Blade restraining mechanism applied to jacking box of coaxial dual-rotor unmanned aerial vehicle

Abstract

The utility model relates to a paddle restraining mechanism applied to a jacking box of a coaxial double-rotor unmanned aerial vehicle, which does not need electrical control, restrains a paddle through a mechanical linkage mechanism, effectively protects the paddle and internal parts of a box body, and greatly reduces the production cost and the use cost of equipment at the same time. Comprising a jacking platform and an unmanned aerial vehicle positioning cylinder coaxially arranged on the jacking platform, the unmanned aerial vehicle positioning cylinder is further provided with at least two sets of paddle restraining assemblies, each paddle restraining assembly comprises a paddle restraining box, a guide column, an unlocking block and an unlocking baffle, the guide column is vertically arranged on the unmanned aerial vehicle positioning cylinder, and the unlocking block is arranged on the unmanned aerial vehicle positioning cylinder. The paddle constraint box is slidably arranged on the guide column in a sleeving mode, the unlocking block and the unlocking baffle are arranged on the paddle constraint box and the jacking platform respectively and correspond to each other in position, and the portion, between the bottom of the paddle constraint box and the unmanned aerial vehicle positioning cylinder, of the guide column is further sleeved with a reset spring. The coaxial double-rotor unmanned aerial vehicle is suitable for the technical field of coaxial double-rotor unmanned aerial vehicles.

Description

Technical Field

[0001] The utility model relates to the technical field of coaxial double-rotor unmanned aerial vehicles, in particular to a blade restraint mechanism applied to a lifting box of a coaxial double-rotor unmanned aerial vehicle. Background Art

[0002] A coaxial double-rotor unmanned aerial vehicle is a coaxial helicopter, which has the advantages of small volume, no tail rotor, high hover efficiency, etc., and has great development potential in the fields of future intelligent and miniaturized transportation, military, etc. Traditional coaxial double-rotor helicopters need to be carried by single soldiers or transported and stored by vehicles. When carried by single soldiers, manual release or recovery is required, and the operation risk is relatively high; during the vehicle transportation and storage process, in order to facilitate the storage and protection of equipment, an airport or hangar needs to be designed in the carriage. Such equipment is relatively large in size, and manual extraction of the helicopter is still required for pre-flight preparation during the mission execution, resulting in low efficiency. There is an unmanned aerial vehicle automatic storage, transportation and take-off device on the market, which stores the unmanned aerial vehicle through a storage and transportation box and cooperates with a lifting mechanism to automatically complete the pre-flight preparation work. However, since there is no mechanism for fixing and restraining the blades inside the storage and transportation box, the blades of the unmanned aerial vehicle cannot be fixed during transportation, resulting in collisions or frictions between the blades and other components inside the storage and transportation box, causing damage and deformation of the blades, seriously affecting the functions and service lives of the unmanned aerial vehicle and the storage and transportation box.

[0003] In the invention patent document with the application number 202410301908.0, a coaxial double-rotor unmanned aerial vehicle lifting box and an unmanned aerial vehicle automatic take-off control method are disclosed. The unmanned aerial vehicle is stored through a box body, and the automatic release or recovery function of the unmanned aerial vehicle is realized by cooperating with a positioning cylinder and a lifting mechanism. And a locking component for fixing the blades is arranged in the positioning cylinder to ensure that the blades will not rub against the internal parts of the box body during the up and down movement of the unmanned aerial vehicle inside the box body, playing a protective role. In the above patent solution, the locking component is driven by a driving part. When the sensor detects that the unmanned aerial vehicle has risen in place, the driving part is started and drives the blade fixing part to disengage from the blade; this design requires an independent driving part or a driving part linked with the lifting mechanism to be arranged on the positioning cylinder, making the internal structure of the equipment more complex and increasing the production cost and use cost of the equipment. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, and provide a blade restraint mechanism applied to a lifting box of a coaxial double-rotor unmanned aerial vehicle, which does not require electrical control, restrains the blades through a mechanical linkage mechanism, effectively protects the blades and the internal parts of the box body, and greatly reduces the production cost and use cost of the equipment.

