Collision testing device

Abstract

This invention discloses a collision testing device, including a collision chamber and a power application mechanism. The collision chamber has a cavity for holding the object to be tested. The collision chamber includes a bottom wall, a front side wall, and a rear side wall. The bottom wall has multiple first rolling elements on the side facing the cavity, and the front and rear side walls each have multiple second rolling elements on the side facing the cavity. All the first and second rolling elements are rotatably connected to the collision chamber and are arranged facing the collision direction. The power output end of the power application mechanism is located within the cavity and is used to apply an initial force towards the collision direction to the object to be tested. By setting rolling elements on three sides of the collision chamber, the object to be tested is guided to collide, effectively reducing energy loss caused by friction during the object's movement. Simultaneously, the movement direction of the object can be stably maintained, ensuring a head-on collision between the two objects, thus better simulating the actual collision process.

Description

Technical Field

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

[0002] Graphite bricks are a crucial core structural material in high-temperature gas-cooled reactors, connected by keyways and other structural elements. Under dynamic loads such as vibration, these bricks can collide with each other. To ensure the reactor's safety under these conditions, the collision dynamics of the graphite brick structure need to be pre-tested and analyzed. During testing, the test system needs to be designed to restrict the direction of movement of the brick structure to ensure head-on collisions occur.

[0003] Common methods for collision testing include guiding brick structures to collide with each other using air-bearing guides. This involves using an air-bearing platform to support and guide the bricks, giving one brick an initial velocity to collide with another. For example... Figure 1 As shown, this method often requires machining the bottom of the brick into an inverted V-shape, altering the brick's structural properties. Furthermore, solid bricks typically have a large mass, necessitating stricter control over aerodynamic loads. Another method involves placing a wheeled cart beneath the brick and applying a pushing force to induce a collision on a linear guide rail. (See figure) Figure 2 As shown, this method requires a tight connection between the trolley and the bricks, and strict control over the trolley's direction of movement. The way they are fixed also alters the center of gravity of the individual brick structure. This method is suitable for tests such as car crash tests with integrated wheel modules. Another method involves setting one brick in the form of a pendulum, causing it to collide with another brick. For example... Figure 3 As shown, by adjusting the initial state of the impacting brick, the impacting brick and the brick being impacted collide at their lowest points. This test method requires strict control of the planar motion of the swing arm, making it difficult to guarantee a head-on collision between the bricks, and a secondary collision may occur after the initial impact.

[0004] Therefore, a device is needed that can be well applied to graphite brick collision testing so that the brick collision testing process is more in line with actual collisions. Summary of the Invention

[0005] In order to overcome the shortcomings and deficiencies of the prior art, the purpose of this invention is to provide a collision testing device to solve the problem that there is a large difference between the collision testing device and the actual collision in the prior art.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] The present invention provides a collision testing device, including a collision chamber and a power application mechanism. The collision chamber has a cavity for holding an object to be tested. The collision chamber includes a bottom wall, a front side wall, and a rear side wall. The bottom wall has a plurality of first rolling elements on the side facing the cavity. The front side wall and the rear side wall each have a plurality of second rolling elements on the side facing the cavity. The plurality of first rolling elements and the plurality of second rolling elements are rotatably connected to the collision chamber and are arranged facing the collision direction. The power output end of the power application mechanism is located in the cavity and is used to apply an initial power to the object to be tested in the direction of the collision.

[0008] Furthermore, the power application mechanism includes a conformal structural member, a push-pull arm, a drive mechanism, and a drive mechanism support frame. The conformal structural member is disposed in the receiving cavity, and the drive mechanism is mounted on the drive mechanism support frame. The drive mechanism is connected to the conformal structural member through the push-pull arm and drives the conformal structural member to move toward the collision direction. The conformal structural member matches the shape of the contact surfaces of the object to be tested.

