DE202013012767U1 - Camshaft adjuster with a spring retainer and a return spring - Google Patents

Abstract

Camshaft adjuster (1) for an internal combustion engine, having a stator and a driven-side rotor (2) which is rotatably mounted in the stator for achieving an adjustment of a rotatably attachable to it camshaft, and a spring receptacle (3) on an end face (4) of the rotor (2) is arranged, wherein the spring receptacle (3) by means of a spring element (5) relative to the stator in the direction of rotation prestressed and axially held on a rotor-side member in a holding position, wherein the spring element (5) with the spring receptacle (3 ) cooperates, that the spring receptacle (3) by means of the biasing force of the spring element (5) is screwed into the holding position, and wherein the spring receptacle (3) is held in the holding position by means of at least a first bayonet-type holder at least in the axial direction.

Description

Field of the invention

The invention relates to a camshaft adjuster for an internal combustion engine, having a stator and a driven-side rotor which is rotatably mounted in the stator to achieve an adjustment of a rotatably attachable to it camshaft, and a spring receptacle which is arranged on an end side of the rotor, wherein the spring receptacle by means of a spring element, such as a return spring, relative to the stator in the direction of rotation biased and held axially on a rotor-side member in a holding position.

Camshaft adjusters are used in internal combustion engines, in particular internal combustion engines, for varying the timing of the combustion chamber valves in order to make the phase relation between a crankshaft and a camshaft in a defined angular range, between a maximum early and a maximum late position, variable. Adjusting the timing to the current load and speed reduces fuel consumption and emissions. For this purpose, camshaft adjuster are integrated into a drive train, via which a torque is transmitted from the crankshaft to the camshaft. This drive train may be formed for example as a belt, chain or gear drive.

In the case of a hydraulic camshaft adjuster, the stator arranged on the drive side and connectable to a drive wheel, which can also be designed as a housing, and the rotor arranged on the output side and connectable to a camshaft form one or more pairs of pressure chambers acting against one another which can be acted on by hydraulic means. The stator and the rotor are arranged coaxially. By filling and emptying individual pressure chambers, a relative movement between the housing and the rotor is generated. The rotationally acting between the stator and the rotor spring urges the stator relative to the rotor in an advantageous direction. This advantage direction can be the same or opposite to the direction of rotation.

A preferred type of hydraulic phaser is the vane phaser. The Flügelzellenversteller has a housing designed as a stator, the rotor and a rotatably connected to the stator or integrally formed with this drive wheel with an external toothing. The rotor is usually formed rotatably connected to the camshaft. The rotor is coaxial with the stator and located inside the stator. The rotor and the stator are characterized by their, radially extending wings, oppositely acting oil chambers, which are acted upon by oil pressure and allow relative rotation between the stator and the rotor. The wings are either integrally formed with the rotor or the stator or angeord net as "inserted wings" in designated grooves of the rotor or the stator.

For an exact timing control, it is important in these camshaft adjuster systems to ensure a direct and precise connection of the prestressing between the stator and the rotor effecting biasing mechanism. In order to achieve the intended for the respective load range rotational adjustment of the usually designed as a spring element biasing mechanism by a fixed angle permanently, high demands are placed on the connection of the biasing mechanisms on the stator and the spring receiver, but also to the connection between the spring receiver and the rotor ,

Known prior art discloses different spring connections, e.g. via pins in the rotor or in the spring receptacle, in which the spring element / the spring must be additionally secured by other elements (spring cover, dowel pins, etc.) against axial jump off.

From the WO 2009/027167 A1 is a Steuerzeitenstellvorrichtung for an internal combustion engine is known, which serves as such to adjust the phase position of the valve actuating portion of a valve train, in particular a camshaft, with respect to a power train upstream in the power train section. To comply with the circumferential positions between the spring retainer and the rotor in the narrowest possible range of tolerance, in a manner advantageous from a manufacturing point of view, reliably proposes the WO 2009/027167 A1 form a pawl-like anchoring structure between the spring receiver and the rotor in order to collapse these two components together in the axial direction at the beginning of the assembly.

Also the DE 10 2011 082 590 A1 deals with an axial securing of the spring receiver. The DE 10 2011 082 590 A1 discloses a camshaft adjuster whose spring retainer for fixing in the axial direction has radial tabs which engage in a groove of a housing-side cover element and further, for determining the angular position between the spring retainer and the camshaft, having orientation means. For receiving the orientation means and the tabs, the spring receptacle on a separate disk-shaped adapter part, wherein the orientation means pressed in the form of elevations in the adapter part and the radial tabs are punched out. The adapter part is on a trigger wheel in to attach a separate step to form the spring retainer. This embodiment of a camshaft adjuster has the disadvantage that the spring receptacle used is relatively expensive to manufacture. Separate punching and embossing operations on the adapter part are to be carried out before the adapter part is connected to the trigger wheel in a further working step. In addition, the handling of the spring receptacle is difficult during assembly by the adapter part. In particular, during the assembly of, the stator relative to the rotor biasing spring element on the spring receiving increased caution. Due to the radial tabs on the adapter part, the usually snail-shaped spring elements can not be easily pushed onto the spring seat in the axial direction. The spring element is clever and expensive lever over lever over these radial tabs, which affects the assembly costs unfavorable. It may sometimes even happen that the spring element is bent or damaged inadvertently, which in turn can have a negative impact on the life of the camshaft adjuster. If the spring element, alternatively, applied to the trigger wheel before connecting the adapter part with the trigger wheel, the assembly effort is relatively high in this case, since reinforced precautions must be taken during the connection of the trigger wheel with the adapter part, so that the spring element is not releases again from the trigger wheel. Even in a mounted state of the camshaft adjuster, in which the spring receptacle is connected to the cover element, it can, in particular during transport of the camshaft adjuster, such as the transport to the final assembly location, where the camshaft adjuster is fixedly mounted with a camshaft of an internal combustion engine, due to the loads during the Transport for releasing the connection between the cover element and spring receiving come. The DE 10 2010 015 175 A1 and the DE 10 2010 015 176 A1 reveal more spring recordings.

