WO2017036548A1 - Vacuum pump for a motor vehicle - Google Patents

Vacuum pump for a motor vehicle Download PDF

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Publication number
WO2017036548A1
WO2017036548A1 PCT/EP2015/070218 EP2015070218W WO2017036548A1 WO 2017036548 A1 WO2017036548 A1 WO 2017036548A1 EP 2015070218 W EP2015070218 W EP 2015070218W WO 2017036548 A1 WO2017036548 A1 WO 2017036548A1
Authority
WO
WIPO (PCT)
Prior art keywords
connecting piece
vacuum pump
snap ring
motor vehicle
vehicle vacuum
Prior art date
Application number
PCT/EP2015/070218
Other languages
German (de)
French (fr)
Inventor
Emin KUL
Enver Des
Wolfgang Pilenz
Original Assignee
Pierburg Pump Technology 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
Application filed by Pierburg Pump Technology Gmbh filed Critical Pierburg Pump Technology Gmbh
Priority to PCT/EP2015/070218 priority Critical patent/WO2017036548A1/en
Priority to EP15756934.4A priority patent/EP3344875A1/en
Publication of WO2017036548A1 publication Critical patent/WO2017036548A1/en

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
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • 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
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/088—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a split elastic ring
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/806—Pipes for fluids; Fittings therefor
    • 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

