EP2406494B1 - Tappet - Google Patents

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Publication number
EP2406494B1
EP2406494B1 EP10709711.5A EP10709711A EP2406494B1 EP 2406494 B1 EP2406494 B1 EP 2406494B1 EP 10709711 A EP10709711 A EP 10709711A EP 2406494 B1 EP2406494 B1 EP 2406494B1
Authority
EP
European Patent Office
Prior art keywords
tappet
housing
bridge piece
shell
way
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.)
Active
Application number
EP10709711.5A
Other languages
German (de)
French (fr)
Other versions
EP2406494A1 (en
Inventor
Stefan Dorn
Norbert Geyer
Karsten Kucht
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
Priority to DE102009013130A priority Critical patent/DE102009013130A1/en
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Priority to PCT/EP2010/052742 priority patent/WO2010102942A1/en
Publication of EP2406494A1 publication Critical patent/EP2406494A1/en
Application granted granted Critical
Publication of EP2406494B1 publication Critical patent/EP2406494B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/14Tappets; Push rods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404Details, component parts specially adapted for such pumps
    • F04B27/0442Supporting and guiding means for the pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14Pistons, piston-rods or piston-rod connections
    • F04B53/144Adaptation of piston-rods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22Arrangements for enabling ready assembly or disassembly
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L1/053Camshafts overhead type
    • F01L2001/0535Single overhead camshafts [SOHC]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L1/053Camshafts overhead type
    • F01L2001/0537Double overhead camshafts [DOHC]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L2001/054Camshafts in cylinder block
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00Using particular materials
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00Manufacturing of components used in valve arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00Valve arrangements comprising rollers
    • F01L2305/02Mounting of rollers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2307/00Preventing the rotation of tappets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102Mechanical drive, e.g. tappets or cams
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/21Elements
    • Y10T74/2101Cams
    • Y10T74/2107Follower

