Unmanned aerial vehicle for express delivery

Abstract

The utility model relates to the technical field of unmanned aerial vehicles, in particular to an express delivery unmanned aerial vehicle which is additionally provided with middle wings, gear motors in the wings drive the wings to rotate in good time so as to adjust the airflow direction, and the flying attitude in the lifting process is rapidly adjusted in a matched mode. When the express delivery unmanned aerial vehicle completes a rising height target, the vehicle arms and the wings gradually rotate to be horizontal, and the aircraft is converted into a horizontal flight state at the same time, due to the fact that the cross sections of the protection rings, the middle wings and the vehicle arms are streamlined, certain lift force can be provided during horizontal flight, part of self-weight of the express delivery unmanned aerial vehicle is counteracted, and propellers do not need to continuously provide vertical lift force; the operation speed of the express unmanned aerial vehicle is accelerated and the transportation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicles, in particular to a delivery unmanned aerial vehicle. Background Art

[0002] A cargo drone is an unmanned aircraft specially used for cargo transportation. In recent years, with the rapid development of the logistics industry and the continuous advancement of drone technology, cargo drones have been widely used at home and abroad. The application advantages of cargo drones are obvious, including improving delivery speed and reducing manpower. At the same time, due to the flexibility and accessibility of drones, some mountainous areas that are difficult to reach quickly through traditional logistics methods can also achieve timely delivery of goods. At present, most cargo or small express delivery drones use traditional blade propellers. Without a protective cover, their open structure makes a huge noise during near-ground flight (such as takeoff and landing), and is dangerous to people.

[0003] Vertical rotor cargo drones have a low power conversion rate. In the process of converting power into cargo transportation, a large part of the power is wasted on maintaining the gravity balance of the drone while it is hovering or moving in the air. In addition, battery energy storage is generally limited. When drones need to be repeatedly charged or replaced for power supply, it is very necessary to reduce the replacement time and increase operational efficiency. Utility Model Content

[0004] The main purpose of the utility model is to provide a delivery drone to solve the problem of low power conversion rate of vertical rotor cargo drones proposed in the related art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a delivery drone is provided, including a fuselage, wings, rotors and a protective ring. The wings have two pieces, which are symmetrically arranged on the upper parts of both sides of the fuselage. The wings include a wing body, a rotating shaft, a bearing and a gear. The rotating shaft is fixedly connected to the wing body. The bearing fixing sleeve is arranged on the outside of the rotating shaft to ensure the rotation of the rotating shaft while also providing support force for it. There are two bearings in total. The gear fixing sleeve is arranged on the outside of the rotating shaft and is located between the two bearings. The rotating shaft is rotatably connected to the fuselage. A No. 3 motor is fixedly provided in front of the rotating shaft. A gear is fixedly provided at one end of the No. 3 motor. The reduction gear set of the No. 3 motor is meshed with the gear of the rotating shaft. The No. 3 motor is used to drive the wing to rotate.

[0006] Furthermore, the rotor has a total of four parts, which are symmetrically arranged on both sides of the fuselage. The rotor includes a connecting shaft, one end of which is rotatably connected to the fuselage. A No. 1 motor is fixedly provided on the front side of the two connecting shafts in front of the fuselage, and the reduction gear sets at both ends of the No. 1 motor are respectively engaged with the two front connecting shafts to drive the two front connecting shafts to rotate; a No. 2 motor is fixedly provided on the rear side of the two connecting shafts behind the fuselage, and the reduction gear sets at both ends of the No. 2 motor are respectively engaged with the two rear connecting shafts to drive the two rear connecting shafts to rotate.

[0007] Furthermore, a machine arm is fixedly provided at the other end of the connecting shaft, an engine casing is fixedly provided at the other end of the machine arm, and an engine is fixedly provided inside the engine casing.

[0008] Furthermore, the engine is composed of a stator, a rotor, an air inlet cover, and an air outlet cover. The rotor is sleeved inside the stator, and the two are installed together inside the engine shell. The air inlet cover and the air outlet cover are respectively installed at the top and bottom ends of the engine shell, and the rotor extends out of the engine shell and is connected to the annular propeller blades to drive the annular propeller blades to rotate.

