A method for installing a helicopter sliding cabin door with an automatic control function

Abstract

The present invention belongs to the technical field of helicopter structural design, and particularly relates to a method for installing a sliding cabin door on a helicopter with an automatic control function. By using the original helicopter body structure, a sliding cabin door opening 1 is constructed thereon, and a sliding cabin door main structure is formed by installing a front door frame assembly 2, a rear door frame assembly 3, a slide rail assembly 4 and a sliding cabin door assembly 5. The automatic control function of the sliding cabin door is realized by installing an extended platform assembly 6 and an automatic control device 7. This method has strong universality and low requirements for the body structure; after the cabin door is installed, the aerodynamic impact on the body is small; the sliding cabin door can be automatically controlled to open and close, reducing manual operation and improving the use experience of the helicopter.

Description

Technical Field

[0001] The present invention belongs to the technical field of helicopter structural design, and particularly relates to a method for installing a helicopter sliding hatch with an automatic control function. Background Art

[0002] The helicopter sliding hatch can achieve a large fuselage opening, meet the needs of large items to enter and exit, and improve the comfort of passengers entering and exiting; after it is opened, it protrudes less from the fuselage outer dimension, and has little impact on the helicopter's aerodynamic load; it can be opened in the air and cooperate with a winch or sling to complete air search and rescue missions, etc. Given the above unique advantages, the sliding hatch is widely used on helicopters.

[0003] Currently, a large number of helicopters in use in China are not equipped with sliding hatches, and at the same time, there is also a large demand and intention to modify the sliding hatches of a large number of helicopters equipped with sliding hatches. Installing a sliding hatch with an automatic control function on the original aircraft basic structure can improve the convenience of using the space inside the fuselage, enhance the comprehensive evaluation of the helicopter, and optimize the helicopter usage experience. Summary of the Invention

[0004] The present invention provides a method for installing a helicopter sliding hatch with an automatic control function for helicopters without a sliding hatch and helicopters that expect to upgrade the sliding hatch to an automatic hatch. This method has strong universality and low requirements for the airframe structure; after installing the hatch, it has little impact on the aerodynamics of the airframe; the sliding hatch can be automatically controlled to open and close, reducing manual operation and enhancing the helicopter usage experience.

[0005] The technical solution of the present invention:

[0006] A method for installing a helicopter sliding hatch with an automatic control function, the method comprising:

[0007] S1, first determine the position of the fuselage opening for installing the sliding hatch on the helicopter airframe;

[0008] S2, install a front door frame assembly 2 at the front of the fuselage opening along the flight direction;

[0009] S3, install a rear door frame assembly 3 at the rear of the fuselage opening along the flight direction;

[0010] S4, install a slide rail assembly 4 outside the helicopter fuselage;

[0011] S5, install a sliding hatch assembly 5 on the slide rail assembly 4;

[0012] S6, rivet an extended platform 6 on the upper platform of the helicopter airframe;

[0013] S7. Install an automatic control device 7 inside the helicopter fuselage to complete the process of installing a helicopter sliding hatch with automatic control function on the helicopter.

[0014] Further, S1 is specifically as follows:

[0015] Determine the fuselage opening position for installing the sliding hatch on a helicopter without a sliding hatch: Select the upper platform, the lower fuselage components, and the enclosed area of the two main load-bearing frames, and cancel the fuselage skin in this area as the fuselage opening position for the sliding hatch.

[0016] Further, S1 is specifically as follows:

[0017] Determine the fuselage opening position for installing the sliding hatch on a helicopter with a sliding hatch: Cancel the sliding hatch door frame on the original fuselage as the fuselage opening position for the sliding hatch.

[0018] Further, install a front door frame assembly 2 at the front of the fuselage opening along the flight direction. The front door frame assembly 2 is composed of a front door frame 21 and a support frame 22;

[0019] The lower part of the support frame 22 is screwed to the fuselage floor, and the upper part can be riveted to the upper platform. A guide groove 221, a front door lock mounting bracket 222, and other equipment mounting brackets 223 are riveted on the support frame 22;

[0020] The front door frame 21 can be riveted to the fuselage skin and the support frame 22 at the front of the fuselage opening along the flight direction. A front sealing strip 211 is glued to the front door frame 21. The front door frame 21 realizes the fairing function and the sealing function for the installed sliding hatch.

