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EP3094855B1 - Roller tappet device and method for producing a roller tappet device - Google Patents

Roller tappet device and method for producing a roller tappet device Download PDF

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Publication number
EP3094855B1
EP3094855B1 EP15721682.1A EP15721682A EP3094855B1 EP 3094855 B1 EP3094855 B1 EP 3094855B1 EP 15721682 A EP15721682 A EP 15721682A EP 3094855 B1 EP3094855 B1 EP 3094855B1
Authority
EP
European Patent Office
Prior art keywords
housing
bearing
roller
tappet
bearing shell
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.)
Not-in-force
Application number
EP15721682.1A
Other languages
German (de)
French (fr)
Other versions
EP3094855A1 (en
Inventor
Stefan Roider
Ludwig Kirschenhofer
Detlef Haupt
Christian Kemna
Martin Schmidt
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
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Publication date
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Publication of EP3094855A1 publication Critical patent/EP3094855A1/en
Application granted granted Critical
Publication of EP3094855B1 publication Critical patent/EP3094855B1/en
Not-in-force legal-status Critical Current
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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
    • F04B1/0413—Cams
    • F04B1/0417—Cams consisting of two or more cylindrical elements, e.g. rollers
    • 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

Definitions

  • the present invention relates to a roller tappet device for a pump and to a corresponding method for producing the roller tappet device.
  • US 2005/100466 A1 discloses a roller tappet device for a pump having a plunger comprising a plunger housing, a bearing shell and a roller, the roller being rotatably mounted in the bearing shell, and wherein the bearing shell has a pin disposed on a side facing away from the roller, the roller transmits a force from a drive device via the bearing shell to the plunger.
  • the object of the invention is to provide a roller tappet device for a pump, which contributes to a reliable and efficient operation of the pump. It is another object of the invention to provide a corresponding method for producing the roller tappet device.
  • the invention is characterized by a roller tappet device for a pump, comprising a plunger with a longitudinal axis, a plunger housing with an inner circumferential surface, a bearing shell with an outer circumferential surface, and a roller with a rotation axis.
  • the bearing shell has a bearing shell recess in which the roller is rotatably mounted. Furthermore, the bearing shell on a side facing away from the LagerschalenausEnglishung a pin which is received in a housing bearing of the plunger housing. The bearing shell is fixedly coupled to the plunger housing via an outer circumferential surface of the journal and an inner circumferential surface of the housing bearing.
  • the roller is supported on a drive device of the pump.
  • the roller is also designed to transmit a force from the drive device via the bearing shell to the plunger along the longitudinal axis during operation of the pump.
  • the pump is a high-pressure fuel pump, for example, a high-pressure diesel pump.
  • the drive device comprises in particular a cam on which the roller is supported, for example.
  • the roller tappet device is designed to convert a rotational movement of the cam into a linear movement along the longitudinal axis.
  • a diameter of the pin is less than 75% of a diameter of the inner surface of the Tappet housing. In a further embodiment, the diameter of the pin is in particular less than 35% of the diameter of the inner circumferential surface of the plunger housing.
  • the bearing shell and the plunger housing for example, have corresponding openings, which allow fluid flow along the longitudinal axis.
  • the outer circumferential surface of the pin and the inner circumferential surface of the housing bearing are fixedly coupled by means of a press fit.
  • the interference fit allows a reliable, cost-effective coupling of the bearing shell with the plunger housing.
  • the interference fit is an oil press dressing.
  • the bearing shell recess facing away from the bearing shell on a bearing shell stop surface.
  • the bearing shell facing side of the plunger housing has a housing stop surface. The bearing shell stop surface and the housing stop surface are formed parallel to each other.
  • the mutually parallel stop surfaces is contributed to a perpendicularity of a rotation axis of the roller and the longitudinal axis.
  • this enables an efficient and reliable operation of the roller tappet device.
  • the mutually parallel stop surfaces are parallel to the axis of rotation of the roller.
  • the inner lateral surface of the tappet housing is designed to limit an offset of the roller in the direction of the axis of rotation. Limiting the offset of the roller in the direction of the axis of rotation contributes to an efficient and reliable operation of the roller tappet device.
  • the inner circumferential surface of the plunger housing has two flat, mutually diametrical contact surfaces, which are designed to limit the displacement of the roller in the direction of the axis of rotation.
  • the roll is thus particularly efficiently contributed to limiting the offset.
  • the contact surfaces are in particular parallel to the longitudinal axis.
  • At least one bearing shell portion of the outer circumferential surface of the bearing shell and a respective housing portion of the inner circumferential surface of the plunger housing are formed parallel to each other curved so that a torque with respect to the longitudinal axis of the bearing shell on the plunger housing is transferable.
  • this helps to prevent a rotation of the bearing shell with respect to the plunger housing.
  • a Verwarbegrenzung the bearing shell contributes, for example, during assembly of the roller tappet device to the fact that the fixed coupling of the bearing shell can be done with the plunger housing.
  • functional decoupling of the Verfbegrenzung means of the outer circumferential surface of the bearing shell of the fixed coupling of the bearing shell by means of the outer circumferential surface of the pin, for example, a variable geometry of the inner circumferential surface of the plunger housing is made possible, so that a particularly advantageous limitation of the offset of the role in the direction of the axis of rotation is contributed.
  • the outer circumferential surface of the bearing shell for limiting the rotation is rotationally asymmetrical with respect to the longitudinal axis.
  • the at least one bearing shell part region and the respective housing part region are planar.
  • the outer circumferential surface of the bearing shell has at least two diametrically parallel flat bearing shell subareas, and the inner lateral surface of the tappet housing corresponding thereto in each case at least two diametrically parallel planar housing subregions.
  • the at least one bearing shell portion and the at least one housing portion may also be referred to as key surfaces.
  • the invention is characterized by a method for producing a roller tappet device for a pump according to the first aspect, wherein a plunger with a longitudinal axis, a plunger housing with an inner circumferential surface, a bearing shell with an outer circumferential surface, and a roller with a rotation axis to be provided.