[0005] The technical solution adopted by the utility model is as follows: The utility model includes a jacking platform and a drone positioning cylinder coaxially arranged on the jacking platform. The jacking platform is arranged in a jacking box through a lifting motor. At least two groups of blade restraint assemblies are further arranged on the drone positioning cylinder. The blade restraint assembly includes a blade restraint box, a guide post, an unlocking block and an unlocking baffle. The guide post is vertically arranged on the drone positioning cylinder. The blade restraint box is slidably sleeved on the guide post. The unlocking block and the unlocking baffle are respectively arranged on the blade restraint box and the jacking platform and are in corresponding positions. A return spring is further sleeved on the guide post between the bottom of the blade restraint box and the drone positioning cylinder.

[0006] Further, the unlocking block is rotatably connected to the blade restraint box through a rotating shaft pin. A restraint push rod is arranged on the unlocking block. A return torsion spring is further sleeved on the rotating shaft pin. Under the action of the return torsion spring, the unlocking block is maintained in the working state, that is, the restraint push rod is maintained in the vertical placement state, and the upper and lower end faces of the unlocking block are both inclined surfaces.

[0007] Further, the blade restraint box is composed of an upper blade box and a lower blade box. The upper blade box and the lower blade box are fixedly connected through at least one positioning pin. The unlocking block is rotatably connected to the lower end face of the lower blade box through the rotating shaft pin. The return torsion spring acts on the unlocking block and the lower blade box respectively.

[0008] Further, the drone positioning cylinder is divided into an upper layer and a lower layer of a double-layer structure. The guide post is vertically arranged on the lower layer and penetrates the upper layer at the top. The lower blade box is slidably sleeved on the guide post and is located between the upper layer and the lower layer. The upper blade box is slidably sleeved on the guide post and is located above the upper layer.

[0009] Further, a limit block is further sleeved on the guide post. The lower end face of the limit block is fixedly connected to the lower blade box. The return spring is located between the lower blade box and the lower layer.

[0010] Further, limiting inner cavities adapted to the tips of the drone blades are arranged on the inner side surfaces of the upper blade box and the lower blade box.

[0011] Finally, a rotation stopping block is further arranged on the unlocking block.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: By providing at least two groups of the blade restraint assemblies on the UAV positioning cylinder of the present utility model, through the mechanical linkage among the unlocking block, the unlocking baffle and the return spring, the blades of the UAV stored in the lifting box are restrained and fixed, replacing the original electric drive structure, that is, realizing the automatic locking and unlocking of the blades. At the same time, the internal structure of the lifting box is optimized, without adding additional drive components, effectively avoiding interference among internal parts and between the UAV blades and internal parts, effectively protecting the UAV blades and the internal parts of the lifting box. Ensuring the integrity of the blades can guarantee the flight quality of the UAV, and also greatly reduces the production cost and use cost of the equipment. Therefore, the present utility model does not require electric control, restrains the blades through a mechanical linkage mechanism, effectively protects the blades and the internal parts of the box body, and at the same time greatly reduces the production cost and use cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 is a schematic diagram of the state of the blade restraint assembly and the UAV under the blade restraint state;

[0015] Figure 3 is a schematic diagram of the state of the blade restraint assembly and the UAV under the blade unlocking state;

[0016] Figure 4 is a schematic diagram of the overall structure of the blade restraint assembly;

[0017] Figure 5 is Figure 4 an enlarged schematic diagram of A in

[0018] Figure 6 is an exploded view of the unlocking block and the lower blade box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown in the figure, the utility model includes a jacking platform 1 and a drone positioning cylinder 2 coaxially arranged on the jacking platform 1. The jacking platform 1 is arranged in a jacking box 3 through a lifting motor. In this embodiment, two groups of blade constraint components are arranged on the drone positioning cylinder 2, and the two groups of blade constraint components are respectively arranged on both sides of the drone positioning cylinder 2, and the positions correspond to the positions where the drone blades to be placed are located. The blade constraint component includes a blade constraint box, a guide post 4, an unlocking block 5 and an unlocking baffle 6. The guide post 4 is vertically arranged on the drone positioning cylinder 2, the blade constraint box is slidably sleeved on the guide post 4, the unlocking block 5 and the unlocking baffle 6 are respectively arranged on the blade constraint box and the jacking platform 1 and the positions correspond to each other. A return spring 7 is also sleeved on the guide post 4 between the bottom of the blade constraint box and the drone positioning cylinder 2. The utility model realizes the constraint and fixation of the blades of the drone stored in the jacking box 3 by arranging at least two groups of the blade constraint components on the drone positioning cylinder, and utilizes the mechanical linkage between the unlocking block 5, the unlocking baffle 6 and the return spring 7, that is, realizes the automatic locking and unlocking of the blades, without adding additional driving components, effectively protects the drone blades and the internal parts of the jacking box 3, ensures the integrity of the blades to ensure the flight quality of the drone, and also greatly reduces the production cost and use cost of the equipment.

