EP3379042B1 - Camshaft device and camshaft adjuster for a camshaft device - Google Patents

Camshaft device and camshaft adjuster for a camshaft device Download PDF

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Publication number
EP3379042B1
EP3379042B1 EP18155989.9A EP18155989A EP3379042B1 EP 3379042 B1 EP3379042 B1 EP 3379042B1 EP 18155989 A EP18155989 A EP 18155989A EP 3379042 B1 EP3379042 B1 EP 3379042B1
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EP
European Patent Office
Prior art keywords
camshaft
stator
fastening
camshaft adjuster
adjuster
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.)
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Application number
EP18155989.9A
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German (de)
French (fr)
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EP3379042A1 (en
Inventor
Markus Todt
Stephan Wanner
Andreas Berwinkl
René Heym
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Eco Holding 1 GmbH
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Eco Holding 1 GmbH
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Publication date
Priority claimed from DE102018101972.6A external-priority patent/DE102018101972A1/en
Application filed by Eco Holding 1 GmbH filed Critical Eco Holding 1 GmbH
Publication of EP3379042A1 publication Critical patent/EP3379042A1/en
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Publication of EP3379042B1 publication Critical patent/EP3379042B1/en
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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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • 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
    • 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
    • F01L2001/0471—Assembled camshafts
    • F01L2001/0473—Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod
    • 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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears

Definitions

  • the invention relates to a camshaft adjuster for a camshaft device having an inner camshaft and an outer camshaft arranged concentrically therewith, wherein the camshaft adjuster comprises at least one rotor, one stator and at least one compensating element for compensating axial and / or radial and / or angular tolerances and at least the stator indirectly via a drive wheel with the outer camshaft and the rotor with the inner camshaft rotatably connected, wherein the drive wheel as a separate component from the stator rotatably mounted on the outer camshaft fastened and the stator is rotatably mounted on the inner camshaft. Furthermore, the invention relates to a camshaft device.
  • adjustable cam with respect to their positioning on the camshaft, especially in valve-controlled internal combustion engines to a specific variation of the timing of the valves of the engine, so that the performance and consequently the exhaust emission of the engine can be adjusted.
  • an outer camshaft within which a coaxially mounted inner camshaft is arranged, is rotated relative to the inner camshaft.
  • the cams pivotally connected to the outer shaft but fixed to the inner camshaft are moved relative to the cams fixedly connected to the outer shaft.
  • a rotor which is mounted on a stator and the inner shaft is rotated relative to the outer shaft, so that a Phase shift of the valve timing allows and thus the opening duration of the valves can be varied.
  • Such double camshaft systems with an inner camshaft and an outer camshaft arranged concentrically to this require compared to single camshaft systems an improved tolerance compensation because position inaccuracies during operation and / or assembly of the individual components of the camshaft adjuster and the camshaft, in particular systemic required tolerances may occur. These inaccuracies can lead to an increased frictional torque up to a blocking of the individual components, in particular between the stator and the rotor.
  • a camshaft adjuster for controlling a double camshaft according to a layer structure with a first rotor-like output body and a second rotor-like output body is known, which are arranged parallel to each other with their Drehhofflève phenomena, each output body for laterally leading out of the Nockenwellenversteller scholar receiving at least one camshaft of the double camshaft is determined in which for the alignment of at least one output body to the double camshaft, a compensation element is provided to design important parts of a valve train for internal combustion engines, which has a camshaft as a gas exchange valve control shaft with two adjustable cams, which are in particular in the immediate vicinity.
  • the compensating element is a universal joint or a feather key.
  • a camshaft assembly with an inner and an outer camshaft and with a camshaft adjuster, in which a compensation element between the inner camshaft and a rotor of the camshaft adjuster is arranged.
  • the compensating element has a disc-like shape and a spherical cap-shaped contact surface for the inner camshaft, which has a correspondingly shaped end face.
  • the rotor of the phase adjuster is centered about a rotation axis by means of a screw connection flange, wherein a compliance element is arranged between the rotor and the screw connection flange, via which a torque can be transmitted while compensating for positional errors.
  • the object of the invention is to improve a camshaft adjuster for a camshaft device structurally and / or functionally.
  • Another object of the invention is to improve a camshaft device structurally and / or functionally.
  • a camshaft adjuster is proposed for a camshaft device with an inner camshaft and an outer camshaft arranged concentrically therewith.
  • the camshaft adjuster comprises at least one rotor and one stator, wherein the stator is at least indirectly rotatably connected via a drive wheel with the outer camshaft and the rotor with the inner camshaft, as well as with at least one compensating element to compensate for axial and / or radial and / or angular tolerances wherein the drive wheel (as a component separated from the stator rotatably fastened to the outer camshaft and the stator is rotatably mounted on the inner camshaft double camshaft systems require compared to systems with a single camshaft improved tolerance compensation, since inaccuracies in the manufacture and assembly
  • the camshaft adjuster which is preferably a camshaft adjuster of the vane-type, also requires small gap tolerances, so that tolerance and shape deviations to ei ner considerable impairment of the function of the cams
  • a plurality of compensation elements are provided, which are preferably arranged distributed uniformly in the circumferential direction, wherein the compensation elements in the circumferential direction designed torsionally rigid and are arranged between the stator and the axially spaced from the stator drive wheel and provided fixed.
  • the torsionally rigid design of the compensation elements enables a backlash-free, uniform torque transmission between the drive wheel and stator.
  • the compensation elements can be designed to be correspondingly flexible in all other directions, so that an axial and angular tolerance compensation is possible.
  • camshaft adjuster and drive wheel which is connected to a drive shaft of an internal combustion engine, advantageously forms a decoupling of the components.
  • the result is a variable interface, which only requires an adjustment of the compensation element with identical camshaft adjuster.
  • Each of the compensating elements has a central fastening section provided for attachment to the stator, on each of which an outer fastening section for attachment to the drive wheel adjoins. This embodiment enables an advantageous separation of the fastening sections.
  • the compensation elements are positively or materially connected to the stator and the drive wheel. All the joining techniques known to those skilled in the art come into question. By separating the camshaft adjuster and the drive wheel, a simple connection of the compensating elements with the camshaft adjuster or the drive wheel is possible.
  • the compensation elements can be provided fastened by means of a screw connection to the stator and the drive wheel.
  • a welded connection comes into question.
  • the compensation elements are provided formed of spring steel.
  • a trained from spring steel compensating element is particularly suitable for providing a flexible connection that allows a necessary tolerance compensation.
  • a corrugated intermediate section is provided between the middle fastening section and the outer fastening sections.
  • the corrugated intermediate section offers the possibility of adapting the flexibility of the compensating element to the given properties of a camshaft adjuster.
  • the middle attachment portion may be preferably attached to a cover member of the stator, wherein the cover member for mounting the middle attachment portion has radially formed attachment projections.
  • the fastening projections allow easy mounting of the compensating element. At the same time, a weakening of the cover element in the region of the rotor can be avoided.
  • the fastening projections each have two holes for attachment of the central mounting portion, which are arranged on a first pitch circle about the central axis of the camshaft adjuster.
  • middle attachment portion each has two holes for attachment to the lid member and the outer mounting portion is provided in each case a bore for attachment to the drive wheel, wherein the holes of the central mounting portion and the holes of the outer mounting portions arranged on a common, second pitch circle are, which is identical to the first pitch circle.
  • the rotor is preferably connected by means of a central screw with the inner camshaft. According to one embodiment of the invention, a connection piece between the central screw and the rotor can be interposed.
  • camshaft device with an inner camshaft and an outer camshaft arranged concentrically therewith, a drive wheel mounted on the outer camshaft, and a camshaft adjuster are proposed.
  • Fig. 1 shows a section of a camshaft device 1 with two coaxial camshafts 2, 3, a camshaft adjuster 4 and a plurality of compensating elements 5 in a sectional view.
  • the camshaft device 1 has an inner camshaft 2 and an outer camshaft 3, wherein the inner camshaft 2 is a solid shaft and the outer camshaft 3 is a hollow shaft.
  • the inner camshaft 2 is disposed inside the outer camshaft 3, so that the camshafts 2, 3 are arranged concentrically and coaxially with each other.
  • the camshafts 2, 3 may form a central camshaft for an internal combustion engine. A relative rotation of the camshafts 2, 3 to each other in this case causes a shift inlet and / or outlet side timing between "early" and "late”. Likewise, the camshafts 2, 3 may form one of two camshafts for an internal combustion engine. A relative rotation of the camshafts 2, 3 to each other then causes an extension or shortening inlet or outlet side timing.
  • the camshafts 2, 3 each have an end 6, 7 facing the camshaft adjuster 4, the end 6 of the inner camshaft 2 protruding toward the camshaft adjuster 4 with respect to the end of the outer camshaft 7.
  • the camshaft adjuster 4 which is designed as diegelzellenversteller, has a rotor 8 and a stator 9, which are rotatable relative to each other limited.
  • the stator 9 has a cylindrical stator base body 10 and two cover elements 11, 12 fastened thereon by means of screw elements 34.
  • the stator 9 is connected at least indirectly via a drive wheel 13 with the outer camshaft 3.
  • the drive wheel 13 is connected to a crankshaft, not shown, as the drive shaft of the internal combustion engine. For this purpose, it has an external toothing 14.
  • the drive wheel may be formed as a pulley or sprocket. How out FIG. 1 seen, the drive wheel 13 is rotatably connected to the outer camshaft 3.
  • the rotor 8 of the camshaft adjuster 4 is non-rotatably connected to the inner camshaft 2, which, as already described, projects beyond the outer camshaft 3.
  • a central screw 15 is provided, which is screwed into a bore 16 of the inner camshaft 2.
  • a screw head 17 of the central screw 15 braces the rotor 8 with the interposition of a connecting piece 18 in the axial direction against the end 6 of the inner camshaft 2.
  • the rotatably mounted and sealed in a housing 19 fitting 18 has indicated hydraulic channels 20, 21 for controlling the camshaft adjuster on.
  • Double camshaft systems with inner and outer camshafts 2, 3 require improved tolerance compensation compared to systems with a single camshaft, since inaccuracies in the manufacture and assembly of the two camshafts 2, 3 to each other can lead to jamming or increased friction.
  • the camshaft adjuster 4 also requires small gap tolerances, so that tolerance, shape and position deviations can lead to a significant impairment of the function of the camshaft devices.
  • the camshaft device 1 At least a plurality of evenly distributed circumferentially compensation elements 5.
  • the compensating elements 5 are torsionally rigid in the circumferential direction and arranged in the axial direction between the drive wheel 5 and the left side in the drawing arranged cover member 12 of the stator 9.
  • a positive or cohesive fastening eg screwing, welding, etc.
  • a screw connection between compensating element 5 and cover element 12 or drive wheel 13 is shown.
  • the compensating element 5 has at its ends in each case a screw eye 22, 23, which in each case by means of a Screwing 24, 25 are fixed to the lid member 12 and the drive wheel 13.
  • the compensating element 5 is preferably made of spring steel, which is particularly suitable for providing a flexible connection that allows a necessary tolerance compensation. At the same time a torque can be safely transmitted without play between the drive wheel 13 and the lid member 12.
  • the eyelets 22, 23 of the compensating element 5 are connected by a web 26, the shape of which allows separation of the drive wheel 13 and cover element 12 in the axial direction. Through this separation of the camshaft adjuster 4 and the drive wheel 12, a decoupling of the components is possible, so that a variable interface is formed, which only requires an adaptation of the compensation element 5 with identical camshaft adjuster 4.
  • the embodiment shown has a stepped web 26.
  • FIGS. 2 to 11 Another embodiment of the invention is in the FIGS. 2 to 11 shown in more detail.
  • the same or similar components are provided with the same reference numerals.
  • FIGS. 9 to 11 show one of the identically formed compensation elements 5 in an enlarged view and partly as a section. It can be seen that the compensating element 5 has a middle fastening section provided for attachment to the stator 9, on each of which an outer fastening section 28 for attachment to the drive wheel 13 adjoins.
  • the attachment portions 27, 28 are thereby advantageously separated from each other, whereby the assembly can be substantially simplified.
  • a corrugated intermediate section 29 is provided in each case between the middle fastening section 27 and the outer fastening sections 28, which offers the possibility of adapting the flexibility of the compensating element 5 to the given properties of a camshaft adjuster 4 by adapting the wave profile.
  • the middle mounting portion is fixed to the lid member 12 of the stator 9, the so-called locking disc, wherein the cover member 12 for mounting the central mounting portion 27 has radially formed fastening projections 30.
  • the intermediate portions 29 and the outer mounting portions project beyond the mounting projections 30 and extend thereafter the mounting on the stator 9 respectively opposite in the circumferential direction, which in particular from FIG. 6 clearly shows.
  • the camshaft adjuster 4 of the second exemplary embodiment has three compensating elements 5 distributed uniformly in the circumferential direction. It is also conceivable uniform arrangement of only two or more than three compensation elements 5. In this case, the arrangement of the compensation elements 5 influences the power flow in the torque transmission.
  • the fastening projections 30 of the locking disc each have two holes 31 for fastening the central fastening sections 27, which are located on a, in FIG. 4 shown first pitch circle K1 are arranged about the central axis M of the camshaft adjuster 4.
  • the middle mounting portion 27 each has two corresponding holes 32 for attachment to the lid member 12 and the outer mounting portion 28 is provided in each case a bore 33 for attachment to the drive wheel 13, wherein the bores 32 of the central mounting portion 27 and the holes 33 of the outer mounting portions 28th are arranged on a common, second pitch circle K2, which is identical to the first pitch circle K1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Description

