A cargo drone and cargo door device

Abstract

The present invention discloses a cargo drone and a cargo door device, which belong to the field of cargo drone door design. The cargo drone door is provided with a door locking device and a gust locking device, wherein the door locking device is realized by arranging structures such as a handle, an active rod and a driven rod on the door, and the gust locking device is realized by arranging structures such as a strut support, a strut assembly and a limiting hole on the door. The door locking device and the gust locking device have the characteristics of simple structure and high locking reliability. The arrangement of the door locking device makes the door locking and opening process easier and more labor-saving. The arrangement of the gust locking device enables the door to be quickly positioned at different opening angles, which can meet different loading and unloading requirements and has important practical application significance.

Description

Technical Field

[0001] The present invention belongs to the field of cargo drone design, and in particular relates to a cargo drone and a cargo door device. Background Art

[0002] Although large-scale cargo drones are currently in the research and development and trial-production stage in China, they are a hot direction in the civilian field of drones. From small multi-axis drones to point-to-point fixed-wing drones, to large-scale cargo drones, drone design technology is becoming more and more mature.

[0003] As cargo drones become larger, their cargo capacity has been improved, and the use of more complete cargo loading and unloading systems has become a common requirement. As the size of cargo loading and unloading systems, cargo containers and cargo loads increases, higher requirements are also placed on the opening and locking structure of cargo doors.

[0004] In logistics and other application scenarios, the cabins of aircraft such as drones are usually provided with openings. The openings are used to inspect internal equipment or load and unload cargo. Currently, the hatch locking devices and gust lock devices installed at the openings of large aircraft are usually complex in design and structure, difficult to operate, and have a low degree of automation. To this end, a cargo door device for a cargo drone with a simpler and more reliable structure and more convenient operation is designed, especially for large cargo drones. The cargo door device can be quickly opened and locked by a single person, and at the same time has an easy-to-adjust opening angle, a simplified and reliable structure, and a gust lock device for the drone cargo door. This has important practical significance. Summary of the Invention

[0005] In response to the above problems, the present invention discloses a cargo drone and a cargo door device. The technical solution adopted by the present invention is:

[0006] A cargo door device for a cargo drone, comprising a main cargo door, a door frame, and a door hinge, wherein the main cargo door is connected to an upper side frame of the door frame via the door hinge, and wherein the cargo door device is further provided with a door locking device and a gust locking device;

[0007] The door locking device comprises: a handle, an active rod, a driven rod, and a side longitudinal frame of the door reinforcement frame, the handle being connected to the active rod, a rocker arm being provided at a perpendicular intersection of the active rod and the driven rod, the ends of driven rod connecting rods on both sides of the driven rod being positioned through limiting holes on the side longitudinal frame, and the handle being rotated to enable the ends of the driven rod connecting rods to extend and retract in the limiting holes via the active rod;

[0008] The main part of the gust locking device is symmetrically arranged on the side longitudinal frames on both sides of the main cargo door, and the gust locking device includes: a strut support, a strut assembly and a support hole. The strut support is connected to the side longitudinal frame, and the strut assembly is connected to the strut support. After connection, the strut can swing laterally and longitudinally relative to the direction of the side longitudinal frame with the strut support as the origin; the strut head can clamp the support hole to achieve support.

[0009] Furthermore, the active rod includes a handle shaft, a connecting piece and an active rod link; the driven rod includes: a single-ear joint, a double-ear joint, a driven rod link and a latch; the cabin door reinforcement frame is a frame structure surrounding the cabin door, and the side longitudinal skeleton is provided with a limiting hole; the connecting piece is composed of a cross joint with universal joints connected at both ends; the handle is connected to the handle shaft by a bolt, and the handle shaft is connected to the active rod link through the connecting piece, and a rocker arm is provided at the connection between the active rod and the driven rod, and the rocker arm is connected to the active rod link through the connecting piece, and the rocker arm is connected to the driven rod link through the single-ear joint, and the driven rod link is connected to the latch through the double-ear joint, and the latch is positioned through the limiting hole.

