Split type magnetic encoder calibration device

Abstract

The invention discloses a split type magnetic encoder calibration device, and belongs to the technical field of encoder calibration equipment. The split type magnetic encoder calibration device comprises a first mounting rack, an encoder fixing plate, a first adapter shaft, a first shaft system positioning structure, a calibration rotation output device and a first coupler. Due to the fact that the first shafting positioning structure is connected to the first top plate, and the first coupling shaft penetrates through the first shafting positioning structure, the first shafting positioning structure can circumferentially support the first coupling shaft so as to eliminate swinging and shaking errors of the first coupling shaft in the rotating process. Therefore, the relatively accurate relative error of the split type magnetic encoder relative to the calibration device is obtained, the relative error is used as an angle error compensation basis, and the precision of the split type magnetic encoder is improved.

Description

Technical Field

[0001] The present application relates to the field of encoder calibration equipment, and in particular to a split-type magnetic encoder calibration device. Background Art

[0002] The split magnetic encoder includes an encoder body mounted on the motor housing and a magnet assembly mounted on the motor shaft. It is used to accurately measure the angular rotation of the shaft structure. It is the core component for realizing product servo control and is widely used in high-tech fields such as photoelectric turrets, photoelectric seekers, and robots. It plays a vital role in modern industry. Compared with resolvers and photoelectric encoders, the split magnetic encoder has the advantages of low structural installation requirements, high temperature resistance, impact resistance, small size and low cost. It has unique advantages in the field of miniaturized photoelectric seekers and photoelectric turrets.

[0003] The split magnetic encoder is mainly composed of a Hall plate and a multi-pole magnet. The Hall device on the Hall plate senses the change of the magnetic field signal of the magnet, converts the magnetic field signal into a voltage signal, and converts the voltage signal into a digital signal through a single-chip microcomputer, thereby calculating the angle value.

[0004] The split magnetic encoder needs to be calibrated before installation and use to ensure its accuracy and reliability. However, the calibration device in the related art is not designed reasonably, and other external errors are introduced during the shaft transmission process, resulting in inaccurate errors, which affects the accuracy of the split magnetic encoder. Summary of the invention

[0005] The embodiment of the present application provides a split-type magnetic encoder calibration device, which can solve the technical problems of large error and inaccurate calibration in the calibration device in the related art. The technical solution is as follows:

[0006] A split magnetic encoder calibration device comprises: a first mounting frame, the first mounting frame comprises a first bottom plate, a first top plate, and a connecting rod connecting the first bottom plate and the first top plate; an encoder fixing plate, fixedly connected to the first top plate, used to fix the split magnetic encoder to be calibrated, the rotating shaft of the split magnetic encoder to be calibrated faces downward; a first adapter shaft, the first adapter shaft has a first connecting end and a second connecting end, the first connecting end is used to connect with the rotating shaft of the split magnetic encoder to be calibrated; a first shaft system positioning structure, connected to the first top plate; the first adapter shaft passes through the first shaft system positioning structure, the first shaft system positioning structure is used to circumferentially support the first adapter shaft; a calibration rotation output device, connected to the first bottom plate, having a first output shaft facing upward; and a first coupling, the first coupling connecting the first output shaft and the second connecting end.

[0007] Optionally, the first shaft system positioning structure includes: a second mounting frame, the second mounting frame having a sunken barrel body and a flange portion located at the upper end of the barrel body and extending outward, the flange portion being connected to the first top plate; and a first bearing seat fixedly connected to the bottom of the barrel body, a first bearing being arranged in the first bearing seat; the first adapter shaft passes through the inner ring of the first bearing and has an interference fit with the inner ring of the first bearing.

[0008] Optionally, the first shaft system positioning structure also includes a second adapter shaft, which is interference fit with the inner ring of the first bearing, and the center of the second adapter shaft has an axial through hole; the lower end of the first adapter shaft is inserted into the upper half of the through hole, and the lower half of the through hole is provided with a third adapter shaft, and the lower end of the third adapter shaft extends out of the through hole, and the lower end of the third adapter shaft is connected to the upper end of the first coupling.

