Anti-rebound load module and acceleration device test system

Abstract

The invention discloses an anti-rebound load module and an acceleration device test system, the anti-rebound load module comprises a base, a separation mechanism and a load mechanism, and the separation mechanism and the load mechanism are respectively installed on the base; the separating mechanism is used for being connected with the driving end of the accelerating device and separating relative to the driving end when the driving end accelerates and moves to a certain stroke; the load mechanism comprises a guide column and a load assembly arranged on the guide column in a sleeving mode, the first end of the guide column is connected with the base, a limiting platform is arranged at the second end of the guide column, a moving space of the load assembly is formed between the base and the limiting platform, and the thickness of the load assembly in the length direction of the guide column is smaller than the height of the moving space. The load assembly is used for moving on the guide column in the direction opposite to the rebound acting force when the base generates the rebound acting force so as to offset the rebound acting force. The anti-rebound load module provided by the invention eliminates the rebound acting force by utilizing the internal collision of the self-load, and can meet the anti-rebound requirement of a large-mass and high-speed moving test piece.

Description

Technical Field

[0001] The present invention relates to the technical field of collision tests, and in particular to an anti-rebound load module and an acceleration device test system using the anti-rebound load module. Background Art

[0002] At present, in order to evaluate the safety of maglev trains under collision conditions, the most direct way is to accelerate the sample to a specified speed through an acceleration device, and then perform a head-on collision on the static train. The mass of the sample ranges from 100kg to 800kg, and the maximum speed is 200km / h.

[0003] In order to ensure that the acceleration device can meet the collision test conditions of the maglev train, the acceleration performance of the acceleration device needs to be tested first. However, since the test operation has relatively high quality and speed requirements for the sample, if the sample is used directly for testing, the sample will hit the ground at high speed and rebound after being hit by the acceleration device, seriously endangering the safety of surrounding equipment and personnel. Therefore, a special load module needs to be designed to replace the sample for acceleration testing. The load module must have an anti-rebound function to avoid rebounding after high-speed collision.

[0004] However, the anti-rebound design of the existing load module mainly uses springs, rubber and other buffers to absorb the impact energy, thereby preventing the test object from rebounding. This method has low energy absorption efficiency and will be damaged after a strong impact. It is not suitable for the anti-rebound requirements of large-mass, high-speed moving test objects. Another anti-rebound design is to use hydraulic buffer technology. Although it can be used for large energy buffering and anti-rebound effects, its structure is complex and costly. At the same time, the buffering speed range of the hydraulic buffer device generally does not exceed 6m / s, which is completely unable to meet the 200km / h high-speed impact requirements of the collision test of the maglev train. Summary of the invention

[0005] The present invention primarily provides an anti-rebound load module to solve the technical problem that the anti-rebound design of the existing load module cannot be applied to the anti-rebound requirements of a large-mass, high-speed moving test piece.

[0006] The present invention also provides an acceleration device testing system, which adopts the anti-rebound load module.

[0007] According to one aspect of the present invention, there is provided an anti-rebound load module, which is used to be hit by an acceleration device and hit the ground to test the acceleration performance of the acceleration device, and the anti-rebound load module includes a base, and a separation mechanism and a load mechanism respectively mounted on the base;

[0008] The disengagement mechanism is used to be connected to the driving end of the acceleration device and to be disengaged relative to the driving end when the driving end accelerates and moves to a certain stroke;

[0009] The load mechanism includes a guide column and a load component mounted on the guide column, the first end of the guide column is connected to the base, the second end of the guide column is provided with a limiting platform, and an activity space for the load component is formed between the base and the limiting platform. The thickness of the load component along the length direction of the guide column is smaller than the height of the activity space. The load component is used to move on the guide column in the opposite direction of the rebound force when the base generates a rebound force, thereby offsetting the rebound force.

[0010] Preferably, the load assembly includes a plurality of load discs, a guide hole adapted to the guide column is opened at the center of the load disc, and the plurality of load discs are stacked and sleeved on the guide column in sequence through the guide hole.