[0010] Furthermore, the strut support is connected to the side longitudinal frame of the main cargo door frame, and the strut assembly includes a strut joint, a strut and a strut head, the strut joint and the strut head are respectively located at the two ends of the strut, and the support holes are spaced apart on the two side frames of the door frame; the strut joint is movably connected to the strut support, and the strut after connection can swing laterally and longitudinally relative to the direction of the side longitudinal frame with the strut support as the origin; the strut head can clamp the support hole to achieve support.

[0011] Furthermore, a compression spring structure is provided at the position of the handle, and the compression spring structure includes a spring and a fixed bracket. The two fixed brackets are respectively connected and fixed to the driven rod connecting rods on both sides of the rocker arm, and the spring is connected between the two fixed brackets. When the handle is rotated and the cabin door is opened, as the driven rod connecting rod contracts, the spring is in a compressed state. When the handle is rotated in the opposite direction to close the cabin door, as the driven rod connecting rod extends, the spring is still in a compressed state. The elastic force of the spring can help lock the cabin door.

[0012] Furthermore, the support holes are latch holes located at both side edges of the hatch outer frame for closing the main cargo door.

[0013] Furthermore, a hook is provided at the position of the support rod head, and when the hatch is opened, the support rod head can be hooked into the support hole by the hook to achieve support.

[0014] Furthermore, a spring clip is provided on the main cargo door at a position corresponding to the strut support. When the main cargo door is closed, the spring clip can fix the strut assembly to the inner side of the main cargo door.

[0015] Furthermore, the strut support is sleeved in a groove on the side longitudinal frame, the strut support can rotate and move around the side longitudinal frame in the groove, and the strut joint is movably connected to the strut support via a pin.

[0016] Furthermore, the support rod joint and the support rod are assembled together by interference fit, and the support rod head is rotated and inserted into the support hole to achieve support.

[0017] A cargo drone, comprising the above-mentioned cargo drone cargo door device.

[0018] The present invention has the following beneficial effects:

[0019] The cargo door of the cargo drone disclosed in the present invention is provided with both a door locking device and a gust locking device. The door locking device converts the rotational motion of the door handle into the linear motion of multiple latches to ensure the door is locked. The door reinforcement frame designed around the door maintains the aerodynamic shape of the flight platform as a whole and does not participate in the overall force transmission. The gust lock provided on the door has a simple and reliable structure and is provided with a spring clip structure. When the aircraft platform is in flight, the door support rod can be quickly fixed in the required position without affecting the flight safety of the platform. By supporting the support rod in different limit holes, the door can be quickly positioned at different opening angles to meet different loading and unloading requirements, improve loading efficiency, and have important practical application significance. The door locking device and gust locking device have the characteristics of simple structure and high reliability, and their locking and opening operations are simple and labor-saving, and have good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of a cargo drone and a door locking device of the cargo door device of the present invention Figure 1 ;

[0021] Figure 2 Schematic diagram of a cargo drone and a door locking device of the cargo door device of the present invention Figure 2 ;

[0022] Figure 3 This is a schematic diagram of a cargo drone and a cargo door device with a gust locking device opening at a small angle according to the present invention;

[0023] Figure 4 A schematic diagram of a cargo drone and a cargo door device with a gust locking device opening at a large angle according to the present invention;

[0024] Figure 5 The figure is an overall schematic diagram of a cargo UAV and a cargo door device of the present invention.

[0025] The numbers in the figure are: handle-1, active rod connecting rod-2, driven rod connecting rod-3, pin-4, limit hole-5, side longitudinal frame-6, bolt-7, handle shaft-8, cross joint-9, universal joint-10, rocker arm-11, single-ear joint-12, double-ear joint-13, active rod-14, driven rod-15, spring-16, fixing bracket-17, hatch hinge-18, main cargo door-19, strut assembly-20, hatch frame-21, support hole-22, strut support-23, strut joint-24, strut-25, strut head-26, pin shaft-27, spring clip-28. DETAILED DESCRIPTION

[0026] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] As shown in the figure, Figure 1 Schematic diagram of a cargo drone and a door locking device of the cargo door device of the present invention Figure 1 ; Figure 2 Schematic diagram of a cargo drone and a door locking device of the cargo door device of the present invention Figure 2 ; Figure 3 This is a schematic diagram of a cargo drone and a cargo door device with a gust locking device opening at a small angle according to the present invention; Figure 4 A schematic diagram of a cargo drone and a cargo door device with a gust locking device opening at a large angle according to the present invention; Figure 5 The figure is an overall schematic diagram of a cargo UAV and a cargo door device of the present invention.

