Unmanned aerial vehicle coaxial power device with inclination angle

Abstract

The invention discloses an unmanned aerial vehicle coaxial power device with a dip angle, and belongs to the technical field of unmanned aerial vehicles, the unmanned aerial vehicle coaxial power device comprises a power main body part, a protective shell is arranged on the outer surface of the power main body part, and connecting ports are formed in the upper side and the lower side of the protective shell; fixing structures used for fixing the position of a motor are arranged at the two ends of the power main body part, the fixing structures are located in an inner cavity of the connecting port, a driving motor is arranged at the other ends of the fixing structures, and a motor adapter is arranged at the end, close to the fixing structures, of the driving motor; the face, close to the driving motor, of the motor adapter is arranged in a diagonal plane mode, a connecting structure conveniently connected with the driving motor is arranged on the surface of the motor adapter, and the face, close to the power body part, of the driving motor is arranged in an inclined plane mode, so that the yaw action speed of the unmanned aerial vehicle is increased. The response efficiency of the yaw action of the unmanned aerial vehicle is improved, and the sensitivity of the yaw action of the unmanned aerial vehicle is improved.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicles, and in particular to a coaxial power device of an unmanned aerial vehicle with an inclination angle. Background Art

[0002] Unmanned aerial vehicle (UAV) is an unmanned aircraft controlled by radio remote control equipment and self-contained program control devices, or operated completely or intermittently autonomously by an onboard computer. A multi-rotor UAV is a special unmanned helicopter with three or more rotor shafts. The motor on each shaft rotates to drive the rotor, thereby generating lift thrust. The total pitch of the rotor is fixed, unlike a general helicopter with a variable pitch. By changing the relative speed between different rotors, the size of the single-axis propulsion force can be changed, thereby controlling the trajectory of the aircraft.

[0003] Among them, pitch and roll can rely on the pitch moment and roll moment generated by the unbalanced rotor thrust. The yaw of a single rotor can rely on the coaxial yaw of the rotor's anti-torque. When the existing coaxial power device of a UAV cooperates in yaw movement, if the upper and lower rotors have no inclination, the anti-torque of the upper and lower shaft rotors will cancel each other out. Compared with a single-axis rotor, yaw requires a larger speed range adjustment. For example, when the speed of the upper shaft increases, due to the increase in thrust, the speed of the lower shaft needs to decrease synchronously to reduce the thrust. On the contrary, when the speed of the upper shaft decreases, the thrust decreases, and the speed of the lower shaft needs to increase synchronously to increase the thrust, which results in a slow yaw action of the UAV, reduces the response of the UAV's yaw action, and reduces the sensitivity of the UAV's yaw action.

[0004] According to the announcement number: CN112319786B, a multi-axis coaxial twin-propeller multi-rotor drone is provided, which includes: a frame cabin, a pluggable arm, a landing gear, a propeller protection device, a power unit and an electronic control system. A circular array of eight pluggable arms is located on the horizontal plane of the cabin, and the end of each arm is connected to two coaxial brushless motors through a motor seat with a mounting angle, driving the two propellers to rotate in opposite directions. The landing gear is a pair of steel landing gears, and the propeller protection device is a hollow cone installed under the lower motor. The technology of the present invention can be applied to manned multi-rotor or large-load multi-rotor drones, which not only has a simple structure and low manufacturing cost, but also has the advantages of small size, easy transportation, large load, anti-rollover, and strong redundancy. It can still fly normally even if multiple motor propellers fail, ensuring the life safety of the multi-axis coaxial twin-propeller multi-rotor drone and passengers.

