Code disk testing fixture and code disk testing device

Abstract

This utility model discloses a code disk testing fixture and a code disk testing device. The code disk testing fixture includes a support; a placement platform for placing the code disk, on which a first limiting structure and a first positioning structure are provided. The placement platform is rotatably mounted on the support about the central axis of the code disk placed on it. The first limiting structure restricts the rotation of the code disk about its central axis relative to the placement platform, and the first positioning structure restricts the movement of the code disk radially relative to the placement platform; and an optocoupler for testing the code disk is mounted on the support. Thus, a driving device can drive the placement platform and the code disk to rotate about the central axis of the code disk placed on it. Simultaneously, the rotating code disk is detected by the optocoupler, and the detection data is transmitted to a control module. The control module determines whether the code disk is qualified based on preset parameters, greatly saving testing time.

Description

Technical Field

[0001] This utility model relates to the field of code disk detection technology, specifically to a code disk detection fixture and a code disk detection device. Background Technology

[0002] A code disk is a digital encoder used to measure angular displacement. It boasts advantages such as high resolution, high measurement accuracy, and reliable operation, making it one of the most commonly used displacement sensors for measuring axial rotation. As a crucial component in radar systems, the radar's detection accuracy heavily relies on the code disk's manufacturing precision; therefore, a full inspection of the code disk's dimensional accuracy is required upon arrival before assembly and production.

[0003] The commonly used inspection method is to measure the dimensions of each code disk using 2D and 3D measuring equipment. However, since the dimensional accuracy of all teeth on the code disk needs to be measured, and a code disk contains 256 teeth, this conventional inspection method requires a lot of manpower and resources and is inefficient.

[0004] Therefore, improving the detection efficiency and accuracy of code disks is of great significance in the field of code disk detection technology. Utility Model Content

[0005] To address at least one of the aforementioned problems, according to one aspect of the present invention, a code disk detection fixture is provided.

[0006] The code disk testing fixture includes a bracket; a placement stage for placing the code disk, the placement stage being provided with a first limiting structure and a first positioning structure, the placement stage being rotatably mounted on the bracket about the central axis of the code disk placed thereon, the first limiting structure being used to restrict the code disk from rotating about its central axis relative to the placement stage, the first positioning structure being used to restrict the code disk from moving radially relative to the placement stage; and an optocoupler for testing the code disk being mounted on the bracket.

[0007] Therefore, when it is necessary to test the code disk, it is only necessary to place the code disk on the placement platform, and restrict the rotation and radial movement of the code disk by the first limiting mechanism and the first positioning structure; drive the placement platform to rotate around the central axis of the code disk placed on it by the driving device, and at the same time, the rotating code disk is detected by the optocoupler and the detection structure is transmitted to the control module. The control module determines whether the code disk is qualified by the parameters preset by the control module, which greatly saves the testing time.

[0008] In some embodiments, the code disk detection fixture further includes a first moving unit with a limiting function; the optocoupler is mounted on a support via the first moving unit; the first moving unit is configured to drive the optocoupler to move along the central axis of the code disk placed on the placement table to a set position. Thus, when picking up or placing the code disk, the first moving unit can move the optocoupler away from the placement table to facilitate the picking up or placing of the code disk.

[0009] In some embodiments, the first moving unit includes a first moving mechanism and a second limiting structure; the first moving mechanism is mounted on a support and is used to drive the optocoupler to move along the direction of the central axis of the code disk placed on the placement table; the second limiting structure is configured to limit the first moving mechanism from driving the code disk to a minimum distance Lmin from the placement table.

[0010] Since the detection accuracy of the optocoupler can be guaranteed when the optocoupler and the code disk are at a suitable distance, for example, when the optocoupler detects the code disk, the distance between the optocoupler and the code disk is 1.4mm, that is, Lmin is set to 1.4mm. This application sets a first moving mechanism and a second limiting structure so that the first moving mechanism drives the optocoupler to move towards the code disk until the distance between the two is Lmin and it can no longer move. By ensuring that the distance between the optocoupler and the code disk is Lmin, the detection accuracy of the optocoupler on the code disk is guaranteed.

[0011] In some embodiments, based on the first moving unit including a first moving mechanism and a second limiting structure, the code disk detection fixture further includes a first limiting unit. The first limiting unit is disposed on a bracket and configured to restrict the first moving unit from moving the code disk to a maximum distance Lmax from the placement table. Therefore, the maximum distance Lmax can be set to a distance that facilitates the picking and placing of the code disk, thus ensuring the safe handling of the code disk.

