A collision momentum adjustable impact fatigue testing machine

Abstract

This invention discloses an impact fatigue testing machine with adjustable impact momentum, comprising a machine body, a separable sinusoidal loading module, a firearm fixture module, a parts fixture module, a lifting module, a drive module, and an outer protective shield. The sinusoidal loading mechanism is mounted on the right platform of the machine body. The firearm fixture module and the parts fixture module are fixed on the left platform. The lifting module is symmetrically installed below the left platform, and the drive module is symmetrically installed below the right platform. A crank is mounted on the output shaft of the drive module, and the crank is connected to the sinusoidal module. The outer protective shield is connected to the ground. This invention utilizes the separable sinusoidal mechanism and the compression and release of the energy storage spring to achieve high-impact, high-frequency impact fatigue testing on parts or firearms. During impact, the impact structure separates from the drive module, effectively reducing impact damage to the motor. The height of the operating platform can be adjusted via the lifting module to accommodate parts and firearms of different sizes.

Description

Technical Field

[0001] This invention pertains to testing equipment, specifically a collision momentum adjustable impact fatigue testing machine that can be used for repeated high-impact, high-frequency impact tests. Background Technology

[0002] The firing cycle of an automatic weapon includes: firing, firing, unlocking, extraction, ejection, feeding, loading, and locking. During most of these processes, each component is subjected to a certain impact load, characterized by high load intensity and short duration. For example, the locking mechanism must withstand the pressure of the propellant gases during firing, and also bear significant restraint reaction forces during unlocking and locking. Upon recoil, it will also collide with other components. The rate of fire of automatic weapons is generally between 400 and 2000 rounds per minute, with propellant gas erosion velocities reaching 1800 m / s. Under high-frequency variable loads, fatigue failure is the primary failure mode. Therefore, determining the fatigue life of automatic weapons has always been a key issue in firearm design.

[0003] Currently, fatigue life determination for automatic weapons mainly relies on live-fire testing, which consumes significant manpower and resources. Existing literature reports that impact fatigue testing devices primarily employ hydraulic reset systems, requiring high maximum flow rates from servo valves and high power from drive motors, low impact frequencies, high costs, and complex structures. Meanwhile, impact fatigue testing machines with higher impact frequencies often use cams as the loading and reset mechanism. During operation, the cams collide with other mechanisms, leading to unstable loading. If belt pulley drives are used, slippage under high-frequency impacts results in unstable transmission speed and low transmission efficiency.

[0004] Therefore, it is not difficult to find that existing impact fatigue testing machines have mutual constraints on the two indicators of impact frequency and impact force. That is, high-frequency impact fatigue testing machines generally have smaller impact forces and can only be used for testing individual parts, while testing machines with large impact forces have very low impact frequencies and can even only complete a single impact test. Summary of the Invention

[0005] The purpose of this invention is to provide an impact fatigue testing machine with adjustable impact momentum. In view of the technical problems existing in the prior art, such as the inability to simultaneously meet the requirements of impact force and impact frequency, unstable loading during repeated impacts, and low transmission efficiency, the purpose of this invention is to provide an impact fatigue testing machine with large impact force, high impact frequency, and adjustable impact force.

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

[0007] An impact fatigue testing machine with adjustable impact momentum, comprising:

[0008] The fuselage has high and low positions; the low position is used to install the lifting module, gun clamp module or parts clamp module; the high position is used to install the drive module and sine loading module.

[0009] Firearm clamping module or parts clamping module, used to clamp firearms or firearm parts;

[0010] The lifting module is used to drive the lifting action of the firearm fixture module or the parts fixture module, so as to adjust the height of the firearm parts or firearm under test, and adjust the height of the firearm parts or firearm under test to be level with the center line of the punch.

[0011] The separate sinusoidal loading module includes: a sinusoidal support, serving as a guide mechanism for the punch slide and a mounting mechanism for the monitoring and adjustment device; a monitoring and adjustment device, used to store the elastic potential energy of the punch slide and to adjust the impact force by adjusting the elastic potential energy; a stop platform, serving as a guide mechanism for the sinusoidal mechanism's movement, limiting the horizontal and vertical positions of the sinusoidal mechanism, and enabling the punch slide to separate from the sinusoidal mechanism when it moves backward with the sinusoidal mechanism to a predetermined stroke; a punch slide, serving as the action mechanism for impact fatigue testing, capable of engaging with the sinusoidal mechanism when it moves forward; and a sinusoidal mechanism, in cooperation with the drive module, capable of reciprocating linearly along the stop platform under the drive of the drive module.

