EP1794452B1 - Reciprocating pump for delivering fluids - Google Patents

Reciprocating pump for delivering fluids Download PDF

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Publication number
EP1794452B1
EP1794452B1 EP05763076A EP05763076A EP1794452B1 EP 1794452 B1 EP1794452 B1 EP 1794452B1 EP 05763076 A EP05763076 A EP 05763076A EP 05763076 A EP05763076 A EP 05763076A EP 1794452 B1 EP1794452 B1 EP 1794452B1
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EP
European Patent Office
Prior art keywords
piston
piston pump
seat
pump according
gearwheel
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.)
Not-in-force
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EP05763076A
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German (de)
French (fr)
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EP1794452A1 (en
Inventor
Peter Farr
Bertram Bauer
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP1794452A1 publication Critical patent/EP1794452A1/en
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    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/01—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical

Definitions

  • the present invention relates to a piston pump for delivering fluids, and more particularly relates to a piston pump for conveying air used in a seat system for a vehicle to fill seat cushions with air or suck air from the seat cushions and deflate the seat cushions.
  • the present invention relates to a seating system with an integrated piston pump.
  • a pumping device has become known in which an engine body drives a crank element of a single piston via a gear transmission.
  • the GB 103 266 discloses a pump in which a drive wheel via a connecting rod drives a rack which is connected via a spindle with a piston of a cylinder.
  • a vehicle seat having air-tight, resilient cushions that are inflatable by a pump.
  • the disadvantage of this design is that such pumps have a large polarization and cause disturbing noises to produce a sufficient volume flow.
  • the piston pump according to the invention for conveying fluids with the features of claim 1 has the advantage that it is very compact and allows a particularly low-noise promotion of fluids.
  • a piston pump according to the invention can be used in particular in seats of vehicles, since it is physically small and works noiselessly even at high speeds.
  • a transmission is arranged between an output shaft and the gear, on which the crank mechanism is arranged, in order to enable a transmission or reduction of the output speed of the drive.
  • the transmission is designed as a single intermediate gear, which is arranged between the output shaft with worm toothing and the gear of the crank mechanism.
  • the intermediate gear on a helical toothed portion and an end-toothed portion. The helical and the end-toothed area are arranged adjacent to each other on an outer periphery.
  • a plurality of piston elements is provided, which are arranged in series. Due to the arrangement of the piston elements in series, a particularly flat design of the piston pump according to the invention can be realized, since the thickness of the piston pump only depends on the piston diameter or cylinder diameter.
  • the crank mechanism of the piston elements according to the invention does not increase the required space in contrast to the known crankshaft, since the crank mechanism according to the invention is attached to the gear.
  • a first gear of a first piston element drives a second gear of a second, adjacent piston element. If more than two piston elements are provided, preferably the gear of the second piston element drives the adjacent gear of the third piston element, etc.
  • piston elements are preferably arranged, wherein the crank mechanisms of the piston elements are arranged offset to the gears at positions of 90 ° to each other.
  • valves of the piston pump are arranged in a cover region of the cylinder.
  • the drive of the piston pump is an electric motor.
  • the present invention relates to a seat system for a vehicle comprising a piston pump according to the invention.
  • the piston pump serves to convey a fluid, in particular to convey air, in order to fill or empty one or more seat cushion regions of the vehicle seat. Since the piston pump is very compact, it can be integrated directly into the driver's seat in the vehicle interior. Since the piston pump according to the invention has virtually no noise emissions, no disturbing noises are caused by the piston pump during operation.
  • the seat cushion areas of the vehicle seat are filled or emptied depending on transverse accelerations acting on the vehicle.
  • an improved lateral support in the seat can be obtained, for example, when cornering through corresponding filling of lateral seat cushion areas. which support the person on it.
  • a massage function can be performed by constantly filling or emptying the seat cushion.
  • FIGS. 1 to 4 a piston pump 1 according to an embodiment of the present invention described.
  • the piston pump according to the invention comprises four pistons 2, which are arranged in series.
  • Each piston 2 comprises a crank mechanism 3, consisting of a rod 3a, a first bolt 3b and a second bolt 3c.
  • the rod 3a is fixed in the piston 2 in a known manner.
  • the second pin 3c serves to fix the rod 3a to a gear 4.
  • the gear 4 comprises a first end-toothed wheel 4a and a second end-toothed wheel 4b, which are arranged parallel to each other on a respective lateral pin 8.
  • the crank mechanism 3 of the piston is thus arranged in each case between the first and the second wheel 4a and 4b and fastened by means of the second bolt 3c.
  • the piston pump 1 comprises a motor 9, which drives an output shaft 5 of the motor.
  • a worm gear 6 is arranged on the output shaft 5, a worm gear 6 is arranged.
  • the worm gear 6 is engaged with an intermediate gear 7 in engagement.
  • the intermediate gear 7 is arranged as a transmission between the worm gear 6 of the output shaft 5 and the gears 4 of the piston.
  • the intermediate gear 7 comprises a first end toothing 7a, a second end toothing 7b and a worm toothing 7c.
  • the worm gear 7c is arranged in the middle between the two spur gears 7a and 7b.
  • the Worm gear 7c is engaged with the worm gear 6 of the output shaft 5.
  • the spur gears 7a and 7b of the intermediate gear are respectively engaged with the spur gears 4a and 4b, as in FIG FIG. 1 shown.
  • the pistons 2 are each arranged adjacent to each other in series. It drives in the series first gear 4, which is driven by the intermediate gear 7, the adjacent next gear 4 of the next piston 2, which in turn drives again the next adjacent gear, etc.
  • the pistons 2 are fixed to the gear 4 so that they are each offset by 90 ° to each other. This measure makes it possible to minimize pulsation of the delivery flow. Furthermore, the piston pump according to the invention can thereby be operated with a greater smoothness.
  • FIG. 3 schematically shows the cylinder housing which receives the piston 2 and which is covered with a cylinder cover 11.
  • valves 12 are arranged on the front side, so that a particularly space-saving design is possible.
  • the valves 12 are preferably designed as check valves to allow easy control of the pump.
  • a gear housing of the intermediate gear 7 is designated by the reference numeral 14. How farther FIG. 3 it can be seen, a side plate 13 is provided, on which the gears 4 are rotatably supported by means of the pins 8.
  • crank mechanism 3 on the gear 4 a particularly compact and flat structure can be realized. Furthermore, by using the worm gear between the worm gear 6 and the intermediate gear 7, a noiseless operation of the piston pump 1 can be realized.
  • the use of the worm drive makes it possible to produce a reduction of the rotational speed of the output shaft 5 on the intermediate gear 7, without additional transmission elements are necessary.
  • the crank mechanisms 3 of the pistons 2 are then transmitted via the identically designed gears 4.
  • the thickness of the piston pump 1 depends essentially on the diameter of the piston 2 and the cylinder.
  • the sequential arrangement of the crank drives allows a particularly flat design of a multi-cylinder pump or a multi-cylinder compressor.
  • the use of the worm drive further allows a construction with a high reduction ratio while minimizing the number of components and particularly quiet running.

