Light-load unmanned aerial vehicle and electric governor heat dissipation device thereof

Abstract

The utility model provides a kind of light load unmanned aerial vehicle and its electric governor heat dissipation device, the electric governor heat dissipation device includes centrifugal fan and anti-collision block;The centrifugal fan is used to be installed in the motor of light load unmanned aerial vehicle, the centrifugal fan is used to be driven to rotate by the motor to suck external cold air into motor interior and generate negative pressure in the direction towards the anti-collision block;The anti-collision block is made of EPP material, for wrapping electric governor module from all around, it is installed on the arm and is equipped with clamping slot and air guide groove in side, the clamping slot is used to nest electric governor module and is equipped in the middle of anti-collision block side face, the air guide groove is connected with clamping slot and gradually increases along the direction of clamping slot to centrifugal fan. Make full use of the flow characteristics of air, realize the rapid transfer and emission of heat, greatly improve the heat dissipation efficiency of electric governor module, prolong the service life of electronic component and motor.

Description

Technical Field

[0001] This utility model relates to the field of light-duty unmanned aerial vehicle (UAV) technology, and in particular to an electrically adjustable heat dissipation device and a light-duty UAV using the electrically adjustable heat dissipation device. 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, an electronic speed controller (ESC) module, and propeller assemblies. The electronic components inside the ESC module operate under high load for extended periods, continuously generating a large amount of heat. However, existing drone heat dissipation structures reveal several shortcomings that urgently need to be addressed. On the one hand, the problem of low heat dissipation efficiency is particularly prominent, failing to effectively dissipate the heat generated by the electronic components and motors in a timely manner. This leads to a continuous increase in the internal temperature of the drone, severely affecting the performance stability and lifespan of the electronic components and motors within the ESC, thereby threatening the overall operational safety of the drone. On the other hand, an unreasonable intake and exhaust layout results in poor airflow, causing severe heat accumulation and further reducing the heat dissipation effect. Utility Model Content

[0003] The primary objective of this invention is to provide an electrically adjustable heat dissipation device with higher heat dissipation efficiency.

[0004] Another objective of this invention is to provide a lightweight unmanned aerial vehicle that utilizes the aforementioned electrically controlled heat dissipation device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: As a first aspect, this utility model provides an electronic speed controller (ESC) cooling device for installation on the arm of a drone to accelerate the heat dissipation of the ESC module. The ESC cooling device includes a centrifugal fan and a crash block. The centrifugal fan is installed inside the motor of the drone and is driven to rotate by the motor to draw in cold air from the outside and generate negative pressure in the direction towards the crash block. The crash block surrounds the ESC module from all sides, is installed on the arm, and has a slot and an air guide groove on its side. The slot is used to nest the ESC module and is located in the middle of the side of the crash block. The air guide groove is connected to the slot and gradually increases in size along the direction from the slot to the centrifugal fan.

[0006] In one embodiment, centrifugal fans are provided at both the upper and lower ends of the drone's arm, and the anti-collision block is installed between the two centrifugal fans. The centrifugal fans are used to generate negative pressure at the upper and lower ends of the anti-collision block respectively; two air guide slots are symmetrically provided on the upper and lower sides of the slot.

[0007] In one embodiment, the anti-collision block is provided with the slots and the air guide slots on both the left and right sides, and the two slots on the anti-collision block are used to install the ESC modules of two motors in a one-to-one correspondence.

[0008] In one embodiment, the anti-collision block includes a first housing disposed at the end of the arm along the length direction of the arm, and two second housings disposed on opposite sides of the arm. The two second housings are detachably connected to the first housing and together enclose a receiving cavity that encloses the end of the arm.

[0009] In one embodiment, an air guide hole is provided on the side of the first housing and / or the second housing facing the centrifugal fan, and the air guide hole communicates with the receiving cavity.

[0010] In one embodiment, the air guide groove includes a first sidewall and a second sidewall disposed opposite to each other. The first sidewall is disposed on a first housing, and the second sidewall is disposed on a second housing. The end of the first sidewall near the slot is inclined in the direction toward the second housing. A limiting wall is also provided on the side of the first sidewall facing the receiving cavity. The limiting wall and the first sidewall together form a limiting groove. The second housing includes a connecting plate for insertion into the limiting groove. The end of the connecting plate abuts against the first sidewall, the inner wall of the connecting plate abuts against the limiting wall, and the outer wall of the connecting plate forms the bottom wall of the air guide groove.

