Multi-rotor unmanned aerial vehicle with folding motor base arm structure

Abstract

The invention discloses a multi-rotor unmanned aerial vehicle with a folding motor base arm structure, and relates to the field of unmanned aerial vehicles, the multi-rotor unmanned aerial vehicle comprises a vehicle body base and a top cover arranged above the vehicle body base, a rotating shaft is rotatably connected between the centers of the opposite sides of the vehicle body base and the top cover, and the outer side of the rotating shaft is sleeved with a center gear; four connecting columns are arranged on the outer side of the rotating shaft, switching of two modes is completed through rotation of the center gear, in the cross-shaped mode, high maneuverability is achieved, action, rapid response and X-shaped layout can be achieved by changing a small amount of the rotating speed of the motor, high stability is achieved, and compared with a cross-shaped mode, the structure is simple, and operation is convenient. The number of motors for acceleration and deceleration during front-back and left-right movement of the X shape is large, control is quicker and more powerful, more high-difficulty movement can be completed, scene requirements can be met by changing modes according to requirements, and the X shape can be used by people with different proficiency degrees.

Description

Technical Field

[0001] The invention relates to the field of unmanned aerial vehicles, and in particular to a multi-rotor unmanned aerial vehicle with a folding motor seat arm structure. Background Art

[0002] Unmanned aerial vehicles, referred to as "drones", are unmanned aircraft controlled by radio remote control equipment and self-contained program control devices, or operated completely or intermittently autonomously by onboard computers. Multi-rotor drones are special unmanned rotorcraft with three or more rotor axes.

[0003] The wings of existing multi-rotor drones are divided into cross-shaped and X-shaped modes. Multi-rotor drones in different modes have different functions. UAVs of a single mode have a limited scope of application. If different drones are replaced for use in different scenarios, the cost is high and needs to be improved.

[0004] Therefore, it is necessary to propose a multi-rotor UAV with a foldable motor seat arm structure to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-rotor UAV with a foldable motor seat arm structure to solve the problem that the wings of existing multi-rotor UAVs are divided into cross-shaped and X-shaped modes, multi-rotor UAVs of different modes have different functions, and UAVs of a single mode have a limited scope of application. If different UAVs are replaced for use in different scenarios, the cost is high and needs to be improved.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-rotor drone with a foldable motor seat arm structure, comprising a body base and a top cover arranged above the body base, a rotating shaft is rotatably connected between the centers of the body base and the top cover on opposite sides, a central gear is sleeved on the outer side of the rotating shaft, four connecting columns are arranged on the outer side of the rotating shaft, the four connecting columns are fixed between the body base and the top cover, and bearings are fixed on the outer sides of the four connecting columns, the outer sides of the four bearings are all sleeved with first gears, the four first gears are meshed with the central gear, and connecting arms are fixed on the outer sides of the four bearings, a first motor is fixed at the center of the top end of the top cover, and the driving shaft of the first motor is fixedly connected to the rotating shaft;

[0007] One end of the four connecting arms away from the rotating shaft is rotatably connected to a rotating folding plate, the ends of the four rotating folding plates are fixedly connected to support seats, and the top ends of the four support seats are rotatably connected to rotating wings;

[0008] An arc-shaped guard plate is fixed between two adjacent connecting arms. The top and bottom ends of the middle parts of the four connecting arms are provided with embedded grooves, in which cleaning brushes are fixed. The two cleaning brushes are respectively attached to the upper and lower surfaces of the body base and the top cover.

[0009] Preferably, the angle between two adjacent connecting arms is ninety degrees, and the lengths of the four connecting arms are consistent. A third motor is fixed inside each of the four support seats, and the drive shaft of the third motor is fixedly connected to the corresponding rotating wing.

[0010] Preferably, a fixed block is fixed on one side of the four support seats away from the base of the machine body, and support rods are rotatably connected to both sides of the fixed block through a rotating shaft. The two support rods are distributed in a V shape, and the tip of the V-shaped structure faces one side of the fixed block. An L-shaped rod is elastically and telescopically connected to the two support rods on one side away from the fixed block, and a guard rod is fixed between the top ends of the two L-shaped rods.

