A new energy vehicle chassis test experiment floating support mechanism

Abstract

This invention provides a floating support mechanism for testing the chassis of new energy vehicles, relating to the field of chassis testing technology. It includes a chassis testing device that, through the cooperation of an adaptive multi-directional support structure, vehicle testing components, and an explosion-proof structure, achieves automatic wheel repositioning after wheel misalignment. The lateral movement of the lateral load platform drives the baffle to move closer to the misaligned wheel, while the vertical movement of the vertical load platform causes the square airbag to inflate and deploy. The baffle and square airbag of the adaptive multi-directional support structure move synchronously towards the misaligned wheel, with the square airbag first flexibly contacting the misaligned wheel. Simultaneously, the vibration force generated by the vertical and lateral load platforms driving the chassis during testing serves as auxiliary power, combined with the rigid thrust of the baffle moving towards the tire and the flexible pushing force of the square airbag. These three forces work together to complete wheel repositioning and correction, effectively solving the problems of easy wheel misalignment, cumbersome repositioning, and abnormal vehicle posture during chassis testing.

Description

Technical Field

[0001] This invention belongs to the field of chassis testing technology, and more specifically, relates to a floating support mechanism for testing chassis of new energy vehicles. Background Technology

[0002] New energy vehicle chassis testing is a core part of new energy vehicle R&D verification and factory quality inspection. It mainly tests the chassis structural strength, stability and dynamic performance by simulating different loads, vibrations and driving conditions to ensure that all chassis indicators meet safety and usage requirements.

[0003] A search of Chinese patent publication number "CN109141926B" reveals "A load testing device for a new energy vehicle chassis". This device uses a test ramp to facilitate the smooth entry of the new energy vehicle chassis to be tested into the test area. At the same time, adjustable limit devices are set at both ends of the test ramp to effectively limit the chassis. After the chassis has completed the test, the limit devices can be quickly released to facilitate the testing of the next chassis, resulting in high testing efficiency.

[0004] Based on the above search and existing technology, it was found that: the device mainly relies on the limiting device to realize the chassis entry and exit limit and rapid switching, focusing on improving the test flow efficiency. However, under actual multi-directional and variable amplitude load test conditions, the wheels are prone to deviate from the test center reference position after the chassis is subjected to force, which will cause abnormal vehicle body posture and affect the authenticity and accuracy of test data. The device cannot automatically reset the deviated wheels and requires manual assistance to adjust them. The operation is cumbersome and interrupts the test process, making it difficult to meet the use requirements of high-precision and continuous chassis testing. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a floating support mechanism for testing new energy vehicle chassis.

[0006] A floating support mechanism for testing the chassis of a new energy vehicle includes a chassis testing device. Actuator receiving slots are provided at the four corners of the chassis testing device. Side mounting cavities are provided on both sides of each actuator receiving slot. Tracks are symmetrically fixedly installed on the upper end of the chassis testing device, located outside the actuator receiving slots. A vertical actuator assembly is configured inside each actuator receiving slot. A vertical load platform is mounted on the upper end of each vertical actuator assembly. A lateral actuator is connected to the inner side of the vertical load platform. A lateral load platform is mounted on the upper end of each lateral actuator. The vertical actuator assembly, vertical load platform, lateral actuator, and lateral load platform together constitute a vehicle testing component, used to drive the wheels of the test vehicle to move vertically and horizontally. A protective cover is fixedly installed on the upper end of each side mounting cavity.

[0007] Preferably, the vertical actuator assembly has a follower structure on its inner side;

[0008] The follower structure includes a floating mounting frame. Each side mounting cavity has a sliding column assembly fixedly installed inside. Each floating mounting frame has a first connecting seat symmetrically fixedly installed at its upper end. Each first connecting seat has a first slide rail symmetrically fixedly installed at its lower end. A first hydraulic cylinder is fixedly installed at its upper end. A transmission plate is fixedly installed on the piston rod of the first hydraulic cylinder. Each floating mounting frame is fixedly located outside the vertical actuator assembly and its two ends extend into the side mounting cavity. The sliding column assembly is slidably installed with the floating mounting frame. The first slide rail is slidably installed with the sliding column assembly. The transmission plate is parallel to the transverse load table.

[0009] Preferably, the follower structure is provided with an adaptive multi-directional support structure;

[0010] The adaptive multi-directional support structure includes a first hydraulic balancer, each of which is located above a first hydraulic cylinder. A second connecting seat is fixedly installed at the upper end of each first hydraulic cylinder. A second hydraulic cylinder is symmetrically fixedly installed at the upper end of each second connecting seat. A baffle is fixedly installed between each pair of piston rods of the second hydraulic cylinders. The baffles are located on both sides of the transverse load platform. A first oil pipe is provided between the inlet of each first hydraulic balancer and the outlet of each first hydraulic cylinder. A second oil pipe is provided between the outlet of each first hydraulic balancer and the inlet of each second hydraulic cylinder. A cylinder is fixedly installed inside each side mounting cavity. A piston assembly is slidably installed inside each cylinder. A limiting slide plate is fixedly installed at the end of each piston assembly. A square airbag is provided on the side wall of each baffle. A first air pipe is provided between the air inlet of each square airbag and the air outlet of each cylinder. A sliding sleeve is fixedly installed at the lower end of each first hydraulic cylinder. A limiting groove is formed inside each sliding sleeve, and each limiting groove is slidably installed with the limiting slide plate.

[0011] Preferably, the adaptive multi-directional support structure is provided with a triangular support hydraulic structure;

[0012] The triangular support hydraulic structure includes a third hydraulic cylinder, each of which is fixedly mounted above the second connecting seat. The piston rod of the third hydraulic cylinder faces the opposite direction to the piston rod of the second hydraulic cylinder. A third oil pipe is provided between the inlet of each third hydraulic cylinder and the outlet of the first hydraulic balancer. A second slide rail is symmetrically fixedly mounted on the upper end of each second connecting seat. A sliding seat is slidably mounted between each set of second slide rails. Each sliding seat is fixedly mounted to the piston rod of the third hydraulic cylinder. A triangular connecting rod is symmetrically fixedly mounted between each baffle and the sliding seat.