[0020] In the present utility model, the unlocking block 5 is rotationally connected to the blade restraint box through a shaft pin 8. A restraint push rod 9 is provided on the unlocking block 5. A return torsion spring 10 is also sleeved on the shaft pin 8. Under the action of the return torsion spring 10, the unlocking block 5 is maintained in the working state, that is, the restraint push rod 9 is maintained in the vertical placement state. Both the upper and lower end faces of the unlocking block 5 are inclined surfaces. The blade restraint box is composed of an upper blade box 11 and a lower blade box 12. The upper blade box 11 and the lower blade box 12 are fixedly connected through at least one positioning pin 13. The unlocking block 5 is rotationally connected to the lower end face of the lower blade box 12 through the shaft pin 8. The return torsion spring 10 acts on the unlocking block 5 and the lower blade box 12 respectively. In this embodiment, the upper blade box 11 and the lower blade box 12 are connected by two positioning pins 13. The unmanned aerial vehicle positioning cylinder 2 is divided into a double-layer structure of an upper layer 14 and a lower layer 15. The guide post 4 is vertically arranged on the lower layer 15 and penetrates the upper layer 14 at the top. The lower blade box 12 is slidably sleeved on the guide post 4 and is located between the upper layer 14 and the lower layer 15. The upper blade box 11 is slidably sleeved on the guide post 4 and is located above the upper layer 14. In this embodiment, the upper blade box 11 and the lower blade box 12 are respectively connected to the lower layer 15 through the corresponding guide posts 4. A limit block 16 is also sleeved on the guide post 4. The lower end face of the limit block 16 is fixedly connected to the lower blade box 12. The return spring 7 is located between the lower blade box 12 and the lower layer 15. Limiting inner cavities adapted to the tips of the unmanned aerial vehicle blades are provided on the inner side surfaces of the upper blade box 11 and the lower blade box 12. A rotation stop block 17 is further provided on the unlocking block 5. In this embodiment, the rotation stop block 17 is arranged at the position where the shaft pin 8 is rotationally connected to the lower blade box 15.

[0021] When the unmanned aerial vehicle needs to take off and work, the lifting motor drives the lifting platform 1 to move upward, driving the unmanned aerial vehicle positioning cylinder 2 to also move upward. When it moves to the top of the lifting box 3, the unlocking block 5 abuts against the unlocking baffle 6. Under the action of the rotation stop block 17, the unlocking block 5 drives the blade restraint box to stop moving upward relative to the unmanned aerial vehicle positioning cylinder 2 and compress the return spring 7, thereby causing the upper blade box 11 and the lower blade box 12 to disengage from the unmanned aerial vehicle blades, realizing unlocking. After the lifting platform 1 rises to the top, the lifting motor stops working, and the blades can be unfolded according to the work needs. After the coaxial unmanned aerial vehicle takes off, the lifting platform 1 automatically descends to the bottom of the lifting box 3 under the drive of the lifting motor, and the top cover of the lifting box 3 is closed to complete the take-off work.

[0022] When it is necessary to constrain and fix the propeller blades of the drone stored in the storage and transportation box 3, the top cover of the storage and transportation box 3 is opened, and the lifting motor drives the jacking platform 1 to move upward, driving the drone positioning cylinder 2 to move upward. When it is about to move to the top of the storage and transportation box 3, the unlocking block 5 and the unlocking baffle 6 are against each other. Under the action of the stop block 17, the unlocking block 5 cannot rotate downward to avoid, and the unlocking baffle 6 limits the unlocking block 5 to continue to rise, and at the same time drives the propeller constraint box to stop moving upward relative to the drone positioning cylinder 2, compressing the return spring 7. After the jacking platform 1 rises to the top, the lifting motor stops; at this time, manually press the lower propeller box 12 downward to separate the unlocking block 5 from the unlocking baffle 6 from each other, and push the constraint push rod 9 to one side of the lower propeller box 12. After the unlocking block 5 rotates upward until the contact surface between it and the unlocking baffle 6 is higher than the unlocking baffle 6, the unlocking block 5 and the unlocking baffle 6 are staggered with each other and the pressure on the lower propeller box 12 is relieved. At this time, the entire blade constraint box slides upward on the guide column 4 under the action of the return spring 7 until the upper end surface of the limit block 16 abuts against the lower end surface of the upper layer 14, and the thrust on the constraint push rod 9 can be removed; at this time, the blade constraint box mechanism is in a locked working state, the drone can be placed in the drone positioning cylinder, and the blades are inserted into the cavities of the upper blade box 11 and the lower blade box 12 to complete the constraint and fixation of the drone, ensuring that the blades will not unfold or shake and scatter during transportation, avoiding collision with the internal parts of the jacking box 3, and ensuring the integrity of the jacking box 3 and the drone itself; after completing the blade constraint and fixation, the lifting motor arranged inside the jacking box 3 drives the jacking platform 1 together with the drone to be stored in the jacking box 3. During the downward movement, due to the inclined design of the lower surface of the unlocking block 5 and the elastic action of the return torsion spring 10, the unlocking block 5 easily avoids the unlocking baffle 6, and the jacking platform 3 drives the drone positioning cylinder 2 to move downward smoothly.

