EP2156021A1 - Rocker arm of an internal combustion engine - Google Patents

Rocker arm of an internal combustion engine

Info

Publication number
EP2156021A1
EP2156021A1 EP08736306A EP08736306A EP2156021A1 EP 2156021 A1 EP2156021 A1 EP 2156021A1 EP 08736306 A EP08736306 A EP 08736306A EP 08736306 A EP08736306 A EP 08736306A EP 2156021 A1 EP2156021 A1 EP 2156021A1
Authority
EP
European Patent Office
Prior art keywords
rocker arm
spacer
valve
nut
shaped profile
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
EP08736306A
Other languages
German (de)
French (fr)
Other versions
EP2156021B1 (en
Inventor
Volker Schmidt
Wolfgang Christgen
Arndt Ihlemann
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
Original Assignee
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 Schaeffler KG filed Critical Schaeffler KG
Priority to PL08736306T priority Critical patent/PL2156021T3/en
Publication of EP2156021A1 publication Critical patent/EP2156021A1/en
Application granted granted Critical
Publication of EP2156021B1 publication Critical patent/EP2156021B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F01L1/20—Adjusting or compensating clearance

Definitions

  • the invention relates to a rocker arm of an internal combustion engine, wherein the rocker arm is actuated with a cam and at a first, valve-side end of the rocker arm is provided with an internally threaded recess into which an adjusting screw is screwed, wherein the first, valve-side end of the rocker arm a Has U-shaped profile and the screw is fixed with a nut in the recess.
  • Rocker arms also known as toggle levers or valve rocker arms, are used to selectively open and close valves on internal combustion engines, such as, for example, a gasoline engine of a motor vehicle.
  • a cam of a camshaft acts on a cam-side end of the rocker arm such that it moves at desired times in the operation of the internal combustion engine, for example, the inflow of an air-fuel mixture into a cylinder chamber or the outflow of combustion gases from the cylinder chamber enable.
  • rocker arms which are produced in a casting process. Especially for weight savings, to reduce the moving masses at high speeds of the internal combustion engine, such a rocker arm can also be punched out of a metal sheet and formed in the desired manner.
  • the rocker arm has a valve-side first end with a recess, in the internal thread of an adjusting screw is screwed, for example, one end of the screw can be formed substantially hemispherical in order to interact with a correspondingly shaped counter surface as possible on the valve to be controlled to be able to.
  • the US 3,096,749 describes a rocker arm, which is composed of two U-shaped and welded together sheets.
  • a receiving cylinder with an internal thread for receiving an adjusting screw is arranged or formed at a first, valve side end of the rocker arm, which passes through the two U-shaped plates of the rocker arm.
  • This receiving cylinder and thus the male screw is disposed between two side cheeks of the first, valve-side end of the rocker arm.
  • This rocker arm has a comparatively complicated structure, since it is composed of two sheet metal blanks and said receiving cylinder.
  • the first valve-side end of the rocker arm is provided with a fastening opening for an adjusting screw, this first end region of the rocker arm, as can be seen from FIG. 3, being formed by folding over side cheeks of a U-shaped profile. so as to likewise obtain a material thickening at the location of the attachment opening.
  • DE 103 38 837 A1 discloses a valve rocker arm in which a valve-side adjusting screw is arranged between two side cheeks of a U-shaped first end of the rocker arm.
  • a fixing of the adjusting screw in an internally threaded mounting hole is made by a lock with two nuts or with a collar nut or with a nut with washer.
  • the nuts are arranged on the side cheeks opposite side of the rocker arm and therefore difficult to access in the installed state of the internal combustion engine.
  • a disadvantage of known rocker arms is that a fixing or locking of the valve-side adjusting screw with at least one nut, which is arranged between the side cheeks of a U-shaped profile of a first end of the rocker arm is very difficult to impossible, since the tightening or loosening of these nuts, for example, with a ring spanner or socket wrench, through the side walls and the cramped installation dimensions of the rocker arm is practically impossible.
  • the invention has for its object to provide a rocker arm for an internal combustion engine, arranged between the side cheeks adjusting screw can be fixed in a simple manner by means of a nut.
  • the invention is based on the finding that for fixing a set screw of a rocker arm at least one nut must be screwed and tightened on a corresponding external thread of the screw. If the nut is to be screwed onto the adjusting screw at the side on which side cheeks of a U-shaped profile of a valve-side first end of the rocker arm are formed, it is necessary to remove the fixing nut from the bottom of the U-shaped profile, for example a punching and bending process is made to space. For this purpose, an additional spacer is provided, which engages around the shank of the adjusting screw and is arranged between the at least one nut and the base of the U-shaped profile.
  • the invention according to the features of the main claim relates to a rocker arm of an internal combustion engine, wherein the rocker arm is actuated with a cam and at a first, valve-side end of the rocker arm is provided with an internally threaded recess into which an adjusting screw is screwed, wherein the first , Valve side end of the rocker arm has a U-shaped profile and the screw is fixed with a nut in the recess.
  • this rocker arm is provided that within a U-shaped profile of the first end of the rocker arm a spacer is disposed between a bottom of the U-shaped profile and the nut.
  • the advantage of the rocker arm according to the invention is that an additional spacing of the nut from the bottom of the profile of the rocker arm is achieved by the additional spacer between that sheet metal portion of the rocker arm, which forms the profile base, and the screwed onto the screw nut.
  • the length of the adjusting screw and / or the height of the spacer is preferably selected such that the screwed onto the screw nut, for example, can be acted upon with a ring spanner, without preventing the side cheeks this action.
  • a spacer can be designed so lightweight that the entire moving mass of the rocker arm is only slightly increased. It is understood in the knowledge of the invention of itself that several nuts can be countered with respect to the screw or that a mother can be screwed with a device for self-assurance.
  • the height of the spacer is at least as high or preferably even higher than the height of the side walls, measured from the bottom of the U-shaped profile to position the nut above the side cheeks, so that an actuation the same is always possible without restriction.
  • the spacer is formed directly and thus integrally with the nut and has a round or polygonal outer geometry. Accordingly, a screw which has been extended axially so far is used that its screw head extends beyond the height of the side cheeks of the rocker arm. protrudes.
  • An additional separate spacer is designed, for example, as a ring or as a block-shaped disk with a central recess and consists of a suitable material, for example a hard plastic or a metal. It may be formed as a separate component, which only at the
  • rocker arm on the adjusting screw and fix it together with the nut. It is also possible that the spacer is firmly connected to the rocker arm. A separate metal spacer is fixed to the rocker arm, for example by means of spot welding or gluing, to avoid losing it.
