Reflector switching mechanism and assembling and adjusting method

Abstract

The invention provides a reflector switching mechanism and an assembling and adjusting method, and relates to the technical field of optical sensor assembling and adjusting. The mechanism comprises a switching reflecting mirror, a switching reflecting mirror base used for installing the switching reflecting mirror, a bearing assembly used for providing a rotating shaft system for the switching reflecting mirror, a reflecting mirror switching bearing base used for fixing the bearing assembly, and a driven gear arranged at the shaft end of the switching reflecting mirror base in a sleeving mode. The switching gear limiting block is mounted on the driven gear; and the adsorption assembly is used for adjusting the contact position of the switching gear limiting block. The switching reflector mechanism provided by the invention can realize switching of light paths, has relatively high repeated positioning precision, and ensures the stability of an optical system.

Description

Technical Field

[0001] The invention relates to the technical field of optical sensor assembly and adjustment, and in particular provides a switching reflector mechanism and an assembly and adjustment method. Background Art

[0002] The airborne optoelectronic aiming system is equipped with an infrared thermal imager to realize nighttime search and aiming. Fixed reflectors are often used to fold the optical path multiple times to reduce the infrared volume. In order to reduce costs, a shared detector design is adopted for the two-way optical system containing an ultra-small field of view optical path and a continuous zoom optical path. The two optical systems switch the optical path by switching the reflector mechanism, and require a high repeat switching accuracy. The switching repeat accuracy of the switching reflector directly affects the imaging and optical axis deviation of the infrared two-way optical system. Summary of the invention

[0003] The purpose of the present application is to propose a switching reflector mechanism based on the current design of a shared detector for an infrared ultra-small field of view optical path and a continuous zoom optical path.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a switching reflector mechanism, which includes: a switching reflector, a switching reflector seat for installing the switching reflector, a bearing assembly for providing a rotating shaft system for the switching reflector, a reflector switching bearing seat for fixing the bearing assembly, a driven gear mounted on the shaft end of the switching reflector seat, a switching gear limit block installed on the driven gear, and an adsorption assembly for adjusting the contact position of the switching gear limit block.

[0005] The switching reflector mechanism provided by the present invention also has the following technical features: the switching reflector is mounted on the reference plane of the switching reflector seat, and the angle between the mirror surface of the switching reflector and the rotation axis is 45°.

[0006] The switching reflector mechanism provided by the present invention also has such technical features that the bearing assembly includes a bearing outer gasket unit installed in a switching reflector seat and a reflector switching bearing seat, a bearing inner pressure ring and a bearing outer pressure ring that fasten the bearing outer gasket unit by threads, a bearing, a bearing inner spacer and a bearing outer spacer arranged in the bearing, and a bearing inner gasket unit.

[0007] The switching reflector mechanism provided by the present invention also has the following technical features: the bearing outer gasket unit includes a plurality of bearing outer gaskets, and the bearing inner gasket unit includes a plurality of bearing inner gaskets.

[0008] The switching mirror mechanism provided by the present invention also has such technical features, that the adsorption assembly includes a magnetic bead bonded to the mounting hole on the switching mirror seat, a magnetic bead pressure plate fixed on the switching mirror seat, two adsorption screws and adsorption screw adjustment gaskets for adjusting the contact position of the switching gear limit block, and two adsorption screws for stabilizing the position of the switching mirror.

[0009] Another object of the present invention is to provide a method for adjusting a switchable reflector mechanism, the method for adjusting the reflector mechanism as described in any one of the above items comprising:

[0010] S1: Measure the bearing clearance, select the bearing inner gasket and the bearing outer gasket, install the bearing, the bearing inner spacer, the bearing outer spacer, the bearing inner gasket and the bearing outer gasket into the reflector switching bearing seat and the switching reflector seat in sequence, and install the bearing inner pressure ring and the bearing outer pressure ring in sequence to tighten them;

[0011] S2: Install the adjustable reflector fixture and test the axis accuracy using the autocollimator;

[0012] S3: Place the switching reflector into the switching reflector seat, stick it to the reference surface, and fix it with UV glue at the contact edge;

[0013] S4: Building a switching reflector detection device on the optical platform and calibrating the switching reflector;

[0014] S5: Install the switching gear limit block on the driven gear, install the driven gear on the switching reflector seat, glue the magnetic beads to the mounting holes on the switching reflector seat, fix the magnetic bead pressure plate on the switching reflector seat, fix the adsorption screws and adsorption screw adjustment gaskets on the reflector switching bearing seat, and complete the installation and adjustment of the switching reflector mechanism.

