CN214325404U - Synchronous extending arm type deployable lens hood - Google Patents
Synchronous extending arm type deployable lens hood Download PDFInfo
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- CN214325404U CN214325404U CN202022665800.9U CN202022665800U CN214325404U CN 214325404 U CN214325404 U CN 214325404U CN 202022665800 U CN202022665800 U CN 202022665800U CN 214325404 U CN214325404 U CN 214325404U
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Abstract
The patent discloses a synchronous extension arm-type deployable lens hood. The bottom ring of the light shield is connected with the top ring through two connecting rods, and the light shielding film is respectively connected with the top ring and the bottom ring. The two connecting rods are evenly distributed on the circumference, the motor driving components on the two connecting rods are connected with the bottom ring and the driving rod through rotating hinges, the driving rod is connected with the driven rod through rotating hinges, and the driven rod is connected with the top ring through rotating hinges. The rotating hinge comprises a rotating shaft, a bearing, a hinge upper seat, a hinge lower seat, a pin, a spring and a limiting screw, wherein one end of the rotating shaft is connected with the hinge upper seat through the bearing, the other end of the rotating shaft is connected with the hinge lower seat, the pin is pressed in the hinge lower seat through the spring, and the spring is fixed through the limiting screw. The light shield has a high folding-unfolding ratio, can be contracted during launching, reduces the space occupied by the light shield, is unfolded on the orbit after launching to form the light shield with a large length-diameter ratio, and improves the capability of satellite effective load for inhibiting stray light and external heat flow on the orbit.
Description
Technical Field
The patent relates to the field of satellite payloads, and in particular relates to a synchronously-extending arm-type deployable lens hood.
Background
For a geostationary satellite, stray light and heat flow are important factors influencing the imaging quality of the system, and particularly, sunlight entering the imaging system at midnight can cause severe temperature change, so that the accuracy of the system is reduced, and even devices are burnt. In order to ensure high stray light suppression capability, a light shield having a large length is required for shielding. However, due to the space constraints of rocket cowlings, the size of the light shield cannot be as large as desired. The expansion type light shield can be contracted when being emitted, is not limited by the space of the fairing, can be expanded after the orbit, and obtains better effect of inhibiting stray light and heat flow
Disclosure of Invention
In order to solve the problems existing in the prior art, the patent designs a synchronously extending arm type extensible sunshade.
The technical scheme adopted by the patent is as follows:
a synchronously-extending arm type extensible light shield is designed, the light shield is cylindrical and comprises a bottom ring 1, two connecting rods 2, a shading film 3 and a top ring 4, wherein the bottom ring 1 is connected with the top ring 4 through the two connecting rods 2, and the shading film 3 is respectively connected with the top ring 4 and the bottom ring 1. The two connecting rods 2 comprise motor driving components 2-1, rotating hinges 2-2, driving rods 2-3 and driven rods 2-4, wherein the motor driving components 2-1 are connected with the driving rods 2-3, and the driving rods 2-3 are connected with the driven rods 2-4 through the rotating hinges 2-2. The motor driving assembly 2-1 comprises a motor 2-1-1, a speed reducer 2-1-2, an angle sensor 2-1-3, a motor support 2-1-4 and a driving shaft 2-1-5, wherein one end of the motor 2-1-1 is connected with the speed reducer 2-1-2, the other end of the motor 2-1-1 is connected with the angle sensor 2-1-3, the motor driving assembly is connected with the motor support 2-1-4, and the driving shaft 2-1-5 is connected with the speed reducer 2-1-2. The rotating hinge 2-2 comprises a rotating shaft 2-2-1, a bearing 2-2-2, a hinge upper seat 2-2-3, a hinge lower seat 2-2-4, a pin 2-2-5, a spring 2-2-6 and a limit screw 2-2-7, wherein one end of the rotating shaft 2-2-1 is connected with the hinge upper seat 2-2-3 through the bearing 2-2-2, the other end of the rotating shaft is connected with the hinge lower seat 2-2-4, the pin 2-2-5 is pressed in the hinge lower seat 2-2-4 through the spring 2-2-6, and the spring 2-2-6 is fixed through the limit screw 2-2-7.
The bottom ring 1 is made of carbon fiber, is in a circular ring shape, has a square thin-wall hollow structure in cross section, and is embedded with a metal embedded part at the joint of the motor support 2-1-4 and the shading film 3;
the shading film 3 is made of a plurality of layers of thin films and is foldable and cylindrical, the inner side of the shading film is a black polyimide thin film, the middle of the shading film is polyimide silk cloth, the outer layer of the shading film is aluminum foil, and the three layers are bonded by silica gel;
the top ring 4 is made of carbon fiber, is in a circular ring shape, has a square thin-wall hollow structure in cross section, and is embedded with a metal embedded part at the joint of the hinge upper seat 2-2-3 and the shading film 3;
the driving rod 2-3 is made of carbon fiber and is of a hollow thin-wall circular tube structure, and metal joints are embedded at two ends of the driving rod;
the driven rods 2-4 are made of carbon fiber materials and are of hollow thin-wall circular tube structures, and metal connectors are embedded at two ends of the driven rods;
the speed reducer 2-1-2 is a worm gear speed reducer with a self-locking function;
the pin 2-2-5 is made of metal, the front end of the pin is provided with a conical guide surface, and the rear end of the pin is provided with a step for limiting.
