052A (en) * 2015-12-09 2016-04-27 沈阳飞研航空设备有限公司 High pressure manual pump

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB298176A (en) * 1927-07-01 1928-10-01 Charles Edward Holliday Improvements in and relating to pumping devices
US2106236A (en) * 1933-08-30 1938-01-25 Burke Byron Ray Compressor
FR762643A (en) * 1933-10-20 1934-04-14 Bosch Robert Feed pump with hand pump
US2189675A (en) * 1936-10-19 1940-02-06 Arthur L Parker Fuel distributing device
US2290829A (en) * 1939-09-29 1942-07-21 Timken Roller Bearing Co Fuel pump
FR1259586A (en) * 1960-03-19 1961-04-28 Prec Mecanique Labinal Improvements made to piston and cylinder pumps, in particular for fuel injection into engines

Also Published As

Publication number Publication date
EP0155592A1 (en) 1985-09-25
AT378580B (en) 1985-08-26
DE3560372D1 (en) 1987-08-27
ATA78284A (en) 1985-01-15

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