DRIVE DEVICE FOR MOVING A LEAF

Abstract

A drive device for moving a leaf, in particular a door leaf or window leaf, includes an electric machine. The electric machine is an axial flux machine having a stator, in particular a single stator, and a rotor, in particular a single rotor, which is rotatable relative to the stator about a machine axis.

Claims

1. A drive device for moving a leaf with an electric machine, wherein the electric machine is designed as an axial flux machine comprising a single, stator and a single, rotor, configured to be rotated about a machine axis with respect to the stator.

2. The drive device according to claim 1, wherein the stator has one or a plurality of coils, wherein the coil or coils of the stator are arranged such that a magnetic flux is generated through the coil or coils in a direction parallel to the machine axis.

3. The drive device according to claim 1, wherein the rotor comprises at least one permanent magnet, wherein the permanent magnet is arranged along a virtual circle around the machine axis and spans a first angular range, and the stator comprises a stator base with at least one stator tooth protruding from the stator base, wherein the stator tooth is arranged along a virtual circle around the machine axis and spans a second angular range, wherein the ratio of the first angular range as a dividend to the second angular range is in the range from 1.1 to 1.6.

4. The drive device according to claim 2, wherein the ratio between the number of permanent magnets as a dividend and the number of coils is in a range from 1.0 to 1.6.

5. The drive device according to claim 1, wherein the stator comprises a stator base which has a plate-shaped, base section and a plurality of stator teeth protruding from a common surface of the base section, in the axial direction of the electric machine, whereby at least one coil is wound directly or indirectly around at least one, each, stator tooth and/or in that at least one, each, stator tooth is connected to the stator base in a form-fitting and/or force-fitting and/or materially-bonded manner or is formed in one piece with the stator base.

6. The drive device according to claim 5, wherein at least one of the stator teeth has an electrically insulating, tooth cover, wherein the stator has a plurality of coils and at least one of the coils is wound around the tooth cover.

7. The drive device according to claim 1, wherein the stator comprises a stator base, wherein the stator base has a bearing mount for receiving a roller bearing or a slide bearing, wherein the drive device comprises the slide bearing or the roller bearing for rotatably bearing the rotor with respect to the stator, wherein the slide bearing or the roller bearing is received in the bearing mount of the stator base.

8. The drive device according to claim 1, wherein the drive device has a circuit board and the stator has one or a plurality of coils, wherein the coils are electrically connected to the circuit board.

9. The drive device according to claim 1, wherein the drive device has a gear coupled to the electric machine, and the gear is designed as a toothed gear.

10. The drive device according to claim 9, wherein at least one first gear element of the gear is arranged coaxially to the electric machine, and the rotor is connected in a rotationally-fixed manner to the first gear element of the gear.

11. The drive device according to claim 9, wherein the gear has a first gear element, which is connected in a rotationally-fixed manner to the rotor, and a second gear element, wherein the second gear element is operatively connected with the first gear element, wherein an axis of rotation of the second gear element runs in an installation space between the machine axis and an outer lateral surface of the rotor that is extended virtually in the axial direction of the electric machine.

12. The drive device according to claim 1, wherein the rotor is connected in a rotationally-fixed manner to a lever to form a connection of the drive device to the leaf or to a frame.

13. The drive device according to claim 1, wherein the drive device has a closer module with at least one mechanical energy storage device and at least one transmission element for translating a linear movement of the mechanical energy storage device into a rotational movement of the transmission element, wherein the drive device has a drive module with a drive housing, wherein the axial flux machine and/or a gear coupled to the axial flux machine is arranged in the drive housing.

14. The drive device according to claim 13, wherein the gear has a transmission ratio as a quotient of the speed of the rotor as a dividend and the speed of the transmission element, which is less than 125.

15. A use of a drive device according to claim 1 in a swing leaf drive or in a sliding door drive or in a revolving door drive.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0085] Further details and advantages of the disclosure will be explained below on the basis of the exemplary embodiments shown in the figures. They show:

[0086] FIG. 1 an exemplary embodiment of a drive device according to the disclosure in a schematic sectional representation;

[0087] FIG. 2 the drive device from FIG. 1 as a detail in a perspective view;

[0088] FIG. 3 a transmission element as a detail in a top view,

[0089] FIG. 4 a further exemplary embodiment of a drive device with a planetary gear,

[0090] FIG. 5 the drive device from FIG. 4 with the revolving wheel removed,

[0091] FIG. 6 an axial flux machine in a basic representation in section,

[0092] FIG. 7 a stator of the axial flux machine from FIG. 6 as a detail,

[0093] FIG. 8 a circuit board as a detail in top view of a first end face, and

[0094] FIG. 9 the circuit board from FIG. 8 in top view of an end face opposite the first end face.

DETAILED DESCRIPTION OF THE DRAWINGS

[0095] The same parts are always provided with the same reference numerals in the different figures, which is why they are generally also only described once.

[0096] FIG. 1 shows a drive device 1 for moving a leaf. The drive device 1 has a drive module 3. The drive module 3 has a drive housing 4, an electric machine 6 with a machine axis X1, and a gear 7 with an output shaft 8 mounted so as to be rotatable about an output axis X2 for connection to a lever 9.

