Jacking device bench test device for pedestrian protection

Abstract

The utility model discloses a jack bench test device for pedestrian protection, which comprises a bench workbench, a simulation engine cover is arranged on the bench workbench, the front end and the rear end of the simulation engine cover are respectively provided with a lock catch, an up-and-down adjusting mechanism, a front-and-back adjusting mechanism and a left-and-right adjusting mechanism, and the simulation engine cover is further connected with a return force testing mechanism. According to the utility model, the problem that the working parameters of the jacking device are difficult to accurately test by the existing analogue simulation is solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of lifting device performance testing equipment, and relates to a test device for a lifting device for pedestrian protection. Background Technology

[0002] The development of the jacking device has faced numerous challenges. Currently, the industry lacks a mature and comprehensive experience system for reference, and existing testing methods mostly rely on simulation. Specifically, this involves constructing a detailed simulation model based on the structural parameters of the jacking device, and then adjusting the characteristic parameters to obtain detailed simulation curves of displacement and lifting force. However, this approach is limited to simulating jacking performance testing under ideal conditions, and has many insurmountable limitations in real-world applications.

[0003] Real-world traffic environments are extremely complex, with numerous and intertwined external influencing factors. For example, during a real vehicle collision, road conditions are often uneven, which can have unexpected effects on the operation of the lifter. Different weather conditions are also significant; for instance, slippery roads caused by rain can alter the friction between vehicle components, while low temperatures can cause changes in component performance, thus affecting the normal operation of the lifter. The different postures of vehicles during travel, as well as the various random situations that occur at the moment of contact between pedestrians and vehicles, are all complex external factors that are difficult to accurately represent in simulation models and take into account.

[0004] Although simulation can help to understand the basic performance of the lift to some extent, it cannot accurately reflect the actual working state of the lift in real traffic environments and its ability to protect pedestrians because it cannot realistically reproduce the aforementioned external factors. Utility Model Content

[0005] The purpose of this invention is to provide a test bench device for a jacking device for pedestrian protection, which solves the problem that existing simulation methods are difficult to accurately test the working parameters of the jacking device.

[0006] The technical solution adopted by this utility model is a test device for a jacking device for pedestrian protection, including a test platform, a simulated engine hood is provided on the test platform, the front and rear ends of the simulated engine hood are respectively provided with a locking mechanism and an up-and-down adjustment mechanism, a front-and-back and left-and-right adjustment mechanism, and the simulated engine hood is also connected to a force measuring mechanism.

[0007] The features of this utility model also include:

[0008] The locking mechanism and the up-and-down adjustment mechanism include a base, which is fixed to the workbench of the frame by bolts. A vertically arranged up-and-down adjustment screw is fixed on the base. A first screw nut is provided on the up-and-down adjustment screw. The first screw nut is fixedly connected to the locking mechanism. The up-and-down adjustment screw is connected to a first handwheel.

[0009] The locking and adjusting mechanism also includes an adjusting frame and a guide rod. The adjusting frame is fixedly connected to the lead screw nut. The locking is fixed on the adjusting frame. The guide rod is set on both sides of the adjusting lead screw. The guide rod is parallel to the adjusting lead screw and the bottom end of the guide rod is fixedly connected to the base. The guide rod passes through the adjusting frame. The first lead screw nut drives the adjusting frame to move up and down along the guide rod. The locking is fixed on the adjusting frame.

[0010] The simulated hood has a hook fixed to the front end, and the hook matches the latch.

[0011] The front-to-back and left-to-right adjustment mechanism includes a front-to-back adjustment screw, which is parallel to the length direction of the simulated engine hood. A second screw nut is provided on the front-to-back adjustment screw, and a connecting seat is fixedly connected to the second screw nut. A guide rail is provided on the connecting seat, and two sliders are provided on the guide rail. The two sliders are respectively engaged with the two sides of the rear end of the simulated engine hood.

[0012] The front and rear adjusting screws are connected to a second handwheel, and fixed seats are provided at both ends of the front and rear adjusting screws. The fixed seats are fixed to the workbench of the frame by bolts.

[0013] The force measurement mechanism includes a hinge fastener, an automotive hinge, a lifter, and multiple pressure sensors. The hinge fastener is fixed on the workbench. One end of the automotive hinge is connected to the simulated hood, and the other end is rotatably connected to the hinge fastener. The lifter is fixed below the simulated hood. The pressure sensors are respectively located at the contact position between the simulated hood and the lifter, the connection position between the simulated hood and the automotive hinge, and the connection point between the automotive hinge and the hinge fastener.

