Multipurpose vehicle test ramp and vehicle test method

Abstract

The invention relates to the technical field of vehicle testing, in particular to a multipurpose vehicle testing ramp and a vehicle testing method. The ramp objective table is provided with a slope surface for vehicles to pass through, and the slope surface is provided with at least one mounting pit; the number of the tire parking assemblies corresponds to that of the mounting pits, the tire parking assemblies are used for being detachably mounted in the mounting pits, the tire parking assemblies are used for making contact with tires of the vehicle and applying resistance to the tires, and the tire parking assemblies can adjust the resistance applied to the tires. According to the test ramp, the tire parking assembly with variable resistance is arranged on the slope surface of the ramp objective table, so that the test ramp can effectively simulate ramp road surfaces with different angles and different friction coefficients, and various limit test experiments related to ramp angles can be carried out.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle testing, and in particular to a multi-purpose vehicle test ramp and a vehicle testing method. Background Art

[0002] In automobile production, the test of the starting and parking brake capabilities of the automobile is indispensable, and the starting and stopping test of the automobile on a sloped road is also a necessary test content. At present, the starting and stopping test of the automobile on a sloped road is completed using a test ramp. In the field of vehicle testing, there are multiple test scenarios that require slopes of different angles to achieve vehicle performance testing, such as stopping on a slope, starting on a slope, jumping over a slope, and extreme touchdown.

[0003] In the related art, tests for different slopes are all met by building special standard ramps or welding fixed-angle steel ramps. After the construction of these two methods is completed, the ramp angle and the friction coefficient of the ramp road surface are both immutable, but the current test requirements for the ramp angle, the height of the top of the slope from the horizontal ground, and the adhesion coefficient of the ramp road surface are diverse, so it is impossible to meet all test requirements. In addition, the fixed ramp angle and ramp road surface friction coefficient can only be used for vehicle performance verification, and cannot test the vehicle's extreme performance. If test ramps with different ramp angles and different friction coefficients are built according to test requirements, the test cost will increase significantly and the utilization rate of the facilities will be low. Summary of the invention

[0004] Regarding the relevant technology, building test ramps with different ramp angles and different friction coefficients to meet different testing requirements will significantly increase the testing cost and lead to the problem of low facility utilization.

[0005] In a first aspect, an embodiment of the present application provides a multi-purpose vehicle test ramp, which includes:

[0006] A ramp loading platform, on which a slope is provided for vehicles to pass, and the slope is provided with at least one installation pit;

[0007] At least one tire parking assembly, the number of the tire parking assemblies corresponds to the number of the mounting pits, the tire parking assembly is used to be detachably mounted in the mounting pit, the tire parking assembly is used to contact with the tire of the vehicle and apply resistance to the tire, and the tire parking assembly can adjust the resistance it applies to the tire.

[0008] In combination with the first aspect, in one embodiment, the tire parking assembly includes:

[0009] A roller, which is installed in the installation pit;

[0010] A roller chain plate is wound around the roller, the roller chain plate is flush with the edge of the installation pit, and the roller chain plate is used to contact the tire of the vehicle and roll around the roller under the friction force of the tire.

[0011] In combination with the first aspect, in one embodiment, an adjusting portion is provided on the roller, and the adjusting portion is used to adjust the rotation preload force of the roller to change the critical tangential force required to rotate the roller.

[0012] In combination with the first aspect, in one embodiment, the tire parking assembly includes: a plurality of parking panels, the plurality of parking panels have different surface friction coefficients, and each of the parking panels can be detachably installed in one of the installation pits.

[0013] In combination with the first aspect, in one embodiment, a main support telescopic assembly is provided on the ramp platform, and the front end of the ramp platform is supported on the bottom surface through the main support telescopic assembly. The telescopic portion of the main support telescopic assembly can change the distance between the front end of the ramp platform and the bottom surface by telescoping to adjust the angle between the slope and the bottom surface.

[0014] In combination with the first aspect, in one embodiment, the main support telescopic assembly includes:

[0015] At least two first screw lifts are symmetrically arranged on both sides of the ramp platform, and the two first screw lifts are connected by a first connecting worm;

[0016] A driving motor is connected to the driving motor, and the driving motor drives the two first screw lifts to rise or fall synchronously through the rotation of the first connecting worm.

