A controllable parachute recovery device for an aircraft

Abstract

The present application belongs to the field of aircraft recovery technology, and provides a controllable parachute recovery device for aircraft, which comprises an opening parachute motor (1), a motor support (2), a motor rocker arm (3), a connecting rod (4), a recovery parachute cabin (5), a parachute cabin cover (6), a lock block torsional spring (9), a lock block rotating shaft (10), a driving rod (11), an unlocking hook (12), a spring guide rod (13), an initial lock rod (14), an opening parachute shaft (21), an opening parachute compression spring (18), a parachute hanging screw rod (17), a recovery parachute (19), a tower spring (20), and a tower spring pressing plate (15). The technical scheme of the present application solves the problems of low safety, poor testability and non-repeatability of recovery of the pyrotechnics by unlocking the connecting rod mechanism driven by the motor and opening the parachute by the tower spring and the compression spring in combination.

Description

Technical Field

[0001] This invention belongs to the field of aircraft recovery technology, specifically relating to a controllable parachute recovery device for aircraft. Background Technology

[0002] Aircraft recovery technology is a key technology for reducing operating costs and protecting high-value payloads. Reliable recovery technology enables core components to be reused multiple times. After being inspected and maintained, recovered aircraft can be quickly returned to flight, which is of great significance for handling high-frequency flight missions.

[0003] Current recovery methods rely on pyrotechnic devices such as explosive bolts for parachute deployment and recovery. Pyrotechnic devices are often non-reusable and can cause fatigue failure due to impacts on mechanical components. Furthermore, existing motor-driven rocker arm direct deployment mechanisms have inherent disadvantages: insufficient auxiliary spring force makes it difficult to push open the canopy cover directly, thus preventing the parachute pack from being deployed; excessive auxiliary spring force results in insufficient motor torque, hindering reliable canopy opening. This contradiction leads to very low reliability of the motor-driven rocker arm direct deployment mechanism. Moreover, the same type of pyrotechnic device is often difficult to use interchangeably on multiple aircraft, and developing different types requires higher development costs and longer development cycles. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] The technical problem to be solved by the present invention is to provide a reusable, highly reliable, and safe recovery device that can be adapted to a variety of aircraft.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, the present invention provides a controllable parachute landing and recovery device for aircraft, including a parachute opening motor, a motor bracket, a motor rocker arm, a connecting rod, a recovery parachute compartment, a parachute compartment cover, a parachute compartment locking block torsion spring, a locking block rotating shaft, a drive rod, an unlocking hook, a spring guide rod, an initial locking rod, a parachute opening shaft, a parachute opening compression spring, a parachute hanging screw, a recovery parachute, a tower spring, and a tower spring pressure plate;

[0008] The recovery parachute compartment is an open box structure; a parachute shaft is fixedly installed on one side of the opening of the recovery parachute compartment, and a protruding flat plate is installed on the other side opposite to the position of the parachute shaft.

[0009] The motor bracket is fixed on the protruding plate, and the umbrella opening motor is fixedly connected to the motor bracket. One end of the motor rocker arm is connected to the output shaft of the umbrella opening motor, and the other end of the motor rocker arm is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to one end of the unlocking hook, and the other end of the unlocking hook is rotatably connected to the locking block shaft. One end of the locking block shaft is fixed to the motor bracket, and the umbrella compartment locking block torsion spring is set on the locking block shaft. The umbrella compartment locking block torsion spring is used to provide locking force for the initial locking rod. One end of the initial locking rod is rotatably connected to the locking block shaft, and the other end is set as a cam part. One end of the drive rod is fixed to the middle of the unlocking hook, and the other end is hinged to the cam part of the initial locking rod.

[0010] One side of the canopy cover is configured as a semi-circular bushing and suspended on the opening shaft, while the other side of the canopy cover is provided with a locking hook that engages with the initial locking rod cam.

