CN112964140B

CN112964140B - Detonator dish spring recoil firing mechanism

Info

Publication number: CN112964140B
Application number: CN202110327603.2A
Authority: CN
Inventors: 王雨时; 彭启蒙
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2022-06-28
Anticipated expiration: 2041-03-26
Also published as: CN112964140A

Abstract

The invention discloses a detonator recoil ignition mechanism which comprises a disc spring, a firing pin, a pressing ring, a fire cap and a fire cap seat which are coaxially arranged. The firing pin is fixedly connected with the disc-shaped spring, the disc-shaped spring is arranged between the pressing ring and the fire cap seat, and the accidental falling environment and the normal launching environment are identified through the spring characteristic of the disc-shaped spring. When the fire fighting cap is in an accidental falling environment, the deformation generated by the disc spring due to falling overload does not pass through the disc spring overturning plane, the firing pin cannot stab the fire fighting cap, and the disc spring and the firing pin on the disc spring can recover the original position after the falling overload disappears, so that the safety is ensured; when the projectile is normally launched, the inner conical surface of the disc-shaped spring and the firing pin on the disc-shaped spring cross the overturning plane under the action of launching overload, and the disc-shaped spring overturns downwards, so that the firing pin punctures the firing cap to finish firing. The fuse disc spring recoil ignition mechanism provided by the invention is suitable for high-emission overload occasions with slightly large radial dimension and small axial dimension, and has the advantages of simple structure, high safety and low cost.

Description

Detonator dish spring recoil firing mechanism

Technical Field

The invention belongs to the fuse technology, and particularly relates to a fuse disc spring recoil ignition mechanism.

Background

To date, fuze recoil ignition mechanisms have all been needle-prick ignition mechanisms. The traditional fuse recoil ignition mechanism uses a cylindrical helical compression spring as a safety piece, and occasionally a rigid resistance piece is used as the safety piece. Since the recoil trigger mechanism requires the firing pin to be guided (generally, the guide length is considered to be more than 3 times of the diameter) when the recoil trigger mechanism is fired, the recoil trigger mechanism often requires a larger axial dimension of the fuse.

Landmines are explosively hindered weapons, usually deployed underground or on the ground to kill enemies and destroy their weapons, and thus require concealment and agility. The disc spring is a disc washer type nonlinear elastic element which is formed by punching a steel strip (or made of other elastic materials) and has negative rigidity, the radial dimension of the disc spring is larger than the axial dimension of the disc spring, the disc spring is mainly used for bearing axial load, can bear the axial load with large range change under the condition of small deformation, and has better buffering and shock-absorbing capacity. The disk spring is used as a resistance part of the mine fuse ignition mechanism, the axial size of the mine fuse can be effectively reduced, and therefore the overall axial size of the mine is reduced, and the miniaturization of the mine is achieved, and the concealment of the mine is improved. The spring characteristic of the disc spring enables the disc spring to correctly identify an accidental falling environment and a normal launching environment, and the safety is improved. In the past, all mines using disc spring ignition mechanisms are pressure-type mines needing manual arrangement, the required pressure is high, and the structure is complex, such as an M606 anti-tank mine.

Disclosure of Invention

The invention aims to provide a detonator disk spring recoil ignition mechanism, which effectively reduces the axial dimension of a detonator and realizes the miniaturization of the detonator.

The technical solution for realizing the purpose of the invention is as follows: a fuse disc spring recoil ignition mechanism is suitable for a high-emission overload environment and comprises a pressing ring, a disc spring, a fire cap seat, a firing pin and a fire cap which are coaxially arranged; the fire cap is arranged at the center of the bottom of the fire cap seat, and the firing pin is aligned with the fire cap.

The fire cap base is a bowl-shaped cavity protruding downwards, the bottom surface of the fire cap base is a plane, the fire cap is fixed at the center of the bottom surface, a circle of clamping grooves are formed in a bowl opening, the outer edge of the disc-shaped spring is arranged on the clamping grooves, meanwhile, the disc-shaped spring protrudes upwards, a closed space is formed between the disc-shaped spring and the bowl-shaped cavity, and the axial distance of the closed space is used as the stroke of the firing pin.

Compared with the prior art, the invention has the following remarkable advantages:

(1) the disc spring is used as a resistance part of the fuse recoil ignition mechanism, so that the movement guiding size of the firing pin is saved, the occupation of the axial space in the fuse can be reduced, the structure is simple, and the cost is low.

(2) The device is suitable for high-launching overload occasions with smaller axial size and larger radial size, such as a shell fuse.

Drawings

Fig. 1 shows a schematic structural view of a fuse disc spring recoil ignition mechanism of the present invention in an assembled state.

Fig. 2 is a schematic structural view of the fuze disc spring recoil ignition mechanism of the present invention in an ignition state.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

With reference to fig. 1, the fuse disc spring recoil ignition mechanism provided by the invention is used for reducing the axial size of a fuse and realizing the miniaturization of the fuse, and comprises a pressing ring 1, a disc spring 2, a fire cap seat 3, a firing pin 4 and a fire cap 5 which are coaxially arranged. The firing pin 4 is fixedly connected to the center of the disc-shaped spring 2, the outer edge of the disc-shaped spring 2 is arranged on the fire cap base 3, the upper portions of the firing pin 4 and the disc-shaped spring 2 extend into a central hole of the pressing ring 1, the outer edge of the pressing ring 1 is clamped into the fire cap base 3 and pressed on the outer edge of the disc-shaped spring 2, axial movement of the disc-shaped spring 2 is not affected, the fire cap 5 is arranged at the center of the bottom of the fire cap base 3, and the firing pin 4 is aligned to the fire cap 5.

