A foldable blocking hook mechanism
By designing a foldable arresting hook mechanism and using a four-bar linkage and guide pin to control the movement of the arresting hook, the problem of the limited length of the arresting hook for stealth carrier-based aircraft was solved, achieving a longer arresting hook length and improved arresting effect, thus reducing the risk of landing.
Patent Information
- Application Number
- CN202111280292.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-11-01
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2041-11-01
AI Technical Summary
Due to the length limitation of the arresting hook mechanism, stealth carrier-based aircraft face increased arresting hook drag angle, resulting in increased impact load and rebound, thus increasing the risk of landing.
Design a foldable barrier hook mechanism that uses a four-bar linkage to fold the barrier hook rocker arm, and uses a guide pin and damper to control the movement of the barrier hook, thereby increasing the length of the barrier hook and improving the barrier effect.
Achieving a longer arresting hook length within a limited arresting hook bay improves arresting effectiveness, reduces impact load and rebound, and enhances landing safety.
Smart Images
Figure CN116062159B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of arresting gear for carrier-based aircraft, in particular to the arresting gear mechanism for stealth carrier-based aircraft. BACKGROUND
[0002] The arresting gear cooperates with the carrier or ground arresting gear to stop the aircraft within tens or hundreds of meters, which is a braking effect that cannot be achieved by any other brake on the aircraft. The arresting gear mechanism plays a crucial role in the safety of the aircraft landing on the carrier. The design of the arresting gear mechanism for stealth aircraft is more difficult. In order to balance the stealth performance, the arresting gear must be stored in the arresting gear compartment at the tail of the aircraft, and the length of the arresting gear is greatly limited. The reduction of the length of the arresting gear will increase the drag angle of the arresting gear, which will increase the impact load and rebound of the arresting gear during arresting, thereby increasing the risk of landing on the carrier. SUMMARY
[0003] In view of the above problems of the built-in arresting gear of the stealth carrier-based aircraft and the limited length, the purpose of the present application is to design an arresting gear mechanism with folding function, which can obtain a longer length of the arresting gear in the limited arresting gear compartment through the folding of the arresting gear rocker arm, thereby improving the arresting effect.
[0004] The technical solution of the present application is as follows:
[0005] A foldable arresting gear mechanism, comprising an arresting gear support 1, a damper support 2, a large connecting rod support 3, a front rocker arm 4, a rear rocker arm 5, a small connecting rod 6, a large connecting rod 7, a guide pin 9, a longitudinal damper 10, a transverse damper 11, an upper lock 12, a compression spring 8, a torsional spring 20, and a linkage hatch 13. The mechanism can complete the functions of unlocking, hooking, pressing down, longitudinal buffering, and transverse buffering on the aircraft. The arresting gear support 1, the damper support 2, the large connecting rod support 3, and the upper lock 12 are fixed to the aircraft structure. The arresting gear support 1, the front rocker arm 4, the small connecting rod 6, the large connecting rod 7, and the large connecting rod support are hinged to form a four-bar mechanism, which realizes the folding and unfolding of the arresting gear mechanism. The arresting gear support 1 and the large connecting rod support bracket are fixed rods, the front rocker arm 4 is a driving rod driven by the longitudinal damper 10, and the initial position of the axis of the front rocker arm 4 is parallel to the heading. The relative position of the four-bar mechanism allows the small connecting rod 6 to rotate counterclockwise by about 180° when the front rocker arm 4 rotates clockwise by less than 90 degrees.
[0006] Further, the left and right positions of the guide pin shaft 9 control the connection relationship between the small connecting rod 6, the front rocker arm 4 and the rear rocker arm 5 to adapt to the movement state of the arresting hook mechanism; when the arresting hook mechanism is in the locking state or the hook releasing process, the guide pin shaft 9 is inserted into the small connecting rod positioning hole 17 and the rear rocker arm left positioning hole 18, at this time the guide pin shaft 9 is located on the left side; the right side of the guide pin shaft 9 slides on the limiting disc 16 of the front rocker arm 4, the small connecting rod 6 and the rear rocker arm 5 are in a fixed connection state, and the two are in a hinged state with the front rocker arm 4; when the arresting hook mechanism is in the downward pressing state or the longitudinal and lateral buffering process, the guide pin shaft 9 moves to the right under the action of the spring force, and is separated from the small connecting rod positioning hole 17 and inserted into the front rocker arm positioning hole 14, at this time the guide pin shaft 9 is located on the right side; the front rocker arm 4 and the rear rocker arm 5 become a fixed connection state, and the two become a hinged state with the small connecting rod 6.