Disclosure of the invention

The present invention is therefore based on the object to provide a captive for a spring receptacle of a camshaft adjuster available that can withstand strong transport influences. Furthermore, the disadvantages of the prior art should be avoided. Additional effort in the production and additional costs through additional components should be avoided and their assembly / disassembly be simplified. The known spring connection systems on camshaft adjusters are to be simplified in order to reduce system costs.

This object is achieved in that the spring element cooperates with the spring receptacle, that the spring receptacle is screwed by means of the biasing force of the spring element in the holding position.

By this screwing the spring retainer in the holding position in which the spring retainer is held axially, the mechanical property of the spring element for the position assurance of the assembled components is advantageously utilized. The spring element causes a captive connection of the spring receiver to the rotor-side component, such as the rotor or a stator-fixed component, e.g. a seal cover element. The spring element is always in the holding position in a prestressed state, which is why, first of all, a sufficiently high counterforce would have to be applied in an opposite direction of rotation of the spring receiver in order to unscrew the spring receiver after assembly from the holding position and to pull it out of the rotor-side component in the axial direction or to be solved by this. This biasing force is carried out sufficiently high, whereby the spring retainer is always safely supported even at high acting forces, such as during transport, on the rotor-side component. Thus, a reliable captive is guaranteed during transport of the camshaft adjuster. Furthermore, can be produced by this holder a cost-producing captive. Only a few work steps have to be performed on the spring receiver and a rotor-side component in order to produce the biasing unit.

The spring receptacle is held in the holding position by means of at least one first bayonet-type holder at least in the axial direction. A bayonet-type mount is inexpensive to produce, since it only requires two elements that are pushed past each other in the axial direction and are then folded one behind the other. Also, such a bayonet-like holder is optimally aligned with the commonly used spring elements, such as coil springs, as these spring elements can secure the bayonet-like closure against opening.

Further advantageous embodiments are claimed in the subclaims and are explained in more detail below.

Furthermore, it is advantageous that on the spring receiving a first holding portion of the first holder is formed, which engages behind a arranged on a statorfesten component or on the rotor, the second holding portion of the first holder in the axial direction. As a result, the bayonet-type holder is particularly easy to implement.

Preferably, the first holding portion of the first holder is designed as a, in a lateral surface of the spring receiving introduced first recess, first groove, first window or first recess. The lateral surface, to which usually the spring element, such as a coil spring, is pushed concentrically, would then have no obstacles located in the displacement of the spring element over which the spring element would have to be lifted / levered over before reaching the intended mounting position. In addition, depressions, grooves, windows or recesses are inexpensive to produce in practice, which, for example, could be punched or milled easily in spring mounts made of sheet metal.

If, according to a further advantageous embodiment, the second holding portion of the first holder is designed as a first projection connected to the stator-fixed component, wherein the first projection extends radially inwardly from an inner circumferential surface of the stator-fixed component, then an easily realized male counter-contour of FIG Bayonet closure realized that could interact with a female contour, such as the recess, the groove, the window or the recess of the spring retainer. If, for example, this stator-fixed component would be a sealing cover connected to the stator, this could be produced in a simple manner from a stamped sheet in a few steps.

It is furthermore advantageous if the rotor has a stop lug against which a stop projection connected to the spring receiver is mounted or pressed against rotation in the circumferential direction of the rotor, and / or the stop lug delimits a rotation of the spring receiver caused by the bias of the spring element. As a result, a defined stop would be provided, which supports the spring receptacle at a defined position against the biasing force of the spring when the spring receptacle is screwed into the holding position.

A further advantageous embodiment can be realized in that the spring receptacle is held axially in the holding position by means of at least one further, second bayonet-type holder, which second holder in the circumferential direction to the first holder by an angle greater than 120 ° and less than 180 °, preferably offset by 170 ° , is arranged. The second holder would then be able to achieve an additional support between the spring receiver and the rotor-side component at an additional point on the circumference of the camshaft adjuster. This in turn would then reduce the risk of tilting of the spring receiver relative to the rotor-side component, such as the stator-fixed component or the rotor. In addition to the special angular offset of 170 °, a helpful assembly support would be implemented. At this angle, the bayonet-type bracket is designed according to Poka Yoke, which ensures that the components - spring seat and Rotorseitges component - are positioned and mounted in the position intended by the designer to each other.

It is advantageous in this context, if on the spring receiving a first holding portion of the second holder is formed, which engages behind a second, arranged on a statorfesten component or a rotor holding portion of the second holder in the axial direction, and / or the first holding portion of second holder is designed as a introduced into a lateral surface of the spring receiving, second recess and / or the second holding portion of the second holder is designed as a connected to the statorfesten component second projection, wherein the second projection extends radially from an inner circumferential surface of the statorfesten component extends inside. Thus, the second holder would be optimally designed for use as a bayonet lock and inexpensive to produce.

