Parallel shaft type whole vehicle longitudinal and transverse load simulation platform

Abstract

The utility model discloses a parallel shaft type whole vehicle longitudinal and transverse load simulation platform, which comprises an integral frame, the integral frame comprises a concrete foundation pit, a lateral moving platform is arranged in the concrete foundation pit, and a revolving platform is arranged on the surface of the lateral moving platform. The upper part of the rotation platform is provided with a lifting fixing assembly, and the upper part of the lifting fixing assembly is provided with a tested vehicle. In the testing process, tires of a tested vehicle need to be detached, a vehicle body is supported by the vehicle lifting and fixing assembly and fixed to the parallel shaft load simulation assembly through the vehicle connecting flange, then various dynamic tests can be carried out, and the parallel shaft load simulation assembly reduces errors and improves testing precision in a mechanical transmission mode. Compared with a traditional rotary drum type VTEHIL rack, the parallel shaft load simulation assembly is adopted, so that the test precision is improved, and vehicle dynamics simulation under various working conditions is optimized.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle longitudinal and transverse load simulation platform, and more specifically to a parallel axis vehicle longitudinal and transverse load simulation platform. Background Technology

[0002] Currently, vehicle performance testing equipment on the market mainly focuses on longitudinal performance testing, while lateral performance testing typically relies on real-vehicle testing at proving grounds. For comprehensive performance evaluation of autonomous vehicles, six-degree-of-freedom driving simulators are currently the primary method. However, traditional longitudinal performance test benches (such as chassis dynamometers) can only test longitudinal dynamic characteristics, and while six-degree-of-freedom driving simulators can simulate lateral performance, they still have limitations in practical applications and cannot accurately reproduce real-world driving environments.

[0003] Existing laboratory testing equipment, such as the "Comprehensive Performance Testing System for Unmanned Vehicles" (patent number: 201710252539.X, abbreviated as VTEHIL bench), can simultaneously test the longitudinal and lateral performance of unmanned vehicles. However, this system still uses a traditional drum structure for speed and load simulation, relying on the friction generated by the contact between the tire and the drum to transfer the load. Due to the significant differences between the physical characteristics of the drum surface and actual roads, there is a large deviation between the test data and real-world road tests. According to industry test reports and actual measurement data analysis, the power error of the traditional drum testing method is between 10-20%, the fuel consumption error is between 15-30%, and the acceleration time error can reach 5-15%.

[0004] The existing VTEHIL test bench needs to simulate complex traffic conditions with high accuracy, especially requiring acceleration time errors to be controlled within 5%. Traditional drum-type test benches cannot meet these testing requirements. Therefore, a new technical solution is needed to address this issue. Utility Model Content

[0005] The purpose of this invention is to provide a parallel-axis vehicle longitudinal and transverse load simulation platform, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a parallel-axis vehicle longitudinal and transverse load simulation platform, comprising: an integral frame, the integral frame including a concrete foundation pit, a lateral shifting platform disposed inside the concrete foundation pit and a rotary platform disposed on the surface of the lateral shifting platform, a lifting and fixing assembly disposed on the upper part of the rotary platform and a vehicle under test disposed on the upper part of the lifting and fixing assembly, a parallel-axis load simulation assembly disposed at the wheel of the vehicle under test, the parallel-axis load simulation assembly including a double-layer slide, a rotary table disposed on the upper part of the double-layer slide, a fixed seat disposed on the upper part of the rotary table and a driver disposed on the side of the fixed seat, a first gear disposed at the power output end of the driver and a second bearing disposed at the connection between the first gear and the fixed seat, a first bearing disposed on the upper part of the fixed seat and a second gear disposed on the side of the first bearing, a synchronous belt disposed between the first gear and the second gear, and a vehicle connection flange disposed on the side of the second gear.

[0007] In a preferred embodiment of the present invention, the double-layer slide table includes a base plate and a first guide rail is provided on the upper part of the base plate. A first connecting slider is provided on the surface of the first guide rail and a first slide table is provided on the upper part of the first connecting slider. A connecting block is provided on the side of the first slide table and a screw is provided inside the connecting block. A first motor is provided on the upper part of the base plate and the screw is connected to the power output end of the first motor.

[0008] In a preferred embodiment of the present invention, a second guide rail is provided on the upper part of the first slide table and a second connecting slider is provided on the surface of the second guide rail. A second slide table is provided on the upper part of the second connecting slider. A second motor is provided on the surface of the first slide table. A screw is provided at the power output end of the second motor and the screw is threadedly connected to a fixing block on the side of the second slide table.

