EP3396123A1 - Pushrod for a valve drive of a combustion engine - Google Patents

Pushrod for a valve drive of a combustion engine Download PDF

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Publication number
EP3396123A1
EP3396123A1 EP18166360.0A EP18166360A EP3396123A1 EP 3396123 A1 EP3396123 A1 EP 3396123A1 EP 18166360 A EP18166360 A EP 18166360A EP 3396123 A1 EP3396123 A1 EP 3396123A1
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EP
European Patent Office
Prior art keywords
bumper
shaft
rib structure
combustion engine
rib
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
EP18166360.0A
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German (de)
French (fr)
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EP3396123B1 (en
Inventor
Bernd Huneke
Manuel Stenglein
Thomas Schneider
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.)
MAN Truck and Bus SE
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MAN Truck and Bus SE
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Publication date
Application filed by MAN Truck and Bus SE filed Critical MAN Truck and Bus SE
Publication of EP3396123A1 publication Critical patent/EP3396123A1/en
Application granted granted 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
    • 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
    • F01L1/146—Push-rods
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements

Definitions

  • the invention relates to a bumper for a valve train of an internal combustion engine.
  • the invention further relates to a valve train of an internal combustion engine, comprising such a bumper, in particular a valve train for an internal combustion engine with a lateral or lower camshaft.
  • the invention further relates to such an internal combustion engine, for.
  • an engine in particular for a vehicle, for.
  • the invention further relates to a vehicle, in particular a motor vehicle, for.
  • a vehicle in particular a motor vehicle, for.
  • a commercial vehicle a watercraft, or a rail vehicle with a bumper or a valve train as described in this document.
  • a bumper for a valve train forms the transfer member in the drive mechanism from the camshaft to the valves. Colloquially, the term push rod is often used for the bumper.
  • the bumper in an internal combustion engine is part of the valve control on engines, especially in engines with side or bottom camshaft.
  • Known bumpers consist of a cylindrical shaft, at the ends of ball heads or ball pans are provided.
  • the AT 005 130 U1 a push rod having a region of maximum cross section, preferably arranged centrally between the ends of the push rod, wherein the bumper consists of a first and a second, substantially hollow rod part; These rod parts each have a maximum cross-section in the region of an open end face, wherein the rod parts are connected to one another at their open end faces (2b, 3b) in an insoluble manner.
  • a bumper in particular for a valve train of an internal combustion engine is provided, whose shaft has a rib structure.
  • a rib structure to increase the buckling stiffness of a defined portion of the bumper, an increase in the buckling resistance of the bumper is achieved compared to a cylindrical design of the shaft of the bumper.
  • a weight reduction can be achieved, which among other things, the valve train dynamics is improved.
  • Another advantage of this bumper design is the use of the bumper even in space-critical areas by the taper of the push rod in less kink-prone areas.
  • the rib structure offers more flexibility, compared to the known from the prior art biconical or "bulbous" design of the shaft with similar buckling resistance more flexibility to adapt the dimensions of the bumper in space critical areas to the prevailing space requirements.
  • the length of the rib structure the number and / or size of the ribs of the rib structure can be adjusted. The distance between the beginning and the end of the ribs can thus be selected appropriately depending on the space in the engine.
  • the rib structure has a plurality of radially projecting ribs extending in the longitudinal direction of the shank.
  • a plurality of at least approximately axially parallel to the central axis of the shaft extending ribs may be provided.
  • the ribs can protrude the same or different distances in the radial direction.
  • An advantageous variant provides that the ribs protrude equally far in the radial direction.
  • the number of ribs of the rib structure may be in the range of three to twelve, more preferably in the range of four to eight.
  • the rib structure is arranged in a region arranged between the ends of the bumper.
  • a preferred embodiment provides that the rib structure is arranged in a central region of the shaft.
  • the rib structure can be arranged only in the middle region, so that no rib structure is arranged at the two opposite ends of the bumper.
  • a possible embodiment provides here that the rib structure is arranged only in a central region of the shaft, which corresponds to at most 2/3, more preferably at most half of a length of the shaft.
  • the bumper to be tapered in a less kink-prone area at the ends of the bumper. This is also advantageous for the arrangement in a space-critical area between the push rod and the cylinder head of the internal combustion engine.
  • the rib structure may be made integral with the stem, which is advantageous for reasons of stability and in terms of the production of the bumper.
  • a thickness of at least one rib of the rib structure in the radial direction away from the shank can decrease at least in sections.
  • a rib of the rib structure may have the shape of a wedge or rectangle in cross-section. Furthermore, a rib of the rib structure may have rounded corners on the radially outer edge of the rib.
  • an outer side of the ribs of the rib structure in cross section may have the shape of a circular section with the radius of the shaft in the region of the rib structure.
  • the radius of the shaft in this area includes the height of the ribs in this area.
  • the two edges extending inwardly from an outside of the ribs may be tapered inwardly to widen.
  • the ends of the shaft of the bumper may be provided with a ball head or a ball socket.
  • the bumper can be made of a conventional construction or tool steel.
  • the bumper and / or the shaft of the bumper may be made as a drawn tube with ribs, the shaft at its two opposite ends is turned free.
  • the bumper and / or the shaft of the bumper may be made as a drawn round material with ribs and be turned free at the ends of the shaft.
  • the bumper and / or the shaft can also be forged as a round material or formed as a round material.
  • the rib structure may leak straight or "bulbous" on the shaft.
  • the rib structure can be designed with or without bevel.
  • the invention further relates to a valve train of an internal combustion engine, comprising a bumper as described in this document, in particular a valve train for an internal combustion engine with lateral or lower camshaft.
  • the invention further relates to such an internal combustion engine, for.
  • an engine in particular for a vehicle, for.
  • a motor vehicle, commercial vehicle, watercraft, rail vehicle or power generation comprising a bumper as described in this document.
  • the invention further relates to a vehicle, in particular a motor vehicle, for.
  • a vehicle in particular a motor vehicle, for.
  • a commercial vehicle a watercraft, or a rail vehicle with a bumper or a valve train as described in this document.
  • FIG. 1 shows a bumper 1 according to an embodiment of the invention.
  • the bumper 1 can be used in a valve train for an internal combustion engine and in this case form the transmission member in the drive mechanism of the side or bottom camshaft to the gas exchange valves. Colloquially, the term push rod is often used for the bumper.
  • the bumper 1 comprises a shaft 2, at the ends of a ball head 6 or a ball socket 5 are provided.
  • a middle region 2b of the shaft 2 has a rib structure 3.
  • the rib structure 3 is formed by a plurality of radially projecting, extending in the longitudinal direction L of the shaft 2 ribs 4, wherein the rib structure 3 is integral with the shaft 2.
  • the longitudinal direction here corresponds to the longitudinal axis L of the shaft 2.
  • a radial direction is perpendicular to the longitudinal axis L.
  • the two opposite end portions 2a of the shaft 2 follow, which are cylindrical.
  • the rib structure 3 is also in FIG. 2 shown having a cross section along BB in FIG. 1 shows.
  • the rib structure has four ribs 4, which extend in the longitudinal direction parallel to the longitudinal axis L of the shank and protrude equally far in the radial direction.
  • a thickness of the ribs 4 of the rib structure 3 decreases away from the shaft in the radial direction R at least in sections.
  • the ribs 4 have in cross section the shape of a wedge or rectangle with rounded corners on the radially outer edge 4a. The two edges, which extend inwardly from an outer side 4a of a rib 4, are bevelled inwardly to widen.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Gears, Cams (AREA)

