Six-dimensional adjusting frame for large-aperture optical sub-mirror and use method of six-dimensional adjusting frame

Abstract

The invention provides a six-dimensional adjusting frame for a large-aperture optical sub-mirror and a using method thereof.The six-dimensional adjusting frame for the large-aperture optical sub-mirror comprises a bottom supporting seat used for fixing the sub-mirror, the bottom of the bottom supporting seat is connected with three spiral transmission devices, the bottoms of the three spiral transmission devices are connected with a three-degree-of-freedom plate, and the three-degree-of-freedom plate is connected with a three-degree-of-freedom adjusting device. The bottom of the three-degree-of-freedom plate is connected with an X-axis planar motion device, the bottom of the X-axis planar motion device is connected with a Y-axis planar motion device, and the bottom of the Y-axis planar motion device is connected with a large gear ring roller rotating device used for rotating around the Z axis. According to the invention, the problem of how to realize six-dimensional direction movement and accurate positioning of the large-aperture optical sub-mirror in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical system movement, and in particular to a six-dimensional adjustment frame for a large-aperture optical sub-mirror and a use method thereof. Background Art

[0002] With the rapid progress of optical technology, the application of optical systems is becoming more and more extensive, and the requirements for the imaging quality of the system are becoming higher and higher. The adjustment accuracy of the optical system has become the main factor affecting the imaging quality of the system. In particular, the position adjustment accuracy of large-aperture optical sub-mirrors with large support platforms is required to be high, and a more precise six-dimensional motion system is required to achieve six-dimensional movement of large-aperture optical sub-mirrors and accurate positioning.

[0003] Therefore, how to achieve six-dimensional movement of large-aperture optical sub-mirrors and precise positioning becomes a technical problem that needs to be solved. Summary of the invention

[0004] The purpose of the present invention is to provide a six-dimensional adjustment frame for a large-aperture optical sub-mirror and a method of using the same, mainly to solve the problem of how to achieve six-dimensional movement of a large-aperture optical sub-mirror and precise positioning in the above-mentioned prior art.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a six-dimensional adjustment frame for a large-aperture optical sub-mirror, characterized in that: the six-dimensional adjustment frame for a large-aperture optical sub-mirror includes a bottom support seat for fixing the sub-mirror, the bottom of the bottom support seat is connected to three spiral transmission devices, the bottom of the three spiral transmission devices is connected to a three-degree-of-freedom plate, the bottom of the three-degree-of-freedom plate is connected to an X-axis plane motion device, the bottom of the X-axis plane motion device is connected to a Y-axis plane motion device, and the bottom of the Y-axis plane motion device is connected to a large gear ring roller rotation device for rotating around the Z-axis.

[0006] Furthermore, three first bosses are provided at the bottom of the bottom support seat, distributed in a triangular shape;

[0007] Each spiral transmission device includes a flat flexible joint, an output flange, a first gear ring, a first bearing, a base plate, a bearing adapter plate, a sleeve, a fourth roller and a fourth motor assembly, a first cylinder is provided at the bottom of the flat flexible joint, a second cylinder is provided at the bottom of the first cylinder, and a first boss is connected to the top of the flat flexible joint;

[0008] The base plate is fixed on the three-degree-of-freedom plate, the inner ring of the first bearing is fixedly connected to the bearing adapter plate and the base plate respectively, the inner ring of the first bearing is a stator, the outer ring of the first bearing is a rotor, the outer ring of the first bearing is connected to the output flange, the output flange is connected to the first gear ring, the first gear ring is transmission-connected to the fourth roller, the fourth motor assembly is installed on the base plate, the fourth roller is axially fixedly connected to the fourth motor assembly, and the fourth motor assembly drives the fourth roller to rotate;

[0009] The first cylinder is threadedly connected to the output flange, the sleeve is arranged in the inner ring of the first bearing, the second cylinder is arranged in the sleeve, and the second cylinder and the sleeve are clearance-matched.

[0010] Further, the top of the flat flexible joint is threadedly fixedly connected to the first boss of the bottom support seat; two pairs of semi-elliptical arc grooves are provided at the upper end of the flat flexible joint, namely, a first semi-elliptical arc groove, a second semi-elliptical arc groove, a third semi-elliptical arc groove and a fourth semi-elliptical arc groove, the first semi-elliptical arc groove and the second semi-elliptical arc groove serve as a pair of semi-elliptical arc grooves of an upper layer, the first semi-elliptical arc groove and the second semi-elliptical arc groove are located between the first semi-elliptical arc groove and the second semi-elliptical arc groove, and the third semi-elliptical arc groove and the fourth semi-elliptical arc groove serve as a pair of semi-elliptical arc grooves of a lower layer, the third semi-elliptical arc groove and the fourth semi-elliptical arc groove are located between the second connecting rib, and the projections of the first connecting rib and the second connecting rib on the horizontal plane are vertical;

[0011] The outer ring of the first bearing is threadedly fixedly connected to the output flange, and the output flange is threadedly fixedly connected to the first gear ring.

[0012] Furthermore, the three screw transmission devices are respectively a first screw transmission device, a second screw transmission device and a third screw transmission device, each screw transmission device has an adjustment stroke of 10 mm along the Z axis, and the minimum adjustable axial displacement of each screw transmission device is 1 um;

[0013] The first flat flexible joint of the first screw transmission device and the second flat flexible joint of the second screw transmission device push the bottom support seat to move upward along the Z axis, and the third flat flexible joint of the third screw transmission device pushes the bottom support seat to move downward along the Z axis. The minimum adjustable pitch angle of the sub-mirror on the top of the bottom support seat around the X and Y axes is 1".

