New energy driving motor comprehensive performance dynamometer device

Abstract

The application discloses a new energy driving motor comprehensive performance dynamometer device, and particularly relates to the technical field of motor testing, which comprises a dynamometer frame and a motor body, four limiting frames are installed on the side of the dynamometer frame close to the motor body, and the limiting frames are arranged around the outside of the motor body, a stable testing assembly is arranged between the dynamometer frame and the motor body, and the stable testing assembly is used for keeping the coaxiality of the motor body good during long-time dynamometer testing from the cold state to the hot state full stage, the stable testing assembly comprises a centering ring and two auxiliary limiting frames, wherein the centering ring is installed at the top end of the dynamometer frame, and the L-shaped air duct is formed by the cooperation of the air guide frame and the air guide groove, after the airflow enters the L-shaped air duct, the airflow flows along the horizontal section first, turns by a near-right angle, and then climbs upward along the vertical section and flows along the outer surface of the motor body, the air duct turning structure can make the airflow produce moderate turbulence, strengthen the heat exchange effect, and the airflow blows upward from the bottom of the motor body.

Description

Technical Field

[0001] This invention relates to the field of motor testing technology, and specifically to a comprehensive performance testing device for new energy drive motors. Background Technology

[0002] As a core power component in electric vehicles and industrial drives, the accurate measurement of the comprehensive performance of new energy drive motors is crucial for product quality control and R&D optimization. Dynamometers simulate actual motor operating conditions to perform steady-state and dynamic tests on key parameters such as speed, torque, power, and efficiency. During dynamometer testing, the motor under test must be reliably clamped and positioned to ensure coaxiality between its output shaft and the load device. Simultaneously, the heat generated by the motor during prolonged operation needs to be effectively dissipated to prevent thermal deformation from affecting measurement accuracy and testing safety. Existing clamping methods typically require covering a significant area of ​​the motor housing with a large contact surface or strong clamping. This contact area not only blocks cooling airflow from reaching the housing surface but also disrupts the natural continuous flow of airflow along the circumference of the housing. This can easily lead to non-uniform thermal expansion of the motor housing and internal components, causing coaxiality deviation between the motor shaft and the load shaft. This introduces additional bending moment interference in torque detection, ultimately reducing the realism of the motor operating condition simulation and the accuracy of the dynamometer data. Summary of the Invention

[0003] The purpose of this invention is to provide a comprehensive performance testing device for new energy drive motors to address the aforementioned shortcomings in the technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a comprehensive performance dynamometer for a new energy drive motor, comprising a dynamometer frame and a motor body, wherein four limiting frames are installed on the side of the dynamometer frame near the motor body, and the limiting frames are arranged around the outside of the motor body; a stabilizing component is provided between the dynamometer frame and the motor body, and the stabilizing component is used to ensure that the coaxiality of the motor body remains good throughout the entire process from cold to hot during long-term dynamometer testing. The stabilization assembly includes a centering ring and two auxiliary limit frames. The centering ring is installed at the top of the dynamometer frame, and the two auxiliary limit frames are respectively installed on the corresponding sides of two of the limit frames. The auxiliary limit frames have a toothed structure. The top of the dynamometer frame has several air guide slots. Each air guide slot has an air guide frame installed inside. The air guide frame and the air guide slot form an L-shaped air duct. The vertical section of the air duct is inclined. The outside of the centering ring is fixedly connected to a nozzle pipe that communicates with its interior. The nozzle pipe passes through the dynamometer frame and the air guide slot in sequence and then extends into the interior of the L-shaped air duct. The dynamometer frame is equipped with a fine-tuning component, which is used to push the air guide frame to move up and down along the air guide groove, thereby adjusting the distance between the L-shaped air duct and the opening of the air guide groove, and making the distance between the L-shaped air duct and the nozzle pipe adjusted synchronously. An auxiliary limiting component is installed between the dynamometer frame and two of the limiting frames, and the auxiliary limiting component is used to guide the two limiting frames to fit tightly along the outer arc of the motor body.

[0005] Preferably, the fine-tuning component includes a fine-tuning frame rotatably connected inside the dynamometer frame and a curved plate fixedly connected to the top of the fine-tuning frame, wherein the top of the curved plate and the bottom of the air guide frame are sloped together, and a servo motor is fixedly connected inside the dynamometer frame, and the servo motor is used to drive the fine-tuning frame to rotate. The top of the dynamometer frame is provided with a placement slot for embedding the centering ring, and the centering ring is kept at a distance from the bottom of the motor body through the placement slot. A blower is fixedly connected inside the dynamometer frame, and the air outlet of the blower is connected to the inside of the centering ring. Two symmetrical reset components are provided between the air guide trough and the air guide frame.

