Rotating hub test platform for automatic driving simulation test

Abstract

The utility model relates to the technical field of automobile test equipment, and discloses a rotating hub test platform for an automatic driving simulation test, which comprises a rectangular frame adjustable along the length direction of an automobile body, a test board in contact with wheels is arranged on the frame, and the frame comprises slide rail boundary beams on two sides and telescopic boundary beams at two ends of the slide rail boundary beams. The test bench is slidably connected with the slide rail boundary beam. The test board comprises a base and a mounting plate located above the base and rotationally connected with the base, a steering assembly is arranged between the base and the mounting plate, a rotating assembly is arranged above the mounting plate, the steering assembly drives the mounting plate and the rotating assembly above the mounting plate to rotate so as to simulate wheel steering, and the rotating assembly drives the wheels so as to simulate the rotating speed of the wheels. Therefore, the running states of the vehicle under various working conditions are comprehensively tested, high-precision correspondence between the simulation platform and an actual road is ensured, and the dynamic characteristics of the vehicle are truly represented.

Description

Technical Field

[0001] This utility model belongs to the field of automotive testing equipment technology, specifically relating to a rotating test platform for autonomous driving simulation testing. Background Technology

[0002] Currently, the global automotive industry is undergoing a massive transformation centered on autonomous driving technology. With the rapid development of intelligent driving technology, automobiles are gradually evolving from simple means of transportation into intelligent mobile platforms integrating information communication, environmental perception, and decision-making control. Countries worldwide regard autonomous driving technology as a crucial strategic direction for improving traffic efficiency, enhancing traffic safety, and optimizing urban planning. In China, as the world's largest automobile consumer market, the development of intelligent vehicles has been incorporated into the national science and technology innovation strategy, with both industry and academia vigorously promoting the rapid development of intelligent and connected vehicles.

[0003] However, autonomous driving systems face enormous technical challenges and testing requirements in the actual implementation process. Traditional real-vehicle road testing is not only costly, but also has many limitations such as long testing cycles, high safety risks, and limited scenario coverage. In particular, it is difficult to test frequently and efficiently in extreme conditions (such as severe weather and emergency obstacle avoidance) and special scenarios (such as complex intersections and unstructured roads), which seriously restricts the development of autonomous driving technology and the process of commercial application.

[0004] In autonomous driving simulation tests, there is often a problem that the dynamic characteristics of vehicles are difficult to reproduce realistically, which makes it impossible for the simulation platform to achieve a high degree of correspondence with the actual road. This results in a significant difference between the simulation environment and the real world, which in turn poses a systemic risk to the research, development, testing and deployment of autonomous driving systems. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a rotating test platform for autonomous driving simulation experiments, so as to solve the technical problem that the simulation platform and the actual road cannot achieve high-precision correspondence in the prior art, and the dynamic characteristics of the vehicle are difficult to reproduce realistically.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An autonomous driving simulation test platform includes a rectangular frame adjustable along the length of the vehicle body. A test bench that contacts the wheels is mounted on the frame. The frame includes sliding side beams on both sides and telescopic side beams at both ends of the sliding side beams. The test bench is slidably connected to the sliding side beams. The distribution position of the test bench can be adjusted by the sliding side beams and telescopic side beams to adapt to the wheel track and wheelbase of different vehicles. The test bench includes a base and a mounting plate located above the base and rotatably connected to the base. A steering component is provided between the base and the mounting plate. A rotating component is provided above the mounting plate. The steering component drives the mounting plate and the rotating component above it to rotate, thereby simulating wheel steering. The rotating component drives the wheels, thereby simulating wheel speed.

[0008] Furthermore, guide rails are provided on the inner side surfaces of the side beams of both slide rails along the length of the side beams. The sliders are slidably connected to the side beams of the slide rails through the guide rails, and the test platform corresponds to the sliders one by one.

