Modularized inertial electric safety device

Abstract

The modular inertial electric safety device comprises a columnar shell, an electromagnetic locking mechanism, a sleeve and a guide pin are coaxially arranged in the shell, the electromagnetic locking mechanism is fixedly connected with the shell, an opening is formed in the bottom of the sleeve, and the sleeve is slidably connected with the shell; the guide pin is arranged in the sleeve in a sliding mode, a compression spring is arranged between the guide pin and the sleeve, the trigger end of the guide pin can extend out of the bottom face of the shell in a sliding mode, and locking and resetting of the position are achieved through cooperation of the shell, the electromagnetic locking mechanism, the sleeve and the compression spring. The electric safety device can utilize a combined environment of power supply signals and inertia overload to relieve safety, can meet the requirement of modular design, can be universally installed in fuses of different types, and has the advantages of being simple in structure and high in reliability.

Description

Technical Field

[0001] The invention relates to the technical field of fuze inertia insurance, in particular to a modular inertia electric insurance device. Background Art

[0002] In the initial stage after the rocket engine is ignited, a certain overload environment will be generated. According to the requirements of GJB373B-2019 "Fuze Safety Design Guidelines": At least one independent safety device should be provided to release the safety, which depends on the environment after the initial movement during the launch cycle or the launch environment. Therefore, when designing a fuze, there is usually an inertial safety device that can be released using the inertial environment generated by the overload of the rocket. However, relying solely on the overload environment will reduce the safety of the system and may cause accidental release of the safety. For example, an accidental fall during service handling or sudden braking during transportation may cause an overload environment due to a large impact, causing the fuze inertial safety to be accidentally released.

[0003] In order to improve the safety of the inertial insurance, a control mechanism can be added to form an "insurance mechanism" together with the inertial insurance. During the service phase, the control mechanism can lock the inertial insurance to ensure its safety. After the rocket is launched and the overload conditions are met, the control mechanism is opened to release the constraints on the inertial insurance. However, the control mechanism and the inertial insurance are two separate devices. Installing the two separate devices in the fuze body at the same time will increase the volume occupied by the insurance mechanism and does not meet the design requirements of "standardization, modularization, and serialization". Summary of the invention

[0004] In response to the above technical problems, the present invention proposes a modular inertial electrical safety device, which can utilize the combined environment of "power supply signal + inertial overload" to release the safety, and can meet the requirements of modular design. It can be universally installed in various types of fuses and has the advantages of simple structure and high reliability.

[0005] A modular inertial electrical safety device comprises a cylindrical shell, wherein an electromagnetic locking mechanism, a sleeve and a guide pin are coaxially arranged in the shell, wherein the electromagnetic locking mechanism is fixedly connected to the shell, the sleeve has an opening at the bottom and is slidably connected to the shell, the guide pin is slidably arranged in the sleeve and a compression spring is arranged between the guide pin and the sleeve, and the trigger end of the guide pin can slide out of the bottom surface of the shell and the position is locked and reset through the cooperation of the shell, the electromagnetic locking mechanism, the sleeve and the compression spring.

[0006] As a preferred embodiment of the above technical solution, a guide column is provided on the guide pin perpendicular to its axis, a strip guide hole is provided on the side of the sleeve parallel to its axis, and an arc guide hole 1 is symmetrically provided on the outer facade of the shell, and the guide column passes through the strip guide hole and the arc guide hole 1 successively. Under the limiting action of the strip guide hole and the arc guide hole 1, the guide pin will perform a spiral upward or spiral downward motion in the sleeve under the action of external force.

[0007] As a preferred embodiment of the above technical solution, a group of positioning columns are symmetrically provided on the bottom surface of the sleeve, and a group of locking holes used in conjunction with the positioning columns are symmetrically provided on the bottom surface of the shell. In the initial state, the locking tongue of the electromagnetic locking mechanism presses against the sleeve until the positioning columns are inserted into the locking holes.

[0008] As a preferred embodiment of the above technical solution, a group of arc-shaped guide holes 2 are symmetrically provided on the bottom surface of the shell. After the guide pin spirally descends to the bottom surface of the shell, the positioning column is inserted into the arc-shaped guide hole 2 and can continue to rotate around the arc-shaped guide hole 2.

[0009] As a preferred embodiment of the above technical solution, the guide pin is a stepped shaft, a positioning groove is provided on the top of the guide pin, one end of the compression spring is limited in the positioning groove, and the other end is pressed against the sleeve.

[0010] As a preferred embodiment of the above technical solution, the top of the shell is open, and the guide pin, compression spring, sleeve and electromagnetic locking mechanism are successively assembled in the shell.

[0011] As a preferred embodiment of the above technical solution, the guide column vertically penetrates the guide pin.

[0012] As a preferred embodiment of the above technical solution, the electromagnetic locking mechanism is threadedly connected to the housing.

