Cooling device of unmanned helicopter

Abstract

The invention relates to a heat dissipation device of an unmanned helicopter, belongs to the technical field of unmanned helicopters, and solves the problem that in the prior art, in order to drive a heat dissipation fan of the unmanned helicopter, a series of energy conversion from mechanical energy to electric energy, from electric energy to chemical energy and from chemical energy to electric energy needed by the fan needs to be carried out, and a large amount of energy loss is caused. The cooling device comprises a transfer mechanism, a transmission mechanism and a fan, the transmission mechanism is arranged between the transfer mechanism and the fan, the transfer mechanism is used for being connected with an engine of the unmanned helicopter, part of power of the engine is transmitted to the fan through the transmission mechanism, and the fan is driven to rotate to cool a radiator. According to the heat dissipation device, part of mechanical energy of the engine of the unmanned helicopter is directly transmitted to the fan, a series of energy conversion from mechanical energy to electric energy, from electric energy to chemical energy and from chemical energy to electric energy needed by the fan is not needed, and energy loss is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of unmanned helicopters, and in particular relates to a heat dissipation device for an unmanned helicopter. Background Art

[0002] Current unmanned helicopters are primarily powered by piston engines, which generate significant heat during operation, leading to high engine temperatures. To maintain proper engine operation, heat dissipation is essential. Therefore, unmanned helicopters are equipped with both a water-cooled radiator and an intercooler to dissipate heat simultaneously. A fan mounted on the radiator accelerates air flow, improving heat dissipation efficiency.

[0003] Unmanned helicopters are equipped with a dedicated generator, driven by the engine or transmission system. The generated electricity is stored in batteries and then supplied to avionics and cooling fans. To meet the power demands of these devices, the generator needs to have sufficient power and the battery needs to have sufficient capacity, which results in a relatively large size and weight.

[0004] Therefore, in order to drive the cooling fan, the mechanical energy of the piston engine must first be converted into the electrical energy of the generator, then the electrical energy of the generator must be converted into the chemical energy of the battery, and then the chemical energy of the battery must be converted into the electrical energy required by the fan, resulting in a large amount of energy loss. Summary of the Invention

[0005] In view of the above analysis, an embodiment of the present invention aims to provide a heat dissipation device for an unmanned helicopter to solve the problem in the prior art that in order to drive the cooling fan of the unmanned helicopter, a series of energy conversions from mechanical energy to electrical energy, electrical energy to chemical energy, and chemical energy to electrical energy required by the fan are required, resulting in a large amount of energy loss.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions:

[0007] A heat dissipation device for an unmanned helicopter comprises a transfer mechanism, a transmission mechanism and a fan. The transmission mechanism is arranged between the transfer mechanism and the fan. The transfer mechanism is used to connect to the engine of the unmanned helicopter, transfer part of the engine power to the fan through the transmission mechanism, and drive the fan to rotate to cool the radiator. The heat dissipation device of the unmanned helicopter directly transfers part of the mechanical energy of the unmanned helicopter's engine to the fan.

[0008] Furthermore, the transfer mechanism includes a transfer case, a coupling and a transfer shaft, the coupling is arranged between the transfer case and the transfer shaft, the transfer case is connected to the engine, and is used to output part of the engine's power to the coupling and the transfer shaft, and the transfer shaft is used to connect the transmission mechanism and transmit power to the transmission mechanism.

[0009] Furthermore, the transmission mechanism includes an input wheel, a transmission member and an output unit, the input wheel is connected to the transfer shaft, the transmission member is arranged on the input wheel and the output unit, the output unit is connected to the fan, the transfer shaft can drive the input wheel and transmit the rotation to the output unit through the transmission member, and then drive the fan to rotate.

[0010] Furthermore, the transmission member is a flexible transmission member.

[0011] Furthermore, the transmission member is a transmission belt or a transmission chain.

[0012] Furthermore, the output unit includes an output component, a tensioning component and a locking component. The tensioning component is sleeved on the output component. The transmission member can be connected to the output component to transmit the rotation of the input wheel to the output component. The tensioning component is used to adjust the distance between the input wheel and the output component, thereby adjusting the tension of the transmission member.

