An electric drive axle assembly inclination lubrication test test bench

Abstract

The utility model relates to test device technical field, concretely relates to a kind of electric drive bridge assembly inclination lubrication test test-bed, including rack body, overturning platform is equipped on rack body, overturning platform includes outer frame, inner platform is rotatably equipped in outer frame;Four mounting seats arranged along transverse direction are equipped on inner platform, the two mounting seats in middle can install measured electric drive bridge assembly, two mounting seats on both sides are each equipped with electric eddy current retarder, the transmission shaft of two electric eddy current retarders is coaxial and is oppositely arranged, the transmission shaft of each electric eddy current retarder is along transverse direction setting, the transmission shaft of each electric eddy current retarder is each equipped with a wheel edge connection tooling, each wheel edge connection tooling can be connected with measured electric drive bridge assembly.The utility model is equipped with electric eddy current retarder in transverse direction both sides mounting seat, provides torque load for measured electric drive bridge assembly, simulates the load working condition of real vehicle, ensures that test result is more real.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a test bench for tilting lubrication testing of an electric drive bridge assembly. Background Technology

[0002] In actual driving conditions of new energy vehicles, the lubrication status of key moving components such as gears and bearings inside the electric drive axle assembly directly affects the transmission efficiency and service life of the drive system. Different road conditions (such as uphill and downhill slopes, curves, etc.) can cause the vehicle to tilt in different directions, thereby changing the distribution of lubricating oil level inside the electric drive axle and affecting the lubrication effect of rotating components. Poor lubrication leads to a decrease in transmission efficiency. Therefore, it is necessary to conduct tilt lubrication tests on the electric drive axle assembly to simulate the tilting conditions of the actual vehicle and monitor the internal lubrication status of the electric drive axle assembly in real time.

[0003] Patent CN114184377A discloses a lubrication test method for a drive axle main reducer. It uses a lubrication test device for a drive axle main reducer. The test device has a stand mounted on a truss. The truss is equipped with a front and rear tilt angle control mechanism. A motor is installed on the stand. The front and rear tilt angle control mechanism can adjust the slope of the drive axle main reducer. The motor can drive the drive axle main reducer into a driving state, thereby realizing the test of the lubrication state of the drive axle main reducer under different slope conditions.

[0004] However, in the above scheme, the drive axle main reducer is always in an unloaded state, without considering the torque load on the drive axle during actual vehicle operation, such as the peak torque during start-up acceleration and the continuous load during hill climbing. Under actual operating conditions, the load will change the gear meshing pressure and the rate of frictional heat generation, directly affecting the formation of the lubricating oil film and the heat dissipation effect. The unloaded test results deviate significantly from the actual lubrication conditions. Utility Model Content

[0005] To address the technical problem in existing technologies where the main reducer of the drive axle is always in an unloaded state during tilt lubrication tests of the drive axle, without considering the torque load borne by the drive axle during actual vehicle operation, resulting in a significant deviation between the unloaded test results and the actual lubrication state, this utility model provides a test bench for tilt lubrication testing of an electric drive axle assembly.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A test bench for tilt lubrication testing of an electric drive axle assembly includes a bench body with a tilting platform. The tilting platform includes an outer frame and an inner platform rotatably located inside the outer frame. The outer frame can rotate around a longitudinally arranged rotation axis, and the inner platform can rotate around a transversely arranged rotation axis. The inner platform has four mounting seats arranged transversely. The two middle mounting seats can mount the electric drive axle assembly under test. The two mounting seats on the two sides of the transverse direction are each equipped with an eddy current retarder. The drive shafts of the two eddy current retarders are coaxial and opposite to each other, and the centerline of the drive shaft of each eddy current retarder is arranged transversely. Each drive shaft of each eddy current retarder is equipped with a wheel-side connecting fixture, and each wheel-side connecting fixture can be connected to the electric drive axle assembly under test.

