EP2568171A2 - Ram - Google Patents

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Publication number
EP2568171A2
EP2568171A2 EP12173506A EP12173506A EP2568171A2 EP 2568171 A2 EP2568171 A2 EP 2568171A2 EP 12173506 A EP12173506 A EP 12173506A EP 12173506 A EP12173506 A EP 12173506A EP 2568171 A2 EP2568171 A2 EP 2568171A2
Authority
EP
European Patent Office
Prior art keywords
housing
shell
ring
tappet according
segment
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
EP12173506A
Other languages
German (de)
French (fr)
Other versions
EP2568171B1 (en
EP2568171A3 (en
Inventor
Stefan Dorn
Norbert Geyer
Marco JUNKER
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
Priority to PL12173506T priority Critical patent/PL2568171T3/en
Publication of EP2568171A2 publication Critical patent/EP2568171A2/en
Publication of EP2568171A3 publication Critical patent/EP2568171A3/en
Application granted granted Critical
Publication of EP2568171B1 publication Critical patent/EP2568171B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • F04B1/0439—Supporting or guiding means for the 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston 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
    • F04B9/042—Piston 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 the means being 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston 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
    • F04B9/045—Piston 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 the means being eccentrics

Definitions

  • the invention relates to a plunger, in particular for a high-pressure fuel pump, with a housing which receives in the region of its drive-side end a role for a start of a periodic Huber Wegers, wherein the housing is penetrated axially below the roller by a connected to the inner jacket bridge piece, one of on the output side facing the housing side facing at least indirectly serves as a plant for a follower part, wherein an upper side of the bridge piece has a cup-like indentation in which a separated from a ring, movable shell segment sitting on the inner race, the roller is slidably mounted and wherein the shell segment ausFEgeschreib in the indentation runs.
  • Such a plunger is from the DE 10 2009 056 303 A1 previously known. Its shell segment undergoes in the indentation of the bridge piece a Auswindsch by struck on the bridge piece lugs. It is clear that under appropriate load, the shell segment break through the resistance of the noses and thus can rotate out of the indentation. Furthermore, an "unfavorable" crack course during cracking, as not 100% predictable, has an influence on the ability to guide and hold.
  • the object is therefore to provide a plunger of the aforementioned type, in which the identified disadvantages are eliminated.
  • the shell segment should run well secured against rotation in the molding and can be mounted safely and inexpensively.
  • this object is achieved in that at least one Axial arrangementsklale is arranged on the inner casing of the housing, on which the shell segment is arranged austipgeschreibt over a respective corner recess on a separation front. It is particularly preferred in this case that four Axial arrangementsklalen are distributed on the inner surface of the housing, where the shell segment is arranged secured against rotation on Eckaussparungen on the two Trennstirnen.
  • the shell segment can be mounted "accurately" and safely and also experiences on the axial guide columns an excellent anti-rotation, at the same time low desired mobility. Possibly. less than four pillars are also suitable, for example two diametrically opposite or only one pillar.
  • the plunger also called roller tappet
  • the plunger is intended to be used in particular in high-pressure pumps for fuel delivery of quality-controlled internal combustion engines (fuel lubrication).
  • fuel lubrication quality-controlled internal combustion engines
  • it is also conceivable and intended to be used in quantity-controlled internal combustion engines or as a classic, cam-following plunger in a valve train of an internal combustion engine.
  • Huberzeuger serve a cam, an eccentric or a group thereof.
  • At least one Axial Equipmentsklale should protrude in a further development of the invention in one piece from the inner surface of the housing and in cross-section have a triangle-like tapered geometry.
  • this column can be easily formed in the preferably non-cutting production process of the housing.
  • the bridge piece should be an integral part of the housing.
  • subsequent assembly costs are minimized, with which assembly a negative dimensional influence of the plunger can occur.
  • a correspondingly blunt tool with axial force is applied to the front side of the ring, it being helpful here to arrange a notch, as stated in the claim, in the section of an axial end of the ring.
  • the notch can be present as a corresponding indentation or as a laser notch or other targeted material weakening.
  • a plunger 1 for a high-pressure fuel pump Shown is a plunger 1 for a high-pressure fuel pump. This has a cylindrical housing 2, which receives in the region of its drive-side end 3 a roller 4 for a start of a single or multiple cam.
  • the housing 2 is penetrated by a bridge piece 6, which starts in one piece from the inner shell 5.
  • a driven-side end 7 of the housing 2 facing bottom 8 of the bridge piece 6 serves as a plant for a ram succession part (here pump piston).
  • An upper side 9 of the bridge piece 6 has a shell-like indentation 10, which consists of Fig. 2 is apparent. In this sits a separated from a ring 11, therein slightly movable held cup segment 12, on the inner race 13, the roller 4 is slidably mounted. A lubrication of this storage is carried out by fuel, with a separate oil lubrication is conceivable.
  • the shell segment 12 extends secured against rotation in the indentation 10.
  • the shell segment 12 goes from the inner shell 5 of the housing 2 four Axial arrangementsklalen 14 in one piece, where the shell segment 12 via Eckaussparungen 15 (see also Fig. 4 ) is arranged austipgeschreibt at the two Trennstirnen 16.
  • the corner recesses 15 are partially complementary to the outer contour of the Axial arrangementsklalen 14th
  • a significant chamfer 19 This is to be understood as meaning a chamfer which is larger than a standard or minimal chamfer for such a transitional region.
  • Each shell segment 12 is obtained by cracking a ring 11 (see also FIG Fig. 3, 4 ).
  • the ring 11 has hereafter three 3 Trennstirn Schemee 20.
  • At both Axialstirnen 21 of the ring 11 is an end of its outer shell 22 outgoing semicircular recess 23 is applied for each separation end region 20 for the representation of two of the Eckaussparungen 15.
  • In each recess 23 opens a running at the axial end 21 notch 24th
  • a correspondingly blunt tool is brought axially onto the notch 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The plunger (1) has a cylindrical housing (2) axially protruded below a roller (4) by an arch piece (6). A lower side (8) of the piece is turned towards an output-sided forehead (7) of the housing. An upper side (9) of the piece includes a shell-like form (10) in which a movable shell segment (12) separated from a ring is placed. The roller is supported on an inner rail (13). The segment runs in the shell-like form. An axial guiding column (14) is arranged at an inner sheath of the housing. The segment is arranged at a separation forehead over a corner recess in a turnout-protected manner. The shell segment is formed as a half shell, a one-third shell or a quarter shell. The housing is formed as steel sheet- and/or extrusion parts.

