Furniture drive for driving movable furniture part

Abstract

The invention relates to a furniture drive (1) for driving a movable furniture part (2), comprising: at least one electric motor (4); at least one actuator (7), preferably reciprocally movable between two end positions, for applying a force to the furniture part (2) to be driven; the invention relates to a motor drive (1), comprising an electric motor (4), an actuator (7), and a transmission (8) connected between the electric motor (4) and the actuator (7), characterized in that at least one belt (9), preferably a toothed belt, is provided, via which the electric motor (4), preferably a shaft (11) of the electric motor (4) or a belt reel (12) connected thereto, is connected to the transmission (8), the electric motor being designed as a disc motor (6) and / or an external rotor motor (5).

Description

Technical Field

[0001] The invention relates to a furniture drive device for driving a movable furniture part, the furniture drive device having at least one electric motor, at least one actuator for exerting a force on the furniture part to be driven, and a transmission device connected between the electric motor and the actuator, the actuator preferably being able to reciprocate between two end positions. Background Art

[0002] Such furniture drives with electric motors are known in the prior art. They enable, for example, the automatic opening of furniture parts. Typically, servomotors with relatively low rotational speeds are used here. The furniture drives are of relatively large design and, in the case of flap fittings, are attached to the flap fitting from the outside.

[0003] In recent years, efforts have been made to reduce the size of furniture drives so that they can be arranged concealed, in particular, in a wall of a piece of furniture.

[0004] This requires, on the one hand, a furniture drive of flat construction and an electric motor adapted thereto.

[0005] On the other hand, when integrated into the wall, the sound can be better propagated. In the worst case, the furniture body acts as a resonator. Summary of the invention

[0006] The object of the invention is to reduce the acoustic transmission of noise caused by an electric motor, wherein the furniture drive is of flat design.

[0007] This object is achieved by the features of claims 1 and 15 .

[0008] According to the invention, at least one belt, preferably a toothed belt, is provided, via which the electric motor is connected to the transmission. According to the invention, the electric motor is designed as a disk motor and / or an external rotor motor.

[0009] The belt preferably takes off the torque of the disk motor between coils and / or poles arranged on the stator or rotor and / or at a central shaft preferably mounted on the stator or rotor, wherein preferably it is provided that the shaft has a smaller diameter than the stator and / or rotor.

[0010] Preferably, the belt takes off the torque of the external rotor electric machine, preferably directly and / or on the circumference, outside the rotor in order to transmit the torque to the first gear stage.

[0011] By using a belt, the transmission of sound from the electric motor to the transmission is reduced even at high rotational speeds. The belt can additionally function as a first transmission stage.

[0012] Particularly preferably, the first gear stage, preferably all gear stages, are oriented eccentrically relative to the stator and / or the rotor and / or the central shaft and / or the motor axis.

[0013] The disk motor and / or the external rotor motor can be designed to be particularly flat, thereby making it possible to realize a particularly flat furniture drive.

[0014] Since the coils and the magnetic poles can be arranged relatively far outside in the case of disk motors and / or external rotor motors, the ratio between torque and rotational speed is relatively large.

[0015] In a disk motor, at least one rotor and at least one stator are arranged at least partially axially offset from one another, such as two axially offset disks.

[0016] In an external rotor electric machine, the stator is arranged at least partially radially within the rotor.

[0017] In particular, in the case of disk motors and / or external rotor motors, high rotational speeds may have to be operated, so that, in particular in the case of these motor types, it is of great importance to reduce the transmission of sound from the electric motor to the transmission.

[0018] Preferably, the shaft of the electric motor or a belt pulley connected thereto is connected to the transmission via at least one belt.

[0019] Alternatively, the belt may bear against the outer diameter of the electric motor, in particular against the outer diameter of the rotor of the electric motor.

[0020] According to a preferred embodiment, at least one electric motor is designed as a brushless motor, in particular an EC motor with at least one electronic control unit for field commutation. The advantage of brushless motors is that they are quieter and require less maintenance than brushed motors.