[0008] By adopting the above structural scheme, eddy current retarders are installed on the lateral mounting seats on both sides, and the drive shaft of the eddy current retarders is connected to the electric drive axle assembly under test using wheel-side connecting fixtures. This provides a torque load to the electric drive axle assembly under test, simulating load conditions such as vehicle start-up acceleration and hill climbing. This overcomes the problems of no-load operation of the drive axle main reducer and significant deviation between test results and actual lubrication conditions in existing technologies, ensuring that the test results are more consistent with actual use scenarios. The outer frame of the tilting platform can be tilted around the longitudinal rotation axis, and the inner platform can be tilted around the lateral rotation axis, which can simulate the curves and uphill / downhill conditions of real vehicles, respectively, changing the distribution of lubricating oil level inside the electric drive axle assembly under test. This comprehensively simulates the lubrication environment under different road conditions, providing conditions for accurate testing of lubrication status. The four horizontally arranged mounting brackets have clearly defined functions. The two middle mounting brackets are used to stably mount the electric drive bridge assembly under test, while the mounting brackets on both sides are used to fix the eddy current retarders. The drive shafts of the eddy current retarders are set coaxially and opposite each other to ensure the coaxiality and stability of power transmission, ensure uniform load application, and avoid affecting the accuracy of the test due to structural misalignment.

[0009] As a preferred implementation of a test bench for tilting lubrication of an electric drive bridge assembly, the top of the test bench body is equipped with two cooling fans, each corresponding to an electric eddy current retarder, and the orientation of each cooling fan is aligned with the corresponding electric eddy current retarder.

[0010] With the above structural design, cooling fans corresponding to the eddy current retarders are installed on the top of the test bench, with the fans oriented towards the respective eddy current retarders. This allows for timely dissipation of the heat generated by the eddy current retarders during operation. During testing, the eddy current retarders continuously generate heat due to the torque load they provide. Heat accumulation can lead to a decline in their performance and even affect the stability of the load applied to the tested electric drive bridge assembly. The cooling fans maintain a stable operating temperature for the eddy current retarders, ensuring the accuracy of the load output and thus guaranteeing the smooth progress of the tilt lubrication test and the reliability of the test data.

[0011] As a preferred implementation of a test bench for tilting lubrication testing of an electric drive bridge assembly, the top of the test bench body is equipped with a motor controller, a host computer, a radiator, a battery simulator, and a data signal acquisition unit. The motor controller can be electrically connected to the electric drive bridge assembly under test and the host computer. The radiator can dissipate heat for the electric drive bridge assembly under test and the motor controller. The battery simulator can be electrically connected to the electric drive bridge assembly under test. The data signal acquisition unit can be electrically connected to the thermocouple sensor installed on the electric drive bridge assembly under test.

[0012] Using the above structural design, the motor controller establishes an electrical connection between the tested electric drive axle assembly and the host computer. The host computer can regulate the operating status of the tested electric drive axle assembly through the motor controller. Simultaneously, the battery simulator provides stable power support to the tested electric drive axle assembly, ensuring it operates normally according to test requirements and simulating the power supply state of a real vehicle. The radiator can simultaneously cool both the tested electric drive axle assembly and the motor controller. During the test, the operation of gears and bearings inside the tested electric drive axle assembly and the operation of the motor controller generate heat. If the temperature is too high, it will damage components or change the performance of the lubricating oil, affecting the test results. The radiator can maintain the operating temperature of both within a reasonable range, ensuring normal operation of components and a stable test environment. The data signal acquisition unit is electrically connected to the thermocouple sensor on the tested electric drive axle assembly, enabling real-time acquisition of temperature data from key parts of the tested electric drive axle assembly. Operators can use this temperature data to determine the lubrication effect of the internal lubricating oil, providing data support for subsequent analysis of lubrication status and evaluation of the electric drive axle assembly performance.

[0013] As a preferred implementation of a test bench for tilting lubrication of an electric drive axle assembly, the top surface of the test bench body has a tilting groove, and the tilting platform is located in the tilting groove.

[0014] By adopting the above structural design, the height of the flipping platform can be reduced, making it easier to install other components, such as motor controllers, host computers, cooling water tanks, battery simulators, and data signal acquisition units.

[0015] As a preferred implementation of a test bench for tilting lubrication of an electric drive bridge assembly, a tilting motor is provided on each of the longitudinal sides of the outer frame. The tilting motor is installed on the test bench body, and the two tilting motors are arranged opposite each other. The axis of the output shaft of the two tilting motors is coaxially arranged along the longitudinal direction, and the output shaft of the two tilting motors is connected to the outer wall of the outer frame.