[0014] Further, the X-axis planar motion device includes a first rack, a first roller, a first motor mounting plate, a first motor assembly, an X-axis guide rail platform and a first guide rail slider assembly, the first rack is connected to the X-axis guide rail platform, the first rack is meshed with the first roller, the first roller is axially fixedly connected to the first motor assembly, the bottom end of the first motor mounting plate is connected to the first motor assembly, and the top end of the first motor mounting plate is connected to the third boss at the bottom of the three-degree-of-freedom plate.

[0015] The first guide rail and slider assembly includes a first guide rail and a first slider arranged along the X-axis. The first guide rail is arranged on the X-axis guide rail platform. The first slider is connected to the second boss at the bottom of the three-degree-of-freedom plate. The first slider is movably connected to the first guide rail.

[0016] Further, the Y-axis planar motion device includes a second rack, a second roller, a second motor mounting plate, a second motor assembly, a Y-axis guide rail platform and a second guide rail slider assembly, the second rack is connected to the Y-guide rail platform, the second rack is meshed with the second roller, the second roller is axially fixedly connected to the second motor assembly, the bottom end of the second motor mounting plate is connected to the second motor assembly, and the top end of the second motor mounting plate is connected to the fifth boss at the bottom of the X-axis guide rail platform.

[0017] The second guide rail slider assembly includes a second guide rail and a second slider arranged along the Y-axis, the second guide rail is arranged on the Y-axis guide rail platform, the second slider is connected to the fourth boss at the bottom of the X-axis guide rail platform, and the second slider is movably connected to the second guide rail.

[0018] Furthermore, the adjustable stroke of the X-axis plane motion device and the Y-axis plane motion device is 40 mm, and the minimum adjustable displacement of the X-axis plane motion device and the Y-axis plane motion device is 4 um;

[0019] The bottom end of the first motor mounting plate is fixedly connected to the first motor assembly with threads, and the bottom end of the second motor mounting plate is fixedly connected to the second motor assembly with threads;

[0020] The top of the first motor mounting plate is threadedly fixedly connected to the third boss of the three-degree-of-freedom plate; the top of the second motor mounting plate is threadedly fixedly connected to the fifth boss at the bottom of the X-axis guide rail platform.

[0021] Furthermore, the large ring gear roller rotating device includes a third motor assembly, a third roller, a large ring gear assembly, a base plate, a second bearing and a turntable, the outer ring of the second bearing is a stator, the inner ring of the second bearing is a rotor, the third motor assembly and the outer ring of the second bearing are connected to the base plate, the third motor assembly is axially fixed to the third roller, the third roller is meshed with the large ring gear assembly, the large ring gear assembly is connected to the turntable, the turntable is connected to the inner ring of the second bearing, and the top of the turntable is connected to the sixth boss at the bottom of the Y-axis guide platform.

[0022] Further, the outer ring of the second bearing is fixedly connected to the bottom plate by threads, and the inner end surface of the second bearing is fixedly connected to the turntable by threads;

[0023] The large gear ring roller rotating device drives the Y-axis guide platform to rotate 360° around the Z axis, and the minimum adjustable rotation angle around the Z axis is 1″;

[0024] A first limiting portion is provided on both sides of the X-axis guide rail platform, and the two first limiting portions correspond to the two ends of the first guide rail respectively; a second limiting portion is provided on both sides of the Y-axis guide rail platform, and the two second limiting portions correspond to the two ends of the second guide rail respectively.

[0025] A method for using a six-dimensional adjustment frame for a large-aperture optical sub-mirror, using the above-mentioned six-dimensional adjustment frame for a large-aperture optical sub-mirror, characterized in that it comprises the following steps:

[0026] One or more fourth motor components in the three spiral transmission devices are driven, and the corresponding fourth rollers are driven to transmit to the corresponding first gear rings, so as to drive the corresponding output flange and the rotor of the first bearing to rotate along the Z axis, and the corresponding first cylinder drives the flat flexible joint to move up and down along the Z axis, so that the corresponding flat flexible joint drives the bottom support seat to translate along the Z axis or deflect around the X axis or around the Y axis, and the bottom support seat causes the sub-mirror to translate along the Z axis or deflect around the X axis or around the Y axis;

[0027] The first motor assembly is driven, and the first rack and the first roller are driven to drive the three-degree-of-freedom plate and the bottom support seat to move horizontally along the X-axis synchronously;

[0028] and / or driving the second motor assembly, the second rack and the second roller to transmit, driving the X-axis guide platform, the three-degree-of-freedom plate and the bottom support seat to move horizontally along the Y-axis synchronously;

[0029] And / or drive the third motor assembly, the third roller is transmitted, the third roller and the large ring gear assembly are transmitted, and the large ring gear assembly drives the Y-axis guide platform, the X-axis guide platform, the three-degree-of-freedom plate and the bottom support seat to rotate synchronously around the Z-axis through the turntable.

[0030] In view of the above technical features, the present invention has the following beneficial effects:

[0031] 1. The six-dimensional adjustment frame for a large-aperture optical sub-mirror of the present invention realizes the six-dimensional movement of the large-aperture optical sub-mirror through three spiral transmission devices, an X-axis plane motion device, a Y-axis plane motion device and a large gear ring roller rotation device, and can accurately position it. Each dimensional motion device (three spiral transmission devices, X-axis plane motion device, Y-axis plane motion device and large gear ring roller rotation device) has a simple structure and is easy to disassemble and maintain;

[0032] 2. The six-dimensional adjustment frame for a large-aperture optical sub-mirror of the present invention can move independently along the X-axis and Y-axis and rotate around the Z-axis, and the position accuracy of each dimension can be controlled independently, with high accuracy, large adjustment space and high rigidity;

[0033] 3. The six-dimensional adjustment frame for a large-aperture optical sub-mirror of the present invention has an X-axis plane motion device and a Y-axis plane motion device, both of which have an adjustable stroke of 40 mm, and the minimum adjustable displacement along the X-axis translation and the minimum adjustable displacement along the Y-axis translation can both reach 4 μm; the Z-axis rotation device (i.e., the large gear ring roller rotation device) can rotate 360°, and the minimum adjustable rotation angle around the Z axis is 1″. Therefore, the adjustment accuracy is high in the X-axis and Y-axis translation and the Z-axis rotation.

