Internal and external rotation reversible security mechanism
By using an internal and external reversible safety mechanism, the reversible conversion of the fuse state is achieved by using a motor to drive the internal rotating body. This solves the irreversibility problem of traditional fuse safety mechanisms, improves the safety and reliability of the fuse system, and ensures the safety of personnel and equipment.
Patent Information
- Application Number
- CN202511469884.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-15
- Publication Date
- 2025-11-18
AI Technical Summary
Traditional fuse security systems pose a risk of self-detonation or accidental detonation due to their one-way irreversibility, threatening personnel safety and equipment reuse.
The system employs an internal and external reversible safety mechanism. The internal rotating body is driven by a motor to rotate in both directions, enabling reversible switching between the safe and desafe states. The use of an arc-shaped slider and an arc-shaped guide groove ensures accurate and reliable state switching, while the gap design reduces friction.
It has improved the safety and reliability of the fuse system, eliminated the risk of self-detonation or accidental detonation, ensured personnel safety and equipment reuse, made state transitions accurate and reliable, and reduced unexpected risks in service operations.
Smart Images
Figure CN120970407A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of fuse safety system technology, specifically a reversible internal and external rotation security mechanism. Background Technology
[0002] The fuse safety system, through mechanical explosion-proof measures, interrupts the detonation sequence when the safety mechanism is not disarmed, and is the core component for ensuring the safety of ammunition handling. Traditional security agencies often rely on environmental forces to move the explosion-proof components to achieve state transitions, but their disarming action is usually a one-way, irreversible, "one-time" design. In situations such as mission cancellation, dud ammunition recovery, or malfunctioning ammunition disposal, the fuse, already in a ready-to-fire state and unable to be reset, poses a serious risk of self-detonation or accidental detonation, significantly threatening personnel safety and equipment reuse.
[0003] Therefore, it is necessary to invent a reversible internal and external rotation security mechanism to solve the above problems. Summary of the Invention
[0004] In order to solve the problem that the existing fuse security mechanism has a high risk of self-destruction or accidental detonation due to its one-way irreversibility, which poses a significant threat to personnel safety and equipment reuse, the present invention provides an internal and external rotation reversible security mechanism.
[0005] This invention is achieved using the following technical solution: A reversible security mechanism with internal and external rotation includes an outer rotating body and an inner rotating body; The outer rotating body includes a cylinder, a tube is connected through the center of the lower surface of the cylinder, a detonation hole I is opened through the bottom of the outer surface of the tube, and a pair of arc-shaped guide grooves are opened on the inner bottom wall of the cylinder, and the pair of arc-shaped guide grooves are symmetrically distributed at 180° along the axial center plane of the cylinder. The inner rotating body is in the shape of a stepped shaft, which includes a large-diameter section and a small-diameter section coaxially connected to the lower surface of the large-diameter section. A pair of arc-shaped sliders adapted to the arc-shaped guide groove are fixed on the lower surface of the large-diameter section. A hollow shaft is fixed at the center of the upper surface of the large-diameter section. A motor is connected to the top of the hollow shaft. A detonation hole II is opened through the bottom of the side of the small-diameter section.
[0006] Furthermore, the inner rotating body is inserted into the outer rotating body, and there are gaps between the side of the large-diameter section and the inner wall of the cylinder, between the lower surface of the large-diameter section and the inner bottom wall of the cylinder, between the side of the small-diameter section and the inner wall of the tube, between the left and right sides of the arc-shaped slider and the left and right inner walls of the corresponding arc-shaped guide groove, and between the bottom surface of the arc-shaped slider and the inner bottom wall of the arc-shaped guide groove.
[0007] Furthermore, the hollow shaft has a mounting hole on its side wall, and the motor's output shaft is inserted into the hollow shaft and fixedly connected by a pin inserted into the mounting hole.
[0008] This invention achieves reversible switching between a safe state and a deactivated state by driving an internal rotating body to rotate in both directions using a motor. This solves the risk of self-detonation or accidental detonation caused by the unidirectional irreversibility of traditional fuses. In the event of mission cancellation or malfunction, the fuse can be reset to a safe state, ensuring the safety of personnel and equipment. At the same time, the motor, in conjunction with the arc-shaped slider and arc-shaped guide groove, ensures accurate and reliable state switching. The gap design reduces friction and ensures smooth movement. In addition, the components are simple, assembly and maintenance are convenient, and it is suitable for various fuse scenarios, improving the reusability of equipment. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the overall structure of the present invention.
