Automobile steering motor performance testing device and method

Abstract

The invention discloses an automobile steering motor performance testing device, which relates to the technical field of motor testing and comprises a box shell and a torque and rotating speed sensor. A box cover is hinged to the rear side of the top face of the box shell, damping rods are fixed to the four corners of the bottom face in the box shell, springs are connected to the outer sides of the damping rods in a sleeving mode, the top ends of the damping rods are connected with one corner of the bottom face of the testing table, the top ends of the springs are connected with the bottom face of the testing table, and the bottom ends of the springs are connected with the bottom face in the box shell. According to the automobile steering motor performance testing device and method, road excitation in the running process of an automobile is reproduced by simulating a vibration environment, and torque fluctuation and mechanical reliability of the motors under the vibration condition are detected; meanwhile, a high-temperature environment is simulated to test the heat dissipation performance and the high-temperature demagnetization risk of the motor, and a low-temperature environment can also be simulated to verify the cold starting capability and the lubricating grease adaptability.

Description

Technical Field

[0001] The present invention relates to the technical field of motor testing, and particularly to an automotive steering motor performance testing device and method. Background Art

[0002] An automotive steering motor is the core power source of an electric power steering system (EPS). It outputs precise torque through ECU instructions to provide steering assistance for the driver, while reducing energy consumption and improving handling sensitivity. Its working principle is based on real-time data feedback from sensors (torque / speed) to dynamically adjust the assistance intensity, taking into account light operation at low speeds and high-speed stability. In an automotive electric power steering system (EPS), the performance of the steering motor directly affects driving safety and handling experience. There are problems with traditional steering motor testing methods. Most test benches only measure the static torque and speed of the motor and cannot simulate environmental stresses such as vibration, high and low temperatures, and humidity during actual vehicle driving, resulting in test data not matching the actual working conditions. Moreover, most rely on manual data recording, which is error-prone and cannot monitor abnormalities in real time. For this reason, we propose an automotive steering motor performance testing device and method. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide an automotive steering motor performance testing device and method. By simulating a vibration environment to reproduce the road excitation during vehicle driving, it detects the torque fluctuation and mechanical reliability of the motor under vibration conditions. At the same time, it simulates a high-temperature environment to test the heat dissipation performance of the motor and the risk of high-temperature demagnetization, and can also simulate a low-temperature environment to verify the cold start ability and grease adaptability, effectively solving the problems in the background art.

[0004] To achieve the above object, the present invention provides the following technical solution: An automotive steering motor performance testing device, including a box shell and a torque and speed sensor; Box shell: The rear side of the top surface is hinged with a box cover. At the four corners of the inner bottom surface of the box shell, damping rods are fixedly installed. Springs are sleeved outside the damping rods. The top ends of the damping rods are connected to a corner of the bottom surface of the test bench. The top ends of the springs are connected to the bottom surface of the test bench, and the bottom ends of the springs are connected to the inner bottom surface of the box shell. Vibration motors are installed on both the left and right sides of the top surface of the test bench. The torque and speed sensor is fixedly installed in the middle of the top surface of the test bench. A hysteresis brake is fixedly installed on the rear side of the top surface of the test bench. The output shaft of the hysteresis brake is correspondingly installed with the rear end of the coupling. The front end of the coupling is correspondingly installed with the output end of the torque and speed sensor. An adjustment unit is provided on the top surface of the test bench, and a simulation unit is provided on the side surface of the box shell. Among them, it further includes a controller, which is arranged at the right end of the front side of the box body. The input ends of the vibration motor and the hysteresis brake are electrically connected to the output end of the controller, the output end of the torque and speed sensor is electrically connected to the input end of the controller, and the input end of the controller is electrically connected to the output end of an external power supply.

[0005] A coupling is provided to connect and install the torque and speed sensor and the hysteresis brake. The torque and speed sensor can be installed on the output shaft of the automotive steering motor, so as to accurately simulate the dynamic load change of the EPS system and monitor data in real time. The vibration motor cooperates with the combination of the damping rod and the spring to reproduce the road excitation during vehicle driving to detect the torque fluctuation and mechanical reliability of the motor under vibration conditions.

