A testing device for an electric motor of an electric vehicle

Abstract

The utility model relates to electric motor -cycle motor testing technical field, concretely discloses a kind of testing device for electric motor -cycle motor, wherein, first motor and second motor are all arranged on test table, sprocket set includes at least two first tooth disc, chain and second tooth disc, the outer diameter and the number of teeth of each first tooth disc are different, and each first tooth disc is sequentially superposed, chain is selectively sleeved in any first tooth disc and second tooth disc, at least two first tooth discs are fixedly installed in the output end of first motor, second tooth disc is fixedly installed in the output end of second motor. Drag test is carried out using double motor, first motor is operated in torque mode as drag motor, second motor is operated in speed mode as load machine, different first tooth disc can be replaced to cooperate with second tooth disc to simulate test scene under different working conditions, and corresponding dynamic load is applied to complete the torsional force test of second motor, effectively improve the accuracy and authenticity of motor test.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle motor testing technology, and in particular to a testing device for electric vehicle motors. Background Technology

[0002] Electric two-wheelers, as an important tool for solving the "last mile" problem of short-distance urban transportation, have been widely used in people's daily lives due to their flexibility, convenience, and economy. The performance, efficiency, and reliability of their core powertrain—the drive motor—directly determine the vehicle's range, climbing ability, acceleration performance, and rider experience. Therefore, comprehensive, accurate, and reliable testing and verification of the motor is crucial at every stage of motor research and development, production, and installation.

[0003] Current torque testing for electric vehicle motors mostly employs a single-motor-driven load method, primarily using the motor to power equipment such as a dynamometer. This approach presents a limited range of testing scenarios that differ significantly from the actual operating conditions of electric vehicles, resulting in limited data value for practical applications. Specifically, this method typically considers only the motor's performance under specific load conditions, neglecting the motor's actual operating status under varying road conditions, speeds, and driving modes. Consequently, the test results may not fully reflect the motor's performance in complex environments, thus impacting the accuracy and reliability of motor performance evaluations.

[0004] Therefore, there is an urgent need for a testing device for electric vehicle motors to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a testing device for electric vehicle motors, which can effectively improve the accuracy and authenticity of motor testing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a testing device for electric vehicle motors, comprising:

[0008] Test bench;

[0009] Both the first motor and the second motor are mounted on the test bench;

[0010] A sprocket assembly includes at least two first sprockets, a chain, and a second sprocket. Each first sprocket has a different outer diameter and number of teeth, and the first sprockets are stacked sequentially. The chain can be selectively fitted onto any one of the first sprockets and the second sprocket. At least two first sprockets are fixedly installed at the output end of the first motor, and the second sprocket is fixedly installed at the output end of the second motor.

[0011] As a preferred embodiment of the above-mentioned testing device for electric vehicle motors, the testing device for electric vehicle motors further includes a vibrator, which is configured to drive the test bench to vibrate.

[0012] As a preferred technical solution of the above-mentioned testing device for electric vehicle motors, the testing device for electric vehicle motors further includes a support plate and several support legs. The several support legs are fixedly connected to the bottom end of the support plate. The test platform is fixedly installed on the support plate, and the test platform and the support plate are arranged at intervals to form an accommodating space. The vibrator is placed in the accommodating space.

[0013] As a preferred technical solution for the above-mentioned testing device for electric vehicle motors, the vibrator is a cylinder.

[0014] As a preferred technical solution of the above-mentioned testing device for electric vehicle motors, the cylinder is fixedly mounted on the support plate, and the output end of the cylinder is connected to the bottom end of the test bench, and can drive the test bench to vibrate.

[0015] As a preferred technical solution of the above-mentioned testing device for electric vehicle motors, the testing device for electric vehicle motors further includes a first drive controller and a second drive controller, wherein the first drive controller and the second drive controller are respectively communicatively connected to the first motor and the second motor.

[0016] As a preferred technical solution of the above-mentioned testing device for electric vehicle motors, the testing device for electric vehicle motors further includes a main control unit, which is communicatively connected to the first drive controller and the second drive controller.

[0017] As a preferred technical solution of the above-mentioned testing device for electric vehicle motors, the testing device for electric vehicle motors further includes a tensioning mechanism, which includes a support frame and a tensioning wheel. The support frame is fixedly mounted on the test platform, the tensioning wheel is rotatably connected to the support frame, and the tensioning wheel abuts against the chain to maintain a constant tension force on the chain.

