Electric drive assembly experiment bench capable of loading in radial direction

Abstract

An electric drive assembly experiment bench capable of radial loading comprises a fixing support used for fixing an electric drive assembly and a radial loading supporting assembly used for supporting the output end of the electric drive assembly. The radial loading and supporting assembly comprises a supporting frame, a bearing seat arranged on the supporting frame in a guiding and matching mode in the vertical direction, a rolling bearing assembled on the bearing seat and a hydraulic loading piece capable of stretching out and drawing back in the vertical direction, the hydraulic loading piece is arranged in the supporting frame, the bearing seat is supported on the hydraulic loading piece, and the output end of the electric driving assembly is supported on the rolling bearing. And the hydraulic loading piece rotates on the rolling bearing along with the operation of the electric driving assembly and forms a radial load along with the extension of the hydraulic loading piece. According to the utility model, radial loading can be carried out on the output end of the electric drive assembly in the experiment process, a dynamic radial load is applied to the electric drive assembly according to the actual operation condition, and the conditions of the whole vehicle load and road bumping are simulated, so that the load of the electric drive assembly in the experiment process is dynamically changed, and the reliability and the accuracy of the experiment are improved.

Description

Technical Field

[0001] The utility model relates to an experimental bench for an electric drive assembly with radial loading, belonging to the technical field of electric drive assembly testing. Background Technique

[0002] As the "heart" of new energy vehicles, the electric drive assembly plays the roles of the "engine, vehicle control unit, and transmission" in fuel vehicles and has a great impact on the overall performance of new energy vehicles. According to the current testing standards of major domestic and foreign automobile manufacturers and third-party suppliers, the electric drive assembly usually needs to undergo durability and reliability tests for up to thousands of hours. The counter-rotating experiment is widely used for the dynamic simulation of power generation equipment, electric drive equipment, and mechanical drive equipment and undertakes the durability and reliability testing tasks of the electric drive assembly. Currently, the general counter-rotating test of the electric drive assembly generally uses two dynamometers on the left and right for counter-rotation, and the tested power assembly is connected through a rigid half shaft. During the counter-rotating experiment, the experimental load of the electric drive assembly is a fixed value. However, since the vehicle load and road surface bumpiness change during vehicle driving, the working load of the electric drive assembly is a dynamic load. Moreover, when the electric drive assembly is running, it is simultaneously affected by rotational resistance and radial resistance. The current counter-rotating loading method ignores the radial load, which is inconsistent with the actual working conditions, and the reliability and accuracy of the experiment need to be improved. Content of the Utility Model

[0003] The experimental bench for an electric drive assembly with radial loading provided by the utility model can perform radial loading on the output end of the electric drive assembly during the experiment, apply dynamic radial loads to the electric drive assembly according to the actual operating conditions, simulate the vehicle load and road surface bumpiness, make the load-bearing of the electric drive assembly during the experiment change dynamically, simulate the actual load-bearing process, and improve the reliability and accuracy of the experiment.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The experimental bench for an electric drive assembly with radial loading includes a fixed bracket for fixing the electric drive assembly and a radial loading support assembly for supporting the output end of the electric drive assembly. It is characterized in that: the radial loading support assembly includes a support frame, a bearing seat vertically and guidingly fitted on the support frame, a rolling bearing assembled on the bearing seat, and a hydraulically loaded member that can be telescopically extended vertically. The hydraulically loaded member is placed inside the support frame, the bearing seat is supported on the hydraulically loaded member, the output end of the electric drive assembly is supported on the rolling bearing, rotates on the rolling bearing as the electric drive assembly operates, and forms a radial load as the hydraulically loaded member extends.

[0006] Preferably, the support frame includes a horizontally arranged bottom plate and columns vertically fixed on the bottom plate. The number of columns is two. The bearing seat is installed between the two columns and is in guiding cooperation with the columns. Two horizontally aligned mounting shafts are fixed on the bearing seat, and rolling bearings are assembled on the mounting shafts.

[0007] Preferably, the hydraulic loading member includes a hydraulic cylinder vertically placed on the bottom plate and a radial loading head installed at the upper end of the hydraulic cylinder. The bearing seat is supported on the radial loading head.

