High-speed dragging device and method for vibration testing of permanent magnet synchronous servo motor

Abstract

The present invention discloses a high-speed dragging device and method for vibration testing of a permanent magnet synchronous servo motor, and relates to the technical field of motor vibration testing. The present invention includes a test platform and a motor to be tested, which are arranged on a test box, and a drive roller is arranged on the driving end of the motor to be tested, and also includes: a positioning test unit, which includes a positioning component and a test component; a drag load unit, which includes a loading component, a shock absorbing component and an acceleration component. The advantage is that the present invention can synchronously perform a vibration velocity test and an overall displacement vibration test on the driving end of the motor to be tested, and can realize flexible adjustment of the load amount in a non-stop dragging state, which can not only improve the test efficiency, but also increase the sample data of the test and improve the accuracy of the test results. At the same time, effective shock absorption can be performed when adjusting the load to avoid vibration transmission to the motor to be tested and affect the accuracy of the test results, and the test accuracy is higher.

Description

Technical Field

[0001] The invention relates to the technical field of motor vibration testing, and in particular to a high-speed driving device and method for vibration testing of a permanent magnet synchronous servo motor. Background Art

[0002] A permanent magnet synchronous servo motor is a motor made using the principle that permanent magnets generate magnetic fields in coordination with electric currents. It has the advantages of high efficiency and high power density. After preparation, permanent magnet synchronous servo motors are usually subjected to vibration tests to determine the performance of the servo motor. During vibration tests, a dragging device is usually used to apply load pressure to simulate the performance of the servo motor under actual working conditions, thereby improving the accuracy of the test results.

[0003] Existing dragging devices use a variety of methods to achieve the dragging and loading of the servo motor, such as the high-speed dragging device for motor vibration testing with publication number CN114577423B, which includes a vibration table body and a vibration source, the vibration table body is provided with a driving motor and a variable speed transmission mechanism that is transmission-matched with the vibration source, the variable speed transmission mechanism includes a gearbox, a motor loading position and at least two transmission shafts are provided in the gearbox, the driving shaft of the driving motor is transmission-connected with any transmission shaft through a flexible transmission sleeve, and a speed transmission belt group is provided between the motor shaft of the motor to be tested and the transmission shaft and between adjacent transmission shafts;

[0004] When the existing dragging device is dragging and loading the servo motor to be tested, if the load amount needs to be adjusted, the servo motor needs to be stopped before loading, and the test can be continued after the loading is completed, which is inefficient. For example, in the above-mentioned prior art, when the device is adjusting the load, the drive motor needs to be stopped before loading, and some devices that can be loaded without stopping will generate certain vibrations during the loading process due to the change of the load amount. This part of the vibration will be transmitted to the servo motor, thereby increasing the vibration amount of the servo motor, affecting the accuracy of the vibration test results;

[0005] Therefore, it is urgent to design a high-speed driving device and method for vibration testing of permanent magnet synchronous servo motors to solve the above problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a high-speed driving device and method for vibration testing of a permanent magnet synchronous servo motor, which solves the problems raised in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-speed traction device applied to the vibration test of a permanent magnet synchronous servo motor, comprising a test platform and a motor to be tested arranged on a test box, and a driving roller is arranged on the driving end of the motor to be tested, and further comprising:

[0008] The positioning test unit is arranged on the test platform and is used to realize efficient positioning and vibration testing of the motor to be tested. The positioning test unit includes a positioning component and a testing component. The positioning component is used to realize rapid positioning of the motor to be tested, and the testing component is used to realize vibration testing of the motor to be tested and record the results.

[0009] The drag load unit is arranged on the test platform and is used for realizing non-stop loading when the motor to be tested is subjected to vibration test. The drag load unit comprises a loading component, a shock absorbing component and an accelerating component. The loading component is used for realizing non-stop loading of the motor to be tested, the shock absorbing component is used for reducing the loading vibration of the driving roller during the loading process and improving the stability of the loading process, and the accelerating component is used for realizing rapid speed-up of the loading component and promoting the vibration test efficiency of the motor to be tested.

[0010] Preferably, the positioning assembly includes a displacement groove opened on the test platform, a displacement plate is slidably installed in the displacement groove, two fixing frames are fixedly installed on the displacement plate, the motor to be tested is placed on the displacement plate, and the motor to be tested is located between the two fixing frames, and a clamping mechanism is provided on both of the fixing frames.

[0011] Preferably, the clamping mechanism comprises a threaded adjustment rod threadedly mounted on a fixing frame, a positioning clamping plate is fixedly mounted on the fixing frame via two elastic limiting rods, a connecting shaft is fixedly mounted on the positioning clamping plate, and the connecting shaft is rotatably connected to the threaded adjustment rod.