  • the bearing shell has a bearing shell recess in which the roller is rotatably mounted. Furthermore, the bearing shell on a side facing away from the LagerschalenausEnglishung a pin which is received in a housing bearing of the plunger housing. The bearing shell is coupled via an outer circumferential surface of the pin and an inner circumferential surface of the housing bearing with the plunger housing fixed by means of press fit.
  • the roller is supported on a drive device of the pump.
  • the roller tappet device has a VerFDbegrenzung of the bearing shell with respect to the plunger housing, for example by at least one bearing shell portion of the outer circumferential surface of the bearing shell and a respective housing portion of the inner circumferential surface of the plunger housing are formed parallel to each other curved such that a torque with respect to the longitudinal axis of the bearing shell on the Tappet housing is transferable, it is helped that a compression of the bearing shell can be directed with the plunger housing.
  • the bearing shell is initially aligned by means of the VerFDbegrenzung with respect to the plunger housing and then pressed.
  • a roller tappet device 1 for a pump in particular for a high-pressure fuel pump, comprises a tappet 3 with a longitudinal axis L (FIG. FIG. 1 ).
  • the roller tappet device 1 further comprises a plunger housing 5, a bearing shell 7, and a roller 9, which are arranged, for example, axially symmetrical with respect to the longitudinal axis L.
  • the pump is, for example, a high-pressure diesel pump. In other embodiments, the pump is, for example, a gasoline high pressure pump.
  • the pump has, for example, a drive device, a pump housing, and a piston (not shown in detail).
  • the piston of the pump is coupled, for example, with the plunger 3.
  • the drive device comprises, for example, a shaft with a cam on which the roller is supported.
  • a rotational movement of the cam is converted into a linear movement of the roller tappet device 1 along the longitudinal axis L.
  • the roller 9 is rotatably mounted in this context about a rotational axis D, so that contributes to a low-friction rolling of the cam.
  • the plunger housing 5 is guided with its outer circumferential surface 10 in the pump housing, so that during operation of the pump to a precise linear movement of the roller tappet device along the longitudinal axis L is contributed.
  • a force transmission of the cam takes place during operation of the pump via the roller tappet device 1 on the piston.
  • the bearing shell 7 has a pin 11 with an outer circumferential surface 12. On the pin 11 sits, for example, the Plunger 3, so that a substantially translation-free power line is made possible by the bearing shell 7 on the piston.
  • the bearing shell 7 also has, for example, at least one bearing shell opening 13, which allows a fluid flow along the longitudinal axis L ( FIG. 2 ). Furthermore, the bearing shell 7 has two opposite bearing shell portions 15 on its outer circumferential surface 16, a bearing shell stop surface 17, and facing away from this a LagerschalenausANSung 19, which is adapted to receive the roller 9.
  • the plunger housing 5 is designed to receive the bearing shell 7.
  • the plunger housing 5 has a housing bearing 21 with an inner circumferential surface 22 ( FIG. 3 ), in which the pin 11 is inserted.
  • the plunger housing 5, for example, further comprises at least one housing opening 23, which corresponds in particular to the respective bearing shell opening 13.
  • the plunger housing 5 has two opposite housing partial regions 25 on its inner lateral surface 26, which correspond to the bearing shell partial regions 15 of the bearing shell 7. Furthermore, the plunger housing 5 has a housing stop surface 27, which corresponds to the bearing shell stop surface 17 of the bearing shell 7.
  • the outer circumferential surface 16 of the bearing shell 7 and the inner circumferential surface 26 of the tappet housing 5 are in particular rotationally asymmetric with respect to the longitudinal axis L.
  • rotation of the bearing shell 7 is limited in the plunger housing 5 about the longitudinal axis L. Furthermore, this allows alignment of the bearing shell 7 with respect to the tappet housing 5 during assembly of the roller tappet device 1.
  • bearing shell portions 15 and the housing portions 25 are flat and parallel to each other.
  • the bearing shell portions 15 and the housing portions 25 may also be referred to as a key surface-like geometry.
  • the housing abutment surface 27 limits an offset of the bearing shell 7 along the longitudinal axis L with respect to the plunger housing 5 in the direction of the plunger 3.
  • the housing abutment surface 27 is for example on the bearing shell stop surface 17.
  • the bearing shell stop surface 17 and the housing stop surface 27 are parallel to each other in this context, in particular parallel to the axis of rotation D of the roller 9.
  • a precise alignment of the bearing shell 7 with the roller 9 with respect to the longitudinal axis L allows.
  • a perpendicularity of the axis of rotation D with respect to the longitudinal axis L is contributed.
  • the outer circumferential surface 12 of the pin 11 is fixedly coupled to the inner lateral surface 22 of the housing bearing 21.
  • the bearing shell 7 is fixed in particular via a press fit on the outer circumferential surface 12 of the pin 11 with the plunger housing 5 on the inner circumferential surface 22 of the housing bearing 21, wherein a diameter of the press dressing is less than 75% of a diameter of the outer circumferential surface 16 of the bearing shell 7.
  • the diameter of the press fit is less than 35% of the diameter of the outer circumferential surface 16 of the bearing shell 7.
  • surfaces of the bearing shell 7 and the plunger housing 5 for aligning the bearing shell 7 with respect to the plunger housing 5 are functionally separated from surfaces for fixing the bearing shell 7 with respect to the plunger housing 5. This allows a variable design of the inner circumferential surface 26 of the plunger housing 5, in particular with regard to on the storage of the roll 9.
  • the inner lateral surface 26 of the tappet housing 5 is formed in this context to limit an offset of the roller 9 in the direction of the axis of rotation D.
  • the inner lateral surface 26 of the tappet housing 5 has contact surfaces 29 opposite thereto (see also FIGS FIG. 1 ).
  • the contact surfaces 29 may be formed, for example, each as a flat contact surface with respect to the roller 9.
  • FIG. 4 shows a perspective view of the roller tappet device 1 according to FIG. 1 along the longitudinal axis L.
  • a roller tappet device 1 allows a decoupling of the press assembly from the outer circumferential surface 10 of the tappet housing 5 for guidance in the pump housing.
  • a decoupling of the press dressing from a bearing surface 30 (see FIG. 2 ) of the bearing shell recess 19 allows for radial roller guide.
  • such a roller tappet device 1 contributes to an immediate power line between the piston and the bearing shell 7.

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  • 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)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Description

Die vorliegende Erfindung betrifft eine Rollenstößelvorrichtung für eine Pumpe sowie ein korrespondierendes Verfahren zur Herstellung der Rollenstößelvorrichtung.The present invention relates to a roller tappet device for a pump and to a corresponding method for producing the roller tappet device.

