Unmanned aerial vehicle and its heat dissipation circulating unmanned aerial vehicle power system

Abstract

The utility model provides a kind of unmanned aerial vehicle and heat dissipation circulation type unmanned aerial vehicle power system, wherein power system includes arm, motor and electric governor;The arm is circular pipe fitting;The motor is installed above arm, motor is equipped with air inlet hole in the end close to arm, motor is equipped with air outlet in the end away from arm, and centrifugal air outlet structure that air current is guided from air inlet hole to air outlet is formed in motor;The electric governor is electrically connected with motor, and the electric governor is fixed in one side of the left and right sides of arm, the electric governor has heat dissipation tooth extending along the axis of arm, and heat dissipation passageway is defined between heat dissipation tooth and air inlet hole and air outlet. The area between motor and electric governor is formed negative pressure using centrifugal air outlet structure, drives air flow here, forms a heat dissipation cycle, and the electric governor heat dissipation tooth located in the side of arm can fully utilize this part of cycle to heat dissipation internal electronic components, improve heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and more specifically, to a UAV and its heat dissipation and circulation type UAV power system. Background Technology

[0002] With the development of drone technology, drones are being increasingly widely adopted and used in various fields such as aerial photography, reconnaissance, entertainment, and education. In drone design, the power system is particularly critical. The drone's power system consists of a motor, electronic speed controller (ESC), and propeller assembly. The motor and ESC generate a significant amount of heat during operation, which needs to be dissipated promptly; otherwise, it will accelerate the aging of electronic components and shorten the lifespan of the motor and ESC. Traditional power systems rely solely on the downward airflow generated by the propeller blades for ESC cooling, neglecting the airflow cooling circulation within the motor section, thus failing to fully integrate and utilize this energy, resulting in low cooling efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a heat dissipation cycle-type unmanned aerial vehicle (UAV) power system with high heat dissipation efficiency and a UAV using this power system.

[0004] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a heat dissipation and circulation type unmanned aerial vehicle (UAV) power system, including a motor and an electronic speed controller (ESC). The motor is mounted on the upper part of the UAV arm, with an air inlet at the end of the motor near the arm and an air outlet at the end of the motor away from the arm. A centrifugal air outlet structure is formed inside the motor to guide airflow from the air inlet to the air outlet. The ESC is electrically connected to the motor and is fixed to one side of the left and right sides of the UAV arm. The ESC has heat dissipation teeth extending along the axial direction of the UAV arm, and the heat dissipation teeth define a heat dissipation path between the air inlet and the air outlet.

[0005] In one embodiment, the motor includes a bottom cover, a rotor, and a top cover arranged sequentially along the height direction; the air inlet is opened on the bottom cover; the top of the rotor is provided with a plurality of connecting ribs in a radial pattern; the top cover is connected to the rotor and rotates synchronously with the rotor, the top cover includes an air guide plate, and the centrifugal air outlet structure includes a plurality of air guide vanes distributed on the inner side of the air guide plate and defining a figure-eight channel between each pair, the air guide vanes being embedded between adjacent connecting ribs and defining the air outlet with the connecting ribs when the air guide plate is placed on the top of the rotor.

[0006] In one embodiment, the power system further includes an upper arm and an ESC mounting bracket. The upper arm is fixed above the machine arm during installation, the motor is fixed to the end of the upper arm away from the machine arm, the ESC mounting bracket is fixed to the upper arm, and the ESC is mounted on the ESC mounting bracket.

[0007] In one embodiment, the ESC mounting bracket includes a mounting plate and two fixing plates respectively disposed on opposite sides of the mounting plate. The fixing plates are fixed to both ends of the upper arm along the axial direction of the arm, and the ESC is mounted on the mounting plate.

[0008] In one embodiment, the upper arm has a pair of triangular perforated holes, each of which extends along the arm's axial direction and penetrates the upper arm. The triangular perforated holes are arranged along the left-right direction of the arm. The upper arm has a weight-reducing cavity, which extends from the end of the upper arm away from the arm to the end closer to the arm. The weight-reducing cavity has reinforcing ribs, which extend along the arm's axial direction and connect to the opposite sidewalls of the weight-reducing cavity.

