New energy automobile short shaft performance test technology

Abstract

The invention discloses a new energy automobile short shaft performance test technology, and belongs to the technical field of automobile part detection, and the technology comprises the following steps: 1, sample clamping; step 2, paint spraying identification; step 3, constant torque test: the driving mechanism and the driven mechanism control the two clamps to have relatively constant torque and rotate synchronously; 4, comparing results; 5, dynamic torque testing; step 6, simulating a heating test; 7, starting a torque test; step 8, sudden stop torque testing; step 9, testing fatigue torque; and tenthly, static torque testing is carried out. The performance of the short shaft under actual working conditions can be comprehensively evaluated through different states and environments of the short shaft of the new energy automobile in the using process, such as temperature change and working load fluctuation, an integrated structure is adopted, the short shaft does not need to be turned over and repeatedly clamped in the detection process, and the detection efficiency is improved. And errors possibly caused by multiple times of clamping are avoided.

Description

Technical Field

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

[0002] In recent years, with the increasing pressure of environmental protection worldwide, new energy vehicles have become an important direction for the development of the automobile industry. New energy vehicles include pure electric vehicles (EV), plug-in hybrid vehicles (PHEV) and fuel cell vehicles (FCEV). Compared with traditional internal combustion engine vehicles, new energy vehicles have significant differences in power systems, driving methods and energy storage. These differences require that the key components of new energy vehicles, including short shafts (usually referring to drive shafts, transmission shafts, etc.), have higher performance standards to ensure that the vehicle's power transmission system is stable, efficient and reliable. The main role of short shafts in new energy vehicles is to transmit power, support loads and withstand high-speed rotation and other important functions. With the popularization of electric drive technology and the change of vehicle design, the power transmission system of new energy vehicles no longer relies solely on traditional internal combustion engines, but directly drives the vehicle's wheel axles through the motor drive system. Due to the characteristics of high speed, high torque and instant response, the electric drive system has higher requirements on the performance of short shafts. Therefore, as an important part of the power system, the performance of the short shaft directly affects the driving efficiency, comfort and safety of the whole vehicle.

[0003] The short axle of new energy vehicles is responsible for transmitting torque from the motor to the wheels in the electric drive system, 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 wide application in the market, the performance requirements of short axles are getting higher and higher, and their working environment and working conditions are becoming more complex. Due to the high speed and instantaneous high torque output of electric motors, short axles of electric vehicles often face more stringent working conditions than traditional vehicles during use. For example, the instantaneous high torque at motor startup, power transmission under high-speed and stable operation, thermal effects during long-term high-speed operation, and adaptability under different environmental conditions all pose huge challenges to the performance of short axles.

[0005] The failure of the short axle will not only cause the vehicle to be unable to drive normally, but may also cause serious safety hazards. In order to ensure that the power system of new energy vehicles can operate stably and reliably under various working environments, it is particularly important to conduct comprehensive and systematic short axle performance testing.

[0006] However, it is difficult for conventional testing methods to simulate the complex operating conditions of new energy vehicles. Traditional short-axis testing methods are usually carried out within a lower speed range, and cannot effectively simulate the working state of the motor at high speed and its impact on the short axis. Especially in electric drive systems, the torque changes more drastically, and instantaneous load changes may cause fatigue cracks or other forms of damage to the short axis. Traditional testing methods are difficult to reveal this risk; traditional short-axis testing is usually carried out under static loads, focusing on long-term durability and basic strength testing. However, the working environment of the short axis of new energy vehicles is far more complex than static conditions. Under dynamic conditions such as high-speed driving, intense acceleration, frequent braking, climbing or starting on steep slopes, the short axis needs to withstand rapidly changing loads. Conventional testing equipment and processes cannot effectively simulate the combined effects of these dynamic loads and complex environments on the short axis. Due to the high-efficiency output of the motor and the high-load operation of the short axis, the short axis may experience thermal effects in a long-term, high-temperature environment, resulting in changes in material properties and even thermal fatigue problems. Conventional testing methods mostly use standard ambient temperature conditions, which cannot simulate the heat accumulation effect caused by factors such as high motor speed, high load and insufficient heat dissipation during the actual driving of new energy vehicles. Thermal fatigue can cause cracks on the short shaft surface and reduce its strength, which in turn affects its service life and safety. The traditional testing method requires the use of multiple testing equipment for separate testing, which requires the short shaft to be circulated and repeatedly clamped between multiple testing equipment during the test, 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 driving mechanism controls the first movable platform to move horizontally, places the short shaft to be tested between the two fixtures, and then controls the first movable platform to reset, and controls the multiple clamping plates on the fixture to approach each other to clamp the two ends of the short shaft to be tested;

