EPS in-loop simulation test system and test bench thereof

Abstract

The invention relates to the technical field of EPS in-the-loop simulation testing, in particular to an EPS in-the-loop simulation testing system and a testing rack thereof, and solves the problems that when an EPS in-the-loop simulation testing rack is used, the EPS in-the-loop simulation testing rack cannot be adapted to automobiles of different models for use, heavy devices need to be manually carried to adapt to the positions of automobile wheels, inconvenience is caused, and the testing rack is inconvenient to use. The test bench comprises an automobile body, the front side and the rear side of the bottom end of the automobile body are each movably provided with a bottom plate, the top end of each bottom plate is movably provided with two movable bases, each movable base is provided with a movable base, and each movable base is provided with a movable base. Load motors are mounted at the top ends of the movable bases through bolts. According to the invention, the steering tie rod is inserted into the connecting groove, so that the two ends of the steering tie rod and the connecting block are quickly matched and installed, the time required by personnel for installation is shortened, the time required by testing is shortened, and the testing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of EPS in-the-loop simulation test, in particular to an EPS in-the-loop simulation test system and a test bench thereof. Background Art

[0002] With the continuous development of science and technology, cars have become indispensable in people's lives, from being a luxury item in the beginning to being a standard for travel today. Although cars are popular, there is still a lot of room for sustainable development.

[0003] EPS, or the automobile steering system, is an essential and important mechanism for automobiles and is a mechanism that ensures the safety of vehicle driving. Before the car is officially on the road, the steering system must have standard and qualified stability, so it needs to be subjected to in-the-loop simulation testing. In-the-loop simulation testing is a powerful testing method that can be used to more effectively test embedded control systems.

[0004] The existing EPS-in-the-loop simulation test bench is often unable to adapt to different models of cars when in use. It is very inconvenient to manually carry heavy devices to adapt to the position of the car wheels. In addition, when the test bench is conducting continuous tests on multiple vehicles, the installation of the steering tie rod is rather cumbersome and the manual installation efficiency is low, resulting in reduced test efficiency. Therefore, it does not meet the existing needs. In this regard, we propose an EPS-in-the-loop simulation test system and its test bench. Summary of the invention

[0005] The object of the present invention is to provide an EPS-in-the-loop simulation test system and a test bench thereof, so as to solve the problem that the EPS-in-the-loop simulation test bench proposed in the above-mentioned background technology is often unable to be adapted to different models of cars for use, and requires manual transportation of heavy devices to adapt to the position of car wheels, which is very inconvenient; and when the test bench is used for continuous testing of multiple vehicles, the installation of the steering tie rod is relatively cumbersome, and the manual installation efficiency is low, resulting in reduced testing efficiency and other problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an EPS in-loop simulation test bench, comprising a car body, wherein base plates are movably installed on both the front and rear sides of the bottom end of the car body, two movable bases are movably installed on the top of the base plates, load motors are installed on the top of the movable bases by bolts, a length adjustment module is provided between the two base plates, a width adjustment module is provided on the top of the base plates, and a steering test module is provided on the top of the car body located on the front side near the rear side.

[0007] Preferably, the steering test module includes a steering tie rod, a connecting rod, a connecting block, a connecting groove, a spring groove, a compression spring, a limit buckle and an inclined surface. A steering tie rod is provided on the front side of the bottom end of the automobile body. Both ends of the steering tie rod are movably connected with connecting blocks, and the surfaces of the connecting blocks are provided with connecting grooves. Both ends of the steering tie rod are movably inserted into the interior of the connecting groove, and the interior of the connecting groove is provided with a spring groove. The interior of the spring groove is slidably installed with a limit buckle, and a compression spring is movably installed between the limit buckle and the interior of the spring groove. The limit buckles are movably inserted into the interior of both ends of the steering tie rod, and one side surface of the limit buckle is provided with an inclined surface.

