DE102010031170A1 - Motor gear box arrangement for driving seat adjustment device in motor car, has locking element inserted into retainer such that element prevents movement of motor housing relative to transmission housing with respect to abutment surfaces - Google Patents

Abstract

The arrangement has a motor housing (1) provided with a connection section (3) and a retaining projection (4), and a locking element provided with abutment surfaces. A transmission housing has a motor housing receptacle, and the connecting section is accommodated in the receptacle, where the receptacle performs retaining recess. The locking element is inserted into a locking element retainer such that the element prevents movement of the motor housing relative to the transmission housing along an axial direction (A) of the motor housing with respect to abutment surfaces. The motor housing is designed as a housing of an electromotor e.g. direct current motor. Independent claims are also included for the following: (1) a method for assembling a motor gear box arrangement (2) a device for manufacturing a motor housing (3) a method for manufacturing the motor housing.

Description

The invention relates to a motor-gear arrangement and a motor housing and a transmission housing assembly for this. Furthermore, the invention relates to a method for mounting such a motor-gear arrangement and to an apparatus and a method for producing a motor housing for this.

Drive units, as used, for example, in motor vehicles for driving a wide variety of adjustment devices, for example for motor vehicle seats, often make it necessary to connect a drive torque providing motor, in particular a DC electric motor, with a housing of a downstream transmission to convert the torque and thereby form an engine-transmission assembly. One way to make such a connection is to attach the motor housing to the gearbox by means of a plurality of screws. However, the assembly cost of assembling such a motor-gear arrangement is high in such a screw connection and the assembly time consuming.

The DE 10 2008 047 242 A1 describes a drive device for adjusting devices in motor vehicles with an electric motor and a transmission. The electric motor is housed here in a motor housing, the transmission in a transmission housing with a gear housing cover. On the transmission housing, a motor receptacle formed with an annular collar is provided, in which the electric motor can be used. From the motor mount are in the engine longitudinal direction from mounting arms, which have window-like recesses. For fastening the motor housing to the gear housing, wedge-shaped form-fitting elements, which are provided in the region of an end of the motor facing away from the gear housing on the outside of the motor housing, are latched into these recesses. Further locking elements of the gear housing cover engage when placing the gear housing cover on the transmission housing between this and the end face of the motor housing to eliminate the axial clearance between the motor housing and the gear housing. That in the DE 10 2008 047 242 A1 shown gear housing requires, however, because of the long, protruding attachment arms for its production a fairly large and thus costly mold. Also comparatively much material is consumed for the mounting arms, which can also contribute to an increased weight of the arrangement.

Another drive unit with an electric motor and a transmission housing is in the DE 10 2005 030 217 A1 described. In this drive unit, the electric motor for connection to the transmission housing on a kind of bayonet lock. At the pole housing of the electric motor radial and axial recesses are provided for this purpose. Fastening webs of the gear housing can first be inserted axially into the axial recesses and then the electric motor can be rotated by a certain angle in order to axially fix the electric motor. The axial fixing of the position of the electric motor relative to the gear housing takes place in this drive unit exclusively by axial abutment of the fastening webs at the boundary of the radial recesses. However, this means that either relatively much force is required to bring the webs into the recesses, or that otherwise an axial clearance between the gear housing and the electric motor remains. In both cases, an exact axial positioning of the gear housing and electric motor to each other is difficult.

Against this background, it is the object of the present invention to allow for a motor-gear arrangement, a better and in particular safer assembly, disassembly and positioning of the gear housing with respect to the motor housing.

According to the invention this object is achieved by a motor-gear arrangement with the features of claim 1, by a motor housing having the features of claim 13, by a transmission housing assembly having the features of claim 14, by a method having the features of claim 15, by a Device with the features of claim 16 and by a method having the features of claim 17 solved.

• – Eine Motor-Getriebe-Anordnung, insbesondere zum Antreiben einer Verstelleinrichtung in einem Kraftfahrzeug, mit einem Motorgehäuse, welches einen Verbindungsabschnitt mit zumindest einem vorzugsweise sich in einer radialen Richtung des Motorgehäuses erstreckenden Haltevorsprung aufweist; mit einem Arretierelement, welches eine erste und eine zweite Anlagefläche aufweist; mit einem Getriebegehäuse, welches aufweist: eine Motorgehäuseaufnahme, in der der Verbindungsabschnitt aufnehmbar ist und die mit zumindest einer Halteausnehmung versehen ist, mit welcher der Haltevorsprung nach Art eines Bajonettverschlusses formschlüssig in Eingriff bringbar ist, und eine Arretierelementaufnahme, in welche das Arretierelement derart einsetzbar ist, dass es durch ein Anliegen der ersten Anlagefläche an dem Motorgehäuse und ein Anliegen der zweiten Anlagefläche an dem Getriebegehäuse eine Bewegung des Motorgehäuses gegenüber dem Getriebegehäuse entlang einer axialen Richtung des Motorgehäuses verhindert.
• – Ein Motorgehäuse für eine Motor-Getriebe-Anordnung vorgesehen. Das Motorgehäuse weist einen Verbindungsabschnitt mit zumindest einem sich in einer radialen Richtung des Motorgehäuses erstreckenden Haltevorsprung auf. Hierbei ist der Haltevorsprung für einen formschlüssigen Eingriff mit einer Halteausnehmung einer dem Motorgehäuse zugeordneten Motorgehäuseaufnahme eines Getriebegehäuses zur Aufnahme des Verbindungsabschnitts nach Art eines Bajonettverschlusses ausgebildet.
• – Eine Getriebegehäuseanordnung für eine Motor-Getriebe-Anordnung bereitgestellt. Die Getriebegehäuseanordnung ist mit einem Getriebegehäuse versehen, welches eine Motorgehäuseaufnahme aufweist. In der Motorgehäuseaufnahme ist ein Verbindungsabschnitt eines zugeordneten Motorgehäuses aufnehmbar. Zusätzlich ist die Motorgehäuseaufnahme mit zumindest einer Halteausnehmung versehen, mit welcher ein an dem Verbindungsabschnitt vorgesehener Haltevorsprung nach Art eines Bajonettverschlusses formschlüssig in Eingriff bringbar ist. Die Getriebegehäuseanordnung weist weiterhin einen Getriebegehäusedeckel auf, welcher mit einem Arretierelement mit einer ersten Anlagefläche und einer zweiten Anlagefläche versehen ist. Das Getriebegehäuse weist ferner eine Arretierelementaufnahme auf, in welche das Arretierelement derart einsetzbar ist, dass die erste Anlagefläche an dem in der Motorgehäuseaufnahme aufgenommenen Motorgehäuse und die zweite Anlagefläche an dem Getriebegehäuse anliegen.
• – Ein Verfahren zum Montieren einer Motor-Getriebe-Anordnung bereitgestellt, welches die folgenden Verfahrensschritte aufweist: Bereitstellen eines Motorgehäuses, welches einen Verbindungsabschnitt mit zumindest einem sich in einer radialen Richtung des Motorgehäuses erstreckenden Haltevorsprung aufweist; Bereitstellen eines Getriebegehäuses, welches eine mit zumindest einer Halteausnehmung versehene Motorgehäuseaufnahme und eine Arretierelementaufnahme aufweist; Bereitstellen eines Arretierelements, welches eine erste Anlagefläche und eine zweite Anlagefläche aufweist; Aufnehmen des Verbindungsabschnitts des Motorgehäuses in der Motorgehäuseaufnahme durch Einschiebendes Motorgehäuses in die Motorgehäuseaufnahme entlang der axialen Richtung des Motorgehäuses und Verdrehen des Motorgehäuses gegenüber dem Getriebegehäuse derart um einen vorbestimmten Winkel, dass der Haltevorsprung mit der Halteausnehmung nach Art eines Bajonettverschlusses formschlüssig in Eingriff gelangt; und Einsetzen des Arretierelements in die Arretierelementaufnahme derart, dass das Arretierelement durch ein Anliegen der ersten Anlagefläche an dem Motorgehäuse und ein Anliegen der zweiten Anlagefläche an dem Getriebegehäuse eine Bewegung des Motorgehäuses gegenüber dem Getriebegehäuse entlang einer axialen Richtung des Motorgehäuses verhindert.
• – Eine Vorrichtung zur Herstellung eines Motorgehäuses bereitgestellt. Die Vorrichtung weist ein Außenwerkzeug auf, welches dazu ausgebildet ist, einen Abschnitt eines Motorgehäuse-Rohlings entlang dessen Umfangsrichtung zu umschließen. An dem Außenwerkzeug ist eine innere Oberfläche vorgesehen, welche mit zumindest einer Vertiefung versehen ist, deren Form im Wesentlichen einer Außenkontur eines an dem Motorgehäuse-Rohling zu erzeugenden Haltevorsprungs entspricht. Ferner umfasst die Vorrichtung ein in einen Innenraum des Motorgehäuse-Rohlings einführbares Innenwerkzeug mit mehreren Backen. Jede der Backen weist eine äußere und eine innere Oberfläche auf. Ferner weist hierbei zumindest eine der Backen auf ihrer äußeren Oberfläche eine Erhebung auf, welche dafür ausgebildet ist, zusammen mit einem Abschnitt einer Wandung des Motorgehäuse-Rohlings in die Vertiefung eingedrückt zu werden und dadurch den Haltevorsprung zu formen. Darüber hinaus beinhaltet die Vorrichtung zur Herstellung eines Motorgehäuses einen sich verjüngenden Dorn, welcher entlang einer axialen Richtung des Motorgehäuse-Rohlings in einen zugeordneten Zwischenraum zwischen den Backen einführbar ist. Hierbei ist der Dorn mit den inneren Oberflächen der Backen derart in Anlage bringbar, dass dabei in einer radialen Richtung des Motorgehäuse-Rohlings eine Kraft zum Formen des Haltevorsprungs auf die Backen ausgeübt wird.
• – Ein erfindungsgemäßes Verfahren zur Herstellung eines Motorgehäuses weist die folgenden Verfahrensschritte auf: Bereitstellen einer erfindungsgemäßen Vorrichtung zur Herstellung eines Motorgehäuses mit einem Außenwerkzeug, einem Innenwerkzeug und einem Dorn; Bereitstellen eines Motorgehäuse-Rohlings mit einem offenen Ende; Einführen des Motorgehäuse-Rohlings in das Außenwerkzeug derart, dass das Außenwerkzeug einen Abschnitt des Motorgehäuse-Rohlings in Umfangsrichtung umschließt; Einführen des Innenwerkzeugs durch das offene Ende in einen Innenraum des Motorgehäuse-Rohlings; Einführen des Dorns entlang einer axialen Richtung des Motorgehäuse-Rohlings in den Zwischenraum zwischen den Backen des Innenwerkzeugs, wobei der Dorn mit den inneren Oberflächen der Backen zur Anlage gelangt, die Backen durch das Einführen des Dorns radial nach außen gedrückt werden, die Erhebung zusammen mit einem Abschnitt einer Wandung des Motorgehäuse-Rohlings in die Vertiefung des Außenwerkzeugs eingedrückt wird und dabei den Haltevorsprung formt.

