EP2075395A2 - Actuator for powered closure of a vehicle lock - Google Patents

Abstract

The drive has a drive housing (2) and a drive motor (4), where linear drive movement is producible by the drive motor in an assembled condition and is transmitted to a motor vehicle lock (1) by a transmission unit (3) e.g. Bowden cable. An advance gear is provided downstream to the drive motor for producing the drive movement, and is formed as a spindle-spindle nut-gear with a spindle and a spindle nut. A drive shaft of the drive motor is coupled with the spindle directly or by an intermediate transmission e.g. planetary drive.

Description

The invention relates to a closing auxiliary drive for a motor vehicle lock with the features of the preamble of claim 1

In the present case, all types of door / hood IDeckel or flap locks are summarized under the term motor vehicle lock.

The Kraftfaluzeugschloß is equipped with the usual closing elements latch and pawl, wherein the pawl holds the latch in a main closed position and in a prelocking position. The pawl is then in a lowered position. The latch is engageable with a locking wedge or the like on the body. In the present case, the closing wedge or the like is attributable to the motor vehicle lock.

In the course of increasing the comfort of use today's motor vehicle locks are equipped with different automatic functions. These include, for example, a closing auxiliary function, in which the motor vehicle lock is transferred by a motor Vorschließzustand in a main closing state. The advantage here is the fact that the user must adjust the vehicle door to close only up to a Vorschließzustand, and that this with relatively little. Effort is possible. Door seal back pressures are not yet effective here. Only the adjustment of Vorschließzustand in the main closed state is associated with a compression of the door seal and thus with a considerable force, which is done by means of .eines Schließhilfsantriebs.

There are already known various variants for the realization of the auxiliary closing function. A variant ( DE 39 35 804 C2 ) provides that the closing wedge cooperating with the lock latch for the closing of the motor vehicle door is motor-displaced. In another variant ( DE 102 39 734 A1 ) It is such that the lock catch is adjustable by means of the closing aid motor of the prelocking in the main closed position and thus the motor vehicle lock total of Vorschließzustand in the main closing state.

In the latter realization of the auxiliary closing function of the auxiliary closing drive is then activated when the latch reaches the pre-closing position. For this purpose, a control unit in the form of a closing auxiliary control is provided.

In the above arrangements, it has been found to be disadvantageous that the space requirement in the field of motor vehicle lock by the integration of the auxiliary closing drive is undesirably high, which leads to considerable structural limitations. Furthermore, the modularity of the arrangement with regard to the realization of the additional function "closing aid" is low.

In the known closing auxiliary drive ( DE 10 2006 048 026 A1 ), from which the invention proceeds, the auxiliary closing drive is arranged separately from the motor vehicle lock and drivingly coupled to the motor vehicle lock via a Bowden cable. This solves the space problem in the field of motor vehicle lock in a satisfactory manner and corresponds to a modular design.

However, the space problem has been relocated in the known auxiliary closing drive only. The known, thus designed auxiliary closing drives are of considerable size, which leads to corresponding installation space problems at the respective location remote from the motor vehicle lock. Furthermore, the known auxiliary closing drives of considerable weight.

The invention is therefore based on the problem underlying the known auxiliary closing drive in such a way and further develop that the space requirement and the weight of the auxiliary closing drive can be reduced.

The above problem is solved in a Schließhilfsantneb with the features of the preamble of claim 1 by the features of the characterizing part of claim 1.

It is essential to first realize that by equipping the Schließhilfsantriebs with a feed gear for generating a linear drive movement, which is designed as a spindle-spindle nut transmission, with appropriate Design leads to a minimal space requirement. Furthermore, such an arrangement can be realized with a minimum number of components, which in addition leads to a low weight.

According to claim 4, a preferred embodiment is that the spindle of the drive side and the spindle nut of the output side of the feed gear is associated. This means that the spindle is driven by the drive motor while the spindle nut extends along the spindle, which in this case corresponds to the linear drive movement.