[0021] Further, install a rear door frame assembly 3 at the rear of the fuselage opening along the flight direction. The rear door frame assembly 3 is composed of a rear door frame 31, a reinforcing member 32, and an adjusting member 33;

[0022] The rear door frame 31 can be riveted and screwed to the main rear load-bearing frame, the upper platform, the side beam of the lower component, and the fuselage floor. A rear sealing strip 311 is glued to the rear door frame 31;

[0023] The rear door frame 31 can adjust the opening size of the sliding hatch and realize the sealing function at the rear of the hatch. The reinforcing member 32 and the adjusting member 33 are riveted between the rear door frame 31 and the main rear load-bearing frame of the fuselage. There is a certain overlapping dimension between the reinforcing member 32 and the adjusting member 33 to facilitate adjusting the assembly gap between the rear door frame 31 and the rear main load-bearing frame;

[0024] Pallet nuts can also be arranged on the reinforcing member 32 for the installation of the rear hatch lock.

[0025] Further, install a slide rail assembly 4 outside the fuselage. The slide rail assembly 4 is composed of an upper slide rail 41, a rear slide rail 42, a lower slide rail 43, and a slide rail bracket 44;

[0026] The sliding rail assembly 4 provides an installation interface for the sliding hatch assembly 5. The upper sliding rail 41, the rear sliding rail 42, and the lower sliding rail 43 are all linear sliding rails, which facilitate the realization of the driving hatch function by using an automatic control device.

[0027] Furthermore, a sliding hatch assembly 5 is installed on the sliding rail assembly 4. The sliding hatch assembly 5 is composed of a sliding hatch door body 51, a roller assembly 52, and a limiting member 53.

[0028] The roller assembly 52 is embedded and installed inside the sliding rail assembly 4 to enable the sliding function of the sliding hatch assembly. The limiting member 53 cooperates with the guiding groove 221 to realize the guiding and limiting functions of the sliding hatch. The configuration of the beveled front and rear parts of the hatch door body 51 cooperates with the front sealing strip 211 and the rear sealing strip 311 to realize the sealing function of the hatch.

[0029] Furthermore, an extended platform 6 is riveted on the upper platform of the helicopter. The extended platform 6 is formed by riveting multiple joints and skins, and provides an installation interface for the upper sliding rail 41.

[0030] Furthermore, an automatic control device 7 is installed inside the helicopter body. It drives the roller assembly 52 embedded in the upper sliding rail 41 to drive the sliding hatch to move.

[0031] A method for installing a sliding hatch with automatic control function on a helicopter provided by the present invention can be used for modifying a helicopter without a sliding hatch, and can also be used for modifying a helicopter with a sliding hatch to improve the use experience of the helicopter. This method has universality: the helicopter body structure is mostly provided with an upper platform, a reinforced bulkhead, and a lower member with main load-bearing characteristics, and an area suitable for modifying into a sliding hatch can be planned within its enclosed area; by adjusting the heading dimension of the rear door frame, the purpose of adjusting the opening dimension of the sliding hatch can be achieved; the front door frame assembly, the rear door frame assembly, and the sliding hatch assembly provided by this method include the necessary components to realize the function of the sliding hatch. This method has a low technical difficulty in installing the sliding hatch and is easy to realize the function: the installation of the front door frame assembly, the rear door frame assembly, and the sliding rail assembly can be realized by using the structures such as the outer skin and the floor of the helicopter body; a linear sliding rail is set outside the body, and the movement form of the sliding hatch is simple; a front door frame with a fairing function not only reduces the aerodynamic influence caused by the external placement of the sliding hatch, but also realizes functions such as hatch limiting and sealing. This method is convenient to realize the automatic control of the hatch: by installing an extended platform, the installation space for the upper sliding rail is provided, and then the goal of driving the hatch to move through the moving components in the upper sliding rail is achieved. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of a sliding hatch installed by using a method for installing a sliding hatch with automatic control function on a helicopter according to the present invention;

