A high-precision anti-overturning torque rotating device for optical measurement

Abstract

The application discloses a high-precision anti-overturning torque rotating device for optical measurement, which comprises a mounting bottom plate, a supporting shell, a rotating driving assembly, a rotating table, a mounting flange, a universal connecting seat and a universal connecting shaft, and a universal compatible micro swing structure is arranged on the matched end faces of the universal connecting seat and the universal connecting shaft so as to eliminate the overturning torque in the rotating direction of the rotating table; the rotating device is provided with the universal connecting seat and the universal connecting shaft between the rotating table and the upper load, and the universal compatible micro swing structure is matched, so that the rotating shaft of the rotating device can produce a slight tilt, but the rotating precision is not affected; the rotating device overcomes the shortcoming that the traditional high-precision rotating table cannot bear the overturning torque, guarantees the precision of the high-precision rotating table, can be used for the installation of heavy optical measurement instruments, and can be compatible with the overturning torque caused by the installation of general optical measurement long-focus and short-focus lenses.

Description

Technical Field

[0001] This invention relates to the field of rotating device technology, and more specifically to a high-precision anti-overturning torque rotating device for optical measurement. Background Technology

[0002] Precision positioning rotary stages are used for metrology and calibration testing, primarily providing rotational axis systems and angular references. They are applied in various sectors including mechanical manufacturing, metrology and testing, optical measurement, deflection and deformation measurement of large facilities, and aerospace. In recent years, in particular, optical measurement methods have been increasingly used for non-contact measurement of bridges, tunnels, large machinery, and large buildings. During the measurement process, the angle of the optical measuring device needs to be continuously adjusted to measure or calibrate different measurement points, necessitating the use of high-precision and high-efficiency positioning rotary stages. An optical measurement rotary stage is typically a one-dimensional rotating device, consisting of a platform, base, and mounting bracket. This type of one-dimensional rotary stage can only provide torque in the direction of rotation and cannot withstand overturning moments (the bending moment it can withstand is less than 5 N·m).

[0003] Currently, high-precision turntables available on the market can provide relatively large torque in the direction of rotation, but none of them can withstand overturning torque. Once the overturning torque exceeds the standard, it will seriously affect the rotational accuracy of the turntable. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art by providing a high-precision anti-overturning moment rotating device for optical measurement.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A high-precision anti-overturning moment rotary device for optical measurement includes a mounting base plate and a support housing disposed on the mounting base plate. A rotary drive assembly is disposed on the mounting base plate within the space covered by the support housing. A rotary table is disposed on the rotary drive assembly, and a torque-dissipating assembly is disposed on the rotary table. A mounting flange is connected to the torque-dissipating assembly, and the mounting flange is located above the support housing. The torque-dissipating assembly includes a universal joint seat disposed on the rotary table, and a universal joint shaft is disposed on the universal joint seat. A universal-compatible micro-oscillation structure is provided on the mating end faces of the universal joint seat and the universal joint shaft to eliminate overturning moments other than those in the rotation direction of the rotary table. The upper end of the universal joint shaft passes through the support housing and connects to the mounting flange.

[0007] This rotating device, by providing the universal joint and the universal joint shaft between the turntable and the upper load, and in conjunction with the universal-compatible micro-oscillation structure, allows the rotating shaft of this rotating device to produce a slight tilt without affecting the rotation accuracy; it overcomes the shortcomings of traditional high-precision turntables that cannot withstand overturning moments, and can be used for the installation of heavier optical measuring instruments, and is compatible with the overturning moments brought about by the installation of general optical measuring long focal length and short focal length lenses.

[0008] This rotating device is small in size, occupies little space, and has a compact structure. Through modular design, the main components are all located inside the supporting shell, making the entire device simple and beautiful in appearance. The assembled rotating device has a regular integrated structure, which makes it easy to install on a tripod. The installation difficulty is low, which can improve the installation efficiency of surveyors.

[0009] This rotating device, through the installation of torque-dissipating components on the rotating platform and the use of high-precision rotating drive components, ensures excellent rotational accuracy and stability of the rotating platform.