US 2005/100466 A1 offenbart eine Rollenstößelvorrichtung für eine Pumpe mit einem Stößel, der ein Stößelgehäuse, eine Lagerschale und eine Rolle aufweist, wobei die Rolle drehbar in der Lagerschale gelagert ist, und wobei die Lagerschale einen auf einer von der Rolle abgewandten Seite angeordneten Zapfen aufweist, wobei die Rolle eine Kraft von einer Antriebseinrichtung über die Lagerschale an den Stößel überträgt. US 2005/100466 A1 discloses a roller tappet device for a pump having a plunger comprising a plunger housing, a bearing shell and a roller, the roller being rotatably mounted in the bearing shell, and wherein the bearing shell has a pin disposed on a side facing away from the roller, the roller transmits a force from a drive device via the bearing shell to the plunger.

Aufgabe der Erfindung ist es, eine Rollenstößelvorrichtung für eine Pumpe zu schaffen, die zu einem zuverlässigen und effizienten Betrieb der Pumpe beiträgt. Ferner ist es Aufgabe der Erfindung ein korrespondierendes Verfahren zur Herstellung der Rollenstößelvorrichtung zu schaffen.The object of the invention is to provide a roller tappet device for a pump, which contributes to a reliable and efficient operation of the pump. It is another object of the invention to provide a corresponding method for producing the roller tappet device.

Die Aufgabe wird gelöst durch die Merkmale der unabhängigen Patentansprüche. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.The object is solved by the features of the independent claims. Advantageous developments of the invention are characterized in the subclaims.

Gemäß einem ersten Aspekt zeichnet sich die Erfindung aus durch eine Rollenstößelvorrichtung für eine Pumpe, umfassend einen Stößel mit einer Längsachse, ein Stößelgehäuse mit einer Innenmantelfläche, eine Lagerschale mit einer Außenmantelfläche, und eine Rolle mit einer Drehachse.According to a first aspect, the invention is characterized by a roller tappet device for a pump, comprising a plunger with a longitudinal axis, a plunger housing with an inner circumferential surface, a bearing shell with an outer circumferential surface, and a roller with a rotation axis.

Die Lagerschale weist eine Lagerschalenausnehmung auf, in der die Rolle drehbar gelagert ist. Des Weiteren weist die Lagerschale auf einer der Lagerschalenausnehmung abgewandten Seite einen Zapfen auf, der in einem Gehäuselager des Stößelgehäuses aufgenommen ist. Die Lagerschale ist über eine Außenmantelfläche des Zapfens und eine Innenmantelfläche des Gehäuselagers mit dem Stößelgehäuse fix gekoppelt.The bearing shell has a bearing shell recess in which the roller is rotatably mounted. Furthermore, the bearing shell on a side facing away from the Lagerschalenausnehmung a pin which is received in a housing bearing of the plunger housing. The bearing shell is fixedly coupled to the plunger housing via an outer circumferential surface of the journal and an inner circumferential surface of the housing bearing.

Die Rolle stützt sich an einer Antriebseinrichtung der Pumpe ab. Die Rolle ist ferner ausgebildet, im Betrieb der Pumpe eine Kraft von der Antriebseinrichtung über die Lagerschale an den Stößel entlang der Längsachse zu übertragen.The roller is supported on a drive device of the pump. The roller is also designed to transmit a force from the drive device via the bearing shell to the plunger along the longitudinal axis during operation of the pump.

Durch eine Fixierung der Lagerschale mit dem Stößelgehäuse wird dazu beigetragen ein Kippen der Lagerschale in dem Stößelgehäuse zu vermeiden.By fixing the bearing shell with the plunger housing is helped to avoid tilting of the bearing shell in the plunger housing.

Durch die Fixierung der Lagerschale mit dem Stößelgehäuse mittels fixer Kopplung über die Außenmantelfläche des Zapfens und der Innenmantelfläche des Gehäuselagers wird eine Entkopplung der Fixierung von einer Lagerung der Rolle ermöglicht. Ferner wird durch die fixe Kopplung über die Außenmantelfläche des Zapfens und der Innenmantelfläche des Gehäuselagers eine Entkopplung der Fixierung von einer Führung des Stößelgehäuses entlang der Längsachse ermöglicht. Des Weiteren wird durch die fixe Kopplung über die Außenmantelfläche des Zapfens und der Innenmantelfläche des Gehäuselagers zu einer unmittelbaren Kraftleitung zwischen der Lagerschale und dem Stößel beigetragen, so dass beispielsweise eine übersetzungsfreie Kraftleitung zwischen der Rolle und einem an einer der Lagerschale abgewandten Seite des Stößels angeordneten Kolben der Pumpe ermöglicht wird.By fixing the bearing shell with the plunger housing by means of a fixed coupling over the outer circumferential surface of the journal and the inner circumferential surface of the housing bearing, a decoupling of the fixation of a bearing of the roller is made possible. Furthermore, a decoupling of the fixation of a guide of the plunger housing along the longitudinal axis is made possible by the fixed coupling on the outer circumferential surface of the pin and the inner circumferential surface of the housing bearing. Furthermore, the fixed coupling via the outer lateral surface of the journal and the inner lateral surface of the housing bearing contributes to an immediate power line between the bearing shell and the tappet, so that, for example, a transmission-free power line between the roller and a piston of the tappet facing away from the bearing shell the pump is enabled.

Insbesondere ist die Pumpe eine Kraftstoffhochdruckpumpe, beispielsweise eine Dieselhochdruckpumpe. Die Antriebseinrichtung umfasst insbesondere einen Nocken, auf dem sich die Rolle beispielsweise abstützt. In vorteilhafter Weise ist die Rollenstößelvorrichtung ausgebildet, eine Rotationsbewegung des Nockens in eine Linearbewegung entlang der Längsachse umzusetzen.In particular, the pump is a high-pressure fuel pump, for example, a high-pressure diesel pump. The drive device comprises in particular a cam on which the roller is supported, for example. Advantageously, the roller tappet device is designed to convert a rotational movement of the cam into a linear movement along the longitudinal axis.

In einer Ausführungsform beträgt ein Durchmesser des Zapfens weniger als 75% eines Durchmessers der Innenmantelfläche des Stößelgehäuses. In einer weiteren Ausführungsform beträgt der Durchmesser des Zapfens insbesondere weniger als 35% des Durchmessers der Innenmantelfläche des Stößelgehäuses.In one embodiment, a diameter of the pin is less than 75% of a diameter of the inner surface of the Tappet housing. In a further embodiment, the diameter of the pin is in particular less than 35% of the diameter of the inner circumferential surface of the plunger housing.

