EP2464871B1 - Vacuum pump - Google Patents

Vacuum pump Download PDF

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Publication number
EP2464871B1
EP2464871B1 EP10732368.5A EP10732368A EP2464871B1 EP 2464871 B1 EP2464871 B1 EP 2464871B1 EP 10732368 A EP10732368 A EP 10732368A EP 2464871 B1 EP2464871 B1 EP 2464871B1
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EP
European Patent Office
Prior art keywords
bore
vacuum pump
end section
pump according
section
Prior art date
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Active
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EP10732368.5A
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German (de)
French (fr)
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EP2464871A2 (en
Inventor
Willi Schneider
Bernd Hess
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Joma Polytec GmbH
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Joma Polytec GmbH
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Publication of EP2464871A2 publication Critical patent/EP2464871A2/en
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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
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/023—Lubricant distribution through a hollow driving shaft
    • 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
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • 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
    • F04C2240/60—Shafts
    • 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
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps

Definitions

  • the invention relates to a vacuum pump with a cup-shaped housing, a rotor rotatably mounted eccentrically in the housing and a housing cover closing the pot-shaped housing, wherein the rotor has a rotor shaft which passes through the cup-shaped housing and through which the rotor is driven.
  • Vacuum pumps of such a construction are known. They usually have a housing made of metal, in which a rotor is rotatably supported by its rotor shaft and in which the work spaces are formed. The pump chamber is sealed to the atmosphere by pressurized oil lubrication.
  • the rotor shaft is rotated, for example, by the engine of a motor vehicle, in particular by its camshaft.
  • the supply of the vacuum pump with lubricating oil via the rotor shaft, which is provided for this purpose with an axial bore.
  • the drive In order to allow the lubricating oil to be introduced into the rotor shaft, the drive must be connected to the rotor shaft and in particular to the bore by a suitable means.
  • the document EP0199984 is the closest prior art.
  • the invention is therefore based on the object to provide a vacuum pump that can be easily connected reliably with an external oil supply.
  • This nipple is the link between the rotor shaft and drive, or external lubricating oil supply.
  • the connection nipple is designed so that it is a plug connection. A simple and automatable assembly is thereby ensured.
  • the nipple is made of plastic, in particular of an elastomer or a soft elastic thermoplastic. As a result, an axial offset and an angular offset can be compensated in a simple manner.
  • connection nipple has at least one peripheral bead on its proximal side engaging in the free end section of the bore. If the connection nipple is inserted into the free end portion of the bore, then the circumferential bead engages in the inner circumferential groove. The connection nipple is thus securely held.
  • a peripheral bead has a semicircular and a circumferential bead has a trapezoidal cross section.
  • the semicircular in cross-section circumferential bead serves to seal the connection nipple in the bore and the trapezoidal in cross-section codessswulst is axially arranged outside, wherein the cross-section decreases radially outward.
  • This peripheral bead is configured substantially frusto-conical and advantageously engages behind a step of the stepped bore.
  • connection nipple In order to ensure a defined installation of the connection nipple on the front side of the end portion of the bore, the connection nipple has a circumferential stop collar. In addition, a fluid-tight storage in the line of the lubricating oil supply is made possible by the fact that the connection nipple has a circumferential bead at its end section which is distal to the rotor shaft.
  • connection nipple distal end portion of the connection nipple has a larger diameter than the proximal end portion.
  • An optimal distribution of the lubricating oil in the vacuum pump is achieved in that the bore is a blind hole and at the bottom of the bore a transverse bore is provided.
  • FIG. 1 shows a longitudinal section through a generally designated 10 vacuum pump whose housing 12 is closed by a housing cover 14.
  • a rotor 16 is rotatably mounted, the rotor shaft 18, the bottom 20 of the housing 12 passes through.
  • a coupling 24 which connects a drive 26, for example a camshaft, with the rotor shaft 18.
  • FIG. 2 shows the section II in an enlarged view and it can be clearly seen that the rotor shaft 18 has an axial bore 28.
  • This bore 28 serves to supply lubricating oil, which is distributed via a transverse bore 30 in the housing 12.
  • the bore 28 has an end portion 32 which is designed in a stepped manner. From the inside to the outside, a first inner circumferential groove 34 is followed by a first step 36, a second inner circumferential groove 38, a second step 40 and a frusto-conical widening end 42.
  • the proximal end portion 44 of a fitting nipple 46 is seated in the FIGS. 3 and 4 is shown enlarged.
  • the distal end portion 48 is inserted in a bore 50 through which lubricating oil is supplied.
  • the connecting nipple 46 has approximately at its center a stop collar 52, which comes into abutment with the nipple 46 inserted into the rotor shaft 18 at the end face 22 thereof. In this position of the connecting nipple 46 engages a first circumferential bead 54 in the first Circumferential groove 34 and behind the first stage 36, whereby the connection nipple 46 is held in the bore 28. On the proximal end portion 44 is still a second circumferential bead 56 which engages in the second circumferential groove 38.
  • the second circumferential groove 38 has a larger radius than the semi-circular in cross-section second peripheral bead 56, so that a substantially linear and thus fluid-tight system is achieved.
  • the cross section of the first circumferential bead 54 is trapezoidal, which facilitates insertion of the connecting nipple 46 into the bore 28.
  • the easy insertion is also by the frustoconical-flared end 42 of the bore 28.
  • the second circumferential bead 56 may also abut a cylindrical portion of the bore 28.
  • the distal end portion 48 of the nipple 46 has a third peripheral bead 58 which abuts the inner peripheral surface of the bore 50 and provides a fluid-tight connection. From the FIGS. 3 and 4 It can also be seen that the diameter of the proximal end portion 44 is smaller than the diameter of the distal end portion 48.
  • connection nipple 46 made of soft elastic thermoplastic or an elastomer can smooth out connection errors of the drive 26 over a long period of time or over a large number of movement cycles. These connection errors are e.g. an axial offset 60 and / or an angular error 62.
  • the axial offset 60 can be up to 1 mm and the angular error 62 up to 0.5 °.
  • Another advantage of the connecting nipple 48 according to the invention is the damping property.

