Testing system of brushless direct current motor

Abstract

The invention discloses a test system of a brushless direct current motor, and relates to the technical field of brushless motor test.The test system comprises a supporting table and a power-assisted steering assembly, the power-assisted steering assembly comprises a steering column, and the top of the supporting table is movably sleeved with the steering column. The power-assisted steering assembly is limited and fixed to the top of the first limiting sleeve, the vibration motor is started at the moment, the vibration motor drives the brushless motor to rapidly vibrate, the vibration simulation effect when the brushless motor works is achieved, and therefore the laser transmitter can test the deviation position of the worm. The auxiliary assembly can simulate multiple working conditions of the brushless driving motor, so that the testing effects of the brushless motor under different working conditions are achieved, namely multiple testing effects after the brushless motor is assembled are achieved, and the problem that the stability and the service life of a power-assisted system are greatly influenced due to large deviation of a power-assisted assembly position is avoided.

Description

Technical Field

[0001] This invention relates to the field of motor assembly and testing, specifically to a testing system for a brushless DC motor. Background Technology With the rapid development of industrial automation, intelligent manufacturing, and the new energy industry, increasingly higher demands are being placed on the performance, efficiency, and reliability of motors. Among the many types of motors, brushless DC motors, with their high efficiency, high power density, long lifespan, low noise, and excellent dynamic response performance, have been widely used in aerospace, robotics, new energy vehicles, drones, home appliances, industrial servo control, and precision instruments, gradually replacing traditional brushed DC motors and some AC asynchronous motors, becoming the core power component in the modern motion control field. The working principle of the motor determines its superior performance, but it also brings new challenges to its design, manufacturing, and quality control. Unlike brushed motors, brushless motors use electronic commutation instead of mechanical brush commutation. Its core control system usually consists of three parts: the motor body, position sensors, and drive controllers. This complex mechatronic characteristic means that the performance of brushless motors depends not only on the electromagnetic design of the motor body, but also on its drive control strategy, load characteristics, and working environment.

[0002] In the production and processing of brushless motors, manual testing is often required. This testing typically involves manually connecting testing instruments, such as power analyzers and dynamometers, to perform simple checks on the rated power and speed of the brushless motor. However, because the actual operating state of a brushless motor is easily affected by various external factors, such as significant changes in operating temperature and torque, and the motor's installation structure, simple manual testing cannot effectively and fully represent the motor's actual operating state. This, in turn, greatly impacts the production quality of the brushless motor. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a test system for brushless DC motors.

[0004] To solve the above-mentioned technical problems, the present invention provides a testing system for a brushless DC motor, comprising a support platform and a steering assist assembly. The steering assist assembly includes a steering column, which is movably sleeved on the top of the support platform. A bearing sleeve is fixedly sleeved on the outside of the steering column. A mounting bracket is fixedly connected to the outside of the bearing sleeve. A motor under test is fixedly mounted on the outside of the mounting bracket. A worm gear is fixedly connected to the output shaft of the motor under test. A sun gear is fixedly sleeved on the outside of the steering column. A gear ring is movably sleeved on the outside of the sun gear. Planet gears are movably sleeved inside the gear ring. A planet carrier is movably sleeved at the bottom of the planet gears. A limit seat is fixedly sleeved on the top of the support platform. A vibration table is movably sleeved on the top of the limit seat. A first limit sleeve is fixedly connected to the top of the vibration table. A second limit sleeve is fixedly connected to the top of the first limit sleeve. A testing host is fixedly connected to one side of the top of the support platform. A testing component is provided on the other side of the top of the support platform. The testing component includes: An electric slide rail is fixedly installed on one side of the top of the support platform. A sliding sleeve is movably fitted onto the top of the slide rail. A third limiting sleeve is fixedly connected to the top of the sliding sleeve. A lifting block is movably fitted inside the third limiting sleeve. A first drive motor is mounted on the top of the third limiting sleeve. A threaded post is fixedly connected to the output shaft of the first drive motor. The threaded post is threadedly fitted inside the lifting block. A laser emitter is fixedly installed on one side of the top of the lifting block. Preferably, the electric slide rail and the threaded column are perpendicular to each other, and there are two electric slide rails, which are symmetrically distributed about the threaded column as the axis of symmetry.