[0009] Optionally, the calibrated rotation output device includes a servo motor, a standard angular displacement sensor and a third mounting bracket; the third mounting bracket includes a second base plate and a second top plate, the second base plate is connected to the first base plate, the second base plate is fixedly connected to the servo motor, and the output shaft of the servo motor faces upward; the second top plate is provided with the standard angular displacement sensor, the output shaft of the servo motor is connected to the rotating shaft of the standard angular displacement sensor through a second coupling, and the first output shaft is connected to the rotating shaft of the standard angular displacement sensor.

[0010] Optionally, it also includes a second shaft system positioning structure; the second shaft system positioning structure includes a second bearing seat fixedly connected to the second top plate, and a second bearing is arranged in the second bearing seat; the first output shaft passes through the inner ring of the second bearing and has an interference fit with the inner ring of the second bearing.

[0011] Optionally, it also includes a horizontal adjustment device, which includes a third base plate, a left-right adjustment sliding platform and a front-back adjustment sliding platform arranged in sequence from bottom to top; the second base plate is fixedly connected to the top of the front-back adjustment sliding platform.

[0012] Optionally, a mounting hole is provided in the middle of the encoder fixing plate; the split magnetic encoder calibration device has a plurality of the encoder fixing plates, and the plurality of encoder fixing plates correspond to the outer shells of the split magnetic encoders to be calibrated of various sizes.

[0013] Optionally, the split-type magnetic encoder calibration device has a plurality of the first adapter shafts, and the first connecting ends of the plurality of the first adapter shafts correspond to the rotating shafts of the split-type magnetic encoders to be calibrated of various sizes.

[0014] Optionally, the upper end of the second adapter shaft has a connecting section protruding upward, a side portion of the connecting section is provided with a screw hole, and a locking screw is provided in the screw hole.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0016] A split magnetic encoder calibration device includes: a first mounting frame, an encoder fixing plate, a first adapter shaft, a first shaft system positioning structure, a calibration rotation output device and a first coupling. When calibrating the split magnetic encoder, first install the calibration rotation output device on the first bottom plate, so that the first output shaft of the calibration rotation output device faces upward. Then fix the split magnetic encoder on the first top plate through the encoder fixing plate, so that the rotation axis of the split magnetic encoder faces downward. Connect the rotation axis of the split magnetic encoder and the first output shaft through the first adapter shaft. Since the first top plate is connected to the first shaft system positioning structure, and the first adapter shaft passes through the first shaft system positioning structure, the first shaft system positioning structure can circumferentially support the first adapter shaft to eliminate the swing and shaking errors of the first adapter shaft during the rotation process, thereby obtaining a relatively accurate relative error between the split magnetic encoder and the calibration device, which can be used as a basis for angle error compensation to improve the accuracy of the split magnetic encoder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a stereoscopic diagram of a split-type magnetic encoder calibration device provided in an embodiment of the present application;

[0019] Figure 2 yes Figure 1 A cross-sectional view of the split magnetic encoder calibration device;

[0020] Figure 3 is a three-dimensional schematic diagram of an encoder fixing plate provided in an embodiment of the present application;

[0021] Figure 4 is a three-dimensional schematic diagram of a second mounting bracket provided in an embodiment of the present application;

[0022] Figure 5 yes Figure 2 A partial enlarged view of the middle A;

[0023] Figure 6 is a three-dimensional exploded view of the first shaft system positioning structure provided in an embodiment of the present application;

[0024] Figure 7 is a three-dimensional schematic diagram of a second transfer shaft provided in an embodiment of the present application;

[0025] Figure 8 yes Figure 2 A partial enlarged view of point B in the middle.