[0008] Preferably, the connecting ear at the upper end of the hydraulic cylinder is connected to the sensor seat through a connecting pin. A tension-compression sensor is fixed on the sensor seat. The radial loading head is T-shaped, with the lower end extending into the tension-compression sensor and the upper end supporting the bearing seat.

[0009] Preferably, the output end of the electric drive assembly is connected to the mounting cylinder through a transfer flange. The mounting cylinder has a convex ring, and the convex ring is supported on the rolling bearing. A groove corresponding to the rolling bearing is opened on the convex ring, and the rolling bearing extends into the groove.

[0010] The beneficial effects of the present utility model are as follows:

[0011] For the experimental bench of the radially loadable electric drive assembly of the present utility model, the fixed bracket fixes the electric drive assembly, and the radial loading support assembly supports the output end of the electric drive assembly. By connecting the output ends of the electric drive assemblies on two experimental benches with a rigid half shaft, a counter-rotating experiment can be carried out. Also, a radial loading experiment can be carried out on the electric drive assembly during operation using a single experimental bench, or a radial load can be applied to the electric drive assembly during the counter-rotating experiment. The hydraulic loading member in the radial loading support assembly can radially load the output end of the electric drive assembly during the experiment, apply a dynamic radial load to the electric drive assembly according to the actual operating conditions, simulate the vehicle load and road surface bumps, make the load borne by the electric drive assembly change dynamically during the experiment, simulate the actual loading process, and improve the reliability and accuracy of the experiment. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the experimental bench of the radially loadable electric drive assembly in the specific embodiment.

[0013] Figure 2 It is a cross-sectional view of the mounting cylinder supported on the radial loading support assembly.

[0014] Figure 3 It is another cross-sectional view of the mounting cylinder supported on the radial loading support assembly. Specific Embodiment

[0015] The following Figures 1 to 3 makes a detailed description of the embodiments of the present utility model.

[0016] A radially loadable test bench for an electric drive assembly, comprising a fixing bracket 1 for fixing the electric drive assembly 100 and a radially loading support assembly 2 for supporting the output end of the electric drive assembly. It is characterized in that: the radially loading support assembly 2 includes a support frame 3, a bearing seat 4 vertically and guidingly fitted on the support frame 3, a rolling bearing 5 assembled on the bearing seat 4, and a hydraulically loading member 6 that can telescopically extend vertically. The hydraulically loading member 6 is placed inside the support frame 3, the bearing seat 4 is supported on the hydraulically loading member 6, the output end of the electric drive assembly 100 is supported on the rolling bearing 5, rotates on the rolling bearing 5 as the electric drive assembly 100 operates, and forms a radial load as the hydraulically loading member 6 extends.

[0017] For the above-mentioned radially loadable test bench for an electric drive assembly, the fixing bracket 1 fixes the electric drive assembly 100, and the radially loading support assembly 2 supports the output end of the electric drive assembly 100. By connecting the output ends of the electric drive assemblies 100 on two test benches with a rigid half shaft, a counter-traction test can be carried out. Also, a single test bench can be used to conduct a radial loading test on the electric drive assembly 100 during operation, or a radial loading can be carried out on the electric drive assembly 100 during the counter-traction test. The hydraulically loading member 6 in the radially loading support assembly 2 can radially load the output end of the electric drive assembly 100 during the test, apply a dynamic radial load to the electric drive assembly according to the actual operating conditions, simulate the vehicle load and road surface bumps, make the load borne by the electric drive assembly during the test change dynamically, simulate the actual loading process, and improve the reliability and accuracy of the test.

[0018] Among them, the support frame 3 includes a horizontally arranged bottom plate 31 and vertical columns 32 fixed on the bottom plate 31. The number of columns 32 is two. The bearing seat 4 is installed between the two columns 32 and is guidingly fitted with the columns 32. Two horizontally aligned mounting shafts 41 are fixed on the bearing seat 4, and the rolling bearing 5 is assembled on the mounting shafts 41. The columns 32 play a guiding role for the bearing seat 4, enabling the bearing seat 4 to move only vertically under the drive of the hydraulically loading member 6 without skewing, ensuring the support reliability of the rolling bearing 5 for the output end of the electric drive assembly.

