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EP2951435A1 - Plunger - Google Patents

Plunger

Info

Publication number
EP2951435A1
EP2951435A1 EP13823929.8A EP13823929A EP2951435A1 EP 2951435 A1 EP2951435 A1 EP 2951435A1 EP 13823929 A EP13823929 A EP 13823929A EP 2951435 A1 EP2951435 A1 EP 2951435A1
Authority
EP
European Patent Office
Prior art keywords
housing
bridge piece
plunger
ring
output
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.)
Granted
Application number
EP13823929.8A
Other languages
German (de)
French (fr)
Other versions
EP2951435B1 (en
Inventor
Norbert Geyer
Stefan Dorn
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 EP2951435A1 publication Critical patent/EP2951435A1/en
Application granted granted Critical
Publication of EP2951435B1 publication Critical patent/EP2951435B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps 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
    • F02M59/10—Pumps 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
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0408—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0435—Arrangements for disconnecting the pistons from the actuated cam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0439—Supporting or guiding means for the pistons

Definitions

  • the invention relates to a plunger, in particular for a pump or a compressor, with a tube-like housing, in whose drive-side annular end are two diametrically opposed by an outer shell of the housing flax, in which a roll carrying a bolt is mounted, wherein an inner shell of the Housing, axially below the roller, is penetrated by a separate bridge piece whose output side end acts as a plant for a follower part and which bridge piece in the direction of the drive side annular end abuts the underside of the flax and fixed in the direction of a driven side annular end of the housing by a on the inner shell Ring is held.
  • Such a plunger is apparent from DE 10201221 1 1 13.1. It is suitable for acting on a pump piston of a fuel injection pump. As can be seen from Figure 1, a holder of the bridge piece takes place axially out of the housing via a snap ring, which is held on the housing radially projecting lugs.
  • the disadvantage is that an assembly of the bridge piece on the drive-side annular end must be very targeted and accurate, so as not to come into collision with the noses. Furthermore, limited by the projecting components (lugs, snap ring) of the radial space in the lower housing area, so that under certain circumstances not enough space for a on the output side end of the bridge piece supporting return spring o. The like. Is given.
  • the noses also weaken the case. Possibly. it comes in their area to distortion on the outer surface of the housing.
  • the plunger should be easy to assemble and an enlarged space below its bridge piece have.
  • the ring is a broken spring band and in a complementary groove of the inner shell of the housing, in this radially not or only slightly protruding from the groove, sitting, from a top of the ring at least two tabs radially inwardly stand out on soft the bridge piece is fixed in the direction of the output side annular end.
  • the ring is intended for a sheet metal or plastic ring. Possibly. can be applied in the separating gap and a spring spreading the ring spring means.
  • the space below the bridge piece thus in the direction of the output side annular end of the housing, is designed so that no noses o. The like. More radially extend from the inner surface of the housing. However, necessary chamfers are not covered.
  • the bridge piece can first be fed relatively freely to the housing (i.i., head-over-assembly) until its twist orientation becomes necessary for engagement with the bottoms of the flax. It is more important in this context, however, that the unrestricted space larger return springs can be installed so that higher forces / speeds are possible.
  • a preferred development of the invention relates to a plunger, which is connected to a pump piston via a spring plate.
  • a plunger which is connected to a pump piston via a spring plate.
  • the tabs of the ring advantageously in a complementary annular recess of a ring portion of the spring plate. The latter holds the ring during operation of the ram.
