Anti-interference reflector rotating mechanism and use method

Abstract

The invention belongs to the technical field of external cavity reflectors, and particularly relates to an anti-interference reflector rotating mechanism and a using method, and the anti-interference reflector rotating mechanism 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 part of the flexible hinge structure is provided with a rotating shaft, and the other end is provided with a reflector; bearing seats are arranged at the two ends of the rotating shaft respectively, and the corundum balls are located in the bearing seats and abut against the bearing seats; a spring is arranged in the flexible hinge structure; a gap is formed in one end, provided with the rotating shaft, of the flexible hinge structure; and the bearing ball seat is positioned in the rotating shaft mounting base. The invention has the advantages that the clearance between the rotating shaft and the bearing is eliminated, the non-mold-adjustment index of the outer cavity is easier to realize, and the assembly and adjustment efficiency of the outer cavity can be improved by more than 50%.

Description

Technical Field

[0001] The present application belongs to the technical field of external cavity reflectors, and specifically relates to an anti-interference reflector rotation mechanism and a use method thereof. Background Art

[0002] In the prior art, there are two main ways to adjust the external cavity reflector: First, the motor directly drives the reflector to rotate. For direct drive, due to the high requirements for the rotation accuracy of the reflector, the motor used has the disadvantages of large size, need to be imported, and high cost. Second, the motor indirectly drives the reflector to rotate through a transfer structure. For indirect drive, the transfer structure needs to use bearings. Currently, the existing technology mostly uses deep groove ball bearings, and there is an irremovable gap between the roller and the ring of the bearing. The disadvantage of this solution is that it does not have anti-interference ability, and the vibration factors of the external environment have a great impact on the rotation accuracy of the reflector. Summary of the invention

[0003] Aiming at the shortcomings of indirect drive, the present invention redesigns an anti-interference mirror rotation mechanism, which has anti-interference ability and zero clearance characteristics. During the influence of external environmental vibration factors, it can resist the influence of external environmental vibration factors; after the influence of external environmental vibration factors ends, the mirror rotation mechanism can quickly return to its original position. Its technical solution is:

[0004] An anti-interference reflector rotation mechanism comprises a driving arm, a reflector, a corundum ball, a bearing ball seat, a flexible hinge structure and a rotating shaft mounting base; a rotating shaft is arranged inside the flexible hinge structure, and a reflector is arranged on the end surface of the flexible hinge structure; bearing seats are arranged at both ends of the rotating shaft, the corundum ball is located in the bearing ball seat and abuts against the bearing seat; a spring is arranged inside the flexible hinge structure; a gap is arranged at one end of the flexible hinge structure where the rotating shaft is mounted; the bearing ball seat is located in the rotating shaft mounting base.

[0005] Preferably, a spring installation groove is provided on the flexible hinge structure, a guide column is provided in the spring installation groove, and the spring is installed on the guide column and is located in the spring installation 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 to the spring mounting groove.

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

[0008] Preferably, the bearing ball seat is a concave structure, and the corundum ball is located in 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 the adjustment is completed, the glue is dispensed and cured, so that the flexible hinge structure meets the requirements of sleeves with different size tolerances.

[0009] Preferably, the rotating shaft mounting base is a concave structure, and the raised parts at both ends are provided with threaded holes for mounting the bearing ball seats.

[0010] Preferably, the corundum balls and the bearing ball seats are both manufactured by optical glass grinding technology; the two bearing ball seats equipped with the corundum balls serve as stators, and the shaft sleeves serve as movers. The driving arm is pushed by an external driving device, so that the reflector rotates around the axis to achieve output of different wavelengths.

[0011] Preferably, after the rotating shaft is installed on the rotating shaft mounting base, the rotating shaft structure is simultaneously subjected to the pressure of the corundum balls on both sides and the pressure of the compression spring, and the two pressures remain balanced, so that the spherical surface of the corundum ball always maintains close contact with the conical groove of the bearing seat; when the rotating shaft structure is disturbed by external environmental vibration, the pressure of the spring will prompt the bearing seat to quickly contact the corundum ball and restore the position before the interference.

