EP1600609B1 - Valve lifter for an internal combustion engine - Google Patents

Valve lifter for an internal combustion engine Download PDF

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Publication number
EP1600609B1
EP1600609B1 EP05009745A EP05009745A EP1600609B1 EP 1600609 B1 EP1600609 B1 EP 1600609B1 EP 05009745 A EP05009745 A EP 05009745A EP 05009745 A EP05009745 A EP 05009745A EP 1600609 B1 EP1600609 B1 EP 1600609B1
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EP
European Patent Office
Prior art keywords
face
web
bucket tappet
head
cam
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.)
Not-in-force
Application number
EP05009745A
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German (de)
French (fr)
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EP1600609A2 (en
EP1600609A3 (en
Inventor
Lutz Dipl.-Ing. Kirbach
Robert Dipl.-Ing. Kamm
Arndt Dipl.-Ing. Ihlemann
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication of EP1600609A2 publication Critical patent/EP1600609A2/en
Publication of EP1600609A3 publication Critical patent/EP1600609A3/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
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts

Definitions

  • the invention relates to a tappet of a valve train of an internal combustion engine, with a sealed on one side by a bottom hollow cylindrical shirt, which bottom on its outer face a stop surface for a cam and on its inner face a centric system for a gas exchange valve, wherein the contact surface a seen in the direction of travel of the cam has cylindrical course and the plunger is provided to its orientation with respect to the cam with means for preventing rotation relative to its surrounding structure.
  • Such a tappet is considered from the considered generic EP 1 260 679 A3 previously known.
  • This tappet also has a hollow cylindrical shirt with a cylindrically curved bottom in the cam direction. The latter is here thin-walled as the shirt shown. An inner face substantially follows an outer face of the floor. It can be seen that the shirt has only a shortened leadership height and, starting from an upper end of the shirt, two opposing concave side walls are provided, which converge towards one another and form a narrow base for a cam contact at the end.
  • the plunger is not suitable for mass production because of its complicated geometry. In addition, he has only an insufficient guide length for inclusion in the surrounding construction.
  • the cam is also provided only a relatively narrow start-up area on the outside of the floor, so that here is attributable to premature wear or costly wear protection measures must come to fruition. Possibly. For example, relatively high wall thicknesses must be used to meet stiffness requirements.
  • the object of the invention is therefore to provide a bucket tappet of the known type, in which the cited disadvantages are eliminated by simple means.
  • a bucket tappet is to be created, which can be easily and inexpensively mass produced with excellent rigidity.
  • the inner end face has a deviating from the outer end surface of the bottom course and a radially extending, planar web, between the edges of the system is symmetrically positioned, wherein each edge of a roof like a beveled away from the ground away , consisting of solid material leg extends to an inner side of the shirt, which legs are axially symmetric and the web is orthogonal to the cylindrical extension of the contact surface.
  • a contribution in the direction of increasing stiffness is also achieved in that the web is orthogonal to the cylindrical extent of the outer end face of the soil. Possibly. However, this web may also be parallel or generally only angularly offset from the cylindrical extension of the outer end face of the soil.
  • Due to the cylindrical course can be reduced with guaranteed emigration area for the cam on the outer face on the ground, the diameter of the bucket tappet.
  • anti-rotation is provided according to a subclaim, for example, arranged in a shirt of the tappet roller needle, which projects beyond the shirt radially outward and thus runs during installation of the tappet in a longitudinal groove of a receiving bore in the cylinder head or a similar surrounding construction.
  • the bucket tappet can also be designed self-centering.
  • the system for the gas exchange valve on the web as a truncated cone-like elevation.
  • a defined contact surface which if necessary can also be designed to be wear-resistant, is created.
  • the system can be kept variable in height for the assembly process at the engine manufacturer.
  • the installation is manufactured together or alone with the entire inner end face of the floor by means of a non-cutting production process such as embossing, embossing extrusion, forging or the like.