[0012] The drive module is used to convert its own rotational motion into linear reciprocating motion of a sinusoidal mechanism.

[0013] The significant advantages of this invention compared to existing technologies are:

[0014] (1) A separate sinusoidal loading module is adopted. The sinusoidal mechanism and the punch slide are designed separately. When it moves to the predetermined position, the hanging iron connecting the two mechanisms is released through the stop frame to realize the separation of the mechanism. The punch slide completes the impact action alone, which greatly reduces the vibration transmitted to the main shaft and motor and improves the life of the fatigue testing machine. (2) The loading module of the impact fatigue testing machine with adjustable collision momentum adopts a sinusoidal mechanism, which greatly reduces the collision in the transmission process, makes the operation stable and reliable, and realizes the function of multiple repeated impacts. The maximum frequency can reach 1200 times per minute. (3) Two energy storage springs are used for energy storage. The collision momentum can be adjusted by adjusting the double nuts at the rear end of the springs. The maximum impact force can reach 250000N. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the impact fatigue testing machine with adjustable collision momentum according to the present invention.

[0016] Figure 2 This is a front view of the impact fatigue testing machine with adjustable collision momentum of the present invention (with gun clamp module installed).

[0017] Figure 3 This is a front view of the impact fatigue testing machine with adjustable collision momentum of the present invention (installation part fixture module).

[0018] Figure 4 This is a schematic diagram of the overall external protection structure of the impact fatigue testing machine with adjustable collision momentum according to the present invention.

[0019] Figure 5 This is a front view of the body of the impact fatigue testing machine with adjustable collision momentum according to the present invention.

[0020] Figure 6 This is a schematic diagram of the gun fixture module of the impact fatigue testing machine with adjustable impact momentum of the present invention.

[0021] Figure 7 This is a schematic diagram of the gun tail fixing device of the impact fatigue testing machine with adjustable impact momentum of the present invention.

[0022] Figure 8 This is a schematic diagram of the gun body fixing device of the impact fatigue testing machine with adjustable impact momentum of the present invention.

[0023] Figure 9 This is a schematic diagram of the frame fixing device of the impact fatigue testing machine with adjustable impact momentum according to the present invention.

[0024] Figure 10 This is a schematic diagram of the lifting module of the impact fatigue testing machine with adjustable collision momentum of the present invention.

[0025] Figure 11 This is a schematic diagram of the structure of the separate sinusoidal loading module of the impact fatigue testing machine with adjustable collision momentum of the present invention.

[0026] Figure 12 This is a schematic diagram of the sinusoidal support of the impact fatigue testing machine with adjustable impact momentum of the present invention.

[0027] Figure 13 This is a schematic diagram of the punch slide of the impact fatigue testing machine with adjustable impact momentum of the present invention.

[0028] Figure 14 This is a cross-sectional view of the punch slide of the impact fatigue testing machine with adjustable impact momentum of the present invention.

[0029] Figure 15 This is a schematic diagram of the sinusoidal mechanism of the impact fatigue testing machine with adjustable collision momentum of the present invention.

[0030] Figure 16 This is a schematic diagram of the sine push rod of the impact fatigue testing machine with adjustable collision momentum of the present invention.

[0031] Figure 17This is a partial cross-sectional view of the sinusoidal mechanism of the impact fatigue testing machine with adjustable impact momentum of the present invention.

[0032] Figure 18 This is a schematic diagram of the stand of the impact fatigue testing machine with adjustable impact momentum of the present invention.

[0033] Figure 19 This is a schematic diagram of the monitoring and adjustment device of the impact fatigue testing machine with adjustable collision momentum of the present invention.

[0034] Figure 20 This is a schematic diagram of the drive module of the impact fatigue testing machine with adjustable collision momentum according to the present invention.

[0035] Figure 21 This is a schematic diagram of the part fixture module of the impact fatigue testing machine with adjustable impact momentum of the present invention.

[0036] Figure 22 This is a schematic diagram of the part fixing device of the impact fatigue testing machine with adjustable impact momentum of the present invention.