Description

    Gebiet der ErfindungField of the invention
  • Die Erfindung betrifft einen Stößel, geeignet entweder für eine Kraftstoffhochdruckpumpe oder für einen Ventiltrieb einer qualitäts- oder quantitätsgeregelten Brennkraftmaschine, mit einem Gehäuse, dessen einem Nocken- oder Exzenteranlauf dienende Antriebsseite eine Rolle oder Gleitfläche immanent ist, wobei dessen einer Anlage eines Stößelfolgeteils dienende Abtriebsseite an einer Unterseite eines einen Innenmantel des Gehäuses durchragenden Brückenstücks liegt, wobei in einem Fenster des Gehäuses eine dessen Außenmantel überragende Verdrehsicherung verläuft, die aus einer Radialverlängerung des Brückenstück gebildet ist.The invention relates to a plunger, suitable for either a high-pressure fuel pump or a valve train of a quality or quantity-controlled internal combustion engine, with a housing whose cam or eccentric start serving drive side is immanent a roller or sliding surface, wherein its an abutment of a ram follower serving output side an underside of an inner shell of the housing projecting through the bridge piece, wherein in a window of the housing has an outer shell superior rotation, which is formed from a radial extension of the bridge piece.
  • Hintergrund der ErfindungBackground of the invention
  • Ein derartiger Stößel, hier zur Hubbetätigung eines Pumpenkolbens einer Kraftstoffpumpe, geht aus der DE 10 2006 057 246 A1 hervor. Als Verdrehsicherung für dessen Gehäuse dient eine Radialverlängerung seines Brückenstücks, die durch ein Fenster des Gehäuses ragt (s. Fig. 1a - 1c). Das Brückenstück ist in Richtung zur Abtriebsseite an einem Ringelement gehalten, das auf umfangsverteilten, vom Innenmantel des Gehäuses ausgehenden Nasen sitzt.Such a plunger, here for the lifting operation of a pump piston of a fuel pump, goes out of the DE 10 2006 057 246 A1 out. As a rotation for the housing is a radial extension of its bridge piece, which projects through a window of the housing (s. Fig. 1a - 1c ). The bridge piece is held in the direction of the output side on a ring element, sitting on circumferentially distributed, emanating from the inner shell of the housing lugs.
  • Aufgrund des separaten Halterings sowie der umlaufenden Nasen ist mit erhöhtem Material- sowie Montageaufwand zu rechnen.Due to the separate retaining ring and the circumferential lugs is expected to increase material and installation costs.
  • Ein Tassenstößel mit hydraulischem Ventilspielausgleich ist aus der DE-42 09 440 A1 bekannt. Das Stößelgehäuse mit einem Boden, einer Hülse und einer inneren Führungshülse soll aus keramischem Werkstoff hergestellt werden. Im Inneren ist ein Abdeckelement eingesetzt, das an zumindest einer Auswulstung an der Innenseite der Hülse fixiert ist. Das Abdeckelement weist weiterhin einen horizontalen Ansatz auf, der in einen Schlitz der Hülse ragt. Der horizontale Ansatz überragt den Schlitz nur geringfügig. Dadurch, dass das Abdeckelement aus metallischem Werkstoff - im Gegensatz zu dem keramischen Werkstoff des Tassenstößels - gefertigt ist, passt sich das Abdeckelement bzw. der horizontale Ansatz besonders gut der Durchmesservergrößerung der Bohrung des Zylinderkopfes im Fall einer Erwärmung an. Daraus folgt, dass der horizontale Ansatz und dessen Abmessung keine Verdrehsicherung darstellt sondern lediglich zum Spielausgleich des Tassenstößels in seiner Bohrung aufgrund von Wärmedehnungen vorgesehen sind.A bucket tappet with hydraulic lash adjuster is out of the DE-42 09 440 A1 known. The plunger housing with a bottom, a sleeve and an inner guide sleeve to be made of ceramic material. Inside, a cover is used, which is fixed to at least one Ausulstung on the inside of the sleeve. The cover also has a horizontal projection which projects into a slot of the sleeve. The horizontal approach surpasses the slot only slightly. The fact that the cover of metallic material - in contrast to the ceramic material of the bucket tappet - is made, the cover fits or the horizontal approach particularly well the diameter increase of the bore of the cylinder head in the event of heating. It follows that the horizontal approach and its dimension does not constitute an anti-rotation but are provided only for clearance compensation of the bucket tappet in its bore due to thermal expansion.
