EP0374746A2 - Ammunition-feeding device for an automatic gun - Google Patents

Ammunition-feeding device for an automatic gun Download PDF

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Publication number
EP0374746A2
EP0374746A2 EP89123203A EP89123203A EP0374746A2 EP 0374746 A2 EP0374746 A2 EP 0374746A2 EP 89123203 A EP89123203 A EP 89123203A EP 89123203 A EP89123203 A EP 89123203A EP 0374746 A2 EP0374746 A2 EP 0374746A2
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EP
European Patent Office
Prior art keywords
sleeve
hollow shaft
cartridge
coupling
driving sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89123203A
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German (de)
French (fr)
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EP0374746B1 (en
EP0374746A3 (en
Inventor
Helmut Mäder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mauser Werke Oberndorf GmbH
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Mauser Werke Oberndorf GmbH
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Application filed by Mauser Werke Oberndorf GmbH filed Critical Mauser Werke Oberndorf GmbH
Publication of EP0374746A2 publication Critical patent/EP0374746A2/en
Publication of EP0374746A3 publication Critical patent/EP0374746A3/en
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Publication of EP0374746B1 publication Critical patent/EP0374746B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A9/00Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/49Internally-powered drives, i.e. operated by propellant charge energy, e.g. couplings, clutches, energy accumulators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A9/00Feeding or loading of ammunition; Magazines; Guiding means for the extracting of cartridges
    • F41A9/29Feeding of belted ammunition
    • F41A9/30Sprocket-type belt transporters