Accordingly, it is provided:

• - An engine-transmission arrangement, in particular for driving an adjusting device in a motor vehicle, having a motor housing having a connecting portion with at least one preferably extending in a radial direction of the motor housing retaining projection; with a locking element, which has a first and a second contact surface; with a gear housing, comprising: a motor housing receptacle in which the connecting portion is receivable and which is provided with at least one retaining recess, with which the retaining projection in the manner of a bayonet lock is positively engageable, and a locking element receiving, in which the locking element is inserted in that it is due to a concern of the first contact surface on the motor housing and a concern of the second contact surface on the transmission housing a Movement of the motor housing relative to the gear housing along an axial direction of the motor housing prevented.
• - Provided a motor housing for a motor-gear arrangement. The motor housing has a connecting portion with at least one holding projection extending in a radial direction of the motor housing. Here, the retaining projection for a positive engagement with a retaining recess of a motor housing associated with the motor housing receptacle of a transmission housing for receiving the connecting portion is formed in the manner of a bayonet closure.
• - Provided a transmission housing assembly for a motor-gearbox assembly. The transmission housing assembly is provided with a transmission housing having a motor housing receptacle. In the motor housing receptacle, a connecting portion of an associated motor housing is receivable. In addition, the motor housing receptacle is provided with at least one retaining recess with which a holding projection provided on the connecting section can be brought into the form-fitting manner in the manner of a bayonet catch. The transmission housing assembly further comprises a gear housing cover, which is provided with a locking element having a first bearing surface and a second bearing surface. The transmission housing further has a locking element receiving, in which the locking element is used such that the first bearing surface abut the motor housing received in the motor housing receptacle and the second contact surface on the transmission housing.
• A method for assembling a motor-gear assembly is provided, comprising the following method steps: providing a motor housing having a connecting portion with at least one extending in a radial direction of the motor housing retaining projection; Providing a transmission housing which has a motor housing receptacle provided with at least one retaining recess and a locking element receptacle; Providing a locking member having a first abutment surface and a second abutment surface; Receiving the connecting portion of the motor housing in the motor housing receptacle by inserting the motor housing in the motor housing receptacle along the axial direction of the motor housing and rotating the motor housing relative to the gear housing by a predetermined angle, that the retaining projection with the retaining recess in the manner of a bayonet fitting positively engages; and inserting the locking element in the locking element receiving such that the locking element prevents a concern of the first bearing surface on the motor housing and a concern of the second bearing surface on the transmission housing movement of the motor housing relative to the transmission housing along an axial direction of the motor housing.
• - Provided an apparatus for producing a motor housing. The device has an outer tool which is adapted to enclose a portion of a motor housing blank along its circumferential direction. On the outer tool, an inner surface is provided, which is provided with at least one recess, the shape of which substantially corresponds to an outer contour of a holding projection to be produced on the motor housing blank. Furthermore, the device comprises an insertable into an interior of the motor housing blank inner tool with a plurality of jaws. Each of the jaws has an outer and an inner surface. Further, at least one of the jaws has on its outer surface on a survey, which is designed for, together to be pressed with a portion of a wall of the motor housing blank in the recess and thereby to form the retaining projection. Moreover, the apparatus for manufacturing a motor housing includes a tapered mandrel insertable along an axial direction of the motor housing blank into an associated space between the jaws. Here, the mandrel with the inner surfaces of the jaws can be brought into abutment such that in a radial direction of the motor housing blank, a force for forming the retaining projection is exerted on the jaws.
• - A method according to the invention for producing a motor housing comprises the following method steps: providing a device according to the invention for producing a motor housing with an outer tool, an inner tool and a mandrel; Providing a motor housing blank having an open end; Inserting the motor housing blank into the outer tool such that the outer tool encloses a portion of the motor housing blank in the circumferential direction; Inserting the inner tool through the open end into an inner space of the motor housing blank; Inserting the mandrel along an axial direction of the motor housing blank in the gap between the jaws of the inner tool, wherein the mandrel comes into abutment with the inner surfaces of the jaws, the jaws are pressed by the insertion of the mandrel radially outward, the survey together with a portion of a wall of the motor housing blank is pressed into the recess of the outer tool and thereby forms the retaining projection.

The idea of the present invention is to attach the gear housing and the motor housing by the engagement of the retaining projection in the retaining recess in the manner of a bayonet fitting to each other and by means of the insertion of the locking element in the Arretierelementaufnahme an axial clearance or, in other words, an axial To eliminate mobility of the gear housing relative to the motor housing. The elimination of the axial play is achieved by the concerns of the first contact surface on the motor housing and the concern of the second contact surface on the transmission housing. The connection of the gear housing and the motor housing according to the principle of the bayonet lock a particularly simple and quick installation of the gear housing is achieved on the motor housing. Similarly, the transmission housing and the motor housing can be separated from each other in a very simple manner for the purpose of disassembly again, for example, for repair work or production-accompanying checks for quality assurance. The use of a locking member to eliminate the axial clearance and thus to produce a defined axial position of the gear housing with respect to the motor housing can advantageously reduce the manufacturing accuracy requirements for the position and / or dimensions of the retaining recess and the retaining projection and the dimensioning of the tolerances for the interface of gearbox housing and motor housing. The bayonet connection can thus be carried out in particular also smooth, so that the assembly is simplified. In addition, because the retaining projection for forming the bayonet-type connection is provided on the connecting portion, no long, the motor housing to a large extent embracing mounting arms on the transmission housing are required. As a result, material is saved in the manufacture of the transmission housing. At the same time, the cost of a mold used for the production of the gear housing, for example, an injection mold can be reduced because the gear housing and thus the tool are more compact. In addition, the motor housing is advantageously encompassed by elements of the transmission housing to a much lesser extent. This reduces the coupling of the motor housing and gear housing with respect to the transmission of vibrations and also allows a better heat dissipation from the motor housing, since the motor housing is covered by the gear housing to a much lesser extent. The cooling of the engine is thereby improved.