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

Description

Die Erfindung betrifft eine Vakuumpumpe mit einem topfförmigen Gehäuse, einem exzentrisch im Gehäuse drehbar gelagerten Rotor und einem das topfförmige Gehäuse verschließenden Gehäusedeckel, wobei der Rotor eine Rotorwelle aufweist, die das topfförmige Gehäuse durchgreift und über die der Rotor angetrieben wird.The invention relates to a vacuum pump with a cup-shaped housing, a rotor rotatably mounted eccentrically in the housing and a housing cover closing the pot-shaped housing, wherein the rotor has a rotor shaft which passes through the cup-shaped housing and through which the rotor is driven.

Vakuumpumpen mit einem derartigen Aufbau sind bekannt. Sie weisen in der Regel ein aus Metall bestehendes Gehäuse auf, in welchem ein Rotor über seine Rotorwelle drehbar gelagert ist und in welchem die Arbeitsräume gebildet werden. Die Abdichtung des Pumpenraums zur Atmosphäre erfolgt durch Druckölschmierung. Die Rotorwelle wird zum Beispiel vom Motor eines Kraftfahrzeugs, insbesondere von dessen Nockenwelle, in Drehung versetzt. Die Versorgung der Vakuumpumpe mit Schmieröl erfolgt über die Rotorwelle, die hierfür mit einer axialen Bohrung versehen ist. Um ein Einleiten des Schmieröls in die Rotorwelle zu ermöglichen, muss der Antrieb über ein geeignetes Mittel mit der Rotorwelle und insbesondere mit der Bohrung verbunden werden. Das Dokument EP0199984 ist der nächstliegende Stand der Technik.Vacuum pumps of such a construction are known. They usually have a housing made of metal, in which a rotor is rotatably supported by its rotor shaft and in which the work spaces are formed. The pump chamber is sealed to the atmosphere by pressurized oil lubrication. The rotor shaft is rotated, for example, by the engine of a motor vehicle, in particular by its camshaft. The supply of the vacuum pump with lubricating oil via the rotor shaft, which is provided for this purpose with an axial bore. In order to allow the lubricating oil to be introduced into the rotor shaft, the drive must be connected to the rotor shaft and in particular to the bore by a suitable means. The document EP0199984 is the closest prior art.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vakuumpumpe bereit zu stellen, die auf einfache Weise zuverlässig mit einer externen Ölversorgung verbunden werden kann..The invention is therefore based on the object to provide a vacuum pump that can be easily connected reliably with an external oil supply.

Diese Aufgabe wird mit einer Vakuumpumpe der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass im freien Endabschnitt der Bohrung der Rotorwelle ein Anschlussnippel sitzt.This object is achieved with a vacuum pump of the type mentioned in the present invention that sits in the free end portion of the bore of the rotor shaft, a connection nipple.