[0009] In a preferred embodiment of this utility model, a gear plate is provided at the connection between the second slide and the rotary table, and a fixing plate is provided on the side of the rotary table. A drive motor is provided on the surface of the fixing plate, and a drive gear is provided at the power output end of the drive motor, and the drive gear meshes with the gear plate.

[0010] In a preferred embodiment of this utility model, the first guide rail and the second guide rail are each provided in two sets and arranged in parallel with each other.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] The overall framework of this utility model includes a concrete foundation pit. A lateral shifting platform is installed inside the concrete foundation pit, and a rotary platform is installed on the surface of the lateral shifting platform. A lifting and fixing assembly is installed on the upper part of the rotary platform, and a vehicle under test is installed on the upper part of the lifting and fixing assembly. A parallel shaft load simulation assembly is installed at the wheels of the vehicle under test. The parallel shaft load simulation assembly includes a double-layer slide, with a rotary platform installed on the upper part of the double-layer slide. A fixed seat is installed on the upper part of the rotary platform, and a driver is installed on the side of the fixed seat. A first gear is installed at the power output end of the driver, and a second bearing is installed at the connection between the first gear and the fixed seat. A second gear is installed on the side of the first bearing on the upper part of the fixed seat. A synchronous belt is installed between the first gear and the second gear. A vehicle connection flange is installed on the side of the second gear. The double-layer slide provides lateral and longitudinal movement control to adapt to different wheelbases and track widths, and decouples the wheelbase and track width when the vehicle is turning. The change in distance improves the accuracy of the test; the rotary table can rotate around the rotation center, synchronized with the vehicle's steering movement, to accurately reproduce the vehicle's dynamic response. The drive, through the first gear and synchronous belt transmission, drives the second gear and the vehicle connection flange to rotate, realizing load simulation and ensuring the stability of power transmission; the vehicle connection flange is used to fix the vehicle under test, working in conjunction with the vehicle lifting and fixing assembly to provide a high-precision test environment. During the test, the tires of the vehicle under test need to be removed, the body is supported by the vehicle lifting and fixing assembly, and fixed to the parallel shaft load simulation assembly through the vehicle connection flange. Subsequently, various dynamic tests can be performed. The parallel shaft load simulation assembly reduces errors and improves test accuracy through mechanical transmission, and more accurately simulates actual driving conditions. Compared with the traditional drum-type VTEHIL test bench, the parallel shaft load simulation assembly improves test accuracy and optimizes vehicle dynamics simulation under various working conditions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the parallel shaft load simulation assembly of this utility model.

[0015] In the diagram: 1. Concrete foundation pit; 2. Lateral displacement platform; 3. Rotary platform; 4. Lifting and fixing assembly; 5. Vehicle under test; 6. Parallel shaft load simulation assembly; 7. Base plate; 8. First guide rail; 9. First connecting slider; 10. Screw; 11. Connecting block; 12. First motor; 13. First slide table; 14. Second guide rail; 15. Second slide table; 16. Rotary table; 17. Gear plate; 18. Fixing plate; 19. Drive motor; 20. Drive gear; 21. Fixing seat; 22. Driver; 23. First bearing; 24. Second bearing; 25. First gear; 26. Second gear; 27. Vehicle connecting flange; 28. Second motor; 29. ​​Synchronous belt. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-2 This utility model provides a technical solution: a parallel-axis vehicle longitudinal and transverse load simulation platform.

[0018] To address the aforementioned issues: the existing VTEHIL test bench requires highly accurate simulation of complex traffic conditions, particularly demanding acceleration time errors controlled within 5%, a requirement that traditional rotary drum test benches cannot meet.

