Cross-country road device for vehicle road test and test method

Abstract

The invention relates to a cross-country road device for a vehicle road test and a test method, and the device comprises a plurality of rows of installation racks which extend in the width direction of a cross-country road, and the plurality of rows of installation racks are sequentially arranged at intervals in the length direction of the cross-country road; the number of the test rollers is multiple, the multiple test rollers are rotatably connected to the installation racks through roller supports, and the multiple test rollers on the installation racks are coaxially arranged at intervals; the number of the jacking mechanisms is multiple, and the multiple jacking mechanisms are located between the rolling wheel support and the installation rack so as to vertically adjust the supporting height of each test rolling wheel. The support height of each test roller is adjusted by adjusting the telescopic length of each jacking mechanism, so that a variable road surface mechanism for setting bumpy road conditions is formed, the bumpy road conditions of the variable road surface mechanism can be freely adjusted according to test requirements, the flexibility of the cross-country road test is improved, and the construction cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of vehicle road testing, and particularly relates to an off-road road device and a test method for vehicle road tests. Background Art

[0002] Automobile site simulation test is a necessary way to test the qualification of automobile production and an effective method to test the performance and quality of automobiles. With the continuous development of technology, the construction investment in automobile simulation tests is also increasing.

[0003] In traditional automobile site simulation tests, a test site with a specified test environment is usually built to obtain the vehicle mass or vehicle performance data of the automobile in different environments or different road conditions, and it is used to improve or enhance the quality and performance in automobile R & D.

[0004] However, traditional automobile test sites require a large site area, and a large amount of manpower and material resources are also consumed during the process of testing the performance and quality of automobiles on the test site. Not only is the test cost high, but the test efficiency is not efficiently reflected. Summary of the Invention

[0005] An embodiment of this application provides an off-road road device and a test method for vehicle road tests to solve the problem in related technologies that automobile test sites need to build test sites with different environments or different road conditions, resulting in a large site area and high costs.

[0006] A first aspect of an embodiment of this application provides an off-road road device for vehicle road tests, including: a variable road surface mechanism, and the variable road surface mechanism includes:

[0007] An installation frame, and multiple rows of the installation frames are provided. Each row of the installation frames extends along the width direction of the off-road road, and the multiple rows of the installation frames are arranged at intervals in sequence along the length direction of the off-road road;

[0008] Test rollers, and multiple test rollers are provided. The multiple test rollers are rotatably connected to each of the installation frames through roller brackets, and the multiple test rollers on each of the installation frames are arranged at intervals coaxially;

[0009] A jacking mechanism, and multiple jacking mechanisms are provided. The multiple jacking mechanisms are respectively located between the roller brackets and the installation frames to vertically adjust the support height of each of the test rollers, and the roller brackets are vertically slidably connected to the installation frames.

[0010] In some embodiments: Multiple longitudinal sliding rails extending along the length direction of the off-road road are provided at the bottoms of the multiple installation frames, and the multiple longitudinal sliding rails are parallel to each other and arranged at intervals along the width direction of the off-road road;

[0011] A plurality of the mounting racks are slidably connected to a plurality of the longitudinal slide rails, and a telescopic mechanism is connected between two adjacent mounting racks, and the telescopic mechanism is used to adjust the distance between two adjacent mounting racks.

[0012] In some embodiments: The test roller includes an outer drum, and a motor stator fixedly located inside the outer drum. A motor rotor fixedly connected to the roller bracket is arranged inside the motor stator, and the motor stator is connected to a controller for adjusting the torque.

[0013] In some embodiments: The motor stator of each test roller is connected to a storage battery, and anti-slip ribs are welded on the outer drum or a rubber anti-slip layer is wrapped on the outer drum.

[0014] In some embodiments: An annular cavity is arranged on the inner wall of the test roller, and a drum brake fixed to the roller bracket is arranged in the cavity of the test roller. The drum brake is used to control the rotational resistance of the test roller, and the brake pads of the drum brake are frictionally and slidably connected to the inner wall of the test roller.

