Propeller tilt device for air traffic systems

Abstract

A propeller tilting device of an air traffic system can include a guide bracket configured to extend in a forward direction and a rearward direction, a sliding mechanism provided in the guide bracket to be slidable in the forward direction and the rearward direction, and including a driving motor configured to generate a rotational force, and a power conversion unit connected to the guide bracket and configured to convert the rotational force of the driving motor into a linear motion of the sliding mechanism, and a tilting mechanism engaged with the power conversion unit to move together with the sliding mechanism, and including a propeller motor configured to tilt in an upward direction and a downward direction, and an angle conversion unit connected to the propeller motor and the power conversion unit to tilt the propeller motor using the rotational force transmitted from the power conversion unit.

Description

TECHNICAL FIELD

[0001] The present application relates to a propeller tilting device for an air mobility system, and more particularly, to a propeller tilting device for an air mobility system to tilt a propeller according to a flight mode of an aircraft fuselage. BACKGROUND

[0002] Recently, air mobility systems are in development and are applied in various fields, such as cargo containers, medical transport, etc., and methods for improving the energy efficiency and stability of air mobility systems have been developed and implemented in actual processes.

[0003] Such an air mobility system refers to an air transport system that flies by changing the direction of a propeller and thereby vertically takes off and lands. A propeller for an air mobility system is configured to tilt according to a flight mode of an aircraft fuselage, and thus the angle of the propeller is changed, allowing the aircraft to vertically take off and land while hovering in the air, and to fly forward while cruising. However, when the propeller is converted to a horizontal state in air hovering, the propeller thus interferes with the wings or aircraft components such as a boom, causing a loss of thrust due to propeller rotation. In order to solve the existing problem, the propeller is configured to be spaced apart from the fuselage of the aircraft, but in an emergency, the unnecessary long distance between the propeller and the aircraft fuselage can cause additional problems.

[0004] The information disclosed in the background of the present application is only to enhance the understanding of the general background of the present application, and cannot be considered as recognizing or implying in any form that the information forms the prior art known to those skilled in the art. SUMMARY

[0005] Various aspects of the present application are directed to providing a propeller tilting device for an air mobility system that uses one motor to simultaneously perform linear movement of a propeller in a forward direction and a rearward direction and a change in the angle of the propeller according to a flight mode, to achieve a simplification of the structure, and to reduce a loss of thrust in the propeller position.

[0006] According to various aspects of the present application, the above and other objects can be achieved by providing a propeller tilting device of an aerial traffic system, including a guide bracket configured to extend in a forward direction and a rearward direction, a sliding mechanism provided within the guide bracket to be movable in the forward direction and the rearward direction, and the sliding mechanism including a driving motor configured to generate a rotational force, and a power conversion unit connected to the guide bracket and configured to convert the rotational force of the driving motor into a linear motion; and the propeller tilting device including a tilting mechanism coupled to the power conversion unit to move together with the sliding mechanism, and the tilting mechanism including a propeller motor configured to tilt in an upward direction and a downward direction, and an angle conversion unit connected to the propeller motor and the power conversion unit to tilt the propeller motor using the rotational force transmitted from the power conversion unit.

[0007] A guide rail extending in the forward direction and the rearward direction can be provided in the guide bracket, and the driving motor of the sliding mechanism can be installed on the guide rail to be slidable along the guide rail, and can be movable along the guide rail.

[0008] The power conversion unit can include nut portions fixed to the guide bracket, and a screw portion extending from the driving motor along the guide bracket to pass through the nut portions and then connected to the angle conversion unit.

[0009] The tilting mechanism can further include a movable bracket provided on the guide bracket by the angle conversion unit connected to the power conversion unit to move linearly in the forward direction and the rearward direction, and a tilting bracket configured such that the propeller motor is installed thereon and the tilting bracket is provided on the movable bracket by the angle conversion unit to change an angle of the tilting bracket.

[0010] A guide rod configured to extend in the forward direction and the rearward direction can be provided at a side of the guide bracket, and the movable bracket can be installed on the guide rod to slide along the guide rod.