A further advantageous embodiment provides that the first and second indentations each have a first side flank which adjoins them in a circumferential direction and extends in the radial direction, wherein the first side flank of the first recess in the circumferential direction of the spring receptacle to the first side flank of the second recess, with respect ., The axis of rotation about which the spring receptacle is rotatably mounted, offset by an angle greater than 120 ° and less than 180 °, preferably offset by 170 °, is arranged. Thus, the assembly-safe design according to Poka Yoke can be implemented in a simple manner, which is already visible from the outside for the fitter, by the position of the two wells, how to align the spring receptacle relative to the rotor-side component correctly.

A further advantageous embodiment provides that the spring receptacle is designed as a trigger wheel, which is designed to cooperate with a sensor. As a result, a spring receptacle configured substantially cup-shaped, for example, can be used in a cost-effective manner simultaneously as a receptacle for an element interacting with a sensor, for which reason the number of components is additionally reduced.

In other words, a camshaft adjuster is realized by the subject invention, which provides an alternative connection and securing a spring on the rotor for generating a required (supporting) restoring torque available. By the Camshaft adjuster according to the invention, it is possible to simplify / further develop the existing spring connection concepts to the camshaft adjuster to reduce system costs. The spring retainer and the rotor are thereby modified by additional undercuts are created, which secure the spring element / the spring over the spring preload frictional / positive axially against a jump (bayonet-type closure / bayonet lock). The construction is essentially characterized by the spring receptacle, which is preferably made of sheet metal and has webs on which undercuts on both sides (inside or outside) are introduced. Corresponding grooves or lugs on the rotor for connecting the spring receiver are provided. In the assembly process, first, the spring element, such as a coil spring, received via a positive connection (eg square) on the spring receiver and biased by turning the spring retainer. About the webs or recesses on the spring receiving the biased assembly angle-oriented (Poka Yoke) is added via the groove or lugs in the rotor and axially stripped. The prestressed spring rotates the spring receiver with the webs or recesses against the groove or lugs and the circumferential oil groove on the rotor. By the biasing force of the spring, the spring is held over the respective undercuts in the rotor and thus secured the spring against axial jump off (bayonet use). The spring receptacle can be used universally for both directions of rotation of the spring by the undercuts introduced on both sides of the webs or the selected counter contour in the rotor (intake / exhaust camshaft adjuster).

The invention will now be described by way of example with reference to the accompanying drawings based on preferred embodiments.

• 1 eine isometrische Darstellung eines erfindungsgemäßen Nockenwellenverstellers in einer ersten Ausführungsform, wobei die Federaufnahme bereits mit dem Federelement verbunden ist sowie relativ zu einem statorfesten Bauteil vorgespannt ist, jedoch noch nicht rotorseitig axial eingeschoben ist,
• 2 eine Schnittansicht des erfindungsgemäßen Nockenwellenverstellers nach 1, welcher Schnitt als Längsschnitt entlang der Drehachse des Nockenwellenverstellers durchgeführt ist und detailliert eine erste Halterung zwischen der Federaufnahme und dem Rotor darstellt, wobei die Federaufnahme rotorseitig in den Rotor eingeschoben ist, aber noch nicht in die Haltestellung eingedreht ist.
• 3 eine isometrische Darstellung des in den 1 und 2 dargestellten Nockenwellenverstellers, wobei die Federaufnahme in der Haltestellung gezeigt ist, in der das Federelement die Federaufnahme in Umfangsrichtung gegen den Rotor drückt,
• 4 eine Darstellung eines Längsschnittes von dem in der 3 dargestellten Nockenwellenversteller, wobei detailliert die Lage der Federaufnahme in dem Rotor in der Haltestellung dargestellt ist,
• 5 eine isometrische Darstellung der in dem Nockenwellenversteller nach 1 bis 4 verwendeten Federaufnahme, wobei eine im montierten Zustand dem Rotor zugewandte Seite der Federaufnahme sichtbar ist,
• 6 einen Rotor in isometrischer Darstellung, der in dem Nockenwellenversteller nach den 1 bis 4 verbaut ist, wobei dieser Rotor von einer Seite dargestellt ist, die im montierten Zustand des Nockenwellenverstellers der Federaufnahme zugewandt ist,
• 7 eine isometrische Darstellung eines Zusammenbaus zwischen einer Federaufnahme und einem an einem statorfesten Bauteil gehaltenen Federelement, wobei der Federaufnahme-Federelement-Zusammenbau in dem Nockenwellenversteller nach den 1 bis 4 eingebaut ist,
• 8 einen Nockenwellenversteller gemäß einer zweiten Ausführungsform, der in einem gemäß 2 durchgeführten Längsschnitt, in einem eingeschobenen Zustand der Federaufnahme, dargestellt ist, wobei die Federaufnahme in axialer Richtung in den Rotor eingeschoben ist, jedoch noch nicht mittels des Federelementes in Umfangsrichtung gegen den Rotor gedrückt ist,
• 9 eine Schnittdarstellung gemäß 8, in der die Federaufnahme in der Haltestellung dargestellt ist, in der die Federaufnahme aufgrund der durch das Federelement wirkenden Federkraft in Umfangsrichtung gegen den Rotor gedrückt ist,
• 10 eine isometrische Darstellung der in dem Nockenwellenversteller nach den 8 und 9 verwendeten Federaufnahme, die von der Seite dargestellt ist, die im montierten Zustand des Nockenwellenverstellers dem Rotor zugewandt ist,
• 11 eine Detailansicht der in den Rotor eingreifenden Kontur der Federaufnahme nach 10,
• 12 eine isometrische Darstellung eines in dem Nockenwellenversteller nach den 8 und 9 montierten Rotors, der von der Seite dargestellt ist, die im montierten Zustand des Nockenwellenverstellers der Federaufnahme zugewandt ist,
• 13 eine Detailansicht des in 12 abgebildeten Rotors im Bereich der Drehachse,
• 14 eine isometrische Ansicht einer Federaufnahme, die in einem Nockenwellenversteller gemäß einer weiteren, dritten Ausführungsform montierbar ist, wobei die Federaufnahme von einer Seite dargestellt ist, die im montierten Zustand des Nockenwellenverstellers dem Rotor zugewandt ist,
• 15 eine Seitenansicht der in 14 dargestellten Federaufnahme in einer Ebene parallel zur Drehachse des Nockenwellenverstellers, wobei zwei in die Federaufnahme eingearbeiteten Vertiefungen erkennbar sind,
• 16 eine isometrische Darstellung eines in dem Ausführungsbeispiel verbauten Rotors, in dem auch die Federaufnahme aus 14 und 15 verbaut ist, wobei der Rotor von einer Seite dargestellt ist, die im montierten Zustand des Nockenwellenverstellers der Federaufnahme zugewandt ist,
• 17 eine isometrische Darstellung eines im montierten Zustand statorfest verbundenen Dichtungsdeckels, der in dem Nockenwellenversteller verbaut ist, in dem auch die in den 14 bis 16 dargestellte Federaufnahme und Rotor verbaut ist,
• 18 eine alternative Ausführungsform zu dem in 17 dargestellten Dichtungsdeckel,
• 19 eine Schnittdarstellung durch einen Nockenwellenversteller der dritten Ausführungsform, in der auch die in 14 bis 18 dargestellte Federaufnahme, der Rotor und der Dichtungsdeckel verbaut sind, wobei der Nockenwellenversteller in einem senkrecht zur Drehachse durchgeführten Querschnitt dargestellt ist, welcher Schnitt den eingeschobenen Zustand der Federaufnahme hinter dem Dichtungsdeckel sowie in dem Rotor darstellt,
• 20 eine Schnittdarstellung gemäß 19, in der die Federaufnahme in der Haltestellung dargestellt ist und die durch das Federelement wirkende Vorspannkraft die Federaufnahme gegen den Rotor drückt, und
• 21 eine isometrische Darstellung eines Nockenwellenverstellers gemäß den 19 und 20, in dem die Federaufnahme nochmals in der Haltestellung dargestellt ist, in der sie den Federdeckel hintergreift und in Umfangsrichtung an dem Rotor anliegt.