Abstract

Die Erfindung betrifft eine Stoßstange für einen Ventiltrieb einer Brennkraftmaschine. Die Erfindung betrifft ferner einen Ventiltrieb und ein Kraftfahrzeug, insbesondere ein Nutzfahrzeug mit einer solchen Stoßstange. Die Stoßstange (1) zeichnet sich dadurch aus, dass zur Erhöhung der Knicksteifigkeit ein Schaft (2) der Stoßstange (1) eine Rippenstruktur (3) aufweist.The invention relates to a bumper for a valve train of an internal combustion engine. The invention further relates to a valve train and a motor vehicle, in particular a commercial vehicle with such a bumper. The bumper (1) is characterized in that, to increase the buckling rigidity, a shaft (2) of the bumper (1) has a ribbed structure (3).

Description

Die Erfindung betrifft eine Stoßstange für einen Ventiltrieb einer Brennkraftmaschine.The invention relates to a bumper for a valve train of an internal combustion engine.

Die Erfindung betrifft ferner einen Ventiltrieb einer Brennkraftmaschine, umfassend eine solche Stoßstange, insbesondere einen Ventiltrieb für einen Verbrennungsmotor mit seitlicher oder unten liegender Nockenwelle. Die Erfindung betrifft ferner eine derartige Brennkraftmaschine, z. B. ein Motor, insbesondere für ein Fahrzeug, z. B. ein Kraftfahrzeug, Nutzfahrzeug, Wasserfahrzeug, Schienenfahrzeug oder eine Brennkraftmaschine zur Stromerzeugung, umfassend eine solche Stoßstange.The invention further relates to a valve train of an internal combustion engine, comprising such a bumper, in particular a valve train for an internal combustion engine with a lateral or lower camshaft. The invention further relates to such an internal combustion engine, for. As an engine, in particular for a vehicle, for. As a motor vehicle, commercial vehicle, watercraft, rail vehicle or an internal combustion engine for power generation, comprising such a bumper.