[0016] Using the above structural design, opposing tilting motors are installed on both sides of the outer frame's longitudinal axis. The output shafts of the tilting motors are connected to the outer wall of the outer frame, and the centerline of the output shafts is coaxial along the longitudinal axis. Driven by the tilting motors, the tilting angle and speed of the outer frame around the longitudinal axis can be precisely controlled. When simulating the lateral tilting of a real vehicle on a curve, operators can control the operation of the tilting motors to cause the outer frame to drive the inner platform and the tested electric drive axle assembly to tilt laterally to different degrees. This accurately reproduces the vehicle tilting state under different curve curvatures, providing a stable and controllable drive structure for testing lubrication effects at different lateral tilting angles, ensuring the accuracy of the tilt simulation.

[0017] As a preferred implementation of a test bench for tilting lubrication of an electric drive bridge assembly, a rotating shaft is provided through both sides of the outer frame. The axis of the rotating shaft is set in the transverse direction. The rotating shaft is rotatably connected to the outer frame. The end of the rotating shaft facing the inside of the outer frame is fixedly connected to the inner platform. The end of one of the two rotating shafts facing the outside of the outer frame is coaxially connected to the output shaft of the second rotating motor. The second rotating motor is installed on the outer wall of the outer frame.

[0018] The above structural design incorporates rotating shafts that run through both sides of the outer frame. One end of each shaft is fixed to the inner platform, while the other end is coaxially connected to the output shaft of the second tilting motor. The rotating shafts are rotatably connected to the outer frame. Driven by the second tilting motor, the tilting angle and speed of the inner platform around the lateral axis of rotation can be precisely controlled. When simulating longitudinal tilting conditions on inclines and declines of a real vehicle, the second tilting motor drives the rotating shafts, thereby causing the inner platform and the tested electric drive axle assembly to tilt longitudinally to varying degrees. This accurately reproduces the vehicle tilting state under different slopes (such as steep and gentle slopes), providing a reliable drive for testing lubrication effects at different longitudinal tilting angles. This ensures the accuracy and stability of the longitudinal tilting simulation and further improves multi-condition simulation capabilities.

[0019] As a preferred implementation of a test bench for tilting lubrication of an electric drive axle assembly, both of the two mounting bases in the middle include a base pressure plate. The base pressure plate is installed on the top of the inner platform. Each of the two base pressure plates is provided with two leaf spring support bases arranged in the longitudinal direction. The top of the two leaf spring support bases is connected to a leaf spring seat pressure plate. The leaf spring seat pressure plate and the leaf spring support bases are connected by vertically arranged bolts. Both ends of the electric drive axle assembly under test can be pressed between the leaf spring seat pressure plate and the leaf spring support bases.

[0020] With the above structural design, the base plates of the two middle mounting seats are fixed to the top of the inner platform. Leaf spring support bases are arranged longitudinally on the base plates, and the leaf spring base plates and leaf spring support bases are connected by vertical bolts. The two ends of the electric drive bridge assembly under test are pressed between the leaf spring base plates and leaf spring support bases. The distance between the leaf spring base plates and leaf spring support bases can be adjusted via bolts, accommodating electric drive bridge assemblies of different sizes and thicknesses. This ensures a secure fixation of the electric drive bridge assembly under test, preventing displacement or shaking during rotation and operational testing. It also ensures the stability of the electric drive bridge assembly during testing, avoiding any impact on power transmission and test data accuracy due to loose components.

[0021] As a preferred implementation of a test bench for tilting lubrication of an electric drive bridge assembly, both mounting seats on the lateral sides include a base plate II. The base plate II is installed on the top of the inner platform. Each of the two base plates II is provided with two retarder fixing brackets arranged in the longitudinal direction. The electric eddy current retarder is installed between the two corresponding retarder fixing brackets.

