A sliding rail mechanism for a helicopter sliding fairing and a helicopter sliding fairing

Abstract

The application discloses a sliding rail mechanism and a sliding fairing for a helicopter, which comprises three sliding rails, i.e., two side sliding rails symmetrically arranged and fixedly installed on a power platform and a middle sliding rail fixedly installed on a sidewall of a firewall; wherein each sliding rail is installed in parallel along a heading direction, and a dismounting opening is formed in the middle position of each sliding rail, used for the sliding pulley at the corresponding position of the sliding fairing to be taken out of or put into the dismounting opening when sliding on the corresponding sliding rail, and a middle plug cover assembly is arranged at the position of each dismounting opening to prevent the sliding pulley of the sliding fairing from being taken out of the corresponding sliding rail during the sliding process; a first limiting mechanism is arranged on each sliding rail to prevent the sliding pulley at the corresponding position of the sliding fairing from being taken out of the dismounting opening of the sliding rail; a second limiting mechanism is further arranged on each sliding rail to limit the sliding pulley at the corresponding position of the sliding fairing in the dismounting opening of the sliding rail; and a buffer and limiting mechanism is arranged on each side sliding rail to limit the sliding pulley at the corresponding position of the sliding fairing in the completely opened position of the sliding fairing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of helicopter structure design, and particularly relates to a sliding rail mechanism for a helicopter sliding fairing and the helicopter sliding fairing. BACKGROUND

[0002] The power platform of a helicopter is usually provided with a sliding fairing, and the sliding fairing in the existing helicopter is usually disassembled from the front end or the rear end of the sliding rail.

[0003] However, the structure on the helicopter often interferes with the disassembly of the sliding fairing from the front end or the rear end, causing difficulty in disassembly or even inability to disassemble. SUMMARY

[0004] The present application relates to the technical field of helicopter structure design, and particularly relates to a sliding rail mechanism for a helicopter sliding fairing and the helicopter sliding fairing.

[0005] The technical scheme of the present application is as follows: In a first aspect, the present application provides a sliding rail mechanism for a helicopter sliding fairing, comprising: three sliding rails, namely two side sliding rails 1 symmetrically arranged and fixedly installed on a power platform 4, and a middle sliding rail 3 fixedly installed on one side wall of a firewall 5.

[0006] Each sliding rail is installed in parallel along the heading direction, and a disassembly opening is arranged at the middle position of each sliding rail, used for the pulley 6 at the corresponding position of the sliding fairing to be taken out of or put into the disassembly opening when sliding on the corresponding sliding rail, and a middle plug cover assembly is arranged at each disassembly opening position to prevent the pulley 6 of the sliding fairing from being taken out of the corresponding sliding rail during sliding.

[0007] A first limiting mechanism 7 is arranged on each sliding rail to prevent the pulley 6 at the corresponding position of the sliding fairing from being taken out of the disassembly opening of the sliding rail, and a second limiting mechanism is further arranged on each sliding rail to limit and fix the pulley 6 at the corresponding position of the sliding fairing at the disassembly opening of the sliding rail, and a buffer and limiting mechanism 8 is arranged on each side sliding rail 1 to limit the pulley 6 at the corresponding position of the sliding fairing at the fully open position of the sliding fairing.

[0008] Optionally, in the sliding rail mechanism for the helicopter sliding fairing, the first limiting mechanism 7 arranged at the disassembly opening position of each side sliding rail 1 comprises a first middle plug cover assembly 10 and a countersunk screw 9.

[0009] The first intermediate blocking cover assembly 10 comprises a slide rail opening cover 11 with an inner profile consistent with the inner profile of the side slide rail 1. The connecting part of the slide rail opening cover 11 is fixedly installed on the dismounting opening position of the side slide rail 1 by means of the countersunk screw 9, so that the slide rail part of the slide rail opening cover 11 forms an integral slide with the side slide rail 1, thereby enabling the pulley 6 to slide between the side slide rail 1 and the slide rail opening cover 11.

[0010] Optionally, in the slide rail mechanism for the sliding fairing of a helicopter as described above, the first intermediate blocking cover assembly 10 of each side slide rail 1 further comprises two limiting pins 12.

[0011] The slide rail opening cover 11 is provided in an L shape, and the two limiting pins 12 are in interference fit with the holes on the connecting part of the slide rail opening cover 11.

[0012] The limiting mode of the side slide rail 1 is that, when the sliding fairing is not dismounted, the slide rail opening cover 11 is fixedly connected to the side wall of the side slide rail 1 by means of its connecting part, and forms an integral slide with the side slide rail 1 by means of its slide rail part, and the two limiting pins 12 are located on the back side of the side wall of the side slide rail 1.

