Aircraft environment control system ventilation grille locking structure

Abstract

The utility model discloses a ventilation grille locking structure of an aircraft environment control system. The ventilation grille locking structure comprises an upper top plate, a reed and a mounting plate. One side of the upper top plate is provided with a regular polygon prism which is coaxial with a rotating shaft of the inner-layer blade, the surface of the mounting plate is provided with a circular groove and a limiting groove, the reed is bent in a regular polygon shape and is mounted in the circular groove, one vertex of the regular polygon is broken to form two lugs, and the lugs are arranged in the limiting groove. And one end or two ends of the rotating shaft of the inner-layer blade of each ventilating grille are provided with a locking structure consisting of an upper top plate, a reed and a mounting plate, so that the inner-layer blade can be effectively prevented from self-deflection due to vibration of an airplane, the stability of the ventilating direction is kept, and the reliability of the ventilating grille is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air distribution subsystems in an aircraft environmental control system, and in particular relates to a ventilation grille locking structure. Background Art

[0002] The aircraft cabin ventilation grille is the terminal accessory of the air distribution subsystem in the environmental control system of military aircraft. It is directly facing the crew and is the only accessory in the aircraft environmental control system that interacts with the crew. The ventilation grille is mainly used by the pilot to adjust the air outlet direction of the environmental control wind. The inner blades of the grille are used to adjust the air outlet direction up and down, while the outer blades are used to adjust the air outlet direction left and right. However, after the pilot adjusts the air outlet direction of the ventilation grille, due to the large overall vibration of the aircraft during flight, the inner blades of the grille may automatically deflect due to the lack of a locking structure, and the purpose of the grille to adjust the wind direction is lost. In order to solve this problem, it is necessary to design a grille locking structure suitable for the inner blades to ensure the stable position of the inner blades and improve the comfort of the cabin. Summary of the invention

[0003] In view of the problems described in the background technology, the utility model aims to provide a ventilation grille locking structure for an aircraft environmental control system, which can effectively prevent the inner blades from self-rotating and solve the problem of self-deflection of the inner blades caused by aircraft vibration.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] The ventilation grille locking structure of the aircraft environmental control system, wherein the ventilation grille is mainly composed of outer blades and inner blades, and the rotation axis of the outer blades is perpendicular to the rotation axis of the inner blades. The ventilation grille locking structure includes:

[0006] An upper top plate, the upper top plate is arranged at least at one end of the rotating shaft where the inner blades are located, and is located on the same side of the plurality of outer blades, and a regular polygonal prism structure coaxial with the rotating shaft where the inner blades are located is provided on the end surface of the upper top plate away from the outer blades;

[0007] A reed, wherein the reed is in the shape of a regular polygon, and the number of sides of the regular polygon is equal to the number of side edges of the regular polygonal prism on one side of the end surface of the upper top plate, and the reed is broken at a vertex of the regular polygon and bent to form two ears;

[0008] The mounting plate is located on a side of the upper top plate on which a regular polygonal column structure is provided, and a groove and a limit groove are provided on the end face of the mounting plate corresponding to the upper top plate, the reed is placed in the groove and the two ears are placed in the limit groove, and the inner wall profile of the groove is sufficient to contact only the vertices of the polygon corresponding to the reed, and the mounting plate is assembled on the end face of the ventilation grille.

[0009] As an option, the spring leaf is a regular octagon, and the regular polygonal prism structure of the upper top plate is a regular octagonal prism.

[0010] As an option, the groove of the mounting plate is a circular groove, a limiting groove away from the center of the circular groove is opened on the inner wall of the circular groove, and the inner diameter of the circular groove is equal to the diameter of the circumscribed circle of the polygon corresponding to the spring leaf.

[0011] As an option, the mounting plate is mounted on the ventilation grille by means of screws.

