Fixed rolling collision test bench

Abstract

The invention relates to the technical field of collision tests, in particular to a fixed rolling collision test bed which comprises a left supporting rack and a right supporting rack, a collision table top is arranged between the left supporting rack and the right supporting rack, a lifting air cylinder is arranged at the bottom of the collision table top, the left supporting rack and the right supporting rack are the same in structure, and guide transverse rods are arranged on the two supporting racks. Sliding assemblies are in sliding fit with the guide transverse rods, driven transmission mechanisms are arranged on the supporting racks respectively, the driven transmission mechanisms are in transmission connection with the sliding assemblies and drive the sliding assemblies to slide in the front-back direction of the guide transverse rods, the two driven transmission mechanisms are in transmission connection with driving transmission mechanisms respectively, and a rotating shaft is arranged between the two sliding assemblies. The rotating shaft is used for installing a test vehicle, and the end of the rotating shaft is connected with a rotating motor. The problems that the vertical speed of an existing rolling collision test is difficult to control and the repeatability is low are solved.

Description

Technical Field

[0001] The invention relates to the technical field of collision tests, and in particular to a fixed rollover collision test bench. Background Art

[0002] In the field of vehicle safety performance research, accurate simulation of vehicle collision scenarios is crucial for evaluating vehicle structural safety and developing effective safety protection systems. Currently, commonly used vehicle collision simulation methods mainly include real vehicle collision tests and bench simulation tests. Real vehicle collision tests are expensive and have great safety risks. It is difficult to conduct a large number of repetitive tests. Bench simulation tests have become an important alternative. At present, when simulating vehicle collisions, existing bench simulation tests usually simulate the vertical velocity in vehicle rollover collision tests by causing the test vehicle to free fall. This method cannot accurately control the vertical velocity and acceleration, and it is difficult to truly restore the situation where the vehicle falls from a high height in a rollover accident, resulting in inaccurate safety performance assessment of the vehicle under such complex working conditions. It also makes it difficult for vehicle collision simulation schemes to accurately reproduce test results by adjusting test parameters, which greatly hinders in-depth research on the vehicle collision process and effective improvement of safety technology. Summary of the invention The present invention aims to provide a fixed rollover collision test bench to solve the problems of difficult control of vertical speed and low repeatability of the existing rollover collision test.

[0003] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a fixed rollover collision test bench, comprising a left support frame and a right support frame, a collision table surface is arranged between the left and right support frames, a lifting cylinder is arranged at the bottom of the collision table surface, the left and right support frames have the same structure, both support frames are provided with a guide cross bar, the guide cross bar slides with a sliding assembly, and the support frames are respectively provided with a driven transmission mechanism, the driven transmission mechanism is connected with the sliding assembly in a transmission manner to drive the sliding assembly to slide along the front and rear directions of the guide cross bar, the two driven transmission mechanisms are respectively connected with an active transmission mechanism in a transmission manner, a rotating shaft is arranged between the two sliding assemblies, the rotating shaft is used to install the test vehicle, and the end of the rotating shaft is connected to a rotating motor.

[0004] The advantages and principles of this solution are as follows: The driven transmission mechanism is driven by the active transmission mechanism, so that the test vehicle installed on the rotating shaft slides along the guiding crossbar with the sliding component. Moreover, the rotating motor can drive the test vehicle on the rotating shaft to rotate at a certain angular velocity. A collision tabletop is arranged between the two support brackets and is coordinated with the lifting cylinder. When the test vehicle passes through the collision tabletop at the calculated time, the lifting cylinder pushes the collision tabletop to rise, simulating the vertical speed during the rollover collision of the vehicle. The test vehicle installed on the rotating shaft collides with the collision tabletop with a certain vertical speed, simulating the falling situation of the vehicle in an actual rollover accident. Through the cooperation of various components, various motion states and collision conditions during the rollover collision of the vehicle can be simulated, and the versatility and practicability of the test bench are good.