[0033] Figure 2 It is the fuselage opening indication;

[0034] Figure 3 This is a schematic diagram of the front door frame assembly;

[0035] Figure 4 This is a schematic diagram of the rear door frame assembly;

[0036] Figure 5 It is a schematic diagram of the slide rail assembly;

[0037] Figure 6 It is a schematic diagram of the sliding door assembly;

[0038] Figure 7 It is a schematic diagram of the extended platform components;

[0039] 1. Body opening 2. Front door frame assembly 3. Rear door frame assembly 4. Slide rail assembly 5. Sliding door assembly 6. Extension platform assembly 7. Automatic control device. DETAILED DESCRIPTION

[0040] A method for installing a helicopter sliding door with an automatic control function according to the present invention is described in conjunction with the accompanying drawings.

[0041] like Figure 1 The figure shows a schematic diagram of a sliding door installed in a method for adding a helicopter sliding door with an automatic control function according to the present invention, the method comprising the following steps: a fuselage opening 1, installing a front door frame assembly 2, installing a rear door frame assembly 3, installing a slide rail assembly 4, installing a sliding door assembly 5, installing an extension platform assembly 6 and installing an automatic control device 7.

[0042] like Figure 2 The fuselage opening 1 shown refers to a helicopter fuselage without a sliding door, in which the upper platform, floor, and skin of the area enclosed by two main load-bearing frames are eliminated as the opening for the sliding door; a helicopter fuselage with a sliding door can eliminate the original door frame to increase the size of the sliding door opening.

[0043] like Figure 3 The figure shows the installation of a front door frame assembly 2, including a front door frame 21 with a rectifying function and a reinforcing frame 22 with a supporting function installed outside the original body, wherein a front sealing strip 211 is provided on the front door frame 21, and a guide groove 221 for limiting the sliding door, a front door lock mounting bracket 222, and other equipment mounting brackets 223 are provided on the reinforcing frame 22.

[0044] like Figure 4Shown is the added rear door frame assembly 3, which includes a rear door frame 31 with adjustable opening size installed outside the original airframe, and a reinforcing member 32 and an adjusting member 33 for enhancing stiffness and facilitating adjustment of assembly allowance. A rear sealing strip 311 is provided on the rear door frame 31, and the reinforcing member 32 also functions as a rear door lock mounting bracket.

[0045] As Figure 5 Shown is the added sliding rail assembly 4, which includes an upper sliding rail 41, a rear sliding rail 42, and a lower sliding rail 43 installed outside the airframe to guide the sliding of the sliding hatch door assembly 5, as well as a sliding rail bracket 44 for connecting each sliding rail to the airframe.

[0046] As Figure 6 Shown is the added sliding hatch door assembly 5, which includes a sliding hatch door body 51, a roller assembly 52, and a limiting member 53.

[0047] As Figure 7 Shown is the added extended platform assembly 6, which includes a plurality of connectors 61 and a skin 62.

[0048] Example 1:

[0049] 1. Install a helicopter sliding hatch door with automatic control function on a helicopter without a sliding hatch door according to the method described in the present invention.

[0050] First, determine the position for installing the sliding hatch door on the helicopter airframe. Usually, select the upper platform, the lower components of the airframe, and the area surrounded by two main load-bearing frames. Canceling the fuselage skin in this area causes the least impact on the overall force of the airframe and can form a relatively large sliding hatch door opening.

[0051] Furthermore, install a front door frame assembly 2 at the front of the fuselage opening along the flight direction. It mainly consists of a front door frame 21 and a support frame 22. Further, the lower part of the support frame 22 can be screwed to the fuselage floor, and the upper part can be riveted to the upper platform. Further, a guide groove 221 is riveted on the support frame 22, a front door lock mounting bracket 222 and other equipment mounting brackets 223 are screwed. The support frame 22 provides stiffness guarantee for the front door frame assembly 2 and installation interfaces for each connector. Further, the front door frame 21 can be riveted to the fuselage skin at the front of the fuselage opening along the flight direction and the support frame 22. Further, a front sealing strip 211 is adhesively bonded to the front door frame 21. The front door frame 21 realizes the fairing function and the sealing function for the added sliding hatch door.

