CN104859836A - Unmanned aerial vehicle - Google Patents

Abstract

The invention discloses an unmanned aircraft, which includes an aircraft body and a camera installed on the aircraft body; the unmanned aircraft also includes a plurality of foldable arm assemblies; each arm assembly includes sequentially connected The first arm, the second arm and the third arm; the first arm, the second arm and the third arm are equipped with wings; the first arm is integrally manufactured with the aircraft body; the first A first rotation mechanism is installed between the arm and the second arm; a second rotation mechanism is installed between the second arm and the third arm. An aerial photographing device with a foldable arm assembly structure is installed on an unmanned aerial vehicle of the present invention. When in use, the aerial photographing device can be changed in its external dimensions, thereby being able to adapt to different flight spaces, and furthermore, the aerial photographing device has the ability to operate It is characterized by convenience, quickness, wide application fields and wide adaptability.

Description

UAV

technical field

The invention relates to an unmanned aerial vehicle.

Background technique

 Unmanned aerial vehicles have the characteristics of small size, light weight, low cost, flexible operation and high safety, and can be widely used in military, monitoring, search and rescue, resource exploration and other fields.

The multi-axis unmanned aerial vehicle in the prior art usually includes an aircraft body, a camera installed on the aircraft body, and a plurality of arms arranged around the aircraft body; wings are installed on each arm. However, the arms of existing multicopter UAVs are usually relatively fixed structures. When the flight space or environment of the multicopter UAV changes (for example, the flight space becomes smaller), due to the size of the multicopter UAV It cannot be changed, which makes it difficult for multi-axis unmanned aerial vehicles to be used in smaller flying spaces.

Contents of the invention

The object of the present invention is to provide an unmanned aerial vehicle, which includes an aircraft body and a camera installed on the aircraft body, which together form a complete set of aerial photography equipment. When in use, the unmanned aerial vehicle can be changed in its external dimensions, so that it can adapt to different flight spaces, so that the aerial photography device has the characteristics of convenient and quick operation, wide application fields and wide adaptability.

In order to achieve the above object, the technical solution of the present invention is:

An unmanned aerial vehicle, comprising an aircraft body, and a camera mounted on the aircraft body; the unmanned aerial vehicle also includes a plurality of foldable arm assemblies; each of the arm assemblies includes sequentially connected first arms, The second arm and the third arm; the first arm, the second arm and the third arm are equipped with wings; the first arm is integrally manufactured with the aircraft body; the first arm and the A first rotation mechanism is installed between the second arms; a second rotation mechanism is installed between the second arm and the third arm; wherein,

The first rotating mechanism includes a first fixed shaft, a first rotating sleeve is mounted on the outer wall of the first fixed shaft, and a transmission gear is coaxially installed on the outer wall of the first rotating sleeve; The first rotating mechanism also includes a motor installed on the first arm, a gear set and a wireless control device for controlling the rotation of the motor are installed between the motor and the transmission gear;

The second rotating mechanism includes a second fixed shaft, the outer wall of the second fixed shaft is rotatably provided with a second rotatable sleeve, and the second rotatable sleeve is located at one end of the third arm; the second The rotating sleeve is in friction fit with the second fixed shaft.

The gear set includes a first gear, an annular rack, a second gear and a third gear; wherein the first gear is set on the rotating shaft of the motor; an annular rack is rotatably installed on the first arm, and the The annular rack is installed in engagement with the first gear; the annular rack is installed coaxially with the second gear; and a third gear is installed in engagement between the second gear and the transmission gear.

The number of teeth of the ring rack is greater than the number of teeth of the second gear.

The transmission gear, the first gear, the second gear and the third gear are all spur gears.

Four arm assemblies are evenly distributed around the aircraft body.

A camera is rotatably installed on the aircraft body.

The beneficial effects of the present invention are: the unmanned aerial vehicle of the present invention adopts the structure of the foldable arm assembly, and when in use, the unmanned aerial vehicle can be changed in its external dimensions, thereby being able to adapt to different flight spaces, and then making the unmanned aerial vehicle The application field of the manned aircraft is wider; moreover, the structure of the first rotating mechanism and the second rotating mechanism in the arm assembly is adopted. When the unmanned aerial vehicle is in flight, the action of the first rotating mechanism can be controlled by the remote control device to change The external dimensions of the unmanned aerial vehicle are convenient and quick to operate, and have wider adaptability; when the unmanned aerial vehicle is in a stopped state, the external dimensions of the unmanned aerial vehicle can be changed by manually rotating the second rotating mechanism, which The operation is also convenient and fast.

Description of drawings

Fig. 1 is the schematic diagram of the three-dimensional structure of the unmanned aerial vehicle provided by the preferred embodiment of the present invention;

Fig. 2 is an internal enlarged structure diagram of an arm assembly in the unmanned aerial vehicle shown in Fig. 1;

Fig. 3 is an internal enlarged structure diagram of the first rotating mechanism in the unmanned aerial vehicle shown in Fig. 1;

Fig. 4 is a partially enlarged structural diagram of the first rotating mechanism in the unmanned aerial vehicle shown in Fig. 1;

Fig. 5 is an enlarged internal structure diagram of the second rotating mechanism in the unmanned aerial vehicle shown in Fig. 1 .