[0013] The beneficial effects of the present invention are:

[0014] 1. Utilizing the combination of "power supply signal + inertial overload", it is necessary to control the dual constraints of the system power supply and the ballistic conditions of the rocket flight to improve the safety of release.

[0015] 2. The present invention skillfully integrates the control mechanism and the inertia insurance into one device, and adopts a modular design. When debugging and testing the device, it does not need to be installed in the fuze, and can be tested and debugged independently of the fuze. When the debugging is qualified, it can be installed in the fuze, and no verification is required after installation, which can greatly improve the efficiency of inertia insurance debugging.

[0016] 3. Since the device adopts modular design, it is easy to process and produce in a standardized manner, and can be designed in batches to meet the development needs of "standardization, modularization, and serialization" of mechanical design. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 It is a top view of the present invention.

[0019] Figure 3 for Figure 2 Middle AA section view (initial state).

[0020] Figure 4 for Figure 2 Middle BB section view (initial state).

[0021] Figure 5 This is a schematic diagram of the structure of the power-on safety device after it is energized.

[0022] Figure 6 It is a schematic diagram of the structure of the power-on safety device after the guide pin is overloaded.

[0023] Figure 7 It is a schematic diagram of the structure after the power-on safety device is powered on again.

[0024] Figure 8 This is a bottom view of the power-on safety device after it is powered on again.

[0025] Fig. 9 It is a schematic diagram of the assembly structure of the inertial electric safety device, the fuze body and the isolation device of the present invention.

[0026] The figures are marked as follows: 1-housing, 2-electromagnetic locking mechanism, 3-sleeve, 4-guide pin, 5-compression spring, 6-guide column, 7-strip guide hole, 8-arc-shaped guide hole one, 9-positioning column, 10-locking hole, 11-arc-shaped guide hole two, 12-positioning groove, 13-fuze body, 14-lead wire, 15-isolating device. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 4A modular inertial electrical safety device is shown, comprising a cylindrical shell 1, in which an electromagnetic locking mechanism 2, a sleeve 3 and a guide pin 4 are coaxially arranged, the electromagnetic locking mechanism 2 is fixedly connected to the shell 1, the sleeve 3 has an opening at the bottom and is slidably connected to the shell 1, the guide pin 4 is slidably arranged in the sleeve 3 and a compression spring 5 is arranged between the sleeve 3, the trigger end of the guide pin 4 can slide out of the bottom surface of the shell 1 and the position is locked and reset through the cooperation of the shell 1, the electromagnetic locking mechanism 2, the sleeve 3 and the compression spring 5.

[0029] In this embodiment, a guide column 6 is provided on the guide pin 4 perpendicular to its axis, a strip guide hole 7 is provided on the side of the sleeve 3 parallel to its axis, and an arc guide hole 8 is symmetrically provided on the outer facade of the shell 1. The guide column 6 passes through the strip guide hole 7 and the arc guide hole 8 in sequence. Under the limiting action of the strip guide hole 7 and the arc guide hole 8, the guide pin 4 will perform a spiral upward or spiral downward motion in the sleeve 3 under the action of external force.

[0030] In this embodiment, a group of positioning columns 9 are symmetrically provided on the bottom surface of the sleeve 3, and a group of locking holes 10 used in conjunction with the positioning columns 9 are symmetrically provided on the bottom surface of the shell 1. In the initial state, the locking tongue of the electromagnetic locking mechanism 1 presses against the sleeve 3 until the positioning columns 9 are inserted into the locking holes 10.

[0031] In this embodiment, a group of arc-shaped guide holes 11 are symmetrically provided on the bottom surface of the shell 1. After the guide pin 4 spirally descends to the bottom surface of the shell 1, the positioning column 9 is inserted into the arc-shaped guide hole 11 and can continue to rotate around the arc-shaped guide hole 11.

[0032] In this embodiment, the guide pin 4 is a stepped shaft, a positioning groove 12 is provided on the top of the guide pin 4 , one end of the compression spring 5 is limited in the positioning groove 12 , and the other end is pressed against the sleeve 3 .

[0033] In this embodiment, the top of the housing 1 is open, and the guide pin 4 , the compression spring 5 , the sleeve 3 and the electromagnetic locking mechanism 2 are successively assembled in the housing 1 .

[0034] In this embodiment, the guide column 6 vertically penetrates the guide pin 4 .

[0035] In this embodiment, the electromagnetic locking mechanism 2 is threadedly connected to the housing 1 .

[0036] The working principle of this embodiment is as follows.