[0034] 4. The six-dimensional adjustment frame for a large-aperture optical sub-mirror of the present invention can realize the translation of the sub-mirror along the Z axis by controlling three screw transmission devices at the same time, and can realize the deflection of the sub-mirror around the X-axis and Y-axis by controlling the three screw transmission devices to move in different directions along the Z axis, while the influence on the Z-axis stiffness can be ignored, and the expected effect can be achieved;

[0035] 5. In the six-dimensional adjustment frame for a large-aperture optical sub-mirror of the present invention, the computer (i.e., the control unit) controls each dimension of the six-dimensional adjustment frame without affecting each other, the algorithm instructions are relatively simple, and the cost is relatively low;

[0036] 6. The six-dimensional adjustment frame of the present invention is used for large-aperture optical sub-mirrors. During the adjustment process of the sub-mirrors, when a rotation, translation or tilting motion failure occurs, each dimensional motion device (such as three spiral transmission devices, X-axis plane motion device, Y-axis plane motion device and large gear ring roller rotation device) can be checked in a targeted manner, saving time and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of a six-dimensional adjustment frame for a large-aperture optical sub-mirror in specific embodiment 1.

[0038] Figure 2 It is a schematic structural diagram of the bottom support seat in specific embodiment 1 (looking from above).

[0039] Figure 3 It is a schematic diagram of the structure of three spiral transmission devices in specific embodiment 1.

[0040] Figure 4 It is a structural schematic diagram of the screw transmission device in specific embodiment 1 (taking the first screw transmission device as an example).

[0041] Figure 5 yes Figure 4 sectional view of .

[0042] Figure 6 It is a structural schematic diagram of the flat flexible joint in specific embodiment 1.

[0043] Figure 7 yes Figure 6 The state diagram after the flat flexible joint is rotated 90° horizontally.

[0044] Figure 8 It is a perspective view of the flat flexible joint in specific embodiment 1 (reflecting the vertical state of the first connecting rib and the second connecting rib and the positions of the two pairs of semi-elliptical arc grooves).

[0045] Fig. 9 It is a schematic structural diagram of the three-degree-of-freedom plate in specific embodiment 1 (looking from above).

[0046] Fig.10 It is a schematic diagram of the structure of the three-dimensional motion device in specific embodiment 1 (including an X-axis plane motion device, a Y-axis plane motion device and a large gear ring roller rotation device).

[0047] Fig.11 It is a structural schematic diagram of the X-axis plane motion device in specific embodiment 1.

[0048] Fig.12 It is a structural schematic diagram of the X-axis guide platform in specific embodiment 1 (looking from above).

[0049] Fig.13 It is a schematic diagram of the structure of the Y-axis plane motion device in specific embodiment 1.

[0050] Fig.14 It is a schematic diagram of the structure of the Y-axis guide platform in specific embodiment 1 (looking from above).

[0051] Fig.15 It is a structural schematic diagram of the large gear ring roller rotating device in specific embodiment 1.

[0052] Fig.16 It is a cross-sectional view of the large gear ring roller rotating device in specific embodiment 1.

[0053] In the figure: 1, bottom support seat; 101, first boss;

[0054] 2. First spiral transmission device; 21. First flat flexible joint; 200. Spiral transmission device; 201. Flat flexible joint; 201-1. Semi-elliptical arc groove; 201-1A. First semi-elliptical arc groove; 201-1B. Second semi-elliptical arc groove; 201-1C. Third semi-elliptical arc groove; 201-1D. Fourth semi-elliptical arc groove; 201-2. First cylinder; 201-3. Second cylinder; 202. Output flange; 203. First gear ring; 204. First bearing; 205. Base plate; 206. Bearing adapter plate; 207. Sleeve; 208. Fourth roller; 209. Fourth motor assembly; 210-1. First connecting rib; 210-2. Second connecting rib;

[0055] 3. Second spiral transmission device; 31. Second flat flexible joint;

[0056] 4. The third spiral transmission device; 41. The third flat flexible joint;

[0057] 5. three-degree-of-freedom plate; 501. second boss; 502. third boss;

[0058] 6. X-axis plane motion device; 601. first rack; 602. first roller; 603. first motor mounting plate; 604. first motor assembly; 605. X-axis guide rail platform; 605-1. fourth boss; 605-2. fifth boss; 606. first guide rail slider assembly; 606-1. first guide rail; 606-2. first slider;

[0059] 7. Y-axis plane motion device; 701. second rack; 702. second roller; 703. second motor mounting plate; 704. second motor assembly; 705. Y-axis guide rail platform; 705-1. sixth boss; 706. second guide rail slider assembly; 706-1. second guide rail; 706-2. second slider;

[0060] 8. Large gear ring roller rotating device; 801. Third motor assembly; 802. Third roller; 803. Large gear ring assembly; 804. Bottom plate; 805. Second bearing; 806. Turntable;

[0061] 9-1, first limiting portion; 9-2, second limiting portion. DETAILED DESCRIPTION

[0062] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0063] See also Figures 1 to 16 , Specific embodiment 1, this embodiment 1 provides a six-dimensional adjustment frame for a large-aperture optical sub-mirror, including a bottom support seat 1 for fixing the sub-mirror, the bottom of the bottom support seat 1 is connected to three screw transmission devices 200, the bottom of the three screw transmission devices 200 is connected to a three-degree-of-freedom plate 5, the bottom of the three-degree-of-freedom plate 5 is connected to an X-axis plane motion device 6, the bottom of the X-axis plane motion device 6 is connected to a Y-axis plane motion device 7, and the bottom of the Y-axis plane motion device 7 is connected to a large gear ring roller rotation device 8 for rotating around the Z axis.

