EP3094855B1 - Dispositif de poussoir à galet et procédé de production de dispositif de poussoir à galet - Google Patents

Dispositif de poussoir à galet et procédé de production de dispositif de poussoir à galet 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)
English (en)
Other versions
EP3094855A1 (fr
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
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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP3094855A1 publication Critical patent/EP3094855A1/fr
Application granted granted Critical
Publication of EP3094855B1 publication Critical patent/EP3094855B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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.

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

Claims (8)

  1. Dispositif de poussoir à galet (1) pour une pompe, comprenant
    - un poussoir (3) avec un axe longitudinal (L),
    - un boîtier de poussoir (5) avec une surface latérale intérieure (26),
    - une coquille de palier (7) avec une surface latérale extérieure (16), et
    - un galet (9) avec un axe de rotation (D), dans lequel
    - la coquille de palier (7) présente un évidement de coquille de palier (19), dans lequel le galet (9) est monté de façon rotative,
    - la coquille de palier (7) présente un tourillon (11) sur un côté opposé à l'évidement de coquille de palier (19), et
    - le galet (9) s'appuie sur un dispositif d'entraînement de la pompe et est configuré pour transmettre, lorsque la pompe est en fonctionnement, une force du dispositif d'entraînement via la coquille de palier (7) au poussoir (3) le long de l'axe longitudinal (L),
    caractérisé en ce que le tourillon (11) est logé dans un palier de boîtier (21) du boîtier de poussoir (5), et en ce que la coquille de palier (7) est couplée de façon fixe au boîtier de poussoir (5) par l'intermédiaire d'une surface latérale extérieure (12) du tourillon (11) et d'une surface latérale intérieure (22) du palier de boîtier (21).
  2. Dispositif de poussoir à galet (1) selon la revendication 1, dans lequel la surface latérale extérieure (12) du tourillon (11) et la surface latérale intérieure (22) du palier de boîtier (21) sont couplées de façon fixe au moyen d'un joint à ajustement serré.
  3. Dispositif de poussoir à galet (1) selon l'une quelconque des revendications précédentes 1 ou 2, dans lequel le côté de la coquille de palier (7) détourné de l'évidement de coquille de palier (19) présente une face de butée de coquille de palier (17) et le côté du boîtier de poussoir (5) tourné vers la coquille de palier (7) présente une face de butée de boîtier (27), dans lequel la face de butée de coquille de palier (17) et la face de butée de boîtier (27) sont formées parallèlement l'une à l'autre.
  4. Dispositif de poussoir à galet (1) selon l'une quelconque des revendications précédentes 1 à 3, dans lequel la surface latérale intérieure (26) du boîtier de poussoir (5) est configurée pour limiter un décalage du galet (9) dans la direction de l'axe de rotation (D).
  5. Dispositif de poussoir à galet (1) selon la revendication 4, dans lequel la surface latérale intérieure (26) du boîtier de poussoir (5) présente deux faces d'arrêt planes (29) opposées diamétralement l'une à l'autre, qui sont configurées pour limiter le décalage du galet (9) dans la direction de l'axe de rotation (D).
  6. Dispositif de poussoir à galet (1) selon l'une quelconque des revendications précédentes 1 à 5, dans lequel au moins une région partielle de coquille de palier (15) de la surface latérale extérieure (16) de la coquille de palier (7) ainsi qu'une région partielle de boîtier respective (25) de la surface latérale intérieure (26) du boîtier de poussoir (5) sont réalisées sous forme incurvée parallèlement l'une à l'autre, de telle manière qu'un couple de rotation par rapport à l'axe longitudinal (L) puisse être transmis de la coquille de palier (7) au boîtier de poussoir (5).
  7. Dispositif de poussoir à galet (1) selon la revendication 6, dans lequel ladite au moins une région partielle de coquille de palier (15) ainsi que la région partielle de boîtier respective (25) sont réalisées sous forme plane.
  8. Procédé de fabrication d'un dispositif de poussoir à galet (1) pour une pompe selon l'une quelconque des revendications précédentes 1 à 7, dans lequel on prépare
    - un poussoir (3) avec un axe longitudinal (L),
    - un boîtier de poussoir (5) avec une surface latérale intérieure (26),
    - une coquille de palier (7) avec une surface latérale extérieure (16), et
    - un galet (9) avec un axe de rotation (D),
    dans lequel
    - la coquille de palier (7) présente un évidement de coquille de palier (19), dans lequel on monte le galet (9) de façon rotative,
    - la coquille de palier (7) présente sur un côté opposé à l'évidement de coquille de palier (19) un tourillon (11), qui est logé dans un palier de boîtier (21) du boîtier de poussoir (5), dans lequel on couple de façon fixe la coquille de palier (7) au boîtier de poussoir (5) par l'intermédiaire d'une surface latérale extérieure (12) du tourillon (11) et d'une surface latérale intérieure (22) du palier de boîtier (21) au moyen d'un ajustement serré, et
    - on appuie le galet (9) sur un dispositif d'entraînement de la pompe.
EP15721682.1A 2014-10-15 2015-05-06 Dispositif de poussoir à galet et procédé de production de dispositif de poussoir à galet Not-in-force EP3094855B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014220881.5A DE102014220881A1 (de) 2014-10-15 2014-10-15 Rollenstößelvorrichtung und Verfahren zur Herstellung einer Rollenstößelvorrichtung
PCT/EP2015/059891 WO2016058712A1 (fr) 2014-10-15 2015-05-06 Dispositif de poussoir à galet et procédé de production de dispositif de poussoir à galet

Publications (2)

Publication Number Publication Date
EP3094855A1 EP3094855A1 (fr) 2016-11-23
EP3094855B1 true EP3094855B1 (fr) 2018-07-11

Family

ID=53175034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15721682.1A Not-in-force EP3094855B1 (fr) 2014-10-15 2015-05-06 Dispositif de poussoir à galet et procédé de production de dispositif de poussoir à galet

Country Status (6)

Country Link
US (1) US20170204824A1 (fr)
EP (1) EP3094855B1 (fr)
KR (1) KR101908832B1 (fr)
CN (1) CN106103986B (fr)
DE (1) DE102014220881A1 (fr)
WO (1) WO2016058712A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102019102289B3 (de) 2019-01-30 2020-03-05 Schaeffler Technologies AG & Co. KG Rollenstößel für eine Kraftstoffpumpe
DE102019118891A1 (de) * 2019-07-12 2021-01-14 Schaeffler Technologies AG & Co. KG Rollenstößel für eine Kraftstoffhochdruckpumpe

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US5566652A (en) * 1995-10-06 1996-10-22 Eaton Corporation Light weight cam follower
SI9600292A (sl) * 1996-10-02 1998-04-30 Mag. Manfreda Jurij, Dipl.Ing. Batni sklop radialno-batnega hidravličnega stroja
EP1557558B1 (fr) * 2002-10-29 2018-01-31 Bosch Automotive Systems Corporation Pompe d'alimentation en carburant et corps à structure poussoir
EP1582735A4 (fr) * 2003-01-09 2006-06-07 Bosch Automotive Systems Corp Pompe d'alimentation en combustible
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Also Published As

Publication number Publication date
CN106103986B (zh) 2017-11-28
US20170204824A1 (en) 2017-07-20
CN106103986A (zh) 2016-11-09
KR20160132985A (ko) 2016-11-21
KR101908832B1 (ko) 2018-10-16
EP3094855A1 (fr) 2016-11-23
DE102014220881A1 (de) 2016-04-21
WO2016058712A1 (fr) 2016-04-21

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