[0014] The force measurement mechanism also includes a cylinder mounting bracket set on the outside of the simulated engine hood. The cylinder mounting bracket includes a connecting base fixed to the workbench. The connecting base is connected to a clamp via a spherical bearing. The clamp holds the cylinder.

[0015] The jack is fixed to the workbench of the frame by a fixed bracket. The fixed bracket is equipped with a displacement sensor, which monitors the lifting height of the jack.

[0016] An angle sensor is installed on the fixture.

[0017] The top of the lifter is in direct contact or connected to the simulated engine hood;

[0018] When the lifter is connected to the simulated engine hood, a connecting block is fixed on the lower surface of the simulated engine hood, and the top of the piston rod of the lifter is connected to the connecting block through a ball joint and a pin.

[0019] The beneficial effects of this utility model are:

[0020] This utility model relates to a test bench for a pedestrian protection lifting device. It can accurately sense multiple key parameters of the lifting device during operation, such as the applied force angle, lifting height, and lifting force, all of which can be precisely quantified. This solves the problem of existing simulations being unable to accurately test the lifting device's operating parameters, providing a comprehensive and accurate data foundation for subsequent analysis. It can quickly adjust parameters such as the simulation angle and the initial state of the lifting device according to actual testing needs, precisely achieving comprehensive control over the testing process and ensuring that each test is conducted according to preset conditions, greatly improving testing efficiency and accuracy. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the pedestrian protection lifting device test stand of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the test bench of the pedestrian protection lifting device test bench of this utility model;

[0023] Figure 3 This is a schematic diagram of the locking and vertical adjustment mechanism in the pedestrian protection lifting device test stand of this utility model;

[0024] Figure 4 This is a schematic diagram of the simulated engine hood structure in the pedestrian protection lifting device test bench of this utility model;

[0025] Figure 5 This is a schematic diagram of the front-to-back and left-to-right adjustment mechanisms in the pedestrian protection lifting device test stand of this utility model;

[0026] Figure 6 is a schematic diagram of the cylinder mounting bracket in the pedestrian protection lifting platform test device of this utility model. Figure 6(a) is a front view of the cylinder mounting bracket and Figure 6(b) is a side view of the cylinder mounting bracket.

[0027] In the diagram, 1. Base, 2. Workbench, 3. Lock and vertical adjustment mechanism, 4. Simulated engine hood, 5. Front-to-back and left-to-right adjustment mechanism, 6. Return force measuring mechanism, 7. Vertical adjustment screw, 8. First handwheel, 9. Vertical adjustment frame, 10. Guide rod, 11. Lock, 12. Hook, 13. Front-to-back adjustment screw, 14. Connecting seat, 15. Guide rail, 16. Slider, 17. Second handwheel, 18. Fixed seat, 19. Hinge fastener, 20. Car hinge, 21. Lifter, 22. Pressure sensor, 23. Connecting base, 24. Clamp, 25. Cylinder. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] This embodiment provides a test device for a jacking device for pedestrian protection, including a test bench 2. A simulated engine hood 4 is provided on the test bench 2. The front and rear ends of the simulated engine hood 4 are respectively provided with a locking and up-down adjustment mechanism 3, a front-back and left-right adjustment mechanism 5, and the simulated engine hood is also connected to a back-positioning force measuring mechanism 6.

[0031] The locking and up-down adjustment mechanism 3 includes a base 1, which is fixed to the workbench 2 by bolts. A vertically arranged up-down adjustment screw 7 is fixed on the base 1. A first screw nut is provided on the up-down adjustment screw 7. The first screw nut is fixedly connected to a locking buckle. The up-down adjustment screw 7 is connected to a first handwheel 8.

[0032] The main components are rationally arranged on the entire test bench 2, forming an organic whole. The test bench serves as the basic support structure of the entire device, providing a stable installation platform for all other mechanisms. The locking and vertical adjustment mechanism 3 works in conjunction with the simulated hood 4, mainly used to adjust and fix the front end of the simulated hood, ensuring that the front end of the hood remains in the accurate position during the test. The front end of the simulated hood 4 is placed in the position determined by the locking and vertical adjustment mechanism 3, and its rear end is connected to the front-rear and left-right adjustment mechanism 5. With this connection, the simulated hood 4 can be flexibly adjusted to better simulate the actual state of the hood under different vehicle models and working conditions. The front-rear and left-right adjustment mechanism 5 mainly adjusts the position of the rear end of the simulated hood 4, assisting the simulated hood to reach the optimal test position, ensuring that the entire test device can accurately simulate the real vehicle environment. The back-positioning force measuring mechanism 6 interacts with the simulated hood 4, enabling accurate measurement of relevant forces and effective testing of anti-theft strength. All parts are interconnected and cooperate with each other, forming a complete and fully functional overall structure of the test device.

