DE102007030139B4 - Adjusting drive for moving a functional element in or on a motor vehicle body - Google Patents

Abstract

Adjusting drive for moving a functional element (2) in or on a motor vehicle body (1) with a drive motor (8) and a reduction gear (9) connected downstream of the drive motor (8) to a transmission housing (10), wherein the reduction gear (9) is at least one Output-side adjusting element (13) to which the functional element (2) to be moved is directly or indirectly connectable, and a drive pinion (14) driving this adjusting element (13), wherein the adjusting 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) are mounted on the transmission housing (10), wherein the actuating element (13), the drive pinion (14) and their bearings ( 13 ', 14') are designed according to material, design, arrangement and design on the forces and moments occurring during movement of the functional element (2) even under unfavorable circumstances, and wherein the movement of the adjusting element (13) is limited at least in one direction of movement, preferably in both directions of movement, by a stop (17, 17 ', 17' ') provided in the reduction gear (9), characterized in that the stop (17) on the corresponding end of the rack (15) or of the toothed segment (16) itself is formed and blocks the further combing of the drive pinion (14).

Description

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

Adjustment drives in or on a motor vehicle body are required for a wide variety of applications. Depending on which functional element is how to move, the design and interpretation of the adjustment differs. Particularly highly stressed is an adjusting drive when a heavy functional element in or on the vehicle body has to be moved with an unfavorable lever reduction.

Particularly difficult circumstances are in an adjusting drive for moving a motor vehicle door as a functional element. The term "motor vehicle door" is to be understood comprehensively in the present case. This includes not only the side doors of a motor vehicle, but also a tailgate, a trunk lid, a hood or a cargo door and a possibly existing lifting roof. A motor vehicle door is described herein as a functional element on a motor vehicle body, such a motor vehicle door is therefore not attributed to the vehicle body itself in this consideration. Accordingly, such a motor vehicle door is hinged or slidably mounted on the vehicle body, wherein in any case a door opening of the vehicle body is thereby closed.

An adjusting drive for moving a lowerable side window in a side door of 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, an adjustment for moving a vehicle seat in the horizontal direction or for moving a seat back of a vehicle seat, commonly referred to as seat adjustment, an adjustment for moving a functional element in a motor vehicle body.

In the present case, it concerns an adjusting drive for moving a functional element in or on a motor vehicle bodywork as such. This has a reduction gear with a transmission housing. On the transmission housing, the output-side adjusting element of the reduction gear, with which the functional element to be moved is directly or indirectly connectable, as well as a drive pinion driving this actuating element are mounted. Actuator and drive pinion are to a certain extent the basic equipment of this reduction gear, but which may well have more gear parts or gear stages, in most cases even will have.

A "transmission housing" within the meaning of the teaching of the present invention need not be completely closed. There may also be larger or smaller sections open. Ultimately, it is the reduction gear more or less largely enveloping carrier, which can fulfill the previously described bearing function.

The drive motor can be arranged with in the gear housing of the reduction gear, but it can also be set in a separate housing or more or less open on the gear housing of the reduction gear or stored elsewhere.

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

In order to meet its requirements in operation is to provide in the adjustment that the actuator, the drive pinion and their bearings by material, design, arrangement and design to absorb the forces and moments occurring during movement of the functional element in operation even under unfavorable circumstances in a position ,

An adjustment of the type in question regularly has at least one end position, usually two end positions for the mutually opposing directions of movement 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 10 2004 014 551 A1 ).

A limitation of the movement of the actuating element by a provided in the reduction gear stop is also advantageous because the adjustment is then completely self-sufficient, for example, can be completely tested even in the non-installed state.

It goes without saying that the previously described function of the stop or the stops does not preclude further control of the adjusting element of the adjusting drive by means of position sensors or the like. The latter is of considerable interest in particular for the approach of intermediate positions for the adjusting drive.

Adjusting drives of the type in question in the exemplary and particularly interesting embodiment as a tailgate drives are known in various embodiments (see, for. DE 102 45 136 A1 ; DE 101 17 935 A1 ; DE 20 2004 016 543 U1 ). Typical applications in the motor vehicle body are z. B. seat adjustments (eg. DE 32 14 592 A1 ).