[0005] Preferably, the limiting seat is provided with a vibration component, which includes a vibration motor. The vibration motor is fixedly installed at the bottom of the vibration table. A support spring is fixedly connected to the bottom of the inner cavity of the limiting seat. A shock-absorbing sleeve is fixedly fitted inside the limiting seat.

[0006] Preferably, the shock-absorbing sleeve is made of rubber and is movably fitted onto the outside of the vibration table.

[0007] Preferably, the second limiting sleeve is provided with a limiting component inside. The limiting component includes a second motor, which is fixedly installed outside the first limiting sleeve. A first toothed pulley is fixedly sleeved on the output shaft of the second motor. A sliding block is movably sleeved inside the second limiting sleeve. The sliding block is movably sleeved outside the steering column. A bidirectional threaded rod is threaded inside the sliding block. A second toothed pulley is fixedly sleeved at one end of the bidirectional threaded rod. The second toothed pulley is connected to the first toothed pulley via a toothed belt drive.

[0008] Preferably, the sliding block has a sliding component inside, the sliding component includes a receiving groove, the receiving groove is opened on one side of the sliding block, and a clamping wheel is movably sleeved inside the receiving groove.

[0009] Preferably, the top of the second limiting sleeve is provided with an auxiliary component, the auxiliary component including a first cylinder, the first cylinder is fixedly installed on the top of the second limiting sleeve, a pressure sensor is fixedly installed at one end of the first cylinder, a clamping sleeve is fixedly connected to the side of the pressure sensor, and a friction plate is fixedly sleeved on one side of the clamping sleeve.

[0010] Preferably, the top of the second limiting sleeve is provided with a fixing component, the fixing component including a second cylinder, the second cylinder is fixedly installed on one side of the top of the second limiting sleeve, the bottom of the second cylinder is fixedly connected to a clamping seat, the top of the clamping seat is fixedly connected to a limiting post, and the limiting post is movably sleeved on one side of the top of the second limiting sleeve.

[0011] Preferably, a temperature monitoring component is provided on the side of the first limiting sleeve. The temperature monitoring component includes a fixing base, which is fixedly connected to the side of the first limiting sleeve. A temperature sensor is fixedly sleeved on the top of the fixing base, and the top of the temperature sensor is in close contact with the bottom of the motor under test.

[0012] The beneficial effects of this invention are as follows: (1) A test system for a brushless DC motor is provided by setting up a test component, a vibration component and an auxiliary component. When the brushless motor is assembled, the steering assist component is fixed at the top of the first limit sleeve. At this time, the vibration motor is started, so that the vibration motor can drive the brushless motor to vibrate rapidly, which achieves the simulation effect of vibration when the brushless motor is working. This allows the laser emitter to test the worm gear deviation position, and the auxiliary component to simulate the torque of the drive motor under various working conditions, thus achieving the test effect of the brushless motor under different working conditions. This achieves various test effects after the brushless motor is assembled, thus avoiding the problem that the stability and life of the assist system are greatly affected by the large deviation of the assist assembly position. (2) By setting auxiliary components, when the brushless motor is installed and tested, the two No. 1 cylinders are started, so that the No. 1 cylinders can drive the two clamping sleeves to squeeze and clamp the outside of the steering column, that is, drive the two friction plates to squeeze and clamp the outside of the steering column, thereby achieving the damping effect when the steering column rotates, that is, achieving the driving force adjustment effect of the brushless motor, and thus achieving the simulation effect of various working conditions of the brushless drive motor, thereby bringing convenience to the driving force test of the brushless motor under different conditions. (3) By setting up a temperature monitoring component, when the motor under test is working for a long time, the temperature sensor can monitor the working temperature of the motor under test in real time, and then display it in real time through the test host, thereby achieving the monitoring effect of working temperature during the installation test of the brushless motor, that is, achieving the stability test effect of the brushless motor under long-term high load, thus improving the functionality of the brushless motor installation test. Attached Figure Description

