EP1913239A1 - Connection element for the secure fixing of a lever-type cam follower - Google Patents
Connection element for the secure fixing of a lever-type cam followerInfo
- Publication number
- EP1913239A1 EP1913239A1 EP06776457A EP06776457A EP1913239A1 EP 1913239 A1 EP1913239 A1 EP 1913239A1 EP 06776457 A EP06776457 A EP 06776457A EP 06776457 A EP06776457 A EP 06776457A EP 1913239 A1 EP1913239 A1 EP 1913239A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam follower
- connecting element
- lever
- projections
- support element
- 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
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
-
- 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
- F01L2305/00—Valve arrangements comprising rollers
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49295—Push rod or rocker arm making
-
- 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
-
- 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
- Y10T74/21—Elements
- Y10T74/2101—Cams
- Y10T74/2107—Follower
Definitions
- the invention relates to a connecting element made of flat material for the captive mounting of a lever-like cam follower, which is used to actuate a gas exchange valve of an internal combustion engine, on a support element which has a cylindrical section continuously or without undercut transitional spherical end on which the cam follower by means of a dome-shaped Induction in the direction of the gas exchange valve is pivotally mounted about a pivot point.
- the connecting element surrounds the cylindrical portion with elastically deformable and outgoing from central webs projections parallel to the pivot axis of the cam follower such that the connecting element is merely frictionally connected to the cylindrical portion.
- Such fasteners are known to allow the generation of a structural unit, for example, a cam follower as a cam follower and a
- Support element includes. With such a unit, the risk of potential incorrect assembly in the cylinder head of the internal combustion engine is then minimized.
- This incorrect assembly could include, but is not limited to ; that the tow lift! rotated by 180 ° in the valve gear is mounted.
- the contact partners would be ball head of the support element and calotte of the finger lever as well
- Valve stem end and corresponding counter surface swapped on the rocker arm are swapped on the rocker arm.
- connecting elements which engage positively in an annular groove below the ball head
- frictionally acting connecting elements are advantageously used in cases in which the annular groove is not or not economically producible undercut.
- Other requirements for such a connecting element consist not only in that a separation of rocker arm and support element is reliably excluded by transport influences, but that the rocker arm and the support element aligned with the aid of the connecting element during assembly of the assembly in the internal combustion engine the operating state according to each other stay.
- the connecting element also has the task of largely securing the towing lever against tilting about its longitudinal axis by suitable lateral support on the support element, in order to ensure perfect transverse alignment of the finger lever on the camshaft to be mounted.
- a tilting of the drag lever about its longitudinal axis is referred to below as a tilting movement in contrast to the pivotal movement in the direction of the gas exchange valve.
- the proposed in the cited document connecting element still has some significant disadvantages. So it is flat formed projections which extend only in a direction parallel to the pivot axis of the finger lever level. It follows, on the one hand, that the correct crossover direction of the rocker arm on the support element favoring lever arm between the contact points of the projections and the pivot point of the rocker arm is disadvantageously small. On the other hand, due to the not only flat but also short protrusions, it is necessary for the spreading of the protrusions required for mounting the connecting element to be largely applied by elastic deformation of the webs from which the protrusions originate, due to their limited material elasticity. However, there is the risk of undesirable mutual distortion of the webs, for example in the form of a swelling, torsion or entanglement. Such a deformation of the connecting element may also lead to misalignment of the finger lever due to offset in height projections. In connection with the mentioned short lever arm is moreover an increased risk that the connecting element slips in the tilting direction of the finger lever.
- a drag lever which is correctly aligned on the support element can be of significance not only for the transport and assembly of the assembly but also for fail-safe operation in the internal combustion engine.
- the cam follower aligning effect of the cam be canceled.
- causes of such a loss of contact may be an undesirable sinking of the mostly used support elements with hydraulic valve clearance compensation or a lifting of the finger lever from the cam due to an overspeed of the internal combustion engine.
- a "skewed" connecting element would then push the rocker arm in the direction of tilting, in which, in particular, drag levers are very narrow Observe cam contact surface.
- the object of the invention is therefore to provide a connecting element of the aforementioned type, in which the cited disadvantages are eliminated by simple means. Accordingly, in relation to the connecting elements known in the prior art, it is to be ensured that, on the one hand, the cam follower on the supporting element is kept sufficiently captive and, on the other hand, the correct lateral alignment of the cam follower on the supporting element has an increased robustness. Robustness here is to be understood as meaning the stability of the required transverse alignment of the cam follower under the influence of disturbing influences, which include, for example, the aforementioned component tolerances.
- the object is achieved in that the projections are designed as tabs extending from the central webs in a direction away from the cam follower extending tabs, so that the projections are as such form-elastic.
- the central webs are to belong to a closed and substantially planar ring portion which rests against a support element facing the first side of a dome-shaped indentation surrounding bottom of the cam follower.
- the ring portion angled and oriented in the longitudinal direction of the cam follower retaining claws, which are engaged with retaining lugs on a side facing away from the support element of the bottom.
- the sufficiently large lever arm is then generated in that the tabs engage around the cylindrical portion of the support element at contact points whose projected to a longitudinal axis of the support element distance to the pivot point is greater than a projected on the longitudinal axis distance of the flat ring portion to the fulcrum.
- the cam follower should be designed as a drag lever, which has a generally U-shaped cross section and is made without cutting of sheet metal material.
- a connecting element is advantageously provided a non-cutting produced Umformteil of spring-hard sheet metal material.
- Such a connecting element is particularly simple and inexpensive to produce and process- securely mountable on the cam follower.
- a particularly preferred embodiment of the invention is finally given by a combination of the mentioned in the dependent claim 5 and previously explained features.
- Figure 2 shows the connecting element according to Figure 1 in an enlarged perspective view.
- FIG. 1 shows a detail of a valve train 1 of an internal combustion engine is disclosed in the assembled state.
- a cam follower 2 which is driven in a manner known per se via a cam (not shown) by means of a roller 3 connected to the cam follower 2 and rotatably mounted in the direction of actuation of a gas exchange valve 4.
- a roller 3 connected to the cam follower 2 and rotatably mounted in the direction of actuation of a gas exchange valve 4.
- the cam follower 2 is formed in the embodiment as a drag lever 5, which has a generally U-shaped cross-section in the longitudinal direction and is made inexpensively from sheet metal in a chipless forming process.
- a supporting element 6 mounted in a stationary manner in the internal combustion engine has a spherical end 7 on which the cam follower 2 is mounted so as to be pivotable about a pivot point 9 in the direction of the gas exchange valve 4 by means of a slot-shaped indentation 8.
- the connecting element 10 is formed as a non-cutting formed part of spring-hard sheet material and has a closed ring portion 11 which abuts a Abst demtzelement 6 facing first side 12 of a dome-shaped indentation 8 surrounding bottom 13 of the finger lever 5. From the ring portion 11 go by about 90 ° angled and oriented in the longitudinal direction of the drag lever 5 retaining claws 14, 15, which are latched with retaining lugs 16 on a Abst ⁇ tzelement 6 remote from the second side 17 of the bottom 13.
