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WO2010057690A2 - Vacuum pump - Google Patents

Vacuum pump Download PDF

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Publication number
WO2010057690A2
WO2010057690A2 PCT/EP2009/059868 EP2009059868W WO2010057690A2 WO 2010057690 A2 WO2010057690 A2 WO 2010057690A2 EP 2009059868 W EP2009059868 W EP 2009059868W WO 2010057690 A2 WO2010057690 A2 WO 2010057690A2
Authority
WO
WIPO (PCT)
Prior art keywords
housing
vacuum pump
housing bottom
pump according
receptacle
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.)
Ceased
Application number
PCT/EP2009/059868
Other languages
German (de)
French (fr)
Other versions
WO2010057690A3 (en
Inventor
Bernd Hess
Willi Schneider
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.)
Joma Polytec Kunststofftechnik GmbH
Original Assignee
Joma Polytec Kunststofftechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42114694&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2010057690(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Joma Polytec Kunststofftechnik GmbH filed Critical Joma Polytec Kunststofftechnik GmbH
Priority to US12/998,678 priority Critical patent/US20110217200A1/en
Priority to EP09781288A priority patent/EP2347131B1/en
Priority to CN2009801461106A priority patent/CN102216622A/en
Publication of WO2010057690A2 publication Critical patent/WO2010057690A2/en
Publication of WO2010057690A3 publication Critical patent/WO2010057690A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members
    • F16K15/148—Check valves with flexible valve members the closure elements being fixed in their centre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0209—Check valves or pivoted valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F04C18/3442—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the inlet and outlet opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2220/00—Application
    • F04C2220/10—Vacuum