[0006] Preferably, each of the reset components includes a migration ring fixedly connected inside the air guide groove and a first push post fixedly connected to the bottom of the air guide frame. The first push post is configured as a T-shaped structure, with one end of the first push post passing through the migration ring. A first reset spring is connected between the migration ring and the first push post.

[0007] Preferably, the auxiliary limiting component includes two connecting rods fixedly connected to the two limiting frames on opposite sides and two connecting shafts movably connected to the outside of the dynamometer frame, with the two connecting rods sleeved on the outside of the two connecting shafts; Each of the connecting shafts is fixedly connected to the outside of a connecting arm. A centering shaft is installed at one end of the connecting arm. An auxiliary support rod is sleeved on the outside of the centering shaft. A connecting seat is slidably connected inside the dynamometer frame. One end of the auxiliary support rod penetrates into the inside of the dynamometer frame and forms a hinge with the connecting seat inside. An auxiliary mounting assembly is installed between each of the limiting frames and the auxiliary limiting frames.

[0008] Preferably, a first electric push rod is fixedly connected inside the dynamometer frame, and the telescopic end of the first electric push rod is fixedly connected to the connecting seat. At the point where the dynamometer frame and the auxiliary support rod pass through, there is a large gap between them, so that the connecting seat can move along the inside of the dynamometer frame.

[0009] Preferably, the auxiliary mounting assembly includes a rotating shaft movably connected to the side of the limiting frame near the motor body. The auxiliary limiting frame is movably sleeved on the outside of the rotating shaft, and the auxiliary limiting frame moves along one side of the limiting frame along an inclined trajectory via the rotating shaft, so that the auxiliary limiting frame abuts against the outside of the motor body. The limiting frame has a limiting slide cavity on the side near the auxiliary limiting frame, and an abutment plate is movably connected inside the limiting slide cavity. Both the abutment plate and the side of the auxiliary limiting frame near the motor body are flexible. The auxiliary limiting frame is internally equipped with a push assembly that guides the movement of the auxiliary limiting frame and the contact plate.

[0010] Preferably, the push assembly includes a push frame fixedly connected to one side of the auxiliary limiting frame and an abutting arc frame fixedly connected to one side of the abutting plate. The abutting arc frame passes through the limiting slide cavity and extends into the interior of the limiting frame. A second electric push rod is fixedly connected inside the limiting frame. The telescopic end of the second electric push rod is respectively equipped with a long abutting rod and a sliding cone column. The top of the long abutting rod is sloped to the outside of the abutting arc frame. The top of the pusher frame is provided with a sliding groove, which is designed as a curved structure. The sliding cone column passes through the pusher frame and extends into the interior of the sliding groove, forming a sliding connection with the sliding groove inside.

[0011] Preferably, a second push post is fixedly connected to one side of the contact plate, and a limiting ring for the second push post to be inserted is fixedly connected inside the limiting slide cavity. A second return spring is connected between the limiting ring and the second push post.

