A test bed for automobile rollover crash test

Abstract

The present application relates to the technical field of collision test, in particular to a test bed for automobile rollover collision test, which comprises a base, a sliding table, a rack, the base is slidably connected with the sliding table, the base is provided with the rack, the rack comprises left and right upright columns which are symmetrically arranged and respectively located on both sides of the sliding table, a rotating arm is arranged between the left and right upright columns, sliding block seats are respectively slidably connected with the left and right upright columns, the rotating arm is supported on the sliding block seats, a rotating motor is arranged on the sliding block seats and is in transmission connection with the rotating arm, the upper ends of the left and right upright columns are connected through a motor mounting frame, a lifting motor is arranged on the motor mounting frame and is in transmission connection with a transmission shaft, the transmission shaft is connected with the sliding block seat of the left upright column through a first chain transmission mechanism, and the transmission shaft is connected with the sliding block seat of the right upright column through a second chain transmission mechanism. The problem that the vertical speed is difficult to control in the existing rollover collision test, resulting in poor repeatability and poor reliability of test results, is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crash test, in particular to a test bed for automobile rollover crash test. BACKGROUND

[0002] Currently, the main test methods for simulating automobile rollover accidents include roof crush test, trolley drum type rollover test and repeatable rollover test, etc. The roof crush test is mainly used to measure the pressure resistance of the roof of the automobile under quasi-static conditions. Although this method can provide important information about the structural strength of the roof, it cannot truly reproduce the dynamic collision process between the roof and the ground in a rollover accident. Therefore, it cannot comprehensively evaluate the safety of the vehicle in an actual rollover accident. The trolley drum type rollover test attempts to make up for the above shortcomings by simulating the rollover process of the vehicle under certain conditions, but there is still a big difference between the simulated vehicle motion mode and the actual rollover accident, which can only represent a very limited type of rollover. In addition, since the motion trajectory of the vehicle is uncontrollable during the test, the repeatability of this method is poor, which limits its application value in scientific research and technical verification. Repeatable rollover tests, such as CRIS (Controllable Rollover System) and JRS (Jordan Rollover Crash System), simulate the vehicle rotation process in a rollover accident through a spinning mechanism, and at the same time make the test vehicle impact the test platform at a certain speed in the vertical direction during the rollover process, thereby completing the simulation of the rollover accident. Currently, in the rollover test, the test vehicle is usually set at a certain height before the test, and the test vehicle is made to free fall to meet the requirement of vertical speed during the test. This way of applying vertical speed is accidental, which is not conducive to the repeatability of the rollover test, and the vertical speed is difficult to control, which cannot be applied to all working conditions, and there are limitations in safety evaluation, thereby affecting the reliability of the rollover test results. Therefore, the existing rollover test bed still has significant deficiencies in vertical speed control and test repeatability, and needs to be further optimized and improved. SUMMARY

[0003] The present application aims to provide a test bed for automobile rollover crash test to solve the problem of poor repeatability and poor reliability of test results caused by the difficulty in controlling the vertical speed of the existing rollover crash test.

[0004] To achieve the above object, the application adopts the following technical scheme: a test bed for automobile rollover crash test, comprising a base, a sliding table, a rack, the base is slidably connected with the sliding table, the base is provided with the rack, the rack comprises left and right vertical columns symmetrically arranged and respectively located on both sides of the sliding table, a rotating arm is arranged between the left and right vertical columns, a sliding block seat is slidably connected on the left and right vertical columns, the rotating arm is supported on the sliding block seat at both ends, a rotating motor is arranged on the sliding block seat, the rotating motor is in transmission connection with the rotating arm, the upper ends of the left and right vertical columns are connected through a motor mounting frame, a lifting motor is arranged on the motor mounting frame, the lifting motor is in transmission connection with a transmission shaft, the transmission shaft is connected with the sliding block seat of the left vertical column through a first chain transmission mechanism, and the transmission shaft is connected with the sliding block seat of the right vertical column through a second chain transmission mechanism.

