EP2228520B1 - Locking screw for openings in motor vehicle engines and housing unit of a motor vehicle engine - Google Patents

Locking screw for openings in motor vehicle engines and housing unit of a motor vehicle engine Download PDF

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Publication number
EP2228520B1
EP2228520B1 EP10155343.6A EP10155343A EP2228520B1 EP 2228520 B1 EP2228520 B1 EP 2228520B1 EP 10155343 A EP10155343 A EP 10155343A EP 2228520 B1 EP2228520 B1 EP 2228520B1
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EP
European Patent Office
Prior art keywords
housing unit
latch
screw head
screw
groove
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.)
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Application number
EP10155343.6A
Other languages
German (de)
French (fr)
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EP2228520B8 (en
EP2228520A3 (en
EP2228520A2 (en
Inventor
Daniel Sinn
Jorge Soares
Hans Janssen
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.)
Polytec Plastics Germany GmbH and Co KG
Original Assignee
Polytec Plastics Germany GmbH and Co KG
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.)
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Publication date
Application filed by Polytec Plastics Germany GmbH and Co KG filed Critical Polytec Plastics Germany GmbH and Co KG
Priority to PL10155343T priority Critical patent/PL2228520T3/en
Publication of EP2228520A2 publication Critical patent/EP2228520A2/en
Publication of EP2228520A3 publication Critical patent/EP2228520A3/en
Application granted granted Critical
Publication of EP2228520B1 publication Critical patent/EP2228520B1/en
Publication of EP2228520B8 publication Critical patent/EP2228520B8/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/04—Filling or draining lubricant of or from machines or engines
    • F01M11/0408—Sump drainage devices, e.g. valves, plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/04—Filling or draining lubricant of or from machines or engines
    • F01M11/0408—Sump drainage devices, e.g. valves, plugs
    • F01M2011/0416—Plugs

