RU2261409C1 - Rocket launcher - Google Patents

Abstract

FIELD: weapons.

SUBSTANCE: rocket launcher comprises, contact box, and breech piece with electric contacts and axle for locking firing provided with plank. The contact box has an opening for receiving axle. The axle is provided with U-shaped levers having openings at different distances from the axis of rotation depending on the position of the electric contacts in the breech piece. Openings receive isolation bushing. The opening in the isolation bushing receives the contact with the isolation washer. The electric wire is interposed between the washer and fastening member of the contact. The levers receive axially aligned screw springs whose one ends co-operate with the lever and other ends co-operate with the contact box to produce the moment that provide contact pressure in the electric contacts. The groove of the locking axle of the firing receives plank provided with projection from one side for interaction with the levers. The projecting section of the plank is made for permitting interaction with the lever. The plank is made of a metal.

EFFECT: simplified structure, reduced sizes, and enhanced reliability.

1 cl, 4 dwg

Description

The invention relates to military equipment, and more particularly to grenade launchers.

Known grenade launcher МРГ - I, taken as a prototype (see 1) Magazine "Arms" No. 6-8 for 1990, C 2-8; 2) a description of the invention to patent RU 2792600, F 41 C 27/06, 10/10/2002, bull. No. 31, count.5, line 6, count.9, line 1; 3) directory "Small arms" Minsk, 1997, OOO "Potpourri" S 338). The grenade launcher contains a barrel, a contact box, a breech block with electrical contacts and an axis for locking the firing chain, on which an insulating strip is fixed. In the cover of the contact box, connected to the housing of the contact box and fixed in the breech of the barrel, plate contact springs interacting with the insulating strip are rigidly fixed.

The disadvantages of the grenade launcher MRG - I are:

1. To ensure contact pressure on the electrical contacts during operation under vibration and shock loads and the limited size of the internal cavity of the contact box, plate contact springs have working stresses close to the plastic deformation zone, and often inside this zone, which occurs when lifting them with a bar the axis of the firing chain lock while ensuring a guaranteed clearance between the plate contact springs and the electrical contacts during loading. This leads to failure of the electrical contact device and, as a consequence, a grenade launcher, since the plate contact spring does not interact with the electrical contact when lowering the bar of the axis of locking the firing circuit.

2. A large angle of rotation of the axis of locking the chain of fire from the position allowed for shooting to break the electric circuit between the plate contact springs and electrical contacts, as well as when turning in the opposite direction, reduces the rate of fire due to an increase in loading time.

3. The complexity of the design of plate contact springs, which to provide insulation protection include plastic materials in their design.

4. The execution of the bar axis of the locking chain of the firing chain only of dielectric materials, in particular plastic, causes its deformation and rapid wear when interacting with plate contact springs, which leads to insufficient lifting of the bar axis of the locking chain of the firing chain. As a result, contact springs interact with electrical contacts, which can lead to the operation of the grenade during charging and to personal injury.

The proposed invention solves the problem: ensuring stable performance of the grenade launcher.

The technical result obtained by the implementation of the invention is as follows: simplification of design, reduction of dimensions, increased reliability.

The specified technical result is achieved in that in a grenade launcher containing a barrel, a contact box, a breech block with electrical contacts and an axis for locking the firing chain, with a bar fixed on it, new is that in the contact box there is a hole in which the axis is mounted on the axis of the landing holes are installed U-shaped levers, on each of which at a different distance from the axis of rotation, depending on the position of the electrical contacts in the breech, a hole is made in which the insulating sleeve is placed, in the hole and the insulating sleeve, contact is made with the insulating washer, an electric wire is fixed between the washer and the fastening element of the contact, inside the levers on the axis there are screw springs interacting at one end with the lever and the other end with the contact box to create a moment providing contact pressure on the electrical contacts, the groove of the axis of locking the chain of fire is fixed with a protrusion on one side of the bar for interaction with levers, and the protruding part of the bar is made for interaction with a lever having A shorter distance from the axis of rotation to the axis of the bore for the insulating sleeve.

The grenade launcher is made with a metal strap.

Distinctive features of the invention is: a new form of execution of structural elements, a new form of communication between structural elements. The spring-loaded levers with contacts are arranged to rotate them on the axis, which ensures the operation of the levers in the zone of elastic deformation and reduces the size of the contact box. Installation with a protrusion on one side of the bar on the axis of the locking chain of the firing provides a smaller angle of rotation of the axis of the block from one fixed position to another, and the implementation of the bar of metal provides less wear. The levers with the contacts installed in them, an insulating sleeve and a washer simplify the design compared to the prototype, in which the manufacture of plate contact springs, including plastic materials in their design, requires the creation of complex molds.