[0015] In some embodiments: A plurality of the jacking mechanisms are all hydraulic cylinders. The cylinder body of the hydraulic cylinder is connected to a hydraulic pump through a hydraulic valve, and the hydraulic valve is connected to a controller. The controller controls the extension length of each hydraulic cylinder through the hydraulic valve.

[0016] In some embodiments: It further includes a vehicle cleaning mechanism. The vehicle cleaning mechanism is arranged on the off-road road and is located upstream of the variable road surface mechanism. The vehicle cleaning mechanism includes a water storage tank in an inverted trapezoid structure. A water spraying mechanism is arranged on one side of the water storage tank, and an air jetting mechanism is arranged on one side of the water storage tank.

[0017] In some embodiments: A laser pair sensor for the tested vehicle is arranged on one side of the water storage tank. The laser pair sensor is connected to a controller. The controller is used to control the water spraying mechanism to spray a water column onto the chassis of the vehicle, and the controller is used to control the air jetting mechanism to spray compressed gas onto the chassis of the vehicle.

[0018] In some embodiments: Both ends of each test roller are connected to the roller bracket through universal hinge shafts. Two sets of the jacking mechanisms are arranged between each roller bracket and the mounting rack, and the two sets of jacking mechanisms jack up both ends of the test roller with the same or different extension lengths.

[0019] In the second aspect of the embodiments of the present application, a test method for an off-road road device for vehicle road tests is provided. The method uses the off-road road device for vehicle road tests described in any of the above embodiments. The method includes:

[0020] According to the test conditions of the off-road road for the vehicle to be tested, adjust the lifting height of each test roller through the lifting mechanism so that multiple test rollers jointly form a bumpy road surface;

[0021] Drive the vehicle to be tested in a circular motion on the off-road road, and start recording the road test data when the vehicle to be tested enters the bumpy road surface jointly formed by each test roller;

[0022] According to the road test data, adjust the lifting height of each test roller up or down again through the lifting mechanism, and adjust the distance between two adjacent installation frames;

[0023] Drive the vehicle to be tested in a circular motion on the off-road road again, and record the road test data again when the vehicle to be tested enters the bumpy road surface jointly formed by each test roller;

[0024] According to the road test data, adjust the inclination angle of each test roller again through the lifting mechanism;

[0025] Drive the vehicle to be tested in a circular motion on the off-road road again, and record the road test data again when the vehicle to be tested enters the bumpy road surface jointly formed by each test roller;

[0026] During or after the test of the vehicle to be tested, drive the vehicle to be tested into the storage pool, and use the water spraying mechanism and the air jet mechanism to clean the chassis of the vehicle to be tested.

[0027] The beneficial effects brought by the technical solution provided by this application include:

[0028] This application embodiment provides an off-road road device and a test method for vehicle road tests. Since the off-road road device for vehicle road tests in this application is provided with installation frames, there are multiple rows of the installation frames, and each row of installation frames extends along the width direction of the off-road road, and multiple rows of installation frames are arranged at intervals in sequence along the length direction of the off-road road; test rollers, there are multiple test rollers, and the multiple test rollers are rotatably connected to each installation frame through roller brackets, and the multiple test rollers on each installation frame are arranged at intervals coaxially; a lifting mechanism, there are multiple lifting mechanisms, and the multiple lifting mechanisms are respectively located between the roller brackets and the installation frames to vertically adjust the support height of each test roller, and the roller brackets are vertically slidably connected to the installation frames.

