Universal cylindrical mirror bus measuring device

By using a servo motor to drive a threaded rod and a bevel gear mechanism to automatically adjust the position of the laser rangefinder, the problem of cumbersome operation of the cylindrical mirror generatrix measuring device and the inconvenience of disassembling the laser rangefinder is solved, thus realizing convenient automatic measurement and maintenance.

CN224189158UActive Publication Date: 2026-05-01FUJIAN RAYPHOTON TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
FUJIAN RAYPHOTON TECH CO LTD
Filing Date
2025-05-05
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

Existing cylindrical mirror busbar measuring devices are cumbersome to operate, requiring manual movement of the laser rangefinder. Furthermore, the fixed installation of the laser rangefinder makes disassembly inconvenient, leading to difficulties in inspection, maintenance, or replacement.

Method used

The laser rangefinder is automatically adjusted by using a servo motor to drive the threaded rod and bevel gear mechanism. The limit block and knob design facilitates the disassembly of the laser rangefinder, enabling automatic measurement and convenient maintenance.

Benefits of technology

It enables automated measurement position adjustment of laser rangefinders, simplifies operation procedures, facilitates inspection, maintenance and replacement, and improves efficiency.

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Abstract

The utility model relates to the technical field of cylindrical mirror detection, and discloses a universal cylindrical mirror bus measuring device, which comprises a bottom plate and a laser range finder, and a cylindrical mirror is arranged at the top of the bottom plate. According to the universal cylindrical mirror bus measuring device, a first servo motor is started to drive a laser range finder to move forwards or backwards, a second servo motor is started to drive the laser range finder to move leftwards or rightwards, and the laser range finder is matched with left-right movement and front-back movement, so that the measurement precision is improved; in this way, the measurement position of the laser range finder is automatically adjusted, the laser range finder does not need to be manually moved, then two limiting blocks are driven to move downwards by pulling two circular blocks, and then two positioning blocks are moved out of two positioning grooves by screwing two rotary knobs, so that the laser range finder is conveniently and rapidly moved. At the moment, the connecting block is pulled out downwards from the interior of the connecting groove, the laser range finder can be detached, and then the laser range finder can be conveniently overhauled, maintained or replaced.
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Description

A general-purpose cylindrical mirror generatrix measuring device Technical Field

[0001] This utility model relates to the field of cylindrical mirror testing technology, specifically a general-purpose cylindrical mirror busbar measuring device. Background Technology

[0002] Cylindrical lenses are aspherical lenses that effectively reduce spherical and chromatic aberration. They are generally classified into plano-convex cylindrical lenses, plano-concave cylindrical lenses, biconvex cylindrical lenses, biconcave cylindrical lenses, meniscus cylindrical lenses, intercylindrical cylindrical lenses, and irregularly shaped cylindrical lenses, etc. They have one-dimensional magnification capabilities. Cylindrical lenses are mainly used to meet design requirements that alter the image size. Optical cylindrical lenses also have wide applications in high-power laser systems and synchrotron radiation beamlines. Meanwhile, the requirements for cylindrical lens components are becoming increasingly stringent, especially in high-precision testing instruments and devices such as cavity sheets in high-power laser resonators and long-distance line interferometers. Therefore, cylindrical lenses... During the manufacturing process of cylindrical mirrors, measuring devices are often used to measure the generatrix of the cylindrical mirror to avoid large deviations in the dimensions of the cylindrical mirror. However, in actual use, most existing cylindrical mirror generatrix measuring devices rely on manually moving a laser rangefinder to measure the generatrix of the cylindrical mirror, which is cumbersome and inconvenient to use. Furthermore, the laser rangefinders on existing measuring devices are mostly fixed and not easy to disassemble, making it difficult to inspect, maintain, or replace the laser rangefinder. Therefore, a universal cylindrical mirror generatrix measuring device is proposed. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a universal cylindrical mirror generatrix measuring device, which has advantages such as ease of use. It solves the problem that existing cylindrical mirror generatrix measuring devices mostly rely on manual movement of a laser rangefinder to measure the generatrix of the cylindrical mirror, which is cumbersome and inconvenient to use. Furthermore, the laser rangefinders on existing measuring devices are mostly fixedly installed, making them difficult to disassemble and thus hindering maintenance or replacement.