[0022] With the above structural design, the base plates of the horizontal mounting seats on both sides are fixed to the top of the inner platform. The retarder fixing brackets are arranged longitudinally on the base plates, and the eddy current retarder is installed between two corresponding retarder fixing brackets. By supporting and fixing the eddy current retarder with two retarder fixing brackets, the eddy current retarder can be stably installed on the inner platform. When the eddy current retarder is working and providing torque load, it can prevent it from shaking or shifting, ensuring the coaxiality between the eddy current retarder drive shaft and the tested electric drive bridge assembly. This ensures stable power transmission and uniform load application, avoiding the impact of unstable eddy current retarder installation on test results.

[0023] As a preferred implementation of a test bench for tilting lubrication of an electric drive axle assembly, the wheel-side connection fixture includes a cylindrical wheel-side connecting cylinder. A coupling is coaxially provided inside the wheel-side connecting cylinder. The coupling is fixedly connected to the wheel-side connecting cylinder. The drive shaft of the eddy current retarder is connected to the output shaft of the electric drive axle assembly under test through the coupling.

[0024] In the above structural design, a coupling is coaxially installed inside the cylindrical wheel-side connecting cylinder of the wheel-side connecting fixture. The drive shaft of the eddy current retarder is connected to the output shaft of the electric drive axle assembly under test via the coupling. The coupling enables a flexible connection between the two, compensating for possible coaxiality errors during installation, reducing vibration transmission, and ensuring stable torque transmission from the eddy current retarder to the electric drive axle assembly under test during testing. This avoids component impact damage caused by rigid connections, while also ensuring the continuity and stability of load application, improving the reliability of the test and extending component lifespan.

[0025] As a preferred implementation of a test bench for tilting lubrication of an electric drive axle assembly, the two ends of the wheel-side connecting cylinder are respectively fixedly connected to an annular hub mounting plate and a connecting plate. The wheel-side connecting cylinder is coaxially arranged with the hub mounting plate and the connecting plate, and the two ends of the coupling are respectively fixedly connected to the hub mounting plate and the connecting plate.

[0026] The above structural design features a circular hub mounting plate and a connecting plate fixed to both ends of the wheel-side connecting cylinder, all three being coaxially aligned. The coupling is fixedly connected to both ends of the hub mounting plate and the connecting plate. This further optimizes the connection stability of the wheel-side connecting fixture, allowing the hub mounting plate and connecting plate to achieve a closer fit with the eddy current retarder and the tested electric drive axle assembly, enhancing the structural strength of the connection points and preventing breakage or loosening during torque transmission. Simultaneously, the modular design facilitates the replacement of appropriate hub mounting plates and connecting plates for different models of eddy current retarders and tested electric drive axle assemblies, improving the versatility of the wheel-side connecting fixture, reducing testing costs, and increasing testing efficiency.

[0027] The beneficial effects of this utility model include:

[0028] 1. By installing eddy current retarders on both sides of the transverse mounting base and connecting the drive shaft of the eddy current retarders to the electric drive axle assembly under test using wheel-side connecting fixtures, a torque load is provided to the electric drive axle assembly under test, simulating load conditions such as starting acceleration and climbing of a real vehicle. This overcomes the problems of no-load operation of the drive axle main reducer and significant deviation between test results and actual lubrication conditions in the existing technology, ensuring that the test results are more in line with actual use scenarios.

[0029] 2. The outer frame of the flipping platform can be flipped around the longitudinal rotation axis, and the inner platform can be flipped around the lateral rotation axis. It can simulate the actual vehicle's curves and uphill and downhill conditions, change the distribution of lubricating oil level inside the tested electric drive axle assembly, and comprehensively simulate the lubrication environment under different road conditions, providing conditions for accurate testing of lubrication status.

[0030] 3. The four horizontally arranged mounting brackets have clearly defined functions. The two middle mounting brackets are used to stably mount the electric drive bridge assembly under test, while the mounting brackets on both sides are used to fix the eddy current retarders. The drive shafts of the eddy current retarders are set coaxially and opposite each other to ensure the coaxiality and stability of power transmission, ensure uniform load application, and avoid affecting the accuracy of the test due to structural misalignment. Attached Figure Description

[0031] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a test bench for tilting lubrication of an electric drive bridge assembly according to a specific embodiment of this utility model;

[0033] Figure 2 This is a schematic diagram of the structure of the leaf spring support base in a specific embodiment of this utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the leaf spring seat pressure plate in a specific embodiment of this utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the base pressure plate in a specific embodiment of this utility model;

