Bait empennage limiting mechanism and bait
By designing a tail fin limiting mechanism for the decoy and utilizing the cooperation of a rotating shaft and a limiting pin, the problem of tail fin recovery under airflow impact was solved, achieving stable tail fin deployment and improving the flight reliability of the decoy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANGZHOU KEMING SEMICON LIGHTING IND TECH RES INST CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-15
AI Technical Summary
In existing technologies, the decoy tail fin is easily retracted under airflow impact, causing the attitude adjustment function to fail and affecting flight attitude stability.
Design a decoy tail fin limiting mechanism. Through the cooperation of the rotating shaft and the limiting pin, the elastic element provides thrust to keep the tail fin at a fixed angle after deployment. The limiting groove and the stop boss restrict the rotation of the rotating shaft to ensure that the tail fin is locked in a fixed position.
It stabilizes the decoy's flight attitude, improves the decoy's reliability, ensures that the tail fin does not retract under airflow impact, and maintains effective attitude adjustment function.
Smart Images
Figure CN224246889U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of airborne radio frequency decoy technology, specifically to a decoy tail fin limiting mechanism and a decoy. Background Technology
[0002] In airborne radio frequency decoys, the tail fins are used to adjust the attitude of the decoy after vertical launch, and are generally designed with four stabilizing tail fins. Before the decoy is launched, the tail fins are folded into the fuselage so that the decoy can be well contained in the decoy compartment; after the decoy is launched, the tail fins automatically deploy to adjust the attitude of the decoy.
[0003] Currently, all decoy fins use a spring mechanism to open. When the fin opens to the preset position, the decoy's shell limits its excessive deployment to ensure the opening angle meets requirements. However, during the vertical launch process of the decoy, if... Figure 1 As shown, the spring of the tail fin experiences a large aerodynamic torque, which causes the tail fin's opening angle to change dynamically under the impact of airflow. This results in a tendency for the tail fin to retract, causing the decoy's attitude adjustment function to fail, leading to unstable flight attitude and affecting the decoy's effectiveness. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a decoy tail fin limiting mechanism and a decoy, in order to solve the problem that the current decoy tail fin is easily affected by airflow impact, causing the tail fin to tend to retract.
[0005] In a first aspect, the present invention provides a decoy tail fin limiting mechanism, comprising:
[0006] The tail fin is folded before the bait is thrown and unfolded after the bait is thrown.
[0007] A pivot shaft is provided, the tail fin is movably connected to the decoy shell via the pivot shaft, the pivot shaft rotates synchronously with the tail fin, and a first limiting groove is provided on the pivot shaft;
[0008] A limiting pin is provided, with one end in contact with the rotating shaft. When the tail fin is in the deployed state, one end of the limiting pin is engaged with the first limiting groove to stop the rotating shaft from rotating.
[0009] The elastic element contacts the other end of the limiting pin, providing the limiting pin with a thrust toward the rotating shaft.
[0010] As can be seen from the above technical solution, the decoy tail fin limiting mechanism provided by this utility model allows the tail fin to be in the deployed state after the decoy is thrown. The limiting pin will cooperate with the first limiting groove to restrict the rotating shaft from continuing to rotate, thereby maintaining the deployment angle of the tail fin and locking the tail fin in a fixed position, thereby stabilizing the flight attitude of the decoy and improving the reliability of the decoy.
[0011] Optionally, the elastic element is a U-shaped spring, and the two tail fins located on the same side are limited by the same U-shaped spring pushing the two limiting pins respectively. Only one elastic element is needed for the two tail fins on the same side, which helps to minimize the size of the decoy.
[0012] Optionally, a second limiting groove is provided on the side of the bait shell, and a stop boss is provided at the bottom of the second limiting groove. The elastic element is disposed in the second limiting groove and is limited by the stop boss. A cover plate is also provided at the top of the second limiting groove.
[0013] As can be seen from the above technical solution, after the U-shaped spring is pushed in the opposite direction by the limiting pin, it is stopped by the stop boss to avoid excessive deformation of the elastic element, which would affect the performance.
[0014] Optionally, the decoy shell is further provided with a limiting through hole, which is configured to cooperate with the elastic element; the limiting pin passes through the limiting through hole.
[0015] As can be seen from the above technical solution, the limiting through hole allows the limiting pin to press against the rotating shaft along a specified path, avoiding the situation where the limiting pin is deviated and cannot cooperate with the first limiting groove, thus improving the reliability of the limiting.
[0016] Optionally, the rotating shaft includes a synchronization section and a limiting section.
[0017] The synchronization segment is provided with a limiting protrusion that cooperates with the tail fin;
[0018] The limiting section has a limiting groove along its circumference, and the limiting groove is configured to cooperate with the limiting pin to achieve axial limiting of the limiting pin relative to the rotating shaft.
[0019] Optionally, the decoy shell is provided with an installation groove, the installation groove and the limiting section are configured to cooperate, and the installation groove and the limiting through hole are connected.