  • the side cheeks can be deformed or embossed such that a spacer made of metal or plastic is fixed at the location of the recess for the set screw.
  • Such an additional embossing process can be advantageously carried out in the manufacture of the rocker arm.
  • the additional spacer is integrally formed together with the first, valve-side end of the rocker arm. This can be done, for example, that the reason of the profile is performed at this end of the rocker arm with a larger frontal length than needed for the toggle lever itself. This pointing away in the longitudinal direction of the rocker arm of the axis of rotation of the rocker arm section can subsequently be folded over in a processing step substantially back on itself, so that this refolding comes to rest within the side cheeks on itself or on the actual first end of the rocker arm.
  • the base of the U-shaped profile is cut out in the shape of a U-shape in the region of the recess, and subsequent refolding of this U-shaped section takes place in the direction of the end-side and valve-near end of the rocker arm. Finally, a perforation is made in this folded-over U-shaped section.
  • an additional spacing of the nut from the actual bottom of the U-shaped profile is achieved and the punched-out in the bottom of the profile between the two side cheeks of the rocker arm sheet metal is obtained without additional material sections, so that the total weight of the rocker arm practically not increased is.
  • the folded-over section or the folded-over U-shaped section is fixed in a form-fitting and / or material-locking manner to the bottom of the first end of the rocker arm.
  • a cohesive fixation of the refolding can be realized for example by spot welding.
  • FIG. 3 shows a rocker arm with a separate spacer and molded onto the spacer for fixing its side cheeks in a plan view
  • Fig. 4 is a rocker arm with an integrated spacer, made by a sheet metal refolding, and
  • FIG 5 shows a further rocker arm with an integrated spacer, produced by a separate punching and a sheet metal
  • a rocker arm 1 is shown in a perspective view, which can be actuated at its second end remote from the valve by means of a not shown here for simplicity of illustration and arranged on a camshaft of an internal combustion engine cam in a conventional manner.
  • valve-side end 2 of the rocker arm 1 a recognizable in Fig. 3 recess 3 is formed, which usually has an internal thread.
  • a set screw 4 is screwed, which has one end key surfaces in the form of a square 5 for an operating tool. With its other end, the adjusting screw 4 directly or via another actuator with a Valve be brought into contact.
  • a nut For fixation or locking of the adjusting screw 4 on the rocker arm 1 in a desired position depth is used in a conventional manner a nut. 6
  • the first, valve-side end 2 of the rocker arm 1 has a substantially U-shaped profile with two side cheeks 7 and 8 and a bottom 9 of the profile connecting the two side cheeks.
  • the entire rocker arm 1 has been punched out during its production from a sheet metal blank, perforated in the desired manner and reshaped.
  • a spacer 10 is additionally provided which is arranged between the nut 6 and the base 9 of the U-shaped profile and the shaft of the adjusting screw 4 coaxially surrounds.
  • the spacer 10 is formed as a separate ring, for example of a hard plastic or a metal.
  • the spacer 10 may be spot welded or glued to the base 9 of the rocker arm 1 to prevent it from being lost.
  • the spacer 10 may be formed as a substantially rectangular or square disc 12 or block with a central recess for the adjusting screw 4.
  • Such an embodiment of the spacer 10 favors in a mounting the coaxial alignment of the recess thereof and the recess 3 in the bottom 9 of the rocker arm first
  • the height of the same, seen in the axial direction of the adjusting screw 4 chosen such that it at least largely corresponds to the height of the side cheeks 7, 8 or even exceeds the side cheek height.
  • An alternative mounting option for the spacer 10, here in the form of a ring, is an embossing or deformation of the side cheeks 7 and 8, to clamp the spacer 10 between the side cheeks 7, 8, as shown in Fig. 3.
  • Fig. 4 Another possibility for the design of the spacer is shown in Fig. 4.
  • the base 9 of the U-shaped profile of the first end 2 of the rocker arm 1 is executed extended end face and folded back by 180 ° on itself. This can be done by means of processing machines known per se, with the person skilled in the art selecting the material thickness or the materials suitable for this purpose. It is understood that the folded-over portion 11 also has a recess 3 for passing or screwing in the adjusting screw 4.
  • FIG. 5 a further embodiment is shown in Fig. 5, in which the bottom 9 of the first end 2 of the rocker arm 1 is punched out in front of the front end and in front of the rocker arm-side recess 3 is substantially U-shaped. Subsequently, this U-shaped section 12 is also folded over by 180 ° on itself or on the bottom 9 to the front end 2 out and introduced the recess 3 in this double layer of material in order to screw the screw 4 can. As also shown in FIG. 5, on the base 9 of the rocker arm 1, a guide section 13 pointing in the direction of the valve is formed, which serves to increase the screw-in length of the adjusting screw 4. In both of the above embodiments according to FIGS.
  • the folded-over sections 11, 12 can still be fixed in the folded-over position by means of spot welding.
  • the height of the spacer thus formed is usually less than the height of the side cheeks 7, 8.

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

Abstract

The invention relates to a rocker arm (1) of an internal combustion engine, wherein the rocker arm (1) can be actuated with a cam and a recess (3) provided with an inside thread is formed on a first valve-side end (2) of the rocker arm (1), an adjusting screw (4) being screwed into said recess, wherein the first valve-side end (2) of the rocker arm (1) has a U-shaped profile and the adjusting screw (4) is fixed in the recess (3) with a nut (6). In order to facilitate an actuation of the nut (6), it is provided that a space (10) is disposed inside a U-shaped profile of the first valve-side end (2) of the rocker arm (1) between a base (9) of the U-shaped profile and the nut (6).

Description

Bezeichnung der Erfindung Name of the invention
Kipphebel einer BrennkraftmaschineRocker arm of an internal combustion engine
Gebiet der ErfindungField of the invention
Die Erfindung betrifft einen Kipphebel einer Brennkraftmaschine, wobei der Kipphebel mit einer Nocke betätigbar ist und an einem ersten, ventilseitigen Ende des Kipphebels eine mit einem Innengewinde versehene Ausnehmung ausgebildet ist, in die eine Stellschraube eingeschraubt ist, wobei das erste, ventilseitige Ende des Kipphebels ein U-förmiges Profil aufweist und die Stellschraube mit einer Mutter in der Ausnehmung fixiert ist.The invention relates to a rocker arm of an internal combustion engine, wherein the rocker arm is actuated with a cam and at a first, valve-side end of the rocker arm is provided with an internally threaded recess into which an adjusting screw is screwed, wherein the first, valve-side end of the rocker arm a Has U-shaped profile and the screw is fixed with a nut in the recess.