[0005] Among them, the rising speed of the collision tabletop is accurately controlled by the lifting cylinder. Compared with the prior art, the accurate control of the vertical position and speed of the test vehicle solves the problem that the vertical speed in the existing rollover collision test is difficult to control. During the test, since test parameters such as the vertical speed can be accurately controlled, when conducting multiple tests, the test results can be accurately reproduced by adjusting the test parameters, which is beneficial to the in-depth study of the vehicle collision process and the effective improvement of safety technologies, overcoming the problem of low repeatability in the prior art. The guiding crossbar and the sliding component form a low-friction linear guide to ensure the accuracy of the horizontal motion trajectory; and the overall structure composed of the left support bracket, the right support bracket and the collision tabletop is relatively stable, which can ensure the safety and reliability of the test process.

[0006] Preferably, the sliding component includes a housing. A transmission sprocket and a rolling slider are arranged in the housing. The rolling slider includes two clamping plates, and the clamping plates are fixedly connected to the housing. An upper bearing group and a lower bearing group are arranged between the two clamping plates. The number of the upper and lower bearing groups is multiple. A space for the guiding crossbar to pass through is left between the upper and lower bearing groups. Each bearing group includes multiple bearings, and each bearing is in rolling cooperation with the guiding crossbar. The transmission sprocket is supported on the housing and is used for transmission connection with the driven transmission structure.

[0007] Beneficial effects: The rolling slider is in rolling cooperation with the guiding cross bar through the upper and lower bearing groups. Multiple roller bearings are evenly distributed, enabling the sliding assembly to slide more smoothly on the guiding cross bar and reducing jamming phenomena. At the same time, an appropriate space is left between the upper and lower bearing groups for the guiding cross bar to pass through, ensuring the accuracy and stability of the cooperation, effectively supporting the weight of the test vehicle and related equipment, ensuring no shaking or deviation during the test, improving the accuracy and reliability of the test. Moreover, the bearing groups composed of multiple bearings and the design of the upper and lower bearing groups enable the sliding assembly to adapt to guiding cross bars with different diameters and shapes, not only having strong versatility and adaptability, but also having high strength to ensure effective support. The driving sprocket is supported on the housing and is in transmission connection with the driven transmission mechanism, capable of efficiently transmitting the power of the driven transmission mechanism to the sliding assembly and driving it to move along the guiding cross bar. Sprocket transmission has the advantages of accurate transmission ratio, high transmission efficiency, large load-bearing capacity, etc., can adapt to different motion requirements and load changes during the test, and ensure the stable operation of the entire transmission system.

[0008] Further preferably, the housing includes an inner plate and a cover plate. The inner plate is fixedly connected to the cover plate, and multiple weight-reducing holes are provided on the inner plate.

[0009] Beneficial effects: The housing of the sliding assembly integrates components such as the driving sprocket and the rolling slider, with a compact structure and small occupied space. The clamping plate is fixedly connected to the housing, fixing the upper and lower bearing groups between the clamping plates to form an integral structural unit, facilitating installation and maintenance, and at the same time improving the strength and rigidity of the entire sliding assembly. Multiple weight-reducing holes are provided on the inner plate, which can effectively reduce the weight of the sliding assembly on the premise of ensuring the structural strength of the housing, reduce the load of the entire test bench, lower the requirements for the support structure and the transmission mechanism, and at the same time contribute to improving the motion flexibility and response speed of the sliding assembly, making the motion of the test vehicle during the simulated collision process closer to the real situation.

[0010] Preferably, the driven transmission mechanism includes a first transmission chain, a first transmission wheel, and a guiding wheel. The first transmission wheel and the guiding wheel are both supported on the support bench. The first transmission chain is installed on the first transmission wheel and the guiding wheel. The first transmission wheel is in transmission connection with the driving transmission mechanism, and the first transmission chain is in transmission connection with the sliding assembly.

