A four-rotor drone with foldable arms

Abstract

The present invention provides a quad-rotor drone with foldable arms, comprising: a fuselage, the surface of which is square; four arms, respectively connected to the four sides of the fuselage, and connected to the fuselage through springs and hinges; and a propeller, mounted on the arm, consisting of a motor bracket, a motor fixed on the motor bracket, and a blade connected to the motor. The present invention has a simple structure, and can realize the function of folding the arms and deforming them during the flight of the drone without an additional driver, and the deformation effect is good. It can also pass through narrow spaces that cannot be passed by existing generally non-deformable quad-rotor aircraft, and can also retain the advantages of long endurance, large load, and high stability, and can play an important role in rescue, survey and other tasks.

Description

Technical Field

[0001] The invention belongs to the technical field of unmanned aerial vehicles, and in particular relates to a four-rotor unmanned aerial vehicle with foldable arms. Background Art

[0002] Unmanned aerial vehicles, or UAVs, are aircraft that are controlled by radio remote control equipment and self-contained program control devices, or are operated completely or intermittently autonomously by an onboard computer. UAVs are currently used in a wide range of fields, and are widely used in both military and civilian applications. In the military, UAVs are divided into reconnaissance aircraft and target aircraft. In the civilian field, UAVs are currently widely used in aerial photography, agriculture, plant protection, micro selfies, express delivery, disaster relief, wildlife observation, infectious disease monitoring, surveying and mapping, news reporting, power inspections, and film and television shooting.

[0003] In some operational tasks, such as disaster relief, military reconnaissance, and scientific surveys, due to the complex environment, UAVs will face the challenge of passing through narrow terrain during the operation. Also, because the above operational tasks also have high requirements on the UAV's endurance, load stability and other functions, it is not advisable to simply reduce the size of the UAV to improve its flexibility. Summary of the invention

[0004] The present invention is made to solve the above-mentioned problem, and its purpose is to provide a quad-rotor drone with foldable arms.

[0005] The present invention provides a four-rotor drone with foldable arms, which has the following characteristics: a fuselage with a square surface; four arms, which are respectively connected to the four sides of the fuselage and are connected to the fuselage through springs and hinges; and a propeller, which is installed on the arm and consists of a motor bracket, a motor fixed on the motor bracket, and a blade connected to the motor.

[0006] The quad-rotor drone with foldable arms provided by the present invention may also have the following feature: wherein the propeller is a ducted propeller.

[0007] The quad-rotor drone with foldable arms provided by the present invention may also have the following feature: wherein the bracket is composed of two cross-shaped beams that are perpendicular to each other.

[0008] Functions and Effects of the Invention

[0009] According to the quad-rotor drone with foldable arms involved in the present invention, since the arms and the fuselage are connected by springs and hinges, the extension and retraction of the springs and the flipping of the hinges can be controlled by controlling the thrust of the propeller, thereby controlling the folding and unfolding of the arms; since the propeller is composed of a motor bracket, a motor and blades, the motor can autonomously drive the blades to rotate without the need for an additional driver, thus saving costs.

[0010] Therefore, the four-rotor drone with foldable arms of the present invention has a simple structure, and can realize the function of folding the arms and deforming them during the flight of the drone without an additional driver, and the deformation effect is good. In addition, the time required for the opening and closing deformation of the arms is short, and the size of the arms after folding is reduced by 50% relative to the size of the arms when they are extended, so that the volume is reduced, so that it can pass through narrow spaces that cannot be passed by existing generally non-deformable four-rotor drones, and can also retain the advantages of long endurance, large load, and high stability, and can play an important role in rescue, survey and other tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 2 is a schematic diagram of the structure of a quad-rotor drone with foldable arms according to an embodiment of the present invention;

[0012] Figure 2 It is a structural side view of a quad-rotor drone with foldable arms in an embodiment of the present invention. DETAILED DESCRIPTION

[0013] In order to make the technical means and effects achieved by the present invention easier to understand, the present invention is described in detail below in conjunction with embodiments and drawings.

[0014] Example:

[0015] Figure 1 2 is a schematic diagram of the structure of a quad-rotor drone with foldable arms according to an embodiment of the present invention. Figure 2 It is a structural side view of a quad-rotor drone with foldable arms in an embodiment of the present invention.

