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EP-4392637-B1 - DRIVE ASSEMBLY FOR A LIFTABLE GATE WITH A TUBE MOTOR ON A STATIC SHAFT, LIFTABLE GATE, AND METHOD FOR OPERATING A LIFTABLE GATE

EP4392637B1EP 4392637 B1EP4392637 B1EP 4392637B1EP-4392637-B1

Inventors

  • SEYSEN, MANFRED

Dates

Publication Date
20260513
Application Date
20220615

Claims (15)

  1. A drive device (10) for a lifting door (100), comprising: an inner shaft (4) having an inner shaft length (6); and an outer hollow shaft (5) having a hollow shaft length (7); wherein the outer hollow shaft (5) is aligned concentrically with the inner shaft (4); wherein the inner shaft (4) is designed to be mounted in a rotationally fixed manner on the lifting door (100) in an installed state; wherein the outer hollow shaft (5) rotates about the inner shaft (4) when the drive device (10) is activated in the installed state; and wherein the outer hollow shaft (5) is configured to wind up or unwind a door leaf (130) of the lifting door (100) when the drive device (10) is activated.
  2. The drive device (10) according to claim 1, further comprising a first motor (1) with a first outer motor element (2) and a first inner motor element (3), wherein the first inner motor element (3) is mounted in a rotationally fixed manner on the inner shaft (4); wherein the first outer motor element (2) surrounds the first inner motor element (3) and is connected to the first inner motor element (3) via a rotatable connection (12); wherein the outer hollow shaft (5) surrounds the first outer motor element (2); and wherein the outer hollow shaft (5) is connected to the first outer motor element (2) via a rotationally fixed connection (13).
  3. The drive device (10) according to claim 2, wherein the outer hollow shaft (5) is formed integrally with the first outer motor element (2).
  4. The drive device according to claim 2, wherein the rotationally fixed connection (13) of the outer hollow shaft (5) to the first outer motor element (2) is provided via a frictional connection.
  5. The drive device according to claim 2, wherein the rotationally fixed connection (13) of the outer hollow shaft (5) to the first outer motor element (2) is provided by a screw connection, by a welded connection, by a riveted connection or by an adhesive connection.
  6. The drive device (10) according to any one of claims 2 to 5, wherein the first outer motor element (2) and the first inner motor element (3) extend along the entire hollow shaft length (7).
  7. The drive device (10) according to any one of claims 2 to 5, further comprising at least one second motor (1) with a second outer motor element (2) and a second inner motor element (3), wherein the second motor (1) is arranged adjacent to the first motor (1); wherein the second inner motor element (3) is mounted in a rotationally fixed manner on the inner shaft (4); wherein the second outer motor element (2) surrounds the second inner motor element (3) and is connected to the second inner motor element (3) via a rotatable connection (12); and wherein the outer hollow shaft (5) surrounds the second outer motor element (2) and is connected to the second outer motor element (2) in the same way as to the first outer motor element (2) via a rotationally fixed connection (13).
  8. The drive device (10) according to any one of the preceding claims, wherein the inner shaft length (6) is greater than the hollow shaft length (7), so that the inner shaft (4) protrudes laterally beyond the hollow shaft (5) such that a first lateral protrusion (8) and a second lateral protrusion (9) are formed; wherein a toothed disc (11) is mounted on the inner shaft (4) and rotatably with respect to the inner shaft (4) on at least one of the first lateral protrusion (8) and the second lateral protrusion (9); and wherein the outer hollow shaft (5) is fixedly connected to the toothed disc (11).
  9. The drive device (10) according to any one of the preceding claims, wherein the first motor (1) is a polyphase current asynchronous motor.
  10. The drive device (10) according to any one of the preceding claims, wherein the first motor (1) is a synchronous motor.
  11. The drive device (10) according to any one of the preceding claims, further comprising a braking device (20), wherein the braking device (20) is designed to selectively connect the outer hollow shaft (5) to the inner shaft (4) in a rotationally fixed manner in order to brake a movement of the drive device.
  12. A lifting door (100), comprising: a drive device (10) according to any one of claims 1 to 10; a first door frame (120) and a second door frame (120); a door lintel (110); a door leaf (130); and an input device (140, 150), wherein the drive device (10) is arranged in the door lintel (110); wherein the inner shaft (4) of the drive device (10) is mounted in a rotationally fixed manner on a first side and on a second side of the door lintel (110); wherein the door leaf (130) is guided in the first door frame (120) and in the second door frame (120); and wherein the outer hollow shaft (5) winds up or unwinds the door leaf (130) when the drive device (10) is activated via the input device (140, 150).
  13. A method (200) for operating a lifting door (100) according to claim 12, wherein the method (200) comprises the steps of: detecting (201) a user input (203) for opening or closing the lifting door (100); activating (202) the drive device (10) by supplying the drive device (10) with electrical energy in response to the detection of the user input (203); depending on the type of the user input (203), lifting (204) or lowering (205) the door leaf (130) by the activated drive device (10) via the outer hollow shaft (5), by operating the drive device (10) in the corresponding direction.
  14. The method (200) according to claim 13, wherein the user input (203) is an input via a control panel (140) of the lifting door (100).
  15. The method (200) according to claim 13, wherein the user input (203) is a detection of an object moving onto the lifting door (100) by sensors (150).