[0012] In some embodiments, the first moving mechanism includes a first guide rail and a first slider that are mutually adapted to each other. The first guide rail is arranged along the central axis of the code disk placed on the placement stage and is fixedly mounted relative to the support. The optocoupler is mounted on the first slider. The second limiting structure is a limiting block that restricts the first slider from moving towards the placement stage to a minimum distance Lmin. The limiting block is fixedly mounted relative to the support. Thus, when the first slider drives the optocoupler to a position at the minimum distance Lmin from the placement stage, the limiting block can prevent the first slider from moving further, ensuring that the first slider can drive the optocoupler to the same position from the code disk each time, thereby ensuring the accuracy of the detection.

[0013] In some embodiments, the first limiting unit includes a first magnetic component and a second magnetic component that are magnetically attracted to each other. The first magnetic component is fixedly disposed relative to the first guide rail, and the second magnetic component is fixedly disposed relative to the first slider. Thus, when the first slider moves the optocoupler to the maximum distance Lmax from the placement stage, the first slider and the optocoupler can be suspended by the mutual magnetic attraction between the first and second magnetic components, which frees up the hands for picking up and placing the code disk.

[0014] In some embodiments, the first slider and the limiting block are provided with a first protrusion and a first mating hole that are mutually adapted. The first mating hole is a non-circular hole, and the first protrusion is a non-cylindrical protrusion. Thus, when the first slider drives the optocoupler to move to the minimum distance Lmin from the placement stage, the first slider and the limiting block are adapted through the first protrusion and the first mating hole. Since the first mating hole is a non-circular hole and the first protrusion is a non-cylindrical protrusion, the relative position of the optocoupler on the first slider and the code disk set on the bracket (the limiting block is fixedly set relative to the bracket) through the placement stage can be guaranteed.

[0015] In some embodiments, the code disk testing fixture further includes a light shield; the optical coupler is mounted on a first moving unit via the light shield; the first moving unit is configured to move the optical coupler and the light shield along the central axis of the code disk placed on the placement table to a set position. Because the light shield protects the optical coupler from external light sources, the emitted and received light signals during code disk testing are not interfered with by ambient stray light, thereby improving the accuracy of the fixture testing.

[0016] In some embodiments, the first limiting structure is a recess that is fixedly disposed relative to the placement platform and adapted to the protrusion of the code disk. Thus, when the protrusion of the code disk is adapted to the recess, rotation of the code disk about its central axis relative to the placement platform can be restricted.

[0017] In some embodiments, the first positioning structure includes a first positioning block and a second positioning block fixedly disposed relative to the placement stage. The first and second positioning blocks are configured to abut against the outer diameter of the code disk placed on the placement stage, and at least a portion of the second positioning block is located on the side of the code disk opposite to the first positioning block. Thus, when the code disk is placed between the first and second positioning blocks, radial movement of the code disk relative to the placement stage can be restricted.

[0018] According to one aspect of this utility model, a code disk detection device is provided, which includes the aforementioned code disk detection fixture. Thus, a drive device can drive a placement stage and a code disk to rotate around the central axis of the code disk placed thereon. After detecting the rotating code disk via an optocoupler, the detection data is transmitted to a control module. The control module then determines whether the code disk is qualified based on pre-set parameters, greatly saving detection time.

[0019] In some embodiments, the code disk detection device further includes a drive motor, and a placement stage is rotatably mounted on a support via the drive motor about the central axis of the code disk placed on it. Thus, during code disk detection, the placement stage can be rotated by the drive motor, and detection can be performed simultaneously via an optocoupler, thereby greatly improving detection efficiency.

[0020] In some embodiments, the code disk detection device further includes a control module connected to at least one of the code disk and the drive motor. Thus, the control module can not only control the rotation of the drive motor, but also control the optical coupler to transmit and receive optical signals, and can compare the results of the optical coupler detection with preset parameters to determine whether the code disk is qualified.

[0021] In some embodiments, the code disk detection device further includes a positioning pin and at least two of a first positioning hole, a second positioning hole, and a third positioning hole adapted to the positioning pin. The first positioning hole is fixedly disposed relative to the optocoupler, the second positioning hole is fixedly disposed relative to the placement stage, and the third positioning hole is fixedly disposed relative to and coaxially disposed with the shaft of the drive motor. Thus, the positioning pin ensures that at least two of the first, second, and third positioning holes are adapted to the pin, thereby preventing positional misalignment between the optocoupler and the code disk and ensuring the accuracy of optocoupler detection.