[0012] Preferably, the test assembly includes two displacement sensors fixedly installed in the displacement groove and used to test the displacement distance of the displacement plate, and the two displacement sensors are respectively fitted with the sides of the displacement plate, a positioning rod for adjusting the position is fixedly installed on the displacement plate, and a center position pole cooperating with the positioning rod is arranged at the center line position of the test platform, a mounting frame is arranged on the test platform, and a vibration velocity sensor cooperating with the driving roller is arranged on the mounting frame.

[0013] Preferably, the test platform is provided with a protective cover, a fixed cylinder is fixedly installed in the protective cover, a shock-absorbing shaft is installed in the fixed cylinder through a mounting assembly, and the mounting assembly cooperates with the driving roller, and the shock-absorbing assembly is arranged in the fixed cylinder and cooperates with the shock-absorbing shaft;

[0014] The mounting assembly includes a mounting plate rotatably mounted in a fixed cylinder, a mounting ring fixedly mounted in the mounting plate, a clamping plate fixedly mounted on the driving roller, and the clamping plate cooperates with the mounting ring, a connecting plate fixedly mounted on the mounting plate via a plurality of mounting rods, and a shock-absorbing shaft fixedly mounted on the connecting plate.

[0015] Preferably, the shock absorbing assembly includes a shock absorbing cylinder fixedly installed in a fixed cylinder, a built-in cavity is opened in the shock absorbing cylinder, and the built-in cavity is filled with damping hydraulic oil for absorbing vibration potential energy, a plurality of connecting pipes are fixedly connected in the shock absorbing cylinder, and a contact piston rod is slidably installed in each connecting pipe, and each contact piston rod is pressed and fitted with the shock absorbing shaft, and two shock absorbing springs are fixedly installed between each contact piston rod and the corresponding connecting pipe.

[0016] Preferably, the acceleration assembly includes an outer gear ring fixedly mounted on the shock absorber shaft, a plurality of driven gears are rotatably mounted in the protective cover via a plurality of mounting plates, and the plurality of driven gears are all meshed with the outer gear ring, a loading shaft is rotatably mounted in the protective cover, a speed regulating gear is fixedly mounted on the loading shaft, and the plurality of driven gears are all meshed with the speed regulating gear.

[0017] Preferably, the loading assembly includes a driven disk fixedly mounted on the loading shaft, two hydraulic push rods fixedly mounted inside the driven disk, push rods fixedly mounted on the driving ends of the two hydraulic push rods, two limit pressure frames fixedly mounted on the driven disk, and the two limit pressure frames are respectively sleeved on the outside of the two push rods, and a plurality of load mechanisms are mounted on the loading shaft.

[0018] Preferably, the loading mechanism comprises a loading disc sleeved on the loading shaft, the loading disc is provided with a limiting circular groove matched with two push rods, a plurality of through holes are provided in the loading disc, and a shock absorbing member matched with the push rod is provided in each through hole;

[0019] The shock-absorbing component includes a shock-absorbing outer ring, and the shock-absorbing outer ring is fixedly installed in the through hole. A plurality of shock-absorbing rubber rollers are arranged at equal intervals on the inner circumference of the shock-absorbing outer ring, and a shock-absorbing inner ring is fixedly installed on one side of the plurality of shock-absorbing rubber rollers away from the shock-absorbing outer ring, and the pushing card rod is located in the shock-absorbing inner ring.

[0020] A high-speed dragging method for a permanent magnet synchronous servo motor vibration test and a high-speed dragging device for the above-mentioned servo motor vibration test include the following steps:

[0021] S1. When performing a vibration test on a servo motor, first place the motor to be tested in a positioning test unit, and use a positioning assembly to complete the clamping and positioning of the motor to be tested;

[0022] S2, then connecting the test assembly to the motor to be tested to realize the overall displacement vibration detection and the vibration speed detection of the driving roller when the motor to be tested is working;

[0023] S3, connecting the driving roller of the motor to be tested to the shock absorbing component in the drag load unit, and then starting the motor to be tested to start the vibration test;

[0024] S4. During the vibration test, the load is dragged and loaded on the driving roller in a timely and quantitative manner through the loading component, and the vibration data of the motor to be tested is recorded in real time;

[0025] S5. When loading the driving roller, the driving roller is damped by the damping assembly to avoid the vibration generated during loading from having a negative impact on the driving roller and affecting the accuracy of the vibration test data;

[0026] S6. After the loading component is loaded, the loading component is accelerated by the acceleration component to increase the operating speed of the loading component, reduce the operating pressure of the motor to be tested and improve the efficiency of the vibration test.

