CN113329897B

CN113329897B - Drive system for a movable roof part of a roof system of a motor vehicle

Info

Publication number: CN113329897B
Application number: CN202080008707.0A
Authority: CN
Inventors: M·马奎特
Original assignee: BOS GmbH and Co KG
Current assignee: BOS GmbH and Co KG
Priority date: 2019-01-11
Filing date: 2020-01-03
Publication date: 2023-06-13
Anticipated expiration: 2040-01-03
Also published as: DE102019215541A1; CN113286716B; WO2020144117A1; DE102019215545A1; CN113365864B; DE102019215548A1; CN113365864A; CN113329897A; WO2020144122A1; CN113286716A; CN113286719A; DE102019215550A1; WO2020144114A1; CN113286719B; WO2020144120A1

Abstract

The invention relates to a drive system having a rail arrangement which is fastened to a vehicle in a ready-to-assemble state and having a control mechanism which is provided for the controlled displacement of the movable roof part between a closed position, a ventilation position and an open position, wherein the control mechanism has a drive slide which can run in the rail arrangement and which engages for the displacement of the movable roof part at a carrier bar which is connected to the movable roof part. According to the invention, a fastening device is provided which is assigned to the carrier strip and which can be displaced, as a function of the driving movement of the drive slide, between a fastening position in which the carrier strip is fastened to the drive slide at least in a form-fitting manner in the vertical direction by means of the fastening device, and a release position in which the form-fitting fastening is released. The invention also relates to the use in passenger vehicles.

Description

Drive system for a movable roof part of a roof system of a motor vehicle

Technical Field

The invention relates to a drive system for a movable roof part of a roof system of a motor vehicle, comprising a rail device which is fastened to the vehicle in a ready-to-assemble state, and comprising a control mechanism which is provided for the controlled displacement of the movable roof part between a closed position, a ventilation position and an open position, wherein the control mechanism comprises a drive slide which can run in the rail device and which engages for the displacement of the movable roof part with a carrier strip which can be connected to the movable roof part.

Background

Such a drive system is known from DE 10 2015 201 587 A1. The known drive system is a component of a roof system, which is applied as a prefabricated structural unit in the blanked roof region of a passenger vehicle. The drive system has a rail device fixed to the vehicle in a ready-to-assemble state. Furthermore, a control mechanism is provided, by means of which the movable cover part of the cover system can be displaced in a controlled manner between a closed position, a ventilation position and an open position. For this purpose, the control mechanism has a drive slide which can run in a rail arrangement. The drive slide is engaged at a carrier strip that is connectable to a movable cover member.

Disclosure of Invention

The task of the invention is that: a drive system of the type mentioned at the outset is provided which is improved in terms of crash safety.

This task is solved by: a fastening device is provided which is assigned to the carrier bar and can be displaced as a function of the driving movement of the drive ram between a fastening position in which the carrier bar is fastened to the drive ram by means of the fastening device at least in a form-fitting manner in the vertical direction and a release position in which the form-fitting fastening is released. By means of the embodiment according to the invention, a positive-locking fastening between the carrier strip and the drive slide is achieved, which counteracts the tearing off of the cover part of the carrier strip in the event of a crash and thus fastened thereto in the ready-to-assemble state. The positive-locking fastening functions in the same way, except that an effective connection is provided for the displacement of the movable cover part between the carrier bar and the drive slide. For this purpose, a fastening device is provided according to the invention which is assigned to the carrier strip. The fastening device can be displaced between a fastening position and a release position as a function of a driving movement of the drive slide, which is provided for the displacement of the support strip between the closed position, the ventilation position and the open position. In the fastening position, the carrier strip is fastened to the drive slide at least in the vertical direction in a form-fitting manner by means of the fastening device. The form-locking fastening is preferably formed directly between the carrier strip and the drive slide and/or between a component provided for the secure connection between the carrier strip and the movable cover part and the drive slide. By means of the positive locking at least in the vertical direction, the following is avoided: the carrier strip and the roof part fastened thereto in the ready-to-assemble state are torn off in the vertical direction in the event of a crash and the interior space of the motor vehicle is exposed upwards. In the release position, the mentioned form-locking fastening is in contrast dispensed with. The carrier strip can thereby be displaced between the closed position, the ventilation position and the open position by means of a driving movement of the drive slide. In the closed position, the movable roof part is closed flush and aligned with the remaining roof of the motor vehicle. In the ventilation position, the rearward region of the movable roof part is movable upward in the vertical direction. In the open position, the movable roof part is displaced upwards in the vertical direction and backwards in the longitudinal direction, so that the roof opening of the motor vehicle is released. The fastening position of the fastening means preferably takes up only in the closed position of the movable cover part or of the carrier strip and in the corresponding displacement position of the drive slide at the guide rail arrangement. The fastening device is simultaneously displaced into its release position during the driving movement of the drive slide for displacement of the support bar in the direction of the ventilation position and/or the open position. The direction and position data used, such as vertical, longitudinal and transverse directions and also front, rear, above, below, front side, rear side, lateral or the like, are dependent on the state of the drive system ready to be fitted at the motor vehicle and the forward-pointing driving direction of the motor vehicle.