Definitions

  • the invention relates to a housing unit of a motor vehicle engine such as an oil housing or an oil pan with an opening in a housing wall, in which a screw plug is arranged.
  • EP 1 147 992 is a plug for openings on motor vehicle engines known. This one has a threaded Screw shank, which is connected to a screw head. At the screw head first locking elements are provided, which cooperate with arranged on the housing second locking elements.
  • the object of the invention is to provide a housing unit with an opening in which a screw plug is arranged, which is inexpensive to produce and reusable.
  • the housing unit according to the invention has an opening for a closure screw, which is particularly suitable for closing oil drain openings.
  • the locking screw has a screw shaft with a thread.
  • a screw head is connected to the screw shaft.
  • a first latching element is connected, which cooperates with a second latching element arranged on the opening.
  • the first latching element is designed such that it is elastically resiliently connected to the screw head.
  • At least the locking element is made of thermoplastic material to realize the required resilient connection with the screw head.
  • a holding element which carries the latching element and is connected to the screw head is also produced from the same material.
  • the screw head in particular the entire screw plug made of thermoplastic material.
  • the material is in particular polyamide PA, PPA or PPS or other engineering plastics, which are possibly reinforced with glass fibers suitable.
  • the first latching element connected to the locking screw is connected to the screw head via a retaining element connected.
  • the connection of the holding element is formed with the screw head such that in this way an elastically resilient connection is realized.
  • the connection between the retaining element and the screw head depending on the material used be relatively thin, so that when closing or opening the screw plug, the deflection of the first locking element takes place due to a movement or elastic bending of the retaining element.
  • a movement groove or a movement slot to be provided between the first latching element, in particular the holding element carrying the first latching element, and the screw head.
  • the holding element is connected laterally next to the groove or slot end with the screw head.
  • a connection is provided at each end of the groove or the slot.
  • the elastically resilient movement is preferably realized in the connecting areas at the groove or slot ends.
  • the retaining element surrounds the screw head in particular in an annular manner, wherein the movement groove or the movement slot is preferably part-circular in this case and runs on an outer side of the screw head.
  • the arcuate slot or the arcuate groove in this case preferably extend over an angular range of at least 30 °, in particular at least 45 °, but preferably less than 300 °. It is preferred, in order to realize a defined deflectability, to provide a continuous movement slot. This has the consequence that there is no connection between the retaining element and the screw head in the region of the movement slot.
  • a Aus 2010schräge is provided on the second locking element. Due to the extension bevel, for example, when opening the screw an elastic movement of the two locking elements away from each other.
  • the locking element provided on the locking screw is preferably moved away from the latching element provided on the housing or the housing opening.
  • the Aus 2010schräge is preferably arranged in the closing direction of rotation of the screw plug before the locking elements. When opening the locking screw thus takes place raising or pushing away the first locking element connected to the locking element due to the Aus nowadaysschräge.
  • the first locking elements is designed as a latching lug and the second latching element as a latching groove.
  • the locking lug is provided on the screw plug, as it is easier to produce on the screw.
  • the detent protrudes in the direction of the housing or the housing opening.
  • the locking lug thus extends parallel to the screw shaft.
  • the latch is on a lower side, i. arranged in the direction of the housing side facing the ring head in particular surrounding the retaining element.
  • the Ausgradschräge is formed on the locking lug, in particular integrally formed on this. Accordingly, the locking groove is provided in the region of the opening on the housing.
  • the entire screw plug is made in one piece from thermoplastic material.
  • a sealing element which surrounds the screw shaft. This can be one at the bottom of the Screw head fitting flat gasket act. It is preferred to provide an O-ring surrounding the screw shaft.
  • the invention thus relates to a housing unit of a motor vehicle engine, in particular an oil housing or an oil pan.
  • the housing unit has a housing wall with an opening, in particular an oil drain opening.
  • the second latching element which is designed according to the invention as a groove disposed.
  • the opening is closed according to the invention by a sealing screw, which has the first locking element, which is resiliently connected to the screw head.
  • the closure screw is, as stated above, advantageously developed.
  • the closure screw according to the invention has a screw shaft 10 with a thread 12.
  • the screw shaft 10 is cylindrical over trained intermediate piece 14 is connected to a screw head 16.
  • the screw head 16 is surrounded by an annular holding element 18.
  • the annular support member 18 is formed integrally with the screw head in the illustrated embodiment, in the illustrated embodiment, the entire plug is made in one piece.
  • a part-circular movement slot 20 is provided between the holding member 18 and the screw head 16. This extends approximately at an angle of 90 ° along an outer side 22 of the screw head 16.
  • the movement slot 20 is in the direction of a bottom 24 (FIG. FIG. 1 ) of the screw head or the holding element 18 open, so that it is a continuous slot.
  • the holding element 18 is connected to the screw head 16, said compound in the illustrated embodiment, the entire remaining outer side 22 of the screw head 16 surrounds. In this area, a recess 30 is provided in the illustrated embodiment.
  • the screw head 16 has on its upper side ( FIG. 2 ) has a groove 32 for a screwdriver.
  • a first latching element 34 is provided on the underside 24 of the holding element 18, which is a latching lug in the illustrated embodiment. This is also produced in a preferred embodiment in one piece with the entire screw plug made of thermoplastic material. With the locking lug 34, a Aus thoroughlyschräge 36 is connected in the illustrated embodiment. This is for easier opening of the screw, as explained later FIG. 4 is explained.
  • the cylindrical intermediate piece 14 is provided with a circumferential groove 38.
  • an O-ring 40 is arranged as a sealing element.
  • the underside 42 of the detent 34 slides on a slope 48 which is provided on the housing wall 50, slightly downwards in the direction of the groove 46.
  • the bevel is designed such that upon reaching the groove continue a step is overcome and the detent 34 thus snaps into the groove 46.
  • the bevel 48 opposite a further associated with the latch nose 52 is provided which supports the latch 34.
  • the slope 48 has the task of simplifying the opening, in particular when opening the closure screw, since a straight groove side surface corresponding to an opposite groove side surface 54 (FIG. FIG. 4 ) would be difficult to overcome when opening the screw. In this case, there would be a risk of damaging the detent 34 and / or the retaining element 18th
  • the slope 48 is provided on the housing wall 50, but the vertical groove side surface 54th opposite groove side surface 56 to the outside, that is inclined away from the groove 46.

Description

Die Erfindung betrifft eine Gehäuseeinheit eines Kraftfahrzeug-Motors wie ein Ölgehäuse bzw. eine Ölwanne mit einer Öffnung in einer Gehäusewand, in der eine Verschlussschraube angeordnet ist.The invention relates to a housing unit of a motor vehicle engine such as an oil housing or an oil pan with an opening in a housing wall, in which a screw plug is arranged.

Beispielsweise zum Ablassen von Schmieröl aus einem Ölgehäuse bzw. einer Ölwanne eines Kraftfahrzeug-Motors ist es bekannt, die Öffnung des Ölgehäuses mit einer Ölablassschraube zu versehen. Bei derartigen Verschlussschrauben muss sichergestellt sein, dass sich aufgrund der auftretenden Vibrationen die Verschlussschraube nicht löst. Hierzu ist beispielsweise aus DE 20 2005 004 943 eine Ölablassschraube aus Metall bekannt, die eine Rastnoppe zur Ausbildung eines Bajonettverschlusses aufweist. Hierbei handelt es sich um ein aufwändiges und teures Bauteil. Ferner tritt bei derartigen Verschlussschrauben, die aus Metall hergestellt sind, eine plastische Verformung der Rastnasen auf. Dies hat zur Folge, dass insbesondere als Ölablassschrauben dienende Verschlussschrauben bei einem Ölwechsel häufig ersetzt werden müssen.For example, for discharging lubricating oil from an oil housing or an oil pan of a motor vehicle engine, it is known to provide the opening of the oil housing with an oil drain plug. In the case of such locking screws, it must be ensured that the locking screw does not come loose due to the vibrations that occur. This is for example off DE 20 2005 004 943 an oil drain plug made of metal, which has a latching nub for forming a bayonet closure. This is a complex and expensive component. Furthermore occurs in such locking screws, which are made of metal, a plastic deformation of the locking lugs. This has the consequence that in particular serving as oil drain plug screws must be replaced frequently when changing the oil.