[0008] Preferably, the steering test module also includes a stepper motor, a cross shaft and a cross matching groove. Stepper motors are fixedly installed on both sides of the connecting block. The output ends of the stepper motors are connected to cross shafts through couplings. The cross shafts are movably inserted into the interior of the spring groove and extend to the interior of the limit buckle. A cross matching groove is provided on one side of the limit buckle close to the cross shaft, and the cross shafts are movably inserted into the interior of the cross matching groove.

[0009] Preferably, the steering test module also includes a pushing groove, a matching slider, a movable rod, an inner groove of the movable rod, an extrusion spring, a rotating rod and a fixed rod. The rear sides of the two movable bases located on the front side are each provided with a pushing groove. The outer end position of the connecting rod is movably installed with a movable rod, the interior of the movable rod is provided with an inner groove of the movable rod, the outer end of the connecting rod is movably inserted into the interior of the inner groove of the movable rod, an extrusion spring is movably installed between the connecting rod and the interior of the inner groove of the movable rod, the outer end of the movable rod is fixedly installed with a rotating rod, the outer surface of the rotating rod is rotatably connected to a fixed rod, one end of the fixed rod is fixedly installed with a matching slider, and the matching slider is slidably inserted into the interior of the pushing groove.

[0010] Preferably, the length adjustment module includes a telescopic outer rod, a telescopic inner rod and a telescopic slot, three telescopic outer rods are fixedly installed on the front surface of the base plate located on the rear side, three telescopic inner rods are fixedly installed on the rear surface of the base plate located on the front side, telescopic slots are provided inside the telescopic outer rods, and the telescopic inner rods are slidably inserted into the inside of the telescopic slots.

[0011] Preferably, the width adjustment module includes a movable base, a movable guide rail and a sliding block, the top of the bottom plate is provided with three movable guide rails, the bottom of the movable base is fixedly mounted with three sliding blocks, and the sliding blocks are slidably inserted into the interior of the movable guide rails.

[0012] Preferably, a servo motor is provided inside the movable base, the output end of the servo motor is connected to a driving gear with a coupling, the outer side of the driving gear is meshedly connected to a driven rack, and one end of the driven rack is fixedly connected to a matching slider.

[0013] An EPS in-loop simulation test system, characterized in that: the EPS in-loop simulation test bench is equipped with an EPS in-loop simulation test system, and the EPS in-loop simulation test system includes a load motor, an axle, an EPS power unit, a torque sensor, a signal transfer box, a PXI controller, a LAN transfer box, a signal generator, an IPC and a programmable power supply; The EPS power unit includes an EPS motor, an electric steering module, a steering tie rod and a steering wheel. The EPS motor is electrically connected to the electric steering module, the electric steering module is installed on the surface of the steering tie rod, the electric steering module is electrically connected to the steering wheel, and the electric steering module is connected to a signal adapter box via CAN communication.

[0014] Preferably, the signal transfer box is connected to four load motors via CAN communication, torque sensors are provided at the output ends of the load motors, and the torque sensors are connected to signal lines of the signal transfer box.

[0015] Preferably, the signal transfer box is connected to the PXI controller via CAN communication, and the PXI controller controls the signal transfer box via IO, the PXI controller is connected to the programmable power supply via LAN, the programmable power supply is connected to the signal transfer box via a power supply line, the signal transfer box is connected to the signal generator via a signal line, the signal generator is connected to the LAN transfer box via LAN, the LAN transfer box is connected to the PXI controller via LAN, and the LAN transfer box is connected to the IPC via LAN.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses a steering test module to enable the device to be used in a manner that the two ends of the steering tie rod can be inserted into the interior of the connecting groove to achieve rapid matching and installation between the connecting block, so that when the device needs to test multiple automobile bodies continuously, each steering tie rod needs to be manually connected by bolts or the like during installation, which is time-consuming and labor-intensive, and the installation time is long, and each test requires a long time. By inserting the steering tie rod into the interior of the connecting groove, the steering tie rod will hit the inclined surface of the limit buckle surface, so that the limit buckle will retract into the interior of the spring groove, and then the limit buckle will be ejected by the elastic potential energy of the compression spring and inserted into the interior of the two ends of the steering tie rod, thereby fixing and limiting the steering tie rod, reducing the time required for installation by personnel, reducing the time required for testing, and thus improving the test efficiency; 2. The present invention cooperates with the length adjustment module and the width adjustment module so that when the device is in use, the position of the telescopic inner rod inside the telescopic groove can be adjusted to adjust the distance between the two bottom plates, so that the device can be adapted to automobile bodies of different lengths for testing, and the distance between the two sides of the mobile base can be adjusted by sliding the mobile base on the surface of the mobile guide rail, so that the device can be adapted to automobile bodies of different widths for testing, which is convenient for use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A cross-sectional front view of the present invention as a whole; Figure 3 A cross-sectional top view of the present invention as a whole; Figure 4 A sectional side view showing the position of the push groove of the present invention; Figure 5 It is a cross-sectional side view of the telescopic slot position of the present invention; Figure 6 For the present invention Figure 3 Schematic diagram of the local structure of part A; Figure 7 For the present invention Figure 4 Schematic diagram of the local structure of part B; Figure 8 It is a schematic diagram of the EPS in-the-loop simulation test system of the present invention.