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

[0013] S1. The slide seat equipped with the piezoelectric ceramic is moved by an external driving device to push the driving arm, which drives the sleeve to rotate, thereby rotating the reflector 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 balanced, so that the spherical surface of the corundum ball always maintains linear contact with the conical groove of the bearing seat. When the shaft structure is disturbed by external environmental vibration, the pressure of the compression spring will prompt the conical corundum bearing seat to quickly contact the corundum ball and restore the position before the disturbance.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Low cost. Compared with the direct drive solution, the whole solution can reduce the cost by more than 95% and there is no risk; compared with the existing indirect drive solution, the cost can be reduced by more than 50%.

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

[0018] 3. 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 and the corundum ball to fit closely together to eliminate interference.

[0019] 4. Compared with the existing indirect drive solution, the clearance of the rotating shaft bearing is eliminated, making it easier to achieve the non-adjustment index of the outer cavity, so that the adjustment efficiency of the outer cavity can be increased by more than 50%. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the overall picture of the applicant organization.

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

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

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

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

[0025] Figure 6 It is a schematic diagram of the shaft offset in the prior art.

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

[0027] Figure 8 This is a three-dimensional diagram of this application.

[0028] In the figure, 1-driving arm, 2-rotating shaft, 3-reflecting mirror; 4-sleeve, 5-flexible hinge structure, 6-corundum ball, 7-bearing ball seat, 8-conical corundum bearing seat, 9-guide column, 10-spring, 11-rotating shaft mounting base, 12-interval. DETAILED DESCRIPTION

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

[0030] The present invention belongs to the indirect drive scheme of the motor. The present invention uses a conical corundum bearing seat and a corundum ball in pairs as a bearing to replace the ball bearing in the existing scheme.

[0031] The corundum ball and the conical corundum bearing seat are both made by optical glass grinding technology, which is mature, low-cost and high-precision. The two bearing seats with corundum balls are used as stators, and the sleeve with conical corundum bearing seats is used as a mover. The motor drives the slide seat with piezoelectric ceramics to move, pushing the drive arm, so that the reflector rotates around the axis (such as Figure 1 , 2 , 6, 7).

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

[0033] The positions of the two corundum balls 6 are adjusted through the threads of the bearing ball seat 7. After the adjustment, the glue is solidified so that the mechanism can meet the requirements of the shaft sleeves with different size tolerances. The spring 10 (compression spring) between the two conical corundum bearing seats 8 is used to eliminate the gap between the corundum ball 6 and the conical corundum bearing seat 8, while not hindering the rotation between the corundum ball 6 and the bearing ball seat 7. The entire assembly process does not require special assembly means such as high and low temperatures, does not require tooling for the bearing press-in operation, and does not have a defective rate. The assembly process is simple and efficient.

[0034] The flexible hinge structure 5 is provided with a spring installation groove, a guide column 9 is provided in the spring installation groove, and the spring 10 is installed on the guide column 9 and is located in the spring installation 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 to the spring installation groove.

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

[0037] The conical corundum bearing seat 8 is a conical groove structure, and the corundum ball 6 is located in the conical groove structure of the bearing; an adjustment thread is provided on the outer wall of the bearing ball seat 7, and the position of the corundum ball is adjusted by adjusting the thread. After the adjustment is completed, the glue is dispensed and cured, so that the flexible hinge structure can meet the requirements of sleeves with different size tolerances.

[0038] The corundum ball 6 and the conical corundum bearing seat 8 are both made by optical glass grinding technology; the two bearing ball seats 7 with the corundum ball 6 are installed as stators, and the sleeve 4 is used as a mover. The driving arm 1 is pushed by an external driving device, so that the reflector 3 rotates around the axis to achieve output of different wavelengths.

[0039] The rotating shaft installation base is a concave structure, and the raised parts at both ends are provided with threaded holes, which are matched and connected with the adjusting threads on the bearing ball seat.

[0040] The combination of the corundum ball 6 and the bearing ball seat 7 is installed on the shaft mounting base 11 through threads, and is fixed with an adjusting thread on the outer wall of the bearing ball seat 7. 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 balanced so that the spherical surface of the corundum ball is always in close contact with the conical groove of the conical corundum bearing seat 8; when the shaft structure is disturbed by external environmental vibration, the pressure of the spring will prompt the bearing seat to quickly contact the corundum ball and restore the position before the disturbance.

