WO2012013376A1 - Cup tappet and method for producing same - Google Patents

Cup tappet and method for producing same Download PDF

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Publication number
WO2012013376A1
WO2012013376A1 PCT/EP2011/057855 EP2011057855W WO2012013376A1 WO 2012013376 A1 WO2012013376 A1 WO 2012013376A1 EP 2011057855 W EP2011057855 W EP 2011057855W WO 2012013376 A1 WO2012013376 A1 WO 2012013376A1
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WO
WIPO (PCT)
Prior art keywords
cup
tappet
combustion engine
internal combustion
outside
Prior art date
Application number
PCT/EP2011/057855
Other languages
German (de)
French (fr)
Inventor
Günter EISENHARDT
Original Assignee
Schaeffler Technologies Gmbh & 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 Gmbh & Co. Kg filed Critical Schaeffler Technologies Gmbh & Co. Kg
Priority to CN201180036409.3A priority Critical patent/CN103026012B/en
Publication of WO2012013376A1 publication Critical patent/WO2012013376A1/en

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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
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
    • 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

Definitions

  • the invention relates to a tappet for an internal combustion engine and to a method for the production thereof.
  • the tappet has a tappet housing with a hollow cylindrical cup shirt and a cup bottom on one side closing cup bottom on which the cup shirt is formed by means of chipless cold forming.
  • the outer side of the cup base serves as a contact surface for a tappet hubbeauf waveden the cam of the internal combustion engine, and the outside of the cup top serves as a contact surface for a cup tappet in the stroke direction overlying guide bore of the internal combustion engine.
  • Such tappets are typically used in the gas exchange valve drive of an internal combustion engine to transmit the cam lobe of a camshaft in an opening movement of the associated gas exchange valve.
  • the bucket tappet as a tappet for the cam of a fuel injection pump to transmit the survey of the pump cam on the plunger of the injection pump.
  • it is mechanically highly stressed components, the first, the Hertz occurring in cam contact 'rule pressures sufficiently comparable to endure little wear and sufficient wear to another and must be stored noise in its guide bore.
  • the present invention is based on the object, a bucket tappet of the type mentioned and a method for its production in each case with regard to further reduced manufacturing costs.
  • the solution of this object is the device side of the characterizing features of claim 1 and the method side of the characterizing features of claim 4. Accordingly, the outside of the plunger housing to be machined only on the outside of the cup skirt. In other words, the end and typically abrasive machining of the plunger outer side is to be limited to the guide contact surface on the cup shirt, while the cam contact surface on the outside of the cup bottom is not subjected to machining. The geometry and surface roughness of the cam contact surface required for the low-wear cam contact are then set only via the non-cutting cold forming process of the tappet housing with a suitably adapted forming tool and optionally via the subsequent heat treatment of the tappet housing.
  • the cold forming process is particularly preferably the deep drawing of the tappet housing, which is known per se, from a sheet steel plate. Alternatively, it may also be a die-pressed ram housing.
  • Tests by the applicant with such bucket tappets have surprisingly shown that the previously customary, fine machining of the cam contact surface is not required in each case to the surface wear of the cam contact surface and / or the cam sufficiently small hold. In this respect, a refined, ie comparatively rough, surface accuracy is often sufficient, which can also be represented with a correspondingly adapted forming tool. Contrary to many years of manufacturing practice, it is thus possible in favor of a considerable cost saving to dispense with the grinding process of the cam contact surface with a comparable functional behavior of the bucket tappet.
  • the tappets should consist exclusively of the plunger housing.
  • it is a so-called mechanical plunger, which consists of a single component.
  • conditional valve clearance in the gas exchange valve drive can be adjusted in this case by individual Zusortierung a tappet with a corresponding selected thickness of the cup bottom.
  • Such a tappet is basically known from DE 198 15 790 B4.
  • a grinding of the inside of the cup bottom namely be provided on the contact surface to the shaft of the gas exchange valve.
  • they may be multi-piece bucket tappets and, in particular, those provided with a hydraulic valve clearance compensation element for automatic valve lash adjustment.
  • Figure 1 shows a gas exchange valve drive with mechanical bucket tappet in
  • FIG. 2 shows a hydraulic tappet with a cylindrical cam contact surface in a cutaway perspective view.
  • Figure 1 discloses a trained as a bucket tappet gas exchange valve drive an internal combustion engine with mechanical valve clearance compensation.
  • the mechanical bucket tappet 1 consists exclusively of a cup-shaped tappet housing 2, which is made in one piece by chipless cold forming of a steel blank and here by deep drawing a sheet metal blank.
  • the plunger housing 2 is composed of a hollow cylindrical cup shirt 3 and a cup base 4, to which the cup shirt 3 is formed and which closes the cup 3 on one side.
  • the outside of the cup base 4 serves as a contact surface 5 for a cam 6, the elevation of the tappets 1 in an opening movement of the spring-loaded in the closing direction gas exchange valve 7 is transmitted.
  • the outer side of the cup 3 serves as a contact surface 8 for a cup tappet 1 in the stroke direction overlapping guide bore 9 of the internal combustion engine.
  • the inside of the cup base 4 is provided with an elevation 10 extending in the axial direction of the gas exchange valve 7, which contacts the shaft of the gas exchange valve 7 at the end.
  • the valve clearance adjustment is carried out by sorting a tappet 1 with a height of the elevation 10 suitable for the setpoint valve clearance to be set, wherein the tappet 1 is selected and mounted from a group sorting with elevations 10 of different heights.
  • a finely machined, in particular ground end face 12 of the elevation 10 can be provided.
  • the thermoformed plunger housing 2 which is subsequently deep-drawn and subsequently heat-hardened, is machined on its outside only on the outside of the cup shirt 3, ie on the guide contact surface 8, and ground here. This ensures that the required dimensional and shape tolerances of the cup shirt 3 in the guide bore 9 are in their desired range.
  • the outside of the cup base 4, ie the cam contact surface 5 is ing unprocessed and has a surface structure and geometry that has been generated in the deep-drawing process and in the heat treatment of the plunger housing 2.
  • the cam contact surface 5 is spherical, the center of which is raised by only a few micrometers with respect to its outer edge region.
  • the tappet V shown in Figure 2 is provided for a gas exchange valve drive with hydraulic valve clearance compensation.
  • the corresponding multi-part bucket tappet V comprises in addition to the plunger housing 2 'a hydraulic valve clearance compensation element 13 and a on the inside of the cup 3' oil-tight welded receiving plate 14 for the lash adjuster 13.
  • the required securing of the tappet 1 'against rotation in its guide bore (not shown) is assumed by a cup 3' secured against rotation 15, which engages in a complementary longitudinal groove in the guide bore.
  • the plunger housing 2 ' is also deep drawn from a sheet steel plate and then cured. As in the cup tappet 1 shown in FIG. 1, its outside is ground only on the cylindrical guide contact surface 8 ', while the outside of the cup bottom 4' including the cam contact surface 5 'is unworked.

