CN113753224B - Separated landing gear stay bar lock mechanism - Google Patents
Separated landing gear stay bar lock mechanism Download PDFInfo
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- CN113753224B CN113753224B CN202111102670.0A CN202111102670A CN113753224B CN 113753224 B CN113753224 B CN 113753224B CN 202111102670 A CN202111102670 A CN 202111102670A CN 113753224 B CN113753224 B CN 113753224B
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- Prior art keywords
- stay bar
- locking
- hinged
- unlocking
- spring
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/02—Undercarriages
- B64C25/08—Undercarriages non-fixed, e.g. jettisonable
- B64C25/10—Undercarriages non-fixed, e.g. jettisonable retractable, foldable, or the like
- B64C25/18—Operating mechanisms
- B64C25/26—Control or locking systems therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/02—Undercarriages
- B64C25/08—Undercarriages non-fixed, e.g. jettisonable
- B64C25/10—Undercarriages non-fixed, e.g. jettisonable retractable, foldable, or the like
- B64C25/18—Operating mechanisms
- B64C25/22—Operating mechanisms fluid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention belongs to the technical field of aircraft design, and particularly relates to a separated landing gear stay bar lock mechanism. The structure comprises an upper locking stay bar, a lower locking stay bar, a main stay bar and a main stay bar, wherein the upper locking stay bar is hinged with the lower locking stay bar; an upper locking stay bar, a lower locking stay bar, a main stay bar and a pillar form a plane four-bar mechanism; the spring is hinged between the middle part of the lower locking stay bar and the middle part of the main stay bar, the spring is always in a stretching state, a rotation stopping device is arranged at the hinged part of the lower locking stay bar and the upper locking stay bar, and when the upper locking stay bar and the lower locking stay bar are in a substantially straight line position, the rotation stopping device resists the tension of the spring, so that the hinge point of the upper locking stay bar and the lower locking stay bar stops moving towards the tension direction of the spring. The upper and lower stay bar locks are provided with separate unlocking rocker arms, so that the whole part is of a composite mechanical structure, and the whole structure volume is reduced.
Description
Technical Field
The application belongs to the technical field of aircraft design, and particularly relates to a separated landing gear stay bar lock mechanism.
Background
The invention belongs to the landing gear stay bar lock technology, which is suitable for landing gear down locking function. The landing gear needs to be reliably kept at the down position after being put down, the landing gear needs to be opened before being folded, the common stay bar lock is connected with the unlocking actuating cylinder, and the requirement on the folding and unfolding space is large; the unlocking cylinder of the stay bar lock becomes the load for the landing gear to be retracted after the common stay bar lock is unlocked.
Disclosure of Invention
In order to solve the problems, the invention provides a separated landing gear stay bar locking mechanism, which comprises an upper locking stay bar, a lower locking stay bar and a spring;
the upper locking stay bar is hinged with the lower locking stay bar, the lower locking stay bar is hinged with the main stay bar, and the main stay bar is hinged with the support column; an upper locking stay bar, a lower locking stay bar, a main stay bar and a pillar form a plane four-bar mechanism;
the spring is hinged between the middle part of the lower lock stay bar and the middle part of the main stay bar, the spring is always in a stretching state, a rotation stopping device is arranged at the hinged part of the lower lock stay bar and the upper lock stay bar, and when the upper lock stay bar and the lower lock stay bar are in a substantially straight line position, the rotation stopping device resists the tension of the spring, so that the hinge point of the upper lock stay bar and the lower lock stay bar stops moving towards the tension direction of the spring;
an unlocking actuating cylinder is hinged to one end of the lower lock stay bar, which is close to the support column; an unlocking rocker arm is hinged at the hinged position of the upper locking stay bar and the lower locking stay bar, the unlocking rocker arm is hinged with an unlocking actuating cylinder, and the unlocking rocker arm, the unlocking actuating cylinder and the lower locking stay bar form a triangle; the unlocking rocker arm is provided with a boss, a bearing platform is arranged at the corresponding position of the locking stay bar, and when the locking stay bar and the lower locking stay bar are in a straight line, the boss is contacted with the bearing platform of the locking stay bar, and the structure is locked; when the unlocking actuating cylinder stretches, the unlocking rocker arm takes the boss as a fulcrum to enable the hinged position of the lower locking stay bar and the upper locking stay bar to be subjected to component force in the direction of resisting the tension force of the spring, so that the hinged position of the lower locking stay bar and the upper locking stay bar which are locked moves along the direction opposite to the tension force of the spring.
