Mechanical precision comprehensive detection method and device for precise servo motor assembly line

Abstract

The invention relates to the technical field of precise servo motor assembly production lines, and provides a mechanical precision comprehensive detection method and device for a precise servo motor assembly production line, and the device comprises a pedestal, a clamping mechanism, a rotating mechanism, an output shaft optical measurement mechanism, an encoder installation shaft optical measurement mechanism, and a verticality and coaxiality measurement mechanism. The clamping mechanism fixes a motor to be measured, the rotating mechanism drives the motor to rotate, the output shaft optical measurement mechanism and the encoder installation shaft optical measurement mechanism respectively detect radial run-out of an output shaft and an encoder installation shaft, and the perpendicularity and coaxiality measurement mechanism detects coaxiality and perpendicularity of the output shaft and a flange. The control mechanism realizes automatic control, ensures on-line, rapid and multi-parameter integrated detection, improves efficiency, eliminates personal errors, and ensures high consistency and reliability of measurement results.

Description

Technical Field

[0001] This invention relates to the field of precision servo motor assembly line technology, and in particular to a comprehensive mechanical precision testing method and device for a precision servo motor assembly line. Background Technology

[0002] In the assembly process of precision servo motors, testing the motor's mechanical precision is a crucial step. The testing mainly includes the radial runout of the servo motor's output shaft, the encoder mounting runout of the shaft, the coaxiality of the output shaft with the flange, and the perpendicularity of the output shaft with the flange. The accuracy of these test parameters directly affects the motor's performance and reliability.

[0003] Currently, the main methods for detecting the runout of the output shaft, the perpendicularity of the output shaft to the flange, and the coaxiality of precision servo motors are lever dial indicators, electronic dial indicators, or coordinate measuring machines. However, these traditional testing methods have many drawbacks.

[0004] When using a lever dial indicator or electronic dial indicator for testing, the operation is cumbersome, requiring frequent tightening and loosening of the dial indicator base and adjustment of different measurement positions. The entire process takes approximately 10 minutes and is entirely manual. This testing method suffers from low measurement consistency; different operators may place the dial indicator needles in different positions, and the speed and force applied during manual rotation of the motor output shaft also vary, leading to inconsistent measurement data. Furthermore, this method has low automation, with an accuracy of only 0.002 mm, and is prone to damaging the surface of the motor's rotating shaft or flange, affecting testing accuracy and the surface quality of the motor. Additionally, manually recording measurement results hinders product traceability and results in low utilization of production resources, reducing production efficiency.

[0005] While coordinate measuring machine (CMM) offers high precision, it suffers from low efficiency. Products must be removed from the production line and transported to the CMM lab, a process that can take over 30 minutes. Furthermore, it is costly, requires highly skilled operators, and cannot meet the high efficiency and high-cycle demands of production lines.

[0006] In the prior art, there are also some implementation schemes similar to this invention. For example, the non-contact sensor method uses laser displacement sensors or capacitive sensors for non-contact measurement, which has the advantages of no contact error and high-frequency sampling, but the sensors are expensive and have requirements on surface reflectivity. The high-precision spindle reference method measures the radial deviation of the motor shaft by mounting the motor flange on an air-bearing or magnetic-bearing spindle. It has extremely high accuracy, but the equipment is expensive and is suitable for laboratories or high-end quality control.

[0007] For the coaxiality inspection of shafts and flanges, the reference shaft comparison method achieves this by establishing a high-precision reference shaft and measuring the radial offset of the rotating shaft relative to the reference shaft. However, the fitting accuracy of the flange locating pin hole or stop directly affects the measurement results. The coordinate measuring machine (CMM) can measure multiple parameters simultaneously, but offline inspection is inefficient and costly. Laser trackers or laser interferometry are suitable for large motors or on-site installation inspections, but their applicability is limited in the inspection of small motors.

[0008] In the inspection of shaft and flange perpendicularity, the end face runout conversion method measures the axial runout of the flange end face and converts it into perpendicularity error, but it assumes the flange is an ideal plane and ignores flatness error. The right-angle ruler and feeler gauge method has large subjective errors and low accuracy, and is only suitable for rough inspection. Although the laser plane interferometer is non-contact and provides full-field measurement, the equipment is expensive and requires an optical platform for vibration isolation. The spatial coordinate system fitting method collects data through multiple sensors and calculates the angle between the normal vector and the axis, which has high accuracy, but the equipment is complex and costly. Summary of the Invention

[0009] This invention provides a comprehensive mechanical precision testing method and apparatus for a precision servo motor assembly line, which addresses the shortcomings of existing precision servo motor mechanical precision testing technologies, such as low efficiency, poor consistency, and insufficient integration and automation. It achieves online, rapid, and multi-parameter integrated testing, significantly improving testing efficiency. At the same time, through a fully automated process, it eliminates human factors and ensures high consistency and reliability of measurement results.

[0010] This invention provides a comprehensive mechanical precision testing device for a precision servo motor assembly production line, comprising: Base; A clamping mechanism is used to clamp and fix the motor to be tested; A rotating mechanism is connected between the base and the clamping mechanism, and the rotating mechanism is used to drive the motor under test held by the clamping mechanism to rotate relative to the base; An output shaft optical measurement mechanism is movably connected to the base and located on one side of the clamping mechanism. The output shaft optical measurement mechanism is used to detect the radial runout of the output shaft of the motor under test. An encoder mounting shaft optical measurement mechanism is movably connected to the base and located on the other side of the clamping mechanism relative to the output shaft optical measurement mechanism. The encoder mounting shaft optical measurement mechanism is used to detect the radial runout of the encoder mounting shaft of the motor under test. A perpendicularity and coaxiality measuring mechanism is detachably connected to the output shaft of the motor under test. The perpendicularity and coaxiality measuring mechanism is used to detect the coaxiality between the output shaft of the motor under test and the mounting surface of the flange side of the motor under test, as well as the perpendicularity between the output shaft of the motor under test and the mounting surface of the flange of the motor under test. The control mechanism is electrically connected to the motor under test, the output shaft optical measurement mechanism, the encoder mounting shaft optical measurement mechanism, and the perpendicularity and coaxiality measurement mechanism.

[0011] According to the present invention, a comprehensive mechanical precision testing device for a precision servo motor assembly production line includes a base comprising a first mounting portion and a second mounting portion, the first mounting portion and the second mounting portion extending along a first direction and a second direction respectively, the first direction and the second direction being perpendicular to each other, a clamping mechanism being mounted on the first mounting portion via a rotating mechanism and located at the middle position of the second mounting portion, an output shaft optical measurement mechanism being mounted at one end of the second mounting portion along the second direction, and an encoder mounting shaft optical measurement mechanism being mounted at the other end of the second mounting portion along the second direction.

[0012] According to the present invention, a comprehensive mechanical precision testing device for a precision servo motor assembly production line further includes a clamping fixture and a locking fixture. The clamping fixture has a motor fixing position formed on it and is detachably connected to the clamping mechanism. The clamping fixture is used to position and clamp the motor under test. The locking fixture is connected to the clamping mechanism and is used to lock the clamping mechanism that clamps the motor under test.