[0021] A brushless motor is understood to be a motor that does not transfer current to the rotor of the motor. Typically, only passive elements, such as permanent magnets, are arranged on the rotor. Current-carrying elements, such as coils, are arranged on the stator. The magnetic field is typically commutated by means of an electronic control unit (EC motor).

[0022] The abbreviation "EC" in the term "EC motor" means "electronically commuted", which involves electronically controlled commutation of the magnetic field.

[0023] In a preferred embodiment, the width of the electric motor can be less than 16 mm, preferably less than 10 mm, particularly preferably less than or equal to 8 mm. The electric motor is thus designed to be particularly flat.

[0024] The “width” refers in particular to the total width of the electric motor together with any shafts present for the drive output. The electric motor is therefore generally flat in design and can preferably be completely accommodated in a flat housing.

[0025] It can be provided that the electric motor has a diameter of less than 80 millimeters, preferably less than 50 millimeters, particularly preferably less than or equal to 40 millimeters.

[0026] The electric motor may have a holding torque and / or a maximum torque of less than or equal to 0.3 Newton meters, preferably when a voltage of less than or equal to 50 volts is applied.

[0027] In a preferred embodiment of the external rotor motor, the external rotor motor is designed as a radial flux motor. In this case, the magnetic field is oriented in the radial direction.

[0028] The external rotor motor can have a rotor with poles, preferably with at least 6 poles, particularly preferably with exactly 14 poles. However, fewer or more poles are also conceivable.

[0029] The rotor is preferably annular in shape, with the magnetic poles being arranged with alternating polarity on the inside of the ring.

[0030] The plurality of magnetic poles can be formed as differently magnetized regions of an especially annular component. Alternatively, the magnetic poles can be formed as separate components and can be arranged especially in an annular manner.

[0031] The external rotor motor can have a stator with coils, preferably with at least 9 coils, particularly preferably with exactly 12 coils. However, fewer or more coils are also conceivable.

[0032] The stator preferably has a star-shaped coil core, wherein a coil winding is respectively arranged around the individual arms of the star-shaped coil core, thereby realizing the coil.

[0033] If the current-carrying coils are arranged exclusively in the stator, the electric motor can be designed as brushless.

[0034] In a preferred embodiment, the disk motor is configured as an axial flux motor. Therefore, the magnetic flux is oriented in the axial direction.

[0035] The disk motor can have a rotor with poles, preferably with at least 4 poles, particularly preferably with exactly 8 poles. However, fewer or more poles are also conceivable.

[0036] The rotor can be embodied in the form of a disk, wherein the magnetic poles are arranged on one side of the disk.

[0037] The disk motor can have a stator with coils, preferably with at least 3 coils, particularly preferably with exactly 6 coils. However, fewer or more coils are also conceivable.

[0038] The stator can be shaped like a disk. The stator can also surround the rotor on both sides. A preferably coreless coil is arranged on the stator. In addition, the coil can be associated with a flux conducting element, preferably made of sintered material, by which the magnetic flux can be conducted.

[0039] In a preferred embodiment, in particular a preferred embodiment of a disk motor, the belt and the motor can be arranged substantially in the same plane. Therefore, the belt does not additionally increase the width of the furniture drive.

[0040] Inside the motor, the belt can or can be placed against the shaft or a belt reel connected to the shaft. In particular, the shaft does not have to extend beyond the width of the motor.

[0041] The belt can be arranged or can be arranged partially in a gap between at least two coils and / or poles arranged on the stator of an electric motor, in particular in the form of a disk motor.

[0042] Preferably, the first belt run is arranged in a first intermediate space, and the second belt run is arranged in a second intermediate space different from the first intermediate space. Thus, at least one coil and / or at least one magnetic pole can be arranged between the first belt run and the second belt run.

[0043] The belt can thus be guided out from the interior of the motor.

