WO2018046507A1

WO2018046507A1 - Drive device for a window opener, with a motor pot engaging in a carrier element

Info

Publication number: WO2018046507A1
Application number: PCT/EP2017/072275
Authority: WO
Inventors: Roland Kalb; Gabriele Lange
Original assignee: Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg
Priority date: 2016-09-06
Filing date: 2017-09-05
Publication date: 2018-03-15
Also published as: DE102016216881A1

Abstract

A drive device (1) for adjusting a cover element of a vehicle, in particular for a window opener mechanism, comprises a carrier element (4) which has a surface portion (40) extending along a plane (E), and a motor unit (8) which is arranged on the carrier element (4) and has a stator (83) and a rotor (84) which is rotatable with respect to the stator (83) and is operatively connected to a drive shaft (800), said stator and rotor being jointly enclosed in a motor pot (73). It is provided here that the motor pot (73) projects into an opening (441) in the surface portion (40) in such a manner that the motor pot (73) reaches through the plane (E) of the surface portion (40). A drive device which, while having a favourable operating behaviour and sufficient torque, can be constructed compactly is thereby provided.

Description

Drive device for a window lift, with a motor pot engaging in a carrier element

description

The invention relates to a drive device for adjusting a cover element of a vehicle, in particular for a window lifter device, according to the preamble of claim 1. Such a drive device comprises a support member having a surface portion extending along a plane, and arranged on the support member motor unit having a Stator and a rotatable to the stator, operatively connected to a drive shaft rotor, which are enclosed together in a motor pot comprises.

The drive device is advantageously used for adjusting a cover of a vehicle, in particular for a window regulator. The cover member may be a window glass, a sunroof, a tonneau cover, a tailgate, a sunblind, or a vehicle door for covering an opening or the like in a vehicle.

In a window lifter, for example, one or more guide rails can be arranged on an assembly carrier of a door module, on each of which a driver coupled to a window pane is guided. The driver is coupled via a slippery, designed for the transmission of (exclusively) tensile forces pull rope with the drive device, wherein the pull rope is arranged on a cable drum, that the pull rope with one end wound onto the cable drum during a rotational movement of the cable drum and with a unwinds the other end from the cable drum. Thus, there is a displacement of a cable loop formed by the pull rope and accordingly to a movement of the driver along the respective associated guide rail. Driven by the drive device, the window pane can thus be adjusted, for example, to release or close a window opening on a vehicle side door.

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

A drive device for a window lift, which is to be mounted on a support member in the form of a subframe of a door module on a vehicle side door and is thus enclosed within a vehicle side door, should have advantageous operating characteristics, in particular a smooth-running behavior with low vibration excitation on the support element and should also the take advantage of available space efficiently. There is a need for compact design of the drive device, but the drive device must provide sufficient torque to ensure reliable adjustment of the adjusting part to be adjusted, for example the window pane, possibly also in the case of sluggishness in the system, for example for running in in a seal or the like. In general, the available torque also depends on the size of the electric motor. Thus, an electric motor with a larger rotor diameter and / or with a larger rotor length can provide a larger torque available.

Object of the present invention is to provide a drive device available that can be constructed compact with favorable performance and sufficient torque. This object is achieved by an article having the features of claim 1. Accordingly, it is provided that the engine pot protrudes into an opening of the surface portion such that the engine pot passes through the plane of the surface portion.

The motor unit is formed by an electric motor having a fixed stator and a rotatable rotor. The motor unit is enclosed in a motor pot of the drive housing, wherein the motor pot protrudes into an opening in the surface portion of the support element. This allows a particularly compact design of the drive device in that the engine pot can be placed on the support member such that the motor pot passes through the surface portion of the support member. This makes it possible to lower the motor pot in the support element, so that the overall height of the drive device on the motor unit associated side of the support member can be reduced and the motor pot in particular does not extend beyond other housing sections of a drive housing on this side of the support member. The height of the drive device (measured along a normal direction perpendicular to the carrier element) is thus not determined by the motor pot, but the motor pot can be placed so that it along the normal direction, for. overlaps with a cable outlet housing and a drive housing and protrudes neither on the cable outlet housing on a first side nor on the drive housing on a side facing away from the first side, the second side of the support member along the normal direction.