Advantageous embodiments and modifications of the invention will become apparent from the other dependent claims and from the description in conjunction with the figures of the drawing.

In one embodiment of the invention, the first contact surface of the locking element is inclined to the second contact surface of the locking element. In particular, it includes an acute angle with this. This allows the gear housing and the motor housing when inserting the locking element in the Arretierelementaufnahme and the subsequent concerns of the first contact surface on the motor housing and the concern of the second contact surface on the gear housing due to a wedging action and a force resulting therefrom are clamped against each other. A mobility and an axial clearance of the gear housing relative to the motor housing are thus reliably prevented.

In a preferred embodiment of the invention, the insertion of the locking element takes place in the Arretierelementaufnahme the gear housing in a direction substantially perpendicular to the axial direction of the motor housing. This may prove to be particularly favorable in order to prevent the axial movement of the motor housing relative to the gear housing by means of the locking element, as in this way the locking element can push the gear housing particularly favorable with a force along the axial direction against the motor housing.

In a development of the invention, the first contact surface of the locking element is provided with a layer of an elastic material, in particular an elastomer. Additionally or alternatively, the second contact surface of the locking element is provided with a layer of an elastic material, in particular an elastomer. By providing an elastically compliant layer, in particular on the first abutment surface, which abuts against the motor housing, the motor housing can be formed by the transmission housing with respect to the transmission of vibrations, such as may arise from the operation of the engine and / or the transmission , even better decoupled. The material properties of the elastic layer also advantageously effect a vibration damping.

In another development, instead of a layer of an elastic material on the first and / or the second contact surface also a disc may be provided, which is formed with an elastic material, for example a suitable plastic such as an elastomer. This disc can before inserting the locking element in the Arretierelementaufnahme between the locking element and the motor housing, alternatively or additionally, but also between the locking element and the gear housing, are inserted. In particular, the disc may be designed for placement on an end face of the motor housing. It may be advantageous to take into account the thickness of the disc in the positioning of the retaining recesses with respect to the Arretierelementaufnahme. This disc may also be formed, for example, circular with a central opening for the passage of a motor shaft, in particular if it is a motor housing with a circular cross-section. Such a disc instead of an elastic coating can be advantageous in terms of a simple production of the locking element and on the formation of variants of the engine-transmission arrangement - for example, versions with and without vibration decoupling of transmission housing and motor housing by an elastic intermediate element prove.

In another embodiment of the invention, the locking element forms a portion of a gear housing cover. This makes it possible to combine two functions, namely the elimination of the axial clearance of the motor housing relative to the gear housing on the one hand and the closing of the gear housing on the other hand in a single component. Thus, the number of components is reduced, the assembly thus accelerated and simplified and achieved a lower-cost engine-gearbox arrangement.

In one embodiment, the locking element can be latched to the transmission housing. In particular, the locking element can be provided for this purpose with elastically bendable latching hook, which can be brought into engagement with corresponding recesses or projections of the gear housing. In another embodiment, the gear housing may be provided with elastic latching hook, which can be brought into engagement with recesses, openings or projections of the locking element. This allows a simple yet reliable securing of the locking element in its position in the Arretierelementaufnahme. This can also be ensured that the locking element remains permanently in the Arretierelementaufnahme and there ensures that the transmission housing and the motor housing to each other in a defined axial position and have no axial play with each other.

In a further embodiment of the invention, the gear housing cover locking means, by means of which the gear housing cover is latchingly fastened to the transmission housing. Additionally or alternatively, locking means may be provided on the transmission housing, which are also designed for a latching fastening of the transmission housing cover to the transmission housing. As a result, the assembly of the engine-transmission arrangement is further facilitated. On the one hand, the locking means may already be sufficient for fixing the gear housing cover to the transmission housing. In one variant, the locking means may also be provided only for a provisional positioning of the gear housing cover to the gear housing and a temporary attachment of the two components together, while the final connection both by means of further fasteners, for example by means of screws.

According to one embodiment of the invention, the Arretierelementaufnahme is arranged along the axial direction of the motor housing receptacle subsequently. In this embodiment, the locking element receiving an inner bearing surface for a concern of the second contact surface of the locking element. This makes it possible to position the locking element so that it rests after insertion into the Arretierelementaufnahme on the connecting portion of the motor housing and the inner abutment surface of the Arretierelementaufnahme. As a result, a space-saving and compact construction of the engine-transmission arrangement can be achieved.

In another embodiment of the invention, the inner contact surface faces an end face of the motor housing received in the motor housing receptacle and extends inclined thereto. The end face of a motor housing already provides without additional measures a sufficiently large area in order to apply a force to the motor housing by means of the locking element. The inclined to the end face of the motor housing inner contact surface allows the application of an axial force by a wedge effect, which must be used during assembly by the fitter only low assembly forces when inserting the locking element.

According to one embodiment of the invention, an angle enclosed by the inner contact surface of the gear housing and the end face of the motor housing accommodated in the motor housing receptacle essentially corresponds to an angle enclosed by the first contact surface and the second contact surface of the locking element. In this way, it is possible to achieve contact with the first contact surface on the end face of the motor housing and the second contact surface on the inner contact surface of the locking element mount as completely as possible.

In another embodiment of the invention, the holding recess is on a received in the motor housing housing engine housing inner surface of the Motor housing receptacle arranged. This allows a very simple design of the connecting portion of the motor housing and provided there at least one retaining projection.

According to a preferred embodiment of the invention, the retaining recess on a fixing lug, which is arranged such that it prevents rotation of the motor housing in the motor housing receptacle against the closing direction of the bayonet closure, when the first contact surface of the locking element on the motor housing and the second bearing surface of the locking element rest against the gearbox housing. In this development, the locking element used thus not only prevents axial play of gear housing and motor housing, but also ensures that the bayonet-type connection of the gear housing and the motor housing can not solve by itself. In this way, a particularly reliable way of attaching the motor housing to the transmission housing and thus a special reliable engine-transmission arrangement is created.

According to one embodiment, the motor housing receptacle is surrounded by an annularly closed wall, in particular a hollow cylinder section. Such a motor housing receptacle is particularly well suited for receiving a cylindrical motor housing and is also particularly stable and resilient under mechanical considerations.

According to a further embodiment, the wall thickness of the wall of the motor housing receptacle, in particular in the region of the retaining recesses, at least three times a height of the retaining projection or the plurality of retaining projections, measured from the outer surface of the motor housing. As a result, a sufficient mechanical strength of the wall of the motor housing receptacle can be ensured even in the region of the retaining recesses.

In a further embodiment it is provided that the motor housing has a plurality, in particular three, retaining projections, which are arranged in particular uniformly spaced along a circumference of the motor housing. This makes it possible, between the motor housing and the transmission housing acting forces, in particular forces along the axial direction of the motor housing, reliably and evenly distributed. The durability of the connection can be improved in this way. Furthermore, thereby tilting of the motor housing relative to the transmission housing can be avoided.

In a preferred embodiment of the invention, the motor housing is designed as a housing of an electric motor. In particular, the electric motor may be a DC motor.

In a development, the motor housing is substantially cylindrical, in particular circular cylindrical, formed. The connecting portion may be formed in this development simply as an axial portion in the region of one end of the motor housing.

