Automatic firing machine suitable for double-chain-wheel chained external energy firearms

Abstract

The invention discloses an automatic firing machine suitable for a double-chain-wheel chained external energy firearm. The automatic firing machine comprises a firearm frame serving as a base of a firing mechanism, a firing mechanism and other functional mechanisms. The firing pin sleeve spring exerts acting force on the sleeve assembly, it is guaranteed that the position of the sleeve assembly is controllable, and the sleeve assembly does not shake in the automatic circulation process. And the firing pin spring provides energy for the firing pin and pushes the firing pin to strike the bullet primer. And the firing pin stop block is fixed at the front part of the bolt frame, is arranged between the bosses at the two ends of the firing pin and is used for limiting the displacement of the firing pin and preventing the firing pin from falling off. And the firing pin sleeve is sleeved in the bolt frame, extends out of the front end surface of the bolt frame, and provides a stable firing position and short firing staying time for the firing pin. And the firing pin is arranged in the firing pin sleeve, and after being released, the firing pin impacts the ammunition primer to ignite the propellant powder. And the firing pin deflector rod spring provides continuous downward pressing force for the front end of the firing pin deflector rod to ensure that the firing pin deflector rod is reset. And the firing pin shifting rod rotates and swings after being stressed so as to release the firing pin. The combat effectiveness of the weapon can be improved.

Description

Technical Field

[0001] This invention belongs to the field of firearms design, specifically relating to an automatic firing mechanism suitable for dual-chain external power firearms. Background Technology

[0002] Externally powered weapons do not rely on the energy of gunpowder combustion gases for automatic operation; instead, they are driven by an external power source. Compared to internally powered weapons, they offer higher controllability of firing rate, lower failure rate, and more stable and reliable operation. Especially during continuous fire, even if ammunition fails to fire, the automatic cycle of extraction, ejection, and reloading can still be completed without interruption of firepower. This reduces the probability of manual troubleshooting and makes them particularly suitable for use on unmanned combat platforms.

[0003] Chain-driven automatic weapons utilize external energy to drive the rotation of a transmission chain, which in turn drives the automatic mechanism in a recoil and return cycle. Typically, the transmission chain is mounted on a track consisting of four sprockets arranged in a rectangular pattern, with one driving sprocket rotating under motor control, driving the other three driven sprockets. Four-sprocket chain-driven automatic mechanisms are relatively wide and complex in structure. In firearm design, to reduce weight and size, the chain-driven automatic mechanism can be simplified to a double-sprocket configuration, with the sprockets arranged back and forth in the automatic cycle direction. However, in the double-sprocket configuration, the automatic mechanism cannot remain at the very front during transmission, unlike the four-sprocket configuration or traditional internally powered automatic mechanisms. Upon returning to the front, it immediately reverses direction and recoils, failing to provide a reliable dwell time for firing. Achieving this by frequently starting and stopping the motor at the front position is difficult and costly in terms of precise position control; furthermore, frequent starting and stopping causes vibration of the weapon, affecting shooting accuracy. It also shortens the lifespan of components and increases the likelihood of malfunctions.

[0004] Currently, although some externally powered automatic mechanisms are no longer constrained by internal energy, they still adopt the design logic of "recoil-wait-fire-return-to-release-fire" in internally powered weapons, failing to fully utilize the external energy driving characteristics, and there is redundancy in each functional mechanism. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic firing mechanism suitable for dual-chain externally powered firearms, so as to solve the problem that dual-chain automatic mechanisms cannot stop to provide firing pause time, reduce the structural complexity of chain externally powered firearms, and improve the combat effectiveness of weapons.

[0006] The technical solution to achieve the purpose of this invention is as follows:

[0007] An automatic firing mechanism suitable for a dual-chain externally powered firearm, comprising:

[0008] The bolt carrier, in conjunction with the receiver, completes the recoil reset of the automatic firing mechanism after firing.

[0009] The firing pin sleeve is fitted inside the bolt carrier and extends out of the front end face of the bolt carrier. It is used to provide a stable firing space and firing dwell time for the firing pin. This firing space also serves as the mating space between the firing pin lever assembly and the firing pin.