In a further embodiment of the invention, the carrier strip is connected to a cover carrier by means of at least one fastening element, which can be firmly connected to a cover part, wherein the form-locking fastening is formed directly between the cover carrier and the drive slide. The embodiment of the invention ensures the fixing of the movable cover part, which can be firmly connected to the cover carrier, even in the event of a crash-affected failure of at least one fastening element. For this purpose, the form-locking fastening is formed directly between the cover carrier and the drive slide by means of the fastening device. Preferably, the cover carrier is non-releasably connected to the movable cover part. For example, the cover carrier can be joined to the underside of the movable roof part by means of a surrounding foam or an abutment foam which is constructed from plastic. The carrier strip is assembled with the cover carrier by means of at least one fastening element. The at least one fastener is preferably configured in the form of a screw for configuring a threaded connection between the carrier strip and the cover carrier. Preferably, a plurality of fastening elements of the same type are provided.

In a further embodiment of the invention, the fastening device has a first fastening element arranged on the cover carrier and/or the carrier strip and a second fastening element arranged on the drive slide, which co-operate in a fastening position for form-locking fastening and are spaced apart from one another in a release position. Preferably, the first fastening element is formed directly at the cover carrier and/or at the carrier strip. Alternatively, the first fastening element can be produced separately from the cover carrier and/or the carrier strip and thereafter be firmly connected to the cover carrier and/or the carrier strip. Preferably, the second fastening element is formed directly at the drive slide. Alternatively, the second fastening element can be produced separately from the drive slide and thereafter be firmly connected thereto. In the fastening position, the first fastening element and the second fastening element interact in a form-fitting manner. This is not necessarily premised on a completely structured contact between the first and second fastening elements in the sense of the invention. More precisely, in the fastening position, a gap can be formed between the first fastening element and the second fastening element, which gap is initially closed by the inertial forces affected by the crash and by a corresponding deformation of the drive system. In contrast, the first and second fastening elements are spaced apart from one another in the release position and preferably from one another in the longitudinal direction, so that there is no overlap in the vertical direction. The release position is preferably always occupied when the drive slide is displaced from the closed position of the movable cover part or of the carrier strip in the direction of the ventilation position and/or the open position. This embodiment of the invention enables a particularly simple construction.

In a further embodiment of the invention, the first fastening element is supported in the transverse direction on a lateral support edge section of the drive slide over the entire travel path of the drive slide. By virtue of the lateral support of the first fastening element in the transverse direction, an undesired lateral displacement movement of the first fastening element in the event of a crash is avoided. This ensures a defined positioning of the first fastening element relative to the second fastening element, so that a reliable form-locking fastening in the event of a crash is ensured. The entire travel path of the drive slide is to be understood as a travel path along the guide rail arrangement, which is necessary in order to displace the carrier strip between the closed position and the open position.

