Crash test protection device

Abstract

The application discloses a collision test protection device, which comprises a protection frame, a buffer oil cylinder arranged in a cavity of the protection frame, a piston rod of the buffer oil cylinder arranged towards an opening, a buffer plate arranged on the piston rod of the buffer oil cylinder and corresponding to the opening, a lever arranged on the buffer plate and moving with the piston rod of the buffer oil cylinder, a swing arm in rotational cooperation with the protection frame, one end of the swing arm forming a driving section and the other end forming an intercepting section, the swing arm being switched between an open state and a closed state through swinging around the center of rotation, and the piston rod of the buffer oil cylinder being contracted due to impact and driving the lever to drive the driving section of the swing arm, so that the swing arm is switched from the open state to the closed state. The application can convert part of the collision energy into kinetic energy of the blocking structure, does not need measuring, controlling and fast-response executing elements, and can complete blocking through a mechanical structure during the collision process, so that the response speed is fast and the stability is good.

Description

Technical Field

[0001] This invention relates to the field of high-speed collision testing technology, and in particular, to a collision testing protection device. Background Technology

[0002] To assess the safety of maglev trains under collision conditions, the most direct method is to accelerate the acceleration module to a specified speed and then subject it to a head-on collision with the stationary train. The acceleration module has a mass of 100 kg and a maximum speed of 200 km / h. To prevent the acceleration module from impacting the ground at high speed after being launched during the test and causing damage to the ground structure, it is necessary to buffer and absorb the collision energy of the acceleration module. At the same time, it is also necessary to prevent the rebound caused by the incomplete absorption of energy and the reset of the buffer cylinder after the collision, so as to avoid injury to surrounding equipment and personnel.

[0003] Existing impact protection mainly relies on detection unit control to detect the position of the acceleration module and trigger the actuator to block the rebound channel of the acceleration module at the appropriate time. Such devices rely on complex electrical control and fast-response actuators, which are complex to control and costly. At the same time, the blocking speed is generally slow, and there is a risk that the acceleration module may fly out due to untimely blocking under high-speed rebound conditions. Summary of the Invention

[0004] This invention provides a collision test protection device to solve the technical problems of existing collision protection devices that rely on electrical control, have slow blocking speed, and have the risk of the acceleration module flying out due to untimely blocking.

[0005] According to one aspect of the present invention, a collision test protection device is provided, comprising: a protective frame having a cavity formed therein, and an opening communicating with the cavity being formed on one side of the protective frame; a buffer cylinder disposed within the cavity of the protective frame, the piston rod of the buffer cylinder being disposed towards the opening, and a buffer plate corresponding to the opening being disposed on the piston rod of the buffer cylinder; a lever disposed on the buffer plate and moving with the extension and retraction of the piston rod of the buffer cylinder; and a rocker arm rotatably cooperating with the protective frame, wherein the rocker arm is divided by a rotation center, the end of the rocker arm near the lever forming a driving section, and the end of the rocker arm away from the lever forming an intercepting section; by swinging the rocker arm around the rotation center, the rocker arm is switched between an open state and a closed state, the driving section in the open state being located on the moving path of the lever, and the intercepting section in the open state being located outside the opening area; the intercepting section in the closed state being located within the opening area to block the opening; the piston rod of the buffer cylinder retracts upon impact, thereby driving the lever to move the driving section of the rocker arm, causing the rocker arm to switch from the open state to the closed state.

[0006] By adopting the above technical solution, the acceleration module enters the protective frame through the opening and collides with the buffer plate. The buffer cylinder can buffer and absorb the collision energy. At the same time, when the buffer cylinder absorbs kinetic energy, the piston rod retracts, which in turn drives the lever to move. The lever can drive the rocker arm to swing, so that the intercepting section of the rocker arm enters the opening area to block the rebounding acceleration module and prevent the acceleration module from flying out of the cavity. Through the lever and rocker arm structure, a part of the collision energy is converted into the kinetic energy of the blocking structure. There is no need for measurement, control and fast response actuators. The blocking can be completed by mechanical structure during the collision process. The response speed is fast and the stability is good.

[0007] Optionally, multiple rocker arms are arranged circumferentially around the opening, and the intercepting sections of the rocker arms arranged opposite each other are interlocked in the closed state.

