Airborne parachuting cabin door capable of sliding upwards to be opened

Abstract

The invention belongs to the technical field of aircraft structure design, and particularly relates to an airborne parachuting cabin door capable of sliding upwards to be opened. The device comprises a cabin door body, a rectification wall plate and a sliding rail installed on the inner side of a cabin. The rectification wall plate serves as a part of the undercarriage fairing and has an aerodynamic shape matched with the undercarriage fairing, the top of the rectification wall plate is hinged to the outer wall of the cabin door body through a rotating shaft, and pulleys are arranged on the two sides of the bottom of the rectification wall plate and can slide on the rails. The outer wall of the cabin door body is further connected with the inner wall of the rectifying wall plate through a connecting rod, and the cabin door body is hinged to the connecting rod and provided with a torsional spring driving the connecting rod to deflect towards the cabin door body; the sliding rails extend inwards and upwards on the inner side of the cabin, the cabin door body can slide along the sliding rails, and in the sliding process, the bottom of the rectification wall plate slides along the rails to be attached to the cabin door body and then moves upwards along with the cabin door body till the cabin door is completely opened. Interference between the cabin door and the fuselage and fairing structure in the opening process is avoided, and the utilization rate of an aircraft cargo hold is increased.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aircraft structure design, and particularly relates to an air-drop parachute cabin door which is opened upward and slides into a cabin. BACKGROUND

[0002] The air-drop parachute cabin door is a device system arranged at a specific position of an aircraft fuselage to realize the function of personnel parachuting from the air and ensure the smoothness and safety of the parachuting channel. For a parachuting cabin door whose opening is arranged on the rear sidewall of the aircraft fuselage and overlaps with the fairing cover of the landing gear, the opening position of the cabin door is shown in FIG. 1. When such a cabin door is designed, the conventional opening mode of translational movement or fixed-axis rotation of the cabin door cannot meet the functional requirements, and the cabin door opening will interfere with the structure of the fuselage according to the conventional opening form design. Figure 1 SUMMARY

[0003] In order to solve the above problems, the present application provides an air-drop parachute cabin door which is opened upward and slides into a cabin, so as to avoid the interference between the cabin door and the structure of the fuselage and the fairing cover during the opening process of the cabin door.

[0004] The air-drop parachute cabin door which slides into a cabin according to the present application mainly comprises a cabin door body, a fairing wall plate and a slide rail installed on the inner side of the cabin.

[0005] The fairing wall plate is part of the landing gear fairing cover and has an aerodynamic shape adapted to the landing gear fairing cover. The width of the fairing wall plate is consistent with the width of the cabin door body. The top of the fairing wall plate is hinged to the outer wall of the cabin door body through a rotating shaft. The bottom of the fairing wall plate is provided with pulleys which can slide on the track. The track extends from the inner wall of the landing gear fairing cover to the outer wall of the cabin door body. The outer wall of the cabin door body is further connected to the inner wall of the fairing wall plate through a connecting rod. The cabin door body is hinged to the connecting rod and is provided with a torsional spring which drives the connecting rod to deflect towards the cabin door body.

[0006] The slide rail extends inward and upward on the inner side of the cabin. The cabin door body can slide along the slide rail. During the sliding process, the bottom of the fairing wall plate slides along the track to fit the cabin door body under the driving of the torsional spring and the connecting rod, and then moves upward with the cabin door body to completely open the cabin door.

[0007] Preferably, the connecting rod has two connecting rods which are arranged at positions close to the two sides between the cabin door body and the fairing wall plate.

[0008] Preferably, the air-drop parachute cabin door further comprises a cabin door lifting assistance mechanism which is connected to the cabin door body through a steel cable to provide upward tension of the cabin door body.

[0009] Preferably, the slide rail comprises a first group of slide rails for guiding the movement of the upper end of the cabin door body and a second group of slide rails for guiding the movement of the lower end of the cabin door body.​

[0010] Preferably, the upper end of the hatch body has a first locking mechanism, which is locked with the hatch closing locking device arranged on the first set of slide rails when the hatch body is closed.

[0011] Preferably, the lower end of the hatch body has a second locking mechanism, which is locked with the hatch opening locking device arranged on the second set of slide rails when the hatch body is opened.

[0012] The present application avoids the interference with the fuselage and fairing structure during the opening of the hatch, and improves the utilization rate of the aircraft cargo compartment. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic diagram of the hatch position.

[0014] Figure 2 is a schematic diagram of the outer side of the fuselage of a preferred embodiment of the present application, which is a parachute drop hatch opened upward into the cabin.

[0015] Figure 3 is a schematic diagram of the inner side of the fuselage of the embodiment shown in the present application. Figure 2

[0016] Figure 4 is a schematic diagram of the position relationship between the hatch body and the position fairing wall plate in the closed state of the hatch.

