Drive unit with electric motor and outer rotating tube for a hinge or linear power transmission

Abstract

The invention relates to a drive unit (10) comprising a casing (14) that can be mounted in a stationary manner and a motor (12) which is surrounded by the casing (14) and is operatively connected to a rotatable tube (16) surrounding said casing via a Wolfrom transmission (18). The tube (16) has a linear driver on its outer circumference for rotationally driving a hinge or for linearly driving a cable or a toothed rack. The invention further relates to a hinge drive assembly for driving a flap or door relative to the frame thereof. Such a hinge drive assembly comprises, in addition to the drive unit (10), a flap or door and the associated frame on which the flap or door is pivotably mounted.

Description

[0001] DRIVE UNIT WITH ELECTRIC MOTOR AND OUTER ROTATING TUBE FOR A HINGE OR LINEAR POWER TRANSMISSION

[0002] Description

[0003] The invention relates to a motor-driven drive unit with a stator that can be mounted, for example, on a fixed, higher-level component, such as a door frame, and a rotor driven by a motor, which can be connected to a driven element, for example, a door leaf.

[0004] To drive the hinge, the rotation output of the motor must be reduced to obtain sufficient torque for operating the door or similar mechanism, even with a small motor. One could consider using a multi-stage planetary gear unit, such as the one known from EP2019937B1. However, such multi-stage planetary gear units, with the required high gear ratio on the order of 1:500, have a considerable axial dimension, making the entire drive unit relatively bulky.

[0005] The object of the invention is therefore to provide a drive unit of the above-mentioned type which can be designed to be particularly compact, especially with regard to axial length.

[0006] To solve the problem, a drive unit is provided with a stator and a motor at least partially enclosed by the stator in a radial direction with respect to a longitudinal center axis of the motor, wherein the motor is operatively connected via a Wolfrom gearbox to a rotor which at least partially encloses the stator in a radial direction with respect to a longitudinal center axis of the stator, wherein the rotor is equipped on its outer circumference for the rotary drive of a hinge or for the linear drive of a linear force transmission element.

[0007] Within the scope of the present invention, "at least partial" enclosure of the motor by the stator and / or of the stator by the rotor can mean that the stator overlaps the motor and / or the rotor overlaps the stator, viewed axially parallel to the respective longitudinal center axis, by at least 70%, in particular at least 80%, and more preferably at least 90%. Additionally, the "at least partial" enclosure of the motor by the stator and / or of the stator by the rotor can mean an enclosure in the respective circumferential direction of at least 70%, in particular at least 80%, and more preferably at least 90%, advantageously a complete, i.e., closed, enclosure.

[0008] The motor can be, in particular, an electric motor.

[0009] The Wolfrom gear set has a very short axial length, even at very high gear ratios. A Wolfrom gear set is typically a coupling gear consisting of a sun gear meshing with a number of planet gears. In particular, each planet gear is designed with stepped teeth, such that, viewed axially, it has a first circumferential toothed section and a second circumferential toothed section that differs from the first. Each planet gear is supported at its first toothed section by a first internally toothed ring gear and at its second toothed section by a second internally toothed ring gear. Advantageously, the second internally toothed ring gear can form the output.

[0010] Since, according to the invention, the motor is now enclosed by the stator and the stator is in turn enclosed by the rotor, which also encloses the Wolfrom gearbox, approximately at its end, a design of the drive unit is obtained that is even further optimized with regard to the required installation space.

[0011] The drive unit according to the invention can thus be integrated directly into a door or flap hinge, leaving the installation space surrounding the hinge free of drive unit components. This allows for a motorized drive of the door or flap even in situations with severely limited installation space dictated by the door or flap arrangement.

[0012] A further advantage of the drive unit designed according to the invention lies in the arrangement of the rotor surrounding the motor, since it thus protectively surrounds the motor together with the stator and Wolfrom gearbox, so that, in the event of a mechanical impact on the drive unit, the motor and the possibly delicate gearbox, for example the gear structures, can be protected from damage.

[0013] In one conceivable embodiment, both the stator and the rotor can be designed as essentially cylindrical, hollow components. Furthermore, the motor can have an essentially cylindrical base shape. Thus, the motor can be radially surrounded, at least partially, by the essentially cylindrical stator, and the stator, in turn, at least partially by the essentially cylindrical rotor. The longitudinal axes of the respective cylindrical base shapes of the stator and the rotor, and especially of the motor, can be arranged coaxially. In other words, the axis of rotation of the rotor, about which it is rotatably mounted, can coincide with the longitudinal axis of the stator.

