EP1554470A1 - Cam follower for a valve gear in an internal combustion engine - Google Patents

Cam follower for a valve gear in an internal combustion engine

Info

Publication number
EP1554470A1
EP1554470A1 EP03769383A EP03769383A EP1554470A1 EP 1554470 A1 EP1554470 A1 EP 1554470A1 EP 03769383 A EP03769383 A EP 03769383A EP 03769383 A EP03769383 A EP 03769383A EP 1554470 A1 EP1554470 A1 EP 1554470A1
Authority
EP
European Patent Office
Prior art keywords
rocker arm
recess
head
arm according
side wall
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
EP03769383A
Other languages
German (de)
French (fr)
Other versions
EP1554470B1 (en
Inventor
Helmut Engelhardt
Johann Kecker
Jörg MICHEL
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.)
IHO Holding GmbH and Co KG
Original Assignee
INA Schaeffler KG
Schaeffler KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by INA Schaeffler KG, Schaeffler KG filed Critical INA Schaeffler KG
Publication of EP1554470A1 publication Critical patent/EP1554470A1/en
Application granted granted Critical
Publication of EP1554470B1 publication Critical patent/EP1554470B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F01L1/185—Overhead end-pivot rocking arms
    • 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
    • F01L2001/187—Clips, e.g. for retaining rocker arm on pivot
    • 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 of a valve train of an internal combustion engine, with two rare walls, which are connected to one another by a crossbar, which crossbar acts on its underside at one end on at least one gas exchange valve and is mounted on a head of a support element at the other end via a dome-like molding , wherein at the other end a clip is applied, by means of which the rocker arm is fixed in position in its pivoting position on the head
  • the object of the invention is therefore to provide a rocker arm of the aforementioned type, in which the disadvantages cited are eliminated
  • this object is achieved in that a central section of the flat material clip rests on the underside of the crossbeam at the other end and has a recess below the indentation, behind the edge of which the head of the support element is held, each side wall being provided with a tab-like extension is encompassed on its outer surface, which extends laterally from the central section and is snapped at its end onto an upper side or a contact surface which is essentially parallel to the upper side in such a way that the end of the extension overlaps at least more than half a width of the upper side or contact surface
  • a type of clip can be used on a wide variety of types of rocker arms or support elements. This lowers the costs.
  • the clip can also be assembled relatively easily by fastening (snapping) the ends of the tab-like lugs onto the clip the top of the side walls ensures an excellent captive fastening of the clip If necessary, the ends can also be clipped into a recess in an outer surface of the corresponding side wall, or the ends (at least one) can also be guided in corresponding recesses or between material elevations on the upper sides of the side walls. This effectively prevents the clip from slipping.
  • the clip can be easily assembled, it is proposed in concrete terms of the invention to provide at least one attachment of the clip with a section which is bent back toward the outer surface of the side wall. Due to this section, the clip can be easily expanded (if necessary manually) and snapped onto the top during assembly.
  • the clip should preferably consist of sheet steel or another resilient material, such as plastic.
  • the rocker arm should preferably have a U-shaped configuration when viewed in cross-sectional direction. Different configurations are also conceivable, including H-shaped or only U-like configurations.
  • rocker arm is generally made of sheet steel, preferably thin-walled.
  • the end in the area of the gas exchange valve is designed to be particularly low-mass in order to minimize the moment of inertia.
  • the recess is circular. So that in this case the head of the support element can be easily mounted behind the recess, the recess should, for example, be slotted or can have tongue-shaped recesses.
  • Figure 1 is a partially sectioned longitudinal view of a rocker arm according to the invention in the installed state and the
  • FIGS. 2 to 5 enlarged sectional views shown across the rocker arm in the region of the indentation for the support element.
  • a rocker arm 1 of a valve train of an internal combustion engine is shown.
  • the rocker arm 1 is preferably made of sheet steel in a forming process.
  • the crossbeam 4 has on its underside 5 at one end 6 a system for at least one gas exchange valve 7. At the other end 8 it has a dome-shaped indentation 9, in which a head 10 of a support element 11 is mounted in the assembled state.
  • the rocker arm 1 is connected to the support element 11 via a bracket 12, which guarantees free movement of the rocker arm 1 in its pivoting direction on the head 10.
  • the clip 12 consists, for example, of thin-walled steel sheet and is applied via a central section 13 to the underside 5 of the crossbar 4 in the region of its other end 8.
  • the central section 13 has a recess 14 which is aligned with the indentation 9.
  • the head 10 of the support element 11 is clipped behind the recess 14, which is oval when viewed in the longitudinal direction of the rocker arm.
  • Each side wall 2, 3 is surrounded on its outer surface 18, 19 by a tab-like extension 16, 17 of the clip 12.
  • These lugs 16, 17 advantageously lie directly on outer surfaces 18, 19 of the side walls 2, 3. Ends 20, 21 of the lugs 16, 17 are snapped onto the upper sides 22, 23 of the side walls 2, 3. In doing so, they overlap at least a large part of a width of the side walls 2, 3.
  • at least one of the lugs 16, 17, starting from its end 20, 21 running on the upper side with one towards the outside bent portion 29 to provide.
  • the clamp 12 can simply be widened and snapped onto the corresponding upper sides 22, 23.
  • Figure 2 discloses the simplest variant of the clip 12 with its symmetrical design
  • FIG. 3 it can also be provided, for example, to provide the side wall 3 on its outer surface 19 with a slot-like recess 25 which extends in the longitudinal direction of the lever.
  • This recess has a contact surface 24 into which the end 21 of the corresponding extension 17 is snapped both side walls 2, 3 are provided with such a design
  • FIG. 4 it is provided that at least on the side of the side wall 2, on the upper side 22, two spaced elevations 26, 27 are applied (see FIG. 1).
  • the end 20 of the extension 16 runs between them. This ensures that the clamp 11 is securely secured against displacement the drag at 1 created
  • the completely preassembled unit can be supplied to the engine manufacturer and installed there without any further assembly work in the internal combustion engine Protection against tilting of the rocker arm 1 on the head 10 of the support element 11 implemented.
  • This connection should preferably be maintained over the entire service life of the internal combustion engine List of reference numbers

