CN106882358B - Multifunctional automatic positioning mechanism for cargo compartment door of large civil aircraft - Google Patents
Multifunctional automatic positioning mechanism for cargo compartment door of large civil aircraft Download PDFInfo
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- CN106882358B CN106882358B CN201710236479.2A CN201710236479A CN106882358B CN 106882358 B CN106882358 B CN 106882358B CN 201710236479 A CN201710236479 A CN 201710236479A CN 106882358 B CN106882358 B CN 106882358B
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- guide
- cabin door
- closing
- door
- lifting
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
The invention relates to a multifunctional automatic positioning mechanism for a cargo compartment door of a large civil aircraft, which comprises a guide groove structure, wherein the guide groove structure is arranged on a frame of the cargo compartment door of the aircraft body, a stop block is arranged at the top end of the guide groove, and a closing guide surface is arranged on the stop block corresponding to the side of the guide groove; the support is arranged on the cabin door frame, one side of the support is connected with a lifting guide wheel, a closing guide wheel is arranged between the support and the lifting guide wheel, and the axes of the closing guide wheel and the lifting guide wheel are vertical; the other side of the support is connected with a cabin door lifting mechanism; the lifting guide wheels are arranged in the guide grooves and move along the guide grooves, when the cabin door is lifted, the lifting guide wheels on the support move along the guide grooves, the closing guide wheels are contacted with the closing guide surfaces, and the lifting guide wheels move along the closing guide surfaces, so that guiding and positioning are realized. The invention can realize the automatic accurate positioning of the cabin door by self gravity in the closing process of the cabin door, and has a plurality of functions necessary for the cabin door of the people.
Description
Technical Field
The invention belongs to the technical field of civil aircraft manufacturing, and relates to a multifunctional automatic positioning mechanism for a cargo compartment door of a large civil aircraft, which is applied to a semi-blocked pressurizing compartment door widely used on the civil aircraft.
Prior Art
Because the size of the large-opening semi-blocked pressurized cargo compartment door of the civil aircraft is large, the compartment door has the risk of closing dislocation in the door closing process, and even has a certain probability of damage to the compartment door and the mouth frame. If the automatic positioning mechanism is additionally arranged independently, the weight of the cabin door can be increased, and the cabin door occupies a large space, so that the difficulty is brought to the layout of other mechanisms and structures.
Therefore, the research and development design of the automatic positioning mechanism with small occupied space, compact structure and light weight has important significance. The mechanism can not only meet the common functions of the cabin door, but also guide the cabin door to be automatically matched and positioned with the frame of the machine body in the closing process, thereby reducing the closing difficulty of the door, reducing the door closing errors caused by human factors and reducing the probability of dangerous accidents of the airplane.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a multifunctional automatic positioning mechanism for a cargo compartment door of a large civil aircraft. The invention provides a high-efficiency and accurate automatic positioning mechanism on the basis of not increasing weight and space additionally, so that the cabin door can realize automatic and accurate positioning of the cabin door by self gravity in the closing process, and meanwhile, the cabin door has multiple functions necessary for a cabin door.
The technical scheme adopted by the invention is as follows:
the invention relates to a multifunctional automatic positioning mechanism for a cargo compartment door of a large civil aircraft, which comprises the following components:
the guide groove structure is arranged on the frame of the machine body, a stop block is arranged at the top end of the guide groove, and a closing guide surface is arranged on the stop block corresponding to the side of the guide groove;
the support is arranged on the cabin door frame, one side of the support is connected with a lifting guide wheel, a closing guide wheel is arranged between the support and the lifting guide wheel, and the axes of the closing guide wheel and the lifting guide wheel are vertical; the other side of the support is connected with a cabin door lifting mechanism;
in the door closing process, when the cabin door enters the machine body opening frame, the closing guide wheel is contacted with the closing guide surface and moves along the closing guide surface to realize guiding and positioning; meanwhile, the lifting guide wheels are arranged in the guide grooves, and the constraint cabin door is closed along a fixed track;
in the door opening process, the lifting guide wheels move along the guide grooves until the cabin door completely avoids the obstacle of the machine body opening frame.