[0013] According to the present invention, a comprehensive mechanical precision testing device for a precision servo motor assembly line includes an output shaft optical measurement mechanism comprising a first feed shaft, an output shaft optical measurement fixture, and an output shaft optical measuring instrument. The first feed shaft is movably mounted on the base along a second direction. The output shaft optical measurement fixture is fixedly connected to the first feed shaft. The output shaft optical measuring instrument is mounted on the output shaft optical measurement fixture. The first feed shaft drives the output shaft optical measuring instrument to reciprocate in the second direction toward or away from the clamping mechanism via the output shaft optical measurement fixture.

[0014] According to the present invention, a comprehensive mechanical precision testing device for a precision servo motor assembly production line includes an encoder mounting shaft optical measurement mechanism comprising a second feed shaft, an encoder mounting position optical measurement fixture, and an encoder mounting shaft optical measuring instrument. The second feed shaft is movably mounted on the base along a second direction. The encoder mounting position optical measurement fixture is fixedly connected to the second feed shaft. The encoder mounting shaft optical measuring instrument is mounted on the encoder mounting position optical measurement fixture. The second feed shaft drives the encoder mounting shaft optical measuring instrument to reciprocate in the second direction toward or away from the clamping mechanism via the encoder mounting position optical measurement fixture.

[0015] According to the present invention, a comprehensive mechanical precision testing device for a precision servo motor assembly line includes a perpendicularity and coaxiality measuring mechanism comprising a perpendicularity and coaxiality measuring fixture, a coaxiality optical measuring instrument, and a perpendicularity optical measuring instrument. The coaxiality measuring fixture comprises two connecting arms, a first connecting arm and a second connecting arm, which are arranged at an angle to each other. The coaxiality optical measuring instrument and the perpendicularity optical measuring instrument are respectively connected to the ends of the first connecting arm and the second connecting arm. The measuring centers of the coaxiality optical measuring instrument and the perpendicularity optical measuring instrument are arranged perpendicularly to each other.

[0016] According to the present invention, a comprehensive mechanical precision testing method for a precision servo motor assembly line is applied to the comprehensive mechanical precision testing device for the precision servo motor assembly line as described in any of the above claims. The testing method includes the following steps: The clamping mechanism clamps, positions, and locks the motor under test, and keeps the motor under test in a horizontal position. Connect the motor to be tested electrically and start the motor; The radial runout of the output shaft of the motor under test and the radial runout of the encoder mounting shaft are detected by the output shaft optical measurement mechanism and the encoder mounting shaft optical measurement mechanism respectively, and the pass rate is determined. The detection data is then saved. The motor under test is rotated to a vertical position using a rotating device; The coaxiality of the output shaft of the motor under test and the perpendicularity of the output shaft of the motor under test to the flange mounting surface are measured by the perpendicularity and coaxiality measuring mechanism, respectively, to determine whether they are qualified, and the test data are saved.

[0017] According to the comprehensive mechanical precision testing scheme for a precision servo motor assembly line provided by the present invention, the steps included when clamping the motor to be tested are as follows: The motor to be tested is clamped and fixed by a clamping fixture; The clamping fixture is fixed to the clamping mechanism by locking screws. The clamping fixture and the clamping mechanism are positioned by positioning pins to ensure that the measured position deviation of the motor under test after each clamping is less than 0.1mm. The locking mechanism is locked using a locking fixture.

[0018] According to the comprehensive mechanical precision testing scheme for a precision servo motor assembly line provided by the present invention, when detecting the radial runout of the output shaft of the motor under test and the radial runout of the encoder mounting shaft through the output shaft optical measurement mechanism and the encoder mounting shaft optical measurement mechanism respectively, the following steps are included: The output shaft optical measurement mechanism and the encoder mounting shaft optical measurement mechanism are controlled to move automatically to the measurement positions of the output shaft of the motor under test and the encoder mounting shaft; The motor under test is rotated by an open-loop driver, with a rotation speed of nr / min, one rotation of the output shaft in t seconds, a measurement time of T seconds, and data of two rotations of the motor shaft under test are measured. The acquisition frequency is Hz. The system determines whether the test results are qualified and saves the test data. If the runout test is qualified, the motor under test is rotated to a vertical position using a rotating device, and the test data is saved. If the test is unqualified, the equipment control system issues an alarm and saves the test data.

[0019] According to the comprehensive mechanical precision testing scheme for a precision servo motor assembly line provided by the present invention, when testing the coaxiality of the output shaft of the motor under test and the perpendicularity of the output shaft of the motor under test and the flange mounting surface through perpendicularity and coaxiality measuring mechanisms, the scheme includes the following steps: The perpendicularity and coaxiality measuring mechanism is locked onto the output shaft of the motor under test using screws; The driver uses an open-loop drive to rotate the output shaft of the motor under test clockwise two revolutions at a speed of nr / min, and then counterclockwise two revolutions at a speed of nr / min. The measurement time is 4T seconds. The coaxiality between the output shaft of the motor under test and the mounting surface on the side of the flange and the perpendicularity between the output shaft of the motor under test and the mounting surface of the flange are measured respectively. Determine whether the test results are qualified and save the test data; if the coaxiality and perpendicularity are qualified, rotate the motor under test to the lateral position, release the clamping mechanism, remove the motor and pass it to the next assembly process; if they are not qualified, the equipment control system will alarm, rotate the motor under test to the lateral position, release the clamping mechanism, remove the motor and remove it from the line.

[0020] This invention provides a comprehensive mechanical precision testing method and apparatus for a precision servo motor assembly line. The apparatus integrates a clamping mechanism, an output shaft optical measurement mechanism, an encoder mounting shaft optical measurement mechanism, and a perpendicularity and coaxiality measurement mechanism onto a single base. These mechanisms are precisely arranged around the clamping mechanism, simultaneously covering four core parameters: output shaft runout, encoder mounting shaft runout, output shaft and flange coaxiality, and perpendicularity. This eliminates the need for disassembling or transferring workpieces, achieving multi-parameter integration. Furthermore, the overall design adapts to the production line layout, eliminating the need for offline transfer and enabling online testing. Simultaneously, the clamping mechanism quickly secures the motor under test, the movable connection design of the output shaft optical measurement mechanism and the encoder mounting shaft measurement mechanism supports rapid alignment, and the detachable connection of the perpendicularity and coaxiality measurement mechanism facilitates quick assembly and disassembly. The control mechanism links all measurement mechanisms to work synchronously, avoiding waiting between processes. Compared to traditional separate equipment testing, this significantly reduces process time, achieving rapid testing and improved efficiency. In addition, the control mechanism is electrically connected to all execution or measurement units, and can automatically control the rotating mechanism to drive the motor to rotate, drive the measurement mechanism to align and acquire data, and complete the result judgment; no manual intervention is required in the measurement process, eliminating human factors such as manual positioning deviation and manual reading error; the non-contact detection characteristics of the optical measurement mechanism avoid mechanical damage interference, and the precise cooperation of each mechanism ensures uniform measurement conditions, ultimately ensuring high consistency and reliability of the results. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a left view of the comprehensive mechanical precision testing method and device for a precision servo motor assembly line provided by the present invention, when the output shaft and encoder mounting shaft are running out of space.