[0044] In a preferred embodiment, it is provided that the rotation axis of the electric motor is oriented substantially parallel to the rotation axis of at least one element, preferably all elements of the transmission. Thus, an electric motor which is designed flat in the direction of the rotation axis does not widen the furniture drive.

[0045] It can be provided that the belt is at least partially made of a sound-absorbing material, preferably wherein the sound-absorbing material of the belt is rubber, raw rubber, plastic or an open-cell foam material or a closed-cell foam material, preferably a polyurethane elastomer, raw rubber foam, silicone foam, EVA foam or PE foam and / or neoprene. Thus, the sound transmission from the electric motor to the transmission is reduced.

[0046] The sound-damping material, in particular neoprene, can be provided with glass-fiber tension threads and special fabrics in order to reduce noise and avoid soiling rubber wear.

[0047] Preferably, the furniture drive can have at least one housing, in which the transmission and the electric motor can be arranged.

[0048] It can be provided that the furniture drive has at least one bearing device, by means of which the electric motor is supported in the housing and / or on the housing, wherein at least one bearing device comprises at least one damping element made of a sound-absorbing material. Thus, the transmission of sound from the electric motor to the housing is also reduced.

[0049] It is preferably provided here that at least one bearing device has at least one bearing element which is connected to the electric motor, wherein the bearing element is preferably designed as a steel shaft, a rivet or a pin.

[0050] At least one first damping element and at least one second damping element may be arranged on the support, wherein the first damping element is arranged such that it reduces the propagation of sound between the electric motor and the housing in a first spatial direction, and the second damping element is arranged such that it reduces the propagation of sound between the electric motor and the housing in a second spatial direction transverse to the first spatial direction. It may be provided that the first and / or second damping element is designed as a damping disk or a damping sleeve.

[0051] In particular, more than one, preferably three, bearing devices may be provided, by means of which the electric motor is supported in and / or on the housing.

[0052] In a preferred embodiment, at least one transmission device is provided, by means of which the transmission device is connected to the actuator. The transmission device preferably comprises at least one rod.

[0053] In one embodiment, the electric motor and the transmission are arranged in a first housing, and the actuator is arranged in a second housing which is structurally separate from the first housing. It is preferably provided that the two housings are arranged essentially one above the other in a common plane in the coupled state. This does not increase the width of the furniture drive.

[0054] At least one lever assembly can be provided, via which the actuator is connected to the housing in a pivotable manner.

[0055] At least one mechanical force accumulator can be provided, with the aid of which a force can be exerted on the actuator for compensating for the weight of the furniture part to be driven.

[0056] In the first end position, the actuator can be arranged substantially completely in the housing.

[0057] It is preferably provided that the housing has a maximum width of less than 18 mm, preferably less than 16 mm.

[0058] A piece of furniture according to the invention, preferably a top cabinet, comprises at least one movable furniture part, preferably in the form of a flap that can be opened upwards, and at least one furniture drive according to any of the preceding claims, wherein the furniture part is movably mounted on the furniture via the at least one furniture drive.

[0059] In a preferred embodiment, the piece of furniture comprises at least one wall, wherein the housing of at least one furniture drive is substantially completely inserted into a recess in the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Further details and embodiments are shown in the accompanying drawings. Here, it is shown:

[0061] Figure 1 , Figure 2 In stereogram ( Figure 1 ) and exploded view ( Figure 2 ) shows a piece of furniture according to an embodiment,

[0062] Figure 3 A furniture drive according to one exemplary embodiment is shown in a top view from one side, without the housing cover,

[0063] Figure 4a , Figure 4b The housing with the transmission and the electric motor is shown in a perspective view and a side view without the housing cover.

[0064] Figure 5 The housing cover with the transmission and the electric motor is shown in a perspective view.

[0065] Figure 6 The housing with the transmission and the electric motor is shown in an exploded view.

[0066] Figure 7 The housing for the transmission and the electric motor is shown in the closed state.

