Adjusting mechanism for anti-clamping function of ventilation grille of aircraft environment control system

Abstract

The invention discloses an adjusting mechanism for an anti-clamping function of a ventilation grille of an aircraft environment control system. The adjusting mechanism comprises a sliding block cushion, a sliding block, a stop block cushion, a stop block and an adjusting screw. The sliding block cushion is installed in an inner cavity of the sliding block, one end of the check block cushion is installed in an installation groove of the check block, the other end of the check block cushion is clamped in a guide groove of the outer-layer blade at the same time, the outer-layer blade is oppositely clamped and held tightly through the check block cushion in the check block and the sliding block cushion in the sliding block, and when the sliding block is pushed, the sliding block cushion and the check block cushion slide in the axial direction of a rotating shaft of the outer-layer blade. Other outer-layer blades and inner-layer blades of the ventilation grid are driven to move, the air outlet direction of the blades of the ventilation grid is adjusted, the friction resistance is small in the adjusting process, the guide precision of the sliding blocks is high, and mechanical interference is not prone to being generated in the adjusting process.

Description

Technical Field

[0001] The present invention belongs to the technical field of ventilation equipment of the air distribution subsystem in the aircraft environmental control system, and particularly relates to a grille adjustment mechanism with optimized friction structure and guiding design. Background Art

[0002] The aircraft cockpit grille is the end accessory of the air distribution subsystem in the military aircraft environmental control system, directly facing the crew, and is the only accessory that interacts with the crew in the aircraft environmental control system. It is mainly used for the pilot to adjust the air outlet direction of the environmental control air. The aircraft cockpit grille has inner and outer layers of blades, and the rotating shafts of the inner and outer layers of blades are perpendicular to each other. By operating the movement of the slider, the air direction can be adjusted in four directions: up, down, left, and right. For the working principle and basic structure of the aircraft cockpit grille, reference can be made to the invention patent CN219192550U, June 16, 2023, Adjustable Vent.

[0003] In the process of the pilot adjusting the grille through the slider to achieve the air outlet direction, the following defects exist:

[0004] 1. Large frictional resistance: The close contact of the same metal material causes sticking due to material adhesion;

[0005] 2. Low guiding accuracy: Mechanical interference is likely to occur when the slider slides;

[0006] 3. There are gaps in the assembled parts: Mechanical interference is likely to occur when the slider slides.

[0007] To solve this problem, it is necessary to design an adjustment mechanism with an anti-sticking function to improve the comfort and operability of the cockpit. Summary of the Invention

[0008] The present invention aims to provide an adjustment mechanism for the grille of the aircraft environmental control system with an anti-sticking function, which has a simple structure, small frictional resistance during the adjustment process, high guiding accuracy of the slider, and is not prone to mechanical interference during the adjustment process, and can significantly reduce the risk of sticking when adjusting the grille.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] An adjustment mechanism for the grille of the aircraft environmental control system with an anti-sticking function, the grille includes an outer layer of blades and an inner layer of blades, and the adjustment mechanism includes:

[0011] A slider, the slider is slidably connected to the outer layer of blades, and the sliding direction is consistent with the axial direction of the rotating shaft of the outer layer of blades. There is at least one cavity in the slider;

[0012] Slider pad, the slider pad is assembled in the cavity of the slider, and one end of the slider pad is in close contact with the inner wall of the cavity of the slider, and the other end is in close contact with the outer narrow surface of the outer blade;

[0013] Stop block pad, the stop block pad is assembled in the cavity of the slider, and one end of the stop block pad is in close contact with the inner narrow surface of the outer blade, so that the stop block pad and the slider pad clamp the outer blade between the two;

[0014] Stop block, the stop block is detachably connected to the slider, one end of the stop block is placed in the cavity of the slider and in close contact with the end face of the stop block pad, and the other end extends to the outside of the slider and is connected to the inner blade;

[0015] The slider pad and the stop block pad are made of non-metallic self-lubricating materials.

[0016] As an alternative, the slider pad and the stop block pad are made of polytetrafluoroethylene.

[0017] As an alternative, the slider pad is provided with a groove, and is in close contact with the outer narrow surface of the outer blade through the groove.

