A photoelectric encoder disc non-uniformity error detection device

Abstract

The application discloses a photoelectric encoder code disc non-uniform error detection device, which comprises a machine body, a rotating table, a driving assembly, a abutting assembly and a linkage execution assembly, the top of the machine body is provided with an industrial camera for collecting code disc images, the driving assembly is arranged in the inner side of the rotating table and is in transmission connection with an external motor, the abutting assembly is in linkage with the driving assembly and is radially telescopic along the rotating table, the linkage execution assembly is movably arranged in the rotating table and is matched with the abutting assembly and the driving assembly, in the application, the code disc is placed on the rotating table, and the locking and constraint of the code disc and the rotation driving of the rotating table are sequentially executed by the same driving output end, so that the full-automatic control of reliable positioning of the code disc before image collection and accurate indexing of the code disc at a preset angle during the collection process is realized, and the time-sharing driving mode not only saves the tedious operation of manually adjusting the angle of the code disc or re-clamping the code disc, but also eliminates the positioning deviation and repetitive error caused by manual intervention.

Description

Technical Field

[0001] This invention belongs to the field of error detection technology, specifically relating to a device for detecting uneven error of a photoelectric encoder code disk. Background Technology

[0002] During the manufacturing process of the code disk, deviations in the position of the engraving lines may occur due to factors such as photolithography precision, material uniformity, or eccentricity. In order to find the indexing deviations generated during the manufacturing process and judge the quality of the code disk, an error detection device is used to measure whether the engraving lines at various positions on the code disk are uniform and whether the spacing is consistent. Existing detection devices generally use photoelectric conversion to obtain the electrical signal of the encoder track at a constant speed, and then process the electrical signal, which is a large workload. Therefore, some existing technologies use image calculation to process the signal and reduce the workload.

[0003] For example, Chinese patent CN207147417U discloses a photoelectric encoder code disk unevenness error detection device, including a base, a worktable, magnetic strips, a first light-blocking plate, a second light-blocking plate, a code disk, LED lights, a column support, a crossbar, an industrial digital camera, and a PC. The worktable is set in the middle of the top surface of the base, and magnetic strips are glued to the sides of the worktable. The first light-blocking plate is set on the side of the magnetic strips, and the second light-blocking plate is connected to the side of the first light-blocking plate. The code disk is set at the top of the worktable, and LED lights are connected to the top of the metal flexible tube. The crossbar is connected to the other side of the sleeve. One end of the second screw is connected to the industrial digital camera, and the other end of the data cable is connected to the PC. The unevenness error of the code disk is calculated by the black-and-white ratio of adjacent engraving lines based on the local code track image. The workload is small and the efficiency is high. The light-blocking plate prevents external interference, and the LED lights provide suitable illumination, resulting in clearer imaging. The crossbar and sleeve facilitate the adjustment of the position of the industrial digital camera.

[0004] This application overcomes the problems of high workload and low efficiency of traditional photoelectric conversion methods by acquiring partial code track images with an industrial digital camera and calculating the black-and-white ratio of adjacent lines. However, in this device, the code disk is only placed on the worktable surface without a dedicated rotation and positioning mechanism. When it is necessary to acquire code track images from different angles of the code disk to comprehensively evaluate the uniformity of the lines, the operator needs to manually adjust the angle of the code disk or move the position of the industrial digital camera. It is difficult to guarantee the repeatability of positioning accuracy for each adjustment. Moreover, when batch testing multiple code disks, the operation is cumbersome and inefficient. In addition, during the adjustment process, the code disk is prone to displacement or tilting, which directly affects the clarity of the image and the consistency of data acquisition. Even if a single rotary table is used, it is impossible to achieve the time-sharing control function of first reliably fixing the code disk with the same drive source and then driving the rotary table to rotate the code disk. This means that the fixing and rotation actions need to rely on manual intervention or additional drive mechanisms, which not only increases the complexity of the device but also significantly limits the automation of the testing process, making it difficult to meet the requirements of efficient and accurate batch testing.