[0011] Step 2, spray paint marking: the electric push rod on the spray paint mechanism drives the spray paint head to move horizontally, and the spray paint head sprays paint on the short shaft to be tested, so that a horizontal strip spray paint mark is formed on the surface of the short shaft to be tested, and the short shaft to be tested is controlled to rotate by the driving mechanism and the driven mechanism, so as to form a circular horizontal strip spray paint mark with equal spacing on the outer surface of the short shaft to be tested, and the high-speed camera acquires the image of the short shaft to be tested and obtains a 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 acquires the image of the short shaft to be tested, obtains the 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, monitors the torque value of the short shaft to be tested through the torque sensor on the driving mechanism, and displays the comparison data and torque data on the control panel respectively;

[0014] Step 5: Dynamic torque test: The driving mechanism and the driven mechanism control the two fixtures to generate a changing torque and control the two fixtures to rotate synchronously, and repeat 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 a 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 the actual operation. The infrared temperature detector monitors the temperature of the short shaft to be tested, and repeats step 4 respectively to obtain multiple sets of repeated data;

[0016] Step 7: Start the torque test: the second cylinder on the driven mechanism controls the socket to be disengaged from the plug connector, the driving mechanism controls the fixture to accelerate rapidly 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 repeats step 4;

[0018] Step 9, fatigue torque test: the driving mechanism controls the fixture to rotate back and forth, 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, and the driving mechanism provides the torsional force of the fixture to generate torque on the short shaft to be tested, and repeat step 4.

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

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

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

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

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

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

[0026] A second mobile platform, wherein a second guide rail is slidably mounted on the bottom of the second mobile platform, a bracket and a second servo motor are fixedly mounted on the top of the second mobile 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 seat, a second cylinder is fixedly mounted on one side of the fixed seat, and an output end of the second cylinder is fixedly mounted on one side of the second moving 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 plug socket, and the latch pin is adapted to the plug connector, and a counterweight ring is fixedly sleeved on the outer side of the driven ring.

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

[0030] A mounting plate, a plurality of mounting plates being fixedly mounted on one side of the mounting plate, and a threaded column being 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 end of the linkage rods is hinged on the mounting plate;

[0032] A driving 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, the other side of which is fixedly mounted with a plurality of guide rods, and the driving ring is slidably sleeved on the outer side 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 in 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 clamp is provided in two groups, and two mounting plates are respectively fixedly mounted on the other end of the driven shaft and the other end of the driving shaft, and positioning plates are rotatably sleeved on the outer sides of the driving shaft and the driven shaft.

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

[0037] A paint spray head, wherein a movable seat is fixedly installed on the rear side of the paint spray head, a spray pump is fixedly installed 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 driving motor is fixedly mounted on one side of one of the vertical plates, and an output shaft of the driving motor is fixedly mounted on one end of a screw rod.

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

[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 moving frame is fixedly installed on the output end of the electric push rod, the electromagnetic heating coil is inserted into the moving frame, and a slide rail is slidably installed at the bottom of the moving frame.