[0067] Figure 8a , Figure 8b The transmission and the electric motor are shown in a side view, covered and in perspective,

[0068] Figure 9a , Figure 9b The transmission and the electric motor are shown in an alternative side view, covered and in perspective,

[0069] Fig.10a , Fig.10b The housing without the housing cover with the gear mechanism and the electric motor with the worm is shown in a perspective view and a perspective detail view.

[0070] Fig.11a , Fig.11bThe housing without the housing cover with the gear and the electric motor with the worm is shown in a side view and in a detailed view.

[0071] Fig.12a A perspective view showing a disc motor,

[0072] Figure 12b An exploded view of the disc motor is shown,

[0073] Fig.13 shows a disc motor with belts lying in the same plane,

[0074] Fig.14a , Fig.14b shows a perspective view and a side view of an external rotor motor,

[0075] Fig.15 shows an exploded view of an outer rotor motor, and

[0076] Figures 16a to 16c A cross-sectional view, a top view and a side view of an outer rotor electric machine are shown. DETAILED DESCRIPTION

[0077] Figure 1 and Figure 2 A piece of furniture 25 in the form of a top cabinet is shown, which comprises a movable furniture part 2 in the form of a flap that can be opened upwards, and a furniture drive 1 , wherein the furniture part 2 is movably mounted on the piece of furniture 25 via the furniture drive 1 .

[0078] The furniture part 2 can be pivoted about a horizontal axis 31 .

[0079] The piece of furniture 25 can, as in the illustrated case, comprise a rear wall 28 , an upper base 29 and a lower base 30 .

[0080] The piece of furniture 25 can comprise a wall 26 , wherein the housings 3 , 21 of the furniture drive 1 are each substantially completely inserted into a recess 27 in the wall 26 .

[0081] The maximum width 24 of the housing 3 , 21 is preferably less than 18 mm, more preferably less than 16 mm.

[0082] exist Figure 2 An electric motor 4 is arranged in a housing 3, which is only schematically shown in FIG. An actuator 7 is arranged on the housing 21, in particular in a pivotable manner, which is connected to the furniture part 2 or can be connected to the furniture part 2.

[0083] Not all furniture drives 1 have to be equipped with an electric drive unit. In the case shown, only one of the furniture drives 1 has an electric drive unit.

[0084] Alternative designs of furniture are conceivable in which the furniture drive device 1 according to the invention is used.

[0085] Figure 3 A furniture drive device 1 for driving a movable furniture part 2 is shown, which comprises at least one electric motor 4, at least one actuator 7 for exerting a force on the furniture part 2 to be driven, and a transmission device 8 connected between the electric motor 4 and the actuator 7, which actuator can preferably be moved back and forth between two end positions.

[0086] At least one belt 9, preferably a toothed belt, is provided, via which the motor 4, preferably the shaft 11 of the motor 4 or a belt pulley 12 connected thereto, is connected to the transmission 8. The belt 9 is connected in particular to a second belt pulley 10 of the transmission 8.

[0087] The belt 9 can be tensioned by means of a preferably pivotable belt tensioner 13 which engages in the belt 9 , for example, by means of rollers.

[0088] Alternatively or additionally, the electric motor 4 can be mounted in a displaceable manner, whereby the belt 9 can be tensioned by a movement of the electric motor 4 .

[0089] The electric motor 4 is designed as a disk motor 45 and / or as an external rotor motor 46 .

[0090] As shown, the electric motor 4 and the transmission 8 can be arranged in the first housing 3, and the actuator 7 can be arranged in a second housing 21 which is structurally separated from the first housing 3, preferably wherein the two housings 3, 21 are arranged one above the other in a common plane in the coupled state.

[0091] At least one transmission device 20 is provided, by means of which the gear mechanism 8 is connected to the actuator 7, wherein the transmission device 20 comprises at least one rod. Alternative designs of the transmission device 20 are also conceivable. The transmission device 20 is coupled to the gear mechanism 8 in particular via a non-circular element 19.

[0092] At least one rod assembly 22 is provided, by which the actuator 7 is connected in a pivotable manner to the housing 21. In the concrete case, the rod assembly 22 forms a 7-joint assembly.