  • the roof-like bevelled legs can be formed in addition to their training of "solid material” as a thin-walled and projecting from the inner end face of the soil ribs. Due to this measure, another contribution may be made in the direction of lightweight construction and lowering of the oscillating valve train masses.
  • roof-like tapered legs are proposed. These may, for example, run concavely or convexly curved or have a substantially planar extension. The skilled person will find at this point by the familiar calculation and design methods, the appropriate shape of the legs for his application.
  • the figures disclose a bucket tappet 1 of a valve train of an internal combustion engine.
  • This consists of a closed on one side by a bottom 2 hollow cylindrical shirt 3.
  • the bottom 2 has an outer end face 4.
  • This is designed as a contact surface 5 for a cam, not shown.
  • the contact surface 5 should have a cylindrical course seen in the direction of emigration A of the cam.
  • This can be, for example, a roller needle pressed into the recess 14, which protrudes slightly radially beyond the shirt 3 and, when the tappet 1 is installed, extends into its corresponding receptacle in the cylinder head in a longitudinal groove applied there.
  • an inner end face 6 of the bottom 2 has a significantly different from the outer face 4 course.
  • a radially extending, flat web 8 is applied to the inner end face 6.
  • a system 7 is provided for a gas exchange valve. This can, as in particular from the FIGS. 3, 4 emerges, for example, be shown as a truncated cone-like elevation on the web 8. It must be mentioned that the plant 7 is advantageously generated in a chipless production process such as embossing.
  • each of the abovementioned edges 9, 10 is each a leg-like beveled from the bottom 2 away leg 11, 12 to an inner side 13 of the shirt 3.
  • these are a flat roof shape, as in FIG. 4 revealed, have.
  • the entire inner end face 6 of the base 2 is produced with the web 8 in one or more work steps in a non-cutting production method, such as embossing or extruding, or the like. Possibly. but can also be thought of a machining.
  • the legs 11, 12, starting from their edges 9, 10, in the direction of the shirt 3 can also be shown tapering to the bottom 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft einen Tassenstößel eines Ventiltriebs einer Brennkraftmaschine, mit einem an einer Seite durch einen Boden verschlossenen hohlzylindrischen Hemd, welcher Boden an seiner äußeren Stirnfläche eine Anlauffläche für einen Nocken sowie an dessen innerer Stirnfläche eine zentrische Anlage für ein Gaswechselventil aufweist, wobei die Anlauffläche einen in Auswanderungsrichtung des Nockens gesehen zylindrischen Verlauf hat und der Stößel zu dessen Ausrichtung in Bezug auf den Nocken mit Mitteln zur Verdrehsicherung gegenüber dessen Umgebungskonstruktion versehen ist.The invention relates to a tappet of a valve train of an internal combustion engine, with a sealed on one side by a bottom hollow cylindrical shirt, which bottom on its outer face a stop surface for a cam and on its inner face a centric system for a gas exchange valve, wherein the contact surface a seen in the direction of travel of the cam has cylindrical course and the plunger is provided to its orientation with respect to the cam with means for preventing rotation relative to its surrounding structure.

Hintergrund der ErfindungBackground of the invention

Ein derartiger Tassenstößel ist aus der als gattungsbildend betrachteten EP 1 260 679 A3 vorbekannt. Dieser Tassenstößel hat ebenfalls ein hohlzylindrisches Hemd mit einem zylindrisch in Nockenrichtung ausgewölbten Boden. Letztgenannter ist hierbei dünnwandig wie das Hemd dargestellt. Eine innere Stirnfläche folgt im Wesentlichen einer äußeren Stirnfläche des Bodens. Zu erkennen ist, dass das Hemd nur eine verkürzte Führungshöhe hat und, ausgehend von einer oberen Stirnseite des Hemdes, zwei sich gegenüberliegende konkave Seitenwände vorgesehen sind, die aufeinander zulaufen und endseitig einen schmalen Boden für einen Nockenkontakt bilden.Such a tappet is considered from the considered generic EP 1 260 679 A3 previously known. This tappet also has a hollow cylindrical shirt with a cylindrically curved bottom in the cam direction. The latter is here thin-walled as the shirt shown. An inner face substantially follows an outer face of the floor. It can be seen that the shirt has only a shortened leadership height and, starting from an upper end of the shirt, two opposing concave side walls are provided, which converge towards one another and form a narrow base for a cam contact at the end.