[0029] Therefore, the off-road road device for vehicle road tests in this application is provided with multiple rows of mounting racks on the off-road road. Each row of mounting racks extends along the width direction of the off-road road, and the multiple rows of mounting racks are arranged at intervals in sequence along the length direction of the off-road road. Test rollers are rotatably connected to each row of mounting racks through roller brackets. A jacking mechanism for vertically adjusting the support height of each test roller is provided between the roller brackets and the mounting racks. Each jacking mechanism adjusts the support height of each test roller by adjusting its own telescopic length, thereby forming a variable road surface mechanism with a set bumpy road condition. The bumpy road condition of the variable road surface mechanism can be freely adjusted according to test requirements, improving the flexibility of off-road road tests and reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is the front view of the structure of the variable road surface mechanism in the embodiment of this application;

[0032] Figure 2 It is the top view of the structure of the variable road surface mechanism in the embodiment of this application;

[0033] Figure 3 It is the front view of the structure of the vehicle cleaning mechanism in the embodiment of this application.

[0034] Reference Numerals:

[0035] 10. Variable road surface mechanism; 11. Mounting rack; 12. Test roller; 13. Jacking mechanism; 14. Roller bracket; 15. Telescopic mechanism; 16. Longitudinal slide rail;

[0036] 20. Vehicle cleaning mechanism; 21. Water storage tank; 22. Water spraying mechanism; 23. Air jetting mechanism; 30. Vehicle under test; 40. Off-road road. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the drawings in the embodiments of this application. Obviously, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts fall within the scope of protection of this application.

[0038] The embodiments of the present application provide an off-road road device and a test method for vehicle road tests, which can solve the problems in the related art that the test sites with different environments or road conditions need to be built in an automobile test field, resulting in a large consumption of site area and high costs.

[0039] Referring to Figure 1 and Figure 2 As shown, in the first aspect of the embodiments of the present application, an off-road road device for vehicle road tests is provided, including: a variable road surface mechanism 10, which is used to simulate a bumpy road surface and includes:

[0040] An installation rack 11, which is a rectangular frame structure welded by steel profiles. There are multiple rows of the installation rack 11, and the specific number of the installation rack 11 is specifically set according to the length of the bumpy road surface. Each row of the installation rack 11 extends along the width direction of the off-road road 40, and multiple rows of the installation rack 11 are arranged at intervals in sequence along the length direction of the off-road road.

[0041] Test rollers 12, there are multiple of the test rollers 12. The multiple test rollers 12 are rotatably connected to each installation rack 11 through roller brackets 14. The multiple test rollers 12 on each installation rack 11 are arranged at intervals coaxially; the multiple test rollers 12 on multiple rows of the installation rack 11 are arranged in a whole row along the length direction and the width direction of the off-road road 40.

[0042] Lifting mechanisms 13, there are multiple of the lifting mechanisms 13. The multiple lifting mechanisms 13 are respectively located between the roller brackets 14 and the installation rack 11 to vertically adjust the support height of each test roller 12. The roller bracket 14 is vertically slidably connected to the installation rack 11, and the lifting mechanism 13 realizes the adjustment of the support height of each test roller 12 by driving the roller bracket 14 to move up and down relative to the installation rack 11.

[0043] In the off-road road device for vehicle road tests of the embodiments of the present application, multiple rows of installation racks 11 are arranged on the off-road road 40. Each row of the installation rack 11 extends along the width direction of the off-road road 40, and multiple rows of the installation rack 11 are arranged at intervals in sequence along the length direction of the off-road road 40. Test rollers 12 are rotatably connected to each row of the installation rack 11 through roller brackets 14, and lifting mechanisms 13 for vertically adjusting the support height of each test roller 12 are arranged between the roller brackets 14 and the installation rack 11.

[0044] In actual use, each jacking mechanism 13 adjusts the support height of each test roller 12 by adjusting its own telescopic length, thereby forming a variable road surface mechanism 10 for a set bumpy road condition. The bumpy road condition of the variable road surface mechanism 10 can be freely adjusted according to test requirements. For example, a pit with a set depth, set width, and length can be formed by the cooperation of multiple test rollers 12, or a protrusion with a set height, set width, and length can be formed, improving the flexibility of off-road road tests and reducing construction costs.