[0011] A width of the movable bracket in a lateral direction is greater than a width of the guide bracket in the lateral direction, so that when the movable bracket moves in the forward direction, the movable bracket can be spaced apart from the guide bracket, and when the movable bracket moves in the rearward direction, the movable bracket can be inserted into the guide bracket to overlap with the guide bracket.

[0012] The angle conversion unit can include a worm rotated by the rotational force transmitted from the power conversion unit, and a worm wheel configured to be engaged with the worm, and when the worm wheel is rotated due to the rotation of the worm, the worm wheel is coupled to the tilting bracket to change an angle of the tilting bracket.

[0013] The worm can be rotatably disposed on the movable bracket and coupled to the power conversion unit to rotate simultaneously with the power conversion unit.

[0014] The central shaft extending from the central portion of the worm gear is configured to pass through the tilting bracket and be integrally coupled to the tilting bracket, and the central shaft can pass through the movable bracket and be rotatably mounted to the movable bracket.

[0015] In a state in which the worm gear is positioned on the worm, the worm gear can be engaged with the worm.

[0016] The tilting mechanism can be configured such that, when the sliding mechanism is inserted into the guide bracket, the propeller motor is arranged vertically, and when the sliding mechanism is withdrawn from the guide bracket, the propeller motor is arranged horizontally, so that the direction of the thrust force generated by the operation of the propeller motor can be changed.

[0017] The guide bracket can be provided on a wing of an aircraft fuselage, the propeller including a plurality of propeller blades can be provided on the propeller motor, and the propeller of the tilting mechanism can be configured to be spaced apart from the wing of the aircraft fuselage when the sliding mechanism is withdrawn from the guide bracket.

[0018] The methods and apparatuses of the present application have other features and advantages which will be apparent from or that will be more readily apparent from the accompanying drawings and the following detailed description of the application, it being understood that both the drawings and the detailed description are provided by way of explanation only and are not intended to limit the application BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a view exemplarily illustrating an aircraft according to various exemplary embodiments of the present application;

[0020] Figure 2 and Figure 3 is a view exemplarily illustrating a propeller tilting apparatus of an air traffic system according to various embodiments of the present application;

[0021] Figure 4 is an exploded perspective view of the propeller tilting apparatus of the air traffic system shown in Figure 2 ;

[0022] Figure 5 is a perspective view exemplarily illustrating a tilting mechanism of the propeller tilting apparatus of the air traffic system shown in Figure 2 ;

[0023] Figure 6 and Figure 7 is a view exemplarily illustrating an operating state of the propeller tilting apparatus of the air traffic system shown in Figure 2 ;

[0024] It is to be understood that the drawings are not necessarily to scale as the emphasis lies in the principles of the application. As included in the description herein, particular design features of the application, including, for example, particular dimensions, orientations, locations and shapes, will be determined in part by the particular intended application and use environment.

[0025] In the drawings, like reference numerals refer to like parts throughout the various views of the drawings. DETAILED DESCRIPTION

[0026] Reference will now be made in detail to various embodiments of the application, examples of which are illustrated in the accompanying drawings and described below. While the application will be described in conjunction with the exemplary embodiments, it will be understood that the description is not intended to limit the application to those exemplary embodiments. On the contrary, the application is intended to cover alternatives, modifications, equivalents and other embodiments, which can be included within the spirit and scope of the application as defined by the appended claims.

[0027] Exemplary embodiments of the application will be described in detail with reference to examples shown in the drawings. Wherever possible, the same reference numbers are used in the drawings to refer to the same or like parts throughout the several views of the drawings.

[0028] In the following, a propeller tilting device of an air traffic system will be described in accordance with various exemplary embodiments of the application and with reference to the accompanying drawings.