[0007] Further, the change of the position of the guide pin shaft 9 is replaced by a hydraulic or electromagnetic active driving mode instead of the compression spring 8; at the same time, in order to reduce the friction force when the guide pin shaft 9 is separated from the small connecting rod positioning hole 17, a linear bearing is installed inside the small connecting rod positioning hole 17 and the left positioning hole of the rear rocker arm 5.
[0008] Further, a limiting block 15 is arranged on the right side of the front rocker arm 4, which is used to limit the rotation angle of the rear rocker arm 5 relative to the front rocker arm 4 between 0° and 180°; when 0°, the arresting hook mechanism is in the folding and locking state; when 180°, the arresting hook mechanism is in the downward pressing state or the longitudinal and lateral buffering process; in addition, when 180°, the rear rocker arm 5 stops rotating relative to the front rocker arm 4, and the guide pin shaft 9 just moves to the right and is inserted into the front rocker arm positioning hole 14.
[0009] Further, an elastic device is arranged near the hinge between the large connecting rod 7 and the small connecting rod 6, which is used to make the small connecting rod 6 have a counterclockwise rotation trend relative to the large connecting rod 7, and the elastic device is a torsional spring 20 or a tension spring.
[0010] Further, one side of the rear rocker arm 5 is fixedly connected with a linkage cabin door 13, and the linkage cabin door 13 rotates with the rotation of the rear rocker arm 5.
[0011] Further, the front rocker arm 4 rotates clockwise by 60°, and the small connecting rod 6 can rotate counterclockwise by 180°.
[0012] The beneficial effects of the present application compared with the prior art are as follows:
[0013] (1) The arresting hook mechanism folds the arresting hook rocker arm, so that a longer arresting hook length is obtained in the limited arresting hook cabin, thereby improving the arresting effect.
[0014] (2) The arresting hook mechanism moves the installation position of the arresting hook backward, increases the installation distance from the main wing of the airplane, and further improves the arresting effect.
[0015] (3) The cabin door of the arresting hook mechanism is a linkage cabin door, which does not need to be designed with a cabin door mechanism, is fixedly connected with the rear rocker arm, does not affect the arresting, and is simple and reliable in structure. BRIEF DESCRIPTION OF DRAWINGS
[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is readily apparent to one skilled in the art that the following figures are only some embodiments of the application, and other figures can be obtained from these figures without creative labor.
[0017] Figure 1 The folding arresting hook mechanism operating flow provided by the specific embodiment of the application is shown, and steps 1, 2, 3 and 4 in the figure respectively represent the unlocking, hook releasing, downward pressing and longitudinal and lateral buffering processes of the arresting hook system when the aircraft is landing.
[0018] Figure 2 The assembly schematic diagram of the folding arresting hook mechanism provided by the specific embodiment of the application is shown.
[0019] Figure 3 The position change of the guide pin shaft of the arresting hook system in the unlocking, hook releasing, downward pressing and longitudinal and lateral buffering processes provided by the specific embodiment of the application is shown.
[0020] Figure 4 The schematic diagram of the three-axis collinearity of the large connecting rod 7, the small connecting rod and the front rocker arm in the hook releasing process provided by the specific embodiment of the application is shown.
[0021] In the above drawings, the following reference signs are included:
[0022] 1, arresting hook support; 2, damper support; 3, large connecting rod support; 4, front rocker arm; 5, rear rocker arm; 6, small connecting rod; 7, large connecting rod; 8, compression spring; 9, guide pin shaft; 10, longitudinal damper; 11, lateral damper; 12, upper lock; 13, linkage cabin door; 14, front rocker arm positioning hole; 15, limiting block; 16, limiting disc; 17, small connecting rod positioning hole; 18, left rear rocker arm positioning hole; 19, right rear rocker arm positioning hole; 20, torsion spring. DETAILED DESCRIPTION
[0023] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other in the case of no conflict. The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one example embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0024] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component and / or combinations thereof.
