Door drive device for electrodynamic adjustment of vehicle door

Abstract

The utility model relates to door driving equipment (2) for electrically adjusting a vehicle door (11). The door driving equipment comprises an electric motor (20); a transmission device (21) which can be driven by the electric motor (20); an output element (24) which is operatively connected to the transmission (21), can be rotated about a longitudinal axis (L2) relative to the housing part (230), and is used for outputting a torque for adjusting the vehicle door (11); a stationary section (3); and a hinge element (4) which can be pivoted relative to the stationary section (3). A centering device (30) is arranged on the stationary section (3) or on the hinge element (4) for centering the housing part (30) of the transmission (23) relative to the stationary section (3) and / or the hinge element (4) with respect to the longitudinal axis (L2).

Description

TECHNICAL FIELD

[0001] The utility model relates to a door drive device for electrically adjusting a vehicle door. BACKGROUND

[0002] The door drive device is used for adjusting a vehicle door relative to a vehicle body, in particular for adjusting a vehicle side door.

[0003] The door drive device comprises an electric motor, a transmission which can be driven by the electric motor, and a driven element. The driven element can be rotated about a longitudinal axis and is in operative connection with the transmission for outputting a torque for adjusting the vehicle door. The housing part is firmly connected to a stationary section. The hinge element can be swung relative to the stationary section, wherein the driven element can be placed in connection with the hinge element in a torsion-resistant manner for outputting the torque.

[0004] The door drive device described in DE 10 2015 215 627 A1 has an adjustment part of the type with a limiting belt, which can be hingedly connected to the vehicle body and can be adjusted via a drive device on the vehicle door side in order to move the vehicle door relative to the vehicle body in this way. The drive device has a cable drum, which can be rotated and is connected to the adjustment part in the form of a limiting belt via a transmission element in the form of a traction cable, so that by rotating the cable drum the adjustment part can be moved towards the cable drum and the vehicle door can thus be adjusted.

[0005] A door drive device with a switching device for establishing an operative connection between two components is known from DE 10 2017 230 151 A1, which comprises at least one adjustable switching element in order to switch the switching device between different switching states. The drive device has a planetary transmission which is driven via a worm gear transmission.

[0006] A door drive device with a planetary transmission for driving a driven element is known from DE 10 2022 114 432 A1.

[0007] The door drive device can be firmly arranged on the vehicle door, for example. Correspondingly, the stationary section can be formed on the vehicle door, for example, wherein for assembly the housing part needs to be connected to the stationary section. The stationary section here together with the hinge element forms a hinge about which the vehicle door can be pivoted, wherein the driven element is in connection with the hinge element in a functioning condition in order to introduce a torque into the hinge element and thus adjust the vehicle door relative to the vehicle body.

[0008] The hinge element is usually supported on a stationary section and can be pivoted relative to the stationary section. In operation, it must be ensured that the driven element is connected to the hinge element in a defined, centred manner and that lateral forces, i.e. forces acting transversely to a longitudinal axis corresponding to the axis of rotation of the driven element, are avoided as far as possible on the driven element. Utility model content

[0009] The task is to provide a door drive device which reliably transmits torque to a hinge element for adjusting a vehicle door.

[0010] The task is solved by a door drive device for electrically adjusting a vehicle door according to the invention, which has

[0011] an electric motor,

[0012] a transmission which can be driven by the electric motor, the transmission having a first housing part,

[0013] a driven element which is in operative connection with the transmission and can be rotated relative to the first housing part about a longitudinal axis, the driven element serving to output torque for adjusting the vehicle door,

[0014] a stationary section, the first housing part being firmly connected to the stationary section, and

[0015] a hinge element which can be pivoted relative to the stationary section, wherein the driven element can be placed in connection with the hinge element in a torsion-proof manner for outputting torque,

[0016] wherein, according to the invention, a centring device is provided which is arranged on the stationary section or the hinge element and serves to centre the first housing part relative to the stationary section and / or relative to the hinge element about the longitudinal axis.

[0017] The door drive device thus has a centring device which is arranged on the stationary section or the hinge element and serves to centre the housing part relative to the hinge element about the longitudinal axis.

[0018] The driven element can be placed in connection with the hinge element which can be pivoted relative to the stationary section in order to introduce torque into the hinge element in operation and thus to cause adjustment of the vehicle door relative to the vehicle body.

[0019] For example, the door drive device can be firmly arranged on the vehicle door side in a prescribed assembled condition. In this case, the hinge element is connected to the vehicle body and is in operative connection with the driven element in a condition which corresponds to operation, so that torque can be introduced between the vehicle door and the vehicle body via the door drive device in order to electrically adjust the vehicle door relative to the vehicle body.

[0020] The transmission of the door drive device has a housing, which, for example, encloses the facilities for the planetary transmission, for example, the transmission gears. In the assembled condition, the housing part is firmly connected to the stationary section, so that the transmission is fixed to the stationary section and the door drive device is thereby supported on the stationary section. The driven element, which can be rotated relative to the housing part about a longitudinal axis, is connected to the hinge element in the assembled condition in accordance with the function, so that by the rotation of the driven element the hinge element can be moved relative to the stationary section and thus a torque for adjusting the vehicle door is generated.

[0021] In operation, the driven element can be rotated relative to the housing part about the longitudinal axis. The driven element is connected to the hinge element in such a way that the hinge element is moved about the longitudinal axis when the driven element is rotated.

[0022] In operation, the driven element should be subjected to as little lateral force as possible in order to keep the load on the driven element transverse to the longitudinal axis about which the driven element can be rotated as low as possible and to avoid it as much as possible. In order to avoid an overloading of the driven element as a result of the relative force between the driven element and the hinge element, a centering device is arranged on the stationary section or on the hinge element, which is designed to center the housing part relative to the stationary section and / or relative to the hinge element about the longitudinal axis. Via the centering device it is ensured that the driven element is in a centered position relative to the hinge element in the assembled condition, so that in operation no lateral forces occur as a result of a non-centered position of the driven element relative to the hinge element. An overloading of the driven element relative to the hinge element is thereby avoided and an overloading of the driven element at the section in which it is in engagement with the hinge element is prevented.

[0023] The centering device can be formed, for example, on the stationary section. Correspondingly, the housing part is centered relative to the stationary section transverse to the longitudinal axis, i.e. in a plane perpendicular to the longitudinal axis, via the centering device on the stationary section.

[0024] In another design variant, the centering device can also be arranged on the hinge element, so that the housing part is centered relative to the hinge element directly via the centering device.

[0025] The cooperation between the centering device and the housing part preferably has (significantly) smaller clearances and lower tolerances than the cooperation of the driven element relative to the hinge element.

[0026] In the case of a functioning condition, the housing part is firmly connected to the stationary section, for example screwed. Here, via the centering device, centering along a plane perpendicular to the longitudinal axis is already established before a firm connection between the housing part and the stationary section is established, so that the connection of the housing part to the stationary section is ensured in such a way that the driven element is centered relative to the hinge element in operation, so that tolerances in the position of the driven element relative to the hinge element are reduced and assembly is simplified by the centering of the housing part relative to the stationary section and the hinge element by the centering device.

[0027] In one design, the centering device extends along a circular line about the longitudinal axis. For example, the centering device can be formed by a protrusion that extends annularly along a circular line about the longitudinal axis. In another design, the centering device can have, for example, a plurality of arcuately curved centering elements that extend along a circular line about the longitudinal axis. The housing part can be placed in a nest with the centering device, so that the centering of the housing part and thus of the driven element relative to the hinge element is ensured thereby.

[0028] In one design, the housing part has a housing section that is concentric with the longitudinal axis, which is nested in the centering device in the case of assembly and is supported on the centering device along a plane perpendicular to the longitudinal axis. The housing part can have, for example, a substantially cylindrical basic shape. The housing section can project axially along the longitudinal axis from a cylindrical base body of the housing part. The housing part can be placed in a nest with the centering device via the housing section, in order to establish the centering between the housing part and the centering device and thus relative to the hinge element in this way.

[0029] In one design, the driven element has a form-locking section for outputting torque. Correspondingly, the hinge element has a form-locking opening. The form-locking section can be placed in a nest with the form-locking opening for establishing the connection between the driven element and the hinge element in order to transmit torque to the hinge element in operation. The form-locking section can be formed, for example, by a toothing. The form-locking opening is formed complementarily to the form-locking section, so that a torque-resistant connection between the driven element and the hinge element is provided by the form-locking section being nested in the form-locking opening.