Definitions

  • the invention relates to a cartridge feed device of a machine gun with at least one star wheel, which can be rotated step by step for the purpose of transporting a cartridge around an axis of rotation, on a hollow shaft, in which a helical spring is arranged coaxially, one end of which is connected to the hollow shaft by means of a driving sleeve and the other end of which by means of a further driving sleeve having gas pressure -Drive member is rotatably connected about the axis of rotation.
  • Such a device is described in DE-PS 33 42 222.
  • the drive member is driven by the gas pressure of the weapon.
  • the helical spring is thereby rotated about the axis of rotation. It takes the star wheel with it via the hollow shaft.
  • the helical spring ensures that the sudden gas pressure does not lead to an excessively jerky rotation of the star wheel. Its movement is dampened by the coil spring.
  • a device of the type mentioned is also in DE-PS 37 03 437 described. Means for setting and adjusting the torsional preload of the helical spring are also not provided here. This has an unfavorable effect on the cartridge transport.
  • the object of the invention is to propose a cartridge feeder of the type mentioned in the introduction, in which the rotational preload of the coil spring is adjustable and adjustable.
  • the above object is achieved in a cartridge feeding device of the type mentioned in the introduction in that a coupling bush is arranged between the driving sleeve and the hollow shaft or the drive member, that in the decoupling position of the coupling bush, the rotational angle position of the driving sleeve relative to the other driving sleeve is adjustable with respect to the axis of rotation and that the coupling sleeve in the coupling position holds the driving sleeve relative to the hollow shaft or the drive member in the set rotational angle position.
  • the torsional preload of the coil spring can be adjusted, readjusted and adjusted at any time. This is done in that the coupling bush is brought into its uncoupling position and then the driver sleeves are rotated against each other. In this angular position, the coupling bush is then brought back into its coupling position, whereby the pre-tensioning of the helical spring is fixed. Correct setting of the pre-tension of the coil spring ensures that the cartridges or the cartridge belt can be transported safely using the star wheels.
  • the coil spring does not abut the inside of the hollow shaft and the turns of the coil spring do not touch, so that between the Coil spring and the hollow shaft, as well as the windings of the coil spring, no frictional forces occur which hinder the transport of the cartridges. It is therefore possible to achieve comparatively high pressure forces for the cartridge transport with comparatively small forces of the gas pressure pressure element, the prestressing of the helical spring being able to be adjusted if necessary.
  • the driving sleeve can be adjusted in fine steps with respect to the hollow shaft in the rotational angle position by means of the coupling bush. It is thereby achieved that the relative angle of rotation position between the drive sleeve driven by the drive member and the end of the helical spring fixedly connected to this drive sleeve does not have to be changed and between the hollow shaft and the drive sleeve driving this there is not only a non-positive connection, but this drive sleeve relative to the Hollow shaft is adjustable in comparatively fine-tuned angular positions.
  • the coupling bushing has a toothed ring on the outside, which engages in an internal toothing of the hollow shaft, and the coupling bushing is provided on the inside with a toothed ring which engages in an external toothing of the driving sleeve.
  • the one ring gear of the coupling bush is axially longer than the other, so that in the decoupling position of the coupling bush the longer ring gear engages with the toothing assigned to it, whereas the shorter ring gear is disengaged from the toothing assigned to it. This makes it easier to move the coupling bush into the coupling position.
  • a cartridge feed device of a machine gun has a gas pressure drive piston, not shown in detail. This is connected by the drive shaft (1) to a first driver sleeve (2) so that the driver sleeve (2) rotates by one step about the axis of rotation (D) when the drive piston is pressurized with gas from the weapon barrel (not shown).
  • the driver sleeve (2) is rotatably mounted in the housing part (3) about the axis (D).
  • One end (4) of a helical spring (5) is held on it in a rotationally fixed manner.
  • the other end (6) of the helical spring (5) is arranged in a second driving sleeve (7) in a rotationally fixed manner.
  • the two Ends (4,6) of the helical spring (5) are axially displaceable in the driver sleeves (2,7), so that torsional preloads of the helical spring (5) do not lead to axial tensioning of the driver sleeves (2,7) and the windings of the helical spring (5) do not touch each other.
  • the driving sleeve (7) has an external toothing (8) into which an inner ring gear (9) of a coupling bush (10) engages.
  • the coupling bush (10) is provided on the outside with an outer ring gear (11) which engages in an internal toothing (12) of a hollow shaft (13).
  • star wheels (14) for the transport of cartridges or a cartridge belt, not shown, are rotatably mounted, the torsional strength between the hollow shaft (13) and the star wheels (14) being achieved via a coupling device (15).
  • the hollow shaft (13) is rotatable on the driving sleeve (2) with its end (16) opposite its internal toothing (12) and is also rotatably mounted in the housing part (3).
  • a latching tongue (17) is arranged on the housing part (3) (cf. FIG. 2) and is associated with latching lugs (18) of the first driving sleeve (2).
  • Five locking lugs (18) are provided on the circumference of the driving sleeve (2).
  • the locking lugs (18) are thus offset from each other by 72 °.
  • the same locking lugs (19) are formed at the end (16) of the hollow shaft (13). These are also gripped by the latching tongue (17).
  • the teeth of the inner ring gear (9) of the coupling sleeve (10) are longer in the axial length of the axis of rotation (D) than the teeth of the outer ring gear (11) of the coupling sleeve (10). Accordingly, the coupling bush (10) has a guide surface (20) (see FIG. 3). However, it is also possible to make the teeth of the inner ring gear (9) shorter in the axial direction of the axis of rotation (D) than the teeth of the ring gear (11). In this case, the guide surface on the inner circumference of the coupling bush (10) results.
  • the pitch of the sprockets (9, 11) can be the same.
  • the ring gear with the shorter teeth which can be disengaged in the manner described in more detail below, have a narrower pitch than the non-disengageable ring gear.
  • the locking tongue (17) holds the driving sleeve (2) and the hollow shaft (13) blocked by the locking lugs (18, 19).
  • the entraining sleeve (2) When the shot is fired, the entraining sleeve (2) is suddenly rotated about the axis of rotation (D) by the associated gas pressure. It rotates the helical spring (5), so that the driving sleeve (7) follows the rotary movement damped by the helical spring (5).
  • the helical spring (5) does not lie on the inside of the hollow shaft (13) and the windings of the helical spring (5) do not touch it, so that the force transmission between the driving sleeve (2) and the driving sleeve (7) is not influenced by uncertainly varying frictional forces .
  • the hollow shaft (13) Due to the movement of the driving sleeve (7), which is damped by the helical spring (5) relative to the driving sleeve (2), the hollow shaft (13) is taken along without slipping. Because it is positively connected via its internal toothing (12) to the outer ring gear (11) of the coupling bush (10) and its inner ring gear (9) to the outer toothing (8) of the driving sleeve (7). Accordingly, the star wheels (14) switch further via the coupling device (15), as a result of which the cartridges or their belt (not shown in detail) are transported one step further. After this step, the end (16) of the hollow shaft (13) latches with its next latching lug (19) on the latching tongue (17).
  • the pretensioning of the helical spring (5) can be easily adjusted.
  • a cover plate (21) of the housing part (3) is loosened and with it the structural unit, in particular consisting of the driving sleeve (2), the hollow shaft (13), the driving sleeve (7), the helical spring (5) and the coupling bush ( 10) - according to Figure 1 to the left - pulled out of the housing part (3).
  • the star wheels (14) are not taken along.
  • the coupling bush (10) is moved in the axial direction, so that its outer ring gear (11) detaches from the internal toothing (12) of the hollow shaft (13).
  • the driver sleeve (7) is then turned on an internal hexagon (22) relative to the driver sleeve (2) in such a way that the helical spring (5) has the desired pretension.
  • the coupling bush (10) is then re-engaged so that it ensures the rotationally fixed connection between the driving sleeve (7) and the hollow shaft (13). In this then adjusted position, the assembly is pushed back into the housing part (3), after which the coupling with the star wheels (14) takes place.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Gear Transmission (AREA)
  • Coating Apparatus (AREA)
  • Vending Machines For Individual Products (AREA)
  • Springs (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

In an ammunition-feeding device for an automatic gun, a damping helical spring (5) is arranged coaxially in a hollow shaft (13) carrying a star wheel (14). The rotational prestress of the helical spring (5) is to be adjustable and settable. For this, a coupling bush (10) is arranged between a driving sleeve (7) and the hollow shaft (13). In its uncoupling position, the driving sleeve (7) is adjustable relative to the axis of rotation (D) in relation to the other driving sleeve (2) of the helical spring (5). In the coupling position, the coupling bush (10) holds the driving sleeve (7) fixedly in terms of rotation relative to the hollow shaft (13). <IMAGE>

Description

Die Erfindung betrifft eine Patronenzuführvorrichtung einer Maschinenwaffe mit mindestens einem zum Patronentransport um eine Drehachse schrittweise drehbaren Sternrad auf einer Hohlwelle, in der koaxial eine Wendelfeder angeordnet ist, deren eines Ende mittels einer Mitnehmerhülse mit der Hohlwelle und deren anderes Ende mittels einer weiteren Mitnehmerhülse mit einem Gasdruck-Antriebsglied um die Drehachse drehfest verbunden ist.The invention relates to a cartridge feed device of a machine gun with at least one star wheel, which can be rotated step by step for the purpose of transporting a cartridge around an axis of rotation, on a hollow shaft, in which a helical spring is arranged coaxially, one end of which is connected to the hollow shaft by means of a driving sleeve and the other end of which by means of a further driving sleeve having gas pressure -Drive member is rotatably connected about the axis of rotation.