[0005] According to the coaxial power device used in the multi-rotor drone introduced above, if the upper and lower rotors have no inclination angle, the anti-torque forces of the upper and lower rotors will cancel each other out. Compared with single-axis rotors, yaw requires a larger speed range adjustment. For example, when the speed of the upper shaft increases, the lower shaft needs to decrease its speed synchronously to reduce the pulling force due to the increase in pulling force. On the contrary, when the speed of the upper shaft decreases, the pulling force decreases, and the speed of the lower shaft needs to increase synchronously to increase the pulling force, which causes the yaw action of the drone to be slow, reduces the response of the yaw action of the drone, and reduces the sensitivity of the yaw action of the drone. Therefore, we need to propose a coaxial power device for drones with an inclination angle. Summary of the invention

[0006] The purpose of the present invention is to provide a coaxial power device for a drone with an inclination angle. Through the bevel setting of the motor adapter, the driving motor and the power main body are combined to be inclined, so that the upper and lower rotors have an inclination angle. When driving, the aerodynamic pulling force of the upper and lower propellers with the inclination angle of the upper and lower propellers has a horizontal component of the upper propeller and the lower propeller in the horizontal direction, and there will be a force difference. This force difference acts on the installed arm, which will generate a steering torque. The upper shaft speed increases and the lower shaft speed decreases. When the total pulling force remains unchanged, in addition to the counter-torque, the pulling force difference in the horizontal direction will also increase, the yaw moment will be greater, and the yaw force of the whole machine will increase, thereby improving the speed of the drone's yaw action, improving the response efficiency of the drone's yaw action, and increasing the sensitivity of the drone's yaw action, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a coaxial power device of an unmanned aerial vehicle with an inclination angle, comprising a power main body part, the outer surface of the power main body part is provided with a protective shell for protecting the power part, the upper and lower sides of the protective shell are provided with connecting ports, both ends of the power main body part are provided with fixing structures for fixing the position of the motor, the fixing structure is located in the inner cavity of the connecting port, the other end of the fixing structure is provided with a driving motor, the end of the driving motor close to the fixing structure is provided with a motor adapter, the side of the motor adapter close to the driving motor is arranged in an oblique surface, the surface of the motor adapter is provided with a connecting structure for convenient connection with the driving motor, and the side of the driving motor close to the power main body is arranged in an inclined surface.

[0008] Preferably, the fixed structure includes a power adapter, and the power adapter is provided in two groups. The two groups of power adapters are symmetrically distributed on the upper and lower sides of the power main body part. The surface of the motor adapter is provided with a power adapter hole adapted to the power adapter, and the inner cavity of the power adapter hole is cooperatively connected with the power adapter.

[0009] Preferably, each group of the power adapters is provided with four, and the four power adapters are all located in the inner cavity of the connecting port.

[0010] Preferably, an outer surface of the driving motor close to the power part is provided with anti-skid grooves, and the anti-skid grooves are provided in a plurality of groups.

[0011] Preferably, the protective shell comprises a protective sleeve shell, and protective side covers are arranged on both sides of the protective sleeve shell, and the protective sleeve shell and the protective side covers are bolted together by fasteners.

[0012] Preferably, heat dissipation fins are provided on both sides of the protective shell, and one end of the heat dissipation fin extends to the inner cavity of the protective shell.

[0013] Preferably, the connection structure comprises a fixing hole, the fixing hole is opened on the surface of the motor adapter, and the inner cavity of the fixing hole is provided with a fixing piece for fixing the motor.

[0014] Preferably, four groups of fixing holes are provided, and the four groups of fixing holes are symmetrically distributed around the motor adapter, and one end of the motor adapter is engaged with the inner cavity of the connecting port.

[0015] Preferably, the surface of the driving motor is provided with heat dissipation grooves, and the heat dissipation grooves are provided in a plurality of groups, and the plurality of groups of heat dissipation grooves are distributed on the surface of the driving motor around the center of a circle.

[0016] Preferably, the protective shell is in a rectangular shape, and has beveled surfaces formed on all four sides of the protective shell.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a coaxial power device for a drone with an inclination angle. The beveled surface of a motor adapter is set so that the driving motor and the power main body are combined to be inclined, so that the upper and lower rotors have an inclination angle. When driving, the aerodynamic pulling force of the upper and lower propellers with the inclination angle of the upper and lower propellers has a force difference in the horizontal direction. This force difference acts on the installed machine arm to generate a steering torque, so that the upper shaft speed is increased and the lower shaft speed is decreased. When the total pulling force remains unchanged, in addition to the counter-torsion, the pulling force difference in the horizontal direction is increased, the yaw moment is greater, and the yaw force of the whole machine is increased, thereby improving the speed of the drone's yaw action, improving the response efficiency of the drone's yaw action, and increasing the sensitivity of the drone's yaw action.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of removing the protective side cover of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the drive motor and the power main body of the present invention;

[0022] Figure 3 This is a structural schematic diagram of the drive motor of the present invention for disassembling the motor adapter;

[0023] Figure 4 It is a schematic diagram of the structure of the protective side cover of the present invention;

[0024] Figure 5 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0025] Figure 6 For the present invention Figure 2 Enlarged structural diagram at B in the middle.

