CN109946812A - It is a kind of use at low temperature reflecting mirror shafting support and clamping device - Google Patents
It is a kind of use at low temperature reflecting mirror shafting support and clamping device Download PDFInfo
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- CN109946812A CN109946812A CN201910246101.XA CN201910246101A CN109946812A CN 109946812 A CN109946812 A CN 109946812A CN 201910246101 A CN201910246101 A CN 201910246101A CN 109946812 A CN109946812 A CN 109946812A
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Abstract
The reflecting mirror shafting support used at low temperature the invention discloses one kind and clamping device.The invention carries out the main support of mirror body and shafting by U-shaped frame, realizes its symmetric deformation at low temperature by installing crossbeam in U-shaped top of the trellis；By installing shafting in the inner hole of U-shaped frame two sides, the rotation of reflecting mirror is realized；Two sections of shaftings are respectively designed to fixed and move about；In two side opening of reflecting mirror, there is the abaculus of two-layer flexible structure using adhesive bonding, abaculus passes through screw and above-mentioned two sections of coupling of shaft system；Match between abaculus and mirror body and beats pin increase connectivity robustness.The device can be used for needing work under extremely low temperature, after experience vibration and shock environment, and still need to keep clamping and the support of good optical face type and high performance reflecting mirror；The device of the invention is suitable for the mechanism of pointing out of my cabin of spaceborne optical communication and the scanning directing mechanism reflecting mirror of deep space exploration.The apparatus structure is compact, and quality is light and handy, broad application temperature range, and mirror surface type is kept.
Description
Technical field:
The present invention relates to deep space optical detections and spaceborne optical communication field, and in particular to a kind of support of reflecting mirror shafting and dress
Clamp device, in particular to a kind of reflecting mirror shafting support used at low temperature and clamping device, it for being directed toward, scanning reflection
The shafting of mirror is made fixes with clamping.
Background technique:
Directional mirror is the core component of spaceborne optical communication and star-loaded optical remote sensing equipment.By driving directional mirror
One-dimensional/two-dimensional rotary, the tracking that remote (such as: between artificial satellite-ground, artificial satellite) optic terminal may be implemented are taken aim at
Standard can also realize the scanning imagery over the ground or phase shift compensation of optical remote sensing equipment to realize optical communication.
Directional mirror is commonly disposed to optical telescope front end, expands dynamic instrumentation/direction range of optical system.
Directional mirror is in addition to realizing optical path dynamic and being directed toward, it is also necessary to which its own guarantees good surface precision, to guarantee optical system
The overall wavefront error criterion and image quality of system.Directional mirror surface precision is deteriorated, and will result directly in the property of optical system
It can index decline.
Directional mirror is often installed in as preposition optical system due to its large-scale rotation and dynamic visual field
It outside satellite or rover, is directly exposed in outer space environment, bears severe temperature environment, usually the low temperature ring of extreme
Border.When the insufficient energy carries out heating and thermal insulation to it, how to guarantee the optics surface precision of directional mirror under low temperature
It becomes as crucial technical problem.
The limitation of load counterweight amount, makes simple material on the excessive temperature loading and star that the excessive temperature difference is formed
Thermally matched and shafting travelling end unloads, and can not efficiently solve problem.Need the excellent of special elasticity design and structural configuration
Change and further decrease temperature loading to the additional bending moment of mirror body and answer sharp effect, to make the face type essence of directional mirror under low temperature
Degree meets requirement.
Summary of the invention:
It is an object of the present invention to provide the directional mirror rotation axis systems that one kind can use under low-down temperature environment
Support and mirror body clamping device.How to design that a set of quality is extremely light and handy, structure is very compact, has and bear aircraft platforms band
While that comes tempestuously vibrates the energy benefit with shock loading, it can guarantee the good face type of directional mirror in low-temperature working
Precision is the technical problems to be solved by the invention.
The present invention using U-shaped frame carry out mirror body and shafting main support, by U-shaped top of the trellis install crossbeam realize its
Symmetric deformation under low temperature；By installing shafting in the inner hole of U-shaped frame two sides, the rotation of reflecting mirror is realized；Two sections of shaftings are set respectively
Fixed support and travelling support are counted into, fixing end with angular contact bearings by realizing, travelling end is fixed by inner ring, and outer ring is free
Self-aligning bearing is realized；In two side opening of reflecting mirror, there is the abaculus of two-layer flexible structure using adhesive bonding, abaculus passes through
Screw is connect with the shaft of above-mentioned two sections of shaftings；It is sold for the connectivity robustness for increasing abaculus and mirror body in-between with pin is broken
Nail is fitted close with abaculus, and with mirror body there are gap, gap is filled using resin.
