Test device and test method for air suspension gas circuit reverse connection check

Abstract

The application belongs to the technical field of vehicle chassis, and relates to a testing device and a testing method for air suspension air path reverse connection inspection. The testing device for air suspension air path reverse connection inspection comprises a testing platform and a lifting mechanism. The testing platform comprises a first table top and a second table top, and at least one of the first table top and the second table top is connected with the lifting mechanism. The first table top is used for supporting a left wheel, and the second table top is used for supporting a right wheel. The testing platform has a testing state. In the testing state, a height difference is formed between the first table top and the second table top. The application establishes a height difference for the left wheel and the right wheel through the testing platform, so that whether the air path connected with the air bag is reversely connected can be conveniently and accurately judged by observing the change trend of the cross rod in the left and right height sensors.

Description

Technical Field

[0001] This application relates to the field of vehicle chassis technology, and in particular to a testing device and method for checking the reverse connection of air circuits in air suspension. Background Technology

[0002] With the development of vehicle chassis technology, air suspension technology emerged. Air suspension provides vehicles with excellent ride comfort and smoothness, and is therefore widely used in various passenger and commercial vehicles. Before leaving the factory, the air suspension needs to be calibrated. Calibration sets a suitable normal height and two extreme heights for the air suspension; these extreme heights are the minimum and maximum heights. During the production stage, there is a phenomenon where the air suspension air circuit is reversed. Even if the air circuit is reversed, calibration can still be successful, and it is not easily detected. Therefore, vehicles equipped with air suspensions with reversed air circuits pose a safety hazard.

[0003] In related technologies, manual inspection is required to check whether the gas path is reversed, and there is no equipment available to check for reversed gas path connections.

[0004] However, the aforementioned manual screening methods are less accurate and efficient, and require a high level of experience from the screening personnel. Summary of the Invention

[0005] Therefore, it is necessary to provide a testing device and method for reverse connection inspection of air suspension circuits, addressing the current issues of low accuracy and efficiency in manual inspection of air suspension circuits.

[0006] In a first aspect, this application provides a testing device for checking the reverse connection of air suspension circuits, comprising: a testing platform and a lifting mechanism; the testing platform includes a first platform and a second platform, at least one of the first platform and the second platform being connected to the lifting mechanism; the first platform is used to support the left wheel, and the second platform is used to support the right wheel; the testing platform has a testing state, in which a height difference is formed between the first platform and the second platform.

[0007] In one embodiment, the test platform is disposed within a groove on the bearing surface, and the test platform is adapted to the groove; the test platform has a reset state, in which both the first platform and the second platform are flush with the bearing surface.

[0008] In one embodiment, one end of the lifting mechanism is connected to the bottom of the groove, and the other end of the lifting mechanism is connected to the test platform.

[0009] In one embodiment, the projection shapes of the first platform and the second platform onto the bearing surface are rectangular, and the dimensions of the first platform and the second platform along the length of the vehicle are greater than half the diameter of the wheel.

[0010] In one embodiment, the lifting mechanism includes a first lifting component and a second lifting component; the first lifting component is connected to the first platform, and the second lifting component is connected to the second platform.

[0011] In one embodiment, the lifting mechanism is provided with a locking member, which is used to lock the test platform in the test state.

[0012] In one embodiment, the lifting mechanism is configured as any one of a hydraulic cylinder assembly, a pneumatic cylinder assembly, and a lead screw drive assembly.

[0013] In one embodiment, when the lifting mechanism is configured as the hydraulic cylinder assembly, the lifting mechanism includes a hydraulic cylinder and a hydraulic pump; the working port of the hydraulic pump is connected to the hydraulic cylinder, and the piston rod of the hydraulic cylinder is connected to the test platform.

[0014] In one embodiment, the lifting mechanism further includes a drive motor connected to the hydraulic pump.

[0015] In one embodiment, when the lifting mechanism is configured as the lead screw drive assembly, the lifting mechanism includes a lead screw, a lead screw nut, and a rotary motor; the lead screw nut is sleeved on the lead screw and connected to the test platform, and the lead screw is connected to the rotary motor.

[0016] Secondly, this application provides a test method applied to the test apparatus described above for checking reverse connections in air suspension systems, comprising:

[0017] With the left wheel on the first platform and the right wheel on the second platform, the test platform is confirmed to be in test mode.

