Automobile A-pillar strength collision test device and working method

Abstract

The invention discloses a vehicle A-pillar strength collision test device and a working method, which relates to the technical field of A-pillar strength collision test analysis, and aims to solve the technical problem of high cost of vehicle A-pillar strength collision test, including a slide seat, a test bench, a vehicle shell fixture, a mounting block A, a mounting block B, a rotating mechanism, a barrier mechanism, a screw moving mechanism, a slide groove, a slider, a bottom column, a worm gear, a top column and a worm. The invention fixes a vehicle empty shell on the test bench, installs a dummy on the vehicle empty shell, drives two worms to rotate through a rotating mechanism, so that the worm gear drives the bottom column and the slider to move along the slide groove, so that the vehicle empty shell collides with the barrier mechanism, simulates the state of a frontal collision of the vehicle A-pillar, tests the collision strength of the vehicle A-pillar, replaces the test vehicle damage with the damage of the vehicle empty shell, analyzes the collision strength of the vehicle A-pillar in combination with the damage of the dummy and the vehicle A-pillar, and reduces the cost of the vehicle A-pillar strength collision test.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile A-pillar strength collision test, and more specifically, to an automobile A-pillar strength collision test device and a working method. Background Art

[0002] The A-pillar of a car refers to the pillars on both sides of the car's front windshield, that is, the metal pillars on both sides of the car's front windshield. Viewed from the side of the car, the A-pillar is an important component of the vehicle structure and plays a vital role in the vehicle's overall rigidity and safety. When the vehicle collides, the A-pillar can protect the safety of the occupants in the car. As a frontal impact energy transmission channel in the mechanical structure, it can transfer the impact energy of the front of the car to the roof, thereby reducing the impact on the passenger compartment.

[0003] The A-pillar strength collision test items of automobiles are generally based on typical and common collision conditions extracted from the study of traffic accidents. Common collision test items mainly include frontal collision test, frontal 40% offset collision test, frontal 25% offset collision test, side collision test, and side pillar collision test. The collision test is a destructive test. In the side pillar collision test, a rigid cylinder is vertically installed on a fixed barrier, and the vehicle is driven to a speed of 32km / h and the left side of the vehicle collides with the rigid cylinder. During the collision, a collision angle of 75°±3° is formed between the vertical plane parallel to the vehicle velocity vector and the longitudinal center line of the vehicle. In the frontal collision test, the test vehicle hits the fixed barrier at a certain speed and angle to simulate a frontal collision accident in actual road traffic. In the side collision test, the test vehicle is stationary, and the mobile barrier trolley simulates the vehicle vertically hitting the driver's side of the test vehicle, and collides at a certain speed and angle. A large number of vehicles may be damaged in various tests, causing large economic losses, resulting in high cost of automobile A-pillar strength collision test. In view of this, we propose an automobile A-pillar strength collision test device and working method. Summary of the invention

[0004] The purpose of the present invention is to provide a vehicle A-pillar strength collision test device to solve the technical problem of high cost of vehicle A-pillar strength collision test.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: a vehicle A-pillar strength collision test device and a working method, comprising a slide seat, a slide slot is provided at the top of the slide seat, a slider is slidably connected to the slide slot, a bottom column is rotatably connected to the slider, a worm wheel is fixedly provided at the top of the bottom column, a top column is fixedly provided at the top of the worm wheel, both ends of the worm wheel are meshingly connected to a worm, a test bench is fixedly provided at the top of the top column, a vehicle shell fixture is arranged on the test bench, a mounting block A is fixedly provided at the head end of the slide seat, a mounting block B is fixedly provided at the tail end of the slide seat, and both ends of the worm are rotatably connected to the mounting block A and the mounting block B respectively; the mounting block A is hollow inside to form a mounting cavity, a rotating mechanism is arranged in the mounting cavity, the rotating mechanism has two rotating ends, and the two rotating ends are fixedly connected to the two worms respectively; a mounting slot is provided on the mounting block B, a screw moving mechanism is arranged on the mounting slot, and a barrier mechanism is arranged at the movable end of the screw moving mechanism. The present invention fixes an empty shell of a car on a test bench, installs a dummy on the empty shell of the car, drives two worms to rotate through a rotating mechanism, so that the worm gear drives a bottom column and a sliding block to move along a sliding groove, so that the empty shell of the car collides with a barrier mechanism, simulates a state of a frontal collision of an A-pillar of the car, tests the collision strength of the A-pillar of the car, uses damage to the empty shell of the car to replace damage to the test vehicle, analyzes the collision strength of the A-pillar of the car in combination with the damage condition of the dummy and the condition of the A-pillar of the car, and reduces the cost of the collision test of the strength of the A-pillar of the car.

[0006] Preferably, the rear end of the mounting block B is provided with a plurality of holes in a linear and equidistant structure, and one of the holes is plugged with a pin.

[0007] Preferably, the rotating mechanism includes an output part and a power part, the two output parts are symmetrically arranged at both ends of the mounting cavity, the two output parts are connected by a linkage part, the power part is arranged on the mounting block A relative to the linkage part, the output end of the power part is connected to the input end of the linkage part, and an adjustment part is provided on the linkage part.

[0008] Preferably, the output part includes a rotating tube and a rotating shaft, the rotating tube is rotatably arranged on the installation cavity, a helical gear ring is fixedly provided on the surface of the rotating tube, the rotating shaft is rotatably arranged at the tail end of the installation cavity relative to the helical gear ring, and the tail end of the rotating shaft is fixedly connected to the head end of the worm, the rotating end is composed of the rotating shaft, a helical gear is fixedly provided at the head end of the rotating shaft, the helical gear is meshed with the helical gear ring, and an internal gear ring is fixedly provided at one end of the helical gear ring away from the rotating shaft.

[0009] Preferably, the linkage part includes a sleeve, which is rotatably arranged on the side of the mounting block A away from the power part, and the end of the sleeve close to the power part penetrates into the mounting cavity and is fixedly provided with a first swivel seat, a first gear is rotatably connected to the first swivel seat, and the first gear is meshingly connected to the internal gear ring close to the power part, a second swivel seat A is fixedly arranged on the surface of the sleeve relative to the first gear, a second gear A is rotatably connected to the second swivel seat A, and the second gear A is meshingly connected to the first gear, a second swivel seat B is fixedly arranged on the surface of the sleeve relative to the second swivel seat A, a second gear B is rotatably connected to the second swivel seat B, the second gear B is meshingly connected to the internal gear ring away from the power part, and the second gear B is fixedly connected to the second gear B through a connecting shaft, a surface of the sleeve away from the power part is annularly equidistantly arranged with a plurality of limit grooves A, and a surface of the sleeve is annularly equidistantly arranged with a plurality of limit grooves B relative to the mounting cavity.