[0026] Description of Reference Numerals

[0027] 1-first mounting frame; 101-first bottom plate; 102-first top plate; 103-connecting rod;

[0028] 2- encoder fixing plate; 201- mounting hole;

[0029] 3-first transfer shaft; 301-first connecting end; 302-second connecting end;

[0030] 4-first shaft system positioning structure; 401-second mounting frame; 4011-barrel body; 4012-flange; 402-first bearing seat; 403-first bearing; 404-second transfer shaft; 4041-through hole; 4042-connecting section; 405-third transfer shaft; outer pressure ring 406 and inner pressure ring 407;

[0031] 5-calibrated rotation output device; 501-first output shaft; 502-servo motor; 503-standard angular displacement sensor; 504-third mounting frame; 5041-second bottom plate; 5042-second top plate;

[0032] 6-first coupling; 7-second coupling;

[0033] 8-second shaft system positioning structure; 801-second bearing seat; 802-second bearing;

[0034] 9-horizontal adjustment device; 901-third bottom plate; 902-left and right adjustment sliding platform; 903-front and rear adjustment sliding platform;

[0035] 10-Split magnetic encoder to be calibrated. DETAILED DESCRIPTION

[0036] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0037] In the present disclosure, unless otherwise stated, directional words such as "upper" and "lower" generally refer to the "upper" and "lower" of the corresponding parts in the use state relative to the direction of gravity, and "inside" and "outside" refer to the "inside" and "outside" relative to the corresponding parts' own contours. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order and importance. In the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements.

[0038] The split magnetic encoder includes an encoder body mounted on the motor housing and a magnet assembly mounted on the motor shaft. It is used to accurately measure the angular rotation of the shaft structure and is a core component for realizing product servo control. The split magnetic encoder is mainly composed of a Hall plate and a multi-pole magnet. The Hall device on the Hall plate senses the change in the magnetic field signal of the magnet, converts the magnetic field signal into a voltage signal, and converts the voltage signal into a digital signal through a single-chip microcomputer to calculate the angle value. The split magnetic encoder needs to be calibrated before installation and use to ensure its accuracy and reliability. However, the calibration device in the related art is not designed reasonably, and other external errors are introduced during the shaft transmission process, resulting in inaccurate errors obtained, thereby affecting the accuracy of the split magnetic encoder.

[0039] Please refer to Figure 1 and Figure 2 An embodiment of the present application provides a split-type magnetic encoder calibration device, which may include: a first mounting frame 1, an encoder fixing plate 2, a first adapter shaft 3, a first shaft system positioning structure 4, a calibration rotation output device 5 and a first coupling 6.

[0040] The first mounting frame 1 includes a first bottom plate 101 , a first top plate 102 , and a connecting rod 103 connecting the first bottom plate 101 and the first top plate 102 to form a reliable mounting basic frame.

[0041] Please refer to Figure 2 and Figure 3 The encoder fixing plate 2 is fixedly connected to the first top plate 102, and is used to fix the split magnetic encoder 10 to be calibrated, and the rotating axis of the split magnetic encoder 10 to be calibrated faces downward; the first adapter shaft 3 has a first connecting end 301 and a second connecting end 302, and the first connecting end 301 is used to connect with the rotating axis of the split magnetic encoder 10 to be calibrated.

[0042] The first shaft system positioning structure 4 is connected to the first top plate 102; the first adapter shaft 3 passes through the first shaft system positioning structure 4, and the first shaft system positioning structure 4 is used to circumferentially support the first adapter shaft 3.

[0043] Please refer to Figure 1 and Figure 2, the calibrated rotation output device 5 is connected to the first base plate 101 , and has an upwardly facing first output shaft 501 ; the first coupling 6 connects the first output shaft 501 and the second connection end 302 .

