Air bag type modularized gas ejection device for unmanned aerial vehicle

Abstract

The air bag type modularized unmanned aerial vehicle air ejection device comprises a cylinder body, an air bag combination body, an actuating arm, an actuating piston, a buffering exhaust mechanism and an air source, an opening extending in the length direction of the cylinder body is formed in the top of the cylinder body, and the air bag combination body is arranged in the cylinder body; the air bag assembly comprises a plurality of sections of air bags which are sequentially spliced and communicated, the air source is communicated with the rear end of the air bag assembly, the actuating piston is connected with the front end of the air bag assembly, and the actuating arm is connected with the actuating piston and extends out of the cylinder body through the opening. The unmanned aerial vehicle gas ejection device has the advantages of being simple in structure, high in adaptability, reliable in ejection and high in ejection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle ejection, and in particular to an airbag-type modularized unmanned aerial vehicle gas ejection device. Background Art

[0002] In the field of UAV technology, the ejection system of UAV is an important research direction. There are several ways for UAV to take off, such as ejection, slide takeoff and rocket-assisted takeoff. Among them, pneumatic ejection is one of the main ways, mainly based on the open cylinder solution of patents CN109178335B, CN110466794A and the closed cylinder solution of CN114524107B, CN108190040A.

[0003] Patent CN109178335B adopts a gas turbine as the gas power system, and forms a certain vacuum at both ends of the ejection piston through air suction and exhaust, reducing the launch resistance. A sealed cavity is formed by the piston and the cylinder body, and the gas pushes the piston to move, thereby accelerating the aircraft.

[0004] Patent CN110466794A solution forms a sealing effect on the open cylinder body through a metal sealing strip and a sealing strip hook.

[0005] Patents CN108190040A and CN114524107B both use a method of connecting the two ends of a piston in a sealed cylinder to a steel wire rope. The piston moves left and right in the cylinder, driving the steel wire rope to slide, and then amplifies the speed through a speed ratio mechanism, thereby achieving traction drive of the drone on the steel wire rope.

[0006] The above solutions each have some disadvantages, as follows: Among them, the CN109178335B solution adopts a gas turbine solution, which has problems such as complex system structure, high maintenance cost, low efficiency, high temperature in the cylinder, and many supporting facilities.

[0007] The CN110466794A solution has a simple structure and is easy to implement, but it is easy to get stuck, has low ejection efficiency, takes a long time to prepare for launch, and after multiple launches, the sealing effect is reduced and needs to be replaced.

[0008] Moreover, the above-mentioned traditional open cylinder structure has the problems of poor sealing, high manufacturing cost, long processing time, low assembly and debugging efficiency, and inconvenient adjustment of the fixed length of the open cylinder.

[0009] The CN108190040A and CN114524107B solutions are simple in principle, but both require the addition of additional steel wire ropes and pulleys to realize the conversion from piston motion to drone motion to a certain extent. The external steel wire ropes and pulley groups increase the complexity and unreliability of the system. Summary of the invention

[0010] In view of this, the purpose of the present invention is to provide an airbag-type modular UAV gas ejection device, which has the advantages of simple structure, strong adaptability, reliable launch and high launch efficiency.

[0011] The present invention solves the above problems by the following technical means: An airbag-type modular UAV gas ejection device comprises a cylinder body, an airbag assembly, an actuating arm, an actuating piston, a buffer exhaust mechanism and an air source. The top of the cylinder body is provided with an opening extending along the length direction of the cylinder body. The airbag assembly is arranged in the cylinder body. The airbag assembly comprises a plurality of airbags which are sequentially assembled and connected. The air source is connected to the rear end of the airbag assembly, the actuating piston is connected to the front end of the airbag assembly, the actuating arm is connected to the actuating piston, and the actuating arm extends out of the cylinder body through the opening.

[0012] Furthermore, an airflow buffer device is provided at the connection between the air source and the airbag assembly.

[0013] Furthermore, guide pulleys are arranged between the airbags.

[0014] Furthermore, the buffer exhaust mechanism is arranged at the front end of the cylinder body.

[0015] Furthermore, the buffer exhaust mechanism includes a mechanical buffer mechanism and an exhaust push rod, and an air flow channel connected to the airbag assembly is opened inside the actuating piston, and a one-way valve is arranged on the air flow channel; when the airbag assembly pushes the actuating piston to the front end of the cylinder body, the exhaust push rod pushes open the one-way valve, and the airbag assembly is automatically exhausted.

[0016] Furthermore, an exhaust buffer cavity and an exhaust hole communicated with the exhaust buffer cavity are provided in the exhaust mandrel.

[0017] Beneficial effects of the present invention: 1. Reduce production costs and improve assembly and debugging efficiency: This technical solution separates the sealing and actuation functions of the traditional open cylinder. The airbag realizes sealing, and the open cylinder body realizes constraint and guidance. This can greatly reduce the material, processing and sealing requirements of the open cylinder, thereby significantly reducing production costs, processing time, and improving assembly and debugging efficiency.

[0018] 2. Adapt to different ejection requirements: The cylinder length of the open cylinder of the technical solution can be spliced ​​according to needs, which can adapt to different ejection requirements and improve the versatility and flexibility of the ejection system.

[0019] 3. Solve the problem that the airbag is easily stuck: A guide pulley is arranged between the multi-section airbags of the technical solution to prevent the airbag cylinder from getting stuck or deviating sideways, thereby improving the reliability and stability of the ejection system.