  • the spring plate from its outer edge outgoing breakthroughs. These allow a good passage of, for example, diesel fuel / lubricant or prevent a "pumping" of the plunger.
  • the breakthroughs can also outside the Be introduced outside. In addition, you help to save ram mass.
  • Punched bridge piece allows passage to eg. Diesel fuel / lubricant side of the bridge piece along and good handling and easy assembly of the bridge piece in mass production.
  • a nose of the bridge piece protrude from a crosspiece, which may alternatively also be present as a separate component.
  • the nose is guided through an example. Stamped opening of the housing, so that the plunger has a simple design and captive anti-rotation.
  • the bridge piece is available as a multifunction part.
  • Crossstones of the bridge piece have according to the claims a smoothened to the inner surface of the housing course, which comes to a simple assembly and helps to avoid edge contact compared to a bow-like design.
  • the bridge piece as sheet metal stamping with a comparatively large thickness. This measure helps to keep manufacturing costs low. Possibly.
  • the bridge piece can also be flared or urgeformt.
  • the proposed tappet should be used for at least indirectly acting on a pump piston of a fuel injection pump of a quality- or quantity-controlled internal combustion engine use.
  • a valve train of an internal combustion engine in an axial or radial piston compressor or in a respective pump is considered.
  • FIG. 1 shows a longitudinal section through a ram assembly
  • Figure 2 shows a longitudinal section as mentioned above, but rotated by 90 ° about the axial line;
  • FIG. 3 shows a bottom view according to FIG. 2;
  • FIG. 4 shows an enlarged partial view of the unit according to FIG. 1 in the section of the bridge piece
  • Figure 5 shows a three-dimensional view of the ring with tabs
  • Figure 6 shows a three-dimensional view of the housing of the plunger from below
  • FIG. 7 shows the plunger according to FIG. 6 in the assembled state.
  • a plunger 1 for a high-pressure fuel pump This consists (see Fig. 1, 2, 6, 7) of a thin-walled housing 2 made of sheet steel.
  • a drive-side annular end face 3 of the housing 2 two flanges 5, which are engaged by an outer jacket 4 of the housing 2, lie diametrically opposite one another, which can be clearly seen in FIG.
  • a roller 6 bearing bolt 7 In the flax 5 a roller 6 bearing bolt 7 is mounted.
  • An inner jacket 8 of the housing 2 is projected axially below the roller 6 from a separate bar-like bridge piece 9 (see FIGS. 1, 2, 7), with its output side end 10 in contact with a ram follower part 1 1 designed as a pump piston.
  • the bridge piece 9 lies in the direction of the drive-side annular end face 3 on lower sides 12 of the flax 5 (see FIGS. 1, 7).
  • a driven-side annular end 13 of the housing 2 whose play-free mounting is effected by a ring 14 fixed to the inner casing 8 (see also Fig. 5), which is a broken spring band.
  • the ring 14 is seated in a circumferential groove 15 of the inner shell 8 of the housing 2 and does not protrude into the plunger interior.
  • pump piston 1 1 is held by a spring plate 18 made of sheet metal on the output-side end 10 of the bridge piece 9 so that the pump piston 1 1 relative to the plunger 1 can perform a lateral evasive movement.
  • the spring plate 18 rests against the output-side end 10 of the bridge piece 9 with a ring region 20 extending from its outer edge 19 (see FIG. 4).
  • the aforementioned bent tabs 17 sit in a ring recess 20 in a top 21 of the annular portion 20 of the spring plate 18th
  • Figure 3 also shows that the spring plate 18, starting from the outer edge 22, provided with openings 23 for a media passage (oil, fuel).
  • a media passage oil, fuel
  • Fig. 7 protrudes from a cross-beam 24 of the bridge piece 9, a nose 25 away.
  • This extends through a shirt recess 27 in the housing 2 and serves to prevent rotation of the plunger 1 with respect to its leadership in the fuel pump.
  • the shirt recess 27 is based on an upper crossbar 28 of a window 29 in the housing 2, which window 29 is formed by one of the indented flax 5 in the housing 2.
  • Both transverse stems 24, 26 of the bridge piece 9 are, as can be seen from Figure 7, with a radius of the inner jacket 8 of the housing 2 provided similar radius and extend immediately in front of the inner shell 8 of the housing. 2