[0008] By adopting the above technical solution, multiple rocker arms can reduce the size of the gap at the opening, reducing the risk of the acceleration module flying out from the gap between the interception section and the edge of the opening. During interception, the multiple interception sections can interlock to distribute the impact force of the acceleration module to each rocker arm, reducing the risk of the rocker arm deforming or being damaged under impact, and improving the stability of the interception.

[0009] Optionally, the protective frame has a sliding rod on each side of the opening, and the sliding rods are arranged perpendicularly to the piston rod of the buffer cylinder in space. The rocker arms are arranged on the sliding rods, and the rocker arms correspond one-to-one with the sliding rods. The rocker arms swing around the circumference of the sliding rods and slide with the sliding rods along the length of the sliding rods. The sliding rods are provided with elastic elements, which are used to form an elastic abutting force when the two rocker arms are engaged to prevent the two rocker arms from loosening after engagement. The intercepting section of the rocker arm has a wedge-shaped surface and a barb. During the process of the two rocker arms switching from the open state to the closed state, the wedge-shaped surfaces of the intercepting sections of the two rocker arms abut against each other and generate a component force along the direction of the sliding rod, causing the two rocker arms to move away from each other along the length of the sliding rod. When the two rocker arms switch from the open state to the closed state, the elastic elements lock the sliding of the rocker arms along the direction of the sliding rod, and the barbs of the intercepting sections engage with each other to lock the swing of the rocker arms around the circumference of the sliding rod.

[0010] By adopting the above technical solution, the barb at the interception end can lock the rocker arm to swing around the slide rod in a circumferential direction, and the thrust of the elastic element can lock the rocker arm to slide along the slide rod. The two work together to ensure that the rocker arm will neither slide nor rotate in the closed state, and is not easy to move due to the impact of the acceleration module, which would cause the interception to fail. It has good stability. After completing one test, it can push the rocker arm to overcome the locking of the elastic element and move along the slide rod, so that the barb part is disengaged from the engagement state, and the next test can be carried out quickly.

[0011] Optionally, a connecting block is formed on the side of the intercepting segment away from the elastic element, and the hook portion is formed on the side of the connecting block facing the slide rod. The wedge-shaped surface is disposed on the connecting block, and the width of the connecting block in the direction perpendicular to the intercepting segment gradually increases from the position away from the slide rod to the position closer to the slide rod.

[0012] By adopting the above technical solution, when the wedge-shaped surfaces of the two intercepting sections come into contact with each other, the action of the wedge-shaped surfaces causes part of the torque in the swing direction of the rocker arm to generate a thrust in the direction of the slide rod, so that the two intercepting sections can overcome the elastic force of the elastic element and move away from each other, so that the two barbs can fit together. When the two wedge-shaped surfaces meet and separate from each other, under the action of the elastic element, the two intercepting sections approach each other and stick together tightly, and the barbs fit together.

[0013] Optionally, the length of the drive segment and the angle between the drive segment and the interception segment are preset values, so that when the rocker arm is in the closed state, the drive segment of the rocker arm is outside the movement path of the lever.

[0014] By adopting the above technical solution, after the lever moves the rocker arm to the closed state, the drive section disengages from the movement path of the lever. In this way, even if the lever continues to move with the piston rod of the buffer cylinder, it will no longer exert force on the rocker arm. When the impact force of the acceleration module is large and the piston rod of the buffer cylinder retracts to a large length, the rocker arm will disengage from the lever after reaching the closed state, reducing the impact force on the rocker arm and preventing damage due to excessive force.

[0015] Optionally, both the drive segment end and the lever end are smooth arc surfaces.

[0016] By adopting the above technical solution, during the process of the lever moving the drive section and then separating from the drive section, the lever and the drive section slide against each other and the angle changes continuously. By setting the end of the drive section and the end of the lever as smooth arc surfaces, the transmission process can be made smoother and the impact force in this process can be reduced.

[0017] Optionally, the intercepting section includes a first bend and a second bend with obtuse angles. The first bend is connected to the driving section, and a wedge-shaped surface and a barb are disposed on the second bend. In the closed state, the angles between the first bend and the second bend and the buffer plate are both acute angles.

