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WO2018153396A1 - Roller tappet - Google Patents

Roller tappet Download PDF

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Publication number
WO2018153396A1
WO2018153396A1 PCT/DE2018/100035 DE2018100035W WO2018153396A1 WO 2018153396 A1 WO2018153396 A1 WO 2018153396A1 DE 2018100035 W DE2018100035 W DE 2018100035W WO 2018153396 A1 WO2018153396 A1 WO 2018153396A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
roller
discs
bridge piece
roller tappet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE2018/100035
Other languages
German (de)
French (fr)
Inventor
Norbert Geyer
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 CN201880011696.4A priority Critical patent/CN110312862B/en
Priority to EP18702907.9A priority patent/EP3585998A1/en
Publication of WO2018153396A1 publication Critical patent/WO2018153396A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • F02M59/44Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/48Assembling; Disassembling; Replacing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404Details or component parts
    • F04B1/0408Pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404Details or component parts
    • F04B1/0426Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404Details or component parts
    • F04B1/0439Supporting or 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
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/053Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
    • 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
    • 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
    • F04B9/042Piston 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
    • 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
    • F01L1/143Tappets; Push rods for use with overhead camshafts

Definitions

  • the invention relates to a roller tappet, in particular for a high-pressure fuel pump or for a valve train of an internal combustion engine, with a housing which has at its drive-side end a loose role for a periodic Huber Weger which runs in a one piece to a bridge piece shell, which bridge piece the housing, connected in one piece therewith, protrudes through and in the direction of a driven-side end of the housing has a contact for a follower part and wherein the plunger has at least one separately joined Anlaufmit- tel for end faces of the roller.
  • a generic roller tappet here for a high-pressure fuel pump, is shown in DE 10 2012 212 579 A1, Fig. 1 A, 1 B out.
  • a snap ring is shown, which surrounds the roller directly on the front side and sits in an annular groove of the housing. The roller thus runs directly on a comparatively narrow inner shell of the snap ring.
  • FIGS. 1, 2 of DE 10 2006 028 348 B3 Another roller tappet with an immediate axial snap ring for its role is shown in FIGS. 1, 2 of DE 10 2006 028 348 B3.
  • the wire-like securing component is seated in a circumferential groove on the inner casing of the housing of the tappet. End sides of the roller run to the axial securing this in turn on the inside of the ring wire.
  • DE 10 2012 222 217 A1 discloses a roller tappet, from the cam-side bottom of which two opposite semicircle-like clips for axial fixing of the roller extend. From DE 10 201 1 083 571 A1 a built-up roller tappet can be removed whose roller is mounted in a pocket of a separate bottom, on which a retaining element is still pressed. Axially, the role is fixed by transverse walls of the support element.
  • DE 2 361 679 A shows a pump piston arrangement with a counter-rotating roller seated in a housing.
  • a voltage applied to a cam-distal bottom retaining clip engages an outer jacket of the plunger with two parallel axial fingers. Free ends of these fingers secure the role axially.
  • DE 10 2006 041 673 A1 discloses a roller tappet in a high-pressure pump with a roller running counter to an eccentric. The latter sits in a support pocket of the housing. In the contact area, special wear protection measures are provided.
  • roller tappet according to DE 10 2009 056 303 A1.
  • a lateral start-up for the roll takes place on specially prepared inner shell sections of a shirt of the housing.
  • the shell may skew during operation, must be kept separate and, in the worst case, may affect the roller's track.
  • the frontal start-up of the role on the housing designed as a manufacturing technology comparatively difficult.
  • this object is achieved in that two discs seated in recesses of a shirt of the housing are applied as starting means, against the insides of which the roller runs with its end faces, which discs are flush or indented to an outer jacket of the shirt of the housing arranged and fixed in position over at least one housing in a respectful annular groove whose outer sheath spanning circlip / snap ring, which also sits in a slot of the respective disc.
  • a simple holder for the discs is carried out according to the invention at the same time via at least one ring such as a snap ring in a corresponding annular groove of the housing.
  • the ring in turn sits in a slot-like groove of the respective disc, this fixing, a.
  • the discs can also be screwed, caulked, glued, soldered or welded.
  • the bridge piece extends directly from the upper, drive-side edge of the housing, so that a fine machining of the shell (grinding, finishing such as polishing, etc.) proves to be comparatively simple.
  • the further proposed axial passages in the bridge piece which may be hole-like, prevent "pumping" of the plunger during operation and in particular allow unimpeded passage of lubricant such as oil or fuel.
  • FIG. 1 shows an overall view of the plunger
  • FIGS. 2, 3 show longitudinal sections through the plunger, rotated by 90 ° with respect to one another and
  • FIG. 1 shows an overall view of the plunger
  • a roller tappet 1 for a high-pressure fuel pump of a quality-controlled internal combustion engine has a housing 2, which is penetrated at its drive-side end 3 of an integrally connected bridge piece 5.
  • a shell 18 is formed, in which a bolt-free roller 4 is seated rotatably for a lifting cam.
  • the bridge piece 5 In the direction of a driven-side end 6 of the housing 2, thus on a lower side, the bridge piece 5 has a dome-like offset system 7 for a pump piston as a follower part.
  • End faces 9 of the roller 4 run on inner sides 1 1 of separate discs 8 at. These sit in half-shell-like, upwardly open recesses 19 of a shirt 10 of the housing. 2
  • the discs 8 are flush with an outer jacket 12 of the shirt 10.
  • the two discs 8 are held by a snap ring 14, which is seated in slots 15 and in an annular groove 13 of the housing 2 is held.
  • the bridge piece 5 has two opposite to the roller 4 axial passages 16 for diesel fuel / oil. List of Reference Numbers) Roller Plunger

