Door-shaped support for large truss type undercarriage

Abstract

The invention provides a door-shaped support for a large truss type landing gear, and belongs to the technical field of aircraft landing gear, the door-shaped support comprises a door-shaped support body, the lower side of the door-shaped support body is provided with an opening, and the opening is used for forming a motion space of a buffer installed on a landing gear supporting column; wherein a first connecting lug is arranged on the upper side of an opening of the door-shaped support, a rear set of undercarriage supporting columns are supported through the first connecting lug, a second connecting lug is arranged at the corner of the opening of the door-shaped support, connection between the door-shaped support and an airframe structure is achieved through the second connecting lug, and wide double lugs are formed on the two sides of the opening of the door-shaped support. The wide double-lug piece is installed at the hinge point position of the undercarriage supporting column and the rocker arm and is connected with the undercarriage supporting column and the rocker arm through the same connecting shaft.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft landing gear, and in particular relates to a door-shaped bracket for a large truss landing gear. Background Art

[0002] In large truss landing gear structures, portal brackets are usually required for support. The portal bracket must meet both the load-bearing requirements and the structural layout requirements. Therefore, the quality of the portal bracket design directly affects the function of the truss landing gear. Since the design space of the truss landing gear has always been relatively cramped, the design of the portal bracket is restricted by many factors, which increases the design difficulty. Summary of the invention

[0003] The object of the present application is to provide a portal support for a large truss landing gear to solve or alleviate at least one problem in the background technology.

[0004] The technical solution of the present application is: a portal bracket for a large truss landing gear, comprising a portal bracket body, the lower side of the portal bracket body is provided with an opening, the opening is used to form a movement space for a buffer installed on a landing gear strut;

[0005] Among them, a first connecting ear piece is provided on the upper side of the opening of the gate-shaped bracket, and a rear group of landing gear struts are supported by the first connecting ear piece. A second connecting ear piece is provided at the opening corner of the gate-shaped bracket, and the connection between the gate-shaped bracket and the body structure is realized by the second connecting ear piece. Wide double ear pieces are formed on both sides of the opening of the gate-shaped bracket, and the wide double ear pieces are installed at the hinge position of the landing gear strut and the rocker arm through the wide double ear pieces and are connected through the same connecting shaft.

[0006] Preferably, the bottom of the opening is an arc structure.

[0007] Preferably, the gate-shaped bracket body is formed in one piece by forging.

[0008] Preferably, a plurality of ribs are provided on the gate-shaped bracket body.

[0009] Preferably, the gate-shaped bracket is made of a material selected from the group consisting of aluminum alloy and titanium alloy.

[0010] Preferably, the first connecting ear piece and the second connecting ear piece are equipped with bearings.

[0011] Preferably, the bearing is a spherical plain bearing.

[0012] Preferably, bushings are installed at the wide double-ear pieces at the lower part of the gate-shaped bracket body.

[0013] Preferably, the bushing is a metal wear-resistant bushing or a non-metal wear-resistant silicon carbide bushing or a non-metal wear-resistant ceramic bushing.

[0014] The portal bracket for large truss landing gear provided in the present application is equipped with joint bearings in the three main connection points connected to the body structure, which can well adjust the clearance problem accumulated by the assembly tolerance; secondly, the three-point joint bearings in the same plane along the heading can release the heading load, so that the portal bracket only bears lateral and vertical loads; thirdly, the portal bracket can prevent structural instability caused by too large a swing angle of the joint bearing; finally, the portal bracket plays a connecting role (the upper part of the portal bracket is connected to the rear group of landing gear struts, and the lower part is connected to the landing gear struts and rocker arms). This connection method allows each group of truss landing gear to be independently loaded, that is, this type of landing gear can expand the number of truss landing gears according to the size of the aircraft or the take-off weight requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution provided by the present application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application.

[0016] Figure 1 This is a schematic diagram of a portal bracket for a large truss landing gear according to the present application.

[0017] Figure 2 This is a schematic diagram of the truss landing gear of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0019] The present application provides a door-shaped bracket for a large truss landing gear, which can meet the load-bearing requirements while ensuring a simple structure and has great practical application value.

[0020] like Figure 1 and Figure 2 As shown, the portal support for a large truss landing gear provided by the present application comprises a portal support body 11 , and an opening 16 is provided at the lower side of the portal support body 11 , and the opening 16 is used to form a movement space for a buffer 60 installed on a landing gear strut 20 .

[0021] A first connecting ear piece 12 is provided on the upper side of the opening 16 of the gate-shaped bracket 10, and a rear group of landing gear struts 50 are supported by the first connecting ear piece 12. A second connecting ear piece 13 is provided at the corner of the opening 16 of the gate-shaped bracket 10, and the gate-shaped bracket 10 can be connected to the body structure by the second connecting ear piece 13.

