SLIDING DOOR FOR AIRCRAFT AND AIRCRAFT
Patent Information
- Application Number
- BR112023026110
- Authority / Receiving Office
- BR · BR
- Patent Type
- Patents
- Current Assignee / Owner
- Publication Date
- 2026-09-08
Smart Images
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Abstract
Description
1 / 18 SLIDING DOOR FOR AIRCRAFT AND AIRCRAFT
[001] The present invention relates to a sliding aircraft door comprising: A door leaf that slides between a closed position and an open position in the opening and closing directions, respectively, and has an upper door part and a lower door part that are arranged in an extended state in the closed position and in a retracted state in the open position; a guide rail, inclined with respect to the opening and closing directions, to guide the door leaf between the closed and open positions; and a drive device that has an electric motor to assist the movement of the door leaf from the open position to a closed position.
[002] The invention also relates to an aircraft comprising: An interior with a first space area and a second space area, with a sliding aircraft door located between the first space area and the second space area of the interior.
[003] A sliding aircraft door (partition door) is known from document EP 2 540 616 B1. The sliding door has a two-part door leaf that is pushed together transversely to the opening direction when the door is opened and thus stored in a space-saving manner. The sliding aircraft door can be used to separate two spatial areas in the aircraft, the door leaf being stored in the open position in a compartment of an intermediate wall. For this purpose, the sliding aircraft door is adapted to the interior geometry of the aircraft. The upper edge of the door structure is curved and, Petition 870260018122, dated 26 / 02 / 2026, page 6 / 58 2 / 18 therefore, adapted to the cross-section of the aircraft. The door leaf has a corresponding curvature such that the door opening can be completely closed by the door leaf. The door leaf has an upper door leaf section and a lower door leaf section that are connected to linear guides. The linear guide of the upper door leaf section is arranged so as to rise obliquely in the direction of closing. This ensures that the upper door leaf section, which is adapted to the curved upper edge of the door opening, can move into the curvature from the lower section as a result of the complete closure of the door. The linear guide of the lower door leaf section is arranged so as to descend obliquely in the direction of closing. As a result, the upper door leaf section is moved upwards and into the upper door leaf section, which is hollow in that area, when the door is opened.For electrical assistance, a gas pressure spring is provided, which supports the closing of the aircraft sliding door.
[004] A different separation device for separating an aircraft cabin is known from patent document FR 3 050 717 A1.
[005] Sliding doors for aircraft are shown in documents WO 2018 / 132856 A1 and WO 91 / 00823 A1.
[006] In patent document EP 2 540 616 B1, closing mechanisms driven by electric motors are also mentioned, but are described as disadvantageous because such closing mechanisms are no longer fully usable in the event of a power supply failure.
[007] Therefore, the objective of the present invention is to develop a retractable sliding door of the type mentioned above, which at least reduces or eliminates the disadvantages of the prior art. According to an object of the invention, it is preferred to provide a sliding door Petition 870260018122, dated 26 / 02 / 2026, page 7 / 58 3 / 18 that is simple, safe to open and close, and meets high safety standards, yet with minimal structural effort.
[008] The object is reached by a sliding door that has the characteristics of claim 1. Preferred exemplary embodiments are stated in the dependent claims.
[009] According to the invention, the drive device has a spindle, in particular a ball screw, which is connected to the electric motor and is inclined with respect to the opening and closing direction, such that the door leaf is automatically transferred to the open position along the spindle when the electric motor is in a de-energized state.