[0005] Therefore, it is necessary to provide a device for detecting uneven error of the code disk of an optical encoder to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a photoelectric encoder code disk non-uniformity error detection device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a photoelectric encoder code disk unevenness error detection device, comprising a body, a rotating table, a drive assembly, a clamping assembly, and a linkage execution assembly, wherein an industrial camera for acquiring code disk images is mounted on the top of the body. The drive assembly is installed inside the rotating platform and connected to an external motor. The clamping assembly is linked to the drive assembly and is radially extendable along the rotating platform. The linkage execution assembly is movably installed inside the rotating platform and cooperates with the clamping assembly and the drive assembly respectively. The clamping assembly extends to clamp against the inner wall of the center hole of the code disk to limit the code disk. During the extension of the clamping assembly, it can drive the linkage execution assembly to move. After the linkage execution assembly moves, it can engage with the drive assembly, so that the rotating platform and the drive assembly rotate synchronously to cooperate with the industrial camera to complete the full circumferential image acquisition of the code disk.

[0008] As a preferred technical solution of the present invention, the rotating platform includes an integrally formed base and a sleeve rod. The sleeve rod is located at the center of the top surface of the base. The base and the sleeve rod are both hollow and interconnected. The clamping component is housed in the hollow area of ​​the base. The side wall of the sleeve rod has a slot for the clamping component to pass through.

[0009] As a preferred technical solution of the present invention, the drive assembly includes an output shaft and a screw that are coaxially fixed. The output shaft is vertically inserted into the hollow area of ​​the rotating table, and its bottom end is connected to an external motor. The screw is located inside the sleeve and is threadedly engaged with the clamping assembly. A slot is provided on the side wall of the output shaft. After the linkage execution assembly is activated, it can be engaged with the output shaft by being inserted into the slot.

[0010] As a preferred technical solution of the present invention, the clamping components are arranged in multiple sets at equal angles along the circumference of the screw. Each set of clamping components is linked to the screw thread of the driving component and extends and retracts radially along the rotating table in sync with the rotation of the screw. The extension end of the clamping component can press against the linkage execution component and drive it to generate linkage action during the extension process. The clamping assembly includes a threaded ring threaded onto a screw and a clamping block horizontally slidably disposed in a slot. A connecting rod is rotatably connected between the clamping block and the threaded ring.

[0011] As a preferred technical solution of the present invention, the base platform is provided with a vertical groove and a horizontal groove. The linkage execution component includes a lower pressure plate that is vertically movable in the vertical groove and a horizontal execution component that is horizontally movable in the horizontal groove. The lower pressure plate abuts against the bottom of the connecting rod, and the horizontal execution component cooperates with the lower pressure plate and the output shaft of the drive component respectively.

[0012] As a preferred technical solution of the present invention, a telescopic spring is provided at the bottom end of the lower pressure plate, a limiting rod is fixedly provided on the inner wall of the vertical groove, and a limiting groove corresponding to the limiting rod is opened at the top of the lower pressure plate. The telescopic spring drives the lower pressure plate, which is pressed down and moved down, to vertically reset.

[0013] As a preferred technical solution of the present invention, the lower pressure plate has a pushing groove at one end facing the horizontal actuator. The pushing groove is an inclined surface. The end of the horizontal actuator facing the pushing groove is an inclined structure adapted to the inclined surface. When the lower pressure plate moves vertically downward under pressure, the vertical force can be converted into horizontal force by the cooperation between the inclined surface of the pushing groove and the end of the horizontal actuator, and the horizontal actuator can be pushed to extend along the horizontal groove towards the output shaft.

[0014] As a preferred technical solution of the present invention, the horizontal actuator includes a crossbar that abuts against the end of the lower pressure plate. A plug plate is provided at one end of the crossbar facing the output shaft. An adjusting spring is provided between the plug plate and the crossbar. The adjusting spring can push the plug plate to move closer to the output shaft, so that the plug plate fits into the slot of the output shaft, thereby realizing the engagement between the horizontal actuator and the drive assembly.

