A high load bearing connecting rod lock structure
By using a high-load-bearing linkage lock structure and mechanical switching of linkages and springs, the integration and weight issues of aircraft locking mechanisms are solved, achieving compact and efficient hook state switching and correct locking, and reducing manufacturing and assembly requirements.
Patent Information
- Application Number
- CN202411906270.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2044-12-23
AI Technical Summary
Existing aircraft locking mechanisms suffer from low integration, heavy weight, and wasted space. Furthermore, hook locking mechanisms have high requirements for the manufacturing and assembly of the locked structure and are difficult to adapt to changes in positional tolerances during movement.
It adopts a high load-bearing linkage lock structure, which realizes the locking and unlocking of the lock hook through mechanical means. The state switching of the lock hook is realized by the cooperation of the linkage mechanism and spring. No additional energy is required. Combined with the guide and limit structure, it ensures the correct locking of the lock ring.
It achieves a compact and highly integrated lock structure with light weight, enabling mechanical locking and unlocking without the need for additional energy, and correcting the movement trajectory of the locked structure to ensure that the lock ring locks correctly.
Smart Images
Figure CN119466462B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of aircraft structure design, and particularly relates to a high-load-bearing connecting rod lock structure. BACKGROUND
[0002] The lock mechanism on an aircraft generally adopts hydraulic unlocking under normal circumstances, and unlocking is achieved by a hydraulic actuating cylinder to unlock the lock mechanism. The upper lock of this form needs to integrate an independent unlocking actuating cylinder in the lock body structure, and also needs to refer to the energy system on the aircraft and arrange corresponding pipelines, which has the problems of large weight and space waste caused by low integration.
[0003] In order to ensure the load-bearing capacity of the lock hook, the general hook lock mechanism generally has a relatively strict tolerance requirement for the falling lock position of the locked structure on the lock hook, so that the manufacturing and assembly requirements of the locked structure are relatively high, and the locked structure with a position tolerance that is difficult to guarantee during movement is generally difficult to apply. SUMMARY
[0004] In order to solve the above problems, the application provides a high-load-bearing connecting rod lock structure, mainly comprising a lock body front clamping plate, a lock body rear clamping plate, a crank rocker arm, a connecting rod and a lock hook.
[0005] The lock body front clamping plate and the lock body rear clamping plate are connected through a connecting shaft, and a crank rotating shaft and a lock hook rotating shaft are further rotationally arranged between the lock body front clamping plate and the lock body rear clamping plate, the crank rotating shaft is fixed with the crank rocker arm, the lock hook rotating shaft is fixed with the lock hook, the crank rocker arm is provided with a first rocker arm, a second rocker arm and a third rocker arm, the first rocker arm is hinged to the lock hook, the second rocker arm is provided with a second spring shaft, the second spring shaft is connected with a first spring shaft arranged between the lock body front clamping plate and the lock body rear clamping plate through a spring, and the third rocker arm is connected with an external load.
[0006] The first spring shaft and the second spring shaft are respectively located on the two sides of the crank rotating shaft, the lock hook is pushed to rotate through the crank rocker arm to switch the connecting rod lock structure between an unlocking state and a locking state, in the unlocking state, the second spring shaft is located below a line connecting the first spring shaft and the crank rotating shaft, and in the locking state, the second spring shaft is located above the line connecting the first spring shaft and the crank rotating shaft.
[0007] Preferably, the lock body front clamping plate and / or the lock body rear clamping plate is provided with a guide at the bottom, the guide has a U-shaped groove for adapting and accommodating a lock ring, and when the lock ring moves into the U-shaped groove, the lock hook can enter the lock ring in the locking state.
[0008] Preferably, the first rocker arm is connected with the lock hook through a connecting rod, the first rocker arm is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the lock hook.
[0009] Preferably, the first swing arm is provided with a first stop pin, the connecting rod is provided with a second stop pin, during the locking process, the first stop pin is close to the second stop pin, and in the locked state, the first stop pin is in abutment with the second stop pin.
[0010] Preferably, the first stop pin is threadedly connected with the first swing arm, and the second stop pin is threadedly connected with the connecting rod.
[0011] Preferably, the third swing arm is provided with a stop boss, and a limiting shaft is arranged between the front clamping plate and the rear clamping plate of the lock body, during the unlocking process, the stop boss is close to the limiting shaft, and in the unlocked state, the stop boss is in abutment with the limiting shaft.
[0012] The present application has the advantages of compact structure, high integration, light weight, and mechanical locking and unlocking without additional energy. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 is a structural schematic diagram of a preferred embodiment of the high-load-bearing connecting rod lock structure of the present application.
[0014] Figure 2 is a structural schematic diagram of the unlocked state of the embodiment shown in the present application. Figure 1
[0015] Figure 3 is a structural schematic diagram of the locked state of the embodiment shown in the present application. Figure 1
[0016] In the drawings: 1 - front clamping plate of lock body, 2 - rear clamping plate of lock body, 3 - first spring shaft, 4 - spring, 5 - limiting shaft, 6 - crank swing arm, 6a - first swing arm, 6b - second swing arm, 6c - third swing arm, 7 - second spring shaft, 8 - crank pivot, 9 - connecting rod, 10 - lock hook, 11 - guide, 12 - lock hook pivot, 13 - connecting shaft, 14 - first stop pin, 15 - second stop pin, 16 - stop boss. DETAILED DESCRIPTION
[0017] In order to make the purposes, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, identical or similar labels represent identical or similar elements or elements with identical or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.
