EP3914795A1

EP3914795A1 - Drive device for a window lifter having a gear cover

Info

Publication number: EP3914795A1
Application number: EP20702248.4A
Authority: EP
Inventors: Gabriele Lange; Roland Kalb
Original assignee: Brose Fahrzeugteile SE and Co KG
Current assignee: Brose Fahrzeugteile SE and Co KG
Priority date: 2019-01-24
Filing date: 2020-01-23
Publication date: 2021-12-01
Also published as: WO2020152259A1; DE102019200890A1; CN113366187A; US11821252B2; US20220098917A1

Abstract

The invention relates to a drive device (1) for an adjusting apparatus for adjusting a vehicle part, in particular a window lifter, comprising a drive housing (7) which has a housing pot (70), a drive gear (6) accommodated in the housing pot (70) so as to be rotatable about an axis of rotation (D), an output element (3) operatively connected to the drive gear (6) and a gear cover (5) connected to the housing pot (70) and extending in an annular manner about the axis of rotation (D), said gear cover having a cover body (50) which has a first edge portion (502) connected to the housing pot (7) and a second edge portion (500) protruding radially inwards relative to the first edge portion (502), a height (H1, H2) measured axially between the first edge portion (502) and the second edge portion (500) varying when viewed in a circumferential direction about the axis of rotation (D).

Description

Drive device for a window regulator with a gear cover

description

The invention relates to a drive device for an adjusting device for adjusting a vehicle part, in particular a window regulator, according to the preamble of claim 1.

Such a drive device for an adjusting device for adjusting a vehicle part, in particular a window lifter, comprises a drive housing which has a housing pot, a drive wheel accommodated in the housing pot so as to be rotatable about an axis of rotation, an output element which is operatively connected to the drive wheel and an annular ring connected to the housing pot the axis of rotation extends gear cover, which has a cover body which has a first edge section connected to the housing pot and a second edge section which projects radially inwards with respect to the first edge section.

Such a drive device can in particular be part of a window lift device and thus serve to adjust a window pane. Such a drive device can also be used to adjust another adjustment element, for example a sunroof or the like, in a vehicle.

In the case of a window lifter, for example, one or more guide rails can be arranged on an assembly support of a door module, on each of which a driver coupled to a window pane is guided. The driver is over one flexible, designed for the transmission of (exclusively) tensile forces (e.g. a pull rope) coupled to the drive device, the pull element being arranged on the cable drum in such a way that when the cable drum rotates, the pull element winds with one end on the cable drum and with one other end unwound from the rope drum. There is thus a shifting of a rope loop formed by the pull rope and accordingly a movement of the driver along the respectively assigned guide rail. Driven by the drive device, the window pane can be adjusted, for example in order to open or close a window opening on a vehicle side door.

In a drive for an adjustment device in a motor vehicle known from DE 10 2004 044 863 A1, a cable drum is arranged on a bearing dome of a drive housing, the drive housing being connected to a support element in the form of an assembly support via a fastening element in the form of a screw.

A drive device for a window lifter, which is to be mounted, for example, on a carrier element in the form of a unit carrier of a door module on a vehicle side door and is therefore to be enclosed within a vehicle side door, is intended to have advantageous operating properties, in particular a smooth-running behavior with low vibration excitation on the carrier element and should also have the Use available space efficiently. There is a need here for the drive device to be compact, but the drive device must provide sufficient torque to ensure reliable adjustment of the adjustment part to be adjusted, for example the window pane.

In such a drive device, a gear cover is used to limit an interior of the housing pot, at least in sections, such that the drive wheel is enclosed in the housing pot with the cooperation of the gear cover. Such a gear cover can provide a seal with respect to the drive wheel rotatably accommodated in the housing pot, so that moisture does not get into the area of the drive wheel and a drive motor that is operatively connected to the drive wheel, especially from the side of the output element, which is designed, for example, as a cable drum can. The object of the present invention is to provide a drive device for an adjusting device for adjusting a vehicle part, in particular a window lifter, which enables a compact, space-saving construction when using a gear cover which is suitable for a sealing function with respect to the drive wheel.