Landscapes

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

Abstract

The invention relates to a cam follower (1) for a valve gear in an internal combustion engine, comprising two lateral walls (2, 3), connected to each other by means of a crossbar (4). Said crossbar (4) is mounted on a head (10) of a support element (11) by means of a concave moulding (9) at the end (8) of the underside (5) thereof. A clip (12) is applied to the end (8), by means of which the cam follower (1) is fixed on the head (10) such as to move in the pivoting direction thereof. A central section (13) of the clip (12), made from a flat material, is supported on the underside (5) of the crossbar at the end (8) and has a recess (14) beneath the moulding (9), behind the edge (15) of which the head (10) of the support element (11) is fixed. Each lateral wall (2, 3) is enclosed around the outer surfaces (18, 19) thereof by a tang-like projection (16, 17), extending laterally from the central section (13) and clipped to an upper surface (22, 23) or a support surface (24) essentially parallel to the upper surface at the end (20, 21) thereof, such that the end (20, 21) of the projection (16, 17) grips over at least more than a half of a width of the upper side (22, 23) or support surface (24).

Description

Bezeichnung der Erfindung Name of the invention
Schlepphebel eines Ventiltπebs einer BrennkraftmaschineRocker arm of a valve valve of an internal combustion engine
Beschreibungdescription
Gebiet der ErfindungField of the Invention
Die Erfindung betrifft einen Schlepphebel eines Ventiltriebs einer Brennkraftmaschine, mit zwei Seltenwanden, die durch einen Querbalken miteinander verbunden sind, welcher Querbalken an seiner Unterseite an einem Ende auf wenigstens ein Gaswechselventil einwirkt und am anderen Ende über eine kalottenartige Einformung auf einem Kopf eines Abstutzelements gelagert ist, wobei am anderen Ende eine Klammer appliziert ist, über welche der Schlepphebel in dessen Verschwenkπchtung beweglich am Kopf lagefixiert istThe invention relates to a rocker arm of a valve train of an internal combustion engine, with two rare walls, which are connected to one another by a crossbar, which crossbar acts on its underside at one end on at least one gas exchange valve and is mounted on a head of a support element at the other end via a dome-like molding , wherein at the other end a clip is applied, by means of which the rocker arm is fixed in position in its pivoting position on the head
Hintergrund der ErfindungBackground of the Invention
Ein derartiger Schlepphebel geht aus der als gattungsbildend betrachteten DE 35 00 524 C2 hervor Ein Schenkel der dort offenbarten Klammer verlauft in Erstreckungsπchtung des Schlepphebels Bei einer vom Schlepphebel durchgeführten Schwenkbewegung, generiert durch Nockenbeaufschlagung, behindert diese Klammer eine leichtgangige Schwenkbewegung, da Biegearbeit verrichtet werden muss Dies wirkt sich negativ auf den Gesamtbetrag der Reib- leistung des Ventiltπebs aus Aufgabe der ErfindungSuch a rocker arm emerges from DE 35 00 524 C2, which is considered to be generic, and one leg of the bracket disclosed there extends in the direction of extension of the rocker arm. When the rocker arm performs a pivoting movement, generated by cam action, this bracket hinders a smooth-running pivoting movement, since bending work must be carried out has a negative effect on the total amount of friction of the valve Object of the invention
Aufgabe der Erfindung ist es daher, einen Schlepphebel der vorgenannten Art zu schaffen, bei welchem die zitierten Nachteile beseitigt sindThe object of the invention is therefore to provide a rocker arm of the aforementioned type, in which the disadvantages cited are eliminated
Zusammenfassung der ErfindungSummary of the invention
Erfindungsgemaß wird diese Aufgabe dadurch gelost, dass ein zentraler Abschnitt der aus Flachmateπal bestehenden Klammer an der Unterseite des Querbalkens am anderen Ende anliegt und ein Aussparung unterhalb der Einformung hat, hinter deren Rand der Kopf des Abstutzelements gehalten ist, wobei jede Seitenwand von einem lappenartigen Ansatz an ihrer Außenflache umfaßt ist, der lateral vom zentralen Abschnitt ausgeht und an seinem Ende auf eine Oberseite bzw eine zu der Oberseite im wesentlichen parallele Anlageflache derartig geschnappt ist, daß das Ende des Ansatzes zumindest mehr als eine Hälfte einer Breite der Oberseite bzw Anlageflache übergreiftAccording to the invention, this object is achieved in that a central section of the flat material clip rests on the underside of the crossbeam at the other end and has a recess below the indentation, behind the edge of which the head of the support element is held, each side wall being provided with a tab-like extension is encompassed on its outer surface, which extends laterally from the central section and is snapped at its end onto an upper side or a contact surface which is essentially parallel to the upper side in such a way that the end of the extension overlaps at least more than half a width of the upper side or contact surface
