A new energy automobile electromechanical coupling mechanism test bench

Abstract

The application belongs to the technical field of new energy vehicles, and particularly discloses a new energy vehicle electromechanical coupling mechanism test bench, which comprises an operating table, which is used for placing a hub motor to be detected, and a control cabinet arranged on one side of the operating table; a fixing device is installed on the top of the operating table and used for fixing the hub motor; and a driving device is installed on the top of the operating table and used for driving the hub motor to rotate for detection. The connecting assembly is arranged, when the servo motor stops, the electromagnet can be in a power-off state, at this time, the clamping block can be separated from the clamping groove under the action of the reset spring, so that the connecting shaft and the driving shaft are kept disconnected, at this time, the hub motor can continue to drive the connecting shaft to idle under the action of its own inertia until it gradually stops, thereby avoiding the influence of the torque generated by the output shaft of the hub motor on the driving shaft, the coupling and various test components of the application when it suddenly stops, and prolonging the service life of various experimental components.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicle technology, and in particular relates to a test bench for electromechanical coupling mechanism of new energy vehicles. Background Technology

[0002] The electromechanical coupling mechanism test bench for new energy vehicles is an integrated, high-precision laboratory testing platform. Its core function is to simulate, reproduce, and quantify the dynamic coupling relationship of multiple physical fields in the "electric-mechanical-control" power system of new energy vehicles. Its test data has important guiding significance for the research and development optimization of new energy vehicle power systems.

[0003] In the electromechanical coupling mechanism test of hub motors for new energy vehicles, the hub motors need to undergo high-frequency start-stop and commutation operations to simulate actual working conditions. However, in the transmission structure of existing test benches, components such as drive shafts, couplings, and bearings are prone to fatigue wear under high-frequency start-stop, commutation, and torque impact. This problem directly leads to the test bench needing frequent replacement of worn parts and maintenance, which not only significantly increases the material and labor costs of the test, but also interrupts the test process due to equipment downtime, reducing the overall test efficiency and making it difficult to meet the high-frequency and continuous requirements of hub motor electromechanical coupling characteristic testing.

[0004] To address the aforementioned technical issues, this invention presents a test bench for the electromechanical coupling mechanism of new energy vehicles. By optimizing the transmission connection structure and adding vibration damping and buffer components, it effectively reduces component wear, decreases maintenance frequency, and simultaneously improves the test bench's testing accuracy and stability. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a test bench for the electromechanical coupling mechanism of new energy vehicles, thereby solving one of the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a test bench for the electromechanical coupling mechanism of new energy vehicles, comprising: The control panel is used to place the hub motor to be tested, and a control cabinet is set on one side of the control panel. A fixing device is installed on the top of the operating table to fix the hub motor; A drive unit, installed on the top of the operating platform, is used to drive the hub motor for rotation detection. The drive unit includes a power component, a connecting component, and a vibration damping component. The power component provides power for the rotation of the hub motor. The connecting component connects the hub motor and the power component to enable quick connection between the power component and the hub motor. The vibration damping component is located between the hub motor and the connecting component to absorb the vibration generated when the hub motor rotates.

[0007] Furthermore, the fixing device includes a hub rotation locking assembly and a mounting bracket. There are two hub rotation locking assemblies, which are symmetrically arranged on the front and rear sides of the hub motor. The mounting bracket is slidably mounted on the top of the operating platform, and the mounting bracket is located on the side of the hub motor away from the drive device. The mounting bracket is directly opposite the drive device, and the direction of movement of the mounting bracket is parallel to the axis of the drive device.

[0008] Furthermore, the power assembly includes a servo motor, a worm gear reducer, an eddy current dynamometer, a torque sensor, and a drive shaft. The servo motor is mounted on the top of the operating platform. The worm gear reducer is connected to the output shaft of the servo motor. The eddy current dynamometer and the torque sensor are sequentially connected to the output shaft of the worm gear reducer. The drive shaft and the torque sensor are connected via a coupling. The servo motor, worm gear reducer, eddy current dynamometer, torque sensor, and drive shaft are all connected to the top of the operating platform by a fixed bracket.