[0011] Preferably, the limiting platform and the guide column are integrally formed, a threaded hole is provided on the base, and a first screw threadedly connected to the threaded hole is provided at the first end of the guide column.

[0012] Preferably, the load mechanism also includes an adjusting nut, a second screw is provided at the second end of the guide column, the adjusting nut is threadedly connected to the second screw and constitutes the limiting platform, and the adjusting nut is used to move axially relative to the second screw through threaded cooperation to adjust the height of the activity space.

[0013] Preferably, the detachment mechanism is arranged at the center of the base, and a plurality of the loading mechanisms are provided, and the plurality of loading mechanisms are arranged in a circular array with the detachment mechanism as the center point.

[0014] Preferably, the disengagement mechanism comprises a connection seat and a locking assembly arranged on the connection seat, the connection seat is connected to the base and is provided with a connection hole, the connection hole is used to plug the driving end of the acceleration device, the locking assembly comprises a lock tongue and a limit pin, the lock tongue is rotatably mounted on the side wall of the connection hole and is used to abut against a preset limit step on the driving end, and the limit pin is used to be plugged into the connection seat and limit the rotation of the lock tongue;

[0015] The limit pin is used to be connected to the fixed end of the acceleration device through a rope and is driven by the rope to separate from the connecting seat when the driving end of the acceleration device accelerates and moves to a certain stroke, thereby releasing the limiting effect on the lock tongue. The lock tongue is also used to be driven by the driving end of the acceleration device to rotate and release the limiting effect on the limit step after the limit is released.

[0016] Preferably, a mounting groove penetrating the connecting seat along the radial direction of the connecting hole is formed on the side wall of the connecting hole, a pin hole extending into the mounting groove is formed on the end surface of the connecting seat along the axial direction of the connecting hole, the locking tongue is rotatably mounted in the mounting groove, and the limiting pin is used to be inserted into the pin hole;

[0017] The locking tongue includes a first limiting portion and a second limiting portion which are arranged at an angle along the rotation direction thereof, the first limiting portion being used to abut against a limiting step preset on the driving end, the second limiting portion being used to be abutted and limited by the limiting pin when the first limiting portion abuts against the limiting step, and the second limiting portion being driven to rotate to protrude from the outside of the mounting groove after the first limiting portion rotates to disengage from the limiting step.

[0018] Preferably, the locking assemblies are provided in plurality, and the plurality of locking assemblies are arranged equidistantly along the circumference of the connecting hole.

[0019] Preferably, the detachment mechanism and the load mechanism are both installed on the same surface of the base, and the anti-rebound load module further comprises an elastic buffer layer arranged on a surface of the base away from the detachment mechanism.

[0020] As a second aspect, the present invention also provides an acceleration device testing system, comprising an acceleration device and a detection device, as well as the above-mentioned anti-rebound load module, wherein the anti-rebound load module is connected to the acceleration device and is used to be hit by the acceleration device and hit the ground, and the detection device is used to detect the speed of the anti-rebound load module to test the acceleration performance of the acceleration device.

[0021] The present invention has the following beneficial effects:

[0022] The anti-rebound load module provided by the present invention is connected to the driving end of the acceleration device through a disengagement mechanism and can automatically disengage from the driving end when the driving end accelerates and moves to a certain stroke, so that the anti-rebound load module is quickly knocked out and hits the ground. Since the load mechanism forms an activity space of the load component through the mutual limiting action of the limiting platform on the guide column and the base, the load component can move freely in the activity space along the length direction of the guide column. In the process of the anti-rebound load module being driven to accelerate and fly toward the ground, the load component will be moved to the end of the activity space away from the ground by inertia. When the base hits the ground and starts to rebound and move upward, the load component can be moved to the end of the activity space facing the ground by inertia, hindering the overall rebound trend of the anti-rebound load module. At the same time, after the load component collides with the base, it will rebound upward along the guide column, move upward to the top of the activity space, and then rebound downward again. The overall kinetic energy of the anti-rebound load module is gradually dissipated through multiple repeated collisions between the load component and the base, which can greatly weaken the rebound movement, and use its own load to eliminate the rebound force. It can be suitable for the anti-rebound requirements of large-mass and high-speed moving test pieces.