[0018] Under the test conditions, the changing trend of the crossbar in the height sensors corresponding to the two wheels is obtained;

[0019] The changing trend is identified and processed to obtain the processing result.

[0020] The aforementioned test device and test method for checking the reverse connection of the air circuit in air suspension establishes a height difference between the left and right wheels through a test platform. By observing the changing trend of the crossbars in the height sensors on both sides, it is possible to conveniently and accurately determine whether the air circuit connected to the airbag is reversed.

[0021] During actual testing, activating the lifting mechanism changes the height of the first and second platforms, creating a height difference between them. This can be either the first platform being higher or lower than the second platform, as long as a height difference is formed. At this point, the test platform is in testing mode.

[0022] Correspondingly, the first and second platforms drive the wheels on both sides to form a height difference. The height sensors on the left and right sides detect the height change, and the controller controls the solenoid valve to inflate or deflate the corresponding airbag.

[0023] If the air circuit is connected correctly, the airbag on the side corresponding to the wheel with the lower relative height will be in a deflated state, which will cause the angle between the crossbar and the longitudinal bar on that side to gradually decrease and approach 90 degrees, and the crossbar will gradually become horizontal. The airbag on the side corresponding to the wheel with the higher relative height will be in an inflated state, which will cause the angle between the crossbar and the longitudinal bar on that side to gradually increase and approach 90 degrees, and the crossbar will gradually become horizontal. That is, when the air circuit is connected correctly, the crossbars on both sides can gradually become horizontal.

[0024] If the air lines are reversed, the airbag on the side corresponding to the lower wheel will be inflated, causing the angle between the crossbar and longitudinal bar on that side to continue to increase. Meanwhile, the airbag on the side corresponding to the higher wheel will be deflated, causing the angle between the crossbar and longitudinal bar on that side to continue to decrease. Neither side of the crossbar will be able to level out. In other words, if the air lines are reversed, the airbag that needs to deflate will be inflated, and the airbag that needs to be inflated will be deflated, and neither side of the crossbar will be able to level out.

[0025] By observing whether the crossbar tends to become horizontal, it can be determined whether the air circuit is reversed. The inspection method is relatively simple and intuitive, which improves the efficiency and accuracy of air suspension air circuit reverse connection inspection and testing. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a vehicle suspension provided in one embodiment of this application.

[0027] Figure 2 This is a schematic diagram of the structure of an air suspension provided in one embodiment of this application.

[0028] Figure 3 This is a schematic diagram of the air circuit principle of an air suspension provided in one embodiment of this application.

[0029] Figure 4 This is a top view of a wheel on a test platform, according to one embodiment of this application.

[0030] Figure 5This is one of the side view diagrams of a wheel located on a test platform according to an embodiment of this application.

[0031] Figure 6 This is a schematic diagram of the state of the height sensor when the wheel is lifted, according to one embodiment of this application.

[0032] Figure 7 This is a schematic diagram of the state of the height sensor when the wheel falls, according to one embodiment of this application.

[0033] Figure 8 This is a second side view of a wheel on a test platform, provided as an embodiment of this application.

[0034] Figure 9 This is a third side view of a wheel on a test platform, provided as an embodiment of this application.

[0035] Figure 10 This is a schematic diagram of the structure of a hydraulic cylinder assembly provided in one embodiment of this application.

[0036] Figure 11 This is a flowchart illustrating a testing method provided in one embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100. Airbag;

[0039] 200. Height sensor; 210. Horizontal bar; 220. Vertical bar;

[0040] 300. Solenoid valve; 310. First port; 320. Second port; 330. Third port; 340. Fourth port;

[0041] 400. Chassis;

[0042] 500. Axle;

[0043] 600. Test platform; 610. First work surface; 620. Second work surface;

[0044] 700. Lifting mechanism; 710. Hydraulic cylinder; 720. Hydraulic pump; 730. Drive motor;

[0045] 800, Wheel;

[0046] 900, bearing surface. Detailed Implementation

[0047] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0048] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0053] With the development of vehicle chassis technology, air suspension technology emerged. Air suspension provides vehicles with excellent ride comfort and smoothness, and is therefore widely used in various passenger and commercial vehicles. Before leaving the factory, the air suspension needs to be calibrated. Calibration sets a suitable normal height and two extreme heights for the air suspension; these extreme heights are the minimum and maximum heights. During the production stage, there is a phenomenon where the air suspension air circuit is reversed. Even if the air circuit is reversed, calibration can still be successful, and it is not easily detected. Therefore, vehicles equipped with air suspensions with reversed air circuits pose a safety hazard.