DE 299 04 061 U1 offenbart ein Gehäuse mit Verschlußstopfen. Aus EP 1 147 992 ist eine Verschlussschraube für Öffnungen an Kraftfahrzeug-Motoren bekannt. Diese weist einen mit einem Gewinde versehenen Schraubenschaft auf, der mit einem Schraubenkopf verbunden ist. An dem Schraubenkopf sind erste Rastelemente vorgesehen, die mit an dem Gehäuse angeordneten zweiten Rastelementen zusammenwirken. DE 299 04 061 U1 discloses a housing with plugs. Out EP 1 147 992 is a plug for openings on motor vehicle engines known. This one has a threaded Screw shank, which is connected to a screw head. At the screw head first locking elements are provided, which cooperate with arranged on the housing second locking elements.

Aufgabe der Erfindung ist es, eine Gehäuseeinheit mit einer Öffnung, in der eine Verschlussschraube angeordnet ist, zu schaffen, die kostengünstig herstellbar und mehrfach verwendbar ist.The object of the invention is to provide a housing unit with an opening in which a screw plug is arranged, which is inexpensive to produce and reusable.

Die Lösung der Aufgabe erfolgt erfindungsgemäß durch die Merkmale des Anspruchs 1.The object is achieved according to the invention by the features of claim 1.

Die erfindungsgemäße Gehäuseeinheit weist eine Öffnung für eine Verschlussschraube auf, die insbesondere zum Verschließen von Ölablass-Öffnungen geeignet ist. Die Verschlussschraube weist einen Schraubenschaft mit einem Gewinde auf. Mit dem Schraubenschaft ist ein Schraubenkopf verbunden. Mit dem Schraubenkopf ist ein erstes Rastelement verbunden, das mit einem an der Öffnung angeordneten zweiten Rastelement zusammenwirkt. Erfindungsgemäß ist das erste Rastelement derart ausgebildet, dass es elastisch federnd mit dem Schraubenkopf verbunden ist. Durch ein derartiges elastisch federnd ausgebildetes Rastelement an der Verschlussschraube ist es möglich, die Verschlussschraube häufiger zu öffnen und zu schließen, wobei auch bei wiederholtem Schließen ein sicheres Einrasten der beiden Rastelemente gewährleistet ist. Hierdurch ist sichergestellt, dass sich die Verschlussschraube auch durch die am Kraftfahrzeug-Motor auftretenden Vibrationen nicht löst.The housing unit according to the invention has an opening for a closure screw, which is particularly suitable for closing oil drain openings. The locking screw has a screw shaft with a thread. A screw head is connected to the screw shaft. With the screw head, a first latching element is connected, which cooperates with a second latching element arranged on the opening. According to the invention, the first latching element is designed such that it is elastically resiliently connected to the screw head. By means of such an elastically resiliently formed locking element on the locking screw, it is possible to open and close the locking screw more frequently, whereby a secure locking of the two locking elements is ensured even with repeated closing. This ensures that the screw plug does not come loose due to the vibrations occurring at the motor vehicle engine.

Besonders bevorzugt ist es, dass zumindest das Rastelement aus thermoplastischem Kunststoff hergestellt ist, um die geforderte elastisch federnde Verbindung mit dem Schraubenkopf zu realisieren. Vorzugsweise ist auch ein das Rastelement tragendes mit dem Schraubenkopf verbundenes Halteelement aus dem selben Material hergestellt. In besonders bevorzugter Ausführungsform ist auch der Schraubenkopf, insbesondere die gesamte Verschlussschraube aus thermoplastischem Kunststoff hergestellt. Als Material ist insbesondere Polyamid PA, PPA oder PPS oder sonstige technische Kunststoffe, die ggf. mit Glasfasern verstärkt sind, geeignet.It is particularly preferred that at least the locking element is made of thermoplastic material to realize the required resilient connection with the screw head. Preferably, a holding element which carries the latching element and is connected to the screw head is also produced from the same material. In a particularly preferred embodiment, the screw head, in particular the entire screw plug made of thermoplastic material. The material is in particular polyamide PA, PPA or PPS or other engineering plastics, which are possibly reinforced with glass fibers suitable.

