Pivoting door with a drive and method for pivoting a door leaf of a pivoting door

Abstract

The invention relates to a drive unit (5) for a swing-leaf door (1), comprising: an electric motor (6), in particular a servomotor (6a), having a motor shaft for pivoting a door leaf (3) relative to a door frame (2); a control / adjustment unit (9) that is configured to move the door leaf (3) into a target angular position (α1, α2) by controlling and / or adjusting the electric motor (6); and an electrically actuatable brake (7), the brake (7) being configured, when substantially electrically deenergized, to preferably frictionally generate a holding braking moment (Mhold) and impart same to the door leaf (3) in order to hold the door leaf (3) in the target angular position (α1, α2) when a disturbance torque acts on the door leaf (3), and, when electrically energized, to generate a release braking moment (Mrelease), which is reduced in relation to the holding braking moment (Mhold), and impart same to the door leaf (3). The invention furthermore relates to a method for pivoting a door leaf (3) of a swing-leaf door (1).

Description

[0001] The invention relates to a hinged door comprising: a door frame; at least one door leaf; a drive unit comprising: an electric motor, in particular a servo motor, with a motor shaft for pivoting the door leaf relative to the door frame; a control unit designed to bring the door leaf into a desired angular position by controlling and / or regulating the electric motor; and an electrically actuated brake; a transmission element, in particular a sliding rod, for transmitting a rotary motion from the drive unit to the door leaf or the door frame.

[0002] Furthermore, the invention relates to a method for pivoting a door leaf of a hinged door.

[0003] Electric drive units for swing doors are used to open and close swing doors electrically. To open or close, the electric motor of the drive unit moves the door leaf to a predetermined angle, allowing people to pass through. However, external influences, such as drafts or unintentional force applied by people, can change the angle of the door leaf.

[0004] It is known from the prior art to continuously regulate the angular position of a door leaf using an electric motor so that the door leaf remains in the desired angular position. However, a disadvantage of this method is that the electric motor must constantly compensate for any small differences between the desired angular position and the current angular position, which can be caused by drafts or other forces. This results in increased energy consumption and additional noise pollution, especially in sensitive areas such as hospitals, nursing homes, and libraries.

[0005] Furthermore, it is known from the prior art to fix a door leaf in the desired angular position by means of a brake.

[0006] This is shown, for example, in US 3,470,653 A and US 7,310,911 B1. When the desired angular position of the door leaf is reached, the brake is energized, thus fixing the door leaf in place. To hold the door leaf in the desired angular position for an extended period, a continuous power supply to the brake is necessary, which increases energy consumption.

[0007] In light of these considerations, the object of the present invention is therefore to at least partially mitigate or even completely eliminate the disadvantages of the prior art. Preferably, the object of the present invention is to hold a door leaf in a desired angular position with low energy consumption and low noise emissions.

[0008] EP 3 361 027 A1 discloses a holding device for a door leaf. The movement of the leaf charges an energy storage device of the holding device.

[0009] Document DE 10 2004 004 526 A1 discloses a fire protection drive for an opening closure. The opening closure can be designed as a gate. A brake slows the gate without power (fail-safe brake).

[0010] US 6,634,140 B1, WO 99 / 32748 A1, EP 3 064 689 A1 and WO 2011 / 067001 A1 concern other swing doors and door drives.

[0011] This problem is solved by a swing door according to claim 1 and by a method according to claim 10. Preferred embodiments are specified in the dependent claims.

[0012] According to the invention, in a swing door of the type mentioned above, the brake is designed to generate a holding braking torque, preferably by friction, in a substantially de-energized state and to exert it on the door leaf in order to hold the door leaf in the desired angular position in the event of a disturbance torque acting on the door leaf, wherein the door leaf is held in the desired angular position by the holding braking torque until any disturbance torque acting on the door leaf exceeds the holding braking torque. wherein the brake is further configured to generate and exert on the door leaf a reduced release braking torque compared to the holding braking torque when energized, wherein the control unit is configured to switch the electrically actuated brake to the energized state when the electric motor is controlled and / or regulated to bring the door leaf into the target angular position, and wherein the control unit is further configured to switch the electrically actuated brake to the de-energized state when the door leaf is in the target angular position, wherein a non-self-locking angle gear is provided which is connected to the motor shaft on an input side and to the transmission element on an output side, wherein the drive unit is arranged in a receiving space of the door frame and the holding braking torque is in a range of 0.07 Nm to 2 Nm.In this way, the door leaf can be held in the desired angular position with very little or no electrical or energy consumption. The door leaf is preferably pivoted by the electric motor only when the brake is energized, since in this state the electric motor only has to work against the brake's release torque, which is preferably essentially 0 Nm. In the essentially de-energized state, the brake is preferably completely de-energized, so that no electrical current flows through the brake and there is no energy consumption by the brake. At the same time, the holding torque is generated by the brake. However, in one embodiment of the invention, it can also be provided that a quiescent current flows through the brake in the essentially de-energized state. Such a quiescent current is, however, many times lower than the electrical current that flows through the brake when energized.