[0054] First, combine Figures 1 to 3 The structure and air circuit principle of air suspension in related technologies are described.

[0055] Figure 1 A schematic diagram of an air suspension system for a 4×2 vehicle model is shown, in which the rear axle is equipped with air suspension.

[0056] Figure 2 A partial structural schematic diagram of the air suspension is shown. Figure 3A schematic diagram of the air circuit connection principle of the air suspension is shown. The air suspension includes an airbag 100, a height sensor 200, a solenoid valve 300, a controller, and air pipes. The first port 310 of the solenoid valve 300 is used for air intake, the second port 320 is connected to the left airbag, the third port 330 is connected to the right airbag, and the fourth port 340 is used for air release. The airbag 100 is located between the frame 400 and the axle 500. The height sensor 200 is used to obtain the height of the frame 400 and feed the signal back to the controller, thereby realizing the inflation and deflation of the airbag 100.

[0057] The height sensor 200 includes a crossbar 210 and a longitudinal bar 220. One end of the crossbar 210 is hinged to one end of the longitudinal bar 220, and the other end of the crossbar 210 is hinged to the frame 400. The other end of the longitudinal bar 220 is fixedly connected to the axle 500. The longitudinal bar 220 can move vertically with the axle 500. When the relative position between the axle 500 and the frame 400 changes, the angle between the crossbar 210 and the longitudinal bar 220 also changes. When the axle 500 is at its normal height, the angle between the crossbar 210 and the longitudinal bar 220 changes. The included angle between the longitudinal bars 220 is 90 degrees. When the axle 500 is below the normal height, the included angle between the crossbar 210 and the longitudinal bars 220 is greater than 90 degrees. The controller controls the solenoid valve 300 to deflate the airbag 100 so that the crossbar 210 can be leveled. When the axle 500 is above the normal height, the included angle between the crossbar 210 and the longitudinal bars 220 is less than 90 degrees. The controller controls the solenoid valve 300 to inflate the airbag 100 so that the crossbar 210 can be leveled.

[0058] During air suspension calibration, the left and right airbags 100 are simultaneously inflated from a deflated state to their normal height. This means that the second port 320 and the third port 330 of the solenoid valve 300 open simultaneously to inflate the left and right airbags 100. Even if the air lines are reversed, the airbags 100 will still reach the required calibrated height. Therefore, there is a possibility that calibration can be successful even with reversed air lines. Here, reversed air lines mean that the second port 320 is connected to the right airbag and the third port 330 is connected to the left airbag. In the case of reversed air lines, when the left axle is higher than the normal height, the controller will correspondingly control the second port 320 of the solenoid valve 300 to open, intending to inflate the left airbag. However, due to the reversed air lines, the second port 320 will inflate the right airbag instead, which will cause the vehicle to tilt, thus posing a safety hazard.

[0059] Based on the structure and air circuit principle of the air suspension described above, this application provides a testing device and testing method for checking the reverse connection of the air circuit of the air suspension.

[0060] See Figures 4 to 9 , Figure 4 This illustration shows a top view of a wheel positioned on a test platform according to one embodiment of the present application. Figure 5One of the side view schematic diagrams of a wheel located on a test platform according to an embodiment of this application is shown. Figure 6 This illustration shows a schematic diagram of the height sensor's state when the wheel is lifted, according to one embodiment of this application. Figure 7 This illustration shows a schematic diagram of the height sensor's state when the wheel falls, according to one embodiment of this application. Figure 8 This is a second side view schematic diagram of a wheel located on a test platform according to an embodiment of this application. Figure 9 The third side view of a wheel on a test platform is shown in one embodiment of the present application. The test device for air suspension air circuit reverse connection inspection provided in one embodiment of the present application includes a test platform 600 and a lifting mechanism 700.