[0009] Furthermore, the collision box includes a right side wall, which is connected to the right end of the bottom wall, the front side wall, and the rear side wall. The drive mechanism support frame is fixedly connected to the right side wall. The right side wall is provided with a through hole that cooperates with the push-pull arm. One end of the push-pull arm passes through the through hole and is connected to the conformal structure.

[0010] Furthermore, a linear bearing is provided inside the through hole, and the linear bearing is sleeved on the push-pull arm.

[0011] Furthermore, the drive mechanism includes an energy storage component, a first clutch component, a rack, and a drive gear. One end of the energy storage component abuts against the conformal structural component, and the other end of the energy storage component abuts against the right side wall. One end of the push-pull arm engages with the rack via the first clutch component. The first clutch component is used to control the engagement or disengagement of the push-pull arm and the rack. The rack is slidably connected to the drive mechanism support frame. The drive gear is fixedly connected to the drive mechanism support frame and can drive the rack to slide relative to the drive mechanism support frame in the collision direction.

[0012] Furthermore, the drive mechanism also includes a second clutch element, which is used to control the engagement or disengagement of the rack from the drive mechanism support frame.

[0013] Furthermore, a displacement sensor is provided on the right side wall, which is used to detect the position of the conformal structural member.

[0014] Furthermore, the collision box includes a left side panel that is detachably connected to the left end of the bottom wall, the front side wall, and the rear side wall.

[0015] Furthermore, the bottom wall, the front side wall, and the left end of the rear side wall are all provided with a slot that mates with the left side plate, and the left side plate is engaged in the slot.

[0016] Furthermore, the left end of the bottom wall is provided with a guide portion, which has a transition slope, and the inner sidewall of the bottom wall smoothly transitions to the outer sidewall of the bottom wall through the transition slope.

[0017] Furthermore, the collision testing device also includes a measuring mechanism, which includes a support frame and a camera. The camera is mounted on the support frame and located on top of the collision chamber. The camera is used to capture the collision process of the object under test.

[0018] The beneficial effects of this invention are as follows: by setting rolling elements on the three inner sides of the collision box, the test object is guided to collide, which can effectively reduce the energy loss caused by friction during the movement of the test object, and at the same time can stably maintain the movement direction of the test object, ensuring that the two test objects collide head-on; the power application mechanism can apply initial kinetic energy to the test object. After the test object obtains the initial kinetic energy, it separates from the power application mechanism and slides on the bottom wall according to inertia, which can better simulate the actual collision process. Attached Figure Description

[0019] Figure 1 This is one of the structural schematic diagrams of collision testing devices in the prior art;

[0020] Figure 2 This is the second schematic diagram of a collision testing device in the prior art;

[0021] Figure 3 This is the third schematic diagram of a collision testing device in the existing technology;

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the collision testing device in this invention;

[0023] Figure 5 This is a rear view schematic diagram of the collision testing device in this invention;

[0024] Figure 6 This is a schematic diagram of the cross-sectional structure of the collision testing device in this invention;

[0025] Figure 7 This is one of the top view structural schematic diagrams of the collision testing device in this invention;

[0026] Figure 8 This is the second top view of the collision testing device in this invention;

[0027] Figure 9 This is a schematic diagram of the disassembled structure of the collision testing device in this invention;

[0028] Figure 10 This is a schematic diagram of the circuit connection of the collision testing device in this invention.

[0029] In the figure: collision box 10, receiving cavity 101, bottom wall 11, first rolling element 111, guide part 112, transition slope 112a, front side wall 12, second rolling element 121, slot 122, rear side wall 13, right side wall 14, through hole 141, linear bearing 141a, displacement sensor 142, buffer block 143, left side plate 15, handle 151, buffer pad 152; power application mechanism 20, conformal structural element 21, push-pull arm 2 2. Drive mechanism 23, energy storage component 231, first clutch component 232, telescopic rod 232a, rack 233, drive gear 234, rocker arm 234a, second clutch component 235, drive mechanism support frame 24, support rod 241; measuring mechanism 30, support frame 31, support foot 311, crossbeam 312, mounting plate 313, camera 32; air pump 40, first switch 41, second switch 42; calculator 50; collision direction F. Detailed Implementation