The fact that the motor pot protrudes into the opening of the surface portion and thus - as viewed from the side of the support member on which the motor unit is arranged - at least partially can be sunk in the support member, an available for example within a vehicle door space can be efficiently utilized , This allows for a compact overall design of the drive device as a whole, because the motor unit can be placed on the support member so that it requires little additional space - beyond the example required for driving a window regulator gear parts - requires. This also makes it possible to choose the dimensions of the motor unit, in particular of the rotor and the stator so that results in a compact design, a favorable operating behavior of the engine. In particular, the countersinking of the motor unit in the carrier element, for example, allows the diameter of the motor unit to enlarge so that - with the same torque - the axial length of the motor unit can be shortened, which in addition can contribute to a compact design of the motor. Preferably, the carrier element has a shape which covers the opening in the surface portion. The molding may for example be integrally formed on the surface portion or may be formed as a separate element which is attached to the surface portion and sealed, for example via a seal against the surface portion. The support element can in this way (for example, if the drive device is designed as a drive for a window regulator and the support element is realized as a subframe of a door module) provide a moisture-tight separation between a wet room, for example, a vehicle side door and a drying room in which the motor unit is arranged ,

The carrier element, in particular the surface portion of the carrier element, may in this case be made of a metal or a plastic. In any case, it is possible to integrally mold the molding in the surface portion - for example, by deep drawing at a metal material or by plastic injection molding (for example, by injection molding) in a plastic material - or form as a separate element to the formation as a separate element to the surface portion to be set.

In a specific embodiment, the carrier element may be formed with its surface portion in particular of an organic sheet. An organic sheet is understood to mean a surface element made of a thermoplastic which has embedded fiber structures (scrim or knitted fabric) of fibers of great length (so-called endless fibers). Because, in such an organic sheet, forming to shape the molding on the surface portion may not be readily possible, in such an embodiment it may be provided to form the molding as a separate element.

In the formation of the motor pot is, wherein the molding is preferably formed complementary to the in-molding section of the motor pot. If, for example, the engine pot is essentially cylindrical in its basic form, then the molding has a corresponding shape, so that the molding can accommodate the engine pot in a space-saving manner. In one embodiment, the drive shaft connected to the rotor is at least partially enclosed in a housing section connected to the motor pot, the housing section rests in a further formation extending from the molding. The designed for example as a screw housing for receiving a arranged on the drive shaft drive screw housing section connects axially to the motor pot, for example, (also) cylindrical and has, for example, a smaller diameter than the motor pot. The further formation following the (first) formation is shaped to be complementary to the screw housing and at least partially accommodates it so that further housing sections of the drive device are sunk into the support element.

In one variant, the motor pot engaging in the opening of the surface section may itself be sealed off from the surface section and close the opening. In this case, can also be dispensed with a (formed on the surface portion or formed as a separate element) shaping.

In one embodiment, the drive device, for example, an output housing which at least partially surrounds an output element for adjusting the cover and is arranged on a first side of the support member, and a drive housing, which is part of the engine pot and which at least partially surrounds a drivable by the motor unit gear element and arranged on a second side of the carrier element facing away from the first side. The output element on the first side of the carrier element is used to transmit an adjusting force to the vehicle part to be adjusted. The gear element on the second side of the carrier element is in contrast driven by the motor unit and transmits an adjusting force to the output element. The carrier element can in this case provide a moisture-proof separation between a wet space on the first side and a drying space on the second side. The driven element can thus be arranged in the wet space, while the gear element and the motor unit operatively connected to the gear element can be located in the dry space. If the drive device, for example, part of a window regulator, thus the motor unit can be arranged in the dry space of a vehicle door, while the output element, for example a Cable drum, located in the wet room and there the vehicle part, such as a window pane to be adjusted, moves.

Preferably, the motor pot, viewed along a normal direction perpendicular to the surface portion, does not protrude beyond the output housing on the first side and / or beyond the drive housing on the second side. Along the normal direction, the motor pot thus does not determine the height of the drive device above the carrier element on the first side and / or on the second side. This is made possible by the countersinking of the motor pot in the opening of the carrier element and the passage through the carrier element and can contribute to a compact design of the drive device.

If the drive device e.g. serves for adjusting an adjusting part in the form of a window pane and is part of a window regulator, the drive device may for example have output element in the form of a cable drum which is rotatably mounted about an axis of rotation on the carrier element and adapted for adjusting an operatively connected to the vehicle part, for transmitting tensile forces Tension element, in particular a pliable pull rope, is used. Such a pull rope can be arranged with two ends on the cable drum, so that a closed loop of rope is formed, which can be adjusted by turning the cable drum. Thus, when the cable drum is rotated, the pull cable is wound onto the cable drum with one end and unwound from the cable drum with the other end, so that the freely extended length of the cable loop does not change and, for example, carriers guided on guide rails are moved to move a window pane.

In one embodiment it can be provided that the drive shaft of the motor unit is rotatable about a shaft axis, wherein the shaft axis is aligned at an oblique angle to the axis of rotation of the drive element.

In a conventional drive device for a window lifter, as is known, for example, from DE 10 2004 044 863 A1, the shaft axis of the drive shaft extends transversely to the axis of rotation of a cable drum. This arrangement of the drive shaft for cable drum limits the possibilities to place the motor unit of the drive device on the support element, so that in this way the available space is substantially predetermined. While conventionally the shaft axis has an angle of 90 ° to the axis of rotation of the output element, now the shaft axis of the drive shaft extends at an oblique angle, so our angle <90 °, for example an angle in a range between 85 ° and 65 °, for example between 80 ° and 70 °, to the axis of rotation. This provides an additional degree of freedom because it allows the motor unit to be adjusted in position relative to other components of the drive device, so that - in conjunction with the intervention in the opening of the surface portion - an available space can be efficiently utilized.