[0013] For example, the quiescent current can be a few mA, for instance approximately 10 mA, while the current through the brake in the energized state is in the range between 0.1 A and 10 A, preferably between 0.1 A and 1 A or between 0.1 A and 0.5 A. In the essentially de-energized state, the brake is active and counteracts any disturbance torque acting on the door leaf, which can be caused, for example, by drafts or unintentional contact by people, so that the door leaf can be held in the desired angular position. In contrast to the present invention, known drive units with electrically actuated brakes require these to be energized in order to hold the door leaf in a desired angular position, resulting in a significantly higher current and energy consumption when these doors are to be held in a desired angular position.When energized, the brake according to the invention generates only the release braking torque, which is less than the holding braking torque and preferably corresponds to essentially 0 Nm, so that the door leaf can be pivoted by the electric motor. In the case of a release braking torque of 0 Nm, the door leaf is completely released by the brake.

[0014] Due to tolerances and friction in bearings, a frictional torque other than 0 Nm may also be present. It is important that the release braking torque is less than the holding braking torque. Holding braking torque and release braking torque are torques generated by the brake when a disturbance torque acts on the door leaf or the brake itself. If no disturbance torque is present, the brake does not generate any torque. The holding braking torque and release braking torque thus counteract any rotation of the door leaf, but do not induce any rotation on their own. If a disturbance torque acting on the door leaf exceeds the holding braking torque or the release braking torque, the door leaf will nevertheless rotate. The control unit switches the brake between the energized and essentially de-energized states.

[0015] The target angular position of the door leaf can be viewed relative to the door frame, with the counting direction depending on the opening direction of the swing door. In this disclosure, a door leaf angular position of 0° is assumed when the swing door is closed. However, the angular position of 0° can, in principle, be any value. When the swing door is open, the door leaf, according to this disclosure, is in an angular position other than 0°. The target angular position can be in a range from 0° to 360°, depending on the maximum opening width of the swing door. Typical swing doors have a limited opening width. In such a case, the target angular position of the door leaf might, for example, be in a range from 0° to 180° or from 0° to 130°. The target angular position at which the door leaf is to be positioned can be freely selected or adjustable.A preset target angle position can be stored in memory. For example, the target angle position can be selected or adjusted via a switch to open and / or close the swing door. In one example, pressing the switch sets the target angle of the door leaf to over 90°. In this position, the door leaf is held by the brake when de-energized. Pressing the switch again resets the target angle position to 0°. Of course, multiple target angle positions, such as 20°, 90°, and 170°, can also be provided. These target angle positions can be stored in the memory of the control unit and selected, for example, via a switch.It can also be provided that a detection sensor is configured to recognize people in the area in front of the swing door and subsequently adjust the target angular position accordingly, so that the swing door opens. The holding braking torque and the release braking torque can be transmitted directly or indirectly from the brake to the door leaf. For example, the brake can transmit the holding braking torque and the release braking torque to the door leaf via the motor shaft or a transmission element. The holding braking torque keeps the door leaf in the target angular position until a disturbance torque acting on the door leaf exceeds the holding braking torque. The holding braking torque can therefore also be referred to as a static braking torque because it keeps the door leaf at rest in the event of a disturbance torque, thus compensating for the disturbance torque. The electric motor is preferably a servo motor, in particular a brushless DC motor.A brushless DC motor is characterized by low noise levels and low maintenance requirements. The transmission element is preferably a sliding rod that can be connected to a guide rail on the door leaf.

[0016] Directional information in this disclosure refers to the intended operating condition of the drive unit in the swing door.

