CN114721200A - Space optical load lens hood assembly capable of being unfolded on track - Google Patents
Space optical load lens hood assembly capable of being unfolded on track Download PDFInfo
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- CN114721200A CN114721200A CN202210232402.9A CN202210232402A CN114721200A CN 114721200 A CN114721200 A CN 114721200A CN 202210232402 A CN202210232402 A CN 202210232402A CN 114721200 A CN114721200 A CN 114721200A
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- gear
- lead screw
- light shield
- lifting mechanism
- lifting
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
- G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses a space optical load hood assembly capable of being unfolded on a track, and belongs to the technical field of space optical loads. The spatial optical payload mask assembly comprises: the multistage light shield assembly comprises a first light shield, a second light shield, a third light shield and a fourth light shield which are sequentially nested from inside to outside and can be expanded axially; the multi-group gear-lead screw lifting mechanisms are uniformly distributed on the circumference of the multi-stage lens hood assembly and are used for driving the multi-stage lens hood assembly to axially expand and extend out; and a driving assembly for driving the gear-screw lifting mechanism. The lens hood assembly adopts a gear-lead screw lifting mechanism to realize the compression and the expansion of the assembly, overcomes the limitation of the length of the rocket fairing and reduces the load launching cost. The lifting mechanism has self-locking capacity, and meets the requirement on the rigidity of the mechanism during rocket launching; the invention solves the problems that the extensible lens hood in the prior art is mostly unfolded once and the length of the lens hood can not be adjusted after the extensible lens hood is unfolded.
Description
Technical Field
The invention relates to the technical field of space optical loads, in particular to a space optical load shading cover assembly capable of being unfolded on a track.
Background
Signals detected by the space optical load are mostly dark and weak light signals, stray light can interfere sensitive weak light signals during detection, the imaging quality of the system is reduced, and the stray light signals can submerge target signals when the system is serious, so that the load cannot work normally. On the other hand, the radiated heat causes the internal thermal equilibrium to be broken, degrading the imaging quality of the optical load. Space optics loads therefore require light shields to perform the functions of stray light suppression and temperature control.
With the rapid development of space science and technology, the space optical load develops towards the direction of large visual field and high resolution, and the increase of the aperture of the optical load is one of effective methods for increasing the resolution of the optical load. On the other hand, the effect of the light shield on stray light and heat flux increases with increasing length of the light shield. Due to the size limitation of the fairing of the launch vehicle, the large-sized light shield cannot be placed in the fairing of the launch vehicle, and a light shield structure with an on-orbit unfolding function is urgently needed.
At present, space optics load lens hood is mostly fixed structure, and the lens hood structure that can expand on the rail uses relatively fewly, has to be difficult to repeated expansion, stability is lower, do not possess self-locking function scheduling problem, like disclose a be used for static track remote sensing camera deployable lens hood device in the patent document that publication number is CN107608070B, this scheme proposes one kind and realizes multistage telescopic expansion through stay cord sleeve actuating mechanism, because the inherent characteristic of stay cord: the telescopic light shade device can only bear tension but not pressure, so that the on-rail working stability of the telescopic light shade device is low, and in the process of load working, the stay cord sleeve driving mechanism is required to be in a working state to ensure that the stay cord is in a tensioning state, and the power consumption of the telescopic light shade device is high. Patent document CN105938232B proposes a deployable light shield for GEO laser communication using memory alloy drive. Patent document CN113433771A discloses a pop-up shade device applied to a cube-star camera, which can only realize one unfolding process and cannot be restored after unfolding. Patent document CN106773456A proposes a method for fixing and sealing a plurality of light-shielding wall surface components by driving a sealing component by inflation.
Disclosure of Invention
The invention aims to solve the problems that the space optical load light shield assembly is difficult to repeatedly unfold, low in stability, free of self-locking function and the like in the prior art by providing the space optical load light shield assembly which can adopt a folding and compressing mode in the launching process and unfold on a rail when a load enters the rail to work.