Der Stößel ist aufgrund seiner komplizierten Geometrie nicht für eine Massenfertigung geeignet. Außerdem besitzt er nur eine ungenügende Führungslänge zur Aufnahme in der Umgebungskonstruktion. Dem Nocken wird zudem nur ein relativ schmaler Anlaufbereich an der Außenseite des Bodens zur Verfügung gestellt, so dass hier mit vorzeitigem Verschleiß zurechnen ist oder aufwändige Verschleißschutzmassnahmen zum Tragen kommen müssen. Ggf. müssen relativ hohe Wanddicken eingesetzt werden, um Steifigkeitserfordernissen zu genügen.The plunger is not suitable for mass production because of its complicated geometry. In addition, he has only an insufficient guide length for inclusion in the surrounding construction. The cam is also provided only a relatively narrow start-up area on the outside of the floor, so that here is attributable to premature wear or costly wear protection measures must come to fruition. Possibly. For example, relatively high wall thicknesses must be used to meet stiffness requirements.

Aufgabe der ErfindungObject of the invention

Aufgabe der Erfindung ist es daher, einen Tassenstößel der vorbekannten Art zu schaffen, bei welchem die zitierten Nachteile mit einfachen Mitteln beseitigt sind. Insbesondere soll ein Tassenstößel kreiert werden, der sich bei hervorragender Steifigkeit einfach und kostengünstig in Massenproduktion fertigen lässt.The object of the invention is therefore to provide a bucket tappet of the known type, in which the cited disadvantages are eliminated by simple means. In particular, a bucket tappet is to be created, which can be easily and inexpensively mass produced with excellent rigidity.

Lösung der AufgabeSolution of the task

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass die innere Stirnfläche einen von der äußeren Stirnfläche des Bodens abweichenden Verlauf hat und einen radial verlaufenden, planen Steg aufweist, zwischen dessen Kanten die Anlage symmetrisch positioniert ist, wobei sich von jeder Kante ein dachartig vom Boden weg abgeschrägter, aus Vollmaterial bestehender Schenkel an eine Innenseite des Hemdes erstreckt, welche Schenkel sich achssymmetrisch gegenüberliegen und wobei der Steg orthogonal zur zylindrischen Erstreckung der Anlauffläche liegt.According to the invention, this object is achieved in that the inner end face has a deviating from the outer end surface of the bottom course and a radially extending, planar web, between the edges of the system is symmetrically positioned, wherein each edge of a roof like a beveled away from the ground away , consisting of solid material leg extends to an inner side of the shirt, which legs are axially symmetric and the web is orthogonal to the cylindrical extension of the contact surface.

Hierdurch sind die eingangs zitierten Nachteile mit einfachen Mitteln beseitigt. Durch die dachartig abgeschrägten Schenkel nur an der inneren Stirnfläche des Bodens mit dem sich plan erstreckenden Steg wird, wie auch FEM-Berechnungen ergeben haben, ein deutlicher Steifigkeitszuwachs für den Tassenstößel geschaffen. Somit kann dieser insgesamt hinsichtlich seiner Masse reduziert werden, was sich wiederum vorteilhaft auf die oszillierenden Ventiltriebsmassen auswirkt.As a result, the disadvantages cited above are eliminated by simple means. Due to the roof-like beveled legs only on the inner end face of the bottom with the planar extending web, as well as FEM calculations have shown, created a significant increase in stiffness for the tappets. Thus, this total can be reduced in terms of its mass, which in turn has an advantageous effect on the oscillating valve train masses.