Specific device is as shown in attached drawing 1~4.
1. fixed support shafting 2 and travelling support shafting 6 are separately fixed in U-shaped 1 two side opening of top of frame；The cross
Beam 3 is fixed by screws in U-shaped 1 top of frame, and matches and break pin；The mirror body abaculus 5 is fixed on reflecting mirror 4 by adhesive
In the inner hole of two sides, outer side end face is connect with fixed support shafting 2 and travelling support shafting 6 respectively；Described 7 one end of pin with
Mirror body abaculus 5 is fitted close, and the other end passes through the mesopore of 4 back side corresponding position of reflecting mirror, and fills asphalt mixtures modified by epoxy resin in gap location
Rouge.
2.U type frame 1 is made of the metal material matching with 4 thermal expansion coefficient of reflecting mirror, two heel post top drillings
It is used to support shafting installation, processing platform is used for and other systems for installing crossbeam 3, bottom centre's circular hole at the top of column circular arc
Optical path connection；
3. fixed support shafting 2 include shaft 2-1, bearing block 2-2, with angular contact bearings 2-3, internal screw thread pressing ring 2-4,
External screw thread pressing ring 2-5；It is mounted in bearing block 2-2 inner hole with angular contact bearings 2-3, in cycle surface and bearing block 2-2
It is closed by face paste in hole；Shaft 2-1 is penetrated with angular contact bearings 2-3 inner ring, and the shaft shoulder is bonded by face with bearing inner race end face；Interior spiral shell
Line pressing ring 2-4 and external screw thread pressing ring 2-5 screw in shaft 2-1 and bearing block 2-2 respectively, for determining with angular contact bearings 2-3
Position and pretightning force apply；
4. crossbeam 3 is made of material identical with U-shaped frame 1, it is configured as inverted U-shaped, is fixed by screws in U-shaped frame
1 top guarantees to be reliably connected with pin is broken after installation；
5. reflecting mirror 4 is made of carbofrax material, with center sandwich, two side opening of mirror body is embedding for mirror body
Block 5 is adhesively fixed；
6. mirror body abaculus 5 is made of the invar material with 4 matched coefficients of thermal expansion of reflecting mirror, and processes three on the outside
A perforative arc groove forms first layer flexible structure 5-1, and T-shape structure 5-2 is then processed on the outside of elastic construction, to
Increase splicing area in original coefficient of elasticity, this elastic construction form can guarantee the face type of reflecting mirror 4 at low temperature
Precision；
7. if travelling support shafting 6 includes shaft 6-1, bearing block 6-2, double-row self-aligning bearing 6-3, external screw thread pressing ring 6-4；
Double-row self-aligning bearing 6-3 is mounted in bearing block 6-2 inner hole, and cycle surface and bearing block 6-2 inner hole are closed by face paste；Shaft 6-
1 penetrates double-row self-aligning bearing 6-3 inner ring, and there are certain gaps with bearing inner race end face by face for the shaft shoulder；External screw thread pressing ring 6-4
Screw in bearing block 6-2, the positioning for double-row self-aligning bearing 6-3；
8. position of the pin 7 for reflecting mirror 4 locks, pin 7 uses invar material, and one end is closely matched with mirror body abaculus 5
It closes, the other end passes through the mesopore of 4 back side corresponding position of reflecting mirror, and fills epoxy resin in gap location.
The present invention has the advantages that
1) present invention significantly reduces U-shaped frame itself by simply increasing a crossbeam in conventional U-shaped top of the trellis
For two side arms to the amount of bow of two sides, this bending deformation can not pass through the axial unloading of shafting travelling support when deforming at low temperature
Effect is offset, and resulting additional sharp square will cause mirror surface type greatly to deteriorate.By leggiero beam structure, have
Improve to effect optics surface precision when directional mirror low operating temperatures；
2) present invention improves it by the flexible structure of mirror body abaculus periphery when carrying out the design of directional mirror clamping
Preceding simple thermally matched rigid abaculus, this design can effectively reduce abaculus glue-line Nian Jie with mirror body produced by low-temperature shrink
The hot Ying Li for acting on reflecting mirror；And shop bolt is radially increased by T-shape structure on the outside of flexible unit and abaculus
Design enhances the anti-benefit of mirror body clamping and learns performance；
3) mirror body clamping of the invention and supported design are in no feelings for increasing any exceptional space and small mass cost
Under condition, it will be apparent that improve the surface precision under directional mirror low temperature.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram of reflecting mirror shafting support and clamping device of the present invention；
In figure: 1 --- U-shaped frame；
2 --- fixed support shafting；
3 --- crossbeam；
4 --- reflecting mirror；
5 --- mirror body abaculus
6 --- travelling support shafting
7 --- pin
Fig. 2 is the structure composition schematic diagram of fixed support shafting 2；
In figure: 2-1 --- shaft；
2-2 --- bearing block；
2-3 --- match angular contact bearings；
2-4 --- internal screw thread pressing ring；
2-5 --- external screw thread pressing ring；
Fig. 3 is the structure composition schematic diagram of mirror body abaculus 5；
In figure: 5-1 --- flexible structure；
5-2 --- T-shape structure；
Fig. 4 is the structure composition schematic diagram of travelling support shafting 6；
In figure: 6-1 --- shaft；
6-2 --- bearing block；
6-3 --- double-row self-aligning bearing；
6-4 --- external screw thread pressing ring；
Specific embodiment:
A preferable embodiment of the invention is provided below according to Fig. 1 to Fig. 4, to illustrate structure feature and reality of the invention
Applying method, rather than range for the purpose of limiting the invention.