[0005] (II) Technical Solution

[0006] To achieve the aforementioned ease of use, this utility model provides the following technical solution: A universal cylindrical mirror busbar measuring device, comprising a base plate and a laser rangefinder. A cylindrical mirror is mounted on the top of the base plate. Two fixing blocks, located on the left and right sides of the cylindrical mirror respectively, are mounted on the top of the base plate. Electric telescopic rods are mounted on opposite sides of the two fixing blocks. The output ends of the two electric telescopic rods extend to the opposite sides of the two fixing blocks and are respectively fitted with clamps at one end that are attached to the left and right sides of the cylindrical mirror. A rectangular frame is mounted on the top of the base plate, located to the right of the right electric telescopic rod. A first threaded rod, extending to its front side, is mounted on the rear side of the inner wall of the rectangular frame. A movable block, with one end threaded to the outer side of the first threaded rod and the other end extending to the top of the rectangular frame, is mounted inside the rectangular frame. A first drive assembly, with one end fixedly connected to the outer side of the first threaded rod, is mounted on the front left side of the rectangular frame. A mounting block, extending above the cylindrical mirror, is mounted on the top of the movable block. A sliding groove is mounted on the left side of the bottom of the mounting block. A second threaded rod is mounted between the left and right sides of the inner wall of the sliding groove. The sliding groove has a slider on its left side, one end of which is threaded to the outside of the second threaded rod and the other end of which extends to the bottom of the mounting block. The mounting block has a second drive assembly on its top, one end of which extends into the sliding groove and is fixedly connected to the outside of the second threaded rod. The slider has a connecting groove at its bottom, and a connecting block with one end extending to the bottom of the slider is located inside the connecting groove. The laser rangefinder is located at the bottom of the connecting block. Rectangular blocks are located below the mounting block on both sides of the slider. Rectangular grooves are provided on opposite sides of the two rectangular blocks. A third threaded rod with one end extending into the two rectangular grooves is provided on opposite sides of the two rectangular blocks. The connecting block has positioning grooves on both sides. Positioning blocks with one end threaded to the outside of the two third threaded rods and the other end extending into the two positioning grooves are provided inside the two rectangular grooves. Knobs are provided on opposite sides of the two third threaded rods. Limiting grooves are provided at the bottom of the two positioning blocks. Limiting assemblies with one end extending into the two limiting grooves are provided at the bottom of the two rectangular blocks.

[0007] Preferably, the first drive assembly includes a first servo motor, the first servo motor is fixedly mounted on the left front end of the rectangular frame, a drive gear is fixedly mounted on the output shaft of the first servo motor, and a driven gear located on the front side of the rectangular frame and meshing with the drive gear at one end is fixedly mounted on the outer side of the first threaded rod.

[0008] Preferably, the second drive assembly includes a second servo motor, the second servo motor is fixedly mounted on the top of the mounting block, the output shaft of the second servo motor extends into the interior of the slide groove and is fixedly mounted with a drive bevel gear, and a driven bevel gear located on the right side of the slider and meshing with the drive bevel gear at one end is fixedly mounted on the outer side of the second threaded rod.

[0009] Preferably, the limiting component includes limiting blocks, with a limiting block movably installed at the bottom of each of the two rectangular blocks, one end of which extends into the two limiting grooves respectively. A circular block is fixedly installed at the bottom of each of the two limiting blocks, and a limiting spring is fixedly installed at the top of each of the two circular blocks, which is located outside the two limiting blocks respectively and has one end fixedly connected to the bottom of the two rectangular blocks respectively.

[0010] Preferably, a first bearing is fixedly installed on the rear side of the inner wall of the rectangular frame, and the first threaded rod is rotatably connected to the rear side of the inner wall of the rectangular frame through the first bearing. The movable block has a first threaded hole that matches the first threaded rod inside.

