EP0541967B1 - Casing cover - Google Patents

Casing cover Download PDF

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Publication number
EP0541967B1
EP0541967B1 EP92117376A EP92117376A EP0541967B1 EP 0541967 B1 EP0541967 B1 EP 0541967B1 EP 92117376 A EP92117376 A EP 92117376A EP 92117376 A EP92117376 A EP 92117376A EP 0541967 B1 EP0541967 B1 EP 0541967B1
Authority
EP
European Patent Office
Prior art keywords
sealing
cover
casing
casing cover
shaft
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.)
Expired - Lifetime
Application number
EP92117376A
Other languages
German (de)
French (fr)
Other versions
EP0541967A1 (en
Inventor
Rainer Dipl.-Ing. Ecker
Bernd Dipl.-Ing. Stephan
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.)
GOETZE ELASTOMERE GMBH
Original Assignee
CR Elastomere 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 CR Elastomere GmbH filed Critical CR Elastomere GmbH
Publication of EP0541967A1 publication Critical patent/EP0541967A1/en
Application granted granted Critical
Publication of EP0541967B1 publication Critical patent/EP0541967B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F11/00—Arrangements of sealings in combustion engines 
    • F02F11/007—Arrangements of sealings in combustion engines  involving rotary applications

Definitions

  • the invention relates to a housing cover for sealing a crankshaft housing of an internal combustion engine with an oil pan which can be flanged from below with the interposition of a soft material seal, the cover being fastened in alignment with the longitudinal axis of the shaft on the outer wall of the housing and a lip sealing ring integrated in the cover sealing the shaft and arranged in the cover flange Sealing strips are in fluid-tight static engagement with both the shaft housing and the oil pan (see, inter alia, US Pat. No. 4,265,495).
  • DE-OS 39 42 448 discloses a housing cover for sealing crankshaft housings with an oil pan that can be flanged from below.
  • the cover has a separate component which can be screwed onto both the oil pan and the crankshaft housing.
  • the component is flexibly connected to the cover by the elastic rubber layer.
  • the housing cover can be attached to the crankshaft housing in alignment with the shaft axis.
  • the separate component can be screwed to the oil pan.
  • An oversize or undersize is compensated for by the elastic layer.
  • the separate component must lie with its lower edge on one level with the lower edge of the crankcase.
  • the oil pan is screwed to the separate component.
  • the intermediate flat gasket cannot follow the offset in the event of an offset between the lower edge of the housing cover and the lower edge of the crankshaft housing, so that there is a leak in this area.
  • the invention has for its object to improve a generic housing cover to the extent that there is a tight connection to the oil pan even in extreme tolerance.
  • the sealing strip corresponding to the flat seal of the oil pan has a radially extending surface that extends obliquely to the sealing plane. In this way it is possible to create a seamless transition when offset occurs.
  • the flat gasket can follow the sloping surface of the sealing strip.
  • the sealing strip has a bevel, viewed in cross section, at an acute angle to the sealing plane.
  • the bevel should preferably be designed as a double-sided ramp, the length of the ramp corresponding approximately to the width of the flat gasket, and the acute angle lying between 5 and 20 degrees.
  • FIG. 3 shows an installation situation of a previous cover as an enlargement of the cutout, which corresponds approximately to the installation situation of the cover according to US Pat. No. 4,265,495.
  • the flat gasket (3) cannot fill this offset, so that a cavity (10) is created in which the medium to be sealed can flow.
  • the intersection point X between the sealing strip (7 ') and the lower edge (9) of the crankshaft housing (2) migrates along the boundary edge of the sealing strip (7') depending on the manufacturing tolerance. As long as the lower edge (9) lies in one plane with the lower edge (8), no oil flows into the cavity (10) and the cover is tight.
  • the surface of the sealing strip (7) is designed as a bevel in the form of a double-sided ramp (11).
  • the acute angle alpha between the sealing plane and the surface of the ramp (11) should be chosen between 5 and 20 degrees, depending on Flat gasket material so that the flat gasket can follow the shape of the surface without creating a cavity.
  • the offset between the lower edge (8) and lower edge (9) can not create a leak
  • the intersection X1 between the sealing strip (7) and lower edge (9) moves along the ramp (11) depending on the manufacturing tolerance, no matter where the Ramp (11) is the intersection point X, there is always tightness.
  • the bevel not as a straight line but as an arc, for example according to a sine function, in order to obtain a softer transition to the flat gasket.