[0013] Furthermore, the output assembly includes a first output wheel and an output shaft, the first output wheel is arranged at one end of the output shaft, and the first output wheel is coaxial with the output shaft; the transmission member can be connected to the first output wheel and transmit the rotation of the input wheel to the first output wheel.

[0014] Furthermore, the tensioning assembly includes a first tensioning sleeve, which is sleeved on the output shaft and can be rotatably connected to the locking assembly.

[0015] Furthermore, the central axis of the input wheel, the central axis of the output shaft and the central axis of the first tensioning sleeve are parallel, but are not coaxial.

[0016] Furthermore, the output unit further includes a locking assembly, and the locking assembly includes a sleeve.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] (1) The heat dissipation device of the present invention directly transfers part of the mechanical energy of the unmanned helicopter engine to the fan, without undergoing a series of energy conversions from mechanical energy to electrical energy, electrical energy to chemical energy, and chemical energy to electrical energy required by the fan, thereby reducing energy loss;

[0019] (2) The output unit of the present invention includes an output assembly and a tensioning assembly. The tensioning assembly is sleeved on the output assembly. The transmission member can be set on the output assembly to transmit the rotation of the input wheel to the output assembly. The tensioning assembly is used to adjust the distance between the input wheel and the output assembly, thereby adjusting the tensioning degree of the transmission member. The transmission member of this embodiment only needs to be connected to the input wheel and the first output wheel of the output assembly, a total of two wheels, and the tensioning degree of the transmission member can be adjusted by the tensioning assembly sleeved on the output assembly, eliminating the tensioning wheel of the prior art. The heat dissipation device of the present invention takes up little space in the unmanned helicopter, saving the body space of the unmanned helicopter.

[0020] (3) The central axis of the input wheel and the central axis of the output shaft of the present invention are parallel to the central axis of the first tensioning sleeve, but are not coaxial; circumferential rotation of the first tensioning sleeve can cause the output shaft to rotate around the central axis of the first tensioning sleeve, thereby changing the wheelbase between the first output wheel and the input wheel, thereby achieving the purpose of adjusting the tension of the transmission member;

[0021] (4) The rotation of the input wheel of the present invention can be transmitted to the second output wheel through the transmission member, and then transmitted to the output gear through the transmission teeth, thereby driving the output shaft to rotate, thereby achieving the purpose of transmission from the input wheel to the output shaft; the central axis of the input wheel, the central axis of the output shaft and the central axis of the second tensioning sleeve are parallel, but are not coaxial; circumferential rotation of the second tensioning sleeve can cause the second output wheel to rotate around the central axis of the output shaft and the seat cylinder, thereby changing the wheelbase between the second output wheel and the input wheel, thereby achieving the purpose of adjusting the tension of the transmission member without changing the position of the output shaft;

[0022] (5) The worm of the present invention can mesh with the gear portion to form a worm gear pair. When the worm stops rotating, the worm gear pair can self-lock. The worm can keep the position of the second tensioning sleeve unchanged at any time, and the tensioning adjustment is convenient and quick.

[0023] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following content, and some advantages will become apparent from the description or be learned through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained as particularly pointed out in the text and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0025] Figure 1 Schematic diagram of the overall structure of the heat dissipation device;

[0026] Figure 2 Schematic diagram of the overall structure of the output unit of Example 1;

[0027] Figure 3 This is a schematic diagram of the overall structure of the output assembly and the tensioning assembly of Example 1;

[0028] Figure 4 Schematic diagram of the overall structure of the output unit of Example 2;

[0029] Figure 5 Schematic diagram of the decomposition structure of the output unit of Example 2.

