EP0664388B1 - Rocker cover - Google Patents
Rocker cover Download PDFInfo
- 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
Links
- 229920001971 elastomer Polymers 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000000806 elastomer Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 7
- 230000036316 preload Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
Images
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
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
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.
- 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)
- 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).
- Rocker cover according to claim 1, characterised in that the spring body (8) is connected to the rubber sleeves (7).
- Rocker cover according to claim 1 or 2, characterised in that the spring body (8) is formed from steel.
- Rocker cover according to one of claims 1 to 3, characterised in that the spring body (8) is configured as a leaf spring.
- 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).
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)
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)
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. |
-
1994
- 1994-01-21 DE DE4401486A patent/DE4401486C2/en not_active Expired - Fee Related
-
1995
- 1995-01-18 EP EP95100584A patent/EP0664388B1/en not_active Expired - Lifetime
- 1995-01-18 ES ES95100584T patent/ES2114234T3/en not_active Expired - Lifetime
- 1995-01-18 DE DE59501735T patent/DE59501735D1/en not_active Expired - Fee Related
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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