[0014] In a preferred embodiment, a first planetary gear set of the Wolfrom transmission, driven directly by the motor, meshes with an internal toothing of the stator, and a second planetary gear set, projecting axially beyond the stator, meshes axially outside the stator with an internal toothing of the rotor. With reference to the Wolfrom transmission design described above, the internal toothing of the stator can thus correspond to the "first internally toothed ring gear" and the internal toothing of the rotor to the "second internally toothed ring gear".

[0015] The individual planetary gears can be formed in one piece. That is, the first and second stages of each planetary gear can be formed on the outside of a common monolithic base body. The planetary gears and / or the stator and / or the rotor can comprise metal and / or plastic. In particular, the planetary gears and / or the stator and / or the rotor can be manufactured by forging, rolling, milling, casting, injection molding, or 3D printing.

[0016] The stator can be mounted at its axial end furthest from the Wolfrom gearbox via a first end support on a higher-level assembly, and the rotor can be rotatably mounted at one axial end on the first end support and at its opposite end, particularly the end adjacent to the Wolfrom gearbox, on a second end support that can be mounted on the higher-level assembly. By supporting the rotor at both ends on the end supports, undesirable tilting and bending moments can be avoided. This, in turn, can result in a high load-bearing capacity for the rotor.

[0017] Preferably, an axial end of the rotor located away from the Wolfrom gearbox can be axially supported on the first end support via a thrust washer, wherein the thrust washer can be formed by an end flange of the stator. The thrust washer can support the rotor axially as well as radially relative to the stator and / or relative to at least one of the two end supports. The thrust washer of the rotor can also, at least in an axial direction, come into contact with an end flange of the stator, which is formed at an axial end of the stator located away from the Wolfrom gearbox.

[0018] Furthermore, the first end carrier can be multi-part, in particular axially two-part, with an end cap part supporting the motor and stator and closing it off to the outside, and a bearing carrier supporting a rotary bearing for the rotor. The motor, including the stator, rotor, and Wolfrom gearbox, can be inserted axially as a unit through this bearing carrier up to the second end carrier, until the rotor engages with a second rotary bearing on the second end carrier. First, the bearing carrier of the first end carrier and the second end carrier can be mounted on a higher-level assembly, for example, a door frame. Then, the assembly of the motor, stator, rotor, and Wolfrom gearbox can be inserted axially through the bearing carrier up to the second end carrier. In this way, the mountability of the drive unit according to the invention to the elements to be moved by the motor can be significantly improved, especially in cases of severely limited installation space.

[0019] The end cap can be designed to accommodate an electrical cable harness and route it from an outer to an inner surface. This electrical cable harness can be used, for example, to supply power to the motor and / or to transmit control signals to the motor, enabling it to operate in a predetermined manner. Naturally, the electrical cable harness can also be used to transmit signals away from the motor, for example, to a control unit. Such signals could include, for example, temperature and / or actual rotational speed, or similar information, for which appropriate sensors can be provided in the vicinity of the motor.

[0020] It should be mentioned here that the second end support can also be multi-part, especially two-part. For example, the end support can be closed by a cover in the axial direction.

[0021] In particular, the end cap part can have a sealing unit in the area of ​​the cable entry, which is designed to fluidically seal an inner side of the end cap part to an outer side. This protects the motor and / or sensors and / or electrical contacts located near it from contact with water and thus from corrosion, thereby increasing its service life and expanding the application possibilities of the drive unit according to the invention.

[0022] In this context, the two end carriers can be attached to a support element, in particular, in the case of a hinge, to a first hinge leaf, and a driven element, in particular, in the case of a hinge, a second hinge leaf, can be attached to or detachably attached to the rotor. Thus, the two end carriers can be attached to a common support element, which in turn can be mounted on the higher-level assembly, so that the two end carriers, in particular the bearing support of the first end carrier and the second end carrier, can be pre-assembled as a unit on the higher-level assembly. The main axis of the drive unit can then be coaxial with other hinges of the door or the like, so that the drive unit itself can assume the function of a hinge.

[0023] Advantageously, a drive element can protrude from the outer circumference of the rotor for hinge or linear operation, particularly in the form of a strip extending along the length of the rotor. This drive element can then be used universally for various configurations, either for driving a hinge leaf or, for example, a gear for a linear drive. The drive element can be manufactured as a separate component that is connected to the rotor, for example, by screws or welds. Alternatively, the drive element can also be formed as a section of the rotor manufactured as a single piece. This can be achieved, for example, by injection molding or 3D forming of a rotor-drive element unit.