[0023] Figure 2 yes Figure 1 A comprehensive mechanical precision testing method and device for a medium-precision servo motor assembly line, showing the front view of the output shaft and encoder mounting shaft during runout.

[0024] Figure 3 This is a front view of the comprehensive mechanical precision testing method and device for a precision servo motor assembly line provided by the present invention, which tests the perpendicularity and coaxiality of the output shaft and flange.

[0025] Figure 4 This is a flowchart illustrating the comprehensive mechanical precision testing method for a precision servo motor assembly line provided by the present invention.

[0026] Figure label: 10. Comprehensive mechanical precision testing device for precision servo motor assembly production line; 100. Base; 110. First mounting part; 120. Second mounting part; 200. Clamping mechanism; 300. Clamping fixture; 400. Locking fixture; 500. Rotating mechanism; 600. Output shaft optical measuring mechanism; 610. First feed axis; 620. Output shaft optical measuring fixture; 630. Output shaft optical measuring instrument; 700. Encoder mounting shaft optical measuring mechanism; 710. Second feed shaft; 720. Encoder mounting position optical measuring fixture; 730. Encoder mounting shaft optical measuring instrument; 800. Perpendicularity and coaxiality measuring mechanism; 810. Perpendicularity and coaxiality measuring fixture; 820. Coaxiality optical measuring instrument; 830. Perpendicularity optical measuring instrument; 20. Motor under test; 21. Output shaft; 22. Encoder mounting shaft; 23. Flange side mounting surface; 24. Flange mounting surface. Detailed Implementation

[0027] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0028] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0030] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] The following is combined with Figures 1 to 4 The present invention provides a detailed description of the comprehensive mechanical precision testing method and device for a precision servo motor assembly production line provided by the present invention through specific embodiments and application scenarios.

[0033] In embodiments of the present invention, such as Figures 1 to 3As shown, the comprehensive mechanical precision testing device 10 for a precision servo motor assembly line includes a base 100, a clamping mechanism 200, a rotating mechanism 500, an output shaft optical measurement mechanism 600, an encoder mounting shaft optical measurement mechanism 700, and a perpendicularity and coaxiality measurement mechanism 800. The clamping mechanism 200 is used to clamp and fix the motor 20 under test. The rotating mechanism 500 is connected between the base 100 and the clamping mechanism 200, and is used to drive the motor 20 under test clamped by the clamping mechanism 200 to rotate relative to the base 100. The output shaft optical measurement mechanism 600 is movably connected to the base 100 and is located on one side of the clamping mechanism 200. The output shaft optical measurement mechanism 600 is used to detect the radial runout of the output shaft 21 of the motor under test. The optical measurement mechanism 700 is movably connected to the base 100 and is located on the other side of the clamping mechanism 200 relative to the output shaft optical measurement mechanism 600. The encoder mounting shaft optical measurement mechanism 700 is used to detect the radial runout of the encoder mounting shaft 22 of the motor under test. The perpendicularity and coaxiality measurement mechanism 800 is detachably connected to the output shaft 21 of the motor under test 20. The perpendicularity and coaxiality measurement mechanism 800 is used to detect the coaxiality between the output shaft 21 of the motor under test and the flange side mounting surface 23 of the motor under test, as well as the perpendicularity between the output shaft 21 of the motor under test and the flange mounting surface 24 of the motor under test. The control mechanism is electrically connected to the motor under test 20, the output shaft optical measurement mechanism 600, the encoder mounting shaft optical measurement mechanism 700, and the perpendicularity and coaxiality measurement mechanism 800.

[0034] The base 100 is the basic support structure of the entire mechanical precision integrated testing device. It provides a stable mounting platform for the clamping mechanism 200, the rotating mechanism 500, the output shaft optical measurement mechanism 600, the encoder mounting shaft optical measurement mechanism 700, etc., ensuring that each mechanism can maintain a relatively fixed positional relationship during the testing process, thereby ensuring the accuracy and stability of the testing.

[0035] The main function of the clamping mechanism 200 is to reliably clamp and fix the precision servo motor under test. During the testing process, the motor needs to maintain a stable posture without any shaking or displacement, otherwise the accuracy of the measurement results will be affected. The clamping mechanism 200 securely fixes the motor to the rotating mechanism 500 through a reasonable clamping method, ensuring the stability of the motor's position during rotation and measurement.

[0036] The rotating mechanism 500 is connected between the base 100 and the clamping mechanism 200. Its function is to drive the motor 20 under test, which is clamped by the clamping mechanism 200, to rotate relative to the base 100. During the testing process, in order to comprehensively and accurately measure parameters such as the radial runout of the motor output shaft 21 and the encoder mounting shaft 22, it is necessary to measure the motor at different angular positions. The rotating mechanism 500 can realize the continuous or intermittent rotation of the motor, meeting the requirements of multi-angle testing.

[0037] The output shaft optical measurement mechanism 600 is movably connected to the base 100 and located on one side of the clamping mechanism 200. It is used to detect the radial runout of the output shaft 21 of the motor under test. Through optical measurement technology, the radial displacement change of the output shaft 21 during rotation can be measured non-contactly and with high precision, thereby determining the runout of the output shaft 21.

[0038] The encoder mounting shaft optical measurement mechanism 700 is movably connected to the base 100 and is located on the other side of the clamping mechanism 200 relative to the output shaft optical measurement mechanism 600. It is used to detect the radial runout of the encoder mounting shaft 22 of the motor under test. Similar to the output shaft optical measurement mechanism 600, it achieves non-contact measurement through optical measurement technology, ensuring high accuracy and high repeatability of the measurement results.

[0039] The perpendicularity and coaxiality measuring mechanism 800 is detachably connected to the output shaft 21 of the motor under test 20. It is used to detect the coaxiality of the output shaft 21 of the motor under test and the flange side mounting surface 23, as well as the perpendicularity of the output shaft 21 and the flange mounting surface 24. Through high-precision measurement technology, the spatial geometric relationship between the motor shaft and the flange can be accurately evaluated.

[0040] The control mechanism is electrically connected to the motor under test 20, the output shaft optical measurement mechanism 600, the encoder mounting shaft optical measurement mechanism 700, and the perpendicularity and coaxiality measurement mechanism 800, respectively, to realize centralized control of the entire detection system.

[0041] Secondly, the control mechanism automatically controls the rotation of the motor, the position adjustment of the measuring mechanism, data acquisition and processing, etc., according to the preset program, so as to realize the fully automated detection process, reduce human intervention, and improve detection efficiency and consistency.

[0042] Furthermore, the control mechanism processes and analyzes the collected measurement data in real time, judges whether the measurement results are qualified according to preset standards, and outputs corresponding signals or prompts to provide a basis for production decisions.