[0015] The installation and adjustment method provided by the present invention also has the following technical features: the switching reflector detection device includes a supporting fixture for fixing a component to be detected, an adapter plate fixed on the supporting fixture, an adjustable reflector mounted on the adapter plate, a first autocollimator placed in front of the adjustable reflector, a third autocollimator whose optical axis is 90° to the optical axis of the adjustable reflector, a second autocollimator that is self-aligned with the first autocollimator, and a pentaprism placed at the intersection of the optical paths of the second autocollimator and the third autocollimator.

[0016] The adjustment method provided by the present invention also has the following technical features: S4 comprises:

[0017] S4.1: Fix the support platform on the optical platform, tighten the adjustable reflector on the adapter plate, and fit the adapter plate onto the shaft end of the switching reflector;

[0018] S4.2: Place the first autocollimator in front of the adjustable reflector, align the center, and rotate the adjustable reflector along with the axis of the switching reflector. According to the circle drawing amount and the center of the circle drawing of the reflected image in the autocollimator, adjust the angle of the adjustable reflector to minimize the circle drawing amount.

[0019] S4.3: Install the third autocollimator, center the optical path with the switching reflector, remove the supporting fixture and the component to be tested from the optical platform, and align the second autocollimator with the first autocollimator;

[0020] S4.4: The second autocollimator is fixed and the pentaprism is placed so that the angle between the optical path of the third autocollimator and the second autocollimator is 90°;

[0021] S4.5: The three autocollimators are fixed, the pentaprism is removed, the support fixture is reinstalled in the original position, and the adjustable reflector and adapter plate are removed;

[0022] S4.5: Adjust the angle of the switching reflector to make the pitch line in the third autocollimator centered. The azimuth line deviation angle is recorded as A. The 45-degree deviation between the switching reflector surface and the rotation axis is A / 2. Determine whether A / 2 is out of tolerance. If it is out of tolerance, make adjustments.

[0023] Beneficial Effects

[0024] The switching reflector mechanism provided by the present invention can realize the switching of the optical path, has high repeatability and positioning accuracy, and ensures the stability of the optical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of the structure of the switching reflector mechanism provided in this application;

[0027] Figure 2 This is a front view of the switching reflector mechanism provided in this application;

[0028] Figure 3 for Figure 2 Sectional view of the AA section;

[0029] Figure 4 This is a right side view of the switching reflector mechanism provided in this application;

[0030] Figure 5 for Figure 2 Sectional view of the middle DD section;

[0031] Figure 6 for Figure 4 Sectional view of the EE section;

[0032] Figure 7 for Figure 2 Sectional view of the middle BB section;

[0033] Figure 8 This is a working schematic diagram of the switchable reflector detection device mentioned in an embodiment of the present application;

[0034] Fig. 9 This is a schematic diagram of the connection of the support tooling mentioned in the embodiment of the present application.

[0035] Among them, 1: reflector switching bearing seat; 2: switching reflector; 3: adsorption screw; 4: bearing; 5: bearing inner spacer; 6: bearing outer spacer; 7: bearing first outer gasket; 8: bearing second outer gasket; 9: bearing third outer gasket; 10: bearing first inner gasket; 11: bearing second inner gasket; 12: bearing third inner gasket; 13: bearing outer pressure ring; 14: bearing inner pressure ring; 15: driven gear; 16: first screw; 17: switching gear limit block; 18: first adsorption screw adjustment gasket; 19: second adsorption screw adjustment gasket; 20: third adsorption screw adjustment gasket; 21: fourth adsorption screw adjustment gasket; 22: second screw; 23: third screw; 24: magnetic beads; 25: switching reflector seat; 26: magnetic bead pressure plate. DETAILED DESCRIPTION

[0036] The present application is further described in detail below in conjunction with the accompanying drawings and examples, but it should be noted that these implementation methods are not limitations of the present application, and equivalent changes or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these implementation methods are all within the scope of protection of the present application.

[0037] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the creation of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the creation of the present application.

[0038] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0039] The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention of this application can be understood by specific circumstances.