Erfindung betrifft einen Nockenwellenversteller für eine Nockenwelleneinrichtung mit einer inneren Nockenwelle und einer zur dieser konzentrisch angeordneten äußeren Nockenwelle, wobei der Nockenwellenversteller wenigstens einen Rotor, einen Stator sowie wenigstens ein Ausgleichselement zum Ausgleich axialer und/oder radialer und/oder angularer Toleranzen aufweist und der Stator wenigstens mittelbar über ein Antriebsrad mit der äußeren Nockenwelle und der Rotor mit der inneren Nockenwelle drehfest verbindbar ist, wobei das Antriebsrad als ein von dem Stator separiertes Bauteil drehfest auf der äußeren Nockenwelle befestigbar und der Stator drehbar auf der inneren Nockenwelle lagerbar ist. Ferner betrifft die Erfindung eine Nockenwelleneinrichtung.The invention relates to a camshaft adjuster for a camshaft device having an inner camshaft and an outer camshaft arranged concentrically therewith, wherein the camshaft adjuster comprises at least one rotor, one stator and at least one compensating element for compensating axial and / or radial and / or angular tolerances and at least the stator indirectly via a drive wheel with the outer camshaft and the rotor with the inner camshaft rotatably connected, wherein the drive wheel as a separate component from the stator rotatably mounted on the outer camshaft fastened and the stator is rotatably mounted on the inner camshaft. Furthermore, the invention relates to a camshaft device.

Es ist bekannt, verstellbare Nocken hinsichtlich ihrer Positionierung auf der Nockenwelle insbesondere bei ventilgesteuerten Verbrennungsmotoren zu einer gezielten Variation der Steuerzeiten der Ventile des Verbrennungsmotors einzusetzen, sodass die Leistung sowie folglich die Abgasemission des Motors angepasst werden können. Zur Verstellung zumindest eines Nockens wird eine äußere Nockenwelle, innerhalb derer eine koaxial gelagerte innere Nockenwelle angeordnet ist, relativ zu der inneren Nockenwelle verdreht. Dadurch werden die drehbar mit der äußeren Welle, jedoch fest mit der inneren Nockenwelle verbundenen Nocken relativ zu den fest mit der äußeren Welle verbundenen Nocken bewegt. Zur Verstellung der Nocken zueinander dient ein Rotor, der an einem Stator gelagert ist und die innere Welle relativ zur äußeren Welle verdreht, sodass eine Phasenverschiebung der Ventilsteuerzeiten ermöglicht und somit die Öffnungsdauer der Ventile variiert werden kann.It is known to use adjustable cam with respect to their positioning on the camshaft, especially in valve-controlled internal combustion engines to a specific variation of the timing of the valves of the engine, so that the performance and consequently the exhaust emission of the engine can be adjusted. For adjusting at least one cam, an outer camshaft, within which a coaxially mounted inner camshaft is arranged, is rotated relative to the inner camshaft. As a result, the cams pivotally connected to the outer shaft but fixed to the inner camshaft are moved relative to the cams fixedly connected to the outer shaft. To adjust the cam to each other is a rotor which is mounted on a stator and the inner shaft is rotated relative to the outer shaft, so that a Phase shift of the valve timing allows and thus the opening duration of the valves can be varied.

Derartige Doppelnockenwellensysteme mit einer inneren Nockenwelle und einer zur dieser konzentrisch angeordneten äußeren Nockenwelle erfordern im Vergleich zu Systemen mit einer einzigen Nockenwelle einen verbesserten Toleranzausgleich, da Positionsungenauigkeiten beim Betrieb und/oder bei der Montage der einzelnen Bauteile des Nockenwellenverstellers und der Nockenwellen, die insbesondere von systembedingt erforderlichen Toleranzen verursacht werden, auftreten können. Diese Ungenauigkeiten können zu einem erhöhten Reibmoment bis hin zu einem Blockieren der einzelnen Bauteile insbesondere zwischen dem Stator und dem Rotor führen.Such double camshaft systems with an inner camshaft and an outer camshaft arranged concentrically to this require compared to single camshaft systems an improved tolerance compensation because position inaccuracies during operation and / or assembly of the individual components of the camshaft adjuster and the camshaft, in particular systemic required tolerances may occur. These inaccuracies can lead to an increased frictional torque up to a blocking of the individual components, in particular between the stator and the rotor.

Aus der DE 10 2008 033 230 A1 ist beispielsweise ein Nockenwellenversteller zur Steuerung einer Doppelnockenwelle nach einem Schichtaufbau mit einem ersten rotorartigen Abtriebskörper und einem zweiten rotorartigen Abtriebskörper bekannt, die zueinander mit ihren Drehflügelkörperteilen parallel angeordnet sind, wobei jeder Abtriebskörper zur seitlich aus dem Nockenwellenverstellerzentrum herausführenden Aufnahme wenigstens einer Nockenwelle der Doppelnockenwelle bestimmt ist, bei dem zur Ausrichtung wenigstens eines Abtriebskörpers zur Doppelnockenwelle ein Ausgleichselement vorgesehen ist, um wichtige Teile eines Ventiltriebs für Verbrennungskraftmaschinen zu entwerfen, welcher eine Nockenwelle wie eine Gaswechselventilsteuerungswelle mit zwei zueinander verstellbaren Nocken, die sich insbesondere in unmittelbarer Nachbarschaft befinden, aufweist. Der DE 10 2008 033 230 A1 zufolge ist das Ausgleichselement ein Kreuzgelenk oder eine Passfeder.From the DE 10 2008 033 230 A1 For example, a camshaft adjuster for controlling a double camshaft according to a layer structure with a first rotor-like output body and a second rotor-like output body is known, which are arranged parallel to each other with their Drehflügelkörperteilen, each output body for laterally leading out of the Nockenwellenverstellerzentrum receiving at least one camshaft of the double camshaft is determined in which for the alignment of at least one output body to the double camshaft, a compensation element is provided to design important parts of a valve train for internal combustion engines, which has a camshaft as a gas exchange valve control shaft with two adjustable cams, which are in particular in the immediate vicinity. Of the DE 10 2008 033 230 A1 According to the compensating element is a universal joint or a feather key.

Aus der DE 10 2012 105 284 A1 ist eine Nockenwellenanordnung mit einer inneren und einer äußeren Nockenwelle sowie mit einem Nockenwellenversteller bekannt, bei welcher ein Ausgleichselement zwischen der inneren Nockenwelle und einem Rotor des Nockenwellenverstellers angeordnet ist. Das Ausgleichselement hat eine scheibenartige Form sowie eine kugelkalotten-förmige Anlagefläche für die innere Nockenwelle, welche eine entsprechend ausgebildete Stirnfläche aufweist.From the DE 10 2012 105 284 A1 is known a camshaft assembly with an inner and an outer camshaft and with a camshaft adjuster, in which a compensation element between the inner camshaft and a rotor of the camshaft adjuster is arranged. The compensating element has a disc-like shape and a spherical cap-shaped contact surface for the inner camshaft, which has a correspondingly shaped end face.

