EP1669555A2 - Poussoir de soupape pour moteur à combustion interne et procédé de mise en oeuvre - Google Patents

Poussoir de soupape pour moteur à combustion interne et procédé de mise en oeuvre Download PDF

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Publication number
EP1669555A2
EP1669555A2 EP05024494A EP05024494A EP1669555A2 EP 1669555 A2 EP1669555 A2 EP 1669555A2 EP 05024494 A EP05024494 A EP 05024494A EP 05024494 A EP05024494 A EP 05024494A EP 1669555 A2 EP1669555 A2 EP 1669555A2
Authority
EP
European Patent Office
Prior art keywords
shirt
rotation element
tappet
sheet metal
recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05024494A
Other languages
German (de)
English (en)
Other versions
EP1669555A3 (fr
EP1669555B1 (fr
Inventor
Thomas Schleeh
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 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 KG filed Critical Schaeffler KG
Publication of EP1669555A2 publication Critical patent/EP1669555A2/fr
Publication of EP1669555A3 publication Critical patent/EP1669555A3/fr
Application granted granted Critical
Publication of EP1669555B1 publication Critical patent/EP1669555B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/143—Tappets; Push rods for use with overhead camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2307/00—Preventing the rotation of tappets

Definitions

  • the invention relates to a tappet for an internal combustion engine according to the preamble of claim 1. Furthermore, the invention relates to a method for producing such a tappet.
  • tappets with anti-rotation elements are known for example from DE 28 29 423 C2, DE 41 15 670 A1, DE 43 24 756 C2, DE 195 01 061 A1, DE 199 57 772 A1, DE 101 23 966 A1 and DE 43 37 330 A1.
  • the invention has for its object to provide a non-rotating cup tappet, which ensures a simple production possibility of the cup, in particular the recess of the shirt, and / or anti-rotation element easy installation, a good function and high reliability.
  • Another object of the invention is to propose a simple and inexpensive method for producing a tappet.
  • bucket tappet means any element of a valve train which is interposed in the power flow between the camshaft and valve, in particular a conventional bucket tappet or a roller tappet.
  • a bucket tappet for an internal combustion engine of any type is used, in particular a mechanical, hydraulic and / or switchable bucket tappet.
  • the tappet has a shirt, which is used, for example, a hollow cylinder with a lateral surface corresponding to the lateral surface of a cylinder in a corresponding bore of an adjacent guide element such as a cylinder head.
  • an anti-rotation element is provided according to the invention, which, in particular radially inward, is permanently inserted into a radial recess of the shirt. The anti-rotation element determines the orientation of the shirt relative to an adjacent guide element about a lifting axis, which corresponds to the stroke axis of the valve.
  • the anti-rotation element completely prevent rotation of the bucket tappet or of the shirt about the lifting axis in that the anti-rotation element is received in the circumferential direction positively in a recess of the cylinder head.
  • a small clearance in the circumferential direction may be provided or the orientation of the shirt is predetermined by the anti-rotation element in an angular range.
  • the anti-rotation element can fulfill further functions.
  • the anti-rotation element has a circumferential wall in the circumferential direction.
  • the wall has on the one hand at least one end face, which is supported on the outer lateral surface of the shirt radially inwardly.
  • At least one extension is associated with the wall, which extends through the recess and has a shoulder which is supported radially outward on the inner lateral surface of the shirt.
  • the invention is based on the finding that it is not necessary that the anti-rotation element extends through the recess over its entire circumference about its longitudinal axis. Rather, portions of the aforementioned scope are arranged only outside of the shirt and support with their end faces the anti-rotation element radially inward, while extending only portions through the recess. As a result, the required material usage for the anti-rotation element can be reduced. About the paragraph a functional and reliable way of supporting the anti-rotation element is created radially outward.
  • the heel provides a positive connection in one direction between anti-rotation element and shirt, which can be overcome only under elastic and / or plastic deformation of the anti-rotation element.
  • the regions for support radially inward and radially outward are spatially separated from one another in the circumferential direction about the longitudinal axis of the anti-rotation element and can in particular be different depending on the requirements, for example corresponding to the forces acting in operation and corresponding to the necessary assembly forces. or disassembly forces.
  • at least a portion of the extensions and end faces at the same circumferential angle to the longitudinal axis of the anti-rotation element, but is arranged offset radially to this longitudinal axis.
  • the number of supporting points between anti-rotation element and shirt can be increased by providing two end faces, which are opposite one another on the circumference, which are radially supported on the outer lateral surface of the shirt.
  • two opposite extensions can be provided with paragraphs, which are each supported on the inner circumferential surface of the shirt radially outward. Due to the increased number of supporting and contact points, on the one hand, the acting forces between anti-rotation element and shirt can be increased and / or the stresses of said components can be reduced. On the other hand, as a result of the increase in the number of supporting points, a more exact predefinition of the position and position of the anti-rotation element relative to the shirt results.
  • the contact surfaces can be formed here selectively, with small or large areas.
  • two opposite end faces of the anti-rotation element are provided with two spherical contact areas, which are supported radially on the outer surface of the shirt.