The gear element on the second side of the carrier element, which is enclosed by the drive housing, can be realized, for example, by a drive wheel which can be rotated about the axis of rotation of the output element and which is in operative connection with the output element on the first side of the carrier element. The drive wheel is, for example, in meshing engagement with the drive shaft of the motor unit. The drive shaft can in this case, for example, carry a drive worm, which has a worm toothing, which is in meshing engagement with an external toothing of the drive wheel. By rotating the drive shaft and, consequently, by rotating the drive worm, the drive wheel can thus be rotated and, via this, the driven element can be driven on the first side of the carrier element.

By tilting the shaft axis of the drive shaft relative to the axis of rotation of the drive element, which preferably also corresponds to the axis of rotation of the drive wheel, and the drive screw is inclined relative to the axis of rotation and thus extends obliquely relative to the drive wheel. In an advantageous embodiment, in this case, the inclination of the shaft axis may be just chosen so that the pitch angle of the worm gear corresponds to the angle between the shaft axis and a transversely (at an angle of 90 °) to the axis of rotation extending transverse axis. This makes it possible to form the toothing of the drive wheel as a straight toothing, which allows a favorable design of the drive wheel with simple, cost-effective production.

The pitch of a worm gear is generally understood to mean the axial stroke per circumferential length. The slope can be determined, for example, by the axial stroke per revolution divided by the circumferential length per revolution (which is the length of the path that is obtained when the Worm rolls linearly over one revolution). The pitch angle results directly from the slope.

In one embodiment, the output element is mounted on a first bearing element of a cable outlet housing on a first side of the support element, while the drive wheel is enclosed in a drive housing on a side facing away from the first side, second side of the support element and mounted on a second bearing element of the drive housing. The cable outlet housing and the drive housing can advantageously be fastened to one another via a fastening element acting between the first bearing element and the second bearing element, for example in the form of a screw. The output housing on the first side of the carrier element and the drive housing on the second side of the carrier element are thus clamped to one another axially via the fastening element acting centrally between the bearing elements. This allows a particularly simple mounting of the drive device by attaching the output housing to the first side of the support member and the drive housing to the second side of the support member, wherein the attachment of the output housing on the one hand and the drive housing on the other hand can be made to each other in a favorable manner via the central fastener. In this way, a wet-dry space separation provided by the carrier element (for example in the form of a subassembly of a door module) can be maintained in a simple manner, without the wet-dry space separation being adversely affected by the attachment of the output housing and the drive housing to one another. In one embodiment, the rotor can be designed as an external rotor rotating around the stator. In this design, the fixed stator is thus arranged radially inside the rotor. The rotor turns around the stator. The electric motor may in this case be designed, for example, as a brushless DC motor. In such a motor design stator windings are arranged on pole teeth of the stator, which are energized during operation of the motor. On the other hand, permanent magnets are arranged on the rotor, which provide an excitation field on the rotor. In operation, by electronic commutation of the current flowing through the stator windings, a rotating magnetic field circulates on the stator which generates a torque on the permanent-magnet excited motor. For example, the rotor may have six poles (corresponding to three pairs of permanent magnet poles), while the stator carries one or more stator windings, for example, at nine pole teeth. The idea underlying the invention will be explained in more detail with reference to the figures illustrated embodiments. Show it:

Fig. 1A is an exploded view of an embodiment of a

Driving device;

Fig. 1 B is the exploded view of Figure 1A, from another perspective.

Fig. 2 is a view of a cable outlet housing before attachment to a

Support member;

Fig. 3 is another view of the cable outlet housing before attachment to the

Support member; Fig. 4A is a plan view of the support element, at a the

Rope outlet housing facing, first side;

Fig. 4B is a sectional view taken along line A-A of Fig. 4A; Fig. 5 is a perspective view of the carrier element, on a

Drive housing facing the second side;

Fig. 6 is a separate, perspective view of the drive housing; Fig. 7A is a plan view of the drive housing;

Fig. 7B is a sectional view taken along line B-B of Fig. 7A;

8 is a side view of the drive device, with conventional alignment of a shaft axis of a drive shaft.

Fig. 9 is a side view of the drive device, with obliquely oriented

Shaft axis, according to a first variant; Fig. 10 is a side view of the drive device, with obliquely oriented

Shaft axis, according to a second variant; Fig. 1 1 is a fragmentary enlarged view of the arrangement of FIG. 10;

Fig. 12 is a schematic view of an adjusting device of a vehicle in

Form of a window regulator;

13 is a view of another embodiment of a carrier element, with a to be applied as a separate element to a surface portion of the support member molding;

FIG. 14 shows the view according to FIG. 13, with separately illustrated sealing element; FIG.

