UAV and catapult thereof

Abstract

The present invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle and a catapult thereof, comprising a flight mechanism, wherein the flight mechanism is provided with a catapult mechanism, the catapult mechanism is provided with a folding mechanism, a power mechanism is installed between the folding mechanism and the catapult mechanism, the power mechanism drives the catapult mechanism, a placement mechanism is rotatably provided on the folding mechanism, and a shielding mechanism is arranged on the placement mechanism; the arrangement of the flight mechanism facilitates folding and storing the wings of the unmanned aerial vehicle, facilitates the placement mechanism to transport the unmanned aerial vehicle, and reduces the space occupied by the unmanned aerial vehicle; the arrangement of the placement mechanism facilitates carrying the folding mechanism and the flight mechanism for movement, and facilitates holding the unfolded folding mechanism; the arrangement of the folding mechanism facilitates extending the flight track, so that the flight mechanism obtains sufficient acceleration; the arrangement of the shielding mechanism facilitates shielding and protection of the auxiliary parts of the flight mechanism, and improves the outdoor survival ability of the unmanned aerial vehicle and the launcher.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles (UAVs), in particular to an unmanned aerial vehicle (UAV) and a catapult thereof. Background Art

[0002] Unmanned aircraft, or "drones" for short, are unmanned aircraft that are controlled by radio remote control equipment and self-contained program control devices, or are operated completely or intermittently autonomously by onboard computers. Compared with manned aircraft, drones are often more suitable for tasks that are too "dull, dirty or dangerous". When drones are performing initial flights, they need to obtain a flyable speed, so they need to use an accelerated catapult when performing flight missions.

[0003] However, traditional fixed-wing UAVs take up a large space and are extremely inconvenient to transport. In addition, traditional ejection racks that perform ejection missions generally need to be placed on the ground for ejection missions, and the ejection components need to be separately hoisted to the ground for placement and deployment, which prolongs the flight preparation time. In addition, a flat ground needs to be selected to perform the launch mission, which strictly limits the flight conditions of the UAV. The UAV ejection rack is generally exposed to the outside during transportation. The UAV and the catapult are easily corroded by long-term exposure to the sun or wind and rain, and cannot provide protection for the UAV and the ejection components, thereby reducing the ability of the UAV to respond to emergencies. In addition, no shielding protective panels are provided on the existing ejection racks, which reduces the service life of the catapult. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a drone and a catapult thereof.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a catapult of a drone, the drone includes a flight mechanism, the flight mechanism includes a body, a support plate is provided on the body, a plurality of rollers are installed on the support plate, three tail wings are installed on the body, and two flying wings are rotatably arranged on the body, a second gear is arranged on the flying wing, two second gears are rotatably connected in the body and mesh with each other, a first telescopic rod and a second telescopic rod are rotatably arranged between the two second gears, the first telescopic rod and the second telescopic rod are slidably matched, a spring is abutted between the second telescopic rod and the first telescopic rod, and the spring drives the first telescopic rod and the second telescopic rod;

[0006] The ejector comprises an ejection mechanism, a folding mechanism, a power mechanism and a placement mechanism. The folding mechanism is arranged below the ejection mechanism. The power mechanism is installed between the folding mechanism and the ejection mechanism. The power mechanism is used to drive the ejection mechanism. The folding mechanism is rotatably connected with the placement mechanism. The placement mechanism is provided with a shielding mechanism.

[0007] Preferably, the placement mechanism comprises a vehicle body, a bracket is provided on the vehicle body, a placement plate is mounted on the vehicle body, the placement plate is rotated on the vehicle body, and a fixing frame is fixed on the placement plate.

[0008] Preferably, the folding mechanism includes a first track, the first track is rotatably connected to a fixed frame, the first track is rotatably connected to a second track, the second track is rotatably connected to the first track via a first rotating shaft, a hydraulic telescopic rod is provided between the first track and the second track, and the hydraulic telescopic rod is rotatably connected to both the first track and the second track.

