EP2929152A1 - Intermediate lever - Google Patents
Intermediate leverInfo
- Publication number
- EP2929152A1 EP2929152A1 EP13805747.6A EP13805747A EP2929152A1 EP 2929152 A1 EP2929152 A1 EP 2929152A1 EP 13805747 A EP13805747 A EP 13805747A EP 2929152 A1 EP2929152 A1 EP 2929152A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- intermediate lever
- cam
- face
- side plates
- crossbar
- 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.)
- Withdrawn
Links
Classifications
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- 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
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- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
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- 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
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- 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
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
- F01L2001/467—Lost motion springs
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- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
- F01L2013/0068—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
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- 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
Definitions
- the invention relates to intermediate lever for a variable-stroke valve drive of an internal combustion engine, with two upright and spaced side plates a) at a first end face on the one hand a support surface for a slide track and on the other hand, a stop surface for a cam, the b) in a longitudinal center section a mating surface for have a lift cams and the c) are connected at a further front end via a cross-piece connected transom, the outside of the variable transmission of a stroke of the lift cam on a tap of a follower member, wherein a lying in the pivoting direction of the intermediate lever end of the crossbar as an attachment for an end a cam return spring acting upon the intermediate lever is provided, and two tabs for the lateral guidance of the cam return spring protrude from this end face.
- Such an intermediate lever is shown in FIG. 2 of DE 10201 1003898 A1.
- the disadvantage is that the tabs are connected integrally to guide the cam return spring at the other end. This area presents itself as problematic in mass production because of its comparatively complicated training. Just a precise and clean training lying between the integrally connected tabs Endstirn to rest a leg of the cam return spring may not process reliable and too expensive. Possibly. this area must be elaborately reworked. It is also clear that, depending on the manufacturing process, a formation of particularly spaced from the end face tabs is complicated. In addition, it is noted that the partial sliding tap (support or abutment surface) at the first end unnecessarily increases the valve train friction. The task is to create an intermediate lever without the mentioned disadvantages.
- a "clean" guide region for the cam return spring on the intermediate lever is to be created by simple means.
- This object is achieved in that the tabs are part of a separately connected with the intermediate lever bow-like component, which is the one end face, to represent a direct investment of Cam return spring on the material of the intermediate lever, not swept over.
- a lateral guidance of the cam return spring is shown on the intermediate lever without complex manufacturing process.
- the tools for the production of preferably made of thin-walled steel sheet punching and bending technology illustrated intermediate lever are easier. It is to be expected with less tool wear or rejects. Possibly. can be maintained for different intermediate lever a uniform bracket-like component.
- the proposed intermediate lever can u. a. be used in a fully variable valve train for throttle-free load control, as it is installed by the Bavarian Motor Works under the name "Valvetronic".
- the intermediate lever can also be machined or cast or sintered or the like.
- the intermediate lever according to the invention can also be perforated or provided with other, window-like recesses for further weight savings in the region of the side plates.
- the two extensions listed according to claim at the other end of the intermediate lever it is conceivable and provided that only one or no extension is present at this front end, so that the bottom for variable stroke transmission may possibly be only the lower end of the intermediate lever.
- the stirrup-like component with transverse strut which mainly arrives in this invention and whose tabs now implement the lateral guidance of the cam return spring (lost-motion spring), can be produced, for example, from sheet metal in a simple stamping and bending process. Possibly. However, is also a solid material training cast or the like. Conceivable and intended. Also, depending on a separate tab may be attached directly to an outer side of the respective side plate of the intermediate lever, these tabs need not be connected to each other via the aforementioned cross member. You can in this case to the side plate u. a. welded, clipped or the like. Be.
- the bracket-like component saves the system in this area.
- a leg of the cam return spring on the material of the intermediate lever is of a transverse end of the crossbar of the intermediate lever in the component in one piece hook-like, outwardly arched approach.
- an involute profile or a profile that is at least similar to it can be present.
- the hook-like approach can also be present as a separately joined to the intermediate lever component, so that the main body of the intermediate lever is even easier to produce.
- the support or abutment surface of the intermediate lever at the first front end or its vicinity may be present as at least one roller or sliding surface. The same applies to the cam counterface.
- the side plates are connected to each other at the first end face via a stiffening bracket, wherein a plurality of brackets are conceivable.
- the bracket can be one piece from the intermediate lever.
- it is also conceivable as a separate component. Possibly. extends from each side plate, a strap piece, which strap pieces are connected together in the region of their then facing each other ends.
- FIG. 1 shows a three-dimensional view of an intermediate lever
- Fig. 2 is a detail view of the bow-like component
- FIG. 3 shows a detailed view of the intermediate lever in the region of its further front end.
