A door lock safety performance testing device for automobile collision tests

Abstract

The present invention relates to the field of automobile testing technology, and specifically to a vehicle door lock safety performance testing device for automobile collision tests, comprising a chassis, a slider, a pillar, a door mounting assembly, a limit frame, an airbag assembly, an impact assembly, an electromagnetic accelerator, and an induction switch. The pillars are correspondingly mounted on the top of the slider, the door mounting assembly is slidably mounted on the inner side of the pillars, two limit frames are symmetrically mounted on either side of the chassis, the airbag assembly is mounted on the surface of the limit frame, and the ends of the airbag assembly extend to two door mounting assemblies adjacent to one side of the limit frame. The present invention solves the problem that the hinges and door nose buckle parts of the test device are easily deformed due to impact, thereby affecting the subsequent testing operations, and that the impact structure collides with the vehicle door and causes a secondary collision, making it impossible to accurately collect single collision data. By adjusting the pressure at corresponding positions within the airbag assembly during the automobile collision test, the present invention solves the problem that the hinges and door nose buckle parts of the test device are easily deformed due to impact, thereby affecting the subsequent testing operations, and that the impact structure collides with the vehicle door and causes a secondary collision, thereby preventing the accurate collection of single collision data.

Description

Technical Field

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

[0002] Vehicle crash testing is a key testing method in automotive safety research and development. It evaluates a vehicle's safety performance by simulating various potential collision scenarios that might occur during actual driving. Door lock safety is one of the key areas of crash testing. Its primary purpose is to assess the safety of door locks during a vehicle crash, ensuring they will not accidentally open during a collision, thereby reducing the risk of injury to occupants. Furthermore, after a collision, the door locks should be able to unlock properly, allowing occupants to escape safely. This testing verifies that door locks can open and close properly after a collision, ensuring the effectiveness of emergency escape functions.

[0003] Since the door lock is located at the edge of the door, considering the cost of automobile crash tests, when conducting a crash test on the safety performance of the door lock, there is no need to conduct a whole vehicle crash test like other tests. Usually, the door lock is installed on the door, and then the door is installed on the test frame. A high-speed moving object hits the door at different positions and angles, and observes whether the door opens during the collision and whether the door can be opened after the collision.

[0004] In the prior art, vehicle doors are often mounted on a vehicle door lock safety performance test device through hinges and door nose catches. Due to the differences in door shapes and sizes of different vehicle models, and the differences in the front and rear doors of the same vehicle, the parts of the vehicle door lock safety performance test device used to fix the hinges and door nose catches need to be flexibly adjusted. This causes the parts of the vehicle door lock safety performance test device where the hinges and door nose catches are installed to be easily deformed when the vehicle door suffers a major impact, thereby affecting the installation limit of subsequent vehicle doors, resulting in high door lock testing costs and adverse interference with test efficiency; in addition, when the impacting object moves at high speed towards the vehicle door lock safety performance test device, under the action of inertia, the impact structure that drives the object to move at high speed continues to move back and forth after colliding with the vehicle door, and collides with the vehicle door multiple times, thereby causing the door lock safety performance test device to be unable to accurately collect single collision data.

[0005] Therefore, a vehicle door lock safety performance testing device for vehicle collision test is proposed. Summary of the Invention

