EP1847795A2 - Trägheitsisolierung für Zeigevorrichtung und Ausrichtungsmontagesystem - Google Patents

Trägheitsisolierung für Zeigevorrichtung und Ausrichtungsmontagesystem Download PDF

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Publication number
EP1847795A2
EP1847795A2 EP07106475A EP07106475A EP1847795A2 EP 1847795 A2 EP1847795 A2 EP 1847795A2 EP 07106475 A EP07106475 A EP 07106475A EP 07106475 A EP07106475 A EP 07106475A EP 1847795 A2 EP1847795 A2 EP 1847795A2
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EP
European Patent Office
Prior art keywords
assembly
barrel
linear bearing
bearing
rails
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.)
Withdrawn
Application number
EP07106475A
Other languages
English (en)
French (fr)
Other versions
EP1847795A3 (de
Inventor
John M. Shipman
Daniel E. Burkholder
Richard L. Bissell
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.)
Honeywell International Inc
Original Assignee
Honeywell International Inc
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 Honeywell International Inc filed Critical Honeywell International Inc
Publication of EP1847795A2 publication Critical patent/EP1847795A2/de
Publication of EP1847795A3 publication Critical patent/EP1847795A3/de
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
    • F41F1/00—Launching apparatus for projecting projectiles or missiles from barrels, e.g. cannons; Harpoon guns
    • F41F1/06—Mortars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G11/00—Details of sighting or aiming apparatus; Accessories
    • F41G11/001—Means for mounting tubular or beam shaped sighting or aiming devices on firearms
    • F41G11/002—Mountings with recoil absorbing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G11/00—Details of sighting or aiming apparatus; Accessories
    • F41G11/001—Means for mounting tubular or beam shaped sighting or aiming devices on firearms
    • F41G11/004—Mountings with clamping means on the device embracing at least a part of the firearm, e.g. the receiver or a dustcover