[0011] Preferably, a second bearing is fixedly installed on both the left and right sides of the inner wall of the slide groove, the second threaded rod is rotatably connected to the inner wall of the slide groove through the second bearing, and a second threaded hole adapted to the second threaded rod is opened inside the slider.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, this utility model provides a universal cylindrical mirror generatrix measuring device, which has the following beneficial effects:

[0014] 1. This universal cylindrical mirror busbar measuring device automatically adjusts the measuring position of the laser rangefinder by activating a first servo motor and a second servo motor. The first servo motor drives a drive gear to rotate, which in turn drives a first threaded rod to rotate via a driven gear. During the rotation of the first threaded rod, the moving block and the laser rangefinder move forward or backward as a whole. The second servo motor drives a drive bevel gear to rotate, which in turn drives a second threaded rod to rotate via a driven bevel gear. During the rotation of the second threaded rod, the slider and the laser rangefinder move left or right as a whole. By coordinating the left-right and forward-backward movements of the laser rangefinder, the device automatically adjusts the measuring position of the laser rangefinder, eliminating the need for manual movement and thus simplifying the user experience.

[0015] 2. This universal cylindrical mirror busbar measuring device moves two circular blocks downwards to move two limiting blocks out of their respective limiting slots, thus releasing the positional restriction on the two positioning blocks. Then, two knobs can be turned to rotate two third threaded rods, causing the two positioning blocks to move in opposite directions and out of their respective positioning slots, thereby releasing the fixing of the connecting block. The connecting block can then be pulled downwards from the connecting slot to disassemble the laser rangefinder, facilitating inspection, maintenance, or replacement of the laser rangefinder. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structure of this utility model;

[0017] Figure 2 is a partial top sectional view of the rectangular frame of this utility model;

[0018] Figure 3 is an enlarged view of point A in Figure 1 of this utility model.

[0019] In the diagram: 1. Base plate, 2. Cylindrical mirror, 3. Fixing block, 4. Electric telescopic rod, 5. Clamping plate, 6. Rectangular frame, 7. First threaded rod, 8. Moving block, 9. First drive assembly, 91. First servo motor, 92. Drive gear, 93. Driven gear, 10. Mounting block, 11. Slide groove, 12. Second threaded rod, 13. Slider, 14. Second drive assembly, 141. Second servo motor, 142. Drive bevel gear, 143. Driven bevel gear, 15. Connecting groove, 16. Connecting block, 17. Laser rangefinder, 18. Rectangular block, 19. Rectangular groove, 20. Third threaded rod, 21. Positioning groove, 22. Positioning block, 23. Knob, 24. Limiting groove, 25. Limiting assembly, 251. Limiting block, 252. Circular block, 253. Limiting spring. Detailed Implementation

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

[0021] Please refer to Figures 1-3. This utility model provides a technical solution: a general-purpose cylindrical mirror busbar measuring device, including a base plate 1 and a laser rangefinder 17. A cylindrical mirror 2 is placed on the top of the base plate 1. Two fixing blocks 3 are fixedly installed on the top of the base plate 1 and are located on the left and right sides of the cylindrical mirror 2, respectively. An electric telescopic rod 4 is fixedly installed on the opposite side of the two fixing blocks 3. The electric telescopic rod 4 can be of model SKD61. The output ends of the two electric telescopic rods 4 extend to the opposite side of the two fixing blocks 3 and are fixedly installed with a clamping plate 5, one end of which is respectively attached to the left and right sides of the cylindrical mirror 2.

[0022] A rectangular frame 6 is fixedly installed on the top of the base plate 1, located to the right of the right electric telescopic rod 4. A first threaded rod 7 is movably installed on the rear side of the inner wall of the rectangular frame 6, with one end extending to its front side. A movable block 8 is movably installed inside the rectangular frame 6, with one end threadedly connected to the outer side of the first threaded rod 7 and the other end extending to the top of the rectangular frame 6. A first bearing is fixedly installed on the rear side of the inner wall of the rectangular frame 6. The first threaded rod 7 is rotatably connected to the rear side of the inner wall of the rectangular frame 6 through the first bearing. A first threaded hole adapted to the first threaded rod 7 is opened inside the movable block 8.