[0009] Preferably, the power mechanism includes a reciprocating wheel, a reciprocating wheel rotates between the first track and the second track respectively, a connecting belt is wound between the two reciprocating wheels, a protective ring is installed on the reciprocating wheel, and the connecting belt assembles the two reciprocating wheels together.

[0010] Preferably, a high-speed motor is installed on the first track, and first gears are fixed to the high-speed motor and the reciprocating wheel respectively, a chain is meshed between the two first gears, and the high-speed motor drives the reciprocating wheel through the chain.

[0011] Preferably, the ejection mechanism includes a fixed block, a plurality of fixed blocks are installed on the connecting belt, a bow-shaped frame is connected between the plurality of fixed blocks, a moving seat is placed on the bow-shaped frame, a protrusion is provided between the moving seat and the bow-shaped frame, the protrusion is engaged with the moving seat, the protrusion assembles the moving seat and the bow-shaped frame together, the roller contacts the moving seat, and a plurality of balls roll between the moving seat and the first track.

[0012] Preferably, the shielding mechanism includes a guide rail, the vehicle body is provided with the guide rail, a plurality of first sliders and second sliders are slidably fitted inside the guide rail, a connecting rod is rotatably provided between the first slider and the second slider, and the connecting rod fits the first slider and the second slider together.

[0013] Preferably, a third rotating shaft and a screw rod are provided on the guide rail, the third rotating shaft and the screw rod are fixedly connected, the screw rod is threadedly connected to the second slider, a drive motor is installed on the guide rail, the drive motor is fixed to the screw rod, and the drive motor drives the second slider via the screw rod.

[0014] Preferably, a support rod is installed between the first slider and the second slider, and a folding skin is arranged between the support rods.

[0015] The beneficial effects of the present invention are:

[0016] (1) The drone and its catapult described in the present invention can be easily folded and stored by the arrangement of the flight mechanism, so that the drone can be easily transported by the placement mechanism, the space occupied by the drone can be reduced, and the drone can be protected from sudden weather conditions encountered when launching the drone. That is, when the drone needs to be launched for flight, the vehicle body must first be started, and the drone is transferred to an open area for flight through the vehicle body. The drive motor is started to drive the multiple support rods to be stored and folded to expose the drone body, and the flying wings are operated to make the two second gears mesh with each other and rotate. The arrangement of the two second gears allows the two flying wings to be synchronously deflected to the outside of the drone body. The foldable flying wings reduce the space occupied by the drone and facilitate the transfer of the drone by the vehicle body. The second gears drive the two first telescopic rods and the second telescopic rods to slide and cooperate. When the flying wings rotate to the flight position, the spring contacts the first telescopic rod and the second telescopic rod, so that the two second gears maintain the deflected position, and the two flying wings are driven to the unfolded position, so that the flying wings can be used to obtain the lift required for flight. The drone body is placed on the moving seat through the multiple rollers, so that it can be quickly separated from the moving seat for flight during ejection.

[0017] (2) The unmanned aerial vehicle and its catapult described in the present invention have a folding mechanism with a placement mechanism that is rotatable, and a shielding mechanism is placed on the placement mechanism. The placement mechanism is convenient for carrying the folding mechanism and the flight mechanism for movement, and is convenient for supporting the unfolded folding mechanism. The folding mechanism is convenient for extending the flight track, so that the flight mechanism obtains sufficient acceleration and ensures the ejection effect. That is, when the unmanned aerial vehicle and its auxiliary equipment need to be carried and moved, they can be transferred by driving the vehicle body, and the placement plate is rotatably connected to the vehicle body, so that the first track and the second track are deflected to adjust the ejection angle. The first track and the second track are rotatably connected by the first rotating shaft, and the first track and the second track are folded by the hydraulic telescopic rod, so that it is convenient to retract and release while extending the ejection track, further improving the space utilization rate of the auxiliary flight components. After unfolding, the second track can be placed on the bracket on the vehicle body, so that the load of the second track after unfolding can be reduced, and the use effect of the first track and the second track is ensured.

