EP0646761A1 - System zur Befestigung eines Kanonenrohrs bei einer Waffe von mittlerem oder grossem Kaliber - Google Patents

System zur Befestigung eines Kanonenrohrs bei einer Waffe von mittlerem oder grossem Kaliber Download PDF

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Publication number
EP0646761A1
EP0646761A1 EP94401875A EP94401875A EP0646761A1 EP 0646761 A1 EP0646761 A1 EP 0646761A1 EP 94401875 A EP94401875 A EP 94401875A EP 94401875 A EP94401875 A EP 94401875A EP 0646761 A1 EP0646761 A1 EP 0646761A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
nut
rotation
worm
plunger
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
EP94401875A
Other languages
English (en)
French (fr)
Other versions
EP0646761B1 (de
Inventor
Georges Simon
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.)
CTA International SAS
Original Assignee
Giat Industries SA
CTA International SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Giat Industries SA, CTA International SAS filed Critical Giat Industries SA
Publication of EP0646761A1 publication Critical patent/EP0646761A1/de
Application granted granted Critical
Publication of EP0646761B1 publication Critical patent/EP0646761B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/48—Barrel mounting means, e.g. releasable mountings for replaceable barrels
    • F41A21/482—Barrel mounting means, e.g. releasable mountings for replaceable barrels using continuous threads on the barrel

