A trigger-extend type anti-rebound impact test bench

Abstract

This invention discloses a trigger-extended anti-rebound impact test bench, comprising an impact generating device mounting bench, an impact load mounting bench, a sample mounting bench, a bench base, and a sensing system. The impact generating device mounting bench controls the movement of the hydraulic cylinder piston rod via an electromagnetic reversing valve, achieving stepless torque adjustment; the symmetrical piston rod and guide post / sleeve maintain movement balance. The protrusions on both sides of the load on the impact load mounting bench collide with and trigger the anti-rebound mechanism's fork, causing the connecting rod to pull out the pin, which in turn causes the spring-driven impact block to extend and block the rebound; the bottom guide rail slider of the load is equipped with phenolic resin blocks to reduce friction. The impact seat of the sample mounting bench has a trapezoidal structure. The bench base is welded to the embedded parts via a foot assembly to disperse the impact force. This invention solves the problems of insufficient impact resistance, lack of anti-rebound, and non-adjustable stroke in existing benches, enabling safe testing under high-energy impacts.

Description

Technical Field

[0001] This invention relates to the technical field of explosion impact simulation testing, and in particular to the technical field of a trigger-extended anti-rebound impact test bench. Background Technology

[0002] Explosion impact simulation testing is a key technology for evaluating the performance and stability of materials, structures, or devices under explosive impact. Traditional methods typically use explosive objects as test sources for on-site experiments, but these methods suffer from drawbacks such as high safety risks, high costs, and difficulty in repeating the tests.

[0003] In existing technologies, the method of simulating explosion waveforms through load impact is gradually becoming mainstream, that is, applying high-energy impact loads for a very short time to simulate the high-pressure gas shock wave generated by an explosion. However, current impact test benches still have the following technical limitations:

[0004] 1. Insufficient impact resistance: The test bench structure is unable to withstand extreme impact loads, especially the reverse impact force generated during acceleration, which lacks an effective buffering and dispersion mechanism;

[0005] 2. Lack of anti-rebound measures: There is a lack of anti-rebound mechanisms suitable for high-speed impact conditions, which cannot prevent the rebound motion after the load collides with the sample;

[0006] 3. Limited stroke adjustment: The load impact stroke is difficult to adjust precisely and over a wide range, which limits the flexibility of the test;

[0007] 4. Impact transmission defects: The platform base lacks an efficient impact force transmission structure, which prevents the impact energy from being effectively distributed to the foundation, affecting the equipment's lifespan and safety.

[0008] The aforementioned technical deficiencies restrict the reliability and applicability of explosion impact simulation tests. There is an urgent need for a safe and stable test bench structure with high impact resistance, effective anti-rebound mechanism, and adjustable stroke in fields such as industrial construction and transportation. Summary of the Invention

[0009] The purpose of this invention is to solve the problems of insufficient impact resistance, lack of anti-rebound measures, limited stroke adjustment and impact transmission defects in the existing technology. It proposes a trigger-extended anti-rebound impact test bench that can withstand high-energy impacts, prevent load rebound, achieve stepless 500mm stroke adjustment, and effectively disperse the impact force to the foundation.

[0010] To achieve the above objectives, this invention proposes a trigger-extended anti-rebound impact test bench, comprising an impact generating device mounting bench, an impact load mounting bench, a sample mounting bench, a bench base, and a sensing system. The impact generating device mounting bench includes a movable bench, a guide post support, and a hydraulic cylinder support. The movable bench is used to install and fix the impact generating device, and the moving distance and direction of the piston rod in the fixed hydraulic cylinder are controlled by an electromagnetic reversing valve to achieve stepless adjustment of the 500mm stroke. The symmetrically arranged piston rod with hinged lifting ring heads, guide sleeve, and guide post are used to hold the bench... The impact load mounting platform includes a load, guide rails, an anti-rebound mechanism, and guide rail supports. The load is equipped with a reflector for laser displacement sensor ranging. The guide rails support and guide the impact load. The linkage device of the anti-rebound mechanism immediately ejects a stop block to prevent the load from rebounding after being triggered by the load collision. The sample mounting platform includes an impact seat, a base, a clamp, a sample, and a laser displacement sensor assembly. The platform base includes a left half base, a right half base, a foot assembly, and a movable guardrail. The sensing system includes a displacement sensor assembly.

