Photoelectric platform lifting and hatch door closing and opening linkage mechanism

Abstract

A linkage mechanism for the lifting and lowering of a photoelectric platform and the opening and closing of a hatch includes a cable assembly, a motor-driven concentric pulley, a photoelectric platform, a hatch guide rail, and a hatch. The motor-driven concentric pulley comprises a small-diameter pulley, a large-diameter pulley, and a rotary motor. One end of the hatch is connected to the small-diameter pulley via the cable assembly, and the other end is connected to the hatch guide rail. The photoelectric platform is connected to the large-diameter pulley via the cable assembly. The rotary motor is connected to both the small-diameter and large-diameter pulleys, and the diameter ratio of the small-diameter and large-diameter pulleys is the same as the ratio of the lifting stroke of the photoelectric platform to the movement stroke of the hatch guide rail. A single power source is used to achieve both hatch opening and photoelectric platform lifting, effectively saving costs, reducing weight, and decreasing energy demand.

Description

Technical Field

[0001] This invention relates to the field of aircraft structural technology, and in particular to a linkage mechanism for the lifting and lowering of an optoelectronic platform and the opening and closing of a cabin door. Background Technology

[0002] Electro-optical platforms, as primary reconnaissance equipment, have become common on aircraft. The overall layout of electro-optical platforms on an aircraft not only significantly impacts its reconnaissance missions but also affects various aspects of the aircraft, including aerodynamics and stealth. Generally, low-speed, non-stealth UAVs use canopy-less elevators for their electro-optical platforms. This design lacks stealth characteristics and, due to aerodynamic noise disturbances during flight, is unsuitable for high-speed flight. Figure 1 As shown;

[0003] To achieve high speed and stealth capabilities, optoelectronic platforms can also be implemented in non-elevating configurations, such as internal or external platforms. Internal platforms house the optoelectronic equipment within the fuselage; however, this type of equipment has a limited field of view and requires supplementary equipment. The F-117 has internal sensors mounted in its nose, with conformal windows covered by a fine grille for electromagnetic shielding. Elevating optoelectronic equipment is also installed on the lower part of the forward fuselage to compensate for the limited field of view. Figure 2 As shown;

[0004] High-speed, stealth aircraft utilize external electro-optical platforms in the form of optical windows. The F-35 fighter jet's sensors are housed within these windows. To ensure optical performance, the windows are made of sapphire glass with a surface coating, providing a 360-degree omnidirectional field of view without compromising the aircraft's stealth capabilities. However, sapphire glass is expensive and heavy. Figure 3 As shown;

[0005] To meet the detection requirements of high-speed, stealth aircraft optoelectronic sensors, while avoiding the limited field of view of built-in non-elevating optoelectronic platforms and the cost and weight constraints of external optical windows, the aircraft uses an optoelectronic platform deployment and retrieval mechanism with a hatch (such as...). Figure 4 As shown in the figure, the right-side downward-looking infrared detection system of the landing gear bay is an example of this type of retraction mechanism. Both the equipment and the door use independent retraction mechanisms, which means that at least two sets of power drive mechanisms need to be specially configured on the aircraft, thereby increasing the structural weight and energy consumption of the aircraft. Summary of the Invention

[0006] The technical problem solved by this invention is to provide a linkage mechanism for the lifting and lowering of an optoelectronic platform and the opening and closing of a hatch, so as to solve the problems in the background art mentioned above.

[0007] The technical problem solved by this invention is achieved by the following technical solution:

[0008] A linkage mechanism for the lifting and lowering of a photoelectric platform and the opening and closing of a hatch includes a cable group, a motor-driven concentric pulley, a photoelectric platform, a hatch guide rail, and a hatch. The motor-driven concentric pulley includes a small-diameter pulley, a large-diameter pulley, and a rotary motor. One end of the hatch is connected to the small-diameter pulley via the cable group, and the other end of the hatch is connected to the hatch guide rail. The photoelectric platform is connected to the large-diameter pulley via the cable group. The rotary motor is connected to both the small-diameter and large-diameter pulleys, and the diameter ratio of the small-diameter and large-diameter pulleys is the same as the ratio of the lifting stroke of the photoelectric platform to the movement stroke of the hatch guide rail.

[0009] In this invention, the photoelectric platform is provided with fasteners for fixing the wire group.

[0010] In this invention, the hatch is provided with a locking element for securing the cable assembly.

[0011] In this invention, the small-diameter pulley and the large-diameter pulley share a common rotating shaft, driven by a rotary motor to rotate the concentric pulley. The diameters of the small-diameter pulley and the large-diameter pulley correspond to the motion stroke of the photoelectric platform and the motion stroke of the door guide rail retraction, so as to ensure the synchronization of the door opening and the photoelectric platform falling.

[0012] In this invention, during the descent of the photoelectric platform, a rotary motor drives a concentric pulley to rotate. The concentric pulley drives the photoelectric platform and the hatch simultaneously through a set of leads. The photoelectric platform moves downward due to gravity, while the hatch is pulled upward along the hatch guide rail by the leads.

[0013] During the lifting process of the photoelectric platform, the rotary motor drives the concentric pulley to rotate. The concentric pulley drives the photoelectric platform and the hatch simultaneously through the cord assembly. Due to gravity, the hatch slides down the hatch guide rail, and the photoelectric platform is pulled upward by the cord assembly, thus realizing the linkage between the lifting and lowering of the photoelectric platform and the opening and closing of the hatch.