[0037] The initial state is Figure 3 , Figure 4As shown, the locking tongue of the electromagnetic locking mechanism 2 presses against the sleeve 3, and the positioning column 9 is inserted into the locking hole 10 at the bottom of the housing 1. At this time, the guide pin 4 cannot rotate, that is, the rotational movement is constrained, so the guide pin 4 cannot move along the axial direction;

[0038] After the electromagnetic locking mechanism 2 is energized, the electromagnetic locking mechanism 2 retracts the lock tongue, and the sleeve 3 is pushed upward under the resistance of the compression spring 5. When the positioning column 9 is pushed out of the locking hole 10, the constraint on the rotation of the guide pin 4 is released. However, under the support of the downward force of the compression spring 5, the guide pin 4 maintains its initial state unchanged, and the sleeve 3 slides vertically upward to the position shown in FIG. Figure 5 The status shown;

[0039] When the electric safety device is subjected to inertial overload, the guide pin 4 will move upward in a spiral along the axial direction under the overload, and the trigger end of the guide pin 4 will retract into the inside of the safety device, releasing the external constraint and realizing the release of the safety device. In this process, the sleeve 3 will rotate a certain angle with the guide pin 4 and move to the position as shown in the figure. Figure 6 The status shown;

[0040] After the electromagnetic locking mechanism 2 is powered off again, the lock tongue of the electromagnetic locking mechanism 2 pops out, pressing the sleeve 3 downward, inserting the positioning column 9 at the bottom of the sleeve 3 into the arc-shaped positioning hole 11 at the bottom of the shell 1. At this time, the shell 1, the sleeve 3 and the guide pin 4 form an interlocking, that is, the sleeve 3 cannot rotate in the opposite direction around the axis, and the guide pin 4 cannot make a spiral lifting movement, so that the safety device as a whole is in an unlocked and locked state. Figure 7 , Figure 8 shown.

[0041] Fig. 9 The schematic diagram of the assembly structure of the inertial electric safety device, the fuse body and the isolation device shows that the device can be directly threaded and fastened in the fuse body 13. The lead wire 14 of the inertial electric safety device extends out of the fuse body, and the guide pin 4 lock is extended at the end of the device to lock the isolation device 15. After the inertial electric safety device is powered, the constraint on the guide pin 4 is released. After the guide pin 4 is affected by the overload environment generated at the beginning of the launch cycle, it retracts into the inertial electric safety device, thereby releasing the constraint on the isolation device 15. This process meets the environmental requirements of the safety device in GJB373B-2019 that the release of the safety device depends on the initial movement of the launch cycle.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A modular inertial electric fuse device, characterized in that: It comprises a cylindrical shell, in which an electromagnetic locking mechanism, a sleeve and a guide pin are coaxially arranged, the electromagnetic locking mechanism is fixedly connected to the shell, the bottom of the sleeve is open and is slidably connected to the shell, the guide pin is slidably arranged in the sleeve and a compression spring is arranged between the sleeve, the trigger end of the guide pin can slide out of the bottom surface of the shell and the position is locked and reset through the cooperation of the shell, the electromagnetic locking mechanism, the sleeve and the compression spring.

2. A modular inertial electrical fuse device according to claim 1, characterized in that: A guide column is provided on the guide pin perpendicular to its axis, a strip guide hole is provided on the side of the sleeve parallel to its axis, and an arc guide hole 1 is symmetrically provided on the outer facade of the shell. The guide column passes through the strip guide hole and the arc guide hole 1 successively. Under the limiting action of the strip guide hole and the arc guide hole 1, the guide pin will perform a spiral upward or spiral downward motion in the sleeve under the action of external force.

3. A modular inertial electrical fuse device according to claim 2, characterized in that: A group of positioning posts are symmetrically provided on the bottom surface of the sleeve, and a group of locking holes used in conjunction with the positioning posts are symmetrically provided on the bottom surface of the shell. In an initial state, the locking tongue of the electromagnetic locking mechanism presses against the sleeve until the positioning posts are inserted into the locking holes.

4. A modular inertial electrical fuse device according to claim 3, characterized in that: A set of arc-shaped guide holes 2 are symmetrically arranged on the bottom surface of the shell. After the guide pin spirally descends to the bottom surface of the shell, the positioning column is inserted into the arc-shaped guide hole 2 and can continue to rotate around the arc-shaped guide hole 2.

5. A modular inertial electric fuse device according to claim 1, characterized in that: The guide pin is a stepped shaft, a positioning groove is provided on the top of the guide pin, one end of the compression spring is limited in the positioning groove, and the other end is pressed against the sleeve.

6. A modular inertial electrical fuse device according to claim 1, characterized in that: The top of the shell is open, and the guide pin, compression spring, sleeve and electromagnetic locking mechanism are successively assembled in the shell.

7. A modular inertial electrical fuse device according to claim 6, characterized in that: The guide column vertically penetrates the guide pin.

8. A modular inertial electrical fuse device according to claim 6, characterized in that: The electromagnetic locking mechanism is threadedly connected to the housing.

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