An adaptive latch support structure

Abstract

The application belongs to the field of aircraft structure design, and particularly relates to a self-adaptive bolt lock support structure. The structure comprises: a movable support fixedly installed on a cabin door, a first joint provided on the movable support, an installation hole provided on the first joint, and a joint bearing installed in the installation hole; a limiting stopper fixedly connected with the movable support, the limiting stopper having a first limiting part and a second limiting part, the first limiting part limiting the deflection angle of the inner ring of the joint bearing, and the second limiting part limiting the outer ring of the joint bearing; a fixed support fixedly installed on an aircraft body, a second joint provided on the fixed support, a bolt hole provided on the second joint, the bolt hole being aligned with the joint bearing hole when the cabin door is closed; and a bolt passing through the joint bearing hole and the bolt hole to complete locking. The application is provided with the limiting stopper on both sides of the movable support, which can prevent the joint bearing from being pulled out when the bolt is inserted, and prevent the joint bearing from being deflected too much to block the bolt hole.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of aircraft structure design, and particularly relates to a self-adaptive latch support structure. BACKGROUND

[0002] A certain transport aircraft has an oversized cargo door, the door moves in a fixed-axis rotation, and some of the locking points are far away from the door shaft. The door and the fuselage structure are locked by multiple latches. The support is installed on the door structure and rotates around the shaft with the door, while the latch is fixedly installed on the fuselage end frame. At the theoretical closed position of the door, the latch hole on the support should be coaxial with the latch shaft, but due to the influence of factors such as the stiffness of the door, manufacturing, assembly errors, etc., there will be a certain deviation between the latch hole on the support and the latch shaft. Moreover, due to the uncertainty of the direction and size of the gust load and the difference in the stiffness of each position of the door, the direction and size of the deviation of each latch are also uncertain, thereby affecting the locking of the latches.

[0003] At present, most aircrafts use a method of setting a guide structure with a large taper on the latch part and pressing a copper bushing into the latch hole on the support part. However, this method cannot make the latch coaxial with the latch hole on the support, but only forcibly inserted. The misalignment causes the bushing and the latch to have a large friction during the insertion of a single locking point, the bushing is severely worn, and the latch is difficult to insert. Multiple locking points simultaneously locking may even tear the structure, which has a great impact on the door structure.

[0004] Therefore, it is desirable to have a technical solution to overcome or at least alleviate at least one of the above-mentioned deficiencies of the prior art. SUMMARY

[0005] The purpose of the present application is to provide a self-adaptive latch support structure to solve at least one problem existing in the prior art.

[0006] The technical solution of the present application is:

[0007] A self-adaptive latch support structure, comprising:

[0008] A movable support is fixedly installed on the door, a first joint is arranged on the movable support, an installation hole is formed in the first joint, and a joint bearing is installed in the installation hole;

[0009] A limiting stopper is fixedly connected with the movable support, the limiting stopper has a first limiting part and a second limiting part, the first limiting part limits the deflection angle of the inner ring of the joint bearing, and the second limiting part limits the outer ring of the joint bearing;

[0010] A fixed support is fixedly installed on the machine body, a second joint is arranged on the fixed support, a latch hole is arranged on the second joint, and the latch hole is aligned with the joint bearing hole when the hatch is closed.

[0011] A latch is arranged through the joint bearing hole and the latch hole to complete the locking.

[0012] In at least one embodiment of the present application, the movable support is a 7050 aluminum alloy machined part.

[0013] In at least one embodiment of the present application, the first joint is a single ear joint.

[0014] In at least one embodiment of the present application, the joint bearing is a standard part.

[0015] In at least one embodiment of the present application, the limiting stopper is triangular, and two limiting stoppers are symmetrically fixedly installed on both sides of the first joint by bolts.

[0016] In at least one embodiment of the present application, the first limiting portion has a first limiting profile close to the inner ring of the joint bearing, the second limiting portion has a second limiting profile close to the outer ring of the joint bearing, the thickness of the first limiting portion is less than the thickness of the second limiting portion, and the thickness difference between the two limiting portions is designed to form a deflection space of the inner ring of the joint bearing between the first limiting profile and the second limiting profile.

[0017] In at least one embodiment of the present application, the deflection space of the inner ring of the joint bearing is designed according to the maximum deviation of each position.

[0018] In at least one embodiment of the present application, the limiting stopper is a stainless steel machined part.

[0019] In at least one embodiment of the present application, the fixed support is a 7050 aluminum alloy machined part.

