New energy vehicle short shaft performance test process

Abstract

The application discloses a new energy automobile short shaft performance test process and belongs to the technical field of automobile part detection. The process comprises the following steps: step one, sample clamping; step two, paint spraying and marking; step three, constant torque test: a driving mechanism and a driven mechanism control the relative constant torque of two clamps and synchronously rotate; step four, result comparison; step five, dynamic torque test; step six, simulation heating test; step seven, starting torque test; step eight, emergency stop torque test; step nine, fatigue torque test; and step ten, static torque test. The application can comprehensively evaluate the performance of the short shaft under actual working conditions by the different states and environments of the new energy automobile short shaft in the use process, such as temperature change, working load fluctuation and the like. The process is completed by adopting an integrated structure, the short shaft does not need to be turned over and clamped repeatedly in the detection process, and the errors caused by multiple clamping can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts detection, and in particular to a short-axle performance testing process for new energy vehicles. Background Art

[0002] In recent years, with increasing global pressure for environmental protection, new energy vehicles (NEVs) have become a key development direction in the automotive industry. NEVs, including pure electric vehicles (EVs), plug-in hybrid electric vehicles (PHEVs), and fuel cell vehicles (FCEVs), differ significantly from traditional internal combustion engine vehicles in terms of powertrain, drive mode, and energy storage. These differences require higher performance standards for key NEV components, including the stub axle (typically referred to as the drive shaft or propeller shaft), to ensure the stability, efficiency, and reliability of the vehicle's power transmission system. The stub axle's primary functions in NEVs include transmitting power, supporting loads, and withstanding high-speed rotation. With the widespread adoption of electric drive technology and changes in vehicle design, NEV powertrains no longer rely solely on traditional internal combustion engines, but instead utilize electric motor drive systems to directly drive the vehicle's axles. The high speeds, high torque, and immediate response characteristics of electric drive systems place even higher demands on the stub axle's performance. Therefore, as a crucial component of the powertrain, the performance of the stub axle directly impacts the vehicle's overall driving efficiency, comfort, and safety.

[0003] In the electric drive system of new energy vehicles, the short axle is responsible for transmitting torque from the motor to the wheels, ensuring that electrical energy can be efficiently converted into driving force. The high torque output of the motor requires the short axle to have sufficient strength and rigidity to avoid fatigue damage under high-load conditions such as acceleration, deceleration, and hill starting.

[0004] With the continuous advancement of new energy vehicle technology and its widespread market adoption, the performance requirements for short axles are becoming increasingly stringent, and their operating environments and conditions are becoming more complex. Due to the high speeds and instantaneous high torque output of electric motors, short axles often face more demanding operating conditions than traditional vehicles. For example, the instantaneous high torque at motor startup, power transmission during stable high-speed operation, the thermal effects of prolonged high-speed operation, and adaptability to diverse environmental conditions all pose significant challenges to the performance of short axles.

[0005] A stub axle failure not only prevents the vehicle from driving properly but can also pose a serious safety hazard. To ensure that the powertrain of new energy vehicles can operate stably and reliably under various operating conditions, comprehensive and systematic stub axle performance testing is crucial.

[0006] However, current conventional testing methods struggle to simulate the complex operating conditions of new energy vehicles. Traditional stub shaft testing typically operates within a relatively low speed range, failing to effectively simulate the high-speed operation of the electric motor and its impact on the stub shaft. In electric drive systems, torque fluctuations are particularly dramatic. Instantaneous load changes can cause fatigue cracks or other forms of failure in the stub shaft, a risk that traditional testing methods struggle to uncover. Traditional stub shaft testing typically operates under static loads, focusing on long-term durability and basic strength testing. However, the operating environment of new energy vehicle stub shafts is far more complex than static conditions. Under dynamic conditions such as high-speed driving, aggressive acceleration, frequent braking, climbing, or starting on steep slopes, the stub shaft must withstand rapidly changing loads. Conventional testing equipment and processes are unable to effectively simulate the combined effects of these dynamic loads and complex environments on the stub shaft. Due to the high power output of the electric motor and the high loads on the stub shaft, prolonged operation in high-temperature environments can lead to thermal effects on the stub shaft, resulting in changes in material properties and even thermal fatigue. Conventional testing methods often utilize standard ambient temperature conditions, failing to simulate the heat buildup caused by the high motor speeds, high loads, and inadequate heat dissipation during actual driving of new energy vehicles. Thermal fatigue can cause surface cracks on the short shaft and reduce its strength, which in turn affects its service life and safety. Traditional testing methods require the use of multiple test equipment for separate testing, which requires the short shaft to be circulated and repeatedly clamped between multiple test equipment during the test process, resulting in a long test cycle. Therefore, we propose a new energy vehicle short shaft performance testing process to solve this problem. Summary of the Invention

[0007] The purpose of the present invention is to provide a new energy vehicle short-axle performance testing process to solve the problems raised in the above background technology.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A new energy vehicle short axle performance testing process comprises the following steps:

[0010] Step 1: Sample clamping: The first cylinder on the drive mechanism controls the horizontal movement of the first movable table to place the short shaft to be tested between the two fixtures. The first movable table is then controlled to reset, and the multiple clamping plates on the fixtures are controlled to move closer to each other to clamp the two ends of the short shaft to be tested.