[0009] Furthermore, two sliders are slidably connected on the single-sided slide rail side beam, and the test platform is fixedly connected to the sliders via connecting blocks;

[0010] Furthermore, the telescopic side beam includes a first telescopic side beam on one side and a second telescopic side beam on the opposite side. The first telescopic side beam includes a first outer sleeve and a first inner core rod that are slidably connected. The inner end of the first inner core rod extends into the first outer sleeve through the inner end opening of the first outer sleeve. A lead screw is helically connected to the center of the first inner core rod along the rod body direction. The lead screw passes through the outer end of the first outer sleeve and protrudes out. The second telescopic side beam includes a second outer sleeve and a second inner core rod that are slidably connected. The inner end of the second inner core rod extends into the second outer sleeve through the inner end opening of the second outer sleeve.

[0011] Furthermore, the steering assembly includes a limiting protrusion disposed on the top surface of the base. The limiting protrusion includes a lower cam and an upper cam. A connecting shaft is integrally formed at the center of the bottom surface of the mounting plate. A receiving groove is opened at the center of the bottom surface of the connecting shaft. A connecting groove is opened at the center of the bottom of the receiving groove. The inner diameter of the connecting groove is the same as the diameter of the cam. The cam passes through the receiving groove and extends into the connecting groove. A second bearing is provided in the receiving groove.

[0012] Furthermore, a servo motor is provided on one side of the limiting protrusion, a transmission gear is sleeved on the output shaft of the servo motor, and an external gear is sleeved around the connecting shaft, with the transmission gear meshing with the external gear;

[0013] Furthermore, the rotating assembly includes supports located on both sides of the top surface of the mounting plate, with shaft holes on the top of the supports, and a roller between the two supports. A sealing plate is provided on one end face of the roller, and a bracket is provided on the other end of the roller. The bracket is located inside the roller, and mounting shafts are provided at both ends of the roller. The mounting shafts pass through the shaft holes, and the roller is rotatably connected to the two supports.

[0014] Furthermore, the feature is that a flange is provided inside the bracket, a boss is formed on the side of the flange away from the bracket, a keyway is provided on the end face of the boss, a motor is provided inside the flange, the motor is bolted to the flange, and a key is formed at the free end of the motor output shaft that matches the keyway. The key is inserted into the keyway to transmit torque and prevent relative rotation.

[0015] The beneficial effects of this utility model are as follows:

[0016] Compared with existing technologies, this method uses a motor to drive the roller to rotate, thereby causing the wheels to rotate. The speed of the roller can be adjusted according to the test requirements to simulate different vehicle speeds. In addition, a servo motor drives the connecting shaft to rotate, thereby causing the test stand to rotate and simulating wheel steering. This comprehensively tests the vehicle's operating status under various working conditions, ensuring a high degree of accuracy between the simulation platform and the actual road, and realistically reproducing the vehicle's dynamic characteristics. Attached Figure Description

[0017] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0018] Figure 1 This is a schematic diagram of the overall design of the rotating test platform for autonomous driving simulation testing in Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of the slide rail side beam in Embodiment 1 of this utility model;

[0020] Figure 3 This is a cross-sectional view of the first telescopic side beam in Embodiment 1 of this utility model;

[0021] Figure 4 for Figure 3 Enlarged view at point A1;

[0022] Figure 5 This is a cross-sectional view of the second telescopic side beam in Embodiment 1 of this utility model;

[0023] Figure 6 This is a schematic diagram of the first test stand in Embodiment 1 of this utility model;

[0024] Figure 7 This is a cross-sectional view of the first test bench in Embodiment 1 of this utility model;

[0025] Figure 8 for Figure 7 Enlarged view at point A2;

[0026] Figure 9 This is a schematic diagram of the inside of the drum in Embodiment 1 of this utility model;

[0027] Figure 10This is a schematic diagram of the bracket in Embodiment 1 of this utility model;

[0028] Figure 11 This is a schematic diagram of the flange in Embodiment 1 of this utility model;

[0029] Figure 12 This is a schematic diagram of the second test stand in Embodiment 1 of this utility model.