[0005] The working principle and beneficial effects of the scheme are as follows: the base, the sliding table and the rack and other components are designed in a modular manner, facilitating installation, disassembly and maintenance, the left and right vertical columns are symmetrically arranged, ensuring the stability and balance of the test bed, the sliding table can slide on the base to simulate the lateral movement of the vehicle during the rolling process, improving the authenticity of the test, the sliding block seat can slide on the vertical column to facilitate the adjustment of the height of the rotating arm, adapting to different vehicle models and test requirements, and the sliding fit design reduces the complex mechanical structure and reduces the failure rate, the rotating motor installed on the sliding block seat drives the rotating arm, which can realize accurate angle adjustment and rolling control of the vehicle, and the power of the lifting motor is transmitted to the sliding block seats on both sides through the chain transmission mechanism, the lifting motor drives the sliding block seat to move up and down through the transmission shaft and the chain transmission mechanism, realizing accurate adjustment of the height of the rotating arm, and the left vertical column and the right vertical column are connected through the first chain transmission mechanism and the second chain transmission mechanism respectively, ensuring the synchronous movement of the left and right sides, avoiding tilting or imbalance, the height of the rotating arm can be flexibly adjusted through the lifting motor and the chain transmission mechanism, adapting to the rollover test requirements of different vehicle models, the rotating motor and the lifting motor realize automatic control, the operation is simple, and manual intervention is reduced, the chain transmission mechanism has simple structure, convenient maintenance and high transmission efficiency.

[0006] Preferably, a left guide column and a right guide column are respectively arranged on both sides of the sliding table, the left guide column and the right guide column are connected with the motor mounting frame at the upper end, the left guide column is slidably connected with the first guide block, the right guide column is slidably connected with the second guide block, the first guide block is fixedly connected with the sliding block seat on the left vertical column, and the second guide block is fixedly connected with the sliding block seat on the right vertical column. By introducing the guide column and the guide block, the structural rigidity of the whole system is further enhanced, and the guide system can assist the chain transmission mechanism to realize the synchronous lifting of the left and right sliding block seats, prevent the inclination problem caused by uneven unilateral load or mechanical error, maintain the horizontal state of the rotating arm, ensure the correct posture of the vehicle in the rolling process, reduce the vibration or deviation caused by external force, and ensure the accuracy and reliability of the test data; the design of the guide column and the guide block makes the up-down movement of the sliding block seat more accurate and stable, the enhanced structural stability and motion accuracy not only improve the test quality, but also increase the operation safety, effectively prevent accidents; the sliding fit between the guide column and the guide block provides a smooth motion path, reduces friction and wear, and helps to prolong the service life of the key components, reduces the maintenance cost and frequency.

[0007] Preferably, the lifting motor and the transmission shaft are connected through a reduction mechanism. The high-speed low-torque output of the lifting motor is converted into low-speed high-torque output through the reduction mechanism, and the increased torque can more effectively drive the heavier load, which helps to improve the control accuracy of the system and ensure the smooth and reliable movement of the sliding block seat and its related components; the reduction mechanism can provide more stable power output, reduce speed fluctuations and potential vibration, and enhance the stability of the whole equipment operation.

[0008] Further preferably, the reduction mechanism comprises a third driving wheel, a third driven wheel and a third transmission chain, the diameter of the third driving wheel is smaller than that of the third driven wheel, the third driving wheel is arranged on the motor shaft of the lifting motor, the third driven wheel is arranged on the transmission shaft, and the third driving wheel and the third driven wheel are connected through the third transmission chain. The chain transmission can bear higher load while ensuring high efficiency, ensure the effective transmission of power, reduce energy loss, and according to different requirements, the reduction ratio can be adjusted by changing the diameter ratio of the driving wheel and the driven wheel to meet the speed and torque requirements under different test conditions, and provide greater operation flexibility.

[0009] Preferably, the first chain transmission mechanism comprises a first driving wheel, a first guide wheel, a first driven wheel, a first fixed wheel, a first tension wheel shaft, a first tension wheel and a first transmission chain, the first driving wheel is arranged on the transmission shaft, the first guide wheel is installed on the slider seat of the left stand column and moves along the first transmission chain to drive the slider seat on the left stand column to slide on the left stand column, the first driven wheel is installed on the left stand column below the slider seat, the first fixed wheel is installed on the motor mounting frame above the slider seat of the left stand column, the first tension wheel shaft is supported on the motor mounting frame below the side of the first fixed wheel, the first tension wheel is installed on the first tension wheel shaft, and the first transmission chain is installed on the first driving wheel, the first guide wheel, the first driven wheel, the first fixed wheel and the first tension wheel.