Abstract

The invention relates to a reciprocating pump for delivering fluids, which comprises at least one piston element (2) which is mobile inside a cylinder (10), and a drive (9) driving a driving shaft (5). The pump is characterized in that the driving shaft (5) is provided with a worm gear (6) which drives a toothed wheel (4) and the piston element (2) is fastened on the toothed wheel (4) by means of a crank drive (3).

Description

Stand der TechnikState of the art

Die vorliegende Erfindung betrifft eine Kolbenpumpe zur Förderung von Fluiden und betrifft insbesondere eine Kolbenpumpe zur Förderung von Luft, welche in einem Sitzsystem für ein Fahrzeug verwendet wird, um Sitzpolster mit Luft zu befüllen bzw. Luft aus den Sitzpolstern anzusaugen und die Sitzpolster zu entleeren.The present invention relates to a piston pump for delivering fluids, and more particularly relates to a piston pump for conveying air used in a seat system for a vehicle to fill seat cushions with air or suck air from the seat cushions and deflate the seat cushions.

Ferner betrifft die vorliegende Erfindung ein Sitzsystem mit einer integrierten Kolbenpumpe.Furthermore, the present invention relates to a seating system with an integrated piston pump.

Arbeitsmaschinen zur Förderung von Fluiden sind im Stand der Technik in unterschiedlichen Ausgestaltungen bekannt. Beispielsweise werden hierzu Kolbenpumpen, Flügelzellenpumpen, Schraubenverdichter, Rootskompressoren usw. verwendet. Diese bekannten Arbeitsmaschinen haben jedoch den Nachteil, dass sie im Betrieb relativ starke Geräusche erzeugen, insbesondere, wenn sie mit hohen Drehzahlen betrieben werden, um einen gewünschten Förderstrom sicherzustellen. Weiterhin werden in jüngster Zeit in Sitzen von Fahrzeugen verstärkt aufblasbare und entleerbare Sitzpolster verwendet, um eine Massagefunktion für eine auf dem Sitz befindliche Person bereitzustellen oder um in Abhängigkeit von auf das Fahrzeug wirkenden Querbeschleunigungen bei einer Kurvendurchfahrt o.ä. einen Sitzpolsterbereich zu befüllen oder zu entleeren. Insbesondere zur Befüllung und Entleerung von Sitzpolstern während einer Kurvendurchfahrt zur Verbesserung eines Seitenhalts der sich auf dem Sitz befindlichen Person ist es notwendig, die Sitzpolster schnell zu befüllen bzw. zu entleeren. Dabei müssen die bekannten Arbeitsmaschinen, welche in den Sitzen verwendet werden, mit hohen Drehzahlen betrieben werden, was zu unerwünschten Geräuschen im Betrieb führt. Da die Platzverhältnisse in den Fahrzeugsitzen relativ klein sind, müssen derartige Arbeitsmaschinen auch möglichst kleinbauend ausgelegt sein, sodass sie pro Hub bzw. Umdrehung nur ein relativ kleines Volumen fördern können. Zur Erzielung eines hohen Volumenstroms müssen die Arbeitsmaschinen somit mit noch höheren Drehzahlen betrieben werden, sodass sich die Geräuschproblematik weiter verschärft.Work machines for conveying fluids are known in the prior art in various configurations. For example, piston pumps, vane pumps, screw compressors, Roots compressors, etc. are used for this purpose. However, these known machines have the disadvantage that they generate relatively strong noises during operation, in particular when they are operated at high speeds to ensure a desired flow rate. Furthermore, in recent times in seats of vehicles increasingly inflatable and emptying seat pad used to a massage function to provide for a seated person or in order depending on acting on the vehicle lateral acceleration at a curve passage oa. to fill or empty a seat cushion area. In particular, for filling and emptying seat cushions during a curve passage to improve a lateral support of the person sitting on the seat, it is necessary to quickly fill the seat cushion or empty. The known machines that are used in the seats must be operated at high speeds, which leads to unwanted noise in operation. Since the space in the vehicle seats are relatively small, such machines must also be designed as small as possible, so they can promote only a relatively small volume per stroke or revolution. To achieve a high volume flow, the work machines must therefore be operated at even higher speeds, so that the noise problem further exacerbated.