Further, the guide groove has a specific structure: for U type groove, this U type groove side I has the extension limit, the extension limit extends to closing the guide surface bottom, and extension limit and this U type groove side I arc transitional coupling, another side II has the level to turn over the limit, forms the orbit that promotes the guide pulley roll-off U type groove.
Further, the contact end of the extending edge of the U-shaped groove and the closing guide surface is close to the horizontal bending edge of the U-shaped groove, and the angle alpha between the extending edge and the side edge I of the U-shaped groove is 135-180 degrees.
Further, the U-shaped groove is obliquely arranged, and the angle beta between the U-shaped groove and the upper horizontal bending edge is 45-90 degrees.
Further, rib plates are respectively arranged at the arc transition positions of the bottom ends of the U-shaped grooves.
A cargo compartment door of a large civil aircraft is provided with 2 pairs of multifunctional automatic positioning mechanisms, each pair of the multifunctional automatic positioning mechanisms is symmetrically arranged, and two pairs of the multifunctional automatic positioning mechanisms are respectively arranged at the positions, close to the upper side and the lower side, of the cargo compartment door.
The invention has the beneficial effects that:
1. the invention can guide the cabin door to be lifted and opened smoothly. In the process of fully opening the semi-blocking type cabin door, two actions of lifting and opening are required to be completed. The cabin door lifting process is to avoid the cabin door stop block, and the cabin door can be smoothly opened only after the cabin door completely avoids the door frame stop block. According to the invention, the cabin door lifting curve is designed according to the position of the cabin door stop block, so that the lifting guide mechanism is designed, and the cabin door moves along the lifting curve to smoothly avoid the machine body stop block.
2. The invention can guide the auxiliary cabin door to smoothly reach the preset closing and locking position. In the closing process of the semi-blocking pressurizing cargo compartment door, the semi-blocking pressurizing cargo compartment door has certain probability of interfering with peripheral parts of the door frame and blocking due to the influences of environment, human factors and the like, so that the semi-blocking pressurizing cargo compartment door is functionally hindered. The closing guide wheel can guide the cabin door to reach a closing locking position along an ideal track in the closing process, and assist the large-opening pressurizing cabin door to be accurately matched and positioned with the frame of the machine body in the closing process, and assist the cabin door to be smoothly closed and locked.
3. The invention can bear the sudden wind negative pressure and the water forced drop negative pressure encountered by the cabin door. When the cabin door of the aircraft encounters sudden wind negative pressure or water forced landing negative pressure, the side wall of the guide groove is used as a main bearing surface to prevent the cabin door from moving towards the inside of the aircraft body and bear most of negative pressure load of the cabin door during water forced landing of the aircraft.
4. The invention can obviously reduce the mechanism damage caused by the front-back movement of the cabin door.
After the cabin door is completely closed, the cabin door moves back and forth in the mouth frame, impacts with different degrees are formed between door peripheral mechanisms and between the door skin and the fuselage skin, and the integrity of the mechanisms is seriously damaged. The closing guide surface is a specific bearing surface, so that front and back movement of the cabin door is effectively prevented, and mechanism damage caused by movement is remarkably reduced.
5. The invention can prevent the stop block from being damaged and invalid, thereby causing flight accidents. If the cabin door stop block is damaged and fails, the cabin door is forced to move to the outside of the machine body by the pressurizing load in the machine body, so that a safety accident is caused. The positioning mechanism can replace the cabin door stop block to bear the pressurizing load in the machine body when the cabin door stop block is damaged and fails.
Drawings
Fig. 1 is a schematic view of the structure of the cabin door in the closed state.
Fig. 2 is a schematic view of the lifting state structure of the cabin door of the present invention.
FIG. 3 is a schematic view of a guide wheel mechanism according to the present invention.
Fig. 4 is a schematic diagram of a guiding and positioning slot structure according to the present invention.