Abstract

The invention relates to a cup tappet (1, 1') for an internal combustion engine and to a method for producing same. The cup tappet has a tappet housing (2, 2') having a hollow cylindrical cup skirt (3, 3') and a cup base (4, 4;) which closes the tappet skirt on one side and on which the tappet skirt is formed by means of cold forming a steel blank without cutting. The outer face of the cup base serves as a contact surface (5, 5') for a cam (6) of the internal combustion engine, wherein said cam acts on the cup tappet to impart travel, and the outer face of the cup skirt serves as a contact surface (8, 8') for a guide bore (9) of the internal combustion engine accommodating the cup tappet in the direction of travel. To this end the outer face of the tappet housing should only be machined by cutting on the outer face of the cup skirt.

Description

Tassenstößel und Verfahren zu dessen Herstellung Beschreibung Die Erfindung betrifft einen Tassenstößel für eine Brennkraftmaschine und ein Verfahren zu dessen Herstellung. Der Tassenstößel weist ein Stößelgehäuse mit einem hohlzylindrischen Tassenhemd und einem das Tassenhemd einseitig verschließenden Tassenboden auf, an dem das Tassenhemd mittels spanloser Kaltumformung angeformt ist. Die Außenseite des Tassenbodens dient als Kontaktfläche für einen den Tassenstößel hubbeaufschlagenden Nocken der Brennkraftmaschine, und die Außenseite des Tassenhemds dient als Kontaktfläche für eine den Tassenstößel in Hubrichtung lagernde Führungsbohrung der Brennkraftmaschine. Hintergrund der Erfindung  Bucket tappet and method for its production DESCRIPTION The invention relates to a tappet for an internal combustion engine and to a method for the production thereof. The tappet has a tappet housing with a hollow cylindrical cup shirt and a cup bottom on one side closing cup bottom on which the cup shirt is formed by means of chipless cold forming. The outer side of the cup base serves as a contact surface for a tappet hubbeaufschlagenden the cam of the internal combustion engine, and the outside of the cup top serves as a contact surface for a cup tappet in the stroke direction overlying guide bore of the internal combustion engine. Background of the invention
Derartige Tassenstößel werden typischerweise im Gaswechselventiltrieb einer Brennkraftmaschine verwendet, um die Nockenerhebung einer Nockenwelle in eine Öffnungsbewegung des zugehörigen Gaswechselventils zu übertragen. Daneben besteht die Möglichkeit, den Tassenstößel als Abgriffselement für den Nocken einer Kraftstoffeinspritzpumpe zu verwenden, um die Erhebung des Pumpennockens auf den Plunger der Einspritzpumpe zu übertragen. In jedem Fall handelt es sich um mechanisch hoch belastete Bauteile, die zum einen die im Nockenkontakt auftretenden Hertz'schen Pressungen hinreichend ver- schleißarm ertragen müssen und zum anderen hinreichend verschleiß- und geräuscharm in ihrer Führungsbohrung zu lagern sind. Such tappets are typically used in the gas exchange valve drive of an internal combustion engine to transmit the cam lobe of a camshaft in an opening movement of the associated gas exchange valve. In addition, it is possible to use the bucket tappet as a tappet for the cam of a fuel injection pump to transmit the survey of the pump cam on the plunger of the injection pump. In any case, it is mechanically highly stressed components, the first, the Hertz occurring in cam contact 'rule pressures sufficiently comparable to endure little wear and sufficient wear to another and must be stored noise in its guide bore.
