DE202006001250U1 - Pre-assembled drive unit for an adjustable functional element in a motor vehicle - Google Patents

Abstract

preassembled Drive unit for an adjustable functional element in a motor vehicle with a Drive motor (1) and a braking device (2), wherein a drive connection (3) for Provision of the driving force or drive torque of the drive motor (1) and a brake connection (4) for providing the braking force or the braking torque of the braking device (2) are provided.

Description

The The invention relates to a preassembled drive unit for an adjustable Functional element in a motor vehicle according to claim 1 and a drive with such a drive unit according to claim 27.

The in question drive unit is in the context of motor Adjustment of functional elements used in a motor vehicle. Such a drive unit may for example be part of a Drive for a flap, a lid, a hood, a side door, one sliding door o. The like. Be a motor vehicle.

A known drive for a motor vehicle door or flap ( DE 20 2004 016 542 U1 ) is equipped with a drive motor which is coupled to a planetary gear. The motor shaft of the drive motor is connected in an alternative to the sun gear of the planetary gear. In this case, a braking device is provided, by means of which the ring gear of the planetary gear is braked. The output here represents the planet carrier of the planetary gear.

adversely in the known drive is the fact that the structure is not very compact is and requires a high installation effort. Furthermore, it is a modular Structure of the drive with the components used there hardly possible.

Of the Invention is based on the problem, the components of the drive such and further develop that a simple assembly and a modular and compact design is guaranteed.

The above problem is with a pre-assembled drive unit the features of claim 1 solved.

With "pre-assembled" drive unit is meant in the present case that the Drive unit be completed separately from the drive otherwise can and during assembly only via a corresponding mechanical Interface must be connected.

Essential is now the consideration a drive motor on the one hand and a braking device on the other in a preassembled drive unit summarize. It is it has been recognized that the Drive function and the brake function often at almost the same Job must be provided. An example of this was given in the introductory part of the description, in which the Sun gear of the planetary gear driven and the ring gear of the To slow planetary gear is.

It is now a drive connection to Provision of the driving force or the drive torque of the drive motor for one to be driven component and a brake port for providing the braking force or the braking torque of the braking device for a component to be braked intended.

there the component to be driven may already have the functional element, which should be adjusted by motor. But it can also be that it is at the driven component to the drive side of a clutch or a transmission, which then on the output side with the drive element is coupled in terms of drive technology.

A Brake function can in the present context, on the one hand to the mechanical Actuation of a clutch can be used. An example of this is the above-described braking of the ring gear of a planetary gear, whose sun gear is driven. The brake function can also serve to brake the adjustment of the functional element itself. This corresponds to the braking function in the usual sense.

The to be driven component, the component to be braked and the functional element in above be different components, if necessary, the drive technology over a Gear, a clutch o. The like. Are coupled together. In particular applications but it can also be provided that the component to be driven, the component to be braked and the functional element in the above sense partly identical.

at the preferred embodiments according to claims 2 and 3 are at the drive terminal and the brake connection to rotatory Connections, which are associated with a drive shaft or a brake shaft.

Especially compact is the preferred embodiment according to claim 5. Here is the Brake shaft designed as a hollow shaft, which in more preferred Embodiment is penetrated by the drive shaft. But it can also be provided that the drive shaft and the brake shaft, so to speak, one behind the other are arranged. The permeated design is with regard to the achievable compactness optimal.

In the preferred embodiment according to claim 18, the drive shaft on the one hand and the brake shaft on the other hand are coupled to associated elements of a planetary gear. As a result, the drive unit has been supplemented by the function of a clutch, which can be controlled by the braking device. It is particularly advantageous if the hollow shaft of the brake device (An Award 5) associated with the ring gear of the planetary gear, preferably connected to this. It may even be the case that the configured as a hollow shaft brake shaft is identical to the ring gear of the planetary gear. Preferably, the sun gear of the planetary gear is coupled to the drive motor. The planet carrier then forms the output.

To another teaching according to claim 27, the independent one Significance becomes, becomes a drive for an adjustable functional element claimed in a motor vehicle having a drive unit in above sense and a downstream spindle-spindle nut transmission having. Such a drive can be especially advantageous for use the motorized adjustment of flaps or doors of motor vehicles. The above-described embodiment of the drive unit according to claims 5 and 18 is particularly advantageous here in terms of a slim design.