Fig. 5 is a schematic view of the different angles of fig. 4.
FIG. 6 is a schematic view of the installation position of the present invention.
Fig. 7 is an enlarged partial schematic view of fig. 6.
In the figure: 1. the device comprises a guide groove structure, a closing guide wheel, a support, a lifting guide wheel, a closing guide surface, a guide groove negative pressure bearing surface, a guide groove, a cabin door, an automatic positioning mechanism, a machine body opening frame and a cabin door opening frame.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Examples: as shown in fig. 1, the multifunctional automatic positioning mechanism for the cargo compartment door of the large civil aircraft of the invention comprises:
the guide groove structure 1 is arranged on a frame 10 of the machine body, a stop block is arranged at the top end of the guide groove 7, and a closing guide surface 5 is arranged on the stop block corresponding to the side of the guide groove 7;
the support 3 is arranged on the cabin door frame 11, one side of the support 3 is connected with the lifting guide wheel 4, the closing guide wheel 2 is arranged between the support 3 and the lifting guide wheel 4, and the axes of the closing guide wheel 2 and the lifting guide wheel 4 are vertical; the other side of the support is connected to the door frame, the cabin door lifting mechanism lifts the cabin door, and the cabin door lifting guide wheels 4 on the cabin door control the motion trail of the cabin door under the constraint of the guide grooves 7; the cabin door lifting mechanism is of an existing cabin door structure.
In the closing process, when the cabin door 8 enters the machine body opening frame 10, the closing guide wheel 2 contacts with the closing guide surface 5 and moves along the closing guide surface 5 to realize guiding and positioning; meanwhile, the lifting guide wheels 4 are arranged in the guide grooves 7, and the cabin door is restrained from being closed along a fixed track.
In the door opening process, the lifting guide wheels 4 move along the guide grooves 7 until the cabin door completely avoids the obstacle of the machine body opening frame 10.
The guide groove 7 has a specific structure: the U-shaped groove is formed by the U-shaped groove, the side I71 of the U-shaped groove is provided with an extension edge 72, the extension edge 72 extends to the bottom end of the closing guide surface 5, the extension edge 72 is in arc transition connection with the side I71 of the U-shaped groove, and the other side II 73 is provided with a horizontal bending edge 74, so that the track of the lifting guide wheel 4 sliding out of the U-shaped groove is formed.
The contact end of the extending edge 72 of the U-shaped groove and the closing guide surface 5 is close to the bending edge 74 of the U-shaped groove, and the angle alpha between the extending edge 72 and the side edge I71 of the U-shaped groove is 135-180 degrees, and 135 degrees is selected in this example.
The U-shaped slot is inclined at an angle beta of 45 deg. -90 deg., in this example beta being chosen to be 45 deg. to the upper horizontal fold 74.
The arc transition positions at the bottom end of the U-shaped groove are respectively provided with a rib plate 75 for supporting and enhancing strength.
As shown in fig. 6, the invention is used for a cargo compartment door of a large civil aircraft, and the cargo compartment door is provided with 2 pairs of multifunctional automatic positioning mechanisms according to the invention, wherein each pair of the multifunctional automatic positioning mechanisms are symmetrically arranged, and two pairs of the multifunctional automatic positioning mechanisms are respectively arranged at positions, close to the upper side and the lower side, of the cargo compartment door.
According to the lifting guide wheel, the lifting guide wheel moves in the guide groove according to the motion track of the opening lifting of the cabin door, and the lifting guide wheel and the lifting mechanism of the cabin door together precisely control the posture and the position of the cabin door in the vertical plane navigation direction; the closing guide wheels move along the preset closing guide surfaces according to the movement tracks of opening and closing the cabin door, so that the two groups of guide wheels are used as the damage safety design of the lifting guide wheels, simultaneously, the two groups of guide wheels are used as the damage safety backup of the cabin door and the machine body stop block, and the influence of water forced landing and negative pressure load can be borne. The two guide wheels are used for positioning the cabin door at the position of the aircraft course, guiding the cabin door to accurately enter the range of the frame of the aircraft body when the cabin door is closed, and resisting the influences of deformation, accidental load and sudden wind load, so that the two groups of guide wheels accurately enter the guide groove.