[0052] Further, a rear door frame assembly 3 is added to the rear part of the fuselage opening along the flight direction. It is mainly composed of a rear door frame 31, a reinforcing member 32, and an adjusting member 33. Further, the rear door frame 31 can be riveted and bolted to the main rear load-bearing frame, the upper platform, the side beam of the lower member, and the fuselage floor. Further, a rear sealing strip 311 is adhesively bonded to the rear door frame 31. The rear door frame 31 can adjust the sliding hatch opening size and achieve the sealing function at the rear of the hatch. Further, the reinforcing member 32 and the adjusting member 33 are riveted between the rear door frame 31 and the main rear load-bearing frame of the fuselage. There is a certain overlapping dimension between the reinforcing member 32 and the adjusting member 33, which is convenient for adjusting the assembly clearance between the rear door frame 31 and the rear main load-bearing frame. Further, pallet nuts can also be arranged on the reinforcing member 32 for the installation of the rear hatch lock.

[0053] Further, a slide rail assembly 4 is added to the outside of the fuselage. It is mainly composed of an upper slide rail 41, a rear slide rail 42, a lower slide rail 43, and a slide rail bracket 44, providing an installation interface for the sliding hatch assembly 5. The upper slide rail 41, the rear slide rail 42, and the lower slide rail 43 are all linear slide rails, which are convenient for using an automatic control device to realize the function of driving the hatch.

[0054] Further, a sliding hatch assembly 5 is added to the slide rail assembly 4. It is mainly composed of a sliding hatch door body 51, a roller assembly 52, and a limiting member 53. Further, the roller assembly 52 is embedded and installed in the slide rail assembly 4 to realize the sliding function of the sliding hatch assembly. Further, the limiting member 53 cooperates with the guide groove 221 to realize the guiding and limiting functions for the sliding hatch. The front and rear beveled configurations of the hatch door body 51 cooperate with the front sealing strip 211 and the rear sealing strip 311 to realize the sealing function of the hatch.

[0055] Further, an extended platform 6 is riveted to the upper platform. It is formed by riveting multiple joints and skins, providing an installation interface for the upper slide rail 41.

[0056] Further, an automatic control device 7 is added inside the airframe. It drives the roller assembly 52 embedded in the upper slide rail 41 to drive the sliding hatch to move.

[0057] Through the above steps, the work of installing a helicopter sliding hatch with automatic control function on a helicopter without a sliding hatch can be completed.

[0058] Embodiment 2:

[0059] 1. Install a helicopter sliding hatch with automatic control function on a helicopter with a sliding hatch according to the method described in the present invention.

[0060] First, the sliding hatch door frame on the original airframe can be removed to facilitate further modification, and at the same time, the sliding hatch opening can be increased.

[0061] Further, a front door frame assembly 2 is installed at the front of the fuselage opening along the flight direction. It is mainly composed of a front door frame 21 and a support frame 22. Further, the lower part of the support frame 22 can be screwed to the fuselage floor, and the upper part can be riveted to the upper platform. Further, a guide groove 221 is riveted on the support frame 22, and a front door lock mounting bracket 222 and other equipment mounting brackets 223 are screwed. The support frame 22 provides stiffness guarantee for the front door frame assembly 2 and installation interfaces for various joints. Further, the front door frame 21 can be riveted to the fuselage skin at the front of the fuselage opening along the flight direction and the support frame 22. Further, a front sealing strip 211 is adhesively bonded to the front door frame 21. The front door frame 21 realizes the fairing function and the sealing function for the installed sliding hatch door.

