CN107117311A - A kind of changeable wheelbase unmanned plane - Google Patents

Abstract

The invention provides a variable wheelbase unmanned aerial vehicle, which includes a body, several propellers, several wings, and a transmission assembly. The number of rods and slide rails is the same as the number of propellers; the motor is fixed on the body; the shaft includes an input shaft and an output shaft with the same number as the propellers, and the input shaft is connected to the motor rotation shaft; the proximal end of each crank is connected to the output shaft corresponding to the shaft The shaft is fixedly connected; the proximal end of each connecting rod is rotationally connected with the distal end of the corresponding crank and the connecting rod rotates in the horizontal direction along the rotation axis; the proximal end of each slide rail is fixedly connected with the corresponding connecting rod and the distal end is fixedly connected with the wing , each slide rail is slidably connected with the linear track provided on the body. When the UAV reduces the wheelbase during flight and increases its flight speed, the UAV increases the wheelbase during hovering to increase its wind resistance and flight stability.

Description

A variable wheelbase UAV

technical field

The invention relates to an unmanned aerial vehicle technology, in particular to an unmanned aerial vehicle with variable wheelbase.

Background technique

Multi-rotor drones have the characteristics of zero casualties, few restrictions on use, good concealment, and high cost-effectiveness. Their status and role in modern fire rescue are becoming increasingly prominent. The number, type and frequency of multi-rotor UAVs used for fire fighting are showing a rapid growth trend. Therefore, vigorously developing unmanned aerial vehicle-carrying fire-fighting technology has become the direction of competing research in various countries. In recent years, countries have issued their own drone development plans and increased investment, and the development of drones has shown an unprecedented upsurge.

Traditional drones mainly carry fire extinguishing bombs by hanging. Therefore, the volume of the UAV must be increased to meet the demand for bombs, which in turn increases the take-off weight and reduces flexibility. This makes it a need to develop a light-weight, low-cost, and fast fire-fighting drone.

Contents of the invention

The object of the present invention is to provide a variable wheelbase drone, which can change the flight resistance of the drone by changing the wheelbase of the drone.

An unmanned aerial vehicle with a variable wheelbase, including a body, several propellers, several wings, and a transmission assembly, the propellers are arranged on the wings, and the transmission assembly includes a motor, a shaft, a crank, a connecting rod, and a slide rail; wherein the motor is fixed on the body The shaft includes an input shaft and an output shaft with the same number as the propeller, and the input shaft is connected with the rotating shaft of the motor; the number of cranks is the same as the number of propellers, and the proximal end of each crank is fixedly connected with the output shaft corresponding to the shaft; The number is the same as the number of propellers, the proximal end of each connecting rod is rotationally connected with the corresponding crank distal end and the connecting rod rotates in the horizontal direction along the rotation axis; the number of slide rails is the same as the number of propellers, and the proximal end of each slide rail is connected The connecting rod is fixedly connected and the far end is fixedly connected with the wing, and each slide rail is slidably connected with the linear track arranged on the body.

Using the above-mentioned unmanned aerial vehicle, a launch assembly is set on the unmanned aerial vehicle, and the launch assembly includes a launch tube (10), a first connector, and a sleeve; wherein the launch tube is fixed in the sleeve, and the sleeve is fixed on the first connector , the first connecting piece is fixed on the body.

Using the above-mentioned unmanned aerial vehicle, the unmanned aerial vehicle is provided with a launch assembly, and the launch assembly includes several launch tubes, first connectors, several sleeves, and second connectors; wherein each launch tube is fixed in a corresponding sleeve, and the first One sleeve is fixed on the first connecting piece, the other sleeves are fixedly connected with the first sleeve through the second connecting piece, and the first connecting piece is fixed on the machine body

Compared with the prior art, the present invention has the following significant advantages:

(1) The UAV adopts a variable wheelbase mechanism, which drives the extension and shortening of the four-wing arm through the motor, so that the UAV reduces the wheelbase during flight and increases its flight speed; the UAV is hovering Increased wheelbase increases its wind resistance and flight stability.

(2) During the entire process of changing the wheelbase of the UAV, only one motor is used to provide power, which greatly reduces the take-off weight of the UAV and makes the fuselage structure more compact.

(3) The UAV adopts a convenient way of carrying and hanging fire extinguishing bombs horizontally to improve the stability of the flight control when the UAV is launched.

The present invention will be further described below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a three-dimensional outline diagram of a variable wheelbase mechanism of an unmanned aerial vehicle according to the present invention.

Fig. 2 is a top view of a UAV variable wheelbase mechanism transmission assembly according to the present invention.

Fig. 3 is a partial view of a launch assembly of a UAV variable wheelbase mechanism according to the present invention.

Fig. 4 is an expanded three-dimensional outline view of a UAV variable wheelbase mechanism transmission assembly according to the present invention.