[0018] (3) The unmanned aerial vehicle and its catapult described in the present invention have a catapult mechanism on the body, a folding mechanism on the catapult mechanism, and a power mechanism installed between the folding mechanism and the catapult mechanism. The power mechanism facilitates the catapult mechanism to obtain a fast moving speed, that is, when it is necessary to drive the moving seat to carry the unmanned aerial vehicle quickly, the moving seat is first placed on the two protrusions so that the protrusions can carry the moving seat to move quickly. A plurality of balls are connected in a rolling manner between the moving seat and the first track and the second track, thereby facilitating the reduction of the friction between the moving seat and the first track and the second track, thereby reducing the power loss during movement. The high-speed motor is started, and the high-speed motor drives the reciprocating wheel to rotate through a chain. A connecting belt is wound between the two reciprocating wheels, and the connecting belt drives the protrusion to move through a fixed block and a bow frame. The protrusion is detachably connected to the moving seat, thereby facilitating the fast sliding of the engaging moving seat. After moving to the end of the second track, the protrusion is separated from the moving seat and is driven by the connecting belt to the inside of the first track to prepare for the next engagement of the moving seat.

[0019] (4) The UAV and its catapult described in the present invention have a shielding mechanism installed on the mounting mechanism. The shielding mechanism is arranged to facilitate shielding and protecting the auxiliary parts of the flight mechanism from wind and sun. That is, when it is necessary to protect the UAV and the ejection parts, first start the driving motor inside the two guide rails. The driving motor drives the screw to rotate. The screw and the second slider are threadedly connected. Then the screw drives the second slider to move along the guide rail. The first slider and the second slider are linked by a connecting rod, so that it is convenient to drive multiple first sliders to move synchronously and evenly onto the guide rail to achieve a variable pitch effect. The first slider and the second slider drive the U-shaped support rod to move. The support rod supports the folding skin, so that the UAV and the ejection parts can be shielded during the transfer and transportation process, thereby preventing the idle UAV from being exposed to wind and rain and improving the maintenance effect of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0022] Figure 2 for Figure 1 A schematic structural diagram of the shielding mechanism shown;

[0023] Figure 3 for Figure 1 The structural diagram of the flight mechanism shown;

[0024] Figure 4 for Figure 1 A schematic diagram of the connection structure of the folding mechanism and the ejection mechanism shown;

[0025] Figure 5for Figure 1 A schematic diagram of the enlarged structure of part A shown;

[0026] Figure 6 for Figure 1 The enlarged structural diagram of part B is shown;

[0027] Figure 7 for Figure 1 The enlarged structural diagram of the C part is shown;

[0028] Figure 8 for Figure 3 The enlarged structural diagram of the D part shown;

[0029] Fig. 9 for Figure 4 The enlarged structural diagram of part E is shown.