In a further embodiment of the invention, the first fastening element is formed by a recess extending in the longitudinal direction and/or a projection extending in the longitudinal direction of the wall section of the cover carrier and/or of the carrier strip extending in the vertical direction. This embodiment of the invention makes it possible to achieve a particularly simple and cost-effective construction. The recess and/or the projection is/are preferably embodied at the underside of the cover carrier and/or the carrier strip, which is located below in the vertical direction. Preferably, the cover carrier is made of sheet metal. In this case, the recess and/or the projection can be produced in a particularly simple manner in terms of production technology, for example by means of stamping or grooving of the cover carrier at the respective location. If the first fastening element is formed at the carrier strip, the description of the cover carrier is preferably correspondingly applicable to its design and to the production of the first fastening element in terms of production technology.

In a further embodiment of the invention, the second fastening element is formed by a wall section of the drive slide, which is arranged on the underside of the drive slide lying below in the vertical direction and extends in the transverse direction. This makes it possible to design the fastening device in a particularly space-saving manner. Since the structural height in the vertical direction can be saved by the arrangement at the underside of the drive slide. If the first fastening element is formed by a recess and/or a projection extending in the longitudinal direction of the vertically extending wall section of the cover carrier and/or of the carrier strip, the first fastening element engages in a form-locking manner at least in the vertical direction with the mentioned wall section of the drive slide in the event of a crash.

In a further embodiment of the invention, the second fastening element is formed by a metal or metal-reinforced wall section of the drive slide. This ensures that: the fastening device is subjected to high loads in the event of a crash. In this way, a reliable form-locking fastening of the cover carrier and/or the carrier strip in the event of a crash is achieved. Independent of this embodiment of the invention, the first fastening element is also preferably formed by a metal or metal-reinforced section of the cover carrier and/or of the carrier profile.

In a further embodiment of the invention, the drive slide is produced as a metal-plastic composite component and has a metal insert encapsulated at least in sections by plastic injection molding, wherein the second fastening element is a rail wall of the drive slide, which is formed by the metal insert or is reinforced by means of the metal insert. The crossbar wall extends in a transverse direction. A particularly advantageous design can be achieved by the production of the drive slide as a metal-plastic composite component and the associated design of the second fastening element. This is especially relevant in terms of the mechanical load capacity of the second fastening element.

The invention further relates to a roof system for a motor vehicle with at least one drive system according to the above description.

Drawings

Further advantages and features of the invention result from the claims and from the following description of preferred embodiments of the invention, which are shown in accordance with the accompanying drawings. Wherein:

fig. 1 shows an embodiment of a roof system according to the invention in a schematic perspective view, wherein a movable roof part occupies an open position;

fig. 2 shows an exploded perspective view of an embodiment of a drive system according to the invention for the roof system according to fig. 1;

FIG. 3 shows an exploded view in another perspective of the drive system according to FIG. 2 in a rotated view;

fig. 4, 5, 6 show the drive system according to fig. 2 and 3, wherein a carrier strip provided for connection with a movable roof part of the roof system according to fig. 1 takes up a closed position (fig. 4), a ventilation position (fig. 5) and an open position (fig. 6);

fig. 7 shows the drive system according to fig. 2 to 6 in a schematic top view;

fig. 8 shows the drive system according to fig. 2 to 7 in a longitudinal section through the partial section along the section line VII-VII according to fig. 7 and in the direction of the line of sight onto the fastening device;

fig. 9, 10 show the drive system according to fig. 2 to 7 in a manner corresponding to the illustration of fig. 8, respectively, wherein the fastening devices occupy different displacement states;

fig. 11 shows a drive slide of the drive system according to fig. 2 to 7 in a schematic perspective view;

FIG. 12 shows the metal insert of the drive slide in a view corresponding to FIG. 11; and is also provided with

Fig. 13 shows the drive slide according to fig. 11 in a schematic top view.

