EP1979581B1 - Rocker arm consisting of sheet steel - Google Patents

Rocker arm consisting of sheet steel Download PDF

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Publication number
EP1979581B1
EP1979581B1 EP06847037.6A EP06847037A EP1979581B1 EP 1979581 B1 EP1979581 B1 EP 1979581B1 EP 06847037 A EP06847037 A EP 06847037A EP 1979581 B1 EP1979581 B1 EP 1979581B1
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EP
European Patent Office
Prior art keywords
rocker arm
crossbar
side walls
region
head piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP06847037.6A
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German (de)
French (fr)
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EP1979581A1 (en
Inventor
Van Hau Nguyen
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.)
Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication of EP1979581A1 publication Critical patent/EP1979581A1/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
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
    • 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
    • F01L1/18—Rocking arms or levers
    • F01L2001/188—Fulcrums at upper surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20882—Rocker arms

Definitions

  • the invention relates to a rocker arm made of thin-walled steel sheet for pivotally suspended arrangement under a beam-like carrier of a valve train of an internal combustion engine, with inverted U-shaped cross section, wherein at one end of its crossbar at one end a system for a gas exchange valve and at the other end a role as a cam contact surface
  • the invention is applied or relates to a beam-like carrier with a series hanging thereon arranged rocker arm as mentioned above.
  • rocker arm goes out of the EP 1 119 689 B1 , s. for example.
  • Figures 2 - 6 forth.
  • This is also mounted pivotably suspended under a beam-like carrier of a valve train of an internal combustion engine.
  • the aforementioned rocker arm only has insufficient rigidity, especially in the area of its valve stem installation, but also over its entire course.
  • its manufacture and installation proves to be relatively complex, since, for example, a separate, transverse system part is provided for the valve stem at one end. For attachment of the plant part, the side walls must be provided with separate recesses.
  • the object of the invention is therefore to provide a rocker arm or a beam-like support with at least one tilting lever arranged thereon, in which the aforementioned disadvantages are eliminated.
  • the rocker arm or the at least one rocker arm fastened to the support has, at one end, an M-like cross-section, which is preferably (not conditional) generated by an embossing extrusion process.
  • the rocker arm at the other end in the role of fork-shaped open and has a bent toward the bottom course.
  • the rocker arm can be produced in a simple manner, while having an improved stiffness compared with the aforementioned prior art. Just by the embossing extrusion process to create the M-shaped system of the rocker arm in this area has excellent rigidity and can be optionally dimensioned thin-walled.
  • crank at the other end should advantageously be so large that an axial line of the roller is below an imaginary extension of lower sides of the side walls.
  • the crossbar should be formed largely smooth surface closed and thus ends before the cranked section. He can only have at least one recess for fixing a spring clip.
  • the longitudinal channel created by the embossing extrusion process in the top of the crossbar should be narrower than a distance from inside surfaces of the sidewalls below it.
  • This longitudinal channel has expediently straight side walls and a flat base.
  • a particularly stiff valve stem system is created by this process in a simple manner.
  • the embossing / extrusion can be realized in the actual punching-bending operation of the rocker arm, which can be represented for example in several drawing stages on a punch-bending machine.
  • the recess is located above the dome-shaped indentation, over the corresponding outgoing from the carrier head piece, in which case the recess of the spring clip engages in an undercut of the respective head piece.
  • the role is to protrude beyond the other end of the rocker arm and over an upper and lower side of the side walls.
  • the one-end roller can extend over a rolling bearing (preferably needle bearing) or else via a plain bearing on a bolt, which is fastened to the front side in the cranked area in the side walls.
  • a Gleitabgriff for the cam is conceivable and provided in the cranked area.
  • each rocker arm either be part of a pressure piston of a hydraulic lash adjuster or part of a mechanical lash adjuster.
  • the drawing discloses a rocker arm 1 made of thin-walled sheet steel. This is provided for a suspended arrangement under a beam-like carrier 2 of a valve train of an internal combustion engine (see also Figures 5 . 6) , It generally consists of two longitudinally extending side walls 3, which are connected at their upper side 9 by a transverse bar 4.
  • the rocker arm 1 thus forms in cross-section generally an inverted U-shaped profile.
  • a system 7 for a gas exchange valve In the region of one end 6 of the rocker arm 1 has on a bottom 5 of its crossbar 4 a system 7 for a gas exchange valve.
  • the rocker arm 1 in cross-section on an M-like profile (see FIG. 4 ).
  • This is preferably generated by a stamping extrusion process.
  • an embossing stamp of the entire tool engages the top 9 of the crossbar 4 at one end 6 such that this top 9 is partially inserted in the direction of the bottom 5 and that in the top 9 thus a longitudinal channel 10 is formed directly from the one end 6 starts.
  • the aforementioned profile of the system 7 can be generated during the Spanlosfertigung of the rocker arm 1 in large series (punch-bending machine).
  • the area of Appendix 7 has excellent rigidity.
  • the rocker arm 1 is formed widest in its central region.
  • the crossbar 4 has at the top 9 here a dome-shaped indentation 17.
  • the rocker arm 1, as the Figures 5 . 6 reveal, indirectly on a support 2 (see below) are arranged to pivot.
  • the rocker arm 1 has a downwardly bent region 12. This is designed open fork here, so that the crossbar 4 ends approximately in front of the cranked region 12.
  • a bolt 24 is fixed in the side walls 3, on which a roller bearing 23a extends over a roller 13 for a low-friction cam contact. Due to the aforementioned crank the toggle lever 1 also gains in rigidity.
  • FIG. 4 shows, formed by the embossing extrusion process in the top 9 of the crossbar 4 longitudinal channel 10 upright side walls 15 and a flat base 16.
  • the thus penetrated area may have a thickness as the rest of the crossbar, but also be thinner or thicker.
  • recess 20 in the crossbar 4 is a spring clip 19 (see also FIG Fig. 5 . 6 ) with one side attached. Another side of the spring clip 19 is "hooked" over an end face 21 of the crossbar 4 in front of the cranked region 12.
  • the spring clip 19 has a recess 22 above the indentation 17.
  • a simple, articulated and captive pre-assembly of the respective rocker arm 1 relative to the overlying carrier 2 is created.
  • other articulated and captive connections for the rocker arm 1 with the carrier 2 are also conceivable.
  • the head piece 18 is part of a pressure piston 25 of a hydraulic play compensation element 26.
  • a number of pressure piston 25 still extend from the carrier 2 below, to which the corresponding rocker arms 1 are clipped pivotally movable.
  • a supply of hydraulic clearance compensation elements 26 with hydraulic fluid can be realized via a cutting and longitudinal channel 27.
  • a mechanical lash adjuster 28 is provided.
  • the respective head piece 18 is formed bolt-like and integral part of the mechanical lash adjuster 28, which need not be described in detail at this point.
  • Difference of this solution to the after FIG. 5 is also that on a support 2 two rows away from each other, preferably similar toggle lever 1 are arranged.

