EP1659268A1 - Poussoir pour moteur à combustion interne - Google Patents

Poussoir pour moteur à combustion interne Download PDF

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Publication number
EP1659268A1
EP1659268A1 EP05024168A EP05024168A EP1659268A1 EP 1659268 A1 EP1659268 A1 EP 1659268A1 EP 05024168 A EP05024168 A EP 05024168A EP 05024168 A EP05024168 A EP 05024168A EP 1659268 A1 EP1659268 A1 EP 1659268A1
Authority
EP
European Patent Office
Prior art keywords
rotation element
shirt
head
recess
cup tappet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05024168A
Other languages
German (de)
English (en)
Other versions
EP1659268B1 (fr
Inventor
Georg Backert
Michael Dotterweich
Matthias Reichel
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.)
IHO Holding GmbH 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 EP1659268A1 publication Critical patent/EP1659268A1/fr
Application granted granted Critical
Publication of EP1659268B1 publication Critical patent/EP1659268B1/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
    • F01L1/20—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
    • F01L1/25—Hydraulic tappets between cam and valve stem
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • the invention relates to a tappet for an internal combustion engine according to the preamble of claim 1.
  • a bucket tappets for an internal combustion engine which is interposed between a control cam and a valve.
  • the tappet has a shirt, which is approximately hollow cylindrical and is guided in a bore of the cylinder head.
  • the shirt has a radial recess into which an anti-rotation element is inserted, which avoids a rotation of the bucket tappet about the lifting axis relative to the cylinder head in that the anti-rotation element engages in the circumferential direction both positively in the tappet and in a suitable groove of the cylinder head.
  • the anti-rotation element protrudes radially out of the shirt.
  • the anti-rotation element is designed as a cylinder body whose longitudinal axis is oriented in the stroke direction and the end faces radially have from the outside opening grooves, in which engages a projection of the shirt.
  • the outside of the shirt lying lateral surface of the anti-rotation element engages in the groove of the cylinder head, while the inner circumferential surface rests against an inner body of the bucket tappet.
  • the anti-rotation element is designed as an elastic spring element in the form of a U-shaped clasp with two legs and a back.
  • the anti-rotation element is designed as a hollow cylindrical, slotted sleeve whose longitudinal axis is oriented in the stroke direction.
  • the sleeve has opposite impressions, in which engage under elastic deformation of the sleeve, the boundaries of the recess of the shirt in the circumferential direction.
  • DE 43 24 756 C2 discloses a bucket tappet, which has an outer cup with an inner tappet, with a hydraulic compensating element slidably guided in the outer cup.
  • An anti-rotation engages thrust movable in a guide groove on the receiving bore in the cylinder head and in an opening of the outer cup.
  • the anti-rotation element additionally engages in a guide groove of the inner plunger with a relatively large inner guide length or contact surface.
  • This enlarged inner guide length serves for a secure guidance between the inner tappet and the cup and prevents tilting of the outer guide length in the guide groove of the cylinder head. As a result, the occurrence of chatter marks is avoided in the guide, which can lead to jamming.
  • a bucket tappet in which a shirt abuts an inner part.
  • the anti-rotation element does not protrude beyond the inner jacket of the shirt.
  • the inner end face of the anti-rotation element is formed corresponding to a sub-segment of a lateral surface of a cylinder, so that the inner part over a large area on the aforementioned end face and an inner circumferential surface of the shirt can rest.
  • an anti-rotation element which is cylindrical with a longitudinal axis in the direction of the stroke direction.
  • the outside of the cup tappet arranged lateral surface is guided in a guide groove with a circular segment-shaped contour corresponding to the outer contour of the cylinder.
  • the invention has for its object to provide a non-rotating cup tappet, the simple production possibility of the cup, in particular the recess of the shirt, and / or the anti-rotation element ensures easy installation and a good function and reliability.
  • the anti-rotation element has a special outer contour such that it has a head and a shank in the longitudinal section of the anti-rotation element.
  • This outer contour may have the anti-rotation element, for example in the installed state in a section through the longitudinal axis of the anti-rotation element and the axis of the stroke direction and / or by the longitudinal axis and an oriented in the circumferential direction of the tappet axis.
  • the head and the shaft in particular a mushroom-shaped outer contour is given.
  • the anti-rotation element further has a thickening in the region of the shaft.
  • the anti-rotation element can be clipped into the recess of the shirt with elastic deformation of the thickening. It is clear that also corresponding longitudinal sides of the recess experience an elastic deformation.
  • the dimension transverse to the longitudinal axis in said section of the head is greater than the at least one partial region of the shaft. This ensures that the head is supported with a relatively large distance from the longitudinal axis relative to the outer surface of the shirt.