[0010] The torque-dissipating assembly, which is a combination of the universal joint, the universal joint shaft, and the universal-compatible micro-oscillation structure, can be used as a rotating shaft to transmit the rotational motion of the rotary table to the mounting flange. On the other hand, it can counteract and adjust the unbalanced torque from above the mounting flange, and eliminate the overturning torque from above. In particular, it can overcome the defect that high-precision rotary tables cannot withstand overturning torque, and maintain the high-precision operation and output of the high-precision rotary table.

[0011] Furthermore, the universal compatible micro-oscillating structure includes a spherical protrusion disposed in the middle of the universal connector, and a tight-fitting boss disposed around the spherical protrusion, wherein the tight-fitting boss is provided with a plurality of radial tight-fitting grooves.

[0012] The universal compatible micro-oscillating structure also includes a spherical groove at the center of the end of the universal connecting shaft, and a plurality of radial spokes arranged around the spherical groove. The outer ends of the radial spokes are detachably connected to universal adjustment inserts.

[0013] The spherical protrusion is connected to the spherical groove through a spherical fit. The lower ends of the universal adjustment inserts are respectively arranged in the tight fit grooves, forming a tight fit surface in the circumferential direction and a movable space in the axial direction.

[0014] The universal compatible micro-oscillating structure allows the universal connector and the universal connector shaft to form a tight circumferential connection, while leaving a gap in the vertical direction, which is the movable space. When the connecting shaft is subjected to an overturning moment, the small movable space between the two can be used for adaptive adjustment to avoid the overturning moment being transmitted to the rotary table below and affecting the rotation accuracy of the rotary table.

[0015] The spherical protrusion and the spherical groove in the middle can be connected together to form a spherical support structure in the middle, which can adapt to the force support in different directions. The tight-fitting groove and the universal adjustment insert are arranged in a one-to-one correspondence, which can transmit circumferential force and ensure the output of rotational motion. In the vertical direction, the bottom of the universal adjustment insert does not directly contact the bottom of the tight-fitting groove, and the top is also universally connected to the universal connecting shaft. This ensures that when the universal connecting shaft is subjected to unbalanced external force, the universal connecting seat and the rotating table below are subjected to balanced and stable force.

[0016] The universal adjustment insert is set on the outer periphery of the universal connecting shaft, which facilitates installation and disassembly, and can also form an internal and external fit with the spherical protrusion set at the center.

[0017] Furthermore, the radial spokes are provided with a snap-fit ​​groove at the outer periphery of the end of the universal joint shaft, the snap-fit ​​groove having a spherical groove portion and a necked groove portion; the universal adjustment insert has a universal ball head, a neck and a mating block connected as one piece, the universal ball head is disposed in the spherical groove portion, the neck is snapped into the necked groove portion, and the mating block is installed in the tight-fit groove.

[0018] The universal adjustment insert with this structure can not only support and move the universal ball head in the spherical groove, but also limit the movement using the neck and constriction groove, and allow the mating block to be fitted into the tight-fitting groove.

[0019] Furthermore, each radial spoke is correspondingly arranged with a corresponding tight-fitting groove, and 15 to 30 tight-fitting grooves are arranged symmetrically at the center. Shallow radial grooves are also present between adjacent radial spokes, and these radial grooves correspond precisely to the radial protrusions on the tight-fitting bosses.

[0020] Furthermore, the inner circumferential surface of the tight-fitting boss is a tapered structure with a smaller bottom and a larger top, and the circumferential width of the tight-fitting groove gradually decreases from the outer radial direction to the inner diameter direction; the axial height of the spherical protrusion is greater than the height of the tight-fitting boss, the size of the spherical protrusion exceeds the size of a hemisphere, and the size of the spherical groove is smaller than the size of a hemisphere. This arrangement can form a spherical mating connection and also create a small gap between the universal joint shaft and the end face of the tight-fitting boss.

[0021] Furthermore, the size of one end of the universal joint shaft is larger than the size of the other end. The outer periphery of the larger end is provided with a stepped structure and the universal compatible micro-oscillation structure (the radial spokes) is provided on the end face. The smaller end face is provided with several connection and mounting holes for connecting the mounting flange.

[0022] Furthermore, a limiting ring is also sleeved on the outer periphery of the end of the universal joint shaft connected to the universal adjustment insert block. The inner periphery of the limiting ring is provided with an annular groove. The limiting ring is detachably connected to the outer periphery of the end of the universal joint shaft by a number of fasteners.

