WO2013000589A1 - Montage d'un arbre à cames au moyen de paliers à roulement - Google Patents

Montage d'un arbre à cames au moyen de paliers à roulement Download PDF

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Publication number
WO2013000589A1
WO2013000589A1 PCT/EP2012/053098 EP2012053098W WO2013000589A1 WO 2013000589 A1 WO2013000589 A1 WO 2013000589A1 EP 2012053098 W EP2012053098 W EP 2012053098W WO 2013000589 A1 WO2013000589 A1 WO 2013000589A1
Authority
WO
WIPO (PCT)
Prior art keywords
combustion engine
internal combustion
sliding cam
cams
cam units
Prior art date
Application number
PCT/EP2012/053098
Other languages
German (de)
English (en)
Inventor
Lutz Kirbach
Stefan Kieninger
Original Assignee
Schaeffler Technologies AG & 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 & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2013000589A1 publication Critical patent/WO2013000589A1/fr

Links

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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/18—Camshafts

Definitions

  • Reciprocating internal combustion engine with a crank mechanism with at least one cylinder head whose inlet and outlet channels are dominated by at least one designed as inlet or outlet valve gas exchange valve, which can be actuated by cams at least one camshaft and driven by these transmission elements, wherein the cams from sliding cam are formed with at least two cams per sliding cam unit, which are rotatably but axially displaceably arranged by means of internal teeth on a basic shaft with external teeth, with at least one internal combustion engine fixed device for moving the sliding cam units in different axial positions by means of a Aktorstatt cooperating sliding grooves on the circumference of the sliding cam units and with bearings for radial and axial fixing of the camshaft to a component of the internal combustion engine.
  • a camshaft for installation in such a reciprocating internal combustion engine is known from DE-101 48 243 A1.
  • the sliding cam units have bearings on their outer circumference, which are guided in bearings supported on the internal combustion engine.
  • the width of the bearing corresponds to the width of the sliding bearing plus the displacement of the sliding cam assembly in the axial direction. Therefore, the sliding bearing requires a large overall extent in the axial direction of the camshaft, whereby a large space is needed, which is perceived as unfavorable.
  • the basic shaft of the camshaft is therefore only indi- Directly guided radially over the internal and external teeth of the sliding cam units and the basic shaft.
  • the object of the invention is therefore to improve the bearing of the camshaft of a reciprocating internal combustion engine so that the disadvantages described are eliminated, with an exact bearing of the camshaft should take place. It should also be a cost-effective production can be provided by simple means.
  • the object of the invention is achieved in that the fundamental wave is guided by means of bearings, which are arranged between the sliding cam units, on the component of the internal combustion engine. This is an exact storage of
  • the fundamental wave between the sliding cam units has direct running paths, which serve as bearing inner surfaces.
  • the fundamental wave has no external teeth, so that there bearing surfaces, for example by grinding the fundamental wave to direct running tracks, for plain bearings, but are preferably provided for rolling bearings.
  • the roller bearings are designed as roller or needle bearings and the cages are designed expandable, so that the cages can be used with the rollers or needles on the outer teeth of the fundamental shaft.
  • the cages are preferably made of plastic and can therefore be expanded.
  • the cages have at least one separating slot aligned with the axis of the basic shaft, so that the cage can be resiliently bent up and, if necessary, compressed again.
  • the separating slot can also be connected by a diagonal bar, which does not separate the cage, but still allows an expansion. It can therefore be pushed directly over the direct career path.
  • two or more dividing slots may also be provided, the cages preferably being fastened together at their ends, e.g. through entanglements.
  • bearing outer rings are provided, the inner diameter of which are equal to or greater than the outer diameter of the external teeth, so that the bearing outer rings can be pushed by sliding over the outer teeth of the fundamental shaft to the respective cages or rollers or needles.
  • the bearing outer rings are designed with at most one inboard board so that they can be pushed onto the rollers or needles.
  • the bearing outer rings are arranged and braced in bearing blocks.
  • the fundamental wave has an axial bearing in the region of one of its ends in order to provide axial support to the sliding forces of the sliding cam units.
  • FIG. 2 shows a section through a bearing according to the line AA in Figure 1
  • Figure 3 an enlarged section according to the circle Z in Figure 2
  • FIG. 4 a camshaft without bearing blocks with a partial section through a bearing
  • Figure 5 an enlarged view of the bearing according to circle Y in Figure 4 with
  • Figure 6 a partial perspective view of a camshaft in the installed state with a bearing block.
  • FIGS. 1 to 6 as shown in detail, 1 generally designates a camshaft having a basic shaft 2 and sliding cam units 3.
  • the basic shaft 2 has external teeth 4 in the region of the sliding cam units 3, wherein 3 paragraphs are provided between the external teeth 4 and the sliding cam units, with a diameter equal to less than the base circle of the external teeth 4.
  • These paragraphs are prepared as direct running tracks 5 and ground accordingly, so that these direct running tracks serve as bearing inner surfaces for rolling bearings.
  • the respective cage 6 can be widened with inserted rollers or needles, pushed over the external toothing 4 or directly over the bearing inner surface and placed at the appropriate location.
  • bearing outer rings 8 are arranged, which have an inner diameter equal to or greater than the outer diameter of the outer toothing 4, so that the outer bearing rings 8 can be pushed over the outer toothing 4 and placed around the rollers or needles of the cages 6.
  • the rollers or needles have a thickness such that the outer dimension matches the inner diameter of the bearing outer rings 8.
  • the end faces of the cages 6 facing external teeth 4 can serve as a guide for the cages 6 after appropriate processing.
  • the bearing outer rings 8 are fixed in bearing blocks 9, which are attached to a suitable component of the internal combustion engine, in particular the cylinder head, or fastened thereto, eg screwed.

