Vehicle ramp test device

Abstract

The application provides a vehicle climbing test device, and relates to the technical field of vehicle climbing test.The vehicle climbing test device comprises a base, a climbing platform, a first hydraulic cylinder, a second hydraulic cylinder and a hydraulic control unit, one end of the climbing platform is rotationally connected with the base along the length direction; the first hydraulic cylinder and the second hydraulic cylinder are both connected with the base and the climbing platform, the first hydraulic cylinder and the second hydraulic cylinder are arranged in the width direction of the climbing platform and are configured to adjust the inclination angle of the climbing platform; the hydraulic control unit is arranged on the base and is configured to control the synchronous extension and retraction of the first hydraulic cylinder and the second hydraulic cylinder.The vehicle climbing test device can ensure that the extension and retraction strokes of the first hydraulic cylinder and the second hydraulic cylinder are consistent when the first hydraulic cylinder and the second hydraulic cylinder are unevenly stressed, and can avoid the overturning of the vehicle on the climbing platform.

Description

Technical Field

[0001] This application relates to the field of vehicle hill-climbing test technology, and more particularly to a vehicle hill-climbing test device. Background Technology

[0002] Currently, one of the important indicators for evaluating the off-road capability of off-road vehicles is their maximum gradeability. According to the "Motor Vehicle Climbing Ability Test - GB / T 12539-2018 'Test Method for Steep Hill Climbing of Automobiles'" standard, considering vehicle safety when climbing slopes, tests are now conducted on actual slopes. Slopes are categorized as 30%, 40%, 50%, 60%, etc. With the advent of new energy off-road vehicles equipped with in-wheel motors, their power capabilities have been significantly improved. Therefore, evaluating the vehicle's maximum gradeability remains a crucial indicator for assessing vehicle performance.

[0003] In related technologies, when a vehicle hill-climbing test device is used, the vehicle is prone to tipping over because the two hydraulic cylinders lift asynchronously. Utility Model Content

[0004] In view of the above problems, this application provides a vehicle climbing test device, which can ensure that two hydraulic cylinders extend and retract synchronously through a hydraulic control unit, effectively preventing the climbing platform from tipping over during operation and improving work safety.

[0005] In a first aspect, according to an embodiment of the present application, the vehicle climbing test device includes a base, a climbing platform, a first hydraulic cylinder, a second hydraulic cylinder, and a hydraulic control unit. One end of the climbing platform along its length is rotatably connected to the base. The first hydraulic cylinder and the second hydraulic cylinder are both connected to the base and the climbing platform. The first hydraulic cylinder and the second hydraulic cylinder are spaced apart along the width direction of the climbing platform and are configured to adjust the tilt angle of the climbing platform. The hydraulic control unit is located on the base and is configured to control the synchronous extension and retraction of the first hydraulic cylinder and the second hydraulic cylinder.

[0006] According to the vehicle climbing test device of this application embodiment, when the forces on the first hydraulic cylinder and the second hydraulic cylinder are uneven, the hydraulic control unit can ensure that the extension and retraction strokes of the first hydraulic cylinder and the second hydraulic cylinder are consistent, thereby preventing the vehicle on the climbing platform from overturning.

[0007] In some embodiments, the hydraulic control unit includes an oil pump, a synchronous motor, and an oil tank. The synchronous motor has a first inlet, a first outlet, and a second outlet. The first inlet is connected to the oil pump, the first outlet is connected to a first hydraulic cylinder, and the second outlet is connected to a second hydraulic cylinder. The oil pump is configured to pump fluid oil from the oil tank to the synchronous motor.

[0008] In the above embodiment, during the operation of the vehicle climbing test device, the oil pump can pump the hydraulic oil in the oil tank to the synchronous motor. When the two hydraulic cylinders are subjected to uneven force, the synchronous motor can evenly distribute the hydraulic oil to the first hydraulic cylinder and the second hydraulic cylinder, ensuring that the first hydraulic cylinder and the second hydraulic cylinder can extend and retract synchronously.