[0006] Furthermore, the adjusting unit includes a main motor, a main lead screw, a lifting frame, a fixing plate, a motor fixing frame, a secondary motor, a secondary lead screw and a bracket. The main motor is fixed at the front side of the top surface of the test bench. The output shaft of the main motor is connected to the top end of the main lead screw. The main lead screw is threadedly connected to the threaded hole on the surface of the lifting frame. The lifting frame is slidably connected to the through groove on the surface of the test bench. The top ends on both sides of the lifting frame are respectively connected to the bottom surface of the fixing plate. The top surface of the fixing plate is evenly distributed with brackets. Secondary motors are fixed on both the left and right side surfaces of the brackets. The output shaft of the secondary motor is connected to the end of the secondary lead screw. The secondary lead screw is threadedly connected to the threaded hole on the surface of the motor fixing frame. The motor fixing frame is slidably attached to the top surface of the fixing plate. The input ends of the main motor and the secondary motor are electrically connected to the output end of the controller. Starting the main motor drives the main lead screw to rotate to drive the fixing plate to lift and lower to adjust the height of the motor, while the secondary motor drives the secondary lead screw to rotate to drive the motor fixing frame to clamp motors of different specifications, so as to improve the practicability of the automotive steering motor test.

[0007] Furthermore, the adjusting unit further includes anti-slip strips, a pressing plate, a rubber pad and hydraulic rods. The anti-slip strips are evenly distributed on the inner side surface of the motor fixing frame. There are two hydraulic rods, which are respectively fixed in the middle of the outer side surfaces of the corresponding two motor fixing frames. The top end of the hydraulic rod is connected to the bottom surface of the pressing plate. The rubber pad is bonded to the bottom surface of the pressing plate. The input end of the hydraulic rod is electrically connected to the output end of the controller. Starting the hydraulic rod drives the pressing plate to press down to tightly fix the motor, and cooperate with the anti-slip strips and the rubber pad to prevent the motor from shifting or being damaged during the test.

[0008] Further, the simulation unit includes a fan, a heating shell, a base, a magnetic sealing strip, a temperature controller, a heating pipe, a magnetic plate, and a semiconductor refrigerator. The heating shell is fixed to the left side of the box shell. The right side of the heating shell communicates with the left side of the box shell through a ventilation hole. Bases are fixed on both sides of the surface of the heating shell. A fan is placed inside the base. A magnetic sealing strip is fixed to the front side of the heating shell. A heating pipe is installed on the rear side of the magnetic plate. The heating pipe is slidably installed inside the heating shell. The temperature controller is installed at the left end of the front side of the box shell. The semiconductor refrigerator is fixed to the right side inside the box shell. The heat dissipation end of the semiconductor refrigerator is located on the right side of the box shell. The input ends of the heating pipe and the semiconductor refrigerator are electrically connected to the output end of the temperature controller. The input ends of the temperature controller and the fan are electrically connected to the output end of the controller. The heating pipe is used in cooperation with the fan to circulate hot air to increase the temperature inside the box shell, so as to simulate the high-temperature environment to test the heat dissipation performance of the motor and the risk of high-temperature demagnetization. The semiconductor refrigerator is used in cooperation with the fan to circulate cold air to lower the temperature inside the box shell, so as to test the starting torque and running stability of the motor at low temperature.

[0009] Further, the simulation unit further includes a baffle, a placement groove, a linear motor, and exhaust holes. The exhaust holes are evenly opened on the rear side of the box shell. There are two placement grooves, which are respectively opened at the left and right ends of the rear side of the box shell. A linear motor is fixed inside the placement groove. The rear side of the moving element seat of the linear motor is connected to one end of the front side of the baffle. The baffle is attached to the rear side of the box shell. The input end of the linear motor is electrically connected to the output end of the controller. Starting the linear motor drives the baffle to rise to open the exhaust holes to quickly discharge the hot air and cold air.

[0010] Further, it further includes a display screen and an audible and visual alarm. The display screen is installed on the front side of the box cover. There are two audible and visual alarms, which are installed on the front side of the top surface of the box shell corresponding to the left and right. The input ends of the display screen and the audible and visual alarm are electrically connected to the output end of the controller. The display screen can display the detected data in real time, and when a problem is detected, the audible and visual alarm will flash and alarm in time to remind the personnel to check.

[0011] Further, it further includes a lighting lamp and an observation window. There are two lighting lamps, which are respectively installed on the left and right sides inside the box shell. The observation window is installed on the top surface of the box cover. The input end of the lighting lamp is electrically connected to the output end of the controller. The lighting lamp provides illumination inside the box shell. The provided observation window facilitates visual inspection by personnel to reduce the number of times of opening the box.