[0010] In the open position of the sliding door, with the passageway opening clear, the upper and lower parts of the door leaf are pushed together transversely in the opening and closing directions, respectively. Since the upper and lower parts of the door are arranged in an overlapping manner, in an open position, the door leaf can be stored in a space-saving way, particularly in an intermediate wall between two spatial areas of the aircraft interior. In the closed position, the door leaf is pulled transversely in the closing direction to close the passageway opening. The aircraft sliding door can be used, for example, to separate two spatial areas inside an aircraft. The aircraft sliding door is therefore preferably adapted to the geometry of the interior. The upper edge of the upper part of the door is therefore preferably curved.Preferably, the top and bottom of the door are each connected to a guide rail. At least one guide rail on the top of the door is angled downwards, as seen in the direction of the opening. The end of the guide rail facing the passage opening is therefore longer than the other. Petition 870260018122, dated 26 / 02 / 2026, p. 8 / 58 4 / 18 end of the guide rail facing outwards from the passage opening. This ensures that the upper part of the door, which is adapted to the curved upper edge of the door opening, can move into the curvature from the bottom as a result of the door being fully closed. At least one guide rail of the lower part of the door is preferably arranged inclined upwards, as seen in the opening direction. Depending on the model, a locking device may be provided with which the door leaf can be locked in the closed position. To close the sliding door, a door leaf is connected to the electric motor of the drive device for the purpose of closing or opening the sliding door. According to the invention, the drive device has a spindle, which is inclined (preferably horizontally) relative to the opening and closing directions, respectively, in the sliding plane at an angle of inclination other than 0° or 180°.The spindle's arrangement and design are such that, in a de-energized state, i.e., in a state without power assistance, for example, in the event of a power supply failure, the sliding door is automatically transferred, i.e., solely under the effect of gravity, from the closed position to the open position, to release the passage opening. The spindle is inclined downwards, as seen in the direction of the opening. The end of the spindle facing the passage opening is therefore larger than the end of the spindle facing away from the passage opening. The angle of inclination of the spindle with respect to the opening and closing direction is preferably from 25° to 45°, more preferably from 30° to 40°, for example, substantially 34°. Preferably, the spindle is arranged substantially parallel to the guide rail of the upper part of the door.The sliding door therefore opens automatically in the event of a power failure or associated emergency, as gravity causes the sliding door to slide into the open position. Petition 870260018122, dated 26 / 02 / 2026, p. 9 / 58 5 / 18 The lower and upper parts of the door are pushed together with the aid of the guide rail. The lower part of the door is preferably lighter than the upper part to ensure automatic sliding together. The sliding plane is also the main extension plane of the sliding door. The spindle has an external thread that increases the distance to be traveled along the spindle and thus slows down the opening speed of the sliding door. In a preferred embodiment, the sliding door has a substantially constant opening speed from the closed to the open position. Advantageously, the sliding door is thus smoothly opened. It is particularly preferred that the drive device has the ability to transfer the sliding door from the open state to the closed state and from the closed state to the open state, free of springs and additional gas pressure dampers.Such additional devices were often required in known designs, for example, with a toothed belt drive, to brake a sliding door during gravity storage in the last section of the movement.
[0011] For the purposes of this disclosure, location and direction indications, such as horizontal, vertical, up or down, refer to the intended condition for installing a sliding door on the aircraft when the aircraft is oriented horizontally.
[0012] The electric motor is preferably a brushless DC motor.
[0013] The electric motor is preferably configured to rotate the spindle to transfer the sliding door from the open position to the closed position, preferably therefore from the closed position to the open position. Preferably, the electric motor can be connected to the spindle by means of a gear mechanism. With the gear mechanism, a motor speed of the electric motor can be Petition 870260018122, dated 26 / 02 / 2026, page 10 / 58 6 / 18 translates to a spindle drive speed. The transmission ratio between the motor and the drive speed is preferably 1:1 to 1:10.
[0014] In a preferred embodiment, the drive device has a nut that receives the spindle and moves linearly along the spindle, rotating it with the electric motor. The spindle is preferably a ball screw. In this embodiment, running grooves are incorporated into the spindle and the nut, which receive the balls and thus produce a proper fit between the spindle and the nut. Return channels are preferably provided in the nut, through which the balls are returned. Thus, the path of the balls is closed. A ball screw is known, for example, from document DE 100 22 715 B4. The nut is preferably connected to the door leaf in such a way that the movement of the nut along the spindle is converted into the opening and closing movement of the door leaf.Due to the interaction between the nut and the spindle, the opening speed in the de-energized state of the electric motor is slowed down to such an extent that additional damping elements, such as gas pressure springs, to dampen the opening movement of the door leaf, can preferably be dispensed with. Furthermore, the electric motor, in this case acting as a generator, can also brake.