[0013] When the sliding fairing is dismounted, the countersunk screw 9 is removed to remove the first intermediate blocking cover assembly 10, the sliding fairing is slid to place the pulley 6 at the corresponding position of the side slide rail 1 at the dismounting opening position, and then the two limiting pins 12 on the first intermediate blocking cover assembly 10 are inserted into the holes on the side wall of the side slide rail 1 in reverse, so that the pulley 6 is located between the two limiting pins 12, thereby limiting the movement of the sliding fairing; wherein the second limiting mechanism of the side slide rail 1 is formed by the replacement of the slide rail opening cover 11 and the two limiting pins 12.

[0014] Optionally, in the slide rail mechanism for the sliding fairing of a helicopter as described above, the buffer and limiting mechanism 8 on each side slide rail 1 is provided at the end of the slide rail; the buffer and limiting mechanism 8 comprises a rubber buffer block 14 and a spring sheet 15.

[0015] The spring sheet 15 is provided with a middle concave structure, is connected to the side wall of the side slide rail 1 by means of the countersunk screw 9, and the middle concave structure is embedded in the slide rail through the waist-shaped hole on the slide rail face of the side slide rail 1. The rubber buffer block 14 is fixedly connected to the inner side of the side wall of the side slide rail 1 by means of the large flat head screw 23, so that a limiting space is formed between the middle concave structure of the spring sheet 15 and the rubber buffer block 14.

[0016] Optionally, in the slide rail mechanism for the sliding fairing of a helicopter as described above,

[0017] The buffer and limiting mechanism 8 is adopted, in the process of opening the sliding fairing, the pulley 6 first collides with the spring sheet 15, the movement of the sliding fairing is buffered through the extrusion deformation of the spring sheet 15, when the spring sheet 15 is deformed to a certain extent, the pulley 6 continues to move through the gap between the spring sheet 15 and the slide rail, finally, the pulley 6 collides with the rubber buffer block 14 after passing the spring sheet 15, stops moving, and finally remains in the limiting space formed by the middle concave structure of the spring sheet 15 and the rubber buffer block 14.

[0018] Optionally, in the slide rail mechanism for the sliding fairing of the helicopter as described above, the first limiting mechanism 7 arranged at the disassembly opening position of the middle slide rail 3 comprises a second middle plug cover 17 and a countersunk screw 9;

[0019] The second middle plug cover 17 is arranged in an L shape, and the connecting part thereof is fixedly installed on the side wall of the firewall 5 by the countersunk screw 9, so that the slide rail part thereof forms an integral slide with the middle slide rail 3, thereby enabling the pulley 6 to slide between the middle slide rail 3 and the second middle plug cover 17.

[0020] Optionally, in the slide rail mechanism for the sliding fairing of the helicopter as described above, the second limiting mechanism 16 of the middle slide rail 3 comprises a Y-shaped piece 19, a bracket 18, a hexagonal head screw 20 and a supporting plate nut;

[0021] The bracket 18 is riveted to the side wall of the firewall 5 and located below the disassembly opening 21 position of the middle slide rail 3; the lateral thickness of the bracket 18 is greater than the lateral thickness of the middle slide rail 3.

[0022] Four screw holes are arranged below the disassembly opening 21 of the bracket 18, which are symmetrically arranged upward and downward and left and right, and the supporting plate nut is installed on the screw holes; the Y-shaped piece 19 is fixed on the bracket 18 by the two hexagonal head screws 20 arranged left and right.

[0023] Optionally, in the slide rail mechanism for the sliding fairing of the helicopter as described above, the limiting mode of the second limiting mechanism 16 of the middle slide rail 3 is:

[0024] When disassembling the sliding fairing, the second middle plug cover 1 is first disassembled, the pulley 6 is placed at the middle disassembly opening 21 position by sliding the sliding fairing, the Y-shaped piece 19 is disassembled, and after being rotated counterclockwise by 90 degrees, the Y-shaped piece 19 is fixed on the bracket 18 by the two hexagonal head screws 20 arranged upward and downward; thereby the Y-shaped piece 19 is used to constrain the pulley joint 22 at the middle opening 21 position of the slide rail.

[0025] In a second aspect, the embodiment of the present application further provides a helicopter sliding fairing, comprising three groups of pulleys 6 arranged on the sliding fairing, and three slide rails arranged on the body platform, namely two side slide rails 1 fixedly arranged on the power platform 4 and symmetrically arranged, and a middle slide rail 3 fixedly arranged on the sidewall of the firewall 5.