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The invention relates to a plunger (1) for a fuel injection pump, comprising a housing (2) that has a drive-side annular end face (3) at which two flat sections (5), recessed in relation to an outer shell (4) of the housing (2), lie diametrically opposite one another, a bolt (7) that supports a roller (6) being mounted in said sections. A separate bridge section (9) protrudes through an inner shell (8) of the housing (2), axially below said roller (6), and the output-side end face (10) of said bridge section acts as a contact point for a plunger follower part (11), the bridge section (9) lying against undersides (12) of said flat sections (5) in the direction of the drive-side annular end face (3) and being held, in the direction of an output-side annular end face (13) of said housing (2), by a ring (14) that is fixed to the inner shell (8), is a spring-loaded spring clip, and sits in a complementary groove (15) of the inner shell (8) of the housing (2) so as not to protrude radially out of said groove (15), at least two tabs (17) projecting radially inwards from an upper side (16) of the ring (14), and the bridge section (9) being fixed thereupon in the direction of the output-side annular end face (3).

Description

Stößel  tappet
Die Erfindung betrifft einen Stößel, insbesondere für eine Pumpe oder einen Verdichter, mit einem rohrähnlichen Gehäuse, bei dessen antriebsseitiger Ringstirn sich zwei von einem Außenmantel des Gehäuses eingerückte Flachs diametral gegenüber liegen, in denen ein eine Rolle tragender Bolzen gelagert ist, wobei ein Innenmantel des Gehäuses, axial unterhalb der Rolle, von einem separaten Brückenstück durchragt ist, dessen abtriebsseitige Stirn als Anlage für ein Stößelfolgeteil fungiert und welches Brückenstück in Richtung zur antriebsseitigen Ringstirn an Unterseiten der Flachs anliegt sowie in Richtung zu einer abtriebsseitigen Ringstirn des Gehäuses durch einen am Innenmantel fixierten Ring gehalten ist. The invention relates to a plunger, in particular for a pump or a compressor, with a tube-like housing, in whose drive-side annular end are two diametrically opposed by an outer shell of the housing flax, in which a roll carrying a bolt is mounted, wherein an inner shell of the Housing, axially below the roller, is penetrated by a separate bridge piece whose output side end acts as a plant for a follower part and which bridge piece in the direction of the drive side annular end abuts the underside of the flax and fixed in the direction of a driven side annular end of the housing by a on the inner shell Ring is held.
Ein derartiger Stößel geht aus der DE 10201221 1 1 13.1 hervor. Er ist für eine Beaufschlagung eines Pumpenkolbens einer Kraftstoffeinspritzpumpe geeignet. Wie aus Figur 1 zu entnehmen ist, erfolgt eine Halterung des Brückenstücks axial aus dem Gehäuse heraus über einen Sprengring, der an vom Gehäuse radial einragenden Nasen gehalten ist. Such a plunger is apparent from DE 10201221 1 1 13.1. It is suitable for acting on a pump piston of a fuel injection pump. As can be seen from Figure 1, a holder of the bridge piece takes place axially out of the housing via a snap ring, which is held on the housing radially projecting lugs.
Nachteilig ist, dass eine Montage des Brückenstücks über die antriebsseitige Ringstirn sehr gezielt und genau erfolgen muss, um nicht in Kollision mit den Nasen zu kommen. Des Weiteren ist durch die einragenden Bauteile (Nasen, Sprengring) der radiale Bauraum im unteren Gehäusebereich eingeschränkt, so dass unter Umständen nicht ausreichend Bauraum für eine sich an der abtriebsseitigen Stirn des Brückenstücks abstützende Rückstellfeder o. dgl. gegeben ist. Die Nasen schwächen zudem das Gehäuse. Ggf. kommt es in deren Bereich zu Verzug am Außenmantel des Gehäuses. The disadvantage is that an assembly of the bridge piece on the drive-side annular end must be very targeted and accurate, so as not to come into collision with the noses. Furthermore, limited by the projecting components (lugs, snap ring) of the radial space in the lower housing area, so that under certain circumstances not enough space for a on the output side end of the bridge piece supporting return spring o. The like. Is given. The noses also weaken the case. Possibly. it comes in their area to distortion on the outer surface of the housing.