[0017] Figure 5 is a schematic diagram of the position relationship between the hatch body and the position fairing wall plate during the opening of the hatch.

[0018] Wherein, 1-hatch body, 2-fairing wall plate, 3-slide rail, 4-landing gear fairing, 5-hatch lifting assist mechanism, 6-hatch closing locking device, 7-hatch opening locking device, 21-pivot shaft, 22-pulley, 23-rail, 24-connecting rod, 25-torsional spring. DETAILED DESCRIPTION

[0019] To make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described in more detail below in combination with the drawings in the embodiments of the present application. In the drawings, the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.​

[0020] The present application provides a kind of to cabin upper slide opening air drop parachute cabin door, as shown in Figures 2-5 Mainly include cabin door body 1, fairing wallboard 2 and the slide rail 3 of installation in the cabin inner side;

[0021] The fairing wallboard 2 as a part of landing gear fairing 4, with the aerodynamic shape of adaptation landing gear fairing 4, the width of fairing wallboard 2 is consistent with the width of cabin door body 1, top is hinged in the outer wall of cabin door body 1 by pivot 21, bottom two sides are provided with pulley 22, pulley 22 can slide on track 23, the track 23 is extended to contact the outer wall of cabin door body 1 by the inner wall of landing gear fairing 3;The outer wall of cabin door body 1 is also connected to the inner wall of fairing wallboard 2 by connecting rod 24, cabin door body 1 is hinged with connecting rod 24, and is provided with torsional spring 25 for driving connecting rod 24 to deflect towards cabin door body;

[0022] The slide rail 3 extends inwards and upwards in the cabin inner side, the cabin door body 1 can slide along the slide rail 3, and in the sliding process, the bottom of the fairing wallboard 2 slides along the track 23 to fit the cabin door body 1 under the driving of the torsional spring 25 and the connecting rod 24, and then moves upwards with the cabin door body 1 to completely open the cabin door.

[0023] The cabin door of the present application is configured to slide inwards and upwards along the fuselage side wall, referring to the slide rail form of Figure 3 The bottom of the slide rail 3 is first an inward structure, and then extends upwards. Secondly, the present application proposes to design the fairing wallboard 2 located outside the cabin door as a movable storage structure, referring to Figure 2 and Figure 4 In the closed position of the cabin door, the cabin door body 1 serves as the main structure for closing the cargo hold, and the fairing wallboard 2 is an additional structure located outside the cabin door body 1, with the upper end fitted to the middle of the outer wall of the cabin door and the lower end extending to the outside of the fuselage. As a part of the landing gear fairing 4, an opening is provided in the corresponding position of the original landing gear fairing 4, and the fairing wallboard 2 is located in the opening to form a required aerodynamic shape together with the original landing gear fairing 4. In the opening process of the cabin door body 1, as shown in Figure 5 The bottom end of the fairing wallboard 2 moves away from the original position and approaches the outer wall of the cabin door, which is due to the action of the torsional spring 25 and the connecting rod 24. The torsional spring 25 itself provides an initial torsional force to the connecting rod 24. In the closed position of the cabin door, the supporting force of the track 23 and the connecting rod 24 resists the torsional force of the torsional spring 25, so that the fairing wallboard 2 remains in the opening position of the original landing gear fairing 4. As the cabin door body 1 moves upwards, the distance between the hinge point of the connecting rod 24 and the cabin door body 1, i.e. the distance between the position of the torsional spring and the track 23 at the bottom, increases. Under the action of the torsional spring 25, the fairing wallboard 2 is stored inwards. As shown in Figure 5As shown, at this time, the hatch door is not fully opened, the bottom of the fairing wall plate 2 is close to the outer wall of the hatch door body 1, and the pulley 22 at the bottom of the fairing wall plate 2 has approached the end of the track 23. After the hatch door body 1 and the fairing wall plate 2 continue to move upward, the pulley 22 will be separated from the track 23.

[0024] The closing process of the hatch door is opposite to the opening process. After the hatch door body 1 and the fairing wall plate 2 fall, the bottom end pulley 22 of the fairing wall plate 2 first contacts the track 23. After the hatch door body 1 continues to fall, the pulley 22 moves along the track 23, and the tension torsion spring 25 is stretched until the fairing wall plate 2 is reset to the position of the opening of the original landing gear fairing cover 4.

[0025] In some alternative embodiments, the connecting rod 24 has two, which are arranged at positions close to the two sides between the hatch door body 1 and the fairing wall plate 2. This embodiment improves the structural stability by arranging two connecting rods in the gap. In alternative embodiments, multiple connecting rods can also be provided, and each connecting rod can be driven by a torsion spring alone or share a torsion spring.

[0026] In some alternative embodiments, the air drop parachute hatch door further comprises a hatch door lifting assist mechanism 5 connected to the hatch door body 1 through a steel cable, for providing upward pulling force to the hatch door body 1.