[0029] Figure 1 is a view exemplarily illustrating an aircraft according to various exemplary embodiments of the application, Figure 2 and Figure 3 is an exemplary view illustrating a propeller tilting device of an air traffic system according to various exemplary embodiments of the application, Figure 4 is an exploded perspective view of the propeller tilting device of an air traffic system shown in Figure 2 is a perspective view exemplarily illustrating a tilting mechanism of the propeller tilting device of an air traffic system shown in Figure 5 is a view exemplarily illustrating Figure 2 is a perspective view exemplarily illustrating a tilting mechanism of the propeller tilting device of an air traffic system shown in Figure 6 and Figure 7 is a view exemplarily illustrating Figure 2 the propeller tilting device of an air traffic system shown in

[0030] A propeller tilting device of an air traffic system according to various exemplary embodiments of the application, as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the apparatus includes a guide bracket 100 configured to extend in a forward direction and a rearward direction, a sliding mechanism 200 disposed in the guide bracket 100 to be movable in the forward direction and the rearward direction, and the sliding mechanism includes a driving motor 210 configured to generate a rotational force and a power conversion unit 220 connected to the guide bracket 100, the power conversion unit being configured to convert the rotational force of the driving motor 210 into a linear motion, and an inclination mechanism 300 connected to the power conversion unit 220 to move together with the sliding mechanism 200, and the inclination mechanism includes a propeller motor 331 configured to be inclined in an upward direction and a downward direction, and an angle conversion unit 310 connected to the propeller motor 331 and the power conversion unit 220 to incline the propeller motor 331 using the rotational force transmitted from the power conversion unit 220.

[0031] The aircraft fuselage M is configured to take off and land vertically, and when the aircraft flies at a high speed, the aircraft fuselage can configure the wings W to generate lift, and the guide bracket 100 can be disposed on each of the wings W. The guide bracket 100 can be disposed on the aircraft fuselage M or other parts such as a tail boom, and can also be disposed on the wings W of the aircraft fuselage M.

[0032] The sliding mechanism 200 includes a driving motor 210 configured to generate a rotational force and a power conversion unit 220 provided in the guide bracket 100, the power conversion unit being configured to convert the rotational force of the driving motor 210 into a linear motion. Here, a guide rail 110 extending in a forward direction and a rearward direction is provided in the guide bracket 100, and the driving motor 210 of the sliding mechanism 200 is mountable on the guide rail 110 to be slidable or movable along the guide rail 110. The guide rail 110 extends in the forward direction and the rearward direction along the guide bracket 100, and the driving motor 210 is provided on the guide rail 110 by a slider 211, thereby moving in the forward direction and the rearward direction along the guide rail 110. The power conversion unit 220 is connected to the driving motor 210, so the sliding mechanism 200 can be linearly moved by the rotational force of the driving motor 210. More specifically, the power conversion unit 220 can include a plurality of nut portions 221 fixed to the guide bracket 100, and a screw portion 222 configured to extend from the driving motor 210 along the guide bracket 100 through the nut portions 221 to be connected to the angle conversion unit 310. Accordingly, the power conversion unit 220 includes the nut portions 221 fixed to the guide bracket 100 and the screw portion 222 extending from the driving motor 210 and disposed to pass through the nut portions 221. Accordingly, when the driving motor 210 is operated, thereby the screw portion 222 is rotated, the screw portion 222 connected to the nut portions 221 reciprocates in the forward direction and the rearward direction, so the entire sliding mechanism 200 including the driving motor 210 can be moved. Further, because the angle conversion unit 310 is connected to the screw portion 222, the tilting mechanism 300 including the angle conversion unit 310 is also moved in the forward direction and the rearward direction according to the movement of the screw portion 222.

[0033] The tilting mechanism 300 is connected to the screw portion 222 of the power conversion unit 220 to move in the forward direction and the rearward direction, and includes a propeller motor 331 configured to tilt in the upward direction and the downward direction, and an angle conversion unit 310 connected to the propeller motor 331 and the power conversion unit 220 to tilt the propeller motor 331 using the rotational force transmitted from the power conversion unit 220. Here, a propeller including a plurality of propeller blades 331a is provided on the propeller motor 331 to generate a thrust force when the propeller rotates, and the angle conversion unit 310 adjusts the tilting angle of the propeller motor 331 using the rotational force transmitted from the power conversion unit 220. The angle conversion unit 310 is connected to the power conversion unit 220, so that the angle conversion unit 310 and the power conversion unit 220 are simultaneously operated by the rotational force generated by the driving motor 210. That is, when the driving motor 210 of the sliding mechanism 200 is operated, the power conversion unit 220 converts the rotational force of the driving motor 210 into a linear motion to move the sliding mechanism 200 in the forward direction and the rearward direction, and when the tilting mechanism 300 moves together with the sliding mechanism 200, the angle conversion unit 310 tilts the propeller motor 331 using the rotational force transmitted from the power conversion unit 220. Therefore, when the driving motor 210 is operated, the sliding mechanism 200 and the tilting mechanism 300 are simultaneously operated, and the linear motion and the tilting angle adjustment of the propeller motor 331 are simultaneously performed through the interrelation between the sliding mechanism 200 and the tilting mechanism 300.

