Automobile door lock safety performance testing device for automobile crash test

Abstract

The invention relates to the technical field of automobile testing, in particular to an automobile door lock safety performance testing device for an automobile crash test, which comprises a bottom frame and a sliding block, and further comprises a supporting column, an automobile door mounting assembly, a limiting frame, an air bag assembly, an impact assembly, an electromagnetic accelerator and an inductive switch, the vehicle door mounting assemblies are slidably mounted on the inner sides of the supporting columns, the two limiting frames are symmetrically mounted on the two sides of the bottom frame, the air bag assemblies are mounted on the surfaces of the limiting frames, and the ends of the air bag assemblies extend to the two vehicle door mounting assemblies close to the sides of the limiting frames correspondingly. According to the invention, through a mode of correspondingly adjusting the pressure intensity of the corresponding position in the air bag assembly in the automobile collision test process, the problems that the parts of the test device for installing the hinge and the door knob buckle are easy to deform due to impact and the subsequent test operation is influenced are solved; and the problem that single collision data cannot be accurately acquired due to secondary collision between the impact structure and the vehicle door after collision is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle testing, and in particular to a safety performance testing device for vehicle door locks used in vehicle collision tests. Background Art

[0002] Vehicle collision tests are important testing means in vehicle safety research and development. By simulating various collision scenarios that may occur during actual vehicle driving, the safety performance of the vehicle is evaluated. In vehicle collision tests, the safety performance of the vehicle door lock is one of the items. Its main purpose is to evaluate the safety of the door lock during vehicle collision, ensure that the door lock will not accidentally open during the collision, thereby reducing the risk of occupant injury, and after a collision occurs, the door lock should be able to be normally unlocked so that the occupants can escape smoothly. Through testing, it can be verified whether the door lock can be normally opened and closed after a collision, ensuring the effectiveness of the emergency escape function.

[0003] Since the vehicle door lock is located at the edge of the door, considering the cost of vehicle collision tests, when conducting a collision test on the safety performance of the vehicle door lock, it is not necessary to conduct a full vehicle collision test like other tests. Usually, the vehicle door lock is installed on the door, and then the door is installed on the test stand. A high-speed moving object impacts the door at different positions and angles, and it is observed whether the door opens during the impact and whether the door can be opened after the impact.

[0004] In the prior art, the door is mostly installed on the safety performance testing device for vehicle door locks through hinges and door nose buckles. Since there are differences in the shapes and sizes of vehicle doors of different models, and there are also differences between the front and rear doors of the same vehicle, the parts of the safety performance testing device for vehicle door locks used to fix the hinges and door nose buckles need to be flexibly adjustable. This causes the parts of the safety performance testing device for vehicle door locks where the hinges and door nose buckles are installed to be easily deformed when the door is subjected to a major impact, thereby affecting the subsequent installation limit of the door, resulting in high testing costs for vehicle door locks and causing adverse interference to the testing efficiency; in addition, when the impact object moves at high speed towards the safety performance testing device for vehicle door locks, under the action of inertia, after the impact structure driving the object to move at high speed collides with the door, it continuously moves back and forth and collides with the door multiple times, thereby causing the safety performance testing device for vehicle door locks to be unable to accurately collect single collision data.

[0005] Therefore, a safety performance testing device for vehicle door locks used in vehicle collision tests is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a door lock safety performance testing device for automobile collision tests. During the process of the impact component moving rapidly towards the door side driven by an electromagnetic accelerator, the impact component squeezes the airbag component, causing the airbag at one end of the airbag component located inside the door mounting component to rise. As a result, the contact area between the door mounting component and the pillar is increased, thereby improving the stability between the door mounting component and the pillar. In addition, after the impact component collides with the door, the pressure at the end of the airbag component near the limiting frame is increased to prevent the impact component from colliding with the door multiple times. This solves the problems that the hinge and door nose buckle parts of the testing device are prone to deformation due to impact, affecting subsequent testing operations, and that the impact structure collides with the door a second time after the collision, making it impossible to accurately collect single collision data. It has the effect of improving the connection stability between the door mounting component and the pillar during automobile collision tests on the premise of ensuring the door mounting efficiency before the experiment, thereby avoiding the deformation of the door mounting component after testing and affecting subsequent testing. At the same time, it can also limit the impact component from the position near the end of the limiting frame, preventing the impact component from colliding with the door multiple times and resulting in the inability to collect single collision data.

