Back electromotive force suppression device for multi-rotor unmanned aerial vehicle

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, and discloses a back electromotive force suppression device for a multi-rotor unmanned aerial vehicle, which comprises a vehicle body, the outer side of the vehicle body is fixedly connected with four extension arms, the bottom ends of the four extension arms are respectively provided with a driving assembly, the top ends of the driving assemblies are fixedly connected with paddles, and the blades are fixedly connected with the outer side of the vehicle body. The interior of the extension arm is slidably connected with a suppressor, the interior of the suppressor is provided with a clamping groove, the interior of the extension arm is provided with a placement groove, the interior of the placement groove is slidably connected with a clamping column, the outer side of the clamping column is fixedly connected with a pushing piece, and the interior of the placement groove is provided with a first pushing spring; the bottom end of the clamping column is rotationally connected with a driving piece. According to the utility model, the clamping column is clamped with the clamping groove, so that the suppressor can be quickly fixed and dismounted, the dismounting and maintenance process is simpler and more convenient, the maintenance difficulty is reduced, the maintenance flexibility is improved, and the downtime is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to a back electromotive force suppression device for a multi-rotor unmanned aerial vehicle. Background Art

[0002] A back-EMF suppression device is a device used in multi-rotor drones. It is designed to achieve rapid braking or adjust the speed and direction of the aircraft without consuming a lot of electricity by generating current in reverse. This device is usually composed of a motor, an electric regulator and a sensor. It can respond quickly and generate reverse current when the drone is flying, thereby generating braking force or adjusting the motion state of the aircraft. By controlling the speed and direction of the motor, the back-EMF suppression device can achieve functions such as precise hovering, rapid stopping or rapid turning of the drone, thereby improving the controllability and safety of the aircraft.

[0003] Some existing back-electromotive force suppression devices for UAVs are directly fixed on the motors. The process of disassembling them for maintenance is rather cumbersome, which increases the difficulty of maintenance, reduces the flexibility of maintenance, and increases the downtime. Therefore, a back-electromotive force suppression device for a multi-rotor UAV is proposed to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a back-electromotive force suppression device for a multi-rotor UAV, aiming to improve the problem that the back-electromotive force suppression devices for some UAVs in the prior art are directly fixed on the motor, and the process of disassembling them for maintenance is cumbersome, which increases the difficulty of maintenance, reduces the flexibility of maintenance, and increases downtime.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A back electromotive force suppression device for a multi-rotor unmanned aerial vehicle comprises a body, four extension arms are fixedly connected to the outer side of the body, a driving assembly is installed at the bottom end of the four extension arms, a blade is fixedly connected to the top end of the driving assembly, a suppressor is slidably connected to the inside of the extension arm, a card slot is provided inside the suppressor, a placement slot is provided inside the extension arm, a card column is slidably connected to the inside of the placement slot, a push sheet is fixedly connected to the outer side of the card column, a push spring is provided inside the placement slot, a driving sheet is rotatably connected to the bottom end of the card column, a limiting column is rotatably connected to the inside of the driving sheet, a sliding slot is provided at the top end of the extension arm, a sliding block is slidably connected to the inside of the sliding slot, and a reinforcement assembly is fixedly connected to the inside of the suppressor;

[0007] As a further description of the above technical solution:

[0008] Each of the driving assemblies comprises a motor and a transmission rod, wherein the motor is mounted at the bottom end of the extension arm, and the bottom end of the transmission rod is fixedly connected to the driving end of the motor;

[0009] As a further description of the above technical solution:

[0010] The reinforcement assembly includes a fixed column, two clips, two push springs and two limit columns. The fixed column is installed inside the suppressor. The insides of the two clips are slidably connected to the outside of the fixed column. The two push springs are sleeved on the outside of the fixed column. The adjacent ends of the two limit columns are respectively fixedly connected to the distant ends of the two clips.