[0061] The test platform 600 includes a first platform 610 and a second platform 620. At least one of the first platform 610 and the second platform 620 is connected to a lifting mechanism 700. It can be understood that the first platform 610 is connected to the lifting mechanism 700, and the lifting mechanism 700 controls the lifting of the first platform 610; or the second platform 620 is connected to the lifting mechanism 700, and the lifting mechanism 700 controls the lifting of the second platform 620; or both the first platform 610 and the second platform 620 are connected to the lifting mechanism 700, and the lifting mechanism 700 controls the lifting of both the first platform 610 and the second platform 620. The first platform 610 is used to support the left wheel, and the second platform 620 is used to support the right wheel. The test platform 600 has a test state, in which a height difference is formed between the first platform 610 and the second platform 620.

[0062] Specifically, the test device for checking the reverse connection of the air circuit of the air suspension shown in this embodiment establishes a height difference between the left wheel and the right wheel through the test platform 600. By observing the changing trend of the crossbar 210 in the height sensors 200 on both sides, it is possible to conveniently and accurately determine whether the air circuit connected to the airbag 100 is reversed.

[0063] During actual testing, activating the lifting mechanism 700 changes the height of the first platform 610 and the second platform 620, creating a height difference between them. This difference can be either the first platform 610 being higher than the second platform 620 or the first platform 610 being lower than the second platform 620, as long as a height difference is formed. At this time, the test platform 600 is in the testing state.

[0064] Correspondingly, the first platform 610 and the second platform 620 respectively drive the wheels 800 on both sides to form a height difference. The height sensors 200 on the left and right sides detect the height change, and the controller controls the solenoid valve 300 to perform inflation and deflation operations on the corresponding airbags 100.

[0065] If the air circuit is connected correctly, the airbag 100 on the side corresponding to the lower-height wheel 800 will be in a deflated state, which will cause the angle between the crossbar 210 and the longitudinal bar 220 on that side to gradually decrease and approach 90 degrees, and the crossbar 210 will gradually become horizontal. The airbag 100 on the side corresponding to the higher-height wheel 800 will be in an inflated state, which will cause the angle between the crossbar 210 and the longitudinal bar 220 on that side to gradually increase and approach 90 degrees, and the crossbar 210 will gradually become horizontal. That is, when the air circuit is connected correctly, the crossbars 210 on both sides can gradually become horizontal.

[0066] If the air lines are reversed, the airbag 100 on the side corresponding to the lower-height wheel 800 will be inflated, causing the angle between the crossbar 210 and the longitudinal bar 220 on that side to continue to increase. Meanwhile, the airbag 100 on the side corresponding to the higher-height wheel 800 will be deflated, causing the angle between the crossbar 210 and the longitudinal bar 220 on that side to continue to decrease. Neither of the crossbars 210 on either side will be able to become horizontal. In other words, when the air lines are reversed, the airbag 100 that needs to be deflated will be inflated, and the airbag 100 that needs to be inflated will be deflated, and neither of the crossbars 210 on either side will be able to become horizontal.

[0067] By observing whether the crossbar 210 tends to become horizontal, it can be determined whether the air circuit is reversed. The inspection method is relatively simple and intuitive, which improves the efficiency and accuracy of air suspension air circuit reverse connection inspection and testing.

[0068] Combination Figure 5 , Figure 8 and Figure 9 As shown, in some embodiments, the test platform 600 shown in this embodiment is disposed in the groove of the bearing surface 900, and the test platform 600 is adapted to the groove; the test platform 600 has a reset state, in which the first platform 610 and the second platform 620 are both flush with the bearing surface 900.

[0069] Specifically, by placing the test platform 600 within the groove of the bearing surface 900, and simultaneously adjusting the test platform 600 to a reset state under the drive of the lifting mechanism 700, it is convenient to drive the vehicle to be tested onto the test platform 600. In the testing state, not only can one platform be lowered and the other raised, but one platform can also be kept flush with the bearing surface 900 while raising or lowering the other platform, i.e., performing a unilateral lifting or lowering operation on the wheel 800. After the test is completed, the test platform 600 is adjusted to a reset state so that the vehicle can leave the test platform 600.

[0070] Specifically, the bearing surface 900 can be the ground.

[0071] Furthermore, in some embodiments, when performing a unilateral lifting or lowering operation on the wheel 800, the test platform 600 can be optimized by configuring one of the platforms as a solid bearing surface and the other platform as a liftable platform, thereby reducing the overall size of the test platform 600.

[0072] Combination Figure 5 , Figure 8 and Figure 9 As shown, in some embodiments, the lifting mechanism 700 shown in this embodiment is disposed in the groove, one end of the lifting mechanism 700 is connected to the bottom of the groove, and the other end of the lifting mechanism 700 is connected to the test platform 600, thereby making full use of the internal space of the groove to arrange the lifting mechanism 700.