[0006] The present invention aims to provide a vehicle door lock safety performance testing device for automobile crash tests. The device utilizes an electromagnetic accelerator to drive an impact assembly toward the vehicle door at high speed, whereby the impact assembly squeezes an airbag assembly, raising the airbag at one end of the airbag assembly located inside the door mounting assembly. This increases the contact area between the door mounting assembly and the pillar, thereby improving the stability between the two. Furthermore, after the impact assembly collides with the vehicle door, the pressure of the airbag assembly near the end of the limit frame is increased, thereby preventing multiple collisions between the impact assembly and the vehicle door. This device addresses the issues of deformation of the test device's mounting hinges and door nose catches due to impact, which can affect subsequent testing operations, and the inability to accurately collect single collision data due to secondary collisions with the vehicle door after the impact structure collides. While ensuring door installation efficiency before the test, the device can improve the connection stability between the door mounting assembly and the pillar during a crash test, thereby preventing deformation of the door mounting assembly after the test, which could affect subsequent testing. Furthermore, the device can limit the impact assembly near the end of the limit frame, preventing multiple collisions between the impact assembly and the vehicle door, which could result in the inability to collect single collision data.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A vehicle door lock safety performance testing device for automobile collision tests comprises a base frame, a slider, and further comprises a pillar, a door mounting assembly, a limit frame, an airbag assembly, an impact assembly, an electromagnetic accelerator and an induction switch, wherein the pillars are correspondingly mounted on the top of the slider, the door mounting assembly is slidably mounted on the inner side of the pillars, two limit frames are symmetrically mounted on both sides of the base frame, the airbag assembly is mounted on the surface of the limit frame, and the ends of the airbag assembly respectively extend to the two door mounting assemblies close to one side of the limit frame, the two impact assemblies are respectively symmetrically mounted in the two limit frames, the electromagnetic accelerator is mounted on the end of the limit frame, and the induction switch is embedded in the surface of the limit frame, when the electromagnetic accelerator power is turned on, the impact assembly moves at high speed toward the side of the door mounting assembly, and when the impact assembly moves, it squeezes the airbag assembly, and at the same time the airbag assembly applies pressure to the door mounting assembly and increases the contact area between the door mounting assembly and the pillar, and when the impact assembly passes the induction switch, the airbag assembly applies resistance to the impact assembly.

[0009] Preferably, through holes are provided between both sides of the pillar at equal intervals, and a through rod passing through the door mounting assembly is provided through the through holes, and tooth grooves are provided on the inner wall of the pillar at symmetrical distribution with respect to the through holes.

[0010] Preferably, the vehicle door mounting assembly includes an adjusting block, a longitudinal slide groove, a limiting rod and a reinforcement block, the adjusting block is slidably arranged in the pillar, and the adjusting block is provided with a circular hole adapted to the through rod, a hinge or door nose buckle for installing the vehicle door is installed at the end of the adjusting block, the two longitudinal slide grooves are symmetrically opened at the top of the adjusting block, the two reinforcement blocks are symmetrically arranged and slidably arranged in the two longitudinal slide grooves respectively, the limiting rod is installed in the longitudinal slide groove, and the limiting rod is slidably connected to the reinforcement block, and a spring is sleeved on the outer periphery of the limiting rod to abut between the adjusting block and the reinforcement block.

[0011] Preferably, the cross-section of the reinforcement block is an inverted L-shape, and a tooth-shaped protrusion is integrally formed on the side of the reinforcement block close to the pillar, and the tooth-shaped protrusion is adapted to the tooth groove.

[0012] Preferably, the airbag assembly includes a main airbag, an end sealing seat, a solenoid valve, an air pipe and a secondary airbag. The main airbag is fitly installed in the limit frame, the end sealing seat is fitly installed at the end of the main airbag, the solenoid valve is installed at the end of the main airbag, and the solenoid valve is fit with the side wall of the limit frame. The two air pipes are connected to the solenoid valve. The secondary airbag is installed on the surface of the adjustment block, and the secondary airbag is located between the two reinforcement blocks. The end of the secondary airbag is connected to the air pipe.

[0013] Preferably, the main airbag is constructed in a flat columnar shape, and the end sealing seat is located on the side of the main airbag away from the base frame.

[0014] Preferably, the impact assembly includes a limit block, a permanent magnet and an impact rod, the limit block is slidably arranged in the limit frame, the permanent magnet and the impact rod are both installed on the surface of the limit block, and the permanent magnet is located on the side of the impact rod close to the electromagnetic accelerator.