[0044] In the embodiment of the present application, when the split magnetic encoder 10 to be calibrated is calibrated, the calibration rotary output device 5 is first installed on the first bottom plate 101, so that the first output shaft 501 of the calibration rotary output device 5 faces upward. Then the split magnetic encoder 10 to be calibrated is fixed on the first top plate 102 through the encoder fixing plate 2, so that the rotation axis of the split magnetic encoder 10 to be calibrated faces downward. The rotation axis of the split magnetic encoder 10 to be calibrated is connected to the first output shaft 501 through the first adapter shaft 3.

[0045] Since the first top plate 102 is connected to the first shaft system positioning structure 4, and the first adapter shaft 3 passes through the first shaft system positioning structure 4, the first shaft system positioning structure 4 can circumferentially support the first adapter shaft 3 to eliminate the swing and shaking errors of the first adapter shaft 3 during the rotation process, and the calibration rotation output device 5 can output high-precision rotational motion. Through the split magnetic encoder calibration device of the present application, a relatively accurate relative error between the split magnetic encoder 10 to be calibrated and the calibration rotation output device 5 can be obtained as a basis for angle error compensation, thereby improving the accuracy of the split magnetic encoder.

[0046] The first shaft system positioning structure 4 may be a structure that applies a clamping force to the first adapter shaft 3 from the circumferential direction without affecting the rotation of the first adapter shaft 3. This application does not impose any limitation on this.

[0047] In the examples of this application, please refer to Figure 2 and Figure 5 The first shaft system positioning structure 4 may include: a second mounting frame 401 , a first bearing seat 402 and a first bearing 403 .

[0048] Please refer to Figure 3 The second mounting frame 401 has a downwardly sunken barrel body 4011 and a flange 4012 located at the upper end of the barrel body 4011 and extending outward, and the flange 4012 is connected to the first top plate 102; the first bearing seat 402 is fixedly connected to the bottom of the barrel body 4011, and a first bearing 403 is arranged in the first bearing seat 402. The first transfer shaft 3 passes through the inner ring of the first bearing 403 and has an interference fit with the inner ring of the first bearing 403.

[0049] In this case, since the first adapter shaft 3 passes through the first bearing 403, the first bearing 403 can circumferentially constrain the first adapter shaft 3 and does not restrict the rotation of the first adapter shaft 3, thereby improving the accuracy of the rotating shaft transmitted from the first output shaft 501 to the split magnetic encoder 10 to be calibrated.

[0050] In order to improve the applicability of the split magnetic encoder calibration device, it is possible to calibrate split magnetic encoders of more sizes.

[0051] Please refer to Figure 5 , Figure 6 and Figure 7 The first shaft system positioning structure 4 may further include a second transfer shaft 404, which is installed in the first bearing seat 402 through an outer pressure ring 406 and an inner pressure ring 407. The second transfer shaft 404 is interference fit with the inner ring of the first bearing 403, and the center of the second transfer shaft 404 has an axial through hole 4041; the lower end of the first transfer shaft 3 is inserted into the upper half of the through hole 4041, and the lower half of the through hole 4041 is provided with a third transfer shaft 405, and the lower end of the third transfer shaft 405 extends out of the through hole 4041, and the lower end of the third transfer shaft 405 is connected to the upper end of the first coupling 6.

[0052] Since the connection between the shaft and the bearing is usually an interference fit, installing the shaft to the bearing is a time-consuming and laborious task. In the embodiment of the present application, by setting a separate second adapter shaft 404, the second adapter shaft 404 is permanently left in the first bearing 403. When it is necessary to calibrate the split-type magnetic encoder 10 to be calibrated of other sizes, it is only necessary to connect the first adapter shaft 3 of the split-type magnetic encoder 10 to be calibrated with the second adapter shaft 404, eliminating the trouble of removing the first adapter shaft 3 from the first bearing 403, thereby improving the assembly efficiency of the split-type magnetic encoder calibration device. The third adapter shaft 405 can be integrally formed with the second adapter shaft 404. In order to save materials and improve manufacturing efficiency, the third adapter shaft 405 can be processed separately and installed in the through hole 4041 of the second adapter shaft 404.