[0093] At least one mechanical force accumulator 23 is provided, with which a force for compensating the weight of the furniture part 2 to be driven can be exerted on the actuator 7. The mechanical force accumulator 23 can have one or more compression springs 34.

[0094] In order to transmit the force stored in the mechanical force accumulator 23 to the actuator 7 , a force transmission rod 35 may be provided.

[0095] Furthermore, a force adjustment device 33 can be provided, which can preferably be actuated from the end side of the housing 21 and by means of which the spring prestressing of the spring 34 can be adjusted.

[0096] In a first end position, which corresponds to the closed position of the furniture part 2 , the actuator 7 is arranged substantially completely in the housing 21 .

[0097] The transmission 8 comprises a plurality of transmission stages 32 , in which overload clutches and / or overrunning clutches may also be integrated. The transmission stages 32 may be realized by gear wheels 18 of different sizes.

[0098] Figure 4a The electric drive unit is shown in a perspective view with a housing 3 , a transmission 8 and an electric motor 4 , without the housing cover. Figure 4b A corresponding side view is shown.

[0099] The rotation axis of the electric motor 4 is oriented substantially parallel to the rotation axis of at least one element, preferably all elements, of the gear 8, in particular the gear wheel 18. The electric motor 4, which is designed to be flat in the axial direction, requires very little space in this installation position over the width of the furniture drive 1 and thus allows a flat furniture drive 1 to be realized.

[0100] and Figure 4a and Figure 4b compared to, Figure 5 The housing 3 is shown from the other side. Figure 4a and Figure 4b The missing parts, as well as the transmission 8 and the electric motor 4 are not shown.

[0101] Figure 6 The housing 3 , the transmission 8 and the electric motor 4 are shown in an exploded view.

[0102] Figure 7 A closed housing 3 is shown.

[0103] Figures 8a to 9b The transmission 8 and the electric motor 4 are shown, but the housing 3 is not shown. Figure 8a and Figure 8b The transmission 8 and the electric motor 8 are shown from a first side, Figure 9a and Figure 9b The transmission and the electric motor 8 are shown from the second side.

[0104] Figure 8b and Figure 9b The transmission gear 18 is shown without obstructions, from which the design of the transmission stage 32 can be seen.

[0105] The transmission 8 reduces the rotational speed. Due to the high rotational speed, the fastest rotating component, namely the electric motor 4, is the noisiest and should be decoupled.

[0106] The sound transmission to the transmission 8 is reduced in that the first transmission stage is implemented by means of the belt 9. The belt 9 can be made at least partially of a sound-absorbing material, preferably wherein the sound-absorbing material of the belt 9 is rubber, caoutchouc, plastic or an open-cell foam material or a closed-cell foam material, preferably a polyurethane elastomer, caoutchouc foam, silicone foam, EVA foam or PE foam and / or neoprene.

[0107] The sound transmission to the housing 3 can be reduced in that the furniture drive has at least one bearing device, via which the electric motor 4 is supported in the housing 3 and / or on the housing 3, wherein the at least one bearing device can include at least one buffer element made of a sound-absorbing material.

[0108] Figures 10a to 11b An embodiment not in accordance with the invention is shown, in which the first transmission stage is realized by means of a worm 38 . A disadvantage of this embodiment is that the sound of the electric motor 4 can be easily transmitted to the worm 38 .

[0109] exist Figures 10a to 11b In this embodiment, the rotation axis of the electric motor 4 is not oriented parallel to the rotation axis of the elements of the transmission 8. If the furniture drive 1 is to be designed to be flat, the electric motor 4 must have a very small diameter.

[0110] Fig.12a and Figure 12b An embodiment of a flat disk motor 6 according to the invention is shown. The rotor 39 and the stator 40 are substantially disk-shaped and are arranged axially offset from one another.

