RU2488765C1 - Anti-ricochet and anti-fragmentation protection of living or cargo compartment - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: anti-ricochet and anti-fragmentation protection comprises a frame, outer (1) and inner (6) protections installed on it. The inner protection (6) is fixed to the frame by means of a cord pulled via eyelets on the protection and brackets on the frame. The inner protection (6) comprises a composition of sheets of crease-resistance (8) and energy-absorbing (9) materials. The energy-absorbing material is ultra-high molecular polyethylene, Kevlar, glass-cloth-base laminate and other materials with high impact strength.

EFFECT: reduction of damage from penetration before exploding, retention of a larger part of fragments and prevention of bullet ricochet against inner walls of a compartment due to joint usage of external protection, crease-resistance and energy-absorbing materials.

5 cl, 6 dwg

Description

The invention relates to the field of anti-ricochet and anti-fragmentation protection of vehicles and stationary objects.

Known anti-ricochet and anti-fragmentation protection of vehicles by attaching armor plates on their spatial frame (RF patent No. 2082634, IPC B60R 21/12, publ. 06/27/1997).

A disadvantage of the known technical solution is the large negative armor effect, which consists in significant damage to the inhabitants and equipment inside the compartment as a result of repeated rebound and a large torch of fragments. In the absence of external armor protection, 1-2 people could be defeated; if it is, penetration of a bullet from one of the armored barriers, as a rule, leads to 100% damage to personnel.

Known anti-ricochet and anti-fragmentation protection, made in the form of multilayer armor, in which the layers are spaced apart from each other (USSR copyright certificate No. 66138, publ. 04/30/1946).

The disadvantages of the analogue are also a significant weighting of the structure, since all layers of protection are made of armor, and in the above technical solutions the task is to prevent the penetration of bullets and fragments into the inhabited compartment.

Known anti-ricochet and anti-fragmentation protection, made inside the armor barrier in the form of flexible stretchable armor cord (RU 2295464, published: 03/20/2007. Bull. No. 8, prototype).

The disadvantages of this invention are:

- extremely doubtful performance of flexible armor in terms of preventing bullet rebound, since it is unlikely that the damping system can guarantee the presence of a distance between the internal and external protections, as a necessary working condition for flexible armor. It is known that when a bullet is exposed to an obstacle, the obstacle bends and can choose the above distance, and what to say when the bullet is exposed to flexible armor on the opposite side - the damping system will provide even greater deflection of the obstacle. Flexible armor will not work if it rests on a rigid obstacle, a bullet can lose energy passing through several obstacles: when penetrating an armored obstacle, when passing flexible armor at the point of penetration of armor, when passing flexible armor at the opposite side, then at an armored obstacle after a rebound from her she must again return to flexible armor. Many manufacturers tried to reproduce the described scheme of the invention RU 2295464, however, these attempts were unsuccessful, since during the shelling there was no necessary distance between the external and internal protection;

- the anti-fragmentation effect is not ensured and for the same reason - if there is no distance between the external and internal protection, the system cannot physically work: the fragment torch has a certain angle of fragment fragmentation and in order for the main part to fall past the hole from the bullet, it is necessary to move the outer and internal protection from each other at the maximum possible distance (in figa two dashed lines show an increase in the area of fragments);

- the installation of internal protection with expensive non-moisture-resistant aramid fabrics increases the cost by a factor of one and reduces the resource for the general protection of the car;

- the use of the cord significantly affects the manufacturability and cost of installing the product on the object, as it requires the installation of a large number of brackets for attaching the cord;

mass welding of staples leads to the release and weakening of the external armor barrier.

The objective of the invention is:

creation of anti-ricochet and anti-fragmentation protection of the habitable or cargo compartment, eliminating the above disadvantages;

the use of low crease material, which ensures guaranteed preservation of the distance between the external protection and the proposed internal protection, multiplies its capabilities;

the use of new cheap energy-absorbing materials with unlimited service life;

the use of new methods for attaching internal protection by means of adhesive films and compositions, hook, strap, button, cord, hook and loop fasteners and others, provides a new level of manufacturability and installation of the invention.

The implementation of the above tasks will provide significant functional differences of the invention from known analogues, will significantly reduce the cost of protection.

The technical result of the claimed invention is a qualitatively new level of reduction of damage caused by the front, the retention of most of the fragments and the guaranteed prevention of ricochet of the bullet from the inner walls of the compartment due to the joint use of external protection, low-crush and energy-absorbing materials.

This object is achieved in that the anti-ricochet and anti-fragmentation protection of the habitable or cargo compartment contains a frame, an external protection installed on it, when a bullet breaks through it, a large area of fragmentation of fragments is formed and a bullet ricochet from the wall opposite the penetration, and an internal protection fixed to the frame by means of a cord , threaded through the eyelets on the protection and staples on the frame, characterized in that the composition of sheets of light crushable and sheets of energy-absorbing mat is used as internal protection rials, while used as the energy-absorbing ultrahigh molecular polyethylene (UHMWPE), Kevlar, glass fiber or other materials with high impact strength.

The problem is achieved by the fact that low-crush and energy-absorbing materials are attached to each other by glue, grommets, high-strength threads, etc.

The task is achieved in that the internal protection is attached to the external adhesive method.

The task is achieved in that the internal protection is attached to the frame with bolts, a cord, a belt, etc., the counterparts of which, namely the bonks of the fixing bolts, brackets of the cord and belts, etc., are attached to the frame by electric-gas welding or by gluing.