[0011] A second motor is fixed inside the fixing block, and a driving shaft of the second motor is fixedly connected to one of the rotating shafts.

[0012] Preferably, an annular slide groove is opened at the top of the body base, and sliders are fixed to the bottom centers of the four arc-shaped guard plates. The four sliders are slidably fitted in the inside of the annular slide groove. A spacing is left between the body base and the top cover, and the sizes of the body base and the top cover are set to be consistent. The outer sides of the body base and the top cover are set to be elliptical, and the four arc-shaped guard plates are slidably set in the inner circles of the body base and the top cover.

[0013] Preferably, the support seat is configured to be in a frustum shape, with the tip of the frustum facing downward, a through opening is provided at the bottom end of the support seat, and a smoke bomb launcher is provided inside the through opening.

[0014] Preferably, a groove is provided on the outer side of the support seat, and a safety airbag in a collapsed state is installed inside the groove.

[0015] Preferably, a sensor module is fixed to the top of the top cover, and the sensor module includes a wind sensor and a collision sensor.

[0016] Preferably, a connecting groove is opened at one end of the four connecting arms away from the rotating shaft, one end of the rotating folding plate is rotatably connected to the inside of the connecting groove, a fastening screw is arranged at the top end of the connecting arm, the bottom end of the fastening screw passes through the connecting groove, and the passing end of the fastening screw is pressed against the upper surface of the corresponding rotating folding plate.

[0017] Preferably, a bottom box is fixed to the bottom end of the body base, a power supply is arranged inside the bottom box, and a camera is rotatably connected to one side of the bottom box.

[0018] Technical effects and advantages of the present invention:

[0019] 1. The switching between the two modes is completed by the rotation of the center gear. In the cross mode, it has higher maneuverability and can achieve action by changing a small amount of motor speed. It has a quick response and an X-shaped layout, which has stronger stability. Compared with the cross shape, the X-shaped has more motors for acceleration and deceleration when moving forward, backward, left and right, and the control is faster and more powerful. It can complete more difficult actions. According to the needs, it can adapt to the scene needs by changing the mode, and it can be used by people with different proficiency.

[0020] 2. When the four connecting arms rotate, the fixedly connected arc guard plate will be driven to move. The arc guard plate can increase the structural strength between two adjacent connecting arms, improve the stability of the rotation of the connecting arms, and maintain the angle between the two adjacent connecting arms. At the same time, the arc guard plate can protect the base and the top cover of the machine body, preventing wind and dust carried by the wind from entering the first gear and the center gear, affecting the internal structure and improving the service life.

[0021] 3. When the four connecting arms rotate, the cleaning brushes on the four connecting arms will sweep the upper and lower surfaces of the fuselage base and top cover to remove excess dust and prevent dust and impurities from accumulating in the fuselage base and top cover, increasing the weight of the entire drone.

[0022] 4. In the actual operation of the present invention, before the drone takes off, the guard rod and the support rod are facing the ground, and the drone can be supported by the guard rod. After the drone takes off, the second motor controls the support rod to rotate, and the support rod and the corresponding guard rod are parallel to the ground. The guard rod protects the outer side of the rotor to prevent obstacles in the air from colliding with the rotor during flight, causing damage to the drone.

[0023] 5. Due to the elastic telescopic connection between the support rod and the L-shaped rod, when the ground is uneven or there are pits on the ground, the L-shaped rod is automatically extended by the elastic force of the damping member to match the depth of the pit, thereby keeping the drone in a relatively flat state on the ground. When the guardrail is in the state of protecting the rotor, it can buffer the drone when it is hit.

[0024] 6. When the drone is unable to continue flying after being hit or when the wind is strong, the wind sensor and collision sensor can transmit the wind signal and collision signal to the microprocessor, and the microprocessor controls the airbag to pop out. The airbag can increase the buoyancy of the drone in the air, slow down the descent speed of the drone, and avoid the descent speed being too fast, which may cause the drone to collide with the ground and be damaged.