Definitions

  • the invention relates to a vacuum pump, in particular a
  • Vane pump with a pump housing, in which a suction chamber is provided, and opening into the suction pump housing breakthrough, wherein in the pump housing breakthrough opening into the open or in an external vacuum space suction check valve is arranged, which is housed in a pot-shaped valve housing and the cup-shaped valve housing has a housing bottom and a housing shell.
  • a vacuum pump with such a structure has become known.
  • air is sucked out of a vacuum space, for example a brake booster, whereby the suction space inside the vacuum pump is formed by vane cells.
  • the vacuum pump is equipped with a suction check valve, which is arranged in a pump housing breakthrough.
  • This suction-check valve is sleeve-like and has a cup-shaped valve housing with a housing shell and a housing bottom, wherein the housing bottom is inserted into the pump housing of the vacuum pump.
  • the sealing of the suction check valve in the pump housing breakthrough takes place for example by means of sealing elements, for example O-rings.
  • a holding body is used in the housing shell of the suction check valve, which serves to hold the valve body.
  • suction-check valve in particular its valve housing, is constructed in several parts, and that the valve body is attached to a separate component, namely the holding body.
  • a fast and simple, especially automated, Assembly is made more difficult.
  • the invention is therefore an object of the invention to provide a vacuum pump, in particular a suction check valve, which or which has a simplified structure.
  • the invention thus relates to a vacuum pump or a suction check valve, wherein the housing bottom is not formed as a separate component, in particular as a holding body for the valve body, but is integrally connected to the housing shell.
  • integrally formed on the housing shell housing bottom forms a defined holding element for the valve body, so that it can take a defined and exact position.
  • no holding body has to be held in position by the valve body.
  • a simple automated assembly is therefore easily possible because the valve body of the suction check valve must be equipped only with the valve body, i. that the valve body only has to be inserted into the valve housing.
  • Valve housing on a receptacle for a holding portion of the valve body.
  • the holding portion of the valve body is attached to the receptacle, so that the valve body rests securely on the housing bottom and is thereby ensured that the valve body can completely close the valve openings located in the housing bottom or can release during the suction operation.
  • the receptacle is formed as a breakthrough.
  • the receptacle can completely penetrate the housing bottom, which has the advantage that the receptacle can be made relatively simple, for example in the form of a bore.
  • the assembly is thereby facilitated because the holding section only in the Recording must be inserted or plugged.
  • Recording has a hollow cylindrical, in particular a circular cylindrical, cross-section.
  • the receptacle is formed, for example, by a bore or punched into which a pin or knob-like holding portion, which also has a cylindrical cross-section, is inserted or inserted. A locking of the pin in the recording is not.
  • the receptacle according to the invention is formed undercuts, a simple automatic assembly can be done without locking connections or locking between the receptacle and the valve body must be made.
  • the valve body consists of an elastic, in particular rubber-elastic material, so that this completely conform to the openings in the housing bottom and can seal them. It is also conceivable to produce the valve body made of spring steel, optionally with a coating as a sealing element.
  • the bottom of the cup-shaped valve housing has a housing jacket over the housing bottom continuing edge and in the space formed by the housing bottom edge of a holding disc is pressed.
  • the retaining washer which is also penetrated by openings, forms a securing element which holds the valve element on the housing bottom.
  • the mounting of the retaining disk takes place only in that it is pressed into the intermediate space, which is surrounded by the edge, and thereby held captive.
  • the retaining disc has a slight excess and is deformed by the pressing and jammed in the space.
  • the valve element is arranged between the housing bottom and the retaining washer and is held by the retaining washer on the housing bottom.
  • the retaining washer presses the holding section into the receptacle of the housing bottom and thereby fixes the valve element.
  • Figure 1 shows a longitudinal section l-l according to Figure 3 by a
  • Suction check valve which is inserted into a hinted housing of a vacuum pump
  • Figure 2 is a side view of the valve of Figure 1;
  • Figure 3 is a view in the direction of arrow III of Figure 2.
  • FIG. 4 shows a view in the direction of the arrow IV according to FIG. 2.
  • FIG. 1 shows an indication of a portion of a generally designated 10 pump housing of a vacuum pump 12, wherein 14 denotes the inner peripheral surface of a suction chamber 16.
  • a suction check valve 24 is used, on whose free end 26 a (not shown) suction hose can be pushed.
  • the suction check valve 24 shown in longitudinal section has a valve housing 28, which is cup-shaped and is formed essentially by a housing shell 30 and a housing bottom 32.
  • the housing jacket 30 extends beyond the housing bottom 32 into an edge 34, which projects beyond the housing bottom 32 on its opposite side.
  • the valve housing 28 is provided with a circumferential groove 36 into which a sealing ring 38, in particular an O-ring, is inserted.
  • the housing bottom 32 which can also be seen in Figure 3, is with
  • Openings 40 are provided which allow the overflow of air in the direction of the suction chamber 16. These breakthroughs 40 are on the Suction chamber 16 facing side of the housing bottom 32 covered by an elastic valve body 42 so that air can flow only in the direction of the suction chamber 16 when the valve body 42 lifts and the openings 40 are free.
  • the valve body 42 is constructed rotationally symmetrical and has a substantially conical cap 44 which covers the openings 40 and which is arranged on a central holding section 46, in the exemplary embodiment shown, a pin 47.
  • This pin 47 passes through a receptacle 48 in the housing bottom 32, wherein the receptacle 48 is formed as a circular cylindrical bore.
  • the receptacle 48 and the pin 47 are formed without undercuts, so that the pin 47 can be easily inserted into the receptacle 48 and pulled out of this again.
  • a holding element in particular a holding plate 50, which is pressed into the space surrounded by the edge 34 gap.
  • the retaining disc 50 thus has a slight oversize relative to the circumference of the space bounded by the edge 34.
  • the holding plate 50 also has openings 52, which can be seen from Figure 4, through which air can be sucked in the direction of the suction chamber 16.
  • the retaining washer 50 is pressed so far that its central region on the valve body 42 bears against the pin 47 and thereby holds the pin 47 in the receptacle 48.
  • Between the slightly conical housing bottom 42 and the retaining plate 50 is a sufficiently large space in which the cap 44 can be deflected when it is lifted from the openings 40 during the intake of air.
  • valve housing 28 with one-piece housing shell 30 and housing bottom 32 allows a quick and easy installation of the valve body 42 which is not latched to the housing bottom 32 and is held only by the retaining plate 50 on the housing bottom 32.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The invention relates to a vacuum pump, in particular a vane cell pump, having a housing in which a suction space is provided, and a housing passage opening into the suction space, wherein a suction non-return valve opening to the outside or into an external vacuum space is arranged in the housing passage, said valve being accommodated in a crucible-shaped housing, and the crucible-shaped housing having a housing bottom and a housing jacket, wherein the housing bottom is integral with the housing jacket.

