WO2018120001A1

WO2018120001A1 - Power device, power kit, and unmanned aerial vehicle

Info

Publication number: WO2018120001A1
Application number: PCT/CN2016/113431
Authority: WO
Inventors: 胡孟; 崔留争; 陈日松; 李忠洪
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2018-07-05
Also published as: CN107074354B; CN107074354A

Abstract

A power device, comprising a motor (1) and a propeller (2); the motor (1) is used for driving the propeller (2) to rotate; the motor (1) has a hollow cavity (11) that is open at two ends; the hollow cavity (11) extends from the top of the motor (1) to the bottom along an axis direction of the motor (1); the propeller (2) comprises a hub (21) and a blade (22) connected to the hub (21); the hub (21) is provided with a through hole (211); the hub (21) is fixedly connected to the motor (1), and the through hole (211) corresponds to the hollow cavity (11) of the motor (1) to form a cable passing hole through which a cable (41) electrically connected to an antenna (42) passes. The power device can ensure high signal quality and strength of the antenna. Also disclosed are a power kit and an unmanned aerial vehicle.

Description

Powerplant, power pack and unmanned aerial vehicle

Technical field

The invention relates to the field of unmanned aerial vehicles, in particular to a power device, a power package and an unmanned aerial vehicle.

Background technique

During the flight, the UAV needs to receive external control signals through the antenna, transmit the video images captured by the UAV to the ground, and receive satellite navigation signals.

At present, in order to complete various types of signal transmission and reception work, the antenna of the unmanned aerial vehicle includes a navigation antenna and an image transmission antenna. Wherein, the image transmission antenna can be used to receive the control signal and return the flight attitude information and the captured image. In order to avoid the navigation antenna and the radiation interference source such as the unmanned aerial vehicle's electronic adjustment, the image transmission antenna is usually disposed on the tripod of the unmanned aerial vehicle, because the tripod is far away from the body of the unmanned aerial vehicle, and is located at Outside the body, the image transmission antenna is less interfered by interference sources and obstacles, and has higher signal transmission quality.

However, with the increasing miniaturization of unmanned aerial vehicles, the size of the tripod has been greatly reduced, even for the design of a tripodless. At this time, the image transmission antenna lacks a suitable mounting position, and can only be disposed on the body, and the electronic component is disposed in the body, which greatly affects the signal quality of the antenna.

Summary of the invention

The invention provides a power device, a power package and an unmanned aerial vehicle, which can ensure the antenna has relatively good signal quality and strength.

In a first aspect, the present invention provides a power unit including a motor and a propeller, wherein the motor is used to drive the propeller to rotate, the motor has a hollow cavity at both ends, and the hollow body extends from the top to the bottom of the motor along the axial direction of the motor; The propeller includes a hub and a blade connected to the hub, the hub is provided with a through hole; wherein the hub is fixedly connected to the motor, and the through hole of the hub corresponds to the hollow cavity of the motor, and is formed to be electrically connected to the antenna A threaded hole through which the connected cable passes.

In a second aspect, the present invention provides a power kit including the power unit and the day as described above The line device includes an antenna and a receiver. The antenna is located at the top end of the propeller hub of the power unit. The cable of the antenna passes through the hollow body in the power unit and is electrically connected to the receiver.

In a third aspect, the present invention provides an unmanned aerial vehicle comprising a frame and a power kit as described above, wherein the frame is provided with a motor mount, the motor in the power pack is disposed on the motor mount, and the power pack is Both the antenna assembly and the propeller are located on the side of the motor remote from the motor mount.

The power device, the power package and the unmanned aerial vehicle of the present invention, wherein the power device comprises a motor and a propeller, and the motor is used for driving the propeller to rotate. The motor has a hollow cavity with two ends open, and the hollow cavity body is from the top of the motor along the axis direction of the motor. Extending to the bottom; the propeller includes a hub and a blade connected to the hub, the hub is provided with a through hole; and the hub is fixedly connected to the motor, and the through hole of the hub corresponds to the hollow cavity of the motor, and is formed for A threading hole through which a cable electrically connected to the antenna passes. In the power device, the top position of the propeller and the motor can be provided with an antenna, and the cable of the antenna can pass through the power device, so that the antenna for transmitting and receiving signals can be disposed on the power device; the position of the antenna is relatively empty. , signal quality and signal strength are better.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural view of a power device according to Embodiment 1 of the present invention;

2 is a schematic exploded view of a power unit according to Embodiment 1 of the present invention;

3 is a schematic structural view of another power device according to Embodiment 1 of the present invention;

4 is a schematic structural view of still another motor according to Embodiment 1 of the present invention;

5 is a schematic cross-sectional view of a power package according to Embodiment 2 of the present invention;

6 is a schematic structural view of a power package according to Embodiment 2 of the present invention;

7 is a schematic cross-sectional view showing another power package according to Embodiment 2 of the present invention;

8 is a schematic structural view of another power package according to Embodiment 2 of the present invention;

9 is a schematic structural view of an unmanned aerial vehicle according to Embodiment 3 of the present invention;

FIG. 10 is a schematic diagram of an antenna coverage range of an unmanned aerial vehicle according to Embodiment 3 of the present invention.