In order to achieve the purpose, the specific technical scheme of the invention is as follows:
an on-track deployable space optical load mask assembly, the space optical load mask assembly comprising: the device comprises a multi-stage lens hood assembly, a plurality of groups of gear-lead screw lifting mechanisms and a driving assembly;
the multistage light shield assembly comprises a first light shield, a second light shield, a third light shield and a fourth light shield which are sequentially nested from inside to outside and can be expanded axially, flanges are respectively fixed at the bottoms of the first light shield, the second light shield, the third light shield and the fourth light shield, and lifting mechanism mounting plates are fixed on the flanges;
the multiple groups of gear-lead screw lifting mechanism assemblies are uniformly distributed on the circumference of the multistage lens hood assembly, and each group of gear-lead screw lifting mechanism assemblies comprises: the device comprises a first gear-lead screw lifting mechanism, a second gear-lead screw lifting mechanism and a third gear-lead screw lifting mechanism, wherein a first light shield and a second light shield are connected through the first gear-lead screw lifting mechanism, the second light shield and the third light shield are connected through the second gear-lead screw lifting mechanism, the third light shield and a fourth light shield are connected through the third gear-lead screw lifting mechanism, and the first gear-lead screw lifting mechanism, the second gear-lead screw lifting mechanism and the third gear-lead screw lifting mechanism are sequentially in transmission connection; the second light shield, the third light shield and the fourth light shield are driven to be unfolded and extended along the axial direction;
the driving assembly is fixed on a flange below the first light shield and used for driving the first gear-lead screw lifting mechanism.
Further, the driving assembly includes: the motor is fixed on a flange at the bottom of the first light shield through the motor mounting plate, and the output end of the motor is fixedly connected with the electric transmission gear;
the large idler wheel support frame is arranged at the position of a flange at the bottom of the fourth light shield and used for mounting a large idler wheel, so that the large idler wheel can only rotate circumferentially in the large idler wheel support frame, and gear teeth are arranged on the periphery of the large idler wheel and meshed with the electric transmission gear.
Further, the first gear-screw lifting mechanism includes: the first fixed end gear is fixedly connected with the first lead screw, and the first fixed end gear is meshed with the large idle gear;
the first lifting end gear is arranged above the lifting mechanism mounting plate at the bottom of the second light shield, the first lead screw penetrates through the lifting mechanism mounting plate at the bottom of the second light shield, the first lifting end gear is sleeved on the first lead screw and is connected with the first lead screw through a thread pair, and the gear fixing frame is arranged above the first lifting end gear and is fixed on the lifting mechanism mounting plate at the bottom of the second light shield, so that the first lifting end gear can indirectly drive the second light shield to move synchronously with the first lifting end gear;
the second gear-lead screw lifting mechanism has the same structure as the first gear-lead screw lifting mechanism, and comprises: the bearing is fixedly installed on a lifting mechanism installation plate at the bottom of the second light shield, the second lead screw is arranged along the vertical direction, the lower end of the second lead screw is installed on the bearing inner ring, the second fixed end gear is fixedly connected with the second lead screw, and the second fixed end gear is meshed with the first lifting end gear;
the second lifting end gear is arranged above the lifting mechanism mounting plate at the bottom of the third light shield, the second lead screw penetrates through the lifting mechanism mounting plate at the bottom of the third light shield, the second lifting end gear is sleeved on the second lead screw and is connected with the second lead screw through a thread pair, and the gear fixing frame is arranged above the second lifting end gear and is fixed on the lifting mechanism mounting plate at the bottom of the third light shield, so that the second lifting end gear can indirectly drive the third light shield to move synchronously with the third light shield;
the third gear-lead screw lifting mechanism and the second gear-lead screw lifting mechanism have the same structure and comprise: the bearing is fixedly installed on a lifting mechanism installation plate at the bottom of the third light shield, the third lead screw is arranged along the vertical direction, the lower end of the third lead screw is installed on the bearing inner ring, the third fixed end gear is fixedly connected with the third lead screw, and the third fixed end gear is meshed with the second lifting end gear;
the third lifting end gear is arranged above the lifting mechanism mounting plate at the bottom of the fourth light shield, the third lead screw penetrates through the lifting mechanism mounting plate at the bottom of the fourth light shield, the third lifting end gear is sleeved on the third lead screw and is connected with the third lead screw through a thread pair, and the gear fixing frame is arranged above the third lifting end gear and fixed on the lifting mechanism mounting plate at the bottom of the fourth light shield, so that the third lifting end gear indirectly drives the fourth light shield to move synchronously.