Ein Beitrag in Richtung Steifigkeitserhöhung ist auch dadurch geleistet, dass der Steg orthogonal zur zylindrischen Erstreckung der äußeren Stirnfläche des Bodens verläuft. Ggf. kann dieser Steg jedoch auch parallel oder generell lediglich winkelversetzt zu der zylindrischen Erstreckung der äußeren Stirnfläche des Bodens vorliegen.A contribution in the direction of increasing stiffness is also achieved in that the web is orthogonal to the cylindrical extent of the outer end face of the soil. Possibly. However, this web may also be parallel or generally only angularly offset from the cylindrical extension of the outer end face of the soil.

Aufgrund des zylindrischen Verlaufs kann, bei garantierter Auswanderungsfläche für den Nocken auf der äußeren Stirnfläche am Boden, der Durchmesser des Tassenstößels reduziert werden.Due to the cylindrical course can be reduced with guaranteed emigration area for the cam on the outer face on the ground, the diameter of the bucket tappet.

Als Verdrehsicherung ist gemäß einem Unteranspruch beispielsweise eine im Hemd des Tassenstößels angeordnete Rollennadel vorgesehen, welche das Hemd radial nach außen überragt und bei Einbau des Tassenstößels somit in einer Längsnut einer Aufnahmebohrung im Zylinderkopf oder einer ähnlichen Umgebungskonstruktion verläuft. Ggf. kann der Tassenstößel auch selbstzentrierend ausgelegt werden.As anti-rotation is provided according to a subclaim, for example, arranged in a shirt of the tappet roller needle, which projects beyond the shirt radially outward and thus runs during installation of the tappet in a longitudinal groove of a receiving bore in the cylinder head or a similar surrounding construction. Possibly. the bucket tappet can also be designed self-centering.

Zudem ist es vorgeschlagen, die Anlage für das Gaswechselventil auf dem Steg als kegelstumpfähnliche Erhebung darzustellen. Somit ist zum einen eine definierte Anlagefläche, die ggf. auch speziell verschleißgeschützt ausgebildet sein kann, geschaffen. Zum anderen kann die Anlage höhenvariabel für den Montageprozess beim Motorenhersteller bereitgehalten werden.In addition, it is proposed to represent the system for the gas exchange valve on the web as a truncated cone-like elevation. Thus, on the one hand, a defined contact surface, which if necessary can also be designed to be wear-resistant, is created. On the other hand, the system can be kept variable in height for the assembly process at the engine manufacturer.

Alternativ zu der vorgenannten Erhebung ist es gemäß einem weiteren Unteranspruch vorgesehen, die Anlage als tellerartige oder ähnlich ausgebildete Einformung im Steg darzustellen.As an alternative to the aforementioned survey, it is provided according to a further subclaim to represent the plant as a plate-like or similarly formed indentation in the web.

Besonders vorteilhaft ist es, wenn die Anlage gemeinsam oder allein mit der gesamten inneren Stirnfläche des Bodens durch einen spanlosen Fertigungsvorgang wie beispielsweise Prägen, Präge-Fließpressen, Schmieden oder ähnliches gefertigt wird.It is particularly advantageous if the installation is manufactured together or alone with the entire inner end face of the floor by means of a non-cutting production process such as embossing, embossing extrusion, forging or the like.

Die dachartig abgeschrägten Schenkel können neben deren Ausbildung aus "Vollmaterial" auch als dünnwandige und von der inneren Stirnfläche des Bodens abstehende Rippen ausgebildet sein. Aufgrund dieser Maßnahme ist ggf. ein weiterer Beitrag in Richtung Leichtbau und Absenkung der oszillierenden Ventiltriebsmassen geleistet.The roof-like bevelled legs can be formed in addition to their training of "solid material" as a thin-walled and projecting from the inner end face of the soil ribs. Due to this measure, another contribution may be made in the direction of lightweight construction and lowering of the oscillating valve train masses.

