A power unit suitable for unmanned aerial vehicles

Abstract

This utility model discloses a power unit suitable for unmanned aerial vehicles (UAVs), including a base, a motor assembly, and a cooling fan. The base is provided with a pipe clamp structure and an air inlet. The motor assembly is disposed on the base and includes a stator and a rotor. The stator is fixedly disposed on the base, and the rotor is rotatably disposed on the stator. An airflow gap is formed between the stator and the rotor, extending along the rotation axis of the rotor. The airflow gap has an air inlet side and an air outlet side, with the air inlet side communicating with the air inlet. A propeller mounting part is provided at one end of the rotor. The cooling fan is mounted on the rotor and located on the air outlet side of the airflow gap, enabling airflow from the air inlet side to the air outlet side within the airflow gap.

Description

Technical Field

[0001] This utility model relates to unmanned aerial vehicle (UAV) components, and more particularly to a power unit suitable for UAVs. Background Technology

[0002] Some existing drones consist of a fuselage, a power unit, and propellers. The power unit comprises a base and a motor assembly, with the motor assembly mounted on the base, which has a clamp structure. The drone's fuselage has a mounting rod, and the modular power unit can be installed onto this rod via the clamp structure. This installation is relatively secure and facilitates replacement and maintenance. The propellers are mounted on the rotor of the motor assembly. However, with this type of power unit, the motor assembly generates relatively significant heat during flight, which can easily lead to overheating during prolonged operation, affecting the lifespan of the power unit. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a power unit suitable for unmanned aerial vehicles (UAVs) that can reduce the risk of overheating and extend service life.

[0004] A power unit for unmanned aerial vehicles (UAVs) according to an embodiment of the present invention includes a base, a motor assembly, and a cooling fan. The base has a pipe clamp structure and an air inlet. The motor assembly is disposed on the base and includes a stator and a rotor. The stator is fixedly disposed on the base, and the rotor is rotatably disposed on the stator. An airflow gap is formed between the stator and the rotor, extending along the rotation axis of the rotor. The airflow gap has an air inlet side and an air outlet side, with the air inlet side communicating with the air inlet. One end of the rotor is provided with a propeller mounting portion. The cooling fan is disposed on the rotor and located on the air outlet side of the airflow gap, enabling airflow from the air inlet side to the air outlet side within the airflow gap.

[0005] The power unit applicable to unmanned aerial vehicles (UAVs) according to the present invention has at least the following beneficial effects: When the power unit is assembled and used, the base can be installed on the mounting rod of the UAV through a pipe clamp structure, and a propeller is installed at the propeller mounting part of the rotor body. The motor assembly forms an airflow gap between the stator and the rotor body, and a cooling fan is provided on the rotor body. When the motor assembly is working, the rotor body rotates relative to the stator body, driving the cooling fan to rotate. Outside air can flow into the air inlet side of the airflow gap from the air inlet hole, so that an airflow from the air inlet side to the air outlet side is formed in the airflow gap. The airflow can carry away the heat inside the motor assembly, thereby reducing the risk of overheating of the power unit and extending the service life of the power unit.

[0006] According to some embodiments of the present invention, the rotor body includes an annular shell, a rotating shaft, and a connecting frame. The annular shell is provided with a clearance hole, the stator body passes through the clearance hole, the stator body is connected to the base, the stator body is provided with a shaft hole, the rotating shaft is rotatably disposed in the shaft hole, the connecting frame is located at one end of the annular shell, the connecting frame is connected to the annular shell and the rotating shaft respectively, the connecting frame, the annular shell, and the rotating shaft rotate synchronously, and the cooling fan is connected to the connecting frame.

[0007] According to some embodiments of the present invention, the motor assembly further includes a bearing, which is mounted in the shaft hole, and the rotating shaft is rotatably connected to the shaft hole through the bearing.

[0008] According to some embodiments of the present invention, the base includes a base frame and an air guide shroud. The air guide shroud is arranged around the base frame. The base frame is connected to the air guide shroud and forms a receiving groove. The periphery of the opening of the receiving groove is opposite to the annular shell. The pipe clamp structure is arranged on the base frame. The air inlet is arranged on the air guide shroud. The stator body is mounted on the base frame.

