An acceptance test bench and acceptance method for a firearm projectile counter

Abstract

This invention discloses an acceptance test bench and method for a firearm projectile counter. It allows for a simple, quick, and effective acceptance test of the firearm projectile counter before it is assembled into a firearm, without the need for live-fire testing. The acceptance test bench includes a base with side rods and side plates erected on it. A pendulum rod is vertically connected to the upper part of the side rods and side plates, and a pendulum is hinged to the pendulum rod. The free end of the pendulum is a hammer head. A firearm projectile counter connecting platform is fixed on the base. The hammer head of the pendulum is correspondingly positioned to strike the firearm projectile counter connecting platform, simulating the recoil impulse generated by a firearm projectile.

Description

Technical Field

[0001] This invention relates to the field of firearms technology, and in particular to an acceptance test bench and acceptance method for a firearm projectile counter. Background Technology

[0002] As is well known, firearms have a limited lifespan. Once a firearm exceeds its lifespan, its accuracy and reliability will significantly decrease. Continued use may prevent it from achieving its intended combat purpose and could potentially cause personal injury to the shooter or friendly firearms. Therefore, accurately controlling the number of rounds fired is essential during firearm use.

[0003] The acceptance testing of firearm projectile counters typically involves sampling and live-fire testing. However, this method has several drawbacks. First, the sample size is limited, failing to guarantee the reliable operation of all counters installed on firearms. Second, the acceptance process is inefficient, requiring the use of firearms and ammunition, preparation of a firing range, and live-fire testing, which involves cumbersome procedures and is time-consuming. Third, the acceptance cost is high, with significant consumption of firearms, ammunition, and human resources during the process. Fourth, the problem-solving cycle for unsuccessful acceptance is lengthy. Generally, projectile counters are assembled into firearms immediately after leaving the factory, and then sampled for acceptance testing in batches. If reliability issues are found during acceptance, the counters must be disassembled in batches to identify the cause, develop solutions, verify the resolution, and reassemble them into the firearms, resulting in a lengthy and costly process.

[0004] In conclusion, it is essential to invent a simple, quick, and effective method for accepting firearm projectile counters before they are assembled into a complete firearm, without the need for live-fire testing. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an acceptance test bench and acceptance method for a firearm projectile counter. This method allows for a simple, quick and effective acceptance test of the firearm projectile counter before it is assembled into a complete firearm, without the need for live-fire testing.

[0006] The objective of this invention is achieved as follows:

[0007] An acceptance test bench for a firearm projectile counter includes a base, on which a side rod and a side plate are erected. A pendulum rod is vertically connected to the upper part of the side rod and the side plate. A pendulum is hinged to the pendulum rod, and the free end of the pendulum is a hammer head. A firearm projectile counter connecting platform is fixed on the base. The hammer head of the pendulum is correspondingly set with the firearm projectile counter connecting platform and is used to strike the firearm projectile counter connecting platform to simulate the recoil impulse generated by the firearm projectile.

[0008] Preferably, the pendulum rod includes a left pendulum rod and a right pendulum rod.

[0009] The upper part of the side rod is provided with a radial mounting hole for the left pendulum rod, and the top of the side rod is provided with a threaded hole for a screw that limits the rotation of the left pendulum rod. One end of the left pendulum rod is provided with an anti-rotation hole, and the other end of the left pendulum rod is provided with a pendulum limiting step and a threaded hole for connecting the right pendulum rod. The fixed end of the pendulum is provided with a rotation hole, and the rotation hole and the pendulum limiting step are fitted with a clearance to form a hinge. The end of the left pendulum rod with the anti-rotation hole extends into the mounting hole for the left pendulum rod. A screw that limits the rotation of the left pendulum rod is fitted into the threaded hole for the screw that limits the rotation of the left pendulum rod, and the end of the screw that limits the rotation of the left pendulum rod extends into the anti-rotation hole for the left pendulum rod to position the left pendulum rod.

