DE102007030139A1 - Adjusting drive for moving a functional element in or on a motor vehicle body - Google Patents

Abstract

The invention relates to an adjusting drive for moving a functional element in or on a motor vehicle body, with a drive motor and a reduction gear connected downstream of the drive motor with a gear housing, wherein the reduction gear at least one output-side actuator to which the functional element to be moved is directly or indirectly connectable, and a this actuating element driving drive pinion, wherein the actuating element has a rack or a circular toothed segment, with which the drive pinion meshes, wherein the actuating element and the drive pinion are mounted on the transmission housing, wherein the actuating element, the drive pinion and their bearings by material, design, arrangement and Execution are designed to the occurring during movement of the functional element even under unfavorable circumstances forces and moments and wherein the movement of the actuating element at least in one direction of movement, preferably in both directions of movement is limited by a provided in the reduction gear stop. It is proposed that the stop is formed on the corresponding end of the rack or of the toothed segment itself and blocks the further combing of the drive pinion.

Description

The The invention relates to an adjusting drive for moving a functional element in or on a motor vehicle body with a drive motor and a reduction gear connected downstream of the drive motor, having at least one output-side adjusting element, with the the functional element to be moved directly or indirectly connectable is, and further with the features of the preamble of claim 1.

adjusting drives in or on a vehicle body are for a variety of applications needed. Depending on which functional element is how to move, different The design and interpretation of the adjustment. Especially highly stressed is an adjustment when a heavy Functional element in or on the vehicle body with a unfavorable lever reduction must be moved.

Especially difficult circumstances are in an adjustment for moving a motor vehicle door as a functional element in front. The term "motor vehicle door" is presently comprehensive to understand. This does not only include the side doors of a Motor vehicle, but also a tailgate, a trunk lid, a bonnet or a cargo compartment door and any existing Lifting roof. A motor vehicle door is present as a functional element on a motor vehicle body Thus, such a motor vehicle door is described in this regard not attributed to the vehicle body itself. Corresponding is such a motor vehicle door pivotally hinged or displaceable on the vehicle body attached, in any case, a door opening of the vehicle body thereby lockable is.

One Adjusting drive for moving a lowerable side window in a side door a motor vehicle, commonly referred to as a window regulator, is also an adjusting drive for moving a functional element on a motor vehicle body. In contrast, for example, a Adjustment drive for moving a vehicle seat horizontally Direction or movement of a seat back of a vehicle seat, commonly referred to as seat adjustment, an adjustment for Movement of a functional element in a motor vehicle body.

present it is about an adjustment for moving a functional element in or on a motor vehicle body as such. This one points a reduction gear with a transmission housing. On the gearbox are the output side actuator of the reduction gear, with to which the functional element to be moved can be connected directly or indirectly is, as well as a driving this actuator driving pinion stored. actuator and pinion gears are sort of the basic equipment of this Reduction gear, but without further further gear parts or gear stages, in most cases even will exhibit.

A "transmission housing" in the sense of the teaching of present invention need not Completely be closed. It can also larger or be smaller sections open. Ultimately, it is the reduction gear more or less largely enveloping Carrier, which can fulfill the previously described bearing function.

Of the Drive motor can with in the gearbox of the reduction gear It can also be arranged in a separate housing or more or less open on the gear housing of the reduction gear be attached or otherwise stored.

in the As a rule, an adjustment of the type in question is a complete assembly, when installed in the vehicle body only with the moving element to be moved either directly or indirectly, for example via a push rod, must be connected.

Around to meet its requirements in the operation is in the adjustment to provide that the actuating element, the drive pinion and their bearings according to material, design, arrangement and execution when moving the functional element in operation even under unfavorable circumstances occurring forces and to be able to record moments.

One Adjustment of the type in question has regularly at least an end position, usually two end positions for the opposing one another Movement directions of the adjustment.

In an electric drive motor for the adjustment, it is recommended to reach the end positions in the so-called. Block operation in order to dispense with sensors for detecting the position of the end positions or as an additional security measure. It is provided that the movement of the actuating element is limited by one or in each case a stop at least in one direction of movement, preferably in both directions of movement. By, for example, a torque monitoring, preferably in the form of a current monitoring and / or in conjunction with a timer, there is a shutdown of the electric drive motor after reaching the corresponding end position. Before switching off, the electric drive motor operates at full power the actuator whose further movement is limited by the stop. The stop must therefore withstand the maximum forces and moments. Similar situations occur even when the drive motor is not an electric drive motor but a pneumatic or hydraulic drive.

