A detection device for on-line inspection of small motor loads

Abstract

The present invention relates to the technical field of detection equipment, in particular to a detection equipment for on-line inspection of the load of a small motor, which comprises a support component, including a test platform, a touch screen arranged on the test platform, a bench arranged on the test platform, and a motor under test arranged on the bench; a detection component, including a motor fixing component arranged on the bench, a limiting component arranged on the motor fixing component, a locking shaft component arranged on the bench, a resistance component arranged on the bench, and a connecting component arranged on the resistance component; a main shaft stabilizing component, including a receiving component arranged on the locking shaft component, a first bearing component arranged on the receiving component, and a second bearing component arranged on the lower side of the first bearing component. The present invention can quickly locate the motor under test, ensure that the output shaft of the motor under test does not deviate, and can extend the service life of the main shaft and the load test shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and particularly to a detection equipment for on-line inspection of small motor loads. Background Art

[0002] Small motors are widely used in life. When producing small motors, in order to detect the characteristic performance of small motors, such as input power, rated current, rated speed, etc., a rated load needs to be applied to the motor for detection. There are mainly two common motor load test methods:

[0003] ① Use a simulated fan for load inspection. A special simulated wind blade is customized with metal materials or plastic injection molding. There is a flange cylinder in the middle of the simulated wind blade, and there is a hole in the middle of the cylinder. When testing the load, the entire simulated wind blade is sleeved on the motor shaft, and the side is tightened with screws to fix it to the shaft. After the motor starts, the simulated wind blade rotates to form resistance to the air, thereby providing a fixed torque at the rated speed. For this method, each motor with a different power needs to be equipped with a different simulated fan, and there is a certain danger when rotating, and it is relatively cumbersome to install the wind blade each time. There are also difficulties in the motor fixing method, and the value of the load torque cannot be measured.

[0004] ② Use a special motor comprehensive test system to test the load. This method uses a professional hysteresis dynamometer to provide adjustable, variable, and settable load torques, and then cooperates with the comprehensive motor test system software and multiple sets of instrument equipment (such as test power supply, power meter, computer, multiple sets of calibration equipment) to test together. It is a huge test system that can comprehensively measure the various characteristic performances of the motor. During the test, there is a clamping fixture on the hysteresis dynamometer to fix the motor first, and then the shaft of the motor and the shaft head of the hysteresis dynamometer are connected to each other through a coupling. There are screws on the coupling to tighten the shaft. Finally, it is necessary to adjust the height, front-back distance, and left-right offset of the motor multiple times to ensure that the shaft center of the motor is approximately concentric with the shaft center of the hysteresis dynamometer before it can be used for testing. This process is cumbersome, and it is easy to have the phenomenon of shaft center offset, which affects the test results. When changing to a new motor, it is necessary to re-clamp and align again, and the efficiency is very low. Moreover, the hysteresis dynamometers used for testing motors of different sizes and powers are different. The common accuracies are 0.3 N·m / 1 N·m / 2 N·m, and they need to be matched with each other to obtain accurate test results. Summary of the Invention

[0005] Obviously, the above-mentioned prior art cannot be applied to rapid clamping and rapid load inspection on the motor production line. In view of the various deficiencies and defects existing in the prior art, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide a detection equipment for on-line inspection of small motor loads.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: It includes a support component, which includes a test platform, a touch screen disposed on the test platform, a bench disposed on the test platform, and a motor under test disposed on the bench; a detection component, which includes a motor fixing component disposed on the bench, a limiting component disposed on the motor fixing component, a shaft locking component disposed on the bench, a resistance component disposed on the bench, and a connection component disposed on the resistance component; a main shaft stabilizing component, which includes a receiving component disposed on the shaft locking component, a first bearing component disposed on the receiving component, a second bearing component disposed under the first bearing component, and a pressing component disposed on the first bearing component.

[0008] As a preferred solution of the detection device for on-line inspection of small motor loads of the present invention, wherein: the motor fixing component includes a mounting plate fixedly connected to the bench, four limiting columns fixedly connected to the mounting plate, a groove provided on the motor under test, a carrier provided on the groove, and four limiting holes provided on the carrier and adapted to the limiting columns.

[0009] As a preferred solution of the detection device for on-line inspection of small motor loads of the present invention, wherein: the limiting component includes a cylinder disposed on the test platform, a lifting plate fixedly connected to the telescopic end of the cylinder, an electric guide rail provided on the lifting plate, a sliding frame fixedly connected to the electric guide rail, and a pressing plate fixedly connected to the sliding frame and adapted to the motor under test.