Definitions

  • the invention relates to a motor vehicle vacuum pump which, in a motor vehicle (motor vehicle), provides a vacuum of absolutely 20-600 mbar for pneumatically operated units, for example for a pneumatic brake master.
  • a vehicular vacuum pump typically consists of one or more housing parts which include a pumping space.
  • a housing part has a Einiasskanal, which opens into a pump chamber inlet opening.
  • a receptacle On the outside of this housing part and upstream of the inlet opening, a receptacle is provided which holds a separate connection piece, which is usually made of plastic.
  • the connecting piece is a kind of adapter, through which the otherwise standardized vacuum pump is adapted to the respective application, and which is currently being used! having a hose nozzle for pushing a hose line end.
  • Object of the invention is to provide in this context, a motor vehicle vacuum pump with a connection piece, which is fixed in a simple manner and reliable on the inclusion of a housing part.
  • a snap ring groove is provided on the outside of the connection piece, and the connection piece holder has on the inside a corresponding snap ring ring groove.
  • a non-closed snap ring which fixes the connection piece in this way axially on the connection piece receiving. Since the snap ring is not closed, it can be radially compressed during assembly, wherein it is biased radially outward, so that it penetrates into this radially outwardly when reaching the transverse plane of the receiving-side annular groove.
  • the snap ring engages in the mounted state of the connecting piece in both annular grooves, so that on this catfish a non-detachable connection is created, which is protected from external influences and external damage.
  • a complex shape, such as a latching tongue, is eliminated.
  • the fixation by a snap ring is insensitive to vibrations. Also a thread is not needed.
  • the compound made in this way with the snap ring is also very compact.
  • the snap ring on the outside on its downstream side on a circumferential chamfer.
  • the snap ring is therefore not rectangular in its ring cross-section, but has a chamfer on its leading edge during assembly outside edge. This chamfer forms a chamfer, which facilitates the assembly, as is pressed radially together by the chamfer when inserting a corresponding wedge effect of the snap ring to be subsequently pushed together to the receiving side annular groove can.
  • the circumferential chamfer seen in cross section, conical, but may also be rounded.
  • the connecting piece on the outside and upstream of its snap ring groove on a sealing ring groove, in which a closed sealing ring sits.
  • the separate sealing ring realizes the fluidic seal. Because the sealing ring upstream of the snap ring is arranged on the outside of the connecting piece, the sealing ring when plugging into the
  • the connecting piece receptacle does not pass through the receiving side sealing ring groove. As a result, the sealing ring is protected during assembly.
  • the spigot has an integral check valve which opens in the inlet direction but closes in the outlet direction. As a result, a return flow is prevented.
  • the check valve has a valve body which rests in the closed position on an annular step of the connecting piece body.
  • the annular step axially adjoins the snap ring annular groove, wherein the valve body moves downstream when opening.
  • the annular step is thus not in the same transverse plane as the snap ring groove, so that an extreme material weakening of Anschiussstutzen body is avoided in this area.
  • connection piece on the outside has a thrust flange, which bears against a preferably annular support surface of the relevant housing part. Due to the butt flange and the corresponding support surface of the connecting piece is additionally fixed axially in the insertion direction.
  • the support flange thus represents an axial stop. In this way, it is avoided that the snap ring having a chamfer must also perform the axial fixation in the insertion direction, which would be structurally problematic in view of the chamfer.
  • connection piece receiving a circumferential chamfer.
  • This opening edge chamfer serves to radially compress the snap ring during assembly while avoiding a separate tool during the insertion movement. In this way, the connection piece can be mounted without tools.
  • an anti-rotation device is provided by which the connecting piece is fixed against rotation on the receptacle.
  • the Anti-rotation can be formed, for example in the form of a nose, which engages in a corresponding recess of the housing part.
  • the housing part made of metal, for example aluminum.
  • the connecting piece body consists of plastic.
  • Figure 1 shows a cross section of a detail of a motor vehicle vacuum pump with a mounted on a receptacle of a housing part connecting piece
  • FIG. 2 shows a longitudinal section through the end region of the connecting piece of FIG. 1.
  • FIG. 1 is a detail of a motor vehicle vacuum pump 10 for supplying a vacuum-operated unit, for example a pneumatic power unit.
  • the vacuum pump 10 has an aluminum housing part 12 which partially encloses a pump chamber 14 or includes and defines.
  • the housing part 12 has an inlet channel 20, which fluidly connects a connection nozzle receptacle 24 with a pump chamber inlet opening 22. Through the inlet channel 20 and the pump chamber inlet opening 22, the sucked air flows into the pump chamber 14, in which a pump rotor, not shown, is arranged.
  • the pump rotor may be mechanically driven by an internal combustion engine or electrically by its own electric motor.
  • the receptacle 24 is essentially formed by a nearly cylindrical or slightly conical bore 25 into which a plug-in portion 34 of a plastic connecting piece 30 angled at approximately 45 ° is inserted.
  • the connecting piece 30 is formed by a one-piece plastic body 31.
  • the longitudinal end of a hose nozzle 36th forms, on which a corresponding hose end can be pushed,
  • a circumferential chamfer 70 is provided, which is conically inclined at approximately 30 ° to the axial.
  • the opening edge chamfer 70 makes it possible to mount the insertion portion 34 of the connecting piece 30 without tools or insert.
  • the insertion portion 34 of the connecting piece 30 is shown in detail.
  • the insertion portion 34 has a check valve 50, which is formed by a spring retaining ring 58, a compression spring 56, a disk-like valve body 52 and an annular step 54, which is the valve seat for the valve body 52.
  • the check valve 50 opens in the inlet direction and closes in the outlet direction.
  • an outside snap ring annular groove 26 connects, in which a non-closed snap ring 29 is seated, which has downstream on its outer side a circumferential chamfer 27.
  • the chamfer 27 is present, seen in cross section, rounded.
  • the snap ring 29 may be made of plastic or metal.
  • the snap ring 29 is in the relaxed state in its outer diameter larger than the outer diameter of the snap ring body 31 in this area. The snap ring 29 is thus biased radially outward, so that it engages in the assembled state, as shown in Figure 1, in a corresponding and radially inwardly open housing-side snap ring annular groove 28.
  • the connecting piece body 31 Upstream of the snap ring 29 and the snap ring groove 26, the connecting piece body 31 on the outside a sealing ring groove 40 in which a closed rubber-elastic sealing ring 42 is seated, the outer diameter in the relaxed state greater than the outer diameter of the snap ring body 31 in this Area is.
  • the connecting piece 30 Upstream of the sealing ring annular groove 40, the connecting piece 30 has on the outside a collar-shaped impact flange 46, which bears against an annular support surface 48 of the receptacle 24 axially.
  • an anti-rotation device 60 is provided, which is presently formed by a nose on the connecting piece 30, which engages in a corresponding recess of the housing part 12 rotatably. This ensures that the connection piece 30 can be mounted on the housing part 12 only in a single rotational position.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Abstract

The invention relates to a vacuum pump (10) for a motor vehicle, comprising a housing part (12) which partially encloses a pump chamber (14), wherein the housing part (12) has an inlet channel (20) that leads into a pump chamber inlet opening (22) and has a receptacle (24) upstream of the inlet opening (22) for a connection piece (30), wherein the connection piece (30) comprises a snap ring annular groove (26) on the outside, and the connection piece holder (24) comprises a corresponding snap ring annular groove (28) on the inside, a non-closed snap ring being seated in the annular grooves (26,28).