[0026] In the figure: 1. power main body; 2. protective shell; 21. protective sleeve shell; 22. protective side cover; 23. sealing gasket; 3. connection port; 4. fixing structure; 41. power adapter; 42. power adapter hole; 5. drive motor; 6. motor adapter; 7. connection structure; 71. fixing hole; 72. fixing part; 8. anti-skid groove; 9. heat dissipation fin; 10. heat dissipation groove; 11. heat dissipation annular groove; 12. heat dissipation hole; 13. support seat; 14. support groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1 to Figure 6The present invention provides a coaxial power device of a drone with an inclination angle, comprising a power main body 1, a protective shell 2 for protecting the power part is arranged on the outer surface of the power main body 1, and connection ports 3 are provided on the upper and lower sides of the protective shell 2, and fixing structures 4 for fixing the position of the motor are arranged at both ends of the power main body 1, and the fixing structure 4 is located in the inner cavity of the connection port 3, and a driving motor 5 is arranged at the other end of the fixing structure 4, and a motor adapter 6 is arranged at one end of the driving motor 5 close to the fixing structure 4, and a side of the motor adapter 6 close to the driving motor 5 is arranged in an oblique section, and a connection structure 7 for convenient connection with the driving motor 5 is arranged on the surface of the motor adapter 6, and a side of the driving motor 5 close to the power main body 1 is arranged in an inclined surface;

[0029] Furthermore, the motor adapter 6 is connected to the drive motor 5 through the connecting structure 7, and then the two sets of motors are installed on the upper and lower sides of the power main part 1 through the fixing structure 4. Due to the bevel setting of the motor adapter 6, the drive motor 5 is tilted after being combined with the power main part 1, so that the upper and lower rotors have an inclination angle. When driving, the aerodynamic pulling force of the upper and lower propellers with inclination angles of the upper and lower blades has a horizontal component of the upper propeller and the lower propeller in the horizontal direction, and there will be a force difference. This force difference acts on the installed arm, which will generate a steering torque. The upper shaft speed increases and the lower shaft speed decreases. When the total pulling force remains unchanged, in addition to the counter-torque, the pulling force difference in the horizontal direction will also increase, and the yaw moment will be greater. The yaw force of the whole machine will increase, thereby improving the speed of the UAV's yaw action, improving the response efficiency of the UAV's yaw action, and increasing the sensitivity of the UAV's yaw action.

[0030] Preferably, the fixing structure 4 includes a power adapter 41, and two groups of power adapters 41 are provided. The two groups of power adapters 41 are symmetrically distributed on the upper and lower sides of the power main body 1. The surface of the motor adapter 6 is provided with a power adapter hole 42 that is compatible with the power adapter 41. The inner cavity of the power adapter hole 42 is matched with the power adapter 41. The motor adapter 6 is combined with the power main body 1, and the power adapter 41 is inserted into the inner cavity of the power adapter hole 42. Then, the power adapter 41 is fixed to the power adapter hole 42, so that the drive motor 5 is fixed on the power main body 1 and installed.

[0031] Specifically, each group of power adapters 41 is provided with four, and the four power adapters 41 are all located in the inner cavity of the connecting port 3. Through the setting of the power adapters 41, the four sides of the bottom end of the motor adapter 6 are fixedly supported, thereby improving the stability of the motor adapter 6 and the power main part 1 after the combination, and preventing the driving motor 5 from shaking on the surface of the power main part 1 after the combination.