[0018] The present application provides a high-load connecting rod lock structure, as shown in Figures 1-3 The present application provides a high-load connecting rod lock structure, as shown in
[0019] The front lock body clamping plate 1 and the rear lock body clamping plate 2 are connected by a connecting shaft 13, and a crank shaft 8 and a lock hook shaft 12 are rotatably arranged between the front lock body clamping plate 1 and the rear lock body clamping plate 2. The crank shaft 8 is fixed with a crank rocker arm 6, and the lock hook shaft 12 is fixed with a lock hook 10. The crank rocker arm 6 is provided with a first rocker arm 6a, a second rocker arm 6b and a third rocker arm 6c. The first rocker arm 6a is hinged to the lock hook 10. The second rocker arm 6b is provided with a second spring shaft 7, and the second spring shaft 7 is connected with a first spring shaft 3 arranged between the front lock body clamping plate 1 and the rear lock body clamping plate 2 through a spring 4. The third rocker arm 6c is connected with an external load.
[0020] The first spring shaft 3 and the second spring shaft 7 are respectively located on both sides of the crank shaft 8. The lock hook 10 is pushed to rotate by the crank rocker arm 6 to switch the connecting rod lock structure between an unlocking state and a locking state. In the unlocking state, the second spring shaft 7 is located below the line connecting the first spring shaft 3 and the crank shaft 8. In the locking state, the second spring shaft 7 is located above the line connecting the first spring shaft 3 and the crank shaft 8.
[0021] In this embodiment, a mechanical unlocking interface is arranged on the third rocker arm 6c to connect an external unlocking or locking load. The locking process refers to switching from the unlocking state to the locking state. This process requires a load to be applied to the third rocker arm 6c to drive the crank rocker arm 6 to rotate counterclockwise around the crank shaft 8. First, refer to Figure 2When the lock is in the unlocked state, the spring 4 is above the crank pivot 8 (the specific connection point of the spring 4 is not shown in the figure, in fact, the two ends of the spring 4 are respectively on the first spring shaft 3 and the second spring shaft 7), the spring 4 is in a stretched state, and when the crank rocker arm 6 rotates counterclockwise around the crank pivot 8, the spring 4 needs to be overcome first, and the lock hook 10 needs to be pushed to rotate clockwise, when the spring 4 passes through the crank pivot 8, the spring 4 starts to assist, pulls the crank rocker arm 6 to rotate counterclockwise around the crank pivot 8, and helps the lock hook 10 to continue to rotate clockwise, so as to realize the locking. The state after locking is shown in Figure 3 .
[0022] Conversely, the unlocking process refers to switching from the locked state to the unlocked state, which needs to load the third rocker arm 6c to drive the crank rocker arm 6 to rotate clockwise around the crank pivot 8, first referring to Figure 3 the locked state, at this time, the spring 4 is below the crank pivot 8, and the spring 4 is in a stretched state, and when the crank rocker arm 6 rotates clockwise around the crank pivot 8, the spring 4 needs to be overcome first, and the lock hook 10 needs to be pushed to rotate counterclockwise, when the spring 4 passes through the crank pivot 8, the spring 4 starts to assist, pulls the crank rocker arm 6 to rotate clockwise around the crank pivot 8, and helps the lock hook 10 to continue to rotate counterclockwise, so as to realize the unlocking. The state after unlocking is shown in Figure 2 .
[0023] In the initial stage of the locking process or the unlocking process of the present application, the spring force of the spring 4 is a resistance, and when the spring 4 passes through the crank pivot 8, the force of the spring 4 becomes an assistance to help locking or unlocking. The present application can realize mechanical locking and unlocking without increasing energy, and realizes a larger carrying capacity of the lock structure through the self-locking principle of the connecting rod mechanism.
[0024] In some optional embodiments, the lock body front clamping plate 1 and / or the lock body rear clamping plate 2 is provided with a guide 11 at the bottom, and the guide 11 has a U-shaped groove for adapting to accommodate a lock ring. When the lock ring moves into the U-shaped groove, the lock hook 10 can enter the lock ring in the locked state.
[0025] Referring to Figures 1-3 , the guide 11 is fixed on at least one clamping plate by bolts. The guide 11 is provided with a U-shaped groove, and the U-shaped groove is matched with the final required lock hook locking point position, such as the A position shown in Figure 3 , and the U-shaped groove can realize the limiting function of the lock ring during the movement of the lock ring.
[0026] Based on this embodiment, the present application can correct the movement trajectory of the locked part to a certain extent, and ensure that the lock ring is correctly locked on the lock hook.