[0020] 4. Improve ejection efficiency and reduce launch preparation time: The cylinder of this technical solution automatically releases gas and recovers the actuator arm at the end of its stroke, which can improve ejection efficiency, reduce launch preparation time, and improve the use efficiency of the UAV.

[0021] In general, compared with the existing technology, this technical solution has significant advantages in reducing production costs, improving assembly and debugging efficiency, adapting to different ejection requirements, solving the problem of airbags getting stuck easily, improving ejection efficiency and reducing launch preparation time, and conveniently and quickly compressing back to the initial state. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention; Figure 2 It is an enlarged schematic diagram of a part of the structure of a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the cylinder body splicing. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present invention will become clearer and more specific. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "head", "tail" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] like Figures 1 to 3As shown, the present invention discloses an airbag-type modular UAV gas ejection device, including a cylinder 3, an airbag assembly, an actuating arm 11, an actuating piston 6, a buffer exhaust mechanism and an air source 1; the top of the cylinder is provided with an opening extending along the length direction of the cylinder, the airbag assembly is arranged in the cylinder, and the airbag assembly includes a plurality of airbags 4 which are sequentially assembled and connected, and the number of airbags can be determined according to needs. In addition, as Figure 3 As shown in the figure, the multi-section cylinder can be quickly assembled and disassembled to meet different ejection requirements. This design not only reduces the production cost, but also improves the assembly and debugging efficiency.

[0028] The gas source is connected to the rear end of the airbag assembly, and can be quickly disassembled and replaced; preferably, an airflow buffer device 2 is provided at the connection between the gas source and the airbag assembly, and the airflow buffer device can be a buffer chamber. When inflating, the airflow buffer device reduces the instantaneous impact of the gas on the airbag. This design avoids the gas directly forming a large instantaneous impact on the airbag, reduces the launch overload, and can also avoid the uneven force on the airbag body and the stuck or side deviation of the cylinder wall.

[0029] The actuating piston is connected to the front end of the airbag assembly, and the actuating arm is connected to the actuating piston, and the actuating arm extends out of the cylinder through the opening. The actuating arm pushes the drone to accelerate, and the actuating arm also serves as a sliding constraint for the actuating piston. This design avoids the situation in which the actuating piston of the existing ejection system is separated from the cylinder after the ejection is completed, and the actuating piston and the airbag need to be manually compressed back to the initial state, thereby reducing the launch preparation time.

[0030] A guide pulley 5 is arranged between the airbags. Specifically, the guide pulley includes a ball structure in contact with the inner wall of the cylinder and a roller structure in contact with the airbag. By designing the guide pulley, the airbag is prevented from getting stuck or deviating in the open cylinder. This design further improves the ejection efficiency and avoids the problem of the airbag getting stuck.

[0031] The buffer exhaust mechanism is arranged at the front end of the cylinder body. The buffer exhaust mechanism includes a mechanical buffer mechanism 10 and an exhaust push rod 9. An air flow channel 7 connected to the airbag assembly is provided inside the actuating piston, and a one-way valve 8 is provided on the air flow channel. When the airbag assembly pushes the actuating piston to the front end of the cylinder body, the exhaust push rod pushes open the one-way valve, and the airbag assembly is automatically exhausted. An exhaust buffer chamber 12 and an exhaust hole 13 connected to the exhaust buffer chamber are provided inside the exhaust push rod. When deflated, the exhaust push rod is inserted into the air flow channel, and the air flow is discharged through the exhaust buffer chamber and the exhaust hole. In this way, the exhaust buffer chamber buffer of the exhaust push rod and the external mechanical buffer mechanism together reduce the speed of the actuating piston and the actuating arm, thereby reducing the impact on the cylinder body.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An airbag-type modular UAV gas ejection device, characterized in that: It includes a cylinder body, an airbag assembly, an actuating arm, an actuating piston, a buffer exhaust mechanism and an air source. The top of the cylinder body is provided with an opening extending along the length direction of the cylinder body. The airbag assembly is arranged in the cylinder body. The airbag assembly includes multiple sections of airbags that are assembled and connected in sequence. The air source is connected to the rear end of the airbag assembly, the actuating piston is connected to the front end of the airbag assembly, the actuating arm is connected to the actuating piston, and the actuating arm extends out of the cylinder body through the opening.

2. The airbag type modular UAV gas ejection device according to claim 1 is characterized in that: An air flow buffer device is arranged at the connection between the air source and the air bag assembly.

3. The airbag type modular UAV gas ejection device according to claim 2 is characterized in that: A guide pulley is arranged between the air bags.

4. The airbag-type modular UAV gas ejection device according to claim 3 is characterized in that: The buffer exhaust mechanism is arranged at the front end of the cylinder body.

5. The airbag type modular UAV gas ejection device according to claim 4 is characterized in that: The buffer exhaust mechanism includes a mechanical buffer mechanism and an exhaust push rod. An air flow channel connected to the airbag assembly is opened inside the actuating piston, and a one-way valve is arranged on the air flow channel. When the airbag assembly pushes the actuating piston to the front end of the cylinder body, the exhaust push rod pushes open the one-way valve, and the airbag assembly is automatically exhausted.

6. The airbag type modular UAV gas ejection device according to claim 5 is characterized in that: An exhaust buffer cavity and an exhaust hole communicated with the exhaust buffer cavity are provided in the exhaust mandrel.

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