Description of the reference signs:

1-motor

2—propeller;

3—the bushing;

4—antenna device;

5—Motor mount;

11—the hollow body;

12—motor shaft;

13—rotor shell;

14-stator;

21—paddle hub;

22—blade;

31—Limited part;

32, 121 - bearing;

41—cable;

42—antenna;

43-receiver;

44—locking member;

100—power unit;

200, 300, 400 - power kit;

211—through hole;

401—rack;

500 - unmanned aerial vehicle.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 is a schematic structural view of a power unit according to Embodiment 1 of the present invention. Figure 2 is the invention A schematic diagram of the explosion of the power unit provided in the first embodiment. As shown in FIGS. 1 and 2, the power unit in this embodiment includes a motor 1 and a propeller 2 for driving the propeller 2 to rotate. The motor 1 has a hollow cavity 11 which is open at both ends, and the hollow cavity 11 extends from the top to the bottom of the motor 1 in the axial direction of the motor 1. The propeller 2 includes a hub 21 and a blade 22 coupled to the hub 21. The hub 21 is provided with a through hole 211. The hub 21 is fixedly coupled to the motor 1. The through hole 211 of the hub 21 corresponds to the hollow cavity 11 of the motor 1, forming a threading hole through which the cable 41 electrically connected to the antenna passes.

Specifically, the motor 1 in the power unit can be generally disposed on the motor mount or the motor base of the UAV, and is fixedly connected to the motor mount or the motor base through fasteners or clips. The motor 1 has a rotor and a stator inside. The rotor can rotate around the motor shaft 12 in the center of the motor 1 under the action of an electromagnetic field generated by the stator, and drives the propeller 2 to rotate, thereby driving the unmanned aircraft to start or stop or air attitude. Adjustment. The motor 1 is internally provided with a hollow cavity 11, the longitudinal direction of which is the same as the axial direction of the motor 1, and the two ends of the hollow body 11 extend to the top and bottom of the motor 1, respectively. The propeller 2 generally includes a hub 21 and a plurality of blades 22, one end of which is coupled to the hub 21 and the other end of which extends outwardly of the hub 22. When the hub 21 is rotated, the blades 22 can drive the air to flow as a power for the UAV to fly. A through hole 211 is provided in the center of the hub 21, and the through hole 211 corresponds to the hollow cavity 11 to form a threading hole penetrating the motor 1 and the propeller 2, and the threading hole is allowed to pass through the cable 41 connected to the antenna.

Since the power supply device is provided with a threading hole, the antenna can be disposed on one side of the motor 1 and the propeller 2, and the cable 41 connected to the antenna can pass through the threading hole and be connected to the transceiver on the other side of the motor 1 and the like. Keep an electrical connection. At this time, since the axial direction of the motor 1 generally follows a vertical or approximately vertical direction in the unmanned aerial vehicle, and the propeller 2 is disposed at the top of the motor 1, the antenna can be disposed at the top of the propeller 2 and the motor 1. Position, so that the position of the antenna is relatively empty, and there are fewer obstructions around, so that the antenna can have better signal strength. The hollow cavity 11 and the through hole 211 serve as a passage through the cable 41, so that the cable 41 can avoid the rotating part of the motor 1 or the rotating propeller 2 when passing through the power unit, and realize the antenna safely and reliably. The electrical connection of other components ensures that the antenna can transmit and communicate electrical signals between the cable 41 and other devices.

Optionally, the cable 41 connected to the antenna may include at least one of the following: used for the day A line-powered power line, or a feeder for transmitting signals. In addition, the cable 41 may also include cables of other functions, such as control signal lines and the like.

Generally, since the cable 41 for connection with the antenna is generally a relatively soft wire, in order to protect it, the power unit further includes a sleeve 3 which is bored in the hollow body 11 of the motor 1, the shaft The inner diameter of the sleeve 3 is larger than the outer diameter of the cable 41. Thus, the cable 41 can be sleeved in the sleeve 3. On the one hand, the sleeve 3 serves to increase the insulation, electromagnetic shielding and the like. On the other hand, since the hollow body 11 inside the motor 1 may be located in the rotating member and rotates with it, the cable 41 is avoided. Due to the twisting, winding or even breaking of the hollow body 11, the sleeve 3 can be relatively fixed with the portion of the motor 1 that does not rotate, thereby making the cable 41 in a relatively static stable environment.