[0011] In one embodiment, the limiting wall has a limiting structure on the side facing the receiving cavity for engaging and limiting with the motor base on the arm. Fixing holes are opened at corresponding positions on the connecting plate and the limiting wall. The connecting plate and the limiting wall are connected and fixed to the motor base by fasteners passing through the fixing holes.

[0012] In one embodiment, the electrically regulated heat dissipation device further includes a quick-release strap, and a connection hole is provided at the end of the second housing away from the first housing. The two second housings are connected into one unit by the quick-release strap passing through the connection hole.

[0013] In one embodiment, the end of the first housing away from the second housing is provided with a drag-reducing ramp that is inclined toward the centrifugal fan.

[0014] In one embodiment, the motor includes a bottom cover, a rotor, and a top cover arranged along the height direction; the bottom cover has an air inlet; 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 a guide plate; the centrifugal fan includes multiple guide vanes arranged inside the guide plate; a figure-eight channel is defined between two adjacent guide vanes; the figure-eight channel gradually increases in size from the center of the guide plate to the edge; when the guide plate is placed on the top of the rotor, the guide vanes are embedded between adjacent connecting ribs and define an air outlet with the connecting ribs; the air inlet, the rotor, and the air outlet form a heat dissipation path for the motor.

[0015] As a second aspect, a lightweight unmanned aerial vehicle (UAV) is provided, including an arm, a motor, an electronic speed controller (ESC) module, and the aforementioned ESC cooling device. The motor is mounted in the height direction of the arm, the ESC module is mounted on the side of the arm and electrically connected to the motor, the centrifugal fan is disposed inside the motor, and the anti-collision block is connected to the arm and wraps around the ESC module from both sides in the height direction and from both sides along the axial direction of the arm.

[0016] Compared with the prior art, the solution of this utility model has the following advantages: In this utility model's electronic speed controller (ESC) cooling device, when the drone's motor rotor is rotating, the centrifugal fan inside the motor generates an exhaust effect. The air intake channel at the bottom of the drone utilizes negative pressure to actively draw in cool outside air into the drone's motor. After the cool air is drawn in, it first cools the heat-generating modules of the electronic components. The EPP foam, acting as a shock absorber, has flared air guide channels corresponding to the ESC module's heat sink. After passing through the heat sink, the airflow rapidly disperses along the flared air guide channels, increasing its velocity. This fully utilizes the airflow characteristics to achieve rapid heat transfer and dissipation, significantly improving the ESC module's cooling efficiency and extending the lifespan of the electronic components and motor.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 A reference diagram showing the usage status of the electrically adjustable heat dissipation device provided in this embodiment of the utility model; Figure 2 for Figure 1 An exploded view of the electrically controlled heat dissipation device shown; Figure 3 for Figure 2 An exploded view of the motor in the image; Figure 4 for Figure 2 A perspective view of the anti-collision block in the electrically adjustable heat dissipation device shown; Figure 5 for Figure 4 An exploded view of the anti-collision block shown; Figure 6 for Figure 4 The diagram shows a cross-sectional view of the anti-collision block. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] Those skilled in the art will understand that, unless specifically stated otherwise, the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, parts, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, parts, components, and / or groups thereof. It should be understood that when we say a part is "connected" to another part, it can be directly connected to the other part, or there may be intermediate parts. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items.

[0021] See Figures 1 to 6 This utility model provides an electronically controlled power supply (ECS) cooling device 100, suitable for installation on the arm 10 of a drone, to dissipate heat from the ESC module 30 of the drone, thereby improving the heat dissipation efficiency of the ESC module 30 and extending its service life. Additionally, a light-duty drone using the aforementioned ESC cooling device is also provided.

[0022] The light-load drone includes an arm 10, motors 20 all mounted on the arm 10, an ESC module 30, and the aforementioned ESC heat dissipation device.

[0023] The robotic arm 10 is preferably made of carbon fiber tubing (i.e., carbon tubing) to reduce the weight of the robotic arm 10 while meeting structural strength requirements.

[0024] The motor 20 is mounted on the arm 10 at its height via a motor mounting base 50.

[0025] The ESC module 30 is installed in the left-right direction of the arm 10 and is electrically connected to the motor 20 and the flight control system on the UAV body to control the rotation of the motor 20.

[0026] When motors 20 are provided on both sides of the boom 10 in the height direction, two electronic speed control modules 30 are provided, respectively located on the left and right sides of the boom 10 and electrically connected to the two motors 20 one by one. It can be understood that the two electronic speed control modules 30 are located between the two motors 20, and preferably, the two electronic speed control modules 30 are symmetrically arranged about the axis of the boom 10.

