EP2228520A2 - 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
EP2228520A2
EP2228520A2 EP10155343A EP10155343A EP2228520A2 EP 2228520 A2 EP2228520 A2 EP 2228520A2 EP 10155343 A EP10155343 A EP 10155343A EP 10155343 A EP10155343 A EP 10155343A EP 2228520 A2 EP2228520 A2 EP 2228520A2
Authority
EP
European Patent Office
Prior art keywords
screw
latching
screw head
closure
opening
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.)
Granted
Application number
EP10155343A
Other languages
German (de)
French (fr)
Other versions
EP2228520B1 (en
EP2228520A3 (en
EP2228520B8 (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 Automotive 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.)
Filing date
Publication date
Application filed by Polytec Automotive GmbH and Co KG filed Critical Polytec Automotive 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
Publication of EP2228520B1 publication Critical patent/EP2228520B1/en
Application granted granted Critical
Publication of EP2228520B8 publication Critical patent/EP2228520B8/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 screw plug for openings in motor vehicle engines and in particular an oil drain opening. Furthermore, the invention relates to a housing of a motor vehicle engine such as an oil housing or an oil pan with an opening in a housing wall, in which a closure screw according to the invention is arranged.
  • the object of the invention is to provide a screw plug for openings in motor vehicle engines, in particular for oil drain openings, which is inexpensive to produce and reusable. It is also a task the invention to provide a corresponding housing unit of a motor vehicle engine.
  • the closure screw according to the invention which is particularly suitable for closing oil drain openings, 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 AusGermanschräge is provided on the first and / or the second latching 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.
  • one of the two locking elements is designed as a latching lug and the other latching element as a latching groove.
  • the locking lug is provided on the screw plug, as this 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 in a preferred embodiment of 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 preferable to provide an O-ring surrounding the screw shaft.
  • the invention 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 preferably formed as a groove, is arranged.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Connection Of Plates (AREA)

Abstract

The screw has a screw shaft (10) comprising a thread (12), and a screw head (16) connected with the screw shaft. A latching element i.e. latching nose (34), flexibly connected with the screw head, which cooperates with another latching element arranged at an opening. A movement slot is provided between a retaining element and the screw head, where the retaining element is connected with the screw head at groove and slot-ends. The retaining element circularly surrounds the screw head, where the screw is made of thermoplastic.

Description

Die Erfindung betrifft eine Verschlussschraube für Öffnungen an Kraftfahrzeug-Motoren sowie insbesondere eine Ölablass-Öffnung. Ferner betrifft die Erfindung ein Gehäuse eines Kraftfahrzeug-Motors wie ein Ölgehäuse bzw. eine Ölwanne mit einer Öffnung in einer Gehäusewand, in der eine erfindungsgemäße Verschlussschraube angeordnet ist.The invention relates to a screw plug for openings in motor vehicle engines and in particular an oil drain opening. Furthermore, the invention relates to a housing of a motor vehicle engine such as an oil housing or an oil pan with an opening in a housing wall, in which a closure screw according to the invention 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.

Aufgabe der Erfindung ist es, eine Verschlussschraube für Öffnungen an Kraftfahrzeug-Motoren, insbesondere für Ölablass-Öffnungen zu schaffen, die kostengünstig herstellbar und mehrfach verwendbar ist. Ferner ist es Aufgabe der Erfindung, eine entsprechende Gehäuseeinheit eines Kraftfahrzeug-Motors zu schaffen.The object of the invention is to provide a screw plug for openings in motor vehicle engines, in particular for oil drain openings, which is inexpensive to produce and reusable. It is also a task the invention to provide a corresponding housing unit of a motor vehicle engine.

Die Lösung der Aufgabe erfolgt erfindungsgemäß durch die Merkmale des Anspruchs 1 bzw. 14.The object is achieved by the features of claim 1 and 14, respectively.

Die erfindungsgemäße Verschlussschraube, die insbesondere zum Verschließen von Ölablass-Öffnungen geeignet ist, 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 closure screw according to the invention, which is particularly suitable for closing oil drain openings, 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.

Bei einer besonders bevorzugten Ausführungsform der erfindungsgemäßen Verschlussschraube ist an dem ersten und/ oder 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.In a particularly preferred embodiment of the closure screw according to the invention a Ausführschräge is provided on the first and / or the second latching 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.