[0022] In some implementations, the drive motor is the same as the motor that drives the code disk in the radar. Since the drive motor that drives the code disk in the code disk detection device is the same as the motor that drives the code disk in the radar, and at least one of the code disk and the drive motor is connected to the control module, code disk detection can be completed without the need for specialized 2D or 3D detection equipment, greatly saving equipment costs.

[0023] In some embodiments, the coaxiality of at least two of the first, second, and third positioning holes is controlled to be between 0.01 mm and 0.08 mm. This allows the positioning pin to pass through the first, second, and third positioning holes simultaneously, ensuring the installation accuracy of the optocoupler relative to the placement stage and the motor, thereby guaranteeing the accuracy of the detection. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the encoder structure;

[0025] Figure 2 This is a schematic diagram of the structure of a code disk detection fixture according to one embodiment of the present invention;

[0026] Figure 3 for Figure 2 The diagram shows a structure of a code disk detection fixture where the code disk and the placement stage are at the minimum distance.

[0027] Figure 4 for Figure 2 The diagram shows a structure of the encoder detection fixture with the encoder disk and the placement stage at their maximum distance.

[0028] Figure 5 This is a schematic diagram of the structure of the placement platform according to one embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the installation cantilever structure according to one embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the limiting block according to one embodiment of the present invention;

[0031] Figure 8 This is a partial structural schematic diagram of the encoder detection fixture of this utility model;

[0032] Figure 9 This is a schematic diagram of the first positioning structure according to an embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of the first positioning structure according to another embodiment of the present invention;

[0034] Figure 11 This is a schematic diagram of the first limiting structure according to an embodiment of the present invention;

[0035] Figure 12 This is a schematic diagram of the structure of the second limiting mechanism according to one embodiment of the present invention;

[0036] Figure 13 This is a schematic diagram of the structure of a code disk detection device according to one embodiment of the present invention;

[0037] Figure 14 for Figure 13 A schematic diagram of the disassembled structure of the encoder detection device shown.

[0038] Figure 15 for Figure 14 A partially enlarged schematic diagram of the encoder detection device shown.

[0039] Reference numerals: 1. First mounting base; 2. First limiting unit; 2a. First magnetic component; 2b. Second magnetic component; 3. Second mounting base; 4. Mounting cantilever; 401. First mating hole; 402. First positioning hole; 5. Light shield; 6. Optical coupler; 7. Placement stage; 701. First positioning block; 702. Second positioning block; 703. Recess; 704. Second positioning hole; 705. Third positioning block; 706. Positioning post; 707. Second protrusion; 8. First top cover; 9. Drive motor; 10. Third mounting base; 11. Chassis top cover; 12. Data transmission cable; 13. Input power cable; 14. Power supply box; 15. Chassis bottom plate; 16. Chassis body; 17. Start switch; 18. Emergency stop switch; 19. Control module; 20. Protective coil; 21. Serial port board; 22. Handle; 23. Mounting base plate; 24. Limit block; 241. First protrusion; 25. Bracket; 26. First slider; 27. First guide rail; 271. Third protrusion; 30. Encoder; 31. Black tooth; 32. White tooth; 33. Protrusion; 40. Positioning pin. Detailed Implementation

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0041] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising" or "including" include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The terminology used herein is generally that commonly used by those skilled in the art; in case of any discrepancy with commonly used terminology, the terminology used herein shall prevail.

[0042] Furthermore, for ease of description, spatial relative terms such as “below,” “under,” “lower,” “above,” and “upper” may be used herein to describe the relationship between one element or component and another (or other) element or component as shown in the figure. In addition to the orientation shown in the figure, spatial relative terms are intended to include different orientations of the device during use or operation. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein can be interpreted accordingly.

[0043] In this article, the term "optical coupler" is also known as an optical isolator or optocoupler. It is a device that uses light as a medium to transmit electrical signals, typically encapsulating a light emitter (infrared light-emitting diode, LED) and a light receiver (photosensitive semiconductor tube) in the same housing. When an electrical signal is applied to the input terminal, the light emitter emits light, and the light receiver receives the light, generating a photocurrent that flows out from the output terminal, thus achieving an "electrical-optical-electrical" conversion.

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0045] Figures 2 to 8 The encoder detection fixture according to the first embodiment of the present invention is shown schematically.