[0010] As a preferred solution of the detection device for on-line inspection of small motor loads of the present invention, wherein: the shaft locking component includes a bearing plate fixedly connected to the bench, a pneumatic chuck fixedly connected to the bearing plate, the output shaft of the motor under test extends into the pneumatic chuck, and a pump air machine for providing gas to the pneumatic chuck is provided in the test platform. The pneumatic chuck can also be externally connected to compressed air provided by an air compressor in the factory.

[0011] As a preferred solution of the detection device for on-line inspection of small motor loads of the present invention, wherein: the resistance component includes a servo motor fixedly connected to the lower end of the bench, and a first plum coupling fixedly connected to the output shaft of the servo motor.

[0012] As a preferred solution of the detection device for on-line inspection of small motor loads of the present invention, wherein: the connection component includes a dynamic torque sensor disposed on the plum coupling, drive shafts are provided at both the upper and lower ends of the dynamic torque sensor, a second plum coupling adapted to the first plum coupling is provided on the drive shaft, a load test shaft fixedly connected to the pneumatic chuck is provided above the drive shaft, and the load test shaft is fixedly connected to the second plum coupling on the upper drive shaft through a third plum coupling.

[0013] As a preferred solution of the detection equipment for online inspection of small motor load of the present invention, the accommodating assembly includes a mounting cylinder fixedly connected to the carrier plate, a first extension groove is provided in the mounting cylinder, and a bearing cover is fixedly connected in the first extension groove.

[0014] As a preferred solution of the detection equipment for online inspection of small motor load of the present invention, wherein: the first bearing assembly includes a main shaft fixedly connected to the outer end of the load test shaft, a large circle planar thrust ball bearing is arranged in the bearing cover, a small circle planar thrust ball bearing is arranged at the lower end of the large circle planar thrust ball bearing, and a plurality of first rolling bodies are arranged between the large circle planar thrust ball bearing and the small circle planar thrust ball bearing.

[0015] As a preferred solution of the detection equipment for online inspection of small motor load of the present invention, the second bearing assembly includes a second extension groove arranged in the mounting tube, a deep groove ball bearing outer ring is arranged in the second extension groove, a deep groove ball bearing inner ring is arranged on the inner side of the deep groove ball bearing outer ring, and a second rolling body is arranged between the deep groove ball bearing outer ring and the deep groove ball bearing inner ring.

[0016] As a preferred solution of the detection equipment for online inspection of small motor load of the present invention, wherein: the clamping assembly includes a clamping ring arranged between the large circle plane thrust ball bearing and the main shaft, a first separation ring is provided at the upper end of the clamping ring, a stop washer is provided at the upper end of the first separation ring, a nut is provided at the upper end of the stop washer, a second separation ring is provided between the small circle plane thrust ball bearing and the inner ring of the deep groove ball bearing, and a wave washer is provided between the bearing cover and the outer ring of the deep groove ball bearing.

[0017] The beneficial effects of the detection equipment for online inspection of small motor loads of the present invention are as follows: all upper and lower components of a single detection station are connected through the middle main shaft and are located on the same axis. When detecting the motor, the motor shaft is placed downward on the motor fixing component, and the motor is roughly positioned by setting the limit rod and the limit hole so that the center of the motor does not deviate greatly. When placed in, the motor and the test component below are approximately on the same axis. The pneumatic chuck is then used to quickly clamp and fix the motor shaft and calibrate the axis of the motor at the same time. After clamping and calibrating, the double-station movable pressure plate arranged above is pressed downward to clamp and fix the motor. During testing, the pneumatic chuck automatically shrinks the chuck to clamp the shaft upon receiving the test signal, so that the motor can be quickly fixed and quickly connected to the load below.

[0018] Then, through the detection component set at the bottom, the torque mode of the servo motor is used to provide the load torque required by the motor (the servo motor can choose different power sizes according to needs), and the torque sensor is used to accurately detect and transmit the tested torque size to be displayed on the display in real time.

