An adjustable truss-type multi-strut landing gear

Abstract

The application provides an adjustable truss type multi-strut landing gear, belonging to the field of aircraft landing gears, and comprising a landing gear strut, a lower rocker arm, a rotating shaft, a side support rod, a support, a buffer, an upper rocker arm and a front support rod, wherein the landing gear strut is pivotally connected with the lower rocker arm through the rotating shaft, a wheel is installed on the lower rocker arm, the side support rod is a structure with adjustable length, one end of the side support rod is hingedly connected with the rotating shaft, and the other end of the side support rod is connected to a body structure, the support is installed on the rotating shaft pivotally connecting the landing gear strut and the lower rocker arm, and is used for supporting the landing gear strut of the rear group of landing gears, one end of the buffer is hingedly connected with the lower rocker arm, and the other end of the buffer is hingedly connected with the upper rocker arm, the upper rocker arm is pivotally connected with the landing gear strut, the buffer is driven to move by driving the upper rocker arm, and then the lower rocker arm can rotate relative to the rotating shaft, so that the landing gear can be retracted and extended.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft landing gear, and in particular relates to an adjustable truss-type multi-strut landing gear. Background Art

[0002] Nowadays, small aircraft generally use strut-type landing gear or rocker-type landing gear. When this type of landing gear is retracted or extended, all major components of the landing gear are involved in the retraction and extension process, so a large retraction and extension actuator is required. In addition, this type of landing gear has complex force transmission and is heavy. Summary of the Invention

[0003] The object of the present application is to provide an adjustable truss-type multi-strut landing gear to solve or alleviate at least one problem in the background technology.

[0004] The technical solution of the present application is: an adjustable truss-type multi-strut landing gear, comprising: a landing gear strut, a lower rocker arm, a rotating shaft, a side support rod, a bracket, a buffer and an upper rocker arm, wherein the landing gear strut and the lower rocker arm are pivotally connected by a rotating shaft, and a wheel is installed on the lower rocker arm. The side support rod is a structure with adjustable length, one end of which is hinged to the rotating shaft and the other end is connected to the body structure. The bracket is installed on the rotating shaft pivoting the landing gear strut and the lower rocker arm, and is used to support the landing gear strut of the rear group of landing gear. One end of the buffer is hinged to the lower rocker arm and the other end is hinged to the upper rocker arm. The upper rocker arm is pivoted to the landing gear strut, and the buffer is driven to move by driving the upper rocker arm, so that the lower rocker arm can be rotated relative to the rotating shaft, thereby realizing the retraction and extension of the landing gear.

[0005] Preferably, the side support rod includes a rod body, an adjusting joint, and a locking nut. The inner and outer surfaces of the rod body and the adjusting joint are respectively provided with matching internal threads and external threads. The end of the rod body is connected to the rotating shaft, and the adjusting joint is connected to the body structure. The length of the side support rod is adjusted by rotating the rod body or the adjusting joint. The locking nut is installed on the adjusting joint and is used to apply a locking force to the rod body when the rod body and the adjusting joint are adjusted to a predetermined length.

[0006] Preferably, the front support rod and the side support rod have the same structure.

[0007] Preferably, a rotation-stopping washer is further included. A groove is provided on the adjusting joint or the rod body. The rotation-stopping washer is provided in the groove to limit the locking nut from further rotation after the rod body and the adjusting joint are adjusted to appropriate positions.

[0008] Preferably, a bearing is provided on the adjusting joint.

[0009] Preferably, the bearing is a spherical plain bearing.

[0010] Preferably, an opening is provided on the body of the bracket, the buffer is placed in the opening and moves in the opening, and a first ear piece located in the middle and a second ear piece located in the corner are provided on the upper side of the opening of the bracket, the first ear piece is used to connect to the landing gear strut of the next set of landing gear, and the second ear piece is used to connect to the body structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions provided by this application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application.

[0012] Figure 1 This is a schematic diagram of the adjustable truss-type multi-strut landing gear of the present application.

[0013] Figure 2 Schematic diagram of the side support rod in this application. DETAILED DESCRIPTION

[0014] 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.

[0015] like Figure 1 As shown, the present application provides an adjustable truss-type multi-strut landing gear including: a landing gear strut 1, a lower rocker arm 2, a rotating shaft 3, a side support rod 4, a bracket 5, a buffer 6, an upper rocker arm 7 and a front support rod 8.

[0016] The landing gear strut 1 is pivotally connected to the lower rocker arm 2 via a rotating shaft 3, and a wheel is mounted on the lower rocker arm 2. A front strut 8 is hinged to the front end of the landing gear strut 1 and is a length-adjustable structure.

[0017] The side support rod 4 is also a length-adjustable structure, one end of which is hinged to the rotating shaft 3 and the other end is connected to the body structure.

[0018] The bracket 5 is mounted on the rotating shaft 3 and is used to support the landing gear struts (not shown) of the rear landing gear.

[0019] One end of the buffer 6 is hinged to the lower rocker arm 2, and the other end is hinged to the upper rocker arm 7. The upper rocker arm 7 is pivoted to the landing gear strut 1. By driving the upper rocker arm 7, the lower rocker arm 2 can be rotated relative to the rotating shaft 3, thereby retracting and lowering the wheel.

[0020] The front support rod 8 has the same structure as the side support rod 4 , and this application takes the side support rod 4 as an example for description.