Compared with the prior art, the beneficial effect of this patent is: the expansion type light shield can be contracted when being emitted, is not limited by the space of the fairing, is expanded after the orbit to form the light shield with larger length-diameter ratio, and obtains better effect of restraining stray light and heat flow.
Drawings
Fig. 1 is an expanded view of the light shield.
Fig. 2 is a light shield contraction view.
FIG. 3 is a view of two link assemblies
Fig. 4 is a diagram of a motor drive assembly.
Fig. 5 is a rotational hinge diagram.
Description of the labeling: 1-bottom ring, 2-two connecting rods, 3-light shielding film, 4-top ring, 2-1-motor driving component, 2-2-rotating hinge, 2-3-driving rod, 2-4-driven rod, 2-1-1-motor, 2-1-2-speed reducer, 2-1-3-angle sensor, 2-1-4-motor support, 2-1-5-driving shaft, 2-2-1-rotating shaft, 2-2-2-bearing, 2-2-3-hinge upper seat, 2-2-4-hinge lower seat, 2-2-5-pin, 2-2-6-spring, 2-2-7-limit screw.
Detailed Description
The embodiments of this patent are described in further detail with reference to the accompanying drawings and examples:
a synchronously-extending arm type extensible light shield is designed, the light shield is cylindrical and comprises a bottom ring 1, two connecting rods 2, a shading film 3 and a top ring 4, wherein the bottom ring 1 is connected with the top ring 4 through the two connecting rods 2, and the shading film 3 is respectively connected with the top ring 4 and the bottom ring 1. The two connecting rods 2 comprise motor driving components 2-1, rotating hinges 2-2, driving rods 2-3 and driven rods 2-4, wherein the motor driving components 2-1 are connected with the driving rods 2-3, and the driving rods 2-3 are connected with the driven rods 2-4 through the rotating hinges 2-2. The motor driving assembly 2-1 comprises a motor 2-1-1, a speed reducer 2-1-2, an angle sensor 2-1-3, a motor support 2-1-4 and a driving shaft 2-1-5, wherein one end of the motor 2-1-1 is connected with the speed reducer 2-1-2, the other end of the motor 2-1-1 is connected with the angle sensor 2-1-3, the motor driving assembly is connected with the motor support 2-1-4, and the driving shaft 2-1-5 is connected with the speed reducer 2-1-2. The rotating hinge 2-2 comprises a rotating shaft 2-2-1, a bearing 2-2-2, a hinge upper seat 2-2-3, a hinge lower seat 2-2-4, a pin 2-2-5, a spring 2-2-6 and a limit screw 2-2-7, wherein one end of the rotating shaft 2-2-1 is connected with the hinge upper seat 2-2-3 through the bearing 2-2-2, the other end of the rotating shaft is connected with the hinge lower seat 2-2-4, the pin 2-2-5 is pressed in the hinge lower seat 2-2-4 through the spring 2-2-6, and the spring 2-2-6 is fixed through the limit screw 2-2-7.
The bottom ring 1 is made of carbon fiber, is in a circular ring shape, has a square thin-wall hollow structure in cross section, and is embedded with a metal embedded part at the joint of the motor support 2-1-4 and the shading film 3;
the shading film 3 is made of a plurality of layers of thin films and is foldable and cylindrical, the inner side of the shading film is a black polyimide thin film, the middle of the shading film is polyimide silk cloth, the outer layer of the shading film is aluminum foil, and the three layers are bonded by silica gel;
the top ring 4 is made of carbon fiber, is in a circular ring shape, has a square thin-wall hollow structure in cross section, and is embedded with a metal embedded part at the joint of the hinge upper seat 2-2-3 and the shading film 3;
the driving rod 2-3 is made of carbon fiber and is of a hollow thin-wall circular tube structure, and metal joints are embedded at two ends of the driving rod;
the driven rods 2-4 are made of carbon fiber materials and are of hollow thin-wall circular tube structures, and metal connectors are embedded at two ends of the driven rods;
the speed reducer 2-1-2 is a worm gear speed reducer with a self-locking function, and can be self-locked when power is off;
the pin 2-2-5 is made of metal, the front end of the pin is provided with a conical guide surface, the rear end of the pin is provided with a step for limiting, and the pin can be pressed into a hole of the upper hinge seat 2-2-3 under the action of the spring 2-2-6 to realize position locking.