- the connecting element 10 is fixed in this way on the finger lever 5, wherein on the retaining claw 14 additional angles 18 are provided, which support an exact longitudinal alignment of the connecting element 10 relative to the finger lever 5.
- the ring portion 11 comprises central webs 19, of which angled and designed as tabs 20 projections 21 emanate in a direction away from the finger lever 5 direction.
- the spherical end 7 is stepless and undercut in a cylindrical portion 22, which engage around the tabs 20 parallel to the axis passing through the pivot point 9 pivot axis of the finger lever 5.
- the clear distance between the tabs 20 to each other smaller than the diameter of the cylindrical portion 22.
- the tabs 20 deform elastically and connect the supporting element 6 frictionally engages with the connecting element 10 fixed on the towing lever 5.
- a structural unit 23 consisting of the drag lever 5, the supporting element 6 and the connecting element 10 is formed, which captively holds the drag lever 5 in the unassembled state of the valvetrain 1 on the supporting element 6 stops.
- FIG. 1 shows a considerably smaller lever arm 26, as it is used in non-angled projections. in the cited prior art would, drawn.
- the tabs 20 are as such form-elastic. This means that the elastic deformation required for mounting the connecting element 10 on the cylindrical portion 22 of the supporting element 6 is largely absorbed by the tabs 20 and only to a small extent by the webs 19 or the annular portion 11. Consequently, the risk of swelling, entanglement, torsion or a similar deformation of the webs 19 or the ring portion 11 is minimized with correspondingly on the cylindrical portion 22 vertically offset attacking tabs 20 and a resulting misalignment of the finger lever 5 on the support member 6 largely excluded.
- the tabs 20 are designed in the illustrated embodiment so that they are angled just after a transition radius as well as with respect to the central webs by 90 ° and therefore parallel. As alternative embodiments, conically tapering and / or multiple or completely curved tabs are also possible.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention relates to a connection element (10) consisting of a flat material for the secure fixing of a lever-type cam follower (2) used to actuate a gas exchange valve (4) of an internal combustion engine, to a supporting element (6) comprising a spherical end (7) extending from a cylindrical section (22) in a continuous manner or without undercuts, on which end the cam follower (2) is mounted in such a way that it can pivot about a rotary point (9), by means of a cap-type formation (8), in the direction of the gas exchange valve (4). Said connecting element (10) surrounds the cylindrical section (22) with elastically deformable projections (21) extending from central sections (19), parallel to the pivoting axis of the cam follower (2), in such a way that the connection element (10) is only connected to the cylindrical section (22) in a frictionally engaged manner. The projections (21) are embodied as tongues (20) which are at an angle to the central sections (19) and extend in a direction opposing the cam follower (2), such that the projections (21) are, as such, elastically deformable.
Description
Bezeichnung der Erfindung Name of the invention
Verbindungselement zur verliersicheren Halterung eines hebelartigen Nockenfol- gersConnecting element for the captive mounting of a lever-type cam follower
Beschreibungdescription
Gebiet der ErfindungField of the invention
Die Erfindung betrifft ein Verbindungselement aus Flachmaterial zur verliersicheren Halterung eines hebelartigen Nockenfolgers, der zur Betätigung eines Gaswechselventils einer Brennkraftmaschine dient, an einem Abstützelement, das ein aus einem zylindrischen Abschnitt stufenlos oder hinterschnittsfrei übergehendes sphärisches Ende aufweist, auf dem der Nockenfolger mittels einer kalottenförmi- gen Einformung in Richtung des Gaswechselventils um einen Drehpunkt schwenkbeweglich gelagert ist. Dabei umgreift das Verbindungselement den zylindrischen Abschnitt mit elastisch verformbaren und von zentralen Stegen ausgehenden Vorsprüngen parallel zur Schwenkachse des Nockenfolgers derart, dass das Verbindungselement lediglich reibschlüssig mit dem zylindrischen Abschnitt verbunden ist.The invention relates to a connecting element made of flat material for the captive mounting of a lever-like cam follower, which is used to actuate a gas exchange valve of an internal combustion engine, on a support element which has a cylindrical section continuously or without undercut transitional spherical end on which the cam follower by means of a dome-shaped Induction in the direction of the gas exchange valve is pivotally mounted about a pivot point. In this case, the connecting element surrounds the cylindrical portion with elastically deformable and outgoing from central webs projections parallel to the pivot axis of the cam follower such that the connecting element is merely frictionally connected to the cylindrical portion.
Hintergrund der ErfindungBackground of the invention
Derartige Verbindungselemente ermöglichen bekanntermaßen die Erzeugung einer Baueinheit, die beispielsweise einen Schlepphebel als Nockenfolger und einSuch fasteners are known to allow the generation of a structural unit, for example, a cam follower as a cam follower and a
Abstützelement beinhaltet. Mit einer solchen Baueinheit wird dann das Risiko einer potenziellen Fehlmontage in den Zylinderkopf der Brennkraftmaschine minimiert.Support element includes. With such a unit, the risk of potential incorrect assembly in the cylinder head of the internal combustion engine is then minimized.
Diese Fehlmontage könnte unter anderem darin bestehen; dass der Schlepphebe! um 180° verdreht im Ventiltrieb montiert wird. In diesem Fall wären die Kontakt- partner Kugelkopf des Abstützelements und Kalotte des Schlepphebels sowieThis incorrect assembly could include, but is not limited to ; that the tow lift! rotated by 180 ° in the valve gear is mounted. In this case, the contact partners would be ball head of the support element and calotte of the finger lever as well
Ventilschaftende und entsprechende Gegenfläche am Schlepphebel vertauscht.Valve stem end and corresponding counter surface swapped on the rocker arm.
Dies würde zumindest zu einer Ventiltriebsfehlfunktion und im schlimmsten Fall sogar zu einem gravierenden Motorschaden führen.
Gegenüber Verbindungselementen, die formschlüssig in eine ringförmige Nut unterhalb des Kugelkopfs eingreifen, sind reibschlüssig wirkende Verbindungselemente in den Fällen vorteilhaft einsetzbar, bei denen die ringförmige Nut als Hin- terschnitt nicht oder nicht wirtschaftlich herstellbar ist. Weitere Anforderungen an ein solches Verbindungselement bestehen nicht nur darin, dass eine Trennung von Schlepphebel und Abstützelement durch Transporteinflüsse sicher ausgeschlossen ist, sondern dass der Schlepphebel und das Abstützelement mit Hilfe des Verbindungselements auch während der Montage der Baueinheit in die Brennkraftmaschine dem betriebsgemäßen Zustand entsprechend zueinander ausgerichtet bleiben. Insofern kommt dem Verbindungselement auch die Aufgabe zu, den Schlepphebel gegen Verkippung um seine Längsachse durch geeignete seitliche Abstützung auf dem Abstützelement weitgehend zu sichern, um eine einwandfreie Querausrichtung des Schlepphebels an der zu montierenden Nocken- welle zu gewährleisten. Ein Verkippen des Schlepphebels um seine Längsachse ist nachfolgend als Kippbewegung im Gegensatz zu dessen Schwenkbewegung in Richtung des Gaswechselventils bezeichnet.This would at least lead to a valvetrain malfunction and in the worst case even to a serious engine failure. Compared with connecting elements, which engage positively in an annular groove below the ball head, frictionally acting connecting elements are advantageously used in cases in which the annular groove is not or not economically producible undercut. Other requirements for such a connecting element consist not only in that a separation of rocker arm and support element is reliably excluded by transport influences, but that the rocker arm and the support element aligned with the aid of the connecting element during assembly of the assembly in the internal combustion engine the operating state according to each other stay. In this respect, the connecting element also has the task of largely securing the towing lever against tilting about its longitudinal axis by suitable lateral support on the support element, in order to ensure perfect transverse alignment of the finger lever on the camshaft to be mounted. A tilting of the drag lever about its longitudinal axis is referred to below as a tilting movement in contrast to the pivotal movement in the direction of the gas exchange valve.