Hierdurch sind die genannten Nachteile mit einfachen Mitteln beseitigt Der Schlepphebel ist trotz seiner Verbindung mit dem Abstutzelement frei in Ver- schwenkπchtung beweglich Gegenüber dem eingangs zitierten Stand der Technik ist die Reibarbeit des Ventiltriebs minimiertIn this way, the disadvantages mentioned are eliminated with simple means. The rocker arm is freely pivotable in spite of its connection to the support element. The friction work of the valve train is minimized compared to the prior art cited at the beginning
Als besonderer Vorteil der Erfindung wird auch angesehen, dass ein Klammertyp an verschiedensten Typen von Schlepphebeln bzw Abstutzelementen Anwendung finden kann Dies senkt die Kosten Auch lasst sich die Klammer relativ einfach montieren Durch eine Befestigung (Schnappen) der Enden der lap- penartigen Ansätze der Klammer auf die Oberseiten der Seitenwande ist eine hervorragend verliersichere Befestigung der Klammer gewahrleistet Gegebenenfalls können die Enden in eine Ausnehmung einer Außenfläche der entsprechenden Seitenwand auch eingeklipst werden bzw. können die Enden (zumindest eines) auch in entsprechenden Ausnehmungen bzw. zwischen Ma- terialerhöhungen der Oberseiten der Seitenwände geführt sein. Somit wird ein Verrutschen der Klammer wirkungsvoll vermieden.It is also regarded as a particular advantage of the invention that a type of clip can be used on a wide variety of types of rocker arms or support elements. This lowers the costs. The clip can also be assembled relatively easily by fastening (snapping) the ends of the tab-like lugs onto the clip the top of the side walls ensures an excellent captive fastening of the clip If necessary, the ends can also be clipped into a recess in an outer surface of the corresponding side wall, or the ends (at least one) can also be guided in corresponding recesses or between material elevations on the upper sides of the side walls. This effectively prevents the clip from slipping.
Damit sich die Klammer einfach montieren lässt, ist in Konkretisierung der Erfindung vorgeschlagen, wenigstens einen Ansatz der Klammer mit einem in Richtung zur Außenfläche der Seitenwand zurückgebogenen Abschnitt zu versehen. Aufgrund dieses Abschnitts lässt sich die Klammer bei deren Montage hervorragend aufweiten (gegebenenfalls manuell) und auf die Oberseite schnappen.So that the clip can be easily assembled, it is proposed in concrete terms of the invention to provide at least one attachment of the clip with a section which is bent back toward the outer surface of the side wall. Due to this section, the clip can be easily expanded (if necessary manually) and snapped onto the top during assembly.
Die Klammer soll in Fortbildung der Erfindung vorzugsweise aus Stahlblech bzw. einem anderen federnden Werkstoff, wie beispielsweise Kunststoff, bestehen.In a further development of the invention, the clip should preferably consist of sheet steel or another resilient material, such as plastic.
Bevorzugt soll der Schlepphebel in Querschnittsrichtung gesehen eine U- förmige Ausbildung besitzen. Denkbar sind auch hiervon abweichende Ausgestaltungen, so auch H-förmige bzw. lediglich U-ähnliche.The rocker arm should preferably have a U-shaped configuration when viewed in cross-sectional direction. Different configurations are also conceivable, including H-shaped or only U-like configurations.
Ein weiterer Beitrag in Richtung Absenkung der Fertigungskosten bzw. Minimierung der oszillierenden Ventiltriebsmassen ist dadurch geleistet, dass der Schlepphebel generell aus Stahlblech, vorzugsweise dünnwandig, gefertigt ist. Besonderes Augenmerk kann hierbei darauf gelegt werden, dass das Ende im Bereich des Gaswechselventils besonders massearm zur Minimierung des Massenträgheitsmoments ausgebildet ist.A further contribution in the direction of lowering the production costs or minimizing the oscillating valve train masses is made by the fact that the rocker arm is generally made of sheet steel, preferably thin-walled. Particular attention can be paid to the fact that the end in the area of the gas exchange valve is designed to be particularly low-mass in order to minimize the moment of inertia.