[0012] The technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. This invention forms an L-shaped air duct by combining an air guide frame and an air guide groove. After entering the L-shaped air duct, the airflow first flows along the horizontal section, then rises along the vertical section after a near right-angle turn and flows along the outer surface of the motor body. The turning structure of the air duct can generate moderate turbulence in the airflow, enhancing the heat exchange effect. The airflow blows upward from the bottom of the motor body, consistent with the natural rising direction of the hot air, so that the convective boundary layer on the outer shell surface develops in an orderly manner from bottom to top. At the same time, the air duct structure layout does not weaken the effective contact area and clamping positive pressure between the limit frame and the motor body. It can ensure the reliability of clamping and positioning while taking into account the smoothness of airflow. It can effectively maintain the operational stability of the steady-state thermal test of the motor body, ensure the coaxiality accuracy of the equipment from cold to hot state throughout the entire test process, reduce the interference of thermal deformation on the steady-state torque detection value, and improve the realism of the working condition simulation. 2. This invention maintains a stable contact during the operation of the air guide frame, allowing for smooth displacement along the air guide groove. As the air guide frame is continuously adjusted, the opening distance between the L-shaped air duct and the air guide groove gradually increases, and the relative distance between the nozzle pipe and the inclined section of the L-shaped air duct is synchronously and adaptively adjusted, effectively increasing the cross-sectional area of ​​the air duct. Consequently, the airflow of natural convection and auxiliary air supply increases, and the cooling and heat dissipation capacity can match the high-load heating conditions of the motor, further improving the overall stability of the motor body during long-term dynamometer operation. 3. This invention uses auxiliary limiting components to drive two sets of limiting frames to form a scissor-like adaptive adjustment and positioning of the motor body, abandoning the traditional linear feed clamping method. The limiting frames gradually fit the housing along the arc trajectory that matches the shape of the motor, completing the outer wall clamping and limiting. In the initial stage of arc fitting, the limiting frames maintain a large opening, and the contact force is gentle and controllable. As the fitting process progresses, the relative angle of the limiting frames gradually closes, and the fitting pressure in the pre-contact area increases in an orderly manner, so that the clamping force is evenly distributed on the circumferential surface of the motor housing. This improves the stress concentration and housing deformation problems caused by local point contact, effectively improving the safety and testing efficiency of motor dynamometer operation. 4. This invention gradually increases the contact pressure between the limiting frame and the motor body, thereby increasing the static friction of the contact surface. This can preferentially lock the circumferential and axial sliding degrees of freedom of the motor body, while the remaining areas that are not fully contacted remain in a low-pressure following state. Based on the pre-positioned and locked spatial posture of the motor body, the subsequent clamping structure completes the full-area contact at an extremely low relative speed. The overall clamping process has no obvious micro-rotation or axial movement, ensuring the contact stability between the auxiliary limiting frame and the motor housing. This allows the motor body to be stably fixed in the detection area of ​​the dynamometer frame. The motor can complete precise posture calibration before full clamping. Subsequent clamping only enhances the contact effect without changing the posture of the equipment, significantly improving the positioning accuracy of the dynamometer process and optimizing the frequency response characteristics and data fidelity of the detection signal. 5. In this invention, the auxiliary limiting frame follows the pushing frame and is adjusted along one side of the limiting frame in an arc, so that the auxiliary limiting frame gradually extends out from the inside of the limiting frame contact surface. First, the tooth tip of the auxiliary limiting frame makes slight contact with the outside of the motor body. As the arc slides, the embedding depth gradually increases. The contact between the teeth and the outer shell is from shallow to deep. The loading process is smooth and continuous, without sudden piercing or impact. 6. This invention utilizes a composite limiting mechanism of a limiting frame and an auxiliary limiting frame. First, the curved surface of the limiting frame adheres to the outer shell of the motor body, providing stable radial constraint and circumferential frictional resistance. Then, the toothed structure of the auxiliary limiting frame meshes and presses against the surface of the outer shell. Based on the flexible clamping of the curved surface, the toothed locking limit is superimposed, which can effectively avoid the circumferential slippage and slight rotation problems that occur in the motor body during continuous torque loading tests, and significantly improve the data continuity and detection stability of long-term steady-state tests. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the assembly of the limiting frame and the connecting rod of the present invention; Figure 3 This is a schematic diagram of the air guide frame of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of section A in the image; Figure 5 For the present invention Figure 3 Enlarged view of section B in the image; Figure 6 This is a schematic diagram of the L-shaped air duct of the present invention; Figure 7 This is a schematic diagram of the assembly of the limiting frame and the auxiliary limiting frame of the present invention; Figure 8 This is an exploded view of the auxiliary component of the present invention.