In order to maintain a relatively fixed position or structure of the motor 1 that does not rotate, the bottom end of the sleeve 3 is provided with a limiting portion 31 for connecting and fixing to the motor mount 5 or the motor base. Since the motor mount 5 or the motor base is stationary with respect to the stator and the like of the motor 1, the sleeve 3 can also remain relatively stationary without rotating with the rotor or the like of the motor 1, thereby effectively avoiding the inside of the sleeve 3. The cable 41 is twisted and the like.

Further, in general, the sleeve 3 can be fixed by screwing or the like. For example, the stopper portion 31 is a screw fastening portion, and the motor mount 5 or the motor base is provided with a screw hole that is screwed to the screw fastening portion. Since the limiting portion 31 is fixed in the screw hole, the relative fixing between the sleeve 3 and the motor mount 5 or the motor base can be maintained. In addition, the sleeve 3 can also be fixed to the motor mount 5 or the motor base by means of snapping or the like, and the sleeve 3 can be prevented from rotating by using a structure such as a limiting protrusion.

In order to facilitate the mounting and connection with other components such as an antenna, one of the open ends of the sleeve 3 protrudes beyond the hub 21, and the other open end protrudes from the opening of the hollow body 11 near the bottom of the motor 1. Thus, the two open ends of the sleeve 3 extend out of the power unit, facilitate connection with the antenna or the motor mount 5, and the like, and facilitate the passage of the cable 41.

Generally, the motor 1 in the power unit has a plurality of different structures, such as an inner rotor motor that may be a rotor, an outer stator, or an outer rotor motor with a rotor outside the stator. Due to the different structure of the motor, the interior has different rotating parts and fixed parts, and accordingly, the position and form of the hollow body 11 are also different, so as to ensure that both ends can be extended to the ends of the motor 1 for the cable 41 to be worn. Assume.

As an alternative embodiment, the motor 1 in the power unit may be an outer rotor motor, the stator of the motor 1 is located inside the motor and surrounds the hollow body 11 , and the outer part of the motor 1 is a rotatable rotor shell The hub 21 can be rotated together with the rotor case of the motor 1 to drive the UAV to fly and start and stop.

Generally, the motor 1 generally includes a motor shaft 12, which may be either a fixed shaft fixed to the stator or a rotating shaft rotatable with the rotor housing. As shown in FIG. 1, when the motor shaft 12 is a shaft that can rotate with the rotor casing 13, the hub 21 of the propeller 2 can be directly sleeved outside the top end of the motor shaft 12 and fixedly coupled to the motor shaft 12, that is, Rotating with the rotation of the motor shaft 12; and the hollow cavity 11 inside the motor 1 is disposed inside the motor shaft 12, at this time, the sleeve 3 passes through the motor shaft 12 and is rotatable relative to the motor shaft 12, so that When the motor shaft 12 is rotated, the sleeve 3 is fixed to the non-rotatable portion of the motor 1, or other structure for connecting the motor 1, so that the sleeve 3 itself remains stationary and does not rotate with the motor shaft 12.

In order to realize the rotatable connection between the sleeve 3 and the motor shaft 12, a bearing 32 is generally disposed between the sleeve 3 and the inner wall of the hollow body 11, and the two are connected by a bearing 32. Since the inner and outer sides of the bearing 32 are freely rotatable, when the hollow cavity 11 of the motor shaft 12 rotates, the sleeve 3 is not affected by the motor shaft 12, and can remain relatively stationary with the stator of the motor 1. . The bearing 32 between the sleeve 3 and the inner wall of the hollow body 11 of the motor shaft 1 may be plural, for example, two bearings respectively disposed at both ends of the sleeve, so that the relative rotation of the sleeve 3 and the motor shaft 12 can be significantly increased. Time stability.

Similarly, the motor shaft 12 can also be a fixed shaft that is fixed to the stator. FIG. 3 is a schematic structural diagram of another power device according to Embodiment 1 of the present invention. As shown in FIG. 3, in this embodiment, the overall structure of the power unit is similar to that of the previous embodiment, except that in the present embodiment, the motor shaft 12 of the motor is fixedly connected to the stator 14 of the motor 1, and is located at the same time. The rotor casing 13 outside the motor 1 rotates around the motor shaft 12, and the rotor casing 13 is fixedly coupled to the hub 21 for driving the hub 21 to rotate. The hollow cavity 11 for the cable 41 is disposed inside the motor shaft 12, and the sleeve 3 is fixedly coupled to the motor shaft 12 of the motor 1.

