Anti-interference mirror rotating mechanism and method of use

Abstract

The application belongs to the technical field of external cavity reflectors, and particularly relates to an anti-interference reflector rotating mechanism and a use method, which comprises a driving arm, a reflector, a corundum ball, a bearing ball seat, a flexible hinge structure and a rotating shaft mounting base. One end of the flexible hinge structure is provided with a rotating shaft, and the other end is provided with the reflector. The rotating shaft is provided with bearing seats at two ends. The corundum ball is located in the bearing ball seat and abuts against the bearing seat. The flexible hinge structure is provided with a spring. One end of the flexible hinge structure provided with the rotating shaft is provided with a gap. The bearing ball seat is located in the rotating shaft mounting base. The mechanism has the advantages that the gap of the rotating shaft bearing is eliminated, the external cavity is easier to realize the non-adjusting mode index, and the adjustment efficiency of the external cavity can be improved by more than 50%.

Description

An anti-interference reflector rotation mechanism and its usage method Technical Field

[0001] This application belongs to the field of external cavity reflector technology, specifically relating to an anti-interference reflector rotation mechanism and its usage method. Background Technology

[0002] In existing technologies, there are two main methods for adjusting the external cavity reflector: First, the reflector is directly driven by a motor. Direct drive, due to the high precision requirements of the reflector's rotation, suffers from disadvantages such as large size, reliance on imported motors, and high cost. Second, the reflector is indirectly driven by a motor through an intermediate structure. Indirect drive requires bearings in the intermediate structure; current technologies often use deep groove ball bearings, which have unavoidable clearances between the rollers and raceways. The disadvantage of this approach is its lack of interference resistance; external environmental vibrations significantly affect the reflector's rotational precision. Summary of the Invention

[0003] This invention addresses the shortcomings of indirect drive by redesigning an anti-interference mirror rotation mechanism, which possesses anti-interference capabilities and zero backlash characteristics. It can resist the influence of external environmental vibrations; and after the vibrations subside, the mirror rotation mechanism can quickly return to its original position. The technical solution is as follows:

[0004] An anti-interference reflector rotation mechanism includes a drive arm, a reflector, a corundum ball, a bearing ball seat, a flexible hinge structure, and a rotating shaft mounting base. The flexible hinge structure has a rotating shaft inside, with a reflector on its end face. Bearing seats are located at both ends of the rotating shaft, and the corundum ball is located within and abuts against the bearing seat. A spring is installed within the flexible hinge structure. A gap is provided at one end of the flexible hinge structure that mounts the rotating shaft. The bearing ball seat is located within the rotating shaft mounting base.

[0005] Preferably, the flexible hinge structure is provided with a spring mounting groove, a guide post is provided in the spring mounting groove, and the spring is mounted on the guide post, located in the spring mounting groove, and is in a pre-tightened state.

[0006] Preferably, the gap width is 1-2 mm, extending from one end of the flexible hinge structure into the spring mounting groove.

[0007] Preferably, the rotating shaft is provided with a bushing, and the bearing seat is a conical structure with a conical surface angle of 85±5°, and is made of corundum material.

[0008] Preferably, the bearing seat has a concave structure, and the corundum ball is located within the concave structure of the bearing seat; the bearing seat is provided with an adjustment thread, and the position of the corundum ball is adjusted by adjusting the thread. After adjustment, the adhesive is applied and cured, so that the flexible hinge structure can meet the bushings with different dimensional tolerances.

[0009] Preferably, the rotating shaft mounting base has a concave structure, with threaded holes on the protruding parts at both ends for mounting bearing ball seats.

[0010] Preferably, both the corundum ball and the bearing seat are manufactured using optical glass grinding technology; the two bearing seats with the corundum ball installed serve as stators, and the bushing serves as a mover. An external drive device drives the drive arm, thereby causing the reflector to rotate around the axis and achieve output of different wavelengths.