[0015] Preferably, a roller is rotatably mounted on the bottom of the limit block, and the roller squeezes the main airbag when moving with the limit block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the present invention conducts a safety performance test on a door lock in an automobile collision test, the position of the adjustment block is changed due to differences in door sizes. It is only necessary to pull out the penetration rod, move the adjustment block to an appropriate height, and then insert the penetration rod through the adjustment block. After the test begins, the impact assembly applies pressure to the airbag assembly to increase the pressure at one end of the airbag assembly between the reinforcement blocks. The secondary airbag expands and pushes the reinforcement block to contact the pillar, effectively improving the structural stability between the door mounting assembly and the pillar, avoiding deformation of the door mounting assembly during the collision test and affecting subsequent testing, effectively ensuring the efficiency of the test of the safety performance of the door lock in the automobile collision test, and stably controlling the test cost. In addition, after the impact assembly collides with the door at high speed, the internal pressure of the airbag assembly near the solenoid valve increases, thereby effectively preventing the impact rod from colliding with the door multiple times, which is conducive to accurately collecting single collision data in the automobile collision test, thereby improving the accuracy of the door lock safety performance test.

[0018] 2. By setting up the pillar and door installation assembly, when testing doors of different sizes and shapes, you only need to pull out the through rod to change the relative position of the adjustment block and the pillar, then pass the through rod through the adjustment block and horizontally change the position of the pillar. This is conducive to quickly installing the door on the pillar, which in turn helps to improve the safety performance testing efficiency of the door lock.

[0019] 3. Through the set airbag assembly, impact assembly and induction switch, when the impact rod moves horizontally to a specific position along the limit frame, the induction switch detects that the impact rod has passed and closes the solenoid valve. At this time, when the impact assembly continues to move, the roller squeezes the main airbag and increases 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 lot of kinetic energy is lost. When the impact rod rebounds and moves toward the car door again, the main airbag with higher end pressure can limit the secondary movement stroke of the impact rod, thereby avoiding secondary or multiple collisions between the impact rod and the car door, ensuring that the door lock data can be collected in a single car collision test, thereby effectively improving the accuracy of the door lock safety performance test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 Schematic diagram of the structure of the airbag assembly of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the pillar of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the impact assembly of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the main airbag and the end sealing seat of the present invention;

[0025] Figure 6 This is a schematic structural diagram of the door mounting assembly of the present invention;

[0026] Figure 7 This is a schematic structural diagram of the adjusting block of the present invention.

[0027] In the figure: 1, chassis; 2, slider; 3, strut; 31, perforation; 32, through rod; 33, tooth groove; 4, door mounting assembly; 41, adjusting block; 42, longitudinal sliding groove; 43, limiting rod; 44, reinforcing block; 441, tooth-shaped protrusion; 5, limiting frame; 6, airbag assembly; 61, main airbag; 62, end sealing seat; 63, solenoid valve; 64, air pipe; 65, sub-airbag; 7, impact assembly; 71, limiting block; 711, roller; 72, permanent magnet; 73, impact rod; 8, electromagnetic accelerator; 9, induction switch. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1 to 7 , the present invention provides a door lock safety performance test device for automobile collision tests, and the technical solutions are as follows:

[0030] Refer to Figure 1 , a door lock safety performance test device for automobile collision tests, including a chassis 1, sliders 2. The chassis 1 is square-shaped when viewed from above, and parallel linear chutes are provided on its surface. Two sliders 2 are slidably limited in each linear chute. It also includes struts 3, a door mounting assembly 4, a limiting frame 5, an airbag assembly 6, an impact assembly 7, an electromagnetic accelerator 8 and an induction switch 9. The struts 3 are correspondingly installed on the tops of the sliders 2, and the number of struts 3 is four, which are respectively installed on the tops of the four sliders 2. When installing doors of different sizes, first拨动 the struts 3 to adjust the distance between the struts 3 to a suitable size. The door mounting assembly 4 is slidably installed inside the struts 3. The two door mounting assemblies 4 located above the same linear chute are respectively used to fix the door hinge and the door nose buckle. The two limiting frames 5 are symmetrically installed on both sides of the chassis 1. The airbag assembly 6 is installed on the surface of the limiting 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 limiting frame 5, and these two door mounting assemblies 4 are located above the same linear chute. Combined with Figure 1It can be seen that there are two limit frames 5 and two airbag assemblies 6, and four door mounting assemblies 4; the two impact assemblies 7 are symmetrically installed in the two limit frames 5, and the impact assembly 7 is connected to the limit frame 5 in a limited sliding manner. Limiting slots are provided on both sides of the limit frame 5 to limit the movement trajectory of the impact assembly 7, so that the impact assembly 7 can only move horizontally along the inner wall of the limit frame 5, and the electromagnetic accelerator 8 is installed at the end of the limit frame 5. The electromagnetic accelerator 8 is an electromagnet corresponding to the size of the impact assembly 7, and the induction switch 9 is embedded in the surface of the limit frame 5. The induction switch 9 is located on the side of the limit frame 5 surface close to the chassis 1, and the induction switch 9 is connected to the airbag assembly 6. When the induction switch 9 switches the control state, the internal space partition of the airbag assembly 6 is changed; when the power of the electromagnetic accelerator 8 is turned on, the impact assembly 7 moves toward the door mounting One side of the component 4 moves at high speed, and the impact component 7 squeezes the airbag component 6 when it moves. At the same time, the airbag component 6 puts pressure on the door mounting component 4 and increases the contact area between the door mounting component 4 and the pillar 3, thereby effectively improving the structural stability between the door mounting component 4 and the pillar 3 in the automobile collision test, effectively preventing the door mounting component 4 from deforming when subjected to impact, ensuring the subsequent continuous testing of the door lock safety performance, and effectively reducing the testing cost, and greatly improving the efficiency of the door lock safety performance test. When the impact component 7 passes through the sensing switch 9, the airbag component 6 applies resistance to the impact component 7, which is conducive to avoiding secondary or multiple collisions between the impact component 7 and the door, ensuring that a single data can be accurately collected during the door lock safety performance test, thereby improving the accuracy of the door lock safety performance test.