[0009] In some embodiments, the hydraulic control unit further includes a control valve group, a first outlet being connected to a first hydraulic cylinder via the control valve group, and a second outlet being connected to a second hydraulic cylinder via the control valve group. The control valve group is configured to control the hydraulic difference between the first hydraulic cylinder and the second hydraulic cylinder within a preset range.

[0010] In the above embodiments, with the coordinated operation of the control valve group and the synchronous motor, the first hydraulic cylinder and the second hydraulic cylinder are ensured to extend and retract synchronously when the force is uneven, thereby improving the safety and accuracy of the test.

[0011] In some embodiments, the first liquid outlet is connected to the first hydraulic cylinder via a first delivery pipeline, and the second liquid outlet is connected to the second hydraulic cylinder via a second delivery pipeline. The control valve assembly includes a first relief valve and a second relief valve. The first relief valve is unidirectionally connected to the first delivery line and the second delivery line. The first relief valve is configured to allow fluid in the first delivery line to flow to the second delivery line. The second relief valve is unidirectionally connected to the first delivery line and the second delivery line. The second relief valve is configured to allow fluid in the second delivery line to flow to the first delivery line.

[0012] In the above embodiments, the cooperation of the first relief valve and the second relief valve can ensure that the hydraulic difference between the first hydraulic cylinder and the second hydraulic cylinder is controlled within a preset range, ensuring that the extension and retraction strokes of the two hydraulic cylinders are synchronized and preventing the vehicle from overturning.

[0013] In some embodiments, the hydraulic control unit further includes a first main pipeline, one end of which is connected to an oil pump and the other end of which is connected to a first inlet. The first main pipeline is provided with a check valve, which is configured to allow one-way flow from one end of the first main pipeline to the other end.

[0014] In the above embodiments, the hydraulic oil pumped by the oil pump can be prevented from flowing back to the oil pump, thus avoiding affecting the stable operation of the vehicle climbing test device.

[0015] In some embodiments, the hydraulic control unit further includes a first return line, one end of which is connected to a first main line and located downstream of a check valve, and the other end of which is connected to an oil tank. The first return line is equipped with a flow valve.

[0016] In the above embodiment, the vehicle hill-climbing test device can be stopped by the first return pipeline and the conduction valve.

[0017] In some embodiments, the hydraulic control unit further includes a second return line, one end of which is connected to the first main line and located downstream of the check valve, and the other end of which is connected to the oil tank. The second return line is equipped with a shut-off valve.

[0018] In the above embodiment, the second return pipeline and the shut-off valve can control the slow descent of the climbing platform, avoiding damage to the vehicle climbing test device and improving test safety.

[0019] In some embodiments, the vehicle hill-climbing test apparatus further includes a connecting sub-slope, which is disposed on the base and located at the end where the hill-climbing platform is rotatably connected to the base.

[0020] In the above embodiments, the connecting slope can connect the working face and the climbing platform, avoiding damage when the vehicle is lowered.

[0021] In some embodiments, the vehicle climbing test apparatus further includes a traction member located at the other end of the climbing platform along its length and used to pull the vehicle.

[0022] In the above embodiments, the vehicle can be pulled by the traction component, which prevents the vehicle from overturning directly when the test slope is large, thus improving the safety of the test.

[0023] In some embodiments, the vehicle climbing test device further includes a first support frame and a second support frame, which are respectively disposed on both sides of the climbing platform along the width direction. One end of the first hydraulic cylinder is rotatably connected to the base, and the other end is rotatably connected to the first support frame. The first support frame is rotatably connected to the first hydraulic cylinder, and the second support frame is rotatably connected to the second hydraulic cylinder.

[0024] In the above embodiments, the structural strength of the vehicle climbing test device can be improved by providing a first support frame and a second support frame.

[0025] In some embodiments, the connection point between the first support frame and the first hydraulic cylinder is located on the side of the climbing platform away from the base.