[0019] There is a main shaft stabilizing bearing assembly in the middle. The main shaft is connected to a pneumatic chuck above and a detection assembly below. The bearing system outside the main shaft can stabilize the axis of the main shaft and ensure that all components are on the same axis. At the same time, it enables the overall structure to rotate smoothly in the circumferential direction. Through the combination of multiple bearings outside the main shaft, especially the plane thrust ball bearing set, it can bear the weight of all parts such as the chuck above and the main shaft itself in the axial direction, greatly improving the service life of the main shaft and reducing the maintenance cost. In this way, rapid load detection can be achieved on the motor production line, greatly improving production efficiency. Of course, this device can not only perform load detection. By setting different detection circuits and control programs, other electrical performance parameters of the motor (such as insulation withstand voltage, three-phase resistance, insulation resistance) can also be detected while detecting the load, realizing multi-functional use of one machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is an overall schematic diagram of a detection device for on-line inspection of small motor loads.

[0022] Figure 2 It is Figure 1 an enlarged schematic diagram of the structure at position A of

[0023] Figure 3 It is a front view of a detection device for on-line inspection of small motor loads.

[0024] Figure 4 It is a schematic diagram of the external structure of the bench of a detection device for on-line inspection of small motor loads.

[0025] Figure 5 It is a sectional view of a detection device for on-line inspection of small motor loads.

[0026] Figure 6 It is Figure 5 an enlarged schematic diagram of the structure at position B of

[0027] In the figure: 100, support component; 101, test platform; 102, touch screen; 103, bench; 104, motor under test; 200, detection component; 201, motor fixing component; 201a, mounting plate; 201b, limit post; 201c, groove; 201d, carrier; 201e, limit hole; 202, limit component; 202a, cylinder; 202b, lifting plate; 202c, electric guide rail; 202d, sliding frame; 202e, pressing plate; 203, locking shaft component; 203a, carrier plate; 203b, pneumatic chuck; 203c, air pump; 204, resistance component; 204a, servo motor; 204b, first plum blossom coupling; 205, connection component; 205a, dynamic torque sensor; 205b, transmission shaft; 205c, second plum blossom coupling; 205d, load test shaft; 205e, third plum blossom coupling; 300, main shaft stabilizing component; 301, accommodating component; 301a, mounting cylinder; 301b, first extension groove; 301c, bearing cover; 302, first bearing component; 302a, main shaft; 302b, large ring flat thrust ball bearing; 302c, small ring flat thrust ball bearing; 302d, first rolling element; 303, second bearing component; 303a, second extension groove; 303b, outer ring of deep groove ball bearing; 303c, inner ring of deep groove ball bearing; 303d, second rolling element; 304, pressing component; 304a, pressing ring; 304b, first separating ring; 304c, stop washer; 304d, nut; 304e, second separating ring; 304f, wave washer. Detailed implementation manners

[0028] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the accompanying drawings of the specification.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0030] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selectively exclusive embodiment from other embodiments.

[0031] Embodiment 1, referring to Figures 1 to 6, which is the first embodiment of the present invention. This embodiment provides a detection device for on-line inspection of small motor loads, which can achieve high detection efficiency of small motors and ensure that the output shaft of small motors does not deviate. It includes a support component 100, which includes a test platform 101, a touch screen 102 arranged on the test platform 101, a bench 103 arranged on the test platform 101, and a motor under test 104 arranged on the bench 103; a detection component 200, which includes a motor fixing component 201 arranged on the bench 103, a limiting component 202 arranged on the motor fixing component 201, a shaft locking component 203 arranged on the bench 103, a resistance component 204 arranged on the bench 103, and a connecting component 205 arranged on the resistance component 204; a main shaft stabilizing component 300, which includes a receiving component 301 arranged on the shaft locking component 203, a first bearing component 302 arranged on the receiving component 301, a second bearing component 303 arranged on the lower side of the first bearing component 302, and the limiting component 202 arranged on the first bearing component 302.

[0032] Specifically, the touch screen 102 can be directly touched with fingers for debugging the test platform 101. This is prior art and will not be elaborated here. The bench 103 is composed of three square plates and four connecting rods. The four connecting rods all penetrate the square plates, and there are openings in the middle of the square plates.

[0033] Furthermore, the motor fixing component 201 includes a mounting plate 201a fixedly connected to the bench 103. Four limiting columns 201b are fixedly connected to the mounting plate 201a. There is a groove 201c on the motor under test 104. A carrier 201d is arranged on the groove 201c. Four limiting holes 201e matching the limiting columns 201b are arranged on the carrier 201d; the limiting component 202 includes a cylinder 202a arranged on the test platform 101. The telescopic end of the cylinder 202a is fixedly connected to a lifting plate 202b. An electric guide rail 202c is arranged on the lifting plate 202b. A sliding frame 202d is fixedly connected to the electric guide rail 202c. A pressing plate 202e matching the motor under test 104 is fixedly connected to the sliding frame 202d; the shaft locking component 203 wraps and is fixedly connected to a bearing plate 203a on the bench 103. A pneumatic chuck 203b is fixedly connected to the bearing plate 203a. The output shaft of the motor under test 104 extends into the pneumatic chuck 203b. A pump air machine 203c for providing gas for the pneumatic chuck is arranged in the test platform 101.