[0013] Figure 1 A schematic diagram of a preferred embodiment of a test system for a brushless DC motor provided by the present invention; Figure 2 This is a side view of a test system for a brushless DC motor according to the present invention. Figure 3 This is a bottom view of the support platform in the test system for a brushless DC motor according to the present invention. Figure 4 This is a front view of an auxiliary component in a test system for a brushless DC motor according to the present invention. Figure 5 This is a front view of the steering assist component in a test system for a brushless DC motor according to the present invention. Figure 6 This is a front view of a limit component in a test system for a brushless DC motor according to the present invention. Figure 7 This is a front view of the limit seat in a test system for a brushless DC motor according to the present invention. Figure 8 This is a front view of a fixed component in a test system for a brushless DC motor according to the present invention. Figure 9 This is a cross-sectional view of the No. 3 limit sleeve in the test system of a brushless DC motor according to the present invention.

[0014] The names of the components marked in the above attached diagrams are as follows: 1. Support platform; 2. Power steering assembly; 21. Steering column; 22. Bearing sleeve; 23. Mounting bracket; 24. Motor under test; 25. Worm gear; 26. Sun gear; 27. Gear ring; 28. Planetary gears; 29. ​​Planetary carrier; 3. Limiting seat; 4. Vibration table; 5. Limiting sleeve No. 1; 6. Limiting sleeve No. 2; 7. Test host; 8. Test assembly; 81. Electric slide rail; 82. Sliding sleeve; 83. Limiting sleeve No. 3; 84. Lifting block; 85. Drive motor No. 1; 86. Threaded column; 87. Laser emitter; 9. Vibration assembly; 91. Vibration motor; 92. Support spring; 10. Shock absorber sleeve; 11. Limiting assembly; 111. Motor No. 2; 112. Toothed pulley No. 1; 113. Sliding block; 114. Bidirectional threaded rod; 115. Toothed pulley No. 2; 12. Sliding assembly; 121. Receiving groove; 122. Clamping wheel; 13. Auxiliary assembly; 131. Cylinder No. 1; 132. Pressure sensor; 133. Clamping sleeve; 134. Friction plate; 14. Fixing assembly; 141. Cylinder No. 2; 142. Clamping seat; 143. Limiting post; 15. Temperature monitoring assembly; 151. Fixing seat; 152. Temperature sensor. Detailed Implementation

[0015] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0016] like Figure 1-5 and Figure 8-9As shown, the present invention provides a test system for a brushless DC motor, including a support platform 1 and a steering assist assembly 2. The steering assist assembly 2 includes a steering column 21, which is movably sleeved on the top of the support platform 1. A bearing sleeve 22 is fixedly sleeved on the outside of the steering column 21. A mounting bracket 23 is fixedly connected to the outside of the bearing sleeve 22. A motor under test 24 is fixedly mounted on the outside of the mounting bracket 23. A worm gear 25 is fixedly connected to the output shaft of the motor under test 24. A sun gear 26 is fixedly sleeved on the outside of the steering column 21. The outside of the sun gear 26 is movably sleeved... A gear ring 27 is connected, and a planetary gear 28 is movably sleeved inside the gear ring 27. A planetary carrier 29 is movably sleeved at the bottom of the planetary gear 28. A limit seat 3 is fixedly sleeved on the top of the support platform 1. A vibration table 4 is movably sleeved on the top of the limit seat 3. A first limit sleeve 5 is fixedly connected to the top of the vibration table 4. A second limit sleeve 6 is fixedly connected to the top of the first limit sleeve 5. A test host 7 is fixedly connected to one side of the top of the support platform 1. A test assembly 8 is provided on the other side of the top of the support platform 1. The test assembly 8 includes an electric slide rail 81, which is fixedly installed. On one side of the top of the support platform 1, a sliding sleeve 82 is movably sleeved on the top of the electric slide rail 81. A third limiting sleeve 83 is fixedly connected to the top of the sliding sleeve 82. A lifting block 84 is movably sleeved inside the third limiting sleeve 83. A first drive motor 85 is installed on the top of the third limiting sleeve 83. A threaded column 86 is fixedly connected to the output shaft of the first drive motor 85. The threaded column 86 is threadedly sleeved inside the lifting block 84. A laser emitter 87 is fixedly installed on one side of the top of the lifting block 84. By setting the test component 8, when the brushless motor assembly is finished, the power steering component 2 is confined to the top of the vibration table 4. At this time, the laser emitter 87 is activated, so that the laser emitter 87 can emit laser rays to one end of the worm 25, thereby achieving the marking effect of the worm 25 position. This allows the position of the worm 25 to be measured by laser rays after various tests of the power steering component 2 are completed, thus achieving the effect of measuring the deviation position of the worm 25, that is, achieving the effect of testing the deviation distance of the brushless motor. This avoids the problem of a large deviation in the power steering assembly position leading to a significant reduction in the service life of the power steering system.