Weitere Unteransprüche beziehen sich auf zweckmäßige Ausgestaltungen der Aussparung des zentralen Abschnitts an der Unterseite des Querbalkens. Die- se kann beispielsweise oval in Längsrichtung des Nockenfolgers ausgebildet sein, so dass der Kopf des Abstützelements nur durch Seitenflanken der Aussparung umgriffen ist.Further subclaims relate to expedient configurations of the cutout in the central section on the underside of the crossbar. The- For example, it can be oval in the longitudinal direction of the cam follower, so that the head of the support element is encompassed only by side flanks of the recess.
Alternativ zu dem Vorgenannten ist es vorgesehen, die Aussparung kreisförmig auszubilden. Damit sich in diesem Fall der Kopf des Abstützelements leicht hinter die Aussparung montieren lässt, soll die Aussparung beispielsweise geschlitzt sein oder kann zungenförmige Ausnehmungen haben.As an alternative to the above, it is provided that the recess is circular. So that in this case the head of the support element can be easily mounted behind the recess, the recess should, for example, be slotted or can have tongue-shaped recesses.
Kurze Beschreibung der ZeichnungBrief description of the drawing
Die Erfindung ist zweckmäßigerweise anhand der Zeichnung näher erläutert.The invention is expediently explained in more detail with reference to the drawing.
Es zeigen:Show it:
Figur 1 eine teilgeschnittene Längsansicht auf einen erfindungsgemäßen Schlepphebel im eingebauten Zustand und dieFigure 1 is a partially sectioned longitudinal view of a rocker arm according to the invention in the installed state and the
Figuren 2 bis 5 vergrößert dargestellte Schnittansichten quer durch den Schlepphebel im Bereich der Einformung für das Abstützelement.Figures 2 to 5 enlarged sectional views shown across the rocker arm in the region of the indentation for the support element.
Ausführliche Beschreibung der ZeichnungDetailed description of the drawing
Dargestellt ist ein Schlepphebel 1 eines Ventiltriebs einer Brennkraftmaschine.A rocker arm 1 of a valve train of an internal combustion engine is shown.
Dieser hat Seitenwände 2, 3, welche durch einen Querbalken 4 miteinander verbunden sind. Im Querschnitt gesehen hat der Schlepphebel 1 somit ein U- Profil. Vorzugsweise ist der Schlepphebel 1 aus Stahlblech in einem Umformverfahren gefertigt.This has side walls 2, 3, which are interconnected by a crossbar 4. Seen in cross section, the rocker arm 1 thus has a U- Profile. The rocker arm 1 is preferably made of sheet steel in a forming process.
Der Querbalken 4 besitzt an seiner Unterseite 5 an einem Ende 6 eine Anlage für wenigstens ein Gaswechselventil 7. Am anderen Ende 8 weist er eine kalot- tenförmige Einformung 9 auf, in welcher im zusammengebauten Zustand ein Kopf 10 eines Abstützelements 11 gelagert ist. Der Schlepphebel 1 ist mit dem Abstützelement 11 über eine Klammer 12 verbunden, welche eine freie Beweglichkeit des Schlepphebels 1 in dessen Verschwenkrichtung am Kopf 10 garan- tiert.The crossbeam 4 has on its underside 5 at one end 6 a system for at least one gas exchange valve 7. At the other end 8 it has a dome-shaped indentation 9, in which a head 10 of a support element 11 is mounted in the assembled state. The rocker arm 1 is connected to the support element 11 via a bracket 12, which guarantees free movement of the rocker arm 1 in its pivoting direction on the head 10.
Die Klammer 12 besteht beispielsweise aus dünnwandigem Stahlblech und ist über einen zentralen Abschnitt 13 an die Unterseite 5 des Querbalkens 4 im Bereich dessen anderen Endes 8 angelegt. Der zentrale Abschnitt 13 hat eine Aussparung 14, die in Flucht zur Einformung 9 verläuft. Hinter die Aussparung 14, die in Längsrichtung des Schlepphebels gesehen oval ist, wird der Kopf 10 des Abstützelements 11 geklipst.The clip 12 consists, for example, of thin-walled steel sheet and is applied via a central section 13 to the underside 5 of the crossbar 4 in the region of its other end 8. The central section 13 has a recess 14 which is aligned with the indentation 9. The head 10 of the support element 11 is clipped behind the recess 14, which is oval when viewed in the longitudinal direction of the rocker arm.