[0064] The bottom of the bottom support seat 1 is provided with three first bosses 101, which are distributed in a triangular shape;

[0065] The three spiral transmission devices 200 have the same structural design and the same driving mode. Each spiral transmission device 200 includes a flat flexible joint 201, an output flange 202, a first gear ring 203, a first bearing 204, a base plate 205, a bearing adapter plate 206, a sleeve 207, a fourth roller 208 and a fourth motor assembly 209. A first cylinder 201-2 is provided at the bottom of the flat flexible joint 201, a second cylinder 201-3 is provided at the bottom of the first cylinder 201-2, and the top of the flat flexible joint 201 is connected to the first boss 101, that is, the three spiral transmission devices 200 are respectively connected to the three first bosses 101, and the three spiral transmission devices 200 support the bottom support seat 1 from three directions or drive the bottom support seat 1 to move vertically up and down. In this embodiment 1, the flat flexible joint 201, the first cylinder 201-2 and the second cylinder 201-3 are integrally formed. Of course, according to actual needs, the flat flexible joint 201, the first cylinder 201-2 and the second cylinder 201-3 can also be separate types, and the three are connected into one.

[0066] The base plates 205 of the three spiral transmission devices 200 are all fixed on the three-degree-of-freedom plate 5. The inner ring of the first bearing 204 is fixedly connected to the bearing adapter plate 206 and the base plate 205 respectively. The inner ring of the first bearing 204 is a stator, and the outer ring of the first bearing 204 is a rotor. The outer ring of the first bearing 204 is connected to the output flange 202, for example, the two are fixedly connected by threads. The output flange 202 is connected to the first gear ring 203, for example, the two are fixedly connected by threads. The first gear ring 203 is transmission-connected to the fourth roller 208 (for example, the first gear ring 203 is meshed with the fourth roller 208), the fourth motor assembly 209 is installed on the base plate 205, the fourth roller 208 is axially fixedly connected to the fourth motor assembly 209, and the fourth motor assembly 209 drives the fourth roller 208 to rotate;

[0067] The first cylinder 201-2 is threadedly connected to the output flange 202. For example, the first cylinder 201-2 of the flat flexible joint 201 is provided with an external thread for threaded connection with the output flange 202. The sleeve 207 is arranged in the inner ring of the first bearing 204, and the second cylinder 201-3 is arranged in the sleeve 207. The second cylinder 201-3 and the sleeve 207 are clearance-matched, so that the flat flexible joint 201 can achieve a certain axial displacement. When the fourth motor assembly 209 drives the fourth roller 208 to rotate, the fourth roller 208 engages with the first gear ring 203, the fourth roller 208 drives the first gear ring 203 to rotate synchronously, the first gear ring 203 drives the output flange 202 to rotate synchronously, but the first cylinder 201-2 and the flat flexible joint 201 above it for connecting to the bottom of the bottom support seat 1 do not rotate. Because the outer wall of the first cylinder 201-2 is threadedly connected to the inner wall of the output flange 202, the first cylinder 201-2 moves up or down synchronously with the second cylinder 201-3 and the flat flexible joint 201, and the flat flexible joint 201 moves up or down synchronously with the bottom support seat 1, thereby realizing the function of the spiral transmission device 200 driving the bottom support seat 1 to move up and down, and indirectly realizing the vertical up and down movement of the sub-mirror.

[0068] The top of the flat flexible joint 201 is threadedly fixedly connected to the first boss 101 of the bottom support seat 1; the upper end of the flat flexible joint 201 is provided with two pairs of semi-elliptical arc grooves 201-1, namely the first semi-elliptical arc groove 201-1A, the second semi-elliptical arc groove 201-1B, the third semi-elliptical arc groove 201-1C and the fourth semi-elliptical arc groove 201-1D, the first semi-elliptical arc groove 201-1A and the second semi-elliptical arc groove 201-1B are a pair of semi-elliptical arc grooves 201-1 of the upper layer, and the first semi-elliptical arc groove 201-1 The portion between A and the second semi-elliptical arc groove 201-1B is the first connecting rib 210-1, the third semi-elliptical arc groove 201-1C and the fourth semi-elliptical arc groove 201-1D are a pair of semi-elliptical arc grooves 201-1 in the lower layer, and the portion between the third semi-elliptical arc groove 201-1C and the fourth semi-elliptical arc groove 201-1D is the second connecting rib 210-2, and the projections of the first connecting rib 210-1 and the second connecting rib 210-2 on the horizontal plane are vertical (for example, set at 90°), see Figures 7 to 9 . The semi-elliptical arc groove 201-1 has a certain thickness. When the three spiral transmission devices 200 are controlled to move in inconsistent directions along the Z axis, the sub-mirror can be deflected around the X axis and the Y axis. At this time, the semi-elliptical arc groove 201-1 provides some activity space for the deflection of the bottom support seat 1, so as to better realize the three spiral transmission devices 200 with the bottom support seat 1 and the sub-mirror thereon to deflect around the X axis and / or the Y axis. In this process, the rigidity of the flat flexible joint 201 in the X axis and the Y axis becomes weaker, so the flat flexible joint 201 can be deflected toward the X axis and the Y axis, that is, the three spiral transmission devices 200 with the bottom support seat 1 and the sub-mirror thereon deflect around the X axis and / or the Y axis, and the influence on the Z axis rigidity can be ignored.