Definitions

  • the present invention relates to a system for mounting the tube of a medium or large caliber weapon on a sleeve of the breech assembly of the weapon, said system being of the type comprising a nut intended to be screwed onto a threaded end of the tube .
  • the fixing of the tube on the sleeve is generally carried out according to two mounting techniques.
  • a first technique the tube is screwed into the sleeve by means of complementary threads provided respectively in the sleeve and on the tube.
  • this mounting technique requires rotating the tube, which is not a simple operation given the dimensions and the heaviness of the tube.
  • thread starters which must be machined in a very precise manner, which is also a delicate operation to perform.
  • the tube is fixed to the sleeve by means of a nut located at the front of the sleeve and the thread of which engages with a thread provided on the sleeve.
  • a nut located at the front of the sleeve and the thread of which engages with a thread provided on the sleeve.
  • the main object of the invention is to overcome the drawbacks of the aforementioned first mounting technique by improving the aforementioned second mounting technique based on the use of a nut, but the position of the nut and its control system in rotation are modified to facilitate assembly operations while limiting the machining operations to be performed on the tube and on the sleeve.
  • the invention proposes a system of mounting of the tube of the aforementioned type and which is characterized in that the nut is mounted freely by an opening inside a housing of the sleeve to receive said threaded end of the tube once it has been introduced inside the sleeve, and in that said system also comprises a device for driving the nut in rotation which consists of a gear device and a control means actuated from outside the sleeve and intended to engage with the gear device.
  • the gear device comprises a pinion which meshes with a straight toothing provided on the peripheral surface of the nut.
  • the pinion is integral with a shaft, at least one end of which protrudes outside the sleeve, the control means actuated from outside the sleeve being constituted by a tool, such as a key, intended to engage said shaft to drive it in rotation.
  • the pinion of the mounting system can be generally located outside the sleeve, a light being provided in the latter at the housing containing the nut to allow the pinion to mesh with the external toothing of the nut.
  • the nut of the mounting system can be advantageously introduced inside the sleeve by one of the lateral openings thereof, these openings being necessary to allow the chamber to pivot.
  • the pinion of the gear device cooperates with a pinion locking device in the opposite direction of rotation from that corresponding to the screwing of the nut on the tube, this device being disengageable to allow the tube disassembly operation.
  • this blocking device consists of a pivoting pawl intended to engage between the teeth of the pinion under the action of a retractable return spring by means of a lever.
  • the axis of rotation control of the pinion of the gear device is accessible from the front or from the rear of the sleeve, which has an advantage, especially in the case of mounting a tube on a tank turret. .
  • the gear device comprises an endless screw which meshes with a helical toothing provided on the peripheral surface of the nut.
  • the worm is hollow and mounted in a housing machined in the thickness of the sleeve, and the control means actuated from outside the sleeve is constituted by a tool such as a key intended to be partially engaged inside the worm to drive the latter in rotation, the housing containing the screw opening into the housing containing the nut to allow the screw to mesh the nut.
  • the system also comprises a device for blocking the rotation of the worm screw as long as the control means is not engaged inside said screw.
  • this blocking device comprises a plunger housed in the bottom of the screw and movable axially between two positions, a radial retractable blocking pin and a return spring which tends to automatically bring the plunger back into one of said positions or locking position, said radial pin being intended either to engage in a notch of the sleeve for immobilizing the worm in rotation when the plunger is in its locking position, or to retract inside a notch provided in the body of the plunger when the latter is in the other of said positions to allow the rotation of the worm.
  • control means With such a blocking device, the control means must be engaged in the worm so as to bear on the plunger to unlock the blocking pin and thus allow the rotation of the worm.
  • the tightening torque necessary for screwing the nut can be significantly reduced due to the reduction ratio which is obtained by the use of a gear device .
  • a weapon 1 of medium or large caliber comprises in particular a breech assembly 2 equipped with a sleeve 3 on which is mounted the tube 5 of the weapon, like this is schematically shown in Figure 1.
  • the sleeve 3 has two opposite openings respectively front 6 and rear 7 at its two ends. Between these two openings 6 and 7, the interior volume of the sleeve 3 is divided into a front housing 8 adjacent to the front opening 6, and a rear housing 9 adjacent to the rear opening 7.
  • a loading chamber C of the pivoting type for example, is mounted in the rear housing 9 of the sleeve 3, the pivot axis X-X of this chamber C being for example perpendicular to the journal axis of the weapon.
  • the tube 5 is fixed to the sleeve 3 by means of a nut 10 intended to cooperate with a threaded end 12 of the tube 5.
  • the nut 10 is freely mounted in the front housing 8 of the sleeve 3.
  • the connection of the tube 5 on the sleeve 3 is effected by rotation of the nut 10 on the threaded end 12 of the tube 5 by means of a mounting system which comprises a gear device 13 and a control means 15 (FIG. 2) actuated from the outside of the sleeve 3 and intended to come into engagement with the gear device 13 to cause the rotation of the nut 10.
  • the gear device 13 comprises a pinion 17 which meshes with a straight toothing 19 cut on the peripheral surface of the nut 10.
  • the pinion 17 is integral in rotation with a shaft 20 which runs right through it.
  • the shaft 20 ends, at each end, with a head 20a of hexagonal shape for example.
  • the sleeve 3 has a lateral opening 22 through which the nut 10 is introduced into the housing 8 of the sleeve 3.
  • the pinion 17 is housed partly in this opening 22 to engage the external toothing Nut 19 and so that the shaft 20 integral with the pinion 17 remains located outside the sleeve 3 so as to be able to freely access each of the ends of the shaft.
  • the shaft 20 is rotatably supported by a cover 24 attached to the opening 22 of the sleeve 3 and fixed to the latter by any suitable means.
  • the mounting system is completed by a blocking device 25 which cooperates with the pinion 17 to block the latter in the opposite direction of rotation from that corresponding to the screwing of the nut 10 on the threaded end 12 of the tube 5, and for brake the rotation of the pinion 17 in the other direction.