[0025] Unless specifically stated otherwise, the relative arrangement of the components and steps illustrated in these embodiments do not limit the scope of the present application. At the same time, it should be understood that the size of each part shown in the drawings is not drawn in accordance with the actual proportion relationship. The technology, methods and devices known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the technology, methods and devices should be considered as part of the authorized specification. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0026] A foldable blocking hook mechanism of the present application includes blocking hook support 1, damper support 2, large connecting rod support 3, front rocker arm 4, rear rocker arm 5, small connecting rod 6, large connecting rod 7, guide pin 9, longitudinal damper 10, transverse damper 11, upper lock 12, compression spring 8, torsion spring 20, linkage hatch 13 and other components. The assembly schematic diagram is shown in Figure 2 The mechanism can complete the functions of opening (locking), releasing the hook, pressing down, longitudinal buffering, transverse buffering and the like on the machine. All the supports and upper lock 12 are fixed on the machine structure.
[0027] The folding and unfolding of the arresting hook mechanism can be realized by the movement of the four-bar linkage. The arresting hook support 1, the front rocker arm 4, the small connecting rod 6, the large connecting rod 7, and the large connecting rod support 3 are hingedly connected, forming a four-bar linkage. The arresting hook support 1 and the large connecting rod support 3 can be considered as a fixed rod, and the front rocker arm 4 is a driving rod driven by the longitudinal damper 10. The initial position of the axis of the front rocker arm 4 is parallel to the heading. The relative position of the four-bar linkage can make the small connecting rod 6 rotate counterclockwise by about 180° when the front rocker arm 4 rotates clockwise by less than 90°. In this invention, the front rocker arm 4 rotates clockwise by 60°, and the small connecting rod 6 rotates counterclockwise by 180°.
[0028] The left and right positions of the guide pin shaft 9 control the connection relationship between the small connecting rod 6, the front rocker arm, and the rear rocker arm 5, thereby adapting to the movement state of the arresting hook mechanism. When the arresting hook mechanism is in the locked state or the hook releasing process, the guide pin shaft 9 is inserted into the small connecting rod positioning hole 17 and the rear rocker arm left positioning hole 18 (at this time, the guide pin shaft 9 is located on the left side), and the right side of the guide pin shaft 9 slides on the limiting disc 16 of the front rocker arm. The small connecting rod 6 and the rear rocker arm 5 are in a fixed connection state, and the two are hingedly connected with the front rocker arm 4. When the arresting hook mechanism is in the downward pressing state or the longitudinal and lateral buffering process, the guide pin shaft 9 moves to the right under the action of the spring force, slides along the rear rocker arm left positioning hole 18 and the rear rocker arm right positioning hole 19 after leaving the small connecting rod positioning hole 17, and finally is inserted into the front rocker arm positioning hole 14 (at this time, the guide pin shaft 9 is located on the right side). The front rocker arm 4 and the rear rocker arm 5 become a fixed connection state, and the two become a hinged connection with the small connecting rod 6. The change in the position of the guide pin shaft 9 can be replaced by active driving methods such as hydraulic or electromagnetic. At the same time, in order to reduce the friction force when the guide pin shaft 9 leaves the small connecting rod positioning hole 17, a linear bearing can be installed inside the small connecting rod positioning hole 17 and the rear rocker arm 5 left positioning hole.
[0029] A limiting block 15 is provided on the upper right side of the front rocker arm, which is used to limit the rotation angle of the rear rocker arm 5 relative to the front rocker arm between 0° and 180°. When 0°, the arresting hook mechanism is in the folded and locked state; when 180°, the arresting hook mechanism is in the downward pressing state or the longitudinal and lateral buffering process. In addition, when 180°, the rear rocker arm 5 stops rotating relative to the front rocker arm, and the guide pin shaft 9 moves to the right and is inserted into the front rocker arm positioning hole 14.
[0030] A elastic device is installed near the hinge between the large connecting rod 7 and the small connecting rod 6, which makes the small connecting rod 6 have a tendency to rotate counterclockwise relative to the large connecting rod 7. The elastic device can be replaced by a torsional spring 20 or a tension spring.
[0031] One side of the rear rocker arm 5 is fixedly connected with the linkage cabin door 13, and the linkage cabin door 13 rotates with the rotation of the rear rocker arm 5.