Detailed Description

The roof system 1 according to fig. 1 is provided for a roof region of a passenger vehicle. The roof system 1 has a movable roof part 2 and a carrier 3. The movable cover part 2 is displaceable relative to the carrier 3 between a closed position, a ventilation position and an open position shown in fig. 1. In the closed position, the movable roof part 2 closes flush and aligned with a section of the roof region adjacent to the carrier 3. In the open position, the movable roof part 2 is displaced rearward in the longitudinal direction X and upward in the vertical direction Z, so that the roof opening 4 of the passenger vehicle is at least partially opened upward. In the ventilation position, the movable cover part 2 moves upwards from the closed position at the rear edge lying behind in the longitudinal direction X.

For the above-described displacement of the movable roof part 2, the roof system 1 has two drive systems 5 which are arranged at opposite lateral regions of the carrier 3 in the transverse direction Y. The two drive systems 5 are functionally identical and are otherwise designed mirror-symmetrically to the vertical central longitudinal plane of the roof system 1. The two drive systems 5 are driven synchronously with each other by means of an electric motor which is not shown in detail and which is hidden under the front cover plate 6. For the transmission of force and/or movement between the electric motor and the two drive systems 5, a threaded pitch cable is provided in a manner known in principle. The right-hand drive system 5 is described below with reference to the drawing plane of fig. 1, with reference to fig. 2 to 10. The embodiment in question is correspondingly applicable to the drive system 5 on the left opposite in the transverse direction Y.

The drive system 5 has a rail arrangement 7 which is firmly connected to the carrier 3 of the roof system 1 in the ready-to-assemble state. The guide rail arrangement 7 is designed in the embodiment shown as a longitudinally extending, dimensionally stable hollow profile.

The drive system 5 furthermore has a carrier strip 8 which is connected to the underside of the movable roof part 2 in a manner which is also described in more detail. For controlling the displacement of the movable cover part 2, the drive system 5 has a control mechanism with a drive slide 9 on the front side in the longitudinal direction X and a movable mechanism 10 on the rear side. For the controlled displacement of the movable cover part between the mentioned displacement positions, both the drive slide 9 and the movable mechanism 10 are engaged at the carrier strip 8 in a manner which is also described in more detail. The respective displacement positions of the carrier strip 8 which accompany the displacement positions of the movable cover part 2 are referred to in a corresponding manner as closed position, ventilation position and open position.

The drive slide 9 is coupled in a manner not shown in detail to the mentioned threaded pitch cable and can be driven along the guide rail arrangement 7 by an electric motor in this connection. The drive slide 9 is driven in a sliding manner in a manner known per se on a guide track of the guide rail arrangement 7, which is not shown in detail, by means of a slide which is not shown in detail and is arranged on the opposite lateral side. For a controlled displacement of the carrier strip 8 and thus of the movable cover part 2, the drive slide 9 engages at a region 11 in front of the carrier strip 8. The carrier strip 8 has for this purpose a first control cam 12 and a second control cam 13. The two control cams 12, 13 are integrally formed at the front region 11 and project laterally outward in the transverse direction Y. The first control cam 12 is positively guided on a first control slide 14 of the drive slide 9. The second control cam 13 is guided positively on a second control slide 15 of the drive slide 9. The front region 11 has a laterally projecting guide cam, not shown in detail, which is guided in a sliding manner on the guide channel of the guide rail arrangement. The drive slide 9 has a wall portion 16 extending in the longitudinal direction X and in the vertical direction Z, on the inner side of which the