[0009] In one embodiment, the upper arm has a first semi-circular clamping opening at the end away from the motor that mates with the outer periphery of the arm; the upper arm has weight-reducing grooves on both sides of the first semi-circular clamping opening, and a screw hole extending through to the end face of the upper arm is provided at the end of the weight-reducing groove near the arm; the power system also includes a lower arm, which has a second semi-circular clamping opening that mates with the outer periphery of the arm, and screw holes are provided on both sides of the second semi-circular clamping opening. Fastening screws pass through the screw holes of the lower arm and are connected to the screw holes of the upper arm, so that the lower arm and the upper arm can fix and clamp the arm together.

[0010] In one embodiment, the upper arm extends toward one end of the lower arm to form a positioning block, and the positioning block has positioning holes that penetrate through its left and right ends; the lower arm has a positioning groove at a position corresponding to the positioning block, and the positioning block is embedded in the positioning groove; the arm has a connecting hole corresponding to the positioning hole, and the upper arm is also connected to the arm by means of a positioning pin passing through the connecting hole and the positioning hole.

[0011] In one embodiment, the power system further includes a limiting plate, one end of which is inserted into a limiting groove protruding from the end of the upper arm of the machine arm, and the other end of which is fixed to the position corresponding to the reinforcing rib on the upper arm.

[0012] In one embodiment, there is a pre-set assembly gap between the end of the upper arm and the lower arm.

[0013] As a second aspect, the present invention also provides an unmanned aerial vehicle (UAV) that includes the aforementioned heat dissipation and circulation type UAV power system.

[0014] The beneficial effects of the technical solution provided by this utility model are as follows: In the power system of this utility model, by installing the motor above the machine arm and installing the ESC on one side of the left or right side of the machine arm, a centrifugal air outlet structure is formed inside the motor. When the motor rotor rotates, it can form a centrifugal fan, drawing the airflow below the motor into the motor and carrying it out of the motor, thus removing the heat from the iron core inside the motor. As the airflow in the space below the motor is carried away, a negative pressure is formed in the channel between the motor and the ESC, which drives the airflow here and forms a heat dissipation cycle. The heat dissipation teeth of the ESC located on the side of the machine arm can make full use of this part of the cycle to dissipate heat from the internal electronic components, thereby improving the heat dissipation efficiency of the power system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below.

[0016] Figure 1 A three-dimensional structural diagram of a heat dissipation circulation type UAV power system provided in one embodiment of the present invention; Figure 2 for Figure 1 A three-dimensional view of the heat dissipation circulation type UAV power system from another perspective; Figure 3 for Figure 1 The diagram shows the structure of a heat dissipation circulation type UAV power system without the protective cover. Figure 4 This is a schematic diagram of the assembly structure between the machine arm, upper machine arm and ESC mounting frame provided in one embodiment of the present utility model; Figure 5 This is a schematic diagram of the structure of the air guide plate provided in one embodiment of the present utility model; Figure 6 This is a schematic diagram of the upper arm provided in one embodiment of the present invention; Figure 7 This is a schematic diagram of the lower arm provided in one embodiment of the present invention. Detailed Implementation

[0017] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0018] It should be understood that the steps described in the method embodiments of this utility model may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this utility model is not limited in this respect.

[0019] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "connection" can refer to a direct connection or an indirect connection via intermediate components (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0020] See Figures 1 to 7 This utility model provides a heat dissipation and circulation type unmanned aerial vehicle (UAV) power system 100 (hereinafter referred to as "power system 100"), which is installed on the UAV arm 10 and electrically connected to the UAV's flight control system. The power system 100 includes a motor 20 and an electronic speed controller (ESC) 30. The motor 20 and the ESC 30 are both installed at the end of the arm 10 and form an integral structure with the arm 10. The ESC 30 is electrically connected to the motor 20 through wires to control the rotation of the motor 20.

[0021] The robotic arm 10 is a circular tube, preferably made of carbon fiber tubing (i.e., carbon tubing) to reduce the weight of the robotic arm 10 while meeting structural strength requirements.