[0009] Furthermore, the connecting assembly includes a connecting shaft, a plug rod, and an electromagnetic locking mechanism. The connecting shaft is located at the end of the drive shaft near the hub motor, and a connecting hole for connecting the hub motor output shaft is provided at the position directly opposite the hub motor. The plug rod is cylindrical and is fixedly connected to the axis of the connecting shaft at the end away from the hub motor. A plug hole is provided at the axis of the free end of the drive shaft, and the plug rod is slidably inserted into the plug hole. A mounting hole coaxial with the plug hole is provided on the hole wall directly opposite the plug rod. The electromagnetic locking mechanism is installed in the mounting hole and is used to realize the synchronous rotation of the connecting shaft and the drive shaft when the servo motor is powered on.

[0010] Furthermore, the electromagnetic locking mechanism includes a magnetic block, an electromagnet, and a return spring. The magnetic block is slidably installed in the mounting hole along the axis of the drive shaft. The electromagnet is located on the side of the magnetic block away from the insertion rod. When the electromagnet is energized, its magnetic poles are the same as those on the side of the magnetic block facing it. The electromagnet is fixedly connected to the inner wall of the mounting hole. The return spring is sleeved on the outside of the electromagnet. One end of the return spring is fixedly connected to the magnetic block, and the other end of the return spring is fixedly connected to the inner wall of the mounting hole. Several locking blocks are fixedly connected to the side of the magnetic block away from the electromagnet, and the multiple locking blocks are evenly distributed in a ring. The end of the insertion rod facing the locking blocks has a slot matching the number of locking blocks, and the multiple locking blocks can be respectively locked into the multiple slots.

[0011] Furthermore, the vibration damping assembly includes a connecting sleeve, a movable sleeve, a compression spring, a vibration damping mechanism, and a compression mechanism. The connecting sleeve is sleeved around the periphery of the drive shaft, the drive shaft is located at the axis of the connecting sleeve, and the end of the connecting sleeve away from the connecting shaft is fixedly connected to an adjacent fixed bracket. The movable sleeve is located on the side of the connecting sleeve close to the connecting shaft, and the connecting shaft is located at the axis of the movable sleeve. An annular protrusion is provided at the end of the movable sleeve close to the connecting sleeve, and the annular protrusion is slidably inserted into the inner side of the connecting sleeve. The compression spring is sleeved on the outer side of the annular protrusion, and both ends of the compression spring are fixedly connected to the connecting sleeve and the movable sleeve, respectively. There are multiple vibration damping mechanisms, which are evenly distributed in a ring on the inner side of the movable sleeve, and the vibration damping mechanisms can fit against the surface of the connecting shaft. The compression mechanism is connected to the side of the movable sleeve away from the connecting sleeve and is used to compress the hub motor.

[0012] Furthermore, the vibration damping mechanism includes a push rod, a damping spring, and a ball bearing. The push rod is vertically slidably inserted into the inner wall of the movable sleeve. The damping spring is fixedly connected between the end of the push rod away from the connecting shaft and the inside of the movable sleeve. The ball bearing is rotatably installed at the end of the push rod away from the damping spring, and the ball bearing can always maintain contact with the surface of the connecting shaft under the pressure of the damping spring on the push rod.

[0013] Furthermore, the clamping mechanism includes a pressure ring and connecting rods. The pressure ring is located on the side of the movable sleeve closer to the hub motor. The pressure ring and the movable sleeve are coaxial, and the diameter of the pressure ring is smaller than the diameter of the hub motor. There are multiple connecting rods, which are evenly and fixedly connected between the movable sleeve and the pressure ring.

[0014] Furthermore, a deflection ring coaxial with the pressure ring is provided on the side of the pressure ring near the hub motor. A first spherical ring and a second spherical ring coaxial with the deflection ring are fixedly connected to the opposite side of the pressure ring and the deflection ring, respectively. The first spherical ring and the second spherical ring are rotatably engaged together. A connecting spring is fixedly connected between the pressure ring and the deflection ring.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention, by providing a connecting component, allows the electromagnet to be de-energized when the servo motor stops. At this time, the tension of the return spring on the magnetic block can cause the locking block to separate from the locking slot, thereby keeping the connecting shaft disconnected from the drive shaft. Under its own inertia, the hub motor can continue to drive the connecting shaft to rotate until it gradually stops, thus avoiding the impact of the torque generated instantaneously by the hub motor output shaft on the drive shaft, coupling, and various test components of this invention when suddenly stopped, and extending the service life of each test component. 2. This invention incorporates a vibration damping mechanism. During the rotation of the connecting shaft, if radial vibration occurs, the connecting shaft will compress the ball bearings. The ball bearings will push the push rod to slide into the movable sleeve, compressing the damping spring. The elastic deformation of the damping spring can absorb the impact force generated by the vibration of the connecting shaft. At the same time, the ball bearings roll into contact with the surface of the connecting shaft, reducing the friction between the connecting shaft and the vibration damping mechanism, preventing wear of the connecting shaft caused by vibration, effectively reducing vibration during the rotation of the connecting shaft, and reducing the impact of vibration on power transmission and testing accuracy.