In bevorzugter Ausführungsform ist das erste, mit der Verschlussschraube verbundene Rastelement über ein Halteelement mit dem Schraubenkopf verbunden. Hierdurch ist es möglich, das Rastelement in einem Abstand zum Schraubenkopf selbst anzuordnen. Besonders bevorzugt ist es, dass die Verbindung des Halteelements mit dem Schraubenkopf derart ausgebildet ist, dass hierdurch eine elastisch federnde Verbindung realisiert ist. Insbesondere kann die Verbindung zwischen dem Halteelement und dem Schraubenkopf, je nach verwendetem Material relativ dünn sein, so dass beim Schließen oder Öffnen der Verschlussschraube das Auslenken des ersten Rastelements aufgrund eines Bewegens bzw. elastischen Verbiegens des Halteelements erfolgt. Hierbei ist es bevorzugt, dass zwischen dem ersten Rastelement, insbesondere dem das erste Rastelement tragenden Halteelement und dem Schraubenkopf, eine Bewegungsnut oder ein Bewegungsschlitz vorgesehen ist. Durch eine derartige Nut oder Schlitz ist die Bewegbarkeit bzw. Auslenkbarkeit des ersten Rastelements beim Öffnen und Schließen der Verschlussschraube verbessert.In a preferred embodiment, the first latching element connected to the locking screw is connected to the screw head via a retaining element connected. This makes it possible to arrange the locking element at a distance from the screw head itself. It is particularly preferred that the connection of the holding element is formed with the screw head such that in this way an elastically resilient connection is realized. In particular, the connection between the retaining element and the screw head, depending on the material used be relatively thin, so that when closing or opening the screw plug, the deflection of the first locking element takes place due to a movement or elastic bending of the retaining element. In this case, it is preferable for a movement groove or a movement slot to be provided between the first latching element, in particular the holding element carrying the first latching element, and the screw head. By such a groove or slot, the mobility or deflectability of the first locking element is improved when opening and closing the locking screw.

Das Halteelement ist seitlich neben dem Nut- bzw. Schlitzende mit dem Schraubenkopf verbunden. Vorzugsweise ist an jedem Ende der Nut bzw. des Schlitzes eine Verbindung vorgesehen. Beim Auslenken bzw. Aufbiegen des Halteelements, das vor dem Einrasten bzw. Lösen der Rastelemente erfolgt, wird die elastisch federnde Bewegung vorzugsweise in den Verbindungsbereichen an den Nut- bzw. Schlitzenden realisiert. Weiter ist es bevorzugt, dass das Halteelement den Schraubenkopf insbesondere ringförmig umgibt, wobei die Bewegungsnut bzw. der Bewegungsschlitz hierbei vorzugsweise teilkreisförmig ausgebildet ist und an einer Außenseite des Schraubenkopfes verläuft. Der bogenförmige Schlitz bzw. die bogenförmige Nut erstrecken sich hierbei vorzugsweise über einen Winkelbereich von mindestens 30°, insbesondere mindestens 45°, jedoch vorzugsweise weniger als 300°. Bevorzugt ist es, um eine definierte Auslenkbarkeit zu realisieren, einen durchgehenden Bewegungsschlitz vorzusehen. Dies hat zur Folge, dass im Bereich des Bewegungsschlitzes keine Verbindung zwischen dem Halteelement und dem Schraubenkopf besteht.The holding element is connected laterally next to the groove or slot end with the screw head. Preferably, a connection is provided at each end of the groove or the slot. When deflecting or bending of the retaining element, which takes place before the engagement or release of the locking elements, the elastically resilient movement is preferably realized in the connecting areas at the groove or slot ends. Further, it is preferred that the retaining element surrounds the screw head in particular in an annular manner, wherein the movement groove or the movement slot is preferably part-circular in this case and runs on an outer side of the screw head. The arcuate slot or the arcuate groove in this case preferably extend over an angular range of at least 30 °, in particular at least 45 °, but preferably less than 300 °. It is preferred, in order to realize a defined deflectability, to provide a continuous movement slot. This has the consequence that there is no connection between the retaining element and the screw head in the region of the movement slot.

Erfindungsgemäß ist an dem zweiten Rastelement eine Ausführschräge vorgesehen. Aufgrund der Ausführschräge erfolgt beispielsweise beim Öffnen der Schraube ein elastisches Bewegen der beiden Rastelemente von einander weg. Hierbei wird vorzugsweise das an der Verschlussschraube vorgesehene Rastelement von dem an dem Gehäuse bzw. der Gehäuseöffnung vorgesehenen Rastelement wegbewegt. Durch das Vorsehen einer Ausführschräge ist somit das Ausrasten beim Öffnen der beiden Rastelemente vereinfacht. Die Ausführschräge ist hierbei vorzugsweise in Schließ-Drehrichtung der Verschlussschraube vor den Rastelementen angeordnet. Beim Öffnen der Verschlussschraube erfolgt somit ein Anheben bzw. Wegdrücken des ersten mit der Verschlussschraube verbundenen Rastelements aufgrund der Ausführschräge.According to the invention a Ausführschräge is provided on the second locking element. Due to the extension bevel, for example, when opening the screw an elastic movement of the two locking elements away from each other. In this case, the locking element provided on the locking screw is preferably moved away from the latching element provided on the housing or the housing opening. By providing a Ausführschräge the disengagement when opening the two locking elements is thus simplified. The Ausführschräge is preferably arranged in the closing direction of rotation of the screw plug before the locking elements. When opening the locking screw thus takes place raising or pushing away the first locking element connected to the locking element due to the Ausführschräge.