  • the locking device 25 comprises a pivoting pawl 26 intended to engage between the teeth of the pinion 17 under the action of a return spring 28.
  • the pawl 26 is retractable by means of a lever 29 which projects at the 'outside of the cover 24 by an opening 24a.
  • the nut 10 is mounted freely inside the front housing 8 of the sleeve 3 through the opening 22, and the threaded rear part 12 of the tube 5 is engaged by the front opening 6 of the sleeve 3 to center the nut 10 on the tube 5.
  • the cover 24 fitted with the pinion 17 and the locking device 25 is attached to the opening 22 of the sleeve 3, so as to engage the teeth of the pinion 17 with the external toothing 19 of the nut 10.
  • the control means 15 which is, for example, a tool such as a key engaged with the head 20a of one of the ends of the shaft 20, the rotation is caused the pinion 17 which in turn causes the rotation of the nut 10 and an axial displacement of the tube 5.
  • the assembly operation of the tube 5 is terminated when an external radial shoulder 30 of the tube 5 abuts against the face d 'front end of the sleeve 3, and that the nut 10 abuts against the bottom of the front housing 8.
  • two notches 31 and 32 respectively provided at the shoulder 30 of the tube 5 and the front face of the sleeve 3, are located mutually opposite each other.
  • a key 33 is then engaged in the space defined by these two notches 31 and 32, and fixed to the sleeve 3 by means of a screw 35 for example.
  • the pinion 17 of the first embodiment is replaced by an endless screw 40 freely mounted in a housing machined in the thickness 41 of the sleeve 3.
  • This housing 41 extends perpendicular to the axis of the sleeve 3 and opens laterally, towards its end, in the front housing 8 of the sleeve 3 so that the endless screw 40 can come into engagement with the external toothing 19 of the nut 10.
  • This toothing 19 is in this case a helical toothing.
  • the endless screw 40 is hollow so as to be able to introduce therein the control means 15 constituted by a tool such as a hexagonal wrench for example, for rotating the endless screw 40, the profile of the internal housing 42 of the worm 40 being complementary to that of the tool.
  • a tool such as a hexagonal wrench for example
  • the worm 40 is retained axially inside the housing 41 of the sleeve 3 by a threaded ring 43 which screws into the housing 41.
  • the ring 43 has an internal diameter sufficient to allow the passage of the control means 15.
  • the mounting system is also completed by a blocking device 25 which cooperates with the endless screw 40 to block it in rotation as long as the control means 15 is not engaged in the internal housing 42 of the endless screw 40, as will be explained later.
  • the locking device 25 comprises a plunger 45 mounted in the internal housing 42 which passes axially and right through the endless screw 40.
  • the plunger 45 has at one end a head 46 which is extended by a body 47 having a peripheral groove annular 48 intended to cooperate with a retractable blocking pin 50.
  • the locking pin 50 is intended to cooperate with at least one radial hole 52 which passes through the worm 40 and which extends into the sleeve 3.
  • the pin 50 has a head 53 extended by a body 54 whose free end is of rounded shape.
  • the pin 50 is inserted from the inside of the screw 40 so that its body 54 engages in the hole 52 to immobilize the endless screw 40 in rotation relative to the sleeve 3.
  • a return spring 55 is mounted around the body 47 of the plunger 45 and the assembly is freely introduced into the internal housing 42 of the worm screw 40.
  • the return spring 55 is intended to bear on the one hand, against the head 46 of the plunger 45 and, on the other hand, against an annular shoulder 56 formed inside the internal housing 42 of the worm 40.
  • the plunger 45 is engaged inside the worm 40 until that the end of its body 47 projects beyond the bottom end of the housing 42 which opens to the outside.
  • a pin 58 is then engaged through the body 47 of the plunger 45 and bears against the end of the worm screw 40.
  • the plunger 45 under the action of the return spring 55 is then in a first position or blocking position . In this position, the head 53 of the retractable pin 50 bears against the body 47 of the plunger 45, that is to say that the groove 48 of the body 47 of the plunger 45 is not opposite the pin 50.
  • the nut 10 is freely mounted inside the front housing 8 of the sleeve 3, and the threaded rear part 12 of the tube 5 is engaged by the front opening 6 of the sleeve 3 to center the nut 10 on the tube .
  • the control means 15 are introduced into the housing 42 of the worm screw 40 until a sufficient pressing force is exerted on the head 46 of the plunger 45 to move the latter into a second position where the pin 50 is located opposite the groove 48 of the body 47 of the plunger 45. Then, by forcing the rotation of the worm 40 by the control means 15, the pin 50 can partially retract inside the groove 48 to disengage from the sleeve 3 and thus allow the worm screw 40 to be released in rotation.
  • the rotation of the screw 40 causes the rotation of the nut 10 and an axial displacement of the tube 5.
  • the control means 15 is released from the worm 40.
  • the plunger 45 automatically returns to its locked position under the action of the return spring 55.
  • the displacement of the plunger 45 forces the pawn 50 to disengage from the throat 48 and to penetrate further into the e hole 52 of the sleeve 3 for immobilizing the endless screw 40 in rotation.
  • This second embodiment has the particular advantage of eliminating the cover 24 of the first embodiment, that is to say that the mounting system is entirely contained inside the sleeve 3.
  • the sleeve 3 received a chamber C of the pivoting type.
  • the sleeve 3 has two side openings 9a facing each other (FIG. 1) to allow the chamber C to pivot.
  • l 'nut 10 is advantageously introduced into the sleeve 3 through one of the openings 9a.
  • the lateral opening 22 initially intended to introduce the nut 10 can be reduced to a simple lumen 22a (FIG. 3) just necessary to allow the pinion 17 to mesh with the nut 10.
  • This variant offers in particular the advantage of less weaken the sleeve 3.
  • the field of application of the system according to the invention is not limited to mounting the barrel of a weapon, but can be applied to any mechanical system in which a nut or a screw is difficult to access with conventional screwing means.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Dowels (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Gears, Cams (AREA)
EP94401875A 1993-10-04 1994-08-19 System zur Befestigung eines Kanonenrohrs bei einer Waffe von mittlerem oder grossem Kaliber Expired - Lifetime EP0646761B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9311780A FR2710973B1 (fr) 1993-10-04 1993-10-04 Système de montage d'un tube d'une arme de moyen ou gros calibre.
FR9311780 1993-10-04