  • two (or more) contact areas can be provided in the region of one end face each be so that at least three contact surfaces are present, which dictate the relative position of the anti-rotation element against the shirt in the room completely and without allowing a further degree of freedom.
  • a particularly simple to produce anti-rotation element of a tappet according to the invention can be made by producing the same from a sheet metal semi-finished product.
  • the sheet semifinished product can be completed immediately with the required outer contour or in a special processing operation as a sheet metal blank, in particular by a cutting process or a punching process, are produced.
  • a sheet metal semi-finished product By means of such a sheet metal semi-finished product, a constant or slightly varying wall thickness can be achieved in a simple manner.
  • a simple hollow body is designed by means of the sheet metal semi-finished, which may have high strength at low wall thickness and resulting low weight, which may result from a solidification during the forming process and / or by increasing the area moment of inertia due to the deformation.
  • the semi-finished sheet metal or sheet metal blank has a large-area center region and two opposing projections.
  • the large-area center region is in particular formed into a hollow body during a forming process and thus forms on the one hand a bottom and the wall and on the other hand an end face which alone or with the wall forms contact with the adjacent guide element, in particular with the cylinder head.
  • the anti-rotation element may be formed in one or more pieces.
  • the paragraphs are additionally applied to the wall of the anti-rotation element or the extensions or connected to them. It is also possible that the paragraphs are produced only with a successful assembly of anti-rotation element and shirt, for example by spreading the extensions inside the shirt.
  • a particularly advantageous embodiment is obtained when the anti-rotation element can be clipped into the recess of the shirt. Accordingly, the projections or the heels of the anti-rotation element are elastically deformed under elastic deformation with insertion of the anti-rotation element into the recess and jump for an reached mounting position again transversely to the longitudinal axis of the anti-rotation element outwards and thus give the position of the anti-rotation element in one direction.
  • a sheet metal blank is created, for example by punching.
  • the sheet metal blank is formed by a forming process in a one-sided open spatial hollow body.
  • the forming process can take place, for example, in a drawing and / or embossing, for example in one or more stages.
  • the paragraphs are provided on the extensions.
  • the paragraphs can also be made by forming the extensions and / or by applying additional material in the paragraphs.
  • Figure 1 shows a tappet 1 with a cup 2, which has a bottom 3, which cooperates with a control cam, and a shirt 4.
  • the shirt 4 is approximately hollow cylindrical in shape and in a suitable bore of the internal combustion engine, in particular the cylinder head, in the direction of Hub axis HH displaceably guided, wherein the lateral surface of the shirt 4 serves as a guide surface.
  • the shirt 4 has a radial recess 5.
  • an anti-rotation element 6 is inserted in the radial direction, which is supported in the circumferential direction about the lifting axis HH and in the stroke direction HH relative to the boundary of the recess 5.
  • the radially oriented longitudinal axis of the anti-rotation element is referred to here as axis LL.
  • the part of the anti-twist element 6 arranged radially inward of the shirt 4 engages positively in an inner body 7 of the bucket tappet 1, whereby it is fixed in the direction of the lifting axis HH as well as in the circumferential direction or limited in its displacement.
  • Radially outboard the anti-rotation element 6 is positively received in the circumferential direction about the lifting axis HH in a guide groove of the bore for the tappet 1, which extends in the direction of the lifting axis HH, so that via the anti-rotation element 6 a displacement of the tappet 1 in the direction of the lifting axis HH not is hindered, while a rotation of the bucket tappet 1 is excluded or limited to the lifting axis HH.
  • the paragraphs 25, 26 are produced by forming the extensions 9, 10 transversely to the axis L-L to the outside before or after insertion of the anti-rotation element 6 in the recess 5.
  • a sheet metal blank 8 with constant wall thickness can be used directly.
  • the paragraphs 25, 26 are formed from thickening, which require a different wall thickness of the sheet metal blank 8 in the corresponding portion. Alternatively, the thickening can be subsequently applied to the corresponding portions of the extensions 9, 10.
  • the wall 24 of the anti-rotation element 6 can be manufactured with the extensions 9, 10 in a first forming process. If small dimensional constraints arise as a result of this forming process for the projections 13, 14, 15, 16, they can be brought to the specified dimension in a subsequent embossing process and be correlated with one another.
  • Figure 3 shows a section in section III-III, from which the concerns of the anti-rotation element 6 in the region of the contact surfaces 29 in a peripheral region of the wall 24 and the Hindragragen the projections 9, 10 through the recess 5 of the shirt 4 can be seen.
  • FIGS. 4 to 6 show sections with a cross-sectional view taken transversely to the longitudinal axis L-L in parallel planes.
  • the height of the anti-rotation element 6, which is important for example for the interaction with a bore of the cylinder head and the guidance provided therein, can be ensured by the embossing and the dimension of a forming tool.
  • the development of the stamped sheet metal part may at least partially have a corrugated shape, so that there are lower embossing forces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
EP05024494A 2004-12-07 2005-11-10 Poussoir de soupape pour moteur à combustion interne et procédé de mise en oeuvre Expired - Fee Related EP1669555B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004058766A DE102004058766A1 (de) 2004-12-07 2004-12-07 Tassenstössel für eine Brennkraftmaschine und Verfahren zur Herstellung desselben