[0012] Further, it further includes fixed rods and grips. There are two fixed rods, which are respectively rotatably installed at both ends of the rear side of the top surface of the box shell. The bottom surface of the fixed rod is attached to the top surface of the box cover. The grip is installed at the bottom end of the front side of the box cover. The provided fixed rods are used to prevent the box cover from being accidentally opened.

[0013] Further, it also includes a temperature sensor, which is fixedly installed at the bottom end of the front side of the box shell. The output end of the temperature sensor is electrically connected to the input end of the controller. The temperature sensor detects the temperature inside the box shell to determine whether the temperature of the simulation test is within an appropriate range.

[0014] The usage method of the automotive steering motor performance test device includes the following steps: 1): Start the main motor to drive the main lead screw to rotate to adjust the height of the lifting frame, start the auxiliary motor to drive the auxiliary lead screw to rotate to adjust the distance between the motor fixing frames, install motors of different sizes, and install the motor shaft of the motor to be detected on the torque and speed sensor. At the same time, start the hydraulic rod to press down the pressing plate to firmly fix the motor to prevent it from falling off during the motor test; 2): Start the controller to select no-load or load test, apply load to the set hysteresis brake, and the torque and speed sensor records the data of the motor test. The vibration motor cooperates with the spring and the damping rod to simulate the operation of the motor under the vibration environment during vehicle driving; 3): Use the temperature controller to set the target temperature for high-temperature test. The heating tube starts to heat and cooperates with the fan to circulate hot air to make the inside of the box shell reach a high temperature to test the influence on the motor performance. At the same time, the temperature controller can also be used to set the target temperature for low-temperature test. Start the semiconductor refrigerator to refrigerate and start the fan to circulate cold air at the same time to test the operation of the motor at low temperature.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The automotive steering motor performance test device and method of the present invention have the following advantages: 1. The coupling is set to connect and install the torque and speed sensor and the hysteresis brake. The torque and speed sensor can be installed on the output shaft of the automotive steering motor, so that the dynamic load change of the EPS system can be accurately simulated and data can be monitored in real time. The vibration motor cooperates with the combination of the damping rod and the spring to reproduce the road excitation during vehicle driving to detect the torque fluctuation and mechanical reliability of the motor under vibration conditions.

[0016] 2. The heating tube is used in cooperation with the fan to circulate hot air to increase the temperature inside the box shell to simulate the high-temperature environment to test the heat dissipation performance of the motor and the risk of high-temperature demagnetization. The semiconductor refrigerator cooperates with the fan to circulate cold air to reduce the temperature inside the box shell to test the starting torque and operation stability of the motor at low temperature.

[0017] 3. The detected data can be displayed in real time through the display screen, and when a problem occurs during the detection, the sound and light alarm will flash and alarm in time to remind the personnel to check. The lighting lamp provides lighting inside the box shell, and the set observation window is convenient for personnel to visually inspect to reduce the number of times of opening the box.

[0018] 4. The main motor is started to drive the main lead screw to rotate, which drives the fixed plate to move up and down to adjust the height of the motor. The auxiliary motor drives the auxiliary lead screw to rotate, which drives the motor fixing bracket to clamp motors of different specifications. The hydraulic rod is started to drive the pressing plate to press down to tightly fix the motor, and the anti-slip strip and rubber pad are used to prevent the motor from shifting or being damaged during the test. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a schematic structural diagram of the rear side of the box shell of the present invention; Figure 3 It is a schematic structural diagram of the adjustment unit of the present invention; Figure 4 It is a schematic structural diagram of the top surface of the fixed plate of the present invention.

[0020] In the figure: 1 box shell, 2 adjustment unit, 21 main motor, 22 main lead screw, 23 lifting frame, 24 fixed plate, 25 motor fixing bracket, 26 auxiliary motor, 27 auxiliary lead screw, 28 bracket, 29 anti-slip strip, 210 pressing plate, 211 rubber pad, 212 hydraulic rod, 3 simulation unit, 31 fan, 32 heating shell, 33 machine base, 34 magnetic sealing strip, 35 temperature controller, 36 heating tube, 37 magnetic plate, 38 semiconductor refrigerator, 39 baffle, 310 placement groove, 311 linear motor, 312 exhaust hole, 4 box cover, 5 damping rod, 6 spring, 7 test bench, 8 vibration motor, 9 torque and speed sensor, 10 coupling, 11 mounting seat, 12 hysteresis brake, 13 display screen, 14 sound and light alarm, 15 lighting lamp, 16 observation window, 17 fixed rod, 18 grip, 19 temperature sensor, 101 controller. Specific Embodiment