[0011] As a further description of the above technical solution:

[0012] The adjacent ends of the two push springs are respectively fixedly connected to the distant ends of the two clips, and the outer sides of the two limit posts are slidably connected to the inside of the suppressor;

[0013] As a further description of the above technical solution:

[0014] The left and right sides of the bottom end of the body are fixedly connected to support legs, and the bottom end of the body is fixedly connected to a camera;

[0015] As a further description of the above technical solution:

[0016] The outer sides of the four clamping columns are respectively slidably connected to the insides of the four clamping slots, and the outer sides of the four pushing sheets are respectively slidably connected to the insides of the four placement slots;

[0017] As a further description of the above technical solution:

[0018] The four push springs are respectively sleeved on the outside of the four clamping columns, and one end of the four push springs is respectively fixedly connected to the other end of the four push sheets;

[0019] As a further description of the above technical solution:

[0020] The four limiting columns are respectively installed inside the four extension arms, and the bottom ends of the four sliding blocks are respectively rotatably connected to the top ends of the four driving sheets.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, the suppressor can be quickly fixed and disassembled by engaging the clamping column with the clamping slot, making the process of disassembly for maintenance simpler, reducing the difficulty of maintenance, improving the flexibility of maintenance, and reducing downtime.

[0023] 2. In the utility model, the second push spring pushes the clip, so that the clip clamps and fixes the transmission rod, and then the suppressor can be fixed more firmly, ensuring the stability of the suppressor operation and providing better back electromotive force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional schematic diagram of a back electromotive force suppression device for a multi-rotor UAV proposed by the utility model;

[0025] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0026] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0027] Figure 4 This is a structural schematic diagram of a clamping column of a back electromotive force suppression device for a multi-rotor UAV proposed by the utility model;

[0028] Figure 5 This is a schematic structural diagram of a suppressor of a back electromotive force suppression device for a multi-rotor UAV proposed in the utility model.

[0029] Legend:

[0030] 1. Body; 2. Extension arm; 3. Motor; 4. Transmission rod; 5. Paddle; 6. Suppressor; 7. Slot; 8. Placement slot; 9. Column; 10. Push plate; 11. Push spring 1; 12. Driving plate; 13. Limit column 1; 14. Sliding slot; 15. Sliding block; 16. Fixed column; 17. Clip; 18. Push spring 2; 19. Limit column 2; 20. Support leg; 21. Camera. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figure 1 - Figure 3 and Figure 4, an embodiment provided by the utility model: when the UAV needs to be braked or adjusted, the back-electromotive force suppression device will apply a reverse current to the motor 3, which will generate a reverse mechanical force to slow down or change the direction of the motor 3. By controlling the size and direction of the current, precise control of the UAV can be achieved, including rapid braking, precise hovering, rapid steering, etc. A back-electromotive force suppression device for a multi-rotor UAV includes a body 1, four extension arms 2 are fixedly connected to the outside of the body 1, and the bottom ends of the four extension arms 2 are installed with drive components, the top of the drive component is fixedly connected to the blade 5, and the inside of the extension arm 2 is slidably connected to the suppressor 6.

[0033] A card slot 7 is provided inside the suppressor 6, and the card slot 7 is designed to facilitate the engagement with the card column 9 to fix the suppressor 6. A placement slot 8 is provided inside the extension arm 2, and the card column 9 is slidably connected inside the placement slot 8. A push piece 10 is fixedly connected to the outside of the card column 9, and the push piece 10 is designed to facilitate the push spring 11 to push it, thereby pushing the card column 9, so that the card column 9 engages with the card slot 7. A push spring 11 is provided inside the placement slot 8, and the push spring 11 is designed to push the push piece 10. The bottom end of the card column 9 is rotatably connected to a driving piece 12, and the driving piece 12 is internally rotatably connected to a limiting column 13, and the limiting column 13 is designed to limit the driving piece 12. A sliding slot 14 is provided at the top of the extension arm 2, and the sliding slot 14 is designed to facilitate the sliding block 15 to slide inside it.