Description

Die Erfindung betrifft einen Gehäuseverschlußdeckel zur Abdichtung eines Kurbelwellengehäuses einer Brennkraftmaschine mit von unten unter Zwischenschaltung einer Weichstoffdichtung anflanschbaren Ölwanne, wobei der Deckel im Einbauzustand fluchtend zur Wellenlängsachse an der Außenwand des Gehäuses befestigt ist und wobei ein im Deckel integrierter Lippendichtungsring die Welle abdichtet und im Deckelflansch angeordnete Dichtstreifen im fluiddichten statischen Eingriff sowohl mit dem Wellengehäuse als auch mit der Ölwanne stehen (siehe u.a. die US-A-4 265 495).The invention relates to a housing cover for sealing a crankshaft housing of an internal combustion engine with an oil pan which can be flanged from below with the interposition of a soft material seal, the cover being fastened in alignment with the longitudinal axis of the shaft on the outer wall of the housing and a lip sealing ring integrated in the cover sealing the shaft and arranged in the cover flange Sealing strips are in fluid-tight static engagement with both the shaft housing and the oil pan (see, inter alia, US Pat. No. 4,265,495).

Die DE-OS 39 42 448 offenbart einen Gehäusedeckel zur Abdichtung von Kurbelwellengehäuse mit von unten anflanschbarer Ölwanne. Zur Ausschaltung von durch Fertigungstoleranzen bedingte Undichtheiten weist der Deckel ein separates Bauteil auf, welches sowohl an die Ölwanne als auch an das Kurbelwellengehäuse anschraubbar ist. Über eine anvulkanisierte Gummizwischenlage besteht eine Verbindung zwischen dem separaten Bauteil und dem restlichen Deckelkörper. Durch die elastische Gummischicht ist das Bauteil nachgiebig mit dem Deckel verbunden. Hierdurch kann der Gehäusedeckel fluchtend zur Wellenachse am Kurbelwellengehäuse befestigt werden. Durch radiales Strecken oder Stauchen, je nach Toleranzlage, kann das separate Bauteil mit der Ölwanne verschraubt werden.DE-OS 39 42 448 discloses a housing cover for sealing crankshaft housings with an oil pan that can be flanged from below. In order to eliminate leaks caused by manufacturing tolerances, the cover has a separate component which can be screwed onto both the oil pan and the crankshaft housing. There is a connection between the separate component and the rest of the cover body via a vulcanized rubber intermediate layer. The component is flexibly connected to the cover by the elastic rubber layer. As a result, the housing cover can be attached to the crankshaft housing in alignment with the shaft axis. By radial stretching or compression, depending on the tolerance, the separate component can be screwed to the oil pan.

Ein Über- oder Untermaß wird durch die elastische Schicht ausgeglichen.An oversize or undersize is compensated for by the elastic layer.

Damit der Deckel auch zur Ölwanne eine dichte Verbindung erzeugt, muß das separate Bauteil mit seiner Unterkante an einer Ebene mit der Kurbelwellengehäuseunterkante liegen. Unter Zwischenschaltung einer Flachdichtung wird die Ölwanne mit dem separaten Bauteil verschraubt. Es hat sich nun aber gezeigt, daß es aufgrund der Fertigungstoleranzen nicht immer möglich ist, die Unterkante des Kurbelwellengehäuses in eine Ebene mit der Unterkante des Gehäuseverschlußdeckels beziehungsweise des separaten Bauteils zu bringen. Die zwischengeschaltete Flachdichtung kann im Falle eines Versatzes zwischen Gehäusedeckelunterkante und Kurbelwellengehäuseunterkante dem Versatz nicht folgen, so daß in diesem Bereich eine Undichtigkeitsstelle gegeben ist.So that the cover also creates a tight connection to the oil pan, the separate component must lie with its lower edge on one level with the lower edge of the crankcase. With the interposition of a flat gasket, the oil pan is screwed to the separate component. However, it has now been shown that, due to the manufacturing tolerances, it is not always possible to bring the lower edge of the crankshaft housing into a plane with the lower edge of the housing sealing cover or the separate component. The intermediate flat gasket cannot follow the offset in the event of an offset between the lower edge of the housing cover and the lower edge of the crankshaft housing, so that there is a leak in this area.