Im Stand der Technik sind bereits Verbindungselemente vorgeschlagen, die an- stelle des Formschlusses reibschlüssig mit dem Abstützelement verbunden sind. Aus der als gattungsbildend betrachteten US 6,047,675 A geht ein aus Flachmaterial bestehendes Verbindungselement hervor, welches mit einem im Bereich des sphärischen Endes hinterschnittsfreien Abstützelement reibschlüssig verbunden ist. Dieses Verbindungselement weist auf den zylindrischen Abschnitt unterhalb des sphärischen Endes gerichtete Vorsprünge auf, die das Abstützelement so umklammern, dass eine Kippbewegung des auf dem Abstützelement gelagerten Schlepphebels weitgehend verhindert wird, während dessen Schwenkbewegung in Betätigungsrichtung des Gaswechselventils zugelassen ist.In the prior art, connecting elements have already been proposed that are connected to the supporting element in a frictional engagement instead of the positive connection. US Pat. No. 6,047,675 A, which is regarded as generic, discloses a connecting element consisting of flat material, which is frictionally connected to a support element which is undercut in the area of the spherical end. This connecting element has on the cylindrical portion below the spherical end directed projections which clasp the support member so that a tilting movement of the bearing mounted on the support arm cam lever is largely prevented, while the pivotal movement is allowed in the direction of actuation of the gas exchange valve.
Das in der zitierten Druckschrift vorgeschlagene Verbindungselement weist dennoch einige wesentliche Nachteile auf. So handelt es sich um flach ausgebildete Vorsprünge, die sich lediglich in einer zur Schwenkachse des Schlepphebels parallelen Ebene erstrecken. Daraus folgt einerseits, dass ein die korrekte Queraus-
richtung des Schlepphebels auf dem Abstützelement begünstigender Hebelarm zwischen den Kontaktpunkten der Vorsprünge und dem Drehpunkt des Schlepphebels nachteilig klein ist. Andererseits ist es aufgrund der nicht nur flachen sondern auch kurzen Vorsprünge erforderlich, dass die zur Montage des Verbin- dungselements erforderliche Aufspreizung der Vorsprünge infolge deren begrenzter Materialelastizität weitgehend durch elastische Verformung der Stege aufgebracht wird, von welchen die Vorsprünge ausgehen. Jedoch besteht hierbei das Risiko eines unerwünschten gegenseitigen Verzuges der Stege, beispielsweise in Form einer Aufwellung, Torsion oder Verschränkung. Eine solche Deformation des Verbindungselements kann aufgrund höhenversetzter Vorsprünge ebenfalls zu einer Fehlausrichtung des Schlepphebels führen. In Verbindung mit dem erwähnten kurzen Hebelarm besteht darüber hinaus ein erhöhtes Risiko, dass das Verbindungselement in Kipprichtung des Schlepphebels verrutscht.The proposed in the cited document connecting element still has some significant disadvantages. So it is flat formed projections which extend only in a direction parallel to the pivot axis of the finger lever level. It follows, on the one hand, that the correct crossover direction of the rocker arm on the support element favoring lever arm between the contact points of the projections and the pivot point of the rocker arm is disadvantageously small. On the other hand, due to the not only flat but also short protrusions, it is necessary for the spreading of the protrusions required for mounting the connecting element to be largely applied by elastic deformation of the webs from which the protrusions originate, due to their limited material elasticity. However, there is the risk of undesirable mutual distortion of the webs, for example in the form of a swelling, torsion or entanglement. Such a deformation of the connecting element may also lead to misalignment of the finger lever due to offset in height projections. In connection with the mentioned short lever arm is moreover an increased risk that the connecting element slips in the tilting direction of the finger lever.
Dieser nachteilige Effekt kann sich unter Einbeziehung der Bauteiltoleranzen weiter verschärfen. Die Ursache hierfür ist ebenfalls in den eben, kurz und folglich vergleichsweise steif ausgebildeten Vorsprüngen zu sehen, so dass sowohl eine fertigungsbedingte Abstandsänderung der Vorsprünge zueinander als auch ein schwankender Durchmesser des zylindrischen Abschnitts durch zusätzliche Ver- formung der Stegabschnitte, von denen die Vorsprünge ausgehen, kompensiert werden müssen.This adverse effect can be exacerbated by the inclusion of component tolerances. The cause for this is likewise to be seen in the projections which are flat, short and consequently comparatively stiff, so that both a production-related change in the distance of the projections from one another and a fluctuating diameter of the cylindrical section are caused by additional deformation of the web sections from which the projections originate. must be compensated.
Ein korrekt auf dem Abstützelement ausgerichteter Schlepphebel kann schließlich nicht nur für den Transport und die Montage der Baueinheit sondern auch für ei- nen ausfallsicheren Betrieb in der Brennkraftmaschine von Bedeutung sein. So kann im Falle eines Kontaktverlusts zwischen Schlepphebel und betätigendem Nocken die den Schlepphebel ausrichtende Wirkung des Nockens aufgehoben sein. Ursachen für einen solchen Kontaktverlust können ein unerwünschtes Einsinken der zumeist verwendeten Abstützelemente mit hydraulischem Ventilspiel- ausgleich oder ein Abheben des Schlepphebels vom Nocken infolge einer Überdrehzahl der Brennkraftmaschine sein. In der Phase des Kontaktverlusts würde dann ein „schiefziehendes" Verbindungselement den Schlepphebel in Kipprichtung drängen. Diesbezüglich sind insbesondere Schlepphebel mit sehr schmaler
Nockenkontaktfläche zu beachten. Diese finden Verwendung bei bauraumbe- engten Mehrventilmotoren oder auch bei variablen Ventilsteuerungen, bei denen ein aus mehreren Nocken unterschiedlichen Hubes bestehendes Nockenpaket axial auf seiner Nockenwelle verschiebbar gelagert ist und von dem ein zum Betriebszustand der Brennkraftmaschine passender Nocken in Eingriff mit dem Schlepphebel gebracht wird. Der Schlepphebel ist dann hinsichtlich einer weiteren Kippbewegung oder eines vollständigen Abkippens vom Abstützelement besonders gefährdet, da er sich bei erneutem Kontakt zu seinem Nocken aufgrund der schmalen Nockenkontaktfläche nicht mehr ausreichend am No- cken auszurichten vermag.Finally, a drag lever which is correctly aligned on the support element can be of significance not only for the transport and assembly of the assembly but also for fail-safe operation in the internal combustion engine. Thus, in the case of contact loss between rocker arm and actuating cam, the cam follower aligning effect of the cam be canceled. Causes of such a loss of contact may be an undesirable sinking of the mostly used support elements with hydraulic valve clearance compensation or a lifting of the finger lever from the cam due to an overspeed of the internal combustion engine. In the phase of loss of contact, a "skewed" connecting element would then push the rocker arm in the direction of tilting, in which, in particular, drag levers are very narrow Observe cam contact surface. These are used in space-restricted multi-valve engines or also in variable valve controls, in which a cam of different cams different cam existing cam is mounted axially displaceable on its camshaft and of which a matching the operating condition of the engine cam is brought into engagement with the cam follower. The drag lever is then particularly endangered by the support element with regard to a further tilting movement or a complete tilting, since it can no longer adequately align with the cam on renewed contact with its cam due to the narrow cam contact surface.