Further, the spatial optical payload hood assembly further comprises:
the first lead screw fixing frame is arranged at the upper end of a first lead screw in each group of gear-lead screw lifting mechanisms and used for limiting the position of the first lead screw;
the second lead screw fixing frame is arranged at the upper end of a second lead screw in each group of gear-lead screw lifting mechanisms and used for limiting the position of the second lead screw;
and the third lead screw fixing frame is arranged at the upper end of a third lead screw in each group of gear-lead screw lifting mechanisms and is used for limiting the position of the third lead screw.
Furthermore, the bearing is fixed on the lifting mechanism mounting plate through an outer bearing pressing ring and an inner bearing pressing ring.
Furthermore, the gear-lead screw lifting mechanisms are at least three groups.
The invention has the advantages of
The invention discloses a space optical load lens hood assembly capable of being unfolded on a track, which has the following beneficial effects compared with the prior art:
(1) the multistage light shield assembly which is mutually nested to form the axially expandable structure adopts an axial compression scheme in the load launching process, and automatically expands after entering the rail. The limit of the length of the rocket fairing is overcome, and the load launching cost is reduced; the broken limitation of the vehicle makes the optical load of the large-caliber space practical.
(2) The lens hood assembly of the invention adopts a gear-lead screw lifting mechanism to realize the compression and the expansion of the assembly, realizes self-locking by utilizing a thread pair of the mechanism, does not need to additionally increase a locking mechanism of the lens hood, and can ensure that the lens hood assembly has higher dynamic rigidity in the launching process.
(3) The lens hood assembly capable of being unfolded in orbit can dynamically adjust the length of the lens hood according to the satellite operation orbit angle and the satellite posture after being unfolded in orbit, and simultaneously solves the problems that the extensible lens hood in the prior art is mostly unfolded once and the length of the lens hood cannot be adjusted after being unfolded.
Drawings
FIG. 1 is a schematic view of the fully deployed spatial optical loadlock assembly of the present invention;
FIG. 2 is a partially expanded schematic view of the spatial optical loadlock lens assembly provided in accordance with the present invention;
FIG. 3 is a schematic view of the fully compressed configuration of the spatial optical loadlock lens assembly provided in accordance with the present invention;
FIG. 4 is a structural schematic diagram of a fully extended state of the gear-lead screw lifting mechanism provided by the present invention;
FIG. 5 is a schematic view of a partial structure of a fully compressed state of the gear-lead screw lifting mechanism provided by the present invention;
FIG. 6 is a partial structural view of the gear-lead screw lifting mechanism provided in the present invention in a partially unfolded state;
fig. 7 is an internal sectional view of the gear-lead screw elevating mechanism provided in the present invention.
In the figure, the position of the first and second end faces,
1. a first light shield; 2. a second light shield; 3. a third light shield; 4. a fourth light shield; 5. a lifting mechanism mounting plate; 6. a drive assembly; 7. a gear-lead screw lifting mechanism assembly; 8. a flange; 9. a first lead screw fixing frame; 10. a second lead screw fixing frame; 11. a third lead screw fixing frame;
61. a motor; 62. a motor mounting plate; 63. an electric drive gear; 64. a large idler wheel support frame; 65. a large idler pulley;
71. a first gear-lead screw lifting mechanism; 72. a second gear-lead screw lifting mechanism; 73. a third gear-lead screw lifting mechanism;
711. a first fixed end gear; 712. a bearing; 713. a first lead screw; 714. a bearing outer pressing ring; 715. pressing rings in the bearing; 716. a first lift end gear; 717. a gear fixing frame;
721. a second fixed end gear; 722. a second lifting end gear; 723. a second lead screw;
731. a third fixed end gear; 732. a third lifting end gear; 733. and a third lead screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, an on-track deployable spatial optical load mask assembly includes: a multi-stage lens hood assembly, a plurality of groups of gear-lead screw lifting mechanism assemblies 7 and a driving assembly 6,
the multistage light shield assembly comprises a first light shield 1, a second light shield 2, a third light shield 3 and a fourth light shield 4 which are sequentially nested from outside to inside and can be expanded axially, wherein flanges 8 are respectively fixed at the bottoms of the first light shield 1, the second light shield 2, the third light shield 3 and the fourth light shield 4, and lifting mechanism mounting plates 5 are fixed on the flanges 8; and
