High-speed air cylinder for air pressure ejection acceleration of unmanned aerial vehicle

Abstract

The high-speed air cylinder comprises a cylinder barrel, a piston assembly, a traction rope, a pipeline connecting piece and a cylinder cover, the two ends of the pipeline connecting piece are connected with the cylinder barrel and the cylinder cover in a sealed and clamped mode respectively, and an air inlet pipeline is arranged in the middle of the pipeline connecting piece in a communicated mode; the piston assembly is arranged in the cylinder barrel in a sealed and sliding mode, one end of the traction rope penetrates through a through hole in the cylinder cover and is connected with the piston assembly, and a gap is formed between the traction rope and the through hole. The piston assembly comprises a base and a connecting column, a cavity with an opening in one side is formed in the base, the connecting column is arranged in the cavity, and one end of the traction rope extends into the cavity and is fixedly connected with the connecting column; a gap sealing structure is arranged between the base and the cylinder barrel. The traction rope is in clearance fit with the through hole, and the piston assembly is in clearance sealing connection with the cylinder barrel, so that the operation friction resistance of the piston assembly is effectively reduced, and the speed increasing effect of the high-speed air cylinder is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-speed cylinders for unmanned aerial vehicles, and in particular relates to a high-speed cylinder for air pressure ejection speed increase of unmanned aerial vehicles. Background Art

[0002] In recent years, the air pressure ejection technology of UAV has been developing continuously. The speed of traditional fast cylinders does not exceed 3 m / s. The general take-off speed of ordinary UAVs is 35m / s. If the speed of UAVs is to be increased from 0 to 35m / s, the length of the launcher needs to be designed to be very long, which puts very high demands on the use environment. Therefore, traditional fast cylinders can no longer meet the current use needs of UAVs. Designing a high-speed cylinder for UAV air pressure ejection has become a top priority. Utility Model Content

[0003] The purpose of the utility model is to provide a high-speed cylinder for air pressure catapult acceleration of unmanned aerial vehicles, aiming to ensure the stability of the movement of the piston assembly while reducing the friction resistance of the piston assembly, thereby effectively improving the acceleration effect of the high-speed cylinder.

[0004] The utility model is mainly realized through the following technical solutions:

[0005] A high-speed cylinder for air pressure catapult acceleration of unmanned aerial vehicles comprises a cylinder barrel, a piston assembly, a traction rope, a pipe connector and a cylinder head, wherein the two ends of the pipe connector are respectively sealed and clamped with the cylinder barrel and the cylinder head, and the middle part of the pipe connector is connected with an air intake pipe; the piston assembly is sealingly and slidably arranged in the cylinder barrel, and a through hole is arranged in the middle part of the cylinder head, one end of the traction rope passes through the through hole on the cylinder head and extends into the interior of the cylinder pipe connector to be connected to the piston assembly, and a gap is arranged between the traction rope and the through hole; the piston assembly comprises a base and a connecting column, a cavity with an opening on one side is arranged inside the base, a connecting column is arranged inside the cavity, one end of the traction rope extends into the cavity and is fixedly connected to the connecting column; a gap sealing structure is provided between the base and the cylinder barrel.

[0006] In order to better realize the utility model, further, the outer side of the base is provided with a transition bushing, the outer side of the base is provided with an embedding groove corresponding to the transition bushing, and the outer diameter of the transition bushing is larger than the outer diameter of the base, and the transition bushing is convexly arranged.

[0007] In order to better realize the utility model, further, the transition bushing is made of ultra-high molecular weight polyethylene material, and the gap between the transition bushing and the cylinder barrel is 0.15 mm.

[0008] In order to better realize the utility model, further, the side walls on both sides of the base are respectively provided with through mounting holes, and the connecting column is inserted between adjacent mounting holes; the transition bushing covers the mounting holes.

[0009] In order to better realize the utility model, further, one end of the cylinder barrel and the cylinder head are respectively provided with a sealing groove along the circumferential side, a sealing rubber ring is sleeved in the sealing groove, and one end of the cylinder barrel and the cylinder head are respectively sealed and connected to the end of the pipe connector through the sealing rubber ring.