Jede Seitenwand 2, 3 ist an ihrer Außenfläche 18, 19 von je einem lappenarti- gen Ansatz 16, 17 der Klammer 12 umfasst. Diese Ansätze 16, 17 liegen vorteilhafterweise direkt an Außenflächen 18, 19 der Seitenwände 2, 3 an. Enden 20, 21 der Ansätze 16, 17 sind auf Oberseiten 22, 23 der Seitenwäπde2, 3 geschnappt. Dabei übergreifen sie zumindest einen Großteil einer Breite der Seitenwände 2, 3. Um deren Montage zu erleichtern, ist es vorgesehen, wenigs- tens einen der Ansätze 16, 17, ausgehend von seinem auf der Oberseite verlaufenden Ende 20, 21, mit einem nach außen zurückgebogenen Abschnitt 29 zu versehen. Somit kann, beispielsweise bei manueller Montage, die Klammer 12 einfach aufgeweitet und auf die entsprechenden Oberseiten 22, 23 geschnappt werden. Figur 2 offenbart die einfachste Variante der Klammer 12 mit deren symmetrischer AusbildungEach side wall 2, 3 is surrounded on its outer surface 18, 19 by a tab-like extension 16, 17 of the clip 12. These lugs 16, 17 advantageously lie directly on outer surfaces 18, 19 of the side walls 2, 3. Ends 20, 21 of the lugs 16, 17 are snapped onto the upper sides 22, 23 of the side walls 2, 3. In doing so, they overlap at least a large part of a width of the side walls 2, 3. In order to facilitate their assembly, it is provided that at least one of the lugs 16, 17, starting from its end 20, 21 running on the upper side, with one towards the outside bent portion 29 to provide. Thus, for example in the case of manual assembly, the clamp 12 can simply be widened and snapped onto the corresponding upper sides 22, 23. Figure 2 discloses the simplest variant of the clip 12 with its symmetrical design
Nach Figur 3 kann es auch vorgesehen sein, z B die Seitenwand 3 an deren Außenflache 19 mit einer sich in Hebellangsnchtung erstreckenden, schlitzartigen Ausnehmung 25 zu versehen Diese hat eine Anlageflache 24, in welche das Ende 21 des entsprechenden Ansatzes 17 geschnappt ist Wahlweise können auch beide Seitenwande 2, 3 mit einer derartigen Ausbildung versehenAccording to FIG. 3, it can also be provided, for example, to provide the side wall 3 on its outer surface 19 with a slot-like recess 25 which extends in the longitudinal direction of the lever. This recess has a contact surface 24 into which the end 21 of the corresponding extension 17 is snapped both side walls 2, 3 are provided with such a design
Gemäß Figur 4 ist es vorgesehen, zumindest auf der Seite der Seitenwand 2, auf der Oberseite 22 zwei beabstandete Erhöhungen 26, 27 zu applizieren (s Fig 1) Zwischen diesen verlauft das Ende 20 des Ansatzes 16 Hierdurch ist eine hervorragende Verschiebesicherung der Klammer 11 auf dem Schlepphe- bei 1 geschaffenAccording to FIG. 4, it is provided that at least on the side of the side wall 2, on the upper side 22, two spaced elevations 26, 27 are applied (see FIG. 1). The end 20 of the extension 16 runs between them. This ensures that the clamp 11 is securely secured against displacement the drag at 1 created
Alternativ zu dem Vorgenannten kann es gemäß Figur 5 vorgesehen sein, die Klammer 12 mit einem Endstuck 28 hinter eine Innenflache 29 der Seitenwand 3 zu schnappenAs an alternative to the aforementioned, it can be provided according to FIG. 5 to snap the clip 12 with an end piece 28 behind an inner surface 29 of the side wall 3
Selbstverständlich erschließen sich dem Fachmann an dieser Stelle auch Kombinationen der vorgenannten BefestigungsformenOf course, combinations of the abovementioned types of fastening are also available to the person skilled in the art at this point
Aufgrund der durch die Klammer 12 hergestellten sehr einfachen Verbindung des Schlepphebels 1 mit dem Abstutzelement 11 , welches wahlweise hydraulisch wirkend ausgelegt ist, kann zum einen die komplett vormontierte Einheit zum Motorenhersteller geliefert und dort ohne weiteren Montageaufwand in die Brennkraftmaschine eingebaut werden Zum anderen ist eine hervorragende Sicherung gegen Verkippen des Schlepphebels 1 auf dem Kopf 10 des Ab- stutzelements 11 realisiert Vorzugsweise soll diese Verbindung über die gesamte Lebensdauer der Brennkraftmaschine erhalten bleiben Liste der BezugszahlenDue to the very simple connection of the rocker arm 1 to the support element 11, which is optionally designed to be hydraulic, the completely preassembled unit can be supplied to the engine manufacturer and installed there without any further assembly work in the internal combustion engine Protection against tilting of the rocker arm 1 on the head 10 of the support element 11 implemented. This connection should preferably be maintained over the entire service life of the internal combustion engine List of reference numbers
Schlepphebel Seitenwand Seitenwand Querbalken Unterseite Ende Gaswechselventil Ende Einformung Kopf Abstützelement Klammer Abschnitt Aussparung Rand Ansatz Ansatz Außenfläche Außenfläche Ende Ende Oberseite Oberseite Anlagefläche Ausnehmung Erhöhung Erhöhung Endstück Innenfläche Rocker arm side wall side wall crossbeam bottom end gas exchange valve end molding head support element bracket section recess edge approach shoulder outer surface outer surface end end top upper surface contact surface recess increase increase end piece inner surface