[0031] Reference Figure 3 As a specific embodiment of the present invention, specifically, equally spaced through holes 31 are provided between the two sides of the pillar 3, and a through rod 32 passing through the door mounting assembly 4 is passed through the through hole 31. The inner wall of the pillar 3 is provided with tooth grooves 33 symmetrically distributed about the through hole 31. The spacing between adjacent through holes 31 is an integer multiple of the spacing between adjacent tooth grooves 33. When installing doors of different sizes on the door mounting assembly 4, the through rod 32 is pulled out and adjusted to a suitable height, and then the through rod 32 is passed through the door mounting assembly 4, and the horizontal position of the pillar 3 is adjusted horizontally.

[0032] Reference Figure 1 、 Figure 6 and Figure 7As a specific embodiment of the present invention, specifically, the car door mounting assembly 4 includes an adjusting block 41, a longitudinal slide groove 42, a limiting rod 43 and a reinforcing block 44. The adjusting block 41 is slidably arranged in the pillar 3, and the adjusting block 41 can move vertically along the inner wall of the pillar 3. The adjusting block 41 is provided with a round hole adapted to the through rod 32. 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 door nose buckle for installing the car door is installed at the end of the adjusting block 41. Two longitudinal slide grooves 42 are symmetrically opened at the top of the adjusting block 41. Two reinforcing blocks 44 are symmetrically arranged and slidably arranged in the two longitudinal slide grooves 42 respectively. The limiting rod 43 is installed in the longitudinal slide groove 42 The inner portion is provided with a limit rod 43 and a sliding connection with the reinforcement block 44. The outer periphery of the limit rod 43 is provided with a spring which abuts between the adjustment block 41 and the reinforcement block 44. When the car collision test starts, the impact assembly 7 moves toward the side of the car door where the end of the adjustment block 41 is installed. The impact assembly 7 applies pressure to the airbag assembly 6 so that the airbag assembly 6 is located between the reinforcement blocks 44. The end thereof expands and the reinforcement block 44 is pushed toward the side of the pillar 3 so that the reinforcement block 44 fits with the pillar 3, thereby improving the structural stability between the car door mounting assembly 4 and the pillar 3 in the car collision test, preventing the adjustment block 41 from being easily deformed, and after the test is completed, the reinforcement block 44 can be reset by using the spring, so that the position of the adjustment block 41 can be conveniently changed when testing a car door of a different size next time, thereby effectively ensuring the efficiency of the door lock safety performance test.