[0037] Figure 23 This is a schematic diagram of the impact energy buffer of the impact fatigue testing machine with adjustable collision momentum of the present invention.

[0038] Figure 24 This is a cross-sectional view of the impact energy buffer of the impact fatigue testing machine with adjustable impact momentum of the present invention.

[0039] Figure 25 This is a schematic diagram of the external protection structure of the impact fatigue testing machine with adjustable collision momentum according to the present invention. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] Combination Figures 1 to 4 The present invention discloses an impact fatigue testing machine with adjustable impact momentum, comprising a machine body 1, a separable sinusoidal loading module 4, a gun clamping module 2, a lifting module 3, a drive module 5, a parts clamping module 6, and an outer protective shield 7. The gun clamping module 2 and the parts clamping module 6 are used when impacting the complete gun and parts, respectively, and the two modules are installed in the same position.

[0042] Combination Figure 5The fuselage 1 includes a left body frame 101, a left base platform 102, a right platform 103, a right body frame 104, a right base platform 105, and feet 106. The feet 106 are fixed to the four corners of the left base platform 102 and the right base platform 105, and secured to the ground with anchor bolts. The left body frame 101 is fixed to the left base platform 102; the right base platform 105 is fixed to the left base platform 102; the right body frame 104 is fixed to the right base platform 105; and the right platform platform 103 is fixed to the right body frame 104. The left body frame 101 is lower than the right platform platform 103, forming a high-low fuselage structure.

[0043] Combination Figures 6 to 9 The firearm clamp module 2 is mounted on the left platform 304 with a T-slot, and includes a bolt carrier fixing device 203, a receiver fixing device 202, and a buttstock fixing device 201. The bolt carrier fixing device 203 is mounted on the right side for fixing the front end of the firearm, and includes a cylinder mount 20301, a vertical cylinder 20302, a cylinder fixing plate 20303, and a self-centering vise 20304. The vertical cylinder 20302 is fixed to the cylinder fixing plate 20303. The cylinder fixing plate 20303 is fixed to the cylinder mount 20301. The cylinder mount 20301 is fixed in the T-slot of the left platform 304. The self-centering vise 20304 is fixed in the T-slot directly below the vertical cylinder 20302. The receiver fixing device 202 includes the self-centering cylinder 202. 01 and cylinder base 20202, two self-centering cylinders 20201 are symmetrically arranged about the center line of the left platform 304 and fixed to the cylinder base 20202; the gun tail fixing device 201 includes clamp base 20101, clamp guide rail 20102, clamp 20103, clamp guide rod 20104 and clamp slider 20105, the clamp 20103 is fixed to the clamp slider 20105 and is installed together with the slider 20105 on the clamp guide rail 20102, the clamp guide rod 20104 is fixed to the clamp slider 20104, the clamp guide rail 20102 is fixed to the clamp base 20101, and the clamp base 20101 is symmetrically installed in the T-slot of the left platform 304. During operation, first open the clamp 20103 to the relaxed state, then push the clamp guide rod 20104 forward to make it fit tightly against the rear end face of the gun breech, and finally lock the clamp 20103 to complete the clamping of the firearm. The firearm clamp module 2 is used to clamp and fix the firearm during the firearm impact fatigue test. The receiver fixing device 203 clamps the sides and top of the receiver through the self-centering vise 20304 and the vertical cylinder 20302. The receiver fixing device 202 clamps the sides of the receiver through a pair of self-centering cylinders 20201. The breech fixing device 201 clamps the rear of the breech through the clamp 20103.

