DE4404028A1 - Recoil damper for self-loading firearm - Google Patents

Abstract

The damper is located under the firearm barrel (2) for damping the bolt impact after firing. A weight (1) is located under the barrel front section, contg. plastics cushions (6) as damping elements, as well as an actuating pin (7), acting on the cushions at one end and on the bolt at the other one. Air chambers are formed between the cushions and the casing, compressed under pressure on the cushions. The latter may be cylindrical between two front sides with reduced central periphery. The end side periphery matches the casing inner dia..

Description

It is known for weapons based on the Browning self-loading principle to arrange a damping element below the barrel, which a Stop damping causes when the shutter is released of the shot goes backwards. For this purpose, for example, screw benfedern used, optionally with additional buffer elements made of elastic material, e.g. B. plastic, can be provided to dampen the attack.

When the fastener is flipped forward not only for Reload the weapon by feeding the next cartridge is used, but sometimes also to an undesirably large extent from the guide rails of the lock on the G Cases disadvantageous that the energy grip stored in the spring is recorded, which sometimes leads to an overload of this guide rails and leads to their damage.

It is also known due to the existing manufacturing tolerances resulting play between barrel and breech by a leaf spring to compensate, which is placed above the barrel. Thereby the precision and accuracy of the weapon should be improved.

Unwanted play can have the same adverse effects not only occur in the vertical direction on the barrel, but on all contact points between barrel, bolt and handle.

The invention has for its object a damping element for Self-loading firearms to create both to protect the moving parts as well as to minimize the game as possible many of the contact points between barrel, breech and handle contributes.  

The invention is explained in more detail with reference to the drawing:

At a) the "running game" occurs between the barrel and the leading edge of the Lock on.

In b) the "longitudinal play" occurs between the barrel and the breech.

In c) occurs the "locking game" between the barrel, the breech and the locking bolt of the handle during locking.

At d) the "breech play" occurs between the barrel and the Closure and between the closure and the handle on.

1 denotes an extension piece, which is known as a "barrel weight" in sports weapons and is attached to a barrel 2 that is elongated compared to the series barrel. For this purpose, the barrel 2 has a thread 3 at its mouth end, onto which the barrel weight 1 is screwed. Instead of the thread 3 , other fastening options can be provided, for example clamp connections.

Below the barrel 2 , the barrel weight 1 is slotted vertically, so that it can be fixed in any angular position with the aid of a horizontally extending clamping screw 4 . Preferably, the outside of the barrel weight 1 is adapted to the outer contour of the closure and visually extends it forward.

Below the barrel 2 , the barrel weight 1 has a blind bore which is open to the rear and which receives a damping element 5 . This is also fixed in position by the clamping action of the clamping screw 4 .

The damping element 5 comprises a sleeve in which damping material, for example one or more plastic cushions 6 , is arranged. Towards the front edge of the breech, the sleeve is sealed by an actuating pin 7 which projects beyond the rear edge of the barrel weight 1 towards the breech. After triggering the shot, the fast-moving closure is therefore slowed down by the damping element 5 after it has acted on the lock, so that the remaining components of the weapon are considerably protected, particularly the guide rails for the closure on the handle.

The damping effect of the plastic cushion 6 can include a pneumatic damping component in addition to the damping due to its deformation: For this purpose, the plastic cushion 6 can be tailored, i.e. with a round cross-section (in adaptation to the round inner cross-section of the sleeve) an approximately x-shaped longitudinal section exhibit. In this case, the plastic cushions 6 lie at their two ends with the larger diameter sealingly against the inside of the sleeve wall, while in the central region they have an annular air gap to the sleeve wall due to their smaller diameter there.

The seal between the actuating pin 7 and the sleeve can be dimensioned so that air can escape between these two components while overcoming resistance. In addition to the deformation of the plastic cushion 6, a further damping component is hereby achieved.

In addition to this damping effect, a preload of the barrel is achieved by the damping element before the shot is triggered, since the damping element 5 is placed on the barrel 2 such that the plastic cushions are under compressive stress by means of the actuating pin 7 . Since the damping element 5 is displaced axially to the barrel 2, acting on the barrel 2, a a moment. The fulcrum of this moment lies approximately in the area of the contact point a) between the barrel and the front edge of the breech.

The moment applied by the damping element 5 presses the barrel 2 at this point against the breech and eliminates any running play that may be present.

In the area of the longitudinal play that may occur, the effect is that Damping element pulls the barrel forward overall.

In the area of the locking play that may occur, that the damping element runs down the pivot point presses, i.e. to a firm contact of the barrel and the lock the lock leads.

In the area of the possible breech play also has an effect from that the damping element the barrel and thus the Closure presses down around the fulcrum, so to a fixed Closure of the lock on the handle leads.

In addition to the protection of the weapon, an improved one Precision achieved, which results in a greatly reduced spread and thus improves the hit situation.

A preload can advantageously be provided in the barrel weight 1 . Which enables an individual adaptation of the damping element 5 to the weapon and the wishes of the user. For this purpose, a preload can be achieved by changing the contact surface of the damping element 5 in the blind bore, that is to say the available depth of the blind bore. This can be done for example by a screw 8 which forms the inner end of the blind hole. Alternatively, the sleeve of the damping element can have an adjustable base so as to reduce or enlarge the space for the damping cushions and to preload them.

In both cases, the prestress can be adjusted by the user from the outside if the adjustment means can be carried out through a bore 9 which is axially aligned with the blind bore or the damping element 5 and which opens at the barrel weight 1 at the front.

Claims (3)

1. Damping device for self-loading firearms, where the damping device is arranged below the barrel of the firearm and dampens the stop of the closure after firing the shot, characterized in that a barrel weight ( 1 ) is arranged in the front region of the barrel ( 2 ) which comprises damping elements (plastic cushion 6 ) arranged in a sleeve and an actuating pin ( 7 ) which one end acts on the damping elements (plastic cushion 6 ) and the other end rests on the closure. 2. Damping device according to claim 1, characterized in that between the damping elements (plastic cushion 6 ) and the sleeve air chambers are formed, which are compressed at a pressure on the damping elements. 3. Damping device according to claim 1 or 2, characterized in that the damping elements are in the form of plastic cushions ( 6 ) which have a substantially cylindrical shape with respect to their two ends, but in the middle have a smaller circumference, the circumference the plastic cushion ( 6 ) is adapted at its two ends to the inner circumference of the sleeve for sealing the plastic cushion against the sleeve.