CN218907597U

CN218907597U - Passive retraction mechanism of foldable retractable landing gear

Info

Publication number: CN218907597U
Application number: CN202223481397.XU
Authority: CN
Inventors: 钟小宏; 裴华平; 黄志军; 曾祥财; 鲁胜; 邹衍; 赵振贵; 李亮亮; 朱裕谱; 李乐伟
Original assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Current assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-04-25
Anticipated expiration: 2032-12-26

Abstract

The utility model provides a passive type retraction mechanism of collapsible shrink undercarriage, includes and receive and releases actuator cylinder, pillar, linking arm, undercarriage pivot, buffer, driven arm and wheel tire, wherein, the linking arm is fixed in the undercarriage pivot, the tie point of buffer one end and linking arm is located under the undercarriage pivot, the buffer other end is installed on the driven arm, driven arm one end is connected with pillar one end, the wheel tire is installed to the driven arm other end, the pillar other end nestification is in the undercarriage pivot and can rotate around the landing frame pivot, receive and release actuator cylinder one end is installed on the pillar. According to the utility model, the buffer is used as the fixed-length rod, the retractable actuating cylinder is retracted along the axial direction to drive the support column to rotate around the rotating shaft of the lifting frame to retract and further to drag the driven arm, so that the included angle between the driven arm and the support column is gradually reduced, the landing gear is driven to produce folding and retracting actions, the retraction amount is large, the landing gear storage space is effectively saved, and the structure is reasonable and reliable.

Description

Passive retraction mechanism of foldable retractable landing gear

Technical Field

The utility model relates to the technical field of aircraft structures, in particular to a passive retraction mechanism of a foldable retractable landing gear.

Background

With the increasing prominence of aircraft landing gear in modern aircraft designs, designers are faced with new challenges, requiring the lightest weight, compactest construction, and designing the safest and reliable landing gear. When the aircraft flies, the landing gear is required to be stored in the fuselage or the wings in order to reduce the resistance, and because of the overall arrangement of the aircraft, part of the landing gear has the problem of shortage of storage space, and the thickness and movement clearance of the landing gear storage space provided by the aircraft are removed, so that the landing gear can not be stored under the condition of full extension (the buffer is in a non-compression state) by adopting the traditional prop type or rocker type landing gear; therefore, a passive retraction mechanism of the foldable retractable landing gear needs to be designed, so that the folding retraction of the landing gear is realized when the landing gear is retracted, and the storage requirement of the landing gear is met.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a passive retraction mechanism of a foldable retractable landing gear, so as to solve the problems in the background art.

The technical problems solved by the utility model are realized by adopting the following technical scheme:

the utility model provides a passive type retraction mechanism of collapsible shrink undercarriage, includes and receive and releases actuator cylinder, pillar, linking arm, undercarriage pivot, buffer, driven arm and wheel tire, wherein, the linking arm is fixed in the undercarriage pivot, the tie point of buffer one end and linking arm is located under the undercarriage pivot, the buffer other end is installed on the driven arm, driven arm one end is connected with pillar one end, the wheel tire is installed to the driven arm other end, the pillar other end nestification is in the undercarriage pivot and can rotate around the landing frame pivot, receive and release actuator cylinder one end is installed on the pillar.

In the utility model, the two ends of the buffer are respectively provided with a radial joint bearing.

In the utility model, the central axis of the buffer is intersected with the rotating shaft of the landing gear.

In the utility model, the fixed seat is arranged on the driven arm, the fixed seat is symmetrically provided with the mounting through holes, and the buffer extends into the fixed seat and is fixedly mounted through bolts.

In the utility model, the support is provided with the mounting seat, the mounting seat is symmetrically provided with the pin holes, and the mounting pins are inserted into the pin holes and used for mounting the retractable actuating cylinders.

In the utility model, the connecting arm is arranged in an arc-shaped structure at the connecting end with the buffer, and is provided with a mounting hole, and the connecting arm is fixed with the buffer through a fixing pin.

In the utility model, when the landing gear is retracted, the retraction actuating cylinder retracts axially to drive the support column to rotate around the landing gear rotating shaft to retract, the buffer rotates around the connecting arm connecting point to retract, the buffer is used as the fixed-length rod to further pull the driven arm, so that the included angle between the driven arm and the support column is gradually reduced, and the landing gear is driven to produce folding and shrinking actions until the landing gear is folded and shrunk.