The support of reflecting mirror shafting and the clamping device used under low temperature in the present embodiment is applied to scarcity of resources, complete dereliction
The preposition directing mechanism of the optical instrument of certain planet surface exploration of dynamic temperature control.Reflecting mirror rotates 110 ° of total angle range, light beam
Diameter 100mm.- 80 DEG C of operating temperature, when delivery launch and flight device lands maximum overload acceleration up to 30 huge profit acceleration,
Random vibration root mean square acceleration 23g, impact reach 1800g.Device specifically includes following several parts: U-shaped frame 1, fixed support
Shafting 2, crossbeam 3, reflecting mirror 4, mirror body abaculus 5, travelling support shafting 6 and pin 7.
1) U-shaped frame 1: the high component aluminum-base silicon carbide composite material system small using thermal expansion coefficient, modulus is high, density is small
At, by subtly light-weight design, 300 grams of weight after processing.Diameter 30mm circular hole, which is opened, at the top of two side arms is used to support shafting
Installation, two sides circular hole coaxial degree are better than 0.01mm, guarantee the coaxial of two sections of shaftings with this.Processing platform is used at the top of side arm circular arc
Crossbeam 3 is installed, bottom centre Circularhole diameter 110mm with main optical path for being connected to；
2) fixed support shafting 2: including shaft 2-1, bearing block 2-2, match angular contact bearings 2-3, internal screw thread pressing ring 2-
4, external screw thread pressing ring 2-5.With angular contact bearings 2-3 select 71704AC ultra-thin-wall bearing, accuracy class P4, by reconditioning every
Delineation position it is pre- it is next be mounted in bearing block 2-2 inner hole, bearing block is made of titanium alloy TC 4, thermal expansion coefficient and U-shaped frame and
Bearing material matching.Its bearing group cycle surface and bearing block 2-2 inner hole are closed by face paste；The material of shaft 2-1 equally uses
TC4 is penetrated with 71704 inner ring of angular contact bearings, and the shaft shoulder is bonded by face with bearing inner race end face, and shaft end face is straight there are 3
Diameter 2.9mm through-hole, for being connected and fixed reflecting mirror abaculus；Internal screw thread pressing ring 2-4 and external screw thread pressing ring 2-5 uses stainless steel
Material, and it is processed into fine thread, screw pitch 0.5mm screws in shaft 2-1 and bearing block 2-2 respectively, for matching angular contact bearings 2-
3 positioning and preload benefit apply；
4. crossbeam 3: being made of the high component aluminum-base silicon carbide composite material of material identical with U-shaped frame 1, be configured as being inverted
It is U-shaped, only 25 grams of design weight.Crossbeam mainly provides axial push-pull and bending resistance stiffness, so increasing as far as possible in crossbeam design
The width of crossbeam, and reduce thickness to reduce the position limitation to reflecting mirror rotation.Two sides respectively pass through 4 M2 screws and are fixed on U
1 top of type frame guarantees coupling stiffness during benefit with diameter 2.5mm cylindrical pins are beaten after installation；
5. reflecting mirror 4: using carbofrax material, be made of reaction sintering technology.Shape is the plane reflection of ellipse
Mirror.Its short axle 110mm, long axis 200mm.Mirror body is designed to class trapezium structure, along long axis center thickness 20mm, edge thickness 4mm,
With lightweight mirror body weight.Reflecting mirror is center sandwich, and light slot is reduced in reflecting surface and back side closing, vertical thickness direction,
Mirror body rigidity can be maximized under certain weight by being designed in this way, thus being deformed under reducing low temperature by benefit.It opens mirror body two sides
Diameter 14mm semi-circular hole, is adhesively fixed for mirror body abaculus 5；
6. mirror body abaculus 5: being made of the invar 4J36 material with 4 matched coefficients of thermal expansion of reflecting mirror, shape is diameter
The semicircle of 14mm, thickness 8mm.The threaded hole of 3 M2.5 is processed in abaculus end face, for being fixedly connected with shaft.Outside it
Side processes three perforative arc grooves and forms first layer flexible structure 5-1, flexible structure body span 8mm, thickness 0.5mm；Then