Landscapes

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

Abstract

A roller tappet (1), in particular for a high pressure fuel pump or for a valve train of an internal combustion engine, having a housing (2) which has a loose roller (4) at its drive-side end (3), wherein the tappet (1) has separately joined run-on means (8) for end sides (9) of the roller (4) which are present as two discs which are seated in recesses (19) of a skirt (10) of the housing (2) and against the inner sides (11) of which the roller (4) runs with the end sides (9) thereof, which discs (8) are arranged flush or recessed with respect to an outer shell (12) of the skirt (10) of the housing (2), and are positionally fixed via at least one securing ring/circlip (14) which wraps around the housing (2) in a respective annular groove (13) of the outer shell (12) thereof and is likewise seated in a slot (15) of the respective disc (8).

Description

Rollenstößel  roller plunger

Die Erfindung betrifft einen Rollenstößel, insbesondere für eine Kraftstoffhochdruckpumpe oder für einen Ventiltrieb einer Brennkraftmaschine, mit einem Gehäuse, wel- ches bei seiner antriebsseitigen Stirn eine lose Rolle für einen periodischen Huberzeuger hat, die in einer einteilig zu einem Brückenstück gehörenden Schale verläuft, welches Brückenstück das Gehäuse, hieran einteilig angebunden, durchragt sowie in Richtung zu einer abtriebsseitigen Stirn des Gehäuses eine Anlage für ein Stößelfolgeteil aufweist und wobei der Stößel über wenigstens ein separat gefügtes Anlaufmit- tel für Stirnseiten der Rolle verfügt. The invention relates to a roller tappet, in particular for a high-pressure fuel pump or for a valve train of an internal combustion engine, with a housing which has at its drive-side end a loose role for a periodic Huberzeuger which runs in a one piece to a bridge piece shell, which bridge piece the housing, connected in one piece therewith, protrudes through and in the direction of a driven-side end of the housing has a contact for a follower part and wherein the plunger has at least one separately joined Anlaufmit- tel for end faces of the roller.

Ein gattungsgemäßer Rollenstößel, hier für eine Kraftstoffhochdruckpumpe, geht aus der DE 10 2012 212 579 A1 , Fig. 1 A, 1 B hervor. Als separates Anlaufmittel ist ein Sprengring dargestellt, welcher die Rolle unmittelbar stirnseitig umgreift und in einer Ringnut des Gehäuses sitzt. Die Rolle läuft somit direkt an einem vergleichsweise schmalen Innenmantel des Sprengrings an. A generic roller tappet, here for a high-pressure fuel pump, is shown in DE 10 2012 212 579 A1, Fig. 1 A, 1 B out. As a separate starting means a snap ring is shown, which surrounds the roller directly on the front side and sits in an annular groove of the housing. The roller thus runs directly on a comparatively narrow inner shell of the snap ring.