A particularly compact arrangement can be achieved according to claim 7, characterized in that the spindle nut of the drive side and the spindle of the output side of the feed gear is associated. This means that now the spindle nut, and not the spindle, is driven by the drive motor. In the particularly preferred embodiment according to claim 8, the drive shaft of the drive motor is designed as a hollow shaft, which simultaneously forms the spindle nut of the feed gear. In a further preferred embodiment, it is finally provided that the drive motor is designed in terms of the drive of the hollow shaft in the manner of an electric direct drive. In this case, the space requirement can be reduced to a minimum by the nested arrangement of the drive motor and feed gear.

In the particularly preferred embodiments according to claims 11 and. 12, the proposed auxiliary closing auxiliary drive can be interpreted in a simple manner to the respective application case or parameterized. Different applications may require different forces, speeds and feeds, which leads to different drive motors, intermediate gears or feed gears accordingly. Depending on the configuration, the drive housing and possibly the Bowdenzugendstück must be adjusted. This is particularly easy in a telescopic embodiment according to claim 12.

The further preferred embodiments according to claims 14 and 15 provide measures to prevent tilting of the spindle nut relative to the spindle, even if the coupling of the Bowden cable soul is eccentrically coupled to the spindle nut relative to the axis of the spindle.

Fig. 1

den strukturellen Aufbau eines vorschlagsgemäßen Schließhilfsantriebs im montierten Zustand,

Fig. 2

den Schließhilfsantrieb gemäß Fig. 1 in einer ersten Ausführungsform, in einer geschnittenen Seitenansicht,

Fig. 3

den Schließhilfsantrieb gemäß Fig. 1 in einer zweiten Ausfuhrungsform in einer geschnittenen Seitenansicht,

Fig. 4

den Schließhilfsantrieb gemäß Fig. 1 in einer dritten Ausfuhrungsform, in einer geschnittenen Seitenansicht,

Fig. 5

den Schließhilfsantrieb gemäß Fig. 4 mit teleskopierbarem Antriebsgehäuse und teleskopierbarem Bowdenzugendstück und

Fig. 6

einen vorschlagsgemäßen Schließhillsantrieb mit zwei Antriebsspindeln.

In the following the invention will be explained in more detail with reference to a drawing illustrating only embodiments. In the drawing shows

Fig. 1

the structural design of a proposed closing auxiliary drive in the assembled state,

Fig. 2

the closing auxiliary drive according to Fig. 1 in a first embodiment, in a sectional side view,

Fig. 3

the closing auxiliary drive according to Fig. 1 in a second embodiment in a sectional side view,

Fig. 4

the closing auxiliary drive according to Fig. 1 in a third embodiment, in a sectional side view,

Fig. 5

the closing auxiliary drive according to Fig. 4 with telescopic drive housing and telescopic Bowdenzugendstück and

Fig. 6

a proposed Schließhillsantrieb with two drive spindles.

The in Fig. 1 shown, structural design of a proposed closing auxiliary drive applies to all in the Fig. 2 to 4 illustrated Ausfübbrungsbeispiele. This auxiliary closing drive is assigned to a motor vehicle lock 1. With regard to the broad understanding of the term "motor vehicle lock" may be made to the general part of the description.

In all the illustrated embodiments, the auxiliary closing drive has its own drive housing 2 and is arranged separately from the motor vehicle lock 1 in the mounted state. It can be the representation in Fig. 1 can be seen that the auxiliary closing drive is coupled via a transmission means 3 in terms of drive technology with the motor vehicle lock 1.

In detail, the Fig. 2 to 4 each deduce that the auxiliary closing drive has a drive motor 4, wherein in the assembled state by means of Drive motor 4 a linear drive movement can be generated and transmitted via the transmission means 3 to the motor vehicle lock 1. As a result of this linear drive movement, the motor vehicle lock 1 can be transferred from the pre-closed state into the main closed state. These conditions have been explained in the general part of the description.