  • the lever arm of the support can be increased.
  • the length of a support line or the size of a support surface is increased according to the invention. As a result, there is an improved securing of the anti-rotation element with respect to a tilting relative to the shirt, whereby an improved positional assurance takes place.
  • Another advantage of the design according to the invention is that the tolerances due to the elastic deformation of the anti-rotation element both for anti-rotation and for the wall thickness of the tappet and the contour of the recess can be made larger, as tolerated any deviations from an ideal by an elastic deformation can be.
  • For an oblique education at least an abutment surface there is an even further improvement in the tolerance of such deviations, since not an exact position is given on the slopes, but a slight displacement of a contact surface (at the expense of a modified press-in force) is possible. This can u. U. unnecessary a grouping of cup and anti-rotation element.
  • the shank has two partial regions, namely a first partial region which forms the thickening, and a second partial region, which is arranged between the first partial region and the head.
  • the outer dimension of the second portion is smaller than that of the thickening.
  • the anti-rotation element is clipped in the radial direction with sense of direction into the interior of the bucket tappet in the recess, in which case the outer dimension of the first portion, ie the thickening, is elastically reduced. This elastic reduction is oriented in particular in the circumferential direction.
  • the anti-rotation element opposite the shirt is secured radially inwardly with a bearing surface formed by the head, with which the head rests against the outer surface of the shirt.
  • a contact surface is provided which secures the anti-rotation element radially outward. This contact surface is formed by the transition region from the first partial region to the second partial region.
  • this transition region can be formed as a jump, so that a contact surface formed transversely to the longitudinal axis of the anti-rotation element is formed.
  • the transition region is formed as a slope.
  • the force upon application of the anti-rotation element radially outward, the force is divided into a force oriented in the longitudinal direction of the anti-rotation element and a transverse force oriented transversely to the longitudinal axis of the anti-rotation element.
  • This transverse force acts on an elastic reduction of the outer dimension of the first portion or the thickening, so that under certain circumstances for disassembly with sufficient application of a force radially outward the clipped connection can be solved again and the tappet can be removed from the recess.
  • the slope or a corresponding curved course the force required for disassembly force can be dimensioned so that there is an optimum for reliability and allow disassembly.
  • the tappet according to the invention is equipped with an anti-rotation element, which is made of a solid material.
  • an anti-rotation element which is made of a solid material.
  • a solid material there are particularly good possibilities for a production, which can be made less expensive under certain circumstances.
  • a solid material particularly defined stiffness properties, in particular in the region of thickening, result and / or results in a particularly good fatigue strength of the anti-rotation element.
  • the anti-rotation element is made of plastic, for example of a thermoplastic or a thermoset, or any metal having the desired mechanical properties.
  • plastic for example of a thermoplastic or a thermoset, or any metal having the desired mechanical properties.
  • the abovementioned materials can be used, for example, via casting, forming, injection molding or machining. For example, a forming production from a metal sheet is possible.
  • the anti-rotation element is made of a continuous casting profile.
  • the contour according to the invention in the aforementioned longitudinal section corresponds to the outer contour of the continuous casting profile, from which then the individual anti-rotation elements be separated or punched out.
  • the material used is, for example, a metal 100 CR 6.
  • the distance of the abovementioned contact surfaces preferably correlates with the wall thickness of the shirt in the region of the recess.
  • the wall thickness and the distance of the contact surfaces form a transition fit, a press fit or a clearance.
  • the anti-rotation element is designed to be multifunctional.
  • the anti-rotation element can serve in addition to the rotation of an oil supply from the outside into the interior of the tappet.
  • an end region remote from the head of the anti-rotation element for example with an end face or a side face, to serve a (twisting) securing for an inner body of the tappet.
  • the recess of the shirt is approximately rectangular in cross-section and has longitudinal and transverse sides, which are connected to each other via rounded corner regions.
  • the longitudinal and transverse sides each have, for example, approximately centrally, projections.
  • the projections form contact areas which receive the anti-rotation element in the stroke direction with a transition fit.
  • Projections in the region of the longitudinal sides form contact areas, which come into operative connection with the thickening of the anti-rotation element and between which in the mounted position, the second portion is added.
