DE3929550A1 - Compensation for unbalance of heavy gun - connects barrel to torsion bar by spring connecting link and arm - Google Patents

Abstract

A method of compensating for the imbalance of a heavy gun at different angles of elevation connects the gun . barrel to a torsion bar by an arm and a pivoted link. As the unbalance increases with a change in the angle of elevation, so the torque exerted on the torsion bar increases to provide an increasing balancing force. An additional spring (5.1) is fitted inside the telescopic link (5) which connects the torsion bar arm (4.2) to the barrel (1). USE - Guns.

Description

Subject of the main patent (patent application P 38 29 860.0) is an unbalance compensation device for a weapon system, especially a heavy one Weapon with a swiveling in elevation direction Gun barrel-carrying part, over a shield pin is stored in a solid frame, the heavy point of the pivotable part outside the axis of rotation of the Schildzapfens lies at the one of the imbalance moment counteracting torque by at least one spring is produced.

The object of the invention is the main patent reasons, such an imbalance balancing device To be designed so that it is very simple  and with low weight and extremely low A good space requirement even with large straightening angles Compensation of the unbalance moment is reached.

This problem is solved according to the characteristics of the main patent in that at least one spring Torsion bar spring serves, the first end rotatably with the Frame is connected while the second end is over one Gearbox connected to the swiveling part of the weapon is.

The present invention aims to improve and further training of the subject of the main patent.

The additional invention is based on the following considerations de:

In the case of an imbalance compensation device according to the main patent, the torsion bar spring energy E _{FD available} for imbalance compensation, which is transmitted to the weapon by the gearbox, is determined with the linear characteristic by the following equation:

With
c _D = torsional strength of the torsion bar,
α _1G = torsion angle of the torsion bar spring with minimal elevation of the pivotable part of the weapon,
α _1V = torsion angle of the torsion bar at maximum elevation of the swiveling part of the weapon.

The energy E _U necessary for the complete balancing of a weapon is the mechanical work which the weapon must be supplied with when rotating from the smallest to the largest elevation. It results from the following equations:

With
M _U20 = greatest imbalance moment of the weapon with the weapon elevation α₂ = 0 °,
α _2max = maximum elevation of the swiveling part of the weapon,
α _2min = minimum elevation of the swiveling part of the weapon.

It can result that the energy E _FD stored in the torsion bar spring selected for spatial or other reasons is considerably smaller than the energy E _U necessary for complete unbalance compensation.

The additional invention is based on the task in Further education of the subject of the main patent one easy way to create more energy save to an almost complete unbalance To get compensation.  

This task is solved according to the additional invention with the characteristics from the characteristic part of claim 1.

Advantageous further developments of the additional invention are described in the subclaims.

It should be noted that a number of features of the main patent, especially according to the sub claims 4 to 7 of the main patent, in connection with the features of the additional invention are particularly advantageous stick embodiments leads.

The basic idea of the additional invention is further transmission elements in the transmission between rotation to design the rod spring and weapon as spring elements, which are missing for the complete balance correction Save energy. Suitable as particularly advantageous e.g. in a four-bar gearbox Connection between that with the second end of the shoot rod spring connected lever and the pivotable part the weapon as another energy store in the form of a Suspension strut, the compression spring e.g. at linear Spring characteristic taking into account the variable Gear ratio to adapt to that Imbalance moment must be interpreted so that the fol approximate energy equations are met.

With
E _FL = absorbed energy of the connection designed as a compression spring with the smallest elevation of the weapon,
C _L = spring stiffness of the compression spring,
I _G = deflection of the compression spring at α _2min ,
I _V = deflection of the compression spring at α _2max .

The following is a reference to the accompanying drawings Embodiment for an unbalance compensation direction explained after the additional invention.

The drawings show:

Fig. 1 in a schematic, partially sectioned Dar position a part of an weapon system on the turret of a main battle tank with an imbalance compensation device from above;

Figure 2 shows the weapon system with imbalance-compensation device according to Figure 1 in a partially sectioned side view ge.

Fig. 3 is a graphical representation of the imbalance curve of the weapon system together with the characteristic line of the compensation device.

In Fig. 1 and 2 is a highly schematic representation of the weapon system to see in the turret of a battle tank, wherein up by the weapon system of the fixed frame, so the carriage forming tower 2, and also consisting of the weapon barrel and weighing body pivotable part 1 Darge are. The pivotable part 1 is pivotally mounted via a shield pin 1.1 in the fixed frame 2 in the direction of elevation and can be pivoted by a directional drive 3 .

