An encoder test turntable

Abstract

The utility model relates to an encoder test rotary table, and the encoder test rotary table includes support frame, and the top of support frame is equipped with first encoder stator mounting disc, and first encoder stator mounting disc is equipped with the first sliding block of radial sliding, and first encoder stator mounting disc can select and install second encoder stator mounting disc, and second encoder stator mounting disc is equipped with the second sliding block of radial sliding, and first sliding block or second sliding block is used for installing the stator of the encoder of measurement, the middle part of support frame is equipped with the pivot, and the top of pivot is equipped with the positioning connecting portion for installing the encoder rotor mounting disc, and the coaxial assembly of benchmark encoder assembly is equipped on the pivot. Through the finish machining of the matching part, it is guaranteed that the encoder stator mounting disc, rotor mounting disc simple installation realize coaxial, and it is not necessary to fussy debugging. Through the design of multiple specifications of encoder stator mounting disc, rotor mounting disc, can according to the need of the size of the encoder of measurement select and use, and the suitability is better.

Description

Technical Field

[0001] This utility model relates to the field of encoder testing technology, and specifically to an encoder testing turntable. Background Technology

[0002] Encoders, as key sensors for precision measurement of angular displacement, are widely used in industrial automation, robotics, CNC machine tools, and aerospace. Accurate testing of their performance parameters (such as angular measurement error, resolution, and dynamic response) is crucial, directly impacting the accuracy and reliability of the entire system. Existing encoder test tables mostly employ fixed mounting structures and are designed for specific encoder models. Testing different encoder models requires frequent fixture changes or adjustments and recalibration of coaxiality, resulting in complex and time-consuming procedures. Utility Model Content

[0003] The purpose of this invention is to provide an encoder test turntable that can be adapted to the installation of several different models of encoders under test.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An encoder testing turntable includes a support frame. A first encoder stator mounting plate is located at the top of the support frame. The first encoder stator mounting plate has a radially sliding first slider. The first encoder stator mounting plate can optionally mount a second encoder stator mounting plate, which also has a radially sliding second slider. The first or second slider is used to mount the stator of the encoder under test. A drive assembly, including a motor and a rotating shaft, is located in the middle of the support frame. The rotating shaft is vertically oriented and driven by the motor. A positioning connection portion is located at the top of the rotating shaft for mounting an encoder rotor mounting plate. The encoder rotor mounting plate has several connection holes for mounting the rotor of the encoder under test. The encoder rotor mounting plate is coaxially arranged with either the first or second encoder stator mounting plate. A reference encoder assembly is coaxially mounted on the rotating shaft.

[0005] Furthermore, the encoder rotor mounting disk includes a first encoder rotor mounting disk, a second encoder rotor mounting disk, a third encoder rotor mounting disk, a fourth encoder rotor mounting disk, and a fifth encoder rotor mounting disk with successively decreasing outer diameters.

[0006] Furthermore, the stator of the motor is fixed to the housing, which is connected to the lower side of the first encoder stator mounting plate.

[0007] Furthermore, the support frame includes a base and a column, the first encoder stator mounting plate is fixed to the upper end of the column, and the upper and lower ends of the rotating shaft are respectively assembled with the housing and the base through bearings.

[0008] Furthermore, there is a gap between the lower end of the housing and the base. The reference encoder assembly includes a fixed disk, a reference encoder, and a probe. The fixed disk is sleeved on the rotating shaft and is located in the gap. The reference encoder is located on the outer edge of the fixed disk. The probe is mounted on the support frame and is set correspondingly to the reference encoder.

[0009] Furthermore, the fixed plate is provided with a light barrier, and the base is provided with a photoelectric switch that works in conjunction with the light barrier.

[0010] Furthermore, the rotating shaft includes a main body, and a positioning connection part is provided protruding upward from the main body, with a threaded hole at the center of the positioning connection part.

[0011] Furthermore, both the first encoder stator mounting plate and the second encoder stator mounting plate have through holes running vertically through their centers. The first encoder stator mounting plate and the second encoder stator mounting plate have a spoke-like structure, including an inner ring, an outer ring, and spokes located between the inner ring and the outer ring. The spokes are provided with grooves that cooperate with the slider, and the bottom of the grooves is provided with bolt holes spaced apart along the length of the grooves.