[0024] Furthermore, the first end carrier and / or the second end carrier may have a recess designed and dimensioned to allow the rotor, with the attached driver, to be inserted into or passed through the first end carrier and / or the second end carrier in a predetermined rotational position in which the recess and the driver are aligned. This allows the rotor, with the driver attached (for example, in the case of a multi-part rotor-driver unit) or formed (for example, in the case of a one-piece rotor-driver unit), to be mounted on the first end carrier and / or the second end carrier. In the case of a multi-part rotor-driver unit, this significantly simplifies the mounting of the driver to the rotor.If the rotor-driver unit passes through the respective end carrier, it can be dimensioned in such a way that the rotor with the driver can rotate freely relative to the stator.

[0025] To implement the drive unit according to the invention for actuating a linear drive, a gear for meshing with a rack can be arranged on the outer circumference of the rotor. For example, instead of the hinge wing, the rack or another toothed element can be arranged, which in turn is connected to a component to be moved, such as a drawer. Through the meshing of the gear with the rack, a rotation of the rotor of the drive unit according to the invention, and thus of the gear, can be converted into a linear movement of the rack. Here, too, the gear can be formed integrally with the rotor, in particular by means of teeth formed on the outer circumference of the rotor, or the gear can be connected to the rotor. In the latter case, the driver described above can be configured to transmit a rotation of the rotor to the gear.

[0026] Furthermore, the drive unit according to the invention can also be designed as a linear drive such that a pull cord, in particular a pull rope, can be attached to and wound around the outer circumference of the rotor. This means that the drive unit according to the invention can be used like a winch. The pull rope can be wound directly onto the rotor or onto a rope winding unit connected to it. A separate rope winding unit can be advantageous, for example, if the rotor itself is too delicate to absorb or transmit the forces of the pull rope. The pull rope can, for example, be connected to a door leaf. In this way, a motor-operated closing of the door leaf can be achieved. Opening the door leaf can then be carried out, for example, manually by a user or driven by a spring mechanism.For this purpose, it may be provided that the drive unit, in particular the motor, has an idle function in which the pull rope can be freely unwound from the rotor or the rope receiving unit.

[0027] The motor can be axially and radially supported by a support ring on a decoupling element. This ensures and maintains the positioning and / or orientation of the motor within the drive unit relative to the stator and / or rotor.

[0028] The support ring can, for example, be designed such that it makes contact with the motor at one axial end and makes contact with the first end support, in particular the end cap part, via the decoupling element at its other axial end. Thus, the support ring can be encased between the motor and the first end support, in particular the end cap part, thereby pre-loading the motor towards the Wolfrom gearbox and, if necessary, against a stop formed on the stator for the motor.

[0029] According to a further aspect of the present invention, the problem described above is solved by a hinge drive arrangement for driving a flap or door relative to a frame of the flap or door, wherein the hinge drive arrangement comprises a flap or door, a frame on which the flap or door is pivotably mounted, and a drive unit according to the invention.

[0030] With regard to this hinge drive arrangement according to the invention, reference should be made at this point to the features, effects and advantages described in connection with the drive unit according to the invention, which can also be applied to the hinge drive arrangement according to the invention, and vice versa.

[0031] The hinge drive arrangement according to the invention can thus be used for the motorized drive of doors or flaps, in particular vehicle doors, such as side doors, or vehicle flaps, such as a tailgate or a flap that closes a compartment arranged in the vehicle, or even windows. A significant advantage of the hinge drive arrangement according to the invention, and of the drive unit according to the invention in general, is its particularly small size combined with a high gear ratio.

[0032] The present invention is described in greater detail below with reference to exemplary embodiments and the accompanying drawings. It illustrates:

[0033] Figure 1 shows an axial section through a drive unit according to the invention;

[0034] Figure 2 shows an enlarged section through the drive unit designed as

[0035] Hinge drive;

[0036] Figure 3 is a partial enlargement from the circled section Z of Figure 2;

[0037] Figure 4 shows an exterior view of the version shown in Figure 2;

[0038] Figure 5 shows an exploded view of the embodiment of Figure 1 as

[0039] Hinge drive;

[0040] Figure 6 shows a variant with rack and pinion drive; and

[0041] Figure 7 shows a variant as a winch. A drive unit according to the invention, for example for a motorized drive of a door or window hinge, or also for a motorized drive of a linear drive, as described later, is generally designated by reference numeral 10.