[0011] The spring guide rod is fixed to the outside of the recovery parachute compartment, and the parachute opening spring is sleeved on the spring guide rod. One end of the parachute opening spring contacts the recovery parachute compartment, and the other end contacts the inside of the parachute compartment cover.

[0012] The tower spring pressure plate and the tower spring are installed inside the recovery parachute compartment; one end of the tower spring is fixedly connected to the bottom of the recovery parachute compartment, and the other end is fixedly connected to the tower spring pressure plate; the recovery parachute is placed between the tower spring pressure plate and the parachute compartment cover.

[0013] The recovery parachute compartment has protruding lugs for installing the parachute hanging screw, and the main parachute rope is connected to the hanging screw; one end of the recovery parachute guide umbrella is connected to the main parachute, and the other end of the guide umbrella is connected to the parachute compartment cover.

[0014] Furthermore, the opening shaft has a large diameter in the middle and small diameters at both ends, and the canopy cover is suspended on the opening shaft by two semi-circular bushings and is limited to the left and right.

[0015] Furthermore, the motor bracket, motor rocker arm, connecting rod, and unlocking hook form a parallelogram linkage mechanism.

[0016] Furthermore, the locking hook of the parachute canopy has an L-shaped structure.

[0017] Furthermore, the inner wall of the recovery parachute compartment is equipped with a track to guide the tower spring pressure plate.

[0018] Furthermore, the spring guide rod is a long rod structure with a thread at one end, and the spring guide rod is connected to the recovery parachute compartment by a thread.

[0019] Furthermore, after the initial locking lever is unlocked, the canopy rotates around the canopy shaft and then detaches from the shaft after rotating to the appropriate angle.

[0020] Furthermore, after the parachute compartment cover detaches, the recovery parachute, tower spring pressure plate, and tower spring are released from their constraints. The tower spring drives the tower spring pressure plate to push the recovery parachute out of the recovery parachute compartment along the inner wall track. At the same time, the parachute compartment cover pulls the recovery parachute and guides it out of the compartment during the detachment process.

[0021] Furthermore, after the recovery parachute exits the cabin, its pilot parachute opens under the action of aerodynamic drag. Subsequently, the pilot parachute drives the main parachute to open. After the main parachute opens, the connection between the pilot parachute and the main parachute is disconnected.

[0022] Furthermore, the canopy cover has a manual unlocking notch at the locking hook, which is used to manually release the initial locking rod from the canopy cover.

[0023] (III) Beneficial Effects

[0024] Compared with existing technologies, this invention has the following advantages: Addressing the reliance on pyrotechnics in traditional parachute recovery, this invention uses a motor-driven linkage mechanism for unlocking, with the tower spring and compression spring working together to open the parachute, thus solving the problems of low safety, poor testability, and non-repeatable recovery associated with pyrotechnics. This invention is suitable for the reliable recovery of drones, small rockets, spacecraft, and other aircraft in complex environments, possessing significant advantages such as simple structure, light weight, high applicability, high reliability, and high safety, and has great potential for widespread application. Attached Figure Description

[0025] Figure 1 This is a front view of the controlled parachute landing and recovery device for the aircraft of the present invention in the locked state.

[0026] Figure 2 This is a cross-sectional view of the controlled parachute landing and recovery device for the aircraft of the present invention in the locked state.

[0027] Figure 3 This is a front view of the unlocked state of the controllable parachute recovery device for the aircraft of the present invention.

[0028] Figure 4 This is a cross-sectional view of the controllable parachute recovery device for the aircraft of the present invention in the unlocked state.

[0029] Figure 5 This is a schematic diagram of the linkage mechanism of the controllable parachute landing and recovery device for aircraft of the present invention.

[0030] Figure 6 This is a schematic diagram of the parachute canopy locking structure of the controllable parachute landing and recovery device for aircraft of the present invention.

[0031] Figure 7 This is a schematic diagram of the ground debugging structure of the controllable parachute landing and recovery device for the aircraft of the present invention.