In a preferred embodiment, the gear housing or the gear housing cover or both are each made of a plastic with suitable mechanical properties, wherein in particular plastic reinforcing fibers can be embedded. In this embodiment, the gear housing and / or the gear housing cover can advantageously be produced inexpensively and yet with suitable mechanical properties by an injection molding.

In a further preferred embodiment, the motor housing is made of metal. A motor housing made of metal, for example made of sheet steel, is suitable for generating the retaining projections by plastically deforming the wall of a motor housing blank, for example by cold forming of these.

The above embodiments and developments can, if appropriate, combine with each other as desired. Further possible refinements, developments and implementations of the invention also include combinations, not explicitly mentioned, of features of the invention described above or below with regard to the exemplary embodiments. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

The present invention will be explained in more detail with reference to the exemplary embodiments indicated in the schematic figures of the drawings. It shows:

1 a schematic representation of a motor housing according to a first embodiment of the invention in a side view;

2 the motor housing the 1 in an end view;

3a a schematic representation of a transmission housing according to the first embodiment of the invention in a side view;

3b a detailed view of a portion of an inner surface of the motor housing receptacle of the transmission housing of 3a ;

4a a schematic representation of a locking element for insertion into the transmission housing of 3a in a side view;

4b the locking element of 4a in an end view;

5a a schematic view of an engine-transmission arrangement according to the first embodiment of the invention in the assembled state, in a side view;

5b a detailed view of the engine-transmission arrangement of 5a in a section YY, wherein only the cut parts of the wall of the motor housing receptacle and the retaining projection are shown;

6 an apparatus for manufacturing a motor housing for a motor-gear assembly according to the first embodiment of the invention and an illustration of a method of manufacturing the motor housing according to the first embodiment of the invention;

7a a transmission housing cover according to a second embodiment of the invention in a first perspective view;

7b the gear housing cover the 7a in a second perspective view;

8a a transmission housing according to the second embodiment of the invention in a first perspective view;

8b the gearbox of 8a in a second perspective view;

9 a part of a motor housing according to the second embodiment of the invention in a perspective view;

10 the transmission housing according to 8a . 8b and the transmission housing cover according to 7a . 7b in a assembled and locked state, in a perspective view;

11 the transmission housing, the gear housing cover and the motor housing according to the second embodiment of the invention before the assembly of the engine-gearbox assembly, in a side view;

12a the transmission housing, the gear housing cover and the motor housing after performing a first assembly step in a state which on the state of 11 follows, in an end view;

12b the transmission housing, the gear housing cover and the motor housing in the state of 12a in a side view;

12c a sectional view of the transmission housing and the motor housing in the state of 12a in the section plane A'-A 'according to 12a ;

13a the transmission housing, the gear housing cover and the motor housing after performing a second assembly step in a state which on the state of 12a -C follows, in an end view;

13b the transmission housing, the gear housing cover and the motor housing in the state of 13a in a side view;

13c a sectional view of the transmission housing and the motor housing in the state of 13a in the section plane BB according to 13a ;

14 the transmission housing, the gear housing cover and the motor housing in the state of 13a in a plan view;

15 the transmission housing, the gear housing cover and the motor housing in the state of 13a in a sectional view in the sectional plane B2-B2 according to 14 ;

16a the gear housing, the gear housing cover and the motor housing of the engine-transmission assembly according to the second embodiment in an assembled state, which on the state of 13a -C follows, in an end view;

16b the transmission case, the transmission case cover and the motor housing of the engine-transmission assembly in the assembled state of 16a in a side view;

16c a sectional view of the transmission housing and the motor housing in the state of 16a in the sectional plane CC according to 16a ;

17 the transmission case, the transmission case cover and the motor housing of the engine-transmission assembly in the assembled state of 16a in a plan view;

18 the transmission case, the transmission case cover and the motor housing of the engine-transmission assembly in the assembled state of 16a in a sectional view in the sectional plane C2-C2 according to 17 ;

19a an apparatus for producing the motor housing for the engine-transmission arrangement according to the second embodiment of the invention, with three tool jaws, in an end view, before carrying out a deformation process of the motor housing;

19b the device of 19a in addition, a mandrel was inserted centrally between the tool jaws and the motor housing was deformed to form retaining projections; and

19c the three tool jaws and the mandrel of the device according to 19b ,

In the figures of the drawing are identical and functionally identical elements, features and components - unless otherwise stated - each provided with the same reference numerals.

The 1 shows a motor housing 1 a motor of a motor-gearbox assembly according to a first embodiment of the invention, in a schematic representation. The engine-transmission arrangement can in particular serve to drive an adjusting device in a motor vehicle. The motor housing 1 is formed in particular as a housing of a DC electric motor and comprises in the embodiment shown a preferably substantially circular cylindrical housing body, which can be seen here in a side view. The reference symbol A denotes the axial direction, this coincides with the longitudinal axis of the motor housing. From this housing body protrudes, as in 1 exemplified, along the axial direction A one end of a motor shaft 2 of the engine. The motor shaft 2 may be formed at this end in any known manner for being positively connected, for example, with components of a motor downstream of the transmission for transmitting torque. This in 1 shown motor housing 1 has a connecting section in the region of its right end 3 on. At the connection section 3 are several, here three, in a radial direction R of the motor housing 1 extending, preferably similar retaining projections 4 intended. The number of holding projections 4 may vary depending on the mechanical requirements of the connection and therefore be greater or less than three. The retaining projections 4 For example, they may be formed as substantially cuboid elevations, preferably with rounded edges, which, measured in the radial direction R, the height 4h over an outer surface 5 of the motor housing 1 exhibit. The length of the retaining projections 4 in the circumferential direction of the motor housing 1 is here by the reference numeral 4a , the extension of the retaining projections 4 in the axial direction by the reference numeral 4b designated. The retaining projections 4 are limited by a plurality of surfaces, wherein the pointing away from the end of the motor shaft axial boundary surfaces by the reference numeral 6 are provided. Although an embodiment of the retaining projections 4 advantageous in this way, the retaining projections 4 for example, be shaped in the form of hemispherical or halbellipsoidförmiger surveys.

How out 1 can be seen, the engine housing 1 an end face 7 on. Through this face 7 protrudes in the middle of the motor shaft 2 , The retaining projections 4 have a distance along the axial direction A. 4x from the frontal area 7 measured from the axial boundary surfaces 6 ,

2 shows an end view of the motor housing 1 of the 1 , In this embodiment, the retaining projections 4 evenly along the circumference of the motor housing 1 spaced apart. There are in 2 three holding projections 4 provided so that an angle W of 120 degrees between the retaining projections 4 results.

In 3a is a gearbox 8th the engine-transmission assembly according to the first embodiment of the invention shown schematically in a side view. The gearbox 8th has a motor housing receptacle 9 on. The motor housing receptacle 9 is formed such that in it the connecting portion 3 of the motor housing 1 is receivable. For this purpose, the motor housing receptacle 9 preferably to the dimensions and the cross-sectional shape of the connecting portion 3 of the motor housing 1 customized. For example, the motor housing receptacle 9 from a ring-shaped closed wall section 33 of the gearbox 8th be limited. How out 3a is still apparent, is the motor housing receptacle 9 in the range of a male motor housing 1 facing inner surface 11 with a holding recess 10 fitted. Furthermore, the transmission housing 8th a Arretierelementaufnahme 19 on, which is attached to the motor housing receptacle 9 followed. The locking element holder 19 is in the view of 3a represented by their hidden edges here in dashed lines. It has an inner contact surface 22 and another boundary surface 23 on. The boundary surface 23 is the motor housing receptacle 9 adjacent and also defines an insertion opening 19a the Arretierelementaufnahme 19 , In particular, the boundary surface 23 opposite the inner contact surface 22 inclined at an acute angle V '.