Description

Die Erfindung betrifft einen Stößel, insbesondere für eine Kraftstoffhochdruckpumpe, mit einem Gehäuse, das im Bereich seiner antriebsseitigen Stirn eine Rolle für einen Anlauf eines periodischen Huberzeugers aufnimmt, wobei das Gehäuse axial unterhalb der Rolle von einem mit dessen Innenmantel verbundenen Brückenstück durchragt ist, dessen einer abtriebsseitigen Stirn des Gehäuses zugewandte Unterseite zumindest mittelbar als Anlage für ein Stößelfolgeteil dient, wobei eine Oberseite des Brückenstücks eine schalenartige Einformung aufweist, in der ein aus einem Ring abgetrenntes, bewegliches Schalensegment sitzt, auf dessen Innenbahn die Rolle gleitgelagert ist und wobei das Schalensegment ausdrehgesichert in der Einformung verläuft.The invention relates to a plunger, in particular for a high-pressure fuel pump, with a housing which receives in the region of its drive-side end a role for a start of a periodic Huberzeugers, wherein the housing is penetrated axially below the roller by a connected to the inner jacket bridge piece, one of on the output side facing the housing side facing at least indirectly serves as a plant for a follower part, wherein an upper side of the bridge piece has a cup-like indentation in which a separated from a ring, movable shell segment sitting on the inner race, the roller is slidably mounted and wherein the shell segment ausdrehgesichert in the indentation runs.

Ein derartiger Stößel ist aus der DE 10 2009 056 303 A1 vorbekannt. Dessen Schalensegment erfährt in der Einformung des Brückenstücks eine Ausdrehsicherung durch am Brückenstück angestemmte Nasen. Klar ist, dass unter entsprechender Belastung das Schalensegment den Widerstand der Nasen durchbrechen und sich somit aus der Einformung drehen kann. Weiterhin hat ein "ungünstiger" Rissverlauf beim Cracken, da nicht 100%ig vorhersehbar, Einfluss auf die Führungs- und Haltefähigkeit.Such a plunger is from the DE 10 2009 056 303 A1 previously known. Its shell segment undergoes in the indentation of the bridge piece a Ausdrehsicherung by struck on the bridge piece lugs. It is clear that under appropriate load, the shell segment break through the resistance of the noses and thus can rotate out of the indentation. Furthermore, an "unfavorable" crack course during cracking, as not 100% predictable, has an influence on the ability to guide and hold.