Schließlich sind spezielle Verlaufsformen der dachartig abgeschrägten Schenkel vorgeschlagen. Diese können beispielsweise konkav oder konvex gekrümmt verlaufen oder eine im wesentlichen plane Erstreckung haben. Der Fachmann wird an dieser Stelle durch die ihm geläufigen Berechnungs- und Auslegungsmethoden die geeignete Form der Schenkel für seinen Anwendungsfall finden.Finally, special courses of the roof-like tapered legs are proposed. These may, for example, run concavely or convexly curved or have a substantially planar extension. The skilled person will find at this point by the familiar calculation and design methods, the appropriate shape of the legs for his application.

Der Schutzbereich dieser Erfindung bezieht sich zwar insbesondere auf Tassenstößel mit mechanischem Spielausgleich, jedoch kann bei spezieller Anpassung der Tassenstößel auch hydraulisch ausgelegt sein.Although the scope of this invention relates in particular to bucket tappets with mechanical clearance compensation, however, with special adaptation of the bucket tappet may also be designed hydraulically.

Kurze Beschreibung der ZeichnungShort description of the drawing

Die Erfindung ist zweckmäßigerweise anhand der Zeichnung näher erläutert. Es zeigen:

Figur 1
eine Unteransicht auf einen Tassenstößel;
Figur 2
einen Längsschnitt durch den Tassenstößel nach Figur 1 und die
Figuren 3, 4
eine alternative Ausgestaltung zu dem Tassenstößel wie vorgenannt.
The invention is suitably explained in more detail with reference to the drawing. Show it:
FIG. 1
a bottom view of a tappet;
FIG. 2
a longitudinal section through the tappets after FIG. 1 and the
FIGS. 3, 4
an alternative embodiment of the bucket tappet as mentioned above.

Ausführliche Beschreibung der ZeichnungDetailed description of the drawing

Die Figuren offenbaren einen Tassenstößel 1 eines Ventiltriebs einer Brennkraftmaschine. Dieser besteht aus einem an einer Seite durch einen Boden 2 verschlossenen hohlzylindrischen Hemd 3. Der Boden 2 hat eine äußere Stirnfläche 4. Diese ist als Anlauffläche 5 für einen nicht dargestellten Nocken ausgebildet. Dabei soll die Anlauffläche 5 einen in Auswanderungsrichtung A des Nockens gesehen zylindrischen Verlauf haben. Um eine stetige Ausrichtung des Tassenstößels 1 in Bezug auf den Nocken zu garantieren, ist, wie näher aus Figur 4 hervorgeht, im Hemd 3 eine Aussparung 14 vorgesehen. In dieser Aussparung 14 verläuft ein nicht näher dargestelltes Mittel 13a zur Verdrehsicherung. Dieses kann beispielsweise eine in die Aussparung 14 eingepresste Rollennadel sein, die radial etwas über das Hemd 3 hinaussteht und bei Einbau des Tassenstößels 1 in seine entsprechende Aufnahme im Zylinderkopf in einer dort applizierten Längsnut verläuft.The figures disclose a bucket tappet 1 of a valve train of an internal combustion engine. This consists of a closed on one side by a bottom 2 hollow cylindrical shirt 3. The bottom 2 has an outer end face 4. This is designed as a contact surface 5 for a cam, not shown. Here, the contact surface 5 should have a cylindrical course seen in the direction of emigration A of the cam. To ensure a steady alignment of the bucket tappet 1 with respect to the cam is, as closer FIG. 4 shows, in the shirt 3 a recess 14 is provided. In this recess 14 a not shown in detail means 13a extends to prevent rotation. This can be, for example, a roller needle pressed into the recess 14, which protrudes slightly radially beyond the shirt 3 and, when the tappet 1 is installed, extends into its corresponding receptacle in the cylinder head in a longitudinal groove applied there.