Since the motor shaft 12 and the stator 14 are fixedly connected, the motor shaft 12 cannot be rotated. At this time, the sleeve 3 can be directly fixedly connected to the hollow cavity 11 of the motor shaft 12, since both the sleeve 3 and the motor shaft 12 are Static state, so the cable 41 will not rotate, so it will not wrap Winding or even breaking phenomenon.

Specifically, the sleeve 3 can have an interference fit with the motor shaft 12 of the motor 1. At this time, the outer side of the sleeve 3 and the inner wall of the hollow body 11 have a large frictional force, which makes it difficult to achieve rotation, and also prevents the sleeve 3 from falling out of the hollow cavity 11 of the motor shaft 12.

As an alternative, since the motor shaft 12 itself cannot be rotated, the bushing can no longer be provided in the power unit. 4 is a schematic structural view of still another motor according to Embodiment 1 of the present invention. As shown in FIG. 4, at this time, the hollow cavity 11 is still disposed inside the motor shaft 12, and the rotor case 13 of the motor 1 is fixedly connected with the hub 21 for driving the hub 21 to rotate; the motor shaft 12 passes through the hub 21 And the hub 21 rotates about the motor shaft 12. In this case, the cable 41 can directly pass through the hollow cavity 11 of the motor shaft 12, because the motor shaft 12 is stationary, so that the cable 41 passing through the motor shaft 12 is in contact with the inner wall of the hollow body 11, There is also no rotation or entanglement.

In the above embodiment, since the motor shaft 12 passes through the through hole of the hub 21, in order to prevent the hub 21 from contacting the motor shaft 12 and increasing the stability of the rotation of the hub 21, the motor shaft 12 and the hub 21 are A bearing 121 is also provided between the sleeves. The bearing 121 can maintain the relative rotation between the hub 21 and the motor shaft 12 and provide a certain supporting effect for the hub 21.

As another alternative embodiment, the motor in the power unit may also be an inner rotor motor. At this time, the external part of the motor 1 is a fixed stator, and the motor shaft 12 in the center of the motor 1 can be rotated by the rotor; the motor shaft 12 is simultaneously fixedly connected with the hub 21, and can be used to drive the hub 21 to rotate. The hollow cavity 11 is disposed inside the motor shaft 12, and the sleeve 3 passes through the motor shaft 12 and is rotatable relative to the motor shaft 12. At this time, the sleeve 3 can also be fixed to the non-rotatable portion of the motor 1, or the external structure for connecting the electric, 1 and remain stationary with respect to the motor 1, so that the cable is inserted through the sleeve 3. 41 can also be protected by the bushing. In order to realize the rotatable connection between the sleeve 3 and the motor shaft 12, bearings and the like can also be arranged between the sleeve 3 and the motor shaft 12. The specific implementation has been described in detail in the embodiment of the outer rotor motor described above. , will not repeat them here.

In this embodiment, the power device includes a motor and a propeller, and the motor is used to drive the propeller to rotate. The motor has a hollow cavity that is open at both ends, and the hollow cavity extends from the top of the motor to the bottom along the axial direction of the motor; the propeller includes a hub and a blade connected to the hub, the hub is provided with a through hole; and the hub is fixedly coupled to the motor, and the through hole of the hub corresponds to the hollow cavity of the motor to form a cable for electrically connecting the antenna Threading holes. This way in the power unit, the propeller and the motor The top position of the antenna can be set, and the cable of the antenna can pass through the power device, so that the antenna for transmitting and receiving signals can be set on the power device; the position of the antenna is relatively empty, and the signal quality and signal strength are good. .

FIG. 5 is a schematic cross-sectional view of a power package according to Embodiment 2 of the present invention. FIG. 6 is a schematic structural diagram of a power package according to Embodiment 2 of the present invention. As shown in FIG. 5 and FIG. 6, the power package 200 provided in this embodiment includes the power device 100 and the antenna device 4 in the first embodiment, wherein the antenna device 4 includes an antenna 42 and a receiver 43, and the antenna 42 is located at the power device. At the top end of the hub 21 of the propeller 2 in 100, the cable 41 of the antenna 42 passes through the hollow cavity 11 of the motor 1 in the power unit 100, and is electrically connected to the receiver 43. The structure, function and working principle of the power device 100 have been described in detail in the foregoing first embodiment, and are not described herein again.