It shows:

• 1 an isometric view of a camshaft adjuster according to the invention in a first embodiment, wherein the spring receptacle is already connected to the spring element and is biased relative to a statorfesten component, but is not yet inserted axially on the rotor side,
• 2 a sectional view of the camshaft adjuster according to the invention 1 which section is performed as a longitudinal section along the axis of rotation of the camshaft adjuster and illustrates in detail a first holder between the spring receiver and the rotor, wherein the spring receiver is inserted into the rotor on the rotor side, but has not yet been screwed into the holding position.
• 3 an isometric representation of the in the 1 and 2 shown camshaft adjuster, wherein the spring receptacle is shown in the holding position, in which the spring element presses the spring receptacle in the circumferential direction against the rotor,
• 4 a representation of a longitudinal section of the in the 3 illustrated camshaft adjuster, wherein in detail the position of the spring receiver in the rotor is shown in the holding position,
• 5 an isometric view of the in the camshaft adjuster after 1 to 4 used spring receptacle, wherein in the mounted state facing the rotor side of the spring receptacle is visible,
• 6 a rotor in isometric view, in the camshaft adjuster after the 1 to 4 is installed, this rotor is shown from one side, in the assembled state the camshaft adjuster faces the spring receiver,
• 7 an isometric view of an assembly between a spring retainer and a spring element held on a statorfesten member, wherein the spring receiving spring element assembly in the camshaft adjuster after the 1 to 4 is installed,
• 8th a phaser according to a second embodiment, which in a according 2 longitudinal section, shown in an inserted state of the spring receiver, is shown, wherein the spring retainer is inserted in the axial direction in the rotor, but not yet pressed by means of the spring element in the circumferential direction against the rotor,
• 9 a sectional view according to 8th in which the spring receptacle is shown in the holding position, in which the spring receptacle is pressed against the rotor in the circumferential direction due to the spring force acting through the spring element,
• 10 an isometric view of the in the phaser after the 8th and 9 used spring seat, which is shown from the side facing the rotor in the assembled state of the camshaft adjuster,
• 11 a detailed view of the engaging in the rotor contour of the spring receiving 10 .
• 12 an isometric view of one in the phaser after the 8th and 9 mounted rotor, which is shown from the side, which faces in the assembled state of the camshaft adjuster spring receiving,
• 13 a detailed view of the in 12 imaged rotor in the region of the axis of rotation,
• 14 an isometric view of a spring receiver which is mountable in a camshaft adjuster according to a further, third embodiment, wherein the spring receiver is shown from a side facing the rotor in the assembled state of the camshaft adjuster,
• 15 a side view of in 14 illustrated spring receptacle in a plane parallel to the axis of rotation of the camshaft adjuster, wherein two incorporated into the spring receiving recesses are recognizable,
• 16 an isometric view of a built-in rotor in the embodiment, in which also the spring receptacle 14 and 15 is installed, wherein the rotor is shown from one side, which faces in the assembled state of the camshaft adjuster of the spring retainer,
• 17 an isometric view of a statorfest connected in the assembled state seal cover, which is installed in the camshaft adjuster, in which also in the 14 to 16 shown spring receptacle and rotor is installed,
• 18 an alternative embodiment to that in 17 illustrated seal cover,
• 19 a sectional view through a phaser of the third embodiment, in which also the in 14 to 18 shown spring retainer, the rotor and the seal cover are installed, wherein the camshaft adjuster is shown in a cross-section perpendicular to the axis of rotation, which section represents the inserted state of the spring retainer behind the seal cover and in the rotor,
• 20 a sectional view according to 19 in which the spring receptacle is shown in the holding position and the biasing force acting by the spring element presses the spring retainer against the rotor, and
• 21 an isometric view of a camshaft adjuster according to the 19 and 20 , in which the spring receptacle is again shown in the holding position in which it engages behind the spring cover and rests in the circumferential direction on the rotor.