Wie insbesondere den Figuren 2, 4 zu entnehmen ist, hat eine innere Stirnfläche 6 des Bodens 2 einen deutlich von der äußeren Stirnfläche 4 abweichenden Verlauf. Dabei ist an der inneren Stirnfläche 6 ein radial verlaufender, flacher Steg 8 appliziert. Mittig am Steg 8, jedoch vorteilhafterweise beabstandet zu dessen Kanten 9, 10, ist eine Anlage 7 für ein Gaswechselventil vorgesehen. Diese kann, wie insbesondere aus den Figuren 3, 4 hervorgeht, beispielsweise als kegelstumpfähnliche Erhebung auf dem Steg 8 dargestellt sein. Erwähnt werden muss, dass die Anlage 7 vorteilhafterweise in einem spanlosen Fertigungsvorgang wie Prägen generiert wird.As in particular the FIGS. 2, 4 can be seen, an inner end face 6 of the bottom 2 has a significantly different from the outer face 4 course. In this case, a radially extending, flat web 8 is applied to the inner end face 6. Centered on the web 8, but advantageously spaced from the edges 9, 10, a system 7 is provided for a gas exchange valve. This can, as in particular from the FIGS. 3, 4 emerges, for example, be shown as a truncated cone-like elevation on the web 8. It must be mentioned that the plant 7 is advantageously generated in a chipless production process such as embossing.

Wie sich der Fachmann des weiteren den Figuren entnehmen kann, geht von jeder der vorgenannten Kanten 9, 10 je ein dachartig vom Boden 2 weg abgeschrägter Schenkel 11, 12 auf eine Innenseite 13 des Hemdes 3 zu. Dabei können die Schenkel 11, 12, so wie in Figur 2 gezeigt, einen leicht konkaven Verlauf aufweisen. Es ist jedoch auch vorgesehen, dass diese eine flache Dachform, so wie in Figur 4 offenbart, haben.As the person skilled in the art can further deduce from the figures, one of each of the abovementioned edges 9, 10 is each a leg-like beveled from the bottom 2 away leg 11, 12 to an inner side 13 of the shirt 3. In this case, the legs 11, 12, as in FIG. 2 shown to have a slightly concave course. However, it is also envisaged that these are a flat roof shape, as in FIG. 4 revealed, have.

Besonders vorteilhaft ist es, wenn die gesamte innere Stirnfläche 6 des Bodens 2 mit dem Steg 8 in einem oder in mehreren Arbeitsschritten in einem spanlosen Herstellverfahren wie Prägen oder Fließpressen o. ä. hergestellt wird. Ggf. kann jedoch auch an eine spanende Bearbeitung gedacht werden.It is particularly advantageous if the entire inner end face 6 of the base 2 is produced with the web 8 in one or more work steps in a non-cutting production method, such as embossing or extruding, or the like. Possibly. but can also be thought of a machining.

Aufgrund des sich radial erstreckenden Steges 8 an der inneren Stirnfläche 6 des Bodens 2 in Verbindung mit den dachartig abgeschrägten Schenkeln 11, 12 liegt ein hinsichtlich seiner Steifigkeit erhöhter Tassenstößel 1 vor. Somit kann dessen Gewicht verringert werden. Der Fachmann wird diesen Auslegungsprozess solange iterieren, bis er ein Optimum an Leichtbau gefunden hat.Due to the radially extending web 8 on the inner end face 6 of the bottom 2 in conjunction with the roof-like bevelled legs 11, 12 is an increased in terms of rigidity tappets 1 before. Thus, its weight can be reduced. The skilled person will iterate this design process until he has found an optimum in lightweight construction.

Alternativ können die Schenkel 11, 12, ausgehend von ihren Kanten 9, 10, in Richtung zum Hemd 3 auch auf den Boden 2 zulaufend dargestellt sein.Alternatively, the legs 11, 12, starting from their edges 9, 10, in the direction of the shirt 3 can also be shown tapering to the bottom 2.