[0018] In the figure: 1. car body; 2. bottom plate; 3. mobile base; 4. load motor; 5. axle; 6. telescopic outer rod; 7. telescopic inner rod; 8. mobile guide rail; 9. sliding block; 10. steering tie rod; 11. telescopic slot; 12. connecting rod; 13. connecting block; 14. connecting slot; 15. spring groove; 16. stepping motor; 17. cross shaft; 18. compression spring; 19. limit buckle; 20. inclined plane; 21. cross matching slot; 22. pushing slot; 23. matching slider; 24. movable rod; 25. inner slot of movable rod; 26. extrusion spring; 27. rotating rod; 28. fixed rod. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figures 1 to 8An embodiment of the present invention is as follows: an EPS in-loop simulation test bench, comprising a car body 1, bottom plates 2 are movably mounted on both the front and rear sides of the bottom end of the car body 1, two movable bases 3 are movably mounted on the top of the bottom plates 2, load motors 4 are mounted on the top of the movable bases 3 by bolts, a length adjustment module is arranged between the two bottom plates 2, a width adjustment module is arranged on the top of the bottom plates 2, and a steering test module is arranged on the top of the car body 1 located on the front side near the rear side.

[0021] The steering test module includes a steering tie rod 10, a connecting rod 12, a connecting block 13, a connecting groove 14, a spring groove 15, a compression spring 18, a limit buckle 19 and an inclined surface 20. A steering tie rod 10 is provided on the front side of the bottom end of the automobile body 1. Both ends of the steering tie rod 10 are movably connected with connecting blocks 13. The surfaces of the connecting blocks 13 are provided with connecting grooves 14. Both ends of the steering tie rod 10 are movably inserted into the interior of the connecting groove 14. The interior of the connecting groove 14 is provided with spring grooves 15. The interior of the spring groove 15 is slidably installed with a limit buckle 19. A compression spring 18 is movably installed between the limit buckle 19 and the interior of the spring groove 15. The limit buckle 19 is movably inserted into the interior of both ends of the steering tie rod 10. A side surface of the limit buckle 19 is provided with an inclined surface 20.

[0022] The steering test module also includes a stepper motor 16, a cross shaft 17 and a cross matching groove 21. The stepper motors 16 are fixedly installed on both sides of the connecting block 13. The output ends of the stepper motors 16 are connected to the cross shafts 17 through couplings. The cross shafts 17 are movable through the interior of the spring groove 15 and extend to the interior of the limit buckle 19. The side of the limit buckle 19 close to the cross shaft 17 is provided with a cross matching groove 21, and the cross shafts 17 are movably inserted into the interior of the cross matching groove 21.