control slide

14, 15 is formed in the transverse direction Y. On the outside of the drive slide 9, which is located outside in the transverse direction Y, a coupling lever 17 is engaged, which is coupled at the other end to the mobile mechanism 10. The mobile machine 10 has a guide slide 18 which, owing to the coupling by means of the coupling rod 17, can travel along the guide rail arrangement 7 at least in sections together with the drive slide 9. For this purpose, the guide slide 18 can travel on the guide track of the guide rail arrangement 7 in a manner which is not described in detail. Furthermore, the mobile machine 10 has a mobile lever 19 and a control slide 20. The control slide 20 is guided in a positively locking manner on a web guide 21 of the carrier bar 8 and is mounted in a rotationally movable manner on the movable lever 19. The movable lever 19 is supported on the guide slide 18 and can be pivoted by means of a travel movement of the guide slide 18 guided in the guide rail arrangement 7 between a movable position rising upwards in the vertical direction Z (fig. 5, 6) and a flat rest position (fig. 4). Depending on the driving movement of the drive slide 9, the coupling lever 17 is connected either releasably to the drive slide 9 or to the inner side wall of the guide rail arrangement 7. The guide slide 18 is accordingly either displaced together with the drive slide 9 or is fixed relative to the guide rail arrangement 7 by means of the coupling rod 17.

In order to connect the carrier strip 8 with the movable cover part 2, a cover carrier 22 is provided in the embodiment shown. The cover carrier 22 is connected to the underside of the movable cover part 2 by means of a plastic wrap foam in a manner which is not shown in detail but is known in principle. The plastic surrounding foam is here a PU surrounding foam. The connection between the movable cover part 2 and the cover carrier 22 cannot be released in this way without damage. In contrast, a releasable joining connection by means of a plurality of fastening elements 24 is provided between the cover carrier 22 and the carrier strip 8. The fastening element 24 is evident in particular from fig. 4 to 6, wherein the cover carrier 22 is only partially shown there (fig. 4) or is hidden from view (fig. 5, 6). The carrier strip 8 has a plurality of receiving holes 23 for the fastening elements 24, which are arranged at a distance from one another in the longitudinal direction X. The cover carrier 22 has corresponding receiving openings for this purpose, which are only hidden from view in fig. 2 and 3 for reasons of illustration.

Fig. 4 shows a displacement position of the drive system 5 corresponding to the closed position of the movable cover part 2. In the closed position, the carrier strip 8 is placed flat together with the cover carrier 22 fastened thereto. The drive slide 9 occupies a forward end position relative to the rail arrangement 7. For displacement into the ventilation position shown in fig. 5, the drive slide 9 runs back in the guide rail arrangement 7 in the longitudinal direction X. In this case, the drive slide 9 is first coupled to the guide slide 18 by means of the coupling rod 17, so that the guide slide runs together with the drive slide 9. The support profile 8 is shifted into the inclined ventilation position, which is apparent from fig. 5, by the above-described positive guidance of the control cams 12, 13 in the

control slide

14, 15 of the drive slide 9, the interaction of the guide cams of the support strip 8 with the guide tracks of the guide rail arrangement 7, and the coupling of the movable mechanism 10 at the web guide 21. In the region of the control slide 20, the carrier strip 8 is movable in the vertical direction Z. Starting from the ventilation position, the carrier strip 8 is displaced together with the cover carrier 22 fastened thereto into the open position shown in fig. 6 by means of a further rearward-directed travel movement of the drive slide 9. The coupling lever 17 is forcibly released from the drive slide 9 in a manner not described in detail and is fastened to the guide rail arrangement 7 in such a way that the guide slide 18 is fastened relative to the guide rail arrangement 7 when it is displaced into the open position. The movable lever 19 is held in its active position, wherein the carrier bar 8 is guided to the control slide 20 by its web guide 21 in a sliding manner.

Limited by the driving state, the roof system 1 is subjected to inertial forces which can lead to high loads on the drive system 5. The inertial forces occurring in the event of an accident can in principle lead to failure of components of the drive system 5, as a result of which in particular the carrier strip 8, the cover carrier 22 and the movable cover part 2 connected thereto can be torn off. Tearing off the movable roof part 2 is accompanied by an additional risk for the occupants of the passenger car.

In order to counteract this, a fastening device A, B assigned to the carrier strip 8 is provided, which can be displaced as a function of the driving movement of the drive slide 9 between a fastening position, in which the carrier strip 8 is fastened to the drive slide 9 by means of the fastening device A, B at least in a form-locking manner in the vertical direction Z, and a release position, in which the form-locking fastening is released.