Hintergrund der ErfindungBackground of the invention
Kipphebel, auch Kniehebel oder Ventil-Kipphebel genannt, werden dazu eingesetzt, um an Brennkraftmaschinen, wie beispielsweise einem Ottomotor eines Kraftfahrzeugs, Ventile gezielt zu öffnen und zu schließen. Hierzu wirkt eine Nocke einer Nockenwelle derart auf ein nockenseitiges Ende des Kipphebels ein, dass sich dieser zu gewünschten Zeitpunkten im Betrieb der Brennkraftmaschine bewegt, um beispielsweise das Einströmen eines Luft-Kraftstoff- Gemisches in einen Zylinderraum bzw. das Ausströmen der Verbrennungsgase aus dem Zylinderraum zu ermöglichen. Bekannt sind Kipphebel, die in einem Gussverfahren hergestellt werden. Besonders zur Gewichtsersparnis, um die bewegten Massen bei hohen Drehzahlen der Brennkraftmaschine zu reduzieren, kann ein derartiger Kipphebel auch aus einem Metallblech ausgestanzt und in gewünschter Weise umgeformt werden. Der Kipphebel verfügt über ein ventilseitiges erstes Ende mit einer Ausneh- mung, in deren Innengewinde eine Stellschraube eingeschraubt ist, wobei z.B. ein Ende der Stellschraube im Wesentlichen halbkugelförmig ausgebildet sein kann, um mit einer entsprechend ausgebildeten Gegenfläche am zu steuern- den Ventil möglichst reibungsfrei zusammenwirken zu können.Rocker arms, also known as toggle levers or valve rocker arms, are used to selectively open and close valves on internal combustion engines, such as, for example, a gasoline engine of a motor vehicle. For this purpose, a cam of a camshaft acts on a cam-side end of the rocker arm such that it moves at desired times in the operation of the internal combustion engine, for example, the inflow of an air-fuel mixture into a cylinder chamber or the outflow of combustion gases from the cylinder chamber enable. Are known rocker arms, which are produced in a casting process. Especially for weight savings, to reduce the moving masses at high speeds of the internal combustion engine, such a rocker arm can also be punched out of a metal sheet and formed in the desired manner. The rocker arm has a valve-side first end with a recess, in the internal thread of an adjusting screw is screwed, for example, one end of the screw can be formed substantially hemispherical in order to interact with a correspondingly shaped counter surface as possible on the valve to be controlled to be able to.
Um die Stellschraube in einer gewünschten axialen Position zu halten und ein Verdrehen der Stellschraube relativ zum Kipphebel bzw. zu dem durch das ausgestanzte und umgeformte Blech gebildete U-förmigen Profil zu vermeiden ist es bekannt, mindestens eine Mutter vorzusehen, die auf ein entsprechend ausgebildetes Außengewinde an der Stellschraube aufgeschraubt und derart fest angezogen ist, dass die Mutter am Material des ersten Endes des Kipphebelkörpers unmittelbar anliegt und die Stellschraube fixiert bzw. kontert.In order to keep the screw in a desired axial position and to prevent rotation of the adjusting screw relative to the rocker arm or to the formed by the punched and formed sheet metal U-shaped profile, it is known to provide at least one nut on a correspondingly formed external thread screwed onto the screw and tightened so tightly that the nut on the material of the first end of the rocker arm body rests directly and fixes the set screw or counter.
Die US 3,096,749 beschreibt einen Kipphebel, der aus zwei U-förmigen und miteinander verschweißten Blechen aufgebaut ist. An einem ersten, ventilseiti- gen Ende des Kipphebels ist ein Aufnahmezylinder mit einem Innengewinde zur Aufnahme einer Stellschraube angeordnet oder ausgebildet, der die beiden U-förmigen Bleche des Kipphebels durchsetzt. Dieser Aufnahmezylinder und somit die aufzunehmende Stellschraube ist zwischen zwei Seitenwangen des ersten, ventilseitigen Endes des Kipphebels angeordnet. Dieser Kipphebel hat einen vergleichsweise komplizierten Aufbau, da er aus zwei Blechzuschnitten und dem genannten Aufnahmezylinder zusammengesetzt ist.The US 3,096,749 describes a rocker arm, which is composed of two U-shaped and welded together sheets. A receiving cylinder with an internal thread for receiving an adjusting screw is arranged or formed at a first, valve side end of the rocker arm, which passes through the two U-shaped plates of the rocker arm. This receiving cylinder and thus the male screw is disposed between two side cheeks of the first, valve-side end of the rocker arm. This rocker arm has a comparatively complicated structure, since it is composed of two sheet metal blanks and said receiving cylinder.
Bei dem Kipphebel der JP 2001 13241 A ist das erste, ventilseitige Ende des Kipphebels durch ein Umbiegen des Kipphebelblechs um 180° auf sich selbst zurückgefaltet, so dass in diesem Bereich eine Materialverdickung ausgebildet ist. In ein mit einem Innengewinde versehenen Schraubloch dieser Material Verdickung ist eine mit dem zu betätigenden Ventil in Kontakt kommende Stellschraube einschraubbar, wobei aufgrund der genannten Materialverdickung eine höhere Stabilität des Kipphebels als ohne diese Blechfaltung erreicht ist.In the rocker arm of JP 2001 13241 A, the first, valve-side end of the rocker arm is folded back by itself by bending the rocker arm plate over itself, so that a material thickening is formed in this area. In a provided with an internal screw hole this material thickening is a screw coming into contact with the valve to be actuated screwed in, due to said material thickening a higher stability of the rocker arm is achieved than without this metal folding.
In der US 7,021 ,260 B2 ist das erste, ventilseitige Ende des Kipphebels mit einer Befestigungsöffnung für eine Stellschraube versehen, wobei dieser erste Endbereich des Kipphebels, wie aus der dortigen Figur 3 ersichtlich, durch Umfaltungen von Seitenwangen eines U-förmigen Profils gebildet wurde, um derart ebenfalls eine Materialverdickung am Ort der Befestigungsöffnung zu erhalten.In US Pat. No. 7,021,260 B2, the first valve-side end of the rocker arm is provided with a fastening opening for an adjusting screw, this first end region of the rocker arm, as can be seen from FIG. 3, being formed by folding over side cheeks of a U-shaped profile. so as to likewise obtain a material thickening at the location of the attachment opening.