[0043] The comprehensive mechanical precision testing device 10 for a precision servo motor assembly line of this application integrates a clamping mechanism 200, an output shaft optical measurement mechanism 600, an encoder mounting shaft optical measurement mechanism 700, and a perpendicularity and coaxiality measurement mechanism 800 onto a single base 100. Each mechanism is precisely arranged around the clamping mechanism 200, simultaneously covering four core parameters: output shaft 21 runout, encoder mounting shaft 22 runout, and the coaxiality and perpendicularity of the output shaft 21 with the flange. This eliminates the need for disassembling or transferring workpieces, achieving multi-parameter integration. Furthermore, the device is perfectly compatible with the production line layout, eliminating the need for offline transfer and enabling online testing. Simultaneously, the clamping mechanism 200 can quickly fix the motor 20 under test; the movable connection design of the output shaft optical measurement mechanism 600 and the encoder mounting shaft 22 measurement mechanism supports rapid alignment; and the detachable connection of the perpendicularity and coaxiality measurement mechanism 800 facilitates quick assembly and disassembly. The control mechanism links all measurement mechanisms to work synchronously, avoiding waiting between processes. Compared to traditional separate equipment testing, this significantly reduces process time, achieving rapid testing and improved efficiency. In addition, the control mechanism is electrically connected to all execution or measurement units, and can automatically control the rotating mechanism 500 to drive the motor to rotate, drive the measurement mechanism to align and acquire data, and complete the result judgment; no manual intervention is required in the measurement process, eliminating human factors such as manual positioning deviation and manual reading error; the non-contact detection characteristics of the optical measurement mechanism avoid mechanical damage interference, and the precise cooperation of each mechanism ensures uniform measurement conditions, ultimately ensuring high consistency and reliability of the results.

[0044] Reference Figures 1 to 3 According to the present invention, a comprehensive mechanical precision testing device 10 for a precision servo motor assembly production line includes a base 100 comprising a first mounting portion 110 and a second mounting portion 120. The first mounting portion 110 and the second mounting portion 120 extend along a first direction and a second direction, respectively, and are arranged perpendicular to each other. A clamping mechanism 200 is mounted on the first mounting portion 110 via a rotating mechanism 500 and is located in the middle of the second mounting portion 120. An output shaft optical measurement mechanism 600 is mounted on one end of the second mounting portion 120 along the second direction, and an encoder mounting shaft optical measurement mechanism 700 is mounted on the other end of the second mounting portion 120 along the second direction.

[0045] It is understood that this embodiment divides the base 100 into a first mounting portion 110 and a second mounting portion 120. Furthermore, the design of the first mounting portion 110 and the second mounting portion 120, perpendicular to each other in the first and second directions, creates an "L-shaped" stable support structure for the base 100. This provides clear mounting zones for each core mechanism. The first mounting portion 110 specifically supports the rotating mechanism 500 and the clamping mechanism 200, while the second mounting portion 120 symmetrically houses the output shaft optical measurement mechanism 600 and the encoder mounting shaft optical measurement mechanism 700. This avoids overlapping or interference in the mounting positions of the mechanisms, ensuring precise and controllable relative positions between the clamping mechanism 200 and the measuring mechanisms on both sides.

[0046] The output shaft 21 and the encoder mounting shaft optical measurement mechanism 700 are respectively mounted at both ends of the second mounting part 120 along the second direction, and the clamping mechanism 200 is located in the middle of the second mounting part 120, forming a symmetrical measurement layout. This avoids the time wasted on "sequential alignment" in the traditional asymmetrical layout and directly improves the detection efficiency; at the same time, the symmetrical structure reduces the measurement error caused by the difference in lever arm, and together with the high rigidity of the base 100, further ensures the consistency of the dual-axis runout detection data.

[0047] Compared to a single flat base 100, the vertically extended dual mounting section can more rationally distribute the weight of each mechanism, lower the center of gravity of the device, and reduce the vibration transmission during motor rotation detection; moreover, the partitioned extension design can flexibly adjust the installation direction according to the production line space, avoid the device occupying too much horizontal or vertical space, and improve the adaptability of the production line layout.

[0048] Reference Figures 1 to 3 According to the present invention, a comprehensive mechanical precision testing device 10 for a precision servo motor assembly production line further includes a clamping fixture 300 and a locking fixture 400. The clamping fixture 300 has a motor fixing position formed on it and is detachably connected to the clamping mechanism 200. The clamping fixture 300 is used to position and clamp the motor 20 to be tested. The locking fixture 400 is connected to the clamping mechanism and is used to lock the clamping mechanism 200 that clamps the motor 20 to be tested.

[0049] Understandably, the clamping fixture 300 has a motor fixing position. Through the customized design of the motor fixing position, it can be precisely matched with the flange or housing of the motor under test 20, so as to achieve rapid alignment of the motor. In conjunction with the clamping mechanism, the deviation of the measured position of the motor after clamping is controlled within 0.1mm, which solves the problem of "arbitrary position and large deviation" in traditional manual clamping, and ensures that the measurement data reflects the accuracy of the motor itself rather than the clamping error.

[0050] The locking fixture 400 is connected to the clamping mechanism 200, and its main function is to lock the clamping mechanism 200, which holds the motor 20 under test. During the testing process, the stability of the motor and the rigidity of the clamping mechanism 200 are crucial. The locking fixture 400, through its connection with the clamping mechanism 200, further enhances the stability of the entire clamping system, preventing the clamping mechanism 200 from shaking or loosening during testing.

[0051] The detachable design of clamping fixture 300 and the quick-locking function of locking fixture 400 together enable rapid changeover. When it is necessary to change to a different model of motor, the operator can quickly replace clamping fixture 300 and use locking fixture 400 to ensure that the new clamping fixture 300 is firmly fixed on clamping mechanism 200. This design significantly reduces changeover time and improves production line efficiency.

[0052] Reference Figures 1 to 3 According to the present invention, a comprehensive mechanical precision testing device 10 for a precision servo motor assembly production line includes an output shaft optical measurement mechanism 600 comprising a first feed shaft 610, an output shaft optical measurement fixture 620, and an output shaft optical measuring instrument 630. The first feed shaft 610 is movably mounted on a base 100 along a second direction. The output shaft optical measurement fixture 620 is fixedly connected to the first feed shaft 610. The output shaft optical measuring instrument 630 is mounted on the output shaft optical measurement fixture 620. The first feed shaft 610 drives the output shaft optical measuring instrument 630 to reciprocate in the second direction toward or away from the clamping mechanism 200 via the output shaft optical measurement fixture 620.

[0053] Understandably, the first feed axis 610 is movably mounted on the base 100 along the second direction, enabling the measuring fixture and measuring instrument to reciprocate towards or away from the clamping mechanism 200. This, in conjunction with the equipment control system, achieves high-precision position adjustment. This solves the problems of slow alignment and large errors associated with traditional manual adjustment of dial indicators, allowing for quick and precise alignment of the measuring instrument probe with the preset detection point on the output shaft 21. This ensures that the measurement data targets the core precision area of ​​the motor, avoiding invalid data acquisition.