[0032] Generally, the arresting hook mechanism needs to have seven functions, i.e. unlocking, hook releasing, downward pressing, longitudinal buffering, transverse buffering, hook retracting and locking. Before the aircraft lands, the arresting hook mechanism needs to complete the unlocking, hook releasing and downward pressing operations; during the landing, the arresting hook mechanism needs to complete the longitudinal buffering and transverse buffering operations; after the landing, the arresting hook mechanism needs to complete the hook retracting and locking operations. In the present application, the hook retracting operation is completed by the ground personnel, and after the hook retracting operation is completed (the rocker arm 2 is in position), the on-position lock 12 is controlled to be locked by the on-board personnel or the ground personnel. The hook retracting and locking operations are not described herein. The unlocking, hook releasing, downward pressing, longitudinal buffering and transverse buffering operation processes are shown in Figure 1 .
[0033] Before the on-position lock 12 is unlocked, the front and rear rocker arms 4 and 5 are in the folded state, the axes are collinear, the included angle is 0°, and the arresting hook mechanism is in the folded state. The on-position lock 12 is unlocked by the on-board hydraulic pressure or electromagnetic force, and then the internal longitudinal damper 10 pushes the front rocker arm 4 to rotate clockwise around the arresting hook support 1 to release the hook under the control of the air pressure or hydraulic pressure. During the hook releasing process, the small connecting rod 6 and the rear rocker arm 5 are fixedly connected through the guide pin shaft 9 penetrating the small connecting rod limiting hole 17 and the rear rocker arm 5 left limiting hole 18, as shown in Figure 3 . With the rotation of the rocker arm 4, the small connecting rod 6 drives the rear rocker arm 5 to rotate counterclockwise around the hinge point of the front rocker arm 4, and at the same time, the linkage cabin door 13 moves with the rear rocker arm 5, and the cabin door is opened. In addition, during the hook releasing process, at a certain position, the small connecting rod 6, the large connecting rod 7 and the front rocker arm 4 axes are collinear, as shown in Figure 4 . At this time, under the action of the torsional spring 20 force and the gravity of the rear rocker arm 5, the small connecting rod 6 still has a counterclockwise rotation trend relative to the large connecting rod 7, so that the rear rocker arm 5 continues to rotate counterclockwise around the front rocker arm 4.
[0034] Under the drive of the longitudinal damper 10, when the small connecting rod 6 and the rear rocker arm 5 rotate counterclockwise by 180 degrees relative to the front rocker arm 1, the rear rocker arm 5 is blocked by the limiting block 15 on the front rocker arm and cannot continue to rotate, and the arresting hook mechanism is in the unfolded state. At the same time, the guide pin shaft 9 is aligned with the front rocker arm limiting hole 14, and under the action of the compression spring 8 force, the guide pin shaft 9 moves to the right and is inserted into the limiting hole 14 on the front rocker arm 4, so that the front rocker arm 4 and the rear rocker arm 5 are fixedly connected and collinear, and at the same time, the fixed connection between the small connecting rod 6 and the rear rocker arm 5 is disconnected, and the connection relationship between the two is changed to hinged, as shown in Figure 3 . In the very short time thereafter, the longitudinal damper 10 is pressed to the lower limit, the arresting hook mechanism is pressed downward, the rotation is stopped, and the aircraft is ready for landing.
[0035] At the moment of touching the ship, the rear rocker arm 5 drives the front rocker arm 4 to rebound upward, the impact shear force is borne by the hinge shafts and the guide pin shaft 9 of the rear rocker arm 5 and the front rocker arm 4, the small connecting rod 6 has become hinged with the rear rocker arm 5, and the small connecting rod 6 and the large connecting rod 7 rotate with the rotation of the front and rear rocker arms 5 and 6 and do not bear the load load. The longitudinal damper 10 performs longitudinal buffering to reduce the rebound height and bounce distance of the arresting hook; the transverse damper 11 performs transverse buffering to reduce the left and right swing amplitude of the rear rocker arm 5.