Der DE 10 2015 113 356 A1 ist eine verstellbare Nockenwelle mit einem Phasenversteller zu entnehmen. Der Rotor des Phasenverstellers ist mittels eines Verschraubungsflansches um eine Rotationsachse zentriert, wobei zwischen Rotor und dem Verschraubungsflansch ein Nachgiebigkeitselement angeordnet ist, über das ein Drehmoment unter Ausgleich von Lagefehlern übertragbar ist.Of the DE 10 2015 113 356 A1 is an adjustable camshaft with a phaser to remove. The rotor of the phase adjuster is centered about a rotation axis by means of a screw connection flange, wherein a compliance element is arranged between the rotor and the screw connection flange, via which a torque can be transmitted while compensating for positional errors.

Aufgabe der Erfindung ist es, einen Nockenwellenversteller für eine Nockenwelleneinrichtung baulich und/oder funktional zu verbessern.The object of the invention is to improve a camshaft adjuster for a camshaft device structurally and / or functionally.

Eine weitere Aufgabe der Erfindung ist es, eine Nockenwelleneinrichtung baulich und/oder funktional zu verbessern.Another object of the invention is to improve a camshaft device structurally and / or functionally.

Es wird ein Nockenwellenversteller für eine Nockenwelleneinrichtung mit einer inneren Nockenwelle und einer zur dieser konzentrisch angeordneten äußeren Nockenwelle vorgeschlagen. Der Nockenwellenversteller umfasst wenigstens einen Rotor und einen Stator, wobei der Stator wenigstens mittelbar über ein Antriebsrad mit der äußeren Nockenwelle und der Rotor mit der inneren Nockenwelle drehfest verbindbar ist, sowie mit wenigstens einem Ausgleichselement zum Ausgleich axialer und/oder radialer und/oder angularer Toleranzen, wobei das Antriebsrad (als ein von dem Stator separiertes Bauteil drehfest auf der äußeren Nockenwelle befestigbar und der Stator drehbar auf der inneren Nockenwelle lagerbar ist Doppelnockenwellensysteme erfordern im Vergleich zu Systemen mit einer einzigen Nockenwelle einen verbesserten Toleranzausgleich, da Ungenauigkeiten bei der Herstellung und der Montage der beiden Nockenwellen zueinander zu einem Verklemmen oder zu erhöhten Reibwerten führen können. Der Nockenwellenversteller, welcher vorzugsweise ein Nockenwellenversteller des Flügelzellentyps, erfordert zudem geringe Spalttoleranzen, so dass Toleranz- und Formabweichungen zu einer erheblichen Beeinträchtigung der Funktion der Nockenwelleneinrichtungen führen können.A camshaft adjuster is proposed for a camshaft device with an inner camshaft and an outer camshaft arranged concentrically therewith. The camshaft adjuster comprises at least one rotor and one stator, wherein the stator is at least indirectly rotatably connected via a drive wheel with the outer camshaft and the rotor with the inner camshaft, as well as with at least one compensating element to compensate for axial and / or radial and / or angular tolerances wherein the drive wheel (as a component separated from the stator rotatably fastened to the outer camshaft and the stator is rotatably mounted on the inner camshaft double camshaft systems require compared to systems with a single camshaft improved tolerance compensation, since inaccuracies in the manufacture and assembly The camshaft adjuster, which is preferably a camshaft adjuster of the vane-type, also requires small gap tolerances, so that tolerance and shape deviations to ei ner considerable impairment of the function of the camshaft devices can lead.

Erfindungsgemäß sind mehrere Ausgleichselemente vorgesehen, welche vorzugsweise gleichmäßig in Umfangsrichtung verteilt angeordnet vorgesehen sind, wobei die Ausgleichselemente in Umfangsrichtung drehsteif ausgebildet und zwischen dem Stator und dem von dem Stator axial beabstandeten Antriebsrad angeordnet und befestigt vorgesehen sind. Die drehsteife Ausbildung der Ausgleichselemente ermöglicht eine spielfreie, gleichmäßige Drehmomentübertragung zwischen Antriebsrad und Stator. Gleichzeitig können die Ausgleichselemente in allen anderen Richtungen entsprechend flexibel ausgebildet werden, so dass ein axialer und angularer Toleranzausgleich möglich ist.According to the invention a plurality of compensation elements are provided, which are preferably arranged distributed uniformly in the circumferential direction, wherein the compensation elements in the circumferential direction designed torsionally rigid and are arranged between the stator and the axially spaced from the stator drive wheel and provided fixed. The torsionally rigid design of the compensation elements enables a backlash-free, uniform torque transmission between the drive wheel and stator. At the same time, the compensation elements can be designed to be correspondingly flexible in all other directions, so that an axial and angular tolerance compensation is possible.

Die Separierung von Nockenwellenversteller und Antriebsrad, welches mit einer Antriebswelle einer Brennkraftmaschine verbunden ist, bildet dabei vorteilhafterweise eine Entkopplung der Bauteile. Es entsteht eine variable Schnittstelle, welche bei baugleichem Nockenwellenversteller lediglich eine Anpassung des Ausgleichselementes erfordert.The separation of camshaft adjuster and drive wheel, which is connected to a drive shaft of an internal combustion engine, advantageously forms a decoupling of the components. The result is a variable interface, which only requires an adjustment of the compensation element with identical camshaft adjuster.

Die Ausgleichselemente weisen jeweils einen zur Befestigung am Stator vorgesehenen mittleren Befestigungsabschnitt auf, an welchem sich jeweils endseitig ein äußerer Befestigungsabschnitt zur Befestigung am Antriebsrad anschließt. Diese Ausgestaltung ermöglicht eine vorteilhafte Trennung der Befestigungsabschnitte.Each of the compensating elements has a central fastening section provided for attachment to the stator, on each of which an outer fastening section for attachment to the drive wheel adjoins. This embodiment enables an advantageous separation of the fastening sections.

Gemäß einer vorteilhaften Ausbildung der Erfindung sind die Ausgleichselemente form- oder stoffschlüssig mit dem Stator und dem Antriebsrad verbunden. Dabei kommen alle dem Fachmann bekannten Verbindungstechniken in Frage. Durch die Separierung von Nockenwellenversteller und Antriebsrad ist eine einfache Verbindung der Ausgleichselemente mit dem Nockenwellenversteller bzw. dem Antriebsrad möglich.According to an advantageous embodiment of the invention, the compensation elements are positively or materially connected to the stator and the drive wheel. All the joining techniques known to those skilled in the art come into question. By separating the camshaft adjuster and the drive wheel, a simple connection of the compensating elements with the camshaft adjuster or the drive wheel is possible.

In einfacher und kostengünstiger Weise können die Ausgleichselemente jeweils mittels einer Schraubverbindung an dem Stator und dem Antriebsrad befestigbar vorgesehen sein. Alternativ kommt eine Schweißverbindung in Frage.In a simple and cost-effective manner, the compensation elements can be provided fastened by means of a screw connection to the stator and the drive wheel. Alternatively, a welded connection comes into question.