[0042] As can be seen particularly in Figures 1 and 2, the drive unit 10 comprises a cylindrical electric motor 12, which is arranged coaxially in a tubular stator 14 extending along its axial length, such that the electric motor 12 is completely surrounded by the stator 14 on its radial outer side. The stator 14, in turn, is almost completely surrounded on its radial outer side by a tubular rotor 16, which is designed and mounted to be rotatably displaceable relative to the stator 14 and the electric motor 12. The electric motor 12, the stator 14, and the rotor 16 are arranged such that their longitudinal axes, or the axis of rotation of the rotor 16, coincide, as shown by axis X in Figures 1 and 2.

[0043] The electric motor 12 drives the rotor 16 rotationally via a Wolfrom gearbox 18 arranged at one axial end of the rotor. The Wolfrom gearbox 18 comprises a first planetary gear stage 20 adjacent to the electric motor 12 and a second planetary gear stage 22 on the other side. The first planetary gear stage 20 includes a sun gear 24, which is connected to an output shaft of the electric motor 12 in a rotationally force-transmitting manner. Three planet gears 26 are arranged around the outer circumference of the sun gear 24 of the first planetary gear stage 20, meshing with the sun gear 24 of the first planetary gear stage 20. Furthermore, the planet gears 26 mesh with an internal toothing 28 formed on or attached to the inner circumference of the stator 14 (see also Figure 3). The planet gears 26 do not have a planet carrier.

[0044] The second planetary gear stage 22 comprises a sun gear 30, which is arranged coaxially with the sun gear 24 of the first planetary gear stage 20 and is rotatably mounted relative to the sun gear 24 of the first planetary gear stage 20. The second planetary gear stage 22 also comprises three planet gears 32, which are rigidly connected to the planet gears 26 of the first planetary gear stage 20, i.e., secured to each other both rotationally and translationally. This can be achieved, in particular, by forming the first planetary gear stage 20 and the second planetary gear stage 22 as a single unit on a common base body. The planet gears 26 of the first planetary gear stage 20 have a slightly different, and in this case larger, diameter than the planet gears 32 of the second planetary gear stage 22. The planet gears 32 of the second planetary gear stage 22 mesh with an internal toothing 34 that is formed on or attached to the inner circumference of the rotor 16.The transmission ratio of this Wolfrom gear 18 of the illustrated embodiment can be in the range of 1:100 to 1:500, which corresponds to an output torque of approximately 20 Nm to 70 Nm. It should be noted here that conventional multi-stage planetary gear drives would require four to five stages to achieve such a transmission ratio and would therefore be significantly longer axially than the Wolfrom gear 18 of the drive unit 10 described here according to the invention.

[0045] The internal toothing 34 of the second planetary gear stage 22 projects radially inwards at the corresponding axial end of the rotor 16 and is supported axially and radially by the stator 14.

[0046] The electric motor 12, the stator 14, and the rotor 16 are each mounted at their respective axial ends on a first end support 36 located away from the Wolfrom gearbox 18 and on a second end support 38 adjacent to the Wolfrom gearbox 18. The two end supports 36 and 38 are designed here as essentially ring-shaped mounts.

[0047] The stator 14 is in contact with a tubular decoupling element 40 such that the stator 14 is supported radially on the inside of this tubular decoupling element 40 at this end. Furthermore, a radially projecting end flange 42 is formed at this end of the stator 14, which, acting as a thrust washer, provides axial support for the stator 14 on the first end support 36.

[0048] In the illustrated embodiments, the first end carrier 36 is designed in two parts. The first end carrier 36 comprises an end cap part 44 and a bearing carrier 46. The end cap part 44, against which the decoupling element 40 is supported at least axially, closes off access to the electric motor 12 except for a cable entry 48 for a cable harness 50. The cable harness 50 can serve to supply power and / or control the electric motor 12. The cable harness 50 has a connector 52 at its free end opposite the electric motor 12. The cable harness 50 can, for example, be enclosed by a bellows-shaped protective sleeve 54 (see Figure 1) to protect it from environmental influences, such as dirt and moisture.

[0049] The bearing support 46, as the second part of the first end support 36, is connected to the end cap part 44 on its side facing the Wolfrom gearbox 18, for example by bolting, welding, or bonding. The bearing support 46 is essentially ring-shaped, with a first rotary bearing 56, for example a support bearing, formed in its inner circumference, which rotatably supports the rotor 16 on its outer circumference. The electric motor 12 is further supported by a support 58, which is supported radially and axially by the decoupling element 40, so that the electric motor 12 is forced towards the Wolfrom gearbox 18 when the end cap part 44 is connected to the bearing support 46.