the multiple groups of gear-lead screw lifting mechanism assemblies 7 are uniformly distributed on the circumference of the multistage lens hood assembly, and each group of gear-lead screw lifting mechanism assemblies 7 comprises: the sun shade control device comprises a first gear-screw lifting mechanism 71, a second gear-screw lifting mechanism 72 and a third gear-screw lifting mechanism 73, wherein a first light shade 1 and a second light shade 2 are connected through the first gear-screw lifting mechanism 71, the second light shade 2 and a third light shade 3 are connected through the second gear-screw lifting mechanism 72, the third light shade 3 and a fourth light shade 4 are connected through the third gear-screw lifting mechanism 73, and the first gear-screw lifting mechanism 71, the second gear-screw lifting mechanism 72 and the third gear-screw lifting mechanism 73 are sequentially in transmission connection; the second light shield 2, the third light shield 3 and the fourth light shield 4 are driven to extend and extend along the axial direction; further, the first gear-screw lifting mechanism 71 includes: the first fixed end gear 711, the bearing 712, the first lead screw 713, the first lifting end gear 716 and the gear fixing bracket 717, the bearing 712 is installed and fixed on the lifting mechanism installation plate 5 at the bottom of the first light shield 1, the first lead screw 713 is arranged along the vertical direction, the lower end of the first lead screw is installed on the inner ring of the bearing 712, the first fixed end gear 711 is fixedly connected with the first lead screw 713, and the first fixed end gear 711 and the large idle gear 65 are meshed with each other; further, the bearing 712 is fixed to the lifting mechanism mounting plate 5 by a bearing outer clamping ring 714 and a bearing inner clamping ring 715. All the lead screws (the first lead screw 713, the second lead screw 723 and the third lead screw 733) used in the application are connected with the lifting mechanism mounting plate 5 through bearings 712, and the fixing modes are all fixed through the bearing outer pressing ring 714 and the bearing inner pressing ring 715.
The first lifting end gear 716 is arranged above the lifting mechanism mounting plate 5 at the bottom of the second light shield 2, the first lead screw 713 penetrates through the lifting mechanism mounting plate 5 at the bottom of the second light shield 2, the first lifting end gear 716 is sleeved on the first lead screw 713 and is connected with the first lead screw 713 through a thread pair, and the gear fixing frame 717 is arranged above the first lifting end gear 716 and is fixed on the lifting mechanism mounting plate 5 at the bottom of the second light shield 2, so that the first lifting end gear 716 indirectly drives the second light shield 2 to move synchronously with the second light shield 2;
the second gear-lead screw lifting mechanism 72 has the same structure as the first gear-lead screw lifting mechanism 71, and includes: a second fixed end gear 721, a second lifting end gear 722, a second screw 723, a gear fixing bracket 717 and a bearing 712, wherein the bearing 712 is installed and fixed on the lifting mechanism installation plate 5 at the bottom of the second light shield 2, the second screw 723 is arranged along the vertical direction, the lower end of the second screw 723 is installed on the inner ring of the bearing 712, the second fixed end gear 721 is fixedly connected with the second screw 723, and the second fixed end gear 721 is engaged with the first lifting end gear 716;
the second lifting end gear 722 is arranged above the lifting mechanism mounting plate 5 at the bottom of the third light shield 3, the second lead screw 723 passes through the lifting mechanism mounting plate 5 at the bottom of the third light shield 3, the second lifting end gear 722 is sleeved on the second lead screw 723 and is connected with the second lead screw 723 through a thread pair, and the gear fixing frame 717 is arranged above the second lifting end gear 722 and is fixed on the lifting mechanism mounting plate 5 at the bottom of the third light shield 3, so that the second lifting end gear 722 can indirectly drive the third light shield 3 to move synchronously with the third light shield 3;
the third gear-lead screw lifting mechanism 73 has the same structure as the second gear-lead screw lifting mechanism 72, and includes: a third fixed end gear 731, a third lifting end gear 732, a third screw 733, a gear fixing rack 717 and a bearing 712, wherein the bearing 712 is fixedly installed on the lifting mechanism installation plate 5 at the bottom of the third light shield 3, the third screw 733 is arranged along the vertical direction, the lower end of the third screw is installed on the inner ring of the bearing 712, the third fixed end gear 731 is fixedly connected with the third screw 733, and the third fixed end gear 731 is engaged with the second lifting end gear 722;
the third lifting end gear 732 is arranged above the lifting mechanism mounting plate 5 at the bottom of the fourth light shield 4, the third lead screw 733 penetrates through the lifting mechanism mounting plate 5 at the bottom of the fourth light shield 4, the third lifting end gear 732 is sleeved on the third lead screw 733 and is connected with the third lead screw 733 through a thread pair, and the gear fixing frame 717 is arranged above the third lifting end gear 732 and is fixed on the lifting mechanism mounting plate 5 at the bottom of the fourth light shield 4, so that the fourth light shield 4 can be indirectly driven by the third lifting end gear 732 to move synchronously with the third lifting end gear 732.
