Bullet recovery push rod device for Hopkinson bar experiment

Abstract

The invention provides a bullet recovery push rod device for a Hopkinson bar experiment, and relates to the technical field of Hopkinson push rod devices, the bullet recovery push rod device comprises a fixed table, the fixed table is fixedly installed on the ground through supporting legs arranged at four corners of the bottom, and a percussion box is fixed; the fixed percussion box is fixedly installed above the fixed table through a suspension column arranged at the upper end of the fixed percussion box, the fixed sleeve is fixedly installed on the side, away from the lifting percussion groove, of the fixed percussion box, and the percussion channel extends into the fixed sleeve; the incident rod is arranged on the side, away from the fixed percussion box, of the fixed sleeve, the bullet recovery device can automatically retreat from the fixed percussion box after bullets collide and fall into the bullet recovery sliding groove box, an experimenter can easily conduct bullet damage evaluation after each collision experiment is completed, the bullet recovery efficiency is improved, and the bullet recovery efficiency is improved. And bullets are filled again through the push rod mechanism after the evaluation is confirmed to be correct, so that the accuracy of an experimental result is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of Hopkins push rod devices, in particular to a bullet recovery push rod device used for a Hopkinson bar experiment. Background Art

[0002] A Hopkinson pressure rod launching and bullet recovery system with a publication number of "CN206523379U" in the prior art comprises a test bench and an air chamber, wherein the test bench is provided with a base, on which a launch tube, a launch cavity, a three-way connection, a manual ball valve, a pneumatic ball valve, a pressure regulating valve, an air chamber, a bullet inside the launch tube, an incident rod, a transmission rod, and a buffer device for the limit transmission rod are sequentially arranged, a bullet is arranged in the launch cavity, a three-way joint is arranged on the high-pressure ventilation pipeline, and another joint of the three-way joint is connected to a vacuum pump through an exhaust pipe, and compressed air pressurizes the launch cavity through the air chamber so as to push the bullet into the launch tube to achieve the effect of bullet launching, and when the bullet needs to be recovered, negative pressure is applied to the launch tube through the vacuum pump gas and the three-way joint to achieve the recovery of the bullet, wherein the manual valve is normally open in the test, and the pneumatic ball valve is only opened during launching, and in addition, the pneumatic valve can be used to avoid electromagnetic waves emitting when the solenoid valve is opened to interfere with data collection.

[0003] However, the above-mentioned device still has obvious defects during use: the above-mentioned device adopts pneumatic method to recover and load bullets. Although the operation is simple, the entire recovery process is carried out in the shooting tube. Since the bullet needs to collide repeatedly during the experiment, internal or surface damage may occur during the collision, thereby affecting the accuracy of the experimental results. Therefore, it is necessary to evaluate the damage of the bullet after the collision. Therefore, the above-mentioned loading method will not be conducive to the damage assessment of the bullet, which may affect the experimental results due to the damage of the bullet. Summary of the invention