Die Lagerschale sowie das Stößelgehäuse weisen beispielsweise korrespondierende Öffnungen auf, die einen Fluidfluss entlang der Längsachse ermöglichen.The bearing shell and the plunger housing, for example, have corresponding openings, which allow fluid flow along the longitudinal axis.

In einer vorteilhaften Ausgestaltung gemäß dem ersten Aspekt sind die Außenmantelfläche des Zapfens und die Innenmantelfläche des Gehäuselagers mittels eines Pressverbands fix gekoppelt.In an advantageous embodiment according to the first aspect, the outer circumferential surface of the pin and the inner circumferential surface of the housing bearing are fixedly coupled by means of a press fit.

Der Pressverband ermöglicht eine zuverlässige, kostengünstige Kopplung der Lagerschale mit dem Stößelgehäuse. Insbesondere ist der Pressverband ein Ölpressverband.The interference fit allows a reliable, cost-effective coupling of the bearing shell with the plunger housing. In particular, the interference fit is an oil press dressing.

In einer weiteren vorteilhaften Ausgestaltung gemäß dem ersten Aspekt weist die der Lagerschalenausnehmung abgewandte Seite der Lagerschale eine Lagerschalenanschlagfläche auf. Ferner weist die der Lagerschale zugewandte Seite des Stößelgehäuses eine Gehäuseanschlagfläche auf. Die Lagerschalenanschlagfläche und die Gehäuseanschlagfläche sind parallel zueinander ausgebildet.In a further advantageous embodiment according to the first aspect, the bearing shell recess facing away from the bearing shell on a bearing shell stop surface. Further, the bearing shell facing side of the plunger housing has a housing stop surface. The bearing shell stop surface and the housing stop surface are formed parallel to each other.

Durch die zueinander parallelen Anschlagflächen wird zu einer Rechtwinkligkeit einer Drehachse der Rolle und der Längsachse beigetragen. In vorteilhafter Weise wird dadurch ein effizienter und zuverlässiger Betrieb der Rollenstößelvorrichtung ermöglicht. Insbesondere sind die zueinander parallelen Anschlagflächen parallel zu der Drehachse der Rolle.By the mutually parallel stop surfaces is contributed to a perpendicularity of a rotation axis of the roller and the longitudinal axis. Advantageously, this enables an efficient and reliable operation of the roller tappet device. In particular, the mutually parallel stop surfaces are parallel to the axis of rotation of the roller.

In einer weiteren vorteilhaften Ausgestaltung gemäß dem ersten Aspekt ist die Innenmantelfläche des Stößelgehäuses ausgebildet einen Versatz der Rolle in Richtung der Drehachse zu begrenzen. Eine Begrenzung des Versatzes der Rolle in Richtung der Drehachse trägt zu einem effizienten und zuverlässigen Betrieb der Rollenstößelvorrichtung bei.In a further advantageous embodiment according to the first aspect, the inner lateral surface of the tappet housing is designed to limit an offset of the roller in the direction of the axis of rotation. Limiting the offset of the roller in the direction of the axis of rotation contributes to an efficient and reliable operation of the roller tappet device.

In einer weiteren vorteilhaften Ausgestaltung gemäß dem ersten Aspekt weist die Innenmantelfläche des Stößelgehäuses zwei ebene, zueinander diametrale Anlaufflächen auf, die ausgebildet sind den Versatz der Rolle in Richtung der Drehachse zu begrenzen.In a further advantageous embodiment according to the first aspect, the inner circumferential surface of the plunger housing has two flat, mutually diametrical contact surfaces, which are designed to limit the displacement of the roller in the direction of the axis of rotation.

In vorteilhafter Weise wird so besonders effizient zur Begrenzung des Versatzes der Rolle beigetragen. Die Anlaufflächen sind dabei insbesondere parallel zu der Längsachse.Advantageously, the roll is thus particularly efficiently contributed to limiting the offset. The contact surfaces are in particular parallel to the longitudinal axis.

In einer weiteren vorteilhaften Ausgestaltung gemäß dem ersten Aspekt sind zumindest ein Lagerschalenteilbereich der Außenmantelfläche der Lagerschale sowie ein jeweiliger Gehäuseteilbereich der Innenmantelfläche des Stößelgehäuses parallel zueinander derart gekrümmt ausgebildet, dass ein Drehmoment bezüglich der Längsachse von der Lagerschale auf das Stößelgehäuse übertragbar ist.In a further advantageous embodiment according to the first aspect, at least one bearing shell portion of the outer circumferential surface of the bearing shell and a respective housing portion of the inner circumferential surface of the plunger housing are formed parallel to each other curved so that a torque with respect to the longitudinal axis of the bearing shell on the plunger housing is transferable.

In vorteilhafter Weise wird dadurch dazu beigetragen, eine Verdrehung der Lagerschale bezüglich des Stößelgehäuses zu vermeiden. Eine derartige Verdrehbegrenzung der Lagerschale trägt beispielsweise bei einer Montage der Rollenstößelvorrichtung dazu bei, dass die fixe Kopplung der Lagerschale mit dem Stößelgehäuse gerichtet erfolgen kann. Durch funktionale Entkopplung der Verdrehbegrenzung mittels der Außenmantelfläche der Lagerschale von der fixen Kopplung der Lagerschale mittels der Außenmantelfläche des Zapfens wird beispielsweise eine variable Geometrie der Innenmantelfläche des Stößelgehäuses ermöglicht, so dass zu einer besonders vorteilhaften Begrenzung des Versatzes der Rolle in Richtung der Drehachse beigetragen wird.Advantageously, this helps to prevent a rotation of the bearing shell with respect to the plunger housing. Such a Verdrehbegrenzung the bearing shell contributes, for example, during assembly of the roller tappet device to the fact that the fixed coupling of the bearing shell can be done with the plunger housing. By functional decoupling of the Verdrehbegrenzung means of the outer circumferential surface of the bearing shell of the fixed coupling of the bearing shell by means of the outer circumferential surface of the pin, for example, a variable geometry of the inner circumferential surface of the plunger housing is made possible, so that a particularly advantageous limitation of the offset of the role in the direction of the axis of rotation is contributed.

Insbesondere ist die Außenmantelfläche der Lagerschale zur Begrenzung der Verdrehung dabei rotationsasymmetrisch bezüglich der Längsachse ausgebildet.In particular, the outer circumferential surface of the bearing shell for limiting the rotation is rotationally asymmetrical with respect to the longitudinal axis.