The driving assembly 6 is fixed on a flange 8 below the first light shield 1 and used for driving the first gear-lead screw lifting mechanism 71; further, the driving assembly 6 includes: the light shield comprises a motor 61, a motor mounting plate 62, an electric transmission gear 63, a large idle gear support frame 64 and a large idle gear 65, wherein the motor 61 is fixed on a flange 8 at the bottom of the first light shield 1 through the motor mounting plate 62, and the output end of the motor 61 is fixedly connected with the electric transmission gear 63;
the large idle wheel support frame 64 is installed at the position of the flange 8 at the bottom of the fourth light shield 4 and is used for installing the large idle wheel 65, so that the large idle wheel 65 can only rotate circumferentially in the large idle wheel support frame 64, and gear teeth are arranged on the periphery of the large idle wheel 65 and are meshed with the electric transmission gear 63.
Further, the spatial optical payload hood assembly further comprises:
the first lead screw fixing frame 9 is arranged at the upper end of the first lead screw 713 in each group of gear-lead screw lifting mechanism assemblies 7, and is used for limiting the position of the first lead screw 713;
the second lead screw fixing frame 10 is arranged at the upper end of a second lead screw 723 in each group of gear-lead screw lifting mechanism assemblies 7 and used for limiting the position of the second lead screw 723;
and the third lead screw fixing frame 11 is arranged at the upper end of a third lead screw 733 in each group of gear-lead screw lifting mechanism assemblies 7 and used for limiting the position of the third lead screw 733.
Further, the bearing 712 is fixed to the lifting mechanism mounting plate 5 by a bearing outer clamping ring 714 and a bearing inner clamping ring 715.
Further, the gear-lead screw lifting mechanism assemblies 7 are at least three groups.
In the working process, the motor 61 is started to drive the electric transmission gear 62 to rotate, the large idle gear 65 is indirectly driven to rotate, the first fixed end gear 711 is driven to rotate, and the first lead screw 713, the second lead screw 723 and the third lead screw 733 as well as the first lifting end gear 716, the second fixed end gear 721, the second lifting end gear 722, the third fixed end gear 731 and the third lifting end gear 732 are driven by the first fixed end gear 711 to rotate simultaneously, wherein the first lifting end gear 716, the second lifting end gear 722 and the third lifting end gear 732 respectively move upwards along the first lead screw 713, the second lead screw 723 and the third lead screw 733 and simultaneously drive the second light shield 2, the third light shield 3 and the fourth light shield 4 to move upwards and unfold; the start and stop of the motor 61 can be controlled at any time according to specific conditions, so that the shade assembly extends to a required position, the motor 61 can be a servo motor, when the shade assembly needs to be retracted, the motor 61 can be controlled to rotate reversely, and then the first lead screw 713, the second lead screw 723, the third lead screw 733, the first lifting end gear 716, the second fixed end gear 721, the second lifting end gear 722, the third fixed end gear 731, and the third lifting end gear 732 perform reverse rotation movement at the same time, wherein the first lifting end gear 716, the second lifting end gear 722, and the third lifting end gear 732 respectively move downwards along the first lead screw 713, the second lead screw 723, and the third lead screw 733, and simultaneously drive the second shade 2, the third shade 3, and the fourth shade 4 to retract downwards.