[0032] Figure 8 This is a schematic diagram of the controllable parachute landing and recovery device for aircraft of the present invention.

[0033] Figure 9 This is a schematic diagram of the parachute canopy limiting structure of the controllable parachute landing and recovery device for aircraft of the present invention.

[0034] Figure 10 This is a top view of the controlled parachute recovery device for the aircraft of the present invention in the locked state.

[0035] Figure 11 This is an isometric drawing of the controllable parachute landing and recovery device for aircraft of the present invention.

[0036] The components represented by the numbers in the diagram are as follows:

[0037] 1: Umbrella opening motor; 2: Motor bracket; 3: Motor rocker arm; 4: Connecting rod; 5: Recovering umbrella compartment; 6: Umbrella compartment cover; 7: Connecting rod shaft one; 8: Connecting rod shaft two; 9: Umbrella compartment locking block torsion spring; 10: Locking block rotating shaft; 11: Drive rod; 12: Unlocking hook; 13: Spring guide rod; 14: Initial locking rod; 15: Tower spring pressure plate; 16: Umbrella hanging nut; 17: Umbrella hanging screw; 18: Umbrella opening compression spring; 19: Recovering umbrella; 20: Tower spring; 21: Umbrella opening shaft. Detailed Implementation

[0038] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0039] The controllable parachute recovery device for aircraft provided in this embodiment consists of a parachute opening motor 1, a motor bracket 2, a motor rocker arm 3, a connecting rod 4, a recovery parachute compartment 5, a parachute compartment cover 6, a connecting rod shaft 1 7, a connecting rod shaft 2 8, a parachute compartment locking block torsion spring 9, a locking block rotating shaft 10, a drive rod 11, an unlocking hook 12, a spring guide rod 13, an initial locking rod 14, a parachute opening shaft 21, a parachute opening compression spring 18, a parachute hanging screw 17, a parachute hanging nut 16, a recovery parachute 19, a tower spring 20, and a tower spring pressure plate 15.

[0040] The recovery umbrella compartment 5 is an integral box-shaped structure, with most of the internal space used for filling the recovery umbrellas. The protruding flat section is used to install the recovery device. The motor bracket 2 is threadedly fixed to the recovery umbrella compartment 5, the umbrella opening motor 1 is fixedly fixed to the motor bracket 2, and the umbrella opening shaft 21 is screwed to the recovery umbrella compartment 5. The umbrella opening shaft 21 has a larger diameter in the middle and smaller diameters at both ends, so the umbrella compartment cover 6 can be suspended on the umbrella opening shaft 21 in the form of a semi-circular bushing and limited to the left and right (e.g., Figure 9As shown, after the restraints are released, the semi-circular bushing of the canopy cover 6 can detach under wind resistance. The locking block shaft 10 has a structure similar to a shoulder screw, with the large-diameter part supporting the canopy locking block torsion spring 9 and the small-diameter part serving as the shaft for the unlocking hook 12 and the initial locking rod 14. In use, the locking block shaft 10 passes through the initial locking rod 14, the unlocking hook 12, the motor bracket 2, and the canopy locking block torsion spring 9 in sequence before being stopped by a retaining spring. The unlocking hook 12 has a threaded hole in the middle for mounting the drive rod 11, and has clear holes at the front and rear ends. The connecting rod 4 has clear holes at the front and rear ends. The connecting rod shaft 7 passes through the unlocking hook 12 and the connecting rod 4 before being stopped by a retaining spring. The motor rocker arm 3 meshes with the opening motor 1 through a gear structure and can rotate around the shaft of the opening motor 1. The connecting rod shaft 8 passes through the motor rocker arm 3 and the connecting rod 4 before being stopped by a retaining spring. The spring guide rod 13 is a long rod structure with a thread at one end. Spring guide rod 13 is threadedly connected to the recovery parachute compartment 5. The opening spring 18 provides the opening force guided by spring guide rod 13. The recovery parachute compartment 5 has protruding lugs for mounting the parachute hanging screw 17, which passes through the recovery parachute compartment 5 and is screwed onto the parachute hanging nut 16. The main parachute ropes of the recovery parachute 19 are connected to the hanging screw 17. The compartment cover 6 has small holes for threading the ropes. One end of the guide parachute of the recovery parachute 19 is connected to the main parachute, and the other end is connected to the compartment cover 6. A tower spring pressure plate 15 is placed flat under the recovery parachute 19. One end of the tower spring 20 is fixedly connected to the recovery parachute compartment 5, and the other end is fixedly connected to the tower spring pressure plate 15.