Publications (3)

Publication Number Publication Date
EP1669555A2 true EP1669555A2 (fr) 2006-06-14
EP1669555A3 EP1669555A3 (fr) 2009-05-06
EP1669555B1 EP1669555B1 (fr) 2012-09-05

Family

ID=35998546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05024494A Expired - Fee Related EP1669555B1 (fr) 2004-12-07 2005-11-10 Poussoir de soupape pour moteur à combustion interne et procédé de mise en oeuvre

Country Status (2)

Country Link
EP (1) EP1669555B1 (fr)
DE (1) DE102004058766A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130104818A1 (en) * 2010-07-07 2013-05-02 Schaeffler Technologies AG & Co. KG Tappet

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829423C2 (fr) 1978-07-05 1988-11-10 Irm-Antriebstechnik Gmbh, 7057 Winnenden, De
DE4115670A1 (de) 1991-05-14 1992-11-19 Bayerische Motoren Werke Ag Brennkraftmaschine mit gegen verdrehen gesicherten stoesseln
DE4337330A1 (de) 1993-11-02 1995-05-04 Iav Motor Gmbh Tassenstößel mit Rolle und Spielausgleichsvorrichtung für Ventiltriebe mit obenliegender Nockenwelle von Verbrennungsmotoren
DE19501061A1 (de) 1995-01-16 1996-07-18 Schaeffler Waelzlager Kg Verdrehgesicherter Stößel
DE4324756C2 (de) 1993-07-23 1997-06-12 Iav Motor Gmbh Verdrehsicherung für einen Ventilstößel
DE19600852A1 (de) 1996-01-12 1997-07-17 Schaeffler Waelzlager Kg Verdrehgesicherter Stößel
DE19957772A1 (de) 1999-12-01 2001-06-07 Bayerische Motoren Werke Ag Drehgesicherter Ventilstößel für Ventiltriebe von Brennkraftmaschinen, insbesondere Tassenstößel
DE10123966A1 (de) 2001-05-17 2002-11-21 Ina Schaeffler Kg Tassenstößel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3622245A1 (de) * 1986-07-02 1988-01-14 Ford Werke Ag Rollenstoesselanordnung mit verdrehsicherung, insbesondere fuer brennkraftmaschinen
DE4325610A1 (de) * 1993-07-30 1995-02-02 Schaeffler Waelzlager Kg Tassenförmiger Ventilstößel
DE10110914A1 (de) * 2001-03-07 2002-09-12 Ina Schaeffler Kg Ventiltrieb einer Brennkraftmaschine mit einem schaltbaren rotationssymmetrischen Bauteil
JP3985032B2 (ja) * 2001-12-13 2007-10-03 株式会社オティックス 可変動弁機構
DE10332981A1 (de) * 2003-07-21 2005-02-10 Bayerische Motoren Werke Ag Ventilströßeleinrichtung, insbesondere drehgesicherter Tassenstößel mit gekrümmter Nockenfolgefläche

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829423C2 (fr) 1978-07-05 1988-11-10 Irm-Antriebstechnik Gmbh, 7057 Winnenden, De
DE4115670A1 (de) 1991-05-14 1992-11-19 Bayerische Motoren Werke Ag Brennkraftmaschine mit gegen verdrehen gesicherten stoesseln
DE4324756C2 (de) 1993-07-23 1997-06-12 Iav Motor Gmbh Verdrehsicherung für einen Ventilstößel
DE4337330A1 (de) 1993-11-02 1995-05-04 Iav Motor Gmbh Tassenstößel mit Rolle und Spielausgleichsvorrichtung für Ventiltriebe mit obenliegender Nockenwelle von Verbrennungsmotoren
DE19501061A1 (de) 1995-01-16 1996-07-18 Schaeffler Waelzlager Kg Verdrehgesicherter Stößel
DE19600852A1 (de) 1996-01-12 1997-07-17 Schaeffler Waelzlager Kg Verdrehgesicherter Stößel
DE19957772A1 (de) 1999-12-01 2001-06-07 Bayerische Motoren Werke Ag Drehgesicherter Ventilstößel für Ventiltriebe von Brennkraftmaschinen, insbesondere Tassenstößel
DE10123966A1 (de) 2001-05-17 2002-11-21 Ina Schaeffler Kg Tassenstößel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130104818A1 (en) * 2010-07-07 2013-05-02 Schaeffler Technologies AG & Co. KG Tappet
US8863716B2 (en) * 2010-07-07 2014-10-21 Schaeffler Technologies Gmbh & Co. Kg Tappet

Also Published As

Publication number Publication date
EP1669555A3 (fr) 2009-05-06
EP1669555B1 (fr) 2012-09-05
DE102004058766A1 (de) 2006-06-08

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