EP3129615B1 - Module équipé d'un arbre à cames pré-orienté - Google Patents

Module équipé d'un arbre à cames pré-orienté Download PDF

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Publication number
EP3129615B1
EP3129615B1 EP15713876.9A EP15713876A EP3129615B1 EP 3129615 B1 EP3129615 B1 EP 3129615B1 EP 15713876 A EP15713876 A EP 15713876A EP 3129615 B1 EP3129615 B1 EP 3129615B1
Authority
EP
European Patent Office
Prior art keywords
camshaft
securing part
receiving element
pin
module
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.)
Active
Application number
EP15713876.9A
Other languages
German (de)
English (en)
Other versions
EP3129615A1 (fr
Inventor
Heiko Schmid
Ulrich Schatton
Hans-Jürgen 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.)
Thyssenkrupp Dynamic Components Teccenter AG
Original Assignee
ThyssenKrupp Presta TecCenter AG
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 ThyssenKrupp Presta TecCenter AG filed Critical ThyssenKrupp Presta TecCenter AG
Publication of EP3129615A1 publication Critical patent/EP3129615A1/fr
Application granted granted Critical
Publication of EP3129615B1 publication Critical patent/EP3129615B1/fr
Active 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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0043—Arrangements of mechanical drive elements
    • 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
    • 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
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • 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
    • F01L2001/028—Pre-assembled timing arrangement, e.g. located in a cassette
    • 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
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • F01L2250/00—Camshaft drives characterised by their transmission means
    • F01L2250/04—Camshaft drives characterised by their transmission means the camshaft being driven by belts
    • 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
    • F01L2250/00—Camshaft drives characterised by their transmission means
    • F01L2250/06—Camshaft drives characterised by their transmission means the camshaft being driven by gear wheels
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • 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
    • F01L2303/02—Initial camshaft settings