[0026] The embodiment of the present application provides a sliding rail mechanism for a helicopter sliding fairing and the helicopter sliding fairing. On the one hand, the sliding rail mechanism is composed of three slide rails arranged in a triangular shape, and a structure form of three slide rails is provided. The sliding rail mechanism is installed on a fixed platform, and a group of pulley mechanisms arranged on the sliding fairing slide on the sliding rail mechanism. The opening and closing of the fairing are completed through the rolling of the pulleys in the slide rails. The middle disassembly opening of each slide rail in the sliding rail mechanism is used for the upward disengagement of the pulleys of the sliding fairing. On the other hand, a disassembly mode of the sliding fairing is provided. When the helicopter sliding fairing is hoisted and disassembled in the field, the fairing cannot be fixed due to the influence of strong wind environment, which causes the pulleys to be often misaligned with the slide rail openings, and the sliding fairing, the pulleys and the slide rails are damaged. The second limiting mechanism arranged on each slide rail solves this problem. On the other hand, the strong wind and improper operation of the operator can cause the sliding cover to open at too high a speed and impact the slide rail too much, causing damage to the pulleys and slide rail parts. The buffer effect of the buffer and limiting mechanism symmetrically arranged on the side slide rails eliminates the occurrence of this problem. In addition, the arrangement of the second limiting mechanism can ensure that the sliding fairing is always in the open position in the field with wind, ensuring the safety of the maintenance personnel and the working space.

[0027] The sliding rail mechanism provided by the embodiment of the present application ensures that the sliding fairing can be directly disassembled from the middle, avoids interference with the front end and / or rear end structure of the sliding fairing, effectively solves the problem of difficult disassembly or disassembly, and solves the risk of disengagement from the opening during the sliding process of the slide rail by reasonably designing the disassembly opening cover of the slide rail. The problem that the pulley and the disassembly opening of the slide rail cannot be aligned during the disassembly of the sliding cover is solved by reasonably designing the pulley limiting mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification, and are used to explain the technical solutions of the present application together with the embodiments of the present application, and do not constitute a limitation on the technical solutions of the present application.

[0029] Figure 1 The accompanying drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification, and are used to explain the technical solutions of the present application together with the embodiments of the present application, and do not constitute a limitation on the technical solutions of the present application.

[0030] Figure 2 The accompanying drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification, and are used to explain the technical solutions of the present application together with the embodiments of the present application, and do not constitute a limitation on the technical solutions of the present application.Figure 1 A schematic diagram of the overall structural arrangement of the side rails in the rail mechanism provided by the illustrated embodiment;

[0031] Figure 3 for Figure 2 A schematic structural diagram of a first limiting mechanism in a side rail provided in the illustrated embodiment;

[0032] Figure 4 for Figure 2 A schematic structural diagram of the second limiting mechanism in the side slide rail provided in the illustrated embodiment;

[0033] Figure 5 for Figure 4 A schematic diagram of the second limiting mechanism in the side rail provided in the illustrated embodiment limiting the position of the pulley;

[0034] Figure 6 for Figure 2 A schematic structural diagram of the buffer and limit mechanism in the side slide rail provided in the illustrated embodiment;

[0035] Figure 7 for Figure 6 A schematic diagram of the limiting relationship between the buffer and limiting mechanism in the side rail and the pulley mechanism provided by the illustrated embodiment;

[0036] Figure 8 for Figure 1 A schematic diagram of the overall structural arrangement of the middle slide rail in the slide rail mechanism provided in the illustrated embodiment;

[0037] Figure 9 for Figure 8 A schematic structural diagram of the second limiting mechanism in the middle slide rail provided in the illustrated embodiment;

[0038] Figure 10 for Figure 9 The illustrated embodiment provides a structural diagram of a second limiting mechanism in the middle slide rail for limiting the pulley. DETAILED DESCRIPTION

[0039] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0040] The above background technology has already explained the disassembly and assembly of the sliding fairing installed in existing helicopters; however, disassembly and assembly of the sliding fairing from the front or rear end often causes interference with the structural parts on the helicopter, making disassembly and assembly difficult or impossible.

[0041] In view of the above problems, the embodiment of the present application provides a slide rail mechanism for a sliding fairing of a helicopter, two groups of slide rails in the slide rail mechanism are installed on a power platform in the helicopter, and the other group of slide rails is installed on a firewall, correspondingly, corresponding positions of the sliding fairing are provided with slide rails capable of sliding on the slide rails, and the opening and closing of the fairing are completed through the rolling of the slide rails in the corresponding positions.

[0042] The following specific embodiments of the present application can be combined with each other, and the same or similar concepts or processes can not be described in some embodiments.

[0043] Figure 1 The overall structure schematic diagram of the slide rail mechanism for the sliding fairing of the helicopter provided by the embodiment of the present application is shown in the figure. Figure 1 The slide rail mechanism for the sliding fairing of the helicopter provided by the embodiment of the present application can include two side slide rails 1 fixedly installed on the power platform 4 and symmetrically arranged, and a middle slide rail 3 fixedly installed on one side wall of the firewall 5.

[0044] It should be noted that the power platform of the helicopter is horizontally arranged, the firewall is vertically arranged on the extension line of the central axis of the power platform, and the installation position of the firewall is close to the engine.

