Run-out detection device for rotor assembly of permanent magnet synchronous motor

Abstract

The invention provides a permanent magnet synchronous motor rotor assembly run-out detection device, which is characterized by comprising a workbench module, an internal electrical control module is arranged in the workbench module, and an XY fine adjustment sliding table measurement assembly, a to-be-detected rotor assembly, a loading tool assembly and a test power module are arranged on the workbench module. The to-be-tested rotor assembly is installed on the test power module through the top-mounted tool assembly, and the test power module drives the to-be-tested rotor assembly to perform 360-degree circumferential rotation motion. And the XY fine-tuning sliding table measuring assembly controls the displacement sensor measuring head to displace in the rotor assembly to be measured. The device is simple in positioning and installation, high in measurement precision and relatively strong in applicability, can realize full-circle automatic sampling and measurement, can directly transmit measured data to a computer for automatic processing, and can automatically obtain a judgment result according to the processed data, so that the quality control of the rotor assembly after processing is facilitated, and the unqualified rotor assembly is prevented from flowing into the next production process.

Description

Technical Field

[0001] The present invention relates to the technical field of motor detection, in particular to a device for detecting the vibration of a permanent magnet synchronous motor rotor assembly. Background Art

[0002] With the rapid development of science and technology, motors are widely used as power sources in industrial manufacturing, household appliances, transportation and other fields. For many industrial applications, such as industrial robotic arms and CNC machining centers, motor rotors are required to have high operating accuracy and low noise and vibration to ensure positioning accuracy and machining accuracy. This requires high manufacturing accuracy of the inner and outer rotors of the motor. The important indicator for measuring the machining accuracy of the inner and outer rotors of the motor is its runout. Most existing technologies consider the state of a single rotor part, and the outer surface is mostly a continuous smooth cylindrical surface, or measure the entire finished motor output shaft, without considering the measurement of the component state. In this way, when a problem occurs with the motor, the entire motor needs to be replaced.

[0003] For example, the utility model patent (CN208155249U) provides a motor runout detection device; however, this device primarily measures the runout of the output shaft of a finished motor. If the runout fails, the entire motor may need to be reassembled or reprocessed, significantly increasing manufacturing costs. Another example is the published invention patent (CN118533026A), which provides a motor shaft runout measurement device. This runout device is primarily used to measure the smooth side of the rotor shaft and is not suitable for measuring the inner wall of an external rotor motor. Another example is the utility model patent (CN222926184U), which also measures the outer side of the rotor shaft. Summary of the Invention

[0004] In order to solve the problems of the prior art, the present invention provides a permanent magnet synchronous motor rotor assembly vibration detection device, which has simple positioning and installation, high measurement accuracy, strong applicability, and can realize full-circle automatic sampling and measurement. At the same time, the measured data can be directly transmitted to the computer for automatic processing, and the judgment result is automatically output according to the processed data. This facilitates the quality control of the rotor assembly after processing and avoids unqualified products from flowing into the next production process.

[0005] The present invention provides a permanent magnet synchronous motor rotor assembly beat detection device, comprising a workbench module with an internal electrical control module arranged therein, an XY fine-tuning slide measurement assembly, a rotor assembly to be measured, an upper mounting tooling assembly and a test power module mounted on the workbench module, the rotor assembly to be measured being mounted on the test power module via the upper mounting tooling assembly, the test power module driving the rotor assembly to be measured to perform 360° circular rotational motion; the XY fine-tuning slide measurement assembly controls the displacement of a displacement sensor probe inside the rotor assembly to be measured.

[0006] Further improvements have been made to the test power module, which includes a power unit, a bearing outer ring mounting seat, a first bearing, a cross intermediate block, and a cross lower pressure cover. The first bearing is mounted on the workbench module via the bearing outer ring mounting seat. The cross intermediate block is floatingly connected to the cross lower pressure cover via a cross slot. The power unit drives the cross intermediate block and the cross lower pressure cover to rotate together through the bearing. The power unit includes a servo motor, a reducer, a synchronous pulley, and a synchronous belt, which are connected in sequence. The synchronous pulley is mounted on the workbench module via the synchronous pulley mounting seat, and the synchronous belt drives the first bearing to rotate. The first bearing is provided with a first bearing inner pressure cover and a first bearing outer pressure cover.