[0004] The object of the present invention is to provide a bullet recovery push rod device for Hopkinson bar experiment to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A bullet recovery push rod device for a Hopkinson bar experiment, comprising: A fixed platform, the fixed platform is fixedly installed on the ground through legs arranged at the four corners of the bottom, a bullet recovery chute box is fixedly installed on the upper surface of the fixed platform, a push rod hole is opened in the bullet recovery chute box, a loading push rod is telescopically installed in the push rod hole, and the loading push rod is fixedly connected to the telescopic arm of the hydraulic telescopic cylinder; Fixed firing box, the fixed firing box is fixedly installed above the fixed table through a suspension column arranged at the upper end, a firing channel is opened in the fixed firing box, and a lifting firing groove and a lifting deflection groove communicated with the firing channel are also opened in the fixed firing box. A lifting firing box is arranged in the lifting firing groove in a lifting manner, and a deflection block is arranged in the lifting deflection groove in a lifting manner. A loading groove for embedding bullets is opened in the lifting firing box. The lifting firing box forms two working modes of loading state and firing state through lifting displacement. Transition channels and bullet recovery channels are respectively opened at the upper and lower positions of the deflection block. The lifting movement of the deflection block enables the transition channel or the bullet recovery channel to cooperate with the firing channel; wherein, In the loading state, the lifting firing box descends to the bottom limit position. At this time, the bullet falling into the bullet recovery chute box is pushed into the loading groove by the loading push rod; In the firing state, the lifting firing box rises to the top limit position. At this time, the axis of the loading groove coincides with the axis of the firing channel. The pneumatic pumping device installed in the lifting firing box pumps air into the loading groove to push the bullet to impact outward through the firing channel; When the transition channel cooperates with the firing channel, the fired bullet can pass through the transition channel and shoot outwards; When the bullet recovery channel cooperates with the firing channel, the bullet shot outwards can return to the firing channel after collision and fall into the bullet recovery chute box from the bullet recovery channel; Further included, Fixed sleeve, the fixed sleeve is fixedly installed on one side of the fixed firing box away from the lifting firing groove, and the firing channel extends into the fixed sleeve; Incident rod, the incident rod is arranged on one side of the fixed sleeve away from the fixed firing box. The bullet passes through the fixed sleeve and collides with the incident rod to transfer kinetic energy. A transmission rod is also arranged on one side of the incident rod away from the fixed sleeve. The gap between the incident rod and the transmission rod is used to place the collision specimen.

[0006] Preferably, a through hole for the lifting firing box to lift is opened on the fixed table. Worm gear reduction motors are fixedly installed on both sides of the fixed table on both sides of the through hole. A lifting drive gear is fixedly installed on the drive shaft of the worm gear reduction motor. The lifting drive gear meshes with the tooth grooves opened on both sides of the lifting firing box.

[0007] Preferably, a spring seat is fixedly installed on one side of the deflection block close to the lifting firing groove. A traction spring is fixedly installed on the spring seat. One end of the traction spring away from the spring seat is connected to the fixed firing box. The traction spring pulls the deflection block upward under the action of no external force to keep the bullet recovery channel cooperating with the firing channel.

[0008] Preferably, a limiting frame is fixedly installed on the fixed firing boxes located on both sides of the deflecting block. The limiting frame is rotatably installed with a abutting limiting claw through a rotating shaft hole provided. The two abutting limiting claws cooperate with a limiting groove provided on the deflecting block. When the deflecting block moves downward against the elastic force of the traction spring, the two abutting limiting claws provided cooperate with the limiting groove. At this time, the transition channel of the deflecting block cooperates with the firing channel of the fixed firing box.

[0009] Preferably, an operating push rod is fixedly installed on the side of the two abutting limiting claws away from the deflecting block. When a bullet is shot into the fixed sleeve, the operating push rod pushes the two abutting limiting claws to release the cooperation with the limiting groove. At this time, the deflecting block rises under the traction of the traction spring, so that the bullet recovery channel cooperates with the firing channel, thereby guiding the bullet rebounding into the firing channel to fall into the bullet recovery chute box through the bullet recovery channel.

[0010] Preferably, a plurality of annularly arranged cylinder holes are provided in the fixed sleeve. A driving cylinder is fixedly installed in the cylinder hole. An air-operated disc is also fixedly installed on the fixed sleeve outside the driving cylinder. The air-operated disc is communicated with the operating cylinder through a hollow pipe. The piston end of the operating push rod is movably inserted into the operating cylinder. An active piston rod is telescopically arranged in each driving cylinder. A pushing ball is fixedly connected to one end of the active piston rod close to the firing channel. An extrusion spring is arranged at the other end of the active piston rod away from the pushing ball. The extrusion spring is used to push the pushing ball toward the side close to the axis of the firing channel under the action of no external force. When a bullet is fired into the fixed sleeve, the bullet pushes a plurality of pushing balls to do work against the elastic force of the extrusion spring. At this time, the gas in the driving cylinder enters the operating cylinder through the air-operated disc and the hollow pipe, thereby pushing the operating push rod to extend outward and releasing the limit of the deflecting block by the abutting limiting claw.