Description

VAKUUMPUMPE FÜR EIN KRAFTFAHRZEUG  VACUUM PUMP FOR A MOTOR VEHICLE
Die Erfindung betrifft eine Kfz-Vakuumpumpe, die in einem Kraftfahrzeug (Kfz) Unterdruck von absolut 20-600 mbar für pneumatisch betriebene Aggregate zur Verfügung stellt, beispielsweise für einen pneumatischen B re m s k ra f t ve rstä r ke r. The invention relates to a motor vehicle vacuum pump which, in a motor vehicle (motor vehicle), provides a vacuum of absolutely 20-600 mbar for pneumatically operated units, for example for a pneumatic brake master.
Eine Kfz-Vakuumpumpe besteht typischerweise aus einem oder mehreren Gehäuseteilen, das bzw. die einen Pumpraum einschließen. Ein Gehäuseteil weist einen Einiasskanal auf, der in eine Pumpraum- Einlassöffnung mündet. An der Außenseite dieses Gehäuseteils und stromaufwärts der Einlassöffnung ist eine Aufnahme vorgesehen, die einen separaten Anschlussstutzen hält, der in der Regel aus Kunststoff besteht. Der Anschlussstutzen stellt eine Art Adapter dar, durch den die im Übrigen standardisierte Vakuumpumpe an die jeweilige Applikation angepasst ist, und die in der Rege! einen Schlauchstutzen zum Aufschieben eines Schlauchleitungs-Endes aufweist.  A vehicular vacuum pump typically consists of one or more housing parts which include a pumping space. A housing part has a Einiasskanal, which opens into a pump chamber inlet opening. On the outside of this housing part and upstream of the inlet opening, a receptacle is provided which holds a separate connection piece, which is usually made of plastic. The connecting piece is a kind of adapter, through which the otherwise standardized vacuum pump is adapted to the respective application, and which is currently being used! having a hose nozzle for pushing a hose line end.
Aus DE 196 49 308 AI ist ein Vakuumpumpen-Anschlussstutzen bekannt, der durch eine außenseitige Rastzunge im Bereich der Aufnahme an dem betreffenden Gehäuseteil fixiert ist. Die Verrastung kann sich durch Abbrechen der Rastzunge lösen. Eine alternative Verschraubung könnte sich aufgrund der unvermeidlichen Vibrationen Im Laufe der Zeit lösen,  From DE 196 49 308 Al a vacuum pump connection piece is known, which is fixed by an outside latching tongue in the region of the receptacle on the relevant housing part. The locking can be solved by breaking off the latching tongue. An alternative fitting could loosen over time due to the inevitable vibrations
Aufgabe der Erfindung ist es vor diesem Hintergrund, eine Kfz- Vakuumpumpe mit einem Anschlussstutzen zu schaffen, der auf einfache Weise und zuverlässig an der Aufnahme eines Gehäuseteils fixiert ist. Object of the invention is to provide in this context, a motor vehicle vacuum pump with a connection piece, which is fixed in a simple manner and reliable on the inclusion of a housing part.
Diese Aufgabe wird erfindungsgemäß gelöst durch eine Kfz-Vakuumpumpe mit den Merkmalen des Anspruchs 1. Erfindungsgemäß ist an dem Anschlussstutzen außenseitig eine Sprengring- Ringnut vorgesehen, und weist die Anschlussstutzen- Aufnahme innenseitig eine korrespondierende Sprengring-Ringnut auf. In der Ringnut sitzt ein nicht-geschlossener Sprengring, der den Anschlussstutzen auf diese Weise axial an der Anschlussstutzen-Aufnahme fixiert. Da der Sprengring nicht geschlossen ist, kann er bei der Montage radial zusammengedrückt werden, wobei er radial nach außen vorgespannt ist, so dass er beim Erreichen der Querebene der aufnahmeseitigen Ringnut in diese radial nach außen eindringt. Der Sprengring greift Im montierten Zustand des Anschlussstutzens in beide Ringnuten ein, so dass auf diese Welse eine nicht-lösbare Verbindung geschaffen wird, die vor äußeren Einflüssen und äußerer Beschädigung geschützt ist. Eine komplexe Formgebung, wie beispielsweise bei einer Rastzunge, entfällt. Die Fixierung durch einen Sprengring ist unempfindlich gegenüber Vibrationen. Auch ein Gewinde wird nicht benötigt. Die auf diese Weise mit dem Sprengring hergestellte Verbindung ist ferner sehr kompakt. This object is achieved by a motor vehicle vacuum pump with the features of claim 1. According to the invention, a snap ring groove is provided on the outside of the connection piece, and the connection piece holder has on the inside a corresponding snap ring ring groove. In the annular groove sits a non-closed snap ring, which fixes the connection piece in this way axially on the connection piece receiving. Since the snap ring is not closed, it can be radially compressed during assembly, wherein it is biased radially outward, so that it penetrates into this radially outwardly when reaching the transverse plane of the receiving-side annular groove. The snap ring engages in the mounted state of the connecting piece in both annular grooves, so that on this catfish a non-detachable connection is created, which is protected from external influences and external damage. A complex shape, such as a latching tongue, is eliminated. The fixation by a snap ring is insensitive to vibrations. Also a thread is not needed. The compound made in this way with the snap ring is also very compact.