[0053] The calibration rotation output device 5 is a device for outputting high-precision rotational motion for calibration. In the embodiment of the present application, please refer to Figure 2 The calibration rotation output device 5 includes a servo motor 502 , a standard angular displacement sensor 503 and a third mounting bracket 504 .

[0054] The third mounting frame 504 includes a second bottom plate 5041 and a second top plate 5042 . The second bottom plate 5041 is connected to the first bottom plate 101 . The second bottom plate 5041 is fixedly connected to the servo motor 502 , and the output shaft of the servo motor 502 faces upward.

[0055] Please refer to Figure 2The second top plate 5042 is provided with a standard angular displacement sensor 503, which is a sensor for measuring the outputted motion information of the rotational motion, such as angular velocity and angular displacement, and a high-precision angular displacement sensor can be selected. The output shaft of the servo motor 502 is connected to the rotation shaft of the standard angular displacement sensor 503 through the second coupling 7, and the first output shaft 501 is connected to the rotation shaft of the standard angular displacement sensor 503. In this way, the motion information of the rotational motion outputted by the first output shaft 501 for calibration can be obtained through the standard angular displacement sensor 503, so as to serve as a reference for the error of the obtained split magnetic encoder.

[0056] In order to further improve the accuracy of the rotational motion output by the first output shaft 501 and eliminate the swing and shaking errors of the first output shaft 501, in the embodiment of the present application, please refer to Figure 2 and Figure 8 , the split magnetic encoder calibration device may further include a second shaft system positioning structure 8. The second shaft system positioning structure 8 includes a second bearing seat 801 fixedly connected to the second top plate 5042, and a second bearing 802 is arranged in the second bearing seat 801; the first output shaft 501 passes through the inner ring of the second bearing 802 and has an interference fit with the inner ring of the second bearing 802. In this case, since the first output shaft 501 passes through the second bearing 802, the second bearing 802 can constrain the first output shaft 501 in the circumferential direction and does not limit the rotational movement of the first output shaft 501, thereby improving the accuracy of the rotational movement of the first output shaft 501.

[0057] In the process of calibrating the split magnetic encoder, the first step to be done is to align the first output shaft 501 of the calibration rotary output device 5 with the rotation axis of the split magnetic encoder 10 to be calibrated. In the specific operation process, there can be two ways. The first way is to fix the split magnetic encoder 10 to be calibrated, adjust the calibration rotary output device 5, so that the first output shaft 501 of the calibration rotary output device 5 is aligned with the rotation axis of the split magnetic encoder 10 to be calibrated. The second way is to fix the calibration rotary output device 5, adjust the split magnetic encoder 10 to be calibrated, and align the first output shaft 501 of the calibration rotary output device 5 with the rotation axis of the split magnetic encoder 10 to be calibrated.

[0058] In the embodiment of the present application, taking the first method as an example, please refer to Figure 1 and Figure 2The split magnetic encoder calibration device also includes a horizontal adjustment device 9, which includes a third bottom plate 901, a left-right adjustment slide platform 902, and a front-back adjustment slide platform 903 arranged in sequence from bottom to top; the second bottom plate 5041 is fixedly connected to the top of the front-back adjustment slide platform 903. The left-right adjustment slide platform 902 can adjust the third installation frame in the left-right direction, and the front-back adjustment slide platform 903 can adjust the third installation frame in the front-back direction, so as to achieve the adjustment of the third installation frame at any position in the horizontal plane.

[0059] In the examples of this application, please refer to Figure 3 , the middle of the encoder fixing plate 2 has a mounting hole 201; the split magnetic encoder calibration device has multiple encoder fixing plates 2, and the multiple encoder fixing plates 2 correspond to the shells of the split magnetic encoders 10 to be calibrated of various sizes. Through such a design, the split magnetic encoder calibration device can install and fix the split magnetic encoders 10 to be calibrated of more sizes.