[0009] According to some embodiments of the present invention, the heat dissipation fan is a centrifugal fan, which is detachably connected to one end of the rotor body near the propeller mounting part. The centrifugal fan includes a plate and multiple fan blades. The plate is arranged perpendicular to the rotation axis of the rotor body, and the fan blades are connected to the side of the plate near the airflow gap. All the fan blades are evenly arranged around the rotation axis of the centrifugal fan.

[0010] According to some embodiments of the present invention, a control module is also included. The base is provided with a receiving groove, the control module is disposed on the base and located in the receiving groove, the control module is electrically connected to the motor assembly, the air inlet is located on the bottom wall of the receiving groove, and the opening of the receiving groove is opposite to and connected to the air inlet side of the airflow gap.

[0011] According to some embodiments of the present invention, an indicator light is also included, which is disposed on the base and electrically connected to the control module.

[0012] According to some embodiments of the present invention, the pipe clamp structure has a clamping hole, the indicator light is inserted into one end of the clamping hole, and the portion of the indicator light located in the clamping hole forms a mounting rod limiting part.

[0013] According to some embodiments of the present invention, the base includes a base frame and an air guide shroud. The air guide shroud is arranged around the base frame. The base frame is connected to the air guide shroud and forms the receiving groove. The pipe clamp structure is arranged on the base frame. The air inlet is arranged on the air guide shroud. The control module is installed on the base frame.

[0014] According to some embodiments of the present invention, the pipe clamp structure includes a threaded fastener and two elastic arms, the two elastic arms forming a clamping hole, and the threaded fastener is disposed at the ends of the two elastic arms and can adjust the distance between the ends of the two elastic arms.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a perspective view of a power unit applicable to an unmanned aerial vehicle according to an embodiment of the present invention;

[0018] Figure 2 This is a perspective view of a power unit applicable to an unmanned aerial vehicle according to an embodiment of the present invention;

[0019] Figure 3 This is an embodiment of the present utility model. Figure 1 Schematic cross-sectional view along the AA direction;

[0020] Figure 4 This is an exploded schematic diagram of a power unit for an unmanned aerial vehicle (UAV) according to an embodiment of the present invention.

[0021] Figure label:

[0022] Base 100, base frame 110, clamping hole 111, threaded fastener 112, elastic arm 113, air guide shroud 120, air inlet 121, receiving groove 130;

[0023] Motor assembly 200, stator body 210, shaft hole 211, rotor body 220, annular shell 221, rotating shaft 222, connecting frame 223, airflow gap 230, propeller mounting part 240, bearing 250;

[0024] Cooling fan wheel 300, plate 310, fan blade 320;

[0025] Control module 400;

[0026] Indicator light 500;

[0027] Sprayer head mounting plate 600. Detailed Implementation

[0028] 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.

[0029] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Reference Figures 1 to 4 The present invention provides a power unit for unmanned aerial vehicles, including a base 100, a motor assembly 200, and a heat dissipation fan 300. The base 100 is provided with a pipe clamp structure and an air inlet 121. The motor assembly 200 is disposed on the base 100 and includes a stator body 210 and a rotor body 220. The stator body 210 is fixedly disposed on the base 100, and the rotor body 220 is rotatably disposed on the stator body 210. An airflow gap 230 is formed between the stator body 210 and the rotor body 220. The airflow gap 230 extends along the rotation axis of the rotor body 220 and has an air inlet side and an air outlet side. The air inlet side is connected to the air inlet 121. A propeller mounting part 240 is provided at one end of the rotor body 220. A cooling fan 300 is disposed on the rotor body 220 and located on the air outlet side of the airflow gap 230. The cooling fan 300 enables airflow from the air inlet side to the air outlet side to be formed in the airflow gap 230.

[0033] When the power unit is assembled and used, the base 100 can be installed on the mounting rod of the UAV through the pipe clamp structure, and the propeller is installed at the propeller mounting part 240 of the rotor body 220. The motor assembly 200 forms an airflow gap 230 between the stator body 210 and the rotor body 220, and a cooling fan 300 is provided on the rotor body 220. When the motor assembly 200 is working, the rotor body 220 rotates relative to the stator body 210, driving the cooling fan 300 to rotate. Outside air can flow into the air inlet side of the airflow gap 230 from the air inlet side to the air outlet side in the airflow gap 230. The airflow can carry away the heat inside the motor assembly 200, thereby reducing the risk of overheating of the power unit and extending the service life of the power unit.