Example 2: this example differs from example 1 in that: according to different hatch door lifting curve designs, the angle alpha between the extending edge 72 of the U-shaped groove and the side edge I71 of the U-shaped groove is 150 degrees. The angle beta between the horizontal folds 74 in the U-shaped groove is 60 deg..
Example 3: this example differs from example 1 in that: according to different hatch door lifting curve designs, the angle alpha between the extending edge 72 of the U-shaped groove and the side edge I71 of the U-shaped groove is 180 degrees. The angle beta between the horizontal folds 74 in the U-shaped groove is 90 deg..
The working process of the invention comprises the following steps:
1. lifting a cabin door:
when an operator moves the handle to open the cabin door, the cabin door is lifted by the opening driving force through the lifting mechanism, and the lifting guide wheels 4 are arranged on the cabin door, so that the guide grooves 7 force the lifting guide wheels 4 in the grooves to move along the lifting curve, and the lifting movement of the cabin door avoiding the machine body stop block is completed.
2. Auxiliary closing:
in the closing process of the cabin door, if the cabin door is integrally deformed and cannot move along an ideal track, the closing guide wheels 2 on the two sides of the cabin door are contacted with the corresponding closing guide surfaces 5 to guide the cabin door to smoothly reach an ideal closing position
3. And (3) bearing negative pressure:
when the airplane encounters sudden wind negative pressure or water forced landing negative pressure, the lifting guide wheels 4 are in contact with the negative pressure bearing surface 6 of the guide groove, and the negative pressure borne by the cabin door completely acts on the negative pressure bearing surface 6 of the guide groove through the lifting guide wheels 4, so that the cabin door is prevented from moving towards the inside of the airplane body.
4. Preventing the cabin door from moving:
when the cabin door moves forwards and backwards due to sudden wind load or unpredictable load, the closing guide wheel 2 is in contact with the guide groove closing guide surface 5, so that the front and back movement of the cabin door is effectively prevented, and even the inside of the cabin door and peripheral mechanisms are damaged.
Claims (3)
1. The utility model provides a multi-functional automatic positioning mechanism of large-scale civil aircraft cargo compartment door which characterized in that: comprising the following steps:
the guide groove structure is arranged on the frame of the machine body, a stop block is arranged at the top end of the guide groove, and a closing guide surface is arranged on the stop block corresponding to the side of the guide groove;
the support is arranged on the cabin door frame, one side of the support is connected with a lifting guide wheel, a closing guide wheel is arranged between the support and the lifting guide wheel, and the axes of the closing guide wheel and the lifting guide wheel are vertical; the other side of the support is connected with a cabin door lifting mechanism;
in the door closing process, when the cabin door enters the machine body opening frame, the closing guide wheel is contacted with the closing guide surface and moves along the closing guide surface to realize guiding and positioning; meanwhile, the lifting guide wheels are arranged in the guide grooves, and the constraint cabin door is closed along a fixed track;
in the door opening process, the lifting guide wheels move along the guide grooves until the cabin door completely avoids the obstacle of the machine body opening frame;
the guide groove has the specific structure that: the lifting guide wheel sliding track is formed by a U-shaped groove, wherein the side I of the U-shaped groove is provided with an extension edge which extends to the bottom end of a closing guide surface, the extension edge is in arc transition connection with the side I of the U-shaped groove, and the other side II is provided with a horizontal bending edge;
the contact end of the extending edge of the U-shaped groove and the closing guide surface is close to the horizontal bending edge of the U-shaped groove, and the angle alpha between the extending edge and the side edge I of the U-shaped groove is 135-180 degrees; and rib plates are respectively arranged at the arc transition positions of the bottom ends of the U-shaped grooves.