[0011] Step 2: Paint marking: The electric push rod on the paint spraying mechanism drives the paint spraying head to move horizontally, and the paint spraying head sprays paint on the short shaft to be tested, so that a horizontal strip paint mark is formed on the surface of the short shaft to be tested. The short shaft to be tested is controlled to rotate by the driving mechanism and the driven mechanism, so that a circular horizontal strip paint mark with equal spacing is formed on the outer surface of the short shaft to be tested. The high-speed camera captures the image of the short shaft to be tested and obtains the standard pattern;

[0012] Step 3: Constant torque test: The driving mechanism and the driven mechanism control the relative constant torque of the two fixtures and rotate synchronously;

[0013] Step 4: Result comparison: The high-speed camera captures an image of the short shaft to be tested, generates a test pattern, and transmits it to the control panel. The control panel compares the test pattern with the standard pattern to obtain the torsional deformation value. The torque value of the short shaft to be tested is monitored by the torque sensor on the drive mechanism, and the comparison data and torque data are displayed on the control panel respectively.

[0014] Step 5: Dynamic torque test: The driving mechanism and the driven mechanism control the two fixtures to generate varying torque and control the two fixtures to rotate synchronously, repeating step 4.

[0015] Step 6: Simulated heating test: The electromagnetic heating mechanism heats the short shaft to be tested, and the driving mechanism and the driven mechanism control the two fixtures to generate variable torque and control the two fixtures to rotate synchronously at different speeds. The speed monitoring mechanism monitors the speed of the short shaft to be tested and synchronously controls the electromagnetic heating mechanism to heat the short shaft to be tested to different degrees to simulate real operating conditions. The infrared temperature detector monitors the temperature of the short shaft to be tested. Repeat step 4 separately to obtain multiple sets of repeated data.

[0016] Step 7: Start torque test: The second cylinder on the driven mechanism controls the socket to disengage from the plug connector, and the driving mechanism controls the fixture to rapidly accelerate and rotate at high speed under static conditions, and repeat step 4;

[0017] Step 8. Emergency stop torque test: The driving mechanism controls the fixture to stop instantly and repeat step 4;

[0018] Step 9, fatigue torque test: the driving mechanism controls the reciprocating rotation of the fixture and repeats step 4 to obtain multiple sets of data;

[0019] Step 10: Static torque test: The second cylinder on the driven mechanism controls the pin to be inserted into the plug connector. The driving mechanism provides a torsional force to the fixture, causing the short shaft to generate torque, and repeat step 4.

[0020] Preferably, in step 1, the driving mechanism includes:

[0021] a first movable platform, wherein a first guide rail is slidably connected to a bottom of the first movable platform;

[0022] a fixed plate, a first cylinder fixedly mounted on one side of the fixed plate, an output end of the first cylinder fixedly mounted on one side of the first movable platform;

[0023] A torque sensor, wherein the output end of the torque sensor is fixedly connected to a drive shaft;

[0024] A first servo motor and a torque sensor are both fixedly mounted on the top of the first moving platform.

[0025] Preferably, in step three, the driven mechanism includes:

[0026] A second movable platform, wherein a second guide rail is slidably mounted on the bottom of the second movable platform, a bracket and a second servo motor are fixedly mounted on the top of the second movable platform, a latch is fixedly mounted on the other end of the bracket, and a socket is fixedly mounted on the output end of the second servo motor;

[0027] A fixed base, a second cylinder being fixedly mounted on one side of the fixed base, and an output end of the second cylinder being fixedly mounted on one side of the second movable platform;

[0028] A driven shaft has a plug connector fixedly mounted on one end of the driven shaft, the plug connector is movably plugged into the socket, and the latch is adapted to the plug connector, and a counterweight ring is fixedly sleeved on the outer side of the driven shaft.

[0029] Preferably, in step 1, the clamp comprises:

[0030] A mounting plate, wherein a plurality of mounting plates are fixedly mounted on one side of the mounting plate, and a threaded column is fixedly mounted on the other side of the mounting plate;

[0031] Clamping plates, the clamping plates are arranged in multiple groups, and the sides of the multiple groups of clamping plates that are away from each other are hinged with linkage rods, and the other ends of the linkage rods are hinged on the mounting plate;

[0032] A drive ring, one side of which is hinged with a plurality of arc-shaped connecting rods, the other end of which is hinged on a corresponding linkage rod, and the other side of which is fixedly mounted with a plurality of guide rods, the drive ring being slidably sleeved on the outside of the guide rods;

[0033] A threaded collar, wherein the threaded collar is threadably sleeved on the outer side of the threaded column, and the drive ring is rotatably sleeved on the outer side of the threaded collar;

[0034] A connecting ring, one side of which is fixedly mounted with a plurality of positioning rods and a plurality of connecting springs, the positioning rods being movably inserted into the interior of the threaded collar and the driving ring, and the other end of the connecting spring being fixedly connected to the threaded collar.