This object is achieved by an object with the features of claim 1.

Accordingly, a height measured axially between the first edge section and the second edge section varies along a circumferential direction around the axis of rotation.

The gear cover has a cover body which is connected to the housing pot with a first edge section, for example welded. The cover body of the gear cover thus bears against a wall section assigned to the housing pot via the first edge section, so that the gear cover is held in position on the housing part via the first edge section. In contrast, the second edge section protrudes radially inward from the first edge section and thus extends radially toward the axis of rotation about which the drive wheel is rotatably received in the housing pot. The cover body of the gear cover thus covers the drive wheel in sections with the second edge section, so that the drive wheel is enclosed in the housing pot by the gear cover, in particular via the radially inner, second edge section.

Compared to the second edge section, the first edge section does not have a constant height, but rather a height, viewed in the circumferential direction about the axis of rotation. For example, the second edge section can extend in a ring around the axis of rotation along a plane directed perpendicular to the axis of rotation and is thus aligned parallel to the drive wheel rotatably received in the housing pot. The second edge section faces the drive wheel and can, for example, carry a sealing element via which a seal between the gear cover and the drive wheel is provided. The first edge section of the gear cover does not extend at a constant height from the second edge section, but has a varying height from the second edge section. For example, in one configuration, the first edge section can extend along a plane which is directed obliquely to the axis of rotation. The first edge section extends for example in a ring around the axis of rotation, but is oriented obliquely to the axis of rotation and thus has a varying height to the second edge section.

In another embodiment, the first edge section can have different sections that are at different heights relative to the second edge section. A first section of the first edge section can thus be arranged at a first height, while a second section of the first edge section is located at a second height. The first height and the second height differ from one another, so that the different sections of the first edge section have different heights relative to the second edge section, each measured along axially along the axis of rotation.

The fact that the first edge section and the second edge section do not extend parallel to one another, but rather the height between the first edge section and the second edge section, viewed in the circumferential direction around the axis of rotation, makes it possible to have a drive device in a compact design, in particular axially along the axis To provide reduced space requirement for the axis of rotation. For example, the drive housing can have a housing section that encloses a gear element that is operatively connected to the drive wheel, for example a drive worm. In the area of such a housing section, a comparatively large height between the first edge section and the second edge section may be required in order to be able to produce a welded connection between the gear cover and the drive housing. In the area of such a housing section, for example, a material thickening can be provided in order to connect the gear cover to the housing section enclosing the gear element, so that, for example, a welded connection can be produced using laser welding or ultrasound welding via such a material thickening. In other sections of the drive housing, however, a reduced height between the first edge section and the second edge section can be sufficient. In such areas of the drive housing, the height between the first edge section and the second edge section of the gear cover can thus be chosen to be small, so that where the gear cover does not have to be of great height, the gear cover with a small height axial space is formed and thus does not unnecessarily contribute to the axial space of the drive device.

This can have the further advantage that, in those areas in which the height between the first edge section and the second edge section of the gear cover is small, more installation space can be made available in the axial direction for other functional components, for example one designed as a pulling rope Power transmission means that is operatively connected to the output element and extends for power transmission from the output element to a vehicle part to be driven.

The varying height can be created by inclining the first edge section. In this case, the first edge section thus extends in a ring shape along a plane that is oblique to the axis of rotation. Alternatively, the first edge section can have different sections, each of which extends parallel to the second edge section, but is at different heights to the second edge section, so that an elevated section of the first edge section can be provided, in particular, where the gear cover, for example, with a a gear element for driving a drive wheel enclosing housing section is to be connected.