In einer weiteren vorteilhaften Ausgestaltung gemäß dem ersten Aspekt sind der zumindest eine Lagerschalenteilbereich sowie der jeweilige Gehäuseteilbereich eben ausgebildet.In a further advantageous embodiment according to the first aspect, the at least one bearing shell part region and the respective housing part region are planar.

In vorteilhafter Weise wird so besonders kostengünstig zu einer Vermeidung der Verdrehung der Lagerschale beigetragen. Insbesondere weist die Außenmantelfläche der Lagerschale mindestens zwei diametral parallele ebene Lagerschalenteilbereiche, sowie die Innenmantelfläche des Stößelgehäuses dazu korrespondierend jeweils mindestens zwei diametral parallele ebene Gehäuseteilbereiche auf. Der mindestens eine Lagerschalenteilbereich sowie der mindestens eine Gehäuseteilbereich können auch als Schlüsselflächen bezeichnet werden.Advantageously, a particularly cost-effective contribution to avoiding the rotation of the bearing shell is made. In particular, the outer circumferential surface of the bearing shell has at least two diametrically parallel flat bearing shell subareas, and the inner lateral surface of the tappet housing corresponding thereto in each case at least two diametrically parallel planar housing subregions. The at least one bearing shell portion and the at least one housing portion may also be referred to as key surfaces.

Gemäß einem zweiten Aspekt zeichnet sich die Erfindung aus durch ein Verfahren zur Herstellung einer Rollenstößelvorrichtung für eine Pumpe gemäß dem ersten Aspekt, bei dem ein Stößel mit einer Längsachse, ein Stößelgehäuse mit einer Innenmantelfläche, eine Lagerschale mit einer Außenmantelfläche, und eine Rolle mit einer Drehachse bereitgestellt werden.According to a second aspect, the invention is characterized by a method for producing a roller tappet device for a pump according to the first aspect, wherein a plunger with a longitudinal axis, a plunger housing with an inner circumferential surface, a bearing shell with an outer circumferential surface, and a roller with a rotation axis to be provided.

Die Lagerschale weist eine Lagerschalenausnehmung auf, in der die Rolle drehbar gelagert wird. Des Weiteren weist die Lagerschale auf einer der Lagerschalenausnehmung abgewandten Seite einen Zapfen auf, der in einem Gehäuselager des Stößelgehäuses aufgenommen wird. Die Lagerschale wird über eine Außenmantelfläche des Zapfens und eine Innenmantelfläche des Gehäuselagers mit dem Stößelgehäuse mittels Pressverband fix gekoppelt.The bearing shell has a bearing shell recess in which the roller is rotatably mounted. Furthermore, the bearing shell on a side facing away from the Lagerschalenausnehmung a pin which is received in a housing bearing of the plunger housing. The bearing shell is coupled via an outer circumferential surface of the pin and an inner circumferential surface of the housing bearing with the plunger housing fixed by means of press fit.

Die Rolle wird an einer Antriebseinrichtung der Pumpe abgestützt.The roller is supported on a drive device of the pump.

Im Falle, dass die Rollenstößelvorrichtung eine Verdrehbegrenzung der Lagerschale bezüglich des Stößelgehäuses aufweist, beispielsweise indem zumindest ein Lagerschalenteilbereich der Außenmantelfläche der Lagerschale sowie ein jeweiliger Gehäuseteilbereich der Innenmantelfläche des Stößelgehäuses parallel zueinander derart gekrümmt ausgebildet sind, dass ein Drehmoment bezüglich der Längsachse von der Lagerschale auf das Stößelgehäuse übertragbar ist, wird dazu beigetragen, dass ein Verpressen der Lagerschale mit dem Stößelgehäuse gerichtet erfolgen kann. Beispielsweise wird die Lagerschale mittels der Verdrehbegrenzung bezüglich des Stößelgehäuses zunächst ausgerichtet und anschließend verpresst.In the case that the roller tappet device has a Verdrehbegrenzung of the bearing shell with respect to the plunger housing, for example by at least one bearing shell portion of the outer circumferential surface of the bearing shell and a respective housing portion of the inner circumferential surface of the plunger housing are formed parallel to each other curved such that a torque with respect to the longitudinal axis of the bearing shell on the Tappet housing is transferable, it is helped that a compression of the bearing shell can be directed with the plunger housing. For example, the bearing shell is initially aligned by means of the Verdrehbegrenzung with respect to the plunger housing and then pressed.

Ausführungsbeispiele der Erfindung sind im Folgenden anhand der schematischen Zeichnungen erläutert.Embodiments of the invention are explained below with reference to the schematic drawings.

Es zeigen:

Figur 1
ein Längsschnitt einer Rollenstößelvorrichtung,
Figur 2
eine perspektivische Darstellung einer Lagerschale der Rollenstößelvorrichtung gemäß Figur 1,
Figur 3
eine perspektivische Darstellung eines Stößelgehäuses der Rollenstößelvorrichtung gemäß Figur 1, und
Figur 4
eine perspektivische Darstellung der Rollenstößelvorrichtung gemäß Figur 1.
Show it:
FIG. 1
a longitudinal section of a roller tappet device,
FIG. 2
a perspective view of a bearing shell of the roller tappet device according to FIG. 1 .
FIG. 3
a perspective view of a plunger housing of the roller tappet device according to FIG. 1 , and
FIG. 4
a perspective view of the roller tappet device according to FIG. 1 ,

Elemente gleicher Konstruktion oder Funktion sind figurenübergreifend mit den gleichen Bezugszeichen versehen.Elements of the same construction or function are provided across the figures with the same reference numerals.

Eine Rollenstößelvorrichtung 1 für eine Pumpe, insbesondere für eine Kraftstoffhochdruckpumpe umfasst einen Stößel 3 mit einer Längsachse L (Figur 1). Die Rollenstößelvorrichtung 1 weist ferner ein Stößelgehäuse 5, eine Lagerschale 7, sowie eine Rolle 9 auf, die beispielsweise achssymmetrisch bezüglich der Längsachse L angeordnet sind.A roller tappet device 1 for a pump, in particular for a high-pressure fuel pump, comprises a tappet 3 with a longitudinal axis L (FIG. FIG. 1 ). The roller tappet device 1 further comprises a plunger housing 5, a bearing shell 7, and a roller 9, which are arranged, for example, axially symmetrical with respect to the longitudinal axis L.

Bei der Pumpe handelt es sich beispielsweise um eine Dieselhochdruckpumpe. In anderen Ausführungsbeispielen ist die Pumpe beispielsweise eine Benzinhochdruckpumpe.The pump is, for example, a high-pressure diesel pump. In other embodiments, the pump is, for example, a gasoline high pressure pump.