- Figure 1 discloses an intermediate lever 1 for a variable-stroke valve drive of an internal combustion engine. This is available as a sheet metal component. He has two The spaced side plates 2. These summarize at a first end face 3 designed as a double role supporting surface 4 for a slide track.
- the double rollers include a trained as a roller, central contact surface 5 for a cam. Support and contact surface 4, 5 extend on an axis 24 connecting the side plates 2 to the first end 3.
- a longitudinal center section 6 of the intermediate lever 1 has a positioned between its side plates 2 and designed as a roller mating surface 7 for a here attacking from the right, not shown lifting cams.
- the mating surface 7 in turn sits on an axis 23rd
- the side plates 2 are connected to each other via an integrally connected crossbar 9.
- An outer side 10 of the crossbar 9 is used for variable transmission of a stroke of the lifting cam to a tap of a drag lever as a follower, wherein the region shown on the left side of the outside as Nullhub- and the right side shown portion of the outside as a lifting section.
- each side plate 2 merges at the further front end 8 into an extension 15, 16 which projects in each case in the lever pivoting direction and which is connected via the transverse bar 9 to its lower end 14.
- extension 15, 16 projects in each case in the lever pivoting direction and which is connected via the transverse bar 9 to its lower end 14.
- the extension 15 has a left end end 1 1 here. This serves as an abutment for an end of the intermediate lever 1 acting on the cam return spring and is formed on an outer surface 22 of a hook-like projection 18 which protrudes from a transverse end 17 of the crossbar 9 in one piece.
- a separate, bracket-like component 13 is attached to the abovementioned end face 1 1, which component is shown as a detail in FIG.
- the component 13 has a transverse strut 19, protrude from the two tabs 12.
- the cross member 19 is firmly seated between an inner surface 20 of the projection 18 and free ends 21 of the extension 15 of the side plates 2 (s. a. FIG. 3).
- the tabs 12 serve for a lateral guidance of a leg of the cam return spring, ie they enclose the leg (see, for example, DE 102 35 402 A1, FIG. 1).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to an intermediate lever (1) for a variable stroke valve train of an internal combustion engine, having two upright lateral plates (2) spaced apart from one another which a) at a first end face (3) on the one hand have a support surface (4) for a slotted guide track and on the other hand a run-on surface (5) for a cam disc, which b) in a longitudinal middle section (6) have a counter-running surface (7) for a lifting cam and which c) at a further end face (8) are connected via a one-piece integrally formed crossbar (9), the outer face (10) of which serves for variable transmission of a stroke of the lifting cam to a tap of a follower member, wherein an end face (11) of the crossbar (9) lying in the pivoting direction of the intermediate lever (1) is provided as abutment for one end of a cam restoring spring acting on the intermediate lever (1), wherein two lugs (12) for lateral guidance of the cam restoring spring protrude from said end face (11), which lugs (12) are part of a shackle-like component (13) joined separately to the intermediate lever (1), wherein the component (13) does not pass over the one end face (11) in order to provide a direct attachment of the cam restoring spring at the material of the intermediate lever (1).
Description
Zwischenhebel intermediate lever
Die Erfindung betrifft Zwischenhebel für einen hubvariablen Ventiltrieb einer Brennkraftmaschine, mit zwei aufrechten sowie zueinander beabstandeten Seitenplatten, die a) an einem ersten Stirnende einerseits eine Stützfläche für eine Kulissenbahn sowie andererseits eine Anlauffläche für eine Kurvenscheibe haben, die b) in einem Längsmittenabschnitt eine Gegenlauffläche für einen Hubnocken besitzen und die c) an einem weiteren Stirnende über einen einteilig angebundenen Querbalken verbunden sind, dessen Außenseite zur variablen Übertragung eines Hubes des Hubnockens auf einen Abgriff eines Folgegliedes dient, wobei eine in Verschwenkrichtung des Zwischenhebels liegende Endstirn des Querbalkens als Anlage für ein Ende einer den Zwischenhebel beaufschlagenden Nockenrückstellfeder vorgesehen ist und wobei von dieser Endstirn zwei Laschen zur lateralen Führung der Nockenrückstellfeder abstehen. Ein derartiger Zwischenhebel geht aus Figur 2 der DE 10201 1003898 A1 hervor. Nachteilig ist, dass dessen Laschen zur Führung der Nockenrückstellfeder an dem weiteren Stirnende einteilig angebunden sind. Dieser Bereich stellt sich aufgrund seiner vergleichsweise komplizierten Ausbildung als problematisch in der Großserienfertigung dar. Gerade eine genaue und saubere Ausbildung der zwischen den einteilig angebundenen Laschen liegenden Endstirn zur Anlage eines Schenkels der Nockenrückstellfeder ist unter Umständen hierbei nicht prozesssicher und zu aufwändig. Ggf. muss dieser Bereich aufwändig nachgearbeitet werden. Auch ist klar, dass, abhängig vom Fertigungsprozess, eine Ausbildung von besonders hoch von der Endstirn beabstandeten Laschen kompliziert ist. Außerdem wird festgestellt, dass der teilweise Gleitabgriff (Stütz- oder Anlauffläche) am ersten Stirnende unnötig die Ventiltriebsreibung erhöht.
