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WO2015169301A1 - Ensemble culbuteur pour commande de soupapes d'un moteur à combustion interne et procédé de montage d'un ensemble culbuteur - Google Patents

Ensemble culbuteur pour commande de soupapes d'un moteur à combustion interne et procédé de montage d'un ensemble culbuteur Download PDF

Info

Publication number
WO2015169301A1
WO2015169301A1 PCT/DE2015/200145 DE2015200145W WO2015169301A1 WO 2015169301 A1 WO2015169301 A1 WO 2015169301A1 DE 2015200145 W DE2015200145 W DE 2015200145W WO 2015169301 A1 WO2015169301 A1 WO 2015169301A1
Authority
WO
WIPO (PCT)
Prior art keywords
rocker arm
sleeve
wall sections
receiving openings
side wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE2015/200145
Other languages
German (de)
English (en)
Inventor
Andreas GRÖTSCH
Joachim Seitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of WO2015169301A1 publication Critical patent/WO2015169301A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre 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
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • Rocker arm assembly for a valve train of an internal combustion engine and method for mounting a rocker arm assembly
  • the invention relates to a rocker arm assembly for a valve train of an internal combustion engine and a method for mounting a rocker arm assembly according to the closer defined in the preamble of claim 1 and 10 respectively type.
  • DE 10 2013 218 644 and DE 10 2012 213 662 deal with the design of rocker arms for a valve train of an internal combustion engine.
  • DE 10 2013 218 644 describes a so-called wall-mounted rocker arm, which is pivotally mounted directly on a rocker arm axis via receiving openings on its side wall sections.
  • the wall thickness of the side wall portions limits the size of the contact surface, so that this configuration requires a sufficiently large wall thickness, but increases the overall weight, inertia and the axial space requirement of the rocker arm.
  • the invention is therefore based on the object to provide a rocker arm assembly and a method of the aforementioned type, which allow easy and inexpensive storage of a rocker arm on a rocker shaft.
  • a rocker arm assembly for a valve train of an internal combustion engine with a rocker arm, wherein for the pivotable mounting of the rocker arm on a rocker arm axis in a central region between two Hebelend- areas on opposite side wall portions of the rocker arm aligned receiving openings are provided and a sleeve is arranged non-positively connected at their axial end portions in the receiving openings.
  • the sleeve has tab-shaped cut wall sections, which engage in a form-fitting manner in a bent manner in corresponding recesses on the inner diameter of the receiving openings. In this way, the sleeve is positively and positively fixed in the axial direction and in the circumferential direction of the receiving openings of the rocker arm easy.
  • the sleeve allows a large contact surface for supporting the tilting lever on the rocker shaft, whereby the surface pressures are reduced at the contact points.
  • the side wall sections of the rocker arm can be clamped together with the sleeve in a force-fitting manner in the receiving openings, whereby the rigidity of the rocker arm is increased.
  • the cut-out wall sections of the sleeve are arranged slightly outstanding with their free ends on the outer sides of the receiving openings and lie for the axial fixation of the sleeve on the outer sides of the side wall sections form fit.
  • the slotted wall sections can be arranged slightly protruding with their free ends on the inner sides of the receiving openings and positively applied to the axial fixing of the sleeve on the inner sides of the side wall portions.
  • the tab-shaped wall sections are preferably cut out in each case at two cut edges extending from the respective front end of the sleeve and extending in the axial direction.
  • the wall sections for example by punching, are particularly easy to produce.
  • a particularly easy to manufacture embodiment is achieved when the cut wall portions of the sleeve have a rectangular shape and the recesses on the inner diameter of the receiving openings in the transverse direction of the lever have a rectangular cross-sectional profile.
  • the slotted wall sections are arranged on the sleeve axially aligned with each other.
  • the recesses on the inner diameter of the receiving openings on the side wall sections each extend continuously in the transverse direction of the lever. As a result, they are particularly easy to produce, in particular by punching.