[0015] As a preferred technical solution of the present invention, a horizontal groove is provided on the crossbar, a tension spring is provided in the horizontal groove, and a limiting rod is also installed in the horizontal groove. One end of the tension spring is fixed to the limiting rod, and the other end is fixed to the inner wall of the horizontal groove. When the crossbar extends along the horizontal groove, it can stretch the tension spring. The rebound force of the tension spring can drive the horizontal actuator to return to horizontal reset and separate the insert plate from the slot of the output shaft.

[0016] As a preferred technical solution of the present invention, when the external motor drives the drive component to reverse, it can drive the clamping component to retract radially along the rotating table and release the clamping limit on the code disk. At the same time, the clamping component releases the pressure on the linkage execution component. The linkage execution component resets under the elastic force of its own reset structure and releases the engagement with the drive component, so that the rotating table and the drive component are de-linked.

[0017] Compared with the prior art, the beneficial effects of the present invention are: In this invention, by placing the code disk on a rotating platform and sequentially executing the locking constraint on the code disk and the rotation drive of the rotating platform from the same drive output terminal, fully automatic control is achieved, ensuring that the code disk is reliably positioned before image acquisition and precisely rotated at a preset angle during acquisition. This time-sharing drive method not only eliminates the tedious operation of manually adjusting the code disk angle or re-clamping the code disk, thus eliminating positioning deviations and repeatability errors caused by manual intervention, but also enables the continuous image acquisition of multiple code tracks to be completed efficiently under a single drive logic, significantly improving the consistency of data acquisition and detection efficiency. At the same time, the code disk rotates with the rotating platform while locked, effectively avoiding imaging blurring and data distortion caused by code disk displacement or tilting, ensuring the clarity and stability of the scribe line image acquisition. Furthermore, after the detection is completed, only reverse drive is needed to reset the rotating platform and release the constraint on the code disk, facilitating the quick replacement of the next code disk to be tested, significantly simplifying the operation process during batch detection, and improving the overall automation level and practicality of the detection device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the photoelectric encoder code disk unevenness error detection device. Figure 2 This is a schematic diagram of the photoelectric encoder code disk unevenness error detection device from another perspective. Figure 3 This is a schematic diagram showing the connection between the rotary table and the output shaft; Figure 4 A schematic diagram showing the connection between the clamping component and the output shaft; Figure 5 for Figure 3 Sectional view at AA; Figure 6 for Figure 5 Enlarged view of region A in the middle; Figure 7 This is a schematic diagram showing the connection between the threaded ring and the connecting rod; Figure 8 This is a structural diagram of the linkage execution component; Figure 9 This is a structural diagram of the linkage execution components from another perspective.

[0019] In the picture: 1. Machine body; 101. Control panel; 102. Industrial camera; 2. Rotating table; 201. Base platform; 202. Sleeve rod; 3. Output shaft; 301. Screw; 4. Clamping assembly; 401. Clamping block; 402. Threaded ring; 403. Connecting rod; 5. Lower pressure plate; 5a. Push groove; 501. Limiting groove; 502. Limiting rod; 503. Telescopic spring; 6. Plug-in assembly; 601. Crossbar; 601a. ​​Cross groove; 602. Insert plate; 603. Limiting rod; 604. Adjusting spring; 605. Tension spring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1

[0022] Please see Figures 1 to 7 This invention provides a photoelectric encoder disk non-uniformity error detection device, mainly used to achieve automatic positioning and fixing before disk detection and precise rotation during the detection process, completing the acquisition of circumferential engraving images of the disk, solving the problems of low disk positioning accuracy, separate driving for rotation and fixing, and low automation in existing detection devices; the error detection device includes a body 1, a rotating stage 2 is rotatably set on the worktable of the body 1, the disk to be tested is placed on the top surface of the rotating stage 2, and an industrial camera 102 is fixedly installed on the top of the body 1 through a support arm or frame structure. The shooting end of the industrial camera 102 is vertically set towards the rotating stage 2, which can sample local engraving images of the disk and transmit the acquired images to the background processing system to analyze the non-uniformity error of the disk engraving. An operation screen 101 is also installed on the side of the body 1 for auxiliary operation.