Definitions

  • This invention relates to large bore weapons and more particularly to a method and apparatus for isolating a shock from a mortar firing event while maintaining the alignment of a sensitive electronic pointing device for use on a mortar barrel or similar device.
  • Sensitive electronic pointing devices such as inertial measurement units (IMUs) or inertial navigation systems (INSs), and their attachment structures have been destroyed by this extreme acceleration and deceleration on occasion.
  • IMUs inertial measurement units
  • INSs inertial navigation systems
  • the present invention is a method and apparatus for isolating a sensitive electronic device from the barrel recoil travel using a linear motion bearing mounting system.
  • Honeywell's Tactical Advanced Land Inertial Navigator (TALIN TM ) pointing device requires a mortar mount assembly designed to provide a stable and protective cage parallel to the center line of the barrel.
  • the mortar barrel of a 120 mm mortar weapon moves approximately twelve inches (12") under a high acceleration, developing energy of approximately five hundred thousand fool-pounds (500k ft-lbs.) and then decelerates to a stop in less than 0.010 seconds when fired from a base plate in a free standing configuration.
  • this mount needs to provide for the repeated firing of the mortar weapon without realignment or mechanical adjustment white maintaining a zero ballistic force vector on the pointing device.
  • typical PDMAs pointing device mounting assemblies
  • the typical PDMA experiences catastrophic failure of the steel mounting plates due to stress in excess of the bending moment of the material of their construction. This force exceeds the PDMA shock isolators' travel limit and transfers the shock load into the RLG (ring laser gyroscope) pointing device, causing internal physical damage.
  • RLG ring laser gyroscope
  • a prior art device described in U.S. Patent No. 4,336,917 , uses gas driven pistons and gas accumulator/controllers that are sensor-controlled to maintain position during shock and vibration.
  • Another prior art device described in U.S. Patent No. 6,814,179 , uses shock isolators that are comprised of rubber and polyurethane foam to absorb shock and vibration.
  • the present invention solves the problem of inertial isolation by providing a mechanical assembly designed to provide a linear travel support frame constructed of bearing rail followers aligned parallel with the barrel reactive force vector and suspending the mass of the pointing device on linear bearing rails in a cage assembly that provides and maintains alignment while allowing the mortar weapon to accelerate and decelerate without transfer of motion to the suspended pointing device.
  • the pointing device then returns to its rest position on the linear bearing mounting system by gravitational force.
  • the parts work together to isolate the acceleration vector of the mortar barrel from the TALIN TM mass.
  • the mortar barrel moves the attached bearing rail followers along the linear bearing rails, without imparting any acceleration to the cage assembly containing the TALIN TM .
  • the combined linear bearing rails and bearing rail followers form a simple sliding contact linear motion bearing system.
  • the force vector loads are directionally decoupled between the bearing rail followers and the linear bearing rails in their axis of travel. This prevents the mass of the RLG pointing device from inertially loading the cage assembly in excess of its out of plane deflection limits.
  • FIG. 1 shows a perspective view of inertial isolation and alignment assembly 100, affixed to a mortar weapon comprising a base plate 110, mortar barrel 120, and bipod 130.
  • the inertial isolation and alignment assembly 100 is affixed to the underside of mortar barrel 120.
  • inertial isolation and alignment assembly 100 consists of a barrel clamp assembly 200 to secure inertial isolation and alignment assembly 100 to mortar barrel 120, and a cage assembly 300 to encase a pointing device 310, such as a TALIN TM pointing device.
  • Fig. 2 depicts a perspective view of the preferred inertial isolation and alignment assembly 100 in the extended position.
  • the first part of this embodiment is barrel clamp assembly 200 which mounts to mortar barrel 120.
  • Barrel clamp assembly 200 includes bearing rail followers 210, which position linear bearing rails 340 parallel to mortar barrel 120.
  • the second part of this embodiment is cage assembly 300, which encases pointing device 310 and anchors linear bearing rails 340.
  • Fig. 3 shows a perspective view of the preferred inertial isolation and alignment assembly 100 of Fig. 1 in the ready-to-fire position. It illustrates how linear bearing rails 340 of cage assembly 300 slide through bearing rail followers 210 of barrel clamp assembly 200, effecting the simple sliding contact linear motion bearing system.
  • Fig. 4A shows a front view of the preferred barrel clamp assembly 200
  • Barrel clamp assembly 200 comprises a saddle structure 220 and a saddle clamp structure 230 with saddle clamp bolts 240.
  • Saddle structure 220 has saddle extensions 222 with bearing rail followers 210.
  • Saddle structure 220 and saddle extensions 222 form a one piece "C" channel structure.
  • saddle extensions 222 could also be separate mounting blocks permanently affixed to saddle structure 220.
  • Saddle clamp structure 230 is affixed to saddle extensions 222 with saddle clamp bolts 240.
  • Saddle extensions 222 are drilled and tapped from the top side at each corner to receive saddle clamp bolts 240.
  • This entire saddle structure 220 is preferably machined from a solid piece of bar stock (such as 4340 steel, for example) to provide uniform strength and stress distribution throughout the structure.
  • Saddle structure 220 can also be manufactured from aluminum, titanium, plastic, composite, or other materials able to withstand the forces exerted by a particular mortar weapon, and the temperature rise of the mortar barrel experienced during firing.
  • Barrel clamp assembly 200 is subjected to the acceleration and firing shock of more than two thousand g's on the 120mm mortar weapon during firing. This shock, coupled with torsional stress from a bolt down force of more than 95 foot-pounds across the diagonal length of barrel clamp assembly 200 and the temperature rise from repeated firings, requires additional structure for the barrel clamp assembly 200 to remain dimensionally stable.