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

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft einen Kipphebel aus dünnwandigem Stahlblech zur verschwenkbeweglich hängenden Anordnung unter einem balkenartigen Träger eines Ventiltriebs einer Brennkraftmaschine, mit umgekehrt U-förmigem Querschnitt, wobei an einer Unterseite seines Querbalkens an einem Ende eine Anlage für ein Gaswechselventil und am anderen Ende eine Rolle als Nockenanlauffläche appliziert ist bzw. betrifft die Erfindung einen balkenartigen Träger mit einer Reihe hängend daran angeordneter Kipphebel wie vorgenannt.The invention relates to a rocker arm made of thin-walled steel sheet for pivotally suspended arrangement under a beam-like carrier of a valve train of an internal combustion engine, with inverted U-shaped cross section, wherein at one end of its crossbar at one end a system for a gas exchange valve and at the other end a role as a cam contact surface The invention is applied or relates to a beam-like carrier with a series hanging thereon arranged rocker arm as mentioned above.

Hintergrund der ErfindungBackground of the invention

Ein derartiger Kipphebel geht aus der EP 1 119 689 B1 , s. bspw. Figuren 2 - 6, hervor. Dieser ist ebenfalls verschwenkbeweglich hängend unter einem balkenartigen Träger eines Ventiltriebs einer Brennkraftmaschine montiert. Nachteilig ist es bei dem als gattungsbildend betrachteten Stand der Technik, dass der vorgenannte Kipphebel nur eine ungenügende Steifigkeit, gerade im Bereich seiner Ventilschaftanlage, jedoch auch über seinen gesamten Verlauf, hat. Auch erweist sich dessen Herstellung und Montage relativ aufwändig, da beispielsweise ein separates, quer verlaufendes Anlageteil für den Ventilschaft an dem einen Ende vorgesehen ist. Zur Befestigung des Anlageteils müssen die Seitenwände mit separaten Aussparungen versehen werden. Außerdem wird festgestellt, dass sich der Querbalken des vorgenannten Kipphebels auch noch, in Längsrichtung gesehen, hinter den Bereich der Rolle als Nockenarilauffläche erstreckt. Aufgrund des überwiegend "geraden" Verlaufs des Kipphebels muss dieser ggf. relativ stark dimensioniert werden. Die Druckschrift DE10340944 A1 offenbart einen ähnlichen Kipphebel.Such a rocker arm goes out of the EP 1 119 689 B1 , s. for example. Figures 2 - 6 , forth. This is also mounted pivotably suspended under a beam-like carrier of a valve train of an internal combustion engine. It is disadvantageous in the state of the art regarded as generic that the aforementioned rocker arm only has insufficient rigidity, especially in the area of its valve stem installation, but also over its entire course. Also, its manufacture and installation proves to be relatively complex, since, for example, a separate, transverse system part is provided for the valve stem at one end. For attachment of the plant part, the side walls must be provided with separate recesses. In addition, it is found that the crossbar of the aforementioned rocker arm also, seen in the longitudinal direction, behind the area of the role as Nockenarilauffläche extends. Due to the predominantly "straight" course of the rocker arm, this may need to be relatively large dimensions. The publication DE10340944 A1 discloses a similar rocker arm.