The gear cover can be connected circumferentially to the drive housing, in particular a wall section of the housing pot, via the first edge section, the connection between the gear cover and the drive housing being produced extensively, in particular via a welded connection, for example by means of laser welding or ultrasonic welding. In particular, in the area of a section of the first edge section that is raised relative to the second, radially inner edge section, a material thickening can be provided on the drive housing, in particular in the area of a housing section that encloses a gear element for driving the drive wheel, in order to provide a welded connection in the area of such a housing section to be able to manufacture.

In one embodiment, the gear cover has a sealing element arranged on the cover body for sealing a transition to the drive wheel. The sealing element is preferably connected to the second edge section and projects, for example, radially inward from the second edge section of the cover body or axially along the axis of rotation in the direction of the drive wheel. A seal is created between the gear cover and the drive wheel via the sealing element, so that the sealing element slides on the drive wheel when the drive wheel is rotated, but lies sealingly against the drive wheel.

The sealing element can, for example, be integrally connected to the cover body by means of two-component plastic injection molding. In this case, the sealing element is formed from a soft material, in particular an elastomeric plastic, integrally with the cover body of the gear cover, wherein the cover body can be made, for example, from a comparatively hard plastic. Alternatively, the sealing element can also be made as a separate element from a suitable soft material, for example an elastomeric plastic, and can be attached to the cover body, for example, by producing a positive connection.

In one configuration, the drive wheel has a rotating body and a collar projecting axially from the rotating body along the axis of rotation. The drive wheel can be designed as a spur gear, in which case spur gear teeth are formed on the rotary body on a circumferential outer circumferential surface. The collar protrudes from the rotary body, with which a sealing element arranged on the cover body of the gear cover, for example projecting radially inward from the cover body, cooperates in a sealing manner for moisture-tight sealing.

The drive device can have, for example, a motor unit with an electric motor. The electric motor comprises a stator, a rotor that can be rotated relative to the stator, and a rotatable drive shaft that can be driven by the electric motor. The drive shaft can, for example, carry a drive worm with worm teeth. The drive shaft can be connected to a drive wheel of the gear stage via the drive worm, so that the drive wheel can be driven by a rotary movement of the drive shaft.

The drive device can be part of a cable drive, for example, in which a cable drum is operatively connected to the drive wheel. The cable drum is thus driven via the drive wheel, so that a pulling element arranged on the cable drum, for example a pulling cable, is moved and the vehicle part to be adjusted by means of the drive device is thereby adjusted. Such a cable drive can, for example Be part of a window regulator device or a sunroof drive or a tailgate drive.

An assembly, for example a vehicle door, comprises a drive device of the type described above and a carrier element, for example a door module, to which the drive device is connected. The drive housing of the drive device can be arranged here on a first side of the carrier element together with the drive wheel encased in the motor pot and the housing cover connected to the motor pot, which faces, for example, a drying chamber of a vehicle door. The output element, for example in the form of a cable drum, can be arranged on a second side of the carrier element, so that the output element and the drive housing are located on different sides of the carrier element. The output element can in this case be operatively connected to the drive wheel through an opening in the carrier element, a transition between the first side of the carrier element and the second side of the carrier element being sealed, for example, by a sealing element arranged on the gear cover, so that moisture is not easily removed which, for example, can reach the second side of the carrier element assigned to a wet room of a vehicle door in the region of the first side of the carrier element.

The idea on which the invention is based will be explained in more detail below with reference to the exemplary embodiments illustrated in the figures. Show it:

1A is an exploded view of an embodiment of a

Drive device;

1 B shows the exploded view according to FIG. 1A, from a different perspective;

2 shows a schematic view of a window lift device;

3 shows a view of an exemplary embodiment of a drive housing with a drive wheel rotatably received thereon and a gear cover;

FIG. 4 shows another view of the drive housing according to FIG. 3; 5 shows a partially sectioned view of the drive housing with the drive wheel and the gear cover enclosed therein;

FIG. 6 shows another view of the exemplary embodiment according to FIG. 5;

FIG. 7 shows an enlarged representation of the view according to FIG. 6;