Ein weiterer Rollenstößel mit einer unmittelbaren axialen Sprengringsicherung für dessen Rolle geht aus den Fig. 1 , 2 der DE 10 2006 028 348 B3 hervor. Das draht- ähnliche Sicherungsbauteil sitzt hierbei in einer Umlaufnut am Innenmantel des Gehäuses des Stößels. Stirnseiten der Rolle laufen zur Axialsicherung dieser wiederum innenseitig an dem Ringdraht an. Another roller tappet with an immediate axial snap ring for its role is shown in FIGS. 1, 2 of DE 10 2006 028 348 B3. In this case, the wire-like securing component is seated in a circumferential groove on the inner casing of the housing of the tappet. End sides of the roller run to the axial securing this in turn on the inside of the ring wire.

Bei den vorgenannten Gestaltungen erweist sich die axiale Fixierung der losen Rolle über das jeweilige Ringteil als zu instabil und Undefiniert. Gleichzeitig ist mit starkem Verschleiß im stirnseitigen Kontaktbereich zu rechnen. In the aforementioned designs, the axial fixation of the loose roller over the respective ring part proves to be too unstable and undefined. At the same time, heavy wear is to be expected in the frontal contact area.

Die DE 10 2012 222 217 A1 offenbart einen Rollenstößel, von dessen nockenseitigem Boden sich zwei gegenüberliegende, halbkreisähnliche Klips zur Axialfixierung der Rolle ausgehen. Aus der DE 10 201 1 083 571 A1 ist ein gebauter Rollenstößel entnehmbar, dessen Rolle in einer Tasche eines separaten Bodens gelagert ist, auf dem noch ein Halteelement eingepresst ist. Axial ist die Rolle durch Querwände des Stützelements fixiert. DE 10 2012 222 217 A1 discloses a roller tappet, from the cam-side bottom of which two opposite semicircle-like clips for axial fixing of the roller extend. From DE 10 201 1 083 571 A1 a built-up roller tappet can be removed whose roller is mounted in a pocket of a separate bottom, on which a retaining element is still pressed. Axially, the role is fixed by transverse walls of the support element.

Des Weiteren zeigt die DE 2 361 679 A eine Pumpenkolbenanordnung mit einer no- ckengegenlaufenden, in einem Gehäuse einsitzenden Rolle. Eine an einem nockenfernen Boden anliegende Halteklammer umgreift hierbei einen Außenmantel des Stößels mit zwei parallelen Axialfingern. Freie Enden dieser Finger sichern hierbei die Rolle axial. Furthermore, DE 2 361 679 A shows a pump piston arrangement with a counter-rotating roller seated in a housing. A voltage applied to a cam-distal bottom retaining clip engages an outer jacket of the plunger with two parallel axial fingers. Free ends of these fingers secure the role axially.

Zudem geht aus der DE 10 2006 041 673 A1 ein Rollenstößel in einer Hochdruckpumpe mit einer einem Exzenter gegenlaufenden Rolle hervor. Letztgenannte sitzt in einer Abstütztasche des Gehäuses. Im Kontaktbereich hierbei sind spezielle Ver- Schleißschutzmaßnahmen vorgesehen. In addition, DE 10 2006 041 673 A1 discloses a roller tappet in a high-pressure pump with a roller running counter to an eccentric. The latter sits in a support pocket of the housing. In the contact area, special wear protection measures are provided.

Schließlich wird auf den Rollenstößel nach der DE 10 2009 056 303 A1 verwiesen. In dessen nockenseitiger Aufnahme für die Rolle ist eine separate Schale zur unmittelbaren Lagerung der Rolle vorgesehen. Ein lateraler Anlauf für die Rolle erfolgt an spezi- eil hergerichteten Innenmantelabschnitten eines Hemdes des Gehäuses. Die Schale kann sich im Betrieb schiefstellen, muss separat gehalten werden und kann ungüns- tigstenfalls zu einer Beeinflussung der Laufbahn der Rolle führen. Außerdem gestaltet sich der stirnseitige Anlauf der Rolle am Gehäuse als fertigungstechnisch vergleichsweise schwierig. Finally, reference is made to the roller tappet according to DE 10 2009 056 303 A1. In the cam-side receptacle for the role of a separate shell for direct storage of the role is provided. A lateral start-up for the roll takes place on specially prepared inner shell sections of a shirt of the housing. The shell may skew during operation, must be kept separate and, in the worst case, may affect the roller's track. In addition, the frontal start-up of the role on the housing designed as a manufacturing technology comparatively difficult.