Description

TECHNICAL AREA The present disclosure relates to lifting gates in general and, in particular, to drive devices for such lifting gates. TECHNICAL BACKGROUND Overhead doors have long been used, for example, in factories or warehouses as passageways or driveways between separate areas. These doors are equipped with a vertically movable door leaf, which is guided in two lateral door frames. When the door opens, the door leaf is pulled upwards by a drive mechanism, and when the door closes, it is lowered downwards. Prior art includes doors with a flexible, foil-like door leaf, as well as doors with segmented door leaves consisting of individual, pivotally connected, fixed door leaf segments. Generally, different drive mechanisms are required for overhead doors with a foil covering and those with a fixed door leaf to move or guide the door leaf. Furthermore, high-performance motors are necessary, especially for high-speed doors, and these are typically located in a door head to the side of the actual door leaf mounting. The US 4 651 940 A This describes an umbrella winding device in which the power of an external rotor motor contained in an umbrella winding shaft is transferred to the umbrella winding shaft in normal reverse direction after its speed has been reduced. A brake is applied synchronously to the torque output of the motor by a braking mechanism. Motor stopping is activated. The number of revolutions of the umbrella winding shaft is counted by a counter, and the motor is controlled to stop at a preset number of revolutions. The output of a manually operated shaft, turned in the normal reverse direction, is transferred to the umbrella winding shaft by a self-locking mechanism after the speed has been reduced. DESCRIPTION Accordingly, the object of the invention can be considered to be to provide a space-saving drive device for a lifting gate that is suitable for use both for lifting gates with a flexible gate leaf or curtain and for lifting gates with a fixed and segmented gate leaf. This problem is solved by a drive device according to claim 1, by a lifting gate according to claim 12, and by a method for operating such a lifting gate according to claim 13. Further embodiments are described in the dependent claims and in the following description. According to a first aspect of the invention, a drive device for a lifting gate is provided. The drive device has an inner shaft with an inner shaft length of [missing value] and an outer hollow shaft with a hollow shaft length of [missing value]. The outer hollow shaft is aligned concentrically with the inner shaft. The inner shaft is configured to be rotationally fixed to the lifting gate in an installed state. The outer hollow shaft rotates about the inner shaft when the drive device is put into operation in the installed state. The outer hollow shaft is configured to wind up or unwind a gate leaf of the lifting gate when the drive device is put into operation. Such a drive device is designed to be installed in the lintel of a lifting gate. The inner shaft is a standard commercial shaft with suspension or bearing points at its ends. In the prior art, such a shaft is typically driven directly by a motor, with the drive force being transmitted via the shaft to various transmission devices such as belts or pulleys to open and close the gate. According to the present disclosure, the inner shaft is designed such that it is mounted at its ends in a gate lintel to prevent rotation when the drive device is installed in the lifting gate. Thus, the inner shaft does not rotate during operation of the drive device, but remains stationary relative to the lifting gate. For this purpose, the inner shaft can, for example, be fixed in corresponding recesses in the sides of a gate lintel to prevent rotation. The inner shaft can, for example, be screwed, riveted, or otherwise suitablely connected to the gate lintel at its ends to prevent rotation. The outer hollow shaft, on the other hand, is a type of tube arranged concentrically, i.e., with the same center point, around the inner shaft. The outer hollow shaft is rotatable relative to the inner shaft. For example, the outer hollow shaft can be driven or rotated relative to the inner shaft by one or more motors, as described in more detail below with reference to specific embodiments. For this purpose, the outer hollow shaft can, for example, be rotatably mounted at its ends in a gate head when the drive device is installed in a lifting gate, so that the hollow shaft can be rotated around its central axis without changing its position relative to the gate head in a horizontal or vertical direction. In a lifting gate with a foil-like door leaf or curtain, the outer hollow shaft can simultaneously serve to directly receive or wind up the door leaf when the gate opens. However, in a gate with a fixed or segmented door leaf, the torque of the drive mechanism can also be transmitted via the outer hollow shaft to other moving and