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-4 , this embodiment provides a technical solution: an automotive steering motor performance testing device, including a box shell 1 and a torque and speed sensor 9; Housing 1: A box cover 4 is hinged to the rear side of the top surface. At the four corners of the inner bottom surface of the housing 1, damping rods 5 are fixed. A spring 6 is sleeved outside the damping rod 5. The top end of the damping rod 5 is connected to a corner of the bottom surface of the test bench 7. The top end of the spring 6 is connected to the bottom surface of the test bench 7, and the bottom end of the spring 6 is connected to the inner bottom surface of the housing 1. Vibration motors 8 are installed on both the left and right sides of the top surface of the test bench 7. A torque and speed sensor 9 is fixed in the middle of the top surface of the test bench 7. A hysteresis brake 12 is fixed to the rear side of the top surface of the test bench 7. The output shaft of the hysteresis brake 12 is correspondingly installed with the rear end of the coupling 10. The front end of the coupling 10 is correspondingly installed with the output end of the torque and speed sensor 9. An adjustment unit 2 is provided on the top surface of the test bench 7. The adjustment unit 2 includes a main motor 21, a main lead screw 22, a lifting frame 23, a fixing plate 24, a motor fixing frame 25, a sub-motor 26, a sub-lead screw 27, and a bracket 28. The main motor 21 is fixed to the front side of the top surface of the test bench 7. The output shaft of the main motor 21 is connected to the top end of the main lead screw 22. The main lead screw 22 is in threaded connection with the threaded hole on the surface of the lifting frame 23. The lifting frame 23 is slidably connected to the through groove on the surface of the test bench 7. The top ends on both sides of the lifting frame 23 are respectively connected to the bottom surface of the fixing plate 24. The top surface of the fixing plate 24 is evenly distributed with brackets 28. Sub-motors 26 are fixed to both the left and right sides of the bracket 28. The output shaft of the sub-motor 26 is connected to the end of the sub-lead screw 27. The sub-lead screw 27 is in threaded connection with the threaded hole on the surface of the motor fixing frame 25. The motor fixing frame 25 is slidably attached to the top surface of the fixing plate 24. The input ends of the main motor 21 and the sub-motor 26 are electrically connected to the output end of the controller 101. Starting the main motor 21 drives the main lead screw 22 to rotate to drive the fixing plate 24 to lift and lower to adjust the height of the motor, while the sub-motor 26 drives the sub-lead screw 27 to rotate to drive the motor fixing frame 25 to clamp motors of different specifications, so as to improve the practicability of the automotive steering motor test. The adjustment unit 2 further includes anti-slip strips 29, a pressing plate 210, a rubber padA heating tube 36 is installed on the rear side of the magnetic attraction plate 37. The heating tube 36 is slidably installed inside the heating shell 32. The thermostat 35 is installed at the left end of the front side of the box shell 1. The semiconductor refrigerator 38 is fixed on the right side inside the box shell 1. The heat release end of the semiconductor refrigerator 38 is located on the right side of the box shell 1. The input ends of the heating tube 36 and the semiconductor refrigerator 38 are electrically connected to the output end of the thermostat 35. The input ends of the thermostat 35 and the blower 31 are electrically connected to the output end of the controller 101. The heating tube 36 is used in cooperation with the blower 31 to circulate hot air to increase the temperature inside the box shell 1, so as to simulate a high-temperature environment to test the heat dissipation performance of the motor and the risk of high-temperature demagnetization. The semiconductor refrigerator 38 is used in cooperation with the blower 31 to circulate cold air to lower the temperature inside the box shell 1, so as to test the starting torque and running stability of the motor at low temperature. The simulation unit 3 further includes a shielding plate 39, a placement groove 310, a linear motor 311 and an exhaust hole 312. The exhaust holes 312 are evenly opened on the rear side of the box shell 1. There are two placement grooves 310 which are respectively opened at the left and right ends of the rear side of the box shell 1. The linear motor 311 is fixed inside the placement groove 310. The rear side of the moving element seat of the linear motor 311 is connected to one end of the front side of the shielding plate 39. The shielding plate 39 is attached to the rear side of the box shell 1. The input end of the linear motor 311 is electrically connected to the output end of the controller 101. Starting the linear motor 311 drives the shielding plate 39 to rise to open the exhaust hole 312 to quickly discharge the hot air and cold air.,