[0030] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific implementation methods, structure, features, and effects of the collision testing device proposed according to the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments:

[0031] Figure 4 This is a three-dimensional structural diagram of the collision testing device in this invention. Figure 5 This is a rear-view structural schematic diagram of the collision testing device in this invention. Figure 6 This is a schematic diagram of the cross-sectional structure of the collision testing device in this invention. Figure 7 This is one of the top view structural schematic diagrams of the collision testing device in this invention. Figure 8 This is the second top view schematic diagram of the collision testing device in this invention. Figure 9 This is a schematic diagram of the disassembled structure of the collision testing device in this invention.

[0032] like Figures 4 to 9 As shown, the present invention provides a collision testing device, including a collision box 10 and a power application mechanism 20. The collision box 10 has a cavity 101 for placing a test object (e.g., a graphite brick). The collision box 10 includes a bottom wall 11, a front side wall 12, and a rear side wall 13. The bottom wall 11 has a plurality of first rolling elements 111 on the side facing the cavity 101. The front side wall 12 and the rear side wall 13 each have a plurality of second rolling elements 121 on the side facing the cavity 101. The plurality of first rolling elements 111 ( Figure 6The first and second rolling elements 121 are rotatably connected to the collision box 10 and are all arranged facing the collision direction F. The power output end of the power application mechanism 20 is located in the receiving cavity 101 and is used to apply an initial power to the object to be tested in the collision direction F. The collision box 10, as the main support for the system operation, is made of solid high-strength steel.

[0033] This invention provides rolling elements (first rolling element 111 and second rolling element 121) on the three inner sides (bottom wall 11, front side wall 12, and rear side wall 13) of the collision chamber 10, thereby guiding the test object to collide. This effectively reduces energy loss caused by friction during the movement of the test object and stably maintains the direction of movement of the test object, ensuring a head-on collision between the two test objects. The power application mechanism 20 can apply initial kinetic energy to the test object. After obtaining the initial kinetic energy, the test object separates from the power application mechanism 20 and slides on the bottom wall according to inertia, which can better simulate the actual collision process.

[0034] In this embodiment, both the first rolling element 111 and the second rolling element 121 are cylindrical structures. The first rolling element 111 can be a cast needle, which serves as the bottom bearing component of the object to be tested. It is made of high-strength bearing steel and formed through a corresponding heat treatment process. Each cast needle is perpendicular to the collision direction F and arranged parallel to it. Both ends of each cast needle are connected to the frame of the collision box 10 through small bearings. The second rolling element 121 can be a roller, which can be a hollow structure. Each roller is perpendicular to the collision direction F and arranged parallel to it. Both ends of each roller are connected to the frame of the collision box 10 through small bearings. Each bearing is embedded inside the frame of the collision box 10. During the processing, in order to ensure the flatness between the rollers, a row of flush bearing embedding grooves needs to be pre-cut on the frame of the collision box 10 through a precision machining process, and then the subsequent component assembly is completed in sequence. Of course, in other embodiments, the first rolling element 111 and the second rolling element 121 may also be replaced by balls, with the balls partially embedded in the bottom wall 11, the front side wall 12 and the rear side wall 13 of the collision box 10.