[0033] This embodiment represents only a preferred implementation of the pedestrian protection lifting platform test device of this utility model. Any lifting platform test device designed with similar technical features to this utility model will fall within the protection scope of the pedestrian protection lifting platform test device of this utility model.

[0034] Example 2

[0035] This embodiment provides a test device for a pedestrian protection lifting device, including a test bench 2. A simulated engine hood 4 is provided on the test bench 2. The front and rear ends of the simulated engine hood are respectively provided with a locking and up-down adjustment mechanism 3, a front-back and left-right adjustment mechanism 5, and the simulated engine hood is also connected to a back-positioning force measuring mechanism 6.

[0036] The simulated hood 4 has the same mass as the hood, and the material and shape of the main structure are also the same as the hood, so as to ensure that its physical properties such as weight and strength are close to the actual situation, and to ensure that its aerodynamic performance and cooperation with other components during the test are close to the actual vehicle.

[0037] The locking and adjusting mechanism 3 includes a base 1, which is fixed to the workbench 2 by bolts. A vertically arranged adjusting screw 7 is fixed on the base 1. A first screw nut is provided on the adjusting screw 7. The first screw nut is fixedly connected to a locking buckle. The adjusting screw 7 is connected to a first handwheel 8. The first handwheel 8 is coaxial with the adjusting screw 7 or the axis of the first handwheel 8 is perpendicular to the adjusting screw 7. If the axis of the first handwheel 8 is perpendicular to the adjusting screw 7, a pair of meshing bevel gears are used to achieve transmission.

[0038] The locking and adjusting mechanism 3 also includes an adjusting frame 9 and a guide rod 10. The adjusting frame 9 is fixedly connected to the lead screw nut. The locking 11 is fixed on the adjusting frame 9. The guide rod 10 is arranged on both sides of the adjusting lead screw 7. The guide rod 10 is parallel to the adjusting lead screw 7, and the bottom end of the guide rod 10 is fixedly connected to the base 1. The guide rod 10 passes through the adjusting frame 9. The first lead screw nut drives the adjusting frame 9 to move up and down along the guide rod 10. The locking is fixedly arranged on the adjusting frame 9.

[0039] The up-and-down adjusting screw 7 achieves precise height adjustment through threaded engagement. The first handwheel 8 allows the operator to easily rotate the up-and-down adjusting screw 7 to make fine or large adjustments to the height of the locking buckle 11, thereby achieving flexible adjustment of the height of the simulated engine hood 4. The guide rod 10 and other guiding components play a key guiding role, ensuring that each component moves stably along the predetermined direction during the adjustment process, avoiding deviation or jamming.

[0040] This embodiment represents only a preferred implementation of the pedestrian protection lifting platform test device of this utility model. Any lifting platform test device designed with similar technical features to this utility model will fall within the protection scope of the pedestrian protection lifting platform test device of this utility model.

[0041] Example 3

[0042] This embodiment provides a test device for a pedestrian protection lifting device, including a test bench 2. A simulated engine hood 4 is provided on the test bench 2. The front and rear ends of the simulated engine hood are respectively provided with a locking and up-down adjustment mechanism 3, a front-back and left-right adjustment mechanism 5, and the simulated engine hood is also connected to a back-positioning force measuring mechanism 6.

[0043] The locking and up-down adjustment mechanism 3 includes a base 1, which is fixed to the workbench 2 by bolts. A vertically arranged up-down adjustment screw 7 is fixed on the base 1. A first screw nut is provided on the up-down adjustment screw 7. The first screw nut is fixedly connected to the locking mechanism. A first handwheel 8 is connected to the up-down adjustment screw 7. A hook 12 is fixed to the front end of the simulated engine hood. The hook 12 matches the locking mechanism.