[0023] The steering test module also includes a pushing groove 22, a matching slider 23, a movable rod 24, a movable rod inner groove 25, an extrusion spring 26, a rotating rod 27 and a fixed rod 28. The rear sides of the two movable bases 3 located on the front side are each provided with a pushing groove 22. The outer end position of the connecting rod 12 is movably installed with a movable rod 24, and the interior of the movable rod 24 is provided with a movable rod inner groove 25. The outer end of the connecting rod 12 is movably inserted into the interior of the movable rod inner groove 25. An extrusion spring 26 is movably installed between the connecting rod 12 and the interior of the movable rod inner groove 25. The outer end of the movable rod 24 is fixedly installed with a rotating rod 27, and the outer surface of the rotating rod 27 is rotatably connected to the fixed rod 28. One end of the fixed rod 28 is fixedly installed with a matching slider 23, and the matching slider 23 slides into the interior of the pushing groove 22.

[0024] Through the steering test module, when the device is in use, the two ends of the steering tie rod 10 can be quickly matched and installed with the connecting block 13 by inserting the steering tie rod 10 into the connecting groove 14, so that when the device needs to test multiple automobile bodies 1 continuously, each steering tie rod 10 needs to be manually connected using bolts or the like during installation, which is time-consuming and labor-intensive, and the installation time is long, and each test requires a long time. By inserting the steering tie rod 10 into the connecting groove 14, the steering tie rod 10 will hit the inclined surface 20 on the surface of the limit buckle 19, so that the limit buckle 19 will retract into the spring groove 15, and then the limit buckle 19 will be ejected by the elastic potential energy of the compression spring 18 and inserted into the two ends of the steering tie rod 10, thereby fixing and limiting the steering tie rod 10, reducing the time required for personnel installation and the time required for testing, thereby improving the test efficiency.

[0025] The length adjustment module includes a telescopic outer rod 6, a telescopic inner rod 7 and a telescopic slot 11. Three telescopic outer rods 6 are fixedly installed on the front surface of the base plate 2 located on the rear side, and three telescopic inner rods 7 are fixedly installed on the rear surface of the base plate 2 located on the front side. The telescopic outer rods 6 are all provided with telescopic slots 11 inside, and the telescopic inner rods 7 are all slidably inserted into the telescopic slots 11.

[0026] The width adjustment module includes a movable base 3, a movable guide rail 8 and a sliding block 9. Three movable guide rails 8 are provided at the top of the bottom plate 2, and three sliding blocks 9 are fixedly installed at the bottom of the movable base 3. The sliding blocks 9 are slidably inserted into the interior of the movable guide rail 8.

[0027] Through the cooperation of the length adjustment module and the width adjustment module, when the device is in use, the position of the telescopic inner rod 7 inside the telescopic groove 11 can be adjusted to adjust the distance between the two bottom plates 2, so that the device can adapt to automobile bodies 1 of different lengths for testing, and the distance between the moving bases 3 on both sides can be adjusted by sliding the moving base 3 on the surface of the moving guide rail 8, so that the device can adapt to automobile bodies 1 of different widths for testing, which is convenient for use of the device.

[0028] The movable base 3 is provided with a servo motor inside, the output end of the servo motor is connected to a driving gear with a coupling, the outer side of the driving gear is meshed with a driven rack, and one end of the driven rack is fixedly connected to the matching slider 23.

[0029] An EPS in-loop simulation test system, characterized in that: an EPS in-loop simulation test bench is equipped with an EPS in-loop simulation test system, and the EPS in-loop simulation test system includes a load motor 4, an axle 5, an EPS power unit, a torque sensor, a signal transfer box, a PXI controller, a LAN transfer box, a signal generator, an IPC and a programmable power supply; The EPS power unit includes an EPS motor, an electric steering module, a steering tie rod 10 and a steering wheel. The EPS motor is electrically connected to the electric steering module, which is mounted on the surface of the steering tie rod 10. The electric steering module is electrically connected to the steering wheel, and the electric steering module is connected to the signal adapter box via CAN communication.

[0030] The signal transfer box is connected to the four load motors 4 via CAN communication. Torque sensors are provided at the output ends of the load motors 4 , and the torque sensors are connected to the signal lines of the signal transfer box.