[0041] The controllable parachute recovery device for aircraft of this invention includes the following steps: In the initial locked state of the recovery system, the parachute canopy 6 is locked under the combined action of the initial locking rod 14 and the parachute canopy locking block torsion spring 9, constraining the recovery parachute 19 inside the recovery parachute canopy 5. The contact area between the initial locking rod 14 and the parachute canopy 6 is a cam structure. As the torque of the parachute canopy locking block torsion spring 9 increases, the initial locking rod 14 will increase the locking force on the parachute canopy 6. When the aircraft completes its work and needs to be recovered, the motor starts, driving the motor rocker arm 3. The motor rocker arm 3 drives the unlocking hook 12 through the connecting rod 4. The unlocking hook 12 drives the drive rod 11, which drives the initial locking rod 14 to rotate around the locking block pivot 10 to complete the unlocking. After the initial locking rod 14 is unlocked, the parachute canopy 6 rotates around the parachute shaft 21 under the action of the parachute opening compression spring 18, gravity, and aerodynamic drag, and disengages after rotating to a certain angle. After the parachute compartment cover 6 detaches, the recovery parachute 19, the tower spring pressure plate 15, and the tower spring 20 are released from their constraints. The tower spring 20 drives the tower spring pressure plate 15 to push the recovery parachute 19 out of the recovery parachute compartment 5 along the inner wall track. At the same time, during the detachment process, the parachute compartment cover 6 pulls the recovery parachute 19 and the guide parachute out of the compartment. After the recovery parachute 19 exits the compartment, the guide parachute opens under the action of aerodynamic drag. Subsequently, the guide parachute drives the main parachute to open. After the guide parachute pulls the main parachute to open, the connection between the guide parachute and the main parachute is disconnected. Finally, the aircraft decelerates, stabilizes, and is safely recovered under the action of the main parachute.

[0042] Furthermore, the volume of the recovery parachute compartment 5 can be adjusted according to factors such as the aircraft's mass, parachute opening altitude, and required descent speed, and the geometric dimensions of the recovery parachute compartment 5 and the parachute compartment cover 6 can be adjusted according to factors such as the volume of the recovery parachute compartment 5 and the size constraints of the aircraft.

[0043] Furthermore, the controllable parachute recovery device for the aircraft can be tested for reliability on the ground. By using a preset manual unlocking notch, the initial locking lever 14 can be manually released from the parachute compartment cover 6 at any time, and the parachute compartment cover 6 can be closed at any time after ground testing is completed to complete the installation.