[0011] Beneficial effects: The driven transmission mechanism composed of the first transmission chain, the first transmission wheel and the guide wheel has a relatively simple structure, which is easy to manufacture, install and maintain. While ensuring the transmission function, it reduces the complexity and failure rate of the system, improves the reliability and service life of the entire test bench, and reduces the maintenance cost and downtime. At the same time, the chain drive has the characteristics of stable transmission and low noise, which can provide a relatively quiet environment for the test, is conducive to the test personnel to accurately observe and record various data and phenomena during the test process, and also reduces the impact of noise on the test environment and surrounding personnel. In addition, the stable transmission also helps to improve the accuracy and repeatability of the test results.

[0012] Further preferably, the driving transmission mechanism includes a traction motor and a transmission shaft, the transmission shaft is power-connected to the traction motor, second transmission wheels are arranged at both ends of the transmission shaft, and the second transmission wheels are respectively engaged with the first transmission wheels.

[0013] Beneficial effects: The second transmission wheels at both ends of the transmission shaft are simultaneously engaged with the two first transmission wheels, so that the driven transmission mechanisms on the left and right sides can operate synchronously, thereby ensuring that the test vehicle installed on the rotating shaft between the two sliding components remains balanced and stable during the movement process. The traction motor as the power source is convenient for precise control and adjustment through the electrical control system. According to different test requirements, the rotation speed and torque of the traction motor can be flexibly adjusted, so as to accurately control parameters such as the movement speed and acceleration of the test vehicle. This easy-to-control and adjustable characteristic enables the test bench to adapt to a variety of vehicle rollover and collision tests of different types and working conditions, improving the versatility and applicability of the test bench.

[0014] Further preferably, the driving transmission mechanism further includes a second transmission chain, a third transmission wheel is arranged on the transmission shaft, a fourth transmission wheel is fixedly connected to the motor shaft of the traction motor, and the third transmission wheel and the fourth transmission wheel are connected by the second transmission chain.

[0015] Beneficial effects: The transmission chain has a certain elasticity and can play a role in buffering and shock absorption during the transmission process. When the traction motor starts, stops or there is a load change during the operation process, the second transmission chain absorbs a part of the impact energy, reduces the impact force on the transmission shaft, the traction motor and other transmission components, reduces the risk of wear and damage of the components, extends the service life of the equipment, and also helps to improve the stability and safety of the test process. By connecting the third transmission wheel and the fourth transmission wheel through the second transmission chain, the traction motor can be installed at a position far from the transmission shaft, making the layout of the traction motor more flexible and optimizing the overall structural layout of the test bench.

[0016] Further preferably, the support platform frame further includes a front support column and a rear support column. The two ends of the guiding cross bar are respectively fixedly connected to the front support column and the rear support column. The guiding wheels include a first guiding wheel, a second guiding wheel, and a third guiding wheel. The first driving wheel and the first guiding wheel are installed on the front support column, and the second guiding wheel and the third guiding wheel are installed on the rear support column.

[0017] Beneficial effects: The two ends of the guiding cross bar are respectively fixedly connected to the front support column and the rear support column, providing stable support for the guiding cross bar, enabling it to bear the weights of components such as the sliding assembly and the test vehicle, ensuring that the entire structure will not deform or shake during the test, thereby improving the accuracy and reliability of the test.

[0018] Further preferably, the front support columns of the two support platform frames are connected by a first reinforcing cross bar, and the rear support columns are connected by a second reinforcing cross bar.

[0019] Beneficial effects: By connecting the reinforcing cross bars between the front support columns and the rear support columns of the two support platform frames respectively, the two support platform frames can be connected into a whole, making the entire structure form a stable framework, effectively improving the anti-deformation ability and load-bearing capacity of the structure, ensuring the stability of the support platform frame during the test, reducing structural shaking and deformation, and thus improving the accuracy and reliability of the test results.

[0020] Preferably, a fixing plate is fixedly connected to the rotating shaft, and the fixing plate is used for fixedly connecting to the front and rear ends of the test vehicle.

[0021] Beneficial effects: The fixing plate facilitates the fixation of the front and rear ends of the test vehicle, ensuring the reliability of the test.

[0022] Preferably, the rotating shaft and the test vehicle are connected through a connecting tooling, and multiple groups of connecting toolings with different sizes are provided.