[0031] The signal transfer box is connected to the PXI controller through CAN communication, and the PXI controller controls the signal transfer box through IO, the PXI controller is connected to the programmable power supply through LAN, the programmable power supply and the signal transfer box are connected through a power supply line, the signal transfer box and the signal generator are connected through a signal line, the signal generator and the LAN transfer box are connected through LAN, the LAN transfer box and the PXI controller are connected through LAN, and the LAN transfer box and the IPC are connected through LAN.

[0032] When the EPS in-loop simulation test system and its test bench are in use, the two ends of the steering tie rod 10 can be quickly matched and installed with the connecting block 13 by inserting the steering tie rod 10 into the connecting groove 14, so that when the device needs to test multiple automobile bodies 1 continuously, each steering tie rod 10 needs to be manually connected using bolts or the like during installation, which is time-consuming and labor-intensive, and the installation time is long, and each test requires a long time. By inserting the steering tie rod 10 into the connecting groove 14, the steering tie rod 10 will hit the inclined surface 20 on the surface of the limit buckle 19, so that the limit buckle 19 will retract into the spring groove 15, and then the limit buckle 19 will be ejected by the elastic potential energy of the compression spring 18 and inserted into the two ends of the steering tie rod 10, thereby fixing and limiting the steering tie rod 10, reducing the time required for personnel installation and the time required for testing, thereby improving test efficiency. When the steering tie rod 10 and the connecting block 13 need to be removed, the stepper motor 16 can be started to drive the cross shaft 17 to rotate, and then the cross shaft 17 drives the limit buckle 19 to rotate through the cross matching groove 21. At this time, after the limit buckle 19 rotates 180 degrees, the inclined surface 20 rotates to the other side direction position. At this time, the steering tie rod 10 is pulled out, and the surface of the steering tie rod 10 will contact the surface of the inclined surface 20 again, so that the limit buckle 19 retracts to the inside of the spring groove 15, and then the steering tie rod 10 can be easily pulled out from the inside of the connecting block 13, reducing the time required for removing the steering tie rod 10 and improving the testing efficiency of the device. The device can adjust the position of the telescopic inner rod 7 inside the telescopic groove 11 to adjust the distance between the two bottom plates 2, so that the device can adapt to automobile bodies 1 of different lengths for testing. The distance between the moving bases 3 on both sides can be adjusted by sliding the moving base 3 on the surface of the moving guide rail 8, so that the device can adapt to automobile bodies 1 of different widths for testing, which is convenient for use of the device.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An EPS in-the-loop simulation test bench, comprising a vehicle body (1), characterized in that: Bottom plates (2) are movably mounted on both the front and rear sides of the bottom of the automobile body (1); two movable bases (3) are movably mounted on the top of the bottom plates (2); load motors (4) are mounted on the top of the movable bases (3) via bolts; a length adjustment module is provided between the two bottom plates (2); a width adjustment module is provided on the top of the bottom plates (2); and a steering test module is provided at a position near the rear of the top of the automobile body (1) located at the front side.

2. The EPS in-the-loop simulation test bench according to claim 1, characterized in that: The steering test module comprises a steering tie rod (10), a connecting rod (12), a connecting block (13), a connecting groove (14), a spring groove (15), a compression spring (18), a limit buckle (19) and an inclined surface (20). The front side of the bottom end of the automobile body (1) is provided with a steering tie rod (10), both ends of the steering tie rod (10) are movably connected to the connecting blocks (13), the surfaces of the connecting blocks (13) are provided with connecting grooves (14), both ends of the steering tie rod (10) are movably inserted into the interior of the connecting groove (14), the interior of the connecting groove (14) is provided with a spring groove (15), the interior of the spring groove (15) is slidably installed with a limit buckle (19), a compression spring (18) is movably installed between the limit buckle (19) and the interior of the spring groove (15), the limit buckle (19) is movably inserted into the interior of both ends of the steering tie rod (10), and one side surface of the limit buckle (19) is provided with an inclined surface (20).

3. The EPS in-the-loop simulation test bench according to claim 2, characterized in that: The steering test module further comprises a stepper motor (16), a cross shaft (17) and a cross matching groove (21); the stepper motor (16) is fixedly mounted on both sides of the connection block (13); the output end of the stepper motor (16) is connected to the cross shaft (17) via a coupling; the cross shaft (17) movably penetrates the interior of the spring groove (15) and extends to the interior of the limit buckle (19); a cross matching groove (21) is provided on one side of the limit buckle (19) close to the cross shaft (17); and the cross shaft (17) is movably inserted into the interior of the cross matching groove (21).