[0032] In a further embodiment, an anti-skid groove 8 is provided on the outer surface of the driving motor 5 close to the power part, and a plurality of anti-skid grooves 8 are provided. By providing the anti-skid grooves 8, the friction on the outer surface of the driving motor 5 is increased, so that the friction between the hands of the staff and the surface of the driving motor 5 is increased, thereby facilitating the installation and disassembly of the driving motor 5 at a later stage, and avoiding the driving motor 5 falling from the hands of the staff and colliding with the ground during installation or disassembly.

[0033] Preferably, the protective shell 2 includes a protective sleeve 21, and protective side covers 22 are arranged on both sides of the protective sleeve 21. The protective sleeve 21 and the protective side covers 22 are bolted together by fasteners. By setting the protective sleeve 21, the outer surface of the power main body 1 can be protected to prevent the power main body 1 from colliding with the outside. During installation, the power main body 1 can be first inserted into the inner cavity of the protective sleeve 21, and then the protective side covers 22 on both sides are covered. Then, the protective side covers 22 and the protective sleeve 21 are bolted together by fasteners, so that the protective sleeve 21 and the protective side covers 22 are combined into a protective shell 2 to protect the power main body 1.

[0034] In addition, a sealing gasket 23 is also bonded to the inner wall of the protective side cover 22, and the surface of the sealing gasket 23 is in contact with the inner wall of the protective sleeve 21. The sealing gasket 23 is provided to increase the sealing effect of the protective side cover 22 and the protective sleeve 21 after they are combined, thereby preventing water vapor, dust, etc. from entering the inner cavity of the protective shell 2 through the gap at the connection between the protective side cover 22 and the protective sleeve 21, thereby improving the sealing effect of the protective shell 2 on the power main body 1 and improving the protection effect.

[0035] Specifically, the inner wall of the protective side cover 22 is also fixedly connected with a support block, and the outer surface of the protective shell 21 is provided with a support groove 14 adapted to the support block, and the surface of the support block is engaged with the inner cavity of the support groove 14. There are four groups of support blocks, and the four groups of support blocks are symmetrically distributed on the inner wall of the protective side cover 22. Through the cooperation between the support blocks and the support grooves 14, a support effect is provided when the protective side cover 22 and the protective shell 21 are initially combined, and the protective side cover 22 is assisted in being fixed on the protective shell 21, and a preliminary supporting force is provided between the protective side cover 22 and the protective shell 21, so as to facilitate subsequent combination operations.

[0036] Furthermore, heat dissipation fins 9 are provided on both sides of the protective shell 21, and one end of the heat dissipation fins 9 extends to the inner cavity of the protective shell 21. Through the setting of the heat dissipation fins 9, the heat generated when the power main body part is driven is transferred to the heat dissipation fins 9, and then the heat is transferred to the outside of the protective shell 2 through the heat dissipation fins 9, which assists in dissipating the heat generated when the power main body part 1 is working, thereby achieving the heat dissipation effect of the power main body part 1, avoiding the power main body part 1 from working in a high temperature environment for a long time, and extending the service life of the power main body part 1;

[0037] Preferably, positioning blocks are installed at symmetrical positions on the protective shell 21, positioning rods are fixedly connected at symmetrical positions on the heat dissipation fins 9, a socket connected to the positioning block is fixedly connected to the positioning rod, and the socket and the positioning block are fixedly connected by fasteners.

[0038] In addition, the connecting structure 7 includes a fixing hole 71, which is opened on the surface of the motor adapter 6. The inner cavity of the fixing hole 71 is provided with a fixing part 72 for fixing the motor. The motor adapter 6 is combined with the drive motor 5, and finally the fixing part 72 is taken and inserted into the inner cavity of the fixing hole 71. By locking the fixing part 72 to the drive motor 5, the drive motor 5 and the motor adapter 6 can be combined and disassembled, which provides convenience for the subsequent maintenance and replacement of the drive motor 5 and the motor adapter 6.

[0039] Preferably, four groups of fixing holes 71 are provided, and the four groups of fixing holes 71 are symmetrically distributed around the motor adapter 6. One end of the motor adapter 6 is engaged with the inner cavity of the connecting port 3. Through the setting of the fixing holes 71, the connection between the motor adapter 6 and the drive motor 5 is supported around to prevent the motor adapter 6 from rotating on the surface of the drive motor 5, thereby increasing the stability of the motor adapter 6 after being connected to the drive motor 5.