[0010] Preferably, the second chain transmission mechanism comprises a second driving wheel, a second guide wheel, a second driven wheel, a second fixed wheel, a second tension wheel shaft, a second tension wheel and a second transmission chain, the second driving wheel is arranged on the transmission shaft, the second guide wheel is installed on the slider seat of the right stand column and moves along the second transmission chain to drive the slider seat on the right stand column to slide on the right stand column, the second driven wheel is installed on the right stand column below the slider seat, the second fixed wheel is installed on the motor mounting frame above the slider seat of the right stand column, the second tension wheel shaft is supported on the motor mounting frame below the side of the second fixed wheel, the second tension wheel is installed on the second tension wheel shaft, and the second transmission chain is installed on the second driving wheel, the second guide wheel, the second driven wheel, the second fixed wheel and the second tension wheel.

[0011] Both the first and second chain transmission mechanisms adopt a multi-wheel system, which ensures that the power can be efficiently transmitted from the transmission shaft to the slider seat, more accurately adjusts the position of the slider seat, the chain is guided and supported at multiple points, reduces the deviation during operation and helps to improve the response speed and operation efficiency of the overall system; through the fixed wheel and the tension wheel, not only helps to maintain the proper tension of the chain, reduces the slipping or tooth skipping phenomenon caused by relaxation, but also effectively disperses the pressure borne by the chain, thereby prolonging the service life of the chain and improving the reliability and stability of the system.

[0012] Preferably, it further comprises a sliding table driving device, the sliding table driving device comprises a cylinder and a brake pad, the base is provided with a guide rail, the sliding table slides on the base through the guide rail, and the brake pad is arranged on the guide rail. The guide rail can provide accurate guidance for the sliding table, ensure that the sliding table moves smoothly and linearly along the predetermined path, reduce the shaking or deviation of the sliding table during movement, and improve the stability and reliability of the entire system.

[0013] Preferably, when the sliding table driving device loads a sine wave on the sliding table, the sliding table emission time expression is as follows:

[0014]

[0015] In the formula, T1 is the launch time of the slide table when the sine wave is used, v z is the vertical speed of the test vehicle corresponding to the current test condition, a z is the vertical acceleration of the test vehicle corresponding to the current test condition, and σ is a period correction coefficient.

[0016] According to the test condition and the loading waveform, the launch time of the slide table is calculated, which helps to ensure the consistency of each test condition, thereby reducing the error caused by improper variable control, and improving the reliability and repeatability of experimental data.

[0017] Further preferably, when the slide table driving device loads the trapezoidal wave to the slide table, the launch time of the slide table is expressed as follows:

[0018]

[0019] In the formula, T2 is the launch time of the slide table when the trapezoidal wave is used, v z is the vertical speed of the test vehicle corresponding to the current test condition, a z is the vertical acceleration of the test vehicle corresponding to the current test condition, v x is the collision speed of the slide table corresponding to the current test condition, and a x is the collision speed of the slide table corresponding to the current test condition.

[0020] According to the specific test requirements, the relevant waveforms are adjusted, and the launch time of the slide table calculated based on specific parameters is used, which not only enables the test vehicle to have a preset vertical speed and a slide table collision with a corresponding horizontal speed, but also improves the accuracy and effect of the roll-over collision test, enhances the safety and flexibility of the entire test process, and can shorten unnecessary waiting time as much as possible under the premise of ensuring the quality of the experiment, and improves the efficiency of the entire test process.

[0021] Further preferably, during the test, the height between the slide block seat and the slide table surface satisfies the following relationship:

[0022]

[0023] In the formula, h is the height between the slide block seat and the slide table surface, v z is the vertical speed of the test vehicle corresponding to the current test condition, a z is the vertical acceleration of the test vehicle corresponding to the current test condition.