[0030] Based on the centering device, the driven element is centered relative to the hinge element in such a way that the form-locking section is nested in the form-locking opening in a prescribed manner and no excessive surface pressure occurs between the form-locking section and the hinge element, so that transverse forces are avoided from the outset based on the centering via the centering device.

[0031] In one embodiment, the form-fitting section is at least section-wise covered with a spacer layer made of a material that is softer than the material of the form-fitting section. The spacer layer can be formed, for example, from a plastic material such as polypropylene (PP). By means of the spacer layer, a (additional) centering between the form-fitting section and the hinge element is achieved in such a way that, in particular, the spacing between the form-fitting section and the hinge element in the form-fitting opening is adjusted at the time of assembly. The material of the spacer layer is preferably much softer than the material of the driven element, which is made of steel, for example. The material of the spacer layer is, for example, more than 50 times, preferably more than or equal to 100 times, as soft as the material of the form-fitting section.

[0032] The spacer layer serves, in particular, to achieve a centering directly between the driven element and the hinge element at the time of assembly in addition to the centering action of the centering device. The spacer layer on the form-fitting section achieves a position of the form-fitting section at the time of assembly that is centered within the form-fitting opening of the hinge element. Via the spacer layer, a defined gap between the form-fitting section and the inner wall surrounding the form-fitting opening is adjusted, which gap corresponds (approximately) to the thickness of the spacer layer. Thus, at the time of assembly, the driven element is directly centered in the form-fitting opening. By subsequently fixing the housing part to the stationary section, this centered condition is then fixed, so that in operation the driven element is centered with respect to the hinge element and thus lateral forces due to a non-centered position of the driven element with respect to the hinge element, in particular a non-centered position of the form-fitting section within the form-fitting opening, are even less likely to occur.

[0033] If lateral forces occur in operation due to a non-circular movement of the driven element, an elastic deformation of the spacer layer occurs, the spacer layer is pushed aside and flows aside due to the acting force.

[0034] In particular, by means of the spacer layer, a distance between the form-fitting section and the hinge element in the form-fitting opening can be adjusted, which distance corresponds approximately to the material thickness of the spacer layer. Thus, a rotational load acting on the form-fitting section can be balanced in the peripheral direction about the longitudinal axis, so that an excessive local surface pressure on the form-fitting section is avoided.

[0035] In one embodiment, the spacer layer extends on the form-fitting section peripherally about the longitudinal axis. Thus, the spacer layer extends peripherally on the form-fitting section.

[0036] In one embodiment, the spacer layer has openings. By means of these openings, in which the material of the spacer layer is left empty and which have a cross section that is, for example, rectangular or circular, the flow properties of the spacer layer can be adjusted in such a way that the material of the spacer layer can be pushed aside when a force acts on it.

[0037] In one embodiment, a centering pin is provided, which is configured to center the driven element and the hinge element relative to the longitudinal axis with respect to one another.

[0038] Such a centering pin is to act between the driven element and the hinge element. Such a centering pin can be arranged, for example, on the end of the driven element facing away from the housing part and is to be inserted into the associated centering opening on the hinge element, for example on the bottom of the form-locking opening, in order to thereby adjust the centering of the driven element with respect to the longitudinal axis.

[0039] The centering pin is to act, in particular, during assembly, in which the centering between the driven element and the hinge element is to be adjusted. When the driven element is placed onto the hinge element, the driven element and the hinge element are centered with respect to one another by means of the centering pin with respect to the longitudinal axis, so that the centering of the driven element and the hinge element is adjusted by the interlocking. The influence of lateral forces, which arise as a result of the non-centered interlocking of the driven element and the hinge element, is thereby avoided.

[0040] Such a centering pin can realize the centering device. However, such a centering pin can also be provided in addition to a centering device which acts between the housing part and the stationary section or the hinge element.

[0041] In one embodiment, the centering pin is arranged concentrically with respect to the longitudinal axis. A preferably cylindrically shaped centering pin can be inserted, for example, into the opening on the driven element and the opening on the hinge element, and is thereby arranged concentrically with respect to the longitudinal axis. The fit between the centering pin and the driven element on the one hand and the hinge element on the other hand is thereby designed to be low-tolerance, so that the centering between the driven element and the hinge element can be adjusted, in particular, during assembly, via the centering pin.

[0042] In one embodiment, the centering pin is formed from a resilient material. The centering pin can be formed, for example, from a plastic material or a soft, for example spring-elastic, metal material, such as a soft metal sheet. The background is that the centering pin is to act, in particular, during assembly, in order to adjust the centering between the driven element and the hinge element when the driven element is placed on the hinge element, in order to avoid lateral forces between the driven element and the hinge element during operation. Correspondingly, the centering pin is not to cause the driven element to be supported on the hinge element during operation, which would lead to an over-centering with respect to the support of the driven element.

[0043] In one embodiment, the centering pin is inserted into a centering opening on the hinge element in the assembled state and thereby adjusts the centering between the driven element and the hinge element. The centering opening can be formed, for example, on the bottom of the form-locking opening of the hinge element.

[0044] Since the centering pin is to act for centering, in particular during assembly, but not during operation, and thus in principle is to be deactivated after the door drive device is finally secured to the stationary section, it can be provided that the centering pin is removed from the centering opening after assembly. To this end, the centering opening can be shaped, for example, as a through-opening on the hinge element, so that the centering opening can be accessed from the side of the hinge element facing away from the support element and thus the centering pin can be pulled out of the centering opening and thus removed after assembly.

[0045] In one design variant, the fastening plate is firmly connected to the housing part, which can be connected to the stationary section via the fastening plate. The fastening plate can be arranged, for example, as a separate element on the housing part and be screwed to the housing part, for example. However, the fastening plate can also be integrally formed on the housing part. In this case, the fastening plate can be firmly connected to the stationary section, for example, by screwing the fastening plate to the stationary section.

[0046] In one design variant, the fastening plate is positioned relative to the housing part via at least one positioning pin, in particular during assembly and before the fastening plate is finally secured to the housing part. The at least one positioning pin is inserted into an opening of the fastening plate and an opening of the housing part and thereby positions the fastening plate relative to the housing part with respect to a plane perpendicular to the longitudinal axis. Via the positioning pin, a defined condition of the fastening plate relative to the housing part can be adjusted with low tolerances.

[0047] In one design variant, the at least one positioning pin is inserted into the opening of the fastening plate and the opening of the housing part in a press fit. Thus, the positioning pin is pressed into the opening of the fastening plate and the opening of the housing part and thereby positions the fastening plate relative to the housing part.

[0048] In one design variant, the opening of the fastening plate and / or the opening of the housing part is shaped as a through-opening. For example, the opening of the fastening plate passes through the fastening plate. Likewise, the opening of the housing part can pass through a wall of the housing part. The positioning pin is thereby pressed into the aligned opening of the housing part and the fastening plate and thereby positions the fastening plate on the housing part.

[0049] Since the opening of the fastening plate and the opening of the housing part are preferably shaped as through-openings, respectively, so that the entire wall thickness of the housing part and the entire wall thickness of the fastening plate contribute to the press fit of the positioning pin. This enables an improved force transmission between the housing part and the fastening plate via the positioning pin, while being reliably supported even in the case of high impact forces.

[0050] If the opening of the fastening plate and the opening of the housing part are shaped as through openings, respectively, it must be ensured that moisture does not penetrate into the interior of the housing part through these openings. For this reason, in one design variant at least one sealing element is provided, which is arranged between the housing part and the fastening plate and seals the transition between the at least one positioning pin, the fastening plate and the housing part. The at least one sealing element can for example extend peripherally around the at least one positioning pin and can for example have the form of a thermoplastically deformable O-ring. When the fastening plate is connected with the housing part, the sealing element is for example pressed between the fastening plate and the housing part and is thereby plastically deformed and in this way seals the transition between the positioning pin, the fastening plate and the housing part against moisture.

[0051] In one design variant, in the assembled state the fastening plate is connected with the stationary section via at least one fastening element. For example, the fastening plate can for example be screwed with the stationary section via one or more fastening elements in the form of screws.