[0045] In some alternative embodiments: Refer to Figure 1 and Figure 2 As shown, an off-road road device for vehicle road tests provided by an embodiment of the present application has a plurality of longitudinal slide rails 16 extending along the length direction of the off-road road 40 at the bottom of a plurality of mounting frames 11. The plurality of longitudinal slide rails 16 are parallel to each other and spaced apart along the width direction of the off-road road 40.

[0046] The plurality of mounting frames 11 are slidably connected to the plurality of longitudinal slide rails 16, and a telescopic mechanism 15 is connected between two adjacent mounting frames 11 to adjust the distance between two adjacent mounting frames 11. The telescopic mechanism 15 is preferably but not limited to a hydraulic cylinder, and at least two spaced telescopic mechanisms 15 are provided between two adjacent mounting frames 11.

[0047] When it is necessary to adjust the distance between two adjacent mounting frames 11, the telescopic mechanism 15 is controlled to extend or retract to drive two adjacent mounting frames 11 to slide on the longitudinal slide rails 16, thereby realizing the adjustment of the distance between the test rollers 12 on two adjacent mounting frames 11 and meeting the width control of the pit for the bumpy road surface.

[0048] In some alternative embodiments: Refer to Figure 1 and Figure 2 As shown, an off-road road device for vehicle road tests provided by an embodiment of the present application has a test roller 12 including an outer drum and a motor stator (not shown in the figure) fixedly located inside the outer drum. A motor rotor (not shown in the figure) fixedly connected to a roller bracket 14 is provided inside the motor stator, and a controller (not shown in the figure) for adjusting the driving torque is connected to the motor stator.

[0049] The controller applies an exciting current to the motor stator to apply a driving torque to the test roller 12, thereby adjusting the frictional resistance between the wheel of the vehicle under test 30 and the test roller 12, and further simulating the adhesion coefficient between the wheel of the vehicle under test 30 and the bumpy road surface. When the test roller 12 rotates forward, the adhesion coefficient is larger when the driving torque is larger; when the test roller 12 rotates backward, the adhesion coefficient is smaller when the driving torque is larger.

[0050] In some alternative embodiments: Refer to Figure 1 and Figure 2 As shown, the embodiments of the present application provide an off-road road device for vehicle road tests. The motor stator of each test roller 12 of the off-road road device is connected to an energy storage battery (not shown in the figure). Anti-slip ribs (not shown in the figure) are welded on the outer layer drum or a rubber anti-slip layer (not shown in the figure) is wrapped around it.

[0051] When the wheels of the vehicle under test 30 come into contact and friction with the test roller 12, when the wheels of the vehicle under test 30 drive the test roller 12 to rotate, the motor stator in the test roller 12 rotates relative to the motor rotor to cut the magnetic induction lines for power generation and store the energy in the energy storage battery. The anti-slip ribs welded on the outer layer drum or the rubber anti-slip layer wrapped around it can significantly increase the friction force between the wheels of the vehicle under test 30 and the test roller 12.

[0052] In some alternative embodiments: Refer to Figure 1 and Figure 2 As shown, the embodiments of the present application provide an off-road road device for vehicle road tests. An annular cavity is provided on the inner wall of the test roller 12 of the off-road road device, and a drum brake (not shown in the figure) fixed to the roller bracket 14 is provided in the cavity of the test roller 12. The drum brake is used to control the rotational resistance of the test roller 12, and the brake pads of the drum brake are in frictional sliding connection with the inner wall of the test roller 12.

[0053] In the embodiments of the present application, a drum brake fixed to the roller bracket 14 is provided in the cavity of the test roller 12. The drum brake can adjust the adhesion coefficient when the wheels of the vehicle under test 30 come into contact and friction with the test roller 12. The greater the contact friction force between the drum brake and the test roller 12, the greater the adhesion coefficient when the wheels of the vehicle under test 30 come into contact and friction with the test roller 12.