  • Es ist weiterhin bekannt, DE- 44 03 510 A1 , ein Ventilmodul herzustellen, das aus einem Ventil mit Ventilteller und Federn sowie aus einem Tassenstößel mit ebenem Boden und einer Hülse besteht. In dem Tassenstößel ist ein Spielausgleichselement eingebaut, das mittels eines Dichtungsbalgs im Inneren des Tassenstößels gehalten ist, wobei der Rand des Dichtungsbalgs am Übergang zwischen dem Boden und der Hülse im Tassenstößel fixiert ist.It is also known DE 44 03 510 A1 to produce a valve module which consists of a valve with valve disc and springs and a tappet with a flat bottom and a sleeve. In the bucket tappet a clearance compensation element is installed, which is held by means of a sealing bellows in the interior of the bucket tappet, wherein the edge of the sealing bellows is fixed at the transition between the bottom and the sleeve in the bucket tappet.
  • Eine Verdrehsicherung oder Rastbefestigung eines Bauteils am Tassenstößel ist nicht vorgesehen.An anti-rotation or latching attachment of a component on the bucket tappet is not provided.
  • Die US- 5 379 730 beschreibt einen Tassenstößel mit ebenem Boden und einer Hülse, in dem ein hydraulisches Ventilspielausgleichselement eingebaut werden soll, das von einem Blechzylinder im Inneren des Tassenstößels gehalten ist. Der Blechzylinder wird nach Einfügen in den Tassenstößel durch einen Rollier Vorgang an der Hülse befestigt. Zur Herstellung des Rollierwulstes im Blechzylinder und der Hülse dient ein inneres Werkzeug 47 und ein äußeres Werkzeug 45. Beim Einfügen des Blechzylinders in den Tassenstößel sind keine Vorsprünge, Rasten oder dergleichen vorgesehen. Die Fixierung erfolgt erst nachträglich durch den Rolliervorgang. Der Tassenstößel weist auch keine Verdrehsicherung auf.The U.S. 5,379,730 describes a bucket tappet with a flat bottom and a sleeve in which a hydraulic valve clearance compensation element are installed should, which is held by a metal cylinder inside the tappet. The sheet metal cylinder is attached to the sleeve after insertion into the tappets by a rolling process. To manufacture the Rollierwulstes in the metal cylinder and the sleeve is an inner tool 47 and an outer tool 45. When inserting the sheet metal cylinder in the tappet no projections, notches or the like are provided. The fixation takes place only later by the rolling process. The tappet also has no anti-rotation.
  • Es ist auch noch einen Tassenstößel bekannt, DE-10 2004 056 458 A1 , bei dem im Inneren ein Dom eingesetzt ist, der mittels eines Sicherungsbleches fixiert wird. Das Sicherungsblech weist einen äußeren umgebörtelten Rand auf, mit dem das Sicherungsblech und damit der Dom im Inneren des Tassenstößels fixiert sind. Die Spannkraft der Randbördelung erzeugt die Haltekraft. Vorsprünge, Rasten oder auch eine Verdrehsicherung sind nicht vorgesehen.There is also a bucket tappet known DE-10 2004 056 458 A1 , in which inside a dome is inserted, which is fixed by means of a lock plate. The locking plate has an outer umgebörtelten edge with which the locking plate and thus the dome are fixed inside the bucket tappet. The elasticity of the edge beading generates the holding force. Projections, notches or an anti-rotation device are not provided.
  • Aufgabe der ErfindungObject of the invention
  • Aufgabe der Erfindung ist es daher, einen Stößel der vorgenannten Art zu schaffen, bei dem die aufgeführten Nachteile beseitigt sind.The object of the invention is therefore to provide a plunger of the aforementioned type, in which the disadvantages listed are eliminated.
  • Lösung der AufgabeSolution of the task
  • Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass am Innenmantel des Stößels, nur an einem dem Fenster diametral gegenüberliegenden Abschnitt, ein durch einen Stanz-Prägevorgang hergestellter, einteilig angebundener Vorsprung verläuft, der keilartig in Richtung zur Antriebsseite ansteigt, wobei das aus Stahlblech bestehende Brückenstück, mit seinem der Radialverlängerung diametral gegenüberliegenden Abschnitt, über den Vorsprung geschnappt ist und mit einem Randbereich dessen Unterseite auf diesem liegt.According to the invention this object is achieved in that on the inner surface of the plunger, only at a window diametrically opposite portion, a produced by a stamping stamping process, integrally connected projection extends in a wedge-like manner towards the drive side, wherein the existing steel sheet bridge piece, with its the radial extension diametrically opposite section, is snapped over the projection and with an edge region whose bottom is on this.