Erfindungsgemäß ist das erste Rastelemente als Rastnase und das zweite Rastelement als Rastnut ausgebildet. Die Rastnase ist an der Verschlussschraube vorgesehen, da diese an der Schraube leichter herzustellen ist. Insbesondere ragt die Rastnase in Richtung des Gehäuses bzw. der Gehäuseöffnung. Die Rastnase erstreckt sich somit parallel zum Schraubenschaft. Vorzugsweise ist die Rastnase an einer Unterseite, d.h. der in Richtung des Gehäuses weisenden Seite des insbesondere den Schraubenkopf ringförmig umgebenden Halteelements angeordnet. Die Ausführschräge ist an der Rastnase ausgebildet, insbesondere einstückig an diese angeformt. Dementsprechend ist die Rastnut im Bereich der Öffnung an dem Gehäuse vorgesehen.According to the invention the first locking elements is designed as a latching lug and the second latching element as a latching groove. The locking lug is provided on the screw plug, as it is easier to produce on the screw. In particular, the detent protrudes in the direction of the housing or the housing opening. The locking lug thus extends parallel to the screw shaft. Preferably, the latch is on a lower side, i. arranged in the direction of the housing side facing the ring head in particular surrounding the retaining element. The Ausführschräge is formed on the locking lug, in particular integrally formed on this. Accordingly, the locking groove is provided in the region of the opening on the housing.

Besonders bevorzugt ist es, dass die gesamte Verschlussschraube einstückig aus thermoplastischem Kunststoff hergestellt ist.It is particularly preferred that the entire screw plug is made in one piece from thermoplastic material.

Ferner ist es bevorzugt, ein Dichtelement vorzusehen, das den Schraubenschaft umgibt. Hierbei kann es sich um eine an der Unterseite des Schraubenkopfes anliegende Flachdichtung handeln. Bevorzugt ist es, einen den Schraubenschaft umgebenden O-Ring vorzusehen.Furthermore, it is preferable to provide a sealing element which surrounds the screw shaft. This can be one at the bottom of the Screw head fitting flat gasket act. It is preferred to provide an O-ring surrounding the screw shaft.

Die Erfindung betrifft somit eine Gehäuseeinheit eines Kraftfahrzeugmotors, insbesondere ein Ölgehäuse bzw. eine Ölwanne. Die Gehäuseeinheit weist eine Gehäusewand mit einer Öffnung, insbesondere einer Ölablass-Öffnung auf. Im Bereich der Öffnung ist das zweite Rastelement, das erfindungsgemäß als Nut ausgebildet ist, angeordnet. Die Öffnung wird erfindungsgemäß durch eine Versschlussschraube verschlossen, die das erste Rastelement aufweist, das elastisch federnd mit dem Schraubenkopf verbunden ist. Die Verschlussschraube ist, wie vorstehend ausgeführt, vorteilhaft weitergebildet.The invention thus relates to a housing unit of a motor vehicle engine, in particular an oil housing or an oil pan. The housing unit has a housing wall with an opening, in particular an oil drain opening. In the region of the opening, the second latching element, which is designed according to the invention as a groove disposed. The opening is closed according to the invention by a sealing screw, which has the first locking element, which is resiliently connected to the screw head. The closure screw is, as stated above, advantageously developed.

Nachfolgend wird die Erfindung anhand einer bevorzugten Ausführungsform, unter Bezugnahme auf die anliegenden Zeichnungen näher erläutert.The invention will be explained in more detail below with reference to a preferred embodiment, with reference to the accompanying drawings.

Es zeigen:

Figur 1
eine schematische Seitenansicht einer erfindungsgemäßen Verschlussschraube,
Figur 2
eine schematische Draufsicht der Verschlussschraube in Richtung des Pfeils II in Figur 1,
Figur 3
eine schematische Schnittansicht entlang der Linie III - III in Figur 1 und
Figur 4
eine schematische Seitenansicht einer in eine Gehäuseöffnung wie eine Ölablass-Öffnung eingeschraubte Verschlussschraube.
Show it:
FIG. 1
a schematic side view of a locking screw according to the invention,
FIG. 2
a schematic plan view of the plug in the direction of arrow II in FIG. 1 .
FIG. 3
a schematic sectional view taken along the line III - III in FIG. 1 and
FIG. 4
a schematic side view of a screwed into a housing opening such as an oil drainage screw plug.