Eine derartige Einrichtung ist in der DE-PS 33 42 222 beschrieben. Das Antriebsglied wird vom Gasdruck der Waffe angetrieben. Dadurch wird die Wendelfeder um die Drehachse gedreht. Sie nimmt dabei über die Hohlwelle das Sternrad mit. Durch die Wendelfeder ist erreicht, daß der schlagartig auftretende Gasdruck nicht zu einer allzu stark ruckartigen Drehung des Sternrades führt. Dessen Bewegung ist durch die Wendelfeder gedämpft.Such a device is described in DE-PS 33 42 222. The drive member is driven by the gas pressure of the weapon. The helical spring is thereby rotated about the axis of rotation. It takes the star wheel with it via the hollow shaft. The helical spring ensures that the sudden gas pressure does not lead to an excessively jerky rotation of the star wheel. Its movement is dampened by the coil spring.

Bei der DE-PS 33 42 222 ist keine Möglichkeit zur Justierung der Dreh-Vorspannung der Wendelfeder vorgesehen. Es treten Schwankungen des Drehmoments auf, mit dem die Wendelfeder das Sternrad antreibt. Diese Schwankungen lassen sich auch auf schwer beherrschbare, an der Wendelfeder angreifende Reibungskräfte zurückführen.In DE-PS 33 42 222 there is no possibility of adjusting the torsional preload of the helical spring. There are fluctuations in the torque with which the coil spring drives the star wheel. These fluctuations can also be attributed to friction forces that are difficult to control and act on the helical spring.

Eine Vorrichtung der eingangs genannten Art ist auch in der DE-PS 37 03 437 beschrieben. Auch hier sind Mittel zur Einstellung und Verstellung der Dreh-Vorspannung der Wendelfeder nicht vorgesehen. Dies wirkt sich auf den Patronentransport ungünstig aus.A device of the type mentioned is also in DE-PS 37 03 437 described. Means for setting and adjusting the torsional preload of the helical spring are also not provided here. This has an unfavorable effect on the cartridge transport.

Aufgabe der Erfindung ist es, eine Patronenzuführvorrichtung der eingangs genannten Art vorzuschlagen, bei der die Dreh-Vorspannung der Wendelfeder verstellbar und justierbar ist.The object of the invention is to propose a cartridge feeder of the type mentioned in the introduction, in which the rotational preload of the coil spring is adjustable and adjustable.

Erfindungsgemäß ist obige Aufgabe bei einer Patronenzuführvorrichtung der eingangs genannten Art dadurch gelöst, daß zwischen der Mitnehmerhülse und der Hohlwelle oder dem Antriebsglied eine Kupplungsbuchse angeordnet ist, daß in der Entkupplungsstellung der Kupplungsbuchse die Drehwinkelstellung der Mitnehmerhülse gegenüber der anderen Mitnehmerhülse bezogen auf die Drehachse verstellbar ist und daß die Kupplungsbuchse in der Kupplungsstellung die Mitnehmerhülse gegenüber der Hohlwelle bzw. dem Antriebsglied in der eingestellten Drehwinkelstellung drehfest hält.According to the invention, the above object is achieved in a cartridge feeding device of the type mentioned in the introduction in that a coupling bush is arranged between the driving sleeve and the hollow shaft or the drive member, that in the decoupling position of the coupling bush, the rotational angle position of the driving sleeve relative to the other driving sleeve is adjustable with respect to the axis of rotation and that the coupling sleeve in the coupling position holds the driving sleeve relative to the hollow shaft or the drive member in the set rotational angle position.

Bei dieser Vorrichtung läßt sich die Dreh-Vorspannung der Wendelfeder jederzeit einstellen, nachstellen und justieren. Dies geschieht dadurch, daß die Kupplungsbuchse in ihre Entkupplungsstellung gebracht wird und dann die Mitnehmerhülsen gegeneinander verdreht werden. In dieser Drehwinkelstellung wird dann die Kupplungsbuchse wieder in ihre Kupplungsstellung gebracht, wodurch die eingestellte Vorspannung der Wendelfeder festgelegt ist. Durch die richtige Einstellung der Vorspannung der Wendelfeder ist ein sicheres Transportieren der Patronen bzw. des Patronengurtes mittels der Sternräder gewährleistet.With this device, the torsional preload of the coil spring can be adjusted, readjusted and adjusted at any time. This is done in that the coupling bush is brought into its uncoupling position and then the driver sleeves are rotated against each other. In this angular position, the coupling bush is then brought back into its coupling position, whereby the pre-tensioning of the helical spring is fixed. Correct setting of the pre-tension of the coil spring ensures that the cartridges or the cartridge belt can be transported safely using the star wheels.

