Deployment posture limiting mechanism of bait empennage and bait

Abstract

The invention belongs to the technical field of radio frequency baits, and provides a bait empennage unfolding posture limiting mechanism and bait, the limiting mechanism comprises an empennage, a rotating shaft, a limiting pin and an elastic piece, and after the bait is thrown, the empennage is in an unfolding state; the empennage is movably connected with the bait shell through a rotating shaft, the rotating shaft synchronously rotates along with the empennage, and a first limiting groove is formed in the rotating shaft; one end of the limiting pin contacts with the rotating shaft; when the empennage is in an unfolded state, one end of the limiting pin is matched with the first limiting groove, so that the rotating shaft stops rotating; the elastic piece makes contact with the other end of the limiting pin and provides thrust towards the rotating shaft for the limiting pin. When the bait is thrown and the empennage is in an unfolded state, the limiting pin can be matched with the first limiting groove to limit the rotating shaft to continuously rotate, the unfolding angle of the empennage is kept, and the empennage is locked at a fixed position, so that the flying attitude of the bait can be stabilized, and the reliability of the bait is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of radio frequency decoys, and in particular to a deployment posture limiting mechanism for a decoy tail wing and the decoy. Background Art

[0002] In airborne RF decoys, the tail is used to adjust the decoy's attitude after vertical launch. Typically, the design incorporates four stabilizing fins. Before the decoy is deployed, the tail fins fold into the body of the missile, ensuring it fits snugly within the decoy compartment. After deployment, the tail fins automatically deploy to adjust the decoy's attitude.

[0003] At present, the tail fins of decoys are all opened by spring devices. When the tail fins are opened to the preset position, the shell of the decoy will limit the over-expansion of the tail fins to ensure that the opening angle of the tail fins meets the requirements. Figure 1 As shown, the spring of the tail wing is subjected to a large aerodynamic torque, which will cause the tail wing's opening angle to change dynamically under the impact of the airflow, causing the tail wing to have a tendency to retract, thereby causing the decoy's attitude adjustment function to fail and resulting in unstable flight attitude, affecting the decoy's effectiveness. Summary of the Invention

[0004] In view of the defects in the prior art, the present invention provides a decoy tail wing deployment posture limiting mechanism and a decoy, so as to solve the problem that the current decoy tail wing is easily affected by airflow impact, resulting in the tail wing having a tendency to retract.

[0005] In a first aspect, the present invention provides a decoy tail fin deployment posture limiting mechanism, comprising: The tail fin is in the extended position after the bait is cast; A rotating shaft, wherein the tail wing is movably connected to the bait housing through the rotating shaft, the rotating shaft rotates synchronously with the tail wing, and a first limiting groove is provided on the rotating shaft; the rotating shaft includes a synchronous section and a limiting section, the first limiting groove is provided in the limiting section, and the synchronous section is provided with a limiting protrusion that cooperates with the tail wing; a limit pin, one end of which contacts the synchronization section; when the empennage is in the deployed state, one end of the limit pin cooperates with the first limit slot to stop the rotation of the rotating shaft and keep the empennage in a fixed position; The elastic member contacts the other end of the limiting pin and provides a thrust for the limiting pin toward the rotating shaft.

[0006] It can be seen from the above technical solution that the present invention provides a deployment posture limiting mechanism for the bait tail wing. After the bait is thrown, the tail wing is in the deployed state, and the limit pin will cooperate with the first limit groove to limit the continued rotation of the rotating shaft, thereby maintaining the deployment angle of the tail wing and locking the tail wing in a fixed position, thereby stabilizing the flight posture of the bait and improving the reliability of the bait.

[0007] Optionally, the elastic member is a U-shaped spring, and the two tail wings located on the same side are limited by the same U-shaped spring to push the two limiting pins respectively.

[0008] Optionally, a second limiting groove is provided on the side of the bait shell, a stop boss is provided at the bottom of the second limiting groove, the elastic member is provided in the second limiting groove and is limited by the stop boss; a cover plate is also provided on the top of the second limiting groove.