[0013] Preferably, the follow-up structure and the chassis testing device are equipped with an explosion-proof structure;

[0014] The explosion-proof structure includes an outer frame, each of which is installed on the upper end of the first connecting seat. A second hydraulic balancer is fixedly installed on the upper end of each outer frame. A fourth oil pipe is provided between the inlet of each second hydraulic balancer and the pressure relief port of the second hydraulic cylinder. An air cylinder and a hydraulic cylinder are fixedly installed on the upper end of each side mounting cavity. A pneumatic elastic piston assembly is provided inside the air cylinder, and a hydraulic elastic piston assembly is provided inside the hydraulic cylinder. A fifth oil pipe is provided between the outlet of the second hydraulic balancer and the inlet of the hydraulic cylinder. A second air pipe is provided between the first air pipe and the air inlet of the air cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In this invention, by setting a follower structure inside the vertical actuator group, when the vertical actuator group drives the vehicle test component to move up and down, the floating mounting frame moves synchronously along the axial direction of the sliding column group, and the first slide rail slides synchronously under the limiting guidance of the sliding column group. This enables the synchronous movement of the follower structure and the vehicle test component, ensuring the stability of the floating mounting frame's movement and avoiding displacement deviation of the follower structure. This, in turn, ensures that the subsequent adaptive multi-directional support structure and triangular support hydraulic structure can always maintain the corresponding position with the wheel, providing stable support for the subsequent limiting and resetting functions.

[0017] In this invention, by setting an adaptive multi-directional support structure on the follower structure, when the lateral actuator drives the lateral load platform to move laterally, the side wall of the lateral load platform will squeeze the transmission plate on one side. After being subjected to force, the transmission plate squeezes the hydraulic oil inside the first hydraulic cylinder. The hydraulic oil is transported to the first hydraulic balancer through the first oil pipe and is evenly distributed. Then it is transported to the second hydraulic cylinder through the second oil pipe, pushing the piston rod of the second hydraulic cylinder to extend, driving the baffle to move closer to the wheel side and form a lateral limit. When the vertical actuator assembly drives the vertical load platform to move vertically, the floating mounting frame of the follower structure moves vertically synchronously, driving the first hydraulic cylinder and the sliding sleeve to move synchronously. Then, through the limit slide plate and piston assembly, the gas in the cylinder is transported to the square airbag through the first air pipe, causing the square airbag to inflate. The opening and forming of vertical auxiliary limit, and the greater the lateral movement of the lateral load platform, the greater the force of squeezing the transmission plate, the greater the hydraulic oil pressure output by the first hydraulic cylinder, the greater the movement distance of the baffle, the greater the vertical movement of the vertical load platform, the greater the sliding distance of the sliding sleeve driving the limit slide plate and piston assembly, the greater the gas discharge in the cylinder, and the greater the expansion degree of the square airbag, thus achieving adaptive multi-directional support limit, making the limit range adapt to the movement range of the chassis test, ensuring that the wheel can be reliably limited during lateral and vertical tests of different ranges, effectively avoiding wheel deviation and falling, solving the problems of fixed limit range of traditional support structures, inability to adapt to multi-range tests, and insufficient limit reliability, and improving the safety and stability of the chassis test process.

[0018] In this invention, by setting a sliding sleeve, a limiting groove, and a limiting slide plate in the adaptive multi-directional support structure, when the vertical actuator assembly drives the vertical load platform to move vertically by a small amplitude, the floating mounting frame of the follower structure drives the first hydraulic cylinder and the sliding sleeve to rise synchronously by a small amplitude. At this time, the rising amplitude of the sliding sleeve is less than the depth of the limiting groove, and the sliding sleeve will not contact the limiting slide plate during its upward movement. The limiting groove cannot support the limiting slide plate, the piston assembly remains in its initial position in the cylinder without sliding, the gas in the cylinder does not flow, and the square airbag remains in its initial state without activation. When the vertical actuator assembly drives the vertical load platform to move vertically by a large amplitude, the rising amplitude of the sliding sleeve is greater than the depth of the limiting groove. After the sliding sleeve moves upward and contacts the bottom inner wall of the limiting groove, it continues to rise. The limiting slide plate moves upward by being supported by the limiting slide groove, which drives the piston assembly to slide inside the cylinder, compressing the gas in the cylinder and delivering it to the square airbag, causing the square airbag to inflate. This allows for selective activation of the square airbag, avoiding frequent inflation of the airbag. On the one hand, this reduces the number of times the square airbag is inflated, reducing airbag wear and gas consumption, extending the life of the airbag, and lowering the maintenance cost of the device. On the other hand, since small vertical rises and falls will not cause wheel deviation, there is no need to activate the airbag for limiting, avoiding unnecessary airbag activation that could cause unnecessary interference to the wheel and not affect the normal conduct of small-amplitude tests. However, when moving vertically, the wheel is prone to deviation, and in this case, the airbag is activated for flexible limiting to adapt to the limiting requirements of different amplitude tests.