[0023] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 A three-dimensional diagram of an anti-rebound load module provided by an embodiment of the present invention;

[0026] Figure 2 for Figure 1 A cross-sectional structural diagram of a load mechanism in an anti-rebound load module shown;

[0027] Figure 3 for Figure 1 The assembly structure diagram of the anti-rebound load module and the acceleration device shown;

[0028] Figure 4 for Figure 3 The state diagram of the anti-rebound load module shown in the figure shows the state where the limit pin is separated from the connecting seat;

[0029] Figure 5 for Figure 4 The state diagram of the anti-rebound load module shown shows the state of disengagement of the relative acceleration device.

[0030] Legend:

[0031] 1000, anti-rebound load module; 1, base; 11, threaded hole; 2, disengagement mechanism; 21, connection seat; 211, connection hole; 212, mounting slot; 213, pin hole; 22, locking assembly; 221, lock tongue; 2211, first limiting portion; 2212, second limiting portion; 222, limiting pin; 223, rope; 3, load mechanism; 31, guide column; 311, limiting platform; 312, first screw rod; 32, load assembly; 321, load disc; 4, elastic buffer layer;

[0032] 2000. Acceleration device; 2001. Driving end; 2002. Limiting step. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0034] Figures 1 to 5 An anti-rebound load module and an acceleration device testing system provided by an embodiment of the present invention are jointly shown, wherein the anti-rebound load module is used to be installed on the acceleration device and hit the ground through the acceleration device to test the acceleration performance of the acceleration device. The anti-rebound load module has a better anti-rebound function and can use its own load to eliminate the rebound force. It can be applied to the anti-rebound requirements of large-mass, high-speed moving collision test pieces.

[0035] like Figure 1 As shown, the anti-rebound load module 1000 includes a base 1, a disengagement mechanism 2 and a loading mechanism 3. The base 1 adopts a plate-like structure, and its two opposite surfaces are respectively set as a collision surface and a mounting surface. The collision surface is used to hit the ground. The disengagement mechanism 2 and the loading mechanism 3 are both installed on the mounting surface, that is, the disengagement mechanism 2 and the loading mechanism 3 do not contact the ground during the test.

[0036] Furthermore, the disengagement mechanism 2 is used to be connected to the driving end 2001 of the acceleration device 2000 and to be disengaged from the driving end 2001 when the driving end 2001 is accelerated to a certain stroke, so that the anti-rebound load module 1000 can be driven by the driving end 2001 of the acceleration device 2000 to accelerate to a certain speed and then quickly disengage from the driving end 2001, so that the anti-rebound load module 1000 can fly out and hit the ground in a large mass and high-speed motion state that meets the test requirements.

[0037] like Figure 2As shown, the load mechanism 3 includes a guide column 31 and a load component 32 mounted on the guide column 31, the first end of the guide column 31 is connected to the base 1, and the second end of the guide column 31 is provided with a limiting platform 311, and a movable space for the load component 32 is formed between the base 1 and the limiting platform 311, and the thickness of the load component 32 along the length direction of the guide column 31 is smaller than the height of the movable space, so that the load component 32 can move up and down along the guide column 31 in the movable space, and the load component 32 is used to move on the guide column 31 in the opposite direction of the rebound force when the base 1 generates a rebound force, thereby offsetting the rebound force.