Insbesondere ist erreicht, daß die Wendelfeder nicht innen an der Hohlwelle anliegt und die Windungen der Wendelfeder sich nicht berühren, so daß zwischen der Wendelfeder und der Hohlwelle sowie den Windungen der Wendelfeder keine Reibungskräfte auftreten, die das Transportieren der Patronen behindern. Es können also mit vergleichsweise kleinen Kräften des Gasdruck-­Andrucksgliedes vergleichsweise hohe Andruckskräfte für den Patronentransport erreicht werden, wobei im Bedarfsfalle die Vorspannung der Wendelfeder nachgestellt werden kann.In particular, it is achieved that the coil spring does not abut the inside of the hollow shaft and the turns of the coil spring do not touch, so that between the Coil spring and the hollow shaft, as well as the windings of the coil spring, no frictional forces occur which hinder the transport of the cartridges. It is therefore possible to achieve comparatively high pressure forces for the cartridge transport with comparatively small forces of the gas pressure pressure element, the prestressing of the helical spring being able to be adjusted if necessary.

In bevorzugter Ausgestaltung der Erfindung ist mittels der Kupplungsbuchse die Mitnehmerhülse gegenüber der Hohlwelle in der Drehwinkelstellung feinstufig verstellbar. Es ist dadurch erreicht, daß die relative Drehwinkelstellung zwischen der vom Antriebsglied angetriebenen Mitnehmerhülse und dem mit dieser Mitnehmerhülse fest verbundenen Ende der Wendelfeder nicht verändert werden muß und zwischen der Hohlwelle und der diese antreibenden Mitnehmerhülse keine nur kraftschlüssige Verbindung vorgesehen ist, sondern diese Mitnehmerhülse gegenüber der Hohlwelle in vergleichsweise feingestuften Drehwinkelstellungen einstellbar ist.In a preferred embodiment of the invention, the driving sleeve can be adjusted in fine steps with respect to the hollow shaft in the rotational angle position by means of the coupling bush. It is thereby achieved that the relative angle of rotation position between the drive sleeve driven by the drive member and the end of the helical spring fixedly connected to this drive sleeve does not have to be changed and between the hollow shaft and the drive sleeve driving this there is not only a non-positive connection, but this drive sleeve relative to the Hollow shaft is adjustable in comparatively fine-tuned angular positions.

In bevorzugter Ausgestaltung der Erfindung weist die Kupplungsbuchse außen einen Zahnkranz auf, der in eine Innenverzahnung der Hohlwelle eingreift und die Kupplungsbuchse ist innen mit einem Zahnkranz versehen, der in eine Außenverzahnung der Mitnehmerhülse eingreift. Dadurch stellt die Kupplungsbuchse in ihrer Kupplungsstellung eine formschlüssige Verbindung zwischen der Mitnehmerhülse und der Hohlwelle her.In a preferred embodiment of the invention, the coupling bushing has a toothed ring on the outside, which engages in an internal toothing of the hollow shaft, and the coupling bushing is provided on the inside with a toothed ring which engages in an external toothing of the driving sleeve. As a result, the coupling bush in its coupling position establishes a positive connection between the driving sleeve and the hollow shaft.

Um die Kupplungsbuchse in die Entkupplungsstellung zu bringen, wird sie axial gegenüber der Mitnehmerhülse und der Hohlwelle verschoben. Dies hat den Vorteil, daß zur Verstellung der Dreh-Vorspannung der Wendelfeder weder die Wendelfeder, noch die an ihr angreifenden Mitnehmerhülsen, noch die Hohlwelle axial gegeneinander verschoben werden müssen.In order to bring the coupling bush into the uncoupling position, it is shifted axially with respect to the driving sleeve and the hollow shaft. This has the advantage that neither the helical spring nor the driving sleeves acting on it nor the hollow shaft have to be axially displaced relative to one another in order to adjust the torsional preload of the helical spring.

In einer Weiterbildung der Erfindung ist der eine Zahnkranz der Kupplungsbuchse axial länger als der andere, so daß in der Entkupplungsstellung der Kupplungsbuchse der längere Zahnkranz mit der ihm zugeordneten Verzahnung in Eingriff steht, wogegen der kürzere Zahnkranz von der ihm zugeordneten Verzahnung außer Eingriff ist. Dadurch ist das Verbringen der Kupplungsbuchse in die Kupplungsstellung erleichtert.In a further development of the invention, the one ring gear of the coupling bush is axially longer than the other, so that in the decoupling position of the coupling bush the longer ring gear engages with the toothing assigned to it, whereas the shorter ring gear is disengaged from the toothing assigned to it. This makes it easier to move the coupling bush into the coupling position.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen und der folgenden Beschreibung. In der Zeichnung zeigen:

  • Figur 1 einen Längsschnitt einer Patronenzuführvorrichtung,
  • Figur 2 einen Schnitt längs der Linie II-II nach Figur 1 und
  • Figur 3 eine perspektivische Ansicht einer Kupplungsbuchse.
Further advantageous embodiments of the invention result from the subclaims and the following description. The drawing shows:
  • FIG. 1 shows a longitudinal section of a cartridge feed device,
  • Figure 2 shows a section along the line II-II of Figure 1 and
  • Figure 3 is a perspective view of a coupling bush.

Eine Patronenzuführvorrichtung einer Maschinenwaffe weist einen nicht näher dargestellten Gasdruck-Antriebskolben auf. Dieser ist durch die Antriebswelle(1) mit einer ersten Mitnehmerhülse(2) so verbunden, daß sich die Mitnehmerhülse(2) bei einer Gasdruckbeaufschlagung des Antriebskolbens aus dem nicht dargestellten Waffenrohr um die Drehachse(D) um einen Schritt dreht.A cartridge feed device of a machine gun has a gas pressure drive piston, not shown in detail. This is connected by the drive shaft (1) to a first driver sleeve (2) so that the driver sleeve (2) rotates by one step about the axis of rotation (D) when the drive piston is pressurized with gas from the weapon barrel (not shown).