Aufgabe der ErfindungObject of the invention
Aufgabe der Erfindung ist es daher, ein Verbindungselement der vorgenannten Art zu schaffen, bei welchem die zitierten Nachteile mit einfachen Mitteln beseitigt sind. Demnach soll gegenüber den im Stand der Technik bekannten Verbindungselementen gewährleistet werden, dass einerseits der Nockenfolger auf dem Abstützelement ausreichend verliersicher gehalten ist und andererseits die betriebsgemäße Querausrichtung des Nockenfolgers auf dem Abstützelement eine erhöh- te Robustheit aufweist. Unter Robustheit ist hier die Stabilität der erforderlichen Querausrichtung des Nockenfolgers unter Einwirkung von Störeinflüssen zu verstehen, zu denen beispielsweise die zuvor genannten Bauteiltoleranzen zählen.The object of the invention is therefore to provide a connecting element of the aforementioned type, in which the cited disadvantages are eliminated by simple means. Accordingly, in relation to the connecting elements known in the prior art, it is to be ensured that, on the one hand, the cam follower on the supporting element is kept sufficiently captive and, on the other hand, the correct lateral alignment of the cam follower on the supporting element has an increased robustness. Robustness here is to be understood as meaning the stability of the required transverse alignment of the cam follower under the influence of disturbing influences, which include, for example, the aforementioned component tolerances.
Zusammenfassung der ErfindungSummary of the invention
Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des Anspruchs 1 , während vorteilhafte Weiterbildungen und Ausgestaltungen den Unteransprüchen entnehmbar sind. Demnach wird die Aufgabe dadurch gelöst, dass die Vorsprünge als von den zentralen Stegen abgewinkelte sich in eine vom Nockenfolger abge- wandte Richtung erstreckende Laschen ausgebildet sind, so dass die Vorsprünge als solche formelastisch sind.The solution to this problem arises from the features of claim 1, while advantageous developments and refinements the dependent claims are removed. Accordingly, the object is achieved in that the projections are designed as tabs extending from the central webs in a direction away from the cam follower extending tabs, so that the projections are as such form-elastic.
Hierdurch sind die genannten Nachteile mit einfachen Mitteln beseitigt. Die als
abgewinkelte Laschen ausgebildeten Vorsprünge umgreifen den zylindrischen Abschnitt an Kontaktpunkten, die vom Drehpunkt des Nockenfolgers vergleichsweise weit beabstandet sind. Der so erzeugte Hebelarm ist ausreichend groß, um die betriebsgemäße Querausrichtung des Nockenfolgers auf dem Abstützelement zu begünstigen und gegen Verrutschen zu stabilisieren. Gleichzeitig wird aufgrund der in sich formelastischen Vorsprünge sichergestellt, dass die für die reibschlüssige Verbindung am zylindrischen Abschnitt erforderliche elastische Verformung des Verbindungselements hauptsächlich durch die Laschen selber und nur unwesentlich durch die Stege, von denen die Laschen ausgehen, aufgebracht wird. Auch dadurch, dass die formelastischen Vorsprünge hervorragend zur Kompensation der genannten Bauteiltoleranzen geeignet sind, wird das Risiko der eingangs erläuterten Deformation der Stege, die zur Fehlausrichtung des Nockenfolgers führen können, minimiert.As a result, the disadvantages mentioned are eliminated by simple means. As Angled tabs formed projections engage around the cylindrical portion at contact points, which are relatively widely spaced from the pivot point of the cam follower. The lever arm thus produced is sufficiently large to promote the operational transverse orientation of the cam follower on the support element and to stabilize against slipping. At the same time it is ensured due to the inherently elastic projections that the necessary for the frictional connection on the cylindrical portion elastic deformation of the connecting element mainly by the tabs themselves and only slightly by the webs from which the tabs go out is applied. The fact that the form-elastic protrusions are outstandingly suitable for compensating the component tolerances mentioned minimizes the risk of the initially described deformation of the webs, which can lead to misalignment of the cam follower.
In einer bevorzugten Ausgestaltung der Erfindung sollen die zentralen Stege zu einem geschlossenen und im wesentlichen ebenen Ringabschnitt gehören, der an einer dem Abstützelement zugewandten ersten Seite eines die kalottenförmige Einformung umgebenden Bodens des Nockenfolgers anliegt. Zur Befestigung des Verbindungselements auf dem Nockenfolger weist der Ringabschnitt abgewinkelte und in Längsrichtung des Nockenfolgers orientierte Haltekrallen auf, die mit Haltenasen auf einer dem Abstützelement abgewandten zweiten Seite des Bodens eingerastet sind. Durch diese Ausgestaltung wird eine steife Anbindung des Verbindungselements am Nockenfolger erzielt. Der ausreichend große Hebelarm wird dann dadurch erzeugt, dass die Laschen den zylindrischen Abschnitt des Abstützelements an Kontaktpunkten umgreifen, deren auf eine Längsachse des Abstützelements projizierter Abstand zum Drehpunkt größer als ein auf die Längsachse projizierter Abstand des ebenen Ringabschnitts zum Drehpunkt ist.In a preferred embodiment of the invention, the central webs are to belong to a closed and substantially planar ring portion which rests against a support element facing the first side of a dome-shaped indentation surrounding bottom of the cam follower. For attachment of the connecting element on the cam follower, the ring portion angled and oriented in the longitudinal direction of the cam follower retaining claws, which are engaged with retaining lugs on a side facing away from the support element of the bottom. By this embodiment, a rigid connection of the connecting element is achieved on the cam follower. The sufficiently large lever arm is then generated in that the tabs engage around the cylindrical portion of the support element at contact points whose projected to a longitudinal axis of the support element distance to the pivot point is greater than a projected on the longitudinal axis distance of the flat ring portion to the fulcrum.