Description

Beschreibung Titel: Vakuumpumpe Description Title: Vacuum pump

[0001] Die Erfindung betrifft eine Vakuumpumpe, insbesondere eineThe invention relates to a vacuum pump, in particular a

Flügelzellenpumpe, mit einem Pumpengehäuse, in welchem ein Saugraum vorgesehen ist, und einem in den Saugraum einmündenden Pumpengehäusedurchbruch, wobei im Pumpengehäusedurchbruch ein ins Freie oder in einen externen Unterdruckraum mündendes Saug-Rückschlagventil angeordnet ist, welches in einem topförmigen Ventilgehäuse untergebracht ist und das topfförmige Ventilgehäuse einen Gehäuseboden und einen Gehäusemantel aufweist.Vane pump, with a pump housing, in which a suction chamber is provided, and opening into the suction pump housing breakthrough, wherein in the pump housing breakthrough opening into the open or in an external vacuum space suction check valve is arranged, which is housed in a pot-shaped valve housing and the cup-shaped valve housing has a housing bottom and a housing shell.

[0002] Aus der WO 2008/009251 A1 ist eine Vakuumpumpe mit einem derartigen Aufbau bekannt geworden. Mit dieser Vakuumpumpe wird Luft aus einem Unterdruckraum, zum Beispiel einem Bremskraftverstärker, abgesaugt, wobei der Saugraum innerhalb der Vakuumpumpe von Flügelzellen gebildet wird. Um eine Rückströmung zu verhindern, ist die Vakuumpumpe mit einem Saug-Rückschlagventil ausgestattet, welches in einem Pumpengehäusedurchbruch angeordnet ist. Dieses Saug-Rückschlagventil ist hülsenartig ausgebildet und besitzt ein topfförmiges Ventilgehäuse mit einem Gehäusemantel und einem Gehäuseboden, wobei der Gehäuseboden in das Pumpengehäuse der Vakuumpumpe eingesetzt ist. Auf das freie Ende des Saug-Rückschlagventils, welches aus dem Pumpengehäuse der Vakuumpumpe herausragt, wird zum Beispiel ein Unterdruckschlauch aufgeschoben. Die Abdichtung des Saug-Rückschlagventils im Pumpengehäusedurchbruch erfolgt zum Beispiel mittels Dichtungselementen, zum Beispiel O-Ringen. Bei der oben genannten bekannten Vakuumpumpe ist in den Gehäusemantel des Saug-Rückschlagventils ein Haltekörper eingesetzt, welcher zur Halterung des Ventilkörpers dient.From WO 2008/009251 A1, a vacuum pump with such a structure has become known. With this vacuum pump, air is sucked out of a vacuum space, for example a brake booster, whereby the suction space inside the vacuum pump is formed by vane cells. In order to prevent backflow, the vacuum pump is equipped with a suction check valve, which is arranged in a pump housing breakthrough. This suction-check valve is sleeve-like and has a cup-shaped valve housing with a housing shell and a housing bottom, wherein the housing bottom is inserted into the pump housing of the vacuum pump. On the free end of the suction check valve, which protrudes from the pump housing of the vacuum pump, for example, a vacuum hose is pushed. The sealing of the suction check valve in the pump housing breakthrough takes place for example by means of sealing elements, for example O-rings. In the above known vacuum pump, a holding body is used in the housing shell of the suction check valve, which serves to hold the valve body.

[0003] Als nachteilig wird angesehen, dass das Saug-Rückschlagventil, insbesondere dessen Ventilgehäuse, mehrteilig aufgebaut ist, und dass der Ventilkörper an einem separaten Bauteil, nämlich dem Haltekörper, befestigt ist. Eine schnelle und einfache, insbesondere automatisierte, Montage wird dadurch erschwert.A disadvantage is considered that the suction-check valve, in particular its valve housing, is constructed in several parts, and that the valve body is attached to a separate component, namely the holding body. A fast and simple, especially automated, Assembly is made more difficult.

[0004] Der Erfindung liegt daher die Aufgabe zugrunde, eine Vakuumpumpe, insbesondere ein Saug-Rückschlagventil, bereitzustellen, welche beziehungsweise welches einen vereinfachten Aufbau aufweist.The invention is therefore an object of the invention to provide a vacuum pump, in particular a suction check valve, which or which has a simplified structure.

[0005] Diese Aufgabe wird mit einer Vakuumpumpe der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass der Gehäuseboden und der Gehäusemantel des Saug-Rückschlagventils einstückig ausgebildet sind.This object is achieved with a vacuum pump of the type mentioned in the present invention, that the housing bottom and the housing shell of the suction check valve are integrally formed.