  • Somit liegt ein Stößel vor, bei dem die eingangs beschriebenen Nachteile beseitigt sind. Das hinter den Vorsprung geschnappte Brückenstück erfährt somit in Richtung zur Abtriebsseite eine Zweipunktlagerung im Fenster und auf dem Absatz. Ggf. können auch zwei leicht beabstandete Absätze dem Fenster gegenüberliegend appliziert sein. Aufgrund des Wegfalls des separaten Halterings nach dem Stand der Technik sind die Teilezahl sowie der Montageaufwand reduziert. Das Brückenstück wird im fertigen Zustand des Stößels, d.h. nach einem Härte- und Schleifvorgang, montiert und verläuft letztlich geringfügig spielbehaftet innerhalb seiner axialen Führung.Thus, there is a plunger, in which the disadvantages described above are eliminated. The bridge piece snapped behind the projection thus experiences a two-point bearing in the window and on the heel in the direction of the output side. Possibly. also two slightly spaced paragraphs can be applied opposite the window. Due to the omission of the separate retaining ring according to the prior art, the number of parts and the assembly costs are reduced. The bridge piece is mounted in the finished state of the plunger, ie after a hardening and grinding process, and ultimately runs slightly play in its axial guidance.
  • Der vorgenannte Stößel, der als Rollen- oder Gleitstößel vorgeschlagen ist, kann beispielsweise von einem Nocken an seiner Antriebsseite betätigt werden, der stirnseitig einer Nockenwelle eines Ventiltriebs der Brennkraftmaschine sitzt (Pumpenstößel). Denkbar und vorgesehen ist es jedoch auch, die huberzeugenden Mittel an einer beliebigen Welle der Brennkraftmaschine wie einer Ausgleichs- oder Kurbelwelle zu applizieren (Pumpenstößel). Im Fall eines Einsatzes des Stößels in einem Ventiltrieb einer Brennkraftmaschine kann dieser Stößel mit einem Nocken einer oben- oder untenliegenden Nockenwelle kommunizieren.The aforementioned plunger, which is proposed as a roller or sliding plunger, for example, can be actuated by a cam on its drive side, the front side of a camshaft of a valve train of the internal combustion engine sits (pump plunger). However, it is also conceivable and intended to apply the impact-generating means to any shaft of the internal combustion engine, such as a balancing or crankshaft (pump tappet). In the case of an insert of the plunger in a valve train of an internal combustion engine, this plunger can communicate with a cam of an overhead or underlying camshaft.
  • Eine Montage des Brückenstücks ist denkbar einfach. Somit sind die Fertigungskosten in der Großserienfertigung absenkbar. Dabei wird das Brückenstück mit seiner vorzugsweise einteilig daran verlaufenden Radialverlängerung voran über die abtriebsseitige Stirn des Gehäuses geführt und mit dessen Radialverlängerung in das respektive Fenster gesteckt. Anschließend erfolgt ein Schnappen/Rasten des Brückenstücks mit seiner der Radialverlängerung diametral gegenüberliegenden Seite über den vom Innenmantel des Gehäuses ausgehenden Vorsprung und ein Anlegen an Unterseiten von sich diametral im Gehäuse gegenüberliegenden Flachs.An assembly of the bridge piece is very simple. Thus, the production costs in mass production can be reduced. In this case, the bridge piece is performed with its preferably one piece extending thereon radial extension on the output side end of the housing and inserted with its radial extension in the respective window. Subsequently, a snapping / locking of the bridge piece takes place with its radial extension diametrically opposite side over the protruding from the inner surface of the housing projection and an application to lower sides of diametrically opposed in the housing flax.
  • Der vorgenannte Schnappvorsprung kann beispielsweise durch einen einfachen Stanz-Prägevorgang generiert werden. Gegebenenfalls kann auch eine separate Schnappnase appliziert werden. Außerdem ist es denkbar und vorgesehen mehrere umfangsverteilte Schnappvorsprünge anzuordnen.The aforementioned snap-in projection can be generated, for example, by a simple stamped-stamping process. Optionally, a separate snap-in nose can be applied. In addition, it is conceivable and intended to arrange a plurality of circumferentially distributed snap projections.
  • Die zuletzt genannten Flachs haben versteifende Funktion und dienen einer Anordnung eines Bolzens, auf welchem Bolzen eine gleit- oder wälzgelagerte Rolle als Kontaktpartner für den Nocken oder Exzenter verläuft.The latter flax have stiffening function and serve to arrange a bolt, on which bolt a sliding or roller bearing roller runs as a contact partner for the cam or eccentric.