Die erfindungsgemäße Verschlussschraube weist einen Schraubenschaft 10 mit einem Gewinde 12 auf. Der Schraubenschaft 10 ist über ein zylindrisch ausgebildetes Zwischenstück 14 mit einem Schraubenkopf 16 verbunden. Der Schraubenkopf 16 ist von einem ringförmig ausgebildeten Halteelement 18 umgeben. Das ringförmige Halteelement 18 ist im dargestellten Ausführungsbeispiel einstückig mit dem Schraubenkopf ausgebildet, wobei im dargestellten Ausführungsbeispiel die gesamte Verschlussschraube einstückig hergestellt ist.The closure screw according to the invention has a screw shaft 10 with a thread 12. The screw shaft 10 is cylindrical over trained intermediate piece 14 is connected to a screw head 16. The screw head 16 is surrounded by an annular holding element 18. The annular support member 18 is formed integrally with the screw head in the illustrated embodiment, in the illustrated embodiment, the entire plug is made in one piece.

Zwischen dem Halteelement 18 und dem Schraubenkopf 16 ist ein teilkreisförmiger Bewegungsschlitz 20 vorgesehen. Dieser erstreckt sich ca. um einen Winkel von 90° entlang einer Außenseite 22 des Schraubenkopfes 16. Der Bewegungsschlitz 20 ist in Richtung einer Unterseite 24 (Figur 1) des Schraubenkopfes bzw. des Halteelements 18 offen, so dass es sich um einen durchgehenden Schlitz handelt. Im Bereich der beiden Schlitzenden 26 (Figur 2) ist das Halteelement 18 mit dem Schraubenkopf 16 verbunden, wobei diese Verbindung im dargestellten Ausführungsbeispiel die gesamte übrige Außenseite 22 des Schraubenkopfes 16 umgibt. In diesem Bereich ist im dargestellten Ausführungsbeispiel eine Vertiefung 30 vorgesehen.Between the holding member 18 and the screw head 16, a part-circular movement slot 20 is provided. This extends approximately at an angle of 90 ° along an outer side 22 of the screw head 16. The movement slot 20 is in the direction of a bottom 24 (FIG. FIG. 1 ) of the screw head or the holding element 18 open, so that it is a continuous slot. In the region of the two slot ends 26 ( FIG. 2 ), the holding element 18 is connected to the screw head 16, said compound in the illustrated embodiment, the entire remaining outer side 22 of the screw head 16 surrounds. In this area, a recess 30 is provided in the illustrated embodiment.

Ferner weist der Schraubenkopf 16 an seiner Oberseite (Figur 2) eine Nut 32 für einen Schraubendreher auf.Furthermore, the screw head 16 has on its upper side ( FIG. 2 ) has a groove 32 for a screwdriver.

Zur Sicherung der Lage der Verschlussschraube in einer Öffnung wie einer Ölablass-Öffnung ist an der Unterseite 24 des Halteelements 18 ein erstes Rastelement 34 vorgesehen, bei dem es sich im dargestellten Ausführungsbeispiel um eine Rastnase handelt. Auch diese ist in bevorzugter Ausführungsform einstückig mit der gesamten Verschlussschraube aus thermoplastischem Kunststoff hergestellt. Mit der Rastnase 34 ist im dargestellten Ausführungsbeispiel eine Ausführschräge 36 verbunden. Diese dient zum leichteren Öffnen der Schraube, wie später anhand Figur 4 erläutert wird.To secure the position of the screw plug in an opening such as an oil drain opening, a first latching element 34 is provided on the underside 24 of the holding element 18, which is a latching lug in the illustrated embodiment. This is also produced in a preferred embodiment in one piece with the entire screw plug made of thermoplastic material. With the locking lug 34, a Ausführschräge 36 is connected in the illustrated embodiment. This is for easier opening of the screw, as explained later FIG. 4 is explained.

Des Weiteren ist im dargestellten Ausführungsbeispiel das zylindrische Zwischenstück 14 mit einer umlaufenden Nut 38 versehen. In der Nut 38 ist als Dichtelement ein O-Ring 40 angeordnet.Furthermore, in the illustrated embodiment, the cylindrical intermediate piece 14 is provided with a circumferential groove 38. In the groove 38, an O-ring 40 is arranged as a sealing element.