3b shows the in 3a designated view XX on the inner surface 11 the motor housing receptacle 9 in detail. The retaining recess 10 , which in the example shown one of three retaining recesses 10 is configured such that an associated one of the retaining projections 4 of the motor housing 1 according to 1 after the manner of a bayonet lock with the retaining recess 10 can be brought into positive engagement. How out 3b can be seen, the holding recess 10 be designed for example L-shaped. The dimensions of the holding recess 10 are in 3b with the reference numerals 10a . 10b and 10x designated. Here, the dimension corresponds 10a the retaining recess 10 in the circumferential direction preferably the dimension 4a the retaining projection 4 plus a small surcharge, for easy insertion of the retaining projection 4 in the holding recess 10 to ensure. The distance 10x is preferably slightly less than the distance 4x the retaining projection 4 from the frontal area 7 of the motor housing while the dimension 10b preferably slightly larger than the axial width 4b the retaining projection 4 ,

In the 3a designated wall thickness 33h the Wall 33 is preferred for a favorable mechanical strength, in particular in the region of the retaining recesses 10 at least three times the radial dimension 4h the retaining projections 4 ,

The 4a and 4b show a locking element 16 for a motor-gear arrangement according to the first embodiment. The locking element 16 has a first contact surface 17 and a second contact surface 18 on, with the first contact surface 17 opposite the second contact surface 18 inclined at an acute angle V. The angle V preferably corresponds substantially to that in FIG 3a designated angle V '.

5a shows the engine-transmission assembly according to the first embodiment in an assembled state schematically in a side view. While that too in 3a shown hidden edges of the motor housing receptacle 9 and the Arretierelementaufnahme 19 shown in dashed lines, is the motor shaft 2 in 5a not shown. For example, it protrudes from the face 7 in the gearbox 8th into and is there with components of a transmission, such as a pinion, in a torque transmitting connection. In 5b is a sectional view in the sectional plane YY shown in detail, with only the cut portion of the wall 33 and the retaining projection 4 are shown.

To the retaining projections 4 with the retaining recesses 10 to engage, the connecting portion 3 in the direction of the arrow 12 (see also 3a ) in the motor housing receptacle 9 introduced, with the motor housing 1 is aligned such that the retaining projections 4 each in the axial section 13 the associated holding recess 10 ( 3b ) can be introduced. After complete insertion of the retaining projections 4 in the axial sections 13 are the retaining projections 4 at the axial limit 14 the retaining recesses 10 at. Then the motor housing 1 rotated by a certain angle about the axial direction A, so that the retaining projections 4 along the sections in the circumferential direction 15 the retaining recesses 10 ( 3b . 5b ) move.

After insertion of the locking element 16 in the Arretierelementaufnahme 19 in the direction of the arrow 20 lies the first contact surface 17 of the locking element 16 on the motor housing 1 at. At the same time lies the second contact surface 18 on the gearbox 8th at. As 5a shows, lies the first contact surface 17 at the frontal area 7 of the motor housing 1 while the second contact surface 18 on the inner contact surface 22 is applied. In the state shown, the end face extend 7 and the boundary surface 23 substantially parallel to each other and perpendicular to the axial direction A. In this way, by the locking element 16 exerted a force which causes the transmission housing 8th preferably slightly against the motor housing 9 is tense. A movement of the motor housing 1 opposite the gearbox 8th along the axial direction A after insertion of the locking element 16 in the Arretierelementaufnahme 19 is thus prevented. At the same time passes through the insertion of the locking element 16 the axial boundary surface 6 each of the retaining projections 4 in contact with the gearbox 8th away axial limitation 21 the retaining recess 10 , The gearbox 8th and the motor housing 1 are thus defined in a defined position to each other.

In 6 is a device 100 for producing a motor housing 1 for a motor-gear arrangement according to the first embodiment of the invention shown schematically. The production of the motor housing 1 takes place starting from a motor housing blank 103 , which has an open end 116 having. The device 100 has an outside tool 101 which is adapted to a section 102 a motor housing blank 103 to enclose along its circumferential direction. This outside tool 101 also has an inner surface 104 on. The surface 104 is with a series of wells 105 whose shape is in each case substantially an outer contour of a on the motor housing blank 103 to be generated retaining projection 4 to form a finished motor housing 1 equivalent. For example, the axial dimension 105b the depression 105 essentially the dimension 4b of retaining projection 4 correspond while the radial dimension 105h or the depth of the depression 105 essentially the height 4h the retaining projection 4 can correspond.

In particular, the number and the respective position of the recesses 105 chosen such that they the desired number and respective position of the retaining projections 4 on the motor housing to be produced 1 correspond.

Furthermore, the device 100 one through the open end 116 in an interior 106 of the motor housing blank 103 insertable interior tool 107 on. The interior tool 107 includes several jaws 108 each with an outer surface 109 and an inner surface 110 , At least one of the cheeks 108 indicates on its outer surface 109 a survey 111 which is designed for this, along with a section 112 a wall of the motor housing blank 103 into the depression 105 to be pressed and thereby the retaining projection 4 to shape. The number of elevations preferably corresponds 111 and their respective position during insertion of the inner tool 107 the number and the respective position of the recesses 105 of the outside tool 101 ,

A tapering thorn 113 with a conically tapering lateral surface, for example 115 is along the axial direction A of the motor housing blank 103 in an associated space 114 between the cheeks 108 or sections of this insertable, as by the arrow 117 indicated. By inserting the spike 113 reaches its lateral surface 115 in contact with the inner surfaces 110 the baking 108 , Due to the tapered design of the thorn 113 and a preferably also tapered and in particular by a suitable choice of the surfaces 110 to the shape of the spine 113 adapted space 114 is when driving the spine 113 in the direction of the arrow 117 in the radial direction R of the motor housing blank 103 exercised a force. This force causes the jaws to spread apart 108 in the radial direction R, causing the elevations 111 each together with an associated section 112 the wall of the motor housing blank 103 for forming the at least one retaining projection 4 on the cheeks 108 is exercised. Deformation of the wall of the motor housing blank 103 can be done in particular without heating the same, in other words, the retaining projections 4 can by cold forming the wall of the blank 103 be generated.

According to a second embodiment of the invention, a motor-gear arrangement is provided, which comprises a motor housing 1 , a gearbox 8th and a transmission case cover 24 includes. The engine-transmission assembly according to the second embodiment further includes all the features of the engine-transmission assembly according to the first embodiment.

In 7a is a gearbox cover 24 according to the second embodiment of the invention in a first perspective view, in 7b shown in a second perspective view. Part of the gearbox cover 24 forms a locking element 16 , which is in U-shape with two arms 25 and one between the poor 25 arranged recess 26 is trained. The recess 26 is for a motor shaft 2 provided, as will be described in detail later. The two arms 25 stand by a cover plate 27 down from. A flat surface of U-like design forms the first contact surface 17 of the locking element 16 ,

On one back of each of the two arms 25 is a rib-like structure 28 educated. A substantially straight, but to the first contact surface 17 preferably at an acute angle inclined boundary surface of the rib-like structure 28 forms the second contact surface 18 ,

Further, on the transmission housing cover 24 Locking means may be provided which a latching fastening the gear housing cover 24 on the gearbox 8th enable. In the in the 7a and 7b shown gear housing cover 24 is the locking element 16 , which is a section of the gearbox cover 24 forms, with an opening 31 provided, whose sides with locking lugs 30 are equipped. The opening 31 is intended, the passage of (described below) locking elements 32 of the gearbox 8th for securing the gear housing cover 24 on the gearbox 8th to enable. At a the locking element 16 opposite side of the cover plate 27 extends a locking element 29 , which has the shape of an elastically resilient tongue with a latching hook at the end, down. Also the locking element 29 serves for latching fastening of the gearbox housing cover 24 on the gearbox 8th ,

The gearbox housing cover 24 is preferably as in the 7a . 7b shown with the locking element 16 made in one piece. For this purpose, for example, a suitable plastic can be used, wherein the plastic and reinforcing fibers can be added to achieve desired mechanical properties. The manufacture of the gear housing cover 24 can be done advantageously by an injection molding.

The 8a and 8b show a gearbox 8th an engine-transmission arrangement according to the second embodiment of the invention in a first and a second perspective view.