[0016] It should be understood that both the foregoing general description and the following detailed description are for illustrative purposes and do not necessarily limit the scope of this disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of this disclosure. Furthermore, the specification and drawings serve to explain the principles of this disclosure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the drive shaft and vibration damping assembly in this invention; Figure 3 This is a partial perspective sectional view of the vibration damping component in this invention; Figure 4 This is a three-dimensional schematic diagram of the drive shaft and connecting shaft in this invention; Figure 5 This is a three-dimensional sectional view of the drive shaft in this invention; Figure 6 This is a three-dimensional schematic diagram of the connecting shaft and the insertion rod in this invention.

[0019] In the diagram: 1. Control panel; 2. Hub motor; 3. Control cabinet; 4. Hub rotation locking assembly; 5. Mounting bracket; 6. Servo motor; 7. Worm gear reducer; 8. Eddy current dynamometer; 9. Torque sensor; 10. Drive shaft; 11. Fixed bracket; 12. Connecting shaft; 13. Insert rod; 14. Magnetic block; 15. Electromagnet; 16. Return spring; 17. Locking block; 18. Locking slot; 19. Connecting sleeve; 20. Movable sleeve; 21. Compression spring; 22. Annular protrusion; 23. Push rod; 24. Vibration damping spring; 25. Ball bearing; 26. Pressure ring; 27. Connecting rod; 28. Deflection ring; 29. ​​First spherical ring; 30. Second spherical ring; 31. Connecting spring. Detailed Implementation

[0020] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This invention provides, for example Figures 1 to 6 The experimental rig for electromechanical coupling mechanism of a new energy vehicle, as shown, includes: an operating platform 1, a fixing device, and a driving device. The operating platform 1 is used to place the hub motor 2 to be tested, and a control cabinet 3 is provided on one side of the operating platform 1. The fixing device is installed on the top of the operating platform 1 to fix the hub motor 2. The fixing device includes a hub rotation locking assembly 4 and a mounting bracket 5. There are two hub rotation locking assemblies 4, which are symmetrically arranged on the front and rear sides of the hub motor 2. The mounting bracket 5 is slidably installed on the top of the operating platform 1, and the mounting bracket 5 is located away from the hub motor 2. On one side of the drive device, the mounting bracket 5 is aligned with the drive device, and the direction of movement of the mounting bracket 5 is parallel to the axis of the drive device. The drive device is mounted on the top of the operating table 1 and is used to drive the hub motor 2 to perform rotation detection. The drive device includes a power component, a connecting component, and a vibration damping component. The power component is used to provide power for the rotation of the hub motor 2. The connecting component is connected between the hub motor 2 and the power component to realize the quick connection between the power component and the hub motor 2. The vibration damping component is set between the hub motor 2 and the connecting component to absorb the vibration generated when the hub motor 2 rotates. The power assembly includes a servo motor 6, a worm gear reducer 7, an eddy current dynamometer 8, a torque sensor 9, and a drive shaft 10. The servo motor 6 is mounted on the top of the operating platform 1. The worm gear reducer 7 is connected to the output shaft of the servo motor 6. The eddy current dynamometer 8 and the torque sensor 9 are sequentially connected to the output shaft of the worm gear reducer 7. The drive shaft 10 is connected to the torque sensor 9 via a coupling. The servo motor 6, the worm gear reducer 7, the eddy current dynamometer 8, the torque sensor 9, and the drive shaft 10 are all connected to the top of the operating platform 1 by a fixed bracket 11. When fixing the hub motor 2, first place the hub motor 2 in the designated position on the operating table 1, and push the mounting bracket 5 to slide along the top of the operating table 1 towards the hub motor 2, so that the mounting bracket 5 abuts against the end of the hub motor 2, and axially position the hub motor 2; then activate the two hub rotation locking assemblies 4, so that they clamp and lock the hub motor 2 from the front and rear sides, realize the circumferential fixing of the hub motor 2, and complete the installation and fixing of the hub motor 2. The installation process is convenient and the fixing stability is strong, which avoids the hub motor 2 from shifting during the test and ensures the test accuracy. During the experiment on hub motor 2, servo motor 6 starts and outputs power. After being reduced in speed and increased in torque by worm gear reducer 7, the power is transmitted to eddy current dynamometer 8. Eddy current dynamometer 8 can simulate the load on hub motor 2 during actual operation, realizing testing under different load conditions. The power after load simulation is further transmitted to torque sensor 9. Torque sensor 9 can detect torque data in real time during power transmission and transmit the data to control cabinet 3 for recording and analysis. Finally, torque sensor 9 transmits power to drive shaft 10, which drives hub motor 2 to rotate, completing the power transmission. This enables testing of the electromechanical coupling characteristics of hub motor 2 under different speeds and loads. During the testing process, when radial vibration is generated during the rotation of the drive shaft 10, the vibration damping mechanism can absorb the vibration, thereby effectively reducing component wear, reducing maintenance frequency, and improving the testing accuracy and stability of the test bench.