[0011] Preferably, after the shaft is installed on the shaft mounting base, the shaft structure is simultaneously subjected to the pressure of the corundum balls on both sides and the pressure of the compression spring. The two pressures are kept in balance, so that the spherical surface of the corundum ball always keeps in close contact with the tapered groove of the bearing seat. When the shaft structure is disturbed by external environmental vibration, the pressure of the spring will cause the bearing seat to quickly contact the corundum ball and restore the position before the disturbance.

[0012] A method for using an anti-interference reflector rotation mechanism includes the following steps:

[0013] S1. An external drive device moves the slide block equipped with piezoelectric ceramics, which in turn drives the drive arm. The drive arm drives the bushing to rotate, thereby causing the reflector to rotate around the axis.

[0014] S2. The shaft structure is simultaneously subjected to the pressure of the corundum balls on both sides and the pressure of the compression spring. The two pressures are kept in balance, so that the spherical surface of the corundum ball always maintains line contact with the tapered groove of the bearing seat. When the shaft structure is disturbed by external environmental vibration, the pressure of the compression spring will cause the tapered corundum bearing seat to quickly contact the corundum ball and restore the position before the disturbance.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] 1. Low cost. Compared to direct drive solutions, the overall solution can reduce costs by more than 95%; compared to existing indirect drive solutions, costs can be reduced by more than 50%.

[0017] 2. The assembly process is simple and the yield rate is high. Compared with existing indirect drive solutions, it only requires the corresponding parts to be installed step by step, without the need for special tooling fixtures or special assembly processes, and the yield rate can reach 100%.

[0018] 3. It has anti-interference characteristics. When the shaft is disturbed by external vibration factors, the pressure of the compression spring will cause the conical corundum bearing seat to fit tightly with the corundum ball, thus eliminating the interference.

[0019] 4. Compared with the existing indirect drive scheme, the clearance of the shaft bearing is eliminated, making it easier to achieve the mold-free adjustment index of the outer cavity and improving the assembly and adjustment efficiency of the outer cavity by more than 50%. Attached Figure Description

[0020] Figure 1 shows the overall structure of the applicant organization.

[0021] Figure 2 is a top view of the applicant's organization.

[0022] Figure 3 is a cross-sectional view of the rotating shaft of this application.

[0023] Figure 4 is a schematic diagram of the installation and force distribution of the rotating shaft in this application.

[0024] Figure 5 is a schematic diagram of the anti-interference of the rotating shaft in this application.

[0025] Figure 6 is a schematic diagram of the existing technology of shaft offset.

[0026] Figure 7 is a schematic diagram of the indirect drive technology in the prior art.

[0027] Figure 8 is a perspective view of this application.

[0028] In the diagram, 1-drive arm, 2-rotating shaft, 3-reflector; 4-shoulder sleeve, 5-flexible hinge structure, 6-corundum ball, 7-bearing ball seat, 8-conical corundum bearing seat, 9-guide post, 10-spring, 11-rotating shaft mounting base, 12-intermittent. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] This invention pertains to indirect motor drive solutions. By pairing a conical corundum bearing housing with corundum balls, this invention serves as a single bearing, replacing the ball bearings in existing solutions.

[0031] Both the corundum balls and the conical corundum bearing housings are manufactured using optical glass grinding technology, which is a mature, low-cost, and high-precision process. The two bearing housings with corundum balls serve as stators, and the bushing with the conical corundum bearing housing serves as a mover. A motor drives the slide with piezoelectric ceramic installed, which in turn moves the drive arm, causing the reflector to rotate around its axis (as shown in Figures 1, 2, 6, and 7).