[0017] In combination with the first aspect, in one embodiment, two second screw lifts are provided between the front end and the rear end of the ramp loading platform, and the two second screw lifts are connected by a second connecting worm gear. A rotating handle is provided on the second connecting worm gear, and the rotating handle is used to drive the second connecting worm gear to rotate and drive the second connecting worm gear to rise or fall, so as to level the ramp loading platform.

[0018] In combination with the first aspect, in one embodiment, a road surface connecting plate is provided at the rear end of the ramp loading platform, and the road surface connecting plate is hinged to the rear end of the ramp loading platform.

[0019] In combination with the first aspect, in one implementation, a ramp angle sensor and a slope top height sensor are provided on the slope surface of the ramp loading platform.

[0020] In a second aspect, an embodiment of the present application provides a vehicle testing method using the above-mentioned multi-purpose vehicle test ramp, which comprises:

[0021] Place the ramp stage on a flat bottom surface;

[0022] Install the tire parking assembly on the slope of the ramp platform according to preset requirements;

[0023] Driving the vehicle onto the slope of the ramp loading platform and parking the tires of the vehicle on the corresponding tire parking assemblies;

[0024] Drive the vehicle on a slope to test the engagement.

[0025] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0026] The present application arranges a tire parking assembly with variable resistance on the slope surface of the ramp loading platform, so that the test ramp can effectively simulate slope road surfaces with different angles and different friction coefficients, thereby being able to carry out various extreme test experiments related to the ramp angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic diagram of the structure of a multi-purpose vehicle test ramp in an embodiment of the present application;

[0029] Figure 2 This is a structural schematic diagram of a tire parking assembly in the first embodiment of the present application;

[0030] Figure 3 This is a schematic structural diagram of a tire parking assembly in the second embodiment of the present application.

[0031] In the figure: 1. ramp loading platform; 11. slope; 12. installation pit; 2. tire parking assembly; 21. roller; 22. roller chain plate; 23. parking plate; 3. main support telescopic assembly; 31. first screw lift; 32. drive motor; 33. first connecting worm; 41. second screw lift; 42. second connecting worm; 43. rotating handle; 5. ramp angle sensor; 6. road surface connecting plate; 7. slope top height sensor. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] Regarding the relevant technology, building test ramps with different ramp angles and different friction coefficients to meet different testing requirements will significantly increase the testing cost and lead to the problem of low facility utilization.

[0034] In a first aspect, the present application provides an embodiment in which Figure 1 As shown, the multi-purpose vehicle test ramp includes: a ramp loading platform 1 and at least one tire parking assembly 2; wherein,

[0035] A ramp loading platform 1 is provided with a slope 11 for vehicles to pass through, and the slope 11 is provided with at least one installation pit 12; at least one tire parking assembly 2, the number of the tire parking assemblies 2 corresponds to the number of the installation pits 12, the tire parking assembly 2 is used to be detachably installed in the installation pit 12, the tire parking assembly 2 is used to contact with the tire of the vehicle and apply resistance to the tire, and the tire parking assembly 2 can adjust the resistance it applies to the tire.

[0036] It should be noted that there are many items in the ramp test of the vehicle, such as: the vehicle's extreme slope holding angle measurement test, the vehicle's extreme slope starting angle measurement test and other different items. In addition to adjusting the slope of the ramp platform 11 (i.e. the angle between the slope and the bottom plane), these items also need to be tested under different friction coefficients or resistances. Such as measuring the extreme slope holding angle or the extreme slope starting angle. Furthermore, in the present application, the tire parking assembly 2 adjusts the amount of resistance it can apply, thereby adjusting the different friction coefficients of the slope 11, thereby providing a test platform for different vehicle test items.

[0037] Preferably, if Figure 1 As shown, four installation pits 12 are arranged on the slope 11 , and a tire parking assembly 2 is arranged in each installation pit 12 .

[0038] It can be understood that each tire parking assembly 2 corresponds to a tire of the vehicle.

[0039] In the first optional embodiment provided by the present application, Figure 2 As shown, the tire parking assembly 2 includes: a roller 21 and a roller chain plate 22; wherein,

[0040] A roller 21 is installed in the installation pit 12; a roller chain plate 22 is wound around the roller 21, the roller chain plate 22 is flush with the edge of the installation pit 12, and the roller chain plate 22 is used to contact the tire of the vehicle and roll around the roller 21 under the friction force of the tire.

