A cargo drone and a cargo door opening and locking device

Abstract

The present invention belongs to the overall design field of aviation aircraft and discloses a cargo drone and a cargo door opening and locking device. The locking device comprises: a handle, an active rod, a driven rod and a cabin door reinforcement frame; the active rod comprises a handle shaft, a connecting piece and an active rod connecting rod; the driven rod comprises: a single-ear joint, a double-ear joint, a driven rod connecting rod and a latch; a limiting hole is provided on the cabin door reinforcement frame; 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 connecting rod by a connecting piece. 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 connecting rod through the connecting piece. The rocker arm is connected to the driven rod connecting rod through a single-ear joint, and the driven rod connecting rod is connected to the latch through a double-ear joint. The latch is positioned by passing through the limiting hole. The cabin door locking device has the characteristics of simple structure and high reliability, and the locking and opening processes are simple and labor-saving to operate, and has good application prospects.

Description

Technical Field

[0001] The present invention belongs to the general design field of aviation vehicles, and in particular relates to a cargo drone and a cargo door opening and locking 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] However, existing large-scale cargo drone door locking devices are complex, lack reliability, or significantly impact the fuselage structure. To address these issues, designing a reliable, structurally optimized, and user-friendly cargo door is of great practical significance. This invention proposes a simplified and highly reliable cargo drone door opening and locking device. Summary of the Invention

[0005] The present invention provides a fast and reliable door locking mechanism, which enables the cargo door to meet the normal loading and unloading requirements of drones. The locking structure is reliable, and during the flight of the drone, the door can maintain the aircraft's aerodynamic shape and bear the aircraft's aerodynamic force. The technical solution of the present invention is as follows:

[0006] A cargo drone cargo door opening locking device comprises: a handle, an active rod, a driven rod and a door reinforcement frame. The handle is connected to the active rod. A rocker arm is provided at the vertical cross connection between the active rod and the driven rod. The ends of the driven connecting rods on both sides of the driven rod are positioned through limiting holes on the door reinforcement frame. Rotating the handle can realize the extension and retraction of the ends of the driven connecting rods in the limiting holes through the active rod.

[0007] Furthermore, the active rod includes a handle shaft, a connecting piece and an active rod connecting rod.

[0008] Furthermore, the driven rod includes: a single-ear joint, a double-ear joint, a driven rod connecting rod and a latch.

[0009] Furthermore, the connecting piece is composed of a cross joint with universal joints connected at both ends.

[0010] Furthermore, the handle is connected to the handle shaft through a bolt, the handle shaft and the active rod connecting rod are connected through the connecting piece, 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 pin are connected through the double-ear joint, and the pin is positioned through the limiting hole.

[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 rods on both sides shrink, 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 in the compressed state can help lock the cabin door.

[0012] Furthermore, there are two or more driven rods.

[0013] Furthermore, the door reinforcement frame is constructed of lightweight hard materials.

[0014] Furthermore, the lightweight hard material is an alloy material or a high-strength fiber and resin composite material.

[0015] A cargo drone, comprising the above-mentioned cargo drone cargo door opening and locking device.

[0016] Compared with the existing large-scale cargo drone door locking devices that are complex in structure, poor in reliability, or have a significant impact on the structure of the fuselage, the present invention has the following beneficial effects:

[0017] The cargo door opening and locking device of the cargo drone disclosed by the present invention converts the rotational motion of the door handle into the linear motion of multiple pins to ensure the locked state of the door; the door reinforcement frame is designed around the door, and the door as a whole maintains the aerodynamic shape of the flight platform and does not participate in the overall force transmission; a compression spring structure is arranged, which can save labor on the one hand, and ensure that the door is always in a closed state during the flight of the platform group on the other hand. The door locking device has the characteristics of simple structure and high reliability, and the locking and opening processes are simple and labor-saving to operate, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a door locking device for a cargo UAV cargo door opening and locking device according to the present invention Figure 1 ;

[0019] Figure 2 Schematic diagram of a door locking device for a cargo UAV cargo door opening and locking device according to the present invention Figure 2 .

[0020] The numbers in the figure are: handle-1, active rod connecting rod-2, driven rod connecting rod-3, pin-4, limit hole-5, door reinforcement 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. DETAILED DESCRIPTION

[0021] 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.

[0022] As shown in the figure, Figure 1 Schematic diagram of a door locking device for a cargo UAV cargo door opening and locking device according to the present invention Figure 1 , Figure 2 Schematic diagram of a door locking device for a cargo UAV cargo door opening and locking device according to the present invention Figure 2 The cargo door opening and locking device of the cargo drone includes: a handle 1, an active rod 14, a driven rod 15 and a door reinforcement frame 6. The handle 1 is connected to the active rod 14. A rocker arm 11 is provided at the vertical cross connection between the active rod 14 and the driven rod 15. The ends of the driven connecting rods 3 on both sides of the driven rod 15 are positioned through the limiting holes 5 on the door reinforcement frame 6. Rotating the handle 1 can realize the extension and retraction of the ends of the driven connecting rods 3 in the limiting holes 5 through the active rod 14.