[0010] Preferably, the power unit includes a connecting rod and a motor, the connecting rod is rotatably arranged on the mounting cavity, the motor is fixed on the mounting block A relative to the connecting rod, one end of the connecting rod is fixedly connected to the motor output shaft, the other end of the connecting rod penetrates into the mounting cavity and is fixedly provided with a driving gear, the driving gear is meshingly connected with the first gear, the driving gear is rotatably connected with a swivel near one end of the sleeve, and the swivel is fixedly connected to the sleeve.

[0011] Preferably, the adjustment portion includes a sub-rod, a first engaging tooth ring A, a first engaging tooth ring B, a second engaging tooth ring A, a second engaging tooth ring B and an adjustment ring, the sub-rod is movably arranged in the sleeve, the first engaging tooth ring A is fixedly arranged at one end of the sub-rod close to the driving gear, the first engaging tooth ring B is fixedly arranged on the driving gear, the first engaging tooth ring A is engaged with the first engaging tooth ring B, the second engaging tooth ring A is fixedly arranged on the installation cavity, the second engaging tooth ring B is sleeved on the sleeve, and the second engaging tooth ring B and the sub-rod are connected in a ring-shaped manner with equal spacing. Several limit blocks B of the structural arrangement are fixedly connected, and several of the limit blocks B are respectively slidably connected to several of the limit grooves B. Several limit blocks A are fixedly arranged on the surface of the sub-rod relative to the positions of the several limit grooves A in a ring-shaped and equidistant structure. The limit blocks A are slidably connected to the limit grooves A. A ball block is fixedly arranged on the eccentric end of the limit block A. The adjustment ring is rotatably arranged on the sleeve relative to the positions of the several limit grooves A. Several translation guide grooves are opened in the adjustment ring relative to the positions of the several ball blocks. The translation guide grooves are movably connected to the ball blocks, and an adjustment screw groove is opened on the surface of the adjustment ring.

[0012] Preferably, the translation guide groove comprises a partial thread groove, and both ends of the partial thread groove are provided with limiting arc grooves.

[0013] Preferably, the barrier mechanism comprises a connecting block, the connecting block is fixedly arranged at the movable end of the screw moving mechanism, a rotating groove is provided at the top of the connecting block, a movable groove is provided at the bottom of the rotating groove, a rotating column is rotatably connected to the rotating groove, a movable block is fixedly arranged at the bottom of the rotating column, the movable block is movably connected to the movable groove, a through hole A is provided at a position of the connecting block relative to the insertion hole, a through hole B is provided at a position of the rotating column relative to the through hole A, the through hole A and the through hole B constitute a plug-in hole, the latch is plugged into and matched with the plug-in hole, and a barrier block is fixedly arranged at the top of the rotating column;

[0014] The barrier block comprises a barrier portion, a triangular portion is fixedly arranged on one side of the barrier portion, and a collision cylinder is fixedly arranged on one end of the triangular portion away from the barrier portion.

[0015] The method for using the above-mentioned automobile A-pillar strength collision test device comprises the following steps:

[0016] S1. Equipment work;

[0017] Fix the empty car shell on the test bench, install the necessary external sensors and data acquisition system, and put the dummy into the empty car shell.

[0018] S2, frontal collision debugging;

[0019] S2.1, position adjustment of barrier blocks;

[0020] According to the frontal collision test, compared with the empty shell position of the car, the movable end of the screw moving mechanism is controlled by an external control mechanism to drive the barrier block to move to the appropriate position.

[0021] Rotate the barrier block to one side of the barrier part close to the sliding seat, and insert the pin into the plug hole to rotate and fix the structure;

[0022] S2.2, debugging of rotating mechanism;

[0023] Insert the hexagonal wrench into the adjusting screw groove and rotate it, so that the adjusting ring rotates and drives the translation guide groove, so that the ball block moves to the limiting arc groove close to the driving gear side, and the axial limit of the ball block is completed. At this time, the first engaging tooth ring A is engaged with the first engaging tooth ring B, and the second engaging tooth ring A is disengaged from the second engaging tooth ring B;

[0024] S3, strength collision test;

[0025] The motor output shaft is controlled to rotate through an external control mechanism, so that the connecting rod drives the driving gear to rotate, and due to the meshing of the first engaging gear ring A and the first engaging gear ring B, the sub-rod rotates and the sleeve rotates through the sliding connection between the limit block A and the limit groove A, and the sliding connection between the limit block B and the limit groove B, so that the driving gear, the first gear, the second gear A and the second gear B will not rotate relative to each other, causing the two inner gear rings to rotate in the same direction, and the two helical gear rings to rotate in the same direction, causing the two rotating shafts to drive the two worms to rotate in the same direction, causing the worm wheel to drive the bottom column and the slider to move along the slide groove, and the test bench moves accordingly, and the rotation speed of the motor output shaft is controlled to control the moving speed of the test bench, so that the empty shell of the car collides with the barrier part, simulating the state of a frontal collision of the vehicle.

[0026] S4. Collision result analysis;

[0027] Analyze the collected data to evaluate the strength and structural stability of the A-pillar, as well as the occupant protection effect based on the damage to the dummy;

[0028] S7, 40% frontal offset collision test;

[0029] S7.1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them;

[0030] S7.2. Adjust the position of the barrier block according to the 40% offset frontal collision test as in step S2.1, and perform a 40% offset frontal A-pillar strength collision test as in step S3, and analyze the collision test results as in step S4;

[0031] S8, 25% frontal offset collision test;

[0032] S8.1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them;

[0033] S8.2. Adjust the position of the barrier block according to the 25% offset frontal collision test as in step S2.1, and perform a 40% offset frontal A-pillar strength collision test as in step S3, and analyze the collision test results as in step S4;

[0034] S9, debugging of side impact test;

[0035] S9.1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them;

[0036] S9.2, debugging of rotating mechanism;

[0037] Insert the hexagonal wrench into the adjusting screw groove and rotate it, so that the adjusting ring rotates and drives the translation guide groove, so that the ball block moves to the limiting arc groove away from the driving gear side, and the axial limit of the ball block is completed. At this time, the first engaging tooth ring A is disengaged from the first engaging tooth ring B, and the second engaging tooth ring A is engaged with the second engaging tooth ring B;

[0038] S9.3, debugging of test bench;

[0039] The motor output shaft is controlled to rotate by an external control mechanism, so that the connecting rod drives the driving gear to rotate. Since the second engaging toothed ring A is meshed with the second engaging toothed ring B, the sleeve cannot rotate, so that the driving gear drives the first gear to rotate, thereby causing the second gear A to rotate in the opposite direction relative to the first gear. The second gear A drives the second gear B to rotate in the opposite direction through the connecting shaft, causing the first gear and the second gear B to respectively drive the two inner toothed rings to rotate, and the two inner toothed rings rotate in the opposite direction, thereby causing the two rotating shafts to drive the two worms to rotate in the opposite direction, thereby causing the worm wheel to drive the bottom column to rotate relative to the slider, until the test bench rotates 90° accordingly;

[0040] S9.4, repeat the adjustment of the rotating mechanism in the same way as step S2.2 until the first engaging toothed ring A is engaged with the first engaging toothed ring B, and the second engaging toothed ring A is disengaged from the second engaging toothed ring B;

[0041] S10, side impact test;

[0042] S10.1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them;

[0043] S10.2. Adjust the position of the barrier block according to the side impact test as in step S2.1, perform the A-pillar strength test for side impact as in step S3, and analyze the impact test results as in step S4;

[0044] S11, side column impact test;

[0045] S11.1. Debugging the position of the barrier block;

[0046] According to the side column collision test, compared with the empty shell position of the car, the movable end of the screw moving mechanism is controlled by an external control mechanism to drive the barrier block to move to the appropriate position.