[0023] The limiting ring can form a limit at one circle of the universal ball head, and the annular groove accommodates the outer circumference of the universal ball head, so that the universal ball head can rotate within the space enclosed by the annular groove and the snap-fit ​​groove. The limiting ring is fixed to the outer circumference of the universal connecting shaft by fasteners, such as screws, which makes disassembly and assembly convenient and can also form a stable structure.

[0024] Furthermore, the upper end face of the support housing is provided with an axial through hole, and a bearing and a bearing cap are provided between the upper end of the universal joint shaft and the axial through hole. A dustproof ring is also provided above the bearing cap. The bearing is provided to enable the universal joint shaft to output rotational motion, and the dustproof ring provides a sealing function to prevent dust and rainwater from entering the support housing.

[0025] Furthermore, the rotation drive assembly includes a drive module mounting base, a driver, and a tilt sensor disposed on the mounting base, and a motor drive module disposed above the drive module mounting base. The driver and the tilt sensor are arranged below the drive module mounting base, and the rotary table is disposed above the motor drive module. The motor drive module, the tilt sensor, and the driver are electrically connected, and the driver is also connected to a USB adapter.

[0026] Furthermore, the drive module mounting base is a platform structure supported at four corners, with a through hole in the middle; the mounting base plate is a rectangular plate, and handles are provided on both sides of the mounting base plate for easy hand holding of the entire device; the mounting base plate also has mounting holes at the bottom to fix the rotating device on a tripod or mounting table.

[0027] The high-precision turntable of this invention comprehensively considers structural load-bearing capacity, servo drive system and electronic control, as well as accuracy testing and error compensation system. It integrates precision-machined structural components, high-precision drive motor, high-precision circular grating, high-precision tilt sensor and high-rigidity and high-efficiency drive control system; it realizes a high-load, high-precision, high-efficiency and high-rigidity measuring device, which is suitable for medium-sized load optical measuring instruments.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The rotating device, by providing the universal joint and the universal joint shaft between the rotating table and the upper load, and in conjunction with the universal-compatible micro-oscillation structure, allows the rotating shaft of the rotating device to produce a slight tilt without affecting the rotation accuracy; it overcomes the shortcomings of traditional high-precision turntables that cannot withstand overturning moments, and can be used for the installation of heavier optical measuring instruments, and is compatible with the overturning moments brought about by the installation of general optical measuring long-focal and short-focal-length lenses; 2. The rotating device is small in size, occupies little space, and has a compact structure. Through modular design, the main components are all set inside the support shell, making the entire device simple and beautiful in appearance; the assembled rotating device is a regular integrated structure, which is convenient for overall installation on a tripod, and the installation difficulty is low, which can improve the installation efficiency of measuring personnel; 3. The rotating device improves the rotation accuracy of the rotating table. 4. The structure formed by the universal connector, universal connecting shaft, and universal-compatible micro-oscillation structure can be used as a rotating shaft to transmit the rotational motion of the rotary table to the mounting flange. On the other hand, it can counteract and adjust the unbalanced torque from above the mounting flange and eliminate the overturning torque from above. This can overcome the defect that high-precision rotary tables cannot withstand overturning torque and maintain the high-precision operation and output of the high-precision rotary table. 5. The universal-compatible micro-oscillation structure allows the universal connector and the universal connecting shaft to form a tight circumferential connection, while leaving a gap in the vertical direction, which is the activity space. When the connecting shaft is subjected to an overturning torque, the small activity space between the two can be used for adaptive adjustment to avoid the overturning torque being transmitted to the rotary table below and affecting the rotational accuracy of the rotary table. Attached Figure Description

[0029] Figure 1 This is a frontal exploded view of the rotating device for high-precision anti-overturning moment used in optical measurement according to the present invention.

[0030] Figure 2 This is a three-dimensional exploded view of the rotating device for high-precision anti-overturning moment used in optical measurement according to the present invention.