[0097] The drive device 1 also has a closer module 11 which has a closer housing 12 and a mechanical energy storage device 13.

[0098] The drive device 1 has an interface element for forming an operative connection between the drive module 3 and the closer module 11.

[0099] The gear 7 has a transmission ratio as a quotient of the speed of the rotor as a dividend and the speed of the output shaft, with the transmission ratio being less than 125, preferably less than 100, particularly preferably less than 75.

[0100] The lever 9 is used to form a connection between the drive device 1 and the leaf, i.e. with the exemplary door leaf or window leaf or with a frame, with the drive device 1 being able to be mounted either on the frame or on the leaf. Within the meaning of the disclosure, the term frame also includes a door frame or window frame. In particular, the lever 9 can be designed in such manner that a voltage supply of the electric machine 6 and/or at least one control signal for the electric machine 6 can be transmitted via the lever 9 to the drive module 3, in particular to the electric machine 6 and/or a control module 26. The lever 9 is guided in a slide rail 2, which in the exemplary embodiment represented in FIGS. 1 and 2, would be mounted on a frame, not represented there.

[0101] The drive housing 4 has a first opening 16, with the closer housing 12 having a second opening 17. As can be seen in FIG. 1, the drive housing 4 and the closer housing 12 are arranged in relation to one another in such manner that the closer module 11, in particular the energy storage device 13, and the gear 7, in particular the output shaft 8, are in operative connection with one another through the first opening 16 and the second opening 17 by means of the interface element.

[0102] The drive module 3 and/or the closer module 11 is arranged at least partially, in particular completely, within a superordinate housing 5. The drive housing 4 is connected to the superordinate housing 5 and/or to the closer housing 12 in a form-fitting and/or force-fitting and/or materially-bonded manner. The closer housing 12 is connected to the superordinate housing 5 in a form-fitting and/or force-fitting and/or materially-bonded manner. One or a plurality of such connections are designed, for example, in the form of at least one screw connection.

[0103] It can be seen in FIGS. 1 and 2 that the output axis X2 is parallel to the machine axis X1.

[0104] The closer module 11 has a transmission element 18 for translating a linear movement of the energy storage device 13 into a rotational movement of the transmission element 18 about an axis of rotation X3 of the transmission element 18. As can be seen by way of example in FIG. 1, the output axis X2 and the axis of rotation X3 of the transmission element 18 are spaced apart from one another and run parallel to one another. The transmission element 18 is designed as a cam disc, specifically as a heart-shaped stroke-producing cam disc, and is rotatably mounted in a rotationally-fixed manner with a closer wheel 10.

[0105] For example, the mechanical energy storage device 13 is designed as a compression spring. The compression spring is connected via a linkage carriage 27 to the transmission element 18 for translating the linear movement of the mechanical energy storage device 13 into a rotational movement of the transmission element 18. The linkage carriage 27 has sliding elements 21, which can be seen in FIG. 2. The linkage carriage 27 can be seen in FIG. 4.

[0106] The closer wheel 10 is arranged in a coaxial and rotationally-fixed manner in relation to the transmission element 18 for translating the linear movement of the energy storage device 13 into a rotational movement of the transmission element 18.

[0107] The gear 7 has an output wheel 22, namely an output gear wheel, which is coaxial and rotationally-fixed with the output shaft 8, with the output wheel 22 being engaged with the closer wheel 10.

[0108] In the exemplary embodiment of FIGS. 1 and 2, the interface element is formed by the output wheel 22.

[0109] For example, the drive housing 4 has a first wall 23 with an output opening 24 for the, in particular, rotationally-fixed connection of the output shaft 8 to the lever 9, a second wall adjoining the first wall 23 and a third wall opposite the second wall, with the drive device 1 being designed so as to be fastened both with the second wall and the third wall facing towards the leaf, i.e. the exemplary door leaf. The same can apply to the closer housing 12. The drive housing 4, but also the closer housing 12, can each be cuboid in order to enable assembly on both sides.

[0110] The control module 26, which has a control device, can also be seen in FIG. 1. The control module 26 is arranged at least partially, in particular completely, within the superordinate housing 5 of the drive device 1.

[0111] FIG. 3 shows a special embodiment, with the transmission element 18 being formed as a cam disc, specifically as a heart-shaped stroke-producing cam disc. As can also be seen in FIG. 3, a fixed axle body 19 is arranged, with the transmission element 18 and the closer wheel 10 being rotatably mounted on the axle body 19.

[0112] In the FIGS. 4 and 5, the drive device 1 is represented in a further configuration, with the optional gear 7, in contrast to the exemplary embodiment of FIGS. 1 and 2, being designed as a planetary gear.