[0045] As shown in the slide rail mechanism, Figure 1 Each slide rail is installed in parallel along the heading direction, and a dismounting opening is formed in the middle position of each slide rail, which is used for the slide rail 6 at the corresponding position of the sliding fairing to slide out of and into the dismounting opening when sliding on the slide rail at the corresponding position, and a middle plug cover assembly is arranged at each dismounting opening position to prevent the slide rail 6 at the corresponding position of the sliding fairing from sliding out of the slide rail at the corresponding position during the sliding process.

[0046] Each slide rail of the embodiment of the present application is provided with a first limiting mechanism 7 for preventing the slide rail 6 at the corresponding position of the sliding fairing from sliding out of the dismounting opening position of the slide rail, each slide rail is further provided with a second limiting mechanism for limiting and fixing the slide rail 6 at the corresponding position of the sliding fairing at the dismounting opening position of the slide rail, and each side slide rail 1 is provided with a buffer and limiting mechanism 8 for limiting the slide rail 6 at the corresponding position of the sliding fairing at the completely opened position of the sliding fairing.

[0047] In one implementation manner of the embodiment of the present application, the first limiting mechanism 7 arranged at the dismounting opening position of each side slide rail 1 includes a first middle plug cover assembly 10 and a countersunk screw 9.

[0048] In the implementation, the first intermediate blocking cover assembly 10 comprises a slide rail opening cover 11 with an inner profile identical to that of the side slide rail 1. The connecting portion of the slide rail opening cover 11 is fixedly installed on the dismounting opening position of the side slide rail 1 by means of the countersunk screw 9, so that the slide rail portion of the slide rail opening cover 11 forms an integral slide rail with the side slide rail 1, thereby enabling the pulley 6 to slide between the side slide rail 1 and the slide rail opening cover 11. As shown in Figure 2 and Figure 3 . Figure 2 The overall structural arrangement of the side slide rail in the slide rail mechanism provided by the embodiment is shown in Figure 1 . Figure 3 The structure of the first limiting mechanism in the side slide rail provided by the embodiment is shown in Figure 2 .

[0049] Further, the first intermediate blocking cover assembly 10 of each side slide rail 1 in the implementation further comprises two limiting pins 12.

[0050] Correspondingly, the slide rail opening cover 11 is provided in an L shape, and the two limiting pins 12 are in interference fit with the holes on the connecting portion of the slide rail opening cover 11.

[0051] The limiting mode of the side slide rail 1 is as follows: when the sliding fairing is not dismounted, the slide rail opening cover 11 is fixedly connected to the side wall of the side slide rail 1 by means of the connecting portion thereof, and forms an integral slide rail with the side slide rail 1 by means of the slide rail portion thereof, and the two limiting pins 12 are located at the back side of the side wall of the side slide rail 1.

[0052] When the sliding fairing is dismounted, the countersunk screw 9 is removed to remove the first intermediate blocking cover assembly 10, the sliding fairing is slid to place the pulley 6 at the corresponding position thereof on the dismounting opening position of the side slide rail 1, and then the two limiting pins 12 on the first intermediate blocking cover assembly 10 are reversely inserted into the holes in the side wall of the side slide rail 1, so that the pulley 6 is located between the two limiting pins 12, thereby limiting the movement of the sliding fairing; wherein the second limiting mechanism of the side slide rail 1 is formed in the form of replacement of the slide rail opening cover 11 and the two limiting pins 12. As shown in Figure 4 and Figure 5 , Figure 4 The structure of the second limiting mechanism in the side slide rail provided by the embodiment is shown in Figure 2 , Figure 5 The schematic diagram of the second limiting mechanism in the side slide rail provided by the embodiment is shown in Figure 4 .

[0053] In one implementation of the embodiment, the buffer and limiting mechanism 8 on each side slide rail 1 is arranged at the end of the slide rail; the buffer and limiting mechanism 8 comprises a rubber buffer block 14 and a spring sheet 15. As shown in Figure 2 .

[0054] In this implementation, the spring sheet 15 is provided with a central concave structure, and the spring sheet 15 is connected to the side wall of the side slide rail 1 through a countersunk screw 9. The central concave structure is embedded in the slide rail through the waist-shaped hole on the slide rail surface of the side slide rail 1, and the rubber buffer block 14 is fixedly connected to the inner side of the side wall of the side slide rail 1 through a large flat round head screw 23, so that a limiting space is formed between the central concave structure of the spring sheet 15 and the rubber buffer block 14.

[0055] The buffering and limiting method of the buffering and limiting mechanism 8 of this implementation is as follows: during the opening process of the sliding fairing, the pulley 6 first collides with the spring sheet 15, and the movement of the sliding fairing is buffered by the extrusion deformation of the spring sheet 15. After the spring sheet 15 is deformed to a certain extent, the pulley 6 continues to move through the gap between the spring sheet 15 and the slide rail. Finally, the pulley 6 passes over the spring sheet 15 and hits the rubber buffer block 14, stops moving, and finally remains in the limited space formed by the concave structure in the middle of the spring sheet 15 and the rubber buffer block 14; Figure 7 shown.