[0007] Further improvement, the upper tooling assembly includes a second bearing, a second bearing mounting seat, a cross upper pressure cover and a second bearing inner pressure cover, the second bearing is installed between the second bearing mounting seat and the second bearing inner pressure cover, the second bearing mounting seat is locked on the axis center of the bearing outer ring mounting seat, and the second bearing inner pressure cover is locked to the outer ring of the bearing outer ring mounting seat; the cross upper pressure cover is provided with a groove, and the cross lower pressure cover in the test power module is provided with a protruding part that cooperates with the groove, the cross upper pressure cover and the cross lower pressure cover form a cross slider coupling transmission, and the cross lower pressure cover drives the second bearing to rotate through the cross upper pressure cover.

[0008] As a further improvement, the rotor assembly to be tested includes a rotor sleeve with a magnetic steel groove on the inner wall, a bearing seat is provided on the rotor sleeve, and the second bearing is pressed into the bearing seat of the rotor sleeve through a cross upper pressure cover to drive the rotor sleeve to rotate.

[0009] A further improvement is that the XY fine-tuning slide measurement assembly includes an XY fine-tuning slide, a bracket mounting block, a probe mounting bracket, and a displacement sensor probe, all connected in sequence. The displacement sensor probe uses a large ball head. The XY fine-tuning slide is fixed to the workbench module via a vertical movable plate, a vertical plate, and a base plate.

[0010] As a further improvement, a display module is installed on the workbench module, and the display module and the displacement sensor probe are respectively connected to an external computer.

[0011] The beneficial effects of the present invention are:

[0012] 1. The positioning and installation are simple, the measurement accuracy is high, and the applicability is strong (through electrical control, the inner or outer wall, smooth surface and tooth surface can be measured). After manual installation, full-circle automatic sampling and measurement can be realized. At the same time, the measurement data can be directly transmitted to the computer for automatic processing, and the judgment result is automatically output according to the processed data. This facilitates the quality control of the rotor assembly after processing and prevents unqualified products from flowing into the next production process.

[0013] 2. The cross middle block is connected with the cross lower cover in a floating manner through the cross slot, eliminating the influence of double bearings on transmission.

[0014] 3. The cross upper cover and the cross lower cover form a cross slider coupling transmission, which avoids the influence of rigid connection on test data.

[0015] 4. The end of the displacement sensor probe adopts a large ball head design; when the large ball head at the end of the probe encounters the groove on the surface of the magnetic steel, the ball head will easily slide through the groove without getting stuck and damaging the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of a permanent magnet synchronous motor rotor assembly runout detection device;

[0018] Figure 2 This is a cross-sectional view of a test power module for a permanent magnet synchronous motor rotor assembly runout detection device;

[0019] Figure 3 This is a schematic diagram of the structure of the upper tooling of a permanent magnet synchronous motor rotor assembly runout detection device;

[0020] Figure 4 This is a schematic diagram of the XY fine-tuning slide measurement component structure;

[0021] Figure 5 It is a schematic cross-sectional view of the rotor assembly to be tested.

[0022] 1. Workbench module; 2. XY fine-tuning slide measurement assembly; 3. Display module assembly; 4. Rotor assembly to be tested; 5. Upper tooling assembly; 6. Test power module; 7. Internal electrical control module; 11. Servo motor; 12. Reducer; 13. Table panel; 14. Protective cover; 15. Synchronous pulley; 16. Synchronous pulley mounting seat; 17. Synchronous belt; 18. First bearing; 19. Cross intermediate block; 20. Cross lower pressure cover; 21. Bearing outer ring installation 1. Seat; 22. Synchronous belt tensioning module; 23. Start switch; 24. First bearing inner pressure cover; 25. First bearing outer pressure cover; 31. Bottom plate; 32. Vertical plate; 33. Vertical movable plate; 34. XY fine-tuning slide; 35. Bracket mounting block; 36. Probe mounting bracket; 37. Displacement sensor probe; 39. Magnet; 40. Rotor sleeve; 41. Second bearing; 42. Second bearing mounting seat; 43. Cross upper pressure cover; 44. Second bearing inner pressure cover. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The following provides a specific embodiment of a permanent magnet synchronous motor rotor assembly beating detection device. Figure 1 As shown, the device mainly consists of the following seven parts: a workbench module 1, an XY fine-tuning slide measurement assembly 2, a display module 3, a rotor assembly to be tested 4, an upper mounting assembly 5, a test power module 6, and an internal electrical control module 7. The XY fine-tuning slide measurement assembly 2, the rotor assembly to be tested 4, the upper mounting assembly 5, and the test power module 6 are mounted on the workbench module 1. The rotor assembly to be tested is mounted on the test power module via the upper mounting assembly. The test power module drives the rotor assembly to be tested to perform 360° circular rotation. The XY fine-tuning slide measurement assembly controls the displacement of the displacement sensor probe within the rotor assembly to be tested.