[0030] The following labels are shown in the attached diagram:

[0031] Frame 1, slide rail side beam 101, guide rail 102, slider 103, connecting block 104, telescopic side beam 105, first telescopic side beam 106, first outer sleeve 107, first inner core rod 108, lead screw 109, first bearing 110, handle 111, second telescopic side beam 112, second outer sleeve 113, second inner core rod 114, test platform 2, first test platform 201, base 202, mounting plate 203, limiting protrusion 204, convex plate 2041, convex shaft 2042, connecting shaft 205, receiving groove 206, connecting groove 2061, second bearing 207, servo motor 208, transmission gear 209, external gear 210, support 211, shaft hole 212, roller 213, mounting shaft 214, third bearing 215, bracket 216, flange 217, keyway 218, motor 219, second test platform 220. Detailed Implementation

[0032] Example 1, specifically as follows Figures 1-12 As shown.

[0033] A rotating test platform for autonomous driving simulation testing includes a rectangular frame 1 that is adjustable along the length of the vehicle body, and a test bench 2 that contacts the wheels is provided on the frame 1.

[0034] like Figure 1 As shown, the frame 1 includes two side rail beams 101 and telescopic side beams 105 located at both ends of the side rail beams 101. The telescopic side beams 105 are used to adjust the size of the frame 1. The test platform 2 is slidably connected to the side rail beams 101. Guide rails 102 are provided on the inner surfaces of the side rail beams 101 along the length of the side beam. The sliders 103 are slidably connected to the side rail beams 101 through the guide rails 102. The test platform 2 corresponds one-to-one with the sliders 103. In this embodiment, two sliders 103 are slidably connected to one side rail beam 101, and the test platform 2 is fixedly connected to the sliders 103 through connecting blocks 104.

[0035] The telescopic side beam 105 includes a first telescopic side beam 106 on one side and a second telescopic side beam 112 on the opposite side. The first telescopic side beam 106 includes a first outer sleeve 107 and a first inner core rod 108 that are slidably connected. The inner end of the first inner core rod 108 extends into the first outer sleeve 107 through an opening at the inner end of the first outer sleeve 107. The outer ends of the first outer sleeve 107 and the first inner core rod 108 are welded and fixed to the two side rail side beams 101 respectively. A lead screw 109 is helically connected to the center of the first inner core rod 108 along the rod body direction. The lead screw 109 passes through the outer end of the first outer sleeve 107 and protrudes, forming a free end. A first bearing 110 is sleeved at the connection between the lead screw 109 and the first outer sleeve 107 to reduce rotational friction between the lead screw 109 and the first outer sleeve 107. A handle 111 is welded to the free end of the lead screw 109, and rotational force is applied to the lead screw 109 by rotating the handle 111.

[0036] The second telescopic side beam 112 includes a second outer sleeve 113 and a second inner core rod 114 that are slidably connected. The inner end of the second inner core rod 114 extends into the second outer sleeve 113 through the inner end opening of the second outer sleeve 113. The outer ends of the second outer sleeve 113 and the outer ends of the second inner core rod 114 are respectively welded and fixed to the side rail side beams 101 on both sides.

[0037] During use, the distribution of the test bench 2 needs to be adjusted according to the different sizes of vehicles to ensure that the wheels are in contact with the test bench 2. First, the distance between the two test benches 2 on the same slide rail side beam 101 can be adjusted by the guide rail 102 and the slider 103 to adapt to the wheel track of the vehicle. Then, the handle 111 is turned, and the lead screw 109 rotates accordingly. Driven by the lead screw 109, the first inner core rod 108 moves along the rod body direction to adjust the distance between the two slide rail side beams 101 to adapt to the wheel track of the vehicle.

[0038] By setting the slide rail side beam 101 and telescopic side beam 105, the distribution position of the test platform 2 can be adjusted along the length and width directions of the frame 1, thereby meeting the needs of vehicles of different models and chassis sizes and improving the applicability of the entire rotating test platform.

[0039] Test bench 2 includes a first test bench 201 that contacts the driven wheels of the vehicle. The first test bench 201 includes a base 202 and a mounting plate 203 located above the base 202 and rotatably connected to the base 202. A steering component is provided between the base 202 and the mounting plate 203. A rotating component is provided above the mounting plate 203. The steering component drives the mounting plate and the rotating component above it to rotate, thereby simulating wheel steering. The rotating component drives the wheel, thereby simulating wheel speed.