[0056] Further optionally, the rubber buffer block 14 is designed with an opening with a diameter of 2 mm to further buffer the impact force of the pulley when the sliding fairing is opened.

[0057] Figure 6 for Figure 2 The schematic diagram of the structure of the buffer and limit mechanism in the side rail provided by the embodiment shown, Figure 7 for Figure 6 The illustrated embodiment provides a schematic diagram of the limiting relationship between the buffer and limiting mechanism in the side slide rail and the pulley mechanism.

[0058] In an implementation of the embodiment of the present invention, the first limiting mechanism 7 provided at the disassembly opening position of the middle slide rail 3 includes: a second middle blocking cover 17 and a countersunk screw 9 .

[0059] In this implementation, the second middle cover 17 is set to L-shaped, and its connecting part is fixed to the side wall of the firewall 5 by countersunk screws 9, so that its slide rail part and the middle slide rail 3 form an integral slideway, so that the pulley 6 slides between the middle slide rail 3 and the second middle cover 17. Figure 8 As shown, Figure 1 The illustrated embodiment provides a schematic diagram of the overall structural arrangement of the middle slide rail in the slide rail mechanism, in which the second middle blocking cover 17 and the second limiting mechanism 16 are illustrated.

[0060] In one implementation of the embodiment of the present invention, the second limiting mechanism 16 of the middle slide rail 3 includes: a Y-shaped member 19, a bracket 18, a hexagon head screw 20 and a support plate nut; Figures 8 to 10 shown.

[0061] In this implementation, the bracket 18 is riveted to the side wall of the firewall 5 and is located below the disassembly opening 21 of the middle slide rail 3 ; the lateral thickness of the bracket 18 is greater than the lateral thickness of the middle slide rail 3 .

[0062] In this implementation, the bracket 18 is provided with four screw holes below the disassembly opening 21, which are symmetrical in the upper and lower parts and in the left and right parts. Support plate nuts are installed on the screw holes; the Y-shaped part 19 is fixed to the bracket 18 by two hexagon head screws 20 arranged on the left and right.

[0063] In this implementation, the limiting method of the second limiting mechanism 16 of the middle slide rail 3 is:

[0064] When disassembling the sliding fairing, first remove the second middle cover 1, slide the sliding fairing to place the pulley 6 at the middle disassembly opening 21, remove the Y-shaped piece 19, rotate it 90 degrees counterclockwise, and fix the Y-shaped piece 19 to the bracket 18 using the two hexagonal head screws 20 arranged above and below; thus, the pulley joint 22 is constrained to the middle opening 21 of the slide rail by the Y-shaped piece 19. Figure 10 As shown, Figure 9 The illustrated embodiment provides a structural diagram of a second limiting mechanism in the middle slide rail for limiting the pulley.

[0065] The slide rail mechanism for a helicopter sliding fairing provided by an embodiment of the present invention, on the one hand, consists of three slide rails arranged in a herringbone shape, providing a structural form of a three-slide rail arrangement, the slide rail mechanism being installed on a fixed platform, and a group of pulley mechanisms installed on the sliding fairing sliding on it, and the fairing is opened and closed by the rolling of the pulleys in the slide rails; the middle disassembly opening of each slide rail in the slide rail mechanism is used for the pulleys of the sliding fairing to be disengaged upward; on the other hand, a disassembly method for the sliding fairing is provided, and when the helicopter sliding fairing is hoisted and disassembled in the field, the whole cannot be fixed due to the influence of the strong wind environment. The flow cover causes the pulley to often be misaligned with the slide rail opening, resulting in damage to the sliding fairing, pulley, and slide rail. This problem is solved by setting a second limit mechanism on each slide rail; on the other hand, strong winds and improper operation of the operator can easily cause the sliding cover to open at too high a speed, which has too much impact on the slide rail and causes damage to the pulley and slide rail parts. The buffering effect of the buffer and limit mechanism on the two symmetrically arranged side slide rails eliminates the occurrence of this problem; in addition, the setting of the second limit mechanism can ensure that the sliding fairing is always in the open position when there is wind outside, ensuring the safety of the maintenance personnel and the working space.

[0066] The slide rail mechanism provided by the embodiment of the present invention ensures that the sliding fairing can be directly disassembled and assembled from the middle by arranging a disassembly and assembly opening in the middle of the slide rail, avoiding interference with the front end and / or rear end structure of the sliding fairing, and effectively solving the problem of difficult or impossible disassembly and assembly; and through the reasonable design of the slide rail disassembly and assembly opening cover, the risk of the slide rail possibly escaping from the opening during the sliding process is solved; through the reasonable design of the pulley limiting mechanism, the problem of the pulley and the slide rail disassembly and assembly opening being unable to be aligned when disassembling and assembling the sliding cover is solved.