[0035] Preferably, the clamps are provided in two groups, and the two mounting plates are fixedly mounted on the other end of the driven shaft and the other end of the driving shaft respectively, and positioning plates are rotatably sleeved on the outer sides of the driving shaft and the driven shaft.

[0036] Preferably, in step 2, the paint spraying mechanism includes:

[0037] A paint spray head, wherein a movable seat is fixedly mounted on the rear side of the paint spray head, a spray pump is fixedly mounted on the top of the movable seat, and a discharge port of the spray pump is connected to the paint spray head;

[0038] Vertical plates, the vertical plates are arranged in two groups, a crossbeam is fixedly installed between the two groups of vertical plates, the movable seat is slidably sleeved on the outside of the crossbeam, a screw rod is rotatably installed between the two groups of vertical plates, and the movable seat is threadedly sleeved on the outside of the screw rod;

[0039] A drive motor is fixedly mounted on one side of one of the vertical plates, and an output shaft of the drive motor is fixedly mounted on one end of the screw rod.

[0040] Preferably, in step six, the electromagnetic heating mechanism includes:

[0041] An electromagnetic heating coil, wherein the electromagnetic heating coil is arranged outside the short shaft to be tested;

[0042] An electric push rod, a mounting rod is fixedly installed at the bottom of the electric push rod, a movable frame is fixedly installed on the output end of the electric push rod, the electromagnetic heating coil is passed through the movable frame, and a slide rail is slidably installed at the bottom of the movable frame.

[0043] Preferably, in step six, the speed monitoring mechanism includes:

[0044] A connecting shaft, wherein a rotating frame is fixedly sleeved on the outer side of the connecting shaft, and a plurality of counterweight plates are slidably mounted on the inner side of the rotating frame, and the two ends of the connecting shaft are fixedly connected to the output end of the first servo motor and the input end of the torque sensor respectively;

[0045] An oblique frame, wherein the oblique frame is slidably sleeved on the outside of the connecting shaft, the counterweight plate is slidably sleeved on the outside of the oblique frame, and a connecting cylinder is fixedly installed on one side of the oblique frame;

[0046] A test plate, wherein the connecting cylinder is rotatably mounted in the test plate;

[0047] A baffle is provided, wherein a varistor is fixedly installed between the baffle and the test board, and the varistor is connected in series with the electromagnetic heating coil and is connected to the alternating circuit.

[0048] Preferably, in step four, the control panel and the bottom of the high-speed camera are fixedly mounted on the same base, and the first guide rail, mounting rod, second guide rail, fixing plate, fixing seat and vertical plate are all fixedly mounted on the top of the base.

[0049] Preferably, in step six, the infrared temperature detector is fixedly mounted on the top of the base, and the infrared temperature detector is connected to the control panel signal.

[0050] The beneficial effects of the present invention are:

[0051] 1. In the present invention, the short-axle performance testing process for new energy vehicles comprises the following steps: in step 1, the two ends of the short-axle to be tested are clamped by a fixture, the self-locking property of the threaded fit between the threaded collar and the threaded column is used to improve the clamping stability, and the provided connecting ring, positioning rod and connecting spring are used to lock the rotation of the threaded collar to prevent loosening, thereby improving the clamping stability of the short-axle and ensuring the accuracy of subsequent tests;

[0052] 2. In the present invention, the new energy vehicle short axle performance testing process described above comprises the following steps: in step 2, a spray paint mechanism forms annular, evenly spaced, horizontal stripe paint marks on the outer surface of the short axle to be tested, and a high-speed camera is used to capture images to facilitate intuitive observation, analysis, and comparison of the torsional deformation of the short axle;

[0053] 3. In the present invention, the short-axle performance testing process for new energy vehicles is characterized by simulating the performance of the short-axle under constant torque in step three, and intuitively observing and analyzing the short-axle performance in step four by using a high-speed camera in conjunction with a control panel and a torque sensor;

[0054] 4. In the present invention, the short-axle performance testing process for new energy vehicles can simulate the normal operation environment of the short-axle by performing dynamic torque testing and simulated heating testing, simulate the rapid start-up environment of new energy vehicles by performing starting torque testing, simulate the emergency braking environment of new energy vehicles by performing emergency stop torque testing, monitor the performance of the short-axle under continuous alternating torque by performing static torque testing, and detect the ultimate torque that the short-axle can withstand by performing static torque testing;

[0055] 5. In the present invention, in the process for testing the performance of a stub axle of a new energy vehicle, in step 6, an electromagnetic heating mechanism is provided to simulate the temperature rise of the stub axle during actual use. An infrared temperature detector monitors the temperature of the stub axle to be tested, thereby testing the performance of the stub axle under different temperature conditions. A speed monitoring mechanism is provided to automatically adjust the current in the electromagnetic heating mechanism according to the stub axle speed, heating the stub axle to a corresponding degree, simulating the actual environment of the stub axle and achieving accurate performance testing.