Mit der DE 202 08 331 U ist ein Pumpgerät bekannt geworden, bei dem ein Motorkörper über ein Zahnradgetriebe ein Kurbelelement eines einzigen Kolbens antreibt. Die GB 103 266 offenbart eine Pumpe, bei der ein Antriebsrad über einen Pleuel eine Zahnstange antreibt, die über eine Spindel mit einem Kolben eines Zylinders verbunden ist. In der DE-A-42 11895 und der US-A-47 22 550 ist ein Fahrzeugsitz gezeigt, der luftdichte, elastische Kissen aufweist, die mittels einer Pumpe aufblasbar sind. Der Nachteil dieser Ausführung ist, dass solche Pumpen eine große Polarisation aufweisen und zur Erzeugung eines ausreichenden Volumenstroms störende Geräusche verursachen.With the DE 202 08 331 U a pumping device has become known in which an engine body drives a crank element of a single piston via a gear transmission. The GB 103 266 discloses a pump in which a drive wheel via a connecting rod drives a rack which is connected via a spindle with a piston of a cylinder. In the DE-A-42 11895 and the US-A-47 22 550 For example, there is shown a vehicle seat having air-tight, resilient cushions that are inflatable by a pump. The disadvantage of this design is that such pumps have a large polarization and cause disturbing noises to produce a sufficient volume flow.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Kolbenpumpe zur Förderung von Fluiden mit den Merkmalen des Patentanspruchs 1 weist demgegenüber den Vorteil auf, dass sie sehr kompakt aufgebaut ist und eine besonders geräuscharme Förderung von Fluiden ermöglicht. Eine erfindungsgemäße Kolbenpumpe kann insbesondere in Sitzen von Fahrzeugen verwendet werden, da sie kleinbauend ist und auch bei hohen Drehzahlen geräuschlos arbeitet.The piston pump according to the invention for conveying fluids with the features of claim 1 has the advantage that it is very compact and allows a particularly low-noise promotion of fluids. A piston pump according to the invention can be used in particular in seats of vehicles, since it is physically small and works noiselessly even at high speeds.

Die Unteransprüche zeigen bevorzugte Weiterbildungen der Erfindung.The dependent claims show preferred developments of the invention.

Vorzugsweise ist zwischen einer Abtriebswelle und dem Zahnrad, an welchem der Kurbeltrieb angeordnet ist, ein Getriebe angeordnet, um eine Übersetzung oder Untersetzung der Abtriebsdrehzahl des Antriebs zu ermöglichen. Besonders bevorzugt ist das Getriebe als ein einzelnes Zwischenzahnrad ausgebildet, welches zwischen der Abtriebswelle mit Schneckenverzahnung und dem Zahnrad des Kurbeltriebs angeordnet ist. Vorzugsweise weist das Zwischenzahnrad einen schneckenverzahnten Bereich und einen stirnverzahnten Bereich auf. Der schneckenverzahnte und der stirnverzahnte Bereich sind dabei an einem äußeren Umfang benachbart zueinander angeordnet.Preferably, a transmission is arranged between an output shaft and the gear, on which the crank mechanism is arranged, in order to enable a transmission or reduction of the output speed of the drive. Particularly preferably, the transmission is designed as a single intermediate gear, which is arranged between the output shaft with worm toothing and the gear of the crank mechanism. Preferably, the intermediate gear on a helical toothed portion and an end-toothed portion. The helical and the end-toothed area are arranged adjacent to each other on an outer periphery.