Bereits seit längerer Zeit weisen großseriengerechte Tassenstößel aus Kostengründen spanlos kaltumgeformte Stößelgehäuse aus Stahl auf, die zwecks Härtesteigerung aller Kontaktflächen anschließend wärmebehandelt werden. Die spanend erzeugte Endkontur des Stößelgehäuses erfolgt typischerweise in einem Schleifprozess, in dem die Außenseite des Tassenhemds, d.h. die Führungskontaktfläche auf das für die Längsführung des Tassenstößels erfordern- che Passmaß und die Außenseite des Tassenbodens, d.h. die Nockenkontaktfläche auf die für den Nockenkontakt erforderliche Oberflächengeometrie unter jeweiliger Verringerung der Oberflächenrauhigkeit fertig bearbeitet werden. Aufgabe der Erfindung For a long time, mass-produced cup tappets for cost reasons have cold-formed ram housings made of steel, which are subsequently heat-treated for the purpose of increasing the hardness of all contact surfaces. The end contour of the tappet housing produced by machining is typically carried out in a grinding process in which the outside of the cup top, ie the guide contact surface, requires the length required for the longitudinal movement of the tappet. che fit and the outside of the cup base, ie the cam contact surface to the required surface contact for the cam surface finish with a respective reduction in the surface roughness finish. Object of the invention
Der vorliegenden Erfindung liegt die Aufgabe zu Grunde, einen Tassenstößel der eingangs genannten Art und ein Verfahren zu dessen Herstellung jeweils im Hinblick auf weiterhin reduzierte Herstellkosten fortzubilden. The present invention is based on the object, a bucket tappet of the type mentioned and a method for its production in each case with regard to further reduced manufacturing costs.
Zusammenfassung der Erfindung Summary of the invention
Die Lösung dieser Aufgabe ergibt sich vorrichtungsseitig aus den kennzeichnenden Merkmalen des Anspruchs 1 und verfahrensseitig aus den kennzeich- nenden Merkmalen des Anspruchs 4. Demnach soll die Außenseite des Stößelgehäuses lediglich an der Außenseite des Tassenhemds spanend bearbeitet sein. Mit anderen Worten soll sich die spanende End- und typischerweise Schleifbearbeitung der Stößelaußenseite auf die Führungskontaktfläche auf dem Tassenhemd beschränken, während die Nockenkontaktfläche auf der Au- ßenseite des Tassenbodens keiner spanenden Nachbearbeitung unterzogen wird. Die für den verschleißarmen Nockenkontakt erforderliche Geometrie und Oberflächenrauhigkeit der Nockenkontaktfläche werden dann lediglich über den spanlosen Kaltumformprozess des Stößelgehäuses mit einem entsprechend angepassten Umformwerkzeug und gegebenenfalls über die anschließende Wärmebehandlung des Stößelgehäuses eingestellt. Bei dem Kaltumformprozess handelt es sich besonders bevorzugt um das an sich bekannte Tiefziehen des Stößelgehäuses aus einer Stahlblechplatine. Alternativ kann es sich auch um ein fließgepresstes Stößelgehäuse handeln. Erprobungen der Anmelderin mit derartigen Tassenstößeln haben überraschenderweise gezeigt, dass die bisher übliche, spanende Feinbearbeitung der Nockenkontaktfläche nicht in jedem Fall erforderlich ist, um den Oberflächenverschleiß der Nockenkontaktfläche und/oder des Nockens hinreichend klein zu halten. Diesbezüglich ist oft eine entfeinerte, d.h. vergleichsweise grobe Oberflächengenauigkeit ausreichend, die auch mit einem entsprechend angepass- ten Umformwerkzeug dargestellt werden kann. Entgegen der langjährigen Herstellpraxis ist es also zugunsten einer erheblichen Kosteneinsparung möglich, bei vergleichbarem Funktionsverhalten des Tassenstößels auf den Schleifpro- zess der Nockenkontaktfläche zu verzichten. The solution of this object is the device side of the characterizing features of claim 1 and the method side of the characterizing features of claim 4. Accordingly, the outside of the plunger housing to be machined only on the outside of the cup skirt. In other words, the end and typically abrasive machining of the plunger outer side is to be limited to the guide contact surface on the