[0006] Die Erfindung betrifft also eine Vakuumpumpe beziehungsweise ein Saug-Rückschlagventil, bei welchem der Gehäuseboden nicht als separates Bauteil, insbesondere als Haltekörper für den Ventilkörper, ausgebildet ist, sondern einstückig mit dem Gehäusemantel verbunden ist. Zum einen muss bei der Montage der Gehäuseboden nicht mehr in den Gehäusemantel lagerichtig eingesetzt werden, zum anderen bildet der einstückig am Gehäusemantel angeformte Gehäuseboden ein definiertes Halteelement für den Ventilkörper, so dass dieser eine definierte und exakte Position einnehmen kann. Anders als beim Stand der Technik muss vom Ventilkörper kein Haltekörper mehr in Position gehalten werden. Eine einfache automatisierte Montage ist daher problemlos möglich, da das Ventilgehäuse des Saug-Rückschlagventils lediglich mit dem Ventilkörper bestückt werden muss, d.h. dass der Ventilkörper lediglich in das Ventilgehäuse eingesetzt werden muss.The invention thus relates to a vacuum pump or a suction check valve, wherein the housing bottom is not formed as a separate component, in particular as a holding body for the valve body, but is integrally connected to the housing shell. First, when mounting the housing bottom no longer must be used in the housing shell in the correct position, on the other hand integrally formed on the housing shell housing bottom forms a defined holding element for the valve body, so that it can take a defined and exact position. Unlike the prior art, no holding body has to be held in position by the valve body. A simple automated assembly is therefore easily possible because the valve body of the suction check valve must be equipped only with the valve body, i. that the valve body only has to be inserted into the valve housing.

[0007] Zur exakten Position des Ventilkörpers weist der Gehäuseboden desFor the exact position of the valve body, the housing bottom of the

Ventilgehäuses eine Aufnahme für einen Halteabschnitt des Ventilkörpers auf. Der Halteabschnitt des Ventilkörpers wird an der Aufnahme befestigt, so dass der Ventilkörper sicher am Gehäuseboden anliegt und dadurch gewährleistet wird, dass der Ventilkörper die im Gehäuseboden sich befindenden Ventilöffnungen vollständig verschließen beziehungsweise während des Saugbetriebes freigeben kann.Valve housing on a receptacle for a holding portion of the valve body. The holding portion of the valve body is attached to the receptacle, so that the valve body rests securely on the housing bottom and is thereby ensured that the valve body can completely close the valve openings located in the housing bottom or can release during the suction operation.

[0008] Bei einer bevorzugten Ausführungsform ist die Aufnahme als Durchbruch ausgebildet. Dabei kann die Aufnahme den Gehäuseboden vollständig durchsetzen, was den Vorteil hat, dass die Aufnahme relativ einfach, z.B. in Form einer Bohrung hergestellt werden kann. Außerdem wird dadurch auch die Montage erleichtert, da der Halteabschnitt lediglich in die Aufnahme eingesetzt beziehungsweise eingesteckt werden muss.In a preferred embodiment, the receptacle is formed as a breakthrough. In this case, the receptacle can completely penetrate the housing bottom, which has the advantage that the receptacle can be made relatively simple, for example in the form of a bore. In addition, the assembly is thereby facilitated because the holding section only in the Recording must be inserted or plugged.

[0009] Eine relativ einfache und daher bevorzugte Variante sieht vor, dass dieA relatively simple and therefore preferred variant provides that the

Aufnahme einen hohlzylindrischen, insbesondere einen kreiszylindrischen, Querschnitt aufweist. Die Aufnahme wird zum Beispiel von einer Bohrung oder Ausstanzung gebildet, in welche ein zapfen- oder noppenartiger Halteabschnitt, der ebenfalls einen zylinderförmigen Querschnitt besitzt, eingesetzt beziehungsweise eingesteckt wird. Eine Verrastung des Zapfens in der Aufnahme erfolgt nicht.Recording has a hollow cylindrical, in particular a circular cylindrical, cross-section. The receptacle is formed, for example, by a bore or punched into which a pin or knob-like holding portion, which also has a cylindrical cross-section, is inserted or inserted. A locking of the pin in the recording is not.