[0023] Beneficial effects: The test vehicle is connected to the rotating shaft through the connecting tooling. According to different test rotation centers required by the test, the corresponding size of the connecting tooling is selected to adapt to the needs of different vehicle models or test scenarios. Multiple test configurations can be achieved by quickly replacing the connecting tooling without re-designing or machining parts. Multiple groups of connecting toolings can be pre-calibrated and prepared in advance, and directly switched during the test, reducing the debugging and installation time and improving the efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a front view of the present invention; Figure 3 is a top view of the present invention; Figure 4 is Figure 3View A-A thereof; Figure 5 is Figure 3 View C-C thereof; Figure 6 Schematic diagram of the internal structure of the left sliding component of the embodiment of the present invention; Figure 7 Schematic diagram of the internal structure of the right sliding component of the embodiment of the present invention; Figure 8 Schematic diagram of the connection between the driven transmission mechanism and the driving transmission mechanism of the present invention; Figure 9 is Figure 8 Enlarged view at C.

[0025] The reference signs in the accompanying drawings of the specification include: base 1, left support frame 11, right support frame 12, guiding cross bar 13, collision table top 2, lifting air cylinder 21, driven transmission mechanism 3, first transmission chain 31, first transmission wheel 32, first guiding wheel 33, second guiding wheel 34, third guiding wheel 35, sliding component 4, transmission sprocket 41, rolling slider 42, clamping plate 421, upper bearing group 422, lower bearing group 423, inner plate 44, cover plate 45, driving transmission mechanism 5, traction motor 51, second transmission chain 52, transmission shaft 53, second transmission wheel 54, fourth transmission wheel 55, third transmission wheel 56, rotating shaft 6, connecting portion 61, fixing plate 62, rotating motor 7, front support column 81, rear support column 82, first reinforcing cross bar 91, second reinforcing cross bar 92. Detailed implementation manners

[0026] The following is a further detailed description through specific implementation manners: Refer to Figures 1 to 9 , a fixed-rolling collision test bench, including a left support frame 11 and a right support frame 12. A collision table top 2 is arranged between the left and right support frames. A lifting air cylinder 21 is arranged at the bottom of the collision table top 2. The left and right support frames have the same structure. A plurality of guiding cross bars 13 are arranged on both support frames. In this embodiment, each support frame is respectively provided with two guiding cross bars 13. A sliding component 4 is in sliding fit with the guiding cross bar 13. Driven transmission mechanisms 3 are respectively arranged on the support frames. The driven transmission mechanism 3 is in transmission connection with the sliding component 4 to drive the sliding component 4 to slide in the front and rear directions along the guiding cross bar 13. The driven transmission mechanisms 3 on both support frames are respectively in transmission connection with a driving transmission mechanism 5. A rotating shaft 6 is arranged between the sliding components 4 of both support frames. The rotating shaft 6 is used for installing a test vehicle, and a rotating motor 7 is connected to the end of the rotating shaft 6.

[0027] Preferably, the support platform frame further includes a front support column 81 and a rear support column 82. Both ends of the guiding cross bar 13 are fixedly connected to the front support column 81 and the rear support column 82 respectively. The front support columns 81 of the two support platform frames are connected by a first reinforcement cross bar 91, and the rear support columns 82 are connected by a second reinforcement cross bar 92.