[0026] In the above embodiment, it can make way for the first hydraulic cylinder. When the climbing platform is adjusted to a horizontal state, due to the structure of the first hydraulic cylinder itself, it will extend out of the climbing platform to the side away from the base. The connection position between the first support frame and the first hydraulic cylinder is located on the side of the climbing platform away from the base, which can make way for the first hydraulic cylinder and avoid the first hydraulic cylinder from becoming horizontal when it retracts, which would make it difficult to apply force to the climbing platform when it extends.

[0027] In some embodiments, the connection point between the second support frame and the second hydraulic cylinder is located on the side of the climbing platform away from the base.

[0028] In the above embodiment, it can make way for the second hydraulic cylinder. When the climbing platform is adjusted to a horizontal state, due to the structure of the second hydraulic cylinder itself, it will extend out of the climbing platform to the side away from the base. The connection position of the second support frame and the second hydraulic cylinder is located at a point on the climbing platform away from the base, which can make way for the second hydraulic cylinder and prevent the second hydraulic cylinder from becoming horizontal when it retracts, making it difficult to apply force to the climbing platform when it extends.

[0029] Other features and advantages disclosed in this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described technology disclosed in this application.

[0030] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of a vehicle hill-climbing test apparatus according to some embodiments of this application.

[0032] Figure 2 yes Figure 1 Left view of the embodiment.

[0033] Figure 3 yes Figure 1 Front view of the embodiment.

[0034] Figure 4 This is a schematic diagram of a hydraulic control unit, a first hydraulic cylinder, and a second hydraulic cylinder in some embodiments of this application.

[0035] The reference numerals in the detailed embodiments are as follows: The vehicle climbing test device 100 includes a base 10, a climbing platform 20, a first hydraulic cylinder 30, a second hydraulic cylinder 40, a hydraulic control unit 50, an oil pump 51, a synchronous motor 52, an oil tank 53, a control valve group 54, a first overflow valve 541, a second overflow valve 542, a first delivery pipeline 55, a second delivery pipeline 56, a first main pipeline 57, a check valve 571, a first return pipeline 58, a conduction valve 581, a second return pipeline 59, a shut-off valve 591, a connecting secondary slope 60, a traction component 70, a first support frame 80, a second support frame 90, and components in the following directions: length AA, width BB, and thickness CC. Detailed Implementation

[0036] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0037] In related technologies, when a vehicle hill-climbing test device is used, the vehicle is prone to tipping over because the two hydraulic cylinders lift asynchronously.

[0038] Therefore, this application provides a vehicle hill-climbing test device 100, which can ensure that the two hydraulic cylinders extend and retract synchronously through the hydraulic control unit 50, effectively preventing the hill-climbing platform 20 from tipping over during operation and improving work safety.

[0039] like Figures 1 to 4 According to the embodiments of this application, the vehicle climbing test device 100 includes a base 10, a climbing platform 20, a first hydraulic cylinder 30, and a second hydraulic cylinder 40.

[0040] The base 10 is supported on the working surface to ensure stable placement of the vehicle climbing test device 100.

[0041] The climbing platform 20 has two opposite ends along its length. One end of the climbing platform 20 is rotatably connected to the base 10, and the other end rotates around the rotatable connection point.

[0042] The first hydraulic cylinder 30 and the second hydraulic cylinder 40 are both connected to the base 10 and the climbing platform 20. The first hydraulic cylinder 30 and the second hydraulic cylinder 40 are spaced apart along the width direction of the climbing platform 20 and are configured to adjust the tilt angle of the climbing platform 20. In this way, the vehicle can be parked on the climbing platform 20, and the tilt angle of the climbing platform 20 can be adjusted by the first hydraulic cylinder 30 and the second hydraulic cylinder 40 to test the vehicle's climbing performance. The spaced first hydraulic cylinder 30 and the second hydraulic cylinder 40 can apply force evenly to the climbing platform 20, improving the working stability of the testing device.