[0040] like Figure 1-9 As shown, an embodiment of the present invention provides a switching reflector mechanism, which includes: a switching reflector 2, a switching reflector seat 25 for installing the switching reflector 2, a bearing assembly for providing a rotating shaft system for the switching reflector 2, a reflector switching bearing seat 1 for fixing the bearing assembly, a driven gear 15 mounted on the shaft end of the switching reflector seat 1, a switching gear limit block 17 installed on the driven gear 15, and an adsorption assembly for adjusting the contact position of the switching gear limit block 17.

[0041] In the above embodiment, the driven gear 15 is radially fastened by the first screw 16 and the third screw 23, and the switching gear limit block 17 is mounted on the driven gear 15 by the second screw 22. The magnetic bead pressure plate 26 is fixed on the switching reflector seat 25 by the second screw 22.

[0042] In some embodiments, the switching reflector 2 is mounted on the reference surface of the switching reflector seat 25, and the angle between the mirror surface of the switching reflector 2 and the rotation axis is 45°. After meeting the requirements, the glue injection holes on the side of the switching reflector are fixed with glue, and the high-precision surface accuracy of the switching reflector is ensured.

[0043] In some embodiments, the bearing assembly includes a bearing outer gasket unit installed in the switching reflector seat 25 and the reflector switching bearing seat 1, a bearing inner pressure ring 14 and a bearing outer pressure ring 15 that fasten the bearing outer gasket unit through threads, a bearing 4, a bearing inner spacer 5 and a bearing outer spacer 6 disposed in the bearing 4, and a bearing inner gasket unit. The two bearings can use angular contact ball bearings or paired preloaded bearings to improve the rotation accuracy of the shaft system.

[0044] In some embodiments, the bearing outer gasket unit includes a plurality of bearing outer gaskets, and the bearing inner gasket unit includes a plurality of bearing inner gaskets. The plurality of bearing outer gaskets include a first bearing outer gasket 7, a second bearing outer gasket 8, and a second bearing outer gasket 9, and the plurality of bearing inner gaskets include a first bearing inner gasket 10, a second bearing inner gasket 11, and a third bearing inner gasket 12.

[0045] In some embodiments, the adsorption assembly includes a magnetic bead 24 bonded to a mounting hole on a switching reflector seat 25, a magnetic bead pressure plate 26 fixed to the switching reflector seat 25, two adsorption screws 3 and an adsorption screw adjustment gasket for adjusting the contact position of the switching gear limit block 17, and two adsorption screws 3 for stabilizing the position of the switching reflector 2. The adsorption screw adjustment gasket includes a first adsorption screw adjustment gasket 18, a second adsorption screw adjustment gasket 19, a third adsorption screw adjustment gasket 20, and a fourth adsorption screw adjustment gasket 21.

[0046] In the above embodiment, two of the four adsorption screws 3 near the gear end and the adsorption screw adjustment gasket are fixed to the reflector switching bearing seat 1, and the contact position of the switching gear limit block 17 is adjusted by changing the thickness or number of the adsorption screw adjustment gasket, so that the switching reflector 2 is switched to the required position of the optical path. The two adsorption screws 3 near the switching reflector end can adjust the distance between the adsorption screw adjustment gasket and the magnetic bead 24, thereby adjusting the adsorption force, and prohibiting the adsorption screw 3 from directly contacting the magnetic bead 24. The adsorption force between the magnetic bead 24 and the adsorption screw 3 is used to stabilize the position of the switching reflector 2 to prevent the position from loosening.

[0047] In some embodiments, a method for adjusting a switchable reflector mechanism is provided, the method for adjusting the reflector mechanism as described in any one of the above items comprising:

[0048] S1: Measure the bearing clearance, select the bearing inner gasket and the bearing outer gasket, install the bearing 4, the bearing inner spacer 5, the bearing outer spacer 6, the bearing inner gasket and the bearing outer gasket into the reflector switching bearing seat 1 and the switching reflector seat 25 in sequence, and install the bearing inner pressure ring 14 and the bearing outer pressure ring 13 in sequence and tighten them;

[0049] S2: Install the adjustable reflector fixture and test the axis accuracy using the autocollimator;

[0050] S3: Place the switching reflector 2 into the switching reflector seat 25, stick it to the reference surface, and fix it with UV glue at the contact edge point; UV glue is used here for temporary fixation for detection. UV glue has the advantages of low stress, fast curing, and easy removal.