[0052] In one design variant, the fastening plate is connected with the stationary section via at least one fastening element, so that the fastening plate can be inclined relative to the stationary section. This fastening makes it possible for there to be a certain movability between the fastening plate and the stationary section, so that, for example, in the event of a transverse force, a positional compensation can take place between the fastening plate and the stationary section and between the housing part and the stationary section as a result of the movability. In this way, tolerances can be compensated for and excessive surface pressure on the driven element can be avoided.

[0053] In one design variant, the at least one fastening element acts between the fastening plate and the stationary section in an axial direction parallel to the longitudinal axis. As a result of the at least one fastening element, the fastening plate is thus pressed axially against the stationary section. It can be provided here that the at least one fastening element is supported on the fastening plate or the stationary section via a spring element, so that there is a spring elasticity in the connection and as a result, for example, an inclination between the fastening plate and the stationary section can be achieved for a tolerance compensation.

[0054] For example, the fastening element can pass through a fastening opening on the fastening plate and be screwed into a screw opening on the stationary section. The spring element can here for example act between the head of the fastening element, which is configured as a screw element, and the fastening plate and thus cause the fastening element to be elastically supported on the fastening plate.

[0055] In one design variant, a resilient element is arranged between the fastening plate and the stationary section. This resilient element can be formed, for example, from a rubber element or from an element made of an elastic plastic. The resilient element occupies an intermediate position between the fastening plate and the stationary section and in this way, for example, enables the relative movability between the fastening plate and the stationary section.

[0056] In one design variant, at least one fastening element passes through the fastening opening. Here, the fastening element has a clearance in the fastening opening, viewed in a plane perpendicular to the longitudinal axis. This clearance makes it possible for the fastening plate to be laterally movable on the stationary section, so that in this way tolerances can be compensated for.

[0057] The fastening opening can be formed, for example, on the fastening plate. In this case, the fastening element passes through the fastening opening on the fastening plate and is screwed, for example, into the stationary section. In another design variant, the fastening opening can be formed on the stationary section. In this case, the fastening element passes through the fastening opening on the stationary section and is screwed, for example, into the fastening plate.

[0058] In one design variant, the transmission has a planetary transmission stage which constitutes a planetary transmission. The planetary transmission stage has a ring gear toothing and a facility of planet wheels which meshes with the ring gear toothing. The planet wheels are arranged on a planet carrier which can be rotated relative to the ring gear toothing, so that the planet wheels roll on the ring gear toothing when the planet carrier is rotated and thus cause the planet carrier itself to be rotated.

[0059] The driven element is connected to the planet carrier, the driven element being configured for transmitting a torque to the hinge element and thus causing the vehicle door to be adjusted relative to the vehicle body.

[0060] In one design variant, the ring gear toothing is arranged on a housing part. The housing part accordingly constitutes a ring gear, the ring gear toothing being formed on a side of the ring gear which points radially inwards, the planet wheels which are arranged on the planet carrier and can be rotated relative to the planet carrier meshing with the ring gear toothing.

[0061] In one design variant, the housing part has a first ring gear element which is configured with a first ring gear toothing and a second ring gear element which is configured with a second ring gear toothing. The housing part is thus composed of different ring gear elements which each have a ring gear toothing. By means of this housing part which has (at least) two ring gear elements, each with a ring gear toothing, a two-stage or more-stage planetary transmission can be provided, for example.

[0062] In one embodiment, the first ring gear element and the second ring gear element are arranged axially one after the other along the longitudinal axis. The first ring gear element and the second ring gear element can be fixed relative to one another, for example, in a form-locked, force-locked or force-locked manner with respect to a load about the longitudinal axis. Thus, the first ring gear element and the second ring gear element are fixed to one another in a torsionally rigid manner, it being conceivable for more than two ring gear elements to be provided and to be combined with one another.

[0063] For example, the first ring gear element and the second ring gear element are connected to one another and / or to a further housing part axially with respect to the longitudinal axis via at least one fastening element. For example, a fastening element in the form of a screw can be passed through the ring gear elements and screwed into a further housing part, for example a housing part of the input transmission stage, in order to connect the ring gear elements to one another and also to the further housing part in this way.

[0064] The ring gear elements can be designed, for example, as modular elements. Here, in one embodiment, the ring gear elements can be produced as identical parts. In another embodiment, the ring gear elements are designed differently, for example with different toothing, for example a different number of teeth or a different design, for example as straight toothing or helical toothing. Two or more ring gear elements can be combined with one another for the purpose of a modular configuration of the transmission.

[0065] In one embodiment, one of the first ring gear element and the second ring gear element is made of a metal material. Correspondingly, the other of the first ring gear element and the second ring gear element is made of a plastic material. Depending on how much force acts on the respective planetary stage, the ring gear elements can be made of a metal material or, in the case of less force, can be formed from a plastic material.

[0066] The ring gear elements made of metal and plastic can be designed as modular elements and, for example, are arranged one after the other and connected to one another. It is also conceivable and possible, however, for a ring gear element made of plastic to overmold a ring gear element made of metal, so that one (metal) ring gear element is overmolded as an insert by the material of the other (plastic) ring gear element.

[0067] In one embodiment, the planetary transmission stage has a rotation axis element which meshes with the arrangement of the planetary gears. The rotation axis element constitutes a sun gear with respect to the planetary gears of the planet carrier and is arranged, for example, centrically relative to the longitudinal axis of the driven element. The driven element meshes with the planetary gears supported on the planet carrier, so that the planetary gears can be driven via the rotation axis element, thereby rolling on the ring gear toothing, so that the planet carrier itself is rotated and, as a result, the planet carrier is moved in rotation with the driven element.

[0068] In one design variant, the planetary gear stage has a facility of further planetary wheels which are arranged in a rotatable manner on a further planet carrier and which mesh with the ring gear toothing. The rotational axis element is preferably connected in a rotationally fixed manner to the further planet carrier, wherein the rotational axis element can be formed integrally with the further planet carrier for this purpose, or the rotational axis element and the further planet carrier can be produced as separate components.

[0069] The planetary gear of the planetary gear stage accordingly consists of two stages of planetary gears. For this purpose, the planetary gear stage has two planet carriers on which a respectively assigned planetary wheel which meshes with the ring gear toothing is rotatably supported. The rotational axis element is connected to the planet carrier on the drive side and is in tooth engagement with the planetary wheels of the further planet carrier on the driven side, such that a rotation of the rotational axis element is brought about by a drive of the planet carrier on the drive side, as a result of which the planetary wheels on the further planet carrier on the driven side are moved and the planet carrier is moved in a rotational movement together with the driven element to which the planet carrier is connected in a rotationally fixed manner.

[0070] The planetary gear can in particular bring about a speed-reducing transmission conversion of the rotational speed, as a result of which the rotational speed of the electric motor is reduced to the driven element, but the torque is increased by the transmission conversion and is thus increased.

[0071] In one design variant, the transmission has an input transmission stage which is in operative connection with the planetary gear stage. The input transmission stage is located upstream of the planetary gear stage.

[0072] The door drive device thus has a multi-stage transmission. The input transmission stage is arranged on the input side on the electric motor side and is driven in operation via the electric motor. The planetary gear stage which is located downstream is in operative connection with the input transmission stage and is assigned to the driven element via which the torque can be output and introduced into the power flow for adjusting the vehicle door.

[0073] In one design variant, the input transmission stage has a drive wheel and a drive worm which can be driven by the electric motor and which meshes with the drive wheel. The drive worm which is constructed with worm toothing is arranged on the motor shaft of the electric motor and is rotated in operation by the electric motor. The rotational movement of the drive worm is converted here into a rotational movement of the drive wheel. The drive wheel is in operative connection with the planetary gear stage which is located downstream and is implemented by the planetary gear and thus drives the planetary gear stage which is implemented by the planetary gear. BRIEF DESCRIPTION OF DRAWINGS

[0074] The idea of the utility model will be explained in detail below with reference to the embodiments shown in the drawings.