The Fig. 2 to 4 show in three embodiments further that the auxiliary closing drive for generating the linear drive movement has a drive motor 4 downstream feed gear 5 and that the feed gear 5 is configured in all Ausfuhnmgsformen as spindle spindle nut gear with a spindle 6 and a spindle nut 7.

The motor vehicle lock 1 can be largely associated with any closure elements in a motor vehicle lock. Preferably, however, it is so that the motor vehicle lock 1 is associated with a motor vehicle door or a motor vehicle door. The motor vehicle door may also be a sliding door.

The transmission means 3 is preferably designed as a Bowden cable, which regularly has a Bowden cable core 8 and a Bowden cable casing 9. Depending on the design constraints, other variants of the transmission means 3 are conceivable. An example of the realization of the transmission means 3 is a simple cable pull. Another example of the realization of the transmission means 3 is a rack whose teeth in the motor vehicle lock 1 in engagement with, for example, the latch 1 can be brought. Another example of the realization of the transmission means 3 is a linkage, which may also contain a gimbal linkage .. Basically, it is finally also conceivable to equip the transmission means 3 with a hydraulic connection.

The drive movement in the present case is a linear drive movement. Accordingly, the use of a spindle-spindle nut transmission for the feed gear 5 is particularly advantageous. Depending on the configuration of the motor vehicle lock 1, an adapted design of the auxiliary closing drive with regard to the extent of the drive movement and the amount of driving force is necessary.

In all cases, it is initially the case that the motor vehicle lock 1, the closing elements lock latch 10 and pawl 11 and one of the latch 10 associated Schueßkloben 12 has. The basic interaction of these components has been explained in the general part of the description.

At the in Fig. 1 illustrated and preferred embodiment, the latch 10 is brought into a pre-closing position, not shown, and in the illustrated main closing position. For this purpose, the latch 10 has a pre-catch 13 and a main catch 14, which are each engageable with an engagement portion 15 of the pawl 11 in engagement. At the in Fig. 1 illustrated and so far preferred embodiment, it is also such that the auxiliary closing drive is coupled in the assembled state with the lock latch 10, and that the latch 10 by the drive generated by the auxiliary closing drive movement of the prelocking in the main closed position and thus the motor vehicle lock 1 total of the Vorschließzustand can be brought into the main closing state. In this case, the auxiliary closing drive preferably initially causes an adjustment of the latch 10 in an overstroke position, so that the pawl 11 can occur. Subsequently, the latch 10 falls back into the main closed position and is held there by the pawl 11. In this arrangement, the Bowden cable core 8 of the Bowden cable 3 is preferably coupled to the latch 10.

In principle, however, it is also conceivable that the auxiliary closing drive does not act on the lock catch 10 but on the locking bolt 12. In this embodiment, not shown, it is provided that the locking block 12 in turn can be brought into a prelocking and in a main closed position, that the auxiliary closing drive is coupled in the assembled state with the locking cam 12 and that the closing cam 12 by the drive motion generated by the auxiliary closing drive of the Preliminary position in the main closing position and thus the motor vehicle lock 1 can be brought in total from the Vorschließzustand in the main closing state.

Both variants of motor vehicle locks 1 require the transmission of a drive movement via the transmission means 3, beer over the Bowden cable 3. However, the range of motion and the force required depending on the embodiment different, which has corresponding effects on the design of the auxiliary closing drive.

The term "spindle-spindle nut transmission" and the terms "spindle" and "spindle nut" are to be understood in connection with the feed gear 5 wide. Basically, it is provided that the spindle 6 has a spindle thread and that the spindle nut 7 a Spindle nut thread has. But it can also be provided that either the spindle 6 or the spindle nut 7 have a corresponding thread.

In particular, it can be provided that the spindle 6 has a driver which engages in the spindle nut thread of the spindle nut 7. Alternatively, it may also be provided that the spindle nut 7 has a driver which engages in the spindle thread of the spindle 6. Under "driver" is here to understand any shape that is suitable to come into engagement with a thread and to achieve a result of a feed of spindle nut 7 or spindle 6. For example, the driver may be a simple nose or the like.