Further Details, features, objects and advantages of the present invention will be described below with reference to the drawing of preferred embodiments explained in more detail. In the drawing shows

1 a schematic representation of a proposed preassembled drive unit in a sectional side view,

2 a further proposed preassembled drive unit in a view according to 1 ,

The in the drawing shown pre-assembled drive unit is preferably as part of a drive for an adjustable functional element used in a motor vehicle. Examples of such functional elements in a motor vehicle will be given below.

The drive unit is equipped with a drive motor 1 and a brake device 2 fitted. The drive motor 1 serves the generation of driving force or drive torque, which causes or as a result, an adjustment of the functional element of the motor vehicle. The braking device 2 provides a braking force or a braking torque that can be used in different ways in the present context. This has been explained in the general part of the description. Accordingly, a drive terminal 3 for providing the driving force or the drive torque of the drive motor 1 for a component to be driven 1a and a brake connection 4 for providing the braking force or the braking torque of the braking device 2 for a component to be braked 2a intended.

The component to be driven 1a in the above sense, the functional element may be itself. But it can also be provided that a transmission is interposed, so that the component to be driven 1a the input shaft o. The like. The intermediate transmission is. The component to be braked 2a may be part of a clutch or the component to be driven 1a or the functional element. An example of this will be given below.

It is the representations in 1 and 2 can be seen that in both preferred embodiments, the drive unit is a closed, separately preassembled unit. The assembly of the drive unit is limited to their connection via the drive connection 3 and the brake connection 4 as well as a corresponding mechanical attachment.

In principle, it may be provided that the drive motor 1 generates linear drive movements. In a preferred embodiment, it is such that it is the drive motor 1 is a rotary motor. Accordingly, the drive terminal 3 preferably a drive shaft 5 on, over which the component to be driven 1a can be connected and by means of the drive motor 1 is drivable.

The same applies to the braking device 2 , In principle, it may be that the braking device 2 provides a braking force acting in one direction only. In a preferred embodiment, however, it is such that the braking device 2 provides a braking torque. Accordingly, it is preferably such that the brake port 4 a brake shaft 6 over which the component to be braked 2a is connectable and in befindlichem in a release state braking device 2 freely rotatable and when in a braking state located braking device 2 is slowed down.

Depending on the application, different arrangements of the shaft axes of the drive shaft 5 and the brake shaft 6 advantageous. A particularly universal applicability results from the fact that the shaft axes of the drive shaft 5 and the brake shaft 6 spaced from each other and preferably arranged parallel to each other. this shows 1 , But it can also be provided that the shaft axes of the drive shaft 5 and the brake shaft 6 at an angle to each other, preferably offset by 90 °, are arranged.

A particularly compact design results from the fact that the brake shaft 6 is designed as a hollow shaft. This is in 2 shown. This can achieve that the brake shaft 6 from the preferably designed as a solid shaft An drive shaft 5 is penetrated, as also in 2 shown. By this "nesting" of drive motor 1 and braking device 2 The packing density of the drive unit is particularly high and the required space correspondingly low. Here are the drive shaft 5 and the brake shaft 6 arranged in a particularly preferred embodiment coaxially to each other.

A low assembly cost is expected when the drive connection 3 and the brake connection 4 each having a flange, not shown, and that the two flanges are arranged substantially in one plane, said plane preferably perpendicular to the shaft axis of the drive shaft 5 is aligned. This supports a substantially self-contained design of the drive unit, which in turn leads to a high degree of compactness.

For the design of the drive motor 1 Many variants are conceivable. For example, the drive motor 1 be designed as an electric motor, as a pneumatic motor or as a hydraulic motor, which is a motor shaft 7 having. It is essential that the motor shaft 7 - somehow - with the drive shaft 5 is coupled.

The coupling between the motor shaft 7 and the drive shaft 5 may be provided directly or indirectly. An example of an indirect coupling is that a gearbox between the motor shaft 7 and the drive shaft 5 is switched. Here are all conceivable variants of transmissions applicable. In terms of a compact arrangement, the application of a planetary gear offers here.

The braking device 2 can as active braking device 2 or be designed as a passive braking device. In the active embodiment, the braking device 2 with a brake drive 8th and a brake element 9 equipped with the brake element 9 by means of the brake drive 8th in braking engagement preferably with the brake shaft 6 or one with the brake shaft 6 coupled component can be brought. In the illustrated and insofar preferred embodiments, it is such that the brake element 9 with one on the brake shaft 6 attach brake disc 10 can be brought into engagement. This is the brake element 9 in the drawing to the right deflectable.