The invention is illustrated by drawings, where

figure 1 shows a General view of a grenade launcher;

figure 2 shows a section aa in figure 1 along the axis of rotation of the levers;

figure 3 shows a view;

figure 4 shows a section bB in figure 3.

The grenade launcher contains a barrel 1, on which a breech 2 is mounted on a threaded surface, fixed by a screw 3. A contact box, which includes a housing 4 and a cover 5, is installed in the breech and fixed in it by a retainer 6. To fix the grenade in the barrel, a stopper is installed in the breech 7. Between the stopper 7 and the latch 6, a spring 8 is installed, interacting at one end with the stopper, and the other with the latch. An axis 9 is installed in the opening of the housing 4 of the contact box. U-shaped levers are installed on the axis 10. On the axis 9, a washer 11 is mounted between the arms. Inside the arms 10, coil springs 12 are mounted on the axis, which interact at one end with the housing 4 of the contact box, and another - with a lever to create a moment that provides contact pressure on the electrical contacts.

In each of the levers at different distances from the axis of rotation, depending on the position of the electrical contacts 13 installed in the breech, a hole is made in which an insulating sleeve 14 is installed, in the hole of which is placed a contact 15 with an insulating washer 16 worn on it. Between the insulating washer and the fastening the contact element 15 is fixed to the wire 17, which passes through the longitudinal groove of the lever to the power source.

In breech 2 there is a through hole in which the firing chain locking axis 18 is installed, which when turning has two fixed positions, one of which is to provide power to the firing circuit at the electrical contacts 13, and the other is a guaranteed gap between the T5 contacts installed in the levers 10, and electrical contacts 13 installed in the breech 2.

In the groove of the axis 18 of the locking of the firing chain, a metal bar 19 is mounted with a protrusion on one side for interaction with levers, the protruding part of the bar being made to interact with the lever with a shorter distance from the axis of rotation to the axis of the hole for the insulating sleeve 14.

The machine gun is loaded in the following sequence.

In the breech 2 rotate the axis 18 of the locking of the firing chain from one fixed position, in which the levers 10 through the contacts 15 under the action of the coil springs 12, creating contact pressure, interact with the electrical contacts 13, in another fixed position, in which the bar 19, interacting with the levers, raises them above the electrical contacts and provides approximately the same guaranteed clearance between the contacts of the levers and the electrical contacts interacting with them.

Next, raise the stopper 7, compressing the spring 8 and insert the grenade 20 (see figure 1) into the breech 2 and the barrel 1, while the grenade with its locking protrusions abuts against the annular shoulder of the breech. After that, the stopper 7 is released and it comes under the action of the spring 8 behind the end face of the grenade. Grenade 20 is in a fixed position in the barrel 1 and breech 2.

To bring the grenade launcher to the firing position for firing, the firing chain locking axis 18 is rotated to a fixed position in which, under the action of the coil springs 12, the levers 10 rotate and the contacts 15 interact with the electrical contacts 13, and a guaranteed clearance is formed between the levers and the strap 19. The grenade launcher is ready to fire. When applying power through the contacts 15 to the electrical contacts 13 and then to the contact rings of the grenade 20, a grenade is shot.

Claims (2)

1. A grenade launcher comprising a barrel, a contact box, a breech block with electrical contacts and an axis for locking the firing chain with a bar fixed on it, characterized in that a hole is made in the contact box in which the axis is mounted, U-shaped levers are mounted on the axis with mounting holes, each of which, at a different distance from the axis of rotation, depending on the position of the electrical contacts in the breech, has a hole in which the insulating sleeve is placed, in the hole of the insulating sleeve a contact with the insulating th washer, an electric wire is fixed between the washer and the fastening element of the contact, inside the levers on the axis there are coil springs interacting at one end with the lever and the other end with the contact box to create a moment that provides contact pressure on the electrical contacts, in the groove of the axis of the firing chain lock is fixed with a protrusion on one side of the bar for interacting with levers, the protruding part of the bar being made to interact with a lever having a shorter distance from the axis of rotation to the axis of the hole for lation sleeve. 2. Grenade launcher according to claim 1, characterized in that the bar is made of metal.

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