[0047] Rotate the barrier block to one side of the collision cylinder close to the sliding seat, and insert the pin into the plug hole to rotate and fix the structure;

[0048] S11.2, debugging of test bench;

[0049] After debugging the rotating mechanism as in S9.2, the first engaging toothed ring A is disengaged from the first engaging toothed ring B, and the second engaging toothed ring A is meshed with the second engaging toothed ring B. The motor output shaft is controlled to rotate by an external control mechanism to rotate the test bench so that a collision angle of 75°±3° is formed between the vertical plane parallel to the vehicle shell vector and the longitudinal centerline of the vehicle during the collision. The rotating mechanism is repeatedly debugged as in S2.2 until the first engaging toothed ring A is meshed with the first engaging toothed ring B, and the second engaging toothed ring A is disengaged from the second engaging toothed ring B.

[0050] S11.3. Perform the A-pillar strength test for side impact as in step S3, and analyze the impact test results as in step S4.

[0051] The beneficial effects of the present invention are:

[0052] 1. The present invention fixes an empty car shell on a test bench, installs a dummy on the empty car shell, drives two worms to rotate through a rotating mechanism, so that the worm gear drives a bottom column and a slide block to move along a slide groove, so that the empty car shell collides with a barrier mechanism, simulates a state of a frontal collision of an A-pillar of the car, tests the collision strength of the A-pillar of the car, replaces the damage of the test vehicle with the damage of the empty car shell, analyzes the collision strength of the A-pillar of the car in combination with the damage condition of the dummy and the condition of the A-pillar of the car, and reduces the cost of the collision test of the strength of the A-pillar of the car.

[0053] 2. The present invention adopts a structural design of the rotating mechanism, so that the hexagonal wrench is inserted into the adjusting screw groove and rotated, so that the adjusting ring rotates and drives the translation guide groove, so that the ball block moves to the limiting arc groove away from the side of the driving gear, and the axial limiting of the ball block is completed. At this time, the first engaging tooth ring A is disengaged from the first engaging tooth ring B, and the second engaging tooth ring A is meshed with the second engaging tooth ring B. The motor output shaft is controlled to rotate by the external control mechanism, so that the connecting rod drives the driving gear to rotate. Since the first engaging tooth ring A is meshed with the first engaging tooth ring B, the sub-rod rotates. The sleeve is rotated through the sliding connection between the limit block A and the limit slot A, and the sliding connection between the limit block B and the limit slot B, so that the driving gear, the first gear, the second gear A and the second gear B will not rotate relative to each other, so that the two inner gear rings rotate in the same direction, so that the two helical gear rings rotate in the same direction, so that the two rotating shafts drive the two worms to rotate in the same direction, so that the worm wheel drives the bottom column and the slider to move along the slide slot, and the test bench moves accordingly, and the rotation speed of the motor output shaft is controlled to control the moving speed of the test bench to simulate the driving state of the vehicle;

[0054] Insert the hexagonal wrench into the adjusting screw groove and rotate it, so that the adjusting ring rotates and drives the translation guide groove, so that the ball block moves to the limiting arc groove away from the side of the driving gear, and the axial limiting of the ball block is completed. At this time, the first engaging gear ring A is disengaged from the first engaging gear ring B, and the second engaging gear ring A is meshed with the second engaging gear ring B. The motor output shaft is controlled to rotate by the external control mechanism, so that the connecting rod drives the driving gear to rotate. Since the second engaging gear ring A is meshed with the second engaging gear ring B, the sleeve cannot rotate, so that the driving gear drives the first gear to rotate, thereby making the second gear A rotate in the opposite direction relative to the first gear, and the second gear A drives the second gear B to rotate in the opposite direction through the connecting shaft, causing the first gear and the second gear B to respectively drive the two inner gear rings to rotate, and the two inner gear rings rotate in the opposite direction, thereby making the two rotating shafts drive the two worms to rotate in the opposite direction, so that the worm wheel drives the bottom column to rotate relative to the slider, which is used to adjust the angle of the test bench and is applied to side impact test and side column impact test.

[0055] 3. The present invention also ensures, through the further design of the translation guide groove, that after the adjustment part is adjusted, the limiting arc groove limits the axial position of the ball block to prevent it from shifting after the second engaging gear ring A is meshed with the second engaging gear ring B or the second gear A is meshed with the first gear, thereby ensuring the stability of the linkage part during the linkage process and facilitating adjustment, which is beneficial to improving the test efficiency of the automobile A-pillar strength collision test.

[0056] 4. The present invention further designs the barrier mechanism, and uses the barrier portion of the barrier block for frontal collision test, 40% frontal offset collision test, 25% frontal offset collision test, and side collision test, and the collision cylinder is used for side column collision test without replacement, thereby further improving the test efficiency of the automobile A-pillar strength collision test; and by setting the movable block to be movably connected with the movable groove, and setting the movable angle of the movable block in the movable groove to 180°, it is convenient for workers to adjust the direction of the barrier block, saving time, and further improving the test efficiency of the automobile A-pillar strength collision test. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic diagram of the overall structure of the present invention under an experimental state.

[0058] Figure 2 for Figure 1 Schematic diagram of the explosion structure.

[0059] Figure 3 for Figure 2 Schematic diagram of partial structure explosion.

[0060] Figure 4 for Figure 3 Schematic diagram of partial structure explosion.

[0061] Figure 5 for Figure 4 Schematic diagram of partial structure explosion.

[0062] Figure 6 for Figure 5 A-section structure enlarged schematic diagram.

[0063] Figure 7 for Figure 5 An enlarged schematic diagram of the structure of part B.

[0064] Figure 8 It is a partial structural cross-sectional schematic diagram of the adjustment part of the present invention.

[0065] Fig. 9 It is a partial structural schematic diagram of the adjustment part of the present invention.