[0018] By adopting the above technical solution, after the acceleration module collides with the buffer plate and rebounds, because the impact path of the acceleration module is perpendicular to the buffer plate, the angle between the rebound path of the acceleration module and the buffer plate is also close. The angles between the first bending part and the second bending part and the force-bearing surface of the buffer plate are both acute angles, so that the acceleration module will not collide perpendicularly with the interception section when rebounding, reducing the direct impact force on the interception section and improving the interception performance of the interception section.

[0019] Optionally, the slide bar is provided with a stop block, and the rocker arm in the open state abuts against the stop block under the action of the elastic element.

[0020] By adopting the above technical solution, the stop block can limit the rocker arm and prevent the rocker arm from moving too far under the action of the elastic element, which would cause the two intercepting sections to fail to engage and lock.

[0021] Optionally, the protective frame includes a base and a support frame. The base is used to install the buffer cylinder. The support frame is vertically fixed on the base and includes a column perpendicular to the base and a crossbeam parallel to the base. Two sets of support frames are arranged in parallel. The buffer cylinder is located between the two support frames. The two ends of the sliding rod are respectively connected to the column of the support frame on the corresponding side. The distance between the sliding rod and the base is less than the distance between the crossbeam and the base. The distance between the engagement position of the closed intercepting section and the base is greater than the distance between the crossbeam and the base.

[0022] By adopting the above technical solution, the two interception sections intercept at the top of the opening, with crossbeams positioned on both sides of the interception sections to prevent the acceleration module from flying out from the side and above the opening after a collision rebound, thus improving the stability of the interception.

[0023] Optionally, a stiffening plate is provided between the column and the base.

[0024] By adopting the above solution, the stiffening plate can improve the stability of the connection between the column and the base, enabling the protective frame to withstand greater collisions and impacts from the acceleration module.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The acceleration module is buffered by a buffer cylinder, which has a good buffering effect. At the same time, when the piston rod of the buffer cylinder retracts, it can drive the lever to move, which in turn causes the lever to push the rocker arm, blocking the rocker arm at the entrance position and preventing the acceleration module from flying out of the cavity. There is no need for measurement, control and fast response actuators. The mechanical structure can complete the blocking during the collision process. The response speed is fast and the stability is good.

[0027] 2. The barb at the interception end can lock the rocker arm's circumferential swing around the slide bar, and the thrust of the elastic element can lock the rocker arm's sliding along the slide bar. The two work together to ensure that the rocker arm will neither slide nor rotate in the closed state, and is not easily moved due to the impact of the acceleration module, which would cause the interception to fail, thus ensuring good stability.

[0028] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0030] Figure 1 This is a three-dimensional structural schematic diagram of the collision test protection device of the present invention;

[0031] Figure 2 This is a front view of the collision test protection device of the present invention with the rocker arm in the open state;

[0032] Figure 3 This is a top view of the collision test protection device of the present invention during the collision process of the acceleration module;

[0033] Figure 4 This is a top view of the collision test protection device of the present invention with the rocker arm in the closed state;

[0034] Figure 5 This is a front view of the collision test protection device of the present invention with the rocker arm in the closed state.

[0035] Legend:

[0036] 1. Left rocker arm; 2. Right rocker arm; 3. Elastic component; 4. Slide rod; 5. Buffer cylinder; 51. Buffer plate; 52. Piston rod; 6. Protective frame; 61. Base; 62. Support frame; 63. Crossbeam; 64. Rib plate; 7. Shift fork; 71. Left shift fork; 72. Right shift fork; 8. Rocker arm; 9. Acceleration module. Detailed Implementation

[0037] The embodiments of the present invention will be 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.

[0038] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0039] This application discloses a collision test protection device, referring to... Figure 1 It includes a protective frame 6, a buffer cylinder 5 installed inside the protective frame 6, a lever connected to the piston rod 52 of the buffer cylinder 5, and a rocker arm 8. The buffer cylinder 5 buffers the acceleration module 9, and the piston rod 52 retracts during buffering to move the lever, so that the lever moves the rocker arm 8 to the blocking position to block the rebounding acceleration module 9.