[0038] Please combine Figures 3 to 5 Specifically, the anti-rebound load module 1000 is connected to the driving end 2001 of the acceleration device 2000 through the disengagement mechanism 2 and can automatically disengage from the driving end 2001 when the driving end 2001 accelerates and moves to a certain stroke, so that the anti-rebound load module 1000 is quickly knocked out and hits the ground. Since the load mechanism 3 forms an activity space for the load component 32 through the mutual limiting action of the limiting platform 311 on the guide column 31 and the base 1, the load component 32 can move freely in the activity space along the length direction of the guide column 1. In the process of the anti-rebound load module 1000 being driven to accelerate and fly out toward the ground, the load component 32 will be moved to the activity space by inertia. At the end of the activity space away from the ground, when the base 1 hits the ground and starts to rebound upward, the load component 32 can be moved to the end of the activity space facing the ground under the action of inertia and hit the base 1, thereby hindering the overall rebound trend of the anti-rebound load module 1000. At the same time, after the load component 32 collides with the base 1, it will rebound upward along the guide column 31, move upward to the top of the activity space, and then rebound downward again. Through multiple repeated collisions between the load component 32 and the base 1, the overall kinetic energy of the anti-rebound load module 1000 is gradually dissipated, which can greatly weaken the rebound movement, and use its own load to eliminate the rebound force, which can be suitable for the anti-rebound requirements of large-mass and high-speed moving test pieces.

[0039] like Figure 2As shown, the load assembly 32 includes a plurality of load discs 321, and a guide hole matching the guide column 31 is opened at the center of the load disc 321, and the plurality of load discs 321 are stacked and sleeved on the guide column 31 in sequence through the guide hole. Since the load assembly 32 is formed by combining a plurality of load discs 321, it is not only possible to flexibly increase or decrease the specific number of the load discs 321 according to the quality requirements of the collision test, and adjust the overall quality of the anti-rebound load module 1000, but more importantly, when the anti-rebound load module 1000 as a whole shows a rebound trend, the kinetic energy can be dissipated through the mutual collision between two adjacent load discs 321. The reciprocating collision between the plurality of load discs 321 can quickly dissipate the overall rebound force, and the anti-rebound effect is better.

[0040] Preferably, the position limiting platform 311 and the guide column 31 are integrally formed, a threaded hole 11 is provided on the base 1, and a first screw rod 312 is provided at the first end of the guide column 31 to be threadedly connected to the threaded hole 11. Since the position limiting platform 311 and the guide column 31 are integrally formed, the first end of the guide column 31 is passed through a plurality of load discs 321 in sequence and then connected and fixed relative to the threaded hole 11, so that the locking and limiting of both ends of the load assembly 32 can be achieved at the same time, and the assembly structure is simple and efficient, and is convenient and quick to disassemble and assemble.

[0041] In other embodiments, the limiting platform 311 can also be designed in a split type relative to the guide column 31. Specifically, the load mechanism 3 also includes an adjusting nut. The second end of the guide column 31 is provided with a second screw. The adjusting nut is threadedly connected to the second screw and constitutes the limiting platform 311. The adjusting nut is used to move axially relative to the second screw through threaded cooperation to adjust the height of the activity space. That is, the activity stroke of the load component 32 is limited by the adjusting nut. When the weight of the load component 32 is reduced according to the mass requirement and the thickness of the load component 32 becomes thinner, the axial position of the adjusting nut can be appropriately adjusted to reduce the height of the activity space, control the activity stroke of the load component 32 within a reasonable range, and avoid the activity stroke of the load component 32 being too large to affect the anti-rebound effect; similarly, when the weight of the load component 32 is increased according to the mass requirement and the thickness of the load component 32 becomes thicker, the axial position of the adjusting nut can also be appropriately adjusted to expand the height of the activity space, and control the activity stroke of the load component 32 within a reasonable range.

[0042] like Figure 1As shown, the disengagement mechanism 2 is arranged at the center position of the base 1, and a plurality of the load mechanisms 3 are provided, and the plurality of load mechanisms 3 are arranged in a circular array with the disengagement mechanism 2 as the center point, that is, the plurality of load mechanisms 3 are evenly distributed around the disengagement mechanism 2, so that the weight around the disengagement mechanism 2 is even, and after the disengagement mechanism 2 is separated from the driving end 2001 of the acceleration device 2000, the anti-rebound load module 1000 as a whole can stably fly out in the vertical direction and hit the ground, and the impact force is borne by the surface of the base 1 with a larger area, so that the impact force is dispersed, so as to avoid excessive concentration of force to produce a greater rebound tendency or even damage, and at the same time, it can also prevent the base 1 from tilting and affecting the flight trajectory and flight speed, thereby ensuring the accuracy of the test results.