[0024] By accurately calculating the falling height of the test vehicle, not only the vertical direction speed is accurately controlled, which helps to improve the quality of experimental data and provide more accurate basic information for subsequent data analysis, but also the number of unnecessary repeated tests is reduced, time and cost are saved, at the same time, reasonable parameter setting is also helpful to optimize the use efficiency of energy and other resources, and realize the best allocation of resources. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is an isometric view of the present application;

[0026] Figure 2 is Figure 1 is an enlarged view of A in the figure;

[0027] Figure 3 is a top view of the present application;

[0028] Figure 4 is a front view of the present application;

[0029] Figure 5 is a right view of the present application;

[0030] Figure 6 is Figure 5 is an A-A sectional view.

[0031] The marks in the drawings of the specification include: sliding table 1, rack 2, left stand column 21, right stand column 22, left guide column 23, right guide column 24, left support column 25, right support column 26, transmission shaft 3, rotary motor 4, input shaft 41, sliding block seat 5, first guide block 51, second guide block 52, connecting piece 6, rotary arm 7, lifting motor 8, third driving wheel 81, third driven wheel 82, third transmission chain 83, first driving wheel 91, first guide wheel 97, first driven wheel 92, first fixed wheel 93, first tension wheel shaft 94, first tension wheel 95, first transmission chain 96, second driving wheel 11, second guide wheel 17, second driven wheel 12, second fixed wheel 13, second tension wheel shaft 14, second tension wheel 15, second transmission chain 16, air cylinder 10. DETAILED DESCRIPTION

[0032] Further details are described below through specific embodiments: refer to Figures 1 to 6A test bed for automobile rollover crash test, comprising a base, a sliding table 1, a rack 2. The base is provided with a sliding groove, and the groove is provided with a guide rail. The sliding table 1 slides on the base through the guide rail. The sliding table 1 driving device comprises a cylinder 10 and a brake pad. The cylinder 10 is located in the sliding groove, and the brake pad is arranged on the guide rail. The base is provided with the rack 2, which comprises left and right vertical columns 21 and 22 arranged symmetrically and located on both sides of the sliding table 1. A rotating arm 7 is arranged between the left and right vertical columns 21 and 22. The left and right vertical columns 21 and 22 are respectively slidably connected with slide block seats 5, and the rotating arm 7 is supported at both ends of the slide block seats 5. A rotating motor 4 is arranged on the slide block seat 5, and the rotating motor 4 is in transmission connection with the rotating arm 7. A connecting piece 6 is arranged between the rotating arm 7 and the rotating motor 4. The connecting piece 6 is provided with a plurality of mounting holes, including first and second mounting holes. The first mounting hole is used for mounting the rotating arm 7. The shaft of the rotating motor 4 is fixedly connected with one end of an input shaft 41. The other end of the input shaft 41 penetrates through the slide block and is mounted on the second mounting hole of the connecting piece 6. The first and second mounting holes have the same structure. The cross section of the input shaft 41 is T-shaped. The T-shaped head extends into the second mounting hole for fixation, and the T-shaped tail penetrates through the slide block seat and is fixedly connected with the rotating motor 4. The T-shaped head has the same structure as the end of the rotating arm. The rotating arm and the rotating motor realize power transmission through the connecting piece. By mounting the rotating arm and the rotating motor in different mounting holes, the rotation center during automobile test can be adjusted, and it is suitable for different vehicle models and working conditions. A plurality of test vehicle mounting holes are arranged on the rotating arm 7 for mounting the test vehicle. The upper ends of the left and right vertical columns 21 and 22 are connected through a motor mounting frame. A lifting motor 8 is arranged on the motor mounting frame. The lifting motor 8 is in transmission connection with a transmission shaft 3. The transmission shaft 3 is connected with the slide block seat 5 of the left vertical column 21 through a first chain transmission mechanism. The transmission shaft 3 is connected with the slide block seat 5 of the right vertical column 22 through a second chain transmission mechanism.