[0015] Explanation of reference numerals in the attached figures: 1. Dynamometer frame; 11. Motor body; 12. Limiting frame; 2. Stabilizing component; 21. Centering ring; 22. Air guide duct; 23. Air guide frame; 24. L-shaped air duct; 25. Blower; 26. Auxiliary limiting frame; 27. Nozzle pipe; 28. Placement slot; 3. Fine-tuning component; 31. Fine-tuning frame; 32. Curved plate; 33. Servo motor; 34. Migration ring; 35. First push post; 36. First return spring; 4. Auxiliary limiting assembly; 41. Connecting rod; 42. Connecting shaft; 43. Connecting arm; 44. Centering shaft; 45. Auxiliary support rod; 46. Connecting seat; 47. First electric push rod; 5. Auxiliary assembly; 51. Second electric push rod; 52. Rotating shaft; 53. Pushing frame; 54. Slide groove; 55. Sliding cone column; 56. Contact plate; 57. Limiting ring; 58. Second push column; 59. Second return spring; 501. Contact arc frame; 502. Long abutment rod; 503. Limiting slide cavity. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0017] This invention provides, for example Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The device shown is a comprehensive performance dynamometer for a new energy drive motor, including a dynamometer frame 1 and a motor body 11. Four limiting frames 12 are installed on the side of the dynamometer frame 1 near the motor body 11, and the limiting frames 12 are arranged around the outside of the motor body 11. A stabilizing component 2 is provided between the dynamometer frame 1 and the motor body 11, and the stabilizing component 2 is used to ensure that the coaxiality of the motor body 11 remains good throughout the entire process from cold to hot during long-term dynamometer testing. The dynamometer assembly 2 includes a centering ring 21 and two auxiliary limit frames 26. The centering ring 21 is installed at the top of the dynamometer frame 1, and the two auxiliary limit frames 26 are respectively installed on the corresponding sides of two limit frames 12. The auxiliary limit frames 26 have a toothed structure. The top of the dynamometer frame 1 has several air guide slots 22. Each air guide slot 22 has an air guide frame 23 installed inside it. The air guide frame 23 and the air guide slot 22 enclose an L-shaped air duct 24. The vertical section of the air duct is inclined. The outside of the centering ring 21 is fixedly connected to a nozzle pipe 27 that communicates with its interior. The nozzle pipe 27 passes through the dynamometer frame 1 and the air guide slot 22 in sequence and then extends into the interior of the L-shaped air duct 24. The dynamometer frame 1 is equipped with a fine-tuning component 3, which is used to push the air guide frame 23 to move up and down along the air guide groove 22, and adjust the distance between the L-shaped air duct 24 and the opening of the air guide groove 22 accordingly, and make the distance between the L-shaped air duct 24 and the nozzle pipe 27 be adjusted synchronously. The fine-tuning component 3 includes a fine-tuning frame 31 rotatably connected inside the dynamometer frame 1 and a curved plate 32 fixedly connected to the top of the fine-tuning frame 31. The top of the curved plate 32 and the bottom of the air guide frame 23 are sloped together. A servo motor 33 is fixedly connected inside the dynamometer frame 1 and is used to drive the fine-tuning frame 31 to rotate. The top of the dynamometer frame 1 is provided with a placement groove 28 for the centering ring 21 to be inserted, and the centering ring 21 maintains a distance from the bottom of the motor body 11 through the placement groove 28. A blower 25 is fixedly connected inside the dynamometer frame 1, and the air outlet of the blower 25 communicates with the inside of the centering ring 21. Two symmetrical reset components are provided between the air guide slot 22 and the air guide frame 23; Each reset assembly includes a migration ring 34 fixedly connected inside the air guide slot 22 and a first push post 35 fixedly connected to the bottom of the air guide frame 23. The first push post 35 is T-shaped, with one end of the first push post 35 passing through the migration ring 34. A first reset spring 36 is connected between the migration ring 34 and the first push post 35. Four sets of air guide frames 23 are arranged in a ring around the outside of the centering ring 21. The number of air guide slots 22, nozzle pipes 27, and reset components are all adapted to match the number of air guide frames 23. All structures work together in a coordinated manner. The specific structures and working principles of the dynamometer frame 1, motor body 11, and limit frame 12 are existing technologies and will not be described in detail in this application. Currently, the dynamometer detection operation process for the motor body 11 is as follows: first, the motor body 11 is placed in the detection area of the dynamometer frame 1, and the motor body 11 is limited and fixed by the limit frames 12 to ensure the stability of the detection working condition of the motor to be tested. The motor body 11 and the dynamometer frame 1 are butted and assembled through a high-performance coupling to ensure the coaxiality accuracy of the butt position. Secondly, the power cord of the motor body 11 is connected to the programmable DC power supply or AC variable frequency power supply matched with the dynamometer frame 1 to simulate the battery power supply or grid power supply working conditions; a Hall effect voltage and current sensor is connected in the connection loop between the power supply and the motor, and the collected signals are transmitted to a power analyzer to complete the wiring layout of the detection system, The detection process includes multiple groups of test working conditions: under the no-load test state, the dynamometer does not apply excitation, collects the no-load torque and no-load speed parameters of the motor, and calculates and measures the friction loss of the equipment; under the load test state, the loading torque of the dynamometer is gradually increased, or a speed control mode is adopted to complete the performance detection in the interval from rated torque to maximum torque; under the speed scanning test state, the operating speed is regulated through the speed mode of the electric dynamometer to detect the output performance of the motor under different speed working conditions, so as to realize the stability detection of the electrical performance of the motor body 11.