[0010] The firing pin, located inside the firing pin sleeve, is used to strike the primer of the ammunition after being released, igniting the propellant;

[0011] A limiting module mounted on the bolt carrier is used to axially limit the firing pin and firing pin sleeve;

[0012] The firing pin lever assembly, acting as the sear of the firing pin, is used to lock the position of the firing pin and can release the firing pin during the forward movement of the bolt carrier and reset it during the recoil movement of the bolt carrier.

[0013] A firing pin sleeve spring is provided between the bolt carrier and the firing pin sleeve to ensure that the firing pin sleeve always extends out of the front end of the bolt carrier, so that the front end of the firing pin sleeve can abut against the receiver during recoil; and to reset the firing pin sleeve during the recoil process after firing.

[0014] The firing pin spring, located between the bolt carrier and the firing pin, stores elastic potential energy for the firing pin during the bolt carrier's return motion. After the firing pin lever assembly releases the firing pin, it pushes the firing pin to strike the primer of the bullet, thus completing the firing.

[0015] The significant advantages of this invention compared to existing technologies are:

[0016] (1) This automatic firing mechanism solves the problem that the double sprocket chain automatic mechanism cannot stop to provide firing dwell time. Through the relative movement between the component and the bolt carrier, the firing mechanism can stop at the front end, providing firing dwell time and simultaneously realizing the firing function.

[0017] (2) The automatic firing mechanism has a simple structure, low failure rate, and reliable operation. By integrating the firing mechanism and the launching mechanism into one unit, the complex linkage mechanism such as the safety device in traditional designs is eliminated, significantly reducing the number of parts and lowering the failure rate. The safety mechanism of "no firing until the target position is reached" is fully utilized to ensure safety.

[0018] (3) The automatic firing mechanism has a wide range of radio frequency applications. The firing action is independent of the recoil process of the automatic mechanism and is only limited by the external energy driving capability. It can achieve stable and reliable firing in a range of firing rates from low to high without the need to redesign the internal mechanism to match the firing rate.

[0019] (4) The automatic firing mechanism has a fast firing response speed, precise firing timing, and consistent firing rate, which helps to improve shooting accuracy. The firing pin energy is provided by the firing pin spring, the firing time is short, and the action is rapid; the firing trigger point corresponds directly to the mechanical limit position, and the firing occurs immediately upon returning to the position. This avoids the firing timing deviation and timing delay caused by fluctuations in various aspects such as ammunition performance and linkage mechanism in the traditional method, and the impact is small, thus significantly improving shooting accuracy and the consistency of the action cycle.

[0020] (5) The structure is simple, the control logic is simple, and the production, maintenance and use costs are low. The mechanical structure of the parts has no complex curved surface geometry, and the processing difficulty is low. The firing control is decoupled from other actions of the automatic machine, which makes the design of the control system simpler and facilitates fault diagnosis and system maintenance.

[0021] (6) High compatibility and versatility. It only requires a simple mechanical connection with the recoil mechanism, without the need to modify the core drive logic, and is easy to integrate into other weapon systems. Attached Figure Description

[0022] Figure 1 Isometric drawing for assembling an automatic firing mechanism.

[0023] Figure 2 This is an exploded view of the automatic firing mechanism.

[0024] Figure 3 Isometric drawing of the sleeve assembly.

[0025] Figure 4 This is a schematic diagram of the features of the firing pin sleeve part.

[0026] Figure 5 This is a schematic diagram of the characteristics of the firing pin lever component.

[0027] Figure 6 This is a schematic diagram of the features of the bolt carrier component.

[0028] Figure 7 This is a cross-sectional view of an automatic firing mechanism.

[0029] Figure 8 This is a cross-sectional view of the automatic firing mechanism during the recoil process.

[0030] Figure 9 This is a cross-sectional view of the automatic firing mechanism during the return-to-position firing.

[0031] Figure 10 This is a graph showing the change in the center of mass position of the component during the reciprocating motion.