Vorzugsweise ist eines der beiden Rastelemente als Rastnase und das andere Rastelement als Rastnut ausgebildet. Bevorzugt ist es hierbei, dass die Rastnase an der Verschlussschraube vorgesehen ist, 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 in bevorzugter Ausführungsform an der Rastnase ausgebildet, insbesondere einstückig an diese angeformt. Dementsprechend ist die Rastnut im Bereich der Öffnung an dem Gehäuse vorgesehen.Preferably, one of the two locking elements is designed as a latching lug and the other latching element as a latching groove. It is preferred in this case that the locking lug is provided on the screw plug, as this 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 in a preferred embodiment of 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 preferable to provide an O-ring surrounding the screw shaft.

Ferner betrifft die Erfindung 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 vorzugsweise 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.Furthermore, the invention 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 preferably formed as a groove, is arranged. 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:Show it:

Figur 1FIG. 1
eine schematische Seitenansicht einer erfindungsgemäßen Verschlussschraube,a schematic side view of a locking screw according to the invention,
Figur 2FIG. 2
eine schematische Draufsicht der Verschlussschraube in Richtung des Pfeils II in Figur 1,a schematic plan view of the plug in the direction of arrow II in FIG. 1 .
Figur 3FIG. 3
eine schematische Schnittansicht entlang der Linie III - III in Figur 1 unda schematic sectional view taken along the line III - III in FIG. 1 and
Figur 4FIG. 4
eine schematische Seitenansicht einer in eine Gehäuseöffnung wie eine Ölablass-Öffnung eingeschraubte Verschlussschraube.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 (14)

Verschlussschraube für Öffnungen an Kraftfahrzeug-Motoren, insbesondere Ölablass-Öffnungen, mit
einem ein Gewinde (12) aufweisenden Schraubenschaft (10),
einem mit dem Schraubenschaft (10) verbundenen Schraubenkopf (16) und
einem mit dem Schraubenkopf (16) verbundenen ersten Rastelement (34), das mit einem an der Öffnung angeordneten zweiten Rastelement (46) zusammenwirkt,
dadurch gekennzeichnet, dass
das erste Rastelement (34) elastisch federnd mit dem Schraubenkopf (16) verbunden ist.Closing screw for openings on motor vehicle engines, in particular oil drain openings, with
a threaded shank (10) having a thread (12),
one with the screw shank (10) connected to the screw head (16) and
a first latching element (34) connected to the screw head (16) and cooperating with a second latching element (46) arranged at the opening,
characterized in that
the first latching element (34) is resiliently connected to the screw head (16). Verschlussschraube nach Anspruch 1, dadurch gekennzeichnet, dass das erste Rastelement (34) an einem mit dem Schraubenkopf (16) verbundenen elastisch federnden Halteelement (18) angeordnet ist.Closure screw according to claim 1, characterized in that the first latching element (34) is arranged on a with the screw head (16) connected to the resilient retaining element (18). Verschlussschraube nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zwischen dem ersten Rastelement (34) insbesondere dem das erste Rastelement (34) tragenden Halteelement (18) und dem Schraubenkopf (16) eine Bewegungsnut oder ein Bewegungsschlitz (20) vorgesehen ist.Closure screw according to claim 1 or 2, characterized in that between the first detent element (34) in particular the first detent element (34) supporting the holding element (18) and the screw head (16) is provided a movement groove or a movement slot (20). Verschlussschraube nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass das Halteelement (18) zumindest auf einer, vorzugsweise an beiden Nut- bzw. Schlitzenden (26) mit dem Schraubenkopf (16) verbunden ist.Closure screw according to claim 2 or 3, characterized in that the holding element (18) is connected to at least one, preferably at both groove or slot ends (26) with the screw head (16). Verschlussschraube nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass das Halteelement (18) den Schraubenkopf (16) insbesondere ringförmig umgibt.Closure screw according to one of claims 2 to 4, characterized in that the holding element (18) surrounding the screw head (16) in particular annular. Verschlussschraube nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass sich die Bewegungsnut bzw. der Bewegungsschlitz (20) teilkreisförmig an einer Außenseite (26) des Schraubenkopfs (16) erstreckt.Closure screw according to one of claims 3 to 5, characterized in that the movement groove or the movement slot (20) extends part-circularly on an outer side (26) of the screw head (16). Verschlussschraube nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das erste Rastelement (34) und/ oder das zweite Rastelement (46) eine Ausführschräge (48, 52) aufweist.Closure screw according to one of claims 1 to 6, characterized in that the first latching element (34) and / or the second latching element (46) has a Ausführschräge (48, 52). Verschlussschraube nach Anspruch 7, dadurch gekennzeichnet, dass die Ausführschräge in Schließ-Drehrichtung der Verschlussschraube vor den Rastelementen (34, 46) angeordnet ist.Closing screw according to claim 7, characterized in that the extension slope in the closing direction of rotation of the locking screw in front of the locking elements (34, 46) is arranged. Verschlussschraube nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das erste oder zweite Rastelement als Rastnase (34) ausgebildet ist, die in das zweite bzw. erste als Rastnut (46) ausgebildete Rastelement eingreift.Closure screw according to one of claims 1 to 8, characterized in that the first or second latching element as a latching lug (34) is formed, which engages in the second or first latching groove (46) formed locking element. Verschlussschraube nach Anspruch 9, dadurch gekennzeichnet, dass eine Ausführschräge (52) an der Rastnase (34) ausgebildet, insbesondere an dieser angeformt ist.Closure screw according to claim 9, characterized in that a Ausführschräge (52) formed on the latching lug (34), in particular formed on this. Verschlussschraube nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass das mit dem Schraubenkopf (16) verbundene Rastelement (34) sowie vorzugsweise das, das Rastelement (34) tragende Halteelement (18) aus thermoplastischem Kunststoff hergestellt ist.Closure screw according to one of claims 1 to 10, characterized in that the screw head (16) connected to the latching element (34) and preferably the, the latching element (34) supporting the holding element (18) is made of thermoplastic material. Verschlussschraube nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass der Schraubenkopf (16), vorzugsweise die gesamte Verschlussschraube aus thermoplastischem Kunststoff hergestellt ist.Closure screw according to one of claims 1 to 11, characterized in that the screw head (16), preferably the entire screw plug is made of thermoplastic material. Verschlussschraube nach einem der Ansprüche 1 bis 12, gekennzeichnet durch ein den Schraubenschaft (10) umgebendes Dichtelement, insbesondere einen O-Ring.Closing screw according to one of claims 1 to 12, characterized by a screw shaft (10) surrounding the sealing element, in particular an O-ring. Gehäuseeinheit eines Kraftfahrzeug-Motors, insbesondere Ölgehäuse, mit
einer Gehäusewand (50) mit Öffnung, insbesondere Ölablass-Öffnung,
einem im Bereich der Öffnung angeordneten zweiten Rastelement (46) und
einer in der Öffnung angeordneten Verschlussschraube nach einem der Ansprüche 1 bis 13.Housing unit of a motor vehicle engine, in particular oil housing, with
a housing wall (50) with an opening, in particular an oil drain opening,
a arranged in the region of the opening second locking element (46) and
a closure screw arranged in the opening according to one of claims 1 to 13.
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 true EP2228520A2 (en) 2010-09-15
EP2228520A3 EP2228520A3 (en) 2011-02-23
EP2228520B1 EP2228520B1 (en) 2018-12-05
EP2228520B8 EP2228520B8 (en) 2019-07-24