[0046] like Figures 2 to 5 As shown, the code disk detection fixture includes a bracket 25, a placement stage 7, and an optocoupler 6. The placement stage 7 is used to place the code disk 30; the placement stage 7 is rotatably mounted on the bracket 25 about the central axis of the code disk 30 placed thereon; a first positioning block 701 and a second positioning block 702 are integrally formed, machined, or connected to the placement stage 7, the first positioning block 701 and the second positioning block 702 can abut against the outer diameter of the code disk 30 placed on the placement stage 7, and at least part of the second positioning block 702 is located on the side of the code disk 30 away from the first positioning block 701, so as to restrict the code disk 30 from moving radially relative to the placement stage 7; the placement stage 7 is also integrally formed or machined with a recess 703, which can be provided on the first positioning block 701 or the second positioning block 702 as needed, so as to restrict the code disk 30 from rotating about its central axis relative to the placement stage 7; the optocoupler 6 is mounted on the bracket 25 and is used to detect the code disk 30.

[0047] When it is necessary to test the code disk 30, simply place the code disk 30 on the placement platform 7. Figure 1The protrusion 33 of the code disk 30 shown is adapted to the recess 703 to restrict the code disk 30 from rotating relative to the placement platform 7 about its central axis; the first positioning block 701 and the second positioning block 702 restrict the code disk 30 placed between them from moving radially relative to the placement platform 7; the placement platform 7 is driven to rotate about the central axis of the code disk 30 placed on it by a driving device (for example, the placement platform 7 can be driven to rotate relative to the bracket 25 by a drive motor 9), and at the same time, the rotating code disk 30 is detected by the optocoupler 6, and the detection result is transmitted to the control module. The control module determines whether the code disk 30 is qualified by the parameters preset by the control module. The whole detection process takes about 25 seconds; while the prior art uses two-dimensional or three-dimensional detection of the code disk 30, since it is necessary to detect the black teeth 31 and white teeth 32 of the code disk 30, Figure 1 For example, the code disk 30 has a total of 265 black teeth 31 and white teeth 32. Due to the large number of teeth to be detected, it takes about 30 minutes to detect one code disk 30. It can be seen that the code disk detection fixture of this application can greatly save detection time.

[0048] The first positioning block 701 and the second positioning block 702 constitute the first positioning structure of an embodiment of this application.

[0049] As another implementation of the first positioning structure, such as Figure 9 As shown, the first positioning structure is implemented as a third positioning block 705, which is disposed on the outer periphery of the code disk 30. The central angle A formed by the two ends of the third positioning block 705 that contact the outer periphery of the code disk 30 and the center of the code disk 30 is greater than 180°. At least one contact point is also provided between the two ends of the third positioning block 705 that contact the outer periphery of the code disk 30, and the central angle formed by this contact point and any end of the third positioning block 705 that contacts the outer periphery of the code disk 30 and the center of the code disk 30 is less than 180°. For example, the third positioning block 705 can be configured as a "C"-shaped structure with a large arc (central angle greater than 180°). This ensures that when the code disk 30 is placed in the third positioning block 705, it will not move radially relative to the third positioning block 705.

[0050] As another implementation of the first positioning structure, such as Figure 10 As shown, the first positioning structure comprises at least three positioning posts 706, which abut against the outer periphery of the code disk 30, and the maximum central angle A formed between the positioning posts 706 is greater than 180°; simultaneously, at least one positioning post 706 forms a central angle less than 180° with any of the two positioning posts 706 that form the maximum central angle A. Therefore, it can be ensured that when the code disk 30 is placed between the positioning posts 706, it will not move radially relative to the positioning posts 706.

[0051] The recessed portion 703 constitutes the first limiting structure of an embodiment of this application.

[0052] As another implementation of the first limiting structure, such as Figure 11 As shown, the first limiting structure is at least one second protrusion 707 provided on the placement platform 7 and adapted to the black teeth 31 of the code disk 30. When the code disk 30 is placed on the placement platform 7, the black teeth 31 of the code disk 30 are fitted onto the second protrusion 707, thereby preventing the code disk 30 from rotating relative to the placement platform 7 around its central axis.