[0007] To achieve the above object, the present invention provides the following technical solutions: A door lock safety performance testing device for automobile collision tests includes a chassis, a slider, and also includes a pillar, a door mounting component, a limiting frame, an airbag component, an impact component, an electromagnetic accelerator, and an induction switch. The pillar is correspondingly installed on the top of the slider, the door mounting component is slidably installed inside the pillar, two limiting frames are symmetrically installed on both sides of the chassis, the airbag component is installed on the surface of the limiting frame, and the ends of the airbag component respectively extend to two door mounting components on one side close to the limiting frame. Two impact components are respectively symmetrically installed in the two limiting frames, the electromagnetic accelerator is installed at the end of the limiting frame, and the induction switch is embedded on the surface of the limiting frame. When the power of the electromagnetic accelerator is turned on, the impact component moves rapidly towards the door mounting component. When the impact component moves, it squeezes the airbag component, and at the same time, the airbag component exerts pressure on the door mounting component, increasing the contact area between the door mounting component and the pillar. When the impact component passes through the induction switch, the airbag component exerts resistance on the impact component.

[0008] Preferably, through holes are evenly distributed between the two sides of the pillar, and a through rod passing through the door mounting component is inserted into the through holes. Tooth grooves symmetrically distributed with respect to the through holes are provided on the inner wall of the pillar.

[0009] Preferably, the door mounting assembly includes an adjusting block, a longitudinal chute, a limiting rod, and a reinforcing block. The adjusting block is slidably disposed within the support column, and the adjusting block is provided with a round hole adapted to the through rod. A hinge or a door nose buckle for mounting the door is installed at the end of the adjusting block. Two longitudinal chutes are symmetrically opened at the top of the adjusting block. Two reinforcing blocks are symmetrically arranged and are respectively slidably disposed within the two longitudinal chutes. The limiting rod is installed within the longitudinal chute and is slidably connected to the reinforcing block. A spring abutting between the adjusting block and the reinforcing block is sleeved on the outer periphery of the limiting rod.

[0010] Preferably, the cross-section of the reinforcing block is configured as an inverted L shape, and a toothed protrusion is integrally formed on one side of the reinforcing block close to the support column. The toothed protrusion is adapted to the tooth groove.

[0011] Preferably, the airbag assembly includes a main airbag, an end sealing seat, a solenoid valve, an air tube, and an auxiliary airbag. The main airbag is fitted and installed within the limiting frame. The end sealing seat is fitted and installed at the end of the main airbag. The solenoid valve is installed at the end of the main airbag and is in contact with the side wall of the limiting frame. Both of the two air tubes are connected to the solenoid valve. The auxiliary airbag is installed on the surface of the adjusting block and is located between the two reinforcing blocks. The end of the auxiliary airbag is connected to the air tube.

[0012] Preferably, the main airbag is configured as a flat column, and the end sealing seat is located on the side of the main airbag away from the chassis.

[0013] Preferably, the impact assembly includes a limiting block, a permanent magnet, and an impact rod. The limiting block is slidably disposed within the limiting frame. The permanent magnet and the impact rod are both installed on the surface of the limiting block, and the permanent magnet is located on the side of the impact rod close to the electromagnetic accelerator.