Fig. 15A is a view of the carrier element with attached thereto molding; and Fig. 15B is a sectional view taken along the line C-C of Fig. 15A.

1A, 1B to 7A, 7B 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 regulator, shown by way of example in FIG. 12, has, for example, a pair of guide rails 11, on each of which a driver 12, which is coupled to a window pane 13, is adjustable. Each driver 12 is coupled via a traction cable 10, which is designed for the transmission of (exclusively) tensile forces, with a drive device 1, wherein the traction cable 10 forms a closed cable loop and with its ends with an output element in the form of a cable drum 3 (see Example Fig. 1A and 1 B) of the drive device 1 is connected. The traction cable 10 extends from the drive device 1 to guide rollers 1 10 at the lower ends of the guide rails 1 1 to the drivers 12 and 12 of the drivers around pulleys 1 1 1 at the upper ends of the guide rails 1 1 back to the drive device 10th

In operation, a motor unit of the drive device 1 drives the cable drum 3 such that the pull cable 10 is wound with one end on the cable drum 3 and unwound with the other end of the cable drum 3. As a result, the cable loop formed by the traction cable 10 shifts without changing the freely extended Rope length, which causes the driver 12 to the guide rails 1 1 rectified moves and thereby the window glass 13 along the guide rails 1 1 is adjusted. The window lifter is arranged in the embodiment of FIG. 12 on a subframe 4 of a door module. The subframe 4 can be fixed, for example, on a door inner panel of a vehicle door and represents a preassembled unit that can be mounted on the vehicle door preassembled with arranged on the subframe 4 windows.

The drive device 1 of the embodiment according to FIGS. 1A, 1B through 7A, 7B is mounted on a surface portion 40 of e.g. arranged carrier element 4 realized by a subframe of a door module and has a arranged on a first side of the support member 4 cable outlet housing 2 and on a side facing away from the first side, second side of the support member 4 arranged drive housing 7. The cable outlet housing 2 serves to support the cable drum 3 on the support member 4, while the drive housing 7 includes, inter alia, a transmission element in the form of a drive wheel 6, which can be driven by a motor unit 8 and is in communication with the cable drum 3, so by Turning the drive wheel 6, the cable drum 3 can be driven.

The cable drum 3 on the first side of the carrier element 4 is arranged in a proper arrangement, for example on a vehicle door of a vehicle, in a wet space of the vehicle door. The drive housing 7 is in contrast in the dry space of the vehicle door. The separation between the wet room and the drying room is made by the carrier element 4, and accordingly, the interface between the drive wheel 6 and the cable drum 3 is sealed moisture-tight, so that no moisture can pass from the wet room in the drying room.

The cable outlet housing 2 has a bottom 20, a centrally projecting from the bottom 20, cylindrical bearing element 22 in the form of a bearing dome and radially to the bearing element 22 spaced housing sections 21 in the form of parallel to the cylindrical bearing element 22 extending housing webs. On the bearing element 22, the cable drum 3 is rotatably mounted and thereby edged by the cable outlet housing 2, that the cable drum 3 is held on the support member 4. The cable drum 3 has a body 30 and, on the circumferential surface of the body 30, a formed in the body 30 cable groove 300 for receiving the traction cable 10. With a ring gear 31, the cable drum 3 is inserted into an opening 41 of the support member 4 and rotatably connected to the drive wheel 6 so that a rotational movement of the drive wheel 6 leads to a rotational movement of the cable drum 3.

The drive housing 7 is attached with the interposition of a sealing element 5 to the other, second side of the support member 4 and has a housing pot 70 with a centrally formed therein bearing element 72 in the form of a cylindrical bearing dome, which passes through an opening 62 of the drive wheel 6 and the drive wheel. 6 rotatably supported in this way. To the housing pot 70 includes a worm housing 74, in which a drive worm 81 rests, which is rotatably connected to a drive shaft 800 of an electric motor 80 of the motor unit 8 and via a worm toothing with external teeth 600 of a body 60 of the drive wheel 6 is in meshing engagement. The drive shaft 800 is mounted in the worm housing 74 via a bearing 82 at its end facing away from the electric motor 80. The electric motor 80 is in this case in a motor pot 73 of the drive housing 7, which is closed by a housing cover 75 to the outside.