[0023] Among them, it also includes a controller 101, which is arranged at the right end of the front side of the box body 1. The input ends of the vibration motor 8 and the hysteresis brake 12 are electrically connected to the output end of the controller 101, the output end of the torque and speed sensor 9 is electrically connected to the input end of the controller 101, and the input end of the controller 101 is electrically connected to the output end of an external power supply. A coupling 10 is provided to connect and install the torque and speed sensor 9 and the hysteresis brake 12. The torque and speed sensor 9 can be installed on the output shaft of the vehicle steering motor, so as to accurately simulate the dynamic load change of the EPS system and monitor data in real time. The vibration motor 8 cooperates with the combination of the damping rod 5 and the spring 6 to reproduce the road excitation during vehicle driving, so as to detect the torque fluctuation and mechanical reliability of the motor under vibration conditions. It also includes a display screen 13 and an audible and visual alarm 14. The display screen 13 is installed on the front side of the box cover 4. There are two audible and visual alarms 14, which are installed on the front side of the top surface of the box shell 1 in a left-right corresponding manner. The input ends of the display screen 13 and the audible and visual alarm 14 are electrically connected to the output end of the controller 101. The display screen 13 can display the detected data in real time, and when a problem is detected, the audible and visual alarm 14 will flash and alarm in time to remind personnel to check. It also includes a lighting lamp 15 and an observation window 16. There are two lighting lamps 15, which are respectively installed on the left and right side surfaces inside the box shell 1. The observation window 16 is installed on the top surface of the box cover 4. The input end of the lighting lamp 15 is electrically connected to the output end of the controller 101. The lighting lamp 15 provides lighting inside the box shell 1. The provided observation window 16 facilitates visual inspection by personnel to reduce the number of times of opening the box. It also includes a fixed rod 17 and a handle 18. There are two fixed rods 17, which are respectively rotatably installed at both ends of the rear side of the top surface of the box shell 1. The bottom surface of the fixed rod 17 is in contact with the top surface of the box cover 4. The handle 18 is installed at the bottom end of the front side of the box cover 4. The provided fixed rod 17 is used to prevent the box cover 4 from being accidentally opened. It also includes a temperature sensor 19, which is fixedly installed at the bottom end of the front side of the box shell 1. The output end of the temperature sensor 19 is electrically connected to the input end of the controller 101. The temperature sensor 19 detects the temperature inside the box shell 1 to determine whether the temperature of the simulation test is within a suitable range.

[0024] The working principle of the automobile steering motor performance testing device provided by the present invention is as follows: first, the automobile steering motor is placed on the top surface of the fixed plate 24, the main motor 21 is started to drive the main screw 22 to rotate to drive the fixed plate 24 to rise and fall to adjust the height of the motor, and the auxiliary motor 26 drives the auxiliary screw 27 to rotate to drive the motor fixing frame 25 to clamp motors of different specifications, and the coupling 10 is set to connect and install the torque speed sensor 9 and the hysteresis brake 12. The torque speed sensor 9 can be installed on the output shaft of the automobile steering motor, which can accurately simulate the dynamic load changes of the EPS system and perform real-time data monitoring. The vibration motor 8 cooperates with the combination of the damping rod 5 and the spring 6 to reproduce the road excitation during vehicle driving to detect the torque fluctuation of the motor under vibration conditions. and mechanical reliability, at the same time, a heating tube 36 is used to cooperate with a fan 31 to circulate hot air to increase the temperature inside the box shell 1, so as to simulate a high-temperature environment to test the heat dissipation performance of the motor and the risk of high-temperature demagnetization, and a semiconductor refrigerator 38 is used to cooperate with the fan 31 to circulate cold air to reduce the temperature inside the box shell 1, so as to test the starting torque and operating stability of the motor at low temperatures. After the test is completed, the linear motor 311 is started to drive the baffle 39 to rise and open the exhaust hole 312 to quickly discharge the hot air and cold air. The lighting lamp 15 provides lighting to the inside of the box shell 1, and the observation window 16 is provided to facilitate visual inspection by personnel to reduce the number of unpacking times. The installed display screen 13 can display the detection data in real time, and when a problem occurs in the detection, the sound and light alarm 14 will flash in time to remind personnel to check.