[0010] Figure 2 This is a schematic diagram of the structure of the outer rotating body in this invention.
[0011] Figure 3 This is a schematic diagram of the structure of the inner rotating body in this invention. Figure 1 .
[0012] Figure 4 This is a schematic diagram of the structure of the inner rotating body in this invention. Figure 2 .
[0013] Figure 5 This is a schematic diagram of the present invention in a safe state.
[0014] Figure 6 This is a schematic diagram of the present invention in the unlocked state.
[0015] In the diagram: 1. Cylinder; 2. Tube; 3. Detonation hole I; 4. Arc-shaped guide groove; 5. Large diameter section; 6. Small diameter section; 7. Arc-shaped slider; 8. Hollow shaft; 9. Mounting hole; 10. Mounting hole. Detailed Implementation
[0016] A reversible internal and external rotation security mechanism, as shown in the attached figure. Figure 1 ~Appendix Figure 4 As shown, it includes an outer body of revolution and an inner body of revolution; The outer rotating body includes a cylinder 1, a tube 2 is connected through the center of the lower surface of the cylinder 1, a detonation hole I3 is opened through the bottom of the outer surface of the tube 2, and a pair of arc-shaped guide grooves 4 are opened on the inner bottom wall of the cylinder 1, and the pair of arc-shaped guide grooves 4 are symmetrically distributed at 180° along the axial center plane of the cylinder 1. The inner rotating body is in the shape of a stepped shaft, which includes a large diameter section 5 and a small diameter section 6 coaxially connected to the lower surface of the large diameter section 5. A pair of arc-shaped sliders 7 adapted to the arc-shaped guide groove 4 are fixed on the lower surface of the large diameter section 5. A hollow shaft 8 is fixed at the center of the upper surface of the large diameter section 5. A motor is connected to the top of the hollow shaft 8. A detonation hole II9 is opened through the bottom of the side of the small diameter section 6.
[0017] The inner rotating body is inserted into the outer rotating body, and there are gaps between the side of the large diameter section 5 and the inner wall of the cylinder 1, between the lower surface of the large diameter section 5 and the inner bottom wall of the cylinder 1, between the side of the small diameter section 6 and the inner wall of the tube 2, between the left and right sides of the arc-shaped slider 7 and the left and right inner walls of the corresponding arc-shaped guide groove 4, and between the bottom surface of the arc-shaped slider 7 and the inner bottom wall of the arc-shaped guide groove 4, so as to prevent friction between the inner rotating body and the outer rotating body when the inner rotating body rotates relative to the outer rotating body.
[0018] The hollow shaft 8 has a mounting hole 10 on its side wall. The output shaft of the motor is inserted into the hollow shaft 8 and fixedly connected by a pin inserted into the mounting hole 10.
[0019] During installation, first prepare a fuse body with a base, and pre-install detonation holes III on the base; then, fix the outer rotating body cylinder 1 to the fuse body's base with bolts, ensuring that the detonation holes I3 of the outer rotating body are aligned with the detonation holes III of the fuse body to form an initial alignment state; next, insert the inner rotating body into the outer rotating body, and fix the hollow shaft 8 of the inner rotating body to the motor's output shaft with a pin to ensure that the motor can drive the inner rotating body to rotate. The motor is pre-fixed to the fuse body with bolts. Finally, check to ensure that the gap between the inner and outer rotating bodies is within acceptable limits. The gaps are 1mm, meaning the gaps between the side of the large-diameter section 5 and the inner wall of the cylinder 1, the gap between the lower surface of the large-diameter section 5 and the inner bottom wall of the cylinder 1, the gap between the side of the small-diameter section 6 and the inner wall of the tube 2, the gap between the left and right sides of the arc-shaped slider 7 and the left and right inner walls of the corresponding arc-shaped guide groove 4, and the gap between the bottom surface of the arc-shaped slider 7 and the inner bottom wall of the arc-shaped guide groove 4 are all 1mm. At this time, between the inner rotating body and the outer rotating body, only the front end face of the arc-shaped slider 7 contacts the front inner wall of the corresponding arc-shaped guide groove 4, and the other parts do not contact each other, thus avoiding unnecessary friction and jamming.
[0020] Connect the controller to the motor electrically, and connect the power supply to both the controller and the motor electrically.
[0021] After installation, the detonation port II9 of the inner rotating body is offset by 90° from the detonation port I3 of the outer rotating body, and the reversible safety mechanism is in a safe state. Figure 5 As shown. The detonation sequence was interrupted to ensure the safety of the operation.