Die Mitnehmerhülse(2) ist im Gehäuseteil(3) um die Achse(D) drehbar gelagert. An ihr ist das eine Ende(4) einer Wendelfeder(5) drehfest gehalten.The driver sleeve (2) is rotatably mounted in the housing part (3) about the axis (D). One end (4) of a helical spring (5) is held on it in a rotationally fixed manner.

Das andere Ende(6) der Wendelfeder(5) ist in einer zweiten Mitnehmerhülse(7) drehfest angeordnet. Die beiden Enden(4,6) der Wendelfeder(5) sind in den Mitnehmerhülsen(2,7) axial verschieblich, so daß Dreh-­Vorspannungen der Wendelfeder(5) nicht zu axialen Verspannungen der Mitnehmerhülsen(2,7) führen und die Windungen der Wendelfeder(5) nicht aneinander anliegen.The other end (6) of the helical spring (5) is arranged in a second driving sleeve (7) in a rotationally fixed manner. The two Ends (4,6) of the helical spring (5) are axially displaceable in the driver sleeves (2,7), so that torsional preloads of the helical spring (5) do not lead to axial tensioning of the driver sleeves (2,7) and the windings of the helical spring (5) do not touch each other.

Die Mitnehmerhülse(7) weist eine Außenverzahnung(8) auf, in die ein innerer Zahnkranz(9) einer Kupplungsbuchse(10) eingreift. Die Kupplungsbuchse(10) ist außen mit einem äußeren Zahnkranz(11) versehen, der in eine Innenverzahnung(12) einer Hohlwelle(13) eingreift. Auf der Hohlwelle(13) sind Sternräder(14) zum Transport von nicht näher dargestellten Patronen bzw. eines Patronengurtes drehfest gelagert, wobei die Drehfestigkeit zwischen der Hohlwelle(13) und den Sternrädern(14) über eine Kupplungseinrichtung(15) erreicht ist.The driving sleeve (7) has an external toothing (8) into which an inner ring gear (9) of a coupling bush (10) engages. The coupling bush (10) is provided on the outside with an outer ring gear (11) which engages in an internal toothing (12) of a hollow shaft (13). On the hollow shaft (13) star wheels (14) for the transport of cartridges or a cartridge belt, not shown, are rotatably mounted, the torsional strength between the hollow shaft (13) and the star wheels (14) being achieved via a coupling device (15).

Die Hohlwelle(13) ist auf der Mitnehmerhülse(2) mit ihrem ihrer Innenverzahnung(12) gegenüberliegenden Ende(16) drehbar und auch im Gehäuseteil(3) drehbar gelagert. Am Gehäuseteil(3) ist eine Rastzunge(17) angeordnet (vgl. Figur 2), die Rastnasen(18) der ersten Mitnehmerhülse(2) zugeordnet ist. Am Umfang der Mitnehmerhülse(2) sind fünf Rastnasen(18) vorgesehen. Die Rastnasen(18) sind also um 72° gegeneinander versetzt. Gleiche Rastnasen(19) sind am Ende(16) der Hohlwelle(13) ausgebildet. Auch diese sind von der Rastzunge(17) erfaßt.The hollow shaft (13) is rotatable on the driving sleeve (2) with its end (16) opposite its internal toothing (12) and is also rotatably mounted in the housing part (3). A latching tongue (17) is arranged on the housing part (3) (cf. FIG. 2) and is associated with latching lugs (18) of the first driving sleeve (2). Five locking lugs (18) are provided on the circumference of the driving sleeve (2). The locking lugs (18) are thus offset from each other by 72 °. The same locking lugs (19) are formed at the end (16) of the hollow shaft (13). These are also gripped by the latching tongue (17).

Die Zähne des inneren Zahnkranzes(9) der Kupplungsbuchse (10) sind in axialer Länge der Drehachse(D) länger als die Zähne des äußeren Zahnkranzes(11) der Kupplungsbuchse (10). Dementsprechend weist die Kupplungsbuchse(10) eine Führungsfläche(20) auf (vg. Figur 3). Es ist jedoch auch möglich, die Zähne des inneren Zahnkranzes(9) in axialer Richtung der Drehachse(D) kürzer zu gestalten als die Zähne des Zahnkranzes(11). In diesem Fall ergibt sich die Führungsfläche am Innenumfang der Kupplungsbuchse(10).The teeth of the inner ring gear (9) of the coupling sleeve (10) are longer in the axial length of the axis of rotation (D) than the teeth of the outer ring gear (11) of the coupling sleeve (10). Accordingly, the coupling bush (10) has a guide surface (20) (see FIG. 3). However, it is also possible to make the teeth of the inner ring gear (9) shorter in the axial direction of the axis of rotation (D) than the teeth of the ring gear (11). In this case, the guide surface on the inner circumference of the coupling bush (10) results.

Die Teilung der Zahnkränze(9,11) kann gleich sein. Vorzugsweise wird jedoch der Zahnkranz mit den kürzeren Zähnen, die in der unten näher beschriebenen Weise ausrückbar sind, eine engere Teilung aufweisen als der nicht ausrückbare Zahnkranz.The pitch of the sprockets (9, 11) can be the same. Preferably, however, the ring gear with the shorter teeth, which can be disengaged in the manner described in more detail below, have a narrower pitch than the non-disengageable ring gear.