[0075] In which:

[0076] Figure 1A schematic view of a door of a vehicle is shown, on which a door drive apparatus is arranged;

[0077] Figure 2 A view of an embodiment of a door drive apparatus is shown;

[0078] Figure 3 A view of a transmission of a door drive apparatus is shown;

[0079] Figure 4 Another view of the transmission is shown;

[0080] Figure 5 Yet another further view of the transmission is shown;

[0081] Figure 6 Yet another further view of the transmission is shown;

[0082] Figure 7 A view of the transmission is shown, in which the ring gear composed of the housing part of the planetary transmission stage is not shown;

[0083] Figure 8 A view of a structural assembly of the transmission is shown, which comprises a planet carrier of the planetary transmission stage on which the planet wheels are arranged and a driven element;

[0084] Figure 9 A separate view of the planet carrier on which the driven element is arranged is shown;

[0085] Figure 10A A schematic view of an embodiment of a door drive apparatus is shown, in which the housing part of the transmission is supported on a stationary section via a centering device;

[0086] Figure 10B A schematic view of a centering device according to Figure 10A is shown;

[0087] Figure 11 A schematic view of another embodiment of a centering device for supporting the housing part is shown;

[0088] Figure 12 A schematic view of yet another further embodiment of a centering device is shown;

[0089] Figure 13 A schematic view of a centering device is shown;

[0090] Figure 14 A view of a planet carrier is shown, which has a driven element arranged thereon, a spacer layer arranged on a form-locking section;

[0091] Figure 15Schematic view of a spacer layer in the form of an exploded view;

[0092] Figure 16 Schematic view of another embodiment of a spacer layer in the form of an exploded view;

[0093] Figure 17 View showing an embodiment for connecting a fastening plate to a stationary segment;

[0094] Figure 18 Schematic view of the arrangement according to Figure 17 in a tilted condition;

[0095] Figure 19 View showing another embodiment for fastening a fastening plate to a stationary segment;

[0096] Figure 20 View showing an embodiment of a housing part modularly composed of a plurality of ring gear elements;

[0097] Figure 21 View showing an embodiment of a ring gear element;

[0098] Figure 22 Schematic view of an embodiment of a housing part composed of a plurality of ring gear elements;

[0099] Figure 23 Schematic view of another embodiment of a housing part;

[0100] Figure 24 Schematic view of yet another further embodiment of a housing part;

[0101] Figure 25A View showing an embodiment of a housing part composed of a plurality of ring gear elements;

[0102] Figure 25B Sectioned view of the arrangement according to Figure 25A ;

[0103] Figure 26A Exploded view of the arrangement according to Figure 25A ;

[0104] Figure 26B Sectioned view of the arrangement according to Figure 26A ;

[0105] Figure 27 View showing an embodiment of a housing part composed of a plurality of ring gear elements;

[0106] Figure 28A View showing an embodiment of a housing part;

[0107] Figure 28B a rear view of a housing part according to Figure 28A ;

[0108] Figure 28C a longitudinal sectional view of a housing part;

[0109] Figure 29A a view of an embodiment of a housing part;

[0110] Figure 29B a sectional view of a housing part according to Figure 29A ;

[0111] Figure 30A a view of an embodiment of a housing part;

[0112] Figure 30B a sectional view of a housing part according to Figure 30A ;

[0113] Figure 31 a view of an embodiment of a housing part;

[0114] Figure 32 a schematic view of the way a housing part is connected with a further housing part of an input gear stage;

[0115] Figure 33 a schematic view of the way a fastening plate is fastened on a housing part via a positioning pin;

[0116] Figure 34 a schematic view of the state when a fastening plate is connected with a housing part;

[0117] Figure 35 a schematic view of a fastening plate and a housing part in a connected condition; and

[0118] Figure 36 a schematic view of an embodiment with a centering pin for centering a driven element relative to a hinge element. DETAILED DESCRIPTION

[0119] Figure 1 a schematic view of a vehicle 1 having a door 11 in the form of a vehicle side door which is pivotable relative to a vehicle body 10. The door 11 is coupled with the vehicle body 10 via a door hinge 110 and is pivotable about the door hinge 110 relative to the vehicle body 10.

[0120] The door drive 2 serves to adjust the vehicle door 11 electrically relative to the vehicle body 10 and for this purpose has an electric motor 20 and a transmission 21 for introducing a torque into the vehicle door 11. The door drive 2 can act, for example, on one of the door hinges 110 and introduce a torque into the hinge shaft of the door hinge 110, thereby adjusting the vehicle door 11 in an electrically driven manner between a closed and an open condition.

[0121] In the embodiment of the door drive 2 shown in Figure 2 The electric motor 20 is coupled to the transmission 21, which has an input transmission stage 22 and a planetary transmission stage 23. A driven element 24 is driven via the transmission 21, which is in operative connection, for example, with the hinge shaft of the door hinge 110 of the vehicle door 11, or drives a kinematic transmission, for example a four-bar linkage or the like, in order to move the vehicle door 11 in this way relative to the vehicle body 10.

[0122] The door drive 2 can be arranged, for example, point- wise on the vehicle door 11 and in this case be adjusted together with the vehicle door 11. For this purpose, the door drive 2 can be arranged, for example, in the door inner space of the vehicle door 11, for example in the wet space of the vehicle door 11.

[0123] In the embodiment shown, the input transmission stage 22 of the transmission 21 has a housing part 220, to which the electric motor 20 and the control device 27 are firmly connected. As can be seen from different views of the transmission 21 according to Figures 3 to 7 In the opening 225 of the housing part 220, a drive wheel 222 arranged on a rotary shaft element 223 is accommodated, which engages with a drive worm 221 arranged on the motor shaft 200 of the electric motor 20, so that the drive wheel 222 can be moved in rotation within the housing part 220 under the drive of the drive worm 221.

[0124] The motor shaft 200, on which the drive worm 221 is arranged, can be rotated relative to the housing part 220 about a first longitudinal axis LI. The drive wheel 222 is connected to the rotary shaft element 223 against relative rotation and can be rotated relative to the housing part 220 about a second longitudinal axis L2 perpendicular to the first longitudinal axis LI. The rotation axes LI, L2 of the drive worm 221 on the one hand and the drive wheel 222 on the other hand are therefore perpendicular to one another.

[0125] The planetary transmission stage 23 is formed by a planetary transmission and has a housing part 230, which has a substantially cylindrical basic shape and is shaped with a ring gear toothing 236 in an inner cavity, as can be seen, for example, from Figure 5This can be seen. The planetary transmission has two planetary wheel stages with two sets of planetary wheels 232, 234, which are rotatably supported on the associated planet carrier 231, 235, respectively, and engage with the ring gear toothing 236.

[0126] The first planetary wheels 232 on the first planet carrier 231 are in tooth engagement here with the toothing 224 at the end of the rotational shaft element 223, so that the rotational shaft element 223 drives the planetary wheels 232 and, in operation, imparts a rotational movement to the planetary wheels, which causes the planetary wheels 232 to revolve on the ring gear toothing 236 and, as a result, the planet carrier 231 to rotate within the housing part 230.

[0127] The planet carrier 231 of the first planetary wheel stage is connected in a rotationally fixed manner to the rotational shaft element 233, which has toothing in tooth engagement with the planetary wheels 234 on the planet carrier 235 of the second planetary wheel stage. If the first planet carrier 231 is thus set in rotational movement by the input transmission stage 22, the rotational movement is transmitted via the rotational shaft element 233 to the planetary wheels 234 of the second planetary wheel stage, so that the planetary wheels 234 are caused to revolve on the ring gear toothing 236 and, as a result, the planet carrier 235 to rotate within the housing part 230.

[0128] The planet carrier 235 is connected in a rotationally fixed manner to the driven element 24, so that a rotational movement of the planet carrier 235 will cause the driven element 24 to rotate about the longitudinal axis L2.

[0129] In the transmission 21, the housing parts 220, 230 are secured to one another in a torsionally fixed manner, so that the ring gear toothing 236 of the housing part 230 is held in position in operation relative to the housing part 220 and, as a result, relative to the electric motor. In order to connect the housing parts 220, 230 to one another, there is provided an intermediate element 25, which is arranged between the housing parts 220, 230 and centers the housing parts 220, 230 relative to one another and also secures them to one another in a torsionally fixed manner.

[0130] The intermediate element 25 is constructed with a bearing seat therein, in which a bearing 26 is accommodated. The bearing 26 serves to support the rotational shaft element 223 of the input transmission stage 22. Since the bearing 26 is arranged on the intermediate element 25 and is thus centered by the intermediate element 25, and since the housing parts 220, 230 are also aligned relative to one another and thus centered via the intermediate element 25, it is ensured that the rotational shaft element 223 and, in turn, the drive wheel 222 are supported radially in a prescribed centered manner within the housing part 220. Furthermore, the ring gear toothing 236 and, in turn, the planetary wheels of the planetary transmission stage 23 are centered relative to the rotational shaft element 223, so that a low-friction and low-noise operation is achieved.