[0023] Furthermore, refer to Figure 3 The rotating platform 2 includes an integrally formed base 201 and a sleeve 202. The sleeve 202 is fixedly located at the center of the top surface of the base 201. Both the base 201 and the sleeve 202 are hollow structures and interconnected. The sleeve 202 provides support for the code disk, and its outer diameter is adapted to the center hole of the code disk, allowing the code disk to be fitted onto the outside of the sleeve 202 for initial positioning. A drive assembly is inserted through the hollow area of ​​the base 201 and the sleeve 202. (Continuing to refer to...) Figure 4 The drive assembly includes an output shaft 3 and a screw 301 that are coaxially fixed. The output shaft 3 extends vertically, and its bottom end passes through the base 201 and is connected to an external motor for transmission. The external motor provides rotational power to the drive assembly. The screw 301 is located in the hollow area of ​​the sleeve 202 and is arranged coaxially with the sleeve 202.

[0024] Furthermore, refer to Figure 5The sleeve 202 has several sets of slots distributed at equal angles along the circumference on its side wall. A clamping component 4 is horizontally slidably disposed within each slot. The clamping component 4 is threadedly linked to the screw 301 and is housed within the hollow area of ​​the base 201. (Refer to...) Figure 7 Each set of clamping components 4 includes a threaded ring 402, a connecting rod 403, and a clamping block 401. The threaded ring 402 is threadedly sleeved on the outside of the screw 301. The clamping block 401 is slidably embedded in the groove of the sleeve 202. One end of the block can extend out of the groove and abut against the inner wall of the center hole of the encoder disk, and the other end extends into the hollow area of ​​the sleeve 202. One end of the connecting rod 403 is rotatably connected to the threaded ring 402, and the other end is rotatably connected to the extension end of the clamping block 401.

[0025] In the above structure, when the external motor drives the screw 301 to rotate in the forward direction, the threaded ring 402 moves vertically downward along the screw 301. Through the transmission of the connecting rod 403, the clamping block 401 extends radially outward along the slot towards the sleeve 202 until the end of the clamping block 401 tightly abuts against the inner wall of the center hole of the code disk, thereby achieving radial limiting and fixing of the code disk and preventing the code disk from shifting or tilting during rotation.

[0026] Furthermore, refer to Figure 6 A vertical groove and a horizontal groove are provided in the hollow area of ​​the base platform 201. The vertical groove and the horizontal groove are connected and a linkage execution component is movably arranged inside. The linkage execution component includes a lower pressure plate 5 and a horizontal actuator. The lower pressure plate 5 is vertically movably arranged in the vertical groove, and its top surface abuts against the bottom of the connecting rod 403. The horizontal actuator is horizontally movably arranged in the horizontal groove and cooperates with the lower pressure plate 5 and the output shaft 3 respectively.

[0027] Furthermore, refer to Figure 7 The top of the lower pressure plate 5 is provided with a limiting groove 501, and the inner wall of the vertical groove is fixed with a horizontally extending limiting rod 502. The limiting rod 502 slides with the limiting groove 501, which guides and limits the vertical movement of the lower pressure plate 5 and prevents the lower pressure plate 5 from swaying. A telescopic spring 503 is provided between the bottom end of the lower pressure plate 5 and the bottom of the vertical groove. The telescopic spring 503 is always in an elastic support state, providing power for the vertical reset of the lower pressure plate 5.

[0028] In the above structure, when the connecting rod 403 drives the abutment block 401 to extend, the bottom of the connecting rod 403 simultaneously presses against the top surface of the lower pressure plate 5, pushing the lower pressure plate 5 to move downward along the vertical groove, while compressing the telescopic spring 503; the lower pressure plate 5 has a pushing groove 5a at one end facing the horizontal actuator, the inner wall of the pushing groove 5a is an inclined surface, and the end of the horizontal actuator facing the pushing groove 5a is an inclined structure adapted to the inclined surface. When the lower pressure plate 5 moves vertically downward, the vertical downward pressure is converted into a horizontal pushing force by the cooperation of the inclined surface of the pushing groove 5a with the inclined end of the horizontal actuator, pushing the horizontal actuator to extend along the horizontal groove towards the direction close to the output shaft 3.