[0014] Preferably, a roller is rotatably installed at the bottom of the limiting block, and the roller presses the main airbag when the limiting block moves.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When testing the safety performance of the car door lock in a car crash test, due to the difference in the size of the car door, the position of the adjusting block can be changed. It only needs to pull out the through rod, move the adjusting block to the appropriate height, and then pass the through rod through the adjusting block. After the experiment starts, the impact component presses on the airbag component, increasing the pressure at one end of the airbag component located between the reinforcement blocks. The side airbag expands and pushes the reinforcement block into contact with the support column, effectively improving the structural stability between the car door mounting component and the support column, avoiding the deformation of the car door mounting component in the crash test and affecting the subsequent test, effectively ensuring the test efficiency of the safety performance of the car door lock in the car crash test, and also stabilizing the control of the test cost. In addition, after the impact component impacts the car door at a high speed, the internal pressure near the solenoid valve in the airbag component increases, which can effectively prevent the impact rod from colliding with the car door multiple times, facilitating the accurate acquisition of single collision data in the car crash test, and thus improving the accuracy of the safety performance test of the car door lock.

[0016] 2. By setting the support column and the car door mounting component, when testing car doors of different sizes and shapes, it only needs to pull out the through rod to change the relative position between the adjusting block and the support column, then pass the through rod through the adjusting block, and horizontally change the position of the support column, which is beneficial to quickly install the car door on the support column, and thus beneficial to improving the test efficiency of the safety performance of the car door lock.

[0017] 3. By setting the airbag component, the impact component and the induction switch, when the impact rod moves horizontally along the limit frame to a specific position, the induction switch detects the passing of the impact rod and closes the solenoid valve. At this time, when the impact component continues to move, the roller squeezes the main airbag, increasing the air pressure on the side of the main airbag close to the solenoid valve. After the impact rod collides with the car door, a large amount of kinetic energy is lost. When the impact rod rebounds and moves towards the car door side again, under the action of the main airbag with a large end pressure, the secondary movement stroke of the impact rod can be limited, thus avoiding the secondary or multiple collisions between the impact rod and the car door, ensuring that the data of the car door lock in a single car crash test can be collected singly, and thus effectively improving the test accuracy of the safety performance of the car door lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the airbag component of the present invention; Figure 3 is the structural schematic diagram of the support column of the present invention; Figure 4 is the structural schematic diagram of the impact component of the present invention; Figure 5 is the structural schematic diagram of the main airbag and the end sealing seat of the present invention; Figure 6 is the structural schematic diagram of the car door mounting component of the present invention; Figure 7 It is a schematic diagram of the structure of the adjustment block of the present invention.

