EP3084153B1 - Camshaft adjusting device, combustion engine and assembly method - Google Patents

Description

The invention relates to a camshaft adjusting device according to the preamble of claim 1 comprising an electromagnetic actuator with an adjusting arm axially adjustable armature for actuating a hydraulic valve for adjusting the camshaft. The camshaft adjusting device comprises fastening means for fixing the actuator to a motor element, in particular a housing element, for example a chain box or on the engine block. Furthermore, the invention relates to an internal combustion engine, in particular a motor vehicle internal combustion engine with such a camshaft adjusting device and a method for assembling a camshaft adjusting device according to the preamble of claim 13. Camshaft adjusting devices for internal combustion engines are well known and are used to change the relative angular position of the camshaft and thus the cam relative to the crankshaft internal combustion engine. The camshaft adjustment is carried out hydraulically, wherein the control of the pressurized fluid via at least one hydraulic valve, which can be actuated by means of an axially adjustable along an adjustment axis anchor actuator.

To attach the actuator of the camshaft adjusting device to a motor element, it is known to use a screw, as shown for example in the DE 102 11 467 A1 , of the DE 10 2007 019 923 A1 and DE 10 2006 031 517 A1 is disclosed. This assembly is relatively expensive and therefore relatively expensive.

Therefore, for example, by the applicant easier to install camshaft adjusting devices have been developed, as this example in the DE 20 2010 007 406 U1 are described. In the camshaft adjusting device shown there, the fastening means comprise a plurality of circumferentially spaced resilient elements for forming a plug-in rotary closure, so as to be able to simplify the actuator to be mounted on a motor element by a twisting movement.

From the DE 10 2012 003 648 B3 a camshaft adjusting device is known in which the actuator is also set in a plug-and-turn movement on a motor element. A disadvantage of the known solution, however, is that sufficient space must be kept free in the circumferential direction for the realization of the rotational movement for transferring the actuator into its mounting position, which can not be used to arrange further functional parts. A further disadvantage is that the actuator of the known camshaft adjusting device can be unintentionally adjusted by applying a sufficiently large disassembly force in the circumferential direction from its mounting position out.

From the DE 20 2011 050 746 U1 For example, a stator assembly for an electromagnetic camshaft adjuster is known in which the electromagnetic actuator is mountable and disassemblable in a combined plug-and-turn motion. In a mounting position, a rotation of the electromagnetic actuator is possible.

From the DE 10 2010 012 917 A1 a camshaft adjusting device is known which can only be assembled and disassembled in a combined plug-in rotational movement, wherein in a mounting position, a twisting of the actuator is possible. In one embodiment, the actuator is secured by means of a spring clip.

The problem with all camshaft adjusting devices in which the actuator is fixed by means of a plug-and-turn movement on the motor element is that an applied, usually in the radial direction sealing ring seal during assembly axially (plug movement) and in the circumferential direction (rotational movement) force is applied, whereby the ring seal is exposed to extreme forces, which can lead to a pre-damage of the ring seal. In addition, the manual assembly is uncomfortable due to the high, necessary forces.

Another problem is that known rotary-plug connections due to the necessary action on the ring seal in the axial direction (overpressure) and in the circumferential direction (rotary motion) is difficult, which are used as ring seals no conventional O-rings but special seals with which is tried to defuse the above problem.

Based on the aforementioned prior art, the object of the invention is therefore to provide a camshaft adjusting device with an actuator mountable with a simple, preferably less powerful, assembly movement, which is better secured against unintentional disassembly. Furthermore, the object is to provide an internal combustion engine with such a camshaft adjusting device and a simplified assembly method for a camshaft adjusting device, which guarantees optimum securing of the actuator on the motor element.

This object is achieved with regard to the camshaft adjusting device having the features of claim 1, with regard to the internal combustion engine having the features of claim 12 and with regard to the mounting method having the features of claim 13. Advantageous developments of the invention are specified in the subclaims. All combinations of at least two features disclosed in the description, the claims and / or the figures fall within the scope of the invention. In order to avoid repetition, features disclosed according to the device should be regarded as disclosed according to the method and be able to be claimed. Likewise, according to the method disclosed features should be considered as device disclosed and claimed claimable.