[0009] Furthermore, the stator, the rotor, the air inlet cover and the air outlet cover are all hollow inside, and a plurality of air inlet holes communicating with the inside are formed on the surface of the air inlet cover.

[0010] Furthermore, the annular propeller blades are made of lightweight and high-strength carbon fiber aramid composite materials to reduce the blade's own weight and increase the engine's electrical energy conversion efficiency.

[0011] Furthermore, there are two protection circles, which are respectively located in front and rear of the top of the express drone. The protection circles and the wings are streamlined in design to provide lift during horizontal flight. The protection circle includes a connecting rod, and arc circles are fixed at both ends of the connecting rod. The arc circles are concentric with the annular propeller blades, and legs are fixed on both sides of the lower side of the connecting rod, and the other ends of the legs are fixedly connected to the top of the express drone.

[0012] Furthermore, the fuselage includes a cabin door, a power source for driving the cabin door to close and open is fixedly provided on the fuselage, the cabin door is hinged to the fuselage, a slide groove is fixedly provided on the inner bottom surface of the fuselage, there are two slide grooves arranged in parallel, a pulley is provided in the slide groove, and the pulley is slidably connected to the slide groove.

[0013] Compared with the prior art, the utility model has the following beneficial effects: when the express UAV is ascending or descending in a parabolic flight trajectory, the motor in the wing drives the wing to rotate and adjust to a suitable state, adjusts the air resistance, and accelerates the flight state adjustment of the express UAV; during the vertical take-off and landing process, the motor in the connecting shaft drives the machine arm to rotate, so that the machine arm is in a vertical state, at this time the annular propeller blade is in a horizontal state, the engine drives the annular propeller blade to rotate, sucks in the air above it and presses it downward, the reaction force of the air on the annular propeller blade causes it to rise, and the annular propeller blades at the four corners work simultaneously to quickly lift the express UAV, when the express UAV rises to a certain height and turns to horizontal flight, the motor in the wing drives the wing to rotate to a horizontal state, and in a near-horizontal flight state with a certain flight speed, the wing, the machine arm and the protection ring will all be able to provide a certain lift to offset part of the deadweight of the express UAV; at this time the annular propeller blade is in a vertical state, the engine drives the annular propeller blade to rotate, and converts most of the electrical energy into the horizontal flight thrust of the express UAV, speeds up the flight speed of the UAV, and improves its transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is one of the overall schematic diagrams of the utility model (vertical flight state);

[0015] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the wing structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the external structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the motor position of the utility model;

[0019] Figure 6 For this utility model Figure 5 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 7 This is a schematic diagram of the engine structure of the utility model;

[0021] Figure 8 This is a schematic diagram of the spiral groove structure of the engine rotor of the utility model;

[0022] Fig. 9 This is the second overall schematic diagram of the utility model (horizontal flight state).

[0023] Illustration Description:

[0024] 1. fuselage; 101. cabin door; 102. slideway; 103. pulley;

[0025] 2. Wing; 201. Wing body; 202. Rotating shaft; 203. Bearing; 204. First reduction gear; 205. Second reduction gear;

[0026] 3. Rotor; 301. Annular propeller blades; 302. Engine casing; 303. Machine arm; 304. Connecting shaft; 305. Engine; 3051. Stator; 3052. Rotor; 3053. Air inlet cover; 3054. Air outlet cover; 3055. Spiral groove.

[0027] 4. protection ring; 401. connecting rod; 402. arc circle; 403. outrigger;

[0028] 501, motor No. 1; 502, motor No. 2; 503, motor No. 3. DETAILED DESCRIPTION

[0029] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0030] See also Figures 1 to 9 The present embodiment provides a delivery drone, including a fuselage 1, wings 2, rotors 3 and a protective ring 4. The wings 2 have two pieces, which are symmetrically arranged on the upper parts of both sides of the fuselage 1. The wings 2 include a wing body 201, a rotating shaft 202, a bearing 203 and a gear. The rotating shaft 202 is fixedly connected to the wing body 201. The bearing 203 is fixedly sleeved on the outside of the rotating shaft 202 to ensure that the rotating shaft 202 rotates while also providing support for it. There are two bearings 203. The gear is fixedly sleeved on the outside of the rotating shaft 202 and located between the two bearings 203. The rotating shaft 202 is fixedly sleeved on the outside of the rotating shaft 202 and provided with support force. The fuselage 1 is rotatably connected, and a No. 3 motor 503 is fixedly provided in front of the rotating shaft 202. A reduction gear set is fixedly sleeved on one end of the No. 3 motor 503. The reduction gear set of the No. 3 motor 503 is engaged with the gear of the rotating shaft 202. The rotation of the No. 3 motor 503 drives the rotating shaft 202 to rotate through the reduction gear set. The No. 3 motor 503 is used to drive the wing 2 to rotate. During the lifting and lowering process of the express drone, the wing body 201 is in a vertical, horizontal or inclined state to adjust the air resistance, so as to quickly realize the attitude adjustment and enhance the flight stability when the ground wind speed is large.