In connection with the threads of spindle 6 and spindle nut 7 may further be pointed out that the pitch of the thread of spindle 6 and / or spindle nut 7 may change over the longitudinal extent thereof. This can be achieved that the translation of the spindle-spindle nut transmission, so the feed gear 5, changed via a closing auxiliary operation. This can be advantageous depending on the design constraints.

Fig. 2 now shows an arrangement in which the spindle 6 of the drive side and the spindle nut 7 is assigned to the output side of the feed gear 5. This means that the spindle 6 can be driven by the drive motor 4 and that the spindle nut 7 represents the output of the feed gear 5. Accordingly, it is preferably provided that the transmission means 3, here the Bowden cable core 8 of the Bowden cable 3, in the assembled state is directly coupled to the spindle nut 7. Here and preferably, it is further such that the spindle nut 7 of the feed gear 5 rotatably but longitudinally displaceable. The rotation of the spindle nut 7 will be discussed below.

At the in Fig. 2 illustrated preferred embodiment, the drive motor 4, an intermediate gear 16 is connected downstream, which acts with its output side on the spindle 6. In principle, however, it can also be provided that the drive shaft, not shown, of the drive motor 4 is coupled directly to the spindle 6. In a particularly preferred embodiment, the drive shaft of the drive motor 4 even forms the spindle 6 itself.

At the in Fig. 2 illustrated embodiment, therefore, the spindle 6 is driven while the spindle nut 7 rotatably but longitudinally displaceable. Here, as a result, a rotational movement of the spindle 6 is converted into a longitudinal movement of the spindle nut 7.

For preventing rotation, a longitudinal guide 17 is provided, in which a nose 18 or the like of the spindle nut 7 engages. Accordingly, the spindle nut 7 moves in a rotation of the spindle 6 in Fig. 2 up or down. Fig. 2 shows the initial position of the spindle nut 7. The end position of the spindle nut 7 after completion of a closing auxiliary operation is shown in dashed lines.

Here and preferably, the spindle nut 7 is designed as a sleeve which is connected to the in Fig. 2 lower end is closed. Here and preferably, it is further such that this end face the crosspoint 19 for the transmission means 3, here for the Bowden cable 8 of the Bowden cable 3, provides.

In order to simplify the installation of the auxiliary closing drive, in particular of the Bowden cable 3, it is preferably provided that the spindle nut 7 forms a preassemblable unit together with the transmission means 3, here with the Bowden cable core 8 of the Bowden cable 3. In particular, it is provided that the spindle nut 7 in the assembled state is inseparably connected to the transmission means 3, here with the Bowden cable 8 of the Bowden cable 3. It is conceivable that the spindle nut 7 is made in the plastic injection molding process and that the Bowden cable core 8 is embedded in the spindle nut 7. Other connection vanes may be advantageously applicable.

At the in Fig. 2 illustrated and so far preferred embodiment, it is such that the drive motor 4, the possibly existing intermediate gear 16 and the feed gear 5 are arranged in the drive housing 2 one behind the other. It is further preferred that these components are aligned with the drive shaft of the drive motor 4 and / or on the axis of the spindle 6.

Another arrangement is according to the preferred embodiment Fig. 3 has been chosen. In this case, the drive motor 4 and the feed gear 5 are arranged in the drive housing 2 at least partially nested with respect to the longitudinal extension of the auxiliary closing drive. This nested arrangement may also refer to an optional intermediate mesh screen 16.

Here and preferably, the spindle nut 7 of the drive side and the spindle 6 of the output side of the feed gear 5 is assigned. Unlike the in Fig. 1 illustrated embodiment, therefore, the spindle nut 7 is driven by the drive motor 4, while the spindle 6 runs along the spindle nut 7 here. Here forms the spindle. 6 the abrasion of the feed gear 5 and is accordingly preferably directly to the transmission means 3, here the Bowden cable 8 of the Bowden cable 3, coupled.