[0054] In some alternative embodiments: Refer to Figure 1 and Figure 2 As shown, the embodiments of the present application provide an off-road road device for vehicle road tests. The plurality of lifting mechanisms 13 of the off-road road device are all hydraulic cylinders. The cylinder body of the hydraulic cylinder is connected to a hydraulic pump (not shown in the figure) through a hydraulic valve (not shown in the figure), and the hydraulic valve is connected to a controller (not shown in the figure). The controller controls the extension length of each hydraulic cylinder through the hydraulic valve.

[0055] In some alternative embodiments: Refer to Figure 3As shown in the figure, an off-road road device for vehicle road tests provided by an embodiment of the present application further includes a vehicle cleaning mechanism 20, which is arranged on the off-road road 40 and is located upstream of the variable road surface mechanism 10. The vehicle cleaning mechanism 20 includes a water storage tank 21 in an inverted trapezoidal structure. A water spraying mechanism 22 is provided on one side of the water storage tank 21, and a gas jetting mechanism 23 is provided on one side of the water storage tank 21.

[0056] A laser pair sensor of the vehicle to be tested (not shown in the figure) is provided on one side of the water storage tank 21. The laser pair sensor is connected to a controller, and the controller is used to control the water spraying mechanism 22 to spray a water column onto the chassis of the vehicle. The controller is also used to control the gas jetting mechanism 23 to spray compressed gas onto the chassis of the vehicle.

[0057] When the vehicle 30 to be tested has completed one lap of the off-road road or the test is completed, it can be cleaned by the vehicle cleaning mechanism 20. When the pair sensor recognizes that the vehicle 30 to be tested enters this area, the water spraying mechanism 22 adjusts the spraying angle according to the area where the outer dimension of the vehicle is located and sprays a high-pressure water column.

[0058] When the vehicle 30 to be tested passes through the middle of the area, the water level height of the water storage tank 21 is adjusted to clean the chassis components of the vehicle. When the pair sensor recognizes that the vehicle 30 to be tested is about to drive out of the vehicle cleaning mechanism 20, the gas jetting mechanism 23 sprays high-pressure gas to quickly remove the residual water in the relevant parts.

[0059] In some alternative embodiments: Refer to Figure 1 As shown in the figure, an off-road road device for vehicle road tests provided by an embodiment of the present application, both ends of each of the test rollers of the off-road road device are connected to the roller bracket through universal hinge shafts. There are two sets of jacking mechanisms 13 between each roller bracket 14 and the installation frame 11, and the two sets of jacking mechanisms 13 jack up both ends of the test roller 12 with the same or different extended lengths.

[0060] In the embodiment of the present application, there are two sets of jacking mechanisms 13 between each roller bracket 14 and the installation frame 11. When it is necessary to adjust the heights of both ends of the test roller 12 to be the same, the two sets of jacking mechanisms 13 extend the same height. When it is necessary to adjust the heights of both ends of the test roller 12 to be different, the two sets of jacking mechanisms 13 extend different heights, so that the test roller 12 is in an inclined state to truly simulate a bumpy off-road road surface.

[0061] Refer to Figures 1 to 3 As shown in the figure, a second aspect of the embodiment of the present application provides a test method for an off-road road device for vehicle road tests. The method uses the off-road road device for vehicle road tests described in any of the above embodiments. The method includes:

[0062] S101. Adjust the lifting height of each test roller 12 through the lifting mechanism 13 according to the test conditions of the off-road road for the vehicle 30 to be tested, so that a bumpy road surface is formed jointly by multiple test rollers 12.

[0063] S102. Drive the vehicle 30 to be tested onto the off-road road 40 and drive it in a circle. Start recording the road test data when the vehicle 30 to be tested drives onto the bumpy road surface formed jointly by each test roller 12.

[0064] S103. According to the road test data, adjust the lifting height of each test roller 12 up or down again through the lifting mechanism 13, and adjust the distance between two adjacent installation racks 11.

[0065] S104. Drive the vehicle 30 to be tested onto the off-road road 40 and drive it in a circle again. Start recording the road test data again when the vehicle 30 to be tested drives onto the bumpy road surface formed jointly by each test roller 12.