Die Pumpe weist beispielsweise eine Antriebseinrichtung, ein Pumpengehäuse, sowie einen Kolben auf (nicht näher dargestellt). Der Kolben der Pumpe ist dabei beispielsweise mit dem Stößel 3 gekoppelt.The pump has, for example, a drive device, a pump housing, and a piston (not shown in detail). The piston of the pump is coupled, for example, with the plunger 3.

Die Antriebseinrichtung umfasst beispielsweise eine Welle mit einem Nocken, auf dem sich die Rolle abstützt. Im Betrieb der Pumpe wird eine Rotationsbewegung des Nockens in eine Linearbewegung der Rollenstößelvorrichtung 1 entlang der Längsachse L umgesetzt. Insbesondere ist die Rolle 9 in diesem Zusammenhang drehbar um eine Drehachse D gelagert, so dass zu einem reibungsarmen Abrollen des Nockens beigetragen wird.The drive device comprises, for example, a shaft with a cam on which the roller is supported. During operation of the pump, a rotational movement of the cam is converted into a linear movement of the roller tappet device 1 along the longitudinal axis L. In particular, the roller 9 is rotatably mounted in this context about a rotational axis D, so that contributes to a low-friction rolling of the cam.

Ferner ist beispielsweise das Stößelgehäuse 5 mit seiner Außenmantelfläche 10 in dem Pumpengehäuse geführt, so dass im Betrieb der Pumpe zu einer präzisen Linearbewegung der Rollenstößelvorrichtung entlang der Längsachse L beigetragen wird. Insbesondere erfolgt eine Kraftübertragung des Nockens im Betrieb der Pumpe über die Rollenstößelvorrichtung 1 auf den Kolben.Further, for example, the plunger housing 5 is guided with its outer circumferential surface 10 in the pump housing, so that during operation of the pump to a precise linear movement of the roller tappet device along the longitudinal axis L is contributed. In particular, a force transmission of the cam takes place during operation of the pump via the roller tappet device 1 on the piston.

Die Lagerschale 7 weist einen Zapfen 11 mit einer Außenmantelfläche 12 auf. Auf dem Zapfen 11 sitzt beispielsweise der Stößel 3 auf, so dass eine im Wesentlichen übersetzungsfreie Kraftleitung von der Lagerschale 7 auf den Kolben ermöglicht wird.The bearing shell 7 has a pin 11 with an outer circumferential surface 12. On the pin 11 sits, for example, the Plunger 3, so that a substantially translation-free power line is made possible by the bearing shell 7 on the piston.

Die Lagerschale 7 weist beispielsweise ferner mindestens eine Lagerschalenöffnung 13 auf, die einen Fluidstrom entlang der Längsachse L ermöglicht (Figur 2). Des Weiteren weist die Lagerschale 7 zwei gegenüberliegende Lagerschalenteilbereiche 15 an ihrer Außenmantelfläche 16, eine Lagerschalenanschlagfläche 17, sowie von dieser abgewandt eine Lagerschalenausnehmung 19 auf, die ausgebildet ist die Rolle 9 aufzunehmen.The bearing shell 7 also has, for example, at least one bearing shell opening 13, which allows a fluid flow along the longitudinal axis L ( FIG. 2 ). Furthermore, the bearing shell 7 has two opposite bearing shell portions 15 on its outer circumferential surface 16, a bearing shell stop surface 17, and facing away from this a Lagerschalenausnehmung 19, which is adapted to receive the roller 9.

Das Stößelgehäuse 5 ist ausgebildet die Lagerschale 7 aufzunehmen. In diesem Zusammenhang weist das Stößelgehäuse 5 ein Gehäuselager 21 mit einer Innenmantelfläche 22 auf (Figur 3), in welches der Zapfen 11 eingeführt wird. Das Stößelgehäuse 5 weist beispielsweise ferner mindestens eine Gehäuseöffnung 23 auf, die insbesondere zu der jeweiligen Lagerschalenöffnung 13 korrespondiert.The plunger housing 5 is designed to receive the bearing shell 7. In this context, the plunger housing 5 has a housing bearing 21 with an inner circumferential surface 22 ( FIG. 3 ), in which the pin 11 is inserted. The plunger housing 5, for example, further comprises at least one housing opening 23, which corresponds in particular to the respective bearing shell opening 13.

Des Weiteren weist das Stößelgehäuse 5 zwei gegenüberliegende Gehäuseteilbereiche 25 an seiner Innenmantelfläche 26 auf, die zu den Lagerschalenteilbereichen 15 der Lagerschale 7 korrespondieren. Ferner weist das Stößelgehäuse 5 eine Gehäuseanschlagfläche 27 auf, die zu der Lagerschalenanschlagfläche 17 der Lagerschale 7 korrespondiert.Furthermore, the plunger housing 5 has two opposite housing partial regions 25 on its inner lateral surface 26, which correspond to the bearing shell partial regions 15 of the bearing shell 7. Furthermore, the plunger housing 5 has a housing stop surface 27, which corresponds to the bearing shell stop surface 17 of the bearing shell 7.

Mittels der Lagerschalenteilbereiche 15 beziehungsweise der Gehäuseteilbereiche 25 sind die Außenmantelfläche 16 der Lagerschale 7 sowie die Innenmantelfläche 26 des Stößelgehäuses 5 insbesondere rotationsasymmetrisch bezüglich der Längsachse L ausgebildet. In vorteilhafter Weise wird dadurch ein Verdrehen der Lagerschale 7 in dem Stößelgehäuse 5 um die Längsachse L begrenzt. Ferner ermöglicht dies eine Ausrichtung der Lagerschale 7 bezüglich des Stößelgehäuses 5 bei einer Montage der Rollenstößelvorrichtung 1.By means of the bearing shell subregions 15 or the housing subregions 25, the outer circumferential surface 16 of the bearing shell 7 and the inner circumferential surface 26 of the tappet housing 5 are in particular rotationally asymmetric with respect to the longitudinal axis L. Advantageously, thereby rotation of the bearing shell 7 is limited in the plunger housing 5 about the longitudinal axis L. Furthermore, this allows alignment of the bearing shell 7 with respect to the tappet housing 5 during assembly of the roller tappet device 1.