[0044] The assembly process of the recycling device is as follows: Connect the umbrella opening motor 1 to the motor bracket 2 with screws. Then, pass the first connecting rod shaft 7 through the motor rocker arm 3 and the connecting rod 4 and limit it with a retaining spring. Next, pass the second connecting rod shaft 8 through the unlocking hook 12 and the connecting rod 4 and limit it with a retaining spring. Then, connect the drive rod 11 to the unlocking hook 12 with threads. Finally, pass the locking block rotating shaft 10 through the umbrella compartment locking block torsion spring 9, the initial locking rod 14, the unlocking hook 12 and the motor bracket 2 in sequence and limit it with a retaining spring. The front and rear lever arms of the umbrella compartment locking block torsion spring 9 must be fully engaged in the motor bracket 2 and the initial locking rod 14. At this point, the linkage mechanism of the recycling device is assembled. Afterwards, connect the linkage mechanism to the recovery umbrella compartment 5 with screws and adjust it to the initial locking position. Tighten the nut by passing the umbrella hanging screw 17 through the recovery umbrella compartment 5. Then, connect the opening shaft 21 to the recovery umbrella compartment 5 with screws. Further, fix one end of the tower spring 20 to the recovery umbrella compartment 5 and the other end to the tower spring pressure plate 15. Connect the spring guide rod 13 to the recovery umbrella compartment 5 with screws and install the opening compression spring 18 along the spring guide rod 13. Then, press the tower spring pressure plate 15 into the preset groove of the recovery umbrella compartment 5 and install the recovery umbrella 19. Finally, connect the umbrella compartment cover 6 to the opening shaft 21 and push it in forcefully. Insert the umbrella compartment cover 6 into the initial locking rod 14, and leave a certain degree of interference between the cam joint of the initial locking rod 14 and the umbrella compartment cover 6 to complete the assembly of the recovery device.

[0045] During ground testing, without power, a normal force can be applied to the initial locking rod 14 through the ground testing port on the parachute compartment until the initial locking rod 14 is released from the parachute compartment cover 6 and unlocked. The opening status of the parachute is determined by the opening status after unlocking. The reliability of the opening status can be determined by multiple ground tests. After verification, the recovery device can be relocked by closing the parachute compartment cover 6 again and fastening the initial locking rod 14.

[0046] During the recovery process in the flight test, the parachute opening motor 1 is activated. The motor rocker arm 3 drives the connecting rod 4, which in turn rotates the unlocking hook 12. As the unlocking hook 12 rotates, the drive rod 11 moves accordingly. During this movement, the drive rod 11 rotates the initial locking rod 14. After the initial locking rod 14 rotates to a preset angle, it unlocks. After the initial locking rod 14 unlocks, the parachute canopy 6 rotates around the parachute shaft 21 under the action of the parachute opening spring 18. During the rotation, the parachute canopy 6 pulls the recovery parachute 19 out of the canopy. At the same time, the tower spring 20 pushes the tower spring pressure plate 15 to move along the preset groove. The recovery parachute 19 exits the canopy under the action of the tower spring pressure plate 15. After the parachute canopy 6 moves to a certain extent, it is thrown out. The guide parachute rope breaks during the traction process. After exiting the canopy, the recovery parachute 19 opens under the action of aerodynamic drag, completing the parachute opening.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A controllable parachute landing and recovery device for aircraft, characterized in that, Includes an umbrella opening motor (1), a motor bracket (2), a motor rocker arm (3), a connecting rod (4), a recovery umbrella compartment (5), an umbrella compartment cover (6), an umbrella compartment locking block torsion spring (9), a locking block rotating shaft (10), a drive rod (11), an unlocking hook (12), a spring guide rod (13), an initial locking rod (14), an umbrella opening shaft (21), an umbrella opening compression spring (18), an umbrella hanging screw (17), a recovery umbrella (19), a tower spring (20), and a tower spring pressure plate (15); The recovery parachute compartment (5) is an open box structure; a parachute shaft (21) is fixedly installed on one side of the opening of the recovery parachute compartment (5), and a protruding flat plate is installed on the other side opposite to the position of the parachute shaft (21); The motor bracket (2) is fixed on the protruding plate, and the umbrella opening motor (1) is fixed to the motor bracket (2); one end of the motor rocker arm (3) is connected to the output shaft of the umbrella opening motor (1), the other end of the motor rocker arm (3) is hinged to one end of the connecting rod (4), the other end of the connecting rod (4) is hinged to one end of the unlocking hook (12), and the other end of the unlocking hook (12) is rotatably connected to the locking block shaft (10); one end of the locking block shaft (10) is fixed on the motor bracket (2), and the umbrella compartment locking block torsion spring (9) is set on the locking block shaft (10); the umbrella compartment locking block torsion spring (9) is used to provide locking force for the initial locking rod (14); one end of the initial locking rod (14) is rotatably connected to the locking block shaft (10), and the other end is set as a cam part; one end of the drive rod (11) is fixed to the middle of the unlocking hook (12), and the other end is hinged to the cam part of the initial locking rod (14); The umbrella compartment cover (6) is configured as a semi-circular bushing on one side and suspended on the opening umbrella shaft (21). The other side of the umbrella compartment cover (6) is provided with a locking hook that cooperates with the cam part of the initial locking rod (14). The spring guide rod (13) is fixed on the outside of the recovery parachute compartment (5), and the opening parachute compression spring (18) is sleeved on the spring guide rod (13). One end of the opening parachute compression spring (18) is in contact with the recovery parachute compartment (5), and the other end is in contact with the inside of the parachute compartment cover (6). The tower spring pressure plate (15) and tower spring (20) are installed inside the recovery umbrella compartment (5); one end of the tower spring (20) is fixedly connected to the bottom of the recovery umbrella compartment (5), and the other end is fixedly connected to the tower spring pressure plate (15); the recovery umbrella (19) is placed between the tower spring pressure plate (15) and the umbrella compartment cover (6); The recovery umbrella compartment (5) has protruding lugs for installing the umbrella hanging screw (17), and the main umbrella rope of the recovery umbrella (19) is connected to the umbrella hanging screw (17); one end of the guide umbrella of the recovery umbrella (19) is connected to the main umbrella, and the other end of the guide umbrella is connected to the umbrella compartment cover (6).