[0018] As a preferred technical solution of the above-mentioned testing device for electric vehicle motors, the testing device for electric vehicle motors further includes a first bracket, which is fixedly connected between the first motor and the test bench.

[0019] As a preferred technical solution of the above-mentioned testing device for electric vehicle motors, the testing device for electric vehicle motors further includes a second bracket, which is fixedly connected between the second motor and the test bench.

[0020] The beneficial effects of this utility model are as follows:

[0021] This invention provides a testing device for electric vehicle motors. The device includes a test bench, a first motor, a second motor, and a sprocket assembly. Both the first and second motors are mounted on the test bench. The sprocket assembly includes at least two first sprockets, a chain, and a second sprocket. Each first sprocket has a different outer diameter and number of teeth, and they are stacked sequentially. The chain can be selectively engaged with any of the first and second sprockets. At least two first sprockets are fixedly mounted on the output end of the first motor, and the second sprocket is fixedly mounted on the output end of the second motor. This configuration allows for dual-motor (first and second motors) towing tests. The first motor operates as the tractor in torque mode, while the second motor operates as the load in speed mode. During actual testing, different first sprockets can be used in conjunction with the second sprocket to simulate different operating conditions and apply corresponding dynamic loads to complete the torque test of the second motor. This conforms to the real operating conditions of electric vehicle motors and effectively improves the accuracy and authenticity of motor testing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the testing device for electric vehicle motors provided by this utility model.

[0023] in:

[0024] 1. Test bench; 2. First motor; 3. Second motor; 4. First gear chain; 5. Chain; 6. Second gear chain; 7. Vibrator; 8. Support plate; 9. Support leg; 10. Support frame; 11. Tensioner; 12. First bracket; 13. Second bracket. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0027] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1As shown, this embodiment provides a testing device for electric vehicle motors. The testing device for electric vehicle motors includes: a test bench 1, a first motor 2, a second motor 3, and a sprocket assembly. The first motor 2 and the second motor 3 are both mounted on the test bench 1. The sprocket assembly includes at least two first sprockets 4, a chain 5, and a second sprocket 6. The outer diameter and number of teeth of each first sprocket 4 are different, and the first sprockets 4 are stacked sequentially. The chain 5 can be selectively fitted onto any first sprocket 4 and any second sprocket 6. At least two first sprockets 4 are fixedly installed at the output end of the first motor 2, and the second sprocket 6 is fixedly installed at the output end of the second motor 3. With this setup, a dual-motor (first motor 2 and second motor 3) system is used for towing tests. The first motor 2 operates as the tractor in torque mode, while the second motor 3 operates as the load in speed mode. In actual testing, different first chainrings 4 can be used in conjunction with the second chainrings 6 to simulate test scenarios under different working conditions, and corresponding dynamic loads can be applied to complete the torque test of the second motor 3. This system conforms to the real operating conditions of electric vehicle motors and can effectively improve the accuracy and authenticity of motor testing.

[0031] Optionally, the testing apparatus for the electric vehicle motor also includes a vibrator 7, which is configured to drive the test bench 1 to vibrate. This configuration allows the vibrator 7 to drive the test bench 1 to vibrate, further simulating road bumps during electric vehicle operation and improving the realism of the test results.

[0032] Optionally, the testing device for electric vehicle motors also includes a support plate 8 and several support legs 9. The support legs 9 are fixedly connected to the bottom of the support plate 8. The test platform 1 is fixedly mounted on the support plate 8, and the test platform 1 and the support plate 8 are arranged at intervals to form an accommodating space. The vibrator 7 is placed within the accommodating space. This arrangement, by housing the vibrator 7 within the "accommodating space" formed by the test platform 1 and the support plate 8, greatly saves external space, making the entire device very compact and highly integrated, further optimizing the spatial layout and improving space utilization.

[0033] Specifically, this embodiment provides the following exemplary technical solution: the vibrator 7 is a cylinder, which is fixedly mounted on the support plate 8, and the output end of the cylinder is connected to the bottom end of the test bench 1, enabling the test bench 1 to vibrate. With this configuration, the vibrator 7 is positioned at the bottom, effectively lowering the center of gravity of the entire device. This is crucial in counteracting the swaying and overturning moments caused by the vibration itself, significantly enhancing the overall stability, safety, and reliability of the device during vibration testing.

[0034] Optionally, the testing device for electric vehicle motors further includes a first drive controller and a second drive controller, which are respectively communicatively connected to the first motor 2 and the second motor 3.