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ID=42235446

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2463006A1 (en) * 2010-12-10 2012-06-13 Mahle International GmbH Filter 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
EP2428261A3 (en) * 2010-09-08 2014-10-29 MAHLE International GmbH Filter assembly for hydraulic media, in particular oil
EP3276133A1 (en) * 2016-07-27 2018-01-31 Mahle International GmbH Impactor assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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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 Böllhoff GmbH, 33649 Bielefeld Housing with sealing plug
EP1147992A1 (en) 2000-04-22 2001-10-24 IBS Filtran Kunststoff-/Metallerzeugnisse GmbH Closure system for molded plastic parts
JP2006044790A (en) 2004-06-29 2006-02-16 Nippon Kimu Kk Accommodation body 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
US20080135340A1 (en) 2006-12-06 2008-06-12 Schlicker Scott C Fluid reservoir assembly

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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 Böllhoff GmbH, 33649 Bielefeld Housing with sealing plug
EP1147992A1 (en) 2000-04-22 2001-10-24 IBS Filtran Kunststoff-/Metallerzeugnisse GmbH Closure system for molded plastic parts
JP2006044790A (en) 2004-06-29 2006-02-16 Nippon Kimu Kk Accommodation body 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
US20080135340A1 (en) 2006-12-06 2008-06-12 Schlicker Scott C Fluid reservoir assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2428261A3 (en) * 2010-09-08 2014-10-29 MAHLE International GmbH Filter assembly for hydraulic media, in particular oil
EP2463006A1 (en) * 2010-12-10 2012-06-13 Mahle International GmbH Filter 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
EP3276133A1 (en) * 2016-07-27 2018-01-31 Mahle International GmbH Impactor assembly

Also Published As

Publication number Publication date
DE102009011941A1 (en) 2010-09-23
EP2228520B1 (en) 2018-12-05
ES2714210T8 (en) 2019-08-21
PL2228520T3 (en) 2019-05-31
ES2714210T3 (en) 2019-05-27
EP2228520A3 (en) 2011-02-23
EP2228520B8 (en) 2019-07-24
DE202010018359U1 (en) 2015-11-18

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