[0033] Reference Figure 3 and Figure 7 As a specific embodiment of the present invention, specifically, the cross-section of the reinforcement block 44 is an inverted L-shape, and the reinforcement block 44 is integrally formed with a tooth-shaped protrusion 441 on the side close to the pillar 3. The tooth-shaped protrusion 441 is adapted to the tooth groove 33. When the reinforcement block 44 moves toward the side of the pillar 3, the tooth-shaped protrusion 441 fits with the tooth groove 33, thereby effectively increasing the contact area between the reinforcement block 44 and the pillar 3, thereby greatly improving the stability between the reinforcement block 44 and the pillar 3 in the automobile collision test.

[0034] Reference Figure 2 and Figure 5As 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 an auxiliary airbag 65. The main airbag 61 is fitted in the limit frame 5, the bottom of the main airbag 61 is bonded and fixed to the inner bottom surface of the limit frame 5, the end sealing seat 62 is fitted 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 fitted with the side wall of the limit frame 5, the two air pipes 64 are connected to the solenoid valve 63, the auxiliary airbag 65 is installed on the surface of the adjustment block 41, and the auxiliary airbag 65 is positioned at the bottom of the limit frame 5. Between the two reinforcement blocks 44, the end of the auxiliary airbag 65 is connected to the air pipe 64. The air pipe 64 adopts a high-pressure resistant threaded metal tube, which will not deform when the internal pressure changes. After the induction switch 9 turns on the power of the solenoid valve 63, the solenoid valve 63 is in a closed state. At this time, the main airbag 61 and the auxiliary airbag 65 are in a disconnected state. When the roller 711 continues to squeeze the main airbag 61, the pressure inside the main airbag 61 near the end of the solenoid valve 63 increases, and then the main airbag 61 is used to limit the moving trajectory of the limit block 71 to avoid secondary or multiple collisions between the impact rod 73 and the car door.

[0035] Reference Figure 5 As a specific embodiment of the present invention, specifically, the main airbag 61 is constructed as a flat columnar shape, and the end sealing seat 62 is located on the side of the main airbag 61 away from the base frame 1. The flat cylindrical main airbag 61 is convenient for squeezing the roller 711 when it moves, thereby changing the internal pressure of the main airbag 61 and the auxiliary airbag 65.

[0036] Reference Figure 4As 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 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. When the power of the electromagnetic accelerator 8 is turned on, the electromagnetic accelerator 8 generates the same magnetism as the permanent magnet 72 on the side close to the permanent magnet 72, thereby driving the permanent magnet 72 to move at high speed along the limit block 71 along the limit frame 5 to the side of the chassis 1. The bottom of the limit block 71 is rotatably installed with a roller 711. When the roller 711 moves with the limit block 71, it squeezes the main airbag 61. The roller When 711 squeezes the main airbag 61 and the solenoid valve 63 is not in a closed state, the internal pressure of the auxiliary airbag 65 continues to rise, and then the auxiliary airbag 65 expands and pushes the reinforcement block 44 to move toward the side of the pillar 3, so that the tooth-shaped protrusion 441 of the reinforcement block 44 fits with the tooth groove 33 of the pillar 3. When the solenoid valve 63 is in a closed state, the internal pressure of the main airbag 61 close to the solenoid valve 63 increases, and then after the impact rod 73 collides with the car door, the impact rod 73 subsequently rebounds and moves under the action of the end of the main airbag 61 with increased pressure, thereby limiting 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 compressed is equal to the diameter value of the roller 711.

[0037] Working principle: Before the car collision test, first adjust the distance between the pillars 3 and the vertical height of the adjustment block 41 on the inner side of the pillar 3, then install the car door on the hinge and door nose buckle at the end of the adjustment block 41. During the experiment, turn on the power of the electromagnetic accelerator 8. The electromagnetic accelerator 8 generates the same magnetism as the permanent magnet 72 on the side close to the permanent magnet 72, thereby driving the impact component 7 to move toward the car door at high speed. During the movement of the impact component 7, it continuously squeezes the airbag component 6 below. The pressure at the end between the reinforcement blocks 44 increases and the airbag component 6 expands and deforms, pushing the reinforcement block 44 to move horizontally and contact with the pillar 3. The shaped protrusion 441 fits in with the tooth groove 33 to enhance the structural stability between the reinforcement block 44 and the pillar 3. When the impact rod 73 moves above the sensor switch 9, the sensor 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 toward the vehicle door, the internal pressure of the main airbag 61 near the solenoid valve 63 increases. When the impact rod 73 collides with the vehicle door, if the impact rod 73 continues to move toward the vehicle door, it will be restricted by the end of the main airbag 61 with increased pressure, thereby preventing the impact rod 73 from colliding with the vehicle door a second or multiple times.