[0043] Please combine Figure 1 and Figure 3 The disengagement mechanism 2 includes a connecting seat 21 and a locking assembly 22 arranged on the connecting seat 21. The connecting seat 21 is connected to the base 1 and is provided with a connecting hole 211. The connecting hole 211 is used to plug in the driving end 2001 of the acceleration device 2000. The locking assembly 22 includes a locking tongue 221 and a limiting pin 222. The locking tongue 221 is rotatably mounted on the side wall of the connecting hole 211 and is used to abut against a preset limiting step 2002 on the driving end 2001. The limiting pin 222 is used to be plugged into the connecting seat 21 and limit the rotation of the locking tongue 222.

[0044] Please combine Figure 4 and Figure 5 The limit pin 222 is used to be connected to the fixed end (not shown in the figure, the same below) of the acceleration device 2000 through a rope 223 and is driven by the rope 223 to separate from the connecting seat 21 when the driving end 2001 of the acceleration device 2000 accelerates and moves to a certain stroke, thereby releasing the limiting effect on the lock tongue 221. The lock tongue 221 is also used to be driven by the driving end 2001 of the acceleration device 2000 to rotate and release the limiting effect on the limiting step 2002 after the limit is released.

[0045] Specifically, Figure 4 and Figure 5The arrow indicates the moving direction of the anti-rebound load module 1000. Since the limit pin 222 is connected and fixed by the rope 223, after the driving end 2001 of the acceleration device 2000 is accelerated to a certain stroke, the limit pin 222 can be pulled out by the rope 223. At this time, the limiting effect on the lock tongue 221 is released, and the lock tongue 221 can rotate freely. Since the rebound load module 1000 will continue to move downward at a high speed, the lock tongue 221 can be driven by the limit step 2002 to rotate to a state avoiding the limit step 2002, thereby releasing the limiting effect on the limit step 2002. At this time, the anti-rebound load module 1000 can completely break away from the driving end 2001 and automatically fly downward to complete the test operation. The disengagement mechanism 2 has a simple, efficient and stable structure. It can not only stably lock the driving end 2001 in a locked state, but also automatically disengage from the driving end 2001 in an accelerated moving state. There will be no disengagement failure causing damage to the equipment, and it can be reused, with quick and easy operation.

[0046] Preferably, a mounting groove 212 is provided on the side wall of the connecting hole 211 and penetrates the connecting seat 21 along the radial direction of the connecting hole 211, and a pin hole 213 is provided on the end face of the connecting seat 21 along the axial direction of the connecting hole 211 and extends into the mounting groove 212, the locking tongue 221 is rotatably installed in the mounting groove 212, and the limiting pin 222 is used to be inserted into the pin hole 213.

[0047] Furthermore, the locking tongue 221 includes a first limiting portion 2211 and a second limiting portion 2212 which are arranged at an angle along the rotation direction thereof, the first limiting portion 2211 being used to abut against a limiting step 2002 preset on the driving end 2001, the second limiting portion 2212 being used to be abutted and limited by the limiting pin 222 when the first limiting portion 2211 abuts against the limiting step 2002, and the second limiting portion 2212 being driven to rotate to protrude from the outer side of the mounting groove 212 after the first limiting portion 2211 rotates away from the limiting step 2002. Specifically, when the first limiting portion 2211 abuts against the limiting step 2002, the second limiting portion 2212 is in a state of facing the limiting pin 222, and the limiting pin 222 can abut against the side wall to limit the rotation of the second limiting portion 2212, thereby limiting the rotation of the first limiting portion 2211, so that the first limiting portion 2211 can stably lock the limiting step 2002; after the limiting pin 222 is pulled out, the first limiting portion 2211 can rotate upward under the drive of the limiting step 2002, and at this time, the second limiting portion 2212 is facing the securing pin 222. The outer side of the mounting groove 212 is rotated, and after the first limiting portion 2211 is completely separated from the limiting step 2002, the second limiting portion 2212 protrudes from the outer side of the mounting groove 212 (the side away from the connecting hole 211). When performing the next test operation, after the driving end 2001 is fully inserted into the connecting hole 211, the second limiting portion 2212 can be manually pushed to rotate directly from the outer side of the mounting groove 212 to achieve the locking and limiting of the driving end 2001 by the locking tongue 221. There is no need to use special tools for locking, which is beneficial to improving the convenience of operation.