Es ist daher Aufgabe der Erfindung, einen Stößel ohne die aufgezeigten Nachteile zu schaffen. Insbesondere soll sich der Stößel leicht montieren lassen und einen vergrößerten Bauraum unterhalb seines Brückenstücks besitzen. It is therefore an object of the invention to provide a plunger without the disadvantages mentioned. In particular, the plunger should be easy to assemble and an enlarged space below its bridge piece have.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass der Ring ein gesprengtes Federband ist und in einer komplementären Nut des Innenmantels des Gehäuses, in dieses radial nicht oder nur geringfügig aus der Nut einragend, sitzt, wobei von einer Oberseite des Rings zumindest zwei Laschen radial nach innen abstehen, auf weichen das Brückenstück in Richtung zu der abtriebsseitigen Ringstirn fixiert ist. According to the invention this object is achieved in that the ring is a broken spring band and in a complementary groove of the inner shell of the housing, in this radially not or only slightly protruding from the groove, sitting, from a top of the ring at least two tabs radially inwardly stand out on soft the bridge piece is fixed in the direction of the output side annular end.
Somit liegt ein Stößel ohne die vorbeschriebenen Nachteile vor. Als Ring ist an einen Blech- oder Kunststoffring gedacht. Ggf. kann im Trennspalt auch ein den Ring aufspreizendes Federmittel appliziert sein. Der Bauraum unterhalb des Brückenstücks, demnach in Richtung zur abtriebsseitigen Ringstirn des Gehäuses, ist so gestaltet, dass keine Nasen o. dgl. mehr radial vom Innenmantel des Gehäuses ausgehen. Notwendige Fasen sind hiervon jedoch nicht erfasst. Somit kann das Brückenstück zunächst relativ frei dem Gehäuse zugeführt werden (i. d. R. Kopfübermontage), bis dessen Verdrehorientierung zur Anlage an den Unterseiten der Flachs notwendig wird. Wichtiger ist es in diesem Kontext jedoch, dass durch den uneingeschränkten Bauraum größere Rückstellfedern eingebaut werden können, so dass höhere Kräfte / Drehzahlen ermöglicht sind. Thus, there is a plunger without the disadvantages described above. The ring is intended for a sheet metal or plastic ring. Possibly. can be applied in the separating gap and a spring spreading the ring spring means. The space below the bridge piece, thus in the direction of the output side annular end of the housing, is designed so that no noses o. The like. More radially extend from the inner surface of the housing. However, necessary chamfers are not covered. Thus, the bridge piece can first be fed relatively freely to the housing (i.i., head-over-assembly) until its twist orientation becomes necessary for engagement with the bottoms of the flax. It is more important in this context, however, that the unrestricted space larger return springs can be installed so that higher forces / speeds are possible.
Eine bevorzugte Fortbildung der Erfindung betrifft einen Stößel, welcher mit einem Pumpenkolben über einen Federteller verbunden ist. Zur Realisierung des freien Bauraums unterhalb vom Brückenstück verlaufen die Laschen des Rings vorteilhafterweise in einer komplementären Ringaussparung eines Ringbereichs des Federtellers. Letztgenannter hält den Ring während eines Betriebs des Stößels. A preferred development of the invention relates to a plunger, which is connected to a pump piston via a spring plate. To realize the free space below the bridge piece extend the tabs of the ring advantageously in a complementary annular recess of a ring portion of the spring plate. The latter holds the ring during operation of the ram.
Nach einer weiteren Konkretisierung der Erfindung hat der Federteller von seinem Außenrand ausgehende Durchbrüche. Diese gestatten einen guten Durchtritt von bspw. Dieselkraftstoff / Schmiermittel oder verhindern ein „Aufpumpen" des Stößels. Die Durchbrüche können auch außerhalb vom Außenrand eingebracht sein. Zudem helfen Sie, Stößelmasse zu sparen. After a further concretization of the invention, the spring plate from its outer edge outgoing breakthroughs. These allow a good passage of, for example, diesel fuel / lubricant or prevent a "pumping" of the plunger.The breakthroughs can also outside the Be introduced outside. In addition, you help to save ram mass.
Die in einem weiteren Unteranspruch vorgeschlagene balkenförmige Gestaltung des bspw. gestanzten Brückenstücks gestattet einen Durchtritt an bspw. Dieselkraftstoff / Schmiermittel seitlich am Brückenstück entlang sowie ein gutes Handling und eine einfache Montage des Brückenstücks in Massenfertigung. The proposed in a further dependent claim bar-shaped design of the example. Punched bridge piece allows passage to eg. Diesel fuel / lubricant side of the bridge piece along and good handling and easy assembly of the bridge piece in mass production.