[0111] If Figure 12b As can be seen from the exploded view in FIG, eight magnetic poles 17 are arranged on the rotor 39. However, other numbers of magnetic poles 17 are also conceivable.

[0112] A coil carrier 43 is provided on the stator 40 , wherein six coils 16 are arranged on the coil carrier 43 . However, a different number of coils 16 is also conceivable.

[0113] In this exemplary embodiment, the coil 16 is designed to be coreless.

[0114] At each coil 16, a flux conductor 42 is arranged in an axially offset manner. The flux conductor 42 substantially has the shape of a perforated disk segment.

[0115] The flux conductor 42 is made of a sintered material.

[0116] The flux conductor 42 is used to conduct magnetic flux.

[0117] The coil cover 41 is arranged above the coil 16 and the flux conductor 42 , wherein preferably each pair of coil, flux conductor is provided with its own coil cover 41 .

[0118] The disk motor 6 is designed as an axial flux motor. Due to the arrangement of the coils 16 , the magnetic flux thus extends in the direction of the rotation axis of the disk motor 6 .

[0119] Since only passive poles 17 are arranged on rotor 39 , disk motor 6 can be designed as a brushless motor. Preferably, disk motor 6 is designed as an EC motor (EC means “electronically commutated”) having an electronic control unit for commutating the magnetic field.

[0120] The rotor 39 and the stator 40 are connected to each other via a bearing 37 .

[0121] The shaft 11 can be Figures 3 to 8b As in the embodiment of the present invention, the belt 9 protrudes axially from the rotor 39 and / or the stator 40, via which the drive output is carried out and on which, for example, the belt reel 12 is arranged. Therefore, the belt 9 must be arranged axially offset relative to the motor 4. The disadvantage of this embodiment is that the belt 9 affects the minimum width of the furniture drive 1.

[0122] exist Fig.13 In the embodiment of FIG. 4 , the belt 9 and the motor 4 are arranged substantially in the same plane.

[0123] In particular, the belt 9 rests or can rest within the electric motor 4 on the shaft 11 or on a belt reel 12 connected thereto.

[0124] The belt 9 is arranged partially in the intermediate space between at least two coils 16 arranged on the stator 40 of the electric motor 4 designed as a disk motor 6. The belt 9 can thus be guided from the interior of the electric motor 4 to the outside to the second belt reel 10.

[0125] In particular, a first run of the belt 9 is arranged in a first intermediate space, and a second run of the belt 9 is arranged in a second intermediate space different from the first intermediate space. Thus, the coil 16 is arranged between the two run sections, in particular together with the coil cover 41 .

[0126] Fig.14a and Fig.14b An external rotor electric machine 5 according to the invention is shown.

[0127] The external rotor motor 5 comprises a rotor 39 having 14 magnetic poles 17. However, a different number of magnetic poles 17 is also conceivable.

[0128] The rotor 39 is in particular annular in design, wherein the magnetic poles 17 are arranged with alternating polarity on the inner side of the ring. In particular, the magnetic poles 17 are designed as alternatingly magnetized regions of the ring.

[0129] The external rotor motor 5 further comprises a stator 40 having twelve coils 16. However, a different number of coils 16 is also conceivable.

[0130] The stator 40 has a star-shaped coil core 15 , wherein a coil winding 14 is arranged around each of the arms of the star-shaped coil core 15 , thereby forming a coil 16 .

[0131] Due to the orientation of the coils, the outer rotor motor 5 is designed as a radial flux motor.

[0132] Since only passive poles 17 are arranged on the rotor 39, the outer rotor motor 5 can be designed as a brushless motor. Preferably, the disk motor 6 is designed as an EC motor (EC means "electronically commutated") having an electronic control unit for commutating the magnetic field.

[0133] The coil 16 is actuated via a power and signal line 36 . Furthermore, sensors such as Hall sensors can be provided in the electric motor 4 , for example in order to determine the position of the rotor 39 .

[0134] Fig.15 The outer rotor motor 5 is shown in an exploded view. The coil winding 14 is shown removed from the coil core 15 .