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

[0044] A connecting shaft, a rotating frame is fixedly sleeved on the outer side of the connecting shaft, a plurality of counterweight plates are slidably mounted on the inner side of the rotating frame, and 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 tube is fixedly installed on one side of the oblique frame;

[0046] A test plate, wherein the connecting tube 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 an 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 test process of a new energy vehicle is described. In step 1, the two ends of the short-axle to be tested are clamped by a fixture, and the clamping stability is improved by the self-locking property of the threaded match between the threaded collar and the threaded column. The rotation of the threaded collar is locked by the provided connecting ring, positioning rod and connecting spring 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 short-axle performance test process of a new energy vehicle is described. In step 2, a horizontal stripe spray paint mark with equal spacing is formed on the outer surface of the short-axle to be tested by a spray paint mechanism, and a high-speed camera is used to obtain an image to facilitate intuitive observation and 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, in step three, simulates the performance of the short-axle under constant torque in a rotating state, and in step four, a high-speed camera is used in conjunction with a control panel and a torque sensor to achieve intuitive observation and analysis of the short-axle performance;

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

[0055] 5. In the present invention, in the short-axle performance test process of a new energy vehicle, in step 6, the electromagnetic heating mechanism is set to simulate the condition that the short-axle will heat up during actual use, and the infrared temperature detector monitors the temperature of the short-axle to be tested, so as to test the performance of the short-axle under different temperature conditions. The speed monitoring mechanism is set to automatically adjust the current in the electromagnetic heating mechanism according to the speed of the short-axle, heat the short-axle to a corresponding degree, simulate the real environment of the short-axle, and realize accurate performance detection;

[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, fluctuations in workload, etc., and is completed with an integrated structure. The short-axle does not need to be circulated and repeatedly clamped during the detection process, thus 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 cross-sectional structural schematic diagram 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 A schematic diagram of the side cross-sectional structure 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 by 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] Fig. 9 This is a three-dimensional structural schematic diagram of the paint spraying mechanism proposed by the present invention;

[0066] Fig.10 A schematic diagram of the three-dimensional structure of the electromagnetic heating mechanism proposed by the present invention;

[0067] Fig.11 It is a three-dimensional structural schematic diagram of the rotation speed monitoring mechanism proposed in the present invention.

[0068] In the figure: 1. base; 101. positioning plate; 2. fixture; 201. mounting plate; 202. mounting plate; 203. linkage rod; 204. arc connecting rod; 205. driving ring; 206. threaded column; 207. threaded collar; 208. connecting ring; 209. positioning rod; 210. connecting spring; 211. clamping plate; 3. painting mechanism; 301. vertical plate; 302. crossbeam; 303. moving seat; 304. painting head; 305. spraying pump; 306. screw rod; 307. driving motor; 4. driving mechanism; 401. first moving platform; 402. first cylinder; 403. fixing plate; 404. first guide rail; 405. first servo motor; 406. torque sensor; 407. driving 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 board; 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 described clearly and completely 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 - Fig.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 driving mechanism 4 controls the first movable table 401 to move horizontally, places the short shaft 10 to be tested between the two clamps 2, and then controls the first movable table 401 to reset, and controls the multiple clamping plates 211 on the clamps 2 to approach each other to clamp the two ends of the short shaft 10 to be tested;

[0072] Step 2, spray paint marking: the electric push rod 904 on the spray paint mechanism 3 drives the spray paint head 304 to move horizontally, and the spray paint head 304 sprays paint on the short shaft 10 to be tested, so that a horizontal strip spray paint mark is formed on the surface of the short shaft 10 to be tested, and 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 spray paint mark with equal spacing is formed on the outer surface of the short shaft 10 to be tested, and the high-speed camera 7 acquires 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 acquires the image of the short shaft 10 to be tested, obtains the test pattern, and transmits it to the control panel 8. The control panel 8 compares the test pattern with the standard pattern to obtain the torsional deformation value, monitors the torque value of the short shaft 10 to be tested through the torque sensor 406 on the driving mechanism 4, and displays the comparison data and torque data 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 changing 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 fixtures 2 to generate a variable torque and control the two fixtures 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. The infrared temperature detector 11 monitors the temperature of the short shaft 10 to be tested, and repeats step 4 respectively 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 accelerate rapidly and rotate at high speed under static conditions, and repeat step 4;

