Rolling collision deflectable test bed based on sliding table

Abstract

The utility model relates to a rolling collision deflectable test bed based on a sliding table, which is characterized in that the sliding table is in sliding fit with a base, two supporting racks are fixed on the base and are respectively positioned on two sides of the sliding table, a rotating arm is arranged between the two supporting racks and is used for fixing a test vehicle, and first positioning holes are formed in the upper parts of the supporting racks; a plurality of first fixing holes and first positioning holes which are distributed in an arc shape are formed in the lower portion, the first fixing holes are used for installing guide rail plates, guide rails are arranged on the guide rail plates of the two supporting racks, sliding blocks are in sliding fit with the guide rails respectively, supporting holes are transversely formed in the sliding blocks, and first transmission shafts are supported in the supporting holes; the two ends of the rotating arm are fixedly connected with the first transmission shaft respectively, a connecting piece is arranged between the first transmission shaft and the rotating arm, a plurality of mounting holes are formed in the connecting piece and used for mounting the rotating arm and the first transmission shaft, the first transmission shaft is connected with the rotating device, and the sliding block is connected with the lifting device. The problem of low reliability of the existing rolling collision test is solved by adjusting the collision angle and increasing the simulation working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of crash test, specifically relates to a kind of rollover crash deflectable test bench based on sliding platform. BACKGROUND

[0002] Currently, the main test methods for simulating vehicle rollover accidents include roof crush test, trolley drum type rollover test and repeatable rollover test, etc. Roof crush test is mainly used to measure the pressure resistance of vehicle roof 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 assess the safety of vehicles in actual rollover accidents. Trolley drum type rollover test attempts to make up for the above shortcomings by simulating the rollover process of vehicles under certain conditions, but there is still a big difference between the simulated vehicle motion pattern and the actual rollover accident, which can only represent a very limited type of rollover situation. 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), attempt to simulate the vehicle rotation process in a rollover accident through a spinning mechanism to improve the controllability and repeatability of the test. However, this repeated rollover test cannot fully capture all relevant dynamic factors, such as the collision angle, which may have limitations in safety assessment, thereby affecting the reliability of the rollover test results. SUMMARY

[0003] The utility model intends to provide a kind of rollover crash deflectable test bench based on sliding platform, by adjusting collision angle increases simulation working condition, to solve the problem of low reliability of existing rollover crash test.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a kind of rollover crash deflectable test bench based on sliding platform, including base, two support racks, sliding platform, rotating device, lifting device;The sliding platform is slidingly fitted on the base, and the two support racks are fixed on the base and located on both sides of the sliding platform, respectively, a rotating arm is arranged between the two support racks for fixing the test vehicle, the upper part of the support rack is provided with a first positioning hole, and the lower part is provided with a plurality of first fixing holes, the first positioning hole and the first fixing hole are used to install the guide rail plate, guide rails are arranged on the guide rail plate of the two support racks, sliding blocks are slidingly fitted on the guide rails, respectively, the sliding blocks are transversely provided with support holes, a first transmission shaft is supported in the support holes, the two ends of the rotating arm are fixedly connected with the first transmission shaft, respectively, a connecting piece is arranged between the first transmission shaft and the rotating arm, the connecting piece is provided with a plurality of mounting holes, the mounting holes are used to install the rotating arm and the first transmission shaft, the first transmission shaft is connected with the rotating device, and the sliding block is connected with the lifting device.