Gemäß einer vorteilhaften Ausführungsform der Erfindung sind die Ausgleichselemente aus Federstahl ausgebildet vorgesehen. Ein aus Federstahl ausgebildetes Ausgleichselement eignet sich besonders zur Bereitstellung einer flexiblen Verbindung, die einen notwendigen Toleranzausgleich zulässt.According to an advantageous embodiment of the invention, the compensation elements are provided formed of spring steel. A trained from spring steel compensating element is particularly suitable for providing a flexible connection that allows a necessary tolerance compensation.

Gemäß einer vorteilhaften Ausführungsform ist zwischen dem mittleren Befestigungsabschnitt und den äußeren Befestigungsabschnitten jeweils ein gewellter Zwischenabschnitt vorgesehen. Der gewellte Zwischenabschnitt bietet die Möglichkeit, die Flexibilität des Ausgleichselements an die vorgegebenen Eigenschaften eines Nockenwellenverstellers anzupassen.According to an advantageous embodiment, in each case a corrugated intermediate section is provided between the middle fastening section and the outer fastening sections. The corrugated intermediate section offers the possibility of adapting the flexibility of the compensating element to the given properties of a camshaft adjuster.

Der mittlere Befestigungsabschnitt kann vorzugsweise an einem Deckelelement des Stators befestigt sein, wobei das Deckelelement zur Anordnung des mittleren Befestigungsabschnitts radial ausgebildete Befestigungsvorsprünge aufweist. Die Befestigungsvorsprünge ermöglichen eine einfache Montage des Ausgleichselements. Gleichzeitig kann eine Schwächung des Deckelements im Bereich des Rotors vermieden werden.The middle attachment portion may be preferably attached to a cover member of the stator, wherein the cover member for mounting the middle attachment portion has radially formed attachment projections. The fastening projections allow easy mounting of the compensating element. At the same time, a weakening of the cover element in the region of the rotor can be avoided.

Vorzugsweise weisen die Befestigungsvorsprünge jeweils zwei Bohrungen zur Befestigung des mittleren Befestigungsabschnittes auf, welche auf einem ersten Teilkreis um die Mittelachse des Nockenwellenverstellers angeordnet sind.Preferably, the fastening projections each have two holes for attachment of the central mounting portion, which are arranged on a first pitch circle about the central axis of the camshaft adjuster.

Gemäß einer vorteilhaften Ausführung der Erfindung weist mittlere Befestigungsabschnitt jeweils zwei Bohrungen zur Befestigung am Deckelelement auf und am äußeren Befestigungsabschnitt ist jeweils eine Bohrung zur Befestigung am Antriebsrad vorgesehen, wobei die Bohrungen des mittleren Befestigungsabschnittes und die Bohrungen der äußeren Befestigungsabschnitte auf einem gemeinsamen, zweiten Teilkreis angeordnet sind, welcher identisch zum ersten Teilkreises ist. Hierdurch kann der Kraftfluss bei der Drehmomentübertragung zwischen Antriebsrad und Stator optimiert werden.According to an advantageous embodiment of the invention, middle attachment portion each has two holes for attachment to the lid member and the outer mounting portion is provided in each case a bore for attachment to the drive wheel, wherein the holes of the central mounting portion and the holes of the outer mounting portions arranged on a common, second pitch circle are, which is identical to the first pitch circle. As a result, the power flow in the torque transmission between the drive wheel and stator can be optimized.

Der Rotor ist vorzugsweise mittels einer Zentralschraube mit der inneren Nockenwelle verbunden. Gemäß einer Weiterbildung der Erfindung kann ein Anschlussstück zwischen der Zentralschraube und dem Rotor zwischengeschaltet sein.The rotor is preferably connected by means of a central screw with the inner camshaft. According to one embodiment of the invention, a connection piece between the central screw and the rotor can be interposed.

Weiter wird eine Nockenwelleneinrichtung mit einer inneren Nockenwelle und einer zur dieser konzentrisch angeordneten äußeren Nockenwelle, einem auf der äußeren Nockenwelle befestigten Antriebsrad sowie einem Nockenwellenversteller vorgeschlagen.Furthermore, a camshaft device with an inner camshaft and an outer camshaft arranged concentrically therewith, a drive wheel mounted on the outer camshaft, and a camshaft adjuster are proposed.

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In den Zeichnungen sind Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnungen, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Es zeigt:

Figur 1
eine Nockenwelleneinrichtung mit zwei koaxialen Nockenwellen, einem Nockenwellenversteller, einem Antriebsrad und einem Ausgleichselement in Schnittdarstellung;
Figur 2
ein weiteres Ausführungsbeispiel eines Nockenwellenverstellers mit Ausgleichselement in einer ersten perspektivischen Darstellung;
Figur 3
eine Rückansicht des Nockenwellenverstellers gemäß Figur 2 in einer zweiten perspektivischen Darstellung;
Figur 4
eine Rückansicht des Nockenwellenverstellers gemäß Figur 2;
Figur 5
eine Seitenansicht des Nockenwellenverstellers gemäß Figur 2;
Figur 6
eine Vorderansicht des Nockenwellenverstellers gemäß Figur 2;
Figur 7
einen Querschnitt entlang C-C des Nockenwellenverstellers gemäß Figur 2;
Figur 8
eine Explosionsdarstellung des Nockenwellenverstellers gemäß Figur 2;
Figur 9
eine vergrößerte perspektivischer Ansicht des Ausgleichselements des Nockenwellenverstellers gemäß Fig. 2;
Figur 10
eine Vorderansicht des Ausgleichselements gemäß Fig. 9 und
Figur 11
einen Schnitt entlang A-A des Ausgleichselements gemäß Fig. 10;
It shows:
FIG. 1
a camshaft device with two coaxial camshafts, a phaser, a drive wheel and a compensation element in a sectional view;
FIG. 2
a further embodiment of a camshaft adjuster with compensation element in a first perspective view;
FIG. 3
a rear view of the camshaft adjuster according to FIG. 2 in a second perspective view;
FIG. 4
a rear view of the camshaft adjuster according to FIG. 2 ;
FIG. 5
a side view of the camshaft adjuster according to FIG. 2 ;
FIG. 6
a front view of the camshaft adjuster according to FIG. 2 ;
FIG. 7
a cross section along CC of the camshaft adjuster according to FIG. 2 ;
FIG. 8
an exploded view of the camshaft adjuster according to FIG. 2 ;
FIG. 9
an enlarged perspective view of the compensating element of the camshaft adjuster according to Fig. 2 ;
FIG. 10
a front view of the compensating element according to Fig. 9 and
FIG. 11
a section along AA of the compensating element according to Fig. 10 ;