The invention is based on the idea of the fastening means of the camshaft adjusting device in such a way that the actuator in a pure translational movement, in particular a pure insertion movement, preferably along the longitudinal extent of the adjustment axis of the axially adjustable armature of the actuator, in its mounting position on the motor element can be transferred, in which the actuator is secured against rotation in the circumferential direction relative to the motor element, wherein, conversely, the disassembly movement is also purely translationally executable in a direction opposite to the mounting direction. In this way, space can be saved in the circumferential direction, since no space for realizing a rotational movement of the actuator, in particular due to a possibly provided radially projecting contact socket (connector socket) of the actuator, must be kept free on the motor element. As a further inventive measure, it is provided that the spring means with which the actuator is braced against the motor element, in a securing position in which they develop the aforementioned bracing, the assembly path 180 ° opposite disassembly, preferably along the adjustment axis of the armature, ie block along the longitudinal extension of the adjustment axis of the armature, for example by engaging in the actuator, this overlap or enforce. In this case, the spring means act on the actuator in contrast to embodiments of the prior art in the (translational) mounting direction with a spring force. The spring means thus comes in its safety position a double function - they bring a spring force in the mounting direction on the actuator in the direction of engine element and also lock a translational disassembly, while twisting the actuator in its mounting position in the circumferential direction by the interlocking means, in which the actuator can only be inserted translationally is reliably prevented.

The assembly method according to the invention adopts the above constructive design in that the actuator in a pure translational assembly movement (plug movement), preferably in the direction of the adjustment axis of the armature, particularly preferably in the direction of the longitudinal extent (adjustment) of an actuatable by means of the armature valve tappet of the valve of the camshaft adjustment its mounting position is transferred to the motor element, in which the actuator is secured against rotation in the circumferential direction by means of the positive locking means, wherein the spring means are transferred to the transfer of the actuator in its mounting position in a safety position, in particular by adjusting the spring means in a direction perpendicular to the mounting direction extending plane, wherein the spring means in this safety position on the one hand apply an axial clamping force on the actuator in the direction of the motor element and beyond one of the mounting movement opposite Dismantling movement or a translational assembly path opposing disassembly obstruct or block, in particular by the spring means enforce the actuator overlap or at least intervene in this, at least so with this in interaction occur that this can not be dismantled translationally against the translational mounting direction. Preferably, the spring means are the only means that prevent the translational, especially non-destructive disassembly, ie according to a preferred embodiment, there are no further elements in the disassembly.

The inventive design of the camshaft adjusting device and the inventive implementation of the assembly process and the dismantling ensure that preferably provided on the actuator ring seal, which seals the actuator against the motor element particularly preferably in the mounted state in the radial and / or axial direction in the assembly for lack of rotational movement Impact force is applied circumferentially, whereby the ring seal is optimally protected. This is due to the inventive separation of the assembly steps of the axial Aufsteckens of the actuator and thus overpressure of the radially sealing O-ring and the angularly oriented therefor mounting force for the spring clips.

In addition, the assembly force and the disassembly force, especially for manual installation purposes compared to the prior art is significantly reduced. It is also possible to use conventional O-ring seals as a ring seal - special geometries for minimizing contact pressure can be dispensed with. Particularly preferably, the O-ring seal during assembly is moved axially along an insertion be, which ensures that preferably designed as an O-ring seal ring seal due to the axial movement with a radial force component is applied and the ring seal is thus compressed in the radial direction. As a result, the O-ring seal during movement along the insertion be subjected to force only in the axial direction and in the radial direction, but not in the circumferential direction.

In a further development of the invention is advantageously provided that the actuator, in particular by means of the positive locking means, in its translational assembly movement, in particular during an end portion of this assembly movement is axially guided, i. is secured against rotation in the circumferential direction. This can be realized by the fact that the positive locking means of the actuator and the motor element already engage axially on the motor element before reaching the mounting position of the actuator.