[0027] The present invention provides a high-speed driving device and method for vibration testing of a permanent magnet synchronous servo motor. It has the following beneficial effects:

[0028] 1. When the traction device is conducting a vibration test on the servo motor to be tested, the displacement sensors on both sides are used for synchronous testing, which can effectively detect the vibration data of the motor to be tested when it is working. At the same time, the vibration velocity sensor is used in contact with the driving roller of the motor to be tested, which can accurately detect the vibration data of the driving roller of the motor to be tested, and the test result is more accurate.

[0029] 2. When the dragging device is dragging and loading the servo motor to be tested, the pushing of the hydraulic push rod and the locking of the loading plate can realize the non-stop loading of the motor to be tested, and the load of the motor to be tested can be flexibly increased or decreased according to the test requirements, thereby increasing the number of test samples and improving the detection accuracy.

[0030] 3. When the dragging device is dragging and loading the servo motor to be tested, when the load is increased and vibration is generated, the vibration can be effectively offset by the cooperation of the shock-absorbing component, so as to prevent the vibration from being transmitted to the driving roller of the motor to be tested, thereby preventing the vibration generated by the loading from affecting the normal test of the motor to be tested.

[0031] 4. When the dragging device is dragging and loading the servo motor to be tested, after loading is completed, the loading component can be efficiently accelerated through the cooperation of the acceleration component, thereby increasing the operating speed of the loading component and reducing the operating pressure applied by the loading component to the motor to be tested, thereby achieving effective protection of the motor to be tested.

[0032] In summary, the present invention can simultaneously perform vibration velocity testing and overall displacement vibration testing on the driving end of the motor to be tested, and can realize flexible adjustment of the load amount in a non-stop dragging state, which can not only improve the test efficiency, but also increase the sample data of the test and improve the accuracy of the test results. At the same time, effective shock absorption can be performed when adjusting the load to avoid vibration transmission to the motor to be tested and affect the accuracy of the test results, and the test accuracy is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0034] Figure 1 It is a structural schematic diagram of a high-speed driving device applied to a vibration test of a permanent magnet synchronous servo motor proposed by the present invention;

[0035] Figure 2 for Figure 1 Schematic diagram of the upper structure of the test platform;

[0036] Figure 3 for Figure 2 A schematic diagram of the structure of the positioning test unit;

[0037] Figure 4 for Figure 3 Schematic diagram of the structure after removing the test platform;

[0038] Figure 5 for Figure 4 A schematic diagram of the structure of the middle fixing frame;

[0039] Figure 6 for Figure 2 Schematic diagram of the internal structure of the middle protective cover;

[0040] Figure 7 for Figure 6 Schematic diagram of the structure after removing the protective cover;

[0041] Figure 8 for Figure 7 Schematic diagram of the internal structure of the middle fixed cylinder;

[0042] Fig. 9 for Figure 8 Schematic diagram of the internal structure of the middle shock absorber;

[0043] Fig.10 for Figure 8 Front view of the internal structure of the middle shock absorber;

[0044] Fig.11 for Figure 7 Schematic diagram of the structure of the middle shock absorber shaft and the outer gear ring;

[0045] Fig.12 for Figure 7 Structural diagram of the middle loading shaft and driven disc;

[0046] Fig.13 for Fig.12 Schematic diagram of the structure of the middle loading plate and the hydraulic push rod;

[0047] Fig.14 for Fig.13 Structural front view of the middle shock absorber.

[0048] In the figure: 1 test box, 2 test platform, 3 displacement slot, 4 placement displacement plate, 5 motor to be tested, 6 protective cover, 7 control console, 8 adjustment rod, 9 fixed frame, 10 displacement sensor, 11 driving roller, 12 clamping plate, 13 positioning clamp, 14 threaded adjustment rod, 15 elastic limit rod, 16 fixed cylinder, 17 shock-absorbing shaft, 18 external gear ring, 19 driven plate, 20 loading shaft, 21 loading plate, 22 shock-absorbing cylinder, 23 mounting plate, 24 mounting ring, 25 built-in cavity, 26 connecting pipe, 27 contact piston rod, 28 shock-absorbing spring, 29 speed regulating gear, 30 driven gear, 31 hydraulic push rod, 32 limit pressure frame, 33 push clamp rod, 34 shock-absorbing member, 35 limit circular groove, 36 shock-absorbing rubber roller, 37 mounting plate. DETAILED DESCRIPTION

[0049] 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.