The form-locking fastening in the embodiment shown acts directly between the cover carrier 22 and the drive slide 9. For this purpose, the fastening means A, B are constructed in a manner which is also described in more detail at the cover carrier 22 and the drive slide 9.

In an embodiment, not shown, the form-locking fastening can be formed directly between the carrier strip 8 and the drive slide 9. In this embodiment, which is not shown, the fastening means A, B are formed on the carrier strip 8 and the drive slide 9, respectively.

The design herein has the following advantages: even in the event of an unexpected release of the fastening element 24 or failure due to a crash, the movable cover part 2 is fixed at least in the vertical direction Z, since the fixing means A, B are formed directly between the cover carrier 22, which is not releasably foamed to the movable cover part 2, and the drive slide 9.

The fastening device A, B has a first fastening element a and a second fastening element B.

The first fastening element a is subordinate to the cover carrier 22 and is in the embodiment shown directly formed at the cover carrier 22. The cover carrier 22 is made of sheet metal and is designed in the shape of a curved stamping element. The cover carrier 22 has an approximately L-shaped cross section and is formed by a horizontally oriented profile leg 25 and a vertically oriented profile leg 26. The

profile feet

25, 26 are oriented approximately at right angles to one another.

The first fastening element a is formed by a recess 27 of the cover carrier 22 extending in the longitudinal direction X. In other words, the first fastening element a is formed by a projection 28 of the cover carrier 22 extending in the longitudinal direction X. The recess 27 is punched out of a region of the cover carrier 22 that is located forward in the longitudinal direction X. The recess 27 and thus the projection 28 are also arranged here on a wall section 26' extending in the vertical direction Z, which is subordinate to the vertically oriented profile leg 26.

The second fastening element B is formed by a wall section 29 of the drive slide 9, which is arranged on the underside of the drive slide 9 lying below in the vertical direction Z and extends in the transverse direction Y.

The drive slide 9 is produced in the illustrated embodiment as a metal-plastic composite component V (fig. 11, 13). The drive slide 9 has a metal insert 30, which is shown in fig. 12. For the construction of the drive slide 9, the metal insert 30 is encapsulated in sections by plastic injection molding. Starting from the initial configuration of the metal insert 30 shown in fig. 12, the ready configuration of the drive slide 9 shown in fig. 11 and 13 is thus formed. The wall section 29 is in the embodiment shown a rail wall of the drive slide, which rail wall is formed by the metal insert 30. The crossbar wall 29 is oriented horizontally and extends in the transverse direction Y between the wall portion 16 provided with the control slide bars 14, 15 and the other wall portion 31 which is opposite spaced apart in the transverse direction Y. The

wall portions

16, 31 can also be referred to as side walls and are integrally continuous.

The front region 11 of the carrier strip 8 is fastened in the transverse direction Y between the wall section 16 of the drive slide and the further wall section 31. Correspondingly, the cover carrier 22 fastened to the carrier strip 8 is positioned on its inner side in the transverse direction Y in the region of the wall section 26' and thus on the inner wall 32 of the other wall section 31 in the region of a of the first fastening element.

The functional manner of the fastening means A, B for positively fastening the movable cover part 2 is shown in particular in fig. 8 to 10. Fig. 8 shows a displacement position of the drive system 5 corresponding to the closed position of the cover member 2. The securing means A, B is in its secured position in the closed position occupation. In this fixed position, the first and second fixing elements a, B cooperate in a form-locking manner in the vertical direction Z, so that tearing off of the cover part 2, which is screwed to the cover carrier 22, of the carrier strip 8 and cannot be released from the cover carrier 22, in the vertical direction Z is counteracted. In the secured position, the rail wall 29 of the drive slide 9 is displaced forward in the longitudinal direction X into the recess 27. In other words, the projection 28 engages the crossbar wall 29 below in the vertical direction Z. In the event of a violent displacement of the cover part 2 in the vertical direction Z, the cover carrier 22 is correspondingly displaced upwards and relative to the remaining components and sections of the drive system 5, as a result of which a support of the projection 28 at the underside of the crossbar wall 29 is obtained. Thereby, a further violent displacement of the cover carrier 22 and thus of the cover member 2 in the vertical direction Z is counteracted.