Beim Verschließen der Öffnung wie der Ölablass-Öffnung durch die erfindungsgemäße Verschlussschraube liegt beim Einschrauben der Verschlussschraube in das in dem Gehäuse vorgesehene Gewinde, kurz vor Beendigen des Einschraubvorgangs, eine Unterseite 42 der Rastnase 34 an einer die Öffnung umgebenden Außenwand 44 (Figur 4) an. Hierdurch wird die Rastnase 34 zusammen mit dem Halteelement 18 in Figur 4 nach oben elastisch verbogen. Sobald die Rastnase 34 sodann in das zweite Rastelement 46 bzw. die Nut einrastet, ist der Schließvorgang beendet. Diese Stellung ist in Figur 4 dargestellt.When closing the opening as the oil drain opening through the locking screw according to the invention is when screwing the screw in the thread provided in the housing, just before completing the screwing, a bottom 42 of the latch 34 at an outer wall surrounding the opening 44 ( FIG. 4 ) at. As a result, the latching lug 34 together with the holding element 18 in FIG. 4 bent up elastically. As soon as the latching lug 34 then engages in the second latching element 46 or the groove, the closing operation is completed. This position is in FIG. 4 shown.

Kurz vor dem Erreichen der Nut 46 gleitet die Unterseite 42 der Rastnase 34 an einer Schräge 48, die an der Gehäusewand 50 vorgesehen ist, leicht nach unten in Richtung der Nut 46. Die Schräge ist hierbei jedoch derart ausgebildet, dass bei Erreichen der Nut weiterhin eine Stufe überwunden wird und die Rastnase 34 somit in die Nut 46 einschnappt. Der Schräge 48 gegenüberliegend ist eine weitere mit der Rastnase verbundene Schräge 52 vorgesehen, die die Rastnase 34 abstützt.Shortly before reaching the groove 46, the underside 42 of the detent 34 slides on a slope 48 which is provided on the housing wall 50, slightly downwards in the direction of the groove 46. However, the bevel is designed such that upon reaching the groove continue a step is overcome and the detent 34 thus snaps into the groove 46. The bevel 48 opposite a further associated with the latch nose 52 is provided which supports the latch 34.

Die Schräge 48 hat insbesondere beim Öffnen der Verschlussschraube die Aufgabe, das Öffnen zu vereinfachen, da eine gerade Nut-Seitenfläche entsprechend einer gegenüberliegenden Nutseitenfläche 54 (Figur 4) beim Öffnen der Schraube nur schwer überwunden werden könnte. Hierbei bestünde die Gefahr des Beschädigens der Rastnase 34 und/ oder des Halteelements 18.The slope 48 has the task of simplifying the opening, in particular when opening the closure screw, since a straight groove side surface corresponding to an opposite groove side surface 54 (FIG. FIG. 4 ) would be difficult to overcome when opening the screw. In this case, there would be a risk of damaging the detent 34 and / or the retaining element 18th

Um dies zu vermeiden, ist nicht nur die Schräge 48 an der Gehäusewand 50 vorgesehen, sondern die der senkrechten Nutseitenfläche 54 gegenüberliegende Nutseitenfläche 56 nach außen, d.h. von der Nut 46 weg geneigt.To avoid this, not only the slope 48 is provided on the housing wall 50, but the vertical groove side surface 54th opposite groove side surface 56 to the outside, that is inclined away from the groove 46.

Claims (12)

  1. Housing unit of a motor vehicle engine, in particular an oil housing, having a housing wall (50) with an opening, in particular an oil drain opening, wherein a locking screw is arranged in the opening, comprising
    a screw shaft (10) having a thread (12),
    a screw head (16) connected with the screw shaft (10), and
    a first latch element connected with the screw head (16), said latch element cooperating with a second latch element arranged at the opening,
    wherein a movement grove or a movement slot (20) is provided between the first latch element (34) and the screw head (16), so that the first latch element (34) is resiliently connected with the screw head (16), wherein the first latch element is designed as a latch nose (34) engaging the second latch element designed as a latch groove (46) which is arranged in the region of the opening,
    characterized in that the latch groove (46) comprises a guide-out ramp (48) provided on a housing wall (50), a perpendicular latera groove surface (54) as an abutment surface, and a lateral groove surface (56) opposite the perpendicular lateral groove surface (54), which is inclined outward away from the latch groove (46).
  2. Housing unit of claim 1, characterized in that the first latch element (34) is arranged at a resilient holding element (18) connected with the screw head (16).
  3. Housing unit of claim 2, characterized in that the movement groove or the movement slot (20) is provided between the holding element (18) supporting the first latch element and the screw head (16).
  4. Housing unit of claim 2 or 3, characterized in that the holding element (18) is connected with the screw head (16) at least at one, preferably at both groove or slot ends (26).
  5. Housing unit of one of claims 2 to 4, characterized in that the holding element (18) surrounds the screw head (16) in particular in a ring-like manner.
  6. Housing unit of one of claims 3 to 5, characterized in that the movement groove or the movement slot (20) extends in a segment shape at an outer side (26) of the screw head (16).
  7. Housing unit of one of claims 1 to 6, characterized in that the first latch element (34) and the second latch element (46) comprise a guide-out ramp (48, 52).
  8. Housing unit of claim 7, characterized in that the guide-out ramp is arranged in front of the latch elements (34, 36), seen in the direction of rotation for locking.
  9. Housing unit of one of claims 1 to 8, characterized in that a guide-out ramp (52) is formed at the latch nose (34), in particular molded thereon.
  10. Housing unit of one of claims 1 to 9, characterized in that the latch element (34) connected with the screw head (16), as well as preferably the holding element (18) supporting the latch element (34), is made of thermoplastic material.
  11. Housing unit of one of claims 1 to 10, characterized in that the screw head (16), preferably the entire locking screw, is made of thermoplastic material.
  12. Housing unit of one of claims 1 to 11, characterized by a seal element surrounding the screw shaft (10), in particular an O-ring seal.
EP10155343.6A 2009-03-10 2010-03-03 Locking screw for openings in motor vehicle engines and housing unit of a motor vehicle engine Active EP2228520B8 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10155343T PL2228520T3 (en) 2009-03-10 2010-03-03 Locking screw for openings in motor vehicle engines and housing unit of a motor vehicle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009011941A DE102009011941A1 (en) 2009-03-10 2009-03-10 Screw plug for openings in motor vehicle engines and housing unit of a motor vehicle engine