[0030] In the figure: 1, placement mechanism, 11, vehicle body, 12, placement plate, 13, fixing frame, 14, bracket, 2, folding mechanism, 21, first track, 22, second track, 23, first rotating shaft, 24, hydraulic telescopic rod, 3, power mechanism, 31, reciprocating wheel, 32, second rotating shaft, 33, high-speed motor, 34, first gear, 35, chain, 36, connecting belt, 37, protective ring, 4, ejection mechanism, 41, fixing block, 42, bow frame, 43 , bump, 44, moving seat, 45, ball, 5, flying mechanism, 51, fuselage, 52, tail wing, 53, support plate, 54, roller, 55, flying wing, 56, second gear, 57, first telescopic rod, 58, second telescopic rod, 59, spring, 6, shielding mechanism, 61, guide rail, 62, first slider, 63, connecting rod, 64, third rotating shaft, 65, screw, 66, second slider, 67, driving motor, 68, support rod, 69, folding skin. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] like Figure 1-Figure 9As shown, a drone and its catapult according to the present invention include a flight mechanism 5, wherein the flight mechanism 5 includes a body 51, a support plate 53 is provided on the body 51, a plurality of rollers 54 are installed on the support plate 53, three tail wings 52 are installed on the body 51, and two flying wings 55 are rotatably arranged on the body 51, a second gear 56 is arranged on the flying wing 55, two second gears 56 are rotatably connected in the body 51 and mesh with each other, and a first telescopic rod 57 and a second telescopic rod 52 are rotatably arranged between the two second gears 56 58, the first telescopic rod 57 and the second telescopic rod 58 are slidably matched, and a spring 59 is abutted between the second telescopic rod 58 and the first telescopic rod 57, and the spring 59 drives the first telescopic rod 57 and the second telescopic rod 58; through the setting of the flight mechanism 5, it is convenient to fold and store the wings of the drone, which is convenient for the placement mechanism 1 to transport it and reduce the space occupied by the drone, that is: when the body 51 needs to be ejected and fly, the body 11 needs to be started first, and the body 51 needs to be transferred to an open area through the body 11 for flight , start the driving motor 67, drive the multiple support rods 68 to be stored and folded, expose the body 11, operate the flying wing 55, make the two second gears 56 mesh with each other and rotate, the setting of the two second gears 56 makes the two flying wings 55 synchronously deflect to the outside of the body 51, the foldable flying wing 55 setting reduces the space occupied by the drone, and facilitates the transfer of the vehicle body 11, the second gear 56 during deflection drives the two first telescopic rods 57 and the second telescopic rod 58 to slide and cooperate, when the flying wing 55 rotates to the flight position, the spring 59 resists the first telescopic rod 57 and the second telescopic rod 58, so that the two second gears 56 maintain the deflected position, because the spring 59 is in a compressed state at the beginning, when the first telescopic rod 57 and the second telescopic rod 58 rotate with the second gear 56, when the first telescopic rod 57 and the second telescopic rod 58 rotate to the axis connection line with the second gear 56, the spring 59 changes from a compressed state to a stretched state, at this time the second gear 56 rotates at an angle of 90°, which is the rotation angle of the flying wing 55. Then, as the second gear 56 further rotates to a smaller angle, the first telescopic rod 57 and the second telescopic rod 58, the spring 59 in the stretched state has a pulling force to contract inward, and the two ends of the spring 59 will pull the first telescopic rod 57 and the second telescopic rod 58. At this time, the first telescopic rod 57 and the second telescopic rod 58 are affected by the pulling force of the spring 59, thereby achieving the effect of fixing the flying wing 55 after it is rotated to the flight position; the two flying wings 55 are driven to the deployed position, thereby facilitating the use of the flying wings 55 to obtain the lift required for flight, and the body 51 is placed on the moving seat 44 through a plurality of rollers 54, thereby facilitating rapid separation from the moving seat 44 for flight during ejection.

[0033] Specifically, the ejection device includes an ejection mechanism 4, a folding mechanism 2, a power mechanism 3 and a placement mechanism 1. The folding mechanism 2 is arranged below the ejection mechanism 4. The power mechanism 3 is installed between the folding mechanism 2 and the ejection mechanism 4. The power mechanism 3 is used to drive the ejection mechanism 4. The folding mechanism 2 is rotatably connected to the placement mechanism 1. The placement mechanism 1 is provided with a shielding mechanism 6.

[0034] Specifically, the placement mechanism 1 includes a vehicle body 11 , a bracket 14 is provided on the vehicle body 11 , and a placement plate 12 is installed on the vehicle body 11 , the placement plate 12 is rotated on the vehicle body 11 , and a fixing frame 13 is fixed on the placement plate 12 .