[0023] The active rod 14 includes a handle shaft 8, a connector, and an active rod connecting rod 2. The driven rod 15 includes a single-ear joint 12, a double-ear joint 13, a driven rod connecting rod 3, and a latch 4. The connector is composed of a cross joint 9 with universal joints 10 connected at both ends.

[0024] The handle 1 is connected to the handle shaft 8 through the bolt 7, the handle shaft 8 is connected to the active rod connecting rod 2 through the connecting piece, the rocker arm 11 is connected to the active rod connecting rod 2 through the connecting piece, the rocker arm 11 is connected to the driven rod connecting rod 3 through the single-ear joint 12, the driven rod connecting rod 3 is connected to the pin 4 through the double-ear joint 13, and the pin 4 is positioned through the limiting hole 5.

[0025] 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 on both sides 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 in the compressed state can help lock the cabin door.

[0026] There are two or more driven rods 15. The door reinforcement frame 6 is made of a light hard material. The light hard material is an alloy material or a high-strength fiber and resin composite material.

[0027] The cargo door opening and locking device of the cargo drone includes: a handle 1, an active rod 14, a driven rod 15 and a door reinforcement frame 6; the active rod 14 includes a handle shaft 8, a connector and an active rod connecting rod 2; the driven rod 15 includes: a single-ear joint 12, a double-ear joint 13, a driven rod connecting rod 3 and a latch 4; the door reinforcement frame 6 is a frame structure surrounding the door, and a limit hole 5 is provided on the door reinforcement frame 6; the connector is composed of a cross joint 9 with a universal joint 10 connected at both ends. The handle 1 is connected to the handle shaft 8 via a bolt 7, and the handle shaft 8 is connected to the active rod link 2 via the connector. A rocker arm 11 is provided at the connection between the active rod 14 and the driven rod 15. The rocker arm 11 is connected to the active rod link 2 via the connector, and the rocker arm 11 is connected to the driven rod link 3 via the single-ear joint 12. The driven rod link 3 is connected to the latch 4 via the double-ear joint 13, and the latch 4 is positioned through the limiting hole 5. There are two or more driven rods 15. The door reinforcement frame 6 is constructed of a lightweight hard material. The lightweight hard material is an alloy material or a high-strength fiber and resin composite material.

[0028] A compression spring structure is provided at the position of the above-mentioned 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 on both sides extends, the spring 16 is still in a compressed state. The elastic force of the spring 16 in the compressed state can help lock the cabin door.

[0029] The UAV cargo door opening and locking device can provide a fast and reliable door locking mechanism, so that the cargo door can meet the normal loading and unloading of the UAV, and the locking structure is reliable. During the flight of the UAV, the door can maintain the aerodynamic shape of the aircraft and can bear the aircraft's aerodynamic force.

[0030] The cargo drone includes the cargo drone cargo door opening and locking device as described above.

[0031] 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 drone cargo door opening and locking device, characterized by: The locking device includes: a handle, an active rod, a driven rod, and a door reinforcement frame. The active rod includes a handle shaft, a connector, 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 handle is connected to the active rod. A rocker arm is provided at the vertical intersection of the active rod and the driven rod. The ends of the driven rod connecting rods on both sides of the driven rod are positioned through limiting holes on the door reinforcement frame. Rotating the handle can cause the ends of the driven rod connecting rods to extend and retract in the limiting holes through the active rod. The connecting piece is composed of a cross joint with universal joints connected at both ends; The handle is connected to the handle shaft via a bolt, the handle shaft is connected to the active rod connecting rod via the connecting piece, the rocker arm is connected to the active rod connecting rod via the connecting piece, the rocker arm is connected to the driven rod connecting rod via the single-ear joint, the driven rod connecting rod is connected to the latch via the double-ear joint, and the latch is positioned by passing through the limiting hole; 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 rods on both sides shrink, 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 in the compressed state can help lock the cabin door.

2. The cargo door opening and locking device for a cargo drone according to claim 1, characterized in that: There are more than two driven rods.

3. The cargo door opening and locking device for a cargo drone according to claim 1, characterized in that: The door reinforcement frame is constructed of light hard materials.

4. The cargo door opening and locking device for a cargo drone according to claim 3, characterized in that: The light hard material is an alloy material or a high-strength fiber and resin composite material.

5. A cargo drone, characterized by: The cargo drone includes the cargo drone cargo door opening and locking device according to claim 1.

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