[0031] Figure 3 This is a three-dimensional structural diagram of the universal connector and universal connector shaft of the present invention;

[0032] Figure 4 This is a front structural diagram of the universal connector and universal connector shaft of the present invention;

[0033] Figure 5 for Figure 4 Schematic diagram of the AA section structure;

[0034] Figure 6 This is a schematic diagram of the end face structure of the universal connector and the universal connector shaft of the present invention;

[0035] Figure 7 This is an exploded view of the end face of the universal joint shaft of the present invention;

[0036] Figure 8 This is a schematic diagram showing the rotating device of the present invention mounted on a tripod in use;

[0037] In the diagram: 1. Mounting base plate; 2. Support housing; 3. Rotary table; 4. Universal connector; 401. Spherical protrusion; 5. Universal connector shaft; 501. Spherical groove; 502. Radial spokes; 503. Spherical groove section; 504. Necked groove section; 6. Universal adjustment insert block; 601. Universal ball head; 602. Neck; 603. Mating block; 7. Limiting ring; 701. Annular slide groove; 8. Precision bearing; 9. Bearing cover; 10. Dustproof ring; 11. Mounting flange; 12. Drive module mounting base; 13. Motor drive module; 14. Driver; 15. Tilt sensor; 16. USB adapter; 17. Handle; 18. Tight-fitting boss; 1801. Tight-fitting groove; 19. Tight-fitting surface; 20. Movement space. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely 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.

[0039] In the description of this invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] like Figures 1 to 7 As shown, a high-precision anti-overturning moment rotary device for optical measurement includes a mounting base plate 1 and a support housing 2 disposed on the mounting base plate 1. A rotary drive assembly is disposed on the mounting base plate 1 within the space covered by the support housing 2. A rotary stage 3 is disposed on the rotary drive assembly. A torque-eliminating assembly is disposed on the rotary stage 3. A mounting flange 11 is connected to the torque-eliminating assembly and is located above the support housing 2. The torque-eliminating assembly includes a universal joint seat 4 disposed on the rotary stage 3. A universal joint shaft 5 is disposed on the universal joint seat 4. A universal compatible micro-oscillation structure is provided on the mating end faces of the universal joint seat 4 and the universal joint shaft 5 to eliminate overturning moments other than those in the rotation direction of the rotary stage. The upper end of the universal joint shaft 5 passes through the support housing 2 and is connected to the mounting flange 11.

[0041] This rotating device, by providing the universal joint 4 and the universal joint shaft 5 between the rotating platform 3 and the upper load, and in conjunction with the universal-compatible micro-oscillation structure, allows the rotating shaft of this rotating device to produce a slight tilt without affecting the rotation accuracy; it overcomes the shortcomings of traditional high-precision turntables that cannot withstand overturning moments, and can be used for the installation of heavier optical measuring instruments, and is compatible with the overturning moments brought about by the installation of general optical measuring long focal length and short focal length lenses.

[0042] This rotating device is small in size, occupies little space, and has a compact structure. Through modular design, the main components are all located inside the support shell 2, making the entire device simple and beautiful in appearance. The assembled rotating device has a regular integrated structure, which makes it easy to install on a tripod. The installation difficulty is low, which can improve the installation efficiency of the measuring personnel.

[0043] This rotating device, through the setting of torque-dissipating components on the rotary table 3 and in conjunction with high-precision rotating drive components, ensures the rotational accuracy and stability of the rotary table.

[0044] The torque-dissipating assembly, which is a combination of the universal joint, the universal joint shaft, and the universal-compatible micro-oscillation structure, can be used as a rotating shaft to transmit the rotational motion of the rotary table to the mounting flange. On the other hand, it can counteract and adjust the unbalanced torque from above the mounting flange, and eliminate the overturning torque from above. In particular, it can overcome the defect that high-precision rotary tables cannot withstand overturning torque, and maintain the high-precision operation and output of the high-precision rotary table.

[0045] Furthermore, the universal compatible micro-oscillating structure includes a spherical protrusion 401 disposed in the middle of the universal connector 4, and a tight-fitting boss 18 disposed around the spherical protrusion 401, wherein the tight-fitting boss 18 is provided with a plurality of radial tight-fitting grooves 1801.

[0046] The universal compatible micro-oscillation structure also includes a spherical groove 501 located at the center of the end of the universal connecting shaft 5, and a plurality of radial spokes 502 arranged around the spherical groove 501. The outer ends of the radial spokes 502 are detachably connected to universal adjustment inserts 6.