[0069] The three screw transmission devices 200 are respectively a first screw transmission device 2, a second screw transmission device 3 and a third screw transmission device 4. The adjustment stroke of each screw transmission device 200 along the Z axis is 10 mm, and the minimum adjustable axial displacement of each screw transmission device 200 is 1 um.

[0070] The first flat flexible section 21 of the first screw transmission device 2 and the second flat flexible section 31 of the second screw transmission device 3 push the bottom support seat 1 to move upward along the Z axis, and the third flat flexible section 41 of the third screw transmission device 4 pushes the bottom support seat 1 to move downward along the Z axis. The minimum adjustable pitch angle of the sub-mirror on the top of the bottom support seat 1 around the X and Y axes is 1". Simultaneous control of the three screw transmission devices 200 can realize the translation of the sub-mirror along the Z axis. The minimum adjustable displacement along the Z axis is 1um. Controlling the three screw transmission devices 200 to have inconsistent movement directions along the Z axis can realize the deflection of the sub-mirror around the X and Y axes. The minimum adjustable pitch angle of the sub-mirror around the X and Y axes is 1", and the influence on the Z-axis stiffness is negligible, which can achieve the expected effect.

[0071] The X-axis planar motion device 6 includes a first rack 601, a first roller 602, a first motor mounting plate 603, a first motor assembly 604, an X-axis guide rail platform 605 and a first guide rail slider assembly 606. The first rack 601 is connected to the X-axis guide rail platform 605 (for example, the first rack 601 is fixedly connected to the side of the X-axis guide rail platform 605), the first rack 601 is meshed with the first roller 602, the first roller 602 is axially fixedly connected to the first motor assembly 604, and the bottom end of the first motor mounting plate 603 is connected to the first motor assembly 604, for example, the two are fixedly connected by threads. The top end of the first motor mounting plate 603 is connected to the third boss 502 at the bottom of the three-degree-of-freedom plate 5, for example, the two are fixedly connected by threads.

[0072] The first guide rail slider assembly 606 includes a first guide rail 606-1 and a first slider 606-2 arranged along the X-axis. The first guide rail 606-1 is arranged on the X-axis guide rail platform 605. The first slider 606-2 is connected to the second boss 501 at the bottom of the three-degree-of-freedom plate 5. The first slider 606-2 is movably connected to the first guide rail 606-1.

[0073] Taking the X-axis guide platform 605 as a reference, driven by the first motor assembly 604, the first roller 602 rotates. Since the first roller 602 is meshed with the first rack 601, the first motor mounting plate 603 of the first motor assembly 604 drives the three-degree-of-freedom plate 5 to perform X-axis plane motion along the first guide rail 606-1 of the X-axis using the first slider 606-2. The three-degree-of-freedom plate 5 drives its upper part (including three spiral transmission devices 200, the bottom support seat 1 and the sub-mirror) to synchronously perform plane motion along the X-axis (i.e., X-axis horizontal movement).

[0074] The Y-axis planar motion device 7 includes a second rack 701, a second roller 702, a second motor mounting plate 703, a second motor assembly 704, a Y-axis guide rail platform 705, and a second guide rail slider assembly 706. The second rack 701 is connected to the Y-guide rail platform (for example, the second rack 701 is fixedly connected to the side of the Y-guide rail platform), the second rack 701 is meshed with the second roller 702, the second roller 702 is axially fixedly connected to the second motor assembly 704, and the bottom end of the second motor mounting plate 703 is connected to the second motor assembly 704, for example, the two are fixedly connected by threads. The top end of the second motor mounting plate 703 is connected to the fifth boss 605-2 at the bottom of the X-axis guide rail platform 605, for example, the two are fixedly connected by threads.

[0075] The second guide rail slider assembly 706 includes a second guide rail 706-1 and a second slider 706-2 arranged along the Y-axis, the second guide rail 706-1 is arranged on the Y-axis guide rail platform 705, the second slider 706-2 is connected to the fourth boss 605-1 at the bottom of the X-axis guide rail platform 605, and the second slider 706-2 is movably connected to the second guide rail 706-1.

[0076] Taking the Y-axis guide platform 705 as a reference, driven by the second motor assembly 704, the second roller 702 rotates. Since the second roller 702 is meshed with the second rack 701, the second motor mounting plate 703 of the second motor assembly 704 drives the X-axis guide platform 605 to perform Y-axis plane motion along the second guide rail 706-1 of the Y-axis using the second slider 706-2. The X-axis guide platform 605 drives its upper part (including the three-degree-of-freedom plate 5, three spiral transmission devices 200, the bottom support seat 1 and the sub-mirror) to synchronously perform plane motion along the Y-axis (i.e., Y-axis horizontal movement).

[0077] The adjustable stroke of the X-axis plane motion device 6 and the Y-axis plane motion device 7 is 40 mm, and the minimum adjustable displacement of the X-axis plane motion device 6 and the Y-axis plane motion device 7 is 4 um, with high precision.

[0078] The large ring gear roller rotating device 8 includes a third motor assembly 801, a third roller 802, a large ring gear assembly 803, a base plate 804, a second bearing 805 and a turntable 806, the outer ring of the second bearing 805 is a stator, the inner ring of the second bearing 805 is a rotor, the third motor assembly 801 and the outer ring of the second bearing 805 are connected to the base plate 804, the third motor assembly 801 is axially fixed to the third roller 802, the third roller 802 is meshed with the large ring gear assembly 803, the large ring gear assembly 803 is connected to the turntable 806, the turntable 806 is connected to the inner ring of the second bearing 805 (that is, the rotor of the second bearing 805), and the top of the turntable 806 is connected to the sixth boss 705-1 at the bottom of the Y-axis guide platform 705.