[0034] In the embodiments, reference is made to Figure 3 The rotor body 220 includes an annular shell 221, a rotating shaft 222, and a connecting frame 223. The annular shell 221 has a clearance hole through which the stator body 210 passes and is connected to the base 100. The stator body 210 has a shaft hole 211 through which the rotating shaft 222 is rotatably disposed. The connecting frame 223 is located at one end of the annular shell 221 and is connected to both the annular shell 221 and the rotating shaft 222. The connecting frame 223, the annular shell 221, and the rotating shaft 222 rotate synchronously. The cooling fan 300 is connected to the connecting frame 223. In the rotor body 220 described above, the annular shell 221 is located outside the stator body 210. When the rotor body 220 rotates, it can improve the heat dissipation efficiency. Furthermore, the annular shell 221 is connected to the rotating shaft 222 through the connecting frame 223, allowing the annular shell 221 to rotate smoothly, which in turn drives the cooling fan 300 to rotate smoothly, achieving efficient heat dissipation.

[0035] Specifically, the inner wall of the annular shell 221 has magnets, and the stator body 210 has an iron core and coils, so that the rotor body 220 can rotate under electric drive.

[0036] In the embodiments, reference is made to Figure 3 The motor assembly 200 also includes a bearing 250, which is mounted in a shaft hole 211. A rotating shaft 222 is rotatably connected to the shaft hole 211 via the bearing 250. The rotating shaft 222 is rotatably connected to the shaft hole 211 of the stator body 210 via the bearing 250, which can reduce the rotational friction between the rotor body 220 and the stator body 210 and reduce the heat generation of the motor assembly 200.

[0037] In the embodiments, reference is made to Figure 4The base 100 includes a base frame 110 and an air guide shroud 120. The air guide shroud 120 surrounds the base frame 110. The base frame 110 is connected to the air guide shroud 120 and forms a receiving groove 130. The periphery of the groove opening of the receiving groove 130 is opposite to the annular shell 221. A pipe clamp structure is provided on the base frame 110, and an air inlet 121 is provided on the air guide shroud 120. The stator body 210 is mounted on the base frame 110. The base 100 is assembled and manufactured by the base frame 110 and the air guide shroud 120, which facilitates the reduction of the processing and manufacturing difficulty of the parts.

[0038] It is conceivable that in other embodiments, the base 100 may also be a one-piece molded part, reducing the number of parts and simplifying the assembly process.

[0039] In the embodiments, reference is made to Figure 1 The cooling fan 300 is a centrifugal fan, detachably connected to one end of the rotor 220 near the propeller mounting portion 240. The centrifugal fan includes a plate 310 and multiple fan blades 320. The plate 310 is positioned perpendicular to the rotation axis of the rotor 220, and the fan blades 320 are connected to the side of the plate 310 near the airflow gap 230. All fan blades 320 are evenly arranged around the rotation axis of the centrifugal fan. Because the airflow direction of the centrifugal fan is perpendicular to the rotation axis of the rotor 220, and when the propeller is mounted on the rotor 220, the airflow direction of the propeller is approximately parallel to the rotation axis of the rotor 220, the plate 310 of the centrifugal fan can prevent the propeller's airflow from interfering with the airflow of the centrifugal fan. Furthermore, the airflow direction of the centrifugal fan itself does not interfere with the propeller's airflow direction, resulting in good heat dissipation capacity of the cooling fan 300. The cooling fan 300 is detachable, allowing for easy replacement and maintenance when damaged.

[0040] Specifically, the centrifugal impeller is detachably connected to the rotor body 220 by means of screw fastening. It is conceivable that the centrifugal impeller could also be detachably connected to the rotor body 220 by means of, for example, snap-fit ​​connections.

[0041] It is conceivable that in some other embodiments, the cooling fan 300 may also be an axial flow fan, in which case the cooling fan 300 may also be installed at the end of the rotor body 220 away from the propeller mounting part 240.