[0015] In a preferred embodiment, the nut is connected to a door suspension at the top of the door by means of a drag device. The door suspension can be attached, for example, to a longitudinal (preferably substantially vertical) edge of the top of the door. With the aid of the drag device, the movement of the nut in the driven state of the electric motor is transmitted to the door suspension, which pulls the door leaf, in particular, from the closed position to the open position.
[0016] For power transmission between the device of Petition 870260018122, dated 26 / 02 / 2026, p. 11 / 58 7 / 18 drive and the door leaf, it is advantageous if the drive device has a drive element, particularly a drive screw, connected to the nut, and a receptacle connected to the door suspension. The drive element, particularly a drive screw, transmits the movement of the nut along the spindle to the receptacle, which is connected to the door suspension in such a way that the door leaf can be closed, and therefore particularly opened, with the aid of the drive device.
[0017] In a preferred embodiment, it is foreseen that - the drag element is movably connected to the receptacle in the door suspension in a first direction, parallel to the door leaf and perpendicular to the longitudinal axis of the spindle and / or that - the drag element is movably connected to the receptacle in the door suspension in a second direction, perpendicular to the door leaf and perpendicular to the longitudinal axis of the spindle and / or that - the drive element is fixedly connected to the receptacle in a third direction, parallel to the longitudinal axis of the spindle.
[0018] Mobility in the first and second directions helps prevent the door leaf from jamming. Preferably, the degrees of freedom in the first and second directions, from the neutral position, allow a movement of at least + / - 2 millimeters (mm), particularly from 3 mm to 10 mm, for example, substantially + / - 4 mm. Only in a third direction, parallel to the longitudinal axis of the spindle and therefore in the direction of the nut's movement along the spindle, is the drive element fixedly connected to the receptacle, i.e., without play. This ensures efficient dragging of the receptacle (and thus also of the door leaf). Furthermore, abrupt movements of the door leaf along the third direction can be detected by external action and, if necessary, the closing of the sliding door can be Petition 870260018122, dated 26 / 02 / 2026, page 12 / 58 8 / 18 interrupted.
[0019] Preferably, the receptacle has a recess in which a support for the drag element is arranged so as to be movable in the first direction and substantially immobile in the third direction, the drag element being arranged in the support so as to be movable in the second direction. The support makes it possible, in a simple way, to transmit movements from the drag element to the receptacle in the door leaf in a forced locking mode, only in the third direction.
[0020] In a preferred embodiment, a device is provided to detect an excess of torque from the electric motor, with which a blocked state of the door leaf can be verified during the transfer between the closed and open positions. Blocking the door leaf could lead to damage to the sliding door, particularly to the door leaf and / or the drive device, or even injure a user. If an excess of torque is detected, the drive direction of the electric motor can be reversed or, if this is not possible, for example, in the case of a software error, the sliding door can be de-energized, so that the sliding door is transferred to the open position by gravity.
[0021] In a preferred embodiment, the electric motor is rotatably mounted on a drive device support structure. The electric motor can be rotated or pivoted around its drive shaft due to the effective torque during the electric motor's operation. In this arrangement, it is possible to avoid damage to the electric motor or spindle due to increased torque. Furthermore, excess torque can be deducted from the motor's rotation, for example, due to a door blockage.