[0019] Among them, the hydraulically loading member 6 includes a hydraulic cylinder 61 vertically placed on the bottom plate 31 and a radial loading head 62 installed at the upper end of the hydraulic cylinder 61. The bearing seat 4 is supported on the radial loading head 62. The radial loading head 62 transmits the vertical load of the hydraulic cylinder to the bearing seat 4, and the bearing seat 4 transmits the vertical load to the output end of the electric drive assembly through the rolling bearing 5.

[0020] Among them, the connecting ear at the upper end of the hydraulic cylinder 61 is connected to the sensor seat 63 through a connecting pin. A tension and compression sensor 64 is fixed on the sensor seat 63. The radial loading head 62 is in a T shape, with the lower end extending into the tension and compression sensor 64 and the upper end supporting the bearing seat 4. The loading load of the hydraulic cylinder 61 is measured in real time through the tension and compression sensor 64, so as to adjust the radial load on the output end of the electric drive assembly according to the actual working conditions, form a dynamic load, simulate the vehicle load and road surface bumps, make the load borne by the electric drive assembly change dynamically during the experiment, simulate the actual loading process, and improve the reliability and accuracy of the experiment.

[0021] Among them, the output end of the electric drive assembly 100 is connected to the mounting cylinder 7 through a transfer flange 6. The mounting cylinder 7 has a convex ring 71, and the convex ring 71 is supported on a rolling bearing. A groove 72 corresponding to the rolling bearing 5 is formed on the convex ring 71, and the rolling bearing 5 extends into the groove 72. The mounting cylinder 7 is equivalent to a simulated tire installed on the output end of the electric drive assembly and rotates with the operation of the electric drive assembly. Through the cooperation between the rolling bearing 5 and the groove 72, the mounting cylinder 7 is accurately supported on the rolling bearing 5, and the axial displacement of the mounting cylinder 7 is limited during the experiment through the cooperation between the groove 72 and the rolling bearing 5, avoiding excessive axial movement of the mounting cylinder 7.

[0022] The technical solutions of the embodiments of the present invention are completely described above in conjunction with the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

Claims

1. A radially loadable electric drive assembly test bench, comprising a fixed bracket for fixing the electric drive assembly and a radial loading support assembly for supporting the output end of the electric drive assembly, characterized in that: The radial loading support assembly includes a support frame, a bearing seat mounted on the support frame along a vertical guide, a rolling bearing assembled on the bearing seat, and a hydraulic loader that can be extended and retracted vertically. The hydraulic loader is placed in the support frame, the bearing seat is supported on the hydraulic loader, and the output end of the electric drive assembly is supported on the rolling bearing. It rotates on the rolling bearing as the electric drive assembly runs, and a radial load is formed as the hydraulic loader extends.

2. The radially loadable electric drive assembly test bench according to claim 1, characterized in that The support frame includes a horizontally arranged base plate and columns vertically fixed on the base plate. There are two columns. The bearing seat is installed between the two columns and cooperates with the column guide. Two horizontally aligned installation shafts are fixed on the bearing seat, and the rolling bearing is assembled on the installation shaft.

3. The radially loadable electric drive assembly test bench according to claim 2, characterized in that: The hydraulic loading component comprises a hydraulic oil cylinder vertically arranged on the bottom plate and a radial loading head mounted on the upper end of the hydraulic oil cylinder, and the bearing seat is supported on the radial loading head.

4. The radially loadable electric drive assembly test bench according to claim 3, characterized in that: The connecting ear at the upper end of the hydraulic cylinder is connected to the sensor seat through a connecting pin, and the tension and compression sensor is fixed on the sensor seat. The radial loading head is T-shaped, with the lower end extending into the tension and compression sensor and the upper end supporting the bearing seat.

5. The radially loadable electric drive assembly test bench according to claim 1, characterized in that: The output end of the electric drive assembly is connected to the mounting tube through an adapter flange. The mounting tube is provided with a convex ring, which is supported on a rolling bearing. A groove corresponding to the rolling bearing is provided on the convex ring, and the rolling bearing extends into the groove.

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