Vorzugswelse weist der Sprengring außenseitig an seiner stromabwärtigen Seite eine umlaufende Fase auf. Der Sprengring ist also in seinem Ring- Querschnitt nicht rechteckig aufgebaut, sondern weist an seiner bei der Montage vorauseilenden außenseitigen Kante eine Anschrägung auf. Diese Anschrägung bildet eine Fase, die die Montage erleichtert, da durch die Fase beim Einstecken über eine entsprechende Keilwirkung der Sprengring radial zusammengedrückt wird, um anschließend zusammengedrückt bis zu der aufnahmeseitigen Ringnut geschoben werden zu können. Die umlaufende Fase kann, im Querschnitt gesehen, konisch, kann jedoch auch abgerundet ausgebildet sein.  Vorzugswelse, the snap ring on the outside on its downstream side on a circumferential chamfer. The snap ring is therefore not rectangular in its ring cross-section, but has a chamfer on its leading edge during assembly outside edge. This chamfer forms a chamfer, which facilitates the assembly, as is pressed radially together by the chamfer when inserting a corresponding wedge effect of the snap ring to be subsequently pushed together to the receiving side annular groove can. The circumferential chamfer, seen in cross section, conical, but may also be rounded.
Gemäß einer bevorzugten Ausgestaltung weist der Anschlussstutzen außenseitig und stromaufwärts seiner Sprengring-Ringnut eine Dichtring- Ringnut auf, in der ein geschlossener Dichtring sitzt. Durch den separaten Dichtring wird die fluidische Abdichtung realisiert. Da der Dichtring stromaufwärts des Sprengrings an der Außenseite des Anschlussstutzens angeordnet ist, muss der Dichtring beim Einstecken in dieAccording to a preferred embodiment, the connecting piece on the outside and upstream of its snap ring groove on a sealing ring groove, in which a closed sealing ring sits. The separate sealing ring realizes the fluidic seal. Because the sealing ring upstream of the snap ring is arranged on the outside of the connecting piece, the sealing ring when plugging into the
Anschlussstutzen-Aufnahme nicht die aufnahmeseitige Dichtring-Ringnut passieren. Hierdurch wird der Dichtring bei der Montage geschont. The connecting piece receptacle does not pass through the receiving side sealing ring groove. As a result, the sealing ring is protected during assembly.
Vorzugsweise weist der Anschlussstutzen ein integriertes Rückschlagventil auf, das in Einlassrichtung öffnet, jedoch in Auslassrichtung schließt. Hierdurch wird eine RückStrömung verhindert.  Preferably, the spigot has an integral check valve which opens in the inlet direction but closes in the outlet direction. As a result, a return flow is prevented.
Vorzugsweise weist das Rückschlagventil einen Ventilkörper auf, der in der Schließposition an einer Ringstufe des Anschlussstutzen-Körpers anliegt. Die Ringstufe grenzt axial an die Sprengring-Ringnut an, wobei sich der Ventilkörper beim Öffnen stromabwärts bewegt. Die Ringstufe liegt also nicht in derselben Querebene wie die Sprengring-Ringnut, so dass eine extreme Materialschwächung des Anschiussstutzen-Körpers in diesem Bereich vermieden wird.  Preferably, the check valve has a valve body which rests in the closed position on an annular step of the connecting piece body. The annular step axially adjoins the snap ring annular groove, wherein the valve body moves downstream when opening. The annular step is thus not in the same transverse plane as the snap ring groove, so that an extreme material weakening of Anschiussstutzen body is avoided in this area.
Vorzugsweise weist der Anschlussstutzen außenseitig einen Stoßflansch auf, der an einer bevorzugt ringförmigen Stützfläche des betreffenden Gehäuseteils anliegt. Durch den Stoßflansch und die korrespondierende Stützfläche ist der Anschlussstutzen zusätzlich axial in Einsteckrichtung fixiert. Der Stützflansch stellt also einen axialen Anschlag dar. Auf diese Weise wird vermieden, dass der eine Fase aufweisende Sprengring auch die axiale Fixierung in Einsteckrichtung leisten muss, was angesichts der Fase konstruktiv problematisch wäre.  Preferably, the connection piece on the outside has a thrust flange, which bears against a preferably annular support surface of the relevant housing part. Due to the butt flange and the corresponding support surface of the connecting piece is additionally fixed axially in the insertion direction. The support flange thus represents an axial stop. In this way, it is avoided that the snap ring having a chamfer must also perform the axial fixation in the insertion direction, which would be structurally problematic in view of the chamfer.