FIG. 8 shows an end view of the arrangement according to FIG. 6;

9 is a separate view of the gear cover;

Fig. 10 is a cutaway view of another embodiment of a

Gear cover on a housing pot of a drive housing of a drive device;

FIG. 11 shows an enlarged representation of the view according to FIG. 10;

Fig. 12 is a view of yet another embodiment of a

Gear cover on a housing pot of a drive housing of a drive device;

Fig. 13 is a view of the embodiment of FIG. 12, in which

Drive housing separate gear cover;

FIG. 14 shows another view of the arrangement according to FIG. 13;

15 shows a separate view of the gear cover of the exemplary embodiment according to FIGS. 12 to 14;

16 shows a sectional view of the drive device of the exemplary embodiment according to FIGS. 12 to 15; and

17 shows a view of a cable outlet housing on a side of a carrier element facing away from the drive housing. 1A, 1B show an exemplary embodiment of a drive device 1, which can be used, for example, as a drive in an adjusting device for adjusting a window pane, for example a vehicle side door.

Such an adjusting device in the form of a window lifter, shown by way of example in FIG. 2, has, for example, a pair of guide rails 11, on each of which a driver 12, which is coupled to a window pane 13, can be adjusted. Each driver 12 is coupled to a drive device 1 via a force transmission element in the form of a traction cable 10, which is designed to transmit (only) traction forces, the traction cable 10 forming a closed cable loop and with its ends with an output element in the form of a cable drum 3 (see for example FIGS. 1A and 1B) of the drive device 1 is connected. The pull rope 10 extends from the drive device 1 by deflection rollers 110 at the lower ends of the guide rails 11 to the drivers 12 and from the drivers 12 by deflection rollers 111 at the upper ends of the guide rails 11 back to the drive device 1.

In operation, a motor unit of the drive device 1 drives the cable drum 3 in such a way that the pull cable 10 is wound onto the cable drum 3 at one end and is unwound from the cable drum 3 at the other end. As a result, the rope loop formed by the pull rope 10 moves without changing the freely extending rope length, which leads to the fact that the drivers 12 move in the same direction on the guide rails 11 and the window pane 13 is thereby adjusted along the guide rails 11.

In the exemplary embodiment according to FIG. 2, the window lifter is arranged on an assembly carrier 4 of a door module. The subframe 4 can be fixed, for example, to a door inner panel of a vehicle door and represents a preassembled unit which can be preassembled on the vehicle door with a window regulator arranged on the subframe 4.

The drive device 1 of the exemplary embodiment according to FIGS. 1A, 1B is arranged on a surface section 40 of a carrier element 4 realized, for example, by an assembly carrier of a door module and has a cable outlet housing 2 arranged on a first side of the carrier element 4 and a cable outlet housing 2 facing away from the first side , second side of the carrier element 4 arranged drive housing 7. The cable outlet housing 2 is used to attach the cable drum 3 to the carrier element 4 to be stored, while the drive housing 7 includes a drive wheel 6, which can be driven by a motor unit 8 and is connected to the cable drum 3, so that the cable drum 3 can be driven by rotating the drive wheel 6.

The cable drum 3 on the first side of the carrier element 4 is arranged, for example, on a vehicle door of a vehicle, in a wet area of the vehicle door if it is arranged as intended. In contrast, the drive housing 7 is located in the drying compartment of the vehicle door. The separation between the wet room and the dry room is established by the carrier element 4, and the interface between the drive wheel 6 and the cable drum 3 must be sealed in a moisture-tight manner, so that no moisture can get into the dry room from the wet room.

The cable outlet housing 2 has a base 20, a cylindrical bearing element 22 protruding centrally from the base 20 in the form of a bearing dome, and housing sections 21 spaced radially from the bearing element 22 in the form of housing webs extending parallel to the cylindrical bearing element 22. The cable drum 3 is rotatably mounted on the bearing element 22 and is thereby enclosed by the cable outlet housing 2 such that the cable drum 3 is held on the carrier element 4.