Aufgabe der Erfi ndu ngPurpose of the invention

Aufgabe der Erfindung ist es daher, einen Kipphebel bzw. einen balkenartigen Träger mit wenigstens einem daran hängend angeordneten Kipphebel zu schaffen, bei dem die vorgenannten Nachteile beseitigt sind.The object of the invention is therefore to provide a rocker arm or a beam-like support with at least one tilting lever arranged thereon, in which the aforementioned disadvantages are eliminated.

Lösung der AufgabeSolution of the task

Erfindungsgemäß wird diese Aufgabe durch die neuen Merkmale des Anspruchs 1 gelöst. Insbesondere hat der Kipphebel bzw. der wenigstens eine, am Träger befestigte Kipphebel, am einen Ende einen M-ähnlichen Querschnitt, der vorzugsweise (nicht Bedingung) durch einen Präge-Fließpressvorgang generiert ist. Gleichzeitig ist der Kipphebel am anderen Ende bei der Rolle gabelförmig offen und besitzt einen in Richtung zur Unterseite abgekröpften Verlauf.According to the invention this object is achieved by the novel features of claim 1. In particular, the rocker arm or the at least one rocker arm fastened to the support has, at one end, an M-like cross-section, which is preferably (not conditional) generated by an embossing extrusion process. At the same time the rocker arm at the other end in the role of fork-shaped open and has a bent toward the bottom course.

Somit sind die vorgenannten Nachteile beseitigt. Der Kipphebel lässt sich fertigungstechnisch einfach darstellen, wobei er gegenüber dem vorgenannten Stand der Technik eine verbesserte Steifigkeit besitzt. Gerade durch den Präge-Fließpressvorgang zur Schaffung der M-förmigen Anlage hat der Kipphebel in diesem Bereich eine hervorragende Steifigkeit und kann gegebenenfalls dünnwandiger dimensioniert werden.Thus, the aforementioned disadvantages are eliminated. The rocker arm can be produced in a simple manner, while having an improved stiffness compared with the aforementioned prior art. Just by the embossing extrusion process to create the M-shaped system of the rocker arm in this area has excellent rigidity and can be optionally dimensioned thin-walled.

Aber auch aufgrund der gabelartig offenen Abkröpfung am anderen Ende bei der Rolle wird Material gespart. Durch die Kröpfung ist die Steifigkeit zusätzlich erhöht. Auch hat der Kipphebel gegenüber dem eingangs kritisierten Hebel ein verbessertes Massenträgheitsmoment, da vom Schwenkzentrum entfernt weniger Masse akkumuliert ist.But also due to the fork-like open bend at the other end of the roll material is saved. Due to the cranking, the rigidity is additionally increased. Also, the rocker arm compared to the initially criticized lever has an improved moment of inertia, as removed from the pivot center less mass is accumulated.

Weitere zweckmäßige Maßnahmen sind Gegenstand der Unteransprüche, die auch selbständig schutzfähige Maßnahmen, allein oder in Kombination mit weiteren Ansprüchen, aufweisen können.Further expedient measures are the subject of the dependent claims, which may also have independently protectable measures, alone or in combination with other claims.

Nach Anspruch 2 soll die Kröpfung am anderen Ende vorteilhafterweise derartig groß sein, dass eine Axiallinie der Rolle unterhalb einer gedachten Verlängerung von Unterseiten der Seitenwände liegt.According to claim 2, the crank at the other end should advantageously be so large that an axial line of the roller is below an imaginary extension of lower sides of the side walls.