[0050] Example 1: Reference Figure 1-Figure 2 , a high-speed dragging device applied to vibration test of permanent magnet synchronous servo motor, comprising a test platform 2 and a motor to be tested 5 arranged on a test box 1, wherein the test box 1 is used to carry the dragging device on the upper part of the test platform 2 and provide a driving source for the vibration test of the servo motor;

[0051] A driving roller 11 is provided on the driving end of the motor 5 to be tested. The driving roller 11 is an output extension shaft of the motor 5 to be tested and is used to connect with a traction device to achieve high-speed traction and loading, so as to simulate the operating state of the motor 5 to be tested under different working conditions.

[0052] The dragging device also includes:

[0053] The positioning test unit is arranged on the test platform 2, and is used to realize efficient positioning and vibration testing of the motor 5 to be tested, realize stable clamping and positioning of the motor 5 to be tested, and simultaneously perform accurate displacement vibration detection and vibration speed detection on the motor 5 to be tested, with higher detection accuracy;

[0054] The drag load unit is arranged on the test platform 2, and is used to realize non-stop loading when the motor 5 to be tested is subjected to vibration testing. According to the test requirements, the load of the motor 5 to be tested can be flexibly increased or decreased, the number of test samples can be increased, and vibration can be offset and weakened during loading to avoid the vibration generated during loading affecting the motor 5 to be tested, thereby improving the detection accuracy.

[0055] Example 2: Reference Figure 2-Figure 5, the technical solution of this embodiment is different from that of the first embodiment in that: the positioning test unit includes a positioning component and a test component, wherein the positioning component is used to realize the rapid positioning of the motor 5 to be tested, and the test component is used to realize the vibration test and result recording of the motor 5 to be tested;

[0056] The positioning assembly includes a displacement slot 3 provided on the test platform 2, a displacement plate 4 is slidably installed in the displacement slot 3, two fixing frames 9 are fixedly installed on the displacement plate 4, the motor 5 to be tested is placed on the displacement plate 4, and the motor 5 to be tested is located between the two fixing frames 9, the displacement slot 3 and the displacement plate 4 cooperate with each other to enable the displacement plate 4 to slide horizontally in the displacement slot 3, thereby indirectly reflecting the displacement distance of the motor 5 to be tested during the vibration test of the motor 5 to be tested;

[0057] The two fixing frames 9 are both provided with a clamping mechanism, which includes a threaded adjustment rod 14 threadedly mounted on the fixing frame 9, a positioning clamping plate 13 is fixedly mounted on the fixing frame 9 through two elastic limiting rods 15, a connecting shaft is fixedly mounted on the positioning clamping plate 13, and the connecting shaft is rotatably connected to the threaded adjustment rod 14;

[0058] When conducting a vibration test on the motor 5 to be tested, the motor 5 to be tested is first placed on the placement displacement plate 4, and then the two threaded adjustment rods 14 are rotated to drive the two positioning clamps 13 to move, so that the two positioning clamps 13 are respectively moved to fit with the side edges of the motor 5 to be tested. The two positioning clamps 13 cooperate with each other to firmly clamp and position the motor 5 to be tested, so that it will not be displaced relative to the positioning clamps 13 during the vibration test, that is, during the vibration test of the motor 5 to be tested, its relative position with the placement displacement plate 4 will not change, so that the vibration of the motor 5 to be tested can be more intuitively exerted on the placement displacement plate 4 as a whole, and the vibration degree can be judged by the displacement of the placement displacement plate 4, which is more intuitive and convenient.

[0059] In a further embodiment, the test assembly includes two displacement sensors 10 fixedly installed in the displacement slot 3 for testing the displacement distance of the placement displacement plate 4, and the two displacement sensors 10 are respectively fitted with the side portions of the placement displacement plate 4, a position adjustment rod 8 for adjusting the position is fixedly installed on the placement displacement plate 4, and a mid-position benchmark rod matched with the position adjustment rod 8 is provided at the midline position of the test platform 2;

[0060] After the motor 5 to be tested is placed and positioned, the two adjustment rods 8 are used to drive the displacement plate 4 to move as a whole, and the adjustment rod 8 is made flush with the center mark, so that the displacement plate 4 is adjusted to be exactly in the center line position, that is, the distances between its two sides and the two displacement sensors 10 are the same. When the motor 5 to be tested generates vibration during the test and drives the displacement plate 4 to move, the displacement sensors 10 on the two sides will synchronously monitor the displacement distance. By comparing the displacement data of the two displacement sensors 10 with each other, the test result can be made more accurate.

[0061] The test platform 2 is provided with a mounting frame, and a vibration velocity sensor matched with the driving roller 11 is provided on the mounting frame. The vibration velocity sensor matches with the driving roller 11, and can monitor the vibration velocity of the driving roller 11 in real time when the motor 5 to be tested drives the driving roller 11 to rotate, so that the test range is wider;

[0062] A protective cover 6 is provided on the test platform 2, and a control console 7 is provided on the upper part of the protective cover 6. The control console 7 is used to control the opening and closing and operating status of the positioning test unit and the drag load unit, realize automatic program control, effectively avoid errors, and improve test accuracy.