[0032] Figure 11 This is a cross-sectional view of the automatic firing mechanism during recoil. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] Combination Figure 1 , Figure 2 The present invention discloses an automatic firing mechanism suitable for a double-chain-driven externally powered firearm, comprising a bolt carrier 1, a firing pin sleeve spring 2, a firing pin spring 3, a firing pin stop block 4, a firing pin 5, and a sleeve assembly 6. The sleeve assembly 6 includes a firing pin sleeve 601, a lever pivot pin 602, a lever spring 603, and a firing pin lever 604. The bolt carrier 1 serves as the base for the firing mechanism, firing mechanism, and other functional mechanisms, and is driven by a chain to complete automatic cycles. The firing pin 5 is located within the central hole of the firing pin sleeve 601; the sleeve assembly 6 passes through the firing frame 1, and the firing pin sleeve spring 2 and the firing pin spring 3 are installed between the sleeve assembly 6 and the firing frame 1. The firing pin sleeve spring 2 is positioned between the sleeve assembly 6 and the firing frame 1, and the firing pin spring 3 is positioned between the firing pin 5 and the firing frame 1. The firing pin stop block 4 is fixedly connected to the bolt carrier 1, providing axial movement limitation for the firing pin 5 and the sleeve assembly 6.

[0035] Combination Figure 3 , Figure 4 , Figure 5 The lever pivot pin 602 in the sleeve assembly 6 passes through the through hole at the bottom of the firing pin sleeve 601 and the through hole at the rear end of the firing pin lever 604, forming a pivot pair, allowing the firing pin lever 604 to rotate around the lever pivot pin 602. One end of the lever spring 603 is placed in the spring positioning countersunk hole 601c at the bottom front of the firing pin sleeve 601, and the other end is embedded in the spring limiting groove 604b at the front end of the firing pin lever 604. Symmetrically, protruding latches 604d are provided on both sides of the rear end of the firing pin lever 604. When the firing pin lever 604 rotates to a certain angle, the latches 604d contact the bottom surface of the firing pin sleeve 601, playing a limiting role and preventing the firing pin lever 604 from rotating too much. The lever spring 603 is always in a compressed state within the rotation angle range, providing downward pressure to the front end of the firing pin lever 604. This causes the upper flange 604a at the rear end of the firing pin lever 604 to pass through the lower groove 601b of the firing pin sleeve 601 and extend into the needle sleeve 601, where it mates with the front end face of the annular boss on the rear side of the firing pin, serving as the sear of the firing pin 5.

[0036] A semi-circular boss is provided at the upper end of the tail of the firing pin sleeve 601. When the firing pin sleeve 601 is inserted into the bolt carrier 1, the lower end face 601a of the semi-circular boss cooperates with the upper surfaces on both sides of the bolt carrier 1 to restrict the axial rotation of the firing pin sleeve 601.

[0037] Combination Figure 2 , Figure 5 , Figure 6 , Figure 7The bolt carrier 1 has symmetrical guide grooves 1a running through it on its left and right sides, which cooperate with the guide rails on the receiver to provide constraint and guidance for the automatic cycle of the automatic mechanism assembly. The stepped countersunk hole 1b at the rear center position serves as a mounting limit groove for the firing pin sleeve spring 2 and the firing pin spring 3, preventing the springs from disengaging during automatic cycle. A semi-circular boss 1c protruding from the front of the firing pin sleeve 601 mounting space extends from the front end face of the bolt carrier 1, blocking the lever rotation pin 602 even when the sleeve assembly 6 is at the very front, preventing the rotation pin 602 from falling off during automatic cycle. The bolt carrier 1 has a countersunk groove running from the front to the middle rear, serving as a movement space for the sleeve assembly 6.

[0038] During the recoil process, the arc surface 1d at the lower front end of the bolt carrier 1 contacts the lower arc surface 604c of the firing pin lever 604, pushing the firing pin lever 604 upward and compressing the lever spring 603. This causes the upper flange 604a of the firing pin lever 604 to rotate downward and disengage from the hole in the middle of the firing pin sleeve 601, thereby releasing the firing pin 5 to complete firing. The hole in the middle of the firing pin sleeve 601 serves as the moving track for the firing pin 5. Annular bosses are provided on both the front and rear sides of the firing pin 5. These annular bosses are in clearance fit with the moving track inside the firing pin sleeve 601. The lower end of the firing pin stop 4 is located between the two annular bosses, limiting the extension and retraction position of the firing pin 5.