[0023] A first drive assembly 9 is fixedly installed on the left front end of the rectangular frame 6, with one end fixedly connected to the outside of the first threaded rod 7. The first drive assembly 9 includes a first servo motor 91. The first servo motor 91 is fixedly installed on the left front end of the rectangular frame 6. The model of the first servo motor 91 can be I HSS57-36-20. A drive gear 92 is fixedly installed on the output shaft of the first servo motor 91. A driven gear 93 located on the front side of the rectangular frame 6 and with one end meshing with the drive gear 92 is fixedly installed on the outside of the first threaded rod 7.

[0024] A mounting block 10 is fixedly installed on the top of the movable block 8, with one end extending above the cylindrical mirror 2. A sliding groove 11 is provided on the bottom left side of the mounting block 10. A second threaded rod 12 is movably installed between the left and right sides of the inner wall of the sliding groove 11. A slider 13 is movably installed on the left side of the inner wall of the sliding groove 11, with one end threaded to the outer side of the second threaded rod 12 and the other end extending to the bottom of the mounting block 10. Second bearings are fixedly installed on both the left and right sides of the inner wall of the sliding groove 11. The second threaded rod 12 is rotatably connected to the inner wall of the sliding groove 11 through the second bearings. A second threaded hole that matches the second threaded rod 12 is provided inside the slider 13.

[0025] A second drive assembly 14 is fixedly mounted on the top of the mounting block 10, with one end extending into the interior of the slide groove 11 and fixedly connected to the outside of the second threaded rod 12. The second drive assembly 14 includes a second servo motor 141. The second servo motor 141 is fixedly mounted on the top of the mounting block 10. The model of the second servo motor 141 can be YB2-315S-6-70. The output shaft of the second servo motor 141 extends into the interior of the slide groove 11 and is fixedly mounted with a drive bevel gear 142. A driven bevel gear 143 located on the right side of the slider 13 and meshing with the drive bevel gear 142 is fixedly mounted on the outside of the second threaded rod 12.

[0026] A connecting groove 15 is provided at the bottom of the slider 13. A connecting block 16 extending to the bottom of the slider 13 is movably installed inside the connecting groove 15. The top of the connecting block 16 fits against the inner top wall of the connecting groove 15. A laser rangefinder 17 is fixedly installed at the bottom of the connecting block 16. The laser rangefinder 17 can be model VL53L0. Rectangular blocks 18 located below the mounting block 10 are fixedly installed on both the left and right sides of the slider 13. Rectangular grooves 19 are provided on the opposite sides of the two rectangular blocks 18. A third threaded rod 20, with one end extending into the interior of each of the two rectangular grooves 19, is movably installed on the opposite sides of the two rectangular blocks 18. Two rectangular blocks 18 each have a circular hole on their opposite sides, and a third bearing is fixedly installed inside each of the two circular holes. The third threaded rod 20 is rotatably connected to the rectangular block 18 through the third bearing. The connecting block 16 has a positioning groove 21 on both the left and right sides. The two rectangular grooves 19 each have a positioning block 22, one end of which is threaded to the outside of the two third threaded rods 20 and the other end of which extends into the two positioning grooves 21. The opposite sides of the two positioning blocks 22 each have a threaded groove that is adapted to the two third threaded rods 20. The opposite sides of the two third threaded rods 20 each have a knob 23 fixedly installed.

[0027] Each of the two positioning blocks 22 has a limiting groove 24 at its bottom. Each of the two rectangular blocks 18 has a limiting component 25 fixedly installed at its bottom, with one end extending into the two limiting grooves 24 respectively. The limiting component 25 includes a limiting block 251. Each of the two rectangular blocks 18 has a limiting block 251 movably installed at its bottom, with one end extending into the two limiting grooves 24 respectively. Each of the two limiting blocks 251 has a circular block 252 fixedly installed at its bottom. Each of the two circular blocks 252 has a limiting spring 253 fixedly installed at its top, located outside the two limiting blocks 251 respectively, with one end fixedly connected to the bottom of the two rectangular blocks 18 respectively.

