EP3344875A1 - Vakuumpumpe für ein kraftfahrzeug - Google Patents
Vakuumpumpe für ein kraftfahrzeugInfo
- Publication number
- EP3344875A1 EP3344875A1 EP15756934.4A EP15756934A EP3344875A1 EP 3344875 A1 EP3344875 A1 EP 3344875A1 EP 15756934 A EP15756934 A EP 15756934A EP 3344875 A1 EP3344875 A1 EP 3344875A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connecting piece
- vacuum pump
- snap ring
- motor vehicle
- vehicle vacuum
- 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.)
- Withdrawn
Links
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 description 7
- 238000003780 insertion Methods 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 241001233037 catfish Species 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2015/070218 WO2017036548A1 (de) | 2015-09-04 | 2015-09-04 | Vakuumpumpe für ein kraftfahrzeug |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3344875A1 true EP3344875A1 (de) | 2018-07-11 |
Family
ID=54014835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15756934.4A Withdrawn EP3344875A1 (de) | 2015-09-04 | 2015-09-04 | Vakuumpumpe für ein kraftfahrzeug |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3344875A1 (de) |
WO (1) | WO2017036548A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2571970B (en) * | 2018-03-14 | 2020-09-16 | Edwards Tech Vacuum Engineering (Qingdao) Co Ltd | A liquid ring pump manifold with integrated non-return valve |
EP3884187A1 (de) | 2018-11-22 | 2021-09-29 | Pierburg Pump Technology GmbH | Rückschlagventilanordnung und kraftfahrzeugvakuumpumpe |
GB2579791B (en) * | 2018-12-13 | 2021-07-14 | Edwards Ltd | Vacuum pump with variable axial position |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3531926A1 (de) * | 1985-09-07 | 1987-03-19 | Kugelfischer G Schaefer & Co | Loesbare steckverbindung |
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 (de) | 1996-11-28 | 1998-06-04 | Pierburg Ag | Saugleitungs-Anschlußstutzen für eine Vakuumpumpe |
WO1999001691A1 (de) * | 1997-07-02 | 1999-01-14 | Johannes Schäfer vorm. Stettiner Schraubenwerke GmbH & Co. KG | Steckverbindung für rohrleitungen und kombination aus steckverbindung und lösewerkzeug |
DE102010039343B4 (de) * | 2010-08-16 | 2012-06-14 | Joma-Polytec Gmbh | Vakuumpumpe |
-
2015
- 2015-09-04 EP EP15756934.4A patent/EP3344875A1/de not_active Withdrawn
- 2015-09-04 WO PCT/EP2015/070218 patent/WO2017036548A1/de active Application Filing
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2017036548A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2017036548A1 (de) | 2017-03-09 |
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Legal Events
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STAA | Information on the status of an ep patent application or granted ep patent |
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Effective date: 20180117 |
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AK | Designated contracting states |
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AX | Request for extension of the european patent |
Extension state: BA ME |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: DES, ENVER Inventor name: PILENZ, WOLFGANG Inventor name: KUL, EMIN |
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INTG | Intention to grant announced |
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Effective date: 20200918 |