[0017] like Figure 1-2 and Figure 9As shown, the electric slide rail 81 and the threaded column 86 are perpendicular to each other, and there are two electric slide rails 81, which are symmetrically distributed about the threaded column 86 as the axis of symmetry. By setting the electric slide rail 81 and the threaded column 86, when the position of the laser emitter 87 needs to be adjusted, the electric slide rail 81 and the first drive motor 85 are started, so that the electric slide rail 81 can drive the laser emitter 87 to move back and forth through the third limit sleeve 83, that is, drive the laser beam to move back and forth. At this time, the first drive motor 85 can drive the lifting block 84 to move up and down through the threaded column 86, that is, drive the laser beam to move up and down through the laser emitter 87, thereby achieving the effect of adjusting the laser beam up and down, and thus achieving the effect of adjusting the position of the laser beam mark.

[0018] like Figure 3 and Figure 7 As shown, a vibration component 9 is provided inside the limiting seat 3. The vibration component 9 includes a vibration motor 91, which is fixedly installed at the bottom of the vibration table 4. A support spring 92 is fixedly connected to the bottom of the inner cavity of the limiting seat 3, and a shock-absorbing sleeve 10 is fixedly sleeved inside the limiting seat 3. By setting the vibration component 9, when the position of the steering assist component 2 is fixed, the vibration motor 91 is started, so that the vibration motor 91 can drive the first limiting sleeve 5 and the second limiting sleeve 6 to vibrate rapidly through the vibration table 4, thereby achieving the vibration effect of the motor under test 24, that is, achieving the simulation effect of the vibration when the brushless motor is working, and thus improving the accuracy of the position offset test when the brushless motor is working for a long time.

[0019] like Figure 7 As shown, the shock-absorbing sleeve 10 is made of rubber and is movably fitted onto the outside of the vibration table 4. By setting the shock-absorbing sleeve 10, when the brushless motor driven by the vibration table 4 vibrates rapidly, the shock-absorbing sleeve 10 can limit the shaking vibration table 4, thereby avoiding the problem of the vibration table 4 colliding with the inner wall of the limit seat 3 when vibrating rapidly, thus achieving the protective effect of the vibration table 4.

[0020] like Figure 6 and Figure 8As shown, the second limiting sleeve 6 has a limiting component 11 inside. The limiting component 11 includes a second motor 111, which is fixedly installed outside the first limiting sleeve 5. A first toothed pulley 112 is fixedly sleeved on the output shaft of the second motor 111. A sliding block 113 is movably sleeved inside the second limiting sleeve 6. The sliding block 113 is movably sleeved outside the steering column 21. A double-threaded rod 114 is threaded inside the sliding block 113. A second toothed pulley 115 is fixedly sleeved at one end of the double-threaded rod 114. The second toothed pulley 115 and the first toothed pulley... 112 is connected via a toothed belt drive; by setting a limiting component 11, when the steering assist component 2 needs to be limited and fixed, the steering column 21 is sleeved inside the first limiting sleeve 5 and the second motor 111 is started, so that the second motor 111 can drive the bidirectional threaded rod 114 to rotate through the first toothed pulley 112 and the second toothed pulley 115, causing the bidirectional threaded rod 114 to drive the two sets of sliding blocks 113 to clamp the outside of the steering column 21 at the same time, thereby achieving the clamping and limiting effect of the steering column 21, thus bringing convenience to the limiting and fixing of the steering assist component 2.