[0025] Test power module (such as Figure 2 As shown in the figure): It mainly consists of a servo motor 11, a reducer 12, a table panel 13, a protective cover 14, a synchronous wheel 15, a synchronous wheel mounting seat 16, a synchronous belt 17, a cross bearing 118, a cross intermediate block 19, a cross lower pressure cover 20, a bearing outer ring mounting seat 21, a synchronous belt tensioning module 22, a switch box 23, a first bearing inner pressure cover 24, and a first bearing outer pressure cover 25.

[0026] Working Principle: The servo motor 11 is electrically controlled as the rotational power source. The power is transmitted through the reducer 12 and the synchronous belt 17, driving the cross lower cover 20 and the cross intermediate block 19 to rotate together. The cross intermediate block 19 is connected to the cross lower cover 20 in a floating manner through a cross slot, eliminating the influence of the dual bearing fit on the transmission.

[0027] The upper tooling assembly and the rotor assembly to be tested (such as Figure 3 、 Figure 5 (As shown): The upper assembly consists of a second bearing 41, a second bearing mounting seat 42, a cross upper pressure cover 43, and a second bearing inner pressure cover 44. The second bearing 41 is mounted between the second bearing mounting seat 42 and the second bearing inner pressure cover 44. The second bearing mounting seat 42 is secured to the shaft center of the bearing outer ring mounting seat 21 with an M10 hexagon socket screw. The second bearing inner pressure cover 44 is secured to the outer ring of the bearing outer ring mounting seat 21.

[0028] The rotor assembly to be tested is composed of magnetic steel 39 and rotor sleeve 40.

[0029] Assembly method: After pressing the second bearing 41 into the bearing position of the rotor assembly, fix the outer ring of the second bearing 41 through the cross upper pressure cover 43, so that the rotor assembly to be tested and the upper assembly tooling are assembled into one.

[0030] XY fine adjustment slide measurement components (such as Figure 4 As shown in FIG: It mainly consists of a bottom plate 31, a vertical plate 32, a vertical movable plate 33, an XY fine-tuning slide 34, a bracket mounting block 35, a probe mounting bracket 36, and a displacement sensor probe 37.

[0031] Functional design: The XY fine-tuning slide 34 is used to fine-tune the displacement sensor probe 37; the bottom plate 31 can move radially, and the vertical sliding plate 32 can move vertically to achieve measurement of different axial positions of the rotor assembly.

[0032] Overall testing process:

[0033] 1. Place the assembled rotor assembly to be tested and the upper fixture vertically into the test power module, so that the groove of the cross upper cover 43 matches the protrusion of the cross middle block 9 in the test power module (similar to the cross slider coupling transmission).

[0034] 2. Lock the inner pressure cover 44 of the bearing 2 onto the bearing outer ring mounting seat 21 using screws.

[0035] 3. Adjust the measuring assembly so that the displacement sensor probe 37 and the magnet 39 in the rotor assembly 4 are aligned in the starting position (pre-loaded to a certain amount).

[0036] 4. Press the start switch on switch box 23, and the motor rotates the rotor assembly 360°, while the probe simultaneously performs on-off data acquisition. When the probe encounters a groove in magnet 39, the program controls the data acquisition process to skip that groove, preventing invalid data from interfering with the determination. The large ball tip at the end of the displacement sensor probe 37 allows it to slide easily over any grooves on the magnet surface, preventing damage.