Aufgabe ist es daher, einen Stößel der vorgenannten Gattung zu schaffen, bei dem die aufgezeigten Nachteile beseitigt sind. Insbesondere soll dessen Schalensegment gut ausdrehgesichert in der Einformung verlaufen und sich sicher und kostengünstig montieren lassen.The object is therefore to provide a plunger of the aforementioned type, in which the identified disadvantages are eliminated. In particular, the shell segment should run well secured against rotation in the molding and can be mounted safely and inexpensively.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass am Innenmantel des Gehäuses wenigstens eine Axialführungssäule angeordnet ist, an welcher das Schalensegment über eine respektive Eckaussparung an einer Trennstirn ausdrehgesichert angeordnet ist. Besonders bevorzugt ist es hierbei, dass am Innenmantel des Gehäuses vier Axialführungssäulen verteilt sind, an denen das Schalensegment über Eckaussparungen an dessen beiden Trennstirnen ausdrehgesichert angeordnet ist.According to the invention, this object is achieved in that at least one Axialführungssäule is arranged on the inner casing of the housing, on which the shell segment is arranged ausdrehgesichert over a respective corner recess on a separation front. It is particularly preferred in this case that four Axialführungssäulen are distributed on the inner surface of the housing, where the shell segment is arranged secured against rotation on Eckaussparungen on the two Trennstirnen.

Somit ist ein Stößel ohne die eingangs genannten Nachteile geschaffen. Das Schalensegment lässt sich "zielgenau" und sicher montieren und erfährt zudem an den Axialführungssäulen eine hervorragende Ausdrehsicherung, bei gleichzeitig geringer gewünschter Beweglichkeit. Ggf. kommen auch weniger als vier Säulen infrage, so bspw. zwei sich diametral gegenüberliegende oder lediglich eine.Thus, a plunger is created without the disadvantages mentioned above. The shell segment can be mounted "accurately" and safely and also experiences on the axial guide columns an excellent anti-rotation, at the same time low desired mobility. Possibly. less than four pillars are also suitable, for example two diametrically opposite or only one pillar.

Der Stößel, auch Rollenstößel genannt, soll insbesondere bei Hochdruckpumpen zur Kraftstoffförderung von qualitätsgeregelten Brennkraftmaschinen Anwendung finden (Kraftstoffschmierung). Denkbar und vorgesehen ist jedoch auch ein Einsatz bei quantitätsgeregelten Brennkraftmaschinen oder als klassischer, nockenfolgender Stößel in einem Ventiltrieb einer Brennkraftmaschine. Als Huberzeuger dienen ein Nocken, ein Exzenter oder eine Gruppe hiervon.The plunger, also called roller tappet, is intended to be used in particular in high-pressure pumps for fuel delivery of quality-controlled internal combustion engines (fuel lubrication). However, it is also conceivable and intended to be used in quantity-controlled internal combustion engines or as a classic, cam-following plunger in a valve train of an internal combustion engine. As Huberzeuger serve a cam, an eccentric or a group thereof.

Die vorgenannte, wenigstens eine Axialführungssäule soll in Fortbildung der Erfindung einteilig vom Innenmantel des Gehäuses abstehen und im Querschnitt eine dreieckähnlich zulaufende Geometrie haben. Somit kann diese Säule beim bevorzugt spanlosen Herstellprozess des Gehäuses einfach mit ausgeformt werden. Denkbar ist es jedoch auch, diese als separates Teil vorzusehen und nachträglich, bspw. durch Schweißen oder Fügen, mit dem Hemd des Gehäuses zu verbinden.The aforementioned, at least one Axialführungssäule should protrude in a further development of the invention in one piece from the inner surface of the housing and in cross-section have a triangle-like tapered geometry. Thus, this column can be easily formed in the preferably non-cutting production process of the housing. However, it is also conceivable to provide these as a separate part and subsequently, for example by welding or joining, to connect with the shirt of the housing.