[0040] Further, the surface of the drive motor 5 is provided with heat dissipation grooves 10, and the heat dissipation grooves 10 are provided in a plurality of groups, and the plurality of heat dissipation grooves 10 are distributed around the center of a circle on the surface of the drive motor 5. Through the provision of the heat dissipation grooves 10, the heat generated when the drive motor 5 is working can be discharged through the heat dissipation grooves 10, so as to avoid the heat from accumulating inside the drive motor 5. The provision of the plurality of heat dissipation grooves 10 can improve the heat dissipation effect of the drive motor 5, thereby extending the service life of the drive motor 5.

[0041] Specifically, a heat dissipation annular groove is provided at one end of the drive motor 5 away from the heat dissipation groove 10, and two groups of heat dissipation annular grooves are arranged. The inner cavities of the two groups of heat dissipation annular grooves are provided with heat dissipation holes, and the inner cavities of the heat dissipation holes are connected with the inner cavity of the drive motor 5. There are several groups of heat dissipation holes. Through the cooperation of the heat dissipation holes and the heat dissipation annular grooves, the heat dissipation of the other side of the drive motor 5 is assisted, the flow speed of the heat inside the drive motor 5 is accelerated, the heat dissipation effect inside the drive motor 5 is improved, and the heat dissipation speed of the drive motor 5 is increased.

[0042] In addition, the protective shell 2 is rectangular in shape, and chamfered surfaces are provided on all four sides of the protective shell 2. The rectangular shape of the protective shell 2 makes it convenient for the staff to hold the protective shell 2. The chamfered surfaces on all four sides of the protective shell 2 reduce the sharpness of the four corners of the protective shell 2, thereby preventing the protective shell 2 from scratching the hands of the staff through the corners when installing or disassembling the power main body 1, thereby improving the convenience of disassembling and assembling the protective shell 2.

[0043] When used specifically: when driving, the power main body 1 is started to provide power for the motor adapters 6 on the upper and lower sides, and then the drive motors 5 on both sides are started, so that the two sets of drive motors 5 drive the upper propeller and the lower propeller to rotate. Since the motor adapter 6 is arranged with a beveled surface on one side close to the drive motor 5, the drive motor 5 is arranged tilted after being combined with the power main body 1, so that the upper and lower rotors have an inclination angle, so that the upper and lower propellers rotate to generate aerodynamic pulling force. The aerodynamic pulling force of the upper and lower propellers has a horizontal component force of the upper propeller and the lower propeller in the horizontal direction, and there will be a force difference. This force difference acts on the installed machine arm, which will generate a steering torque. The upper shaft speed increases and the lower shaft speed decreases. When the total pulling force remains unchanged, in addition to the counter-torque, the pulling force difference in the horizontal direction will also increase, and the yaw moment will be greater, thereby improving the speed of the UAV's yaw action, improving the response efficiency of the UAV's yaw action, and increasing the sensitivity of the UAV's yaw action;

[0044] During installation, first combine the motor adapter 6 with the drive motor 5, then take the fixing piece 72 and insert it into the inner cavity of the fixing hole 71, lock the drive motor 5 with the fixing piece 72, then take the power main body 1 and insert it into the inner cavity of the protective shell 21, then take the drive motor 5 and combine it with the power main body 1, after the combination, take the power adapter 41 and insert it from the protective shell 21 into the power main body 1, and extend it upward through the connecting port 3, when the power adapter 41 is inserted into the inner cavity of the power adapter hole 42, the power adapter 41 and the power adapter hole 42 are locked and fixed, then the side panels on both sides are taken and combined with the protective shell 21, and finally the fasteners are taken to lock the protective shell 21 and the side panels, so as to realize the assembly of the coaxial power device;