[0030] Reference numerals:

[0031] 1-transfer mechanism; 2-transmission mechanism; 3-fan; 11-transfer case; 12-coupling; 13-transfer shaft; 21-input pulley; 22-transmission member; 23-output unit; 100-body; 231-first output wheel; 232-output shaft; 233-first tensioning sleeve; 234-adjusting frame; 235-sleeve; 236-fastener; 237-output gear; 238-second tensioning sleeve; 239-second output wheel; 240-seat cylinder; 241-gear part; 242-worm; 243-worm bracket. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0033] Example 1:

[0034] A specific embodiment of the present invention, as Figure 1 As shown, a heat dissipation device for an unmanned helicopter (hereinafter referred to as the heat dissipation device) is disclosed. The device comprises a transfer mechanism 1, a transmission mechanism 2, and a fan 3. The transmission mechanism 2 is disposed between the transfer mechanism 1 and the fan 3. The transfer mechanism 1 is connected to the unmanned helicopter's engine, transferring a portion of the engine's power to the fan 3 via the transmission mechanism 2, thereby driving the fan 3 to rotate and cool the radiator. The heat dissipation device of this embodiment directly transfers a portion of the unmanned helicopter's engine's mechanical energy to the fan 3, eliminating the need for a series of energy conversions from mechanical energy to electrical energy, then electrical energy to chemical energy, and finally chemical energy to electrical energy required by the fan, thereby reducing energy loss.

[0035] Preferably, the transfer mechanism 1 includes a transfer case 11, a coupling 12 and a transfer shaft 13. The coupling 12 is arranged between the transfer case 11 and the transfer shaft 13. The transfer case 11 is connected to the engine and is used to output part of the engine's power to the coupling 12 and the transfer shaft 13. The transfer shaft 13 is used to connect the transmission mechanism 2 and transmit power to the transmission mechanism 2.

[0036] Preferably, the transmission mechanism 2 includes an input wheel 21, a transmission member 22 and an output unit 23. The input wheel 21 is connected to the transfer shaft 13. The transmission member 22 is arranged on the input wheel 21 and the output unit 23. The output unit 23 is connected to the fan 3. The transfer shaft 13 can drive the input wheel 21 and transmit the rotation to the output unit 23 through the transmission member 22, thereby driving the fan 3 to rotate.

[0037] Preferably, the transmission member 22 is a flexible transmission member, and the transmission member 22 is a transmission belt or a transmission chain.

[0038] The belt drive mechanisms used in unmanned helicopters require a tensioner on the flexible transmission element. The disadvantage of this approach is that the transmission mechanism consists of a driving wheel, a driven wheel, and a tensioner, requiring at least three wheels. The tensioner itself has a relatively large diameter, requiring bearings and a shaft inside. It must also be secured to the frame via a mechanism, and the position of the tensioner must be adjustable to tighten the belt. This further increases the space and weight of the belt drive mechanism, wasting space in the unmanned helicopter and reducing its payload.

[0039] Preferably, the output unit 23 is self-tensioning, and can both transmit power to the fan 3 and adjust the tension of the transmission member 22 .

[0040] Preferably, Figure 2 and Figure 3 As shown, the output unit 23 includes an output assembly, a tensioning assembly, and a locking assembly. The tensioning assembly is mounted on the output assembly. The transmission member 22 can be connected to the output assembly to transmit the rotation of the input wheel 21 to the output assembly. The tensioning assembly is used to adjust the spacing between the input wheel 21 and the output assembly, thereby adjusting the tension of the transmission member 22. Compared to the transmission mechanism of the prior art, which requires three wheels, the transmission member 22 of this embodiment only needs to connect the input wheel 21 and the output assembly, a total of two wheels. The tension of the transmission member 22 can be adjusted by the tensioning assembly mounted on the output assembly, eliminating the tensioning wheel. The heat dissipation device of this embodiment takes up less space in the unmanned helicopter, saving space on the unmanned helicopter body.

[0041] Preferably, the output assembly includes a first output wheel 231 and an output shaft 232. The first output wheel 231 is disposed at one end of the output shaft 232 and is coaxial with the output shaft 232. The transmission member 22 can be connected to the first output wheel 231 and transmit the rotation of the input wheel 21 to the first output wheel 231.

[0042] Preferably, the tensioning assembly includes a first tensioning sleeve 233, which is mounted on the output shaft 232 and rotatably connected to the locking assembly. The central axis of the input pulley 21, the central axis of the output shaft 232, and the central axis of the first tensioning sleeve 233 are parallel, but not coaxial. Circumferential rotation of the first tensioning sleeve 233 causes the output shaft 232 to rotate about the central axis of the first tensioning sleeve 233, thereby changing the wheelbase between the first output pulley 231 and the input pulley 21, thereby adjusting the tension of the transmission member 22.