[0034] The sliding groove 14 is internally slidably connected with a sliding block 15. The design of the sliding block 15 is to facilitate, when being toggled, to drive the card column 9 to no longer engage with the card slot 7 through the driving sheet 12. The interior of the suppressor 6 is fixedly connected with a reinforcement component. Each driving component includes a motor 3 and a transmission rod 4. The motor 3 is installed at the bottom end of the extension arm 2. The bottom end of the transmission rod 4 is fixedly connected to the driving end of the motor 3. The design of the motor 3 is to facilitate driving the transmission rod 4, thereby driving the paddle 5. Support legs 20 are fixedly connected to the left and right sides of the bottom end of the body 1. The support legs 20 are designed to support the body 1. A camera 21 is fixedly connected to the bottom end of the body 1. The outer sides of the four card columns 9 are respectively slidably connected to the inside of the four card slots 7. The card columns 9 are designed to facilitate engaging with the card slots 7, thereby fixing the suppressor 6.

[0035] The outer sides of the four push plates 10 are respectively slidably connected to the inside of the four receiving grooves 8. The design of the push plates 10 is to facilitate the push spring 11 to push it, thereby pushing the card column 9, so that the card column 9 is engaged with the card slot 7. The four push springs 11 are respectively sleeved on the outer sides of the four card columns 9, and one end of the four push springs 11 is respectively fixedly connected to the other end of the four push plates 10. The design of the push spring 11 is to push the push plates 10. The four limit columns 13 are respectively installed in the inside of the four extension arms 2. The design of the limit column 13 is to limit the driving plate 12. The bottom ends of the four sliding blocks 15 are respectively rotatably connected to the top ends of the four driving plates 12. The design of the sliding blocks 15 is to facilitate the card column 9 to no longer engage with the card slot 7 through the driving plate 12 when it is toggled.

[0036] like Figure 2 and Figure 5 As shown, the reinforcement assembly includes a fixed column 16, two clips 17, two push springs 18 and two limit columns 19. The fixed column 16 is installed inside the suppressor 6. The design of the fixed column 16 is to facilitate the placement of the clips 17 and the push springs 18. The insides of the two clips 17 are slidably connected to the outside of the fixed column 16. The design of the clips 17 is to facilitate the push springs 18 to push it, thereby clamping the transmission rod 4. The two push springs 18 are sleeved on the outside of the fixed column 16. The push springs 18 are 8 is designed to push the clip 17, the proximal ends of the two limit columns 19 are respectively fixedly connected to the distal ends of the two clips 17, the limit columns 19 are designed to facilitate limiting the clip 17, the proximal ends of the two push springs 18 are respectively fixedly connected to the distal ends of the two clips 17, the push springs 18 are designed to push the clip 17, the outer sides of the two limit columns 19 are slidably connected to the inside of the suppressor 6, and the limit columns 19 are designed to facilitate limiting the clip 17.