[0011] Preferably, a buffer block is telescopically installed on the side of the fixed sleeve away from the fixed firing box. The buffer block is movably inserted into a slide bar frame through slide bars provided on both sides. The slide bar frame is fixedly installed on the fixed firing box. A buffer spring is fixedly installed between the slide bar frame and the buffer block. An assembly inserting rod block is fixedly installed between the buffer blocks. The assembly inserting rod block extends into the fixed sleeve. A translation inserting rod provided at the front end of the assembly inserting rod block is inserted into an inserting rod hole provided in the fixed sleeve. Firing channels are provided between the buffer block and the assembly inserting rod block. After the incident rod rebounds, it abuts against the buffer block. The buffer block is provided to prevent the incident rod from directly colliding with the fixed sleeve after rebounding.

[0012] Compared with the prior art, the beneficial effects of the present invention are: The bullet recovery device provided by the present invention can automatically exit the fixed firing box after the bullet collides and fall into the bullet recovery chute box. After each collision experiment is completed, the experimenter can easily evaluate the damage of the bullet. After the evaluation is confirmed to be correct, the bullet is loaded again through the push rod mechanism, thus ensuring the accuracy of the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is an exploded schematic view of the overall structure of the present invention; Figure 2 is a three-dimensional schematic view of the installation and connection structure of the driving cylinder of the present invention; Figure 3 is a three-dimensional schematic view of the installation structure of the abutting limit claw of the present invention; Figure 4 is a schematic view of the lifting firing box in the firing state of the present invention; Figure 5 is a schematic view of the cooperation state of the bullet recovery channel and the firing channel of the direction-changing block of the present invention; Figure 6 is a three-dimensional schematic view of the overall structure of the present invention; Figure 7 is a schematic view of the lifting firing box in the bullet loading state of the present invention.