The illustrated embodiments are merely schematic in nature and are only for understanding the invention. Identical components are provided with the same reference numerals.

1 shows a first embodiment of a camshaft adjuster according to the invention 1 , The camshaft adjuster 1 is designed as Flügelzellenversteller. The camshaft adjuster 1 is optimized for use in internal combustion engines. It can be used in various internal combustion engines to control the timing of the respective internal combustion engine. Usually, this internal combustion engine is designed as a diesel or gasoline engine. The camshaft adjuster 1 is designed in particular in its dimension so that it can be used in the internal combustion engines of cars and / or trucks.

The camshaft adjuster 1 has a stator not shown here in detail and a driven-side rotor 2 on. The rotor 2 is rotatably mounted in the stator to achieve an adjustment of a rotationally fixed, not shown here, attachable to it camshaft. Also, the camshaft adjuster points 1 a spring receiver 3 on which spring retainer 3 on a front side 4 / spring side end 4 is arranged, wherein the spring receptacle 3 by means of a spring element 5 can be prestressed in the direction of rotation relative to the stator.

The camshaft adjuster 1 is in 1 shown in a state in which the spring retainer 3 not yet completely in the axial direction in the rotor 2 is inserted. The spring recording 3 is in this decoupled state by its rotor-facing contact surface 6 ( 5 ) from the front 4 of the rotor 2 spaced.

The stator is largely not shown in detail in this embodiment, since the stator of the camshaft adjuster 1 in a known manner according to a stator / drive element of the prior art of DE 10 2011 082 590 A1 is configured, which stator in a known manner around the rotor 2 , a plurality of wing cell-like pressure chambers forming, is arranged around and is connected to drive means of the internal combustion engine. Stator, rotor 2 and spring retainer 3 are concentric about a common axis of rotation 8th arranged around the the phaser 1 rotates during operation and preferably in a motor-mounted state of the camshaft adjuster 1 is aligned coaxially to a rotational axis of a camshaft.

In the embodiment according to 1 is only a statorfester retaining bolt 7 (described in detail below), which is fixedly connected to the stator stator side and one end of the spring element 5 holds tight. The spring element 5 is also here in a known manner as a spiral Spring / spiral spring 5 executed, which is preferably made of a spring steel, and adjacent to a first end, with the retaining bolt 7 is connected, having a second end, with the spring receiving 3 connected is.

The spring recording 3 is particularly vivid in 5 shown which 5 the spring receiver 3 from one of the in 1 facing contact surface 6 represents. The contact surface 6 is about the axis of rotation 8th formed around and extends substantially radially outward. To the axis of rotation 8th remote, radially outer side of the contact surface 6 includes a substantially extending in the axial direction of the lateral surface 9 on. At the periphery of the lateral surface 9 is the spring element 5 held in the region of its second end by a positive connection. The axis of rotation 8th facing inside of the spring element 5 is preferably designed geometrically such that the inside is held directly form-fitting manner on the lateral surface. The lateral surface 9 is formed with respect to its circumference substantially rectangular / square running, to which extent the spring element 5 in an assembled state of the spring element 5 on the spring receiver 3 ( 7 ) is present. The torsion-proof connection of the second end of the spring element 5 takes place, therefore, by the positive engagement between the axis of rotation 8th facing inside of the spring element 5 along this quadrangular contact surface / lateral surface 9 the spring recording 3 ,

As in the 2 to 4 is shown particularly clearly, is the spring receptacle 3 by means of a bayonet-type holding system on the rotor 2 appropriate. There are two bayonet mountings 11 and 18 arranged distributed in the circumferential direction. Each of these brackets 11 and 18 consists of two interacting holding sections 10 and 12 / 22 and 23 together, of which a first holding section 10 / 22 with the spring holder 3 is connected and a second holding portion in the rotor 2 is introduced. The first holding section 10 the first holder 11 is on the part of the contact surface 6 the spring recording 3 arranged and extends in the axial direction of the contact surface 6 path. This first holding section 10 is designed so that it has a second, on the rotor 2 arranged holding section 12 the first holder 11 , in the assembled state of the camshaft adjuster 1 , engages behind in the axial direction. The first holding section 10 runs axially from the contact surface 6 out to one side, the outside surface 9 turned away.

The first holding section 10 extends substantially T-shaped from the first bearing surface 6 path. The center bar / longitudinal bar 20 of the Ts is here on the contact surface 6 Tailored and integrally formed on these, while the transverse to this central bar 20 extending crosspiece 14 of Ts on the side of the central pier 20 adjacent, which faces away from the contact surface. The central pier 20 of the Ts extends in the axial direction to the transverse web 14 towards, and has, mutatis mutandis, a radial width which is smaller than the radial width of the transverse web 14 that is from the middlebridge 20 extends to the left and right. Through this crosspiece 14 are thus between him and the contact surface 6 two undercuts 13 formed with the second holding section 12 of the rotor 2 interact. The first holding section 10 is extending in its width in the circumferential direction.