[0010] The upper end of the side plate is provided with a mounting hole for the right pendulum rod. One end of the right pendulum rod fits into the mounting hole. This end of the right pendulum rod is provided with a square step to form an axial positioning of the right pendulum rod. The other end of the right pendulum rod is provided with a connecting thread for the left pendulum rod. The connecting thread for the left pendulum rod is threadedly engaged with the connecting thread hole for the right pendulum rod to fix it, thereby limiting the movement of the pendulum.

[0011] Preferably, the base is provided with a side rod connection interface, a side plate connection interface, and a gun bullet counter connection table mounting threaded hole. The side rod is embedded in the side rod connection interface and welded and fixed, and the side plate is embedded in the side plate connection interface and welded and fixed.

[0012] The pendulum has a rocker arm that is perpendicular to the side rod and the side plate. The side plate has an arc-shaped groove for operating the pendulum arm, and the rocker arm passes through the arc-shaped groove for operating the pendulum arm. The side plate has an observation hole for observing the working status of the pendulum arm.

[0013] The end of the joystick is provided with an indicator mark, and the arc-shaped groove is provided with a maximum recoil impulse mark and a minimum recoil impulse mark.

[0014] Preferably, the total weight of the pendulum, the length of the pendulum arm, and the swing opening angle are initially determined by calculation and then calibrated by experiment.

[0015] Preferably, the recoil impulse of the firearm in different states is measured by live-fire shooting to obtain the maximum and minimum recoil impulse data of the firearm.

[0016] Preferably, the gun projectile counter connecting platform is U-shaped, with a base connecting hole on the lower plate and a gun projectile counter connecting hole on the upper plate. The back plate of the gun projectile counter connecting platform is for the impact of the pendulum hammer head, and the internal space of the gun projectile counter connecting platform is used to accommodate the gun projectile counter.

[0017] A method for accepting a firearm bullet counter, comprising the following steps:

[0018] S1. Live-fire shooting measures the recoil impulse of the firearm in different states, and obtains the maximum and minimum recoil impulse data of the firearm.

[0019] S2. Design of a firearm bullet counter acceptance test bench

[0020] Using the test data obtained in step S1, and combining the principle of impulse consistency, a test bench for accepting firearm projectile counters is designed. The pendulum parameters and the height of the pendulum when the maximum and minimum recoil impulses of the firearm are reached are initially obtained through calculation. Then, the test is calibrated, and the maximum and minimum recoil impulse markers of the firearm are set accordingly.

[0021] S3. Acceptance of Firearm Ammunition Counter

[0022] First, fix the firearm bullet counter that needs to be inspected on the firearm bullet counter inspection test bench, and read the firearm bullet counter data with a card reader;

[0023] Then, the pendulum is operated to strike the gun projectile counter connection table at multiple positions below the minimum impulse mark. The gun projectile counter data is read by a card reader, but it cannot count.

[0024] Finally, select multiple locations between the minimum impulse mark and the maximum impulse mark to strike the gun projectile counter connection table, and use a card reader to read the gun projectile counter data. If it can count effectively, then the acceptance is qualified.

[0025] Preferably, in step S1, based on the actual use of the firearm, after the firearm and ammunition have been kept at a constant temperature for two hours in different temperature environments, the recoil impulse of a set sample of firearms under different weights when various tactical accessories are installed is tested to obtain the maximum and minimum recoil impulse data of the firearm.

[0026] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0027] Utilizing the counting principle of a firearm projectile counter—which achieves accurate counting by sensing the recoil impulse during live-fire—and combining this with the impact stability of a pendulum at a certain angle, the reliability of the firearm projectile counter can be accurately determined without conducting live-fire tests. This significantly reduces the acceptance cost of firearm projectile counters and improves acceptance efficiency. It ensures the reliability of products assembled into finished firearms and has significant promotional and practical value in the production and acceptance of firearm projectile counters. Widespread application of this technology will generate substantial economic and social benefits. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the firearm projectile counter acceptance test bench;

[0029] Figure 2a This is a schematic diagram of the pendulum at the minimum impulse position on the acceptance test bench for firearm projectile counters.