cup shirt, while the cam contact surface on the outside of the cup bottom is not subjected to machining. The geometry and surface roughness of the cam contact surface required for the low-wear cam contact are then set only via the non-cutting cold forming process of the tappet housing with a suitably adapted forming tool and optionally via the subsequent heat treatment of the tappet housing. The cold forming process is particularly preferably the deep drawing of the tappet housing, which is known per se, from a sheet steel plate. Alternatively, it may also be a die-pressed ram housing. Tests by the applicant with such bucket tappets have surprisingly shown that the previously customary, fine machining of the cam contact surface is not required in each case to the surface wear of the cam contact surface and / or the cam sufficiently small hold. In this respect, a refined, ie comparatively rough, surface accuracy is often sufficient, which can also be represented with a correspondingly adapted forming tool. Contrary to many years of manufacturing practice, it is thus possible in favor of a considerable cost saving to dispense with the grinding process of the cam contact surface with a comparable functional behavior of the bucket tappet.
In vorteilhafter Weiterbildung der Erfindung soll der Tassenstößel ausschließlich aus dem Stößelgehäuse bestehen. In diesem Fall handelt es sich um einen sogenannten mechanischen Stößel, der aus einem einzigen Bauelement besteht. Durch Bauteiltoleranzen bedingtes Ventilspiel im Gaswechselventiltrieb kann in diesem Fall durch individuelle Zusortierung eines Tassenstößels mit entsprechend ausgewähltem Dickenmaß des Tassenbodens eingestellt werden. Ein derartiger Tassenstößel ist grundsätzlich aus der DE 198 15 790 B4 vorbekannt. In spezifischen Anwendungsfällen kann eine Schleifbearbeitung der Innenseite des Tassenbodens, nämlich an der Kontaktfläche zum Schaft des Gaswechselventils vorgesehen sein. Alternativ kann es sich um mehrteilige Tassenstößel und insbesondere um solche handeln, die mit einem hydraulischen Ventilspielausgleichselement zur automatischen Ventilspieleinstellung versehen sind. In an advantageous embodiment of the invention, the tappets should consist exclusively of the plunger housing. In this case, it is a so-called mechanical plunger, which consists of a single component. By component tolerances conditional valve clearance in the gas exchange valve drive can be adjusted in this case by individual Zusortierung a tappet with a corresponding selected thickness of the cup bottom. Such a tappet is basically known from DE 198 15 790 B4. In specific applications, a grinding of the inside of the cup bottom, namely be provided on the contact surface to the shaft of the gas exchange valve. Alternatively, they may be multi-piece bucket tappets and, in particular, those provided with a hydraulic valve clearance compensation element for automatic valve lash adjustment.
Kurze Beschreibung der Zeichnungen Brief description of the drawings
Weitere Merkmale der Erfindung ergeben sich aus der nachfolgenden Be- Schreibung und aus den Zeichnungen, in denen Ausführungsbeispiele der Erfindung dargestellt sind. Es zeigen: Further features of the invention will become apparent from the following description and from the drawings in which embodiments of the invention are shown. Show it:
Figur 1 einen Gaswechselventiltrieb mit mechanischem Tassenstößel im Figure 1 shows a gas exchange valve drive with mechanical bucket tappet in
Längsschnitt und  Longitudinal section and
Figur 2 einen hydraulischen Tassenstößel mit zylindrischer Nockenkontaktfläche in aufgeschnittener perspektivischer Darstellung. Ausführliche Beschreibung der Zeichnungen 2 shows a hydraulic tappet with a cylindrical cam contact surface in a cutaway perspective view. Detailed description of the drawings