[0019] In the figure: 1. chassis; 2. slider; 3. pillar; 31. through hole; 32. through rod; 33. tooth groove; 4. door mounting assembly; 41. adjustment block; 42. longitudinal slide groove; 43. limit rod; 44. reinforcement block; 441. tooth-shaped protrusion; 5. limit frame; 6. airbag assembly; 61. main airbag; 62. end sealing seat; 63. solenoid valve; 64. air pipe; 65. auxiliary airbag; 7. impact assembly; 71. limit block; 711. roller; 72. permanent magnet; 73. impact rod; 8. electromagnetic accelerator; 9. induction switch. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figures 1 to 7 The present invention provides a door lock safety performance testing device for automobile collision test, and the technical scheme is as follows: Reference Figure 1 , a vehicle door lock safety performance testing device for automobile collision test, comprising a base frame 1, a slider 2, the base frame 1 is shaped like a Chinese character "口" when viewed from above, and a parallel straight groove is opened on its surface, and two sliders 2 are limitedly slid in each straight groove, and also comprises a pillar 3, a door mounting assembly 4, a limit frame 5, an airbag assembly 6, an impact assembly 7, an electromagnetic accelerator 8 and an induction switch 9, the pillar 3 is correspondingly mounted on the top of the slider 2, the number of the pillars 3 is four, and they are respectively mounted on the top of four sliders 2, when installing doors of different sizes, the pillar 3 is firstly moved to adjust the spacing of the pillars 3 to a suitable size, the door mounting assembly 4 is slidably mounted on the inner side of the pillar 3, the two door mounting assemblies 4 located above the same straight groove are respectively used to fix the door hinge and the door nose buckle, the two limit frames 5 are symmetrically mounted on both sides of the base frame 1, the airbag assembly 6 is mounted on the surface of the limit frame 5, and the ends of the airbag assembly 6 respectively extend to the two door mounting assemblies 4 close to one side of the limit frame 5, and the two door mounting assemblies 4 are located above the same straight groove, combined with Figure 1It can be seen that the number of the limiting frames 5 and the airbag assemblies 6 is both two, while the number of the door mounting assemblies 4 is four; the two impact assemblies 7 are symmetrically mounted in the two limiting frames 5 respectively, and the impact assembly 7 is in limiting sliding connection with the limiting frame 5. Limiting sliding grooves are provided on both sides of the limiting frame 5 to limit the moving track of the impact assembly 7, so that the impact assembly 7 can only move horizontally along the inner wall of the limiting frame 5. The electromagnetic accelerator 8 is mounted at the end of the limiting frame 5, and the electromagnetic accelerator 8 is an electromagnet corresponding to the size of the impact assembly 7. The induction switch 9 is embedded on the surface of the limiting frame 5. The induction switch 9 is located on the surface of the limiting frame 5 close to the chassis 1, and the induction switch 9 is connected to the airbag assembly 6. When the control state of the induction switch 9 is switched, the internal space partition of the airbag assembly 6 is changed; when the electromagnetic accelerator 8 is powered on, the impact assembly 7 moves at high speed towards the door mounting assembly 4. When the impact assembly 7 moves, it squeezes the airbag assembly 6, and at the same time the airbag assembly 6 presses on the door mounting assembly 4 and increases the contact area between the door mounting assembly 4 and the pillar 3, thereby effectively improving the structural stability between the door mounting assembly 4 and the pillar 3 in the vehicle collision test, effectively preventing the door mounting assembly 4 from deforming when being impacted, ensuring the continuous progress of the subsequent door lock safety performance test, effectively reducing the test cost, and greatly improving the efficiency of the door lock safety performance test. When the impact assembly 7 passes through the induction switch 9, the airbag assembly 6 applies resistance to the impact assembly 7, which helps to avoid secondary or multiple collisions between the impact assembly 7 and the door, ensuring that single data can be accurately collected during the door lock safety performance test, and thus improving the accuracy of the door lock safety performance test.

[0022] Referring to Figure 3 , as a specific embodiment of the present invention, specifically, through holes 31 are provided at equal intervals between the two sides of the pillar 3, and a through rod 32 passing through the door mounting assembly 4 is inserted into the through holes 31. Tooth grooves 33 symmetrically distributed with respect to the through holes 31 are provided on the inner wall of the pillar 3. The distance between adjacent through holes 31 is an integer multiple of the distance between adjacent tooth grooves 33. When installing doors of different sizes on the door mounting assembly 4, pull out the through rod 32 and adjust it to the appropriate height, and then insert the through rod 32 through the door mounting assembly 4, and then horizontally adjust the horizontal position of the pillar 3.