[0031] There are four rotors 3, which are symmetrically arranged on both sides of the fuselage 1. The four rotors 3 work simultaneously to provide powerful thrust and increase the running speed of the express delivery drone;

[0032] The rotor 3 includes a connecting shaft 304, one end of which is rotatably connected to the fuselage 1. A No. 1 motor 501 is fixedly provided on the front side of the two connecting shafts 304 in front of the fuselage 1. Both ends of the No. 1 motor 501 are respectively meshed with the two front connecting shafts 304 through a reduction gear set. When the No. 1 motor 501 rotates, it drives the two front connecting shafts 304 to rotate, which is used to drive the two front connecting shafts 304 to rotate; a No. 2 motor 502 is fixedly provided on the rear side of the two connecting shafts 304 at the rear of the fuselage 1. Both ends of the No. 2 motor 502 are respectively meshed with the two rear connecting shafts 304 through a reduction gear set. When the No. 2 motor 502 rotates, it drives the two rear connecting shafts 304 to rotate, which is used to drive the two rear connecting shafts 304 to rotate.

[0033] It should be noted that the reduction gear sets at both ends of motor No. 1 501 are composed of two reduction gears, which are respectively installed on the output end of motor No. 1 501 and the connecting shaft 304; the reduction gear sets at both ends of motor No. 2 502 are also composed of two reduction gears, which are respectively installed on the output end of motor No. 2 502 and the connecting shaft 304; the reduction gear sets at both ends of motor No. 3 503 are also composed of two reduction gears, which are respectively installed on the output end of motor No. 3 503 and the rotating shaft 202.

[0034] Furthermore, the two reduction gears are respectively a first reduction gear 204 and a second reduction gear 205 , and the difference is that the diameter ratios of the first reduction gear 204 and the second reduction gear 205 at the three motors are different.

[0035] An arm 303 is fixedly provided at the other end of the connecting shaft 304. During the rising process of the express drone, the arm 303 is in a vertical state to reduce air resistance. An engine shell 302 is fixedly provided at the other end of the arm 303. An engine 305 is fixedly provided inside the engine shell 302. The engine shell 302 fixes the engine 305 and the arm 303 together.

[0036] The engine 305 is composed of a stator 3051, a rotor 3052, an air inlet cover 3053, and an air outlet cover 3054. The rotor 3052 is sleeved in the stator 3051, and the two are installed together inside the engine shell 302. The air inlet cover 3053 and the air outlet cover 3054 are installed at the top and bottom of the engine shell 302 respectively, and the rotor 3052 extends out of the engine shell 302 and is connected to the annular propeller blade 301, so as to drive the annular propeller blade 301 to rotate.

[0037] It should be noted that the interior of the stator 3051, the rotor 3052, the air inlet cover 3053, and the air outlet cover 3054 are all hollow, and the surface of the air inlet cover 3053 is provided with a plurality of air inlet holes connected to the interior. During flight, airflow will enter the entire engine 305 from the air inlet holes. Since the interior of the stator 3051, the rotor 3052, the air inlet cover 3053, and the air outlet cover 3054 are all hollow, the airflow will penetrate the entire engine 305, thereby effectively taking away the heat generated when the engine 305 is working. Moreover, in order to prevent the influence of rain and dust, the internal coil of the stator 3051 is sealed with high-temperature thermal conductive epoxy resin. The outer ring of the rotor 3052 is a uniformly distributed neodymium strong magnet, and the aluminum alloy air contact surface of the inner ring is provided with densely distributed spiral grooves 3055 (such as Figure 8 As shown in the figure, by setting a spiral groove 3055 on the rotor 3052, a spiral airflow channel can be formed. When the airflow enters the interior of the engine 305, the airflow can flow along the spiral groove 3055. The flow path of the airflow is spiral. Compared with a straight-through airflow channel, this design can effectively increase the residence time of the airflow inside the engine 305. Not only that, it can also increase the contact area between the airflow and the interior of the engine 305, thereby enhancing the heat dissipation capacity of the engine 305.