[0010] Da die Aufnahme erfindungsgemäß hinterschneidungsfrei ausgebildet ist, kann eine einfache automatische Montage erfolgen, ohne dass Rastverbindungen oder Verrastungen zwischen der Aufnahme und dem Ventilkörper hergestellt werden müssen.Since the receptacle according to the invention is formed undercuts, a simple automatic assembly can be done without locking connections or locking between the receptacle and the valve body must be made.

[0011] Bevorzugt besteht der Ventilkörper aus einem elastischen, insbesondere gummielastischen Material, so dass sich dieser vollständig an die Öffnungen im Gehäuseboden anschmiegen und diese abdichten kann. Es ist auch denkbar, den Ventilkörper aus Federstahl, gegebenenfalls mit einer Beschichtung als Dichtungselement herzustellen.Preferably, the valve body consists of an elastic, in particular rubber-elastic material, so that this completely conform to the openings in the housing bottom and can seal them. It is also conceivable to produce the valve body made of spring steel, optionally with a coating as a sealing element.

[0012] Bei einer Weiterbildung ist vorgesehen, dass der Boden des topfförmigen Ventilgehäuses einen den Gehäusemantel über den Gehäuseboden hinaus fortsetzenden Rand aufweist und in den vom den Gehäuseboden überragenden Rand gebildeten Zwischenraum eine Haltescheibe eingepresst ist. Die Haltescheibe, welche ebenfalls von Öffnungen durchsetzt ist, bildet ein Sicherungselement, welches das Ventilelement am Gehäuseboden festhält. Die Montage der Haltescheibe erfolgt lediglich dadurch, dass diese in den Zwischenraum, der vom Rand umgeben ist, eingepresst und dadurch verliersicher gehalten wird. Die Haltescheibe besitzt ein geringfügiges Übermaß und wird durch das Einpressen verformt und verklemmt im Zwischenraum.In a further development, it is provided that the bottom of the cup-shaped valve housing has a housing jacket over the housing bottom continuing edge and in the space formed by the housing bottom edge of a holding disc is pressed. The retaining washer, which is also penetrated by openings, forms a securing element which holds the valve element on the housing bottom. The mounting of the retaining disk takes place only in that it is pressed into the intermediate space, which is surrounded by the edge, and thereby held captive. The retaining disc has a slight excess and is deformed by the pressing and jammed in the space.

[0013] Das Ventilelement ist zwischen dem Gehäuseboden und der Haltescheibe angeordnet und wird von der Haltescheibe am Gehäuseboden festgehalten. Dabei drückt die Haltescheibe den Halteabschnitt in die Aufnahme des Gehäusebodens ein und fixiert dadurch das Ventilelement.The valve element is arranged between the housing bottom and the retaining washer and is held by the retaining washer on the housing bottom. In this case, the retaining washer presses the holding section into the receptacle of the housing bottom and thereby fixes the valve element.

[0014] Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung ein besonders bevorzugtes Ausführungsbeispiel im Einzelnen beschrieben ist. Dabei können die in der Zeichnung dargestellten sowie in der Beschreibung und in den Ansprüchen erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein.Further advantages, features and details of the invention will become apparent From the subclaims and the following description in which a particularly preferred embodiment is described in detail with reference to the drawing. The features shown in the drawing and mentioned in the description and in the claims may each be essential to the invention individually or in any combination.

[0015] In der Zeichnung zeigen:In the drawing:

[0016] Figur 1 einen Längsschnitt l-l gemäß Figur 3 durch einFigure 1 shows a longitudinal section l-l according to Figure 3 by a

Saug-Rückschlagventil, welches in ein andeutungsweise dargestelltes Gehäuse einer Vakuumpumpe eingesetzt ist;Suction check valve, which is inserted into a hinted housing of a vacuum pump;

[0017] Figur 2 eine Seitenansicht des Ventils gemäß Figur 1 ;Figure 2 is a side view of the valve of Figure 1;

[0018] Figur 3 eine Ansicht in Richtung des Pfeils III gemäß Figur 2; undFigure 3 is a view in the direction of arrow III of Figure 2; and

[0019] Figur 4 eine Ansicht in Richtung des Pfeils IV gemäß Figur 2.FIG. 4 shows a view in the direction of the arrow IV according to FIG. 2.