[0023] Referring to Figure 1 、 Figure 6 and Figure 7, as a specific implementation manner of the present invention, specifically, the door mounting assembly 4 includes an adjusting block 41, a longitudinal sliding groove 42, a limiting rod 43 and a reinforcing block 44. The adjusting block 41 is slidably arranged in the pillar 3. The adjusting block 41 can move vertically along the inner wall of the pillar 3, and a round hole adapted to the through rod 32 is provided in the adjusting block 41. After the adjusting block 41 moves to a suitable height, the through rod 32 is passed through the adjusting block 41 to limit the adjusting block 41 in the pillar 3. At this time, the structural stability between the adjusting block 41 and the pillar 3 is relatively low. A hinge or a door nose buckle for installing the door is installed at the end of the adjusting block 41. Two longitudinal sliding grooves 42 are symmetrically provided at the top of the adjusting block 41. Two reinforcing blocks 44 are symmetrically arranged and respectively slidably arranged in the two longitudinal sliding grooves 42. The limiting rod 43 is installed in the longitudinal sliding groove 42, and the limiting rod 43 is slidably connected with the reinforcing block 44. A spring abutting between the adjusting block 41 and the reinforcing block 44 is sleeved on the outer periphery of the limiting rod 43. When the vehicle collision test starts, the impact assembly 7 moves towards the side of the door installed at the end of the adjusting block 41. The impact assembly 7 presses the airbag assembly 6, so that one end of the airbag assembly 6 located between the reinforcing blocks 44 expands, and the reinforcing block 44 is pushed towards the pillar 3 side to make the reinforcing block 44 fit with the pillar 3. Thereby, the structural stability between the door mounting assembly 4 and the pillar 3 in the vehicle collision test is improved, the adjusting block 41 is prevented from being easily deformed, and after the test is completed, the reinforcing block 44 can be reset by using the spring, so that when testing doors of different sizes next time, it is convenient to change the position of the adjusting block 41, effectively ensuring the efficiency of the door lock safety performance test.

[0024] Refer to Figure 3 and Figure 7 , as a specific implementation manner of the present invention, specifically, the cross-sectional structure of the reinforcing block 44 is an inverted L shape, and a toothed protrusion 441 is integrally formed on the side of the reinforcing block 44 close to the pillar 3. The toothed protrusion 441 is adapted to the tooth groove 33. When the reinforcing block 44 moves towards the pillar 3 side, the toothed protrusion 441 fits with the tooth groove 33, thereby effectively increasing the contact area between the reinforcing block 44 and the pillar 3 and greatly improving the stability between the reinforcing block 44 and the pillar 3 in the vehicle collision test.

[0025] Refer to Figure 2 and Figure 5, as a specific embodiment of the present invention, specifically, the airbag assembly 6 includes a main airbag 61, an end sealing seat 62, a solenoid valve 63, an air pipe 64, and a secondary airbag 65. The main airbag 61 is fitted and installed in the limiting frame 5, and the bottom of the main airbag 61 is adhesively fixed to the inner bottom surface of the limiting frame 5. The end sealing seat 62 is fitted and installed at the end of the main airbag 61. The solenoid valve 63 is installed at the end of the main airbag 61 and is in contact with the side wall of the limiting frame 5. Both air pipes 64 are connected to the solenoid valve 63. The secondary airbag 65 is installed on the surface of the adjusting block 41 and is located between the two reinforcing blocks 44. The end of the secondary airbag 65 is connected to the air pipe 64. The air pipe 64 is a high-pressure-resistant threaded metal pipe that will not deform when the internal pressure changes. After the induction switch 9 turns on the power supply of the solenoid valve 63, the solenoid valve 63 is in a closed state. At this time, the main airbag 61 and the secondary airbag 65 are in a non-communicating state. When the roller 711 continues to squeeze the main airbag 61, the pressure at one end of the main airbag 61 close to the solenoid valve 63 increases. Then, the movement trajectory of the limiting block 71 is limited by the main airbag 61, avoiding secondary or multiple collisions between the impact rod 73 and the car door.

[0026] Referring to Figure 5 , as a specific embodiment of the present invention, specifically, the main airbag 61 is configured as a flat columnar shape. The end sealing seat 62 is located on the side of the main airbag 61 away from the chassis 1. The flat columnar main airbag 61 is convenient for squeezing when the roller 711 moves, thereby changing the internal pressure of the main airbag 61 and the secondary airbag 65.