[0018] As an alternative, a first guiding groove for restricting the rotation angle range of the inner blade is provided on the inner narrow surface of the outer blade, and the stop block pad is placed in the first guiding groove and is in close contact with the groove bottom surface of the first guiding groove.

[0019] As an alternative:

[0020] A second guiding groove is provided on the groove bottom surface of the first guiding groove;

[0021] One end of the stop block pad in contact with the groove bottom surface has a plurality of equally spaced and equally high protrusions, and the plurality of protrusions are arranged along the axial direction of the rotation shaft of the outer blade. The stop block pad is in close contact with the groove bottom surface of the second guiding groove through the ends of the plurality of protrusions.

[0022] As an alternative, an installation groove is provided on the surface of the stop block in close contact with the stop block pad, and the stop block pad is placed in the installation groove.

[0023] As an alternative, a threaded hole is provided on the stop block, and the threaded hole communicates with the installation groove, and an adjusting screw is placed in the threaded hole.

[0024] Furthermore, the adjusting mechanism for the anti-sticking function of the air grille of the aircraft environmental control system further includes a cushion block and a pressing screw. The cushion block is placed in the cavity of the slider and is in close contact with the stop block, and the end of the pressing screw presses on the cushion block after passing through the slider.

[0025] As an alternative:

[0026] There is a first gap between the slider and the outer surface of the outer blade;

[0027] There is a second gap between the stop block and the outer surface of the outer blade.

[0028] As an alternative, the surface of the slider located outside the outer blade further includes anti-slip protrusions.

[0029] Compared with the prior art, the present invention has the following characteristics:

[0030] (1) A sliding friction assembly is adopted: specifically, a slider pad and a stop block pad made of non-metallic and self-lubricating materials are in contact with the outer blade made of metal material between the slider and the stop block and the outer blade, reducing the adhesion and jamming problems caused by the large frictional resistance when the slider made of metal material contacts the outer blade made of metal material in the traditional design; in addition, the contact surface between the stop block pad and the outer blade adopts small surface contacts formed by the protruding ends of a plurality of spaced distributions to reduce the frictional force during the sliding process.

[0031] (2) A guiding structure is adopted: guiding grooves are designed on the narrow surfaces of the outer blade (except for the two axial ends of the outer blade, the two larger side surfaces of the outer blade in terms of surface area are wide surfaces, and the two upper and lower end surfaces with smaller surface areas are narrow surfaces, where the one far from the inner blade is the outer narrow surface and the one close to the inner blade is the inner narrow surface, and in the present invention, the two narrow surfaces are respectively in contact with the slider pad and the stop block pad), so that the stop block pad can slide along the guiding grooves. (3) A tightness adjustment structure is assembled: an adjusting screw is designed on the stop block. After the stop block pad and the outer blade are assembled and are loose, the stop block pad is tightened against the outer blade by adjusting the screw. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the air grille of the aircraft environmental control system;

[0033] Figure 2 It is included Figure 1 A sectional view in the Y direction of the position of the anti-jamming function adjusting mechanism of the air grille of the aircraft environmental control system including the area A;

[0034] Figure 3 A sectional view in the X direction of the position of the anti-jamming function adjusting mechanism of the air grille of the aircraft environmental control system;

[0035] In the figure: 1 - outer blade, 2 - slider pad, 3 - slider, 4 - stop block pad, 5 - stop block, 6 - adjusting screw, 7 - spacer block, 8 - compression screw, 9 - first gap, 10 - second gap. Detailed Embodiment

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments. Without departing from the above technical idea of the present invention, all modifications, substitutions, and changes made according to common general knowledge and conventional means in the art are included in the scope of the present invention.

[0037] As Figures 1 to 3 shown, the air vent grille includes an outer vane 1 and an inner vane. The present invention designs an adjustment mechanism for the anti-jamming function of the air vent grille, which includes a slider 3, a slider pad 2, a stop pad 4, a stop 5, and an adjustment screw 6.