[0135] The rotor 39 is connected to the shaft 11 in a rotationally fixed manner via a pressed-in ring 44 , wherein the drive output occurs via the shaft 11 .

[0136] Figures 16a to 16c 4 shows a cross-sectional view and a top view of the outer rotor motor 6. Fig.16a ) the coil winding 14 and the coil core 15 can be seen.

[0137] Motor 4, especially Figures 12a to 13 The disc motor 6 shown in Figures 14a to 16c The outer rotor motor 5 shown in FIG. 5 may have the following characteristics:

[0138] - a width of less than 16 mm, preferably less than 10 mm, particularly preferably less than or equal to 8 mm, and / or

[0139] - a diameter of less than 80 mm, preferably less than 50 mm, particularly preferably less than or equal to 40 mm, and / or

[0140] Preferably, when a voltage of less than or equal to 50 Volts is applied, the holding torque and / or the maximum torque is less than or equal to 0.3 Newton meters.

[0141] Reference numerals list

[0142] 1 Furniture drive

[0143] 2 Furniture components

[0144] 3 Housing

[0145] 4 Electric motor

[0146] 5. External rotor motor

[0147] 6 Disc motor

[0148] 7 Actuator

[0149] 8 Transmission

[0150] 9 belt

[0151] 10 Second reel

[0152] 11 Axis

[0153] 12 Reel

[0154] 13 Belt tensioner

[0155] 14 Coil winding

[0156] 15 Coil core

[0157] 16 Coil

[0158] 17 Magnetic Pole

[0159] 18 Transmission gear

[0160] 19 Non-circular parts

[0161] 20 Delivery Equipment

[0162] 21 Shell

[0163] 22 Rod Assembly

[0164] 23 Mechanical accumulator

[0165] 24 Maximum width

[0166] 25 Furniture

[0167] 26 wall

[0168] 27 recess

[0169] 28 Back wall

[0170] 29 Upper bottom

[0171] 30 bottom

[0172] 31 Horizontal axis

[0173] 32 gear stages

[0174] 33 Force adjustment equipment

[0175] 34 Compression spring

[0176] 35 Force transfer rod

[0177] 36 Power and signal conductors

[0178] 37 Bearings

[0179] 38 Worm

[0180] 39 Rotor

[0181] 40 Stator

[0182] 41 Coil Cover

[0183] 42 Flux Conductors

[0184] 43 Coil carrier

[0185] 44 rings

Claims

1. A furniture drive device (1) for driving a movable furniture part (2), the furniture drive device comprising: - at least one electric motor (4), at least one actuator (7) which is preferably movable back and forth between two end positions for exerting a force on the furniture part (2) to be driven, and - a transmission device (8) connected between the electric motor (4) and the actuator (7), It is characterized in that At least one belt (9), preferably a toothed belt, is provided, via which the electric motor (4), preferably a shaft (11) of the electric motor (4) or a belt pulley (12) connected to the shaft, is connected to the transmission (8), wherein the electric motor is designed as a disk motor (6) and / or an external rotor motor (5).

2. The furniture drive device (1) according to claim 1, wherein: The at least one electric motor (4) is designed as a brushless motor, in particular as an EC motor having at least one electronic control unit for field commutation.

3. The furniture drive device (1) according to any one of the preceding claims, wherein: The electric motor (4) - has a width of less than 16 mm, preferably less than 10 mm, particularly preferably less than or equal to 8 mm, and / or - has a diameter of less than 80 mm, preferably less than 50 mm, particularly preferably less than or equal to 40 mm, and / or Preferably, when a voltage of less than or equal to 50 Volts is applied, the holding torque and / or the maximum torque is less than or equal to 0.3 Newton meters.

4. The furniture drive device (1) according to any one of the preceding claims, wherein: The outer rotor motor (5) - constructed as a radial flux motor, and / or - having a rotor (39) having magnetic poles (17), preferably at least 6 magnetic poles, particularly preferably exactly 14 magnetic poles, and / or A stator (40) has coils (16), preferably at least 9 coils, particularly preferably exactly 12 coils.