Definitions

  • the invention relates to a module having a receiving element, in particular in the form of a bearing frame or a cover, for arrangement on a cylinder head of an internal combustion engine.
  • the module also has at least one camshaft rotatably mounted in the receiving element, which protrudes from an end face of the receiving element to hold a camshaft gear.
  • the module is pre-assembled for direct assembly on the cylinder head.
  • camshaft modules were designed in which one or two camshafts are preassembled in a bearing frame as part of the cylinder head or in a cover as a complete cylinder head. Such prefabricated camshaft modules only need to be placed on the cylinder block during the assembly of the internal combustion engine. The only remaining production step is the assembly of traction means, in particular the toothed belt or the timing chain, on the camshaft sprocket.
  • a module comprising a receiving element with at least one camshaft rotatably mounted in the receiving element, which protrudes from an end face of the receiving element to hold a camshaft gear, has become known.
  • the object of the present invention is therefore to create a simply constructed and inexpensive module comprising the receiving element and one or more camshafts, which can be assembled in a few steps as part of the assembly of internal combustion engines, which fixes the camshaft (s) in a predetermined angular position reliable until a traction device is installed on the camshaft gear guaranteed and that allows easy removal of the fixation after assembly.
  • an essential aspect of the invention is first of all to ensure a particularly simple and quick assembly for the prefabricated module consisting of the receiving element and the camshaft (s) with the securing part engaging in the camshaft gear.
  • the special feature here is that the securing part engages in the externally accessible camshaft gear while protecting its ring gear and, despite its simple mechanical design, fixes it particularly reliably with respect to the receiving element. The angular position of the camshafts specified for the installation of the module is thus reliably fixed.
  • the module is preassembled for direct assembly on the cylinder head of an internal combustion engine in that the cams of the camshaft are initially in the angular position for actuation of the valves, which is predetermined by the correct control ratio.
  • the camshaft In this angular position, the camshaft is locked against rotation by the securing part which is accessible from the outside for handling, the securing part reaching through a recess in the camshaft gear and being positively locked against rotation with a receptacle of the receiving element provided for this purpose, whereby the camshaft gear is blocked with respect to the receiving element .
  • the securing part is removed from the locking position with a simple movement.
  • any prefabricated module comprising a receiving element and pre-assembled camshafts can be equipped.
  • a particularly suitable area of application are those modules in which the camshafts have been inserted into correspondingly coaxially arranged through bores in the receiving element using thermal shrinkage and expansion processes.
  • the body of the camshaft is initially cooled and thus shrunk to such an extent that it can be pushed into the through bores with the help of bearings.
  • the cams are "threaded on”. With the warming up and the corresponding expansion, the body of the camshaft is pressed at the intended locations in bearings and in the cams.
  • the main advantage of such a prefabricated and pre-positioned module is that it can be installed directly in the engine assembly and that a complex manufacturing step is saved due to the reliable fixing of the camshafts.
  • the use of the securing part according to the invention ensures that the camshafts are fixed in the receiving element in a particularly gentle manner, since they do not act on the toothed ring, but are nevertheless robust and precise.
  • the securing part according to the invention is particularly easy to handle during installation and removal.
  • the camshaft wheel which is a toothed wheel or belt wheel
  • a securing part that is particularly easy to handle.
  • the disk surface of the wheel is pierced by a first recess at least at one point to match a penetrating element of the securing part, whereby it is structurally particularly simple and provided according to the invention if this first recess is designed as a cylindrical bore that is formed by a complementary cylindrical Pin of the securing part is penetrated.
  • the pin then extends into a further receptacle provided in the receiving element in the form of a bore which, when the angular position is correct, is aligned with the bore in the camshaft gear. Attention must be paid to a corresponding fit that allows the pin to slide despite the greatest possible radial form fit.
  • the securing part being equipped with a corresponding holding means which interacts with the second recess.
  • the holding means thus fixes the securing part mounted in the camshaft gear and prevents the axial displacement of the pin.
  • the holding means is equipped with at least one flexible clamp leg, at the end of which there is a detent.
  • the clamp leg engages in the second recess, the locking lug the edge engages behind the recess when the holding means is on the other hand in contact with the outer surface of the camshaft gear.
  • the holding means has two clamp legs, which are connected via a tilting joint and engage in two corresponding recesses in a latching manner.
  • a spring action is to be provided which closes the two clamp legs.
  • the two ends of the clip legs equipped with the locking lugs thus form a clip head and the other ends of the clip legs form handles that are accessible from the outside. Because of the tilting joint, pressing the handles together causes the clamp head to be opened and thus unlocked.
  • the securing part which is equipped in particular with the pin and the two clamp legs resiliently connected via the tilt joint, as a one-piece injection-molded part made of plastic.
  • Such a securing part is, on the one hand, easy and inexpensive to manufacture and can be treated as a disposable item. In addition, it is extremely stable and lightweight.
  • a major advantage is that the pin can be manufactured with a high degree of accuracy of fit and it can be easily inserted into the bore due to the difference in material. With regard to the easy sliding in the bores with a high accuracy of fit and to compensate for possible manufacturing tolerances, it is particularly advantageous to equip the walls of the pin with axial slots that produce a limited radial flexibility.
  • the securing part is provided with a tamper-evident device, for example a seal, which breaks when the securing part is removed from the locking position for the first time and thus makes the manipulation visible.
  • a tamper-evident device for example a seal
  • two bores 2 are made, from which two camshafts 16 to be rotatably mounted in the cover 1 (see FIG Figure 5 ) stick out.
  • FIG 2 shows a camshaft gear 3 equipped according to the invention in the form of a gear, as it is mounted by means of a central bore 4 on ends of the camshafts 16 protruding from the bores 2 of the cover 1.
  • This in Figure 5 The module shown, consisting of the cover 1, the two camshafts 16 and the camshaft gears 3, is pre-assembled for direct assembly on the cylinder head of an internal combustion engine.
  • each of the camshafts is in the correct angular position for the actuation of the valves by an externally accessible and in Figure 3
  • the illustrated securing part 5 made of plastic is locked against unintentional rotation before or during assembly.
  • the securing part 5 mounted on the camshaft gear 3 first penetrates with a pin 6 a recess 7 in the form of a through hole made in the inner disk of the camshaft gear 3 seated on the camshaft 16.
  • the pin 6 extends through the through hole and with its tip 8 into the receptacle 9 designed as a securing hole ( Figure 1 ) into the cover 1.
  • the tip 8 of the securing part 5 is in the radial form fit with the receptacle 9 and fixes the camshaft 16 against rotation. They are there
  • the diameter of the through hole 7 and the receptacle 9 is such that they form a sliding fit for the pin 6.
  • the securing part 5 is designed overall in such a way that it can be removed from its previously locking position with a simple movement after the module has been mounted on the cylinder head. In the present case, the securing part 5 is completely removed and can be thrown away or reused.
  • two second recesses 10 are provided in the surface of the camshaft gear 3 symmetrically around the through hole 7.
  • Each clamp leg 11 has a latching nose 12 which engages behind an edge of the respective recess 10.
  • the securing part 5 with a contact surface 13 rests on the front edge of the recess 10 and thus on the surface of the camshaft gear.
  • the securing part 5 with the pin 6 and the two clamp legs 11 is injection-molded in one piece from plastic, the two clamp legs 11 being molded onto a bridge part 14 forming the contact surface 13 in such a way that the connection forms a resilient tilting joint.
  • the spring force caused by the one-piece construction closes the clamp legs 11 so that the latching lugs 12 engage when the securing part 5 is mounted.
  • the ends of the clamp legs 11 equipped with the latching lugs 12 form, as it were, a clamp head.
  • the other ends of the clamp legs form two externally accessible handles 15, which open the clamp head when pressed together in the direction of arrow A (arrow B).
  • FIG. 5 now shows the module with the cover 1 and two camshafts 16 mounted therein, the ends of which protrude from an end face 17 of the cover 1 and carry the camshaft gears 3.
  • the module is pre-assembled insofar as the camshafts 16 are secured against rotation in the predetermined angular position by means of the securing parts 5 used.
  • This module can be mounted directly on the cylinder head of an internal combustion engine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Claims (8)