Schließlich ist aus der DE 103 38 837 A1 ein Ventil-Kipphebel bekannt, bei dem eine ventilseitige Stellschraube zwischen zwei Seitenwangen eines U-för- migen ersten Endes des Kipphebels angeordnet ist. Ein Fixieren der Stellschraube in einem mit einem Innengewinde versehenen Befestigungsloch erfolgt durch ein Kontern mit zwei Muttern oder mit einer Bundmutter oder mit einer Mutter mit Unterlegscheibe. Dabei sind die Muttern an der den Seitenwangen gegenüberliegenden Seite des Kipphebels angeordnet und daher im eingebauten Zustand an der Brennkraftmaschine nur schwer zugänglich.Finally, DE 103 38 837 A1 discloses a valve rocker arm in which a valve-side adjusting screw is arranged between two side cheeks of a U-shaped first end of the rocker arm. A fixing of the adjusting screw in an internally threaded mounting hole is made by a lock with two nuts or with a collar nut or with a nut with washer. The nuts are arranged on the side cheeks opposite side of the rocker arm and therefore difficult to access in the installed state of the internal combustion engine.
Nachteilig bei bekannten Kipphebeln ist, dass eine Fixierung oder Konterung der ventilseitigen Stellschraube mit zumindest einer Mutter, die zwischen den Seitenwangen eines U-förmigen Profils eines ersten Endes des Kipphebels angeordnet ist, sehr schwierig bis unmöglich ist, da das Anziehen oder Lösen dieser Muttern, beispielsweise mit einem Ringschlüssel oder Steckschlüssel, durch die Seitenwangen und die beengten Einbaumaße des Kipphebels praktisch nicht möglich ist. Aufgabe der ErfindungA disadvantage of known rocker arms is that a fixing or locking of the valve-side adjusting screw with at least one nut, which is arranged between the side cheeks of a U-shaped profile of a first end of the rocker arm is very difficult to impossible, since the tightening or loosening of these nuts, for example, with a ring spanner or socket wrench, through the side walls and the cramped installation dimensions of the rocker arm is practically impossible. Object of the invention
Der Erfindung liegt die Aufgabe zugrunde, einen Kipphebel für eine Brenn- kraftmaschine zu schaffen, dessen zwischen Seitenwangen angeordnete Stellschraube in einfacher Weise mittels einer Mutter fixiert werden kann.The invention has for its object to provide a rocker arm for an internal combustion engine, arranged between the side cheeks adjusting screw can be fixed in a simple manner by means of a nut.
Zusammenfassung der ErfindungSummary of the invention
Der Erfindung liegt die Erkenntnis zugrunde, dass zum Fixieren einer Stellschraube eines Kipphebels mindestens eine Mutter auf ein entsprechendes Außengewinde der Stellschraube aufgeschraubt und angezogen werden muss. Soll die Mutter an derjenigen Seite auf die Stellschraube aufgeschraubt wer- den, an der auch Seitenwangen eines U-förmigen Profils eines ventilseitigen ersten Endes des Kipphebels ausgebildet sind, ist es notwendig, die fixierende Mutter vom Grund des U-förmigen Profils, das beispielsweise durch einen Stanz- und Biegevorgang hergestellt wird, zu beabstanden. Hierzu ist ein zusätzlicher Abstandshalter vorgesehen, der den Schaft der Stellschraube um- greift und zwischen der mindestens einen Mutter und dem Grund des U-förmigen Profils angeordnet ist.The invention is based on the finding that for fixing a set screw of a rocker arm at least one nut must be screwed and tightened on a corresponding external thread of the screw. If the nut is to be screwed onto the adjusting screw at the side on which side cheeks of a U-shaped profile of a valve-side first end of the rocker arm are formed, it is necessary to remove the fixing nut from the bottom of the U-shaped profile, for example a punching and bending process is made to space. For this purpose, an additional spacer is provided, which engages around the shank of the adjusting screw and is arranged between the at least one nut and the base of the U-shaped profile.
Demnach betrifft die Erfindung gemäß den Merkmalen des Hauptanspruchs einen Kipphebel einer Brennkraftmaschine, wobei der Kipphebel mit einer Nocke betätigbar ist und an einem ersten, ventilseitigen Ende des Kipphebels eine mit einem Innengewinde versehene Ausnehmung ausgebildet ist, in die eine Stellschraube eingeschraubt ist, wobei das erste, ventilseitige Ende des Kipphebels ein U-förmiges Profil aufweist und die Stellschraube mit einer Mutter in der Ausnehmung fixiert ist. Außerdem ist bei diesem Kipphebel vorgese- hen, dass innerhalb eines U-förmigen Profils des ersten Endes des Kipphebels ein Abstandshalter zwischen einem Grund des U-förmigen Profils und der Mutter angeordnet ist.Accordingly, the invention according to the features of the main claim relates to a rocker arm of an internal combustion engine, wherein the rocker arm is actuated with a cam and at a first, valve-side end of the rocker arm is provided with an internally threaded recess into which an adjusting screw is screwed, wherein the first , Valve side end of the rocker arm has a U-shaped profile and the screw is fixed with a nut in the recess. In addition, this rocker arm is provided that within a U-shaped profile of the first end of the rocker arm a spacer is disposed between a bottom of the U-shaped profile and the nut.
Der Vorteil des Kipphebels gemäß der Erfindung besteht darin, dass durch den zusätzlichen Abstandshalter zwischen demjenigen Blechabschnitt des Kipphebels, der den Profilgrund bildet, sowie der auf die Stellschraube aufgeschraubten Mutter eine zusätzliche Beabstandung der Mutter vom Grund des Profils des Kipphebels erreicht wird.The advantage of the rocker arm according to the invention is that an additional spacing of the nut from the bottom of the profile of the rocker arm is achieved by the additional spacer between that sheet metal portion of the rocker arm, which forms the profile base, and the screwed onto the screw nut.