[0029] Example 2

[0030] Please see Figure 8 and Figure 9 Based on Embodiment 1, in order to further improve the compatibility and stability of the engagement between the horizontal actuator and the drive assembly, and to avoid engagement failure due to misalignment of the slots of the insert plate 602 and the output shaft 3, the horizontal actuator includes a crossbar 601 and an insert plate 602. One end of the crossbar 601 abuts against the push groove 5a of the lower pressure plate 5, and the other end is arranged towards the output shaft 3. The insert plate 602 is located at the end of the crossbar 601 facing the output shaft 3, and an adjusting spring 604 is provided between the insert plate 602 and the crossbar 601. The side wall of the output shaft 3 is correspondingly opened. With a slot provided, when the crossbar 601 moves the insert plate 602 toward the output shaft 3, the adjusting spring 604 pushes the insert plate 602 into the slot of the output shaft 3, realizing the engagement of the horizontal actuator and the drive assembly. At this time, the rotary table 2 forms a linkage with the drive assembly through the linkage actuator. When the external motor drives the output shaft 3 to rotate, it can synchronously drive the rotary table 2 and the code disk fixed on it to rotate together, so that the industrial camera 102 can perform full-circumferential engraving image acquisition of the code disk and complete the comprehensive detection of the unevenness error of the code disk engraving.

[0031] Furthermore, a horizontal groove 601a is provided on the horizontal bar 601, a limiting rod 603 is fixedly provided on the inner wall of the horizontal groove, and a tension spring 605 is provided in the horizontal groove 601a. ​​One end of the tension spring 605 is fixedly connected to the limiting rod 603, and the other end is fixedly connected to the inner wall of the horizontal groove 601a. In the above structure, when the crossbar 601 extends along the horizontal groove, the tension spring 605 is stretched and stores elastic potential energy, providing power for the horizontal reset of the horizontal actuator.

[0032] After the image acquisition of the code disk is completed, the external motor drives the drive assembly to rotate in the opposite direction. The screw 301 rotates in the opposite direction, causing the threaded ring 402 to move vertically upward along the screw 301. Through the transmission of the connecting rod 403, the clamping block 401 retracts radially inward along the slot towards the sleeve rod 202, releasing the clamping limit on the inner wall of the code disk's center hole. At the same time, the connecting rod 403 releases the pressure on the lower pressure plate 5. Under the elastic rebound force of the telescopic spring 503, the lower pressure plate 5 resets upward along the vertical slot, pushing the slot 5a to release the horizontal push on the horizontal actuator. Under the elastic rebound force of the tension spring 605, the crossbar 601 resets along the horizontal slot away from the output shaft 3, causing the insert plate 602 to separate from the slot of the output shaft 3, releasing the linkage between the rotating table 2 and the drive assembly. At this time, the operator can directly remove the code disk that has been tested and replace it with the code disk to be tested for the next test. The operation is convenient and greatly improves the efficiency of batch testing.

[0033] In this embodiment, the mating structure of the insert plate 602 and the adjusting spring 604 has been optimized, so that the insert plate 602 has the functions of elastic buffering and self-adaptive alignment, ensuring that the insert plate 602 can be accurately and stably inserted into the slot of the output shaft 3.

[0034] Furthermore, the end of the crossbar 601 facing the output shaft 3 is provided with a receiving groove (from... Figure 8 and Figure 9 As can be seen from the image, the insert plate 602 is slidably embedded in the receiving groove. One end of the insert plate can extend out of the receiving groove and be arranged toward the slot of the output shaft 3. An adjusting spring 604 is provided between the other end and the bottom of the receiving groove. The two ends of the adjusting spring 604 are fixedly connected to the end of the insert plate 602 and the bottom of the receiving groove, respectively, and are always in an elastic support state, providing a continuous elastic pushing force for the extension of the insert plate 602.