[0047] The spherical protrusion 401 is spherically connected to the spherical groove 501. The lower ends of the universal adjustment insert 6 are respectively arranged in the tight fit groove 1801, forming a tight fit surface 19 in the circumferential direction and a movable space 20 in the axial direction.

[0048] The universal compatible micro-oscillating structure allows the universal connector 4 and the universal connector shaft 5 to form a tight circumferential connection, while leaving a gap in the vertical direction, namely the movable space 20. When the universal connector shaft 5 is subjected to an overturning moment, the small movable space between the two can be used for adaptive adjustment to avoid the overturning moment being transmitted to the rotary table below and affecting the rotation accuracy of the rotary table.

[0049] The spherical protrusion 401 and the spherical groove 501 in the middle can be connected together to form a spherical support structure in the middle, which can adapt to the force support in different directions. The tight-fitting groove 1801 and the universal adjustment insert 6 are arranged in a one-to-one correspondence, which can transmit circumferential force and ensure the output of rotational motion. In the vertical direction, the bottom of the universal adjustment insert 6 is not in direct contact with the bottom of the tight-fitting groove 1801, and the top is also universally connected to the universal connecting shaft 5. This ensures that when the universal connecting shaft 5 is subjected to unbalanced external force, the universal connecting seat 4 and the rotating table 3 below can be subjected to balanced and stable force.

[0050] The universal adjustment insert 6 is set on the outer periphery of the universal connecting shaft 5, which facilitates installation and disassembly, and can also form an internal and external fit with the spherical protrusion set at the center.

[0051] Furthermore, the radial spokes 502 are provided with a snap-fit ​​groove at the outer periphery of the end of the universal joint shaft 5. The snap-fit ​​groove has a spherical groove portion 503 and a necked groove portion 504. The universal adjustment insert 6 has a universal ball head 601, a neck 602 and a mating block 603 connected as one piece. The universal ball head 601 is disposed in the spherical groove portion 503. The neck 602 is snapped into the necked groove portion 504. The mating block 603 is installed in the tight fit groove 1801.

[0052] The universal adjustment insert 6 with this structure can not only support and move the universal ball head 601 in the spherical groove, but also limit the movement using the neck 602 and the constricted groove portion 504, and also allow the mating block 603 to be installed in the tight-fitting groove 1801.

[0053] Furthermore, each radial spoke is correspondingly arranged with a corresponding tight-fitting groove, and there are 20 tight-fitting grooves arranged symmetrically at the center. Shallow radial grooves are also present between adjacent radial spokes, and these radial grooves correspond precisely to the radial protrusions on the tight-fitting bosses.

[0054] Furthermore, the inner circumferential surface of the tight-fitting boss 18 is a tapered structure with a smaller bottom and a larger top, and the circumferential width of the tight-fitting groove 1801 gradually decreases from the outer radial direction to the inner diameter direction; the axial height of the spherical protrusion 401 is greater than the height of the tight-fitting boss 18, the size of the spherical protrusion 401 exceeds the size of a hemisphere, and the size of the spherical groove 501 is smaller than the size of a hemisphere. This arrangement can form a spherical mating connection and also form a small gap between the universal joint shaft and the end face of the tight-fitting boss.

[0055] Furthermore, the size of one end of the universal joint shaft 5 is larger than the size of the other end. The outer periphery of the larger end is provided with a stepped structure and the radial spokes 502 are provided on the end face. The smaller end face is provided with several connection and mounting holes for connecting the mounting flange 11.

[0056] Furthermore, a limiting ring 7 is also sleeved on the outer periphery of the end of the universal connecting shaft 5 connected to the universal adjusting insert block 6. The inner periphery of the limiting ring 7 is provided with an annular sliding groove 701. The limiting ring 7 is detachably connected to the outer periphery of the end of the universal connecting shaft 5 by a number of fasteners.

[0057] The limiting ring 7 can form a limit at one circle of the universal ball joint 601, and the annular groove 701 accommodates the outer periphery of the universal ball joint 601, so that the universal ball joint 601 can rotate within the space enclosed by the annular groove 701 and the spherical groove portion of the snap-fit ​​groove. The limiting ring 7 is fixed to the outer periphery of the universal connecting shaft 5 by fasteners, such as screws, which is convenient to disassemble and assemble, and can also form a stable structure.

