EP0664388B1 - Rocker cover - Google Patents

Rocker cover Download PDF

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Publication number
EP0664388B1
EP0664388B1 EP95100584A EP95100584A EP0664388B1 EP 0664388 B1 EP0664388 B1 EP 0664388B1 EP 95100584 A EP95100584 A EP 95100584A EP 95100584 A EP95100584 A EP 95100584A EP 0664388 B1 EP0664388 B1 EP 0664388B1
Authority
EP
European Patent Office
Prior art keywords
rocker cover
spring body
motor unit
rocker
cover according
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
EP95100584A
Other languages
German (de)
French (fr)
Other versions
EP0664388A1 (en
Inventor
Bernd Dipl.-Ing. Stephan
Bernhard Dipl.-Ing. Feldmann
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.)
SKF Sealing Solutions 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 EP0664388A1 publication Critical patent/EP0664388A1/en
Application granted granted Critical
Publication of EP0664388B1 publication Critical patent/EP0664388B1/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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • 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 

Definitions

  • the invention relates to a housing cover according to the preamble of claim 1.
  • EP 0 268 200 B1 discloses a generic valve cover for the Cylinder head of an internal combustion engine.
  • the lid has holes in its bottom for carrying out threaded bolts designed as stud bolts. In the Holes extend through rubber sleeves. On the one hand, these are used for sealing the stud and on the other hand they dampen the transmission of structure-borne noise.
  • threaded bolts designed as stud bolts. In the Holes extend through rubber sleeves. On the one hand, these are used for sealing the stud and on the other hand they dampen the transmission of structure-borne noise.
  • the rubber sleeves act as rubber springs and ensure that one sufficient sealing is generated.
  • the invention has for its object a generic housing cover to improve with regard to the sealing effect of the seal on the edge of the lid.
  • the spring body When tightening the fastening screws or nuts, a defined one can be used Preload is generated, the spring body is so with the Rubber sleeve connected so that the fastening screw is on the spring body axially supported.
  • the spring body should preferably consist of steel.
  • the spring body as a leaf spring.
  • Other spring bodies which are formed, for example, from spring band steel, could also be used reach.
  • the spring body should be at least in the range Contact points with the cover have a sound-absorbing pad.
  • FIG. 1 shows a housing cover (1) in the form of a valve cover for Internal combustion engines.
  • the housing cover (1) is made of aluminum.
  • For Sealing of the cylinder head (2) is an elastomer seal on the edge of the cover (3) (4) arranged.
  • Rubber sleeves (7) which are attached to the cover (1), are used to seal the stud bolts. are connected.
  • the rubber sleeves (7) can be vulcanized in or pressed in.
  • a spring body (8) made of steel strip is form-fitting with the Rubber sleeve (7) connected.
  • the spring body (8) is supported on the metal surface (9) of the cover (1).
  • the spring body (8) When tightening the nut (10) of the stud (6) the spring body (8) axially pressed and thus generates a biasing force on the Seal (4).
  • the spring body (8) Since the spring body (8) is made of metal, the contact pressure remains largely over a long period of time and over a wide temperature range constant. In contrast to the rubber sleeve (7), no aging occurs. In addition, this spring body (8) can flow / set the seal (4) compensate. A sound attenuation can be found on the underside of the spring body (8) thin sound-absorbing layer (11) can be applied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Motor Or Generator Frames (AREA)
  • Bolts, Nuts, And Washers (AREA)

Description

Die Erfindung betrifft einen Gehäusedeckel gemäß Oberbegriff des Anspruchs 1.The invention relates to a housing cover according to the preamble of claim 1.

Die EP 0 268 200 B1 offenbart einen gattungsgemäßen Ventildeckel für den Zylinderkopf eines Verbrennungsmotors. Der Deckel hat in seinem Boden Löcher zur Durchführung von als Stehbolzen ausgebildeten Gewindebolzen. In den Löchern erstrecken sich Gummihülsen. Diese dienen zum einen zur Abdichtung der Stehbolzen und zum anderen bewirken sie eine Dämpfung bei der Übertragung von Körperschall. Beim Abziehen der Muttern auf den Gewindebolzen wird darüber hinaus eine definierte Vorspannkraft in den Gummihülsen erzeugt, so daß die Dichtung am Deckelrand mit einer bestimmten Kraft am Motorblock verpreßt wird. Die Gummihülsen fungieren als Gummifedern und sorgen dafür, daß eine hinreichende Abdichtung erzeugt wird.EP 0 268 200 B1 discloses a generic valve cover for the Cylinder head of an internal combustion engine. The lid has holes in its bottom for carrying out threaded bolts designed as stud bolts. In the Holes extend through rubber sleeves. On the one hand, these are used for sealing the stud and on the other hand they dampen the transmission of structure-borne noise. When removing the nuts on the threaded bolt also generates a defined preload in the rubber sleeves, so that the seal on the edge of the cover is pressed with a certain force on the engine block becomes. The rubber sleeves act as rubber springs and ensure that one sufficient sealing is generated.