[0035] In this embodiment, the power application mechanism 20 includes a conformal structural member 21, a push-pull arm 22, and a drive mechanism 23. Figure 9The system includes a drive mechanism support frame 24, a conformal structural member 21 housed within the receiving cavity 101, and a drive mechanism 23 mounted on the drive mechanism support frame 24. The drive mechanism 23 connects to the conformal structural member 21 via a push-pull arm 22 and drives the conformal structural member 21 to move in the collision direction F. The conformal structural member 21 matches the shape of the contact surface between itself and the object under test. For example, the object under test can be L-shaped or Z-shaped, and the contact surface between the conformal structural member 21 and the object under test is also a corresponding L-shaped or Z-shaped structure, thus allowing the conformal structural member 21 to better contact the object under test. Preferably, to reduce energy loss, the conformal structural member 21 is made of aluminum, but it also needs to be strengthened through a certain heat treatment process. The conformal structural member 21 and the push-pull arm 22 are connected by screws, making it easy to replace conformal structural members 21 of different shapes to test objects of different shapes, thus having a wide range of applications. The push-pull arm 22 has a U-shaped structure, that is, two connecting shafts and a connecting block together form a U-shaped structure. Of course, in other embodiments, the power application mechanism 20 may also be a high-pressure gas acceleration device or an electromagnetic force acceleration device, that is, to provide initial kinetic energy to the object to be tested by high-pressure gas or magnetic force.

[0036] Furthermore, the collision box 10 includes a right side wall 14, which is connected to the right end of the bottom wall 11, the front side wall 12, and the rear side wall 13. The drive mechanism support frame 24 is fixedly connected to the right side wall 14. The right side wall 14 has a through hole 141 that mates with the push-pull arm 22. One end of the push-pull arm 22 passes through the through hole 141 and is connected to the conformal structure 21. A linear bearing (ball retainer) 141a is provided in the through hole 141. The linear bearing 141a is sleeved on the push-pull arm 22, thereby effectively reducing the friction and wear between the push-pull arm 22 and the through hole 141. Of course, in other embodiments, the collision box 10 may not have a right side wall 14, and the drive mechanism support frame 24 can be directly fixed to the ground. The drive mechanism support frame 24 has a support rod 241 to form a stable triangular structure, making the drive mechanism support frame 24 simpler and saving materials.

[0037] Furthermore, a displacement sensor 142 is provided on the right side wall 14. The displacement sensor 142 is used to monitor the position of the conformal structural member 21. The displacement sensor 142 is located on the inner side of the right side wall 14 (towards the receiving cavity 101). The displacement sensor 142 is used to monitor the position of the conformal structural member 21, thereby detecting the compression of the energy storage member 231. Of course, for test conditions where high precision is not required, measurement and control can also be carried out by setting a ruler or other means, so as to accurately give the test object an initial kinetic energy. A buffer block 143 is provided on the outer side of the right side wall 14 (the side away from the receiving cavity 101). Figure 4The buffer block 143 is made of rubber, which can effectively reduce the impact force and thus prevent the connecting block on the outside of the U-shaped push-pull arm 22 from colliding with the right side wall 14 and being damaged during the movement.

[0038] In this embodiment, the drive mechanism 23 includes an energy storage component 231, a first clutch component 232, a rack 233, and a drive gear 234. One end of the energy storage component 231 abuts against the conformal structural component 21, and the other end of the energy storage component 231 abuts against the right side wall 14. Preferably, the energy storage component 231 is a tension spring sleeved on the push-pull arm 22. Of course, the energy storage component 231 can also be two mutually repelling magnets, thereby compressing the distance between the two magnets to store energy. One end of the push-pull arm 22 engages with the rack 233 through the first clutch component 232. The first clutch component 232 is used to control the engagement or disengagement of the push-pull arm 22 and the rack 233. The rack 233 is slidably connected to the drive mechanism support frame 24. The drive gear 234 is fixedly connected to the drive mechanism support frame 24 and can drive the rack 233 to slide relative to the drive mechanism support frame 24 in the collision direction F. The drive mechanism support frame 24 has a groove on its top surface for mounting a rack 233. A drive gear 234 is mounted on the top surface of the drive mechanism support frame 24 and meshes with the rack 233. The drive gear 234 also has a rocker arm 234a, allowing manual rotation of the drive gear 234 and sliding of the rack 233, which in turn moves the push-pull arm 22 and applies pressure to the energy storage component 231. Energy is stored by compressing the energy storage component 231, and then the constraint is released to generate load excitation. The compression amount is measured and controlled by the displacement sensor 142. The preset energy value can be estimated by using the equivalent elastic potential energy and kinetic energy. For tests with different load requirements (different mass specimens, different movement speed requirements), the energy storage component 231 of corresponding strength can be replaced. Alternatively, in other embodiments, the drive gear 234 can be connected to a motor, thereby driving the drive gear 234 to rotate. Or, the rack 23, drive gear 234, and displacement sensor 142 can be replaced by a single servo motor, simplifying the structure. Similarly, air pumps, cylinders, and electric cylinders can be used as alternatives.