Um einen Förderstrom zu erhöhen, ist eine Vielzahl von Kolbenelementen vorgesehen, welche in Reihe angeordnet sind. Durch die Anordnung der Kolbenelemente in Reihe kann eine besonders flache Bauweise der erfindungsgemäßen Kolbenpumpe realisiert werden, da die Dicke der Kolbenpumpe nur noch vom Kolbendurchmesser bzw. Zylinderdurchmesser abhängt. Der erfindungsgemäße Kurbeltrieb der Kolbenelemente vergrößert den benötigten Bauraum im Gegensatz zu den bekannten Kurbelwellen nicht, da der erfindungsgemäße Kurbeltrieb am Zahnrad befestigt ist.In order to increase a flow rate, a plurality of piston elements is provided, which are arranged in series. Due to the arrangement of the piston elements in series, a particularly flat design of the piston pump according to the invention can be realized, since the thickness of the piston pump only depends on the piston diameter or cylinder diameter. The crank mechanism of the piston elements according to the invention does not increase the required space in contrast to the known crankshaft, since the crank mechanism according to the invention is attached to the gear.

Um eine besonders kompakte Bauweise zu erreichen, treibt vorzugsweise ein erstes Zahnrad eines ersten Kolbenelements ein zweites Zahnrad eines zweiten, benachbarten Kolbenelements an. Wenn mehr als zwei Kolbenelemente vorgesehen sind, treibt vorzugsweise das Zahnrad des zweiten Kolbenelements das benachbarte Zahnrad des dritten Kolbenelements usw. an.In order to achieve a particularly compact construction, preferably a first gear of a first piston element drives a second gear of a second, adjacent piston element. If more than two piston elements are provided, preferably the gear of the second piston element drives the adjacent gear of the third piston element, etc.

Um eine besonders kompakte, mit ausreichend großem Förderstrom arbeitende Kolbenpumpe bereitzustellen, sind vorzugsweise vier Kolbenelemente angeordnet, wobei die Kurbeltriebe der Kolbenelemente an den Zahnrädern an Positionen von jeweils 90° zueinander versetzt angeordnet sind.In order to provide a particularly compact, with sufficiently large flow rate working piston pump, four piston elements are preferably arranged, wherein the crank mechanisms of the piston elements are arranged offset to the gears at positions of 90 ° to each other.

Weiter bevorzugt sind Ventile der Kolbenpumpe in einem Deckelbereich des Zylinders angeordnet. Dadurch kann ein hohes nutzbares Fördervolumen bei sehr kompakter Bauweise erreicht werden.More preferably, valves of the piston pump are arranged in a cover region of the cylinder. As a result, a high usable delivery volume can be achieved with a very compact design.

Vorzugsweise ist der Antrieb der Kolbenpumpe ein Elektromotor.Preferably, the drive of the piston pump is an electric motor.

Weiter bevorzugt betrifft die vorliegende Erfindung ein Sitzsystem für ein Fahrzeug, welches eine erfindungsgemäße Kolbenpumpe umfasst. Die Kolbenpumpe dient dabei zur Förderung eines Fluids, insbesondere zur Förderung von Luft, um ein oder mehrere Sitzpolsterbereiche des Fahrzeugsitzes zu befüllen bzw. zu entleeren. Da die Kolbenpumpe sehr kompakt ausgebildet ist, kann sie unmittelbar in den Fahrersitz im Fahrzeuginneren integriert werden. Da die erfindungsgemäße Kolbenpumpe praktisch keine Geräuschemissionen aufweist, werden im Betrieb keine störenden Geräusche durch die Kolbenpumpe verursacht.More preferably, the present invention relates to a seat system for a vehicle comprising a piston pump according to the invention. The piston pump serves to convey a fluid, in particular to convey air, in order to fill or empty one or more seat cushion regions of the vehicle seat. Since the piston pump is very compact, it can be integrated directly into the driver's seat in the vehicle interior. Since the piston pump according to the invention has virtually no noise emissions, no disturbing noises are caused by the piston pump during operation.

Besonders bevorzugt werden die Sitzpolsterbereiche des Fahrzeugsitzes in Abhängigkeit von auf das Fahrzeug wirkenden Querbeschleunigungen befüllt bzw. entleert. Dadurch kann beispielsweise bei Kurvendurchfahrten ein verbesserter Seitenhalt im Sitz durch entsprechendes Befüllen seitlicher Sitzpolsterbereiche erhalten werden, welche die darauf befindliche Person abstützen. Weiter bevorzugt kann mit der erfindungsgemäßen Kolbenpumpe auch eine Massagefunktion durch ständiges Befüllen bzw. Entleeren der Sitzpolster ausgeführt werden.Particularly preferably, the seat cushion areas of the vehicle seat are filled or emptied depending on transverse accelerations acting on the vehicle. As a result, an improved lateral support in the seat can be obtained, for example, when cornering through corresponding filling of lateral seat cushion areas. which support the person on it. More preferably, with the piston pump according to the invention also a massage function can be performed by constantly filling or emptying the seat cushion.