The thread pairs among the first lead screw 13, the second lead screw 723, the third lead screw 733, the first lifting end gear 716, the second lifting end gear 722, and the third lifting end gear 732 should satisfy the following relations:
λ≤ρ (1)
wherein λ is a lead angle, i.e. a pitch diameter d of the thread2The included angle between the tangent line of the spiral line on the cylinder and the axial vertical plane of the thread; ρ is the friction angle of the thread.
When the thread pair meets the formula (1), the thread has a self-locking characteristic, so that a locking mechanism of the light shield does not need to be additionally added, namely, the self-locking function is realized, the light shield assembly has high dynamic rigidity in the emission process, and the vibration impact in the emission process can be borne.
Claims (6)
1. An in-track deployable spatial optical load mask assembly, comprising:
the multi-stage light shield assembly comprises a first light shield (1), a second light shield (2), a third light shield (3) and a fourth light shield (4) which are sequentially nested from outside to inside and can be expanded axially, wherein flanges (8) are respectively fixed at the bottoms of the first light shield (1), the second light shield (2), the third light shield (3) and the fourth light shield (4), and lifting mechanism mounting plates (5) are respectively fixed on the flanges (8); and
a plurality of sets of gear-lead screw lifting mechanism assemblies (7), the plurality of sets of gear-lead screw lifting mechanism assemblies (7) being evenly distributed on the circumference of the multistage lens hood assembly, each set of gear-lead screw lifting mechanism assemblies (7) comprising: the device comprises a first gear-lead screw lifting mechanism (71), a second gear-lead screw lifting mechanism (72) and a third gear-lead screw lifting mechanism (73), wherein the first light shield (1) and the second light shield (2) are connected through the first gear-lead screw lifting mechanism (71), the second light shield (2) and the third light shield (3) are connected through the second gear-lead screw lifting mechanism (72), the third light shield (3) and the fourth light shield (4) are connected through the third gear-lead screw lifting mechanism (73), and the first gear-lead screw lifting mechanism (71), the second gear-lead screw lifting mechanism (72) and the third gear-lead screw lifting mechanism (73) are sequentially in transmission connection; the second light shield (2), the third light shield (3) and the fourth light shield (4) are driven to be unfolded and extended along the axial direction;
the driving assembly (6) is fixed on a flange (8) below the first light shield (1) and used for driving the first gear-lead screw lifting mechanism (71).
2. An on-track deployable spatial optical load mask assembly according to claim 1, wherein the drive assembly (6) comprises: the device comprises a motor (61), a motor mounting plate (62), an electric transmission gear (63), a large idle gear support frame (64) and a large idle gear (65), wherein the motor (61) is fixed on a flange (8) at the bottom of the first light shield (1) through the motor mounting plate (62), and the output end of the motor (61) is fixedly connected with the electric transmission gear (63);
the large idle wheel support frame (64) is arranged at the position of a flange (8) at the bottom of the fourth light shield (4) and used for mounting the large idle wheel (65), so that the large idle wheel (65) can only rotate circumferentially in the large idle wheel support frame (64), and gear teeth are arranged on the periphery of the large idle wheel (65) and meshed with the electric transmission gear (63).