[0020] Optionally, the first limiting groove is formed in the limiting slide groove. The first limiting groove includes a first limiting surface and a second limiting surface that are vertically arranged. When the tail fin is in the deployed state, the outer wall of the limiting pin is in contact with the first limiting surface, and one end of the limiting pin is in contact with the second limiting surface.
[0021] As can be seen from the above technical solution, when the limiting pin is simultaneously in contact with the first limiting surface and the second limiting surface, the first limiting groove and the limiting pin achieve limiting, and the elastic element always provides the limiting pin with a thrust that presses against the rotating shaft, ensuring that the limiting pin and the first limiting groove are in contact with each other.
[0022] Secondly, the present invention provides a decoy, including a decoy tail fin limiting mechanism in any possible implementation of the first aspect.
[0023] By adopting the above technical solution, this application has the following technical effects:
[0024] This utility model provides a decoy tail fin limiting mechanism. After the decoy is thrown, the tail fin is in the deployed state. The limiting pin will cooperate with the first limiting groove to restrict the rotation of the shaft, thereby maintaining the deployment angle of the tail fin and locking the tail fin in a fixed position, thus stabilizing the flight attitude of the decoy and improving the reliability of the decoy. Attached Figure Description
[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0026] Figure 1 This is a schematic diagram of the decoy's tail fin being impacted by airflow.
[0027] Figure 2 A schematic diagram of a decoy tail fin limiting mechanism provided for an embodiment of this utility model;
[0028] Figure 3 for Figure 2 The diagram shown is a schematic of the decoy tail fin limiting mechanism after the cover plate has been removed.
[0029] Figure 4 A schematic diagram of the tail fin and pivot provided for an embodiment of this utility model;
[0030] Figure 5 for Figure 4 Enlarged diagram of part A;
[0031] Figure 6 A schematic diagram of the rotating shaft provided in an embodiment of this utility model;
[0032] Figure 7 Another schematic diagram of a decoy tail fin limiting mechanism provided in an embodiment of this utility model;
[0033] Figure 8 for Figure 7 Enlarged diagram of part B;
[0034] Figure 9 This is a schematic diagram of the pivot and limiting pin provided in the embodiment of the present invention when the tail fin is in the deployed state.
[0035] Figure label:
[0036] 1-Tail fin; 2-Rotating shaft; 21-Synchronization section; 211-Limiting protrusion; 22-Limiting section; 221-Limiting groove; 222-First limiting groove; 222A-First limiting surface; 222B-Second limiting surface; 3-Limiting pin; 4-Elastic element; 5-Decoy shell; 51-Second limiting groove; 52-Stop boss; 53-Limiting through hole; 54-Mounting groove; 6-Cover plate. Detailed Implementation
[0037] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.
[0038] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.
[0039] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0040] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.
[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0042] Example 1
[0043] like Figure 2-9As shown, the present invention provides a decoy tail fin limiting mechanism, including a tail fin 1, a rotating shaft 2, a limiting pin 3, and an elastic element 4. Before the decoy is thrown, the tail fin 1 is in a folded state, and after the decoy is thrown, the tail fin 1 is in an unfolded state. The tail fin 1 is movably connected to the decoy shell 5 through the rotating shaft 2. The rotating shaft 2 rotates synchronously with the tail fin 1, and a first limiting groove 222 is provided on the rotating shaft 2. One end of the limiting pin 3 is in contact with the rotating shaft 2. When the tail fin 1 is in the unfolded state, one end of the limiting pin 3 is engaged with the first limiting groove 222 to stop the rotating shaft 2 from rotating. The elastic element 4 is in contact with the other end of the limiting pin 3, providing a thrust to the limiting pin 3 toward the rotating shaft 2.
[0044] After the decoy is thrown, the tail fin 1 is in the deployed state. The limiting pin 3 will cooperate with the first limiting groove 222 to limit the rotation of the rotating shaft 2, thereby maintaining the deployment angle of the tail fin 1 and locking the tail fin 1 in a fixed position, thus stabilizing the flight attitude of the decoy and improving the reliability of the decoy.
[0045] like Figure 3 As shown, the elastic element 4 is a U-shaped spring. The two tail fins 1 located on the same side are limited by the same U-shaped spring pushing two limiting pins 3 respectively. A second limiting groove 51 is provided on the side of the decoy shell 5. A stop boss 52 is provided at the bottom of the second limiting groove 51. The elastic element 4 is set in the second limiting groove 51 and is limited by the stop boss 52. A cover plate 6 is also provided at the top of the second limiting groove 51. After the U-shaped spring is pushed in the opposite direction by the limiting pin 3, it is stopped by the stop boss 52 to avoid excessive deformation of the elastic element 4, which would affect the use effect.