[0056] 6. In the present invention, the short-axle performance testing process for new energy vehicles can comprehensively evaluate the performance of the short-axle under actual working conditions through the different states and environments of the short-axle of new energy vehicles during use, such as temperature changes and fluctuations in workload. The process is completed using an integrated structure, and the short-axle does not need to be rotated or repeatedly clamped during the detection process, thereby avoiding errors that may be caused by multiple clamping, ensuring the accuracy and consistency of the measurement, reducing manual operations in the detection process, and improving the level of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic diagram of the process flow of the present invention;

[0058] Figure 2 A schematic diagram of the three-dimensional structure of the present invention;

[0059] Figure 3 It is a schematic cross-sectional view of the present invention;

[0060] Figure 4 for Figure 3 A partial enlarged view of part A;

[0061] Figure 5 for Figure 3 A partial enlarged view of part B;

[0062] Figure 6 This is a schematic side cross-sectional view of a new energy vehicle short-axle performance testing process proposed by the present invention;

[0063] Figure 7 A schematic diagram of the three-dimensional structure of the clamp proposed in the present invention;

[0064] Figure 8 This is a schematic diagram of the exploded three-dimensional structure of the clamp proposed by the present invention;

[0065] Figure 9 This is a schematic diagram of the three-dimensional structure of the paint spraying mechanism proposed in the present invention;

[0066] Figure 10 This is a schematic diagram of the three-dimensional structure of the electromagnetic heating mechanism proposed in the present invention;

[0067] Figure 11 This is a schematic diagram of the three-dimensional structure of the speed monitoring mechanism proposed in the present invention.

[0068] In the figure: 1. Base; 101. Positioning plate; 2. Clamp; 201. Mounting plate; 202. Mounting plate; 203. Linkage rod; 204. Arc connecting rod; 205. Drive ring; 206. Threaded column; 207. Threaded collar; 208. Connecting ring; 209. Positioning rod; 210. Connecting spring; 211. Clamping plate; 3. Paint spraying mechanism; 301. Vertical plate; 302. Crossbeam; 303. Moving seat; 304. Paint spraying head; 305. Spraying pump; 306. Screw; 307. Drive motor; 4. Drive mechanism; 401. First moving platform; 402. First cylinder; 403. Fixed plate; 404. First guide rail; 405. First servo motor; 406. Torque sensor; 407. Drive shaft; 5. Driven mechanism; 501, second moving platform; 502, second cylinder; 503, second guide rail; 504, second servo motor; 505, bracket; 506, socket; 507, plug connector; 508, latch; 509, driven shaft; 510, counterweight ring; 6, speed monitoring mechanism; 601, connecting shaft; 602, rotating frame; 603, counterweight plate; 604, inclined frame; 605, connecting tube; 606, test plate; 607, varistor; 608, baffle; 7, high-speed camera; 8, control panel; 9, electromagnetic heating mechanism; 901, electromagnetic heating coil; 902, moving frame; 903, slide rail; 904, electric push rod; 905, mounting rod; 10, short shaft to be tested; 11, infrared temperature detector. DETAILED DESCRIPTION

[0069] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0070] Reference Figure 1 - Figure 11 , a new energy vehicle short axle performance testing process, comprising the following steps:

[0071] Step 1: Sample clamping: The first cylinder 402 on the drive mechanism 4 controls the horizontal movement of the first movable platform 401 to place the short shaft 10 to be tested between the two clamps 2. The first movable platform 401 is then controlled to reset and the multiple clamping plates 211 on the clamps 2 are controlled to move closer together to clamp the two ends of the short shaft 10 to be tested.