Die in einem weiteren Unteranspruch vorgeschlagene deutliche Fase im Kantenbereich des Schalensegments von dessen Axialstirnsegment zur Innenbahn sorgt für einen von Auswürfen etc. freien Innenbahnbereich. Diese Auswürfe können beim Crackprozess, also beim stumpfen Abtrennen der Schalensegmente aus einem fertigen oder halbfertigen Ring wie bspw. einem Wälzlagerring, der fertig bearbeitet sein kann, entstehen. Es sind jedoch auch andere Trennverfahren wie Sägen oder Schleifen (Trennschleifen) denkbar und vorgesehen.The proposed in a further subclaim clear chamfer in the edge region of the shell segment of the Axialstirnsegment to the inner web provides for an ejection, etc., free inner track area. These ejections can occur during the cracking process, ie during the blunt separation of the shell segments from a finished or semi-finished ring, such as, for example, a roller bearing ring, which can be finished. However, other separation methods such as sawing or grinding (cutting loops) are conceivable and provided.

In Konkretisierung der Erfindung soll das Brückenstück einteiliger Bestandteil des Gehäuses sein. Somit werden nachträgliche Montagekosten minimiert, bei welcher Montage auch eine negative maßliche Beeinflussung des Stößels auftreten kann.In concretization of the invention, the bridge piece should be an integral part of the housing. Thus, subsequent assembly costs are minimized, with which assembly a negative dimensional influence of the plunger can occur.

Bei dem vorgenannten Cracken können bspw. zwei bis vier Elemente aus einem Ring gewonnen werden. Hierbei wird stirnseitig des Rings ein entsprechend stumpfes Werkzeug mit Axialkraft appliziert, wobei es hilfreich ist, hierbei eine Kerbe, wie anspruchsgemäß aufgeführt, im Abschnitt einer Axialstirn des Rings anzuordnen. Die Kerbe kann als entsprechende Einformung oder als Laserkerbe oder andere gezielte Materialschwächung vorliegen. Trotz eines nicht 100%-ig vorhersagbaren Rissverlaufs an den Trennstirnen beeinflusst dieser nicht die Führung und Ausdrehsicherung des gewonnenen Schalensegments im Stößel negativ.In the aforementioned cracking, for example, two to four elements can be obtained from a ring. Here, a correspondingly blunt tool with axial force is applied to the front side of the ring, it being helpful here to arrange a notch, as stated in the claim, in the section of an axial end of the ring. The notch can be present as a corresponding indentation or as a laser notch or other targeted material weakening. Despite a not 100% predictable crack course at the dividing forks this does not affect the guidance and Ausdrehsicherung the recovered shell segment in the plunger negatively.

Zur Zeichnung:

  • ● Fig. 1 zeigt eine räumliche Ansicht auf einen als Pumpenstößel ausgebildeten Stößel;
  • ● Fig. 2 einen Längsschnitt durch den Stößel;
  • ● Fig. 3 einen Wälzlagerring als Ring, aus welchem die Schalensegmente gewonnen werden und
  • ● Fig. 4 als Einzelheit ein Schalensegment.
To the drawing:
  • ● Fig. 1 shows a three-dimensional view of a designed as a pump plunger ram;
  • ● Fig. 2 a longitudinal section through the plunger;
  • ● Fig. 3 a rolling bearing ring as a ring from which the shell segments are obtained and
  • ● Fig. 4 as a detail a shell segment.

Dargestellt ist ein Stößel 1 für eine Kraftstoffhochdruckpumpe. Dieser hat ein zylindrisches Gehäuse 2, welches im Bereich seiner antriebsseitigen Stirn 3 eine Rolle 4 für einen Anlauf eines Ein- oder Mehrfachnockens aufnimmt.Shown is a plunger 1 for a high-pressure fuel pump. This has a cylindrical housing 2, which receives in the region of its drive-side end 3 a roller 4 for a start of a single or multiple cam.

Axial unterhalb der Rolle 4 ist das Gehäuse 2 von einem Brückenstück 6 durchragt, das einteilig von dessen Innenmantel 5 ausgeht. Eine einer abtriebsseitigen Stirn 7 des Gehäuses 2 zugewandte Unterseite 8 des Brückenstücks 6 dient als Anlage für ein Stößelfolgeteil (hier Pumpenkolben).Axially below the roller 4, the housing 2 is penetrated by a bridge piece 6, which starts in one piece from the inner shell 5. One of a driven-side end 7 of the housing 2 facing bottom 8 of the bridge piece 6 serves as a plant for a ram succession part (here pump piston).