[0018] Reference Figure 2 , Figure 7 and Figure 8 as shown, an auxiliary limiting assembly 4 is jointly installed between the dynamometer frame 1 and two of the limit frames 12, and the auxiliary limiting assembly 4 is used to guide the two limit frames 12 to closely fit along the outer arc of the motor body 11. The auxiliary limiting assembly 4 includes two connecting rods 41 fixedly connected to the sides of the two limit frames 12 facing away from each other and two connecting shafts 42 movably connected to the outside of the dynamometer frame 1, and the two connecting rods 41 are sleeved outside the two connecting shafts 42; A connecting arm 43 is fixedly connected to the outside of each connecting shaft 42, a centering shaft 44 is installed at one end of the connecting arm 43, an auxiliary support rod 45 is sleeved outside the centering shaft 44, a connecting seat 46 is slidingly connected inside the dynamometer frame 1, one end of the auxiliary support rod 45 penetrates into the dynamometer frame 1 and forms a hinge with the connecting seat 46 inside the dynamometer frame 1; a first electric push rod 47 is fixedly connected inside the dynamometer frame 1, the telescopic end of the first electric push rod 47 is fixedly connected with the connecting seat 46, there is a large spacing between the dynamometer frame 1 and the auxiliary support rod 45 at the penetration position, so that the connecting seat 46 can move along the interior of the dynamometer frame 1; An auxiliary fitting assembly 5 is jointly installed between each limit frame 12 and the auxiliary limit frame 26. The auxiliary fitting assembly 5 includes a rotating shaft 52 movably connected to the side of the limit frame 12 close to the motor body 11, the auxiliary limit frame 26 is movably sleeved outside the rotating shaft 52, and the auxiliary limit frame 26 moves along one side of the limit frame 12 along an inclined track through the rotating shaft 52, so that the auxiliary limit frame 26 abuts against the outside of the motor body 11; A limiting slide cavity 503 is provided on the side of the limiting frame 12 near the auxiliary limiting frame 26. An abutment plate 56 is movably connected inside the limiting slide cavity 503. Both the abutment plate 56 and the side of the auxiliary limiting frame 26 near the motor body 11 are flexible. The auxiliary limiting frame 26 is equipped with a push assembly that guides the movement of the auxiliary limiting frame 26 and the contact plate 56. The limiting frame 12 is designed with an I-shaped structure on the side near the motor body 11, so that the middle of the limiting frame 12 is hollow. The auxiliary limiting frame 26 is located in the hollow position of the limiting frame 12 to fill the gap, ensuring that the auxiliary limiting frame 26 and the upper and lower sides of the limiting frame 12 are horizontal. Therefore, the auxiliary limiting frame 26 is embedded in the hollow position of the limiting frame 12. At the same time, the second electric push rod 51, the rotating shaft 52, the long abutment rod 502, the slide groove 54 and the sliding cone 55 are all in the hollow position of the limiting frame 12. The push assembly includes a push frame 53 fixedly connected to one side of the auxiliary limiting frame 26 and an abutting arc frame 501 fixedly connected to one side of the abutting plate 56. The abutting arc frame 501 passes through the limiting slide cavity 503 and extends into the interior of the limiting frame 12. A second electric push rod 51 is fixedly connected inside the limiting frame 12. The telescopic end of the second electric push rod 51 is respectively equipped with a long abutting rod 502 and a sliding cone column 55. The top of the long abutting rod 502 and the outside of the abutting arc frame 501 are sloped together. The top of the pusher frame 53 is provided with a sliding groove 54, which is a curved structure. The sliding cone 55 passes through the pusher frame 53 and extends into the interior of the sliding groove 54, forming a sliding connection with the sliding groove 54 inside. A second pusher 58 is also fixedly connected to one side of the contact plate 56. A limiting ring 57 for the second pusher 58 to be inserted is fixedly connected inside the limiting cavity 503. A second return spring 59 is connected between the limiting ring 57 and the second pusher 58.