Aufgabe ist es, einen Zwischenhebel ohne die aufgezeigten Nachteile zu kreieren. Insbesondere soll mit einfachen Mitteln ein„sauberer" Führungsbereich für die Nockenrückstellfeder am Zwischenhebel geschaffen werden. Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass die Laschen Bestandteil eines separat mit dem Zwischenhebel gefügten bügelähnlichen Bauteils sind, welches die eine Endstirn, zur Darstellung einer unmittelbaren Anlage der Nockenrückstellfeder am Material des Zwischenhebels, nicht überstreicht. The invention relates to intermediate lever for a variable-stroke valve drive of an internal combustion engine, with two upright and spaced side plates a) at a first end face on the one hand a support surface for a slide track and on the other hand, a stop surface for a cam, the b) in a longitudinal center section a mating surface for have a lift cams and the c) are connected at a further front end via a cross-piece connected transom, the outside of the variable transmission of a stroke of the lift cam on a tap of a follower member, wherein a lying in the pivoting direction of the intermediate lever end of the crossbar as an attachment for an end a cam return spring acting upon the intermediate lever is provided, and two tabs for the lateral guidance of the cam return spring protrude from this end face. Such an intermediate lever is shown in FIG. 2 of DE 10201 1003898 A1. The disadvantage is that the tabs are connected integrally to guide the cam return spring at the other end. This area presents itself as problematic in mass production because of its comparatively complicated training. Just a precise and clean training lying between the integrally connected tabs Endstirn to rest a leg of the cam return spring may not process reliable and too expensive. Possibly. this area must be elaborately reworked. It is also clear that, depending on the manufacturing process, a formation of particularly spaced from the end face tabs is complicated. In addition, it is noted that the partial sliding tap (support or abutment surface) at the first end unnecessarily increases the valve train friction. The task is to create an intermediate lever without the mentioned disadvantages. In particular, a "clean" guide region for the cam return spring on the intermediate lever is to be created by simple means.This object is achieved in that the tabs are part of a separately connected with the intermediate lever bow-like component, which is the one end face, to represent a direct investment of Cam return spring on the material of the intermediate lever, not swept over.
Somit wird eine laterale Führung der Nockenrückstellfeder am Zwischenhebel ohne aufwändigen Herstellvorgang dargestellt. Die Werkzeuge zur Fertigung des vorzugsweise aus dünnwandigem Stahlblech stanz-biegetechnisch dargestellten Zwischenhebels fallen einfacher aus. Es ist mit weniger Werkzeugver- schleiß bzw. Ausschuss zu rechnen. Ggf. kann für unterschiedliche Zwischenhebel ein einheitliches bügelähnliches Bauteil vorgehalten werden. Thus, a lateral guidance of the cam return spring is shown on the intermediate lever without complex manufacturing process. The tools for the production of preferably made of thin-walled steel sheet punching and bending technology illustrated intermediate lever are easier. It is to be expected with less tool wear or rejects. Possibly. can be maintained for different intermediate lever a uniform bracket-like component.
Es liegt auf der Hand, dass es aufgrund des separaten Bauteils nunmehr deutlich einfacher ist, vergleichsweise lange oder eng zusammen liegende Laschen am Bauteil darzustellen. It is obvious that it is now much easier due to the separate component to represent comparatively long or close together tabs on the component.
Der vorgeschlagene Zwischenhebel kann u. a. in einem vollvariablen Ventiltrieb zur drosselfreien Laststeuerung eingesetzt werden, so wie er von den Bayerischen Motorenwerken unter der Bezeichnung„Valvetronic" verbaut wird. The proposed intermediate lever can u. a. be used in a fully variable valve train for throttle-free load control, as it is installed by the Bavarian Motor Works under the name "Valvetronic".
Der Zwischenhebel kann neben dessen bevorzugter Blechausbildung auch spanend oder durch Gießen / Sintern o. dgl. dargestellt sein. In addition to its preferred sheet formation, the intermediate lever can also be machined or cast or sintered or the like.
Der erfindungsgemäße Zwischenhebel kann zur weiteren Gewichtsersparnis im Bereich dessen Seitenplatten auch gelocht oder mit anderweitigen, fensterartigen Aussparungen versehen sein. Durch geschickt angebrachte Sicken bzw. erhabene Bereiche erhält er trotz dessen dünnwandiger Ausbildung eine gute Steifigkeit.