[0131] The bearing 26 is fixed via a fixing element 260, which is for example inserted into the intermediate element 25 with a latching section and thus axially secures the bearing 26 in a bearing seat of the intermediate element 25.

[0132] The housing parts 220, 230 are secured to one another in a torsionally rigid manner via the intermediate element 25 in the assembled state. By providing the intermediate element 25, a connection between the housing parts 220, 230 is obtained which can be established simply and inexpensively. Via the intermediate element 25, the functions of centering and torsionally rigid connection can be provided. Furthermore, the intermediate element 25 serves to support the transmission elements, in particular the input transmission stage 22.

[0133] In the embodiment shown, the (output-side) planet carrier 235 of the planetary transmission stage 23 is connected in a rotationally fixed manner to the driven element 24 and provides the planetary transmission stage 23 and thus the transmission 21 with a driven end.

[0134] Figure 8 and Figure 9 In one embodiment, the planet carrier 235 and the driven element 24 shown are for example manufactured as separate components and are connected to one another in a rotationally fixed manner in the state in which the door drive 1 is ready for operation, wherein the driven element 24 is accommodated in the associated accommodation opening 238 of the planet carrier 235.

[0135] In the embodiment shown, the driven element 24 is designed as a shaft element which can rotate together with the planet carrier 235 about the longitudinal axis L2 in operation. The driven element 24 is configured with a form-locking section 240 via which the driven element 24 is brought into operative connection with the structural assembly of the upper stage for outputting torque.

[0136] On the end facing away from the form-locking section 240, the driven element 24 is inserted into the accommodation opening 238 of the planet carrier 235, thereby securing the driven element 24 and the planet carrier 235 to one another in a rotationally fixed manner. On the end associated with the planet carrier 235, the driven element 24 is delimited via a radially outwardly protruding flange section 241. In the assembled state, the flange section 241 is accommodated in the accommodation opening 238 in such a way that the flange section 241 is flush with the surface of the planet carrier 235.

[0137] The driven element 24 is arranged concentrically with the planet carrier 235 by being inserted into the accommodation opening 238. As can be seen from Figure 8It can be seen that the driven element 24 is arranged with a positioning pin 244 which is in centring engagement with the rotational shaft element 233 of the planetary gear stage of the input side of the planet carrier 231, such that the rotational shaft element 233 which is in toothed engagement with the planet wheels 234 of the planetary gear stage of the output side of the planet carrier 235 is centred with respect to the planet carrier 235, but can rotate with respect to the planet carrier 235 and thus with respect to the driven element 24.

[0138] On the planet carrier 235, openings 237 are formed in succession along a circular line around the longitudinal axis L2, in which openings bearing rotational shafts are accommodated, on which the planet wheels 234 are rotatably supported.

[0139] In the embodiment shown, the door drive device 2 is designed to be fastened on the vehicle door 11 in order to induce a rotational torque on the hinge 110 and to adjust the vehicle door 11 with respect to the vehicle body 10, as is schematically depicted in Figure 1 The latter is schematically depicted in Fig. 1. Now referring to the schematic views according to Figure 10A In order to fasten the door drive device 2 on the vehicle door 11, in one embodiment the housing part 230 is connected with a fastening plate 28 which is connected with the stationary section 3. The stationary section 3 is point- and position- fixedly arranged on the vehicle door 11 and carries the door drive device 2 on the vehicle door 11 in the condition in accordance with the operation.

[0140] On the stationary section 3, a hinge element 4 is swingably supported which is connected with the vehicle body 10. The driven element 24 of the door drive device 2 is in connection with the hinge element 4, such that by rotation of the driven element 24 about the longitudinal axis L2 a rotational torque can be induced on the hinge element 4 and thus the vehicle door 11 can be moved with respect to the vehicle body 10.

[0141] In the embodiment shown, the driven element 24 is inserted with a form- locking section 240 into the associated form- locking opening 40 of the hinge element 4. The form- locking opening 40 is complementarily formed with the form- locking section 240 of the driven element 24, for example by a toothing, such that the driven element 24 is connected with the hinge element 4 in a torsion-proof manner.

[0142] On the housing part 230, a housing section 239 is formed which is journalled from the housing part 230 along the longitudinal axis L2 and is concentric with the longitudinal axis L2 at this point, for example in connection with Figure 2 This can be seen from Figure 10A In the embodiment shown, the housing section 239 passes through the fastening plate 28 and is supported on a centring device 30 which is arranged on the stationary section 3, such that the housing part 230 is centred with respect to the stationary section 3 about the longitudinal axis L2 via the centring device 30.

[0143] In the embodiment shown, the fastening plate 28 is in abutment with the fastening section 32 of the stationary section 3 and is, for example, screwed to the stationary section 3. As a result of the housing portion 230 additionally being inserted into the centering device 30 via the shaft-like housing section 239, the housing portion 230 is supported and centered with respect to the stationary section 3 in a plane perpendicular to the longitudinal axis L2.

[0144] By the centering (with small fitting tolerances), the transverse forces between the driven element 24 and the hinge element 4 are reduced, preferably avoided. The centering device 30, when assembled, brings about that, by the insertion of the housing section 239 into the centering device 30, the housing portion 230 is brought into a centered position with respect to the stationary section 3 and, as a result, the driven element 24 is inserted into the hinge element 4 supported on the stationary section 3 in a centered position. As a result, the driven element 24 is centered with respect to the hinge element 4. This centered position is then fixed by fastening the housing portion 230 to the stationary section 3 via the fastening plate 28, so that, in operation, the driven element 24 is centered with respect to the hinge element 4 and, in particular, the form-locked section 240 is not excessively pressed inside the form-locked opening 40 of the hinge element 4 supported on the stationary section 3 in a pivotable manner about the longitudinal axis L2.

[0145] The centering device 30 preferably extends along a circular line around the longitudinal axis L2. Figure 10B In the embodiment shown in Figure 13 In one embodiment shown in

[0146] In another design, the centering device 30 can also be closed in an annular manner around the longitudinal axis L2.

[0147] In the embodiment shown in Figure 11 In the embodiment shown in

[0148] In the embodiment shown in Figure 12 In the embodiment shown in Figure 10A , Figure 10BThe embodiment explained in Fig. 6 is implemented analogously, wherein the fastening plate 28 is attached to the stationary section 3 by means of the fastening section 280. Again, the housing part 230 is centered with respect to the stationary section 3 by means of the journalling of the housing section 239 in the centering device 30.

[0149] Figure 13 An embodiment of the centering device 30 is shown, which has four centering elements 300 arranged in succession along a circular line around the opening 31, which are designed arcuately and project from the stationary section 3.

[0150] By means of the centering device 30, which centers the position of the housing part 230 in a plane perpendicular to the longitudinal axis L2 with respect to the stationary section 3 and in turn the hinge element 4, the driven element 24 is in particular centered with respect to the hinge element 4, so that the form-locked section 240 is centered in the form-locked opening 40. Thus, the influence of tolerances is minimized. The gap present between the form-locked section 240 and the hinge element 4 in the form-locked opening 40 will become uniform around the periphery of the form-locked section 240. In this way, at least the risk of local over-pressing and the resulting wear can be reduced.

[0151] In addition to the centering via the centering device 30, as shown in the embodiment in Fig. 7, a spacer layer 242 can also be arranged on the form-locked section 240, which serves to adjust a uniform peripheral spacing between the form-locked section 240 and the hinge element 4 in the form-locked opening 40. The spacer layer 242 can be made of a plastic material, for example, wherein, as shown in the embodiment in Fig. 7, the form-locked section 240 is arranged on the spacer layer 242. Figure 14 Figure 15 and the two embodiments in Figs. 8 and 9, openings 245 can be formed in the spacer layer 242, which interrupt a surface section 243 of the spacer layer 242. Figure 16

[0152] The spacer layer 242 is made of a plastic material, for example, such as polypropylene (PP), which is much softer than the material of the driven element 24, which is made of steel, for example. If a local over-pressing force occurs, the material of the spacer layer 242 is elastically deformed and pushed aside, wherein the material can flow into the region of the openings 245, for example.