Es hat sich nun gezeigt, daß bei einigen Anwendungsfällen die Gummi federkraft nicht ausreicht für eine hinreichende Dichtpressung in der Dichtung. Auch mit zunehmender Betriebszeit läßt die Kraft in den Gummifedern nach, wodurch die Dichtwirkung der Dichtung am Deckelrand nachläßt.It has now been shown that the rubber spring force in some applications not sufficient for sufficient sealing pressure in the seal. Also with increasing operating time, the force in the rubber springs decreases, causing the Sealing effect of the seal on the edge of the lid deteriorates.

Der Erfindung liegt die Aufgabe zugrunde, einen gattungsgemäßen Gehäusedeckel im Hinblick auf die Dichtwirkung der Dichtung am Deckelrand zu verbessern. The invention has for its object a generic housing cover to improve with regard to the sealing effect of the seal on the edge of the lid.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zur Einstellung der Vorspannkraft ein metallischer Federkörper vorgesehen ist, gemäß dem kennzeichen des Anspruchs 1. Auf diese Weise wird eine Federwirkung erzielt, die über die gesamte Betriebszeit eine ausreichende Vorspannkraft erzeugt.This object is achieved in that the adjustment of Preload is provided a metallic spring body, according to the characterizing part of claim 1. In this way achieves a spring effect that is sufficient over the entire operating time Preload generated.

Beim Anziehen der Befestigungsschrauben oder Muttern kann eine definierte Vorspannkraft erzeugt werden, dabei ist der Federkörper derart mit der Gummihülse verbunden, daß die Befestigungsschraube sich auf dem Federkörper axial abstützt.When tightening the fastening screws or nuts, a defined one can be used Preload is generated, the spring body is so with the Rubber sleeve connected so that the fastening screw is on the spring body axially supported.

Es ist von Vorteil, wenn die Gummihülsen mit dem Federkörper verbunden sind, da auf diese Weise die Montage erleichtert wird. Der Federkörper sollte vorzugsweise aus Stahl bestehen.It is advantageous if the rubber sleeves are connected to the spring body, as this makes assembly easier. The spring body should preferably consist of steel.

Denkbar wäre, den Federkörper als Blattfeder auszubilden. Andere Federkörper, die beispielsweise aus Federbandstahl gebildet sind, könnten auch zur Anwendung gelangen.It would be conceivable to design the spring body as a leaf spring. Other spring bodies, which are formed, for example, from spring band steel, could also be used reach.

Damit eine ausreichende Schalldämpfung während des Betriebes der Brennkraftmaschine gegeben ist, sollte der Federkörper mindestens im Bereich der Berührstellen mit dem Deckel eine schalldämpfende Auflage besitzen.So that adequate sound absorption during the operation of the Internal combustion engine is given, the spring body should be at least in the range Contact points with the cover have a sound-absorbing pad.

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

Figur 1:
Ausschnitt eines erfindungsgemäßen Gehäusedeckels.
The invention is illustrated in the drawing using an exemplary embodiment and is explained in more detail below. It shows:
Figure 1:
Section of a housing cover according to the invention.

Die Figur 1 zeigt einen Gehäusedeckel (1) in Form eines Ventildeckels für Brennkraftmaschinen. Der Gehäusedeckel (1) besteht aus Aluminium. Zur Abdichtung des Zylinderkopfes (2) ist am Deckelrand (3) eine Elastomerdichtung (4) angeordnet. Um die Dichtung (4) mit definierter Vorspannung auf die Dichtfläche des Zylinderkopfes (2) pressen zu können, sind, über den Umfang verteilt, mehrere Löcher (5) angeordnet, durch die sich Stehbolzen (6) erstrecken. Zur Abdichtung der Stehbolzen dienen Gummihülsen (7), die mit dem Deckel (1) verbunden sind. Die Gummihülsen (7) können einvulkanisiert oder eingepreßt sein. Ein aus Stahlband gefertigter Federkörper (8) ist formschlüssig mit der Gummihülse (7) verbunden. Der Federkörper (8) stützt sich auf der Metallfläche (9) des Deckels (1) ab. Beim Anziehen der Mutter (10) des Stehbolzens (6) wird der Federkörper (8) axial verpreßt und erzeugt somit eine Vorspannkraft an die Dichtung (4). Da der Federkörper (8) aus Metall gebildet ist, bleibt die Anpreßkraft über einen langen Zeitraum und über ein breites Temperaturspektrum weitgehend konstant. Im Gegensatz zur Gummihülse (7) tritt keine Alterung auf. Darüberhinaus kann dieser Federkörper (8) ein Fließen/Setzen der Dichtung (4) ausgleichen. Zur Schalldämpfung kann auf der Unterseite des Federkörpers (8) eine dünne schalldämpfende Schicht (11) aufgetragen sein.Figure 1 shows a housing cover (1) in the form of a valve cover for Internal combustion engines. The housing cover (1) is made of aluminum. For Sealing of the cylinder head (2) is an elastomer seal on the edge of the cover (3) (4) arranged. To the seal (4) with a defined preload on the To be able to press the sealing surface of the cylinder head (2) over the circumference distributed, several holes (5) arranged through which stud bolts (6) extend. Rubber sleeves (7), which are attached to the cover (1), are used to seal the stud bolts. are connected. The rubber sleeves (7) can be vulcanized in or pressed in. A spring body (8) made of steel strip is form-fitting with the Rubber sleeve (7) connected. The spring body (8) is supported on the metal surface (9) of the cover (1). When tightening the nut (10) of the stud (6) the spring body (8) axially pressed and thus generates a biasing force on the Seal (4). Since the spring body (8) is made of metal, the contact pressure remains largely over a long period of time and over a wide temperature range constant. In contrast to the rubber sleeve (7), no aging occurs. In addition, this spring body (8) can flow / set the seal (4) compensate. A sound attenuation can be found on the underside of the spring body (8) thin sound-absorbing layer (11) can be applied.