In a preferred embodiment, the braking device 2 designed as an electromagnetic braking device. This means that the brake drive 8th preferably comprises an electromagnet and optionally a permanent magnet.

It is particularly advantageous if the braking device 2 in several braking states can be brought, in which it provides different braking forces and braking torques. It may be that the braking device 2 the braking force or the braking torque continuously provides in a wide range. But it is also conceivable a gradual provision of braking force or braking torque.

In a particularly preferred embodiment, which can be realized easily with the drive units shown, is that the braking device 2 in a total of three states, namely in two braking states and in a release state, can be brought.

First, the braking device 2 can be brought into a full braking state in which the braking torque is high. The "high" braking torque is defined by the fact that under normal use, a rotation of the brake shaft 6 not possible.

The braking device 2 is further brought into a semi-braking state in which the braking torque is low. The "low" braking torque is defined by the fact that the rotation of the brake shaft 6 when used as intended and with appropriate torque application is possible.

With regard to the design of the braking device 2 with two braking states and a release state may on the aforementioned German utility model DE 20 2004 016 542 U1 referred to by the Applicant, the content of which is hereby incorporated by reference in its entirety.

In order to increase the compactness of the drive unit further, it is preferably provided, the drive motor 1 and the braking device 2 partly to merge. A fundamental approach for this is that for both the drive motor 1 as well as for the braking device 2 provided magnetic fields in a sense to use multiple times.

In the embodiment of the drive motor 1 As an electric motor, basically any kind of magnetic field is provided for the engine operation, regardless of what type of electric motor it is. In the embodiment of the braking device 2 as an electromagnetic braking device 2 is also provided a magnetic field, here just for the braking operation.

The drive motor 1 on the one hand and the braking device 2 On the other hand, are now configured and arranged so that the above magnetic fields overlap in any case in part and with appropriate design both for the engine operation and for the braking operation can be used. It can Also be provided that completely overlap the magnetic fields, so that in the result only a single magnetic field exists. It is also conceivable that the magnetic field provided for the engine operation is in any case partly identical to the magnetic field provided for the braking operation.

A preferred embodiment is that the drive motor 1 a permanent magnet is assigned and that of the drive motor 1 associated permanent magnet simultaneously the braking device 2 assigned. An example of this is that the drive motor 1 designed as a DC motor, which is permanently energized. This means that the drive motor 1 a fixed permanent magnet is associated, which generates a required for the engine operation magnetic field.

The braking device 2 , in particular the brake drive 8th , is now preferably equipped with an electromagnet with a coil. A current flow through the coil thereby causes an adjustment of the ferromagnetic brake element 9 , In order to be able to provide, for example, the two braking states described above, a permanent magnet is usually provided here, the magnetic field of which also acts as a force on the brake element 9 causes that can be amplified or attenuated by the coil. This can be seen from the above referenced German Utility Model.

In a preferred embodiment, it is provided here that the permanent magnet of the braking device 2 and eliminates the magnetic field of the permanent magnet of the drive motor 1 is being used. This has saved a permanent magnet and space.

But it can also be provided that the drive motor 1 a coil for generating a magnetic field is associated and that the drive motor 1 associated coil at the same time the braking device 2 , in particular the brake drive 8th , assigned. This can be realized particularly easily if it is the drive motor 1 to a DC motor with excitation winding - coil - is.

In the latter embodiments, it is such that the the drive motor 1 associated permanent magnet and / or the drive motor 1 associated coil and the braking device 2 is assigned or are. This is of course also meant in the opposite way. It is essential that a permanent magnet and / or a coil both the drive motor 1 as well as the braking device 2 is assigned or are. If necessary, the permanent magnet and the coil can also be separated from both the drive motor 1 as well as the braking device 2 , for example, between the drive motor 1 and braking device 2 be arranged.

In all variants, the multiple use of a magnetic field by the drive motor 1 on the one hand and the braking device 2 On the other hand, it is advantageous that the multiple-used magnetic field both the drive motor 1 as well as the braking device 2 , in particular the brake drive 8th , penetrates along a straight line. The drive motor 1 and the braking device 2 Both are aligned along this line. This is for example in 2 shown.