[0025] 7. The airbag can act as a buffer when the drone lands on the ground. When the drone falls into the water, it can also make the drone float on the water surface to avoid sinking. Furthermore, when the drone is hit or loses connection, the microprocessor will synchronously open the smoke bomb launcher to discharge the smoke from the outlet, so that the smoke can form a trajectory in the air, making it easier for personnel to find the descending drone.

[0026] 8. In the actual operation of the present invention, the four rotating folding plates can be rotated at the corresponding ends of the connecting arms. When the four rotating folding plates are rotated toward the base of the fuselage, the space occupied by the drone can be reduced, making it easier to store and use. The position of the rotating folding plates after rotation can be fixed by tightening the screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the cross-shaped mode structure of the UAV of the present invention.

[0028] Figure 2 It is a schematic diagram of the X-shaped mode structure of the drone of the present invention.

[0029] Figure 3 For the present invention Figure 1 Enlarged schematic diagram at point A in the middle.

[0030] Figure 4 It is a schematic diagram of the structure of the base box and the camera of the present invention.

[0031] Figure 5 It is a schematic structural diagram of the first gear and the central gear of the present invention.

[0032] Figure 6 It is a structural schematic diagram of the annular chute of the present invention.

[0033] Figure 7 It is a structural schematic diagram of the opening of the present invention.

[0034] In the figure: 1. body base; 2. top cover; 3. first motor; 4. sensor module; 5. connecting arm; 6. support seat; 7. rotating wing; 8. rotating folding plate; 9. fastening screw; 10. L-shaped rod; 11. guard rod; 12. fixing block; 13. support rod; 14. groove; 15. airbag; 16. bottom box; 17. camera; 18. connecting column; 19. bearing; 20. first gear; 21. arc guard plate; 22. cleaning brush; 23. annular slide groove; 24. through port; 25. center gear; 26. rotating shaft. DETAILED DESCRIPTION

[0035] The present invention provides Figure 1 to Figure 7A multi-rotor drone with a foldable motor arm structure is shown, comprising a body base 1 and a top cover 2 arranged above the body base 1, a rotating shaft 26 is rotatably connected between the centers of the body base 1 and the top cover 2 on opposite sides, a central gear 25 is sleeved on the outer side of the rotating shaft 26, a first motor 3 is fixed to the center of the top end of the top cover 2, the driving shaft of the first motor 3 is fixedly connected to the rotating shaft 26, four connecting columns 18 are fixed between the body base 1 and the top cover 2, and the body base 1 and the top cover 2 are connected and fixed by the four connecting columns 18.

[0036] Four connecting columns 18 are arranged outside the rotating shaft 26, and bearings 19 are fixed outside the four connecting columns 18. First gears 20 are sleeved outside the four bearings 19. The four first gears 20 are meshed with the central gear 25, and connecting arms 5 are fixed outside the four bearings 19.

[0037] One end of the four connecting arms 5 away from the rotating shaft 26 is rotatably connected to a rotating folding plate 8, the ends of the four rotating folding plates 8 are fixedly connected to a supporting seat 6, and the top ends of the four supporting seats 6 are rotatably connected to a rotating wing 7;

[0038] In the initial state, the four connecting arms 5 and the body base 1 are in a cross-shaped mode. When the first motor 3 is started, it can drive the rotating shaft 26 and the central gear 25 to rotate. The rotation of the central gear 25 can drive the four meshing first gears 20 to rotate, so that the four connecting arms 5 rotate around the rotating shaft 26. When the four connecting arms 5 rotate forty-five degrees around the rotating shaft 26, the four connecting arms 5 can form an X-shaped mode, and the switching of the two modes is completed by rotation. In the cross-shaped mode, it has higher maneuverability, and the action can be achieved by changing a small amount of motor speed. The response is fast, the X-shaped layout has strong stability, and compared with the cross-shaped, the X-shaped has more motors for acceleration and deceleration when moving forward, backward, left and right, and the control is faster and more powerful, and more difficult actions can be completed. According to needs, the mode can be changed to adapt to the needs of the scene, and it can be used by people with different proficiency.