In principle, the functional element connected to the actuating element could also form the stop for the end position. In particular, when it is in the functional element to a large-scale component in lightweight construction, this can usually not absorb the forces and moments occurring. Accordingly, it is provided in the adjustment drives in question here that the movement of the actuating element is limited by a stop provided in the reduction gear itself. This stop is located on the gear housing of the reduction gear and the actuator is pressed against this stop (for an opening drive of a motor vehicle lock as adjustment for moving a functional element on a motor vehicle body this is disclosed in the DE-A-10 2004 014 551 ).

A Limiting the movement of the actuator by a reduction gear provided stop is also advantageous because the United actuator then in itself completely self-sufficient, for example, even when not installed completely can be tested.

It is self-evident, that the previously explained Function of the stop or the attacks another control of Control element of the adjustment by means of position sensors or the like. does not exclude. The latter is especially for the approach of intermediate positions for the adjustment of considerable Interest.

Adjustment drives of the type in question in the exemplary and particularly interesting embodiment as a tailgate drives are known in various embodiments (see, eg DE-A-102 45 136 ; DE-A-101 17 935 ; DE-U-20 2004 016 543 ). Typical applications in the motor vehicle body are z. B. seat adjustments (eg DE-A-32 14 592 ).

The known adjusting drive, from which the invention concretely proceeds ( DE-U-20 2004 016 542 ), is one for moving a functional element on a motor vehicle body, namely for moving a motor vehicle door, in particular a sliding side door on a motor vehicle body. Here, the features of the preamble of claim 1 of the present patent application are realized.

In addition to the electric drive motor with the downstream, multi-stage Reduction gear, this adjustment has a braking device on that over a planetary gear of the reduction gear with the actual power transmission train is coupled. The brake device has one of which the drive shaft self-propelled drive separate brake drive. This separate Brake drive has in one of the variants realized here a magnetic field generating permanent magnet and an electromagnet on. The magnetic field generated by the permanent magnet causes a Force on the brake in the direction of the braking position. Depending on Polarity of the electromagnet is generated by the permanent magnet Magnetic field weakened or reinforced. This results in a three-stage braking effect between not braked (release position), strongly braked (blocking position) and slightly braked (not energized Intermediate position), in which the tailgate does not simply knock down, but manually can be moved with little effort.

Multistage electromagnetic devices are also used as slip clutches in the power transmission train of reduction gears ( WO-A-03/104671 ).

Around in the adjustment of the type in question at the stop occurring forces and Moments especially in block operation of the electric drive motor to be able to record, that must Stop bearing gear housing accordingly resistant accomplished be. In the prior art, the gearbox is made of this and others establish therefore designed as a steel part with high strength. The adjustment drive in total becomes difficult. If you take lighter and less resistant materials for the Gearbox, that's the way to do it this with extensive, voluminous, especially ribbed Make structures in the area of the stop particularly resistant. This will make the gearbox large. That's common to the for desired the adjustment Installation locations unacceptable.

Of the Teaching is thus the problem underlying the known adjustment for moving a functional element in or on a motor vehicle body so to design and develop that the maximum forces and Moments picking up stop for the actuator is optimally integrated in the reduction gear is.

The aforementioned problem is solved in an adjusting drive with the features of the preamble of claim 1 by the features of the characterizing part of claim 1. The ingenious idea is that the attack on the corresponding End of the rack or the tooth segment of the control element itself is formed and simply blocks the further combing of the pinion.

The Invention goes from consideration from that that Actuator, the drive pinion and their bearings - of course - according to material, Design, arrangement and execution on the occurring when moving the functional element even under unfavorable circumstances personnel and moments is designed. Exactly so already on the occurring forces and Moments designed components and their corresponding massive bearings in the gearbox itself are now synonymous for the blocking used in the end position of the actuating element. Additional measures for the design of the gear housing especially for the stop can therefore omitted. The gearbox can be just as designed and stay as it is for the normal Operation configured when moving the functional element anyway have to be.

preferred Embodiments and developments of the previously explained basic Teaching the present invention are the subject of the dependent claims. These under claims and further preferred embodiments and further developments and Advantages and variants of the invention are described below with reference to Drawing in the description of preferred embodiments explained in more detail. In the drawing shows

1 the rear of a combination motor vehicle with a tailgate as an example of a functional element to be moved on a motor vehicle body,

2 in a schematic representation of the adjusting drive on such a tailgate,

3 A first embodiment of an actuator / pinion combination of an adjustment according to the invention,

4 A second embodiment of an actuator / pinion combination,

5 A third embodiment of an actuator / pinion combination,

6 a particularly preferred embodiment of a complete adjusting drive for moving a tailgate on a motor vehicle body in plan view when opened by removing the housing cover gear housing,

7 the adjustment from 6 , Now removed the overhead ring gear of the planetary gear.