[0035] Specifically, the folding mechanism 2 includes a first track 21, the first track 21 is rotatably connected to the fixing frame 13, the first track 21 is rotatably connected to the second track 22, the second track 22 and the first track 21 are rotatably connected via a first rotating shaft 23, a hydraulic telescopic rod 24 is provided between the first track 21 and the second track 22, the hydraulic telescopic rod 24 is rotatably connected to both the first track 21 and the second track 22; the folding mechanism 2 is rotatably connected to the placement mechanism 1, the placement mechanism 1 is provided with a shielding mechanism 6, the placement mechanism 1 is provided with the convenience of carrying the folding mechanism 6 and the flying mechanism 5 to move, and the unfolded folding mechanism 6 is conveniently held, the folding mechanism 6 is provided with the convenience of extending the flying track, so that the flying mechanism 5 obtains sufficient acceleration, and ensures The ejection effect, that is, when the UAV and its accessories need to be moved, they can be transferred by driving the vehicle body 11, and the placement plate 12 is rotatably connected to the vehicle body 11, so as to facilitate the deflection of the first track 21 and the second track 22 to adjust the ejection angle. The first track 21 and the second track 22 are rotatably connected by the first rotating shaft 23, and the first track 21 and the second track 22 are folded by the hydraulic telescopic rod 58, so as to facilitate the folding while extending the ejection track, further improving the space utilization rate of the auxiliary flight components. After unfolding, the second track 22 can be placed on the bracket 14 on the vehicle body 11, so as to reduce the load of the second track 22 after unfolding, and ensure the use effect of the first track 21 and the second track 22.

[0036] Specifically, the power mechanism 3 includes a reciprocating wheel 31, and a reciprocating wheel 31 rotates between the first track 21 and the second track 22 respectively. A connecting belt 36 is wound between the two reciprocating wheels 31, and a protective ring 37 is installed on the reciprocating wheel 31. The connecting belt 36 assembles the two reciprocating wheels 31 together.

[0037] Specifically, a high-speed motor 33 is installed on the first track 21 , and first gears 34 are fixed to the high-speed motor 33 and the reciprocating wheel 31 respectively. A chain 35 is meshed between the two first gears 34 , and the high-speed motor 33 drives the reciprocating wheel 31 through the chain 35 .

[0038] Specifically, the ejection mechanism 4 includes a fixed block 41, a plurality of fixed blocks 41 are installed on the connecting belt 36, a bow frame 42 is connected between the plurality of fixed blocks 41, a moving seat 44 is arranged on the bow frame 42, a convex block 43 is arranged between the moving seat 44 and the bow frame 42, the convex block 43 is snapped onto the moving seat 44, the convex block 43 assembles the moving seat 44 and the bow frame 42 together, the roller 54 contacts the moving seat 44, a plurality of balls 45 roll between the moving seat 44 and the first track 21; the ejection mechanism 4 is provided on the body 51, the folding mechanism 2 is provided on the ejection mechanism 4, the power mechanism 3 is installed between the folding mechanism 2 and the ejection mechanism 4, and the power mechanism 3 is used to facilitate the ejection mechanism 4 to obtain a fast moving speed, that is, when it is necessary to drive the moving seat 44 to carry the drone quickly, firstly, the moving seat 44 is arranged on the two convex blocks 43 so that the convex blocks 43 can move the moving seat 44 to the moving seat 44. The block 43 can carry the moving seat 44 to move quickly. A plurality of the balls 45 are rollingly connected between the moving seat 44 and the first track 21 and the second track 22, so as to reduce the friction between the moving seat 44 and the first track 21 and the second track 22, and reduce the power loss during movement. The high-speed motor 33 is started, and the high-speed motor 33 drives the reciprocating wheel 31 to rotate through the chain 35. The connecting belt 36 is wound between the two reciprocating wheels 31, and the connecting belt 36 drives the protrusion 43 to move through the fixed block 41 and the bow frame 42. The protrusion 43 is detachably connected to the moving seat 44, so as to facilitate the fast sliding of the moving seat 44. After moving to the end of the second track 22, the protrusion 43 is separated from the moving seat 44, and is driven to the inside of the first track 21 by the connecting belt 36, so as to prepare for the next engagement of the moving seat 44.