Vorzugsweise weist der Öffnungsrand der Anschlussstutzen-Aufnahme eine umlaufende Fase auf. Diese Öffnungsrand-Fase dient dazu, den Sprengring bei der Montage unter Vermeidung eines separaten Werkzeugs bei der Einsteckbewegung radial zusammenzudrücken. Auf diese Weise kann der Anschlussstutzen werkzeuglos montiert werden.  Preferably, the opening edge of the connection piece receiving a circumferential chamfer. This opening edge chamfer serves to radially compress the snap ring during assembly while avoiding a separate tool during the insertion movement. In this way, the connection piece can be mounted without tools.
Vorzugsweise ist eine Verdrehsicherung vorgesehen, durch die der Anschlussstutzen drehfest an der Aufnahme fixiert ist. Die Verdrehsicherung kann beispielsweise in Form einer Nase ausgebildet sein, die in eine entsprechende Ausnehmung des Gehäuseteils eingreift. Preferably, an anti-rotation device is provided by which the connecting piece is fixed against rotation on the receptacle. The Anti-rotation can be formed, for example in the form of a nose, which engages in a corresponding recess of the housing part.
Vorzugsweise besteht das Gehäuseteil aus Metall, beispielsweise aus Aluminium. Besonders bevorzugt besteht der Anschlussstutzen-Körper aus Kunststoff.  Preferably, the housing part made of metal, for example aluminum. Particularly preferably, the connecting piece body consists of plastic.
Im Folgenden wird unter Bezugnahme auf die Zeichnungen ein Ausführungsbeispief der Erfindung näher erläutert. Es zeigen:  In the following an embodiment of the invention will be explained in more detail with reference to the drawings. Show it:
Figur 1 einen Querschnitt eines Ausschnittes einer Kfz-Vakuumpumpe mit einem an einer Aufnahme eines Gehäuseteils montierten Anschlussstutzen, und  Figure 1 shows a cross section of a detail of a motor vehicle vacuum pump with a mounted on a receptacle of a housing part connecting piece, and
Figur 2 einen Längsschnitt durch den Endbereich des Anschlussstutzens der Figur 1.  FIG. 2 shows a longitudinal section through the end region of the connecting piece of FIG. 1.
In der Figur 1 ist ausschnittsweise eine Kfz-Vakuumpumpe 10 zur Versorgung eines vakuumbetriebenen Aggregats, beispielsweise eines pneumatischen B re m s kraft ve rstä rke rs, dargestellt- Die Vakuumpumpe 10 weist ein Aluminium-Gehäuseteil 12 auf, das einen Pumpraum 14 teilweise einschließt bzw. umfasst und definiert. Das Gehäuseteil 12 weist einen Einlasskanai 20 auf, der eine Anschlussstutzen-Aufnahme 24 fluidisch mit einer Pumpraum-Einlassöffnung 22 verbindet. Durch den Einlasskanal 20 und die Pumpraum-Einlassöffnung 22 strömt die angesaugte Luft in den Pumpraum 14, in dem ein nicht dargestellter Pumpenrotor angeordnet ist. Der Pumpenrotor kann mechanisch durch einen Verbrennungsmotor oder elektrisch durch einen eigenen Elektromotor angetrieben sein.  FIG. 1 is a detail of a motor vehicle vacuum pump 10 for supplying a vacuum-operated unit, for example a pneumatic power unit. The vacuum pump 10 has an aluminum housing part 12 which partially encloses a pump chamber 14 or includes and defines. The housing part 12 has an inlet channel 20, which fluidly connects a connection nozzle receptacle 24 with a pump chamber inlet opening 22. Through the inlet channel 20 and the pump chamber inlet opening 22, the sucked air flows into the pump chamber 14, in which a pump rotor, not shown, is arranged. The pump rotor may be mechanically driven by an internal combustion engine or electrically by its own electric motor.
Die Aufnahme 24 wird im Wesentlichen gebildet von einer nahezu zylindrischen oder leicht konischen Bohrung 25, in die ein Einsteckabschnitt 34 eines mit ungefähr 45° abgewinkelten Kunststoff- Anschlussstutzens 30 eingesteckt ist. Der Anschlussstutzen 30 wird von einem einstückigen Kunststoff- Körper 31 gebildet. An den Einsteckabschnitt 34 schließt sich der in 45° abgewinkelte Stutzenabschnitt 32 an, dessen Längsende einen Schlauchstutzen 36 bildet, auf den ein korrespondierendes Schlauchende aufgeschoben werden kann, The receptacle 24 is essentially formed by a nearly cylindrical or slightly conical bore 25 into which a plug-in portion 34 of a plastic connecting piece 30 angled at approximately 45 ° is inserted. The connecting piece 30 is formed by a one-piece plastic body 31. At the insertion portion 34 is followed by the angled at 45 ° nozzle portion 32, the longitudinal end of a hose nozzle 36th forms, on which a corresponding hose end can be pushed,