[0012] Compared with the prior art, the utility model has the following characteristics:

[0013] (1) To solve the problem that the inner blades of the ventilation grille need to be locked, it is only necessary to add a spring sheet, a regular polygonal column structure of the upper top plate, and a mounting plate with a limit groove and a groove at one or both ends of the inner blade in the direction of the rotation axis. The implementation method is simple and does not affect the original outer blades;

[0014] (2) The locking method is simple, reliable and stable. It makes full use of the fact that there is no deformation space at the contact point between the spring and the groove, but there is elastic deformation space between any two adjacent contact points to generate elastic deformation force as resistance to rotation, thereby achieving position locking. At the same time, there is a significant damping feeling when rotating the inner blade. (3) The locking position of the inner blade can be changed by adjusting the number of polygonal edges corresponding to the spring and the number of side edges of the regular polygonal prism structure. The anti-rotation structure of the spring itself is simple and easy. For example, a regular hexagonal spring has 6 locking positions, while a regular octagonal spring has 8 locking positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the ventilation grille of the aircraft environmental control system (the outer blades that can be adjusted left and right can be seen in the figure);

[0016] Figure 2 This is an exploded view of the locking position of the ventilation grille of the aircraft environmental control system;

[0017] Figure 3 Another exploded view of the locking position of the ventilation grille of the aircraft environmental control system;

[0018] Figure 4 It is a cross-sectional view of the locked position of the ventilation grille of the aircraft environmental control system;

[0019] In the figure: 1-top plate; 2-spring; 3-mounting plate. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0021] like Figure 1 to Figure 4 The figure shows the design scheme of the locking structure of the ventilation grille of the aircraft environmental control system: it includes an upper top plate 1, a spring 2 and a mounting plate 3. The spring 2 is bent in a regular octagon and is broken at one vertex of the regular octagon. The two ends of the spring 2 at the break form a pair of spaced ears. A through hole is provided on the upper top plate 1. The rotating shaft of the inner blade passes through the through hole and is coaxially connected to the regular octagonal prism on one side of the upper top plate 1. A circular groove is provided on the surface of the mounting plate 3 corresponding to the regular octagonal prism. There is a limiting groove on the inner wall of the circular groove. The circular groove serves as the installation position of the spring 2. The regular octagonal spring 2 is inscribed on the inner wall circumference of the circular groove, and a pair of ears extend into the limiting groove.

[0022] The locking function of the aircraft environmental control system ventilation grille locking structure is implemented as follows:

[0023] like Figure 4 , first install the regular octagonal reed 2 into the circular groove of the mounting plate 3. During installation, a pair of ears of the reed 2 needs to be installed into the limiting groove in the circular groove of the mounting plate 3 to prevent the reed 2 from rotating with the regular octagonal prism structure of the upper top plate 1 during use. This is because a pair of ears are located at the vertex disconnection of the regular octagon, and under the action of elasticity, the two ears tend to move away from or separate from each other, causing the two ears to be pressed against the groove wall of the limiting groove respectively, thereby providing a larger pressing force, and then generating a larger friction force with the groove wall of the limiting groove. When the reed 2 has a tendency to rotate, whether counterclockwise or clockwise, the two ears will tend to get close, fit together, and then rotate together, but they cannot leave the limiting groove due to the obstruction of the limiting groove (the length of the two ears needs to be calculated based on the numerical value of the rotational torque) until the regular octagonal prism rotates an inner angle relative to the reed 2. The key point of designing the reed 2 is that the ear of the reed 2 needs to be located at a vertex of the polygon corresponding to the reed 2, and the key point of designing the circular groove and the limit groove of the mounting plate 3 is that the groove width and depth should be sufficient to limit the sliding and separation of the ear of the reed 2.