[0014] In the figure: 1 fixed table, 2 bullet recovery chute box, 3 loading push rod, 4 fixed firing box, 5 firing channel, 6 lifting firing groove, 7 lifting direction-changing groove, 8 lifting firing box, 9 direction-changing block, 10 loading groove, 11 transition channel, 12 bullet recovery channel, 13 fixed sleeve, 14 incident rod, 15 through hole, 16 worm gear reduction motor, 17 tooth groove, 18 traction spring, 19 limit frame, 20 abutting limit claw, 21 limit groove, 22 operating push rod, 23 driving cylinder, 24 pneumatic disc, 25 hollow pipe, 26 operating cylinder, 27 active piston rod, 28 pushing ball, 29 extrusion spring, 30 buffer block, 31 sliding rod, 32 sliding rod frame, 33 buffer spring, 34 assembly plug block, 35 plug hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0016] Please refer to Figure 1-7 , the present invention provides a technical solution: Embodiment 1: A bullet recovery push rod device for Hopkinson bar experiment, comprising: A fixed table 1, the fixed table 1 is fixedly installed on the ground through legs arranged at the four corners of the bottom, a bullet recovery chute box 2 is fixedly installed on the upper surface of the fixed table 1, a push rod hole is opened in the bullet recovery chute box 2, and a loading push rod 3 is telescopically installed in the push rod hole. The loading push rod 3 is fixedly connected to the telescopic arm of a hydraulic telescopic cylinder; A fixed firing box 4, the fixed firing box 4 is fixedly installed above the fixed table 1 through a suspension column arranged at the upper end. A firing channel 5 is opened in the fixed firing box 4, and a lifting firing groove 6 and a lifting deflection groove 7 communicated with the firing channel 5 are also opened in the fixed firing box 4. A lifting firing box 8 is arranged in a lifting manner in the lifting firing groove 6, and a deflection block 9 is arranged in a lifting manner in the lifting deflection groove 7. A loading groove 10 for the bullet to be inserted is opened in the lifting firing box 8. The lifting firing box 8 forms two working modes of a loading state and a firing state through lifting displacement. Transition channels 11 and bullet recovery channels 12 are respectively opened at the upper and lower positions of the deflection block 9. Through the lifting movement of the deflection block 9, the transition channel 11 or the bullet recovery channel 12 is matched with the firing channel 5; wherein, In the loading state, the lifting firing box 8 descends to the bottom limit position. At this time, the bullet falling into the bullet recovery chute box 2 is pushed into the loading groove 10 by the loading push rod 3; In the firing state, the lifting firing box 8 rises to the top limit position. At this time, the axis of the loading groove 10 coincides with the axis of the firing channel 5. The bullet is pushed by pumping air into the loading groove 10 through the air pumping device installed in the lifting firing box 8 and impacts outward through the firing channel 5; When the transition channel 11 is matched with the firing channel 5, the fired bullet can pass through the transition channel 11 and shoot outwards; When the bullet recovery channel 12 is matched with the firing channel 5, the bullet shot outwards can return to the firing channel 5 after collision and fall into the bullet recovery chute box 2 from the bullet recovery channel 12; It also includes, A fixed sleeve 13, the fixed sleeve 13 is fixedly installed on the side of the fixed firing box 4 away from the lifting firing groove 6, and the firing channel 5 extends into the fixed sleeve 13; An incident bar 14, the incident bar 14 is arranged on the side of the fixed sleeve 13 away from the fixed firing box 4. The bullet is shot out through the fixed sleeve 13 and collides with the incident bar 14, so as to conduct kinetic energy transfer. A transmission bar is also arranged on the side of the incident bar 14 away from the fixed sleeve 13. The gap between the incident bar and the transmission bar is used for placing the collision specimen.

[0017] In this embodiment, both the fixed platform 1 and the fixed firing box 4 are fixedly arranged. A bullet recovery chute box 2 is fixedly installed on the fixed platform 1 to carry the retracted bullets, so that after the collision, the bullets are exposed in the field of vision of the experimenter and can be picked up for evaluating the damage state of the bullets. After it is evaluated and confirmed that the bullets are undamaged, they are loaded and used again. Compared with the existing loading methods, this loading method facilitates the experimenter to check the state of the bullets. A lifting firing groove 6 and a lifting deflection groove 7 are formed at the bottom of the fixed firing box 4. A lifting firing box 8 and a deflection block 9 are arranged corresponding to the lifting in the lifting firing groove 6 and the lifting deflection groove 7 respectively. A through hole 15 for the lifting of the lifting firing box 8 is formed on the fixed platform 1. Worm reduction motors 16 are fixedly installed on both sides of the fixed platform 1 on both sides of the through hole 15. A lifting drive gear is fixedly installed on the drive shaft of the worm reduction motor 16. The lifting drive gear meshes with the tooth grooves 17 formed on both sides of the lifting firing box 8. The bullets are loaded through the loading groove 10 formed in the lifting firing box 8 and fired through the firing channel 5 formed in the fixed firing box 4. The deflection block 9 changes the moving direction of the bullets by lifting. When the transition channel 11 cooperates with the firing channel 5, the bullets are fired out of the fixed firing box 4 at this time. When the bullet recovery channel 12 cooperates with the firing channel 5, the rebounded bullets can fall into the bullet recovery chute box 2 through the bullet recovery channel 12. Since most of the existing bullets are in a cylindrical shape, the provided bullet recovery channel 12 should be able to allow the bullets to pass through smoothly. A fixed sleeve 13 is also installed in the direction of the bullet exit of the fixed firing box 4. As an extension of the fixed firing box 4, the firing channel 5 provided therein can further ensure the stability of the bullet exit.