[0017] Preferably, the brake is an electrically controlled friction brake. Such a friction brake has an electrical winding configured to displace a slidably mounted pressure element with a first friction surface, preferably axially. The slidably mounted pressure element can press a rotatably mounted drive element with at least a second friction surface against a pressure part with a third friction surface, so that the drive element is clamped between the pressure part and the pressure element, generating the holding braking torque. In the de-energized state, the slidably mounted pressure part is pressed against the drive element by a spring preload, preferably adjustable by means of one or more adjusting screws, which in turn presses the drive element against the pressure part. The spring preload can be generated by an adjustable spring.The drive element can be connected to the motor shaft, allowing the holding braking torque to be transferred to the motor shaft. Energizing the electrical winding overcomes the spring force, so the pressure element exerts little or no force on the drive element. When the brake is energized, the drive element can essentially rotate freely.

[0018] Alternatively, the brake can be designed as a positive-locking brake, in particular as a tooth-holding brake.

[0019] In a particularly preferred embodiment, the release braking torque is essentially 0 Nm, so that the door leaf is completely released from the brake when energized. This allows the door leaf to be pivoted by the brake without resistance when the brake is energized. The release braking torque is less than 0.05 Nm, measured at the motor shaft, preferably less than 0.03 Nm, and particularly less than 0.01 Nm.

[0020] In order to keep the door leaf in the desired angle position on the one hand, but on the other hand to allow the swing door to be opened in the event of a power failure, the holding braking torque is designed to be in the range of 0.07 Nm to 2 Nm.

[0021] Preferably, the holding braking torque is in a range of 0.08 Nm to 1 Nm or 0.08 Nm to 0.85 Nm.

[0022] The holding brake torque is measured at the motor shaft. The holding brake torque is preferably adjustable, for example by means of adjusting screws.

[0023] Special standards and regulations apply to escape routes and emergency exit doors in buildings. Escape routes and emergency exit doors must not pose any obstacles to people in the event of a fire and must therefore be easily opened. When de-energized, the holding brake torque is applied, which, measured at the motor shaft, preferably has a maximum torque of 0.85 Nm. As already described, the holding brake torque can be adjustable, in particular by means of one or more adjusting screws that modify a spring force generating the holding brake torque. The adjustability of the holding brake torque can be limited, at least upwards, for example, to a maximum of 0.85 Nm. The holding brake torque serves to keep the door leaf in a position. However, such a holding brake torque can be overcome by people in the event of a fire or power failure without excessive force by pushing the door open.Thus, a door equipped with the drive unit according to the invention does not pose an obstacle for fleeing persons.

[0024] To reduce resistance when pivoting the door leaf, the control unit is configured to switch the electrically actuated brake to the energized state when the electric motor is controlled and / or regulated to move the door leaf into the desired angular position. Therefore, before the door leaf is pivoted by the electric motor in this embodiment, the brake is switched to the energized state so that it only transmits the release braking torque to the door leaf, which, as described above, is preferably essentially 0 Nm.

[0025] To hold the door leaf in the desired angular position, the control unit must be configured to switch the electrically actuated brake to a substantially de-energized state when the door leaf is in the desired angular position. In this embodiment, after the door leaf has pivoted, the brake is switched to a substantially de-energized state so that it can transmit the holding braking torque to the door leaf.

[0026] A particularly preferred embodiment is achieved when the brake, preferably a friction surface, and in particular a friction lining, is in preferably direct contact with a drive element connected to the motor shaft when de-energized. For this purpose, the brake can, for example, be arranged on or adjacent to the electric motor. The drive element is non-rotatably connected to the motor shaft and can be received in a gap in the brake. The brake can brake or hold the drive element when de-energized, thus generating the holding braking torque and transmitting it via the motor shaft. In a particularly preferred embodiment, the brake is flanged to a non-drive side of the electric motor. The motor shaft also extends from the electric motor housing on the non-drive side.The non-drive side of the electric motor faces a drive side, which is connected to the door leaf directly or indirectly, for example via a gearbox and / or transmission element. The motor shaft may be guided at least partially through the brake. However, it is also possible for the brake to be located on the drive side of the electric motor, in particular by flange mounting.