[0044] The simulated hood 4 is connected and locked to the latch and the height adjustment mechanism 3 via the hook 12 at the bottom front. This connection method is simple and efficient, just like the cooperation between the hood and the front latch in a real car, ensuring that the front position is fixed and the height can be flexibly adjusted according to the test requirements.

[0045] This embodiment represents only a preferred implementation of the pedestrian protection lifting platform test device of this utility model. Any lifting platform test device designed with similar technical features to this utility model will fall within the protection scope of the pedestrian protection lifting platform test device of this utility model.

[0046] Example 4

[0047] This embodiment provides a test device for a pedestrian protection lifting device, including a test bench 2. A simulated engine hood 4 is provided on the test bench 2. The front and rear ends of the simulated engine hood are respectively provided with a locking and up-down adjustment mechanism 3, a front-back and left-right adjustment mechanism 5, and the simulated engine hood is also connected to a back-positioning force measuring mechanism 6.

[0048] The locking and up-down adjustment mechanism 3 includes a base 1, which is fixed to the workbench 2 by bolts. A vertically arranged up-down adjustment screw 7 is fixed on the base 1. A first screw nut is provided on the up-down adjustment screw 7. The first screw nut is fixedly connected to the locking mechanism. A first handwheel 8 is connected to the up-down adjustment screw 7. A hook 12 is fixed to the front end of the simulated engine hood. The hook 12 matches the locking mechanism.

[0049] The front-to-back and left-to-right adjustment mechanism 5 includes a front-to-back adjustment screw 13, which is parallel to the length direction of the simulated engine hood 4. A second screw nut is provided on the front-to-back adjustment screw 13, and a connecting seat 14 is fixedly connected to the second screw nut. A guide rail 15 is provided on the connecting seat 14, and two sliders 16 are provided on the guide rail 15. The two sliders 16 are respectively engaged with the two sides of the rear end of the simulated engine hood 4.

[0050] The front and rear adjusting screw 13 is connected to a second handwheel 17. Fixed seats 18 are provided at both ends of the front and rear adjusting screw 13. The fixed seats 18 are fixed to the workbench 2 of the frame by bolts.

[0051] The simulated hood 4 is closely connected to the rear end and the front-to-back and left-to-right adjustment mechanism 5. According to the specifications of the hood, the front-to-back position can be flexibly adjusted with the help of the adjustment mechanism so that it can be in the most suitable position on the test bench, thereby simulating the various actual states of the hoods of different models on the real vehicle.

[0052] When the operator turns the second handwheel 17, it can drive the front and rear adjusting screw 13 to rotate, thereby causing the connecting seat 14 to move along the screw, thus realizing the front and rear position adjustment of the rear end of the simulated hood 4, meeting the position adjustment requirements caused by the difference in hood length of different models; the slider 16 can slide left and right on the guide rail 15 to ensure that the simulated hood 4 can adapt to the size requirements of different models in both length and width directions, so that the entire test device can more accurately simulate various real vehicle environments, providing more comprehensive and accurate conditions for the performance test of the lifter.

[0053] This embodiment represents only a preferred implementation of the pedestrian protection lifting platform test device of this utility model. Any lifting platform test device designed with similar technical features to this utility model will fall within the protection scope of the pedestrian protection lifting platform test device of this utility model.

[0054] Example 5

[0055] This embodiment provides a test device for a pedestrian protection lifting device, including a test bench 2. A simulated engine hood 4 is provided on the test bench 2. The front and rear ends of the simulated engine hood are respectively provided with a locking and up-down adjustment mechanism 3, a front-back and left-right adjustment mechanism 5, and the simulated engine hood is also connected to a back-positioning force measuring mechanism 6.

[0056] The return force measuring mechanism 6 includes a hinge fastener 19, an automotive hinge 20, a lifter 21, and multiple pressure sensors 22. The hinge fastener is fixed on the workbench 2. One end of the automotive hinge 20 is connected to the simulated hood 4, and the other end is rotatably connected to the hinge fastener 19. The lifter 21 is fixed under the simulated hood. The pressure sensors 22 are respectively set at the contact position between the simulated hood 4 and the lifter 21, the connection position between the simulated hood 4 and the automotive hinge 20, and the connection point between the automotive hinge 20 and the hinge fastener 19.

[0057] The force measurement mechanism 6 also includes a cylinder mounting bracket disposed on the outside of the simulated engine hood 4. The cylinder mounting bracket includes a connecting base 23 fixed on the bench worktable 2. The connecting base 23 is connected to a clamp 24 via a spherical bearing. The clamp 24 holds the cylinder 25.