  • Das Brückenstück mit dem fingerartigen Ansatz zur Darstellung der Verdrehsicherung kann aus Blechwerkstoff gestanzt, geprägt und gebogen werden. Ggf. sind auch alternative Werkstoffe wie Kunststoffe oder Verbundwerkstoffe denkbar und vorgesehen. Oberseiten des Brückenstücks, welche an Unterseiten der Flachs anliegen, folgen zweckmäßigerweise der Kontur der letztgenannten Unterseiten. So kann das Brückenstück geringfügig zylindrisch ausgebildet sein, was zudem einen Beitrag in Richtung Versteifung leistet.The bridge piece with the finger-like approach to the representation of the rotation can be stamped from sheet metal material, embossed and bent. Possibly. Alternative materials such as plastics or composites are conceivable and intended. Topsides of the bridge piece, which bear against undersides of the flax, expediently follow the contour of the last-mentioned undersides. Thus, the bridge piece may be slightly cylindrical, which also contributes to stiffening.
  • Die vom Brückenstück abstehende Verdrehsicherung kann, nach einem weiteren Vorschlag der Erfindung, an ihrer Stirnseite einer weiteren Behandlung unterzogen werden. So ist es vorgeschlagen, dem Führungsansatz eine größere Führungslänge dadurch zu verleihen, dass dieser stirnseitig gestaucht, gestreckt, gebogen, geprägt o. dgl. wird.The protruding from the bridge piece anti-rotation can, according to a further proposal of the invention, be subjected to further treatment on its front side. Thus, it is proposed to give the guide approach a greater guide length in that it is upset, stretched, bent, embossed or the like.
  • Ein weiterer Vorschlag bezieht sich darauf, in der Stirnseite der Radialverlängerung des Brückenstücks ein separates Bauteil wie einen Pin oder einen Rohrabschnitt zu befestigen. Letztgenannte Bauteile können beispielsweise durch Einpressen, Löten, Schweißen etc. mit dem Brückenstück verbunden werden und vergrößern ebenfalls die Führungslänge in der Nut bei Einbau.Another proposal relates to attaching a separate component such as a pin or a pipe section in the end face of the radial extension of the bridge piece. The latter components can be connected, for example by pressing, soldering, welding, etc. with the bridge piece and also increase the guide length in the groove during installation.
  • Ein weiter Unteranspruch bezieht sich schließlich darauf, dass das Gehäuse aus einem preiswerten Leichtbauwerkstoff wie Stahlblech beispielsweise tiefziehtechnisch hergestellt ist. Somit ist ein weiterer Beitrag in Richtung Absenkung der Kosten geleistet.A further subclaim finally refers to the fact that the housing is made of a low-cost lightweight construction material such as sheet steel, for example by deep drawing. Thus, another contribution is made in reducing the costs.
  • Kurze Beschreibung der ZeichnungShort description of the drawing
  • Die Erfindung ist zweckmäßigerweise anhand der Zeichnung näher erläutert. Es zeigen:
    • Figur 1 den erfindungsgemäßen Stößel in einer Explosivdarstellung;
    • Figur 2 den Stößel nach Figur 1 im Zusammenbau;
    • Figur 3 eine vergrößerte Ansicht auf den Innenmantel des Stößels im Bereich dessen Vorsprungs und
    • die Figuren 4 bis 7 das Brückenstück mit alternativen Gestaltungen dessen Radialverlängerung.
    The invention is suitably explained in more detail with reference to the drawing. Show it:
    • FIG. 1 the ram according to the invention in an exploded view;
    • FIG. 2 the plunger after FIG. 1 in the assembly;
    • FIG. 3 an enlarged view of the inner shell of the plunger in the region of the projection and
    • the FIGS. 4 to 7 the bridge piece with alternative designs of its radial extension.
  • Ausführliche Beschreibung der ZeichnungDetailed description of the drawing
  • Dargestellt ist ein Stößel 1, hier als Gegenläufer für einen Nocken einer Kraftstoffhochdruckpumpe. Der Stößel 1 besteht aus einem im Wesentlichen zylindrischen Gehäuse aus dünnwandigem Stahlblech, mit einer Abtriebsseite 3 und einer Antriebsseite 7. Das Gehäuse 2 ist an seiner Antriebsseite 7 durch eine antriebsseitige Stirn 17 begrenzt. Es hat zwei bis an diese Stirn 17 heranreichende und sich diametral gegenüberliegende Flachs 18. In jedem Flach 18 ist ein Lagerauge 19 appliziert. Wie die Figuren 1, 2 offenbaren, sitzt in den Lageraugen 19 endseitig ein Bolzen 20, auf dem eine wälzgelagerte Rolle 8 verläuft. Die Rolle 8 kommuniziert mit einem nicht gezeichneten Nocken einer Kraftstoffpumpe.Shown is a plunger 1, here as a counter-rotor for a cam of a high-pressure fuel pump. The plunger 1 consists of a substantially cylindrical housing made of thin-walled sheet steel, with a driven side 3 and a drive side 7. The housing 2 is limited on its drive side 7 by a drive-side end 17. It has two reaching to this forehead 17 and diametrically opposite flax 18. In each flat 18, a bearing eye 19 is applied. As the FIGS. 1, 2 reveal, sitting in the bearing lugs 19 at the end a bolt 20 on which a roller bearing roller 8 extends. The roller 8 communicates with a not shown cam of a fuel pump.