Außerdem soll der Nockenfolger als Schlepphebel ausgebildet sein, der einen generell U-förmigen Querschnitt besitzt und spanlos aus Blechwerkstoff hergestellt ist. Auch als Verbindungselement ist zweckmäßigerweise ein spanlos hergestelltes Umformteil aus federhartem Blechwerkstoff vorzusehen. Ein solches Verbindungselement ist besonders einfach und kostengünstig herstellbar sowie prozess-
sicher auf dem Nockenfolger montierbar. Eine besonders bevorzugte Ausgestaltung der Erfindung ist schließlich durch eine Kombination der im abhängigen Anspruch 5 genannten und zuvor erläuterten Merkmale gegeben.In addition, the cam follower should be designed as a drag lever, which has a generally U-shaped cross section and is made without cutting of sheet metal material. Also, as a connecting element is advantageously provided a non-cutting produced Umformteil of spring-hard sheet metal material. Such a connecting element is particularly simple and inexpensive to produce and process- securely mountable on the cam follower. A particularly preferred embodiment of the invention is finally given by a combination of the mentioned in the dependent claim 5 and previously explained features.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Die Erfindung ist anhand der beiliegenden Zeichnungen, in denen ein Ausfüh- rungsbeispiel dargestellt ist, näher erläutert. Es zeigen:The invention is explained in more detail with reference to the accompanying drawings, in which an exemplary embodiment is shown. Show it:
Figur 1 ein erfindungsgemäßes Verbindungselement in montiertem Zustand eines Ventiltriebs bei längs geschnittenem Nockenfolger1 shows an inventive connecting element in the assembled state of a valve train with longitudinally cut cam follower
Figur 2 das Verbindungselement gemäß Figur 1 in vergrößerter perspektivischer Darstellung.Figure 2 shows the connecting element according to Figure 1 in an enlarged perspective view.
Ausführliche Beschreibung der ZeichnungDetailed description of the drawing
In Figur 1 ist ein Ausschnitt eines Ventiltriebs 1 einer Brennkraftmaschine im montierten Zustand offenbart. Dargestellt ist ein Nockenfolger 2, der auf an sich be- kannte Weise über einen nicht gezeigten Nocken mittels einer mit dem Nockenfolger 2 verbundenen und drehbar gelagerten Rolle 3 in Betätigungsrichtung eines Gaswechselventils 4 angetrieben ist. Selbstverständlich kann anstelle der Rolle 3 auch eine mit dem Nockenfolger 2 starr verbundene Gleitfläche als Nockenkontakt vorgesehen sein. Der Nockenfolger 2 ist in dem Ausführungsbeispiel als Schlepp- hebel 5 ausgebildet, der in Längsrichtung einen generell U-förmigen Querschnitt besitzt und aus Blechwerkstoff in einem spanlosen Umformverfahren kostengünstig hergestellt ist. Ein in der Brennkraftmaschine ruhend gelagertes Abstützelement 6 weist ein sphärisches Ende 7 auf, auf dem der Nockenfolger 2 mittels einer ka- lottenförmigen Einformung 8 in Richtung des Gaswechselventils 4 um einen Dreh- punkt 9 schwenkbeweglich gelagert ist.1 shows a detail of a valve train 1 of an internal combustion engine is disclosed in the assembled state. Shown is a cam follower 2, which is driven in a manner known per se via a cam (not shown) by means of a roller 3 connected to the cam follower 2 and rotatably mounted in the direction of actuation of a gas exchange valve 4. Of course, instead of the roller 3 and a cam follower 2 rigidly connected sliding surface can be provided as a cam contact. The cam follower 2 is formed in the embodiment as a drag lever 5, which has a generally U-shaped cross-section in the longitudinal direction and is made inexpensively from sheet metal in a chipless forming process. A supporting element 6 mounted in a stationary manner in the internal combustion engine has a spherical end 7 on which the cam follower 2 is mounted so as to be pivotable about a pivot point 9 in the direction of the gas exchange valve 4 by means of a slot-shaped indentation 8.
Zur verliersicheren Halterung des Schlepphebels 5 am Abstützelement 6 ist ein Verbindungselement 10 vorgesehen, dass nachfolgend unter Einbeziehung der
Figur 2 näher erläutert ist. Das Verbindungselement 10 besteht als spanlos hergestelltes Umformteil aus federhartem Blechwerkstoff und weist einen geschlossenen Ringabschnitt 11 auf, der an einer dem Abstϋtzelement 6 zugewandten ersten Seite 12 eines die kalottenförmige Einformung 8 umgebenden Bodens 13 des Schlepphebels 5 anliegt. Von dem Ringabschnitt 11 gehen um etwa 90° abgewinkelte und in Längsrichtung des Schlepphebels 5 orientierte Haltekrallen 14, 15 aus, die mit Haltenasen 16 auf einer dem Abstϋtzelement 6 abgewandten zweiten Seite 17 des Bodens 13 eingerastet sind. Das Verbindungselement 10 ist auf diese Weise am Schlepphebel 5 fixiert, wobei an der Haltekralle 14 zusätzliche Win- kel 18 vorgesehen sind, welche eine exakte Längsausrichtung des Verbindungselements 10 gegenüber dem Schlepphebel 5 unterstützen. Der Ringabschnitt 11 umfasst zentrale Stege 19, von denen abgewinkelte und als Laschen 20 ausgebildete Vorsprünge 21 in eine vom Schlepphebel 5 abgewandte Richtung ausgehen.For the captive mounting of the drag lever 5 on the support element 6, a connecting element 10 is provided that subsequently incorporating the Figure 2 is explained in more detail. The connecting element 10 is formed as a non-cutting formed part of spring-hard sheet material and has a closed ring portion 11 which abuts a Abst demtzelement 6 facing first side 12 of a dome-shaped indentation 8 surrounding bottom 13 of the finger lever 5. From the ring portion 11 go by about 90 ° angled and oriented in the longitudinal direction of the drag lever 5 retaining claws 14, 15, which are latched with retaining lugs 16 on a Abstϋtzelement 6 remote from the second side 17 of the bottom 13. The connecting element 10 is fixed in this way on the finger lever 5, wherein on the retaining claw 14 additional angles 18 are provided, which support an exact longitudinal alignment of the connecting element 10 relative to the finger lever 5. The ring portion 11 comprises central webs 19, of which angled and designed as tabs 20 projections 21 emanate in a direction away from the finger lever 5 direction.