[0019] In this invention, a triangular support hydraulic structure is set on an adaptive multi-directional support structure. When the lateral actuator drives the lateral load platform to move laterally, the lateral load platform squeezes the transmission plate, causing the hydraulic oil in the first hydraulic cylinder to generate pressure and be transported to the first hydraulic balancer through the first oil pipe. The first hydraulic balancer evenly divides the hydraulic oil into two paths to achieve synchronous drive and reverse cooperation. One path of hydraulic oil is transported to the second hydraulic cylinder through the second oil pipe. The pressure of the hydraulic oil pushes the piston rod of the second hydraulic cylinder to extend towards the wheel, directly driving the baffle to move closer to the wheel side, thereby achieving lateral limitation of the wheel. The distance the baffle moves is precisely matched with the extension length of the piston rod of the second hydraulic cylinder. At the same time, the other path of hydraulic oil is transported to the third hydraulic cylinder through the third oil pipe. The pressure of the hydraulic oil drives the piston rod of the third hydraulic cylinder to move away from the vehicle. As the wheel retracts, it simultaneously pulls the sliding seat along the second slide rail away from the wheel. Since the angle of the triangular linkage remains constant, the triangular linkage always provides stable oblique support to the baffle at a fixed angle when the sliding seat slides. The greater the distance the baffle moves towards the wheel, the longer the piston rod of the second hydraulic cylinder extends, and the retraction distance of the piston rod of the third hydraulic cylinder also increases simultaneously. The sliding distance of the sliding seat increases accordingly. The bidirectional hydraulic drive, combined with the fixed-angle triangular linkage support, not only ensures that the baffle receives stable and uniform support force throughout the entire process of moving towards the wheel and limiting its position, effectively enhancing the structural rigidity and limiting stability of the baffle, but also balances the wheel reaction force on the baffle through the reverse pulling force, preventing the baffle from bending, deforming, or shifting due to simply being subjected to positive thrust or its own excessive extension distance.

[0020] In this invention, by setting an explosion-proof structure on the follow-up structure and chassis testing device, if the pressure exceeds a preset threshold when the baffle and square airbag push the wheel to reset, the hydraulic oil in the second hydraulic cylinder is transported to the second hydraulic balancer through the pressure relief port and the fourth oil pipe, and then to the hydraulic cylinder through the fifth oil pipe, pushing the hydraulic elastic piston assembly to move and realize hydraulic overload pressure relief. The gas in the square airbag is transported to the air cylinder through the second air pipe, pushing the pneumatic elastic piston assembly to move and realize pneumatic overload pressure relief. After the wheel resets, the hydraulic elastic piston assembly and the pneumatic elastic piston assembly reset under their own elastic restoring force, pushing the hydraulic oil and gas to flow back in the opposite direction to achieve return to their original positions. This can realize overload pressure relief of the hydraulic and pneumatic systems, preventing pipeline rupture, component damage or safety hazards caused by excessive pressure. At the same time, it realizes the automatic return of hydraulic oil and gas, allowing the device to quickly return to its initial state, solving the problem that pressure overload can easily cause safety accidents during the testing process.

[0021] In this invention, the automatic reset of a wheel after it has deviated is achieved through the cooperation of an adaptive multi-sided support structure, vehicle testing components, and an explosion-proof structure. After the chassis has undergone multiple tests of different amplitudes and directions, the wheel is prone to deviating on the lateral load platform and moving away from its central reference position. At this time, the lateral movement of the lateral load platform will drive the baffle to move closer to the side of the deviated wheel, and the vertical movement of the vertical load platform will cause the square airbag to expand and deploy. The baffle and the square airbag of the adaptive multi-sided support structure move synchronously towards the direction of the deviated wheel. The square airbag first flexibly resists the deviated wheel to avoid hard contact and damage to the wheel. At the same time, the vibration force generated by the vertical load platform and the lateral load platform driving the chassis during the test serves as an auxiliary power. Combined with the rigid thrust of the baffle moving towards the tire and the flexible pushing force of the square airbag, the three work together to push the wheel that has deviated from the center back to the central reference point of the lateral load platform, thus completing the wheel reset and correction. This effectively solves the problems of easy wheel deviation, cumbersome reset, and abnormal vehicle posture during chassis testing. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the chassis testing device of the present invention;

[0024] Figure 3 This is a planar sectional view of the present invention;

[0025] Figure 4 This is the present invention. Figure 3 Enlarged view of the structure at point A in the image;

[0026] Figure 5 This is a schematic diagram of the transverse load stage assembly structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the second tracheal assembly structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the external frame assembly structure of the present invention;

[0029] Figure 8 This is a cross-sectional view of the air cylinder and hydraulic cylinder of the present invention;

[0030] Figure 9 This is a schematic diagram of the first oil pipe assembly structure of the present invention;

[0031] Figure 10 This is a schematic diagram of the second connecting seat assembly structure of the present invention;

[0032] Figure 11 This is a cross-sectional view of the first connecting seat of the present invention;

[0033] Figure 12This is a three-dimensional structural diagram of the second connecting seat of the present invention.

[0034] In the figure, the correspondence between the component names and the attached drawing numbers is as follows: 11. Chassis testing device; 12. Side mounting cavity; 13. Actuator receiving slot; 14. Rail; 15. Protective cover; 16. Vertical actuator assembly; 17. Vertical load table; 18. Lateral actuator; 19. Lateral load table; 21. Floating mounting bracket; 22. Sliding column assembly; 23. First connecting seat; 24. First slide rail; 25. First hydraulic cylinder; 26. Transmission plate; 27. First hydraulic balancer; 28. Second connecting seat; 29. ​​Second hydraulic cylinder; 31. Baffle; 32. 33. First oil pipe; 34. Second oil pipe; 35. Cylinder; 36. Piston assembly; 37. Limiting slide plate; 38. Square air bag; 39. First air pipe; 40. Sliding sleeve; 41. Limiting slide groove; 42. Third hydraulic cylinder; 43. Third oil pipe; 44. Second slide rail; 45. Sliding seat; 46. Triangular connecting rod; 47. Outer frame; 48. Second hydraulic balancer; 49. Fourth oil pipe; 51. Air cylinder; 52. Hydraulic cylinder; 53. Pneumatic elastic piston assembly; 54. Hydraulic elastic piston assembly; 55. Fifth oil pipe; 56. Second air pipe. Detailed Implementation