Es ist Aufgabe der Erfindung, einen Rollenstößel mit einer fest und verschleißarm fixierten losen Rolle zu kreieren. It is an object of the invention to create a roller tappet with a fixed and low-wear fixed loose role.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass als Anlaufmittel zwei in Ausnehmungen eines Hemdes des Gehäuses sitzende Scheiben appliziert sind, gegen deren Innenseiten die Rolle mit ihren Stirnseiten läuft, welche Scheiben bündig oder eingerückt zu einem Außenmantel des Hemdes des Gehäuses angeordnet sowie über wenigstens einen das Gehäuse in einer respektiven Ringnut dessen Außenmantels umspannenden Sicherungsring / Sprengring lagefixiert sind, der gleichfalls in einem Schlitz der jeweiligen Scheibe sitzt. According to the invention, this object is achieved in that two discs seated in recesses of a shirt of the housing are applied as starting means, against the insides of which the roller runs with its end faces, which discs are flush or indented to an outer jacket of the shirt of the housing arranged and fixed in position over at least one housing in a respectful annular groove whose outer sheath spanning circlip / snap ring, which also sits in a slot of the respective disc.

Durch diese Maßnahmen liegt ein Stößel ohne die zitierten Nachteile vor. Es kommt nicht mehr zu Lageabweichungen der leicht montierbaren Rolle. Der stirnseitige Rollenanlauf erfolgt nunmehr unmittelbar über„feste" Scheiben. Letztgenannte, welche auch lediglich nur scheibenähnlich sein können, lassen sich einfach, bspw. durch Prä- gen oder Stanzen, fertigen und zupaaren. These measures provide a plunger without the cited disadvantages. It no longer comes to positional deviations of easy mountable role. The end-face roller start now takes place directly via "fixed" washers, the latter, which can also only be disc-like, can be easily manufactured, for example by embossing or punching, and mated.

Eine simple Halterung für die Scheiben erfolgt erfindungsgemäß zugleich über wenigstens einen Ring wie einen Sprengring in einer entsprechenden Ringnut des Gehäuses. Der Ring wiederum sitzt in einer schlitzartigen Nut der jeweiligen Scheibe, diese fixierend, ein. Alternativ können die Scheiben auch eingeschraubt, verstemmt, verklebt, verlötet oder verschweißt sein. A simple holder for the discs is carried out according to the invention at the same time via at least one ring such as a snap ring in a corresponding annular groove of the housing. The ring in turn sits in a slot-like groove of the respective disc, this fixing, a. Alternatively, the discs can also be screwed, caulked, glued, soldered or welded.

Gemäß einer weiteren Fortbildung der Erfindung geht das Brückenstück unmittelbar vom oberen, antriebsseitigen Rand des Gehäuses aus, so dass sich eine Feinbearbei- tung der Schale (Schleifen, Finishen wie Polieren etc.) als vergleichsweise einfach erweist. According to a further development of the invention, the bridge piece extends directly from the upper, drive-side edge of the housing, so that a fine machining of the shell (grinding, finishing such as polishing, etc.) proves to be comparatively simple.

Die weiterhin vorgeschlagenen Axialdurchtritte im Brückenstück, welche lochartig sein können, verhindern ein„Aufpumpen" des Stößels im Betrieb und gestatten insbeson- dere einen ungehinderten Durchtritt von Schmiermittel wie Öl oder Kraftstoff. The further proposed axial passages in the bridge piece, which may be hole-like, prevent "pumping" of the plunger during operation and in particular allow unimpeded passage of lubricant such as oil or fuel.

Besonders vorteilhaft ist es hierbei, wenn die vorgenannten Scheiben zumindest an ihren Innenseiten mit einer Verschleißschutzschicht wie einer DLC-Schicht oder dergleichen versehen sind, so dass ein besonders reibungsarmer Rollenanlauf vorliegt. Klar ist, dass ggf. auch die Schale oder Rolle mit einer solchen Schicht versehen sein können. Die Erfindung geht aus der Zeichnung hervor. Es zeigen: It is particularly advantageous in this case if the aforementioned disks are provided at least on their insides with a wear protection layer such as a DLC layer or the like, so that there is a particularly low-friction roller start. It is clear that possibly also the shell or roll can be provided with such a layer. The invention is apparent from the drawing. Show it:

• Figur 1 eine räumliche Gesamtansicht des Stößels, · Figuren 2, 3 Längsschnitte durch den Stößel, zueinander um 90° gedreht und FIG. 1 shows an overall view of the plunger, FIGS. 2, 3 show longitudinal sections through the plunger, rotated by 90 ° with respect to one another and FIG

• Figur 4 den Stößel in Explosivdarstellung. 4 shows the ram in exploded view.