[0033] The left and right guide columns 23 and 24 are respectively located on both sides of the sliding table 1. The upper ends of the left and right guide columns 23 and 24 are connected with the motor mounting frame. The left guide column 23 is slidably connected with a first guide block 51, and the right guide column 23 is slidably connected with a second guide block 52. The first guide block 51 is fixedly connected with the slide block seat 5 on the left vertical column 21. The second guide block 52 is fixedly connected with the slide block seat 5 on the right vertical column 22.

[0034] The left support column 25 and the right support column 26 are respectively arranged on the two sides of the sliding table 1, and the upper ends of the left support column 25 and the right support column 26 are connected with the motor mounting frame. The support columns can significantly improve the rigidity and stability of the entire test bench frame, and help to disperse and bear the weight from the sliding block seat, the rotating arm and the tested vehicle, thereby improving the load capacity of the entire system. In particular, when performing high-impact or high-speed rollover tests, stronger structural support can effectively reduce system vibration and shaking, ensure stable operation of the equipment, and by providing additional support points, the support columns can help maintain the stability of the sliding block seat and its related components during movement, improve the motion accuracy during the entire test process, and thereby improve the accuracy and reliability of the test results.

[0035] The left upright column 21 is located between the left guide column 23 and the left support column 25, and the left upright column 21 is connected with the left guide column 23 and the left support column 25 through a cross beam. The right upright column 22 is located between the right guide column 24 and the right support column 26, and the right upright column 22 is connected with the right guide column 24 and the right support column 26 through a cross beam.

[0036] The lifting motor 8 is connected with the transmission shaft 3 through a speed reduction mechanism. The speed reduction mechanism includes a third driving wheel 81, a third driven wheel 82 and a third transmission chain 83. The diameter of the third driving wheel 81 is smaller than that of the third driven wheel 82. The third driving wheel 81 is arranged on the motor shaft of the lifting motor 8, and the third driven wheel 82 is arranged on the transmission shaft 3. The third driving wheel 81 and the third driven wheel 82 are connected through the third transmission chain 83.

[0037] The first chain transmission mechanism comprises a first driving wheel 91, a first guide wheel 97, a first driven wheel 92, a first fixed wheel 93, a first tension wheel 95, a first tension wheel shaft 94, a first tension wheel 95, and a first transmission chain 96. The first driving wheel 91 is arranged on the transmission shaft 3. The first guide wheel 97 is installed on the sliding block seat 5 of the left stand column 21 and moves along the first transmission chain 96 to drive the sliding block seat 5 on the left stand column 21 to slide on the left stand column 21. The first driven wheel 92 is installed on the left stand column 21 below the sliding block seat 5. The first fixed wheel 93 is installed on the motor mounting frame above the sliding block seat 5 of the left stand column 21. The first tension wheel 95 and the first tension wheel shaft 94 are supported on the motor mounting frame below the side of the first fixed wheel 93. The first tension wheel 95 is installed on the first tension wheel 95 and the first tension wheel shaft 94. The first transmission chain 96 is installed on the first driving wheel 91, the first guide wheel 97, the first driven wheel 92, the first fixed wheel 93, and the first tension wheel 95. The second chain transmission mechanism comprises a second driving wheel 11, a second guide wheel 17, a second driven wheel 12, a second fixed wheel 13, a second tension wheel 15, a second tension wheel shaft 14, a second tension wheel 15, and a second transmission chain 16. The second driving wheel 11 is arranged on the transmission shaft 3. The second guide wheel 17 is installed on the sliding block seat 5 of the right stand column 22 and moves along the second transmission chain 16 to drive the sliding block seat 5 on the right stand column 22 to slide on the right stand column 22. The second driven wheel 12 is installed on the right stand column 22 below the sliding block seat 5. The second fixed wheel 13 is installed on the motor mounting frame above the sliding block seat 5 of the right stand column 22. The second tension wheel 15 and the second tension wheel shaft 14 are supported on the motor mounting frame below the side of the second fixed wheel 13. The second tension wheel 15 is installed on the second tension wheel 15 and the second tension wheel shaft 14. The second transmission chain 16 is installed on the second driving wheel 11, the second guide wheel 17, the second driven wheel 12, the second fixed wheel 13, and the second tension wheel 15.