[0035] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0036] Please see Figure 1 - Figure 12 This invention provides a floating support mechanism for testing the chassis of a new energy vehicle, including a chassis testing device 11. Actuator receiving slots 13 are provided at the four corners of the chassis testing device 11. Side mounting cavities 12 are provided on both sides of each actuator receiving slot 13. Rails 14 are symmetrically fixedly installed on the upper end of the chassis testing device 11, located outside the actuator receiving slots 13. A vertical actuator assembly 16 is configured inside each actuator receiving slot 13. A vertical load platform 17 is mounted on the upper end of the vertical actuator assembly 16. A lateral actuator 18 is connected to the inner side of the vertical load platform 17. A lateral load platform 19 is mounted on the upper end of the lateral actuator 18. The vertical actuator assembly 16, vertical load platform 17, lateral actuator 18, and lateral load platform 19 together constitute a vehicle testing component, used to drive the wheels of the test vehicle to move vertically and horizontally. A protective cover 15 is fixedly installed on the upper end of each side mounting cavity 12.

[0037] By setting up the chassis testing device 11, when in use, the staff will drive the test vehicle onto the device via the track 14, ensuring that the wheels are accurately placed in the center of the transverse load platform 19, then suspend and install the monitor, start the vertical actuator group 16 to move the vehicle test component up and down, start the transverse actuator 18 to move the vehicle test component left and right, set the movement amplitude and frequency, and check the monitor data, thereby realizing the performance testing of the automobile chassis under different vertical and transverse working conditions.

[0038] The vertical actuator assembly 16 has a follower structure inside, which includes a floating mounting frame 21. Each side mounting cavity 12 has a slide column assembly 22 fixedly installed inside. Each floating mounting frame 21 has a first connecting seat 23 symmetrically fixedly installed at the upper end. Each first connecting seat 23 has a first slide rail 24 symmetrically fixedly installed at the lower end. A first hydraulic cylinder 25 is fixedly installed at the upper end of the first connecting seat 23. A transmission plate 26 is fixedly installed on the piston rod of the first hydraulic cylinder 25. Each floating mounting frame 21 is fixedly located on the outside of the vertical actuator assembly 16 and its two ends extend into the side mounting cavity 12. The slide column assembly 22 is slidably installed with the floating mounting frame 21. The first slide rail 24 is slidably installed with the slide column assembly 22. The transmission plate 26 is parallel to the transverse load table 19.

[0039] By setting a follower structure inside the vertical actuator assembly 16, when the vertical actuator assembly 16 drives the vehicle test component to move up and down, the floating mounting frame 21 moves synchronously along the axial direction of the sliding column assembly 22, and the first slide rail 24 slides synchronously under the limiting guidance of the sliding column assembly 22. This enables the synchronous movement of the follower structure and the vehicle test component, ensuring the stability of the movement of the floating mounting frame 21 and avoiding displacement deviation of the follower structure. This ensures that the subsequent adaptive multi-directional support structure and triangular support hydraulic structure can always maintain the corresponding position with the wheel, providing stable support for the realization of subsequent limiting and reset functions.

[0040] The follow-up structure is equipped with an adaptive multi-directional support structure, which includes a first hydraulic balancer 27. Each first hydraulic balancer 27 is located above a first hydraulic cylinder 25. A second connecting seat 28 is fixedly installed on the upper end of each first hydraulic cylinder 25. A second hydraulic cylinder 29 is symmetrically fixedly installed on the upper end of each second connecting seat 28. A baffle 31 is fixedly installed between each pair of piston rods of the second hydraulic cylinder 29. The baffle 31 is located on both sides of the transverse load platform 19. A first oil pipe 32 is provided between the inlet of each first hydraulic balancer 27 and the outlet of the first hydraulic cylinder 25. A second oil pipe 33 is provided between the outlet of the first hydraulic cylinder 7 and the inlet of the second hydraulic cylinder 29. A cylinder 34 is fixedly installed inside each side mounting cavity 12. A piston assembly 35 is slidably installed inside each cylinder 34. A limiting slide plate 36 is fixedly installed at the end of each piston assembly 35. A square air bag 37 is provided on the side wall of each baffle 31. A first air pipe 38 is provided between the air inlet of each square air bag 37 and the air outlet of the cylinder 34. A sliding sleeve 39 is fixedly installed at the lower end of each first hydraulic cylinder 25. A limiting slide groove 41 is opened inside each sliding sleeve 39. Each limiting slide groove 41 is slidably installed with the limiting slide plate 36.

[0041] By setting an adaptive multi-directional support structure on the follower structure, when the lateral actuator 18 drives the lateral load platform 19 to move laterally, the side wall of the lateral load platform 19 will squeeze the transmission plate 26 on one side. After being subjected to force, the transmission plate 26 squeezes the hydraulic oil inside the first hydraulic cylinder 25. The hydraulic oil is transported to the first hydraulic balancer 27 through the first oil pipe 32 and is evenly distributed. Then it is transported to the second hydraulic cylinder 29 through the second oil pipe 33, pushing the piston rod of the second hydraulic cylinder 29 to extend, driving the baffle 31 to move closer to the wheel side and form a lateral limit. When the vertical actuator assembly 16 drives the vertical load platform 17 to move vertically, the floating mounting bracket 21 of the follower structure moves vertically in sync, driving the first hydraulic cylinder 25 and the sliding sleeve 39 to move synchronously. Then, through the limit slide plate 36 and the piston assembly 35, the gas in the cylinder 34 is transported to the square air bag 37 through the first air pipe 38. The movable square airbag 37 expands and forms a vertical auxiliary limit. The greater the lateral movement of the lateral load platform 19, the greater the force of the compression transmission plate 26, the greater the hydraulic oil pressure output by the first hydraulic cylinder 25, and the greater the movement distance of the baffle 31. The greater the vertical movement of the vertical load platform 17, the greater the sliding distance of the sliding sleeve 39 driving the limit slide plate 36 and piston assembly 35, the greater the amount of gas discharged from the cylinder 34, and the greater the expansion degree of the square airbag 37. This enables adaptive multi-directional support and limit, making the limit amplitude match the movement amplitude of the chassis test. This ensures that the wheels can be reliably limited during lateral and vertical tests of different amplitudes, effectively preventing wheel deviation and falling. It solves the problems of fixed limit amplitude, inability to adapt to multi-amplitude tests, and insufficient limit reliability of traditional support structures, and improves the safety and stability of the chassis testing process.