[0063] Example 3: Reference Figure 2 as well as Figure 6-Figure 14 The technical solution of this embodiment is different from that of the second embodiment in that the drag load unit includes a loading component, a shock absorbing component and an accelerating component, wherein the loading component is used to realize non-stop loading of the motor 5 to be tested, the shock absorbing component is used to reduce the loading vibration of the driving roller 11 during the loading process and improve the stability of the loading process, and the accelerating component is used to realize rapid speed-up of the loading component and promote the vibration test efficiency of the motor 5 to be tested.

[0064] A fixed cylinder 16 is fixedly installed in the protective cover 6, a shock-absorbing shaft 17 is installed in the fixed cylinder 16 through a mounting assembly, and the mounting assembly cooperates with the driving roller 11, and the shock-absorbing assembly is arranged in the fixed cylinder 16 and cooperates with the shock-absorbing shaft 17;

[0065] The mounting assembly includes a mounting plate 23 rotatably mounted in the fixing cylinder 16, a mounting ring 24 is fixedly mounted in the mounting plate 23, a clamping plate 12 is fixedly mounted on the driving roller 11, and the clamping plate 12 cooperates with the mounting ring 24, a connecting plate is fixedly mounted on the mounting plate 23 through a plurality of mounting rods, and a shock absorbing shaft 17 is fixedly mounted on the connecting plate;

[0066] When the motor 5 to be tested is placed, the position of the motor 5 to be tested is adjusted so that the engaging disk 12 on the driving roller 11 is engaged with the mounting ring 24 in the mounting disk 23, thereby completing the connection and fixation between the driving roller 11 and the mounting disk 23. At this time, when the motor 5 to be tested is started to drive the driving roller 11 to rotate, the mounting disk 23 will be driven to rotate through the mounting ring 24. When the mounting disk 23 rotates, the connecting disk and the shock absorber shaft 17 will be driven to rotate together through the mounting rod.

[0067] In a further embodiment, the acceleration assembly includes an outer gear ring 18 fixedly mounted on the shock absorber shaft 17, a plurality of driven gears 30 are rotatably mounted in the protective cover 6 through a plurality of mounting plates 37, and the plurality of driven gears 30 are all meshed with the outer gear ring 18, a loading shaft 20 is rotatably mounted in the protective cover 6, a speed regulating gear 29 is fixedly mounted on the loading shaft 20, and the plurality of driven gears 30 are all meshed with the speed regulating gear 29, and the number of teeth of the outer gear ring 18 is greater than the number of teeth of the speed regulating gear 29 and the driven gear 30, and the number of teeth of the speed regulating gear 29 is greater than the number of teeth of the driven gear 30;

[0068] When the damping shaft 17 rotates, it drives the outer gear ring 18 to rotate. When the outer gear ring 18 rotates, it drives multiple driven gears 30 meshing therewith to rotate. When the multiple driven gears 30 rotate, they drive the speed regulating gear 29 to rotate. When the speed regulating gear 29 rotates, it drives the loading shaft 20 to rotate.

[0069] The loading assembly includes a driven disk 19 fixedly mounted on the loading shaft 20, in which two hydraulic push rods 31 are fixedly mounted, and push clamping rods 33 are fixedly mounted on the driving ends of the two hydraulic push rods 31. When the loading shaft 20 rotates, the driven disk 19 thereon will be driven to rotate, and when the hydraulic push rods 31 in the driven disk 19 are started, the push clamping rods 33 on the driving end thereof will be driven to move.

[0070] A plurality of loading mechanisms are mounted on the loading shaft 20, and the loading mechanisms include a loading disc 21 sleeved on the loading shaft 20, and a limiting circular groove 35 is provided on the loading disc 21 to cooperate with two push rods 33, and a plurality of through holes are provided in the loading disc 21, and a shock absorbing member 34 is provided in each through hole to cooperate with the push rod 33;

[0071] When the push-clip rod 33 moves, it will be engaged with the shock-absorbing member 34 in the through hole in the loading disk 21. At this time, the rotation of the push-clip rod 33 will drive the shock-absorbing member 34 to rotate, thereby driving the loading disk 21 to rotate on the loading shaft 20, thereby increasing the load pressure and the load of the driving roller 11. The number of engagements with the loading disk 21 can be controlled by adjusting the moving distance of the push-clip rod 33, so as to apply different load amounts to the driving roller 11, so as to simulate the operating state of the motor 5 to be tested under different working conditions;