[0038] When the test is performed, the height between the sliding block seat and the sliding table top satisfies the following relationship:

[0039]

[0040] In the formula, h is the height between the sliding block seat and the sliding table top, v z is the vertical speed of the test vehicle corresponding to the current test condition; a z is the vertical acceleration of the test vehicle corresponding to the current test condition.

[0041] The waveform of the sliding table loading can be a sine wave or a trapezoidal wave. In this embodiment, a sine wave is adopted, and in another embodiment, a trapezoidal wave is adopted.

[0042] Preferably, when the slide table driving device loads the slide table with a sine wave, the slide table launch time is expressed as follows:

[0043]

[0044] In the formula, T1 is the slide table launch time when the sine wave, v z is the current test condition corresponding to the test vehicle collision vertical speed, a z is the current test condition corresponding to the test vehicle collision vertical acceleration, and σ is the period correction coefficient.

[0045] Preferably, when the slide table driving device loads the slide table with a trapezoidal wave, the slide table launch time is expressed as follows:

[0046]

[0047] In the formula, T2 is the slide table launch time when the trapezoidal wave, v z is the current test condition corresponding to the test vehicle collision vertical speed, a z is the current test condition corresponding to the test vehicle collision vertical acceleration, v x is the current test condition corresponding to the slide table collision speed, and a x is the current test condition corresponding to the slide table collision speed.

[0048] Preferably, the torque of the lifting motor in the test has the following relationship:

[0049] T z = μ (a z -g) mR 81

[0050] In the formula, T z is the torque of the lifting motor, m is the overall mass of the rotating arm, the vehicle body and the dummy in the test, R 81 is the gear major diameter of the third driving wheel, g is the acceleration of gravity, μ is the friction correction coefficient, and a z is the current test condition corresponding to the test vehicle collision vertical acceleration.

[0051] Before the test, according to the test vehicle collision vertical speed v z , the test vehicle collision vertical acceleration a z , the slide table collision speed v x , the slide table collision speed a x , and the test vehicle collision rotational speed required by the current condition of the roll-over collision test, the test configuration parameters are determined, which include the test vehicle falling height, the rotating motor speed, the slide table launch time, the test vehicle falling time, and the slide table test waveform. Also included are the test vehicle itself parameters (i.e. the overall mass m), the test vehicle collision vertical acceleration a zThe major diameter of the motor gear, i.e., the major diameter R of the third driving gear. 81 Calculate the lifting motor torque T during the test. z .

[0052] In this embodiment, the overall mass m of the rotating arm, vehicle body, and dummy is 1.2t, the friction correction coefficient is 1.05, the major diameter of the motor gear is 0.5m, and the vertical collision velocity v of the test vehicle corresponding to the current test condition is... z The vertical acceleration a of the test vehicle under the current test conditions is 6 m / s². z 12m / s 2 , where is the collision velocity 'a' of the slide table under the current test conditions. x The value is 20g, and the corresponding sliding table collision velocity v under the current test conditions is... x The test speed was 50 km / h, and the test vehicle rotation speed was 200° / s. The test configuration parameters calculated by the above method were as follows: the height between the slider seat and the slide table surface was 1.5 m, the rotation motor speed was 200° / s, the lifting motor torque was 1890 Nm, the launch time of the trapezoidal wave slide table was 445 ms, the launch time of the sine wave was 391 ms, and the test vehicle descent time was 0 ms.