Anstelle der anspruchsgemäß aufgeführten zwei Verlängerungen am weiteren Stirnende des Zwischenhebels ist es denkbar und vorgesehen, dass lediglich nur eine oder keine Verlängerung an diesem Stirnende vorliegt, so dass die Unterseite zur variablen Hubübertragung ggf. auch lediglich die untere Stirn des Zwischenhebels sein kann. The intermediate lever according to the invention can also be perforated or provided with other, window-like recesses for further weight savings in the region of the side plates. By skillfully attached beads or raised areas he receives despite its thin-walled training a good stiffness. Instead of the two extensions listed according to claim at the other end of the intermediate lever, it is conceivable and provided that only one or no extension is present at this front end, so that the bottom for variable stroke transmission may possibly be only the lower end of the intermediate lever.
Das bügelähnliche Bauteil mit Querstrebe, auf welches es in dieser Erfindung hauptsächlich ankommt und über dessen Laschen nunmehr die seitliche Füh- rung der Nockenrückstellfeder (Lost-Motion-Feder) realisiert ist, lässt sich bspw. in einem einfachen Stanz-Biegvorgang aus Blech herstellen. Ggf. ist jedoch auch eine Vollmaterialausbildung aus Guss o. dgl. denkbar und vorgesehen. Auch kann je eine separate Lasche direkt an einer Außenseite der jeweiligen Seitenplatte des Zwischenhebels befestigt sein, wobei diese Laschen hierbei nicht über die vorgenannte Querstrebe miteinander verbunden sein müssen. Sie können in diesem Fall an die Seitenplatte u. a. angeschweißt, angeklipst oder dgl. sein. The stirrup-like component with transverse strut, which mainly arrives in this invention and whose tabs now implement the lateral guidance of the cam return spring (lost-motion spring), can be produced, for example, from sheet metal in a simple stamping and bending process. Possibly. However, is also a solid material training cast or the like. Conceivable and intended. Also, depending on a separate tab may be attached directly to an outer side of the respective side plate of the intermediate lever, these tabs need not be connected to each other via the aforementioned cross member. You can in this case to the side plate u. a. welded, clipped or the like. Be.
Nach der Erfindung bleibt, so wie vorhergehend genannt, der eigentliche Anlagebereich der Nockenrückstellfeder am Zwischenhebel erhalten. Das bügelähnliche Bauteil spart in diesem Bereich die Anlage aus. Es ist jedoch alternativ auch denkbar und vorgesehen, über einen Querabschnitt des Bauteils die Anlage separat zu schaffen. According to the invention remains, as mentioned above, the actual contact area of the cam return spring obtained on the intermediate lever. The bracket-like component saves the system in this area. However, it is alternatively conceivable and provided to provide the system separately via a transverse section of the component.
Für einen reibungsarmen Kontakt eines Schenkels der Nockenrückstellfeder am Material des Zwischenhebels steht von einem Querende des Querbalkens des Zwischenhebels bei dem Bauteil einteilig ein hakenartiger, nach außen gewölbter Ansatz ab. Im Kontaktbereich kann ein Evolventenprofil oder ein diesem zumindest ähnliches Profil vorliegen. Ggf. kann der hakenartige Ansatz auch als separat mit dem Zwischenhebel gefügtes Bauteil vorliegen, so dass der Grundkörper des Zwischenhebels noch einfacher herzustellen ist.
Die Stütz- oder Anlauffläche des Zwischenhebels am ersten Stirnende oder dessen Nähe kann als wenigstens eine Rolle oder Gleitfläche vorliegen. Gleiches gilt für die Nockengegenlauffläche. Bei Letztgenannter kann im Falle ei- ner Gleitfläche diese deckelartig nockenzugewandte Stirnen der Seitenplatten überbrücken. Bei einem Rollenkontakt für die Stütz-, Anlauf- o. Nockengegenlauffläche läuft die jeweilige Rolle über eine Wälz- oder Gleitlagerung auf einer die Seitenplatten überbrückenden Achse. Zweckmäßige Maßnahmen einer Befestigung des bügelähnlichen Bauteils am Zwischenhebel sind Gegenstand weiterer Unteransprüche. So ist es vorgeschlagen, die Querstrebe des Bauteils fest zwischen einer Innenfläche des hakenartigen Ansatzes und freien Enden der einen Verlängerung der Seitenplatten anzuordnen. For a low-friction contact of a leg of the cam return spring on the material of the intermediate lever is of a transverse end of the crossbar of the intermediate lever in the component in one piece hook-like, outwardly arched approach. In the contact region, an involute profile or a profile that is at least similar to it can be present. Possibly. The hook-like approach can also be present as a separately joined to the intermediate lever component, so that the main body of the intermediate lever is even easier to produce. The support or abutment surface of the intermediate lever at the first front end or its vicinity may be present as at least one roller or sliding surface. The same applies to the cam counterface. In the latter case, in the case of a sliding surface, these cover-like projections of the side plates facing towards the top can bridge over. In the case of a roller contact for the support, run-on or counter-cam surface, the respective roller runs on a rolling or sliding bearing on an axle bridging the side plates. Appropriate measures of attachment of the bow-like component on the intermediate lever are the subject of further subclaims. Thus, it is proposed to arrange the transverse strut of the component firmly between an inner surface of the hook-like projection and free ends of an extension of the side plates.