[0022] In a preferred embodiment, the drive device has at least one first spring, which drives the electric motor from a first rotated state, in one direction, to the direction of Petition 870260018122, dated 26 / 02 / 2026, page 13 / 58 9 / 18 a neutral position, in which the drive device preferably has a second spring, which drives the electric motor from a second rotated state, in another direction, towards the neutral position. Starting from its neutral or central position, the electric motor is mounted so as to rotate in both directions around its drive axis. The electric motor is loaded in one direction when the sliding door is opened and in the other direction when the sliding door is closed. Each of the two springs drives the electric motor to the neutral position and thus neutralizes the torque on the electric motor. The rotation of the electric motor is proportional to the torque acting on it.
[0023] In a preferred embodiment, the device for detecting the door leaf locking state has a sensor that detects a rotation of the electric motor around its drive shaft due to excess torque. The rotation or turning of the electric motor is proportional to the torque acting on it. Thus, excess torque can be determined based on the rotation of the electric motor. The sensor detects when a certain angle of rotation is exceeded to determine a corresponding excess torque.
[0024] In order to detect the angle of rotation corresponding to the desired maximum torque by structurally simple means, the device for detecting the door leaf locking state, in a preferred embodiment, has an actuating element that is fixedly and rotatably connected to the electric motor and that actuates the sensor when the electric motor is rotated due to excess torque.
[0025] In addition, the drive device may be fitted with a control unit, which switches the electric motor to a de-energized state when the locked state of a door leaf is detected. User safety can be substantially ensured by switching off the electric motor due to over-torque when a sliding door is locked. Petition 870260018122, dated 26 / 02 / 2026, page 14 / 58 10 / 18
[0026] Preferably, the spindle has a gear ratio such that a complete rotation of the spindle causes a movement of the door leaf in the closing and opening direction of less than 30 mm, particularly from 5 mm to 15 mm. The transmission ratio increases the path along the external thread of the spindle compared to feeding a nut along the longitudinal axis of the spindle.
[0027] Preferably, a first limit switch is provided to detect the open position of the door leaf and a second limit switch is provided to detect the closed position of the door leaf. The two limit switches detect the respective end positions of a door leaf. The first and / or second limit switch can be connected to the control unit. Thus, the actuation of the first or second sensor can be used to control the electric motor, particularly to switch off the electric motor.
[0028] In order to be able to release the access opening independently of the sliding mechanism in exceptional circumstances, particularly in a dangerous situation, it is advantageous if at least one upper and one lower part of the door is mounted in such a way as to be rotated around a hinge axis that runs substantially perpendicular to the predetermined trajectory, the rotation of the respective part of the door being blocked in the operational state by means of at least one safety element. This creates a known safety mechanism, which can be activated, for example, if a certain pressure difference occurs between the inside and outside of a sliding door. Alternatively, the safety element can be unlocked by the manual application of force, for example, if the sliding mechanism for opening a sliding door fails. Thus, in exceptional situations, the access opening can be released by rotating a sliding door.The present invention is further explained with reference to an exemplary embodiment illustrated in the following. Petition 870260018122, dated 26 / 02 / 2026, page 15 / 58 11 / 18 drawings.
[0029] Figure 1 shows a sliding door for an aircraft, according to the invention, with a drive device, in which an electric motor drives a spindle, wherein, in case of failure in the power supply of the electric motor, the sliding door automatically slides to the open position.
[0030] Figure 2 shows the sliding door actuation device for aircraft as per Figure 1, in exploded view.
[0031] Figure 3 shows an exploded view of a receptacle connected to the door suspension, to which the movement of the drive nut running along the spindle is transmitted.
[0032] Figure 1 shows a retractable sliding aircraft door (partition door), which, in the embodiment shown, is used in the passenger compartment of an aircraft. The sliding door 1 closes the passage opening within a door frame 2, which is designed, for example, as an intermediate wall of the aircraft. The door frame 2 has an edge 3 which, in the embodiment shown, is curved according to the internal contour of the aircraft fuselage. Thus, in addition to the passage opening, only a reduced storage space is available, which requires an adaptation of the sliding door 1 in order to prevent the sliding door 1 from being blocked during the operation process by the curved edge 3 of the door frame 2.Sliding door 1 slides along a horizontal path in the opening and closing direction 4, between the closed position shown in Figure 1, in which the passage opening is closed, and the open position (not shown), in which the passage opening is exposed. Sliding door 1 has two door parts that form the door leaf 5 and which, as shown in this embodiment, are designed as an upper part of door 5A and a lower part of door 5B, respectively. In the closed position of sliding door 1,... Petition 870260018122, dated 26 / 02 / 2026, page 16 / 58 12 / 18 Door parts 5 and 5B are arranged in a pulled-out position, in which door parts 5A and 5B completely fill the passage opening.