[0038] Specifically, when the limit block 71 moves toward the vehicle door side, the roller 711 continuously squeezes the main airbag 61. When the solenoid valve 63 is not closed, the internal pressure of the auxiliary airbag 65 continues to increase, and then the auxiliary airbag 65 expands, thereby pushing the reinforcement block 44 to move horizontally toward the side of 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 of the main airbag 61 close to the solenoid valve 63 increases, thereby preventing the impact rod 73 from continuing to move toward the vehicle door side after colliding with the vehicle door and causing a secondary collision.

[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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 base frame (1) and a slider (2), characterized in that: The invention also includes 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), wherein the pillar (3) is correspondingly mounted on the top of the slider (2), the door mounting assembly (4) is slidably mounted on the inner side of the pillar (3), the two 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 ends of the airbag assembly (6) respectively extend to the two door mounting assemblies (4) on one side of the limit frame (5), and the two impact assemblies (7) are symmetrically mounted on the inner side of the pillar (3). The electromagnetic accelerator (8) is installed in two limit frames (5), the electromagnetic accelerator (8) is installed at the end of the limit frame (5), and the induction switch (9) is embedded in the surface of the limit frame (5). When the electromagnetic accelerator (8) is powered on, the impact component (7) moves at high speed toward the side of the door mounting component (4). When the impact component (7) moves, it squeezes the airbag component (6). At the same time, the airbag component (6) applies pressure to the door mounting component (4) and increases the contact area between the door mounting component (4) and the pillar (3). When the impact component (7) passes the induction switch (9), the airbag component (6) applies resistance to the impact component (7); The vehicle door installation assembly (4) comprises an adjustment block (41), a longitudinal slide groove (42), a limiting rod (43) and a reinforcement block (44); The airbag assembly (6) comprises 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 in the limit frame (5); the end sealing seat (62) is fitted 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 fitted with the side wall of the limit frame (5); the two air pipes (64) are connected to the solenoid valve (63); the auxiliary airbag (65) is installed on the surface of the adjustment block (41), and the auxiliary airbag (65) is located between the two reinforcement blocks (44); the end of the auxiliary airbag (65) is connected to the air pipe (64); The main airbag (61) is constructed in a flat columnar shape, and the end sealing seat (62) is located on a side of the main airbag (61) away from the base frame (1); The impact assembly (7) comprises 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 mounted on the surface of the limit block (71), and the permanent magnet (72) is located on a side of the impact rod (73) close to the electromagnetic accelerator (8); A roller (711) is rotatably mounted on the bottom of the limiting block (71), and the roller (711) squeezes the main airbag (61) when moving with the limiting block (71).

2. The door lock safety performance testing device for automobile collision test according to claim 1, characterized in that: Through holes (31) distributed at equal intervals are provided between the two sides of the pillar (3), and a through rod (32) penetrating the door mounting assembly (4) is provided in the through hole (31), and tooth grooves (33) distributed symmetrically about the through hole (31) are provided on the inner wall of the pillar (3).

3. The door lock safety performance testing device for automobile collision test according to claim 2, characterized in that: The adjusting block (41) is slidably arranged in the pillar (3), and the adjusting block (41) is provided with a circular hole adapted to the through rod (32). A hinge or door nose buckle for installing a vehicle door is installed at the end of the adjusting block (41). The two longitudinal sliding grooves (42) are symmetrically opened on the top of the adjusting block (41). The two reinforcing blocks (44) are symmetrically arranged and slidably arranged in the two longitudinal sliding grooves (42) respectively. The limiting rod (43) is installed in the longitudinal sliding groove (42), and the limiting rod (43) is slidably connected to the reinforcing block (44). The outer periphery of the limiting rod (43) is provided with a spring that abuts between the adjusting block (41) and the reinforcing block (44).

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

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