Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
  • F41C23/00—Butts; Butt plates; Stocks
  • F41C23/06—Stocks or firearm frames specially adapted for recoil reduction
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
  • F16F7/00—Vibration-dampers; Shock-absorbers
  • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
  • F16F7/1022—Vibration-dampers; Shock-absorbers using inertia effect the linear oscillation movement being converted into a rotational movement of the inertia member, e.g. using a pivoted mass

Definitions

• the present invention relates to a stabilized small arm, such as a riffle or pistol, featuring decreased recoil.
• a fire arm recoil force is reduced by employment a device for absorbing energy in which kinetic energy of a rifle after ignition is converted into kinetic energy of a rotating masses, the device is arranged in a rifle butt constituting a supporting part leaned against a shoulder of a shooter.
• the element absorbing energy is connected with a toothed bar which by means of toothed wheel drives a rotor kinetic energy accumulator.
• the known solutions do not provide an effective absorption of different energy amounts of rifle butt impacts against a shooter shoulder, related with different methods of holding a fire arm and with different force of pressing a butt to a shoulder. Therefore the object of the present invention is to provide higher efficiency of absorption and dissipation of fire arm recoil energy at different shooting technics.
• a stabilized small arm comprises a body with a barrel, wherein to the body is fastened a cartridge magazine, a trigger and a grip, and also a supporting part located at the end part of the body and adapted to a contact with a shooter shoulder. Between the supporting part and the body a kinetic energy absorption rotor arrangement is arranged, in which kinetic energy of progressive movement is transformed into kinetic energy of rotational movement, wherein the arrangement comprises a front plate and a rear plate between which are arranged racks interengaged with toothed wheels driving kinetic energy rotor accumulators of a given moment of inertia.
• the solution according to the present invention is characterized in that at least two racks of the kinetic energy absorption rotor arrangement are interengaged with toothed wheels of the kinetic energy rotor accumulators of differentiated capabilities of energy accumulation, wherein the racks are installed between the front plate and the rear plate defining differentiated gaps providing differentiated idle stroke between them and these plates.
• the kinetic energy rotor accumulators preferably have differentiated moments of inertia.
• the kinetic energy rotor accumulators are preferably driven by means of gears of differentiated transmission ratios that increase rotational velocities.
• the idle stroke of the rack driving the toothed wheel of the kinetic energy rotor accumulator having a capability of accumulation of higher energy is greater than the idle stroke of the rack driving the toothed wheel of the kinetic energy rotor accumulator having a capability of accumulation of lower energy.
• a stabilization of a small arm by inducing rotational movement of successive kinetic energy rotor accumulators enables for obtaining an abrupt stepped increase of energy absorption capability.
• an abrupt stepped increase of energy absorption capability during shooting is achieved by inducing rotational movement of successive kinetic energy rotor accumulators of increasing moments of inertia or by inducing rotational movement of successive kinetic energy rotor accumulators which are gained with increasing rotational velocities by employment of gears of increasing transmission ratios that increase velocities.
• the stabilized small arm according to the present invention is suitable for absorbing energy in case of a small force of leaning of a supporting part, a so-called butt, against a shooter shoulder as well as in a case of loose gripping by inexperienced shooters.
• the small arm according to the present invention provides an efficient and very smooth shock absorption of a recoil, as an absorption of kinetic energy of progressive movement takes place with using kinetic energy rotor accumulators of the smallest moment of inertia.
• the small arm according to the present invention also provides appropriately efficient and smooth shock absorption of recoil, as kinetic energy absorption takes place with using several rotor accumulators of increasing energy absorption capabilities.
• shock absorption of recoil characterized by higher impact an additional effect occurs consisting in that impact kinetic energy is in a great part accumulated in rotor accumulators featuring lower energy absorption capability before rotor accumulators featuring higher energy absorption capability are actuated.
• Such a sequence of energy absorption provides smoother reaction of arm butt on a shooter shoulder.
• Fig. 1 presents a stabilized small arm in an axonometric view, with visualized energy absorption arrangement
• Fig. 2 shows an enlarged axonometric view of shock absorbing parts of the small arm
• Fig. 3 shows a side view of the kinetic energy absorption rotor arrangement with rotor kinetic energy accumulators with the same moment of inertia with employment of gears of different transmission ratios