Gemäß einem weiteren Unteranspruch sind die Seitenplatten an dem ersten Stirnende über einen versteifenden Bügel miteinander verbunden, wobei auch mehrere Bügel denkbar sind. Der Bügel kann einteilig vom Zwischenhebel ausgehen. Er ist jedoch auch als separates Bauteil denkbar. Ggf. erstreckt sich von jeder Seitenplatte ein Bügelstück, welche Bügelstücken im Bereich ihrer dann aufeinander zu weisenden Enden miteinander verbunden sind. According to a further dependent claim, the side plates are connected to each other at the first end face via a stiffening bracket, wherein a plurality of brackets are conceivable. The bracket can be one piece from the intermediate lever. However, it is also conceivable as a separate component. Possibly. extends from each side plate, a strap piece, which strap pieces are connected together in the region of their then facing each other ends.
Die Erfindung wird anhand der Zeichnung erläutert. Es zeigen: · Fig. 1 eine räumliche Ansicht eines Zwischenhebels; The invention will be explained with reference to the drawing. 1 shows a three-dimensional view of an intermediate lever;
• Fig. 2 eine Detailansicht des bügelähnlichen Bauteils und • Fig. 2 is a detail view of the bow-like component and
• Fig. 3 eine Detailansicht des Zwischenhebels im Bereich dessen weite- ren Stirnendes. 3 shows a detailed view of the intermediate lever in the region of its further front end.
Figur 1 offenbart einen Zwischenhebel 1 für einen hubvariablen Ventiltrieb einer Brennkraftmaschine. Dieser liegt als Blechbauteil vor. Er hat zwei zueinan-
der beabstandete Seitenplatten 2. Diese fassen an einem ersten Stirnende 3 eine als Doppelrolle ausgebildete Stützfläche 4 für eine Kulissenbahn ein. Die Doppelrollen schließen eine als Rolle ausgebildete, mittige Anlauffläche 5 für eine Kurvenscheibe ein. Stütz- und Anlauffläche 4, 5 verlaufen auf einer die Seitenplatten 2 an dem ersten Stirnende 3 verbindenden Achse 24. Figure 1 discloses an intermediate lever 1 for a variable-stroke valve drive of an internal combustion engine. This is available as a sheet metal component. He has two The spaced side plates 2. These summarize at a first end face 3 designed as a double role supporting surface 4 for a slide track. The double rollers include a trained as a roller, central contact surface 5 for a cam. Support and contact surface 4, 5 extend on an axis 24 connecting the side plates 2 to the first end 3.
In einem Längsmittenabschnitt 6 hat der Zwischenhebel 1 eine zwischen seinen Seitenplatten 2 positionierte sowie als Rolle ausgebildete Gegenlauffläche 7 für einen hier von rechts angreifenden, nicht dargestellten Hubnocken. Die Gegenlauffläche 7 sitzt wiederum auf einer Achse 23. In a longitudinal center section 6 of the intermediate lever 1 has a positioned between its side plates 2 and designed as a roller mating surface 7 for a here attacking from the right, not shown lifting cams. The mating surface 7 in turn sits on an axis 23rd
An einem weiteren Stirnende 8 sind die Seitenplatten 2 über einen einteilig angebundenen Querbalken 9 miteinander verbunden. Eine Außenseite 10 des Querbalkens 9 dient zur variablen Übertragung eines Hubes des Hubnockens auf einen Abgriff eines Schlepphebels als Folgeglied, wobei der hier links eingezeichnete Bereich der Außenseite als Nullhub- und der rechts dargestellte Bereich der Außenseite als Hubabschnitt vorliegen. At a further front end 8, the side plates 2 are connected to each other via an integrally connected crossbar 9. An outer side 10 of the crossbar 9 is used for variable transmission of a stroke of the lifting cam to a tap of a drag lever as a follower, wherein the region shown on the left side of the outside as Nullhub- and the right side shown portion of the outside as a lifting section.
Zu erkennen ist außerdem, dass jede Seitenplatte 2 an dem weiteren Stirnende 8 in eine in Hebelverschwenkrichtung jeweils abstehende, über den Querbalken 9 an ihrer Unterstirn 14 verbundene Verlängerung 15, 16 übergeht. In Seitenansicht auf den Zwischenhebel 1 ist somit ein T-ähnliches Profil gebildet. It can also be seen that each side plate 2 merges at the further front end 8 into an extension 15, 16 which projects in each case in the lever pivoting direction and which is connected via the transverse bar 9 to its lower end 14. In side view of the intermediate lever 1 thus a T-like profile is formed.