[0037] The final collected data can be directly transferred to the computer through the USB port for data processing; the judgment results will be visually displayed on the display module, and the display light will also show different lighting states according to different results.

[0038] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, the above is only a preferred embodiment of the present invention. Since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited to this. Any technical personnel familiar with this technical field is within the technical scope disclosed by the present invention. For ordinary technical personnel in this technical field, changes or replacements that can be easily thought of should be covered within the protection scope of the present invention without departing from the principle of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A permanent magnet synchronous motor rotor assembly beat detection device, characterized in that: It includes a workbench module with an internal electrical control module, on which an XY fine-tuning slide measurement assembly, a rotor assembly to be tested, an upper tooling assembly, and a test power module are mounted. The rotor assembly to be tested is mounted on the test power module via the upper tooling assembly, and the test power module drives the rotor assembly to be tested to perform 360° circular rotation. The XY fine-tuning slide measuring assembly controls the displacement of the displacement sensor probe inside the rotor assembly to be measured.

2. The permanent magnet synchronous motor rotor assembly beat detection device according to claim 1, characterized in that: The test power module includes a power device, a bearing outer ring mounting seat, a first bearing, a cross intermediate block and a cross lower pressure cover. The first bearing is installed on the workbench module through the bearing outer ring mounting seat. The cross intermediate block is floatingly connected with the cross lower pressure cover through a cross slot. The power device drives the cross intermediate block and the cross lower pressure cover to rotate together through the bearing.

3. The permanent magnet synchronous motor rotor assembly beat detection device according to claim 2, characterized in that: The power device includes a servo motor, a reducer, a synchronous wheel and a synchronous belt which are connected in sequence, wherein the synchronous wheel is mounted on the workbench module through a synchronous wheel mounting seat, and the synchronous belt drives the first bearing to rotate.

4. The permanent magnet synchronous motor rotor assembly beat detection device according to claim 2, characterized in that: The first bearing is provided with a first bearing inner pressure cover and a first bearing outer pressure cover.

5. The permanent magnet synchronous motor rotor assembly beat detection device according to claim 2, characterized in that: The upper mounting tooling assembly includes a second bearing, a second bearing mounting seat, a cross upper pressure cover and a second bearing inner pressure cover. The second bearing is mounted between the second bearing mounting seat and the second bearing inner pressure cover. The second bearing mounting seat is locked on the axis center of the bearing outer ring mounting seat, and the second bearing inner pressure cover is locked to the outer ring of the bearing outer ring mounting seat; the cross upper pressure cover is provided with a groove, and the cross lower pressure cover in the test power module is provided with a protruding part that cooperates with the groove. The cross upper pressure cover and the cross lower pressure cover form a cross slider coupling transmission, and the cross lower pressure cover drives the second bearing to rotate through the cross upper pressure cover.

6. The permanent magnet synchronous motor rotor assembly beat detection device according to claim 5, characterized in that: The rotor assembly to be tested includes a rotor sleeve with a magnetic steel groove on the inner wall. The rotor sleeve is provided with a bearing seat. The second bearing is pressed into the bearing seat of the rotor sleeve through a cross upper pressure cover to drive the rotor sleeve to rotate.

7. The permanent magnet synchronous motor rotor assembly beat detection device according to claim 1 or 2, characterized in that: The XY fine-tuning slide measuring assembly comprises an XY fine-tuning slide, a bracket mounting block, a probe mounting bracket and a displacement sensor probe which are connected in sequence.

8. The permanent magnet synchronous motor rotor assembly beat detection device according to claim 7, characterized in that: The displacement sensor probe end adopts a large ball head.

9. The permanent magnet synchronous motor rotor assembly beat detection device according to claim 7, characterized in that: The XY fine-tuning slide is fixed on the workbench module through the vertical movable plate, the vertical plate and the bottom plate in sequence.

10. The permanent magnet synchronous motor rotor assembly beat detection device according to claim 1, characterized in that: A display module is installed on the workbench module, and the display module and the displacement sensor probe are respectively connected to an external computer.

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