  • the sleeve is preferably made in sheet metal by stamping and deep drawing.
  • the wall thickness of the sleeve is preferably in a range of 1 mm to 1, 5 mm.
  • the rocker arm assembly according to the invention is particularly simple and inexpensive to produce in sheet metal. It is particularly advantageous for SOHC (Single Overhead Camshaft) single cylinder engines with two valves in the motorcycle field.
  • SOHC Single Overhead Camshaft
  • rocker arm arrangement By means of the rocker arm arrangement according to the invention, it is possible to easily store a rocker arm which has been produced inexpensively from thin-walled sheet metal with a particularly low weight in a lightweight manner on a rocker arm axis.
  • the rocker arm is in this case preferably produced by punching and bending.
  • at least the side wall portions of the rocker arm are designed with a wall thickness which is smaller than 3 mm.
  • the object of the invention is also achieved by a method for mounting a rocker arm assembly for a valve train of an internal combustion engine.
  • a sleeve for pivotally supporting a rocker arm on a rocker arm axis, a sleeve is force-fitted or inserted at its axial end areas into aligned receiving openings on parallel side wall sections of the rocker arm.
  • wall sections cut in advance in the form of tabs are respectively bent over at their end regions in such a way that they engage in a form-fitting manner respectively in corresponding recesses on the inner diameter of the receiving openings.
  • the method is preferably used for mounting a rocker arm assembly described above.
  • FIG. 1 shows a sectional top view of a rocker arm arrangement according to the invention
  • FIG. 2 is a plan view of the rocker arm assembly
  • FIG. 3 shows a side view of the rocker arm arrangement
  • FIG. 4 shows a cross section of the rocker arm arrangement
  • Figure 5 is a perspective view of a sleeve according to the invention
  • Figure 6 is a side view of a rocker arm of the rocker arm assembly.
  • Figures 1 to 4 show an example of a rocker arm assembly according to the invention for a valve train of an internal combustion engine with a rocker arm.
  • a rocker arm assembly for pivotally mounting the rocker arm on a rocker arm axis, not shown, in a central region between two Hebelend Schemeen on opposite side wall sections 1, 2 of the rocker arm receiving openings 3, 4 are formed.
  • a sleeve is provided which engages at its axial end portions in the receiving openings 3, 4 and is positively connected thereto.
  • the sleeve is hollow cylindrical, for example, as a straight piece of pipe executed. It extends continuously between the side wall sections 1, 2 and is at its axial end portions in the receiving openings 3, 4 pressed ( Figures 1 and 4).
  • the side wall sections 1, 2 are clamped together via the sleeve.
  • the rocker arm axis can be accommodated pivotable.
  • the rocker arm can be stored on the receiving openings 3, 4 via the sleeve on the Kipphebelachse.
  • the sleeve and the rocker arm shaft are in direct sliding contact.
  • the sleeve may have an oil passage opening. Through the sleeve, the bearing surfaces are increased for storage on the rocker shaft and reduces the surface pressures at the contact surfaces to the rocker shaft.
  • the sleeve protrudes slightly at its axial ends from the receiving openings 3, 4 on the mutually remote outer sides of the side wall sections 1, 2 out ( Figures 1, 2 and 4).
  • the sleeve has at its axial end portions in a rectangular shape tab-shaped cut wall sections 5, 6, which are bent radially outwards such that they respectively in corresponding recesses 7, 8 on the inner diameter of the receiving openings 3, 4th engage positively (Figure 1).
  • the cut-out wall sections 5, 6 are arranged on the sleeve axially aligned with each other ( Figures 1 and 4).
  • the wall sections 5, 6 of the sleeve are in each case cut out in the form of tabs on two cutting edges 9, 10 or slots extending in an axial direction from their respective axial end (FIG. 4).
  • the cut-out on the sleeve wall portions 5, 6 form on both sides of the cutting edges 9, 10 in the circumferential direction plane contact surfaces which abut against corresponding planar contact surfaces of the insides of the recesses 7, 8 ( Figure 1). These have a rectangular profile in the lever transverse direction ( Figure 3).
  • the sleeve is fixed on its cut wall portions 5, 6 on both sides positively in the circumferential direction in the receiving openings 3, 4 and secured in this manner against rotation.