1 shows a motor vehicle body 1 with a tailgate 2 as an adjustable functional element and indicated on the roof frame of the vehicle body 1 an adjustment drive 3 for moving the functional element 2 , so to open and close the tailgate. This adjustment drive 3 is here arranged on one side in the hinge area. The prior art mentioned in the introduction discloses that an adjusting drive of this type can also be arranged centrally, possibly with two power transmission trains can be provided to the right and left or can be arranged twice right and left on the roof frame. This example of the adjustment drive 3 does not limit the disclosure of the present patent application. Rather, it is generally about adjusting drives 3 for movement of functional elements 2 in or on a motor vehicle body.

2 shows dash-dotted the functional element 2 namely, the tailgate on the vehicle body 1 and there the adjustment drive 3 at the bottom of the roof frame. One recognizes a hinge axis 4 and a hinge hanger 5 , At the hinge hanger 5 is a force attack arm 6 arranged at the bottom of a push rod 7 pivotally hinged, which is in the housing of the adjustment 3 ushers. For this power transmission from the adjusting drive 3 on the functional element 2 There are a variety of suggestions in the art, which may be referred to here to avoid repetition.

6 and 7 let a complete adjustment drive 3 recognize according to the teachings of the invention. 3 . 4 and 5 deal only with an essential part of the invention for the adjustment 3 , Therefore, the basic principle of the adjusting drive according to the invention will be described in greater detail with reference to the figures 3 explained.

The adjustment drive 3 initially has a drive motor 8th , here and preferably an electric drive motor 8th on. In principle, it would also be possible to use, for example, a pneumatic or hydraulic drive motor. However, particularly useful are electric drive motors 8th ,

A not shown here output shaft of the drive motor 8th is with a downstream reduction gear 9 coupled drive technology. The reduction gear 9 has a gearbox 10 ( 6 . 7 ), of which in 6 and 7 only a lower, upwardly open shell is shown. The lid is removed.

The gearbox 10 of the reduction gear 9 does not have to be completely closed. It has only the function of the teaching of the invention, the components of the reduction gearbox 9 to wear. A closed gearbox 10 However, it has the advantage of a corresponding moisture protection etc ..

6 and 7 let recognize that in the illustrated embodiment, the transmission housing 10 of the reduction gear 9 the drive motor 8th does not record. Rather, the drive motor 8th by means of a flange plate 11 on the gearbox 10 flanged. Neither part of the gearbox 10 is an electronics housing 12 that the control electronics of the here electromotive adjustment 3 receives. This is outside the gearbox 10 of the reduction gear 9 stated. If necessary, it also houses the control electronics of other position sensors or incremental encoders.

6 and 7 let on the complete adjustment drive 3 detect, 3 . 4 and 5 show in each section that the reduction gear 9 in any case, an output-side actuator 13 having. With the control element 13 acts on a driving pinion driving this 14 together. The functional element to be moved 2 is with the actuator 13 directly or indirectly connectable. In the illustrated and preferred embodiment can be seen in 6 and 7 to the above-mentioned push rod 7 , which then in turn somehow with the functional element 2 to connect.

All variants of the adjusting drive according to the invention 3 is first in common that the actuator 13 a rack 15 ( 4 ) or a circular arc-shaped toothed segment 16 ( 3 and 5 ), with which the drive pinion 14 combs. The actuator 13 is with a bearing axis 13 ' , the drive pinion 14 with a bearing axis 14 ' on the gearbox 10 stored. Here are the actuator 13 , the drive pinion 14 and their camps 13 ' . 14 ' , So the bearing axles in the corresponding bearing in the gearbox 10 , Designed according to material, design, arrangement and design to the forces and moments occurring during movement of the functional element. This should also apply to occurring under unfavorable circumstances forces and moments.

at a tailgate of a motor vehicle unfavorable circumstances are given, for example, if the motor vehicle with inclined vehicle body on a Slope is when very high outside temperatures rule, so that the Gas springs for the tailgate are very strongly biased, or if very low Temperatures prevail, so that the Gas springs show little effect. For others Use cases of Adjustment drive is similar Boundary conditions that lead to particularly high forces and moments, the but still managed Need to become. Naturally there is for it Borders that are in the daily Operation reasonably still to be expected circumstances define, for which the adjustment drive should be functional and should remain.