[0043] However, during operation, the pressure on the first hydraulic cylinder 30 and the second hydraulic cylinder 40 is uneven, resulting in different extension and retraction strokes of the first hydraulic cylinder 30 and the second hydraulic cylinder 40, which ultimately causes the vehicle on the climbing platform 20 to overturn.

[0044] Based on this, the vehicle climbing test device 100 of this application embodiment also includes a hydraulic control unit 50. The hydraulic control unit 50 is located on the base 10 and is configured to control the synchronous extension and retraction of the first hydraulic cylinder 30 and the second hydraulic cylinder 40. In this way, the hydraulic control unit 50 ensures that the extension and retraction strokes of the first hydraulic cylinder 30 and the second hydraulic cylinder 40 are the same even when the force is uneven, thereby preventing the vehicle on the climbing platform 20 from overturning and improving the accuracy of the vehicle climbing test.

[0045] In summary, according to the vehicle climbing test device 100 of this application embodiment, when the first hydraulic cylinder 30 and the second hydraulic cylinder 40 are subjected to uneven forces, the hydraulic control unit 50 can ensure that the extension and retraction strokes of the first hydraulic cylinder 30 and the second hydraulic cylinder 40 are consistent, thereby preventing the vehicle on the climbing platform 20 from overturning.

[0046] It should be understood that the aforementioned length direction can be understood as the length direction of the climbing platform 20, and the following width direction and thickness direction can be understood as the width direction and thickness direction of the climbing platform 20, respectively.

[0047] like Figure 4 In some embodiments of this application, the hydraulic control unit 50 includes an oil pump 51, a synchronous motor 52, and an oil tank 53.

[0048] Specifically, the synchronous motor 52 has a first inlet, a first outlet, and a second outlet. The first inlet is connected to the oil pump 51, the first outlet is connected to the first hydraulic cylinder 30, and the second outlet is connected to the second hydraulic cylinder 40. The oil pump 51 is configured to deliver hydraulic oil from the oil tank 53 to the synchronous motor 52. Thus, during the operation of the vehicle hill-climbing test device 100, the oil pump 51 can deliver hydraulic oil from the oil tank 53 to the synchronous motor 52. The synchronous motor 52 can evenly distribute hydraulic oil to the first hydraulic cylinder 30 and the second hydraulic cylinder 40 when the two hydraulic cylinders are subjected to uneven force, ensuring that the first hydraulic cylinder 30 and the second hydraulic cylinder 40 can extend and retract synchronously.

[0049] In addition, the hydraulic control unit 50 also includes a drive unit connected to the oil pump 51 to provide power to the oil pump 51, and an oil filter is connected between the oil pump 51 and the oil tank 53 to filter impurities in the hydraulic oil.

[0050] To further ensure that the extension and retraction strokes of the first hydraulic cylinder 30 and the second hydraulic cylinder 40 are the same.

[0051] like Figure 4In some embodiments of this application, the hydraulic control unit 50 further includes a control valve group 54. The first outlet is connected to the first hydraulic cylinder 30 through the control valve group 54, and the second outlet is connected to the second hydraulic cylinder 40 through the control valve group 54. The control valve group 54 is configured to control the hydraulic difference between the first hydraulic cylinder 30 and the second hydraulic cylinder 40 within a preset range. In this way, with the coordinated cooperation of the control valve group 54 and the synchronous motor 52, the first hydraulic cylinder 30 and the second hydraulic cylinder 40 are ensured to extend and retract synchronously when subjected to uneven force, thereby improving the safety and accuracy of the test.

[0052] For example, when the pressure on the first hydraulic cylinder 30 is greater than the pressure on the second hydraulic cylinder 40, the hydraulic pressure of the first hydraulic cylinder 30 is greater than that of the second hydraulic cylinder 40, and the hydraulic pressure difference between the first hydraulic cylinder 30 and the second hydraulic cylinder exceeds a preset range, resulting in different extension and retraction strokes of the first hydraulic cylinder 30 and the second hydraulic cylinder 40. In order to ensure that the first hydraulic cylinder 30 and the second hydraulic cylinder 40 extend and retract synchronously, the control valve group 54 can reduce the hydraulic pressure of the first hydraulic cylinder 30, so that the hydraulic pressure difference between the first hydraulic cylinder 30 and the second hydraulic cylinder 40 is controlled within a preset range.