[0051] S4: Building a switching reflector detection device on the optical platform to calibrate the switching reflector 2;

[0052] S5: Install the switching gear limit block 17 on the driven gear 15, and install the driven gear 15 on the switching reflector seat 25. The magnetic bead 24 is glued to the mounting hole on the switching reflector seat 25, and the magnetic bead pressure plate 26 is fixed to the switching reflector seat 25. The adsorption screw 3 and the adsorption screw adjustment gasket are fixed to the reflector switching bearing seat 1 to complete the installation and adjustment of the switching reflector mechanism.

[0053] In some embodiments, the switchable reflector detection device includes a supporting fixture for fixing the component to be detected, an adapter plate fixed on the supporting fixture, an adjustable reflector mounted on the adapter plate, a first autocollimator placed in front of the adjustable reflector, a third autocollimator whose optical axis is 90° to the optical axis of the adjustable reflector, a second autocollimator that is self-aligned with the first autocollimator, and a pentaprism placed at the intersection of the optical paths of the second autocollimator and the third autocollimator.

[0054] In some embodiments, S4.1: the above assembled assembly is mounted on the supporting fixture by two M2 hexagon socket screws, the supporting fixture is mounted on the threaded hole at the center position on the optical platform by two M6 hexagon socket screws, the adjustable reflector is tightened on the adapter plate, the adapter plate is mounted on the shaft end of the switching reflector, and after being installed to the bottom, it is radially locked with two M2 hexagon socket screws; the adapter plate is designed with an M30×1 external thread, the adjustable reflector has an M30×1 internal thread, and the adjustable reflector is screwed onto the adapter plate through the M30×1 thread;

[0055] S4.2: Place the first autocollimator in front of the adjustable reflector, align the center, and rotate the adjustable reflector along with the switching reflector axis. According to the circle amount and the center of the circle drawn by the reflected image in the autocollimator, adjust the angle of the adjustable reflector to minimize the circle amount. At this time, the adjustable reflector surface is perpendicular to the axis of the axis system. Then, align the first autocollimator with the adjustable reflector surface and keep it still.

[0056] S4.3: Install the third autocollimator, center the optical path with the switching reflector, remove the supporting fixture and the component to be tested from the optical platform, and align the second autocollimator with the first autocollimator;

[0057] S4.4: The second autocollimator is fixed and the pentaprism is placed so that the angle between the optical path of the third autocollimator and the second autocollimator is 90°;

[0058] S4.5: The three autocollimators are fixed, the pentaprism is removed, and the support fixture is reinstalled in the original position. After the adjustable reflector is aligned with the first autocollimator, two M6 screws are tightened to restore the original installation position, and the adjustable reflector and adapter plate are removed;

[0059] S4.5: Adjust the angle of the switching reflector to make the pitch line in the third autocollimator centered. The azimuth line deviation angle is recorded as A. The 45-degree deviation between the switching reflector surface and the rotation axis is A / 2. Determine whether A / 2 is out of tolerance. If it is out of tolerance, make adjustments.

[0060] In some embodiments, the adjustment process of the switching reflector is as follows:

[0061] Keep the switch reflector detection device unchanged, and heat and remove the UV glue on the edge of the original adjustable reflector. Install the adjustment frame tooling on the switch reflector seat. The adjustment frame tooling is designed with a through hole connected to the switch reflector seat with an M2 screw based on the available threaded hole interface on the switch reflector seat. One end of the adjustment frame is designed with a threaded hole and the other end is designed with a plane. The adjustment blocks 1 and 2 are bonded to the edge of the switch reflector with UV glue, and the switch reflector surface angle is fine-tuned by the top screw in combination with the adjustment blocks 1.2 until the error of the switch reflector surface and the axis 45 degrees is not greater than 1', and then the silicone rubber is poured from the glue hole, and the glue is cured for 24 hours. After the glue is cured, remove the tools and proceed with the subsequent parts assembly.

[0062] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A switching mirror mechanism, characterized in that: The mechanism includes: a switching reflector, a switching reflector seat for mounting the switching reflector, a bearing assembly for providing a rotating shaft system for the switching reflector, a reflector switching bearing seat for fixing the bearing assembly, a driven gear sleeved on the shaft end of the switching reflector seat, a switching gear limit block mounted on the driven gear, and an adsorption assembly for adjusting the contact position of the switching gear limit block.