[0039] An arc-shaped guard plate 21 is fixed between two adjacent connecting arms 5, and an embedded groove is provided at the top and bottom of the middle part of the four connecting arms 5, and a cleaning brush 22 is fixed in the embedded groove. The two cleaning brushes 22 are respectively attached to the upper and lower surfaces of the body base 1 and the top cover 2, and an annular slide groove 23 is provided at the top of the body base 1. Slide blocks are fixed at the bottom centers of the four arc-shaped guard plates 21, and the four slide blocks are slidably fitted in the inside of the annular slide groove 23.

[0040] Furthermore, when the four connecting arms 5 rotate, the fixedly connected arc guard plate 21 will be driven to move. The arc guard plate 21 can increase the structural strength between two adjacent connecting arms 5, improve the stability of the rotation of the connecting arms 5, and maintain the angle between the two adjacent connecting arms 5. At the same time, the arc guard plate 21 can protect the body base 1 and the top cover 2, preventing wind and dust carried by the wind from entering the first gear 20 and the center gear 25, causing the internal structure to be affected, thereby improving the service life.

[0041] In addition, when the four connecting arms 5 rotate, the cleaning brushes 22 on the four connecting arms 5 will sweep the upper and lower surfaces of the body base 1 and the top cover 2 to remove excess dust and prevent dust and impurities from accumulating in the body base 1 and the top cover 2 to increase the weight of the entire drone.

[0042] By providing the annular sliding groove 23 , the four connecting arms 5 can be more stable when rotating, and a certain supporting force can be provided for the connecting arms 5 .

[0043] Specifically, the angle between two adjacent connecting arms 5 is ninety degrees, and the lengths of the four connecting arms 5 are the same. A third motor is fixed inside each of the four support seats 6. The drive shaft of the third motor is fixedly connected to the corresponding rotating wing 7. In the initial state, the four connecting arms 5 and the body base 1 are in a cross shape. By rotating forty-five degrees, the four connecting arms 5 and the body base 1 are distributed in an X shape.

[0044] The four third motors can respectively drive the four rotating wings 7 to rotate, and there is a distance between the body base 1 and the top cover 2, and the sizes of the body base 1 and the top cover 2 are set to be consistent, the outer sides of the body base 1 and the top cover 2 are set to be elliptical, and the four arc-shaped guard plates 21 are all slidably set in the inner circle of the body base 1 and the top cover 2.

[0045] A fixed block 12 is fixed on one side of the four support seats 6 away from the body base 1, and support rods 13 are rotatably connected to both sides of the fixed block 12 through a rotating shaft. The two support rods 13 are distributed in a V shape, and the tip of the V-shaped structure faces one side of the fixed block 12. The two support rods 13 are elastically and telescopically connected to an L-shaped rod 10 on one side away from the fixed block 12, and a guard rod 11 is fixed between the top ends of the two L-shaped rods 10.

[0046] Specifically, a telescopic groove is opened at one end of the support rod 13, and a damping member is fixed in the telescopic groove. One end of the damping extension member is connected to the L-shaped rod 10. The damping member can use a damping telescopic rod or a spring-damping telescopic rod, or other components that can achieve buffering and telescopic functions. Since it is a prior art, it will not be described in detail.

[0047] A second motor is fixed inside the fixed block 12, and a driving shaft of the second motor is fixedly connected to one of the rotating shafts. A bottom box 16 is fixed to the bottom end of the body base 1, and a power supply is provided inside the bottom box 16. A camera 17 is rotatably connected to one side of the bottom box 16, and the camera 17 can monitor the environment in the air and on the ground in real time.