[0078] Step 8, emergency stop torque test: the driving mechanism 4 controls the fixture 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 moving platform 401, the bottom of which 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 moving 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 moving platform 501, a second guide rail 503 is slidably mounted on the bottom of the second moving platform 501, a bracket 505 and a second servo motor 504 are fixedly mounted on the top of the second moving 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 seat, a second cylinder 502 is fixedly mounted on one side of the fixed seat, and an output end of the second cylinder 502 is fixedly mounted on one side of the second moving 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 ring.

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

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

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

[0093] A driving ring 205, one side of which is hinged with a plurality of arc-shaped connecting rods 204, the other end of which is hinged on the corresponding linkage rod 203, and the other side of the mounting plate 201 is fixedly mounted with a plurality of guide rods, and the driving ring 205 is slidably sleeved on the outer side of the guide rods;

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

[0095] A connecting ring 208 is provided, on one side of which a plurality of positioning rods 209 and a plurality of connecting springs 210 are fixedly installed. The positioning rods 209 are movably inserted into the inside 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 driven to come 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 to rotate and move closer to the mounting plate by cooperating with the thread of the threaded column 206. The drive ring 205 moves to one side of the test plate 201 and drives the drive ring 205 to approach the mounting plate 201. The drive 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 released, 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 drive 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 two mounting plates 201 are respectively fixedly mounted on the other end of the driven shaft 509 and the other end of the driving shaft 407 , and 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 seat 303 is fixedly installed on the rear side of the paint spray head 304, a spray pump 305 is fixedly installed on the top of the movable seat 303, and a discharge port of the spray pump 305 is connected to the paint spray head 304;

[0099] Vertical plates 301, which are arranged 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 outer side of the crossbeam 302, a screw rod 306 is rotatably installed between the two groups of vertical plates 301, and the movable seat 303 is threadedly sleeved on the outer side of the screw rod 306;

[0100] The driving motor 307 is fixedly mounted on one side of one of the vertical plates 301, and the output shaft of the driving motor 307 is fixedly mounted on one end of the screw rod 306. The driving motor 307 drives the screw rod 306 to rotate, and the screw rod 306 drives the moving seat 303 and the spray head to move horizontally by cooperating with the thread of the moving 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] An electromagnetic heating coil 901, which is arranged on the outside of the short shaft 10 to be tested;

[0103] An electric push rod 904, a mounting rod 905 is fixedly installed at the bottom of the electric push rod 904, a movable frame 902 is fixedly installed on the output end of the electric push rod 904, the electromagnetic heating coil 901 is inserted into the movable frame 902, and a slide rail 903 is slidably installed at 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, a rotating frame 602 is fixedly sleeved on the outer side of the connecting shaft 601, a plurality of counterweight plates 603 are slidably mounted on the inner side of the rotating frame 602, and 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, the counterweight plate 603 is slidably sleeved on the outside of the oblique frame 604, and a connecting tube 605 is fixedly installed on one side of the oblique frame 604;

[0107] A test plate 606, in which the connecting tube 605 is rotatably mounted;