[0153] ​​The spacer layer 242 is used to adjust the centering position between the driven element 24 and the hinge element 4, especially during assembly. During assembly, a uniform spacing equivalent to the thickness of the spacer layer 242 is adjusted between the inner wall of the form-locking section 240 and the form-locking opening 242. Therefore, the spacer layer 242 plays a particularly important role in centering during assembly. This centering is then secured by fastening the housing portion 230 to the stationary section 3. If, during operation, local surface pressure increases due to non-circular movement of the driven element 24, the spacer layer 242 can be pushed aside due to its flexibility.

[0154] Alternatively or additionally, the fastening plate 28 can be connected to the stationary section 3 in a manner that allows for some degree of movement, in order to provide tolerance compensation. Figure 17 and Figure 18 The embodiments illustrate this. Therefore, the fastening plate 28 can be screwed to the stationary section 3 via a fastening element 281, wherein, for this purpose, the fastening element 281 passes through a fastening opening 283 on the fastening plate 28 and is screwed into the stationary section 3. Here, the fastening element 281 is inserted into the fastening opening 283 with a gap, and is further axially supported on the fastening plate 28 via a spring element 282, thereby providing elasticity in the connection between the fastening plate 28 and the stationary section 3.

[0155] This enables the housing portion 230 to move relative to the stationary section 3, thus allowing for tolerance compensation and reducing surface pressure on the driven element 24. This is because the housing portion 230 can move, for example, by tilting (e.g., Figure 18 (As shown) It is offset relative to the stationary section 3 and further relative to the hinge element 4 supported on the stationary section 3.

[0156] exist Figure 19 In another embodiment shown, the fastening element 281 is inserted into the associated fastening opening 283 with a gap in a plane perpendicular to the longitudinal axis L2, wherein an elastic element 284, such as a rubber element or an element made of an elastomeric plastic material, is additionally arranged between the stationary section 3 and the fastening plate 28, and thus allows the fastening plate 28 and the housing portion 230 arranged on the fastening plate to perform axial and lateral compensating movements relative to the stationary section 3.

[0157] Such as combination Figures 2 to 7 Explained, the housing portion 230 is constructed with a gear ring toothed portion 236, and the planetary gears 232 and 234 on the planet carriers 231 and 235 of the planetary transmission mesh with the gear ring toothed portion. Figure 20In the embodiment shown in Fig. 2, the housing part 230 is embodied by ring gear elements 230A, 230B which are modularly connected to each other, the ring gear elements being respectively configured with ring gear teeth 236A, 236B and thus being respectively assigned to a planetary stage of the planetary wheels 232 on the planet carrier 231 or to a planetary stage of the planetary wheels 234 on the planet carrier 235.

[0158] Figure 21 An embodiment of a ring gear element 230A is shown, which is connected with a further ring gear element 230B for constituting the housing part 230.

[0159] In the embodiment according to Figure 20 , Figure 21 the ring gear elements 230A, 230B can respectively be made of metal. However, it is also conceivable and possible that one of the ring gear elements 230A, 230B is shaped from a metal material and the other ring gear element 230A, 230B is shaped from a plastic material.

[0160] In the embodiment shown schematically in Figure 22 , the ring gear element 230A with the ring gear teeth 236A is made of metal and is connected with a further ring gear element 230B with the ring gear teeth 236B made of plastic. Between the ring gear elements 230A, 230B a thrust disc 230C is arranged for axially supporting the planetary stages. An end element 230D complements the housing part 230 and supports the driven element 24.

[0161] In the embodiment shown schematically in Figure 23 , the housing part 230 with the ring gear teeth 236A, 236B is shaped from plastic, wherein an end element 230D complements the housing part 230. Again, between the ring gear teeth 236A, 236B a thrust disc 230C is arranged for axially supporting the planetary stages and connecting with the housing part 230.

[0162] In the embodiment shown schematically in Figure 24 , the housing part 230 is shaped from a ring gear element 230A made of plastic. The ring gear element 230A is configured with ring gear teeth 236A. A ring gear element 230B is injection-molded on the outside with the material of the ring gear element 230A as an insert and is configured with ring gear teeth 236B.

[0163] In the embodiment shown schematically in Figure 25A , 25BIn the embodiments shown in 26A and 26B, the housing portion 230 is modularly assembled from gear ring elements 230A and 230B, which are constructed as identical parts and arranged sequentially along the longitudinal axis L2. Gear ring elements 230A and 230B are respectively constructed with gear ring teeth 236A and 236B, and each has a coupling section 230F, on which external teeth are formed. If gear ring elements 230A and 230B are arranged sequentially along the axial direction, the coupling section 230F of one gear ring element 230A is embedded in the gear ring tooth 236B of the other gear ring element 230B, thereby establishing a torsional connection between the gear ring elements 230A and 230B.

[0164] The housing portion 230 is supplemented by the end element 230D, which forms the housing cover and supports the driven element 240. The end element 230D has an internal toothed portion that can be engaged with the external toothed portion of the coupling section 230F of the gear ring element 230B, thereby coupling the end element 230D to the gear ring element 230B.

[0165] A thrust plate 230C for axial support of the planetary star is also provided via the coupling section 230F.

[0166] According to Figure 25A , Figure 25B , Figure 26A , Figure 26B In the design scheme, the housing part 230 can be scaled up in any way to provide a planetary transmission device with one planetary level or more than two planetary levels.

[0167] like Figure 27 As shown, the end element 230D can be used instead. Figure 25A , Figure 25B , Figure 26A , Figure 26B The end element 230D integrates a fastening section 230E for fastening, for example, to a stationary section 3.

[0168] Gear ring elements 230A and 230B can be constructed as identical components. However, gear ring elements 230A and 230B can also differ, for example, in the design of their respective gear ring teeth 236A and 236B, such as in the number of teeth or the tooth profile of their respective gear ring teeth 236A and 236B.

[0169] exist Figures 28A to 28CIn the embodiment of the housing part 230 shown in Fig. 2, the housing part can consist of one or more ring gear elements, the ring gear toothing 236A consisting of helical toothing, while the further ring gear toothing 236B consists of straight toothing. Between the ring gear toothing 236A, 236B, a thrust disc 230C is arranged for axial support of the planetary stage.

[0170] In the embodiment shown in Fig. 2, the housing part 230 is formed by two ring gear elements 230A, 230B, one of which 230A is formed from plastic, while the other 230B is made of metal and is injection-moulded on the outside by the material of the ring gear element 230A. Figure 29A Figure 29B In the embodiment shown in Fig. 2, the housing part 230 is formed by two ring gear elements 230A, 230B, one of which 230A is formed from plastic, while the other 230B is made of metal and is injection-moulded on the outside by the material of the ring gear element 230A.

[0171] As shown in the embodiment in Fig. 2, the ring gear element 230B can also be configured here with an end element 230D for supporting the driven element 24 and also with a housing section 239 for centring relative to the stationary section 3. Figure 30A Figure 30B In the embodiment shown in Fig. 2, the housing part 230 is formed by two ring gear elements 230A, 230B, one of which 230A is formed from plastic, while the other 230B is made of metal and is injection-moulded on the outside by the material of the ring gear element 230A.

[0172] In the embodiment shown in Fig. 2, the housing part 230 is formed by two ring gear elements 230A, 230B, one of which 230A is formed from plastic, while the other 230B is made of metal and is injection-moulded on the outside by the material of the ring gear element 230A. Figure 31 As shown in Fig. 2, the housing part 230 can be connected to the housing part 220 of the input transmission stage 22 by means of fastening elements 227 in the form of screws in such a way that the fastening elements 227 pass axially through the housing part 230 and are screwed to the housing section 226 of the housing part 220. If the housing part 230 consists of a plurality of ring gear elements 230A, 230B and, for example, an additional end element 230D, the ring gear elements 230A, 230B and the end element 230D are jointly screwed to the housing part 220 via the fastening elements 227 and are thus pressed axially against one another.

[0173] Figure 32 As shown in Fig. 2, the housing part 230 can be connected to the housing part 220 of the input transmission stage 22 by means of fastening elements 227 in the form of screws in such a way that the fastening elements 227 pass axially through the housing part 230 and are screwed to the housing section 226 of the housing part 220. If the housing part 230 consists of a plurality of ring gear elements 230A, 230B and, for example, an additional end element 230D, the ring gear elements 230A, 230B and the end element 230D are jointly screwed to the housing part 220 via the fastening elements 227 and are thus pressed axially against one another.