[0025] It is worth noting that the controller 101 disclosed in the above embodiment uses the cRIO-9045 model. The hysteresis brake 12 can be freely configured according to the actual application scenario. The recommended hysteresis brake is the HB-840 model. The torque and speed sensor 9 can be a TMB-302 model, and the semiconductor cooler 38 can be a TETechnology CP-200 model. The controller 101 controls the main motor 21, auxiliary motor 26, hydraulic rod 212, fan 31, thermostat 35, semiconductor cooler 38, linear electrode 311, vibration motor 8, torque and speed sensor 9, hysteresis brake 12, display 13, sound and light alarm 14, lighting 15, and temperature sensor 19 using methods commonly used in the prior art.

[0026] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An automotive steering motor performance testing device, characterized in that: It includes a box shell (1) and a torque and speed sensor (9); Box shell (1): A box cover (4) is hinged to the rear side of the top surface. At the four corners of the inner bottom surface of the box shell (1), damping rods (5) are fixed. A spring (6) is sleeved on the outer side of the damping rod (5). The top end of the damping rod (5) is connected to a corner of the bottom surface of the test bench (7). The top end of the spring (6) is connected to the bottom surface of the test bench (7), and the bottom end of the spring (6) is connected to the inner bottom surface of the box shell (1). Vibration motors (8) are installed on both the left and right sides of the top surface of the test bench (7). The torque and speed sensor (9) is fixed in the middle of the top surface of the test bench (7). A hysteresis brake (12) is fixed to the rear side of the top surface of the test bench (7). The output shaft of the hysteresis brake (12) is correspondingly installed with the rear end of a coupling (10). The front end of the coupling (10) is correspondingly installed with the output end of the torque and speed sensor (9). An adjustment unit (2) is provided on the top surface of the test bench (7), and a simulation unit (3) is provided on the side surface of the box shell (1); Among them, it also includes a controller (101). The controller (101) is arranged at the right end of the front side surface of the box body (1). The input ends of the vibration motors (8) and the hysteresis brake (12) are electrically connected to the output end of the controller (101). The output end of the torque and speed sensor (9) is electrically connected to the input end of the controller (101). The input end of the controller (101) is electrically connected to the output end of an external power supply.

2. The automotive steering motor performance testing device according to claim 1, characterized in that: The adjustment unit (2) includes a main motor (21), a main lead screw (22), a lifting frame (23), a fixing plate (24), a motor fixing frame (25), a sub-motor (26), a sub-lead screw (27), and a bracket (28). The main motor (21) is fixed to the front side of the top surface of the test bench (7). The output shaft of the main motor (21) is connected to the top end of the main lead screw (22). The main lead screw (22) is threadedly connected to the threaded hole on the surface of the lifting frame (23). The lifting frame (23) is slidably connected to the through groove on the surface of the test bench (7). The top ends on both sides of the lifting frame (23) are respectively connected to the bottom surface of the fixing plate (24). The top surface of the fixing plate (24) is evenly distributed with brackets (28). Sub-motors (26) are fixed to both the left and right side surfaces of the bracket (28). The output shaft of the sub-motor (26) is connected to the end of the sub-lead screw (27). The sub-lead screw (27) is threadedly connected to the threaded hole on the surface of the motor fixing frame (25). The motor fixing frame (25) is slidably attached to the top surface of the fixing plate (24). The input ends of the main motor (21) and the sub-motor (26) are electrically connected to the output end of the controller (101).

3. The automotive steering motor performance testing device according to claim 2, wherein: The adjusting unit (2) further includes anti-slip strips (29), a pressing plate (210), a rubber pad (211), and a hydraulic rod (212). The anti-slip strips (29) are evenly distributed on the inner side surface of the motor fixing bracket (25). There are two hydraulic rods (212), which are respectively fixed to the middle of the outer side surfaces of the corresponding two motor fixing brackets (25). The top end of the hydraulic rod (212) is connected to the bottom surface of the pressing plate (210). A rubber pad (211) is bonded to the bottom surface of the pressing plate (210). The input end of the hydraulic rod (212) is electrically connected to the output end of the controller (101).

