Side sliding type self-closing covering cap mechanism

Abstract

The utility model belongs to the field of aircraft design, and particularly relates to a sideslip type self-closing covering cap mechanism. In order to meet the structural appearance integrity and structural sealing performance of the aircraft, the covering cap system is required to have a driving function to overcome external carrier aerodynamic force to ensure closing of the covering cap. The utility model provides a sideslip type self-closing covering cap mechanism, which is used for closing and sealing an opening of an aircraft shell after a plug is separated, and comprises a thrust torsion spring, a covering cap, a sealing ring and a rotating shaft, the opening cover is sleeved on the rotating shaft, a boss consistent with the opening in size is arranged at the outer end of the opening cover, and a sealing ring is mounted on the lower table surface of the boss; a thrust torsion spring is installed between the covering cap and the rotating shaft and used for applying torque and thrust to the covering cap. The structure is simple, operation is convenient, cost is low, the automatic closing function is achieved, and the structural appearance integrity and sealing performance can be guaranteed; the device can be applied to automatic closing and shape-maintaining sealing requirements of folding covering caps of various aircrafts.

Description

Technical Field

[0001] This utility model belongs to the field of aircraft design, specifically relating to a side-sliding self-closing cover mechanism. Background Technology

[0002] After the plug is separated, in order to ensure the integrity of the aircraft's structural shape and the airtightness, the hatch system of the aircraft separation device is required to have a driving function to overcome the external aerodynamic forces to ensure the hatch is closed. At the same time, it is also required to have a sealing function after closure. In particular, the hatch closure method is required to reduce the external aerodynamic load, make closure easy, and ensure ease of use and low cost.

[0003] Currently, folding mechanisms for the lid can generally be divided into two categories: flip-top and linear folding. Flip-top lids can basically maintain the integrity of the structural shape after closure, but when flipping at a large angle, the pivot needs to be exposed on the outer surface of the structure, and it is significantly affected by aerodynamic forces. Linear folding mechanisms can meet the needs of small driving forces, but it is difficult to guarantee the integrity of the structural shape.

[0004] Furthermore, the driving methods can be mainly divided into three categories: torsion spring mechanical method, motor servo drive method, and pyrotechnic drive method. Among them, the torsion spring mechanical method has the lowest cost and relatively high reliability; the other two methods have higher costs and relatively complex structures. Therefore, there is a need for a folding cap that is simple in structure, easy to use, and low in cost, while also being easy to close and ensuring the integrity of the structural shape and its airtightness. Utility Model Content

[0005] The side-sliding self-closing cover mechanism of this utility model combines a thrust torsion spring with a translational cover to achieve the purpose of ensuring both the integrity of the shape and the sealing performance.

[0006] This utility model proposes a side-sliding self-closing cover mechanism for sealing the aircraft shell opening after the plug is separated. The mechanism includes a thrust torsion spring, a cover, a sealing ring, and a rotating shaft.

[0007] The inner side of the housing has a pivot near the opening. The cover is fitted onto the pivot and has a boss at its outer end that matches the size of the opening. A sealing ring is installed on the lower surface of the boss. A thrust torsion spring is installed between the cover and the pivot. The thrust torsion spring is used to apply torque and thrust to the cover.

[0008] Advantageously, ball bearings are also installed inside the housing, in the area where the cover passes.

[0009] Advantageously, a stop pin for limiting the opening cover is also installed inside the housing.

[0010] Advantageously, the lower end of the shaft has an annular structure, and the lower end of the thrust torsion spring is fixedly mounted on the annular structure.

[0011] Advantageously, the lower end face of the cover is fixedly installed with the upper end of the thrust torsion spring.

[0012] Advantageously, the upward rotation of the thrust torsion spring is consistent with the opening rotation direction of the cover.

[0013] The cover has rotational and translational degrees of freedom around its central axis; the thrust torsion spring has rotational torque and axial translational elastic force as driving forces. By utilizing the rotational and translational degrees of freedom of the cover, the cover can be rotated to close, and its translational displacement can maintain the structural shape and sealing function.