[0066] S105. According to the road test data, adjust the tilt angle of each test roller 12 again through the lifting mechanism 13.

[0067] S106. Drive the vehicle 30 to be tested onto the off-road road 40 and drive it in a circle again. Start recording the road test data again when the vehicle 30 to be tested drives onto the bumpy road surface formed jointly by each test roller 12.

[0068] S107. During or after the test of the vehicle 30 to be tested, drive the vehicle 30 to be tested into the water storage tank 21 and use the water spraying mechanism 22 and the air jetting mechanism 23 to clean the chassis of the vehicle 30 to be tested.

[0069] Working principle

[0070] The embodiment of the present application provides an off-road road device and a test method for vehicle road tests. Since the off-road road device for vehicle road tests of the present application is provided with an installation rack 11, there are multiple rows of the installation rack 11, and each row of the installation rack 11 extends along the width direction of the off-road road 40, and multiple rows of the installation rack 11 are arranged at intervals in sequence along the length direction of the off-road road 40; test rollers 12, there are multiple test rollers 12, and the multiple test rollers 12 are rotatably connected to each installation rack 11 through roller brackets 14, and the multiple test rollers 12 on each installation rack 11 are arranged at intervals coaxially; a lifting mechanism 13, there are multiple lifting mechanisms 13, and the multiple lifting mechanisms 13 are respectively located between the roller brackets 14 and the installation rack 11 to vertically adjust the support height of each test roller 12, and the roller bracket 14 is vertically slidably connected to the installation rack 11.

[0071] Therefore, in the off-road road device for vehicle road tests of the present application, multiple rows of mounting racks 11 are provided on the off-road road 40. Each row of mounting racks 11 extends along the width direction of the off-road road 40, and the multiple rows of mounting racks 11 are arranged at intervals in sequence along the length direction of the off-road road 40. Test rollers 12 are rotatably connected to each row of mounting racks 11 through roller brackets 14. A jacking mechanism 13 for vertically adjusting the support height of each test roller 12 is provided between the roller brackets 14 and the mounting racks 11. Each jacking mechanism 13 adjusts the support height of each test roller 12 by adjusting its own telescopic length, thereby forming a variable road surface mechanism 10 with a set bumpy road condition. The bumpy road condition of the variable road surface mechanism 10 can be freely adjusted according to test requirements, improving the flexibility of off-road road tests and reducing construction costs.

[0072] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. Unless otherwise clearly specified and defined, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0073] It should be noted that in the present application, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0074] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An off-road road device for vehicle road tests, characterized in that Comprising: A variable road surface mechanism (10), the variable road surface mechanism (10) comprising: A mounting frame (11), the mounting frame (11) being provided with multiple rows, each row of the mounting frame (11) extending along the width direction of the off-road road (40), and the multiple rows of the mounting frame (11) being arranged at intervals in sequence along the length direction of the off-road road (40); Test rollers (12), there being a plurality of the test rollers (12), the plurality of test rollers (12) being rotatably connected to each of the mounting frames (11) through roller brackets (14), and the plurality of test rollers (12) on each mounting frame (11) being arranged coaxially at intervals; Lifting mechanisms (13), there being a plurality of the lifting mechanisms (13), the plurality of lifting mechanisms (13) being respectively located between the roller brackets (14) and the mounting frame (11) to vertically adjust the support height of each test roller (12), and the roller brackets (14) being vertically slidably connected to the mounting frame (11).

2. The off-road road device for vehicle road tests according to claim 1, characterized in that: The bottoms of the multiple mounting frames (11) are provided with multiple longitudinal slide rails (16) extending along the length direction of the off-road road (40), and the multiple longitudinal slide rails (16) are parallel to each other and arranged at intervals along the width direction of the off-road road (40); The multiple mounting frames (11) are slidably connected to the multiple longitudinal slide rails (16), and a telescopic mechanism (15) is connected between two adjacent mounting frames (11), and the telescopic mechanism (15) is used to adjust the distance between two adjacent mounting frames (11).