[0021] like Figure 6 As shown, a sliding component 12 is provided inside the sliding block 113. The sliding component 12 includes a receiving groove 121, which is opened on one side of the sliding block 113. A clamping wheel 122 is movably sleeved inside the receiving groove 121. By setting the sliding component 12, when the brushless motor is assembled and tested, the two sets of clamping wheels 122 can limit the rapidly rotating steering column 21, thereby avoiding the problem of friction between the steering column 21 and the sliding block 113 during the drive test. This avoids the problem of wear on the sliding block 113 during the rotation test of the steering column 21, thereby improving the smoothness of the rotation test of the steering column 21.

[0022] like Figure 1-2 and Figure 4 As shown, an auxiliary component 13 is provided on the top of the second limiting sleeve 6. The auxiliary component 13 includes a first cylinder 131, which is fixedly installed on the top of the second limiting sleeve 6. A pressure sensor 132 is fixedly installed on one end of the first cylinder 131. A clamping sleeve 133 is fixedly connected to the side of the pressure sensor 132. A friction plate 134 is fixedly sleeved on one side of the clamping sleeve 133. By setting the auxiliary component 13, when the brushless motor assembly test is performed, the two first cylinders 131 are activated, so that the first cylinders 131 can drive the two clamping sleeves 133 to squeeze and clamp the outside of the steering column 21, that is, drive the two friction plates 134 to squeeze and clamp the outside of the steering column 21, thereby achieving the damping effect when the steering column 21 rotates, that is, achieving the effect of adjusting the driving force of the brushless motor, and thus achieving the simulation effect of various working conditions of the brushless drive motor, thereby bringing convenience to the driving force test of the brushless motor under different conditions.

[0023] like Figure 8 As shown, a fixing component 14 is provided on the top of the second limiting sleeve 6. The fixing component 14 includes a second cylinder 141, which is fixedly installed on one side of the top of the second limiting sleeve 6. A clamping seat 142 is fixedly connected to the bottom of the second cylinder 141, and a limiting post 143 is fixedly connected to the top of the clamping seat 142. The limiting post 143 is movably sleeved on one side of the top of the second limiting sleeve 6. By setting the fixing component 14, when the power steering component 2 needs to be tested, the steering column 21 is sleeved on the top of the first limiting sleeve 5. At this time, the second cylinder 141 is activated, so that the second cylinder 141 can drive the clamping seat 142 to move up and down. That is, the clamping seat 142 drives the motor under test 24 to squeeze and clamp on the top of the first limiting sleeve 5, thereby achieving the clamping and fixing effect of the motor under test 24.

[0024] like Figure 8 As shown, a temperature monitoring component 15 is provided on the side of the first limiting sleeve 5. The temperature monitoring component 15 includes a fixing base 151, which is fixedly connected to the side of the first limiting sleeve 5. A temperature sensor 152 is fixedly sleeved on the top of the fixing base 151, and the top of the temperature sensor 152 is in close contact with the bottom of the motor under test 24. By setting the temperature monitoring component 15, when the motor under test 24 is subjected to long-term working test, the temperature sensor 152 can monitor the working temperature of the motor under test 24 in real time, and then display it in real time through the test host 7. This achieves the monitoring effect of working temperature during brushless motor assembly test, that is, achieves the stability test effect of brushless motor under long-term high load, and improves the functionality of brushless motor assembly test.