  • a production of such a recess with a sufficient manufacturing accuracy is particularly well possible, since for the remote areas of the projections of the recess (rounded corner areas) a relatively large tolerance can be selected, since they do not come into functional operative connection with the anti-rotation element.
  • For the longitudinal sides and transverse sides associated projections same or different manufacturing accuracies are selected according to the requirements mentioned. In this case, it is possible, for example, for the protrusions to be initially produced with a certain degree of oversize and to be brought to a desired level in a subsequent operation.
  • the anti-rotation element has an insertion phase
  • this can be particularly easily introduced radially inwardly into the recess during assembly, wherein the insertion form guide surfaces in an inaccurate insertion.
  • a further improved contact surface between the anti-rotation element and the shirt of the bucket tappet results when the head associated with the bearing surface is curved according to the lateral surface of the shirt. In this way, punctiform or linear contact areas can be avoided, since the head rests on a large area on the lateral surface of the shirt. This results in improved support conditions.
  • the contour of the anti-rotation element 6 can be seen in an enlarged partial longitudinal section according to FIG.
  • the head forms with an end face a contact surface 23, whose inclination corresponds approximately to the inclination of the associated region of the lateral surface of the shirt 4.
  • the contact surface 23 in the longitudinal section shown in Figure 4 is circular-segment-shaped, wherein the radius of the contact surface 23 corresponds to the distance of the lateral surface of the shirt 4 and the head 20 in the installed state of the lifting axis HH and the center of the circular segment-shaped contour of the contact surface 23rd is in the installed state on the lifting axis HH.
  • the shaft 21 has a portion 24, which is assigned to the head 20 remote from the end face 25 of the shaft 21.
  • the portion 24 has a chamfer 26, which serves to simplify the insertion of the anti-rotation element 6 in the recess 5.
  • a transition region 27 At the portion 24 includes in the direction of the head, a transition region 27. In the transition region 27, the distance of the contour shown from the longitudinal axis LL is continuously increased, for example, with an oblique or curved course.
  • the transition region 27 is adjoined by a first partial region 28 with a straight outer contour at a constant distance from the longitudinal axis LL.
  • the first portion 28 includes a transition region 29, in which the distance from the longitudinal axis LL rectilinear or curved decreases up to a second portion 30 with a straight contour and a constant distance from the axis LL.
  • the second portion 30 has the undercut 22 in the end region for the transition to the head 20.
  • the anti-rotation element 6 has approximately a constant contour at a substantially constant distance from the longitudinal axis L-L. Perpendicular to the plane of the drawing, the extension is such that the anti-rotation element 6 is received with suitable end faces with a clearance fit, transition fit or an interference fit between the abutment surfaces of the shirt 4 formed by the projections 16, 18.
  • the partial region 24 with the chamfer 26 With insertion of the anti-rotation element 6 into the recess 5, the partial region 24 with the chamfer 26 initially comes into operative connection with the projections 17, 19, whereby a centering effect is achieved and a further insertion of the partial region 24 in the radial direction inward is made possible.
  • the contact force between the boundary of the recess 5 and the transition region 27 is increased according to the distance of the contact area of the longitudinal axis LL in the region of the transition region 26, which with an elastic deformation of the shirt 4 or the anti-rotation element 6 radially goes along inside.
  • the anti-rotation element 6 can be moved radially inwards, overcoming the frictional force between the first portion 28 and the boundary of the recess 5.
  • the transition region 29 supports the movement radially inwardly. A movement takes place until the head 20 comes with the contact surface 23 for engagement with the outer surface of the shirt 4.
  • the distance of the projections 17, 19 in the circumferential direction is 3.07 mm
  • the portion 24 in the circumferential direction has an extension of 3 mm
  • the first portion 28 has an extension of 3.17 mm
  • the second portion 30 an extension of 3.07 mm.
  • the material used is in particular a continuous casting profile in which the longitudinal surfaces form the contour according to FIG. 4 and which is separated into individual pieces in the direction of the lifting axis HH.
  • the material is, in particular, 100 CR 6.
  • a thickening 32 is formed in the region of the first subregion 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
EP05024168A 2004-11-23 2005-11-05 Poussoir pour moteur à combustion interne Expired - Fee Related EP1659268B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004056457A DE102004056457A1 (de) 2004-11-23 2004-11-23 Tassenstößel für eine Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP1659268A1 true EP1659268A1 (fr) 2006-05-24
EP1659268B1 EP1659268B1 (fr) 2009-01-14