[0072] When the push rod 33 is engaged, the driving roller 11 is first decelerated to a certain extent, and then the hydraulic push rod 31 is started to push the push rod 33 to move until it is first squeezed and fitted with the limiting circular groove 35 on the loading disk 21. At this time, the push rod 33 will be squeezed and rotated in the limiting circular groove 35, and the pushing pressure of the push rod 33 will be gradually increased while squeezing and rotating, so that when the push rod 33 is rotated to cooperate with one of the shock absorbers 34, it will be directly inserted into the shock absorber 34, thereby completing the locking connection. At this time, the rotation of the push rod 33 will drive the loading disk 21 to rotate, and the loading is completed. Through the above operation, the loading of the motor 5 to be tested can be achieved without stopping, which can effectively improve the test efficiency.

[0073] The acceleration component plays an accelerating role. The damping shaft 17 with a relatively low rotation speed drives the outer gear ring 18 to rotate at a low speed. The rotation of the outer gear ring 18 drives multiple driven gears 30 to rotate. Since the number of teeth of the driven gear 30 is reduced, the rotation speed of the driven gear 30 is increased. Multiple driven gears 30 drive the speed regulating gear 29 to rotate. The number of teeth of the speed regulating gear 29 increases, and the rotation speed is relatively reduced. Since the overall number of teeth of the speed regulating gear 29 is less than the number of teeth of the outer gear ring 18, that is, the overall rotation speed of the speed regulating gear 29 is greater than the rotation speed of the outer gear ring 18, the loading shaft 20 is accelerated. That is, after the loading is completed, the loading shaft 20 and the loading disk 21 thereon can be quickly accelerated through the setting of the acceleration component, so that the loading disk 21 can be quickly accelerated to the predetermined detection speed, thereby effectively improving the detection efficiency.

[0074] In a further embodiment, two limit pressure frames 32 are fixedly installed on the driven disk 19, and the two limit pressure frames 32 are respectively sleeved on the outside of the two pushing rods 33. The two limit pressure frames 32 are used to limit and pressure the pushing rods 33. When the pushing rod 33 drives the loading disk 21 to rotate, a rotational torque is applied to the pushing rod 33 through the limit pressure frames 32, thereby driving the loading disk 21 to rotate, thereby reducing the load pressure at the driving end of the hydraulic pushing rod 31, and preventing the driving end of the hydraulic pushing rod 31 from directly driving the loading disk 21 to rotate and being damaged due to excessive pressure.

[0075] The shock absorbing member 34 includes a shock absorbing outer ring, and the shock absorbing outer ring is fixedly installed in the through hole, and a plurality of shock absorbing rubber rollers 36 are arranged at equal intervals on the inner circumference of the shock absorbing outer ring, and a shock absorbing inner ring is fixedly installed on one side of the plurality of shock absorbing rubber rollers 36 away from the shock absorbing outer ring, and the push clamp rod 33 is located in the shock absorbing inner ring;

[0076] When the push rod 33 is engaged in the shock absorbing part 34, a certain vibration will be generated due to the loading collision. Since the push rod 33 is located in the shock absorbing inner ring, the vibration can be initially weakened and offset by multiple shock absorbing rubber rollers 36 between the shock absorbing inner ring and the shock absorbing outer ring, thereby improving the loading stability.

[0077] The shock absorbing assembly includes a shock absorbing cylinder 22 fixedly installed in the fixed cylinder 16, a built-in cavity 25 is opened in the shock absorbing cylinder 22, and the built-in cavity 25 is filled with damping hydraulic oil for absorbing vibration potential energy, a plurality of connecting pipes 26 are fixedly connected in the shock absorbing cylinder 22, and a contact piston rod 27 is slidably installed in each connecting pipe 26, and each contact piston rod 27 is pressed and fitted with the shock absorbing shaft 17, and two shock absorbing springs 28 are fixedly installed between each contact piston rod 27 and the corresponding connecting pipe 26;

[0078] The vibration generated during loading will be transmitted to the shock absorber shaft 17 through the loading shaft 20 and the acceleration assembly, and the vibration generated at the shock absorber shaft 17 will act on the multiple contact piston rods 27 that are in close contact with it;

[0079] For example, the upper contact piston rod 27 will slide upward in the corresponding connecting pipe 26 when subjected to upper vibration, thereby squeezing the damping hydraulic oil in the connecting pipe 26 and squeezing it into the built-in cavity 25 in the shock absorber cylinder 22. Since the damping hydraulic oil in the built-in cavity 25 is fully filled, when the damping hydraulic oil in the built-in cavity 25 increases, the excess damping hydraulic oil will be pressed into the lower connecting pipe 26, thereby pushing the contact piston rod 27 in the side connecting pipe 26 to move downward, thereby forming a mutual pressing effect with the upper contact piston rod 27, thereby achieving shock absorption and stability of the shock absorber shaft 17;