[0021] like Figures 2 to 6As shown, the connecting assembly includes a connecting shaft 12, a plug rod 13, and an electromagnetic locking mechanism. The connecting shaft 12 is located at the end of the drive shaft 10 near the hub motor 2, and a connecting hole for connecting the output shaft of the hub motor 2 is opened at the position where the connecting shaft 12 and the hub motor 2 are directly opposite each other. The plug rod 13 is cylindrical and is fixedly connected to the axis of the connecting shaft 12 away from the hub motor 2. A plug hole is opened at the axis of the free end of the drive shaft 10, and the plug rod 13 is slidably inserted into the plug hole. A mounting hole coaxial with the plug hole is opened on the hole wall opposite to the plug rod 13. The electromagnetic locking mechanism is installed in the mounting hole and is used to realize the synchronous rotation of the connecting shaft 12 and the drive shaft 10 when the servo motor 6 is powered on. The electromagnetic locking mechanism includes a magnetic block 14, an electromagnet 15, and a return spring 16. The magnetic block 14 is slidably installed in the mounting hole along the axis of the drive shaft 10. The electromagnet 15 is located on the side of the magnetic block 14 away from the insertion rod 13. When the electromagnet 15 is energized, its magnetic pole is the same as the magnetic pole on the side directly opposite to the magnetic block 14. The electromagnet 14 is fixedly connected to the inner wall of the mounting hole. The return spring 16 is sleeved on the outside of the electromagnet 15. One end of the return spring 16 is fixedly connected to the magnetic block 14, and the other end of the return spring 16 is fixedly connected to the inner wall of the mounting hole. Several locking blocks 17 are fixedly connected on the side of the magnetic block 14 away from the electromagnet 15. The multiple locking blocks 17 are evenly distributed in a ring. The insertion rod 13 has a slot 18 at the end directly opposite to the locking blocks 17, which matches the number of locking blocks 17. The multiple locking blocks 17 can be respectively locked into the multiple slots 18. With the connection component, when the servo motor 6 is started, the electromagnet 15 is synchronously energized to generate magnetic force, thereby pushing the magnetic block 14 to slide away from the electromagnet 15 against the tension of the return spring 16. As the magnetic block 14 moves, the locking block 17 on the magnetic block 14 can fit against the end of the insertion rod 13 near the slot 18. At this time, as the drive shaft 10 rotates, the magnetic block 14 can rotate with the drive shaft 10. When the locking block 17 on the magnetic block 14 moves to the position directly opposite the slot 18, the pushing force of the electromagnet 15 on the magnetic block 14 can make the locking block 17 insert into the slot 18, thereby locking the connecting shaft 12 and the drive shaft 10. At this time, the rotation of the drive shaft 10 can drive the connecting shaft 12 to rotate synchronously, thereby driving the hub motor 2 to rotate. When the servo motor 6 stops, the electromagnet 15 is de-energized. At this time, the tension of the return spring 16 on the magnetic block 14 can separate the locking block 17 from the locking slot 18, thereby keeping the connecting shaft 12 disconnected from the drive shaft 10. At this time, the hub motor 2 can continue to drive the connecting shaft 12 to idle under its own inertia until it gradually stops, thus avoiding the impact of the torque generated by the output shaft of the hub motor 2 on the drive shaft 10, the coupling, and the various test components of the present invention when suddenly stopped, and extending the service life of each test component.