[0072] Step 2: Paint marking: The electric push rod 904 on the paint spraying mechanism 3 drives the paint spraying head 304 to move horizontally, and the paint spraying head 304 sprays paint onto the short shaft 10 to be tested, so that a horizontal strip paint mark is formed on the surface of the short shaft 10 to be tested. The short shaft 10 to be tested is controlled to rotate by the driving mechanism 4 and the driven mechanism 5, so that a circular horizontal strip paint mark with equal spacing is formed on the outer surface of the short shaft 10 to be tested. The high-speed camera 7 captures the image of the short shaft 10 to be tested and obtains a standard pattern;

[0073] Step 3: Constant torque test: the driving mechanism 4 and the driven mechanism 5 control the two fixtures 2 to have a relatively constant torque and rotate synchronously;

[0074] Step 4: Result comparison: The high-speed camera 7 captures an image of the short shaft 10 to be tested, obtains a test pattern, and transmits it to the control panel 8. The control panel 8 compares the test pattern with the standard pattern to obtain a torsional deformation value. The torque value of the short shaft 10 to be tested is monitored by the torque sensor 406 on the drive mechanism 4, and the comparison data and torque data are displayed on the control panel 8 respectively.

[0075] Step 5: Dynamic torque test: The driving mechanism 4 and the driven mechanism 5 control the two fixtures 2 to generate a variable torque and control the two fixtures 2 to rotate synchronously, and repeat step 4;

[0076] Step 6, simulated heating test: the electromagnetic heating mechanism 9 heats the short shaft 10 to be tested, and the driving mechanism 4 and the driven mechanism 5 control the two clamps 2 to generate a variable torque and control the two clamps 2 to rotate synchronously at different speeds. The speed monitoring mechanism 6 monitors the speed of the short shaft 10 to be tested and synchronously controls the electromagnetic heating mechanism 9 to heat the short shaft 10 to be tested to different degrees to simulate the actual operation condition. The infrared temperature detector 11 monitors the temperature of the short shaft 10 to be tested, and step 4 is repeated to obtain multiple sets of repeated data.

[0077] Step 7: Start torque test: The second cylinder 502 on the driven mechanism 5 controls the socket 506 to disengage from the plug connector 507. The driving mechanism 4 controls the fixture 2 to rapidly accelerate and rotate at high speed in a static state, and repeat step 4.

[0078] Step 8, emergency stop torque test: the driving mechanism 4 controls the clamp 2 to stop instantly, and repeats step 4;

[0079] Step 9, fatigue torque test: the driving mechanism 4 controls the fixture 2 to rotate back and forth, and repeats step 4 to obtain multiple sets of data;

[0080] Step 10, static torque test: the second cylinder 502 on the driven mechanism 5 controls the pin 508 to be inserted into the plug connector 507, and the driving mechanism 4 provides a torsional force to the fixture 2, so that the short shaft 10 to be tested generates torque, and step 4 is repeated.

[0081] In this embodiment, in step 1, the driving mechanism 4 includes:

[0082] A first movable platform 401, wherein the bottom of the first movable platform 401 is slidably connected to a first guide rail 404;

[0083] A fixed plate 403, a first cylinder 402 is fixedly mounted on one side of the fixed plate 403, and an output end of the first cylinder 402 is fixedly mounted on one side of the first movable platform 401;

[0084] A torque sensor 406 , with a drive shaft 407 fixedly connected to an output end of the torque sensor 406 ;

[0085] The first servo motor 405 , the first servo motor 405 and the torque sensor 406 are all fixedly mounted on the top of the first moving platform 401 .

[0086] In this embodiment, in step three, the driven mechanism 5 includes:

[0087] A second movable platform 501 is provided with a second guide rail 503 slidably mounted on the bottom of the second movable platform 501 , a bracket 505 and a second servo motor 504 are fixedly mounted on the top of the second movable platform 501 , a latch 508 is fixedly mounted on the other end of the bracket 505 , and a socket 506 is fixedly mounted on the output end of the second servo motor 504 ;

[0088] A fixed base, a second cylinder 502 is fixedly mounted on one side of the fixed base, and an output end of the second cylinder 502 is fixedly mounted on one side of the second movable platform 501;

[0089] The driven shaft 509 has a plug connector 507 fixedly mounted on one end thereof. The plug connector 507 is movably plugged into the socket 506 , and the latch 508 is adapted to the plug connector 507 . A counterweight ring 510 is fixedly sleeved on the outer side of the driven shaft 509 .

[0090] In this embodiment, in step 1, the clamp 2 includes:

[0091] A mounting plate 201, with a plurality of mounting plates 202 fixedly mounted on one side of the mounting plate 201 and a threaded post 206 fixedly mounted on the other side of the mounting plate 201;

[0092] The clamping plates 211 are arranged in multiple groups. The sides of the multiple groups of clamping plates 211 that are away from each other are hinged with a linkage rod 203, and the other end of the linkage rod 203 is hinged on the mounting plate 202;

[0093] A drive ring 205 is hinged on one side with multiple arc-shaped connecting rods 204, and the other end of the arc-shaped connecting rods 204 is hinged on the corresponding linkage rods 203. A plurality of guide rods are fixedly mounted on the other side of the mounting plate 201, and the drive ring 205 is slidably sleeved on the outside of the guide rods;