  1. Module comprenant un élément de réception (1), se présentant notamment sous la forme d'un cadre de palier ou d'un couvercle, destiné à être disposé sur une culasse d'un moteur à combustion interne et comportant au moins un arbre à cames qui est monté en rotation dans l'élément de réception (1) et qui fait saillie de la face frontale de l'élément de réception (1) pour maintenir un pignon d'arbre à cames (3) et le module étant pré-assemblé en vue du montage direct sur la culasse,
    caractérisé en ce que
    en ce qui concerne le pré-assemblage, l'arbre à cames est verrouillé en rotation par une pièce de fixation (5) accessible de l'extérieur dans une position angulaire correcte pour l'actionnement des soupapes, la pièce de fixation (5) passant à travers un premier évidement (7) ménagé dans le pignon d'arbre à cames (3) et étant disposée dans une liaison anti-rotation par complémentarité de formes avec un logement (9) ménagé dans l'élément de réception (1), le premier évidement (7) étant conçu comme un alésage cylindrique qui est traversé par une broche cylindrique (6) de forme complémentaire de la pièce de fixation, le pignon d'arbre à cames (3) étant une roue dentée ou à courroie dans la surface de laquelle est ménagé le premier évidement (7) sous la forme d'un alésage destiné au passage d'une goupille (6) prévue sur la pièce de fixation (5), un ajustement coulissant étant prévu entre la broche (6) et l'alésage et la broche (6) s'étendant à travers l'alésage jusque dans le logement (9) ménagé dans l'élément de réception (1) et conçu comme un alésage de fixation, et un deuxième évidement (10) étant ménagé dans le pignon d'arbre à cames (3) pour maintenir la pièce de fixation (5), la pièce de fixation (5) étant équipée d'un moyen de retenue correspondant qui est en engagement avec le deuxième évidement (10) et fixant axialement la broche (6), et la pièce de fixation (5) pouvant être retirée de la position de verrouillage après que le module a été monté sur la culasse.
  2. Module selon la revendication 1,
    caractérisé en ce que
    le moyen de retenue comporte au moins une branche de serrage flexible (11) qui est pourvue d'un ergot d'encliquetage (12) et qui s'engage dans le deuxième évidement (10) ménagé dans le pignon d'arbre à cames (3), l'ergot d'encliquetage (12) s'engageant derrière le bord de l'évidement (10).
  3. Module selon la revendication 2,
    caractérisé en ce que
    le moyen de retenue comporte deux branches de serrage (11) qui sont reliées par une articulation basculante, une force de ressort fermant les branches de serrage, les extrémités des branches de serrage (11) pourvues des ergots d'encliquetage (12) formant une tête de serrage et les autres extrémités des branches de serrage formant des poignées (15) accessibles de l'extérieur qui ouvrent la tête de serrage lorsqu'elles sont compressées.
  4. Module selon l'une des revendications précédentes, caractérisé en ce que
    la pièce de fixation (5) pourvue de la broche (6) et du moyen de retenue est réalisée en matière synthétique sous la forme d'une pièce monobloc moulée par injection.
  5. Module selon l'une des revendications précédentes, caractérisé en ce que
    la broche (6) comporte une paroi fendue axialement pour produire une flexibilité radiale limitée.
  6. Module selon l'une des revendications précédentes, caractérisé en ce que
    la pièce de fixation (5) comporte un mécanisme d'inviolabilité qui permet de visualiser que la pièce de fixation (5) a été retirée de la position de verrouillage pour la première fois.
  7. Module selon l'une des revendications précédentes, caractérisé en ce que
    l'élément de réception (1) comporte des alésages destinés à recevoir l'arbre à cames, le corps de l'arbre à cames étant inséré dans les alésages à l'aide de paliers rotatifs au moyen d'un processus d'assemblage utilisant une dilatation thermique.
  8. Module selon l'une des revendications précédentes, caractérisé en ce que
    deux arbres à cames, dont les cames sont chacune dans la position angulaire correcte pour l'actionnement de deux rangées de soupapes, sont montés à rotation dans l'élément de réception (1), les arbres à cames étant verrouillés en rotation dans cette position angulaire par deux pièces de fixation (5) accessibles de l'extérieur qui peuvent être retirées de la position de verrouillage après le montage.
EP15713876.9A 2014-04-08 2015-03-30 Module équipé d'un arbre à cames pré-orienté Active EP3129615B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014104995.0A DE102014104995A1 (de) 2014-04-08 2014-04-08 Modul mit vororientierter Nockenwelle
PCT/EP2015/056902 WO2015155050A1 (fr) 2014-04-08 2015-03-30 Module équipé d'un arbre à cames pré-orienté