The undercuts 13 of the first holding section are in the mounted state ( 4 ), in a holding position with a corresponding second holding section 12 brought into or spaced from this. The second holding section 12 , such as in 6 is clearly visible, is in a through hole of the rotor 2 arranged and as one with an opening 16 provided groove 15 formed. The groove 15 extends along the inside of the through hole, in the circumferential direction with respect to the axis of rotation 8th , The groove 15 has the opening 16 on, in the axial direction, in the direction of the spring retainer 3 , to the groove 15 connects and the groove 15 in the axial direction of the first holding portion 10 accessible. In the opening 16 is in the retracted state of the spring retainer 3 , according to 2 , the first holding section 10 inserted. In this state, ie a position in which the spring retainer 3 by means of their contact surface 6 at the front 4 of the rotor 2 is applied, is the crossbar 14 of the first holding section 10 in the groove 15 located, with the undercut 13 axially at the height of the opening 16 is located.

In the retracted position, the spring receiver 3 then released during assembly, whereupon they due to the biasing force of the spring element 5 in the direction of action of the spring element 5 relative to the rotor 2 twisted and pressed into the holding position. In the stop position, the center bar touches 20 with one side a substantially axially extending side edge of the opening 16 , Depending on the effect of the spring force, either the left or the right undercut will be used 13 against an opposite side edge of the opening 16 pressed. The undercuts 13 have a sufficient axial length to the side edges of the opening 16 between the crossbar 14 and the contact surface 6 take.

The interaction between this first holding section 10 and the second holding portion 12 represents the first holder 11 dar. The second holder 18 the spring recording 3 is circumferentially offset from the first holder 11 arranged. Thus, the spring receptacle 3 another, first holding section 17 on the corresponding to the first holding portion of the first holder 11 is constructed and the same shape and connection to the contact surface 6 having. The first holding section 10 the first holder 11 is preferably with respect to the circumference not exactly the first holding portion 17 the second bracket 18 arranged opposite, that is not exactly offset by 180 ° to this arranged about the axis of rotation, but preferably by an angle less than 180 ° and greater than 120 °. Preferably, this offset angle should be 170 °. Thus, also the first holder 11 to the second holder 18 arranged offset by exactly this angular offset. Also the first holding section 17 the second bracket 18 engages in the assembled state of the camshaft adjuster 1 , ie in the holding position, one equal to the second holding section 12 the first holder 11 executed second holding section 19 the second bracket 18 in the axial direction. When twisting by the spring force / biasing force of the spring element 5 will also be the second holding section 19 the second bracket 18 with the first holding section 17 the second bracket 18 brought into connection and thus connected behind in the axial direction.

Preferably, the groove 15 a part of the groove of an oil distribution passage of the camshaft adjuster 1 ,

Also in 4 is this engaging state / the holding position of the first holding section 10 . 17 in the second holding section 12 . 19 illustrated.

In the 8th to 13 is another, to the camshaft adjuster 1 the 1 to 7 alternative embodiment of another camshaft adjuster 21 shown. The camshaft adjuster 21 is largely the same as the camshaft adjuster 1 the 1 to 7 executed. The only differences between the camshaft adjusters 1 and 21 is only the configuration of the first and second brackets 11 and 18 ,

According to this second embodiment, as particularly illustrative in the 8th and 9 shown, shows the spring receptacle 3 that with the spring element 5 is connected and otherwise has the same geometric extension, rather than a substantially T-shaped first holding portion 10 . 17 two substantially L-shaped configured holding section parts 22 . 23 , The first holding section 10 the first holder 11 has two holding section parts 22 and 23 on and also the first holding section 17 the second bracket 18 has two holding section parts 22 and 23 on. The first holding section part 22 and the second holding portion part 23 also extend in the axial direction of the contact surface 6 the spring recording 3 path. Both the first and the second holding section 22 and 23 have the substantially L-shaped extension, wherein the longitudinal web extending in the axial direction 20 of the Ls directly to the contact surface 6 is formed and the transverse web extending transversely to the longitudinal web 14 of the Ls at the contact surface 6 opposite side of the Ls connects. The first and second holding sections 22 and 23 also extend in their width in the circumferential direction of the spring receiver 3 , The two L-shaped first and second holding sections 22 and 23 are not the same along the circumferential direction, but oppositely oriented, ie that the cross bar 14 the first holding section part 22 of the first holding section 10 to the other crossbar 14 the second holding portion part 23 of the first holding section 10 extends and therefore also the crossbar 14 the second holding portion part 23 of the second holding section 12 to the crossbar 14 the first holding section part 22 of the second holding section 12 extends. As a result, the through the L-shaped holding portion parts 22 and 23 between the crossbars 14 and the contact surface 6 formed undercuts 13 facing each other while still facing away from each other in the first embodiment.