[0027] To translate the torque or speed of the electric motor, a bevel gear is provided, which is connected to the motor shaft at one input end and can be connected at one output end to a transmission element for transferring rotary motion to the door leaf. The gear is preferably arranged on the drive side of the electric motor, in particular flanged to it. The gear also translates the holding braking torque using the gear ratio. To accommodate tight installation spaces, the gear is designed as a bevel gear.

[0028] A right-angle gearbox can have an input side and an output side arranged at an angle other than 0°, for example, substantially 90° to each other. Inside the right-angle gearbox, bevel gears, for example, can be arranged to redirect the force. An input shaft on the input side can be connected to the motor shaft of the electric motor. An output shaft on the output side can be connected directly or indirectly to the door leaf via the transmission element.

[0029] To allow manual opening of the swing door in the event of a power outage, the gearbox is not self-locking. Preferably, the gearbox is neither dynamically nor statically self-locking on the output side. This non-self-locking design allows the gearbox to be driven from the output side, i.e., by pivoting the door leaf. Self-locking means that the motor or gearbox shaft stops immediately when the electric motor is no longer powered. Self-locking occurs when the helix angle is smaller than the friction angle.

[0030] In one embodiment, a mounting plate is provided to which the electric motor, gearbox, and / or brake are attached. Attachment can be achieved, for example, by screwing, riveting, gluing, or welding. The drive unit, including the mounting plate, preferably has a maximum length of 200 mm to 500 mm, a maximum width of 50 mm to 80 mm, and a maximum height of 50 mm to 90 mm.

[0031] To detect the position of the door leaf, it is advantageous to provide at least one sensor, for example a Hall sensor or a rotary encoder, with which the instantaneous angular position of the door leaf can be determined. This sensor can be integrated into the electric motor. Preferably, three Hall sensors are provided, arranged within the electric motor. However, a rotary encoder, particularly an incremental encoder, can also be used as the sensor. The rotary encoder can detect the position of the motor shaft or, if a gearbox is present, a gearbox shaft. The instantaneous angular position of the door leaf can be determined from the known geometry of the swing door. From the instantaneous position of the door leaf, other parameters, such as angular velocity and / or angular acceleration of the door leaf, can also be determined.

[0032] It is particularly preferred if the control unit is configured to regulate the door leaf to the target angular position based on its current angular position. For this purpose, a control loop can be provided that uses the target angular position as a reference variable and the current angular position as the feedback variable. The electrical current for the electric motor can serve as the manipulated variable. The control unit can also use derived variables, such as the angular velocity and / or angular acceleration of the door leaf.

[0033] The hinged door comprises a door frame, at least one door leaf, a drive unit of the type described, and a transmission element, in particular a sliding rod, for transmitting a rotary motion from the drive unit to the door leaf or the door frame. The drive unit is arranged in the door frame. The door frame is preferably made of metal, plastic, and / or wood. The door leaf can be hinged to the door frame. The door leaf is also preferably made of metal, plastic, and / or wood. In one embodiment, the door leaf can pivot at least 100° relative to the door frame.

[0034] To reduce noise and for aesthetic reasons, the drive unit is essentially completely enclosed within a recess in the door frame. This allows the electric motor, brake, control unit, and gearbox to be located within this recess. If a mounting plate is present, an opening in the recess can be shaped to match the plate, so that the mounting plate can close the insertion opening of the recess when the drive unit is installed.

[0035] The problem formulated above is also solved by a method for pivoting the door leaf of a swing door relative to a door frame. The method comprises the following steps: Switching an electrically operated brake into an energized state in which the brake generates and applies a reduced release braking torque to the door leaf compared to a holding braking torque; controlling and / or regulating an electric motor to bring the door leaf into a desired angular position;Switching the brake to a substantially de-energized state, in which the brake preferably generates the holding braking torque by friction and exerts it on the door leaf when the door leaf is in the target angular position, in order to hold the door leaf in the target angular position in the event of a disturbance torque acting on the door leaf, wherein the door leaf is held in the target angular position by the holding braking torque until any disturbance torque acting on the door leaf exceeds the holding braking torque, wherein a non-self-locking bevel gear is provided which is connected to the motor shaft on an input side and to the transmission element on an output side, wherein the drive unit is arranged in a receiving space of the door frame and the holding braking torque is in the range of 0.07 Nm to 2 Nm.