[0073] Combination Figure 4 , Figure 7 and Figure 9 As shown, in some embodiments, the first platform 610 and the second platform 620 shown in this embodiment are projected onto the bearing surface 900 in a rectangular shape to better fit the wheel 800, which has a rectangular projection shape. The dimensions of the first platform 610 and the second platform 620 along the length of the vehicle are greater than half the diameter of the wheel 800, so that when the first platform 610 and the second platform 620 are lowered, the wheel 800 can fully fall into the groove to establish an effective height difference, thereby improving the accuracy of observation during testing.

[0074] In some embodiments, when the first platform 610 and the second platform 620 are respectively connected to the lifting mechanism 700, the lifting mechanism 700 includes a first lifting component and a second lifting component; the first lifting component is connected to the first platform 610, and the second lifting component is connected to the second platform 620. The two lifting components respectively control the lifting of the first platform 610 and the second platform 620, thereby establishing a reliable height difference between the first platform 610 and the second platform 620.

[0075] In some embodiments, the lifting mechanism 700 shown in this embodiment is provided with a locking member, which is used to lock the test platform 600 in the test state, thereby maintaining the two wheels 800 on both sides at the current height difference to improve the accuracy of the test.

[0076] In some embodiments, the lifting mechanism 700 shown in this embodiment is configured as any one of a hydraulic cylinder assembly, a pneumatic cylinder assembly, and a lead screw drive assembly.

[0077] Combination Figure 10 As shown, Figure 10A schematic diagram of the structure of a hydraulic cylinder assembly in one embodiment of this application is shown. In some embodiments, when the lifting mechanism 700 is configured as a hydraulic cylinder assembly, the lifting mechanism 700 includes a hydraulic cylinder 710 and a hydraulic pump 720. The working oil port of the hydraulic pump 720 is connected to the hydraulic cylinder 710. The piston rod of the hydraulic cylinder 710 is connected to the test platform 600. The piston rod is raised or lowered by the pumping or suction of the hydraulic pump 720, which corresponds to the raising or lowering of the first platform 610 or the second platform 620. In this case, the locking element can be a shut-off valve.

[0078] Furthermore, combined Figure 10 As shown, in some embodiments, the lifting mechanism 700 shown in this embodiment further includes a drive motor 730, which is connected to the hydraulic pump 720. The forward or reverse rotation of the drive motor 730 enables the hydraulic pump 720 to pump or suck.

[0079] In some embodiments, when the lifting mechanism 700 is configured as a lead screw drive assembly, the lifting mechanism 700 includes a lead screw, a lead screw nut, and a rotary motor; the lead screw nut is sleeved on the lead screw and connected to the test platform 600, and the lead screw is connected to the rotary motor.

[0080] Specifically, the movement of the lead screw nut on the lead screw is achieved by rotating the motor in the forward or reverse direction, thereby driving the first platform 610 or the second platform 620 to rise or fall. In this case, the locking element can be a latch configured on the lead screw nut.

[0081] This application also provides a test method applied to the test apparatus described above for checking reverse connection of air suspension circuits.

[0082] Combination Figure 11 , Figure 11 A flowchart of a testing method provided in an embodiment of this application is shown. In some embodiments, the testing method shown in this embodiment includes steps 111, 112 and 113.

[0083] Step 111: With the left wheel on the first platform and the right wheel on the second platform, confirm that the test platform has entered the test state.

[0084] In this step, the vehicle to be tested is driven onto the test platform so that the left wheel is on the first platform and the right wheel is on the second platform. The lifting mechanism is then activated to put the test platform into test mode, thereby establishing the height difference between the two wheels.

[0085] Step 112: Under test conditions, obtain the changing trend of the crossbar in the height sensors corresponding to the wheels on both sides.

[0086] In this step, as the wheel is raised or lowered, the crossbar in the corresponding height sensor will first change from a horizontal state to an inclined state. The controller will then control the solenoid valve to inflate or deflate the airbag to make the crossbar more horizontal.

[0087] If the air lines are connected correctly, the crossbars corresponding to both wheels will gradually become horizontal, meaning the trend is towards horizontality. If the air lines are connected incorrectly, the crossbars corresponding to both wheels will not become horizontal and will instead increase the tilt, meaning the trend is towards continued tilting.