Dieser Anschlussnippel ist das Verbindungsglied zwischen Rotorwelle und Antrieb, bzw. externer Schmierölversorgung. Der Anschlussnippel ist so gestaltet, dass er ein Steckanschluss ist. Eine einfache und automatisierbare Montage wird hierdurch gewährleistet.This nipple is the link between the rotor shaft and drive, or external lubricating oil supply. The connection nipple is designed so that it is a plug connection. A simple and automatable assembly is thereby ensured.

Der Anschlussnippel besteht aus Kunststoff, insbesondere aus einem Elastomer oder einem weichelastischen Thermoplast. Dadurch kann auf einfach Weise ein Achsversatz und ein Winkelversatz ausgeglichen werden.The nipple is made of plastic, in particular of an elastomer or a soft elastic thermoplastic. As a result, an axial offset and an angular offset can be compensated in a simple manner.

Der freie Endabschnitt der Bohrung wird von einer sich im Durchmesser verengenden Stufenbohrung gebildet und weist der freie Endabschnitt der Bohrung eine Innenumfangsnut auf. Außerdem weist der Anschlussnippel an seiner in den freien Endabschnitt der Bohrung eingreifenden proximalen Seite wenigstens einen Umfangswulst auf. Wird der Anschlussnippel in den freien Endabschnitt der Bohrung eingesetzt, dann greift die Umfangswulst in die Innenumfangsnut ein. Der Anschlussnippel wird somit sicher gehalten.The free end section of the hole is from a in the Diameter narrowing stepped bore formed and has the free end portion of the bore on an inner circumferential groove. In addition, the connection nipple has at least one peripheral bead on its proximal side engaging in the free end section of the bore. If the connection nipple is inserted into the free end portion of the bore, then the circumferential bead engages in the inner circumferential groove. The connection nipple is thus securely held.

Um den Anschlussnippel einfach in den freien Endabschnitt der Bohrung einsetzen zu können, weist ein Umfangswulst einen halbkreisförmigen und ein Umfangswulst einen trapezförmigen Querschnitt aufweist. Der im Querschnitt halbkreisförmige Umfangswulst dient zur Abdichtung des Anschlussnippels in der Bohrung und der im Querschnitt trapezförmige Umfangswulst ist axial außen angeordnet, wobei dessen Querschnitt sich nach radial außen verkleinert. Dieser Umfangswulst ist im wesentlichen kegelstumpfförmig ausgestaltet und hintergreift vorteilhaft eine Stufe der stufenförmigen Bohrung.In order to be able to easily insert the connection nipple into the free end section of the bore, a peripheral bead has a semicircular and a circumferential bead has a trapezoidal cross section. The semicircular in cross-section circumferential bead serves to seal the connection nipple in the bore and the trapezoidal in cross-section Umfangsswulst is axially arranged outside, wherein the cross-section decreases radially outward. This peripheral bead is configured substantially frusto-conical and advantageously engages behind a step of the stepped bore.

Um eine definierte Anlage des Anschlussnippels an der Stirnseite des Endabschnitts der Bohrung zu gewährleisten, weist der Anschlussnippel einen umlaufenden Anschlagbund auf. Außerdem wird eine fluiddichte Lagerung in der Leitung der Schmierölversorgung dadurch ermöglicht, dass der Anschlussnippel an seinem zur Rotorwelle distalen Endabschnitt einen Umfangswulst aufweist.In order to ensure a defined installation of the connection nipple on the front side of the end portion of the bore, the connection nipple has a circumferential stop collar. In addition, a fluid-tight storage in the line of the lubricating oil supply is made possible by the fact that the connection nipple has a circumferential bead at its end section which is distal to the rotor shaft.

Ein falsches Einsetzen des Anschlussnippels in die Rotorwelle wird dadurch verhindert, dass der zur Rotorwelle distale Endabschnitt des Anschlussnippel einen größeren Durchmesser aufweist als der proximale Endabschnitt.Incorrect insertion of the connection nipple into the rotor shaft is prevented in that the rotor shaft distal end portion of the connection nipple has a larger diameter than the proximal end portion.

Eine optimale Verteilung des Schmieröls in der Vakuumpumpe wird dadurch erzielt, dass die Bohrung eine Sacklochbohrung ist und am Grund der Bohrung eine Querbohrung vorgesehen ist.An optimal distribution of the lubricating oil in the vacuum pump is achieved in that the bore is a blind hole and at the bottom of the bore a transverse bore is provided.