  • Fig. 4B shows a side view of the preferred barrel clamp assembly 200.
  • Saddle clamp structure 230 comprises two semi-circular shaped bands 232 with gusseted bolt eye extensions 234, which fit over mortar barrel 120 and bolt on both sides of saddle structure 220.
  • Saddle clamp structure 230 also comprises a rigid mechanical connection 236, connecting the two saddle clamp bands 232, in order to assist in holding the alignment of inertial isolation and alignment assembly 100 constant.
  • Rigid mechanical connection 236 can also function as a handle.
  • the entire saddle clamp structure 230 is preferably machined from a solid piece of bar stock (such as 4340 steel, for example) to provide uniform strength and stress distribution throughout the structure.
  • Saddle clamp structure 230 can also be manufactured from aluminum, titanium, plastic, composite, or other materials able to withstand the forces exerted by a particular mortar weapon, and temperature rise of the mortar barrel experienced during firing.
  • Rigid mechanical connection 236 and saddle clamp bands 232 of the saddle clamp structure 230 can be three separate pieces bolted together, as long as the assembly maintains rigidity.
  • Fig. 5A shows a front view of the preferred cage assembly 300.
  • the cage assembly 300 comprises side plates 320, base structure 330, linear bearing rails 340, shock isolators 350, and shock dampers 360.
  • Base structure 330 comprises two side members 332, which are bolted to a base member 334 to form a u-sbaped shelf for mounting pointing device 310.
  • Side plates 320 are fastened to shock isolators 350.
  • Shock isolators 350 are also fastened to side members 332 of base structure 330.
  • Base structure 330, shock isolators 350, and side plates 320 form an openended box for encasing pointing device 310.
  • Linear bearing rails 340 are fastened to side plates 320, and shock dampers 360 are fastened to the front ends of linear bearing rails 340.
  • Pointing device 310 is bolted onto base member 334 of base plate 330.
  • Shock isolators 350 reduce the parallel and cross-axis firing shock on the pointing device during a firing event.
  • the quantity and type of shock isolators 350 used is determined by the firing shock response spectrum from a particular mortar weapon and the spectral frequencies and magnitudes of attenuation required by the isolated mass. Shock isolators 350 are axially aligned with the center-of-mass of pointing device 310.
  • Shock dampers 360 are placed on the front ends of linear bearing rails 340. Shock dampers 360 provide reduced g-loads on the suspended pointing device cage assembly 300 as it returns to its rest position after a firing event. Shock dampers 360 may consist of air or hydraulic pistons. Shock dampers 360 may alternatively consist of springs or rubber material.
  • Fig. 5B is a side view of the preferred cage assembly 300.
  • Fasteners 322 connect side plates 320 to linear bearing rails 340.
  • the fasteners 322 are preferably cap head socket screws, but are not limited to this type of fastener.
  • Fig. 5B shows eight fasteners 322 attaching each of the linear bearing rails 340 to each of the side plates 320, this invention is not limited to eight fasteners, and other numbers of fasteners may be used.
  • the length of linear bearing rails 340 is determined by the maximum amount of linear travel expected by the mortar barrel 120 during a firing event. In the case of the 120mm mortar weapon, the typical travel distance required to seat the base plate in soft soil is approximately 12 inches, therefore the length of guide rails for this application would be approximately 20 inches.
  • Figure 6 depicts the inertial isolation and alignment assembly 100 mounted on the underside of mortar barrel 120 while the mortar weapon is at rest prior to the initial firing.
  • the initial installation of menial isolation and alignment assembly 100 is accomplished by bolting saddle clamp structure 230 to saddle structure 220 around mortar barrel 120 using saddle clamp bolts 240.
  • Saddle clamp bolts 240 are tightened to a predetermined torque limit, such as 95 ft-lbs, for the 120mm mortar weapon, in a sequential pattern at 10 ft-lb, increments.
  • cage assembly 300 is installed by aligning linear bearing rails 340 with bearing rail followers 210, and sliding cage assembly 300 toward the base piste until it is resting on shock dampers 360, as shown in Fig. 6. This is the resdy-to-fire position.
  • Figure 7 depicts the extended position of the inertial isolation and alignment assembly 100.
  • mortar barrel 120 recoils toward the base plate, causing barrel clamp assembly 200 to slide along linear bearing rails 340 of the inertial isolation and alignment assembly 100.
  • barrel clamp assembly 200 At the end of the firing event, mortar barrel 120 comes to a stop, leaving case assembly 300 suspended on linear bearing rails 340 at a point equal to the distance the mortar barrel traveled during firing, as shown in Fig. 7. This is the extended position.
  • the force of gravity then causes cage assembly 300 to slide down toward the base plate, and come to rest on the shock dampers 360 to the ready-to-fire position depicted in Fig. 6. This operation is repeated as many times as is required by the firing of the mortar weapon.
  • cage assembly 300 is quickly installed by aligning linear bearing rails 340 with bearing rail followers 210 and sliding cage assembly 300 to the ready-to-fire position where it is resting on shock dampers 360. For the quick disconnect, the process is simply reversed. Cage assembly 300 is removed by sliding it from the ready-to-fire position beyond the extended position, until linear bearing rails 340 become free of bearing rail followers 210.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
EP07106475A 2006-04-19 2007-04-19 Trägheitsisolierung für Zeigevorrichtung und Ausrichtungsmontagesystem Withdrawn EP1847795A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US79316906P 2006-04-19 2006-04-19
US11/674,739 US20100269681A1 (en) 2006-04-19 2007-02-14 Pointing Device Inertial Isolation and Alignment Mounting System