[0054] The first feed axis 610 can be set by presetting the position parameters of the output shaft 21 of different motor models. The first feed axis 610 can drive the measuring mechanism to automatically match motors with different shaft lengths and diameters. There is no need to replace the measuring mechanism body. Adaptation can be completed by simply adjusting the feed axis stroke. With the replacement of the clamping fixture 300, the needs of rapid production changeover can be met, and the adaptability of the device to mixed production lines can be improved.

[0055] After the test is completed, the measuring instrument can be driven to move quickly away from the clamping mechanism 200 to a safe position to avoid collisions between the mechanism during the switching of the motor rotation posture or during the subsequent installation of tooling. At the same time, it provides working space for the operator and reduces equipment wear and safety risks.

[0056] The output shaft optical measuring fixture 620 serves as an intermediate component connecting the first feed shaft 610 and the output shaft optical measuring instrument 630. Its rigid structure design can effectively transmit the positioning accuracy of the feed shaft, while suppressing the slight displacement caused by the measuring instrument's own vibration or external force interference during high-frequency acquisition. This ensures that the measuring instrument probe always fits the detection trajectory and avoids fluctuations in measurement data caused by loose installation.

[0057] As a core component of non-contact inspection, the output shaft optical measuring instrument 630, after being stably installed with tooling, can realize high-frequency acquisition of radial displacement data during the rotation of the output shaft 21 under the drive of the feed shaft, capturing minute fluctuations; non-contact inspection avoids scratching the precision surface of the output shaft 21, eliminating any damage to the workpiece surface during the inspection process; and transmits data to the control mechanism in real time, providing original basis for subsequent automatic judgment and establishing a complete product quality traceability system.

[0058] Reference Figures 1 to 3 According to the present invention, a comprehensive mechanical precision testing device 10 for a precision servo motor assembly line includes an encoder mounting shaft optical measurement mechanism 700 comprising a second feed shaft 710, an encoder mounting position optical measurement fixture 720, and an encoder mounting shaft optical measuring instrument 730. The second feed shaft 710 is movably mounted on a base 100 along a second direction. The encoder mounting position optical measurement fixture 720 is fixedly connected to the second feed shaft 710. The encoder mounting shaft optical measuring instrument 730 is mounted on the encoder mounting position optical measurement fixture 720. The second feed shaft 21 drives the encoder mounting shaft optical measuring instrument 730 to reciprocate in the second direction toward or away from the clamping mechanism 200 via the encoder mounting position optical measurement fixture 720.

[0059] Understandably, the second feed axis 710 is movably mounted on the base 100 along the second direction, symmetrically distributed on both sides of the clamping mechanism 200 with the first feed axis 610. This allows the measuring fixture and measuring instrument to precisely approach or move away from the encoder mounting shaft 22. By calling preset parameters through the equipment control system, the measuring instrument probe can be quickly aligned with the key detection section of the encoder mounting shaft 22, solving the problems of slow alignment and easy misalignment in traditional manual adjustments. This ensures that the measurement data is focused on the core precision area of ​​the encoder installation, avoiding detection failure due to positioning deviation.

[0060] The second feed axis 710 and the first feed axis 610 are synchronously scheduled by the control mechanism. During the runout detection stage, the two sets of measuring mechanisms can be driven to complete the alignment action at the same time, realizing the synchronous detection of the runout of the output axis 21 and the encoder mounting axis 22. Compared with the traditional single-axis sequential detection mode, the alignment and measurement time is directly reduced by half, and the measurement efficiency is greatly improved.

[0061] By adjusting the feed axis stroke, the device can adapt to the different shaft lengths of the encoder mounting shaft 22 of different motor models. There is no need to change the measuring mechanism; adaptation can be completed simply by calling parameters. Combined with the quick change of the clamping fixture 300, it can meet the needs of rapid production changeover and improve the compatibility of the device with mixed production lines.

[0062] After the inspection is completed, the drive measuring instrument quickly retreats to a safe position to avoid collision with the rotating mechanism 500 when the motor switches postures. At the same time, it reserves operating space for the installation of the perpendicularity and coaxiality measuring fixture 810 to ensure smooth connection of multiple processes.

[0063] The encoder mounting optical measuring fixture 720 serves as a rigid component connecting the second feed axis 710 and the measuring instrument. It can transmit the precise positioning of the feed axis to the measuring instrument. At the same time, the high rigidity structure suppresses the vibration of the measuring instrument during high-frequency acquisition, preventing probe displacement due to loose installation and ensuring that the acquired data reflects the true accuracy of the motor rather than the equipment vibration error.

[0064] After the encoder mounting shaft optical measuring instrument 730 is stably installed with tooling, it can collect radial runout data at high frequency during motor rotation, providing a direct basis for judging the machining accuracy of the encoder mounting shaft 22. Its detection data and the runout data of the output shaft 21 are synchronously transmitted to the control mechanism, realizing the coordinated judgment of dual-axis accuracy, filling the detection blind spot of "emphasizing the output shaft 21 and neglecting the encoder shaft" in traditional testing, and ensuring full coverage of the accuracy of core components of the motor drive chain.

[0065] Reference Figures 1 to 3 According to the present invention, a comprehensive mechanical precision testing device 10 for a precision servo motor assembly line includes a perpendicularity and coaxiality measuring mechanism 800 comprising a perpendicularity and coaxiality measuring fixture 810, a coaxiality optical measuring instrument 820, and a perpendicularity optical measuring instrument 830. The coaxiality measuring fixture includes two first connecting arms and a second connecting arm arranged at an angle to each other. The coaxiality optical measuring instrument 820 and the perpendicularity optical measuring instrument 830 are respectively connected to the ends of the first connecting arm and the second connecting arm. The measuring centers of the coaxiality optical measuring instrument 820 and the perpendicularity optical measuring instrument 830 are arranged perpendicularly to each other.

[0066] Understandably, the perpendicularity and coaxiality measuring fixture 810, through two mutually angled connecting arms, allows the coaxiality optical measuring instrument 820 and the perpendicularity optical measuring instrument 830 to be deployed at different detection positions on the motor flange. The coaxiality measuring instrument at the end of the first connecting arm corresponds to the flange side mounting surface 23, and the perpendicularity optical measuring instrument 830 at the end of the second connecting arm corresponds to the flange mounting surface 24, forming a three-dimensional detection layout around the output shaft 21. This eliminates the need for multiple adjustments to the fixture to cover two spatial accuracy indicators, solving the cumbersome problem of measuring each single parameter one by one in traditional detection methods.

[0067] A coaxiality optical measuring instrument 820 is installed at the end of the first connecting arm to detect the coaxiality error between the output shaft 21 and the flange side mounting surface 23. During the bidirectional rotation of the motor, it captures the radial runout data of the flange side using a high-frequency acquisition method, and calculates the coaxiality error through data processing. This error directly reflects the degree of center offset between the output shaft 21 and the flange. This error directly affects the transmission concentricity of the motor after installation and is a key indicator to ensure the stability of motor operation.