Figur 1 offenbart einen als Tassenstößeltrieb ausgebildeten Gaswechselventiltrieb einer Brennkraftmaschine mit mechanischem Ventilspielausgleich. Der mechanische Tassenstößel 1 besteht ausschließlich aus einem tassenförmigen Stößelgehäuse 2, das mittels spanloser Kaltumformung eines Stahlrohlings und hier mittels Tiefziehen einer Blechplatine einstückig hergestellt ist. Das Stößelgehäuse 2 setzt sich aus einem hohlzylindrischen Tassenhemd 3 und einem Tassenboden 4 zusammen, an den das Tassenhemd 3 angeformt ist und der das Tassenhemd 3 einseitig verschließt. Die Außenseite des Tassenbodens 4 dient als Kontaktfläche 5 für einen Nocken 6, dessen Erhebung vom Tassenstößel 1 in eine Öffnungsbewegung des in Schließrichtung federkraftbeaufschlagten Gaswechselventils 7 übertragen wird. Die Außenseite des Tassenhemds 3 dient als Kontaktfläche 8 für eine den Tassenstößel 1 in Hubrichtung lagernde Führungsbohrung 9 der Brennkraftmaschine. Figure 1 discloses a trained as a bucket tappet gas exchange valve drive an internal combustion engine with mechanical valve clearance compensation. The mechanical bucket tappet 1 consists exclusively of a cup-shaped tappet housing 2, which is made in one piece by chipless cold forming of a steel blank and here by deep drawing a sheet metal blank. The plunger housing 2 is composed of a hollow cylindrical cup shirt 3 and a cup base 4, to which the cup shirt 3 is formed and which closes the cup 3 on one side. The outside of the cup base 4 serves as a contact surface 5 for a cam 6, the elevation of the tappets 1 in an opening movement of the spring-loaded in the closing direction gas exchange valve 7 is transmitted. The outer side of the cup 3 serves as a contact surface 8 for a cup tappet 1 in the stroke direction overlapping guide bore 9 of the internal combustion engine.
Die Innenseite des Tassenbodens 4 ist mit einer sich in Axialrichtung des Gaswechselventils 7 erstreckenden Erhebung 10 versehen, die den Schaft des Gaswechselventils 7 stirnseitig kontaktiert. Die Ventilspieleinstellung erfolgt durch Zusortierung eines Tassenstößels 1 mit einer für das einzustellende Soll- Ventilspiel geeigneten Höhe 11 der Erhebung 10, wobei der Tassenstößel 1 aus einer Gruppensortierung mit verschieden hohen Erhebungen 10 ausgewählt und montiert wird. Je nach Anwendungsfall kann eine spanend feinbearbeitete, insbesondere geschliffene Stirnfläche 12 der Erhebung 10 vorgesehen sein. The inside of the cup base 4 is provided with an elevation 10 extending in the axial direction of the gas exchange valve 7, which contacts the shaft of the gas exchange valve 7 at the end. The valve clearance adjustment is carried out by sorting a tappet 1 with a height of the elevation 10 suitable for the setpoint valve clearance to be set, wherein the tappet 1 is selected and mounted from a group sorting with elevations 10 of different heights. Depending on the application, a finely machined, in particular ground end face 12 of the elevation 10 can be provided.
Gemäß den eingezeichneten Symbolen der Oberflächenbeschaffenheit ist das tiefgezogene und zwecks Härtesteigerung anschließend wärmebehandelte Stößelgehäuse 2 an dessen Außenseite lediglich an der Außenseite des Tassen- hemds 3, d.h. an der Führungskontaktfläche 8 spanend bearbeitet und hier geschliffen. Dies gewährleistet, dass die erforderlichen Maß- und Formtoleranzen des Tassenhemds 3 in der Führungsbohrung 9 in deren Sollbereich liegen. Die Außenseite des Tassenbodens 4, d.h. die Nockenkontaktfläche 5 ist hinge- gen spanend unbearbeitet und weist eine Oberflächenstruktur und -geometrie auf, die im Tiefziehprozess und bei der Wärmebehandlung des Stößelgehäuses 2 erzeugt worden ist. Um verschleißkritische Kantenträger gegenüber dem Nocken 6 zu vermeiden, ist