Eine Oberseite 9 des Brückenstücks 6 weist eine schalenartige Einformung 10 auf, die aus Fig. 2 ersichtlich ist. In dieser sitzt ein aus einem Ring 11 abgetrenntes, darin geringfügig beweglich gehaltenes Schalensegment 12, auf dessen Innenbahn 13 die Rolle 4 gleitgelagert verläuft. Eine Schmierung dieser Lagerung erfolgt durch Kraftstoff, wobei auch eine separate Ölschmierung denkbar ist.An upper side 9 of the bridge piece 6 has a shell-like indentation 10, which consists of Fig. 2 is apparent. In this sits a separated from a ring 11, therein slightly movable held cup segment 12, on the inner race 13, the roller 4 is slidably mounted. A lubrication of this storage is carried out by fuel, with a separate oil lubrication is conceivable.

Zu erkennen ist, dass das Schalensegment 12 ausdrehgesichert in der Einformung 10 verläuft. Hierfür gehen vom Innenmantel 5 des Gehäuses 2 vier Axialführungssäulen 14 einteilig aus, an denen das Schalensegment 12 über Eckaussparungen 15 (s. a. Fig. 4) an dessen beiden Trennstirnen 16 ausdrehgesichert angeordnet ist. Die Eckaussparungen 15 sind teilkomplementär zur Außenkontur der Axialführungssäulen 14.It can be seen that the shell segment 12 extends secured against rotation in the indentation 10. For this purpose go from the inner shell 5 of the housing 2 four Axialführungssäulen 14 in one piece, where the shell segment 12 via Eckaussparungen 15 (see also Fig. 4 ) is arranged ausdrehgesichert at the two Trennstirnen 16. The corner recesses 15 are partially complementary to the outer contour of the Axialführungssäulen 14th

Wie aus den Fig. 1, 3 zu entnehmen ist, weist ein Kantenbereich 17 des Schalensegments 12 von dessen jeweiligem Axialstirnsegment 18 zur Innenbahn 13 eine deutliche Fase 19 auf. Darunter ist eine Fase zu verstehen, die größer als eine Norm- oder Minimalfase für einen derartigen Übergangsbereich ist.Like from the Fig. 1 . 3 can be seen, has an edge portion 17 of the shell segment 12 of the respective Axialstirnsegment 18 to the inner web 13 a significant chamfer 19. This is to be understood as meaning a chamfer which is larger than a standard or minimal chamfer for such a transitional region.

Jedes Schalensegment 12 wird durch Cracken aus einem Ring 11 gewonnen (s. a. Fig. 3, 4). Der Ring 11 hat hiernach drei 3 Trennstirnbereiche 20. An beiden Axialstirnen 21 des Rings 11 ist je Trennstirnbereich 20 eine von dessen Außenmantel 22 ausgehende halbkreisförmige Ausnehmung 23 zur Darstellung von jeweils zwei der Eckaussparungen 15 appliziert. In jede Ausnehmung 23 mündet eine an der Axialstirn 21 verlaufende Kerbe 24.Each shell segment 12 is obtained by cracking a ring 11 (see also FIG Fig. 3, 4 ). The ring 11 has hereafter three 3 Trennstirnbereiche 20. At both Axialstirnen 21 of the ring 11 is an end of its outer shell 22 outgoing semicircular recess 23 is applied for each separation end region 20 for the representation of two of the Eckaussparungen 15. In each recess 23 opens a running at the axial end 21 notch 24th

Zum Abtrennen (Cracken) der Schalensegmente 12, also zur Risserzeugung, wird ein entsprechend stumpfes Werkzeug axial auf die Kerbe 24 gebracht.For separating (cracking) the shell segments 12, that is to say for generating cracks, a correspondingly blunt tool is brought axially onto the notch 24.

