A blocking hook centering device

Abstract

The application provides a kind of blocking hook centering device, which comprises: fuselage support pivot, longitudinal rotating joint, blocking hook straight arm, straight arm connecting assembly, roller assembly and elastomer;The fuselage support pivot is fixed on the fuselage, and the longitudinal rotating joint is hinged to the fuselage support pivot to realize the longitudinal rotation of the blocking hook;The blocking hook straight arm is hinged to the longitudinal rotating joint through the straight arm connecting assembly to realize the lateral rotation of the blocking hook;The side of the longitudinal rotating joint towards the blocking hook straight arm has a U-shaped groove, one end of the roller assembly slides in the U-shaped groove, and the other end is connected with the elastomer;The end of the blocking hook straight arm opposite to the U-shaped groove has a receiving cavity, the other end of the roller assembly and the elastomer are located in the receiving cavity, and the elastomer is in a compressed state. The technical scheme of the application can solve the technical problems of complex structure and low reliability of the blocking hook centering device in the prior art.

Description

Technical Field

[0001] This invention relates to the field of arresting hook technology for carrier-based aircraft, and more particularly to an arresting hook centering device. Background Technology

[0002] The arresting hook, used in conjunction with carrier or ground-based arresting gear, can stop an aircraft over a distance of tens or hundreds of meters by utilizing a pre-set arresting load. This braking effect is unmatched by any other onboard braking system. The arresting hook mechanism plays a crucial role in the safe landing of aircraft. The centering device is a vital component of the arresting hook. It allows the arresting hook arm to deflect laterally within a 20° range relative to its center position, ensuring that the arresting hook's straight rocker arm remains aligned with the ground-based arresting load during eccentric or sideslip landings or carrier landings, preventing the hook arm from experiencing excessive bending moments. Furthermore, the centering device must automatically return the arresting hook arm to its center position after lateral disturbances. Currently, the centering device design of arresting hooks is complex and cannot promptly return to center after lateral disturbances, severely impacting the safety and reliability of the arresting hook. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] This invention provides a centering device for an arresting hook, comprising: a fuselage support shaft, a longitudinal rotating joint, an arresting hook straight arm, a straight arm connecting assembly, a roller assembly, and an elastic body; the fuselage support shaft is fixed to the fuselage body, and the longitudinal rotating joint is hinged to the fuselage support shaft to achieve longitudinal rotation of the arresting hook; the arresting hook straight arm is hinged to the longitudinal rotating joint via the straight arm connecting assembly to achieve lateral rotation of the arresting hook; the longitudinal rotating joint has a U-shaped groove on the side facing the arresting hook straight arm, one end of the roller assembly slides within the U-shaped groove, and the other end is connected to the elastic body; the arresting hook straight arm and the U-shaped groove... One end of the groove has a receiving cavity, and the other end of the roller assembly and the elastic body are located in the receiving cavity, with the elastic body under pressure. When the straight arm of the blocking hook is not subjected to lateral disturbance, the straight arm of the blocking hook and the roller assembly are aligned with the center line of the U-shaped groove and are in a centered state. When the straight arm of the blocking hook is subjected to lateral disturbance, the straight arm of the blocking hook rotates around the straight arm connecting assembly, causing the roller assembly to slide in the U-shaped groove. The roller assembly further compresses the elastic body, and the straight arm of the blocking hook generates a restoring torque. When the lateral disturbance to the straight arm of the blocking hook disappears, the straight arm of the blocking hook, under the action of the restoring torque, drives the roller assembly to return to the centered state.

[0005] Furthermore, the roller assembly includes a roller, a roller shaft, and a roller connecting rod. The roller contacts a U-shaped groove, and the roller is hinged to one end of the roller connecting rod via the roller shaft. The other end of the roller connecting rod is connected to an elastomer.

[0006] Furthermore, the side of the other end of the roller connecting rod contacts the inner wall of the receiving cavity.

[0007] Furthermore, the roller assembly also includes a linear bearing located between the roller connecting rod and the receiving cavity.

[0008] Furthermore, the U-shaped groove limits the lateral deflection angle of the straight arm of the arresting hook relative to the centering state to a range of [-20°, 20°].

[0009] Furthermore, the centering device for the blocking hook also includes two elastic limiting members located inside the port of the U-shaped groove. When the lateral deflection angle of the straight arm of the blocking hook is greater than ±20°, the roller connecting rod collides and contacts the elastic limiting members.