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

The drive wheel 6 has, axially projecting from the body 60, a connecting wheel 61 with an external toothing 610 formed thereon, which engages with the ring gear 31 of the cable drum 3 such that an internal toothing 310 of the ring gear 31 (see, for example, FIG 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 rotatably connected to each other, so that the cable drum 3 is rotatable by driving the drive wheel 6 on the support member 4. For mounting the drive device 1, the cable outlet housing 2 on the one hand to the support member 4 and the drive housing 7 on the other hand attached to the support member 4. The attachment to the carrier element 4 is then characterized in that a Fastener 9 is inserted in the form of a screw in an engagement hole 721 underside of the drive housing 7 such that the fastener 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 , About the fastener 9, the cable outlet housing 2 and the drive housing 7 are axially clamped to the bearing elements 22, 72 to each other and fixed above it on the support member 4. For assembly, the cable outlet housing 2 is attached to the first side of the support member 4, so that the cable outlet housing 2, the cable drum 3 borders and holds on the support member 4. The cable outlet housing 2 in this case comes with its radially to the bearing element 22 spaced housing sections 21 via foot sections 210 into contact with an abutment ring 45 which surrounds an opening 41 in the support member 4 circumferentially. At the abutment ring 45 axially projecting interlocking elements 42 are formed in the form of web-shaped pins which engage in attachment of the cable outlet housing 2 to the support member 4 with positive locking openings 212 (see FIG. 2) at the foot portions 210 of the housing sections 21 and in this way a Anti-rotation to create the defined by the bearing element 22 axis of rotation D between the cable outlet housing 2 and the support member 4.

On the inside of the positive locking elements 42 are recesses 420 created (see, for example, Fig. 3), engage in the attached rope outlet housing 2 locking elements 21 1 in the form of outwardly projecting locking lugs on the housing sections 21. About this locking connection, the cable outlet housing 2 is held together with the enclosed therein cable drum 3 on the support member 4 in a pre-assembly, even if the drive housing 7 is not yet clamped on the fastener 9 with the cable outlet housing 2. The latching connection thus simplifies the assembly and prevents falling of the cable outlet housing 2 with not yet mounted drive housing. 7

The cable drum 3 comes, in the pre-assembly, via radially projecting support members 32 at the upper edge of the ring gear 31 (see, for example, Fig. 1A) with a support ring 46 within the opening 41 of the support member 4 in support, so that the cable drum 3 in the pre-assembly not through the opening 41 can slip through and is held on the cable outlet housing 2 to the support member 4.

The support elements 32 are used in particular for securing the position of the cable drum 3 on the carrier element 4 in the pre-assembly. After complete assembly of the drive device 1, the cable drum 3 is connected via the ring gear 31 with the drive wheel 6 in conjunction and is axially fixed between the cable outlet housing 2 and the drive housing 7. On the inner sides of the housing sections 21 axially extending and radially inwardly projecting securing elements 23 are arranged, which face the cable groove 300 on the lateral surface of the body 30 and preferably slide during operation along this lateral surface. About this securing elements 23 ensures that the recorded in the rope groove 300 pull rope 10 can not jump out of the cable groove 300.

The drive housing 7 is attached to the other, second side of the support member 4 such that the motor pot 73 engages in an opening 441 in the surface portion 40 and in a molded integrally with the surface portion 40 44 in the forming portion 40 and the screw housing 74 in a adjoining further formation 440 comes to lie in the surface section 40 (see FIGS. 1A, 1B and 2). The surface portion 40 is flat along a plane E extends. From this plane E, the axially adjoining formations 44, 440 project in the direction of the rope outlet housing 2.

When attaching the drive housing 7 reach fasteners 71 in the form of engaging bushes molded therein with positive engagement openings 710 with the underside of the support member 4 above positive locking elements 43 in the form of pins in engagement. Characterized in that the positive-fit openings 710 of the fastening means 71 as well as the interlocking elements 43 are spaced in the form of the pins on the support member 4 radially to the created by the bearing member 72 of the drive housing 7 axis of rotation D, by this positive engagement, the drive housing rotationally fixed to the support element set so that a rotation lock for the drive housing 7 is provided.

At the interlocking elements 43 of the support member 4 engaging portions 51 are arranged on a sealing ring 50 of the sealing element 5, so that the positive engagement the positive locking elements 43 with the form-locking openings 710 on the fastening devices 71 takes place with the interposition of the engagement sections 51. This is for acoustic decoupling. On the sealing element 5, a curved portion 52 is formed, which comes to rest in the region of the formation 440 for receiving the worm housing 74. The curved section 52 forms an intermediate layer between the worm housing 74 and the carrier element 4, so that an acoustic decoupling of the drive housing 7 from the carrier element 4 is also achieved via this.

If the drive housing 7 has been attached to the carrier element 4 with the interposition of the sealing element 5, then the drive housing 7 is clamped to the cable outlet housing 2 via the fastening element 9, so that the cable outlet housing 2 and the drive housing 7 are fixed to one another and to the carrier element 4. As can be seen from FIGS. 1A and 1B, the fastening element 9 is inserted into the engagement opening 721 within the bearing element 72 of the drive housing 7, with the result that the fastening element 9 with a shaft 90 passes through the opening 720 on the head of the bearing element 72 and into the opening 221 of the bearing element 72 Bearing element 22 of the cable outlet housing 2 engages. A head 91 of the fastening element 9 comes to lie here on the side facing away from the bearing element 22 of the opening 720, so that the cable outlet housing 2 is clamped to the drive housing 7 by screwing the fastening element 9 into the opening 221 within the bearing element 22. The bearing element 22 of the cable outlet housing 2 and the bearing element 72 of the drive housing 7 in this case create a common axis of rotation D for the cable drum 3 on the one hand and the drive wheel 6 on the other hand, so that the cable drum 3 and the drive wheel 6 in operation coaxial with each other and can rotate together.