It is further preferably provided that the spindle 6 of the feed gear 5 rotatably but longitudinally displaceable. Here, as a result, a rotational movement of the spindle 6 is converted into a longitudinal movement of the spindle nut 7.

The above-mentioned nested of the individual components is at the in Fig. 3 illustrated embodiment achieved in that the drive shaft of the drive motor 4 is designed as a hollow shaft and that the hollow shaft forms the spindle nut 7 of the feed gear 5 and preferably has a spindle nut thread for this purpose. Within the spindle nut 7, the spindle 6 is arranged, wherein the rotation is again formed by a kind of nose 18 which runs in a longitudinal guide 17.

It shows up in Fig. 3 vividly that the space requirements, especially in the longitudinal extension of the auxiliary closing drive seen is particularly low. This is achieved in particular by the fact that the drive motor 4 is designed with respect to the drive of the hollow shaft in the manner of an electric direct drive. The hollow shaft, here the spindle nut 7, thus simultaneously forms the rotor of the drive motor.

It can be the representation in Fig. 3 subtract that the spindle 6 of the feed gear 5 is disposed completely within the spindle nut 7. Here and preferably this applies regardless of the position in which the auxiliary closing drive is currently located.

Interesting is in the Fig. 3 illustrated and insofar preferred embodiment, the fact that the extension of the drive motor 4 total corresponds substantially to the extent of the drive shaft and the spindle nut 7. This is primarily due to the fact that the drive motor 4 is designed in the manner of an electric direct drive.

In order to ensure the simplest possible assembly here, it is provided in a particularly preferred embodiment that the spindle 6 forms a preassemblable unit together with the transmission means 3, here with the Bowden cable 8 of the Bowden cable 3. Here, the same applies as the above to the spindle nut 7 executed.

It has already been indicated above that between the drive motor 4 and the feed gear 5, an intermediate gear 16 may be connected. This is in Fig. 1 shown schematically.

Fig. 4 shows a preferred embodiment in which the intermediate gear 16 is designed as a planetary gear. The planetary gear regularly has a sun gear 20, a planet carrier 21 and a ring gear 22. The advantage here is already the fact that a planetary gear allows a particularly space-saving design. The representation in Fig. 4 Furthermore, the planet gears 21a are to be taken, which are mounted on the planet carrier 21.

In a particularly preferred embodiment, one of the elements sun gear 20, planet carrier 21 and ring gear 22 to the drive motor 4, in particular the drive shaft of the drive motor 4, assigned. Another of these elements is assigned according to the drive side of the feed gear 5. Finally, the third of these elements is at least slowed down or completely fixed for the auxiliary closing operation.

Here and preferably, the sun gear 20 is associated with the drive motor 4, in particular the drive shaft of the drive motor 4. The ring gear 22 is formed by the drive housing 2 and is fixed accordingly. The internal gear in the planet carrier 21 is located in detail on the web plate of the Planetenradträgers 21. Basically, it can also be provided that the spindle nut 7 is coupled directly to the planet carrier 21.

At the in Fig. 4 illustrated embodiment is again the basic principle of the feed gear 5 according to Fig. 3 realized. The rotation of the spindle nut 7 is converted into a longitudinal movement of the spindle 6. For this purpose, it is again provided that the spindle 6 is provided with a nose 18 which runs to prevent rotation in a longitudinal guide 17.

In all the illustrated embodiments, the drive housing 2 has a single, continuous section. In principle, it is also conceivable that the drive housing 2 composed of several sub-housings. For example, it may be advantageous to provide the ring gear 22 of the planetary gear 5 in a separate drive housing, in particular in order to provide a suitably wear-resistant material for this purpose.

In all the illustrated embodiments, it is further such that a Bowdenzugendstück 23 is supported on the drive housing 2. Basically, a support on a separate drive housing is also conceivable here. It has proved particularly advantageous if, as in Fig. 4 shown, a longitudinal guide 17 of the rotation on this Bowden cable end piece 23 is provided.