[0094] The threaded collar 207 is threadedly sleeved on the outer side of the threaded column 206, and the drive ring 205 is rotatably sleeved on the outer side of the threaded collar 207;

[0095] The connecting ring 208 has a plurality of positioning rods 209 and a plurality of connecting springs 210 fixedly installed on one side of the connecting ring 208. The positioning rods 209 are movably inserted into the interior of the threaded collar 207 and the driving ring 205. The other end of the connecting spring 210 is fixedly connected to the threaded collar 207. The positioning rods 209 can be pulled out of the driving ring 205 by pulling the connecting ring 208, and then the threaded collar 207 is rotated. The threaded collar 207 is driven by the threaded connection with the threaded column 206 to rotate and move closer to the mounting plate. 201 moves to one side and drives the driving ring 205 to approach the mounting plate 201. The driving ring 205 drives the linkage rod 203 to rotate through the arc-shaped connecting rod 204. The linkage rod 203 drives the clamping plate 211 to approach the short shaft 10 to be tested, thereby clamping the short shaft 10 to be tested. Then, the connecting ring 208 is loosened, so that the connecting ring 208 is reset under the action of the connecting spring 210, and drives the positioning rod 209 to be inserted into the driving ring 205, thereby locking the rotation of the threaded collar 207 and improving the fixing effect of the short shaft 10 to be tested.

[0096] In this embodiment, the clamp 2 is provided in two groups, and the two mounting plates 201 are fixedly mounted on the other end of the driven shaft 509 and the other end of the driving shaft 407 respectively. The outer sides of the driving shaft 407 and the driven shaft 509 are both rotatably sleeved with positioning plates 101.

[0097] In this embodiment, in step 2, the paint spraying mechanism 3 includes:

[0098] A paint spray head 304, a movable base 303 is fixedly mounted on the rear side of the paint spray head 304, a spray pump 305 is fixedly mounted on the top of the movable base 303, and a discharge port of the spray pump 305 is connected to the paint spray head 304;

[0099] Vertical plates 301 are provided in two groups. A crossbeam 302 is fixedly installed between the two groups of vertical plates 301. A movable seat 303 is slidably sleeved on the outside of the crossbeam 302. A screw rod 306 is rotatably installed between the two groups of vertical plates 301. The movable seat 303 is threadedly sleeved on the outside of the screw rod 306.

[0100] The drive motor 307 is fixedly mounted on one side of one of the vertical plates 301. The output shaft of the drive motor 307 is fixedly mounted on one end of the screw rod 306. The drive motor 307 drives the screw rod 306 to rotate. The screw rod 306 drives the movable seat 303 and the spray head to move horizontally through the threaded engagement with the movable seat 303. The spray pump 305 is started to guide the paint into the spray head for spraying.

[0101] In this embodiment, in step six, the electromagnetic heating mechanism 9 includes:

[0102] The electromagnetic heating coil 901 is arranged on the outside of the short shaft 10 to be tested;

[0103] An electric push rod 904 is provided with a mounting rod 905 fixedly mounted on the bottom of the electric push rod 904, a movable frame 902 is fixedly mounted on the output end of the electric push rod 904, the electromagnetic heating coil 901 is passed through the movable frame 902, and a slide rail 903 is slidably mounted on the bottom of the movable frame 902. Starting the electric push rod 904 can drive the movable frame 902 and the electromagnetic heating coil 901 to move horizontally.

[0104] In this embodiment, in step six, the speed monitoring mechanism 6 includes:

[0105] A connecting shaft 601 is fixedly sleeved with a rotating frame 602 on the outside of the connecting shaft 601, and a plurality of counterweight plates 603 are slidably mounted on the inside of the rotating frame 602. The two ends of the connecting shaft 601 are fixedly connected to the output end of the first servo motor 405 and the input end of the torque sensor 406 respectively;

[0106] The oblique frame 604 is slidably sleeved on the outside of the connecting shaft 601, and the counterweight plate 603 is slidably sleeved on the outside of the oblique frame 604. A connecting tube 605 is fixedly installed on one side of the oblique frame 604;

[0107] The test plate 606 and the connecting tube 605 are rotatably mounted in the test plate 606;

[0108] Baffle 608, a varistor 607 is fixedly installed between the baffle 608 and the test plate 606. When the connecting shaft 601 accelerates, it will drive the clamping to accelerate, so that the centrifugal force of the counterweight plate 603 toward the outside increases, thereby transmitting the centrifugal force to the lower frame through cooperation with the inclined frame 604, and applying extrusion force to the test plate 606 through the connecting tube 605, so that the extrusion force exerted on the varistor 607 increases. The varistor 607 is connected in series with the electromagnetic heating coil 901 and connected to the alternating circuit. Under the action of the alternating current, the current will be adjusted according to the resistance characteristics of the varistor 607. When the alternating current passes through the electromagnetic heating coil 901, the current change inside the electromagnetic heating coil 901 will generate a changing magnetic field in the surrounding space. The magnetic field generates eddy currents on the short shaft 10 to be tested through electromagnetic induction. The flow of eddy currents will be converted into heat energy due to the resistance effect, producing a heating effect. As the current increases, the intensity and efficiency of the electromagnetic heating will also increase.