2. A multi-function automatic positioning mechanism for cargo hold doors of large civil aircraft as claimed in claim 1, wherein: the U-shaped groove is obliquely arranged, and the angle beta between the U-shaped groove and the upper horizontal bending edge is 45-90 degrees.
3. A cargo compartment door for a large civil aircraft, comprising 2 pairs of the multifunctional automatic positioning mechanisms according to any one of claims 1-2, each pair being symmetrically arranged, and two pairs being respectively arranged at the positions of the compartment door near the upper and lower sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710236479.2A CN106882358B (en) | 2017-04-12 | 2017-04-12 | Multifunctional automatic positioning mechanism for cargo compartment door of large civil aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710236479.2A CN106882358B (en) | 2017-04-12 | 2017-04-12 | Multifunctional automatic positioning mechanism for cargo compartment door of large civil aircraft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106882358A CN106882358A (en) | 2017-06-23 |
| CN106882358B true CN106882358B (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710236479.2A Active CN106882358B (en) | 2017-04-12 | 2017-04-12 | Multifunctional automatic positioning mechanism for cargo compartment door of large civil aircraft |
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| CN (1) | CN106882358B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB675778A (en) * | 1949-10-12 | 1952-07-16 | Saunders Roe Ltd | A new or improved lock for the door of an aircraft pressure cabin |
| US4473201A (en) * | 1982-10-29 | 1984-09-25 | The Boeing Company | Canopy-type aircraft cargo door and actuating mechanisms |
| US6457675B1 (en) * | 2001-06-25 | 2002-10-01 | The Boeing Company | Hydraulic actuation system for cargo doors with cam-type latches |
| CN201933973U (en) * | 2011-02-17 | 2011-08-17 | 中国航空工业集团公司西安飞机设计研究所 | Composite material back cargo hold door |
| CN204998746U (en) * | 2015-07-30 | 2016-01-27 | 中航沈飞民用飞机有限责任公司 | Civil aircraft partly blocks up formula hatch door guide way |
| CN105667757A (en) * | 2016-04-05 | 2016-06-15 | 中航沈飞民用飞机有限责任公司 | Double-bent-section and semi-blocking type cargo space door of civil airplane |
| CN206664915U (en) * | 2017-04-12 | 2017-11-24 | 江苏美龙航空部件有限公司 | A kind of large-scale multi-functional automatic positioning mechanism of civil aircraft cargo door |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5135110B2 (en) * | 2008-08-01 | 2013-01-30 | ホンダ・パテンツ・アンド・テクノロジーズ・ノース・アメリカ・エルエルシー | Aircraft sliding door equipment |
-
2017
- 2017-04-12 CN CN201710236479.2A patent/CN106882358B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB675778A (en) * | 1949-10-12 | 1952-07-16 | Saunders Roe Ltd | A new or improved lock for the door of an aircraft pressure cabin |
| US4473201A (en) * | 1982-10-29 | 1984-09-25 | The Boeing Company | Canopy-type aircraft cargo door and actuating mechanisms |
| US6457675B1 (en) * | 2001-06-25 | 2002-10-01 | The Boeing Company | Hydraulic actuation system for cargo doors with cam-type latches |
| CN201933973U (en) * | 2011-02-17 | 2011-08-17 | 中国航空工业集团公司西安飞机设计研究所 | Composite material back cargo hold door |
| CN204998746U (en) * | 2015-07-30 | 2016-01-27 | 中航沈飞民用飞机有限责任公司 | Civil aircraft partly blocks up formula hatch door guide way |
| CN105667757A (en) * | 2016-04-05 | 2016-06-15 | 中航沈飞民用飞机有限责任公司 | Double-bent-section and semi-blocking type cargo space door of civil airplane |
| CN206664915U (en) * | 2017-04-12 | 2017-11-24 | 江苏美龙航空部件有限公司 | A kind of large-scale multi-functional automatic positioning mechanism of civil aircraft cargo door |
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| Publication number | Publication date |
|---|---|
| CN106882358A (en) | 2017-06-23 |
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