[0036] Figure 5 This is a schematic diagram of the retarder fixing bracket in a specific embodiment of the present utility model;

[0037] Figure 6 This is a schematic diagram of the structure of the wheel-side connecting cylinder in a specific embodiment of this utility model;

[0038] Figure 7 This is a schematic diagram of the coupling structure in a specific embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of the structure of the wheel hub mounting disc in a specific embodiment of the present utility model;

[0040] Figure 9 This is a schematic diagram of the connecting disk in a specific embodiment of the present invention.

[0041] List of components and reference numerals:

[0042] 1. Bench body; 11. Tilting slot; 2. Tilting platform; 21. Outer frame; 22. Inner platform; 3. Mounting base; 31. Base pressure plate one; 32. Leaf spring support base; 33. Leaf spring seat pressure plate; 34. Base pressure plate two; 35. Retarder fixing bracket; 4. Test electric drive bridge assembly; 5. Eddy current retarder; 6. Wheel-side connecting fixture; 61. Wheel-side connecting cylinder; 62. Coupling; 63. Wheel hub mounting plate; 64. Connecting plate; 7. Cooling fan; 8. Motor controller; 9. Host computer; 010. Cooling water tank; 011. Battery simulator; 012. Data signal acquisition unit; 013. Tilting motor one; 014. Rotating shaft; 015. Tilting motor two. Detailed Implementation

[0043] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Reference Figure 1 This embodiment proposes a test bench for tilting lubrication of electric drive bridge assembly, including a test bench body 1. The top surface of the test bench body 1 has a flipping groove 11. A flipping platform 2 is provided in the flipping groove 11. The flipping platform 2 includes an outer frame 21. An inner platform 22 is rotatably provided inside the outer frame 21. The outer frame 21 can flip around a longitudinally arranged rotation axis, and the inner platform 22 can flip around a transversely arranged rotation axis.

[0045] To enable the outer frame 21 to rotate around a longitudinally oriented axis, a rotation motor 013 is provided on each of the longitudinal sides of the outer frame 21. The rotation motors 013 are mounted on the frame body 1, and the two rotation motors 013 are arranged opposite each other. The centerlines of the output shafts of the two rotation motors 013 are coaxial along the longitudinal direction, and the output shafts of both rotation motors 013 are connected to the outer wall of the outer frame 21. The rotation of the outer frame 21 is controlled by the rotation motors 013, which enables the angle adjustment of the drive axle assembly when the vehicle tilts left or right.

[0046] To enable the inner platform 22 to rotate around a laterally positioned axis of rotation, rotating shafts 014 are provided on both sides of the outer frame 21. The axis of rotation 014 is positioned laterally, and the rotating shafts 014 are rotatably connected to the outer frame 21. One end of the rotating shaft 014 facing inward to the outer frame 21 is fixedly connected to the inner platform 22. The end of one of the two rotating shafts 014 facing outward to the outer frame 21 is coaxially connected to the output shaft of the second rotating motor 015, which is mounted on the outer wall of the outer frame 21. The rotation of the inner platform 22 is controlled by the second rotating motor 015, enabling the adjustment of the pitch angle of the drive axle assembly when the vehicle is going uphill or downhill.

[0047] Reference Figure 1The inner platform 22 has four horizontally arranged mounting seats 3. The two middle mounting seats 3 can mount the electric drive axle assembly 4 under test. Two eddy current retarders 5 are mounted on the two mounting seats on either side of the platform. The drive shafts of the two eddy current retarders 5 are coaxial and opposite to each other, and the centerline of the drive shaft of each eddy current retarder 5 is horizontally aligned. Each drive shaft of the eddy current retarder 5 is equipped with a wheel-side connecting fixture 6, which can be connected to the electric drive axle assembly 4 under test. By using the eddy current retarder 5 as the output load, different sizes of output loads on the electric drive axle assembly can be achieved by selecting different models of retarders and different gears.