[0066] Fig.10 It is a schematic structural diagram of the mounting block B, the barrier mechanism and the screw moving mechanism of the present invention.

[0067] Fig.11 It is a schematic diagram of the explosion structure of the barrier mechanism of the present invention.

[0068] Description of the numbers in the figure:

[0069] 1. Sliding seat; 2. Test bench; 3. Car body fixture; 4. Mounting block A; 5. Mounting block B; 6. Rotating mechanism; 7. Barrier mechanism; 8. Screw moving mechanism;

[0070] 11. slideway; 12. slider; 13. bottom column; 14. worm gear; 15. top column; 16. worm;

[0071] 41. mounting cavity; 50. mounting slot; 51. jack; 52. latch;

[0072] 61. output unit; 62. linkage unit; 63. power unit; 64. adjustment unit;

[0073] 611, rotating tube; 612, helical gear ring; 613, rotating shaft; 614, helical gear; 615, internal gear ring;

[0074] 620, limit groove B; 621, sleeve; 622, first rotating seat; 623, first gear; 624, second rotating seat A; 625, second gear A; 626, second rotating seat B; 627, second gear B; 628, connecting shaft; 629, limit groove A;

[0075] 631, connecting rod; 632, motor; 633, driving gear; 634, swivel;

[0076] 640, adjusting ring; 641, sub-rod; 642, first engaging toothed ring A; 643, first engaging toothed ring B; 644, second engaging toothed ring A; 645, second engaging toothed ring B; 646, limiting block B; 647, limiting block A; 648, ball block; 649, translation guide groove; 6401, adjusting screw groove;

[0077] 6491, partial thread groove; 6492, limit arc groove;

[0078] 72, connecting block; 73, rotating groove; 74, movable groove; 75, rotating column; 76, movable block; 77, through hole A; 78, through hole B; 79, barrier block;

[0079] 791. Barrier part; 792. Triangular part; 793. Collision cylinder. DETAILED DESCRIPTION

[0080] like Figures 1 to 11 As shown, the present invention relates to a vehicle A-pillar strength collision test device, comprising a slide seat 1, a slide slot 11 is provided at the top of the slide seat 1, a slider 12 is slidably connected to the slide slot 11, a bottom column 13 is rotatably connected to the slider 12, a worm wheel 14 is fixedly provided at the top of the bottom column 13, a top column 15 is fixedly provided at the top of the worm wheel 14, a worm 16 is meshingly connected at both ends of the worm wheel 14, a test bench 2 is fixedly provided at the top of the top column 15, a vehicle shell fixture 3 is arranged on the test bench 2, a mounting block A4 is fixedly provided at the head end of the slide seat 1, a mounting block B5 is fixedly provided at the tail end of the slide seat 1, and two ends of the worm 16 are rotatably connected to the mounting block A4 and the mounting block B5 respectively; a plurality of plug holes 51 are provided at the tail end of the mounting block B5 in a linear equidistant structure, and one of the plug holes 51 is plugged with a latch 52;

[0081] The mounting block A4 is hollow inside to form a mounting cavity 41, and a rotating mechanism 6 is arranged in the mounting cavity 41. The rotating mechanism 6 has two rotating ends, and the two rotating ends are respectively fixedly connected to two worms 16; the mounting block B5 is provided with a mounting groove 50, and a screw moving mechanism 8 is arranged on the mounting groove 50, and a barrier mechanism 7 is arranged at the movable end of the screw moving mechanism 8. The screw moving mechanism 8 of the present invention is a prior art, and the car body clamp 3 is a commonly used fixed clamp for car bodies, which is relatively common in the art, and no further description is given.

[0082] In an embodiment of the present invention, the rotating mechanism 6 includes an output part 61 and a power part 63. The two output parts 61 are symmetrically arranged at both ends of the mounting cavity 41. The two output parts 61 are connected by a linkage part 62. The power part 63 is arranged on the mounting block A4 relative to the linkage part 62. The output end of the power part 63 is connected to the input end of the linkage part 62. An adjustment part 64 is provided on the linkage part 62.

[0083] In an embodiment of the present invention, the output part 61 includes a rotating tube 611 and a rotating shaft 613. The rotating tube 611 is rotatably arranged on the installation cavity 41. A bevel gear ring 612 is fixedly arranged on the surface of the rotating tube 611. The rotating shaft 613 is rotatably arranged at the tail end of the installation cavity 41 relative to the bevel gear ring 612. The tail end of the rotating shaft 613 is fixedly connected to the head end of the worm 16. The rotating end is composed of the rotating shaft 613. A bevel gear 614 is fixedly arranged at the head end of the rotating shaft 613. The bevel gear 614 is meshedly connected with the bevel gear ring 612. An inner gear ring 615 is fixedly arranged at the end of the bevel gear ring 612 away from the rotating shaft 613.

[0084] In the embodiment of the present invention, the linkage part 62 includes a sleeve 621, which is rotatably arranged on the side of the mounting block A4 away from the power part 63. The end of the sleeve 621 close to the power part 63 penetrates into the mounting cavity 41 and is fixedly provided with a first rotating seat 622. The first rotating seat 622 is rotatably connected with a first gear 623. The first gear 623 is meshed with an inner gear ring 615 close to the power part 63. A second rotating seat A624 is fixedly provided on the surface of the sleeve 621 relative to the first gear 623. A second gear A625 is rotatably connected to the second rotating seat A624. The second gear A625 is connected to the first gear. 623 is meshingly connected, a second swivel seat B626 is fixedly provided on the surface of the sleeve 621 relative to the second swivel seat A624, a second gear B627 is rotatably connected to the second swivel seat B626, the second gear B627 is meshingly connected with the inner gear ring 615 away from the power unit 63, and the second gear B627 is fixedly connected with the second gear B627 through a connecting shaft 628, a surface of the sleeve 621 away from the power unit 63 is annularly arranged with a plurality of limit grooves A629 at equal intervals, and a surface of the sleeve 621 relative to the mounting cavity 41 is annularly arranged with a plurality of limit grooves B620 at equal intervals.

[0085] In an embodiment of the present invention, the power unit 63 includes a connecting rod 631 and a motor 632. The connecting rod 631 is rotatably arranged on the mounting cavity 41. The motor 632 is fixedly arranged on the mounting block A4 relative to the connecting rod 631. One end of the connecting rod 631 is fixedly connected to the output shaft of the motor 632. The other end of the connecting rod 631 penetrates into the mounting cavity 41 and is fixedly provided with a driving gear 633. The driving gear 633 is meshedly connected with the first gear 623. The driving gear 633 is rotatably connected with a swivel 634 near one end of the sleeve 621. The swivel 634 is fixedly connected to the sleeve 621.