The cable drum 3 has a body 30 and, on the circumferential circumferential surface of the body 30, a cable groove 300 formed in the body 30 for receiving the traction cable 10. With a ring gear 31, the cable drum 3 is inserted into an opening 41 of the carrier element 4 and connected in a rotationally fixed manner to the drive wheel 6, so that a rotary movement of the drive wheel 6 leads to a rotary movement of the cable drum 3.

The drive housing 7 is attached to the other, second side of the carrier element 4 and has a housing pot 70 with a bearing element 72 formed centrally therein in the form of a cylindrical bearing dome, which extends through an opening 62 of the drive wheel 6 and in this way rotatably supports the drive wheel 6 . Connected to the housing pot 70 is a worm housing 74, in which a drive worm 81 lies, which is connected in a rotationally fixed manner to a drive shaft 800 of an electric motor 80 of the motor unit 8 and is in meshing engagement with an outer toothing 600 with an external toothing 600 of a rotating body 60 of the drive wheel 6. The drive shaft 800 is via a bearing at its end facing away from the electric motor 80 stored in the worm housing 74. The electric motor 80 is in this case in a motor pot 73 of the drive housing 7, which is closed to the outside via a housing cover 75.

The drive housing 7 also has an electronics housing 76, in which a circuit board 760 with control electronics arranged thereon is enclosed. The electronics housing 76 is closed to the outside via a housing plate 761 with a connector 762 arranged thereon for the electrical connection of the electronics of the circuit board 760.

The drive wheel 6, axially protruding from the rotary body 60, has a connecting wheel 61 with an external toothing 610 formed thereon, which engages with the ring gear 31 of the cable drum 3 in such a way that an internal toothing 310 of the ring gear 31 (see, for example, FIG. 1 B) is in meshing engagement with the external toothing 610 of the connecting wheel 61. In this way, the drive wheel 6 and the cable drum 3 are connected to one another in a rotationally fixed manner, so that the cable drum 3 can be rotated on the carrier element 4 by driving the drive wheel 6.

To assemble the drive device 1, the cable outlet housing 2 is attached to the carrier element 4 on the one hand and the drive housing 7 to the carrier element 4 on the other hand. The attachment to the carrier element 4 then takes place in that a fastening element 9 in the form of a screw element is inserted into an engagement opening 721 on the underside of the drive housing 7 such that the fastening element 9 extends through an opening 720 in the bearing element 72 of the drive housing 7 and centrally engages in an opening 221 within the bearing element 22 of the cable outlet housing 2. Via the fastening element 9, the cable outlet housing 2 and the drive housing 7 are clamped axially to one another on the bearing elements 22, 72 and are fixed above them on the carrier element 4.

For assembly, the cable outlet housing 2 is attached to the first side of the carrier element 4, so that the cable outlet housing 2 surrounds the cable drum 3 and holds it on the carrier element 4. In contrast, the drive housing 7 is attached to the other, second side of the carrier element 4 in such a way that the motor pot 73 comes to rest in the surface section 40 in a formation 44 and the worm housing 74 in the surface section 40 in a subsequent formation 440. In the During assembly, the ring gear 31, which is formed on the output element in the form of the cable drum 3, comes into operative connection with the connecting wheel 61 of the drive wheel 6, so that the cable drum 3 is connected to the drive wheel 6 in a rotational test and thus a rotational movement of the drive wheel 6 is transmitted to the cable drum 3 during operation . The cable drum 3 engages with the ring gear 31 in the opening 41 of the carrier element 4, so that the ring gear 31 engages through the carrier element 4 in order to provide an operative connection between the output element in the form of the cable drum 3 on the first side of the carrier element assigned to a wet area of the vehicle door 4 and the drive wheel 6 on the second side of the carrier element 4 assigned to the drying room.