[0010] Furthermore, the straight boom connection assembly includes a straight boom pivot and a nut, the straight boom pivot passing through the longitudinal swivel joint and the arresting hook straight boom, and the nut being connected to the straight boom pivot to fix the straight boom pivot.

[0011] Furthermore, the centering device for the arresting hook also includes a first grinding plate and a second grinding plate. The first grinding plate is embedded in the surface of the longitudinal rotating joint that contacts the straight arm of the arresting hook, and the surface of the first grinding plate is flush with the surface of the longitudinal rotating joint. The second grinding plate is embedded in the surface of the straight arm of the arresting hook that contacts the longitudinal rotating joint, and the first grinding plate and the second grinding plate are in contact.

[0012] Furthermore, the straight arm of the arresting hook includes two lugs, and a longitudinal rotating joint is located between the two lugs. The arresting hook centering device also includes a third grinding plate and a fourth grinding plate. The first grinding plate and the second grinding plate are located between the longitudinal rotating joint and the first lug, and the third grinding plate and the fourth grinding plate are located between the longitudinal rotating joint and the second lug. The third grinding plate is embedded in the surface of the longitudinal rotating joint that contacts the second lug, and the surface of the third grinding plate is flush with the surface of the longitudinal rotating joint. The fourth grinding plate is embedded in the surface of the second lug that contacts the longitudinal rotating joint, and the third grinding plate and the fourth grinding plate are in contact.

[0013] Furthermore, the centering device for the arresting hook also includes multiple pressure regulating components. The first and second lugs have multiple through holes, and the multiple pressure regulating components correspond one-to-one with the multiple through holes. The pressure regulating components are located inside the through holes and connected to the second or fourth grinding plate. The pressure regulating components are used to adjust the pressure between the second and first grinding plates and between the fourth and third grinding plates.

[0014] The present invention provides a centering device for an arresting hook. This device achieves longitudinal and lateral rotation of the arresting hook through a fuselage support shaft, a longitudinal rotating joint, and a straight arm connecting assembly. The U-shaped groove of the longitudinal rotating joint, in cooperation with the roller assembly and the elastic body, generates a restoring torque when the straight arm of the arresting hook is subjected to lateral disturbance, thus causing the straight arm to return to its centered state. The centering device of the present invention has a simple structure, is lightweight, and can reliably restore the arresting hook to its centered state. Compared with the prior art, the technical solution of the present invention can solve the technical problems of complex structure and low reliability of existing arresting hook centering devices. Attached Figure Description

[0015] The accompanying drawings, which form part of this specification, are provided to further illustrate embodiments of the invention and, together with the textual description, explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0016] Figure 1 A schematic diagram of the structure of the arresting hook centering device according to a specific embodiment of the present invention is shown;

[0017] Figure 2 A schematic diagram of the internal structure of the arresting hook centering device provided according to a specific embodiment of the present invention is shown;

[0018] Figure 3 A schematic diagram of a longitudinally symmetrical cross-sectional structure of an arresting hook centering device according to a specific embodiment of the present invention is shown;

[0019] Figure 4 This diagram shows a transversely symmetrical cross-sectional structure of the centering device for the arresting hook in the centering state, according to a specific embodiment of the present invention.

[0020] Figure 5 A schematic diagram of a transversely symmetrical cross-sectional structure of an arresting hook centering device in a 20° transverse deflection state, according to a specific embodiment of the present invention, is shown.

[0021] The above figures include the following reference numerals:

[0022] 1. Machine body support shaft; 2. Longitudinal rotating joint; 3. Barrier hook straight arm; 4. Straight arm shaft; 5. Nut; 6. Roller shaft; 7. Roller; 8. Roller connecting rod; 9. Elastomer; 10. Pressure adjusting component; 11. First grinding disc; 12. Second grinding disc; 13. Third grinding disc; 14. Fourth grinding disc; 15. Elastic limiting component. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0026] like Figures 1 to 5As shown, a specific embodiment of the present invention provides a centering device for an arresting hook, which includes: a fuselage support shaft 1, a longitudinal rotating joint 2, an arresting hook straight arm 3, a straight arm connecting assembly, a roller assembly, and an elastic body 9; the fuselage support shaft 1 is fixed to the fuselage, and the longitudinal rotating joint 2 is hinged to the fuselage support shaft 1 to realize the longitudinal rotation of the arresting hook; the arresting hook straight arm 3 is hinged to the longitudinal rotating joint 2 through the straight arm connecting assembly to realize the lateral rotation of the arresting hook; the longitudinal rotating joint 2 has a U-shaped groove on the side facing the arresting hook straight arm 3, one end of the roller assembly slides in the U-shaped groove, and the other end is connected to the elastic body 9; the arresting hook... The straight arm 3 has a receiving cavity at one end opposite to the U-shaped groove. The other end of the roller assembly and the elastic body 9 are located in the receiving cavity, and the elastic body 9 is under pressure. When the straight arm 3 of the blocking hook is not subjected to lateral disturbance, the straight arm 3 of the blocking hook and the roller assembly are aligned with the center line of the U-shaped groove and are in a centered state. When the straight arm 3 of the blocking hook is subjected to lateral disturbance, the straight arm 3 of the blocking hook rotates around the straight arm connecting assembly, causing the roller assembly to slide in the U-shaped groove. The roller assembly further compresses the elastic body 9, and the straight arm 3 of the blocking hook generates a restoring torque. When the lateral disturbance to the straight arm 3 of the blocking hook disappears, the straight arm 3 of the blocking hook drives the roller assembly to return to the centered state under the action of the restoring torque.

[0027] This configuration provides a centering device for an arresting hook. This device achieves longitudinal and lateral rotation of the arresting hook through a fuselage support shaft 1, a longitudinal rotating joint 2, and a straight arm connecting assembly. The U-shaped groove of the longitudinal rotating joint 2, in cooperation with the roller assembly and the elastic body 9, generates a restoring torque when the straight arm 3 of the arresting hook is subjected to lateral disturbance, causing the straight arm 3 to return to its centering state. The arresting hook centering device of this invention has a simple structure, is lightweight, and can reliably restore the arresting hook to its centering position. Compared with the prior art, the technical solution of this invention can solve the technical problems of complex structure and low reliability in existing arresting hook centering devices.

[0028] Furthermore, in this invention, as Figure 2 As shown, to facilitate the sliding of the roller assembly within the U-shaped groove, the roller assembly can be configured to include a roller 7, a roller shaft 6, and a roller connecting rod 8. The roller 7 contacts the U-shaped groove, and the roller 7 is hinged to one end of the roller connecting rod 8 via the roller shaft 6. The other end of the roller connecting rod 8 is connected to an elastic body 9. The arrangement of the roller 7 and roller shaft 6 facilitates the sliding of the roller assembly within the U-shaped groove when the straight arm 3 of the blocking hook is subjected to lateral disturbance.

[0029] Furthermore, in this invention, a cylindrical bearing can be used instead of the roller 7 to reduce friction between the roller and the roller shaft 6.

[0030] Furthermore, in this invention, to facilitate the sliding of the roller assembly driven by the straight arm 3 of the arresting hook when subjected to lateral disturbances, the other end of the roller connecting rod 8 can be configured to contact the inner wall of the receiving cavity. With the above arrangement, the roller connecting rod 8 can be driven to rotate quickly and promptly when the straight arm 3 of the arresting hook rotates around the straight arm connecting assembly.

[0031] Furthermore, in this invention, to reduce the friction between the roller connecting rod 8 and the receiving cavity of the blocking hook straight arm 3, the roller assembly may also include a linear bearing, which is located between the roller connecting rod 8 and the receiving cavity. When the blocking hook straight arm 3 drives the roller connecting rod 8 to rotate, the roller connecting rod 8 moves along the axial direction of the blocking hook straight arm 3 under the limiting action of the U-shaped groove, further compressing the elastic body 9. The linear bearing can reduce the sliding friction between the roller connecting rod 8 and the inner wall of the receiving cavity of the blocking hook straight arm 3.

[0032] Furthermore, in this invention, the elastic body 9 may be a spring or other type of elastic body. The elastic body 9 is always under compression in the arresting hook centering device.