[0020] Die Figur 1 zeigt andeutungsweise einen Abschnitt eines insgesamt mit 10 bezeichneten Pumpengehäuses einer Vakuumpumpe 12, wobei mit 14 die Innenumfangsfläche eines Saugraums 16 bezeichnet ist. In diesen Saugraum 16 mündet ein Kanal 18 eines Pumpengehäusedurchbruchs 20, welcher ins Freie 22 ausmündet. In diesen Pumpengehäusedurchbruch 20 ist ein Saug-Rückschlagventil 24 eingesetzt, auf dessen freies Ende 26 ein (nicht dargestellter) Saugschlauch aufgeschoben werden kann. Das im Längsschnitt dargestellte Saug-Rückschlagventil 24 besitzt ein Ventilgehäuse 28, welches topfförmig ausgebildet ist und im Wesentlichen von einem Gehäusemantel 30 und einem Gehäuseboden 32 gebildet wird. Der Gehäusemantel 30 erstreckt sich über den Gehäuseboden 32 hinaus in einen Rand 34, weicher den Gehäuseboden 32 auf dessen gegenüberliegenden Seite überragt. Zur fluiddichten Aufnahme des Saug-Rückschlagventils 24 im Pumpengehäusedurchbruch 20 ist das Ventilgehäuse 28 mit einer Umfangsnut 36 versehen, in welche ein Dichtungsring 38, insbesondere ein O-Ring, eingesetzt ist.Figure 1 shows an indication of a portion of a generally designated 10 pump housing of a vacuum pump 12, wherein 14 denotes the inner peripheral surface of a suction chamber 16. In this suction chamber 16 opens a channel 18 of a pump housing opening 20, which opens into the open 22. In this pump housing opening 20, a suction check valve 24 is used, on whose free end 26 a (not shown) suction hose can be pushed. The suction check valve 24 shown in longitudinal section has a valve housing 28, which is cup-shaped and is formed essentially by a housing shell 30 and a housing bottom 32. The housing jacket 30 extends beyond the housing bottom 32 into an edge 34, which projects beyond the housing bottom 32 on its opposite side. For fluid-tight reception of the suction check valve 24 in the pump housing opening 20, the valve housing 28 is provided with a circumferential groove 36 into which a sealing ring 38, in particular an O-ring, is inserted.

[0021] Der Gehäuseboden 32, welcher auch in Figur 3 erkennbar ist, ist mitThe housing bottom 32, which can also be seen in Figure 3, is with

Durchbrüchen 40 versehen, welche das Überströmen von Luft in Richtung des Saugraums 16 erlauben. Diese Durchbrüche 40 werden auf der dem Saugraum 16 zugewandten Seite des Gehäusebodens 32 von einem elastischen Ventilkörper 42 abgedeckt, so dass Luft lediglich in Richtung des Saugraums 16 strömen kann, wenn der Ventilkörper 42 abhebt und die Durchbrüche 40 frei gibt. Der Ventilkörper 42 ist rotationssymmetrisch aufgebaut und weist eine die Durchbrüche 40 abdeckende im Wesentlichen kegelförmige Kappe 44 auf, welche an einem zentralen Halteabschnitt 46, im dargestellten Ausführungsbeispiel einem Zapfen 47 angeordnet ist. Dieser Zapfen 47 durchgreift eine Aufnahme 48 im Gehäuseboden 32, wobei die Aufnahme 48 als kreiszylindrische Bohrung ausgebildet ist. Die Aufnahme 48 sowie der Zapfen 47 sind hinterschneidungsfrei ausgebildet, so dass der Zapfen 47 problemlos in die Aufnahme 48 eingesteckt und aus dieser wieder herausgezogen werden kann.Openings 40 are provided which allow the overflow of air in the direction of the suction chamber 16. These breakthroughs 40 are on the Suction chamber 16 facing side of the housing bottom 32 covered by an elastic valve body 42 so that air can flow only in the direction of the suction chamber 16 when the valve body 42 lifts and the openings 40 are free. The valve body 42 is constructed rotationally symmetrical and has a substantially conical cap 44 which covers the openings 40 and which is arranged on a central holding section 46, in the exemplary embodiment shown, a pin 47. This pin 47 passes through a receptacle 48 in the housing bottom 32, wherein the receptacle 48 is formed as a circular cylindrical bore. The receptacle 48 and the pin 47 are formed without undercuts, so that the pin 47 can be easily inserted into the receptacle 48 and pulled out of this again.