[0025] The working principle of this invention is as follows: When the brushless motor assembly is completed, the power steering assembly 2 is positioned on the top of the vibration table 4. At this time, the laser emitter 87 is activated, allowing it to emit laser rays towards one end of the worm gear 25, thereby marking the position of the worm gear 25. This enables the laser rays to measure the position of the worm gear 25 after various tests of the power steering assembly 2 are completed, achieving the effect of measuring the deviation position of the worm gear 25, i.e., testing the deviation distance of the brushless motor. This avoids the problem of a large deviation in the power steering assembly position leading to a significant reduction in the service life of the power steering system. When the position marked by the laser emitter 87 needs to be adjusted, the electric slide rail 81 and the first drive motor 85 are activated, allowing the electric slide rail 81 to... The laser emitter 87 is driven to reciprocate by the third limiting sleeve 83, which in turn drives the laser beam to reciprocate. At this time, the first drive motor 85 drives the lifting block 84 up and down via the threaded post 86, which in turn drives the laser beam up and down via the laser emitter 87. This achieves the effect of adjusting the laser beam's position, and consequently, adjusting the laser beam's marking position. When the steering assist component 2 is fixed, the vibration motor 91 is activated, causing the first limiting sleeve 5 and the second limiting sleeve 6 to vibrate rapidly via the vibration table 4. This achieves the vibration effect of the motor under test 24, simulating the vibration of a brushless motor during operation. This improves the accuracy of position offset testing during long-term operation of the brushless motor. When the brushless motor vibrates rapidly, the shock-absorbing sleeve 10 limits the shaking vibration table 4, preventing it from colliding with the inner wall of the limiting seat 3 during rapid vibration, thus achieving the protective effect of the vibration table 4. When the steering assist component 2 needs to be limited and fixed, the steering column 21 is fitted inside the first limiting sleeve 5 and the second motor 111 is started. The second motor 111 drives the bidirectional threaded rod 114 to rotate through the first toothed pulley 112 and the second toothed pulley 115. This causes the bidirectional threaded rod 114 to drive the two sets of sliding blocks 113 to clamp the steering column 21 simultaneously, thus achieving the clamping and limiting effect of the steering column 21, which facilitates the limiting and fixing of the steering assist component 2. When the brushless motor is assembled and tested... During testing, the two sets of clamping wheels 122 limit the rapid rotation of the steering column 21, preventing friction between the steering column 21 and the sliding block 113 during the drive test. This avoids wear on the sliding block 113 during the steering column 21 rotation test, thus improving the smoothness of the steering column 21 rotation test. When performing brushless motor assembly testing, the two cylinders 131 are activated, causing the two clamping sleeves 133 to press and clamp the steering column 21 externally, which in turn causes the two friction plates 134 to press and clamp the steering column 21 externally. This achieves a damping effect during the rotation of the steering column 21, thus achieving the effect of adjusting the drive force of the brushless motor, and simulating various working conditions of the brushless drive motor.This facilitates the testing of the driving force of the brushless motor under different conditions. When testing the power steering assembly 2, the steering column 21 is fitted onto the top of the first limiting sleeve 5. At this time, the second cylinder 141 is activated, causing the clamping seat 142 to move up and down. This clamping seat 142 then compresses and holds the motor 24 under test onto the top of the first limiting sleeve 5, achieving a secure clamping effect. During long-term operation testing of the motor 24, the temperature sensor 152 monitors the operating temperature of the motor 24 in real time, which is then displayed in real time by the testing host 7. This achieves the effect of monitoring the operating temperature during brushless motor assembly testing, thus achieving the stability testing effect of the brushless motor under long-term high load, and improving the functionality of brushless motor assembly testing.

[0026] It should be noted that the present invention is not limited to the specific structure shown in the accompanying drawings in the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art.

Claims

1. A test system for a brushless DC motor, characterized by, The system includes a support platform (1) and a power steering assembly (2). The power steering assembly (2) includes a steering column (21), which is movably fitted onto the top of the support platform (1). A bearing sleeve (22) is fixedly fitted onto the outside of the steering column (21). A mounting bracket (23) is fixedly connected to the outside of the bearing sleeve (22). A motor under test (24) is fixedly mounted on the outside of the mounting bracket (23). A worm gear (25) is fixedly connected to the output shaft of the motor under test (24). A sun gear (26) is fixedly fitted onto the outside of the steering column (21). A gear ring (25) is movably fitted onto the outside of the sun gear (26). 7) The planetary gear (28) is movably sleeved inside the gear ring (27), and the planetary carrier (29) is movably sleeved at the bottom of the planetary gear (28). The top of the support platform (1) is fixedly sleeved with a limiting seat (3), and the top of the limiting seat (3) is movably sleeved with a vibration table (4). The top of the vibration table (4) is fixedly connected with a first limiting sleeve (5), and the top of the first limiting sleeve (5) is fixedly connected with a second limiting sleeve (6). The test host (7) is fixedly connected to one side of the top of the support platform (1), and the test assembly (8) is provided on the other side of the top of the support platform (1). The test assembly (8) includes: An electric slide rail (81) is fixedly installed on one side of the top of the support platform (1). A sliding sleeve (82) is movably sleeved on the top of the electric slide rail (81). A third limiting sleeve (83) is fixedly connected to the top of the sliding sleeve (82). A lifting block (84) is movably sleeved inside the third limiting sleeve (83). A first drive motor (85) is installed on the top of the third limiting sleeve (83). A threaded column (86) is fixedly connected to the output shaft of the first drive motor (85). The threaded column (86) is threadedly sleeved inside the lifting block (84). A laser emitter (87) is fixedly installed on one side of the top of the lifting block (84).