Dabei wird die Länge der Stellschraube und/oder die Höhe des Abstandhalters bevorzugt derart gewählt werden, dass auf die auf die Stellschraube aufgeschraubte Mutter beispielsweise mit einem Ringschlüssel eingewirkt werden kann, ohne das die Seitenwangen diese Einwirkung verhindern. Zudem kann ein solcher Abstandshalter derart leichtgewichtig ausgeführt sein, dass die gesamte bewegte Masse des Kipphebels nur unwesentlich erhöht ist. Es versteht sich in Kenntnis der Erfindung von selbst, dass auch mehrere Muttern bezüglich der Stellschraube gekontert werden können oder dass eine Mutter mit einer Vorrichtung zur Selbstsicherung aufgeschraubt werden kann.In this case, the length of the adjusting screw and / or the height of the spacer is preferably selected such that the screwed onto the screw nut, for example, can be acted upon with a ring spanner, without preventing the side cheeks this action. In addition, such a spacer can be designed so lightweight that the entire moving mass of the rocker arm is only slightly increased. It is understood in the knowledge of the invention of itself that several nuts can be countered with respect to the screw or that a mother can be screwed with a device for self-assurance.
Gemäß einer Weiterbildung des Erfindungsgebenstandes ist vorgesehen, dass die Höhe des Abstandshalters mindestens so hoch oder vorzugsweise sogar noch höher ist wie die Höhe der Seitenwangen, gemessen vom Grund des U-förmigen Profils, um die Mutter oberhalb der Seitenwangen zu positionieren, so dass eine Betätigung derselben stets ohne Einschränkung möglich ist.According to one embodiment of the invention, it is provided that the height of the spacer is at least as high or preferably even higher than the height of the side walls, measured from the bottom of the U-shaped profile to position the nut above the side cheeks, so that an actuation the same is always possible without restriction.
Gemäß einer besonderen Ausführungsform des Kipphebels ist vorgesehen, dass der Abstandshalter unmittelbar und damit einstückig an der Mutter ausgebildet ist sowie eine runde oder mehreckige Außengeometrie aufweist. Demnach wird eine axial soweit verlängerte Schraube genutzt, dass deren Schraubenkopf über die Höhe der Seitenwangen des Kipphebels hinaus- ragt.According to a particular embodiment of the rocker arm is provided that the spacer is formed directly and thus integrally with the nut and has a round or polygonal outer geometry. Accordingly, a screw which has been extended axially so far is used that its screw head extends beyond the height of the side cheeks of the rocker arm. protrudes.
Ein zusätzlicher separater Abstandshalter ist beispielsweise als Ring oder als blockförmige Scheibe mit einer mittigen Ausnehmung ausgebildet und besteht aus einem geeigneten Material, beispielsweise einem Hartkunststoff oder ei- nem Metall. Er kann als ein separates Bauteil ausgebildet sein, das erst bei derAn additional separate spacer is designed, for example, as a ring or as a block-shaped disk with a central recess and consists of a suitable material, for example a hard plastic or a metal. It may be formed as a separate component, which only at the
Montage des Kipphebels auf die Stellschraube aufgesteckt und mit der Mutter gemeinsam fixiert wird. Ebenso ist es möglich, dass der Abstandshalter mit dem Kipphebel fest verbunden ist. Ein separater Abstandshalter aus Metall wird beispielsweise mittels einer Punktschweißung oder einer Klebung an dem Kipphebel fixiert, um ein Verlieren zu vermeiden.Mount the rocker arm on the adjusting screw and fix it together with the nut. It is also possible that the spacer is firmly connected to the rocker arm. A separate metal spacer is fixed to the rocker arm, for example by means of spot welding or gluing, to avoid losing it.
In gleicher Weise können die Seitenwangen derart verformt bzw. geprägt sein, dass ein Abstandshalter aus Metall oder Kunststoff am Ort der Ausnehmung für die Stellschraube fixiert ist. Ein solcher zusätzlicher Prägevorgang kann vor- teilhaft bei der Herstellung des Kipphebels ausgeführt werden.In the same way, the side cheeks can be deformed or embossed such that a spacer made of metal or plastic is fixed at the location of the recess for the set screw. Such an additional embossing process can be advantageously carried out in the manufacture of the rocker arm.
Weiterhin wird vorgeschlagen, dass der zusätzliche Abstandshalter einstückig zusammen mit dem ersten, ventilseitigen Ende des Kipphebels ausgebildet ist. Dies kann beispielsweise dadurch erfolgen, dass der Grund des Profils an diesem Ende des Kipphebels mit einer größeren stirnseitigen Länge als für den an sich Kipphebel benötigt ausgeführt wird. Dieser in Längsrichtung des Kipphebels von der Drehachse des Kipphebels wegweisende Abschnitt kann nachfolgend in einem Bearbeitungsschritt im Wesentlichen auf sich selbst zurück umgefaltet werden, so dass diese Umfaltung innerhalb der Seitenwangen auf sich selbst bzw. auf dem eigentlichen ersten Ende des Kipphebels zu liegen kommt.Furthermore, it is proposed that the additional spacer is integrally formed together with the first, valve-side end of the rocker arm. This can be done, for example, that the reason of the profile is performed at this end of the rocker arm with a larger frontal length than needed for the toggle lever itself. This pointing away in the longitudinal direction of the rocker arm of the axis of rotation of the rocker arm section can subsequently be folded over in a processing step substantially back on itself, so that this refolding comes to rest within the side cheeks on itself or on the actual first end of the rocker arm.
Es versteht sich in Kenntnis der Erfindung von selbst, dass die mit einemIt is understood in the knowledge of the invention by itself that with a
Innengewinde versehene Ausnehmung sowohl den Grund des Profils als auch diese Umfaltung gemeinsam durchgreift, um die Stellschraube einführen und fixieren zu können. Es ist jedoch auch möglich, dass das Innengewinde nur im nur im Grundkörper oder nur in dem Umfaltungsabschnitt ausgebildet ist, wobei dann der Bohrungsdurchmesser in dem jeweils gewindelosen Abschnitt etwas größer ist als der Gewindedurchmesser. Bei diesen Ausgestaltungen ist ein Verlieren des Abstandshalters jeweils ausgeschlossen.Internally threaded recess both the bottom of the profile as well as this refolding passes through together to insert the screw and to be able to fix. However, it is also possible that the internal thread is formed only in only in the main body or only in the refolding portion, in which case the bore diameter in the respectively non-threaded portion is slightly larger than the thread diameter. In these embodiments, a loss of the spacer is excluded in each case.