T-shape structure 5-2 is processed on the outside of elastic construction, to increase splicing area, T-shape structure in original coefficient of elasticity
Crossbeam length 12mm, width 8mm, thickness 1mm；Mullion structure length 1mm, width 8mm.This elastic construction is cut by Precision wire
Machine-shaping is cut, elastic construction parameter optimizes by simulation analysis, it is ensured that the surface precision of reflecting mirror 4 at low temperature, and
The benefit for being able to bear requirement learns load；Abaculus and mirror body are Nian Jie by epoxy resin adhesive, bondline thickness 0.1mm,
Each three adhesive spots in two sides；
7. such as travelling support shafting 6: including shaft 6-1, bearing block 6-2, double-row self-aligning bearing 6-3, external screw thread pressing ring 6-
4；Double-row self-aligning bearing 6-3 passes through special designing, guarantees to eliminate its radial internal clearance while axis bidimensional is freely rotated, to meet
The radial rigidity of shafting support.Bearing is mounted in bearing block 6-2 inner hole, and cycle surface and bearing block 6-2 inner hole lean on face paste
It closes, bearing seat material uses TC4；Shaft 6-1 penetrates double-row self-aligning bearing 6-3 inner ring, and the shaft shoulder is by face and bearing inner race end face
There are certain gap, material equally uses TC4, and end face processes the through-hole of 3 diameter 2.9mm, for embedding with directional mirror
Block connection；External screw thread pressing ring 6-4 is that fine thread is made using stainless steel, and screw pitch 0.5mm screws in bearing block 6-2, is used for biserial
The positioning of self-aligning bearing 6-3；Bearing and shaft realize the axial thermal deformation unloading effect at travelling end with this directly without constraint；
8. pin 7: learning the position in environment in benefit for reflecting mirror 4 and lock, pin is the cylindrical body of diameter 2.5mm, is adopted
It is made of invar material.One end and mirror body abaculus 5 are interference fitted, and the other end passes through the mesopore of 4 back side corresponding position of reflecting mirror,
Gap bore dia 2.9mm fills epoxy resin at gap (0.2mm), and design in this way is kept away while ensure that reliable location
The excessive percussion in vibration environment to mirror body is exempted to be rigidly attached to.
As described above, the shafting support of reflecting mirror can learn secure support and dress in environment guaranteeing benefit with clamping design
While folder, it is satisfied surface precision of the reflecting mirror in low-temperature working.By increasing in U-shaped top of the trellis in shafting support
Add crossbeam and the optimization design for end support shafting of moving about, the deformation of low temperature flowering structure can be effectively reduced to the adjection of reflecting mirror
Benefit；By the optimization design of the elastic construction to mirror body abaculus, while ensure that reflecting mirror Low Temperature Thermal answers benefit to unload
Big benefit can be resisted and learn load.The support of the reflecting mirror and clamping device are compact-sized, quality is light and handy, are adapted to big benefit
Overload and low-temperature working environment are learned, is applicable to quality, volume requirement harshness, sharp thermal environment and its severe space cabins refer to outside
To sweep mechanism application.
Claims (8)
1. the support of reflecting mirror shafting and clamping device that one kind uses at low temperature, including U-shaped frame (1), fixed support shafting
(2), crossbeam (3), reflecting mirror (4), mirror body abaculus (5), travelling support shafting (6) and pin (7), it is characterised in that:
Fixed support shafting (2) and travelling support shafting (6) are separately fixed at the top of U-shaped frame (1) in two side opening；Institute
The crossbeam (3) stated is fixed by screws at the top of U-shaped frame (1), and is matched and broken pin；The mirror body abaculus (5) passes through adhesive
It is fixed in the inner hole of reflecting mirror (4) two sides, outer side end face connects with fixed support shafting (2) and travelling support shafting (6) respectively
It connects；Described pin (7) one end and mirror body abaculus (5) is fitted close, and the other end passes through between the corresponding position of reflecting mirror (4) back side
Lyriform pore, and epoxy resin is filled in gap location.