[0027] The electronic speed controller (ESC) cooling module 100 includes a centrifugal fan and a shock absorber 40. The centrifugal fan is located inside the motor 20 and rotates synchronously with the rotor of the motor 20. The shock absorber 40 surrounds the ESC module 30 from all sides, providing protection. The shock absorber 40 has a slot 41 and an air guide slot 42. The slot 41 is matched to the outer periphery of the ESC module 30, located in the middle of the left and right sides of the shock absorber 40 and extending inward along the sides. The ESC module 30 is clamped in the slot 41. The air guide slot 42 is V-shaped in the height direction, with its thinner end connected to the slot 41 and its thicker end extending towards the motor 20. Preferably, the air guide slot 42 is located at the position corresponding to the heat sink 31 of the ESC module 30.

[0028] Therefore, when the rotor of the drone's motor 20 is rotating, the centrifugal fan inside the motor 20 generates an exhaust effect. The air intake channel at the bottom of the drone utilizes negative pressure to actively draw in cool outside air into the drone's motor 20. After the cool air is drawn in, it first dissipates heat from the electronic components' heat-generating modules. The anti-collision block 40 has flared air guide slots 42 corresponding to the heat sink 31 of the ESC module 30. After passing through the heat sink 31, the airflow quickly disperses along the flared air guide slots 42, increasing the flow rate. This fully utilizes the airflow characteristics to achieve rapid heat transfer and dissipation, significantly improving the heat dissipation efficiency of the ESC module 30 and extending the service life of the electronic components and motor 20.

[0029] In one embodiment, the motor 20 includes a bottom cover 21, a rotor 22, and a top cover 23 arranged along the height direction. The bottom cover 21 has an air inlet; the rotor 22 has multiple connecting ribs 221 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, and multiple guide vanes 231 are provided on the inner side of the guide plate. A figure-eight channel is defined between adjacent guide vanes 231, and the figure-eight channel gradually increases in size from the center to the edge of the guide plate. When the guide plate is placed on the top of the rotor 22, the guide vanes 231 are embedded between adjacent connecting ribs 221, defining an air outlet. The air inlet, rotor, and air outlet form a heat dissipation path for the motor 20. Thus, through the cooperation between the air guide plate at the top of the motor 20 and the connecting rib of the rotor, a centrifugal air outlet structure is formed inside the motor 20. When the rotor of the motor 20 rotates, it can form a centrifugal fan, which draws the airflow from the outside of the bottom cover of the motor 20 into the motor 20 and carries it out of the motor 20, thus removing the heat from the iron core inside the motor 20.

[0030] In one embodiment, the anti-collision block 40 includes a first housing 44 disposed along the axial direction of the arm 10 at the end of the arm 10, and two second housings 45 disposed on opposite sides of the arm 10. The two second housings 45 are detachably connected to the first housing 44 and together form a receiving cavity 46 enclosing the end of the arm 10. Optionally, the first housing 44 and the second housing 45 are connected by a snap-fit ​​and secured with screws. The mounting brackets of the motor mounting base 50 and the ESC module 30 are housed within the receiving cavity 46.

[0031] In one embodiment, the first housing 44 and / or the second housing 45 are provided with air guide holes 43 facing the centrifugal fan. The air guide holes 43 are connected to the receiving cavity 46 so that the air in the receiving cavity 46 can be discharged outward through the air guide holes 43.

[0032] In one embodiment, the air guide trough 42 includes a first sidewall 441 and a second sidewall 451 disposed opposite to each other. The first sidewall 441 is disposed on the first housing 44, and the second sidewall 451 is disposed on the second housing 45. The end of the first sidewall 441 near the slot 41 is inclined in the direction toward the second housing 45. A limiting wall is also provided on the side of the first sidewall 441 facing the receiving cavity 46. The limiting wall and the first sidewall 441 together form a limiting groove. The second housing 45 includes a connecting plate 453 for insertion into the limiting groove. The end of the connecting plate 453 abuts against the first sidewall 441, the inner wall of the connecting plate 453 abuts against the limiting wall, and the outer wall of the connecting plate 453 forms the bottom wall of the air guide trough 42.

[0033] In one embodiment, the limiting wall is provided with a limiting structure on the side facing the receiving cavity 46 for engaging and limiting with the motor base on the arm 10. Fixing holes are provided at corresponding positions on the connecting plate 453 and the limiting wall. The connecting plate 453 and the limiting wall are connected and fixed to the motor base by fasteners passing through the fixing holes.