[0088] Step 113: Identify and process the changing trends to obtain the processing results.

[0089] In this step, as described above, if the detected trend is towards horizontal, the output indicates that the air path connection is correct; if the detected trend is towards continued tilting, the output indicates that the air path connection is reversed, thus completing the test.

[0090] After step 113, the control mechanism is also included to adjust the test platform to the reset state so that the test platform is flush with the bearing surface so that the vehicle can drive away from the test platform.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A test method applied to a test apparatus for checking reverse connections in air suspension systems, characterized in that, The testing device for checking the reverse connection of the air suspension air circuit includes a testing platform and a lifting mechanism; the testing platform includes a first platform and a second platform, at least one of the first platform and the second platform is connected to the lifting mechanism; the first platform is used to support the left wheel, and the second platform is used to support the right wheel. The test platform has a test state, in which a height difference is formed between the first platform and the second platform; The testing method includes: When the left wheel is on the first platform and the right wheel is on the second platform, the test platform is determined to enter the test state; wherein, the vehicle to be tested is driven to the test platform so that the left wheel is on the first platform and the right wheel is on the second platform, the lifting mechanism is activated, so that the test platform enters the test state, thereby establishing a height difference between the two wheels; Under the test conditions, the changing trend of the crossbars in the height sensors corresponding to the two wheels is obtained. When the crossbars in the corresponding height sensors change from a horizontal state to an inclined state, the controller controls the solenoid valve to inflate or deflate the airbag to make the crossbars tend to be horizontal. If the air circuit is connected correctly, the crossbars corresponding to the two wheels can gradually tend to be horizontal, and the changing trend is horizontal. If the air circuit is reversed, the crossbars corresponding to the two wheels cannot tend to be horizontal, and the changing trend is continued to be inclined. The changing trend is identified and processed to obtain the processing result; if the changing trend is identified as tending to be horizontal, the processing result of correct air path connection is output; if the changing trend is identified as continuing to tilt, the processing result of reversed air path connection is output, and the test is completed.

2. The test method according to claim 1, characterized in that, The testing device for checking reverse connection of air suspension air circuits includes: a testing platform and a lifting mechanism; The test platform includes a first platform and a second platform, at least one of which is connected to the lifting mechanism; the first platform is used to support the left wheel, and the second platform is used to support the right wheel. The test platform is in a test state, in which a height difference is formed between the first platform and the second platform.

3. The test method according to claim 2, characterized in that, The test platform is disposed in the groove of the bearing surface, and the test platform is adapted to the groove; the test platform has a reset state, in which the first platform and the second platform are flush with the bearing surface.

4. The test method according to claim 3, characterized in that, One end of the lifting mechanism is connected to the bottom of the groove, and the other end of the lifting mechanism is connected to the test platform.

5. The test method according to claim 2, characterized in that, The projection shapes of the first platform and the second platform on the bearing surface are rectangular, and the dimensions of the first platform and the second platform along the length of the vehicle are greater than half the diameter of the wheel.

6. The test method according to claim 2, characterized in that, The lifting mechanism includes a first lifting component and a second lifting component; The first lifting component is connected to the first platform, and the second lifting component is connected to the second platform.

7. The test method according to claim 2, characterized in that, The lifting mechanism is equipped with a locking component, which is used to lock the test platform in the test state.

8. The test method according to claim 2, characterized in that, The lifting mechanism is configured as any one of a hydraulic cylinder assembly, a pneumatic cylinder assembly, and a lead screw drive assembly.

9. The test method according to claim 8, characterized in that, When the lifting mechanism is configured as the hydraulic cylinder assembly, the lifting mechanism includes a hydraulic cylinder and a hydraulic pump; the working port of the hydraulic pump is connected to the hydraulic cylinder, and the piston rod of the hydraulic cylinder is connected to the test platform.

10. The test method according to claim 9, characterized in that, The lifting mechanism also includes a drive motor, which is connected to the hydraulic pump.

11. The test method according to claim 8, characterized in that, When the lifting mechanism is configured as the lead screw drive assembly, the lifting mechanism includes a lead screw, a lead screw nut, and a rotary motor; the lead screw nut is sleeved on the lead screw and connected to the test platform, and the lead screw is connected to the rotary motor.

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