[0028] Preferably, the sliding assembly 4 includes a housing. A driving sprocket 41 and rolling sliders 42 are arranged in the housing. The driving sprocket 41 is supported on the housing by bearings. The number of the rolling sliders 42 is multiple, and they are respectively located at the upper and lower parts of the housing. In this embodiment, there are four symmetrically arranged rolling sliders 42, two of which are located at the upper part of the housing and two are located at the lower part of the housing. The driving sprocket 41 is located in the middle of the housing, and the number of the driving sprockets 41 is multiple, which are symmetrically arranged up and down. In this embodiment, the number of the driving sprockets 41 is four. The rolling slider 42 includes two clamping plates 421, and the clamping plates 421 are bolted to the housing. An upper bearing group 422 and a lower bearing group 423 are arranged between the two clamping plates 421. The upper and lower bearing groups are respectively located at the upper and lower parts of the clamping plates 421. The number of the upper and lower bearing groups is multiple. In this embodiment, the number of the upper bearing groups 422 is five and they are located at the upper part of the clamping plates 421, and the number of the lower bearing groups 423 is five and they are located at the lower part of the clamping plates 421. A space for the guiding cross bar 13 to pass through is left between the upper and lower bearing groups. Each bearing group can be one bearing or multiple bearings, and each bearing is in rolling cooperation with the guiding cross bar 13. The bearing is preferably a roller bearing. The driving sprocket 41 is supported on the housing for driving connection with the driven transmission mechanism 3. The housing includes an inner plate 44 and a cover plate 45, and the inner plate 44 is welded or bolted to the cover plate 45. A plurality of weight reduction holes are arranged on the inner plate 44. The rotating motor 7 is installed in the sliding assembly 4, and the motor shaft of the rotating motor 7 is fixedly connected to the rotating shaft 6. The number of the rotating motors 7 can be one or two. In this embodiment, the number of the rotating motors 7 is one, which is arranged in the left sliding assembly 4. The left end of the rotating shaft 6 extends into the left sliding assembly 4 and is directly connected to the motor shaft, and the other end is supported on the right sliding assembly 4.

[0029] Preferably, the driven transmission mechanism 3 includes a first transmission chain 31, a first transmission wheel 32, and guide wheels. The first transmission wheel 32 and the guide wheels are both supported on a support frame. The first transmission chain 31 is installed on the first transmission wheel 32 and the guide wheels. The first transmission wheel 32 is in transmission connection with the driving transmission mechanism 5, and the first transmission chain 31 is in transmission connection with the transmission sprocket 41. Specifically, there are multiple guide wheels. In this embodiment, there are three guide wheels, namely a first guide wheel 33, a second guide wheel 34, and a third guide wheel 35. The first transmission wheel 32 and the first guide wheel 33 are installed on the front support column 81, and the second guide wheel 34 and the third guide wheel 35 are installed on the rear support column 82.

[0030] Preferably, the driving transmission mechanism 5 includes a traction motor 51 and a transmission shaft 53. The transmission shaft 53 is in power connection with the traction motor 51. Second transmission wheels 54 are provided at both ends of the transmission shaft 53, and the second transmission wheels 54 are respectively engaged with the first transmission wheel 32. The transmission shaft 53 and the traction motor 51 can be directly fixedly connected or connected through a second transmission chain 52. In this embodiment, preferably, the transmission shaft 53 and the traction motor 51 are connected through the second transmission chain 52. Specifically, a third transmission wheel 56 is further provided on the transmission shaft 53, the motor shaft of the traction motor 51 is fixedly connected with a fourth transmission wheel 55, and the third transmission wheel 56 and the fourth transmission wheel 55 are connected through the second transmission chain 52.

[0031] Preferably, the rotating shaft 6 is connected to the test vehicle through a connecting tooling. The connecting tooling is provided with multiple groups of different sizes. The size specifically refers to the height of the connecting tooling, that is, the distance between the connection point of the test vehicle and the rotating shaft 6 during the test. Multiple mounting holes are provided on the rotating shaft 6, and the connecting tooling is bolt-fixed to the rotating shaft 6 through the mounting holes.

[0032] A fixing plate 62 is fixedly connected to the rotating shaft 6. The fixing plate 62 is used for fixedly connecting to the front and rear ends of the test vehicle. Connecting portions 61 extending radially outward are respectively provided at both ends of the rotating shaft 6. The fixing plate 62 is fixedly connected to the connecting portions 61 by means of welding or bolt fixation, etc. In this embodiment, bolt fixation is preferred. Multiple connecting holes are provided on the fixing plate 62 for connecting to the front and rear ends of the test vehicle.