[0034] The tilting mechanism 300 will be described in more detail. As shown in FIG. 3, the tilting mechanism 300 includes a movable bracket 320 provided on the guide bracket 100 by the angle conversion unit 310 connected to the power conversion unit 220 to linearly move in the forward direction and the rearward direction, and a tilting bracket 330 configured such that the propeller motor 331 is mounted thereto and is provided on the movable bracket 320 by the angle conversion unit 310 to change the angle of the tilting bracket 330. Figure 4 Figure 5 As shown, the tilting mechanism 300 further includes the movable bracket 320 provided on the guide bracket 100 by the angle conversion unit 310 connected to the power conversion unit 220 to linearly move in the forward direction and the rearward direction, and the tilting bracket 330 configured such that the propeller motor 331 is mounted thereto and is provided on the movable bracket 320 by the angle conversion unit 310 to change the angle of the tilting bracket 330.

[0035] That is, the movable bracket 320 is connected to the power conversion unit 220 by the angle conversion unit 310, so that the movable bracket and the sliding mechanism 200 move together in the forward direction and the rearward direction when the sliding mechanism 200 linearly moves. The tilting bracket 330 is configured such that the propeller motor 331 is mounted thereto and is provided on the movable bracket 320 by the angle conversion unit 310. Therefore, the tilting bracket 330 and the movable bracket 320 linearly move together in the forward direction and the rearward direction while the angle of the tilting bracket 330 is changed by the angle conversion unit 310, so that the position of the propeller motor 331 is changed when the movable bracket 320 linearly moves. ​

[0036] In more detail, guide rods 120 are provided at the side of the guide bracket 100, the guide rods are configured to extend in the forward direction and the rearward direction, and the movable bracket 320 is installed on the guide rods 120 to be slidable therealong. The guide rods 120 extend in the forward direction and the rearward direction along the guide bracket 100, and the movable bracket 320 is provided on the guide rods 120 by a slider S, and thus can move in the forward direction and the rearward direction along the guide rods 120. The slider S can be fixed to the movable bracket 320, and can be provided on the bracket as an angle conversion unit 310.

[0037] The width of the movable bracket 320 in the lateral direction is greater than the width of the guide bracket 100 in the lateral direction, and thus when the movable bracket 320 moves in the forward direction, the movable bracket 320 can be spaced apart from the guide bracket 100, and when the movable bracket 320 moves in the rearward direction, the movable bracket can be inserted into the guide bracket 100 to overlap the guide bracket 100. Thus, when the movable bracket 320 moves forward or rearward with respect to the guide bracket 100, interference between the movable bracket 320 and the guide bracket 100 can be avoided. In addition, as shown in FIG. 2, when the movable bracket 320 moves rearward, the movable bracket 320 is inserted into the guide bracket 100 to overlap the guide bracket 100, and thus the support rigidity is ensured due to contact between the movable bracket 320 and the guide bracket 100. Figure 3

[0038] The angle conversion unit 310 includes a worm 311 configured to rotate by the rotational force transmitted from the power conversion unit 220, and a worm wheel 312 configured to be engaged with the worm 311, and the worm wheel is coupled to the tilt bracket 330, such that when the worm wheel 312 rotates due to the rotation of the worm 311, the worm wheel changes the angle of the tilt bracket 330.