Gemäß einer weiteren zweckmäßigen Gestaltung der Erfindung soll der Querbalken weitestgehend glattflächig geschlossen ausgebildet sein und endet somit vor dem gekröpften Abschnitt. Er kann lediglich wenigstens eine Aussparung zur Befestigung eines Federclips haben. Denkbar sind jedoch auch mehrere längenverteilte Aussparungen im Querbalken bzw. in den Seitenwänden, die zu einer Massereduzierung führen. Gegebenenfalls wird der Fachmann durch geeignete Sickung / Versteifungsrippen etc. für eine ausreichende Steifigkeit des Kipphebels sorgen.According to a further advantageous embodiment of the invention, the crossbar should be formed largely smooth surface closed and thus ends before the cranked section. He can only have at least one recess for fixing a spring clip. However, it is also conceivable to have a plurality of longitudinally distributed recesses in the transverse bar or in the side walls, which lead to a mass reduction. If necessary, the skilled person will provide sufficient rigidity of the rocker arm by suitable beading / stiffening ribs, etc.

Der durch den Präge-Fließpressvorgang in der Oberseite des Querbalkens erzeugte Längskanal soll schmaler sein, als ein Abstand von Innenflächen der Seitenwände darunter. Dieser Längskanal hat zweckmäßigerweise gerade Seitenwände und eine flache Grundfläche. Somit ist durch diesen Vorgang auf einfache Art und Weise eine besonders steife Ventilschaftanlage geschaffen. Das Prägen / Fließpressen kann beim eigentlichen Stanz-Biegevorgang des Kipphebels, der beispielsweise in mehreren Ziehstufen auf einem Stanz-Biegeautomat dargestellt werden kann, realisiert werden.The longitudinal channel created by the embossing extrusion process in the top of the crossbar should be narrower than a distance from inside surfaces of the sidewalls below it. This longitudinal channel has expediently straight side walls and a flat base. Thus, a particularly stiff valve stem system is created by this process in a simple manner. The embossing / extrusion can be realized in the actual punching-bending operation of the rocker arm, which can be represented for example in several drawing stages on a punch-bending machine.

Des Weiteren ist es zur einfachen Lagerung des Kipphebels gegenüber dem balkenartigen Träger vorgeschlagen, in einer Oberseite des Querbalkens eine kalottenförmige Einformung zu applizieren. In diesem Bereich kann dann vorzugsweise auch ein Clip befestigt werden, über den der jeweilige Kipphebel verschwenkbeweglich auf dem vom Träger ausgehenden Kopfstück hängend befestigt werden kann. Somit ist eine einfache Vormontierbarkeit des Trägers mit Kopfstücken und daran befestigten (vorzugsweise) gleichartigen Kipphebeln gegeben. Die gesamte Vorrichtung kann dann komplett vormontiert bereitgehalten und beim Motorenhersteller verbaut werden.Furthermore, it is proposed for easy storage of the rocker arm relative to the beam-like support to apply a dome-shaped indentation in an upper side of the crossbar. In this area, then preferably also a clip can be attached, via which the respective rocker arm can be pivotally mounted on the outgoing from the carrier head piece. Thus, a simple Vormontierbarkeit the carrier provided with head pieces and attached (preferably) similar rocker arms. The entire device can then be kept completely pre-assembled and installed at the engine manufacturer.

Zur Montage ist es notwendig, den jeweiligen Kipphebel mit vormontiertem Federclip, dessen Aussparung über der kalottenförmigen Einformung liegt, über das vom Träger entsprechend ausgehende Kopfstück zu drücken, wobei dann die Ausnehmung des Federclips in einen Hinterschneidung des jeweiligen Kopfstücks greift.For mounting, it is necessary to press the respective rocker arm with preassembled spring clip, the recess is located above the dome-shaped indentation, over the corresponding outgoing from the carrier head piece, in which case the recess of the spring clip engages in an undercut of the respective head piece.

Gemäß einer weiteren zweckmäßigen Konkretisierung der Erfindung soll die Rolle über das andere Ende des Kipphebels sowie über eine Ober- und Unterseite der Seitenwände hinausstehen. Somit wird in diesem Bereich zusätzlich Material gespart.According to a further expedient concretization of the invention, the role is to protrude beyond the other end of the rocker arm and over an upper and lower side of the side walls. Thus, additional material is saved in this area.

Auch kann es vorgesehen sein, den Kipphebel im Bereich seiner Enden schmaler als im Mittenbereich bei der Kalotte auszuführen. Somit benötigt dieser auch in seitliche Richtung relativ wenig Bauraum. Auch ist dem Fachmann klar, dass durch die schmalen Endbereiche des Kipphebels Masse gespart wird und das Massenträgheitsmoment verringerbar ist.It can also be provided to execute the rocker arm in the region of its ends narrower than in the center region in the dome. Thus, this also requires relatively little space in the lateral direction. It is also clear to the person skilled in the art that mass is saved through the narrow end regions of the rocker arm and the mass moment of inertia can be reduced.