Die Funktionsweise der beschriebenen Einrichtung ist etwa folgende:The functionality of the described device is approximately as follows:

Vor einem Schuß aus dem nicht näher dargestellten Waffenrohr hält die Rastzunge(17) die Mitnehmerhülse(2) und die Hohlwelle(13) über die Rastnasen(18,19) blockiert.Before a shot from the gun barrel, not shown, the locking tongue (17) holds the driving sleeve (2) and the hollow shaft (13) blocked by the locking lugs (18, 19).

Beim Schuß wird durch den damit verbundenen Gasdruck die Mitnehmerhülse(2) schlagartig um die Drehachse(D) gedreht. Sie dreht dabei die Wendelfeder(5) mit, wodurch die Mitnehmerhülse(7) der Drehbewegung durch die Wendelfeder(5) gedämpft folgt. Die Wendelfeder(5) liegt nicht innen an der Hohlwelle(13) an und die Windungen der Wendelfeder(5) berühren sie nicht, so daß die Kraftübertragung zwischen der Mitnehmerhülse(2) und der Mitnehmerhülse(7) nicht durch unsicher variierende Reibungskräfte beeinflußt ist. Durch die gegenüber der Mitnehmerhülse(2) durch die Wendelfeder(5) gedämpfte Bewegung der Mitnehmerhülse(7) wird die Hohlwelle(13) schlupffrei mitgenommen. Denn sie ist über ihre Innenverzahnung(12) mit dem äußeren Zahnkranz(11) der Kupplungsbuchse(10) und deren inneren Zahnkranz(9) mit der Außenverzahnung(8) der Mitnehmerhülse (7) formschlüssig verbunden. Dementsprechend schalten über die Kupplungseinrichtung (15) die Sternräder(14) weiter, wodurch die nicht näher dargestellten Patronen bzw. deren Gurt um einen Schritt weitertransportiert wird. Nach diesem Schritt verrastet das Ende(16) der Hohlwelle(13) mit seiner nächsten Rastnase(19) an der Rastzunge(17).When the shot is fired, the entraining sleeve (2) is suddenly rotated about the axis of rotation (D) by the associated gas pressure. It rotates the helical spring (5), so that the driving sleeve (7) follows the rotary movement damped by the helical spring (5). The helical spring (5) does not lie on the inside of the hollow shaft (13) and the windings of the helical spring (5) do not touch it, so that the force transmission between the driving sleeve (2) and the driving sleeve (7) is not influenced by uncertainly varying frictional forces . Due to the movement of the driving sleeve (7), which is damped by the helical spring (5) relative to the driving sleeve (2), the hollow shaft (13) is taken along without slipping. Because it is positively connected via its internal toothing (12) to the outer ring gear (11) of the coupling bush (10) and its inner ring gear (9) to the outer toothing (8) of the driving sleeve (7). Accordingly, the star wheels (14) switch further via the coupling device (15), as a result of which the cartridges or their belt (not shown in detail) are transported one step further. After this step, the end (16) of the hollow shaft (13) latches with its next latching lug (19) on the latching tongue (17).

Um die Dreh-Vorspannung der Wendelfeder(5) an die jeweiligen Gegebenheiten hinsichtlich der vom Antriebskolben bzw. der Antriebswelle(1) ausgeübten Kraft an die für den Antrieb der Sternräder(14) notwendigen Transportkraft anzupassen, läßt sich eine einfache Verstellung der Vorspannung der Wendelfeder(5) vornehmen. Es wird hierfür eine Deckplatte(21) des Gehäuseteils(3) gelöst und mit diesem die Baueinheit, insbesondere bestehend aus der Mitnehmerhülse(2), der Hohlwelle(13), der Mitnehmerhülse (7), der Wendelfeder(5) und der Kupplungsbuchse(10) - nach Figur 1 nach links - aus dem Gehäuseteil(3) herausgezogen. Die Sternräder(14) werden dabei nicht mitgenommen.To the torsional preload of the coil spring (5) to the To adapt the given circumstances with regard to the force exerted by the drive piston or the drive shaft (1) to the transport force required for driving the star wheels (14), the pretensioning of the helical spring (5) can be easily adjusted. For this purpose, a cover plate (21) of the housing part (3) is loosened and with it the structural unit, in particular consisting of the driving sleeve (2), the hollow shaft (13), the driving sleeve (7), the helical spring (5) and the coupling bush ( 10) - according to Figure 1 to the left - pulled out of the housing part (3). The star wheels (14) are not taken along.

Danach wird dann die Kupplungsbuchse(10) in axialer Richtung bewegt, so daß sich ihr äußerer Zahnkranz(11) von der Innenverzahnung(12) der Hohlwelle(13) löst. Anschließend wird die Mitnehmerhülse(7) an einem Innensechskant(22) so gegenüber der Mitnehmerhülse(2) verdreht, daß die Wendelfeder(5) die gewünschte Vorspannung hat. Danach wird dann die Kupplungsbuchse(10) wieder eingerückt, so daß sie die drehfeste Verbindung zwischen der Mitnehmerhülse(7) und der Hohlwelle(13) sicherstellt. In dieser dann justierten Stellung wird die Baueinheit wieder in das Gehäuseteil(3) eingeschoben, wonach die Kupplung mit den Sternrädern(14) erfolgt.Then the coupling bush (10) is moved in the axial direction, so that its outer ring gear (11) detaches from the internal toothing (12) of the hollow shaft (13). The driver sleeve (7) is then turned on an internal hexagon (22) relative to the driver sleeve (2) in such a way that the helical spring (5) has the desired pretension. Then the coupling bush (10) is then re-engaged so that it ensures the rotationally fixed connection between the driving sleeve (7) and the hollow shaft (13). In this then adjusted position, the assembly is pushed back into the housing part (3), after which the coupling with the star wheels (14) takes place.