Die Erfindung betrifft ferner ein Fahrzeug, insbesondere ein Kraftfahrzeug, z. B. Nutzfahrzeug, ein Wasserfahrzeug, oder ein Schienenfahrzeug mit einer Stoßstange oder einem Ventiltrieb wie in diesem Dokument beschrieben.The invention further relates to a vehicle, in particular a motor vehicle, for. As a commercial vehicle, a watercraft, or a rail vehicle with a bumper or a valve train as described in this document.

Eine Stoßstange für einen Ventiltrieb bildet das Übertragungsglied im Antriebsmechanismus von der Nockenwelle zu den Ventilen. Umgangssprachlich wird für die Stoßstange häufig der Begriff Stößelstange verwendet. Die Stoßstange in einem Verbrennungsmotor ist Teil der Ventilsteuerung an Motoren, insbesondere bei Motoren mit seitlicher oder unten liegender Nockenwelle. Bekannte Stoßstangen bestehen aus einem zylinderförmigen Schaft, an dessen Enden Kugelköpfe oder Kugelpfannen vorgesehen sind.A bumper for a valve train forms the transfer member in the drive mechanism from the camshaft to the valves. Colloquially, the term push rod is often used for the bumper. The bumper in an internal combustion engine is part of the valve control on engines, especially in engines with side or bottom camshaft. Known bumpers consist of a cylindrical shaft, at the ends of ball heads or ball pans are provided.

Zur Erhöhung der Knicksteifigkeit ist es aus dem Stand der Technik bekannt, den Schaft der Stoßstange nicht rohr- oder zylinderförmig auszuführen, sondern einen Abschnitt des Schafts durch eine doppelkonische Formgebung in einem mittleren Bereich der Stoßstange knickfester auszuführen, wie es beispielsweise in der AT 005 130 U1 , der US 4,850,315 A oder der US 5,027,763 A beschrieben ist. So offenbart die AT 005 130 U1 eine Stößelstange mit einem vorzugsweise mittig zwischen den Enden der Stößelstange angeordneten Bereich maximalen Querschnittes, wobei die Stoßstange aus einem ersten und einem zweiten, im Wesentlichen hohl ausgeführten Stangenteil besteht; diese Stangenteile weisen jeweils einen maximalen Querschnitt im Bereich einer offenen Stirnseite auf, wobei die Stangenteile an ihren offenen Stirnseiten (2b, 3b) miteinander unlöslich verbunden sind.To increase the buckling resistance, it is known from the prior art not to perform the shaft of the bumper tube or cylindrical, but perform a portion of the shaft by a biconical design in a central region of the bumper kinkfester, as for example in the AT 005 130 U1 , of the US 4,850,315 A or the US 5,027,763 A is described. So revealed the AT 005 130 U1 a push rod having a region of maximum cross section, preferably arranged centrally between the ends of the push rod, wherein the bumper consists of a first and a second, substantially hollow rod part; These rod parts each have a maximum cross-section in the region of an open end face, wherein the rod parts are connected to one another at their open end faces (2b, 3b) in an insoluble manner.

Es ist eine Aufgabe der Erfindung, den bekannten Stand der Technik weiterzubilden, um eine Stoßstange mit hoher Knickfestigkeit bereitzustellen, die in Ventiltrieben mit beschränktem Bauraum flexibel einsetzbar ist.It is an object of the invention to develop the known prior art to provide a bumper with high buckling strength, which is flexible in valve drives with limited space.

Diese Aufgaben werden durch eine Stoßstange mit den Merkmalen des unabhängigen Anspruchs gelöst. Vorteilhafte Ausführungsformen und Anwendungen der Erfindung sind Gegenstand der abhängigen Ansprüche und werden in der folgenden Beschreibung unter teilweiser Bezugnahme auf die Figuren näher erläutert.These objects are achieved by a bumper having the features of the independent claim. Advantageous embodiments and applications of the invention are the subject matter of the dependent claims and are explained in more detail in the following description with partial reference to the figures.

Gemäß allgemeinen Gesichtspunkten der Erfindung wird eine Stoßstange, insbesondere für einen Ventiltrieb einer Brennkraftmaschine, bereitgestellt, deren Schaft eine Rippenstruktur aufweist.According to general aspects of the invention, a bumper, in particular for a valve train of an internal combustion engine is provided, whose shaft has a rib structure.