Claims

Patentansprüche claims
1. Schlepphebel (1) eines Ventiltriebs einer Brennkraftmaschine, mit zwei Seitenwänden (2, 3), die durch einen Querbalken (4) miteinander verbunden sind, welcher Querbalken (4) an seiner Unterseite (5) an einem Ende (6) auf wenigstens ein Gaswechselventil (7) einwirkt und am anderen Ende (8) über eine kalottenartige Einformung (9) auf einem Kopf (10) eines Abstützelements (11 ) gelagert ist, wobei am anderen Ende (8) eine Klammer (12) appliziert ist, über welche der Schlepphebel (1) in dessen Verschwenkrich- tung beweglich am Kopf (10) lagefixiert ist, dadurch gekennzeichnet, daß ein zentraler Abschnitt (13) der aus Flachmaterial bestehenden Klammer (12) an der Unterseite (5) des Querbalkens (4) am anderen Ende (8) anliegt und ein Aussparung (14) unterhalb der Einformung (9) hat, hinter deren Rand (15) der Kopf (10) des Abstützelements (11 ) gehalten ist, wobei jede Seitenwand (2, 3) von einem lappenartigen Ansatz (16, 17) an ihrer Außenfläche (18, 19) umfaßt ist, der lateral vom zentralen Abschnitt (13) ausgeht und an seinem Ende (20, 21 ) auf eine Oberseite (22, 23) bzw. eine zu der Oberseite im wesentlichen parallele Anlagefläche (24) derartig geschnappt ist, daß das Ende (20, 21 ) des Ansatzes (16, 17) zumindest mehr als eine Hälfte einer Breite der Oberseite (22, 23) bzw. Anlagefläche (24) übergreift.1. rocker arm (1) of a valve train of an internal combustion engine, with two side walls (2, 3), which are connected by a crossbar (4), which crossbar (4) on its underside (5) at one end (6) on at least a gas exchange valve (7) acts and is mounted at the other end (8) via a dome-shaped indentation (9) on a head (10) of a support element (11), a clip (12) being applied at the other end (8) which the rocker arm (1) is fixed in position in its pivoting direction on the head (10), characterized in that a central section (13) of the clip (12) made of flat material on the underside (5) of the crossbeam (4) on the other end (8) and has a recess (14) below the indentation (9), behind the edge (15) of which the head (10) of the support element (11) is held, each side wall (2, 3) being lobed Approach (16, 17) on its outer surface (18, 19) is covered, the lateral starts from the central section (13) and is snapped at its end (20, 21) onto an upper side (22, 23) or an essentially parallel contact surface (24) such that the end (20, 21) of the Approach (16, 17) overlaps at least more than one half of a width of the top (22, 23) or contact surface (24).
2. Schlepphebel nach Anspruch 1 , dadurch gekennzeichnet, daß wenigstens eine Seitenwand (2, 3) an deren Außenfläche (18, 19) eine sich in Hebel- längsrichtung erstreckende, schlitzartige Ausnehmung (25) zur Bildung der2. rocker arm according to claim 1, characterized in that at least one side wall (2, 3) on the outer surface (18, 19) extending in the longitudinal direction of the lever, slot-like recess (25) to form the
Anlagefläche (24) hat, in welche das Ende (20, 21 ) des korrespondierendenHas contact surface (24) in which the end (20, 21) of the corresponding
Ansatzes (16, 17) der Klammer (12) geschnappt ist (Fig. 2).Approach (16, 17) of the bracket (12) is snapped (Fig. 2).
3. Schlepphebel nach Anspruch 1 , dadurch gekennzeichnet, daß wenigstens eine Seitenwand (2, 3) an ihrer Oberseite (22, 23) eine Erhebung aufweist, welche von dem Ende (20, 21 ) des jeweiligen Ansatzes (16, 17) der Klammer (12), in Hebellängsrichtung gesehen, ein- oder beidseitig umschlossen ist.3. rocker arm according to claim 1, characterized in that at least one side wall (2, 3) on its upper side (22, 23) has an elevation, which is enclosed on one or both sides by the end (20, 21) of the respective extension (16, 17) of the clamp (12), seen in the longitudinal direction of the lever.
4. Schlepphebel nach Anspruch 1 , dadurch gekennzeichnet, daß wenigstens eine Seitenwand (2, 3) an ihrer Oberseite (22, 23) eine Vertiefung oder zwei4. rocker arm according to claim 1, characterized in that at least one side wall (2, 3) on its upper side (22, 23) a recess or two
Erhöhungen (26, 27) aufweist, in welcher oder zwischen welchen ein EndeHas elevations (26, 27), in which or between which an end