[0053] Furthermore, such as Figure 4 In some embodiments of this application, the first liquid outlet is connected to the first hydraulic cylinder 30 through the first delivery pipeline 55, and the second liquid outlet is connected to the second hydraulic cylinder 40 through the second delivery pipeline 56. The control valve assembly 54 includes a first relief valve 541 and a second relief valve 542. The first relief valve 541 is unidirectionally connected to the first delivery line 55 and the second delivery line 56. The first relief valve 541 is configured to allow fluid in the first delivery line 55 to flow to the second delivery line 56. The second relief valve 542 is unidirectionally connected to the first delivery line 55 and the second delivery line 56. The second relief valve 542 is configured to allow fluid in the second delivery line 56 to flow to the first delivery line 55. Thus, through the cooperation of the first relief valve 541 and the second relief valve 542, the hydraulic pressure difference between the first hydraulic cylinder 30 and the second hydraulic cylinder 40 can be controlled within a preset range, ensuring that the extension and retraction strokes of the two hydraulic cylinders are synchronized and preventing the vehicle from overturning.

[0054] It should be explained that the first relief valve 541 releases pressure to the second delivery pipeline 56 when the hydraulic pressure in the first delivery pipeline 55 exceeds a first preset value, and the first preset value is determined based on the hydraulic pressure in the second delivery pipeline 56; the second relief valve 542 releases pressure to the first delivery pipeline 55 when the hydraulic pressure in the second delivery pipeline 56 exceeds a second preset value, and the second preset value is determined based on the hydraulic pressure in the first delivery pipeline 55. The hydraulic pressure of the first hydraulic cylinder 30 and the hydraulic pressure of the first delivery pipeline 55 can be considered the same, and the hydraulic pressure of the second hydraulic cylinder 40 and the hydraulic pressure of the second delivery pipeline 56 can be considered the same, with negligible error.

[0055] For ease of understanding, for example, when the pressure on the first hydraulic cylinder 30 is greater than the pressure on the second hydraulic cylinder 40, the first relief valve 541 opens, causing the first delivery line 55 to release pressure to the second delivery line 56 until the hydraulic pressure in the first delivery line 55 equals the hydraulic pressure in the second delivery line 56. Then the first relief valve 541 closes, so that the pressure difference between the first hydraulic cylinder 30 and the second hydraulic cylinder 40 is maintained within a preset range. In this way, the extension and retraction strokes of the first hydraulic cylinder 30 and the second hydraulic cylinder 40 are the same.

[0056] like Figure 4 In some embodiments of this application, the hydraulic control unit 50 further includes a first main pipeline 57, one end of which is connected to the oil pump 51 and the other end is connected to a first inlet. The first main pipeline 57 is provided with a one-way valve 571, which is configured to allow one-way flow from one end of the first main pipeline 57 to the other end. In this way, the hydraulic oil pumped by the oil pump 51 can be prevented from flowing back to the oil pump 51 and affecting the stable operation of the vehicle climbing test device 100.

[0057] like Figure 4 In some embodiments of this application, the hydraulic control unit 50 further includes a first return line 58, one end of which is connected to the first main line 57 and located downstream of the one-way valve 571, and the other end is connected to the oil tank 53; the first return line 58 is provided with a control valve 581, so that the vehicle climbing test device 100 can be stopped through the first return line 58 and the control valve 581.

[0058] For example, after the hill-climbing test is completed or when the test device is powered off, the control valve 581 can be opened. At this time, the first hydraulic cylinder 30 and the second hydraulic cylinder 40 contract under the heavy pressure of the vehicle and the hill-climbing platform 20, and the hydraulic oil can be forced back and flow back to the oil tank 53 from the first return line 58. During the hill-climbing test, the control valve 581 is closed to ensure the successful completion of the test.