[0039] Furthermore, the drive mechanism 23 also includes a second clutch 235, which is used to control the engagement or disengagement of the rack 233 with the drive mechanism support frame 24. In this embodiment, the first clutch 232 is fixed to the connecting block of the U-shaped push-pull arm 22, and the second clutch 235 is fixed to the drive mechanism support frame 24. Preferably, both the first clutch 232 and the second clutch 235 are made of cylinders, and both the first clutch 232 and the second clutch 235 are provided with a telescopic rod 232a. Figure 6The telescopic rod 232a has a wedge-shaped structure at one end facing the rack 233. The cylinder drives the telescopic rod 232a to extend and retract, thereby causing the telescopic rod 232a to engage or disengage with the rack 233. Of course, in its embodiment, the first clutch 232 and the second clutch 235 can also be fixed to the rack 233, and the connecting block of the U-shaped push-pull arm 22 needs to be provided with a locking groove, and the top surface of the drive mechanism support frame 24 needs to be provided with multiple locking grooves.

[0040] In this embodiment, the collision testing device also includes an air pump 40. Figure 10 The first clutch 232 and the second clutch 235 are both connected to the air pump 40, and a first switch 41 is provided between the first clutch 232 and the air pump 40. Figure 10 A second switch 42 is provided between the second clutch 235 and the air pump 40. Figure 10 In use, the first switch 41 must first be closed (i.e., the telescopic rod 232a of the first clutch 232 is lowered and locked to the rack 233) and the second switch 42 must be opened (i.e., the telescopic rod 232a of the second clutch 235 is raised and disengaged from the rack 233). Then, the rack 233 is moved away from the collision box 10 by the rocker arm 234a, thereby driving the push-pull arm 22 to move together. Thus, the energy storage component 231 begins to compress and store energy until it moves to the preset displacement. Then, the second switch 42 is opened. The circuit is closed (i.e., the telescopic rod 232a of the second clutch 235 descends and engages with the rack 233). After the test object is placed, the first switch 41 is opened (i.e., the telescopic rod 232a of the first clutch 232 rises and disengages from the rack 233). Simultaneously, the push-pull arm 22 is excited by the release of the elastic potential energy of the energy storage component 231, pushing the test object to begin moving along the collision direction F and colliding with another test object on the path at a certain speed. By setting the first switch 41 and the second switch 42, the testing process can be controlled within a safe area, increasing safety.

[0041] In this embodiment, the impact chamber 10 includes a left side plate 15, which is detachably connected to the left end of the bottom wall 11, the front side wall 12, and the rear side wall 13. This allows the test object to be placed into the receiving cavity 101 from the left side of the impact chamber 10, eliminating the need to place it from the top of the impact chamber 10, thus facilitating user operation. Specifically, the left ends of the bottom wall 11, the front side wall 12, and the rear side wall 13 are each provided with a slot 122 that mates with the left side plate 15, and the left side plate 15 is secured within the slot 122. The top of the left side plate 15 is provided with a handle 151, facilitating the insertion and removal of the left side plate 15 from the slot 122. After being inserted into the slot 122, the left side plate 15 can be used to block the impacted test object. A buffer pad 152 is provided on the side of the left side plate 15 facing the receiving cavity 101. Figure 9The buffer pad 152 can be made of rubber to reduce the impact of the test object on the left side plate 15 and reduce damage caused by unnecessary collisions.