[0044] Combination Figure 10The lifting module 3 includes a lifting platform 301, a guide column 302, a hand crank 303, a left platform 304, and a connecting device 305. The lifting module 3 is located between the left platform 304 and the left body frame 101. There are four lifting platforms 301 in total, located at the four corners of the left body frame 101. The lifting platforms 301 are interconnected through the connecting device 305 and couplings. The connecting device 305 has an input shaft (horizontal shaft) on its front and output shafts (vertical shafts) on both sides. The two shafts are arranged at 90°, and bevel gears are installed on each of the two shafts. The rotation of the lifting mechanism drives the output shaft to rotate synchronously through the bevel gear between the two shafts, thus transmitting torque and synchronizing lifting. The connecting shaft between the two lifting machines 301 on the front side is connected by a connecting device 305 and a coupling. The two lifting machines 301 on the back side are connected to the connecting shaft of the two lifting machines 301 on the front side only by a coupling. A hand crank 304 is installed at the end of the input shaft of the connecting device 305. When the handle is cranked, the output shaft of the connecting device 305 rotates, driving the lead screw in the lifting machine 301 to rotate, achieving synchronous lifting of the four lifting machines. Two guide pillars 302 are located between the left platform 304 and the left machine frame 101, serving to guide and withstand the radial impact force generated by the separate sinusoidal loading module 4. The lifting module 3 adjusts the height of the test part or weapon. By cranking the hand crank 303, the left platform can be raised or lowered, adjusting the height of the test part to be flush with the center line of the punch, thus conducting the impact fatigue test.

[0045] Combination Figures 11 to 19The separate sinusoidal loading module 4 includes a sinusoidal support 401, a punch slide 402, a sinusoidal mechanism 403, a stop platform 404, and a monitoring and adjustment device 405; the sinusoidal support 401 is fixedly connected to the right platform 103; the sinusoidal support includes a front support 40101, a guide rod 40102, and a rear support 40103; there are two guide rods 40102, which are parallel to and fixedly connected to the two holes of the front support 40101 and the rear support 40103, and the guide rods 40102 are... 102 has an external thread for installing the monitoring and adjustment device 405; the punch slide plate 402 is mounted on two guide rods 40102 and can slide on the guide rods 40102, including a punch 40201, a punch drive plate 40202, a lubricating copper sleeve 40203, a return slide 40204, a limit cover 40205, a slide base 40206, and a return spring 40207. The punch 40201 is fixed to the punch drive plate 40202, and the lubricating copper sleeve 40203... 0203 is installed in the sleeves on both sides of the punch drive plate 40202, and slides in cooperation with the guide rod 40102. The slider base 40206 is installed in the square hole of the punch drive plate 40202. The lower end of the recoil spring 40207 is installed on the protruding cylinder of the slider base 40206. The recoil slider 40204 is set inside the slider base 40206 and is located on the recoil spring 40207, and can slide up and down relative to the slider base 40206. The limit cover 4020... 5 is fixed to the slider base 40206 and is used to limit the return slider 40204 to prevent the return slider 40204 from separating from the slider base 40206; the upper end of the return slider 40204 is provided with an inclined surface for cooperating with the hanging iron 40301. When the hanging iron 40301 moves forward, it can press down on the return slider 40204 through the inclined surface and pass over the inclined surface. Under the action of the return spring 40207, the return slider 40204 rises and engages with the hanging iron 40301. The sine mechanism 403 includes a hanging iron 40301, a sine push rod 40302, a sine drive plate 40303, a vertical pulley 40304 (vertical in direction), and a horizontal pulley 40305 (horizontal in direction and perpendicular to the axial direction of the punch 40201); the sine push rod 40302 and the hanging iron 40301 are fixedly connected to the sine drive plate 40303, and the lower end of the tail of the sine push rod 40302 is provided with an elliptical groove (e.g., Figure 16(As shown), the crank 505 slides within the groove during rotation; the sine drive plate 40303 is used to mount the hanging iron 40301, sine push rod 40302, vertical pulley 40304, and horizontal pulley 40305, and performs linear reciprocating motion under the drive of the sine push rod 40302; there are 6 sets of vertical pulleys 40304, symmetrically installed in the round holes on both sides of the upper plane of the sine drive plate 40303, and fixed with 4 screws. During operation, the vertical pulleys 40304 slide on the sine guide rail 40305. The upper single-sided sliding groove of 402 slides to limit the horizontal position of the sine mechanism and prevent it from swaying; there are four sets of horizontal pulleys 40305, symmetrically installed in the round holes on both sides of the sine drive plate 40303, and axially positioned by cylindrical pins. During operation, the horizontal pulleys 40305 slide in the lower vertical sliding groove of the sine guide rail 40402 to limit the vertical position of the sine mechanism 403 and prevent it from jumping; the sine mechanism 403 is supported by crank 505. The device can slide within the sinusoidal guide rail 40402; the stop platform 404 includes a stop 40401 and a sinusoidal guide rail 40402; the two sinusoidal guide rails 40402 are parallel and fixedly connected to the right platform 103; the stop 40401 is fixed on the two sinusoidal guide rails 40402, with a protruding stop block in the middle; the monitoring and adjustment device 405 is installed on the thread of the guide rod 40102, and includes an energy storage spring 40501, a pressure sensor 40502, and an adjusting nut 40503; the energy storage spring... 40501 is sleeved on the guide rod 40102, with its front end contacting the bottom end face of the lubricating copper sleeve 40203 and its rear end contacting the top surface of the pressure sensor 40502. The adjusting nut 40503 is installed on the guide rod 40102 and is located at the bottom of the pressure sensor 40502. When the nut is rotated, the pressure sensor 40502 can move back and forth on the threaded section of the guide rod 40102, thereby changing the preload of the energy storage spring 40501, realizing the adjustment of the impact force, and is detected by the pressure sensor 4050.During operation, crank 505 slides within the groove of sine push rod 40302, thereby driving sine mechanism 403 to move forward within sine slide rail 40402. The hanging iron 40301 on sine mechanism 403 engages with the return slider 40204 on punch slide 402 by pressing down on it, subsequently driving punch slide 402 to move backward. During this movement, punch slide 402 compresses energy storage spring 40501 to store energy. When the predetermined stroke is reached, return slider 40204 on punch slide 402 collides with the stop block in the middle of stop bracket 40401, causing return slider 40204 to... The block 40401 is pressed down and moved down, causing the hanging iron 40301 to disengage from the return slider 40204, thus separating the punch slide 402 from the sine mechanism 403. At this time, the punch slide 402 is released under the action of the energy storage spring 40501 to perform the impact action. During the impact, the punch slide 402 separates from the sine mechanism 403, which can greatly reduce the vibration transmitted to the main shaft 504 during the impact, making the mechanism run more stably and extending the life of the motor 501. Finally, the sine mechanism 403 moves forward, and the hanging iron 40301 is engaged with the return slider 40204 again to reset, completing a complete impact action cycle.