[0027] Referring to Figure 4, as a specific embodiment of the present invention, specifically, the impact assembly 7 includes a limit block 71, a permanent magnet 72, and an impact rod 73. The limit block 71 is slidably disposed within the limit frame 5. Both the permanent magnet 72 and the impact rod 73 are mounted on the surface of the limit block 71, and the permanent magnet 72 is located on the side of the impact rod 73 close to the electromagnetic accelerator 8. When the power supply of the electromagnetic accelerator 8 is turned on, the same magnetic property as that of the permanent magnet 72 is generated on the side of the electromagnetic accelerator 8 close to the permanent magnet 72, thereby driving the permanent magnet 72 to move at high speed along the limit frame 5 towards the chassis 1 side together with the limit block 71. A roller 711 is rotatably mounted at the bottom of the limit block 71. When the roller 711 moves with the limit block 71, it presses the main airbag 61. When the roller 711 presses the main airbag 61 and the solenoid valve 63 is not in the closed state, the internal pressure of the auxiliary airbag 65 continuously increases, and then the auxiliary airbag 65 expands and pushes the reinforcement block 44 towards the support column 3 side, so that the tooth-shaped protrusion 441 of the reinforcement block 44 fits with the tooth groove 33 of the support column 3. When the solenoid valve 63 is in the closed state, the internal pressure on the side of the main airbag 61 close to the solenoid valve 63 increases. Then, after the impact rod 73 collides with the car door once, the subsequent rebound movement of the impact rod 73 is affected by the end of the main airbag 61 with increased pressure, thereby restricting the impact rod 73 from continuing to contact and collide with the car door. The height change difference of the main airbag 61 after being pressed is equal to the diameter value of the roller 711.

[0028] Working principle: Before the vehicle collision test, first adjust the distance between the support columns 3 and the vertical height of the adjusting block 41 inside the support columns 3. Subsequently, install the car door on the hinge and the door nose buckle at the end of the adjusting block 41. During the experiment, turn on the power supply of the electromagnetic accelerator 8. The same magnetic property as that of the permanent magnet 72 is generated on the side of the electromagnetic accelerator 8 close to the permanent magnet 72, thereby driving the impact assembly 7 to move at high speed towards the car door side. During the movement of the impact assembly 7, the airbag assembly 6 below is continuously pressed. The pressure at the end between the reinforcement blocks 44 increases and expands and deforms, pushing the reinforcement block 44 to move horizontally and contact the support column 3. The tooth-shaped protrusion 441 fits with the tooth groove 33 to improve the structural stability between the reinforcement block 44 and the support column 3. When the impact rod 73 moves above the induction switch 9, the induction switch 9 switches the solenoid valve 63 to the closed state. At this time, the internal spaces of the main airbag 61 and the auxiliary airbag 65 are not connected to each other. When the impact rod 73 continues to move towards the car door side, the internal pressure at one end of the main airbag 61 close to the solenoid valve 63 increases. When the impact rod 73 collides with the car door, if the impact rod 73 continues to move towards the car door side, it is restricted by the end of the main airbag 61 with increased pressure, thereby preventing the impact rod 73 from colliding with the car door for the second or multiple times; Specifically, when the limiting block 71 moves towards the door side, the roller 711 continuously presses the main airbag 61. When the solenoid valve 63 is not closed, the internal pressure of the auxiliary airbag 65 continuously increases, and then the auxiliary airbag 65 expands, thereby pushing the reinforcement block 44 to move horizontally towards the pillar 3 until the tooth-shaped protrusion 441 fits with the tooth groove 33. When the solenoid valve 63 is closed, the internal pressure at one end of the main airbag 61 close to the solenoid valve 63 increases, thereby preventing the impact rod 73 from continuing to move towards the door side after hitting the door and causing a secondary collision.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A door lock safety performance testing device for automobile collision tests, comprising a chassis (1) and a slider (2), characterized in that: It also includes a strut (3), a door mounting assembly (4), a limit frame (5), an airbag assembly (6), an impact assembly (7), an electromagnetic accelerator (8) and an induction switch (9). The strut (3) is correspondingly mounted on the top of the slider (2). The door mounting assembly (4) is slidably mounted inside the strut (3). Two of the limit frames (5) are symmetrically mounted on both sides of the chassis (1). The airbag assembly (6) is mounted on the surface of the limit frame (5), and the end parts of the airbag assembly (6) respectively extend to two door mounting assemblies (4) on one side close to the limit frame (5). Two of the impact assemblies (7) are respectively symmetrically mounted inside the two limit frames (5). The electromagnetic accelerator (8) is mounted at the end of the limit frame (5). The induction switch (9) is embedded in the surface of the limit frame (5). When the power of the electromagnetic accelerator (8) is turned on, the impact assembly (7) moves rapidly towards the door mounting assembly (4). When the impact assembly (7) moves, it squeezes the airbag assembly (6). At the same time, the airbag assembly (6) presses on the door mounting assembly (4) and increases the contact area between the door mounting assembly (4) and the strut (3). When the impact assembly (7) passes through the induction switch (9), the airbag assembly (6) applies resistance to the impact assembly (7).