[0058] The top of the lifter 21 is in direct contact with or connected to the simulated engine hood 4;

[0059] When the top of the lifter 21 directly contacts the simulated hood 4, the top of the piston rod of the lifter 21 is a flat contact surface, allowing it to directly contact the bottom plane of the simulated hood. To increase contact stability and friction, the top of the lifter 21 can be designed with rubber, anti-slip texture, etc., to prevent slippage during the lifting process. During installation, it is necessary to ensure that the contact position between the lifter 21 and the bottom of the simulated hood is accurate. Generally, a positioning groove or marking point is preset on the bottom of the simulated hood to ensure precise installation of the lifter 21. This direct contact method has a simple structure and is easy to install. It is suitable for tests where the requirements for the movement trajectory of the simulated hood are relatively low, and it can directly transmit the lifting force to the simulated hood to achieve a rapid lifting operation.

[0060] When the lifter 21 is connected to the simulated hood 4, a connecting block is fixed to the lower surface of the simulated hood 4. The top of the piston rod of the lifter 21 is connected to the connecting block via a ball joint and a pin. The ball joint connection allows the piston rod of the lifter 21 to swing freely in multiple directions, adapting to angle changes caused by uneven force or structural deformation during the lifting process of the simulated hood. The pin connection ensures the reliability of the connection by passing the pin through the top of the piston rod of the lifter 21 and the connecting block, and fixing it with a cotter pin or snap ring, while allowing the piston rod to rotate around the pin at a certain angle. This movable connection method effectively avoids stress concentration caused by rigid connections, ensuring that the simulated hood 4 rises smoothly. It is often used in test scenarios where the flexibility of the simulated hood's movement is highly required.

[0061] The lifter 21 is connected to the simulated hood 4 and provides stable and reliable power for the lifting action of the simulated hood 4 during operation, ensuring the smooth lifting process. The pressure sensor 22 can accurately collect data such as product explosion and return force. Through this close and reasonable connection and interaction between the components, it provides strong data support for evaluating the performance of the lifter in pedestrian protection.

[0062] This embodiment represents only a preferred implementation of the pedestrian protection lifting platform test device of this utility model. Any lifting platform test device designed with similar technical features to this utility model will fall within the protection scope of the pedestrian protection lifting platform test device of this utility model.

[0063] Example 6

[0064] This embodiment provides a test apparatus for a pedestrian protection lifting device, such as... Figure 1 As shown, including as Figure 2 The table 2 shown has a simulated engine hood 4. The front and rear ends of the simulated engine hood are respectively equipped with a locking mechanism and an up-and-down adjustment mechanism 3, and a front-and-back and left-and-right adjustment mechanism 5. The simulated engine hood is also connected to a back-positioning force measuring mechanism 6.

[0065] like Figure 3 As shown, the locking and up-down adjustment mechanism 3 includes a base 1, which is fixed to the workbench 2 by bolts. A vertically arranged up-down adjustment screw 7 is fixed on the base 1. A first screw nut is provided on the up-down adjustment screw 7. The first screw nut is fixedly connected to the locking buckle. The up-down adjustment screw 7 is connected to a first handwheel 8.

[0066] The locking and adjusting mechanism 3 also includes an adjusting frame 9 and a guide rod 10. The adjusting frame 9 is fixedly connected to the lead screw nut. The locking 11 is fixed on the adjusting frame 9. The guide rod 10 is arranged on both sides of the adjusting lead screw 7. The guide rod 10 is parallel to the adjusting lead screw 7, and the bottom end of the guide rod 10 is fixedly connected to the base 1. The guide rod 10 passes through the adjusting frame 9. The first lead screw nut drives the adjusting frame 9 to move up and down along the guide rod 10. The locking is fixedly arranged on the adjusting frame 9.

[0067] like Figure 4 As shown, a hook 12 is fixed to the front end of the simulated engine hood 4, and the hook 12 matches the latch.

[0068] like Figure 5 As shown, the front-to-back and left-to-right adjustment mechanism 5 includes a front-to-back adjustment screw 13, which is parallel to the length direction of the simulated engine hood 4. A second screw nut is provided on the front-to-back adjustment screw 13, and a connecting seat 14 is fixedly connected to the second screw nut. A guide rail 15 is provided on the connecting seat 14, and two sliders 16 are provided on the guide rail 15. The two sliders 16 are respectively engaged with the two sides of the rear end of the simulated engine hood 4. A second handwheel 17 is connected to the front-to-back adjustment screw 13, and fixed seats 18 are provided at both ends of the front-to-back adjustment screw 13. The fixed seats 18 are fixed to the workbench 2 by bolts.