[0053] In some preferred embodiments, such as Figures 2 to 4 As shown, the code disk detection fixture also includes a first guide rail 27 and a first slider 26 that are mutually adapted to each other. The first guide rail 27 is arranged along the direction of the central axis of the code disk 30 placed on the placement table 7, and the first guide rail 27 is fixedly arranged relative to the bracket 25. The optocoupler 6 is arranged on the first slider 26. When it is necessary to pick up or put down the code disk 30, the first slider 26 can drive the optocoupler 6 to move away from the placement table 7 along the extension direction of the first guide rail 27, so as to pick up or put down the code disk 30; after the code disk 30 is placed on the placement table 7, the first slider 26 can drive the optocoupler 6 to move along the extension direction of the first guide rail 27 towards the side where the placement table 7 is located, so as to detect the code disk 30 through the optocoupler 6. Preferably, the code disk detection fixture further includes a limiting block 24 fixedly disposed relative to the bracket 25. The limiting block 24 can restrict the first slider 26 from moving to the placement stage 7 to a minimum distance Lmin. When the first slider 26 drives the optocoupler 6 to the position at the minimum distance Lmin from the placement stage 7, the limiting block 24 can prevent the first slider 26 from moving further, thereby ensuring that the first slider 26 can drive the optocoupler 6 to the same position at the same distance from the code disk 30 each time, thus ensuring the accuracy of the detection. Preferably, the code disk detection fixture further includes a first magnetic component 2a and a second magnetic component 2b that can magnetically attract each other. The first magnetic component 2a is fixedly disposed relative to the first guide rail 27, and the second magnetic component 2b is fixedly disposed relative to the first slider 26. For example, the first magnetic component 2a can be mounted on the first guide rail 27 through the first mounting base 1; the second magnetic component 2b can be mounted on the first slider 26 through the second mounting base 3. When the first slider 26 drives the optocoupler 6 to move to the maximum distance Lmax from the placement stage 7, the first slider 26 and the optocoupler 6 can be suspended by the mutual magnetic attraction between the first magnetic component 2a and the second magnetic component 2b, which is convenient for freeing up the hands to pick up and put down the code disk 30.

[0054] The first guide rail 27 and the first slider 26 constitute the first moving mechanism of an embodiment of this application. The limiting block 24 constitutes the second limiting structure of an embodiment of this application. The first moving mechanism and the second limiting structure constitute the first moving unit with limiting function of an embodiment of this application. Since the detection accuracy of the optical coupler 6 can be guaranteed when the optical coupler 6 is at a suitable distance from the code disk 30, for example, when the optical coupler 6 detects the code disk 30, the distance between the optical coupler 6 and the code disk 30 is 1.4mm, that is, Lmin is set to 1.4mm, this application sets the first moving mechanism and the second limiting structure so that the first moving mechanism drives the optical coupler 6 to move towards the code disk 30 until the distance between them is Lmin and it can no longer move. By ensuring that the distance between the optical coupler 6 and the code disk 30 is Lmin, the detection accuracy of the optical coupler 6 on the code disk 30 is guaranteed.

[0055] As another embodiment of the first moving mechanism, a screw and nut structure can be adopted. When a mutually compatible screw and nut structure is adopted, the screw is arranged along the direction of the central axis of the encoder 30 placed on the placement platform 7, and the screw is rotatably mounted on the bracket 25 around its central axis. The nut is configured to not rotate relative to the bracket 25 (for example, a stop block that can limit the rotation of the nut is provided on the bracket 25), and the optocoupler 6 is mounted on the nut. The nut is moved by rotating the screw, and the direction of movement of the nut is adjusted by adjusting the rotation direction of the screw; moreover, when the screw is stopped, the nut can stop moving, so that the screw and nut structure can also become a first moving unit with a limiting function in one embodiment of this application.

[0056] As another implementation of the second limiting mechanism, such as Figure 12 As shown, the second limiting mechanism is implemented as a third protrusion 271 integrally formed, processed or connected on the first guide rail 27. The third protrusion 271 can limit the first slider 26 from moving to the placement stage 7 to the minimum distance Lmin. When the first slider 26 drives the optocoupler 6 to move to the position of the minimum distance Lmin from the placement stage 7, the third protrusion 271 can prevent the first slider 26 from moving further.

[0057] As another embodiment of the first moving unit with limiting function, a cylinder or a linear motor can be used. When a cylinder is used, the cylinder body is fixed relative to the bracket 25, the piston rod of the cylinder is set along the direction of the central axis of the encoder 30 placed on the placement platform 7, and the optocoupler 6 is mounted on the piston rod. The stroke of the cylinder limits the movement of the optocoupler 6 to a minimum distance Lmin and a maximum distance Lmax from the placement platform 7. When a linear motor is used, the base of the linear motor is fixed relative to the bracket 25, the drive rod of the linear motor is set along the direction of the central axis of the encoder 30 placed on the placement platform 7, and the optocoupler 6 is mounted on the drive rod of the linear motor. The linear motor can limit the movement of the optocoupler 6 to a minimum distance Lmin and a maximum distance Lmax from the placement platform 7.

