A kind of single-sided connection and double-sided anti-loose structure for the pin connected with the wing

Abstract

The application relates to the technical field of aircraft design, and aims at a structure connection scheme related to the connection between an underwing engine hoisting over-determinate hoisting box section and a wing box transition part, and provides a pin one-side connection and double-side anti-loosening structure for connecting the hoisting box section and the wing box. Through the combination of a supporting plate nut and a limiting belt plate, indirect assembly of the limiting belt plate and a side connecting rod, the mobility, self-locking property of the supporting plate nut and the adjustability of the limiting belt plate, and the assembly compensation function of an eccentric bushing shaft hole, the rotation of the supporting plate nut and the connecting bolt is respectively limited by the limiting belt plate and a fuse under the premise of ensuring the adjustable installation of the hoisting side connecting rod, and the one-side installation of the pin and the double-side anti-loosening of the connection part are realized.

Description

Technical Field

[0001] This application relates to the field of aircraft design technology, and proposes a single-sided pin connection and double-sided anti-loosening structure for connecting the underwing engine statically indeterminate pylon section and the wing box transition part. Background Technology

[0002] The underwing engine pylon box section, located between the engine and the wing, is a key component for load transfer and vibration isolation. The pylon box section and the wing box are generally connected by a combination of multiple sets of linkages and joints to achieve statically determinate or statically indeterminate constraint connections between the structures.

[0003] For the connection method of the sling box section and wing box section using statically indeterminate constraints (referred to as: statically indeterminate sling), the load transfer between the sling box section structure and the wing is generally completed through the upper connecting rod, diagonal brace, middle joint and side connecting rod, so as to realize the multi-force transmission path design requirements of the airworthiness clause CCAR25.571 for key connection parts.

[0004] For the assembly sequence of the statically indeterminate suspension, the first step is to install the pin assemblies at the connection points of the center joint, upper connecting rod, and diagonal brace in the vertical plane of the flight direction, followed by the installation of the pin assemblies at the side connecting rod connections. In this process, in addition to being affected by manufacturing and assembly errors of the parts, the limited structural operating space also presents additional difficulties for the installation of the side connecting rods and pin assemblies.

[0005] The design of the side link and pin assembly connection for statically indeterminate suspensions must meet environmental conditions and airworthiness requirements. It must compensate for errors caused by various factors, allow for installation in confined spaces, and account for bolt loosening and detachment due to vibration, thus meeting the anti-loosening requirements of CCAR25.607. Therefore, the connection design of the side link and pin assembly affects the assembly processability and airworthiness safety of the statically indeterminate suspension structure. Summary of the Invention

[0006] The purpose of this application is to provide a single-sided connection and double-sided anti-loosening structure for a pin used to connect a suspension to an aircraft wing, which can effectively solve the assembly operation difficulties and error compensation problems in the prior art.

[0007] This application adopts the following technical solution:

[0008] By integrating the single-sided connection function of the integrated support plate nut, the support plate nut is indirectly connected to the side connecting rod using a limiting plate, realizing the single-sided installation operation of the side connecting rod pin and reducing the requirement for operating space; by using the fuse to limit the relative movement of the bolt and the self-locking function of the support plate nut, the rotation of the support plate nut and the connecting bolt are limited by the limiting plate and the fuse respectively, realizing the single-sided connection of the pin and the double-sided anti-loosening function of the connection part.

[0009] According to one aspect of this application, a pin single-sided connection and double-sided anti-loosening structure for connecting a suspension box assembly 100 and a wing box assembly 200 is provided.

[0010] Includes side link connection assembly 500;

[0011] The side link assembly 500 includes a front side link assembly 300 and a rear side link assembly 400.

[0012] The front side link assembly 300 includes a side link_front 301, an inner bushing_lower 302a, an inner bushing_upper 302b, a bushing adjusting band plate_front 303, a bolt 304, a support plate nut_lower 305a, a support plate nut_upper 305b, a limiting band plate_lower 306a, a limiting band plate_upper 306b, an end cap_lower 307a, an end cap_upper 307b, and a nut 308;

[0013] The rear side rod assembly 400 includes a side connecting rod_rear 401, an inner bushing_lower 402a, an inner bushing_upper 402b, a bushing adjusting band plate_rear 403, a bolt 404, a fuse 407, and a nut 408.