Fig. 1 zeigt einen Ausschnitt einer Nockenwelleneinrichtung 1 mit zwei koaxialen Nockenwellen 2, 3, einem Nockenwellenversteller 4 und mehreren Ausgleichselementen 5 in Schnittdarstellung. Die Nockenwelleneinrichtung 1 weist eine innere Nockenwelle 2 und eine äußere Nockenwelle 3 auf, wobei die innere Nockenwelle 2 eine Vollwelle und die äußere Nockenwelle 3 ist eine Hohlwelle ist. Die innere Nockenwelle 2 ist innerhalb der äußeren Nockenwelle 3 angeordnet, so dass die Nockenwellen 2, 3 zueinander konzentrisch und koaxial angeordnet sind. Die Nockenwellen 2, 3, welche eine zentrale Nockenwelle für eine Brennkraftmaschine bilden können, weisen jeweils Nocken auf und sind relativ zueinander begrenzt verdrehbar. Die Nockenwellen 2, 3 können eine zentrale Nockenwelle für eine Brennkraftmaschine bilden. Eine relative Verdrehung der Nockenwellen 2, 3 zueinander bewirkt in diesem Fall eine Verschiebung einlass-und/oder auslassseitiger Steuerzeiten zwischen "früh" und "spät". Ebenso können die Nockenwellen 2, 3 eine von zwei Nockenwellen für eine Brennkraftmaschine bilden. Eine relative Verdrehung der Nockenwellen 2, 3 zueinander bewirkt dann eine Verlängerung oder Verkürzung einlass- oder auslassseitiger Steuerzeiten. Fig. 1 shows a section of a camshaft device 1 with two coaxial camshafts 2, 3, a camshaft adjuster 4 and a plurality of compensating elements 5 in a sectional view. The camshaft device 1 has an inner camshaft 2 and an outer camshaft 3, wherein the inner camshaft 2 is a solid shaft and the outer camshaft 3 is a hollow shaft. The inner camshaft 2 is disposed inside the outer camshaft 3, so that the camshafts 2, 3 are arranged concentrically and coaxially with each other. The camshafts 2, 3, which can form a central camshaft for an internal combustion engine, each have cams and are rotatable limited relative to each other. The camshafts 2, 3 may form a central camshaft for an internal combustion engine. A relative rotation of the camshafts 2, 3 to each other in this case causes a shift inlet and / or outlet side timing between "early" and "late". Likewise, the camshafts 2, 3 may form one of two camshafts for an internal combustion engine. A relative rotation of the camshafts 2, 3 to each other then causes an extension or shortening inlet or outlet side timing.

Die Nockenwellen 2, 3 weisen jeweils ein dem Nockenwellenversteller 4 zugewandtes Ende 6, 7 auf, wobei das Ende 6 der inneren Nockenwelle 2 zu dem Nockenwellenversteller 4 hin gegenüber dem Ende der äußeren Nockenwelle 7 übersteht.The camshafts 2, 3 each have an end 6, 7 facing the camshaft adjuster 4, the end 6 of the inner camshaft 2 protruding toward the camshaft adjuster 4 with respect to the end of the outer camshaft 7.

Der Nockenwellenversteller 4, welcher als Flügelzellenversteller ausgebildet ist, weist einen Rotor 8 und einen Stator 9 auf, welche relativ zueinander begrenzt verdrehbar sind. Der Stator 9 weist im gezeigten Ausführungsbeispiel einen zylindrischen Statorgrundkörper 10 und zwei darauf abgedichtet mittels Schraubelementen 34 befestigten Deckelelementen 11, 12 auf. Der Stator 9 ist wenigstens mittelbar über ein Antriebsrad 13 mit der äußeren Nockenwelle 3 verbunden. Das Antriebsrad 13 ist mit einer nicht dargestellten Kurbelwelle als Antriebswelle der Brennkraftmaschine verbunden. Hierzu weist es eine Außenverzahnung 14 auf. Alternativ kann das Antriebsrad als Riemenrad oder Kettenrad ausgebildet sein. Wie aus Figur 1 ersichtlich, ist das Antriebsrad 13 mit der äußeren Nockenwelle 3 drehfest verbunden.The camshaft adjuster 4, which is designed as Flügelzellenversteller, has a rotor 8 and a stator 9, which are rotatable relative to each other limited. In the exemplary embodiment shown, the stator 9 has a cylindrical stator base body 10 and two cover elements 11, 12 fastened thereon by means of screw elements 34. The stator 9 is connected at least indirectly via a drive wheel 13 with the outer camshaft 3. The drive wheel 13 is connected to a crankshaft, not shown, as the drive shaft of the internal combustion engine. For this purpose, it has an external toothing 14. Alternatively, the drive wheel may be formed as a pulley or sprocket. How out FIG. 1 seen, the drive wheel 13 is rotatably connected to the outer camshaft 3.

Der Rotor 8 des Nockenwellenverstellers 4 ist dagegen mit der inneren Nockenwelle 2 drehfest verbunden, welche wie bereits beschrieben die äußere Nockenwelle 3 überragt. Zur Verbindung des Rotors 8 mit der inneren Nockenwelle 2 ist eine Zentralschraube 15 vorgesehen, welche in eine Bohrung 16 der inneren Nockenwelle 2 eingeschraubt ist. Ein Schraubenkopf 17 der Zentralschraube 15 verspannt dabei den Rotor 8 unter Zwischenschaltung eines Anschlussstückes 18 in axialer Richtung gegen das Ende 6 der inneren Nockenwelle 2. Das in einem Gehäuse 19 drehbar gelagerte und abgedichtete Anschlussstück 18 weist angedeutete Hydraulikkanäle 20, 21 zur Steuerung des Nockenwellenverstellers 4 auf.The rotor 8 of the camshaft adjuster 4, however, is non-rotatably connected to the inner camshaft 2, which, as already described, projects beyond the outer camshaft 3. To connect the rotor 8 with the inner camshaft 2, a central screw 15 is provided, which is screwed into a bore 16 of the inner camshaft 2. A screw head 17 of the central screw 15 braces the rotor 8 with the interposition of a connecting piece 18 in the axial direction against the end 6 of the inner camshaft 2. The rotatably mounted and sealed in a housing 19 fitting 18 has indicated hydraulic channels 20, 21 for controlling the camshaft adjuster on.

Doppelnockenwellensysteme mit innerer und äußerer Nockenwelle 2, 3 erfordern im Vergleich zu Systemen mit einer einzigen Nockenwelle einen verbesserten Toleranzausgleich, da Ungenauigkeiten bei der Herstellung und der Montage der beiden Nockenwellen 2, 3 zueinander zu einem Verklemmen oder zu erhöhten Reibwerten führen können. Der Nockenwellenversteller 4 erfordert zudem geringe Spalttoleranzen, so dass Toleranz, Form-und Lageabweichungen zu einer erheblichen Beeinträchtigung der Funktion der Nockenwelleneinrichtungen führen können.Double camshaft systems with inner and outer camshafts 2, 3 require improved tolerance compensation compared to systems with a single camshaft, since inaccuracies in the manufacture and assembly of the two camshafts 2, 3 to each other can lead to jamming or increased friction. The camshaft adjuster 4 also requires small gap tolerances, so that tolerance, shape and position deviations can lead to a significant impairment of the function of the camshaft devices.

Zum Ausgleich der axialen und angularen Toleranzen weist die Nockenwelleneinrichtung 1 wenigstens mehrere in Umfangsrichtung gleichmäßig verteilte Ausgleichselemente 5 auf.To compensate for the axial and angular tolerances, the camshaft device 1 at least a plurality of evenly distributed circumferentially compensation elements 5.