[0042] By incorporating a sliding sleeve 39, a limiting groove 41, and a limiting slide plate 36 in the adaptive multi-directional support structure, when the vertical actuator assembly 16 drives the vertical load platform 17 to make a small vertical movement, the floating mounting bracket 21 of the follower structure drives the first hydraulic cylinder 25 and the sliding sleeve 39 to rise synchronously with a small amplitude. At this time, the rise amplitude of the sliding sleeve 39 is less than the depth of the limiting groove 41, and the sliding sleeve 39 will not contact the limiting slide plate 36 during its upward movement. The limiting groove 41 cannot support the limiting slide plate 36, the piston assembly 35 remains in its initial position within the cylinder 34 without sliding, the gas within the cylinder 34 does not flow, and the square airbag 37 remains in its initial state without activation. When the vertical actuator assembly 16 drives the vertical load platform 17 to make a large vertical movement, the rise amplitude of the sliding sleeve 39 is greater than the depth of the limiting groove 41, and the sliding sleeve 39 moves upward until it touches the bottom inner wall of the limiting groove 41. After contact, the rising sliding sleeve 39 continues to move upward through the limiting slide groove 41, which in turn supports the limiting slide plate 36 to move upward. This causes the piston assembly 35 to slide inside the cylinder 34, compressing the gas inside the cylinder 34 and delivering it to the square airbag 37. This causes the square airbag 37 to inflate, thus enabling selective activation of the square airbag 37 and avoiding frequent inflation of the airbag. On the one hand, this reduces the number of inflations of the square airbag 37, reducing airbag wear and gas consumption, extending the service life of the airbag, and reducing the maintenance cost of the device. On the other hand, since small vertical rises and falls will not cause wheel deviation, there is no need to activate the airbag for limiting, avoiding unnecessary airbag activation that could cause unnecessary interference to the wheel and not affect the normal conduct of small-amplitude tests. However, when moving vertically with large amplitude, the wheel is prone to deviation. In this case, the airbag is activated for flexible limiting, adapting to the limiting requirements of different amplitude tests.

[0043] The adaptive multi-directional support structure is equipped with a triangular support hydraulic structure, which includes a third hydraulic cylinder 42. Each third hydraulic cylinder 42 is fixedly mounted above the second connecting seat 28. The piston rod of the third hydraulic cylinder 42 faces the opposite direction to the piston rod of the second hydraulic cylinder 29. A third oil pipe 43 is provided between the inlet of each third hydraulic cylinder 42 and the outlet of the first hydraulic balancer 27. A second slide rail 44 is symmetrically fixedly mounted on the upper end of each second connecting seat 28. A sliding seat 45 is slidably mounted between each set of second slide rails 44. Each sliding seat 45 is fixedly mounted between the piston rod of the third hydraulic cylinder 42. A triangular connecting rod 46 is symmetrically fixedly mounted between each baffle 31 and the sliding seat 45.

[0044] By setting a triangular support hydraulic structure on the adaptive multi-sided support structure, when the lateral actuator 18 drives the lateral load platform 19 to move laterally, the lateral load platform 19 squeezes the transmission plate 26, causing the hydraulic oil in the first hydraulic cylinder 25 to generate pressure and be transported to the first hydraulic balancer 27 through the first oil pipe 32. The first hydraulic balancer 27 evenly divides the hydraulic oil into two paths to achieve synchronous drive and reverse cooperation. One path of hydraulic oil is transported to the second hydraulic cylinder 29 through the second oil pipe 33. The pressure of the hydraulic oil pushes the piston rod of the second hydraulic cylinder 29 to extend towards the wheel, directly driving the baffle 31 to move closer to the wheel side, thereby achieving lateral limitation of the wheel. The distance that the baffle 31 moves is precisely matched with the extension length of the piston rod of the second hydraulic cylinder 29. At the same time, the other path of hydraulic oil is transported to the third hydraulic cylinder 42 through the third oil pipe 43. The pressure of the hydraulic oil drives the piston rod of the third hydraulic cylinder 42 to move away from the wheel. The sliding block 45 is pulled back in the direction of the wheel, and the sliding block 46 is pulled along the second slide rail 44 to slide away from the wheel. Since the angle of the triangular link 46 is fixed, the triangular link 46 always forms a stable oblique support for the baffle 31 at a fixed angle when the sliding block 45 slides. The greater the distance the baffle 31 moves towards the wheel, the longer the piston rod of the second hydraulic cylinder 29 extends, and the retraction distance of the piston rod of the third hydraulic cylinder 42 also increases synchronously. The sliding distance of the sliding block 45 increases accordingly. The bidirectional hydraulic drive, combined with the support of the triangular link 46 at a fixed angle, not only allows the baffle 31 to obtain a stable and uniform support force throughout the process of moving towards the wheel limit, effectively enhancing the structural rigidity and limit stability of the baffle 31, but also balances the wheel reaction force on the baffle 31 through the reverse pulling force, preventing the baffle 31 from bending, deforming, or shifting due to simply being subjected to positive thrust or its own excessive extension distance.