[0033] In order to store the sliding door 1 close to the passage opening in order to save space, the door parts 5A and 5B are pushed together perpendicular to the opening direction 4 when the sliding door 1 is opened, for example, by means of a handle 6. During closing, the upper part of door 5A is moved downwards in the vertical direction (see arrow 7) and the lower part of door 5B is moved upwards in the vertical direction (see arrow 8), so that the door parts 5A and 5B overlap more and more during closing. When the open position of the sliding door 1 is reached, the lower edges of the door parts 5A and 5B are arranged substantially at the same height, such that the total height of the sliding door 1 in the retracted and pushed position corresponds to the height (or length) of the upper part of door 5A.
[0034] As can also be seen from Figure 1, the upper part of door 5A is mounted in a sliding manner by means of a guide rail 9, which is attached to the frame structure of door 2. In the embodiment shown, the upper part of door 5A is connected to the second guide rail 9A, which runs parallel to guide rail 9, to increase stability. The lower part of door 5B is correspondingly sliding by means of a guide rail 10 fixed to the frame structure of door 2.
[0035] As can also be seen from Figure 1, the guide rails 9, 9A, with which the upper part of the door 5A is mounted in a sliding manner, run at a first angle of inclination relative to the sliding direction 4 of the sliding door 1. The angle of inclination of the guide rails 9, 9A causes the upper part of the door 5A to be guided downwards in the direction of arrow 7 when the door Petition 870260018122, dated 26 / 02 / 2026, p. 17 / 5813 / 18 sliding door 1 is opened. The guide rail 10 of the lower part of door 5B is correspondingly inclined at a second angle of inclination relative to the horizontal trajectory 4 of sliding door 1, which causes the lower part of door 5B to be guided upwards in the direction of arrow 8 when sliding door 1 is opened. In this case, the guide rails 9, 9A, 10 are arranged to converge in the direction of the sliding direction 4, resulting in the fact that, when sliding door 1 is opened, the parts of door 5A and 5B are displaced in opposite directions until the retracted, pushed position is reached. In the embodiment shown, the parallel guide rails 9, 9A of the upper part of door 5A have a steeper course than the guide rail 10 of the lower part of door 5B.Thus, during the transfer to the retracted position, the upper part of door 5A is moved downwards, in the direction of arrow 7, by a greater distance than the lower part of door 5B, which is moved upwards, in the direction of arrow 8. The first angle of inclination of the guide rails 9, 9A of the upper part of door 5A can be, for example, substantially 34°, where the angle of inclination of the guide rail 10 of the lower part of door 5B can be, for example, substantially 13°.
[0036] As can also be seen from Figure 1, the upper part of door 5A is coupled to an actuating device 11 to automatically transfer parts of doors 5A and 5B from the open position to the closed position. For this purpose, the actuating device 11 has an electric motor 12. The electric motor 12 drives a spindle 13, which transfers the door leaf 5 from the open position to the closed position. The spindle 13 is, in turn, inclined at a third angle of inclination relative to the horizontal, which causes the door leaf 5 to be independently transferred to the open position along the spindle 13, in a de-energized state of the electric motor 12. In the embodiment shown, the third angle of inclination Petition 870260018122, dated 26 / 02 / 2026, page 18 / 58 14 / 18 corresponds to the first angle of inclination of the guide rails 9, 9A.