[0068] A perpendicularity optical measuring instrument 830 is installed at the end of the second connecting arm to detect the perpendicularity error between the output shaft 21 and the flange mounting surface 24. Its measuring center is perpendicular to the coaxiality measuring instrument, and it can collect the axial runout data of the flange end face. The perpendicularity error is obtained through geometric conversion, avoiding the defect of the traditional end face runout conversion method that ignores the flange flatness error, thus improving the detection accuracy. This error directly affects the installation fit between the motor and the load and is a core indicator for avoiding operational vibration.

[0069] Reference Figure 4 The present invention also provides a comprehensive mechanical precision testing method for a precision servo motor assembly line, applied to the comprehensive mechanical precision testing device 10 of the precision servo motor assembly line as described above. The testing method includes the following steps: The clamping mechanism 200 clamps, positions, and locks the motor 20 under test, ensuring it is in a horizontal position. This precise clamping and locking eliminates any shaking or displacement of the motor during measurement. Motor stability is crucial when detecting parameters such as radial runout of the motor output shaft 21 and encoder mounting shaft 22. Movement of the motor during measurement leads to inaccurate data captured by the measuring instrument, affecting the assessment of the motor's mechanical precision. Fixing the motor in a horizontal position using the clamping mechanism 200 provides a stable and reliable foundation for subsequent measurements, ensuring the accuracy and reliability of the measurement results.

[0070] Electrically connect the motor under test 20 and start the motor under test 20; it can be understood that by connecting the motor power line, the control mechanism links the motor drive unit to achieve open-loop control start.

[0071] The radial runout of the output shaft 21 and the encoder mounting shaft 22 of the motor under test are detected by the output shaft optical measurement mechanism 600 and the encoder mounting shaft optical measurement mechanism 700, respectively, to determine whether they are qualified and the detection data is saved. It can be understood that the output shaft optical measurement mechanism 600 and the encoder mounting shaft optical measurement mechanism 700 can accurately measure the radial runout of these two shafts using optical principles, providing accurate data support for evaluating the mechanical precision of the motor. The control mechanism analyzes and judges the measurement data in real time according to preset standards to determine whether the measurement results meet the quality standards, ensuring that only qualified motors can enter the next inspection or assembly process. Saving the detection data provides a basis for motor quality traceability.

[0072] The motor under test 20 is rotated to a vertical position using a rotating device; it can be understood that the motor under test 20 is rotated from a horizontal position to a vertical position in preparation for coaxiality and perpendicularity testing.

[0073] The perpendicularity and coaxiality measuring mechanism 800 detects the coaxiality of the output shaft 21 of the motor under test 20 with the flange side mounting surface 23 and the perpendicularity of the output shaft 21 of the motor under test 20 with the flange mounting surface 24, respectively, to determine whether it is qualified and saves the detection data. It can be understood that the perpendicularity and coaxiality measuring mechanism 800 detects the coaxiality of the output shaft 21 with the flange side mounting surface 23 and the perpendicularity of the output shaft 21 with the flange mounting surface 24 to ensure the installation accuracy of the motor and improve the reliability and performance of the entire system. The control mechanism analyzes and judges the measurement data in real time according to preset standards to determine whether the measurement results meet the quality standards. This ensures that only qualified motors can enter the next inspection or assembly process. The detection data is saved for subsequent quality traceability and data analysis.

[0074] In one embodiment, according to the comprehensive mechanical precision testing scheme for a precision servo motor assembly line provided by the present invention, the steps included when clamping the motor 20 to be tested are as follows: The clamping fixture 300 is used to clamp and fix the motor 20 under test. It is understood that the clamping fixture 300 is a component specifically designed to fix the motor 20 under test. It provides initial clamping force to ensure that the motor does not move or wobble during clamping. The clamping fixture 300 can be adjusted or replaced according to different motor models, improving the versatility and flexibility of the device.

[0075] The clamping fixture 300 is fixed to the clamping mechanism by locking screws. The clamping fixture 300 and the clamping mechanism are positioned by locating pins to ensure that the measured position deviation of the motor 20 after each clamping is less than 0.1mm. The locking screws securely fix the clamping fixture 300 to the clamping mechanism, ensuring that the clamping fixture 300 will not loosen during the testing process. This provides a stable clamping environment and reduces clamping errors. The locating pins ensure the positional accuracy of the motor during each clamping. The design of the locating pins allows the positional deviation of the motor after clamping to be controlled within a very small range (less than 0.1mm), thus guaranteeing high accuracy and high repeatability of the measurement results.

[0076] The locking mechanism is secured using the locking fixture 400. This secures the mechanism, ensuring the reliability of the entire clamping system. It reduces measurement errors or equipment malfunctions caused by insecure clamping, thus improving the reliability and safety of the testing process.

[0077] In one embodiment, according to the comprehensive mechanical precision testing scheme for a precision servo motor assembly line provided by the present invention, when detecting the radial runout of the output shaft 21 of the motor under test and the radial runout of the encoder mounting shaft 22 by the output shaft optical measurement mechanism 600 and the encoder mounting shaft optical measurement mechanism 700 respectively, the following steps are included: The optical measuring mechanism 600 on the output shaft and the optical measuring mechanism 700 on the encoder mounting shaft automatically move to the measurement positions of the output shaft 21 and encoder mounting shaft 22 of the motor under test. This means that the optical measuring mechanisms automatically move to the preset measurement positions via the control mechanism. This step ensures that the measuring instruments can be accurately aligned with the output shaft 21 and encoder mounting shaft 22 of the motor under test 20, reducing human error and improving the accuracy and consistency of the measurements.

[0078] The motor under test 20 is rotated by an open-loop driver, with a rotation speed of nr / min, and the output shaft 21 rotates once every t seconds. The measurement time is set to T seconds, and the data of the motor under test 20 shaft rotating twice is measured. The acquisition frequency is Hz. The open-loop driver controls the rotation speed and time of the motor under test 20 to ensure that the motor rotates according to the preset parameters during the test.

[0079] Determine whether the test result is qualified and save the test data. Among them, if the runout test is qualified, rotate the motor 20 to be tested to the vertical position through the rotating device and save the test data. If it is unqualified, the equipment control system will give an alarm prompt and save the test data. It can be understood that the control mechanism analyzes and judges the collected data in real time according to the preset standard to determine whether the measurement result meets the quality standard. This step ensures that only qualified motors can enter the next test or assembly process. If the runout test is qualified, the motor will be rotated to the vertical position through the rotating device to prepare for the subsequent coaxiality and perpendicularity tests. This step ensures the coherence of the test process. If the runout test is unqualified, the equipment control system will give an alarm prompt to notify the operator to handle it. At the same time, the test data will be saved for subsequent analysis and improvement. Whether it is qualified or unqualified, the test data will be saved for subsequent quality traceability and data analysis.