[0048] Preferably, the locking assembly 22 is provided in plurality, and the plurality of locking assemblies 22 are arranged equidistantly along the circumference of the connecting hole 211. In the present embodiment, the locking assembly 22 is provided in two, and the two locking assemblies 22 are symmetrically arranged on opposite sides of the connecting hole 211, so as to respectively lock and limit the opposite sides of the driving end 2001, and the force is evenly applied to ensure the locking effect. In other embodiments, the number of the locking assemblies 22 can also be adjusted according to the specific size of the disengagement mechanism 2 and the mass requirement of the load assembly 32. For example, when the connecting hole 211 is large or the mass of the load assembly 32 is large, three or more locking assemblies 22 can be arranged along the circumference of the connecting hole 211, and more locking assemblies 22 are used to simultaneously lock and limit, so as to ensure the connection strength and stability.

[0049] Furthermore, the connecting seat 21 is detachably mounted on the base 1 by bolts, so that connecting seats 21 of different specifications can be replaced to adapt to driving ends of different acceleration devices, thereby improving applicability.

[0050] like Figure 1 As shown, the detachment mechanism 2 and the load mechanism 3 are both installed on the same surface of the base 1, and the anti-rebound load module 1000 also includes an elastic buffer layer 4 provided on a surface of the base 1 away from the detachment mechanism 2. The elastic buffer layer 4 can be made of elastic buffer materials such as rubber and silicone. The elastic buffer layer 4 hits the ground to provide a certain buffer protection for the anti-rebound load module 1000 as a whole, avoiding damage caused by rigid collision. The elastic buffer layer 4 can also further reduce the elastic force and improve the anti-rebound effect.

[0051] As a second aspect, the present invention also provides an acceleration device testing system, including an acceleration device 2000 and a detection device (not shown in the figure, the same below), as well as the above-mentioned anti-rebound load module 1000, wherein the anti-rebound load module 1000 is connected to the acceleration device 2000 and is used to be hit by the acceleration device 2000 and hit the ground, and the detection device is used to detect the speed of the anti-rebound load module 1000 to test the acceleration performance of the acceleration device 2000.

[0052] Since the anti-rebound load module 1000 can effectively dissipate the overall rebound trend, greatly weaken the rebound movement, and use its own load to eliminate the rebound force, it can be applied to the anti-rebound requirements of large-mass, high-speed moving test pieces, so that the acceleration device test system can be applied to the test operations in the high-speed collision test of the maglev train, and has strong applicability.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-rebound load module, used to be launched by an acceleration device (2000) and hit the ground to test the acceleration performance of the acceleration device (2000), characterized in that: The anti-rebound load module comprises a base (1), and a separation mechanism (2) and a load mechanism (3) respectively mounted on the base (1); The disengagement mechanism (2) is used to be connected to the driving end (2001) of the acceleration device (2000) and to be disengaged from the driving end (2001) when the driving end (2001) accelerates and moves to a certain stroke; The load mechanism (3) comprises a guide column (31) and a load component (32) sleeved on the guide column (31); the first end of the guide column (31) is connected to the base (1); the second end of the guide column (31) is provided with a limiting platform (311); a movable space for the load component (32) is formed between the base (1) and the limiting platform (311); the thickness of the load component (32) along the length direction of the guide column (31) is smaller than the height of the movable space; the load component (32) is used to move on the guide column (31) in the opposite direction of the rebound force when the base (1) generates a rebound force, thereby offsetting the rebound force.

2. The anti-rebound load module according to claim 1, characterized in that: The load assembly (32) comprises a plurality of load discs (321), a guide hole adapted to the guide column (31) is opened at the center of the load disc (321), and the plurality of load discs (321) are stacked and sleeved on the guide column (31) in sequence through the guide hole.