[0086] In an embodiment of the present invention, the adjusting portion 64 includes a sub-rod 641, a first engaging tooth ring A642, a first engaging tooth ring B643, a second engaging tooth ring A644, a second engaging tooth ring B645 and an adjusting ring 640, the sub-rod 641 is movably arranged in the sleeve 621, the first engaging tooth ring A642 is fixedly arranged at one end of the sub-rod 641 close to the driving gear 633, the first engaging tooth ring B643 is fixedly arranged on the driving gear 633, the first engaging tooth ring A642 is engaged with the first engaging tooth ring B643, the second engaging tooth ring A644 is fixedly arranged on the installation cavity 41, the second engaging tooth ring B645 is sleeved on the sleeve 621, and the second engaging tooth ring B645 and the sub-rod 641 are connected in a ring-shaped manner. A plurality of limit blocks B646 arranged in a symmetrically spaced structure are fixedly connected, and the plurality of limit blocks B646 are respectively slidably connected to the plurality of limit grooves B620; a plurality of limit blocks A647 are fixedly arranged in a ring-shaped symmetrically spaced structure relative to the plurality of limit grooves A629 on the surface of the sub-rod 641; the limit blocks A647 are slidably connected to the limit grooves A629; a ball block 648 is fixedly arranged at the eccentric end of the limit block A647; an adjusting ring 640 is rotatably arranged on the sleeve 621 relative to the plurality of limit grooves A629; a plurality of translation guide grooves 649 are provided in the adjusting ring 640 relative to the plurality of ball blocks 648; the translation guide grooves 649 are movably connected to the ball blocks 648; an adjusting screw groove 6401 is provided on the surface of the adjusting ring 640.

[0087] In the embodiment of the present invention, the translation guide groove 649 includes a partial thread groove 6491, and both ends of the partial thread groove 6491 are provided with a limit arc groove 6492. The present invention, through the structural design of the rotating mechanism 6, allows the hexagonal wrench to be inserted into the adjusting screw groove 6401 and rotated, so that the adjusting ring 640 rotates and drives the translation guide groove 649, so that the ball block 648 moves to the limit arc groove 6492 away from the side of the driving gear 633, and the axial limit of the ball block 648 is completed. At this time, the first engaging tooth ring A642 is disengaged from the first engaging tooth ring B643, and the second engaging tooth ring A644 is engaged with the second engaging tooth ring B645. The output shaft of the motor 632 is controlled to rotate by the external control mechanism, so that the connecting rod 631 drives the driving gear 633 to rotate. Since the first engaging tooth ring A642 is engaged with the first engaging tooth ring B643, the sub-rod 641 Rotate and slide through the limit block A647 and the limit groove A629, and the limit block B646 and the limit groove B620 to cause the sleeve 621 to rotate, so that the driving gear 633, the first gear 623, the second gear A625 and the second gear B627 will not rotate relative to each other, so that the two inner gear rings 615 rotate in the same direction, so that the two helical gear rings 612 rotate in the same direction, so that the two rotating shafts 613 drive the two worms 16 to rotate in the same direction, so that the worm wheel 14 drives the bottom column 13 and the slider 12 to move along the slide groove 11, and the test bench 2 moves accordingly, and the rotation speed of the output shaft of the motor 632 is controlled to control the moving speed of the test bench 2, simulating the driving state of the vehicle;

[0088] Insert the hexagonal wrench into the adjusting screw groove 6401 and rotate it, so that the adjusting ring 640 rotates and drives the translation guide groove 649, so that the ball block 648 moves to the limiting arc groove 6492 on the side away from the driving gear 633, and the axial limiting of the ball block 648 is completed. At this time, the first engaging tooth ring A642 is disengaged from the first engaging tooth ring B643, and the second engaging tooth ring A644 is engaged with the second engaging tooth ring B645. The output shaft of the motor 632 is controlled to rotate by the external control mechanism, so that the connecting rod 631 drives the driving gear 633 to rotate. Since the second engaging tooth ring A644 is engaged with the second engaging tooth ring B645, the sleeve 621 Unable to rotate, the driving gear 633 drives the first gear 623 to rotate, thereby causing the second gear A625 to rotate in the opposite direction relative to the first gear 623, and the second gear A625 drives the second gear B627 to rotate in the opposite direction via the connecting shaft 628, causing the first gear 623 and the second gear B627 to respectively drive the two inner gear rings 615 to rotate, and the two inner gear rings 615 rotate in the opposite direction, thereby causing the two rotating shafts 613 to drive the two worms 16 to rotate in the opposite direction, thereby causing the worm wheel 14 to drive the bottom column 13 to rotate relative to the slider 12, so as to adjust the angle of the test bench 2, which is applied to side impact tests and side column impact tests. Among them, the further design of the translation guide groove 649 ensures that after the adjustment part 64 is adjusted, the limiting arc groove 6492 limits the axial position of the ball block 648 to prevent it from shifting after the second engaging gear ring A644 is engaged with the second engaging gear ring B645 or the second gear A625 is engaged with the first gear 623, thereby ensuring the stability of the linkage part 62 during the linkage process and facilitating adjustment, which is beneficial to improving the test efficiency of the automobile A-pillar strength collision test.

[0089] In the embodiment of the present invention, the barrier mechanism 7 includes a connecting block 72, which is fixed to the movable end of the screw moving mechanism 8. A rotating groove 73 is provided at the top of the connecting block 72, and a movable groove 74 is provided at the bottom of the rotating groove 73. A rotating column 75 is rotatably connected to the rotating groove 73, and a movable block 76 is fixed at the bottom of the rotating column 75. The movable block 76 is movably connected to the movable groove 74. A through hole A77 is provided at the position of the connecting block 72 relative to the insertion hole 51, and a through hole B78 is provided on the rotating column 75 at a position relative to the through hole A77. The through hole A77 and the through hole B78 constitute a plug-in hole, and the pin 52 is plugged into the plug-in hole. A barrier block 79 is fixed at the top of the rotating column 75.

[0090] The barrier block 79 includes a barrier portion 791, a triangular portion 792 is fixedly provided on one side of the barrier portion 791, and a collision cylinder 793 is fixedly provided on one end of the triangular portion 792 away from the barrier portion 791. The present invention further designs the barrier mechanism 7, and uses the barrier portion 791 of the barrier block 79 for frontal collision test, frontal 40% offset collision test, frontal 25% offset collision test, and side collision test, and the collision cylinder 793 is used for side column collision test without replacement, thereby further improving the test efficiency of the automobile A-pillar strength collision test; and by setting the movable block 76 to be movably connected with the movable groove 74, and setting the movable block 76 to a movable angle of 180° in the movable groove 74, it is convenient for workers to adjust the direction of the barrier block 79, saving time, and further improving the test efficiency of the automobile A-pillar strength collision test.