[0079] The outer ring of the second bearing 805 is fixedly connected to the bottom plate 804 through threads, and the inner end surface of the second bearing 805 is fixedly connected to the turntable 806 through threads.

[0080] With the base plate 804 as a reference, the third roller 802 rotates under the drive of the third motor assembly 801. Since the third roller 802 is meshed with the large ring gear assembly 803, the large ring gear assembly 803 rotates synchronously with the turntable 806, and the turntable 806 rotates synchronously with the Y-axis guide platform 705. The Y-axis guide platform 705 drives its upper part (including the X-axis guide platform 605, three spiral transmission devices 200, the bottom support seat 1 and the sub-mirror) to rotate synchronously around the Z-axis.

[0081] The large gear ring roller rotating device 8 drives the Y-axis guide platform 705 to rotate 360° around the Z axis, and the minimum adjustable rotation angle around the Z axis is 1″, with high rotation accuracy. The first guide rail 606-1 and the second guide rail 706-1 are perpendicular to each other.

[0082] A first limit portion 9-1 is provided on both sides of the X-axis guide platform 605, and the two first limit portions 9-1 respectively correspond to the two ends of the first guide rail 606-1, so as to prevent the three-degree-of-freedom plate 5 from exceeding the length range of the first guide rail 606-1 when moving along the X-axis, that is, to prevent the three-degree-of-freedom plate 5 from exceeding its motion range when moving along the X-axis; a second limit portion 9-2 is provided on both sides of the Y-axis guide platform 705, and the two second limit portions 9-2 respectively correspond to the two ends of the second guide rail 706-1, so as to prevent the X-axis guide platform 605 from exceeding the length range of the second guide rail 706-1 when moving along the Y-axis, that is, to prevent the X-axis guide platform 605 from exceeding its motion range when moving along the Y-axis.

[0083] A method for using a six-dimensional adjustment frame for a large-aperture optical sub-mirror, using the above six-dimensional adjustment frame for a large-aperture optical sub-mirror, comprises the following steps:

[0084] One or more fourth motor components 209 in the three spiral transmission devices 200 are driven, and the corresponding fourth rollers 208 and the corresponding first gear rings 203 are driven to rotate along the Z axis with the corresponding output flange 202 and the rotor of the first bearing 204. The corresponding first cylinder 201-2 moves vertically up and down along the Z axis with the flat flexible joint 201, so that the corresponding flat flexible joint 201 moves the bottom support seat 1 along the Z axis or deflects around the X axis or around the Y axis, and the bottom support seat 1 makes the sub-mirror move along the Z axis or deflect around the X axis or around the Y axis;

[0085] and / or driving the first motor assembly 604, the first rack 601 and the first roller 602 to transmit, driving the three-degree-of-freedom plate 5 and the bottom support seat 1 to move horizontally along the X-axis synchronously;

[0086] and / or driving the second motor assembly 704, the second rack 701 and the second roller 702 to drive the X-axis guide platform 605, the three-degree-of-freedom plate 5 and the bottom support seat 1 to move horizontally along the Y-axis synchronously;

[0087] And / or drive the third motor assembly 801, the third roller 802 is transmitted, the third roller 802 and the large ring gear assembly 803 are transmitted, and the large ring gear assembly 803 drives the Y-axis guide platform 705, the X-axis guide platform 605, the three-degree-of-freedom plate 5 and the bottom support seat 1 to rotate synchronously around the Z axis through the turntable 806.

[0088] The above four actions can be performed separately or in combination according to actual needs. The six-dimensional adjustment frame can move along the X and Y axes and rotate around the Z axis independently. The position accuracy of each dimension can be controlled independently, with high precision, large adjustment space and high rigidity.

[0089] When a computer (such as a control unit) controls each dimension of the six-dimensional adjustment frame, they do not affect each other, the algorithm instructions are relatively simple, and the cost is low.

[0090] In this embodiment 1, three spiral transmission devices 200 are installed on the three-degree-of-freedom plate 5, forming the first "three-degree-of-freedom device" that can realize the translation of the bottom support seat 1 and the sub-mirror thereon along the Z axis, deflection around the X axis and / or deflection around the Y axis; the X-axis plane motion device 6, the Y-axis plane motion device 7 and the large gear ring roller rotation device 8 are also called the second "three-degree-of-freedom motion device". The "six-dimensional" in the six-dimensional adjustment frame in this application means that when the three spiral transmission devices 200 drive the bottom support seat 1 to move up and down, the three-dimensional angle adjustment of the bottom support seat 1 is realized, and the three-dimensional position adjustment of the bottom support seat 1 in the X-axis plane motion, the Y-axis plane motion and the rotation around the Z axis are added, which together form the six-dimensional position or angle adjustment of the bottom support seat 1, and realize the six-dimensional adjustment of the large-aperture optical sub-mirror.

[0091] In this embodiment 1, the transmission components in six dimensions have the advantages of high rigidity, high precision and zero backlash, and the displacement accuracy or pitch accuracy or rotation accuracy around the axis in the above six directions can be achieved during the actual assembly and adjustment process.

[0092] In this embodiment 1, motor components of Kamo Transmission Co., Ltd. are used. Three spiral transmission devices: AZM48A0C-SFP85PCA; large gear ring roller rotation device: AZM98A0C-SFP125PCA; X and Y axis plane motion: AZM48A0C-SFP70PCA.