[0039] Specifically, the shielding mechanism 6 includes a guide rail 61, and the guide rail 61 is arranged on the vehicle body 11. The guide rail 61 is internally slidably matched with a plurality of first sliders 62 and second sliders 66. A connecting rod 63 rotates between the first slider 62 and the second slider 66, and the connecting rod 63 matches the first slider 62 and the second slider 66 together.

[0040] Specifically, a third rotating shaft 64 and a lead screw 65 are provided on the guide rail 61. The third rotating shaft 64 and the lead screw 65 are fixedly connected. The lead screw 65 is threadedly connected to the second slider 66. A driving motor 67 is installed on the guide rail 61. The driving motor 67 is fixed to the lead screw 65. The driving motor 67 drives the second slider 66 through the lead screw 65.

[0041] Specifically, a support rod 68 is installed between the first slider 62 and the second slider 66. A folding leather 69 is arranged between the support rods 68. A shielding mechanism 6 is arranged on the placement mechanism 1. Through the arrangement of the shielding mechanism 6, it is convenient to shield and protect the machine accessory parts of the flight mechanism 5, avoiding wind and sun exposure. That is, when it is necessary to protect the drone and the ejection component, first start the driving motors 67 inside the two guide rails 61. The driving motors 67 drive the lead screws 65 to rotate. The lead screws 65 are threadedly connected to the second sliders 66. Then the lead screws 65 drive the second sliders 66 to move along the guide rails 61. The first slider 62 and the second slider 66 are linked through the connecting rod 63, so as to conveniently drive a plurality of the first sliders 62 to move synchronously and evenly onto the guide rails 61 to achieve the variable pitch function. The first slider 62 and the second slider 66 drive the support rod 68 in a U shape to move. The support rod 68 supports the folding leather 69, so that the drone and the ejection component can be shielded, avoiding the idle drone from being exposed to wind and rain, and improving the maintenance effect of the components.

[0042] When the present invention is in use, when the body 51 needs to be ejected for flight, the vehicle body 11 needs to be started first, and the body 51 needs to be transferred to an open area for flight through the vehicle body 11, and the driving motor 67 needs to be started to drive the multiple support rods 68 to be stored and folded to expose the body 11, and the flying wing 55 needs to be operated to make the two second gears 56 mesh with each other and rotate. The setting of the two second gears 56 allows the two flying wings 55 to be synchronously deflected to the outside of the body 51. The setting of the foldable flying wing 55 reduces the space occupied by the UAV and facilitates the transfer of the UAV by the vehicle body 11. The second gear 56 during deflection drives the two first telescopic rods 57 and the second telescopic rod 58 to slide and cooperate. When the flying wing 55 rotates to the flight position, the two second gears 56 drive the two first telescopic rods 57 and the second telescopic rods 58 to slide and cooperate. When the first telescopic rod 57 and the second telescopic rod 58 are placed, the spring 59 pulls the first telescopic rod 57 and the second telescopic rod 58 to keep the two second gears 56 in the deflected position, and the two flying wings 55 are driven to the deployed position, so as to facilitate the use of the flying wings 55 to obtain the lift required for flight. The body 51 is placed on the moving seat 44 through a plurality of rollers 54, so as to facilitate the rapid separation from the moving seat 44 for flight during ejection. When the UAV and its ancillary equipment need to be carried and moved, they can be transferred by driving the vehicle body 11, and the placement plate 12 is rotatably connected to the vehicle body 11, so as to facilitate the deflection of the first track 21 and the second track 22 to adjust the ejection angle. The first track 21 and the second track 22 are rotatably connected through the first rotating shaft 23. The first track 21 and the second track 22 are folded by the hydraulic telescopic rod 58, so that it is convenient to retract and unfold while extending the ejection track, further improving the space utilization rate of the auxiliary flight components. The second track 22 can be placed on the bracket 14 on the vehicle body 11 after being unfolded, thereby reducing the load of the second track 22 after being unfolded, and ensuring the use effect of the first track 21 and the second track 22; when it is necessary to drive the moving seat 44 to quickly carry the drone to move, the moving seat 44 is first placed on the two protrusions 43, so that the protrusions 43 can carry the moving seat 44 to move quickly, and the moving seat 44 and the first track 21 and the second track 22 are rollingly connected. A plurality of balls 45 are provided to reduce the friction between the moving seat 44 and the first track 21 and the second track 22, thereby reducing the power loss during movement. The high-speed motor 33 is started, and the high-speed motor 33 drives the reciprocating wheel 31 to rotate through the chain 35. The connecting belt 36 is wound between the two reciprocating wheels 31. The connecting belt 36 drives the protrusion 43 to move through the fixed block 41 and the bow frame 42. The protrusion 43 is detachably connected to the moving seat 44, thereby facilitating the fast sliding of the engaging moving seat 44. After moving to the end of the second track 22, the protrusion 43 is separated from the moving seat 44 and is driven by the connecting belt 36 to the inside of the first track 21, so as to prepare for the next engaging moving seat 44.When it is necessary to protect the UAV and the ejection component, the drive motor 67 inside the two guide rails 61 is first started, and the drive motor 67 drives the screw rod 65 to rotate. The screw rod 65 and the second slider 66 are threadedly connected, and the screw rod 65 drives the second slider 66 to move along the guide rail 61. The first slider 62 and the second slider 66 are linked by the connecting rod 63, so that it is convenient to drive multiple first sliders 62 to move synchronously and evenly to the guide rail 61 to achieve the variable pitch effect. The first slider 62 and the second slider 66 drive the support rod 68 in the shape of a U to move, and the support rod 68 supports the folding skin 69, so that the UAV and the ejection component can be shielded. ;