[0069] The return force measuring mechanism 6 includes a hinge fastener 19, an automotive hinge 20, a lifter 21, and multiple pressure sensors 22. The hinge fastener is fixed on the workbench 2. One end of the automotive hinge 20 is connected to the simulated hood 4, and the other end is rotatably connected to the hinge fastener 19. The lifter 21 is fixed under the simulated hood. The pressure sensors 22 are respectively set at the contact position between the simulated hood 4 and the lifter 21, the connection position between the simulated hood 4 and the automotive hinge 20, and the connection point between the automotive hinge 20 and the hinge fastener 19.

[0070] As shown in Figures 6(a)-6(b), the back-positioning force measuring mechanism 6 also includes a cylinder mounting bracket disposed on the outside of the simulated engine hood 4. The cylinder mounting bracket includes a connecting base 23 fixed on the workbench 2. The connecting base 23 is connected to a clamp 24 via a spherical bearing. The clamp 24 holds the cylinder 25. An angle sensor is disposed on the clamp 24. The angle sensor is used to monitor the tilt angle of the cylinder 25 applying force. An inclination sensor or a Hall effect angle sensor can be used.

[0071] The lifting device 21 is fixed on the workbench 2 by a fixed bracket. The fixed bracket is equipped with a displacement sensor, which can be a laser displacement sensor or a linear variable differential transformer (LVDT) displacement sensor. The displacement sensor monitors the lifting height of the lifting device 21. The top of the lifting device 21 is in direct contact or connected to the simulated engine hood 4.

[0072] When the lifter 21 is connected to the simulated engine hood 4, a connecting block is fixed on the lower surface of the simulated engine hood 4, and the top of the piston rod of the lifter 21 is connected to the connecting block through a ball joint and a pin.

[0073] This embodiment represents only a preferred implementation of the pedestrian protection lifting platform test device of this utility model. Any lifting platform test device designed with similar technical features to this utility model will fall within the protection scope of the pedestrian protection lifting platform test device of this utility model.

[0074] The working principle of this pedestrian protection lifting device test bench is as follows:

[0075] When testing the return force, cylinder 25 first extends and presses down toward the force measuring part. As the force measuring device continues to press down, cylinder 25 continues to press down, and related components such as the lifter 21 connected to the simulated engine hood 4 begin to be subjected to force, thus producing corresponding changes. The pressure sensor located at the pressure monitoring position collects pressure data and outputs force value signals. The displacement sensor measures the lifting height of the lifter 21, and the angle sensor monitors the tilt angle of the cylinder applying force.

[0076] Interaction between pressure sensor 22 and lifter 21:

[0077] 1) Force transmission and feedback: When the lifter 21 is working, it will generate an upward or downward force to lift or lower the simulated engine hood 4. When the lifter 21 moves, the force transmitted to the pressure sensor 22 through the hinge fastener will change. The pressure sensor 22 can accurately measure the magnitude and change of these forces and feed back the relevant electrical signals to the control system.

[0078] 2) Position and Status Monitoring: The pressure sensor 22, in conjunction with the lifter 21, can indirectly monitor the position and status of the simulated hood 4. Because there is a certain correlation between the extension or retraction of the lifter 21 and the pressure applied to the pressure sensor 22, by analyzing the data from the pressure sensor 22, the working status of the lifter 21 can be inferred, thereby understanding whether the simulated hood 4 is in the correct position and whether it is raising and lowering normally.

[0079] Interaction between pressure sensor 22 and simulated hood 4:

[0080] 1) Simulated Collision Detection: When the simulated hood 4 is subjected to an external force, such as a simulated vehicle collision, the force is transmitted to the pressure sensor 22 through the hinge fastener. The pressure sensor 22 can quickly sense the magnitude and duration of this impact force and transmit the data to the control system for evaluation of the intensity and effect of the simulated collision.

[0081] 2) Hood Attitude Sensing: When the simulated hood 4 is at different opening angles and positions, it will generate different pressure distributions on the hinge fasteners. Pressure sensor 22 can detect these pressure changes, thereby providing the control system with information about the attitude of the simulated hood 4. This helps to accurately control and monitor the state of the simulated hood in simulation experiments, ensuring the accuracy and repeatability of the experiments.