[0019] The solution is as follows: A parallel-axis vehicle longitudinal and transverse load simulation platform includes: an integral frame, the integral frame including a concrete pit 1, a lateral shifting platform 2 disposed inside the concrete pit 1, and a rotating platform 3 disposed on the surface of the lateral shifting platform 2, a lifting and fixing assembly 4 disposed on the upper part of the rotating platform 3, and a vehicle under test 5 disposed on the upper part of the lifting and fixing assembly 4, a parallel-axis load simulation assembly 6 disposed at the wheel of the vehicle under test 5, the parallel-axis load simulation assembly 6 including a double-layer slide, and a return mechanism disposed on the upper part of the double-layer slide. A turntable 16 has a fixed base 21 on its upper part and a driver 22 on its side. A first gear 25 is provided at the power output end of the driver 22, and a second bearing 24 is provided at the connection between the first gear 25 and the fixed base 21. A first bearing 23 is provided on the upper part of the fixed base 21, and a second gear 26 is provided on the side of the first bearing 23. A synchronous belt 29 is provided between the first gear 25 and the second gear 26. A vehicle connection flange 27 is provided on the side of the second gear 26. The double-layer slide lift... The system provides lateral and longitudinal movement control to adapt to different wheelbases and track widths, and decouples changes in wheelbase and track width during vehicle steering, improving test accuracy. The rotary table 16 can rotate around the rotation center, synchronizing with the vehicle's steering motion to accurately reproduce the vehicle's dynamic response. The drive 22 drives the second gear 26 and vehicle connection flange 27 to rotate via the first gear 25 and synchronous belt 29, achieving load simulation and ensuring stable power transmission. The vehicle connection flange 27 is used to fix the vehicle under test 5 and works in conjunction with the vehicle lifting and fixing assembly 4 to provide a high-precision test environment. During the test, the tires of the vehicle under test 5 need to be removed, the body is supported by the vehicle lifting and fixing assembly 4, and fixed to the parallel shaft load simulation assembly via the vehicle connection flange 27. Subsequently, various dynamic tests can be performed. The parallel shaft load simulation assembly 6 reduces errors and improves test accuracy through mechanical transmission, and more accurately simulates actual driving conditions. Compared with the traditional drum-type VTEHIL test bench, the parallel shaft load simulation assembly is used to improve test accuracy and optimize vehicle dynamics simulation under various working conditions.

[0020] Further improvements, such as Figure 2 As shown: The double-layer slide table includes a base plate 7 and a first guide rail 8 is provided on the upper part of the base plate 7. A first connecting slider 9 is provided on the surface of the first guide rail 8 and a first slide table 13 is provided on the upper part of the first connecting slider 9. A connecting block 11 is provided on the side of the first slide table 13 and a screw 10 is provided inside the connecting block 11. A first motor 12 is provided on the upper part of the base plate 7 and the screw 10 is connected to the power output end of the first motor 12. This configuration realizes the lateral and longitudinal movement control of the slide table, which can adapt to the changes in wheelbase and track width of different vehicles. Especially when the vehicle is turning, it can decouple the changes in wheelbase and track width, thereby significantly improving the accuracy of the test.

[0021] Further improvements, such as Figure 2 As shown: A second guide rail 14 is provided on the upper part of the first slide table 13, and a second connecting slider is provided on the surface of the second guide rail 14. A second slide table 15 is provided on the upper part of the second connecting slider. A second motor 28 is provided on the surface of the first slide table 13. A screw 10 is provided at the power output end of the second motor 28, and the screw 10 is threadedly connected to the fixing block on the side of the second slide table 15. This configuration realizes the lateral and longitudinal movement control of the slide table. By adding the second slide table 15, the flexibility and accuracy of the slide table system are further enhanced, enabling the platform to more accurately simulate the movement state of the vehicle under different working conditions.

[0022] Further improvements, such as Figure 2 As shown: A gear plate 17 is provided at the connection between the second slide 15 and the rotary table 16, and a fixing plate 18 is provided on the side of the rotary table 16. A drive motor 19 is provided on the surface of the fixing plate 18, and a drive gear 20 is provided at the power output end of the drive motor 19. The drive gear 20 meshes with the gear plate 17, so that the rotary table 16 can rotate around the rotation center and coordinate with the steering movement of the vehicle, thereby accurately reproducing the dynamic response of the vehicle and improving the authenticity and accuracy of the test.

[0023] Further improvements, such as Figure 2 As shown: The first guide rail 8 and the second guide rail 14 are each provided with two sets and arranged in parallel to each other. The parallel arrangement of the guide rails enhances the stability and load-bearing capacity of the slide system, enabling the platform to maintain high-precision motion control even when subjected to large loads.