[0010] In order to better realize the utility model, further, both ends of the pipe connector are respectively provided with clamping limit steps, and one end of the cylinder barrel and the cylinder head are respectively provided with clamping abutment end faces; the inner diameters of the internal connecting cavities of the cylinder barrel, the cylinder head and the pipe connector are the same.

[0011] In order to better realize the utility model, further, the air intake duct includes an upper section and a lower section which are connected and arranged in sequence from top to bottom, the inner wall diameter of the upper section decreases in sequence from top to bottom, and the inner wall diameter of the lower section increases in sequence from top to bottom.

[0012] The beneficial effects of the utility model are as follows:

[0013] (1) The utility model effectively reduces the friction resistance of the piston assembly through the gap fit between the traction rope and the through hole and the gap seal connection between the piston assembly and the cylinder barrel, effectively improving the speed increase effect of the high-speed cylinder. Secondly, the utility model facilitates the detachable connection of the cylinder barrel, cylinder head and intake pipe through the pipeline connector, which is convenient for subsequent replacement and maintenance; the traction rope is connected to the connecting column inside the piston assembly, which improves the stability of the movement and has good practicality;

[0014] (2) The utility model, through the provision of a transition bushing, not only facilitates the limited installation of the connecting column, but also enhances the operating stability and durability of the piston assembly, and has good practicality;

[0015] (3) The utility model realizes pressurization and buffering of high-pressure gas by setting the upper and lower sections inside the air intake pipe, which not only ensures high-speed operation but also increases the stability of operation, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a high-speed cylinder for air pressure ejection speed increase of a UAV of the utility model;

[0017] Figure 2 is a schematic diagram of the structure of the piston assembly;

[0018] Figure 3 It is a structural schematic diagram of a three-way connector.

[0019] Among them: 1-cylinder barrel, 2-piston assembly, 3-traction rope, 4-pipeline connector, 5-cylinder head, 6-transition bushing, 7-intake pipe, 8-base, 9-connecting column, 10-clamping limit step, 11-upper section, 12-lower section. DETAILED DESCRIPTION

[0020] Embodiment 1:

[0021] A high-speed cylinder for air pressure ejection of unmanned aerial vehicles, such as Figure 1 As shown, it includes a cylinder 1, a piston assembly 2, a traction rope 3, a pipe connector 4 and a cylinder head 5. The two ends of the pipe connector 4 are sealed and clamped with the cylinder 1 and the cylinder head 5 respectively, and the middle part of the pipe connector 4 is connected with an intake pipe 7; the piston assembly 2 is sealed and slidably arranged in the cylinder 1, and the middle part of the cylinder head 5 is provided with a through hole. One end of the traction rope 3 passes through the through hole on the cylinder head 5 and extends into the interior of the pipe connector 4 of the cylinder 1 to connect with the piston assembly 2, and a gap is provided between the traction rope 3 and the through hole; the piston assembly 2 includes a base 8 and a connecting column 9, and the interior of the base 8 is provided with a cavity with one side open, and the interior of the cavity is provided with a connecting column 9, and one end of the traction rope 3 extends into the cavity and is fixedly connected with the connecting column 9; there is a gap sealing structure between the base 8 and the cylinder 1. Specifically, the pipe connector 4 and the intake pipe 7 form a three-way joint structure.

[0022] Preferably, if Figure 2 As shown, the outer side of the base 8 is sleeved with a transition bushing 6, and the side walls of the base 8 are respectively provided with through mounting holes, and the connecting column 9 is inserted between adjacent mounting holes; the transition bushing 6 covers the mounting holes. Specifically, the transition bushing 6 is made of ultra-high molecular weight polyethylene material, and the gap between the transition bushing 6 and the cylinder 1 is 0.15 mm. Through the provision of the transition bushing 6, the utility model facilitates the limited installation of the connecting column 9 on the one hand, and enhances the operating stability and durability of the piston assembly 2 on the other hand. Furthermore, an embedding groove is provided on the outer side of the base 8 corresponding to the transition bushing 6, and the outer diameter of the transition bushing 6 is larger than the outer diameter of the base 8, and the transition bushing 6 is provided outwardly convexly.