[0011] The anti-rebound mechanism of the impact load mounting platform includes a fork, a connecting rod, a pin, a connecting rod seat, a slide, a stop block, a shock-absorbing buffer pad, a spring rod, a spring, a cover plate, a baffle, and a slide groove seat. The anti-rebound mechanism is symmetrical from left to right, with two on each side. During the impact test, when the load passes through the anti-rebound mechanism, the left and right protruding structures collide with the fork, the connecting rod pulls out the pin, and the slide and stop block extend under the action of the spring. When the load collides with the sample and rebounds, the stop block is used to prevent the load from continuing to move along the guide rail to protect the hydraulic impact generating device, and the shock-absorbing buffer pad is used to absorb the rebound impact energy of the load.

[0012] The movable platform of the impact generating device mounting frame includes a front plate, guide sleeve, guide sleeve seat, connecting plate, pressure plate, support, support pin, and hinged lifting ring head piston rod. During the movement of the platform, the two cylinders of the cylinder support are controlled by the hydraulic system of the movable platform to introduce high-pressure oil at one end. The two symmetrical piston rods on the left and right sides push the front plate and guide sleeve to move in the same direction under the action of high pressure of the oil to meet different load impact strokes. The hinged lifting ring head piston rod makes the front plate more flexible to adapt to different force conditions to maintain the symmetry and vertical balance of the movement. The guide sleeve is used to support and guide the movement of the movable platform and reduce the friction and wear of the moving parts. During the impact test, the flange connection between the front plate and the hydraulic impact generating device is subjected to the reverse impact force, which is transmitted to the hinged lifting ring head piston rod and the reverse impact energy is buffered and absorbed by the hydraulic oil in the cylinder piston chamber.

[0013] The test bench base is divided into two parts. The left half of the base is used to fix the impact generator mounting frame and the impact load mounting frame. A rectangular opening is provided in the middle to leave space for manual installation of components such as the hydraulic impact generator. The right half of the base is used to fix the sample mounting frame. The two parts are connected by bolts. The bottom edge of the test bench is provided with 36 foot assemblies. The foot assemblies include a base plate, adjusting pads, and adjusting screws. The base plate is welded to 8 embedded parts. The embedded parts are embedded in the concrete foundation. During the impact test, the huge impact force generated when the load collides with the sample is transmitted from the sample mounting frame to the test bench base, and then from the embedded parts welded to the test bench base to the concrete foundation, so as to disperse the impact force and protect the impact test bench.

[0014] The impact seat of the sample mounting frame includes an upper impact seat and a lower impact seat, both of which are trapezoidal structures. While ensuring good strength, they also provide space for sample deformation and fracture. The clamps include an upper clamp and a lower clamp, which can be replaced according to different sample sizes. The vertical plane of the base can effectively resist frontal impact forces, and the back slope helps to guide the impact force to the frame support structure. The multi-plate steel structure has high strength, which can maintain the stability of the frame when subjected to impact forces and reduce the weight of the frame.

[0015] The front plate is fixed by bolts and flange connection of the hydraulic impact generator, and has rectangular openings for guide rails to pass through on both sides. The I-shaped structure of the front plate can provide high strength, so that the platform can effectively disperse the force and maintain the stability of the overall structure when it is impacted, while reducing weight to facilitate movement, transportation and installation. The connecting plate is used to support the hydraulic impact generator.

[0016] The load includes a load block, a lifting ring, a guide rail slider, and a reflector assembly, and is available in weights of 50kg, 100kg, 200kg, and 400kg. The load block has two protruding structures on each of its left and right sides for triggering the anti-rebound mechanism's fork. The lifting ring is used to lift the load. The bottom of the guide rail slider is fitted with a phenolic resin block to reduce the sliding friction of the load and thus reduce impact energy loss. The reflector assembly is used to reflect the laser from the laser displacement sensor to measure the load's stroke and speed.

[0017] The hydraulic system of the mobile test bench includes a mobile test bench push-pull cylinder, a hydraulically controlled check valve, a check valve, a three-position four-way solenoid directional valve, a pressure reducing valve, a proportional relief valve, a high-pressure pump set, a relief valve, and an oil tank. The three-position four-way solenoid directional valve is in the neutral position when stopped, in the left position when it performs the contraction process, and in the right position when it performs the extension process. The hydraulically controlled check valve is used to prevent the oil in the cylinder cavity from flowing back to the oil tank to buffer and absorb the reaction force during the impact process. The proportional relief valve is used to regulate the system oil pressure. The relief valve is used to limit the maximum system oil pressure. The pressure reducing valve is used to control the working oil pressure of the mobile test bench push-pull cylinder.