[0020] In at least one embodiment of the present application, the second joint is a double ear joint.

[0021] In at least one embodiment of the present application, the latch is a stainless steel machined part.

[0022] In at least one embodiment of the present application, a tapered guide structure is designed at the front end of the latch.

[0023] The present application has at least the following beneficial technical effects:

[0024] The adaptive latch support structure of the present application is installed with a knuckle bearing on the movable support, so that the inner ring of the knuckle bearing will be coaxial with the latch under the action of the guide structure at the front end of the latch during the insertion of the latch, thereby smoothly locking; limit stoppers are installed on both sides of the movable support, which can prevent the knuckle bearing from falling out when the latch is inserted, and can also control the adaptive angle of the knuckle bearing to prevent the knuckle bearing from being deflected too much and blocking the latch hole. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the retraction of the latch of the adaptive latch support structure of an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of the extension of the latch of the adaptive latch support structure of an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of the limit stopper of an embodiment of the present application;

[0028] Figure 4 is a schematic diagram of the latch of an embodiment of the present application.

[0029] Among them:

[0030] 1-movable support; 2-limit stopper; 3-fixed support; 4-latch; 5-knuckle bearing. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiments of the present application will be described in more detail below in combination with the drawings of the embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some of the embodiments of the present application, not all embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application.

[0033] The following is in conjunction with the appendix Figures 1-2 This application will be described in further detail.

[0034] This application provides an adaptive bolt lock support structure, including: a movable support 1, a limiting stop 2, a fixed support 3, and a bolt 4.

[0035] Specifically, such as Figures 1-2 As shown, the movable support 1 is fixedly installed on the hatch. The movable support 1 is provided with a first joint, and the first joint has an installation hole in which a spherical bearing 5 is installed.

[0036] In a preferred embodiment of this application, the first connector is a single-ear connector. The spherical plain bearing 5 is a standard part, and the spherical plain bearing 5 includes an outer ring, an inner ring, and a bearing bore. The inner ring can not only rotate around the axis, but also deflect relative to the outer ring.

[0037] The limiting stop 2 is fixedly connected to the movable support 1. The limiting stop 2 has a first limiting part and a second limiting part. The first limiting part limits the deflection angle of the inner ring of the spherical bearing 5, and the second limiting part limits the outer ring of the spherical bearing 5. The fixed support 3 is fixedly installed on the fuselage. The fixed support 3 is provided with a second connector. The second connector has a pin hole. When the hatch is closed, the pin hole is aligned with the bearing hole of the spherical bearing 5. The pin 4 passes through the bearing hole of the spherical bearing 5 and the pin hole to complete the locking.

[0038] In a preferred embodiment of this application, the limiting stop 2 is triangular, and the two limiting stops 2 are symmetrically fixed on both sides of the first joint by bolt groups. Figure 3 As shown, the first limiting part of the limiting stop 2 has a first limiting surface a near the inner ring of the spherical bearing 5, and the second limiting part has a second limiting surface b near the outer ring of the spherical bearing 5. The thickness of the first limiting part is less than the thickness of the second limiting part. Through the thickness difference design of the two limiting parts, a deflection space for the inner ring of the spherical bearing 5 is formed between the first limiting surface a and the second limiting surface b.

[0039] In this embodiment, the second connector on the fixed support 3 is a double-ear connector. Advantageously, as... Figure 4As shown, the front end of the latch 4 is designed with a tapered guide structure.

[0040] The adaptive latch support structure of the application, the movable support 1 is a 7050 aluminum alloy machined part, the limiting stopper 2 is a stainless steel machined part, the fixed support 3 is a 7050 aluminum alloy machined part, the latch 4 is a stainless steel machined part, and the joint bearing 5 is a standard part. The processing technology is mature, the processing reliability is high, the cost is controllable, and the part size and tolerance are easy to guarantee.

[0041] The adaptive latch support structure of the application, the movable support 1 is fixedly installed on the cabin door structure and moves with the opening / closing of the cabin door, the limiting stopper 2 is fixedly connected with the movable support 1 through two bolt groups, on the one hand, the first limiting surface a of the first limiting part limits the deflection angle of the inner ring of the joint bearing 5 to prevent the inner ring from being excessively deflected, and on the other hand, the second limiting surface b of the second limiting part limits the outer ring of the joint bearing 5 to prevent the joint bearing 5 from sliding out. The latch 4 is installed on the fuselage mechanism side through the fixed support 3, the latch 4 extends out after the cabin door is closed, passes through the bearing hole of the joint bearing installed on the movable support 1, and is locked. When the cabin door needs to be opened, the latch 4 is retracted, and the cabin door is opened.