Specifically, the power unit 100 includes a motor 1 and a propeller 2, and the motor 1 is generally disposed at a position away from the body of the arm of the UAV, and the propeller 2 is located at the top of the motor 1 to drive the unmanned aerial vehicle to start and stop. . The antenna 42 is located at the top end of the hub 21 of the propeller 2. Because of its high position and away from objects such as the body of the UAV, the signal is less affected by obstacles when transmitting and receiving signals, and a relatively reliable communication and signal transmission process can be realized. The cable 41 of the antenna 42 can pass through a threading hole formed by the hollow cavity 11 of the motor 1 and the through hole 211 of the hub 21 in the power unit 100, and realizes an electrical connection with the receiver 43. In this way, the antenna 42 can maintain signal transmission with devices such as the receiver 43, and realize communication and signal transmission between the UAV and the external device. In general, the antenna 42 is an image transmission antenna or a positioning antenna, and at this time, the antenna 42 is usually a mushroom antenna.

In order to achieve a fixed connection between the antenna 42 and the power unit 100, the antenna assembly 4 further includes a locking member 44; the antenna 42 is disposed at the top end of the locking member 44, and the bottom end of the locking member 44 is located within the hub 21. A corresponding fixing or connecting structure, such as a connecting thread or a snap, may be provided on the locking member 44 to achieve a connection between the antenna 42 and the power unit 100. Generally, since the locking member 44 is connected between the antenna 42 and the power unit 100, the locking member 44 is provided with a through hole 441 for passing the cable 41, so that the cable 41 can pass through the inside of the locking member 44. The wiring is relatively neat.

Alternatively, the bottom end of the locking member 44 can be coupled to the motor shaft 12 or the top end of the sleeve 3 that passes through the motor shaft 12. The sleeve 3 is generally fixed to the motor shaft 12, or the motor mount 5, and the like. The connection is such that when the bottom end of the locking member 44 is connected to the sleeve 3, the antenna 42 is fixed to the motor shaft 12 or the motor mount 5, thereby fixing the antenna 42.

Therein, the bottom end of the locking member 44 and the motor shaft 12 or the top end of the sleeve 3 are typically threaded. Thus, the antenna device 4 can be easily detached or mounted from the power unit 100 by screwing the locking member 44, thereby realizing quick loading and unloading of the power package 200. In addition, when the motor 1 in the power unit 100 is an outer rotor motor and thus does not include a bushing, a threaded connection such as a threaded hole may be provided at the top end of the fixed motor shaft 12 of the motor 1 at this time, and the locking is performed. The piece 44 is screwed directly to the motor shaft 12.

As a preferred embodiment, the locking member 44 can be a lock nut having a polygonal outer surface, and the top end of the lock nut is used to set the antenna 42. The lock nut 44 has a threaded bore that can be conveniently threadedly coupled to the antenna 42 or the power unit 100. At the same time, the outer surface of the lock nut 44 can be a polygon such as a hexagon or an octagon, so that the user or the maintenance personnel can quickly turn the lock nut by using a wrench or other tools to realize quick disassembly and assembly of the antenna.

Additionally, the receiver 43 that is electrically coupled to the antenna 42 can also be located at different locations. FIG. 7 is a schematic cross-sectional view of another power package according to Embodiment 2 of the present invention. FIG. 8 is a schematic structural diagram of another power package according to Embodiment 2 of the present invention. As shown in FIGS. 7 and 8, in the power pack 300, the receiver 43 of the antenna device 4 can be fixed to the bottom of the antenna 42 and integrated with the antenna 42. At this time, the cable 41 passing through the hollow cavity 11 of the motor 1 can be used to implement signal transmission between the receiver 43 and other devices of the UAV, such as the controller.

In this embodiment, the power package includes a power device and an antenna device, wherein the antenna device includes an antenna and a receiver, the antenna is located at a top end of the propeller hub of the power device, and the cable of the antenna passes through the hollow cavity of the motor in the power device And electrically connected to the receiver. In this way, the antenna in the antenna device can be disposed at the top position of the power device, the position of the antenna is relatively empty, and the surrounding obstruction is less, so that the antenna can have better signal strength.

FIG. 9 is a schematic structural diagram of an unmanned aerial vehicle according to Embodiment 3 of the present invention. As shown in FIG. 9, in this embodiment, the unmanned aerial vehicle 500 includes a frame 401 and a power package 400 described in the foregoing second embodiment. The frame 401 is provided with a motor mount 5, and the motor 1 in the power pack 400 It is disposed on the motor mount 5, and the antenna device 4 and the propeller 2 in the power pack 400 are both located on the side of the motor 1 remote from the motor mount 5.