The drive housing 6, as shown in a first exemplary embodiment in FIGS. 3 to 9, is connected to a gear cover 5, which at least partially delimits an interior of the housing pot 70, in which the drive wheel 6 is rotatably accommodated, and extends circumferentially about the axis of rotation D extends on the housing pot 70. The gear cover 5 serves in particular to produce a moisture-tight transition to the drive wheel 6, so that moisture cannot get from the area of the wet area of the vehicle door via the drive wheel 6 into the area of the motor unit 8 and the electronics enclosed in the electronics housing 76.

The gear cover 5 has a cover body 50 which is connected, in particular welded, to a circumferential wall section of the motor pot 70 via a first, annular edge section 502 which extends circumferentially about the axis of rotation D. Radially inward from this first edge section 502 is a second edge section 500, which also extends in a ring around the axis of rotation D and is connected to the first edge section 502 via an axial connecting section 501.

Arranged on the second edge section 500 is a sealing element 51 which is in sealing contact with radially inwardly projecting sealing lips 510 (see in particular FIG. 7) with a collar 63 of the drive wheel 6 projecting axially from the rotating body 60 of the drive wheel 6 and thus a transition seals moisture-tight to the drive wheel 6 even when the drive wheel 6 is rotated about the axis of rotation D.

In the exemplary embodiment according to FIGS. 3 to 9, the second edge section 500 of the gear cover 5 extends in an annular manner along a plane E1 that is perpendicular to the Axis of rotation D directed and thus aligned parallel to the drive wheel 6, as can be seen from Fig. 8. In contrast, the first edge section 502 extends in an annular manner along a plane E2, which is set obliquely to the axis of rotation D, which has the consequence that the height H1, H2 of the first edge section 502 to the second edge section 500, measured axially along the axis of rotation D, extends circumferentially varies about the axis of rotation D.

In particular, the height H1, H2 between the first edge section 502 and the second edge section 500 in a region of the gear cover 5 facing away from the worm housing 74 is smaller than in the region of the gear cover 5 in which the gear cover 5 is connected to the worm housing 74 (height H2 in Fig. 8). This makes it possible to provide a material thickening 741 in the area of the screw housing 74, which also enables the production of a welded connection, in particular by means of laser welding or ultrasound welding, in the area of the screw housing 74.

In such an area in which a comparatively large axial installation space is required for connecting the gear cover 5 to the drive housing 7, namely in the area of the worm housing 74, the gear cover 5 thus has a comparatively large axial height H2 (see FIG. 8) . In other areas, in which such an axial height H2 is not required and the gear cover 5 can be formed correspondingly with a smaller axial height H1 (see FIG. 8), the axial installation space of the gear cover 5 is reduced, on the other hand, which enables the axial installation space to reduce the drive housing 7 overall.

In particular, as shown in FIG. 17, this also allows more space to be available on the side of the carrier element 4 facing away from the drive housing 7 in an area A in which a force transmission means in the form of a traction cable 10 extends from the cable drum 3 adjust so that the installation space for the pull rope 10 is not cramped. Thus, in area A, the axial installation space on the side of the carrier element 4 facing away from the drive housing 7 is enlarged, due to the reduced axial height H1 of the gear cover 5 in this area and connected to the drive housing 7. In an area B, on the other hand, the axial installation space is on the side of the carrier element 4 facing away from the drive housing 7 is smaller, owing to the greater axial height H2 of the transmission cover 5 in this area and connected to the drive housing 7. Because the pull cable 10 is in operation due to the opening and closing Unwinding moves axially on the cable drum 3, the space for movement of the traction cable 10 on the cable drum 3 can thus be increased.

In the exemplary embodiment shown, the gear cover 5 is produced by means of two-component plastic injection molding, so that the sealing element 51 is integrally molded with the cover body 50 by means of injection molding. The sealing element 51 projects with its sealing lips 510 radially inward from the second, radially inner edge section 500 of the gear cover 5, which is annular in its basic shape.

Alternatively, the sealing element 51 can also be formed as a separate element to the cover body 50 of the gear cover 5 and, for example, be positively connected to the cover body 50.