[0028] As shown in the figure, the cargo door device includes a main cargo door 19, a door frame 21 and a door hinge 18. The main cargo door 19 is connected to the upper frame of the door frame 21 through the door hinge 18. It is characterized in that: the cargo door device is also provided with a door locking device and a gust locking device; the door locking device includes: a handle 1, an active rod 14, a driven rod 15 and a side longitudinal frame 6 of the door reinforcement frame, the handle 1 is connected to the active rod 14, and a rocker arm 11 is provided at the vertical cross connection between the active rod 14 and the driven rod 15, and the ends of the driven rod connecting rods 3 on both sides of the driven rod 15 pass through the limit on the side longitudinal frame 6 The hole is positioned, and rotating the handle can realize the extension and retraction of the end of the driven rod connecting rod 3 in the limiting hole through the active rod; the main part of the gust locking device is symmetrically arranged on the side longitudinal skeleton 6 on both sides of the main cargo door 19, and the gust locking device includes: a strut support 23, a strut assembly 20 and a support hole 22, the strut support 23 is connected to the side longitudinal skeleton 6, and the strut assembly 20 is connected to the strut support 23. After connection, the strut 25 can swing horizontally and longitudinally relative to the direction of the side longitudinal skeleton 6 with the strut support 23 as the origin; the strut head 26 can clamp the support hole 22 to achieve support.

[0029] The active rod 14 includes a handle shaft 8, a connecting piece and an active rod link 2; the driven rod 15 includes: a single-ear joint 12, a double-ear joint 13, a driven rod link 3 and a pin 4; the door reinforcement frame is a frame structure surrounding the periphery of the door, and the side longitudinal frame 6 is provided with a limiting hole 5; the connecting piece is composed of a cross joint 9 with universal joints 10 connected at both ends; the handle 1 is connected to the handle shaft 8 by a bolt 7, and the handle shaft 8 is connected to the active rod link 2 by the connecting piece. A rocker arm 11 is provided at the connection between the active rod 14 and the driven rod 15, and the rocker arm 11 is connected to the active rod link 2 through the connecting piece. The rocker arm 11 is connected to the driven rod link 3 through the single-ear joint 12, and the driven rod link 3 is connected to the pin 4 through the double-ear joint 13, and the pin 4 is positioned through the limiting hole 5.

[0030] The strut support 23 is connected to the side longitudinal frame 6 of the main cargo door frame, and the strut assembly 20 includes a strut joint 24, a strut 25 and a strut head 26. The strut joint 24 and the strut head 26 are respectively located at the two ends of the strut 25, and the support holes 22 are spaced apart on the two side frames of the door frame 21; the strut joint 24 is movably connected to the strut support 23, and the strut 25 after connection can swing horizontally and longitudinally relative to the side longitudinal frame 6 with the strut support 23 as the origin; the strut head 26 can clamp the support hole 22 to achieve support.

[0031] A compression spring structure is provided at the position of the handle, and the compression spring structure includes a spring 16 and a fixed bracket 17. The two fixed brackets 17 are respectively connected and fixed to the driven rod link 3 on both sides of the rocker arm, and the spring 16 is connected between the two fixed brackets 17. When the handle 1 is rotated and the cabin door is opened, as the driven rod link 3 contracts, the spring 16 is in a compressed state. When the handle 1 is rotated in the opposite direction to close the cabin door, as the driven rod link 3 extends, the spring 16 is still in a compressed state. The elastic force of the spring 16 can help lock the cabin door.