2. The test system of a brushless DC motor according to claim 1, characterized in that: The electric slide rail (81) and the threaded column (86) are perpendicular to each other, and there are two electric slide rails (81), which are symmetrically distributed about the threaded column (86) as the axis of symmetry.

3. The test system of a brushless DC motor according to claim 1, characterized in that: The limiting seat (3) is provided with a vibration component (9), which includes a vibration motor (91). The vibration motor (91) is fixedly installed at the bottom of the vibration table (4). A support spring (92) is fixedly connected to the bottom of the inner cavity of the limiting seat (3). A shock-absorbing sleeve (10) is fixedly sleeved inside the limiting seat (3).

4. The test system of a brushless DC motor according to claim 3, characterized in that: The shock-absorbing sleeve (10) is made of rubber and is movably fitted onto the outside of the vibration table (4).

5. The test system of a brushless DC motor according to claim 1, characterized in that: The second limiting sleeve (6) is provided with a limiting component (11) inside. The limiting component (11) includes a second motor (111). The second motor (111) is fixedly installed outside the first limiting sleeve (5). A first toothed pulley (112) is fixedly sleeved on the output shaft of the second motor (111). A sliding block (113) is movably sleeved inside the second limiting sleeve (6). The sliding block (113) is movably sleeved outside the steering column (21). A double-threaded rod (114) is threaded inside the sliding block (113). A second toothed pulley (115) is fixedly sleeved at one end of the double-threaded rod (114). The second toothed pulley (115) and the first toothed pulley (112) are connected by a toothed belt drive.

6. The test system of a brushless DC motor according to claim 5, characterized in that: The sliding block (113) is provided with a sliding component (12) inside. The sliding component (12) includes a receiving groove (121). The receiving groove (121) is opened on one side of the sliding block (113). A clamping wheel (122) is movably sleeved inside the receiving groove (121).

7. The test system of a brushless DC motor of claim 1, wherein: The top of the second limiting sleeve (6) is provided with an auxiliary component (13). The auxiliary component (13) includes a first cylinder (131). The first cylinder (131) is fixedly installed on the top of the second limiting sleeve (6). A pressure sensor (132) is fixedly installed at one end of the first cylinder (131). A clamping sleeve (133) is fixedly connected to the side of the pressure sensor (132). A friction plate (134) is fixedly sleeved on one side of the clamping sleeve (133).

8. The test system of a brushless DC motor of claim 1, wherein: The top of the second limiting sleeve (6) is provided with a fixing component (14), the fixing component (14) includes a second cylinder (141), the second cylinder (141) is fixedly installed on one side of the top of the second limiting sleeve (6), the bottom of the second cylinder (141) is fixedly connected to a clamping seat (142), the top of the clamping seat (142) is fixedly connected to a limiting post (143), and the limiting post (143) is movably sleeved on one side of the top of the second limiting sleeve (6).

9. The test system of a brushless DC motor of claim 1, wherein: A temperature monitoring component (15) is provided on the side of the first limiting sleeve (5). The temperature monitoring component (15) includes a fixing seat (151). The fixing seat (151) is fixedly connected to the side of the first limiting sleeve (5). A temperature sensor (152) is fixedly sleeved on the top of the fixing seat (151). The top of the temperature sensor (152) is in close contact with the bottom of the motor (24) under test.

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