Preferably, the rotation stopping device is arranged at the hinge position of the lower locking stay bar and the upper locking stay bar, and comprises a deflection adjusting cushion block arranged on the upper locking stay bar and a rotation stopping boss arranged on the lower locking stay bar, when the rotation stopping boss is contacted with the deflection adjusting cushion block, the hinge point of the upper locking stay bar and the lower locking stay bar stops moving towards the tensile force direction of the spring;
preferably, the bearing platform of the locking stay bar and the deflection adjusting cushion block are of an integrated structure, and when the separated landing gear stay bar locking mechanism is in the structure locking state, a reserved gap is reserved between the boss and the deflection adjusting cushion block.
Preferably, the lower locking stay bar gradually contracts from one end of the hinged main stay bar along the other end; one end of the lower locking stay bar hinged unlocking rocker arm is of a double-lug structure, the unlocking rocker arm is arranged between the double-lug structure, the length of the double-lug structure is larger than one half of the length of the unlocking rocker arm, the width of the tail end of the double-lug structure is not lower than 80% of the width of the tail end of the locking stay bar, and the boss is arranged at the top point of the tail end of the double-lug structure.
Preferably, the hinge joint of the unlocking actuating cylinder and the main stay bar is provided with a hanging lug, so that a gap exists between the unlocking actuating cylinder and the main stay bar.
Preferably, the unlocking actuating cylinder is a hydraulic cylinder, the hydraulic cylinder comprises an oil outlet and an oil inlet, the oil outlet and the oil inlet are hinged to two sides of the outer cylinder, and the oil outlet and the oil inlet can rotate around the hinged position; the unlocking actuating cylinder is internally provided with a spring for resetting, and the automatic mechanical resetting can be realized after pressure relief.
Preferably, the lower locking stay bar and the upper locking stay bar are of I-beam structures, and the lower locking stay bar and the upper locking stay bar are matched in size and can be mutually folded.
Preferably, the articulated department of lower lock vaulting pole and last lock vaulting pole is provided with the connecting axle, and the articulated lower lock vaulting pole of connecting axle is with last lock vaulting pole, the connecting axle is provided with binary channels lubrication circuit, and lubrication circuit oil inlet is sealed by the blanking cover.
Preferably, the joint of the locking stay bar and the support column is provided with a joint bearing, and the joint bearing has all-dimensional rotation freedom degree and can adapt to micro motion generated in the retraction process of the landing gear.
Preferably, the springs are symmetrically distributed on two sides of the lower lock stay bar.
The application has the advantages that: the invention belongs to the landing gear stay bar lock technology, which is suitable for landing gear down locking function. The locking spring of the stay bar lock has double backups, so that the locking function of the stay bar lock can be well ensured; the split type unlocking mechanism is designed, after the stay bar is locked, the unlocking rocker arm is separated from the locking stay bar, so that the stowage load can be greatly reduced; the special unlocking mechanism can also ensure that the unlocking actuating cylinder is not laterally bent and loaded; meanwhile, the folding angle of the stay bar lock is large, and the occupied space after the stay bar lock is folded is small. The main innovation points of the invention are as follows: 1. the folding angle is large; the occupied space is small after the folding; 2. the split unlocking mechanism is characterized in that after the stay bar locks the locks, the unlocking rocker arm is separated from the lock stay bar; 3. the locking spring has double backups, and the locking function of the locking spring can be well ensured.
Drawings
FIG. 1 is a schematic view of a breakaway landing gear strut lock mechanism provided by the present invention.
Fig. 2 is a schematic diagram of a locking state of a stay bar lock provided by the invention.
Fig. 3 is a schematic diagram of an unlocking process state of the stay bar lock provided by the invention.
Fig. 4 is a schematic view of a stay bar lock in a retracted state.
FIG. 5 is a schematic diagram of an upper stay lock and deflection adjustment block provided by the present invention.
Fig. 6 is a detailed illustration of the upper stay lock provided by the present invention.
Fig. 7 is an explanatory diagram of a spring provided by the present invention.
Fig. 8 is a part view of an unlocking rocker arm provided by the invention.
Fig. 9 is an assembly schematic diagram of an unlocking rocker arm provided by the invention.
Fig. 10 is a view of the lower lock stay bar part provided by the invention.
FIG. 11 is a cross-sectional view of a lower lock stay provided by the present invention.
Fig. 12 is a schematic view of an unlocking cylinder provided by the present invention.
Fig. 13 is a schematic view of a connecting shaft of an up-down lock stay provided by the invention.