[0042] Furthermore, a guide portion 112 is provided at the left end of the bottom wall 11, and the guide portion 112 is provided with a transition slope 112a. Figure 6 The inner sidewall of the bottom wall 11 smoothly transitions to the outer sidewall of the bottom wall 11 via the transition ramp 112a. When the left side plate 15 is removed, the heavier test object can be dragged along the transition ramp 112a into the receiving cavity 101, avoiding the more difficult handling and installation.

[0043] In this embodiment, the top of the collision chamber 10 does not need to be provided with a top wall; that is, the top of the collision chamber 10 is an opening, which also facilitates the camera 32 to capture the collision process of the object under test. The bottom wall 11, the front side wall 12, and the rear side wall 13 are made of metal plates to prevent dangerous phenomena such as debris splashing. Of course, in other embodiments, the collision chamber 10 may also be provided with a top wall, but the top wall must be made of a transparent material, such as glass or PV.

[0044] In this embodiment, the collision testing device further includes a measuring mechanism 30, which includes a support frame 31 and a camera 32. The camera 32 is mounted on the support frame 31 and located on top of the collision chamber 10. The camera 32 is used to capture the collision process of the object under test. Alternatively, the support frame 31 can be connected to the collision chamber 10. The camera 32 is a high-speed camera that captures high-frequency images of the object under test vertically downwards during the collision test. Image sequence analysis algorithms can be used to obtain the motion displacement information of each object under test during the process, thereby calculating the velocity, acceleration, and other information of the object under test. In other embodiments, the measuring mechanism 30 can be additionally provided and does not need to be integrated with the collision chamber 10 and the power application mechanism 20. The camera 32 can also be replaced by other sensors, such as an accelerometer, velocity sensor, and position sensor.

[0045] Furthermore, the support frame 31 includes support legs 311, a crossbeam 312, and a mounting plate 313. Figure 6 Two crossbeams 312 spanning above the collision chamber 10 are adjustable up and down via vertical support legs 311 and secured with corner bolts. The bottom of each support leg 311 has a through hole, allowing it to be locked to the ground with anchor bolts to ensure structural stability. A mounting plate 313 is fixed to the two crossbeams 312 and positioned above the collision chamber 10. The mounting plate 313 has clearance holes corresponding to the lens of the camera 32. The camera 32 is fixed to the mounting plate 313 and captures images of the test object vertically downwards through these clearance holes.

[0046] In this embodiment, as Figure 10 As shown, the collision testing device also includes a calculator 50, in which the camera 32 and the air pump 40 are electrically connected to the calculator 50, thereby controlling the extension and retraction of the first clutch 232 and the second clutch 235 by controlling the first switch 41 and the second switch 42. The calculator 50 can calculate information such as velocity and acceleration based on the image from the camera 32, thereby calculating and analyzing parameters such as energy loss and coefficient of restitution. As shown in Equation 1 below, the coefficient of restitution (e) is the ratio of the relative velocities of the two structural specimens before and after the collision, where v1 and v2 are the velocities of the two objects when they come into contact, and v1' and v2' are the velocities of the two objects after the collision ends.