[0058] The first magnetic element 2a and the second magnetic element 2b constitute the first limiting unit 2 of an embodiment of this application. For example, the first magnetic element 2a and the second magnetic element 2b may be magnets.

[0059] As another implementation of the first limiting unit 2, the first limiting unit 2 can be implemented as a slot and a buckle respectively installed on the first mounting base 1 and the second mounting base 3. The slot and the buckle are configured such that when the first slider 26 drives the optical coupler 6 to move to the maximum distance Lmax from the placement stage 7, the first slider 26 and the optical coupler 6 can be suspended by engaging the slot and the buckle.

[0060] In some preferred embodiments, such as Figures 2 to 4 As shown, the optocoupler 6 can be mounted on the first slider 26 via the mounting cantilever 4. The mounting cantilever 4 can be fixedly mounted on the first slider 26, and can be integrally formed with the first slider 26 or is part of the first slider 26. Figure 6 and Figure 7 As shown, the mounting cantilever 4 has an integrally formed or machined first mating hole 401; the limiting block 24 has an integrally formed, machined, or connected first protrusion 241 that matches the first mating hole 401; the first mating hole 401 is a non-circular hole, and the first protrusion 241 is a non-cylindrical protrusion. When the first slider 26 drives the optocoupler 6 to move to the minimum distance Lmin from the placement platform 7, the first slider 26 and the limiting block 24 are matched through the first protrusion 241 and the first mating hole 401. Since the first mating hole 401 is a non-circular hole and the first protrusion 241 is a non-cylindrical protrusion, the relative position of the optocoupler 6 on the first slider 26 and the code disk 30 set on the bracket 25 (the limiting block 24 is fixedly set relative to the bracket 25) through the placement platform 7 can be guaranteed.

[0061] In some preferred embodiments, such as Figures 2 to 4 and Figure 8As shown, the code disk detection fixture also includes a light shield 5; an optical coupler 6 is mounted on a first slider 26 via the light shield 5; the light shield 5 is mounted on the side of the mounting cantilever 4 away from the first limiting unit 2, and the optical coupler 6 is mounted on the side of the light shield 5 opposite to the mounting cantilever 4; the first slider 26 is configured to drive the optical coupler 6 and the light shield 5 to move to a set position along the direction of the first guide rail 27; the light shield 5 is configured to prevent the optical coupler 6 from being affected by external light sources. The light shield 5 being configured to prevent the optical coupler 6 from being affected by external light sources can be achieved by: configuring the light shield 5 as a housing with a receiving cavity, the opening of which faces downwards; the optical coupler 6 is mounted at the bottom of the receiving cavity of the light shield 5, so that the sidewall of the light shield 5 can provide light shielding for the optical coupler 6 mounted in the receiving cavity of the light shield 5. Because the light shield 5 prevents the optical coupler 6 from being affected by external light sources, the emitted and received light signals of the optical coupler 6 when detecting the code disk 30 will not be interfered with by ambient stray light, thereby improving the accuracy of the fixture detection. Preferably, when a limiting block 24 is also provided, the limiting block 24 can ensure that the distance D from the bottom of the light shield 5 to the top of the placement stage 7 is a constant value, for example, D is 5mm, thereby ensuring that the distance between the optocoupler 6 and the code disk 30 on the placement stage 7 is 1.4mm. Preferably, in order to further avoid the optocoupler 6 being affected by external light sources, a light shield 5 made of anti-glare material is selected, or an anti-glare layer is provided on the inner wall of the receiving cavity of the light shield 5. The anti-glare layer can be achieved by coating anti-glare material or pasting anti-glare film.

[0062] Figures 13 to 15 The encoder detection device according to one embodiment of this application is shown schematically.

[0063] like Figure 13 and Figure 14 As shown, the code disk detection device includes the aforementioned code disk detection fixture. Thus, the placement stage 7 and the code disk 30 can be driven to rotate around the central axis of the code disk 30 placed on it by a drive device. After the rotating code disk 30 is detected by the optocoupler 6, the detection data is transmitted to the control module 19. The control module 19 then determines whether the code disk 30 is qualified based on the parameters preset by the control module 19, greatly saving detection time.