[0023] Preferably, if Figure 1 As shown, one end of the cylinder barrel 1 and the cylinder head 5 is respectively provided with a sealing groove along the circumference, and a sealing rubber ring is sleeved in the sealing groove. One end of the cylinder barrel 1 and the cylinder head 5 is respectively sealed and connected to the end of the pipe connector 4 through the sealing rubber ring. Figure 3As shown, both ends of the pipe connector 4 are respectively provided with a snap-in limit step 10, and one end of the cylinder barrel 1 and the cylinder head 5 are respectively provided with a snap-in abutment end surface; the inner diameters of the internal connecting cavities of the cylinder barrel 1, the cylinder head 5 and the pipe connector 4 are the same, and the connection is seamless.

[0024] Preferably, if Figure 3 As shown, the air intake pipe 7 includes an upper section 11 and a lower section 12 which are connected and arranged in sequence from top to bottom, the inner wall diameter of the upper section 11 decreases in sequence from top to bottom, and the inner wall diameter of the lower section 12 increases in sequence from top to bottom. The utility model realizes pressurization and buffering of high-pressure gas by arranging the upper section 11 and the lower section 12 inside the air intake pipe 7, and increases the stability of operation while ensuring high-speed operation.

[0025] The utility model effectively reduces the friction resistance of the piston assembly 2 and effectively improves the speed-increasing effect of the high-speed cylinder by the gap fit between the traction rope 3 and the through hole and the gap sealing connection between the piston assembly 2 and the cylinder barrel 1. Secondly, the utility model facilitates the detachable connection of the cylinder barrel 1, the cylinder head 5 and the intake pipe 7 through the pipeline connector 4, which is convenient for subsequent replacement and maintenance; the traction rope 3 is connected to the connecting column 9 inside the piston assembly 2, which improves the stability of the movement and has good practicality.

[0026] Embodiment 2:

[0027] A high-speed cylinder for air pressure ejection of unmanned aerial vehicles, such as Figure 1-Figure 3 As shown, it mainly includes: a cylinder barrel 1, a piston assembly 2, a traction rope 3, a three-way joint and a cylinder cover 5. The two ends of the three-way joint are sealed with the cylinder barrel 1 and the cylinder cover 5, and the middle part is connected to the cylinder gas. The two ends of the three-way joint are respectively clamped with the cylinder barrel 1 and the cylinder cover 5. One end of the traction rope 3 passes through the through hole of the cylinder cover 5 and extends into the cylinder barrel 1 to connect with the piston assembly 2. The cylinder barrel 1 has sufficient rigidity and strength to provide a stable movement track for the piston assembly 2. The piston assembly 2 is used to withstand the gas pressure and convert the gas pressure into thrust to transmit to the traction rope 3. The cylinder cover 5 is used to block one end of the cylinder barrel 1, and the through hole in the middle of the cylinder cover 5 forms a large gap fit with the traction rope 3.

[0028] like Figure 1 As shown, using a traction rope 3 to replace the traditional piston rod and designing a large clearance fit between the traction rope 3 and the through hole of the cylinder cover 5 can reduce or even eliminate the friction resistance of the piston rod during movement. The piston assembly 2 is implanted inside the cylinder barrel 1, and the sealing structure between the piston assembly 2 and the cylinder barrel 1 is a gap sealing structure, preferably, the gap is 0.15 mm. The transition bushing 6 between the piston assembly 2 and the cylinder barrel 1 is made of ultra-high molecular weight polyethylene material with super wear resistance and self-lubrication. The above measures help the piston assembly 2 reduce friction resistance when moving in the cylinder barrel 1.

[0029] When launching a UAV, high-pressure air instantly enters the cavity formed by the cylinder 1, piston assembly 2, cylinder head 5 and the three-way joint through the air inlet in the middle of the three-way joint. Due to the small volume of the cavity, the high-pressure gas instantly acts on the end face of the piston assembly 2, and the gas pressure is instantly converted into thrust, pushing the piston assembly 2 to move rapidly toward the rear end of the cylinder 1. While the piston assembly 2 moves backward, it drives the traction rope 3 to pull the gliding trolley carrying the UAV to move at high speed on the launcher. Since a gap sealing structure is designed between the piston assembly 2 and the cylinder 1, and the transition between the two is made of a transition bushing 6 made of ultra-high molecular weight polyethylene material with super wear resistance and self-lubrication, and a large gap is used between the traction rope 3 and the cylinder head 5, the above measures reduce the friction resistance of the piston assembly 2 on the cylinder 1 and the traction rope 3 on the cylinder head 5, which has a speed-increasing effect on the air pressure ejection UAV.