[0038] The slider 3 is slidably connected to the outer vane 1, and the sliding direction is the same as the axial direction (i.e., the axis direction) of the rotating shaft of the outer vane 1. There is a cavity inside the slider 3. The slider pad 2 is assembled in the cavity of the slider 3, and one end of the slider pad 2 is closely attached to the inner wall of the cavity of the slider 3, and the other end is closely attached to the outer narrow surface of the outer vane 1. The stop pad 4 is assembled in the cavity of the slider 3, and one end of the stop pad 4 is closely attached to the inner narrow surface of the outer vane 1, so that the stop pad 4 and the slider pad 2 clamp the outer vane 1 between them. The stop 5 is detachably connected to the slider 3. One end of the stop 5 is placed in the cavity of the slider 3 and is closely attached to the end face of the stop pad 4, and the other end extends to the outside of the slider 3 and is connected to the inner vane. The slider pad 2 and the stop pad 4 are made of non-metallic self-lubricating materials.

[0039] A groove ( Figure 3 the arc-bottom groove in Figure 3 ) is opened on the slider pad 2, and it is closely attached to the outer narrow surface of the outer vane 1 through the groove. A first guide groove for limiting the rotation angle range of the inner vane is opened on the inner narrow surface (the narrow surface close to the inner vane side) of the outer vane 1 (the two end positions of the first guide groove respectively correspond to the two limit positions for the slider 3 to adjust the rotation angle of the inner vane). The stop pad 4 is placed in the first guide groove and is closely attached to the bottom surface of the first guide groove. A second guide groove is opened on the bottom surface of the first guide groove. One end of the stop pad 4 in contact with the bottom surface has 3 equally spaced and equally high protrusions arranged along the rotating shaft direction of the outer vane 1. The stop pad 4 is closely attached to the bottom surface of the second guide groove through the ends of the 3 protrusions. An installation groove is opened on the surface of the stop 5 in contact with the stop pad 4. The stop pad 4 is placed in the installation groove, and the two side surfaces of the stop pad 4 are fitted to the side walls of the installation groove. A threaded hole is also opened on the stop 5 (specifically

[0040] When assembling the air grille of the aircraft environmental control system, insert the slider pad 2 into the slider 3 and insert the stopper pad 4 into the stopper 5. Clamp the outer blade 1 through the slider pad 2 and the stopper pad 4. When it cannot be clamped tightly, use the adjusting screw 6 to push the stopper pad 4 upward to make it clamp tightly. At the same time, in order to maintain flexible sliding, the slider pad 2 and the stopper pad 4 are processed with polytetrafluoroethylene materials.

[0041] In the above design, the slider 3 and the stopper 5 do not directly contact the outer blade 1. The outer blade 1 is clamped by the slider pad 2 and the stopper pad 4. The slider pad 2 and the stopper pad 4 are made of materials with self-lubricating effects. The stopper pad 4 can slide freely in the first guide groove and the second guide groove of the outer blade 1. The contact structure between the stopper pad 4 and the inner bottom surface of the first guide groove of the outer blade 1 is three convex structures similar to multiple feet.

[0042] As Figure 1 shown, in the figure, the slider 3 and the outer blade 1 are assembled with other parts of the air grille as a whole, and the positions of the slider 3 and the outer blade 1 are shown.

[0043] As Figure 2 shown, it is a schematic diagram of the overall structure of the outer blade 1, the slider pad 2, the slider 3, the stopper pad 4, the stopper 5 and the adjusting screw 6. The figure shows that the slider pad 2 is installed inside the slider 3, the stopper pad 4 is installed inside the stopper 5, and the adjusting screw 6 presses against the stopper pad 4 through the stopper 5; in addition, the contact between the stopper pad 4 and the guide groove of the outer blade 1 is a small surface contact (the contact area is reduced by the ends of three spaced convex structures), rather than a large surface contact.

[0044] As Figure 3 shown, it is a schematic diagram of the overall structure of the outer blade 1, the slider pad 2, the slider 3, the stopper pad 4, the stopper 5 and the adjusting screw 6. The figure shows that the slider pad 2 is installed inside the slider 3, the stopper pad 4 is installed inside the stopper 5, the support point of the stopper pad 4 is in the first guide groove of the outer blade 1, there is a first gap 9 between the slider 3 and the outer blade 1, and the first gap 9 enables the slider 3 not to directly contact the outer blade 1 when sliding relative to the outer blade 1, but through the slider block 2. There is a second gap 10 between the stopper 5 and the outer blade 1, and the second gap 10 enables the stopper 5 not to directly contact the outer blade 1, but to contact the outer blade 1 through the stopper pad 4. The stopper pad 4 and the slider pad 2 clamp the outer blade 1, and the adjusting screw 6 presses against the stopper pad through the stopper.