4. The automotive steering motor performance testing device according to claim 1, characterized in that: The simulation unit (3) includes a blower (31), a heating shell (32), a machine base (33), a magnetic sealing strip (34), a temperature controller (35), a heating pipe (36), a magnetic plate (37), and a semiconductor refrigerator (38). The heating shell (32) is fixed to the left side surface of the box shell (1). The right side surface of the heating shell (32) communicates with the left side surface of the box shell (1) through ventilation holes. Machine bases (33) are fixed to both sides of the surface of the heating shell (32). The blower (31) is placed inside the machine base (33). A magnetic sealing strip (34) is fixed to the front side surface of the heating shell (32). A heating pipe (36) is installed on the rear side surface of the magnetic plate (37). The heating pipe (36) is slidably installed inside the heating shell (32). The temperature controller (35) is installed at the left end of the front side surface of the box shell (1). The semiconductor refrigerator (38) is fixed to the right side surface inside the box shell (1). The heat dissipation end of the semiconductor refrigerator (38) is located on the right side surface of the box shell (1). The input ends of the heating pipe (36) and the semiconductor refrigerator (38) are electrically connected to the output end of the temperature controller (35). The input ends of the temperature controller (35) and the blower (31) are electrically connected to the output end of the controller (101).

5. The automotive steering motor performance testing device according to claim 4, characterized in that: The simulation unit (3) further includes a baffle plate (39), a placement groove (310), a linear motor (311), and exhaust holes (312). The exhaust holes (312) are evenly opened on the rear side surface of the box shell (1). There are two placement grooves (310), which are respectively opened at the left and right ends of the rear side surface of the box shell (1). A linear motor (311) is fixed inside the placement groove (310). The rear side surface of the moving element seat of the linear motor (311) is connected to one end of the front side surface of the baffle plate (39). The baffle plate (39) is attached to the rear side surface of the box shell (1). The input end of the linear motor (311) is electrically connected to the output end of the controller (101).

6. The automotive steering motor performance testing device according to claim 1, wherein: It further includes a display screen (13) and an audible and visual alarm (14). The display screen (13) is installed on the front side surface of the box cover (4). There are two audible and visual alarms (14), which are installed on the front side of the top surface of the box shell (1) in a left-right corresponding manner. The input ends of the display screen (13) and the audible and visual alarm (14) are electrically connected to the output end of the controller (101).

7. The automotive steering motor performance testing device according to claim 1, characterized in that: It also includes a lighting lamp (15) and an observation window (16). There are two lighting lamps (15) which are respectively installed on the left and right side surfaces inside the box shell (1). The observation window (16) is installed on the top surface of the box cover (4). The input end of the lighting lamp (15) is electrically connected to the output end of the controller (101).

8. The automotive steering motor performance testing device according to claim 1, characterized in that: It also includes a fixing rod (17) and a grip (18). There are two fixing rods (17) which are respectively rotatably installed at both ends of the rear side of the top surface of the box shell (1). The bottom surface of the fixing rod (17) is in contact with the top surface of the box cover (4). The grip (18) is installed at the bottom end of the front side of the box cover (4).

9. The automotive steering motor performance testing device according to claim 1, characterized in that: It also includes a temperature sensor (19). The temperature sensor (19) is fixedly installed at the bottom end of the front side of the box shell (1). The output end of the temperature sensor (19) is electrically connected to the input end of the controller (101).

10. Method for using an automotive steering motor performance testing device, characterized in that: It includes the following steps: 1): Start the main motor (21) to drive the main lead screw (22) to rotate to adjust the height of the lifting frame (23). Start the auxiliary motor (26) to drive the auxiliary lead screw (27) to rotate to adjust the spacing of the motor fixing bracket (25) to install motors of different sizes, and install the motor shaft of the motor to be tested on the torque and speed sensor (9). At the same time, start the hydraulic rod (212) to press down the pressing plate (210) to firmly fix the motor to prevent it from falling off during the motor test; 2): Start the controller (101) to select no-load or load test. Apply a load to the hysteresis brake (12) set. The torque and speed sensor (9) records the data of the motor test. The vibration motor (8) cooperates with the spring (6) and the damping rod (5) to simulate the operation of the motor in the vibration environment during vehicle driving; 3): Use the temperature controller (35) to set the target temperature for high-temperature test. The heating tube (36) starts to heat and cooperates with the blower (31) to circulate hot air to make the inside of the box shell (1) reach a high temperature to test the influence on the motor performance. At the same time, the temperature controller (35) can also be used to set the target temperature for low-temperature test. Start the semiconductor refrigerator (38) to refrigerate and start the blower (31) to circulate cold air at the same time to test the operation of the motor at low temperature.

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