[0033] Furthermore, in this invention, as Figure 4 and Figure 5 As shown, the U-shaped groove limits the lateral deflection angle of the arresting hook straight arm 3 relative to the centering state to [-20°, 20°]. When the arresting hook straight arm 3 is in the centering state, the arresting hook straight arm 3 and the roller assembly are aligned with the bottom end of the U-shaped groove, and the lateral deflection angle of the arresting hook straight arm 3 is 0°. When the carrier-based aircraft lands relative to the deck at a certain roll angle, the arresting hook rebounds upon contact with the ship, and the lateral impulse causes the arresting hook straight arm 3 to deflect rapidly. The rolling assembly slides within the U-shaped groove. Due to the shape of the U-shaped groove, the lateral deflection angle of the arresting hook straight arm 3 is limited to [-20°, 20°].

[0034] Furthermore, in this invention, if the lateral impulse received by the arresting hook after contacting the ship is large, and the arresting hook straight arm 3 still has a certain speed after a lateral deflection of ±20°, the arresting hook centering device can also include two elastic limiting members 15. The two elastic limiting members 15 are located inside the port of the U-shaped groove. When the lateral deflection angle of the arresting hook straight arm 3 is greater than ±20°, the roller connecting rod 8 collides with the elastic limiting members 15. The elastic limiting members 15 allow the arresting hook straight arm 3 to quickly decelerate to 0 and rotate in the opposite direction, gradually returning to the centering state. As a specific embodiment of this invention, the elastic limiting members 15 can be made of rubber material.

[0035] Furthermore, in this invention, in order to achieve the hinged connection between the straight arm 3 of the barrier hook and the longitudinal rotating joint 2, the straight arm connection assembly can be configured to include a straight arm rotating shaft 4 and a nut 5. The straight arm rotating shaft 4 passes through the longitudinal rotating joint 2 and the straight arm 3 of the barrier hook, and the nut 5 is connected to the straight arm rotating shaft 4 to fix the straight arm rotating shaft 4.

[0036] Furthermore, in this invention, such as Figure 2 and Figure 3 As shown, in order to quickly return to the centering state after the lateral disturbance experienced by the straight arm 3 of the arresting hook disappears, the arresting hook centering device can be configured to include a first grinding plate 11 and a second grinding plate 12. The first grinding plate 11 is embedded in the surface of the longitudinal rotating joint 2 that contacts the straight arm 3 of the arresting hook, and the surface of the first grinding plate 11 is flush with the surface of the longitudinal rotating joint 2. The second grinding plate 12 is embedded in the surface of the straight arm 3 of the arresting hook that contacts the longitudinal rotating joint 2, and the first grinding plate 11 and the second grinding plate 12 are in contact. By setting the first grinding plate 11 and the second grinding plate 12, the sliding friction between the straight arm 3 of the arresting hook and the longitudinal rotating joint 2 can be increased during the swinging process of the straight arm 3 of the arresting hook returning to the centering state. This sliding friction can play a damping role, which can reduce the swing amplitude and the number of swings of the straight arm 3 of the arresting hook, so that the straight arm 3 of the arresting hook can quickly return to the centering state and improve the stability of the system.

[0037] In this invention, to further increase the sliding friction between the straight arm 3 of the arresting hook and the longitudinal rotating joint 2, the straight arm 3 of the arresting hook can be configured to include two lugs, with the longitudinal rotating joint 2 located between the two lugs. The arresting hook centering device further includes a third grinding plate 13 and a fourth grinding plate 14. The first grinding plate 11 and the second grinding plate 12 are located between the longitudinal rotating joint 2 and the first lug, while the third grinding plate 13 and the fourth grinding plate 14 are located between the longitudinal rotating joint 2 and the second lug. The third grinding plate 13 is embedded in the surface of the longitudinal rotating joint 2 that contacts the second lug, and its surface is flush with the surface of the longitudinal rotating joint 2. The fourth grinding plate 14 is embedded in the surface of the second lug that contacts the longitudinal rotating joint 2, and the third grinding plate 13 and the fourth grinding plate 14 are in contact. By providing two lugs and two sets of grinding plates, the sliding friction between the straight arm 3 of the arresting hook and the longitudinal rotating joint 2 can be further increased, thereby reducing the swing amplitude and the number of swings of the straight arm 3 of the arresting hook, and increasing the speed at which the straight arm 3 of the arresting hook returns to the centering state.

