CN109229333B - Pull rod structure of aircraft freight cabin door - Google Patents
Pull rod structure of aircraft freight cabin door Download PDFInfo
- Publication number
- CN109229333B CN109229333B CN201811114870.6A CN201811114870A CN109229333B CN 109229333 B CN109229333 B CN 109229333B CN 201811114870 A CN201811114870 A CN 201811114870A CN 109229333 B CN109229333 B CN 109229333B
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- CN
- China
- Prior art keywords
- pull rod
- support
- cabin door
- airplane
- pulley seat
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/14—Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
- B64C1/1407—Doors; surrounding frames
- B64C1/1415—Cargo doors, e.g. incorporating ramps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
Abstract
The invention relates to a pull rod structure of a freight cabin door of an airplane, and belongs to the technical field of airplane structure design. The inconsistent movement of the two sides of the cabin door can be caused by insufficient assembly precision of the cabin door and insufficient rigidity of a large opening area of an airplane. The pull rod structure comprises a support, a pulley seat, a pulley, a T-shaped stop block, a pull rod body, a lower joint, a limiting block and the like; the support is hinged to the airplane body at one end, and the other end of the support is limited by a limit block gap on the airplane body, so that the support can rotate within a very small angle range; the pulley seat is arranged on the support, and the pull rod body passes through a notch formed by the pulley seat and the support and contacts with the pulley; the pull rod is connected with the cabin door through the lower support. The problems of inaccurate movement positioning and low reliability of the hydraulic actuating cylinder are solved; the pull rod support is arranged to be a rotatable structure, so that the pull rod can perform angle compensation when the cabin door is opened and closed, the problems of left and right deflection and unbalanced movement of the cabin door are solved, and the pull rod can smoothly slide.
Description
Technical Field
The invention relates to a pull rod structure of a freight cabin door of an airplane, and belongs to the technical field of airplane structure design.
Background
In transport airplanes at home and abroad, the cargo hold door of the airplane is mostly in a double-door structure which is opened up and down, and the front hold door of the cargo hold is driven by a hydraulic actuator to be opened downwards and closed upwards; in flight, a front cabin door of a cargo hold is generally used as an air-drop air-landing platform of an airplane, and a passage for personnel to enter and exit, load and unload cargos is formed on the ground; therefore, in order to meet the air drop function, a special structure is required to be arranged for bearing the positioning of the opened front cabin door and bearing the freight load during air drop and cargo loading and unloading, so that the stability of the cabin door is kept, and the problem of insufficient reliability of the driving and positioning of the cabin door only through a hydraulic actuator is solved; in addition, the inconsistent movement of two sides of the cabin door caused by insufficient assembly precision of the cabin door and insufficient rigidity of a large opening area of an airplane needs to be overcome through mechanism arrangement, and when the cabin door has certain deflection or unbalanced left and right movement, the two sides of the cabin door can still be kept balanced, so that the local damage caused by uneven load bearing of the cabin door in airdrop and air-drop and freight transportation is prevented.
Disclosure of Invention
The invention provides a pull rod structure of a freight cabin door of an airplane, which can effectively bear the freight load of the cabin door, has the functions of positioning and stabilizing balance on the cabin door and improves the reliability of the freight function of the cabin door.
The invention designs a pull rod structure of an airplane freight cabin door, which is used for air drop, air drop or freight of the airplane cabin door. The pull rod structure consists of a support, a pulley seat, a pulley, a T-shaped stop block, a pull rod body, a lower joint and a limiting block; the support is hinged to the airplane body at one end, and the other end of the support is limited by a limit block gap on the airplane body, so that the support can rotate within a very small angle range; the pulley seat is arranged on the support, and the pull rod body passes through a notch formed by the pulley seat and the support and contacts with the pulley; the pull rod is connected with the cabin door through the lower support. Therefore, in the process of opening and closing the cabin door, the pull rod penetrates through the support and slides up and down through the central notch of the pulley seat, the upper part of the pull rod is connected with the T-shaped stop block, after the cabin door is opened downwards to a certain position, the T-shaped stop block is contacted with the upper part of the pulley seat, and the pull rod stops moving, so that the opening position of the cabin door is limited, a positioning effect is achieved, and when the air drop and air freight transportation function is carried out at the moment, the pull rod plays a role in suspension.
Has the advantages that: the suspension positioning of the freight cabin door by the freight cabin door pull rod structure is purely mechanical limiting, and the problems of inaccurate movement positioning and low reliability of the hydraulic actuating cylinder are solved; the pull rod support is arranged into a rotatable structure, so that the pull rod can perform angle compensation in the opening and closing process of the cabin door, the problems of left and right deflection and unbalanced movement of the cabin door are solved, and the pull rod can smoothly slide; the arrangement of the pull rod can ensure that the distribution of the cabin door after opening is uniform when bearing loads such as freight and the like, and effectively avoids the damage of the cabin door or the body structure caused by the overlarge local bearing load.