[0045] The follow-up structure and chassis testing device 11 are equipped with an explosion-proof structure, which includes an outer frame 47. Each outer frame 47 is installed on the upper end of the first connecting seat 23. A second hydraulic balancer 48 is fixedly installed on the upper end of each outer frame 47. A fourth oil pipe 49 is provided between the inlet of each second hydraulic balancer 48 and the pressure relief port of the second hydraulic cylinder 29. An air cylinder 51 and a hydraulic cylinder 52 are fixedly installed on the upper end of each side mounting cavity 12. A pneumatic elastic piston assembly 53 is provided inside the air cylinder 51, and a hydraulic elastic piston assembly 54 is provided inside the hydraulic cylinder 52. A fifth oil pipe 55 is provided between the outlet of the second hydraulic balancer 48 and the inlet of the hydraulic cylinder 52. A second air pipe 56 is provided between the first air pipe 38 and the air inlet of the air cylinder 51.

[0046] It should be noted that the explosion-proof structure is mainly designed for the second hydraulic cylinder 29, which may be directly impacted by the wheel, and the square airbag 37, which may rupture due to excessive air pressure. Since the third hydraulic cylinder 42 mainly bears tensile loads during operation, and its force is converted into a supporting torque on the baffle 31 through the triangular linkage 46, its internal pressure peak has a low correlation with dynamic impact. Therefore, no separate pressure relief device is provided. In embodiments with higher safety requirements, a similar pressure relief circuit can be provided for the third hydraulic cylinder 42 and connected to the hydraulic cylinder 52.

[0047] By setting an explosion-proof structure on the follow-up structure and chassis testing device 11, when the baffle 31 and square airbag 37 push the wheel to reset, if the pressure is too high and exceeds the preset threshold, the hydraulic oil in the second hydraulic cylinder 29 is transported to the second hydraulic balancer 48 through the pressure relief port and the fourth oil pipe 49, and then to the hydraulic cylinder 52 through the fifth oil pipe 55, which pushes the hydraulic elastic piston assembly 54 to move to realize hydraulic overload pressure relief. The gas in the square airbag 37 is transported to the air cylinder 51 through the second air pipe 56, which pushes the pneumatic elastic piston assembly 53 to move to realize pneumatic overload pressure relief. After the wheel is reset, the hydraulic elastic piston assembly 54 and the pneumatic elastic piston assembly 53 reset under their own elastic restoring force, pushing the hydraulic oil and gas to flow back in the opposite direction to realize the return to their original positions. This can realize the overload pressure relief of the hydraulic and pneumatic systems, prevent pipeline rupture, component damage or safety hazards caused by excessive pressure, and realize the automatic return of hydraulic oil and gas, so that the device can quickly return to the initial state, solving the problem that pressure overload can easily cause safety accidents during the test.

[0048] By combining the adaptive multi-sided support structure, vehicle testing components, and explosion-proof structure, automatic reset of the wheel after deviation is achieved. After the chassis has undergone multiple tests of different amplitudes and directions, the wheel is prone to deviation on the lateral load platform 19, deviating from its central reference position. At this time, the lateral movement of the lateral load platform 19 will drive the baffle 31 to move closer to the deviated wheel side, and the vertical movement of the vertical load platform 17 will cause the square airbag 37 to inflate and deploy. The baffle 31 and the square airbag 37 of the adaptive multi-sided support structure move synchronously towards the deviated wheel. The square airbag 37 first flexibly resists the deviated wheel to avoid hard contact damage to the wheel. At the same time, the vibration force generated by the vertical load platform 17 and the lateral load platform 19 driving the chassis during the test serves as an auxiliary power. Combined with the rigid thrust of the baffle 31 moving towards the tire and the flexible pushing force of the square airbag 37, the three work together to push the wheel that has deviated from the center back to the central reference point of the lateral load platform 19, completing the wheel reset and correction. This effectively solves the problems of easy wheel deviation, cumbersome reset, and abnormal vehicle posture during chassis testing.

[0049] Working principle:

[0050] The first step involves the staff driving the test new energy vehicle onto the device via track 14, aligning each wheel to ensure it is precisely positioned above and centered on the transverse load platform 19. Monitors are then installed on key parts of the vehicle's suspension to collect data in real time during the chassis test (this detection technology is existing and mature, and is common knowledge in the field, so it will not be elaborated further). The vertical actuator assembly 16 within the actuator receiving slots 13 at the four corners of the chassis testing device 11 is activated. The vertical actuator assembly 16 drives the vertical load platform 17 connected to its upper end to move vertically upwards or downwards, thereby causing the vehicle testing components above to move vertically in sync. If the transverse actuator is activated... Device 18 will drive the transverse load platform 19 to move horizontally left and right. At the same time, the movement amplitude and movement frequency of the vehicle test components under the four wheels can be set according to the test requirements. After the test is started, the data fed back by the monitor in real time is checked to complete the performance test of the car chassis under different vertical and transverse working conditions. During the process of the vertical actuator group 16 driving the vehicle test components to rise or fall, the floating mounting frame 21 in the follower structure will move up and down synchronously along the axis of the sliding column group 22. At this time, the first slide rail 24 at the lower end of the floating mounting frame 21 will slide synchronously along the outer wall of the sliding column group 22 under the limiting and guiding action of the sliding column group 22, ensuring the stability and accuracy of the movement of the floating mounting frame 21 and avoiding displacement deviation.