Publications (2)

Publication Number Publication Date
EP1847795A2 true EP1847795A2 (de) 2007-10-24
EP1847795A3 EP1847795A3 (de) 2008-07-23

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EP07106475A Withdrawn EP1847795A3 (de) 2006-04-19 2007-04-19 Trägheitsisolierung für Zeigevorrichtung und Ausrichtungsmontagesystem

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US (1) US20100269681A1 (de)
EP (1) EP1847795A3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2146176A2 (de) * 2008-07-15 2010-01-20 Honeywell International Inc. Befestigunssystem für ein Trägheitsnavigationssystem auf ein rücklaufendes Artilleriesystem
WO2012027873A1 (zh) * 2010-08-31 2012-03-08 珠海市春秋光学仪器有限公司 一种翻转支架
EP3217140A4 (de) * 2014-11-05 2017-09-27 Agency For Defense Development Digitales visier für handgetragenes artilleriegeschoss und steuerungsverfahren dafür

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2937720B1 (fr) * 2008-10-29 2010-10-29 Nexter Systems Dispositif de tir pour une munition de defense rapprochee
DE102008056108A1 (de) 2008-11-06 2010-05-12 Rheinmetall Waffe Munition Gmbh Waffe mit Rücklauf und einer diesen dämpfenden Bremseinrichtung
DE102008056112A1 (de) * 2008-11-06 2010-05-12 Rheinmetall Waffe Munition Gmbh Mörser
US8661962B1 (en) * 2011-08-04 2014-03-04 The United States Of America As Represented By The Secretary Of The Army Bipod-mounted mortar fire control system
US9593913B1 (en) * 2015-05-14 2017-03-14 The United States Of America As Represented By The Secretary Of The Army Digital positioning system and associated method for optically and automatically stabilizing and realigning a portable weapon through and after a firing shock
EP3312544A1 (de) * 2016-10-21 2018-04-25 CMI Defence S.A. Montagehalterung für zielvorrichtung
BR112019016940B1 (pt) 2017-03-15 2023-02-28 Saab Ab Disposição para melhorar a precisão de tiro de uma arma
CN112657101A (zh) * 2021-01-19 2021-04-16 任乐涛 一种智能化远射程消防水炮及其操作方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336917A (en) 1979-10-11 1982-06-29 Optimetrix Corporation Shock and vibration isolation system
US6814179B2 (en) 2001-05-25 2004-11-09 Input/Output, Inc. Seismic sensing apparatus and method with high-g shock isolation

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US2376835A (en) * 1940-10-03 1945-05-22 Bell Aircraft Corp Mounting device for fixed machine guns
GB591235A (en) * 1943-12-31 1947-08-12 Heintz Mfg Co Improvements relating to the fire control mechanism of machine guns
US2701963A (en) * 1954-07-19 1955-02-15 Charles E Balleisen Experimental machine gun mount
AT396990B (de) * 1984-03-13 1994-01-25 Hirtenberger Ag Richteinrichtung für einen granatwerfer
FR2588370B1 (fr) * 1985-10-04 1988-02-05 Bertin Robert Support amortisseur antirecul pour lunettes de visee d'armes a feu
US6237463B1 (en) * 1999-06-14 2001-05-29 Honeywell Inc. Isolation system mount for mounting sensitive electronic equipment to non-recoiled artillery
US7448306B2 (en) * 2004-12-21 2008-11-11 Honeywell International Inc. Pointing device inertial isolation and alignment mounting system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336917A (en) 1979-10-11 1982-06-29 Optimetrix Corporation Shock and vibration isolation system
US6814179B2 (en) 2001-05-25 2004-11-09 Input/Output, Inc. Seismic sensing apparatus and method with high-g shock isolation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2146176A2 (de) * 2008-07-15 2010-01-20 Honeywell International Inc. Befestigunssystem für ein Trägheitsnavigationssystem auf ein rücklaufendes Artilleriesystem
EP2146176A3 (de) * 2008-07-15 2013-08-07 Honeywell International Inc. Befestigunssystem für ein Trägheitsnavigationssystem auf ein rücklaufendes Artilleriesystem
WO2012027873A1 (zh) * 2010-08-31 2012-03-08 珠海市春秋光学仪器有限公司 一种翻转支架
US9217621B2 (en) 2010-08-31 2015-12-22 Zhuhai Chunqiu Optical Instruments Co., Ltd. Turning holder
EP3217140A4 (de) * 2014-11-05 2017-09-27 Agency For Defense Development Digitales visier für handgetragenes artilleriegeschoss und steuerungsverfahren dafür
US10222214B2 (en) 2014-11-05 2019-03-05 Agency For Defense Development Digital sight for hand-carried projectile-firing device and method of controlling the same

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Publication number Publication date
EP1847795A3 (de) 2008-07-23
US20100269681A1 (en) 2010-10-28

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