[0037] The sliding door 1 also has a locking mechanism 14 with a locking unit 15 fixed to the door frame structure 2, which forms a locking receptacle for a corresponding locking element (not shown) connected to the door suspension 16 of a door top 5A. When the open position of the sliding door 1 is reached, the locking element is locked into the locking receptacle of the locking unit 15. The bottom of the door is fixed to another door suspension 17.
[0038] Figure 2 shows the drive device 11 of Figure 1. The electric motor 12 can be seen driving the spindle 13, here designed as a ball screw. The nut 20, in this case a ball screw nut, is positioned on the spindle. The balls (not shown) are arranged in grooves that run between the spindle 13 and the nut 20, which are used to move the spindle 13. These balls move axially as the spindle 13 rotates. The balls are returned through return channels in a nut 20, and a circuit is created.
[0039] In order to transfer the sliding door 1 from the open position to a closed position, the electric motor 12 rotates the spindle 13, while the nut 20 is moved along the longitudinal direction 21 of the spindle 13.
[0040] Nut 20 is connected to the top of door 5A by means of a drag device 18. The drag device 18 has a drag element connected to nut 20, in the exemplary embodiment shown, a drag screw 19, and a receptacle 22 connected to the door suspension (see Figure 3).
[0041] The spindle 13 has a transmission ratio such that a complete rotation of the spindle 13 causes a movement of the door leaf 5 in the closing and opening direction, along the opening and closing direction 4, respectively, for example, substantially, of 10 mm. Petition 870260018122, dated 26 / 02 / 2026, page 19 / 58 15 / 18 For this purpose, spindle 13 has an external thread that interacts with a nut 20 by means of balls. The thread pitch and the diameter of spindle 13 influence the transmission ratio.
[0042] As also shown in Figure 2, the drive device has a stationary support structure 23, on which the spindle 13 is rotatably mounted. Furthermore, the motor assembly 24 is rotatably or pivotally mounted on the support structure 23. The motor assembly 24 has the electric motor 12 disposed in a bearing 29. A support 25 with a downward-projecting pin 26, whose function is described below, is provided between the electric motor 12 and the bearing 29. The individual components are fastened to each other by means of screws 28. The bearing 29 is disposed in a bearing housing 27. The drive shaft 30 of the electric motor 12 is connected to the spindle 13 by means of a gear mechanism. In the embodiment shown, the gear mechanism is formed by a first toothed belt pulley 31 and a second toothed belt pulley 32, which are connected to each other by a toothed belt 33.The drive shaft 30 is connected to the first pulley of the toothed belt 31. Through the belt 33, torque is transmitted from the first pulley of the toothed belt 31 to the second pulley of the toothed belt 32, which is connected to the spindle 13. The second pulley of the toothed belt 32 has a larger diameter than the first pulley of the toothed belt 31, as a result of a transmission ratio of, for example, 1:2 achieved between the speed of the drive shaft motor 30 of the electric motor 12 and the drive speed of the spindle 13. The toothed belt 33 is tensioned with the aid of a tensioning wheel 35.
[0043] The drive shaft 30 projects through a passage 34 in the support structure 23. The support structure 23 is connected to the support structure of the door frame 2. Petition 870260018122, dated 26 / 02 / 2026, page 20 / 58 16 / 18
[0044] As can also be seen from Figure 2, the support has individual holes 36 in the pin 26, which are arranged at different distances from the central point of the support 25. Two springs 37, 38, each connected to the support structure 23, fit into one of these holes 36. The first spring 37 drives the electric motor 12 from a state rotated in one direction towards a neutral position. The second spring 38 drives the electric motor 12 from a second state rotated in the other direction towards a neutral position. Thus, the springs 37, 38 bring the electric motor 12 or the motor assembly 24 to a neutral position. When torque acts on the electric motor 12, the motor assembly 24 rotates around the drive shaft 30 against the springs 37, 38 until a balanced state between the torque and the spring force is reached. The rotation of electric motor 12 is therefore proportional to the torque acting on electric motor 12.