[0043] Preferably, the tensioning assembly also includes a first bearing (not shown in the figure), which is arranged between the first tensioning sleeve 233 and the output shaft 232. The first bearing is used to reduce the friction between the first tensioning sleeve 233 and the output shaft 232, and prevent the output shaft 232 from axially disengaging from the first tensioning sleeve 233.

[0044] Preferably, the output unit 23 further includes a locking assembly, which includes a sleeve 235. The sleeve 235 comprises a first locking portion, a second locking portion, and a reducing portion. The reducing portion is a cylindrical reducing portion with a side opening, which is used to clamp the first tensioning sleeve 233. The first and second locking portions are respectively disposed on the side walls of the reducing portion on either side of the side opening. The first locking portion is used to connect to the body 100.

[0045] Preferably, to enable the reducing portion to clamp and secure the first tensioning sleeve 233, the locking assembly further includes a fastener 236. The fastener 236 is used to change the spacing between the first and second locking portions, thereby adjusting the degree of clamping between the reducing portion and the first tensioning sleeve 233. Loosening the fastener 236 allows the first tensioning sleeve 233 to rotate within the sleeve 235, thereby adjusting the wheelbase between the first output wheel 231 and the input rotating wheel 21. Tightening the fastener 236 allows the reducing portion to clamp the first tensioning sleeve 233, preventing it from rotating within the sleeve 235 and ensuring that the wheelbase between the first output wheel 231 and the input rotating wheel 21 remains unchanged.

[0046] Preferably, the fastener 236 is a bolt.

[0047] Preferably, Figure 2 As shown, in order to circumferentially rotate the first tensioning sleeve 233, the tensioning assembly further includes an adjustment frame 234, which is disposed at one end of the first tensioning sleeve 233. The adjustment frame 234 can be rotated with a wrench to circumferentially rotate the first tensioning sleeve 233. The adjustment frame 234 is a hexagonal frame.

[0048] Compared with the prior art, the heat dissipation device of this embodiment directly transfers part of the mechanical energy of the unmanned helicopter engine to the fan 3, without undergoing a series of energy conversions from mechanical energy to electrical energy, electrical energy to chemical energy, and chemical energy to electrical energy required by the fan, thereby reducing energy loss; the output unit 23 includes an output assembly and a tensioning assembly, the tensioning assembly is sleeved on the output assembly, the transmission member 22 can be set on the output assembly to transfer the rotation of the input runner 21 to the output assembly, and the tensioning assembly is used to adjust the distance between the input runner 21 and the output assembly, thereby adjusting the tension of the transmission member 22; the transmission member 22 of this embodiment only needs to be connected to the input runner 21 and the output assembly respectively The first output wheel 231 has two wheels in total, and the tensioning degree of the transmission member 22 can be adjusted by the tensioning assembly mounted on the output assembly, thereby eliminating the tensioning wheel of the prior art. The heat dissipation device of this embodiment occupies less space in the unmanned helicopter, saving the body space of the unmanned helicopter; the central axis of the input runner 21 and the central axis of the output shaft 232 are parallel to the central axis of the first tensioning sleeve 233, but are not coaxial; circumferentially rotating the first tensioning sleeve 233 can cause the output shaft 232 to rotate around the central axis of the first tensioning sleeve 233, thereby changing the wheelbase between the first output wheel 231 and the input runner 21, thereby achieving the purpose of adjusting the tensioning degree of the transmission member 22.

[0049] Example 2:

[0050] In Example 1, to change the wheelbase between the first output wheel 231 and the input rotating wheel 21, and thereby adjust the tension of the transmission member 22, it is necessary to circumferentially rotate the first tensioning sleeve 233, causing the first output wheel 231 to rotate about the central axis of the first tensioning sleeve 233. This means that the positions of the first output wheel 231 and the output shaft 232 are variable, which cannot meet the requirements of some unmanned helicopter models for a fixed position of the output shaft 232.

