EP2333337A2 - Piston à rouleaux - Google Patents

Piston à rouleaux Download PDF

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Publication number
EP2333337A2
EP2333337A2 EP20100192318 EP10192318A EP2333337A2 EP 2333337 A2 EP2333337 A2 EP 2333337A2 EP 20100192318 EP20100192318 EP 20100192318 EP 10192318 A EP10192318 A EP 10192318A EP 2333337 A2 EP2333337 A2 EP 2333337A2
Authority
EP
European Patent Office
Prior art keywords
roller
housing
roller tappet
tappet according
piece
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.)
Withdrawn
Application number
EP20100192318
Other languages
German (de)
English (en)
Inventor
Stefan Dorn
Norber Geyer
Karsten Kucht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2333337A2 publication Critical patent/EP2333337A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0421—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0439—Supporting or guiding means for the pistons

Definitions

  • the invention relates to a roller tappet, in particular for a high-pressure fuel pump or a valve train in each case a quality or quantity-controlled internal combustion engine, with a housing which is immanent at its drive-side end a cam or eccentric cam roller serving, which, seen in the housing direction, the Housing is penetrated below the role of a bridge piece, which has on one of its output side end of the housing facing an end face a plant for a ram follower part and wherein the drive-side end of the housing, at least in the peripheral portion of end faces of the roller, is about half a roller height.
  • a generic roller tappet goes out of the DE 32 47 026 A1 out.
  • a roller sits in a cylindrical pocket of a drive side of a housing. The latter protrudes with its drive-side end half the height of the role, which role is taken in a one-piece connected to the housing bridge piece.
  • An axial securing of the roller is provided by separate pins.
  • roller tappet It is disadvantageous in the case of the aforementioned roller tappet that it can only be produced in a complicated manner in mass production. Thus, the drive-side end of the housing does not completely run around and it must be tolerated extremely tight. Angular deviations of the surrounding construction also have a disadvantageous effect, so that wear-increasing "edge carriers" are to be expected or must also be tolerated with high precision in this section. In addition, it is found that the roller tappet is unnecessarily massive.
  • the object of the invention is therefore to provide a roller tappet of the aforementioned type, in which the cited disadvantages are eliminated.
  • a roller tappet is to be created, which is easy to build, is well suited for mass production and is inexpensive to represent.
  • this object is achieved in that in an at least partially complementary indentation of a drive side further end face of the bridge piece a shell piece separated from a ring sits like a half or third shell, in which the roller is slidably mounted, wherein the drive-side end of the housing, at least the end faces of the roller, collar-like radially inwardly directed and on the inner surface of the housing, a receiving area is shown, behind which the roller extends with their end faces.
  • roller tappet in which the aforementioned disadvantages are eliminated.
  • the component according to the invention corresponds to very good stiffness lightweight requirements, can be easily and cheaply finished and allowed by the separate and particularly inexpensive representable shell piece a easy way to compensate for angular errors while excellent power in the roller tappet. There is an introduction of force via the roller directly on the underlying shell in the lifting direction with bridge piece.
  • the role can be snapped with their faces behind the receiving areas of the housing.
  • the proposed ring may be a rolling ring which is present as a cheap mass-produced article.
  • Wälzring u. a. a cam follower ring from the valve train technology use, as it is also found on rocker arms or roller tappets.
  • the standard component is subjected to a separation process such as cracking so that, for example, two or three shell pieces are present per rolling ring. Possibly.
  • the shell piece can also be made directly as such.
  • roller tappet according to the invention is intended, for example, to follow a periodic lift generator such as a cam or eccentric in a high-speed high-pressure fuel pump.
  • a periodic lift generator such as a cam or eccentric in a high-speed high-pressure fuel pump.
  • the roller tappet can also be used as a cam follower in a valve train of an internal combustion engine (passenger car, truck) (cup o. Roller tappet with top or bottom camshaft).
  • the drive-side end of the housing should protrude beyond half a roller height and run inwardly in a collar-like manner all around.
  • two easily representable pockets are proposed in the inner casing of the housing, in which the role is snapped with their faces over the collar.
  • the bags can, for example. be generated in a simple stamping or machining. Possibly. can also be dispensed with the bags.
  • the housing of the roller tappet is made of a lightweight material such as steel by deep drawing technology.
  • the housing be extruded or machined.
  • the roll may be in the form of a ring or cylinder.
  • a ring or cylinder In the case of their ring training at the same time given the aforementioned contact freedom whose center areas on the end faces and reduces the ram mass.
  • the shell-like storage of the role leads to a good contact pattern.
  • the roller tappet is ideal for use in today's high-speed pumps.
  • the bridge piece may be designed as a one-piece transverse web with an optional, for example, knob-like system on its underside for a ram follower part. Such a design is, inter alia, in its Fierpresstechnischer production in question. However, it is also a separate bridge piece provided. This can be present, inter alia, as a thin-walled sheet metal part, which is correspondingly connected to the housing.
  • the shell piece is held over a simple Ausfsch in the indentation.
  • short protrusions such as lugs may protrude from the bridge piece to a corresponding separation end of the shell piece.
  • security parts which may also emanate from the inner shell of the housing, thought.
  • Another subclaim relates to perforations such as holes in the bridge piece. These prevent on the one hand an unnecessary formation of an air cushion in the oscillating axial movement of the roller tappet and allow a liquid passage (oil, fuel). On the other hand, these perforations reduce the mass of the roller tappet. Possibly. can also be the housing of the ram perforated to minimize weight.
  • roller tappet 1 As it is used as a counter-rotor for a cam or eccentric in a high-pressure fuel pump (for example, for the promotion of diesel fuel).
  • the roller tappet 1 has a substantially cylindrical housing 2, via whose outer casing 20 a guide takes place in a receptacle of the high-pressure fuel pump or a surrounding construction.
  • the housing 2 In the region of a drive-side end 3, the housing 2 is transversely penetrated by a roller 4, which sits at both ends in receiving areas 13 of an inner jacket 12 of the housing 2 designed as pockets.
  • the latter stands with its all-round drive-side forehead 3 well beyond half a roller height addition.
  • the forehead 3 is directed inwardly like a collar. Behind the forehead 3, the roller 4 is snapped with their end faces 14 and thus held there.
  • An axial start-up of the roller 4 is designed such that a center region whose end faces 14 are not in contact with the receiving regions 13.
  • the roller 4 is slidably mounted in a shell piece 11, which is separated from a present as a standard element Wälzring. Cracking is proposed as the separating process, so that two or three shell pieces 11 can be generated per rolling ring.
  • the shell piece 11 in turn is located in a complementary, here cylindrical indentation 9 an end face 10 of an integrally connected to the housing 2 bridge piece 5.
  • a stroke transmission via the roller 4 in the lying in the bridge piece 5 shell piece 11 to the pump piston, wherein at a lower end side. 7 On the side of a driven-side end 6 of the housing 2, the bridge piece 5 has a system 8, to which a shaft of the aforementioned pump piston rests directly in the installation case.
  • an outer shell 15 of the shell piece 11 is slightly flattened at the ends, so that the angle error compensation, as previously described, a slight mobility of the shell piece 11 relative to the indentation 9 is given.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20100192318 2009-11-30 2010-11-24 Piston à rouleaux Withdrawn EP2333337A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910056303 DE102009056303A1 (de) 2009-11-30 2009-11-30 Rollenstößel