[0022] Zur Lagesicherung des Ventilkörpers 42, insbesondere des Zapfens 47 in der Aufnahme 48, dient ein Halteelement, insbesondere eine Haltescheibe 50, welche in den vom Rand 34 umgebenen Zwischenraum eingepresst ist. Die Haltescheibe 50 besitzt also ein geringes Übermaß gegenüber dem Umfang des vom Rand 34 umgrenzten Zwischenraumes. Die Haltescheibe 50 besitzt ebenfalls Durchbrüche 52, welche aus Figur 4 erkennbar sind, durch welche Luft in Richtung des Saugraum 16 abgesaugt werden kann. Zur exakten Fixierung des Ventilkörpers 42 am Gehäuseboden 32 ist die Haltescheibe 50 so weit eingepresst, dass ihr zentraler Bereich am Ventilkörper 42 gegenüber des Zapfens 47 anliegt und dadurch den Zapfen 47 in der Aufnahme 48 hält. Zwischen dem geringfügig kegelförmigen Gehäuseboden 42 und der Haltescheibe 50 befindet sich ein genügend großer Freiraum, in welchen die Kappe 44 ausgelenkt werden kann, wenn diese von den Durchbrüchen 40 beim Ansaugen von Luft abgehoben wird.To secure the position of the valve body 42, in particular of the pin 47 in the receptacle 48, is a holding element, in particular a holding plate 50, which is pressed into the space surrounded by the edge 34 gap. The retaining disc 50 thus has a slight oversize relative to the circumference of the space bounded by the edge 34. The holding plate 50 also has openings 52, which can be seen from Figure 4, through which air can be sucked in the direction of the suction chamber 16. For exact fixation of the valve body 42 on the housing bottom 32, the retaining washer 50 is pressed so far that its central region on the valve body 42 bears against the pin 47 and thereby holds the pin 47 in the receptacle 48. Between the slightly conical housing bottom 42 and the retaining plate 50 is a sufficiently large space in which the cap 44 can be deflected when it is lifted from the openings 40 during the intake of air.

[0023] Die einstückige Ausgestaltung des Ventilgehäuses 28 mit einteiligem Gehäusemantel 30 und Gehäuseboden 32 erlaubt eine schnelle und einfache Montage des Ventilkörpers 42, der mit dem Gehäuseboden 32 nicht verrastet ist und lediglich von der Haltescheibe 50 am Gehäuseboden 32 gehalten wird. [0024] The one-piece design of the valve housing 28 with one-piece housing shell 30 and housing bottom 32 allows a quick and easy installation of the valve body 42 which is not latched to the housing bottom 32 and is held only by the retaining plate 50 on the housing bottom 32. [0024]