When the satellite is in a launching state, the two connecting rods 2 are folded to drive the shading film 3 to be recovered, and the shading cover is contracted. After the light shielding cover is launched on the rail, under the action of the motor driving assembly 2-1, three groups of two connecting rods 2 uniformly distributed on the circumference synchronously extend to drive the light shielding film 3 to be unfolded, so that the light shielding cover is unfolded.
Claims (8)
1. The utility model provides a but expansion arm-type deployment lens hood of synchronization, includes bottom ring (1), two connecting rods (2), photomask (3), apical ring (4), its characterized in that:
the bottom ring (1) is connected with the top ring (4) through two connecting rods (2), and the shading film (3) is respectively connected with the top ring (4) and the bottom ring (1); the two connecting rods (2) comprise motor driving components (2-1), rotating hinges (2-2), driving rods (2-3) and driven rods (2-4), wherein the motor driving components (2-1) are connected with the driving rods (2-3), and the driving rods (2-3) are connected with the driven rods (2-4) through the rotating hinges (2-2); the motor driving assembly (2-1) comprises a motor (2-1-1), a speed reducer (2-1-2), an angle sensor (2-1-3), a motor support (2-1-4) and a driving shaft (2-1-5), wherein one end of the motor (2-1-1) is connected with the speed reducer (2-1-2), the other end of the motor (2-1-1) is connected with the angle sensor (2-1-3), the assembly is connected with the motor support (2-1-4), and the driving shaft (2-1-5) is connected with the speed reducer (2-1-2); the rotating hinge (2-2) comprises a rotating shaft (2-2-1), a bearing (2-2-2), a hinge upper seat (2-2-3), a hinge lower seat (2-2-4), a pin (2-2-5), a spring (2-2-6) and a limit screw (2-2-7), wherein one end of the rotating shaft (2-2-1) is connected with the upper hinge seat (2-2-3) through a bearing (2-2-2), the other end of the hinge is connected with the lower hinge seat (2-2-4), the pin (2-2-5) is pressed in the lower hinge seat (2-2-4) by the spring (2-2-6), and the spring (2-2-6) is fixed by the limit screw (2-2-7).
2. The synchronously extendable arm deployable shade of claim 1, wherein: the bottom ring (1) is made of carbon fiber, is in a ring shape, has a square thin-wall hollow structure in cross section, and is embedded with a metal embedded part at the joint of the motor support (2-1-4) and the shading film (3).
3. The synchronously extendable arm deployable shade of claim 1, wherein: the shading film (3) is made of a plurality of layers of thin films and is foldable cylindrical, the inner side of the shading film is a black polyimide thin film, the middle of the shading film is polyimide silk cloth, the outer layer of the shading film is aluminum foil, and the three layers are bonded by silica gel.
4. The synchronously extendable arm deployable shade of claim 1, wherein: the top ring (4) is made of carbon fiber materials, is in a circular ring shape, has a square thin-wall hollow structure in cross section, and is embedded with metal embedded parts at the joint of the hinge upper seat (2-2-3) and the shading film (3).
5. The synchronously extendable arm deployable shade of claim 1, wherein: the driving rod (2-3) is made of carbon fiber and is of a hollow thin-wall circular tube structure, and metal joints are embedded at two ends of the driving rod.
6. The synchronously extendable arm deployable shade of claim 1, wherein: the driven rod (2-4) is made of carbon fiber and is of a hollow thin-wall circular tube structure, and metal connectors are embedded at two ends of the driven rod.
7. The synchronously extendable arm deployable shade of claim 1, wherein: the speed reducer (2-1-2) is a worm gear speed reducer with a self-locking function.
8. The synchronously extendable arm deployable shade of claim 1, wherein: the pin (2-2-5) is made of metal, the front end of the pin is provided with a conical guide surface, and the rear end of the pin is provided with a step for limiting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022665800.9U CN214325404U (en) | 2020-11-18 | 2020-11-18 | Synchronous extending arm type deployable lens hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022665800.9U CN214325404U (en) | 2020-11-18 | 2020-11-18 | Synchronous extending arm type deployable lens hood |
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| Publication Number | Publication Date |
|---|---|
| CN214325404U true CN214325404U (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022665800.9U Active CN214325404U (en) | 2020-11-18 | 2020-11-18 | Synchronous extending arm type deployable lens hood |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114721200A (en) * | 2022-03-09 | 2022-07-08 | 长光卫星技术股份有限公司 | Space optical load lens hood assembly capable of being unfolded on track |
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2020
- 2020-11-18 CN CN202022665800.9U patent/CN214325404U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114721200A (en) * | 2022-03-09 | 2022-07-08 | 长光卫星技术股份有限公司 | Space optical load lens hood assembly capable of being unfolded on track |
| CN114721200B (en) * | 2022-03-09 | 2023-08-18 | 长光卫星技术股份有限公司 | Space optical load light shield assembly capable of being unfolded in orbit |
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