Detailed ways

As shown in FIG. 1 and FIG. 2 , an unmanned aerial vehicle of this embodiment includes an aircraft body 1 , a camera 2 , an arm assembly 3 and a wing 4 .

Specifically, as shown in FIG. 1 , the aircraft body 1 is a main part of an unmanned aerial vehicle, which is a common structure in the prior art, and will not be repeated here. The camera 2 is installed below the aircraft body 1 , preferably, the camera 2 is rotatably installed on the aircraft body 1 , which can make the shooting range of the camera 2 wider.

As shown in FIG. 1 and FIG. 2 , there are multiple arm assemblies 3 arranged around the aircraft body 1 . In this embodiment, preferably, there are four arm assemblies 3 , and the four arm assemblies 3 are evenly distributed around the aircraft body 1 . The arm assembly 3 includes a first arm 31 , a second arm 32 , a third arm 33 , a first rotation mechanism 34 and a second rotation mechanism 35 .

Wherein, the first arm 31, the second arm 32, and the third arm 33 are substantially straight structures, the first arm 31 is integrally manufactured with the aircraft body 1, each first arm 31, each second arm 32 And each third arm 33 is equipped with a wing 4, the rotation plane of the first arm 31, the second arm 32 and the third arm 33 and the rotation axis of the wing 4 are perpendicular to each other, and the wing 4 is common in the prior art. structure, which will not be repeated here.

As shown in FIG. 3 and FIG. 4 and referring to FIG. 2 , the first arm 31 and the second arm 32 are connected through a first rotating mechanism 34 to realize the rotational connection of the two. In this embodiment, the first rotating mechanism 34 includes a first fixed shaft 341 , a first rotating sleeve 342 , a transmission gear 343 , a motor 344 and a gear set 345 .

The first fixed shaft 341 in this embodiment is roughly cylindrical, and the first fixed shaft 341 is installed on the end of the first arm 31 away from the aircraft body 1. In this embodiment, the first fixed shaft 341 is connected to the first fixed shaft. One arm 31 is manufactured in one piece. The first rotating sleeve 342 is roughly a hollow ring structure. The first rotating sleeve 342 is installed on the end of the second arm 32 away from the third arm 33 . The outer wall of the first fixed shaft 341 is equipped with a first rotating sleeve. Set 342. In this embodiment, the first rotating sleeve 342 and the second arm 32 are integrally manufactured. A transmission gear 343 is mounted on the outer wall of the first rotating sleeve 342 coaxially with the first rotating sleeve 342 , that is, a gear structure coaxially arranged with the first rotating sleeve 342 is provided on the outer circumference of the first rotating sleeve 342 . In this embodiment, the transmission gear 343 is a spur gear, which is arranged coaxially with the rotation axis of the wing 4 . A motor 344 is also installed on the first arm 31 , which is used to drive the transmission gear 343 to rotate.

A gear set 345 is connected between the motor 344 and the transmission gear 343 . Specifically, the gear set 345 includes a first gear 3451 , a ring rack 3452 , a second gear 3453 and a third gear 3454 . Wherein, a first gear 3451 is set on the rotating shaft of the motor 344, and an annular rack 3452 is rotatably installed on the first arm 31, and the annular rack 3452 is engaged with the first gear 3451 and installed, and the annular rack 3452 It is installed coaxially with the second gear 3453 , and the second gear 3453 is installed in engagement between the third gear 3454 and the transmission gear 343 . In this embodiment, the number of teeth of the ring rack 3452 is greater than the number of teeth of the second gear 3453 , that is, the ring rack 3452 and the second gear 3453 form a reduction gear set to reduce the speed. Preferably, the first gear 3451 , the second gear 3453 and the third gear 3454 are spur gears with simple structure and low cost.

In this embodiment, the first rotating mechanism 34 also includes a wireless control device (not shown) for controlling the rotation of the motor 344, and the remote controller (not shown) of the unmanned aerial vehicle can wirelessly control the wireless control device to The user can control the rotation of the arm assembly 3 during the flight of the UAV to change the external dimensions of the UAV, and the operation is relatively simple. The wireless control device is a common structure in the prior art, and will not be repeated here.