Die Verlängerung 15 hat eine hier links liegende Endstirn 1 1 . Diese dient als Anlage für ein Ende einer den Zwischenhebel 1 beaufschlagenden Nockenrückstellfeder und ist an einer Außenfläche 22 eines hakenartigen Ansatzes 18 gebildet, welcher von einem Querende 17 des Querbalkens 9 einteilig abragt. The extension 15 has a left end end 1 1 here. This serves as an abutment for an end of the intermediate lever 1 acting on the cam return spring and is formed on an outer surface 22 of a hook-like projection 18 which protrudes from a transverse end 17 of the crossbar 9 in one piece.
Hervorzuheben ist, dass an der vorgenannten Endstirn 1 1 ein separates, bü- gelähnliches Bauteil 13 befestigt ist, welches Bauteil in Figur 2 als Einzelheit gezeichnet ist. Das Bauteil 13 hat eine Querstrebe 19, von der zwei Laschen 12 abstehen. Die Querstrebe 19 sitzt fest zwischen einer Innenfläche 20 des Ansatzes 18 und freien Enden 21 der Verlängerung 15 der Seitenplatten 2 (s.
a. Figur 3). Die Laschen 12 dienen einer lateralen Führung eines Schenkels der Nockenrückstellfeder, d. h. sie schließen den Schenkel ein (siehe hierzu bspw. DE 102 35 402 A1 , Fig. 1 ).
It should be emphasized that a separate, bracket-like component 13 is attached to the abovementioned end face 1 1, which component is shown as a detail in FIG. The component 13 has a transverse strut 19, protrude from the two tabs 12. The cross member 19 is firmly seated between an inner surface 20 of the projection 18 and free ends 21 of the extension 15 of the side plates 2 (s. a. FIG. 3). The tabs 12 serve for a lateral guidance of a leg of the cam return spring, ie they enclose the leg (see, for example, DE 102 35 402 A1, FIG. 1).
Liste der Bezugszahlen ) ZwischenhebelList of reference numbers) Intermediate lever
) Seitenplatte) Side plate
) Stirnende) Front end
) Stützfläche) Support surface
) Anlauffläche) Contact surface
) Längsmittenabschnitt) Longitudinal center section
) Gegenlauffläche) Mating surface
) Stirnende) Front end
) Querbalken) Crossbeams
0) Außenseite0) outside
1 ) Endstirn1) endface
2) Laschen2) tabs
3) Bauteil3) component
4) Unterstim4) substim
5) Verlängerung5) extension
6) Verlängerung6) extension
7) Querende7) Transverse end
8) Ansatz8) approach
9) Querstrebe9) Crossbar
0) lnnenfläche0) inside surface
1 ) Ende1) end
2) Außenfläche2) outer surface
3) Achse3) axis
4) Achse4) axis
5) Querbügel
5) Crossbar
Claims
Patentansprüche claims
Zwischenhebel (1 ) für einen hubvariablen Ventiltrieb einer Brennkraft- maschine, mit zwei aufrechten sowie zueinander beabstandeten Seitenplatten (2), die a) an einem ersten Stirnende (3) einerseits eine Stützfläche (4) für eine Kulissenbahn sowie andererseits eine Anlauffläche (5) für eine Kurvenscheibe haben, die b) in einem Längsmittenabschnitt (6) eine Gegenlauffläche (7) für einen Hubnocken besitzen und die c) an einem weiteren Stirnende (8) über einen einteilig angebundenen Querbalken (9) verbunden sind, dessen Außenseite (10) zur variablen Übertragung eines Hubes des Hubnockens auf einen Abgriff eines Folgegliedes dient, wobei eine in Verschwenkrichtung des Zwischenhebels (1 ) liegende Endstirn (1 1 ) des Querbalkens (9) als Anlage für ein Ende einer den Zwischenhebel (1 ) beaufschlagenden Nockenrückstellfeder vorgesehen ist und wobei von dieser Endstirn (1 1 ) zwei Laschen (12) zur lateralen Führung der Nockenrückstellfeder abstehen, dadurch gekennzeichnet, dass die Laschen (12) Bestandteil eines separat mit dem Zwischenhebel (1 ) gefügten bügelähnlichen Bauteils (13) sind, welches die eine Endstirn (1 1 ), zur Darstellung einer unmittelbaren Anlage der Nockenrückstellfeder am Material des Zwischenhebels (1 ), nicht überstreicht. Intermediate lever (1) for a variable-stroke valve drive of an internal combustion engine, having two upright side plates (2) spaced apart from each other, which a) at a first front end (3) on the one hand a support surface (4) for a slide track and on the other hand a contact surface (5) for a cam disc which b) have a mating surface (7) for a lifting cam in a longitudinal center section (6) and the c) are connected at a further front end (8) via an integrally connected transverse bar (9) whose outer side (10) for variable transmission of a stroke of the lifting cam on a tap of a follower member, wherein in the pivoting direction of the intermediate lever (1) lying end face (1 1) of the crossbar (9) is provided as an abutment for one end of the intermediate lever (1) acting on cam return spring and wherein from this end face (1 1) two tabs (12) protrude for lateral guidance of the cam return spring, characterized in that s the tabs (12) are part of a separately with the intermediate lever (1) joined bow-like member (13), which one Endstirn (1 1), for representing a direct contact of the cam return spring on the material of the intermediate lever (1), not swept.