[0039] The organization's working process is as follows:

[0040] Combination Figure 7 During the forward and backward recoil phases, the firing pin stop 4 is fixed to the bolt carrier 1 and extends into the moving track of the firing pin 5 inside the bolt carrier 601 through the slot on the upper part of the firing pin sleeve 601. The firing pin sleeve spring 2 and the firing pin spring 3 installed on the bolt carrier 1 respectively push the sleeve assembly 6 and the firing pin 5 forward so that they abut against the firing pin stop 4, and the firing pin stop 4 restricts the forward movement of the firing pin 5 and the sleeve assembly 6.

[0041] Combination Figure 5 , Figure 6 , Figure 8 , Figure 9 , Figure 10With the bolt carrier's forward movement as the origin and the forward direction as the positive direction, when the bolt carrier 1 returns to its forward position, the front face of the firing pin sleeve 601 abuts against the receiver. As the bolt carrier 1 continues to move forward, it compresses the firing pin sleeve spring 2. The force exerted by the firing pin sleeve spring 2 on the firing pin sleeve 601 continuously increases. The sleeve assembly 6, constrained by the receiver and the force of the rear firing pin sleeve spring, remains stationary at its forward position, providing a stable firing position and firing dwell time to ensure consistent firing timing. Furthermore, the upper flange 604a of the firing pin lever 604 abuts against the rear annular boss of the firing pin 5, switching the limiting component for the firing pin 5 from the firing pin stop 4 to the firing pin lever 604, thus restricting the forward movement of the firing pin 5. As the bolt carrier 1 continues to move forward, it further compresses the firing pin spring 3, increasing its elastic potential energy and accumulating energy for the firing of the firing pin 5. The front arc surface 1d of the bolt carrier 1 contacts the lower arc surface 604c of the firing pin lever 604 to replace the trigger function in the conventional firing mechanism. The firing pin lever 604 is pushed upward to compress the lever spring 603. The upper flange 604a at the rear end, which replaces the sear, gradually rotates downward, and the contact area between the end face and the rear annular boss of the firing pin 5 gradually decreases.

[0042] As the bolt carrier 1 returns to its forward position and approaches its foremost point, the firing pin lever 604 continues to rotate until it is completely out of the firing pin movement space in the middle of the firing pin sleeve 601, driven by the arc surface 1d at the front of the bolt carrier 1. The contact area between the upper flange 604a of the firing pin lever 604 and the annular boss on the rear side of the firing pin 5 is zero. Under the action of the firing pin spring 3, the firing pin 5 is released forward, and the tip of the firing pin passes through the receiver hole, striking the primer of the bullet to complete the firing. The countersunk end face of the receiver abuts against the end face of the annular boss at the front of the firing pin 5 to limit the maximum protrusion of the firing pin. Through this sleeve assembly 6 and its cooperation with other components, the core functions of the traditional firing and launching mechanisms are realized, integrating the separate firing and launching mechanisms into a whole, simplifying the complexity of the mechanism's actions and the number of parts. Other functions of the traditional firing and launching mechanisms, such as safety features and single / automatic firing switching, are achieved by the characteristics of the externally powered weapon itself, thus avoiding redundancy in structural functions.