The task is achieved in that the internal protection is attached by hooks that are inserted into the holes made in the frame.

The claimed invention is illustrated using the drawings.

Figure 1 shows a cross section of a habitable or cargo compartment, and - without protection, b - with protection.

Figure 2 shows options a, b, c, d mounting anti-ricochet and anti-fragmentation protection.

The described invention is implemented using the following means.

External protection 1 contains external protection made in the form of metal or other sheets, when a bullet 2 is pierced, a torch of small fragments 3 is formed. Bullet 2 has a certain energy 4, which is sufficient for rebounding 5 from the opposite side of compartment 1 (Fig. 1a).

Anti-ricochet and anti-fragmentation protection (internal protection) 6 is located inside the habitable or cargo compartment 1, and due to the composition of low-crush 8 and energy-absorbing 9 materials, a significant reduction in the torch (expansion angle) of fragments 7 is provided and the bullet rebound from the opposite side is eliminated (Fig. 1b) .

Low-crush material 8 is a material with a low density and is designed to provide the necessary space between the external protection 1, protection 6, on the one hand, to increase the area of detention of 6 fragments by energy-absorbing material when breaking through the wall of compartment 1, on the other hand, to turn the bullet and increasing the area of contact with energy-absorbing material 9.

The energy-absorbing material 9 is UHMWPE, fiberglass and other high-strength materials and is designed to form a barrier that stops small fragments and dampens the energy of a bullet and large fragments both when breaking through from the outside of the protection and inside the compartment.

From Aramid fibers such as Kevlar, CBM, Terlon, Armos and others widely used in the production of armor protection, UHMWPE filament is distinguished by lower cost, higher specific mechanical properties, resistance to ultraviolet radiation, wear resistance, chemical and biological inertness, and also immunity to moisture. The cost of aramid filament in the world market is 70-130 $ / kg, UHMWPE - 45-85 $ / kg. The cost of aramid fiber of low linear density of Russian production reached 100-110 $ / kg.

Adhesive film, glue, Velcro, etc. 10 are designed to create a reliable fastening of the mating parts.

The frame of the habitable or cargo compartment 11 is intended for fastening the external protection 1 and internal protection 6.

The bracket for the hook, belt, cord, etc. 12 are attached to the external protection by means of bolts, electric gas welding, adhesive adhesive.

The fixing hook 13 is designed to connect the fixing tapes (cord) 14, mounted on the inner protection 6 with the bracket (hole) 11, made on the outer protection 1.

The fixing tape (cord) 14, the bolt 15 and the nut 16 are an element of fastening of the internal protection 6.

The described technical solution works as follows.

The technical solution is aimed at the almost complete elimination of damage caused by a bullet breaking through the walls of an inhabited or cargo compartment, reducing the level of personnel losses due to a multiple reduction in the angle of fragmentation and eliminating the rebound from the inner walls of the compartment. The composition of low crease and energy-absorbing materials allows you to achieve this goal without increasing the mass and reducing the cost of manufacturing protection compartment.

A bullet in case of breaking through the wall of compartment 1 leads to the formation of a sufficiently large number of small fragments of armor, a rebound from the opposite wall, hitting almost 100% of the personnel. Anti-ricochet and anti-fragmentation protection 6 protects the internal space from fragments of armor and extinguishes the energy of the bullet, which, flying through the internal protected space, enters the internal protection element on the opposite wall of the compartment. At the same time, the bullet, having lost energy when breaking through the external protection, loses it as a result of repeated penetration through the anti-ricochet and anti-fragmentation protection 6, ricochet from the opposite side and falls into the anti-ricochet and anti-fragmentation protection 6 for the third time, but no longer with a sharp edge. In this case, the contact area of the bullet with anti-ricochet and anti-fragmentation protection 6 is significantly increased and the bullet does not pass into the protected space.

Thus, the claimed invention allows to obtain a qualitatively new level of reducing damages, filter out most of the fragments and is guaranteed to prevent the bullet from rebounding from the inner walls of the compartment due to the joint use of external protection, low-crush and energy-absorbing materials.

Claims (5)

1. Anti-ricochet and anti-fragmentation protection of the habitable or cargo compartment, containing a frame, an external protection installed on it, when a bullet breaks through it, a large area of fragmentation of fragments is formed and a bullet ricochet from the wall opposite the penetration, and an internal protection fixed to the frame by a cord threaded through grommets on the protection and staples on the frame, characterized in that the composition of sheets of low crush sheets and sheets of energy-absorbing materials is used as internal protection, while -absorbent used UHMWPE, Kevlar, glass fiber or other materials with high impact strength. 2. Anti-ricochet and anti-fragmentation protection according to claim 1, characterized in that the low-crush and energy-absorbing materials are attached to each other by glue, grommets, and high-strength threads. 3. Anti-ricochet and anti-fragmentation protection according to claim 1, characterized in that the internal protection is attached to the external adhesive method. 4. The anti-ricochet and anti-fragmentation protection according to claim 1, characterized in that the internal protection is attached to the frame with bolts, a cord, a belt, the mating parts of which, namely bonks of fixing bolts, brackets of the cord and belts, are attached to the frame by electric welding or glueing. 5. Anti-ricochet and anti-fragmentation protection according to claim 1, characterized in that the internal protection is attached by means of hooks that are inserted into the holes made in the frame.

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