[0009] It can be seen from the above technical solution that after the U-shaped spring is subjected to the reverse thrust of the limiting pin, it is stopped by the stop boss to avoid excessive deformation of the elastic member and affect the use effect.

[0010] Optionally, a limiting through hole is further provided on the bait housing, and the limiting through hole is arranged in conjunction with the elastic member; the limiting pin is passed through the limiting through hole.

[0011] It can be seen from the above technical solution that the limiting through hole enables the limiting pin to be pressed toward the rotating shaft along a specified path, thereby preventing the limiting pin from being offset and unable to cooperate with the first limiting groove, thereby improving the reliability of the limit.

[0012] Optionally, the diameter of the limiting segment is larger than the diameter of the synchronization segment.

[0013] Optionally, the rotating shaft includes a synchronization section and a limiting section, the limiting section is provided with a limiting slot along the circumferential direction, and the limiting slot is arranged in conjunction with the limiting pin to achieve axial limitation of the limiting pin relative to the rotating shaft.

[0014] Optionally, a mounting groove is provided on the bait housing, the mounting groove and the limiting section are matched, and the mounting groove and the limiting through hole are communicated.

[0015] Optionally, the first limit groove is opened in the limit slide groove, and the first limit groove includes a first limit surface and a second limit surface arranged vertically. When the tail wing is in the expanded state, the outer wall of the limit pin is in contact with the first limit surface, and one end of the limit pin is in contact with the second limit surface.

[0016] It can be seen from the above technical solution that when the limit pin is in contact with the first limit surface and the second limit surface at the same time, the first limit groove and the limit pin are limited, and the elastic part always provides the limit pin with a thrust toward the rotating shaft to ensure that the limit pin and the first limit groove are in contact with each other.

[0017] Optionally, one end of the limit pin is chamfered, and two ends of the second limit surface form a right angle with the inner wall of the limit slot, which can effectively reduce the risk of collision between the limit pin and the rotating shaft and ensure the reliability of the limit structure.

[0018] In a second aspect, the present invention provides a decoy comprising a deployment posture limiting mechanism for a decoy tail wing according to any possible implementation of the first aspect.

[0019] By adopting the above technical solution, this application has the following technical effects: The present invention provides a deployment posture limiting mechanism for the tail wing of a bait. After the bait is thrown, the tail wing is in the deployed state. The limiting pin cooperates with the first limiting groove to limit the continued rotation of the rotating shaft, thereby maintaining the deployment angle of the tail wing and locking the tail wing in a fixed position, thereby stabilizing the flight posture of the bait and improving the reliability of the bait. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the decoy tail being impacted by airflow; Figure 2 A schematic diagram of a deployment posture limiting mechanism for a decoy tail wing provided by an embodiment of the present invention; Figure 3 for Figure 2 The diagram shows the decoy tail fin's deployment posture limiting mechanism with the cover removed; Figure 4 A schematic diagram of a tail wing and a rotating shaft provided in an embodiment of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of part A; Figure 6 A schematic diagram of a rotating shaft provided in an embodiment of the present invention; Figure 7 Another schematic diagram of a deployment posture limiting mechanism for a decoy tail wing provided by an embodiment of the present invention; Figure 8 for Figure 7 A magnified schematic diagram of part B; Figure 9 This is a schematic diagram of the rotating shaft and the limiting pin provided in an embodiment of the present invention when the tail wing is in the deployed state.

[0022] Reference numerals: 1-tail wing; 2-rotating shaft; 21-synchronizing section; 211-limiting protrusion; 22-limiting section; 221-limiting slide; 222-first limiting groove; 222A-first limiting surface; 222B-second limiting surface; 3-limiting pin; 4-elastic member; 5-bait housing; 51-second limiting groove; 52-stop boss; 53-limiting through hole; 54-mounting slot; 6-cover plate. DETAILED DESCRIPTION