[0060] Similarly, in the embodiments of this application, please refer to Figure 2 The split magnetic encoder calibration device has a plurality of first transfer shafts 3, and the first connection ends 301 of the plurality of first transfer shafts 3 correspond to the rotation shafts of the split magnetic encoders 10 to be calibrated of various sizes. By such a design, the split magnetic encoder calibration device can calibrate the split magnetic encoders 10 to be calibrated of more sizes.

[0061] In the examples of this application, please refer to Figure 7 The upper end of the second transfer shaft 404 has a connection section 4042 protruding upward, and the side of the connection section 4042 is provided with a screw hole, and a locking screw is provided in the screw hole. Through such a design, the second connection end 302 of the first transfer shaft 3 can be reliably connected to the upper end of the second transfer shaft 404. In other embodiments, the second connection end 302 of the first transfer shaft 3 and the upper end of the second transfer shaft 404 can also be connected by other connection methods, and the present disclosure does not limit this.

[0062] The following is a specific implementation step to illustrate the implementation principle of the split magnetic encoder calibration device of the present application: when it is necessary to calibrate the split magnetic encoder 10 to be calibrated, in the first step, the calibration rotation output device 5 is installed on the first bottom plate 101 of the first mounting frame 1 through the horizontal adjustment device 9, wherein the servo motor 502 has been installed in the calibration rotation output device 5, and the output shaft of the servo motor 502 is connected to the standard angular displacement sensor 503 through the second coupling 7, the rotating shaft of the standard angular displacement sensor 503 is fixedly connected to the first output shaft 501, and the first output shaft 501 passes through the second shaft system positioning structure 8, which can eliminate the circumferential swing of the first output shaft 501;

[0063] The second step is to select a suitable first transfer shaft 3, connect the first connection end 301 of the first transfer shaft 3 to the rotating shaft of the split magnetic encoder 10 to be calibrated, connect the second connection end 302 of the first transfer shaft 3 to the upper end of the second transfer shaft 404, and then fix the split magnetic encoder 10 to be calibrated on the first top plate 102 through the encoder fixing plate 2;

[0064] The third step is to adjust the left-right adjustment slide table 902 and the front-back adjustment slide table 903 of the horizontal adjustment device 9 to align the first output shaft 501 with the lower end of the second adapter shaft 404;

[0065] Step 4: Connect the lower ends of the first output shaft 501 and the second adapter shaft 404 through the first coupling 6;

[0066] The fifth step is to start the servo motor 502, record and compare the errors between the split magnetic encoder 10 to be calibrated and the standard angular displacement sensor 503, and tabulate the errors to obtain the average error of the current split magnetic encoder. The average error data is used as the basis for angle error compensation, thereby improving the angle accuracy of the split magnetic encoder.

[0067] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0068] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0069] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A split magnetic encoder calibration device, characterized in that: include: A first mounting frame (1), the first mounting frame (1) comprising a first bottom plate (101), a first top plate (102), and a connecting rod (103) connecting the first bottom plate (101) and the first top plate (102); An encoder fixing plate (2) fixedly connected to the first top plate (102) and used for fixing the split-type magnetic encoder (10) to be calibrated, wherein the rotation axis of the split-type magnetic encoder (10) to be calibrated faces downward; A first adapter shaft (3), the first adapter shaft (3) having a first connection end (301) and a second connection end (302), the first connection end (301) being used to be connected to a rotating shaft of the split-type magnetic encoder (10) to be calibrated; A first shaft system positioning structure (4) connected to the first top plate (102); the first adapter shaft (3) passes through the first shaft system positioning structure (4), and the first shaft system positioning structure (4) is used to provide circumferential support for the first adapter shaft (3); A calibration rotation output device (5) is connected to the first base plate (101) and has an upwardly facing first output shaft (501); and a first coupling (6), wherein the first coupling (6) connects the first output shaft (501) and the second connection end (302).