[0042] The first limiting surface a of the first limiting part of the limiting stopper 2 needs to be designed according to the deflection angle of the inner ring of the joint bearing 5, and the deflection angle of the inner ring of the joint bearing 5 needs to be designed according to the maximum deviation of each position. The front end of the latch 4 is designed with a tapered guide structure, which can be inserted when the inner ring of the joint bearing 5 reaches the maximum deflection angle. After the cabin door is closed, the latch 4 extends out, and under the action of the tapered guide structure at the front end of the latch 4, the bearing hole of the joint bearing 5 is coaxial with the latch 4, the latch 4 passes through the bearing hole of the joint bearing on the movable support 1, and is locked.

[0043] The adaptive latch support structure of the application has the following beneficial effects:

[0044] 1. By installing the joint bearing 5 on the movable support 1, the inner ring of the joint bearing 5 is coaxial with the latch 4 under the action of the guide structure at the front end of the latch 4 during the insertion of the latch 4 into the movable support 1, so that the latch is successfully locked.

[0045] 2. The limiting stopper 2 is installed on both sides of the movable support 1, which can prevent the joint bearing 5 from falling out when the latch 4 is inserted, and can control the adaptive angle of the joint bearing 5 to prevent the joint bearing 5 from being excessively deflected and blocking the latch hole.

[0046] The self-adapting latch support structure of the application has been analyzed in detail, and it is shown that it fully meets the functional requirements, has less parts, strong adaptability, good economy and assembly performance, and can be applied to the latch support of the cabin door of civil and military aircraft.

[0047] The above merely provides specific implementation manners of the application, but the protection scope of the application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, which shall be covered in the protection scope of the application. Therefore, the protection scope of the application shall be subject to the protection scope of the claims.

Claims

1. An adaptive pin lock support structure, characterized in that, include: Movable support (1), the movable support (1) is fixedly installed on the hatch, the movable support (1) is provided with a first joint, the first joint is provided with an installation hole, and a spherical bearing (5) is installed in the installation hole; The limiting stop (2) is fixedly connected to the movable support (1). The limiting stop (2) has a first limiting part and a second limiting part. The first limiting part limits the deflection angle of the inner ring of the spherical bearing (5), and the second limiting part limits the outer ring of the spherical bearing (5). Fixed support (3), the fixed support (3) is fixedly installed on the fuselage, the fixed support (3) is provided with a second connector, the second connector is provided with a pin hole, when the hatch is closed, the pin hole is aligned with the bearing hole of the spherical bearing (5); The pin (4) passes through the bearing hole of the spherical bearing (5) and the pin hole to complete the locking.

2. The adaptive pin lock support structure according to claim 1, characterized in that, The movable support (1) is a 7050 aluminum alloy machined part.

3. The adaptive pin lock support structure according to claim 2, characterized in that, The first connector is a single-ear connector.

4. The adaptive pin lock support structure according to claim 3, characterized in that, The spherical bearing (5) is a standard part.

5. The adaptive pin lock support structure according to claim 4, characterized in that, The limiting stop (2) is triangular, and the two limiting stops (2) are symmetrically fixed on both sides of the first joint by bolt groups.

6. The adaptive pin lock support structure according to claim 5, characterized in that, The first limiting part has a first limiting surface near the inner ring of the spherical bearing (5), and the second limiting part has a second limiting surface near the outer ring of the spherical bearing (5). The thickness of the first limiting part is less than the thickness of the second limiting part. Through the thickness difference design of the two limiting parts, a deflection space for the inner ring of the spherical bearing (5) is formed between the first limiting surface and the second limiting surface.

7. The adaptive pin lock support structure according to claim 6, characterized in that, The deflection space of the inner ring of the spherical bearing (5) is designed according to the maximum deviation at each position.

8. The adaptive pin lock support structure according to claim 7, characterized in that, The limiting stop (2) is a stainless steel machined part.

9. The adaptive pin lock support structure according to claim 8, characterized in that, The fixed support (3) is a 7050 aluminum alloy machined part.

10. The adaptive pin lock support structure according to claim 9, characterized in that, The second connector is a double-ear connector.

11. The adaptive pin lock support structure according to claim 10, characterized in that, The pin (4) is a stainless steel machined part.

12. The adaptive pin lock support structure according to claim 11, characterized in that, The front end of the pin (4) is designed with a tapered guide structure.

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