Based on 3 to 7 can also be found that the movement of the actuating element 13 at least in one direction of movement, preferably in both directions of movement, by a reduction gear 9 provided stop 17 or just several attacks is limited. Essential to the invention is that this attack 17 not on the gearbox 10 of the reduction gear 9 sitting, but that this attack 17 at the - corresponding - end of the rack 15 or the dental segment 16 of the actuating element 13 even trained and simply continuing combing the pinion 14 blocked. This is the blocking of the actuator 13 been moved there with the forces and moments occurring where the design of material, design, arrangement and execution is already made so that even when moving the functional element 2 under unfavorable circumstances occurring forces and moments can be absorbed. Here, for example, has the gearbox 10 at the camp 13 ' . 14 ' already a corresponding design, so that the forces and moments that occur can be absorbed. This then also extends to the forces and moments occurring during blocking or can be interpreted in any case by minor modifications to these forces and moments out. The gearbox 10 does not have to for the stop 17 even be specially designed, especially not particularly difficult or big.

This in 3 illustrated first preferred embodiment shows a first solution for the applies that the stop 17 as widened across a tooth gap, and preferably with a depression 18 with a tooth of the rack provided with a much smaller depth than a tooth gap 15 or the dental segment 16 is executed. You can see that the opposite drive pinion 14 at a well-defined location against the stop 17 with its depression 18 runs, so that further unwinding of the drive pinion 14 is prevented.

At the in 3 illustrated embodiment, a part of the forces occurring when blocking in the direction of the bearing axis 13 ' of the actuating element 13 or in the opposite direction in the direction of the bearing axis 14 ' of the drive pinion 14 , These forces must be in the camp 13 ' . 14 ' be received and are basically directed so that the teeth of the drive pinion 14 with the toothed segment 16 is pressed apart.

At the in 4 and 5 shown Embodiments is therefore provided that the stop 17 ' on the actuator 13 at a distance above the rack 15 or the dental segment 16 in the circle of the teeth of the drive pinion 14 is arranged projecting. In particular, here is that the attack 17 ' on the actuator 13 at a distance above the rack 15 or the dental segment 16 approximately at the height of the bearing axis 14 ' of the drive pinion 14 lies. At any rate, a significant component of force acts tangentially with respect to the actuator 13 and therefore the bearings become 13 ' . 14 ' less burdened.

4 shows an embodiment with a linear or translational to be moved actuator 13 with a rack 15 in engagement with the drive pinion 14 , In contrast show 3 and 5 Embodiments in which the actuating element 13 is pivotally mounted and a circular arc-shaped toothed segment 16 which extends over about 90 ° to about 270 °, preferably about 180 °, with the drive pinion 14 combs.

At the in 5 illustrated embodiment is provided that a stop 17 '' on the actuator 13 at a distance above the rack 15 or the dental segment 16 on the from the rack 15 or the toothed segment 16 opposite side of the drive pinion 14 lies. Here you come to a blocking arrangement between the stop 17 '' and the toothed segment 16 , whereby bearing forces are largely eliminated.

This in 5 illustrated embodiment is characterized in particular by the fact that several attacks 17 . 17 ' . 17 '' at the same end of the rack 15 or here the tooth segment 16 are arranged at different positions and all come into blocking effect. Here the force action directions are indicated, on the one hand between drive pinion 14 and toothed segment 16 itself, on the other hand between the drive pinion 14 and the attacks 17 . 17 ' and 17 '' occur. Of course, there is a static over-determination here. Because the drive pinion 14 but a minimal evasive movement on the sector gear 16 can make and the rest of the overall arrangement has a small inherent elasticity, although at the end of each of the three forces are absorbed, so that there is an optimal distribution of forces on different abutment surfaces.

As 4 It has already been shown that the overall arrangement can also be used as a closed slot 19 run, at one edge then the rack 15 or the toothed segment 16 is trained. This increases the rigidity of the control element 13 ,

In the drawings, it is consistently shown that the stop 17 on the actuator 13 itself is integrally formed. In particular, in the in 3 illustrated embodiment, the broadening with the recess 18 simply on the forged steel part, which is the actuator 13 forms, shaped.

For other applications with lower forces and moments, for example, for windows or seat adjustments, but also for adjusting drives in motor vehicle locking systems or the like., It can be provided that the stop 17 on the actuator 13 attached, in particular molded plastic.