[0040] The protective frame 6 includes a base 61 and a support frame 62. The base 61 and the support beam form a cavity. The buffer cylinder 5 is fixedly mounted on the base 61 with bolts. There is one support frame 62 on each side of the buffer cylinder 5. The support frame 62 is vertically fixed to the base 61. Each support frame 62 includes two columns and one crossbeam 63. The columns are vertically fixed to the base 61, and the crossbeam 63 connects the two columns and is parallel to the base 61. An opening is formed at the end of the support frame 62 away from the base 61 for the acceleration module 9 to enter. To enhance the stability of the connection between the support frame 62 and the base 61, a stiffening plate 64 is provided between each column and the base 61. The stiffening plate 64 is a right-angled triangle, and the two right-angled sides of the stiffening plate 64 are welded and fixed to the column and the base plate, respectively.

[0041] Existing technologies use porous elastic materials such as sponge air cushions, PVC shock-absorbing plates, and rubber pads to absorb impact energy, utilizing the inherent physical properties of these materials. However, with the passage of time and increased use, it is foreseeable that the physical properties of these materials will change, resulting in a decrease in buffering effectiveness. A second method utilizes the compressibility of gas, filling the chamber with high-pressure nitrogen to form an air spring structure to absorb collision energy. However, this method uses high-pressure gas as a medium, posing safety risks such as explosions. In contrast, the buffer cylinder 5 of this application is a gas-liquid buffer cylinder 5 that uses low-pressure nitrogen and hydraulic oil as a medium. It achieves the dissipation and buffering of impact energy through the throttling effect of a throttling orifice, making this method safe and efficient.

[0042] Reference Figure 2 The piston rod 52 of the buffer cylinder 5 faces the opening, and a buffer plate 51 is fixedly connected to the end of the piston rod 52. The buffer plate 51 is positioned opposite the opening to receive the impact of the acceleration module 9 entering from the inlet. Two levers are welded and fixed on the buffer plate 51, one is a left lever and the other is a right lever. The left lever and the right lever move up and down as the piston rod 52 of the buffer cylinder 5 extends and retracts.

[0043] A sliding rod 4 connects the columns of the two support frames 62. The sliding rod 4 is parallel to the base 61, and a set of sliding rods 4 is provided on each side of the buffer cylinder 5. Each sliding rod 4 is provided with a rocker arm 8, one is a left rocker arm 1, and the other is a right rocker arm 2. The rocker arms 8 swing around the sliding rod 4 in a circumferential direction and slide along the length of the sliding rod 4. The two rocker arms 8 are symmetrically arranged about the axis of the piston rod 52 of the buffer cylinder 5. The rocker arm 8 includes a rotating sleeve sleeved on the sliding rod 4 and a drive section and an intercepting section connected to the rotating sleeve.

[0044] Reference Figure 2 and Figure 5By swinging the rocker arm 8 around the slide rod 4, the rocker arm 8 can switch between an open state and a closed state. In the open state, the drive section is located on the movement path of the lever, and the interception section is located outside the opening area. In the closed state, the interception section is located within the opening area. When the piston rod 52 of the buffer cylinder 5 is impacted and retracts, it can drive the lever to move downward, thereby moving the drive section of the rocker arm 8, so that the rocker arm 8 switches from the open state to the closed state.

[0045] Both slide bars 4 are equipped with elastic elements 3 and stops. The rocker arm 8 is located between the elastic elements 3 and the stops. The elastic element 3 is a spring. The force exerted by the elastic element 3 on the rocker arm 8 causes the two rocker arms 8 to tend to move closer to each other along the length of the slide bar 4. In the open state, the rocker arm 8 abuts against the stop under the action of the elastic element 3, so that the rocker arm 8 can remain stable and not shake, thus preventing the acceleration module 9 from colliding with the rocker arm 8 before entering the protective frame 6.

[0046] Reference Figure 3 and Figure 4 A connecting block is formed on the side of the intercepting segment away from the elastic element 3. A barb is formed on the side of the connecting block facing the slide rod 4. A wedge-shaped surface is provided on the connecting block, so that the width of the connecting block in the direction perpendicular to the intercepting segment gradually increases from the position away from the slide rod 4 to the position closer to the slide rod 4. During the process of the two rocker arms 8 switching from the open state to the closed state, the wedge-shaped surfaces of the two intercepting segments abut against each other and generate a component force along the slide rod 4, causing the two rocker arms 8 to move away from each other along the length direction of the slide rod 4. After reaching the closed state, the elastic element 3 locks the rocker arms 8 to slide along the slide rod 4, and the barbs of the intercepting segments interlock with each other, locking the rocker arms 8 to swing around the slide rod 4.