Das sphärische Ende 7 geht stufenlos und hinterschnittsfrei in einen zylindrischen Abschnitt 22 über, den die Laschen 20 parallel zu der durch den Drehpunkt 9 verlaufenden Schwenkachse des Schlepphebels 5 umgreifen. Zu diesem Zweck ist im nicht montierten Zustand des Verbindungselements 10 der lichte Abstand der Laschen 20 zueinander kleiner als der Durchmesser des zylindrischen Abschnitts 22. Beim Aufziehen des Verbindungselements 10 über das sphärische Ende 7 auf den zylindrischen Abschnitt 22 verformen sich die Laschen 20 elastisch und verbinden das Abstützelement 6 reibschlüssig mit dem am Schlepphebel 5 fixierten Verbindungselement 10. Hierdurch ist eine aus dem Schlepphebel 5, dem Abstützelement 6 und dem Verbindungselement 10 bestehende Baueinheit 23 gebil- det, die den Schlepphebel 5 im nicht montierten Zustand des Ventiltriebs 1 verliersicher auf dem Abstützelement 6 hält. Darüber hinaus ist in diesem Zustand sichergestellt, dass der Schlepphebel 5 gegenüber dem Abstützelement 6 zumindest verkippungsarm ausgerichtet ist. Eine solche Ausrichtung wird durch das Verbindungselement 10 dadurch begünstigt und beispielsweise gegen Verrut- sehen stabilisiert, dass ein auf die Längsachse des Abstützelements 6 projizierter Hebelarm 24 zwischen Kontaktpunkten 25 der Laschen 20 und dem Drehpunkt 9 des Schlepphebels 5 ausreichend groß ist. Zum Vergleich ist in Figur 1 ein erheblich kleinerer Hebelarm 26, wie er sich bei nicht abgewinkelten Vorsprüngen ge-
maß dem zitierten Stand der Technik ergeben würde, eingezeichnet.The spherical end 7 is stepless and undercut in a cylindrical portion 22, which engage around the tabs 20 parallel to the axis passing through the pivot point 9 pivot axis of the finger lever 5. For this purpose, in the unassembled state of the connecting element 10, the clear distance between the tabs 20 to each other smaller than the diameter of the cylindrical portion 22. When mounting the connecting element 10 via the spherical end 7 on the cylindrical portion 22, the tabs 20 deform elastically and connect the supporting element 6 frictionally engages with the connecting element 10 fixed on the towing lever 5. In this way, a structural unit 23 consisting of the drag lever 5, the supporting element 6 and the connecting element 10 is formed, which captively holds the drag lever 5 in the unassembled state of the valvetrain 1 on the supporting element 6 stops. In addition, it is ensured in this state that the drag lever 5 is aligned with respect to the support member 6 at least tilting. Such an orientation is facilitated by the connecting element 10 and stabilized, for example, against slipping that a projected to the longitudinal axis of the support member 6 lever arm 24 between contact points 25 of the tabs 20 and the pivot point 9 of the finger lever 5 is sufficiently large. For comparison, FIG. 1 shows a considerably smaller lever arm 26, as it is used in non-angled projections. in the cited prior art would, drawn.
Weiterhin geht aus Figur 2 deutlich hervor, dass die Laschen 20 als solche formelastisch sind. Das bedeutet, dass die zum Aufziehen des Verbindungselements 10 auf den zylindrischen Abschnitt 22 des Abstützelements 6 erforderliche elastische Verformung weitestgehend von den Laschen 20 und nur im geringen Maße von den Stegen 19 oder dem Ringabschnitt 11 aufgenommen wird. Folglich ist das Risiko einer Aufwellung, Verschränkung, Torsion oder einer ähnlichen Deformation der Stege 19 oder des Ringabschnitts 11 mit entsprechend am zylindrischen Ab- schnitt 22 höhenversetzt angreifenden Laschen 20 minimiert und eine daraus resultierende Fehlausrichtung des Schlepphebels 5 auf dem Abstützelement 6 weitgehend ausgeschlossen.Furthermore, it is clear from Figure 2 that the tabs 20 are as such form-elastic. This means that the elastic deformation required for mounting the connecting element 10 on the cylindrical portion 22 of the supporting element 6 is largely absorbed by the tabs 20 and only to a small extent by the webs 19 or the annular portion 11. Consequently, the risk of swelling, entanglement, torsion or a similar deformation of the webs 19 or the ring portion 11 is minimized with correspondingly on the cylindrical portion 22 vertically offset attacking tabs 20 and a resulting misalignment of the finger lever 5 on the support member 6 largely excluded.
Die Laschen 20 sind in dem dargestellten Ausführungsbeispiel so gestaltet, dass sie im Anschluss an einen Übergangsradius eben sowie gegenüber den zentralen Stegen um jeweils 90° abgewinkelt sind und folglich parallel verlaufen. Als alternative Ausführungsformen sind dazu auch konisch zulaufende und/oder mehrfach oder vollständig gekrümmte Laschen möglich.
The tabs 20 are designed in the illustrated embodiment so that they are angled just after a transition radius as well as with respect to the central webs by 90 ° and therefore parallel. As alternative embodiments, conically tapering and / or multiple or completely curved tabs are also possible.
OO O O
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Ventiltrieb1 valve train
2 Nockenfolger2 cam followers
3 Rolle3 roll
4 Gaswechselventil4 gas exchange valve
5 Schlepphebel5 rocker arms
6 Abstützelement6 support element
7 sphärisches Ende kalottenförmige Einformung7 spherical end dome-shaped indentation
9 Drehpunkt9 pivot point
10 Verbindungselement10 connecting element
11 Ringabschnitt11 ring section
12 erste Seite12 first page
13 Boden13 floor
14 Haltekralle14 holding claw
15 Haltekralle15 holding claw
16 Haltenase16 retaining nose
17 zweite Seite17 second page
18 Winkel18 angles
19 Steg19 footbridge
20 Lasche20 tab
21 Vorsprung21 lead
22 zylindrischer Abschnitt22 cylindrical section
23 Baueinheit23 unit
24 Hebelarm24 lever arm
25 Kontaktpunkt25 contact point
26 Hebelarm
26 lever arm
Claims
1. Verbindungselement (10) aus Flachmaterial zur verliersicheren Halterung eines hebelartigen Nockenfolgers (2), der zur Betätigung eines Gaswech- selventils (4) einer Brennkraftmaschine dient, an einem Abstützelement1. connecting element (10) made of flat material for the captive mounting of a lever-like cam follower (2) which serves to actuate a gas exchange selventils (4) of an internal combustion engine, on a support element
(6), das ein aus einem zylindrischen Abschnitt (22) stufenlos oder hinter- schnittsfrei übergehendes sphärisches Ende (7) aufweist, auf dem der No- ckenfolger (2) mittels einer kalottenförmigen Einformung (8) in Richtung des Gaswechselventils (4) um einen Drehpunkt (9) schwenkbeweglich ge- lagert ist, wobei das Verbindungselement (10) den zylindrischen Abschnitt(6), which has a spherical end (7) passing continuously or without undercut from a cylindrical section (22), on which the cam follower (2) by means of a dome-shaped indentation (8) in the direction of the gas exchange valve (4) a pivot point (9) is pivotally mounted, wherein the connecting element (10) the cylindrical portion
(22) mit elastisch verformbaren und von zentralen Stegen (19) ausgehenden Vorsprüngen (21 ) parallel zur Schwenkachse des Nockenfolgers (2) derart umgreift, dass das Verbindungselement (10) lediglich reibschlüssig mit dem zylindrischen Abschnitt (22) verbunden ist, dadurch gekenn- zeichnet, dass die Vorsprünge (21 ) als von den zentralen Stegen (19) abgewinkelte und sich in eine vom Nockenfolger (2) abgewandte Richtung erstreckende Laschen (20) ausgebildet sind, so dass die Vorsprünge (21 ) als solche formelastisch sind.(22) with elastically deformable and of central webs (19) outgoing projections (21) parallel to the pivot axis of the cam follower (2) engages around such that the connecting element (10) is only frictionally connected to the cylindrical portion (22), characterized characterized in that the projections (21) as of the central webs (19) angled and extending in a direction away from the cam follower (2) extending tabs (20) are formed, so that the projections (21) are as such form-elastic.