[0023] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention. It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0024] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0026] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0027] Example 1 Before the bait is thrown, the tail fin 1 is in a folded state; once the bait is thrown, the tail fin 1 will be in an unfolded state and remain in a fixed position to ensure the posture of the bait. Figure 2-9As shown, the present invention provides a deployment posture limiting mechanism for a bait tail wing, which is used to ensure the angular deployment posture limiting mechanism of the tail wing 1 after the bait is thrown. The mechanism includes a tail wing 1, a rotating shaft 2, a limiting pin 3 and an elastic member 4. The tail wing 1 is movably connected to the bait shell 5 through the rotating shaft 2, and the rotating shaft 2 rotates synchronously with the tail wing 1. A first limiting groove 222 is provided on the rotating shaft 2; the rotating shaft 2 includes a synchronization section 21 and a limiting section 22, the first limiting groove 222 is provided in the limiting section 22, and the synchronization section 21 is provided with a limiting protrusion 211 that cooperates with the tail wing 1; since the elastic member 4 provides an elastic force toward the rotating shaft 2, one end of the limiting pin 3 will always be in contact with the synchronization section 21; when the tail wing 1 is in the deployed state, one end of the limiting pin 3 is matched with the first limiting groove 222 to stop the rotating shaft 2; the elastic member 4 is in contact with the other end of the limiting pin 3 to provide a thrust toward the rotating shaft 2 for the limiting pin 3.

[0028] Based on this, the limit pin 3 will cooperate with the first limit slot 222 to limit the further rotation of the rotating shaft 2, thereby maintaining the expansion angle of the tail wing 1 when it is in the expanded state, and locking the tail wing 1 in a fixed position, thereby stabilizing the flight posture of the bait and improving the reliability of the bait.

[0029] like Figure 3 As shown, the elastic member 4 is a U-shaped spring. The two tail wings 1 on the same side are respectively pushed by the same U-shaped spring to limit the position of the two limit pins 3. Therefore, only one U-shaped spring is required for the two tail wings 1 on the same side, which is conducive to the miniaturization of the bait. The side of the bait housing 5 is provided with a second limit groove 51, and the bottom of the second limit groove 51 is provided with a stop boss 52. The elastic member 4 is set in the second limit groove 51 and is limited by the stop boss 52. Figure 2 As shown, a cover plate 6 is further provided on the top of the second limiting groove 51. After the U-shaped spring is reversely pushed by the limiting pin 3, it is stopped by the stop boss 52 to prevent the elastic member 4 from being excessively deformed and affecting the use effect.

[0030] Optionally, the lure housing 5 further defines a limit hole 53, which cooperates with the elastic member 4. The limit pin 3 is disposed within the limit hole 53. The limit hole 53 allows the limit pin 3 to press toward the rotating shaft 2 along a predetermined path, preventing the limit pin 3 from deviating and thus failing to engage with the first limit slot 222, thereby improving the reliability of the limit.

[0031] like Figure 4-5 As shown, the limiting segment 22 is provided with a limiting slot 221 along the circumferential direction, and the limiting slot 221 is arranged in conjunction with the limiting pin 3 to achieve axial limiting of the limiting pin 3 relative to the rotating shaft 2 .

[0032] In a specific embodiment, the limiting protrusion 211 and the rotating shaft 2 are concentrically arranged, and the cross section of the limiting protrusion 211 is square.

[0033] like Figure 6 As shown, the diameter of the limiting segment 22 is larger than the diameter of the synchronization segment 21. Figure 7-8 As shown, the lure housing 5 has a mounting slot 54 formed therein. The mounting slot 54 cooperates with the retaining section 22 and communicates with the retaining through-hole 53. The mounting slot 54 cooperates with the retaining section 22, and the retaining pin 3 further secures the relative position of the rotating shaft 2 and the lure housing 5, preventing the rotating shaft 2 from shifting.

[0034] like Figure 6 、 9 As shown, the first limiting groove 222 is defined within the limiting slide groove 221 and includes a first limiting surface 222A and a second limiting surface 222B disposed perpendicularly thereto. When the empennage 1 is deployed, the outer wall of the limiting pin 3 abuts the first limiting surface 222A, and one end surface of the limiting pin 3 abuts the second limiting surface 222B. When the limiting pin 3 abuts both the first limiting surface 222A and the second limiting surface 222B, the first limiting groove 222 and the limiting pin 3 are positioned. The elastic member 4 constantly provides the limiting pin 3 with a thrust force toward the rotating shaft 2, ensuring contact between the limiting pin 3 and the first limiting groove 222.