Als Fluid für die Kolbenpumpe können sowohl Gase als auch Flüssigkeiten verwendet werden. Bei einer Verwendung in Fahrzeugsitzen ist es jedoch bevorzugt, Luft als Förderfluid zu verwenden, da dann kein intern geschlossener Kreislauf vorgesehen werden muss.As the fluid for the piston pump both gases and liquids can be used. When used in vehicle seats, however, it is preferred to use air as the conveying fluid, since then no internally closed circuit must be provided.

Zeichnungdrawing

Nachfolgend wird die vorliegende Erfindung anhand eines bevorzugten Ausführungsbeispiels unter Bezugnahme auf die Zeichnung beschrieben. In der Zeichnung ist:

Figur 1
eine schematische Ansicht einer Kolbenpumpe gemäß einem Ausführungsbeispiel der vorliegenden Erfindung,
Figur 2
eine schematische Seitenansicht der in Figur 1 gezeigten Kolbenpumpe,
Figur 3
eine schematische Ansieht des Gehäuse- und Zylinderbauteils der in den Figuren 1 und 2 gezeigten Kolbenpumpe, und
Figur 4
eine schematische Draufsicht der erfindungsgemäße Kolbenpumpe.
Hereinafter, the present invention will be described by way of a preferred embodiment with reference to the drawings. In the drawing is:
FIG. 1
a schematic view of a piston pump according to an embodiment of the present invention,
FIG. 2
a schematic side view of in FIG. 1 shown piston pump,
FIG. 3
a schematic view of the housing and cylinder component in the Figures 1 and 2 shown piston pump, and
FIG. 4
a schematic plan view of the piston pump according to the invention.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Nachfolgend wird unter Bezugnahme auf die Figuren 1 bis 4 eine Kolbenpumpe 1 gemäß einem Ausführungsbeispiel der vorliegenden Erfindung beschrieben.The following is with reference to the FIGS. 1 to 4 a piston pump 1 according to an embodiment of the present invention described.

Wie insbesondere aus den Figuren 1, 2 und 4 ersichtlich ist, umfasst die erfindungsgemäße Kolbenpumpe vier Kolben 2, welche in Reihe angeordnet sind. Jeder Kolben 2 umfasst einen Kurbeltrieb 3, bestehend aus einer Stange 3a, einem ersten Bolzen 3b und einem zweiten Bolzen 3c. Mittels des ersten Bolzens 3b ist die Stange 3a im Kolben 2 in bekannter Weise befestigt. Der zweite Bolzen 3c dient zur Befestigung der Stange 3a an einem Zahnrad 4. Wie aus Figur 1 ersichtlich ist, umfasst das Zahnrad 4 ein erstes stirnverzahntes Rad 4a und ein zweites stirnverzahntes Rad 4b, welche parallel zueinander an je einem seitlichen Zapfen 8 angeordnet sind. Aus Gründen einer besseren Übersichtlichkeit sind die Zähne der Zahnräder in den Figuren 1 bis 4 nicht im Detail dargestellt. Wie aus Figur 1 ersichtlich ist, ist der Kurbeltrieb 3 der Kolben somit jeweils zwischen dem ersten und dem zweiten Rad 4a und 4b angeordnet und mittels des zweiten Bolzens 3c befestigt.As in particular from the FIGS. 1, 2 and 4 it can be seen, the piston pump according to the invention comprises four pistons 2, which are arranged in series. Each piston 2 comprises a crank mechanism 3, consisting of a rod 3a, a first bolt 3b and a second bolt 3c. By means of the first bolt 3b, the rod 3a is fixed in the piston 2 in a known manner. The second pin 3c serves to fix the rod 3a to a gear 4. As shown in FIG FIG. 1 it can be seen, the gear 4 comprises a first end-toothed wheel 4a and a second end-toothed wheel 4b, which are arranged parallel to each other on a respective lateral pin 8. For better clarity, the teeth of the gears in the FIGS. 1 to 4 not shown in detail. How out FIG. 1 it can be seen, the crank mechanism 3 of the piston is thus arranged in each case between the first and the second wheel 4a and 4b and fastened by means of the second bolt 3c.