With regard to the specific design of the positive locking means, there are different possibilities. It is essential that they prevent one, preferably any, rotational movement of the actuator in its mounting position by an axial meshing, in particular along the Ankerverstellachse. In this case, it is possible, for example, to provide at least one positive-locking element extending parallel to the adjustment axis on the actuator, which is received in the mounting position (and preferably already a distance in front) between two counter-elements spaced apart in a circumferential direction about the adjustment axis of the armature and extending parallel to the adjustment axis , Instead of counterclaimed in the circumferential direction counter elements and two circumferentially spaced counter element sections, for example, two inner peripheral portions of a receiving opening may be provided in the engine element. Additionally or alternatively, the above arrangement can also be realized vice versa, namely in which at least one of the motor element and parallel to the adjustment axis of the armature in the direction of the actuator extending positive locking element in the mounting position (and preferably already a piece previously) between two in a circumferential direction around the Adjusting axis spaced and parallel to the adjustment axis extending counter-elements or counter-element sections, for example, inner peripheral portions of an opening is included in the actuator. Regardless of whether the counter-elements or counter-element sections are provided on the actuator or on the motor element, they limit a translationally accessible mounting opening, into which the opposite positive-locking element can be introduced by a translatory adjusting movement of the actuator to the motor element and thereby transferred to the mounting position.

The positive-locking element and / or the counter-elements of the actuator preferably extend / extend in the radial direction to the outside.

To obstruct a translational disassembly path opposite the translational mounting path, it is preferred if the spring means in its securing position pass through the interlocking means, in particular the interlocking element and / or the counter elements or counter element sections or at least engage in a receiving opening of the interlocking element or at least one counter element or counter element section. At the same time thereby the positive locking element can be fixed in its securing position. It has proved to be particularly advantageous when the spring element is received between two opposing counter-elements of the motor element in the circumferential direction and thereby engages over or passes through the positive-locking element of the actuator.

It is also possible that the positive-locking element is penetrated by the spring means, in particular at an angle to a disassembly direction and is supported axially on the counter-elements.

It is expedient if the spring means are translatable in a translational or rotational fixing movement in the securing position in which they obstruct the disassembly path and load the actuator spring force, it being particularly preferred if the translational or rotatory fixing movement in an angular plane, very particularly preferably perpendicular to the adjustment axis of the armature and thus angled or perpendicular to the mounting or dismounting direction extending fixing plane is executable. With regard to the specific design of the spring means, there are different possibilities.

It is particularly expedient if the spring means comprise a, in particular metallic spring strip, which is designed to be resilient perpendicular to its longitudinal or circumferential extension about the adjustment axis of the actuator, in particular by providing at least one elastically deformable bend or curvature perpendicular to the longitudinal extent of the spring strip extends. As an alternative to a spring strip can also be used, for example, a spring clip having two, in particular strip-shaped sections, wherein preferably one of the sections is flat and the other has a curvature. A clip-type design facilitates pre-assembly of the spring means in a preassembly position on the actuator. Regardless of the specific embodiment of the spring means, for example as at least one spring strip or at least one spring clip, it is preferable to provide a plurality of spring elements, in particular spring strips or spring clips, preferably two spring elements, in particular spring strips or spring clips, and to connect them together via a connecting portion, in particular in one piece form, so as to be able to simultaneously move both spring elements at circumferentially about the adjustment axis of the armature positions, ie by a common fixing movement in the securing position, in which they preferably spring force in each case the actuator in the direction of motor element and simultaneously obstruct the translational disassembly path or lock.

As already indicated, it is particularly expedient for easier assembly when the spring means, in particular in a recess, of the actuator are preassembled and can be transferred in the mounting position of the actuator from a pre-assembly position on the actuator in the securing position. Preferably, the spring means are resilient in the preassembly position on the actuator, in particular held by latching or exclusively clamping.

With regard to the specific configuration of the spring means, which are preferably designed as a stamped-bent part or parts, for realizing a preassemblability, there are different possibilities. One possibility is in the aforementioned embodiment of the spring means as a spring clip. However, a Vormontierbarkeit is also possible in another, for example in a strip-shaped, design of the spring means, especially when the spring means - regardless of the realization of a strip form, two, for example, parallel spring sections comprise, namely a main spring portion, for the bracing of the actuator is responsible for the engine element in the securing position and a secondary spring portion for, for example, clamping and / or resilient, holding the spring means in a preassembly position on the actuator, wherein preferably the secondary spring portion is formed and / or arranged such that this in the securing position of the spring means the actuator not braced or with a lower spring force against the motor element than the main spring portion, so that it is avoided that the transfer of the spring means in the securing position by an otherwise provided addition of the spring forces of the spring sections e would swear.