Claims

1. A test apparatus for a jacking device used for pedestrian protection, characterized in that, Includes a bench workbench (2), on which a simulated engine hood (4) is provided. The front and rear ends of the simulated engine hood (4) are respectively provided with a locking and up-down adjustment mechanism (3), a front-back and left-right adjustment mechanism (5), and the simulated engine hood (4) is also connected to a back-positioning force measuring mechanism (6).

2. The pedestrian protection lifting device test stand according to claim 1, characterized in that, The locking mechanism and the up-down adjustment mechanism (3) includes a base (1), which is fixed to the workbench (2) by bolts. A vertically arranged up-down adjustment screw (7) is fixed on the base (1). A first screw nut is provided on the up-down adjustment screw (7). The first screw nut is fixedly connected to a locking buckle. The up-down adjustment screw (7) is connected to a first handwheel (8).

3. The pedestrian protection lifting device test stand according to claim 2, characterized in that, The locking and adjusting mechanism (3) further includes an adjusting frame (9) and a guide rod (10). The adjusting frame (9) is fixedly connected to the first lead screw nut. The locking (11) is fixed on the adjusting frame (9). The guide rod (10) is arranged on both sides of the adjusting lead screw (7). The guide rod (10) is parallel to the adjusting lead screw (7), and the bottom end of the guide rod (10) is fixedly connected to the base (1). The guide rod (10) passes through the adjusting frame (9). The first lead screw nut drives the adjusting frame (9) to move up and down along the guide rod (10). The locking is fixedly arranged on the adjusting frame (9).

4. The pedestrian protection lifting device test stand according to claim 2, characterized in that, The front end of the simulated engine hood is fixed with a hook (12), which matches the latch.

5. The pedestrian protection lifting device test stand according to claim 2, characterized in that, The front-to-back and left-to-right adjustment mechanism (5) includes a front-to-back adjustment screw (13), which is parallel to the length direction of the simulated engine hood (4). A second screw nut is provided on the front-to-back adjustment screw (13), and a connecting seat (14) is fixedly connected to the second screw nut. A guide rail (15) is provided on the connecting seat (14), and two sliders (16) are provided on the guide rail (15). The two sliders (16) are respectively engaged on both sides of the rear end of the simulated engine hood (4).

6. The pedestrian protection lifting device test stand according to claim 5, characterized in that, The front and rear adjusting screw (13) is connected to a second handwheel (17), and fixed seats (18) are provided at both ends of the front and rear adjusting screw (13). The fixed seats (18) are fixed to the workbench (2) by bolts.

7. The pedestrian protection lifting device test stand according to claim 1, characterized in that, The force measurement mechanism (6) includes a hinge fastener (19), an automotive hinge (20), a lifter (21), and multiple pressure sensors (22). The hinge fastener is fixed on the workbench (2). One end of the automotive hinge (20) is connected to the simulated hood (4), and the other end is rotatably connected to the hinge fastener (19). The lifter (21) is fixed below the simulated hood. The pressure sensors (22) are respectively set at the contact position between the simulated hood (4) and the lifter (21), the connection position between the simulated hood (4) and the automotive hinge (20), and the connection point between the automotive hinge (20) and the hinge fastener (19). The force measurement mechanism (6) also includes a cylinder mounting bracket set on the outside of the simulated engine hood (4). The cylinder mounting bracket includes a connecting base (23) fixed on the bench worktable (2). The connecting base (23) is connected to a clamp (24) via a spherical bearing. The clamp (24) holds the cylinder (25).

8. The pedestrian protection lifting device test stand according to claim 7, characterized in that, The lifting device (21) is fixed on the workbench (2) by a fixed bracket. The fixed bracket is equipped with a displacement sensor, which monitors the lifting height of the lifting device (21).

9. The pedestrian protection lifting device test stand according to claim 7, characterized in that, An angle sensor is provided on the clamp (24).

10. The pedestrian protection lifting device test stand according to claim 7, characterized in that, The top of the lifter (21) is in direct contact or connected to the simulated engine hood (4); When the lifter (21) is connected to the simulated engine cover (4), a connecting block is fixed on the lower surface of the simulated engine cover (4), and the top of the piston rod of the lifter (21) is connected to the connecting block through a ball joint and a pin.

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