[0005] The advantages and principles of the present scheme are: the test vehicle is installed on the rotating arm, the sliding block, the rotating arm and the test vehicle on the rotating arm are lifted to a set height by the lifting device, during the test, the rotating arm is driven by the rotating device to drive the test vehicle to rotate, and the test vehicle is lowered, then power is applied to the sliding table to make the sliding table slide on the base, and the test vehicle contacts and collides with the table surface of the sliding table to simulate the working condition of the vehicle rollover collision; the test vehicle is set at different heights by the lifting device to apply different vertical speeds, and the sliding table is set at different horizontal speeds to simulate various working conditions of the vehicle; the test vehicle can reach the set vertical speed by the lifting device, and the repeatability of the test is ensured; the first positioning hole and the first fixing hole are arranged on the support rack to fix the guide rail plate, the upper part of the guide rail plate is positioned through the first positioning hole, and the lower part of the guide rail plate is fixed with different first fixing holes according to the test requirements, so that the guide rail plate is installed at different deflection angles to simulate different working conditions, and the position of the guide rail plate is adjusted according to different vehicle models, so that vehicles of different sizes and types can be tested; the connecting piece is arranged between the rotating arm and the first transmission shaft, and different mounting holes are arranged on the connecting piece, the mounting positions of the rotating arm and the first transmission shaft are adjusted, so that the test vehicle rotates at different angular velocities around the axis of the rotating arm to meet the angular velocity requirement of the vehicle in the rollover accident.

[0006] Preferably, the support rack comprises a support frame and a mounting plate, the support frame is fixedly connected with the base, and the mounting plate is fixed on the side surface of the support frame. The mounting plates of the two support racks are arranged opposite to each other, and the first positioning hole and the first fixing hole are arranged on the mounting plate. By firmly connecting the support frame with the base and fixing the mounting plate on the side surface of the support frame, a more stable foundation support can be provided for the entire test bench, ensuring that the equipment itself does not displace or shake during the rollover collision test; the first positioning hole and the first fixing hole are arranged on the mounting plate, which not only facilitates the accurate installation and adjustment of the guide rail plate, but also allows the positions of these holes to be flexibly changed according to the requirements of different vehicle models and test conditions, thereby adapting to vehicles of different sizes and types for testing; since the first positioning hole and the first fixing hole are concentrated on the mounting plate, once these components need to be maintained or replaced, the operation will be more convenient and fast, without the need to disassemble the entire support frame on a large scale. The stable support frame structure and accurate hole position setting help to ensure the stability and reliability of all components during the test, reduce the safety risks caused by mechanical failures, and protect the safety of the experimental personnel and equipment.

[0007] Preferably, the rotating device includes a rotating motor, a second transmission shaft, a third transmission shaft, the first transmission shaft is connected with the second transmission shaft through a universal joint, the second transmission shaft is connected with the third transmission shaft through a universal joint, and the third transmission shaft is fixedly connected with the motor shaft of the rotating motor. The use of universal joints to connect different transmission shafts can provide certain angle compensation between different shafts, allow effective power transmission even if the shaft lines are not completely aligned, adapt to small positional deviations that may occur during installation or operation of the test bench, and compensate for the angle deviation caused by the first transmission shaft rising with the slider, thereby avoiding affecting power transmission. The design of the universal joint helps to disperse the torque and other mechanical stresses transmitted by the rotating motor, preventing these stresses from concentrating on a certain point and causing component damage.

[0008] Preferably, the lifting device includes a lifting motor and a screw mechanism, the motor shaft of the lifting motor is fixedly connected with the screw rod of the screw mechanism, and the nut of the screw mechanism is fixedly connected with the slider. By using the screw mechanism, the slider and the part connected with the slider can realize precise lifting operation along the screw rod, providing high positional accuracy and repeatability, and ensuring accurate test height for the car rollover crash test. By driving the screw mechanism with a motor, the entire lifting process can be smooth and impact-free, reducing the additional stress or damage that may be caused to the experimental equipment and test vehicles.

[0009] Preferably, the base is provided with a slide rail, and the slide table is in sliding fit with the base through the slide rail. The use of the slide rail can provide accurate guidance for the slide table, ensuring that the slide table maintains straight-line motion during movement. Through the restraining action of the slide rail, the shaking or deviation of the slide table during movement can be significantly reduced, thereby improving the stability of the entire system and ensuring the accuracy of the car rollover crash test, which helps to ensure the reliability and repeatability of the test results.