In all the illustrated embodiments, it is finally so that the drive motor 4 is designed as an electric drive motor. Basically, it is also conceivable that this is a pneumatic or a hydraulic drive motor.

Of particular importance is the fast assembly of the Bowden cable 3. This has already been indicated above. In addition to the proposed pre-assembly of. Spindle 6 and Bowden cable core 8 and spindle nut 7 and Bowden cable core 8, it is conceivable to realize a kind Bowdemzugschnellverschluß. The Bowden cable core 8 would be inserted into an opening in the spindle 6 and the spindle nut 7 and clamped during retraction with self-locking.

The electrical control of a closing tool operation is particularly simple in the illustrated embodiments. To start a closing auxiliary operation, the electric drive motor 4 is energized in a first direction, and indeed until the latch 10 has been transferred to its main closed position, in particular in its overstroke position. After switching off the drive motor 4, the drive motor 4 is energized in the opposite direction until the spindle nut 7 and the spindle 6 reaches the starting position. Basically, it is conceivable here that a spring preload, for example, the drive shaft of the drive motor 4 is provided, which ensures that the drive motor 4 automatically moves back to the starting position without re-energizing.

In a particularly preferred embodiment of the auxiliary closing drive, in particular the drive motor 4 with optionally downstream intermediate gear 16 and further downstream feed gear 5, not designed self-locking. This has the particular advantage that the arrangement of the overstroke position in the main closing position after switching off the drive motor 4 can automatically fall back, by the high then acting door seal back pressure.

In a further preferred embodiment, it is provided that at least the inside of the drive housing 2 is designed substantially rotationally symmetrical with respect to the longitudinal extent of the auxiliary closing drive. Hereby, an optimal utilization of the available space can be achieved.

It can be summarized that with all the illustrated embodiments extremely small space requirements are connected. Due to the small number of components can also be achieved a particularly low weight. Im, the result is also the production, in particular the assembly, with very little effort possible.

It has been explained in the general part that, depending on the application, a different interpretation of the proposed auxiliary closing drive is required. In order to accomplish this interpretation with minimal effort, it is in the in Fig. 5 illustrated and so far preferred embodiment provided that the drive housing 2 and the support of the Bowden cable 9, here the Bowdenzugendstücks 23, are configurable so that different drive motors 4, different intermediate gear 16 and different feed gear 5, each with different dimensions, can be used. In certain applications, it may also be necessary to dispense with an intermediate gear 16.

The above configurability is beer and preferably realized in that the drive housing 2 is designed to adapt to the respective drive motor 4 and / or the respective intermediate gear 16 in two parts. It may also be advantageous that the drive housing 2 is composed of more than two parts.

In terms of easy configurability, it is now preferably so that the two parts 2a, 2b of the drive housing 2 are designed to be telescopic. In detail, this means that the first part 2a of the drive housing 2 is slidable over the second part 2b of the drive housing 2. Due to the overlapping of the two parts 2a, 2b of the drive housing 2, the length of the drive housing 2 can be adapted to the respectively selected components. For fixing the two parts 2a, 2b of the drive housing 2 to each other, a latching can be provided.

In the Fig. 5 embodiment shown also shows that the Bowdenzugendstück 23 relative to the drive housing 2 for adaptation to the respective feed gear 5 is telescoped. This can only be an alternative to telescoping be provided of the drive housing 2. The telescoping of the Bowden cable end piece 23 means here that the Bowden cable end piece 23 can be pushed onto the drive housing 2 in various positions. Depending on the overlap between the Bowdenzugendstück 23 and the drive housing 2, an adaptation to the respective feed gear 5 is possible. This concerns in particular the design of the auxiliary closing drive to different operating strokes. Again, a latching is preferably provided for attachment between the Bowdenzugendstück 23 and the drive housing 2.