Die einenendige Rolle kann über eine Wälzlagerung (vorzugsweise Nadellagerung) oder aber auch über eine Gleitlagerung auf einem Bolzen verlaufen, der stirnseitig in den Seitenwänden im abgekröpften Bereich befestigt ist. Gegebenenfalls ist im abgekröpften Bereich jedoch auch ein Gleitabgriff für den Nocken denkbar und vorgesehen.The one-end roller can extend over a rolling bearing (preferably needle bearing) or else via a plain bearing on a bolt, which is fastened to the front side in the cranked area in the side walls. Optionally, however, a Gleitabgriff for the cam is conceivable and provided in the cranked area.

Gleichermaßen ist ein balkenartiger Träger unter Schutz gestellt, an dem die vorbeschriebenen Kipphebel hängend über ihren Federclip befestigt sind. Dabei kann das Kopfstück für jeden Kipphebel entweder Bestandteil eines Druckkolbens eines hydraulischen Spielausgleichselements oder Bestandteil einer mechanischen Spielausgleichsvorrichtung sein.Similarly, a beam-like support is placed under protection, to which the above-described rocker arms are suspended over their spring clip. In this case, the head piece for each rocker arm either be part of a pressure piston of a hydraulic lash adjuster or part of a mechanical lash adjuster.

Kurze Beschreibung der ZeichnungShort description of the drawing

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

Figur 1
eine räumliche Ansicht auf einen erfindungsgemäßen Kipphebel;
Figur 2
einen Längsschnitt durch den Kipphebel;
Figur 3
eine Draufsicht auf den Kipphebel;
Figur 4
einen Querschnitt durch den Kipphebel im Bereich seiner Anlage;
Figur 5
einen balkenartigen Träger mit daran hängend montiertem einen Kipphebel und hydraulischem Spielausgleichselement und
Figur 6
ein Trägersystem ähnlich dem vorgenannten Aufbau, jedoch mit zwei Reihen anhängender Kipphebel und mechanischer Spielausgleichsvorrichtung.
The invention is suitably explained in more detail with reference to the drawing. Show it:
FIG. 1
a spatial view of a rocker arm according to the invention;
FIG. 2
a longitudinal section through the rocker arm;
FIG. 3
a plan view of the rocker arm;
FIG. 4
a cross section through the rocker arm in the area of his system;
FIG. 5
a beam-like support with a tilting lever mounted thereon and a hydraulic clearance compensation element and
FIG. 6
a carrier system similar to the aforementioned structure, but with two rows of attached rocker arms and mechanical lash adjuster.

Ausführliche Beschreibung der ZeichnungDetailed description of the drawing

Die Zeichnung offenbart einen Kipphebel 1 aus dünnwandigem Stahlblech. Dieser ist für eine hängende Anordnung unter einem balkenartigen Träger 2 eines Ventiltriebs einer Brennkraftmaschine vorgesehen (siehe auch Figuren 5, 6). Er besteht generell aus zwei sich längs erstreckenden Seitenwänden 3, die an ihrer Oberseite 9 durch einen Querbalken 4 verbunden sind. Der Kipphebel 1 bildet somit im Querschnitt generell ein umgekehrt U-förmiges Profil.The drawing discloses a rocker arm 1 made of thin-walled sheet steel. This is provided for a suspended arrangement under a beam-like carrier 2 of a valve train of an internal combustion engine (see also Figures 5 . 6) , It generally consists of two longitudinally extending side walls 3, which are connected at their upper side 9 by a transverse bar 4. The rocker arm 1 thus forms in cross-section generally an inverted U-shaped profile.

Im Bereich eines Endes 6 hat der Kipphebel 1 an einer Unterseite 5 seines Querbalkens 4 eine Anlage 7 für ein Gaswechselventil. In diesem Bereich weist der Kipphebel 1 im Querschnitt ein M-ähnliches Profil auf (siehe Figur 4). Dieses ist vorzugsweise durch einen Präge-Fließpressvorgang erzeugt. Dabei greift u. a. ein Prägestempel des gesamten Werkzeugs auf die Oberseite 9 des Querbalkens 4 an dem einen Ende 6 derartig an, dass diese Oberseite 9 abschnittsweise in Richtung zur Unterseite 5 durchgestellt ist und dass in der Oberseite 9 somit ein Längskanal 10 gebildet ist, der direkt von dem einen Ende 6 ausgeht. Das vorgenannte Profil der Anlage 7 kann während der Spanlosfertigung des Kipphebels 1 in Großserie (Stanz-Biegeautomat) mit generiert werden. Der Bereich der Anlage 7 besitzt eine hervorragende Steifigkeit.In the region of one end 6 of the rocker arm 1 has on a bottom 5 of its crossbar 4 a system 7 for a gas exchange valve. In this area, the rocker arm 1 in cross-section on an M-like profile (see FIG. 4 ). This is preferably generated by a stamping extrusion process. Inter alia, an embossing stamp of the entire tool engages the top 9 of the crossbar 4 at one end 6 such that this top 9 is partially inserted in the direction of the bottom 5 and that in the top 9 thus a longitudinal channel 10 is formed directly from the one end 6 starts. The aforementioned profile of the system 7 can be generated during the Spanlosfertigung of the rocker arm 1 in large series (punch-bending machine). The area of Appendix 7 has excellent rigidity.