[0036] To bring the door leaf into a desired angular position, the steps can be performed in the specified sequence. Preferably, the steps are performed sequentially so that there is no overlap between the individual steps. While the electric motor is being controlled and / or regulated to bring the door leaf into a desired angular position, the brake is energized, so that it can only exert the release braking torque, which is preferably 0 Nm, on the door leaf. Once the electric motor has brought the door leaf into the desired angular position, the brake is switched to a substantially de-energized state to fix the door leaf in place. In the de-energized state, the brake can apply the holding braking torque to counteract any unwanted pivoting of the door leaf. Consequently, no further control and / or regulation of the electric motor is necessary to hold the door leaf in the desired angular position.For example, a target angle position of 60° to 120° can be specified for opening. For closing, a target angle position of 0° can be specified. The control unit can define the execution of each step. The brake can be activated and / or deactivated by the control unit.

[0037] The invention will be described below with reference to figures, to which it is not limited.

[0038] They show: Fig. 1 an open revolving door in a front view; Fig. 2 a section of a hinged door with a drive unit in a door frame in a top view; Fig. 3 another section of an open revolving door in a view from below; Fig. 4 a front view of a drive unit in a door frame, with the door frame cut open; Fig. 5 a cutaway door frame with a drive unit in side view; Fig. 6 a door frame with a drive unit in top view; Fig. 7 a partial exploded view of a drive unit on a swing door; Fig. 8 Procedure steps for pivoting a door leaf; Fig. 9A a friction brake in cross-section; Fig. 9B a spring of the friction brake; Fig. 9C the friction brake from the front; and Fig. 9D A schematic exploded view of the friction brake.

[0039] Fig. 1 Figure 1 shows a freestanding hinged door 1 in its uninstalled state, with a door frame 2 and a door leaf 3, which is articulated to the door frame 2 via two door hinges 4. The door frame 2 can also be referred to as a jamb. Fig. 1 The schematic diagram shows that the swing door 1 has a drive unit 5, which is essentially entirely located within the door frame 2 and with which the door leaf 3 can be moved to a target angular position α1 or α2 for opening and closing. The drive unit 5 is located in a receiving space 13 of the door frame 2. The target angular position α1 represents a closed state of the swing door 1 and corresponds to 0°. The target angular position α2 corresponds to an open state of the swing door 1 and can, for example, be 100°. The target angular positions α1 and α2 can be stored in a memory (not shown). By pressing a switch 50, for example, α1 or α2 can be selected as the target angular position, thereby opening or closing the swing door 1. Of course, further or other target angular positions can also be provided.The term α moment denotes the instantaneous angular position of the door leaf. M Stör denotes a disturbance torque acting on the door leaf 3. The disturbance torque M Stör can be caused, for example, by drafts or other forces.

[0040] Fig. 2 Figure 1 shows a section of the hinged door 1 with the drive unit 5 in the door frame 2 in an oblique view from above. The drive unit 5 comprises an electric motor 6, in particular a brushless motor serving as a servo motor 6a.

[0041] The diagram shows a DC motor, a brake 7, a control unit 9, and a gearbox 10. The electric motor 6 can, for example, have three phases / line conductors and be controlled and / or regulated accordingly by the control unit 9. A transmission element 8 is provided for transmitting the rotary motion of the electric motor 6. The brake 7 is flanged to the rear of the electric motor 6, which can also be referred to as the non-drive side of the electric motor 6. The brake 7 can apply a holding braking torque M, which will be described in more detail later, to the motor shaft 51 by frictional engagement (see [reference]). Fig. 4 The motor shaft 51 is at least partially guided into the brake 7. In the illustration shown, the motor shaft 51 passes through the brake 7. However, the motor shaft 51 can also terminate inside the brake 7. The drive unit 5 with mounting plate 17 has a length of 330 mm, a width of 66 mm, and a height of 89 mm in the illustration shown.

[0042] In the illustration shown, the transmission element 8 is formed by a sliding rod 8a. The sliding rod 8a is connected at one end to an output gear shaft (not shown) of the gearbox 10 in a rotationally secure manner and at the other end is linearly displaceable in a slide rail 11, which is arranged on an upper end face of the door leaf 3. To guide the sliding rod 8a in the slide rail 11, the sliding rod 8a has a sliding element 12, in particular a sliding block 12a, at the end facing the slide rail 11, which can slide along the slide rail 11. The sliding element 12 is rotatably mounted on the end of the sliding rod 8a facing the slide rail 11. By rotating the sliding rod 8a, the door leaf 3 can be opened or closed.