Publications (4)

Publication Number Publication Date
EP2228520A2 EP2228520A2 (en) 2010-09-15
EP2228520A3 EP2228520A3 (en) 2011-02-23
EP2228520B1 true EP2228520B1 (en) 2018-12-05
EP2228520B8 EP2228520B8 (en) 2019-07-24

Family

ID=42235446

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10155343.6A Active EP2228520B8 (en) 2009-03-10 2010-03-03 Locking screw for openings in motor vehicle engines and housing unit of a motor vehicle engine

Country Status (4)

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EP (1) EP2228520B8 (en)
DE (2) DE102009011941A1 (en)
ES (1) ES2714210T3 (en)
PL (1) PL2228520T3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010040404A1 (en) * 2010-09-08 2012-03-08 Mahle International Gmbh Filter arrangement for hydraulic medium, in particular oil
DE102010062846A1 (en) * 2010-12-10 2012-06-14 Mahle International Gmbh filtering device
DE102012220695A1 (en) 2012-11-13 2014-05-15 Dichtungstechnik G. Bruss Gmbh & Co. Kg Screw cap arrangement for closing aperture in e.g. cylinder head bonnet of internal combustion engine of automobile, has bias-producing elements and co-operating latch unit arranged at head and shaft of closure element, respectively
DE102014217036A1 (en) 2014-08-27 2016-03-03 Mahle International Gmbh closure device
JP6637744B2 (en) * 2015-11-25 2020-01-29 ダイキョーニシカワ株式会社 Oil pan drain structure
DE102016213798A1 (en) * 2016-07-27 2018-02-01 Mahle International Gmbh impactor

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Publication number Priority date Publication date Assignee Title
FR2549532A1 (en) * 1983-07-22 1985-01-25 Valeo Device for emptying or draining a heat exchanger
DE4312550C1 (en) * 1993-04-17 1994-09-15 Hpf Hans P Friedrich Elektroni Device for assessing moving objects
DE29904061U1 (en) * 1999-03-05 1999-07-22 Boellhoff Gmbh Housing with sealing plug

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Publication number Priority date Publication date Assignee Title
JPS6050144U (en) * 1983-09-16 1985-04-09 凸版印刷株式会社 cap alignment container
DE20006755U1 (en) * 2000-04-12 2000-08-03 Blau Kunststofftechnik Zweigni Filling device
DE50007377D1 (en) * 2000-04-22 2004-09-16 Ibs Filtran Kunststoff Metall Locking system for molded plastic parts
JP4749693B2 (en) * 2004-06-29 2011-08-17 日本キム株式会社 Container with spout
DE202005004943U1 (en) 2005-03-21 2006-07-27 Reutter Metallwarenfabrik Gmbh Drain plug for automobile oil sump has bayonet fitting and radial seal
US8069952B2 (en) * 2006-12-06 2011-12-06 Basf Aktiengesellschaft Fluid reservoir assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2549532A1 (en) * 1983-07-22 1985-01-25 Valeo Device for emptying or draining a heat exchanger
DE4312550C1 (en) * 1993-04-17 1994-09-15 Hpf Hans P Friedrich Elektroni Device for assessing moving objects
DE29904061U1 (en) * 1999-03-05 1999-07-22 Boellhoff Gmbh Housing with sealing plug

Also Published As

Publication number Publication date
ES2714210T8 (en) 2019-08-21
ES2714210T3 (en) 2019-05-27
EP2228520B8 (en) 2019-07-24
EP2228520A3 (en) 2011-02-23
DE202010018359U1 (en) 2015-11-18
DE102009011941A1 (en) 2010-09-23
EP2228520A2 (en) 2010-09-15
PL2228520T3 (en) 2019-05-31

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