[0028] All electrical components mentioned in this article are connected to an external controller and 220V AC mains power. The external controller can be a conventional known device such as a computer. The control circuit of the external controller can be implemented by a person skilled in the art through simple programming. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0029] In use, the cylindrical mirror 2 to be tested is placed on top of the base plate 1 and positioned between the two clamping plates 5. Then, the two electric telescopic rods 4 are activated via an external controller to move the two clamping plates 5 relative to each other, thereby clamping and fixing the cylindrical mirror 2. Next, the first servo motor 91, the second servo motor 141, and the laser rangefinder 17 are activated via the external controller. The first servo motor 91 drives the drive gear 92 to rotate, which in turn drives the first threaded rod 7 to rotate via the driven gear 93. During rotation, the first threaded rod 7 causes the moving block 8 and the laser rangefinder 17 to move forward or backward as a whole. The second servo motor 141 drives the drive bevel gear 142 to rotate, which in turn drives the second threaded rod 12 to rotate via the driven bevel gear 143. During rotation, the second threaded rod 12 causes the slider 13 and the laser rangefinder 17 to move left or right as a whole. This allows the laser rangefinder 17 to move left and right and forward and backward in a coordinated manner. The laser rangefinder 17 is adjusted to measure the height of the top generatrix of the cylindrical mirror 2 to check its dimensions and determine its quality. When the laser rangefinder 17 needs maintenance or replacement, the two circular blocks 252 can be pulled to move the two limiting blocks 251 downwards, allowing them to move out of the two limiting slots 24 and release the position restriction on the two positioning blocks 22. Then, the two knobs 23 can be turned to rotate the two third threaded rods 20, causing the two positioning blocks 22 to move in opposite directions and move out of the two positioning slots 21, thus releasing the fixation on the connecting block 16. The connecting block 16 can then be pulled out of the connecting slot 15 to remove the laser rangefinder 17, facilitating maintenance or replacement.

[0030] In summary, this universal cylindrical mirror busbar measuring device automatically adjusts the measuring position of the laser rangefinder 17 by activating the first servo motor 91 and the second servo motor 141. The first servo motor 91 drives the drive gear 92 to rotate, which in turn drives the first threaded rod 7 to rotate via the driven gear 93. During the rotation of the first threaded rod 7, the moving block 8 and the laser rangefinder 17 move forward or backward as a whole. The second servo motor 141 drives the drive bevel gear 142 to rotate, which in turn drives the second threaded rod 12 to rotate via the driven bevel gear 143. During the rotation of the second threaded rod 12, the slider 13 and the laser rangefinder 17 move left or right as a whole. By coordinating the left-right and forward-backward movements of the laser rangefinder 17, the measuring position of the laser rangefinder 17 is automatically adjusted, eliminating the need for manual movement and thus simplifying the user experience. Furthermore, pulling the two circular blocks 252 drives the two limit blocks 251. Move downwards to allow the two limiting blocks 251 to move out of the two limiting grooves 24 respectively, thereby releasing the position restriction on the two positioning blocks 22. At this time, turn the two knobs 23 to drive the two third threaded rods 20 to rotate, thereby driving the two positioning blocks 22 to move in opposite directions, so that the two positioning blocks 22 move out of the two positioning grooves 21 respectively, thereby releasing the fixation on the connecting block 16. Then, pull the connecting block 16 downwards from the inside of the connecting groove 15, and the laser rangefinder 17 can be disassembled, which facilitates the inspection, maintenance or replacement of the laser rangefinder 17. This solves the problem that in the actual use of existing cylindrical mirror busbar measuring devices, most of them are measured by manually moving the laser rangefinder to measure the busbar of the cylindrical mirror, which is cumbersome and not conducive to use. Secondly, the laser rangefinders on existing measuring devices are mostly fixed installations, which are not easy to disassemble, making it inconvenient to inspect, maintain or replace the laser rangefinder.