The gear cover 5 has, on the first, upper edge section 502 of the cover body 50, a coding device 52 in the form of radial projections which, when the gear cover 5 is connected to the drive housing 7, engages with a form-locking element 700 on the outside of the housing pot 70, as is particularly the case 3 and 4 can be seen. This coding device 52 in cooperation with the form-locking element 700 has the effect that the gear cover 5 can only be attached to the drive housing 7 in the correct mounting position, which facilitates the mounting of the drive housing 7 and the drive device 1.

In an embodiment shown in FIGS. 10 and 11, the sealing element 51 is formed as a separate element to the cover body 50 of the gear cover 5 and in this case is attached as an O-ring to a bent section 505 projecting axially from the second edge section 500. The sealing element 51 is in contact with the collar 63 projecting axially from the rotating body 60 of the drive wheel 6 and thus produces a moisture-tight transition to the drive wheel 6.

Otherwise, the exemplary embodiment according to FIGS. 10 and 11 is functionally identical to the exemplary embodiment according to FIGS. 3 to 9, so that reference should also be made to the preceding explanations.

In an exemplary embodiment shown in FIGS. 12 to 16, the first edge section 502 of the cover body 50 of the gear cover 5 has different sections 503, 504, each parallel to the radially inner, second Edge section 500 extends and are thus directed parallel to the drive wheel 6. 14 and 15, the different sections 503, 504 are located at different heights H1, H2, with an axially higher section 504 of the first edge section 502 being assigned to the screw housing 74 and being connected to the screw housing 74. The gear cover 5 is thus axially increased only where an increase is required due to the connection to the worm housing 74. In other areas, the first edge section 502 has a reduced axial height H1 and extends parallel to the drive wheel 6 and parallel to the radially inner, second edge section 500 and is thus directed perpendicular to the axis of rotation D.

In the exemplary embodiment according to FIGS. 12 to 16, two sealing elements 51, 5T are arranged on the gear cover 5. A first sealing element 51 is used for sealing against the drive wheel 6 and is connected to the radially inner, second edge section 500 such that the sealing element 51 projects axially in the direction of the drive wheel 6 from the radially inner, second edge section 500, as is particularly the case the sectional view of FIG. 16 can be seen. A transition to the drive wheel 6 is thus sealed moisture-tight via this sealing element 51.

In contrast, a second sealing element 51 'serves for moisture-tight sealing between the gear cover 5 and the carrier element 4, to which the drive housing 7 is attached, as can be seen from FIG. 16. The sealing element 51 ′ is arranged on the radially inner edge section 500 and points — on a side facing away from the drive wheel 6 — from the inner edge section 500 toward the carrier element 4.

Both sealing elements 51, 5T are, for example, integrally formed on the gear cover 5 by means of two-component plastic injection molding, but can also be attached to the gear cover 5 as separately manufactured elements. Both sealing elements 51, 5T are made of a soft material, in particular an elastomeric plastic.

In all of the exemplary embodiments of the transmission cover 5, as described above with reference to FIGS. 3 to 17, the mode of operation of the drive device 1 can in principle be identical, so that with regard to the mode of operation of the drive device 1, reference is made to the explanations relating to FIGS. 1A, 1B and 2 shall be. The idea on which the invention is based is not restricted to the exemplary embodiments described above.

The drive device described is not limited to use in window lift devices. The invention can be used in very different embodiments with very different drives for adjusting a vehicle part, for example a sunroof or also a seat part or the like.