[0038] Furthermore, in this invention, to facilitate adjustment of the damping of the straight arm 3 of the arresting hook during the return-to-center process, the arresting hook centering device may include multiple pressure adjusting components 10. The first and second lugs have multiple through holes, and the multiple pressure adjusting components 10 correspond one-to-one with each of the through holes. Each pressure adjusting component 10 is located within a through hole and connected to either the second grinding plate 12 or the fourth grinding plate 14. The pressure adjusting component 10 is used to adjust the pressure between the second grinding plate 12 and the first grinding plate 11, and between the fourth grinding plate 14 and the third grinding plate 13. By changing the pressure between two relative grinding plates through the pressure adjusting component 10, the frictional force between the grinding plates can be changed, thereby changing the damping magnitude. After the lateral disturbance experienced by the straight arm 3 of the arresting hook disappears, under the combined action of the return-to-center torque and frictional damping, the straight arm 3 of the arresting hook can quickly recover and stabilize in the centering state. Furthermore, the frictional force between the grinding plates should not be adjusted too high to avoid the straight arm 3 of the arresting hook failing to return to center. The grinding plates are consumable parts and need to be replaced promptly after a certain number of uses to avoid affecting the reliability of the return-to-center process.

[0039] In a specific embodiment of the present invention, the pressure adjusting component 10 can be a bolt, and the pressure between the two grinding discs can be adjusted by the tightness of the bolt. The number of pressure adjusting components 10 can be set according to actual needs and size requirements. For example, three pressure adjusting components 10 can be set to adjust the second grinding disc 12, and three pressure adjusting components 10 can be set to adjust the fourth grinding disc 14. The size of the grinding discs can be designed according to the actual friction requirements and structural dimensions. For example, the first grinding disc 11 and the third grinding disc 13 can be large-sized grinding discs, and the second grinding disc 12 and the fourth grinding disc 14 can be small-sized grinding discs.

[0040] With this configuration, when the arresting hook arm 3 is not subjected to lateral disturbance, the arresting hook system is in a stable state. The arresting hook arm 3 and the roller assembly are aligned with the centerline of the U-shaped groove, the roller 7 is located at the bottom of the U-shaped groove, the lateral deflection angle of the arresting hook arm 3 is 0°, and the arresting hook arm 3 is in a centered state. When the carrier-based aircraft lands relative to the deck at a certain roll angle, the arresting hook rebounds upon contact with the ship. The lateral impulse causes the arresting hook arm 3 to rotate rapidly around the arm pivot 4, causing the roller connecting rod 8 to deflect. The roller 7 slides within the U-shaped groove, increasing the pressure between the roller 7 and the U-shaped surface. The roller connecting rod 8 moves along the axial direction of the arresting hook arm 3, further compressing the spring. Restricted by the U-shaped groove, under the action of the compression spring, the arresting hook arm 3 generates a restoring torque. Once the lateral disturbance experienced by the straight arm 3 of the blocking hook disappears, the straight arm 3 of the blocking hook, under the action of the restoring torque, drives the roller assembly to reciprocate within the U-shaped groove. After repeatedly crossing the centering position, the system gradually stabilizes and returns to the centering state. During the reciprocating motion of the straight arm 3 of the blocking hook, relative sliding occurs between the opposing grinding discs, generating sliding friction, which further reduces the swing amplitude and frequency of the straight arm 3 of the blocking hook, accelerating the system's return to the centering state.

[0041] When a carrier-based aircraft lands and engages the arresting hook in an eccentric or sideslip state, the arresting hook arm 3 is subjected to the lateral component of the arresting force and deflects around the arm pivot 4. It then maintains a certain deflection angle while bearing the arresting force. The arresting force is much higher than the restoring force of the arresting hook arm 3. Therefore, the arresting hook arm 3 is almost only subjected to the axial arresting force and will not be damaged by bending moment, thus ensuring the reliable use of the arresting hook.

[0042] The centering device for the arresting hook of the present invention achieves the centering function using simple components such as springs, U-shaped grooves, and roller assemblies, resulting in a lightweight, simple, and reliable device. Furthermore, this centering device has a damping function, and the damping force can be easily adjusted via a pressure adjusting bolt. This damping device has a simple structure, is stable and reliable, and effectively reduces the amplitude and frequency of swinging of the arresting hook's straight arm.

[0043] To gain a further understanding of the present invention, the following description is provided in conjunction with... Figures 1 to 5 The centering device for the blocking hook of the present invention will be described in detail.