[0050] The second end support 38 is a single piece and essentially cap-shaped. It covers the side of the Wolfrom gearbox 18 opposite the electric motor 12 and seals it off to the outside. The second end support 38 carries a second rotary bearing 60 on its inner circumference, which rotatably supports the other axial end of the rotor 16 adjacent to the Wolfrom gearbox 18. Axial bearing projections 62 and 64 extend from the second end support 38 (see Figure 1), which axially support the sun gear 30 and the planet gears 32 of the second planetary stage 22.

[0051] In order to transfer the rotary motion of the rotor 16 to the output elements 66 and 68 described later, a driver 70 is attached to the outer circumference of the rotor 16, here in the form of an axially extending strip.

[0052] The two end carriers 36 and 38 are designed to be permanently mounted on a higher-level assembly, for example, a door or window frame. To facilitate assembly, the first end carrier 36, or in the case of a two-part design, at least the bearing support 46 of the first end carrier 36, and the second end carrier 38 can be attached to or integrally connected with a common support element 72 that can be mounted on the higher-level assembly. After mounting on the higher-level assembly, a pre-assembled unit comprising the electric motor 12, the stator 14, the rotor 16, and the Wolfrom gearbox 18 can be inserted axially through the bearing support 46, in particular until the rotor 16 is seated in its predetermined position in its respective rotary bearings 56, 60.

[0053] In order to ensure that the driver 70 can already be pre-mounted on the rotor 16 in the pre-assembled assembly, the first end carrier 36 or the bearing carrier 46 has a recess 74, so that the axially projecting driver 70 can pass through the recess 74 and the rotor 16 through the opening of the bearing carrier 46.

[0054] The second end carrier 38 is designed in two parts and is closed axially by a cover 76. This protects the Wolfrom gearbox 18 from external influences. The cover 76 can also function as a service hatch, providing access to the Wolfrom gearbox 18 for maintenance and / or repair. The cable harness 50 can come into contact with a sealing unit 78 in the area of ​​the end cap part 44. This sealing unit is located on the inside of the end cap part 44 to provide a fluidic seal between the inside and outside of the end cap part 44.

[0055] In a first embodiment, as shown in Figures 4 and 5, the drive unit 10 according to the invention is designed as a hinge drive. The support element 72 is designed as a plate-shaped hinge leaf 72 projecting tangentially from the drive unit 10. For example, for fixed mounting on a door or window frame, the main axis of the drive unit 10, i.e., the motor axis, can be aligned coaxially with other hinges of the door (not shown). A further plate-shaped hinge leaf 66, optionally partially enclosing the rotor 16, is attached to the outer circumference of the rotor 16, engaging with the driver 70. This further hinge leaf 66 is then attached to the corresponding door or window sash. The door can be a building door, a furniture door, or a vehicle door, for example, with a vertical or horizontal axis of rotation, as in the case of a vehicle tailgate.

[0056] In a further embodiment, designated by reference numeral 10' in Figure 6, a gear 80 can be arranged on the outer circumference of the rotor 16. In this embodiment, the gear 80, particularly if manufactured separately from the rotor 16, can be operatively connected to the rotor 16 via the driver 70 such that the gear 80 rotates together with the rotor 16. Thus, the drive unit 10' according to the invention can be designed as a linear drive in which the gear 80 meshes with a rack 68. In this way, the rotary motion of the gear 80 can be converted into a translational, and in particular linear, motion via the rack 68. For example, a drawer or a linearly movable cover can be driven by a motor.

[0057] In a further embodiment, designated by reference numeral 10" in Figure 7, one end of a cable 82 can be attached to the outer circumference of the rotor 16'. When the rotor 16' rotates, the cable 82 can be wound onto or unwound from the rotor 16', depending on its direction of rotation. In this way, the drive unit 10" according to the invention can be used as a winch. For example, a pulling force can be exerted on a door, flap, or cover via the cable 82 to cause the door / flap / cover to move.