[0109] In this embodiment, in step four, the bottom of the control panel 8 and the high-speed camera 7 are fixedly mounted with the same base 1, and the first guide rail 404, the mounting rod 905, the second guide rail 503, the fixing plate 403, the fixing seat and the vertical plate 301 are all fixedly mounted on the top of the base 1.

[0110] In this embodiment, in step six, the infrared temperature detector 11 is fixedly installed on the top of the base 1, and the infrared temperature detector 11 is connected to the control panel 8 by signal. The infrared temperature detector 11 can monitor the temperature of the short shaft 10 to be tested and transmit the information to the control panel 8.

[0111] In this embodiment, the performance of the short axle under actual working conditions can be comprehensively evaluated by measuring the different states and environments of the short axle of the new energy vehicle during use, such as temperature changes and fluctuations in workload. This is completed using an integrated structure, and the short axle does not need to be circulated and repeatedly clamped during the detection process, thereby avoiding errors that may be caused by multiple clamping, ensuring the accuracy and consistency of the measurement, reducing manual operations in the detection process, and improving the level of automation.

[0112] The above is a detailed introduction to a new energy vehicle short-axle performance test process provided by the present invention. Specific embodiments are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A new energy vehicle short axle performance testing process, characterized in that: The following steps are involved: Step 1: Sample clamping: The first cylinder on the drive mechanism controls the horizontal movement of the first movable table to place the short shaft to be tested between the two fixtures. The first movable table is then controlled to reset, and the multiple clamping plates on the fixtures are controlled to move closer to each other to clamp the two ends of the short shaft to be tested. Step 2: Paint marking: The electric push rod on the paint spraying mechanism drives the paint spraying head to move horizontally, and the paint spraying head sprays paint on the short shaft to be tested, so that a horizontal strip paint mark is formed on the surface of the short shaft to be tested. The short shaft to be tested is controlled to rotate by the driving mechanism and the driven mechanism, so that a circular horizontal strip paint mark with equal spacing is formed on the outer surface of the short shaft to be tested. The high-speed camera captures the image of the short shaft to be tested and obtains the standard pattern; Step 3: Constant torque test: The driving mechanism and the driven mechanism control the relative constant torque of the two fixtures and rotate synchronously; Step 4: Result comparison: The high-speed camera captures an image of the short shaft to be tested, generates a test pattern, and transmits it to the control panel. The control panel compares the test pattern with the standard pattern to obtain the torsional deformation value. The torque value of the short shaft to be tested is monitored by the torque sensor on the drive mechanism, and the comparison data and torque data are displayed on the control panel respectively. Step 5: Dynamic torque test: The driving mechanism and the driven mechanism control the two fixtures to generate varying torque and control the two fixtures to rotate synchronously, repeating step 4. Step 6: Simulated heating test: The electromagnetic heating mechanism heats the short shaft to be tested, and the driving mechanism and the driven mechanism control the two fixtures to generate variable torque and control the two fixtures to rotate synchronously at different speeds. The speed monitoring mechanism monitors the speed of the short shaft to be tested and synchronously controls the electromagnetic heating mechanism to heat the short shaft to be tested to different degrees to simulate real operating conditions. The infrared temperature detector monitors the temperature of the short shaft to be tested. Repeat step 4 separately to obtain multiple sets of repeated data. Step 7: Start torque test: The second cylinder on the driven mechanism controls the socket to disengage from the plug connector, and the driving mechanism controls the fixture to rapidly accelerate and rotate at high speed under static conditions, and repeat step 4; Step 8. Emergency stop torque test: The driving mechanism controls the fixture to stop instantly and repeat step 4; Step 9, fatigue torque test: the driving mechanism controls the reciprocating rotation of the fixture and repeats step 4 to obtain multiple sets of data; Step 10: Static torque test: The second cylinder on the driven mechanism controls the pin to be inserted into the plug connector. The driving mechanism provides a torsional force to the fixture, causing the short shaft to generate torque, and repeat step 4. In step six, the electromagnetic heating mechanism includes: an electromagnetic heating coil, and the speed monitoring mechanism includes: a connecting shaft, an inclined frame, a test plate and a baffle. A rotating frame is fixedly sleeved on the outer side of the connecting shaft, and a plurality of counterweight plates are slidably installed on the inner side of the rotating frame. A varistor is fixedly installed between the baffle and the test plate. The varistor is connected in series with the electromagnetic heating coil and is connected to the alternating circuit.