Ferner umfasst die erfindungsgemäße Kolbenpumpe 1 einen Motor 9, welcher eine Abtriebswelle 5 des Motors antreibt. Auf der Abtriebswelle 5 ist eine Schneckenverzahnung 6 angeordnet. Die Schneckenverzahnung 6 befindet sich mit einem Zwischenzahnrad 7 im Eingriff. Das Zwischenzahnrad 7 ist als Getriebe zwischen der Schneckenverzahnung 6 der Abtriebswelle 5 und den Zahnrädern 4 der Kolben angeordnet. Wie aus Figur 1 ersichtlich ist, umfasst das Zwischenzahnrad 7 eine erste Stirnverzahnung 7a, eine zweite Stirnverzahnung 7b sowie eine Schneckenverzahnung 7c. Die Schneckenverzahnung 7c ist dabei in der Mitte zwischen den beiden Stirnverzahnungen 7a und 7b angeordnet. Die Schneckenverzahnung 7c befindet sich mit der Schneckenverzahnung 6 der Abtriebswelle 5 im Eingriff. Die Stirnverzahnungen 7a und 7b des Zwischenzahnrads befinden sich jeweils mit den stirnverzahnten Rädern 4a bzw. 4b im Eingriff, wie in Figur 1 gezeigt.Furthermore, the piston pump 1 according to the invention comprises a motor 9, which drives an output shaft 5 of the motor. On the output shaft 5, a worm gear 6 is arranged. The worm gear 6 is engaged with an intermediate gear 7 in engagement. The intermediate gear 7 is arranged as a transmission between the worm gear 6 of the output shaft 5 and the gears 4 of the piston. How out FIG. 1 it can be seen, the intermediate gear 7 comprises a first end toothing 7a, a second end toothing 7b and a worm toothing 7c. The worm gear 7c is arranged in the middle between the two spur gears 7a and 7b. The Worm gear 7c is engaged with the worm gear 6 of the output shaft 5. The spur gears 7a and 7b of the intermediate gear are respectively engaged with the spur gears 4a and 4b, as in FIG FIG. 1 shown.

Somit erfolgt eine Übertragung der Drehzahl der Abtriebswelle 5 über die Schneckenverzahnung 6 auf die Schneckenverzahnung 7 des Zwischenzahnrads und von den Stirnverzahnungen 7a, 7b des Zwischenzahnrads auf die stirnverzahnten Räder 4a, 4b der Zahnräder 4 der Kolben. Wie aus den Figuren ersichtlich ist, sind die Kolben 2 jeweils benachbart in Reihe zueinander angeordnet. Dabei treibt das in der Reihe erste Zahnrad 4, welches von dem Zwischenzahnrad 7 angetrieben wird, das benachbarte nächste Zahnrad 4 des nächsten Kolbens 2 an, welcher seinerseits wieder das nächstbenachbarte Zahnrad usw. antreibt.Thus, a transmission of the rotational speed of the output shaft 5 via the worm gear 6 to the worm gear 7 of the intermediate gear and of the spur gears 7a, 7b of the intermediate gear on the front-toothed wheels 4a, 4b of the gears 4 of the piston. As can be seen from the figures, the pistons 2 are each arranged adjacent to each other in series. It drives in the series first gear 4, which is driven by the intermediate gear 7, the adjacent next gear 4 of the next piston 2, which in turn drives again the next adjacent gear, etc.

Wie insbesondere aus Figur 2 ersichtlich ist, sind die Kolben 2 derart am Zahnrad 4 befestigt, dass sie jeweils um 90° zueinander versetzt angeordnet sind. Diese Maßnahme ermöglicht es, ein Pulsieren des Förderstroms zu minimieren. Weiterhin kann die erfindungsgemäße Kolbenpumpe dadurch mit einer größeren Laufruhe betrieben werden.As in particular from FIG. 2 it can be seen, the pistons 2 are fixed to the gear 4 so that they are each offset by 90 ° to each other. This measure makes it possible to minimize pulsation of the delivery flow. Furthermore, the piston pump according to the invention can thereby be operated with a greater smoothness.

Figur 3 zeigt schematisch das Zylindergehäuse, welches die Kolben 2 aufnimmt und welches mit einem Zylinderdeckel 11 abgedeckt ist. Im Zylinderdeckel 11 sind jeweils Ventile 12 an der Stirnseite angeordnet, sodass ein besonders platzsparender Aufbau möglich ist. Die Ventile 12 sind vorzugsweise als Rückschlagventile ausgebildet, um eine einfache Steuerung der Pumpe zu ermöglichen. FIG. 3 schematically shows the cylinder housing which receives the piston 2 and which is covered with a cylinder cover 11. In the cylinder cover 11 valves 12 are arranged on the front side, so that a particularly space-saving design is possible. The valves 12 are preferably designed as check valves to allow easy control of the pump.

Ein Getriebegehäuse des Zwischenzahnrads 7 ist mit dem Bezugszeichen 14 bezeichnet. Wie weiter aus Figur 3 ersichtlich ist, ist eine Seitenplatte 13 vorgesehen, an welcher die Zahnräder 4 mittels der Zapfen 8 drehbar gelagert sind.A gear housing of the intermediate gear 7 is designated by the reference numeral 14. How farther FIG. 3 it can be seen, a side plate 13 is provided, on which the gears 4 are rotatably supported by means of the pins 8.