[0062] Further, a rear door frame assembly 3 is installed at the rear of the fuselage opening along the flight direction. It is mainly composed of a rear door frame 31, a reinforcing member 32 and an adjusting member 33. Further, the rear door frame 31 can be riveted and screwed to the main rear load-bearing frame, the upper platform, the lower member side beam and the fuselage floor. Further, a rear sealing strip 311 is adhesively bonded to the rear door frame 31. The rear door frame 31 can adjust the opening size of the sliding hatch door and realize the sealing function at the rear of the hatch door. Further, the reinforcing member 32 and the adjusting member 33 are riveted between the rear door frame 31 and the main rear load-bearing frame of the fuselage. There is a certain overlapping dimension between the reinforcing member 32 and the adjusting member 33, which is convenient for adjusting the assembly gap between the rear door frame 31 and the rear main load-bearing frame. Further, a clevis nut can also be arranged on the reinforcing member 32 for the installation of the rear cabin door lock.

[0063] Further, the original on-board slide rail assembly is cancelled and a slide rail assembly 4 is installed outside the fuselage. It is mainly composed of an upper slide rail 41, a rear slide rail 42, a lower slide rail 43 and a slide rail bracket 44, providing an installation interface for the sliding hatch door assembly 5. The upper slide rail 41, the rear slide rail 42 and the lower slide rail 43 are all linear slide rails, which are convenient for using an automatic control device to realize the function of driving the hatch door.

[0064] Further, a sliding hatch door assembly 5 is installed on the slide rail assembly 4. It is mainly composed of a sliding hatch door body 51, a roller assembly 52 and a limiting member 53. Further, the roller assembly 52 is embedded and installed in the slide rail assembly 4 to realize the sliding function of the sliding hatch door assembly. Further, the limiting member 53 cooperates with the guide groove 221 to realize the guiding and limiting functions for the sliding hatch door. The front and rear beveled configurations of the hatch door body 51 cooperate with the front sealing strip 211 and the rear sealing strip 311 to realize the sealing function of the hatch door.

[0065] Further, an extended platform 6 is riveted on the upper platform. It is riveted by a plurality of joints and skins, providing an installation interface for the upper slide rail 41.

[0066] Further, an automatic control device 7 is installed inside the fuselage. It drives the roller assembly 52 embedded in the upper slide rail 41 to drive the sliding hatch door to move.

[0067] Through the above steps, the work of installing a helicopter sliding door with automatic control function on a helicopter with a sliding door can be completed.

[0068] A method for installing a helicopter sliding door with automatic control function provided by the present invention can be used for modifying a helicopter without a sliding door, and can also be used for modifying a helicopter with a sliding door to improve the helicopter use experience. This method has universality: the helicopter body structure is mostly provided with an upper platform, a reinforcing bulkhead and a lower member with main load-bearing characteristics, and an area suitable for modifying into a sliding door can be planned within the enclosed area; by adjusting the heading dimension of the rear door frame, the purpose of adjusting the opening dimension of the sliding door can be achieved; the front door frame assembly, the rear door frame assembly and the sliding door assembly provided by this method include the necessary components for realizing the sliding door function. The technical difficulty of installing the sliding door by this method is low and the function is easy to realize: the installation of the front door frame assembly, the rear door frame assembly and the slide rail assembly can be realized by using the structures such as the outer skin and the floor of the helicopter body; a linear slide rail outside the body is provided, and the movement form of the sliding door is simple; a front door frame with a fairing function is provided, which not only reduces the aerodynamic influence caused by the external placement of the sliding door, but also realizes functions such as door limit and sealing. This method is convenient for realizing the automatic control of the door: by installing an extended platform, the installation space of the upper slide rail is provided, and then the goal of driving the door to move through the moving parts in the upper slide rail is achieved.