Publications (1)

Publication Number Publication Date
EP2333337A2 true EP2333337A2 (fr) 2011-06-15

Family

ID=43857839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100192318 Withdrawn EP2333337A2 (fr) 2009-11-30 2010-11-24 Piston à rouleaux

Country Status (2)

Country Link
EP (1) EP2333337A2 (fr)
DE (1) DE102009056303A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013060494A1 (fr) * 2011-10-26 2013-05-02 Schaeffler Technologies AG & Co. KG Poussoir à galet
WO2016097230A1 (fr) * 2014-12-17 2016-06-23 Poclain Hydraulics Industrie Piston à galet monobloc et procédé associé

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010019982A1 (de) * 2010-05-10 2011-11-10 Schaeffler Technologies Gmbh & Co. Kg Rollenstößel
DE102010019983A1 (de) 2010-05-10 2011-11-10 Schaeffler Technologies Gmbh & Co. Kg Rollenstößel
DE102011082434A1 (de) 2011-09-09 2013-03-14 Schaeffler Technologies AG & Co. KG Stößel
DE102012207088B4 (de) 2012-04-27 2021-11-18 Schaeffler Technologies AG & Co. KG Rollenstößel für eine Kraftstoffhochdruckpumpe mit einer Ausdrehsiche-rung für ein teilringförmiges Schalensegment zur Lagerung der Rolle
DE102013215455A1 (de) 2013-08-06 2015-02-12 Schaeffler Technologies Gmbh & Co. Kg Nockenfolger
DE102017103481B4 (de) * 2017-02-21 2018-10-31 Schaeffler Technologies AG & Co. KG Verfahren zur Herstellung von Gehäusen für Rollenstößel
DE102017103483B3 (de) 2017-02-21 2018-01-04 Schaeffler Technologies AG & Co. KG Rollenstößel
DE102017129430A1 (de) 2017-12-11 2019-06-13 Schaeffler Technologies AG & Co. KG Stößel einer Kraftstoffhochdruckpumpe oder eines Ventiltriebs einer Brennkraftmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3247026A1 (de) 1982-12-18 1984-06-20 Klöckner-Humboldt-Deutz AG, 5000 Köln Elastischer rollenstoessel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3247026A1 (de) 1982-12-18 1984-06-20 Klöckner-Humboldt-Deutz AG, 5000 Köln Elastischer rollenstoessel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013060494A1 (fr) * 2011-10-26 2013-05-02 Schaeffler Technologies AG & Co. KG Poussoir à galet
CN103917769A (zh) * 2011-10-26 2014-07-09 舍弗勒技术有限两合公司 滚轮挺杆
WO2016097230A1 (fr) * 2014-12-17 2016-06-23 Poclain Hydraulics Industrie Piston à galet monobloc et procédé associé

Also Published As

Publication number Publication date
DE102009056303A1 (de) 2011-06-01

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