[0067] The following is a schematic illustration of an implementation example of the slide rail mechanism for a helicopter sliding fairing provided by an embodiment of the present invention.

[0068] Implementation Example

[0069] Reference Figures 1 to 10 The slide rail mechanism provided in this embodiment includes three slide rails, namely the right slide rail 1, the left slide rail 2, and the middle slide rail 3. The right slide rail 1 and the left slide rail 2 are fixedly mounted on the power platform 4 by screws, and the right slide rail 1 and the left slide rail 2 are symmetrically arranged; the middle slide rail 3 is fixed to the longitudinal firewall 5 by screws, as shown in FIG. Figure 1 As shown, the firewall 5 is vertically arranged on the extension line of the central axis of the power platform 4, and the installation position of the firewall 5 is close to the engine.

[0070] like Figure 1 As shown, a disassembly and assembly opening is provided in the middle of each slide rail, and when disassembling and installing the sliding fairing, the pulley 6 at the corresponding position on the sliding fairing is removed from and installed in the disassembly and assembly opening of the slide rail at the corresponding position.

[0071] The slide rail mechanism provided in this embodiment has the following specific limiting mechanism:

[0072] Limiting mechanism 1: To prevent the risk of the pulley 6 falling out of the slide rail during use, a first limiting mechanism 7 is designed at the disassembly opening position of each slide rail; wherein, the first limiting mechanism 7 on the right side slide rail 1 and the left side slide rail 2 is specifically a first intermediate blocking cover assembly 10, such as Figure 3 As shown, the first limiting mechanism 7 on the middle slide rail 3 is specifically a second middle blocking cover assembly 17, as shown in FIG. Figure 8 As shown;

[0073] Limiting mechanism 2: In order to ensure that the pulley 6 is accurately fixed at the disassembly opening position of each slide rail when the sliding fairing is disassembled, each slide rail in the sliding mechanism is also provided with a second limiting mechanism. The right slide rail 1 and the left slide rail 2 respectively fix the pulley 6 at the disassembly opening position of the slide rail through two limiting pins 12, and the middle slide rail 3 fixes the pulley joint 22 through the Y-shaped piece 19 to keep it at the disassembly opening position of the middle slide rail 3.

[0074] Buffering and limiting mechanism: Buffering and limiting mechanisms are designed at the ends of the right side slide rail 1 and the left side slide rail 2, for example, including: a rubber buffer block 14 and a spring sheet 15, which are used to buffer and limit the sliding fairing when it slides open to the maximum opening position.

[0075] The limiting mechanisms on the slide rails in the embodiments of the present invention are described in detail as follows:

[0076] (1) The left side slide rail 2 is provided with a first limiting mechanism 7, a second limiting mechanism, and a buffer and limiting mechanism 8. Since the structures of the limiting mechanisms in the right side slide rail 1 in the embodiment of the present invention are exactly the same as those in the left side slide rail 2, the left side slide rail 2 is used as an example for explanation.

[0077] 1.1, the first limiting mechanism 7 on the left side slide rail 2;

[0078] like Figure 2 As shown, the first limiting mechanism 7 in the left side slide rail includes a first intermediate blocking cover assembly 10 and a countersunk screw 9, wherein the inner surface of the slide rail opening cover 11 in the first intermediate blocking cover assembly 10 is designed to be consistent with the inner surface of the left side slide rail 2 to ensure smooth sliding of the pulley 6. The slide rail opening cover 11 is fixedly connected to the left side slide rail 2 by a countersunk screw 9, as shown in FIG. Figure 3 As shown;

[0079] 1.2, the second limiting mechanism on the left side slide rail 2;

[0080] The first intermediate cover assembly 10 is composed of a slide rail opening cover 11 and a positioning pin 12. The positioning pin 12 and the hole of the slide rail opening cover 11 are set to be interference fit and are installed together by hot and cold methods. Figure 4 As shown; when the sliding fairing is not removed, the first intermediate blocking cover assembly 10 is fixedly connected to the side wall of the left side slide rail 2 by the countersunk screw 9; when the sliding fairing is removed, the first intermediate blocking cover assembly 10 is first removed, and the pulley 6 at the corresponding position is placed in the middle disassembly opening position by sliding the sliding fairing, and then the positioning pin 12 on the intermediate blocking cover assembly 10 is reversely inserted into the opening on the side wall of the left side slide rail 2. At this time, the pulley 6 is located between the two positioning pins 12, which constrains the movement of the fairing, as shown Figure 5 shown.