[0044] like Figures 1 to 5 As shown, a specific embodiment of the present invention provides a centering device for a blocking hook, which includes: a body support shaft 1, a longitudinal rotating joint 2, a blocking hook straight arm 3, a straight arm connecting assembly, a roller assembly, a spring, two elastic limiting members 15, a first grinding plate 11, a second grinding plate 12, a third grinding plate 13, a fourth grinding plate 14, and a plurality of pressure adjusting members 10.

[0045] The fuselage support shaft 1 is fixed to the fuselage, and the longitudinal rotating joint 2 is hinged to the fuselage support shaft 1 to realize the longitudinal rotation of the arresting hook.

[0046] The straight boom connection assembly includes a straight boom pivot 4 and a nut 5. The straight boom pivot 4 passes through the longitudinal swivel joint 2 and the stop hook straight boom 3. The nut 5 is connected to the straight boom pivot 4 to fix the straight boom pivot 4.

[0047] The roller assembly includes a roller 7, a roller shaft 6, a roller connecting rod 8, and a linear bearing. The roller 7 contacts a U-shaped groove and is hinged to one end of the roller connecting rod 8 via the roller shaft 6. The other end of the roller connecting rod 8 is connected to a spring. The linear bearing is located between the roller connecting rod 8 and the receiving cavity.

[0048] The U-shaped groove restricts the lateral deflection angle of the arresting hook straight arm 3 relative to the centering state to a range of [-20°, 20°]. If the lateral impulse received by the arresting hook after rebounding from the ship is large, the arresting hook straight arm 3 will still have a certain speed after lateral deflection of ±20°. The roller connecting rod 8 will collide with the elastic limiting member 15 located inside the port of the U-shaped groove.

[0049] The blocking hook straight arm 3 includes two lugs, with a longitudinal rotating joint 2 located between the two lugs. A first grinding disc 11 and a second grinding disc 12 are located between the longitudinal rotating joint 2 and the first lug. The first grinding disc 11 is embedded in the surface of the longitudinal rotating joint 2 that contacts the first lug, and its surface is flush with the surface of the longitudinal rotating joint 2. The second grinding disc 12 is embedded in the surface of the first lug that contacts the longitudinal rotating joint 2, and the first grinding disc 11 and the second grinding disc 12 are in contact. A third grinding disc 13 and a fourth grinding disc 14 are located between the longitudinal rotating joint 2 and the second lug. The third grinding disc 13 is embedded in the surface of the longitudinal rotating joint 2 that contacts the second lug, and its surface is flush with the surface of the longitudinal rotating joint 2. The fourth grinding disc 14 is embedded in the surface of the second lug that contacts the longitudinal rotating joint 2, and the third grinding disc 13 and the fourth grinding disc 14 are in contact.

[0050] The first and second ear pieces have multiple through holes, and multiple pressure regulating elements 10 correspond one-to-one with the multiple through holes. The pressure regulating elements 10 are located in the through holes and connected to the second grinding plate 12 or the fourth grinding plate 14. The pressure regulating elements 10 are used to adjust the pressure between the second grinding plate 12 and the first grinding plate 11, and between the fourth grinding plate 14 and the third grinding plate 13.

[0051] In summary, this invention provides a centering device for an arresting hook. This device achieves longitudinal and lateral rotation of the arresting hook through a fuselage support shaft, a longitudinal rotating joint, and a straight arm connecting assembly. The U-shaped groove of the longitudinal rotating joint, in cooperation with the roller assembly and the elastic body, generates a restoring torque when the straight arm of the arresting hook is subjected to lateral disturbance, thus causing the straight arm to return to its centering state. The centering device of this invention has a simple structure, is lightweight, and can reliably restore the arresting hook to its centering state. Compared with the prior art, the technical solution of this invention can solve the technical problems of complex structure and low reliability in existing arresting hook centering devices.