[0046] Optionally, the decoy shell 5 is also provided with a limiting through hole 53, which is configured to cooperate with the elastic element 4; the limiting pin 3 passes through the limiting through hole 53. The limiting through hole 53 allows the limiting pin 3 to press against the rotating shaft 2 along a specified path, preventing the limiting pin 3 from shifting and causing it to fail to cooperate with the first limiting groove 222, thereby improving the reliability of the limiting.
[0047] like Figure 4-5 As shown, the rotating shaft 2 includes a synchronizing section 21 and a limiting section 22. The synchronizing section 21 is provided with a limiting protrusion 211 that cooperates with the tail fin 1. The limiting section 22 is provided with a limiting groove 221 along the circumferential direction. The limiting groove 221 is provided in conjunction with the limiting pin 3 to achieve axial limiting of the limiting pin 3 relative to the rotating shaft 2.
[0048] In one specific implementation, the cross-section of the limiting protrusion 211 can be square.
[0049] like Figure 6 As shown, the diameter of the limiting segment 22 is larger than the diameter of the synchronization segment 21. For example... Figure 7-8 As shown, the bait shell 5 has an installation groove 54, which is configured to cooperate with the limiting section 22, and the installation groove 54 is connected to the limiting through hole 53.
[0050] like Figure 6 , 9 As shown, the first limiting groove 222 is formed within the limiting slide groove 221. The first limiting groove 222 includes a vertically arranged first limiting surface 222A and a second limiting surface 222B. When the tail fin 1 is in the deployed state, the outer wall of the limiting pin 3 is in contact with the first limiting surface 222A, and one end face of the limiting pin 3 is in contact with the second limiting surface 222B. When the limiting pin 3 is in contact with both the first limiting surface 222A and the second limiting surface 222B, the first limiting groove 222 and the limiting pin 3 are limited. The elastic element 4 always provides a thrust to the limiting pin 3 against the rotating shaft 2, ensuring that the limiting pin 3 and the first limiting groove 222 are in contact with each other.
[0051] Based on the decoy tail fin limiting mechanism provided in this embodiment, when the tail fin 1 is impacted, the limiting pin 3 will cooperate with the rotating shaft 2 to keep the tail fin 1 in a fixed position, thereby stabilizing the flight attitude of the decoy and improving the reliability of the decoy.
[0052] Example 2
[0053] A decoy is provided, including the decoy tail fin limiting mechanism provided in Embodiment 1. The decoy provided in this embodiment adopts the same inventive concept as the decoy tail fin limiting mechanism described above and can achieve the same beneficial effects, which will not be described again here.
[0054] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.
[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.
Claims
1. A decoy tail fin limiting mechanism, characterized in that, include: The tail fin is folded before the bait is thrown and unfolded after the bait is thrown. A pivot shaft is provided, the tail fin is movably connected to the decoy shell via the pivot shaft, the pivot shaft rotates synchronously with the tail fin, and a first limiting groove is provided on the pivot shaft; A limiting pin is provided, with one end in contact with the rotating shaft. When the tail fin is in the deployed state, one end of the limiting pin is engaged with the first limiting groove to stop the rotating shaft from rotating. The elastic element contacts the other end of the limiting pin, providing the limiting pin with a thrust toward the rotating shaft.
2. The decoy tail fin limiting mechanism according to claim 1, characterized in that, The elastic element is a U-shaped spring, and the two tail wings located on the same side are limited by the same U-shaped spring pushing the two limiting pins respectively.
3. The decoy tail fin limiting mechanism according to claim 2, characterized in that, The bait shell has a second limiting groove on its side, and a stop boss is provided at the bottom of the second limiting groove. The elastic element is disposed in the second limiting groove and is limited by the stop boss. A cover plate is also provided at the top of the second limiting groove.
4. The decoy tail fin limiting mechanism according to claim 3, characterized in that, The decoy shell is also provided with a limiting through hole, which is configured to cooperate with the elastic element; the limiting pin passes through the limiting through hole.
5. The decoy tail fin limiting mechanism according to claim 4, characterized in that, The rotating shaft includes a synchronization section and a limiting section. The synchronization segment is provided with a limiting protrusion that cooperates with the tail fin; The limiting section has a limiting groove along its circumference, and the limiting groove is configured to cooperate with the limiting pin to achieve axial limiting of the limiting pin relative to the rotating shaft.
6. The decoy tail fin limiting mechanism according to claim 5, characterized in that, The bait shell has an installation groove, which is configured to cooperate with the limiting section, and the installation groove is connected to the limiting through hole.
7. The decoy tail fin limiting mechanism according to claim 5, characterized in that, The first limiting groove is formed in the limiting slide groove. The first limiting groove includes a first limiting surface and a second limiting surface that are vertically arranged. When the tail fin is in the deployed state, the outer wall of the limiting pin is in contact with the first limiting surface, and one end of the limiting pin is in contact with the second limiting surface.
8. A decoy, characterized in that, Includes the decoy tail fin limiting mechanism as described in any one of claims 1-7.