[0014] The hanging box section assembly 100 consists of a hanging middle joint 101a, a hanging middle joint 101b, an upper connecting rod 102, and a diagonal brace 103;

[0015] The wing box assembly 200 consists of a wing center joint 201a, a wing center joint 201b, and a wing side connecting rod joint 204.

[0016] The front side link assembly 300 is arranged on the forward side of the location where the wing side link joint 204 and the middle joint 101a of the hanging box section are located.

[0017] The rear side link assembly 400 is arranged on the heading rear side at the location of the wing side link joint 204 and the pylon box section joint 101a.

[0018] The pin includes an upper single-sided pin and a lower single-sided pin;

[0019] The upper single-sided pin consists of upper pin 405b and connecting bolt 406b;

[0020] The upper pin 405b has a protrusion at its front end, and the connecting bolt 406b passes through the upper pin 405b, with the end of the connecting bolt 406b able to protrude through the protrusion at the front end of the upper pin 405b.

[0021] The lower single-sided pin consists of a lower pin 405a and a connecting bolt lower 406a;

[0022] The lower pin 405a has a protrusion at its front end, and the connecting bolt 406a passes through the lower pin 405a. The end of the connecting bolt 406a can protrude through the protrusion at the front end of the lower pin 405a.

[0023] The side connecting rod_front 301 has a bolt hole in the middle and grooves at both ends, which cooperate with the inner bushing_lower 302a and the inner bushing_upper 302b;

[0024] The side connecting rod_rear 401 includes inner bushing_lower 402a and inner bushing_upper 402b, with a bolt hole in the middle position;

[0025] The bushing adjusting band plate_front 303 has a bolt hole at one end and a hole at the other end that allows the lower pin 405a to pass through.

[0026] The bushing adjusting plate_rear 403 has a bolt hole at one end and a hole at the other end that allows the lower pin 405a to pass through.

[0027] The hanging joint 101a and hanging joint 101b are provided with holes through which the lower pin 405a can pass;

[0028] The wing side connecting rod joint 204 is provided with a hole through which the upper pin 405b can pass;

[0029] The lower limit plate 306a and the upper limit plate 306b are provided with an elongated hole at one end and a through hole at the other end;

[0030] The lower single-sided pin passes through the inner bushing_lower 402a, the bushing adjusting plate_rear 403 through the hole that allows the lower pin 405a to pass through, the hanging joint 101a through the hole that allows the lower pin 405a to pass through, the bushing adjusting plate_front 303 through the hole that allows the lower pin 405a to pass through, and the inner bushing_lower 302a. The connecting bolt_lower 406a passes through the protruding end of the lower pin 405a and passes through the through hole of the end cover_lower 307a and the limiting plate_lower 306a to connect with the support plate nut_lower 305a.

[0031] The upper single-sided pin passes sequentially through the inner bushing_upper 402b, the hole on the wing side connecting rod joint 204 that allows the upper pin 405b to pass through, the inner bushing_upper 302b, the end cap_upper 307b, and the through hole of the limiting band plate_upper 306b, and connects to the support plate nut_upper 305b.

[0032] The bolt 304 passes sequentially through the bolt hole of the bushing adjusting plate_front 303, the bolt hole of the side connecting rod_front 301, the elongated hole of the limiting plate_lower 306a, and the elongated hole of the limiting plate_upper 306b, and connects to the nut 308.

[0033] The bolt 404 passes sequentially through the bolt hole of the bushing adjusting plate, the bolt hole of the connecting rod at the rear 403, and the bolt hole of the rear 401, and is connected to the nut 408.

[0034] The bolt heads of the lower connecting bolt 406a and the upper connecting bolt 406b are connected by a fuse 407 to prevent loosening of the bolts on the rear side of the heading.

[0035] By utilizing the elongated hole features of the lower limit plate 306a and the upper limit plate 306b, the relative positions of the support plate nuts 305a and 305b on the side connecting rod front 301 are adjusted to compensate for assembly errors. At the same time, the support plate nuts 305a and 305b are indirectly connected to the side connecting rod front 301 through bolts 304 and nuts 308, thus preventing the connection of the support plate nuts 305a and 305b on the forward side of the flight path from loosening.

[0036] The anti-loosening function of the front side plate nuts 305a and 305b can also be achieved by simplifying the structural connection method, such as directly assembling the plate nuts 305a and 305b onto the side connecting rod front 301 through the end cap_lower 307a and end cap_upper 307b respectively.

[0037] "Front" refers to the forward direction of the flight path, "rear" refers to the backward direction of the flight path, and "up" and "down" refer to the relative up and down directions in the vertical direction of the flight path.