Reference list

1 drive device

10 power transmission element (pull rope)

11 guide rail

110, 111 redirection

12 drivers

13 window pane

2 cable outlet housings

20 floor

21 housing section

22 bearing element (bearing dome)

221 opening

3 output element (cable drum)

30 bodies

300 rope groove

31 ring gear

310 gearing

4 support element (subframe)

40 surface section

41 opening

44 formation

440 formation

5 gear cover

50 lid body

500 Inner edge section

501 survey section

502 Outer edge section

503, 504 section

505 Bent section

51, 51 'sealing element

510 sealing lips

52 coding device

6 drive wheel

60 rotating bodies

600 external teeth

61 connecting wheel 610 gearing

62 opening

63 fret

7 drive housing

70 housing pot

700 positive locking element

72 bearing element (bearing dome)

720 opening

721 access opening

73 engine pot

74 worm housing 741 material thickening

75 housing cover

76 electronics housing

760 board

761 housing plate

762 connectors

8 motor unit

80 electric motor

800 drive shaft

81 drive worm

9 fastener

A, B location

D axis of rotation

E1, E2 level

H1, H2 height

Claims

1. Drive device (1) for an adjusting device for adjusting a vehicle part, in particular a window regulator, with

a drive housing (7) which has a housing pot (70),

one accommodated in the housing pot (70) so as to be rotatable about an axis of rotation (D)

Drive wheel (6),

an output element (3) which is operatively connected to the drive wheel (6) and a gear cover (5) which is connected to the housing pot (70) and has a ring around the axis of rotation (D) and which has a cover body (50) which is connected to the housing pot (7 ) connected first edge section (502) and a second edge section (500) protruding radially inwards with respect to the first edge section (502), characterized in that an axially measured between the first edge section (502) and the second edge section (500) Height (H1, H2) viewed along one

The circumferential direction around the axis of rotation (D) varies.

2. Drive device (1) according to claim 1, characterized in that the second edge section (500) extends along a plane (E1) directed perpendicular to the axis of rotation (D).

3. Drive device (1) according to claim 1 or 2, characterized in that the first edge section (502) extends along a plane (E2) directed obliquely to the axis of rotation (D).

4. Drive device (1) according to one of claims 1 to 3, characterized in that the first edge section (502) has a first section (503) and a second section (504), the first section (503) at a first height (H1) to the second edge section (500) and the second section (504) at a second height (H1), which is greater than the first height (H1), to the second edge section (500)

5. Drive device (1) according to one of the preceding claims, characterized in that the gear cover (5) on the first edge section (502) is connected to the drive housing (7), in particular welded.

6. Drive device (1) according to one of the preceding claims, characterized in that the gear cover (5) has a on the cover body (50) arranged sealing element (51) for sealing a transition to the drive wheel (6).

7. Drive device (1) according to claim 6, characterized in that the sealing element (51) is connected to the second edge section (500).

8. Drive device (1) according to claim 6 or 7, characterized in that the sealing element (51) integrally connected by means of two-component plastic injection molding to the cover body (50) or manufactured as a separate element and attached to the cover body (50).

9. Drive device (1) according to one of claims 6 to 8, characterized in that the drive wheel (6) has a rotary body (60) and an axially along the axis of rotation (D) of the rotary body (60) projecting collar (63), wherein the sealing element (51) cooperates sealingly with the collar (63).

10. Drive device (1) according to one of the preceding claims, characterized by a motor unit (8) having an electric motor (80) and a drive shaft (800) which can be driven by the electric motor (80).

11. Drive device (1) according to claim 10, characterized in that the drive shaft (800) has a drive worm (81) with a worm toothing.

12. Drive device (1) according to claim 10 or 11, characterized in that the drive wheel (6) with the drive shaft (800) is in gear connection and can be driven by the drive shaft (800).

13. Drive device (1) according to claim 12, characterized in that the output element (3) is formed by a cable drum (3) for moving a traction cable (10) connected to the vehicle part to be adjusted.

14. An assembly with a drive device (1) according to one of the preceding claims and a carrier element (4) to which the drive device (1) is connected, wherein the drive housing (7) together with the drive wheel (6) enclosed in the motor pot (70) ) and the gear cover (5) connected to the motor pot (70) on a first side of the carrier element (4) and that

Output element (3) are arranged on a second side of the carrier element (4).