EP1036256B1 - Levier d'actionnement de soupape - Google Patents

Levier d'actionnement de soupape Download PDF

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Publication number
EP1036256B1
EP1036256B1 EP98965707A EP98965707A EP1036256B1 EP 1036256 B1 EP1036256 B1 EP 1036256B1 EP 98965707 A EP98965707 A EP 98965707A EP 98965707 A EP98965707 A EP 98965707A EP 1036256 B1 EP1036256 B1 EP 1036256B1
Authority
EP
European Patent Office
Prior art keywords
tabs
symmetry plane
longitudinal symmetry
actuating lever
valve actuating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98965707A
Other languages
German (de)
English (en)
Other versions
EP1036256A1 (fr
Inventor
Helmut Engelhardt
Wolfgang Mayer
Johannnes Mayer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
IHO Holding GmbH and Co KG
Original Assignee
Bayerische Motoren Werke AG
INA Waelzlager Schaeffler OHG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG, INA Waelzlager Schaeffler OHG filed Critical Bayerische Motoren Werke AG
Publication of EP1036256A1 publication Critical patent/EP1036256A1/fr
Application granted granted Critical
Publication of EP1036256B1 publication Critical patent/EP1036256B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • 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

Definitions

  • the present invention relates to a valve operating lever for transmitting the Movement of a cam arranged on a camshaft onto a gas exchange valve an internal combustion engine.
  • a roller rocker arm of the type in question is by DE 195 43 657 A1 became known.
  • the known valve actuation lever has a U-shaped base body on, at one end a pan-like depression is provided with which the lever supports in the installed state via a support element on the cylinder head. At the other end there is the valve contact area through which the gas exchange valve the internal combustion engine depending on the position of the cam of the camshaft is operated.
  • the cam is in a cam contact area with the valve actuation lever Contact, one in this cam contact area with a roller rocker arm roller is rotatably mounted by rolling elements.
  • the base body of the valve actuation lever is formed without cutting and points to the End at which the valve contact area is provided, inwardly bent tabs which form lateral boundary surfaces.
  • the present invention is therefore based on the object of a valve actuation lever and in particular a roller rocker arm and a method for the same To provide production at which the moment of inertia the lever around the axis of rotation is reduced. Another aspect of this task is it to design the valve actuation lever so that the rigidity against the State of the art increased and low manufacturing costs can be achieved.
  • the valve actuation lever according to the invention has a substantially non-cutting shaped elongated body, preferably with a U-shaped profile.
  • the basic body is essentially symmetrical to itself in its longitudinal direction extending longitudinal plane of symmetry.
  • tabs are arranged in the valve contact area, each one have the side surface facing the longitudinal plane of symmetry.
  • the tabs are on molded onto an end edge of this base body and towards the valve contact area bent.
  • At least one of these tabs points away from this plane of longitudinal symmetry away extending transition area, in which the distance between them Side surfaces enlarged and at least one parallel area in which this Side surfaces run essentially parallel to this longitudinal plane of symmetry.
  • the two tabs are at a clear distance at the end edge of the body arranged, which is less than the clear distance of the side surfaces in the parallel area, this distance in each case in a direction perpendicular to the longitudinal plane of symmetry is determined.
  • the design according to the invention has a number of essential advantages.
  • the distance between the tabs on the end edge of the elongated body is constructive Size, which is the width of the elongated body in the valve contact area certainly. By reducing this distance, the width of the elongated one becomes simultaneously Base body at least in the valve contact area and thereby also its Weight decreased. Because the valve contact area is radial from the axis of rotation of the valve operating lever is spaced, this results in a significant reduction the moment of inertia around the axis of rotation of the lever. With that, the forces required to operate the lever are reduced at the same speed, and it becomes the permissible for the valve train with regard to the actuation forces Speed limit raised.
  • the bending lengths of the lever are also transverse to its longitudinal direction reduced, which can increase the rigidity.
  • the tabs are on the base body the bending process molded in such a way that they are parallel to the plane of longitudinal symmetry extend, d. H. run straight. The bending then takes place in such a way that one or both tabs to form the transition area from the longitudinal plane of symmetry be bent away. At the end of the transition area are the tabs then bent in such a way that the inner plane facing the plane of symmetry Side surface of the tab runs parallel to this.
  • this parallel area can then be used connect yet another constriction area in which one or both tabs are facing the longitudinal plane of symmetry again.
  • the tabs are such punched that the transition area and the parallel area already with the deformed tabs are present.
  • the tabs then only have to be bent through 180 ° and then in the bent state, without further bending, the desired contour in the valve contact area.
  • the first and the second embodiment can also be combined with one another.
  • the flaps are stamped into an initial shape followed by a 180 ° bend and an additional bend brought to the longitudinal symmetry plane or away from it into the final shape.
  • Tabs it is also possible to treat the tabs differently, so that e.g. a Tab is only subjected to a bend of approximately 180 °, while the other tab both this bend and a further bend, in particular to the plane of longitudinal symmetry there or away from it.
  • the initial form of Tabs be the same, e.g. the shape of an elongated cuboid parallel to the plane of longitudinal symmetry corresponding longitudinal edges or different from each other his.