[0039] Here, the worm 311 is connected to one end portion of the screw portion 222 of the power conversion unit 220, and thus the worm and the screw portion 222 rotate together, and the worm wheel 312 is coupled to the tilt bracket 330 and is rotatably installed on the movable bracket 320 to be engaged with the worm 311. Thus, when the worm 311 rotates with the rotational force generated by the operation of the driving motor 210 and transmitted from the power conversion unit 220, the tilt angle of the tilt bracket 330 on which the propeller motor 331 is installed can be changed due to the rotation of the worm wheel 312 engaged with the worm 311. Here, when the sliding mechanism 200 is completely slid in the forward direction and the rearward direction, the gear teeth of the worm 311 and the gear teeth of the worm wheel 312 can be configured such that the tilt angle of the tilt bracket 330 becomes 90 degrees.

[0040] ​Furthermore, the worm gear 311 is rotatably mounted on the movable support 320 and connected to the power conversion unit 220, thus allowing it to rotate simultaneously with the power conversion unit 220. That is, the worm gear 311 can be mounted on the movable support 320 via the aforementioned slider S. Therefore, the worm gear 311 is connected to the power conversion unit 220, so it rotates simultaneously with the power conversion unit 220 and moves forward and backward together with the sliding mechanism 200. Furthermore, the worm gear 311 is mounted on the movable support 320 via the slider S to move forward and backward together with the movable support 320, and the rotatable mounting of the worm gear on the slider S ensures smooth execution of the worm gear 311's rotational movement.

[0041] Furthermore, a central shaft 312a extending from the center portion of the worm gear 312 is configured to pass through the tilting bracket 330 and be integrally connected to the tilting bracket 330, and the central shaft 312a is configured to pass through the movable bracket 320 and be rotatably mounted on the movable bracket 320. That is, because the central shaft 312a of the worm gear 312 is configured to pass through the tilting bracket 330 and be integrally connected to the tilting bracket 330, the worm gear 312 and the tilting bracket 330 can rotate together, and because the central shaft 312a of the worm gear 312 is configured to pass through the movable bracket 320 and be rotatably mounted on the movable bracket 320, the tilt of the tilting bracket 330 on which the propeller motor 331 is mounted can be adjusted on the movable bracket 320. Here, the portion of the movable bracket 320 through which the central shaft 312a of the worm gear 312 passes can be mounted on the movable bracket 320 via a bushing H.

[0042] With the worm gear 312 on the worm 311, the worm gear 312 and the worm 311 are engaged, so the tilting bracket 330 connected to the worm gear 312 can tilt smoothly without interfering with the worm 311.

[0043] The tilting mechanism 300 is configured such that the propeller motor 331 is arranged vertically when the sliding mechanism 200 is inserted into the guide bracket 100, and the propeller motor 331 is arranged horizontally when the sliding mechanism 200 is removed from the guide bracket 100, thus changing the direction of the thrust generated by the operation of the propeller motor 331.

[0044] That is, such as Figure 6 As shown, when the sliding mechanism 200 is inserted into the guide bracket 100, the propeller motor 331 is arranged vertically, so the propeller including the propeller blades 331a enters a state suitable for cruise. When the sliding mechanism 200 is inserted into the guide bracket 100, the propeller including the propeller blades 331a is located adjacent to the wing W, so the thrust generated by the operation of the propeller motor 331 is effectively applied to the wing W and enhances flight performance.

[0045] On the contrary, as Figure 7 shown, when the sliding mechanism 200 is withdrawn from the guide bracket 100, the propeller motor 331 is horizontally arranged, so the propeller including the propeller blade 331a enters a state suitable for air hovering. When the sliding mechanism 200 is withdrawn from the guide bracket 100, the propeller including the propeller blade 331a is located away from the wing W, so the thrust generated by the operation of the propeller motor 331 does not interfere with the wing W and reduces thrust loss.

[0046] Therefore, when the sliding mechanism 200 is withdrawn from the guide bracket 100, the propeller including the propeller blade 331a of the tilting mechanism 300 is spaced apart from the aircraft fuselage M. Therefore, the distance between the propeller including the propeller blade 331a and the wing W can be secured by setting the size of the propeller blade 331 or the withdrawal distance of the sliding mechanism 200. Therefore, when the sliding mechanism 200 is withdrawn from the guide bracket 100, the propeller including the propeller blade 331a is spaced apart from the wing W, so the thrust generated by the rotation of the propeller including the propeller blade 331a is prevented from being lost due to interference with the wing W.