[0035] Furthermore, the testing device for electric vehicle motors also includes a main control unit, which is communicatively connected to both the first drive controller and the second drive controller. With this configuration, the main control unit can control the first drive controller to drive the first motor 2 in torque mode, while simultaneously controlling the second drive controller to drive the second motor 3 in speed mode, so that the first motor 2 applies a simulated load to the second motor 3, further ensuring testing accuracy.

[0036] Optionally, in order to prevent the chain 5 from becoming loose or other defects during the test and to ensure the smoothness of the test process, the test device for electric vehicle motors also includes a tensioning mechanism. The tensioning mechanism includes a support frame 10 and a tension wheel 11. The support frame 10 is fixedly mounted on the test bench 1, and the tension wheel 11 is rotatably connected to the support frame 10. The tension wheel 11 abuts against the non-working section of the chain 5 to maintain a constant tension force on the chain 5.

[0037] Furthermore, the tensioning mechanism also includes an elastic element configured to apply force to the support frame 10, so that the tensioning wheel 11 always elastically abuts against the chain 5 to automatically compensate for wear, elongation or jump of the chain 5. This structure can automatically adapt to the wear and elongation of the chain 5, keeping the tension at its optimal state without manual intervention, and is particularly suitable for long-term durability testing.

[0038] In this embodiment, in order to improve the connection stability and reliability of the first motor 2, the testing device for the electric vehicle motor also includes a first bracket 12, which is fixedly connected between the first motor 2 and the test bench 1.

[0039] Optionally, in order to improve the connection stability and reliability of the second motor 3, the testing device for the electric vehicle motor also includes a second bracket 13, which is fixedly connected between the second motor 3 and the test bench 1.

[0040] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A testing device for electric vehicle motors, characterized in that, include: Test bench (1); The first motor (2) and the second motor (3) are both mounted on the test bench (1); The sprocket assembly includes at least two first sprockets (4), a chain (5), and a second sprocket (6). The outer diameter and number of teeth of each first sprocket (4) are different, and the first sprockets (4) are stacked in sequence. The chain (5) can be selectively fitted onto any one of the first sprockets (4) and the second sprocket (6). At least two first sprockets (4) are fixedly installed at the output end of the first motor (2), and the second sprocket (6) is fixedly installed at the output end of the second motor (3).

2. The testing device for electric vehicle motors according to claim 1, characterized in that, The testing apparatus for electric vehicle motors also includes a vibrator (7) configured to drive the test bench (1) to vibrate.

3. The testing device for electric vehicle motors according to claim 2, characterized in that, The testing device for electric vehicle motors also includes a support plate (8) and several support legs (9). Several support legs (9) are fixedly connected to the bottom end of the support plate (8). The test platform (1) is fixedly installed on the support plate (8), and the test platform (1) and the support plate (8) are arranged at intervals to form an accommodating space. The vibrator (7) is placed in the accommodating space.

4. The testing device for electric vehicle motors according to claim 3, characterized in that, The vibrator (7) is a cylinder.

5. The testing device for electric vehicle motors according to claim 4, characterized in that, The cylinder is fixedly installed on the support plate (8), and the output end of the cylinder is connected to the bottom end of the test bench (1) and can drive the test bench (1) to vibrate.

6. The testing apparatus for electric vehicle motors according to any one of claims 1-5, characterized in that, The testing device for electric vehicle motors further includes a first drive controller and a second drive controller, which are respectively communicatively connected to the first motor (2) and the second motor (3).

7. The testing apparatus for electric vehicle motors according to claim 6, characterized in that, The testing device for electric vehicle motors also includes a main control unit, which is communicatively connected to the first drive controller and the second drive controller.

8. The testing apparatus for electric vehicle motors according to any one of claims 1-5, characterized in that, The testing device for electric vehicle motors also includes a tensioning mechanism, which includes a support frame (10) and a tensioning wheel (11). The support frame (10) is fixedly mounted on the test bench (1), and the tensioning wheel (11) is rotatably connected to the support frame (10) and abuts against the chain (5) to maintain a constant tension on the chain (5).

9. The testing apparatus for electric vehicle motors according to any one of claims 1-5, characterized in that, The testing device for electric vehicle motors also includes a first bracket (12), which is fixedly connected between the first motor (2) and the test bench (1).

10. The testing apparatus for electric vehicle motors according to any one of claims 1-5, characterized in that, The testing device for electric vehicle motors also includes a second bracket (13), which is fixedly connected between the second motor (3) and the test bench (1).

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