Fig. 5 is a closed three-dimensional outline view of a UAV variable wheelbase mechanism transmission assembly according to the present invention.

detailed description

Referring to Fig. 1 and Fig. 2, a UAV variable wheelbase mechanism mainly includes: a wing assembly 1, a body 2, a launch assembly 3 and a transmission assembly 11. The transmission assembly 11 includes a connecting rod 4 , a crank 5 , a shaft 6 , a motor 12 and a slide rail 13 . The motor 12 is fixed on the body 2 by bolts, the shaft 6 is fixedly connected with the output shaft of the motor 12 through a coupling, the crank 5 is fixedly connected with the shaft 6, and the outer circle of the crank 5 is evenly distributed with four sets of connecting bosses, and four connecting rods 4 They are respectively connected with the four groups of connecting bosses through pin shafts, and the two can be relatively rotated. The proximal end of each sliding rail 13 is fixedly connected to the corresponding connecting rod 4 and the distal end is fixedly connected to the wing 1 , and each sliding rail 13 is slidingly connected to the linear track provided on the body 2 . When the motor 12 drives the shaft 6 to rotate, the crank 5 drives the connecting rod 4 to perform telescopic movement relative to the body 2, thereby changing the wheelbase of the drone.

3, the launch assembly 3 includes a launch tube 10, a first connector 7, and a sleeve 8; wherein the launch tube 10 is fixed in the sleeve 8, the sleeve 8 is fixed on the first connector 7, and the first connector 7 fixed on the body 2. The launch assembly 3 can also be provided with a plurality of launch tubes 10, each launch tube is fixed in the corresponding sleeve 8, the first sleeve 8 is fixed on the first connecting piece 7, and the remaining sleeves 8 pass through the second connecting piece 9 It is fixedly connected with the first sleeve 8. Two groups of emitting assemblies 3 are arranged and distributed symmetrically about the centerline of the body 2 . The launch assembly 3 is hung horizontally.

4 and 5, when the UAV is ready to take off, the motor 12 rotates clockwise to drive the shaft 6 to rotate, and the crank 5 drives the connecting rod 4 to make an elongation movement relative to the body 2. The wheelbase of the UAV becomes larger, and the takeoff process is stable; During the flight of the UAV, the motor 12 rotates counterclockwise to drive the shaft 6 to rotate, and the crank 5 drives the connecting rod 4 to retract relative to the body 2. The wheelbase of the UAV becomes smaller and the flight speed is faster; the UAV reaches the destination When hovering to launch the fire extinguishing bomb, the motor 12 rotates clockwise to drive the shaft 6 to rotate, and the crank 5 drives the connecting rod 4 to make an elongation movement relative to the body 2. The wheelbase of the UAV becomes larger, and the fire extinguishing bomb is launched stably; During the return process of the bomb, the crank 5 drives the connecting rod 4 to retract relative to the body 2, the wheelbase of the UAV becomes smaller, and the flight speed increases; when the UAV is ready to land after launching the fire extinguishing bomb, the motor 12 rotates clockwise The shaft 6 is driven to rotate, and the crank 5 drives the connecting rod 4 to perform an elongation movement relative to the body 2, so that the wheelbase of the UAV becomes larger and the landing process is stable.

Claims (6)

1. a kind of changeable wheelbase unmanned plane, including body (2), some propellers, some wings (1), wing set spiral on (1) Oar, it is characterised in that also including transmission component (11), transmission component (11) includes motor (12), axle (6), crank (5), connecting rod (4), slide rail (13)；Wherein

Motor (12) is fixed on body (2)；

Axle (6) include an input shaft and with propeller (1) quantity identical output shaft,

Input shaft is connected with motor (12) rotary shaft；

The quantity that crank (5) is set is identical with propeller (1) quantity,

Each crank (5) near-end output shaft corresponding with axle (6) is fixedly connected；

The quantity that connecting rod (4) is set is identical with propeller (1) quantity,

The near-end of each connecting rod (4) rotates connection with corresponding crank (5) distal end and connecting rod (4) turns in the horizontal direction along rotary shaft It is dynamic；

The quantity that slide rail (13) is set is identical with propeller (1) quantity,

The near-end of each slide rail (13) is fixedly connected with respective link (4) and distal end is fixedly connected with wing (1),

Each slide rail (13) is slidably connected with the rectilinear orbit set on body (2).

2. unmanned plane according to claim 1, it is characterised in that crank (5), connecting rod (4), slide rail (13) are coplanar.

3. unmanned plane according to claim 1 or 2, it is characterised in that wing (1) sets four, and adjacent wing (1) prolongs The angle of long line is 90 °.

4. unmanned plane according to claim 1, it is characterised in that emitting module (3), the transmitting group are set on the unmanned plane Part (3) includes launching tube (10), the first connector (7), sleeve (8)；Wherein

Launching tube (10) is fixed in sleeve (8),

Sleeve (8) is fixed on the first connector (7),

First connector (7) is fixed on body (2).

5. unmanned plane according to claim 1, it is characterised in that emitting module (3), the transmitting group are set on the unmanned plane Part (3) includes some launching tubes (10), the first connector (7), some sleeves (8), the second connector (9)；Wherein

Each launching tube is fixed in corresponding sleeve (8),

First sleeve (8) is fixed on the first connector (7), and remaining sleeve (8) passes through the second connector (9) and first set Cylinder (8) is fixedly connected,

First connector (7) is fixed on body (2).

6. the unmanned plane according to claim 4 or 5, it is characterised in that emitting module (3) sets two groups and on body (2) center line is symmetrical.