  • Fig. 1 shows a first embodiment of the roller finger follower according to the invention.
  • the roller rocker arm has a base body designated 1 overall, which extends essentially symmetrically along a longitudinal plane of symmetry 2.
  • the term plane of symmetry is not to be understood here in a purely geometrical sense, it simply means that essential areas of the valve actuation lever are designed symmetrically to this plane of symmetry.
  • the plane of symmetry 2 1 runs perpendicular to the plane of the drawing and forms in the 2 the sectional plane.
  • the elongated body is, as can be seen from the illustration in FIG. 3, in designed essentially U-shaped and has a symmetrical to the plane of symmetry 2 extending recess 4 in which a roller 7 mounted on rolling elements 6th is arranged. When installed, the roller 7 stands with the cam of a camshaft in contact.
  • this recess 10 for receiving a Support element (not shown) is provided. When installed this element in turn is supported within the cylinder head (not shown) from.
  • This recess 10 is known in the prior art and therefore need not be discussed further here.
  • valve contact area 20 On the left side of the base body in the illustration according to FIG. 1 there is a valve contact area 20 provided.
  • the valve contact area has a surface 21, which is designed to be slightly convex in the exemplary embodiment, but can also do other things Have curvature shapes or just be designed.
  • the valve contact area is through two, the longitudinal symmetry plane 2 facing limited lateral surfaces 23, 24, which are part of the tabs 25, 26.
  • the tabs 25, 26 are formed on an end edge 30 of the elongate base body 1, the end edge 30 being substantially perpendicular to the plane of symmetry 2.
  • the distance between the tabs 25 and 26 corresponds to this end edge of the base body the length a in Fig. 5 between the arrows 31 and 32 or, in other words, the Tabs 25 and 26 are on the end edge 30 of a web 30a, which has the width c (see Fig. 5) between the arrows 33 and 34, integrally formed.
  • both tabs 25, 26 have a transition region 35, 36 on, in which the tabs away from the plane of symmetry 2 extend.
  • a parallel area 37 adjoins this transition area 35, 36 38 in which both tabs run parallel to the plane of symmetry 2.
  • At the tab 26 is followed by a constriction area 40, in which the tab rests on the Plane of symmetry 2 runs.
  • transition area is therefore defined by the fact that here the angular Alignment of the tab or the side surfaces with respect to the longitudinal plane of symmetry changes.
  • the distance between the two tabs corresponds to the distance b, as shown between arrows 42, 43.
  • This distance b is larger than the distance a.
  • the difference between the two routes essentially corresponds to the width savings of the base body compared to the prior art discussed above.
  • the two tabs 25, 26 are located, in particular the representation according to Figure 2 shows, flush, d. H. without space on which curved surface of the valve contact area 20.
  • the tabs can also in this embodiment be designed in the next embodiment so that between the tabs and a gap is provided on the surface of the valve contact area, the tabs are then shaped so that their end area rests on the valve contact area.
  • the end region in the illustration according to FIG. B. at the tab 26 of the Constriction area 40, with respect to the valve contact area, can be fixed in the first alternative, d. H. with flush-fitting tabs, as well as with the second alternative, d. H. in the case of tabs that are partially at a distance from the valve contact area have at the end of an additional connection, preferably by a spot weld is made.
  • the roller rocker arm shown in the embodiment is a total of one Metal sheet punched out and then preferably cold-formed to the in Fig. 1 to 4 to achieve the final design shown.
  • the tabs 25 and 26 are at Punching as an essentially straight extension of the base body 1 educated. Then, as shown in Fig. 6, they are down (in the illustration seen the drawing) reshaped, the distance between the tabs continues corresponds to the distance a. Then the tabs from the plane of symmetry 2 bent away to form the transition region 35, 36.
  • This bending process is carried out so that the tabs are initially at a first bending angle are bent outwards so that the outwards from the plane of symmetry 2nd forms the first part of the transition region 35, 36 and that adjoins it the tabs bent back in the direction of the plane of symmetry 2 be that the further part of the tabs runs parallel to the line of symmetry 2. Only one or both ends of the tabs, as indicated by 40 in Fig. 1, is again with an inward bending angle, formed on the plane of symmetry 2.
  • this design makes it possible run the valve operating lever with a small width. This becomes significant of material saved, thereby reducing the moment of inertia around the axis of rotation reduced and, with otherwise the same dimensions, the rigidity is increased.
  • this essentially corresponds to that shown in FIG. 8 End product, namely the roller finger follower, essentially as shown Fig. 1. Corresponding reference numerals are therefore also used there.
  • the tabs are here during a punching process immediately formed so that the desired transition area is already during the punching process and not, as in the exemplary embodiment according to FIGS. 1 to 6, results in bending.
  • the tab 51 is on the substantially perpendicular to the plane of symmetry 2 End edge 30 of the base body 1 is formed.
  • the tab 51 has a first Area in which the tab is designated 53 even in the undeformed state forms an acute angle to this end edge 30, whereby one of the longitudinal symmetry plane 2 pointing transition area 54 forms.
  • the transition area 54 is followed by a parallel region 55, which is designed parallel to the plane of longitudinal symmetry and there is an area 56 in which the side surface is at an acute angle to the longitudinal plane of symmetry is directed towards.
  • a parallel region 57 is initially provided, which is parallel to the Longitudinal plane of symmetry 2 runs, to which the transition region 58 then adjoins, in which the tab extends outward from the longitudinal plane of symmetry 2.
  • a further parallel area 59 which is parallel to the longitudinal plane of symmetry 2 extends and which forms the side surface 60.