[0047] The length of the drive section and the angle between the drive section and the interception section are preset values. This ensures that when the rocker arm 8 is closed, the drive section of the rocker arm 8 is disengaged from the movement path of the lever. Thus, even if the lever continues to move with the piston rod 52 of the buffer cylinder 5, it will no longer exert force on the rocker arm. When the impact force of the acceleration module 9 is large, and the piston rod 52 of the buffer cylinder 5 retracts a large length, the rocker arm will disengage from the lever after reaching the closed state, reducing the impact force on the rocker arm and preventing damage due to excessive force. Both the drive section end and the lever end have smooth arc surfaces, making the transmission process smoother.

[0048] The interception section includes a first bend and a second bend, both set at obtuse angles. The first bend is connected to the drive section, and a wedge-shaped surface and a barb are provided on the second bend. In the closed state, the angles between the first and second bends and the force-bearing surface of the buffer plate 51 are both acute angles. In this way, after the acceleration module 9 collides and rebounds with the buffer plate 51, the impact force of the acceleration module 9 on the interception section will not act perpendicularly on the interception section, which can reduce the risk of damage to the interception section due to impact.

[0049] Reference Figure 5The distance between the slide bar 4 and the base 61 is less than the distance between the crossbeam 63 and the base 61. In the closed state, the distance between the engagement position of the intercepting section and the base 61 is greater than the distance between the crossbeam 63 and the base 61, so that the crossbeam 63 and the intercepting section can work together to intercept and improve the stability of the interception.

[0050] The implementation principle of the collision test protection device in this application embodiment is as follows: When the acceleration module 9 moves downward and does not collide with the protection device, the piston rod 52 of the buffer cylinder 5 is fully extended, and the left rocker arm 1 and the right rocker arm 2 open; when the acceleration module 9 moves downward and impacts the buffer cylinder 5 of the protection device, the collision energy is transferred to the buffer cylinder 5 for buffering and absorption. During the buffering process, the left fork 71, the right fork 72, the buffer plate 51, and the piston rod 52 will move downward. During the downward movement, the left fork 71 and the right fork 72 respectively actuate the left rocker arm 1 and the right rocker arm 2 to rotate around the slide rod 4, causing the left rocker arm 1 and the right rocker arm 2 to close; refer to Figure 4 and Figure 5 During the closing process, the tops of the left rocker arm 1 and the right rocker arm 2 come into contact. Because the tops of the left rocker arm 1 and the right rocker arm 2 are machined with wedge-shaped surfaces, the left rocker arm 1 compresses the spring and moves downward along the slide rod 4 during the contact process, while the right rocker arm 2 compresses the spring and moves upward along the slide rod 4 during the contact process. As the left rocker arm 1 and the right rocker arm 2 continue to close, they pass over the wedge-shaped surfaces machined at the top. Under the action of the spring force, the left rocker arm 1 moves upward along the slide rod 4, and the right rocker arm 2 moves downward along the slide rod 4, returning to the initial position of being close to the step surface. At the same time, the structure at the lower end of the wedge-shaped surface locks the left rocker arm 1 and the right rocker arm 2 together, preventing them from continuing to close or rebounding and opening. After the left rocker arm 1 and the right rocker arm 2 are locked together, the rebound channel of the acceleration module 9 is blocked. The frame, the left rocker arm 1, and the right rocker arm 2 form a relatively closed protective structure to prevent the acceleration module 9 from rebounding and causing damage to surrounding equipment and personnel.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A collision test protection device, characterized in that, include: The protective frame (6) has a cavity inside, and an opening communicating with the cavity is formed on one side of the protective frame (6); A buffer cylinder (5) is installed in the cavity of the protective frame (6). The piston rod (52) of the buffer cylinder (5) faces the opening, and a buffer plate (51) corresponding to the opening is provided on the piston rod (52) of the buffer cylinder (5). The lever is set on the buffer plate (51) and moves with the extension and retraction of the piston rod (52) of the buffer cylinder (5); The rocker arm (8) rotates in coordination with the protective frame (6). With the rotation center as the boundary, the end of the rocker arm (8) closer to the lever forms the driving section, and the end of the rocker arm (8) further away from the lever forms the intercepting section. By swinging the rocker arm (8) around the rotation center, the rocker arm (8) switches between the open and closed states. In the open state, the driving section is located on the moving path of the lever, and in the open state, the intercepting section is located outside the opening area. In the closed state, the intercepting section is located within the opening area to block the opening. The piston rod (52) of the buffer cylinder (5) is impacted and retracts, thereby driving the lever to move the drive section of the rocker arm (8), so that the rocker arm (8) switches from the open state to the closed state.