In the embodiment according to FIGS. 1A, 1B to 7A, 7B, the drive shaft 800 of the electric motor 80 is mounted so as to be rotatable about a shaft axis W relative to the drive housing 7. As can be seen from the sectional view of FIG. 4B, the electric motor 80 is hereby connected by a stator 83 which carries a plurality of stator windings 830 (schematically indicated in FIG. 4B) on pole teeth and a rotor 84 which carries a plurality of permanent magnets 840 , educated. The rotor 84 is an external rotor and runs radially outward of the stator 83. The rotor 84 is rotatably connected to the drive shaft 800, which is rotatably mounted in a bush-shaped bearing member 85 to the stator 83. For example, the electric motor 80 may have six, nine, twelve, fifteen, eighteen, twenty-one, or twenty-four pole teeth with stator windings 830 disposed thereon at its stator 83. During operation of the electric motor 80, the stator windings 830 are energized in an electronically commutated manner, so that a rotating field rotates on the stator 83. The rotating field cooperates with a field of excitation generated by the permanent magnets 840 (with, for example, four, six, eight, ten, twelve, fourteen, or sixteen magnetic poles) on the rotor 84 to generate a torque such that the rotor 84 rotates about the stator 83 is offset.

The bearing element 85 has a first shank portion 850, which is cylindrical and protrudes into the stator 83. In contrast, a second cylindrical shaft section 851 protrudes into the screw housing 74 and is pressed, for example, with the screw housing 74, so that the stator 83 is held in position on the drive housing 7 via the bearing element 85. Within the bearing element 85, the drive shaft 800 is rotatably mounted.

As can be seen from the sectional view according to FIG. 4B, the shaft axis W extends at an angle to the axis of rotation D of the cable drum 3 and the drive wheel 6. This creates an additional degree of freedom in the arrangement of the electric motor 80 on the carrier element 4, which can contribute to a compact design of the drive device 1.

This will be illustrated with reference to FIGS. 8-10.

Fig. 8 shows a conventional arrangement in which the shaft axis W is transverse to the axis of rotation D. Because the drive worm 81 is to be arranged at the same height as the drive wheel 6, this results in the electric motor 80 enclosed in the motor pot 73 having a comparatively large height H1 on the second side of the support element 4, which reduces the installation space on the second side of the support element Carrier element 4 determined. In particular, the height H1 of the motor pot 73 is greater than the height H of the electronics housing 76. The overall height H3 of the drive device 1 (measured via the drive housing 7 and the cable outlet housing 2) is greater than that via the electronics housing 76 and the cable outlet housing 2 measured height H2 is. If, as in the embodiment of FIG. 1A, 1 B to 7A, 7B corresponding variant of FIG. 9, the shaft axis W extends at an oblique angle to the axis of rotation D, this allows the electric motor 80 in the direction of the cable outlet housing 2 offset that the motor pot 73 on the second side of the support member 4 does not protrude beyond the electronics housing 76. The height of the motor pot 73 on the second side can thus correspond to the height H of the electronics housing 76, so that the motor pot 73 does not require any additional installation space (along the normal direction perpendicular to the carrier element 4). The result is a total height H2 of the drive device 1, which is (exclusively) determined by the height of the cable outlet housing 2 and the electronics housing 76.

In the variant according to FIG. 9, there is a spacing A along the normal direction (perpendicular to the carrier element 4) between the upper edge of the formation 44, in which the motor pot 73 rests, and the upper edge of the bottom 20 of the cable outlet housing 2. There is thus additional installation space, which can be exploited for increasing the diameter of the electric motor 80, as shown in Fig. 10 is illustrated.

Thus, the diameter of the electric motor 80, determined by the designed as an external rotor rotor 84, be increased such that the upper edge of the formation 44 is at the same height as the top of the bottom 20 and thus the total height of the required space for the electric motor 80 (determined by the height of the formation 44 on the first side of the support element 4 and the height H of the motor pot 73 on the second side of the support element 4) the total height H2 of the cable outlet housing 2 and the electronics housing 76 corresponds. The increase in the rotor diameter 84 makes it possible to reduce the axial length (as viewed along the shaft axis W) of the electric motor 80 and the drive shaft 800, so that the increase in diameter at a constant torque makes it possible to reduce the axial length of the electric motor 80. The motor pot 73 enclosing the electric motor 80 lies in the formation 44 on the carrier element 4. Because the formation 44 extends into the space of the cable outlet housing 2 on the first side of the carrier element 4 and protrudes from the surface portion 40, the motor pot 73 - pictorially speaking and viewed from the second housing side of the carrier element 4 assigned to the drive housing 7 from considered - are sunk into the support member 4 inside. Together with the oblique orientation of the shaft axis W and the magnification of the Diameter of the electric motor 80 allows a particularly compact design of the drive device. 1