Durch das Verrippen, d. h. das Vorsehen einer Rippenstruktur zur Erhöhung der Knicksteifigkeit eines definierten Bereichs der Stoßstange, wird eine Erhöhung der Knicksicherheit der Stoßstange erreicht im Vergleich zu einer zylinderförmigen Ausführung des Schafts der Stoßstange. Darüber hinaus lässt sich eine Gewichtsreduktion erzielen, wodurch unter anderem die Ventiltriebsdynamik verbessert wird. Ein weiterer Vorteil dieser Stoßstangenausführung ist die Verwendung der Stoßstange auch in bauraumkritischen Bereichen durch die Verjüngung der Stößelstange in weniger knickanfälligen Bereichen. Insbesondere bietet die Rippenstruktur im Vergleich zu der aus dem Stand der Technik bekannten doppelkonischen oder "bauchigen" Ausführung des Schaftes bei ähnlich guter Knicksteifigkeit mehr Flexibilität, die Abmaße der Stoßstange in bauraumkritischen Bereichen an den vorherrschenden Platzbedarf anzupassen. Je nach verfügbarem Bauraum kann beispielsweise die Länge der Rippenstruktur, die Anzahl und/oder Größe der Rippen der Rippenstruktur angepasst werden. Der Abstand des Beginns und des Endes der Rippen kann somit zweckmäßig in Abhängigkeit von dem Bauraum im Motor gewählt werden.By the ribbing, d. H. the provision of a rib structure to increase the buckling stiffness of a defined portion of the bumper, an increase in the buckling resistance of the bumper is achieved compared to a cylindrical design of the shaft of the bumper. In addition, a weight reduction can be achieved, which among other things, the valve train dynamics is improved. Another advantage of this bumper design is the use of the bumper even in space-critical areas by the taper of the push rod in less kink-prone areas. In particular, the rib structure offers more flexibility, compared to the known from the prior art biconical or "bulbous" design of the shaft with similar buckling resistance more flexibility to adapt the dimensions of the bumper in space critical areas to the prevailing space requirements. Depending on the available space, for example, the length of the rib structure, the number and / or size of the ribs of the rib structure can be adjusted. The distance between the beginning and the end of the ribs can thus be selected appropriately depending on the space in the engine.

Gemäß einer besonders bevorzugten Ausführungsform weist die Rippenstruktur mehrere radial abstehende, sich in Längsrichtung des Schaftes erstreckende Rippen auf. Mit anderen Worten können mehrere zumindest annähernd achsparallel zur Mittelachse des Schaftes verlaufende Rippen vorgesehen sein. Die Rippen können gleich oder unterschiedlich weit in radialer Richtung auskragen. Eine vorteilhafte Variante sieht vor, dass die Rippen sich gleich weit in radialer Richtung auskragen.According to a particularly preferred embodiment, the rib structure has a plurality of radially projecting ribs extending in the longitudinal direction of the shank. In other words, a plurality of at least approximately axially parallel to the central axis of the shaft extending ribs may be provided. The ribs can protrude the same or different distances in the radial direction. An advantageous variant provides that the ribs protrude equally far in the radial direction.

Die Anzahl der Rippen der Rippenstruktur kann im Bereich von drei bis zwölf liegen, weiter vorzugsweise im Bereich von vier bis acht liegen.The number of ribs of the rib structure may be in the range of three to twelve, more preferably in the range of four to eight.

Die Rippenstruktur ist in einem zwischen den Enden der Stoßstange angeordneten Bereich angeordnet. Eine bevorzugte Ausführungsform sieht vor, dass die Rippenstruktur in einem mittleren Bereich des Schafts angeordnet ist. Hierbei kann die Rippenstruktur nur in den mittleren Bereich angeordnet sein, so dass an den beiden gegenüberliegenden Enden der Stoßstange keine Rippenstruktur angeordnet ist. Eine mögliche Ausführung sieht hierbei vor, dass die Rippenstruktur lediglich in einem mittleren Bereich des Schafts angeordnet ist, der höchstens 2/3, weiter vorzugsweise höchstens der Hälfte einer Länge des Schafts entspricht.The rib structure is arranged in a region arranged between the ends of the bumper. A preferred embodiment provides that the rib structure is arranged in a central region of the shaft. In this case, the rib structure can be arranged only in the middle region, so that no rib structure is arranged at the two opposite ends of the bumper. A possible embodiment provides here that the rib structure is arranged only in a central region of the shaft, which corresponds to at most 2/3, more preferably at most half of a length of the shaft.

Dadurch kann die Stoßstange in einem weniger knickanfälligen Bereich an den Enden der Stoßstange verjüngend ausgeführt werden. Dies ist ferner vorteilhaft zur Anordnung in einem bauraumkritischen Bereich zwischen Stößelstange und Zylinderkopf der Brennkraftmaschine.This allows the bumper to be tapered in a less kink-prone area at the ends of the bumper. This is also advantageous for the arrangement in a space-critical area between the push rod and the cylinder head of the internal combustion engine.

Gemäß einem weiteren Aspekt kann die Rippenstruktur einstückig mit dem Schaft ausgeführt sein, was vorteilhaft aus Stabilitätsgründen und im Hinblick auf die Herstellung der Stoßstange ist.According to a further aspect, the rib structure may be made integral with the stem, which is advantageous for reasons of stability and in terms of the production of the bumper.