Claims (11)

1. Patronenzuführvorrichtung einer Maschinenwaffe mit mindestens einem zum Patronentransport um eine Drehachse schrittweise drehbaren Sternrad auf einer Hohlwelle, in der koaxial eine Wendelfeder angeordnet ist, deren eines Ende mittels einer Mitnehmerhülse mit der Hohlwelle und deren anderes Ende mittels einer weiteren Mitnehmerhülse mit einem Gasdruck-Antriebsglied um die Drehachse drehfest verbunden ist,
dadurch gekennzeichnet,
daß zwischen der Mitnehmerhülse(2,7) und der Hohlwelle (13) eine Kupplungsbuchse(10) angeordnet ist, daß in der Entkupplungsstellung der Kupplungsbuchse(10) die Drehwinkelstellung der Mitnehmerhülse(2,7) gegenüber der anderen Mitnehmerhülse(7,2) bezogen auf die Drehachse(D) verstellbar ist und daß die Kupplungsbuchse (10) in der Kupplungsstellung die Mitnehmerhülse(2,7) gegenüber der Hohlwelle(13) bzw. dem Antriebsglied(1) in der eingestellten Drehwinkelstellung drehfest hält.
1. Cartridge feeder of a machine gun with at least one star wheel, which can be rotated step-by-step around a rotation axis for cartridge transport, on a hollow shaft in which a helical spring is arranged coaxially, one end of which is connected to the hollow shaft by means of a driving sleeve and the other end of which is connected to a gas pressure drive member by means of a further driving sleeve is rotatably connected about the axis of rotation,
characterized,
that between the driver sleeve (2,7) and the hollow shaft (13) a coupling sleeve (10) is arranged, that in the decoupling position of the coupling sleeve (10) the rotational angle position of the driver sleeve (2,7) relative to the other driver sleeve (7,2) is adjustable with respect to the axis of rotation (D) and that the coupling bush (10) in the coupling position holds the driving sleeve (2,7) relative to the hollow shaft (13) or the drive member (1) in the set rotational angle position in a rotationally fixed manner.
2. Patronenzuführvorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß mit der Kupplungsbuchse(10) die Mitnehmerhülse(7) gegenüber der Hohlwelle(13) in Drehwinkelstellungen feinstufig verstellbar ist.
2. cartridge feeder according to claim 1,
characterized,
that the clutch sleeve (10), the driver sleeve (7) relative to the hollow shaft (13) is adjustable in rotational angle positions.
3. Patronenzuführvorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Kupplungsbuchse(10) außen einen Zahnkranz(11) aufweist, der in eine Innenverzahnung(12) der Hohlwelle(13) eingreift
3. cartridge supply device according to claim 1 or 2,
characterized,
that the coupling bush (10) has a toothed ring (11) on the outside, which engages in an internal toothing (12) of the hollow shaft (13)
4. Patronenzuführvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Kupplungsbuchse(10) innen einen Zahnkranz(9) aufweist, der in eine Außenverzahnung(8) der Mitnehmerhülse(7) eingreift.
4. Cartridge feeder according to one of the previous claims,
characterized,
that the coupling bush (10) has a ring gear (9) on the inside, which engages in an external toothing (8) of the driving sleeve (7).
5. Patronenzuführvorrichtung nach einem der vorhergehenden Ansprüche 3 und 4,
dadurch gekennzeichnet,
daß der eine Zahnkranz(9,11) der Kupplungsbuchse(10) axial länger ist als der andere, so daß in der Kupplungsstellung der Kupplungsbuchse(10) der längere Zahnkranz mit der ihm zugeordneten Verzahnung in Eingriff steht, wogegen der kürzere Zahnkranz von der ihm zugeordneten Verzahnung außer Eingriff ist.
5. cartridge supply device according to one of the preceding claims 3 and 4,
characterized,
that one sprocket (9, 11) of the coupling bush (10) is axially longer than the other, so that in the coupling position of the coupling bush (10) the longer sprocket engages with the toothing assigned to it, whereas the shorter sprocket of that associated toothing is disengaged.
6. Patronenzuführvorrichtung nach Anspruch 5,
dadurch gekennzeichnet,
daß der äußere Zahnkranz(11) die in axialer Richtung kürzeren Zähne aufweist.
6. cartridge feeder according to claim 5,
characterized,
that the outer ring gear (11) has the shorter teeth in the axial direction.
7. Patronenzuführvorrichtung nach einem der vorhergehenden Ansprüche 5, 6,
dadurch gekennzeichnet,
daß die Kupplungsbuchse(10) in der Entkupplungsstellung an einer Führungsfläche(20) geführt ist.
7. Cartridge feeder according to one of the preceding claims 5, 6,
characterized,
that the coupling bush (10) is guided in the decoupling position on a guide surface (20).
8. Patronenzuführvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß an der die Außenverzahnung(8) aufweisenden Mitnehmerhülse(7) ein Innensechskant(22) zu dessen Verstellung vorgesehen ist.
8. Cartridge feeding device according to one of the preceding claims,
characterized,
that a hexagon socket (22) is provided on the driver sleeve (7) having the external toothing (8) for the adjustment thereof.
9. Patronenzuführvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der von der ihm zugeordneten Verzahnung ausrückbare Zahnkranz feiner verzahnt ist als der nicht ausrückbare Zahnkranz.
9. cartridge supply device according to one of the preceding claims,
characterized,
that can be disengaged from the gearing assigned to it Sprocket is more finely toothed than the non-disengageable sprocket.
10. Patronenzuführvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Mitnehmerhülse(2), gegenüber der die andere Mitnehmerhülse(7) drehwinkelverstellbar ist, eine Rastung(17,18) zugeordnet ist.
10. cartridge supply device according to one of the preceding claims,
characterized,
that the catch sleeve (2), relative to which the other catch sleeve (7) can be adjusted in terms of the angle of rotation, is assigned a catch (17, 18).
11. Patronenzuführvorrichtung nach Anspruch 10,
dadurch gekennzeichnet,
daß für die Hohlwelle(13) eine Rastung(17,19) vorgesehen ist.
11. cartridge supply device according to claim 10,
characterized,
that a detent (17, 19) is provided for the hollow shaft (13).
EP89123203A 1988-12-23 1989-12-15 Ammunition-feeding device for an automatic gun Expired - Lifetime EP0374746B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8815966U 1988-12-23
DE8815966U DE8815966U1 (en) 1988-12-23 1988-12-23 Cartridge feed device of a machine gun