Zwischenhebel nach Anspruch 1 , dadurch gekennzeichnet, dass jede Seitenplatte (2) an dem weiteren Stirnende (8) des Zwischenhebels (1 ) in eine in Hebelverschwenkrichtung beidseitig abstehende, über den Querbalken (9) an ihrer Unterstirn (14) verbundene Verlängerung (15, 16) übergeht, so dass in Seitenansicht auf den Zwischenhebel (1 ) ein T- ähnliches Profil gebildet ist und wobei eine der Verlängerungen (15, 16) die eine Endstirn (1 1 ) mit dem bügelähnlichen Bauteil (13) hat.
Intermediate lever according to claim 1, characterized in that each side plate (2) at the further front end (8) of the intermediate lever (1) in a Hebelverschwenkrichtung on both sides projecting, on the crossbar (9) at its lower end (14) connected extension (15, 16), so that a T-like profile is formed in side view of the intermediate lever (1) and wherein one of the extensions (15, 16) having an end face (1 1) with the bow-like member (13).
3. Zwischenhebel nach Anspruch 2, dadurch gekennzeichnet, dass von einem Querende (17) des Querbalkens (9) bei dem bügelähnlichen Bauteil (13) ein hakenartiger Ansatz (18) einteilig wegragt, dessen Außenfläche (22) die Endstirn (1 1 ) für die Anlage der Nockenrückstellfeder darstellt, wobei das bügelähnliche Bauteil (13) über seine dessen zwei3. intermediate lever according to claim 2, characterized in that of a transverse end (17) of the crossbar (9) in the bow-like member (13) a hook-like projection (18) protrudes in one piece, the outer surface (22) the end face (1 1) for represents the system of the cam return spring, wherein the bracket-like member (13) via its two
Laschen (12) verbindende Querstrebe (19) zwischen eine Innenfläche (20) des Ansatzes (18) und freien Enden (21 ) der einen Verlängerung (15, 16) der Seitenplatten (2) fest sitzt. Lugs (12) connecting cross strut (19) between an inner surface (20) of the projection (18) and free ends (21) of the one extension (15, 16) of the side plates (2) is firmly seated.
Zwischenhebel nach Anspruch 3, dadurch gekennzeichnet, dass die Außenfläche (22) des hakenartigen Ansatzes (18) einen ausgewölbten Verlauf hat. Intermediate lever according to claim 3, characterized in that the outer surface (22) of the hook-like projection (18) has a curved course.
Zwischenhebel nach Anspruch 1 , dadurch gekennzeichnet, dass die Gegenlauffläche (7) für den Hubnocken im Längsmittenabschnitt (6) des Zwischenhebels (1 ) als wälz- oder gleitgelagerte Rolle vorliegt, welche auf einer die Seitenplatten (2) verbindenden Achse (23) verläuft oder dass die Gegenlauffläche (7) als eine die Seitenplatten (2) überbrückende Gleitfläche dargestellt ist. Intermediate lever according to claim 1, characterized in that the mating surface (7) for the lifting cam in the longitudinal center section (6) of the intermediate lever (1) is present as a roller or roller bearing roller, which on one of the side plates (2) connecting axis (23) runs or in that the mating surface (7) is shown as a sliding surface bridging the side plates (2).
Zwischenhebel nach Anspruch 1 , dadurch gekennzeichnet, dass die Stütz- als auch die Anlauffläche (4, 5) wälz- oder gleitgelagerte Rollen sind, welche auf einer die Seitenplatten (2) an dem ersten Stirnende (3) verbindenden Achse (24) verlaufen, wobei zumindest eines der Elemente Stützfläche / Anlauffläche (4, 5) innerhalb der Seitenplatten (2) auf der Achse (24) positioniert ist. Intermediate lever according to claim 1, characterized in that the support as well as the run-on surface (4, 5) are roller-bearing or roller-bearing rollers which run on an axis (24) connecting the side plates (2) to the first front end (3), wherein at least one of the support surface / run-on surface (4, 5) is positioned within the side plates (2) on the axle (24).