[0018] The guide rail is equipped with an impact load displacement detection device, including a magnetic scale column, a locking ring, and a guide bracket. The magnetic scale column is parallel to the impact direction and is attached with a magnetic scale. The locking ring is used to fix the piston rod of the impact generating device. The guide bracket is connected to the guide rail and is used to guide the movement direction of the impact load displacement detection device.

[0019] The front plate is equipped with a guide seat, a reading head, and a reading head bracket directly below it. The guide seat is used to guide and limit the movement direction of the magnetic scale column. The reading head is fixed to the reading head bracket and is parallel to the magnetic scale column. It is used to read the stroke of the magnetic scale. A pull rod type sensor bracket is installed on one side of the front plate to fix the rod end of the pull rod type sensor. The other base end is fixed to the cylinder support on the same side.

[0020] The laser displacement sensor assembly includes a laser displacement sensor, a mounting bracket, a slide, and a cover. The separate design of the laser displacement sensor assembly and the sample mounting frame prevents impact from being transmitted to the laser displacement sensor and causing damage. The cover is used to protect the laser displacement sensor from contact with debris generated by impact. The slide is used to adjust the position of the cover.

[0021] The left and right halves of the base are provided with sliding grooves for pushing and adjusting the position of the movable guardrail. Two movable guardrails are arranged on each side to prevent debris from flying during impact and causing safety hazards.

[0022] The beneficial effects of this invention are:

[0023] 1. Enhanced impact resistance and safety: Through a high-strength impact-resistant structural design (the front plate, impact seat, and base are made of multi-piece steel plates welded into an I-shaped structure), the impact force is effectively dispersed, ensuring the structural stability of the test bench under extreme loads, while reducing manufacturing and maintenance costs.

[0024] 2. Ensure motion balance: A symmetrical guiding and balancing movement system is adopted (the hydraulic cylinders, hinged lifting ring head piston rods, and guide sleeves and guide columns work together to reduce the tilt of the moving platform and the wear of components, thus extending the service life of the equipment).

[0025] 3. Highly efficient in preventing load rebound: By triggering the extension anti-rebound mechanism (the load collision fork triggers the linkage to pull out the pin, and the spring drives the impact block to extend), a block is formed at the moment of load rebound, with short response time and low energy loss.

[0026] 4. Precise monitoring of impact stroke: Utilizing a hybrid load stroke monitoring system (segmented measurement using a rod-type sensor, magnetic scale sensor, and laser displacement sensor), multi-directional data acquisition under high-speed impact is achieved, improving measurement reliability.

[0027] 5. Optimize impact force transmission: Through the buried impact transmission structure (36 anchor components and 8 pre-embedded parts welded and buried in the concrete foundation), the impact force is effectively dispersed to the foundation, reducing equipment vibration and structural stress.

[0028] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0029] Figure 1 This is a perspective view of an impact test bench for a trigger-extended anti-rebound impact test bench according to the present invention.

[0030] Figure 2 This is a perspective view of the impact generating device mounting frame of the trigger-extended anti-rebound impact test bench of the present invention.

[0031] Figure 3 This is a top view of the movable platform of a trigger-extended anti-rebound impact test bench according to the present invention.

[0032] Figure 4 This is a schematic diagram of the hydraulic system of the moving test bench of the trigger-extended anti-rebound impact test bench of the present invention.

[0033] Figure 5 This is a perspective view of the impact load mounting frame of a trigger-extended anti-rebound impact test bench according to the present invention.

[0034] Figure 6 This invention relates to the working principle of the anti-rebound mechanism of a trigger-extended anti-rebound impact test bench. Figure 1 ;

[0035] Figure 7 This invention relates to the working principle of the anti-rebound mechanism of a trigger-extended anti-rebound impact test bench. Figure 2 ;

[0036] Figure 8 This is a perspective view of four loads for a trigger-extended anti-rebound impact test bench according to the present invention;

[0037] Figure 9This is a perspective view of the sample mounting frame of the trigger-extended anti-rebound impact test bench of the present invention;

[0038] Figure 10 This is a perspective view of the base of a trigger-extended anti-rebound impact test bench according to the present invention.