In certain applications, it may be advantageous for the Bowden cable core 8 of the Bowden cable 3 to be eccentrically coupled to the spindle nut 7 relative to the axis of the spindle 6. Then it is further preferably so that the spindle 6 is also arranged eccentrically with respect to the drive shaft of the drive motor 4.

It is obvious that in the above off-center arrangement, the risk of tilting of the spindle nut 7 relative to the spindle 6 is given. For this case, it is preferably provided that for supporting the spindle nut 7 a parallel to the spindle 6 arranged longitudinal guide 17 is provided, on which the spindle nut 7 runs. The longitudinal guide 17 may be a guide rod which passes through a corresponding guide bore in the spindle nut 7. It is also conceivable, however, a guide groove into which the spindle nut 7 engages with a corresponding web-like shape

In a particularly preferred embodiment, however, it is provided that a second coupled to the drive shaft of the drive motor 4 spindle 6a is provided and that the spindle nut 7 has a second spindle nut thread, which is associated with this second spindle 6a. This is the illustration in Fig. 6 refer to.

In the Fig. 6 illustrated embodiment has similar to those in Fig. 5 illustrated embodiment, a drive motor 4, a downstream planetary gear 16 and a turn downstream spindle-spindle nut transmission 5, which here, however, two spindles 6, 6a. The two spindles 6, 6 a are coupled to the planet carrier 21 of the planetary gear 16, in that the planet carrier 21 has a spur gear which is connected to the planetary gear carrier 21 Spur gears of the two spindles 6, 6a meshes. At the in Fig. 6 illustrated and so far preferred Ausfühnungsform rotate the two spindles 6, 6a in opposite directions, so that the spindle threads must be oriented accordingly different.

Here and preferably, the two spindles 6, 6a are arranged symmetrically relative to the drive shaft of the drive motor 4. In such a symmetrical arrangement, the risk of tilting the spindle nut 7 on one of the two. Spindles 6, 6a extremely low. This increases the overall reliability of the proposed closing auxiliary drive.

Claims (15)