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 with reference to the drawing a particularly preferred Embodiment is described in detail. 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.

In der Zeichnung zeigen:

  • Figur 1 einen Längsschnitt durch eine Vakuumpumpe mit angedeutetem Antrieb;
  • Figur 2 eine vergrößerte Darstellung des Ausschnitts II gemäß Figur 1;
  • Figur 3 eine Seitenansicht des Anschlussnippels; und
  • Figur 4 einen Längsschnitt IV-IV durch den Anschlussnippel gemäß Figur 3.
In the drawing show:
  • FIG. 1 a longitudinal section through a vacuum pump with indicated drive;
  • FIG. 2 an enlarged view of the section II according to FIG. 1 ;
  • FIG. 3 a side view of the connection nipple; and
  • FIG. 4 a longitudinal section IV-IV through the nipple according to FIG. 3 ,

Die Figur 1 zeigt einen Längsschnitt durch eine insgesamt mit 10 bezeichnete Vakuumpumpe, deren Gehäuse 12 von einem Gehäusedeckel 14 verschlossen ist. Im Gehäuse 12 ist unter anderem ein Rotor 16 drehbar gelagert, dessen Rotorwelle 18 den Boden 20 des Gehäuses 12 durchgreift. An der Stirnseite 22 der Rotorwelle 18 liegt eine Kupplung 24 an, die einen Antrieb 26, z.B. eine Nockenwelle, mit der Rotorwelle 18 verbindet.The FIG. 1 shows a longitudinal section through a generally designated 10 vacuum pump whose housing 12 is closed by a housing cover 14. In the housing 12, inter alia, a rotor 16 is rotatably mounted, the rotor shaft 18, the bottom 20 of the housing 12 passes through. On the end face 22 of the rotor shaft 18 is located on a coupling 24 which connects a drive 26, for example a camshaft, with the rotor shaft 18.

Die Figur 2 zeigt den Ausschnitt II in vergrößerter Wiedergabe und es ist deutlich erkennbar, dass die Rotorwelle 18 eine axiale Bohrung 28 aufweist. Diese Bohrung 28 dient zur Zuleitung von Schmieröl, welches über eine Querbohrung 30 im Gehäuse 12 verteilt wird. Die Bohrung 28 besitzt einen Endabschnitt 32, der stufenförmig ausgestaltet ist. Von innen nach außen folgen einer ersten Innenumfangsnut 34 eine erste Stufe 36, eine zweite Innenumfangsnut 38, eine zweite Stufe 40 und ein sich kegelstumpfförmig erweiterndes Ende 42. In diesem Endabschnitt sitzt der proximale Endabschnitt 44 eines Anschlussnippels 46, der in den Figuren 3 und 4 vergrößert dargestellt ist. Der distale Endabschnitt 48 steckt in einer Bohrung 50, über welche Schmieröl zugeleitet wird.The FIG. 2 shows the section II in an enlarged view and it can be clearly seen that the rotor shaft 18 has an axial bore 28. This bore 28 serves to supply lubricating oil, which is distributed via a transverse bore 30 in the housing 12. The bore 28 has an end portion 32 which is designed in a stepped manner. From the inside to the outside, a first inner circumferential groove 34 is followed by a first step 36, a second inner circumferential groove 38, a second step 40 and a frusto-conical widening end 42. In this end section, the proximal end portion 44 of a fitting nipple 46 is seated in the FIGS. 3 and 4 is shown enlarged. The distal end portion 48 is inserted in a bore 50 through which lubricating oil is supplied.