[0091] The method for using the above-mentioned automobile A-pillar strength collision test device comprises the following steps:

[0092] S1. Equipment work;

[0093] Fix the empty car shell on the test bench 2, install necessary external sensors and data acquisition system, and put the dummy into the empty car shell.

[0094] S2, frontal collision debugging;

[0095] S2.1, position adjustment of the barrier block 79;

[0096] According to the frontal collision test, compared with the empty shell position of the car, the movable end of the screw moving mechanism 8 is controlled by an external control mechanism to move, thereby driving the barrier block 79 to move to an appropriate position.

[0097] Rotate the barrier block 79 until one side of the barrier portion 791 is close to the slide seat 1, and insert the latch 52 into the plug-in hole to rotate and fix the structure;

[0098] S2.2, debugging of the rotating mechanism 6;

[0099] Insert the hexagonal wrench into the adjusting screw groove 6401 and rotate it, so that the adjusting ring 640 rotates and drives the translation guide groove 649, so that the ball block 648 moves to the limiting arc groove 6492 close to the side of the driving gear 633, and the axial limiting of the ball block 648 is completed. At this time, the first engaging tooth ring A642 is meshed with the first engaging tooth ring B643, and the second engaging tooth ring A644 is disengaged from the second engaging tooth ring B645;

[0100] S3, strength collision test;

[0101] The output shaft of the motor 632 is controlled to rotate by an external control mechanism, so that the connecting rod 631 drives the driving gear 633 to rotate. Due to the meshing of the first engaging gear ring A642 and the first engaging gear ring B643, the sub-rod 641 rotates and the sliding connection between the limit block A647 and the limit groove A629, and the sliding connection between the limit block B646 and the limit groove B620 causes the sleeve 621 to rotate, so that the driving gear 633, the first gear 623, the second gear A625 and the second gear B627 will not rotate relative to each other, causing the two inner gear rings 615 to rotate in the same direction, and the two bevel gear rings 612 to rotate in the same direction, causing the two rotating shafts 613 to drive the two worms 16 to rotate in the same direction, causing the worm wheel 14 to drive the bottom column 13 and the slider 12 to move along the slide groove 11, and the test bench 2 moves accordingly, and the rotation speed of the output shaft of the motor 632 is controlled to control the moving speed of the test bench 2, so that the empty shell of the car collides with the barrier part 791, simulating the state of a frontal collision of the vehicle.

[0102] S4. Collision result analysis;

[0103] Analyze the collected data to evaluate the strength and structural stability of the A-pillar, as well as the occupant protection effect based on the damage to the dummy;

[0104] S7, 40% frontal offset collision test;

[0105] S7.1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them;

[0106] S7.2. Adjust the position of the barrier block 79 according to the 40% offset frontal collision test as in step S2.1, and perform a 40% offset frontal A-pillar strength collision test as in step S3, and analyze the collision test results as in step S4;

[0107] S8, 25% frontal offset collision test;

[0108] S8.1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them;

[0109] S8.2. Adjust the position of the barrier block 79 according to the 25% offset frontal collision test as in step S2.1, and perform a 40% offset frontal A-pillar strength collision test as in step S3, and analyze the collision test results as in step S4;

[0110] S9, debugging of side impact test;

[0111] S9.1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them;

[0112] S9.2, debugging of the rotating mechanism 6;

[0113] Insert the hexagonal wrench into the adjusting screw groove 6401 and rotate it, so that the adjusting ring 640 rotates and drives the translation guide groove 649, so that the ball block 648 moves to the limiting arc groove 6492 away from the side of the driving gear 633, and the axial limiting of the ball block 648 is completed. At this time, the first engaging tooth ring A642 is disengaged from the first engaging tooth ring B643, and the second engaging tooth ring A644 is engaged with the second engaging tooth ring B645;

[0114] S9.3, debugging of test bench 2;

[0115] The output shaft of the motor 632 is controlled to rotate by an external control mechanism, so that the connecting rod 631 drives the driving gear 633 to rotate. Since the second engaging gear ring A644 is meshed with the second engaging gear ring B645, the sleeve 621 cannot rotate, so that the driving gear 633 drives the first gear 623 to rotate, so that the second gear A625 rotates in the opposite direction relative to the first gear 623, and the second gear A625 drives the second gear B627 to rotate in the opposite direction via the connecting shaft 628, so that the first gear 623 and the second gear B627 respectively drive the two inner gear rings 615 to rotate, and the two inner gear rings 615 rotate in the opposite direction, thereby making the two rotating shafts 613 drive the two worms 16 to rotate in the opposite direction, so that the worm wheel 14 drives the bottom column 13 to rotate relative to the slider 12, until the test bench 2 rotates 90° accordingly;

[0116] S9.4, repeat the adjustment of the rotating mechanism 6 in the same way as step S2.2 until the first engaging toothed ring A642 is meshed with the first engaging toothed ring B643, and the second engaging toothed ring A644 is disengaged from the second engaging toothed ring B645;

[0117] S10, side impact test;

[0118] S10.1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them;

[0119] S10.2, adjusting the position of the barrier block 79 according to the side collision test as in step S2.1, and performing the A-pillar strength test for side collision as in step S3, and analyzing the collision test results as in step S4;

[0120] S11, side column impact test;

[0121] S11.1, position adjustment of the barrier block 79;

[0122] According to the side column collision test, compared with the empty shell position of the car, the movable end of the screw moving mechanism 8 is controlled by an external control mechanism to move, thereby driving the barrier block 79 to move to an appropriate position.

[0123] Rotate the barrier block 79 to one side of the collision cylinder 793 close to the slide seat 1, and use the pin 52 to insert the plug hole to rotate and fix the structure;

[0124] S11.2, debugging of test bench 2;

[0125] After the rotating mechanism 6 is debugged as in step S9.2, the first engaging toothed ring A642 is disengaged from the first engaging toothed ring B643, and the second engaging toothed ring A644 is meshed with the second engaging toothed ring B645. The output shaft of the motor 632 is controlled to rotate by an external control mechanism to rotate the test bench 2, so that a collision angle of 75°±3° is formed between the vertical plane parallel to the vehicle shell vector and the longitudinal center line of the vehicle during the collision. The rotating mechanism 6 is debugged repeatedly as in step S2.2 until the first engaging toothed ring A642 is meshed with the first engaging toothed ring B643, and the second engaging toothed ring A644 is disengaged from the second engaging toothed ring B645.

[0126] S11.3. Perform the A-pillar strength test for side impact as in step S3, and analyze the impact test results as in step S4.