[0034] Among them, when installing the motor, the lower end of the bearing frame 201d abuts against the upper end of the bench 103, and the upper end of the bearing frame 201d abuts against the inner top of the groove 201c. Together with the pressure plate 202e, the tested motor 104 can be fixed. A box body is provided at the lower end of the test platform 101 here, and the bench 103 and the air pump 203c are both arranged in the box body, so that they are not easily damaged by being touched.

[0035] Preferably, the resistance component 204 includes a servo motor 204a fixedly connected to the lower end of the bench 103, and a first plum coupling 204b is fixedly connected to the output shaft of the servo motor 204a; the connection component 205 includes a dynamic torque sensor 205a arranged on the plum coupling. Drive shafts 205b are provided at both the upper and lower ends of the dynamic torque sensor 205a. A second plum coupling 205c that cooperates with the first plum coupling 204b is provided on the drive shaft 205b. A load test shaft 205d fixedly connected to the pneumatic chuck 203b is provided on the upper side of the drive shaft 205b. The load test shaft 205d is fixedly connected to the second plum coupling 205c on the upper drive shaft 205b through a third plum coupling 205e.

[0036] It should be noted that the servo motor 204a can provide resistance. The servo motor 204a has a torque mode. At this time, the controller of the servo motor 204a no longer controls the rotation speed and position of the servo motor 204a, but controls the output torque of the servo motor 204a, and its torque size can be controlled through the touch screen 102. The dynamic torque sensor 205a can transmit the torque data to the touch screen for display, and the controls of both the air pump 203c and the servo motor 204a can be adjusted through the touch screen 102. The control and display here are numerical control technologies in the prior art and will not be elaborated here.

[0037] In use, first place the motor 104 to be measured on the carrier 201d, such that the upper end surface of the carrier 201d abuts against the inner top of the groove 201c. Then align the limit hole 201e of the carrier 201d with the limit post 201b on the mounting plate 201a, and squeeze the carrier 201d so that the lower end surface of the carrier 201d abuts against the upper end surface of the mounting plate 201a. Then start the electric slide rail, such that the sliding frame 202d moves to drive the pressing plate 202e to move directly above the motor 104 to be measured. Then the cylinder 202a shortens, causing the lifting plate 202b to descend, driving the electric slide rail to descend, causing the sliding frame 202d to descend, and thus the pressing plate 202e descends to fix the motor 104 to be measured. At this time, the output shaft of the motor 104 to be measured extends into the pneumatic chuck 203b. Then start the pneumatic chuck 203b to fix between the pneumatic chuck 203b and the motor 104 to be measured. When the pneumatic chuck 203b clamps the output shaft of the motor 104 to be measured, the output shaft of the motor 104 to be measured can also be corrected to prevent the output shaft of the motor 104 to be measured from shifting;

[0038] During testing, first set the torque value for the servo motor 204a through the touch screen 102. The dynamic torque sensor 205a can digitalize the torque data and then display it on the touch screen 102. When the torque of the servo motor 204a is set, that is, the resistance value is set, and the resistance value is the load resistance in the motor usage scenario. Then the output shaft of the motor 104 to be measured rotates, driving the pneumatic chuck 203b to rotate (here the pneumatic chuck 203b is a multi-channel rotary joint, so when the pneumatic chuck 203b rotates, the air pipe connected to the pneumatic chuck 203b will not get entangled. This is prior art and will not be elaborated here). When the motor 104 to be measured rotates to drive the servo motor 204a to rotate, since the servo motor 204a is provided with a resistance simulating the actual usage scenario, the various parameters of the motor 104 to be measured are basically equal to the resistance in the actual usage scenario, and the test is more accurate.

[0039] In summary, by setting the pneumatic chuck 203b, servo motor 204a, dynamic torque sensor 205a, etc., during the load detection of a small motor, the limit hole 201e and the limit post 201b can be used to position the motor 104 to be measured, and the position of the motor 104 to be measured can be corrected through the pneumatic chuck 203b, so that the detection of various performances of the small motor during loading can be realized without multiple position adjustments.