An dem Öffnungsrand der Anschlussstutzen-Aufnahme 24 ist eine umlaufende Fase 70 vorgesehen, die in ungefähr 30° zur Axialen konisch geneigt ist. Die Öffnungsrand-Fase 70 ermöglicht es, den Einsteckabschnitt 34 des Anschlussstutzens 30 werkzeuglos zu montieren bzw. einzustecken.  At the opening edge of the connecting piece receptacle 24, a circumferential chamfer 70 is provided, which is conically inclined at approximately 30 ° to the axial. The opening edge chamfer 70 makes it possible to mount the insertion portion 34 of the connecting piece 30 without tools or insert.
In der Figur 2 ist der Einsteckabschnitt 34 des Anschlussstutzens 30 im Detail dargestellt. An seinem Längsende weist der Einsteckabschnitt 34 ein Rückschlagventil 50 auf, dass von einem Federhaltering 58, einer Druckfeder 56, einem scheibenartigen Ventilkörper 52 und einer Ringstufe 54 gebildet wird, die den Ventilsitz für den Ventilkörper 52 darstellt. Das Rückschlagventil 50 öffnet in Einlassrichtung und schließt in Auslassrichtung.  In the figure 2, the insertion portion 34 of the connecting piece 30 is shown in detail. At its longitudinal end, the insertion portion 34 has a check valve 50, which is formed by a spring retaining ring 58, a compression spring 56, a disk-like valve body 52 and an annular step 54, which is the valve seat for the valve body 52. The check valve 50 opens in the inlet direction and closes in the outlet direction.
Stromaufwärts des Rückschlagventils 50 schließt sich eine außenseitige Sprengring-Ringnut 26 an, in der ein nicht-geschlossener Sprengring 29 sitzt, der an seiner Außenseite stromabwärts eine umlaufende Fase 27 aufweist. Die Fase 27 ist vorliegend, im Querschnitt gesehen, abgerundet ausgebildet. Der Sprengring 29 kann aus Kunststoff oder aus Metall bestehen. Der Sprengring 29 ist im entspannten Zustand in seinem Außendurchmesser größer als der Außendurchmesser des Sprengring- Körpers 31 in diesem Bereich ist. Der Sprengring 29 ist also nach radial außen vorgespannt, so dass er im montierten Zustand, wie in Figur 1 dargestellt, in eine korrespondierende und nach radial innen offene gehäuseseitige Sprengring-Ringnut 28 eingreift.  Upstream of the check valve 50, an outside snap ring annular groove 26 connects, in which a non-closed snap ring 29 is seated, which has downstream on its outer side a circumferential chamfer 27. The chamfer 27 is present, seen in cross section, rounded. The snap ring 29 may be made of plastic or metal. The snap ring 29 is in the relaxed state in its outer diameter larger than the outer diameter of the snap ring body 31 in this area. The snap ring 29 is thus biased radially outward, so that it engages in the assembled state, as shown in Figure 1, in a corresponding and radially inwardly open housing-side snap ring annular groove 28.
Stromaufwärts des Sprengrings 29 bzw. der Sprengring-Ringnut 26 weist der Anschlussstutzen-Körper 31 außenseitig eine Dichtring-Ringnut 40 auf, in der ein geschlossener gummielastischer Dichtring 42 sitzt, dessen Außendurchmesser im entspannten Zustand größer als der Außendurchmesser des Sprengring-Körpers 31 in diesem Bereich ist. Stromaufwärts der Dichtring-Ringnut 40 weist der Anschlussstutzen 30 außenseitig einen kragenförmigen Stoßflansch 46 auf, der an einer ringförmigen Stützfläche 48 der Aufnahme 24 axial anliegt. Upstream of the snap ring 29 and the snap ring groove 26, the connecting piece body 31 on the outside a sealing ring groove 40 in which a closed rubber-elastic sealing ring 42 is seated, the outer diameter in the relaxed state greater than the outer diameter of the snap ring body 31 in this Area is. Upstream of the sealing ring annular groove 40, the connecting piece 30 has on the outside a collar-shaped impact flange 46, which bears against an annular support surface 48 of the receptacle 24 axially.
Es ist eine Verdrehsicherung 60 vorgesehen, die vorliegend durch eine Nase an dem Anschlussstutzen 30 gebildet wird, die in eine entsprechende Ausnehmung des Gehäuseteils 12 drehfest eingreift. Hierdurch wird sichergestellt, dass der Anschlussstutzen 30 nur in einer einzigen Drehposition an dem Gehäuseteil 12 montiert werden kann.  There is an anti-rotation device 60 is provided, which is presently formed by a nose on the connecting piece 30, which engages in a corresponding recess of the housing part 12 rotatably. This ensures that the connection piece 30 can be mounted on the housing part 12 only in a single rotational position.