[0038] The advantages of this application are:

[0039] 1. Easy installation. Enables single-sided installation of the side link pin, reducing the need for operating space, simplifying the operation of side link connection assembly in confined spaces, and improving assembly processability.

[0040] 2. Assembly Compensation. The integrated eccentric bushing structure provides error compensation, enhancing the interchangeability of the side connecting rods and compensating for manufacturing and assembly errors in the side connecting rods and related parts.

[0041] 3. Dual-sided anti-loosening. The method of implementing anti-loosening for side connecting rod pins is simplified, allowing for single-sided installation while achieving dual-sided anti-loosening function, meeting the anti-loosening requirements of CCAR25.607 for critical parts.

[0042] 4. Compact structure. It solves the limitations of traditional connection schemes on the connection direction and length of pins, has good applicability, and improves design flexibility. Attached Figure Description

[0043] Figure 1 This is a schematic diagram showing the connection between the statically indeterminate suspension and the wing.

[0044] Figure 2 This is a partial schematic diagram of the side linkage connection (rear part when heading left).

[0045] Figure 3This is a partial schematic diagram of the side linkage connection (rear left side during heading).

[0046] Figure 4 The AA section is the side link connection on the left side of the heading.

[0047] Figure 5 BB section detail of the hanging joint connection;

[0048] Among them, 100 is the suspension box section assembly, 101a is the suspension center joint, 101b is the suspension center joint, 102 is the upper connecting rod, 103 is the diagonal brace, 200 is the wing box assembly, 201a is the wing center joint, 201b is the wing center joint, 204 is the wing side connecting rod joint, 300 is the front side connecting rod assembly, 301 is the front side connecting rod, 302a is the lower inner bushing, 302b is the upper inner bushing, 303 is the front bushing adjusting plate, 304 is the bolt, 305a is the lower support plate nut, and 305b is the lower support plate nut. Upper, 306a Limiting plate_lower, 306b Limiting plate_upper, 307a End cap_lower, 307b End cap_upper, 308 Nut, 400 Rear side rod assembly, 401 Side connecting rod_rear, 402a Inner bushing_lower, 402b Inner bushing_upper, 403 Bushing adjusting plate_rear, 404 Bolt, 405a Lower pin, 405b Upper pin, 406a Connecting bolt_lower, 406b Connecting bolt_upper, 407 Fuse, 408 Nut, 500 Side connecting rod connecting assembly. Detailed Implementation

[0049] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0050] Example 1

[0051] A pin-on-one connection and double-sided anti-loosening structure for connecting a suspension box assembly 100 and a wing box assembly 200;

[0052] Includes side link connection assembly 500;

[0053] The side link assembly 500 includes a front side link assembly 300 and a rear side link assembly 400.

[0054] The front side link assembly 300 includes a side link_front 301, an inner bushing_lower 302a, an inner bushing_upper 302b, a bushing adjusting band plate_front 303, a bolt 304, a support plate nut_lower 305a, a support plate nut_upper 305b, a limiting band plate_lower 306a, a limiting band plate_upper 306b, an end cap_lower 307a, an end cap_upper 307b, and a nut 308;

[0055] The rear side rod assembly 400 includes a side connecting rod_rear 401, an inner bushing_lower 402a, an inner bushing_upper 402b, a bushing adjusting band plate_rear 403, a bolt 404, a fuse 407, and a nut 408.

[0056] The hanging box section assembly 100 consists of a hanging middle joint 101a, a hanging middle joint 101b, an upper connecting rod 102, and a diagonal brace 103;

[0057] The wing box assembly 200 consists of a wing center joint 201a, a wing center joint 201b, and a wing side connecting rod joint 204.

[0058] The front side link assembly 300 is arranged on the forward side of the location where the wing side link joint 204 and the middle joint 101a of the hanging box section are located.

[0059] The rear side link assembly 400 is arranged on the heading rear side at the location of the wing side link joint 204 and the pylon box section joint 101a.

[0060] The pin includes an upper single-sided pin and a lower single-sided pin;

[0061] The upper single-sided pin consists of upper pin 405b and connecting bolt 406b;

[0062] The upper pin 405b has a protrusion at its front end, and the connecting bolt 406b passes through the upper pin 405b, with the end of the connecting bolt 406b able to protrude through the protrusion at the front end of the upper pin 405b.