[0038] The preferred annular propeller blade 301 has low noise characteristics and is made of a high-strength carbon fiber aramid composite material, and can achieve greater pulling force with a smaller blade deadweight and a lower rotation speed.

[0039] There are two protection circles 4, located in front and rear of the top of the express drone, and the protection circle 4 is also streamlined, which reduces wind resistance and plays a protective role. It includes a connecting rod 401, and arc circles 402 are fixed at both ends of the connecting rod 401. The arc circles 402 are concentric with the annular propeller blades 301. The four arc circles 402 protect the annular propeller blades 301 and the wing body 201 inside, reducing the probability of the annular propeller blades 301 and the wing body 201 colliding with the outside world, and extending the service life of the annular propeller blades 301 and the wing body 201. Support legs 403 are fixed on both sides of the lower side of the connecting rod 401, and the other end of the support legs 403 is fixedly connected to the top of the express drone.

[0040] The fuselage 1 includes a cabin door 101, on which a power source for driving the cabin door 101 to close and open is fixedly provided. The power source adopts an electric telescopic rod, and both ends of the electric telescopic rod are respectively hingedly mounted on the inner top wall of the fuselage 1 and the cabin door 101. The cabin door 101 can be closed and opened by extending and retracting the electric telescopic rod. The cabin door 101 is hinged to the fuselage 1, and a slide groove 102 is fixedly provided on the inner bottom surface of the fuselage 1. There are two slide grooves 102 arranged in parallel. A pulley 103 is provided in the slide groove 102, and the pulley 103 is slidably connected to the slide groove 102. Cargo is placed on the pulley 103 and moves along the slide groove 102, which facilitates the loading of cargo, reduces labor intensity and improves work efficiency.

[0041] During the ascent of the express delivery drone, the motor in the wing 2 drives the wing 2 to rotate in a vertical state, reducing air resistance and accelerating the ascent speed of the express delivery drone; the No. 1 motor 501 in the connecting shaft 304 drives the two arms 303 in front of the drone to rotate through gears, and the No. 2 motor 502 drives the two arms 303 at the rear of the drone to rotate through gears, so that the arms 303 are in a vertical state. At this time, the annular propeller blades 301 are in a horizontal state, and the engine 305 drives the annular propeller blades 301 to rotate to suck in the air above it and press it downward, and the air acts on the annular propeller blades 301. The reaction force of the blades 301 causes it to rise, and the annular propeller blades 301 at the four corners work simultaneously to quickly raise the express drone. When the express drone rises to a certain height, the two No. 3 motors 503 in the wing 2 respectively drive the wings 2 on both sides to rotate to a horizontal state through gears. The cross-section of the wing 2 is streamlined, which can provide a certain lift to offset part of the weight of the express drone; the No. 1 motor 501 and the No. 2 motor 502 in the connecting shaft 304 simultaneously drive the four arms 303 to rotate, making the arms 303 horizontal, while the annular propeller blades 301 are in a vertical state. In the vertical state, the engine 305 drives the annular propeller blades 301 to rotate, providing horizontal thrust for the express drone, accelerating the running speed of the express drone and improving its transportation efficiency; during the descent of the express drone, the two No. 3 motors 503 in the wing 2 respectively drive the wings 2 on both sides to rotate to a vertical state through the reduction gear set, the No. 1 motor 501 in the connecting shaft 304 drives the two arms 303 in front of the drone to rotate through the reduction gear set, and the No. 2 motor 502 drives the two arms 303 at the rear of the drone to rotate through the gears, so that the arms 303 are in a vertical state. At this time, the annular propeller blades 301 at the four corners are all in a horizontal state, and the engine 305 drives the annular propeller blades 301 to rotate to provide downward thrust for the express drone, so that the express drone can land smoothly on the ground; the annular propeller blades 301 work together with the wings 2 to achieve rapid fuselage flight attitude adjustment and conversion; in the design of the flight transportation path, if a parabolic trajectory is adopted in the descent process, the power consumption can be reduced and the transportation efficiency can be increased. The mid-wing design, because of its airflow adjustment function, has certain stability and energy-saving advantages in the process of parabolic flight path attitude adjustment.