Der Erfindung liegt die Aufgabe zugrunde, einen gattungsgemäßen Gehäuseverschlußdeckel dahingehend zu verbessern, daß auch bei extremen Toleranzlagen eine dichte Verbindung zur Ölwanne besteht.The invention has for its object to improve a generic housing cover to the extent that there is a tight connection to the oil pan even in extreme tolerance.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der mit der Flachdichtung der Ölwanne korrespondierende Dichtstreifen eine radial erstreckende schräg zur Dichtebene verlaufende Oberfläche aufweist. Auf diese Weise ist es möglich, bei auftretendem Versatz einen sprungfreien Übergang zu schaffen. Die Flachdichtung kann der schräg verlaufenden Oberfläche des Dichtstreifens folgen. Zur Erzeugung einer schräg verlaufenden Oberfläche weist der Dichtstreifen im Querschnitt gesehen eine im spitzen Winkel zur Dichtebene verlaufende Abschrägung auf. Vorzugsweise sollte die Abschrägung als doppelseitige Rampe ausgebildet sein, wobei die Länge der Rampe etwa der Breite der Flachdichtung entspricht, und der spitze Winkel zwischen 5 und 20 Grad liegt.This object is achieved in that the sealing strip corresponding to the flat seal of the oil pan has a radially extending surface that extends obliquely to the sealing plane. In this way it is possible to create a seamless transition when offset occurs. The flat gasket can follow the sloping surface of the sealing strip. To produce an oblique surface, the sealing strip has a bevel, viewed in cross section, at an acute angle to the sealing plane. The bevel should preferably be designed as a double-sided ramp, the length of the ramp corresponding approximately to the width of the flat gasket, and the acute angle lying between 5 and 20 degrees.

Die Erfindung ist anhand eines Ausführungsbeispieles in der Zeichnung darbestellt und wird im folgenden näher erläutert. Es zeigen:

  • Figur 1 Perspektivische Ansicht eines erfindungsgemäßen Deckels mit Anbauteile,
  • Figur 2 erfindungsgemäßer Deckel ohne Lippendichtungsring
  • Figur 3 Ausschnittvergrößerung eines bekannten Gehäuseverschlußdeckels
  • Figur 4 Ausschnittvergrößerung eines erfindungsgemäßen Gehäuseverschlußdeckels
Der in der Figur 1 dargestellte Gehäuseverschlußdeckel (1) dient zur Abdichtung eines Kurbelwellengehäuses (2) einer Brennkraftmaschine mit von unten unter Zwischenschaltung einer Flachdichtung (3) anflanschbaren Ölwanne (4). Im Einbauzustand ist der Deckel (1) fluchtend zur Kurbellwele (nicht gezeichnet) am Kurbelwellengehäuse (2) befestigt, dabei dichtet ein im Deckel (1) integrierter Lippendichtungsring (5) die Welle ab. Über im Deckelflansch angeordnete Dichtstreifen (6, 7) (Figur 2) wird eine statische Abdichtung zum Kurbelwellengehäuse (2) und zur Ölwanne (4) erzeugt.The invention is illustrated using an exemplary embodiment in the drawing and is explained in more detail below. Show it:
  • FIG. 1 perspective view of a cover according to the invention with add-on parts,
  • Figure 2 inventive lid without lip seal ring
  • Figure 3 Enlarged section of a known housing closure cover
  • Figure 4 Enlarged section of a housing cover according to the invention
The housing cover (1) shown in FIG. 1 serves to seal a crankshaft housing (2) of an internal combustion engine with an oil pan (4) which can be flanged from below with the interposition of a flat gasket (3). When installed, the The cover (1) is aligned with the crankshaft (not shown) and attached to the crankshaft housing (2). A lip seal ring (5) integrated in the cover (1) seals the shaft. A static seal to the crankshaft housing (2) and to the oil pan (4) is created via sealing strips (6, 7) (FIG. 2) arranged in the cover flange.

