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A three-dimensional expandable cylindrical light shield with high shrinkage ratio

A cylindrical, hood technology, applied in optical and photographic filters, cameras, etc., can solve the problems of low deployment stiffness and short service life, and achieve long space life, high repeatability, and good repeatability. Effect

Active Publication Date: 2021-08-10
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology

[0003] The technical problem solved by the invention is: aiming at the problems of short service life and low unfolding rigidity of the existing shading technology in the current prior art, a three-dimensional expandable cylindrical shading cover with a high folding ratio is proposed, which overcomes the problem of the shading cover after deployment. Difficulties of low precision and poor repeatability

Method used

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  • A three-dimensional expandable cylindrical light shield with high shrinkage ratio
  • A three-dimensional expandable cylindrical light shield with high shrinkage ratio
  • A three-dimensional expandable cylindrical light shield with high shrinkage ratio

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Embodiment Construction

[0029] A three-dimensional expandable cylindrical hood with a high shrinkage ratio, which is used for shading the camera when the satellite in orbit is shooting, such as figure 1 As shown, it mainly includes a circumferential expansion mechanism 1, a longitudinal expansion mechanism 2, a self-locking mechanism 3, a skin 4, an expansion driving rope 5, and a skin connection line 6, wherein:

[0030] Such as figure 2 , Figure 4 As shown, the hoop expansion mechanism 1 includes a knuckle bracket 101, a middle connecting shaft 102, and an end connecting shaft 103. Each pair of knuckle brackets 101 is connected through the middle connecting shaft 102 arranged in the center, and the ends of each pair of knuckle brackets 101 pass through The end connecting shaft 103 is connected to the ends of the knuckle brackets 101 at the adjacent two ends, and the knuckle brackets 101 rotate around the middle connecting shaft 102 to realize the unfolding and folding of the mechanism; when full...

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Abstract

A three-dimensional expandable cylindrical sunshade with a high folding ratio, comprising a circumferential expansion mechanism (1), a longitudinal expansion mechanism (2), a self-locking mechanism (3), a skin (4), a deployment driving rope (5), a cover The skin connection line (6) uses an over-constrained radial expansion mechanism structure design to constrain each expansion unit. At the same time, a locking mechanism that can compensate for expansion is used to make the vertical expansion unit highly repeatable, which solves the problem of existing The shading technology has the problems of short service life and low deployment rigidity, and at the same time overcomes the difficulties of low precision and poor repeatability of the shading cover after deployment.

Description

technical field [0001] The invention relates to a three-dimensional expandable cylindrical shading cover with a high shrinkage ratio, which belongs to the field of space remote sensing camera shading covers. Background technique [0002] The unfolded hood is used for shading when shooting satellites in orbit. The existing expandable hood can be divided into inflatable and mechanical types according to the expansion method. The inflatable type cannot be used in orbit for ten years due to sealing problems. Even if the method of inflating and tempering is adopted, It has the problem of weak rigidity after deployment, and cannot adapt to the vibration caused by track change; most of the mechanical expandable hoods can realize one-dimensional and two-dimensional deployment, such as MITAR, Yardstick hoods, and three-dimensional expandable hoods. The accuracy is not easy to control, and the repeatability is poor. Contents of the invention [0003] The technical problem solved by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B11/04
Inventor 梁浩王立武王永滨朱谦戈嗣诚龙龙刘媛媛刘兴华冯蕊霍东阳
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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