Wie des Weiteren offenbart ist (siehe beispielsweise Figur 3), ist der Kipphebel 1 in seinem mittleren Bereich am breitesten ausgebildet. Der Querbalken 4 hat an dessen Oberseite 9 hier eine kalottenförmige Einformung 17. Über diese kann der Kipphebel 1, wie die Figuren 5, 6 offenbaren, mittelbar an einem Träger 2 (s. u.) verschwenkbeweglich angeordnet werden.As further disclosed (see for example FIG. 3 ), the rocker arm 1 is formed widest in its central region. The crossbar 4 has at the top 9 here a dome-shaped indentation 17. About this, the rocker arm 1, as the Figures 5 . 6 reveal, indirectly on a support 2 (see below) are arranged to pivot.

Am anderen Ende 11 weist der Kipphebel 1 einen nach unten abgekröpften Bereich 12 auf. Dieser ist hier gabelförmig offen ausgelegt, so dass der Querbalken 4 in etwa vor dem abgekröpften Bereich 12 endet. In diesem Bereich 12 ist in den Seitenwänden 3 ein Bolzen 24 befestigt, auf dem über eine Wälzlagerung 23a eine Rolle 13 für einen reibungsarmen Nockenkontakt verläuft. Durch die vorgenannte Kröpfung gewinnt der Kipphebel 1 zusätzlich an Steifigkeit.At the other end 11, the rocker arm 1 has a downwardly bent region 12. This is designed open fork here, so that the crossbar 4 ends approximately in front of the cranked region 12. In this area 12, a bolt 24 is fixed in the side walls 3, on which a roller bearing 23a extends over a roller 13 for a low-friction cam contact. Due to the aforementioned crank the toggle lever 1 also gains in rigidity.

Wie Figur 4 näher zeigt, hat der durch den Präge-Fließpressvorgang in der Oberseite 9 des Querbalkens 4 gebildete Längskanal 10 aufrechte Seitenwände 15 und eine flache Grundfläche 16. Der somit durchgestellte Bereich kann eine Dicke wie der restliche Querbalken aufweisen, jedoch auch dünner oder dicker ausgebildet sein.As FIG. 4 shows, formed by the embossing extrusion process in the top 9 of the crossbar 4 longitudinal channel 10 upright side walls 15 and a flat base 16. The thus penetrated area may have a thickness as the rest of the crossbar, but also be thinner or thicker.

In der in Figur 1 gezeigten Aussparung 20 im Querbalken 4 ist ein Federclip 19 (s. a. Fig. 5, 6) mit einer Seite befestigt. Eine andere Seite des Federclips 19 ist über eine Stirnseite 21 des Querbalkens 4 vor dem abgekröpften Bereich 12 "gehakt".In the in FIG. 1 shown recess 20 in the crossbar 4 is a spring clip 19 (see also FIG Fig. 5 . 6 ) with one side attached. Another side of the spring clip 19 is "hooked" over an end face 21 of the crossbar 4 in front of the cranked region 12.

Der Federclip 19 hat eine Ausnehmung 22 oberhalb der Einformung 17. Zur verschwenkbeweglichen Befestigung des Kipphebels 1 an dem entsprechenden Kopfstück 18 des Trägers 2 ist es erforderlich, den Kipphebel 1 mit Federclip 19 so über das Kopfstück 18 zu stecken, dass die Ausnehmung 22 des Federclips 19 in eine Hinterschneidung 23 des jeweiligen Kopfstücks 18 schnappt. Somit ist eine einfache, gelenkige und verliersichere Vormontage des jeweiligen Kipphebels 1 gegenüber dem darüber liegenden Träger 2 geschaffen. Denkbar sind an dieser Stelle jedoch auch noch andere gelenkige und verliersichere Verbindungen für den Kipphebel 1 mit dem Träger 2.The spring clip 19 has a recess 22 above the indentation 17. For pivotally mounting the rocker arm 1 to the corresponding head piece 18 of the carrier 2, it is necessary to put the rocker arm 1 with spring clip 19 over the head piece 18, that the recess 22 of the spring clip 19 snaps into an undercut 23 of the respective head piece 18. Thus, a simple, articulated and captive pre-assembly of the respective rocker arm 1 relative to the overlying carrier 2 is created. However, at this point, other articulated and captive connections for the rocker arm 1 with the carrier 2 are also conceivable.

