KR102129368B1 - A drone with adjustable distance between rotors - Google Patents

Abstract

The drone according to an embodiment includes a main body, a plurality of support portions formed to extend outwardly from the main body, and a plurality of propulsion portions provided on the outside of the main body and supported by the support portion, and the plurality of propulsion portions The distance between can be varied.

Description

A drone with adjustable distance between rotors {A DRONE WITH ADJUSTABLE DISTANCE BETWEEN ROTORS}

The following embodiments relate to drones capable of adjusting the distance between rotors.

The drone started in the military industry refers to an airplane or a helicopter-shaped vehicle that is flying by induction of radio waves without a human being riding. Recently, the drone is widely used in military and commercial use, and research on it has been actively conducted. Is going on.

In particular, drones with excellent detection capabilities and rapid mobility using cameras and sensors are being used in various fields such as transportation, security, surveillance, and observation.

As an example of the above, a US shopping mall company is planning to build a logistics delivery system using a drone, and public relations are being made.

The drone is made of various types according to the purpose of use, such as a fixed wing, a rotary wing, and a composite type.

The fixed wing is a drone that uses the lift generated by the wing of a fixed wing like a general aircraft to fly, which was presented in U.S. Patent Publication No. 2012-0061508 (Device for Firing Weapons from an Armed Drone, March 15, 2012). .

The rotor blades fly using a force generated from a rotating blade, and the complex type refers to a tilt-rotor drone (drone) or the like using the principle of the stator blades and the rotor blades.

However, a general drone has a problem in that a part of the body is inclined when the speed is increased in order to move in a desired direction through control of a propulsion device when changing a direction to be in flight.

In other words, a general drone performs movements such as rolling, pitching, and yawing, which inclines the direction of the body toward a destination, which inclines the cargo mounted on the body of the drone. In addition to the possibility of damage or loss, there is a problem that a flight control inability situation may occur due to a change in the center of gravity of the drone.

In addition, a conventional drone has a problem in that a drone having a propellant capable of flying can be formed separately according to the weight of a mounted load and a cargo to be transported.

That is, conventional drones form drones of various types and types according to the purpose of use or the weight of the cargo to be transported, which has a problem in that there is a limitation in the range of use, and thus the efficiency of the drone is poor. .

On the other hand, drones are expected to increase the amount of traffic flying over the drones due to the increasing demand for drones, thereby increasing the possibility of collisions and collisions during drones' flight. In addition, there is a need for a protection device or a landing device for protecting main devices such as a camera and a propeller provided in the drone.

In addition, currently commercialized landing lands can be vulnerable to meteorological conditions (snow, rain, etc.) when exposed to the ground, and in many cases, when storing and moving drones, it is often necessary to separate and store major parts.

An object according to an embodiment is to provide a drone capable of optimizing aerodynamic performance by adjusting a distance between rotors according to a mission type.

An object according to an embodiment is to provide a drone capable of providing an appropriate lifting force according to a surrounding environment and a mission type in consideration of a ground effect, a ceiling effect, or a wall effect.

The drone according to an embodiment includes a main body, a plurality of support portions formed to extend outwardly from the main body, and a plurality of propulsion portions provided on the outside of the main body and supported by the support portion, and the plurality of propulsion portions The distance between can be varied.

The support part includes a plurality of support bars extending toward the outside with respect to the main body, and a plurality of drive shafts provided inside the plurality of support bars and moved back and forth with respect to the outside of the main body. The plurality of propulsion units may be disposed at one end of each of the drive shafts.

At this time, the other ends of the plurality of drive shafts are extended to the inside of the main body and connected to a linear actuator, and the plurality of drive shafts may be moved back and forth by operation of the linear actuator.

Alternatively, the drone further includes a gear member provided inside the body, and the other end of the drive shaft extends inside the body and is connected to the gear member, and the plurality of drive shafts are driven by the rotational force of the gear member. Can be moved back and forth.

Each of the plurality of propulsion units includes a motor that provides rotational force and a rotor that rotates with a rotational force provided by the motor.

When the total length of the rotor is D, the shortest distance from the radius of rotation of the first rotor to the radius of rotation of the second rotor adjacent to the first rotor may be between 0.06D and 0.6D.

At this time, the total length D of the rotor may be 76 mm.