[0059] like Figure 4 In some embodiments of this application, the hydraulic control unit 50 further includes a second return line 59. One end of the second return line 59 is connected to the first main line 57 and is located downstream of the one-way valve 571, and the other end is connected to the oil tank 53. The second return line 59 is provided with a shut-off valve 591. Thus, the climbing platform 20 can be controlled to descend slowly through the second return line 59 and the shut-off valve 591, so as to avoid damage to the vehicle climbing test device 100 and improve test safety.

[0060] For example, the vehicle hill-climbing test device 100 has multiple hydraulic pipes. When a hydraulic pipe is damaged and leaks oil, the shut-off valve 591 can be opened. The shut-off valve 591 can provide resistance to the hydraulic system, so that the hydraulic oil can slowly flow back to the oil tank 53 through the shut-off valve 591, thus preventing the hill-climbing platform 20 from falling rapidly and causing damage.

[0061] like Figures 1 to 3 In some embodiments of this application, the vehicle climbing test device 100 further includes a connecting secondary slope 60, which is disposed on the base 10 and located at the end where the climbing platform 20 is rotatably connected to the base 10; thus, the connecting secondary slope 60 can connect the working surface and the climbing platform 20, avoiding damage when the vehicle is lowered.

[0062] For example, in order to avoid structural interference between the ramp platform 20 and the working surface when it is tilted, the ramp platform 20 is set on the base 10 and has a predetermined distance from the working surface. In order for the vehicle to drive smoothly into the ramp platform 20, a connecting secondary ramp 60 can be provided on the base 10. The connecting secondary ramp 60 has a slope and can connect the ramp platform 20 and the working surface.

[0063] Furthermore, after the steep gradient test is completed, if the vehicle is directly lowered from the climbing platform 20 to the working surface, it will cause the vehicle to collide with the working surface. In this case, the connecting sub-slope 60 can be located at the end where the climbing platform 20 is rotatably connected to the base 10. In this way, the vehicle can first move from the climbing platform 20 to the connecting sub-slope 60, and then move from the connecting sub-slope 60 to the working surface. The connecting sub-slope 60 can adapt to the approach angle and departure angle of the vehicle, avoid vehicle damage, and improve test safety.

[0064] like Figures 1 to 3 In some embodiments of this application, the vehicle climbing test device 100 further includes a traction member 70, which is located at the other end of the climbing platform 20 along the length direction and is used to pull the vehicle; in this way, the vehicle can be pulled by the traction member 70, avoiding the vehicle from overturning directly when the test slope is large, thus improving the test safety.

[0065] Furthermore, the traction component 70 can also be used to test the vehicle's climbing performance. It can be understood that the traction component 70 is set at the other end of the climbing platform 20 along the length direction. This end rotates around the rotating end of the climbing platform 20 to adjust the tilt angle of the climbing platform 20. When the tilt angle of the climbing platform 20 reaches a certain value, the vehicle slips. At this time, the traction component 70 receives the pulling force of the vehicle, thereby testing the vehicle's climbing performance.

[0066] like Figures 1 to 3In some embodiments of this application, the vehicle climbing test device 100 further includes a first support frame 80 and a second support frame 90. The first support frame 80 and the second support frame 90 are respectively disposed on both sides of the climbing platform 20 along the width direction. One end of the first hydraulic cylinder 30 is rotatably connected to the base 10, and the other end is rotatably connected to the first support frame 80. The first support frame 80 is rotatably connected to the first hydraulic cylinder 30, and the second support frame 90 is rotatably connected to the second hydraulic cylinder 40. Thus, by providing the first support frame 80 and the second support frame 90, the structural strength of the vehicle climbing test device 100 can be improved. Specifically, when the first hydraulic cylinder 30 and the second hydraulic cylinder 40 drive the climbing platform 20, the first support frame 80 can disperse the driving force of the first hydraulic cylinder 30, and the second support frame 90 can disperse the driving force of the second hydraulic cylinder 40, thereby improving structural stability.