[0045] It can also be inferred from Figure 2 that a device 39 is provided for detecting an excess torque of the electric motor 12, with which a blocked state of the door leaf 5 can be verified during the transfer between the closed and open positions. The device 39 for detecting excess torque has a sensor 40, which detects the rotation of the electric motor 12 due to the excess torque. For this purpose, an actuating element 41 is provided, in particular, a cam, connected to the electric motor 12 in a rotationally fixed manner. The actuating element 41 actuates the sensor 40 when the electric motor 12 is rotated due to the excess torque. The excess torque is determined based on the rotation of the motor assembly 24 and thus, therefore, of the electric motor 12. The rotation depends on the torque and the spring force, which, in turn, is determined by the characteristics of the springs 37, 38 and the deflection of the springs 37, 38.Therefore, the drive torque is adjustable by means of hole 36 into which springs 37 and 38 fit. At a constant torque for electric motor 12, the holes... Petition 870260018122, dated 26 / 02 / 2026, page 21 / 58 Holes 17 / 18 at the outer end of pin 26 result in less rotation of the motor assembly 24 than holes 36 located further inward. If excess torque is detected, the electric motor can be switched to a de-energized state by a control unit 42 (see Figure 1). In this case, the sliding door 1 automatically moves to the open position.
[0046] As can also be seen in Figure 2, a first limit switch 43 is provided to detect the open position of the door leaf 5 and a second limit switch 44 is provided to detect the closed position of the door leaf.
[0047] Figure 3 shows a drag device 18, which receives the drag screw 19 in the nut 20 in the receptacle 22 connected to the door leaf 5 or to the top of the door 5A.
[0048] The drive screw 19 projects into the receptacle 22. A support 45, which has a central hole 46, is provided in the receptacle 22. The drive screw 19 is received by a bushing, which, in turn, is received in the central hole 46 of the support 45. The support 45 is received in a recess 47 of the receptacle 22.
[0049] Figure 3 further shows Teflon strips 48 that reduce friction between the support 45 and an inner wall of the receptacle 22 in the recess area 47. The support 45 is fixed to the drive device 18 by means of a cover plate 49. Screws 50 are provided for this purpose. The cover plate 49 has an elongated hole 51, which ensures that the support 45 can move in the recess 47. The support 45 has a first clearance in the recess 47 in a first direction parallel to the door leaf 5 and perpendicular to the longitudinal axis of the spindle 13. In a third direction along the longitudinal axis of the spindle 13, the support 45 has no clearance in the recess 47. The drive screw 19 is movably arranged in the support 45 in a second direction with a second clearance. The second direction coincides with the axis Petition 870260018122, dated 26 / 02 / 2026, page 22 / 58 18 / 18 longitudinal of the drive screw 19 and is therefore normal to the main extension plane of a door leaf 5 and normal to the longitudinal axis of the spindle 13. The Teflon strips 48 substantially do not affect the first and second clearance.
[0050] The drag device 18 is connected to the door suspension 16 of the upper part of door 5A by means of other screws 52. Petition 870260018122, dated 26 / 02 / 2026, p. 23 / 58
Claims
1 / 4 CLAIMS 1. Sliding door for aircraft (1) comprising: a door leaf (5), which is sliding between a closed position and an open position in the opening and closing directions, respectively, and having an upper part (5A) of the door and a lower part (5B) of the door, which are arranged in an extended state in the closed position and in a retracted state in the open position, a guide rail (9), inclined with respect to the opening and closing direction, to guide the door leaf (5) between the closed and open positions, an actuating device (11) having an electric motor (12) to assist the movement of the door leaf (5) from the open position to the closed position, characterized in that the actuating device (11) comprises a spindle (13), particularly a ball screw, which is connected to the electric motor (12) and is inclined with respect to the opening and closing direction such that the door leaf (5) is transferred,automatically, to the open position along the spindle (13) in a de-energized state of the electric motor (12)., 2. Sliding door for aircraft (1), according to claim 1, characterized in that the drive device (11) comprises a nut that receives the spindle (13), which nut runs along the spindle (13) by means of rotation of the spindle (13) with the electric motor (12).