[0108] Baffle 608, a varistor 607 is fixedly installed between the baffle 608 and the test plate 606. When the connecting shaft 601 accelerates its rotation, it will drive the clamp to accelerate its rotation, 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 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 through the different states and environments of the short axle of the new energy vehicle during use, such as temperature changes, fluctuations in workload, etc., and an integrated structure is adopted. The short axle does not need to be circulated and repeatedly clamped during the detection process, thus 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, several improvements and modifications can be made to the present invention, 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 test process, characterized in that: The following steps are involved: Step 1: sample clamping: the first cylinder (402) on the driving mechanism (4) controls the first movable platform (401) to move horizontally, places the short shaft (10) to be tested between the two clamps (2), then controls the first movable platform (401) to reset, and controls the multiple clamping plates (211) on the clamps (2) to approach each other to clamp the two ends of the short shaft (10) to be tested; Step 2, spraying paint marks: the electric push rod (904) on the spraying paint mechanism (3) drives the spraying paint head (304) to move horizontally, and the spraying paint head (304) sprays paint on the short shaft (10) to be tested, so that a horizontal strip spraying paint mark is formed on the surface of the short shaft (10) to be tested, and 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 spraying paint mark with equal spacing is formed on the outer surface of the short shaft (10) to be tested, and the high-speed camera (7) acquires the image of the short shaft (10) to be tested and obtains a standard pattern; 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 to rotate synchronously; Step 4: Result comparison: The high-speed camera (7) acquires 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, monitors the torque value of the short shaft (10) to be tested through the torque sensor (406) on the driving mechanism (4), and displays the comparison data and torque data on the control panel (8) respectively; Step 5: Dynamic torque test: the driving mechanism (4) and the driven mechanism (5) control the two fixtures (2) to generate a changing torque and control the two fixtures (2) to rotate synchronously, and repeat step 4; 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, the infrared temperature detector (11) monitors the temperature of the short shaft (10) to be tested, and repeats step 4 respectively to obtain multiple sets of repeated data; Step 7, starting 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 accelerate rapidly and rotate at high speed under static conditions, and repeat step 4; Step 8: Emergency stop torque test: the driving mechanism (4) controls the fixture (2) to stop instantly, and repeats step 4; Step 9, fatigue torque test: the driving mechanism (4) controls the fixture (2) to reciprocate, and repeats step 4 to obtain multiple sets of data; Step 10, static torque test: the second cylinder (502) on the driven mechanism (5) controls the plug (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.

2. The short-axle performance testing process for new energy vehicles according to claim 1 is characterized in that: In the step 1, the driving mechanism (4) comprises: A first movable platform (401), wherein the bottom of the first movable platform (401) is slidably connected to a first guide rail (404); A fixed plate (403), a first cylinder (402) being fixedly mounted on one side of the fixed plate (403), and an output end of the first cylinder (402) being fixedly mounted on one side of the first moving platform (401); A torque sensor (406), wherein a drive shaft (407) is fixedly connected to an output end of the torque sensor (406); A first servo motor (405), wherein the first servo motor (405) and a torque sensor (406) are both fixedly mounted on the top of the first moving platform (401).

3. The short-axle performance testing process for new energy vehicles according to claim 2 is characterized in that: In the step 3, the driven mechanism (5) comprises: A second movable platform (501), wherein a second guide rail (503) is 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); A fixed seat, a second cylinder (502) is fixedly mounted on one side of the fixed seat, and an output end of the second cylinder (502) is fixedly mounted on one side of the second moving platform (501); A driven shaft (509), one end of which is fixedly mounted with a plug connector (507), the plug connector (507) being movably plugged into a plug socket (506), and a latch (508) being adapted to the plug connector (507), and a counterweight ring (510) being fixedly sleeved on the outer side of the driven ring.