Der Anschlussnippel 46 weist in etwa seiner Mitte einen Anschlagbund 52 auf, der bei in die Rotorwelle 18 eingesetztem Anschlussnippel 46 an dessen Stirnseite 22 zur Anlage kommt. In dieser Position des Anschlussnippels 46 greift eine erste Umfangswulst 54 in die erste Umfangsnut 34 und hinter die erste Stufe 36, wodurch der Anschlussnippel 46 in der Bohrung 28 festgehalten wird. Auf dem proximalen Endabschnitt 44 befindet sich noch ein zweiter Umfangswulst 56, der in die 2. Umfangsnut 38 greift. Die zweite Umfangsnut 38 weist einen größeren Radius auf, als der im Querschnitt halbkreisförmige zweite Umfangswulst 56, so dass eine im wesentlichen linienförmige und somit fluiddichte Anlage erzielt wird. Der Querschnitt der ersten Umfangswulst 54 ist trapezförmig, wodurch ein Einführen des Anschlussnippels 46 in die Bohrung 28 erleichtert wird. Das leichte Einführen wird auch durch das sich kegelstumpfförmig-erweiternde Ende 42 der Bohrung 28. Der zweite Umfangswulst 56 kann auch an einem zylinderförmigen Abschnitt der Bohrung 28 anliegen.The connecting nipple 46 has approximately at its center a stop collar 52, which comes into abutment with the nipple 46 inserted into the rotor shaft 18 at the end face 22 thereof. In this position of the connecting nipple 46 engages a first circumferential bead 54 in the first Circumferential groove 34 and behind the first stage 36, whereby the connection nipple 46 is held in the bore 28. On the proximal end portion 44 is still a second circumferential bead 56 which engages in the second circumferential groove 38. The second circumferential groove 38 has a larger radius than the semi-circular in cross-section second peripheral bead 56, so that a substantially linear and thus fluid-tight system is achieved. The cross section of the first circumferential bead 54 is trapezoidal, which facilitates insertion of the connecting nipple 46 into the bore 28. The easy insertion is also by the frustoconical-flared end 42 of the bore 28. The second circumferential bead 56 may also abut a cylindrical portion of the bore 28.

Der distale Endabschnitt 48 des Anschlussnippels 46 besitzt einen dritten Umfangswulst 58, der an der Innenumfangsfläche der Bohrung 50 anliegt und hier für einen fluiddichte Verbindung sorgt. Aus den Figuren 3 und 4 ist noch erkennbar, dass der Durchmesser des proximalen Endabschnittes 44 kleiner ist, als der Durchmesser des distalen Endabschnittes 48.The distal end portion 48 of the nipple 46 has a third peripheral bead 58 which abuts the inner peripheral surface of the bore 50 and provides a fluid-tight connection. From the FIGS. 3 and 4 It can also be seen that the diameter of the proximal end portion 44 is smaller than the diameter of the distal end portion 48.

Ein aus weichelastischem Thermoplast oder einem Elastomer bestehender Anschlussnippel 46 kann problemlos und über einen langen Zeitraum bzw. über eine Vielzahl von Bewegungszyklen Anschlussfehler des Antriebs 26 ausgleichen. Diese Anschlussfehler sind z.B. ein Achsversatz 60 und/oder ein Winkelfehler 62. Der Achsversatz 60 kann bis zu 1 mm betragen und der Winkelfehler 62 bis zu 0,5°. Ein weiterer Vorteil des erfindungsgemäßen Anschlussnippels 48 ist die Dämpfungseigenschaft. Außerdem bedarf es keiner zusätzlichen Dichtungselemente, wie O-Ringe oder dergleichen, da diese Dichtfunktion von den Umfangswulsten 54, 56 und 58 übernommen wird.A connection nipple 46 made of soft elastic thermoplastic or an elastomer can smooth out connection errors of the drive 26 over a long period of time or over a large number of movement cycles. These connection errors are e.g. an axial offset 60 and / or an angular error 62. The axial offset 60 can be up to 1 mm and the angular error 62 up to 0.5 °. Another advantage of the connecting nipple 48 according to the invention is the damping property. In addition, there is no need for additional sealing elements, such as O-rings or the like, since this sealing function is taken over by the circumferential beads 54, 56 and 58.

Claims (9)