Claims

1. A method for installing a sliding helicopter door with an automatic control function, characterized in that, The method includes: S1. First, determine the fuselage opening position for installing a sliding hatch on the helicopter fuselage. S2. Install a front door frame assembly (2) at the front of the fuselage opening along the flight direction; the front door frame assembly (2) consists of a front door frame (21) and a support frame (22); the lower part of the support frame (22) is screwed to the fuselage floor, and the upper part can be riveted to the upper platform. A guide groove (221) is riveted on the support frame (22), and a front door lock mounting bracket (222) and other equipment mounting brackets (223) are screwed. The front door frame (21) can be riveted to the fuselage skin at the front of the fuselage opening along the flight direction and on the support frame (22). A front sealing strip (211) is glued to the front door frame (21). The front door frame (21) realizes the fairing function and sealing function for the installed sliding hatch. S3. Install a rear door frame assembly (3) at the rear of the fuselage opening along the flight direction; the rear door frame assembly (3) consists of a rear door frame (31), a reinforcing member (32), and an adjusting member (33); the rear door frame (31) can be riveted and screwed to the main rear load-bearing frame, the upper platform, the lower member side beam, and the fuselage floor. A rear sealing strip (311) is glued to the rear door frame (31); the rear door frame (31) can adjust the opening size of the sliding hatch and realize the rear sealing function of the hatch. The reinforcing member (32) and the adjusting member (33) are riveted between the rear door frame (31) and the main rear load-bearing frame of the fuselage. There is a certain overlapping dimension between the reinforcing member (32) and the adjusting member (33) to facilitate adjusting the assembly gap between the rear door frame (31) and the rear main load-bearing frame; a clevis nut can also be arranged on the reinforcing member (32) for installing the rear cabin door lock. S4. Install a slide rail assembly (4) outside the helicopter fuselage. S5. Install a sliding hatch assembly (5) on the slide rail assembly (4). S6. Rivet an extended platform (6) on the upper platform of the helicopter fuselage. S7. Install an automatic control device (7) inside the helicopter fuselage to complete the process of installing an automatically controlled helicopter sliding hatch on the helicopter.

2. A method for installing a helicopter sliding hatch with an automatic control function according to claim 1, characterized in that, S1 specifically is: Determine the fuselage opening position for installing a sliding hatch on a helicopter without a sliding hatch: Select the area surrounded by the upper platform, the lower fuselage components, and the two main load-bearing frames, and cancel the fuselage skin in this area as the fuselage opening position for the sliding hatch.

3. A method for installing a helicopter sliding hatch with an automatic control function according to claim 1, characterized in that S1 specifically is: Determine the fuselage opening position for installing a sliding hatch on a helicopter with a sliding hatch: Cancel the sliding hatch door frame on the original fuselage as the fuselage opening position for the sliding hatch.

4. A method for installing a helicopter sliding hatch with an automatic control function according to claim 1, characterized in that, Install a slide rail assembly (4) outside the fuselage. The slide rail assembly (4) consists of an upper slide rail (41), a rear slide rail (42), a lower slide rail (43), and a slide rail bracket (44). The slide rail assembly (4) provides an installation interface for the sliding hatch assembly (5). The upper slide rail (41), the rear slide rail (42), and the lower slide rail (43) are all linear slide rails, which facilitate realizing the function of driving the hatch by using the automatic control device.

5. A method for installing a sliding hatch on a helicopter with an automatic control function according to claim 4, characterized in that, Install a sliding hatch assembly (5) on the slide rail assembly (4). The sliding hatch assembly (5) consists of a sliding hatch door body (51), a roller assembly (52), and a limiting member (53). The roller assembly (52) is embedded and installed in the slide rail assembly (4) to enable the sliding function of the sliding hatch assembly. The limiting member (53) cooperates with the guiding groove (221) to realize the guiding and limiting functions of the sliding hatch. The front and rear beveled configurations of the hatch door body (51) cooperate with the front sealing strip (211) and the rear sealing strip (311) to achieve the sealing function of the hatch.

6. A method for installing a sliding hatch on a helicopter with an automatic control function according to claim 5, characterized in that, The extended platform (6) is riveted on the upper platform of the helicopter. The extended platform (6) is formed by riveting multiple joints and skins, providing an installation interface for the upper slide rail (41).

7. A method for installing a helicopter sliding hatch with an automatic control function according to claim 5, characterized in that, An automatic control device (7) is installed inside the helicopter body. It drives the roller assembly (52) embedded in the upper slide rail (41) to drive the sliding hatch to move.

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