[0040] like Figure 6As shown, the side of the base 202 is connected and fixed to the connecting block 104 by bolts. Its interior is hollowed out to reduce its weight, making the entire rotating test platform lighter. The steering assembly includes a limiting protrusion 204 located at the center of the top surface of the base 202. The limiting protrusion 204 is integrally formed with the base 202. The limiting protrusion 204 includes a lower cam 2041 and a cam shaft 2042 located in the middle of the cam 2041 and extending in a direction away from the cam 2041. A connecting shaft 205 is integrally formed at the center of the bottom surface of the mounting plate 203. The diameter of the connecting shaft 205 is the same as the diameter of the cam 2041. A receiving groove 206 is formed at the center of the bottom surface of the connecting shaft 205, and a connecting groove 2061 is formed at the center of the bottom of the receiving groove 206. The inner diameter of the connecting groove 2061 is the same as the diameter of the cam shaft 2042.

[0041] During installation, the cam 2042 passes through the receiving groove 206 and extends into the connecting groove 2061. At this time, the bottom surface of the connecting shaft 205 contacts the top surface of the cam 2041. The receiving groove 206 is provided with a second bearing 207. The inner and outer rings of the second bearing 207 are interference-fitted with the cam 2042 and the receiving groove 206, respectively. The rotational friction between the limiting protrusion 204 and the connecting shaft 205 is reduced by the second bearing 207.

[0042] A servo motor 208 is provided on one side of the limiting protrusion 204. The servo motor 208 is fixed to the top surface of the base 202 by bolts. The output shaft of the servo motor 208 is vertically upward and a transmission gear 209 is sleeved on the output shaft. The transmission gear 209 is connected to the output shaft of the servo motor 208 by a key. An external gear 210 is sleeved around the connecting shaft 205. The external gear 210 is also connected to the connecting shaft 205 by a key. The transmission gear 209 meshes with the external gear 210.

[0043] The rotating assembly includes triangular supports 211 located on both sides of the top surface of the mounting plate 203. The supports 211 are bolted to the mounting plate 203, and the top of the supports 211 has a shaft hole 212. A roller 213 is provided between the two supports 211. A sealing plate is welded to one end face of the roller 213, and a bracket 216 is welded to the other end of the roller 213. The bracket 216 is located inside the roller 213. Both ends of the roller 213 are provided with mounting shafts 214, which pass through the shaft holes 212. The roller 213 is rotatably connected to the two supports 211. One end of the mounting shaft 214 is welded to the sealing plate, and the other end of the mounting shaft 214 is welded to the bracket 216. A third bearing 215 is provided between the mounting shaft 214 and the shaft hole 212. The third bearing 215 has inner and outer rings that are interference-fitted with the mounting shaft 214 and the shaft hole 212, respectively.

[0044] A flange 217 is provided inside the bracket 216. The flange 217 is fixed to the bracket 216 by bolts. A boss is formed on the side of the flange 217 away from the bracket 216, and a keyway 218 is formed on the end face of the boss. A motor 219 is provided inside the flange 217. The motor 219 is fixed to the flange 217 by bolts. A key is formed on the free end of the output shaft of the motor 219, which mates with the keyway 218. The key is inserted into the keyway 218 to transmit torque and prevent relative rotation.

[0045] Test bench 2 includes a second test bench 220 that contacts the vehicle's drive wheels. The second test bench 220 also includes a base 202 and a mounting plate 203 located above and rotatably connected to the base 202. A steering assembly is provided between the base 202 and the mounting plate 203 to simulate wheel steering. A rotation assembly is provided above the mounting plate 203 to simulate wheel speed. The difference between the second test bench 220 and the first test bench 201 is that the supports 211 in the second test bench 220 are M-shaped, with shaft holes 212 at both ridge points on the top. Two rollers 213 are spaced apart between the two supports 211, and both rollers 213 contact the wheels. The wheels are supported and limited by the two rollers 213 to prevent the vehicle from detaching from the test bench 2 during testing.