[0035] In the above structure, when the crossbar 601 moves horizontally toward the output shaft 3 under the action of the push groove 5a, if the protruding end of the insert plate 602 is not precisely aligned with the slot of the output shaft 3, the end of the insert plate 602 will first abut against the side wall of the output shaft 3. At this time, the crossbar 601 continues to move toward the output shaft 3, which will compress the adjusting spring 604, causing the insert plate 602 to retract into the receiving groove, thereby achieving elastic buffering and avoiding structural deformation or wear caused by hard collision between the insert plate 602 and the output shaft 3, thus extending the service life of the component. At the same time, the external motor drives the output shaft 3 to rotate continuously. When the slot of the output shaft 3 rotates to the position opposite to the insert plate 602, the insert plate 602 quickly extends under the elastic rebound force of the adjusting spring 604 and precisely engages in the slot, completing the engagement of the horizontal actuator and the drive assembly.

[0036] Furthermore, the end of the insert plate 602 facing the output shaft 3 is designed with a rounded chamfer structure. The radius of curvature of the rounded chamfer is adapted to the radius of curvature of the outer wall of the output shaft 3, which can greatly reduce the contact friction between the insert plate 602 and the side wall of the output shaft 3, making the insert plate 602 slide more smoothly when it abuts against the side wall of the output shaft 3 and avoiding jamming. At the same time, when the slot is aligned, the rounded chamfer can play a guiding role, making it easier for the insert plate 602 to be inserted into the slot, further improving the smoothness and accuracy of the engagement.

[0037] It should be noted that the adjusting spring 604 is a high-strength compression spring, and its elastic coefficient is adapted to the snap-fit ​​requirements of the insert plate 602. After calibration, this elastic coefficient can provide the insert plate 602 with an elastic pushing force of not less than 20N, ensuring that the insert plate 602 will not loosen due to the centrifugal force generated by the rotation of the rotating table 2 after it is snapped into the slot, thus ensuring the stability of the snap-fit. At the same time, it can effectively buffer when the insert plate 602 abuts against the side wall of the output shaft 3. Its maximum compression is controlled within 1 / 3 of its own free length, avoiding plastic deformation of the spring due to excessive compression, and ensuring the cyclic performance and service life of the adjusting spring 604.

[0038] By optimizing the structure of the insertion plate 602 and the adjusting spring 604, the engagement between the horizontal actuator and the drive assembly has the functions of self-adaptive alignment and elastic buffering. This effectively solves the engagement alignment problem caused by processing errors and installation deviations, ensuring that the rotary table 2 and the drive assembly can be stably linked, and guaranteeing the smoothness and accuracy of the code disk rotation. This, in turn, improves the clarity and consistency of the images acquired by the industrial camera 102, making the detection results of uneven error of the code disk engraving more accurate and reliable.

[0039] Although embodiments of the invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A photoelectric encoder code disk unevenness error detection device, comprising a body (1), a rotating table (2), a drive assembly, a clamping assembly (4), and a linkage execution assembly, wherein an industrial camera (102) for acquiring code disk images is mounted on the top of the body (1), characterized in that: The drive component is installed inside the rotating platform (2) and connected to the external motor. The clamping component (4) is linked with the drive component and can extend and retract radially along the rotating platform (2). The linkage execution component is movably installed inside the rotating platform (2) and cooperates with the clamping component (4) and the drive component respectively. The clamping component (4) extends out and clamps against the inner wall of the center hole of the code disk to realize the code disk limit. During the extension of the clamping component (4), it can drive the linkage execution component to move. After the linkage execution component moves, it can engage with the drive component, so that the rotating platform (2) and the drive component rotate synchronously to cooperate with the industrial camera (102) to complete the full circumferential image acquisition of the code disk.

2. The photoelectric encoder code disk non-uniformity error detection device according to claim 1, characterized in that: The rotating platform (2) includes an integrally formed base (201) and sleeve (202). The sleeve (202) is located at the center of the top surface of the base (201). The base (201) and the sleeve (202) are both hollow and interconnected. The clamping component (4) is housed in the hollow area of ​​the base (201). The side wall of the sleeve (202) has a slot for the clamping component (4) to pass through.

3. The photoelectric encoder code disk non-uniformity error detection device according to claim 2, characterized in that: The drive assembly includes an output shaft (3) and a screw (301) coaxially fixed. The output shaft (3) is vertically inserted into the hollow area of ​​the rotating table (2), and its bottom end is connected to an external motor. The screw (301) is located inside the sleeve (202) and is threadedly engaged with the clamping assembly (4). The side wall of the output shaft (3) is provided with a slot. After the linkage execution assembly is activated, it can be inserted into the slot to achieve a snap-fit ​​engagement with the output shaft (3).