In the passive embodiment of the braking device 2 is the braking device 2 not equipped with its own brake drive. It is so that the braking device 2 can be brought by external actuation in a release state and in a braking state. For example, this may be provided for a lever connection or a Bowdenzuganbindung. But it is also conceivable that the external actuation by the drive motor 1 , For example, by the start of the drive motor 1 is feasible. The braking device 2 is then preferably designed as a loop spring, which in a suitable manner with the drive motor 1 engaged. The operation of the braking device 2 through the drive motor 1 is particularly advantageous when the braking device 2 the actuation of a downstream coupling 11 serves.

At the mentioned clutch 11 it is preferably a controllable and more preferably a switchable coupling 11 connected to the drive connection 3 and to the brake connection 4 can be connected or is connected. The arrangement is such that the clutch 11 by means of the braking device 2 is controllable or switchable.

As a clutch 11 in the above sense, a correspondingly connected planetary gear can be provided. This is in 2 indicated. The horizontal dotted lines are in a schematic form for appropriate fasteners.

The planetary gear 11 is in the usual way with the elements sun gear 12 , Planet carrier 13 and ring gear 14 fitted. One of the elements is sun gear 12 , Planet carrier 13 and ring gear 14 with the drive shaft 5 coupled. A second of the elements sun wheel 12 , Planet carrier 13 and ring gear 14 is with the brake shaft 6 coupled. The third of the elements sun wheel 12 , Planet carrier 13 and ring gear 14 serves as an output. The output is generally ge to be adjusted with the functional element of the motor vehicle coupled.

At the in 2 illustrated and so far preferred embodiment is the sun gear 12 with the drive shaft 5 and the ring gear 14 with the brake shaft 6 coupled. The planet carrier 13 serves as an output for the functional element to be adjusted. The component to be driven 1a in the above sense is therefore the sun 12 , the component to be braked 2a By contrast, the ring gear 14 ,

The latter embodiment is particularly advantageous in terms of design when the brake shaft 6 is designed as a hollow shaft, as in 2 shown. The fact that designed as a hollow shaft brake shaft 6 basically already the shape of the ring gear 14 of the planetary gear, here is the coupling between the brake shaft 6 and ring gear 14 especially unproblematic. It may even be provided that the ring gear 14 from the designed as a hollow shaft brake shaft 6 is formed. This has already been mentioned above. The result is a particularly compact arrangement.

The above-mentioned, preferred embodiment of the braking device 2 with two braking states and a release state can in the above embodiment with a preferably configured as a planetary clutch 11 be beneficial. In the full braking state then only the motorized adjustment of the associated functional element is provided. In the release state, the functional element is freely movable, so it can fall, for example in the case of a flap, uncontrolled. For this case, the half-braking state is advantageous in which the functional element is held, but nevertheless, with the application of a corresponding torque, is adjustable. It is assumed that the drive motor 1 or the drive motor 1 and a possibly downstream transmission between the motor shaft 7 and drive shaft 5 , self-locking is designed. Reference may also be made here to the German Utility Model referred to above.

In a further preferred embodiment is a common drive housing 15 or provided a common support frame for the drive unit, which in any case the drive motor 1 and the braking device 2 receives. It is further preferably provided that in the rest of the drive motor 1 and the braking device 2 each have no own housing. This corresponds to the fundamental consideration to design the drive unit as a closed, separately preassembled unit.

For controlling the drive motor 1 and the brake drive 8th an electronic control, not shown, is provided in a preferred embodiment, which advantageously in the drive housing 15 is arranged. This can be achieved that the drive unit forms a self-sufficient unit that provides certain control functions by means of the integrated control. Optionally, the controller may also have a bus communication module, via which the drive unit can then be addressed by a higher-level control.

Depending on the application, it may be advantageous to both the engine operation of the drive motor 1 as well as the braking operation of the braking device 2 to monitor sensory. In terms of a high degree of compactness is preferably the sensory monitoring of the drive motor 1 with the sensory monitoring of the braking device 2 summarized. It is the case that a sensor arrangement for monitoring the drive motor 1 is provided and that the same sensor arrangement for monitoring the braking device 2 is provided.

An example of this is the use of a proximity sensor with the drive shaft 5 on the one hand and with the brake element 9 on the other hand cooperates such that the signals of the proximity sensor information both about the rotation of the drive shaft 5 as well as about the adjustment of the brake element 9 give.

The drive motor 1 and the brake drive 8th are electrically supplied in a preferred embodiment. Then it is advantageous if a combined wiring is provided, which initially reduces the wiring effort. When the supply line of the drive motor 1 and the supply line of the brake drive 8th In addition, there is additional security in case of cable break or failure of one of the two components. It is thus ensured with appropriate design that both the drive motor 1 as well as the brake drive 8th or neither the drive motor 1 nor the brake drive 8th provide or provide the corresponding forces or moments.