[0043] The drive unit 5 is completely enclosed within a receiving space 13 in the door frame 2, so that the electric motor 6, the brake 7, the control unit 9 and the gearbox 10 are not visible from the outside when the swing door 1 is installed. This is clearly shown in Fig. 3 The figure shows the open swing door 1 in a view from a low angle. The receiving chamber 13 is located between two end faces 14 of the door frame 2. By arranging the electric motor 6, the brake 7, and the gearbox 10 within the door frame 2, audible noise is advantageously reduced, and the appearance of the swing door 1 is made more appealing.

[0044] In Fig. 4 The drive unit 5 is shown in a front view. The door frame 2 is shown in cutaway. The gearbox 10 is designed as a right-angle gearbox 10a. Right-angle gearboxes are known from the prior art, and their operation will not be described in detail here. According to the invention, the gearbox 10 is designed to be non-self-locking. The right-angle gearbox 10a has an input side 15 with an input gearbox shaft (not shown) and an output side 16 with an output gearbox shaft (not shown). The input side 15, or the input gearbox shaft, and the output side 16, or the output gearbox shaft, are arranged at an angle of approximately 90° to each other. The input gearbox shaft is connected to the motor shaft 51 of the electric motor 6. The output gearbox shaft is connected to the transmission element 8.The angle gear 10a converts a rotary motion about a horizontal axis of the motor shaft 51 into a vertical axis of the output gear shaft. This allows the electric motor to be arranged horizontally, thus reducing the overall height of the swing door assembly.

[0045] According to the invention, the drive unit 5 has a brake 7.

[0046] The brake 7 is configured to transmit a holding braking torque MHold to the door leaf 3, preferably by friction, in a substantially de-energized state, in order to hold the door leaf in a predetermined angular position α1, α2 when a disturbance torque MDisturb acts on the door leaf 3. Furthermore, the brake 7 is configured to transmit a release braking torque MFree to the door leaf 3 in a energized state, which is reduced compared to the holding braking torque MHold. The holding braking torque MHold and the release braking torque MFree are in Fig. 4 This is illustrated. The holding braking torque MHold can, for example, be 0.8 Nm, measured at the motor shaft 51. The release braking torque MRelease is preferably 0 Nm, so that the brake 7 releases the door leaf 3 when energized. The holding braking torque MHold makes it possible to hold the door leaf 3 in the target angular position α1, α2 without the electric motor 6 having to compensate for deviations from the target angular position α1, α2 caused by any disturbance torques MDisturb. Advantageously, the brake 7 transmits the higher holding braking torque MHold compared to the release braking torque MRelease in the essentially de-energized state, so that the energy consumption of the drive unit 5 is low. The holding braking torque MHold is only applied by the brake 7 when a disturbance torque MDisturb acts on the door leaf 3 and preferably arises from friction. In the essentially de-energized state, the brake 7 is preferably completely de-energized.In one embodiment, however, it can also be provided that in the essentially currentless state a quiescent current flows through the brake 7, which, however, is significantly lower compared to the current that flows through the brake 7 in the energized state.

[0047] To bring the door leaf 3 into the desired angular position α1, α2, the control unit 9 can be configured to control the door leaf 3 to the desired angular position α1, α2 based on the instantaneous angular position αmoment. The instantaneous angular position αmoment of the door leaf 3 can be detected by means of a sensor (not shown), for example, one or more Hall sensors in the electric motor or a rotary encoder on the motor shaft 51.

[0048] In Fig. 8 The following are the procedure steps for pivoting the door leaf 3. To pivot the door leaf 3, the brake 7 can first be switched to the energized state (step 101). In the energized state, the brake 7 exerts only the release braking torque Mfree, thereby releasing the door leaf 3. Next, the door leaf 3 can be moved to the target angular position α1, α2 by appropriate control and / or regulation (step 102). When the door leaf 3 is in the target angular position α1, α2, the control and / or regulation can be deactivated and the brake 7 switched to the essentially de-energized state (step 103).