[0080] In an embodiment, according to a comprehensive mechanical precision detection scheme for a precision servo motor assembly production line provided by the present invention, when respectively detecting the coaxiality between the output shaft 21 of the motor 20 to be tested and the flange side mounting surface 23 and the perpendicularity between the output shaft 21 of the motor 20 to be tested and the flange mounting surface 24 by the perpendicularity and coaxiality measuring mechanism 800, the following steps are included: Lock the perpendicularity and coaxiality measuring mechanism 800 on the output shaft 21 of the motor to be tested by screws. It can be understood that the perpendicularity and coaxiality measuring mechanism 800 is firmly fixed on the output shaft 21 of the motor 20 to be tested by screws, ensuring that the measuring mechanism will not move or loosen during the measurement process, thus ensuring the stability and accuracy of the measurement.

[0081] The driver drives the output shaft 21 of the motor to be tested to rotate clockwise for two circles at a rotation speed of nr / min, then rotate counterclockwise for two circles at a rotation speed of nr / min, and the measurement time is 4T seconds, respectively detecting the coaxiality between the output shaft 21 of the motor to be tested and the flange side mounting surface 23 and the perpendicularity between the output shaft 21 of the motor to be tested and the flange mounting surface 24. It can be understood that the driver open-loop controls the output shaft 21 of the motor to be tested to rotate clockwise and counterclockwise for two circles each. This two-way rotation design can comprehensively evaluate the coaxiality and perpendicularity between the output shaft 21 and the flange, ensuring the comprehensiveness and accuracy of the measurement result. By precisely controlling the rotation speed (nr / min) and the measurement time (4T seconds), the standardization and consistency of the measurement process are ensured. During the rotation of the motor, the measuring mechanism collects data. By rotating clockwise and counterclockwise, the coaxiality and perpendicularity deviations in different directions can be detected, thus providing a more comprehensive measurement result. [[ID=IO]]

[0082] Judge whether the test result is qualified and save the test data. Among them, if the coaxiality and perpendicularity tests are qualified, rotate the motor 20 to be tested to the horizontal position, loosen the clamping mechanism, remove the motor and transfer it to the next assembly process; if not, the equipment control system will give an alarm prompt, rotate the motor 20 to be tested to the horizontal position, loosen the clamping mechanism, remove the motor and take it offline. It can be understood that the control mechanism analyzes and judges the collected data in real time according to the preset standards to determine whether the measurement result meets the quality standards. This step ensures that only qualified motors can enter the next test or assembly process. Saving the test data facilitates subsequent quality traceability and data analysis. The digital data management method improves the transparency and controllability of the production process.

[0083] If the coaxiality and perpendicularity tests are qualified, rotate the motor 20 to be tested to the horizontal position, loosen the clamping mechanism, remove the motor and transfer it to the next assembly process. This ensures the continuity of the test process and improves production efficiency. If the coaxiality and perpendicularity tests are unqualified, the equipment control system will give an alarm prompt to notify the operator for handling. At the same time, rotate the motor 20 to be tested to the horizontal position, loosen the clamping mechanism, remove the motor and take it offline. Whether it is qualified or unqualified, the test data will be saved for subsequent analysis and improvement.

[0084] In a specific embodiment, the device fixes the motor 20 to be tested through the clamping mechanism 200 and the clamping tooling 300. The clamping tooling 300 is fixed to the clamping mechanism 200 by four locking screws. The clamping tooling 300 and the clamping mechanism 200 are positioned by a positioning pin. The clamping tooling 300 can position the motor 20 to be tested to ensure that the deviation of the measured position of the motor after each placement and clamping is less than 0.1 mm. Then, lock the mechanism through the locking tooling 400 to avoid possible jitter of the clamping mechanism 200; the first feed shaft 610 and the second feed shaft 710 respectively perform precise position control on the optical measuring instrument for the measured position, connect the power line of the motor 20 to be tested, and click the start button of the equipment control system.

[0085] The output shaft optical measuring instrument 630 and the encoder mounting shaft optical measuring instrument 730 automatically run to the measuring positions of the output shaft 21 of the motor to be tested and the encoder mounting shaft 22. The driver controls the motor to rotate in open loop, with a rotation speed of 10 r / min. The output shaft 21 rotates one circle in 6 s. The measurement time is set to 12 seconds. The optical measuring instrument measures the data of the motor shaft rotating two circles. The acquisition frequency of the optical measuring instrument is 16000 hz. After the measurement is completed, the motor automatically stops rotating and is powered off. The equipment control system judges whether the test data is qualified according to the formulated data standard. If it is qualified, the next test will be carried out. If it is unqualified, an alarm prompt will be given. After the measurement is qualified, the output shaft optical measuring instrument 630 and the encoder mounting shaft optical measuring instrument 730 respectively move automatically to the safe positions on both sides, and the motor 20 to be tested automatically rotates to the vertical position as Figure 3 As shown, if the measurement fails, loosen the clamping mechanism and remove the motor 20 to be tested.

[0086] After the above-mentioned inspection processes are completed, once the output shaft optical measuring instrument 630 and the encoder mounting shaft optical measuring instrument 730 have moved to a safe position, the motor will automatically rotate to a vertical position. Figure 3 As shown; the perpendicularity and coaxiality measuring fixture 810 is locked to the output shaft 21 of the motor under test with screws. The driver drives the output shaft 21 of the motor under test to rotate clockwise two revolutions at a speed of 10 r / min, and then counterclockwise two revolutions at a speed of 10 r / min. The measurement time is 24 seconds. After the measurement is completed, the motor automatically stops rotating and the power is cut off. The equipment control system judges whether the test data is qualified according to the established data standards. If it is qualified, the motor under test 20 is rotated to the lateral position as shown. Figure 2 As shown, the clamping mechanism 200 releases, the motor is removed and transferred to the next assembly process. If the test data is unqualified, the equipment control system will issue an alarm and rotate the motor 20 under test to a lateral position. Figure 2 As shown, the clamping mechanism 200 is released, the motor is removed and unwired.

[0087] For cross-regional production transfer, this testing device can input the measurement positions of different models of servo motors into the equipment control system. When changing to a different model of motor, the clamping fixture 300 and the perpendicularity and coaxiality measuring fixture 810 can be quickly replaced using four locking screws. The position files of the corresponding different models of motors 20 can be directly retrieved from the equipment control system, making it suitable for rapid production transfer. The transfer time is 8 minutes.