As shown in FIG. 5 and referring to FIG. 2 , the second rotating mechanism 35 includes a second fixed shaft 351 and a second rotating sleeve 352 . The second fixed shaft 351 is substantially cylindrical, and the second rotating sleeve 352 is substantially a hollow ring structure. The second rotating sleeve 352 is rotatably mounted on the outer wall of the second fixed shaft 351 . The second arm 32 is equipped with a second fixed shaft 351, and the second arm 32 is integrally manufactured with the second fixed shaft 351; the third arm 33 is equipped with a second rotating sleeve 352 , and the third arm 33 is integrally manufactured with the second rotating sleeve 352 . In this embodiment, the second rotating sleeve 352 is in friction fit with the second fixed shaft 351 . When the third arm 33 is rotated to form a certain angle with the second arm 32, the friction force between the second rotating sleeve 352 and the second fixed shaft 351 can also keep the third arm 33 and the second arm 32 relatively fixed. State, and then change the external dimensions of the arm assembly 3. In this embodiment, when the unmanned aerial vehicle is in a stopped state, the external dimensions of the unmanned aerial vehicle can be changed by manually rotating the second rotating mechanism 35 , which is more convenient and quick to operate.

Using the unmanned aerial vehicle provided in the above embodiment, since the unmanned aerial vehicle adopts the structure of the foldable arm assembly 3, when in use, the unmanned aerial vehicle can change its external dimensions, thereby being able to adapt to different flight spaces, and then make the unmanned aerial vehicle The application fields of the unmanned aerial vehicle are wider; moreover, the structure of the first rotating mechanism 34 and the second rotating mechanism 35 in the arm assembly 3 is adopted, when the unmanned aerial vehicle is in flight, the first rotating mechanism can be controlled by a remote control device. The rotating mechanism 34 acts to change the external dimensions of the unmanned aerial vehicle, which is convenient and quick to operate and has wider adaptability; when the unmanned aerial vehicle is in a shutdown state, the second rotating mechanism 35 can be manually turned to change the The size of the aircraft is also convenient and quick to operate. In this embodiment, the external dimensions of the arm assembly 3 can be changed manually or electrically, making the operation easier for the user.

Claims (7)

1. An unmanned aerial vehicle comprises an aircraft body (1) and a camera (2) mounted on the aircraft body (1); the method is characterized in that: the unmanned aerial vehicle further comprises a foldable arm assembly (3); the arm assembly (3) comprises a first arm (31), a second arm (32) and a third arm (33) which are connected in sequence; the first arm (31), the second arm (32) and the third arm (33) are all provided with wings (4); the first arm (31) is made integral with the aircraft body (1); a first rotating mechanism (34) is arranged between the first arm (31) and the second arm (32); a second rotating mechanism (35) is arranged between the second arm (32) and the third arm (33); wherein,

the first rotating mechanism (34) comprises a first fixed shaft (341), a first rotating sleeve (342) is rotatably sleeved on the outer wall of the first fixed shaft (341), and a transmission gear (343) is coaxially arranged on the outer wall of the first rotating sleeve (342); the first rotating mechanism (34) further comprises a motor (344) arranged on the first arm (31), and a gear set (345) and a wireless control device for controlling the rotation of the motor (344) are arranged between the motor (344) and the transmission gear (343);

the second rotating mechanism (35) comprises a second fixed shaft (351), a second rotating sleeve (352) is rotatably sleeved on the outer wall of the second fixed shaft (351), and the second rotating sleeve (352) is positioned at one end of the third arm (33); the second rotating sleeve (352) is in friction fit with the second fixed shaft (351).

2. The unmanned aerial vehicle of claim 1, wherein: the transmission gear (343) is coaxially mounted with a rotating shaft of the wing (4) on the first arm (31); the first arm (31) is provided with a first fixed shaft (341), and the first arm (31) and the first fixed shaft (341) are manufactured integrally; the second arm (32) is provided with a first rotating sleeve (342), and the second arm (32) and the first rotating sleeve (342) are manufactured integrally; the second arm (32) is provided with a second fixed shaft (351), and the second arm (32) and the second fixed shaft (351) are manufactured integrally; the third arm (33) is provided with a second rotating sleeve (352), and the third arm (33) and the second rotating sleeve (352) are manufactured integrally.

3. The unmanned aerial vehicle of claim 1, wherein: the gear set (345) includes a first gear (3451), an annular rack (3452), a second gear (3453), and a third gear (3454); wherein a first gear (3451) is sleeved on the rotating shaft of the motor (344); an annular rack (3452) is rotatably mounted on the first arm (31), and the annular rack (3452) is meshed with a first gear (3451); the annular rack (3452) and the second gear (3453) are coaxially arranged; a third gear (3454) is meshed and mounted between the second gear (3453) and the transmission gear (343).

4. The unmanned aerial vehicle of claim 3, wherein: the number of teeth of the annular rack gear (3452) is greater than that of the second gear (3453).

5. The unmanned aerial vehicle of claim 3, wherein: the transmission gear (343), the first gear (3451), the second gear (3453) and the third gear (3454) are all straight toothed spur gears.

6. The unmanned aerial vehicle of claim 1, wherein: 4 arm assemblies (3) are uniformly distributed on the periphery of the aircraft body (1).

7. The unmanned aerial vehicle of claim 1, wherein: the aircraft body (1) is rotatably provided with a camera (2).