The gearbox 8th of the 8a . 8b has a motor housing receptacle 9 for receiving an associated connection portion 3 one (in 8a . 8b not shown) motor housing 1 on. The motor housing receptacle 9 is in the second embodiment of the invention by a preferably circular closed wall 33 limited. On an inner surface 11 the Wall 33 in other words, the inner surface 11 the motor housing receptacle 9 , are retaining recesses 10 intended. The retaining recesses 10 are made of the material of the wall 33 recessed, wherein in the embodiment shown, the wall 33 in the area of the retaining recesses 10 not broken, but a wall section 34 reduced wall thickness remains. The retaining recesses 10 themselves are formed in the same manner as described above with respect to the first embodiment of the invention. The retaining recesses 10 have an L-shaped basic shape, so they are with an axial section 13 and a peripheral portion 15 educated. In the same way as already set forth to the first embodiment are retaining projections 4 of the motor housing 1 with the retaining recesses 10 in the manner of a bayonet lock positively engageable. In 8b are three evenly along the circumference of the annularly closed wall 33 arranged retaining recesses 10 shown, the number of retaining recesses 10 and their position along the circumference, however, may vary according to requirements.

The 8a and 8b show further that according to the second embodiment, the transmission housing 8th is provided with locking means. In detail, the transmission housing 8th a pair of locking elements 32 on, which are designed as elastically resiliently receding tongues with a latching hook at their respective end. These locking elements 32 be when putting the gearbox cover 24 of the 7a . 7b on the gearbox 8th with the locking lugs 30 engaged such that the latching hooks the locking lugs 30 engage behind. In addition, the transmission housing 8th also with an opening 35 be provided, which is the implementation of the tongue-shaped locking element 29 of the gear housing cover 24 allows. In particular, the opening 35 formed such that the latching hook of the locking element 29 one the opening 35 surrounding wall when placing the gear housing cover 24 engages behind and thereby the gear housing cover 24 additionally on the gearbox housing 8th is held.

Also the gearbox 8th as it is in the 8a . 8b is shown, is preferably made in one piece of a suitable plastic, for example by injection molding, if necessary, using reinforcing fibers.

In 9 is a section of a motor housing 1 a motor of the engine-transmission assembly according to the second embodiment of the invention in a perspective view. Again, for clarification, one end of the motor shaft 2 shown, the other internal components of the engine are omitted here for the sake of clarity. It is going out 9 seen that also on the motor housing 1 according to the second embodiment, three holding projections 4 are provided uniformly spaced along the circumference of the motor housing.

10 shows a transmission housing assembly, the gear housing cover 24 according to the 7a and 7b as well as the gearbox 8th according to the 8a and 8b includes. The gearbox housing cover 24 is in 10 on the gearbox 8th fitted, wherein the locking element 29 of the gear housing cover 24 through the opening 35 and the locking elements 32 of the gearbox 8th through the opening 31 to grab. The gearbox 8th and the transmission case cover 24 are thus fastened to one another in a latching manner. Further, in the assembled state of 10 the poor 25 of the locking element 16 in the Arretierelementaufnahme 19 (in 8a indicated). In this case, the second contact surface 18 of the locking element 16 against an inner contact surface 22 (in 8b provided with reference numeral) of the Arretierelementaufnahme 19 while the first contact surface 17 of the locking element 16 to a boundary surface 23 the Arretierelementaufnahme 19 points (see also 8a ).

The 11 shows a motor-gear arrangement according to the second embodiment of the invention before the start of assembly in a side view. The gearbox housing cover 24 is above the gearbox 8th shown, since it from above, that is substantially perpendicular to the axial direction A, on the transmission housing 8th to be set up. Here are the arms 25 of the locking element 16 in the Arretierelementaufnahme 19 be introduced. The motor housing 1 is laterally to the right of the gearbox 8th shown in a position in which it in the motor housing receptacle 9 which of the annular closed wall 33 is delimited, can be introduced. These were the retaining projections 4 already aligned by turning the motor housing so that their positions of the respective position of the axial section 13 the associated holding recess 10 , in the 11 is not visible corresponds. In the state shown before the start of assembly, the axial direction A also coincides with the Axle of the substantially formed as a hollow cylinder wall 33 together.

Thus, in 11 a motor housing 1 , a gearbox 8th according to the 8a . 8b and a locking element 16 , which in this embodiment, a portion of the transmission housing cover 24 according to the 7a . 7b forms, but may also be provided separately from this, provided for a first assembly step.

The 12a . 12b and 12c now show the gearbox 8th , the gearbox housing cover 24 and the motor housing 1 after execution of a first assembly step in a state which on the state of 11 follows. The condition of

12a -C is reached, in which the motor housing 1 in the axial direction A in the motor housing receptacle 9 , bounded by the wall 33 , is inserted. In this case, the retaining projections 4 in the respective axial sections 13 (The first legs of the L-shape of the retaining recesses 10 ) of the respectively associated retaining recesses 10 inserted. This is in detail in the section A'-A 'of 12c shown.

In the 13a . 13b and 13c are the gearbox 8th , the transmission housing cover 24 and the motor housing 1 after execution of a second assembly step in a state which depends on the state of 12a -C follows, shown. To achieve the state of 13a -C becomes the motor housing 1 opposite the gearbox 8th twisted by a predetermined angle such that the retaining projections 4 with the associated retaining recesses 10 in the manner of a bayonet lock engage positively. Like the cut BB the 13c shows, the retaining projection became 4 in the associated holding recess 10 in the circumferential direction along the circumferentially extending portion 15 the retaining recess 10 (ie along the second leg of the L-shape) moves. The motor housing 1 can no longer in the axial direction A from the motor housing receptacle 9 be pulled out. However, as well as stays 13c shows, a possibility of movement of the retaining projection 4 in the axial direction A. Also turning back the motor housing 1 is still possible in this mounting state.

In 14 are the gearbox 8th , the transmission housing cover 24 and the motor housing 1 in the state of 13a shown in a plan view. 15 shows a section through the transmission housing 8th , the gearbox housing cover 24 and the motor housing 1 in the section plane B2-B2, as in 14 designated. Out 15 it will be apparent that the locking element receptacle 19 along the axial direction A to the motor housing receptacle 9 followed. Furthermore, the Arretierelementaufnahme 19 an inner contact surface 22 on. This is a face 7 of the motor housing 1 facing and for a concern of the second contact surface 18 of the together with the gear housing cover 24 still above the gearbox 8th located locking element 16 intended. In addition, the inner contact surface runs 22 the Arretierelementaufnahme 19 in the state in which the connecting portion 3 in the motor housing receptacle 9 is received, preferably at an acute angle V 'inclined to the end face 7 of the motor housing 1 , The face 7 is substantially perpendicular to the axial direction A.

Based on the state of 15 Then, as a further assembly step, the locking element 16 such in the Arretierelementaufnahme 19 used that the locking element 16 by a concern of the first contact surface 17 on the motor housing 1 and a concern of the second contact surface 18 on the gearbox 8th a movement of the motor housing 1 opposite the gearbox 8th along the axial direction A prevented. In this case, the (not shown here) motor shaft occurs 2 through the recess provided for this purpose 26 , As the 16a -C and 17 and the sectional view in the plane C2-C2 in 18 show, the second contact surface passes 18 of the locking element 16 when pushing in the direction of the arrow 36 ( 15 ) in contact with the inner contact surface 22 the Arretierelementaufnahme 19 , Also the first investment area 17 comes into contact with the face 7 of the motor housing 1 , is applied to this and pushes the motor housing 1 due to the acute angles V and V ', in which the first bearing surface 17 opposite the second contact surface 18 or the inner contact surface 22 opposite the face 7 are inclined ( 18 and 15 ) in the axial direction A back until the retaining projections 4 at the axial limit 21 (for clarity not in 16c , but in 5b indicated by a reference numeral) of the respectively associated holding recess 10 issue. As a result, it can be ensured on the one hand that the transmission housing 8th and the motor housing 1 are attached to each other without play. On the other hand, the motor housing 1 no longer counter to the closing direction of the bayonet lock against the gear housing 8th turn back, as the retaining projection 4 on a fixing nose 37 (see also 8b ), which forms part of the boundary of the holding recess 10 forms, is held back.

As the 15 and 18 also show, corresponds to the acute angle V, which the first contact surface 17 and the second contact surface 18 of the locking element 16 including each other in the Essentially the angle which the inner contact surface 22 and the frontal area 7 of the motor housing 1 in the assembled state with each other form.