Gleichzeitig ist es vorgesehen, von einer Querstirn des Brückenstücks eine Nase abragen zu lassen, die alternativ auch als separates Bauteil vorliegen kann. Die Nase ist durch eine bspw. gestanzte Öffnung des Gehäuses geführt, so dass der Stößel eine einfach aufgebaute und verliersichere Verdrehsicherung hat. Somit liegt das Brückenstück als Multifunktionsteil vor. At the same time, it is provided to allow a nose of the bridge piece to protrude from a crosspiece, which may alternatively also be present as a separate component. The nose is guided through an example. Stamped opening of the housing, so that the plunger has a simple design and captive anti-rotation. Thus, the bridge piece is available as a multifunction part.
Querstirnen des Brückenstücks haben anspruchsgemäß einen an den Innenmantel des Gehäuses angeschmiegten Verlauf, was einer einfachen Montage entgegen kommt und hilft, im Vergleich zu einer bogensehnartigen Gestaltung, Kantenkontakt zu vermeiden. Crossstones of the bridge piece have according to the claims a smoothened to the inner surface of the housing course, which comes to a simple assembly and helps to avoid edge contact compared to a bow-like design.
Zudem ist es vorgesehen, das Brückenstück über die Nasen des Rings zumindest axial spielfrei im Stößel zu verspannen. Es ist somit klapperfrei fixiert. In addition, it is provided to clamp the bridge piece over the lugs of the ring at least axially free of play in the plunger. It is thus fixed rattle-free.
Schließlich ist es vorgeschlagen, das Brückenstück als Blechstanzteil mit vergleichsweise großer Dicke auszubilden. Diese Maßnahme hilft, die Fertigungskosten gering zu halten. Ggf. kann das Brückenstück auch gespant oder urgeformt sein. Finally, it is proposed to form the bridge piece as sheet metal stamping with a comparatively large thickness. This measure helps to keep manufacturing costs low. Possibly. The bridge piece can also be flared or urgeformt.
Der vorschlagsgemäße Stößel soll zur wenigstens mittelbaren Beaufschlagung eines Pumpenkolbens einer Kraftstoffeinspritzpumpe einer qualitäts- oder quantitätsgesteuerten Brennkraftmaschine Verwendung finden. Gleichermaßen kommt ein Einsatz in einem Ventiltrieb einer Brennkraftmaschine, in einem Axial- oder Radialkolbenverdichter oder in einer respektiven -pumpe infrage. Zur Zeichnung: The proposed tappet should be used for at least indirectly acting on a pump piston of a fuel injection pump of a quality- or quantity-controlled internal combustion engine use. Likewise, use in a valve train of an internal combustion engine, in an axial or radial piston compressor or in a respective pump is considered. To the drawing:
• Figur 1 zeigt einen Längsschnitt durch eine Stößelbaueinheit;  FIG. 1 shows a longitudinal section through a ram assembly;
• Figur 2 zeigt einen Längsschnitt wie vorgenannt, jedoch um 90° um die Axiallinie gedreht; Figure 2 shows a longitudinal section as mentioned above, but rotated by 90 ° about the axial line;
• Figur 3 zeigt eine Unteransicht nach Figur 2; FIG. 3 shows a bottom view according to FIG. 2;
• Figur 4 zeigt eine vergrößerte Teilansicht der Einheit nach Figur 1 im Abschnitt des Brückenstücks; FIG. 4 shows an enlarged partial view of the unit according to FIG. 1 in the section of the bridge piece;
• Figur 5 zeigt eine räumliche Ansicht des Rings mit Laschen; Figure 5 shows a three-dimensional view of the ring with tabs;
• Figur 6 zeigt eine räumliche Ansicht des Gehäuses des Stößels von unten und Figure 6 shows a three-dimensional view of the housing of the plunger from below and
• Figur 7 zeigt den Stößel nach Figur 6 im zusammengebauten Zustand. FIG. 7 shows the plunger according to FIG. 6 in the assembled state.
Dargestellt ist ein Stößel 1 für eine Kraftstoffhochdruckpumpe. Dieser besteht (s. Fig. 1 , 2, 6, 7) aus einem dünnwandigen Gehäuse 2 aus Stahlblech. Bei einer antriebsseitigen Ringstirn 3 des Gehäuses 2 liegen sich zwei von einem Außenmantel 4 des Gehäuses 2 eingerückte Flachs 5 diametral gegenüber, die gut aus Fig. 6 erkennbar sind. In den Flachs 5 ist ein eine Rolle 6 tragender Bolzen 7 gelagert. Shown is a plunger 1 for a high-pressure fuel pump. This consists (see Fig. 1, 2, 6, 7) of a thin-walled housing 2 made of sheet steel. In a drive-side annular end face 3 of the housing 2, two flanges 5, which are engaged by an outer jacket 4 of the housing 2, lie diametrically opposite one another, which can be clearly seen in FIG. In the flax 5 a roller 6 bearing bolt 7 is mounted.