Claims

Claims 1. Drive unit (10, 10', 10") with a stator (14) and a motor (12) at least partially enclosed in the radial direction by the stator (14) with respect to a longitudinal central axis (X) of the motor (12), wherein the motor (12) is operatively connected via a Wolfrom transmission (18) to a rotor (16) which at least partially encloses the stator (14) in the radial direction with respect to a longitudinal central axis (X) of the stator (14), wherein the rotor (16) is connected at its outer circumference to the rotary drive of a hinge (66, 72) or to the linear drive of a is equipped with a linear force transmission element (68, 82).

2. Drive unit (10, 10', 10") according to the preceding claim, characterized in that a first planetary gear set (26) of the Wolfrom gear set (18) driven directly by the motor (12) meshes with an internal toothing (28) of the stator (14), and a second planetary gear set (32) projecting axially beyond the stator (14) meshes axially outside the stator (14) with an internal toothing (34) of the rotor (16).

3. Drive unit (10, 10', 10") according to one of the preceding claims, characterized in that the stator (14) can be mounted on a superior assembly at its axial end remote from the Wolfrom gearbox (18) via a first end carrier (36), and the rotor (16) is rotatably mounted at one axial end on the first end carrier (36) and at its opposite second end, in particular adjacent to the Wolfrom gearbox (18), on a second end carrier (38) that can be mounted on the superior assembly.

4. Drive unit (10, 10', 10") according to the preceding claim, characterized in that an axial end of the rotor (16) located away from the Wolfrom gear (18) is connected to the first via a thrust washer (42). The end carrier (36) is axially supported, wherein the thrust washer (42) is formed by an end flange (42) of the stator (14).

5. Drive unit (10, 10', 10") according to claim 3 or 4, characterized in that the first end carrier (36) is multi-part, in particular axially two-part, with an end cap part (44) supporting the motor (12) together with the stator (14) and closing it off to the outside, and a bearing carrier (46) supporting a rotary bearing (56) for the rotor (16), through which the motor (12) together with the stator (14), rotor (16) and Wolfrom gearbox (18) can be inserted axially as a unit up to the second end carrier (38), until the rotor (16) engages with a second rotary bearing (60) on the second end carrier (38).

6. Drive unit (10, 10', 10") according to the preceding claim, characterized in that the end cap part (44) is configured to receive an electrical cable harness (50) and to guide it from an outside of the end cap part (44) to an inside of the end cap part (44).

7. Drive unit (10, 10', 10") according to the preceding claim, characterized in that the end cap part (44) has a sealing unit (78) in the area of ​​the cable passage, which is configured to fluidically seal an inside of the end cap part (44) to an outside of the end cap part (44).

8. Drive unit (10, 10', 10") according to one of claims 3 to 7, characterized in that the two end carriers (36, 38) are attached to a support element (72), in particular, in the case of a hinge, to a first hinge wing (72), and that an output element (66), in particular, in the case of the hinge, a second hinge wing (66), is attached or detachably attached to the rotor (16).

9. Drive unit (10, 10', 10") according to one of the preceding claims, characterized in that a driver (70) projects from the outer circumference of the rotor (16) for hinge (10) or linear operation (10', 10"), in particular in the form of a strip (70) extending over the length of the rotor (16).

10. Drive unit (10, 10', 10") according to the preceding claim and one of claims 3 to 8, characterized in that the first end carrier (36) and / or the second end carrier (38) have a recess (74) which is designed and dimensioned to allow the rotor (16) with the driver (70) attached thereto to be inserted into the first end carrier (36) and / or the second end carrier (38) or to be passed through the first end carrier (36) and / or the second end carrier (38) in a predetermined rotational position in which the recess (74) and the driver (70) are aligned with each other.

11. Drive unit (10') according to one of the preceding claims, characterized in that a gear (80) for engagement with a rack (68) is arranged on the outer circumference of the rotor (16).

12. Drive unit (10") according to one of claims 1 to 10, characterized in that a traction element (82), in particular a traction cable (82), is attached to the outer circumference of the rotor (16) as a linear drive and wound around it.

13. Drive unit (10, 10', 10") according to one of the preceding claims, characterized in that the motor (12) is axially and radially supported on a decoupling element (40) via a support ring (58).

14. Drive unit (10, 10', 10") according to claim 13, characterized in that the support (58) is designed such that it comes into contact with the motor (12) at one axial end side and comes into contact with the first end carrier (36), in particular the end cap part (44), at its other axial end side via the decoupling element (40).

15. Hinge drive arrangement for driving a flap or door relative to a frame of the flap or door, wherein the hinge drive arrangement comprises a flap or door, a frame on which the flap or door is pivotably mounted, and a drive unit (10) according to one of the preceding claims.

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