[0037] Working principle: When the UAV needs to be braked or adjusted, the back-EMF suppression device will apply a reverse current to the motor 3, which will generate a reverse mechanical force to slow down or change the direction of the motor 3. By controlling the size and direction of the current, precise control of the UAV can be achieved, including rapid braking, precise hovering, rapid steering, etc. When the UAV needs to be disassembled and maintained after the back-EMF suppression device has been used for a period of time, the sliding block 15 is manually moved. The sliding block 15 will drive one end of the driving piece 12, so that the other end of the driving piece 12 pulls the card column 9, and then the card column 9 leaves the inside of the card slot 7. At this time, the suppressor 6 can be removed from the extension arm 2. When removing the suppressor 6, it is necessary to manually open the two clips 17 so that the clips 17 will not clamp the transmission rod 4. When the suppressor After the maintenance of 6 is completed, the suppressor 6 is put back into the extension arm 2. At this time, the last operation should be repeated. The sliding block 15 is moved again by hand to allow the sliding block 15 to drive the driving piece 12, thereby driving the clamping column 9, so that the clamping column 9 will not block the suppressor 6. After the suppressor 6 is placed in the right position, the two clips 17 are moved so that the clips 17 can clamp the transmission rod 4 under the push of the pushing spring 2 18. By engaging the clamping column 9 with the card slot 7, the suppressor 6 can be quickly fixed and disassembled, making the process of disassembly for maintenance simpler, reducing the difficulty of maintenance, improving the flexibility of maintenance, and reducing downtime. By allowing the pushing spring 2 18 to push the clip 17, the clip 17 can clamp and fix the transmission rod 4, so that the suppressor 6 can be fixed more firmly, ensuring the stability of the operation of the suppressor 6, and providing better back electromotive force.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A back electromotive force suppression device for a multi-rotor unmanned aerial vehicle, comprising a body (1), characterized in that: Four extension arms (2) are fixedly connected to the outer side of the body (1), and the bottom ends of the four extension arms (2) are all equipped with driving components. The top end of the driving component is fixedly connected with a blade (5). The interior of the extension arm (2) is slidably connected with a suppressor (6). A card slot (7) is provided inside the suppressor (6). A placement slot (8) is provided inside the extension arm (2), and a card column (9) is slidably connected inside the placement slot (8). A push sheet (10) is fixedly connected to the outer side of the card column (9), and a push spring (11) is provided inside the placement slot (8). The bottom end of the card column (9) is rotatably connected with a driving sheet (12), and the inside of the driving sheet (12) is rotatably connected with a limiting column (13). A sliding slot (14) is provided at the top end of the extension arm (2), and a sliding block (15) is slidably connected inside the sliding slot (14). The interior of the suppressor (6) is fixedly connected with a reinforcement component.

2. The back electromotive force suppression device for a multi-rotor UAV according to claim 1, characterized in that: Each of the driving components comprises a motor (3) and a transmission rod (4); the motor (3) is mounted at the bottom end of the extension arm (2); and the bottom end of the transmission rod (4) is fixedly connected to the driving end of the motor (3).

3. The back electromotive force suppression device for a multi-rotor UAV according to claim 1, characterized in that: The reinforcement component comprises a fixing column (16), two clips (17), two push springs (18) and two limit columns (19); the fixing column (16) is installed inside the suppressor (6); the insides of the two clips (17) are slidably connected to the outside of the fixing column (16); the two push springs (18) are sleeved on the outside of the fixing column (16); and the proximal ends of the two limit columns (19) are respectively fixedly connected to the distal ends of the two clips (17).

4. The back electromotive force suppression device for a multi-rotor UAV according to claim 3, characterized in that: The adjacent ends of the two push springs (18) are respectively fixedly connected to the distant ends of the two clips (17), and the outer sides of the two limit posts (19) are slidably connected to the inside of the suppressor (6).

5. The back electromotive force suppression device for a multi-rotor UAV according to claim 1, characterized in that: Support legs (20) are fixedly connected to the left and right sides of the bottom end of the machine body (1), and a camera (21) is fixedly connected to the bottom end of the machine body (1).

6. The back electromotive force suppression device for a multi-rotor UAV according to claim 1, characterized in that: The outer sides of the four clamping columns (9) are respectively slidably connected to the inside of the four clamping grooves (7), and the outer sides of the four pushing sheets (10) are respectively slidably connected to the inside of the four placement grooves (8).

7. The back electromotive force suppression device for a multi-rotor UAV according to claim 1, characterized in that: The four push springs (11) are respectively sleeved on the outside of the four clamping columns (9), and one end of the four push springs (11) is respectively fixedly connected to the other end of the four push sheets (10).

8. The back electromotive force suppression device for a multi-rotor UAV according to claim 1, characterized in that: The four limiting columns (13) are respectively installed inside the four extension arms (2), and the bottom ends of the four sliding blocks (15) are respectively rotatably connected to the top ends of the four driving plates (12).

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