[0047] The propeller tilting device of the air traffic system having the above-described structure simultaneously implements the movement of the sliding mechanism 200 and the tilting operation of the tilting mechanism 300 using one driving motor 210, so the propeller moves forward or backward while changing the angle of the propeller including the propeller blade 331a. Therefore, the structure configured to move the position of the propeller including the propeller blade 331a is simplified, so the thrust loss of the propeller including the propeller blade 331a in the air hovering mode or the cruising mode is prevented.

[0048] As is apparent from the above description, the propeller tilting device of the air traffic system according to various embodiments of the present application simultaneously implements the movement of the sliding mechanism and the tilting of the tilting mechanism using one driving motor, so the propeller moves forward or backward while changing the angle of the propeller. Therefore, the structure configured to move the position of the propeller is simplified, and the thrust loss of the propeller in the air hovering mode or the cruising mode is prevented.

[0049] In an exemplary embodiment of the present application, a controller is connected to the driving motor 210 to control the operation thereof.

[0050] Further, the term control device such as "controller", "control unit", "control means" or "control module" refers to a hardware device including a memory and a processor configured to perform one or more steps interpreted as an algorithmic structure. The memory stores the algorithmic steps, and the processor performs the algorithmic steps to execute one or more processes of the method according to various exemplary embodiments of the present application. The control device according to exemplary embodiments of the present application can be implemented by a non-volatile memory configured to store data for controlling operations of various components of a vehicle or software commands for performing an algorithm, and a processor configured to perform the above operations using the data stored in the memory. The memory and the processor can be separate chips. Alternatively, the memory and the processor can be integrated in a single chip. The processor can be implemented as one or more processors. The processor can include various logic circuits and arithmetic circuits, can process data according to a program provided from the memory, and can generate a control signal according to a processing result.

[0051] The control device can be at least one microprocessor operated by a predetermined program, which can include a series of commands for performing the method disclosed in the aforementioned various exemplary embodiments of the present application.

[0052] The aforementioned application can also be embodied as computer-readable code on a computer-readable recording medium. The computer-readable recording medium is any data storage device that can store data that can be subsequently read by a computer system. Examples of the computer-readable recording medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc., and an implementation as a carrier wave (e.g., transmission over the Internet).

[0053] In exemplary embodiments of the present application, each of the above-described operations can be performed by the control device, and the control device can be configured by a plurality of control devices or an integrated single control device.

[0054] In exemplary embodiments of the present application, the control device can be implemented in the form of hardware or software, or can be implemented in a combination of hardware and software.

[0055] For ease of explanation and to precisely define the claims appended hereto, the terms "upper," "lower," "inner," "outer," "upper," "lower," "upwardly," "downwardly," "front," "rear," "rearward," "interior," "exterior," "inwardly," "outwardly," "internal," "external," "inner," "outer," "forward" and "rearward" are used to describe the features of the example embodiments with reference to the positions shown in the drawings. It will further be understood that the terms "connected" or "coupled" or their derivatives as used herein, refer to any connection or coupling, either direct or indirect.

[0056] The foregoing description of specific example embodiments of the application has been presented for the purposes of illustration and description. They are not intended to be exhaustive or to limit the application to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The example embodiments were chosen and described in order to explain certain principles of the application and their practical application to thereby enable others skilled in the art to make and utilize various example embodiments of the present application, as well as various alternatives and modifications thereof. It is intended that the scope of the application be defined by the claims appended hereto, and their equivalents.