In a particularly advantageous embodiment, the inclination of the shaft axis W relative to the rotation axis D may be just chosen so that the pitch angle ß of the worm gear 810 of the drive worm 81 just corresponds to the angle which describes the shaft axis W to a transversely to the rotation axis D facing transverse axis Q, as shown in Fig. 1 1. This makes it possible to form the external toothing 600 of the drive wheel 6 as a straight toothing (with tooth tips extending straight parallel to the axis of rotation), which makes possible a simple, cost-effective production of the drive wheel 6 in comparison with conventional helical toothing. The inclination of the shaft axis W can thus not only be advantageous for the installation space, but at the same time enable a simple, cost-effective production of the drive wheel 6.

As can be seen from FIG. 11, the shaft axis W describes an angle α relative to the axis of rotation D. The angle β corresponds to an amount of 90 ° -a.

The drive worm 81 may, for example, be formed integrally with the drive shaft 800. It is also conceivable and possible, however, to arrange the drive worm 81 in a rotationally fixed manner as an additional, separate component on the drive shaft 800.

In the drive device 1, the cylindrical motor pot 73 is at least partially sunk in the surface portion 40 of the support member 4 by the motor pot 73, the opening 441 of the surface portion 40 passes through and rests in the formed on the surface portion 40 44 formation. Together with the oblique orientation of the shaft axis W of the drive shaft 800, this allows a particularly compact design of the drive device 1, in which, as explained with reference to FIGS. 8A to 8C, a reduction in the overall height of the drive device 1 and also a reduction in the axial length of the motor unit 8 can be achieved with favorable operating behavior and in particular sufficient torque during operation.

In the exemplary embodiments described above, the formation 44, just like the further formation 440 axially adjoining the formation 44, for receiving the screw housing 74, is formed integrally with the surface section 40 of the carrier element 4. The formation 44 is in this case shaped to be complementary to the shape of the engine pot 73 as a cylinder portion and thus can the engine pot 73rd accommodate space-saving. Likewise, the axially subsequent formation 44 is formed as a cylindrical portion and receives the worm housing 74 in a complementary manner.

The surface portion 40 is just along the plane E extends. The formation 44 as well as the further formation 440 protrude out of this plane in the direction of the cable outlet housing 2, so that the engine unit 8 is partially sunk into the support element 4 via the formation 44 and the further formation 440 which is axially adjacent thereto. In an embodiment shown in FIGS. 13 to 15A, 15B, the formation 44 is formed as a separate element and attached to the surface portion 40 of the support member 4 such that the formation 44 engages through the opening 441 in the surface portion 40. The formation 44 is in this case with a circumferential edge 443 on the engine unit 8 side facing the support member 4, wherein between the edge 443 and the surface portion 40, a circumferential sealing element 442 comes to rest, which is the transition between the formation 44 and the surface portion 40th sealed watertight. The wet-dry space T rennung, which is provided by the support member 4 is thus not affected by the formation 44.

In the embodiment shown in FIGS. 13 to 15A, 15B, the formation 44 is formed as a separate element, whereas the axially adjacent formation 440 for receiving the screw housing 74 is not. This is integrally formed with the surface portion 40 and formed to form the (obliquely to the rotation axis D extend) screw housing 74.

A molding 44 in the form of a separate element may be useful, in particular, if the carrier element 4 is made, for example, from a metal sheet or from a so-called organic sheet. By using a separate (plastic) element for the molding in this case, the production of the support member 4 can be simplified.

The idea underlying the invention is not limited to the embodiments described above, but can in principle also be implemented in a completely different manner. A drive device of the type described is in particular not limited to the use of a window lift, but can also serve to adjust another adjustment element, such as a sunroof or the like, in a vehicle.

The drive device can be mounted in a simple manner, in particular using a (single) axially bracing fastener. This results in a mounting in a few assembly steps, which can be simple and inexpensive with reliable determination of the cable outlet housing and the drive housing to the support element.

LIST OF REFERENCE NUMBERS

1 drive device

10 rope

1 1 guide rail

1 10, 1 1 1 deflection

12 drivers

13 window pane

2 cable outlet housing

20 floor

200, 201 Structural element (stiffening rib)

202 recess (material weakening)

21 housing section

210 foot section

21 1 locking element

212 positive opening (slot opening)

22 bearing element (bearing dome)

220 centering cone

221 opening

23 fuse element

3 cable drum

30 bodies

300 rope groove

31 ring gear

310 toothing

32 support element

4 carrier element (subframe)

40 area section

41 opening

42 positive locking element

420 recess

43 positive locking element

44 shaping

440 shape

441 opening

442 seal

45 investment ring 46 support ring

5 sealing element

50 sealing ring

51 engagement section

52 Curved section

6 drive wheel

60 bodies

600 external teeth

61 connecting wheel

610 toothing

62 opening

7 drive housing

70 housing pot

71 fastening device (engaging bushing)