[0064] In some embodiments, such as Figure 14As shown, the code disk detection device also includes a drive motor 9. The placement stage 7 is rotatably mounted on the bracket 25 around the central axis of the code disk 30 placed on it via the drive motor 9. For example, the drive motor 9 has a first upper cover 8 mounted on its output end; the drive motor 9 is mounted on the mounting base 23 via a third mounting seat 10; the mounting base 23 can be fixed relative to the bracket 25, integrally formed with the bracket 25, or it can be the bracket 25 itself. For example, the drive motor 9 can be a radar motor. Thus, when detecting the code disk 30, the placement stage 7 can be rotated by the drive motor 9, and detection can be performed simultaneously via the optocoupler 6, thereby greatly improving detection efficiency. Preferably, as... Figure 14 As shown, the code disk detection device also includes a control module 19, which is connected to at least one of the code disk 30 and the drive motor 9. Therefore, the control module 19 can not only control the rotation of the drive motor 9, but also control the optical coupler 6 to transmit and receive optical signals, and can compare the detection results of the optical coupler 6 with preset parameters to determine whether the code disk 30 is qualified. To improve the portability of the code disk detection device, such as... Figure 14As shown, the encoder detection device also includes a chassis body 16, a chassis base plate 15, a chassis top cover 11, a data transmission cable 12, an input power cable 13, a power supply box 14, a start switch 17, an emergency stop switch 18, a coil guard 20, a serial port board 21, and a handle 22. The chassis base plate 15 is located below the chassis body 16 and is used to support components such as the control module 19, the power supply box 14, and the serial port board 21. The serial port board 21 is used to realize serial communication between the control module 19 and external devices. The chassis body 16 is used to house components such as the control module 19, the power supply box 14, and the serial port board 21, and is used to mount the start switch 17 and the emergency stop switch 18 on its surface. The start and stop of the entire code disk detection device are controlled by the start switch 17 and the emergency stop switch 18. The top cover 11 is located above the main body 16 of the chassis and is used to support the bracket 25. The top cover 11 is equipped with a handle 22 for easy lifting of the top cover 11 to inspect and maintain the components in the main body 16 of the chassis. The data transmission line 12 is used to connect the data of the control module 19 to an external computer. The data transmission line 12 can be, for example, a USB data transmission line. The input power line 13 is used to connect the power supply box 14 to an external power source for charging. The protective coil 20 can be, for example, made of rubber, to protect the data transmission line 12 from damage caused by scratches from the chassis. Preferably, the drive motor 9 is the same as the motor that drives the code disk 30 to rotate in the radar, so that the detection of the code disk 30 can be completed without the need for professional two-dimensional and three-dimensional detection equipment, which greatly saves equipment costs. Preferably, the optical coupler 6 and the control module 19 are the same as the optical coupler and transceiver module in the radar, so that the test results of the code disk 30 are more in line with the radar application requirements. At the same time, the code disk 30 can be tested without the need for professional two-dimensional and three-dimensional detection equipment, which greatly saves equipment costs.

[0065] In some preferred embodiments, such as Figure 15As shown, the code disk detection device further includes a positioning pin 40, and at least two of a first positioning hole 402, a second positioning hole 704, and a third positioning hole adapted to the positioning pin 40. The first positioning hole 402 is fixedly disposed relative to the optocoupler 6, the second positioning hole 704 is fixedly disposed relative to the placement platform 7, and the third positioning hole is fixedly disposed relative to the rotating shaft of the drive motor 9 and coaxially disposed with the rotating shaft of the drive motor 9. For example, the first positioning hole 402 is integrally formed or machined on the mounting cantilever 4. Thus, the positioning pin 40 can also ensure that at least two of the first positioning hole 402, the second positioning hole 704, and the third positioning hole are adapted to ensure that the position of the optocoupler 6 and the code disk 30 does not shift, thereby ensuring the detection accuracy of the optocoupler 6. Preferably, the coaxiality of at least two of the first positioning hole 402, the second positioning hole 704 and the third positioning hole is controlled between 0.01 mm and 0.08 mm, so that the positioning pin can pass through the first positioning hole, the second positioning hole and the third positioning hole at the same time, ensuring the installation accuracy of the optocoupler relative to the placement stage and the motor, thereby ensuring the accuracy of the detection.

[0066] In this invention, the connection or installation is a fixed connection unless otherwise specified. A fixed connection can be implemented as a detachable or non-detachable connection commonly used in the prior art. A detachable connection can be implemented using existing technologies, such as threaded connections or keyed connections. A non-detachable connection can also be implemented using existing technologies, such as welding or adhesive bonding.