Nach Figur 5 ist das Kopfstück 18 Bestandteil eines Druckkolbens 25 eines hydraulischen Spielausgleichselements 26. Somit erstrecken sich vom Träger 2 eine Reihe von Druckkolben 25 noch unten, an die verschwenkbeweglich die entsprechenden Kipphebel 1 geclipst sind. Eine Versorgung der hydraulischen Spielausgleichselemente 26 mit Hydraulikmittel kann über einen diese schneidenden und längs verlaufenden Kanal 27 realisiert sein.To FIG. 5 the head piece 18 is part of a pressure piston 25 of a hydraulic play compensation element 26. Thus, a number of pressure piston 25 still extend from the carrier 2 below, to which the corresponding rocker arms 1 are clipped pivotally movable. A supply of hydraulic clearance compensation elements 26 with hydraulic fluid can be realized via a cutting and longitudinal channel 27.

Nach Figur 6 ist eine mechanische Spielausgleichsvorrichtung 28 vorgesehen. Das jeweilige Kopfstück 18 ist bolzenartig ausgebildet und integraler Bestandteil der mechanischen Spielausgleichsvorrichtung 28, die an dieser Stelle nicht näher beschrieben werden muss. Unterschied dieser Lösung zu der nach Figur 5 ist zudem, dass an einem Träger 2 zwei Reihen voneinander weg weisender, vorzugsweise gleichartiger Kipphebel 1 angeordnet sind. Liste der Bezugszahlen 1) Kipphebel 2) Träger 3) Seitenwand 4) Querbalken 5) Unterseite 6) eines Ende 7) Anlage 7a) Gaswechselventil 8) Innenseite 9) Oberseite 10) Längskanal 11) anderes Ende 12) abgekröpfter Bereich 13) Rolle 14) Unterseite 14a) Oberseite 15) Seitenwand 16) Grundfläche 17) Einformung 18) Kopfstück 19) Federclip 20) Aussparung 21) Stirnseite 22) Ausnehmung 23) Hinterschneidung 23a) Wälzlagerung 24) Bolzen 25) Druckkolben 26) hydraulisches Spielausgleichselement 27) Kanal 28) mechanische Spielausgleichsvorrichtung To FIG. 6 a mechanical lash adjuster 28 is provided. The respective head piece 18 is formed bolt-like and integral part of the mechanical lash adjuster 28, which need not be described in detail at this point. Difference of this solution to the after FIG. 5 is also that on a support 2 two rows away from each other, preferably similar toggle lever 1 are arranged. List of reference numbers 1) rocker arm 2) carrier 3) Side wall 4) crossbeam 5) bottom 6) an end 7) investment 7a) Gas exchange valve 8th) inside 9) top 10) longitudinal channel 11) other end 12) cranked area 13) role 14) bottom 14a) top 15) Side wall 16) Floor space 17) indentation 18) headpiece 19) spring clip 20) recess 21) front 22) recess 23) undercut 23a) roller bearing 24) bolt 25) pressure piston 26) hydraulic clearance compensation element 27) channel 28) mechanical lash adjuster

Claims (12)