Landscapes

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

Claims (15)

  1. Levier d'actionnement de soupape pour la transmission du mouvement d'une came agencée sur un arbre à cames vers une soupape de changement de gaz dans un moteur à combustion interne, comprenant :
    un corps de base allongé (1) mis en forme sensiblement sans enlèvement de matière, conçu de façon sensiblement symétrique par rapport à un plan de symétrie longitudinal (2) s'étendant dans sa direction longitudinale,
    une zone de contact de soupape (20) ménagée à une première extrémité de ce corps de base,
    deux pattes (25, 26 ; 51, 52) agencées dans la zone de contact de soupape des deux côtés de ce plan de symétrie longitudinal, qui présentent chacune une surface latérale (23, 24 ; 60, 61) orientée vers le plan de symétrie longitudinal, lesdites pattes étant formées sur ce corps de base et recourbées en direction de cette zone de contact de soupape,
    caractérisé en ce que :
    lesdites pattes sont agencées au niveau d'une arête terminale (30) du corps de base allongé avec une distance libre (a) inférieure à la distance libre (b) des surfaces latérales dans la zone de contact de soupape, lesdites distances étant respectivement mesurées dans une direction perpendiculaire au plan de symétrie longitudinal (2), et
    l'une au moins desdites pattes comporte au moins une région de transition (35, 36 ; 54, 58) qui s'étend en éloignement de ce plan de symétrie longitudinal, dans laquelle la distance entre les surfaces latérales augmente, ainsi qu'au moins une région parallèle (37, 38 ; 55, 59) dans laquelle lesdites surfaces latérales s'étendent sensiblement parallèlement au plan de symétrie longitudinal (2).
  2. Levier d'actionnement de soupape selon la revendication 1, caractérisé en ce que ladite région de transition (35, 36) est réalisée par une déformation plastique.
  3. Levier d'actionnement de soupape selon la revendication 1, caractérisé en ce que ladite région de transition (54, 58) est réalisée par une opération avec enlèvement de matière.
  4. Levier d'actionnement de soupape selon l'une au moins des revendications précédentes, caractérisé en ce que l'une au moins desdites pattes comporte une région en rétrécissement (40, 56) qui se raccorde à la région parallèle, dans laquelle ladite patte est réalisée en convergeant vers le plan de symétrie longitudinal (2).
  5. Levier d'actionnement de soupape selon l'une au moins des revendications précédentes, caractérisé en ce que ledit corps de base est réalisé sensiblement en forme de U dans un plan de coupe situé perpendiculairement au plan de symétrie longitudinal.
  6. Levier d'actionnement de soupape selon l'une au moins des revendications précédentes, caractérisé en ce que lesdites pattes sont réalisées avec une section transversale rectangulaire et de préférence carrée.
  7. Levier d'actionnement de soupape selon l'une au moins des revendications précédentes, caractérisé en ce que la surface (21) qui forme la zone de contact de soupape (20) s'étend sous forme courbe, et en ce que les pattes sont incurvées de manière à reposer sur cette surface en suivant la courbure.
  8. Levier d'actionnement de soupape selon l'une au moins des revendications 1 à 6, caractérisé en ce que la surface (21) qui forme la zone de contact de soupape (20) s'étend sous forme courbe, et en ce que lesdites pattes sont incurvées de telle manière qu'elles se trouvent à distance de cette surface dans une zone partielle, et qu'elles reposent sur cette surface uniquement au niveau de leur zone terminale.
  9. Levier d'actionnement de soupape selon l'une ou l'autre des revendications 7 et 8, caractérisé en ce que ladite courbure est au moins partiellement une courbure convexe.