To dampen noise and to realize a "soft" characteristic of the adjustment, it can be provided that the stop 17 a shock-absorbing design, in particular in the form of a coating, is provided. Such a shock-absorbing design, for example, plastic or a thermoplastic elastomer or the like. consist.

The detailed description in the introduction of the problem of the special design of the gear housing 10 to absorb the impact forces, gains special significance when the gearbox 10 made of a material with significantly lower strength than the material of the actuating element 13 and the drive pinion 14 consists. Then it would be necessary that the gearbox 10 for a separate storage of the stop 17 special configurations must learn. These are avoided with the inventive concept.

As has already been stated above, it is recommended in any case for highly loaded adjustment drives, in particular tailgate drives, the actuator 13 and the drive pinion 14 made of steel, in particular of high-strength steel.

Aspects of weight and size make it appear as if the gearbox 10 made of aluminum, magnesium and / or plastic, in particular die cast aluminum parts, Magnesiumdruckgußteilen and / or plastic injection molded parts. In this pairing steel / light metal or plastic is the claim 10 given context that makes the realization of the adjustment according to the invention can be particularly interesting. It has been shown that classic stops in gearboxes 10 made of aluminum, magnesium and / or plastic, in particular a Aluminiumdruckgußgehäuse, for an adjustment of a motor vehicle tailgate simply tear out after a few hundred load changes and the entire adjustment 3 unusable be left.

Here, the concept of the invention provides a convincing remedy in that the already highly resilient elements, namely the actuator 13 and the drive pinion 14 and their camps 13 ' . 14 ' on the gearbox 10 , also for blocking by means of stop 17 be used for one or the other end position.

Already in the introductory part of the description, it has been pointed out that adjusting drives of the type in question in the reduction gear 9 can be equipped with a slip clutch (see, for example, the WO-A-03/104671 ). This is particularly useful when it is an electromagnetically controllable slip clutch with two or, preferably, three coupling stages. Such a variant for the reduction gear 9 is also useful in the teaching of the invention.

That in the 6 and 7 illustrated, particularly preferred embodiment of an adjustment, which is determined and suitable in particular for the high loads when moving a tailgate or a trunk lid on a motor vehicle body, it is provided that the reduction gear 9 an electromagnetically controlled braking device 20 preferably one with two or, preferably, three braking stages. For this, too, there are already considerations in the prior art, to which the introductory mentioned DE-U-20 2004 016 542 may be pointed out.

The illustrated embodiment shows a braking device 20 such that the reduction gear 9 a planetary gear stage 21 and that the braking device 20 by means of the planetary gear stage 21 to the reduction gear 9 otherwise coupled. The illustrated embodiment shows the ring gear 22 the planetary gear stage 21 by means of an additional external toothing with the tickling 23 the brake device 20 combing ( 6 ) while the planet carrier 24 with the drive pinion 14 that with the toothed segment 16 of the actuating element 13 combs, rotatably coupled ( 7 ). The sun wheel is in 6 and 7 Not recognizable, it lies down and is with the drive motor 8th via a worm gear, which is also not visible, coupled. For the operation of this braking device 20 Reference may be made to the cited reference, which, with its disclosure content, also makes the disclosure content of the present patent application.

Both the slip clutch and the brake device 20 , which both work frictionally, ultimately create an additional limit to the stop 17 occurring maximum forces and moments, which is for the present the connection with very powerful adjustment drives of additional importance.

Ultimately results in a combined interaction of the features of claims 1 and 10 and 13 and 14, in which the advantages of the invention in particular Interestingly come to the fore. In particular, this applies to one Adjusting drive for a tailgate or a trunk lid on a motor vehicle body, at least forces up to 10,000 N (this corresponds to the common usage of a Ton) must be recorded.

As already introductory in detail been explained it is also possible the inventive concept in other adjusting drives, such as adjusting drives for one Side door - hinged door or sliding door - on one Motor vehicle bodywork, for Window regulators and for Seat adjustment drives, or for drives in motor vehicle locking systems o. Use.