In addition, the drone may further include a control unit that controls the distance between the rotational radii between the plurality of rotors.

The drone according to an embodiment may optimize aerodynamic performance by adjusting a distance between rotors according to a mission type.

The drone according to an embodiment may have an appropriate lifting force according to the surrounding environment and mission type in consideration of the ground effect, ceiling effect, or wall effect.

1 is a perspective view of a drone according to an embodiment.
2 is a cross-sectional view of a drone according to an embodiment.
Figure 3 shows a state in which the distance between the rotor of the drone according to an embodiment is adjusted.
Figure 4 shows the lift that varies with the change in the distance between the rotor of the drone according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The following description is one of several aspects of the embodiments, and the following description forms part of a detailed description of the embodiment.

However, in describing one embodiment, a detailed description of known functions or configurations will be omitted to clarify the gist of the present invention.

In addition, the terms or words used in the specification and claims should not be interpreted in a conventional or lexical sense, and the inventor is the best

Based on the principle that the concept of a term can be properly defined to explain in a method, it should be interpreted as a meaning and a concept corresponding to the technical idea of a drone according to an embodiment.

Therefore, the embodiments shown in the embodiments and the drawings described in this specification are only the most preferred embodiment of the drone according to one embodiment, and do not represent all technical ideas of the drone according to one embodiment, and thus the present application It should be understood that there may be a variety of equivalents and variations that can replace them at a point in time.

1 is a perspective view of a drone according to an embodiment, and FIG. 2 is a cross-sectional view of a drone according to an embodiment. 3 shows a state in which the distance between rotors of a drone according to an embodiment is adjusted, and FIG. 4 shows a lift force varying according to a change in distance between rotors of a drone according to an embodiment.

Referring to Figure 1, the drone 10 according to an embodiment is provided on the outer side of the main body 100, a plurality of support parts 200 formed to extend outwardly from the main body 100 and the main body 100 It includes a plurality of propulsion unit 300 supported by (200), the distance between the plurality of propulsion unit 300 may be changed.

At this time, the main body 100 may be formed in a cylindrical shape. However, the present invention is not limited thereto, and may be formed in any shape, such as a hexahedral shape, a triangular prism shape, and an octahedron shape, if necessary.

In addition, the propulsion unit 300 generates thrust to perform the operation (flight, takeoff/landing) of the drone 10.

Here, the support part 200 may include a plurality of support bars 210 extending toward the outside with respect to the main body 100. For example, two support bars 210 may be provided in both directions toward the outside with respect to the main body 100. Alternatively, four may be provided in a diagonal direction around the main body 100. However, the present invention is not limited thereto, and it is obvious that the support bar may be provided in a number as necessary.

In addition, the support part 200 is provided on the inner side of each support bar 210 in a number corresponding to the support bar 210, and a plurality of drive shafts 220 that can be moved back and forth relative to the outside of the main body 100 It may include. At this time, a plurality of propulsion units 300 may be disposed at one end of each of the plurality of drive shafts 220.

Each of the plurality of propulsion units 300 includes a motor 310 that provides rotational force and a rotor 320 that rotates with the rotational force provided by the motor 310.

At this time, the propulsion unit 300 is a propeller method using thrust generated by the rotation of a propeller that is widely used for drones, but it is possible to implement various propulsion units such as a jet engine in addition to the propeller method, so it is limited to the propeller method I never do that.

In addition, the drone 10 may further include a control unit (not shown) that controls the distance between the rotational radii between the plurality of rotors 320 by moving the plurality of drive shafts 220 forward and backward.

In addition, the drone may further include a protection unit (not shown) provided on the outside of the propulsion unit to protect the propulsion unit from an external barrier or obstacle, and the protection unit is connected to the propulsion unit to move the propulsion unit If possible, they can be moved together.

Referring to FIG. 2, the other ends of the plurality of drive shafts 220 are extended to the inside of the main body and connected to the linear actuator 400, and the plurality of drive shafts 220 are moved back and forth by the operation of the linear actuator 400. Can.

Alternatively, the drone further includes a gear member (not shown) provided inside the main body, and the other end of the drive shaft extends inside the main body and is connected to the gear member, and a plurality of drive shafts are moved forward and backward by the rotational force of the gear member. Can be moved.