In order for the secondary spring section to act less strongly or not resiliently on the actuator in the securing position, it is preferable for the spring bends of the main spring section and secondary spring section to be in the direction of To offset the longitudinal extent of the main spring portion and secondary spring portion and / or narrower the secondary spring portion and / or form of a thinner material than the main spring portion.

In order to ensure an exact position of the spring means in the securing position or to define the securing position precisely, it is preferable to provide the spring means with a stop which is designed so that it limits the fixing movement in the securing position. The stop can be realized for example as an angled end of a spring-strip-shaped spring means. It is also possible to provide the spring means with a, preferably at an angle to the longitudinal extent of the spring means, in particular a spring strip arranged grip portion to grip the spring means easier and thus easier to assemble and disassemble. It is also conceivable that the aforesaid grip section simultaneously serves as a stop. Additionally or alternatively to the realization of a stop on the spring means, it is possible to prevent the assembly movement, i. Forming movement of the spring means limiting stop on the engine element form, for example, as an axial end of a Federmittelführung. Such an embodiment is particularly advantageous if it is dispensed with a stop on the spring means and / or on the spring means a handle portion for facilitating gripping the same is provided.

In order to secure the spring means in the securing position against unintentional movement against a fixing direction, it is preferred to realize a positive connection between the spring means and the actuator and / or the motor element, in particular by an opening or depression is provided in the spring means, the form-fitting with a survey of the actuator or the motor element cooperates. The above explained form fit can also be realized to the Secure spring means in the pre-assembly position on the actuator with positive locking.

As part of an advantageous embodiment of the assembly method is provided in a further development of the invention that a provided on the actuator, preferably designed as an O-ring seal, ring seal is loaded during assembly exclusively in the axial direction and / or in the radial direction, but not in the circumferential direction ,

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings.

Fg. 1 bis 2:

ausschnittsweise ein erstes Ausführungsbeispiel einer Nockenwellenverstellvorrichtung in unterschiedlichen Montage- bzw. Fixierstadien, wobei die Federmittel in deren Sicherungsposition Gegenelemente des Motorelementes durchsetzen und in gegenüberliegende Gegenelemente eingreifen,

Fig. 3 und 4:

ein alternatives Ausführungsbeispiel einer Nockenwellenverstellvorrichtung, wobei die Federmittel in die Sicherungsposition Formschlusselemente des Aktuators durchsetzen,

Fig. 5 und 6:

ein weiteres Ausführungsbeispiel einer Nockenwellenverstellvorrichtung in unterschiedlichen Montagezuständen,

Fig.7:

ein Ausführungsbeispiel einer Nockenwellenverstellvorrichtung mit rotatorisch festlegbaren Federmitteln,

Fig. 8:

ein Ausführungsbeispiel einer Nockenwellenverstellvorrichtung mit zwei einteilig über ein Verbindungsstück ausgebildeten Federstreifen, wobei die Verbindung bogenförmig ausgestaltet ist,

Fig. 9:

ein weiteres alternatives Ausführungsbeispiel einer Nockenwellenverstellvorrichtung mit geradlinig verbundenen Federstreifen,

Fig. 10:

ein weiteres alternatives Ausführungsbeispiel einer Nockenwellenverstellvorrichtung mit einteilig ausgebildeten, rotatorisch in eine Sicherungsposition überführbaren Federstreifen,

Fig. 11 bis 13:

ein weiteres Ausführungsbeispiel einer Nockenwellenverstellvorrichtung mit vormontierbaren Federmitteln in unterschiedlichen Montagepositionen, wobei die Federmittel jeweils einen Haupt- und einen Nebenfederabschnitt aufweisen,

Fig. 14 bis 16:

ein weiteres alternatives Ausführungsbeispiel einer Nockenwellenverstellvorrichtung mit klammerartigen Federmitteln,

Fig. 17:

ein weiteres Ausführungsbeispiel einer Nockenwellenverstellvorrichtung, bei der die Federmittel in einer Vormontageposition am Aktuator verrastbar sind, und

Fig. 18:

eine schematische Darstellung einer Einbausituation eines Aktuators einer Nockenwellenverstellvorrichtung, wobei sich der Aktuator in radialer Richtung über eine als herkömmliche O-Ring-Dichtung ausgebildete Ringdichtung am Motorelement, konkret am Innenumfang einer Aufnahmeöffnung (Ausnehmung) für den Aktuator im Motorelement abstützt.