2. The new energy vehicle short axis performance testing process according to claim 1, characterized in that: In the step 1, the driving mechanism includes: a first movable platform, wherein a first guide rail is slidably connected to a bottom of the first movable platform; a fixed plate, a first cylinder fixedly mounted on one side of the fixed plate, an output end of the first cylinder fixedly mounted on one side of the first movable platform; A torque sensor, wherein the output end of the torque sensor is fixedly connected to a drive shaft; A first servo motor and a torque sensor are both fixedly mounted on the top of the first moving platform.

3. The new energy vehicle short axis performance testing process according to claim 2, characterized in that: In step three, the driven mechanism includes: A second movable platform, wherein a second guide rail is slidably mounted on the bottom of the second movable platform, a bracket and a second servo motor are fixedly mounted on the top of the second movable platform, a latch is fixedly mounted on the other end of the bracket, and a socket is fixedly mounted on the output end of the second servo motor; A fixed base, a second cylinder being fixedly mounted on one side of the fixed base, and an output end of the second cylinder being fixedly mounted on one side of the second movable platform; A driven shaft has a plug connector fixedly mounted on one end of the driven shaft, the plug connector is movably plugged into the socket, and the latch is adapted to the plug connector, and a counterweight ring is fixedly sleeved on the outer side of the driven shaft.

4. The new energy vehicle short axis performance testing process according to claim 3 is characterized in that: In the step 1, the fixture includes: A mounting plate, wherein a plurality of mounting plates are fixedly mounted on one side of the mounting plate, and a threaded column is fixedly mounted on the other side of the mounting plate; Clamping plates, the clamping plates are arranged in multiple groups, and the sides of the multiple groups of clamping plates that are away from each other are hinged with linkage rods, and the other ends of the linkage rods are hinged on the mounting plate; A drive ring, one side of which is hinged with a plurality of arc-shaped connecting rods, the other end of which is hinged on a corresponding linkage rod, and the other side of which is fixedly mounted with a plurality of guide rods, the drive ring being slidably sleeved on the outside of the guide rods; A threaded collar, wherein the threaded collar is threadably sleeved on the outer side of the threaded column, and the drive ring is rotatably sleeved on the outer side of the threaded collar; A connecting ring, one side of which is fixedly mounted with a plurality of positioning rods and a plurality of connecting springs, the positioning rods being movably inserted into the interior of the threaded collar and the driving ring, and the other end of the connecting spring being fixedly connected to the threaded collar.

5. The new energy vehicle short axis performance testing process according to claim 4 is characterized in that: The clamps are provided in two groups, and the two mounting plates are fixedly mounted on the other end of the driven shaft and the other end of the driving shaft respectively. Positioning plates are rotatably sleeved on the outer sides of the driving shaft and the driven shaft.

6. The new energy vehicle short axis performance testing process according to claim 5, characterized in that: In the step 2, the paint spraying mechanism includes: A paint spray head, wherein a movable seat is fixedly mounted on the rear side of the paint spray head, a spray pump is fixedly mounted on the top of the movable seat, and a discharge port of the spray pump is connected to the paint spray head; Vertical plates, the vertical plates are arranged in two groups, a crossbeam is fixedly installed between the two groups of vertical plates, the movable seat is slidably sleeved on the outside of the crossbeam, a screw rod is rotatably installed between the two groups of vertical plates, and the movable seat is threadedly sleeved on the outside of the screw rod; A drive motor is fixedly mounted on one side of one of the vertical plates, and an output shaft of the drive motor is fixedly mounted on one end of the screw rod.

7. The new energy vehicle short axis performance testing process according to claim 6, characterized in that: In step six, the electromagnetic heating mechanism further includes an electric push rod, a mounting rod is fixedly installed at the bottom of the electric push rod, a movable frame is fixedly installed on the output end of the electric push rod, the electromagnetic heating coil is inserted into the movable frame, a slide rail is slidably installed at the bottom of the movable frame, and the electromagnetic heating coil is arranged on the outside of the short shaft to be tested; The two ends of the connecting shaft are fixedly connected to the output end of the first servo motor and the input end of the torque sensor respectively, the inclined frame is slidably sleeved on the outside of the connecting shaft, the counterweight plate is slidably sleeved on the outside of the inclined frame, and a connecting tube is fixedly installed on one side of the inclined frame, and the connecting tube is rotatably installed in the test plate.

8. The new energy vehicle short axis performance testing process according to claim 7, characterized in that: In step 4, the control panel and the bottom of the high-speed camera are fixedly mounted on the same base, and the first guide rail, mounting rod, second guide rail, fixing plate, fixing seat and vertical plate are all fixedly mounted on the top of the base.

9. The new energy vehicle short axis performance testing process according to claim 8, characterized in that: In step six, the infrared temperature detector is fixedly mounted on the top of the base, and the infrared temperature detector is connected to the control panel signal.

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