[0046] Combination Figure 20 The drive module 5 includes a motor 501, a reducer 502, a coupling 503, a main shaft 504, a crank 505, a bearing housing 506, and a dynamic balancing device 507. The motor 501 is located on the left side of the right base 105. The reducer 502 is fixedly connected to the motor 501, and the output shaft of the reducer 502 is connected to the main shaft 504 through the coupling 503. The dynamic balancing device 507 is located in the middle of the main shaft 504, and its protruding direction is opposite to that of the crank 505. It can prevent the machine body from vibrating due to dynamic imbalance generated when the main shaft 504 rotates. The crank 505 is located at the upper end of the main shaft 504. The bearing housing 506 is installed in the circular hole of the right base 103. The bearing housing 506 contains a pair of bearings, which support the rotation of the main shaft 504. The drive module 5 provides power to the separate sinusoidal loading module 4. The motor 501 is the power source. After the output torque is amplified by the reducer 502, it is transmitted to the main shaft 504 by the coupling 503, thereby driving the movement of the separate sinusoidal loading module 4.

[0047] Combination Figures 21 to 24The part fixture module 6 includes a part fixing device 601 and an impact energy buffer 602. The part fixing device 601 includes a chuck bracket 60101 and a self-centering four-jaw chuck 60102. The chuck bracket 60101 is installed in the T-slot of the left platform 304, and the self-centering four-jaw chuck 60102 is fixedly connected to the chuck bracket 60101. When conducting an impact fatigue test on the part, the special part fixture is placed at the center of the self-centering four-jaw chuck 60102, then the chuck is locked, and the lifting module 3 is adjusted to the required height to conduct the test. The impact energy buffer 602 is arranged on the right side of the part fixing device 601, and includes a buffer outer frame 60201, a buffer bracket 60202, a buffer front cover 60203, a buffer head 60204, and a buffer spring 60205. The buffer bracket 60202 is fixed in the T-slot of the left platform 304, and the buffer outer frame 60201 is fixed to the buffer bracket 60202. The buffer head 60204 and the buffer spring 60205 are installed inside the buffer outer frame 60201, and the buffer front cover 60203 passes through the buffer head 60204 and is fixed to the buffer outer frame 60201. During operation, the punch 40201 impacts the buffer head 60204. After energy buffering, the buffer head 60204 then impacts the part. Different sizes and specifications of the buffer spring 60205 can be replaced according to the required energy level, and the front and rear positions of the impact energy buffer 602 can be adjusted to regulate the impact force on the part.