(20, 21 ) des jeweiligen Ansatzes (16, 17) der Klammer (12) geführt ist (Fig. 1 , 4).(20, 21) of the respective approach (16, 17) of the bracket (12) is guided (Fig. 1, 4).
5. Schlepphebel nach Anspruch 1 , dadurch gekennzeichnet, daß wenigstens ein Ansatz (16, 17) der Klammer (12) mit seinem Ende (20, 21 ), die Ober- seite (22, 23) der entsprechenden Seitenwand (2, 3) komplett übergreifend, mit einem Endstück (28) hinter eine Innenfläche (29) der Seitenwand (2, 3) geschnappt ist (Fig. 5).5. rocker arm according to claim 1, characterized in that at least one approach (16, 17) of the bracket (12) with its end (20, 21), the top (22, 23) of the corresponding side wall (2, 3) completely overlapping, with one end piece (28) being snapped behind an inner surface (29) of the side wall (2, 3) (FIG. 5).
6. Schlepphebel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens ein Ansatz (16, 17) der Klammer (12), ausgehend von seinem auf der Oberseite (22, 23) respektive der Anlagefläche (24) verlaufenden Ende (20, 21 ), einen in Richtung zur Außenfläche (18, 19) der Seitenwand (2, 3) zurückgebogenen Abschnitt (29) aufweist, wel- eher beabstandet zu dem auf der Oberseite (22, 23) respektive der Anlagefläche (24) verlaufenden Ende (20, 21 ) ist.6. rocker arm according to one of the preceding claims, characterized in that at least one extension (16, 17) of the clip (12), starting from its on the top (22, 23) and the contact surface (24) extending end (20, 21st ), has a section (29) which is bent back in the direction of the outer surface (18, 19) of the side wall (2, 3) and which is spaced apart from the end (20) running on the upper side (22, 23) or the contact surface (24) , 21) is.
7. Schlepphebel nach einem der vorhergehenden Ansprüche, dadurch ge- kennzeichnet, daß die Klammer (12) aus einem federnden Werkstoff wie Stahlblech oder aus Kunststoff oder aus faser- bzw. partikelverstärktem Kunststoff besteht.7. rocker arm according to one of the preceding claims, character- ized in that the bracket (12) made of a resilient material such Sheet steel or plastic or fiber or particle reinforced plastic.
8. Schlepphebel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Schlepphebel (1) einen generell U-förmigen Querschnitt besitzt und aus Blechwerkstoff hergestellt ist.8. rocker arm according to one of the preceding claims, characterized in that the rocker arm (1) has a generally U-shaped cross section and is made of sheet metal.
9. Schlepphebel nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Aussparung (14) des zentralen Abschnitts (13) an der Unterseite (5) des Querbalkens (4), in Hebellängsrichtung gesehen, o- val ist, wobei der Kopf (10) des Abstützelements (11 ) hinter den Rand (15) der Aussparung (14) geklipst oder geschnappt ist.9. rocker arm according to one of the preceding claims, characterized in that the recess (14) of the central portion (13) on the underside (5) of the crossbar (4), seen in the longitudinal direction of the lever, is oval, the head (10 ) of the support element (11) is clipped or snapped behind the edge (15) of the recess (14).
10. Schlepphebel nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Aussparung (14) des zentralen Abschnitts (13) an der Unterseite (5) des Querbalkens (4) kreisförmig geschlitzt ist oder kreisförmig mit federzungenartigen Ausnehmungen versehen ist, wobei der Kopf (10) des10. rocker arm according to one of claims 1 to 8, characterized in that the recess (14) of the central portion (13) on the underside (5) of the crossbar (4) is circularly slotted or circularly provided with spring-tongue-like recesses, the Head (10) of the
Abstützelements (11) hinter den Rand (15) der Aussparung (14) geklipst oder geschnappt ist. Support element (11) is clipped or snapped behind the edge (15) of the recess (14).
EP03769383A 2002-10-24 2003-10-14 Cam follower for a valve gear in an internal combustion engine Expired - Lifetime EP1554470B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10249560A DE10249560A1 (en) 2002-10-24 2002-10-24 Rocker arm of a valve train of an internal combustion engine
DE10249560 2002-10-24
PCT/EP2003/011343 WO2004038185A1 (en) 2002-10-24 2003-10-14 Cam follower for a valve gear in an internal combustion engine