By locking the gear housing cover 24 with the gearbox 8th Finally, the assembly process is completed. In this state, in 18 is shown, are gear housing 8th , Motor housing 1 and gear housing cover 24 reliably connected with each other. How out 18 it can be seen, are for the connection no long mounting arms for grasping the motor housing 1 required. Instead, that is from the motor housing receptacle 9 encompassed area of the motor housing 1 , that is the connecting section 3 , relatively small, and over most of the outer surface 5 of the motor housing 1 can easily dissipate a heat generated during operation of the engine, whereby the cooling of the engine can be improved.

In addition, will be off 18 and especially from the 8a and 8b clearly that, for example, an injection mold for manufacturing the gear housing 8th due to the lack of components, which the motor housing 1 encompass widely along the axial direction A, can be made very compact. It will also be out 18 also clear that only at one end of the motor housing 1 in the construction of the engine, the attachment to the transmission housing 8th must be taken into account. A modification of other components, such as one of the end faces, that may be required in other conventional approaches for attaching a motor housing to a transmission housing 7 Opposed brush holder of the engine, is eliminated, so that further costs can be saved.

To the transmission of vibrations between the gearbox 8th and the motor housing 1 can reduce, the first contact surface 17 of the locking element 16 be provided with a layer which is formed with an elastic material, in particular an elastomer. Additionally or alternatively, such a layer may also be on the second contact surface 18 be provided. Furthermore, in a variant of the above-described motor-gear arrangement is provided between the first bearing surface 17 and the frontal area 7 of the motor housing 1 a disc which, for example, the cross section of the motor housing 1 adapted in size and can be formed circular with a central opening to insert. This disc may also be made of an elastic material such as an elastomer for vibration decoupling and vibration damping.

In the 19a . 19b and 19c is a device 100 for producing a motor housing 1 for a motor-gear arrangement according to the second embodiment of the invention. The device 100 has all the features of the above with reference to 6 described device 100 according to the first embodiment.

The device 100 in 19a has an outside tool 101 on. The outside tool 101 is formed substantially cuboid and provided with a circular bore. This hole is designed to be a section 102 a motor housing blank 103 to enclose along its circumferential direction. Through the hole becomes an inner surface 104 of the outside tool 101 educated. The inner surface 104 is, in the same way as to 6 set forth, provided with at least one recess whose shape is substantially an outer contour of one of the motor housing blank 103 to be generated retaining projection 4 equivalent. In the figures 19a -C, the depressions are not visible, but evenly along the circumference of the inner surface 104 distributed to a motor housing 1 with three retaining projections 4 , as in 9 sketched, finished.

In 19a is also an interior tool 107 in an interior 106 of the motor housing blank 103 introduced. The interior tool 107 again has several jaws 108 on. In the embodiment of 19a are three identically formed cheeks 108 intended. At the outer surface 109 each jaw is centrally in the circumferential direction a survey 111 arranged. 19a shows a state of the device 100 , in which a workpiece in the form of, for example, a hollow cylindrical motor housing blank 103 between inner and outer tool 107 . 101 is located, the device 100 but has not yet been put into operation.

In the 19b and 19c is a rejuvenating thorn 113 shown, which along an axial direction A of the motor housing blank 103 into a thorn 113 allocated space 114 between the cheeks 108 or between sections of these jaws 108 can be introduced.

To the device 100 to put into operation and a motor housing 1 to manufacture, becomes the thorn 113 along the axial direction A of the motor housing blank 103 in the gap 114 between the cheeks 108 of the interior tool 107 driven. In this process, the spike arrives 113 with its lateral surface 115 in contact with the inner surfaces 110 (please refer 19a ) of the cheeks 108 and pushes it, as already 6 described, radially outward. This will be the surveys 111 together with a respective assigned section 112 (please refer 19a ) a wall of the motor housing blank 103 in the respective (not visible here) depression 105 of the outside tool 101 pressed. In this case, the material, in particular a metal, which surrounds the wall of the motor housing blank 103 forms, so plastically and in particular cold deformed that the holding projections 4 be formed.

The device 100 can for removing the finished motor housing 1 from the outside tool 101 with a divisible outer tool 101 be provided. This can be the outer tool 101 for example, consist of two parts, which after the driving of the mandrel 113 and forming the retaining projections 4 be taken apart. A possible part level 118 shows 19b but others are of course conceivable. During the manufacturing process, both halves of the outer tool 101 by suitable holding means, which are not shown here for clarity, held together.

Although the invention has been described above with reference to preferred embodiments, it is not limited thereto, but can be modified in many ways without departing from the subject matter of the present invention.

In particular, it is also conceivable to connect the motor housing not only in the region of one of its end faces in the manner according to the invention with a gear housing, but also in the region of both end faces. When the motor is provided with a rotor shaft which exits the motor housing through each of the end faces, the torque provided by the motor can advantageously be transferred to two downstream gears.

Moreover, the locking element need not necessarily form part of a gear housing cover, although this may be advantageous. Instead, the locking element may also be formed as a single component, if the locking element is to be used independently of a possibly existing gear housing cover between the gear housing and the motor housing.

LIST OF REFERENCE NUMBERS

1

motor housing

2

motor shaft

3

connecting portion

4

retaining projection

4a

Dimension in circumferential direction (holding projection)

4b

axial dimension (holding projection)

4h

Height (holding projection)

4x

Distance (holding projection)

5

outer surface (motor housing)

6

axial boundary surface (holding projection)

7

End face (motor housing)

8th

gearbox

9

Motor housing receptacle

10

holding recess

10a

Dimension in circumferential direction (holding recess)

10b

axial dimension (holding recess)

10x

Distance (holding recess)

11

Inner surface (motor housing receptacle)

12

Insertion direction (arrow)

13

axial section (holding recess)

14

axial limitation (holding recess)

15

Section in the circumferential direction (holding recess)

16

locking

17

first contact surface (locking element)

18

second contact surface (locking element)

19

locking element holder

19a

Insertion opening (locking element receiving)

20

Insertion direction (arrow)

21

axial limitation (holding recess)

22

inner contact surface (locking element holder)

23

Boundary surface (locking element holder)

24

Gear housing cover

25

poor

26

recess

27

cover plate

28

rib-like structure

29

Locking element (gear housing cover)

30

Locking nose (gear housing cover)

31

Opening (gear housing cover)

32

Locking element (gear housing)

33

Wall (motor housing receptacle)

33h

Wall thickness

34

wall section

35

Opening (gearbox housing)

36

Insertion direction (arrow)

37

fixing lug

100

contraption

101

outer tool

102

Section (motor housing blank)

103

Motor housing blank

104

inner surface (outer tool)

105

deepening

105b

axial dimension (recess)

105h

radial dimension (recess)

106

Interior (motor housing blank)

107

internal tool

108

to bake

109

outer surface (baking)

110

inner surface (baking)

111

survey

112

section

113

mandrel

114

gap

115

lateral surface

116

open end (motor housing blank)

117

Driving direction (arrow)

118

sublevel

A

axial direction

R

radial direction

V, V '

angle

W

angle

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

• DE 102008047242 A1 [0003, 0003]
• DE 102005030217 A1 [0004]

Claims (17)