Die Ausgleichselemente 5 sind in Umfangsrichtung drehsteif ausgebildet und in axialer Richtung zwischen dem Antriebsrad 5 und dem in der Zeichnung linksseitig angeordneten Deckelelement 12 des Stators 9 angeordnet. Dabei ist eine form- oder stoffschlüssige Befestigung (z.B. Anschrauben, Anschweißen etc.) denkbar. Dargestellt ist beispielhaft eine Schraubverbindung zwischen Ausgleichselement 5 und Deckelelement 12 bzw. Antriebsrad 13. Hierzu weist das Ausgleichselement 5 an seinen Enden jeweils eine Schrauböse 22, 23 auf, welche jeweils mittels eines Schraubelementes 24, 25 an dem Deckelelement 12 bzw. dem Antriebsrad 13 befestigt sind.The compensating elements 5 are torsionally rigid in the circumferential direction and arranged in the axial direction between the drive wheel 5 and the left side in the drawing arranged cover member 12 of the stator 9. Here, a positive or cohesive fastening (eg screwing, welding, etc.) is conceivable. For example, a screw connection between compensating element 5 and cover element 12 or drive wheel 13 is shown. For this purpose, the compensating element 5 has at its ends in each case a screw eye 22, 23, which in each case by means of a Screwing 24, 25 are fixed to the lid member 12 and the drive wheel 13.

Das Ausgleichselement 5 ist vorzugsweise aus Federstahl ausgebildet, welcher sich besonders zur Bereitstellung einer flexiblen Verbindung eignet, die einen notwendigen Toleranzausgleich zulässt. Gleichzeitig kann ein Drehmoment sicher spielfrei zwischen dem Antriebsrad 13 und dem Deckelelement 12 übertragen werden.The compensating element 5 is preferably made of spring steel, which is particularly suitable for providing a flexible connection that allows a necessary tolerance compensation. At the same time a torque can be safely transmitted without play between the drive wheel 13 and the lid member 12.

Die Schraubösen 22, 23 des Ausgleichselements 5 sind durch einen Steg 26 verbunden, dessen Form eine Separierung von Antriebsrad 13 und Deckelelement 12 in axialer Richtung erlaubt. Durch diese Separierung von Nockenwellenversteller 4 und Antriebsrad 12 ist eine Entkopplung der Bauteile möglich, so dass eine variable Schnittstelle entsteht, welche bei baugleichem Nockenwellenversteller 4 lediglich eine Anpassung des Ausgleichselementes 5 erfordert. Das gezeigte Ausführungsbeispiel weist einen gestuften Steg 26 auf.The eyelets 22, 23 of the compensating element 5 are connected by a web 26, the shape of which allows separation of the drive wheel 13 and cover element 12 in the axial direction. Through this separation of the camshaft adjuster 4 and the drive wheel 12, a decoupling of the components is possible, so that a variable interface is formed, which only requires an adaptation of the compensation element 5 with identical camshaft adjuster 4. The embodiment shown has a stepped web 26.

Ein weiteres Ausführungsbeispiel der Erfindung ist in den Figuren 2 bis 11 näher dargestellt. Gleiche oder ähnliche Bauteile sind mit dem gleichen Bezugszeichen versehen. Bezüglich der allgemeinen Beschreibung des Aufbaus wird auf die Beschreibung des ersten Ausführungsbeispiels verwiesen.Another embodiment of the invention is in the FIGS. 2 to 11 shown in more detail. The same or similar components are provided with the same reference numerals. With regard to the general description of the construction, reference is made to the description of the first embodiment.

Die Figuren 9 bis 11 zeigen dabei eines der identisch ausgebildeten Ausgleichselemente 5 in vergrößerter Darstellung und teilweise als Schnitt. Es ist ersichtlich, dass das Ausgleichselement 5 einen zur Befestigung am Stator 9 vorgesehenen mittleren Befestigungsabschnitt aufweist, an welchem sich jeweils endseitig ein äußerer Befestigungsabschnitt 28 zur Befestigung am Antriebsrad 13 anschließt. Die Befestigungsabschnitte 27, 28 sind hierdurch vorteilhaft voneinander getrennt, wodurch die Montage wesentlich vereinfacht werden kann.The FIGS. 9 to 11 show one of the identically formed compensation elements 5 in an enlarged view and partly as a section. It can be seen that the compensating element 5 has a middle fastening section provided for attachment to the stator 9, on each of which an outer fastening section 28 for attachment to the drive wheel 13 adjoins. The attachment portions 27, 28 are thereby advantageously separated from each other, whereby the assembly can be substantially simplified.

Zwischen dem mittleren Befestigungsabschnitt 27 und den äußeren Befestigungsabschnitten 28 ist jeweils ein gewellter Zwischenabschnitt 29 vorgesehen, welcher die Möglichkeit bietet, durch Anpassung des Wellenprofils die Flexibilität des Ausgleichselements 5 an die vorgegebenen Eigenschaften eines Nockenwellenverstellers 4 anzupassen.A corrugated intermediate section 29 is provided in each case between the middle fastening section 27 and the outer fastening sections 28, which offers the possibility of adapting the flexibility of the compensating element 5 to the given properties of a camshaft adjuster 4 by adapting the wave profile.

Wie insbesondere aus den Figuren 2, 3 und 6 ersichtlich ist, ist der mittlere Befestigungsabschnitt an dem Deckelelement 12 des Stators 9, der sogenannten Verriegelungsscheibe, befestigt, wobei das Deckelelement 12 zur Anordnung des mittleren Befestigungsabschnitts 27 radial ausgebildete Befestigungsvorsprünge 30 aufweist. Die Befestigungsvorsprünge 30 ermöglichen eine einfache Montage der Ausgleichselemente 5. Dies gilt für die Befestigung der Ausgleichselemente 5 an der Verriegelungsscheibe ebenso wie für die Befestigung an dem hier nicht gezeigten Antriebsrad 13. Die Zwischenabschnitte 29 und die äußere Befestigungsabschnitte überragen die Befestigungsvorsprünge 30 und erstrecken sich nach der Montage am Stator 9 jeweils entgegengesetzt in Umfangsrichtung, was insbesondere aus Figur 6 deutlich hervorgeht.As in particular from the FIGS. 2, 3 and 6 it can be seen, the middle mounting portion is fixed to the lid member 12 of the stator 9, the so-called locking disc, wherein the cover member 12 for mounting the central mounting portion 27 has radially formed fastening projections 30. This applies to the attachment of the compensating elements 5 on the locking disc as well as for attachment to the drive wheel 13, not shown here. The intermediate portions 29 and the outer mounting portions project beyond the mounting projections 30 and extend thereafter the mounting on the stator 9 respectively opposite in the circumferential direction, which in particular from FIG. 6 clearly shows.