[0040] Example 2, refer to Figures 1 to 6, which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a spindle stabilizing component 300 for an on-line inspection device of a small motor load, solving the problem of how to improve the service life of the load test shaft 205d and the spindle 302a. It includes a housing component 301, which includes an installation cylinder 301a fixedly connected to the bearing plate 203a. A first extension groove 301b is provided in the installation cylinder 301a, and a bearing cover 301c is fixedly connected in the first extension groove 301b; The first bearing assembly 302 includes a spindle 302a fixedly connected to the outer end of the load test shaft 205d. A large-ring flat thrust ball bearing 302b is provided in the bearing cover 301c. A small-ring flat thrust ball bearing 302c is provided at the lower end of the large-ring flat thrust ball bearing 302b. A plurality of first rolling elements 302d are provided between the large-ring flat thrust ball bearing 302b and the small-ring flat thrust ball bearing 302c; The second bearing assembly 303 includes a second extension groove 303a provided in the installation cylinder 301a. A deep groove ball bearing outer ring 303b is provided in the second extension groove 303a. A deep groove ball bearing inner ring 303c is provided inside the deep groove ball bearing outer ring 303b. A second rolling element 303d is provided between the deep groove ball bearing outer ring 303b and the deep groove ball bearing inner ring 303c; The pressing component 304 includes a pressing ring 304a provided between the large-ring flat thrust ball bearing 302b and the spindle 302a. A first separating ring 304b is provided at the upper end of the pressing ring 304a. A stop washer 304c is provided at the upper end of the first separating ring 304b. A nut 304d is provided at the upper end of the stop washer 304c. A second separating ring 304e is provided between the small-ring flat thrust ball bearing 302c and the deep groove ball bearing inner ring 303c. A wave washer 304f is provided between the bearing cover 301c and the deep groove ball bearing outer ring 303b.

[0041] Specifically, the nut 304d, the stop washer 304c, the first separating ring 304b, the pressing ring 304a, the small-ring flat thrust ball bearing 302c, the second separating ring 304e, and the deep groove ball bearing inner rotate together with the spindle 302a. The spindle 302a is fixedly connected to the load test shaft 205d. The deep groove ball bearing outer ring 303b, the wave washer 304f, and the large-ring flat thrust ball bearing 302b do not rotate together with the spindle 302a and play a role in supporting the spindle 302a.

[0042] In use, the large-ring flat thrust ball bearing 302b and the small-ring flat thrust ball bearing 302c can withstand a large amount of axial load, but their limiting speeds are not high. The outer ring 303b of the deep groove ball bearing and the inner ring 303c of the deep groove ball bearing can withstand radial loads and a small amount of axial load, and the compression ring 304a is utilized. Through the transmission of the main shaft 302a, the deep groove ball bearing (including the inner ring 303c of the deep groove ball bearing, the outer ring 303b of the deep groove ball bearing, and the second rolling element 303d, the same below) and the flat thrust ball bearing (including the large-ring flat thrust ball bearing 302b, the small-ring flat thrust ball bearing 302c, and the first rolling element 302d, the same below) are connected. The function of the second separating ring 304e is to prevent friction between the small-ring flat thrust ball bearing 302c and the inner ring 303c of the deep groove ball bearing. The function of the first separating ring 304b is to prevent friction between the nut 304d, the lock washer 304c, and the bearing cover 301c. Through the arrangement of the deep groove ball bearing and the flat thrust ball bearing, the service life of the equipment is greatly improved, the maintenance cost is reduced, and the production efficiency is increased.

[0043] In summary, by providing the main shaft stabilizing member 300, the deep groove ball bearing withstands the radial load, and the flat thrust ball bearing withstands the axial load, so that the service lives of the load test shaft 205d and the main shaft 302a are greatly improved, the maintenance cost is reduced, and the production efficiency is increased.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A detection device for on-line inspection of small motor loads, characterized in that: including a support component (100), including a test platform (101), a touch screen (102) disposed on the test platform (101), a bench (103) disposed on the test platform (101), and a motor under test (104) disposed on the bench (103); a detection component (200), including a motor fixing assembly (201) disposed on the bench (103), a limit component (202) disposed on the motor fixing assembly (201), a shaft locking component (203) disposed on the bench (103), a resistance component (204) disposed on the bench (103), and a connection component (205) disposed on the resistance component (204). In addition, the motor shaft is placed downward on the motor fixing assembly (201); a main shaft stabilizing component (300), including a receiving component (301) disposed on the shaft locking component (203), a first bearing component (302) disposed on the receiving component (301), a second bearing component (303) disposed on the lower side of the first bearing component (302), and a pressing component (304) disposed on the first bearing component (302); the shaft locking component (203) includes a carrier disk (203a) fixedly connected to the bench (103), a pneumatic chuck (203b) fixedly connected to the carrier disk (203a), the output shaft of the motor under test (104) extends into the pneumatic chuck (203b), and during testing, the pneumatic chuck (203b) automatically contracts the chuck to hold the shaft tightly upon receiving a test signal. A pump (203c) for supplying gas to the pneumatic chuck is provided in the test platform (101).