Liste der BezugszahlenList of reference numbers

1)1)
Stößeltappet
2)2)
Gehäusecasing
3)3)
antriebsseitige Stirndrive-side forehead
4)4)
Rollerole
5)5)
Innenmantelinner sheath
6)6)
Brückenstückbridge piece
7)7)
abtriebsseitige Stirnoutput-side forehead
8)8th)
Unterseitebottom
9)9)
Oberseitetop
10)10)
Einformungindentation
11)11)
Ringring
12)12)
Schalensegmentshell segment
13)13)
Innenbahninside track
14)14)
AxialführungssäuleAxialführungssäule
15)15)
Eckaussparungcorner recess
16)16)
Trennstirnseparation forehead
17)17)
Kantenbereichedge region
18)18)
AxialstirnsegmentAxialstirnsegment
19)19)
Fasechamfer
20)20)
TrennstirnbereichSeparation forehead
21)21)
AxialstirnAxialstirn
22)22)
Außenmantelouter sheath
23)23)
Ausnehmungrecess
24)24)
Kerbescore

Claims (9)

Stößel (1), insbesondere für eine Kraftstoffhochdruckpumpe, mit einem Gehäuse (2), das im Bereich seiner antriebsseitigen Stirn (3) eine Rolle (4) für einen Anlauf eines periodischen Huberzeugers aufnimmt, wobei das Gehäuse (2) axial unterhalb der Rolle (4) von einem mit dessen Innenmantel (5) verbundenen Brückenstück (6) durchragt ist, dessen einer abtriebsseitigen Stirn (7) des Gehäuses (2) zugewandte Unterseite (8) zumindest mittelbar als Anlage für ein Stößelfolgeteil dient, wobei eine Oberseite (9) des Brückenstücks (6) eine schalenartige Einformung (10) aufweist, in der ein aus einem Ring (11) abgetrenntes, bewegliches Schalensegment (12) sitzt, auf dessen Innenbahn (13) die Rolle (4) gleitgelagert ist und wobei das Schalensegment (12) ausdrehgesichert in der Einformung (10) verläuft, dadurch gekennzeichnet, dass am Innenmantel (5) des Gehäuses (2) wenigstens eine Axialführungssäule (14) angeordnet ist, an welcher das Schalensegment (12) über eine respektive Eckaussparung (15) an einer Trennstirn (16) ausdrehgesichert angeordnet ist.Plunger (1), in particular for a high-pressure fuel pump, with a housing (2) which receives in the region of its drive-side end (3) a roller (4) for starting a periodic Huberzeugers, wherein the housing (2) axially below the roller ( 4) is penetrated by a bridge piece (6) connected to its inner jacket (5), whose underside (8) facing an output side end (7) of the housing (2) at least indirectly serves as abutment for a ram follower part, an upper side (9) of the bridge piece (6) has a shell-like indentation (10) in which a movable shell segment (12) separated from a ring (11) sits, on whose inner web (13) the roller (4) is slidably mounted and wherein the shell segment (12 ) in the indentation (10) extends, characterized in that on the inner casing (5) of the housing (2) at least one Axialführungssäule (14) is arranged, on which the shell segment (12) via a respectively Ec Kaussparung (15) on a separating end (16) is arranged secured against rotation. Stößel nach Anspruch 1, dadurch gekennzeichnet, dass am Innenmantel (5) des Gehäuses (2) genau vier Axialführungssäulen (14) verteilt sind, an denen das Schalensegment (12) über respektive Eckaussparungen (15) an dessen beiden Trennstirnen (16) ausdrehgesichert angeordnet ist.Tappet according to claim 1, characterized in that on the inner casing (5) of the housing (2) exactly four Axialführungssäulen (14) are distributed, arranged on which the shell segment (12) via respective Eckaussparungen (15) on the two Trennstirnen (16) ausdrehgesichert is. Stößel nach Anspruch 1, dadurch gekennzeichnet, dass die jeweilige Eckaussparung (15) wenigstens teilkomplementär oder im Wesentlichen komplementär zu ihrer Axialführungssäule (14) ist.Tappet according to claim 1, characterized in that the respective corner recess (15) is at least partially complementary or substantially complementary to its Axialführungssäule (14). Stößel nach Anspruch 1, dadurch gekennzeichnet, dass ein Kantenbereich (17) des Schalensegments (12) von dessen jeweiligem Axialstirnsegment (18) zumindest zur Innenbahn (13) mit einer deutlichen Fase (19) versehen ist.Tappet according to claim 1, characterized in that an edge region (17) of the shell segment (12) of the respective Axialstirnsegment (18) at least to the inner web (13) is provided with a distinct chamfer (19). Stößel nach Anspruch 1, dadurch gekennzeichnet, dass die jeweilige Axialführungssäule (14) einteilig mit dem Innenmantel (5) des Gehäuses (2) verbunden ist sowie im Querschnitt spitz in Richtung auf eine Axiallinie des Stößel (1) zuläuft.Tappet according to claim 1, characterized in that the respective Axialführungssäule (14) is integrally connected to the inner shell (5) of the housing (2) and in cross-section tapered towards an axial line of the plunger (1). Stößel nach Anspruch 1, dadurch gekennzeichnet, dass das Brückenstück (6) einteilig mit dem Gehäuse (2) verbunden ist.Tappet according to claim 1, characterized in that the bridge piece (6) is integrally connected to the housing (2). Stößel nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Schalensegment (18) eine Halb-, Drittel oder Viertelschale ist sowie aus einem Wälzlagerring oder einem ähnlichen Bauteil als Ring (11) und durch ein Trennverfahren wie Cracken, Sägen, Erodieren oder Fräsen aus diesem gewonnen ist.Tappet according to claim 1 or 2, characterized in that the shell segment (18) is a half, third or quarter shell and from a rolling bearing ring or a similar component as a ring (11) and by a separation process such as cracking, sawing, eroding or milling this is won. Stößel nach Anspruch 7, sofern auf Anspruch 2 rückbezogen, dadurch gekennzeichnet, dass, je Trennstirnbereich (20), an wenigstens einer Axialstirn (21) des Rings (11) eine von dessen Außenmantel (22) ausgehende halbkreisförmige Ausnehmung (23) zur Darstellung von jeweils zwei der Eckaussparungen (15) appliziert ist, wobei jede Ausnehmung (23) von einer Kerbe (24) an der Axialstirn (21) geschnitten ist, die radial zu einer Axiallinie des Standardwälzlagerings als Ring (11) ausgerichtet ist.Tappet according to claim 7, if dependent on claim 2, characterized in that , for each Trennstirnbereich (20), at least one axial end (21) of the ring (11) from one of its outer shell (22) outgoing semicircular recess (23) for the representation of each two of the corner recesses (15) is applied, wherein each recess (23) is cut by a notch (24) on the Axialstirn (21), which is aligned radially to an axial line of the standard rolling bearing ring as a ring (11). Stößel nach Anspruch 1, dadurch gekennzeichnet, dass das Gehäuse (2) als Stahlblech- bzw. Fließpressteil vorliegt.Tappet according to Claim 1, characterized in that the housing (2) is in the form of a sheet steel or extruded part.
EP12173506.2A 2011-09-09 2012-06-26 Ram Active EP2568171B1 (en)