[0022] like Figure 2 and Figure 3 As shown, the vibration damping assembly includes a connecting sleeve 19, a movable sleeve 20, a compression spring 21, a vibration damping mechanism, and a compression mechanism. The connecting sleeve 19 is sleeved around the drive shaft 10, with the drive shaft 10 located at the axis of the connecting sleeve 19. The end of the connecting sleeve 19 away from the connecting shaft 12 is fixedly connected to an adjacent fixed bracket 11. The movable sleeve 20 is located on the side of the connecting sleeve 19 closer to the connecting shaft 12, with the connecting shaft 12 located at the axis of the movable sleeve 20. A [feature / feature] is provided at the end of the movable sleeve 20 closer to the connecting sleeve 19. An annular protrusion 22 is slidably inserted into the inner side of the connecting sleeve 19. A compression spring 21 is sleeved on the outer side of the annular protrusion 22, and the two ends of the compression spring 21 are fixedly connected to the connecting sleeve 19 and the movable sleeve 20 respectively. There are multiple vibration damping mechanisms, which are evenly distributed in an annular shape on the inner side of the movable sleeve 20. The vibration damping mechanisms can fit against the surface of the connecting shaft 12. The compression mechanism is connected to the side of the movable sleeve 20 away from the connecting sleeve 19 and is used to compress the hub motor 2. The vibration damping mechanism includes a push rod 23, a damping spring 24, and a ball bearing 25. The push rod 23 is vertically slidably inserted into the inner wall of the movable sleeve 20. The damping spring 24 is fixedly connected between the end of the push rod 23 away from the connecting shaft 12 and the inside of the movable sleeve 20. The ball bearing 25 is rotatably installed at the end of the push rod 23 away from the damping spring 24, and the ball bearing 25 can always keep in contact with the surface of the connecting shaft 12 under the pressure of the damping spring 24 on the push rod 23. The clamping mechanism includes a pressure ring 26 and connecting rods 27. The pressure ring 26 is located on the side of the movable sleeve 20 close to the hub motor 2. The pressure ring 26 and the movable sleeve 20 are coaxial, and the diameter of the pressure ring 26 is smaller than the diameter of the hub motor 2. There are multiple connecting rods 27, which are evenly and fixedly connected between the movable sleeve 20 and the pressure ring 26. After the hub motor 2 is installed on the mounting bracket 5, as the mounting bracket 5 moves the hub motor 2 closer to the connecting shaft 12, the output shaft of the hub motor 2 can be gradually inserted into the connecting hole of the connecting shaft 12. At the same time, as the hub motor 2 moves closer to the connecting shaft 12, the pressure ring 26 can gradually fit together with the hub motor 2. As the hub motor 2 continues to move closer to the connecting shaft 12, the movable sleeve 20 can squeeze the compression spring 21 under the push of the connecting rod 27. After the hub motor 2 is installed, the pressure ring 26 can keep it close to the hub motor 2 under the action of the compression spring 21, thereby ensuring the stability of the hub motor 2 installation, avoiding the hub motor 2 from shaking during the experiment, and ensuring the accuracy of the test results. Meanwhile, by setting up a vibration damping mechanism, if radial vibration deviation occurs during the rotation of the connecting shaft 12, the connecting shaft 12 will squeeze the ball 25. The ball 25 pushes the push rod 23 to slide into the movable sleeve 20, and the damping spring 24 is compressed. The elastic deformation of the damping spring 24 can absorb the impact force generated by the vibration of the connecting shaft 12. At the same time, the ball 25 rolls in contact with the surface of the connecting shaft 12, which can reduce the friction between the connecting shaft 12 and the vibration damping mechanism, avoid the wear of the connecting shaft 12 caused by vibration, effectively reduce the vibration during the rotation of the connecting shaft 12, and reduce the impact of vibration on power transmission and test accuracy.