[0052] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0053] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A centering device for an arresting hook, characterized in that, The arresting hook centering device includes: a fuselage support shaft (1), a longitudinal rotating joint (2), an arresting hook straight arm (3), a straight arm connecting assembly, a roller assembly, and an elastic body (9); the fuselage support shaft (1) is fixed to the fuselage, and the longitudinal rotating joint (2) is hinged to the fuselage support shaft (1) to achieve longitudinal rotation of the arresting hook; the arresting hook straight arm (3) is hinged to the longitudinal rotating joint (2) through the straight arm connecting assembly to achieve lateral rotation of the arresting hook; the longitudinal rotating joint (2) has a U-shaped groove on the side facing the arresting hook straight arm (3), one end of the roller assembly slides in the U-shaped groove, and the other end is connected to the elastic body (9); the end of the arresting hook straight arm (3) opposite to the U-shaped groove has The other end of the roller assembly and the elastic body (9) are located in the receiving cavity, and the elastic body (9) is under pressure. When the straight arm (3) of the blocking hook is not subjected to lateral disturbance, the straight arm (3) of the blocking hook and the roller assembly are aligned with the center line of the U-shaped groove and are in a centered state. When the straight arm (3) of the blocking hook is subjected to lateral disturbance, the straight arm (3) of the blocking hook rotates around the straight arm connecting assembly, causing the roller assembly to slide in the U-shaped groove. The roller assembly further squeezes the elastic body (9), and the straight arm (3) of the blocking hook generates a restoring torque. When the lateral disturbance of the straight arm (3) of the blocking hook disappears, the straight arm (3) of the blocking hook drives the roller assembly to return to the centered state under the action of the restoring torque. The roller assembly includes a roller (7), a roller shaft (6), and a roller connecting rod (8). The roller (7) contacts the U-shaped groove. The roller (7) is hinged to one end of the roller connecting rod (8) through the roller shaft (6). The other end of the roller connecting rod (8) is connected to the elastic body (9). The U-shaped groove restricts the straight arm of the arresting hook (3) and the range of its lateral deflection angle relative to the centering state is as follows: ; The centering device of the blocking hook also includes two elastic limiting members (15). The two elastic limiting members (15) are located inside the port of the U-shaped groove. When the lateral deflection angle of the straight arm (3) of the blocking hook is greater than ±20°, the roller connecting rod (8) collides and contacts the elastic limiting member (15). The centering device for the blocking hook further includes a first grinding plate (11) and a second grinding plate (12). The first grinding plate (11) is embedded in the surface of the longitudinal rotating joint (2) that contacts the straight arm (3) of the blocking hook. The surface of the first grinding plate (11) is flush with the surface of the longitudinal rotating joint (2). The second grinding plate (12) is embedded in the surface of the straight arm (3) of the blocking hook that contacts the longitudinal rotating joint (2). The first grinding plate (11) and the second grinding plate (12) are in contact. The blocking hook straight arm (3) includes two lugs, and the longitudinal rotating joint (2) is located between the two lugs. The blocking hook centering device also includes a third grinding plate (13) and a fourth grinding plate (14). The first grinding plate (11) and the second grinding plate (12) are located between the longitudinal rotating joint (2) and the first lug. The third grinding plate (13) and the fourth grinding plate (14) are located between the longitudinal rotating joint (2) and the second lug. The third grinding plate (13) is embedded in the surface of the longitudinal rotating joint (2) that contacts the second lug. The surface of the third grinding plate (13) is flush with the surface of the longitudinal rotating joint (2). The fourth grinding plate (14) is embedded in the surface of the second lug that contacts the longitudinal rotating joint (2). The third grinding plate (13) and the fourth grinding plate (14) are in contact.

2. The arresting hook centering device according to claim 1, characterized in that, The side of the other end of the roller connecting rod (8) contacts the inner wall of the receiving cavity.

3. The centering device for the arresting hook according to claim 1, characterized in that, The roller assembly also includes a linear bearing located between the roller connecting rod (8) and the receiving cavity.

4. The centering device for the arresting hook according to claim 1, characterized in that, The straight boom connection assembly includes a straight boom pivot (4) and a nut (5). The straight boom pivot (4) passes through the longitudinal rotating joint (2) and the stop hook straight boom (3). The nut (5) is connected to the straight boom pivot (4) to fix the straight boom pivot (4).

5. The centering device for the arresting hook according to claim 1, characterized in that, The centering device of the blocking hook also includes multiple pressure adjusting components (10). The first ear plate and the second ear plate have multiple through holes. The multiple pressure adjusting components (10) correspond one-to-one with the multiple through holes. The pressure adjusting component (10) is located in the through hole and connected to the second grinding plate (12) or the fourth grinding plate (14). The pressure adjusting component (10) is used to adjust the pressure between the second grinding plate (12) and the first grinding plate (11), and between the fourth grinding plate (14) and the third grinding plate (13).

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