4. The EPS in-the-loop simulation test bench according to claim 1, characterized in that: The steering test module further comprises a pushing groove (22), a matching slider (23), a movable rod (24), a movable rod inner groove (25), a pressing spring (26), a rotating rod (27) and a fixed rod (28). The rear sides of the two movable bases (3) located at the front side are each provided with a pushing groove (22). The outer end of the connecting rod (12) is movably mounted with a movable rod (24). The inside of the movable rod (24) is provided with a movable rod inner groove (25). The outer end of the connecting rod (12) is movably inserted into the inside of the movable rod inner groove (25). A pressing spring (26) is movably installed between the connecting rod (12) and the inside of the movable rod inner groove (25). The outer end of the movable rod (24) is each fixedly mounted with a rotating rod (27). The outer surface of the rotating rod (27) is rotatably connected to the fixed rod (28). One end of the fixed rod (28) is fixedly mounted with a matching slider (23). The matching slider (23) is slidably inserted into the inside of the pushing groove (22).

5. The EPS in-the-loop simulation test bench according to claim 3, characterized in that: The length adjustment module comprises a telescopic outer rod (6), a telescopic inner rod (7) and a telescopic slot (11); three telescopic outer rods (6) are fixedly mounted on the front surface of the bottom plate (2) located at the rear side; three telescopic inner rods (7) are fixedly mounted on the rear surface of the bottom plate (2) located at the front side; the telescopic outer rods (6) are each provided with a telescopic slot (11) inside; and the telescopic inner rods (7) are each slidably inserted into the inside of the telescopic slot (11).

6. The EPS in-the-loop simulation test bench according to claim 1, characterized in that: The width adjustment module comprises a movable base (3), a movable guide rail (8) and a sliding block (9); the top end of the bottom plate (2) is provided with three movable guide rails (8); the bottom end of the movable base (3) is fixedly mounted with three sliding blocks (9); the sliding blocks (9) are slidably inserted into the interior of the movable guide rails (8).

7. The EPS in-the-loop simulation test bench according to claim 1, characterized in that: A servo motor is provided inside the movable base (3), the output end of the servo motor is connected to a driving gear with a coupling, the outer side of the driving gear is meshedly connected to a driven rack, and one end of the driven rack is fixedly connected to a matching slider (23).

8. An EPS in-the-loop simulation test system, characterized in that: The EPS in-loop simulation test bench is equipped with an EPS in-loop simulation test system, and the EPS in-loop simulation test system comprises a load motor (4), an axle (5), an EPS power unit, a torque sensor, a signal adapter box, a PXI controller, a LAN adapter box, a signal generator, an IPC and a programmable power supply; The EPS power unit comprises an EPS motor, an electric steering module, a steering tie rod (10) and a steering wheel, the EPS motor being electrically connected to the electric steering module, the electric steering module being mounted on the surface of the steering tie rod (10), the electric steering module being electrically connected to the steering wheel, and the electric steering module being connected to a signal adapter box via CAN communication.

9. The EPS in-the-loop simulation test system according to claim 8, characterized in that: The signal transfer box is connected to four load motors (4) via CAN communication, and torque sensors are provided at the output ends of the load motors (4), and the torque sensors are connected to signal lines of the signal transfer box.

10. The EPS in-the-loop simulation test system according to claim 9, characterized in that: The signal transfer box is connected to the PXI controller via CAN communication, and the PXI controller controls the signal transfer box via IO, the PXI controller is connected to the programmable power supply via LAN, the programmable power supply is connected to the signal transfer box via a power supply line, the signal transfer box is connected to the signal generator via a signal line, the signal generator is connected to the LAN transfer box via LAN, the LAN transfer box is connected to the PXI controller via LAN, and the LAN transfer box is connected to the IPC via LAN.

Images