[0127] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A vehicle A-pillar strength collision test device, characterized in that: The invention comprises a slide seat (1), wherein a slide groove (11) is provided at the top of the slide seat (1), a slider (12) is slidably connected to the slide groove (11), a bottom column (13) is rotatably connected to the slider (12), a worm wheel (14) is fixedly provided at the top of the bottom column (13), a top column (15) is fixedly provided at the top of the worm wheel (14), a worm (16) is meshingly connected to the top of the worm wheel (14), a test bench (2) is fixedly provided at the top of the top column (15), a vehicle body fixture (3) is arranged on the test bench (2), a mounting block A (4) is fixedly provided at the head end of the slide seat (1), a mounting block B (5) is fixedly provided at the tail end of the slide seat (1), and two ends of the worm (16) are rotatably connected to the mounting block A (4) and the mounting block B (5) respectively; The mounting block A (4) is hollow inside to form a mounting cavity (41), a rotating mechanism (6) is arranged inside the mounting cavity (41), the rotating mechanism (6) has two rotating ends, and the two rotating ends are respectively fixedly connected to the two worms (16); The mounting block B (5) is provided with a mounting groove (50), a screw moving mechanism (8) is arranged on the mounting groove (50), and a barrier mechanism (7) is arranged at the movable end of the screw moving mechanism (8); The rear end of the mounting block B (5) is provided with a plurality of plug holes (51) in a linear and equidistant structure, wherein one of the plug holes (51) is plugged with a plug pin (52); The rotating mechanism (6) comprises an output part (61) and a power part (63), the two output parts (61) being symmetrically arranged at two ends of the mounting cavity (41), the two output parts (61) being connected via a linkage part (62), the power part (63) being arranged on the mounting block A (4) relative to the linkage part (62), the output end of the power part (63) being connected to the input end of the linkage part (62), and the linkage part (62) being provided with an adjustment part (64); The output portion (61) comprises a rotating tube (611) and a rotating shaft (613); the rotating tube (611) is rotatably mounted on the mounting cavity (41); a helical gear ring (612) is fixedly mounted on the surface of the rotating tube (611); the rotating shaft (613) is rotatably mounted at the rear end of the mounting cavity (41) relative to the helical gear ring (612); the rear end of the rotating shaft (613) is fixedly connected to the front end of the worm (16); the rotating end is formed by the rotating shaft (613); a helical gear (614) is fixedly mounted on the front end of the rotating shaft (613); the helical gear (614) is meshingly connected to the helical gear ring (612); and an inner gear ring (615) is fixedly mounted on one end of the helical gear ring (612) away from the rotating shaft (613); The linkage portion (62) comprises a sleeve (621), the sleeve (621) being rotatably arranged on a side of the mounting block A (4) away from the power portion (63), the sleeve (621) having an end close to the power portion (63) penetrating into the mounting cavity (41) and being fixedly provided with a first rotating seat (622), the first rotating seat (622) being rotatably connected with a first gear (623), the first gear (623) being meshingly connected with the inner gear ring (615) close to the power portion (63), a second rotating seat A (624) being fixedly provided on the surface of the sleeve (621) at a position opposite to the first gear (623), the second rotating seat A (624) being rotatably connected with a second gear A (625), the second gear A (625) being meshingly connected with the first gear ring (615) The second rotating seat B (626) is fixedly provided on the surface of the sleeve (621) at a position relative to the second rotating seat A (624); a second gear B (627) is rotatably connected to the second rotating seat B (626); the second gear B (627) is meshedly connected to the inner gear ring (615) away from the power part (63); the second gear A (625) and the second gear B (627) are fixedly connected via a connecting shaft (628); a plurality of limiting grooves A (629) are formed in an annular structure with equal spacing on the surface of the sleeve (621) at a side away from the power part (63); and a plurality of limiting grooves B (620) are formed in an annular structure with equal spacing on the surface of the sleeve (621) at a position relative to the installation cavity (41); The power unit (63) comprises a connecting rod (631) and a motor (632), wherein the connecting rod (631) is rotatably mounted on the mounting cavity (41), and the motor (632) is fixedly mounted on the mounting block A (4) at a position relative to the connecting rod (631). One end of the connecting rod (631) is fixedly connected to an output shaft of the motor (632), and the other end of the connecting rod (631) penetrates into the mounting cavity (41) and is fixedly provided with a driving gear (633), wherein the driving gear (633) is meshingly connected to the first gear (623), and a rotating ring (634) is rotatably connected to one end of the driving gear (633) close to the sleeve (621), and the rotating ring (634) is fixedly connected to the sleeve (621); The adjusting portion (64) comprises a sub-rod (641), a first engaging toothed ring A (642), a first engaging toothed ring B (643), a second engaging toothed ring A (644), a second engaging toothed ring B (645) and an adjusting ring (640); the sub-rod (641) is movably arranged in the sleeve (621); the first engaging toothed ring A (642) is fixedly arranged at one end of the sub-rod (641) close to the driving gear (633); the first engaging toothed ring B (643) is fixedly arranged on the driving gear (633); the first engaging toothed ring A (642) is engaged with the first engaging toothed ring B (643); the second engaging toothed ring A (644) is fixedly arranged on the mounting cavity (41); the second engaging toothed ring B (645) is sleeved on the sleeve (621); the second engaging toothed ring B (645) and the sub-rod (641) are connected by an annular equal spacing. A plurality of limit blocks B (646) arranged in a distance structure are fixedly connected, and the plurality of limit blocks B (646) are respectively slidably connected to the plurality of limit grooves B (620); a plurality of limit blocks A (647) are fixedly arranged on the surface of the sub-rod (641) in a ring-shaped and equidistant structure relative to the plurality of limit grooves A (629); the limit blocks A (647) are slidably connected to the limit grooves A (629); a ball block (648) is fixedly arranged on the eccentric end of the limit block A (647); the adjustment ring (640) is rotatably arranged on the sleeve (621) relative to the plurality of limit grooves A (629); a plurality of translation guide grooves (649) are opened in the adjustment ring (640) relative to the plurality of ball blocks (648); the translation guide grooves (649) are movably connected to the ball blocks (648); and an adjustment screw groove (6401) is opened on the surface of the adjustment ring (640); The translation guide groove (649) comprises a partial thread groove (6491), and both ends of the partial thread groove (6491) are provided with limiting arc grooves (6492).

2. The automobile A-pillar strength collision test device according to claim 1, characterized in that: The barrier mechanism (7) comprises a connecting block (72), the connecting block (72) being fixedly arranged at the movable end of the screw moving mechanism (8), the top end of the connecting block (72) being provided with a rotating groove (73), the bottom end of the rotating groove (73) being provided with a movable groove (74), the rotating groove (73) being rotatably connected with a rotating column (75), the bottom end of the rotating column (75) being fixedly provided with a movable block (76), the movable block (76) being movably connected with the movable groove (74), the connecting block (72) being provided with a through hole (77) at a position relative to the plug hole (51), the rotating column (75) being provided with a through hole (78) at a position relative to the through hole A (77), the through hole A (77) and the through hole B (78) forming a plug hole, the latch (52) being plug-fitted with the plug hole, and the top end of the rotating column (75) being provided with a barrier block (79); The barrier block (79) comprises a barrier portion (791), a triangular portion (792) is fixedly provided on one side of the barrier portion (791), and a collision cylinder (793) is fixedly provided on one end of the triangular portion (792) away from the barrier portion (791).