[0045] The above embodiments do not limit the protection scope of the present invention. Any deformation, modification or equivalent replacement made on the basis of the technical solution of the present invention shall fall within the protection scope of the present invention.

Claims

1. An adjusting mechanism for the anti-sticking function of the ventilation grille of an aircraft environmental control system. The ventilation grille includes an outer layer of blades (1) and an inner layer of blades, characterized in that The adjusting mechanism includes: A slider (3), which is slidably connected to the outer blade (1), and the sliding direction is consistent with the axial direction of the rotating shaft of the outer blade (1). There is at least one cavity inside the slider (3); A slider pad (2), which is assembled in the cavity of the slider (3), and one end of the slider pad (2) is closely attached to the inner wall of the cavity of the slider (3), and the other end is closely attached to the outer narrow surface of the outer blade (1); A stop pad (4), which is assembled in the cavity of the slider (3), and one end of the stop pad (4) is closely attached to the inner narrow surface of the outer blade (1), so that the stop pad (4) and the slider pad (2) clamp the outer blade (1) between the two; A stop (5), which is detachably connected to the slider (3). One end of the stop (5) is placed in the cavity of the slider (3) and is closely attached to the end face of the stop pad (4), and the other end extends to the outside of the slider (3) and is connected to the inner blade; The slider pad (2) and the stop pad (4) are made of non-metallic self-lubricating materials.

2. The adjusting mechanism for preventing jamming of the air intake grille of an aircraft environmental control system according to claim 1, characterized in that: The slider pad (2) and the stop pad (4) are made of polytetrafluoroethylene.

3. The adjusting mechanism for preventing jamming of the air intake grille of an aircraft environmental control system according to claim 1, characterized in that: The slider pad (2) is provided with grooves, and is closely attached to the outer narrow surface of the outer blade (1) through the grooves.

4. The adjusting mechanism for preventing jamming of the ventilation grille of an aircraft environmental control system according to claim 1, wherein: A first guiding groove for restricting the rotation angle range of the inner blade is opened on the inner narrow surface of the outer blade (1). The stop pad (4) is placed in the first guiding groove and is closely attached to the groove bottom surface of the first guiding groove.

5. The adjusting mechanism for preventing jamming of the air grille of the aircraft environmental control system according to claim 4, characterized in that: A second guiding groove is opened on the groove bottom surface of the first guiding groove; One end of the stop pad (4) in contact with the groove bottom surface has a plurality of equally spaced and equally high protrusions arranged along the axial direction of the rotating shaft of the outer blade (1). The stop pad (4) is closely attached to the groove bottom surface of the second guiding groove through the ends of the plurality of protrusions.

6. The adjusting mechanism for preventing jamming of the ventilation grille of an aircraft environmental control system according to claim 1, characterized in that: An installation groove is opened on the surface of the stop (5) in close contact with the stop pad (4), and the stop pad (4) is placed in the installation groove.

7. The adjusting mechanism for preventing jamming of the air intake grille of an aircraft environmental control system according to claim 6, characterized in that: A threaded hole is opened on the stop (5), and the threaded hole communicates with the installation groove. An adjusting screw (6) is placed in the threaded hole.

8. An adjusting mechanism for preventing jamming of the air inlet grille of an aircraft environmental control system according to claim 1, characterized in that: It further includes a spacer block (7) and a pressing screw (8). The spacer block (7) is placed in the cavity of the slider (3) and is in close contact with the stop (5). The end of the pressing screw (8) presses against the spacer block (7) after passing through the slider (3).

9. The adjusting mechanism for preventing jamming of the air grille of the aircraft environmental control system according to claim 1, characterized in that: There is a first gap (9) between the slider (3) and the outer surface of the outer blade (1); There is a second gap (10) between the stop (5) and the outer surface of the outer blade (1).

10. The adjusting mechanism for the anti-sticking function of the ventilation grille of an aircraft environmental control system according to claim 1, characterized in that: The surface of the slider (3) located outside the outer blade (1) further includes anti-slip protrusions.

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