Publications (3)

Publication Number Publication Date
EP0374746A2 true EP0374746A2 (en) 1990-06-27
EP0374746A3 EP0374746A3 (en) 1992-05-27
EP0374746B1 EP0374746B1 (en) 1994-08-31

Family

ID=6831096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89123203A Expired - Lifetime EP0374746B1 (en) 1988-12-23 1989-12-15 Ammunition-feeding device for an automatic gun

Country Status (4)

Country Link
US (1) US5117736A (en)
EP (1) EP0374746B1 (en)
DE (2) DE8815966U1 (en)
NO (1) NO175794C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19917605B4 (en) * 1999-04-19 2005-10-27 Renk Ag Transmission for wind generators
US10968998B2 (en) * 2017-08-24 2021-04-06 Shimano Inc. Bicycle rear sprocket adapter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH238855A (en) * 1943-11-04 1945-08-31 Brevets Aero Mecaniques Device for activating the cartridge strip for automatic weapons.
GB651816A (en) * 1948-10-05 1951-04-11 Bofors Ab Improvements in cartridge magazines for automatic cannons
GB712867A (en) * 1951-03-27 1954-08-04 Brevets Aero Mecaniques Improvements in belt feed mechanisms for automatic firearms
US2766663A (en) * 1952-08-15 1956-10-16 Paul H Dixon Feed mechanism
US2965001A (en) * 1954-05-20 1960-12-20 William D Bobco Rocket launcher
GB2024384A (en) * 1978-06-08 1980-01-09 Karlsruhe Augsburg Iweka Automatic fire-arm
DE3326624A1 (en) * 1983-07-23 1985-01-31 Rheinmetall GmbH, 4000 Düsseldorf Belt feeder of an automatic gas-operated barrel weapon, especially a machine gun

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1290852A (en) * 1917-03-01 1919-01-07 John C Sturgeon Automatic gas-operated firearm.
DE475915C (en) * 1926-09-12 1929-05-03 Venanzio Lionetti Cartridge feeding device for machine guns
DE2757663C2 (en) * 1977-12-23 1983-12-15 Rheinmetall GmbH, 4000 Düsseldorf Double star wheel cartridge belt feeder for an automatic firearm
US4681018A (en) * 1982-11-26 1987-07-21 Heckler & Koch Gmbh Cartridge feed mechanism
DE3342222C2 (en) * 1982-11-26 1985-11-21 Heckler & Koch Gmbh, 7238 Oberndorf Cartridge feeder
DE3703437C1 (en) * 1987-02-05 1988-07-21 Rheinmetall Gmbh, 4000 Duesseldorf, De Belt feed for automatic weapon - has two feeder wheels in common housing selectively coupled to gas-operated piston

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH238855A (en) * 1943-11-04 1945-08-31 Brevets Aero Mecaniques Device for activating the cartridge strip for automatic weapons.
GB651816A (en) * 1948-10-05 1951-04-11 Bofors Ab Improvements in cartridge magazines for automatic cannons
GB712867A (en) * 1951-03-27 1954-08-04 Brevets Aero Mecaniques Improvements in belt feed mechanisms for automatic firearms
US2766663A (en) * 1952-08-15 1956-10-16 Paul H Dixon Feed mechanism
US2965001A (en) * 1954-05-20 1960-12-20 William D Bobco Rocket launcher
GB2024384A (en) * 1978-06-08 1980-01-09 Karlsruhe Augsburg Iweka Automatic fire-arm
DE3326624A1 (en) * 1983-07-23 1985-01-31 Rheinmetall GmbH, 4000 Düsseldorf Belt feeder of an automatic gas-operated barrel weapon, especially a machine gun

Also Published As

Publication number Publication date
US5117736A (en) 1992-06-02
NO175794C (en) 1994-12-07
NO894412D0 (en) 1989-11-06
NO175794B (en) 1994-08-29
EP0374746B1 (en) 1994-08-31
EP0374746A3 (en) 1992-05-27
DE8815966U1 (en) 1990-05-03
DE58908274D1 (en) 1994-10-06
NO894412L (en) 1990-06-25

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