[0048] Combination Figure 25 The outer protective frame 7 is fixed to the ground separately to prevent impact vibrations generated during operation from being transmitted along the fuselage to the outer protective frame 7. It includes an outer protective frame 701, a sliding door 702, a pneumatic control panel 703, and a sensor control panel 704. The outer protective frame 701 is fixed to the ground by four feet arranged on the inner side. The sliding door 702 is installed on a guide rail inside the outer protective frame 701 and has a window that allows observation of the test from the outside during the test. The pneumatic control panel 703 is arranged on the left side of the front of the outer protective frame 701 and is used to control and operate the clamp 20103, self-centering cylinder 20201, vertical cylinder 20302, and self-centering vise 20304 in the gun clamp module 2. The sensor control panel 704 is arranged on the right side of the front of the outer protective frame 701 and displays and operates the monitoring data in real time during the operation of the monitoring and adjustment device 405.

[0049] This invention employs a separate sinusoidal loading module, with the sinusoidal mechanism and the punch slide designed separately. When it moves to the predetermined position, the connecting iron between the two mechanisms is released through the stop, achieving mechanism separation. The punch slide completes the impact action independently, significantly reducing vibration transmitted to the main shaft and motor, and improving the lifespan of the fatigue testing machine. The loading module of the impact fatigue testing machine with adjustable impact momentum uses a sinusoidal mechanism, which greatly reduces collisions during transmission, making operation smooth and reliable, and realizing the function of multiple repeated impacts, with a maximum frequency of up to 1200 times per minute. Two energy storage springs are used for energy storage, and the impact momentum can be adjusted by adjusting the double nuts at the rear end of the springs, with a maximum impact force of up to 250,000 N.

Claims

1. An impact fatigue testing machine with adjustable collision momentum, characterized in that, include: The fuselage has high and low positions; the low position is used to install lifting modules, gun clamping modules, or parts clamping modules. The high position is used to install the driver module and the separate sine load module; Firearm clamping module or parts clamping module, used to clamp firearms or firearm parts; The lifting module is used to drive the lifting action of the firearm fixture module or the parts fixture module, so as to adjust the height of the firearm or firearm parts under test, and adjust the height of the firearm or firearm parts under test to be level with the center line of the punch. The separate sinusoidal loading module includes: a sinusoidal support, serving as a guide mechanism for the punch slide and a mounting mechanism for the monitoring and adjustment device; a monitoring and adjustment device, used to store the elastic potential energy of the punch slide and to adjust the impact force by adjusting the elastic potential energy; a stop platform, serving as a guide mechanism for the sinusoidal mechanism's movement, limiting the horizontal and vertical positions of the sinusoidal mechanism, and enabling the punch slide to separate from the sinusoidal mechanism when it moves backward with the sinusoidal mechanism to a predetermined stroke; a punch slide, serving as the action mechanism for impact fatigue testing, capable of engaging with the sinusoidal mechanism when it moves forward; and a sinusoidal mechanism, in cooperation with the drive module, capable of reciprocating linearly along the stop platform under the drive of the drive module. The drive module is used to convert its own rotational motion into linear reciprocating motion of a sinusoidal mechanism; The punch slide plate includes a punch, a punch drive plate, a lubricating copper sleeve, a return slider, and a return spring; the punch is fixedly connected to the punch drive plate, the lubricating copper sleeve is disposed in the sleeves on both sides of the punch drive plate and slides in cooperation with the sine support; the return slider can achieve elastic lifting and lowering movement relative to the punch drive plate through the return spring. The sinusoidal mechanism includes a hanging iron, a sinusoidal push rod, a sinusoidal drive plate, a vertical pulley, and a horizontal pulley; the sinusoidal push rod and the hanging iron are fixedly connected to the sinusoidal drive plate; the vertical pulley and the horizontal pulley cooperate with the sliding groove of the stop platform to limit the horizontal and vertical positions of the sinusoidal mechanism; the sinusoidal drive plate is used to install the hanging iron, the sinusoidal push rod, the vertical pulley, and the horizontal pulley; the lower end of the tail of the sinusoidal push rod is provided with an elliptical sliding groove, which cooperates with the drive module to realize linear reciprocating motion; The upper end of the reciprocating slider is provided with an inclined surface for cooperating with the hanging iron. When the hanging iron moves forward, it can press down on the reciprocating slider through the inclined surface and engage with the reciprocating slider. When the reciprocating slider moves backward to reach the predetermined stroke, it can be pressed down by the stop platform to separate from the hanging iron. The drive module includes a motor, a reducer, a coupling, a main shaft, a crank, a bearing housing, and a dynamic balancing device; the motor is connected to the main shaft through the reducer; the dynamic balancing device is located in the middle of the main shaft, with its protrusion direction opposite to that of the crank; the crank is located at the upper end of the main shaft and is used to drive the sinusoidal mechanism to move; the main shaft is supported on the machine body through the bearing housing.