Gemäß einem weiteren Aspekt kann eine Dicke zumindest einer Rippe der Rippenstruktur in radialer Richtung vom Schaft weg zumindest abschnittsweise abnehmen.According to a further aspect, a thickness of at least one rib of the rib structure in the radial direction away from the shank can decrease at least in sections.

Gemäß einem weiteren Aspekt kann eine Rippe der Rippenstruktur im Querschnitt die Form eines Keils oder Rechtecks aufweisen. Ferner kann eine Rippe der Rippenstruktur abgerundete Ecken an der radial außen liegenden Kante der Rippe aufweisen.In another aspect, a rib of the rib structure may have the shape of a wedge or rectangle in cross-section. Furthermore, a rib of the rib structure may have rounded corners on the radially outer edge of the rib.

Gemäß einem weiteren Aspekt kann eine Außenseite der Rippen der Rippenstruktur im Querschnitt die Form eines Kreisabschnittes mit dem Radius des Schafts im Bereich der Rippenstruktur aufweisen. Der Radius des Schafts in diesem Bereich umfasst die Höhe der Rippen in diesem Bereich. Ferner können die beiden Kanten, die sich von einer Außenseite der Rippen nach innen erstrecken, nach innen sich erweiternd abgeschrägt sein.According to a further aspect, an outer side of the ribs of the rib structure in cross section may have the shape of a circular section with the radius of the shaft in the region of the rib structure. The radius of the shaft in this area includes the height of the ribs in this area. Further, the two edges extending inwardly from an outside of the ribs may be tapered inwardly to widen.

Die Enden des Schafts der Stoßstange können mit einem Kugelkopf oder einer Kugelpfanne versehen sein. Die Stoßstange kann aus einem herkömmlichen Bau- oder Werkzeugstahl gefertigt sein. Die Stoßstange und/oder der Schaft der Stoßstange kann als gezogenes Rohr mit Rippen hergestellt sein, wobei der Schaft an seinen beiden gegenüberliegenden Enden freigedreht ist. Die Stoßstange und/oder der Schaft der Stoßstange kann als gezogenes Rundmaterial mit Rippen hergestellt sein und an den Enden des Schafts freigedreht sein. Die Stoßstange und/oder der Schaft kann ferner als Rundmaterial geschmiedet oder als Rundmaterial umgeformt sein.The ends of the shaft of the bumper may be provided with a ball head or a ball socket. The bumper can be made of a conventional construction or tool steel. The bumper and / or the shaft of the bumper may be made as a drawn tube with ribs, the shaft at its two opposite ends is turned free. The bumper and / or the shaft of the bumper may be made as a drawn round material with ribs and be turned free at the ends of the shaft. The bumper and / or the shaft can also be forged as a round material or formed as a round material.

Die Rippenstruktur kann gerade oder "bauchig" am Schaft auslaufen. Die Rippenstruktur kann mit oder ohne Fase ausgeführt sein.The rib structure may leak straight or "bulbous" on the shaft. The rib structure can be designed with or without bevel.

Die Erfindung betrifft ferner einen Ventiltrieb einer Brennkraftmaschine, umfassend eine Stoßstange wie in diesem Dokument beschrieben, insbesondere einen Ventiltrieb für einen Verbrennungsmotor mit seitlicher oder unten liegender Nockenwelle. Die Erfindung betrifft ferner eine derartige Brennkraftmaschine, z. B. ein Motor, insbesondere für ein Fahrzeug, z. B. ein Kraftfahrzeug, Nutzfahrzeug, Wasserfahrzeug, Schienenfahrzeug oder zur Stromerzeugung, umfassend eine Stoßstange wie in diesem Dokument beschrieben.The invention further relates to a valve train of an internal combustion engine, comprising a bumper as described in this document, in particular a valve train for an internal combustion engine with lateral or lower camshaft. The invention further relates to such an internal combustion engine, for. As an engine, in particular for a vehicle, for. As a motor vehicle, commercial vehicle, watercraft, rail vehicle or power generation, comprising a bumper as described in this document.

Die Erfindung betrifft ferner ein Fahrzeug, insbesondere ein Kraftfahrzeug, z. B. Nutzfahrzeug, ein Wasserfahrzeug, oder ein Schienenfahrzeug mit einer Stoßstange oder einem Ventiltrieb wie in diesem Dokument beschrieben.The invention further relates to a vehicle, in particular a motor vehicle, for. As a commercial vehicle, a watercraft, or a rail vehicle with a bumper or a valve train as described in this document.