  • Zudem ist gezeigt, dass ein Innenmantel 5 des Gehäuses 2 von einem Brückenstück 6 durchragt ist. Das Brückenstück 6 ist als dünnwandiges Blechbauteil ausgebildet und hat eine fingerartige Radialverlängerung 12 zur Darstellung einer Verdrehsicherung 11.In addition, it is shown that an inner jacket 5 of the housing 2 is penetrated by a bridge piece 6. The bridge piece 6 is formed as a thin-walled sheet-metal component and has a finger-like radial extension 12 for representing a rotation 11.
  • Das Gehäuse 2 besitzt ein Fenster 9, durch welches die Radialverlängerung 12 des Brückenstücks 6 ragt. Dabei liegt das Brückenstück 6 einerseits in Richtung zur antriebsseitigen Stirn 17 an Unterseiten 16 der Flachs 18 an. Andererseits ist das Brückenstück 6 hinter einen vom Innenmantel 5 des Gehäuses 2 ausgehenden Vorsprung 15 mit einem Randbereich 14 eines der Radialverlängerung 12 gegenüberliegenden Abschnitts 13 geschnappt. Der wenigstens eine Vorsprung 15 ist beispielsweise durch eine Anstanzung/Anprägung dargestellt.The housing 2 has a window 9 through which the radial extension 12 of the bridge piece 6 protrudes. In this case, the bridge piece 6 is located on the one hand in the direction of the drive-side end 17 on lower sides 16 of the flax 18. On the other hand, the bridge piece 6 is snapped behind a protruding from the inner shell 5 of the housing 2 projection 15 with an edge portion 14 of the radial extension 12 opposite portion 13. The at least one projection 15 is represented for example by a punched / embossed.
  • Es liegt auf der Hand, dass durch die einteilige Verbindung der Radialverlängerung 12 mit dem Brückenstück 6 zur Darstellung der Verdrehsicherung 11 und durch die gleichzeitig einfache axiale Fixierung des Brückenstücks 6 am Vorsprung 15 sowie an den Unterseiten 16 der Flachs 18 ein kostengünstiger Stößel 1 geschaffen ist. Durch den Fenstereingriff des Brückenstücks 6 und dessen Lagerung auf dem Vorsprung 15 ist eine sehr einfache Verliersicherung für das Brückenstück 6 geschaffen. Zudem ist der Stößel 1 hinsichtlich seiner Bauteilezahl gegenüber Stößeln nach dem Stand der Technik reduziert.It is obvious that a cost effective plunger 1 is created by the one-piece connection of the radial extension 12 with the bridge piece 6 to represent the rotation 11 and by the same simple axial fixation of the bridge piece 6 on the projection 15 and on the undersides 16 of the flax 18 , Through the window engagement of the bridge piece 6 and its storage on the projection 15 a very simple captive for the bridge piece 6 is created. In addition, the plunger 1 is reduced in terms of its number of components compared to plungers according to the prior art.
  • Die Figuren 4 bis 7 zeigen spezielle Ausgestaltungen einer Außenstirn 21 der Radialverlängerung 12. So kann nach Figur 4 die Außenstirn 21 beispielsweise angestaucht sein, so dass eine größere Führungslänge gegeben ist. Gemäß der Ausgestaltung nach Figur 5 ist es vorgesehen, ein separates Einsatzteil 23 an der Außenstirn 21 zu befestigen. Auch kann gemäß Figur 6 die Kontaktfläche zur Führungsnut im Umgebungsmaterial durch einen Abstreckvorgang oder nach Figur 7 durch Abwinkeln vergrößert werden.The FIGS. 4 to 7 show special embodiments of an outer end 21 of the radial extension 12. So can after FIG. 4 the outer end 21 may be upset, for example, so that a larger guide length is given. According to the embodiment according to FIG. 5 it is provided to attach a separate insert part 23 to the outer end 21. Also, according to FIG. 6 the contact surface with the guide groove in the surrounding material by an ironing or after FIG. 7 be increased by bending.
  • Liste der BezugszahlenList of reference numbers
    • 1) Stößel1) plunger
    • 2) Gehäuse2) housing
    • 3) Abtriebsseite3) output side
    • 4) Unterseite4) bottom
    • 5) Innenmantel5) inner jacket
    • 6) Brückenstück6) Bridge piece
    • 7) Antriebsseite7) Drive side
    • 8) Rolle8) role
    • 9) Fenster9) windows
    • 10)Außenmantel10) outer shell
    • 11)Verdrehsicherung11) anti-rotation
    • 12)Radialverlängerung12) the radial extension
    • 13)Abschnitt13) section
    • 14)Randbereich14) the edge area
    • 15)Vorsprung15) projection
    • 16)Unterseite16) Base
    • 17)antriebsseitige Stirn17) drive-side forehead
    • 18)Flach18) flat
    • 19)Lagerauge19) bearing eye
    • 20)Bolzen20) pin
    • 20a)Oberseite20a) top
    • 21)Außenstirn21) outer end
    • 22)Führungsansatz22) guide projection
    • 23)Einsatzteil23) the insert part