Auxiliary closing drive for a motor vehicle lock (1), wherein the auxiliary closing drive has its own drive housing (2) and in the assembled state is arranged separately from the motor vehicle lock (1), wherein the auxiliary closing drive is drive-coupled via a transmission means (3) to the motor vehicle lock (1), wherein the auxiliary closing drive has a drive motor (4), wherein in the mounted state by means of the drive motor (4) a linear drive movement generated and the transfer means (3) on the Kraftfahtzeugschloß (1) is transferable, wherein the motor vehicle lock (1) by the drive movement of a Vorschließzustand is convertible into a main closing state,
characterized,
in that the closing auxiliary drive has a feed gear (5) arranged downstream of the drive motor (4) and that the feed gear (5) is configured as a spindle-spindle nut gear with a spindle (6) and a spindle nut (7). Closing auxiliary drive according to claim 1, characterized in that the transmission means (3) is designed as a Bowden cable with Bowden cable core (8) and Bowden cable casing (9). ' Closing auxiliary drive according to claim 1 or 2, characterized in that the motor vehicle lock (1) has the closing elements latch (10) and pawl (11) and one of the lock latch (10) associated with closing cam (12), preferably in that the latch (10) in a Vorschließstellung and in a main closed position can be brought and held there by the pawl (11) that the auxiliary closing drive in the assembled state with the latch (10) is drivingly coupled and that the latch (10) generated by the closing auxiliary drive movement of the Preliminary position in the main closed position and thus the Kraftfabneugschloß (1) from the Vorschließzustand in the main closed state can be brought, or that the Schließkloben (12) can be brought into a Vorschließstellung and in a Hauptschließstellung that the Schließhilfsantrieb in the assembled state with the Schließkloben (12) coupled drive technology is t and that the locking block (12) through the generated by the auxiliary closing drive drive movement of the Vorschließstellung in the main closed position and thus the motor vehicle lock (1) can be brought from the Vorschließzustand in the main closing state. Closing auxiliary drive according to one of the preceding claims, characterized in that the spindle (6) of the drive side and the spindle nut (7) is associated with the output side of the feed gear (5), preferably in that the transmission means (3), in particular the Bowden cable core (8) of Bowden cable (3), in the assembled state is directly coupled to the spindle nut (7). Closing auxiliary drive according to claim 4, characterized in that the drive shaft of the drive motor (4) forms the spindle (6). Closing auxiliary drive according to claims 2 and 4 and optionally according to claim 5, characterized in that the spindle nut (7) together with the Bowden cable core (8) forms a preassemblable unit, preferably, that the spindle nut (7) in the assembled state inseparable from the Bowden cable soul (8) is connected. Closing auxiliary drive according to one of the preceding claims, characterized in that the spindle nut (7) is associated with the drive side and the spindle (6) with the drive side of the feed gear (5), preferably in that the transmission means (3), in particular the Bowden cable core (8) of the Bowden cable (3), directly coupled to the spindle (6). Closing auxiliary drive according to claim 7, characterized in that the drive shaft of the drive motor (3) is designed as a hollow shaft and in that the hollow shaft forms the spindle nut (7) of the feed gear (5), preferably in that the drive motor (4) with respect to the drive Hollow shaft is designed in the manner of an electric direct drive, and / or that the spindle (6) of the feed gear (5) is arranged completely within the spindle nut (7). Closing auxiliary drive according to claims 2 and 7 and optionally according to claim 8, characterized in that the spindle (6) together with the Bowden cable soul (8) forms a preassemblable unit, preferably, that the spindle (6) in the assembled state is inseparably connected to the Bowden cable core (8). Closing auxiliary drive according to one of the preceding claims, characterized in that between the drive motor (4) and the feed gear (5), an intermediate gear (16) is connected, preferably, that the intermediate gear (16) is designed as a planetary gear and that the planetary gear is a sun gear ( 20), a Planetenradträger (21) and a ring gear (22), preferably, that one of the elements sun gear (20), planet carrier (21) and ring gear (22) is associated with the drive motor (4) that another of the elements sun gear (20), planet carrier (21) and ring gear (22) is assigned to the drive side of the feed gear (5) and that the third of the elements sun gear (20), planet carrier (21) and ring gear (22) is braked or fixed at least for the auxiliary closing operation , Preferably, that the planet carrier (21) is associated with the drive side of the feed gear (5), preferably, that the planet carrier (21) the Spindelm utter (7) forms or is directly coupled to the spindle nut (7). Closing auxiliary drive according to one of the preceding claims, characterized in that the drive housing (2) and optionally the support of the Bowden cable casing (9), in particular a Bowdenzugendstücks (23), is so configurable or are that different drive motors (4) and / or different - or no - intermediate gear (16) and / or different feed gear (5), each with different dimensions, can be used. Scbließhilfsantrieb according to claim 11, characterized in that the drive housing (2) for adaptation to the respective drive motor (4) and / or the respective intermediate gear (16) is designed at least in two parts, preferably, that the parts of the drive housing for adjustment are telescopic. Closing auxiliary drive according to claim. 4 and possibly one of claims 5 to 14, characterized in that the Bowden cable core (8) of the Bowden cable (3) relative to the axis of the spindle (6) off-center with the spindle nut (7) is coupled, preferably, that the spindle (6) relative to the drive shaft of the drive motor (4) is arranged eccentrically. Auxiliary closing drive according to one of the preceding claims, characterized in that a longitudinal guide (17) arranged parallel to the spindle (6) is provided for supporting the spindle nut (7) on which the spindle nut (7) runs. Auxiliary closing drive according to one of the preceding claims, characterized in that a second spindle (6a) coupled to the drive shaft of the drive motor (4) is provided and that the spindle nut (7) has a second spindle nut thread associated with the second spindle (6a), Preferably, that the two spindles (6, 6a) are arranged symmetrically relative to the drive shaft of the drive motor (4).

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