In einer dazu alternativen Variante ist vorgesehen, dass der Grund des U-för- migen Profils im Bereich der Ausnehmung U-förmig ausgeschnitten wird und nachfolgend eine Umfaltung dieses U-förmigen Abschnitts in Richtung zum stirnseitigen und ventilnahen Ende des Kipphebels erfolgt. Schließlich wird eine Lochung in diesem umgefalteten U-förmigen Abschnitt durchgeführt. Somit wird einerseits eine zusätzliche Beabstandung der Mutter vom eigentlichen Grund des U-förmigen Profils erreicht und durch die Ausstanzung im Grund des Profils zwischen den beiden Seitenwangen des Kipphebels wird die Blech- umfaltung ohne zusätzliche Materialabschnitte erhalten, so dass das Gesamtgewicht des Kipphebels praktisch nicht erhöht ist. Hierzu ist es dem Fachmann möglich, beispielsweise Wandstärken und Materialien der Kipphebel derart zu wählen, dass diese dennoch über ausreichende Stabilitäten und Festigkeiten verfügen.In an alternative variant, it is provided that the base of the U-shaped profile is cut out in the shape of a U-shape in the region of the recess, and subsequent refolding of this U-shaped section takes place in the direction of the end-side and valve-near end of the rocker arm. Finally, a perforation is made in this folded-over U-shaped section. Thus, on the one hand, an additional spacing of the nut from the actual bottom of the U-shaped profile is achieved and the punched-out in the bottom of the profile between the two side cheeks of the rocker arm sheet metal is obtained without additional material sections, so that the total weight of the rocker arm practically not increased is. For this purpose, it is possible for the skilled person, for example, to choose wall thicknesses and materials of the rocker arms such that they nevertheless have sufficient stabilities and strengths.
Bei beiden vorstehend beschriebenen Ausführungsformen ist mit Vorteil vorgesehen, dass der umgefaltete Abschnitt bzw. der umgefaltete U-förmige Abschnitt am Grund des ersten Endes des Kipphebels formschlüssig und/oder stoffschlüssig fixiert ist. Eine stoffschlüssige Fixierung der Umfaltung kann beispielsweise durch Punktschweißen realisiert sein.In both embodiments described above, it is advantageously provided that the folded-over section or the folded-over U-shaped section is fixed in a form-fitting and / or material-locking manner to the bottom of the first end of the rocker arm. A cohesive fixation of the refolding can be realized for example by spot welding.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Die Erfindung wird im Folgenden anhand der beiliegenden Zeichnung an Aus- führungsbeispielen näher erläutert. Darin zeigtThe invention will be described below with reference to the attached drawing, in which guide examples explained in more detail. It shows
Fig. 1 einen Kipphebel mit einem separaten Abstandshalter,1 a rocker arm with a separate spacer,
Fig. 2 einen Kipphebel mit einem anderen separaten Abstandshalter,2 shows a rocker arm with another separate spacer,
Fig. 3 einen Kipphebel mit einem separaten Abstandshalter und mit an den Abstandshalter zu dessen Fixierung angeformten Seitenwangen in einer Draufsicht,3 shows a rocker arm with a separate spacer and molded onto the spacer for fixing its side cheeks in a plan view,
Fig. 4 einen Kipphebel mit einem integrierten Abstandshalter, hergestellt durch eine Blech-Umfaltung, undFig. 4 is a rocker arm with an integrated spacer, made by a sheet metal refolding, and
Fig. 5 einen weiteren Kipphebel mit einem integrierten Abstandshalter, hergestellt durch eine gesonderte Stanzung und eine Blech-5 shows a further rocker arm with an integrated spacer, produced by a separate punching and a sheet metal
Umfaltung.Refolding.
Detaillierte Beschreibung der ZeichnungenDetailed description of the drawings
In den Figuren 1 und 2 ist jeweils ein Kipphebel 1 in einer perspektivischen Darstellung gezeigt, der an seinem zweiten, ventilfernen Ende mittels einer zur Vereinfachung der Darstellung hier nicht abgebildeten und auf einer Nockenwelle einer Brennkraftmaschine angeordneten Nocke in an sich bekannter Weise betätigt werden kann. An einem ersten, ventilseitigen Ende 2 des Kipphebels 1 ist eine in Fig. 3 erkennbare Ausnehmung 3 ausgebildet, die üblicherweise über ein Innengewinde verfügt. In die Ausnehmung 3 ist eine Stellschraube 4 eingeschraubt, die einenends Schlüsselflächen in Form eines Vierkants 5 für ein Betätigungswerkzeug aufweist. Mit ihrem anderen Ende kann die Stellschraube 4 unmittelbar oder über ein weiteres Stellglied mit einem Ventil in Kontakt gebracht werden. Zur Fixierung oder Konterung der Stellschraube 4 an dem Kipphebel 1 in einer gewünschten Stelltiefe dient in an sich bekannter Weise eine Mutter 6.In Figures 1 and 2 respectively a rocker arm 1 is shown in a perspective view, which can be actuated at its second end remote from the valve by means of a not shown here for simplicity of illustration and arranged on a camshaft of an internal combustion engine cam in a conventional manner. At a first, valve-side end 2 of the rocker arm 1 a recognizable in Fig. 3 recess 3 is formed, which usually has an internal thread. In the recess 3, a set screw 4 is screwed, which has one end key surfaces in the form of a square 5 for an operating tool. With its other end, the adjusting screw 4 directly or via another actuator with a Valve be brought into contact. For fixation or locking of the adjusting screw 4 on the rocker arm 1 in a desired position depth is used in a conventional manner a nut. 6
Das erste, ventilseitige Ende 2 des Kipphebels 1 weist ein im Wesentlichen U-förmiges Profil mit zwei Seitenwangen 7 und 8 sowie einen die beiden Seitenwangen verbindenden Grund 9 des Profils auf. Der gesamte Kipphebel 1 ist bei dessen Herstellung aus einem Blechzuschnitt ausgestanzt, in gewünschter Weise gelocht und umgeformt worden.The first, valve-side end 2 of the rocker arm 1 has a substantially U-shaped profile with two side cheeks 7 and 8 and a bottom 9 of the profile connecting the two side cheeks. The entire rocker arm 1 has been punched out during its production from a sheet metal blank, perforated in the desired manner and reshaped.
Um das Anziehen der Mutter 6 auch dann zu ermöglichen, wenn die Mutter 6 von derjenigen Seite her auf die Stellschraube 4 aufgeschraubt wird, an der auch die beiden Seitenwangen 7, 8 des U-förmigen Profils angeordnet sind, ist zusätzlich ein Abstandshalter 10 vorgesehen, der zwischen der Mutter 6 und dem Grund 9 des U-förmigen Profils angeordnet ist und den Schaft der Stell- schraube 4 koaxial umgreift.In order to allow the tightening of the nut 6 even when the nut 6 is screwed from the side on the adjusting screw 4, on which the two side cheeks 7, 8 are arranged of the U-shaped profile, a spacer 10 is additionally provided which is arranged between the nut 6 and the base 9 of the U-shaped profile and the shaft of the adjusting screw 4 coaxially surrounds.