3. The anti-rebound load module according to claim 1, characterized in that: The limiting platform (311) and the guide column (31) are integrally formed, a threaded hole (11) is provided on the base (1), and a first screw rod (312) threadedly connected to the threaded hole (11) is provided at the first end of the guide column (31).

4. The anti-rebound load module according to claim 1, characterized in that: The load mechanism (3) also includes an adjusting nut. A second screw is provided at the second end of the guide column (31). The adjusting nut is threadedly connected to the second screw and forms the limiting platform (311). The adjusting nut is used to move axially relative to the second screw through threaded engagement to adjust the height of the activity space.

5. The anti-rebound load module according to claim 1, characterized in that: The detachment mechanism (2) is arranged at the center of the base (1), and a plurality of the loading mechanisms (3) are provided, and the plurality of loading mechanisms (3) are arranged in a circular array with the detachment mechanism (2) as the center point.

6. The anti-rebound load module according to claim 1, characterized in that: The disengagement mechanism (2) comprises a connection seat (21) and a locking assembly (22) arranged on the connection seat (21); the connection seat (21) is connected to the base (1) and is provided with a connection hole (211); the connection hole (211) is used for plugging the driving end (2001) of the acceleration device (2000); the locking assembly (22) comprises a locking tongue (221) and a limiting pin (222); the locking tongue (221) is rotatably mounted on the side wall of the connection hole (211) and is used for abutting against a preset limiting step (2002) on the driving end (2001); the limiting pin (222) is used for plugging on the connection seat (21) and limiting the rotation of the locking tongue (221); The limit pin (222) is used to be connected to the fixed end of the acceleration device (2000) via a rope (223) and is driven by the rope (223) to detach from the connecting seat (21) when the driving end (2001) of the acceleration device (2000) accelerates and moves to a certain stroke, thereby releasing the limiting effect on the locking tongue (221). The locking tongue (221) is also used to be driven by the driving end (2001) of the acceleration device (2000) to rotate and release the limiting effect on the limiting step (2002) after the limiting effect is released.

7. The anti-rebound load module according to claim 6, characterized in that: A mounting groove (212) is provided on the side wall of the connecting hole (211) and penetrates the connecting seat (21) along the radial direction of the connecting hole (211); a pin hole (213) is provided on the end surface of the connecting seat (21) along the axial direction of the connecting hole (211) and extends into the mounting groove (212); the locking tongue (221) is rotatably mounted in the mounting groove (212); and the limiting pin (222) is used to be inserted into the pin hole (213); The locking tongue (221) comprises a first limiting portion (2211) and a second limiting portion (2212) which are arranged at an angle along the rotation direction thereof, wherein the first limiting portion (2211) is used for abutting against a limiting step (2002) preset on the driving end (2001), and the second limiting portion (2212) is used for being abutted and limited by the limiting pin (222) when the first limiting portion (2211) abuts against the limiting step (2002), and the second limiting portion (2212) is also used for being driven to rotate to protrude from the outer side of the mounting groove (212) after the first limiting portion (2211) rotates to disengage from the limiting step (2002).

8. The anti-rebound load module according to claim 6 or 7, characterized in that: The locking components (22) are provided in plurality, and the plurality of locking components (22) are arranged equidistantly along the circumference of the connecting hole (211).

9. The anti-rebound load module according to claim 1, characterized in that: The detachment mechanism (2) and the load mechanism (3) are both mounted on the same surface of the base (1), and the anti-rebound load module further comprises an elastic buffer layer (4) arranged on a surface of the base (1) away from the detachment mechanism (2).

10. An acceleration device testing system, comprising an acceleration device (2000) and a detection device, characterized in that: The acceleration device testing system further comprises an anti-rebound load module as claimed in any one of claims 1 to 9, wherein the anti-rebound load module is connected to the acceleration device (2000) and is used to be driven out through the acceleration device (2000) and hit the ground, and the detection device is used to detect the speed of the anti-rebound load module to test the acceleration performance of the acceleration device (2000).

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