[0022] The motor 20 is installed above the arm 10. The end of the motor 20 near the arm 10 is provided with an air inlet 25, and the end of the motor 20 away from the arm 10 is provided with an air outlet. A centrifugal air outlet structure 29 is formed inside the motor 20 to guide the airflow from the air inlet 25 to the air outlet.

[0023] The ESC 30 is electrically connected to the motor 20. The ESC 30 is fixed to one side of the left and right sides of the arm 10. The ESC 30 has heat dissipation teeth 32 extending along the axial direction of the arm 10. The heat dissipation teeth 32 define a heat dissipation passage between the air inlet 25 and the air outlet.

[0024] In one embodiment, the motor 20 includes a bottom cover 21, a rotor 22, and a top cover 23 arranged sequentially along the height direction. An air inlet 25 is formed on the bottom cover 21; the rotor 22 has multiple connecting ribs 292 arranged radially at its top. The top cover 23 is connected to the rotor and rotates synchronously with it. The top cover 23 includes a guide plate 291. The centrifugal air outlet structure includes multiple guide vanes 2911 disposed inside the guide plate 291. A figure-eight channel is defined between adjacent guide vanes 2911. The figure-eight channel gradually increases in size from the center to the edge of the guide plate 291. When the guide vane 2911 is placed on the top of the rotor 22, it is embedded between adjacent connecting ribs 292, and the connecting ribs 292 define the air outlet.

[0025] Therefore, by mounting the motor 20 above the arm 10 and the ESC 30 on one side of the arm 10, a centrifugal exhaust structure 29 is formed inside the motor 20. This structure acts as a centrifugal fan when the motor 20 rotor rotates, drawing airflow from below the motor 20 into the motor 20 and carrying it out, thus removing heat from the internal iron core. Because the airflow below the motor 20 is carried away, a negative pressure is created in the channel between the motor 20 and the ESC 30, causing airflow and forming a cooling cycle. The cooling fins 32 of the ESC 30, located on the side of the arm 10, can fully utilize this cycle to cool the internal electronic components. Through this rational integrated design, the ESC 30 can achieve cooling through both the downward airflow generated by the rotating blades and the airflow circulation of the motor 20 components, significantly improving the cooling efficiency of the ESC 30 and extending the lifespan of the electronic components.

[0026] Please combine Figure 3 In one embodiment, the power system 100 further includes an upper arm 40 and an ESC mounting bracket 50. The upper arm 40 is fixed above the arm 10 along the arm 10. The motor 20 is fixed to the end of the upper arm 40 away from the arm 10. The ESC mounting bracket 50 is fixed to the upper arm 40. The ESC 30 is mounted on the ESC mounting bracket 50. The cables 31 (power line and signal line) of the ESC 30 extend from the end of the arm 10 into the interior of the arm 10 and extend through the interior of the arm 10 to be electrically connected to the flight control system.

[0027] In the power system 100 of this utility model, the electronic speed controller (ESC) 30 can be mounted on the upper arm 40, thereby being installed on the side of the carbon tube. The upper arm 40 can be installed on the carbon tube by fastening screws, eliminating the need to cut grooves in the carbon tube for installation and ensuring the structural strength of the carbon tube. At the same time, the power and signal lines led out from the ESC 30 module can directly extend into the interior of the carbon tube from the port, reducing the weight of the wiring while also preventing damage to the structural strength of the carbon tube.

[0028] In one embodiment, the ESC mounting bracket 50 is generally U-shaped, clamping both ends of the upper arm 40 along the axial direction of the arm 10. Specifically, the ESC mounting bracket 50 includes a mounting plate 51 and two fixing plates 52 respectively disposed on opposite sides of the mounting plate 51. The fixing plates 52 are fixed to both ends of the upper arm 40 along the axial direction of the arm 10, and the ESC 30 is mounted on the mounting plate 51.

[0029] In one embodiment, the upper arm 40 has a pair of triangular hollow holes 42, each triangular hollow hole 42 extending along the axial direction of the arm 10 and penetrating the upper arm 40, and the triangular hollow holes 42 are arranged in the left and right direction of the arm 10; the upper arm 40 has a weight reduction cavity 43, the weight reduction cavity 43 extends from the end of the upper arm 40 away from the arm 10 to the end closer to the arm 10, the weight reduction cavity 43 is provided with a reinforcing rib 44, the reinforcing rib 44 extends along the axial direction of the arm 10 and connects to the opposite sidewall of the weight reduction cavity 43.