[0014] Beneficial effects: This invention provides a linkage mechanism for the lifting and lowering of a photoelectric platform and the opening and closing of a hatch. It uses a single power source to realize the opening of the hatch and the lifting and lowering of the photoelectric platform, effectively saving costs, reducing weight, and reducing energy demand. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation of an optoelectronic platform on a conventional aircraft.

[0016] Figure 2 A schematic diagram of the installation of the forward-looking infrared detection system in front of the cockpit.

[0017] Figure 3 This is a schematic diagram of an external optoelectronic platform installed using a light window.

[0018] Figure 4 A schematic diagram showing the installation of the downward-looking infrared detection system on the right side of the aircraft landing gear bay.

[0019] Figure 5 This is a schematic diagram of the retracted state of the linkage mechanism in a preferred embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of the linkage mechanism in the lowered state in a preferred embodiment of the present invention.

[0021] Figure 7 This is a left view of a preferred embodiment of the present invention.

[0022] Figure 8 This is a cross-sectional view of a motor-driven concentric pulley in a preferred embodiment of the present invention. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0024] See Figures 5-8 The illustrated photoelectric platform lifting and hatch retraction linkage mechanism includes a cable group 1, a motor-driven concentric pulley 2, a photoelectric platform 3, a hatch guide rail 4, a hatch 5, a small-diameter pulley 6, a large-diameter pulley 7, and a rotary motor 8. The motor-driven concentric pulley 2 includes the small-diameter pulley 6, the large-diameter pulley 7, and the rotary motor 8. One end of the hatch 5 is connected to the small-diameter pulley 6 via the cable group 1, and the other end of the hatch 5 is connected to the hatch guide rail 4. The photoelectric platform 3 is connected to the large-diameter pulley 7 via the cable group 1. The rotary motor 8 is connected to both the small-diameter pulley 6 and the large-diameter pulley 7, and the diameter ratio of the small-diameter pulley 6 to the large-diameter pulley 7 is the same as the ratio of the lifting stroke of the photoelectric platform 3 to the movement stroke of the hatch guide rail 4.

[0025] In this embodiment, the photoelectric platform 3 is provided with fasteners for fixing the lead group 1.

[0026] In this embodiment, the hatch 5 is provided with a locking device for securing the cable assembly 1.

[0027] In this embodiment, the small-diameter pulley 6 and the large-diameter pulley 7 share a rotating shaft, driven by a rotary motor 8, which rotates the concentric pulley 2. The pulleys of different diameters are connected to the photoelectric platform 3 and the hatch 5 respectively through the wire group 1. The diameter R1 of the small-diameter pulley 6 and the diameter R2 of the large-diameter pulley 7 correspond to the movement stroke of the photoelectric platform 3 and the movement stroke of the hatch guide rail 4 when it is retracted, so as to ensure the synchronization of the opening of the hatch 5 and the falling of the photoelectric platform 3.

[0028] In this embodiment, during the descent of the photoelectric platform, the rotary motor 8 drives the concentric pulley 2 to rotate. The concentric pulley 2 simultaneously drives the photoelectric platform 3 and the hatch 5 through the clue group 1. The photoelectric platform 3 moves downward due to gravity, and the hatch 5 is pulled upward along the hatch guide rail 4 by the clue.

[0029] The process of raising the photoelectric platform 3 is the opposite of the process of lowering it. The rotary motor 8 drives the concentric pulley 2 to rotate. The concentric pulley 2 drives the photoelectric platform 3 and the hatch 5 simultaneously through the clue group 1. The hatch 5 slides down along the hatch guide rail 4 due to gravity. The photoelectric platform 3 is pulled upward by the clue and retracted. The raising and lowering of the photoelectric platform is linked with the opening and closing of the hatch.

Claims

1. A linkage mechanism for the lifting and lowering of a photoelectric platform and the retraction and extension of a hatch, comprising a guide rail assembly, a motor-driven concentric pulley, a photoelectric platform, a hatch guide rail, and a hatch, characterized in that, The motor-driven concentric pulley includes a small-diameter pulley, a large-diameter pulley, and a rotary motor. One end of the hatch is connected to the small-diameter pulley via a wire assembly, and the other end of the hatch is connected to the hatch guide rail. The photoelectric platform is connected to the large-diameter pulley via a wire assembly. The rotary motor is connected to both the small-diameter pulley and the large-diameter pulley, and the ratio of the diameters of the small-diameter pulley and the large-diameter pulley is the same as the ratio of the lifting stroke of the photoelectric platform to the movement stroke of the hatch guide rail. During the descent of the photoelectric platform, the rotary motor drives the concentric pulley to rotate. The concentric pulley drives the photoelectric platform and the hatch simultaneously through the cord assembly. The photoelectric platform moves downward due to gravity, while the hatch is pulled upward along the hatch guide rail by the cord. During the lifting process of the photoelectric platform, the rotary motor drives the concentric pulley to rotate. The concentric pulley drives the photoelectric platform and the hatch simultaneously through the cord assembly. Due to gravity, the hatch slides down the hatch guide rail, and the photoelectric platform is pulled upward by the cord assembly, thus realizing the linkage between the lifting and lowering of the photoelectric platform and the opening and closing of the hatch.

2. The photoelectric platform lifting and hatch retraction linkage mechanism according to claim 1, characterized in that, The photoelectric platform is equipped with fasteners for securing the lead group.

3. The photoelectric platform lifting and hatch retraction linkage mechanism according to claim 1, characterized in that, The hatch is equipped with locking devices for securing the cable assembly.

4. The photoelectric platform lifting and hatch retraction linkage mechanism according to claim 1, characterized in that, The small-diameter pulley and the large-diameter pulley share a common rotating shaft.

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