The beneficial effects are that: according to the utility model, the buffer is used as the fixed-length rod, the retractable actuating cylinder is retracted along the axial direction to drive the support column to rotate around the rotating shaft of the lifting frame to retract and further to drag the driven arm, so that the included angle between the driven arm and the support column is gradually reduced, the landing gear is driven to produce folding and retracting actions, the retraction amount is large, the landing gear storage space is effectively saved, and the structure is reasonable and reliable.

Drawings

Fig. 1 is a schematic structural view of a preferred embodiment of the present utility model.

Fig. 2 is a front view of a preferred embodiment of the present utility model.

FIG. 3 isbase:Sub>A cross-sectional view taken at A-A in FIG. 2.

Fig. 4 is a folded collapsed top view of a preferred embodiment of the utility model.

Fig. 5 is a folded collapsed front view of a preferred embodiment of the present utility model.

Detailed Description

The utility model is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the utility model easy to understand.

Referring to a passive retraction mechanism of collapsible undercarriage of fig. 1~5, including retraction actuator 1, pillar 2, linking arm 3, undercarriage pivot 4, buffer 5, driven arm 6, stop bolt 7 and wheel tire, wherein, linking arm 3 passes through stop bolt 7 to be fixed on undercarriage pivot 4, radial spherical plain bearing is installed respectively at buffer 5 both ends, and the tie point of buffer 5 one end and linking arm 3 is located undercarriage pivot 4 under, and the buffer 5 other end is installed on driven arm 6, driven arm 6 one end is connected with pillar 2 one end, driven arm 6 other end installs the wheel tire, pillar 2 other end nestification is in undercarriage pivot 4 and can wind the rotation of landing frame pivot 4, retraction actuator 1 one end is installed on pillar 2.

In this embodiment, the central axis of the buffer 5 (i.e. the line connecting the centers of the two radial spherical bearings) intersects the landing gear shaft 4.

In this embodiment, the fixed seat is provided on the driven arm 6, the fixed seat is symmetrically provided with mounting through holes, and the buffer 5 extends into the fixed seat and is fixedly mounted by bolts.

In this embodiment, the support post 2 is provided with a mounting seat, and the mounting seat is symmetrically provided with a pin hole, and a mounting pin is inserted into the pin hole for mounting the retractable actuator cylinder 1.

In this embodiment, the connecting arm 3 is provided with an arc structure at the connecting end with the buffer 5, and a mounting hole is provided on the arc structure, and the connecting arm 3 and the buffer 5 are fixed by a fixing pin.

In this embodiment, when the landing gear is retracted, the retraction actuator 1 retracts axially, drives the strut 2 to rotate around the landing gear rotating shaft 4 to retract, and the buffer 5 rotates around the connection point of the connecting arm 3 to retract, so that the buffer 5 is used as a fixed-length rod, and the driven arm 6 is pulled, so that the included angle between the driven arm 6 and the strut 2 is gradually reduced, and the landing gear is driven to generate folding and shrinking actions until the landing gear is folded and shrunk.

Claims

1. The utility model provides a passive type retraction mechanism of collapsible undercarriage, includes and receive and releases actuator cylinder, pillar, linking arm, undercarriage pivot, buffer, driven arm and wheel tire, its characterized in that, the linking arm is fixed in the undercarriage pivot, the tie point of buffer one end and linking arm is located the undercarriage pivot under, the buffer other end is installed on the driven arm, driven arm one end is connected with pillar one end, the wheel tire is installed to the driven arm other end, the pillar other end nestification is in the undercarriage pivot and can rotate around the landing frame pivot, receive and release actuator cylinder one end is installed on the pillar.

2. A passive retraction mechanism for a collapsible landing gear according to claim 1 wherein said damper is provided with radial spherical bearings at each end thereof.

3. A passive retraction mechanism for a collapsible landing gear according to claim 1 wherein the passive arm is provided with a fixed seat, and the fixed seat is symmetrically provided with mounting holes.

4. A passive retraction mechanism for a collapsible landing gear according to claim 1 wherein the post is provided with mounting seats and the mounting seats are symmetrically provided with pin holes.

5. A passive retraction mechanism for a collapsible landing gear according to claim 1 wherein the connecting arm is arranged in an arcuate configuration at the end of the connecting arm which is connected to the bumper.

6. A passive retraction mechanism for a collapsible landing gear as claimed in claim 5 wherein the arcuate structure is provided with mounting holes.