[0041] Furthermore, two rollers 21 are provided at both ends of the roller chain plate 22 . The roller chain plate 22 can rotate around the two rollers 21 under the drive of an external force, and at the same time drive the rollers 21 to rotate.

[0042] Preferably, the roller chain plate 22 is flush with the edge of the installation pit 12 .

[0043] It should be noted that in the above embodiment, after the vehicle enters the slope 11, the tire is parked on the roller chain plate 22 of the tire parking assembly 2, and then the vehicle is started or other tests are performed. After the vehicle is started, the tire will apply friction to the roller chain plate 22, thereby driving the roller chain plate 22 to rotate around the roller 21, and at the same time, the roller chain plate 22 applies an opposite force to the tire to drive the tire forward.

[0044] Specifically, an adjusting portion is provided on the roller 21 of the roller chain plate 22 , and the adjusting portion is used to adjust the rotation preload force of the roller 21 to change the critical tangential force required for the roller 21 to rotate.

[0045] It is understandable that the winding movement of the roller chain plate 22 needs to drive the roller 21 to rotate. Therefore, by adjusting the rotation preload of the roller 21, the critical tangential force for the roller to rotate can be adjusted. In this way, the roller chain plate 22 can simulate the adhesion of the vehicle on the road surface with different friction coefficients, thereby indirectly achieving the change of the friction coefficient of the slope road surface.

[0046] In the second embodiment provided by the present application, Figure 3 As shown, the tire parking assembly 2 includes: a plurality of parking panels 23, the surface friction coefficients of the plurality of parking panels 23 are different, and each parking panel 23 can be detachably installed in one of the installation pits 12. The parking panel 23 is fixed in the installation pit 12 by screws.

[0047] It is worth noting that the friction coefficients of the parking panels 23 in each set of tire parking assemblies 2 are different. Each time in use, only one parking panel 23 is installed in the corresponding installation pit 12. By replacing the parking panels 23 of tires with different friction coefficients, the friction coefficient of the slope surface 11 of the ramp loading platform 1 is changed.

[0048] In some optional embodiments, the ramp platform 1 is provided with a main support telescopic assembly 3, and the front end of the ramp platform 1 is supported on the bottom surface through the main support telescopic assembly 3. The telescopic part of the main support telescopic assembly 3 can change the distance between the front end of the ramp platform 1 and the bottom surface by telescoping to adjust the angle between the slope 11 and the bottom surface.

[0049] It is understandable that the main support telescopic assembly 3 can be used to adjust the slope to meet different test requirements.

[0050] Specifically, the main support telescopic assembly 3 includes: at least two first screw lifts 31 and a drive motor 32; wherein,

[0051] At least two first screw lifts 31 are symmetrically arranged on both sides of the ramp platform 1, and the two first screw lifts 31 are connected by a first connecting worm 33; a drive motor 32 is connected to the drive motor 32, and the drive motor 32 drives the two first screw lifts 31 to rise or fall synchronously through the rotation of the first connecting worm 33.

[0052] It is worth noting that the two first screw lifts 31 are arranged on the left and right sides of the ramp platform 1, and the two share a first connecting worm 33, which can achieve consistency in the stroke adjustment of the left and right screw lifts. The screw of the first screw lift 31 serves as a supporting device at one end of the front end (i.e., the top of the slope) of the ramp platform 1. The entire device has two screws on each side to improve the stability and supporting capacity of the ramp platform. The drive motor 32 is a power providing device, and the drive motor shaft is connected to the shared first connecting worm 33. The rotation of the drive motor 32 drives the worm shared by the two first screw lifts 31 to rotate together, changing the height of the first screw lift 31, thereby changing the angle of the ramp platform 1.

[0053] In some preferred embodiments, two second screw lifts 41 are provided between the front end and the rear end of the ramp platform 1, and the two second screw lifts 41 are connected by a second connecting worm 42. A rotating handle 43 is provided on the second connecting worm 42, and the rotating handle 43 is used to drive the second connecting worm 42 to rotate and drive the second connecting worm 42 to rise or fall, so as to level the ramp platform 1.

[0054] It can be understood that the rotating handle 43 is connected to the second connecting worm 42 shared by the two second screw lifts 41. After the angle or height of the ramp platform 1 is adjusted to the right position, the second connecting worm 42 is rotated by rotating the handle 43, thereby making the screws of the two second screw lifts 41 fall to the ground, so as to improve the support capacity and stability of the entire test ramp.