These show in:

Figures 1 to 2:

a detail of a first embodiment of a camshaft adjusting device in different mounting or fixing stages, wherein the spring means in their securing position enforce counter-elements of the motor element and engage in opposing counter-elements,

3 and 4:

an alternative embodiment of a camshaft adjusting device, wherein the spring means in the securing position prevail form-fitting elements of the actuator,

5 and 6:

a further embodiment of a camshaft adjusting device in different assembly states,

Figure 7:

An embodiment of a camshaft adjusting device with rotatably determinable spring means,

Fig. 8:

An embodiment of a camshaft adjusting device with two integrally formed via a connector spring strip, wherein the compound is designed arcuate,

Fig. 9:

a further alternative embodiment of a camshaft adjusting device with rectilinear spring strips,

Fig. 10:

a further alternative embodiment of a camshaft adjusting device with integrally formed, rotationally convertible into a securing position spring strip,

11 to 13:

a further embodiment of a camshaft adjusting device with preassemblable spring means in different mounting positions, wherein the spring means each have a main and a minor spring portion,

FIGS. 14 to 16:

a further alternative embodiment of a camshaft adjusting device with clamp-like spring means,

Fig. 17:

a further embodiment of a camshaft adjusting device, wherein the spring means are latched in a preassembly position on the actuator, and

Fig. 18:

a schematic representation of an installation situation of an actuator of a camshaft adjusting device, wherein the actuator is supported in the radial direction via a designed as a conventional O-ring seal ring seal on the motor element, specifically on the inner circumference of a receiving opening (recess) for the actuator in the motor element.

In the figures, like elements and elements having the same function are denoted by the same reference numerals.

In the Fig. 1 and 2 a first embodiment of a camshaft adjusting device 1 is shown in a sectional view. Evident is a motor element 2, for example, a housing of a motor attachment or directly a motor housing and an actuator 3, which in its interior in a known manner has a bestrombare winding in its interior, which can be powered via a connector socket 4. By energizing the winding an intended within the actuator 3 anchor (not shown) along an adjustment axis 5 is axially adjustable.

The adjustment axis 5 extends in the embodiment shown perpendicular to the surface extension of an upper side 6 of the actuator 3, as well as perpendicular to a longitudinal extension of the connection socket. 5

With regard to a possible embodiment of the internal structure of the actuator is on the DE 20 2010 007 406 U1 directed. Preferably, the armature frontally associated with a ball, with which the armature can be supported on the rotating hydraulic valve.

As can be seen from a synopsis of Fig. 1 and 2 results, the actuator 3 in a pure translatory insertion movement along the adjustment axis 5 of the actuator 3 from the in the Fig. 1 shown position in the Fig. 2 shown assembly position 7 are transferred, in which the actuator 3 is secured against rotation in the circumferential direction on the motor element 2 by means of positive locking means 8.

In the embodiment shown, the positive locking means comprise two opposing pairs of circumferentially spaced around the adjustment axis 5 counter-elements 9, 10 on the motor element and two diametrically opposed form-fitting elements 11, wherein each positive-locking element 11 in the in Fig. 2 shown mounting position between two counter-elements 9, 10 of the motor element 2 is received and thus secured against rotation. In the assembly movement is not a plug-in rotary movement, but a pure insertion movement along the adjustment axis 5 of the actuator 3, viewed in the mounting position. 7

In the mounting position, the actuator 3 is axially clamped in the mounting direction against the motor element 2 with the aid of spring means 12 exemplarily designed as a spring strip. At the same time, the actuator 3 is locked by a dismantling path, which is directed opposite the translational mounting path, being blocked by the spring means if these oneself, as in Fig. 2 Based on the right in the drawing plane spring means 12 shown in a securing position 13 are. In this safety position, the spring means, as in the drawing plane according to Fig. 2 indicated on the left. Here, the spring means 12 pass through the counter-elements 9 and protrude into the counter-elements 10 and thereby overlap (alternatively, for example, enforce) the positive-locking elements 11. At these, the spring means 12 are supported in the securing position in the axial direction.

The strip-shaped spring means 12 each comprise a stop 14 for limiting the fixing movement of the spring means 12. As is apparent from Fig. 2 results, the aforementioned fixing movement is realized in a perpendicular to the adjustment axis 5 of the armature extending plane, in the concrete embodiment in the context of a translatory plug movement.