die Nockenkontaktfläche 5 sphärisch ausgebildet, wobei deren Mitte um lediglich wenige Mikrometer gegenüber deren äußeren Randbereich erhaben ist. According to the drawn symbols of the surface condition, the thermoformed plunger housing 2, which is subsequently deep-drawn and subsequently heat-hardened, is machined on its outside only on the outside of the cup shirt 3, ie on the guide contact surface 8, and ground here. This ensures that the required dimensional and shape tolerances of the cup shirt 3 in the guide bore 9 are in their desired range. The outside of the cup base 4, ie the cam contact surface 5 is ing unprocessed and has a surface structure and geometry that has been generated in the deep-drawing process and in the heat treatment of the plunger housing 2. In order to avoid wear-resistant edge supports with respect to the cam 6, the cam contact surface 5 is spherical, the center of which is raised by only a few micrometers with respect to its outer edge region.
Der in Figur 2 dargestellte Tassenstößel V ist für einen Gaswechselventiltrieb mit hydraulischem Ventilspielausgleich vorgesehen. Der entsprechend mehrtei- lige Tassenstößel V umfasst neben dem Stößelgehäuse 2' ein hydraulisches Ventilspielausgleichselement 13 und ein an der Innenseite des Tassenhemds 3' öldicht angeschweißtes Aufnahmeblech 14 für das Ventilspielausgleichselement 13. Anders als der Tassenstößel 1 gemäß Figur 1 ist die Nocken kontaktfläche 5' zugunsten eines vergleichsweise geringen Durchmessers des Tas- senstößels 1 ' konvex zylindrisch gestaltet. Die hierbei erforderliche Sicherung des Tassenstößels 1 ' gegen Verdrehen in dessen Führungsbohrung (nicht dargestellt) übernimmt ein am Tassenhemd 3' befestigter Verdrehsicherungskör- per 15, der in eine dazu komplementäre Längsnut in der Führungsbohrung eingreift. The tappet V shown in Figure 2 is provided for a gas exchange valve drive with hydraulic valve clearance compensation. The corresponding multi-part bucket tappet V comprises in addition to the plunger housing 2 'a hydraulic valve clearance compensation element 13 and a on the inside of the cup 3' oil-tight welded receiving plate 14 for the lash adjuster 13. Unlike the tappet 1 according to Figure 1, the cam contact surface 5 'favor a comparatively small diameter of the TAS senstößels 1 'convex cylindrical designed. The required securing of the tappet 1 'against rotation in its guide bore (not shown) is assumed by a cup 3' secured against rotation 15, which engages in a complementary longitudinal groove in the guide bore.
Das Stößelgehäuse 2' ist ebenfalls aus einer Stahlblechplatine tiefgezogen und anschließend gehärtet. Wie bei dem in Figur 1 dargestellten Tassenstößel 1 ist dessen Außenseite lediglich an der zylindrischen Führungskontaktfläche 8' geschliffen, während die Außenseite des Tassenbodens 4' einschließlich der No- ckenkontaktfläche 5' spanend unbearbeitet ist. Liste der Bezugszahlen The plunger housing 2 'is also deep drawn from a sheet steel plate and then cured. As in the cup tappet 1 shown in FIG. 1, its outside is ground only on the cylindrical guide contact surface 8 ', while the outside of the cup bottom 4' including the cam contact surface 5 'is unworked. List of reference numbers
1 Tassenstößel 1 tappet
2 Stößelgehäuse  2 ram housing
3 Tassenhemd 3 cup shirt
4 Tassenboden  4 cup bottom
5 Nockenkontaktfläche  5 cam contact surface
6 Nocken  6 cams
7 Gaswechselventil  7 gas exchange valve
8 Führungskontaktfläche 8 guide contact surface
9 Führungsbohrung  9 pilot hole
10 Erhebung  10 survey
Höhe der Erhebung  Height of the survey
12 Stirnfläche der Erhebung  12 face of the survey
13 Ventilspielausgleichselement 13 valve clearance compensation element
14 Aufnahmeblech  14 recording plate
15 Verdrehsicherungskörper  15 anti-rotation body