[0032] As shown in Figures 1-5, an anti-interference reflector rotation mechanism includes a drive arm 1, a reflector 3, a corundum ball 6, a bearing ball seat 7, a flexible hinge structure 5, and a rotating shaft mounting base 11. The flexible hinge structure 5 has a rotating shaft 2 inside, with a reflector 3 on its end face. Bearing seats (conical corundum bearing seats 8) are provided at both ends of the rotating shaft 2. One side of the corundum ball 6 is located inside the bearing ball seat 7, and the other side abuts against the bearing seat (conical corundum bearing seat 8). A spring 10 is provided inside the flexible hinge structure 5. A gap 12 is provided at one end of the flexible hinge structure 5 where the rotating shaft 4 is mounted. The bearing ball seat 7 is located inside the rotating shaft mounting base 11.

[0033] The positions of the two corundum balls 6 are adjusted by threading the bearing housing 7. After adjustment, adhesive is applied and cured, allowing the mechanism to accommodate bushings with different dimensional tolerances. The spring 10 (compression spring) between the two conical corundum bearing housings 8 eliminates the gap between the corundum balls 6 and the conical corundum bearing housings 8 without hindering the rotation between the corundum balls 6 and the bearing housing 7. The entire assembly process does not require special assembly methods such as high and low temperatures, does not require tooling for pressing the bearings in, and has no defect rate. The assembly process is simple and highly efficient.

[0034] The flexible hinge structure 5 is provided with a spring mounting groove, and a guide post 9 is provided in the spring mounting groove. The spring 10 is mounted on the guide post 9, located in the spring mounting groove, and is in a pre-tightened state.

[0035] The gap 12 has a width of 1-2 mm and extends from one end of the flexible hinge structure 8 into the spring mounting groove.

[0036] The rotating shaft 2 is provided with a bushing 3, and the bearing seat is a conical structure with a conical surface angle of 85±5° and is made of corundum material.

[0037] The conical corundum bearing seat 8 has a conical groove structure, and the corundum ball 6 is located inside the conical groove structure of the bearing. The outer wall of the bearing ball seat 7 is provided with an adjustment thread. The position of the corundum ball is adjusted by adjusting the thread. After adjustment, the adhesive is applied and cured so that the flexible hinge structure can meet the bushings with different dimensional tolerances.

[0038] Both the corundum ball 6 and the conical corundum bearing seat 8 are manufactured using optical glass grinding technology; the two bearing seats 7 with the corundum ball 6 installed serve as stators, and the bushing 4 serves as movers. The drive arm 1 is driven by an external drive device, thereby causing the reflector 3 to rotate around the axis and achieve the output of different wavelengths.

[0039] The shaft mounting base has a concave structure, with threaded holes on the protruding parts at both ends, which are connected to the adjusting threads on the bearing ball seat.

[0040] The corundum ball 6 and the bearing ball seat 7 are assembled together and installed on the shaft mounting base 11 by threads. The bearing ball seat 7 is fixed by an adjusting thread on its outer side wall. The shaft 4 is simultaneously subjected to the pressure of the corundum balls on both sides and the pressure of the compression spring. The two pressures are kept in balance, so that the spherical surface of the corundum ball always keeps in close contact with the tapered groove of the conical corundum bearing seat 8. When the shaft structure is disturbed by external environmental vibration, the pressure of the spring will cause the bearing seat to quickly contact the corundum ball and restore the position before the disturbance.

[0041] As shown in Figure 4, after the rotating shaft 4 is installed on the rotating shaft mounting base 11, the rotating shaft structure is simultaneously subjected to the pressure of the corundum balls on both sides and the pressure of the compression spring. The two pressures are kept in balance, so that the spherical surface of the corundum ball always maintains line contact with the tapered groove of the conical corundum bearing seat, and there is no clearance in the bearings that exists in the existing indirect drive technology.

[0042] As shown in Figure 5, when the shaft structure is disturbed by external environmental vibration, the pressure of the compression spring will cause the conical corundum bearing seat to quickly contact the corundum ball and restore the position before the disturbance.

[0043] A method of using an anti-interference reflector rotation mechanism, characterized by comprising the following steps:

[0044] S1. An external drive device moves the slide block equipped with piezoelectric ceramics, which in turn drives the drive arm. The drive arm drives the bushing to rotate, thereby causing the reflector to rotate around the axis.