[0051] Another specific embodiment of the present invention is as follows Figure 4 As shown, in order to fix the output position of the output shaft 232, on the basis of Example 1, the output unit 23 is improved by eliminating the first output wheel 231, the first tensioning sleeve 233 and the adjustment frame 234; and the locking assembly is improved by eliminating the sleeve 235 and the fastener 236. Under the premise of adjusting the tensioning degree of the transmission member 22, the output position of the output shaft 232 can also be kept fixed.

[0052] Preferably, Figure 4As shown, the output assembly of this embodiment includes an output shaft 232, an output gear 237 disposed on the output shaft 232, a second tensioning sleeve 238, and a second output wheel 239. The locking assembly includes a seat tube 240, which is fixedly connected to the body 100. The output shaft 232 is rotatably connected to the inner wall of the seat tube 240. The second tensioning sleeve 238 is mounted on the seat tube 240 and is rotatable on the outer wall of the seat tube 240. The second output wheel 239 is mounted on the outer wall of the second tensioning sleeve 238 and is rotatable on the outer wall of the second tensioning sleeve 238. The second tensioning sleeve 238 and the seat tube 240 are not coaxial.

[0053] Preferably, a connecting hole is provided on the second tensioning sleeve 238 , and the connecting hole is used to connect with the seat tube 240 , and the seat tube 240 can pass through the connecting hole.

[0054] Preferably, the second output wheel 239 is connected to the transmission member 22. The end of the second output wheel 239 is provided with transmission teeth (not shown) that can mesh with the output gear 237. The rotation of the input wheel 21 is transmitted to the second output wheel 239 via the transmission member 22, and then to the output gear 237 via the transmission teeth, thereby driving the output shaft 232 to rotate, achieving the purpose of transmitting power from the input wheel 21 to the output shaft 232. In this embodiment, the central axes of the input wheel 21 and the output shaft 232 are parallel to, but not coaxial with, the central axis of the second tensioning sleeve 238. Circumferential rotation of the second tensioning sleeve 238 causes the second output wheel 239 to rotate about the central axes of the output shaft 232 and the seat 240, thereby changing the wheelbase between the second output wheel 239 and the input wheel 21. This allows the tension of the transmission member 22 to be adjusted without changing the position of the output shaft 232.

[0055] Preferably, the tensioning assembly of this embodiment further includes a second bearing (not shown in the figure), which is arranged between the second output wheel 239 and the second tensioning sleeve 238. The second bearing is used to reduce the friction between the second output wheel 239 and the second tensioning sleeve 238, and prevent the second output wheel 239 from separating from the second tensioning sleeve 238.

[0056] Preferably, in order to rotate the second tensioning sleeve 238 , the tensioning assembly of this embodiment further includes a gear portion 241 . The gear portions 241 are multiple and evenly distributed along the circumferential direction of the opening of the connecting hole of the second tensioning sleeve 238 .

[0057] Preferably, Figure 5 As shown, the output unit 23 of this embodiment further includes a self-locking component, which can be connected to the gear portion 241 to allow the second tensioning sleeve 238 to rotate circumferentially around the seat tube 240 and maintain the position of the second tensioning sleeve 238 unchanged.

[0058] Preferably, the self-locking assembly includes a worm 242 and a worm bracket 243. The worm bracket 243 is connected to the seat tube 240, and the worm 242 is rotatably connected to the worm bracket 243. The worm 242 can mesh with the gear portion 241 to form a worm gear pair. Rotating the worm 242 can drive the second tensioning sleeve 238 to rotate circumferentially around the seat tube 240.

[0059] Preferably, the worm gear pair is a self-locking worm gear pair. The helix angle (λ) of the worm 242 is less than the equivalent friction angle (ρ) between the tooth surface of the worm 242 and the gear portion 241. a When the worm 242 stops rotating, the worm gear pair can be self-locked, and the worm 242 can keep the position of the second tensioning sleeve 238 unchanged, making the tension adjustment convenient and quick.