The device comprises a 1-locking stay bar, a 2-unlocking rocker arm, a 3-unlocking actuating cylinder, a 4-lower locking stay bar, a 5-spring, a 6-safety pin hole, a 7-main stay bar, an 8-pillar, a 9-deflection adjusting cushion block, an 11-spring connecting bolt, a 12-upper and lower locking stay bar connecting shaft, a 13-blocking cover, a 15-adjusting joint and a 16-reset spring.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the following describes the technical solutions in the embodiments of the present application in more detail with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without undue burden are within the scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
A separate landing gear strut lock mechanism as described in figures 1 to 5 comprising an upper lock strut 1 as in figure 6, a lower lock strut 4 as in figures 10 to 11 and a spring 5 as in figure 7;
the upper locking stay bar 1 is hinged with the lower locking stay bar 4, the lower locking stay bar 4 is hinged with the main stay bar 7, and the main stay bar 7 is hinged with the supporting column 8; the upper locking stay bar 1, the lower locking stay bar 4, the main stay bar 7 and the support column 8 form a plane four-bar mechanism;
the spring 5 is hinged between the middle part of the lower lock stay bar 4 and the middle part of the support column 8, the spring 5 is always in a stretching state, a rotation stopping device is arranged at the hinge position of the lower lock stay bar 4 and the upper lock stay bar 1, and when the upper lock stay bar 1 and the lower lock stay bar 4 are in a substantially straight line position, the rotation stopping device resists the tension of the spring 5, so that the hinge point of the upper lock stay bar 1 and the lower lock stay bar 4 stops moving towards the tension direction of the spring; locking and putting down principle: when the landing gear is put down, the unlocking cylinder 2 is kept in a shortened position; after the landing gear is put down in place, the lower locking stay bar 4 continues to move downwards under the action of the spring 5 until the deflection adjusting cushion block 9 is attached to the lower locking stay bar 4 and forms a downward deflection forming locking mechanism with the upper locking stay bar, so that the landing gear is fixed at the put-down position;
the unlocking and folding principle is as shown in fig. 3: when the landing gear is retracted, the unlocking actuating cylinder 3 firstly stretches to drive the unlocking rocker arm 2 to rotate anticlockwise, the unlocking rocker arm 2 drives the locking supporting rod 1 to rotate anticlockwise, and the deflection of the locking supporting rod is changed from bottom to top; the lock mechanism is unlocked, and the landing gear is retracted under the action of the retraction actuator cylinder; and the landing gear is retracted to lock and release pressure, and then the unlocking actuator cylinder is automatically and mechanically reset.
An unlocking actuating cylinder 3 is hinged at one end of the lower lock stay bar 4 close to the main stay bar 7; the hinged part of the upper lock stay bar 1 and the lower lock stay bar 4 is hinged with an unlocking rocker arm 2, the unlocking rocker arm 2 is hinged with an unlocking actuator cylinder 3, and the unlocking rocker arm 2, the unlocking actuator cylinder 3 and the lower lock stay bar 4 form a triangle; a boss is arranged on the unlocking rocker arm 2, a bearing platform is arranged at the corresponding position of the locking support rod 1, and when the locking support rod 1 and the lower locking support rod 4 are in a straight line, the boss is contacted with the bearing platform of the locking support rod 1, and the structure is locked; when the unlocking cylinder 3 stretches, the unlocking rocker 2 takes the boss as a fulcrum to enable the hinged position of the lower locking support rod 4 and the locking support rod 1 to be subjected to component force in the direction of resisting the tension of the spring 5, so that the hinged position of the lower locking support rod 4 and the locking support rod 1 which are locked moves along the direction opposite to the tension of the spring 5.
The deflection of the main stay bar is close to 0, and smaller deflection exists between the lock stay bars downwards; the deflection can be adjusted by a deflection adjusting cushion block 9; the folding angle is large after unlocking; the occupied space is small after the folding;
the deflection adjusting cushion block 9 is concave, the convex part of the deflection adjusting cushion block is matched with the lower lock stay bar, and the concave area is matched with the unlocking rocker arm;
the design is provided with a split unlocking mechanism which is mainly completed through a newly added unlocking rocker arm 2; after the stay bar lock is unlocked, the unlocking rocker arm is separated from the lock stay bar; the unlocking rocker arm and the lock stay rod share the same shaft; the unlocking rocker arm and the locking stay bar do not move relatively in the unlocking process; the unlocking rocker arm is provided with an independent fitting adjustment link design boss;
one end of the connecting point of the locking stay bar 1 is a joint bearing, so that lateral micro-motion can be self-adaptive in the retraction process of the undercarriage; the design of the I-beam with the inclination angle customized from the middle to the large folding angle; .