In der Figur 3 ist eine Einbausituation eines bisherigen Deckels als Ausschnittvergrößerung dargestellt, die etwa die Einbausituation des Deckels gemäß US-A-4 265 495 entspricht. Zwischen der Unterkante (8) des Deckels (1) und der Unterkante (9) des Kurbelwellengehäuses (2) besteht ein aus der Fertigungstoleranz bedingter Versatz. Diesen Versatz kann die Flachdichtung (3) nicht ausfüllen, so daß ein Hohlraum (10) entsteht, in welchem das abzudichtende Medium fließen kann. Der Schnittpunkt X zwischen dem Dichtstreifen (7') und der Unterkante (9) des Kurbelwellengehäuses (2) wandert entlang der Begrenzungskante des Dichtstreifens (7') je nach Fertigungstoleranz. Solange die Unterkante (9) in einer Ebene mit der Unterkante (8) liegt, fließt kein Öl in den Hohlraum (10) und der Deckel ist dicht.FIG. 3 shows an installation situation of a previous cover as an enlargement of the cutout, which corresponds approximately to the installation situation of the cover according to US Pat. No. 4,265,495. Between the lower edge (8) of the cover (1) and the lower edge (9) of the crankshaft housing (2) there is an offset caused by the manufacturing tolerance. The flat gasket (3) cannot fill this offset, so that a cavity (10) is created in which the medium to be sealed can flow. The intersection point X between the sealing strip (7 ') and the lower edge (9) of the crankshaft housing (2) migrates along the boundary edge of the sealing strip (7') depending on the manufacturing tolerance. As long as the lower edge (9) lies in one plane with the lower edge (8), no oil flows into the cavity (10) and the cover is tight.

Beim erfindungsgemäßen Gehäuseverschlußdeckel (1) (Figur 4) ist die Oberfläche des Dichtstreifens (7) als Abschrägung in Form einer doppelseitigen Rampe (11) ausgebildet. Der spitze Winkel Alpha zwischen der Dichtebene und der Oberfläche der Rampe (11) sollte zwischen 5 und 20 Grad gewählt werden, je nach Flachdichtungsmaterial, so daß die Flachdichtung dem Verlauf der Oberfläche folgen kann, ohne daß ein Hohlraum entsteht. Auf diese Weise kann der Versatz zwischen Unterkante (8) und Unterkante (9) keine undichte Stelle erzeugen, der Schnittpunkt X1 zwischen Dichtstreifen (7) und Unterkante (9) wandert entlang der Rampe (11) je nach Fertigungstoleranz, egal an welcher Stelle der Rampe (11) der Schnittpunkt X liegt, es ist immer Dichtheit gegeben. Denkbar wäre es auch, die Abschrägung nicht als gerade Linie sondern als Bogen, beispielsweise gemäß einer Sinusfunktion, zu gestalten, um so noch einen weicheren Übergang zur Flachdichtung zu erhalten.In the case of the housing closure cover (1) according to the invention (FIG. 4), the surface of the sealing strip (7) is designed as a bevel in the form of a double-sided ramp (11). The acute angle alpha between the sealing plane and the surface of the ramp (11) should be chosen between 5 and 20 degrees, depending on Flat gasket material so that the flat gasket can follow the shape of the surface without creating a cavity. In this way, the offset between the lower edge (8) and lower edge (9) can not create a leak, the intersection X1 between the sealing strip (7) and lower edge (9) moves along the ramp (11) depending on the manufacturing tolerance, no matter where the Ramp (11) is the intersection point X, there is always tightness. It would also be conceivable to design the bevel not as a straight line but as an arc, for example according to a sine function, in order to obtain a softer transition to the flat gasket.