[0048] Reference Figure 1 and Figure 2-4 The two mounting bases 3 in the middle each include a base pressure plate 31. The base pressure plate 31 is installed on the top of the inner platform 22. Each of the two base pressure plates 31 is provided with two leaf spring support bases 32 arranged in the longitudinal direction. The top of the two leaf spring support bases 32 is connected to a leaf spring seat pressure plate 33. The leaf spring seat pressure plate 33 and the leaf spring support base 32 are connected by vertically arranged bolts. The two ends of the electric drive bridge assembly 4 under test can be pressed between the leaf spring seat pressure plate 33 and the leaf spring support base 32.

[0049] Reference Figure 1 and Figure 5 The two mounting bases 3 located on the horizontal sides each include a base pressure plate 34. The base pressure plate 34 is installed on the top of the inner platform 22. Each of the two base pressure plates 34 is provided with two retarder fixing brackets 35 arranged in the longitudinal direction. The eddy current retarder 5 is installed between the two corresponding retarder fixing brackets 35.

[0050] The base plate 31 and the base plate 34 are identical in shape and both have strip-shaped connecting holes for connecting to the corresponding leaf spring support base 32 and retarder fixing bracket 35, facilitating adaptation to electric drive bridge assemblies and eddy current retarders 5 of different widths. The retarder fixing bracket 35 also has strip-shaped connecting holes for direct connection to the eddy current retarder 5, facilitating adaptation to eddy current retarders 5 of different heights.

[0051] Reference Figure 6-9The wheel-side connecting fixture 6 includes a cylindrical wheel-side connecting cylinder 61. A coupling 62 is coaxially mounted inside the wheel-side connecting cylinder 61, and the coupling 62 is fixedly connected to the wheel-side connecting cylinder 61. The drive shaft of the eddy current retarder 5 is connected to the output shaft of the tested electric drive axle assembly 4 via the coupling 62. Annular hub mounting plates 63 and connecting plates 64 are fixedly connected to both ends of the wheel-side connecting cylinder 61, respectively. The wheel-side connecting cylinder 61 is coaxially arranged with the hub mounting plates 63 and connecting plates 64, and both ends of the coupling 62 are fixedly connected to the hub mounting plates 63 and connecting plates 64, respectively. The wheel-side connecting fixture 6 adopts a modular structure, allowing it to adapt to different models of electric drive axle assemblies and eddy current retarder 5 by replacing components, significantly improving its versatility.

[0052] The top of the stand body 1 is equipped with two cooling fans 7, each cooling fan 7 is associated with an eddy current retarder 5, and the orientation of each cooling fan 7 is aligned with the corresponding eddy current retarder 5.

[0053] The top of the test bench 1 is equipped with a motor controller 8, a host computer 9, a cooling water tank 010, a battery simulator 011, and a data signal acquisition unit 012. The motor controller 8 can be electrically connected to the electric drive bridge assembly 4 under test and the host computer 9. The cooling water tank 010 can dissipate heat for the electric drive bridge assembly 4 under test and the motor controller 8. The battery simulator 011 can be electrically connected to the electric drive bridge assembly 4 under test. The data signal acquisition unit 012 can be electrically connected to the thermocouple sensors installed on the electric drive bridge assembly 4 under test. Multiple thermocouple sensors are provided, which are respectively set on the bridge housing surface and internal bearings of the electric drive bridge. By arranging thermocouple sensors in key parts, the temperature can be monitored in real time, which is convenient for plotting temperature curves and judging the lubrication status of internal gears based on the lubricating oil temperature at different locations.

[0054] The working principle of this embodiment is as follows:

[0055] The two ends of the electric drive bridge assembly 4 under test are pressed between the leaf spring seat pressure plate 33 and the leaf spring support base 32 of the two middle mounting seats 3. The distance between the leaf spring seat pressure plate 33 and the leaf spring support base 32 is adjusted by the vertically set bolts to adapt to and fix the electric drive bridge assembly 4 under test. The eddy current retarder 5 is installed between the two corresponding retarder fixing brackets 35 of the horizontal mounting seats 3 to complete the installation of the test component and the load component.