Specifically, the rack 401 of the UAV 500 may generally include an organic arm and a landing gear, and the arm extends from the body of the UAV. The arm is provided with a motor mount 5 for arranging the motor 1, and the power kit 400 The motor 1 is fixedly disposed on the motor mount 5, and when the motor 1 drives the propeller 2 to rotate, the entire unmanned aerial vehicle 500 can be driven to fly. The antenna device 4 is located at the top end of the motor 1 and the propeller 2, and has a high setting height and is away from other parts of the UAV 500, so that the signal strength is good and the reliability of signal transmission is also high.

Among them, the motor 1 is usually located outside the body of the UAV 500. Thus, the motor 1 is far away from other parts of the UAV 500, and the space around the antenna device 4 is relatively empty, and the signal transmission effect is better.

In general, the number of power packs on an unmanned aerial vehicle may be one or more. FIG. 10 is a schematic diagram of an antenna coverage range of an unmanned aerial vehicle according to Embodiment 3 of the present invention. As shown in FIG. 10, when the number of the power package 400 is plural, the antennas in the power package 400 may be directional antennas with narrow beams, and the antennas are respectively oriented in different directions in the horizontal circumferential direction, so that all the antennas are in 360° omnidirectional coverage in the horizontal direction. For example, four power packs may be provided and respectively disposed on the four arms of the UAV 500, the antennas on each power pack are oriented in different directions on the horizontal outer side of the UAV 500, and each antenna covers at least 90 The range of °, so that the four power sets can work together to achieve horizontal omnidirectional coverage. Since the directional antenna has a large transmission distance, a large antenna coverage can be achieved.

In this embodiment, the unmanned aerial vehicle includes a frame and a power package, and the motor mount is disposed on the frame, and the motor in the power package is disposed on the motor mount, and the antenna device and the propeller in the power package are located far away from the motor. One side of the motor mount. In this way, the antenna device is located at the top of the motor and the propeller, and the installation height is high, and away from other parts of the UAV, so the signal strength is good, the reliability of signal transmission is also high, and the reliable communication of the UAV can be realized.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A power device, comprising: a motor for driving rotation of the propeller, and a propeller having a hollow cavity at both ends, the hollow cavity being oriented along an axis of the motor The top of the motor extends to the bottom;

The propeller includes a hub and a blade coupled to the hub, the hub being provided with a through hole;

Wherein the hub is fixedly coupled to the motor, and the through hole of the hub corresponds to a hollow cavity of the motor to form a threading hole through which a cable electrically connected to the antenna passes.
The power unit according to claim 1, wherein said cable comprises at least one of: a power supply line for supplying power to said antenna, and a feed line for transmitting signals.
The power unit according to claim 1 or 2, further comprising a sleeve, the sleeve being threaded through the hollow cavity of the motor, the inner diameter of the sleeve being larger than the outer diameter of the cable .
The power unit according to claim 3, wherein the bottom end of the sleeve is provided with a limiting portion for maintaining a relatively fixed position with the motor mount or the motor base.
The power unit according to claim 4, wherein the limiting portion is a screw fastening portion, and the motor mount or the motor base is provided with a screw hole that is screwed to the screw fastening portion.
The power unit according to claim 4, wherein one of the open ends of the sleeve projects beyond the hub, and the other open end projects from the bottom of the hollow body near the bottom of the motor. Opening.
A power unit according to any one of claims 3-6, wherein said motor is an outer rotor motor, a stator of said motor surrounds said hollow cavity, said hub follows a rotor casing of said motor Turn together.
The power unit according to claim 7, wherein said motor comprises a motor shaft, said hub being sleeved outside said top end of said motor shaft, and fixedly coupled to said motor shaft for following Rotating the rotation of the motor shaft; the hollow cavity is disposed inside the motor shaft, the sleeve passes through the motor shaft and is rotatable relative to the motor shaft.
The power unit according to claim 8, wherein said sleeve and said inner wall of said hollow body are connected by bearings.
The power unit according to claim 7, wherein said motor comprises a motor shaft, said motor shaft being fixedly coupled to a stator of said motor; said rotor housing of said motor rotating about said motor shaft, and The hub is fixedly coupled for driving the hub to rotate; the hollow cavity is disposed inside the motor shaft, and the sleeve is fixedly connected to a motor shaft of the motor.
The power unit of claim 10 wherein said sleeve is in interference fit with said motor shaft.
The power unit according to claim 3, wherein the motor is an inner rotor motor, and a motor shaft of the motor is fixedly coupled to the hub for driving the hub to rotate; the hollow body Provided inside the motor shaft, the sleeve passes through the motor shaft and is rotatable relative to the motor shaft.
A power unit according to claim 1 or 2, wherein said motor is an outer rotor motor, said motor includes a motor shaft, said hollow cavity is disposed inside said motor shaft, and said rotor casing of said motor Fixedly coupled to the hub for driving the hub to rotate; the motor shaft passes through the hub, and the hub rotates about the motor shaft.
The power unit according to claim 13, wherein a bearing is disposed between the motor shaft and the hub.
A power kit includes a power unit and an antenna device, the antenna device including an antenna and a receiver, the antenna being located at a top end of a propeller hub of the power unit, the cable of the antenna passing through the power unit a hollow cavity in the middle and electrically connected to the receiver;