[0010] Preferably, the system further includes a slide table driving device for driving the slide table. The slide table driving device can provide precise control of the movement of the slide table, ensuring consistency and accuracy for each test. By integrating the slide table driving device, the test process can be automated, reducing human intervention, which not only improves experimental efficiency but also reduces the risk of errors caused by human factors. The driving device can ensure that the slide table maintains the same motion trajectory and speed during multiple runs, which is particularly important for situations that require repeated testing under the same conditions, and helps to obtain reliable data comparison results. Different power can be applied to the slide table according to specific requirements to meet the experimental requirements of different types.

[0011] Preferably, a vehicle body fixing plate is arranged on the connecting piece for fixed connection with the test vehicle. The vehicle body fixing plate provides a solid and reliable connection point, and is a clear and easy-to-operate fixing position, so that the installation and disassembly process is more convenient and fast, and the test vehicle is securely fixed on the rotating arm during the entire rollover crash test, which reduces the risk of accidental sliding or falling due to insecure fixing, and ensures the safety of the test process. According to the size and structural characteristics of different vehicle models, the vehicle body fixing plate can be designed in an adjustable form, or a series of fixing plates suitable for different vehicle models are prepared. In this way, various types of vehicles can be tested flexibly, increasing the versatility and practicality of the equipment.

[0012] Preferably, the first positioning hole and the first fixing hole are both through holes, a second positioning hole is arranged at the upper part of the guide rail plate, and a plurality of second fixing holes are arranged on both sides of the guide rail plate. The upper part of the guide rail plate is bolted to the support rack through the second positioning hole to realize positioning, and the lower part is bolted to the support rack through the second fixing hole. The guide rail plate is firmly fixed on the support rack through bolts, which can provide a stable basic structure, which is crucial for ensuring the safety and accuracy of the test process; since the bolt connection method is adopted, the disassembly and replacement of the guide rail plate and its related components become relatively simple and fast. When maintenance or updating is required, the bolts only need to be loosened, without the need for complex tools or processes.

[0013] Preferably, the plurality of first fixing holes are arranged in an arc shape. The arc-shaped first fixing holes allow the guide rail plate to be adjusted in installation position along an arc path within a certain range. This design is particularly suitable for test scenarios that require simulation of different rollover angles or trajectories, allowing the test equipment to flexibly adapt to the needs of multiple rollover angles. By selecting different fixing holes to install the guide rail plate, the angle and position of the test device can be easily changed to support the testing requirements of different types or sizes of vehicles, which increases the diversity of experimental settings and improves the versatility of the entire system. Furthermore, the arc layout helps to distribute the force applied to the support rack, making the entire structure more stable. By arranging two arc-shaped first fixing holes, the guide rail plate and the support rack are more stable. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is an axonometric view of the present utility model;

[0015] Figure 2 is an axonometric view of the present utility model; Figure 1 is an enlarged view of A in figure 6;

[0016] Figure 3 is an axonometric view of the present utility model from another angle;

[0017] Figure 4 is an axonometric view of the present utility model from another angle; Figure 2Enlarged view of the middle B;

[0018] Figure 5 Front view of the utility model;

[0019] Figure 6 Side view of the utility model;

[0020] Figure 7 For Figure 6 Sectional view of the middle C-C direction;

[0021] Figure 8 For Figure 7 Enlarged view of the middle C. DETAILED DESCRIPTION

[0022] Further details are described below through specific embodiments: refer to Figures 1 to 8 A kind of based on the deflection test bench of rolling collision of sliding table, including base, two support racks, sliding table 1, rotating device, lifting device, it further includes sliding table driving device 16.The sliding table driving device 16 is used to drive sliding table 1;Sliding rail is equipped on the base, and the sliding table 1 is slidably matched with the base by sliding rail.Two support racks are fixed on the base and located at the two sides of sliding table 1, and a rotating arm 6 is arranged between the two support racks for fixing test vehicle.The upper portion of the support rack is equipped with first positioning hole, and the lower portion is equipped with multiple first fixed holes 21, and the first fixed hole is distributed as multiple arcs, and in the embodiment, first fixed hole is distributed as two arcs.The support rack includes support frame 9 and mounting plate 2, and the support frame 9 is fixedly connected with the base by bolt, and the mounting plate 2 is fixed on the side of support frame 9, and the mounting plate 2 of two support racks is oppositely arranged.The first positioning hole and first fixed hole 21 are all arranged on mounting plate 2.