2. The switchable reflector mechanism according to claim 1, characterized in that: The switching reflector is mounted on the reference plane of the switching reflector seat, and the angle between the mirror surface of the switching reflector and the rotation axis is 45°.

3. The switchable reflector mechanism according to claim 1, characterized in that: The bearing assembly includes a bearing outer gasket unit installed in a switching reflector seat and a reflector switching bearing seat, a bearing inner pressure ring and a bearing outer pressure ring that fasten the bearing outer gasket unit through threads, a bearing, a bearing inner spacer and a bearing outer spacer arranged in the bearing, and a bearing inner gasket unit.

4. The switchable reflector mechanism according to claim 3, characterized in that: The bearing outer gasket unit includes a plurality of bearing outer gaskets, and the bearing inner gasket unit includes a plurality of bearing inner gaskets.

5. The switchable reflector mechanism according to claim 1, characterized in that: The adsorption assembly includes a magnetic bead bonded to the mounting hole on the switching reflector seat, a magnetic bead pressure plate fixed on the switching reflector seat, two adsorption screws and an adsorption screw adjustment gasket for adjusting the contact position of the switching gear limit block, and two adsorption screws for stabilizing the position of the switching reflector.

6. A method for adjusting a switching reflector mechanism, characterized in that: The adjustment method is used for adjusting the reflector mechanism according to any one of claims 1 to 5, comprising: S1: Measure the bearing clearance, select the bearing inner gasket and the bearing outer gasket, install the bearing, the bearing inner spacer, the bearing outer spacer, the bearing inner gasket and the bearing outer gasket into the reflector switching bearing seat and the switching reflector seat in sequence, and install the bearing inner pressure ring and the bearing outer pressure ring in sequence to tighten them; S2: Install the adjustable reflector fixture and test the axis accuracy using the autocollimator; S3: Place the switching reflector into the switching reflector seat, stick it to the reference surface, and fix it with UV glue at the contact edge; S4: Building a switching reflector detection device on the optical platform and calibrating the switching reflector; S5: Install the switching gear limit block on the driven gear, install the driven gear on the switching reflector seat, glue the magnetic beads to the mounting holes on the switching reflector seat, fix the magnetic bead pressure plate on the switching reflector seat, fix the adsorption screws and adsorption screw adjustment gaskets on the reflector switching bearing seat, and complete the installation and adjustment of the switching reflector mechanism.

7. The adjustment method according to claim 6, characterized in that: The switchable reflector detection device includes a supporting fixture for fixing a component to be detected, an adapter plate fixed on the supporting fixture, an adjustable reflector mounted on the adapter plate, a first autocollimator placed in front of the adjustable reflector, a third autocollimator whose optical axis is 90° to the optical axis of the adjustable reflector, a second autocollimator that is self-aligned with the first autocollimator, and a pentaprism placed at the intersection of the optical paths of the second autocollimator and the third autocollimator.

8. The adjustment method according to claim 7, characterized in that: The S4 includes: S4.1: Fix the support platform on the optical platform, tighten the adjustable reflector on the adapter plate, and fit the adapter plate onto the shaft end of the switching reflector; S4.2: Place the first autocollimator in front of the adjustable reflector, align the center, and rotate the adjustable reflector along with the axis of the switching reflector. According to the circle drawing amount and the center of the circle drawing of the reflected image in the autocollimator, adjust the angle of the adjustable reflector to minimize the circle drawing amount. S4.3: Install the third autocollimator, center the optical path with the switching reflector, remove the supporting fixture and the component to be tested from the optical platform, and align the second autocollimator with the first autocollimator; S4.4: The second autocollimator is fixed and the pentaprism is placed so that the angle between the optical path of the third autocollimator and the second autocollimator is 90°; S4.5: The three autocollimators are fixed, the pentaprism is removed, the support fixture is reinstalled in the original position, and the adjustable reflector and adapter plate are removed; S4.5: Adjust the angle of the switching reflector to make the pitch line in the third autocollimator centered. The azimuth line deviation angle is recorded as A. The 45-degree deviation between the switching reflector surface and the rotation axis is A / 2. Determine whether A / 2 is out of tolerance. If it is out of tolerance, make adjustments.

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