The lower lock stay bar 4 is designed with a unique I-beam combination shape, and the end part of the lower lock stay bar is convex and is used for fitting the deflection of the lock mechanism; the middle double lug inclined plane has a specific inclination angle, the middle and rear double barrel bulges are used for connecting springs, and the rear part is provided with independent safety pin holes;
after the locking is put down, the unlocking rocker arm 2, the deflection adjusting cushion block 9 and the lower locking support rod 4 are all provided with gaps, so that the support rod can be locked, and the unlocking rocker arm and the unlocking actuating cylinder in the locking state can be prevented from bearing load; the gap can be adjusted by an adjusting joint 15 of the unlocking actuator cylinder;
the two cavities of the unlocking actuating cylinder 3 are connected with pipe connectors which are positioned at two sides of the outer cylinder and are in a symmetrical state, and the two joint connectors can rotate along with each other in the process of retraction; a spring 16 for resetting is designed in the inner part of the valve body, and the valve body can be reset automatically after pressure relief;
the upper and lower lock stay bar connecting shaft 12 is designed with a unique space lubrication channel, and double ears of the lock stay bar are lubricated downwards from the side direction of the bolt end; the space lubrication channel is sealed by a blanking cover 13 to connect shaft lubrication oil.
The safety pin hole 6 is arranged between the lower locking stay bar and the stay bar; the occurrence of safety pin holes for the accidental retraction failure of the landing gear on the ground can be avoided to a greater extent;
the spring 5 of the lock mechanism is provided with double backups, each spring end is provided with independent lubrication, and an independent mounting process hole is designed, so that the disassembly, assembly and maintenance of the spring are facilitated; the spring and the spring connector are designed separately, so that the force value can be adjusted;
the main body part of the spring connecting shaft 11 is not threaded, so that the service life can be prolonged; the middle part is smaller, and the installation is convenient.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. A separate landing gear stay bar lock mechanism, which comprises an upper lock stay bar (1), a lower lock stay bar (4) and a spring (5);
the upper locking stay bar (1) is hinged with the lower locking stay bar (4), the lower locking stay bar (4) is hinged with the main stay bar (7), and the main stay bar (7) is hinged with the support column (8); the upper locking stay bar (1), the lower locking stay bar (4), the main stay bar (7) and the support column (8) form a plane four-bar mechanism;
the spring (5) is hinged between the middle part of the lower locking stay bar (4) and the middle part of the support column (8), the spring (5) is always in a stretching state, a rotation stopping device is arranged at the hinged part of the lower locking stay bar (4) and the upper locking stay bar (1), and when the upper locking stay bar (1) and the lower locking stay bar (4) are in a nearly straight line position, the rotation stopping device resists the tension of the spring (5) so that the hinge point of the upper locking stay bar (1) and the lower locking stay bar (4) stops moving towards the tension direction of the spring;
the method is characterized in that: an unlocking actuating cylinder (3) is hinged at one end of the lower locking stay bar (4) close to the main stay bar (7); an unlocking rocker arm (2) is hinged at the hinged position of the upper locking stay bar (1) and the lower locking stay bar (4), the unlocking rocker arm (2) is hinged with an unlocking actuating cylinder (3), and the unlocking rocker arm (2), the unlocking actuating cylinder (3) and the lower locking stay bar (4) form a triangle; a boss is arranged on the unlocking rocker arm (2), a bearing platform is arranged at a corresponding position of the locking support rod (1), and when the locking support rod (1) and the lower locking support rod (4) are in a straight line, the boss is contacted with the bearing platform of the locking support rod (1) and the structure is locked; when the unlocking actuating cylinder (3) stretches, the unlocking rocker (2) takes the boss as a fulcrum to enable the hinged position of the lower locking support rod (4) and the upper locking support rod (1) to be subjected to component force against the tensile force direction of the spring (5), so that the hinged position of the lower locking support rod (4) and the upper locking support rod (1) which are locked moves along the opposite direction of the tensile force of the spring (5).
2. A split landing gear strut lock mechanism as claimed in claim 1, wherein the rotation stopping means comprises a deflection adjustment pad (9) provided on the upper strut (1) and a rotation stopping boss provided on the lower strut (4), the hinge point of the upper strut (1) and the lower strut (4) being stopped from moving in the direction of the spring tension when the rotation stopping boss is in contact with the deflection adjustment pad (9).