[0023] The first positioning hole and first fixed hole are via hole, and the first positioning hole and first fixed hole 21 are used to install guide rail plate 3, and a second positioning hole is arranged in the upper portion of guide rail plate 3, and multiple second fixed holes are symmetrically arranged on both sides, the upper portion of guide rail plate 3 is bolted with the first positioning hole on the support rack through second positioning hole to realize positioning, and the lower portion is bolted with the first fixed hole on the support rack through second fixed hole to complete fixing.

[0024] The guide rail plate 3 of the two support stands is provided with a guide rail, and a sliding block is slidably connected to the guide rail. The sliding block is provided with a support hole in the transverse direction, a first transmission shaft 13 is supported in the support hole, and the two ends of the rotating arm 6 are fixedly connected with the first transmission shaft 13. A connecting piece 4 is arranged between the first transmission shaft 13 and the rotating arm 6, and a vehicle body fixing plate 7 is arranged on the connecting piece 4 and used for fixedly connecting with a test vehicle. The connecting piece 4 is provided with a plurality of mounting holes which are arranged in sequence. In the embodiment, the number of the mounting holes is four. The first transmission shaft 13 is connected with a rotating device, and the sliding block is connected with a lifting device.

[0025] The mounting holes include first mounting holes and second mounting holes. In the embodiment, two first mounting holes and two second mounting holes are arranged. The first mounting holes are used for mounting the rotating arm 6, and the second mounting holes are used for mounting the first transmission shaft 13. The first mounting holes and the second mounting holes have the same structure. The rotating arm 6 extends into the first mounting hole and is fixed by bolts. The first transmission shaft 13 has a T-shaped cross section. The head of the T-shaped cross section extends into the second mounting hole and is fixedly connected with the connecting piece 4. The tail of the T-shaped cross section is supported in the support hole of the sliding block by a bearing.

[0026] The rotating device includes a rotating motor 10, a second transmission shaft 12 and a third transmission shaft 11. The first transmission shaft 13 is connected with the second transmission shaft 12 through a universal joint. The second transmission shaft 12 is connected with the third transmission shaft 11 through a universal joint. The third transmission shaft 11 is fixedly connected with the motor shaft of the rotating motor 10. The lifting device includes a lifting motor 15 and a lead screw mechanism 14. The motor shaft of the lifting motor 15 is fixedly connected with the lead screw of the lead screw mechanism 14. The nut of the lead screw mechanism 14 is fixedly connected with the sliding block.

[0027] The lead screw mechanism 14 is provided with a brake. The brake can be arranged at the end of the lead screw or in the lifting motor. In the embodiment, the brake is arranged at the end of the lead screw. The brake is an electromagnetic brake.

[0028] The number of the rotating device and the lifting device can be two sets which are arranged on the two support stands respectively. Alternatively, the number of the rotating device and the lifting device can be one set. In the embodiment, the number of the rotating device and the lifting device is one set. The rotating device is arranged on one side of the support stand. The tail of the first transmission shaft 13 extends out of the sliding block 81 on the side of the support stand through the second transmission shaft 12 and the third transmission shaft 11, and is connected with the motor shaft of the rotating motor 10. The lifting device is arranged on the other side of the support stand. The sliding block 8 on the side of the support stand is connected with the lifting device. The lifting motor 15 is arranged on the top of the side of the support stand, and the lead screw mechanism is fixedly connected with the mounting plate 2.