2. The collision test protection device according to claim 1, characterized in that: Multiple rocker arms (8) are arranged circumferentially around the opening, and the intercepting sections of the rocker arms (8) arranged opposite to each other are interlocked in the closed state.

3. The collision test protection device according to claim 2, characterized in that: The The protective frame (6) has a sliding rod (4) on each side of the opening. The sliding rod (4) and the piston rod (52) of the buffer cylinder (5) are arranged perpendicularly in space. The rocker arm (8) is set on the sliding rod (4) and the rocker arm (8) is arranged one-to-one with the sliding rod (4). The rocker arm (8) swings around the sliding rod (4) and slides along the length of the sliding rod (4). The sliding rod (4) is provided with an elastic element (3). The elastic element (3) is used to form an elastic pushing force when the two rocker arms (8) are engaged to prevent the two rocker arms (8) from loosening after being engaged. The intercepting section of the rocker arm (8) has a wedge-shaped surface and a barb. During the process of switching the two rocker arms (8) from the open state to the closed state, the wedge-shaped surfaces of the intercepting sections of the two rocker arms (8) abut against each other and generate a component force along the direction of the slide rod (4), causing the two rocker arms (8) to move away from each other along the length direction of the slide rod (4). When the two rocker arms (8) switch from the open state to the closed state, the elastic element (3) locks the rocker arm (8) to slide along the direction of the slide rod (4), and the barb of the intercepting section engages with each other, locking the rocker arm (8) to swing around the slide rod (4) in a circumferential direction.

4. The collision test protection device according to claim 3, characterized in that: The intercepting segment has a connecting block protruding outward on the side away from the elastic member (3). The hook portion is formed on the side of the connecting block facing the slide rod (4). The wedge-shaped surface is provided on the connecting block. The width of the connecting block in the direction perpendicular to the intercepting segment gradually increases from the position away from the slide rod (4) to the position closer to the slide rod (4).

5. The collision test protection device according to claim 3, characterized in that: The length of the drive section and the angle between the drive section and the interception section are preset values, so that when the rocker arm (8) is closed, the drive section of the rocker arm (8) is outside the movement path of the lever.

6. The collision test protection device according to claim 5, characterized in that: Both the drive section end and the lever end have smooth arc surfaces.

7. The collision test protection device according to claim 3, characterized in that: The interception section includes a first bend and a second bend with obtuse angles. The first bend is connected to the drive section. A wedge-shaped surface and a barb are provided on the second bend. In the closed state, the angles between the first bend and the second bend and the buffer plate (51) are both acute angles.

8. The collision test protection device according to claim 3, characterized in that: The slide bar (4) is provided with a stop block, and the rocker arm (8) in the open state abuts against the stop block under the action of the elastic element (3).

9. The collision test protection device according to claim 1, characterized in that: The protective frame (6) includes a base (61) and a support frame (62). The base (61) is used to install the buffer cylinder (5). The support frame (62) is vertically fixed on the base (61). The support frame (62) includes a column perpendicular to the base (61) and a crossbeam (63) parallel to the base (61). Two sets of support frames (62) are arranged in parallel. The buffer cylinder (5) is located between the two support frames (62). The two ends of the slide rod (4) are respectively connected to the column of the support frame (62) on the corresponding side. The distance between the slide rod (4) and the base (61) is less than the distance between the crossbeam (63) and the base (61). The distance between the engagement position of the closed interception section and the base (61) is greater than the distance between the crossbeam (63) and the base (61).

10. The collision test protection device according to claim 9, characterized in that: A stiffening plate (64) is provided between the column and the base (61).

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