  • the rocker arm is formed on a cam-side lever end region with a roller bearing on a pin cam roller 15 for tapping a Nockenhubterrorism of a camshaft, not shown ( Figures 1, 2, 3 and 4).
  • At least one gas exchange valve of the internal combustion engine can be actuated by transmitting the cam lifting movement to a valve contact section 16 at a valve-side lever end region.
  • the valve contact portion 16 is threaded for a not shown Ventilassiinstellschraub.
  • the receiving openings 3, 4 are arranged on parallel side wall sections 1, 2, which are connected to one another at the top side of the rocker arm by a transverse web 17.
  • Cross bar 15 and side wall sections 1, 2 form a U-shaped cross-sectional profile ( Figure 4), wherein the rocker arm facing away from the top underside with the open U side of its cross-sectional profile, not shown to be operated gas exchange valve of the internal combustion engine.
  • the rocker arm is slightly cranked.
  • In a transition region to the valve-side lever end region of the rocker arm extends slightly parallel with side wall sections 1, 2 in the transverse direction of the lever.
  • At the cam-side lever end region of the side wall portion 2 is retracted inwardly and thereby the distance of the side wall sections 1, 2 to each other less than the rest of the course.
  • the sleeve is pressed at its end portions on an outer side of a side wall portion 1, 2 of the rocker arm in theracöff- openings 3, 4 with slightly oversized diameter.
  • the axially aligned cut-out wall sections 5, 6 of the sleeve are aligned such that they are radially opposite the recesses 7, 8 at the receiving openings 3, 4 of the tilting lever.
  • the sleeve forms at its outer diameter in the receiving openings 3, 4 with the side wall sections 1, 2 a press fit. It protrudes at both ends with a slight axial projection on the receiving openings 3, 4 at its ends.
  • the receiving openings 3, 4 with the rectangular recesses 7, 8 are introduced by punching in a sheet metal body.
  • the diameter of the receiving openings 3, 4 is slightly smaller than the outer diameter of the sleeve in order to achieve an interference fit between the sleeve and receiving openings 3, 4.
  • the sheet metal body is brought by deep drawing in the desired shape of the rocker arm.
  • the rocker arm is preferably made thin-walled and has a wall thickness d which is smaller than 3 mm.
  • the sleeve is preferably made in sheet by deep drawing.
  • the cut edges 9, 10 are punched out.
  • the sleeve on the inner diameter after the common case hardening with the rocker arm can be reworked exciting. For this purpose, the sleeve must have an excess on the inner diameter.
  • FIG. 5 shows a perspective individual view of the sleeve.
  • the wall sections 5, 6 are cut out in tab-like fashion at parallel cutting edges 9, 10 extending in the axial direction.
  • the cut-out wall sections 5, 6 are arranged axially aligned with one another. They are each bent between their axially inner bending edges 18, 19 and their free end-side axially outer ends 1 1, 12 radially outward.
  • the cut edges 9, 10, the frontal free ends 1 1, 12 and the bending edges 18, 19 in each case form the rectangular shape of the wall sections 5, 6.
  • the cut edges 9, 10 form aligned in the circumferential direction planar contact surfaces for positive engagement with the recesses 7, 8 of the receiving openings 3, 4.
  • the bent wall sections 5, 6 rectangular recesses.
  • the sleeve is preferably produced in sheet metal by deep drawing and executed with a radial wall thickness s, which is in a range of 1 mm ⁇ s ⁇ 1, 5 mm.
  • the axial length of the sleeve is variable. It corresponds at least to the rocker arm width.
  • Figure 6 shows a side view of the rocker arm without the sleeve.
  • the recesses 7, 8 which are rectangular in cross section are formed on the inner diameter of the receiving openings 3, 4.
  • the receiving openings 3, 4 are on the side wall sections 1, 2 in the vertical direction approximately midway between the lever top with the cross bar 17 and the open lever bottom and in Hebeltnaturesraum approximately midway between the valve contact portion 16 on the valve-side lever end and the receiving holes for the axis, not shown the cam roller on the cam-side Hebelend Scheme arranged.
  • the side wall sections 1, 2 are designed to be enlarged in a vertical height relative to the embodiment at the lever end regions.
  • the recesses 7, 8 are on the side of the receiving openings facing the valve-side lever end region. 3, 4 arranged.