[0027] In some alternative embodiments, the first rocker arm 6a is connected to the locking hook 10 via a connecting rod 9, with one end of the first rocker arm 6a hinged to the connecting rod 9 and the other end of the connecting rod 9 hinged to the locking hook 10.
[0028] In some alternative embodiments, a first stop pin 14 is provided on the first rocker arm 6a, and a second stop pin 15 is provided on the connecting rod 9. When the connecting rod lock structure is locked, the first stop pin 14 approaches the second stop pin 15, and in the locked state, the first stop pin 14 abuts against the second stop pin 15.
[0029] This application uses the first stop pin 14 and the second stop pin 15 to achieve the limiting position at the maximum locking angle, as shown in the reference. Figure 2 and Figure 3 When the first stop pin 14 of the first rocker arm 6a and the second stop pin 15 on the connecting rod 9 come into contact, the first rocker arm 6a and the connecting rod 9 form a locking deflection. At this time, the spring 4 maintains the locking deflection of the locking mechanism, and the lock hook 10 remains in a locked stable state.
[0030] In some alternative embodiments, the first stop pin 14 is threaded to the first rocker arm 6a, and the second stop pin 15 is threaded to the connecting rod 9.
[0031] In some alternative embodiments, a stop boss 16 is provided on the third rocker arm 6c, and a limit shaft 5 is provided between the front clamping plate 1 and the rear clamping plate 2 of the lock body. When the linkage lock structure is in the unlocking process, the stop boss 16 approaches the limit shaft 5, and in the unlocked state, the stop boss 16 abuts against the limit shaft 5.
[0032] This application achieves the limiting of the maximum displacement at the unlocking angle through the stop boss 16 and the limiting shaft 5. (Refer to...) Figure 2 and Figure 3 The unlocking process ends when the stop boss 16 on the third rocker arm 6c contacts the limit shaft 5.
[0033] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A high load bearing connecting rod lock structure, characterized by, The lock body front clamping plate (1), the lock body rear clamping plate (2), the crank rocker arm (6), the connecting rod (9), and the lock hook (10) are included. The lock body front clamping plate (1) and the lock body rear clamping plate (2) are connected through the connecting shaft (13), and the crank rotating shaft (8) and the lock hook rotating shaft (12) are rotatably arranged between the lock body front clamping plate (1) and the lock body rear clamping plate (2). The crank rocker arm (6) is fixed on the crank rotating shaft (8), the lock hook (10) is fixed on the lock hook rotating shaft (12), the first rocker arm (6a), the second rocker arm (6b), and the third rocker arm (6c) are arranged on the crank rocker arm (6), the first rocker arm (6a) is hinged on the lock hook (10), the second spring shaft (7) is arranged on the second rocker arm (6b), the second spring shaft (7) and the first spring shaft (3) arranged between the lock body front clamping plate (1) and the lock body rear clamping plate (2) are connected through the spring (4), and the third rocker arm (6c) is connected to an external load. The first spring shaft (3) and the second spring shaft (7) are respectively located on the two sides of the crank rotating shaft (8), the lock hook (10) is pushed to rotate through the crank rocker arm (6) to switch the connecting rod lock structure between the unlocking state and the locking state, in the unlocking state, the second spring shaft (7) is located below the line connecting the first spring shaft (3) and the crank rotating shaft (8), and in the locking state, the second spring shaft (7) is located above the line connecting the first spring shaft (3) and the crank rotating shaft (8).
2. The high load capacity link lock structure of claim 1, wherein, The lock body front clamping plate (1) and / or the lock body rear clamping plate (2) are provided with a guide (11) at the bottom, the guide (11) has a U-shaped groove for adapting to accommodate a lock ring, when the lock ring moves into the U-shaped groove, the lock hook (10) can enter the lock ring in the locking state.
3. The high load capacity link lock structure of claim 2, wherein, The first rocker arm (6a) is connected to the lock hook (10) through the connecting rod (9), the first rocker arm (6a) is hinged to one end of the connecting rod (9), and the other end of the connecting rod (9) is hinged to the lock hook (10).
4. The high load capacity link lock structure of claim 3, wherein, The first rocker arm (6a) is provided with a first stop pin (14), the connecting rod (9) is provided with a second stop pin (15), in the locking process of the connecting rod lock structure, the first stop pin (14) is close to the second stop pin (15), and in the locking state, the first stop pin (14) is in abutment with the second stop pin (15).
5. The high load capacity link lock structure of claim 4, wherein, The first stop pin (14) is threadedly connected with the first rocker arm (6a), and the second stop pin (15) is threadedly connected with the connecting rod (9).
6. The high load capacity link lock structure of claim 1, wherein, The third rocker arm (6c) is provided with a stop boss (16), a limiting shaft (5) is arranged between the lock body front clamping plate (1) and the lock body rear clamping plate (2), in the unlocking process of the connecting rod lock structure, the stop boss (16) is close to the limiting shaft (5), and in the unlocking state, the stop boss (16) is in abutment with the limiting shaft (5).
Citation Information
Patent Citations
Semi-active cabin door uplock
CN112373671A
Safe locking mechanism of aircraft cabin door lock mechanism
CN115573631A