The designated by the reference numeral 14 portion of the spring means 12, which is arranged at an angle to the longitudinal extent of the strip may additionally or alternatively to the stop function have a handle function, ie serve as a grip surface or handle portion for easier assembly and disassembly. In this case, it is preferable if the stop is formed on the motor element in order to limit the assembly movement defined.

In the embodiment according to the Fig. 3 and 4 is the actuator 3 also mounted in a pure plugging movement, wherein in the embodiment according to Fig. 3 and 4 Positive locking elements 11 are provided on the motor element 2 and are encompassed in the mounting position of counter-element sections 15, 16 of the actuator 3, so as to prevent in the mounting position rotation of the actuator 3 about the adjustment axis 5 of the armature relative to the motor element 2 safe.

In the mounting position, the likewise exemplary strip-shaped spring means 12 in an in Fig. 4 The drawing plane shown on the left securing position are transferred by a purely translational movement in a direction perpendicular to the adjustment axis 5 extending plane, wherein the spring means 12 pass through the form-locking elements 11 of the actuator 3 and axially supported on the counter-elements 15, 16.

It can be seen that the spring means 12 are guided in their translatory adjustment movement in the securing position, by a corresponding configuration of the counter-elements 15, 16. At the same time, the actuator 3 is axially guided in its translational assembly movement along the adjustment axis 5, as soon as the positive locking means already before reaching the mounting position according to Fig. 4 interact.

In the Fig. 5 and 6 is a sectional view of a mounting situation shown. The motor element 2 protrudes from the motor element 2 parallel to the adjustment axis 5 in the direction of the actuator 3 and is surrounded by counter element sections 15, 16 of the actuator 3. The interlocking element 11 has a perpendicular to the longitudinal extension of the adjustment. 5 extending breakthrough 17, which in the in Fig. 6 shown securing position of the spring means 12 is penetrated by these. It can be seen that the spring means 12 act in the mounting position, the actuator 3 axially relative to the adjustment axis 5 to the motor element 2 spring force.

In the embodiment according to Fig. 7 the spring means 12 are also designed strip-shaped, but these are forced into a rotational movement when they are transferred to the securing position, as shown in the drawing plane right. In the securing position, the spring means 12 here by way of example in each case pass through a positive-locking element 11 of the motor element 2.

In the embodiment according to Fig. 8 The spring means 12 comprise two strip-shaped spring sections, which are connected to each other via a connecting section 18, which is formed bent in the embodiment shown, so as to circumnavigate the actuator 3.

In the specific embodiment, the connecting portion 13 is formed integrally with the spring portions, wherein it is preferably in the spring means 12 is a stamped and bent part. Due to the one-piece design or by connecting together two spring strips or spring sections, the entire spring means 12 in a common fixing movement in the in Fig. 8 shown securing position are transferred.

In the embodiment according to Fig. 9 Again, two integrally formed or interconnected spring portions are provided again, in which case, however, the connecting portion 18 is designed just in the manner of an angled handle.

In the embodiment according to Fig. 10 The spring means 12 comprise two rotatably adjustable spring sections, which are connected to one another via a bent connecting section 18, so as to be able to realize the rotational fixing movement of both spring sections in a common movement.

In the embodiment according to Fig. 11 to 13 the spring means 12 comprise a main spring portion 19 and an auxiliary spring portion 20 extending by way of example thereto. The main spring portion 19 has, as is apparent from Fig. 13 results in the task in the illustrated securing position to clamp the actuator 3 against the motor element 2, while the secondary spring portion 20, as is apparent from Fig. 12 results, the spring means 12 in a pre-assembly position on the actuator 3 ensures captive. For this purpose, the secondary spring section 20 engages in a corresponding passage opening of the actuator 3.

In the Fig. 13 shown assembly securing position is a spring clip 21st or a spring elevation 21 of the secondary spring section 20 is pushed completely through the aforementioned recess and thus has no or hardly any spring action, while the main spring section 19 with its spring action vollfederkraftbeaufschlagt the actuator 3 and simultaneously secures the actuator 3 against a translational removal against the translational mounting direction on the motor element 2 ,

From the Fig. 11 to 13 can also be seen that the secondary spring portion 20 is much filigree, designed narrower in the concrete embodiment, as the main spring portion 19. In addition, the spring elevations 21 are arranged offset in the direction of the longitudinal extent of the spring means 12.