[0014] Beneficial effects: This side-sliding self-closing cover mechanism has a simple structure, is easy to operate, and has a low cost. It achieves automatic closing function while ensuring the integrity of the structural shape and sealing performance. It can be applied to the automatic closing and sealing requirements of various aircraft folding covers. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a side-sliding self-closing lid.

[0016] Figure 2 This is a schematic diagram of the forces acting on the lid before it closes.

[0017] Figure 3 This is a schematic diagram of the state after closure;

[0018] Figure 4 This is a schematic diagram of the sealing assembly.

[0019] 1. Thrust torsion spring; 2. Ball bearing; 3. Cover; 4. Housing; 5. Stop pin; 6. Sealing ring; 7. Shaft Detailed Implementation

[0020] See Figure 1 A rotating shaft 7 is fixedly installed at a suitable position inside the housing 4. The cover 3 has a through hole in its edge area, which can be fitted onto the rotating shaft 7. The upper end of the cover 3 has a boss that can extend into the opening of the housing, and the shape of the boss matches the opening. A thrust torsion spring 1 is located between the lower end of the cover 3 and the rotating shaft 7. The thrust torsion spring 1 is used to apply thrust and torque loads. In particular, the upward helical direction of the thrust torsion spring 1 is consistent with the opening rotation direction of the cover. When the cover 1 is rotating open, the thrust decreases; when the cover 1 is rotating closed, the thrust increases, achieving easy opening and strong sealing.

[0021] A sealing ring 6 is installed on the lower platform of the boss facing the inner side of the housing 3, which can achieve water sealing even when the thrust load of the cover is small; a ball bearing 2 is installed on the inner surface of the housing 4 to facilitate the sliding of the cover 3 during opening or closing and reduce friction. A stop block 5 is used to prevent the cover 3 from over-positioning during closing.

[0022] This utility model adopts the dual load principle of mechanical motion and thrust torsion spring, and its working process is as follows:

[0023] Working process: The method of opening the cover 3 is to press the cover 3 and then rotate the cover 3 to open the cover 3. Inserting the cable plug will form a stop. When the cable plug is separated, the stop of the cover 3 disappears. Under the torque M of the thrust torsion spring 1, the cover 3 begins to close around the rotating shaft 7. After the cover 3 rotates to the stop pin position, it is pushed upward under the thrust F of the thrust torsion spring 1 to achieve the closing and sealing of the cover 3 and maintain its shape.

Claims

1. A side-sliding self-closing cover mechanism for closing and sealing the aircraft shell opening after the plug is separated, characterized in that: The mechanism includes a thrust torsion spring (1), a cover (3), a sealing ring (6), and a rotating shaft (7), wherein The inner side of the housing (4) has a pivot (7) in the area near the opening. The cover (3) is fitted on the pivot (7) and has a boss at the outer end that matches the size of the opening. A sealing ring (6) is installed on the lower surface of the boss. A thrust torsion spring (1) is installed between the cover (3) and the pivot (7). The thrust torsion spring (1) is used to apply torque and thrust to the cover (3).

2. The side-sliding self-closing cover mechanism according to claim 1, characterized in that: Ball bearings (2) are also installed inside the housing and in the area through which the cover (3) passes.

3. The side-sliding self-closing cover mechanism according to claim 1, characterized in that: A stop pin (5) for limiting the opening cover (3) is also installed inside the housing.

4. The side-sliding self-closing cover mechanism according to claim 1, characterized in that: The lower end of the rotating shaft (7) has an annular structure, and the lower end of the thrust torsion spring (1) is fixedly installed on the annular structure.

5. The side-sliding self-closing cover mechanism according to claim 4, characterized in that: The lower end face of the cover (3) is fixedly installed on the upper end of the thrust torsion spring (1).

6. The side-sliding self-closing cover mechanism according to claim 1, characterized in that: The upward rotation direction of the thrust torsion spring (1) is consistent with the opening rotation direction of the cover (3).

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