[0030] In one embodiment, the upper arm 40 has a first semi-circular clamping opening 41 at the end away from the motor 20, which mates with the outer periphery of the arm 10. The upper arm 40 has weight-reducing grooves 45 on both sides of the first semi-circular clamping opening 41, and a screw hole extending through to the end face of the upper arm 40 is provided at the end of the weight-reducing groove 45 near the arm 10. The power system 100 also includes a lower arm 60, which has a second semi-circular clamping opening 61 that mates with the outer periphery of the arm 10. Screw holes are provided on both sides of the second semi-circular clamping opening 61, and fastening screws pass through the screw holes of the lower arm 60 and connect to the screw holes of the upper arm 40, thereby fixing the arm 10 between the lower arm 60 and the upper arm 40.

[0031] Therefore, the upper arm 40 employs a unique hollow design: First, the front side of the upper arm 40 uses a double-triangular hollow design, minimizing weight while maintaining stability; second, the sides of the upper arm 40 retain a solid surface, allowing for more even load distribution, and the groove (weight-reducing groove 45) further controls weight; additionally, the ends of the upper arm 40 are hollowed out for weight reduction while retaining reinforcing ribs 44, enhancing the deformation resistance of the upper arm 40. These meticulous hollow designs maintain structural strength while significantly reducing the weight of the upper arm 40, allowing the arm 10 to maintain structural stability even during prolonged operation of the power system 100.

[0032] In one embodiment, the upper arm 40 extends toward one end of the lower arm 60 to form a positioning block 46, and the positioning block 46 has positioning holes that penetrate through its left and right ends; the lower arm 60 has a positioning groove 62 at a position corresponding to the positioning block 46, and the positioning block 46 is embedded in the positioning groove 62; the arm 10 has a connecting hole corresponding to the positioning hole, and the upper arm 40 is also connected to the arm 10 by means of a positioning pin passing through the connecting hole and the positioning hole, thereby completing the circumferential limiting between the upper arm 40 and the arm 10, so that the upper arm 40 is always perpendicular to the axis of the arm 10, thereby ensuring that the power system 100 remains substantially perpendicular to the carbon tube.

[0033] In one embodiment, the end of the arm 10 protrudes from the end of the upper arm 40 and is provided with a limiting groove. A limiting piece 11 is embedded in the limiting groove, and the other end of the limiting piece 11 is fixed to the position corresponding to the reinforcing rib 44 on the upper arm 40. This achieves axial fixation between the upper arm 40 and the arm 10, preventing the upper arm 40 from sliding along the axis of the arm 10 during drone use and ensuring the normal operation of the drone.

[0034] In one embodiment, a pre-set assembly gap 111 is provided between the end of the upper arm 40 and the lower arm 60. This assembly gap 111 is preferably greater than 1 mm, which allows for a more secure connection between the upper arm 40, the lower arm 60, and the carbon tube, ensuring the stability and safety of the power system 100. Understandably, the assembly gap 111 should not be too large to maintain a compact structure for the power system 100.

[0035] Furthermore, the power system 100 of this utility model also includes a protective cover 70, which is connected to the arm 10, covers the end of the arm 10 and the cable 31 of the ESC 30 from the end of the arm 10, and extends to the other side of the arm 10 opposite to the ESC 30, so that the power system 100 has a better protective function and decorative effect.

[0036] As a second aspect, the present invention also provides a drone, which includes an arm 10 made of carbon tubing and the aforementioned heat dissipation circulation type drone power system 100 disposed on the arm 10. Because the power system 100 has high heat dissipation efficiency, the heat generated by the electronic components in the motor 20 and ESC 30 can be dissipated in time, avoiding the aging of electronic components due to temperature effects and extending the service life of the power system 100.

[0037] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of the utility model in this utility model that have similar functions.