Claims

A N S P R Ü C H E
1. Kfz-Vakuumpumpe (10) mit einem Gehäuseteil (12), das einen1. A vehicle vacuum pump (10) with a housing part (12) having a
Pumpraum (14) teilweise einschließt, wobei das Gehäuseteil (12) einen Einlasskanal (20) aufweist, der in eine Pumpraum- Einfassöffnung (22) mündet und stromaufwärts der Einlassöffnung (22) eine Aufnahme (24) für einen Anschlussstutzen (30) aufweist, wobei Pump housing (14) partially encloses, wherein the housing part (12) has an inlet channel (20) which opens into a pumping space-containing opening (22) and upstream of the inlet opening (22) has a receptacle (24) for a connecting piece (30), in which
der Anschlussstutzen (30) außenseitig eine Sprengring-Ringnut (26) und die Anschlussstutzen-Aufnahme (24) innenseitig eine korrespondierende Sprengring-Ringnut (28) aufweist, und  the connecting piece (30) on the outside a snap ring annular groove (26) and the connecting piece receiving means (24) inside a corresponding snap ring groove (28), and
ein nicht-geschlossener Sprengring (29) in den Ringnuten (26,28) sitzt.  a non-closed snap ring (29) in the annular grooves (26,28) sits.
2. Kfz-Vakuumpumpe (10) nach Anspruch 1, wobei der Sprengring (29) außenseitig stromabwärts eine umlaufende Fase (27) aufweist. 2. motor vehicle vacuum pump (10) according to claim 1, wherein the snap ring (29) on the outside downstream a circumferential chamfer (27).
3. Kfz-Vakuumpumpe (10) nach Anspruch 1 oder 2, wobei der Anschlussstutzen (30) stromaufwärts seiner Sprengring-Ringnut (26) eine Dichtring-Ringnut (40) aufweist, in der ein geschlossener Dichtring (42) sitzt. 3. A motor vehicle vacuum pump (10) according to claim 1 or 2, wherein the connecting piece (30) upstream of its snap ring groove (26) has a sealing ring groove (40) in which a closed sealing ring (42) sits.
4. Kfz-Vakuumpumpe (10) nach einem der vorangegangenen Ansprüche, wobei der Anschlussstutzen (30) ein integriertes Rückschlagventil (50) aufweist. 4. Motor vehicle vacuum pump (10) according to one of the preceding claims, wherein the connecting piece (30) has an integrated check valve (50).
5. Kfz-Vakuumpumpe ( 10) nach einem der vorangegangenen Ansprüche, wobei das Rückschlagventil (50) einen Ventilkörper (52) aufweist, der in der Schließposition an einer Ringstufe (54) des Anschlussstutzen-Körpers (32) anliegt, wobei die Ringstufe (54) an die Sprengring-Ringnut (34) axial angrenzt und der Ventilkörper (52) sich stromabwärts öffnend bewegt. 5. A motor vehicle vacuum pump (10) according to any one of the preceding claims, wherein the check valve (50) has a valve body (52) which abuts in the closed position on an annular step (54) of the connecting piece body (32), wherein the annular step ( 54) axially adjacent to the snap ring groove (34) and the valve body (52) moves downstream opening.
6. Kfz-Vaku um pumpe (10) nach einem der vorangegangenen Ansprüche, wobei der Anschlussstutzen (30) außenseitig einen Stoßflansch (46) aufweist, der an einer Stützfläche (48) anliegt, die bevorzugt ringförmig ausgebildet ist. 6. automotive vacuum pump to (10) according to any one of the preceding claims, wherein the connecting piece (30) on the outside a Stoßflansch (46) which bears against a support surface (48), which is preferably annular.
7. Kfz-Vaku um pumpe ( 10) nach einem der vorangegangenen Ansprüche, wobei der Öffnungsrand der Anschlussstutzen-Aufnahme (24) eine umlaufende Fase (70) aufweist. 7. automotive vacuum pump to (10) according to any one of the preceding claims, wherein the opening edge of the connecting piece receiving means (24) has a circumferential chamfer (70).
8. Kfz-Vakuumpumpe ( 10) nach einem der vorangegangenen Ansprüche, wobei eine Verdrehsicherung (60) vorgesehen ist, durch die der Anschlussstutzen (30) dreh fest an der Aufnahme (24) fixiert ist. 8. A motor vehicle vacuum pump (10) according to any one of the preceding claims, wherein an anti-rotation device (60) is provided, through which the connecting piece (30) fixedly fixed to the receptacle (24).
9. Kfz-Vakuumpumpe (10) nach einem der vorangegangenen Ansprüche, wobei das Gehäuseteii (12) aus Metall und der Anschlussstutzen- Körper (31) aus Kunststoff besteht. 9. A motor vehicle vacuum pump (10) according to any one of the preceding claims, wherein the Gehäuseteii (12) made of metal and the connecting piece body (31) consists of plastic.
PCT/EP2015/070218 2015-09-04 2015-09-04 Vacuum pump for a motor vehicle WO2017036548A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2015/070218 WO2017036548A1 (en) 2015-09-04 2015-09-04 Vacuum pump for a motor vehicle
EP15756934.4A EP3344875A1 (en) 2015-09-04 2015-09-04 Vacuum pump for a motor vehicle