3. Sliding door for aircraft (1), according to claim 2, characterized in that the nut is connected to the door suspension to the upper part of the door (16) by a drag device (18).
4. Sliding door for aircraft (1), according to Petition 870260018122, dated 2 / 26 / 2026, page 24 / 58 2 / 4 claim 3, characterized in that the drag device (18) comprises a drag element, in particular, a drag screw (19), connected to the nut, and a receptacle (22) connected to the door suspension (16).
5. Sliding door for aircraft (1), according to claim 4, characterized in that - the drag element is movably connected to the receptacle (22) in the door suspension (16) in a first direction, parallel to the door leaf (5) and perpendicular to the longitudinal axis of the spindle (13) and / or that - the drag element is movably connected to the receptacle (22) in the door suspension (16) in a second direction, perpendicular to the door leaf (5) and perpendicular to the longitudinal axis of the spindle (13) and / or that - the drag element is fixedly connected to the receptacle (22) in a third direction, parallel to the longitudinal axis of the spindle (13).
6. Sliding door for aircraft (1), according to claim 5, characterized in that the receptacle (22) has a recess (47) in which a support (45) for the drag element is arranged so as to be movable in the first direction and substantially immovable in the third direction, the drag element being arranged in the support (45) so as to be movable in the second direction.
7. Sliding door for aircraft (1), according to any one of claims 1 to 6, characterized in that a device (39) is provided for detecting the torque overload of the electric motor (12), with which a locked state of the door leaf (5) can be verified during the transfer between the closed position and the open position.
8. Sliding door for aircraft (1), according to Petition 870260018122, dated 2 / 26 / 2026, page 25 / 58 3 / 4 any of claims 1 to 7, characterized in that the electric motor (12) is rotatably mounted on the support structure (23) of the drive device (11).
9. Sliding door for aircraft (1), according to claim 8, characterized in that the actuating device (11) has at least one first spring (37), which actuates the electric motor (12) from a first rotated state, in one direction, towards the direction of a neutral position, wherein the actuating device (11) preferably has a second spring (38), which actuates the electric motor (12) from a second rotated state, in another direction, towards the direction of the neutral position.
10. Sliding door for aircraft (1), according to any one of claims 7 to 9, characterized in that the device (39) for detecting the excess torque of the electric motor (12) comprises a sensor (40), which detects a rotation of the electric motor (12) due to torque overload.
11. Sliding door for aircraft (1), according to claim 10, characterized in that the device (39) for detecting the excess torque of the electric motor (12) comprises an actuating element (41) connected in a rotationally fixed manner to the electric motor (12), which actuates the sensor (40) when the electric motor (12) is rotated due to excess torque.
12. Sliding door for aircraft (1), according to any one of claims 7 to 11, characterized in that the drive device (11) comprises a control unit (42), which switches the electric motor (12) to a de-energized state when a blocked state of the door leaf (5) is detected.
13. Sliding door for aircraft (1), according to any one of claims 1 to 12, characterized in that the spindle (13) comprises a gear ratio whereby a complete rotation of a spindle (13) causes the door leaf (5) to move in the closing and opening directions respectively by less than 30 mm, particularly from 5 mm to 15 mm.
14. Sliding door for aircraft (1), according to any one of claims 1 to 13, characterized in that a first limit switch (43) is provided to detect the open position of the door leaf (5) and a second limit switch (44) is provided to detect the closed position of the door leaf (5).
15. Aircraft, characterized in that it comprises: an interior with a first space area and a second space area, a sliding aircraft door (1), as defined in any one of claims 1 to 14, which is disposed between the first space area and the second space area, in the interior. Petition 870260018122, dated 26 / 02 / 2026, p. 27 / 58