Alternatively, the drone may have a plurality of components (shaft elements) superimposed on each drive shaft so that the length of the drive shaft may contract or expand, and the length of the drive shaft may be entirely controlled by the controller. . That is, each drive shaft may be formed in a shape in which a plurality of hollow shafts having hollows having different sizes overlap each other. In addition, the control unit may adjust the overall length of the drive shaft by changing the length of the overlapping portion between the plurality of hollow shafts.

Thus, as the length of the drive shaft changes, the propulsion portion may be moved outward of the drone or returned in a direction toward the body of the drone.

The drone 10 having the above-described configuration may be operated as shown in FIG. 3. That is, as shown in Figure 3 (a), when the drive shaft 220 is completely inserted into the inside of the jizaba 210, the shortest distance between the plurality of propulsion parts 300 is the shortest, as shown in Figure 3 (b) , When the drive shaft 220 is completely moved to the outside of the support bar 210, the shortest distance between the plurality of propulsion units 300 may be formed to be the longest.

The shortest distance between the propulsion units 300 may be adjusted by the control unit to suit the flight situation.

Referring to (a) of FIG. 4, when the total length of the rotor 320 of the propulsion unit 300 is set to D, the first rotor 321 is adjacent to the first rotor 321 from the rotation radius of the first rotor 321. 2, the shortest distance to the turning radius of the rotor 322 may be between 0.06D and 0.6D.

At this time, the total length D of the rotor 320 may be appropriately 76 mm.

As shown in FIG. 4(b), in the case of a quadrotor-type drone composed of four propulsion units, in particular, the lift force among the aerodynamic performances varies considerably depending on the distance between each rotor. That is, by changing the distance between the rotors, it is possible to change the interaction of the wakes of each rotor. Accordingly, the lift force acting on the drone can be significantly changed. Therefore, flight efficiency can be maximized by adjusting the distance between the rotors to have optimal lift when performing the mission of the drone in consideration of the ground effect, ceiling effect, and wall effect according to the flight situation.

The drone according to the embodiment having the above-described configuration can optimize the aerodynamic performance by adjusting the distance between the rotors according to the mission type.

In addition, the drone may be provided with an appropriate lifting force according to the surrounding environment and mission type in consideration of the ground effect, ceiling effect, or wall effect.

As described above, in the embodiments, the embodiments have been described by specific matters such as specific components, etc., and with limited embodiments and drawings, which are provided for overall understanding. In addition, the present invention is not limited to the above-described embodiments, and those skilled in the art to which the present invention pertains can make various modifications and variations from these descriptions. Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and it will be said that not only the claims described below, but also all those with equivalent or equivalent modifications to the claims fall within the scope of the spirit of the present invention.

10: drone
100: main body
200: support
210: support bar
220: drive shaft
300: propulsion unit
310: motor
320: rotor
400: linear actuator

Claims (8)

main body;
A plurality of support portions formed to extend outward from the main body; And
A plurality of propulsion units provided outside the main body and supported by the support unit;
Including,
The distance between the plurality of propulsion units may be changed,
Each of the plurality of propulsion units,
A motor providing rotational force; And
A rotor rotated with a rotational force provided by the motor;
Including,
When the total length of the rotor is D,
The drone is the shortest distance between 0.06D and 0.6D, from the radius of rotation of the first rotor to the radius of rotation of the second rotor adjacent to the first rotor.
According to claim 1,
The support portion,
A plurality of support bars extending toward the outside with respect to the main body; And
A plurality of drive shafts provided inside the plurality of support bars and moving forward and backward with respect to the outside of the main body;
Including,
A drone in which each of the plurality of driving parts is disposed at one end of each of the plurality of drive shafts.
According to claim 2,
The other ends of the plurality of drive shafts are extended to the inside of the main body and connected to a linear actuator,
A drone in which the plurality of drive shafts are moved back and forth by the operation of the linear actuator.
According to claim 2,
A gear member provided inside the body;
Further comprising,
The other end of the drive shaft is extended to the inside of the body and connected to the gear member, the plurality of drive shafts are moved forward and backward by the rotational force of the gear member, the drone.
delete delete According to claim 1,
The total length D of the rotor is 76 mm, drone.
According to claim 1,
A control unit for controlling the distance between the turning radii between the plurality of rotors;
Drone, which further includes.

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