[0043] Combination Figure 5 , Figure 11In the initial recoil phase, the bolt carrier begins to move rearward, and the distance between the stepped countersunk hole 1b of the bolt carrier 1 and the rear end face of the firing pin sleeve gradually increases. The firing pin sleeve spring 2 begins to gradually extend, but still provides a forward force to the firing pin sleeve 601. Due to the force of the firing pin sleeve spring 2, the sleeve assembly 6 remains stationary against the receiver at the foremost end during the initial recoil phase. The firing pin stop 4, fixed on the bolt carrier 1, causes the firing pin 5 to recoil backward along with the bolt carrier 1. The annular boss at the rear of the firing pin 5 presses down on the upper flange 604a of the firing pin lever 604, causing it to rotate slightly downward. After the annular boss at the rear of the firing pin 5 passes the upper flange 604a of the firing pin lever 604, the upper flange 604a of the firing pin lever 604 is no longer obstructed by the annular boss of the firing pin 5. The recoil displacement of the bolt carrier 1 also causes the lower front arc surface 1d to disengage from the lower arc surface 604c of the firing pin lever 604. With no obstruction, the firing pin lever 604 rotates downward under the downward force of the lever spring 603, completing the reset of the firing mechanism. During the continued recoil of the bolt carrier 1, the firing pin stop 4 contacts the firing pin sleeve 601, causing the firing pin sleeve 601 to recoil as well. Return to the state of the initial and final stages of the recovery phase.

Claims

1. An automatic firing mechanism suitable for double-chain externally powered firearms, characterized in that, include: The bolt carrier, in conjunction with the receiver, completes the recoil reset of the automatic firing mechanism after firing. The firing pin sleeve is fitted inside the bolt carrier and extends out of the front end face of the bolt carrier. It is used to provide a stable firing space and firing dwell time for the firing pin. This firing space also serves as the mating space between the firing pin lever assembly and the firing pin. The firing pin, located inside the firing pin sleeve, is used to strike the primer of the ammunition after release, igniting the propellant; A limiting module mounted on the bolt carrier is used to axially limit the firing pin and firing pin sleeve; The firing pin lever assembly, acting as the sear of the firing pin, is used to lock the position of the firing pin and can release the firing pin during the forward movement of the bolt carrier and reset it during the recoil movement of the bolt carrier. A firing pin sleeve spring is provided between the bolt carrier and the firing pin sleeve to ensure that the firing pin sleeve always extends out of the front end of the bolt carrier, so that the front end of the firing pin sleeve can abut against the receiver during recoil; and to reset the firing pin sleeve during the recoil process after firing. The firing pin spring, located between the bolt carrier and the firing pin, stores elastic potential energy for the firing pin during the bolt carrier's return motion. After the firing pin lever assembly releases the firing pin, it pushes the firing pin to strike the primer of the bullet, thus completing the firing.

2. The automatic firing mechanism according to claim 1, characterized in that, The firing pin lever assembly includes a lever pivot pin, a lever spring, and a firing pin lever; The rear end of the firing pin lever is rotatably connected to the bottom of the firing pin sleeve via a lever pivot pin, and a lever spring is provided between the front end and the bottom of the firing pin sleeve. The lower end of the firing pin sleeve has a lower groove, and under the action of the lever spring, the rear end of the firing pin lever engages upward with the firing pin. Symmetrically protruding latches are provided on both sides of the rear end of the firing pin lever to contact the bottom surface of the firing pin sleeve and limit the rotation angle of the firing pin lever. The lower side of the front end of the firing pin lever has a lower arc surface that can contact the arc surface of the front end of the bolt carrier. During the bolt carrier's recoil process, the lever spring is compressed, causing the firing pin lever to rotate and complete the separation from the firing pin.

3. The automatic firing mechanism according to claim 2, characterized in that, The front end face of the bolt carrier is provided with a semi-circular boss that protrudes into the firing pin sleeve mounting space to block the lever rotation pin and prevent the rotation pin from falling off.

4. The automatic firing mechanism according to claim 1, characterized in that, The upper end of the firing pin sleeve is provided with a semi-circular boss. When the firing pin sleeve is inserted into the bolt carrier, the lower end face of the semi-circular boss cooperates with the upper surfaces on both sides of the bolt carrier to restrict the axial rotation of the firing pin sleeve.

5. The automatic firing mechanism according to claim 1, characterized in that, The firing pin has annular protrusions on both the front and rear sides. The annular protrusions are fitted with the firing pin sleeve with a clearance. The lower end of the limiting module is located between the two annular protrusions to limit the extension and retraction position of the firing pin.

6. The automatic firing mechanism according to claim 1, characterized in that, The limiting module uses a firing pin stop, which is fixed on the bolt carrier and extends into the sleeve through a slot on the upper part of the firing pin sleeve.

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