Ein Innenmantel 8 des Gehäuses 2 ist axial unterhalb der Rolle 6 von einem separaten, balkenartigen Brückenstück 9 durchragt (s. Fig. 1 , 2, 7), mit dessen abtriebsseitiger Stirn 10 ein als Pumpenkolben ausgebildetes Stößelfolgeteil 1 1 in Kontakt ist. Wie zu erkennen ist, liegt das Brückenstück 9 in Richtung zur antriebsseitigen Ringstirn 3 an Unterseiten 12 der Flachs 5 an (s. Fig. 1 , 7). In Richtung zu einer abtriebsseitigen Ringstirn 13 des Gehäuses 2 erfolgt dessen spielfreie Halterung durch einen am Innenmantel 8 fixierten Ring 14 (s. a. Fig. 5), welcher ein gesprengtes Federband ist. Der Ring 14 sitzt in einer umlaufenden Nut 15 des Innenmantels 8 des Gehäuses 2 und ragt nicht in den Stößelinnenraum hinein. An inner jacket 8 of the housing 2 is projected axially below the roller 6 from a separate bar-like bridge piece 9 (see FIGS. 1, 2, 7), with its output side end 10 in contact with a ram follower part 1 1 designed as a pump piston. As can be seen, the bridge piece 9 lies in the direction of the drive-side annular end face 3 on lower sides 12 of the flax 5 (see FIGS. 1, 7). In Direction to a driven-side annular end 13 of the housing 2 whose play-free mounting is effected by a ring 14 fixed to the inner casing 8 (see also Fig. 5), which is a broken spring band. The ring 14 is seated in a circumferential groove 15 of the inner shell 8 of the housing 2 and does not protrude into the plunger interior.
Von einer Oberseite 16 des Rings 14 stehen zwei sich diametral gegenüber liegende Laschen 17 radial nach innen ab. Auf diesen ist das Brückenstück 9 in Richtung zu der abtriebsseitigen Ringstirn 3 fixiert. From a top 16 of the ring 14 are two diametrically opposed tabs 17 radially inwardly from. In this bridge piece 9 is fixed in the direction of the driven-side annular end 3.
Der aus den Figuren 1 - 3 hervorgehende Pumpenkolben 1 1 ist durch einen Federteller 18 aus Blech an der abtriebsseitigen Stirn 10 des Brückenstücks 9 so gehalten, dass der Pumpenkolben 1 1 relativ zum Stößel 1 eine seitliche Ausweichbewegung vollziehen kann. Dabei liegt der Federteller 18 mit einem von seinem Außenrand 19 ausgehenden Ringbereich 20 an der abtriebsseitigen Stirn 10 des Brückenstücks 9 an (s. a. Fig. 4). Die vorgenannten abgebogenen Laschen 17 sitzen dabei in einer Ringaussparung 20 in einer Oberseite 21 des Ringbereichs 20 des Federtellers 18. The resulting from the figures 1-3 pump piston 1 1 is held by a spring plate 18 made of sheet metal on the output-side end 10 of the bridge piece 9 so that the pump piston 1 1 relative to the plunger 1 can perform a lateral evasive movement. In this case, the spring plate 18 rests against the output-side end 10 of the bridge piece 9 with a ring region 20 extending from its outer edge 19 (see FIG. 4). The aforementioned bent tabs 17 sit in a ring recess 20 in a top 21 of the annular portion 20 of the spring plate 18th
Figur 3 zeigt zudem, dass der Federteller 18, ausgehend von dessen Außenrand 22, mit Durchbrüchen 23 für einen Mediendurchtritt (Öl, Kraftstoff) versehen ist. Figure 3 also shows that the spring plate 18, starting from the outer edge 22, provided with openings 23 for a media passage (oil, fuel).
Wie gut aus Fig. 7 i. V. mit Fig. 1 hervorgeht, ragt von einer Querstirn 24 des Brückenstücks 9 eine Nase 25 weg. Diese erstreckt sich durch eine Hemdaussparung 27 im Gehäuse 2 und dient als Verdrehsicherung für den Stößel 1 gegenüber dessen Führung in der Kraftstoffpumpe. Die Hemdaussparung 27 geht von einem oberen Querbalken 28 eines Fensters 29 im Gehäuse 2 aus, welches Fenster 29 durch eines der eingerückten Flachs 5 im Gehäuse 2 gebildet ist. As well from Fig. 7 i. V. with Fig. 1, protrudes from a cross-beam 24 of the bridge piece 9, a nose 25 away. This extends through a shirt recess 27 in the housing 2 and serves to prevent rotation of the plunger 1 with respect to its leadership in the fuel pump. The shirt recess 27 is based on an upper crossbar 28 of a window 29 in the housing 2, which window 29 is formed by one of the indented flax 5 in the housing 2.
Beide Querstirnen 24, 26 des Brückenstücks 9 sind, wie aus Figur 7 zu entnehmen ist, mit einem zu einem Radius des Innenmantels 8 des Gehäuses 2 ähnlichen Radius versehen und verlaufen unmittelbar vor dem Innenmantel 8 des Gehäuses 2. Both transverse stems 24, 26 of the bridge piece 9 are, as can be seen from Figure 7, with a radius of the inner jacket 8 of the housing 2 provided similar radius and extend immediately in front of the inner shell 8 of the housing. 2
Liste der Bezugszahlen ) StößelList of reference numbers) Plunger
) Gehäuse) Casing
) antriebsseitige Ringstirn) drive-side annular end
) Außenmantel) Outer jacket
) Flach) Flat
) Rolle) Role
) Bolzen) Bolt
) Innenmantel) Inner jacket
) Brückenstück) Bridge piece
0) abtriebsseitige Stirn0) output-side forehead
1 ) Stößelfolgeteil, Pumpenkolben1) ram part, pump piston
2) Unterseite2) bottom
3) abtriebsseitige Ringstirn3) output side annular end
4) Ring4) ring
5) Nut5) groove
6) Oberseite6) top
7) Lasche7) tab
8) Federteller8) spring plate
9) Außenrand9) outer edge
0) Ringbereich0) Ring area
1 ) Oberseite1) top
2) Außenrand2) outer edge
3) Durchbruch3) breakthrough
4) Querstirn4) Crossbeam
5) Nase5) nose
6) Querstirn6) Crossbeam
7) Hemdaussparung7) shirt pocket
8) Querbalken8) Crossbeams
9) Fenster 9) windows