5. The furniture drive device (1) according to any one of the preceding claims, wherein: The disc motor (6) - constructed as an axial flux machine, and / or - having a rotor (39) having magnetic poles (17), preferably at least 4 magnetic poles, particularly preferably exactly 8 magnetic poles, and / or A stator (40) has coils (16), preferably at least 3 coils, particularly preferably exactly 6 coils.

6. The furniture drive (1) according to any one of the preceding claims, wherein - the belt (9) and the motor (4) are arranged substantially in the same plane, and / or - the belt (9) rests or can rest inside the electric motor (4) on the shaft (11) or on a belt reel (12) connected to the shaft, and / or The belt (9) is arranged or can be arranged partially in the intermediate space between at least two coils (16) and / or poles (17) arranged on the stator (40) of the electric motor (4), the electric motor being in particular designed as a disk motor, preferably wherein: A first run of the belt (9) is arranged or can be arranged in a first intermediate space, and a second run of the belt (9) is arranged or can be arranged in a second intermediate space different from the first intermediate space.

7. The furniture drive device (1) according to any one of the preceding claims, wherein: The rotation axis of the electric motor (4) is oriented substantially parallel to the rotation axes of at least one element, preferably all elements, of the transmission (8).

8. The furniture drive (1) according to any one of the preceding claims, wherein: The belt (9) is at least partially made of a sound-absorbing material, preferably wherein: The sound-absorbing material of the belt (9) is rubber, raw rubber, plastic or open-cell foam material or closed-cell foam material, preferably polyurethane elastomer, raw rubber foam, silicone foam, EVA foam or PE foam and / or chloroprene rubber.

9. The furniture drive (1) according to any one of the preceding claims, wherein: The furniture drive (1) has at least one housing.

10. The furniture drive device (1) according to claim 9, wherein: The furniture drive has at least one bearing device, by which the electric motor (4) is supported in the housing (3, 21) and / or on the housing (3, 21), wherein the at least one bearing device comprises at least one buffer element made of a sound-absorbing material, preferably wherein the at least one bearing device has at least one bearing part connected to the electric motor (4), preferably wherein the bearing part is designed as a steel shaft, a rivet or a pin.

11. The furniture drive (1) according to any one of the preceding claims, wherein: At least one transmission device (20) is provided, by means of which the transmission device (8) is connected to the actuator (7), wherein the transmission device (20) preferably comprises at least one rod.

12. The furniture drive (1) according to any one of the preceding claims, wherein: The electric motor (4) and the transmission (8) are arranged in a first housing (3), and the actuator (7) is arranged in a second housing (21) which is structurally separated from the first housing (3), preferably wherein the two housings (3, 21) are arranged substantially one above the other in a common plane in a coupled state.

13. The furniture drive (1) according to claim 1, wherein - at least one rod assembly (22) is provided, through which the actuator (7) is connected to the housing (21) in a pivotable manner, and / or - at least one mechanical force accumulator (23) is provided, by means of which a force for compensating for the weight of the furniture part (2) to be driven can be applied to the actuator (7), and / or The actuator (7) is arranged substantially completely in the housing (21) in the first end position.

14. The furniture drive (1) according to any one of the preceding claims, wherein: The housing (3, 21) has a maximum width (24) of less than 18 mm, preferably less than 16 mm.

15. A piece of furniture (25), preferably a top cabinet, comprising at least one movable furniture component (2) and at least one furniture drive device (1) according to any one of the preceding claims, wherein the furniture component is preferably in the form of a flap that can be opened upwards, wherein: The furniture part (2) is movably mounted on the piece of furniture (25) via the at least one furniture drive (1).

16. The piece of furniture (25) according to claim 15, wherein: The piece of furniture (25) comprises at least one wall (26), wherein a housing (3, 21) of the at least one furniture drive (1) is substantially completely inserted into a recess (27) in the wall (26).

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