Durch die erfindungsgemäße Anordnung des Kurbeltriebs 3 am Zahnrad 4 kann ein besonders kompakter und flacher Aufbau realisiert werden. Weiterhin kann durch die Verwendung des Schneckengetriebes zwischen der Schneckenverzahnung 6 und dem Zwischenzahnrad 7 ein geräuschloser Betrieb der Kolbenpumpe 1 realisiert werden. Die Verwendung des Schneckentriebes ermöglicht es, eine Untersetzung der Drehzahl der Abtriebswelle 5 am Zwischenzahnrad 7 zu erzeugen, ohne dass zusätzliche Übertragungselemente notwendig sind. Die Kurbeltriebe 3 der Kolben 2 werden dann über die gleich ausgebildeten Zahnräder 4 übertragen.The inventive arrangement of the crank mechanism 3 on the gear 4, a particularly compact and flat structure can be realized. Furthermore, by using the worm gear between the worm gear 6 and the intermediate gear 7, a noiseless operation of the piston pump 1 can be realized. The use of the worm drive makes it possible to produce a reduction of the rotational speed of the output shaft 5 on the intermediate gear 7, without additional transmission elements are necessary. The crank mechanisms 3 of the pistons 2 are then transmitted via the identically designed gears 4.

Wie aus den Figuren 1 und 4 ersichtlich ist, hängt die Dicke der Kolbenpumpe 1 jedoch im Wesentlichen vom Durchmesser der Kolben 2 bzw. des Zylinders ab. Die Hintereinanderanordnung der Kurbeltriebe ermöglicht dabei eine besonders flache Bauweise einer Mehrzylinderpumpe bzw. eines Mehrzylinderverdichters. Die Verwendung des Schneckentriebes ermöglicht weiterhin eine Bauweise mit hohem Untersetzungsverhältnis bei gleichzeitig minimaler Bauteileanzahl und besonders leisem Lauf.Like from the FIGS. 1 and 4 However, the thickness of the piston pump 1 depends essentially on the diameter of the piston 2 and the cylinder. The sequential arrangement of the crank drives allows a particularly flat design of a multi-cylinder pump or a multi-cylinder compressor. The use of the worm drive further allows a construction with a high reduction ratio while minimizing the number of components and particularly quiet running.

Claims (12)

  1. Piston pump for the conveyance of fluids, comprising a multiplicity of piston elements (2) movable in each case in a cylinder (10) and a drive (9) driving a driveshaft (5) which drives a multiplicity of gearwheels (4), each piston element (2) being fastened to the respective gearwheel (4) by means of a crank mechanism (3), the driveshaft (5) having a worm toothing (6) which drives the multiplicity of gearwheels (4), and the multiplicity of piston elements (2) being arranged in series.
  2. Piston pump according to Claim 1, characterized by a gear which is arranged between the driveshaft (5) with a worm toothing (6) and the gearwheel (4).
  3. Piston pump according to Claim 2, characterized in that the gear is designed as an intermediate gearwheel (7).
  4. Piston pump according to Claim 3, characterized in that the intermediate gearwheel (7) has a worm-toothed region (7c) and a spur-toothed region (7a, 7b), which regions are arranged adjacently to one another on an end-face circumference of the intermediate gearwheel.
  5. Piston pump according to one of the preceding claims, characterized in that the crank mechanisms of the piston elements are arranged one behind the other.
  6. Piston pump according to Claim 5, characterized in that a gearwheel (4) of a first piston element (2) drives a gearwheel of a second adjacent piston element.
  7. Piston pump according to Claim 5 or 6, characterized in that exactly four piston elements are arranged, the crank mechanisms (3) of the four piston elements (2) being arranged in positions on the gearwheels (4) which are in each case offset at 90º with respect to an adjacent piston element.
  8. Piston pump according to one of the preceding claims, characterized in that the valves (12) of the piston pump are arranged in a cover region (11) of the cylinder (10).
  9. Piston pump according to one of the preceding claims, characterized in that the drive (9) is an electric motor.
  10. Seat system for a vehicle, comprising a piston pump (1) according to one of the preceding claims and at least one fillable and emptyable seat-cushion region which can be filled and emptied by means of the piston pump (1).
  11. Seat system according to Claim 10, characterized in that the piston pump (1) fills or empties a seat-cushion region as a function of transverse accelerations exerted on the vehicle.
  12. Seat system according to Claim 9 or 10, characterized in that the piston pump (1) continuously fills and subsequently empties a seat-cushion region in order to provide a massage function for the person located on the seat.
EP05763076A 2004-09-22 2005-06-30 Reciprocating pump for delivering fluids Not-in-force EP1794452B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004045817A DE102004045817A1 (en) 2004-09-22 2004-09-22 Piston pump for conveying fluids
PCT/EP2005/053102 WO2006032548A1 (en) 2004-09-22 2005-06-30 Reciprocating pump for delivering fluids