Die zuvor beschriebenen bevorzugten Ausführungsformen und Merkmale der Erfindung sind beliebig miteinander kombinierbar. Weitere Einzelheiten und Vorteile der Erfindung werden im Folgenden unter Bezug auf die beigefügten Zeichnungen beschrieben. Es zeigen:

Figur 1
eine Stoßstange gemäß einer Ausführungsform der Erfindung; und
Figur 2
einen Querschnitt entlang B-B in Figur 1.
The preferred embodiments and features of the invention described above can be combined with one another as desired. Further details and advantages of the invention will be described below with reference to the accompanying drawings. Show it:
FIG. 1
a bumper according to an embodiment of the invention; and
FIG. 2
a cross section along BB in FIG. 1 ,

Gleiche oder funktional äquivalente Elemente sind in allen Figuren mit denselben Bezugszeichen bezeichnet.Identical or functionally equivalent elements are denoted by the same reference numerals in all figures.

Figur 1 zeigt eine Stoßstange 1 gemäß einer Ausführungsform der Erfindung. FIG. 1 shows a bumper 1 according to an embodiment of the invention.

Die Stoßstange 1 kann in einem Ventiltrieb für einen Verbrennungsmotor zum Einsatz kommen und hierbei das Übertragungsglied im Antriebsmechanismus von der seitlich oder unten gelegenen Nockenwelle zu den Gaswechselventilen bilden. Umgangssprachlich wird für die Stoßstange häufig der Begriff Stößelstange verwendet.The bumper 1 can be used in a valve train for an internal combustion engine and in this case form the transmission member in the drive mechanism of the side or bottom camshaft to the gas exchange valves. Colloquially, the term push rod is often used for the bumper.

Die Stoßstange 1 umfasst einen Schaft 2, an dessen Enden ein Kugelkopf 6 oder eine Kugelpfanne 5 vorgesehen sind.The bumper 1 comprises a shaft 2, at the ends of a ball head 6 or a ball socket 5 are provided.

In der gezeigten Ausführungsvariante der Figur 1 weist ein mittlerer Bereich 2b des Schafts 2 eine Rippenstruktur 3 auf. Hierbei ist die Rippenstruktur 3 durch mehrere radial abstehende, sich in Längsrichtung L des Schaftes 2 erstreckende Rippen 4 gebildet, wobei die Rippenstruktur 3 einstückig mit dem Schaft 2 ausgeführt ist.In the embodiment of the shown FIG. 1 a middle region 2b of the shaft 2 has a rib structure 3. Here, the rib structure 3 is formed by a plurality of radially projecting, extending in the longitudinal direction L of the shaft 2 ribs 4, wherein the rib structure 3 is integral with the shaft 2.

Die Längsrichtung entspricht hier der Längsachse L des Schafts 2. Eine Radialrichtung ist senkrecht zur Längsachse L. An den mittleren Bereich 2b des Schafts 2 schließen sich die beiden gegenüberliegenden Endbereiche 2a des Schafts 2 an, die zylinderförmig ausgeführt sind.The longitudinal direction here corresponds to the longitudinal axis L of the shaft 2. A radial direction is perpendicular to the longitudinal axis L. At the central region 2b of the shaft 2, the two opposite end portions 2a of the shaft 2 follow, which are cylindrical.

Die Rippenstruktur 3 ist auch in Figur 2 gezeigt, die einen Querschnitt entlang B-B in Figur 1 zeigt.The rib structure 3 is also in FIG. 2 shown having a cross section along BB in FIG. 1 shows.

Vorliegend weist die Rippenstruktur vier Rippen 4 auf, die in Längsrichtung parallel zur Längsachse L des Schaftes verlaufen und gleich weit in radialer Richtung auskragen. Lediglich beispielhaft nimmt eine Dicke der Rippen 4 der Rippenstruktur 3 in radialer Richtung R vom Schaft weg zumindest abschnittsweise ab. Die Rippen 4 weisen im Querschnitt die Form eines Keils oder Rechtecks mit abgerundeten Ecken an der radial außen liegenden Kante 4a auf. Die beiden Kanten, die sich von einer Außenseite 4a einer Rippe 4 nach innen erstrecken, sind nach innen sich erweiternd abgeschrägt.In the present case, the rib structure has four ribs 4, which extend in the longitudinal direction parallel to the longitudinal axis L of the shank and protrude equally far in the radial direction. For example only, a thickness of the ribs 4 of the rib structure 3 decreases away from the shaft in the radial direction R at least in sections. The ribs 4 have in cross section the shape of a wedge or rectangle with rounded corners on the radially outer edge 4a. The two edges, which extend inwardly from an outer side 4a of a rib 4, are bevelled inwardly to widen.