4. The short-axle performance testing process for new energy vehicles according to claim 3 is characterized in that: In the step 1, the clamp (2) comprises: A mounting plate (201), wherein a plurality of mounting plates (202) are fixedly mounted on one side of the mounting plate (201), and a threaded column (206) is fixedly mounted on the other side of the mounting plate (201); A clamping plate (211), wherein the clamping plates (211) are arranged in a plurality of groups, and a linkage rod (203) is hingedly connected to one side of the plurality of groups of clamping plates (211) that are away from each other, and the other end of the linkage rod (203) is hingedly connected to the mounting plate (202); A driving ring (205), wherein one side of the driving ring (205) is hinged with a plurality of arc-shaped connecting rods (204), the other end of the arc-shaped connecting rod (204) is hinged on a corresponding linkage rod (203), and the other side of the mounting plate (201) is fixedly mounted with a plurality of guide rods, and the driving ring (205) is slidably sleeved on the outer sides of the guide rods; A threaded collar (207), wherein 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); A connecting ring (208), one side of which is fixedly mounted with a plurality of positioning rods (209) and a plurality of connecting springs (210), the positioning rods (209) being movably inserted into the interior of the threaded collar (207) and the driving ring (205), and the other end of the connecting spring (210) being fixedly connected to the threaded collar (207).

5. The short-axle performance testing process for new energy vehicles according to claim 4 is characterized in that: The clamp (2) is provided in two groups, and the two mounting plates (201) are respectively fixedly mounted on the other end of the driven shaft (509) and the other end of the driving shaft (407), and the outer sides of the driving shaft (407) and the driven shaft (509) are both rotatably sleeved with positioning plates (101).

6. The short-axle performance testing process for new energy vehicles according to claim 5 is characterized in that: In the step 2, the paint spraying mechanism (3) comprises: A paint spray head (304), wherein a movable seat (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 seat (303), and a discharge port of the spray pump (305) is connected to the paint spray head (304); A vertical plate (301), wherein the vertical plates (301) are arranged in two groups, a crossbeam (302) is fixedly installed between the two groups of vertical plates (301), the movable seat (303) is slidably sleeved on the outer side of the crossbeam (302), a screw rod (306) is rotatably installed between the two groups of vertical plates (301), and the movable seat (303) is threadedly sleeved on the outer side of the screw rod (306); A driving motor (307) is fixedly mounted on one side of one of the vertical plates (301), and an output shaft of the driving motor (307) is fixedly mounted on one end of the screw rod (306).

7. The short-axle performance testing process for new energy vehicles according to claim 6 is characterized in that: In step six, the electromagnetic heating mechanism (9) comprises: An electromagnetic heating coil (901), wherein the electromagnetic heating coil (901) is arranged outside the short shaft (10) to be tested; An electric push rod (904), a mounting rod (905) is 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 inserted into the movable frame (902), and a slide rail (903) is slidably mounted on the bottom of the movable frame (902).

8. The short-axle performance testing process for new energy vehicles according to claim 7 is characterized in that: In step six, the rotation speed monitoring mechanism (6) comprises: A connecting shaft (601), the outer side of the connecting shaft (601) is fixedly sleeved with a rotating frame (602), the inner side of the rotating frame (602) is slidably mounted with a plurality of counterweight plates (603), and the two ends of the connecting shaft (601) are respectively fixedly connected to the output end of the first servo motor (405) and the input end of the torque sensor (406); An inclined frame (604), wherein the inclined frame (604) is slidably sleeved on the outside of the connecting shaft (601), the counterweight plate (603) is slidably sleeved on the outside of the inclined frame (604), and a connecting tube (605) is fixedly installed on one side of the inclined frame (604); A test plate (606), wherein the connecting tube (605) is rotatably mounted in the test plate (606); A baffle (608), a varistor (607) is fixedly installed between the baffle (608) and the test board (606), and the varistor (607) is connected in series with the electromagnetic heating coil (901) and is connected to the alternating circuit.

9. The short-axle performance testing process for new energy vehicles according to claim 8 is characterized in that: In step 4, the control panel (8) and the bottom of the high-speed camera (7) are fixedly mounted on 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).

10. The new energy vehicle short-axle performance testing process according to claim 9, characterized in that: In step six, the infrared temperature detector (11) is fixedly mounted on the top of the base (1), and the infrared temperature detector (11) is connected to the control panel (8) by signal.

Images