Claims (9)

  1. Tappet (1), suitable either for a high-pressure fuel pump or for a valve train of a quality-controlled or quantity-controlled internal combustion engine, having a housing (2), to the drive side (7) of which, which serves as a cam or eccentric run-on means, a roller (8) or sliding face is intrinsic, the output side (3) of which housing (2), which serves as a bearing means of a tappet follower part, lies on an underside (4) of a bridge piece (6) which penetrates an inner shell (5) of the housing (2), an anti-rotation safeguard (11) which projects beyond the outer shell (10) of the housing (2) and is formed from a radial extension of the bridge piece (6) running in a window (9) of the said housing (2), characterized in that a projection (15) which is attached in one piece and rises in a wedge-like manner in the direction of the drive side runs on the inner shell (5) of the tappet (1), only on a section which lies diametrically opposite the window (9), the bridge piece (6) which consists of steel sheet being snapped over the projection (15) by way of a section (13) which lies diametrically opposite the radial extension (12), and lies on the said projection (15) by way of an end region (14) of its underside (4).
  2. Tappet according to Claim 1, characterized in that the bridge piece (6) bears in the direction of the drive side (7) against undersides (16) of flats (18) which are made in the outer shell (10) of the housing (2), lie diametrically opposite one another, and emanate from a drive-side front (17) of the housing (2), each flat (18) having a bearing socket (19), in which bearing sockets (19) a pin (20) is received for anti-friction or plain mounting of the roller (8).
  3. Tappet according to Claim 2, characterized in that the undersides (16) of the flats (18) are present in the manner of a half shell on the inner shell (5) of the housing (2), an upper side (20a) of the bridge piece (6) being complementary with respect to the flats (18), at least in the section of the undersides (16) of the said flats (18).
  4. Tappet according to Claim 1, characterized in that the radial extension (12) is present in a finger-like manner, is connected in one piece to the bridge piece (6), and merges on its outer front (21) into a guide attachment (22) which projects perpendicularly on one side or both sides.
  5. Tappet according to Claim 1 or 4, characterized in that the radial extension (12) is provided on its outer front (21) with a separate insert part (23), such as an upright pin or a small tube.
  6. Method for producing a tappet according to Claim 5, characterized in that the separate insert part (23) is connected to the outer front (21) by way of a method such as pressing, welding, adhesive bonding or brazing.
  7. Method for producing a tappet according to Claim 4, characterized in that the guide attachment is produced by way of a manufacturing method, such as upsetting, stamping/wall ironing or by way of folding.
  8. Method for producing a tappet according to Claim 1, characterized in that the housing (2) is either deep-drawn from sheet metal or is produced using extrusion technology.
  9. Method for producing a tappet according to Claim 1, characterized in that the projection (15) is produced by way of a stamping and forming operation.
EP10709711.5A 2009-03-13 2010-03-04 Tappet Active EP2406494B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102009013130A DE102009013130A1 (en) 2009-03-13 2009-03-13 tappet
PCT/EP2010/052742 WO2010102942A1 (en) 2009-03-13 2010-03-04 Tappet