Between these undercuts 13 act one of these two holding section parts 22 and 23 with a second holding section 19 together, which second holding section 19 on the rotor 2 is formed. The rotor 2 is also according to the second embodiment with a groove 24 Running over two openings 25 and 26 ie a first opening 25 and a second opening 26 in the axial direction, the groove 24 uncover. The spring recording 3 is doing so in the inserted state in these two openings in the groove 24 inserted that the first holding section part 22 through the first opening 25 axially in the groove 24 protrudes and the second holding portion part 23 in the second opening 26 in the groove 24 protrudes. Between the openings 25 and 26 is formed a projection which extends in the axial direction so that it in the two undercuts 13 upon rotation of the spring receiver 3 can be inserted. In 9 is this inserted position of the spring receiver 3 by means of her first holding section 10 in the second holding section 12 illustrated. The first holding section 10 and the second holding section 12 are the same as the first holding section 17 and the second holding section 19 educated. Also the first holding section 17 the second bracket 18 has the same shape as the first holding section 10 the first holder 11 is also at an angle smaller than 180 ° and greater than 120 °, preferably 170 ° in the circumferential direction to the first holding portion 10 the first holder 11 added. Also the 12 and 13 illustrate the groove again 24 in the rotor 2 , where the groove 24 preferably along the entire inner circumference of the rotor 2 runs and two openings 25 and 26 having, wherein the first opening 25 both the first opening 25 for the first holding section 10 represents as well as the first opening 25 for the second holding section 19 , Also the second opening 26 is at the same time the second opening 26 both for the first and the second holder 11 and 18 ,

In the 14 to 21 is a third advantageous embodiment of the camshaft adjuster according to the invention 1 shown. The connection of the spring receiver 3 this further camshaft adjuster, below with reference numerals 31 provided, as well as the configuration of the stator essentially corresponds to the connection of the spring receiver 3 the other two embodiments and is not described in detail here.

In contrast to the previously described embodiments are on the spring retainer 3 However, this third embodiment, not in the axial direction of the contact surface 6 to the side of the rotor 2 protruding first and second holding sections 10 and 17 used. These holding sections 10 and 17 are in the third embodiment as bulges 32 and 36 executed. As in the 14 and 15 is a first bulge 32 on the lateral surface 9 the spring recording 3 formed, which first bulge 32 in the radial direction outwards from the lateral surface 32 extends. This first bulge 32 is divided into two parts, which divides through a window 33 / first window 33 (first recess, first recess, first groove) is configured. This first window 33 extends with its longitudinal direction in the circumferential direction of the spring receiver 3 and shares that as the first holding section 10 the first holder 11 executed first bulge 32 in two parts. In the direction of the contact surface 6 shows the first window 33 a radial tab 34 / first radial tab 34 on. This first radial tab 34 extends like the first bulge 32 in the radial direction of the lateral surface 9 out to the outside. At the first radial tab 34 opposite side of the first bulge 32 is a spring receiving area 35 running, the inside of the spring element 5 at least in the assembled state of the camshaft adjuster 31 positively holds.

Also the second bulge 36 in the circumferential direction on the lateral surface 9 offset to the first bulge 32 is arranged according to this first bulge 32 formed and also has a window 37 , a second window 37 (second recess, second recess, second groove). Thus, also to the side of the contact surface 6 towards this second window 37 then a radial tab 38 / second radial tab 38 formed, which is also in the radial direction of the lateral surface 9 extends out. Also the second bulge 36 forms the first holding section 17 the second bracket 18 , At the second radial tab 38 opposite side of the first bulge 32 is also a spring receiving area 35 running, the inside of the spring element 5 at least in the assembled state of the camshaft adjuster 31 positively holds.

In 17 and in 18 is still a statorfest mounted seal cover 39 illustrated in the assembled state of the camshaft adjuster 31 firmly connected to the stator and to the side of the axis of rotation 8th has a through hole. On the inner peripheral surface of this through hole of this seal cover 39 is a lead 40 to the seal cover 39 then, which is radially inward, in the direction of the axis of rotation 8th , extends. The lead 40 , below as a first advantage 40 is part of the second holding section 12 a first bracket 11 , In addition, the seal cover 39 another advantage 41 on, the second holding section 19 the second bracket 18 represents. Also the second lead 41 is radially inwardly extending to the inner peripheral surface of the through hole of the seal cover 39 formed. The first advantage 40 and the second projection 41 can together extend almost to the entire inner circumference of the seal cover, as in 17 is shown. Alternatively, they may be short in length and extend circumferentially over only a short portion of the inner circumference as seen in FIG 18 is illustrated.

In 19 is illustrated as the axial receptacle of the spring retainer 3 , here behind the seal cover 39 , is working. The first and second bulge 32 and 36 be so in the axial direction of the two projections 40 and 41 between the spring receptacle 3 and rotor 2 placed seal cover 39 pushed past that two radial tabs 34 and 38 in the inserted state, ie when contact of the contact surface 6 with the seal cover 39 , the seal cover 39 to the side of the rotor 2 penetrate. The two radial tabs 34 and 38 are in the inserted state in their axial position in a Stirnnut 42 of the rotor 2 placed. In this inserted state, then the spring seat 3 be released, causing the spring retainer relative, according to 20 and 21 to the seal cover and the rotor 2 twisted and thus the holding position is achieved.

In this stop position of the camshaft adjuster 31 engage behind the two radial tabs 34 and 38 the projections 40 and 41 the seal cover 39 , Thus, the spring receiver 3 in this assembled state before an axial Moving through the system of radial tabs 34 and 38 at the projections 40 and 41 prevented.

In this mounted position of the camshaft adjuster 31 in which the radial tabs 34 and 38 the spring recording 3 the projections 40 and 41 the seal cover 39 engage behind each of the radial tabs 34 and 38 each at a stop nose 43 and 44 on the rotor 2 on. The first stop nose 43 acts with the first radial tab 34 of the first holding section 10 the first holder 11 together. The first stop nose 43 extends so from an outside of the rotor radially inward, to the end groove 42 in that in the Verdrehweg the radial tabs 34 and 38 is arranged. In the assembled state by the biasing force of the spring element 5 acting bias becomes the first tab 34 in the circumferential direction against the first stop lug 43 pressed. Also the second stop nose 44 thus extends inwardly in the radial direction and is in the assembled state with the second radial tab 38 in the circumferential direction in Appendix. Therefore, the second stop nose also works 44 with the second radial tab 38 of the first holding section 17 the second bracket 18 together.