[0051] In the second step, when the lateral actuator 18 moves the lateral load platform 19 to one or both sides, the side wall of the lateral load platform 19 will squeeze the transmission plate 26 on one side. After being subjected to force, the transmission plate 26 moves towards the first hydraulic cylinder 25, thereby squeezing the hydraulic oil inside the first hydraulic cylinder 25, causing the hydraulic oil inside the first hydraulic cylinder 25 to generate pressure. The squeezed hydraulic oil is transported to the inlet of the first hydraulic balancer 27 through the first oil pipe 32. After receiving the hydraulic oil, the first hydraulic balancer 27 divides it evenly into two paths for transmission. One path of hydraulic oil is transported to the inlet of the second hydraulic cylinder 29 through the second oil pipe 33. The pressure of the hydraulic oil pushes the piston rod of the second hydraulic cylinder 29 to extend outward. The lever moves the baffle 31 closer to one side of the wheel. The extension distance of the baffle 31 is adjusted according to the movement of the lateral load table 19 to achieve lateral adaptive limiting of the wheel. Another hydraulic oil is delivered to the inlet of the third hydraulic cylinder 42 through the third oil pipe 43. The pressure of the hydraulic oil drives the piston rod of the third hydraulic cylinder 42 to pull inward. The piston rod drives the sliding seat 45 to slide along the length of the second slide rail 44. While the sliding seat 45 moves, it drives the triangular connecting rod 46 to move synchronously, so that the triangular connecting rod 46 and the baffle 31 form a triangular support structure, which enhances the structural stability of the baffle 31 during the limiting process, prevents the baffle 31 from deforming or shifting due to excessive force, and ensures reliable lateral limiting effect of the wheel.

[0052] Thirdly, when the vertical actuator assembly 16 drives the vehicle test component to rise or fall, the floating mounting bracket 21 in the follower structure will move vertically in sync, thereby driving the first hydraulic cylinder 25, the first hydraulic balancer 27, the adaptive multi-directional support structure, and the triangular support hydraulic structure fixed on the floating mounting bracket 21 to move synchronously as a whole. When the first hydraulic cylinder 25 rises, it will drive the sliding sleeve 39 fixed at its upper end to move upward synchronously. In the initial state, the limiting slide plate 36 is located at the top position inside the limiting slide groove 41. If the rising range of the sliding sleeve 39 is less than the depth of the limiting slide groove 41, the sliding sleeve 39 will not contact the inner wall of the limiting slide groove 41 during the upward movement, and the limiting slide groove 41 cannot support the limiting slide plate 36. At this time, the piston assembly 35 remains in the initial position inside the cylinder 34 and does not slide, and there is no flow of gas inside the cylinder 34. The square airbag 37 maintains its initial state. If the rising amplitude of the sliding sleeve 39 is greater than the depth of the limiting groove 41, the sliding sleeve 39 moves upward until it contacts the bottom inner wall of the limiting groove 41. The continuing to rise sliding sleeve 39 will support the limiting slide plate 36 to move upward through the bottom inner wall of the limiting groove 41. The limiting slide plate 36 drives the piston assembly 35 to slide upward inside the cylinder 34. The space inside the cylinder 34 is compressed, and the gas generates pressure and is delivered to the air inlet of the square airbag 37 through the first air pipe 38. After the gas enters the square airbag 37, it expands. The expanded square airbag 37 fits towards the wheel, forming a flexible vertical auxiliary limit on the wheel, avoiding hard contact that could damage the wheel tire or rim. At the same time, the expansion degree of the square airbag 37 is adjusted according to the movement amplitude of the vertical actuator assembly 16 to achieve adaptive limit in the vertical direction.

[0053] In the fourth step, after the chassis undergoes multiple tests of different amplitudes and directions, the wheels are prone to shifting off the lateral load platform 19, deviating from its central reference position. The lateral movement of the lateral load platform 19 drives the baffle 31 towards the wheel side and creates a limit, while the vertical movement of the vertical load platform 17 causes the square airbag 37 to inflate and deploy. Subsequently, when the baffle 31 and the square airbag 37 of the adaptive multi-sided support structure move towards the offset wheel side, the square airbag 37 first flexibly contacts the offset wheel. Simultaneously, the vibration force generated by the vertical load platform 17 and the lateral load platform 19 driving the chassis during the test serves as an auxiliary force. The combined force of the rigid thrust of the baffle 31 moving towards the tire and the flexible pushing force of the square airbag 37 work together to push the off-center wheel toward the center reference point of the lateral load platform 19, completing the wheel reset and correction. During the wheel reset process by the baffle 31 and the square airbag 37, if the thrust or the internal pressure of the airbag is too large, exceeding the preset load threshold of the second hydraulic cylinder 29 and the square airbag 37, the hydraulic oil inside the second hydraulic cylinder 29 will flow out through the side wall pressure relief port and be transported to the inlet of the second hydraulic balancer 48 via the fourth oil pipe 49. The second hydraulic balancer 48 then transports the hydraulic oil to the hydraulic cylinder 5 via the fifth oil pipe 55. 2. At the inlet, hydraulic oil pressure pushes the hydraulic elastic piston assembly 54 inside the hydraulic cylinder 52 to move. When the compressive pressure exceeds the elastic resistance of the hydraulic elastic piston assembly 54, the hydraulic elastic piston assembly 54 displaces to release the pressure space, realizing overload pressure relief of the hydraulic system and preventing pipe rupture or component damage. Simultaneously, when the gas pressure inside the square air bladder 37 is too high, gas will be delivered to the inlet of the air cylinder 51 through the second air pipe 56. The gas pressure pushes the pneumatic elastic piston assembly 53 inside the air cylinder 51 to move. When the compressive pressure exceeds the elastic resistance of the pneumatic elastic piston assembly 53, the pneumatic elastic piston assembly 53 displaces to release the pressure space. The pressure space is released to relieve the overload pressure of the pneumatic system and prevent excessive air pressure from causing safety hazards. After the wheel is reset, the external force of the wheel on the baffle 31 and the square airbag 37 disappears. The hydraulic elastic piston assembly 54 in the hydraulic cylinder 52 is reset under its own elastic restoring force, pushing the hydraulic oil to flow back in the reverse direction along the fifth oil pipe 55, the second hydraulic balancer 48, and the fourth oil pipe 49, realizing the automatic return of the hydraulic oil. The pneumatic elastic piston assembly 53 in the air cylinder 51 is reset under its own elastic restoring force, pushing the gas to flow back in the reverse direction along the second air pipe 56, realizing the automatic return of the gas, so that the whole device is restored to the initial working state.