Publications (2)

Publication Number Publication Date
EP2406494A1 EP2406494A1 (en) 2012-01-18
EP2406494B1 true EP2406494B1 (en) 2018-01-10

Family

ID=42199858

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Application Number Title Priority Date Filing Date
EP10709711.5A Active EP2406494B1 (en) 2009-03-13 2010-03-04 Tappet

Country Status (7)

Country Link
US (1) US8474427B2 (en)
EP (1) EP2406494B1 (en)
JP (1) JP2012520408A (en)
KR (1) KR101741852B1 (en)
CN (1) CN102348894B (en)
DE (1) DE102009013130A1 (en)
WO (1) WO2010102942A1 (en)

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DE202018004604U1 (en) 2018-10-04 2018-11-08 Schaeffler Technologies AG & Co. KG Pump tappet for a high-pressure fuel pump
DE102019102289B3 (en) * 2019-01-30 2020-03-05 Schaeffler Technologies AG & Co. KG Roller plunger for a fuel pump

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DE102011003245A1 (en) * 2011-01-27 2012-08-02 Schaeffler Technologies Gmbh & Co. Kg Cup tappet for acting on a pump piston of a high-pressure fuel pump
USD701243S1 (en) 2011-12-13 2014-03-18 Eaton Corporation Pump actuator anti-rotation device
DE102012211113A1 (en) * 2012-06-28 2014-01-02 Schaeffler Technologies AG & Co. KG tappet
DE102012214136A1 (en) * 2012-08-09 2014-02-13 Schaeffler Technologies AG & Co. KG roller plunger
DE102012217801A1 (en) * 2012-09-28 2014-04-03 Schaeffler Technologies Gmbh & Co. Kg Method for assembling a ram
FR2998629B1 (en) * 2012-11-29 2015-07-03 Skf Ab FOLLOWING ROLL DEVICE OF A CAM
EP2937566B1 (en) * 2014-04-22 2016-10-19 Aktiebolaget SKF Cam follower roller device, notably for a fuel injection pump
CN104279014B (en) * 2014-08-04 2018-04-27 武汉东方骏驰精密制造有限公司 New anti-rotation roller lifts tappet
FR3030665B1 (en) * 2014-12-17 2017-10-20 Poclain Hydraulics Ind MONOBLOCK ROLLER PISTON AND METHOD THEREOF
WO2016175975A1 (en) 2015-04-28 2016-11-03 Cummins Inc. Pinless tappet in a common rail high pressure fuel pump
US10024286B2 (en) 2015-07-15 2018-07-17 GT Technologies Tappet assembly for use in an internal combustion engine high-pressure fuel system
US10119607B2 (en) 2016-04-15 2018-11-06 Koyo Bearings North America Llc Follower mechanism
US9863382B2 (en) * 2016-05-25 2018-01-09 Hangzhou Xzb Tech Co., Ltd High pressure oil pump roller tappet
DE102016220205A1 (en) 2016-10-17 2018-04-19 Schaeffler Technologies AG & Co. KG tappet
WO2018140403A1 (en) * 2017-01-27 2018-08-02 Eaton Corporation Pump actuator with stamp-aligned anti-rotation feature
DE102017105978B3 (en) 2017-03-21 2018-06-21 Schaeffler Technologies AG & Co. KG Roller tappet for a fuel pump
DE102017129430A1 (en) 2017-12-11 2019-06-13 Schaeffler Technologies AG & Co. KG Plunger of a high-pressure fuel pump or a valve train of an internal combustion engine
US10697413B2 (en) * 2018-06-04 2020-06-30 GT Technologies Tappet assembly for use in a high-pressure fuel system of an internal combustion engine
US10837416B2 (en) * 2018-06-04 2020-11-17 GT Technologies Tappet assembly for use in a high-pressure fuel system of an internal combustion engine
US10941737B2 (en) * 2019-01-14 2021-03-09 Koyo Bearings North America Llc Follower mechanism with anti-rotation feature

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DE102009013132A1 (en) * 2009-03-13 2010-09-16 Schaeffler Technologies Gmbh & Co. Kg tappet

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Publication number Priority date Publication date Assignee Title
DE202018004604U1 (en) 2018-10-04 2018-11-08 Schaeffler Technologies AG & Co. KG Pump tappet for a high-pressure fuel pump
DE102019102289B3 (en) * 2019-01-30 2020-03-05 Schaeffler Technologies AG & Co. KG Roller plunger for a fuel pump
WO2020156602A1 (en) 2019-01-30 2020-08-06 Schaeffler Technologies AG & Co. KG Roller tappet for a fuel pump

Also Published As

Publication number Publication date
DE102009013130A1 (en) 2010-09-16
US8474427B2 (en) 2013-07-02
EP2406494A1 (en) 2012-01-18
US20110265752A1 (en) 2011-11-03
CN102348894A (en) 2012-02-08
JP2012520408A (en) 2012-09-06
WO2010102942A1 (en) 2010-09-16
KR101741852B1 (en) 2017-05-30
CN102348894B (en) 2016-01-27
KR20110126140A (en) 2011-11-22

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