  10. Levier d'actionnement de soupape selon l'une au moins des revendications précédentes, caractérisé en ce que ledit levier de soupape est réalisé sous forme de levier traíné.
  11. Levier d'actionnement de soupape selon la revendication 10, caractérisé en ce que ledit levier d'actionnement de soupape est réalisé sous forme de levier traíné à galet.
  12. Levier d'actionnement de soupape selon la revendication 11, caractérisée en ce que ledit levier traíné à galet comprend un galet (7) monté en rotation par l'intermédiaire d'éléments de roulement (6).
  13. Levier d'actionnement de soupape selon la revendication 1, caractérisé en ce que ledit corps de base (1) présente en coupe transversale une formé en U, et en ce que lesdites pattes sont formées au niveau d'une arête terminale (30) dudit corps de base, et cela sur une barrette (30a) d'une largeur (c) inférieure à celle du corps de base (1) en forme de U.
  14. Procédé pour la réalisation d'un levier d'actionnement de soupape, et en particulier d'un levier d'actionnement de soupape selon l'une des revendications 1 à 13, comprenant les opérations suivantes:
    on estampe un corps de base allongé (1) conçu sensiblement symétrique par rapport à un plan de symétrie longitudinal (2) s'étendant dans sa direction longitudinale, avec deux pattes (25, 26) agencées au niveau d'une arête terminale des deux côtés de ce plan de symétrie longitudinal (2) et comportant chacune une surface latérale (23, 24) tournée vers le plan de symétrie longitudinal (2), lesdites pattes (25, 26) étant formées sur ledit corps de base (1) et s'étendant parallèlement audit plan de symétrie longitudinal (2),
    on recourbe lesdites pattes (25, 26) sur un angle d'environ 180°,
    on recourbe l'une au moins desdites pattes (25, 26) afin de former une région de transition (35, 37) qui s'étend en éloignement du plan de symétrie longitudinal (2) et dans laquelle la distance entre lesdites surfaces latérales (23, 24) augmente, ainsi qu'au moins une région parallèle (37, 38) dans laquelle lesdites surfaces latérales (23, 24) s'étendent sensiblement parallèlement audit plan de symétrie longitudinal (2).
  15. Procédé pour la réalisation d'un levier d'actionnement de soupape et en particulier d'un levier d'actionnement de soupape selon l'une des revendications 3 à 13, comprenant les opérations suivantes :
    on estampe un corps de base allongé (1), conçu sensiblement symétrique par rapport à un plan de symétrie longitudinal (2) qui s'étend dans sa direction longitudinale et comprenant deux pattes (51, 52) agencées des deux côtés de ce plan de symétrie longitudinal (2) et comportant chacune une surface latérale (60, 61) tournée vers le plan de symétrie longitudinal (2), lesdites pattes (51, 52) étant formées sur ledit corps de base, et l'une au moins des pattes (51, 52) comporte au moins une région de transition (54, 58) qui s'étend en éloignement du plan de symétrie longitudinal (2) et dans laquelle la distance entre lesdites surfaces latérales (60, 61) augmente, ainsi qu'au moins une région parallèle (55, 59) dans laquelle lesdites surfaces latérales (60, 61) s'étendent sensiblement parallèlement audit plan de symétrie longitudinal (2),
    on recourbe lesdites pattes sur un angle d'environ 180°.
EP98965707A 1997-12-02 1998-11-27 Levier d'actionnement de soupape Expired - Lifetime EP1036256B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19753424A DE19753424A1 (de) 1997-12-02 1997-12-02 Ventilbetätigungshebel
DE19753424 1997-12-02
PCT/EP1998/007674 WO1999028600A1 (fr) 1997-12-02 1998-11-27 Levier d'actionnement de soupape