Claims

1. A propeller tilting device of an air traffic system, the propeller tilting device comprising: a guide bracket; a sliding mechanism provided in the guide bracket to be movable in a forward direction and a rearward direction of the guide bracket, and the sliding mechanism comprising: a driving motor configured to generate a rotational force; and a power conversion unit connected to the guide bracket and engaged with the driving motor, and configured to convert the rotational force of the driving motor into a linear motion of the sliding mechanism; and the propeller tilting device comprising: a tilting mechanism engaged with the power conversion unit to move with the sliding mechanism, and the tilting mechanism comprising: a propeller motor configured to tilt in a predetermined direction; an angle conversion unit connected to the propeller motor and the power conversion unit to tilt the propeller motor with the rotational force received from the power conversion unit; a movable bracket provided on the guide bracket through the angle conversion unit connected to the power conversion unit to linearly move in a forward direction and a rearward direction; and a tilting bracket on which the propeller motor is installed, wherein the tilting bracket is provided on the movable bracket through the angle conversion unit to change an angle of the tilting bracket. 2.The propeller tilting device of an air traffic system according to claim 1, wherein a guide rail extending in a forward direction and a rearward direction is provided in the guide bracket, and wherein the driving motor of the sliding mechanism is installed on the guide rail to be slidable along the guide rail. 3.The propeller tilting device of an air traffic system according to claim 1, wherein the power conversion unit comprises at least one nut portion fixed to the guide bracket, and a screw portion extending from the driving motor along the guide bracket, and wherein the screw portion is aligned to pass through the at least one nut portion to be engaged to the at least one nut portion, and then the screw portion is connected to the angle conversion unit. 4.The propeller tilting device of an air traffic system according to claim 3, wherein the angle conversion unit comprises: a worm engaged to the screw portion and rotated by the rotational force transmitted from the screw portion of the power conversion unit; and a worm wheel engaged with the worm and connected to a tilting bracket of the tilting mechanism, such that when the worm wheel is rotated as the rotation of the worm rotated by the rotational force transmitted from the power conversion unit, the worm wheel changes an angle of the tilting bracket, wherein the propeller motor is installed on the tilting bracket. 5.The propeller tilting device of an air traffic system according to claim 1, wherein at least one guide rod extending in a forward direction and a rearward direction is provided at a corresponding side of the guide bracket, and wherein the movable bracket is installed on the at least one guide rod to be slidable along the at least one guide rod. 6.The propeller tilting device of an air traffic system according to claim 1, ​ wherein a width of the movable bracket in a transverse direction is greater than a width of the guide bracket in the transverse direction, such that the movable bracket is spaced apart from the guide bracket when the movable bracket moves in a forward direction, and the movable bracket is inserted into the guide bracket to overlap the guide bracket when the movable bracket moves in a rearward direction.

7. The air traffic system propeller tilting device of claim 1, wherein the angle conversion unit comprises: a worm that rotates by a rotational force transmitted from the power conversion unit; and a worm wheel that engages with the worm and is connected to the tilting bracket, such that the worm wheel changes an angle of the tilting bracket when the worm wheel rotates along with rotation of the worm that rotates by the rotational force transmitted from the power conversion unit.

8. The air traffic system propeller tilting device of claim 7, wherein the worm is rotatably disposed on the movable bracket and is coupled to the power conversion unit to rotate along with the power conversion unit.

9. The air traffic system propeller tilting device of claim 8, wherein the power conversion unit comprises at least one nut portion fixed to the guide bracket, and a screw portion that extends from the driving motor along the guide bracket, and wherein the screw portion is aligned to pass through the at least one nut portion to engage to the at least one nut portion, and then the screw portion engages to the worm of the angle conversion unit.

10. The air traffic system propeller tilting device of claim 7, wherein a center shaft extending from a center portion of the worm wheel is disposed to pass through the tilting bracket and is integrally connected to the tilting bracket, and the center shaft is disposed to pass through the movable bracket and is rotatably mounted to the movable bracket.

11. The air traffic system propeller tilting device of claim 7, wherein the worm wheel engages with the worm in a state in which the worm wheel is positioned on the worm.

12. The air traffic system propeller tilting device of claim 1, wherein the tilting mechanism is configured to cause the propeller motor to be arranged in a first direction when the sliding mechanism is inserted into the guide bracket, and to cause the propeller motor to be arranged in a second direction when the sliding mechanism is withdrawn from the guide bracket, and thus a direction of a thrust force generated by an operation of the propeller motor is changed.

13. The air traffic system propeller tilting device of claim 1, wherein the guide bracket is disposed on a wing of an aircraft body, and a propeller comprising a plurality of propeller blades is disposed on the propeller motor; and wherein the propeller of the tilting mechanism is configured to be spaced apart from the wing of the aircraft body when the sliding mechanism is withdrawn from the guide bracket.

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