Publications (2)

Publication Number Publication Date
EP0646761A1 true EP0646761A1 (de) 1995-04-05
EP0646761B1 EP0646761B1 (de) 1998-10-14

Family

ID=9451503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94401875A Expired - Lifetime EP0646761B1 (de) 1993-10-04 1994-08-19 System zur Befestigung eines Kanonenrohrs bei einer Waffe von mittlerem oder grossem Kaliber

Country Status (4)

Country Link
US (1) US5438785A (de)
EP (1) EP0646761B1 (de)
DE (1) DE69413920T2 (de)
FR (1) FR2710973B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9823040B1 (en) * 2016-08-23 2017-11-21 Shih-Che Hu Gun barrel unit for a toy gun

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR896501A (fr) * 1939-04-22 1945-02-23 Cie Commerciale Caproni Canon démontable
US3611611A (en) * 1969-12-15 1971-10-12 Idaho Bank Of Commerce Barrel to receiver connection for firearms having interchangeable barrels
FR2161701A5 (de) * 1971-11-19 1973-07-06 Walther C Fa
US3849925A (en) * 1972-05-26 1974-11-26 K Mayer Repeater gun, especially rifle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2736119A (en) * 1956-02-28 Firearm having chamber member
US4869153A (en) * 1987-11-20 1989-09-26 Esperanza Y Cia., S.A. Mechanism for fastening the barrel in a mortar unit
US5020260A (en) * 1989-12-29 1991-06-04 H-S Precision, Inc. Take-down rifle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR896501A (fr) * 1939-04-22 1945-02-23 Cie Commerciale Caproni Canon démontable
US3611611A (en) * 1969-12-15 1971-10-12 Idaho Bank Of Commerce Barrel to receiver connection for firearms having interchangeable barrels
FR2161701A5 (de) * 1971-11-19 1973-07-06 Walther C Fa
US3849925A (en) * 1972-05-26 1974-11-26 K Mayer Repeater gun, especially rifle

Also Published As

Publication number Publication date
FR2710973B1 (fr) 1995-12-08
US5438785A (en) 1995-08-08
FR2710973A1 (fr) 1995-04-14
DE69413920T2 (de) 1999-03-04
DE69413920D1 (de) 1998-11-19
EP0646761B1 (de) 1998-10-14

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