[0030] The utility model effectively reduces the friction resistance of the piston assembly 2 and effectively improves the speed-increasing effect of the high-speed cylinder by the gap fit between the traction rope 3 and the through hole and the gap sealing connection between the piston assembly 2 and the cylinder barrel 1. Secondly, the utility model facilitates the detachable connection of the cylinder barrel 1, the cylinder head 5 and the intake pipe 7 through the pipeline connector 4, which is convenient for subsequent replacement and maintenance; the traction rope 3 is connected to the connecting column 9 inside the piston assembly 2, which improves the stability of the movement and has good practicality.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A high-speed cylinder for air pressure catapult acceleration of unmanned aerial vehicles, characterized in that: The invention comprises a cylinder barrel (1), a piston assembly (2), a traction rope (3), a pipe connector (4) and a cylinder cover (5), wherein the two ends of the pipe connector (4) are respectively sealed and clamped with the cylinder barrel (1) and the cylinder cover (5), and an intake pipe (7) is provided in the middle of the pipe connector (4); the piston assembly (2) is sealingly and slidably arranged in the cylinder barrel (1), and a through hole is provided in the middle of the cylinder cover (5); one end of the traction rope (3) passes through the through hole on the cylinder cover (5) and extends into the cylinder barrel (1) and the pipe connector (4) to be connected to the piston assembly (2), and a gap is provided between the traction rope (3) and the through hole; the piston assembly (2) comprises a base (8) and a connecting column (9), a cavity with an opening on one side is provided inside the base (8), a connecting column (9) is provided inside the cavity, one end of the traction rope (3) extends into the cavity and is fixedly connected to the connecting column (9); a gap sealing structure is provided between the base (8) and the cylinder barrel (1).

2. The high-speed cylinder for air pressure ejection speed increase of a drone according to claim 1, characterized in that: The outer side of the base (8) is sleeved with a transition bushing (6), the outer side of the base (8) is provided with an embedding groove corresponding to the transition bushing (6), the outer diameter of the transition bushing (6) is larger than the outer diameter of the base (8), and the transition bushing (6) is provided outwardly convexly.

3. The high-speed cylinder for air pressure ejection speed increase of a drone according to claim 2, characterized in that: The transition bushing (6) is made of ultra-high molecular weight polyethylene material, and the gap between the transition bushing (6) and the cylinder barrel (1) is 0.15 mm.

4. A high-speed cylinder for air pressure ejection speed increase of a drone according to claim 2 or 3, characterized in that: The side walls on both sides of the base (8) are respectively provided with through mounting holes, and the connecting column (9) is inserted between adjacent mounting holes; the transition bushing (6) covers the mounting holes.

5. The high-speed cylinder for air pressure catapult acceleration of unmanned aerial vehicle according to claim 1 is characterized in that: One end of the cylinder barrel (1) and the cylinder cover (5) is respectively provided with a sealing groove along the circumference, a sealing rubber ring is sleeved in the sealing groove, and one end of the cylinder barrel (1) and the cylinder cover (5) is respectively sealed and connected to the end of the pipe connector (4) via the sealing rubber ring.

6. A high-speed cylinder for air pressure ejection speed increase of a drone according to claim 1 or 5, characterized in that: Both ends of the pipe connector (4) are respectively provided with clamping limit steps (10), and one end of the cylinder barrel (1) and the cylinder head (5) are respectively provided with corresponding clamping abutment end faces; the inner diameters of the internal communication cavities of the cylinder barrel (1), the cylinder head (5) and the pipe connector (4) are the same.

7. The high-speed cylinder for air pressure ejection speed increase of a drone according to claim 1, characterized in that: The air intake duct (7) comprises an upper section (11) and a lower section (12) which are connected to each other from top to bottom, the inner wall diameter of the upper section (11) decreases from top to bottom, and the inner wall diameter of the lower section (12) increases from top to bottom.

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