Obwohl die Erfindung unter Bezugnahme auf bestimmte Ausführungsbeispiele beschrieben worden ist, ist es für einen Fachmann ersichtlich, dass verschiedene Änderungen ausgeführt werden können und Äquivalente als Ersatz verwendet werden können, ohne den Bereich der Erfindung zu verlassen. Folglich soll die Erfindung nicht auf die offenbarten Ausführungsbeispiele begrenzt sein, sondern soll alle Ausführungsbeispiele umfassen, die in den Bereich der beigefügten Patentansprüche fallen. Insbesondere beansprucht die Erfindung auch Schutz für den Gegenstand und die Merkmale der Unteransprüche unabhängig von den in Bezug genommenen Ansprüchen.Although the invention has been described with reference to particular embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for without departing from the scope of the invention. Accordingly, the invention should not be limited to the disclosed embodiments, but should include all embodiments which fall within the scope of the appended claims. In particular, the invention also claims protection of the subject matter and the features of the subclaims independently of the claims referred to.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Stoßstangebumper
22
Schaftshaft
2a2a
Äußerer Abschnitt des SchaftsOuter section of the shaft
2b2 B
Mittlerer Abschnitt des SchaftsMid section of the shaft
33
Rippenstrukturrib structure
44
Ripperib
55
Kugelpfannenförmiger EndbereichBall socket-shaped end region
66
Kugelförmiger EndbereichSpherical end region
LL
Längsachselongitudinal axis

Claims (11)

Stoßstange (1) für einen Ventiltrieb einer Brennkraftmaschine,
dadurch gekennzeichnet, dass ein Schaft (2) der Stoßstange (1) eine Rippenstruktur (3) aufweist.Bumper (1) for a valve train of an internal combustion engine,
characterized in that a shaft (2) of the bumper (1) has a rib structure (3). Stoßstange (1) nach Anspruch 1, wobei die Rippenstruktur (3) mehrere radial abstehende, sich in Längsrichtung des Schaftes (2) erstreckende Rippen (4) aufweist.Bumper (1) according to claim 1, wherein the rib structure (3) has a plurality of radially extending ribs (4) extending in the longitudinal direction of the shank (2). Stoßstange (1) nach Anspruch 1 oder 2, wobei die Anzahl der Rippen (4) der Rippenstruktur im Bereich von drei bis zwölf liegt, weiter vorzugsweise im Bereich von vier bis acht liegt.A bumper (1) according to claim 1 or 2, wherein the number of ribs (4) of the rib structure is in the range of three to twelve, more preferably in the range of four to eight. Stoßstange (1) nach einem der vorherigen Ansprüche, wobei die Rippenstruktur (3) in einem mittleren Bereich des Schafts (2) angeordnet ist.Bumper (1) according to one of the preceding claims, wherein the rib structure (3) is arranged in a central region of the shaft (2). Stoßstange (1) nach Anspruch 4, wobei die Rippenstruktur (3) lediglich in einem mittleren Bereich (2b) des Schafts (2) angeordnet ist, der höchstens 2/3, weiter vorzugsweise höchstens der Hälfte einer Länge des Schafts entspricht.A bumper (1) according to claim 4, wherein the rib structure (3) is arranged only in a central region (2b) of the shaft (2) which corresponds to at most 2/3, more preferably at most half of a length of the shaft. Stoßstange (1) nach einem der vorherigen Ansprüche, wobei die Rippenstruktur (3) einstückig mit dem Schaft (2) ausgeführt ist.Bumper (1) according to one of the preceding claims, wherein the rib structure (3) is made in one piece with the shaft (2). Stoßstange (1) nach einem der vorherigen Ansprüche, wobei eine Dicke zumindest einer Rippe (4) der Rippenstruktur (3) in radialer Richtung vom Schaft weg zumindest abschnittsweise abnimmt.Bumper (1) according to one of the preceding claims, wherein a thickness of at least one rib (4) of the rib structure (3) decreases in the radial direction away from the shaft at least in sections. Stoßstange (1) nach einem der vorherigen Ansprüche, a) wobei eine Rippe (4) der Rippenstruktur im Querschnitt die Form eines Keils oder Rechtecks, vorzugsweise mit abgerundeten Ecken an der radial außen liegenden Kante (4a) aufweist; und/oder b) wobei eine radial außen liegende Kante (4a) der Rippen der Rippenstruktur im Querschnitt die Form eines Kreisabschnittes mit dem Radius des Schafts im Bereich der Rippenstruktur (3) aufweist. Bumper (1) according to one of the preceding claims, a) wherein a rib (4) of the rib structure in cross-section in the form of a wedge or rectangle, preferably with rounded corners on the radially outer edge (4a); and or b) wherein a radially outer edge (4a) of the ribs of the rib structure in cross section has the shape of a circular portion with the radius of the shaft in the region of the rib structure (3). Ventiltrieb einer Brennkraftmaschine, umfassend eine Stoßstange (1) nach einem der vorhergehenden Ansprüche.Valve gear of an internal combustion engine, comprising a bumper (1) according to one of the preceding claims. Brennkraftmaschine mit einer Stoßstange (1) nach einem der vorhergehenden Ansprüche.Internal combustion engine with a bumper (1) according to one of the preceding claims. Fahrzeug, beispielsweise Kraftfahrzeug, insbesondere Nutzfahrzeug, Wasserfahrzeug, Schienenfahrzeug, mit einer Stoßstange (1) nach einem der vorhergehenden Ansprüche.Vehicle, for example motor vehicle, in particular commercial vehicle, watercraft, rail vehicle, with a bumper (1) according to one of the preceding claims.
EP18166360.0A 2017-04-29 2018-04-09 Pushrod for a valve drive of a combustion engine Active EP3396123B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017004210.1A DE102017004210A1 (en) 2017-04-29 2017-04-29 Bumper for a valve train of an internal combustion engine