Publications (2)

Publication Number Publication Date
EP1554470A1 true EP1554470A1 (en) 2005-07-20
EP1554470B1 EP1554470B1 (en) 2008-03-26

Family

ID=32087160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03769383A Expired - Lifetime EP1554470B1 (en) 2002-10-24 2003-10-14 Cam follower for a valve gear in an internal combustion engine

Country Status (5)

Country Link
US (1) US7350489B2 (en)
EP (1) EP1554470B1 (en)
AU (1) AU2003278077A1 (en)
DE (2) DE10249560A1 (en)
WO (1) WO2004038185A1 (en)

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DE102004041231A1 (en) 2004-08-26 2006-03-30 Ina-Schaeffler Kg Connecting element for the captive mounting of a lever-like cam follower
DE102005036918A1 (en) 2005-08-05 2007-02-08 Schaeffler Kg Connecting element for the captive mounting of a lever-like cam follower
DE102006048342A1 (en) * 2006-10-12 2008-04-17 Schaeffler Kg cam follower
JP5164545B2 (en) * 2007-12-07 2013-03-21 株式会社オティックス Valve operating device and rocker arm unit
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Also Published As

Publication number Publication date
US7350489B2 (en) 2008-04-01
EP1554470B1 (en) 2008-03-26
DE50309489D1 (en) 2008-05-08
DE10249560A1 (en) 2004-05-06
AU2003278077A1 (en) 2004-05-13
WO2004038185A1 (en) 2004-05-06
US20080041326A1 (en) 2008-02-21

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