Claims

Patentansprüche claims
1. Tassenstößel (1 , 1 ') für eine Brennkraftmaschine, aufweisend ein Stößelgehäuse (2, 2') mit einem hohlzylindrischen Tassenhemd (3, 3') und einem das Tassenhemd (3, 3') einseitig verschließenden Tassenboden (4, 4'), an dem das Tassenhemd (3, 3') mittels spanloser Kaltumformung eines Stahlrohlings angeformt ist, wobei die Außenseite des Tassenbodens (4, 4') als Kontaktfläche (5, 5') für einen den Tassenstößel (1 , 1 ') hubbeaufschlagenden Nocken (6) der Brennkraftmaschine dient und wobei die Außenseite des Tassenhemds (3, 3') als Kontaktfläche (8, 8') für eine den Tassenstößel (1 , 1 ') in Hubrichtung lagernde Führungsbohrung (9) der Brennkraftmaschine dient, dadurch gekennzeichnet, dass die Außenseite des Stößelgehäuses (2, 2') lediglich an der Außenseite des Tassenhemds (3, 3') spanend bearbeitet ist. 1. cup tappets (1, 1 ') for an internal combustion engine, comprising a plunger housing (2, 2') with a hollow cylindrical cup shirt (3, 3 ') and a cup shirt (3, 3') on one side closing cup bottom (4, 4 ' ), on which the cup shirt (3, 3 ') is integrally formed by chipless cold forming of a steel blank, wherein the outside of the cup bottom (4, 4') as a contact surface (5, 5 ') for a tappet (1, 1') hubbeaufschlagenden Cam (6) of the internal combustion engine is used and wherein the outside of the cup top (3, 3 ') serves as a contact surface (8, 8') for a tappet (1, 1 ') in the stroke direction bearing guide bore (9) of the internal combustion engine, characterized in that the outside of the plunger housing (2, 2 ') is machined only on the outside of the cup top (3, 3').
2. Tassenstößel (1 , 1 ') nach Anspruch 1 , dadurch gekennzeichnet, dass es sich um ein mittels Tiefziehen einer Blechplatine umgeformtes Stößelgehäuse (2, 2') handelt. 2. tappets (1, 1 ') according to claim 1, characterized in that it is a formed by deep drawing a sheet metal plate ram housing (2, 2').
3. Tassenstößel (1) nach Anspruch 1 , dadurch gekennzeichnet, dass der Tassenstößel (1) ausschließlich aus dem Stößelgehäuse (2) besteht. 3. tappets (1) according to claim 1, characterized in that the tappet (1) consists exclusively of the tappet housing (2).
4. Verfahren zur Herstellung eines Tassenstößels (1 , 1 ') für eine Brennkraftmaschine, welcher Tassenstößel (1 , 1 ') ein Stößelgehäuse (2, 2') mit einem hohlzylindrischen Tassenhemd (3, 3') und einem das Tassenhemd (3, 3') einseitig verschließenden Tassenboden (4, 4') aufweist, an dem das Tassenhemd (3, 3') mittels spanloser Kaltumformung eines Stahlrohlings angeformt ist, wobei die Außenseite des Tassenbodens (4, 4') als Kontaktfläche (5, 5') für einen den Tassenstößel (1 , 1 ') hubbeaufschlagenden Nocken (6) der Brennkraftmaschine dient und wobei die Außenseite des Tassenhemds (3, 3') als Kontaktfläche (8, 8') für eine den Tassenstößel (1 , 1') in Hubrichtung lagernde Führungsbohrung (9) der Brennkraftmaschine dient, gekennzeichnet durch folgende Verfahrensschritte: - Tiefziehen des Stößelgehäuses (2, 2') aus einer Blechplatine; 4. A method for producing a tappet (1, 1 ') for an internal combustion engine, which tappets (1, 1') a plunger housing (2, 2 ') with a hollow cylindrical cup shirt (3, 3') and the cup shirt (3, 3 ') on one side closes cup bottom (4, 4'), on which the cup shirt (3, 3 ') is formed by chipless cold forming of a steel blank, wherein the outside of the cup bottom (4, 4') as a contact surface (5, 5 ' ) for a the cup tappet (1, 1 ') hubbeaufschlagenden cam (6) of the internal combustion engine is used and wherein the outside of the cup top (3, 3') as a contact surface (8, 8 ') for a tappet (1, 1') in Lifting direction bearing guide bore (9) of the internal combustion engine is used, characterized by the following process steps: - Deep drawing of the plunger housing (2, 2 ') from a sheet metal blank;
- Härten des Stößelgehäuses (2, 2') und  - Hardening of the plunger housing (2, 2 ') and
- Schleifen des gehärteten Stößelgehäuses (2, 2'), wobei dessen Außenseite lediglich an der Außenseite des Tassenhemds (3, 3') geschliffen wird.  - Grinding the hardened plunger housing (2, 2 '), wherein the outer side is ground only on the outside of the cup skirt (3, 3').
PCT/EP2011/057855 2010-07-26 2011-05-16 Cup tappet and method for producing same WO2012013376A1 (en)