[0012] Furthermore, both the first encoder rotor mounting plate and the second encoder rotor mounting plate are provided with several sets of connection holes, with each set of connection holes distributed at intervals in the circumferential direction and the connection holes in the same set arranged at intervals in the radial direction.

[0013] Furthermore, the rotor of the motor is sleeved on the rotating shaft and pressed upward by the fixing disc.

[0014] The beneficial effects of this utility model are: This invention relates to an encoder testing turntable, in which a positioning connection part is provided at the top of the rotating shaft for mounting an encoder rotor mounting plate. The encoder rotor mounting plate mates with the positioning connection part and prevents rotation, ensuring synchronous rotation. After insertion, it is connected by bolts, which not only enables quick coaxial connection and improves convenience but also ensures stability during rotation. This invention designs two encoder stator mounting plates of different sizes, allowing for selection of one to accommodate various common encoder specifications. The encoder rotor mounting plate is coaxially arranged with either the first or second encoder stator mounting plate. Through precision machining of the mating parts, coaxiality is achieved immediately after simple installation of the encoder stator and rotor mounting plates, eliminating the need for cumbersome adjustments.

[0015] Furthermore, by designing encoder rotor mounting plates of various specifications, the appropriate type can be selected based on the size requirements of the encoder under test. Simply changing the rotor mounting plate can meet the installation requirements of different encoders under test, thus improving applicability. Attached Figure Description

[0016] Figure 1This is the front view of the encoder test turntable of this utility model; Figure 2 This is a cross-sectional view of the encoder test turntable of this utility model; Figure 3 This is a top view of the encoder test turntable of this utility model; Figure 4 This is a cross-sectional perspective view of the encoder test turntable of this utility model.

[0017] 1. Support frame; 11. Base; 12. Column; 13. Housing; 2. First encoder stator mounting plate; 21. First slider; 22. Slide groove; 3. Encoder under test; 31. Stator; 32. Rotor; 4. First encoder rotor mounting plate; 5. Second encoder stator mounting plate; 51. Second slider; 61. Second encoder rotor mounting plate; 62. Third encoder rotor mounting plate; 63. Fourth encoder rotor mounting plate; 64. Fifth encoder rotor mounting plate; 71. Shaft; 72. Motor; 73. Stator pressure ring; 74. Bearing; 81. Fixing plate; 82. Reference encoder; 91. Photoelectric switch; 92. Optical barrier. Detailed Implementation The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0018] Embodiments of this utility model: like Figures 1 to 4 As shown, an encoder test turntable includes a support frame 1, an encoder stator mounting plate, an encoder rotor mounting plate, and a reference encoder 82 assembly. This utility model has multiple encoder stator mounting plates and rotor mounting plates. The size of the mounting plate can be selected according to the size of the encoder 3 under test. By combining them, the test turntable can test encoders of various specifications.

[0019] The support frame 1 has a first encoder stator mounting plate 2 on its top (the first and second are defined to distinguish different mounting plates). The support frame 1 includes a base 11 and several columns 12 on the periphery. The first encoder stator mounting plate 2 is fixed to the upper end of each of the columns 12 and is horizontally arranged.

[0020] A drive assembly, including a motor 72 and a rotating shaft 71, is located in the middle of the support frame 1. The rotating shaft 71 is vertically positioned and driven by the motor 72. The stator of the motor 72 is fixed in the housing 13 by a stator clamping ring 73 and then secured with screws. The housing 13 is connected to the lower side of the first encoder stator mounting plate 2. The support frame 1, the first encoder stator mounting plate 2, and the housing 13 form a stable support structure, increasing the stability of the rotary drive mechanism.

[0021] The upper and lower ends of the rotating shaft 71 are respectively assembled with the outer shell 13 and the base 11 via bearings 74. In this embodiment, the two bearings 74 are marked with the same mark.

[0022] The first encoder stator mounting plate 2 is provided with a radially sliding first slider 21, which is used to mount the stator 31 of the encoder 3 under test. The first slider 21 has two bolt holes, which can be used to fix its position by bolts. Alternatively, the stator 31 of the encoder 3 under test can be fixed by clamping bolts or clamping parts. Similarly, the second encoder stator mounting plate 5 is provided with a radially sliding second slider 51, and the outer diameter of the second encoder stator mounting plate 5 is smaller than that of the first encoder stator mounting plate 2.