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

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

[0043] A method for using an anti-interference reflector rotation mechanism, characterized in that it comprises the following steps:

[0044] S1. The slide seat equipped with the piezoelectric ceramic is moved by an external driving device to push the driving arm, which drives the sleeve to rotate, thereby rotating the reflector around the axis;

[0045] S2. 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 balanced, so that the spherical surface of the corundum ball always maintains linear contact with the conical groove of the conical corundum bearing seat. When the rotating shaft structure is disturbed by external environmental vibration, the pressure of the compression spring will prompt the conical corundum bearing seat to quickly contact with the corundum ball and restore the position before the disturbance.

[0046] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one 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 present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anti-interference mirror rotation mechanism, characterized in that: It includes a driving arm, a reflector, a corundum ball, a bearing ball seat, a flexible hinge structure and a rotating shaft mounting base; a rotating shaft is arranged inside the flexible hinge structure, and a reflector is arranged on the end surface of the flexible hinge structure; bearing seats are arranged at both ends of the rotating shaft, the corundum ball is located in the bearing ball seat and rests on the bearing seat; a spring is arranged inside the flexible hinge structure; a gap is arranged at one end of the flexible hinge structure where the rotating shaft is mounted; the bearing ball seat is located in the rotating shaft mounting base.

2. The anti-interference mirror rotation mechanism according to claim 1, characterized in that: The flexible hinge structure is provided with a spring installation slot, a guide column is provided in the spring installation slot, and the spring is installed on the guide column and is located in the spring installation slot and is in a pre-tightened state.

3. The anti-interference mirror rotation mechanism according to claim 1, characterized in that: The gap width is 1-2 mm and extends from one end of the flexible hinge structure to the spring installation groove.

4. The anti-interference mirror rotation mechanism according to claim 1, characterized in that: The rotating shaft is provided with a shaft sleeve, and the bearing seat is a conical structure with a conical surface angle of 85±5° and is made of corundum.

5. The anti-interference mirror rotation mechanism according to claim 1 is characterized in that: The bearing ball seat is a concave structure, and the corundum ball is located in the concave structure of the bearing ball seat; the bearing ball seat is provided with an adjusting thread, and the position of the corundum ball is adjusted by adjusting the thread. After the adjustment is completed, the glue is dispensed and cured, so that the flexible hinge structure meets the requirements of sleeves with different size tolerances.

6. The anti-interference mirror rotation mechanism according to claim 5 is characterized in that: The rotating shaft mounting base is a concave structure, and the raised parts at both ends are provided with threaded holes for mounting the bearing ball seats.

7. An anti-interference mirror rotation mechanism according to claims 1-6, characterized in that: The corundum balls and the bearing ball seats are both made by optical glass grinding technology; the two bearing ball seats equipped with the corundum balls are used as stators, and the shaft sleeves are used as movers. The driving arm is pushed by an external driving device, so that the reflector rotates around the axis to achieve output of different wavelengths.

8. An anti-interference mirror rotation mechanism according to claims 1-6, characterized in that: The shaft is installed inside the shaft; after installation on the base, the shaft structure is simultaneously subjected to the pressure of the corundum balls on both sides and the pressure of the compression spring, and the two pressures remain balanced, so that the spherical surface of the corundum ball always maintains 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 prompt the bearing seat to quickly contact the corundum ball and restore the position before the disturbance.

9. A method for using an anti-interference mirror rotation mechanism, characterized in that: The following steps are involved: S1. The slide seat equipped with the piezoelectric ceramic is moved by an external driving device to push the driving arm, which drives the sleeve to rotate, thereby rotating the reflector around the axis; 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 balanced, so that the spherical surface of the corundum ball always maintains linear contact with the conical groove of the bearing seat. When the shaft structure is disturbed by external environmental vibration, the pressure of the compression spring will prompt the bearing seat to quickly contact the corundum ball and restore the position before the disturbance.

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