Zum Ausgleich der axialen und angularen Toleranzen weist der Nockenwellenversteller 4 des zweiten Ausführungsbeispiels drei in Umfangsrichtung gleichmäßig verteilte Ausgleichselemente 5 auf. Denkbar ist auch die gleichmäßige Anordnung von nur zwei oder von mehr als drei Ausgleichselementen 5. Dabei beeinflusst die Anordnung der Ausgleichselemente 5 den Kraftfluss bei der Drehmomentübertragung.To compensate for the axial and angular tolerances, the camshaft adjuster 4 of the second exemplary embodiment has three compensating elements 5 distributed uniformly in the circumferential direction. It is also conceivable uniform arrangement of only two or more than three compensation elements 5. In this case, the arrangement of the compensation elements 5 influences the power flow in the torque transmission.

Die Befestigungsvorsprünge 30 der Verriegelungsscheibe weisen jeweils zwei Bohrungen 31 zur Befestigung der mittleren Befestigungsabschnitte 27 auf, welche auf einem, in Figur 4 gezeigten ersten Teilkreis K1 um die Mittelachse M des Nockenwellenverstellers 4 angeordnet sind.The fastening projections 30 of the locking disc each have two holes 31 for fastening the central fastening sections 27, which are located on a, in FIG. 4 shown first pitch circle K1 are arranged about the central axis M of the camshaft adjuster 4.

Ebenso weist der mittlere Befestigungsabschnitt 27 jeweils zwei entsprechende Bohrungen 32 zur Befestigung am Deckelelement 12 auf und am äußeren Befestigungsabschnitt 28 ist jeweils eine Bohrung 33 zur Befestigung am Antriebsrad 13 vorgesehen, wobei die Bohrungen 32 des mittleren Befestigungsabschnittes 27 und die Bohrungen 33 der äußeren Befestigungsabschnitte 28 auf einem gemeinsamen, zweiten Teilkreis K2 angeordnet sind, welcher identisch zum ersten Teilkreises K1 ist. Hierdurch kann der Kraftfluss bei der Drehmomentübertragung zwischen Antriebsrad 13 und Stator 9 optimiert werden.Likewise, the middle mounting portion 27 each has two corresponding holes 32 for attachment to the lid member 12 and the outer mounting portion 28 is provided in each case a bore 33 for attachment to the drive wheel 13, wherein the bores 32 of the central mounting portion 27 and the holes 33 of the outer mounting portions 28th are arranged on a common, second pitch circle K2, which is identical to the first pitch circle K1. As a result, the power flow in the torque transmission between the drive wheel 13 and stator 9 can be optimized.

Claims (11)

  1. Camshaft adjuster (4) for a camshaft device (1) having an inner camshaft (2) and having an outer camshaft (3) arranged concentrically with respect to said inner camshaft, wherein the camshaft adjuster (4) has at least one rotor (8), one stator (9) and at least one compensating element (5) for compensating axial and/or radial and/or angular tolerances, and the stator (9) is rotationally conjointly connectable at least indirectly via a drive gear (13) to the outer camshaft (3) and the rotor (8) is rotationally conjointly connectable to the inner camshaft (2), wherein the drive gear (13), as a component separate from the stator (9), is fastenable rotationally conjointly on the outer camshaft (3), and the stator (9) is mountable rotatably on the inner camshaft (2), characterized in that multiple compensating elements (5) are provided, which are preferably provided so as to be arranged in a uniformly distributed manner in a circumferential direction, wherein the compensating elements (5) are designed to be rotationally rigid in the circumferential direction and are provided so as to be arranged and fastened between the stator (9) and the drive gear (13) axially spaced apart from the stator (9), wherein the compensating elements (5) have in each case one central fastening portion (27) which is provided for the fastening to the stator (9) and which is adjoined, at each end side, by an outer fastening portion (28) for the fastening to the drive gear (13).
  2. Camshaft adjuster (4) according to Claim 1, characterized in that the compensating elements (5) are connected in positive locking or cohesive fashion to the stator (9) and to the drive gear (13) .
  3. Camshaft adjuster (4) according to Claim 2, characterized in that the compensating elements (5) are provided so as to be fastened in each case by means of a screw connection to the stator (9) and to the drive gear (13).
  4. Camshaft adjuster (4) according to any of the preceding claims, characterized in that the compensating elements (5) are provided so as to be formed from spring steel.
  5. Camshaft adjuster (4) according to Claim 1, characterized in that in each case one undulating intermediate portion (29) is provided between the central fastening portion (27) and the outer fastening portions (28).
  6. Camshaft adjuster (4) according to Claim 1 or 5, characterized in that the central fastening portion (27) is fastened to a cover element (12) of the stator (9), wherein the cover element (12) has fastening projections (30) formed radially for the arrangement of the central fastening portion (27) .
  7. Camshaft adjuster (4) according to Claim 6, characterized in that the fastening projections (30) have in each case two bores (31) for the fastening of the central fastening portion (27), which bores are arranged on a first pitch circle around the central axis of the camshaft adjuster (4) .
  8. Camshaft adjuster (4) according to Claim 7, characterized in that the central fastening portion (27) has in each case two bores (32) for the fastening to the cover element (12) and, at the outer fastening portion (28), there is provided in each case one bore (33) for the fastening to the drive gear (13), wherein the bores (32) of the central fastening portion (27) and the bores (33) of the outer fastening portions (28) are arranged on a common second pitch circle which is identical to the first pitch circle.
  9. Camshaft adjuster (4) according to any of the preceding claims, characterized in that the rotor (8) is connectable by means of a central screw (15) to the inner camshaft (2).
  10. Camshaft adjuster (4) according to Claim 9, characterized in that the rotor (8) is connectable, with the interposition of an attachment piece (18), by means of the central screw (15) to the inner camshaft (2).
  11. Camshaft device (1) having an inner camshaft (2) and having an outer camshaft (3) which is arranged concentrically with respect to said inner camshaft, having a drive gear (13) fastened on the outer camshaft (3), and having a camshaft adjuster (4) according to the preceding claims.
EP18155989.9A 2017-03-21 2018-02-09 Camshaft device and camshaft adjuster for a camshaft device Active EP3379042B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017105995 2017-03-21
DE102018101972.6A DE102018101972A1 (en) 2017-03-21 2018-01-30 Camshaft adjuster for a camshaft device and camshaft device

Publications (2)

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EP3379042A1 EP3379042A1 (en) 2018-09-26
EP3379042B1 true EP3379042B1 (en) 2019-12-04

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EP18155989.9A Active EP3379042B1 (en) 2017-03-21 2018-02-09 Camshaft device and camshaft adjuster for a camshaft device

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1124966A (en) * 1913-11-12 1915-01-12 Edward P Stack Coupling-link for engines.
US9297281B2 (en) * 2010-04-23 2016-03-29 Borgwarner, Inc. Concentric camshaft phaser flex plate
DE102015200139B4 (en) * 2015-01-08 2021-07-08 Schaeffler Technologies AG & Co. KG Camshaft adjuster connection to a double camshaft
DE102015113356A1 (en) * 2015-08-13 2017-02-16 Thyssenkrupp Ag Adjustable camshaft with a phase plate

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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