[0174] As shown in Fig. 2, the housing part 230 can be connected to the housing part 220 of the input transmission stage 22 by means of fastening elements 227 in the form of screws in such a way that the fastening elements 227 pass axially through the housing part 230 and are screwed to the housing section 226 of the housing part 220. If the housing part 230 consists of a plurality of ring gear elements 230A, 230B and, for example, an additional end element 230D, the ring gear elements 230A, 230B and the end element 230D are jointly screwed to the housing part 220 via the fastening elements 227 and are thus pressed axially against one another. Figure 32 As shown in Fig. 2, the housing part 230 can be connected to the housing part 220 of the input transmission stage 22 by means of fastening elements 227 in the form of screws in such a way that the fastening elements 227 pass axially through the housing part 230 and are screwed to the housing section 226 of the housing part 220. If the housing part 230 consists of a plurality of ring gear elements 230A, 230B and, for example, an additional end element 230D, the ring gear elements 230A, 230B and the end element 230D are jointly screwed to the housing part 220 via the fastening elements 227 and are thus pressed axially against one another.

[0175] Figures 33 to 35 As shown in Fig. 2, the housing part 230 can be connected to the housing part 220 of the input transmission stage 22 by means of fastening elements 227 in the form of screws in such a way that the fastening elements 227 pass axially through the housing part 230 and are screwed to the housing section 226 of the housing part 220. If the housing part 230 consists of a plurality of ring gear elements 230A, 230B and, for example, an additional end element 230D, the ring gear elements 230A, 230B and the end element 230D are jointly screwed to the housing part 220 via the fastening elements 227 and are thus pressed axially against one another.

[0176] ​​​​The positioning pins 285 are fitted into the openings 286, 289 in a press fit. The openings 286, 289 are shaped here as through openings on the fastening plate 28 or on the housing part 230, which has the advantage that the entire material thickness of the wall of the fastening plate 28 and of the housing part 230 can be used for the press fit and thus the fastening plate 28 is positioned on the housing part 230 in a reliable and loadable manner via the positioning pins 285.

[0177] Since the openings 286, 289 extend through the wall of the fastening plate 28 and of the housing 230 and despite the press fit of the positioning pins 285 with the openings 286, 289 a moisture-tight closure is not ensured, a sealing element 287 is fitted between the fastening plate 28 and the housing 230 for each positioning pin 285, which is pressed between the fastening plate 28 and the housing part 230 in a cutout-shaped recess 288 on the housing 230 and is thus plastically deformed. The sealing element 287, which is for example in the form of a thermoplastic O-ring, extends around the respectively assigned positioning pin 285 and is fitted between the fastening plate 28 and the housing 230 in such a way that the transition between the fastening plate 28, the housing part 230 and the respective positioning pin 285 is sealed in a moisture-tight manner.

[0178] The positioning pins 285 can in particular be flush with the inner wall of the housing part 230 and thus do not limit the available installation space within the housing part 230, for example for the operation of the planet carrier 235.

[0179] Furthermore, the positioning pins 285 can also be flush with the outer side of the fastening plate 28 for abutment on the stationary section 3.

[0180] In the embodiment shown schematically in Figure 36 , the housing part 230 is fastened on the fastening section 32 via the fastening plate 28 and on the stationary section 3 via the fastening section, similar to the explanations above in connection with Figure 10A and Figure 10B . The stationary section 3 is arranged stationary on the vehicle door 11. The door drive device 2 is fastened on this stationary section 3 in the scope of the assembly and thus on the vehicle door 11.

[0181] In the embodiment shown, the hinge element 4 is supported in a pivotable manner on the stationary section 3 via a bearing element 41 in the form of a support pin. The hinge element 4 is assigned to the vehicle body 10, such that the vehicle door 11 can be pivoted relative to the vehicle body 10 by a pivoting of the hinge element 4 relative to the stationary section 3.

[0182] In the embodiment shown, the housing part 230 is for example fastened via a centering device 30, similar to the explanations above in connection with Figure 10A and 10BAs described, centring relative to the stationary section 3. In addition or alternatively, a centring pin 246 is also arranged on the driven element 24, which is embedded in a form-locked opening 40 formed on the bearing element 41, which is embedded in a centring opening 410 of the bearing element 41, so that in addition to or alternatively to the centring device 30, centring of the drive element 24 relative to the hinge element 4 is effected by means of the centring pin 246.

[0183] The centring pin 246 is preferably formed from a soft material, for example a plastic material, or a soft, for example thin, preferably elastic metal material, for example spring steel. The centring pin 246 is intended to function in particular during assembly, so that during assembly, the driven element 24 is centred relative to the hinge element 4 via the centring pin 246 before the fastening plate 28 is finally secured on the fastening section 32 of the stationary section 3, i.e. centred relative to the bearing element 41 when the driven element 24 is inserted into the form-locked opening 40.

[0184] In this way, the driven element 24 is brought into centred engagement with the form-locked opening 40. Then, in the context of assembly, the fastening plate 28 is secured on the stationary section 3 by screwing, so that the centred position of the driven element 24 in the form-locked opening 40 of the hinge element 4 is fixed.

[0185] Since the centring pin 246 only has a centring function during assembly and should not function in operation, in particular should not provide support, in order to avoid over-dimensioning of the support of the driven element 24, the centring pin 246 can in principle be removed after assembly. To this end, the centring opening 410 on the bearing element 41 can be designed, for example, as an outwardly open through-opening, so that after the end of assembly, i.e. after the fastening plate 28 is secured on the stationary section 3, the centring pin 246 can be pulled out of the centring opening 410. To this end, the centring pin 246 can be embodied as a so-called plug gauge.

[0186] The inventive concept is not limited to the above-described embodiments.

[0187] The door drive device of the type described can be used to adjust a side door on a vehicle, but can also be used, for example, to adjust a tailgate in a vehicle.

[0188] The door drive device serves to introduce a torque for adjusting the door, wherein the door drive device can act directly on the door hinge, or a kinematic transmission can also be arranged on the driven side of the door drive device, for example in the form of a four-bar linkage or another lever transmission.

[0189] List of reference signs

[0190] 1 vehicle

[0191] 10 vehicle body

[0192] 11 door

[0193] 110 door hinge

[0194] 2 door drive device

[0195] 20 motor

[0196] 200 motor shaft

[0197] 21 transmission

[0198] 22 input transmission stage

[0199] 220 housing part

[0200] 221 drive element (drive worm)

[0201] 222 drive wheel

[0202] 223 pivot element

[0203] 224 toothing

[0204] 225 opening

[0205] 226 housing part

[0206] 227 fastening element

[0207] 23 planetary transmission stage

[0208] 230 housing part

[0209] 230A, 230B ring gear element

[0210] 230C thrust disc

[0211] 230D end element

[0212] 230E fastening section

[0213] 230F coupling section

[0214] 231 planet carrier

[0215] 232 planet wheel

[0216] 233 pivot element

[0217] 234 planet wheel

[0218] 235 planet carrier

[0219] 236 ring gear toothing

[0220] 236A, 236B ring gear toothing

[0221] 237 opening

[0222] 238 receiving opening

[0223] 239 housing section (journal section)

[0224] 24 driven element

[0225] 240 form-fitting section

[0226] 241 flange

[0227] 242 spacer layer

[0228] 243 surface section

[0229] 244 positioning pin

[0230] 245 opening

[0231] 246 centering pin

[0232] 25 intermediate element

[0233] 26 bearing

[0234] 27 control device

[0235] 28 fastening plate

[0236] 280 support section

[0237] 281 fastening element

[0238] 282 elastic element (spring element)