Claims

Patentansprüche Patent claims
Stößel (1 ), insbesondere für eine Pumpe oder einen Verdichter, mit einem rohrähnlichen Gehäuse Plunger (1), especially for a pump or a compressor, with a tube-like housing
(2), bei dessen antriebsseitiger Ringstirn (2), at its drive-side ring face
(3) sich zwei von einem Außenmantel (3) two of one outer jacket
(4) des Gehäuses (2) eingerückte Flachs (4) of the housing (2) indented flax
(5) diametral gegenüber liegen, in denen ein eine Rolle (5) lie diametrically opposite, in which a plays a role
(6) tragender Bolzen (6) supporting bolt
(7) gelagert ist, wobei ein Innenmantel (8) des Gehäuses (2), axial unterhalb der Rolle (6), von einem separaten Brückenstück (9) durchragt ist, dessen abtriebsseitige Stirn (10) als Anlage für ein Stößelfolgeteil (1 1 ) fungiert und welches Brückenstück (9) in Richtung zur an- triebsseitigen Ringstirn (3) an Unterseiten (12) der Flachs (5) anliegt sowie in Richtung zu einer abtriebsseitigen Ringstirn (13) des Gehäuses (2) durch einen am Innenmantel (8) fixierten Ring (14) gehalten ist, dadurch gekennzeichnet, dass der Ring (14) ein gesprengtes Federband ist und in einer komplementären Nut (15) des Innenmantels (8) des Gehäuses (2), in dieses radial nicht aus der Nut (15) einragend, sitzt, wobei von einer Oberseite (16) des Rings (14) zumindest zwei Laschen (17) radial nach innen abstehen, auf weichen das Brückenstück (9) in Richtung zu der abtriebsseitigen Ringstirn (13) fixiert ist. (7) is mounted, an inner jacket (8) of the housing (2), axially below the roller (6), being penetrated by a separate bridge piece (9), the output-side end (10) of which acts as a system for a follower part (1 1 ) acts and which bridge piece (9) rests in the direction of the drive-side ring face (3) on the undersides (12) of the flax (5) and in the direction of an output-side ring face (13) of the housing (2) through an inner casing (8 ) fixed ring (14), characterized in that the ring (14) is an exploded spring band and in a complementary groove (15) of the inner jacket (8) of the housing (2), in this not radially out of the groove (15 ) protruding, sits, with at least two tabs (17) protruding radially inwards from a top side (16) of the ring (14), on which the bridge piece (9) is fixed in the direction of the output-side ring face (13).
Stößel nach Anspruch 1 , welcher mit dem Stößelfolgeteil eine Baugruppe bildet, dadurch gekennzeichnet, dass das Stößelfolgeteil (1 1 ) ein Pumpenkolben ist, welcher durch einen Federteller (18) an der abtriebsseitigen Stirn (10) des Brückenstücks (9) gehalten ist, wobei der Federteller (18) mit einem von seinem Außenrand (19) ausgehenden Ringbereich (20) an der abtriebsseitigen Stirn (10) des Brückenstücks (9) anliegt und wobei die Laschen (17) in komplementären Taschen oder einer Ringaussparung (20) in einer Oberseite (21 ) des Ringbereichs (20) des Federtellers (18) sitzen. Plunger according to claim 1, which forms an assembly with the plunger follower part, characterized in that the plunger follower part (1 1) is a pump piston which is held by a spring plate (18) on the output-side forehead (10) of the bridge piece (9), whereby the spring plate (18) rests with an annular region (20) extending from its outer edge (19) on the output-side forehead (10) of the bridge piece (9) and the tabs (17) in complementary pockets or an annular recess (20) in an upper side (21) of the ring area (20) of the spring plate (18).
Stößel nach Anspruch 2, dadurch gekennzeichnet, dass der Federteller (18), ausgehend von dessen Außenrand (22), mit Durchbrüchen (23) für einen Mediendurchtritt versehen ist. Stößel nach Anspruch 1 , dadurch gekennzeichnet, dass das Brückenstück (9) durch den Ring (14) axial spielfrei im Gehäuse (2) gehalten ist. Plunger according to claim 2, characterized in that the spring plate (18), starting from its outer edge (22), is provided with openings (23) for media to pass through. Plunger according to claim 1, characterized in that the bridge piece (9) is held axially without play in the housing (2) by the ring (14).
Stößel nach Anspruch 1 , dadurch gekennzeichnet, dass das Brückenstück (9) als Balken vorliegt, dessen eine Querstirn (24) mit einer Nase (25) das Gehäuse (2) zur Darstellung einer Stößelverdrehsicherung durchragt, wobei dessen beide Querstirnen (24, 26) entweder bogensehnenartig das Gehäuse (2) durchschneiden oder mit einem zu einem Radius des Innenmantels (8) des Gehäuses (2) zumindest ähnlichen Radius unmittelbar vor oder an dem Innenmantel (8) verlaufen. Plunger according to claim 1, characterized in that the bridge piece (9) is in the form of a beam, one transverse face (24) of which protrudes through the housing (2) with a nose (25) to represent a plunger anti-twist device, with its two transverse faces (24, 26) either cut through the housing (2) like a bowstring or run directly in front of or on the inner jacket (8) with a radius at least similar to a radius of the inner jacket (8) of the housing (2).
Stößel nach Anspruch 5, dadurch gekennzeichnet, dass die Nase (25) einteilig vom Brückenstück (9) abragt, wobei dessen notwendige Hemdaussparung (27) von einem oberen Querbalken (28) eines Fensters (29) im Gehäuse (2) ausgeht, welches Fenster (29) durch eines der eingerückten Flachs (5) im Gehäuse (2) gebildet ist. Plunger according to claim 5, characterized in that the nose (25) protrudes in one piece from the bridge piece (9), the necessary shirt recess (27) starting from an upper crossbar (28) of a window (29) in the housing (2), which window (29) is formed by one of the indented flaxes (5) in the housing (2).
Stößel nach Anspruch 1 , dadurch gekennzeichnet, dass der Innenmantel (8) des Gehäuses (2), unterhalb des Querbalkens (28), bis auf die Nut (15) für den Ring (14), ungestuft und vorsprungsfrei ist. Plunger according to claim 1, characterized in that the inner jacket (8) of the housing (2), below the crossbar (28), except for the groove (15) for the ring (14), is unstepped and free of projections.
8. Stößel nach Anspruch 1 , dadurch gekennzeichnet, dass das Brückenstück (9) als Blechstanzteil vorliegt. 8. Plunger according to claim 1, characterized in that the bridge piece (9) is present as a stamped sheet metal part.
EP13823929.8A 2013-01-29 2013-11-18 Plunger Not-in-force EP2951435B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013201335.3A DE102013201335A1 (en) 2013-01-29 2013-01-29 tappet
PCT/DE2013/200304 WO2014117762A1 (en) 2013-01-29 2013-11-18 Plunger