Insbesondere sind die Lagerschalenteilbereiche 15 sowie die Gehäuseteilbereiche 25 dabei eben und parallel zueinander ausgebildet. Die Lagerschalenteilbereiche 15 sowie die Gehäuseteilbereiche 25 können auch als schlüsselflächenartige Geometrie bezeichnet werden.In particular, the bearing shell portions 15 and the housing portions 25 are flat and parallel to each other. The bearing shell portions 15 and the housing portions 25 may also be referred to as a key surface-like geometry.

Die Gehäuseanschlagfläche 27 begrenzt einen Versatz der Lagerschale 7 entlang der Längsachse L bezüglich des Stößelgehäuses 5 in Richtung des Stößels 3. Die Gehäuseanschlagfläche 27 liegt dazu beispielsweise auf der Lagerschalenanschlagfläche 17 auf. Die Lagerschalenanschlagfläche 17 sowie die Gehäuseanschlagfläche 27 sind in diesem Zusammenhang parallel zueinander ausgebildet, insbesondere parallel zu der Drehachse D der Rolle 9. In vorteilhafter Weise wird so eine präzise Ausrichtung der Lagerschale 7 mit der Rolle 9 bezüglich der Längsachse L ermöglicht. Insbesondere wird zu einer Rechtwinkligkeit der Drehachse D bezüglich der Längsachse L beigetragen.The housing abutment surface 27 limits an offset of the bearing shell 7 along the longitudinal axis L with respect to the plunger housing 5 in the direction of the plunger 3. The housing abutment surface 27 is for example on the bearing shell stop surface 17. The bearing shell stop surface 17 and the housing stop surface 27 are parallel to each other in this context, in particular parallel to the axis of rotation D of the roller 9. Advantageously, a precise alignment of the bearing shell 7 with the roller 9 with respect to the longitudinal axis L allows. In particular, a perpendicularity of the axis of rotation D with respect to the longitudinal axis L is contributed.

Beispielsweise erfolgt bei der Montage der Rollenstößelvorrichtung 1 nach Ausrichtung der Lagerschale 7 bezüglich des Stößelgehäuses 5 eine Fixierung der Lagerschale 7 bezüglich des Stößelgehäuses 5, so dass eine Bewegung der Lagerschale 7 bezüglich des Stößelgehäuses 5 in Richtung der Drehachse D oder senkrecht zu der Drehachse D und der Längsachse L im Wesentlichen vermieden wird.For example, during assembly of the roller tappet device 1 after alignment of the bearing shell 7 with respect to the plunger housing 5, a fixation of the bearing shell 7 with respect to the plunger housing 5, so that a movement of the bearing shell 7 with respect to the plunger housing 5 in the direction of the rotation axis D or perpendicular to the rotation axis D and the longitudinal axis L is substantially avoided.

Dabei wird insbesondere die Außenmantelfläche 12 des Zapfens 11 mit der Innenmantelfläche 22 des Gehäuselagers 21 fix gekoppelt. Die Lagerschale 7 wird insbesondere über einen Pressverband an der Außenmantelfläche 12 des Zapfens 11 mit dem Stößelgehäuse 5 an der Innenmantelfläche 22 des Gehäuselagers 21 fixiert, wobei ein Durchmesser des Pressverbands weniger als 75 % eines Durchmessers der Außenmantelfläche 16 der Lagerschale 7 beträgt. Insbesondere beträgt der Durchmesser des Pressverbands weniger als 35 % des Durchmessers der Außenmantelfläche 16 der Lagerschale 7.In particular, the outer circumferential surface 12 of the pin 11 is fixedly coupled to the inner lateral surface 22 of the housing bearing 21. The bearing shell 7 is fixed in particular via a press fit on the outer circumferential surface 12 of the pin 11 with the plunger housing 5 on the inner circumferential surface 22 of the housing bearing 21, wherein a diameter of the press dressing is less than 75% of a diameter of the outer circumferential surface 16 of the bearing shell 7. In particular, the diameter of the press fit is less than 35% of the diameter of the outer circumferential surface 16 of the bearing shell 7.

In vorteilhafter Weise sind Flächen der Lagerschale 7 beziehungsweise des Stößelgehäuses 5 zur Ausrichtung der Lagerschale 7 bezüglich des Stößelgehäuses 5 funktional getrennt von Flächen zur Fixierung der Lagerschale 7 bezüglich des Stößelgehäuses 5. Dies ermöglicht eine variable Gestaltung der Innenmantelfläche 26 des Stößelgehäuses 5, insbesondere im Hinblick auf die Lagerung der Rolle 9.Advantageously, surfaces of the bearing shell 7 and the plunger housing 5 for aligning the bearing shell 7 with respect to the plunger housing 5 are functionally separated from surfaces for fixing the bearing shell 7 with respect to the plunger housing 5. This allows a variable design of the inner circumferential surface 26 of the plunger housing 5, in particular with regard to on the storage of the roll 9.

Im Betrieb der Pumpe wirkt beispielsweise eine Kraft auf die Rolle 9 in Richtung der Drehachse D. Die Innenmantelfläche 26 des Stößelgehäuses 5 ist in diesem Zusammenhang ausgebildet einen Versatz der Rolle 9 in Richtung der Drehachse D zu begrenzen. Insbesondere weist die Innenmantelfläche 26 des Stößelgehäuses 5 dazu gegenüberliegende Anlaufflächen 29 auf (siehe auch Figur 1).During operation of the pump, for example, a force acts on the roller 9 in the direction of the axis of rotation D. The inner lateral surface 26 of the tappet housing 5 is formed in this context to limit an offset of the roller 9 in the direction of the axis of rotation D. In particular, the inner lateral surface 26 of the tappet housing 5 has contact surfaces 29 opposite thereto (see also FIGS FIG. 1 ).

Durch funktionale Trennung jeweiliger Flächen zur Ausrichtung und Fixierung der Lagerschale 7 bezüglich des Stößelgehäuses 5 können die Anlaufflächen 29 beispielsweise jeweils als ebene Kontaktfläche bezüglich der Rolle 9 ausgebildet sein.By functional separation of respective surfaces for alignment and fixation of the bearing shell 7 with respect to the plunger housing 5, the contact surfaces 29 may be formed, for example, each as a flat contact surface with respect to the roller 9.