4. The photoelectric encoder code disk non-uniformity error detection device according to claim 3, characterized in that: The clamping components (4) are arranged in multiple sets at equal angles along the circumference of the screw (301). Each set of clamping components (4) is threadedly linked with the screw (301) of the drive component and extends and retracts radially along the rotating table (2) in sync with the rotation of the screw (301). The extension end of the clamping component (4) can press against the linkage execution component and drive it to generate linkage action during the extension process. The clamping assembly (4) includes a threaded ring (402) threaded on the screw (301) and a clamping block (401) horizontally slidably disposed in the slot. A connecting rod (403) is rotatably connected between the clamping block (401) and the threaded ring (402).

5. The photoelectric encoder code disk non-uniformity error detection device according to claim 2, characterized in that: The base (201) has a vertical groove and a horizontal groove. The linkage execution component includes a lower pressure plate (5) that is vertically movable in the vertical groove and a horizontal execution component that is horizontally movable in the horizontal groove. The lower pressure plate (5) abuts against the bottom of the connecting rod (403). The horizontal execution component cooperates with the lower pressure plate (5) and the output shaft (3) of the drive component.

6. The photoelectric encoder code disk non-uniformity error detection device according to claim 5, characterized in that: The bottom end of the lower pressure plate (5) is provided with a telescopic spring (503), and a limiting rod (502) is fixedly provided on the inner wall of the vertical groove. The top of the lower pressure plate (5) is provided with a limiting groove (501) that slides with the limiting rod (502). The telescopic spring (503) drives the lower pressure plate (5) that is pressed down to return to its vertical position.

7. The photoelectric encoder code disk non-uniformity error detection device according to claim 6, characterized in that: The lower pressure plate (5) has a push groove (5a) at one end facing the horizontal actuator. The push groove (5a) is an inclined surface. The end of the horizontal actuator facing the push groove (5a) is an inclined structure that is adapted to the inclined surface. When the lower pressure plate (5) is pressed and moves vertically downward, it can cooperate with the end of the horizontal actuator through the inclined surface of the push groove (5a) to convert the vertical power into horizontal power and push the horizontal actuator to extend along the horizontal groove towards the output shaft (3).

8. The photoelectric encoder code disk non-uniformity error detection device according to claim 7, characterized in that: The horizontal actuator includes a crossbar (601) that abuts against the end of the lower pressure plate (5). A plate (602) is provided at one end of the crossbar (601) facing the output shaft (3). An adjusting spring (604) is provided between the plate (602) and the crossbar (601). The adjusting spring (604) can push the plate (602) to move closer to the output shaft (3), so that the plate (602) fits into the slot of the output shaft (3), thereby realizing the engagement of the horizontal actuator with the drive assembly.

9. The photoelectric encoder code disk non-uniformity error detection device according to claim 8, characterized in that: A horizontal groove (601a) is provided on the crossbar (601), and a tension spring (605) is provided in the horizontal groove (601a). A limiting rod (603) is also installed in the horizontal groove. One end of the tension spring (605) is fixed to the limiting rod (603), and the other end is fixed to the inner wall of the horizontal groove (601a). When the crossbar (601) extends along the horizontal groove, it can stretch the tension spring (605). The rebound force of the tension spring (605) can drive the horizontal actuator to return to its horizontal position and separate the insert plate (602) from the slot of the output shaft (3).

10. The photoelectric encoder code disk non-uniformity error detection device according to claim 9, characterized in that: When the external motor drives the drive assembly to reverse, it can drive the clamping assembly (4) to retract radially along the rotating table (2) and release the clamping limit on the code disk. At the same time, the clamping assembly (4) releases the pressure on the linkage execution assembly. The linkage execution assembly resets under the elastic force of its own reset structure and releases the engagement with the drive assembly, so that the rotating table (2) and the drive assembly are de-linked.

Images