Publications (2)

Publication Number Publication Date
EP1794452A1 EP1794452A1 (en) 2007-06-13
EP1794452B1 true EP1794452B1 (en) 2008-10-15

Family

ID=34972600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05763076A Not-in-force EP1794452B1 (en) 2004-09-22 2005-06-30 Reciprocating pump for delivering fluids

Country Status (7)

Country Link
EP (1) EP1794452B1 (en)
JP (1) JP4723588B2 (en)
KR (1) KR100995488B1 (en)
AT (1) ATE411467T1 (en)
DE (2) DE102004045817A1 (en)
ES (1) ES2315886T3 (en)
WO (1) WO2006032548A1 (en)

Cited By (6)

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Publication number Priority date Publication date Assignee Title
DE102009001240A1 (en) 2009-02-27 2010-09-02 Robert Bosch Gmbh Electrical pump for use in motor vehicle, has suction channel arranged in gear housing such that fluid sucked by compression elements is provided directly to gear wheels for cooling wheels, where wheels are designed as worm wheels
DE102009001233A1 (en) 2009-02-27 2010-09-02 Robert Bosch Gmbh Piston for piston pump for supply of fluids to pneumatic driven devices in motor vehicle, has retainers designed in wall so that connecting rod with one of shafts is mounted in insertable manner into piston radial to lifting direction
DE102009001237A1 (en) 2009-02-27 2010-09-02 Robert Bosch Gmbh Electric pump for conveying fluids, particularly for feeding pneumatically operated devices in vehicle, has electric motor, where gear housing has frame element with depth
DE102009001234A1 (en) 2009-02-27 2010-09-02 Robert Bosch Gmbh Gearbox casing, particularly for electric pump for feeding pneumatically operated devices in vehicle, has base module which has interface for fastening electric motor
DE102010042616A1 (en) 2010-10-19 2012-04-19 Robert Bosch Gmbh Cooling mechanism for reciprocating piston pump used in motor vehicle, has cooling fins that are arranged in side portions of crank wheel bearing such that heat dissipation to cylinder head plate is enabled
DE102010042620A1 (en) 2010-10-19 2012-04-19 Robert Bosch Gmbh Method for controlling multi-phase series piston pump used in motor vehicle, involves changing duty factor of pulse signal for controlling drive motor of series piston pump in order to reduce driving power of drive motor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007020286A1 (en) 2007-04-30 2008-11-06 Robert Bosch Gmbh Pressure genartion unit has piston with piston drive moving in cylinder element, where another piston with another piston drive is moved in another cylinder element
DE102010042618A1 (en) 2010-10-19 2012-04-19 Robert Bosch Gmbh Series pump for use as compact air- or fluid pump in motor vehicle, has pistons with crank gears, where crank gears are connected to each other in torque locking manner by using spur gears

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009001240A1 (en) 2009-02-27 2010-09-02 Robert Bosch Gmbh Electrical pump for use in motor vehicle, has suction channel arranged in gear housing such that fluid sucked by compression elements is provided directly to gear wheels for cooling wheels, where wheels are designed as worm wheels
DE102009001233A1 (en) 2009-02-27 2010-09-02 Robert Bosch Gmbh Piston for piston pump for supply of fluids to pneumatic driven devices in motor vehicle, has retainers designed in wall so that connecting rod with one of shafts is mounted in insertable manner into piston radial to lifting direction
DE102009001237A1 (en) 2009-02-27 2010-09-02 Robert Bosch Gmbh Electric pump for conveying fluids, particularly for feeding pneumatically operated devices in vehicle, has electric motor, where gear housing has frame element with depth
DE102009001234A1 (en) 2009-02-27 2010-09-02 Robert Bosch Gmbh Gearbox casing, particularly for electric pump for feeding pneumatically operated devices in vehicle, has base module which has interface for fastening electric motor
DE102010042616A1 (en) 2010-10-19 2012-04-19 Robert Bosch Gmbh Cooling mechanism for reciprocating piston pump used in motor vehicle, has cooling fins that are arranged in side portions of crank wheel bearing such that heat dissipation to cylinder head plate is enabled
DE102010042620A1 (en) 2010-10-19 2012-04-19 Robert Bosch Gmbh Method for controlling multi-phase series piston pump used in motor vehicle, involves changing duty factor of pulse signal for controlling drive motor of series piston pump in order to reduce driving power of drive motor

Also Published As

Publication number Publication date
JP4723588B2 (en) 2011-07-13
ES2315886T3 (en) 2009-04-01
DE102004045817A1 (en) 2006-03-23
JP2008513666A (en) 2008-05-01
DE502005005714D1 (en) 2008-11-27
ATE411467T1 (en) 2008-10-15
KR20070054675A (en) 2007-05-29
KR100995488B1 (en) 2010-11-22
EP1794452A1 (en) 2007-06-13
WO2006032548A1 (en) 2006-03-30

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