[0019] Working principle: When using: refer to Figure 1 and Figure 2 As shown, when it is necessary to perform a longer dynamometer test on the motor body 11: First, the limiting frame 12 is placed on the testing worktable of the dynamometer frame 1. Multiple sets of limiting frames 12 are used to implement multi-point limiting constraints on the motor body 11 within the testing area. Among them, two sets of limiting frames 12 use differentiated contact cooperation to complete the positioning. After the first electric push rod 47 is started, its telescopic end pushes the connecting seat 46 upward along the interior of the dynamometer frame 1. The connecting seat 46 simultaneously drives the auxiliary support rod 45 mounted on the top to move upward, so that the support angle of the auxiliary support rod 45 between the connecting seat 46 and the centering shaft column 44 is adaptively fine-tuned. The auxiliary support rod 45 uses the connecting seat 46 as the motion base point. During the tilt adjustment process, it abuts against the outer wall of the centering shaft column 44, pushing the centering shaft column 44 to move in a directional direction, thereby driving one end of the connecting arm 43 to move synchronously. 2. As the connecting arm 43 is subjected to force, it rotates along the outside of the dynamometer frame 1 and swings synchronously with the connecting rod 41. This causes the connecting rod 41 and the connecting arm 43 to form a lever linkage motion with the connecting shaft column 42 as the fulcrum. The two sets of connecting rods 41 drive the two sets of limiting frames 12 respectively, so that the two sets of limiting frames 12 abandon the traditional linear feeding method and gradually fit the shell along the arc trajectory of the matching motor body 11. Finally, the outer wall of the motor body 11 is clamped and limited. In the initial stage of arc fitting, the limiting frame 12 maintains a large opening, and the contact force is gentle and controllable. As the fitting process continues, the relative angle between the limiting frame 12 and the motor body 11 gradually closes, and the fitting pressure in the pre-contact area increases steadily, realizing flexible and progressive fitting and positioning. refer to Figure 2 , Figure 7 and Figure 8As shown, as the contact pressure between the limiting frame 12 and the motor body 11 gradually increases, the static friction of the contact surface increases synchronously, which can preferentially lock the circumferential and axial sliding degrees of freedom of the motor body 11. The remaining limiting structures that are not fully contacted remain in a low-pressure following state. Under the premise that the spatial posture of the motor body 11 is initially locked, the subsequent clamping structure completes the full-range contact at an extremely low relative speed. The overall clamping process will not produce obvious micro-rotation or axial movement. Then, the second electric push rod 51 is activated. Its telescopic end drives the sliding cone column 55 to slide along the inside of the slide groove 54 according to the preset trajectory. The sliding cone column 55 abuts against the inner wall of the slide groove 54, which drives the push frame 53 to complete a small arc adjustment. During the movement of the push frame 53, it pushes the auxiliary limiting frame 26 to swing around the rotation axis 52 in a circular motion, so that the auxiliary limiting frame 26 makes arc adjustment along the side of the limiting frame 12 and gradually extends from the inside of the contact surface of the limiting frame 12. The auxiliary limiting frame 26 first slightly contacts the outer wall of the motor body 11 with the tooth tip, and then slides in an arc. As the insertion depth gradually increases, the teeth and the outer shell fit together smoothly from shallow to deep, and the loading process is continuous and impact-free. At the same time, the telescopic end of the second electric push rod 51 synchronously drives the long abutment rod 502 to move. The long abutment rod 502 and the abutment arc frame 501 form a slope-matched transmission, pushing the abutment arc frame 501 to slide horizontally along the limiting slide cavity 503 and the inside of the limiting frame 12, driving the abutment plate 56 to move closer to the outside of the motor body 11. During the movement of the abutment plate 56, the second push column 58 is driven to move horizontally along the inside of the limiting ring 57, and the second reset spring 59 is stretched simultaneously. Relying on the elastic adaptive buffering force of the spring, the motor body 11 is stably kept in the detection area of ​​the dynamometer frame 1. This structure allows the motor body 11 to complete accurate posture calibration before it is fully clamped. Subsequent clamping and loading only enhance the fit effect and will not change the positioning posture of the equipment, effectively improving the positioning accuracy of the motor dynamometer process and improving the frequency response characteristics and signal fidelity of the detection signal. refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, finally, the motor body 11 is prone to continuous temperature rise during long-term load testing. The equipment can achieve constant temperature testing through a dynamic air-guiding heat dissipation structure. The servo motor 33 drives the fine-tuning frame 31 to rotate inside the dynamometer frame 1, and synchronously drives the curved plate 32 to rotate along the bottom of the centering ring 21. During the rotation of the curved plate 32, it abuts against and pushes the air guide frame 23 to move upward along the air guide groove 22. The upward movement of the air guide frame 23 drives the first push column 35 to move synchronously along the migration ring 34, stretching the first reset spring 36. The first reset spring 36 relies on its own elasticity to continuously apply downward preload to the first push column 35, ensuring that the air guide frame 23 slides stably along the air guide groove 22. During the adjustment of the air guide frame 23, the opening distance between the L-shaped air duct 24 and the air guide groove 22 continuously changes, and the relative distance between the nozzle pipe 27 and the inclined section of the L-shaped air duct 24 is synchronously adaptively matched and adjusted. refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, after the blower 25 starts, it draws in outside air. The air is accelerated and pressurized by the blower 25 to form a high-energy, high-speed airflow, which is then directionally ejected from the air outlet. After being collected by the centering ring 21, the airflow is transported to the area surrounding the L-shaped air duct 24 through the nozzle pipe 27. After entering the L-shaped air duct 24, the airflow first flows along the horizontal section, then rises along the vertical section after a near-right-angle turn, flowing in close contact with the surface of the motor body 11 throughout the entire process. The turning structure of the air duct can generate moderate turbulence in the airflow, enhancing the convective heat transfer effect. The airflow blows upward from the bottom of the motor, which is consistent with the natural rising direction of the hot air, with no reverse airflow interfering. To minimize disturbance and reduce ineffective dissipation of airflow kinetic energy, the airflow washes over the motor casing layer by layer from bottom to top, gradually disrupting the convective boundary layer on the casing surface. This achieves uniform air-cooling coverage of the entire motor. The high-temperature area at the top of the motor can come into contact with the airflow that has been preheated at the bottom and still has an effective heat exchange temperature difference, thus maintaining the heat dissipation effect and avoiding the top heat dissipation blind spot. This heat dissipation structure can ensure the stability of the motor body under long-term hot-state testing, ensuring that the coaxiality of the motor remains good throughout the entire testing process from cold to hot state. It also reduces the interference of thermal deformation on the steady-state test torque value, improving the realism of the operating condition simulation and the detection accuracy.