[0048] In the actual operation of the present invention, before the drone takes off, the guard bar 11 and the support rod 13 are facing the ground, and the drone can be supported by the guard bar 11. After the drone takes off, the second motor controls the support rod 13 to rotate, and the support rod 13 and the corresponding guard bar 11 are parallel to the ground. The guard bar 11 protects the outer side of the rotor 7 to prevent obstacles in the air from colliding with the rotor 7 during flight, causing damage to the drone.

[0049] Similarly, when the drone is about to land, the user controls the camera 17 to rotate through the controller to check the ground environment. If the landing point is open, the second motor controls the support rod 13 to rotate again, driving the guard rod 11 to rotate toward the ground, thereby supporting the drone. At the same time, the support seat 6 can also support the bottom of the drone.

[0050] Since the support rod 13 and the L-shaped rod 10 are elastically telescopically connected, when the ground is uneven or there are pits on the ground, the L-shaped rod 10 is automatically extended by the elastic force of the damping member to match the depth of the pit, thereby keeping the drone in a relatively flat state on the ground. When the guard rod 11 is in a state of protecting the rotor 7, it can buffer the drone when it is hit.

[0051] A sensor module 4 is fixed on the top of the top cover 2, and the sensor module 4 includes a wind sensor and a collision sensor. The support seat 6 is set to be a cone, and the tip of the cone is set to face downward. A through hole 24 is opened at the bottom end of the support seat 6, and a smoke bomb launcher is arranged inside the through hole 24. A groove 14 is opened on the outside of the support seat 6, and a safety airbag 15 in a contracted state is installed inside the groove 14. The safety airbag 15 includes a microprocessor, a gas generator and an airbag. When the drone is hit or the wind is strong, the drone cannot continue to fly, and the wind sensor and the collision sensor can transmit the wind signal and the collision signal to the microprocessor. The microprocessor controls the airbag 15 to pop out. The airbag 15 can increase the floating force of the drone in the air, slow down the descent speed of the drone, and avoid the descent speed being too fast, which causes the drone to collide with the ground and be damaged.

[0052] In addition, the airbag 15 can play a cushioning role when the drone lands on the ground, and can also make the drone float on the water surface to avoid sinking when the drone falls into the water.

[0053] Furthermore, when the UAV is hit or loses connection, the microprocessor will synchronously open the smoke bomb launcher to discharge the smoke from the opening 24, so that the smoke can form a track in the air, making it easier for personnel to find the descending UAV.

[0054] A connecting groove is opened at one end of the four connecting arms 5 away from the rotating shaft 26, and one end of the rotating folding plate 8 is rotatably connected to the inside of the connecting groove. A fastening screw 9 is arranged at the top of the connecting arm 5, and the bottom end of the fastening screw 9 passes through the connecting groove, and the passing end of the fastening screw 9 is pressed tightly against the corresponding upper surface of the rotating folding plate 8.

[0055] In the actual operation of the present invention, the four rotating folding plates 8 can be rotated at the corresponding ends of the connecting arms 5. When the four rotating folding plates 8 are rotated toward the body base 1, the space occupied by the drone can be reduced, which is convenient for storage and use. The position of the rotating folding plates 8 after rotation can be fixed by tightening the screws 9.

Claims

1. A multi-rotor drone with a foldable motor base arm structure, comprising a body base (1) and a top cover (2) arranged above the body base (1), characterized in that: A rotating shaft (26) is rotatably connected between the centers of the machine body base (1) and the top cover (2) on opposite sides, a central gear (25) is sleeved on the outer side of the rotating shaft (26), four connecting columns (18) are arranged on the outer side of the rotating shaft (26), the four connecting columns (18) are fixed between the machine body base (1) and the top cover (2), bearings (19) are fixed on the outer sides of the four connecting columns (18), first gears (20) are sleeved on the outer sides of the four bearings (19), the four first gears (20) are meshed with the central gear (25), and connecting arms (5) are fixed on the outer sides of the four bearings (19), a first motor (3) is fixed on the top center of the top cover (2), and the driving shaft of the first motor (3) is fixedly connected to the rotating shaft (26); One end of the four connecting arms (5) away from the rotating shaft (26) is rotatably connected to a rotating folding plate (8), the ends of the four rotating folding plates (8) are fixedly connected to a supporting seat (6), and the top ends of the four supporting seats (6) are rotatably connected to a rotating wing (7); An arc-shaped guard plate (21) is fixed between two adjacent connecting arms (5), and an embedded groove is provided at the top and bottom of the middle part of the four connecting arms (5), and a cleaning brush (22) is fixed in the embedded groove. The two cleaning brushes (22) are respectively attached to the upper and lower surfaces of the machine body base (1) and the top cover (2).