Family

ID=35703320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05024168A Expired - Fee Related EP1659268B1 (fr) 2004-11-23 2005-11-05 Poussoir pour moteur à combustion interne

Country Status (3)

Country Link
US (1) US7159552B2 (fr)
EP (1) EP1659268B1 (fr)
DE (2) DE102004056457A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010028204A1 (fr) * 2008-09-04 2010-03-11 The Timken Company Dispositif d'alignement à utiliser avec un poussoir
WO2010048968A1 (fr) * 2008-10-27 2010-05-06 Ab Skf Dispositif anti-rotation

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004036106A1 (de) * 2004-07-24 2006-03-16 Ina-Schaeffler Kg Periodisch beaufschlagbarer Stößel für einen Ventil- oder Pumpentrieb
DE102006059716A1 (de) * 2006-12-18 2008-06-26 Mahle International Gmbh Verdrehgesicherter Stößel eines Ventiltriebes
WO2012082768A1 (fr) 2010-12-13 2012-06-21 Eaton Corporation Dispositif anti-rotation d'actionneur de pompe
USD701243S1 (en) 2011-12-13 2014-03-18 Eaton Corporation Pump actuator anti-rotation device
US20180156078A1 (en) * 2014-01-12 2018-06-07 Eaton Corporation Engine valve lifter oil flow control and anti-rotation feature
JP6892868B2 (ja) * 2016-02-19 2021-06-23 イートン インテリジェント パワー リミテッドＥａｔｏｎ Ｉｎｔｅｌｌｉｇｅｎｔ Ｐｏｗｅｒ Ｌｉｍｉｔｅｄ 回転防止プラグを有するエンジンバルブリフタ
US10690016B2 (en) 2016-02-19 2020-06-23 Eaton Intelligent Power Limited Engine valve lifter having anti-rotation plug
US10119607B2 (en) 2016-04-15 2018-11-06 Koyo Bearings North America Llc Follower mechanism
US11143059B2 (en) 2019-10-03 2021-10-12 Koyo Bearings North America Llc Tappet assembly with unground outer cup
US11149593B2 (en) 2019-10-03 2021-10-19 Koyo Bearings North America Llc Tappet assembly with formed anti-rotation alignment device

Citations (11)

* 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
DE4324756A1 (de) * 1993-07-23 1995-02-16 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
DE19950989A1 (de) * 1999-10-22 2000-06-21 Schaeffler Waelzlager Ohg Schaltbarer Nockenfolger
DE19957772A1 (de) 1999-12-01 2001-06-07 Bayerische Motoren Werke Ag Drehgesicherter Ventilstößel für Ventiltriebe von Brennkraftmaschinen, insbesondere Tassenstößel
DE10110914A1 (de) * 2001-03-07 2002-09-12 Ina Schaeffler Kg Ventiltrieb einer Brennkraftmaschine mit einem schaltbaren rotationssymmetrischen Bauteil
DE10123966A1 (de) 2001-05-17 2002-11-21 Ina Schaeffler Kg Tassenstößel
EP1619358A1 (fr) * 2004-07-24 2006-01-25 INA-Schaeffler KG Poussoir à actionnement cyclique pour un système de commande de soupape ou de pompe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3814700A1 (de) * 1988-04-30 1989-11-09 Schaeffler Waelzlager Kg Hydraulisches spielausgleichselement
US5431133A (en) * 1994-05-31 1995-07-11 General Motors Corporation Low mass two-step valve lifter
DE19515284A1 (de) * 1995-04-26 1996-10-31 Schaeffler Waelzlager Kg Nockenfolger eines Ventiltriebs einer Brennkraftmaschine
DE10123963A1 (de) * 2001-05-17 2002-11-21 Ina Schaeffler Kg Stößel für einen Ventiltrieb
DE10332981A1 (de) * 2003-07-21 2005-02-10 Bayerische Motoren Werke Ag Ventilströßeleinrichtung, insbesondere drehgesicherter Tassenstößel mit gekrümmter Nockenfolgefläche

Patent Citations (12)

* 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
DE4324756A1 (de) * 1993-07-23 1995-02-16 Iav Motor Gmbh Verdrehsicherung für einen Ventilstößel
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
DE19950989A1 (de) * 1999-10-22 2000-06-21 Schaeffler Waelzlager Ohg Schaltbarer Nockenfolger
DE19957772A1 (de) 1999-12-01 2001-06-07 Bayerische Motoren Werke Ag Drehgesicherter Ventilstößel für Ventiltriebe von Brennkraftmaschinen, insbesondere Tassenstößel
DE10110914A1 (de) * 2001-03-07 2002-09-12 Ina Schaeffler Kg Ventiltrieb einer Brennkraftmaschine mit einem schaltbaren rotationssymmetrischen Bauteil
DE10123966A1 (de) 2001-05-17 2002-11-21 Ina Schaeffler Kg Tassenstößel
EP1619358A1 (fr) * 2004-07-24 2006-01-25 INA-Schaeffler KG Poussoir à actionnement cyclique pour un système de commande de soupape ou de pompe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010028204A1 (fr) * 2008-09-04 2010-03-11 The Timken Company Dispositif d'alignement à utiliser avec un poussoir
US8616168B2 (en) 2008-09-04 2013-12-31 Koyo Bearings Usa Llc Alignment device for use with a tappet
WO2010048968A1 (fr) * 2008-10-27 2010-05-06 Ab Skf Dispositif anti-rotation

Also Published As

Publication number Publication date
DE102004056457A1 (de) 2006-06-08
US7159552B2 (en) 2007-01-09
EP1659268B1 (fr) 2009-01-14
DE502005006459D1 (de) 2009-03-05
US20060107917A1 (en) 2006-05-25

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