[0063] The lower single-sided pin consists of a lower pin 405a and a connecting bolt lower 406a;

[0064] The lower pin 405a has a protrusion at its front end, and the connecting bolt 406a passes through the lower pin 405a. The end of the connecting bolt 406a can protrude through the protrusion at the front end of the lower pin 405a.

[0065] The side connecting rod_front 301 has a bolt hole in the middle and grooves at both ends, which cooperate with the inner bushing_lower 302a and the inner bushing_upper 302b;

[0066] The side connecting rod_rear 401 includes inner bushing_lower 402a and inner bushing_upper 402b, with a bolt hole in the middle position;

[0067] The bushing adjusting band plate_front 303 has a bolt hole at one end and a hole at the other end that allows the lower pin 405a to pass through.

[0068] The bushing adjusting plate_rear 403 has a bolt hole at one end and a hole at the other end that allows the lower pin 405a to pass through.

[0069] The hanging joint 101a and hanging joint 101b are provided with holes through which the lower pin 405a can pass;

[0070] The wing side connecting rod joint 204 is provided with a hole through which the upper pin 405b can pass;

[0071] The lower limit plate 306a and the upper limit plate 306b are provided with an elongated hole at one end and a through hole at the other end;

[0072] The lower single-sided pin passes through the inner bushing_lower 402a, the bushing adjusting plate_rear 403 through the hole that allows the lower pin 405a to pass through, the hanging joint 101a through the hole that allows the lower pin 405a to pass through, the bushing adjusting plate_front 303 through the hole that allows the lower pin 405a to pass through, and the inner bushing_lower 302a. The connecting bolt_lower 406a passes through the protruding end of the lower pin 405a and passes through the through hole of the end cover_lower 307a and the limiting plate_lower 306a to connect with the support plate nut_lower 305a.

[0073] The upper single-sided pin passes sequentially through the inner bushing_upper 402b, the hole on the wing side connecting rod joint 204 that allows the upper pin 405b to pass through, the inner bushing_upper 302b, the end cap_upper 307b, and the through hole of the limiting band plate_upper 306b, and connects to the support plate nut_upper 305b.

[0074] The bolt 304 passes sequentially through the bolt hole of the bushing adjusting plate_front 303, the bolt hole of the side connecting rod_front 301, the elongated hole of the limiting plate_lower 306a, and the elongated hole of the limiting plate_upper 306b, and connects to the nut 308.

[0075] The bolt 404 passes sequentially through the bolt hole of the bushing adjusting plate, the bolt hole of the connecting rod at the rear 403, and the bolt hole of the rear 401, and is connected to the nut 408.

[0076] The bolt heads of the lower connecting bolt 406a and the upper connecting bolt 406b are connected by a fuse 407 to prevent loosening of the bolts on the rear side of the heading.

[0077] The side linkage assembly 500 described in this application has a symmetrical structure. Regarding the... Figure 1 The planes of symmetry in the middle are completely symmetrical.

[0078] Furthermore, if the inner bushing_lower 302a is designed as an eccentric bushing according to requirements, it can be adjusted by the bushing adjustment plate_front 303, and can be connected to the side connecting rod_front 301 by the shared bolt 304 and nut 308, so as to achieve the combination of structural anti-loosening and bushing self-aligning functions.

[0079] Inside the rear side link assembly 400, if the inner bushing_lower 402a is designed as an eccentric bushing according to requirements, it can be adjusted by the bushing adjustment plate_rear 403, and can be connected to the side link_rear 401 by the shared bolt 404 and nut 408.

[0080] Furthermore, the lower pin 405a and the upper pin 405b are connected to the corresponding support plate nuts 305a and 305b respectively by connecting bolts_upper 406a and connecting bolts_lower 406b, thus realizing the single-sided installation of the pins; at the same time, in this embodiment, the bolt heads of connecting bolts_upper 406a and connecting bolts_lower are connected by fuse 407 to achieve the anti-loosening function of the bolts on the rear side of the heading.