[0022] Transition from a secure state to an unlocked state: When the safety mechanism needs to be released, the controller controls the motor to rotate the inner rotating body 90° clockwise. As the inner rotating body rotates, the arc-shaped slider 7 moves along the guide trajectory of the arc-shaped guide groove 4 until the rear end face of the arc-shaped slider 7 contacts the rear inner wall of the arc-shaped guide groove 4. At this time, the detonation hole II9 of the inner rotating body, the detonation hole I3 of the outer rotating body, and the detonation hole III of the fuse body are completely aligned, the detonation sequence is connected, and the mechanism is in the released state. Figure 6 As shown, the fuse can detonate normally.
[0023] Restored from unprotected state to safe state: In the event of mission cancellation, dud recovery, or malfunction handling, the fuse needs to be reset. The controller then controls the motor to rotate the inner rotating body 90° counterclockwise. The arc-shaped slider 7 moves in the opposite direction along the guide trajectory of the arc-shaped guide groove 4 until the front end face of the arc-shaped slider 7 contacts the front inner wall of the arc-shaped guide groove 4. At this point, the detonation hole II9 of the inner rotating body and the detonation hole I3 of the outer rotating body are again offset by 90°, the detonation sequence is interrupted, and the mechanism returns to a safe state.
[0024] This invention, through its unique design and working principle, significantly improves the safety and reliability of the fuze system, as specifically demonstrated below: First, this invention achieves reversible switching between a safe state and a deactivated state by driving the internal rotating body to rotate in both directions using a motor. In the event of mission cancellation, dud ammunition recovery, or malfunctioning ammunition disposal, the fuse can be reset from the ready-to-fire state to the safe state, completely eliminating the risk of spontaneous or accidental detonation caused by the irreversibility of traditional fuse security mechanisms, significantly improving personnel safety and equipment reuse value.
[0025] Secondly, this invention employs a mechanical guiding structure consisting of a motor-driven arc-shaped slider 7 and an arc-shaped guide groove 4, ensuring precise rotation angles and accurate and reliable state transitions. Simultaneously, the clearance design reduces friction and jamming, resulting in smooth and stable movement and extending service life.
[0026] Furthermore, this invention effectively improves safety. In the safe state, the detonating holes are offset by 90° to completely cut off the detonation sequence, ensuring reliable explosion protection; in the deactivated state, the detonating holes are aligned, and the detonation sequence is connected. The reversible conversion mechanism allows for multiple tests and resets, reducing the risk of accidents during operation and meeting modern fuse safety standards.
[0027] In the description of this invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A reversible internal and external rotation security mechanism, characterized in that: Includes external and internal bodies of revolution; The outer rotating body includes a cylinder (1), a tube (2) is connected through the center of the lower surface of the cylinder (1), a detonation hole I (3) is opened through the bottom of the outer surface of the tube (2), and a pair of arc-shaped guide grooves (4) are opened on the inner bottom wall of the cylinder (1), and the pair of arc-shaped guide grooves (4) are symmetrically distributed at 180° along the axial center plane of the cylinder (1). The inner rotating body is in the shape of a stepped shaft, which includes a large diameter section (5) and a small diameter section (6) coaxially connected to the lower surface of the large diameter section (5). A pair of arc-shaped sliders (7) adapted to the arc-shaped guide groove (4) are fixed on the lower surface of the large diameter section (5). A hollow shaft (8) is fixed at the center of the upper surface of the large diameter section (5). A motor is connected to the top of the hollow shaft (8). A detonation hole II (9) is opened through the bottom of the side of the small diameter section (6).
2. The reversible internal and external rotation security mechanism according to claim 1, characterized in that: The inner rotating body is inserted into the outer rotating body, and there are gaps between the side of the large diameter section (5) and the inner wall of the cylinder (1), between the lower surface of the large diameter section (5) and the inner bottom wall of the cylinder (1), between the side of the small diameter section (6) and the inner wall of the tube (2), between the left and right sides of the arc-shaped slider (7) and the left and right inner walls of the corresponding arc-shaped guide groove (4), and between the bottom surface of the arc-shaped slider (7) and the inner bottom wall of the arc-shaped guide groove (4).
3. The reversible internal and external rotation security mechanism according to claim 1, characterized in that: The hollow shaft (8) has a mounting hole (10) on its side wall. The output shaft of the motor is inserted into the hollow shaft (8) and fixedly connected by a pin inserted into the mounting hole (10).