[0018] Embodiment Two: A spring seat is fixedly installed on one side of the deflection block 9 close to the lifting firing groove 6. A traction spring 18 is fixedly installed on the spring seat. The end of the traction spring 18 away from the spring seat is connected to the fixed firing box 4. The traction spring 18 pulls the deflection block 9 to move upward under the action of no external force so that the bullet recovery channel 12 and the firing channel 5 remain in cooperation.

[0019] Limit frames 19 are also fixedly installed on the fixed firing box 4 on both sides of the deflection block 9. The limit frames 19 are rotatably installed with abutting limit claws 20 through the formed shaft holes. The two-sided abutting limit claws 20 cooperate with the limit grooves 21 formed on the deflection block 9. When the deflection block 9 moves downward against the elastic force of the traction spring 18, the two-sided provided abutting limit claws 20 cooperate with the limit grooves 21. At this time, the transition channel 11 of the deflection block 9 cooperates with the firing channel 5 of the fixed firing box 4.

[0020] On the side of the abutting limit claws 20 on both sides away from the direction-changing block 9, an operating push rod 22 is fixedly installed. When a bullet enters the fixed sleeve 13, the operating push rod 22 pushes the abutting limit claws 20 on both sides to release the cooperation with the limit groove 21. At this time, the direction-changing block 9 rises under the traction of the traction spring 18, so that the bullet recovery channel 12 cooperates with the firing channel 5, thereby guiding the bullet that rebounds into the firing channel 5 to fall into the bullet recovery chute box 2 through the bullet recovery channel 12.

[0021] In this embodiment, a connection mechanism of the direction-changing block 9 is further disclosed. Through the arrangement of the traction spring 18, the direction-changing block 9 always has a tendency to rebound and reset. The reset of the traction spring 18 is blocked through the arrangement of the abutting limit claws 20, and the abutting limit claws 20 are pushed by the operating push rod 22, so as to release the limit on the direction-changing block 9. Therefore, by pushing the operating push rod 22, the transition channel 11 or the bullet recovery channel 12 can be made to cooperate with the firing channel 5. The operating push rod 22 can be driven by the operation of an electrical device. For example, after the optoelectronic mechanism detects that a bullet enters the fixed sleeve 13, the electrical device operates to push the operating push rod 22 to move. This solution needs to be used in combination with a bullet position recognition device and an electrical device that pushes the operating push rod 22 to move.

[0022] Embodiment Three: A plurality of annularly arranged cylinder holes are formed in the fixed sleeve 13. A driving cylinder 23 is fixedly installed in the cylinder holes. An air-operated disc 24 is also fixedly installed on the fixed sleeve 13 outside the driving cylinder 23. The air-operated disc 24 is communicated with an operating cylinder 26 through a hollow pipe 25. The piston end of the operating push rod 22 is movably inserted into the operating cylinder 26. A driving piston rod 27 is telescopically arranged in each driving cylinder 23. A pushing ball 28 is fixedly connected to one end of the driving piston rod 27 close to the firing channel 5. A compression spring 29 is arranged at the other end of the driving piston rod 27 away from the pushing ball 28. The compression spring 29 is used to push the pushing ball 28 toward the side close to the axis of the firing channel 5 when there is no external force. When a bullet is fired and enters the fixed sleeve 13, the bullet pushes a plurality of pushing balls 28 to do work against the elastic force of the compression spring 29. At this time, the gas in the driving cylinder 23 enters the operating cylinder 26 through the air-operated disc 24 and the hollow pipe 25, thereby pushing the operating push rod 22 to extend outward and releasing the limit of the abutting limit claws 20 on the direction-changing block 9.