[0034] In one embodiment, the electrically regulated heat dissipation device further includes a quick-release strap 47, and a connection hole 452 is provided at one end of the second housing 45 away from the first housing 44. The two second housings 45 are connected into one unit by the quick-release strap 47 passing through the connection hole 452.

[0035] In one embodiment, the end of the first housing 44 away from the second housing 45 is provided with a drag-reducing inclined surface 442 that is tilted toward the centrifugal fan to reduce wind resistance and ensure smooth flight.

[0036] The anti-collision block 40 is made of EPP material, which is lightweight, easy to manufacture, and has high strength, thus improving flight efficiency; its compact structure reduces external exposed parts; and its compact structure reduces material usage and processing technology, thereby lowering production costs.

[0037] The motor mounting base 50 has two motor mounts corresponding to the two motors 20, specifically an upper motor mount and a lower motor mount. Both the upper and lower motor mounts have clamping openings that mate with the outer periphery of the arm 10 to jointly clamp the arm 10. The two motor mounts are fastened together with fastening screws. At the opposite ends of the two motor mounts, one motor mount has a positioning block, and the other motor mount has a positioning groove. The positioning of the two motor mounts is achieved by placing the positioning block into the positioning groove. A preset height (e.g., greater than 1 mm) assembly gap is formed between the two motor mounts, which allows for a more secure connection between the two motor mounts and the carbon tube, ensuring the stability and safety of the UAV's power system. Understandably, the assembly gap should not be too large to maintain a compact power system structure.

[0038] Weight reduction slots 51 are provided on both the left and right sides of the upper and lower motor mounts. An ESC mounting bracket 60 is fitted into each weight reduction slot 51, and the ESC module 30 is fixed to the ESC mounting bracket 60. Preferably, the ESC module 30 is connected to both the upper and lower ESC mounting brackets 60.

[0039] Compared to traditional drones, the heat dissipation module in this drone has the following advantages: (1) High heat dissipation efficiency: The integrated intake and exhaust circulation design enables precise thermal management. ① Improved heat exchange efficiency: The operating temperature of electronic components is significantly reduced, effectively suppressing the negative impact of heat accumulation on the performance of electronic components.

[0040] ② Extended lifespan and performance assurance: Extended lifespan of electronic components provides reliable heat dissipation support for high-performance operation of drones, reducing performance degradation or failure caused by overheating.

[0041] (2) Ease of disassembly and assembly: The modular design and quick-connect structure enable efficient operation and maintenance. ① Modular design: The drone is divided into multiple functional independent modules, each with standardized interfaces and dimensions, which facilitates production, assembly and maintenance.

[0042] ② Quick-connect structure: Adopting advanced technologies such as snap-fit ​​connection and threaded self-locking connection, it can achieve quick assembly and disassembly while ensuring connection strength.

[0043] (3) Compact structure: Topology optimization and lightweight design are used to achieve efficient space utilization. ① Optimization of size and weight: While meeting functional requirements such as power and heat dissipation, the module size and weight were minimized as much as possible. This reduced the overall size of the drone, lowered flight drag, and improved energy efficiency.

[0044] ② Spatial Integration and Structural Compactness: Through rational space utilization and structural integration, multiple functional modules are compactly combined. This enhances the maneuverability and flexibility of UAVs, enabling them to better adapt to different flight environments and mission requirements, and expanding their application areas.

[0045] ③ Reduced processing costs: Effectively reduced material usage, resulting in a significant decrease in overall processing costs.

[0046] (4) Reinforcing rib design: The ring-shaped reinforcing rib design optimizes the load distribution and enhances the load-bearing capacity, thus achieving lightweight design. ① Optimize load distribution: The load on the upper boom is scientifically redistributed through ring-shaped reinforcing ribs, so that the load is evenly transmitted, avoiding local stress concentration and improving the load-bearing stability of the boom.

[0047] ②Enhanced load-bearing capacity: Significantly increases the upper limit of the arm's load-bearing capacity, ensuring the arm remains stable when bearing heavy loads and guaranteeing the structural reliability of the UAV under complex missions.

[0048] ③ Achieve lightweight design: While strengthening the structure, reasonable design and materials are used to not only significantly reduce the overall weight of the drone, but also improve energy efficiency and flight endurance.