[0081] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any modifications or substitutions made by those skilled in the art within the scope of the technology disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pin-based single-sided connection and double-sided anti-loosening structure for suspending and connecting to an aircraft wing, characterized in that, The pins used for connecting the hanging box section assembly (100) and the wing box assembly (200) have single-sided connection and double-sided anti-loosening; Includes the side link connection assembly (500); The side link assembly (500) includes a front side link assembly (300) and a rear side link assembly (400). The front side link assembly (300) includes a side link_front (301), an inner bushing_lower (302a), an inner bushing_upper (302b), a bushing adjusting band plate_front (303), a bolt (304), a support plate nut_lower (305a), a support plate nut_upper (305b), a limiting band plate_lower (306a), a limiting band plate_upper (306b), an end cap_lower (307a), an end cap_upper (307b), and a nut (308). The rear side rod assembly (400) includes a rear side connecting rod (401), a lower inner bushing (402a), an upper inner bushing (402b), a rear bushing adjusting band plate (403), two bolts (404), a lower pin (405a), an upper pin (405b), a lower connecting bolt (406a), an upper connecting bolt (406b), a fuse (407), and two nuts (408). The hanging box section assembly (100) consists of a first hanging joint (101a), a second hanging joint (101b), an upper connecting rod (102), and a diagonal brace (103); The wing box assembly (200) consists of wing center joint one (201a), wing center joint two (201b), and wing side link joint (204); The front side link assembly (300) is arranged on the forward side of the wing side link joint (204) and the sling joint one (101a); The rear side rod assembly (400) is arranged on the yaw rear side of the location of the wing side link joint (204) and the suspension mid-joint (101a); The pin includes an upper single-sided pin and a lower single-sided pin; The upper single-sided pin consists of an upper pin (405b) and a connecting bolt (406b); The upper pin (405b) has a protrusion at its front end, and the connecting bolt (406b) passes through the upper pin (405b). The end of the connecting bolt (406b) can protrude through the protrusion at the front end of the upper pin (405b). The lower single-sided pin consists of a lower pin (405a) and a connecting bolt (406a); The lower pin (405a) has a protrusion at its front end, and the connecting bolt (406a) passes through the lower pin (405a). The end of the connecting bolt (406a) can protrude through the protrusion at the front end of the lower pin (405a). The side connecting rod_front (301) has a bolt hole at the middle position and grooves at both ends, which cooperate with the inner bushing_lower (302a) and the inner bushing_upper (302b); The side connecting rod_rear (401) includes inner bushing_lower two (402a) and inner bushing_upper two (402b), with a bolt hole in the middle position; The bushing adjusting band plate has a bolt hole at one end and a hole at the other end that allows the lower pin (405a) to pass through. The bushing adjusting band plate (403) has a bolt hole at one end and a hole at the other end that allows the lower pin (405a) to pass through. The first and second (101b) of the hanging joints are provided with holes through which the lower pin (405a) can pass; The wing side linkage joint (204) is provided with a hole through which the upper pin (405b) can pass; The lower (306a) and upper (306b) limit plates are provided with an elongated hole at one end and a through hole at the other end; The lower single-sided pin passes through the holes of the inner bushing_lower two (402a), the bushing adjusting band plate_rear (403) through which the lower pin (405a) can pass, the hole of the hanging joint one (101a) through which the lower pin (405a) can pass, the hole of the bushing adjusting band plate_front (303) through which the lower pin (405a) can pass, and the inner bushing_lower one (302a). The connecting bolt_lower (406a) passes through the protruding end of the lower pin (405a) and passes through the through hole of the end cover_lower (307a) and the limiting band plate_lower (306a) to connect with the support plate nut_lower (305a). The upper single-sided pin passes through the hole on the inner bushing_upper two (402b), the wing side connecting rod joint (204) through which the upper pin (405b) can pass, the inner bushing_upper one (302b), the end cap_upper (307b), the limit band plate_upper (306b) through the through hole and connects to the support plate nut_upper (305b).

2. The pin-based single-sided connection and double-sided anti-loosening structure for suspending and connecting to the wing as described in claim 1, characterized in that, The bolt 1 (304) passes through the bolt hole of the bushing adjusting plate_front (303), the bolt hole of the side connecting rod_front (301), the elongated hole of the limiting plate_lower (306a), and the elongated hole of the limiting plate_upper (306b) in sequence and connects with the nut 1 (308).

3. The pin-based single-sided connection and double-sided anti-loosening structure for suspending and connecting to the wing as described in claim 2, characterized in that, The second bolt (404) passes through the bolt hole of the bushing adjusting plate (403) and the bolt hole of the side connecting rod (401) in sequence and is connected to the second nut (408).

4. The pin-based single-sided connection and double-sided anti-loosening structure for suspending and connecting to the wing as described in claim 2, characterized in that, The bolt heads of the lower connecting bolt (406a) and the upper connecting bolt (406b) are connected by a fuse (407) to prevent loosening of the bolts on the rear side of the heading.

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