[0039] Figure 11 This is a design drawing of the embedded parts and concrete foundation of a trigger-extended anti-rebound impact test bench according to the present invention.

[0040] In the diagram: 1. Push-pull cylinder; 2. Cylinder support; 3. Hinge lifting ring head piston rod; 4. Front plate; 5. Support; 6. Support pin; 7. Guide sleeve seat; 8. Guide column support; 9. Guide column; 10. Pressure plate; 11. Connecting plate; 12. Sensor bracket; 13. Pull rod type sensor; 14. Reading head bracket; 15. Reading head; 16. Guide seat; 17. Magnetic scale column; 18. Locking ring; 19. Auxiliary bracket; 20. Guide rail; 21. Impact load; 22. Slide seat; 23. Cover plate; 24. Anti-rebound mechanism base; 25. Guide rail support; 26. Slide seat; 27. Shock-absorbing buffer pad; 28. Impact block; 29. ​​Pin; 30. Connecting rod; 31. Pull rod; 32. Connecting rod seat; 33. Shift fork. 34. Reflector plate; 35. Reflector plate bracket; 36. Hanging ring; 37. Guide rail slider; 38. Phenolic resin gasket; 39. Trigger protrusion structure; 40. Base; 41. Sensor bracket; 42. Lower impact seat; 43. Lower clamp; 44. Sample; 45. Cover; 46. Laser displacement sensor; 47. Upper clamp; 48. Slide groove; 49. Upper impact seat; 50. Left half base; 51. Right half base; 52. Moving guardrail; 53. Foot assembly; 54. Proportional overflow valve; 55. Pressure sensor; 56. High-pressure pump set; 57. Overflow valve; 58. Pressure reducing valve; 59. Three-position four-way solenoid directional valve; 60. Check valve; 61. Hydraulic check valve; 62. Magnetic scale sensor; 63. Detailed Implementation

[0041] See Figures 1-11 The present invention includes: an impact generating device mounting frame, an impact load mounting frame, a sample mounting frame, a frame base, and a sensing system;

[0042] The impact generating device mounting frame includes a movable frame, a guide column support, and a cylinder support; the movable frame is provided with a front plate, a guide sleeve, a guide sleeve seat, and a hinged lifting ring head piston rod; the two cylinders of the cylinder support control the movement of the piston rod through an electromagnetic reversing valve to achieve stepless adjustment of the 500mm stroke; the left and right symmetrical hinged lifting ring head piston rod, guide sleeve, and guide column maintain the symmetrical movement and vertical balance of the frame;

[0043] The impact load mounting platform includes a load, a guide rail, an anti-rebound mechanism, and a guide rail support; the load is equipped with a reflector for laser displacement sensor ranging; the guide rail supports and guides the impact load; the linkage device of the anti-rebound mechanism ejects a stop block after being triggered by the load collision;

[0044] The sample mounting frame includes an impact seat, a base, a clamp, a sample, and a laser displacement sensor assembly; the impact seat consists of an upper impact seat and a lower impact seat, both of which are trapezoidal structures; the base is a multi-piece welded steel plate structure.

[0045] The base of the test stand includes a left half base, a right half base, foot components, and a movable guardrail; the left half base has a rectangular opening, and the right half base fixes the sample mounting stand; the base plate of the 36 foot components is welded to 8 embedded parts, which are embedded in the concrete foundation.

[0046] The sensing system includes a displacement sensor assembly.

[0047] The working process of this invention:

[0048] The present invention provides a trigger-extended anti-rebound impact test bench, which is described in conjunction with the accompanying drawings during operation.

[0049] Reference Figure 1 The system includes an impact generator mounting platform, an impact load mounting platform, a specimen mounting platform, and a platform base. The impact generator mounting platform allows for stepless adjustment of its 500mm stroke. The impact load mounting platform is equipped with an anti-rebound mechanism to prevent the load from rebounding after impacting the specimen. A laser displacement sensor assembly for measuring the impact load's stroke and velocity is located on one side of the specimen mounting platform. Movable guardrails on both sides of the platform base prevent splashing during impact. The bottom is welded to embedded parts embedded in a concrete foundation. During the impact test, the impact load accelerates on the guide rail, triggering the anti-rebound mechanism to extend a striking block. The impact load then rebounds upon impact with the specimen and is stopped by the striking block.