2. the support of reflecting mirror shafting and clamping device that one kind as described in claim 1 uses at low temperature, which is characterized in that
The U-shaped frame (1) is made of with the match metal material of (± 1) of reflecting mirror (4) thermal expansion coefficient, at the top of two heel posts
Shafting installation is supported, there is the column dome of installation crossbeam (3), bottom centre hole is connected to other systems optical path.
3. the support of reflecting mirror shafting and clamping device that one kind as described in claim 1 uses at low temperature, which is characterized in that
Fixed support shafting (2) includes shaft (2-1), bearing block (2-2), with angular contact bearings (2-3), internal screw thread pressing ring
(2-4), external screw thread pressing ring (2-5)；
Described is mounted in bearing block (2-2) inner hole with angular contact bearings (2-3), cycle surface and bearing block (2-2)
Inner hole is closed by face paste；Shaft (2-1) is penetrated with angular contact bearings (2-3) inner ring, and the shaft shoulder is pasted by face and bearing inner race end face
It closes；Internal screw thread pressing ring (2-4) and external screw thread pressing ring (2-5) screw in shaft (2-1) and bearing block (2-2), positioning and application respectively
It pre-tightens benefit and matches angular contact bearings (2-3).
4. the support of reflecting mirror shafting and clamping device that one kind as described in claim 1 uses at low temperature, which is characterized in that
The crossbeam (3) is configured as inverted U-shaped using identical material is made with U-shaped frame (1), is fixed by screws in U-shaped frame
(1) top guarantees to be reliably connected with pin (7) are beaten after installation.
5. the support of reflecting mirror shafting and clamping device that one kind as described in claim 1 uses at low temperature, which is characterized in that
The reflecting mirror (4) is made of carbofrax material, and with center sandwich, mirror body two sides are adhesively fixed mirror body abaculus
(5)。
6. the support of reflecting mirror shafting and clamping device that one kind as described in claim 1 uses at low temperature, which is characterized in that
The mirror body abaculus (5) is made of the invar material with reflecting mirror (4) matched coefficients of thermal expansion, and processes three on the outside
A perforative arc groove forms first layer flexible structure (5-1), and T-shape structure (5-2) is then processed on the outside of elastic construction,
To increase splicing area in original coefficient of elasticity, this elastic construction form can guarantee reflecting mirror (4) at low temperature
Surface precision.
7. the support of reflecting mirror shafting and clamping device that one kind as described in claim 1 uses at low temperature, which is characterized in that
Travelling support shafting (6) includes shaft (6-1), bearing block (6-2), double-row self-aligning bearing (6-3), external screw thread pressing ring
(6-4)；
The double-row self-aligning bearing (6-3) is mounted in bearing block (6-2) inner hole, in cycle surface and bearing block (6-2)
It is closed by face paste in hole；Shaft (6-1) penetrates double-row self-aligning bearing (6-3) inner ring, and there are one with bearing inner race end face by face for the shaft shoulder
Fixed gap；External screw thread pressing ring (6-4) screws in bearing block (6-2), is used for the positioning of double-row self-aligning bearing (6-3).
8. the support of reflecting mirror shafting and clamping device that one kind as described in claim 1 uses at low temperature, which is characterized in that
The pin (7) uses invar material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910246101.XA CN109946812A (en) | 2019-03-29 | 2019-03-29 | It is a kind of use at low temperature reflecting mirror shafting support and clamping device |
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|---|---|---|---|
| CN201910246101.XA CN109946812A (en) | 2019-03-29 | 2019-03-29 | It is a kind of use at low temperature reflecting mirror shafting support and clamping device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110941084A (en) * | 2019-12-19 | 2020-03-31 | 中国科学院长春光学精密机械与物理研究所 | Satellite-borne scanning mechanism |
| CN113759537A (en) * | 2021-09-08 | 2021-12-07 | 中国科学院国家天文台南京天文光学技术研究所 | Reflector switching mechanism of optical telescope |
| CN114200634A (en) * | 2021-11-29 | 2022-03-18 | 北京空间机电研究所 | Space camera directional reflector assembly |
| CN115128718A (en) * | 2022-07-29 | 2022-09-30 | 洛阳瑄宇光电科技有限公司 | Non-modified high-precision light reflector and processing method thereof |
| CN117741902A (en) * | 2024-02-19 | 2024-03-22 | 中国科学院长春光学精密机械与物理研究所 | Shock-resistant flexible structure of reflecting mirror |
| CN117741902B (en) * | 2024-02-19 | 2024-05-14 | 中国科学院长春光学精密机械与物理研究所 | Shock-resistant flexible structure of reflecting mirror |
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