[0023] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A blade restraint mechanism applied to a coaxial twin-rotor UAV lifting box, comprising a lifting platform (1) and a UAV positioning cylinder (2) coaxially arranged on the lifting platform (1), wherein the lifting platform (1) is arranged in a lifting box (3) via a lifting motor, and is characterized in that: At least two groups of blade restraint assemblies are also arranged on the UAV positioning cylinder (2), and the blade restraint assemblies include a blade restraint box, a guide column (4), an unlocking block (5) and an unlocking baffle (6). The guide column (4) is vertically arranged on the UAV positioning cylinder (2), and the blade restraint box is slidably sleeved on the guide column (4). The unlocking block (5) and the unlocking baffle (6) are respectively arranged on the blade restraint box and the jacking platform (1) and have corresponding positions. A reset spring (7) is also sleeved on the guide column (4) between the bottom of the blade restraint box and the UAV positioning cylinder (2).

2. The blade restraint mechanism for a coaxial twin-rotor UAV lifting box according to claim 1 is characterized in that: The unlocking block (5) is rotatably connected to the blade constraint box via a rotating shaft pin (8); a constraint push rod (9) is provided on the unlocking block (5); a reset torsion spring (10) is also sleeved on the rotating shaft pin (8); under the action of the reset torsion spring (10), the unlocking block (5) is kept in a working state, that is, the constraint push rod (9) is kept in a vertically placed state, and the upper and lower end surfaces of the unlocking block (5) are both inclined surfaces.

3. The blade restraint mechanism for a coaxial twin-rotor UAV lifting box according to claim 2 is characterized in that: The blade restraint box is composed of an upper paddle box (11) and a lower paddle box (12), wherein the upper paddle box (11) and the lower paddle box (12) are fixedly connected via at least one positioning pin (13), the unlocking block (5) is rotatably connected to the lower end surface of the lower paddle box (12) via the rotating shaft pin (8), and the return torsion spring (10) acts on the unlocking block (5) and the lower paddle box (12) respectively.

4. The blade restraint mechanism for a coaxial twin-rotor UAV lifting box according to claim 3 is characterized in that: The drone positioning tube (2) is divided into a double-layer structure of an upper layer (14) and a lower layer (15); the guide column (4) is vertically arranged on the lower layer (15), and the top thereof penetrates the upper layer (14); the lower propeller box (12) is slidably mounted on the guide column (4) and is located between the upper layer (14) and the lower layer (15); and the upper propeller box (11) is slidably mounted on the guide column (4) and is located above the upper layer (14).

5. The blade restraint mechanism for a coaxial twin-rotor UAV lifting box according to claim 4 is characterized in that: A limit block (16) is also sleeved on the guide column (4), the lower end surface of the limit block (16) is fixedly connected to the lower paddle box (12), and the return spring (7) is located between the lower paddle box (12) and the lower layer (15).

6. The blade restraint mechanism for a coaxial twin-rotor UAV lifting box according to claim 5 is characterized in that: The inner sides of the upper propeller box (11) and the lower propeller box (12) are both provided with a limiting inner cavity adapted to the tip of the drone blade.

7. The blade restraint mechanism for a coaxial twin-rotor UAV lifting box according to claim 6 is characterized in that: The unlocking block (5) is also provided with a rotation-stopping block (17).

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