[0023] In this embodiment, a plurality of driving cylinders 23 are further arranged in the fixed sleeve 13. When the bullet enters the fixed sleeve 13 and pushes the pushing ball 28 to move away from the axis position of the firing channel 5, the active piston rod 27 is pushed. At this time, the gas in the driving cylinder 23 finally enters the operating cylinder 26, so as to push the operating push rod 22 to extend outwards and release the limit of the variable direction block 9 by the abutting limit claw 20. The setting of this scheme no longer requires the participation of the electrical components and sensor components in the second embodiment, so as to utilize the kinetic energy generated by the ejection of the bullet to release the limit of the variable direction block 9 by the abutting limit claw 20.

[0024] Embodiment 4: A buffer block 30 is telescopically installed on the side of the fixed sleeve 13 away from the fixed firing box 4. The buffer block 30 is movably inserted on the slide rod frame 32 through the slide rods 31 arranged on both sides. The slide rod frame 32 is fixedly installed on the fixed firing box 4. A buffer spring 33 is fixedly installed between the slide rod frame 32 and the buffer block 30. An assembly insertion rod block 34 is fixedly installed between the buffer blocks 30. The assembly insertion rod block 34 extends into the fixed sleeve 13. The translation insertion rod provided at the front end of the assembly insertion rod block 34 is inserted into the insertion rod hole 35 opened in the fixed sleeve 13. Firing channels 5 are provided between the buffer block 30 and the assembly insertion rod block 34. After the incident rod 14 rebounds, it abuts against the buffer block. The buffer block 30 is provided to prevent the incident rod 14 from directly colliding with the fixed sleeve 13 after rebounding.

[0025] In this embodiment, since the incident rod 14 will generate a rebound displacement after hitting the specimen, the buffer block 30 can prevent the incident rod 14 from directly hitting the fixed firing box 4 and the fixed sleeve 13, so as to protect the device.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bullet recovery push rod device for Hopkinson bar experiment, characterized in that: include: A fixed platform, the fixed platform is fixedly installed on the ground through legs arranged at the four corners of the bottom, a bullet recovery chute box is fixedly installed on the upper surface of the fixed platform, a push rod hole is opened in the bullet recovery chute box, a loading push rod is telescopically installed in the push rod hole, and the loading push rod is fixedly connected to the telescopic arm of the hydraulic telescopic cylinder; A fixed firing box, which is fixedly installed above a fixed platform by a suspension column arranged at the upper end, a firing channel is provided in the fixed firing box, a lifting firing slot and a lifting changing slot connected to the firing channel are also provided in the fixed firing box, a lifting firing box is lifted in the lifting firing slot, a changing block is lifted in the lifting changing slot, a loading slot for bullets to be embedded is provided in the lifting firing box, the lifting firing box forms two working modes of loading state and firing state through lifting displacement, a transition channel and a bullet recovery channel are respectively provided at the upper and lower positions of the changing block, and the transition channel or the bullet recovery channel is coordinated with the firing channel through the lifting and lowering movement of the changing block; wherein, In the loading state, the lifting firing box is lowered to the bottom limit position, at which time the bullet falling into the bullet recovery chute box is pushed into the loading slot by the loading push rod; In the firing state, the lifting firing box rises to the top limit position, at which time the axis of the loading slot coincides with the axis of the firing channel, and the air pumping device installed in the lifting firing box pumps air into the loading slot to push the bullet through the firing channel to impact outward; When the transition channel cooperates with the firing channel, the fired bullet can pass through the transition channel and be fired outward; When the bullet recovery channel cooperates with the firing channel, the bullet shot outward can return to the firing channel after collision and fall from the bullet recovery channel into the bullet recovery chute box; further comprising, A fixed sleeve, the fixed sleeve is fixedly mounted on a side of the fixed firing box away from the lifting firing slot, and the firing channel extends into the fixed sleeve; An incident rod is arranged on the side of the fixed sleeve away from the fixed firing box. The bullet is ejected through the fixed sleeve and collides with the incident rod, thereby transferring kinetic energy. A transmission rod is also arranged on the side of the incident rod away from the fixed sleeve. The gap between the incident rod and the transmission rod is used for placing the collision sample.