[0053] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A test rig for a car rollover crash test, characterised in that: The utility model provides a lifting platform, including base, sliding platform, rack, the base is combined with sliding platform on the sliding, the base is provided with rack, the rack includes symmetrically arranged left stand, right stand, is located sliding platform both sides respectively, is provided with a rotating arm between left stand, right stand, the sliding block seat is combined on left stand, right stand respectively, and the both ends of rotating arm are supported on the sliding block seat, the sliding block seat is equipped with rotating motor, and rotating motor is connected with rotating arm transmission, the upper end of left stand, right stand is connected through motor mounting frame, the motor mounting frame is equipped with lifting motor, lifting motor is connected with a transmission shaft transmission, and the transmission shaft is connected through first chain transmission mechanism between left stand's sliding block seat, and the transmission shaft is connected through second chain transmission mechanism between right stand's sliding block seat, Lifting motor and transmission shaft are connected through speed reduction mechanism, Speed reduction mechanism includes third driving wheel, third driven wheel, third transmission chain, the diameter of third driving wheel is less than third driven wheel, third driving wheel sets up on the motor shaft of lifting motor, third driven wheel sets up on transmission shaft, and third driving wheel is connected through third transmission chain between third driven wheel, The torque of lifting motor in test exists following relation: In the formula, is the torque of the lifting motor, m is the total mass of the rotating arm, the vehicle body and the dummy in the test, is the gear diameter of the third driving wheel, g is the acceleration of gravity, is the friction correction coefficient, is the vertical acceleration of the test vehicle corresponding to the current test condition; When carrying out test, the height between sliding block seat and sliding platform table surface satisfies following relation: In the formula, h is the height between the slider seat and the slide table top, is the test vehicle collision vertical velocity corresponding to the current test working condition; is the test vehicle collision vertical acceleration corresponding to the current test working condition. Still include sliding platform drive arrangement, the sliding platform drive arrangement includes cylinder, brake block, the base is equipped with guide rail, the sliding platform is slid on the base through guide rail, and brake block sets up on guide rail.

2. The test rig for a car rollover crash test according to claim 1, characterized in that: Still include left guide post, right guide post and are located sliding platform both sides respectively, the upper end of left guide post, right guide post is connected with motor mounting frame, the first guide block is combined on the left guide post and slides, the second guide block is combined on the right guide and slides, the first guide block is fixedly connected with the sliding block seat on left stand, and the second guide block is fixedly connected with the sliding block seat on right stand.

3. The test rig for the car rollover crash test according to claim 1, characterized in that: First chain transmission mechanism includes first driving wheel, first guide wheel, first driven wheel, first fixed wheel, first tensioning wheel shaft, first tensioning wheel, first transmission chain, first driving wheel sets up on transmission shaft, first guide wheel is installed on the sliding block seat of left stand, and first guide wheel moves along first transmission chain and is used for driving the sliding block seat on left stand to slide on left stand, first driven wheel is installed on left stand and is located below sliding block seat, first fixed wheel is installed on motor mounting frame and is located above the sliding block seat of left stand, first tensioning wheel shaft is supported on motor mounting frame and is located below first fixed wheel side, first tensioning wheel is installed on first tensioning wheel shaft, and first transmission chain is installed on first driving wheel, first guide wheel, first driven wheel, first fixed wheel, first tensioning wheel.

4. The test rig for a car rollover crash test according to claim 1, wherein: The second chain transmission mechanism comprises a second driving wheel, a second guide wheel, a second driven wheel, a second fixed wheel, a second tension wheel shaft, a second tension wheel and a second transmission chain, the second driving wheel is arranged on the transmission shaft, the second guide wheel is installed on the slider seat of the right stand column and moves along the second transmission chain to drive the slider seat on the right stand column to slide on the right stand column, the second driven wheel is installed below the slider seat on the right stand column, the second fixed wheel is installed above the slider seat of the right stand column on the motor mounting frame, the second tension wheel shaft is supported below the second fixed wheel side on the motor mounting frame, the second tension wheel is installed on the second tension wheel shaft, and the second transmission chain is installed on the second driving wheel, the second guide wheel, the second driven wheel, the second fixed wheel and the second tension wheel.

5. The test rig for automotive rollover crash test as claimed in claim 1 wherein: When the slide table driving device loads a sine wave on the slide table, the slide table emission time expression is as follows: In the formula, is the sliding table launch time when the sine wave, is the test vehicle collision vertical velocity corresponding to the current test condition, is the test vehicle collision vertical acceleration corresponding to the current test condition, is the period correction coefficient.

6. The test rig for a car rollover crash test according to claim 1, wherein: When the slide table driving device loads a trapezoidal wave on the slide table, the slide table emission time expression is as follows: In the formula, is the launch time of the sled when the trapezoidal wave is used, is the vertical velocity of the test vehicle corresponding to the current test condition, is the vertical acceleration of the test vehicle corresponding to the current test condition, is the sled collision speed corresponding to the current test condition, is the sled collision speed corresponding to the current test condition.

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