[0049] In Fig. 7 The drive unit 5 is partially shown in an exploded view. Fig. 7 A mounting plate 17 is visible, to which parts of the drive unit 5 can be attached. In particular, the gearbox 10 can be connected to the mounting plate 17, especially by screwing, riveting, gluing, or welding. In the illustrated embodiment, the mounting plate 17 has four through holes 18 for screws 19, with which the gearbox 10 can be attached to the mounting plate 17. The electric motor 6 is flanged to the gearbox 10 on the drive side, and the brake 7 is mounted to the gearbox 10 on the opposite, non-drive side. The screws 19 thus also indirectly attach the electric motor 6 and the brake 7 to the mounting plate 17 via the gearbox 10. The mounting plate 17 also has a through hole 20 for the passage of the gearbox output shaft or a connecting part (not shown), which can be connected to the transmission element 8.Mounting blocks 21 can be provided to fix the mounting plate 17 to the door frame 2. The mounting blocks 21 can be screwed or riveted to the door frame 2 and to the mounting plate 17. The mounting plate 17 also has an elongated recess 22 for at least partially accommodating the electric motor 6 and the brake 7, in order to reduce the overall size and enable stable mounting.

[0050] In the embodiment shown, the drive unit 5 with mounting plate 17 has a length of 330 mm, a width of 66 mm and a height of 89 mm. The drive unit 5 is designed to pivot a 180 kg door leaf 3 by 120° within 5 seconds.

[0051] Fig. 9A Figure 1 shows a brake 7 in the form of a friction brake 23 in a de-energized state. The friction brake 23 has a winding 24 from which wires 25 lead. The winding 24 can be energized by means of the wires 25. The winding 24 is located in a stator housing 26. The friction brake 23 can be flanged, in particular, to the non-drive side of the electric motor 6. The motor shaft 51 (not shown) of the electric motor 6 can be guided through the friction brake 23. The motor shaft 51 can be connected to a drive element 28 through an opening 27 in a rotationally fixed manner, preferably by positive locking. The drive element 28 can be arranged to be axially displaceable on the motor shaft 51. The drive element 28 forms a brake flange 29, which is arranged in a gap 30 of the brake 7. The friction brake 23 has an axially displaceable pressure element 31 which, in the de-energized state, engages the drive element 28 due to a spring force (see Fig. 9B ) against a pressure element 32 of the friction brake 23. In the de-energized state, there is an air gap 60 between the winding 24 and the pressure element 31. The pressure element 32 is part of the stator housing 26 or, like the pressure element 31, connected to it. The pressure element 31, the drive element 28, and the pressure element 32 each have friction surfaces that are in contact when de-energized. Friction surfaces are surfaces that are in contact during braking. The friction surfaces can be formed by friction linings 33, as is the case in the illustration. The friction surfaces on the drive element 28 are arranged on both sides. To make the braking process quieter, the brake flange 29 can be made of plastic. Such a brake flange 29 does not require friction linings 33.

[0052] When the winding 24 is energized, the pressure element 31 is forced against the spring force due to the resulting magnetic force (see Fig. 9B ) in the direction of the winding 24, so that the air gap 60 is closed and a gap is created between the pressure element 31 and the drive element 28. Since the drive element 28 is axially displaceable on the motor shaft 51, it can also detach from the pressure element 32 and subsequently rotate. In the energized state, the drive element 28 is thus released, so that only the release braking torque Mfree, which is preferably essentially 0 Nm, is applied by the friction brake 23.

[0053] Fig. 9B Figure 1 shows a spring 34 in a recess 35, which presses the pressure element 31 against the drive element 28 when the current is de-energized. The preload of the spring 34 can be adjusted by means of an adjusting screw 36. Preferably, several such springs 34 are arranged along the circumference of the pressure element 31. This is shown in Fig. 9CThe figure shows a front view of the brake 7. The opening 27 of the drive element 28 is visible. The motor shaft 51 (not shown) can be connected to the drive element 28 by means of a positive locking 37.