[0067] like Figures 1 to 3 In some embodiments of this application, the connection position between the first support frame 80 and the first hydraulic cylinder 30 is located on the side of the climbing platform 20 away from the base 10. This can make way for the first hydraulic cylinder 30. When the climbing platform 20 is adjusted to a horizontal state, due to its own structure, the first hydraulic cylinder 30 will extend out of the climbing platform 20 on the side away from the base 10. By placing the connection position between the first support frame 80 and the first hydraulic cylinder 30 on the side of the climbing platform 20 away from the base 10, the first hydraulic cylinder 30 can be made to make way for it. This also prevents the first hydraulic cylinder 30 from becoming horizontal when it retracts, which would make it difficult to apply force to the climbing platform 20 when it extends.

[0068] like Figures 1 to 3 In some embodiments of this application, the connection position between the second support frame 90 and the second hydraulic cylinder 40 is located on the side of the climbing platform 20 away from the base 10. This allows for the clearance of the second hydraulic rod. When the climbing platform 20 is adjusted to a horizontal state, the second hydraulic cylinder 40 will extend out of the climbing platform 20 away from the base 10 due to its own structure. By placing the connection position between the second support frame 90 and the second hydraulic cylinder 40 on the side of the climbing platform 20 away from the base 10, clearance can be made for the second hydraulic cylinder 40, and it can also prevent the second hydraulic cylinder 40 from becoming horizontal when it retracts, which would make it difficult to apply force to the climbing platform 20 when it extends.

[0069] like Figures 1 to 3In some embodiments of this application, both the first support frame 80 and the second support frame 90 include a first support portion, a second support portion, and a third support portion. The first support portion and the second support portion are spaced apart along the length direction. One end of the first support portion is connected to the climbing platform 20, and the other end is connected to the third support portion. One end of the second support portion is connected to the climbing platform 20, and the other end is connected to the third support portion. The third support portion is rotatably connected to the first hydraulic cylinder 30 or the second hydraulic cylinder 40. In this way, the structural stability of the vehicle climbing test device 100 can be improved, thereby improving the test safety.

[0070] Understandably, taking the first support frame 80 as an example, the first support frame 80 includes a first support part, a second support part, and a third support part. The first support part and the second support part are spaced apart along the length direction, and the third support part connects the first support part and the second support part. The first support part and the second support part are connected to the climbing platform 20. In this way, the first support frame 80 can form a frame structure. The third support part is rotatably connected to the first hydraulic cylinder 30. In this way, the force applied by the first hydraulic cylinder 30 can be distributed to each support part, avoiding stress on a single position, improving structural strength, and thus improving the stability of the vehicle climbing test device 100.

[0071] like Figures 1 to 3 In some embodiments of this application, the climbing platform 20 has a first surface and a second surface opposite each other along the thickness direction. The first surface is used to support the vehicle, and the distance between the first support portion and the second support portion in the length direction gradually decreases along the direction from the second surface to the first surface. This further improves the structural stability of the vehicle climbing test device 100, thereby enhancing test safety.

[0072] It is understood that the distance between the first support and the second support in the length direction gradually decreases along the direction from the second surface to the first surface, and the third support connects the first support and the second support, so that the first support frame 80 or the second support frame 90 forms a triangular structure, in order to further improve the structural stability of the vehicle climbing test device 100 and ensure the safe conduct of the test.

[0073] In this application, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0074] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0075] In all embodiments of this application, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0076] It should be understood that the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0077] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0078] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A vehicle hill-climbing test device, characterized in that, include: Base (10); The ramp platform (20) is rotatably connected to the base (10) at one end along its length. The first hydraulic cylinder (30) and the second hydraulic cylinder (40) are both connected to the base (10) and the climbing platform (20). The first hydraulic cylinder (30) and the second hydraulic cylinder (40) are spaced apart along the width direction of the climbing platform (20) and are configured to adjust the tilt angle of the climbing platform (20). A hydraulic control unit (50) is located on the base (10) and configured to control the synchronous extension and retraction of the first hydraulic cylinder (30) and the second hydraulic cylinder (40).