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Application Number Priority Date Filing Date Title
PCT/EP2015/070218 WO2017036548A1 (en) 2015-09-04 2015-09-04 Vacuum pump for a motor vehicle

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020104034A1 (en) 2018-11-22 2020-05-28 Pierburg Pump Technology Gmbh Check valve arrangement and motor vehicle vacuum pump
GB2579791A (en) * 2018-12-13 2020-07-08 Edwards Ltd Vacuum pump
EP3765740A4 (en) * 2018-03-14 2021-12-01 Edwards Technologies Vacuum Engineering (Qingdao) Co Ltd A liquid ring pump manifold

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725081A (en) * 1985-09-07 1988-02-16 Fag Kugelfischer Georg Schafer (Kgaa) Detachable plug assembly
US5350203A (en) * 1991-09-10 1994-09-27 Bundy Corporation Quick connect tubing connector and method of assembly
DE19649308A1 (en) 1996-11-28 1998-06-04 Pierburg Ag Suction line connection for vacuum pump
US5853204A (en) * 1995-07-17 1998-12-29 Proprietary Technology, Inc. Means of coupling non-threaded connections
WO1999001691A1 (en) * 1997-07-02 1999-01-14 Johannes Schäfer vorm. Stettiner Schraubenwerke GmbH & Co. KG Pipe connection and combination of a connection and a detaching tool
DE102010039343A1 (en) * 2010-08-16 2012-02-16 Joma-Polytec Gmbh vacuum pump

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725081A (en) * 1985-09-07 1988-02-16 Fag Kugelfischer Georg Schafer (Kgaa) Detachable plug assembly
US5350203A (en) * 1991-09-10 1994-09-27 Bundy Corporation Quick connect tubing connector and method of assembly
US5853204A (en) * 1995-07-17 1998-12-29 Proprietary Technology, Inc. Means of coupling non-threaded connections
DE19649308A1 (en) 1996-11-28 1998-06-04 Pierburg Ag Suction line connection for vacuum pump
WO1999001691A1 (en) * 1997-07-02 1999-01-14 Johannes Schäfer vorm. Stettiner Schraubenwerke GmbH & Co. KG Pipe connection and combination of a connection and a detaching tool
DE102010039343A1 (en) * 2010-08-16 2012-02-16 Joma-Polytec Gmbh vacuum pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3765740A4 (en) * 2018-03-14 2021-12-01 Edwards Technologies Vacuum Engineering (Qingdao) Co Ltd A liquid ring pump manifold
WO2020104034A1 (en) 2018-11-22 2020-05-28 Pierburg Pump Technology Gmbh Check valve arrangement and motor vehicle vacuum pump
GB2579791A (en) * 2018-12-13 2020-07-08 Edwards Ltd Vacuum pump
GB2579791B (en) * 2018-12-13 2021-07-14 Edwards Ltd Vacuum pump with variable axial position

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