[0042] In the embodiments, reference is made to Figure 3The system also includes a control module 400. A receiving groove 130 is provided in the base 100. The control module 400 is disposed in the base 100 and located within the receiving groove 130. The control module 400 is electrically connected to the motor assembly 200. An air inlet 121 is located on the bottom wall of the receiving groove 130. The opening of the receiving groove 130 is opposite to and connected to the air inlet side of the airflow gap 230. The control module 400 is installed in the receiving groove 130 of the base 100, which provides good protection for the control module 400. Since the air inlet 121 is located on the bottom wall of the receiving groove 130, when the motor assembly 200 is working, outside air first enters the receiving groove 130 through the air inlet 121. Then, the air in the receiving groove 130 passes through the airflow gap 230 and is blown out by the cooling fan 300, allowing the cooling fan 300 to simultaneously dissipate heat from the control module 400. The power unit has a relatively compact structure and good heat dissipation effect.

[0043] Specifically, the control module 400 is a control circuit board. It is conceivable that in other embodiments, the control module 400 may also be, for example, a microcontroller, etc., which is not limited here.

[0044] In the embodiments, reference is made to Figure 1 It also includes an indicator light 500, which is mounted on the base 100 and electrically connected to the control module 400. The indicator light 500, in conjunction with the control module 400, directly displays the operating status of the power unit, allowing users to observe and adjust it promptly, thus improving ease of use.

[0045] In this embodiment, the pipe clamp structure has a clamping hole 111. The indicator light 500 is inserted into one end of the clamping hole 111, and the portion of the indicator light 500 located within the clamping hole 111 forms a mounting rod limiting part. The indicator light 500 is installed using the clamping hole 111 of the pipe clamp, simplifying the installation method and making the installation relatively convenient and reliable. Furthermore, by using the portion of the indicator light 500 inserted into the clamping hole 111 to form the mounting rod limiting part, when the power unit is installed onto the mounting rod of the UAV, the mounting rod is directly inserted into the clamping hole 111, and the portion of the indicator light 500 inserted into the clamping hole 111 abuts against and limits the mounting rod, allowing for easy assembly of both components.

[0046] Specifically, the indicator light 500 is inserted into the clamping hole 111, and the indicator light 500 is secured to the clamping structure by screws.

[0047] In the embodiments, reference is made to Figure 3The base 100 includes a base frame 110 and an air guide shroud 120. The air guide shroud 120 surrounds the base frame 110. The base frame 110 is connected to the air guide shroud 120 and forms a receiving groove 130. A pipe clamp structure is provided on the base frame 110, an air inlet 121 is provided on the air guide shroud 120, and a control module 400 is mounted on the base frame 110. The base 100 described above has relatively convenient parts processing and manufacturing, a compact structure, and relatively reliable installation.

[0048] Specifically, the base frame 110 and the air guide shroud 120 are fixed by screws, and the stator body 210 is fixed to the base frame 110 by screws.

[0049] In the embodiments, reference is made to Figure 1 The pipe clamp structure includes a threaded fastener 112 and two elastic arms 113. The two elastic arms 113 form a clamping hole 111. The threaded fastener 112 is located at the ends of the two elastic arms 113 and can adjust the distance between the ends of the two elastic arms 113. When the base 100 is installed onto the mounting rod of the UAV via the pipe clamp structure, the two elastic arms 113 clamp the mounting rod, which is located within the clamping hole 111. At this time, the distance between the ends of the two elastic arms 113 can be further reduced by the threaded fastener 112, thereby firmly clamping the mounting rod and reducing the risk of the pipe clamp structure loosening.

[0050] It is conceivable that in other embodiments, the pipe clamp structure may also be implemented in other ways. For example, the pipe clamp structure includes a bolt and nut pair and two clamping arms. One end of each clamping arm is pivotally connected to the base 100. The two clamping arms form a clamping hole 111. The bolt and nut pair passes through the other end of the two clamping arms. The clamping arms clamp the mounting rod of the UAV by the force of tightening the bolt and nut.

[0051] Specifically, the base 100 is provided with multiple air inlets 121, which are elongated and narrow, making it difficult for foreign objects to enter the receiving groove 130 through the air inlets 121.

[0052] Specifically, it also includes a nozzle mounting plate 600, which is mounted at the ends of the two elastic arms 113. The nozzle mounting plate 600 can be used to mount nozzles.