The known adjusting drive, from which the invention concretely proceeds ( DE 20 2004 016 542 U1 ), 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 which is coupled via a planetary gear of the reduction gear with the actual power transmission train. The brake device has a separate drive from the drive shaft itself driving drive. In one of the variants realized here, this separate brake drive has a permanent magnet generating a magnetic field and an electromagnet. The magnetic field generated by the permanent magnet causes a force on the brake in the direction of the braking position. Depending on the polarity of the electromagnet, this magnetic field generated by the permanent magnet is attenuated or amplified. 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 down, but can be moved manually with little effort.

Multistage electromagnetic devices are also used as slip clutches in the power transmission train of reduction gears ( WO 03/104671 A1 ).

In order to record at the adjustment of the type in question, the forces and moments occurring at the stop, in particular in block operation of the electric drive motor, the stop bearing gear housing must be designed to be resistant. In the prior art, the gear housing is therefore designed as a steel part with high strength for this and other reasons. The adjustment drive as a whole is difficult. If you take lighter and less resistant materials for the gearbox, so you have to do this with extensive, voluminous, especially ribbed constructions in the attack area particularly resistant. This will make the gearbox large. This is often unacceptable at the installation locations desired for the adjustment.

The teaching is thus based on the problem, the known adjustment for movement of a functional element in or on a motor vehicle body in such a way and further, that the maximum forces and moments receiving stop for the actuator is optimally integrated in the reduction gear.

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 is based on the consideration that the actuator, the drive pinion and their bearings - of course - according to material, design, arrangement and design is designed for the forces and moments occurring during movement of the functional element even under unfavorable circumstances. Exactly the already designed so on the forces and moments occurring components and their corresponding massive bearings in the gear housing itself are now also used for blocking in the end position of the control element. Additional measures for the design of the transmission housing especially for the attack can therefore be omitted. The gear housing can be designed and remain just as it must be configured anyway for normal operation when moving the functional element.

Preferred embodiments and further developments of the above-explained basic teaching of the present invention are the subject matter of the subclaims. These subclaims and further preferred embodiments and further developments as well as advantages and variants of the invention are explained in more detail below with reference to the drawing in the description of preferred exemplary embodiments. 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 in the context of the teaching of the invention, only the function of the components of The reduction gear 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.

In a tailgate of a motor vehicle unfavorable circumstances are given, for example, when the motor vehicle with inclined vehicle body is on a slope when very high outside temperatures prevail, so that the gas springs for the tailgate are very strong biased, or if very low temperatures prevail, so that the Gas springs show little effect. For other applications of the adjustment, there are similar boundary conditions that lead to particularly high forces and moments, but still need to be overcome. Of course, there are limits that define the circumstances that are still reasonably expected in daily operation, for which the adjustment drive should and should remain functional.

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 illustrated embodiments is therefore intended 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 o. 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 o. The like. Exist.

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 of the given according to claim 10 relationship, which makes the realization of the adjustment drive 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 after a few hundred load changes simply ripped out and the entire adjustment 3 become unusable.

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 pinion 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 of additional importance for the present context in very powerful adjustment drives.

Ultimately, there is a combined interaction of the features of claims 1 and 10 and 13 and 14, in which the advantages of the invention come in particularly interesting way to advantage. In particular, this applies to an adjustment for a tailgate or a trunk lid on a motor vehicle body, in which at least forces up to 10,000 N (which corresponds to the general usage of a ton) must be recorded.

As already explained in detail in the introduction, it is also possible to use the inventive concept in other adjusting drives, for example adjusting drives for a side door pivoting door or sliding door on a motor vehicle bodywork, for window lift drives and seat adjustment drives, or also for drives in motor vehicle locking systems or the like. 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 . 17 ' . 17 '' ) is limited, characterized in that the stop ( 17 ) at the - corresponding - end of the rack ( 15 ) or the tooth segment ( 16 ) 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 in that it is a drive for a tailgate or a trunk lid on a motor vehicle body. Adjusting drive according to one of claims 1 to 15, characterized in that it is a drive for a side door pivoting door or sliding door - on a motor vehicle body. Adjusting drive according to one of claims 1 to 15, characterized in that it is a window lift drive in a side door of a motor vehicle body. Adjusting drive according to one of claims 1 to 15, characterized in that it is a Sitzverstellantrieb on a vehicle seat in a motor vehicle body.

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