Wherein the power device includes a motor and a propeller, the motor is configured to drive the propeller to rotate, the motor has a hollow cavity at both ends, the hollow cavity body is in the axial direction of the motor from the The top of the motor extends to the bottom;

The propeller includes a hub and a blade coupled to the hub, the hub being provided with a through hole;

Wherein the hub is fixedly coupled to the motor, and the through hole of the hub corresponds to a hollow cavity of the motor to form a threading hole through which a cable electrically connected to the antenna passes.
The power kit according to claim 15, wherein the cable comprises at least one of: a power line for powering the antenna, and a feeder for transmitting a signal.
A power kit according to claim 15 or 16, further comprising a shaft The sleeve is threaded through the hollow cavity of the motor, and the inner diameter of the sleeve is larger than the outer diameter of the cable.
The power kit according to claim 17, wherein the bottom end of the sleeve is provided with a limiting portion for maintaining a relatively fixed position with the motor mount or the motor base.
The power kit according to claim 18, wherein the limiting portion is a screw fastening portion, and the motor mount or the motor base is provided with a screw hole that is screwed to the screw fastening portion.
The power kit according to claim 18, wherein one of the open ends of the sleeve projects beyond the hub, and the other open end projects from the bottom of the hollow body near the bottom of the motor. Opening.
A power kit according to any one of claims 17 to 20, wherein the motor is an outer rotor motor, a stator of the motor surrounds the hollow cavity, and the hub follows a rotor case of the motor Turn together.
The power kit according to claim 21, wherein said motor comprises a motor shaft, said hub being sleeved outside said top end of said motor shaft, and fixedly coupled to said motor shaft for following Rotating the rotation of the motor shaft; the hollow cavity is disposed inside the motor shaft, the sleeve passes through the motor shaft and is rotatable relative to the motor shaft.
The power kit according to claim 22, wherein the sleeve and the inner wall of the hollow body are connected by bearings.
The power kit according to claim 21, wherein said motor comprises a motor shaft, said motor shaft being fixedly coupled to a stator of said motor; said rotor housing of said motor rotating about said motor shaft, and The hub is fixedly coupled for driving the hub to rotate; the hollow cavity is disposed inside the motor shaft, and the sleeve is fixedly connected to a motor shaft of the motor.
The power kit of claim 24 wherein said sleeve is in interference fit with said motor shaft.
The power kit according to claim 17, wherein the motor is an inner rotor motor, and a motor shaft of the motor is fixedly coupled to the hub for driving the hub to rotate; the hollow body Provided inside the motor shaft, the sleeve passes through the motor shaft and is rotatable relative to the motor shaft.
The power kit according to claim 15 or 16, wherein the motor is an outer rotor motor, the motor includes a motor shaft, the hollow cavity is disposed inside the motor shaft, and the rotor shell of the motor Fixedly coupled to the hub for driving the hub to rotate; the motor shaft passes through the hub, and the hub rotates about the motor shaft.
The power kit according to claim 27, wherein a bearing is interposed between the motor shaft and the hub. .
The power kit according to claim 15 or 16, wherein the antenna device further comprises a locking member; the antenna is disposed at a top end of the locking member, and a bottom end of the locking member is located at the Inside the hub.
A power kit according to claim 29, wherein the bottom end of the locking member is coupled to the motor shaft or the top end of the sleeve passing through the motor shaft.
A power kit according to claim 30, wherein a bottom end of said locking member is threadedly coupled to said motor shaft or a top end of said sleeve passing through said motor shaft.
The power kit according to claim 29, wherein the locking member is provided with a through hole for passing the cable.
A power kit according to claim 29, wherein said locking member is a lock nut, said lock nut having a polygonal outer surface, and a top end of said lock nut is for setting said antenna.
A power kit according to claim 15 or 16, wherein said receiver is fixed to the bottom of said antenna and integrated with said antenna.
A power kit according to claim 15 or 16, wherein the antenna is an image transmission antenna or a positioning antenna.
A power kit according to claim 15 or 16, wherein the antenna has a mushroom shape.
An unmanned aerial vehicle, comprising: a frame and a power kit, the frame is provided with a motor mount, a motor in the power kit is disposed on the motor mount, and the power kit is The antenna device and the propeller are both located on a side of the motor remote from the motor mount;