[0058] Furthermore, the upper end face of the support housing 2 is provided with an axial through hole, and a precision bearing 8 and a bearing cap 9 are provided between the upper end of the universal joint shaft 5 and the axial through hole. A dustproof ring 10 is also provided above the bearing cap 9. The precision bearing 8 is provided to enable the universal joint shaft 5 to output rotational motion, and the dustproof ring 10 is provided to provide a sealing function to prevent dust and rainwater from entering the support housing 2.

[0059] Furthermore, the rotation drive assembly includes a drive module mounting base 12, a driver 14, and a tilt sensor 15 disposed on the mounting base 1, and a motor drive module 13 disposed above the drive module mounting base 12. The driver 14 and the tilt sensor 15 are arranged below the drive module mounting base 12. The rotary table 3 is disposed above the motor drive module 13. The motor drive module 13, the tilt sensor 15, and the driver 14 are electrically connected. The driver 14 is also connected to a USB adapter 16.

[0060] The rotary table has a table diameter of 150mm and a load capacity of approximately 30kg. The rotating device requires high motor rotational accuracy, so a frameless torque motor is selected. This one-dimensional rotary table requires high angular measurement accuracy; therefore, a high-precision circular encoder is used, employing a Renishaw DSi interface, which allows two SiGNUM encoders to be mounted on a single RESM ring. TM SR reading head, outputs a highly repeatable propoZ TMThe reference position signal is completely unaffected by bearing misalignment or power cycle. By combining the signals from the two reading heads using DSi, eccentricity is easily corrected. After DSi eliminates eccentricity, the remaining errors are only the marking error and period error (electronic subdivision error - SDE), both of which are very small. When RESSM is used with DSi, an overall installation error better than ±1.5 arcseconds can be achieved. The motor driver selected is an Elmo driver, whose advantages are mainly reflected in: extremely short sampling times for current, speed, and position loops, resulting in very high system bandwidth, and thus very stable and highly responsive and rigid system characteristics; support for feedback sensors with any open protocol; and full closed-loop control with an efficiency of 99%. The torque motor, angle sensor, and drive (controller) together constitute the drive module of this device; structurally, the torque motor and angle sensor are integrated into a single design, and then a one-dimensional rotary table module is custom-made. By incorporating the torque-dissipating component on the rotary table, the inability to withstand overturning moments is overcome, allowing the optical measuring device to withstand the relatively heavy weight of the measuring body. During installation, the center of gravity of the measuring instrument does not need to be controlled within a certain range of the rotary table's center, making it adaptable to optical measuring instruments and lenses of various unusual shapes. Furthermore, the device is equipped with a high-precision tilt sensor, capable of reading the attitude data after installation.

[0061] Furthermore, the drive module mounting base 12 is a platform structure with four corner supports and a through hole in the middle; the mounting base plate 1 is a rectangular plate, and handles 17 are provided on both sides of the mounting base plate 1 to facilitate holding the entire device; the mounting base plate 1 is also provided with mounting holes at the bottom to fix the rotating device on a tripod.

[0062] like Figure 8 As shown, the rotating device has mounting holes at the bottom. After fitting the connector, it is fixed to a tripod. During installation, a coarse leveling operation is required. Adjust the bubble level so that the bubble is centered. After completing the coarse leveling, install the optical measuring instrument onto the mounting flange 11 on the upper surface of the one-dimensional rotating device. After installation, power on the device to read and record its attitude data. The optical measuring instrument is then used to measure the object. Changing between telephoto and short-focal-length lenses during measurement does not affect the working state of the one-dimensional rotating device. It overcomes the unbalanced overturning moment caused by a single lens, ensuring the rotational accuracy of the lens. In this application case, the rotary table accuracy can reach up to ±1.5 arcseconds. The device is small in size, and after measurement, the one-dimensional rotating device can be disassembled and packaged separately for transport, making operation and transportation very convenient.