[0024] After the regular octagonal prism of the upper top plate 1 is assembled into the spring 2, when one side of the spring 2 is parallel to one side of the regular octagonal prism, the grille is in a normal locking state. When the rotating shaft of the inner blade drives the regular octagonal prism on one side of the upper top plate 1 to rotate due to the vibration of the aircraft, the side edge of the regular octagonal prism will squeeze one side of the spring 2. Since there is a deformation space between this edge and the inner wall of the circular groove, this edge will undergo elastic deformation and then generate elastic force to prevent the regular octagonal prism from continuing to rotate, thereby playing a locking role. When the direction of the inner blade needs to be adjusted, when the torque applied by the operator to the rotating shaft of the inner blade is greater than the torque of the elastic force generated by the spring 2 on the regular octagonal prism, the inner blade switches to the next stable position. At this time, since the spring 2 cannot rotate, the regular octagonal prism rotates relative to the spring 2 and the side edge enters the octagonal inner angle position corresponding to the next spring 2, and enters the locking state again.

[0025] like Figure 1 , which is a schematic diagram of the position of the locking structure on the ventilation grille. In the figure, two upper plates 1 and two ends of the ventilation grille are assembled into a whole by screws. The figure shows the positions of the upper plates 1 and the mounting plate 3.

[0026] like Figure 2 , which is a schematic diagram of the reed 2 installed in the circular groove of the mounting plate 3 , and shows the two ears of the reed 2 installed in the limiting grooves in the mounting plate 3 .

[0027] like Figure 3 As shown, a regular octagonal prism on one side of the upper top plate 1 coaxially connected to the inner blade shaft is located between the upper top plate 1 and the mounting plate 3 .

[0028] like Figure 4 The figure shows a cross-sectional view of the upper top plate 1, the spring 2 and the mounting plate 3 when they are assembled as one. In the figure, the regular octagonal prism of the upper top plate 1 and the regular octagon of the spring 2 are overlapped and in a locked state. The spring 2 is installed in the circular groove of the mounting plate 3, and the two ears at the vertices of the regular octagon are also placed in the limit groove. Since the ventilation grille is assembled as a whole with the upper top plate 1 and the mounting plate 3, the inner blades cannot rotate by themselves, so the ventilation grille is locked.

[0029] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A locking structure for a ventilation grille of an aircraft environmental control system, wherein the ventilation grille is mainly composed of outer blades and inner blades, and the rotation axis of the outer blades is perpendicular to the rotation axis of the inner blades, and is characterized in that: The ventilation grille locking structure includes: An upper top plate (1), the upper top plate (1) being arranged at least at one end of the rotating shaft where the inner blades are located, and being located on the same side of the plurality of outer blades, and having a regular polygonal prism structure coaxial with the rotating shaft where the inner blades are located on one side of the end surface of the upper top plate (1) away from the outer blades; A reed (2), the reed (2) being in the shape of a regular polygon, and the number of sides of the regular polygon being equal to the number of side edges of the regular polygonal prism on one side of the end face of the upper top plate (1), the reed (2) being broken at a vertex of the regular polygon and bent to form two lugs; The mounting plate (3) is located on a side of the upper top plate (1) provided with a regular polygonal column structure, and a groove and a limit groove are provided on the end surface of the mounting plate (3) corresponding to the upper top plate (1), the reed (2) is placed in the groove and the two ears are placed in the limit groove, and the inner wall profile of the groove is sufficient to contact only the vertices of the polygon corresponding to the reed (2), and the mounting plate (3) is assembled on the end surface of the ventilation grille.

2. The aircraft environmental control system ventilation grille locking structure according to claim 1, characterized in that: The spring leaf (2) is a regular octagon, and the regular polygonal prism structure of the upper top plate (1) is a regular octagonal prism.

3. The aircraft environmental control system ventilation grille locking structure according to claim 1, characterized in that: The groove of the mounting plate (3) is a circular groove, and a limiting groove away from the center of the circular groove is opened on the inner wall of the circular groove. The inner diameter of the circular groove is equal to the diameter of the circumscribed circle of the polygon corresponding to the spring leaf (2).

4. The aircraft environmental control system ventilation grille locking structure according to claim 1, characterized in that: The mounting plate (3) is assembled on the ventilation grille by means of screws.

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