2. A multi-rotor UAV with a foldable motor arm structure according to claim 1, characterized in that: The angle between two adjacent connecting arms (5) is ninety degrees, and the lengths of the four connecting arms (5) are consistent. A third motor is fixed inside each of the four supporting seats (6), and the driving shaft of the third motor is fixedly connected to the corresponding rotating wing (7).

3. The multi-rotor UAV with a foldable motor seat arm structure according to claim 1, characterized in that: A fixing block (12) is fixed to each of the four support seats (6) on a side away from the machine body base (1); both sides of the fixing block (12) are rotatably connected to support rods (13) via a rotating shaft; the two support rods (13) are distributed in a V-shape, and the tip of the V-shaped structure faces one side of the fixing block (12); the two support rods (13) are elastically and telescopically connected to an L-shaped rod (10) on a side away from the fixing block (12); and a guard rod (11) is fixed between the top ends of the two L-shaped rods (10).

4. The multi-rotor UAV with a foldable motor arm structure according to claim 3, characterized in that: A second motor is fixed inside the fixed block (12), and a drive shaft of the second motor is fixedly connected to one of the rotating shafts.

5. The multi-rotor UAV with a foldable motor arm structure according to claim 1, characterized in that: The top of the machine body base (1) is provided with an annular slide groove (23), and the bottom centers of the four arc-shaped guard plates (21) are fixed with sliders, and the four sliders are slidably matched inside the annular slide groove (23). A spacing is left between the machine body base (1) and the top cover (2), and the sizes of the machine body base (1) and the top cover (2) are set to be consistent. The outer sides of the machine body base (1) and the top cover (2) are set to be elliptical, and the four arc-shaped guard plates (21) are slidably set in the inner circles of the machine body base (1) and the top cover (2).

6. The multi-rotor UAV with a foldable motor base arm structure according to claim 1, characterized in that: The support seat (6) is arranged in a frustum shape, and the tip of the frustum is arranged downwards. A through opening (24) is provided at the bottom end of the support seat (6), and a smoke bomb launcher is arranged inside the through opening (24).

7. The multi-rotor UAV with a foldable motor base arm structure according to claim 1, characterized in that: A groove (14) is provided on the outer side of the support seat (6), and a safety airbag (15) in a contracted state is installed inside the groove (14).

8. The multi-rotor UAV with a foldable motor arm structure according to claim 1, characterized in that: A sensor module (4) is fixed to the top of the top cover (2), and the sensor module (4) comprises a wind sensor and a collision sensor.

9. The multi-rotor UAV with a foldable motor arm structure according to claim 1, characterized in that: A connecting groove is formed at one end of the four connecting arms (5) away from the rotating shaft (26), one end of the rotating folding plate (8) is rotatably connected to the inside of the connecting groove, and a fastening screw (9) is provided at the top end of the connecting arm (5), the bottom end of the fastening screw (9) passes through the connecting groove, and the passing end of the fastening screw (9) is pressed against the upper surface of the corresponding rotating folding plate (8).

10. The multi-rotor UAV with a foldable motor base arm structure according to claim 1, characterized in that: A bottom box (16) is fixed to the bottom end of the machine body base (1), a power source is arranged inside the bottom box (16), and a camera (17) is rotatably connected to one side of the bottom box (16).

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