3. The separated landing gear stay bar lock mechanism according to claim 2, wherein the bearing platform of the locking stay bar (1) and the deflection adjusting cushion block (9) are of an integrated structure, and a reserved gap is reserved between the boss and the deflection adjusting cushion block (9) when the separated landing gear stay bar lock mechanism is in the structure locking state.
4. A split landing gear stay lock mechanism according to claim 1, wherein the lower lock stay (4) is tapered from one end of the hinged main stay (7) to the other; one end of the lower locking stay bar (4) is hinged with an unlocking rocker arm (2) to form a double-lug structure (41), the unlocking rocker arm (2) is arranged between the double-lug structure (41), the length (44) of the double-lug structure (41) is larger than one half of the length of the unlocking rocker arm (2), and the width (43) of the tail end of the double-lug structure (41) is not lower than 80% of the width of the tail end of the locking stay bar (1).
5. The separated landing gear stay bar lock mechanism according to claim 1, wherein the unlocking actuating cylinder (3) is a hydraulic cylinder, the hydraulic cylinder comprises an oil outlet and an oil inlet, the oil outlet and the oil inlet are hinged on two sides of the outer cylinder, and the oil outlet and the oil inlet can rotate around a hinged position; the unlocking actuating cylinder (3) is internally provided with a spring (16) for resetting, and the automatic mechanical resetting can be realized after pressure relief.
6. A split landing gear strut lock mechanism as claimed in claim 1, wherein the lower lock strut (4) and the upper lock strut (1) are of i-beam construction, and are sized to be co-ordinated and foldable with respect to each other.
7. The separated landing gear stay bar locking mechanism according to claim 1, wherein a connecting shaft (12) is arranged at the hinge joint of the lower locking stay bar (4) and the upper locking stay bar (1), the connecting shaft (12) is hinged with the lower locking stay bar (4) and the upper locking stay bar (1), the connecting shaft is provided with a double-channel lubricating oil way, and an oil inlet of the lubricating oil way is sealed by a blocking cover (13).
8. The separate landing gear stay bar lock mechanism according to claim 1, wherein a joint bearing is arranged at the joint of the locking stay bar (1) and the support column (8), and the joint bearing has an omnibearing rotation freedom degree and can adapt to micro motion generated in the retraction process of the landing gear.
9. A split landing gear stay lock mechanism according to claim 1, wherein there are two springs (5) symmetrically arranged on either side of the lower lock stay (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111102670.0A CN113753224B (en) | 2021-09-21 | 2021-09-21 | Separated landing gear stay bar lock mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111102670.0A CN113753224B (en) | 2021-09-21 | 2021-09-21 | Separated landing gear stay bar lock mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113753224A CN113753224A (en) | 2021-12-07 |
| CN113753224B true CN113753224B (en) | 2023-07-21 |
Family
ID=78796550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111102670.0A Active CN113753224B (en) | 2021-09-21 | 2021-09-21 | Separated landing gear stay bar lock mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113753224B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB556550A (en) * | 1941-12-01 | 1943-10-11 | Automotive Prod Co Ltd | Improvements in or relating to retractable undercarriages for aircraft |
| US6131852A (en) * | 1998-02-18 | 2000-10-17 | British Aerospace Public Limited Company | Aircraft undercarriage locking system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3069993B1 (en) * | 2015-03-20 | 2017-09-06 | Safran Landing Systems UK Limited | Aircraft landing gear assembly |
| CN205418077U (en) * | 2016-01-13 | 2016-08-03 | 哈尔滨飞机工业集团有限责任公司 | Maintain the body that locks of undercarriage down lock |
| CN205668639U (en) * | 2016-06-12 | 2016-11-02 | 广州市司派克航空器材有限公司 | Full-automatic alighting carriage spring Mechanical course let-down system |
| FR3077557B1 (en) * | 2018-02-02 | 2020-02-28 | Safran Landing Systems | LIGHT COUNTERFEIT LANDER |
| CN109774922B (en) * | 2019-01-22 | 2022-01-18 | 南京航空航天大学 | Main land playing device of variable grounding point |
| CN112623198B (en) * | 2020-12-29 | 2023-03-24 | 中国航空工业集团公司西安飞机设计研究所 | Lifting type undercarriage lower lock |
-
2021
- 2021-09-21 CN CN202111102670.0A patent/CN113753224B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB556550A (en) * | 1941-12-01 | 1943-10-11 | Automotive Prod Co Ltd | Improvements in or relating to retractable undercarriages for aircraft |
| US6131852A (en) * | 1998-02-18 | 2000-10-17 | British Aerospace Public Limited Company | Aircraft undercarriage locking system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113753224A (en) | 2021-12-07 |
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