Abstract

L'invention concerne un moteur à combustion interne à pistons à mouvement alternatif comportant un mécanisme d'embiellage; au moins une culasse de cylindre dont les canaux d'admission et d'échappement sont asservis par au moins respectivement une soupape d'échange des gaz, réalisée sous la forme d'une soupape d'admission ou d'une soupape d'échappement, lesdites soupapes pouvant être actionnées par des cames d'au moins un arbre à cames (1) et par des éléments de transmission entraînés par celles-ci, les cames étant réalisées sous la forme de cames coulissantes avec au moins deux cames par unité de cames coulissantes (3) qui sont disposées solidaires en rotation mais mobiles axialement au moyen d'une denture intérieure sur un arbre de base (2) à denture extérieure (4); au moins un dispositif, fixe par rapport au moteur à combustion interne, pour le déplacement des unités de cames coulissantes (3) dans différentes positions axiales au moyen de gorges de translation coopérant avec une broche d'actionnement et situées sur la périphérie des unités de cames coulissantes (3); et des paliers pour le montage radial et axial de l'arbre à cames (1) sur un composant du moteur à combustion interne, l'arbre de base (2) étant guidé sur le composant du moteur à combustion interne au moyen de paliers qui sont disposés entre les unités de cames coulissantes (3).
PCT/EP2012/053098 2011-06-30 2012-02-23 Montage d'un arbre à cames au moyen de paliers à roulement WO2013000589A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011078434.9 2011-06-30
DE102011078434A DE102011078434A1 (de) 2011-06-30 2011-06-30 Lagerung einer Nockenwelle mittels Wälzlagern

Publications (1)

Publication Number Publication Date
WO2013000589A1 true WO2013000589A1 (fr) 2013-01-03

Family

ID=45755361

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/053098 WO2013000589A1 (fr) 2011-06-30 2012-02-23 Montage d'un arbre à cames au moyen de paliers à roulement

Country Status (2)

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DE (1) DE102011078434A1 (fr)
WO (1) WO2013000589A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104141516B (zh) * 2013-11-22 2016-04-13 泰州市宏祥动力机械有限公司 凸轮轴结构

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19844203A1 (de) * 1998-09-26 2000-03-30 Schaeffler Waelzlager Ohg Lagerung einer Welle einer Brennkraftmaschine mit geteilten Wälzlagern
DE10148243A1 (de) 2001-09-28 2003-04-10 Ina Schaeffler Kg Ventiltrieb mit Ventilhubumschaltung für die Gaswechselventile eines 4-Takt-Verbrennungsmotors
DE102004022832A1 (de) * 2004-05-08 2005-12-01 Dr.Ing.H.C. F. Porsche Ag Ventiltrieb für eine Brennkraftmaschine
EP1609961A1 (fr) * 2004-06-18 2005-12-28 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Elément d'actionnement de soupape pour deux soupapes avec des éléments hydrauliques de compensation de jeu
EP2060807A1 (fr) * 2006-09-04 2009-05-20 Ntn Corporation Roulement à rouleaux, structure de support d'arbre à cames, et moteur à combustion interne
EP2060753A1 (fr) * 2006-09-04 2009-05-20 Ntn Corporation Roulement à rouleaux, structure de support d'arbre à cames, et moteur à combustion interne
WO2010012371A1 (fr) * 2008-07-31 2010-02-04 Audi Ag Liaison par cannelures et mécanisme de distribution avec liaison par cannelures entre un arbre à cames et des supports de came déplaçables
DE102009049464A1 (de) * 2009-10-15 2011-04-21 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Zylinderkopfdeckel einer Brennkraftmaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19844203A1 (de) * 1998-09-26 2000-03-30 Schaeffler Waelzlager Ohg Lagerung einer Welle einer Brennkraftmaschine mit geteilten Wälzlagern
DE10148243A1 (de) 2001-09-28 2003-04-10 Ina Schaeffler Kg Ventiltrieb mit Ventilhubumschaltung für die Gaswechselventile eines 4-Takt-Verbrennungsmotors
DE102004022832A1 (de) * 2004-05-08 2005-12-01 Dr.Ing.H.C. F. Porsche Ag Ventiltrieb für eine Brennkraftmaschine
EP1609961A1 (fr) * 2004-06-18 2005-12-28 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Elément d'actionnement de soupape pour deux soupapes avec des éléments hydrauliques de compensation de jeu
EP2060807A1 (fr) * 2006-09-04 2009-05-20 Ntn Corporation Roulement à rouleaux, structure de support d'arbre à cames, et moteur à combustion interne
EP2060753A1 (fr) * 2006-09-04 2009-05-20 Ntn Corporation Roulement à rouleaux, structure de support d'arbre à cames, et moteur à combustion interne
WO2010012371A1 (fr) * 2008-07-31 2010-02-04 Audi Ag Liaison par cannelures et mécanisme de distribution avec liaison par cannelures entre un arbre à cames et des supports de came déplaçables
DE102009049464A1 (de) * 2009-10-15 2011-04-21 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Zylinderkopfdeckel einer Brennkraftmaschine

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