[0030] Figure 2b This is a schematic diagram of the pendulum at the maximum impulse position on the acceptance test bench for firearm projectile counters;

[0031] Figure 3 This is a schematic diagram of the base structure;

[0032] Figure 4 This is a schematic diagram of the side rod structure;

[0033] Figure 5 This is a schematic diagram of the side panel structure;

[0034] Figure 6 This is a schematic diagram of the left shaft of the pendulum;

[0035] Figure 7 This is a schematic diagram of the right arm of the pendulum.

[0036] Figure 8 This is a schematic diagram of the pendulum structure;

[0037] Figure 9 This is a schematic diagram of the gun ammunition counter connection platform.

[0038] Figure 10 This is a partial structural diagram of the pendulum left rod, pendulum, and pendulum right rod after installation. Detailed Implementation

[0039] The invention will be further described below with reference to the accompanying drawings. In the drawings, 1-base, 11-side rod connection interface, 12-side plate connection interface, 13-gun projectile counter connection table mounting threaded hole; 2-side rod, 21-pendulum left rod mounting hole, 22-pendulum left rod rotation limiting screw threaded hole; 3-side plate, 31-pendulum right rod mounting hole, 32-weight reduction hole, 33-swing arm operation arc groove, 34-observation hole, 35-gun maximum recoil impulse marker point, 3 6-Minimum recoil impulse marker for firearm; 4-Left pendulum rod, 41-Anti-rotation hole, 42-Pendulum limiting step, 43-Right pendulum rod connecting threaded hole; 5-Right pendulum rod, 51-Square step, 52-Left pendulum rod connecting thread; 6-Pendulum, 61-Rotation hole, 62-Rock arm, 621-Indicator mark, 63-Hammer head; 7-Firearm projectile counter connecting platform, 71-Firearm projectile counter connecting hole, 72-Base connecting hole, 8-Firearm projectile counter.

[0040] A method for accepting a firearm bullet counter, comprising the following steps:

[0041] S1. Live-fire shooting to measure the recoil impulse of the firearm under different conditions.

[0042] The recoil impulse of a firearm is related to the weight of the firearm (with various tactical accessories) and the temperature of the environment in which it is used. Based on the actual use of the firearm, the recoil impulse of a certain sample of firearms with different weights when various tactical accessories are installed was tested after the firearm and ammunition were kept at a constant temperature for two hours in high temperature (60℃) and low temperature (-45℃) environments, respectively, to obtain the maximum and minimum recoil impulse data of the firearm.

[0043] S2. Design of a firearm bullet counter acceptance test bench

[0044] Using the data obtained from the above experiments, and combining the principle of impulse consistency of the pendulum at a certain angle, a gun firing counter test bench was designed. The weight of the pendulum and the height of the pendulum when the maximum and minimum recoil impulse of the gun were reached were calculated. The test bench includes: a base 1, a side rod 2, a side plate 3, a left pendulum rod 4, a right pendulum rod 5, a pendulum 6, and a gun firing counter connecting platform 7.

[0045] like Figure 3 As shown, the base is the foundation of the entire test bench. It is provided with a side rod connection interface 11 and a side plate connection interface 12. The side rods and side plates are reinforced by welding after being installed on the base. The base is also provided with three gun projectile counter mounting threaded holes 13 for mounting the gun projectile counter mounting table with standard screws.

[0046] like Figure 4 As shown, the side rod is used to support the left pendulum rod. One end of the side rod is mounted on the base, and after installation, the rod body is perpendicular to the base; the other end is provided with a threaded hole 22 for limiting the rotation of the left pendulum rod, which is used to install a standard screw to limit the rotation of the left pendulum rod; a mounting hole 21 for the left pendulum rod is provided near the threaded hole for mounting the left pendulum rod.