Motor-gear arrangement, in particular for driving an adjusting device in a motor vehicle, with a motor housing ( 1 ), which has a connecting section ( 3 ) with at least one retaining projection ( 4 ) having; with a locking element ( 16 ), which has a first and a second contact surface ( 17 . 18 ) having; with a transmission housing ( 8th ), comprising: a motor housing receptacle ( 9 ), in which the connecting section ( 3 ) is receivable and with at least one retaining recess ( 10 ) is provided, with which the retaining projection ( 4 ) is positively engageable in the manner of a bayonet closure, and a Arretierelementaufnahme ( 19 ) into which the locking element ( 16 ) can be used in such a way that, due to the abutment of the first contact surface ( 17 ) on the motor housing ( 1 ) and a concern of the second contact surface ( 18 ) on the transmission housing ( 8th ) a movement of the motor housing ( 1 ) relative to the transmission housing ( 8th ) along an axial direction (A) of the motor housing (FIG. 1 ) prevented. Arrangement according to claim 1, characterized in that the first contact surface ( 17 ) of the locking element ( 16 ) to the second contact surface ( 18 ) of the locking element ( 16 ) inclined and with this in particular includes an acute angle (V). Arrangement according to one of the preceding claims, characterized in that the first ( 17 ) and / or the second ( 18 ) Contact surface of the locking element ( 16 ) are each provided with a layer of an elastic material, in particular an elastomer. Arrangement according to one of the preceding claims, characterized in that the locking element ( 16 ) a portion of a transmission housing cover ( 24 ). Arrangement according to claim 4, characterized in that the gear housing cover ( 24 ) and / or the transmission housing ( 8th ) Locking means ( 29 . 32 ), by means of which the gear housing cover ( 24 ) on the transmission housing ( 8th ) is fastened latching. Arrangement according to one of the preceding claims, characterized in that the locking element receptacle ( 19 ) along the axial direction (A) to the motor housing receptacle ( 9 ) is arranged and an inner contact surface ( 22 ) for a concern of the second contact surface ( 18 ) of the locking element ( 16 ) having. Arrangement according to claim 6, characterized in that the inner bearing surface ( 22 ) of an end face ( 7 ) in the motor housing receptacle ( 9 ) received motor housing ( 1 ) and is inclined to this. Arrangement according to one of claims 6 or 7, characterized in that one of the inner bearing surface ( 22 ) of the transmission housing ( 8th ) and the face ( 7 ) in the motor housing receptacle ( 9 ) received motor housing ( 1 ) included angle (V ') one of the first bearing surface ( 17 ) and the second contact surface ( 18 ) of the locking element ( 16 ) angle (V) substantially corresponds. Arrangement according to one of the preceding claims, characterized in that the retaining recess ( 10 ) on a housing in the motor housing ( 9 ) received motor housing ( 1 ) facing inner surface ( 11 ) of the motor housing receptacle ( 9 ) is arranged. Arrangement according to one of the preceding claims, characterized in that the retaining recess ( 10 ) a fixing nose ( 37 ) which is arranged such that it causes a rotation of the motor housing ( 1 ) in the motor housing receptacle ( 9 ) against the closing direction of the bayonet closure prevented when the first contact surface ( 17 ) of the locking element ( 16 ) on the motor housing ( 1 ) and the second contact surface ( 18 ) of the locking element ( 16 ) on the transmission housing ( 8th ) issue. Arrangement according to one of the preceding claims, characterized in that the motor housing receptacle ( 9 ) by a ring-shaped closed wall ( 33 ), in particular a hollow cylinder section, is surrounded. Arrangement according to one of the preceding claims, characterized in that the motor housing ( 1 ) is formed as a housing of an electric motor, in particular a DC motor. Motor housing ( 1 ) for a motor-gear arrangement according to one of claims 1 to 12, which has a connecting portion ( 3 ) with at least one in a radial direction (R) of the motor housing ( 1 ) extending retaining projection ( 4 ), wherein the retaining projection ( 4 ) for a positive engagement with a retaining recess ( 10 ) a the motor housing ( 1 ) associated motor housing receptacle ( 9 ) of a transmission housing ( 8th ) for receiving the connection section ( 3 ) is designed in the manner of a bayonet closure. Transmission housing arrangement for an engine-transmission arrangement according to one of claims 1 to 12, with a transmission housing ( 8th ), which a motor housing receptacle ( 9 ), in which a connecting section ( 3 ) of an associated motor housing ( 1 ) is receivable and with at least one retaining recess ( 10 ), with which a at the connecting portion ( 3 ) provided retaining projection ( 4 ) is positively engageable in the manner of a bayonet lock; and with a transmission housing cover ( 24 ), which comprises: a locking element ( 16 ) with a first contact surface ( 17 ) and a second contact surface ( 18 ), a locking element receptacle ( 19 ) into which the locking element ( 16 ) can be used such that the first contact surface ( 17 ) on the in the motor housing receptacle ( 9 ) received motor housing ( 1 ) and the second contact surface ( 18 ) on the transmission housing ( 8th ) issue. A method of assembling a motor-gear assembly according to any one of claims 1 to 12, comprising the following steps: providing a motor housing ( 1 ), which has a connecting section ( 3 ) with at least one in a radial direction (R) of the motor housing ( 1 ) extending retaining projection ( 4 ) having; Providing a transmission housing ( 8th ), which one with at least one retaining recess ( 10 ) provided motor housing receptacle ( 9 ) and a Arretierelementaufnahme ( 19 ) having; Providing a locking element ( 16 ), which has a first contact surface ( 17 ) and a second contact surface ( 18 ) having; Recording the connection section ( 3 ) of the motor housing ( 1 ) in the motor housing receptacle ( 9 ) by inserting the motor housing ( 1 ) in the motor housing receptacle ( 9 ) along the axial direction (A) of the motor housing ( 1 ) and turning the motor housing ( 1 ) relative to the transmission housing ( 8th ) by a predetermined angle such that the retaining projection ( 4 ) with the holding recess ( 10 ) engages positively in the manner of a bayonet closure; and inserting the locking element ( 16 ) in the Arretierelementaufnahme ( 19 ) such that the locking element ( 16 ) by a concern of the first contact surface ( 17 ) on the motor housing ( 1 ) and a concern of the second contact surface ( 18 ) on the transmission housing ( 8th ) a movement of the motor housing ( 1 ) relative to the transmission housing ( 8th ) along an axial direction (A) of the motor housing (FIG. 1 ) prevented. Contraption ( 100 ) for producing a motor housing ( 1 ) according to claim 13, with an outer tool ( 101 ), which is adapted to a section ( 102 ) of a motor housing blank ( 103 ) along its circumferential direction, and an inner surface ( 104 ), which with at least one depression ( 105 ) whose shape substantially corresponds to an outer contour of a to the motor housing blank ( 103 ) retaining projection to be produced ( 4 ) corresponds; with a into an interior of the motor housing blank ( 103 ) insertable interior tool ( 107 ) with several jaws ( 108 ) each with an outer ( 109 ) and an inner ( 110 ) Surface, wherein at least one of the jaws ( 108 ) on its outer surface ( 109 ) a survey ( 111 ), which is adapted, together with a section ( 112 ) a wall of the motor housing blank ( 103 ) into the depression ( 105 ) and thereby the retaining projection ( 4 to shape; and with a tapered spine ( 113 ), which along an axial direction (A) of the motor housing blank ( 103 ) into an associated space ( 114 ) between the jaws ( 108 ) is insertable, wherein the mandrel ( 113 ) with the inner surfaces ( 110 ) of the cheeks ( 108 ) is engageable in such a way that in a radial direction (R) of the motor housing blank ( 103 ) a force for forming the retaining projection ( 4 ) on the cheeks ( 108 ) is exercised. A method of manufacturing a motor housing according to claim 13, comprising the following steps: providing a device ( 100 ) according to claim 16, which with an outer tool ( 101 ), an interior tool ( 107 ) and a thorn ( 113 ) is provided; Providing a motor housing blank ( 103 ) with an open end ( 116 ); Inserting the motor housing blank ( 103 ) into the outer tool ( 101 ) such that the outer tool ( 101 ) a section ( 102 ) of the motor housing blank ( 103 ) encloses in the circumferential direction; Inserting the inner tool ( 107 ) through the open end ( 116 ) in an interior ( 106 ) of the motor housing blank ( 103 ); Insertion of the spine ( 113 ) along an axial direction (A) of the motor housing blank (FIG. 103 ) into the space ( 114 ) between the jaws ( 108 ) of the inner tool ( 107 ), whereby the thorn ( 113 ) with the inner surfaces ( 110 ) of the cheeks ( 108 ) reaches the plant, the jaws ( 108 ) by inserting the mandrel ( 113 ) are pressed radially outward, the survey ( 111 ) together with a section ( 112 ) a wall of the motor housing blank ( 103 ) into the depression ( 105 ) of the external tool ( 101 ) is pressed and thereby the retaining projection ( 4 ) forms.

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