2. The detection device for online inspection of small motor loads according to claim 1, characterized in that: the motor fixing assembly (201) includes a mounting disk (201a) fixedly connected to the bench (103), four limit posts (201b) fixedly connected to the mounting disk (201a), a groove (201c) provided on the motor under test (104), a carrier frame (201d) provided on the groove (201c), and four limit holes (201e) provided on the carrier frame (201d) and adapted to the limit posts (201b).

3. The detection device for online inspection of small motor loads according to claim 2, characterized in that: the limit component (202) includes a cylinder (202a) disposed on the test platform (101), a lifting plate (202b) fixedly connected to the telescopic end of the cylinder (202a), an electric guide rail (202c) provided on the lifting plate (202b), a sliding frame (202d) fixedly connected to the electric guide rail (202c), and a pressure plate (202e) fixedly connected to the sliding frame (202d) and adapted to the motor under test (104).

4. The detection device for on-line inspection of small motor load according to claim 3, characterized in that: the resistance component (204) includes a servo motor (204a) fixedly connected to the lower end of the bench (103), and a first jaw coupling (204b) fixedly connected to the output shaft of the servo motor (204a).

5. The detection device for on-line inspection of small motor loads according to claim 4, characterized in that: The connecting component (205) includes a dynamic torque sensor (205a) provided on the jaw coupling. Drive shafts (205b) are provided at both the upper and lower ends of the dynamic torque sensor (205a). A second jaw coupling (205c) that mates with the first jaw coupling (204b) is provided on the drive shaft (205b). A load test shaft (205d) fixed to the pneumatic chuck (203b) is provided above the drive shaft (205b). The load test shaft (205d) is fixedly connected to the second jaw coupling (205c) on the upper drive shaft (205b) through a third jaw coupling (205e).

6. The detection device for on-line inspection of small motor loads according to claim 4 or 5, characterized in that: The accommodating component (301) includes a mounting cylinder (301a) fixedly connected to the bearing plate (203a). A first extension groove (301b) is provided in the mounting cylinder (301a). A bearing cover (301c) is fixedly connected in the first extension groove (301b).

7. The detection device for on-line inspection of small motor loads according to claim 6, characterized in that: The first bearing assembly (302) includes a main shaft (302a) fixedly connected to the outer end of the load test shaft (205d). A large-ring flat thrust ball bearing (302b) is provided in the bearing cover (301c). A small-ring flat thrust ball bearing (302c) is provided below the large-ring flat thrust ball bearing (302b). A plurality of first rolling elements (302d) are provided between the large-ring flat thrust ball bearing (302b) and the small-ring flat thrust ball bearing (302c).

8. The detection device for online inspection of small motor loads according to claim 7, characterized in that: The second bearing assembly (303) includes a second extension groove (303a) provided in the mounting cylinder (301a). An outer ring of a deep groove ball bearing (303b) is provided in the second extension groove (303a). An inner ring of a deep groove ball bearing (303c) is provided inside the outer ring of the deep groove ball bearing (303b). A second rolling element (303d) is provided between the outer ring of the deep groove ball bearing (303b) and the inner ring of the deep groove ball bearing (303c).

9. The detection device for on-line inspection of small motor loads according to claim 8, characterized in that: The pressing component (304) includes a pressing ring (304a) provided between the large-ring flat thrust ball bearing (302b) and the main shaft (302a). A first separating ring (304b) is provided above the pressing ring (304a). A stop washer (304c) is provided above the first separating ring (304b). A nut (304d) is provided above the stop washer (304c). A second separating ring (304e) is provided between the small-ring flat thrust ball bearing (302c) and the inner ring of the deep groove ball bearing (303c). A wave washer (304f) is provided between the bearing cover (301c) and the outer ring of the deep groove ball bearing (303b).

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