2. The split magnetic encoder calibration device according to claim 1, characterized in that: The first shaft system positioning structure (4) comprises: A second mounting frame (401), the second mounting frame (401) comprising a downwardly-sunk barrel body (4011) and a flange portion (4012) located at the upper end of the barrel body (4011) and extending outward, the flange portion (4012) being connected to the first top plate (102); and a first bearing seat (402) fixedly connected to the bottom of the barrel body (4011), wherein a first bearing (403) is disposed in the first bearing seat (402); The first adapter shaft (3) passes through the inner ring of the first bearing (403) and is interference fit with the inner ring of the first bearing (403).

3. The split magnetic encoder calibration device according to claim 1, characterized in that: The first shaft system positioning structure (4) further comprises a second adapter shaft (404), the second adapter shaft (404) is interference fit with the inner ring of the first bearing (403), and the center of the second adapter shaft (404) has an axial through hole (4041); The lower end of the first transfer shaft (3) is inserted into the upper half of the through hole (4041), the lower half of the through hole (4041) is provided with a third transfer shaft (405), and the lower end of the third transfer shaft (405) extends out of the through hole (4041), and the lower end of the third transfer shaft (405) is connected to the upper end of the first coupling (6).

4. The split magnetic encoder calibration device according to claim 1, characterized in that: The calibration rotation output device (5) comprises a servo motor (502), a standard angular displacement sensor (503) and a third mounting frame (504); The third mounting frame (504) comprises a second bottom plate (5041) and a second top plate (5042), the second bottom plate (5041) is connected to the first bottom plate (101), the second bottom plate (5041) is fixedly connected to the servo motor (502), and the output shaft of the servo motor (502) faces upward; The second top plate (5042) is provided with the standard angular displacement sensor (503), the output shaft of the servo motor (502) is connected to the rotating shaft of the standard angular displacement sensor (503) via a second coupling (7), and the first output shaft (501) is connected to the rotating shaft of the standard angular displacement sensor (503).

5. The split magnetic encoder calibration device according to claim 4, characterized in that: It also includes a second shaft system positioning structure (8); The second shaft system positioning structure (8) comprises a second bearing seat (801) fixedly connected to the second top plate (5042), and a second bearing (802) is arranged in the second bearing seat (801); The first output shaft (501) passes through the inner ring of the second bearing (802) and is interference fit with the inner ring of the second bearing (802).

6. The split magnetic encoder calibration device according to claim 4 or 5, characterized in that: The split-type magnetic encoder calibration device also includes a horizontal adjustment device (9), and the horizontal adjustment device (9) includes a third bottom plate (901), a left-right adjustment sliding platform (902), and a front-back adjustment sliding platform (903) arranged in sequence from bottom to top; The second bottom plate (5041) is fixedly connected to the top of the front-rear adjustment sliding platform (903).

7. The split magnetic encoder calibration device according to claim 1, characterized in that: The encoder fixing plate (2) has a mounting hole (201) in the middle; The split-type magnetic encoder calibration device comprises a plurality of the encoder fixing plates (2), and the plurality of the encoder fixing plates (2) correspond to the outer shells of the split-type magnetic encoders (10) to be calibrated of various sizes.

8. The split magnetic encoder calibration device according to claim 1, characterized in that: The split-type magnetic encoder calibration device comprises a plurality of the first transfer shafts (3), and the first connection ends (301) of the plurality of the first transfer shafts (3) correspond to the rotation shafts of the split-type magnetic encoders (10) to be calibrated of various sizes.

9. The split magnetic encoder calibration device according to claim 3, characterized in that: The upper end of the second transfer shaft (404) is provided with a connecting section (4042) protruding upwards, and a screw hole is provided on the side of the connecting section (4042), and a locking screw is provided in the screw hole.

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