[0045] S2. The shaft structure is simultaneously subjected to the pressure of the corundum balls on both sides and the pressure of the compression spring. The two pressures are kept in balance, so that the spherical surface of the corundum ball always maintains line contact with the tapered groove of the conical corundum bearing seat. When the shaft structure is disturbed by external environmental vibration, the pressure of the compression spring will cause the conical corundum bearing seat to quickly contact the corundum ball and restore the position before the disturbance.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anti-interference reflector rotation mechanism, characterized in that, The device includes a drive arm, a reflector, a corundum ball, a bearing seat, a flexible hinge structure, and a rotating shaft mounting base. The flexible hinge structure houses a rotating shaft with a reflector on its end face. Bearing seats are located at both ends of the rotating shaft, and the corundum ball is positioned within and abuts against the bearing seat. A spring is installed within the flexible hinge structure. A gap is provided at one end of the flexible hinge structure where the rotating shaft is mounted. The bearing seat is located within the rotating shaft mounting base. After the rotating shaft is installed on the mounting base, the shaft structure is simultaneously subjected to pressure from the corundum balls on both sides and the spring. These two pressures remain balanced, ensuring that the spherical surface of the corundum ball remains in close contact with the tapered groove of the bearing seat. A bushing is provided on the rotating shaft. The two bearing seats with the corundum ball act as stators, and the bushing acts as a mover. An external drive device pushes the drive arm, causing the reflector to rotate around its axis, thus achieving different wavelength outputs.

2. The anti-interference reflector rotation mechanism according to claim 1, characterized in that, The flexible hinge structure is provided with a spring mounting groove, and a guide post is provided in the spring mounting groove. The spring is mounted on the guide post and located in the spring mounting groove, and is in a pre-tightened state.

3. The anti-interference reflector rotation mechanism according to claim 1, characterized in that, The gap width is 1-2mm, extending from one end of the flexible hinge structure into the spring mounting groove.

4. The anti-interference reflector rotation mechanism according to claim 1, characterized in that, The bearing housing has a conical structure with a conical surface angle of 85±5° and is made of corundum.

5. The anti-interference reflector rotation mechanism according to claim 1, characterized in that, The bearing ball seat has a concave structure, and the corundum ball is located inside the concave structure of the bearing ball seat; the bearing ball seat is provided with an adjustment thread, and the position of the corundum ball is adjusted by adjusting the thread. After adjustment, the adhesive is applied and cured, so that the flexible hinge structure can meet the bushings with different dimensional tolerances.

6. The anti-interference reflector rotation mechanism according to claim 5, characterized in that, The shaft mounting base has a concave structure, with threaded holes on the protruding parts at both ends for mounting bearing ball seats.

7. The anti-interference reflector rotation mechanism according to any one of claims 1-6, characterized in that, Both the corundum ball and the bearing seat are manufactured using optical glass grinding technology.

8. An anti-interference reflector rotation mechanism according to any one of claims 1-6, characterized in that; When the shaft structure is disturbed by external environmental vibration, the pressure of the spring will cause the bearing seat to quickly contact the corundum ball and restore the position before the disturbance.

9. A method of using an anti-interference reflector rotation mechanism, adapted to the anti-interference reflector rotation mechanism according to any one of claims 1-8, characterized in that, Includes the following steps: S1. An external drive device moves the slide block equipped with piezoelectric ceramics, pushing the drive arm, which in turn drives the bushing to rotate, thus causing the reflector to rotate around the axis. S2. The rotating shaft structure is simultaneously subjected to the pressure of the corundum balls on both sides and the pressure of the spring. The two pressures are kept in balance, ensuring that the spherical surface of the corundum ball always maintains line contact with the tapered groove of the bearing seat. When the rotating shaft structure is disturbed by external environmental vibration, the pressure of the spring will cause the bearing seat to quickly contact the corundum ball and restore the position before the disturbance.

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