[0088] Finally, 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 foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A comprehensive mechanical precision testing device for a precision servo motor assembly production line, characterized in that, include: Base; A clamping mechanism is used to clamp and fix the motor to be tested; A rotating mechanism is connected between the base and the clamping mechanism, and the rotating mechanism is used to drive the motor under test held by the clamping mechanism to rotate relative to the base; An output shaft optical measurement mechanism is movably connected to the base and located on one side of the clamping mechanism. The output shaft optical measurement mechanism is used to detect the radial runout of the output shaft of the motor under test. An encoder mounting shaft optical measurement mechanism is movably connected to the base and located on the other side of the clamping mechanism relative to the output shaft optical measurement mechanism. The encoder mounting shaft optical measurement mechanism is used to detect the radial runout of the encoder mounting shaft of the motor under test. A perpendicularity and coaxiality measuring mechanism is detachably connected to the output shaft of the motor under test. The perpendicularity and coaxiality measuring mechanism is used to detect the coaxiality between the output shaft of the motor under test and the mounting surface of the flange side of the motor under test, as well as the perpendicularity between the output shaft of the motor under test and the mounting surface of the flange of the motor under test. The control mechanism is electrically connected to the motor under test, the output shaft optical measurement mechanism, the encoder mounting shaft optical measurement mechanism, and the perpendicularity and coaxiality measurement mechanism.

2. The comprehensive mechanical precision testing device for a precision servo motor assembly line according to claim 1, characterized in that, The base includes a first mounting part and a second mounting part, which extend along a first direction and a second direction respectively. The first direction and the second direction are perpendicular to each other. The clamping mechanism is mounted on the first mounting part through the rotating mechanism and is located in the middle of the second mounting part. The output shaft optical measurement mechanism is mounted on one end of the second mounting part along the second direction, and the encoder mounting shaft optical measurement mechanism is mounted on the other end of the second mounting part along the second direction.

3. The comprehensive mechanical precision testing device for a precision servo motor assembly line according to claim 1, characterized in that, It also includes a clamping fixture and a locking fixture. The clamping fixture has a motor fixing position formed on it. The clamping fixture is detachably connected to the clamping mechanism. The clamping fixture is used to position and clamp the motor under test. The locking fixture is connected to the clamping mechanism and is used to lock the clamping mechanism that clamps the motor under test.

4. The comprehensive mechanical precision testing device for a precision servo motor assembly line according to claim 1, characterized in that, The output shaft optical measurement mechanism includes a first feed shaft, an output shaft optical measurement fixture, and an output shaft optical measuring instrument. The first feed shaft is movably mounted on the base along a second direction. The output shaft optical measurement fixture is fixedly connected to the first feed shaft. The output shaft optical measuring instrument is mounted on the output shaft optical measurement fixture. The first feed shaft drives the output shaft optical measuring instrument to reciprocate in the second direction, moving closer to or further away from the clamping mechanism.

5. The comprehensive mechanical precision testing device for a precision servo motor assembly line according to claim 1, characterized in that, The encoder mounting shaft optical measurement mechanism includes a second feed shaft, an encoder mounting position optical measurement fixture, and an encoder mounting shaft optical measuring instrument. The second feed shaft is movably mounted on the base along a second direction. The encoder mounting position optical measurement fixture is fixedly connected to the second feed shaft. The encoder mounting shaft optical measuring instrument is mounted on the encoder mounting position optical measurement fixture. The second feed shaft drives the encoder mounting shaft optical measuring instrument to reciprocate in the second direction, moving closer to or away from the clamping mechanism.

6. The comprehensive mechanical precision testing device for a precision servo motor assembly line according to claim 1, characterized in that, The perpendicularity and coaxiality measuring mechanism includes a perpendicularity and coaxiality measuring fixture, a coaxiality optical measuring instrument, and a perpendicularity optical measuring instrument. Therefore, the coaxiality measuring fixture includes two first connecting arms and a second connecting arm arranged at an angle to each other. The coaxiality optical measuring instrument and the perpendicularity optical measuring instrument are respectively connected to the ends of the first connecting arm and the second connecting arm. The measuring centers of the coaxiality optical measuring instrument and the perpendicularity optical measuring instrument are arranged perpendicularly to each other.

7. A comprehensive mechanical precision testing method for a precision servo motor assembly line, applied to the comprehensive mechanical precision testing device for the precision servo motor assembly line as described in any one of claims 1 to 6, characterized in that, The detection method includes the following steps: The clamping mechanism clamps, positions, and locks the motor under test, and keeps the motor under test in a horizontal position. Connect the motor to be tested electrically and start the motor; The radial runout of the output shaft of the motor under test and the radial runout of the encoder mounting shaft are detected by the output shaft optical measurement mechanism and the encoder mounting shaft optical measurement mechanism respectively, and the pass rate is determined. The detection data is then saved. The motor under test is rotated to a vertical position using a rotating device; The coaxiality of the output shaft of the motor under test and the perpendicularity of the output shaft of the motor under test to the flange mounting surface are measured by the perpendicularity and coaxiality measuring mechanism, respectively, to determine whether they are qualified, and the test data are saved.

8. The comprehensive mechanical precision testing method for a precision servo motor assembly line according to claim 7, characterized in that, The steps for clamping the motor to be tested include: The motor to be tested is clamped and fixed by a clamping fixture; The clamping fixture is fixed to the clamping mechanism by locking screws. The clamping fixture and the clamping mechanism are positioned by positioning pins to ensure that the measured position deviation of the motor under test after each clamping is less than 0.1mm. The locking mechanism is locked using a locking fixture.

9. The comprehensive mechanical precision testing method for a precision servo motor assembly line according to claim 7, characterized in that, When detecting the radial runout of the output shaft of the motor under test and the radial runout of the encoder mounting shaft using the output shaft optical measurement mechanism and the encoder mounting shaft optical measurement mechanism respectively, the following steps are included: The output shaft optical measurement mechanism and the encoder mounting shaft optical measurement mechanism are controlled to move automatically to the measurement positions of the output shaft of the motor under test and the encoder mounting shaft; The motor under test is rotated by an open-loop driver, with a rotation speed of nr / min, one rotation of the output shaft in t seconds, a measurement time of T seconds, and data of two rotations of the motor shaft under test are measured. The acquisition frequency is Hz. The system determines whether the test results are qualified and saves the test data. If the runout test is qualified, the motor under test is rotated to a vertical position using a rotating device, and the test data is saved. If the test is unqualified, the equipment control system issues an alarm and saves the test data.

10. The comprehensive mechanical precision testing method for a precision servo motor assembly line according to claim 7, characterized in that, When measuring the coaxiality of the output shaft of the motor under test and the perpendicularity of the output shaft of the motor under test to the flange mounting surface using perpendicularity and coaxiality measuring mechanisms, the following steps are included: The perpendicularity and coaxiality measuring mechanism is locked onto the output shaft of the motor under test using screws; The driver uses an open-loop drive to rotate the output shaft of the motor under test clockwise two revolutions at a speed of nr / min, and then counterclockwise two revolutions at a speed of nr / min. The measurement time is 4T seconds. The coaxiality between the output shaft of the motor under test and the mounting surface on the side of the flange and the perpendicularity between the output shaft of the motor under test and the mounting surface of the flange are measured respectively. Determine whether the test results are qualified and save the test data; if the coaxiality and perpendicularity are qualified, rotate the motor under test to the lateral position, release the clamping mechanism, remove the motor and pass it to the next assembly process; if they are not qualified, the equipment control system will alarm, rotate the motor under test to the lateral position, release the clamping mechanism, remove the motor and remove it from the line.

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