  1. Vacuum pump (10) with a cup-shaped housing (12), a rotor (16) eccentrically mounted rotatable in the housing (12) and a housing cover (14) closing the cup-shaped housing (12), wherein the rotor (16) has a rotor shaft (18) which extends through the cup-shaped housing (12) and by means of which the rotor (16) is driven by an external drive (26), wherein the rotor shaft (18) is provided with a bore (28) for supplying a lubricant, characterised in that a connection nipple (46) made of plastics material is arranged at the free end section (32) of the bore (28), wherein the free end section (32) of the bore (28) has at least one internal peripheral groove (34, 38) and the connection nipple (46) has, at the proximal end section (44) thereof engaging in the free end section (32) of the bore (28), at least one peripheral bead (54, 56) so that, with the connection nipple (46) inserted into the free end section (32) of the bore (28), a peripheral bead (54, 56) engages in the internal peripheral groove (34, 38).
  2. Vacuum pump according to claim 1, characterised in that the plastics material is an elastomer or a soft elastic thermoplastics material.
  3. Vacuum pump according to one of the preceding claims, characterised in that the free end section (32) of the bore (28) constitutes a stepped bore of reducing diameter.
  4. Vacuum pump according to one of the preceding claims, characterised in that one peripheral bead (56, 58) has a semicircular cross-section and one peripheral bead (54) has a trapezium-shaped cross-section.
  5. Vacuum pump according to claim 4, characterised in that the peripheral bead (54) with the trapezium-shaped cross-section is arranged axially externally and the cross-section thereof reduces radially outwardly.
  6. Vacuum pump according to one of the preceding claims, characterised in that the connection nipple (46) has a peripheral stop collar (52).
  7. Vacuum pump according to one of the preceding claims, characterised in that the connection nipple (46) has a peripheral bead (58) on the end section (48) distal from the rotor shaft (16).
  8. Vacuum pump according to one of the preceding claims, characterised in that the end section (48) of the connection nipple (46) distal from the rotor shaft (16) has a larger diameter than the proximal end section (44).
  9. Vacuum pump according to one of the preceding claims, characterised in that the bore (28) is a blind bore and that a transverse bore (30) is provided at the bottom of the bore (28).
EP10732368.5A 2009-08-12 2010-07-14 Vacuum pump Active EP2464871B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009038132.5A DE102009038132B4 (en) 2009-08-12 2009-08-12 vacuum pump
PCT/EP2010/060133 WO2011018294A2 (en) 2009-08-12 2010-07-14 Vacuum pump

Publications (2)

Publication Number Publication Date
EP2464871A2 EP2464871A2 (en) 2012-06-20
EP2464871B1 true EP2464871B1 (en) 2014-05-21

Family

ID=43448363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10732368.5A Active EP2464871B1 (en) 2009-08-12 2010-07-14 Vacuum pump

Country Status (5)

Country Link
US (1) US8794942B2 (en)
EP (1) EP2464871B1 (en)
CN (1) CN102472279A (en)
DE (1) DE102009038132B4 (en)
WO (1) WO2011018294A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018102393A1 (en) * 2018-02-02 2019-08-08 J.D. Neuhaus Holding Gmbh & Co. Kg vane motor

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199984B1 (en) 1985-03-29 1989-11-15 B a r m a g AG Rotary vane vacuum pump
US4635972A (en) * 1985-05-13 1987-01-13 R. W. Lyall & Company, Inc. Plastic pipe coupling apparatus and method of using same
DE8908863U1 (en) * 1989-07-21 1989-09-21 Pierburg Gmbh, 4040 Neuss, De
DE9410508U1 (en) * 1994-06-01 1994-08-25 Rattay Hans Hose connector
US6106030A (en) * 1998-02-23 2000-08-22 Ford Motor Co. Tubular coupling
JP2004028323A (en) 2002-05-01 2004-01-29 Hidesaburo Ishii Joint main body device for pipe joint, and joint annular member to be used for joint main body device
JP2004092504A (en) 2002-08-30 2004-03-25 Toyoda Mach Works Ltd Vane type vacuum pump
JP2004263690A (en) * 2003-02-13 2004-09-24 Aisan Ind Co Ltd Vane type vacuum pump
JP4733356B2 (en) 2004-03-10 2011-07-27 トヨタ自動車株式会社 Vane pump for gas and operation method thereof
FR2886696B1 (en) 2005-06-03 2007-08-31 Renault Sas DEVICE FOR COUPLING A VACUUM PUMP WITH A CAMSHAFT COMPRISING LUBRICANT FLUID FEED MEANS
GB0607198D0 (en) * 2006-04-10 2006-05-17 Wabco Automotive Uk Ltd Improved vacuum pump
DE102007010729B3 (en) 2007-01-04 2008-04-24 Joma-Polytec Kunststofftechnik Gmbh Vacuum pump for use in engine of motor vehicle, has sealing body flexibly designed and fixed at air discharge opening at front and rear ends of opening in rotation direction of rotor, where body lies permanently at opening

Also Published As

Publication number Publication date
DE102009038132B4 (en) 2015-12-24
EP2464871A2 (en) 2012-06-20
US20120141313A1 (en) 2012-06-07
WO2011018294A2 (en) 2011-02-17
US8794942B2 (en) 2014-08-05
CN102472279A (en) 2012-05-23
WO2011018294A3 (en) 2012-02-23
DE102009038132A1 (en) 2011-02-17

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