[0038] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A heat dissipation and circulation type unmanned aerial vehicle (UAV) power system for mounting on an arm, characterized in that, Including motors and ESCs; The motor is installed above the machine arm. The end of the motor near the machine arm is provided with an air inlet, and the end of the motor away from the machine arm is provided with an air outlet. A centrifugal air outlet structure is formed inside the motor to guide the airflow from the air inlet to the air outlet. The ESC is electrically connected to the motor. The ESC is fixed on one side of the left and right sides of the arm. The cable of the ESC is bent and extends from the end of the arm into the arm and extends along the arm to be electrically connected to the flight control system of the UAV. The ESC has heat dissipation teeth that extend along the arm axis. The heat dissipation teeth define a heat dissipation path between the air inlet and the air outlet.

2. The heat dissipation circulation type UAV power system according to claim 1, characterized in that, The motor includes a bottom cover, a rotor, and a top cover arranged sequentially along the height direction; The air intake is located on the bottom cover; The rotor has multiple connecting ribs arranged radially at its top end; The top cover is connected to the rotor and rotates synchronously with the rotor. The top cover includes an air guide plate. The centrifugal air outlet structure includes multiple air guide vanes distributed on the inner side of the air guide plate and defining a figure-eight channel between each pair. When the air guide plate is placed on the top of the rotor, the air guide vanes are embedded between adjacent connecting ribs and define the air outlet with the connecting ribs.

3. The heat dissipation circulation type UAV power system according to claim 1, characterized in that, It also includes an upper arm and an ESC mounting bracket. The upper arm is fixed above the machine arm during installation. The motor is fixed to the end of the upper arm away from the machine arm. The ESC mounting bracket is fixed to the upper arm and the ESC is mounted on the ESC mounting bracket.

4. The heat dissipation circulation type UAV power system according to claim 3, characterized in that, The ESC mounting frame includes a mounting plate and two fixing plates respectively disposed on opposite sides of the mounting plate. The fixing plates are fixed to both ends of the upper arm along the axial direction of the arm, and the ESC is mounted on the mounting plate.

5. The heat dissipation circulation type UAV power system according to claim 3, characterized in that, The upper arm has a pair of triangular hollow holes, each of which extends along the arm axis and penetrates the upper arm. The triangular hollow holes are arranged along the left and right directions of the arm. The upper arm has a weight reduction cavity, which extends from the end of the upper arm away from the arm to the end closer to the arm. The weight reduction cavity is provided with reinforcing ribs, which extend along the arm axis and connect to the opposite sidewalls of the weight reduction cavity.

6. The heat dissipation circulation type UAV power system according to claim 5, characterized in that, The end of the upper arm away from the motor has a first semi-circular clamping opening that mates with the outer periphery of the arm; The upper arm has weight reduction grooves on both sides of the first semi-circular clamping opening, and a screw hole extending through to the end face of the upper arm is provided at the end of the weight reduction groove near the arm. It also includes a lower arm, which has a second semi-circular clamping opening that mates with the outer periphery of the arm, and screw holes are provided on both sides of the second semi-circular clamping opening. The lower arm is connected to the upper arm by means of fastening screws passing through the screw holes of the lower arm, so as to fix and clamp the arm together by the lower arm and the upper arm.

7. The heat dissipation circulation type UAV power system according to claim 6, characterized in that, The upper arm extends toward the lower arm to form a positioning block, and the positioning block has positioning holes that penetrate its left and right ends; The lower arm is provided with a positioning groove at the position corresponding to the positioning block, and the positioning block is embedded in the positioning groove; The arm has a connecting hole corresponding to the positioning hole, and the upper arm is connected to the arm by means of a positioning pin passing through the connecting hole and the positioning hole.

8. The heat dissipation circulation type UAV power system according to claim 7, characterized in that, It also includes a limiting piece, one end of which is inserted into a limiting groove protruding from the end of the upper arm of the machine arm, and the other end of which is fixed to the position corresponding to the reinforcing rib on the upper arm.

9. The heat dissipation circulation type UAV power system according to claim 5, characterized in that, There is a pre-set assembly gap between the end of the upper arm and the lower arm.

10. A drone, characterized in that, The cooling cycle type unmanned aerial vehicle power system includes any one of claims 1 to 9.

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