[0047] like Figure 5 As shown, the side plate supports the right pendulum rod and also serves as the operating interface for the entire test bench. One end of the side plate is mounted on the base, and after installation, the plate surface is perpendicular to the base and fixed by welding. The other end is provided with a pendulum rod mounting hole 31 for mounting the right pendulum rod. It is provided with two rectangular holes, the smaller hole being a weight reduction hole 32 and the larger hole being an observation hole 34. Below the weight reduction hole is a swing arm operation arc groove 33 for operating the pendulum swing. Two marking lines are provided on the arc groove, which, after calculation and experimental calibration, correspond to the maximum recoil impulse marking point 35 and the minimum recoil impulse marking point 36 of the firearm, respectively.

[0048] like Figure 1 , Figure 6 , Figure 7 , Figure 8 , Figure 10 As shown:

[0049] The left and right pendulum rods are assembled to support the pendulum. The left pendulum rod is provided with an anti-rotation hole 41, a pendulum limiting step 42, and a connecting threaded hole 43 for the right pendulum rod. The left pendulum rod is passed through the mounting hole on the side rod, the anti-rotation hole is aligned with the threaded hole of the limiting screw on the side rod, and a standard screw is tightened to prevent the left pendulum rod from rotating.

[0050] The right and left pendulum rods are assembled to support the pendulum. One end of the right pendulum rod is provided with a square step 51 for tightening the right pendulum rod and limiting its position, while the other end is provided with a connecting thread 52 for the left pendulum rod.

[0051] The main function of the pendulum is to generate a corresponding impulse on the counter by swinging and striking the gun's projectile counter connecting platform. The overall weight of the pendulum, the length of the pendulum arm, and the swing opening angle are preliminarily determined through calculation. The pendulum is provided with a rotating hole 61 to fix the pendulum between the left and right pendulum rods, allowing it to rotate around the axis and limiting its left and right movements; a rocker arm 62 is provided on the pendulum arm to operate the pendulum's swing; an indicator mark 621 is provided on the end face of the rocker arm, the indicator mark is in a straight line with the pendulum arm, and combined with the marking points on the arc groove of the side plate, it guides the operation.

[0052] When installing the pendulum, first fit the pendulum rotating platform hole onto the pendulum limiting step of the installed left pendulum rod. When fitting, the rocker arm on the pendulum arm points towards the side plate to support the pendulum. Then, pass the right pendulum rod screw end through the right pendulum rod mounting hole from the outside of the side plate and screw the screw into the threaded hole of the left pendulum rod until it is fully tightened. After tightening, the square step on the right pendulum rod is basically in contact with the side plate.

[0053] like Figure 9 As shown, the upper surface of the gun projectile counter connecting platform is provided with three chamfered gun projectile counter connecting holes 71 for fixing the gun projectile counter with standard screws during the test, and the lower surface is provided with three base connecting holes 72 for fixing the gun projectile counter connecting platform to the base with standard screws.

[0054] S3. Acceptance of Firearm Ammunition Counter

[0055] like Figures 1 to 3As shown, first, the firearm projectile counter to be inspected is fixed to the pre-calibrated firearm projectile counter acceptance test bench using standard screws, and the firearm projectile counter data is read using a card reader. Then, the pendulum is operated to strike the firearm projectile counter connecting platform at any of five locations below the minimum impulse mark, and the firearm projectile counter data is read using the card reader; no counting occurs. Finally, the firearm projectile counter connecting platform is struck at any of ten locations between the minimum and maximum impulse marks, and the firearm projectile counter data is read using the card reader; it counts effectively. During operation, attention must be paid to the pendulum's rebound to ensure that only one effective impact occurs each time.