[0053] Specifically, the propeller mounting part 240 can be a threaded hole.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A power plant suitable for use in a drone, characterized in that, include: The base (100) is provided with a pipe clamp structure and an air inlet (121); A motor assembly (200) is disposed on the base (100). The motor assembly (200) includes a stator body (210) and a rotor body (220). The stator body (210) is fixedly disposed on the base (100), and the rotor body (220) is rotatably disposed on the stator body (210). An airflow gap (230) is formed between the stator body (210) and the rotor body (220). The airflow gap (230) extends along the rotation axis of the rotor body (220). The airflow gap (230) has an air inlet side and an air outlet side. The air inlet side is connected to the air inlet hole (121). A propeller mounting part (240) is provided at one end of the rotor body (220). A cooling fan (300) is disposed on the rotor body (220) and located on the air outlet side of the airflow gap (230). The cooling fan (300) enables airflow to be formed in the airflow gap (230) from the air inlet side to the air outlet side.

2. The power plant suitable for use in a drone according to claim 1, characterized in that: The rotor body (220) includes an annular shell (221), a rotating shaft (222), and a connecting frame (223). The annular shell (221) is provided with a clearance hole, and the stator body (210) passes through the clearance hole. The stator body (210) is connected to the base (100). The stator body (210) is provided with a shaft hole (211), and the rotating shaft (222) is rotatably disposed in the shaft hole (211). The connecting frame (223) is located at one end of the annular shell (221), and the connecting frame (223) is connected to the annular shell (221) and the rotating shaft (222) respectively. The connecting frame (223), the annular shell (221), and the rotating shaft (222) rotate synchronously. The cooling fan (300) is connected to the connecting frame (223).

3. The power plant suitable for use in a drone according to claim 2, characterized in that: The motor assembly (200) also includes a bearing (250) mounted in the shaft hole (211), and the rotating shaft (222) is rotatably connected to the shaft hole (211) via the bearing (250).

4. The power plant suitable for use in a drone according to claim 2, characterized in that: The base (100) includes a base frame (110) and an air guide shroud (120). The air guide shroud (120) is arranged around the base frame (110). The base frame (110) is connected to the air guide shroud (120) and forms a receiving groove (130). The periphery of the groove opening of the receiving groove (130) is opposite to the annular shell (221). The pipe clamp structure is arranged on the base frame (110). The air inlet (121) is arranged on the air guide shroud (120). The stator body (210) is mounted on the base frame (110).

5. The power plant suitable for use in a drone according to claim 1, characterized in that: The cooling fan (300) is a centrifugal fan. The centrifugal fan is detachably connected to one end of the rotor body (220) near the propeller mounting part (240). The centrifugal fan includes a plate (310) and a plurality of fan blades (320). The plate (310) is arranged perpendicular to the rotation axis of the rotor body (220). The fan blades (320) are connected to the side of the plate (310) near the airflow gap (230). All the fan blades (320) are evenly arranged around the rotation axis of the centrifugal fan.

6. The power plant suitable for use in a drone according to claim 1, characterized in that: It also includes a control module (400), the base (100) is provided with a receiving groove (130), the control module (400) is disposed on the base (100) and located in the receiving groove (130), the control module (400) is electrically connected to the motor assembly (200), the air inlet (121) is located on the bottom wall of the receiving groove (130), and the opening of the receiving groove (130) is opposite to and connected to the air inlet side of the airflow gap (230).

7. The power plant suitable for use in a drone according to claim 6, characterized in that: It also includes an indicator light (500), which is disposed on the base (100) and is electrically connected to the control module (400).

8. The power plant suitable for use in a drone according to claim 7, characterized in that: The pipe clamp structure has a clamping hole (111), and the indicator light (500) is inserted into one end of the clamping hole (111). The part of the indicator light (500) located in the clamping hole (111) forms a mounting rod limiting part.

9. The power plant suitable for use in a drone according to claim 6, characterized in that: The base (100) includes a base frame (110) and an air guide shroud (120). The air guide shroud (120) is arranged around the base frame (110). The base frame (110) is connected to the air guide shroud (120) and forms the receiving groove (130). The pipe clamp structure is arranged on the base frame (110). The air inlet (121) is arranged on the air guide shroud (120). The control module (400) is installed on the base frame (110).

10. The power plant suitable for use in a drone according to claim 1, characterized in that: The pipe clamp structure includes a threaded fastener (112) and two elastic arms (113). The two elastic arms (113) form a clamping hole (111). The threaded fastener (112) is located at the ends of the two elastic arms (113) and can adjust the distance between the ends of the two elastic arms (113).

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