[0067] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A code disk detection fixture, characterized in that, include: Scaffold (25); A placement platform (7) for placing a code disk (30) is provided on the placement platform (7), and a first limiting structure and a first positioning structure are provided on the placement platform (7). The placement platform (7) is rotatably disposed on the bracket (25) about the central axis of the code disk (30) placed thereon. The first limiting structure is used to restrict the code disk (30) from rotating about its central axis relative to the placement platform (7), and the first positioning structure is used to restrict the code disk (30) from moving radially relative to the placement platform (7). And an optocoupler (6) for detecting the code disk (30) mounted on the bracket (25).

2. The code disk detection fixture according to claim 1, characterized in that, It also includes a first moving unit with a limiting function; The optocoupler (6) is mounted on the bracket (25) via the first moving unit; The first moving unit is configured to drive the optocoupler (6) to move along the central axis of the code disk (30) placed on the placement stage (7) to a set position.

3. The code disk detection fixture according to claim 2, characterized in that, The first moving unit includes a first moving mechanism and a second limiting structure; The first moving mechanism is mounted on the bracket (25) and is used to drive the optocoupler (6) to move along the central axis of the code disk (30) placed on the placement platform (7); The second limiting structure is configured to restrict the first moving mechanism from moving the code disk (30) to a minimum distance Lmin from the placement table (7); and / or It also includes a first limiting unit (2), which is disposed on the bracket (25) and configured to limit the first moving unit from moving the code disk (30) to the maximum distance Lmax from the placement platform (7).

4. The code disk detection fixture according to claim 3, characterized in that, The first moving mechanism includes a first guide rail (27) and a first slider (26) that are adapted to each other. The first guide rail (27) is arranged along the direction of the central axis of the code disk (30) placed on the placement table (7). The first guide rail (27) is fixedly arranged relative to the bracket (25). The optocoupler (6) is arranged on the first slider (26). The second limiting structure is a limiting block (24) that restricts the first slider (26) from moving toward the placement platform (7) to a minimum distance Lmin, the limiting block (24) being fixedly disposed relative to the bracket (25); and / or The first limiting unit (2) includes a first magnetic component (2a) and a second magnetic component (2b) that can magnetically attract each other. The first magnetic component (2a) is fixedly disposed relative to the first guide rail (27), and the second magnetic component (2b) is fixedly disposed relative to the first slider (26).

5. The code disk detection fixture according to claim 4, characterized in that, The first slider (26) and the limiting block (24) are provided with a first protrusion (241) and a first mating hole (401) that are adapted to each other. The first mating hole (401) is a non-circular hole and the first protrusion (241) is a non-cylindrical protrusion.

6. The code disk detection fixture according to claim 2, characterized in that, It also includes a sunshade (5); The optical coupler (6) is mounted on the first moving unit via the light shield (5); The first moving unit is configured to drive the optical coupler (6) and the light shield (5) to move along the direction of the central axis of the code disk (30) placed on the placement platform (7) to a set position.

7. The code disk detection fixture according to any one of claims 1 to 6, characterized in that, The first limiting structure is a recess (703) that is fixedly disposed relative to the placement platform (7) and adapted to the protrusion (33) of the code disk (30); and / or The first positioning structure includes a first positioning block (701) and a second positioning block (702) fixedly disposed relative to the placement platform (7). The first positioning block (701) and the second positioning block (702) are configured to abut against the outer diameter of the code disk (30) placed on the placement platform (7), and at least a portion of the second positioning block (702) is located on the side of the code disk (30) opposite to the first positioning block (701).

8. A code disk detection device, characterized in that, Includes the code disk (30) detection fixture as described in any one of claims 1 to 7.

9. The code disk detection device according to claim 8, characterized in that, It also includes a drive motor (9), and the placement platform (7) is rotatably mounted on the bracket (25) about the central axis of the code disk (30) on it via the drive motor (9).

10. The code disk detection device according to claim 9, characterized in that, It also includes a control module (19) connected to at least one of the encoder (30) and the drive motor (9); and / or It also includes a positioning pin (40), and at least two of a first positioning hole (402), a second positioning hole (704) and a third positioning hole adapted to the positioning pin (40). The first positioning hole (402) is fixedly disposed relative to the optocoupler (6), the second positioning hole (704) is fixedly disposed relative to the placement platform (7), and the third positioning hole is fixedly disposed relative to the shaft of the drive motor (9) and coaxially disposed with the shaft of the drive motor (9).

11. The code disk detection device according to claim 10, characterized in that, The drive motor (9) is the same as the motor that drives the code disk (30) in the radar; and / or The coaxiality of at least two of the first positioning hole (402), the second positioning hole (704) and the third positioning hole is controlled to be between 0.01 mm and 0.08 mm.

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