[0021] like Figure 2As shown, the side support rod 4 comprises a rod body 41, an adjustment joint 42, a locking nut 43, and a stop washer 44. The inner and outer surfaces of the rod body 41 and the adjustment joint 42 are provided with matching internal and external threads, respectively. The end of the rod body 41 is connected to the rotating shaft 3, and the adjustment joint 42 is connected to the main structure. The length of the side support rod 4 is adjusted by rotating the rod body 41 or the adjustment joint 42. The locking nut 43 is mounted on the adjustment joint 42. By rotating the locking nut 43, a locking force is applied to the rod body 41 when the rod body 41 and the adjustment joint 42 are adjusted to a predetermined length. The adjustment joint 42 or the rod body 41 may be provided with a groove, and the stop washer 44 is disposed within the groove. When the rod body 41 and the adjustment joint 42 are adjusted to the appropriate position, the stop washer 44 disposed within the groove restricts further rotation of the locking nut 43.

[0022] It should be noted that the front strut 8 and the side strut 4 have the same structure but may have different lengths and loads. The adjustable truss-type multi-strut landing gear adjusts the lateral and vertical positions of the landing gear through the side strut 4, and adjusts the directional position of the landing gear through the front strut 8, so that each set of landing gear can achieve independent position adjustment in three directions.

[0023] In some embodiments of the present application, a bearing 45 is provided on the adjustment joint 42 connected to the body structure, for adjusting the swing angle of the side support rod 4. Furthermore, the bearing 45 is a spherical bearing.

[0024] In the present application, an opening is provided on the body of the bracket 5, and the buffer 6 is placed in the opening and can move in the opening. The upper side of the opening of the bracket 5 is provided with a first ear piece 51 located in the middle and a second ear piece 52 located in the corner. The first ear piece 51 is used to connect to the landing gear strut of the next set of landing gear, and the second ear piece is used to connect to the body structure.

[0025] The adjustable truss-type multi-strut landing gear of this application utilizes a fixed truss support. The horizontal and lateral support of the wheel axles are adjusted via length-adjustable side struts 4. A retractable actuator (not shown) provides force acting on an upper rocker arm 7, which drives a buffer 6, which in turn rotates a lower rocker arm 2 about a rotation axis 3, thereby fulfilling the retraction and extension function of the landing gear. By supporting the landing gear struts of the subsequent landing gear group on the upper side of a bracket 5, multiple landing gear groups can be connected in series, while maintaining relative independence (independent load-bearing, independent retraction, and independent adjustment of wheel axle leveling).

[0026] The adjustable truss-type multi-strut landing gear provided in the present application bears large lateral loads through the side support rods that serve as lateral supports, while adjusting the level of the wheel axle of the landing gear; secondly, the three-point joint bearings in the same plane along the heading can release the heading load, so that the bracket 5 only bears lateral and vertical loads, so that each set of truss-type landing gear can bear loads independently, and the number of truss-type landing gears can be expanded according to the size of the aircraft or the take-off weight requirements.

[0027] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An adjustable truss-type multi-strut landing gear, characterized in that: include: A landing gear strut, a lower rocker arm, a rotating shaft, a side support rod, a front support rod, a bracket, a buffer, an upper rocker arm and a rotation-stopping pad, wherein the landing gear strut and the lower rocker arm are pivotally connected by a rotating shaft, a wheel is installed on the lower rocker arm, the side support rod is a length-adjustable structure, one end of which is hinged to the rotating shaft and the other end is connected to the body structure, the bracket is installed on the rotating shaft pivotally connecting the landing gear strut and the lower rocker arm, and is used to support the landing gear strut of the rear group of landing gears, the buffer is hinged to the lower rocker arm at one end and hinged to the upper rocker arm at the other end, the upper rocker arm is pivotally connected to the landing gear strut, and the buffer is driven to move by driving the upper rocker arm, thereby enabling the lower rocker arm to rotate relative to the rotating shaft, thereby realizing the retraction and extension of the landing gear; The side support rod includes a rod body, an adjustment joint, and a locking nut. The inner and outer surfaces of the rod body and the adjustment joint are respectively provided with matching internal and external threads. The end of the rod body is connected to the rotating shaft, and the adjustment joint is connected to the body structure. The length of the side support rod is adjusted by rotating the rod body or the adjustment joint. The locking nut is installed on the adjustment joint and is used to apply a locking force to the rod body when the rod body and the adjustment joint are adjusted to a predetermined length. The front support rod has the same structure as the side support rod; A rotation-stopping pad is provided with a groove on the adjusting joint or the rod body, and the rotation-stopping pad is arranged in the groove to limit the locking nut from continuing to rotate after the rod body and the adjusting joint are adjusted to an appropriate position.

2. The adjustable truss-type multi-strut landing gear according to claim 1, characterized in that: A bearing is provided on the adjusting joint.

3. The adjustable truss-type multi-strut landing gear according to claim 2, characterized in that: The bearing is a spherical plain bearing.

4. The adjustable truss-type multi-strut landing gear according to claim 1, characterized in that: An opening is provided on the main body of the bracket, and the buffer is placed in the opening and moves in the opening. A first ear piece located in the middle and a second ear piece located in the corner are provided on the upper side of the opening of the bracket. The first ear piece is used to connect to the landing gear strut of the next set of landing gear, and the second ear piece is used to connect to the body structure.

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