[0029] Working principle: when the rolling collision test is carried out, first, the installation angle of the guide rail plate, the installation position of the rotating arm and the first transmission shaft on the connecting piece, and the falling height of the test vehicle are adjusted according to the test working condition requirements;

[0030] Then, when the experiment is carried out, the test vehicle is rotated through the rotating device through the rotating arm, and then the test vehicle is dropped, the test vehicle is driven by the slide table driving device to slide on the base under the action of its own gravity or the lifting motor, and the test vehicle is in contact with the moving slide table surface at the set vertical speed, different angles, rotating speeds, slide table speeds and falling speeds are set to simulate different working conditions of the vehicle when falling to the ground in the rolling collision accident.

[0031] The above is only an embodiment of the present application, and the well-known specific technical solutions and / or characteristics in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical scheme of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A tumbling collision deflectable test bench based on a sliding table, characterized in that: The device includes a base, two support frames, a slide (1), a rotating device, and a lifting device. The slide (1) is slidably fitted on the base. The two support frames are fixed on the base and located on both sides of the slide (1). A rotating arm (6) is set between the two support frames to fix the test vehicle. The upper part of the support frame is provided with a first positioning hole, and the lower part is provided with multiple first fixing holes (21). The first positioning hole and the first fixing holes (21) are used to install guide rail plates (3). Guide rails are provided on the guide rail plates (3) of the two support frames. Sliding sliders are slidably fitted on the guide rails. Support holes are provided horizontally on the sliders. A first transmission shaft (13) is supported in the support holes. The two ends of the rotating arm (6) are fixedly connected to the first transmission shaft (13). A connecting piece (4) is provided between the first transmission shaft (13) and the rotating arm (6). The connecting piece (4) is provided with multiple mounting holes for installing the rotating arm (6) and the first transmission shaft (13). The first transmission shaft (13) is connected to the rotating device, and the slider is connected to the lifting device.

2. The tumbling collision deflectable test bench based on a sliding table according to claim 1, characterized in that: The support frame includes a support frame (9) and a mounting plate (2). The support frame (9) is fixedly connected to the base. The mounting plate (2) is fixed on the side of the support frame (9). The mounting plates (2) of the two support frames are arranged facing each other. The first positioning hole and the first fixing hole are both arranged on the mounting plate (2).

3. The tumbling collision deflectable test bench based on a sliding table according to claim 1, characterized in that: The rotating device includes a rotary motor (10), a second drive shaft (12), and a third drive shaft (11). The first drive shaft (13) is connected to the second drive shaft (12) via a universal joint, and the second drive shaft (12) is connected to the third drive shaft (11) via a universal joint. The third drive shaft (11) is fixedly connected to the motor shaft of the rotary motor (10).

4. The tumbling collision deflectable test bench based on a sliding table according to claim 1, characterized in that: The lifting device includes a lifting motor (15) and a lead screw mechanism (14). The motor shaft of the lifting motor (15) is fixedly connected to the lead screw of the lead screw mechanism (14), and the nut of the lead screw mechanism (14) is fixedly connected to the slider.

5. The tumbling collision deflectable test bench based on a sliding table according to claim 1, characterized in that: The base is provided with a slide rail, and the slide table (1) slides in cooperation with the base through the slide rail.

6. The tumbling collision deflectable test bench based on a sliding table according to claim 1, characterized in that: It also includes a slide drive device (16) for driving the slide (1).

7. The tumbling collision deflectable test bench based on a sliding table according to claim 1, characterized in that: The connector (4) is provided with a vehicle body fixing plate (7) for fixed connection with the test vehicle.

8. The tumbling collision deflectable test bench based on a sliding table according to claim 1, characterized in that: The first positioning hole and the first fixing hole are both through holes. The upper part of the guide rail plate (3) is provided with a second positioning hole, and multiple second fixing holes are provided on both sides. The upper part of the guide rail plate (3) is bolted to the support frame through the second positioning hole, and the lower part is bolted to the support frame through the second fixing hole.

9. The tumbling collision deflectable test bench based on a sliding table according to claim 1, characterized in that: Multiple first fixing holes are distributed in an arc shape.

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