Furthermore, it should be mentioned that at least the first bulge 32 from the second bulge 36 in the same sense as the first holding portions of the first and second holders 11 and 18 the previous embodiments are circumferentially spaced. Preferably, the first bulge is also 32 to the second bulge 36 by an angle greater than 120 ° and less than 180 °, preferably 170 °, arranged offset. As a result, two in a circumferential direction, extending in the radial direction, first side edges of the first and second window 33 and 37 by an angle greater than 120 ° and less than 180 °, preferably 170 °, offset from one another.

The spring recording 3 The embodiments described above can also be configured as a trigger wheel, wherein the spring receiver 3 then having a cooperating with a sensor element, which sensor with the adjustment position of the spring receiver 3 linked signals generated.

LIST OF REFERENCE NUMBERS

1

Phaser

2

rotor

3

spring mount

4

Front side / spring side end

5

Spring element / spiral spring

6

Contact surface of the spring receiver

7

retaining bolt

8th

axis of rotation

9

lateral surface

10

first holding portion of the first holder

11

first bracket

12

second holding portion of the first holder

13

undercut

14

crosspiece

15

groove

16

opening

17

first holding portion of the second holder

18

second bracket

19

second holding portion of the second holder

20

Middle bar / longitudinal bar

21

Phaser

22

first holding portion part

23

second holding section part

24

groove

25

first opening

26

second opening

31

Phaser

32

first bulge

33

first window

34

first radial tab

35

Spring receiving portion

36

second bulge

37

second window

38

second radial tab

39

seal cover

40

first advantage

41

second lead

42

front groove

43

first stop nose

44

second stop nose

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2009/027167 A1 [0007]
• DE 102011082590 A1 [0008, 0029]
• DE 102010015175 A1 [0008]
• DE 102010015176 A1 [0008]

Claims (9)

Camshaft adjuster (1) for an internal combustion engine, having a stator and a driven-side rotor (2) which is rotatably mounted in the stator for achieving an adjustment of a rotatably attachable to it camshaft, and a spring receptacle (3) on an end face (4) of the rotor (2) is arranged, wherein the spring receptacle (3) by means of a spring element (5) relative to the stator in the direction of rotation prestressed and axially held on a rotor-side member in a holding position, wherein the spring element (5) with the spring receptacle (3 ) cooperates, that the spring receptacle (3) by means of the biasing force of the spring element (5) is screwed into the holding position, and wherein the spring receptacle (3) is held in the holding position by means of at least a first bayonet-type holder at least in the axial direction. Camshaft adjuster (1) to Claim 1 , characterized in that on the spring retainer (3) a first holding portion (10) of the first holder (11) is formed, one, on a statorfesten component or on the rotor (2) arranged second holding portion (12) of the first holder (11) engages behind in the axial direction. Camshaft adjuster (1) to Claim 2 , characterized in that the first holding portion (10) of the first holder (11) as a, in a lateral surface (9) of the spring receiving (3) introduced, first recess, groove, window or recess (33) is executed. Camshaft adjuster (1) according to one of Claims 2 and 3 characterized in that the second holding portion (12) of the first holder (11) is configured as a first projection (40) connected to the stator-fixed member, the first projection (40) extending radially inward from an inner peripheral surface of the stator-fixed member extends. Camshaft adjuster (1) according to one of Claims 1 to 4 , characterized in that the rotor (2) has a stop lug (43), against which in the circumferential direction of the rotor (2) a stop projection (34) connected to the spring receiver (3) is mounted for preventing rotation and / or the stop lug (43) a caused by the bias of the spring element (5) rotation of the spring receptacle (3) limited. Camshaft adjuster (1) according to one of Claims 1 to 5 , characterized in that the spring receptacle (3) in the holding position by means of at least one further, second bayonet-type holder (18) is held axially, which second holder (18) in the circumferential direction to the first holder (11) by an angle greater than 120 ° and smaller 180 ° offset, preferably offset by 170 °, is arranged. Camshaft adjuster (1) to Claim 6 , characterized in that on the spring receptacle (3) a first holding portion (17) of the second holder (18) is formed, the second, on a statorfesten component or on the rotor (2) arranged holding portion (19) of the second holder ( 18) engages behind in the axial direction, and / or the first holding portion (17) of the second holder (18) as a, in a lateral surface (9) of the spring retainer (3) introduced, second recess (37) is executed and / or the second Holding portion (19) of the second holder (18) is designed as a stator with the associated second projection (41), wherein the second projection (41) extends radially inwardly from an inner peripheral surface of the statorfesten component. Camshaft adjuster (1) to Claim 7 , characterized in that the first and second recesses (33 and 37) each have a, in the circumferential direction following, extending in the radial direction, the first side edge, wherein the first side edge of the first recess (33) in the circumferential direction of the spring receptacle (3) to the first side flank of the second recess (37), with respect to the axis of rotation (8) about which the spring retainer (3) is rotatably mounted, offset by an angle greater than 120 ° and less than 180 °, preferably offset by 170 °. Camshaft adjuster (1) according to one of Claims 1 to 8th , characterized in that the spring receptacle (3) is designed as a trigger wheel, which is designed to cooperate with a sensor.

Images