Claims (19)

Adjusting drive for moving a functional element ( 2 ) in or on a motor vehicle body ( 1 ), with a drive motor ( 8th ) and a drive motor ( 8th ) downstream reduction gear ( 9 ) with a transmission housing ( 10 ), wherein the reduction gear ( 9 ) at least one output-side actuator ( 13 ), with which the functional element to be moved ( 2 ) is directly or indirectly connectable, and a this actuator ( 13 ) driving pinion ( 14 ), wherein the actuating element ( 13 ) a rack ( 15 ) or a circular arc-shaped toothed segment ( 16 ), with which the drive pinion ( 14 ) meshes, wherein the actuating element ( 13 ) and the drive pinion ( 14 ) on the transmission housing ( 10 ) are mounted, wherein the actuating element ( 13 ), the drive pinion ( 14 ) and their bearings ( 13 ' . 14 ' ) according to material, design, arrangement and execution on the movement of the functional element ( 2 ) are designed under unfavorable circumstances occurring forces and moments and wherein the movement of the actuating element ( 13 ) at least in one direction of movement, preferably in both directions of movement, by a in the reduction gear ( 9 ) ( 17 ) is limited, characterized in that the stop ( 17 ) at the - corresponding - end of the rack ( 15 ) or the tooth segment ( 16 ) is self-formed and further combing the drive pinion ( 14 ) blocked. Adjusting drive according to claim 1, characterized in that the stop ( 17 ) widened over a tooth gap, and preferably with a depression ( 18 ) tooth of the rack provided with a much smaller depth than a tooth gap 15 ) or the tooth segment ( 16 ) is executed. Adjusting drive according to claim 1, characterized in that the stop ( 17 ' ) on the control element ( 13 ) at a distance above the rack ( 15 ) or the tooth segment ( 16 ) in the circle of teeth of the drive pinion ( 14 ) is arranged projecting. Adjusting drive according to claim 3, characterized in that the stop ( 17 ' ) on the control element ( 13 ) at a distance above the rack ( 15 ) or the tooth segment ( 16 ) approximately at the level of the bearing axis ( 14 ' ) of the drive pinion ( 14 ) lies. Adjusting drive according to claim 3, characterized in that the stop ( 17 '' ) on the control element ( 13 ) at a distance above the rack ( 15 ) or the tooth segment ( 16 ) on the of the rack ( 15 ) or the toothed segment ( 16 ) facing away from the drive pinion ( 14 ) lies. Adjusting drive according to one or more of the preceding claims, characterized in that a plurality of stops ( 17 ' . 17 '' ) at the same end of the rack ( 15 ) or the tooth segment ( 16 ) are arranged at different positions and all come into blocking effect. Adjusting drive according to one of the preceding claims, characterized in that the stop ( 17 ) on the control element ( 13 ) itself integrally formed. Adjusting drive according to one of claims 1 to 6, characterized in that the stop ( 17 ) on the control element ( 13 ), in particular molded from plastic. Adjusting drive according to one of the preceding claims, characterized in that the stop ( 17 ) a shock-absorbing design, in particular in the form of a coating, is provided. Adjusting drive according to one of the preceding claims, characterized in that the transmission housing ( 10 ) of a material with substantially lower strength than the material of the actuating element ( 13 ) and the drive pinion ( 14 ) consists. Adjusting drive according to one of the preceding claims, characterized in that the actuating element ( 13 ) and the drive pinion ( 14 ) made of steel, in particular made of high-strength steel. Adjusting drive according to one of the preceding claims, characterized in that the gear housing ( 10 ) made of aluminum, magnesium and / or plastic, in particular of die-cast aluminum parts, Magnesiumdruckgußteilen and / or plastic injection molded parts. Adjusting drive according to one of the preceding claims, characterized in that the reduction gear ( 9 ) Has a slip clutch, preferably an electromagnetically controllable slip clutch with two or, preferably, three coupling stages. Adjusting drive according to one of claims 1 to 12, characterized in that the reduction gear ( 9 ) an electromagnetically controlled braking device ( 20 ), preferably one with two or, preferably, three braking stages. Adjusting drive according to claim 14, characterized in that the reduction gear ( 9 ) a planetary gear stage ( 21 ) and that the braking device ( 20 ) by means of the planetary gear stage ( 21 ) to the reduction gear ( 9 ) is otherwise coupled. Adjusting drive according to one of the preceding claims, characterized characterized in that it is for a drive for a tailgate or a trunk lid on a motor vehicle body is. Adjusting drive according to one of claims 1 to 15, characterized in that it a drive for a side door - hinged door or sliding door - on one Motor vehicle body acts. Adjusting drive according to one of claims 1 to 15, characterized in that it It concerns a window lift drive in a side door of a motor vehicle body is. Adjusting drive according to one of claims 1 to 15, characterized in that it is a Sitzverstellantrieb to a vehicle seat in one Motor vehicle body acts.