Zwischenhebel nach Anspruch 1 , dadurch gekennzeichnet, dass die Seitenplatten (2) an dem ersten Stirnende (3) über einen Querbügel (25) miteinander verbunden sind. Intermediate lever according to claim 1, characterized in that the side plates (2) at the first front end (3) via a cross bar (25) are interconnected.
8. Zwischenhebel nach Anspruch 1 , dadurch gekennzeichnet, dass der Zwischenhebel (1 ) ein stanz-biegetechnisch hergestelltes Blechteil ist.
8. intermediate lever according to claim 1, characterized in that the intermediate lever (1) is a punch-bent sheet metal part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012222374.6A DE102012222374A1 (en) | 2012-12-06 | 2012-12-06 | intermediate lever |
| PCT/DE2013/200210 WO2014086346A1 (en) | 2012-12-06 | 2013-10-10 | Intermediate lever |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2929152A1 true EP2929152A1 (en) | 2015-10-14 |
Family
ID=49765748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13805747.6A Withdrawn EP2929152A1 (en) | 2012-12-06 | 2013-10-10 | Intermediate lever |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2929152A1 (en) |
| CN (1) | CN104854317A (en) |
| DE (1) | DE102012222374A1 (en) |
| WO (1) | WO2014086346A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015101723A1 (en) * | 2015-02-06 | 2016-08-11 | Franz-Holger Woitowitz | Device for mounting a retaining clip on a valve drive element |
| DE102016220399A1 (en) | 2016-10-18 | 2017-09-07 | Schaeffler Technologies AG & Co. KG | Intermediate lever of a variable valve train |
| DE102016220397A1 (en) | 2016-10-18 | 2017-08-10 | Schaeffler Technologies AG & Co. KG | Intermediate lever of a variable valve train |
| DE102016220396A1 (en) | 2016-10-18 | 2017-08-10 | Schaeffler Technologies AG & Co. KG | Intermediate lever of a variable valve train |
| DE102016220394B3 (en) * | 2016-10-18 | 2017-12-28 | Schaeffler Technologies AG & Co. KG | Intermediate lever of a variable valve train |
| DE102016220401A1 (en) | 2016-10-18 | 2017-09-07 | Schaeffler Technologies AG & Co. KG | Intermediate lever of a variable valve train |
| DE102016223088A1 (en) | 2016-11-23 | 2018-05-24 | Schaeffler Technologies AG & Co. KG | Intermediate lever of a variable valve train |
| DE102022125608A1 (en) | 2022-10-05 | 2024-04-11 | Schaeffler Technologies AG & Co. KG | Intermediate lever |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1925772A1 (en) * | 1969-05-21 | 1970-11-26 | Ford Werke Ag | Rocker and rocker arm guide for combustion engines |
| US5657726A (en) * | 1996-01-16 | 1997-08-19 | Ford Global Technologies, Inc. | Rocker arm assembly for an internal combustion engine |
| DE19730201A1 (en) * | 1997-07-15 | 1999-01-21 | Schaeffler Waelzlager Ohg | Operating lever for valve gear of internal combustion engine |
| DE10235402A1 (en) | 2002-08-02 | 2004-02-12 | Bayerische Motoren Werke Ag | Swivel lever for a variable stroke valve train |
| DE10260557A1 (en) * | 2002-12-21 | 2004-07-01 | Ina-Schaeffler Kg | Intermediate lever for a variable valve train of an internal combustion engine |
| JP2007170261A (en) * | 2005-12-21 | 2007-07-05 | Otics Corp | Rocker arm |
| DE102006018512A1 (en) * | 2006-04-21 | 2007-10-25 | Schaeffler Kg | Roller element for a pivotable machine part |
| DE102010009399A1 (en) * | 2010-02-26 | 2011-09-01 | Schaeffler Technologies Gmbh & Co. Kg | Operating lever for stroke-variable gas exchange valve gear of internal-combustion engine, has lever housing, which is formed with two side panels and base, which is connected with side panels |
| DE102011003898B4 (en) | 2011-02-10 | 2021-09-09 | Schaeffler Technologies AG & Co. KG | Intermediate lever |
-
2012
- 2012-12-06 DE DE102012222374.6A patent/DE102012222374A1/en not_active Withdrawn
-
2013
- 2013-10-10 EP EP13805747.6A patent/EP2929152A1/en not_active Withdrawn
- 2013-10-10 WO PCT/DE2013/200210 patent/WO2014086346A1/en active Application Filing
- 2013-10-10 CN CN201380063576.6A patent/CN104854317A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014086346A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104854317A (en) | 2015-08-19 |
| WO2014086346A1 (en) | 2014-06-12 |
| DE102012222374A1 (en) | 2014-06-12 |
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