[0093] The embodiment 1 realizes the six-degree-of-freedom adjustment of the large-aperture optical sub-mirror. The sub-mirror is a regular octagon with an inner diameter of 1090 mm and a mass of about 104 kg. The six-dimensional adjustment frame for the large-aperture optical sub-mirror of the embodiment 1 has the beneficial effects of large adjustment space, high rigidity, high precision and independent control.

[0094] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0095] In addition, the terms "first" and "second" 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0096] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A six-dimensional adjustment frame for a large-aperture optical sub-mirror, characterized in that: The six-dimensional adjustment frame for a large-aperture optical sub-mirror comprises a bottom support seat (1) for fixing the sub-mirror, the bottom of the bottom support seat (1) being connected to three screw transmission devices (200), the bottoms of the three screw transmission devices (200) being connected to a three-degree-of-freedom plate (5), the bottom of the three-degree-of-freedom plate (5) being connected to an X-axis plane motion device (6), the bottom of the X-axis plane motion device (6) being connected to a Y-axis plane motion device (7), and the bottom of the Y-axis plane motion device (7) being connected to a large gear ring roller rotating device (8) for rotating about a Z axis.

2. A six-dimensional adjustment frame for a large-aperture optical sub-mirror according to claim 1, characterized in that: The bottom of the bottom support seat (1) is provided with three first bosses (101) distributed in a triangular shape; Each spiral transmission device (200) comprises a flat flexible joint (201), an output flange (202), a first gear ring (203), a first bearing (204), a base plate (205), a bearing adapter plate (206), a sleeve (207), a fourth roller (208) and a fourth motor assembly (209); a first cylinder (201-2) is provided at the bottom of the flat flexible joint (201); a second cylinder (201-3) is provided at the bottom of the first cylinder (201-2); and a top of the flat flexible joint (201) is connected to a first boss (101); The base plate (205) is fixed on the three-degree-of-freedom plate (5); the inner ring of the first bearing (204) is fixedly connected to the bearing adapter plate (206) and the base plate (205) respectively; the inner ring of the first bearing (204) is a stator; the outer ring of the first bearing (204) is a rotor; the outer ring of the first bearing (204) is connected to the output flange (202); the output flange (202) is connected to the first gear ring (203); the first gear ring (203) is transmission-connected to the fourth roller (208); the fourth motor assembly (209) is mounted on the base plate (205); the fourth roller (208) is axially fixedly connected to the fourth motor assembly (209); and the fourth motor assembly (209) drives the fourth roller (208) to rotate; The first cylinder (201-2) is threadedly connected to the output flange (202), the sleeve (207) is arranged in the inner ring of the first bearing (204), the second cylinder (201-3) is arranged in the sleeve (207), and the second cylinder (201-3) and the sleeve (207) are clearance-matched.

3. A six-dimensional adjustment frame for a large-aperture optical sub-mirror according to claim 2, characterized in that: The top of the flat flexible joint (201) is threadedly fixedly connected to the first boss (101) of the bottom support seat (1); the upper end of the flat flexible joint (201) is provided with two pairs of semi-elliptical arc grooves (201-1), namely, a first semi-elliptical arc groove (201-1A), a second semi-elliptical arc groove (201-1B), a third semi-elliptical arc groove (201-1C) and a fourth semi-elliptical arc groove (201-1D); the first semi-elliptical arc groove (201-1A) and the second semi-elliptical arc groove (201-1B) serve as a pair of semi-elliptical arc grooves (201-1) of an upper layer; the first semi-elliptical arc groove (201-1A) and the second semi-elliptical arc groove (201-1B) serve as a pair of semi-elliptical arc grooves (201-1) of an upper layer; the first semi-elliptical arc groove (201-1C) and the fourth semi-elliptical arc groove (201-1D) are provided. The portion between the circular arc groove (201-1A) and the second semi-elliptical arc groove (201-1B) is a first connecting rib (210-1), the third semi-elliptical arc groove (201-1C) and the fourth semi-elliptical arc groove (201-1D) serve as a pair of semi-elliptical arc grooves (201-1) in a lower layer, the portion between the third semi-elliptical arc groove (201-1C) and the fourth semi-elliptical arc groove (201-1D) is a second connecting rib (210-2), and the projections of the first connecting rib (210-1) and the second connecting rib (210-2) on a horizontal plane are vertical; The outer ring of the first bearing (204) is threadedly fixed to the output flange (202), and the output flange (202) is threadedly fixed to the first gear ring (203).

4. The six-dimensional adjustment frame for a large-aperture optical sub-mirror according to claim 3, characterized in that: The three spiral transmission devices (200) are respectively a first spiral transmission device (2), a second spiral transmission device (3) and a third spiral transmission device (4); the adjustment stroke of each spiral transmission device (200) along the Z axis is 10 mm, and the minimum adjustable axial displacement of each spiral transmission device (200) is 1 μm; The first flat flexible joint (21) of the first screw transmission device (2) and the second flat flexible joint (31) of the second screw transmission device (3) push the bottom support seat (1) to move upward along the Z axis, and the third flat flexible joint (41) of the third screw transmission device (4) pushes the bottom support seat (1) to move downward along the Z axis, and the minimum adjustable pitch angle of the sub-mirror on the top of the bottom support seat (1) around the X and Y axes reaches 1".