[0027] In this embodiment, the hatch door lifting assist mechanism 5 is connected to the door body structure through a steel cable, and the personnel can assist in opening and closing the hatch door during operation, thereby reducing the required operating force. The output lifting force of the lifting assist device is slightly smaller than the gravity of the door body structure.

[0028] In some alternative embodiments, the slide rail 3 comprises a first group of slide rails for guiding the movement of the upper end of the hatch door body 1, and a second group of slide rails for guiding the movement of the lower end of the hatch door body 1.

[0029] In some alternative embodiments, the upper end of the hatch door body 1 has a first locking mechanism, which is locked with the hatch door closing locking device 6 arranged on the first group of slide rails when the hatch door body 1 is closed.

[0030] In some alternative embodiments, the lower end of the hatch door body 1 has a second locking mechanism, which is locked with the hatch door opening locking device 7 arranged on the second group of slide rails when the hatch door body 1 is opened.

[0031] Reference Figure 3 The hatch door closing locking device 6 and the hatch door opening locking device 7 are arranged at the same height as the personnel, which is convenient for operation. In addition to being arranged on the slide rail, the hatch door closing locking device 6 and the hatch door opening locking device 7 can also be arranged on the cabin side wall near the hatch door.

[0032] The present application has the following advantages:

[0033] 1. The opening form of the hatch is sliding upward and inward along the side wall of the fuselage, which is different from the fixed-axis rotation or translation opening form. This opening form can adapt to the hatch with the opening located at the rear of the fuselage and with part of the landing gear fairing, avoiding the interference with the fuselage and fairing structure during the opening process of the hatch.

[0034] 2. The outer side of the hatch is provided with part of the main landing gear fairing structure, and the fairing structure is designed as a movable structure that can be retracted to the hatch. The fairing structure can be retracted to the side of the hatch during the opening of the hatch to reduce the sweeping space during the movement of the hatch, avoiding the occupation of too much space in the cabin during the opening process of the hatch, and improving the utilization rate and use effect of the aircraft cargo compartment.

[0035] 3. The opening and closing operation process of the hatch is simple and reliable. Compared with the hatch of the same size, the number of operating mechanism parts of the hatch is small, the movement chain path is short, and the operation is safe and reliable.

[0036] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical range disclosed in the present application can be easily thought by those skilled in the art, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A parachute hatch that slides upwards and opens into the cabin, characterized in that, Includes the cabin door body (1), the fairing wall panel (2), and the sliding rail (3) installed inside the cabin. The fairing panel (2) is part of the landing gear fairing (4) and has an aerodynamic shape adapted to the landing gear fairing (4). The width of the fairing panel (2) is the same as the width of the door body (1). The top is hinged to the outer wall of the door body (1) through a pivot (21). Pulleys (22) are provided on both sides of the bottom. The pulleys (22) can slide on the track (23). The track (23) extends from the inner wall of the landing gear fairing (3) to the outer wall of the door body (1). The outer wall of the door body (1) is also connected to the inner wall of the fairing panel (2) through a connecting rod (24). The door body (1) is hinged to the connecting rod (24) and is equipped with a torsion spring (25) that drives the connecting rod (24) to deflect toward the door body. The slide rail (3) extends inward and upward inside the cabin. The door body (1) can slide along the slide rail (3). During the sliding process, the bottom of the rectifier wall panel (2) slides along the track (23) to fit the door body (1) under the drive of the torsion spring (25) and the connecting rod (24). Then, it moves upward with the door body (1) until the door is fully opened.

2. The parachute hatch that slides upwards and opens into the cabin as described in claim 1, characterized in that, The connecting rod (24) has two parts, which are respectively arranged on both sides of the gap between the hatch body (1) and the flow wall (2).

3. The parachute hatch that slides upwards and opens into the cabin as described in claim 1, characterized in that, The parachute hatch also includes a hatch lifting assist mechanism (5), which is connected to the hatch body (1) by a steel cable and is used to provide upward pulling force to the hatch body (1).

4. The parachute hatch that slides upwards and opens into the cabin as described in claim 1, characterized in that, The slide rail (3) includes a first set of slide rails for guiding the upper end of the hatch body (1) to move, and a second set of slide rails for guiding the lower end of the hatch body (1) to move.

5. The parachute hatch that slides upwards and opens into the cabin as described in claim 4, characterized in that, The upper end of the hatch body (1) has a first locking mechanism, which locks with the hatch closing locking device (6) provided on the first set of slide rails when the hatch body (1) is closed.

6. The parachute hatch that slides upwards and opens into the cabin as described in claim 4, characterized in that, The lower end of the hatch body (1) has a second locking mechanism, which locks against the hatch opening locking device (7) provided on the second set of slide rails when the hatch body (1) is opened.

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