[0024] Working principle: The overall frame includes a concrete foundation pit 1. Inside the concrete foundation pit 1, a lateral shifting platform 2 is set, and a rotary platform 3 is set on the surface of the lateral shifting platform 2. A lifting and fixing assembly 4 is set on the upper part of the rotary platform 3, and a test vehicle 5 is set on the upper part of the lifting and fixing assembly 4. A parallel shaft load simulation assembly 6 is set at the wheels of the test vehicle 5. The parallel shaft load simulation assembly 6 includes a double-layer slide, and a rotary platform 16 is set on the upper part of the double-layer slide. A fixed seat 21 is set on the upper part of the rotary platform 16. A driver 22 is provided on the side of the fixed base 21. A first gear 25 is provided at the power output end of the driver 22, and a second bearing 24 is provided at the connection between the first gear 25 and the fixed base 21. A first bearing 23 is provided on the upper part of the fixed base 21, and a second gear 26 is provided on the side of the first bearing 23. A synchronous belt 29 is provided between the first gear 25 and the second gear 26. A vehicle connection flange 27 is provided on the side of the second gear 26. The double-layer slide provides lateral and longitudinal movement control to adapt to different wheelbases and track widths. The system decouples the changes in track width and wheelbase during vehicle steering, improving test accuracy. The rotary table 16 can rotate around the rotation center, synchronizing with the vehicle's steering motion to accurately reproduce the vehicle's dynamic response. The drive 22 drives the second gear 26 and vehicle connection flange 27 to rotate via the first gear 25 and synchronous belt 29, achieving load simulation and ensuring stable power transmission. The vehicle connection flange 27 is used to fix the vehicle under test 5 and works in conjunction with the vehicle lifting and fixing assembly 4 to provide a high-precision test environment. During the test, the tires of the vehicle under test 5 need to be removed, and the body is supported by the vehicle lifting and fixing assembly 4 and fixed to the parallel shaft load simulation assembly via the vehicle connection flange 27. Subsequently, various dynamic tests can be performed. The parallel shaft load simulation assembly 6 reduces errors and improves test accuracy through mechanical transmission, and more accurately simulates actual driving conditions. Compared with the traditional drum-type VTEHIL test bench, the parallel shaft load simulation assembly is used to improve test accuracy and optimize vehicle dynamics simulation under various working conditions.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc., are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A parallel-axle type whole vehicle longitudinal-lateral load simulation platform, characterized by comprising: The utility model relates to a whole frame including concrete foundation pit (1), the inside of concrete foundation pit (1) is provided with side shift platform (2) and the surface of side shift platform (2) is provided with rotary platform (3), the upper portion of rotary platform (3) is provided with lifting fixed assembly (4) and the upper portion of lifting fixed assembly (4) is provided with measured vehicle (5), the wheel of measured vehicle (5) is provided with parallel axis load simulation assembly (6), parallel axis load simulation assembly (6) includes double -deck sliding table, the upper portion of double -deck sliding table is provided with rotary table (16), the upper portion of rotary table (16) is provided with fixed seat (21) and the side of fixed seat (21) is provided with driver (22), the power output end of driver (22) is provided with first gear (25) and is provided with second bearing (24) between first gear (25) and the junction of fixed seat (21), the upper portion of fixed seat (21) is provided with first bearing (23) and the side of first bearing (23) is provided with second gear (26), is provided with synchronous belt (29) between first gear (25) and second gear (26), the side of second gear (26) is provided with vehicle connection flange (27). The double -deck sliding table includes bottom plate (7) and the upper portion of bottom plate (7) is provided with first guide rail (8), the surface of first guide rail (8) is provided with first connecting sliding block (9) and the upper portion of first connecting sliding block (9) is provided with first sliding table (13), the side of first sliding table (13) is provided with connecting block (11) and the inside of connecting block (11) is provided with screw rod (10), the upper portion of bottom plate (7) is provided with first motor (12) and screw rod (10) is connected with the power output end of first motor (12).

2. The parallel axis type whole vehicle longitudinal and lateral load simulation platform according to claim 1, characterized in that: The upper portion of first sliding table (13) is provided with second guide rail (14) and the surface of second guide rail (14) is provided with second connecting sliding block, the upper portion of second connecting sliding block is provided with second sliding table (15), the surface of first sliding table (13) is provided with second motor (28), the power output end of second motor (28) is provided with screw rod (10) and screw rod (10) is screw -threaded with the fixed block of second sliding table (15) side.

3. The parallel axis type whole vehicle longitudinal and lateral load simulation platform according to claim 2, characterized in that: The connecting place of second sliding table (15) and rotary table (16) is provided with gear disc (17) and the side of rotary table (16) is provided with fixed plate (18), the surface of fixed plate (18) is provided with drive motor (19), the power output end of drive motor (19) is provided with drive gear (20) and drive gear (20) and gear disc (17) are engaged with each other.

4. The parallel axis type whole vehicle longitudinal and lateral load simulation platform according to claim 3, characterized in that: First guide rail (8) and second guide rail (14) are provided with two groups and are provided with parallel.

5. The parallel axis type whole vehicle longitudinal and lateral load simulation platform according to claim 2, characterized in that: ​

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