Claims (5)

  1. Casing cover (1) for sealing a crankshaft casing (2) of an internal combustion engine with an oil sump (4), which may be flange-mounted from below with a soft flat seal (3) placed inbetween, said cover (1) being fastened to the outer wall of the casing (2) so as to be flush with the longitudinal axis of the shaft when installed, and a lip sealing ring (5) integrated into the cover sealing the shaft and sealing strips (6, 7) disposed in the cover flange being in liquid-tight, static engagement both with the shaft casing (2) and with the oil sump (4), characterised in that the sealing strip (7) corresponding to the flat seal (3) of the oil sump (4) has a radially extending surface running obliquely to the sealing plane.
  2. Casing cover according to Claim 1, characterised in that, viewed from the front, the sealing stirp (7) has an inclined section (11) extending at an acute angle α to the sealing plane.
  3. Casing cover according to Claims 1 and 2, characterised in that the inclined section (11) is constructed as a double-sided ramp.
  4. Casing cover according to Claim 3, characterised in that the length of the ramp (11) corresponds approximately to the width of the flat seal (3).
  5. Casing cover according to Claims 2 to 4, characterised in that the angle α lies between 5° and 20°.
EP92117376A 1991-11-09 1992-10-12 Casing cover Expired - Lifetime EP0541967B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4136890 1991-11-09
DE4136890A DE4136890C2 (en) 1991-11-09 1991-11-09 Housing cover

Publications (2)

Publication Number Publication Date
EP0541967A1 EP0541967A1 (en) 1993-05-19
EP0541967B1 true EP0541967B1 (en) 1995-09-13

Family

ID=6444420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92117376A Expired - Lifetime EP0541967B1 (en) 1991-11-09 1992-10-12 Casing cover

Country Status (3)

Country Link
EP (1) EP0541967B1 (en)
DE (2) DE4136890C2 (en)
ES (1) ES2077322T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8899463B2 (en) 2010-09-30 2014-12-02 Ethicon Endo-Surgery, Inc. Surgical staple cartridges supporting non-linearly arranged staples and surgical stapling instruments with common staple-forming pockets
US9700310B2 (en) 2013-08-23 2017-07-11 Ethicon Llc Firing member retraction devices for powered surgical instruments

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19722629B4 (en) * 1997-05-30 2006-07-27 Dolmar Gmbh sealing arrangement
CN103670783B (en) * 2012-09-17 2016-11-16 广西玉柴机器股份有限公司 Front oil seal seat of diesel engine
DE102017006355A1 (en) * 2017-06-23 2018-12-27 Mtu Friedrichshafen Gmbh bearing cap
DE102020109576B3 (en) * 2020-04-06 2021-06-24 Grob-Werke Gmbh & Co. Kg Method and device for sealing a test space in a workpiece

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT207625B (en) * 1958-02-19 1960-02-10 Jenbacher Werke Ag Device for sealing cylinder heads in internal combustion engines
US4265495A (en) * 1979-08-20 1981-05-05 Allis-Chalmers Corporation Engine block and crankshaft bearing seal
DE3634735A1 (en) * 1986-10-11 1988-04-21 Goetze Ag LOCKING CAP, ESPECIALLY FOR CRANKSHAFT AND GEARBOX HOUSING IN MOTOR VEHICLES
DE3942448A1 (en) * 1989-08-01 1991-02-07 Daimler Benz Ag Cover plate for crankshaft opening in crankcase - is held in place by clamping strip with elastic intermediate layer
DE4016020C2 (en) * 1990-05-18 1994-06-16 Goetze Ag Housing cover

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8899463B2 (en) 2010-09-30 2014-12-02 Ethicon Endo-Surgery, Inc. Surgical staple cartridges supporting non-linearly arranged staples and surgical stapling instruments with common staple-forming pockets
US9033203B2 (en) 2010-09-30 2015-05-19 Ethicon Endo-Surgery, Inc. Fastening instrument for deploying a fastener system comprising a retention matrix
US9700310B2 (en) 2013-08-23 2017-07-11 Ethicon Llc Firing member retraction devices for powered surgical instruments

Also Published As

Publication number Publication date
EP0541967A1 (en) 1993-05-19
DE59203669D1 (en) 1995-10-19
DE4136890A1 (en) 1993-05-19
ES2077322T3 (en) 1995-11-16
DE4136890C2 (en) 1995-08-03

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