[0035] like Figure 9 As shown, one end of the stop pin 3, which contacts the rotating shaft 2, is chamfered, and the two ends of the second stop surface 222B form a right angle with the inner wall of the stop slot 221. This effectively reduces the risk of collision between the stop pin 3 and the rotating shaft 2, ensuring the reliability of the stop structure.

[0036] Based on the deployment posture limiting mechanism of the lure tail wing provided in this embodiment, when the tail wing 1 is impacted, the limiting pin 3 will cooperate with the rotating shaft 2 to keep the tail wing 1 in a fixed position, thereby stabilizing the flight posture of the lure and improving the reliability of the lure.

[0037] Example 2 A bait is provided, comprising the deployment posture limiting mechanism of the bait tail provided in Example 1. The bait provided in this embodiment and the deployment posture limiting mechanism of the bait tail provided in the above-mentioned embodiment adopt the same inventive concept and can achieve the same beneficial effects, which will not be repeated here.

[0038] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A decoy tail fin deployment posture limiting mechanism, characterized in that: include: The tail fin is in the extended position after the bait is cast; A rotating shaft, wherein the tail wing is movably connected to the bait housing through the rotating shaft, the rotating shaft rotates synchronously with the tail wing, and a first limiting groove is provided on the rotating shaft; the rotating shaft includes a synchronous section and a limiting section, the first limiting groove is provided in the limiting section, and the synchronous section is provided with a limiting protrusion that cooperates with the tail wing; a limit pin, one end of which contacts the synchronization section; when the empennage is in the deployed state, one end of the limit pin cooperates with the first limit slot to stop the rotation of the rotating shaft and keep the empennage in a fixed position; The elastic member contacts the other end of the limiting pin and provides a thrust for the limiting pin toward the rotating shaft.

2. The decoy tail fin deployment posture limiting mechanism according to claim 1, characterized in that: The elastic member is a U-shaped spring, and the two tail wings located on the same side are respectively pushed by the same U-shaped spring to limit the two limiting pins.

3. The decoy tail fin deployment posture limiting mechanism according to claim 2, characterized in that: A second limiting groove is provided on the side of the bait housing, a stopping boss is provided at the bottom of the second limiting groove, the elastic member is provided in the second limiting groove and is limited by the stopping boss; a cover plate is also provided on the top of the second limiting groove.

4. The decoy tail fin deployment posture limiting mechanism according to claim 3, characterized in that: The bait housing is further provided with a limiting through hole, which is arranged to cooperate with the elastic member; the limiting pin is passed through the limiting through hole.

5. The decoy tail fin deployment posture limiting mechanism according to claim 4, characterized in that: The diameter of the limiting segment is larger than the diameter of the synchronization segment.

6. The decoy tail fin deployment posture limiting mechanism according to claim 5, characterized in that: The limiting section is provided with a limiting sliding groove along the circumferential direction, and the limiting sliding groove is arranged in conjunction with the limiting pin to realize axial limiting of the limiting pin relative to the rotating shaft.

7. The decoy tail fin deployment posture limiting mechanism according to claim 6, characterized in that: The bait housing is provided with a mounting groove, the mounting groove and the limiting section are matched, and the mounting groove and the limiting through hole are communicated.

8. The decoy tail fin deployment posture limiting mechanism according to claim 7, characterized in that: The first limiting groove is opened in the limiting slide groove, and the first limiting groove includes a first limiting surface and a second limiting surface arranged vertically. When the tail wing is in the unfolded 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.

9. The decoy tail fin deployment posture limiting mechanism according to claim 8, characterized in that: One end of the limiting pin is chamfered, and two ends of the second limiting surface and the inner wall of the limiting sliding groove form an arc right angle.

10. A bait, characterized in that: The invention comprises the deployment posture limiting mechanism of the bait tail wing described in any one of claims 1-9.

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