Claims (5)

  1. Rocker cover, especially an oil pan or a valve cover to be fastened to the motor unit of a combustion engine so as to be detachable yet impermeable to liquid, with an elastomer seal (4) attached to the edge of the rocker cover (1) facing the motor unit, and with holes (5) provided in the region of the base of the rocker cover to take fastening screws (6) to connect the rocker cover (1) to the motor unit, the holes (5) for the fastening screws (6) being provided with rubber sleeves (7) in order to produce an adequate pretensioning force on the elastomer seal (4) characterised in that, to adjust the pretensioning force, a metallic spring body (8), supported on the metal surface (9) forming the base of the rocker cover (1), is provided respectively on an axial stop surface of a fastening screw (6).
  2. Rocker cover according to claim 1, characterised in that the spring body (8) is connected to the rubber sleeves (7).
  3. Rocker cover according to claim 1 or 2, characterised in that the spring body (8) is formed from steel.
  4. Rocker cover according to one of claims 1 to 3, characterised in that the spring body (8) is configured as a leaf spring.
  5. Rocker cover according to one of claims 1 to 4, characterised in that the spring body (8) has a sound-deadening layer (11) at least in the region of its points of contact with the metal surface (9) of the rocker cover (1).
EP95100584A 1994-01-21 1995-01-18 Rocker cover Expired - Lifetime EP0664388B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4401486A DE4401486C2 (en) 1994-01-21 1994-01-21 Housing cover
DE4401486 1994-01-21

Publications (2)

Publication Number Publication Date
EP0664388A1 EP0664388A1 (en) 1995-07-26
EP0664388B1 true EP0664388B1 (en) 1998-04-01

Family

ID=6508251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95100584A Expired - Lifetime EP0664388B1 (en) 1994-01-21 1995-01-18 Rocker cover

Country Status (3)

Country Link
EP (1) EP0664388B1 (en)
DE (2) DE4401486C2 (en)
ES (1) ES2114234T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29612020U1 (en) * 1996-07-10 1996-10-02 Kunststofftechnik F.u.H. Riesselmann GmbH, 01458 Ottendorf-Okrilla Thermoplastic plastic component, in particular cylinder head cover for engines
DE10141569B4 (en) 2001-08-24 2004-09-02 Federal-Mogul Sealing Systems Bretten Gmbh & Co. Kg Housing cover with acoustically decoupled stop
DE10141570B4 (en) * 2001-08-24 2004-09-02 Federal-Mogul Sealing Systems Bretten Gmbh & Co. Kg Housing cover with device for securing the sealing forces
DE202008004036U1 (en) * 2008-03-20 2009-08-06 Mann+Hummel Gmbh Oil pan for an internal combustion engine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115268A (en) * 1962-08-10 1963-12-24 Genova Andrew De Valve tappet cover hold-down
US4456268A (en) * 1982-09-30 1984-06-26 Allis-Chalmers Corp. Fastening means in sealed gasket assembly including shoulder bolt
US4571133A (en) * 1984-07-23 1986-02-18 General Motors Corporation Loading washer assembly
DE3639218A1 (en) * 1986-11-15 1988-05-26 Karl Joh Gummiwarenfab VALVE COVER FOR THE COMBUSTION ENGINE CYLINDER HEAD
ES2077318T3 (en) * 1991-12-17 1995-11-16 Cr Elastomere Gmbh COVER FOR INTERNAL COMBUSTION ENGINES.

Also Published As

Publication number Publication date
ES2114234T3 (en) 1998-05-16
EP0664388A1 (en) 1995-07-26
DE4401486C2 (en) 1997-09-04
DE4401486A1 (en) 1995-07-27
DE59501735D1 (en) 1998-05-07

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