2. The vehicle hill-climbing test device according to claim 1, characterized in that, The hydraulic control unit (50) includes an oil pump (51), a synchronous motor (52), and an oil tank (53). The synchronous motor (52) has a first inlet, a first outlet, and a second outlet. The first inlet is connected to the oil pump (51), the first outlet is connected to the first hydraulic cylinder (30), and the second outlet is connected to the second hydraulic cylinder (40). The oil pump (51) is configured to pump fluid from the oil tank (53) to the synchronous motor (52).

3. The vehicle hill-climbing test device according to claim 2, characterized in that, The hydraulic control unit (50) further includes a control valve assembly (54), the first outlet is connected to the first hydraulic cylinder (30) through the control valve assembly (54), and the second outlet is connected to the second hydraulic cylinder (40) through the control valve assembly (54). The control valve assembly (54) is configured to control the hydraulic difference between the first hydraulic cylinder (30) and the second hydraulic cylinder (40) within a preset range.

4. The vehicle hill-climbing test device according to claim 3, characterized in that, The first liquid outlet is connected to the first hydraulic cylinder (30) through the first delivery pipeline (55), and the second liquid outlet is connected to the second hydraulic cylinder (40) through the second delivery pipeline (56). The control valve assembly (54) includes a first relief valve (541) and a second relief valve (542). The first relief valve (541) is unidirectionally connected to the first delivery line (55) and the second delivery line (56). The first relief valve (541) is configured to allow fluid in the first delivery line (55) to flow to the second delivery line (56). The second relief valve (542) is unidirectionally connected to the first delivery line (55) and the second delivery line (56). The second relief valve (542) is configured to allow fluid in the second delivery line (56) to flow to the first delivery line (55).

5. The vehicle hill-climbing test device according to any one of claims 2-4, characterized in that, The hydraulic control unit (50) further includes a first main pipeline (57), one end of which is connected to the oil pump (51) and the other end is connected to the first inlet. The first main pipeline (57) is provided with a check valve (571), which is configured to allow one-way flow from one end of the first main pipeline (57) to the other end.

6. The vehicle hill-climbing test device according to claim 5, characterized in that, The hydraulic control unit (50) further includes a first return line (58), one end of which is connected to the first main line (57) and located downstream of the one-way valve (571), and the other end is connected to the oil tank (53). The first return line (58) is equipped with a spool valve (581).

7. The vehicle hill-climbing test device according to claim 5, characterized in that, The hydraulic control unit (50) also includes a second return line (59), one end of which is connected to the first main line (57) and located downstream of the one-way valve (571), and the other end is connected to the oil tank (53). The second return line (59) is equipped with a shut-off valve (591).

8. The vehicle hill-climbing test device according to any one of claims 1-4, characterized in that, It also includes a connecting sub-slope (60), which is disposed on the base (10) and located at one end of the climbing platform (20) that is rotatably connected to the base (10); And / or, it also includes a traction member (70), which is located at the other end of the climbing platform (20) along the length direction and is used to pull the vehicle.

9. The vehicle hill-climbing test device according to any one of claims 1-4, characterized in that, It also includes a first support frame (80) and a second support frame (90), the first support frame (80) and the second support frame (90) are respectively disposed on both sides of the climbing platform (20) along the width direction, and one end of the first hydraulic cylinder (30) is rotatably connected to the base (10) and the other end is rotatably connected to the first support frame (80), the first support frame (80) is rotatably connected to the first hydraulic cylinder (30), and the second support frame (90) is rotatably connected to the second hydraulic cylinder (40).

10. The vehicle hill-climbing test device according to claim 9, characterized in that, The connection point between the first support frame (80) and the first hydraulic cylinder (30) is located on the side of the climbing platform (20) away from the base (10); And / or, the connection position of the second support frame (90) and the second hydraulic cylinder (40) is located on the side of the climbing platform (20) away from the base (10).

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