[0054] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A floating support mechanism for testing the chassis of a new energy vehicle, comprising a chassis testing device (11), wherein actuator receiving slots (13) are provided at the four corners of the chassis testing device (11), and side mounting cavities (12) are provided on both sides of each actuator receiving slot (13). Tracks (14) are symmetrically fixedly installed on the upper end of the chassis testing device (11). A vertical actuator assembly (16) is configured inside each actuator receiving slot (13). A vertical load table (17) is assembled on the upper end of the vertical actuator assembly (16). A lateral actuator (18) is connected to the inner side of the vertical load table (17). A lateral load table (19) is assembled on the upper end of the lateral actuator (18). The mechanism is characterized in that: The vertical actuator assembly (16) is provided with a follower structure on its inner side. The follower structure is provided with an adaptive multi-directional support structure. The adaptive multi-directional support structure is provided with a triangular support hydraulic structure. The follower structure and the chassis testing device (11) are provided with an explosion-proof structure. Each side mounting cavity (12) is fixedly installed with a protective cover (15) at its upper end. The follower structure includes a floating mounting frame (21), and a sliding column assembly (22) is fixedly installed inside each of the side mounting cavities (12). A first connecting seat (23) is symmetrically fixedly installed at the upper end of each of the floating mounting frames (21), and a first slide rail (24) is symmetrically fixedly installed at the lower end of each of the first connecting seats (23). A first hydraulic cylinder (25) is fixedly installed at the upper end of the first connecting seat (23), and a transmission plate (26) is fixedly installed on the piston rod of the first hydraulic cylinder (25).

2. The floating support mechanism for testing new energy vehicle chassis as described in claim 1, characterized in that, Each of the floating mounting brackets (21) is fixedly mounted on the outside of the vertical actuator assembly (16) and its two ends extend into the side mounting cavity (12). The sliding column assembly (22) is slidably mounted with the floating mounting bracket (21), the first slide rail (24) is slidably mounted with the sliding column assembly (22), and the transmission plate (26) is parallel to the transverse load table (19).

3. The floating support mechanism for testing new energy vehicle chassis as described in any one of claims 1-2, characterized in that, The adaptive multi-directional support structure includes a first hydraulic balancer (27), each of the first hydraulic balancers (27) is located above the first hydraulic cylinder (25), each of the first hydraulic cylinders (25) has a second connecting seat (28) fixedly installed at the upper end, and each of the second connecting seats (28) has a second hydraulic cylinder (29) symmetrically fixedly installed at the upper end.

4. The floating support mechanism for testing new energy vehicle chassis as described in claim 3, characterized in that, The piston rods of the second hydraulic cylinder (29) are fixedly installed with baffles (31) on both sides. The baffles (31) are located on both sides of the transverse load table (19). A first oil pipe (32) is provided between the inlet of each first hydraulic balancer (27) and the outlet of the first hydraulic cylinder (25).

5. The floating support mechanism for testing new energy vehicle chassis as described in claim 4, characterized in that, A second oil pipe (33) is provided between the outlet of each of the first hydraulic balancers (27) and the inlet of the second hydraulic cylinder (29). A cylinder (34) is fixedly installed inside each of the side mounting cavities (12). A piston assembly (35) is slidably installed inside each of the cylinders (34). A limit slide plate (36) is fixedly installed at the end of each piston assembly (35). A square airbag (37) is provided on the side wall of each baffle (31).

6. The floating support mechanism for testing new energy vehicle chassis as described in claim 5, characterized in that, Each of the square airbags (37) has a first air pipe (38) between its air inlet and the air outlet of the cylinder (34). Each of the first hydraulic cylinders (25) has a sliding sleeve (39) fixedly installed at its lower end. Each of the sliding sleeves (39) has a limiting groove (41) inside. Each of the limiting grooves (41) is slidably installed with a limiting slide plate (36).

7. The floating support mechanism for testing new energy vehicle chassis as described in claim 4, characterized in that, The triangular support hydraulic structure includes a third hydraulic cylinder (42), each of which is fixedly mounted above the second connecting seat (28). The piston rod of the third hydraulic cylinder (42) faces the opposite direction to the piston rod of the second hydraulic cylinder (29). A third oil pipe (43) is provided between the inlet of each third hydraulic cylinder (42) and the outlet of the first hydraulic balancer (27).

8. The floating support mechanism for testing new energy vehicle chassis as described in claim 7, characterized in that, Each of the second connecting seats (28) is symmetrically fixedly mounted with a second slide rail (44) at its upper end. A slide seat (45) is slidably mounted between each group of second slide rails (44). Each slide seat (45) is fixedly mounted between the piston rod of the third hydraulic cylinder (42). A triangular connecting rod (46) is symmetrically fixedly mounted between each baffle (31) and the slide seat (45).

9. The floating support mechanism for testing new energy vehicle chassis as described in claim 6, characterized in that, The explosion-proof structure includes an outer frame (47), each of the outer frames (47) is installed on the upper end of the first connecting seat (23), and a second hydraulic balancer (48) is fixedly installed on the upper end of each of the outer frames (47). A fourth oil pipe (49) is provided between the inlet of each second hydraulic balancer (48) and the pressure relief port of the second hydraulic cylinder (29).

10. The floating support mechanism for testing new energy vehicle chassis as described in claim 9, characterized in that, Each of the side mounting cavities (12) is fixedly mounted with an air cylinder (51) and a hydraulic cylinder (52) at its upper end. The air cylinder (51) is provided with a pneumatic elastic piston assembly (53), and the hydraulic cylinder (52) is provided with a hydraulic elastic piston assembly (54). A fifth oil pipe (55) is provided between the outlet of the second hydraulic balancer (48) and the inlet of the hydraulic cylinder (52). A second air pipe (56) is provided between the first air pipe (38) and the air inlet of the air cylinder (51).

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