Landscapes

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

Abstract

L'invention concerne un ensemble culbuteur destiné à une commande de soupapes d'un moteur à combustion interne comportant un culbuteur, des orifices de réception (3, 4) alignés étant ménagés au niveau de parties de paroi latérale (1, 2) opposées du culbuteur dans une zone centrale, située entre deux zones d'extrémité de culbuteur, pour monter le culbuteur de façon pivotante sur un axe de culbuteur. L'invention est caractérisée en ce qu'un manchon est disposé, au niveau de ses zones d'extrémité axiales, dans les orifices de réception (3, 4) par une liaison par engagement de forces et comporte, pour la fixation, des parties de paroi (5, 6), découpées en forme d'attache, qui s'engagent, en étant pliées, par complémentarité de formes dans des évidements correspondants (7, 8) ménagés au niveau du diamètre intérieur des orifices de réception (3, 4. L'invention concerne en outre un procédé de montage d'un ensemble culbuteur.
PCT/DE2015/200145 2014-05-09 2015-03-12 Ensemble culbuteur pour commande de soupapes d'un moteur à combustion interne et procédé de montage d'un ensemble culbuteur Ceased WO2015169301A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014208809.7A DE102014208809A1 (de) 2014-05-09 2014-05-09 Kipphebelanordnung für einen Ventiltrieb einer Brennkraftmaschine und Verfahren zur Montage einer Kipphebelanordnung
DE102014208809.7 2014-05-09

Publications (1)

Publication Number Publication Date
WO2015169301A1 true WO2015169301A1 (fr) 2015-11-12

Family

ID=52807483

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2015/200145 Ceased WO2015169301A1 (fr) 2014-05-09 2015-03-12 Ensemble culbuteur pour commande de soupapes d'un moteur à combustion interne et procédé de montage d'un ensemble culbuteur

Country Status (2)

Country Link
DE (1) DE102014208809A1 (fr)
WO (1) WO2015169301A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018127729A1 (de) * 2018-11-07 2020-05-07 Auto-Kabel Management Gmbh Verfahren zur Herstellung eines Anschlussteils für elektrische Anlagen, Anschlussteil sowie Verbindung eines Anschlussteils mit einem Kabel

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4872429A (en) * 1987-12-14 1989-10-10 Ford Motor Company Method of making low friction finger follower rocker arms
DE3933119A1 (de) * 1989-10-04 1991-04-11 Schaeffler Waelzlager Kg Lagerbolzen fuer ein radialwaelzlager
JP2003056314A (ja) * 2001-08-22 2003-02-26 Nsk Ltd ロッカーアーム
JP2003343695A (ja) * 2002-05-28 2003-12-03 Koyo Seiko Co Ltd カムフォロワ
EP1387049A1 (fr) * 2002-08-02 2004-02-04 Bayerische Motoren Werke Aktiengesellschaft Culbuteur pour une commande de soupapes à levée variable
DE102012206178A1 (de) * 2012-04-16 2013-10-17 Schaeffler Technologies AG & Co. KG Kipphebel
EP2677124A1 (fr) * 2012-06-20 2013-12-25 Otics Corporation Poussoir à galet pour moteur à combustion interne
DE102012213662A1 (de) 2012-08-02 2014-02-06 Schaeffler Technologies AG & Co. KG Kipphebel
DE102013218644A1 (de) 2013-02-15 2014-08-21 Schaeffler Technologies Gmbh & Co. Kg Verfahren zur Herstellung eines Kipphebels und Kipphebel für einen Ventiltrieb einer Brennkraftmaschine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4872429A (en) * 1987-12-14 1989-10-10 Ford Motor Company Method of making low friction finger follower rocker arms
DE3933119A1 (de) * 1989-10-04 1991-04-11 Schaeffler Waelzlager Kg Lagerbolzen fuer ein radialwaelzlager
JP2003056314A (ja) * 2001-08-22 2003-02-26 Nsk Ltd ロッカーアーム
JP2003343695A (ja) * 2002-05-28 2003-12-03 Koyo Seiko Co Ltd カムフォロワ
EP1387049A1 (fr) * 2002-08-02 2004-02-04 Bayerische Motoren Werke Aktiengesellschaft Culbuteur pour une commande de soupapes à levée variable
DE102012206178A1 (de) * 2012-04-16 2013-10-17 Schaeffler Technologies AG & Co. KG Kipphebel
EP2677124A1 (fr) * 2012-06-20 2013-12-25 Otics Corporation Poussoir à galet pour moteur à combustion interne
DE102012213662A1 (de) 2012-08-02 2014-02-06 Schaeffler Technologies AG & Co. KG Kipphebel
WO2014019735A1 (fr) * 2012-08-02 2014-02-06 Schaeffler Technologies AG & Co. KG Culbuteur
DE102013218644A1 (de) 2013-02-15 2014-08-21 Schaeffler Technologies Gmbh & Co. Kg Verfahren zur Herstellung eines Kipphebels und Kipphebel für einen Ventiltrieb einer Brennkraftmaschine

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Publication number Publication date
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