[0239] 283 fastening opening

[0240] 284 elastic element

[0241] 285 positioning pin

[0242] 286 opening

[0243] 287 sealing element

[0244] 288 recess

[0245] 289 opening

[0246] 3 stationary section

[0247] 30 centering device

[0248] 300 centering element

[0249] 31 opening

[0250] 32 fastening section

[0251] 4 hinge element

[0252] 40 form-locking opening

[0253] 41 bearing element

[0254] 410 centering opening

[0255] L1, L2 longitudinal axis

Claims

1. Door drive device (2) for electrically adjusting a vehicle door (11), having: an electric motor (20), a transmission (21) which is drivable by the electric motor (20), the transmission having a first housing part (230), a driven element (24) which is in operative connection with the transmission (21) and which is rotatable about a longitudinal axis (L2) relative to the first housing part (230), the driven element being designed to output a torque for adjusting the vehicle door (11), a stationary section (3) to which the first housing part (230) is firmly connected, and the driven element (24) being placed in torque-proof connection with the hinge element (4) for outputting a torque, characterized in that a centering device (30) is arranged on the stationary section (3) or on the hinge element (4), the centering device being designed to center the first housing part (230) relative to the stationary section (3) and / or relative to the hinge element (4) about the longitudinal axis (L2). The centering device (30) extends along a circular line about the longitudinal axis (L2). The centering device (30) extends annularly along a circular line about the longitudinal axis (L2). The centering device (30) has a plurality of centering elements (300) which are arranged one after the other along a circular line about the longitudinal axis (L2). The first housing part (230) has a housing section (239) which is concentric with the longitudinal axis (L2), which housing section is embedded in the centering device (30) in the assembled state and is supported on the centering device (30) along a plane which is perpendicular to the longitudinal axis (L2). - a hinge element (4) that can oscillate with respect to the stationary section (3), wherein The driven element (24) has a form-locking section (240) and the hinge element (4) has a form-locking opening (40), wherein the form-locking section (240) can be placed in form-locking engagement with the hinge element (4) for transmitting a torque. The form-locking section (240) is at least section-wise covered with a spacer layer (242) which is made of a material which is softer than the material of the form-locking section (240).

2. The door drive apparatus (2) according to claim 1, characterized in that The spacer layer (242) is formed from a plastic material.

3. The door drive apparatus (2) according to claim 2, characterized in that The spacer layer (242) extends on the form-locking section (240) perimetrically about the longitudinal axis (L2).

4. The door drive apparatus (2) according to claim 2, characterized in that The spacer layer (242) has a provision of openings (245).

5. The door drive apparatus (2) according to claim 1, characterized in that There is a centering pin (246) which is designed to center the driven element (24) and the hinge element (4) relative to one another about the longitudinal axis (L2).

6. The door drive apparatus (2) according to claim 1, characterized in that The centering pin (246) is arranged concentrically with the longitudinal axis (L2).

7. The door drive apparatus (2) according to claim 6, characterized in that The centering pin (246) is formed from an elastic material.

8. The door drive apparatus (2) according to claim 7, characterized in that The centering pin (246) is embedded in a centering opening (410) on the hinge element (4).

9. The door drive apparatus (2) according to claim 7, characterized in that ​ 10. The door drive apparatus (2) according to claim 7, characterized in that ​ 11. The door drive apparatus (2) according to claim 1, characterized in that ​ 12. The door drive apparatus (2) according to claim 11, characterized in that ​ 13. The door drive apparatus (2) according to claim 11, characterized in that ​ 14. The door drive apparatus (2) according to claim 11, characterized in that ​ 15. The door drive apparatus (2) according to claim 14, characterized in that After the driven element (24) is assembled on the hinge element (4), the centering pin (246) can be removed from the centering opening (410).

16. The door drive apparatus (2) according to claim 1, characterized in that a fastening plate (28) which is firmly connected with the first housing part (230) and which can be connected with the stationary section (3) via the fastening plate.

17. The door drive apparatus (2) according to claim 16, characterized in that at least one positioning pin (285) which is embedded in an opening (286) of the fastening plate (28) and in an opening (289) of the first housing part (230) and which positions the fastening plate (28) relative to the first housing part (230) with respect to a plane which is perpendicular to the longitudinal axis (L2).

18. The door drive apparatus (2) according to claim 17, characterized in that The at least one positioning pin (285) is embedded in the opening (286) of the fastening plate (28) and in the opening (289) of the first housing part (230) in a press fit.

19. The door drive apparatus (2) according to claim 17, characterized in that The opening (286) of the fastening plate (28) and / or the opening (289) of the first housing part (230) is shaped by a through-opening.

20. The door drive apparatus (2) according to claim 17, characterized in that at least one sealing element (287) which is arranged between the first housing part (230) and the fastening plate (28) and which seals a transition between the at least one positioning pin (285), the fastening plate (28) and the first housing part (230).

21. The door drive apparatus (2) according to claim 20, characterized in that The at least one sealing element (287) extends perimetrically around the at least one positioning pin (285).

22. The door drive apparatus (2) according to claim 16, characterized in that In the assembled condition, the fastening plate (28) is connected with the stationary section (3) via at least one first fastening element (281).

23. The door drive apparatus (2) according to claim 22, characterized in that The fastening plate (28) is connected with the stationary section (3) via the at least one first fastening element (281) such that the fastening plate (28) can be tilted relative to the stationary section (3).

24. The door drive apparatus (2) according to claim 22, characterized in that The at least one first fastening element (281) acts axially between the fastening plate (28) and the stationary section (3) in an axial direction which is parallel to the longitudinal axis (L2).

25. The door drive apparatus (2) according to claim 24, characterized in that The at least one first fastening element (281) is supported on the fastening plate (28) or on the stationary section (3) via a spring element (282).

26. The door drive apparatus (2) according to claim 22, characterized in that An elastic element (284) is arranged between the fastening plate (28) and the stationary section (3).

27. The door drive apparatus (2) according to claim 22, characterized in that The at least one first fastening element (281) passes through a fastening opening (283), wherein the first fastening element (281) has a clearance in the fastening opening (283) as seen in a plane which is perpendicular to the longitudinal axis (L2).

28. The door drive apparatus (2) according to claim 27, characterized in that The fastening opening (283) is shaped in the fastening plate (28) or in the stationary section (3).

29. The door drive apparatus (2) according to claim 1, characterized in that The transmission (21) has a planetary transmission stage (23) which constitutes a planetary transmission, having a ring gear toothing (236), a first planetary wheel (234) which meshes with the ring gear toothing (236), and a first planet carrier (235) which supports the first planetary wheel (234) and is rotatable relative to the ring gear toothing (236).

30. The door drive apparatus (2) according to claim 29, characterized in that The ring gear toothing (236) is arranged on the first housing part (230).

31. The door drive apparatus (2) according to claim 30, characterized in that The first housing part (230) has a first ring gear element (230A) which is configured with a first ring gear toothing (236A) and a second ring gear element (230B) which is configured with a second ring gear toothing (236B).

32. The door drive apparatus (2) according to claim 31, characterized in that The first ring gear element (230A) and the second ring gear element (230B) are arranged axially along the longitudinal axis (L2) in succession.

33. The door drive apparatus (2) according to claim 31, characterized in that The first ring gear element (230A) and the second ring gear element (230B) are fixed relative to one another in a form-locking, force form-locking or force-locking manner with respect to a load about the longitudinal axis (L2).

34. The door drive apparatus (2) according to claim 31, characterized in that The first ring gear element (230A) and the second ring gear element (230B) are connected to one another and / or to a further housing part (220) axially with respect to the longitudinal axis (L2) via at least one second fastening element (227).

35. The door drive apparatus (2) according to claim 31, characterized in that One of the first ring gear element (230A) and the second ring gear element (230B) is made of a metallic material, while the other of the first ring gear element (230A) and the second ring gear element (230B) is made of a plastic material.

36. The door drive apparatus (2) according to claim 35, characterized in that One of the first ring gear element (230A) and the second ring gear element (230B) is at least partially injection-molded by the plastic material of the other of the first ring gear element (230A) and the second ring gear element (230B).

37. The door drive apparatus (2) according to claim 29, characterized in that The planetary transmission stage (23) has a sun element (233) which meshes with the facilities of the first planetary wheel (234).

38. The door drive apparatus (2) according to claim 37, characterized in that The planetary transmission stage (23) has facilities of a further planetary wheel (232) which are arranged in a rotatable manner on a further planet carrier (231) and which mesh with the ring gear toothing (236).

39. The door drive apparatus (2) according to claim 38, characterized in that The sun element (233) is connected in a rotationally fixed manner to the further planet carrier (231).

40. The door drive apparatus (2) according to claim 29, characterized in that The transmission (21) has an input transmission stage (22) which is connected in an acting manner to the planetary transmission stage (23).

41. The door drive apparatus (2) according to claim 40, characterized in that The input transmission stage (22) has a drive wheel (222) and a drive worm (221) which can be driven by the electric motor (20) and which meshes with the drive wheel (222).

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