Within the interior 2.1 of the turret 2 , a torsion bar spring 4 is arranged parallel to the axis of rotation of the shield pin 1.1 , that is to say transversely to the elevation direction, in the firing direction in front of the shield 1.1 and below the pivotable part 1 of the weapon, one end of which 4.0 is non-rotatably connected via a serration 4.6 a bearing block 2.2 connected to the tower 2 is fixed, while the free end 4.1 of the torsion bar 4 is also non-rotatably connected via a serration 4.6 with a protective tube 4.3 which concentrically surrounds the torsion bar 4 for approximately half its length and which is via ball and roller bearings 4.4 is rotatably mounted in the side walls 2.3 of the weapon shaft. On the outer circumference of the protective tube 4.3 , a lever 4.2 is fastened, which is connected in an articulated manner to one end of a spring strut 5 , the other end of which is articulated on the pivotable part 1 of the weapon. The strut 5 contains a compression spring 5.1 , the bias of which can be changed by a screwable stop 5.2 . Furthermore, a fixed stop 5.3 limits the deflection of the compression spring 5.1 .

The torque of the torsion bar 4 is first transferred to the protective tube 4.3 , which also acts as a torsion bar due to its elastic properties, from which it is finally transferred to the pivotable part 1 of the weapon via the lever 4.2 and the spring strut 5 . A suitable selection of the point of articulation of the spring strut 5 on the pivotable part 1 of the weapon predetermines a crank radius 1.2 , while the crank radius of the lever 4.2 is designated 4.5 . By accordingly different choice of these two crankra dien 1.2 or 4.5 , the bias, the appropriate angle of rotation and the torque to be transmitted to the torsion bar spring 4 can be varied. The spring strut 5 serving as a further energy store is designed according to the formulas given above.

In Fig. 2, two different positions of the weapon system 1 are drawn with solid or dash-dotted lines and the corresponding position of the lever mechanism.

Fig. 3 describes with curves I, II and III the advantageous effects of the additional pressure spring introduced as a further energy storage using the example of a four-bar transmission.

Curve I shows the weapon unbalance moment to be compensated as a function of weapon elevation α ₂ as a cosine function.

Curve III represents this solely through the torsion bar spring achievable compensation torque, which only - like the Comparison with curve I shows - a partial imbalance compensation is achieved.

Curve II provides the result of the torsion bar and compression spring balancing torque, the compression spring as further energy storage according to the above Equations is designed.

As the comparison with curve I shows, it follows - how aimed for - through the additionally integrated compression spring an almost complete imbalance compensation, whereby the still existing small difference related to Game suppression may be desirable.  

In order to be able to store and release the energy necessary for the almost complete unbalance compensation, adapted to the cosine curve of the weapon imbalance, the compression spring cannot be biased or biased by the variable stop 5.2 . Furthermore, the deflection of the compression spring can also be limited by the stop 5.3 .

Claims (4)

1. Unbalance compensation device for a Waffenanla ge, especially with a heavy weapon, with a pivotable in the elevation direction, the weapon barrel carry the part that is mounted on a shield pin in a fixed frame, the focus of the pivotable part outside the axis of rotation of the Shield pin is located, in which a counteracting the unbalance torque is generated by at least one spring, at least one torsion bar spring serving as the spring, the first end of which is connected to the frame in a rotationally fixed manner, while the second end is connected to the pivotable part of the frame via a gear Gun is connected according to patent ... (patent application P 38 29 860.0), characterized in that the gear ( 4.2-5 ) contains at least one additional spring element ( 5.1 ). 2. Compensating device according to claim 1, characterized in that the transmission has a non-rotatably connected to the second end ( 4.1 ) of the torsion bar spring ( 4 ) connected lever ( 4.2 ) which is articulated with a strut articulated on the pivotable part ( 1 ) of the weapon ( 5 ) is connected to at least one compression spring ( 5.1 ). 3. Compensating device according to claim 2, characterized in that the compression spring ( 5.1 ) can be pretensioned by means of a stop ( 5.2 ). 4. Compensating device according to claim 2 or 3, characterized in that the deflection of the compression spring ( 5.1 ) is limited by a stop ( 5.3 ).