3. An in-track deployable spatial optical load mask assembly according to claim 2, wherein the first gear-lead screw lift mechanism (71) comprises: the device comprises a first fixed end gear (711), a bearing (712), a first lead screw (713), a first lifting end gear (716) and a gear fixing frame (717), wherein the bearing (712) is fixedly installed on a lifting mechanism installing plate (5) at the bottom of the first light shield (1), the first lead screw (713) is arranged along the vertical direction, the lower end of the first lead screw is installed on an inner ring of the bearing (712), the first fixed end gear (711) is fixedly connected with the first lead screw (713), and the first fixed end gear (711) is meshed with the large idle gear (65);
the first lifting end gear (716) is arranged above the lifting mechanism mounting plate (5) at the bottom of the second light shield (2), the first lead screw (713) penetrates through the lifting mechanism mounting plate (5) at the bottom of the second light shield (2), the first lifting end gear (716) is sleeved on the first lead screw (713) and is connected with the first lead screw (713) through a thread pair, the gear fixing frame (717) is arranged above the first lifting end gear (716) and is fixed on the lifting mechanism mounting plate (5) at the bottom of the second light shield (2), and the first lifting end gear (716) can indirectly drive the second light shield (2) to move synchronously with the first lifting end gear (716);
the second gear-lead screw lifting mechanism (72) has the same structure as the first gear-lead screw lifting mechanism (71), and comprises: the second fixed end gear (721), the second lifting end gear (722), a second lead screw (723), a gear fixing frame (717) and a bearing (712), wherein the bearing (712) is fixedly installed on a lifting mechanism installing plate (5) at the bottom of the second light shield (2), the second lead screw (723) is arranged along the vertical direction, the lower end of the second lead screw is installed on an inner ring of the bearing (712), the second fixed end gear (721) is fixedly connected with the second lead screw (723), and the second fixed end gear (721) is meshed with the first lifting end gear (716);
the second lifting end gear (722) is arranged above the lifting mechanism mounting plate (5) at the bottom of the third light shield (3), the second lead screw (723) penetrates through the lifting mechanism mounting plate (5) at the bottom of the third light shield (3), the second lifting end gear (722) is sleeved on the second lead screw (723) and is connected with the second lead screw (723) through a thread pair, and the gear fixing frame (717) is arranged above the second lifting end gear (722) and is fixed on the lifting mechanism mounting plate (5) at the bottom of the third light shield (3), so that the second lifting end gear (722) indirectly drives the third light shield (3) to move synchronously with the third light shield;
the third gear-lead screw lifting mechanism (73) has the same structure as the second gear-lead screw lifting mechanism (72), and comprises: a third fixed end gear (731), a third lifting end gear (732), a third screw (733), a gear fixing frame (717) and a bearing (712), wherein the bearing (712) is fixedly installed on a lifting mechanism installing plate (5) at the bottom of the third light shield (3), the third screw (733) is arranged along the vertical direction, the lower end of the third screw is installed on an inner ring of the bearing (712), the third fixed end gear (731) is fixedly connected with the third screw (733), and the third fixed end gear (731) is meshed with the second lifting end gear (722);
the third lifting end gear (732) is arranged above the lifting mechanism mounting plate (5) at the bottom of the fourth light shield (4), the third lead screw (733) penetrates through the lifting mechanism mounting plate (5) at the bottom of the fourth light shield (4), the third lifting end gear (732) is sleeved on the third lead screw (733) and is connected with the third lead screw (733) through a thread pair, the gear fixing frame (717) is arranged above the third lifting end gear (732) and is fixed on the lifting mechanism mounting plate (5) at the bottom of the fourth light shield (4), and the third lifting end gear (732) can indirectly drive the fourth light shield (4) to move synchronously with the fourth light shield (4).
4. An in-track deployable spatial optical load mask assembly as claimed in claim 3, further comprising:
the first lead screw fixing frame (9), the first lead screw fixing frame (9) is arranged at the upper end of a first lead screw (713) in each group of gear-lead screw lifting mechanism assemblies (7) and is used for limiting the position of the first lead screw (713);
the second lead screw fixing frame (10) is arranged at the upper end of a second lead screw (723) in each group of gear-lead screw lifting mechanism assemblies (7) and used for limiting the position of the second lead screw (723);
and the third lead screw fixing frame (11) is arranged at the upper end of a third lead screw (733) in each group of gear-lead screw lifting mechanism assemblies (7) and used for limiting the position of the third lead screw (733).
5. An on-track deployable spatial optical load mask assembly according to claim 3, wherein the bearing (712) is secured to the lift mechanism mounting plate (5) by a bearing outer clamping ring (714) and a bearing inner clamping ring (715).
6. An on-track deployable space optic load mask assembly according to claim 3, wherein the gear-lead screw elevator assembly (7) is of at least three sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210232402.9A CN114721200B (en) | 2022-03-09 | 2022-03-09 | Space optical load light shield assembly capable of being unfolded in orbit |
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| Application Number | Priority Date | Filing Date | Title |
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