[0031] It should 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," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A general-purpose cylindrical mirror busbar measuring device, comprising a base plate (1) and a laser rangefinder (17), wherein a cylindrical mirror (2) is disposed on the top of the base plate (1), and two fixing blocks (3) are disposed on the top of the base plate (1) respectively located on the left and right sides of the cylindrical mirror (2), and electric telescopic rods (4) are disposed on opposite sides of the two fixing blocks (3), and the output ends of the two electric telescopic rods (4) extend to the opposite sides of the two fixing blocks (3) and are provided with clamps (5) with one end respectively attached to the left and right sides of the cylindrical mirror (2), characterized in that: The top of the base plate (1) is provided with a rectangular frame (6) located to the right of the right electric telescopic rod (4). A first threaded rod (7) extending to its front end is provided on the rear inner wall of the rectangular frame (6). Inside the rectangular frame (6) is a moving block (8) with one end threaded to the outside of the first threaded rod (7) and the other end extending to the top of the rectangular frame (6). A first drive assembly (9) with one end fixedly connected to the outside of the first threaded rod (7) is provided at the front left side of the rectangular frame (6). The top of the moving block (8) is provided with a component extending to the cylindrical mirror (…). 2) The mounting block (10) above has a groove (11) on the bottom left side. A second threaded rod (12) is provided between the left and right sides of the inner wall of the groove (11). A slider (13) is provided on the inner left side of the groove (11), with one end threaded to the outer side of the second threaded rod (12) and the other end extending to the bottom of the mounting block (10). A second drive assembly (14) is provided on the top of the mounting block (10), with one end extending into the groove (11) and fixedly connected to the outer side of the second threaded rod (12). The slider (13) A connecting groove (15) is provided at the bottom, and a connecting block (16) extending to the bottom of the slider (13) is provided inside the connecting groove (15). The laser rangefinder (17) is located at the bottom of the connecting block (16). Rectangular blocks (18) located below the mounting block (10) are provided on both the left and right sides of the slider (13). Rectangular grooves (19) are provided on opposite sides of the two rectangular blocks (18). A third threaded rod (20) extending into the two rectangular grooves (19) is provided on the opposite sides of the two rectangular blocks (18). Positioning grooves (21) are provided on both the left and right sides of the block (16). A positioning block (22) is provided inside each of the two rectangular grooves (19), with one end threaded to the outside of the two third threaded rods (20) and the other end extending into the two positioning grooves (21). A knob (23) is provided on the opposite side of the two third threaded rods (20). A limiting groove (24) is provided at the bottom of each of the two positioning blocks (22). A limiting component (25) is provided at the bottom of each of the two rectangular blocks (18), with one end extending into the two limiting grooves (24).

2. The universal cylindrical mirror generatrix measuring device according to claim 1, characterized in that: The first drive assembly (9) includes a first servo motor (91). The first servo motor (91) is fixedly installed on the left front end of the rectangular frame (6). The output shaft of the first servo motor (91) is fixedly installed with a drive gear (92). The outer side of the first threaded rod (7) is fixedly installed with a driven gear (93) located on the front side of the rectangular frame (6) and one end meshing with the drive gear (92).

3. The universal cylindrical lens generatrix measuring device according to claim 1, characterized in that: The second drive assembly (14) includes a second servo motor (141), which is fixedly mounted on the top of the mounting block (10). The output shaft of the second servo motor (141) extends into the interior of the slide groove (11) and is fixedly mounted with a drive bevel gear (142). A driven bevel gear (143) located on the right side of the slider (13) and meshing with the drive bevel gear (142) is fixedly mounted on the outside of the second threaded rod (12).

4. The universal cylindrical lens generatrix measuring device according to claim 1, characterized in that: The limiting component (25) includes a limiting block (251). The bottom of each of the two rectangular blocks (18) is movably mounted with a limiting block (251) extending into the two limiting grooves (24) respectively. The bottom of each of the two limiting blocks (251) is fixedly mounted with a circular block (252). The top of each of the two circular blocks (252) is fixedly mounted with a limiting spring (253) located outside the two limiting blocks (251) respectively and whose one end is fixedly connected to the bottom of the two rectangular blocks (18).

5. The universal cylindrical lens generatrix measuring device according to claim 1, characterized in that: The first bearing is fixedly installed on the rear side of the inner wall of the rectangular frame (6), and the first threaded rod (7) is rotatably connected to the rear side of the inner wall of the rectangular frame (6) through the first bearing. The interior of the moving block (8) is provided with a first threaded hole that is compatible with the first threaded rod (7).

6. The universal cylindrical mirror generatrix measuring device according to claim 1, characterized in that: The inner wall of the slide groove (11) is fixedly installed with second bearings on both the left and right sides. The second threaded rod (12) is rotatably connected to the inner wall of the slide groove (11) through the second bearings. The slider (13) has a second threaded hole that matches the second threaded rod (12) inside.