The power kit includes a power unit including an antenna and a receiver, the antenna being located at a top end of a propeller hub of the power unit, and a line of the antenna a cable passing through the hollow cavity in the power unit and electrically connected to the receiver;

Wherein the power device includes a motor and a propeller, the motor is configured to drive the propeller to rotate, the motor has a hollow cavity at both ends, the hollow cavity body is in the axial direction of the motor from the The top of the motor extends to the bottom;

The propeller includes a hub and a blade coupled to the hub, the hub being provided with a through hole;

Wherein the hub is fixedly coupled to the motor, and the through hole of the hub corresponds to a hollow cavity of the motor to form a threading hole through which a cable electrically connected to the antenna passes.
The UAV according to claim 37, wherein said cable comprises at least one of: a power supply line for powering said antenna, and a feed line for transmitting signals.
The UAV according to claim 37 or claim 38, further comprising a sleeve, the sleeve being threaded through the hollow cavity of the motor, the inner diameter of the sleeve being larger than the outer diameter of the cable path.
The UAV according to claim 39, wherein the bottom end of the sleeve is provided with a limiting portion for maintaining a relatively fixed position with the motor mount or the motor base.
The UAV according to claim 40, wherein the limiting portion is a threaded fastening portion, and the motor mount or the motor base is provided with a screw hole that is screwed to the screw fastening portion.
The UAV according to claim 39, wherein one of the open ends of the sleeve projects beyond the hub, and the other open end projects from the bottom of the hollow body near the bottom of the motor The opening.
An unmanned aerial vehicle according to any one of claims 39 to 42, wherein said motor is an outer rotor motor, a stator of said motor surrounds said hollow cavity, said hub follows a rotor of said motor The shell rotates together.
The UAV according to claim 43, wherein said motor comprises a motor shaft, said hub being sleeved outside said top end of said motor shaft and fixedly coupled to said motor shaft for following The motor shaft rotates while rotating; the hollow cavity is disposed inside the motor shaft, the sleeve passes through the motor shaft, and is rotatable relative to the motor shaft.
The UAV according to claim 44, wherein the sleeve and the inner wall of the hollow body are connected by bearings.
The UAV according to claim 43, wherein said motor comprises a motor shaft, said motor shaft being fixedly coupled to a stator of said motor; said rotor housing of said motor rotating about said motor shaft, and A fixed connection with the hub for driving the hub; the hollow cavity is disposed inside the motor shaft, and the sleeve is fixedly coupled to a motor shaft of the motor.
The UAV according to claim 46, wherein said sleeve is in interference fit with said motor shaft.
The UAV according to claim 43, wherein the motor is an inner rotor motor, and a motor shaft of the motor is fixedly coupled to the hub for driving the hub to rotate; The body is disposed inside the motor shaft, the sleeve passes through the motor shaft and is rotatable relative to the motor shaft.
An unmanned aerial vehicle according to claim 37 or claim 38, wherein said motor is an outer rotor motor, said motor comprises a motor shaft, said hollow cavity being disposed inside said motor shaft, said motor rotor A housing is fixedly coupled to the hub for driving the hub to rotate; the motor shaft passes through the hub, and the hub rotates about the motor shaft.
The UAV according to claim 49, wherein a bearing is disposed between the motor shaft and the hub. .
The UAV according to claim 37 or 38, wherein the antenna device further comprises a locking member; the antenna is disposed at a top end of the locking member, and the bottom end of the locking member is located at Inside the hub.
The UAV according to claim 51, wherein the bottom end of the locking member is coupled to the motor shaft or the top end of the sleeve passing through the motor shaft.
The UAV according to claim 52, wherein a bottom end of said locking member is threadedly coupled to said motor shaft or a top end of said sleeve passing through said motor shaft.
The UAV according to claim 51, wherein the locking member is provided with a through hole for passing the cable.
The UAV according to claim 51, wherein the locking member is a lock nut, the lock nut has a polygonal outer surface, and a top end of the lock nut is used to set the antenna .
An unmanned aerial vehicle according to claim 37 or claim 38, wherein said receiver is fixed to the bottom of said antenna and integrated with said antenna.
The UAV according to claim 37 or 38, wherein the antenna is an image transmission antenna or a positioning antenna.
The UAV according to claim 37 or 38, wherein the antenna has a mushroom shape. .
An unmanned aerial vehicle according to claim 37 or 38, wherein said motor is located outside the body of said unmanned aerial vehicle.
The unmanned aerial vehicle according to claim 37 or claim 38, wherein the number of the power kits is plural, the antennas in the power kit are directional antennas, and each of the antennas faces a horizontal circumferential direction. Different directions to make all of the antennas horizontally omnidirectional.