Claims
1. A foldable arresting hook mechanism, characterized in that: The invention comprises an arresting hook support (1), a damper support (2), a large connecting rod support (3), a front rocker arm (4), a rear rocker arm (5), a small connecting rod (6), a large connecting rod (7), a guide pin shaft (9), a longitudinal damper (10), a transverse damper (11), an upper lock (12), a compression spring (8), a torsion spring (20), and a linkage door (13); the mechanism can complete the functions of unlocking, hook release, downward pressing, longitudinal buffering, and transverse buffering on the aircraft; the arresting hook support (1), the damper support (2), the large connecting rod support (3) and the upper lock (12) are fixed on the aircraft body structure; the arresting hook support (1) and The front rocker arm (4), the front rocker arm (4) and the small connecting rod (6), the small connecting rod (6) and the large connecting rod (7), and the large connecting rod (7) and the large connecting rod support are hinged to form a four-bar mechanism, and the folding and unfolding of the arresting hook mechanism is realized by the four-bar mechanism; wherein the arresting hook support (1) and the large connecting rod support bracket are fixed rods, the front rocker arm (4) is driven by the longitudinal damper (10), and is a driving rod, the initial position of the axis of the front rocker arm (4) is parallel to the heading, and the relative position of the four-bar mechanism is such that when the front rocker arm (4) rotates clockwise by an angle less than 90 degrees, the small connecting rod (6) can rotate counterclockwise about 180 degrees; The left and right positions of the guide pin (9) are used to control the connection relationship between the small connecting rod (6), the front rocker arm (4), and the rear rocker arm (5) so as to adapt to the motion state of the arresting hook; when the arresting hook is in the locked state or in the process of releasing the hook, the guide pin (9) is inserted into the small connecting rod positioning hole (17) and the left positioning hole (18) of the rear rocker arm, and the guide pin (9) is located on the left side; the right side of the guide pin (9) slides relatively on the limit plate (16) of the front rocker arm (4), and the small connecting rod (6) is moved to the left side. ) and the rear rocker arm (5) are in a fixed connection state, and the two are in an articulated state with the front rocker arm (4); when the arresting hook is in a downward pressing state or in the longitudinal and transverse buffering process, the guide pin shaft (9) moves to the right under the action of the spring force, disengages from the small connecting rod positioning hole (17) and inserts into the front rocker arm positioning hole (14), and at this time the guide pin shaft (9) is located on the right side; the front rocker arm (4) and the rear rocker arm (5) become a fixed connection state, and the two become articulated with the small connecting rod (6).
2. A foldable arresting hook mechanism according to claim 1, characterized in that: The change of the position of the guide pin shaft (9) is replaced by a hydraulic or electromagnetic active drive mode instead of a compression spring (8); at the same time, in order to reduce the friction force when the guide pin shaft (9) is separated from the small connecting rod positioning hole (17), a linear bearing is installed inside the small connecting rod positioning hole (17) and the left positioning of the rear rocker arm (5).
3. The foldable arresting hook mechanism according to claim 1, characterized in that: A limit block (15) is provided on the right rocker arm of the front rocker arm (4) for limiting the rotation angle of the rear rocker arm (5) relative to the front rocker arm (4) between 0° and 180°; at 0°, the arresting hook mechanism is in a retracted and locked state; at 180°, the arresting hook mechanism is in a downward pressing state or in the longitudinal and transverse buffering process; in addition, at 180°, the rear rocker arm (5) stops rotating relative to the front rocker arm (4), and the guide pin shaft (9) just moves to the right and is inserted into the front rocker arm positioning hole (14).
4. The foldable arresting hook mechanism according to claim 1, characterized in that: An elastic device is installed near the hinge between the large connecting rod (7) and the small connecting rod (6) to make the small connecting rod (6) tend to rotate counterclockwise relative to the large connecting rod (7). The elastic device is a torsion spring (20) or a tension spring.
5. The foldable arresting hook mechanism according to claim 1, characterized in that: One side of the rear rocker arm (5) is fixedly connected to the linkage door (13), and the linkage door (13) rotates with the rotation of the rear rocker arm (5).
6. The foldable arresting hook mechanism according to claim 1, characterized in that: The front rocker arm (4) rotates 60° clockwise, and the small connecting rod (6) can rotate 180° counterclockwise around it.
Citation Information
Patent Citations
Unmanned aerial vehicle arresting hook, control method and unmanned aerial vehicle
CN113184174A