[0023] like Figure 2 and Figure 3 As shown, a deflection ring 28 coaxially is provided on the side of the pressure ring 26 near the hub motor 2. A first spherical ring 29 and a second spherical ring 30 coaxially with the deflection ring 28 are fixedly connected to the side of the deflection ring 26 and the side of the pressure ring 26 respectively. The first spherical ring 29 and the second spherical ring 30 are rotatably engaged together. A connecting spring 31 is fixedly connected between the pressure ring 26 and the deflection ring 28. Since the contact point between the hub motor 2 and the pressure ring 26 may be uneven, the pressure ring 26 may not fit well against the hub motor 2. In this case, a deflection ring 28 is provided. When it is necessary to press the hub motor 2, the deflection ring 28 can replace the pressure ring 26 and fit against the hub motor 2. When the contact surface between the hub motor 2 and the deflection ring 28 is uneven, the deflection ring 28 can drive the first spherical ring 29 to deflect at any angle around the center of the second spherical ring 30, thereby ensuring that the deflection ring 28 can fit better against the hub motor 2, and thus ensuring that the vibration generated by the hub motor 2 can be better transmitted to the movable sleeve 20. Furthermore, due to the presence of the connecting spring 31, the connecting spring 31 can be adaptively compressed when the deflection ring 28 deflects, and the connecting spring 31 can also absorb the vibration when the vibration is transmitted to the connecting spring 31 through the deflection ring 28, thereby reducing the impact of vibration on the various test components in this invention.

[0024] Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0025] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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 disclosure 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 disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0027] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0028] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A test bench for the electromechanical coupling mechanism of new energy vehicles, characterized in that, include: The control panel (1) is used to place the hub motor (2) to be tested, and a control cabinet (3) is provided on one side of the control panel (1). A fixing device is installed on the top of the operating table (1) for fixing the hub motor (2). A drive unit is installed on the top of the operating table (1) and is used to drive the hub motor (2) to perform rotation detection. The drive unit includes a power component, a connecting component and a vibration damping component. The power component is used to provide power for the rotation of the hub motor (2). The connecting component is connected between the hub motor (2) and the power component to realize the quick connection between the power component and the hub motor (2). The vibration damping component is set between the hub motor (2) and the connecting component to absorb the vibration generated when the hub motor (2) rotates.

2. The test rig for electromechanical coupling mechanism of new energy vehicles according to claim 1, characterized in that: The fixing device includes a hub rotation locking assembly (4) and a mounting bracket (5). There are two hub rotation locking assemblies (4), which are symmetrically arranged on the front and rear sides of the hub motor (2). The mounting bracket (5) is slidably mounted on the top of the operating table (1), and the mounting bracket (5) is located on the side of the hub motor (2) away from the drive device. The mounting bracket (5) is directly opposite the drive device, and the direction of movement of the mounting bracket (5) is parallel to the axis of the drive device.

3. The test rig for electromechanical coupling mechanism of new energy vehicles according to claim 2, characterized in that: The power assembly includes a servo motor (6), a worm gear reducer (7), an eddy current dynamometer (8), a torque sensor (9), and a drive shaft (10). The servo motor (6) is mounted on the top of the operating table (1). The worm gear reducer (7) is connected to the output shaft of the servo motor (6). The eddy current dynamometer (8) and the torque sensor (9) are sequentially connected to the output shaft of the worm gear reducer (7). The drive shaft (10) is connected to the torque sensor (9) via a coupling. The servo motor (6), the worm gear reducer (7), the eddy current dynamometer (8), the torque sensor (9), and the drive shaft (10) are all connected to the top of the operating table (1) by a fixed bracket (11).

4. The test rig for electromechanical coupling mechanism of new energy vehicles according to claim 3, characterized in that: The connecting assembly includes a connecting shaft (12), a plug rod (13), and an electromagnetic locking mechanism. The connecting shaft (12) is located at the end of the drive shaft (10) near the hub motor (2), and a connecting hole for connecting the output shaft of the hub motor (2) is provided at the position where the connecting shaft (12) is directly opposite to the hub motor (2). The plug rod (13) is cylindrical and is fixedly connected to the axis at the end of the connecting shaft (12) away from the hub motor (2). A plug hole is provided at the axis at the free end of the drive shaft (10), and the plug rod (13) is slidably inserted into the plug hole. A mounting hole coaxial with the plug hole is provided on the hole wall of the plug hole directly opposite the plug rod (13). The electromagnetic locking mechanism is installed in the mounting hole and is used to realize the synchronous rotation of the connecting shaft (12) and the drive shaft (10) when the servo motor (6) is powered on.