2. The controllable parachute recovery device for aircraft as described in claim 1, characterized in that, The opening shaft (21) has a large diameter in the middle and a small diameter at both ends. The canopy cover (6) is suspended on the opening shaft (21) in the form of two semi-circular bushings and is limited to the left and right.

3. The controllable parachute recovery device for aircraft as described in claim 1, characterized in that, The motor bracket (2), motor rocker arm (3), connecting rod (4), and unlocking hook (12) form a parallelogram linkage mechanism.

4. The controllable parachute recovery device for aircraft as described in claim 1, characterized in that, The locking hook of the parachute canopy (6) has an L-shaped structure.

5. The controllable parachute recovery device for aircraft as described in claim 1, characterized in that, The inner wall of the recovery parachute compartment (5) is provided with a track to guide the tower spring pressure plate (15).

6. The controllable parachute recovery device for aircraft as described in claim 1, characterized in that, The spring guide rod (13) is a long rod structure with a thread on one end, and the spring guide rod (13) is connected to the recovery parachute compartment (5) by a thread.

7. The controllable parachute recovery device for aircraft as described in claim 5, characterized in that, After the initial locking lever (14) is unlocked, the canopy cover (6) rotates around the canopy shaft (21) and disengages from the canopy shaft (21) after rotating to the corresponding angle.

8. The controllable parachute recovery device for aircraft as described in claim 7, characterized in that, After the parachute compartment cover (6) is detached, the recovery parachute (19), the tower spring pressure plate (15) and the tower spring (20) are released from their constraints. The tower spring (20) drives the tower spring pressure plate (15) to push the recovery parachute (19) out of the recovery parachute compartment (5) along the inner wall track of the recovery parachute compartment (5). At the same time, the parachute compartment cover (6) pulls the recovery parachute (19) out of the compartment during the detachment process.

9. The controllable parachute recovery device for aircraft as described in claim 8, characterized in that, After the recovery parachute (19) exits the cabin, its guide parachute opens under the action of aerodynamic drag. Then the guide parachute drives its main parachute to open. After the main parachute opens, the connection between the guide parachute and the main parachute is disconnected.

10. The controllable parachute recovery device for aircraft as described in claim 1, characterized in that, The canopy cover (6) has a manual unlocking notch at the locking hook, which is used to manually release the initial locking bar (14) from the constraint of the canopy cover (6).

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