[0080] At the same time, the movement of the contact piston rod 27 will compress or stretch the shock-absorbing spring 28 at the corresponding position, and utilize the shock-absorbing effect of the shock-absorbing spring 28 and the characteristics of large flow resistance and high energy consumption of the damping hydraulic oil to effectively weaken and offset the vibration potential energy, thereby achieving effective shock absorption of the shock-absorbing shaft 17, thereby preventing the vibration generated during loading from acting on the drive roller 11, preventing the drive roller 11 from being affected by the loading vibration and ultimately affecting the accuracy of the detection result.

[0081] The embodiment of the present invention further provides a high-speed driving method for a permanent magnet synchronous servo motor vibration test, and a high-speed driving device for the above servo motor vibration test, comprising the following steps:

[0082] S1. When performing a vibration test on a servo motor, first place the motor 5 to be tested in a positioning test unit, and use a positioning assembly to complete the clamping and positioning of the motor 5 to be tested;

[0083] S2, then connect the test assembly to the motor 5 to be tested, to achieve overall displacement vibration detection of the motor 5 to be tested and vibration speed detection of the driving roller 11 when the motor 5 to be tested is working;

[0084] S3, connecting the driving roller 11 of the motor 5 to be tested to the shock absorbing assembly in the drag load unit, and then starting the motor 5 to be tested to start the vibration test;

[0085] S4, during the vibration test, the load is dragged and loaded on the driving roller 11 in a timely and quantitative manner through the loading component, and the vibration data of the motor 5 to be tested is recorded in real time;

[0086] S5. When loading the driving roller 11, the driving roller 11 is damped by the damping assembly to avoid the vibration generated during loading from having a negative impact on the driving roller 11 and affecting the accuracy of the vibration test data;

[0087] S6. After the loading component is loaded, the loading component is accelerated by the acceleration component to increase the operating speed of the loading component, reduce the operating pressure of the motor 5 to be tested, and improve the efficiency of the vibration test.

[0088] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-speed traction device for vibration testing of a permanent magnet synchronous servo motor, comprising a test platform (2) and a motor to be tested (5) arranged on a test box (1), wherein a driving roller (11) is arranged on a driving end of the motor to be tested (5), and characterized in that: Also includes: A positioning test unit, arranged on the test platform (2), for realizing efficient positioning and vibration testing of the motor to be tested (5), comprising a positioning component and a testing component, wherein the positioning component is used to realize rapid positioning of the motor to be tested (5), and the testing component is used to realize vibration testing of the motor to be tested (5) and record the results; The test platform (2) is provided with a protective cover (6), a fixed cylinder (16) is fixedly installed in the protective cover (6), a shock absorbing shaft (17) is installed in the fixed cylinder (16) via a mounting assembly, the mounting assembly cooperates with the driving roller (11), and the shock absorbing assembly is arranged in the fixed cylinder (16) and cooperates with the shock absorbing shaft (17); The mounting assembly comprises a mounting plate (23) rotatably mounted in a fixed cylinder (16), a mounting ring (24) being fixedly mounted in the mounting plate (23), a clamping plate (12) being fixedly mounted on the driving roller (11), the clamping plate (12) being matched with the mounting ring (24), a connecting plate being fixedly mounted on the mounting plate (23) via a plurality of mounting rods, and a shock absorbing shaft (17) being fixedly mounted on the connecting plate; The drag load unit is arranged on the test platform (2) and is used to realize non-stop loading when the motor to be tested (5) is subjected to a vibration test. The drag load unit comprises a loading component, a damping component and an accelerating component, wherein the loading component is used to realize non-stop loading of the motor to be tested (5), the damping component is used to reduce the loading vibration of the driving roller (11) during the loading process, thereby improving the stability of the loading process, and the accelerating component is used to realize rapid acceleration of the loading component, thereby improving the vibration test efficiency of the motor to be tested (5); The shock absorbing assembly comprises a shock absorbing cylinder (22) fixedly mounted in a fixed cylinder (16), a built-in cavity (25) being provided in the shock absorbing cylinder (22), and the built-in cavity (25) being filled with damping hydraulic oil for absorbing vibration potential energy, a plurality of connecting pipes (26) being fixedly connected in the shock absorbing cylinder (22), and a contact piston rod (27) being slidably mounted in each connecting pipe (26), and each contact piston rod (27) being pressed and fitted with the shock absorbing shaft (17), and two shock absorbing springs (28) being fixedly mounted between each contact piston rod (27) and the corresponding connecting pipe (26); The acceleration assembly comprises an outer gear ring (18) fixedly mounted on the shock absorber shaft (17); a plurality of driven gears (30) are rotatably mounted in the protective cover (6) via a plurality of mounting plates (37), and the plurality of driven gears (30) are all meshed with the outer gear ring (18); a loading shaft (20) is rotatably mounted in the protective cover (6), a speed regulating gear (29) is fixedly mounted on the loading shaft (20), and the plurality of driven gears (30) are all meshed with the speed regulating gear (29); The loading assembly comprises a driven disc (19) fixedly mounted on a loading shaft (20), two hydraulic push rods (31) fixedly mounted inside the driven disc (19), a push clamping rod (33) fixedly mounted on the driving ends of the two hydraulic push rods (31), two position-limiting pressure-bearing frames (32) fixedly mounted on the driven disc (19), and the two position-limiting pressure-bearing frames (32) are respectively sleeved on the outside of the two push clamping rods (33), and a plurality of load mechanisms are mounted on the loading shaft (20); The loading mechanism comprises a loading disc (21) sleeved on the loading shaft (20), the loading disc (21) being provided with a limiting circular groove (35) cooperating with two push-pull rods (33), the loading disc (21) being provided with a plurality of through holes, and each through hole being provided with a shock absorbing member (34) cooperating with the push-pull rod (33); The shock absorbing member (34) comprises a shock absorbing outer ring, and the shock absorbing outer ring is fixedly mounted in the through hole, a plurality of shock absorbing rubber rollers (36) are arranged at equal intervals on the inner circumference of the shock absorbing outer ring, and a shock absorbing inner ring is fixedly mounted on one side of the plurality of shock absorbing rubber rollers (36) away from the shock absorbing outer ring, and the push clamp rod (33) is located inside the shock absorbing inner ring.