[0020] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A comprehensive performance testing device for a new energy drive motor, comprising a dynamometer frame (1) and a motor body (11), wherein four limiting frames (12) are installed on the side of the dynamometer frame (1) near the motor body (11), and the limiting frames (12) are arranged around the outside of the motor body (11), characterized in that: A dynamometer assembly (2) is provided between the dynamometer frame (1) and the motor body (11), and the dynamometer assembly (2) is used to ensure that the coaxiality of the motor body (11) remains good throughout the entire process from cold to hot during long-term dynamometer testing. The stabilization assembly (2) includes a centering ring (21) and two auxiliary limit frames (26). The centering ring (21) is installed at the top of the dynamometer frame (1), and the two auxiliary limit frames (26) are respectively installed on the corresponding side of two limit frames (12). The auxiliary limit frames (26) have a toothed structure. The top of the dynamometer frame (1) is provided with several air guide slots (22). Each air guide slot (22) is equipped with an air guide frame (23). The air guide frame (23) and the air guide slot (22) enclose each other to form an L-shaped air duct (24). The vertical section of the air duct is inclined. The outside of the centering ring (21) is fixedly connected to a nozzle pipe (27) that communicates with its interior. The nozzle pipe (27) passes through the dynamometer frame (1) and the air guide slot (22) in sequence and then extends into the interior of the L-shaped air duct (24). The dynamometer frame (1) is equipped with a fine-tuning component (3), which is used to push the air guide frame (23) to move up and down along the air guide groove (22), and adjust the distance between the L-shaped air duct (24) and the opening of the air guide groove (22) accordingly, and make the distance between the L-shaped air duct (24) and the nozzle pipe (27) be adjusted synchronously. An auxiliary limiting component (4) is installed between the dynamometer frame (1) and two of the limiting frames (12), and the auxiliary limiting component (4) is used to guide the two limiting frames (12) to fit tightly along the outer arc of the motor body (11).

2. The comprehensive performance dynamometer device for a new energy drive motor according to claim 1, characterized in that: The fine-tuning component (3) includes a fine-tuning frame (31) rotatably connected inside the dynamometer frame (1) and a curved plate (32) fixedly connected to the top of the fine-tuning frame (31). The top of the curved plate (32) and the bottom of the air guide frame (23) are sloped together. A servo motor (33) is fixedly connected inside the dynamometer frame (1), and the servo motor (33) is used to drive the fine-tuning frame (31) to rotate. The top of the dynamometer frame (1) is provided with a placement groove (28) for the centering ring (21) to be inserted, and the centering ring (21) is kept at a distance from the bottom of the motor body (11) through the placement groove (28). A blower (25) is fixedly connected inside the dynamometer frame (1), and the air outlet of the blower (25) is connected to the inside of the centering ring (21). Two symmetrical reset components are provided between the air guide groove (22) and the air guide frame (23).