[0042] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A courier drone, comprising a fuselage (1), wings (2), rotors (3) and a protective ring (4), characterized in that: The wing (2) has two pieces, which are symmetrically arranged on the upper parts of both sides of the fuselage (1). The wing (2) comprises a wing body (201), a rotating shaft (202), a bearing (203) and a gear. The rotating shaft (202) is fixedly connected to the wing body (201). The bearing (203) is fixedly sleeved on the outside of the rotating shaft (202) to ensure the rotation of the rotating shaft (202) and provide support force for it. There are two bearings (203). The gear is fixedly sleeved on the outside of the rotating shaft (202) and located between the two bearings (203). The rotating shaft (202) is rotatably connected to the fuselage (1). A No. 3 motor (503) is fixedly arranged in front of the rotating shaft (202). A reduction gear set is fixedly sleeved on one end of the No. 3 motor (503). The gear of the No. 3 motor (503) is meshed with the gear of the rotating shaft (202). The No. 3 motor (503) is used to drive the wing (2) to rotate.

2. The express delivery drone according to claim 1, characterized in that: The rotor (3) has four parts in total, which are symmetrically arranged on both sides of the fuselage (1). The rotor (3) comprises a connecting shaft (304), one end of which is rotatably connected to the fuselage (1). A first motor (501) is fixedly arranged on the front side of the two connecting shafts (304) in front of the fuselage (1). The reduction gear sets at both ends of the first motor (501) are respectively meshed with the two connecting shafts (304) in front, so as to drive the two connecting shafts (304) in front to rotate. A second motor (502) is fixedly arranged on the rear side of the two connecting shafts (304) in the rear of the fuselage (1). The reduction gear sets at both ends of the second motor (502) are respectively meshed with the two connecting shafts (304) in the rear, so as to drive the two connecting shafts (304) in the rear to rotate.

3. The express delivery drone according to claim 2, characterized in that: The other end of the connecting shaft (304) is fixedly provided with a machine arm (303), the other end of the machine arm (303) is fixedly provided with an engine casing (302), and an engine (305) is fixedly provided inside the engine casing (302).

4. The express delivery drone according to claim 3, characterized in that: The engine (305) is composed of a stator (3051), a rotor (3052), an air inlet cover (3053), and an air outlet cover (3054). The rotor (3052) is sleeved in the stator (3051), and the two are installed together inside the engine shell (302). The air inlet cover (3053) and the air outlet cover (3054) are installed at the top and bottom ends of the engine shell (302) respectively. The rotor (3052) extends out of the engine shell (302) and is connected to the annular propeller blade (301) to drive the annular propeller blade (301) to rotate.

5. The express delivery drone according to claim 4, characterized in that: The stator (3051), the rotor (3052), the air inlet cover (3053), and the air outlet cover (3054) are all hollow inside, and a plurality of air inlet holes communicating with the inside are provided on the surface of the air inlet cover (3053).

6. The express delivery drone according to claim 5, characterized in that: There are two protection rings (4), which are respectively located in front and rear of the top of the express delivery drone. The protection ring (4) comprises a connecting rod (401), and circular arc rings (402) are fixedly provided at both ends of the connecting rod (401). The circular arc rings (402) are cocentric with the annular propeller blades (301). Support legs (403) are fixedly provided on both sides of the lower side of the connecting rod (401), and the other ends of the support legs (403) are fixedly connected to the top of the express delivery drone.

7. The express delivery drone according to claim 6, characterized in that: The fuselage (1) comprises a cabin door (101), a power source for driving the cabin door (101) to close and open is fixedly provided on the fuselage (1), the cabin door (101) is hinged to the fuselage (1), a slide groove (102) is fixedly provided on the inner bottom surface of the fuselage (1), the slide groove (102) has two and is arranged in parallel, a pulley (103) is provided in the slide groove (102), and the pulley (103) is slidably connected to the slide groove (102).

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