Figur 4 zeigt eine perspektivische Darstellung der Rollenstößelvorrichtung 1 gemäß Figur 1 entlang der Längsachse L. In vorteilhafter Weise ermöglicht eine derartige Rollenstößelvorrichtung 1 eine Entkopplung des Pressverbands von der Außenmantelfläche 10 des Stößelgehäuses 5 zur Führung in dem Pumpengehäuse. Zudem wird eine Entkopplung des Pressverbands von einer Lagermantelfläche 30 (siehe Figur 2) der Lagerschalenausnehmung 19 zur radialen Rollenführung ermöglicht. Ferner trägt eine derartige Rollenstößelvorrichtung 1 zu einer unmittelbaren Kraftleitung zwischen dem Kolben und der Lagerschale 7 bei. FIG. 4 shows a perspective view of the roller tappet device 1 according to FIG. 1 along the longitudinal axis L. Advantageously, such a roller tappet device 1 allows a decoupling of the press assembly from the outer circumferential surface 10 of the tappet housing 5 for guidance in the pump housing. In addition, a decoupling of the press dressing from a bearing surface 30 (see FIG. 2 ) of the bearing shell recess 19 allows for radial roller guide. Furthermore, such a roller tappet device 1 contributes to an immediate power line between the piston and the bearing shell 7.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Rollenstößelroller plunger
33
Stößeltappet
55
Stößelgehäusetappet housing
77
Lagerschalebearing shell
99
Rollerole
1010
Außenmantelfläche StößelgehäuseOuter jacket surface Plunger housing
1111
Zapfenspigot
1212
Außenmantelfläche ZapfenOuter lateral surface pin
1313
LagerschalenöffnungBearing shell opening
1515
LagerschalenteilbereichBearing shell portion
1616
Außenmantelfläche LagerschaleOuter shell surface bearing shell
1717
LagerschalenanschlagflächeBush stop surface
1919
LagerschalenausnehmungLagerschalenausnehmung
2121
Gehäuselagerbearing Units
2222
Innenmantelfläche GehäuselagerInner lateral surface housing bearing
2323
Gehäuseöffnunghousing opening
2525
GehäuseteilbereichHousing section
2626
Innenmantelfläche StößelgehäuseInner lateral surface Plunger housing
2727
GehäuseanschlagflächeHousing stop surface
2929
Anlaufflächeapproach surface
3030
LagermantelflächeBearing shell surface
LL
Längsachselongitudinal axis
DD
Drehachseaxis of rotation

Claims (8)

  1. Roller tappet device (1) for a pump, comprising
    - a tappet (3) having a longitudinal axis (L);
    - a tappet housing (5) having an internal surface area (26);
    - a bearing shell (7) having an external surface area (16); and
    - a roller (9) having a rotation axis (D), wherein
    - the bearing shell (7) has a bearing-shell clearance (19) in which the roller (9) is rotatably mounted;
    - the bearing shell (7) on a side that faces away from the bearing-shell clearance (19) has a journal (11);
    - the roller (9) is supported on a drive installation of the pump and during operation of the pump is configured so as to transmit a force along the longitudinal axis (L) from the drive installation by way of the bearing shell (7) to the tappet (3);
    characterized in that the journal (11) is received in a housing bearing (21) of the tappet housing (5), and in that the bearing shell (7) by way of an external surface area (12) of the journal (11), and of an internal surface area (22) of the housing bearing (21) is fixedly coupled to the tappet housing (5).
  2. Roller tappet device (1) according to Claim 1, in which the external surface area (12) of the journal (11) and the internal surface area (22) of the housing bearing (21) are fixedly coupled by means of an interference fit assembly.
  3. Roller tappet device (1) according to one of preceding Claims 1 or 2, in which that side of the bearing shell (7) that faces away from the bearing-shell clearance (19) has a bearing-shell stop face (17), and that side of the tappet housing (5) that faces the bearing shell (7) has a housing stop face (27), wherein the bearing-shell stop face (17) and the housing stop face (27) are configured so as to be mutually parallel.
  4. Roller tappet device (1) according to one of preceding claims 1 to 3, in which the internal surface area (26) of the tappet housing (5) is configured so as to restrict a displacement of the roller (9) in the direction of the rotation axis (D).
  5. Roller tappet device (1) according to Claim 4, in which the internal surface area (26) of the tappet housing (5) has two planar and mutually diametrical thrust surfaces (29) which are configured so as to restrict the displacement of the roller (9) in the direction of the rotation axis (D).
  6. Roller tappet device (1) according to one of preceding Claims 1 to 5, in which at least one bearing-shell part-region (15) of the external surface area (16) of the bearing shell (7), and a respective housing part-region (25) of the internal surface area (26) of the tappet housing (5) are configured so as to be curved in parallel in relation to one another in such a manner that a torque in relation to the longitudinal axis (L) is transmittable from the bearing shell (7) to the tappet housing (5).
  7. Roller tappet device (1) according to Claim 6, in which the at least one bearing-shell part-region (15) and the respective housing part-region (25) are configured so as to be planar.
  8. Method for producing a roller tappet device (1) for a pump, according to one of preceding Claims 1 to 7, in which
    - a tappet (3) having a longitudinal axis (L);
    - a tappet housing (5) having an internal surface area (26);
    - a bearing shell (7) having an external surface area (16); and
    - a roller (9) having a rotation axis (D) are provided, wherein
    - the bearing shell (7) has a bearing-shell clearance (19) in which the roller (9) is rotatably mounted;
    the bearing shell (7) on a side that faces away from the bearing-shell clearance (19) has a journal (11) which is received in a housing bearing (21) of the tappet housing (5), wherein the bearing shell (7) by way of an external surface area (12) of the journal (11), and of an internal surface area (22) of the housing bearing (21) is fixedly coupled to the tappet housing (5) by means of an interference fit assembly; and
    - the roller (9) is supported on a drive installation of the pump.
EP15721682.1A 2014-10-15 2015-05-06 Roller tappet device and method for producing a roller tappet device Not-in-force EP3094855B1 (en)

Applications Claiming Priority (2)

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DE102014220881.5A DE102014220881A1 (en) 2014-10-15 2014-10-15 Roller tappet device and method of manufacturing a roller tappet device
PCT/EP2015/059891 WO2016058712A1 (en) 2014-10-15 2015-05-06 Roller tappet device and method for producing a roller tappet device

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EP (1) EP3094855B1 (en)
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DE102019118891A1 (en) * 2019-07-12 2021-01-14 Schaeffler Technologies AG & Co. KG Roller tappet for a high pressure fuel pump

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US20170204824A1 (en) 2017-07-20
WO2016058712A1 (en) 2016-04-21
KR20160132985A (en) 2016-11-21
CN106103986B (en) 2017-11-28
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EP3094855A1 (en) 2016-11-23
CN106103986A (en) 2016-11-09

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