[0032] The support holes 22 are latch holes located on the two side edges of the hatch outer frame 21 for closing the main cargo door. A hook is provided at the position of the strut head 26. When the hatch is opened, the strut head 26 can clamp the support hole 22 through the hook to achieve support. A spring clip 28 is provided at a position corresponding to the strut support 23 on the main cargo door 19. When the main cargo door is closed, the spring clip 28 can fix the strut assembly 20 on the inner side of the main cargo door 2. The strut support 23 is sleeved into the groove on the side longitudinal frame 6. The strut support 23 can rotate and move around the side longitudinal frame in the groove. The strut joint 24 is movably connected to the strut support 23 by a pin 27. The strut joint 24 and the strut 25 are assembled together by interference fit. The strut head 26 is supported by being rotated and clamped into the support hole 22.

[0033] The cargo drone's cargo door system includes a main cargo door 19, a door frame 21, and a door hinge 18. The main cargo door 19 is connected to the upper frame of the door frame 21 via the door hinge 18. The cargo door system also features a door locking device and a gust locking device. The door locking device includes a handle 1, an active rod 14, a passive rod 15, and a longitudinal side frame 6 of a door reinforcement frame. The active rod 14 includes a handle shaft 8, a connector, and an active rod link 2. The passive rod 15 includes a single-ear joint 12, a double-ear joint 13, a passive rod link 3, and a latch 4. There are at least two passive rods 15. The door reinforcement frame is a frame structure surrounding the door and is constructed of a lightweight, rigid material, such as an alloy or a high-strength fiber and resin composite. A limiting hole 5 is provided on the side longitudinal frame 6; the connecting piece is composed of a cross joint 9 with universal joints 10 connected at both ends; the handle 1 is connected to the handle shaft 8 by a bolt 7, and the handle shaft 8 is connected to the active rod connecting rod 2 by the connecting piece, and a rocker arm 11 is provided at the connection between the active rod 14 and the driven rod 15, and the rocker arm 11 is connected to the active rod connecting rod 2 through the connecting piece, and the rocker arm 11 is connected to the driven rod connecting rod 3 through the single-ear joint 12, and the driven rod connecting rod 3 is connected to the pin 4 through the double-ear joint 13, and the pin 4 is positioned by passing through the limiting hole 5; the main part of the gust locking device is symmetrically arranged on the side longitudinal frames 6 on both sides of the main cargo door 19, and the gust locking device includes: a strut support 23, a strut assembly 20 and a support hole 22; the strut support 23 is connected to the main cargo door On the side longitudinal frame 6 of the frame, the strut assembly 20 includes a strut joint 24, a strut 25, and a strut head 26. The strut joint 24 and strut head 26 are respectively located at the two ends of the strut 25. The support holes 22 are spaced apart on the two side frames of the door frame 21. The strut joint 24 is movably connected to the strut support 23. After connection, the strut 25 can swing horizontally and vertically relative to the side longitudinal frame 6 with the strut support 23 as the origin. The strut support 23 can be sleeved into a groove on the side longitudinal frame 6. The strut support 23 can rotate and move around the side longitudinal frame within the groove. The strut joint 24 and the strut support 23 are movably connected via a pin 27. After connection, the strut 25 can swing horizontally and vertically relative to the side longitudinal frame 6 with the strut support 23 as the origin. The strut head 26 can engage the support hole 22 to provide support. The support holes 22 may be latch holes at both side edges of the door outer frame 21 for closing the main cargo door.

[0034] A compression spring structure is provided at the position of the handle, and the compression spring structure includes a spring 16 and a fixed bracket 17. The two fixed brackets 17 are respectively connected and fixed to the driven rod link 3 on both sides of the rocker arm, and the spring 16 is connected between the two fixed brackets 17. When the handle 1 is rotated and the cabin door is opened, as the driven rod link 3 contracts, the spring 16 is in a compressed state. When the handle 1 is rotated in the opposite direction to close the cabin door, as the driven rod link 3 extends, the spring 16 is still in a compressed state. The elastic force of the spring 16 can help lock the cabin door.

[0035] A hook is provided at the position of the strut head 26. When the hatch is opened, the strut head 26 can be supported by the hook by clamping the support hole 22. The strut joint 24 and the strut 25 can also be assembled together by interference fit, and the assembled strut head 26 is rotated and clamped into the support hole 22 to achieve support.

[0036] A spring clip 28 is provided on the main cargo door 19 at a position corresponding to the strut support 23 . When the main cargo door is closed, the spring clip 28 can fix the strut assembly 20 on the inner side of the main cargo door 2 .