In Fig. 1 ist der Abstandshalter 10 als ein separater Ring ausgebildet, beispielsweise aus einem Hartkunststoff oder einem Metall. Bei einer Ausführung in Metall kann der Abstandshalter 10 mit einer Punktschweißung oder einer Klebung am Grund 9 des Kipphebels 1 befestigt sein, um ein Verlieren desselben zu vermeiden.In Fig. 1, the spacer 10 is formed as a separate ring, for example of a hard plastic or a metal. In a metal embodiment, the spacer 10 may be spot welded or glued to the base 9 of the rocker arm 1 to prevent it from being lost.
In gleicher Weise kann der Abstandshalter 10, wie in Fig. 2 dargestellt, als im Wesentlichen rechteckige oder quadratische Scheibe 12 oder Block mit einer mittigen Ausnehmung für die Stellschraube 4 ausgebildet sein. Eine solche Ausführung des Abstandshalters 10 begünstigt bei einer Montage die koaxiale Ausrichtung der Ausnehmung desselben und der Ausnehmung 3 im Grund 9 des Kipphebel 1. Bei den beiden Varianten des Abstandshalters 10 gemäß Fig. 1 und Fig. 2 ist die Höhe derselben, in axialer Richtung der Stellschraube 4 gesehen, derart gewählt, dass diese zumindest weitgehend der Höhe der Seitenwangen 7, 8 entspricht oder die Seitenwangenhöhe sogar noch übertrifft.In the same way, as shown in FIG. 2, the spacer 10 may be formed as a substantially rectangular or square disc 12 or block with a central recess for the adjusting screw 4. Such an embodiment of the spacer 10 favors in a mounting the coaxial alignment of the recess thereof and the recess 3 in the bottom 9 of the rocker arm first In the two variants of the spacer 10 according to FIG. 1 and FIG. 2, the height of the same, seen in the axial direction of the adjusting screw 4, chosen such that it at least largely corresponds to the height of the side cheeks 7, 8 or even exceeds the side cheek height.
Eine dazu alternative Befestigungsmöglichkeit für den Abstandshalter 10, hier in Form eines Rings, besteht in einer Prägung bzw. Verformung der Seitenwangen 7 und 8, um den Abstandshalter 10 zwischen den Seitenwangen 7, 8 einzuklemmen, wie in Fig. 3 gezeigt ist.An alternative mounting option for the spacer 10, here in the form of a ring, is an embossing or deformation of the side cheeks 7 and 8, to clamp the spacer 10 between the side cheeks 7, 8, as shown in Fig. 3.
Eine weitere Möglichkeit zur Ausgestaltung des Abstandshalters ist in Fig. 4 dargestellt. Dabei ist der Grund 9 des U-förmigen Profils des ersten Endes 2 des Kipphebels 1 stirnseitig verlängert ausgeführt und um 180° auf sich selbst zurückgefaltet. Dies kann mit an sich bekannten Bearbeitungsmaschinen erfol- gen, wobei der Fachmann die Materialstärke bzw. die hierzu geeigneten Materialien auswählen kann. Es versteht sich, dass der umgefaltete Abschnitt 11 ebenfalls über eine Ausnehmung 3 zum Hindurchstecken bzw. Einschrauben der Stellschraube 4 verfügt.Another possibility for the design of the spacer is shown in Fig. 4. In this case, the base 9 of the U-shaped profile of the first end 2 of the rocker arm 1 is executed extended end face and folded back by 180 ° on itself. This can be done by means of processing machines known per se, with the person skilled in the art selecting the material thickness or the materials suitable for this purpose. It is understood that the folded-over portion 11 also has a recess 3 for passing or screwing in the adjusting screw 4.
Schließlich ist in Fig. 5 eine weitere Ausführungsform dargestellt, bei welcher der Grund 9 des ersten Endes 2 des Kipphebels 1 vor dessen stirnseitigen Ende und vor der kipphebelseitigen Ausnehmung 3 im Wesentlichen U-förmig ausgestanzt ist. Nachfolgend wird dieser U-förmige Abschnitt 12 ebenfalls um 180° auf sich selbst bzw. auf den Grund 9 zum stirnseitigen Ende 2 hin umge- faltet und die Ausnehmung 3 in diese doppelte Materiallage eingebracht, um die Stellschraube 4 einschrauben zu können. Wie Fig. 5 außerdem zeigt, ist an dem Grund 9 des Kipphebels 1 ein in Richtung zum Ventil weisender Führungsabschnitt 13 ausgebildet, der zur Vergrößerung der Einschraublänge der Stellschraube 4 dient. Bei beiden vorstehenden Ausführungsformen gemäß Fig. 4 und Fig. 5 können die umgefalteten Abschnitte 11 , 12 noch mittels einer Punktschweißung in der umgefalteten Position fixiert werden. Bei diesen beiden Ausgestaltungen ist die Höhe des derart gebildeten Abstandshalters üblicherweise geringer als die Höhe der Seitenwangen 7, 8. Bei geeigneter Auswahl einer Mutter 6 kann dennoch mit einem Betätigungswerkzeug auf die Mutter 6 zumindest auf denjenigen Abschnitt der Mutter 6 eingewirkt werden, der in axialer Richtung der Stellschraube 4 gesehen über die Seitenwangen 7, 8 übersteht.Finally, a further embodiment is shown in Fig. 5, in which the bottom 9 of the first end 2 of the rocker arm 1 is punched out in front of the front end and in front of the rocker arm-side recess 3 is substantially U-shaped. Subsequently, this U-shaped section 12 is also folded over by 180 ° on itself or on the bottom 9 to the front end 2 out and introduced the recess 3 in this double layer of material in order to screw the screw 4 can. As also shown in FIG. 5, on the base 9 of the rocker arm 1, a guide section 13 pointing in the direction of the valve is formed, which serves to increase the screw-in length of the adjusting screw 4. In both of the above embodiments according to FIGS. 4 and 5, the folded-over sections 11, 12 can still be fixed in the folded-over position by means of spot welding. In these two embodiments, the height of the spacer thus formed is usually less than the height of the side cheeks 7, 8. With a suitable selection of a nut 6 can still be acted with an operating tool on the nut 6 at least on that portion of the nut 6, in axial Direction of the adjusting screw 4 seen on the side walls 7, 8 protrudes.