2. Verbindungselement nach Anspruch 1 , dadurch gekennzeichnet, dass die zentralen Stege (19) zu einem geschlossenen und im wesentlichen ebenen Ringabschnitt (11) gehören, der an einer dem Abstützelement (6) zugewandten ersten Seite (12) eines die kalottenförmige Einformung (8) umgebenden Bodens (13) des Nockenfolgers (2) anliegt und in Längsrich- tung des Nockenfolgers (2) orientierte Haltekrallen (14, 15) aufweist, die vom Ringabschnitt (11) abgewinkelt und mit Haltenasen (16) auf einer dem Abstützelement (6) abgewandten zweiten Seite (17) des Bodens (13) eingerastet sind, wobei die Laschen (20) den zylindrischen Abschnitt (22) des Abstützelements (6) an Kontaktpunkten (25) umgreifen, deren auf ei- ne Längsachse des Abstützelements (6) projizierter Abstand (Hebelarm2. Connecting element according to claim 1, characterized in that the central webs (19) belong to a closed and substantially flat annular portion (11) on a said supporting element (6) facing first side (12) of a dome-shaped indentation (8 ) abuts surrounding bottom (13) of the cam follower (2) and in the longitudinal direction of the cam follower (2) oriented retaining claws (14, 15) angled from the ring portion (11) and with retaining lugs (16) on a support element (6 ) facing away from the second side (17) of the bottom (13) are engaged, wherein the tabs (20) engage around the cylindrical portion (22) of the support element (6) at contact points (25) on one ne longitudinal axis of the support element (6) projected distance (lever arm
24) zum Drehpunkt (9) größer als ein auf die Längsachse projizierter Abstand (Hebelarm 26) des Ringabschnitts (11 ) zum Drehpunkt (9) ist. 24) to the pivot point (9) is greater than a projection projected on the longitudinal axis (lever arm 26) of the annular portion (11) to the pivot point (9).
3. Verbindungselement nach Anspruch 1 , dadurch gekennzeichnet, dass der Nockenfolger (2) als Schlepphebel (5) ausgebildet ist, einen generell U-förmigen Querschnitt besitzt und spanlos aus Blechwerkstoff hergestellt ist.3. Connecting element according to claim 1, characterized in that the cam follower (2) is designed as a drag lever (5) has a generally U-shaped cross-section and is made without cutting of sheet metal material.
4. Verbindungselement nach Anspruch 1 , dadurch gekennzeichnet, dass das Verbindungselement (10) als spanlos hergestelltes Umformteil aus federhartem Blechwerkstoff besteht.4. Connecting element according to claim 1, characterized in that the connecting element (10) as a non-cutting produced Umformteil consists of spring-hard sheet metal material.
5. Verbindungselement nach Anspruch 1 , dadurch gekennzeichnet, dass das Verbindungselement (10) gemeinsam mit dem Nockenfolger (2) und dem Abstützelement (6) eine Baueinheit (23) mit folgenden Merkmalen bildet: - der Nockenfolger (2) ist als aus Blechwerkstoff spanlos hergestellter5. Connecting element according to claim 1, characterized in that the connecting element (10) together with the cam follower (2) and the support element (6) forms a structural unit (23) with the following features: - The cam follower (2) is as a sheet metal material without cutting produced
Schlepphebel (5) ausgebildet und besitzt einen generell U-förmigen Querschnitt;Drag lever (5) is formed and has a generally U-shaped cross-section;
- das Verbindungselement (10) besteht als spanlos hergestelltes Umformteil aus federhartem Blechwerkstoff; - die zentralen Stege (19) gehören zu einem geschlossenen und im wesentlichen ebenen Ringabschnitt (11 ), der an einer dem Abstützelement (6) zugewandten ersten Seite (12) eines die kalottenförmige Einformung (8) umgebenden Bodens (13) des Schlepphebels (5) anliegt und in Längsrichtung des Schlepphebels (5) orientierte Haltekrallen (14, 15) aufweist, die vom Ringabschnitt (11) abgewinkelt und mit Haltenasen- The connecting element (10) consists of non-cutting produced Umformteil of spring-hard sheet metal material; - The central webs (19) belong to a closed and substantially planar ring portion (11) on a said supporting element (6) facing the first side (12) of the dome-shaped indentation (8) surrounding the bottom (13) of the finger lever (5 ) and in the longitudinal direction of the finger lever (5) oriented holding claws (14, 15), the angled from the ring portion (11) and with retaining lugs
(16) auf einer dem Abstützelement (6) abgewandten zweiten Seite (17) des Bodens (13) eingerastet sind;(16) on a the support element (6) facing away from the second side (17) of the bottom (13) are engaged;
- die Laschen (20) umgreifen den zylindrischen Abschnitt (22) an Kontaktpunkten (25), deren auf eine Längsachse des Abstützelements (6) projizierter Abstand (Hebelarm 24) zum Drehpunkt (9) größer als ein auf die Längsachse projizierter Abstand (Hebelarm 26) des Ringabschnitts (11) zum Drehpunkt (9) ist. - The tabs (20) engage around the cylindrical portion (22) at contact points (25) whose projected to a longitudinal axis of the support element (6) distance (lever arm 24) to the pivot point (9) is greater than a projected on the longitudinal axis distance (lever arm 26 ) of the ring portion (11) to the pivot point (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005036918A DE102005036918A1 (en) | 2005-08-05 | 2005-08-05 | Connecting element for the captive mounting of a lever-like cam follower |
| PCT/EP2006/007444 WO2007017132A1 (en) | 2005-08-05 | 2006-07-27 | Connection element for the secure fixing of a lever-type cam follower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1913239A1 true EP1913239A1 (en) | 2008-04-23 |
| EP1913239B1 EP1913239B1 (en) | 2014-02-19 |
Family
ID=37055745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06776457.1A Expired - Fee Related EP1913239B1 (en) | 2005-08-05 | 2006-07-27 | Connection element for the secure fixing of a lever-type cam follower |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7721695B2 (en) |
| EP (1) | EP1913239B1 (en) |
| CN (1) | CN101258306B (en) |
| DE (1) | DE102005036918A1 (en) |
| WO (1) | WO2007017132A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| DE102009040608A1 (en) * | 2009-09-08 | 2011-03-10 | Schaeffler Technologies Gmbh & Co. Kg | Assembly for a valve train of an internal combustion engine |
| DE102010013942A1 (en) | 2010-04-06 | 2011-10-06 | Schaeffler Technologies Gmbh & Co. Kg | Lever-like cam follower for actuating gas-exchange valve of internal combustion engine, comprises elongated lever body made of metal sheet material, which has side walls spaced from each other |
| DE102011006694A1 (en) | 2010-04-15 | 2011-10-20 | Schaeffler Technologies Gmbh & Co. Kg | Assembly for a gas exchange valve drive of an internal combustion engine |
| DE102011007451A1 (en) * | 2011-04-15 | 2012-10-18 | Schaeffler Technologies AG & Co. KG | Cam follower of a valve train |
| DE102012221516A1 (en) * | 2012-11-26 | 2014-05-28 | Schaeffler Technologies Gmbh & Co. Kg | Retaining clip for engine components |
| US9091187B2 (en) * | 2013-02-04 | 2015-07-28 | GM Global Technology Operations LLC | Stationary hydraulic lash adjuster and roller finger follower assembly clip, and method thereof |
| US9482120B2 (en) | 2013-03-25 | 2016-11-01 | GT Technologies | Retention device for valve actuating mechanism |
| DE102014201443A1 (en) | 2014-01-28 | 2015-07-30 | Schaeffler Technologies AG & Co. KG | Lever-like cam follower |