2. A bullet recovery push rod device for Hopkinson bar experiment according to claim 1, characterized in that: The fixed platform is provided with a through hole for lifting the lifting firing box, and worm reduction motors are fixedly installed on the fixed platforms on both sides of the through hole. A lifting driving gear is fixedly installed on the driving shaft of the worm reduction motor, and the lifting driving gear is meshed with the tooth grooves provided on both sides of the lifting firing box.

3. The bullet recovery push rod device for Hopkinson bar experiment according to claim 1, characterized in that: A spring seat is fixedly installed on the side of the deflection block close to the lifting firing slot, and a traction spring is fixedly installed on the spring seat. The traction spring is connected to the fixed firing box at one end away from the spring seat. The traction spring pulls the deflection block upward without external force so that the bullet recovery channel and the firing channel remain in coordination.

4. The bullet recovery push rod device for Hopkinson bar experiment according to claim 1, characterized in that: A limit frame is also fixedly installed on the fixed firing box located on both sides of the deflection block. The limit frame is rotatably installed with abutment limit claws through the opened rotating shaft hole. The abutment limit claws on both sides cooperate with the limit grooves opened on the deflection block. When the deflection block overcomes the elastic force of the traction spring and moves downward, the abutment limit claws arranged on both sides cooperate with the limit grooves. At this time, the transition channel of the deflection block cooperates with the firing channel of the fixed firing box.

5. The bullet recovery push rod device for Hopkinson bar experiment according to claim 4, characterized in that: The abutment and limiting claws on both sides are also fixedly installed with an operating push rod on the side away from the deflection block. When the bullet is shot into the fixed sleeve, the operating push rod pushes the abutment and limiting claws on both sides to release the cooperation with the limiting groove. At this time, the deflection block rises under the traction of the traction spring, so that the bullet recovery channel cooperates with the firing channel, thereby guiding the bullet that rebounds into the firing channel to fall into the bullet recovery slide box through the bullet recovery channel.

6. The bullet recovery push rod device for Hopkinson bar experiment according to claim 5, characterized in that: The fixed sleeve is provided with a plurality of cylinder holes arranged in a circular array, a driving cylinder is fixedly installed in the cylinder hole, a pneumatic disk is also fixedly installed on the fixed sleeve outside the driving cylinder, the pneumatic disk is connected with the operating cylinder through a hollow pipe, the piston end of the operating push rod is movably inserted in the operating cylinder, an active piston rod is telescopically arranged in the driving cylinder, a pushing ball is fixedly connected to one end of the active piston rod close to the firing channel, an extrusion spring is arranged at the end of the active piston rod away from the pushing ball, the extrusion spring is used for pushing the pushing ball to the side close to the axis of the firing channel in the absence of external force, when the bullet is fired and enters the fixed sleeve, the bullet pushes the plurality of pushing balls to overcome the elastic force of the extrusion spring to do work, at this time, the gas in the driving cylinder enters the operating cylinder through the pneumatic disk and the hollow pipe, thereby pushing the operating push rod to extend outward and causing the limit claw to release the limit on the change-of-direction block.

7. A bullet recovery push rod device for Hopkinson bar experiment according to claim 1 or 6, characterized in that: A buffer block is also telescopically installed on the side of the fixed sleeve away from the fixed firing box, and the buffer block is movably inserted on the sliding rod frame through sliding rods arranged on both sides, and the sliding rod frame is fixedly installed on the fixed firing box. A buffer spring is also fixedly installed between the sliding rod frame and the buffer block, and an assembly rod block is fixedly installed between the buffer blocks. The assembly rod block extends into the fixed sleeve, and the translation rod arranged at the front end of the assembly rod block is inserted into the rod hole opened in the fixed sleeve. Firing channels are opened between the buffer block and the assembly rod block, and the incident rod rests on the buffer block after rebounding. The setting of the buffer block prevents the incident rod from directly colliding with the fixed sleeve after rebounding.

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