[0022] Wide double-ear pieces 14 are formed on both sides of the opening 16 of the gate-shaped bracket 10 , and the gate-shaped bracket 10 is installed at the hinge point of the landing gear strut 20 and the rocker arm 30 through the wide double-ear pieces 14 , and is connected through the same connecting shaft 41 .

[0023] In some embodiments of the present application, the bottom of the opening 16 is configured to be an arc structure to reduce the structural stress of the gate-shaped bracket.

[0024] In some embodiments of the present application, the gate-shaped bracket body 11 can be integrally formed by forging to improve the structural strength. Preferably, a plurality of ribs are provided on the gate-shaped bracket body 11 to further improve its structural strength.

[0025] In the present application, the first connecting lug 12 and the second connecting lug 13 are equipped with bearings for adjusting the swing angles of the struts 50 and the gate-shaped bracket 1 on the rear landing gear. Further, the bearings are spherical bearings.

[0026] In the present application, a bushing is installed at the wide double-ear piece 14 at the lower part of the gantry support body 11 to prevent wear between the gantry support 10 and the landing gear strut 20. Further, the bushing can be a metal wear-resistant bushing, a non-metallic wear-resistant silicon carbide bushing, or a non-metallic wear-resistant ceramic bushing.

[0027] In some embodiments of the present application, the gate-shaped bracket 10 can be made of a material selected from the group consisting of aluminum alloy and titanium alloy.

[0028] In the present application, the wide double ear pieces 14 of the gate-shaped bracket body 11 are provided with lateral ear pieces 15 extending outward.

[0029] like Figure 2 As shown, the gantry bracket 10 of the present application is installed at the hinge position of the landing gear strut 20 and the rocker arm 30 through a wide double ear piece 14, and the three are connected together through a connecting shaft 41, and the connecting shaft 41 is connected to the body structure through a side support rod 40, wherein a joint bearing is installed in the ear piece connecting the side support rod 40 and the body structure. The first connecting ear piece 12 of the gantry bracket 10 is inserted into the rear group of landing gear upper struts 50, and the second connecting ear piece 13 of the gantry bracket 10 is connected to the body structure, thereby achieving the support of the landing gear strut and the rocker arm.

[0030] The portal bracket for large truss landing gear provided in the present application is equipped with joint bearings in the three main connection points connected to the body structure, which can well adjust the clearance problem accumulated by the assembly tolerance; secondly, the three-point joint bearings in the same plane along the heading can release the heading load, so that the portal bracket only bears lateral and vertical loads; thirdly, the portal bracket can prevent structural instability caused by too large a swing angle of the joint bearing; finally, the portal bracket plays a connecting role (the upper part of the portal bracket is connected to the rear group of landing gear struts, and the lower part is connected to the landing gear struts and rocker arms). This connection method allows each group of truss landing gear to be independently loaded, that is, this type of landing gear can expand the number of truss landing gears according to the size of the aircraft or the take-off weight requirements.

[0031] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A portal bracket for a large truss landing gear, characterized in that: It comprises a gate-shaped bracket body, wherein the lower side of the gate-shaped bracket body is provided with an opening, and the opening is used to form a movement space of a buffer installed on the landing gear strut; Among them, a first connecting ear piece is provided on the upper side of the opening of the gate-shaped bracket, and a rear group of landing gear struts are supported by the first connecting ear piece. A second connecting ear piece is provided at the opening corner of the gate-shaped bracket, and the connection between the gate-shaped bracket and the body structure is realized by the second connecting ear piece. Wide double ear pieces are formed on both sides of the opening of the gate-shaped bracket, and the wide double ear pieces are installed at the hinge position of the landing gear strut and the rocker arm through the wide double ear pieces and are connected through the same connecting shaft.

2. The portal bracket for a large truss landing gear according to claim 1, characterized in that: The bottom of the opening is an arc structure.

3. The portal bracket for a large truss landing gear according to claim 1, characterized in that: The gate-shaped bracket body is integrally formed by forging.

4. The portal bracket for a large truss landing gear according to claim 3, characterized in that: The gate-shaped bracket body is provided with a plurality of ribs.

5. The portal bracket for a large truss landing gear according to claim 3 or 4, characterized in that: The gate-shaped bracket is made of a material selected from the group consisting of aluminum alloy and titanium alloy.

6. The portal bracket for a large truss landing gear according to claim 1, characterized in that: The first connecting ear piece and the second connecting ear piece are equipped with bearings.

7. The portal bracket for a large truss landing gear according to claim 6, characterized in that: The bearing is a spherical plain bearing.

8. The portal bracket for a large truss landing gear according to claim 1, characterized in that: Bushings are installed at the wide double-ear pieces at the lower part of the gate-shaped bracket body.

9. The portal bracket for a large truss landing gear according to claim 8, characterized in that: The bushing is a metal wear-resistant bushing, a non-metal wear-resistant silicon carbide bushing, or a non-metal wear-resistant ceramic bushing.

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