Dargestellt ist, s. insb. Fig. 1 , 4, ein Rollenstößel 1 für eine Kraftstoffhochdruckpumpe einer qualitätsgeregelten Brennkraftmaschine. Der Rollenstößel 1 hat ein Gehäuse 2, welches bei seiner antriebsseitigen Stirn 3 von einem einteilig angebundenen Brückenstück 5 durchragt ist. In Letztgenanntes ist eine Schale 18 eingeformt, in der eine bolzenfreie Rolle 4 für einen Hubnocken drehbar einsitzt. Shown is, s. In particular, Fig. 1, 4, a roller tappet 1 for a high-pressure fuel pump of a quality-controlled internal combustion engine. The roller tappet 1 has a housing 2, which is penetrated at its drive-side end 3 of an integrally connected bridge piece 5. In the latter, a shell 18 is formed, in which a bolt-free roller 4 is seated rotatably for a lifting cam.

In Richtung zu einer abtriebsseitigen Stirn 6 des Gehäuses 2, demnach an einer Un- terseite, hat das Brückenstück 5 eine domartig abgesetzte Anlage 7 für einen Pumpenkolben als Stößelfolgeteil. In the direction of a driven-side end 6 of the housing 2, thus on a lower side, the bridge piece 5 has a dome-like offset system 7 for a pump piston as a follower part.

Stirnseiten 9 der Rolle 4 laufen an Innenseiten 1 1 von separaten Scheiben 8 an. Diese sitzen in halbschalenartigen, nach oben offenen Ausnehmungen 19 eines Hemdes 10 des Gehäuses 2. End faces 9 of the roller 4 run on inner sides 1 1 of separate discs 8 at. These sit in half-shell-like, upwardly open recesses 19 of a shirt 10 of the housing. 2

Wie gut aus den Fig. 1 , 2 hervorgeht, verlaufen die Scheiben 8 bündig zu einem Außenmantel 12 des Hemdes 10. Dabei erfahren die beiden Scheiben 8 eine Halterung durch einen Sprengring 14, welcher in Schlitzen 15 dieser sitzt und in einer Ringnut 13 des Gehäuses 2 gehalten ist. As can be seen from FIGS. 1, 2, the discs 8 are flush with an outer jacket 12 of the shirt 10. The two discs 8 are held by a snap ring 14, which is seated in slots 15 and in an annular groove 13 of the housing 2 is held.

Schließlich ist zu bemerken, dass das Brückenstück 5 zwei sich an der Rolle 4 gegenüberliegende Axialdurchtritte 16 für Dieselkraftstoff / Öl hat. Liste der Bezugszahlen ) RollenstößelFinally, it should be noted that the bridge piece 5 has two opposite to the roller 4 axial passages 16 for diesel fuel / oil. List of Reference Numbers) Roller Plunger