[0016] like Figure 1 and Figure 2 As shown, a quad-rotor drone 100 with foldable arms in this embodiment includes: a fuselage 10, an arm 20 and a propeller 30.

[0017] The surface of the body 10 is in a square shape.

[0018] There are four arms 20, which are respectively connected to the four sides of the fuselage 10 and are symmetrical about the center of the fuselage 10, and are connected to the fuselage 10 through springs 40 and hinges 50. When the propeller 30 stops running, the spring 40 and the hinge 50 pull the arm 10 to a vertical position. When the propeller 30 starts and the thrust of the propeller 30 exceeds the tension of the spring 40, the arm 10 will unfold again.

[0019] The surface of the arm 20 is square, and the side length is the same as the side length of the surface of the body 10. When the arm 20 is folded, the size is equivalent to half of the arm 20 when it is extended, that is, the size is reduced by 50%.

[0020] The hinge 50 is arranged at the connection between the fuselage 10 and the arm 20. Under the expansion and contraction of the spring 40 and the flipping of the hinge 50, the arm 20 can be flipped under the thrust of the propeller 30, thereby completing the folding and unfolding of the arm 20.

[0021] The propeller 30 is mounted on the machine arm 10 and is composed of a motor bracket 301, a motor (not shown in the figure) fixed on the motor bracket 301, and a blade 302 connected to the motor. The rotation of the blade 302 is driven by the motor.

[0022] In this embodiment, the propeller 30 is a ducted propeller, and the bracket 301 is composed of two cross-shaped beams that are perpendicular to each other.

[0023] The working principle of the four-rotor drone with foldable arms of the present invention is as follows:

[0024] In the foldable-arm quad-rotor drone 100 of the present invention, when the motor stops running, the propeller 30 stops running. At this time, the thrust provided by the propeller 30 is zero. Under the action of the spring 40 and the hinge 50, the arm 20 will be pulled to a vertical position to be folded. When the motor is running, the propeller 30 starts and when the thrust of the propeller 30 exceeds the tension of the spring 40, the arm 20 will be unfolded again.

[0025] Functions and Effects of the Embodiments

[0026] According to the quad-rotor drone with foldable arms involved in this embodiment, since the arms and the fuselage are connected by springs and hinges, the extension and retraction of the springs and the flipping of the hinges can be controlled by controlling the thrust of the propeller, thereby controlling the folding and unfolding of the arms; since the propeller is composed of a motor bracket, a motor and blades, the blades can be driven to rotate autonomously by the motor without the need for an additional driver, thus saving costs.

[0027] The quad-rotor drone with foldable arms according to the present embodiment has higher efficiency and stronger maneuverability because the propeller used is a ducted propeller.

[0028] Therefore, the foldable-arm quad-rotor drone of this embodiment has a simple structure, and can realize the function of folding the arms and deforming them during the flight of the drone without an additional driver, and the deformation effect is good. In addition, the time required for the opening and closing deformation of the arms is short, and the size of the folded arms is reduced by 50% relative to the size of the arms when they are extended, so that the volume is reduced, so that it can pass through narrow spaces that cannot be passed by existing generally non-deformable quad-rotor aircraft, and it can also retain the advantages of long endurance, large load, and high stability, and can play an important role in rescue, survey and other tasks.

[0029] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A quad-rotor drone with foldable arms, characterized in that: include: The fuselage has a square surface; Four arms, respectively connected to four sides of the fuselage and symmetrical about the center of the fuselage, and connected to the fuselage through springs and hinges; as well as A plurality of propellers are ducted propellers, which are respectively mounted on each of the arms, and each of the propellers is composed of a motor bracket, a motor fixed on the motor bracket, and a blade connected to the motor. When the propeller stops running, the spring and the hinge pull the arm to a vertical position to achieve folding. When the motor is running, the propeller is started and when the propeller thrust exceeds the tension of the spring, the four arms are unfolded. The surface of the arm is square and the side length is the same as the side length of the surface of the fuselage. The size of the arm after folding is equivalent to half of that when it is stretched. The motor bracket is composed of two cross-shaped cross beams that are perpendicular to each other.

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