3. The method for using the automobile A-pillar strength collision test device according to claim 2, characterized in that: The following steps are involved: S1. Equipment work; Fix the empty shell of the car on the test bench (2), install external sensors and a data acquisition system, and place a dummy into the empty shell of the car; S2, frontal collision debugging; S2.1, adjusting the position of the barrier block (79); According to the frontal collision test, compared with the position of the empty shell of the car, the movable end of the screw moving mechanism (8) is controlled by the external control mechanism to move, thereby driving the barrier block (79) to move to an appropriate position; Rotate the barrier block (79) until one side of the barrier portion (791) is close to the slide seat (1), and insert the latch (52) into the insertion hole; S2.2, debugging of the rotating mechanism (6); Insert a hexagonal wrench into the adjusting screw groove (6401) and rotate it, so that the adjusting ring (640) rotates and drives the translation guide groove (649) to rotate, so that the ball block (648) moves to the limiting arc groove (6492) close to the side of the driving gear (633), and the axial limiting of the ball block (648) is completed. At this time, the first engaging toothed ring A (642) is meshed with the first engaging toothed ring B (643), and the second engaging toothed ring A (644) is disengaged from the second engaging toothed ring B (645); S3, strength collision test; The output shaft of the motor (632) is controlled to rotate by an external control mechanism, so that the connecting rod (631) drives the driving gear (633) to rotate. Since the first engaging toothed ring A (642) is meshed with the first engaging toothed ring B (643), the sub-rod (641) rotates and the sleeve (621) rotates through the sliding connection between the limit block A (647) and the limit groove A (629), and the sliding connection between the limit block B (646) and the limit groove B (620), so that the driving gear (633), the first gear (623), the second gear A (625) and the The second gear B (627) will not rotate relative to each other, causing the two inner gear rings (615) to rotate in the same direction, causing the two helical gear rings (612) to rotate in the same direction, causing the two rotating shafts (613) to drive the two worms (16) to rotate in the same direction, causing the worm wheel (14) to drive the bottom column (13) and the slider (12) to move along the slide groove (11), and the test bench (2) to move accordingly, and controlling the rotation speed of the output shaft of the motor (632) to control the moving speed of the test bench (2), so that the empty shell of the car collides with the barrier part (791), simulating the state of a frontal collision of the vehicle; S4. Collision result analysis; Analyze the collected data to evaluate the strength and structural stability of the A-pillar, and determine the occupant protection effect based on the damage to the dummy; S7, 40% frontal offset collision test; S7.

1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them; S7.2, adjusting the position of the barrier block (79) according to the 40% offset frontal collision test in the same manner as in step S2.1, and performing a 40% offset frontal A-pillar strength collision test in the same manner as in step S3, and analyzing the collision test results in the same manner as in step S4; S8, 25% frontal offset collision test; S8.

1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them; S8.2, adjusting the position of the barrier block (79) according to the 25% offset frontal collision test as in step S2.1, and performing a 40% offset frontal A-pillar strength collision test as in step S3, and analyzing the collision test results as in step S4; S9, debugging of side impact test; S9.

1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them; S9.2, commissioning of the rotating mechanism (6); Insert a hexagonal wrench into the adjusting screw groove (6401) and rotate it, so that the adjusting ring (640) rotates and drives the translation guide groove (649) to rotate, so that the ball block (648) moves to the limiting arc groove (6492) on the side away from the driving gear (633), and the axial limiting of the ball block (648) is completed. At this time, the first engaging tooth ring A (642) is disengaged from the first engaging tooth ring B (643), and the second engaging tooth ring A (644) is meshed with the second engaging tooth ring B (645); S9.3, commissioning of the test bench (2); The output shaft of the motor (632) is controlled to rotate by an external control mechanism, so that the connecting rod (631) drives the driving gear (633) to rotate. Since the second engaging toothed ring A (644) is meshed with the second engaging toothed ring B (645), the sleeve (621) cannot rotate, so that the driving gear (633) drives the first gear (623) to rotate, thereby causing the second gear A (625) to rotate in the opposite direction relative to the first gear (623). The second gear A (625) drives the second gear B (627) to rotate in the opposite direction via the connecting shaft (628), so that the first gear (623) and the second gear B (627) respectively drive the two inner toothed rings (615) to rotate, and the two inner toothed rings (615) rotate in the opposite direction, thereby causing the two rotating shafts (613) to drive the two worms (16) to rotate in the opposite direction, so that the worm wheel (14) drives the bottom column (13) to rotate relative to the slider (12), until the test bench (2) rotates 90 degrees accordingly; S9.

4. Repeat the adjustment of the rotating mechanism (6) in the same manner as in step S2.2 until the first engaging toothed ring A (642) is meshed with the first engaging toothed ring B (643), and the second engaging toothed ring A (644) is disengaged from the second engaging toothed ring B (645); S10, side impact test; S10.

1. Decide whether to replace the empty car shell and the dummy based on the damage to the empty car shell and the dummy. If the empty car shell and the dummy are seriously damaged, replace them; S10.2, adjusting the position of the barrier block (79) according to the side impact test in the same manner as in step S2.1, and performing a side impact A-pillar strength test in the same manner as in step S3, and analyzing the impact test results in the same manner as in step S4; S11, side column impact test; S11.1, adjusting the position of the barrier block (79); According to the side column collision test, compared with the position of the empty shell of the car, the movable end of the screw moving mechanism (8) is controlled by the external control mechanism to move, thereby driving the barrier block (79) to move to an appropriate position; Rotate the barrier block (79) until one side of the collision cylinder (793) is close to the slide seat (1), and use the latch (52) to insert it into the insertion hole; S11.2, commissioning of the test bench (2); After debugging the rotating mechanism (6) in the same manner as in step S9.2, the first engaging toothed ring A (642) is disengaged from the first engaging toothed ring B (643), and the second engaging toothed ring A (644) is meshed with the second engaging toothed ring B (645). The output shaft of the motor (632) is controlled to rotate by an external control mechanism so that the test bench (2) is rotated so that a collision angle of 75°±3° is formed between a vertical plane parallel to the vehicle shell vector and the longitudinal center line of the vehicle during a collision. The rotating mechanism (6) is repeatedly debugged in the same manner as in step S2.2 until the first engaging toothed ring A (642) is meshed with the first engaging toothed ring B (643), and the second engaging toothed ring A (644) is disengaged from the second engaging toothed ring B (645); S11.

3. Perform the A-pillar strength test for side impact as in step S3, and analyze the impact test results as in step S4.

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