  1. Rocker arm (1) consisting of thin-walled sheet steel for arrangement in a pivotably suspended manner under a bar-type support (2) of a valve train of an internal combustion engine, with two side walls (3) which, together with a crossbar (4) connecting said side walls, predominantly form an inverted U-shaped profile in cross section, wherein a structure (7) for a gas exchange valve (7a) extends at one end (6) on a lower side (5) of the crossbar (4) with guide sections formed by inner sides (8) of the side walls (3), wherein an upper side (9) of the crossbar (4) is pushed through in the region of the structure (7) by a stamping and extrusion operation in the direction of the lower side (5) in such a manner that an M-like cross section with a longitudinal channel (10) formed on the upper side (9) is present, and wherein the rocker arm (1) merges at the other end (11) thereof which is open in a forked manner into a region (12) which is bent down towards the lower side (5) and to which a roller (13) is applied as a cam thrust surface.
  2. Rocker arm according to Claim 1, wherein the region (12) of the rocker arm (1) is bent at the other end (11) in such a manner than an axial line of the roller (13) lies on or below an imaginary extension of lower sides (14) of the side walls (3).
  3. Rocker arm according to Claim 1, wherein the longitudinal channel (10) at the one end (6) in the upper side (9) of the cross bar (4) has substantially upright side walls (15) and a flat base surface (16).
  4. Rocker arm according to Claim 1, wherein the crossbar (4) is depicted closed in a predominantly smooth-surfaced manner proceeding from the one end (6) as far as the bent-down region (12) at the other end (11).
  5. Rocker arm according to Claim 1, wherein the upper side (9) of the crossbar (4) has, between the ends (6, 11), a dome-shaped formation (17) for arrangement on a head piece (18) emerging from the support (2).
  6. Rocker arm according to Claim 5, wherein the formation (17) is engaged over by a thin-walled spring clip (19) for mounting the rocker arm (1) on the head piece (18) of the support (2), which spring clip (19) is hooked at one end into a cutout (20) in the crossbar (4) and at the other end on an end side (21) of the crossbar (4) on the bent-down region (12) and has a recess (22) with alternative spring tongues engaging, in the mounting situation, in an undercut (23) of the head piece (18).
  7. Rocker arm according to Claim 1, wherein the roller (13) protrudes over the other end (11) and over an upper and lower side (14a, 14) of the side walls (3).
  8. Rocker arm according to Claim 5, wherein the rocker arm (1) is at its greatest width in the region of the dome-shaped formation (17) in the crossbar (4), whereas said rocker arm is depicted to be narrower or tapering in a narrow manner in the section of the ends (6, 11) thereof.
  9. Rocker arm according to Claim 1, wherein the roller (13) is arranged via a rolling or sliding bearing (23a) on a bolt (24) which runs on the end side in the side walls (3) in the bent-down region (12).
  10. Bar-type support with at least one row of rocker arms according to one or more of the preceding claims arranged thereon.
  11. Bar-type support according to Claim 9, if reference is made back to Claim 5 or 6, wherein the head piece (18) for each rocker arm (1) is part of a pressure piston (25) of a hydraulic play-compensating element (26), which respective play-compensating element (26) can be acted upon with hydraulic medium via at least one channel (27) running longitudinally through the support (2).
  12. Bar-type support according to Claim 9, if reference is made back to Claim 5 or 6, wherein the head piece (18) for each rocker arm (1) is part of a mechanical play-compensating device (28).
EP06847037.6A 2006-01-21 2006-12-21 Rocker arm consisting of sheet steel Expired - Fee Related EP1979581B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006002996A DE102006002996A1 (en) 2006-01-21 2006-01-21 Rocker arms made of sheet steel
PCT/EP2006/070092 WO2007082622A1 (en) 2006-01-21 2006-12-21 Rocker arm consisting of sheet steel

Publications (2)

Publication Number Publication Date
EP1979581A1 EP1979581A1 (en) 2008-10-15
EP1979581B1 true EP1979581B1 (en) 2013-07-10

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EP06847037.6A Expired - Fee Related EP1979581B1 (en) 2006-01-21 2006-12-21 Rocker arm consisting of sheet steel

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US (1) US7918200B2 (en)
EP (1) EP1979581B1 (en)
CN (1) CN101360889B (en)
DE (1) DE102006002996A1 (en)
WO (1) WO2007082622A1 (en)

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DE102012204727A1 (en) * 2012-03-23 2013-09-26 Schaeffler Technologies AG & Co. KG cam follower
DE102012210795B3 (en) * 2012-06-26 2013-09-19 Schaeffler Technologies AG & Co. KG Pressure accumulator for e.g. balancing operational pressure fluctuation in line system of internal combustion engine, has locking device that is provided with locking pipe which is connected with piston
DE102012211532A1 (en) * 2012-07-03 2014-01-09 Schaeffler Technologies AG & Co. KG rocker arm
DE102014215701A1 (en) * 2014-08-07 2016-02-11 Schaeffler Technologies AG & Co. KG cam follower
US10202013B2 (en) * 2016-03-01 2019-02-12 Dura Operating, Llc Extruded suspension linkage
CN107514295A (en) * 2017-09-25 2017-12-26 杭州新坐标科技股份有限公司 Novel lightweight rocker stand and its bent bizet position moulding process
DE102018207458A1 (en) * 2018-05-15 2019-11-21 Mahle International Gmbh Bearing arrangement of a cam roller of a valve train

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DE10340944A1 (en) * 2003-09-05 2005-04-28 Ina Schaeffler Kg valve train

Also Published As

Publication number Publication date
CN101360889B (en) 2010-12-08
EP1979581A1 (en) 2008-10-15
US7918200B2 (en) 2011-04-05
WO2007082622A1 (en) 2007-07-26
CN101360889A (en) 2009-02-04
DE102006002996A1 (en) 2007-08-02
US20090007870A1 (en) 2009-01-08

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