[0049] The above description is only a partial embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electronically controlled power supply (ECS) heat dissipation device, used for mounting on the arm of a drone to accelerate the heat dissipation of the ESC module, characterized in that, The electrically adjustable heat dissipation device includes a centrifugal fan and a shock-absorbing block; The centrifugal fan is installed inside the motor of the drone. The centrifugal fan is driven to rotate by the motor to draw in cold air from the outside and generate negative pressure in the direction of the anti-collision block. The anti-collision block is made of EPP material and is used to wrap the ESC module from all sides. It is installed on the arm and has a slot and an air guide channel on the side. The slot is used to nest the ESC module and is located in the middle of the side of the anti-collision block. The air guide channel is connected to the slot and gradually increases in size along the direction from the slot to the centrifugal fan.

2. The electrically adjustable heat dissipation device according to claim 1, characterized in that, The drone has centrifugal fans at both the upper and lower ends of its arms. The anti-collision block is installed between the two centrifugal fans. The centrifugal fans are used to generate negative pressure at the upper and lower ends of the anti-collision block respectively. Two air guide slots are symmetrically arranged on the upper and lower sides of the slot.

3. The electrically adjustable heat dissipation device according to claim 2, characterized in that, The anti-collision block is provided with slots and air guides on both its left and right sides. The two slots on the anti-collision block are used to install the ESC modules of two motors in a one-to-one correspondence.

4. The electrically adjustable heat dissipation device according to claim 1, characterized in that, The anti-collision block includes a first housing disposed at the end of the arm along the length direction of the arm, and two second housings disposed on opposite sides of the arm. The two second housings are detachably connected to the first housing and together form a receiving cavity that encloses the end of the arm.

5. The electrically adjustable heat dissipation device according to claim 4, characterized in that, An air guide hole is provided on the side of the first housing and / or the second housing facing the centrifugal fan, and the air guide hole communicates with the receiving cavity.

6. The electrically adjustable heat dissipation device according to claim 4, characterized in that, The air guide duct includes a first sidewall and a second sidewall disposed opposite to each other, the first sidewall being disposed on the first housing and the second sidewall being disposed on the second housing; The first sidewall is inclined at one end near the slot towards the second housing, and a limiting wall is also provided on the side of the first sidewall facing the receiving cavity. The limiting wall and the first sidewall together form a limiting groove. The second housing includes a connecting plate for insertion into the limiting groove, the end of the connecting plate abutting the first side wall, the inner wall of the connecting plate abutting the limiting wall, and the outer wall of the connecting plate forming the bottom wall of the air guide groove.

7. The electrically adjustable heat dissipation device according to claim 6, characterized in that, The limiting wall is provided with a limiting structure on the side facing the receiving cavity for engaging and limiting with the motor base on the arm. Fixing holes are provided at corresponding positions on the connecting plate and the limiting wall. The connecting plate and the limiting wall are connected and fixed to the motor base by fasteners passing through the fixing holes.

8. The electrically adjustable heat dissipation device according to claim 4, characterized in that, It also includes a quick-release strap, and the second housing has a connection hole at the end away from the first housing. The two second housings are connected into one piece by passing the quick-release strap through the connection hole.

9. The electrically adjustable heat dissipation device according to claim 4, characterized in that, The first housing has a drag-reducing slope at the end away from the second housing that is inclined toward the centrifugal fan.

10. The electrically adjustable heat dissipation device according to claim 1, characterized in that, The motor includes a bottom cover, a rotor, and a top cover arranged along the height direction; the bottom cover has an air inlet; the top of the rotor has multiple connecting ribs arranged radially; the top cover is connected to the rotor and rotates synchronously with the rotor; the top cover includes a guide plate; the centrifugal fan includes multiple guide vanes arranged inside the guide plate; an eight-shaped channel is defined between two adjacent guide vanes; the eight-shaped channel gradually increases in size from the center of the guide plate to the edge; when the guide plate is placed on the top of the rotor, the guide vanes are embedded between adjacent connecting ribs and define an air outlet with the connecting ribs; the air inlet, the rotor, and the air outlet form a heat dissipation path for the motor.

11. A lightweight unmanned aerial vehicle (UAV), comprising arms, motors, and an electronic speed controller module, characterized in that, It also includes the electronically controlled cooling device as described in any one of claims 1 to 10, wherein the motor is mounted in the height direction of the machine arm, the electronically controlled module is mounted on the side of the machine arm and electrically connected to the motor, the centrifugal fan is disposed inside the motor, and the anti-collision block is connected to the machine arm and wraps around the electronically controlled module from both sides in the height direction and from both sides along the axial direction of the machine arm.

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