Drawings
FIG. 1 is a major view of the drawbar mechanism according to the present invention;
fig. 2 is a left side view of the pull rod structure of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
the pull rod structure comprises a support 4, a pulley seat 2, a pulley 3, a T-shaped stop block 1, a pull rod body 5, a cabin door joint 6, a limiting block 7 and the like. The support 4 of the pull rod structure is hinged to an airplane body 8 at one end, the other end of the support is limited by a limiting block 7 on the airplane body 8 in a clearance mode, and the support 4 can rotate within the range of 3 degrees. The lower part of the pull rod body 5 is connected with the tail end of a cabin door 9 through a cabin door joint 6, and a pair of pull rod structures are used. The pulley seat 2 is arranged on the support 4, the pull rod body 5 penetrates through the notches of the pulley seat 2 and the support 4, and the rod part is contacted with the pulley 3; the pull rod body 5 slides up and down along the gap between the notch and the roller 3 in the opening and closing process of the cabin door 9; the upper part of the pull rod body 5 is connected with the T-shaped stop block 1, and after the cabin door 9 is opened in place, the T-shaped stop block 1 is in surface contact with the upper surface of the pulley seat 2, so that the limiting and bearing effects are realized.
Claims (4)
1. The utility model provides an aircraft freight cabin door pull rod structure, includes pull rod body (5), and its tip is connected with hatch door (9), its characterized in that: the pull rod structure further comprises a rotating support (4) which is arranged on the machine body support (8) and has a certain rotating range, a pulley seat (2) is arranged on the rotating support (4), the rod part of the pull rod body (5) penetrates through a notch of the rotating support (4) and the pulley seat (2), and the end part of the pull rod body is limited when the pull rod moves to the pulley seat (2); the pulley seat (2) is internally provided with paired pulleys (3), a pull rod body (5) moves between the pulleys (3), and the end part of the pull rod body (5) is connected with a T-shaped stop block (1) which is limited by the end surface of the pulley seat (2); a limiting block (7) is installed on the machine body support (8), one end of the rotating support (4) is hinged to the machine body support (8), and the other end of the rotating support is located on the inner side of the limiting block (7) and has a certain moving range.
2. The aircraft cargo hold door drawbar arrangement according to claim 1, wherein: the end part of the pull rod body (5) is connected with a cabin door (9) through a cabin door joint (6).
3. The aircraft cargo hold door drawbar arrangement according to claim 1, wherein: the rotating range of the rotating support (4) is 1-5 degrees.
4. The aircraft cargo hold door drawbar arrangement according to claim 1, wherein: a pair of tie rod structures is used simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811114870.6A CN109229333B (en) | 2018-09-25 | 2018-09-25 | Pull rod structure of aircraft freight cabin door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811114870.6A CN109229333B (en) | 2018-09-25 | 2018-09-25 | Pull rod structure of aircraft freight cabin door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109229333A CN109229333A (en) | 2019-01-18 |
| CN109229333B true CN109229333B (en) | 2021-11-02 |
Family
ID=65056117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811114870.6A Active CN109229333B (en) | 2018-09-25 | 2018-09-25 | Pull rod structure of aircraft freight cabin door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109229333B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111003198A (en) * | 2019-12-27 | 2020-04-14 | 中国航空工业集团公司西安飞机设计研究所 | Airplane cabin door connecting rod force fixing method and device |
| CN113335494A (en) * | 2020-03-02 | 2021-09-03 | 中航西飞民用飞机有限责任公司 | Support structure and support method for upturning cargo hold door of airplane |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB940168A (en) * | 1961-07-19 | 1963-10-23 | Vickers Armstrongs Aircraft | Improvements in doors and supporting structures |
| US5704569A (en) * | 1995-05-12 | 1998-01-06 | The Boeing Company | Counterbalance mechanism for inwardly and upwardly opening plug-type airplane cargo doors |
| CN1076687C (en) * | 1996-08-22 | 2001-12-26 | 波音公司 | Counterbalance mechanism for inwardly and upwardly opening plug-type airplane cargo doors |
| DE102009038781B4 (en) * | 2009-08-25 | 2015-05-21 | Airbus Operations Gmbh | Device for the premature detection of the closing state of a closure element for a space opening, closure device for a cargo hold of an aircraft, use and aircraft |
| CN204826956U (en) * | 2015-08-14 | 2015-12-02 | 中国航空工业集团公司西安飞机设计研究所 | Lock subassembly and have its hatch door assembly and aircraft |
| CN105667757B (en) * | 2016-04-05 | 2017-11-17 | 中航沈飞民用飞机有限责任公司 | A kind of blocking type cargo door of civil aircraft hyperbolic section half |
| CN206171789U (en) * | 2016-09-23 | 2017-05-17 | 江西洪都航空工业集团有限责任公司 | Collapsible hatch door |
-
2018
- 2018-09-25 CN CN201811114870.6A patent/CN109229333B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109229333A (en) | 2019-01-18 |
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