In order to simplify the assembly of the drive unit further, contact elements are provided on one side of the drive unit, wherein by means of a common plug o. The like. The contact elements and thus both the drive motor 1 as well as the braking device 2 are contactable. In a preferred embodiment, it is a plug that also ensures the connection of the controller.

It has been pointed out above that the drive unit is preferably part of a drive, not shown in its entirety, in a motor vehicle. In a preferred embodiment, the drive unit is part of a drive a flap, a lid, a hood, a side door, a sliding door o. The like. A motor vehicle. In principle, however, the drive can be assigned to all conceivable functional elements of a motor vehicle. Another example of this is the seat o. The like. Of a motor vehicle.

In a preferred embodiment, the drive is equipped with a spindle-spindle nut gear, which is connected downstream of the drive unit. Especially at the in 2 illustrated embodiment, this leads to a slim version of the drive. The spindle 16 of the spindle spindle nut transmission, which is otherwise not shown, is attached to the planet carrier 13 of the planetary gear 11 coupled. The drive as such is the subject of another teaching, which has its own significance.

Claims (27)

Pre-assembled drive unit for an adjustable functional element in a motor vehicle with a drive motor ( 1 ) and a braking device ( 2 ), wherein a drive connection ( 3 ) for providing the driving force or the drive torque of the drive motor ( 1 ) and a brake connection ( 4 ) for providing the braking force or the braking torque of the braking device ( 2 ) are provided. Pre-assembled drive unit according to claim 1, characterized in that the drive connection ( 3 ) a drive shaft ( 5 ), over which a component to be driven ( 1a ) is connectable and by means of the drive motor ( 1 ) is drivable. Pre-assembled drive unit according to claim 1 or 2, characterized in that the brake connection ( 4 ) a brake shaft ( 6 ), over which a component to be braked ( 2a ) is connectable and the in a Lüftzustandlicher braking device ( 2 ) freely rotatable and in braking state in a braking state ( 2 ) is braked. Pre-assembled drive unit according to claims 2 and 3, characterized in that the shaft axes of the drive shaft ( 5 ) and the brake shaft ( 6 ) spaced apart from each other and are preferably arranged parallel to each other. Pre-assembled drive unit according to claims 2 and 3, characterized in that the brake shaft ( 6 ) is designed as a hollow shaft, preferably, that the brake shaft ( 6 ) from the drive shaft ( 5 ) is penetrated, more preferably, that the drive shaft ( 5 ) and the brake shaft ( 6 ) are arranged coaxially with each other. Pre-assembled drive unit according to one of the preceding claims, characterized in that the drive connection ( 3 ) and the brake connection ( 4 ) each having a flange and that the two flanges are arranged in wesentli Chen in a plane, preferably, that the plane perpendicular to the shaft axis of the drive shaft ( 5 ) is aligned. Pre-assembled drive unit according to claims 2 and 3 and optionally according to one of claims 4 to 6, characterized in that the drive motor ( 1 ) as an electric motor, as a pneumatic motor or as a hydraulic motor with a motor shaft ( 7 ) and that the motor shaft ( 7 ) with the drive shaft ( 5 ) is coupled. Pre-assembled drive unit according to claims 2 and 3 and optionally according to one of claims 4 to 7, characterized in that a transmission between the motor shaft ( 7 ) and the drive shaft ( 5 ) is switched. Pre-assembled drive unit according to claims 2 and 3 and optionally according to one of claims 4 to 8, characterized in that the braking device ( 2 ) a brake drive ( 8th ) and a braking element ( 9 ) and that by means of the brake drive ( 8th ) the braking element ( 9 ) in braking engagement preferably with the brake shaft ( 6 ) or one with the brake shaft ( 6 ) Coupled component can be brought. Pre-assembled drive unit according to one of the preceding claims, characterized in that the braking device ( 2 ) is designed as an electromagnetic braking device, preferably that the brake drive ( 8th ) has an electromagnet and possibly a permanent magnet. Pre-assembled drive unit according to one of the preceding claims, characterized in that the braking device ( 2 ) can be brought into a plurality of braking states in which it provides different braking forces or braking torques. Pre-assembled drive unit according to one of the preceding claims, characterized in that the braking device ( 2 ) can be brought into a full braking state in which the braking torque is high and thereby a rotation of the brake shaft ( 6 ) is not possible and that the braking device ( 2 ) Can be brought into a half-braking state in which the braking torque is