Claims

1. Swing door (1), comprising: - a door frame (2); - at least one door panel (3); - a drive unit (5) with: • an electric motor (6), in particular a servomotor (6a), with a motor shaft (51) for pivoting the door panel (3) relative to the door frame (2); • a feed forward / feedback control unit (9), which is configured to bring the door panel (3) into a target angular position (α1, α2) by feed forward controlling and / or feedback controlling the electric motor (6); and • an electrically actuatable brake (7); - a transmission element (8), in particular a slide rod (8a), for transmitting a rotational movement from the drive unit (5) to the door panel (3) or the door frame (2), characterized in that the brake (7) is configured to generate a holding brake torque (MHalte) in an essentially currentless state, preferably by friction, and to exert it on the door panel (3) in order to hold the door panel (3) in the target angular position (α1, α2) in the case of a disturbance torque (Mstör) acting on the door panel (3), wherein the door panel (3) is held in the target angular position (α1, α2) by the holding brake torque (MHalte) until any disturbance torque (Mstör) acting on the door panel exceeds the holding brake torque (Mhalte), wherein the brake (7) is further configured to generate a release brake torque (MFrei) that is reduced compared to the holding brake torque (MHalte) in an energized state and to exert it on the door panel (3), wherein the feed forward / feedback control unit (9) is configured to switch the electrically actuatable brake (7) into the energized state when the electric motor (6) is feed forward and / or feedback controlled and / or to bring the door panel (3) into the target angular position (α1, α2), wherein the feed forward / feedback control unit (9) is further configured to switch the electrically actuatable brake (7) into the currentless state when the door panel (3) is in the target angular position (α1, α2), wherein a non-self-locking angular gear (10a) is provided, which is connected on an input side (15) to the motor shaft (51) and is connected on an output side (16) to the transmission element (8), wherein the drive unit (5) is arranged in a compartment (13) of the door frame (2) and the holding brake torque (MHalte) measured at the motor shaft (51) lies in a range from 0.07 Nm to 2 Nm.

2. Swing door (1) according to claim 1, characterized in that the release brake torque (MFrei) essentially corresponds to 0 Nm, so that the door panel (3) is completely released from the brake (7) in the energized state.

3. Swing door (1) according to claim 1 or 2, characterized in that the holding brake torque (MHalte) lies in a range from 0.08 Nm to 1 Nm or from 0.08 Nm to 0.85 Nm.

4. Swing door (1) according to one of claims 1 to 3, characterized in that the brake (7) is a friction brake (23) or a form locking brake, in particular a tooth brake.

5. Swing door (1) according to one of claims 1 to 4, characterized in that the brake (7), preferably a friction surface, in particular a friction lining, is in preferably direct contact with a driver element (28) that is connected to the motor shaft (51) in the currentless state.

6. Swing door (1) according to one of claims 1 to 5, characterized in that a mounting plate (17) is provided, to which the electric motor (6), the gear (10) and / or the brake (7) is attached.

7. Swing door (1) according to one of claims 1 to 6, characterized in that at least one sensor, for example a Hall sensor or a rotary encoder, is provided, with which a current angular position (αmoment) of the door panel (3) can be determined.

8. Swing door (1) according to claim 7, characterized in that the forward / feedback control unit (9) is configured to feedback control the door panel (3) into the target angular position (α1,α2) based on the current angular position (αmo-ment).

9. Swing door (1) according to one of claims 1 to 8, characterized in that the drive unit is essentially completely received in the compartment (13) of the door frame (2).

10. Method for pivoting a door panel (3) of a swing door (1) according to one of claims 1-9 relative to a door frame (2) with the following steps: Switching an electrically actuatable brake (7) into an energized state, in which the brake (7) generates a release brake torque (MFrei) that is reduced compared to a holding brake torque (MHalte) and exerts it on the door panel; Feed forward Controlling and / or feedback controlling an electric motor (6) to bring the door panel (3) into a target angular position (α1, α2); Switching the brake (7) into an essentially currentless state, in which the brake (7) generates the holding brake torque (MHalte) preferably by friction and exerts it on the door panel (3) when the door panel (3) is in the target angular position (α1,α2), in order to hold the door panel (3) in the target angular position (α1, α2) in the case of a disturbance torque (MStör) acting on the door panel (3), wherein the door panel (3) is held in the target angular position (α1, α2) by the holding brake torque (MHalte) until any disturbance torque (MStör) acting on the door panel (3) exceeds the holding brake torque (MHalte), wherein a non-self-locking angular gear (10a) is provided, which is connected on an input side (15) to the motor shaft (51) and is connected on an output side (16) to the transmission element (8), wherein the drive unit (5) is arranged in a compartment (13) of the door frame (2) and the holding brake torque (MHalte) lies in a range from 0.07 Nm to 2 Nm.

Images