[0056] The eddy current retarder 5 is connected to the electric drive axle assembly 4 under test using the wheel-side connecting fixture 6. The coupling 62 inside the cylindrical wheel-side connecting cylinder 61 in the wheel-side connecting fixture 6 connects the drive shaft of the eddy current retarder 5 to the output shaft of the electric drive axle assembly 4 under test. The annular wheel hub mounting plate 63 and connecting plate 64 at both ends of the wheel-side connecting cylinder 61 are respectively fitted and connected to the eddy current retarder 5 and the electric drive axle assembly 4 under test to ensure stable power transmission.

[0057] The control frame 21 is mounted on the longitudinal sides of the test bench body 1. The two rotating motors 013 are coaxial and longitudinally arranged, which drives the frame 21 to rotate around the longitudinal axis, thereby causing the inner platform 22 inside the frame 21 and the tested electric drive bridge assembly 4 and eddy current retarder 5 on the inner platform 22 to tilt laterally, simulating the tilting state of a real vehicle when it is turning.

[0058] The rotation motor 2015 installed on the outer wall of the horizontal side of the control frame 21 is operated. The output shaft of the rotation motor 2015 is coaxially connected to the rotating shaft 014 that runs through both sides of the horizontal side of the outer frame 21. The end of the rotating shaft 014 facing the inside of the outer frame 21 is fixed to the inner platform 22, which drives the inner platform 22 to rotate around the horizontal rotation axis, thereby making the tested electric drive bridge assembly 4 and the eddy current retarder 5 on the inner platform 22 longitudinally tilted, simulating the tilting state of the real vehicle when going up or down a slope.

[0059] The battery simulator 011 on the top of the test bench 1 is electrically connected to the electric drive axle assembly 4 under test, providing stable power to the electric drive axle assembly 4 under test and simulating the power supply of a real vehicle; the electric eddy current retarders 5 on both sides of the lateral side apply torque load to the electric drive axle assembly 4 under test through the wheel-side connecting fixture 6. By selecting different models of electric eddy current retarders 5 and different gears, different load conditions such as starting acceleration and climbing of a real vehicle can be simulated.

[0060] Two cooling fans 7 on the top of the test bench 1 are respectively directed at the corresponding eddy current retarders 5 to dissipate the heat generated by the eddy current retarders 5 during operation; the cooling water tank 010 is connected to the tested electric drive bridge assembly 4 and the motor controller 8 to dissipate heat for the internal operating parts of the tested electric drive bridge assembly 4 and the motor controller 8, so as to avoid the temperature from being too high and affecting the performance of the components and the condition of the lubricating oil.

[0061] The motor controller 8 is electrically connected to the tested electric drive bridge assembly 4 and the host computer 9. The host computer 9 controls the operating status of the tested electric drive bridge assembly 4 through the motor controller 8. The thermocouple sensor installed on the tested electric drive bridge assembly 4 is electrically connected to the data signal acquisition unit 012. The data signal acquisition unit 012 collects the temperature data of key parts of the tested electric drive bridge assembly 4 in real time. The staff judges the lubrication effect of the internal lubricating oil based on the temperature data and completes the tilt lubrication test.

[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test bench for tilt lubrication testing of an electric drive axle assembly, comprising a test bench body (1), characterized in that, The main body (1) of the platform is provided with a flipping platform (2). The flipping platform (2) includes an outer frame (21). An inner platform (22) is provided inside the outer frame (21) for rotation. The outer frame (21) can flip around a longitudinally arranged rotation axis, and the inner platform (22) can flip around a transversely arranged rotation axis. The inner platform (22) is provided with four mounting seats (3) arranged in a horizontal direction. The two mounting seats (3) in the middle can be used to install the electric drive bridge assembly (4) under test. The two mounting seats (3) on the two sides in the horizontal direction are equipped with eddy current retarders (5). The drive shafts of the two eddy current retarders (5) are coaxial and opposite to each other. The axis of the drive shaft of each eddy current retarder (5) is arranged in a horizontal direction. A wheel-side connecting fixture (6) is installed on the drive shaft of each eddy current retarder (5). Each wheel-side connecting fixture (6) can be connected to the electric drive bridge assembly (4) under test.

2. The test bench for tilt lubrication testing of an electric drive axle assembly according to claim 1, characterized in that, The top of the stand body (1) is provided with two cooling fans (7), each cooling fan (7) is associated with an eddy current retarder (5), and the orientation of each cooling fan (7) is aligned with the corresponding eddy current retarder (5).