5. The test rig for electromechanical coupling mechanism of new energy vehicles according to claim 4, characterized in that: The electromagnetic locking mechanism includes a magnetic block (14), an electromagnet (15), and a return spring (16). The magnetic block (14) is slidably installed in the mounting hole along the axis of the drive shaft (10). The electromagnet (15) is located on the side of the magnetic block (14) away from the insertion rod (13). When the electromagnet (15) is energized, its magnetic poles are the same as those on the side directly opposite the magnetic block (14), and the electromagnet (14) is fixedly connected to the inner wall of the mounting hole. The return spring (16) is sleeved on the outside of the electromagnet (15). One end of the reset spring (16) is fixedly connected to the magnetic block (14), and the other end of the reset spring (16) is fixedly connected to the inner wall of the mounting hole. Several locking blocks (17) are fixedly connected to the side of the magnetic block (14) away from the electromagnet (15), and the multiple locking blocks (17) are evenly distributed in a ring. The end of the insert rod (13) facing the locking block (17) is provided with a slot (18) matching the number of locking blocks (17), and the multiple locking blocks (17) can be respectively locked into the multiple slots (18).

6. The test rig for electromechanical coupling mechanism of new energy vehicles according to claim 5, characterized in that: The vibration damping assembly includes a connecting sleeve (19), a movable sleeve (20), a compression spring (21), a vibration damping mechanism, and a compression mechanism. The connecting sleeve (19) is sleeved around the drive shaft (10), which is located at the axis of the connecting sleeve (19). The end of the connecting sleeve (19) away from the connecting shaft (12) is fixedly connected to an adjacent fixed bracket (11). The movable sleeve (20) is located on the side of the connecting sleeve (19) closer to the connecting shaft (12), and the connecting shaft (12) is located at the axis of the movable sleeve (20). The movable sleeve (20) is positioned at the end closer to the connecting sleeve (19). An annular protrusion (22) is provided, and the annular protrusion (22) is slidably inserted into the inner side of the connecting sleeve (19). The compression spring (21) is sleeved on the outer side of the annular protrusion (22), and the two ends of the compression spring (21) are fixedly connected to the connecting sleeve (19) and the movable sleeve (20) respectively. There are multiple vibration damping mechanisms, and the multiple vibration damping mechanisms are evenly distributed in an annular shape on the inner side of the movable sleeve (20). The vibration damping mechanism can fit against the surface of the connecting shaft (12). The compression mechanism is connected to the side of the movable sleeve (20) away from the connecting sleeve (19) and is used to compress the hub motor (2).

7. The test rig for electromechanical coupling mechanism of new energy vehicles according to claim 6, characterized in that: The vibration damping mechanism includes a top rod (23), a damping spring (24), and a ball bearing (25). The top rod (23) is vertically slidably inserted into the inner wall of the movable sleeve (20). The damping spring (24) is fixedly connected between the end of the top rod (23) away from the connecting shaft (12) and the inside of the movable sleeve (20). The ball bearing (25) is rotatably installed at the end of the top rod (23) away from the damping spring (24), and the ball bearing (25) can always keep in contact with the surface of the connecting shaft (12) under the pressure of the damping spring (24) on the top rod (23).

8. The test rig for electromechanical coupling mechanism of new energy vehicles according to claim 7, characterized in that: The clamping mechanism includes a pressure ring (26) and connecting rods (27). The pressure ring (26) is located on the side of the movable sleeve (20) close to the hub motor (2). The pressure ring (26) and the movable sleeve (20) are coaxial, and the diameter of the pressure ring (26) is smaller than the diameter of the hub motor (2). There are multiple connecting rods (27), and multiple connecting rods (27) are evenly fixedly connected between the movable sleeve (20) and the pressure ring (26).

9. The test rig for electromechanical coupling mechanism of new energy vehicles according to claim 8, characterized in that: The pressure ring (26) is provided with a deflection ring (28) coaxial with it on the side near the hub motor (2). The deflection ring (28) and the pressure ring (26) are respectively fixedly connected with a first spherical ring (29) and a second spherical ring (30) coaxial with the deflection ring (28), and the first spherical ring (29) and the second spherical ring (30) are rotatably engaged together. A connecting spring (31) is fixedly connected between the pressure ring (26) and the deflection ring (28).

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