Publications (2)

Publication Number Publication Date
EP1036256A1 EP1036256A1 (fr) 2000-09-20
EP1036256B1 true EP1036256B1 (fr) 2002-04-03

Family

ID=7850497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98965707A Expired - Lifetime EP1036256B1 (fr) 1997-12-02 1998-11-27 Levier d'actionnement de soupape

Country Status (5)

Country Link
US (1) US6273044B1 (fr)
EP (1) EP1036256B1 (fr)
DE (2) DE19753424A1 (fr)
ES (1) ES2174539T3 (fr)
WO (1) WO1999028600A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6470842B2 (en) * 2000-10-12 2002-10-29 Ina Walzlager Schaeffler Ohg Lever-type cam follower
ES2228241B1 (es) * 2003-02-20 2006-06-01 Tratasa 2000, S.L. Procedimiento para fabricar un filtro para agua y otros fluidos.
US20100018276A1 (en) * 2008-07-28 2010-01-28 Edelmayer Thomas C Sheet metal rocker arm with integrally formed cross member
US20110253088A1 (en) * 2010-04-15 2011-10-20 Schaeffler Technologies Gmbh & Co. Kg Structural unit for a gas exchange valve train of an internal combustion engine
DE102011076727A1 (de) 2011-05-30 2012-12-06 Schaeffler Technologies AG & Co. KG Schlepphebel eines Ventiltriebs
JP6769691B2 (ja) * 2014-12-26 2020-10-14 株式会社オティックス ロッカーアームの製造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5016582A (en) * 1990-10-12 1991-05-21 Henley Manufacturing Holding Company, Inc. Rocker arm
DE69309346T2 (de) 1992-01-07 1997-07-10 Mitsubishi Motors Corp Kipphebel mit rolle und dessen herstellungsverfahren
DE19543657C2 (de) 1995-11-23 1998-07-02 Schaeffler Waelzlager Ohg Spanlos geformter Schlepp- oder Kipphebel
DE19617668C2 (de) 1995-11-23 2003-11-20 Ina Schaeffler Kg Spanlos geformter Schlepp- oder Kipphebel
DE19617523C2 (de) * 1996-05-02 2001-11-08 Schaeffler Waelzlager Ohg Sicherung für Betätigungshebel von Ventilsteuerungen für Brennkraftmaschinen

Also Published As

Publication number Publication date
WO1999028600A1 (fr) 1999-06-10
ES2174539T3 (es) 2002-11-01
EP1036256A1 (fr) 2000-09-20
DE19753424A1 (de) 1999-06-10
DE59803669D1 (de) 2002-05-08
US6273044B1 (en) 2001-08-14

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