3. The test bench for tilt lubrication testing of an electric drive axle assembly according to claim 1, characterized in that, The top of the test bench (1) is equipped with a motor controller (8), a host computer (9), a heat sink (010), a battery simulator (011), and a data signal acquisition unit (012). The motor controller (8) can be electrically connected to the electric drive bridge assembly (4) under test and the host computer (9). The heat sink (010) can dissipate heat for the electric drive bridge assembly (4) under test and the motor controller (8). The battery simulator (011) can be electrically connected to the electric drive bridge assembly (4) under test. The data signal acquisition unit (012) can be electrically connected to the thermocouple sensor installed on the electric drive bridge assembly (4) under test.

4. The test bench for tilt lubrication testing of an electric drive bridge assembly according to claim 1, characterized in that, The top surface of the platform body (1) has a flip groove (11), and the flip platform (2) is located in the flip groove (11).

5. The test bench for tilt lubrication testing of an electric drive axle assembly according to claim 1, characterized in that, A flip motor (013) is provided on both sides of the longitudinal direction of the outer frame (21). The flip motor (013) is installed on the frame body (1). The two flip motors (013) are arranged opposite to each other. The axis of the output shaft of the two flip motors (013) is coaxial along the longitudinal direction. The output shaft of the two flip motors (013) is connected to the outer wall of the outer frame (21).

6. The test bench for tilt lubrication testing of an electric drive bridge assembly according to claim 1, characterized in that, The outer frame (21) has a rotating shaft (014) running through both sides in the horizontal direction. The axis of the rotating shaft (014) is set in the horizontal direction. The rotating shaft (014) is rotatably connected to the outer frame (21). One end of the rotating shaft (014) facing the inside of the outer frame (21) is fixedly connected to the inner platform (22). One end of the rotating shaft (014) facing the outside of the outer frame (21) is coaxially connected to the output shaft of the second flip motor (015). The second flip motor (015) is installed on the outer wall of the outer frame (21).

7. The test bench for tilt lubrication testing of an electric drive bridge assembly according to claim 1, characterized in that, The two mounting bases (3) located in the middle each include a base pressure plate (31). The base pressure plate (31) is installed on the top of the inner platform (22). Each of the two base pressure plates (31) is provided with two leaf spring support bases (32) arranged in the longitudinal direction. The top of the two leaf spring support bases (32) is connected to a leaf spring seat pressure plate (33). The leaf spring seat pressure plate (33) and the leaf spring support base (32) are connected by vertically arranged bolts. The two ends of the electric drive bridge assembly (4) under test can be pressed between the leaf spring seat pressure plate (33) and the leaf spring support base (32).

8. The test bench for tilt lubrication testing of an electric drive bridge assembly according to claim 1, characterized in that, The two mounting bases (3) located on the horizontal sides each include a base plate (34). The base plate (34) is installed on the top of the inner platform (22). Each of the two base plates (34) is provided with two retarder fixing brackets (35) arranged in the longitudinal direction. The eddy current retarder (5) is installed between the two corresponding retarder fixing brackets (35).

9. A test bench for tilt lubrication testing of an electric drive axle assembly according to claim 1, characterized in that, The wheel-side connecting fixture (6) includes a cylindrical wheel-side connecting cylinder (61). A coupling (62) is coaxially provided inside the wheel-side connecting cylinder (61). The coupling (62) is fixedly connected to the wheel-side connecting cylinder (61). The drive shaft of the eddy current retarder (5) is connected to the output shaft of the electric drive bridge assembly (4) under test through the coupling (62).

10. A test bench for tilt lubrication testing of an electric drive axle assembly according to claim 9, characterized in that, The wheel-side connecting cylinder (61) is fixedly connected to the two ends of the wheel-side connecting cylinder (61) with the annular wheel hub mounting plate (63) and the connecting plate (64) respectively. The wheel-side connecting cylinder (61) is coaxially arranged with the wheel hub mounting plate (63) and the connecting plate (64). The two ends of the coupling (62) are fixedly connected to the wheel hub mounting plate (63) and the connecting plate (64) respectively.

Images