In the embodiment according to the Fig. 14 to 16 the spring means 12 are formed as spring clips with two at least approximately parallel longitudinal sections. The spring means 12 can be held in a pre-assembly position by clamping on the actuator 3, as shown in FIG Fig. 15 is shown. For this purpose, the spring means engage in an opening 22 in the actuator 3 a. After transferring the actuator 3 in the mounting position, the spring means 12 in the in Fig. 16 shown securing position, where they enforce example here in this securing position interlocking elements 11 of the motor element 2 in the direction of their longitudinal extension and thus lock the actuator 3 against a translational removal. In Fig. 14 It can be seen that 11 guide portions are integrally formed on the interlocking elements to guide the staple-shaped spring means 12 in their translatory fixing movement.

In Fig. 17 an embodiment of a camshaft adjusting device 1 and an actuator 3 thereof is shown, in which the exemplary strip-shaped spring means 12, as in the drawing plane below results in a preassembly position positively secured to the actuator 3, by a projection 23 of the actuator 3, which is located on a guide or support surface for the spring means 12 engages in an opening 24 in the spring means 12.

In Fig. 18 is a generic installation situation of an actuator of a camshaft adjusting device according to the invention shown by way of example, as it is feasible in all the previously described embodiments, but for reasons of clarity there is not shown in detail. It can be seen that circumferentially on the actuator 3 in a lateral circumferential groove 25 formed as a conventional O-ring seal ring seal 26 is received, which is subjected to force in the installation situation in the radial direction and thereby radially inward on the groove bottom of the circumferential groove and the inner circumference 27th a receiving opening in the motor element 2 for the actuator 3 is supported. Since the assembly of the actuator 3 is carried out in a pure insertion movement, the ring seal 26 is subjected to force either during assembly or disassembly in the circumferential direction about the adjustment axis 5 of the actuator armature. During assembly, the ring seal 26 is moved along a chamfer or insertion bevel 28 of the receiving opening on the motor element 2, whereby a radial force component is generated on the ring seal 26.

reference numeral

1

Camshaft adjusting device

2

motor element

3

actuator

4

socket

5

Adjustment axis of the actuator armature

6

Top of the actuator

7

mounting position

8th

Fit means

9, 10

against elements

11

Form-fitting element

12

spring means

13

securing position

14

attack

15, 16

against elements

17

breakthrough

18

connecting portion

19

Main spring section

20

Next spring section

21

spring clip

22

opening

23

survey

24

opening

25

circumferential groove

26

ring seal

27

inner circumference

28

chamfer

Claims (15)