2. The door lock safety performance test device for vehicle collision tests according to claim 1, characterized in that: Perforations (31) are provided at equal intervals between the two sides of the strut (3), and a through rod (32) passing through the door mounting assembly (4) is inserted into the perforations (31). Tooth grooves (33) symmetrically distributed with respect to the perforations (31) are provided on the inner wall of the strut (3).

3. The door lock safety performance testing device for vehicle collision tests according to claim 2, characterized in that: The door mounting assembly (4) includes an adjustment block (41), a longitudinal sliding groove (42), a limit rod (43) and a reinforcement block (44). The adjustment block (41) is slidably arranged inside the strut (3), and a round hole adapted to the through rod (32) is provided in the adjustment block (41). A hinge or a door nose buckle for mounting the door is mounted at the end of the adjustment block (41). Two of the longitudinal sliding grooves (42) are symmetrically provided at the top of the adjustment block (41). Two of the reinforcement blocks (44) are symmetrically arranged and respectively slidably arranged inside the two longitudinal sliding grooves (42). The limit rod (43) is mounted inside the longitudinal sliding groove (42), and the limit rod (43) is slidably connected to the reinforcement block (44). A spring abutting between the adjustment block (41) and the reinforcement block (44) is sleeved on the outer periphery of the limit rod (43).

4. The door lock safety performance testing device for vehicle collision tests according to claim 3, characterized in that: The cross-section structure of the reinforcement block (44) is an inverted L shape, and a tooth-shaped protrusion (441) is integrally formed on one side of the reinforcement block (44) close to the strut (3). The tooth-shaped protrusion (441) is adapted to the tooth groove (33).

5. The door lock safety performance test device for vehicle collision tests according to claim 4, characterized in that: The airbag assembly (6) includes a main airbag (61), an end sealing seat (62), a solenoid valve (63), an air pipe (64), and an auxiliary airbag (65). The main airbag (61) is fitted and installed in the limit frame (5). The end sealing seat (62) is fitted and installed at the end of the main airbag (61). The solenoid valve (63) is installed at the end of the main airbag (61), and the solenoid valve (63) is in contact with the side wall of the limit frame (5). Both of the two air pipes (64) are connected to the solenoid valve (63). The auxiliary airbag (65) is installed on the surface of the adjusting block (41), and the auxiliary airbag (65) is located between two reinforcing blocks (44). The end of the auxiliary airbag (65) is connected to the air pipe (64).

6. The door lock safety performance test device for vehicle collision test according to claim 5, characterized in that: The main airbag (61) is configured as a flat columnar shape, and the end sealing seat (62) is located on the side of the main airbag (61) away from the chassis (1).

7. The door lock safety performance testing device for vehicle collision tests according to claim 1, characterized in that: The impact assembly (7) includes a limit block (71), a permanent magnet (72), and an impact rod (73). The limit block (71) is slidably arranged in the limit frame (5). The permanent magnet (72) and the impact rod (73) are both installed on the surface of the limit block (71), and the permanent magnet (72) is located on the side of the impact rod (73) close to the electromagnetic accelerator (8).

8. The door lock safety performance testing device for vehicle collision tests according to claim 7, characterized in that: A roller (711) is rotatably installed at the bottom of the limit block (71), and the roller (711) presses the main airbag (61) when the limit block (71) moves.

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