| CN103939161B (en) * | 2014-04-16 | 2016-08-03 | 杭州新坐标科技股份有限公司 | For connecting the bulb card of roller rock arm and hydraulic tappet |
| USD797152S1 (en) | 2015-04-06 | 2017-09-12 | Eaton Corporation | Zero lash clip |
| US9863291B2 (en) | 2015-05-14 | 2018-01-09 | GT Technologies | Locator for use in a valvetrain of a cylinder head of an internal combustion engine |
| US10697331B2 (en) | 2018-09-26 | 2020-06-30 | GT Technologies | Valve actuating mechanism having combined bearing and hydraulic lash adjuster retention device |
| EP3969733B1 (en) * | 2019-05-17 | 2024-03-13 | Eaton Intelligent Power Limited | Valvetrain power transfer module with shortened leaf-spring contact |
| WO2023030691A1 (en) * | 2021-09-03 | 2023-03-09 | Eaton Intelligent Power Limited | Roller finger follower with pivot body and outer arm |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19617523C2 (en) | 1996-05-02 | 2001-11-08 | Schaeffler Waelzlager Ohg | Securing for operating lever of valve controls for internal combustion engines |
| DE19640919A1 (en) * | 1996-10-04 | 1998-04-09 | Schaeffler Waelzlager Ohg | Valve rocker used in internal combustion engine |
| DE29707987U1 (en) * | 1997-05-03 | 1997-07-10 | Volkswagen Ag, 38440 Wolfsburg | Securing arrangement for the ball joint bearing of rocker arms, preferably for valve control of internal combustion engines |
| US6047675A (en) * | 1998-11-10 | 2000-04-11 | General Motors Corporation | Retainer clip and valve actuator subassembly |
| US6470842B2 (en) * | 2000-10-12 | 2002-10-29 | Ina Walzlager Schaeffler Ohg | Lever-type cam follower |
| DE10249560A1 (en) * | 2002-10-24 | 2004-05-06 | Ina-Schaeffler Kg | Rocker arm of a valve train of an internal combustion engine |
-
2005
- 2005-08-05 DE DE102005036918A patent/DE102005036918A1/en not_active Withdrawn
-
2006
- 2006-07-27 EP EP06776457.1A patent/EP1913239B1/en not_active Expired - Fee Related
- 2006-07-27 WO PCT/EP2006/007444 patent/WO2007017132A1/en active Application Filing
- 2006-07-27 US US11/997,806 patent/US7721695B2/en not_active Expired - Fee Related
- 2006-07-27 CN CN2006800291316A patent/CN101258306B/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007017132A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1913239B1 (en) | 2014-02-19 |
| US20080196682A1 (en) | 2008-08-21 |
| CN101258306A (en) | 2008-09-03 |
| WO2007017132A1 (en) | 2007-02-15 |
| US7721695B2 (en) | 2010-05-25 |
| CN101258306B (en) | 2010-06-16 |
| DE102005036918A1 (en) | 2007-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1913239B1 (en) | Connection element for the secure fixing of a lever-type cam follower | |
| DE102017101792B4 (en) | Variable valve train of a combustion piston engine | |
| EP1617047B1 (en) | Connecting element for fixation of a lever type cam follower | |
| DE60304621T2 (en) | Rocker arm for two-stage cam operation | |
| WO2006021300A1 (en) | Connection element for the captive mounting of a lever-like cam follower | |
| DE4336360C2 (en) | Rocker arm for operating two valves | |
| DE102017129422A1 (en) | Variable valve train of a combustion piston engine | |
| WO2011003865A1 (en) | Method for producing a lift transfer component | |
| DE102018103961A1 (en) | Variable valve train of a combustion piston engine | |
| DE3500523A1 (en) | Rocker arm spring for the valve actuation mechanism of an internal combustion engine | |
| WO2009098047A1 (en) | Valve lever assembly having a switchable valve actuating mechanism | |
| DE19543657A1 (en) | Trailing or tilting lever e.g. for internal combustion engine valve gear | |
| DE102018110573A1 (en) | Device for actuating displaceable locking means | |
| DE19811658B4 (en) | Pivoting cam follower of a valve train of an internal combustion engine | |
| EP3014080B1 (en) | Spring arrangement for a variable valve drive of an internal combustion engine | |
| EP2156021B1 (en) | Rocker arm of an internal combustion engine | |
| DE102017130277A1 (en) | Switchable cam follower of a valve train | |
| DE102020123950A1 (en) | Rocker arm device and actuator | |
| DE102013203956A1 (en) | Cam follower for a valve train of an internal combustion engine | |
| DE102010033090A1 (en) | cam follower | |
| EP3167168A1 (en) | Mechanically controllable valve drive | |
| DE102008009901A1 (en) | Rocker arm for valve drive of internal combustion engine has lever body with double U-shaped cross-sectional profile in central region and two axially adjacent and oppositely open profile sections | |
| DE102017125144A1 (en) | VALVE ASSEMBLY AND COMBUSTION ENGINE WITH SUCH A VALVE | |
| DE102018112815A1 (en) | Variable valve train of a reciprocating internal combustion engine | |
| DE102018116121A1 (en) | Device for actuating sliding coupling elements |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20080305 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE FR HU IT PL |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): AT DE FR HU IT PL |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
|
| DAX | Request for extension of the european patent (deleted) | ||
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| INTG | Intention to grant announced |
Effective date: 20131011 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT DE FR HU IT PL |
|
| REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 652859 Country of ref document: AT Kind code of ref document: T Effective date: 20140315 |
|
| RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502006013536 Country of ref document: DE Effective date: 20140403 |
|
| REG | Reference to a national code |
Ref country code: AT Ref legal event code: HC Ref document number: 652859 Country of ref document: AT Kind code of ref document: T Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, DE Effective date: 20140416 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502006013536 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140219 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20141120 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502006013536 Country of ref document: DE Effective date: 20141120 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20140219 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R081 Ref document number: 502006013536 Country of ref document: DE Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20150223 Ref country code: DE Ref legal event code: R081 Ref document number: 502006013536 Country of ref document: DE Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE Effective date: 20140319 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 10 |
|
| REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 652859 Country of ref document: AT Kind code of ref document: T Effective date: 20140727 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140727 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 11 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20060727 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 12 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20170727 Year of fee payment: 12 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180731 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20200928 Year of fee payment: 15 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 502006013536 Country of ref document: DE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220201 |
|
| P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230522 |