2. The impact fatigue testing machine with adjustable collision momentum according to claim 1, characterized in that, The sinusoidal support includes a front support, a guide rod, and a rear support; There are two guide rods, which are fixedly connected in parallel between the front support and the rear support; and the guide rods are provided with external threads for installing monitoring and adjustment devices.

3. The impact fatigue testing machine with adjustable collision momentum according to claim 2, characterized in that, The monitoring and adjustment device includes an energy storage spring, a pressure sensor, and an adjusting nut. The energy storage spring is sleeved on the guide rod, with its front end in contact with the punch slide plate and its rear end in contact with the top surface of the pressure sensor. The adjusting nut is installed on the guide rod and located at the bottom of the pressure sensor. When the adjusting nut is rotated, the pressure sensor moves back and forth in the threaded section of the guide rod, thereby changing the preload of the energy storage spring and adjusting the impact force.

4. The impact fatigue testing machine with adjustable collision momentum according to claim 2, characterized in that, The baffle platform includes a baffle and sinusoidal guide rails; the two sinusoidal guide rails are fixedly connected to the machine body in parallel; the baffle is fixed on the two sinusoidal guide rails, and there is a protruding block in the middle position, which is used to press down the reciprocating slider to separate it from the hanging iron when the reciprocating slider moves backward.

5. The impact fatigue testing machine with adjustable collision momentum according to claim 1, characterized in that, The firearm clamp module includes: A frame fixing device is used to clamp the sides and top of the frame; Gun body fixing device, used to clamp the gun body on both sides; The buttstock fixing device is used to clamp the rear of the gun.

6. The impact fatigue testing machine with adjustable collision momentum according to claim 5, characterized in that, The clamp is fixed to the clamp slider and is mounted together on the clamp guide rail. The clamp guide rod is fixed to the clamp slider, and the clamp guide rail is fixed to the clamp base. During operation, the clamp is first opened and placed in a relaxed state. Then, the clamp guide rod is pushed forward to make it fit tightly against the rear end face of the gun. Finally, the clamp is locked to complete the clamping of the firearm.

7. The impact fatigue testing machine with adjustable collision momentum according to claim 1, characterized in that, The lifting module includes a lifting platform, a guide column, a hand crank, a mounting platform, and a connecting device. There are four lifting platforms in total, which are set between the mounting platform and the machine body. The lifting platforms are connected to each other through couplings and connecting devices. The two lifting platforms on the front side are connected to each other through a connecting device and a coupling, while the two lifting platforms on the back side are connected to the two lifting platforms on the front side only through couplings. A hand crank is installed at the end of the input shaft of the connecting device.

8. The impact fatigue testing machine with adjustable collision momentum according to claim 1, characterized in that, The parts clamping module includes a parts fixing device and an impact energy buffer; the parts fixing device includes a chuck bracket and a self-centering four-jaw chuck; the chuck bracket is mounted on the machine body, and the self-centering four-jaw chuck is fixed to the chuck bracket; the impact energy buffer is arranged on the side of the parts fixing device and includes a buffer outer frame, a buffer bracket, a buffer front cover, a buffer head, and a buffer spring; the buffer bracket is fixed to the machine body, the buffer outer frame is fixed to the buffer bracket, the buffer head and the buffer spring are installed inside the buffer outer frame, and the buffer front cover passes through the buffer head and is fixed to the buffer outer frame.

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