[0033] It further includes a base 1. The support frame and the lifting cylinder 21 are installed on the base 1. The cylinder body of the lifting cylinder 21 is fixedly connected to the base 1, and the telescopic rod of the lifting cylinder 21 is fixedly connected to the collision table 2. A guide rod is provided between the collision table 2 and the base 1. The guide rod is telescopic and forms support and guidance when the lifting cylinder 21 lifts the collision table 2.

[0034] The above are only embodiments of the present invention, and common general technical solutions and / or characteristics in the solutions are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solutions of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A fixed- type rolling and collision test bench, characterized in that: It includes a left support stand and a right support stand. A collision tabletop is arranged between the left and right support stands. A lifting cylinder is arranged at the bottom of the collision tabletop. The left and right support stands have the same structure. Guide crossbars are provided on both support stands. A sliding component is slidably matched with the guide crossbars. Driven transmission mechanisms are respectively provided on the support stands. The driven transmission mechanisms are in transmission connection with the sliding component to drive the sliding component to slide back and forth along the guide crossbars. The two driven transmission mechanisms are respectively in transmission connection with a driving transmission mechanism. A rotating shaft is arranged between the two sliding components. The rotating shaft is used for installing a test vehicle, and a rotating motor is connected to the end of the rotating shaft.

2. The fixed-rolling collision test bench according to claim 1, wherein: The sliding component includes a housing. A transmission sprocket and a rolling slider are arranged in the housing. The rolling slider includes two clamping plates. The clamping plates are fixedly connected to the housing. An upper bearing group and a lower bearing group are arranged between the two clamping plates. The number of the upper and lower bearing groups is multiple. A space for the guide crossbar to pass through is left between the upper and lower bearing groups. Each bearing group includes multiple bearings. Each bearing is in rolling cooperation with the guide crossbar. The transmission sprocket is supported on the housing and is used for being in transmission connection with the driven transmission structure.

3. The fixed-rollover collision test bench according to claim 2, characterized in that: The housing includes an inner plate and a cover plate. The inner plate is fixedly connected to the cover plate. Multiple weight-reducing holes are arranged on the inner plate.

4. The fixed-rolling collision test bench according to claim 1, wherein: The driven transmission mechanism includes a first transmission chain, a first transmission wheel, and a guide wheel. The first transmission wheel and the guide wheel are both supported on the support stand. The first transmission chain is installed on the first transmission wheel and the guide wheel. The first transmission wheel is in transmission connection with the driving transmission mechanism. The first transmission chain is in transmission connection with the sliding component.

5. The fixed-rollover collision test bench according to claim 4, wherein: The driving transmission mechanism includes a traction motor and a transmission shaft. The transmission shaft is in power connection with the traction motor. Second transmission wheels are arranged at both ends of the transmission shaft. The second transmission wheels are respectively meshed with the first transmission wheels.

6. The fixed-rollover collision test bench according to claim 5, wherein: The driving transmission mechanism further includes a second transmission chain. A third transmission wheel is arranged on the transmission shaft. A fourth transmission wheel is fixedly connected to the motor shaft of the traction motor. The third transmission wheel and the fourth transmission wheel are connected by the second transmission chain.

7. The fixed-rolling collision test bench according to claim 5, wherein: The support stand further includes a front support column and a rear support column. Both ends of the guide crossbar are respectively fixedly connected to the front support column and the rear support column. The guide wheel includes a first guide wheel, a second guide wheel, and a third guide wheel. The first transmission wheel and the first guide wheel are installed on the front support column. The second guide wheel and the third guide wheel are installed on the rear support column.

8. The fixed-rollover collision test bench according to claim 7, characterized in that: The front support columns of the two support stands are connected by a first reinforcement crossbar, and the rear support columns are connected by a second reinforcement crossbar.

9. The fixed-rolling collision test bench according to claim 1, wherein: A fixing plate is fixedly connected to the rotating shaft. The fixing plate is used for being fixedly connected to the front and rear ends of the test vehicle.

10. The fixed-rolling collision test bench according to claim 1, wherein: The rotating shaft and the test vehicle are connected by a connecting tooling. Multiple groups of connecting toolings with different sizes are provided.

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