Publications (2)

Publication Number Publication Date
EP3396123A1 true EP3396123A1 (en) 2018-10-31
EP3396123B1 EP3396123B1 (en) 2020-06-03

Family

ID=61952588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18166360.0A Active EP3396123B1 (en) 2017-04-29 2018-04-09 Pushrod for a valve drive of a combustion engine

Country Status (5)

Country Link
US (1) US20180328238A1 (en)
EP (1) EP3396123B1 (en)
CN (1) CN108798817A (en)
DE (1) DE102017004210A1 (en)
RU (1) RU2762761C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD902834S1 (en) 2020-01-15 2020-11-24 Brian Kern Motorcycle engine clutch rod

Citations (11)

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JPS56103607U (en) * 1980-01-07 1981-08-13
JPS58146007U (en) * 1982-03-26 1983-10-01 臼井国際産業株式会社 Pushrods for internal combustion engine valves
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US4850315A (en) 1988-05-27 1989-07-25 The Budd Company Push rod
US5027763A (en) 1989-12-05 1991-07-02 Mall Tooling And Engineering One-piece push rod having enlarged spherical seat
US5069173A (en) * 1989-12-05 1991-12-03 Mall Tooling And Engineering Push rod having irregularly shaped internal bore
AT5130U1 (en) 2001-06-21 2002-03-25 Avl List Gmbh PUSH ROD, IN PARTICULAR FOR A VALVE ACTUATING DEVICE OF AN INTERNAL COMBUSTION ENGINE
US20040149244A1 (en) * 2003-01-30 2004-08-05 Diestelmeier Stephen Alan Engine pushrod

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US2749889A (en) * 1950-09-09 1956-06-12 Eaton Mfg Co Valve gear mechanism
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US3997229A (en) * 1975-09-15 1976-12-14 Thomas & Betts Corporation Flexible connecting means
FR2541720B1 (en) * 1983-02-24 1987-05-22 Citroen Sa GLUE SINTERED CAMSHAFT
JPS6245911A (en) * 1985-08-21 1987-02-27 Honda Motor Co Ltd Valve lifter for tappet mechanism of internal combustion engine
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Publication number Priority date Publication date Assignee Title
NL136906C (en) *
DE2136427A1 (en) * 1971-07-21 1973-02-01 Volkswagenwerk Ag TEMPERATURE COMPENSATED PUSH ELEMENT FOR OPERATING A VALVE DISC
US3749068A (en) * 1971-11-01 1973-07-31 Production Tube Co Inc Push rod structure
JPS56103607U (en) * 1980-01-07 1981-08-13
JPS58146007U (en) * 1982-03-26 1983-10-01 臼井国際産業株式会社 Pushrods for internal combustion engine valves
JPS59155516A (en) * 1983-02-25 1984-09-04 Yanmar Diesel Engine Co Ltd Pushrod of internal-combustion engine
US4850315A (en) 1988-05-27 1989-07-25 The Budd Company Push rod
US5027763A (en) 1989-12-05 1991-07-02 Mall Tooling And Engineering One-piece push rod having enlarged spherical seat
US5069173A (en) * 1989-12-05 1991-12-03 Mall Tooling And Engineering Push rod having irregularly shaped internal bore
AT5130U1 (en) 2001-06-21 2002-03-25 Avl List Gmbh PUSH ROD, IN PARTICULAR FOR A VALVE ACTUATING DEVICE OF AN INTERNAL COMBUSTION ENGINE
US20040149244A1 (en) * 2003-01-30 2004-08-05 Diestelmeier Stephen Alan Engine pushrod

Also Published As

Publication number Publication date
DE102017004210A1 (en) 2018-10-31
US20180328238A1 (en) 2018-11-15
RU2762761C2 (en) 2021-12-22
EP3396123B1 (en) 2020-06-03
BR102018008469A2 (en) 2019-03-12
RU2018115223A (en) 2019-10-24
RU2018115223A3 (en) 2021-08-20
BR102018008469A8 (en) 2022-11-29
CN108798817A (en) 2018-11-13

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