[0023] Both the first encoder stator mounting plate 2 and the second encoder stator mounting plate 5 have through holes running vertically through their centers. These through holes bypass the top area of ​​the rotating shaft 71, allowing the center of the encoder rotor mounting plate to be inserted and connected to the rotating shaft 71. When installing the stator 31, either the first encoder stator mounting plate 2 or the second encoder stator mounting plate 5 can be used. If the outer diameter of the stator of the encoder 3 under test is large, the second encoder stator mounting plate 5 is not required. For stators with smaller outer diameters, the first encoder stator mounting plate 2 does not need to be disassembled; the second encoder stator mounting plate 5 can be directly connected to the upper side of the first encoder stator mounting plate 2 with bolts, making adjustment convenient. In this case, the stator of the encoder 3 under test is mounted on the second slider 51 of the second encoder stator mounting plate 5. The second slider 51 has the same structure and usage as the first slider 21.

[0024] The first encoder stator mounting plate 2 and the second encoder stator mounting plate 5 have a spoked wheel structure, including an inner ring, an outer ring, and spokes located between the inner and outer rings. The spokes have grooves 22 that mate with a slider. The bottom of the grooves 22 has bolt holes spaced apart along the length of the grooves 22. The slider can move along the grooves 22, thereby changing the connection position of the slider to accommodate stator mounting. This invention designs two encoder stator mounting plates of different sizes, which can be adapted to various common encoder specifications.

[0025] The top of the rotating shaft 71 is provided with a positioning connection part for mounting the encoder rotor mounting plate. The rotating shaft 71 includes a main body, and the positioning connection part protrudes upward from the main body. The center of the positioning connection part has a threaded hole. The encoder rotor mounting plate is inserted into the positioning connection part and can stop rotation to achieve synchronous rotation. After insertion, it is connected by bolts to ensure stability during rotation. The encoder rotor mounting plate is coaxially arranged with the first encoder stator mounting plate 2 or the second encoder stator mounting plate 5. In this embodiment, through precision machining of the mating parts, coaxiality is ensured after the encoder rotor mounting plate is installed, eliminating the need for cumbersome adjustments.

[0026] This utility model designs a variety of encoder rotor mounting disks, defined as the first encoder rotor mounting disk 4, the second encoder rotor mounting disk 61, the third encoder rotor mounting disk 62, the fourth encoder rotor mounting disk 63 and the fifth encoder rotor mounting disk 64, with the outer diameter decreasing sequentially.

[0027] The encoder rotor mounting plate has several connection holes for mounting the rotor 32 of the encoder under test 3; the reference encoder 82 assembly is coaxially mounted on the rotating shaft 71. The first encoder rotor mounting plate 4 is the largest and, to reduce its weight, also adopts a spoked wheel structure. The connection holes of each group are distributed at intervals in the circumferential direction, and the connection holes of each group are arranged sequentially at intervals on the spokes for selection. The outer diameter of the first encoder rotor mounting plate 4 is the second largest, and it does not adopt a spoked wheel structure, but it also has multiple sets of connection holes. The remaining encoder rotor mounting plates are smaller and only have a few connection holes distributed along a circumference, with fewer connection holes.

[0028] The reference encoder 82 assembly includes a fixed disk 81, a reference encoder 82, and a probe. The fixed disk 81 is fitted onto the rotating shaft 71. There is a gap between the lower end of the housing 13 and the base 11, and the fixed disk 81 is located within this gap, ensuring sufficient installation and rotation space for the fixed disk 81. The reference encoder 82 is located on the outer edge of the fixed disk 81, and the probe is mounted on the support frame 1 and correspondingly positioned to the reference encoder 82. The reference encoder 82, also known as a "reference encoder" or "standard encoder," provides a true, accurate, and reliable reference value for the performance of the encoder 3 under test.

[0029] The rotor of motor 72 is sleeved on the rotating shaft 71 and pressed upward by the fixing plate 81. The fixing plate 81 can be connected to the shoulder of the rotating shaft 71 by bolts. In this embodiment, motor 72 adopts the DDSM29 series. Since the principle of motor 72 is relatively mature, only the rotor and stator of motor 72 are shown in the figure.