Publications (2)

Publication Number Publication Date
EP2951435A1 true EP2951435A1 (en) 2015-12-09
EP2951435B1 EP2951435B1 (en) 2017-02-01

Family

ID=49999654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13823929.8A Not-in-force EP2951435B1 (en) 2013-01-29 2013-11-18 Plunger

Country Status (4)

Country Link
US (1) US9410518B2 (en)
EP (1) EP2951435B1 (en)
DE (1) DE102013201335A1 (en)
WO (1) WO2014117762A1 (en)

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EP3173590B1 (en) * 2015-11-24 2018-06-20 Aktiebolaget SKF Cam follower roller device with washer
KR102210446B1 (en) * 2016-04-15 2021-02-01 코요 베어링즈 노쓰 아메리카 엘엘씨 Tappet with inner cup housed on pallet
JP7022380B2 (en) * 2018-01-31 2022-02-18 いすゞ自動車株式会社 Fuel pump assembly structure
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
DE102020104313B3 (en) 2020-02-19 2021-01-28 Schaeffler Technologies AG & Co. KG Plunger for acting on a pump piston of a high-pressure fuel pump

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DE102006028348B3 (en) * 2006-06-20 2007-10-31 Siemens Ag Rolling bearing device has locking element arranged so that in cavity of cylinder-shaped element it is coupled with positive locking with regard to axial and rotational direction in regard to center axis of cylinder-shaped element
JP5303468B2 (en) * 2006-12-05 2013-10-02 シャエフラー カーゲー Mechanical tappets, especially for internal combustion engine fuel pumps
US7793583B2 (en) * 2006-12-06 2010-09-14 Schaeffler Kg Mechanical tappet in particular for a fuel pump of an internal combustion engine
DE102006059716A1 (en) * 2006-12-18 2008-06-26 Mahle International Gmbh Non-rotating ram of a valve train
DE102012202568B4 (en) * 2012-02-20 2021-12-23 Schaeffler Technologies AG & Co. KG Roller tappet with brackets for a stepped bolt
DE102012210176A1 (en) * 2012-06-18 2013-12-19 Schaeffler Technologies AG & Co. KG tappet
DE102012211113A1 (en) 2012-06-28 2014-01-02 Schaeffler Technologies AG & Co. KG tappet
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Also Published As

Publication number Publication date
EP2951435B1 (en) 2017-02-01
US9410518B2 (en) 2016-08-09
DE102013201335A1 (en) 2014-07-31
US20150361937A1 (en) 2015-12-17
WO2014117762A1 (en) 2014-08-07

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