Claims

Ansprüche claims 1. Vakuumpumpe (12), insbesondere Flügelzellenpumpe, mit einem Pumpengehäuse (10), in welchem ein Saugraum (16) vorgesehen ist, und einem in den Saugraum (16) einmündenden Gehäusedurchbruch (20), wobei im Pumpengehäusedurchbruch (20) ein ins Freie (22) oder in einen externen Unterdruckraum mündendes Saug-Rückschlagventil (24) angeordnet ist, welches in einem topfförmigen Ventilgehäuse (28) untergebracht ist und das topfförmige Ventilgehäuse (28) einen Gehäuseboden (32) und einen Gehäusemantel (30) aufweist, dadurch gekennzeichnet, dass der Gehäuseboden (32) und der Gehäusemantel (30) einstückig ausgebildet sind.1. Vacuum pump (12), in particular vane pump, with a pump housing (10), in which a suction chamber (16) is provided, and a in the suction chamber (16) opening housing opening (20), wherein in the pump housing opening (20) into the open (22) or in an external vacuum chamber opening suction check valve (24) is arranged, which is housed in a pot-shaped valve housing (28) and the cup-shaped valve housing (28) has a housing bottom (32) and a housing shell (30), characterized in that the housing bottom (32) and the housing jacket (30) are integrally formed. 2. Vakuumpumpe nach Anspruch 1 , dadurch gekennzeichnet, dass der Gehäuseboden (32) eine Aufnahme (48) für einen Halteabschnitt (46) eines Ventilkörpers (42) aufweist.2. Vacuum pump according to claim 1, characterized in that the housing bottom (32) has a receptacle (48) for a holding portion (46) of a valve body (42). 3. Vakuumpumpe nach Anspruch 2, dadurch gekennzeichnet, dass die Aufnahme (48) als Durchbruch ausgebildet ist.3. Vacuum pump according to claim 2, characterized in that the receptacle (48) is formed as a breakthrough. 4. Vakuumpumpe nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Aufnahme (48) den Gehäuseboden (32) vollständig durchsetzt.4. Vacuum pump according to claim 2 or 3, characterized in that the receptacle (48) completely passes through the housing bottom (32). 5. Vakuumpumpe nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass die Aufnahme (48) einen hohlzylindrischen, insbesondere einen kreiszylindrischen, Querschnitt aufweist.5. Vacuum pump according to one of claims 2 to 4, characterized in that the receptacle (48) has a hollow cylindrical, in particular a circular cylindrical, cross-section. 6. Vakuumpumpe nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die Aufnahme (48) hinterschneidungsfrei ausgebildet ist.6. Vacuum pump according to one of claims 2 to 5, characterized in that the receptacle (48) is formed without undercuts. 7. Vakuumpumpe nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, dass der Ventilkörper (42) aus einem elastischen, insbesondere gummielastischen, Material oder aus Edelstahl, insbesondere Federstahl besteht.7. Vacuum pump according to one of claims 2 to 6, characterized in that the valve body (42) consists of an elastic, in particular rubber-elastic, material or stainless steel, in particular spring steel. 8. Vakuumpumpe nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass der Halteabschnitt (46) zapfenartig, insbesondere zylinderförmig, ausgebildet ist.8. Vacuum pump according to one of claims 2 to 7, characterized in that the holding portion (46) pin-like, in particular cylindrical, is formed. 9. Vakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Gehäuseboden (32) des topfförmigen Ventilgehäuses (28) einen den Gehäusemantel (30) über den Gehäuseboden (32) hinaus fortsetzenden Rand (34) aufweist und in den vom den Gehäuseboden (32) überragenden Rand (34) gebildeten Zwischenraum eine Haltescheibe (50) eingepresst ist.9. Vacuum pump according to one of the preceding claims, characterized in that the housing bottom (32) of the cup-shaped valve housing (28) has a housing shell (30) on the housing bottom (32) also continuing edge (34) and in the of the Caseback (32) protruding edge (34) formed gap a retaining disk (50) is pressed. 10. Vakuumpumpe nach Anspruch 9, dadurch gekennzeichnet, dass der Ventilkörper (42) zwischen dem Gehäuseboden (32) und der Haltescheibe (50) angeordnet ist.10. Vacuum pump according to claim 9, characterized in that the valve body (42) between the housing bottom (32) and the retaining disc (50) is arranged. 11. Vakuumpumpe nach einem der Ansprüche 2 bis 8 und 9, dadurch gekennzeichnet, dass die Haltescheibe (50) den Halteabschnitt im Gehäuseboden (32) hält.11. Vacuum pump according to one of claims 2 to 8 and 9, characterized in that the retaining disc (50) holds the holding portion in the housing bottom (32). 12. Saug-Rückschlagventil (24) für eine Vakuumpumpe (12) nach einem der vorhergehenden Ansprüche. 12. suction check valve (24) for a vacuum pump (12) according to one of the preceding claims.
PCT/EP2009/059868 2008-11-20 2009-07-30 Vacuum pump Ceased WO2010057690A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/998,678 US20110217200A1 (en) 2008-11-20 2009-07-30 Vacuum pump
EP09781288A EP2347131B1 (en) 2008-11-20 2009-07-30 Vacuum pump
CN2009801461106A CN102216622A (en) 2008-11-20 2009-07-30 Vacuum pump

Applications Claiming Priority (2)

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DE102008059228.5 2008-11-20
DE102008059228A DE102008059228A1 (en) 2008-11-20 2008-11-20 vacuum pump

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WO2010057690A2 true WO2010057690A2 (en) 2010-05-27
WO2010057690A3 WO2010057690A3 (en) 2010-07-15

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US (1) US20110217200A1 (en)
EP (1) EP2347131B1 (en)
CN (1) CN102216622A (en)
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Also Published As

Publication number Publication date
US20110217200A1 (en) 2011-09-08
WO2010057690A3 (en) 2010-07-15
EP2347131A2 (en) 2011-07-27
CN102216622A (en) 2011-10-12
EP2347131B1 (en) 2012-11-28
DE102008059228A1 (en) 2010-05-27

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