[0081] 1.3, buffer and limit mechanism 8 on the left side slide rail 2;

[0082] The buffer and limiting mechanism 8 of the left slide rail 2 includes a rubber buffer block 14 and a spring sheet 15, the spring sheet 15 is provided with a middle concave structure, the spring sheet 15 is connected to the side wall of the left slide rail 2 through a countersunk screw 9, the middle concave structure is embedded in the slide rail through a waist-shaped hole of the slide rail surface of the left slide rail 2, and the rubber buffer block 14 is fixedly connected to the side wall of the left slide rail 2 through a large flat head screw 23, as shown in Figure 6 , a limiting space is formed between the middle concave structure of the spring sheet 15 and the rubber buffer block 14; in the opening process of the sliding fairing, the pulley 6 first collides with the spring sheet 15, the movement of the sliding fairing is buffered through the extrusion deformation of the spring sheet 15, when the spring sheet 15 is deformed to a certain degree, the pulley 6 continues to move through the gap between the spring sheet 15 and the slide rail, finally, the pulley 6 collides with the rubber buffer block 14 after passing through the spring sheet 15, stops moving, and is finally kept in the limiting space formed by the middle concave structure of the spring sheet 15 and the rubber buffer block 14, as shown in Figure 7 ; a 2mm diameter opening is designed on the rubber buffer block 14, for further buffering the impact force of the pulley when the sliding fairing is opened.

[0083] (2) The middle slide rail 3 is provided with a first limiting mechanism 7 and a second limiting mechanism 16:

[0084] 2.1, the first limiting mechanism 7 on the middle slide rail 3;

[0085] As shown in Figure 8 , the first limiting mechanism 7 in the middle slide rail 3 includes a second middle plug cover 17 and a countersunk screw 9; the second middle plug cover 17 is provided as an L-shaped, and its connecting part is fixedly installed on the side wall of the firewall 5 by the countersunk screw 9, so that its slide rail part forms an integral slide with the middle slide rail 3, so that the pulley 6 slides between the middle slide rail 3 and the second middle plug cover 17; as shown in Figure 8 .

[0086] 2.2, the middle slide rail 3 is designed with a second limiting mechanism 16, as shown in Figure 8 ; the second limiting mechanism 16 of the middle slide rail 3 is composed of a Y-shaped piece 19 and a bracket 18, the bracket 18 is riveted to the side wall of the firewall 5 and located below the disassembly opening 21 position of the middle slide rail 3; in addition, the lateral thickness of the bracket 18 is greater than the lateral thickness of the middle slide rail 3, for example, protruding 1mm, four screw holes are designed on the bracket 18, which are symmetrically arranged up and down and left and right, and a supporting plate nut is installed at the screw hole, the Y-shaped piece 19 is installed on the bracket 18 through left and right two hexagonal head screws 20, as shown in Figure 9 .

[0087] When disassembling the sliding fairing, first disassemble the second intermediate plug 17, place the pulley 6 in the middle disassembly opening 21 position by sliding the sliding fairing, disassemble the Y-shaped piece 19, rotate it counterclockwise by 90 degrees, then fix the Y-shaped piece 19 on the support 18 through the two hexagonal head screws 20 arranged above and below, and use the Y-shaped piece 19 to constrain the pulley joint 22 at the middle opening 21 position of the slide rail, as shown in Figure 10

[0088] Although the embodiments of the present application are disclosed as above, the content is only for the purpose of facilitating the understanding of the present application, and is not intended to limit the present application. Any person skilled in the art of the present application can make any modification and change in the form and details without departing from the spirit and scope of the present application disclosed, but the patent protection scope of the present application shall be subject to the scope defined by the appended claims.​