2. The high-speed driving device for vibration testing of a permanent magnet synchronous servo motor according to claim 1, characterized in that: The positioning assembly comprises a displacement groove (3) provided on the test platform (2), a placement displacement plate (4) being slidably mounted in the displacement groove (3), two fixing frames (9) being fixedly mounted on the placement displacement plate (4), the motor to be tested (5) being placed on the placement displacement plate (4), and the motor to be tested (5) being located between the two fixing frames (9), and a clamping mechanism being provided on both of the two fixing frames (9).

3. The high-speed dragging device for vibration testing of a permanent magnet synchronous servo motor according to claim 2, characterized in that: The clamping mechanism comprises a threaded adjustment rod (14) threadably mounted on a fixing frame (9); a positioning clamp (13) is fixedly mounted on the fixing frame (9) via two elastic limiting rods (15); a connecting shaft is fixedly mounted on the positioning clamp (13), and the connecting shaft is rotatably connected to the threaded adjustment rod (14).

4. The high-speed driving device for vibration testing of a permanent magnet synchronous servo motor according to claim 3, characterized in that: The test assembly comprises two displacement sensors (10) fixedly mounted in the displacement slot (3) and used for testing the displacement distance of the placement displacement plate (4), and the two displacement sensors (10) are respectively fitted with the side of the placement displacement plate (4), a positioning rod (8) for adjusting the position is fixedly mounted on the placement displacement plate (4), and a mid-position mark rod matched with the positioning rod (8) is arranged at the midline position of the test platform (2), and a mounting frame is arranged on the test platform (2), and a vibration speed sensor matched with the driving roller (11) is arranged on the mounting frame.

5. A high-speed dragging method for a permanent magnet synchronous servo motor vibration test, a high-speed dragging device for a servo motor vibration test as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: S1. When performing a vibration test on a servo motor, firstly place the motor to be tested (5) in a positioning test unit, and use a positioning assembly to complete the clamping and positioning of the motor to be tested (5); S2, connecting the test assembly to the motor to be tested (5) to detect the overall displacement vibration of the motor to be tested (5) and the vibration speed of the driving roller (11) when the motor to be tested (5) is working; S3, connecting the driving roller (11) of the motor to be tested (5) to the shock absorbing component in the drag load unit, and then starting the motor to be tested (5) to start the vibration test; S4, during the vibration test, the load is dragged and loaded on the driving roller (11) in a timely and quantitative manner through the loading component, and the vibration data of the motor (5) to be tested is recorded in real time; S5. When loading the driving roller (11), the driving roller (11) is damped by the damping assembly to avoid the vibration generated during loading from having a negative impact on the driving roller (11) and thus avoiding affecting the accuracy of the vibration test data; S6. After the loading component is loaded, the loading component is accelerated by the acceleration component to increase the operating speed of the loading component, thereby reducing the operating pressure of the motor (5) to be tested and improving the efficiency of the vibration test.

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