[0047]

[0048] In this document, the directional terms such as up, down, left, right, front, and back are defined according to the position of the structures in the accompanying drawings and the relative positions of the structures, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second," etc., used herein are only used for distinction in name and are not used to limit the number or order.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content without departing from the scope of the technical solution of the present invention, which are equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A collision testing device, characterized in that, The device includes a collision box (10) and a power application mechanism (20). The collision box (10) has a cavity (101) for placing the object to be tested. The collision box (10) includes a bottom wall (11), a front side wall (12), and a rear side wall (13). The bottom wall (11) has a plurality of first rolling elements (111) on the side facing the cavity (101). The front side wall (12) and the rear side wall (13) each have a plurality of second rolling elements (121) on the side facing the cavity (101). The plurality of first rolling elements (111) and the plurality of second rolling elements (121) are rotatably connected to the collision box (10) and are arranged facing the collision direction (F). The power output end of the power application mechanism (20) is located in the cavity (101) and is used to apply an initial power to the object to be tested in the direction of the collision (F).

2. The collision testing device according to claim 1, characterized in that, The power application mechanism (20) includes a conformal structural member (21), a push-pull arm (22), a drive mechanism (23), and a drive mechanism support frame (24). The conformal structural member (21) is disposed in the receiving cavity (101). The drive mechanism (23) is mounted on the drive mechanism support frame (24). The drive mechanism (23) is connected to the conformal structural member (21) through the push-pull arm (22) and drives the conformal structural member (21) to move toward the collision direction (F). The conformal structural member (21) matches the shape of the contact surfaces of the object to be tested.

3. The collision testing apparatus according to claim 2, characterized in that, The collision box (10) includes a right side wall (14), which is connected to the right end of the bottom wall (11), the front side wall (12) and the rear side wall (13). The drive mechanism support frame (24) is fixedly connected to the right side wall (14). The right side wall (14) is provided with a through hole (141) that cooperates with the push-pull arm (22). One end of the push-pull arm (22) passes through the through hole (141) and is connected to the conformal structure (21).

4. The collision testing apparatus according to claim 3, characterized in that, A linear bearing (141a) is provided inside the through hole (141), and the linear bearing (141a) is sleeved on the push-pull arm (22).

5. The collision testing apparatus according to claim 3, characterized in that, The drive mechanism (23) includes an energy storage component (231), a first clutch component (232), a rack (233), and a drive gear (234). One end of the energy storage component (231) abuts against the conformal structural component (21), and the other end of the energy storage component (231) abuts against the right side wall (14). One end of the push-pull arm (22) engages with the rack (233) through the first clutch component (232). The first clutch component (232) is used to control the engagement or disengagement of the push-pull arm (22) and the rack (233). The rack (233) is slidably connected to the drive mechanism support frame (24). The drive gear (234) is fixedly connected to the drive mechanism support frame (24) and can drive the rack (233) to slide relative to the drive mechanism support frame (24) in the collision direction (F).

6. The collision testing apparatus according to claim 5, characterized in that, The drive mechanism (23) also includes a second clutch (235) for controlling the engagement or disengagement of the rack (233) from the drive mechanism support frame (24).

7. The collision testing apparatus according to claim 5, characterized in that, A displacement sensor (142) is provided on the right side wall (14) for detecting the position of the conformal structural member (21) movement.

8. The collision testing apparatus according to claim 1, characterized in that, The collision box (10) includes a left side plate (15) which is detachably connected to the left end of the bottom wall (11), the front side wall (12) and the rear side wall (13).

9. The collision testing apparatus according to claim 8, characterized in that, The left ends of the bottom wall (11), the front side wall (12) and the rear side wall (13) are all provided with slots (122) that cooperate with the left side plate (15), and the left side plate (15) is engaged in the slots (122).

10. The collision testing apparatus according to claim 1, characterized in that, The left end of the bottom wall (11) is provided with a guide portion (112), and the guide portion (112) is provided with a transition slope (112a). The inner side wall of the bottom wall (11) smoothly transitions to the outer side wall of the bottom wall (11) through the transition slope (112a).

11. The collision testing apparatus according to any one of claims 1-10, characterized in that, The collision testing device also includes a measuring mechanism (30), which includes a support frame (31) and a camera (32). The camera (32) is mounted on the support frame (31) and located on the top of the collision box (10). The camera (32) is used to capture the collision process of the object to be tested.

Images