Publications (2)

Publication Number Publication Date
EP3129615A1 EP3129615A1 (fr) 2017-02-15
EP3129615B1 true EP3129615B1 (fr) 2020-11-11

Family

ID=52807803

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15713876.9A Active EP3129615B1 (fr) 2014-04-08 2015-03-30 Module équipé d'un arbre à cames pré-orienté

Country Status (9)

Country Link
US (1) US10260455B2 (fr)
EP (1) EP3129615B1 (fr)
JP (1) JP6498694B2 (fr)
KR (1) KR102295413B1 (fr)
CN (1) CN106164421B (fr)
BR (1) BR112016022999B1 (fr)
DE (1) DE102014104995A1 (fr)
MX (1) MX2016012987A (fr)
WO (1) WO2015155050A1 (fr)

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DE102021113562B4 (de) * 2021-05-26 2024-01-11 Schaeffler Technologies AG & Co. KG .Montagewerkzeug sowie Bausatz aus Montagewerkzeug und Nockenwellenversteller

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CN106164421B (zh) 2019-04-30
KR20160140711A (ko) 2016-12-07
JP2017510750A (ja) 2017-04-13
DE102014104995A1 (de) 2015-10-08
MX2016012987A (es) 2017-05-12
CN106164421A (zh) 2016-11-23
BR112016022999B1 (pt) 2023-04-11
KR102295413B1 (ko) 2021-08-30
US20170122252A1 (en) 2017-05-04
JP6498694B2 (ja) 2019-04-10
US10260455B2 (en) 2019-04-16
EP3129615A1 (fr) 2017-02-15
WO2015155050A1 (fr) 2015-10-15
BR112016022999A2 (fr) 2017-08-15

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