• Fig. 3 shows a side view of the kinetic energy absorption rotor arrangement with rotor kinetic energy accumulators with the same moment of inertia with employment of gears of different transmission ratios
• Fig. 4 presents a side view of the kinetic energy absorption rotor arrangement with rotor kinetic energy accumulators of different moments of inertia with employment of gears of different transmission ratios.
• the stabilized small arm according to the present invention has a form of a machine gun.
• a kinetic energy absorption rotor device 1 is provided with three racks 2 disposed slidably and separated from each other that drive by means of three toothed wheels 3 three kinetic energy rotor accumulators 4, 5, 6 of differentiated moments of inertia. Between the front plate 12 and particular racks gaps 7, 8, 9 are formed defining an idle stroke of the front plate 1 relative to the racks 2.
• the gap 9 between the front plate 12 and the rack 2 driving the toothed wheel 3 of the kinetic energy rotor accumulator 6 efficient for accumulating the biggest energy is larger than the gap 8 between the front plate 12 and the rack 2 driving the toothed wheel 3 of the kinetic energy rotor accumulator 5 efficient for accumulating medium energy, whereas the gap 7 between the front plate 12 and the rack 2 driving the toothed wheel 3 of the kinetic energy rotor accumulator 4 efficient for accumulating the smaller energy is the smallest.
• elastic shock absorbing elements are arranged in forms of springs 10.
• the toothed wheel 3 and the kinetic energy rotor accumulators 4 are rotatively installed on the side wall 1 1 connected with the rear plate 12, wherein with the same wall are also joint guides 14 of the racks 2.
• the energy accumulation rotor arrangement 1 contacts the body 15 by means of the front plate 12, and the rear plate 13 is connected with the supporting part 16 adapted for a contact with a shooter arm.
• the body of the small arm is integrated with the barrel 17 and is provided at its bottom part with a cartridge magazine and a grip with a trigger 20.
• the energy accumulation rotor arrangement 1 is covered on the external side by elastic bellows-like cover, which is not visualized on the drawing. As shown in the embodiment of Fig.
• a given transmission ratio is determined by the effective diameter of the toothed wheel 3a, 3b and 3c that cooperates with rack 2, and thus in the presented embodiments the kinetic energy rotor accumulator 6 driven by means of the toothed wheel 3a of the biggest effective diameter has the lowest kinetic energy absorption capability, the kinetic energy rotor accumulator 6 driven by means of the toothed wheel 3b of the medium effective diameter has the higher kinetic energy absorption capability, and the kinetic energy rotor accumulator 6 driven by means of the toothed wheel 3c of the smallest effective diameter has the highest kinetic energy absorption capability.
• the toothed wheel 3a of the biggest diameter has the effective diameter two-fold bigger than corresponding diameter of the toothed wheel 3c of the smallest diameter
• the kinetic energy rotor accumulator 6 driven by means of the toothed wheel 3c of the smallest effective diameter shall gain angular velocity two-fold greater than corresponding velocity of the kinetic energy rotor accumulator 6 driven by means of the toothed wheel 3a of the greatest effective diameter, thus it shall feature four-fold greater capability of rotational movement kinetic energy.
• the embodiment presented in Fig. 4 comprises kinetic energy rotor accumulators 4, 5 and 6 of differentiated moments of inertia and gears of differentiated transmission ratios resulting from differentiated effective diameters of the employed driving toothed wheels 3a, 3b, 3c.
• the kinetic energy rotor accumulator 6 of the biggest moment of inertia is driven by means of the toothed wheel 3a of the greatest effective diameter
• the kinetic energy rotor accumulator 4 of the smallest moment of inertia is driven by means of the toothed wheel 3c of the smallest moment of inertia.
• Such a construction provides a possibility of defining a smooth characteristic of a capability of arm recoil kinetic energy according to the present invention.
• unidirectional couplings are also employed, though not presented on the drawing, and arranged between the toothed wheels 3 and kinetic energy accumulators 4, 5, 6.
• the function of these unidirectional couplings is transferring a torque onto kinetic energy rotor accumulators, and after absorption of energy, when angular velocity of the toothed wheel 3 shall be smaller than angular velocity of corresponding kinetic energy rotor accumulator 4, 5, 6, the unidirectional coupling is disconnecting thus it enables for unrestricted rotation of the kinetic energy rotor accumulator 4, 5, 6.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Portable Nailing Machines And Staplers (AREA)

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Publications (1)

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Family Applications (1)

Country Status (2)

Citations (6)

• 2012
  • 2012-07-03 PL PL399777A patent/PL399777A1/pl unknown
• 2013
  • 2013-07-02 WO PCT/IB2013/001408 patent/WO2014006473A1/en active Application Filing

Patent Citations (6)

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