Claims

1. A skid mechanism for a sliding fairing of a helicopter, characterized in that, The utility model relates to a kind of sliding fairing, including: 3 slide rails, respectively: 2 side slide rails (1) fixedly installed on power platform (4), and symmetrically arranged, middle slide rail (3) fixedly installed on the side wall of fire wall (5) side; Wherein, each slide rail is installed along the direction of sailing parallel, and the middle position of each slide rail is provided with dismounting opening, for the corresponding position of the pulley (6) of sliding fairing when sliding on the corresponding position of slide rail, from dismounting opening and enter, and each dismounting opening position is provided with middle blocking cover component, to prevent the pulley (6) of sliding fairing from corresponding position of slide rail in the process of sliding; Each slide rail is provided with first limiting mechanism (7) for preventing the pulley (6) of corresponding position of sliding fairing from the dismounting opening position of this slide rail;Each slide rail is also provided with second limiting mechanism for limiting the pulley (6) of corresponding position of sliding fairing in this slide rail dismounting opening position;And each side slide rail (1) is provided with buffer and limiting mechanism (8) for limiting the pulley (6) of corresponding position of sliding fairing in sliding fairing completely open position; The first limiting mechanism (7) of the dismounting opening position of each side slide rail (1) includes: first middle blocking cover component (10) and countersunk screw (9);Wherein, the first middle blocking cover component (10) includes: slide rail opening cover (11) with the inside profile of side slide rail (1) identical, the connecting part of slide rail opening cover (11) is fixedly installed on the dismounting opening position of side slide rail (1) by countersunk screw (9), so that its slide rail part forms integral slide with side slide rail (1), so that the pulley (6) slides between side slide rail (1) and slide rail opening cover (11); The first middle blocking cover component (10) of each side slide rail (1) also includes: two limiting pins (12);Slide rail opening cover (11) is provided as L type, and two limiting pins (12) are interference fit with the hole on the connecting part of slide rail opening cover (11);The limiting mode of side slide rail (1) is: when not dismounting sliding fairing, slide rail opening cover (11) is fixedly connected on the side wall of side slide rail (1) by its connecting part, forms integral slide with side slide rail (1) by its slide rail part, and two limiting pins (12) are located on the back side of the side wall of side slide rail (1); When dismounting sliding fairing, remove countersunk screw (9) to remove first middle blocking cover component (10), by sliding sliding fairing, the pulley (6) of corresponding position of sliding fairing is placed in the dismounting opening position of side slide rail (1), then two limiting pins (12) on first middle blocking cover component (10) are inserted into the aperture of side wall of side slide rail (1) reversely, so that the pulley (6) is located between two limiting pins (12), thereby limiting the movement of sliding fairing;Wherein, the second limiting mechanism of side slide rail (1) is formed by the replacement form of slide rail opening cover (11) and two limiting pins (12); The buffer and limiting mechanism (8) on each side rail (1) is arranged at the end of the rail; the buffer and limiting mechanism (8) comprises a rubber buffer block (14) and a spring sheet (15); wherein the spring sheet (15) is provided with a middle concave structure, the spring sheet (15) is connected to the side wall of the side rail (1) by a countersunk screw (9), the middle concave structure is embedded in the rail through the waist-shaped hole of the rail surface of the side rail (1), and the rubber buffer block (14) is fixedly connected to the inner side of the side wall of the side rail (1) by a large flat head screw (23), so that a limiting space is formed between the middle concave structure of the spring sheet (15) and the rubber buffer block (14).

2. The sliding rail mechanism for the sliding fairing of a helicopter according to claim 1, characterized in that, With the buffer and limiting mechanism (8), during the opening of the sliding fairing, the pulley (6) first collides with the spring sheet (15), the movement of the sliding fairing is buffered through the extrusion deformation of the spring sheet (15), when the spring sheet (15) is deformed to a certain extent, the pulley (6) continues to move through the gap between the spring sheet (15) and the rail, finally, the pulley (6) collides with the rubber buffer block (14) after passing over the spring sheet (15), stops moving, and is finally kept in the limiting space formed by the middle concave structure of the spring sheet (15) and the rubber buffer block (14).

3. The skid rail mechanism for a helicopter sliding fairing according to claim 1, characterized in that, The first limiting mechanism (7) arranged at the disassembly opening position of the intermediate rail (3) comprises a second intermediate plug cover (17) and a countersunk screw (9); Wherein, the second intermediate plug cover (17) is arranged in an L shape, and its connecting part is fixedly installed on the side wall of the firewall (5) by a countersunk screw (9), so that its rail part forms an integral slide with the intermediate rail (3), so that the pulley (6) slides between the intermediate rail (3) and the second intermediate plug cover (17).

4. The skid mechanism for a sliding fairing of a helicopter according to claim 3, characterized in that, The second limiting mechanism (16) of the intermediate rail (3) comprises a Y-shaped piece (19), a bracket (18), a hexagonal head screw (20) and a supporting plate nut; Wherein, the bracket (18) is riveted on the side wall of the firewall (5) and located below the disassembly opening (21) position of the intermediate rail (3); the lateral thickness of the bracket (18) is greater than the lateral thickness of the intermediate rail (3); The bracket (18) is provided with four screw holes below the disassembly opening (21), which are symmetrically arranged up and down and left and right, and the supporting plate nut is installed on the screw hole; the Y-shaped piece (19) is fixed on the bracket (18) by the left and right arranged two hexagonal head screws (20).

5. The skid mechanism for a sliding fairing of a helicopter according to claim 4, characterized in that, The limiting mode of the second limiting mechanism (16) of the intermediate rail (3) is: When disassembling the sliding fairing, first disassemble the second intermediate plug cover (17), place the pulley (6) at the disassembly opening (21) position by sliding the sliding fairing, disassemble the Y-shaped piece (19), rotate it counterclockwise by 90 degrees, and then fix the Y-shaped piece (19) on the bracket (18) by the upper and lower arranged two hexagonal head screws (20); so as to constrain the pulley joint (22) at the rail disassembly opening (21) position by the Y-shaped piece (19).

6. A helicopter sliding fairing, characterized in that, It comprises: Three sets of pulleys (6) are arranged on the sliding fairing, and the slide rail mechanism for the sliding fairing of the helicopter is arranged on the body platform, as claimed in any one of claims 1-5. The slide rail mechanism comprises three slide rails, i.e., two side slide rails (1) fixedly installed on the power platform (4) and symmetrically arranged, and a middle slide rail (3) fixedly installed on the side wall of the fire wall (5).

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