[0046] In use, the roller 213 is driven to rotate by the motor 219, which in turn causes the wheels to rotate. The rotation speed of the roller 213 can be adjusted according to the test requirements to simulate different vehicle speeds. In addition, the connecting shaft 205 is driven to rotate by the servo motor 208, which in turn causes the test stand 2 to rotate, simulating wheel steering. This comprehensively tests the vehicle's operating status under various working conditions, ensuring a high degree of accuracy between the simulation platform and the actual road, and realistically reproducing the dynamic characteristics of the vehicle.

[0047] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A rotating test platform for autonomous driving simulation testing, characterized in that, The system includes an adjustable rectangular frame along the length of the vehicle body, with a test platform on the frame that contacts the wheels. The frame includes sliding side beams on both sides and telescopic side beams at both ends of the sliding side beams. The test platform is slidably connected to the sliding side beams. The distribution position of the test platform can be adjusted by the sliding side beams and telescopic side beams to adapt to different vehicle track widths and wheelbases. The test platform includes a base and a mounting plate located above the base and rotatably connected to the base. A steering component is located between the base and the mounting plate, and a rotating component is located above the mounting plate. The steering component drives the mounting plate and the rotating component above it to rotate, thereby simulating wheel steering. The rotating component drives the wheels, thereby simulating wheel speed.

2. The rotating test platform for autonomous driving simulation testing according to claim 1, characterized in that, Guide rails are provided on the inner side surfaces of the side beams on both sides along the length of the side beams. The slider is slidably connected to the side beams of the side beams through the guide rails. The test platform and the slider correspond one-to-one.

3. The rotating test platform for autonomous driving simulation testing according to claim 2, characterized in that, Two sliders are slidably connected on the side rail beam of a single-sided slide rail, and the test bench is fixedly connected to the sliders via a connecting block.

4. The rotating test platform for autonomous driving simulation testing according to claim 1, characterized in that, The telescopic side beam includes a first telescopic side beam on one side and a second telescopic side beam on the opposite side. The first telescopic side beam includes a first outer sleeve and a first inner core rod that are slidably connected. The inner end of the first inner core rod extends into the first outer sleeve through the inner end opening of the first outer sleeve. A lead screw is helically connected to the center of the first inner core rod along the direction of the rod body. The lead screw passes through the outer end of the first outer sleeve and protrudes out. The second telescopic side beam includes a second outer sleeve and a second inner core rod that are slidably connected. The inner end of the second inner core rod extends into the second outer sleeve through the inner end opening of the second outer sleeve.

5. The rotating test platform for autonomous driving simulation testing according to claim 1, characterized in that, The steering assembly includes a limiting protrusion on the top surface of the base. The limiting protrusion includes a lower cam and an upper cam. A connecting shaft is integrally formed at the center of the bottom surface of the mounting plate. A receiving groove is opened at the center of the bottom surface of the connecting shaft. A connecting groove is opened at the center of the bottom of the receiving groove. The inner diameter of the connecting groove is the same as the diameter of the cam. The cam passes through the receiving groove and extends into the connecting groove. A second bearing is provided in the receiving groove.

6. The rotating test platform for autonomous driving simulation testing according to claim 5, characterized in that, A servo motor is provided on one side of the limiting protrusion. A transmission gear is sleeved on the output shaft of the servo motor, and an external gear is sleeved around the connecting shaft. The transmission gear meshes with the external gear.

7. The rotating test platform for autonomous driving simulation testing according to claim 1, characterized in that, The rotating assembly includes supports located on both sides of the top surface of the mounting plate. The top of the supports has shaft holes, and a roller is provided between the two supports. A sealing plate is provided on one end face of the roller, and a bracket is provided on the other end of the roller. The bracket is located inside the roller, and both ends of the roller are provided with mounting shafts that pass through the shaft holes. The roller is rotatably connected to the two supports.

8. The rotating test platform for autonomous driving simulation testing according to claim 7, characterized in that, The bracket has a flange inside, and a boss is formed on the side of the flange away from the bracket. A keyway is opened on the end face of the boss. A motor is installed inside the flange. The motor is bolted to the flange. A key is formed on the free end of the motor output shaft that matches the keyway. The key is inserted into the keyway to transmit torque and prevent relative rotation.

Images