3. The off-road road device for vehicle road tests according to claim 1, characterized in that: The test roller (12) comprises an outer layer drum, and a motor stator fixedly located inside the outer layer drum, a motor rotor fixedly connected to the roller bracket (14) being arranged inside the motor stator, and the motor stator being connected to a controller for adjusting the driving torque.

4. The off-road road device for vehicle road tests according to claim 3, characterized in that: The motor stator of each test roller (12) is connected to an energy storage battery, and anti-slip ribs are welded on the outer layer drum or a rubber anti-slip layer is wrapped on the outer layer drum.

5. The off-road road device for vehicle road tests according to claim 1, characterized in that: An annular cavity is provided on the inner wall of the test roller (12), and a drum brake fixed to the roller bracket (14) is arranged inside the cavity of the test roller, and the drum brake is used to control the rotational resistance of the test roller (12), and the brake pads of the drum brake are in frictional sliding connection with the inner wall of the test roller (12).

6. The off-road road device for vehicle road tests according to claim 1, characterized in that: The multiple lifting mechanisms (13) are all hydraulic cylinders, the cylinder body of the hydraulic cylinder is connected to a hydraulic pump through a hydraulic valve, the hydraulic valve is connected to a controller, and the controller controls the extension length of each hydraulic cylinder through the hydraulic valve.

7. An off-road road device for vehicle road tests according to claim 1, characterized in that: It further includes a vehicle cleaning mechanism (20), the vehicle cleaning mechanism (20) is arranged on the off-road road (40) and upstream of the variable road surface mechanism (10), the vehicle cleaning mechanism (20) includes a water storage tank (21) in an inverted trapezoidal structure, one side of the water storage tank (21) is provided with a water spraying mechanism (22), and one side of the water storage tank (21) is provided with a gas jetting mechanism (23).

8. An off-road road device for vehicle road tests according to claim 7, characterized in that: One side of the water storage tank (21) is provided with a laser pair sensor for the vehicle under test (30), the laser pair sensor is connected to a controller, the controller is used to control the water spraying mechanism (22) to spray a water column on the chassis of the vehicle, and the controller is also used to control the gas jetting mechanism (23) to spray compressed gas on the chassis of the vehicle.

9. An off-road road device for vehicle road tests according to claim 1, characterized in that: Both ends of each test roller (12) are connected to the roller bracket (14) through a universal hinge shaft, and two sets of lifting mechanisms (13) are provided between each roller bracket (14) and the installation frame (11), and the two sets of lifting mechanisms (13) lift both ends of the test roller (12) with the same or different extended lengths.

10. A test method for an off-road road device used in vehicle road tests, characterized in that, The method uses the off-road road device for vehicle road tests according to any one of claims 1 to 9, and the method includes: According to the test conditions of the off-road road for the vehicle under test (30), adjust the lifting height of each test roller (12) through the lifting mechanism (13) so that a bumpy road surface is jointly formed by multiple test rollers (12); Drive the vehicle under test (30) onto the off-road road (40) and drive in a circle. When the vehicle under test (30) drives onto the bumpy road surface jointly formed by each test roller (12), start recording road test data; According to the road test data, adjust the lifting height of each test roller (12) up or down again through the lifting mechanism (13), and adjust the distance between two adjacent installation frames (11); Drive the vehicle under test (30) onto the off-road road (40) and drive in a circle again. When the vehicle under test (30) drives onto the bumpy road surface jointly formed by each test roller (12), record the road test data again; According to the road test data, adjust the tilt angle of each test roller (12) again through the lifting mechanism (13); Drive the vehicle under test (30) onto the off-road road (40) and drive in a circle again. When the vehicle under test (30) drives onto the bumpy road surface jointly formed by each test roller (12), record the road test data again; During or after the test of the vehicle under test (30), drive the vehicle under test (30) into the water storage tank (21) and use the water spraying mechanism (22) and the gas jetting mechanism (23) to clean the chassis of the vehicle under test (30).

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