[0055] Preferably, a road surface connecting plate 6 is provided at the rear end (i.e., the bottom of the slope) of the ramp loading platform 1 , and the road surface connecting plate 6 is hinged to the rear end of the ramp loading platform 1 .

[0056] It is worth noting that in order to ensure that the ramp platform 1 and the ground can be smoothly connected after the ramp platform angle is changed, so as to facilitate vehicles to drive onto the ramp platform 1, the road surface connecting plate 6 is hinged to facilitate its adjustment.

[0057] In some preferred embodiments, a ramp angle sensor 5 and a slope top height sensor 7 are provided on the slope surface of the ramp loading platform 1 .

[0058] It should be noted that a slope top height sensor 7 is arranged at the top of the ramp platform, and a displacement sensor can be selected to check the slope top height information in real time. A ramp angle sensor 5 is arranged at the center of the ramp platform to check the ramp angle information in real time.

[0059] In a second aspect, the present application provides a vehicle testing method using the multi-purpose vehicle test ramp in the above embodiment, comprising:

[0060] Step S1, placing the ramp stage 1 on a flat bottom surface.

[0061] It is understandable that in order to obtain accurate test results, a suitable bottom plane needs to be selected as the bottom surface for testing.

[0062] Step S2, installing the tire parking assembly 2 on the slope 11 of the ramp loading platform 1 according to preset requirements;

[0063] In the first embodiment, the step S2 can be combined with the roller 21 and roller chain plate 22 structure in the first embodiment of the tire parking assembly 2. The operator can use the adjustment part to set the preload force of the roller 21 to meet different resistance requirements.

[0064] In the first embodiment, the above step S2 can be combined with the parking plate 23 structure in the second embodiment of the tire parking assembly 2. The operator can replace different parking plates 23 according to the friction coefficient requirements.

[0065] Step S3 , driving the vehicle onto the slope 11 of the ramp loading platform 1 , and parking the tires of the vehicle on the corresponding tire parking assemblies 2 .

[0066] Step S4: driving the vehicle on a slope to perform a test.

[0067] Furthermore, the present application provides the following specific implementation cases for a vehicle testing method for a multi-purpose vehicle test ramp:

[0068] Case 1: Misuse test of a vehicle driving onto the top of a ramp and jumping: Place the ramp platform 1 on a horizontal road surface, replace the tire parking plate 23 with a conventional friction coefficient parking plate, adjust the height of the top of the ramp platform 1 from the ground to the test required height through the main support telescopic assembly 3, and accelerate the vehicle on the ground from the road surface connecting plate 6 to the ramp platform 1 of this device, jump from the top of the slope and land. This device is used to reproduce or simulate the working condition of a vehicle speeding onto a slope and then jumping from the top of the slope in the test.

[0069] Case 2: Test for measuring the vehicle's extreme slope-holding angle: Place the ramp platform 1 on a horizontal road surface, replace the tire parking plate 23 with a conventional friction coefficient parking plate, and park the four wheels of the vehicle in the corresponding parking plate area. Start the drive motor 32 to drive the first connecting worm 33 to rotate, so that the first screw lift 31 is lifted together, thereby gradually increasing the angle of the ramp platform until the vehicle begins to slide. Since the screw and worm are used for connection, the angle of the ramp platform is continuously variable, so the vehicle's extreme slope-holding angle can be accurately measured. And the parking plates 23 with different friction coefficients can be replaced, so that the vehicle's extreme slope-holding angle on roads with different friction coefficients can be measured.

[0070] Case 3: Vehicle limit ramp starting angle measurement test: Similar to the vehicle limit hill-holding angle measurement test, the angle of the ramp platform 1 can be adjusted in steps of 1° or less, and the parking panels 23 with different friction coefficients can be replaced. After the vehicle is parked on the ramp, a vehicle starting test is performed, so that the vehicle's limit ramp starting angle on roads with different friction coefficients can be measured.

[0071] Case 4 Vehicle extreme grounding test: Place the device on a horizontal road surface, replace the tire parking plate 23 with a parking plate 23 with a conventional friction coefficient, adjust the angle of the ramp platform 1 to the test required angle, accelerate the vehicle on the ground from the road connecting plate 6 onto the ramp platform 1 of the device, and observe whether there are scratches on the front side of the vehicle and the ramp, so as to verify whether the vehicle's passability meets the requirements.