Zur Vereinfachung der Darstellung ist das Innengewinde in der Ausnehmung 3 jeweils nicht abgebildet. For ease of illustration, the internal thread in the recess 3 is not shown.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Kipphebel1 rocker arm
2 Erstes, ventilseitiges Ende des Kipphebels2 First, valve-side end of the rocker arm
3 Ausnehmung3 recess
4 Stellschraube4 adjusting screw
5 Vierkant5 square
6 Mutter6 mother
7 Seitenwange7 side cheek
8 Seitenwange8 side cheek
9 Grund des Kipphebels9 Ground of the rocker arm
10 Abstandshalter10 spacers
11 Umgefalteter Abschnitt11 Folded section
12 U-förmiger Abschnitt12 U-shaped section
13 Führungsabschnitt 13 guide section

Claims

Patentansprüche claims
1. Kipphebel (1 ) einer Brennkraftmaschine, wobei der Kipphebel (1 ) mit einer Nocke betätigbar ist und an einem ersten, ventilseitigen Ende (2) des Kipphebels (1 ) eine mit einem Innengewinde versehene Ausnehmung (3) ausgebildet ist, in die eine Stellschraube (4) eingeschraubt ist, wobei das erste, ventilseitige Ende (2) des Kipphebels (1 ) ein U- förmiges Profil aufweist und die Stellschraube (4) mit einer Mutter (6) in der Ausnehmung (3) fixiert ist, dadurch gekennzeichnet, dass innerhalb eines U-förmigen Profils des ersten, ventilseitigen Endes (2) des Kipphebels (1 ) ein Abstandshalter (10) zwischen einem Grund (9) des U- förmigen Profils und der Mutter (6) angeordnet ist.1. rocker arm (1) of an internal combustion engine, wherein the rocker arm (1) is actuated with a cam and at a first, valve-side end (2) of the rocker arm (1) is provided with an internal thread recess (3), in which a Adjusting screw (4) is screwed, wherein the first, valve-side end (2) of the rocker arm (1) has a U-shaped profile and the adjusting screw (4) with a nut (6) in the recess (3) is fixed, characterized in that, within a U-shaped profile of the first, valve-side end (2) of the rocker arm (1), a spacer (10) is arranged between a base (9) of the U-shaped profile and the nut (6).
2. Kipphebel nach Anspruch 1 , dadurch gekennzeichnet, dass der Abstandshalter (10), in axialer Richtung der Stellschraube (4) gesehen, mindestens so hoch oder höher ist wie die Seitenwangen (7, 8) des U-förmigen Profils.2. Rocker arm according to claim 1, characterized in that the spacer (10), seen in the axial direction of the adjusting screw (4), at least as high or higher as the side cheeks (7, 8) of the U-shaped profile.
3. Kipphebel nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Abstandshalter (10) unmittelbar an der Mutter (6) ausgebildet ist und eine runde oder mehreckige Außengeometrie aufweist.3. Rocker arm according to one of claims 1 or 2, characterized in that the spacer (10) is formed directly on the nut (6) and has a round or polygonal outer geometry.
4. Kipphebel nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Abstandshalter (10) lösbar oder fest mit dem Kipphebel (1 ) verbunden ist.4. rocker arm according to claim 1 or 2, characterized in that the spacer (10) is releasably or firmly connected to the rocker arm (1).
5. Kipphebel nach zumindest einem der Ansprüche 1 , 2 und 4, dadurch gekennzeichnet, dass die Seitenwangen (7, 8) an den Abstandshal- ter (10) angeprägt oder angeformt sind. 5. Rocker arm according to at least one of claims 1, 2 and 4, characterized in that the side cheeks (7, 8) on the spacer (10) are embossed or molded.
6. Kipphebel nach zumindest einem der Ansprüche 1 , 2, 4 und 5, dadurch gekennzeichnet, dass der Abstandshalter (10) einstückig zusammen mit dem ersten, ventilseitigen Ende (2) des Kipphebels (1 ) ausgebildet ist.6. Rocker arm according to at least one of claims 1, 2, 4 and 5, characterized in that the spacer (10) is formed integrally with the first, valve-side end (2) of the rocker arm (1).
7. Kipphebel nach Anspruch 6, dadurch gekennzeichnet, dass der Abstandshalter (10) einstückig zusammen mit dem ersten, ventilseitigen Ende (2) des Kipphebels (1 ) durch eine Umfaltung eines überstehenden Abschnitts (11 ) auf den Grund (9) des ersten, ventilseitigen Ende (2) des7. rocker arm according to claim 6, characterized in that the spacer (10) integrally together with the first, valve-side end (2) of the rocker arm (1) by a folding over a protruding portion (11) on the bottom (9) of the first, Valve end (2) of the
Kipphebels (1 ) gebildet ist.Rocker arm (1) is formed.
8. Kipphebel nach Anspruch 6, dadurch gekennzeichnet, dass am Grund (9) des U-förmigen Profils ein U-förmiger Abschnitt (12) ausge- schnitten, zum stirnseitigen Ende (2) des Kipphebels (1 ) umgefaltet und mit einer Ausnehmung (3) versehen ist.8. Rocker arm according to claim 6, characterized in that at the base (9) of the U-shaped profile a U-shaped section (12) cut out, folded over to the front end (2) of the rocker arm (1) and with a recess ( 3) is provided.
9. Kipphebel nach Anspruch 6, 7 oder 8 dadurch gekennzeichnet, dass der umgefaltete Abschnitt (11 ) oder der umgefaltete U-förmige Abschnitt (12) am Grund (9) des ersten Endes (2) des Kipphebels (1 ) formschlüssig und/oder stoffschlüssig fixiert ist. 9. rocker arm according to claim 6, 7 or 8, characterized in that the folded-over portion (11) or the folded U-shaped portion (12) at the bottom (9) of the first end (2) of the rocker arm (1) positively and / or is firmly bonded.
EP08736306A 2007-05-10 2008-04-17 Rocker arm of an internal combustion engine Not-in-force EP2156021B1 (en)

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JP2010526958A (en) 2010-08-05
DE502008001539D1 (en) 2010-11-25
ATE484656T1 (en) 2010-10-15
DE102007021855A1 (en) 2008-11-13
WO2008138702A1 (en) 2008-11-20
EP2156021B1 (en) 2010-10-13

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