[0037] A cargo drone is provided with the above-mentioned cargo drone cargo door device.

[0038] The embodiments of the present invention are further described above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and the changes still fall within the scope of protection of the present invention.

Claims

1. A cargo door device for a cargo drone, comprising a main cargo door, a door frame, and a door hinge, wherein the main cargo door is connected to an upper side frame of the door frame via the door hinge, and characterized in that: The cargo door device is also provided with a door locking device and a gust locking device; The door locking device comprises: a handle, an active rod, a driven rod, and a side longitudinal frame of the door reinforcement frame, the handle being connected to the active rod, a rocker arm being provided at a perpendicular intersection of the active rod and the driven rod, the ends of driven rod connecting rods on both sides of the driven rod being positioned through limiting holes on the side longitudinal frame, and the handle being rotated to enable the ends of the driven rod connecting rods to extend and retract in the limiting holes via the active rod; The main body of the gust locking device is symmetrically arranged on the side longitudinal frames on both sides of the main cargo door, and the gust locking device includes: a strut support, a strut assembly and a support hole, the strut assembly includes a strut joint, a strut and a strut head, the strut support is connected to the side longitudinal frame, the strut assembly is connected to the strut support, and the strut after connection can swing horizontally and vertically relative to the direction of the side longitudinal frame with the strut support as the origin; the strut head can clamp the support hole to achieve support; The active rod includes a handle shaft, a connecting piece and an active rod connecting rod; the driven rod includes: a single-ear joint, a double-ear joint, a driven rod connecting rod and a latch; the door reinforcement frame is a frame structure surrounding the periphery of the door; the connecting piece is composed of a cross joint with universal joints connected at both ends; the handle is connected to the handle shaft by a bolt, the handle shaft and the active rod connecting rod are connected by the connecting piece, a rocker arm is provided at the connection between the active rod and the driven rod, the rocker arm is connected to the active rod connecting rod through the connecting piece, the rocker arm is connected to the driven rod connecting rod through the single-ear joint, the driven rod connecting rod and the latch are connected by the double-ear joint, and the latch is positioned by passing through the limiting hole; The strut support is connected to the side longitudinal frame of the main cargo door frame, the strut joint and the strut head are respectively located at the two ends of the strut, and the support holes are spaced apart on the two side frames of the door frame; the strut joint is movably connected to the strut support.

2. The cargo door device of a cargo drone according to claim 1, characterized in that: A compression spring structure is provided at the position of the handle, and the compression spring structure includes a spring and a fixed bracket. The two fixed brackets are respectively connected and fixed to the driven rod connecting rods on both sides of the rocker arm. The spring is connected between the two fixed brackets. When the handle is rotated and the cabin door is opened, as the driven rod connecting rod contracts, the spring is in a compressed state. When the handle is rotated in the opposite direction to close the cabin door, as the driven rod connecting rod extends, the spring is still in a compressed state. The elastic force of the spring can help lock the cabin door.

3. The cargo door device of a cargo drone according to claim 1, characterized in that: The support holes are latch holes at the two side edges of the door frame for closing the main cargo door.

4. The cargo door device of a cargo drone according to claim 1, characterized in that: A hook is provided at the position of the support rod head. When the hatch is opened, the support rod head can be clamped in the support hole by the hook to achieve support.

5. The cargo door device of a cargo drone according to claim 1, characterized in that: A spring clip is provided on the main cargo door at a position corresponding to the strut support. When the main cargo door is closed, the spring clip can fix the strut assembly on the inner side of the main cargo door.

6. The cargo door device of a cargo drone according to claim 1, characterized in that: The strut support is sleeved in a groove on the side longitudinal frame. The strut support can rotate and move around the side longitudinal frame in the groove. The strut joint is movably connected to the strut support via a pin.

7. The cargo door device of a cargo drone according to claim 1, characterized in that: The support rod joint and the support rod are assembled together by interference fit, and the support rod head is rotated and clamped into the support hole to achieve support.

8. A cargo drone, characterized by: The drone includes the cargo drone cargo door device according to any one of claims 1 to 7.

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