low and a Rotation of the brake shaft ( 6 ) is possible under application of a corresponding torque. Pre-assembled drive unit according to one of the preceding claims, characterized in that for engine operation by the drive motor ( 1 ) a magnetic field is provided that for the braking operation by the braking device ( 2 ) A magnetic field is provided and that the two magnetic fields in any case in part, preferably completely, superimpose, or that the intended for the engine operation magnetic field with the intended for braking operation magnetic field is in any case partly identical. Pre-assembled drive unit according to one of the preceding claims, characterized in that the drive motor ( 1 ) is associated with a permanent magnet and that of the drive motor ( 1 ) associated permanent magnet at the same time the braking device ( 2 ) assigned. Pre-assembled drive unit according to one of the preceding claims, characterized in that the drive motor ( 1 ) is associated with a coil for generating a magnetic field and that the the drive motor ( 1 ) associated coil at the same time the braking device ( 2 ) assigned. Pre-assembled drive unit according to one of the preceding claims, characterized in that the braking device ( 2 ) is configured without a brake drive and can be brought by external actuation in a release state and in a braking state, preferably that the external actuation by the start of the drive motor ( 1 ) is feasible. Pre-assembled drive unit according to one of the preceding claims, characterized in that a controllable, preferably switchable clutch ( 11 ) to the drive connection ( 3 ) and to the brake connection ( 4 ) is connected or connected and that by means of the braking device ( 2 ) the coupling ( 11 ) is controllable or switchable. Pre-assembled drive unit according to claims 2 and 3 and optionally according to one of claims 4 to 17, characterized in that a planetary gear ( 11 ) with the elements Sonnenrad ( 12 ), Planet carrier ( 13 ) and ring gear ( 14 ) is provided that one of the elements Sonnenrad ( 12 ), Planet carrier ( 13 ) and ring gear ( 14 ) with the drive shaft ( 5 ) is coupled, that a second of the elements Sonnenrad ( 12 ), Planet carrier ( 13 ) and ring gear ( 14 ) with the brake shaft ( 6 ) and that the third of the elements Sonnenrad ( 12 ), Planet carrier ( 13 ) and ring gear ( 14 ) serves as an output, preferably that the sun gear ( 12 ) with the drive shaft ( 5 ) is coupled, that the ring gear ( 14 ) with the brake shaft ( 6 ) and that the planet carrier ( 13 ) serves as an output. Pre-assembled drive unit according to one of the preceding claims, characterized in that a common drive housing ( 15 ) or a common support frame is provided, the drive motor ( 1 ) and the braking device ( 2 ), preferably, that in the rest of the drive motor ( 1 ) and the braking device ( 2 ) each have no own housing. Pre-assembled drive unit according to one of the preceding claims, characterized in that an electronic control is provided, by means of which both the drive motor ( 1 ) as well as the brake drive ( 8th ) are controllable. Pre-assembled drive unit according to one of the preceding claims, characterized in that a sensor arrangement for monitoring the drive motor ( 1 ) is provided and that the same sensor arrangement for monitoring the braking device ( 2 ) is provided. Pre-assembled drive unit according to one of the preceding claims, characterized in that the drive motor ( 1 ) and the brake drive ( 8th ) are electrically supplied and have a combined wiring, preferably that the supply line of the drive motor ( 1 ) and the supply line of the brake drive ( 8th ) are connected in series. Pre-assembled drive unit according to one of the preceding claims, characterized in that contact elements are provided on one side of the drive unit and that by means of a common plug, the contact elements and thus both the drive motor ( 1 ) as well as the braking device ( 2 ) are contactable. Pre-assembled drive unit according to one of the preceding Claims, characterized in that the Drive unit is part of a drive in the motor vehicle and that the Drive the motorized adjustment of a flap, a lid, a hood, a side door, a sliding door o. Like. Of a motor vehicle is used. Pre-assembled drive unit according to one of the preceding Claims, characterized in that the Drive unit Component of a drive of a seat o. of the motor vehicle. Pre-assembled drive unit according to one of the preceding Claims, characterized in that the Drive has a spindle-spindle nut transmission, that of the drive unit is downstream. Drive for an adjustable functional element in a motor vehicle with a Drive unit and one of the drive unit downstream spindle-spindle nut transmission, wherein the drive unit has the features of one or more of the preceding ones claims having.