[0072] Case 5: Vehicle fuel level display measurement test: Place the ramp platform 1 on a horizontal road surface, replace the tire parking plate 23 with a conventional friction coefficient parking plate, adjust the angle of the ramp platform 1 to the test required angle, and drive the vehicle onto the platform to measure whether the fuel level display of the vehicle is accurate when on ramps at different angles.

[0073] In summary, the present application sets a tire parking assembly with variable resistance on the slope of the ramp platform, so that the test ramp can effectively simulate slope road surfaces with different angles and different friction coefficients, so that various extreme test experiments related to ramp angles can be carried out.

[0074] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "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 or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the 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 the specific circumstances.

[0075] It should be noted that, in this application, relational 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 such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0076] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent 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 the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A multi-purpose vehicle test ramp, characterized in that: include: A ramp loading platform (1) is provided with a slope surface (11) for vehicles to pass through, and the slope surface (11) is provided with at least one installation pit (12); At least one tire parking assembly (2), the number of the tire parking assemblies (2) corresponding to the number of the installation pits (12), the tire parking assembly (2) being used to be detachably installed in the installation pit (12), the tire parking assembly (2) being used to contact with a tire of a vehicle and apply resistance to the tire, and the tire parking assembly (2) being able to adjust the magnitude of the resistance applied to the tire.

2. The multi-purpose vehicle test ramp according to claim 1, characterized in that: The tire parking assembly (2) comprises: A roller (21) installed in the installation pit (12); A roller chain plate (22) is wound around the roller (21), the roller chain plate (22) is flush with the edge of the installation pit (12), and the roller chain plate (22) is used to contact the tire of the vehicle and roll around the roller (21) under the friction force of the tire.

3. The multi-purpose vehicle test ramp according to claim 2, characterized in that: The roller (21) is provided with an adjusting portion, and the adjusting portion is used to adjust the rotation preload force of the roller (21) so as to change the critical tangential force required for the roller (21) to rotate.

4. The multi-purpose vehicle test ramp according to claim 1, characterized in that: The tire parking assembly (2) comprises: a plurality of parking panels (23), the surface friction coefficients of the plurality of parking panels (23) being different, and each of the parking panels (23) being detachably mounted in one of the mounting pits (12).

5. The multi-purpose vehicle test ramp according to claim 1, characterized in that: The ramp platform (1) is provided with a main support telescopic assembly (3), the front end of the ramp platform (1) is supported on the bottom surface by the main support telescopic assembly (3), and the telescopic portion of the main support telescopic assembly (3) can change the distance between the front end of the ramp platform (1) and the bottom surface by telescoping, so as to adjust the angle between the ramp surface (11) and the bottom surface.

6. The multi-purpose vehicle test ramp according to claim 5, characterized in that: The main support telescopic assembly (3) comprises: At least two first screw lifts (31) are symmetrically arranged on both sides of the ramp platform (1), and the two first screw lifts (31) are connected via a first connecting worm (33); A driving motor (32) is connected to the driving motor (32), and the driving motor (32) drives the two first screw lifts (31) to rise or fall synchronously through the rotation of the first connecting worm (33).

7. The multi-purpose vehicle test ramp according to claim 6, characterized in that: Two second screw lifts (41) are provided between the front end and the rear end of the ramp loading platform (1), and the two second screw lifts (41) are connected via a second connecting worm (42). A rotating handle (43) is provided on the second connecting worm (42), and the rotating handle (43) is used to drive the second connecting worm (42) to rotate and drive the second connecting worm (42) to rise or fall, so as to level the ramp loading platform (1).

8. The multi-purpose vehicle test ramp according to claim 5, characterized in that: A road surface connection plate (6) is provided at the rear end of the ramp loading platform (1), and the road surface connection plate (6) is hinged to the rear end of the ramp loading platform (1).

9. The multi-purpose vehicle test ramp according to claim 1, characterized in that: A ramp angle sensor (5) and a slope top height sensor (7) are provided on the slope surface of the ramp loading platform (1).

10. A vehicle testing method using the multi-purpose vehicle test ramp as claimed in claim 1, characterized in that: include: Place the ramp stage (1) on a flat bottom surface; Installing a tire parking assembly (2) on the slope (11) of the ramp loading platform (1) according to preset requirements; Driving the vehicle onto the slope (11) of the ramp loading platform (1), and parking the tires of the vehicle on the corresponding tire parking components (2); The vehicle was driven on a slope for testing.

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