5. The six-dimensional adjustment frame for a large-aperture optical sub-mirror according to claim 4, characterized in that: The X-axis planar motion device (6) comprises a first rack (601), a first roller (602), a first motor mounting plate (603), a first motor assembly (604), an X-axis guide rail platform (605) and a first guide rail slider assembly (606), wherein the first rack (601) is connected to the X-axis guide rail platform (605), the first rack (601) is meshed with the first roller (602), the first roller (602) is axially fixedly connected to the first motor assembly (604), the bottom end of the first motor mounting plate (603) is connected to the first motor assembly (604), and the top end of the first motor mounting plate (603) is connected to the third boss (502) at the bottom of the three-degree-of-freedom plate (5); The first guide rail and slider assembly (606) comprises a first guide rail (606-1) and a first slider (606-2) arranged along the X-axis, wherein the first guide rail (606-1) is arranged on the X-axis guide rail platform (605), the first slider (606-2) is connected to the second boss (501) at the bottom of the three-degree-of-freedom plate (5), and the first slider (606-2) is movably connected to the first guide rail (606-1).

6. The six-dimensional adjustment frame for a large-aperture optical sub-mirror according to claim 5, characterized in that: The Y-axis planar motion device (7) comprises a second rack (701), a second roller (702), a second motor mounting plate (703), a second motor assembly (704), a Y-axis guide rail platform (705) and a second guide rail slider assembly (706), wherein the second rack (701) is connected to the Y-axis guide rail platform, the second rack (701) is meshed with the second roller (702), the second roller (702) is axially fixedly connected to the second motor assembly (704), the bottom end of the second motor mounting plate (703) is connected to the second motor assembly (704), and the top end of the second motor mounting plate (703) is connected to the fifth boss (605-2) at the bottom of the X-axis guide rail platform (605); The second guide rail slider assembly (706) includes a second guide rail (706-1) and a second slider (706-2) arranged along the Y-axis, the second guide rail (706-1) is arranged on the Y-axis guide rail platform (705), the second slider (706-2) is connected to the fourth boss (605-1) at the bottom of the X-axis guide rail platform (605), and the second slider (706-2) is movably connected to the second guide rail (706-1).

7. A six-dimensional adjustment frame for a large-aperture optical sub-mirror according to claim 6, characterized in that: The adjustable stroke of the X-axis plane motion device (6) and the Y-axis plane motion device (7) is 40 mm, and the minimum adjustable displacement of the X-axis plane motion device (6) and the Y-axis plane motion device (7) is 4 μm; The bottom end of the first motor mounting plate (603) is threadedly fixedly connected to the first motor assembly (604), and the bottom end of the second motor mounting plate (703) is threadedly fixedly connected to the second motor assembly (704); The top of the first motor mounting plate (603) is threadedly fixedly connected to the third boss (502) of the three-degree-of-freedom plate (5); the top of the second motor mounting plate (703) is threadedly fixedly connected to the fifth boss (605-2) at the bottom of the X-axis guide rail platform (605).

8. The six-dimensional adjustment frame for a large-aperture optical sub-mirror according to claim 7, characterized in that: The large gear ring roller rotating device (8) comprises a third motor assembly (801), a third roller (802), a large gear ring assembly (803), a bottom plate (804), a second bearing (805) and a turntable (806), wherein the outer ring of the second bearing (805) is a stator, the inner ring of the second bearing (805) is a rotor, the third motor assembly (801) and the outer ring of the second bearing (805) are connected to the bottom plate (804), the third motor assembly (801) is axially fixedly connected to the third roller (802), the third roller (802) is meshed with the large gear ring assembly (803), the large gear ring assembly (803) is connected to the turntable (806), the turntable (806) is connected to the inner ring of the second bearing (805), and the top of the turntable (806) is connected to the sixth boss (705-1) at the bottom of the Y-axis guide platform (705).

9. The six-dimensional adjustment frame for a large-aperture optical sub-mirror according to claim 8, characterized in that: The outer ring of the second bearing (805) is threadedly fixed to the bottom plate (804), and the inner end surface of the second bearing (805) is threadedly fixed to the turntable (806); The large gear ring roller rotating device (8) drives the Y-axis guide platform (705) to rotate 360° around the Z axis, and the minimum adjustable rotation angle around the Z axis is 1″; First limiting parts (9-1) are provided on both sides of the X-axis guide rail platform (605), and the two first limiting parts (9-1) respectively correspond to the two ends of the first guide rail (606-1); second limiting parts (9-2) are provided on both sides of the Y-axis guide rail platform (705), and the two second limiting parts (9-2) respectively correspond to the two ends of the second guide rail (706-1).

10. A method for using a six-dimensional adjustment frame for a large-aperture optical sub-mirror, using the six-dimensional adjustment frame for a large-aperture optical sub-mirror in claim 9, characterized in that: The following steps are involved: One or more fourth motor components (209) in the three spiral transmission devices (200) are driven, and the corresponding fourth roller (208) and the corresponding first gear ring (203) are driven to rotate along the Z axis with the corresponding output flange (202) and the rotor of the first bearing (204), and the corresponding first cylinder (201-2) moves up and down along the Z axis with the flat flexible joint (201), so that the corresponding flat flexible joint (201) moves along the Z axis with the bottom support seat (1) or deflects around the X axis or around the Y axis, and the bottom support seat (1) causes the sub-mirror to move along the Z axis or deflect around the X axis or around the Y axis; and / or driving the first motor assembly (604), so that the first rack (601) and the first roller (602) are driven to drive the three-degree-of-freedom plate (5) and the bottom support seat (1) to move horizontally along the X-axis synchronously; and / or driving the second motor assembly (704), the second rack (701) and the second roller (702) to transmit, thereby driving the X-axis guide platform (605), the three-degree-of-freedom plate (5) and the bottom support seat (1) to move horizontally along the Y-axis synchronously; And / or drive the third motor assembly (801), the third roller (802) is transmitted, the third roller (802) and the large ring gear assembly (803) are transmitted, and the large ring gear assembly (803) drives the Y-axis guide platform (705), the X-axis guide platform (605), the three-degree-of-freedom plate (5) and the bottom support seat (1) to rotate synchronously around the Z axis through the turntable (806).

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