3. The comprehensive performance dynamometer device for a new energy drive motor according to claim 2, characterized in that: Each of the reset components includes a migration ring (34) fixedly connected inside the air guide groove (22) and a first push post (35) fixedly connected to the bottom of the air guide frame (23). The first push post (35) is T-shaped, and one end of the first push post (35) passes through the migration ring (34). The migration ring (34) and the first push post (35) are connected together by a first reset spring (36).

4. The comprehensive performance dynamometer for a new energy drive motor according to claim 1, characterized in that: The auxiliary limiting component (4) includes two connecting rods (41) fixedly connected to the two limiting frames (12) on opposite sides and two connecting shafts (42) movably connected to the outside of the dynamometer frame (1), with the two connecting rods (41) sleeved on the outside of the two connecting shafts (42); Each of the connecting shafts (42) is fixedly connected to the outside of a connecting arm (43). A centering shaft (44) is installed at one end of the connecting arm (43). An auxiliary support rod (45) is sleeved on the outside of the centering shaft (44). A connecting seat (46) is slidably connected inside the dynamometer frame (1). One end of the auxiliary support rod (45) penetrates into the inside of the dynamometer frame (1) and forms a hinge with the connecting seat (46) inside the frame. Each of the aforementioned limiting frames (12) and auxiliary limiting frames (26) is connected by an auxiliary attachment component (5).

5. The comprehensive performance dynamometer for a new energy drive motor according to claim 4, characterized in that: The dynamometer frame (1) is fixedly connected to a first electric push rod (47), and the telescopic end of the first electric push rod (47) is fixedly connected to a connecting seat (46). At the point where the dynamometer frame (1) and the auxiliary support rod (45) pass through, there is a gap between them, so that the connecting seat (46) moves along the inside of the dynamometer frame (1).

6. The comprehensive performance dynamometer for a new energy drive motor according to claim 4, characterized in that: The auxiliary mounting component (5) includes a rotating shaft (52) movably connected to the side of the limiting frame (12) near the motor body (11). The auxiliary limiting frame (26) is movably sleeved on the outside of the rotating shaft (52), and the auxiliary limiting frame (26) moves along one side of the limiting frame (12) along the rotating shaft (52) in an inclined trajectory, so that the auxiliary limiting frame (26) abuts against the outside of the motor body (11).

7. The comprehensive performance dynamometer device for a new energy drive motor according to claim 6, characterized in that: The limiting frame (12) has a limiting slide cavity (503) on the side near the auxiliary limiting frame (26). The limiting slide cavity (503) is movably connected to a contact plate (56). Both the contact plate (56) and the auxiliary limiting frame (26) are flexible on the side near the motor body (11). The auxiliary limiting frame (26) is provided with a push assembly inside to guide the movement of the auxiliary limiting frame (26) and the contact plate (56).

8. The comprehensive performance dynamometer for a new energy drive motor according to claim 7, characterized in that: The push assembly includes a push frame (53) fixedly connected to one side of the auxiliary limit frame (26) and an abutting arc frame (501) fixedly connected to one side of the abutting plate (56). The abutting arc frame (501) passes through the limiting slide cavity (503) and extends into the interior of the limit frame (12). A second electric push rod (51) is fixedly connected inside the limit frame (12). The telescopic end of the second electric push rod (51) is respectively equipped with a long abutting rod (502) and a sliding cone column (55). The top of the long abutting rod (502) is sloped to the outside of the abutting arc frame (501).

9. The comprehensive performance dynamometer for a new energy drive motor according to claim 8, characterized in that: The top of the pusher (53) is provided with a sliding groove (54), and the sliding groove (54) is designed as a curved structure. The sliding cone (55) passes through the pusher (53) and extends into the interior of the sliding groove (54), and forms a sliding connection with the sliding groove (54) inside the groove.

10. A comprehensive performance dynamometer for a new energy drive motor according to claim 9, characterized in that: A second push post (58) is fixedly connected to one side of the contact plate (56), and a limiting ring (57) for the second push post (58) to be inserted is fixedly connected inside the limiting slide cavity (503). A second return spring (59) is connected between the limiting ring (57) and the second push post (58).

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