[0050] Reference Figure 2 The impact generating device mounting frame includes a movable frame and a fixed support. The movable frame includes a hinged lifting ring head piston rod 3, a front plate 4, a support 5, a support pin 6, a guide sleeve seat 7, a guide sleeve 10, a pressure plate 11, and a connecting plate 12. The hinged lifting ring head piston rod 3 is connected to the front plate 4 through the support 5 and the support pin 6 to eliminate the imbalance caused by uneven force on both sides. The front plate 4 has a round hole in the middle for the piston rod of the impact generating device to pass through, and square holes on the inner sides for the guide rail 21 to pass through. The outer sides are connected to the guide sleeve seat 7. The guide sleeve seat 7 and the guide sleeve 10 can slide on the guide post 9. The connecting plate 12 is used to connect the guide sleeve seats 7 on both sides and support the impact generating device. The push-pull cylinder 1 is fixed to the cylinder support 2, and the guide post 9 is fixed by two guide post supports 8.

[0051] Reference Figure 3The front plate 4 is equipped with a sensor bracket 13, a pull rod sensor 14, a reading head bracket 15, a reading head 16, and a guide seat 17. The pull rod sensor 14 is used to measure the stroke of the moving platform. Its rod end is fixed to the front plate 4 through the sensor bracket 13, and its base end is fixed to the cylinder support 2 through screws. The reading head 16 is used to measure the stroke of the magnetic scale column 18, and the guide seat 17 is used to guide and limit the movement direction of the magnetic scale column 18.

[0052] Reference Figure 4 The working state of the push-pull cylinder 1 of the moving platform is controlled by a hydraulic system, including a proportional relief valve 55, a pressure sensor 56, a high-pressure pump set 57, a relief valve 58, a pressure reducing valve 59, a three-position four-way solenoid directional valve 60, a check valve 61, and a hydraulically controlled check valve 62. The proportional relief valve 55 is used to regulate the system pressure, the high-pressure pump set 57 provides the oil source, the relief valve 58 limits the maximum system pressure, the pressure reducing valve 59 controls the push-pull pressure of the push-pull cylinder 1, the three-position four-way solenoid directional valve 60 is in the middle position for the stop state, the left position performs the contraction process, and the right position performs the extension process. The hydraulically controlled check valve 62 is used to prevent the oil in the push-pull cylinder 1 from flowing back in the stop state, so as to realize the hydraulic buffer of the closed cavity against the reverse impact force.

[0053] Reference Figure 5 The impact load mounting platform includes a magnetic scale column 18, a locking ring 19, an auxiliary bracket 20, a guide rail 21, an impact load 22, a slide seat 23, a cover plate 24, an anti-rebound mechanism base 25, a guide rail support 26, a slide 27, a shock-absorbing buffer pad 28, a stop block 29, a pin 30, a connecting rod 31, a pull rod 32, a connecting rod seat 33, and a shift fork 34. A magnetic scale is attached to the magnetic scale column 18, and its stroke can be read by the reading head 16. The locking ring 19 is used to fix the piston rod of the impact generating device. The auxiliary bracket 20... It can slide on the guide rail 21 to prevent the magnetic scale column 18 from rotating. The guide rail 21 is used to support and guide the movement direction of the impact load 22. The slide seat 23 is equipped with a slide 27, a stop block 29 and a preload spring. A shock-absorbing buffer pad 28 is provided between the slide 27 and the stop block 29 to absorb the rebound impact energy. The pin 30, the connecting rod 31, the connecting rod seat 33 and the shift fork 34 form a triggering linkage mechanism. There are 4 triggering linkages in total, one on each side and one on the top and bottom. The pull rod 32 is used to manually reset the slide 27 and the stop block 29.

[0054] Reference Figure 6 , Figure 7Before the anti-rebound mechanism is triggered, the slide 27 and the impact block 29 are in a retracted state, and the pin 30 is inserted into the slide seat 23 to prevent the slide 27 from extending under the action of the preload spring. When the impact load 22 passes through the anti-rebound mechanism, its left and right triggering protrusions 40 strike the fork 34, causing the connecting rod 31 to rotate and pull out the pin 30, thereby unlocking the slide 27 and causing it to extend quickly, forming a barrier against the rebound of the impact load 22. This triggering method has a short response time and low energy loss, meeting the requirements of impact testing.