[0063] Although embodiments of the invention have been shown and described, 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 high-precision anti-overturning moment rotating device for optical measurement, comprising a mounting base plate and a support housing disposed on the mounting base plate, characterized in that, A rotary drive assembly is provided on the mounting base plate within the space covered by the support housing. A rotary table is mounted on the rotary drive assembly, and a torque-dissipating assembly is mounted on the rotary table. A mounting flange is connected to the torque-dissipating assembly, and the mounting flange is located above the support housing. The torque-dissipating assembly includes a universal joint seat mounted on the rotary table, and a universal joint shaft is mounted on the universal joint seat. A universal-compatible micro-oscillation structure is provided on the mating end faces of the universal joint seat and the universal joint shaft to eliminate overturning torques outside the rotation direction of the rotary table. The upper end of the universal joint shaft passes through the support housing and connects to the mounting flange. The universal-compatible micro-oscillating structure includes a spherical protrusion located in the middle of the universal connector seat, and a tight-fitting boss surrounding the spherical protrusion. The tight-fitting boss has several radial tight-fitting grooves. The universal-compatible micro-oscillating structure also includes a spherical groove located at the center of the end of the universal connector shaft, and several radial spokes surrounding the spherical groove. Universal adjustment inserts are detachably connected to the outer ends of the radial spokes. The spherical protrusion and the spherical groove are spherically engaged. The lower ends of the universal adjustment inserts are respectively arranged in the tight-fitting grooves, forming a tight-fitting surface in the circumferential direction and a movable space in the axial direction.

2. The high-precision anti-overturning moment rotating device for optical measurement according to claim 1, characterized in that, The radial spokes are provided with a snap-fit ​​groove at the outer periphery of the end of the universal joint shaft. The snap-fit ​​groove has a spherical groove portion and a necked groove portion. The universal adjustment insert has a universal ball head, a neck and a mating block connected as one piece. The universal ball head is disposed in the spherical groove portion, the neck is snapped into the necked groove portion, and the mating block is installed in the tight-fit groove.

3. The high-precision anti-overturning moment rotating device for optical measurement according to claim 1, characterized in that, The radial spokes are arranged in a one-to-one correspondence with the tight-fitting grooves, and there are 15 to 30 tight-fitting grooves arranged symmetrically at the center.

4. The high-precision anti-overturning moment rotating device for optical measurement according to claim 1, characterized in that, The inner circumferential surface of the tight-fitting boss is a conical structure with a smaller bottom and a larger top. The circumferential width of the tight-fitting groove gradually decreases from the outer radial direction to the inner diameter direction. The axial height of the spherical protrusion is greater than the height of the tight-fitting boss. The size of the spherical protrusion exceeds the size of a hemisphere. The size of the spherical groove is smaller than the size of a hemisphere.

5. The high-precision anti-overturning moment rotating device for optical measurement according to claim 1, characterized in that, The universal joint shaft has a larger size at one end than at the other end. The larger end has a stepped structure on its outer periphery and a universal-compatible micro-oscillation structure on its end face. The smaller end face has several connection and mounting holes for connecting the mounting flange.

6. The high-precision anti-overturning moment rotating device for optical measurement according to claim 1, characterized in that, The universal joint shaft is connected to the universal adjustment insert block, and a limiting ring is also sleeved on the outer periphery of the end. The inner periphery of the limiting ring is provided with an annular groove. The limiting ring is detachably connected to the outer periphery of the end of the universal joint shaft by a number of fasteners.

7. The high-precision anti-overturning moment rotating device for optical measurement according to claim 1, characterized in that, The upper end face of the support housing is provided with an axial through hole, and a bearing and a bearing cover are provided between the upper end of the universal connecting shaft and the axial through hole. A dustproof ring is also provided above the bearing cover.

8. The high-precision anti-overturning moment rotating device for optical measurement according to claim 1, characterized in that, The rotation drive assembly includes a drive module mounting base, a driver, and a tilt sensor mounted on the mounting base, and a motor drive module mounted above the drive module mounting base. The driver and the tilt sensor are arranged below the drive module mounting base. The rotary table is mounted above the motor drive module. The motor drive module, the tilt sensor, and the driver are electrically connected. The driver is also connected to a USB adapter.

9. The high-precision anti-overturning moment rotating device for optical measurement according to claim 8, characterized in that, The drive module mounting base is a platform structure supported at four corners, with a through hole in the middle; the mounting base plate is a rectangular plate, with handles on both sides and mounting holes at the bottom to fix the rotating device on a tripod or mounting platform.

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