[0113] As a planetary gear, the gear 7 has at least one Wolfrom stage. Such a Wolfrom stage has a first gear stage and a second gear stage. The first gear stage comprises a sun gear, a plurality of first planets 31 fastened to a planetary carrier and driven by the sun gear, and a first, stationary ring gear. The sun gear, the planetary carrier and the first stationary ring gear cannot be seen in FIGS. 4 and 5 due to the section selected. The second gear stage comprises a second rotatable ring gear 33, second planets 32 which are rotationally-fixed, in particular in one piece, with the first planets 31. The second planets 32 drive the second ring gear 33. The second ring gear 33 forms the power output of the planetary gear. In FIG. 5, the second ring gear is removed.

[0114] The gear 7 according to the exemplary embodiment of FIGS. 4 and 5 is designed as a combination of planetary gear and spur gear. The second ring gear 33 of the planetary gear has external teeth 34 and acts as a spur gear. The second ring gear 33 is engaged with the closer wheel 10 of the closer module 11. In the exemplary embodiment of FIGS. 4 and 5, the closer wheel 10 forms the interface element.

[0115] In the exemplary embodiment of FIGS. 4 and 5, the output axis X2 is coaxial with the machine axis X1.

[0116] In the exemplary embodiments described, the electric machine 6 is designed as an axial flux machine.

[0117] The electric machine 6 is represented in principle as a detail in FIG. 6. The electric machine 6 has a stator 36 and a rotor 37. The stator 36 is also represented as a detail in FIG. 7 and has a plate-shaped stator base 38 and a plurality of stator teeth 39 protruding from the stator base 38 in the axial direction of the electric machine 6. A coil 41 is arranged around each of the stator teeth 39. Each stator tooth 39 has an electrically insulating tooth cover 45, with the stator 36 having a plurality of coils 41 and each of the coils 41 being wound around the tooth cover 45 and therefore indirectly via the tooth cover 45 around the stator tooth 39. The stator teeth 39 pass through a circuit board 44 on which the coils 41 are contacted.

[0118] It can be seen in FIG. 6 that the stator 36 also comprises a stationary bolt 50, with the bolt 50 having a bearing mount 46 for receiving a roller bearing 47. A roller bearing 47 with balls 47′ is represented in FIG. 6 as an example. The drive device 1 comprises the roller bearing 47 for the rotatable bearing of the rotor 37 with respect to the stator 36, with the roller bearing 47 being received on the bearing mount 46 of the bolt 50. The rotor 37 is rotatably mounted on the stator 36 by means of the roller bearing 47. In an embodiment that is not represented, a bearing mount can be provided directly on the stator base, on which a roller bearing can be received.

[0119] The rotor 37 comprises a plurality of permanent magnets 48. Each permanent magnet 48 is formed in a plate shape. The rotor 37 has a rotor plate 49 in the form of a rotor disc. Furthermore, each permanent magnet 48 protrudes from the rotor plate 49 of the rotor 37 in the axial direction of the electric machine, in particular in the direction of the stator 36.

[0120] As can best be seen from FIGS. 1 and 2, the gear 7 has a first gear element 42 which can be rotated coaxially with the machine axis X1 and which is connected to the rotor 37 in a rotationally-fixed manner. The gear 7 also has a second gear element 43, which is operatively connected to the first gear element 42, with an axis of rotation X4 of the second gear element 43 running in an installation space between the machine axis X1 and an outer lateral surface of the rotor 37 that is extended virtually in the axial direction of the electric machine 6 and parallel to the machine axis X1.

[0121] In the exemplary embodiment of FIGS. 4 and 5, the first gear element 42 is formed by the sun gear, with the second gear element 43 being formed by the planet 32.

[0122] A circuit board 44, which is arranged in the installation space between the stator base 38 and the rotor 37, can also be seen in FIGS. 2 and 4 as well as 5 and 6. The circuit board 44 is arranged parallel to the stator base 38. The circuit board 44 is arranged in a second plane parallel to the stator base 38, with the second plane being interrupted by each stator tooth 39 of the stator 36.

[0123] The circuit board 44 is represented as a detail in FIGS. 8 and 9. FIG. 8 shows a top view of a first end face 51 of circuit board 44. The first end face 51 is oriented in the direction of the stator 36 in the represented exemplary embodiments. FIG. 9 shows a top view of an end face 52 opposite the first end face 51.

[0124] The circuit board 44 has a number of breakthroughs 53 corresponding to the number of stator teeth 39, through which breakthroughs the stator teeth 39 pass. The breakthroughs 53 correspond to the shape of the stator teeth 39. The circuit board 44 has a bearing breakthrough 54 through which the roller bearing 47 passes. An element 55 of a control device for controlling the currents conducted through the coils 41 is arranged on the circuit board 44. Conduction paths 56 are connected to the element 55 of the control device. A bus connector 57 and contact breakthroughs 58 can also be seen. In this case, a plurality of conduction paths 56 are contacted on the first end face 51 of the circuit board 44 and a plurality of conduction paths 56 are contacted on the end face 52 opposite the first end face 51. As a result, the installation space of the circuit board is optimally utilized. The two conduction paths 56 represented on the left in the image plane of FIG. 8 are connected through by means of vias 56′ on the opposite end face 52, as can also be seen in FIG. 9.