[0045] During operation, the heat generated by the power main part 1 is in the protective shell 2, and then the heat is absorbed by the heat dissipation fins 9 and transferred to the outside of the protective shell 2 for heat dissipation, thereby preventing the heat from accumulating in the protective shell 2 for a long time and causing the service life of the power main part 1 to be reduced. At the same time, the heat generated by the drive motor 5 during operation can be discharged through the heat dissipation groove 10 to prevent the heat from accumulating inside the drive motor 5. The setting of several groups of heat dissipation grooves 10 can improve the heat dissipation effect of the drive motor 5, thereby extending the service life of the drive motor 5 and the power main part 1, and increasing the service life of the coaxial power device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coaxial power device for an unmanned aerial vehicle with an inclination angle, comprising a power main body (1), characterized in that: The outer surface of the power main body (1) is provided with a protective shell (2) for protecting the power part, and the upper and lower sides of the protective shell (2) are provided with connection ports (3). Both ends of the power main body (1) are provided with fixing structures (4) for fixing the position of the motor, and the fixing structure (4) is located in the inner cavity of the connection port (3). The other end of the fixing structure (4) is provided with a drive motor (5), and the end of the drive motor (5) close to the fixing structure (4) is provided with a motor adapter (6), and the side of the motor adapter (6) close to the drive motor (5) is arranged in an inclined surface, and the surface of the motor adapter (6) is provided with a connection structure (7) for convenient connection with the drive motor (5), and the side of the drive motor (5) close to the power main body (1) is arranged in an inclined surface.

2. The coaxial power device for an unmanned aerial vehicle with an inclination angle according to claim 1 is characterized in that: The fixing structure (4) comprises a power adapter (41), and the power adapter (41) is provided in two groups. The two groups of power adapters (41) are symmetrically distributed on the upper and lower sides of the power main body (1). The surface of the motor adapter (6) is provided with a power adapter hole (42) adapted to the power adapter (41), and the inner cavity of the power adapter hole (42) is matched and connected with the power adapter (41).

3. The coaxial power device of a UAV with an inclination angle according to claim 2 is characterized in that: Each group of the power adapters (41) is provided with four, and the four power adapters (41) are all located in the inner cavity of the connecting port (3).

4. The coaxial power device for an unmanned aerial vehicle with an inclination angle according to claim 1 is characterized in that: The outer surface of the driving motor (5) close to the power part is provided with anti-skid grooves (8), and the anti-skid grooves (8) are arranged in a plurality of groups.

5. The coaxial power device for an unmanned aerial vehicle with an inclination angle according to claim 1 is characterized in that: The protective shell (2) comprises a protective sleeve (21), and protective side covers (22) are arranged on both sides of the protective sleeve (21). The protective sleeve (21) and the protective side covers (22) are bolted together by fasteners.

6. The coaxial power device for an unmanned aerial vehicle with an inclination angle according to claim 5 is characterized in that: Heat dissipation fins (9) are provided on both sides of the protective shell (21), and one end of the heat dissipation fin (9) extends to the inner cavity of the protective shell (21).

7. The coaxial power device for an unmanned aerial vehicle with an inclination angle according to claim 1 is characterized in that: The connection structure (7) comprises a fixing hole (71), the fixing hole (71) is opened on the surface of the motor adapter (6), and the inner cavity of the fixing hole (71) is provided with a fixing part (72) for fixing the motor.

8. The coaxial power device for an unmanned aerial vehicle with an inclination angle according to claim 7 is characterized in that: Four groups of fixing holes (71) are provided, and the four groups of fixing holes (71) are symmetrically distributed around the motor adapter (6). One end of the motor adapter (6) is engaged with the inner cavity of the connecting port (3).

9. The coaxial power device for an unmanned aerial vehicle with an inclination angle according to claim 1 is characterized in that: The surface of the drive motor (5) is provided with heat dissipation grooves (10), and the heat dissipation grooves (10) are provided in a plurality of groups, and the plurality of groups of heat dissipation grooves (10) are distributed around the center of a circle on the surface of the drive motor (5).

10. The coaxial power device for an unmanned aerial vehicle with an inclination angle according to claim 1, characterized in that: The protective shell (2) is in a rectangular shape, and the protective shell (2) is provided with beveled surfaces on all four sides.

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