[0030] The fixed plate 81 is equipped with a light barrier 92, and the base 11 is equipped with a photoelectric switch 91 that works in conjunction with the light barrier 92. The photoelectric switch 91 is a slotted photoelectric switch 91, which provides a real-time detection signal and feeds it back to the controller, so that the rotation speed and angle accuracy of the turntable can be precisely controlled.

[0031] During use, select appropriate stator and rotor mounting plates as needed; for example, select the first encoder stator mounting plate 2 and the first encoder rotor mounting plate 4. Adjust the position of the first slider 21 according to the encoder to be tested, and then connect and fix the stator 31 and rotor 32 of the encoder to be tested 3 with bolts. The reference encoder 82 and the encoder to be tested 3 are mounted on the same high-precision rotating shaft 71 and rotate synchronously; the position or angle values ​​of the two encoders are read simultaneously. The reading of the encoder to be tested 3 is compared with the reading of the reference encoder 82 in real time, and the difference is the error of the encoder to be tested 3.

[0032] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model 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 this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An encoder testing turntable, characterized in that: The device includes a support frame, with a first encoder stator mounting plate at the top. The first encoder stator mounting plate has a first slider that can slide radially. The first encoder stator mounting plate can optionally mount a second encoder stator mounting plate, which has a second slider that can slide radially. The first slider or the second slider is used to mount the stator of the encoder under test. A drive assembly, including a motor and a rotating shaft, is located in the middle of the support frame. The rotating shaft is vertically arranged and driven by the motor. The top of the rotating shaft has a positioning connection part for mounting an encoder rotor mounting plate. The encoder rotor mounting plate has several connection holes for mounting the rotor of the encoder under test. The encoder rotor mounting plate is coaxially arranged with the first encoder stator mounting plate or the second encoder stator mounting plate. A reference encoder assembly is coaxially mounted on the rotating shaft.

2. The encoder test turntable according to claim 1, characterized in that: The encoder rotor mounting disk includes a first encoder rotor mounting disk, a second encoder rotor mounting disk, a third encoder rotor mounting disk, a fourth encoder rotor mounting disk, and a fifth encoder rotor mounting disk, with their outer diameters decreasing sequentially.

3. The encoder test turntable according to claim 1, characterized in that: The stator of the motor is fixed to the housing, which is connected to the lower side of the first encoder stator mounting plate.

4. The encoder test turntable according to claim 3, characterized in that: The support frame includes a base and a column. The first encoder stator mounting plate is fixed to the upper end of the column. The upper and lower ends of the rotating shaft are respectively assembled with the housing and the base through bearings.

5. The encoder test turntable according to claim 4, characterized in that: There is a gap between the lower end of the housing and the base. The reference encoder assembly includes a fixed disk, a reference encoder, and a probe. The fixed disk is sleeved on the rotating shaft and is located in the gap. The reference encoder is located on the outer edge of the fixed disk. The probe is mounted on the support frame and is set in correspondence with the reference encoder.

6. The encoder test turntable according to claim 5, characterized in that: The fixed plate is equipped with a light barrier, and the base is equipped with a photoelectric switch that works in conjunction with the light barrier.

7. The encoder test turntable according to claim 1, characterized in that: The rotating shaft includes a main body, and a positioning connection part is provided protruding upward from the main body. The center of the positioning connection part is provided with a threaded hole.

8. The encoder test turntable according to claim 1, characterized in that: The first encoder stator mounting plate and the second encoder stator mounting plate each have a through hole running vertically through their centers. The first encoder stator mounting plate and the second encoder stator mounting plate have a spoke structure, including an inner ring, an outer ring, and spokes located between the inner ring and the outer ring. The spokes are provided with grooves that cooperate with the slider, and the bottom of the grooves is provided with bolt holes spaced apart along the length of the grooves.

9. The encoder test turntable according to claim 2, characterized in that: Both the first encoder rotor mounting plate and the second encoder rotor mounting plate are provided with several sets of connection holes. The connection holes in each set are distributed at intervals in the circumferential direction, and the connection holes in the same set are arranged at intervals in the radial direction.

10. The encoder test turntable according to claim 5, characterized in that: The rotor of the motor is sleeved on the rotating shaft and pressed upward by the fixing plate.

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