1. Camshaft adjusting device comprising an electromagnetic actuator (3), with an anchor axially adjustable along an adjusting axis (5), for operating a hydraulic valve for adjusting the cam, as well as fastening means for attaching the actuator (3) to a motor element (3), wherein the fastening means comprise spring means (12) which in a securing position (13) brace the actuator (3) against the motor element (2)
   characterised in that
   the fastening means have positive-locking means (8) as anti-twist protection, for preventing a twisting movement of the actuator (3) in an assembly position (7) relative to the motor element (2), which are designed and arranged in such a way that the actuator (3) is adjustable into the assembly position (7) through a purely translational assembly movement of the anchor towards the motor element (2),in particular along the adjusting axis (5), and in that in the securing position (13) the spring means (12) block a disassembly path for a purely translational disassembly movement of the actuator (3) contrary to the assembly movement in such a way that the actuator cannot be disassembled contrary to the purely translational assembly direction.
2. Camshaft adjusting device according to claim 1
   characterised in that
   during its translational assembly movement the actuator (3) is axially guided, more particularly by means of the positive-locking means (8).
3. Camshaft adjusting device according to any of claims 1 or 2
   characterised in that
   on the actuator (3) the positive-locking means (8) comprise at least one positive locking element (11) extending in parallel to the adjusting axis (5), which in the assembly position (7) is held by two counter-elements (15, 16) or counter-element sections of the motor element (2) spaced in a circumferential direction about the adjusting axis (5) and extending in parallel to the adjusting axis (5), which delimit an assembly opening extending in parallel to the adjusting axis (5) and/or in that the positive-locking means (8) comprise at least one positive-locking element (11) on the motor element extending in parallel to the adjusting axis (5) which in the assembly position (7)is received by two counter-elements (15,16) or counter-element sections of the actuator (3) spaced in a circumferential direction about the adjusting axis (5) and extend in parallel to the adjusting axis (5), which delimit an assembly opening extending in parallel to the adjusting axis (5).
4. Camshaft adjusting device according to any one of the preceding claims,
   characterised in that
   in the securing position (13) the spring means (12) pass through the positive-locking means (8), in particular the positive-locking element and/or the counter-element (15, 16) or counter-element sections or at least engage in a receiving opening of the positive-locking element (11) or of at least one counter-element (15, 16) or of at least one counter-element section.
5. Camshaft adjusting device according to any one of the preceding claims
   characterised in that
   preferably the spring means (12), designed as a punched bending part, can in a translational or rotatory fixing movement be moved into the securing position (13).
6. Camshaft adjusting device according to claim 5
   characterised in that
   the translational or rotatory fixing movement can be carried out in an fixing plane extending at an angle, preferably at right angles, to the adjusting axis (5) and thus the assembly and disassembly direction.
7. Camshaft adjusting device according to any one of the preceding claims
   characterised in that
   the spring means (12) comprise a, more particularly metallic, spring strip or a spring clip which is designed in a sprung manner perpendicularly to its longitudinal or circumferential extent, in particular through the provision of a curvature, and/or in that two, in particular metallic, spring strips or spring clips of the spring means (12) are connected, more particularly in one part, via a connection section (12) in order to be able bring the spring strips or spring clips into the securing position (13) in a joint fixing movement.
8. Camshaft adjusting device according to any one of the preceding claims
   characterised in that
   the spring means (12) can be pre-assembled, more particularly in a recess of the actuator (3) and in the assembly position (7) of the actuator (3) can be moved from a pre-assembly position into the securing position (13).
9. Camshaft adjusting device according to any one of the preceding claims
   characterised in that
   the spring means (12) comprise a main spring section (19) for bracing the actuator (3) against the motor element (2) and a secondary spring section (20) for holding the spring means (12) in a pre-assembly position on the actuator (3) and in that preferably the secondary spring section (20) is designed and/or arranged in such a way that in the securing position (13) of the spring means (12) it does not brace, or braces the actuator (3) against the motor element with smaller spring force than the main spring section (19).
10. Camshaft adjusting device according to any one of the preceding claims
    characterised in that
    the spring means (12) have a stop (14), in particular in the form of an angled end section, for limiting their fixing movement and/or an, in particular angled, grip surface for facilitating assembly and disassembly.
11. Camshaft adjusting device according to any one of the preceding claims
    characterised in that
    the spring means (12) comprise an opening or recesses for locking interaction with a projection (23) of the actuator (3) or the motor element (2).
12. Camshaft adjusting device according to any one of the preceding claims
    characterised in that
    incorporated on the actuator (3), more particularly in a peripheral and radially outwardly open groove, preferably circumferential groove, is an ring seal (26), preferably designed as an O-ring seal, which during the assembly, disassembly and in the mounted state of the actuator (3) is exclusively subjected to a force in the axial and radial direction, preferably not in the circumferential direction.
13. Combustion engine with a camshaft adjusting device (1) according to any one of the preceding claims.
14. Assembly method for a camshaft adjusting device (1) according to any one of claims 1 to 12
    characterised in that
    in a purely translational assembly movement, preferably in the direction of the adjusting axis (5) of the anchor, the actuator (3) is moved into an assembly position (7) on the motor element, in which by means of the positive-locking means (8) the actuator (3) is secured against twisting relative to the motor element and in that the spring means (12) are moved into a securing position (13) in which they brace the actuator (3) against the motor element and at the same time block a disassembly path along the adjusting axis (5) of the anchor contrary to the translational assembly path of the actuator (3) and secure the actuator (3) on the motor element against a translational disassembly movement contrary to the translational assembly movement.
15. Assembly method according to claim 14
    characterised in that
    to brace and secure the actuator (3) the spring means (12) are moved from a pre-assembly position on the actuator (3) into a securing position (13), more particularly in a translation or rotatory movement, in particular in a fixing plane extending at an angle, preferably at right angles, to the translational assembly direction.

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