[0060] Compared with Example 1, the rotation of the input wheel 21 of this embodiment can be transmitted to the second output wheel 239 through the transmission member 22, and transmitted to the output gear 237 through the transmission teeth, thereby driving the output shaft 232 to rotate, thereby achieving the purpose of transmission from the input wheel 21 to the output shaft 232; the central axis of the input wheel 21 and the central axis of the output shaft 232 of this embodiment are parallel to the central axis of the second tensioning sleeve 238, but are not coaxial; circumferential rotation of the second tensioning sleeve 238 can cause the second output wheel 239 to rotate around the central axis of the output shaft 232 and the seat cylinder 240, thereby changing the wheelbase of the second output wheel 239 and the input wheel 21, thereby achieving the purpose of adjusting the tensioning degree of the transmission member 22 without changing the position of the output shaft 232.

[0061] The worm 242 of this embodiment can mesh with the gear portion 241 to form a worm gear pair. When the worm 242 stops rotating, the worm gear pair can self-lock, and the worm 242 can keep the position of the second tensioning sleeve 238 unchanged, making tension adjustment convenient and quick.

[0062] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A heat dissipation device for an unmanned helicopter, characterized in that: The invention comprises a transfer mechanism (1), a transmission mechanism (2) and a fan (3), wherein the transmission mechanism (2) is arranged between the transfer mechanism (1) and the fan (3), and the transfer mechanism (1) is used to be connected to the engine of an unmanned helicopter, transmit part of the power of the engine to the fan (3) through the transmission mechanism (2), and drive the fan (3) to rotate to cool the radiator; the heat dissipation device of the unmanned helicopter directly transmits part of the mechanical energy of the engine of the unmanned helicopter to the fan (3).

2. The heat dissipation device for an unmanned helicopter according to claim 1, characterized in that: The transfer mechanism (1) comprises a transfer case (11), a coupling (12) and a transfer shaft (13); the coupling (12) is arranged between the transfer case (11) and the transfer shaft (13); the transfer case (11) is connected to the engine and is used to output part of the engine's power to the coupling (12) and the transfer shaft (13); the transfer shaft (13) is used to connect to the transmission mechanism (2) and transmit power to the transmission mechanism (2).

3. The heat dissipation device for an unmanned helicopter according to claim 2, characterized in that: The transmission mechanism (2) comprises an input wheel (21), a transmission member (22) and an output unit (23); the input wheel (21) is connected to the transfer shaft (13); the transmission member (22) is arranged on the input wheel (21) and the output unit (23); the output unit (23) is connected to the fan (3); the transfer shaft (13) can drive the input wheel (21) and transmit the rotation to the output unit (23) through the transmission member (22), thereby driving the fan (3) to rotate.

4. The heat dissipation device for an unmanned helicopter according to claim 3, characterized in that: The transmission member (22) is a flexible transmission member.

5. The heat dissipation device for an unmanned helicopter according to claim 3, characterized in that: The transmission member (22) is a transmission belt or a transmission chain.

6. The heat dissipation device for an unmanned helicopter according to claim 3, characterized in that: The output unit (23) includes an output assembly, a tensioning assembly and a locking assembly. The tensioning assembly is sleeved on the output assembly. The transmission member (22) can be connected to the output assembly to transmit the rotation of the input wheel (21) to the output assembly. The tensioning assembly is used to adjust the distance between the input wheel (21) and the output assembly, thereby adjusting the tension of the transmission member (22).

7. The heat dissipation device for an unmanned helicopter according to claim 6, characterized in that: The output assembly comprises a first output wheel (231) and an output shaft (232), wherein the first output wheel (231) is arranged at one end of the output shaft (232); the transmission member (22) is connectable to the first output wheel (231) and transmits the rotation of the input rotating wheel (21) to the first output wheel (231).

8. The heat dissipation device for an unmanned helicopter according to claim 7, characterized in that: The tensioning assembly comprises a first tensioning sleeve (233), the first tensioning sleeve (233) is sleeved on the output shaft (232), and the first tensioning sleeve (233) can be rotatably connected to the locking assembly.

9. The heat dissipation device for an unmanned helicopter according to claim 7, characterized in that: The first output wheel (231) is coaxial with the output shaft (232).

10. The heat dissipation device for an unmanned helicopter according to claim 6, characterized in that: The output unit (23) further includes a locking assembly.

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