) Gehäuse) Casing

) antriebsseitige Stirn) drive-side forehead

) Rolle) Role

) Brückenstück) Bridge piece

) abtriebsseitige Stirn) output-side forehead

) Anlage) Investment

) Anlaufmittel, Scheibe) Starting agent, disc

) Stirnseite) Front side

0) Hemd 0) shirt

1 ) lnnenseite1) inside

2) Außenmantel2) outer jacket

3) Ringnut Gehäuse3) Ring groove housing

4) Sicherungsring / Sprengring4) Circlip / snap ring

5) Schlitz Scheibe5) Slotted disc

6) Axialdurchtritt6) Axial passage

7) nicht vergeben7) not forgiven

8) Schale8) shell

9) Ausnehmung 9) recess

Claims

Patentansprüche claims Rollenstößel (1 ), insbesondere für eine Kraftstoffhochdruckpumpe oder für einen Ventiltrieb einer Brennkraftmaschine, mit einem Gehäuse (2), welches bei seiner antriebsseitigen Stirn (3) eine lose Rolle (4) für einen periodischen Huberzeuger hat, die in einer einteilig zu einem Brückenstück (5) gehörenden Schale (18) verläuft, welches Brückenstück (5) das Gehäuse (2), hieran einteilig angebunden, durchragt sowie in Richtung zu einer abtriebsseitigen Stirn (6) des Gehäuses (2) eine Anlage (7) für ein Stößelfolgeteil aufweist und wobei der Stößel (1 ) über wenigstens ein separat gefügtes Anlaufmittel (8) für Stirnseiten (9) der Rolle (4) verfügt, dadurch gekennzeichnet, dass als Anlaufmittel (8) zwei in Ausnehmungen (19) eines Hemdes (10) des Gehäuses (2) sitzende Scheiben appliziert sind, gegen deren Innenseiten (1 1 ) die Rolle (4) mit ihren Stirnseiten (9) läuft, welche Scheiben (8) bündig oder eingerückt zu einem Außenmantel (12) des Hemdes (10) des Gehäuses (2) angeordnet sowie über wenigstens einen das Gehäuse (2) in einer respektiven Ringnut (13) dessen Außenmantels (12) umspannenden Sicherungsring / Sprengring (14) lagefixiert sind, der gleichfalls in einem Schlitz (15) der jeweiligen Scheibe (8) sitzt. Roller tappet (1), in particular for a high-pressure fuel pump or for a valve train of an internal combustion engine, with a housing (2) having at its drive-side end (3) a loose roller (4) for a periodic Huberzeuger in one piece to a bridge piece (5) belonging shell (18) extends, which bridge piece (5) the housing (2), integrally connected thereto, penetrates and in the direction of a driven-side end (6) of the housing (2) has a system (7) for a follower part and wherein the plunger (1) has at least one separately joined starting means (8) for end faces (9) of the roller (4), characterized in that as start-up means (8) two in recesses (19) of a shirt (10) of the housing (2) seated discs are applied against whose inner sides (1 1) the roller (4) runs with their end faces (9), which discs (8) flush or indented to an outer jacket (12) of the shirt (10) of the Gehä uses (2) and at least one housing (2) in a respective annular groove (13) whose outer jacket (12) spanning circlip (snap ring (14) are fixed in position, which is also in a slot (15) of the respective disc (8). sitting. Rollenstößel nach Anspruch 1 , dadurch gekennzeichnet, dass das Brückenstück (5) das Gehäuse (2), nahe dessen antriebsseitiger Stirn (3) oder von dieser ausgehend, dachartig überspannt. Roller tappet according to claim 1, characterized in that the bridge piece (5) spans the housing (2), near its drive-side end (3) or starting from the same. Rollenstößel nach Anspruch 1 , dadurch gekennzeichnet, dass das Brückenstück (5) zumindest einen Axialdurchtritt (16) hat. Roller tappet according to claim 1, characterized in that the bridge piece (5) has at least one axial passage (16). Rollenstößel nach Anspruch 1 , dadurch gekennzeichnet, dass die Scheiben (8) zumindest an ihren Innenseiten (1 1 ) mit einer separat aufgetragenen DLC- Hartstoffschicht als Verschleißschutzschicht versehen sind. Roller tappet according to claim 1, characterized in that the discs (8) are provided at least on their inner sides (1 1) with a separately applied DLC hard material layer as a wear protection layer.
PCT/DE2018/100035 2017-02-21 2018-01-17 Roller tappet Ceased WO2018153396A1 (en)

Priority Applications (2)

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CN201880011696.4A CN110312862B (en) 2017-02-21 2018-01-17 Roller tappet
EP18702907.9A EP3585998A1 (en) 2017-02-21 2018-01-17 Roller tappet

Applications Claiming Priority (2)

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DE102017103483.8 2017-02-21
DE102017103483.8A DE102017103483B3 (en) 2017-02-21 2017-02-21 roller plunger

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WO2018153396A1 true WO2018153396A1 (en) 2018-08-30

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CN (1) CN110312862B (en)
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CN111749826A (en) * 2019-03-26 2020-10-09 罗伯特·博世有限公司 Roller tappets for high pressure fuel pumps
CN112576469B (en) * 2020-11-16 2022-12-16 中国航发西安动力控制科技有限公司 Plunger roller of inner curve radial plunger motor

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CN110312862A (en) 2019-10-08
CN110312862B (en) 2021-08-06
EP3585998A1 (en) 2020-01-01
DE102017103483B3 (en) 2018-01-04

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