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CN106988817A (en) * 2015-11-24 2017-07-28 斯凯孚公司 Cam driven roller arrangement with packing ring
CN114320729A (en) * 2020-09-28 2022-04-12 大同金属工业株式会社 Bearing arrangement for radial piston machine

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DE102015223571B4 (en) * 2015-11-27 2021-07-22 Vitesco Technologies GmbH Roller tappet and high-pressure fuel pump
JP7167108B2 (en) * 2020-09-28 2022-11-08 大同メタル工業株式会社 Bearing device of radial piston machine
CN113898585B (en) * 2021-10-26 2023-08-04 浙江象睿机电设备有限公司 Intelligent energy consumption control device of air compressor

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DE102009056306A1 (en) * 2009-11-30 2011-06-01 Schaeffler Technologies Gmbh & Co. Kg roller plunger
DE102009056305A1 (en) * 2009-11-30 2011-06-01 Schaeffler Technologies Gmbh & Co. Kg Roller plunger, particularly for high-pressure fuel pump or for valve train of quality-or quantity controlled internal combustion engine, has housing which is projected under roller by bridge piece
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Publication number Priority date Publication date Assignee Title
CN106988817A (en) * 2015-11-24 2017-07-28 斯凯孚公司 Cam driven roller arrangement with packing ring
CN114320729A (en) * 2020-09-28 2022-04-12 大同金属工业株式会社 Bearing arrangement for radial piston machine
CN114320729B (en) * 2020-09-28 2024-01-19 大同金属工业株式会社 Bearing device of radial piston device

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DE102011082434A1 (en) 2013-03-14
EP2568171B1 (en) 2019-06-12
PL2568171T3 (en) 2019-11-29
EP2568171A3 (en) 2016-07-20

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