710 positive opening

72 bearing element (bearing dome)

720 opening

721 engagement opening

722 centering intervention

73 engine pot

74 screw housing

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

810 worm toothing

82 bearings

83 stator

830 stator windings

84 rotor

840 magnet

85 bearing element 850, 851 shaft section 9 fastening element

90 shaft

91 head

α, ß angle

A distance

D rotation axis

E level

H, H1, H2 height

Q transverse axis

W shaft axis

Claims

claims

First drive device (1) for adjusting a cover of a vehicle, in particular for a window regulator, with

a support member (4) having a surface portion (40) extended along a plane (E), and

a motor unit (8) arranged on the support element (4) and comprising a stator (83) and a rotor (84) operatively connected to a drive shaft (800) and rotatable with the drive (83), which are jointly enclosed in a motor pot (73) are, characterized in that the motor pot (73) projects into an opening (441) of the surface portion (40) such that the motor pot (73) passes through the plane (E) of the surface portion (40).

2. Drive device (1) according to claim 1, characterized in that the carrier element (4) has a formation (44) which covers the opening (441).

3. Drive device (1) according to claim 1 or 2, characterized in that the formation (44) is integrally formed on the surface portion (40).

4. Drive device (1) according to claim 1 or 2, characterized in that the formation (44) is formed as a separate element and attached to the surface portion (40).

5. Drive device (1) according to claim 4, characterized in that the forming (44) forming, separate element via a seal (442) relative to the surface portion (40) is sealed.

6. Drive device (1) according to one of claims 2 to 5, characterized in that the formation (44) complementary to a in the formation (44) inlaid portion of the motor pot (73) is formed.

7. Drive device (1) according to claim 6, characterized in that the motor pot (73) has a substantially cylindrical shape

8. Drive device (1) according to one of claims 2 to 7, characterized in that the drive shaft (800) is at least partially enclosed in a housing connected to the motor pot (73) housing portion, wherein the housing portion in one of the formation (44) extended , further shaping (440) rests.

9. Drive device (1) according to claim 1, characterized in that the motor pot (73) closes the opening (441).

10. Drive device (1) according to one of the preceding claims, characterized by

an output housing (2) which at least partially surrounds an output element for adjusting the cover element and is arranged on a first side of the support element (4), and

a drive housing (7) whose component is the motor pot (73) and which at least partially surrounds a transmission element drivable by the motor unit (8) and is arranged on a second side of the carrier element (4) facing away from the first side.

1 1. Drive device (1) according to claim 10, characterized in that the carrier element (4) provides a moisture-tight separation between a wet space on the first side and a drying space on the second side.

12. Drive device (1) according to claim 10 or 1 1, characterized in that the motor pot (73), viewed along a normal direction perpendicular to the surface portion (40), not via the output housing (2) on the first side and / or over the Drive housing (7) protrudes on the second side.

13. Drive device (1) according to one of claims 10 to 12, characterized in that the output element about a rotational axis (D) is rotatably arranged on the carrier element (4).

14. Drive device (1) according to claim 13, characterized in that the output element is a cable drum (3) for adjusting a with the vehicle part (13) operatively connected to the tension element (10).

15. Drive device (1) according to claim 13 or 14, characterized in that the drive shaft (800) about a shaft axis (W) is rotatable, wherein the shaft axis (W) of the drive shaft (800) at an oblique angle (a) to the Rotary axis (D) of the output element is aligned.

16. Drive device (1) according to one of claims 10 to 15, characterized in that the transmission element is a drive wheel (6) which is operatively connected to the output element and with the drive shaft (800) in

Gear engagement is.

17. Drive device (1) according to claim 16, characterized by a on the drive shaft (800) arranged drive screw (81) having a with a

Gearing (600) of the drive wheel (6) in gear meshing worm gear (810).

18. Drive device (1) according to claim 17, characterized in that the worm toothing (810) has a pitch angle equal to the angle (ß) between a transverse to the axis of rotation (D) extending transverse axis (Q) and the shaft axis (W).

19. Drive device (1) according to claim 17 or 18, characterized in that the toothing (600) of the drive wheel (6) is designed as a straight toothing.

20. Drive device (1) according to one of claims 10 to 19, characterized in that the output element on a first bearing element (22) of the

Starting housing (2) on the first side of the support element (4) and the drive wheel (6) on a second bearing element (72) of the drive housing (7) on the side facing away from the first side, second side of the support member (4) is mounted.

21. Drive device (1) according to claim 20, characterized in that the output housing (2) and the drive housing (7) via a between the first bearing element (22) and the second bearing element (72) acting

Fastener (9) are fastened together.

22. Drive device (1) according to one of the preceding claims, characterized in that the rotor (84) is designed as a radially outside of the stator (83) rotating external rotor.