[0056] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A method for accepting a firearm bullet counter, characterized in that, This method includes the following steps: S1. Live-fire shooting measures the recoil impulse of the firearm in different states, and obtains the maximum and minimum recoil impulse data of the firearm. S2. Design of a firearm bullet counter acceptance test bench Using the test data obtained in step S1, and combining the impulse consistency principle, a test bench for accepting firearm projectile counters is designed. The test bench for accepting firearm projectile counters includes a base, on which a side rod and a side plate are erected. A pendulum rod is vertically connected to the upper part of the side rod and the side plate. A pendulum is hinged to the pendulum rod, and the free end of the pendulum is the hammer head. A firearm projectile counter connecting platform is fixed on the base. The hammer head of the pendulum is correspondingly set with the firearm projectile counter connecting platform and is used to strike the firearm projectile counter connecting platform. The pendulum parameters and the height of the pendulum when the maximum and minimum recoil impulses of the firearm are reached are obtained through calculation. Then, the parameters are calibrated through experiments, and the maximum and minimum recoil impulse markers of the firearm are set accordingly. S3. Acceptance of firearm bullet counter First, fix the firearm bullet counter that needs to be inspected on the firearm bullet counter inspection test bench, and read the firearm bullet counter data with a card reader; Then, the pendulum is operated to strike the gun projectile counter connection table at multiple positions below the minimum impulse mark. The gun projectile counter data is read by a card reader, but it cannot count. Finally, select multiple locations between the minimum impulse marker and the maximum impulse marker to impact the gun projectile counter connection platform. Use a card reader to read the gun projectile counter data. If it can count effectively, the acceptance is qualified.

2. The acceptance method for a firearm bullet counter according to claim 1, characterized in that: The pendulum rod includes a left pendulum rod and a right pendulum rod. The upper part of the side rod is provided with a radial mounting hole for the left pendulum rod, and the top of the side rod is provided with a threaded hole for a screw that limits the rotation of the left pendulum rod. One end of the left pendulum rod is provided with an anti-rotation hole, and the other end of the left pendulum rod is provided with a pendulum limiting step and a threaded hole for connecting the right pendulum rod. The fixed end of the pendulum is provided with a rotation hole, and the rotation hole and the pendulum limiting step are fitted with a clearance to form a hinge. The end of the left pendulum rod with the anti-rotation hole extends into the mounting hole for the left pendulum rod. A screw that limits the rotation of the left pendulum rod is fitted into the threaded hole for the screw that limits the rotation of the left pendulum rod, and the end of the screw that limits the rotation of the left pendulum rod extends into the anti-rotation hole for the left pendulum rod to position the left pendulum rod. The upper end of the side plate is provided with a mounting hole for the right pendulum rod. One end of the right pendulum rod fits into the mounting hole. This end of the right pendulum rod is provided with a square step to form an axial positioning of the right pendulum rod. The other end of the right pendulum rod is provided with a connecting thread for the left pendulum rod. The connecting thread for the left pendulum rod is threadedly engaged with the connecting thread hole for the right pendulum rod to fix it, thereby limiting the movement of the pendulum.

3. The acceptance method for a firearm bullet counter according to claim 1, characterized in that: The base is provided with a side rod connection interface, a side plate connection interface, and a gun bullet counter connection table mounting threaded hole. The side rod is embedded in the side rod connection interface and welded and fixed, and the side plate is embedded in the side plate connection interface and welded and fixed.

4. The acceptance method for a firearm bullet counter according to claim 1, characterized in that: The pendulum has a rocker arm that is perpendicular to the side rod and the side plate. The side plate has an arc-shaped groove for operating the pendulum arm, and the rocker arm passes through the arc-shaped groove for operating the pendulum arm. The side plate has an observation hole for observing the working status of the pendulum arm. The end of the joystick is provided with an indicator mark, and the arc-shaped groove is provided with a maximum recoil impulse mark and a minimum recoil impulse mark.

5. The acceptance method for a firearm bullet counter according to claim 1, characterized in that: The gun projectile counter connection platform is U-shaped. The lower plate of the gun projectile counter connection platform is provided with a base connection hole, and the upper plate of the gun projectile counter connection platform is provided with a gun projectile counter connection hole. The back plate of the gun projectile counter connection platform is used for the impact of the pendulum hammer head. The internal space of the gun projectile counter connection platform is used to accommodate the gun projectile counter.

6. The acceptance method for a firearm bullet counter according to claim 1, characterized in that: In step S1, based on the actual use of the firearm, after the firearm and ammunition have been kept at a constant temperature for two hours in different temperature environments, the recoil impulse of the firearm with a set sample size under different weights when various tactical accessories are installed is tested, and the maximum and minimum recoil impulse data of the firearm are obtained.

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