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A catapult for an unmanned aerial vehicle, the unmanned aerial vehicle comprising a flight mechanism (5), the flight mechanism (5) comprising a body (51), a support plate (53) being arranged on the body (51), a plurality of rollers (54) being mounted on the support plate (53), three tail wings (52) being mounted on the body (51), two flying wings (55) being rotatable on the body (51), a second gear (56) being arranged on the flying wings (55), two second gears (56) being rotatably connected in the body (51) and meshing with each other, a first telescopic rod (57) and a second telescopic rod (58) being rotatably arranged between the two second gears (56), the first telescopic rod (57) and the second telescopic rod (58) being slidably matched, a spring (59) being abutted against the second telescopic rod (58) and the first telescopic rod (57), the spring (59) driving the first telescopic rod (57) and the second telescopic rod (58); Features: The ejector comprises an ejection mechanism (4), a folding mechanism (2), a power mechanism (3) and a placement mechanism (1); the folding mechanism (2) is arranged below the ejection mechanism (4); the power mechanism (3) is installed between the folding mechanism (2) and the ejection mechanism (4); the power mechanism (3) is used to drive the ejection mechanism (4); the folding mechanism (2) is rotatably connected to the placement mechanism (1); and a shielding mechanism (6) is arranged on the placement mechanism (1).

2. The catapult of a drone according to claim 1, characterized in that: The placement mechanism (1) comprises a vehicle body (11), a bracket (14) is provided on the vehicle body (11), a placement plate (12) is mounted on the vehicle body (11), the placement plate (12) is rotated on the vehicle body (11), and a fixing frame (13) is fixed on the placement plate (12).

3. The catapult of a drone according to claim 2, characterized in that: The folding mechanism (2) comprises a first track (21), the first track (21) being rotatably connected to a fixing frame (13), the first track (21) being rotatably connected to a second track (22), the second track (22) being rotatably connected to the first track (21) via a first rotating shaft (23), a hydraulic telescopic rod (24) being arranged between the first track (21) and the second track (22), the hydraulic telescopic rod (24) being rotatably connected to both the first track (21) and the second track (22).

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