The striker 4 is fixed in the center of the disc spring 2, a circle of first bosses which can move along the radial direction are arranged on the outer edge of the bottom of the disc spring 2 and serve as the outer edge to play a supporting role, and the disc spring 2 is manufactured in an integrated forming mode. The pressing ring 1 is cylindrical, a circle of second boss is arranged on the outer wall of the bottom of the pressing ring and used as an outer edge, the second boss is clamped into the fire cap seat 3 and pressed on the outer edge of the disc spring 2, and a chamfer is formed in the bottom of the central hole wall of the second boss and used for being matched with the disc spring 2. The second boss is used for accommodating and fixing the disc spring 2 and providing bottom support for the disc spring 2 after ignition. The fire cap seat 3 is a bowl-shaped cavity protruding downwards, the bottom surface of the fire cap seat is a plane, the fire cap 5 is fixed at the center of the bottom surface, a circle of clamping groove is formed in a bowl opening, the outer edge of the disc-shaped spring 2 is arranged on the clamping groove, meanwhile, the disc-shaped spring 2 protrudes upwards, a closed space is formed between the closed space and the bowl-shaped cavity, the axial distance of the closed space is used as the stroke of the striking pin 4, and the inner wall of the bowl-shaped cavity does not influence the movement of the disc-shaped spring 2.

With reference to fig. 1 and 2, when the fuze belleville spring recoil ignition mechanism of the present invention is in an assembled state, the firing pin 4 is spaced from the primer cap 5. When the projectile or the fuse is in an unexpected falling state in the service treatment stage, the outer edge circumference of the disc spring 2 expands outwards slightly, the inner edge circumference contracts downwards slightly, the section cone angle becomes small, the inner cone height becomes low, and the firing pin 4 is close to the fire cap 5. But the axial deformation of the disc spring 2 caused by falling overload can not exceed the overturning plane of the disc spring, and the disc spring 2 and the striker 4 on the disc spring can be restored to the original position after the falling overload disappears, thereby ensuring the safety. As shown in fig. 2, when the projectile is in a normal launching environment, the fuze belleville spring recoil ignition mechanism is under the action of high launching overload, the truncated cone shape of the belleville spring 2 can be overturned over the overturning plane, so that the firing pin 4 rapidly pokes the firing cap 5 to complete the ignition.

Claims

1. The utility model provides a mechanism is fired to detonator dish spring recoil which characterized in that: the fire-fighting overload protection device is suitable for a high-emission overload environment and comprises a pressing ring (1), a disc-shaped spring (2), a fire cap seat (3), a firing pin (4) and a fire cap (5) which are coaxially arranged; the fire cap is characterized in that a firing pin (4) is fixedly connected to the center of a disc-shaped spring (2), the outer edge of the disc-shaped spring (2) is arranged on a fire cap seat (3), the upper parts of the firing pin (4) and the disc-shaped spring (2) extend into a central hole of a pressing ring (1), the outer edge of the pressing ring (1) is clamped into the fire cap seat (3) and pressed on the outer edge of the disc-shaped spring (2), axial movement of the disc-shaped spring (2) is not influenced, a fire cap (5) is arranged at the center of the bottom of the fire cap seat (3), and the firing pin (4) is aligned with the fire cap (5);

The fire cap seat (3) is a bowl-shaped cavity protruding downwards, the bottom surface of the fire cap seat is a plane, the fire cap (5) is fixed in the center of the bottom surface, a circle of clamping grooves are formed in a bowl opening, the outer edge of the disc-shaped spring (2) is arranged on the clamping grooves, meanwhile, the disc-shaped spring (2) protrudes upwards, a closed space is formed between the disc-shaped spring and the bowl-shaped cavity, and the axial distance of the closed space is used as the stroke of the firing pin (4);

a circle of second bosses are arranged on the outer wall of the bottom of the pressing ring (1) and used as outer edges, and the second bosses are clamped into the fire cap seat (3) and pressed on the outer edges of the disc springs (2);

the pressing ring (1) is cylindrical, and the bottom of the central hole wall of the pressing ring is provided with a chamfer angle for matching with the disc spring (2);

a circle of first bosses which can move along the radial direction are arranged on the bottom surface of the outer wall of the disc spring (2) and are used as the outer edge of the disc spring (2);

the recoil ignition mechanism identifies an accidental falling environment and a normal launching environment through the spring characteristic of the disc spring (2), does not need to specially set motion guide, and is suitable for high launching overload occasions with larger radial dimension and smaller axial dimension;

when the projectile falls accidentally, the axial deformation of the disc spring (2) caused by falling overload cannot cross the overturning plane of the disc spring, and after the falling overload disappears, the disc spring (2) and the striker (4) on the disc spring are restored to the original position, so that the safety is ensured; when the projectile is in a normal launching environment, the detonator disc spring recoil ignition mechanism is under the action of high launching overload, and the truncated cone shape of the disc spring (2) can cross the overturning plane to overturn, so that the firing pin (4) rapidly pokes the firing cap (5) to complete ignition.