Liste der Bezugszahlen und -zeichenList of reference numbers and symbols

11
Tassenstößeltappets
22
Bodenground
33
Hemdshirt
44
Stirnflächeface
55
Anlaufflächeapproach surface
66
Stirnflächeface
77
Anlageinvestment
88th
Stegweb
99
Kanteedge
1010
Kanteedge
1111
Schenkelleg
1212
Schenkelleg
1313
Innenseiteinside
13a13a
Mittel zur VerdrehsicherungAnti-rotation device
1414
Aussparungrecess
AA
Auswanderungsrichtung NockenEmigration direction cams

Claims (7)

  1. Bucket tappet (1) of a valve timing mechanism of an internal combustion engine, having a hollow-cylindrical skirt (3) which is closed on one side by a head (2), which head (2) has a thrust surface (5) for a cam on its outer end face (4) and a central rest (7) for a gas exchange valve on its inner end face (6), the thrust surface (5) having a cylindrical profile as viewed in the excursion direction (A) of the cam, and the tappet (1) being provided with means (13a) for safeguarding against rotation with respect to its surrounding construction, for the orientation of the said tappet (1) in relation to the cam, characterized in that the inner end face (6) has a profile, which deviates from the outer end face (4) of the head (2), and has a radially extending, planar web (8), between the edges (9, 10) of which the rest (7) is positioned symmetrically, a limb (11, 12) which is bevelled away from the head (2) in a roof-like manner and is composed of solid material extending from each edge (9, 10) to an inner side (13) of the skirt (3), which limbs (11, 12) lie opposite one another in an axially symmetrical manner, and the web (8) lying orthogonally with respect to the cylindrical extent of the thrust surface (5).
  2. Bucket tappet according to Claim 1, characterized in that a body which is fastened in a cut-out (14) of the skirt (3) and projects beyond the latter at least radially to the outside, such as a roller needle, a pin or a pin-like element, is provided as means (13a) for safeguarding against rotation.
  3. Bucket tappet according to Claim 1, characterized in that the rest (7) for the gas exchange valve is presented as a frustoconical elevation on the web (8).
  4. Bucket tappet according to Claim 1, characterized in that the rest (7) for the gas exchange valve is configured as a plate-like formed recess in the web (8).
  5. Bucket tappet according to Claim 1, characterized in that the entire inner end face (6) of the head (2) with the web (8) is provided by a chipless production process such as stamping or extrusion.
  6. Bucket tappet according to Claim 1, characterized in that the limbs (11, 12) which are bevelled in a roof-like manner are curved substantially concavely or convexly.
  7. Bucket tappet according to Claim 1, characterized in that the limbs (11, 12) which are bevelled in a roof-like manner extend substantially flatly.
EP05009745A 2004-05-25 2005-05-04 Valve lifter for an internal combustion engine Not-in-force EP1600609B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004025532A DE102004025532A1 (en) 2004-05-25 2004-05-25 Cup tappet of a valve train of an internal combustion engine
DE102004025532 2004-05-25

Publications (3)

Publication Number Publication Date
EP1600609A2 EP1600609A2 (en) 2005-11-30
EP1600609A3 EP1600609A3 (en) 2008-10-15
EP1600609B1 true EP1600609B1 (en) 2011-10-05

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EP05009745A Not-in-force EP1600609B1 (en) 2004-05-25 2005-05-04 Valve lifter for an internal combustion engine

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US (1) US7143731B2 (en)
EP (1) EP1600609B1 (en)
DE (1) DE102004025532A1 (en)

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US7143731B2 (en) 2006-12-05
US20050263119A1 (en) 2005-12-01
EP1600609A2 (en) 2005-11-30
EP1600609A3 (en) 2008-10-15
DE102004025532A1 (en) 2005-12-15

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