[0055] Reference Figure 8 The impact load 22 includes four types: 50kg, 100kg, 200kg, and 400kg. Each type of load, in addition to the load block itself, includes a reflector 35, a reflector bracket 36, a lifting ring 37, a guide rail slider 38, a phenolic resin gasket 39, and a trigger protrusion structure 40. The reflector 35 is used to reflect the laser from the laser displacement sensor 47 to read the stroke and speed of the impact load 22. The lifting ring 37 is used for suspension installation. The guide rail slider 38 and the phenolic resin gasket 39 are used to slide on the guide rail 21 and reduce the loss of impact energy due to sliding friction. The trigger protrusion structure 40 is used to collide with the shift fork 34 to trigger the extension of the slide block 27 of the anti-rebound mechanism.

[0056] Reference Figure 9 The sample mounting frame includes a base 41, a sensor bracket 42, a lower impact seat 43, a lower clamp 44, a sample 45, a cover 46, a laser displacement sensor 47, an upper clamp 48, a slide 49, and an upper impact seat 50. The base 41 is responsible for bearing the main impact force and is welded from multiple sheet steel plates. The separate design of the sensor bracket 42 and the base 41 is to prevent impact damage to the laser displacement sensor 47 installed in the cover 46. The upper clamp 48 and the lower clamp 44 can be replaced according to the different specifications and sizes of the sample 45. The trapezoidal structure of the upper impact seat 50 and the lower impact seat 43 provides space for the fracture deformation of the sample 45 while meeting the impact resistance requirements.

[0057] Reference Figure 10 , Figure 11 The platform base includes a left half base 51, a right half base 52, a movable guardrail 53, and foot components 54. The left half base 51 and the right half base 52 are connected by bolts. The movable guardrail 53 can be moved and adjusted on the sliding groove of the platform base. The 36 foot components 54 can keep the base in a horizontal state by adjusting the adjusting pads and adjusting screws. The base plate at the bottom of the foot components 54 is welded to three specifications of pre-embedded parts embedded in the concrete foundation, which can transmit and disperse the huge impact force generated by the impact load 22 and the sample 45 to the ground.

[0058] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A trigger-extended anti-rebound impact test bench, characterized in that: include: Impact generating device mounting frame, impact load mounting frame, sample mounting frame, frame base and sensing system; The impact generating device mounting frame includes a movable frame, a guide column support, and a cylinder support. The movable frame has a front plate, a guide sleeve, a guide sleeve seat, and a hinged lifting ring head piston rod. The movable frame is used to install and fix the impact generating device. The front plate has a circular hole in the middle for the piston rod of the impact generating device to pass through, and square holes on both inner sides for the guide rail to pass through. The two cylinders of the cylinder support control two symmetrical piston rods on the left and right sides through a hydraulic system to push the front plate to move in the same direction to meet different load impact strokes and achieve stepless adjustment. The symmetrical hinged lifting ring head piston rod, guide sleeve, and guide column maintain the symmetrical movement and vertical balance of the frame. The front panel is equipped with a sensor bracket, a pull rod sensor, a reading head bracket, a reading head, and a guide seat. The pull rod sensor is used to measure the travel of the moving platform. The impact load mounting platform includes a magnetic scale column, a locking ring, an auxiliary bracket, a guide rail, an impact load, a slide seat, a cover plate, an anti-rebound mechanism base, an anti-rebound mechanism, a guide rail support, a slide, a shock-absorbing buffer pad, a stop block, a pin, a connecting rod, a pull rod, a connecting rod seat, and a shift fork. A magnetic scale is attached to the magnetic scale column, and its stroke can be read by a reading head. The impact load is equipped with a trigger protrusion structure and a reflector for laser displacement sensor ranging. The guide rail supports and guides the impact load. The anti-rebound mechanism includes a shift fork, a connecting rod, a pin, a slide, a stop block, and a shock-absorbing buffer pad. When the impact load passes through the anti-rebound mechanism, its left and right trigger protrusion structures impact the shift fork, causing the connecting rod to rotate and the pin to be pulled out, thereby unlocking the slide and causing it to extend rapidly, forming a barrier against the rebound of the impact load. The shock-absorbing buffer pad is used to absorb the rebound impact energy. The anti-rebound mechanism is symmetrically arranged on the left and right, with two on each side, one above and one below. The sample mounting frame includes a trapezoidal impact base and a laser displacement sensor assembly; The base assembly can keep the base level by adjusting the adjusting pads and adjusting screws. The base plate at the bottom of the base assembly is welded to the embedded parts buried in the concrete foundation to disperse the impact force.

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