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Application Number Priority Date Filing Date Title
CN201180036409.3A CN103026012B (en) 2010-07-26 2011-05-16 Cup type tappet and the method for the manufacture of this cup type tappet

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DE102010032254.7 2010-07-26
DE102010032254A DE102010032254A1 (en) 2010-07-26 2010-07-26 Cup tappets and method for its production

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US10119607B2 (en) 2016-04-15 2018-11-06 Koyo Bearings North America Llc Follower mechanism
US11143059B2 (en) 2019-10-03 2021-10-12 Koyo Bearings North America Llc Tappet assembly with unground outer cup
US11149593B2 (en) 2019-10-03 2021-10-19 Koyo Bearings North America Llc Tappet assembly with formed anti-rotation alignment device

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CN103203326B (en) * 2013-04-11 2014-09-24 机科发展科技股份有限公司 Automatic tappet detecting and sorting machine
DE102013113255A1 (en) 2013-11-29 2015-06-03 Thyssenkrupp Presta Teccenter Ag Adjustable camshaft
DE102014216961A1 (en) 2014-08-26 2016-03-03 Schaeffler Technologies AG & Co. KG Cup tappets and method for its production

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10119607B2 (en) 2016-04-15 2018-11-06 Koyo Bearings North America Llc Follower mechanism
US10385957B2 (en) 2016-04-15 2019-08-20 Koyo Bearings North America Llc Follower mechanism
US11143059B2 (en) 2019-10-03 2021-10-12 Koyo Bearings North America Llc Tappet assembly with unground outer cup
US11149593B2 (en) 2019-10-03 2021-10-19 Koyo Bearings North America Llc Tappet assembly with formed anti-rotation alignment device

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CN103026012A (en) 2013-04-03
CN103026012B (en) 2016-01-20

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