In the embodiment shown, the securing position of the securing means A, B is only occupied in the closed position of the movable cover part 2. Accordingly, the above-described positive-locking fastening between the cover carrier 22 and the drive slide 9 is not necessary in both the ventilation position (fig. 5) and also in the open position (fig. 6). In this regard, the corresponding displacement positions of the fastening means A, B are shown in fig. 9 and 10. If the drive slide 9 is displaced from the closed position in the direction of the ventilation position, the crossbar wall 29 is moved away from the recess 27 in the longitudinal direction X in the rear direction, so that the positive-locking fastening is released (fig. 9). Accordingly, the first fastening element a and the second fastening element B are spaced apart from one another in the ventilation position. The fastening elements A, B are spaced apart in the longitudinal direction X such that there is no overlap in the vertical direction Z. The same applies in the open position, as is shown in fig. 10.

During the driving movement of the drive slide 9, the inner wall 32 of the drive slide 9 forms a lateral support wall section 33, on which the wall section 26' and thus the first fastening element a are supported in the transverse direction Y. This ensures in particular an improved positioning between the first fixing element a and the second fixing element B.

Claims

1. A drive system (5) for a movable roof part (2) of a roof system (1) of a motor vehicle, having a guide rail arrangement (7) which is fastened to the vehicle in a ready-to-assemble state, and having a control mechanism which is provided for the controlled displacement of the movable roof part (2) between a closed position, a ventilation position and an open position, wherein the control mechanism has a drive slide (9) which can travel in the guide rail arrangement (7), the drive slide (9) engaging a carrier bar (8) which can be connected to the movable roof part for the displacement of the movable roof part, characterized in that a fastening device (A, B) which is subordinate to the carrier bar (8) is provided, which can be displaced, as a function of the travel movement of the drive slide (9), between a fastening position in which the carrier bar (8) is fastened in a form-locking manner to the drive slide (9) at least in the vertical direction (Z) by means of the fastening device (A, B) and a release position in which the form-locking is canceled,

wherein the carrier strip (8) is connected to a cover carrier (22) which can be firmly connected to the cover part (2) by means of at least one fastening element (24), wherein a form-locking fastening is formed directly between the cover carrier (22) and the drive slide (9),

wherein the fastening device (A, B) has a first fastening element (A) arranged on the cover carrier (22) and/or the carrier strip (8) and a second fastening element (B) arranged on the drive slide (9), which interact for a form-fitting fastening in the fastening position and are spaced apart from one another in the release position,

wherein the first fastening element (A) is supported on a lateral support wall section (33) of the drive slide (9) in the transverse direction (Y) over the entire travel path of the drive slide (9).

2. The drive system (5) according to claim 1, characterized in that the first fastening element (a) is formed by a recess (27) extending in the longitudinal direction (X) and/or a projection (28) extending in the longitudinal direction (X) of the wall section (26') of the cover carrier (22) and/or of the carrier strip (8) extending in the vertical direction (Z).

3. The drive system (5) according to claim 1, characterized in that the second fixing element (B) is constituted by a wall section (29) of the drive slider (9) which is arranged at a lower side of the drive slider (9) lying below in the vertical direction (Z) and extends in the transverse direction (Y).

4. The drive system (5) according to claim 1, characterized in that the second fastening element (B) is formed by a wall section (29) of the drive slide (9) which is made of metal or is reinforced by metal.

5. The drive system (5) according to claim 4, characterized in that the drive slide (9) is produced as a metal-plastic composite component (V) and has a metal insert (30) which is encapsulated at least in sections by plastic injection molding, wherein the second fastening element (B) is a rail wall of the drive slide (9) which is formed by the metal insert (30) or which is reinforced by means of the metal insert (30).

6. Roof system (1) for a motor vehicle with at least one drive system (5) according to any of the preceding claims 1-5.